A.C. Devices Essay Example for Free

A.C. Devices Essay INTRODUCTION Although in our daily life we use A.C. current devices. But rectifier is a ‘Electronic device which converts A.C. power into D.C. power’. The study of the junction diode characteristics reveals that the junction diode offers a low resistance path, when forward biased, and a high resistance path, when reverse biased. This feature of the junction diode enables it to be used as a rectifier. The alternating signals provides opposite kind of biased voltage at the junction after each half-cycle. If the junction is forward biased in the first half-cycle, its gets reverse biased in the second half. It results in the flow of forward current in one direction only and thus the signal gets rectified. In other words, we can say, when an alternating e.m.f. signal is applied across a junction diode, it will conduct only during those alternate half cycles, which biased it in forward direction. TYPE OF RECTIFIER Mainly we have two types of rectifier : 1. Half wave rectifier. 2. Full wave rectifier. JUNCTION DIODE AS HALF WAVE RECTIFIER When a single diode is used as a rectifier, the rectification of only one-half of the A.C. wave form takes place. Such a rectification is called half-wave rectification. The circuit diagram for a half-wave rectifier is shown in Fig. Principle : It is based upon the principle that junction diode offers low resistance path when forward biased, and high resistance when reverse biased. Arrangement :- The A.C. supply is applied across the primary coil(P) of a step down transformer. The secondary coil(S) of the transformer is connected to the junction diode and a load resistance RL. The out put D.C. voltage is obtained across the load resistance(RL) Theory : Suppose that during the first half of the input cycle, the junction diode gets forward biased the conventional current will flow in the direction of the arrow-heads. The upper end of RL will be at positive potential w.r.t. the lower end. During the negative half cycle of the input a.c. voltage, the diode is reverse biased. No current flows in the circuit, and therefore, no voltage is developed across (RL). Since only the positive half cycle of the input appears across the load, the a.c. input is converted into pulsating direct current (d.c.). Disadvantage of Half-Wave-Rectifier : 1. Half wave rectification involves a lot of wastage of energy and hence it is not preferred. 2. A small current flows during reverse bias due to minority charge carriers. As the output across (RL) is negligible. 3. The resulting d.c. voltage is not steady enough for some purpose. The following device is used when a very steady d.c. voltage is required. JUNCTION DIODE AS A FULL WAVE RECTIFIER â€Å"A rectifier which rectifies both waves of the a.c. input is called a full wave rectifier†. Principle :- It is based upon the principle that a junction diode offers low resistance during forward biased and high resistance, when reverse biased. Difference from half-wave-rectifier :- The main difference is that in full wave rectifier we use two diodes. For this when we apply a.c. current to the rectifier then the first half wave get forward biased due to first diode. And when the second half wave comes. Then at that time the second diode comes in action and gets forward biased. Thus output obtained during both the half cycles of the a.c. input Arrangement :- The a.c. supply is applied across the primary coil(P) of a step down transformer. The two diodes of the secondary coil(S) of the transformer are connected to the P-sections of the junction diodes (D1) and (D2). A load resistance (RL) is connected across the n-sections of the two diodes and at centre of the secondary coil. The d.c. output will be obtained across the load resistance (RL). Theory :- Suppose that during first half of the input cycle, upper end of (S) coil is at positive potential. And lower end is at negative potential. The junction diode (D1) gets forward biased, while the diode. (D2) get reverse biased. When the second half of the input cycle comes, the situation will be exactly reverse. Now the junction diode (D2) will conduct. Since the current during both the half cycles flows from right to left through the load resistance (RL) the output during both the half cycles will be of same nature. Thus, in a full wave rectifier, the output is continuous but pulsating in nature. However it can be made smooth by using a filter circuit. REVERSE BIASING ON A JUNCTION DIODE A P-n junction is said to be reverse biased if the positive terminal of the external battery B is connected to n-side and the negative terminal to p-side of the p-n junction. In reverse biasing, the reverse bias voltage supports the potential barrier VB. (Now the majority carriers are pulled away from the junction and the depletion region become thick. There is no conduction across the junction due to majority carriers. However, a few minority carriers (holes in n-section and electrons in p-section) of p-n Junction diode cross the junction after being accelerated by high reverse bias voltage. Since the large increase in reverse voltage shows small increase in reverse current, hence, the resistance of p-n junction is high to the flow of current when reverse biased. MATERIAL REQUIRED 1. Transformer : It is device which is used to increase or decrease the alternating current and alternating voltage. For the rectifier, it may be step down or step up. 2. Junction Diode : It is made up of p-type and n-type semiconductor which conducts when the p terminal of diode to connect to positive terminal of battery and n region is connected to negative terminal of battery i.e. during forward biased and does not conduct during reverse biased.

Environmental Problems In The Superstructure Construction Construction Essay

Environmental Problems In The Superstructure Construction Construction Essay To identify the environmental problems in the superstructure construction, we need to recognize the environmental aspect of this site. So that identifies the environmental impact or problems. According to the ISO 14001:2004 Environmental Management system, it lists out several environmental aspects a) emissions to air, b) releases to water, c) releases to land, d) use of raw materials and natural resources, e) use of energy, f) energy emitted, e.g. heat, radiation, vibration, g) waste and by-products, and h) physical attributes, e.g. size, shape, colour, appearance. Environmental aspect and impact Emissions to air During construction, all the material e.g. ready mixed concrete truck will deliver to the site by trucks or other vehicles, any transportation method to the site will require fuel to run. Thus they will release some pollutant to the air like CO, CO2, NO, NO2à ¢Ã¢â€š ¬Ã‚ ¦ Impact Global warming will become more obviously. Although CO2 can maintain the temperature in the earth, excessive CO2 emission will cause green house effect. If the temperature continuous rise, it will become a big disaster for example the mean sea level will increase and the land will drown due to the ice in polar is melted. On the other hand, some of the pollutant will affect the health of human for example NO2 can irritate the lungs and lower resistance to respiratory infection such as influenza. Releases to water Due to the statutory requirement in Hong Kong, the exit of the site must install a wheel washing system to avoid any dust or pollutants bring to outside environment by vehicles. This kind of system will consume so much water and the water will be soil water. Any discharging of waste water will cause pollution. Impact If the waste water is directly discharged to the soil without any treatment, the toxic chemical inside the water will affect the existing plants or tree. The soil will store the toxic contaminant even passing many years. Also, the waste water will create a bad smell to environment. They may not damage the human health, but the bad smell will affect the working condition for worker. Releases to land The site area will divide to several parts for storage area. However this kind of material may be highly corrosion to the existing land for example cement is acidic and the soil is alkali. When cement is leakage to the soil, the soil original property will change and harmful the existing tree and plants. Impact The soil contamination will happen; the soil will become harmful to the existing tree and plant. This effect will not disappear in a short time; it is a long term effect. Use of raw materials and natural resources Timber is one kind of natural resources. It made by tree e.g. hard wood, soft wood. In building construction, timber is playing a very important role of construction material. The most commonly type is timber formwork. Before discharging the fresh concrete, timber formwork will form the fresh concrete to required shape. However the timber formwork cannot use many times because the fresh concrete will corrode the timber formwork. Impact The tree needs to take long time to grow, so timber will not provide without limit. In addition, there are many other products made by timber like furniture, paperà ¢Ã¢â€š ¬Ã‚ ¦ If the timber is over used and the timber becomes less production, it will very inconvenient for human life. Moreover the tree have a function to absorb the CO2, so when more and more tree disappear, the situation of global warning will get worse. Also the root of the tree can hold tightly to the soil, when the tree is cut, more chance to happen landslide in sloping area. Use of energy and f) energy emitted All the equipments will require electricity to operate in the site for example some hand tools use by worker, lighting system, passenger hoist and material hoist. On the other hand the machine will consume fuel to operate during excavation or transportation. During piling work on the site, the piling process will create big noise and vibration to the environment. Nevertheless, other construction process will also generate big impaction to environment. Impact Since the electricity is come from the fossil fuel by generator, the fossil fuel will create lot of containments like CO2 when burn them. As the above mention, CO2 will lead to green house effect and global warming will appear. Huge vibration will easily get settlement in adjacent buildings. Also the noise will annoy people and become noise pollution. Waste and by-products and h) physical attributes, They are almost same as the above mention. Reference Safety plan What is a safety plan? Safety plan is a document to direct the safety activity for a project. The main idea of the safety plan is to minimize the accident which causes worker injury and any hazard of their health. It will include the following things 1.Safety Policy, 2.Safety Organization, 3.Safety Training, 4.In-house Safety rules regulations, 5.Safety Committee, 6.Programme for inspection of hazardous conditions, 7.Job hazard analyze, 8.Person Protection Programme (PPP), 9.Accident/incident investigation, 10.Emergency preparedness, 11.Safety Promotion, 12.Health Assurance Programme, 13.Evaluation selection and control of subcontractor, 14.Process control programme Safety Policy We need to follow the statutory requirements Factory Industrial Undertakings Ordinance and Regulations Dangerous Goods Ordinance and Regulations Electricity Ordinance Fire Services Ordinance Builders Lifts and Tower Working Platforms (Safety) Ordinance Any related ordinances and regulations Safety Organization The following safety responsibilities should be clearly assigned: Monitoring the implementation and compliance of the Site Safety Plan Arrangement for regular reporting and communication Preparation of method statement, hazard identification survey, risk assessment and establishment of risk control system and monitoring its effectiveness and progress Training and promotion communicating with the enforcement agencies and outside advisory sources Reactive action to staff suggestion Subcontractors First-aid officer, competent persons and examiners 3. Safety Training To ensure the worker can use the machine properly to speed up the construction sequence and avoid the accident happening. The project should provide the following training like: Aerial Lift Operator Training Crane Operator Training Defensive Driver Training Powered Industrial Truck Operator Training Before the work start, it should have a site orientation or induction of training. The orientations provide a forum for the owner/managing contractor to convey its commitment to provide a safe working environment for all individuals on the job site. There also is an opportunity to remind everyone of their responsibility to give due consideration to safety while planning and conducting their work. This is the time to reinforce their responsibility not to expose others on the job site to risks or hazards. 4. In-house Safety rules regulations The entire worker in the site must wear the safety helmet and when the worker needs to wear the safety rope before they require working in height. The worker should wear the air-purifying respirators like mask to avoid any harmful contaminants inhale to worker body. Before the worker start to work, they must have suitable certificate with the corresponded safety training course. So the worker can prove they have required ability to work. Confined Space Certified Worker Safety Training Course Forklift Truck Operator License Examination Course Safety Training Course for Electric Arc Welding Manual Lifting and Handling Competent Person Safety Training Course Electrician License A Trade Test Preparation Course Electrician License B Trade Test Preparation Course Safety Committee Establish regularly coordinating meeting and site safety committee arrangement. Programme for inspection of hazardous conditions Regular inspection on the site the time interval is based on the past performance and hazard profile. Establish the inspection profile like compliance and safety walk and responsible personnel (including site senior management, safety officers and safety supervisors) Using the checklist to ensure they are fulfilled the standard. Job hazard analyze There are many hazards on the site like: Fall from height Falling objects Stepping on or striking against object Hazards associated with operation of machinery, transport and earth moving equipment such as concrete mixing plants, trucks, bulldozers, excavators etc. Hazards associated with lifting of materials, both mechanical and manual. Electrical hazards Fire hazards Chemical hazards Collapse of earth during excavation, slope cutting After we identify the corresponding the risk of the hazard, we can arrange the suitable solution to minimize the accident. Person Protection Programme (PPP) We must ensure that the use of personal protective equipment (PPE) is the last resort after exhausting the hazard control. The PPE includes Safety helmet, safety footwear, UV protection (e.g. long sleeve shirts, wide brim hats, 15+ sunscreen) and eye, hearing and respiratory protection The selection and procurement must choose appropriate PPE with the qualification. We should provide suitable training to the worker to show how to use, storage and maintenance of the PPE. For example, we need to provide the safety helmets cabinet to store them. Accident/incident investigation Establish a system of notification, recording and reporting. We should provide some systematic arrangement for investigation and implementation of remedial measures to curb further recurrence. Structured approach for compiling and analyzing accident Statistics. Arrangement for studying the trends of accidents and formulate strategies for enhancement of performance. Emergency preparedness For small fire accident, it should provide the suitable fire-extinguisher e.g. water CO2, foamà ¢Ã¢â€š ¬Ã‚ ¦ to stamp out the fire. For large fire accident, all the construction work must stop and follow the emergency routes to escape. Also, alarm system should be provided to remind worker to escape. For heavy typhoon like signal 8 and the red and black signal of the rainstorm, all the construction work must stop. We should provide the emergency manual on the site which contains: An emergency plan Floor plans and layout showing emergency exits, firefighting equipment Diagrams and layout of dangerous goods stores Telephone numbers of key company personnel, the police, etc. A list of outside bodies qualified to assist with special problem Safety Promotion We should have regularly meeting to the worker on site to promote the safety construction. Also we can establish the award and penalty system e.g. pay safety. If they can fulfill the safety requirement, they can get extra money. Otherwise, it will be reverse. Using the posters, magazines, newsletters, accident statistics displays video to increase the safety awareness of the worker. Health Assurance Programme We should provide some system such as pre-employment and medical examination programme for monitoring the exposure of labour. Noise control and provide suitable ear protector to the worker if they need to work in high noise area. Provide enough toilet facilities, hand washing, drinking water, resting and eating place and facilities for storage of personal protective equipment. Evaluation selection and control of subcontractor Means of communication and coordination with subcontractors and their employees and appropriate sub-contractor control. We must provide properly test system to check that all tools, materials and substances used by the subcontractors comply with statutory requirements. Establish some systems for reviewing subcontractors performance. For example if the sub-contractor cannot fulfill the standard, they will be exchanged. Process control programme Arrangement and procedures for ensuring that safety rules, and working sequence have been established and implemented for all safety and health aspects, and in particular a safe system of work, safe working method statement and permit-to-work system for highly risky operations, including but not limited to the following: Management of the Place of Work Fire Arrangements including precautions and firefighting equipment Work in confined spaces Working at height House keeping Protection against falling objects Management of Tasks and Operations Excavations Lifting operations Mechanical materials handling Temporary works Management of Equipment, Plant, Materials and Services Compressed air tools Electricity supply system Electrical works Portable tools Two main hurdles for the implementation of safety plan I think the money and labour safety awareness are two main hurdles. Since the money is the main domino of the whole project. Provide the safety training to the worker will spend extra time in the whole construction project. Some clients will argue that why dont we spend the time to work to speed up the whole project. Also, we need to use some human resource to supervise the construction process. Since the main purpose of the construction company is making profits. Even the project manager knows that the higher quality and standard of the personal protective equipment will be more safety. However, it will pay more money and increase the total construction cost. From the above reason, the project manager will do the minimize things of the statutory requirement; they will not do the best about the safety, so that they can have maximum return in the construction project. The other hurdle for the implementation of safety is the safety awareness of the worker. The labour will think that the personal protective equipment is very inconvenient for work. For example, they think that wear safety rope work in height will disturb their working. It is because the safety rope will limit the working area. And if they only work for few minutes at height, they will not wear them due to require extra work. Also, the worker cannot correctly use the PPE, so they cannot function properly. http://www.ab.ust.hk/hseo/esst/Const-notes2001.PDF http://www.polb.com/civica/filebank/blobdload.asp?BlobID=2527 http://www.safetypartnering.com/smd/pdf/pfss.pdf http://www.qbuild.qld.gov.au/00_downloads/whs_construc-safe-plan_all.pdf Quality plan The main elements of the quality are the following things: Management responsibility We need to define different quality duty of different position of Executive Committee, Project Manager, Construction Quality Assurance Manager, Design Quality Assurance Manager, Sampling and Testing Personnel, Staff Inspectors, Testing Technician, Geotechnical Engineer Pile Driving Analyst, QA Surveyor and Construction Manager. For example the duty of the Project Manager is responsible for organization and maintenance of a document control system for all quality data, coordinate quality check point in quality control programme reviews, and ensure reviews coordinated with outside entities. Objective of the quality plan Consistency meets the standard and requirement of the client To deliver the project on time with agree quality and prize To maintain and continually improve the quality of management systems To maintain and continually improve the quality of whole project Establish the quality policy To achieve the highest standard and quality of the project, it should be provided highly professional construction team. Establish the long term relationship between supplier and sub-contractor Follow the standard of ISO9001_2008. The construction work must under the supervision and inspection by authorize people. Provide training to the worker who is the first time come on the site. When any problems arise, the solving method should not be downgraded the target quality. Communicate the expectations of this Policy to all employees and stakeholders. Fulfill the client requirement Treating all our employees with respect, equality and fairness Resource management For human resource, we need to provide training to teach them how to properly use the equipments. Also demonstrate the require standard for them to reach the require quality. For material purchase and selection, we need to choose a properly material with suitable budget. Since the prize will directly affect the quality, so the budget arrangement is very important. Well-known and reputation supplier company should be selected to ensure the material quality. Inspection testing and quality audit We should establish the acceptable standard to the worker like accepted level of defection. After the standard is published, we need to provide suitable testing to ensure that they can reach the require standard. Then, it will be recorded for future improvement. An internal quality audit system will introduce in this project and it will be implemented during each phase of the project. Document control Establish the recording system and process to control Project Documents at each Project Phase. Ensure that the latest information is provided to the all staff and workers, so they shall use the update information to process the construction work. Two main hurdles for the implementation of quality plan http://www.wsdot.wa.gov/NR/rdonlyres/27A54B86-9825-4E81-9DEE-138823B4ED86/56842/QMPOutline050409.pdf http://www.suzlon.com/pdf/SEA_Quality_Policy.pdf The Purpose of a Project Quality Plan https://stdmail.cityu.edu.hk/attach/BSI%20BS%20EN%20ISO9001_2008.pdf Task 2 Social obligations and professional responsibilities of legal and ethical issues According to the Hong Kong Institute of Construction Management, the project manager shall: in fulfilling their professional responsibilities and the duties which they undertake, have full regard to the public interest. demonstrate a level of competence consistent with their professional. ensure, when undertaking any other construction related activity, that all such work is in accordance with good practice and current standards and complies with all statutory and contractual requirements; at no time improperly offer or accept gifts or favors which would be affect the client to obtain preferential treatment; keep them informed of current thinking and developments appropriate to the type and level of their responsibility. They should be able to provide evidence that they have undertaken sufficient study and personal development to fulfill their professional obligations in accordance with the current guidelines not offer or provide whether to a prospective Client or a third party any gift or favor whether in money or otherwise designed to secure instructions for work not undertake work for which they knowingly lack sufficient professional or technical competence, or the adequate resources to meet their obligation Social obligations and professional responsibilities of client protection The project manager shall: not divulge to any person, firm or company any information of a confidential nature relating to the business activities or processes of their Employer or Client acquired during the course of their work; not, without the permission of their Employer or Client, render any services, with or without remuneration, which conflicts with the interests of their Employer or Client; ensure, when providing an advisory service, that the advice given is fair and unbiased; if undertaking any other construction related activity be required to maintain insurances and indemnify their Client against the risks for which insurance is commonly effected arising out of the works in respect of workmen, third parties and adjoining properties; when acting for a Client or when in contemplation of acting for a prospective Client whose interests conflict or may conflict with his own, or those of any of his associates to disclose the relevant facts forthwith to the Client or prospective Client and to the associate and where such disclosure is oral to confirm the same in writing at the earliest opportunity and inform the Client that he shall be unable to act or continue to act unless the Client requests him to do so; keep in one or more bank accounts separate from his own, his firms or his companys bank account (as the case may be) any Clients money held by or entrusted to him, his firm or his company in any capacity other than that of beneficial owner; account at the due time for all moneys held, paid or received on behalf of or from any person (whether a Client or not) entitled to such account and whether or not after the taking of such account any payment is due to such person.

Technology has bad effects on environment

Technology has bad effects on environment Industrialization coupled with technological advancement has continued to affect the environment in a negative way. Industrial benefits resulting from technological adaptation in major activities has indirectly contributed towards higher living standards though bad part on technology manifest more. This is evidenced by increasing international discussions and consultations through conferences and meetings. A major theme in such meetings is on environmental violations resulting from technology. Complaints and issues associated with effects of technology are arising globally (Ausubel Sladovich,1999). Environmental degradation is a growing concern as continued industrialization is being witnessed mostly in developed countries. There are three major negative impacts of technology on environment discussed in this essay. First, environmental pollution resulting from waste output is a resultant factor of technology. Contribution to global warming is the second effect of the growing technology. Lastly, depletion of natural resources and ecological imbalances experienced today result from technology. To start, environmental pollution occurs as a result of technology mismanagement and lack of control measures. Technological improvement in recent years has seen production of more machines, weapons and automobiles. Increased consumption of improved facilities triggers demand which in turn influences supply of required quality of products that are major effectors of industrialization using improved technology. Importance of technology in such cases is attributed to satisfaction of human wants. Though adverse pollution of environment due to increased production in the manufacturing and processing industries, weapons testing and high usage of automobiles such as cars. Air pollution, water and noise pollution are the key components of an environment that has been continually polluted as a result of technology. Emission of large quantity of gases such as CO2 in the air by large industries causes air pollution which in turn has degraded environment immensely. Again, disposal of waste into the rivers and water systems by industries and other institutions is an environmental hazard through water pollution. Similarly, a lot of noise pollution from weapons testing and usage, industries in their routine production processes and automobiles is causative of environmental dilapidation (Ausubel Sladovich, 1999). Furthermore, technology contributes towards depletion of resources. Development and usage of technology is contributing to increase industrial activity that requires raw material from natural resources such as coal, timber and wild animals. As well, extensive agricultural activities as experienced in Bangladesh is beneficial in terms of productivity but depletion of natural resources such as forest cover, water and soil fertility and its organisms composition is a likely event. Farming activities such as burning of bushes, deforestation and usage of chemicals to enhance soil fertility is an environmental exploitive. As well extensive mining of gold, diamond and other minerals is an activity that is contributing towards depletion of resources at an alarming rate. Overexploitation of fossil fuel and other resources ceases to be beneficial and becomes an environmental threat. In addition, ecological systems imbalances and disruptions result from technological advancements in the modern world. Collapse of ecological life and extinction of organisms from their natural habitats is a direct probable result of technology. Wildlife extinction from their natural habitat to create more space for farming activities and home for increasing population is an evidence of how technology causes ecological imbalances. Availability of improved technology causes people to device convenient ways of satisfying their basic needs and increased productivity requirement. Human embark of activities such as deforestation, extensive farming activities, environmental pollution which lead to changes in the natural lifecycles that maintain ecosystem. Though ecosystems can rebound from these negative effects, continued of environmental degradation through destructive human activities affected by technology will eventually lead to collapse. Lastly, current issues on global warming are negative effects of technology and environmental factors. Unchecked technology advancement and utilization specifically in areas causing air and water pollution leads to atmospheric gases imbalances (Ausubel Sladovich, 1999). Emission of harmful gases such as CO2 in large amounts forms greenhouse effects that are the major components of global warming. Green house gases result from activities such poor farming methods, transport systems, manufacturing processes and renewable power generation activities especially using coal. Fossil fuel extraction through burning and clearing of farming lands through burning concentrates harmful gases hence affecting climate. In conclusion, higher percentage of environmental problems is a direct result of technology mismanagement by innovators and users. A small portion of environmental issues relate to economic, social and natural changes resulting from human activities. Environmental pollution, ecological systems disturbances, depletion of natural resources and climatic changes resulting from global warming are technological influenced. Technology is significant in development and increased productivity to satisfy human need, but uncontrolled technology impacts environment negatively. References Ausubel, J. Sladovich, A. (1999).Technological advancement. Washington D.C, US: National Academic publishers.

Two Women in Proverbs 9 Essay -- Religion Bible Proverbs 9 women Essay

Two Women in Proverbs 9 Proverbs has always been one of the most renowned and loved books of the Bible. According to the prologue, it was written â€Å"to teach shrewdness to the simple, knowledge and prudence to the young† (1.4), and to â€Å"let the wise also hear and gain in learning, and the discerning acquire skill† (1.5). It is primarily addressed to young men, as the author makes frequent references to â€Å"my son† throughout. The purpose of this book was to help prepare young men for leadership and life. A proverb, which serves the purpose of drawing a comparison between two forms of behavior to teach moral wisdom, explicitly fulfills its role in particularly chapter 9 of Proverbs. In light of this father-to-son instruction, the author uses the personification of two different types of women in order to illustrate the two corresponding paths of life: wisdom and folly. Although there are many striking similarities of both women in Proverbs 9, the subtle differences between the two didactically imparts life lessons to young men. The speaker begins the passage of Proverbs 9, by informing that the first similarity that Lady Wisdom and Lady Folly share is the possession of a house. The only apparent difference is that Lady Wisdom has built her own house: â€Å"Wisdom has built her house; she has hewn her seven pillars† (9.1). Lady Wisdom has not simply constructed her home, but it is given that her house is a large one, representing wealth. There is no reference to Lady Folly building her house—she sluggishly just â€Å"sits at the door of her house† (9.14). Metaphorically, the speaker of this passage is advising the young men to be hard-working, signifying the importance of diligence, which is a constant underlying thre... ...m will lead to life. The speaker is saying that it is well worth it to embark on the path of wisdom and to persevere through it for there is an unseen reward awaiting them. Lady Wisdom and Lady Folly are not mentioned in Proverbs 9 to be merely two contrasting women that the young men should be aware of when they look for a wife. Representing the two ways of life, Lady Wisdom and Lady Folly are used to bring awareness to the young men about the subtle differences between the respective routes of life. It is emphasized that every decision counts and that just one decision can mean the difference between life and death. Because the teacher knows that the young men are the ones who will ultimately make crucial decisions of their own, he uses this particular juxtaposition of Lady Wisdom and Lady Folly to prepare them for what challenges lie ahead for them.

A Cure for Cancer Essay -- Biology Apoptosis

For years people have been looking for a cure for the devastating disease of cancer. Cancer is the third highest killer in the US with over 2,500,000 victims per year. Oncologists and scientists around the country are researching all forms of cancer in an effort to understand, treat, and ultimately defeat this disease. Already there have been numerous advances in the field, such as chemotherapy and gene therapy. One advance has been the use of a cell process known as apoptosis. By harnessing this normal cell process, scientists hope to have found an effective way to combat cancer. Cancer is a disease that affects human somatic cells. It causes the cells to divide uncontrollably and form masses known as tumors. There are two different types of cancer tumors. Some tumors are benign and other tumors are malignant. Benign tumors look similar to the tissues that they came from and develop slowly. The tumor remains in the same area that the tumor originated in. Malignant tumors are formed from cells that do not resemble the tissue that they came from. They vary in shape and size. This enables pieces of the tumor to break off and spread to other places in the body. Over the past few decades cancer has become a very prominent disease. There are many different types of cancer and many different causes for the the disease. Most cancers are because of a genetic mutation. The most common type occur when a cell is dividing. Proto-oncogenes, which are alleles in a normal cells, mutate to form oncogenes. These oncogenes cause cancer because they do not allow the cells to sel f destruct or become epistatic. There have been several research projects which have been testing epistatis. Transfecting DNA To perform the experiments for this re... ...wth of both normal and malignant cells. The limited research that has been performed using these cells has yielded contradictory results: some results say that the alpha5beta1 integrins destroy cancer cells, other results have shown that cell division and other necessary cell functions have been encouraged by the integrin. But the research has predominantly shown that the results of the expression of alpha5beta1 integrins yield beneficial results in terms of cancer tumor reduction. More research needs to be done, but the knowledge obtained from this experiment that alpha5beta1 integrin prevents premature cell death is an excellent step forward in the fight against cancer. There are untold possibilities of the medical applications of not only alpha5beta1 integrins, but all of the many integrins and cell adhesion molecules that play important roles in cell function.

Home Depot’s Bumpy Road to Equality Essay

Internet/Case Study Assignment: 1. If Home Depot was correct in that it was not discriminating, but simply filling positions consistent with those who applied for them (and very few women were applying for customer service positions), given your reading of this chapter, was the firm guilty of discrimination? If so, under what theory? Yes, Home Depot was accountable of discrimination towards women due to their standards of hiring by reinforcing gender stereotyping; causing them to be guilty of disparate treatment. The disparate treatment in this case was due to women being treated differently in comparison to their male co-workers in regards to promotions, pay, and hiring. Female applicants who felt discriminated were mainly those who applied for jobs within Home Depots West Coast Division. They felt they were being overlooked during hiring and bypassed in connection with promotions, salary, and job assignments opportunities within the workplace. Home Depot, however, felt they did nothing wrong and stated the unfairness of what they were being accused of was due to most female job applicants having experience as cashiers, so they were placed in similar positions, such as, cashier positions, clerical duties, customer service, and so forth. In addition, their explanation for the high turnaround in percentage of male employees within the home repair, plumbing, carpentry departments, etc†¦ were due to male applicants expressing interest in those type of skilled employment. 2. How does this case illustrate the application of new technology to solving issues that have never been tied to technology? Can you think of other ways technology might be used to address diversity/EEO/affirmative action issues? Home Depot was able to tie technology by solving issues by introducing a Job Preference Program, which provides in-store computer kiosks that allow employees to check job opportunities within their workplace and the skill requirements for each position. This system helps employees upgrade their skills. In addition, Home Depot offers a web-based learning program which allows employees to increase their product knowledge and eligibility for new  positions. The Job Preference Program has helped the company eliminate discrimination and other barriers within the recruitment process. Since its roll-out in 1999, the program has reduced employee turnover and in a single year, female and minorities have attained management positions increased by 28 to 30 percent from earlier periods. This system has also shown to be a huge success among managers as they feel they are now able to prescreen adequately qualified applicants. Technology can also be used to address diversity/EEO/affirmative action issues by having a systematic process in place which can help with gathering, analyzing and documenting information about particular jobs, and personnel information including but not limiting to disciplinary actions as well as promotional considerations. For example, a systematic analysis can specify each workers job description entailing their salary base range, this way employees don’t feel underpaid but satisfactorily compensated amongst their peers performing their same duties. By having such technology in place a company can avoid fines, penalties and costly litigation of unhappy employees feeling discriminated and pursing legal actions. In addition, technology can address some diversity by providing employees with online trainings which will enable them to apply to new positions within the workplace and track their preparation and job skills; causing maximum strategic development. Furthermore, with the ease of technology, employers can have the capacity to monitor working conditions to ensure each job is being performed successfully and satisfactory. Technology can also help with affirmative action’s, by doing so, companies can develop tutorial guides which can help employees with a variety solutions to problems within their working environment. Tutorial guides can help improve workforce diversity, by assisting and addressing how one can handle issues among the workplace, for example, directing employees how to affectively respond to relationships between coworkers of other ethnicity, race, religion, etc.., and how to cope with personality conflicts; among others criteria’s within the workforce. Technology can also help with developing a systemic job analysis tool which can be resourceful to help with useful information for HRM practices. A systemic job analysis will provide useful plans for coordination, for example, determining job qualifications for recruitment purposes, developing training programs, developing performance appraisals rating forms, determining pay rate  factors, and performance standards for productivity improvement to name a few. All in all, technology can only get better with time by utilizing these tools within the workforce by complying with compliances and avoid lawsuits and penalties in the future.

Criticism of V for Vendetta

Criticism on V for Vendetta â€Å"Remember, remember, the Fifth of November, the Gunpowder Treason and Plot. I know of no reason why the Gunpowder Treason should ever be forgot† is the sentence that begins the film. â€Å"V for Vendetta† is a story of vengeance against the government in England. V is a man that was being held in a concentration camp and suffers from the experimentation by the hands of the scientists’ government. Then, he destroys and escapes from the facility and slowly hunts down his tormentors and gathers the citizens of England to form revolutionaries towards the totalitarian government (Armstrong, 2006).After that, he turns out to be a terrorist that wear dark clothes and a Guy Fawkes mask that murder and explode buildings with his tricks in order to achieve his goals. Then, he saves a girl, Evey, which is being abuse by the government’s rape-hungry secret police known as â€Å"Fingermen†. He made Evey to be his supporter and pr oceed his strategy on governmental destruction well by awaken and empower the people of England to form a revolution. He convinces the people by saying, â€Å"If you want to see who is responsible, look no further than a mirror,† he tells the country’s citizens. I understand, you were afraid,† he says by way of forgiving them. It’s the people who put Britain’s corrupt, hate-driven government in power, and it’s the people who must stop it. â€Å"People should not be afraid of their governments,† pronounces V, â€Å"governments should be afraid of their people† (Tyler, 2012). In fact, there are ideas in this film which relates to the mass society theory in terms of society and politics. For instances, V’s belief stated that, â€Å"People should not be afraid of their governments.Governments should be afraid of their people†. Hence, this film can be strongly influence the society to use the idea of forming a revolutio n to against the monarchs of their particular country. Consequently, the film director, James McTeigue, noted that, â€Å"We felt the [graphic] novel was very prescient to how the political climate is at the moment. It really showed what can happen when society is ruled by  government, rather than the government being run as a voice of the people† (Ott, 2010).Besides that, another idea that is being point out from this film â€Å"Politicians lie to hide the truth, artists tell lies to reveal it† (Tyler, 2012). From that sentence, it is assuming that politicians tend to cover up their wrongdoings by many lies meanwhile artists uses lies to reveal the truth in something. Thus, this may create a perception from all the audiences who have watched this film that politicians are not very trustable and deceitful. According to Ott (2010), he conducted a study on the role of political affect in cinema by analyzing â€Å"V for Vendetta†.He argued that, â€Å"Vendetta h as an array of visceral resonances, pulsations, intensities, and sensations to invites viewers to reject a politics of apathy in favor of a politics of democratic struggle†. Furthermore, he also mentioned that in this film it has a relationship with politics and mass. In political rhetoric, the film would urged audiences not to keep silent as their rights and liberties were being restrict and also empowered them to speak out against their government. In conclusion, â€Å"V for Vendetta† film is one of the true examples on how the society will be influence by the idea of the film is illustrating.By relating this film with the mass society theory, it has the significant connection between political and society. References Armstrong, A. (2006, March 17). V's Vendetta Can't Ground Freedom. Retrieved June 14, 2012, from Colorado Freedom Report: http://www. freecolorado. com/2006/03/vendetta. html Ott, B. L. (2010). The Visceral Politics of V for Vendetta: On Political Affect in Cinema. Critical Studies in Media Communication , 39-54. Tyler, J. (2012). V for Vendetta. Retrieved June 14, 2012, from CinemaBlend. com: http://www. cinemablend. com/reviews/V-for-Vendetta-1472. html