Teamwork Coursework Example | Topics and Well Written Essays - 500 words

Teamwork - Coursework Example Resistance to the approach may be due to the struggle over control of the leadership of the group, which may be due to divergent opinions or challenging the decisions made by the team leader (Cragan 78). Another reason for resistance may be due to hostile leadership where the team leader either may be racist, sexist or practices various discriminatory practices. Resistance in the form of a bid to control the team in terms of ideas may be dealt with by brainstorming of opinions shared by the team players and accommodating everyone’s opinion. Hostile leadership can be controlled by action from all the team players as opposed to the challenger and the team leader holding a private dialogue. Experts view teams as means, not an end in that they view the team as a way of achieving the vision of the organization. An end is described as the goal of the organization where the teams created are deemed as a way of achieving the vision and not the vision itself. Companies that focus on creating teams as opposed to achieving its goals is bound to collapse if the strategy is not looked into (Means 56). A company should focus on the ultimate aim of attaining its goals, which may be achieved by formation of teams among other strategies (Rothstein 100). It is important that team members analyze their team role at their work place, their contribution and whether or not they are comfortable with their specific position. The roles of team players may be categorized into task roles, nurturing roles and dysfunctional roles. One can become a better team member by understanding their responsibility and understanding that the decisions that they make affect the overall performance of the team. The concept of self-management of employees is highly successful in organizations where the decision-making by employees is embraced (Cheltenham 60). Self-managed groups are held

The setting, population, and program Essay Example for Free

The setting, population, and program Essay Second Step is a violence prevention program has been implemented for Norman area 6th graders. This program focuses on such things as anger management, conflict negotiation, controlling emotions and not acting on impulse. It is designed to give students examples and topics of discussion that will promote thought provoking discussions and hopefully draw out some best behaviors as examples while exposing what should not be done The lessons are usually presented by teachers on a regular schedule and during the same class period when possible. They are designed so that teachers have to prepare very little. Scripts are provided for video programs and for scenario type role playing among the students. The videos attempt to show students reacting to violence or other negative influences as they might encounter them in their daily lives. For this age of student the lessons encourage modeling of the positive behavior that is shown in the videos and proper behavior from role playing and discussion. 2. What are the goals of the program and what are the problems/challenges in trying to meet them? (What is working and what is not working? ) The goal of this program is to ultimately reduce violence in schools. The curriculum is designed to obtain these results by getting the children to recognize their behaviors, beliefs and emotions and learn to deal with them in a positive manner. These activities would hopefully establish norms within the school community and allow the proper behavior to become the norm. These objectives are sometimes difficult to master and meet the standards of the program. Children that go through the Second Step program will generally engage in the curriculum if the instructor has prepared somewhat and is ready to lead the discussion. There are often very positive and mature comments from the students regarding the scenarios and video portions of the program. It really seems to help students who are on the right track reaffirm what they already believe to be the right thing to do. There are students who will always want to lead the discussion and have there answers heard. This is good for certain kids and it really helps the teachers who are leading the discussion. One downfall is that certain students will not engage in the discussion. Some are embarrassed or do not feel confident voicing their opinion in front of the group. The reasons for this vary from past experience with the group, fear of repercussion and lack of maturity on the part of the studen. Still others will loose face within their peer group if they show emotion or put down certain behaviors. These groups will often try to disrupt the flow of the conversation by belittling or not participating at all. They will blame the teacher or the program as being boring. The program may help a select few students develop a better sense of what it takes to prevent violence, but the lessons don’t seem to carry much further than the classroom. It is one thing to model good behavior in front of adults and quite another thing to stand up and do the right thing when no one is there to support their decision. Many students will turn their backs on violence in their area. 3. What evaluation strategies would you use and what type of data (e. g. , test scores, attendance records, referrals, etc. ) would you need to collect in order to substantiate the information stated in response to question #2? How would you evaluate future progress/change? How often does data need to be collected and analyzed? Evaluation of programs such as Second Step can be very difficult. With the end goal being less violence in the school, the number of principal office referrals would be the obvious first line in evaluating the progress of the program. A drop in the number of referrals due to violent acts would be a good indicator that the program is having some effect. Data would also need to be collected from past referrals and compare to the new data to see if which students were committing new act of violence. We would hope to see an overall drop in the number of violent acts among both past offenders and new offenders. Data should be collected on a quarterly basis to ensure that the needs of offending groups are being met. If data is collected on a longer scale (i. e. semester or yearly), it may not facilitate change quickly enough to the methods of delivery or it may not look for other factors within the school environment that may be effecting violent behaviors 4. What factors seem to be facilitating progress/change and which factors seem to be hindering progress/change? The ability of the teacher that is leading the course and who sees that group of students on a regular basis seems to be one factor in determining how successful the program is. If the material is simply presented and nor reinforced through repetition and school wide implementation, the lessons are quickly lost on many students. Staff that believe in the program will tend to follow up and ensure that the lessons are being used outside the context of the presentation time. The talent and motivation of the staff tends to be huge factor in success or failure of the program. It is very difficult to change perceptions and learned behaviors. Many students will participate in the program but will be taught different attitudes at home. This appears to be the largest factor in whether a student will accept the lessons of Second Step or not. When staff and family will follow through and continue the lessons outside of the context of the Second Step allotted time, there seems to be a much better chance of the students applying the lessons. Hindering change occurs when the lessons are left in the classroom and not made part of daily life at school. This will be the biggest obstacle that we face. 5. What recommendations would you make for change or improvement, based on the information that is available at this point? To fully implement such a program there has to be community wide acceptance. There needs to be an outreach effort to parents and other family members to allow them the opportunity to see the materials that are being presented. They should be a part of the effort. The message may not always be reaching home that students are working on violence prevention and reinforcement is needed from all areas of the community. By making family members part of the equation we will allow a better opportunity for success. 6. Who are your â€Å"stakeholders†? (Who has a â€Å"vested interest† in the outcome of your program? ) Who needs to receive a report on both progress and problems/challenges/needed changes? The stakeholders of the program in the end are all members of the community. The community benefits when there is less violence and when more productive citizens graduate from our schools. Families will see the most immediate effects when their children are in less trouble at school and see better results in their academic work. All educators, school families and the community in general including local police and government should receive the report of findings and have a voice in how to proceed. When the schools, police or family place themselves as the sole proprietors of the responsibility of the violence among our young student, we face more obstacles due to miscommunication, personal agendas and lack of understanding of the problem from on a human level in dealing with students who have violence issues.

Effect of Humorous Advertisements on Customer Behavior

Effect of Humorous Advertisements on Customer Behavior Humor has a universal language. It doesnt need degrees in obscure languages, hardly ever in Clinical Psychology and it is one of the few devices used to make people smile and think at the same time. Humor has been widely used in advertising. However, while humor has attained popularity in advertising, its use is continuously being debated. The reason for this debate is that there are a number of both positive and negative effects which can be attributed to the use of humor. The purpose of this research paper is to answer following questions:- The impact of gender age on the degree of affection to the ads. The effect of humor appeal in Ads, on the consumers buying decision. To develop the conclusions exploratory descriptive research designs are used. Primary data are collected with the help of Focus group technique questionnaire method data is analyzed with the help of various statistical techniques. The conclusions of this paper help in clarifying the dilemma of humorous advertisements. Introduction: Advertising is one of the critical marketing variables which marketers use to differentiate products in a cluttered marketplace. In order to increase the effectiveness of advertising for a product, advertising messages should be unique and meaningful. This concurs with the von Restorff effect, which concludes that interference is minimized by the presentation of a unique item in a group of similar items. Companies have attempted to use many vehicles to create this differentiation effect. One such vehicle is the employment of humor. In order to have a better understanding, we need to further explore the world of advertisements, the appeals used, the targeted decision making components and the effects of Ads on the targeted consumer as a whole. There are two main components advertisers aim to effect; the affective component, where affective message strategies are applied by invoking feelings and trying to match them with the product or service offered in an effort to increase the likeability of the product, and also the cognitive components, where the Ad focuses on the attributes and benefits of the product, encouraging the consumer to buy it. Such components are affected by the leverage points in an Ad; these are the features in the Ad that helps the consumer transfer the advertised message into personal value. In order to achieve that, over the years, advertisers have attempted a wide variety of advertising approaches, there are seven main ones; fear, humor, sex, music, rationality, emotions and scarcity. Advertisers use one or combine several of these appeals to ensure that their targeted audiences receive their message. However, nowadays, humor appeal is being used extensively sometimes combined with others, but most of the time it is strong enough to be used solely. Humor in advertising constitutes billions of dollars in spending each year (Campbell et al. 44). A variety of benefits have been suggested for humorous appeals including: 1) Humor attracts attention. 2) Humor can increase retention of the advertising message. 3) Credibility of the source can be enhanced with humor. 4) Attitude toward the ad can be enhanced with the use of humor. 5) Counter arguments may be minimized with the use of humor because it acts to distract the audience from making cognitive responses. Furthermore, the popularity of humor is evident in the fact that 24.4% of television advertisements attempt to be humorous (Alden Hoyer 29). However, while humor has attained popularity in advertising, its use is continuously being debated. The reason for this debate is that there are a number of both positive and negative effects which can be attributed to the use of humor. Throughout the literature of this paper, the debatable effect of this appeal is discussed. Literature Review: There has been numerous researches proving that advertisement with humorous appeal can gain consumers likability. A strong positive correlation is also found between the degree of how well an advertisement is liked with the likability to the brand advertised (e.g., Gelb Pickett, 1983; Haley Baldinger, 1991; Weinberger Campbell, 1991; Zhang, 1996). In short, adding humorous elements can enhance ones likability of an advertisement and eventually increase liking to the brand advertised. Defining Humor Humor has been widely used in advertising. It has been suggested that 24.4% of prime time television advertising in the U.S. is intended to be humorous (Weinberger Spott, 1989). Regarding to advertising budget, 10% to 30% out of the total expenditure of $150 billion in the U.S. national media, is paid for the placement of advertisements that are having humorous content (Spotts, Weinberger Parsons, 1997). Operationally. humor is defined, according to Sternthal and Craig (1973), as heightened arousal, smiles, and laughter exhibited by an audience in response to a particular message (p.13). Moreover, humor can be defined in terms of how well the audience perceive the level of humor and it can be administered by pencil and paper test to measure how the audience perceive a particular message is humorous and funny or not. Humor in Advertising and Its Effect The reason why humor has been widely used in advertising is due to its power of create liking towards the advertisement by from the consumer. It has been found by Weingerber and Spotts (1989) that advertising practitioners coming from the U.S. and U.K. are generally favor in the use of humor on advertising. A couple of reasons are found and supported by many other researches that humor can enhance ones favorable attitude towards an advertisement. It is reviewed by Weingerber and Gulas (1992) that ten advertising studies and seven non-advertising studies report a positive effect of humor on liking while only two advertising studies and three non-advertising studies report neutral or mixed findings. Objective: The purpose of this research paper is to answer following questions:- The impact of gender age on the degree of affection to the ads. The effect of humor appeal in Ads, on the consumers buying decision. Research Methodology (a) Research Design: To have a better understanding about the issue exploratory research design was used. Two focus groups (i.e. one for each gender) were conducted to get the in depth insights about the topic. Each group consisted of 7 persons. Further descriptive research design was used to get the primary data with the help of close ended questionnaire. (b) Sample Design: 70 respondents were selected through convenience sampling. (c) Analysis: The data collected was analyzed with the help of various statistical tools like Chi-square test, ANOVA etc. Analysis Interpretations Exploratory research results: (I) Focus Group (A) It consisted of 7 males who were asked to provide views on the issue. It was a general opinion that to make the ad interesting creative there is in no harm in using humor appeal in ad but one also considered it purely offensive. They were also agreed on the fact that some time they buy the product because of Ad effect but product attributes are also equally important. (II) Focus Group (B) It consisted of 7 females who were asked to provide views on the issue. A contradiction in views was seen; half of them believed that humor appeal increases the liking of ads while rest treated it offensive or unaffected. 70% of them said that advertisements dont affect the purchase decision. (b) Descriptive research results: 54% of the respondents were male rests were female. 24% of the respondents were from less than 30 years age group 76% were from more than 30 years age group. 55% of the respondents admitted that their intuition or the way they feel about the product finalize their decision of purchasing the product, 35 % considered advertisement of product as the basis of purchase decision and rest purchase the product because of the attributes of product. 62% indeed admitted that they have purchased the product just because they liked the commercial. Both results indicate the affect of advertisements on the purchase decision of customers. When asked what they look for in an Ad; 45% believed the most important attribute of an ad is creativity, followed by 26% who believed it was the endorsers used how they relate to them. 56% of the respondents believed that, the use of humor content in advertisements is acceptable for products as long as its within certain limits. 27% found it offensive rest said that humor appeal increases the creativity of ads. Four print advertisements containing humor appeal (Refer Appendix) were shown respondents were asked to disclose their views. The results were as follow:- Response Ad 1 Ad 2 Ad 3 Ad 4 Total Percentage Offensive 0 7 0 12 19 7% Interesting 11 16 16 16 59 21% Creative 24 5 36 19 84 30% Really Nice 29 29 10 10 78 28% Unethical 0 7 6 13 26 9% Unaffected / Bored 6 6 2 0 14 5% Total 70 70 70 70 280 100% 58% of the customers found the advertisements Creative nice while very few respondents treated it offensive or unethical, which indicates that respondents are taking advertisements in positive manner. Majority of Respondents (i.e. 75%) replied that they would purchase the product based on the advertisements the humor appeal used in ads changed their purchase decision. (c) Hypothesis Testing: H01 = There is no association between degree of affection to the ads gender of respondents H11 = There is an association between degree of affection to the ads gender of respondents. Gender Degree of Affection Total Smart / Creative Inappropriate / Unethical Correct where needed Male 8 8 22 38 Female 4 11 17 32 Total 12 19 39 70 à Ã¢â‚¬ ¡ 2 test Calculated Value Degree of Freedom Level of Significance Tabulated Value 1.94 2 5% 5.99 The result of the study shows that the null-hypothesis holds to be valid thus there is no association between degree of affection to the ads gender of respondents. H02 = Degree of affection towards the ads will be the same irrespective of the age of respondents. H12 = Degree of affection towards the ads will not be the same irrespective of the age of respondents. Age Degree of Affection Total Smart / Creative Inappropriate / Unethical Correct where needed 1 11 5 17 >30 Years 11 8 34 53 Total 12 19 39 70 ANOVA (F-ratio) Calculated Value Degree of Freedom Level of Significance Tabulated Value 1.66 (1,2) 5% 18.501 The analysis supports the null-hypothesis that degree of affection towards the ads will be the same irrespective of the age of respondents. In other words age was found to have no significant differences on the degree of affection to the ads. H03 = Humor appeal doesnt affect the buying decision of respondents. H13 = Humor appeal affects the buying decision of respondents. Product Purchase Decision Change Total Agree Disagree Yes 102 107 209 No 19 52 71 Total 121 159 280 à Ã¢â‚¬ ¡ 2 test Calculated Value Degree of Freedom Level of Significance Tabulated Value 10.52 1 5% 3.841 The analysis provides enough evidence to reject the null Hypothesis. In other words Humor appeal affects the buying decision of respondents. Conclusions: It is a big question in marketing area that how the Humor appeal used in advertisements, is perceived by respondents. In the same line this research was conducted and following conclusions were drawn:- Humor appeal was not taken in negative manner by respondents if it was used in a limit for the relevant products to make the ad creative. Exploratory research shows that there is a thin line difference between the opinion of males females but as per the chi-square there is no significant difference in the views of males females towards the advertisements. Respondents of every age group having the same views on the issue. Humor appeal used in advertisements motivated the respondents to purchase the product but attributes of the product also plays a significant role in buying decision. References: Journal of Legal, Ethical and Regulatory Issues  /  Jan-July, 2006 Ethics in advertising: sex sells, but should it? by Jessica Dawn Blair, Jason Duane Stephenson, Kathy L. Hill, John S. Green The Ethical Dilemma of Advertisements By: May Abd El Latif El Hattab http://www.ukessays.com/essays/marketing/sexual-appeals.php http://www.articleswave.com/advertising-articles/types-of-advertising-appeals.html

linux encryption Essay -- essays research papers

.: Contents :. I. INTRO - About   Ã‚  Ã‚  Ã‚  Ã‚   II. ENCRYPTING - Containers - Drives - Files   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   APPENDIX   Ã‚  Ã‚  Ã‚  Ã‚   .: I. INTRO :. [-=] About [=-] This is a quick rundown on how to encrypt files, containers, and drives under Linux. The use of loopback encrypted filesystems and openssl is explained and examples are given. This paper should have you encrypting in no time. The following commands were done running kernel 2.6.9. .: ENCRYPTING :. I'll outline how to create encrypted containers and drives using the loopback filesystem support and file encryption via openssl. [-=] Containers [=-] This is essentially creating a filesystem within a file and mounting it as a device. Containers vastly decrease the tedious task of individually encrypting files since you simply move your files into the mount point and then unmount and they nicely encrypted. First, you need to create a blank file using the dd command. dd if=/dev/urandom of=crypto.img bs=1M count=50 - The first parameter uses the /dev/urandom device to create the file with random data to make it more difficult to distinguish between free space and encrypted data. The /dev/zero device can be used but is not advised. - The second parameter of=crypto.img defines the name to be given to the file and this can be changed to suit your preference. - The third parameter bs=1M instructs the dd command to create the file in 1MB blocks. I recommend you leave this value as 1M - The final parameter defines the size of the file in relation to the bs parameter. Since bs=1M and count=50 the file will be 50MB hence changing the count value to 100 would yield a 100MB file and so on. It is worth mentioning that the file can be resized once created this will be explained in the appendix. Second, the file must be associated to a loop device and encrypted. losetup -e aes256 /dev/loop0 crypto.img - The parameter -e aes256 at the beginning instructs losetup on which cipher to use. The cipher type is dependent on what your kernel supports. In this example the AES 256 bit cipher is used but you can use other cipher types such as blowfish interchangeably. - The second parameter /dev/loop0 is the device to which we bind the file too. Binding the file will allow us to format the file with filesystem. - The final pa... ...utputs at password.txt.enc. (This is a rather redundant explanation but oh well) Now to decrypt a file. openssl enc -d -aes-256-cbc -in password.txt.enc -out password.txt - The enc -d -aes-256-cbc part of the command specifies which cipher to use for decryption. - The -in password.txt parameter specifies which file to decrypt. - The final parameter instructs openssl to output the decryption into a file. This parameter can omitted and the file will be decrypted to stdout. .: APPENDIX :. [-=] Resizing containers [=-] If you formatted your container with the ext2 filesystem you can resize it with the ext2resize app. First, increase the size of the container. In this example the file acting as the encrypted container is called crypto.img and its size is incremented by 20MB. dd if=/dev/urandom bs=1M count=20 >> crypto.img - The of= parameter is omitted and instead >> is used at the end of the command to append 20MB to the crypto.img file. Second, bind the file to a loop device. losetup -e aes256 /dev/loop0 crypto.img Third, extend the ext2 filesystem within the container. ext2resize /dev/loop0 That is all thats needed to resize your encrypted container.

Biology A2

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level * 2 3 0 8 9 6 9 9 7 3 * BIOLOGY Paper 5 Planning, Analysis and Evaluation Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black ink. You may use a pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions.At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. 9700/51 October/November 2011 1 hour 15 minutes For Examiner’s Use 1 2 Total This document consists of 8 printed pages. DC (CB (SE/DJ)) 34786/4  © UCLES 2011 [Turn over 2 1 Photosynthesis was investigated in a species of unicellular alga using the apparatus shown in Fig. 1. 1. suspension of unicellular algae in water For Examiner’s Use 10. 0 light of known wavelength oxygen probe magnetic stirrer Fig. 1. Two different strains of the species of alga were tested using a range of different wavelengths of light. †¢ †¢ Light of known wavelength was passed through the tube containing algae for two hours. The light transmission through the suspension and the oxygen concentration were then measured. light meter oxygen meter The results were used to plot the absorption spectrum and the action spectrum for each strain of alga. Fig. 1. 2 shows these spectra. strain A strain B absorbance absorption spectra 400 500 600 700 wavelength of light / nm rate of photosynthesis action spectra 400 500 600 700 wavelength of light / nm Fig. . 2  © UCLES 2011 9700/51/O/N/11 3 (a) (i) State the two dependent variables in this investigation. 1. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã ¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 2. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [2] (ii) Apart from temperature and pH, which have little effect, state two variables that should be standardised during this investigation. 1. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ . †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚ ¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [2] (b) (i) Water with no suspended algae transmits 100% of the light. State how the data to plot the absorption spectrum was obtained. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [1] (ii) State the data which would be used t o plot the action spectrum. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. [1] The photosynthetic pigments of the algae were extracted and were separated by two-way chromatography. The pigments were first separated by one solvent and then separated again by a second solvent at right angles to the first solvent. Fig. 1. 3. shows the results for the two different strains. strain A solvent front 1 4 3 2 direction of first solvent 1 origin 6 1 origin 5 3 2 6 strain B 5 solvent front 1 For Examiner’s Use solvent front 2 direction of second solvent Fig. . 3 solvent front 2 (c) Using the information in Fig. 1. 3, suggest why using two different solvents gives a better separation of these pigments than just using one solvent. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. [2]  © UCLES 2011 9700/51/O/N/11 [Turn over 4 (d) Outline a procedure that a student could use to extract the photosynthetic pigments and obtain these chromatograms. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚ ¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢ € ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ 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¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. [8] For Examiner’s Use UCLES 2011 9700/51/O/N/11 5 (e) Different photosynthetic pigments absorb different wavelengths of light. Table 1. 1 shows some information about the pigments, P, Q, R , S and T, found in these unicellular algae, including the wavelength of light at which maximum light absorption occurs. Table 1. 1 pigment wavelength of light / nm 620 545 and 547 420 and 660 490 430 and 645 Rf value solvent 1 0. 20 0. 60 0. 65 0. 91 0. 82 solvent 2 0. 89 0. 29 0. 11 0. 19 0. 92 For Examiner’s Use P Q R S T Rf = distance moved by pigment distance moved by solvent frontOne of the strains of algae lacks one of the pigments. Using the information in Table 1. 1, Fig. 1. 2 and Fig. 1. 3: (i) identify the strain of alga that lacks one of these pigments and state the letter of the missing pigment †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [1] (ii) state the evidence that supports your answer to (i). †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢ € ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [2] (iii) In water, the shorter the wavelength of light, the deeper it travels. Suggest why it is an advantage to have the pigment that you identified in (i). †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦.. [1] [Total: 20]  © UCLES 2011 9700/51/O/N/11 [Turn over 2 A student carried out some investigations into the inheritance of body colour and wing length in the fruit fly, Drosophila melanogaster, to test the hypothesis: The inheritance of body colour and wing length in fruit flies is controlled by two genes on separate chromosomes. The student carried out three genetic crosses. To carry out each cross the following procedure was used: †¢ †¢ â⠂¬ ¢ male and virgin female adult fruit flies were placed into a breeding unit containing a culture medium for their larvae after mating and egg laying, the adult fruit flies were removed newly emerged adult fruit flies were sexed by observing the shape of the last

Sigmund Freud - The Father of Psychoanalysis

Sigmund Freud - The Father of Psychoanalysis Sigmund Freud is best known as the creator of the therapeutic technique known as psychoanalysis. The Austrian-born psychiatrist greatly contributed to the understanding of human psychology in areas such as the unconscious mind, sexuality, and dream interpretation.  Freud was also among the first to recognize the significance of emotional events that occur in childhood. Although many of his theories have since fallen out of favor, Freud profoundly influenced psychiatric practice in the twentieth century. Dates: May 6, 1856 September 23, 1939 Also Known As: Sigismund Schlomo Freud (born as); Father of Psychoanalysis Famous Quote: The ego is not master in its own house. Childhood in Austria-Hungary Sigismund Freud (later know as Sigmund) was born on May 6, 1856, in the town of Frieberg in the Austro-Hungarian Empire (present-day Czech Republic). He was the first child of Jacob and Amalia Freud and would be followed by two brothers and four sisters. It was the second marriage for Jacob, who had two adult sons from a previous wife. Jacob set up business as a wool merchant but struggled to earn enough money to take care of his growing family. Jacob and Amalia raised their family as culturally Jewish, but were not especially religious in practice. The family moved to Vienna in 1859, taking up residence in the only place they could afford the Leopoldstadt slum. Jacob and Amalia, however, had reason to hope for a better future for their children. Reforms enacted by Emperor Franz Joseph in 1849 had officially abolished discrimination against Jews, lifting restrictions previously placed upon them. Although anti-Semitism still existed, Jews were, by law, free to enjoy the privileges of full citizenship, such as opening a business, entering a profession, and owning real estate. Unfortunately, Jacob was not a successful businessman and the Freuds were forced to live in a shabby, one-room apartment for several years. Young Freud began school at the age of nine and quickly rose to the head of the class. He became a voracious reader and mastered several languages. Freud began to record his dreams in a notebook as an adolescent, displaying a fascination for what would later become a key element of his theories. Following graduation from high school, Freud enrolled at the University of Vienna in 1873 to study zoology. Between his coursework and lab research, he would remain at the university for nine years. Attending University and Finding Love As his mothers undisputed favorite, Freud enjoyed privileges that his siblings did not. He was given his own room at home (they now lived in a larger apartment), while the others shared bedrooms. The younger children had to maintain quiet in the house so that Sigi (as his mother called him) could concentrate on his studies. Freud changed his first name to Sigmund in 1878. Early in his college years, Freud decided to pursue medicine, although he didnt envision himself caring for patients in a traditional sense. He was fascinated by bacteriology, the new branch of science whose focus was the study of organisms and the diseases they caused. Freud became a lab assistant to one of his professors, performing research on the nervous systems of lower animals such as fish and eels. After completing his medical degree in 1881, Freud began a three-year internship at a Vienna hospital, while continuing to work at the university on research projects. While Freud gained satisfaction from his painstaking work with the microscope, he realized that there was little money in research. He knew he must find a well-paying job and soon found himself more motivated than ever to do so. In 1882, Freud met Martha Bernays, a friend of his sister. The two were immediately attracted to one another and became engaged within months of meeting. The engagement lasted four years, as Freud (still living in his parents home) worked to make enough money to be able to marry and support Martha. Freud the Researcher Intrigued by the theories on brain function that were emerging during the late 19th century, Freud opted to specialize in neurology. Many neurologists of that era sought to find an anatomical cause for mental illness within the brain. Freud also sought that proof in his research, which involved the dissection and study of brains. He became knowledgeable enough to give lectures on brain anatomy to other physicians. Freud eventually found a position at a private childrens hospital in Vienna. In addition to studying childhood diseases, he developed a special interest in patients with mental and emotional disorders. Freud was disturbed by the current methods used to treat the mentally ill, such as long-term incarceration, hydrotherapy (spraying patients with a hose), and the dangerous (and poorly-understood) application of electric shock. He aspired to find a better, more humane method. One of Freuds early experiments did little to help his professional reputation. In 1884, Freud published a paper detailing his experimentation with cocaine as a remedy for mental and physical ailments. He sang the praises of the drug, which he administered to himself as a cure for headaches and anxiety. Freud shelved the study after numerous cases of addiction were reported by those using the drug medicinally. Hysteria and Hypnosis In 1885, Freud traveled to Paris, having received a grant to study with pioneering neurologist Jean-Martin Charcot. The French physician had recently resurrected the use of hypnosis, made popular a century earlier by Dr. Franz Mesmer. Charcot specialized in the treatment of patients with hysteria, the catch-all name for an ailment with various symptoms, ranging from depression to seizures and paralysis, which mainly affected women. Charcot believed that most cases of hysteria originated in the patients mind and should be treated as such. He held public demonstrations, during which he would hypnotize patients (placing them into a trance) and induce their symptoms, one at a time, then remove them by suggestion. Although some observers (especially those in the medical community) viewed it with suspicion, hypnosis did seem to work on some patients. Freud was greatly influenced by Charcots method, which illustrated the powerful role that words could play in the treatment of mental illness. He also came to adopt the belief that some physical ailments might originate in the mind, rather than in the body alone. Private Practice and Anna O Returning to Vienna in February 1886, Freud opened a private practice as a specialist in the treatment of nervous diseases. As his practice grew, he finally earned enough money to marry Martha Bernays in September 1886. The couple moved into an apartment in a middle-class neighborhood in the heart of Vienna. Their first child, Mathilde, was born in 1887, followed by three sons and two daughters over the next eight years. Freud began to receive referrals from other physicians to treat their most challenging patients hysterics who did not improve with treatment. Freud used hypnosis with these patients and encouraged them to talk about past events in their lives. He dutifully wrote down all that he learned from them traumatic memories, as well as their dreams and fantasies. One of Freuds most important mentors during this time was Viennese physician Josef Breuer. Through Breuer, Freud learned about a patient whose case had an enormous influence upon Freud and the development of his theories. Anna O (real name Bertha Pappenheim) was the pseudonym of one of Breuers hysteria patients who had proved especially difficult to treat. She suffered from numerous physical complaints, including arm paralysis, dizziness, and temporary deafness. Breuer treated Anna by using what the patient herself called the talking cure. She and Breuer were able to trace a particular symptom back to an actual event in her life that might have triggered it. In talking about the experience, Anna found that she felt a sense of relief, leading to a diminishment or even the disappearance of a symptom. Thus, Anna O became the first patient to have undergone psychoanalysis, a term coined by Freud himself. The Unconscious Inspired by the case of Anna O, Freud incorporated the talking cure into his own practice. Before long, he did away with the hypnosis aspect, focusing instead upon listening to his patients and asking them questions. Later, he asked fewer questions, allowing his patients to talk about whatever came to mind, a method known as free association. As always, Freud kept meticulous notes on everything his patients said, referring to such documentation as a case study. He considered this his scientific data. As Freud gained experience as a psychoanalyst, he developed a concept of the human mind as an iceberg, noting that a major portion of the mind the part that lacked awareness existed under the surface of the water. He referred to this as the â€Å"unconscious.† Other early psychologists of the day held a similar belief, but Freud was the first to attempt to systematically study the unconscious in a scientific way. Freuds theory that humans are not aware of all of their own thoughts, and might often act upon unconscious motives was considered a radical one in its time. His ideas were not well-received by other physicians because he could not unequivocally prove them. In an effort to explain his theories, Freud co-authored Studies in Hysteria with Breuer in 1895. The book did not sell well, but Freud was undeterred. He was certain that he had uncovered a great secret about the human mind. (Many people now commonly use the term Freudian slip to refer to a verbal mistake that potentially reveals an unconscious thought or belief.) The Analysts Couch Freud conducted his hour-long psychoanalytic sessions in a separate apartment located in his familys apartment building at Berggasse 19 (now a museum). It was his office for nearly half a century. The cluttered room was filled with books, paintings, and small sculptures. At its center was a horsehair sofa, upon which Freuds patients reclined while they talked to the doctor, who sat in a chair, out of view. (Freud believed that his patients would speak more freely if they were not looking directly at him.) He maintained a neutrality, never passing judgment or offering suggestions. The main goal of therapy, Freud believed, was to bring the patients repressed thoughts and memories to a conscious level, where they could be acknowledged and addressed. For many of his patients, the treatment was a success; thus inspiring them to refer their friends to Freud. As his reputation grew by word of mouth, Freud was able to charge more for his sessions. He worked up to 16 hours a day as his list of clientele expanded. Self-Analysis and the Oedipus Complex After the 1896 death of his 80-year-old father, Freud felt compelled to learn more about his own psyche. He decided to psychoanalyze himself, setting aside a portion of each day to examine his own memories and dreams, beginning with his early childhood. During these sessions, Freud developed his theory of the Oedipal complex (named for the Greek tragedy), in which he proposed that all young boys are attracted to their mothers and view their fathers as rivals. As a normal child matured, he would grow away from his mother. Freud described a similar scenario for fathers and daughters, calling it the Electra complex (also from Greek mythology). Freud also came up with the controversial concept of penis envy, in which he touted the male gender as the ideal. He believed that every girl harbored a deep wish to be a male. Only when a girl renounced her wish to be a male (and her attraction to her father) could she identify with the female gender. Many subsequent psychoanalysts rejected that notion. The Interpretation of Dreams Freuds fascination with dreams was also stimulated during his self-analysis. Convinced that dreams shed light upon unconscious feelings and desires, Freud began an analysis of his own dreams and those of his family and patients. He determined that dreams were an expression of repressed wishes and thus could be analyzed in terms of their symbolism. Freud published the groundbreaking study The Interpretation of Dreams in 1900. Although he received some favorable reviews, Freud was disappointed by sluggish sales and the overall tepid response to the book. However, as Freud became better known, several more editions had to be printed to keep up with popular demand. Freud soon gained a small following of students of psychology, which included Carl Jung, among others who later became prominent. The group of men met weekly for discussions at Freuds apartment. As they grew in number and influence, the men came to call themselves the Vienna Psychoanalytic Society. The Society held the first international psychoanalytic conference in 1908. Over the years, Freud, who had a tendency to be unyielding and combative, eventually broke off communication with nearly all of the men. Freud and Jung Freud maintained a close relationship with Carl Jung, a Swiss psychologist who embraced many of Freuds theories. When Freud was invited to speak at Clark University in Massachusetts in 1909, he asked Jung to accompany him. Unfortunately, their relationship suffered from the stresses of the trip. Freud did not acclimate well to being in an unfamiliar environment and became moody and difficult. Nonetheless, Freuds speech at Clark was quite successful. He impressed several prominent American physicians, convincing them of the merits of psychoanalysis. Freuds thorough, well-written case studies, with compelling titles such as The Rat Boy, also received praise. Freuds fame grew exponentially following his trip to the United States. At 53, he felt that his work was finally receiving the attention it deserved. Freuds methods, once considered highly unconventional, were now deemed accepted practice. Carl Jung, however, increasingly questioned Freuds ideas. Jung didnt agree that all mental illness originated in childhood trauma, nor did he believe that a mother was an object of her sons desire. Yet Freud resisted any suggestion that he might be wrong. By 1913, Jung and Freud had severed all ties with one another. Jung developed his own theories and became a highly influential psychologist in his own right. Id, Ego, and Superego Following the assassination of Austrian archduke Franz Ferdinand in 1914, Austria-Hungary declared war on Serbia, thus drawing several other nations into the conflict which became World War I. Although the war had effectively put an end to the further development of psychoanalytic theory, Freud managed to stay busy and productive. He revised his previous concept of the structure of the human mind. Freud now proposed that the mind comprised three parts: the Id (the unconscious, impulsive portion that deals with urges and instinct), the Ego (the practical and rational decision-maker), and the Superego (an internal voice that determined right from wrong, a conscience of sorts).   During the war, Freud actually used this three-part theory to examine entire countries. At the end of World War I, Freuds psychoanalytic theory unexpectedly gained a wider following. Many veterans returned from battle with emotional problems. Initially termed shell shock, the condition resulted from psychological trauma experienced on the battlefield. Desperate to help these men, doctors employed Freuds talk therapy, encouraging the soldiers to describe their experiences. The therapy seemed to help in many instances, creating a renewed respect for Sigmund Freud. Later Years By the 1920s, Freud had become internationally known as an influential scholar and practitioner. He was proud of his youngest daughter, Anna, his greatest disciple, who distinguished herself as the founder of child psychoanalysis. In 1923, Freud was diagnosed with oral cancer, the consequence of decades of smoking cigars. He endured more than 30 surgeries, including the removal of part of his jaw. Although he suffered a great deal of pain, Freud refused to take painkillers, fearing that they might cloud his thinking. He continued to write, focusing more on his own philosophies and musings rather than the topic of psychology. As Adolf Hitler gained control throughout Europe in the mid-1930s, those Jews who were able to get out began to leave. Freuds friends tried to convince him to leave Vienna, but he resisted even when the Nazis occupied Austria. When the Gestapo briefly took Anna into custody, Freud finally realized it was no longer safe to stay. He was able to obtain exit visas for himself and his immediate family, and they fled to London in 1938. Sadly, four of Freuds sisters died in Nazi concentration camps. Freud lived only a year and a half after moving to London. As cancer advanced into his face, Freud could no longer tolerate the pain. With the help of a physician friend, Freud was given an intentional overdose of morphine and died on September 23, 1939 at the age of 83.

Saipo The Project Identity

Saipo The Project Identity Mission The mission of Saipo Company is to provide people in developing regions with the products of the soap recycling process because of the observed lack of inexpensive hygiene products in many countries globally. Thus, the practical goal of the company’s work is to cooperate with soap producers round the world to recycle the leftover or expired soap materials to distribute the products in developing countries.Advertising We will write a custom essay sample on Saipo The Project Identity specifically for you for only $16.05 $11/page Learn More Brand Value Saipo Company focuses on providing the unique products and services which are interesting not only for the potential customers as the product’s target audience but also for the company’s partners and shareholders because of expanding the possibilities for combining the elements of profitable and charitable activities. Combining the efforts of giant producers of soap and contributing t o the increase of shareholders’ gains, Saipo is the potentially most recognizable producer of soap in developing countries because of the products’ availability and social mission. The customers’ perception of the brand depends on the actual provision of inexpensive soap products in developing regions to determine the market and target audience of Saipo products. Saipo explores the new market segment with the help of effective strategies. The brand recognition as well as brand value can be discussed as depending significantly on orienting to innovation and creativity along with following the people-oriented culture and strategy. The demand for hygiene products globally affects the unique mission of Saipo Company which is the contribution to improvement of living conditions in developing regions while affecting availability of soap products. The Impact of Readings To work out the effective name for a new company, it is necessary to focus on the creative approach. The role of creativity in the project identity and product development is emphasized in the research by Brattstrom, Lofsten, and Richtner. Thus, the research’s results influenced the process of developing the name and the further focus on the effective mission statement because the authors presented the detailed description of the product development process (Brattstrom, Lofsten, and Richtner 744).Advertising Looking for essay on business economics? Let's see if we can help you! Get your first paper with 15% OFF Learn More Nevertheless, the development of a mission statement requires the concentration on the specific goals, functions, activities, and strategies followed and performed by the company. Paying attention to the research conducted by Cheung, Wong, and Lam, it is important to note that goal clarity and the focus on innovation along with creativity are the important factors to influence the brand’s success (Cheung, Wong, and Lam 690). That is why, these aspects should be taken into consideration while developing the effective mission statement. To develop the points associated with brand value, it is necessary to refer to the elements of the company’s organizational structure, culture, and performance in order to distinguish the aspects which contribute to the company’s uniqueness. The article by Cheung, Wong, and Lam and the research by Rauniar and Rawski are important to answer the questions about the Saipo Company’s mission, goal, and particular features of the enterprise’s performance with orienting to the profitable and charitable activities (Cheung, Wong, and Lam 690-691; Rauniar and Rawski 939). The readings on the aspects of the project development and specific organizational structures of companies to succeed within the market and industry are useful to decide what details should be accentuated in the mission and brand value statements to attract the target audience and poten tial investors. Brattstrom, Anna, Hans Lofsten, and Anders Richtner. â€Å"Creativity, Trust and Systematic Processes in Product Development†. Research Policy 41.1 (2012): 743-755. Print. Cheung, Sai On, Peter Wong, and Anna Lam. â€Å"An Investigation of the Relationship between Organizational Culture and the Performance of Construction Organizations†. Journal of Business Economics and Management 13.4 (2012): 688-704. Print.Advertising We will write a custom essay sample on Saipo The Project Identity specifically for you for only $16.05 $11/page Learn More Rauniar, Rupak and Greg Rawski. â€Å"Organizational Structuring and Project Team Structuring in Integrated Product Development Project†. International Journal of Production Economics 135.1 (2012): 939-952. Print.

Anxiety Disorder What Student Should Know

Anxiety Disorder What Student Should Know Mental Health Issues. Anxiety Stress and anxiety are a common part of life for most people. However, when your anxiety impedes your ability to perform everyday activities and causes immense stress and fear, probably you have a mental disorder. According to the Anxiety and Depression Association of America, it is the most common mental issue that affects 40 million individuals aged over 18. 75% of them experience it before they turn 22. Unfortunately, only one-third of these people seek help. Specialists know about different types of anxiety disorders, such as:Generalized anxiety disorder (GAD): severe one that impedes everyday activities Obsessive-compulsive disorder (OCD): irrational fears, thoughts, and obsessions that result in compulsions and repetitive behaviors Panic disorder: fearfulness, frequent bouts of panic and terror Posttraumatic stress disorder (PTSD): alarming symptoms after witnessing a shocking event Social anxiety disorder (SAD): everyday feelings of irrational fear, anxiety, and embarrassmentSymptoms Symptoms of all types of anxiety disorders can be mistaken for stress or other physical ailments. In order to treat them properly, these disorders have to be diagnosed correctly. The common symptoms of anxiety disorders that need attention of a specialist include:Excessive everyday stress Trouble concentrating Fearfulness Irritability Shortness of breath Muscle pains Headaches Frequent diarrhea or upset stomachIn case you regularly experience these symptoms, you should see a specialist in your campus. They will determine how serious is your anxiety and assign a treatment, if necessary. Recognizing The Signs Its essential to timely recognize the symptoms of anxiety in yourself or your friend to implement actions and treat it. Remember: in case your or your friends anxious feelings are brief and occasional, it doesnt necessarily mean an ailment. But if they persist and worsen, the professional help is required. How to Notice Signs of an Anxiety Disorder in a Friend? See if your friend has any of the following signs:Living in a constant fear of failing socially or academically Being extremely anxious and embarrassed in social situations Having difficulty with concentrating Being overwhelmed with stress or guilt Having panic attacks Being unable to cope with a recent tragic eventIn case you see any of these symptoms in your friend, provide him with your support. Talk to him, listen attentively and help find professional assistance. Never criticize or judge him. If your friend doesnt want to seek treatment, consult a specialist yourself to see how you can help. How Do You Notice Signs of an Anxiety Disorder in Yourself? If your anxiety is minor and caused by your exams, probably you dont have to worry. But you have to distinguish the difference and correctly detect the alarming symptoms, such as:Having the symptoms that impede your school and social life Avoiding social activities Having anxiety or troublesome thoughts daily Being riddled with guilt Having irrational fears Experiencing sudden panic attacksIn case you have any of the above mentioned signs, dont hesitate to consult a healthcare provider. Remember that you have to be serious about your mental wellness. Anxiety Resources People who need help in coping with their anxiety disorder might consider the assistance provided by the following organizations:Anxiety and Depression Association of America aims to prevent, treat, and help better understand anxiety and depression; offers special mobile applications for coping with the disorder American Psychological Association aims to benefit society by contributing to the psychological awareness and giving insight into the innovative treatment of anxiety disorders Anxiety Resource Center offers a blog, a large amount of education materials and newsletters to keep you aware of innovations in treatment and prevention of anxiety Social Anxiety Association provides information on the treatment of anxiety, advice on finding a specialist, updates on relevant researches and links to support groups Beyond OCD aims to support individuals who suffer from OCDPersistent anxiety can be an alarming sign. So pay attention to yourself and your friends to get timely help. Remember that your mental health is in your hands.

Limiting Financial Executives' Compensation Term Paper

Limiting Financial Executives' Compensation - Term Paper Example While the financial innovations helped the stock markets grow at a whopping pace in the 1990s and early 2000s, they also brought about a false euphoria and when the bubble burst, the current slowdown was imminent. The 1980s heralded many changes in the banking and securities exchange sectors the world over. It was an era of deregulations and free flow of currency.Due to changes in policies related to the stock market like bond trading, invention of securitization, interest-rate swaps, and credit-default swaps, bankers could increasingly make huge profits in the stock markets in the past two -three decades. Financial services also benefitted from higher investments made in securities by the increasingly wealthy population, encouraged by the IRA and 401 (k) plan. With everyone making money, there seemed to be clout surrounding the financial experts, and the growth of private banks was considered synonymous with economic growth. According to Simon Johnson, "the great wealth that the financial sector created and concentrated gave bankers enormous political weight-a weight not seen in the U.S. since the era of J.P. Morgan (the man)." In the same article, the chart showing the percentage of financial industry's profits as a share of U.S business profits indicates a slow increase fr

Leadership paper 2 Essay Example | Topics and Well Written Essays - 2000 words

Leadership paper 2 - Essay Example The personal life, challenges and opportunities also affect the professional life, vision and career development. The personal challenges that I face involve lack of time for the family members and inappropriate time to socialize and active participation in physical and mental activities. These challenges that I face, due to tight schedule of my job and my undue precedence to the professional career, are disrupting my personal life. Unstable personal life affects the professional career badly and hence, before going any further in the development of my professional life I would need to resolve the personal life issues keeping the professional values and visions under consideration. My Values: Basing the discussion on the LPI feedback, the most important trait according to my leadership skills is to treat others with dignity and respect. Employees working under my control, hence, are encouraged to put forward their ideas without any fear of embarrassment or humiliating behavior from t he management side including me. My values involve firm commitment and fulfillment of my promises which act as a modeling behavior for the employees. Employees spend more time observing the leaders’ behavior on how he/she acts in certain circumstances and respond to the commitments. A responsive, more responsible and committed leader inspires the visions and actions of the taskforce. I also believe in developing a cooperative environment where workers are encouraged to ponder over different issues, share their thoughts and implement the change. The fact that their ideas and views are respected and implemented if they are appropriate, integrate them more in the organization and they feel more relaxed and satisfied with the working environment. This leadership trait also enables the workers to trust the leader, act upon his decisions and understand the underlying factors of the decision which are beneficial for the firm and/or the performance of the group. My leadership values include the communication about group aspirations often in the daily working environment. This enables the employees keep their focus on achieving the group goals rather than achieving individual targets which collides with the group targets. Hence, proper communication of the targets and motivation to achieve them as a group helps achieving those targets by inspiring the group members’ vision and point of views about the work delegated to them. The LPI also suggests that seeking challenging opportunities to test and polish skills is also one of the traits that I adopt as a leader. Challenges and adverse situations enable the person think critically, evaluate, assess and implement. The challenging tasks and situations help making the group more integrated and devoted. The whole group is equally involved in tackling the difficult situation, hence creating a more firm and goal oriented taskforce. This further helps in realizing the true potentials of the group members and their involvement and interest in achieving the group goals. In addition to this, my values involve proper assessment of the group progress and communicate the results with the group to encourage them on improvement and discourage the traits which may hinder the success of the

Business Analytics Coursework Example | Topics and Well Written Essays - 1500 words

Business Analytics - Coursework Example From SPSS’s output on table 1 under Appendix A, the number of respondents that took part in the survey are 332 using varying scales to code their responses. For the word of mouth (WOM), the minimum and maximum values for testing included 1 and 7 respectively while that of trust and attitude was 1 & 7 and 1 & 9 respectively. However, for the age and monthly income, it shows that the minimum age of the participants was 18 years and the maximum was 72 years while the minimum and maximum monthly income was 400 and 10000 respectively. The mean for word of mouth, trust, and attitude is 3.34, 3.35, and 5.12 respectively indicating that the responses were not skewed to the left or the right. This situation shows that respondents showed almost equal distribution around very high and very low account of WOM, trust, and attitudes. The mean age for the respondents was 35.10 year coupled with a standard deviation from the mean of  ±13.898 (14 years). Lastly, the mean and standard deviati on from the mean for monthly income for the respondents is $1893.07 and $1355.696 respectively. With relation to regression analysis, table 3 under Appendix B shows the r-squared value of 0.183 with an adjusted value of 0.170. This means that monthly income, trust, age, attitude, and word of mouth have a low correlation of 18.3% with an adjusted correlation of 17%. Under R-Squared, this values show that the benchmark expectation and the output do not correlate effectively and therefore, the tested variables do not move in the same direction do not respond to the benchmark values (see full SPSS output under Appendix B). The interpretation of the output considered the regressions predictor which shows the differences in response per unit. The total responses and the respondents are 332 which in relation to the output, the constant shows the valid number of responses. This, in addition,

Global Inequality and Development Essay Example | Topics and Well Written Essays - 2250 words

Global Inequality and Development - Essay Example Different schools of thought emerged since time immemorial to explain the various perspectives and viewpoints that help us in the in-depth analysis of the occurrence of such diversities. The works of various prominent scholars continue to influence the various stand points that individuals might take to help in understanding disturbing issues why other nations are much more developed than others, many of the nations particularly developing nations continue to lag behind in terms of development and are faced with abject poverty that limits their capacity to achieve full development (Giddens, 1978, 65, 119). These perceptions also try to explain the relationship that exists between underdeveloped nations and these nations that have taken an enormous leap in terms of social, political and economic advancements and the instruments that they employ to maintain this status quo and inhibit other nations from achieving this aspired level of social, political and economic stability. ... Various theoretical perceptions emerged to help explain the nagging question of poverty and its relationship to development. However, these theories tended to different issues and were nearly the same in the theoretical traditions that strengthened this association. The most common classical theories include theories put forward by Karl Marx, Marx Weber and David Durheim. Even if they have similar family tree, these theories clashed for dominance. Every scholar preferred his theory as the best for social theory analysis. Marx Weber advanced his conjecture of weberianism, which led to the arrangement of the society into social stratifications. He studied this division using three dimensions namely economic class, social status and political power. The economic class was associated with the goods and services and amount of income that an individual owned, the social status was associated with the amount of respect that an individual enjoyed while the political power represented the amo unt of influence that an individual exercised. The dimensions of social stratification were interrelated with political power being the determinant of the economic class and social status that an individual enjoyed. His theory recognized the legal order and emphasized it never guaranteed the three dimensions of stratification but only acted as a means to realize massive powers necessary to ensure economic and social success (Giddens, 1978, 119). The economy was viewed as a peaceful means of exercising power of control to ease the acquisition of goods and services. This would later lead to the rise of state monopolies that were precursors of capitalism. This atmosphere created room for unfair competition between holders and non holders of power in the scramble to

Read-only Participants Article Example | Topics and Well Written Essays - 750 words

Read-only Participants - Article Example From the report it is clear that some of the researches that show the indispensable nature of constant communication when undertaking online modules. As such, the study concluded that professors and facilitators who participates and interacts with online scholars prevent them from frustrations and abandoning their course. Additionally, better cognitive results occur when learners engage and form an implicit community of learners. The growth of a community majorly depends on online interaction with their facilitator and peers. Learner perseverance, satisfaction, and cognitive outcomes characterize the creation of a virtual learning community. As the essay stresses modules requiring discussion forums permit a studious proactive contact with the professor and fellow scholars. In this case, this kind of learning enriches and facilitates the online teaching and learning environment by generating queries and replies of elevated critical thinking skills. The article, furthermore, identifies the third feature that we must regard when improving communication skills during online courses forums. In this, creating rapport and wholesome interaction enhances the online learning environment. This leads to a supportive interaction that provides substantial feedbacks to the questions formulated by instructors and fellow scholars. The article points out serious repercussions due to lack of effective communication within the online section. In this case, the research indicates the module completion of the module will face challenges that will bring down the grade.

The key factors influence the success of an international strategic Essay

The key factors influence the success of an international strategic alliance - Essay Example Unlike other kinds of associations such as mergers and acquisitions, company hierarchy frequently times allows for evaluation after entering into such deals. More often, when strategic alliance performance does not constitute monetary gains but merely other benefits, this proves hard to quantify as success it is based upon intangible criterion rather than stable financial growth procedures. Alliance goals and objectives from case studies often fluctuate considerably from the originally penned down deals and as such more difficult to define. These shortcomings are merely challenges and if handled effectively they will result in the success of an alliance; however, the four key factors are primal to success of any alliance. Introduction Rakowski and Patz (2009, p.5) defines Strategic alliance as a cooperative arrangement between two or more companies to achieve a shared goals, so that each reimbursements from the powers of the other, and gains reasonable lead. Most literature identifie s two categories of strategic alliances; those that are equity based and the non-equity based. Those that are based on equity include minority stock investments, joint ventures, to the furthest end majority investments. However, the non-equity based alliances are purely based on contractual agreements that spell out the relationships between the parties. In these arrangements the different parties to such agreements do not lose their independence and their autonomy with the regards to operations, however, the alliance do have an impact on their operations (Singh and Delios 2012, p.196). The emergence of strategic alliances has been seen as a reaction to globalization Vaidya (2006, p.256) insist that it is one of the most significant impacts of globalisation in the last 3 and a half decade coupled with the integration of markets and the increasing uncertainty and complexity in the business environment. Strategic alliances entail sharing of techniques and knowledge between parties inv olved plus schemes that involve the decrease of risks and expenses in areas such as relationships with suppliers and the development of new products and technologies. Strategic alliance has often been discussed within the realms of a joint venture, as it at times involves rivals, however more often it has a shorter lifespan than the former. Strategic partnership is a closely related concept, this paper explores the key factors influencing the success of international strategic alliances, through a two case study analysis. It is often stated that to understand the key reasons of the success, then it is imperative to grasp the rationale behind strategic alliances. The paper unearths that success depends on the levels of trust, communication, commitment and collaboration deciphering between the parties. For these factors above to flow seamlessly, the parties to the strategic alliance must have a fit with respect to alliance goals and objectives (Cullen and Parboteeah2013, p.315) its me chanics of operation and the performance evaluation criteria. Ogbor (2009, p.372) asserts that any company willing to enter into alliance with another party must look out for compatible goals; and complimentary capabilities. Globalization and Strategic Alliance With the proliferation of globalization and incorporation of markets into an international market,

Global Inequality and Development Essay Example | Topics and Well Written Essays - 2250 words

Global Inequality and Development - Essay Example Different schools of thought emerged since time immemorial to explain the various perspectives and viewpoints that help us in the in-depth analysis of the occurrence of such diversities. The works of various prominent scholars continue to influence the various stand points that individuals might take to help in understanding disturbing issues why other nations are much more developed than others, many of the nations particularly developing nations continue to lag behind in terms of development and are faced with abject poverty that limits their capacity to achieve full development (Giddens, 1978, 65, 119). These perceptions also try to explain the relationship that exists between underdeveloped nations and these nations that have taken an enormous leap in terms of social, political and economic advancements and the instruments that they employ to maintain this status quo and inhibit other nations from achieving this aspired level of social, political and economic stability. ... Various theoretical perceptions emerged to help explain the nagging question of poverty and its relationship to development. However, these theories tended to different issues and were nearly the same in the theoretical traditions that strengthened this association. The most common classical theories include theories put forward by Karl Marx, Marx Weber and David Durheim. Even if they have similar family tree, these theories clashed for dominance. Every scholar preferred his theory as the best for social theory analysis. Marx Weber advanced his conjecture of weberianism, which led to the arrangement of the society into social stratifications. He studied this division using three dimensions namely economic class, social status and political power. The economic class was associated with the goods and services and amount of income that an individual owned, the social status was associated with the amount of respect that an individual enjoyed while the political power represented the amo unt of influence that an individual exercised. The dimensions of social stratification were interrelated with political power being the determinant of the economic class and social status that an individual enjoyed. His theory recognized the legal order and emphasized it never guaranteed the three dimensions of stratification but only acted as a means to realize massive powers necessary to ensure economic and social success (Giddens, 1978, 119). The economy was viewed as a peaceful means of exercising power of control to ease the acquisition of goods and services. This would later lead to the rise of state monopolies that were precursors of capitalism. This atmosphere created room for unfair competition between holders and non holders of power in the scramble to

The key factors influence the success of an international strategic Essay

The key factors influence the success of an international strategic alliance - Essay Example Unlike other kinds of associations such as mergers and acquisitions, company hierarchy frequently times allows for evaluation after entering into such deals. More often, when strategic alliance performance does not constitute monetary gains but merely other benefits, this proves hard to quantify as success it is based upon intangible criterion rather than stable financial growth procedures. Alliance goals and objectives from case studies often fluctuate considerably from the originally penned down deals and as such more difficult to define. These shortcomings are merely challenges and if handled effectively they will result in the success of an alliance; however, the four key factors are primal to success of any alliance. Introduction Rakowski and Patz (2009, p.5) defines Strategic alliance as a cooperative arrangement between two or more companies to achieve a shared goals, so that each reimbursements from the powers of the other, and gains reasonable lead. Most literature identifie s two categories of strategic alliances; those that are equity based and the non-equity based. Those that are based on equity include minority stock investments, joint ventures, to the furthest end majority investments. However, the non-equity based alliances are purely based on contractual agreements that spell out the relationships between the parties. In these arrangements the different parties to such agreements do not lose their independence and their autonomy with the regards to operations, however, the alliance do have an impact on their operations (Singh and Delios 2012, p.196). The emergence of strategic alliances has been seen as a reaction to globalization Vaidya (2006, p.256) insist that it is one of the most significant impacts of globalisation in the last 3 and a half decade coupled with the integration of markets and the increasing uncertainty and complexity in the business environment. Strategic alliances entail sharing of techniques and knowledge between parties inv olved plus schemes that involve the decrease of risks and expenses in areas such as relationships with suppliers and the development of new products and technologies. Strategic alliance has often been discussed within the realms of a joint venture, as it at times involves rivals, however more often it has a shorter lifespan than the former. Strategic partnership is a closely related concept, this paper explores the key factors influencing the success of international strategic alliances, through a two case study analysis. It is often stated that to understand the key reasons of the success, then it is imperative to grasp the rationale behind strategic alliances. The paper unearths that success depends on the levels of trust, communication, commitment and collaboration deciphering between the parties. For these factors above to flow seamlessly, the parties to the strategic alliance must have a fit with respect to alliance goals and objectives (Cullen and Parboteeah2013, p.315) its me chanics of operation and the performance evaluation criteria. Ogbor (2009, p.372) asserts that any company willing to enter into alliance with another party must look out for compatible goals; and complimentary capabilities. Globalization and Strategic Alliance With the proliferation of globalization and incorporation of markets into an international market,

Memory Boy Essay Essay Example for Free

Memory Boy Essay Essay The book that I choose to read this 9 week period is called Memory by Will Weaver. The book is based on the lives of a family of 4 people; Miles, Sarah, and their two parents. Memory Boy starts out in the Mid West after a mountain range in Washington erupts and spews ash what seems billions of feet up, and over the entire United Sates like a blanket. The ash is so thick that people have to wear dust masks outside to avoid the risk of breathing it in. Miles and his family finally decide to leave the town that they live in to head northwest. Since the ash is so heavy they can’t drive a car because those are restricted, and people can only use them on certain days to avoid the problem of pollution. So Miles assembles a new vehicle that he calls the Princess. It is a mix between a bicycle and a boat that they must pilot by either peddling, or when there is enough wind they have a sail from a boat to put up. They decide to leave under the curtain of night to avoid being detected by other people who would want to take their vehicle from them. As they make their way North they must face encounters with many obstacles such as road blocks, bandits, hunger, the government, nature, each other, and other hazards. In between telling us about they’re adventure north, Miles, who is the main character tells us the events leading up to their departure, starting with the day that the eruption happened. The novel starts out a peaceful journey by the family but they soon learn that their trip will not be easy and they must work together to survive. Miles is our main character and we watch all the events happen through his point of view. He would be a junior in high school if they still actually went to school. Miles is a smart individual who enjoys doing the job of a mechanic. He built the Princess by himself and is the only one who is about to fix and maintain it throughout the book. He takes a strong leadership role; even his parents look to him to solve the solutions. When the volcano erupted he was only in the 9th grade. So every other chapter he will flashback to his 9th grade year to tell us a story about after the volcano erupted. He often compares his life now to that of his 9th grade year, and how he would have done things different. He used to be disrespectful and would often act out in school to seek attention. He will explain to us how some of the events he tells us about have changed him. Miles sister Sarah is a few years younger than he is. She is a dark and morbid girl; the type that is into vampire, dark music, and dark literature. But even though she seems tough on the outside, but she is actually just hiding how scared she has been throughout this entire ordeal. She secretly looks up to miles even though she would never say so to him. She doesn’t like her father very much because he was always away when she was a child. Miles’s father was a jazz musician in a band before the eruption. He was always on the road with his band, so he wasn’t around much when Miles and Sarah were growing up. Although he seems quite docile at the beginning of the book we soon learn that he is actually quite the leader, and when Miles gets overwhelmed his father is always there to take the lead for awhile. Miles’s mother was the main caretaker of the children so she was always around. At the beginning of the book she kept the family together as a unit, they referred to her as being. The children see their mother as being helpless most of the time. It isn’t until later in the book that she really blooms as a character, and becomes a very useful asset to the group.

Carbon Nanotubes for Nano-particle Field Extraction Thruster

Carbon Nanotubes for Nano-particle Field Extraction Thruster Using carbon nanotubes as propellant for nano-particle field extraction thrusters Stefan Seuleanu Introduction Carbon nanotubes have been a research focus for more than two decades due to their unique physical properties and have been used so far in a variety of appli- cations. A possible application of carbon nanotubes is their use as propellant for an electric propulsion prototype, the nano-particle field extraction thruster (nanoFET). The nanoFET accelerates and ejects conductive particles in order to provide thrust1 . Its main advantage over other electric propulsion systems, such as ion or arcjet thrusters, is its variable specific impulse and thrust, while maintaining a high internal efficiency1 . Theoretically, the nanoFET propulsion system can be used for a large range of orbital and deep space exploration sit- uations, offering the possibility of decoupling the spacecraft design from the propulsion system4 . However, to date, nanoFETs have not been researched ex- tensively and much of the experimental work is still to be expected. This paper will investigate the possibility of using carbon nanotubes as nanoFET propel- lant by considering their relevant physical properties. By understanding how the nano-particle field extraction thruster works,this account also motivates the use of carbon nanotubes as propellant, despite their current high price. Properties and characteristics of CNTs Firstly, it is important to understand the relevant characteristics that make CNTs desirable for the nanoFET propulsion system. A carbon nanotube is a tubular/cylindrical structure that can be visualized as a wrapped sheet of graphene (one atom thick, two dimensional carbon based hexagonal lattice). Their size is typically a couple of nanometers in diameter and can span many micrometers in length. Carbon nanotubes can be single-walled (SWNTs) or multi-walled (MWNTs). These two characteristics will determine their aspect ratio (ratio between length and diameter), which is generally very high. As will be explained later on, the aspect ratio is a determinant factor that influences the nanoFET performance2,3 . The geometric structure of the nanotube determines its electrical properties. Based on the chiral vector (n,m), illustrated below, there are three main types of CNTs: zigzag, armchair and chiral. When n − m is a multiple of three, then the CNT is metallic, and semiconducting otherwise. Due to their geometry, armchair CNTs are always metallic, while the other types can be metallic only with the right choice of (n,m). Because there is no exact way to synthesize carbon nanotubes of only one geometry, as expected, generally one third of the synthesized CNTs are metallic and the rest are semiconducting 2,3 . Figure 1: CNT type depends on the chiral vector2 . Regarding the nanoFETs, the desired CNTs are the metallic type which implies the necessity for prior sorting before use. Moreover, the synthesized CNTs can contain geometrical †defects† that can be manipulated to improve the thruster’s performance3 . Due to the fact that the CNTs’ structure/geometry minimizes the collisions between conducting electrons, the resulting metallic tubes are highly conductive. Another characteristic is determined by the strong carbon bonds that allow high current to flow at low resistivity. This properties will become relevant when explaining the charging stage of the nanoFET 2,3 . The stages of a nanoFET The acceleration of a particle by a nanoFET can be divided into several stages. By assuming that the particles have been already sorted for the desired thrust, the first stage is the transportation of the particles to the charging pad. The transportation of the particles can be achieved either trough a dielectric fluid or through back pressure, hence the difference between wet nanoFETs and dry nanoFETs. For the purpose of this paper only the wet nanoFETs will be con- sidered, as the research done into dry nanoFETs has so far been minimal. The transportation liquid used for the proof-of-concept tests was silicon oil. After the particle is transported to the charging pad, the next stage is the charging process . Here the conductive particle is electrostatically charged to a desired level 5,6,8 . Figure 2: Single nanoFET emission channel cross section5 The next phase is the lift-off and extraction, which represents the application of an electric field, a potential bias between the electrode and the acceleration gates, such that the particle leaves the charging pad and moves upwards towards the liquid’s surface. At the surface, the particle must overcome the surface tension and get extracted from the liquid. After the extraction, the next stage is the acceleration of the particle trough several stacked gates. The gates have alternating insulating and conductive layers, each providing in theory an electric potential of 1000V, leading to a total of 10,000V potential that accelerates a particle to approximately 10km/s. The particle is finally ejected out of the nanoFET and thrust is produced5,6,7 . Particle behavior in nanoFETs In order to understand the behavior of the particle in a gravitational setting compared to a micro-gravitational setting, it is important to identify the forces that act on the particle at different stages in the nanoFET. The four main forces acting on a particle in a gravitational setting are the electrostatic force, the buoyant force, gravitational force and the drag force. As the cylindrical particle is transported to the charging pad, the liquid provides a horizontal inertial force. This horizontal inertial force is assumed to be low and therefore ignored in the calculations. After the nanoparticles are transported to the charging pad (electrode), they are electrostatically charged; thus contact with the electrode is necessary. If the contact is horizontal, along the length, then the charge of the particle is described by6 .: q0,cy−h = 2Ï€rlÃŽ µl El However if the contact is at either ends, so the particle is vertical on the electrode, the charge is the following6 .: l2 q0,cy−v = Ï€ ln( 2l ÃŽ µl El When the cylindrical particle is vertical on the charging pad, it gains more charge and it also requires less electric field to move upwards, as seen in the figure below6 . Figure 3: Vertically vs horizontal oriented particles a) ratio of acquired particle charge; b) ratio of required lift-off electric field6 In order to orient a particle from horizontal to vertical on the charging pad, an intense electric field focused only at one of the particle’s ends is applied. The fabrication defects that are usually present at the ends of CNTs may help to change the orientation of the particle on the electrode, requiring less electric field to create a moment that rotates the CNTs vertically. Additionally to the gravitational force, while still on the charging pad, the particle has to overcome the adhesion and electric image force in order to achieve vertical lift-off5,6 . After the particle leaves the charging pad, it has to move vertically trough the viscous liquid to the liquid surface. Therefore, the adhesion force and the electric image are no longer present; however the drag force now slows the particle’s movement. For a cylindrical particle the formula for the fluid drag used in the nanoFET calculations is given by6 : 2π µl lv D = ln( l ) + 0.193 While moving through the liquid, the particle loses charge as described by q(t) = q0 exp(− t ), where Ï„ = ÃŽ µl 5,6 . Because the particle moves fast through Ï„ ÏÆ'l the liquid, the charged loss is overall assumed to be negligible. Generally, the particle’s equation of motion is described by6 : dv (mp + K ml ) dt = q(t)El − D + Fbuoyant − W. The above equation also takes in account the added mass that is accelerated with the particle where K is a coefficient that depends on the geometry of the particle, while mp is the mass of the particle and ml is the mass of the liquid. In a laboratory gravitational environment the gravitational forces are minimal compared to the dominant drag and electrostatic forces. In a micro-gravitational environment the gravitational force and the buoyant force can be neglected5,6 . Performance and particle size For characterizing the performance of the nanoFET electric propulsion system, the space industry uses specific impulse and thrust-to-power ratio as indica- tors of performance. The specific impulse is the impulse delivered per unit of propellant consumed. In order to achieve a certain thrust, the systems that have higher specific impulse consume less propellant than the ones with lower specific impulse. For the nanoFET system the specific impulse increases as the charge-to-mass ratio of the particle increases. Thurst-to-power ratio describes the amount of thrust outputted for a specific power provided4,6 . 1 q 1 T 2 mp 1 Isp = 0 (2Vo p ) 2 ; = ( ) 2 P Vo q Moreover, the internal efficiency is given by4,6 : 1 T ÃŽ ·int = 2 g0 P Isp There are several factors that can influence the performance or the mode of operation of the nanoFET. First of all, the horizontal inertial force that the particle gains from the transportation liquid is assumed to be negligible. How- ever, this is not necessarily the case and further research needs to be conducted in order to determine its influence. Another important factor is the presence of Taylor cones and surface instability when a high electric field is present near the liquid’s surface. These cones can eject droplets and reduce the performance of the nanoFET. In order to mitigate the surface instability and the ejection of droplets, an experiment has been done to analyze how different particle shapes influence the minimum electric field needed for the extraction process. The ex- periment consists of various vacuum electric fields applied to spherical 800 µm and cylindrical 300 µm diameter and 1.5mm length aluminium particles with a total silicon oil fluid gap of 12 .7mm. As seen in the figure below, cylindrical particles can be extracted before the Taylor cones form5,6,7, . Figure 4: Taylor cone formation and particle extraction6 Furthermore, further study into the charge-to-mass ratio revealed that, for cylindrical particles, charge-to-mass ratio increases as aspect ratio increases. Therefore, at large aspect ratios, the needed extraction electric field decreases as seen in the following figure. For this reason increasing the aspect ratio of the particles increases in turn the Isp and the overall internal efficiency6 . A good candidate for further research are the CNTs due to their cylindrical Figure 5: Cylindrical particles’ vacuum extraction field simulations6 shape, high aspect ratio, good charge-to-mass ratio and fast charging. By choos- ing different CNT sizes to be used with variable gate potentials, the nanoFETs’ Isp range is theoretically very large compared to other electric propulsion sys- tem such as ion thrusters or hall thrusters. Similarly, the thrust-to-power varies greatly, which offers the flexibility of using the same propulsion system for mul- tiple missions or to perform unplanned trajectory changes at a low propellant expense. These are theoretically achieved while maintaining a high internal efficiency that is usually above 85%. For the following CNTs: nanoFET par- ticle1 16nm diameter, 3 µm length; nanoFET particle2 4nm diameter, 3 µm length; nanoFET particle3 1nm diameter, 3 µm length, the expected Isp and Thrust-to-Power ratio is illustrated4,5 . Figure 6: Thrust-to-power ratio for large specific impulse range4 Figure 7: Internal efficiency for large specific impulse range4 Discussion Apart from the large specific impulse range at high internal efficiency that pro- vides great flexibility to design a multitude of mission phases based on just one propulsion system and to accommodate for unforeseen scenarios, the nanoFETs have other important advantages over other electric propulsion system, such as potential longer operational lifetime, their geometric scalability and the fact that the system is highly integrated. The longer operational lifetime is due to the fact that the CNT particles or any other conductive particles are charged electro- statically and not ionized which eliminates the need for cathodes and eliminates charge exchange collisions that are the main lifetime reduction factors5,6 . However, there are still a multitude of challenges ahead until a fully functional prototype will be achieved. First of all, the experiments done so far that demon- strated particle transportation, charging and lift-off were conducted using mi- crometer size particles such a s Aluminum, Titanium and Indium. Although theoretically the CNTs can greatly increase the performance, no nano-size par- ticles have been experimentally used so far. Experimenting at the nanoscale might sometime reveal new problems that were not present at the micron level. Also, it is generally desirable that a quantitative experimental analysis is done in order to understand how a multitude of particles with different character- istics perform. In this way it could be determined what particle shows the most promise, although CNTs have a strong theoretical advantage mainly due to their charge-to-mass ratio. Another important factor to investigate is how the charging process changes as the size of the particle decreases to the several nanometers; the main concerns being conductivity and the contact area with the electrode. Furthermore, an investigation should also be conducted regard- ing the transportation liquid. So far, it is uncertain if a fully dielectric liquid is always desired over a slightly conductive liquid. Moreover, different liquids should be tested in order to experimentally understand how the viscosity of the liquid influences the space charge current5,6,7,8 . Finally, from an academic point of view it would be desirable that both the theoretical and experimental papers are published in a peer-reviewed journal. Conclusion Overall, the nanoFET propulsion system shows great promise due to its high specific impulse range and inherent scalability. Although it is a new concept, the most important processes such as particle transportation and charging have been already demonstrated. However, there are still a multitude of experiments that need to be conducted in order to fully understand the behavior of the system under a wide range of factors. Another interesting prospect for the nanoFET technology is their possible use , not only in the space industry, but also in medicine. The nanoFET technology can also be used to accelerate particles and inject them through cellular walls to deliver drugs. For these reasons, the nanoFET technology is an exciting and potentially rewarding research subject. References 1. Gohardani O, Elola CM, Elizetxea C. 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Retrieved from: http://deepblue.lib.umich.edu/bitstream/handle/2027.42/76874/AIAA-2006-4803- 539.pdf ?sequence=1 on 1st of June 2015. 6. Liu TM, Musinski LD, et al. Theoretical Aspects of Nanoparticle Electric Propulsion. 2006. American Institute of Aeronautics and Astronautics.Retrieved from: http://pepl.engin.umich.edu/pdf/AIAA-2006-4335.pdf on on 1st of June 2015. 7. Liu TM, Musinski LD, et al. Developmental Progress of the Nanopar- ticle Field Extraction Thruster. 2008.American Institute of Aeronautics and Astronautics. Retrieved from: http://www.umich.edu/ peplweb/pdf/AIAA- 2008-5096.pdf on 1st of June 2015. 8. Liu TM, Musinski L, Gilchrist B, Gallimore A. Electrostatic charging of micro- and nano-particles for use with highly energetic applications. 2008. Elsevier. Journal of Electrostatics. doi:10.1016/j.elstat.2008.11.001