Jfet Characteristics Essays - Transistors, Biasing,

Jfet Characteristics JFET CHARACTERISTICS ENR 213 LAB # 5 FEBRUARY 15, 2001 Aaron Smith PURPOSE: The purpose of this lab is to design a voltage-divider bias BJT transistor configuration given specific circuit responses. The circuit specifications are as follows: VCC = 15V, IC = 5mA, VCE = 7.5V, and VE = .1VCC = 1.5V. PROCEDURE: The same procedure will be done twice, first with a 2N3904 transistor than with a 2N4401 transistor. Determine the value of RC and RE for the given specifications. Define the relationship between R1 and R2 assuming that RE * 10R2 is satisfied. Calculate R2 and pick the closest commercial value for your circuit. Then, plug the value of R2 into your derived relationship and solve for R1. Next, construct the circuit. Measure all voltages and calculate the currents. Then determine the value of . Compare your predicted values to the measured values. CONCLUSION: We defined the relationship between R1 and R2 to be 2.2R1 = 12.8R2. By doing so, we were able to find values for R1 and R2 which would yield the desired variables. When comparing our results for each transistor, we saw that an increasing value doesn't affect the voltages and currents much. Our values were 152 for the 2N3904 transistor and 176 for the 2N4401 transistor. For instance, our value of IC was 4.8mA for the 2N3904 transistor and 4.93mA for the 2N4401 transistor. We calculated the stability factor for our circuit to be 1.13. This further proved our predictions that does not have much impact on this type of configuration. Engineering

List of the Ten Least Visited National Parks

List of the Ten Least Visited National Parks The United States is home to 58 different national parks and over 300 units or areas such as national monuments and national seashores that are protected by the National Park Service. The first national park to come into existence in the U.S. was Yellowstone (located in Idaho, Montana and Wyoming) on March 1, 1872. Today, it is one of the most visited parks in the country. Other popular parks in the U.S. include Yosemite in California, the Grand Canyon in Arizona and the Great Smoky Mountains in Tennessee and North Carolina.Each of these parks sees millions of visitors each year. There are many other national parks in the U.S. however that receive far fewer annual visitors. The following is a list of the ten least visited national parks through August 2009. The list is arranged by the number of visitors in that year and begins with the least visited park in the U.S. Information was obtained from the Los Angeles Times article, Americas Hidden Gems: The 20-Least Crowded National Parks in 2009.1) Kobuk Valley National ParkNumber of Visitors: 1,250Location: Alaska2) National Park of American SamoaNumber of Visitors: 2,412Location: American Samoa3) Lake Clark National Park and PreserveNumber of Visitors: 4,134Location: Alaska4) Katmai National Park and PreserveNumber of Visitors: 4,535Location: Alaska5) Gates of the Arctic National Park and PreserveNumber of Visitors: 9,257Location: Alaska6) Isle Royale National ParkNumber of Visitors: 12,691Location: Michigan7) North Cascades National ParkNumber of Visitors: 13,759Location: Washington8) Wrangell-St. Elias National Park and PreserveNumber of Visitors: 53,274Location: Alaska9) Great Basin National ParkNumber of Visitors: 60,248Location: Nevada10) Congaree National ParkNumber of Visitors: 63,068Location: South CarolinaTo learn more about national parks, visit the official website of the National Park Service. References Ramos, Kelsey. (n.d.). Americas Hidden Gems: The 20 Least Crowded National Parks in 2009. Los Angeles Times. Retrieved from: latimes.com/travel/la-tr-national-parks-least-visited-pg,0,1882660.photogallery

Human Embryonic Stem Cell Research Essay Example | Topics and Well Written Essays - 2250 words

Human Embryonic Stem Cell Research - Essay Example On the other hand, hopeful patients wait for concrete results from different laboratory tests to confirm that it is indeed an answer to their ailment. The purpose of this paper is to give a brief background on some facts about the human embryonic stem cells. Particularly it will explore answers to the following questions: Each of us started as a single living cell that resulted from the union between a sperm and an egg. From this single cell, certain chronological events took place that eventually led to the development of different body parts. Cells increase in number and differentiated to many cell types until we reached and assumed a human form. Many doctors agree that this is a miracle of Science. On the other hand, some started to try and make this miracle happen in a petri dish for purposes of helping fertilization occur between couples wanting to have babies. Eventually, this simple experiment led to the discovery of another potential wonder that these dividing young cells could give. Thus, embryonic stem cells became a word of mouth in all scientific publications and journals. These cells are found in a 4-5 day old embryo. They have a unique capability to continuously divide that enables them to self-renew. ... Embryonic stem cells are also capable of differentiating and developing into many cell types such as brain, heart, liver, skin cells, etc upon instructions of biological signals (NIC 2006). Hence, they are also called pluripotent cells. History of Embryonic Stem Cell Research Embryonic Stem Cell Research began through the efforts of Gail Martin, Matthew Kaufman and Martin Evans when they derived mouse embryonic stem cells way back in 1981 (The White House 2001). However, the breakthrough happened in February 1998 when James A. Thomson of the University of Wisconsin and his team announced that they had successfully isolated and cultured the first human stem cell line derived from blastocytes. The team obtained these blastocytes left over from successful in-vitro fertilization procedures (Stem Cells Portal 2008). Thomson revealed that the obtained cells transformed into different types when it was injected under the mice's skin. Furthermore, there were also remnants of the fundamental mammalian embryo layers proving that these cells are also flexible during the course of their development. The results obtained from the study shed hope gearing towards finding a medical treatment for some diseases (Pedersen 1999). Just about the same time that year, another group of scientists were conducting experiments similar to that of Thomson. John D. Gearhart of Johns Hopkins University in Baltimore was also extracting and culturing the same cell types from human fetal ovaries and testes (Pedersen 1999). Other developments and laboratory experiments soon followed with the same aim of developing their own embryonic stem cell line. One major scientific development took place in May of 2003 when researchers announced that they have successfully

Role of social media for business Essay Example | Topics and Well Written Essays - 250 words

Role of social media for business - Essay Example All this information is of great value to websites that we visit. Social networks operate on the development of tools to help marketers reach their goals through a time where people spend a significant penalty of their time in the use of these sites as Facebook Twitter Instagram etc. To begin with, social media helps to know the target customers, such as data that put by them in Facebook, such as age, nationality, geographical location, educational attainment, and tastes in entertainment choices and brands Favorites. All of these data allows marketers to get close to their customers and more than enable companies marketing their products easily. An example of this is the oil companies, Apple, television channels, magazines and newspapers companies, perfumes, makeup health tools, medicines and slimming products. Moreover, Social networking sites help to improve the quality because it can compare each company between its products and products of other companies and read peoples opinions and comments on networking sites. For example comparisons between Smartphone companies like Apple and Samsung. Not only the major companies that will promote itself through social networking sites, but also ordinary people who have small businesses or working from inside their homes and who cannot afford to pay huge amounts of money for advertising about their companies or do not have sufficient funds to support their business, So social media is a very effective tool for them. To support this fact I would like to share my own example. Two years back I started working as freelancer for cake decoration. I did not have enough sources to run my freelancing work but at that time social media helped me to reach at the people and I generated so many customers online for me. I started promoting my work on Instagram I open an account and I added some photographs of

Asian American Analysis Article Example | Topics and Well Written Essays - 500 words

Asian American Analysis - Article Example Social Needs and Issues According to Sharon Lee: "As many Asian American studies scholars have pointed out, Asian Americans are depicted as model minorities but they are also portrayed as foreigners, disloyal to America," (2008, par 10) Lee further elaborates that: "Dual images of Asian Americans as model minorities, people to be praised and emulated and embraced, and foreign threats, people to be watched, monitored, and distrusted, have long been a part of U.S. history." (2008, par 11) How can Asian American students of the Chinese, Indian and South Korea origin reject these types of stereotypes without hurting their academic record It is nearly impossible. Many Asian American students feel that if they are going to break the stereotype, they should and will fail their classes. This will hopefully, in their minds, put them outside the mold and beyond the stereotype, and perhaps earn the trust of other classmates as well. This is something that a counselor and a school must keep in mind when realizing that Asian American failure rates are going up; a big inspiration for this problem is the desire to "fit in" with other students by "getting out" of their Asian American stereotypes.Another important item to consider is the fact that Asian American families generally want their children to be acculturated but not want them to be assimilated. Most of the parents speak their first language in the homes. Many of the parents are immigrants and may not speak English fluently. Therefore, this can cause concerns as far as fitting in and social norms are concerned. This means that these Asian American students may never feel fully accepted, nor may they ever be able to achieve full acceptance as their culture holds... From this study it is clear that the general stereotypes affect Asian Americans psychologically.   If they are not currently successful students, they may be too frightened to ask for help, thinking they will be rejected because of who they are, or ostracized by those within their own ethnic group.   This causes a threat for Asian American students that are failing, because intervention will be key; counselors must understand that these students will more than likely not ask for help.This paper stresses that  as far as education is concerned, there is a stereotype surrounding Asian Americans that puts quite a bit of pressure on their academic achievement.   Generally, Asian Americans of the Chinese, Indian and South Korean origin. are expected to perform well, and if they do not, they often feel very depressed and are embarrassed to ask for assistance.  Ã‚   According to Kim and Yeh: â€Å"Moreover, dispelling the Asian American universal academic success myth, the Educati onal Testing Service found that twelfth grade students from six major ethnic groups (Chinese, Japanese, Korean, Filipino, South Asian, and Southeast Asian) had significant variations in their educational backgrounds and achievement†.  ETS also demonstrated how stereotyping has led to the neglect of the development of student services and support for the many Asian American students who are undereducated and have low socioeconomic status†.

Risk Factors in Business

Risk Factors in Business 9.0 Critical Risk Factors 9.1 Management Risks Lack of Business Skills and Experience None of any business is going to be easy. Each business unit is inevitable to face challenges and risks. Being a ‘young’ partnership management team, our management team is lack of field experience and business relationship skill in managing our company. It is because there will have many uncertainty and problems arise along the business operation that five of entrepreneurs ourselves cannot predicted and failure handling. It is a significant weakness for a business management team who operate in the very early period. Conflict between Partners Conflict is another inevitable part of business life when there are incompatible issues happened between each other. Partners may have struggle due to different opinions while making the business decision. If unhealthy conflict continues unresolved or not eliminated for long period of time, partners are likely to left the management team or dissolve the partnership relationship. The effect of poor conflict management may give a negative impact on operations and difficulty in achieving the company vision and mission. 9.2 Marketing Risks Low Brand Recognition In this strong competition marketing, our company is threatened from the existing competitor. Theres no doubt for our company might face some obstacles such as the low brand recognition for our new innovation product. The customer might not familiar with our brand name of the product which might give us less appeal when customer making the relevance product purchasing decision. As compare to the competitor who has higher brand recognition, they have established a well reputation, larger capital, and superior customer’s data, skillful and knowledgeable in retain their customer loyalty than our company. Consumer may perceive risk and unfamiliar about our product. Hence, it is a challenging issue that our company needs to concern in choosing appropriate strategies to penetrate into the market. Market entry strategy Our products are considered as brand new product in Malaysia. Failure in selection of an appropriate pricing, marketing, or distribution strategy is a major potential risk. For example, with an inappropriate promotional strategy in ineffective way or wrong target audiences might lead to loss of potential customer and profits. Thus it is important in chosen media and channel to build customer awareness. Another reason is our competitors already have their existing customers and brand loyalty therefore the competitors are less likely to spend on advertising. However, our company is a new established firm and it needs to put more effort and spending in marketing campaign through promotion and advertising. This will lead to increment of expenses in running the business and thus reduce the competitiveness in other operation area. 9.3 Operating risks Employee lack of Experience, Knowledge and Skills Our company is lack of experienced workers in handling equipment and tools. As the equipment and tools have different use and function, thus workers may find it difficult to handle new equipment and tools which they are not familiar with. Hence, we may face difficulty in production process and operating management and it may increase our wasted resources. Lacking specific knowledge and skill are critical in all business process phases, and this problem can become the weakness of our company. Staffing management Supervisor is responsible in staffing. Sometimes, it is hard for them to control on employee behavior. Employees are likely to proposing complaint to management on different issues. New employees and workers possess less loyalty at the earlier stage of the business operation. The increase of sick leave or absenteeism may cause the shortage of manpower in which they are all hardly to find any replacement in shorter time. Except for the permanent employee, the foreign worker from GPGC might take time to replace even though they are working in daily basis. Employee absenteeism without notice is a major potential problem that company need to concern. Besides that, conflict between employees may arise in company. If the conflict and complaint cannot solve by supervisor, it will make trouble to the business operation. However, it is also difficulty in hired an experience supervisorto manage the foreign worker due to the communication constraint. 9.4 Financial Risk To launch a new product to market, we need to invest huge amount of capital in dealing with suppliers, hire employees, marketing, purchasing and so on. We need to have sufficient capital in the begging of our day-to-day business operation. However, the unpredictable economic downturn might affect our company financial planning. During inflation and economic downturn, customer purchasing power is reducing. In that moment, they are likely to save money rather than spending. In fact the demand for product may drop critically during this period of time. This scenario may lead our company generate low profit or even worse, facing losses. 9.5 Intellectual Property Infringement Counterfeit products Counterfeit products are likely to have a fake company logo and brands to attract customers. When our product has been launched in market, our product design or features can be copied or imitate by our competitor. It is result in intellectual property infringement like patent infringement or trademark infringement occurs when someone uses our intellectual property without our permission. Counterfeit product tends to decrease our product uniqueness and affect our company reputation for being low quality. 9.6 Other Risks as Appropriate Fire safety in the workplace Many unexpected circumstances may happen in the workplace which might cause fires or explosions. Situation that may cause in fire such as electricity short circuit, electrical equipment, wood, paper, plastic, lighting and accidents which can cost our company to have a huge lost. Burglary and Theft Running a business is risk as you cannot predict what will happen and you cannot entirely control people behavior. For example, crime such as burglary and theft can be committed by either internal staff or external people. Even if happened internally also hardly to be traced. 9.7 Contingency Plan 9.7.1 Management Risk In order to solve the problem of inexperience, our management needs to boost our skills base. We are encouraging our team management to attend management training courses, seminar, risk management courses, negotiation training courses and leadership program to upgrade our management ability. Those training courses are designed to improve our leadership and management skills including time management, conflict management, developing mindset, problem solving, presentation strategies, communication and strategic planning. Thus, all those skills and courses are needed in develop our ability to meet our business objectives. Besides that, we have to make sure that our management operates without conflict and more fairness. Management should follow company rules, policies and standard operating procedures as guidance. So that everything operates under a clear and orderly condition. 9.7.2 Marketing Risk We can increase our brand recognition by conducting marketing analysis. The market analysis present useful information about the industry and market which our business wants to enter. We can get the useful information including our customer purchasing trends, spending power and competitor information. Based on the analysis, we can reduce business failure as we able to understand about our customers’ needs and select appropriate market entry strategies to penetrate into the target market. The most importantis narrow down our target market into a manageable size. Next, we are trying to target specific people with advertisement and promotion in generating brand awareness to our product. For example, there are many new social websites and they will offer a free service, and online adverting available. In this way, we can directly reach our potential customer by advertising, giving discount, voucher and coupon through print media, newspaper and trade show. When our product is appear more and more times to the potential customer, it will increase our product brand recognition and profits. 9.7.3 Operating risks Employee training and development program will be providing every three month. Employee will attend the program selectively to improve their ability and performance. Besides, hire an experience supervisor will help in control our staff effectively as they know how to build relationship and dealing with employee’s complaint. They are representing company in management of employee concern, problem and complaints. To meet employee needs, management and supervisor shall constantly meet with worker to show their concern. We will increase permanent employee salaries 10% for 1st year and 20% for 2nd year accordingly to enhance their motivation and loyalty. Other additional incentive such as health insurance, vacations and OT claim will given to appreciate their effort. 9.7.4 Financial risk To reduce financial risk, our company accounting and finance department are also playing important role. They are responsible for the day to day accounting transaction of the business. Furthermore, they have to calculate all the employees’ salaries, company earning, cash payment, income tax and so on. They are helping our company in checking and monitor company expenses is exceed the budget so that it is always have sufficient cash flow in daily operation. Therefore, an excellent accounting and finance department is needed to provide information to assist our management in making accurate budget planning. 9.7.5 Intellectual property protection Our company will register for the trademark and patent to protect our product imitate by other people. Register for trademark and patent prevent other designing or merchandising similar product under a clearly different mark. Hence, we can protect our company reputation and profitability. If any intellectual property infringement detected we can take legal action to court against the party. It is the ownership right that we can use to protect our product from imitate. 9.7.6 Other contingency plan We need to prevent our company from fire and keep people safe. Fire detection and warning systems will be install in our factory area especially assembly line to alert people when there’s fire. Once the alarms active from smoke and heat it is alert that somewhere is on fire. Next, firefighting equipment must be installed, tested and train our staff to use them so that they know how to use them in critical moment. Fire drills training will be given at least one times per year to train them about the fire risk management. To minimize burglary and theft occur in company installing Closed-Circuit Television (CCTV) must be implementing.

Establish Clear Expectations and Consequences :: essays papers

Establish Clear Expectations and Consequences In order to ensure that classroom learning is conducive to both the physical and emotional growth of the student, rules that explain what behavior is expected need to be reviewed. Chen, Horsche, and Nelson (1999) believe that giving children choices will help them develop a sense of ownership in regard to the learning process. Let the students decide how they will follow the rules. By working together, everyone has an opportunity to contribute to the overall environment of their classroom. After rules and procedures are established, it is important that the teacher admires good performance and provides negative consequences for unacceptable behavior. According to Marzano and Marzano (2003), the use of both verbal and physical reactions will help teachers reinforce classroom procedures (p.8). Simple physical signs like a â€Å"thumbs up† or a verbal â€Å"good job† will show the students that good behavior is recognized. Also, a teacher must be consistent with punishments for those who disregard the rules. â€Å"How you handle a situation with any student will teach that student something – as well as everyone else in the room† (Solan, 2002). It is essential that the teacher communicates immediately with a misbehaving student. Using different methods, like simply moving closer to the one who is disruptive, could be a cue which may reduce the chance of interrupting the whole class (Petch-Hogan & Murdick, 1996). A warning can often be eno ugh to correct improper behavior, thereby avoiding the need to assert full punishment. Communication Must Remain Open The best way to ensure a good classroom environment is to make sure that communications remain open between school officials, teacher, and parents (Brophy, 1982). This creates a feeling of trust within the classroom. Without being able to communicate properly, learning can not take place. Students with dialects, different languages, and backgrounds will make up many classrooms. Woolfolk (2004) feels that â€Å"communication is at the heart of teaching and culture affects communication† (p.174). Adjusting to different languages and cultures is a difficult task. Therefore, it will take everyone’s help to create a safe environment in the classroom. Know and Respect Your Students The headlines in Educational Psychology sum up that a good teacher will know, respect, and teach her students (Woolfolk, 2004). Teachers should never discriminate and always respect each child as an individual (Eggen, Jacobsen, & Kauchak, 1993).