Wednesday, October 30, 2019

Anaylses of Ishıgura's The Remains of the Day through the issues Essay

Anaylses of IshÄ ±gura's The Remains of the Day through the issues of Stevens roles, persona,repression,deception and self deceit - Essay Example Firstly, the character of Mr. Stevens the Butler is depicted brilliantly in the novel by bringing out the subtleties and nuances of emotion and internal conflict. Mr. Stevens is quite reserved and introverted by natural disposition, whose manifestations take inhuman proportions when he adds qualities of orthodox professionalism to his work. Mr. Stevens’ work ethic is centered on a particular understanding of â€Å"dignity†, which requires him to focus exclusively on serving his master, in his case Lord Darlington and compels him to remain insulated from external circumstances of the lives of both. It is also made clear that Mr. Stevens is not unaware of the dangers of this pattern of behavior, as suggested by his sense of guilt. But it is not much later in the narrative, after the calamitous developments of the Second World War under the Nazi command that Mr. Stevens admits to his betrayal and guilt. The Butler’s code of conduct, which Mr. Stevens immaculately in culcates in him turns into an affliction, when he completely subordinates his personal feelings and aspects of his persona to the dictates of that code of conduct. In other words, his role as the Butler of the Darlington house blinds him from being critical of his employee and induces a sense of moral numbness, which is reflected in other aspects of his life, as discussed in the next paragraph. Mr. Stevens exhibits such extreme measures of restraint and reserve in his demeanor that it reflects in his speech as well. Not only does he ever indulge in small banter but his language and choice of words represent a Victorian sensibility and professionalism that borders on being mechanical and inhuman. Kazuo Ishiguro mildly suggests that such understanding of one’s professional role eliminates all qualities of humanness from the individual. Another feature of is personality is his tendency to hide unpleasant facts

Sunday, October 27, 2019

Operations Management for Competitive Advantage

Operations Management for Competitive Advantage Introduction : Operations Management is present in many occupations as well as those of manufacturing and service industries. I believe it to be present in daily duties of any person although they may never notice. With this in mind I see operations management as a skill anyone has with an aim of achieving an outcome of something they are working towards in a logical process with thought of awareness of a system structure. Operations management has been around for some time yet it was Christopher Polhelm (Sweden) first recognised a skill and recorded that Nothing increases demand so much as low prices. Therefore there is a great need of machines and appliances which will diminish the amount or intensity of heavy work (Extract from text book Operations Management supplied by DMU for open learning please see bibliography) this was around 1700. There are cases in many history books and stories passed down that operations management was present before this yet not identified as operations management. From 1700 business development has grew significantly and seems to have been a notable point of operations management to present day. Operation management is depending upon five performance objectives i.e.ÂÂ  Quality, Flexibility, Cost, Speed and dependability. Quality: Quality means doing things right. An operation needs to be spotless and in order, have appropriate and attractive furnishings and make sure that the staffs are friendly and helpful. Quality reduces costs and increases dependability. Flexibility: The Flexibility facilitate to any changes. Different products and services need to be available, for example the opening times need to be varied as the main customers (students) have varying timetables. ÂÂ   Cost: The membership prices need to be a suitable price to facilitate students and people with different financial situations. The cost of hiring employment needs to be considered as well as the cost of the equipment. The lower the cost of producing their services, the lower the cost to the customer will be. This is a very attractive attribute, especially to students. Speed: The speed of the internal processes can reduce inventories and reduce risks. Dependability: The staffs want to be able to do things in time for the customers to receive their services. Being reliable causes the customers to become more loyal over time. Dependability can save time, save money and give support throughout the operation, internally and externally. In this assignment I try to focus on above all objectives and how manufacturing process is going? How much time taking each Department for their work? Why occur delay for delivery to Customer? Whats role of Human Resources in maintain Quality, Cost and Time? Why storage is create scarcity of space? Why quality is going down? Product value and Customer satisfaction Etc. Operation management find out best solution before arise problem. Operation Management is helpful for Decision making, Developing a process strategy, managing effective project, process analysing, Demand Forecasting, managing Quality, planning Capacity, managing Inventories etc. In this assignment I researched on Rama Newsprint Papers Ltd, India, which is largest private paper Production Company. It is running by more than 2000 workforce. This is manufacturing Cream Wove, Super printing, base paper for coating, map litho; SS map litho, Copier paper and newsprint etc. It has $ 50 million equity or spread over in 400 ac res land. RNPL has also own 23 mw Power plants. This company is huge in paper industry sector and I am sure it will be increase my knowledge in Operation management and its systems. Manufacturing Process of Newsprint Paper : The paper industry is basically based on wood and wood based pulp. But Rama Newsprint is produce paper by Recycling process. This plan is zero wastage process plans. Wastepaper is a key input in the production of newsprint, packaging paper and paperboards. Production of specialty paper involves the use of different varieties of pulp, which lend special quality to the paper. Here below illustrate whole manufacturing process of paper. R D and QC Department : This department play important role in manufacturing process. R D department is continuously taking sample from Raw material, Deinking and Paper machine for checking quality of ongoing process and find out anything wrong in the process. As per operation management quality is very important issue and this is handled by R D and QC department. Raw materials Department : Paper manufacturing is start from Raw materials department. This department is using Virgin Pulp, Local/Imported old newspaper (ONP), News Pams, Mixed office waste, Old Telephone Directory, Old magazine grade (OMG) for raw materials. But these all materials are available in wastage paper. This department is sorting fibre, plastic, iron, dust etc from west paper. Sorting is important part of process. If sorting is not good, quality of paper will be bad. This is very sensitive department and root of the process. This department retain maximum labour for sorting work. After sorting process this wastage paper send to Deinking department and complete their work. ( Ref C : http://www.madehow.com/images/hpm_0000_0006_0_img0128.jpg ) Deinking Department : After completion of Raw materials sorting process, Deinking department is ready to start next process. In this department waste papers have been mixes with water and wash by Chemical. This departments core work is removing Ink from paper and converts in to Pulp by mixing Sodium hydroxide and sodium sulphide. The chips close into pulp in the resolution. Next the pulp is sent through filters.ÂÂ  BleachÂÂ  may be added at this stage, or colourings. The pulp is sent to the paper plant. Thats for this department called De-Inking. In this stage also mix some chemical for create brightness in paper and which is providing by CAPP department. This completed Pulp has been send to paper Machine Department and finished their work. Paper Machine Department : The pulp is next put through a beating and squeezing course called, properly enough, pasting. Inside a large container, the pulp is subjected to the produce of machine beaters. At this point, various packing materials can be supplementary such as chalks, clays, or chemicals such as titanium oxide. These additives will control the dullness and other qualities of the final product. Sizings are also added at this point. Sizing affects the way the paper will react with various inks. ( Ref C : http://www.madehow.com/images/hpm_0000_0006_0_img0128.jpg ) In instruct to ultimately revolve the pulp into paper, the pulp is fed or pumped into colossal, automated machines. One ordinary category is called the Fourdrinier instrument. Pulp is fed into the Fourdrinier machine on a touching belt of bright mesh selection. The pulp is squeezed through a series of rollers, while suction strategy under the belt drains rotten water. If the paper is to obtain a water-mark, a device called a dandy moves across the sheet of pulp and presses a design into it. The paper then moves on top of the press part of the machine, where it is pushed between rollers of wool felt. The paper then passes over a series of steam-heated cylinders to eradicate the left over water. A large machine may have from 45 to 65 aeration cylinders. Finishing House Department: Finally, the dried paper is injuring onto large reels, where it will be additional processed depending on its last use. Paper is round and packed in further by passing through metal rollers called calendars. A particular finish, whether supple and waterless or solid and glossy, can be imparted by the calendars. The paper may be further ended by passing through a container of sizing material. It may also obtain a covering, which is either brushed on or rolled on. Covering ads chemicals or pigments to the papers outside, supplementing the sizing and fillers from previous in the course. Fine clay is often used as a covering. The paper may after that be supercalendered, that is, run from first to last extremely silky calendar rollers, for a closing time. Then the paper is cut to the wanted size. Product Wear House Department : This is the final stage of Paper process. This stage PWH department is packing cutter paper and send to storage or customer. This department is storage paper size wise on different place. Whenever requirement arise easy to find out and send to customer. Product life cycle of RNPL : When offering papers product to customer is that they have a variety. They have an enormous number of a ways of expenses their money and spaces to spend it. Therefore, Rama newsprint papers places considerable emphasises on developing a new paper product which customers want. Market research establishes exactly what this is. However customers requirements change overtime. What is fashionable and eye-catching today may be excess tomorrow. Marketing constantly monitors customers first choice. In order to assemble these changes, RNPL has tried to launch new product with change in old product. The type of selling undertaken and the amount invested will be dissimilar, depending on the phase a product has reached. For example, the begin on of a new product will classically involve television and other advertising support. At several time a company will have a variety of assets, a share portfolio integrated shares in a range of different companies of product each in a diverse phase of life cycle. Some of RNPLs option is going constant at the growth stage. Paper is a daily use product but not much profit making industry. In Indian market more than 800 paper industries are running in paper sector. So competition is on high level and also tough. Thats reason is for paper industries are not reach to maturity level of product life cycle. Process Flow Chart : A process chart is a set method of documenting all the activities performed by a person or group at a workplace, with a customer, or working with certain materials. It analyzes a process using a table, and provides information about each step in the process. It is used to drill down to the job level for an individual person, a team or a focused nested process. In this process five categories. Process flow chart with easy to identify gap between two process and this is giving idea to management for generating idea for resolve it. On below chart easy to identify marketing department send order to PWH department on right time. But lack of efficiency of PWH department, they are not putting in to process and make a delay. Also PWH department is looking storage department. But there negligence on work create scare of place. Here paper machine department have good efficiency in spite of they cannot work due to scarcity of space. So whole operations in PWH department is making delay in process. Quality Circle : Quality is important part in Paper Industry. If industry ignore to this concept, They will be loose their customer and lose their image in market. Rama Newsprint papers Ltd is also believe in this concept and Quality circle implemented in organisation. RNPL established department wise Quality circle committee and they meet to one time in a week. They discussed regarding problem, production, cost reduction idea, new technology, participative management, Decision making on new things etc.. They are tried to solve problem at department level. If its not possible than bring it to management level and search solution. Quality circle is good concept in management theory and RNPL completely follow to this and short out problem on root level and avoid delay. This is also responsible for cost saving and quality improvement. Porters Value Chain Michael Porter (1985) the strategic inventor of the Porter Value Chain constructed a chain effect understanding that every business should implement for logical understanding and awareness of its inputs and outputs as a business. He separated the business functions into primary and secondary methods, primary being dedicated to the product or service and secondary being supportive methods to aid the primary. Porters (Michael Porter 1985) Value Chain (VC). From the model suggests, that no issue how many operational units that are concerned in the course of generating customer value; these primary actions can be conceptualised into five common stages. The five primary stages are inbound logistics, operations, outbound logistics, marketing and sales, and service. These primary stages are supported by the firms infrastructure, human resource management, technology development, and purchasing and procurement. The stages within the VC should not be seen in segregation but looked at in a wider context and include the connections between stages not just within the processes. The relationship between sales, operations and procurement for instance can determine how much stock is to be carried and therefore reflected in cost of inventory held. ( Ref Book Operation Management Processes and Supply Chain Lee, Larry Manoj ) Value activities are divided in to two types, Primary activities and support activities. Primary activities involved in the physical creation of the product, sales and transportation to the buyers as well as after sells services. Primary activity alienated into five categories. Support activities are support to primary activities and each other given that purchased inputs, technology, human resources and various firm-wide functions. Primary Activities : The primary activities of the organisation are group in to five main areas: Inbound logistics : RNPL concerned with receiving, storming and distributing the inputs to the products. In this included raw materials, handling, stock control, transportation etc.. Operation : the transformation of these various inputs into the final paper or newsprint : machine, packaging, testing etc. Outbound logistics : The collection, storage and distribution of the product to customers. In RNPL involves Product were house activities, material handling, transportation etc. In this part most important to bring services to customer on fixed location. Marketing sales : in this part RNPL create their own image in paper industry by advertising, highest production per day and strong administration department. Also loosening with customer and take a feed back of customer. Services : all the activities depend upon services after sells. After sells services consist of installation, start up of product, replacement, warranties etc. RNPL also provide quality assurance guarantees to customer. Support Activities : The support activities divided in to four areas. Procurement: all primary activity have been refers to the process of acquiring the various resource. This is the main part of the organisation. Human Resource management: RNPL is very poor about human resources and this is the main root of problem. Here value chain is play important role to emphasise more training development, motivation like monitoring non monitoring ways to workforce, recruiting skilled manpower. Technology development : Technology is directly related with product, process or resources. if employees do not understand how to operate equipment, its create big problem for firm. In RNPL most of the workforce recruit experienced with higher pay scale. This is increase production cost to firm. If they create their own workforce by providing T D to old staff is better than higher new staff. Infrastructure : RNPL plan lay out and infrastructure is good but some place require some change. Infrastructure is also consisting of the structure and routines of the organisation that sustain RNPL culture. This all activities are implement perfectly by RNPL is must be require for in competitive terms, value is the amount that buyer are willing to pay for what a firms provided them with product perceived value. Value chain model is very helpful to RNPL for win to paper market and therefore they have to implement and follow above all activities. So value chain is guide to industry how to win market and create own image in market. For RNPL has a value chain is key success. Recommendation : As student I cannot give the exact idea about reading just few papers for the company which is running successfully since 1991. Company has history of19 years they have created their name and fame through their working pattern and workforce who works for them. I am little bit small to evaluated and give the recommendation to the companys board of directors they are the genius in their planning and implementation of their Operation Management systems. 1 ) Most of the companies are manufacturing product depend upon order or make to stock. RNPL is also following these methods. But RNPL not use perfect performance metrics in process and these are the main reason for delay in manufacturing product. As a student I would like to suggest to RNPL, if they will follow some below formula for manufacturing process. Defiantly they will almost achieve their target. Operation time = Setup time Run time Throughput time = Average time for a unit to move through the system Speed = Throughput time Value-added time Cycle Time Example Suppose RNPL had to produce 10 paper roll in 50 hours to meet the demand requirements of a product. There are 3000 minutes (60 minutes/hour x 50 hours) in 50 hours. So the average time between completions would have to be: Cycle time = 3,000/10 roll = 300 minutes. Process Throughput Time Reduction All of this work done after RNPL should apply bellow main three concept for process. A ) It must be execute activities in corresponding. B ) Change the series of activities. C ) Reduce interruptions 2 ) Human Resource Management : Humans are core part of process and they have been a particular platform in Organization. Human is sensitive part of operation management. If employees are not satisfied, organization will loose target. Employees play important role in quality management and have a power to make decision that will improve quality and customer services. Strategic goals for quality and customer satisfaction require teamwork and group participation. RNPL is face lack of satisfaction in their employees and that for so many causes are responsible. I would like to suggest some ideas for implementing in company for success in paper sector. Employees are not satisfied with management systems. Management follows autocratic and close leadership and this is demotivate to employees. If RNPL will understand employees requirement and change the management styles towards employees, definitely company will get incredible growth. Change the management style from Autocratic to Liberal, means employees have been invite for decision making, Quality circle, participation in management, giving more responsibility etc.. These all are motivate to employees for achieving goal. RNPL should more focus on Technical commercial training to employees. Trained workforce is more productive as well qualitative and also Time saver. RNPL should be implement below T D activities through minimise cost, time and maintain quality. Create Apprentice force in the Organisation. Apprentice is productive, cheaper and easy to available. Provide more paper machine operation training to employees and these are useful for minimise cost and increase qualitative production. Job specification has been implementing in Organisation. Employees have been mastery in work through it. These is key of maintain quality, cost and time. Job rotation is also important part of operation. It should be implementing in RNPL. Also provide commercial training like time keeping, communication, leadership, cost reduction etc. 3 ) Raw materials department has been also needed some change for Time saving and Quality maintaining. In sorting work per bunch require maximum 20 to 30 minutes. But lack of inspection on labour makes delay in this process. Also sorting work is not going accurate. This is creating adverse impact on Paper quality and deinking departments system. So as per my suggestion management have to take strict step against labour. 4 ). Product wear house department is end of the manufacturing process part. This department is looking storage, separation and selling work. RNPL has lots of space for storage. In spite of arise scarcity of space due to lack of skilled staff. They have no any proper storage system which is helpful for identify thickness wise paper. So they have to implement storage system like inventory management system. 5 ) Central Engineering stores is located so far away from main core department in plan. Maximum time wasted in collection for equipment from store to concern department. If central department located near to core department, definitely maximum time will be saved by RNPL. Conclusion : I conclude that although most businesses look different in their operation most of them actually are similar because all businesses need a foundation to start off with and when they build from their foundations this is where differences occur because of their overall business plan in the 5 key business function. They are Operations Management, Human Resource Management, Marketing, Accounting Finance and Information Management in which they operate from. They start to defer within the sectors they build their business on as every business has a different way of getting their products and services forward depending on the market they explore in which they try to dominate through success to keep the business alive. They key difference is how they outsource their organisational role and activities all depend on how the business is adapted to operate to meet the demand of the businesss activities. This is vital for the business to fulfil their organisational needs so the operation of the business is flawless and it will maximise their organisational productivity and stability. History of RNPL : ( Appendix 1 ) Rama Newsprint and Papers Ltd is largest private sector in Printing Writing paper manufacturing company at a single spot in India. It has 22 percent capacity of production in Indian newsprint sector, based on Virgin Pulp as well as Recycled fibre, to manufacture either 1,44,000 tonnes per annum of Newsprint or 1,80,000 tonnes per annum of Printing Writing paper or a mix of both. The paper mill was established in 1996. Its is set up with an equity of Rs. 233 crores ( US $ 50 million ) and spread over 450 acres of land in village Barbodhan, Gujarat, India, the company is managed by professional Board of Directors having enormous practice in related fields. The company is able to produce Newsprint and Writing paper from Virgin pulp as well as Non-conventional raw materials. The company has also demonstrated deep commitment to the cause of preserving the environment, by setting up a state of the artÂÂ  facility for manufacture of Environ friendly Chlorine free paper. The Company has its own Power plant and water works, means uninterrupted power and water supply leading to non-stop production. A causative feature is the internal engineering workshop for defensive maintenance and looking after leading to permanent invention of process, quality and productivity. Technical partnership with world best in the newsprint industry and aided by a highly qualified and committed workforce of about 500 personnel has now seen us expand into synergetic industries as well as set up an sell overseas existence in Asia and Africa. Water : RNPL has sufficient water bring for its plants and for general human use from Narmada Water Resources Department, Government of Gujarat. RNPL has also occupied a range of initiatives for water upkeep such as Rain water harvesting, recycling re-use of water in the process of manufacturing. Power : RNPL has 23 MW confined power plant installed at site, which ensures supply of quality power for permanent operation of the plant without any break due to power cuts. RNPL has also reserve unit of 17 MW installed at site. Majority of RNPLs power demand is met through confined plant. However It has power authorize boundary of 8500 KVA for paper mill and 550 KVA for raw water supply intake pump house from Gujarat Electricity Board in case of any possibility or surplus demand. Mission : To establish ourselves as leaders in the paper industry in terms of efficiency, productivity, profitability and above all, customer service..

Friday, October 25, 2019

Religious Fanaticism Essay -- essays research papers

In Moliere’s comedy Tartuffe, The play centers on the family of Orgon, a wealthy and impressionable man, his central target of ridicule is Orgon. Orgon is Moliere’s character of how man can be so blind in his devotion to a belief that he cannot make a good judgement as to the sincerity of others who would use that belief to deceive him. This play fits into the concept of comedy because all of the elements of comedy are present. It happens that the title character is the villain rather than the hero and some of the elements have been tampered with. In Tartuffe, we have the classic comic scenario of two lovers, Valere and Marianne, trying to get together but being thwarted. However, instead of the villain, Tartuffe is not the one who is antagonizing them, it is Orgon who gets in the way. Orgon tries to flatter Tartuffe by offering Marianne to be his wife. Before it is all over, Orgon ends up giving the deed to all his land to the deceitful Tartuffe. The other comic elements such as the unmasking of the villain and the happy ending are also present in Tartuffe. It is in the duality of Orgon, who is a believing and devoted subject, and Tartuffe, the manipulating hypocrite. Moliere takes his shot at the extremes of enthusiastic belief. Tartuffe plays the role of a man whose greedy actions are cloaked by a mask of overwhelming piety, modesty and religious passion. Orgon is the head of a household who has taken Tartuffe in, and given him shelter and food. Everyone in the family, ex...

Thursday, October 24, 2019

Summary of Reconfigurable Antennas for Wireless and Space Applications

Satellite and Mobile Communication Course Course Number: 361-2-5931 Lecturer: Professor Arnon Shlomi Article Summary Assignment â€Å"Reconfigurable Antennas for Wireless and Space Applications† By Christos G. Christodoulou, Fellow IEEE, Youssef Tawk, Steven A. Lane, and Scott R. Erwin, Senior Member IEEE Proceedings of the IEEE 100, no. 7 (2012): 2250-2261 Assignment by: 1. Introduction A reconfigurable antenna (RCA) is an antenna that is able to be formed, or bent. From this definition one can deduce the significance of such antenna to wireless communication. RCA will allow adaptation, additional functionality and more versatility.Therefore, RCAs, with the ability to radiate more than one pattern at different frequencies and polarizations, are necessary in modern telecommunication systems. The article discusses the different reconfigurable components that can be used in an antenna to modify its structure and function. These reconfiguration techniques are either based on the integration of radio-frequency micro-electromechanical systems (RF-MEMS), PIN diodes, varactors, photoconductive elements, or on the physical alteration of the antenna radiating structure, or on the use of smart materials such as ferrites and liquid crystals.All of the above techniques redistribute the antenna currents and thus alter the electromagnetic fields of the antenna’s effective aperture. Therefore, enabling the antenna to enhance its bandwidth, change it operating frequency, polarization, and radiation pattern. 2. Reconfiguring Techniques Six major types of reconfiguration techniques are used to implement reconfigurable antennas, as indicated in Fig. 1. Here I shell focus on two, electrical and optical RCAs. RCAs can be classified into four different categories. a) frequency RCA; (b) radiation pattern RCA, for this category, the antenna radiation pattern changes in terms of shape, direction, or gain; (c) polarization RCA; and (d) combination of the previous categorie s. There are several advantages in using reconfigurable antennas. (a) Ability to support more than one wireless standard. Hence, it minimizes cost and volume requirements, simplifies integration and offers good isolation between different wireless standards; (b) lower front-end processing.Therefore, there is no need for front-end filtering and there is a good out-of-band rejection; (c) best candidate for software-defined radio. Thus, has the capability to adapt and learn and can be automated via a microcontroller or a field programmable gate array (FPGA); and (d) multifunctional capabilities. Consequently, can change functionality as the mission changes, can act as a single element or as an array and can provide narrow- or wide-band operation. However, there are disadvantages for adding tunability to the antenna behavior. a) the design of the biasing network for activation/deactivation of the switching elements which add complexity to the antenna structure; (b) increase in the requi red power consumption due to the incorporation of active components which augments the system cost; (c) generation of harmonics and inter modulation products; and (d) need for fast tuning in the antenna radiation characteristics to assure a correct functioning of the system. Figure 1: Techniques to achieve RCAs 2. 1.Electrically RCAs The ease of integration of such switching elements into the antenna structure has attracted antenna researchers to this type of RCAs despite the numerous issues surrounding such reconfiguration techniques. These issues include the nonlinearity effects of switches, and the interference, losses, and negative effect of the biasing lines used to control the state of the switching components on the antenna radiation pattern. RF-MEMS: The antenna shown in Fig. 2 is a reconfigurable rectangular spiral antenna with a set of RF-MEMs switches, which are monolithically integrated and packaged onto the same substrate.The antenna is printed on a PCB substrate and fe d through a coaxial cable at its center point. The structure consists of five sections that are connected with four RF-MEMS switches. The spiral arm is increased by discrete steps as integer multiplications of the length of the first segment of the rectangular spiral. It is increased following the right-hand direction to provide right-hand circular polarization for the radiated field. The location of switches is determined such that the axial ratio and gain of the antenna are optimum at the frequency of interest.Based on the status of the integrated RF-MEMS, the antenna can change its radiation beam direction [2]. Figure 2: (Left) a radiation pattern RCA. (Right) fabricated prototype with the biasing line 2. 2. Optically RCAs An optical switch is formed when laser light is incident on a semiconductor material. This results in exciting electrons from the valence to the conduction band and thus creating a conductive connection. The linear behavior of optical switches, in addition to t he absence of biasing lines, compensates for their lossy aspect and the need for laser light to activate them.Integrated Laser Diode: Optically RCAs can be implemented by integrating laser diodes directly into the antenna substrate. A copper piece is attached to the back of the antenna ground, as shown in Fig. 3. This piece has a minimal effect on the antenna radiation pattern since it has a small depth and a smaller width and height as the antenna ground plane. The laser diodes are activated via a current driver to generate the required output optical power. An example of this type of reconfigurable antenna is shown in Fig. 3a. The antenna top layer is the radiating patch while the bottom layer represents the antenna ground plane.Two silicon switches (S1 and S2) are included to allow the antenna to tune its resonant frequency. To activate the silicon switches, laser diodes are integrated within the antenna substrate by attaching a small copper piece to the ground of the antenna, as shown in Fig. 3b. Two holes are drilled throughout the substrate in order to allow the light from the laser diode to be delivered to the silicon switches. These copper pieces are also used as a heat sink for the laser diodes [3]. Figure 3: (a) optically RCA. (b) Laser diode integration with copper fixture, back layer. (c) Prototype, to layer . 3. Smart Materials RCAs Antennas are also made reconfigurable through a change in the substrate characteristics by using materials such as liquid crystals or ferrites. The change in the material is achieved by a change in the relative electric permittivity or magnetic permeability. In fact, a liquid crystal is a nonlinear material whose dielectric constant can be changed under different voltage levels, by altering the orientation of the liquid crystal molecules. As for a ferrite material, a static applied electric/magnetic field can change the relative material permittivity/permeability. . Satellite Applications The need for dynamic space app lications has led to the realization of RCAs for satellite communication. In such systems, it is necessary to reconfigure the antenna radiation pattern to serve a new coverage zone, limit fading in rainy areas, and maintain high data rate at all possible frequency bands of operation. E. g. an antenna structure for satellite applications generates an elliptical beam ranging from 10. 95 to 14. 5 GHz using an 85-cm aperture. Using a rotational and zooming mechanism, the antenna can tune its radiated beam from a â€Å"small ellipse† of 2. 3 °X3.  ° to a â€Å"large ellipse† of 6 °X9 ° [4]. Reconfiguration in space has also been achieved through the use of deployable antennas. These antennas change their shape from compact, small structures to large blooming antennas in space. The objectives are to realize high gain and high directivity, which are primarily determined by the size of an antenna aperture. The antenna itself can be reconfigurable to cover several frequ ency bands as the mission of the satellite changes. 4. Summary Reconfigurable antennas were divided into electrically, optically, physically, and smart-material-based tunable structures.Christodoulou et-al expect future smart reconfigurable antennas to be completely multifunctional and software controlled with machine learning capabilities that can detect changes in their RF environment and react accordingly. Moreover, the merging of deployable and reconfigurable antennas will open new frontiers in the design of antennas for space communications. 5. References 1. Christodoulou, Christos G. , Youssef Tawk, Steven A. Lane, and Scott R. Erwin. â€Å"Reconfigurable Antennas for Wireless and Space Applications. † Proceedings of the IEEE 100, no. 7 (2012): 2250-2261. 2. won Jung, Chang, Ming-jer Lee, G. P.Li, and Franco De Flaviis. â€Å"Reconfigurable scan-beam single-arm spiral antenna integrated with RF-MEMS switches. † Antennas and Propagation, IEEE Transactions on 54, n o. 2 (2006): 455-463. 3. Tawk, Y. , J. Costantine, S. E. Barbin, and C. G. Christodoulou. â€Å"Integrating laser diodes in a reconfigurable antenna system. † In Microwave & Optoelectronics Conference (IMOC), 2011 SBMO/IEEE MTT-S International, pp. 794-796. IEEE, 2011. 4. Roederer, Antoine G. â€Å"Antennas for Space: Some Recent European Developments and Trends. † In Applied Electromagnetics and Communications, 2005. ICECom 2005. 18th International Conference on, pp. 1-8. IEEE, 2005.

Wednesday, October 23, 2019

Police Patrol Essay

Section 1 – Introduction Indeed, the safety and prosperity of local communities is dependent upon, in large part, a prevention of criminal activity.   It is in safe communities that businesses grow and prosper, people bring their families to live, and others like to visit.   With this in mind, the classic way to ensure that communities are free of crime is through the use of police patrol.   It is the police presence that has typically kept crime in check (Sklansky).   However, the financial cost of police patrol often makes such protection quite difficult to put into action.   In this research, the cost of police patrol will be examined through the discussion of the following article: Farrell, Graham, Erin Lane, Ken Clark, and Andromachi Tseloni. â€Å"What Does the World Spend on Policing? [*].† International Journal of Comparative Sociology (2001): 59. Conversely, alternative methods of crime prevention, aside from the use of the conventional police patrol will be examined through the discussion of this article: Rubin, Herbert J. â€Å"Economic Partnering with the Poor: Why Local Governments Should Work with Community-Based Development Organizations to Promote Economic Development.† International Journal of Public Administration 23.9 (2000): 1679. Additional sources will be cited where necessary to ultimately make the point that while police patrol is important, it is costly, and there are other methods/resources that can be tapped into to complement the effectiveness of police patrols without exceeding budgets or overextending the ability of small police forces to accomplish what they need to accomplish. Section 2 — The Main Points of the Two Articles Farrell, Graham, Erin Lane, Ken Clark, and Andromachi Tseloni. â€Å"What Does the World Spend on Policing? [*].† International Journal of Comparative Sociology (2001): 59. The main point of this article are that internationally, in small and large nations alike, the total amount of money spent on policing and crime prevention totals in the hundreds of billions of dollars, and with that, the question of whether or not that money is well spent.   Additionally, the article discusses the role of civilians in the process of preventing crime, which reduces the burden on the conventional police patrol. Rubin, Herbert J. â€Å"Economic Partnering with the Poor: Why Local Governments Should Work with Community-Based Development Organizations to Promote Economic Development.† International Journal of Public Administration 23.9 (2000): 1679. In close relation to the first article, this article makes the point that among other governmental organizations, local police agencies should work with community-based, civilian organizations to achieve the goal of fighting crime, which is one of the main reasons for the existence of police patrols themselves. Section 3 – Comparison and Contrast of the Two Articles The two articles chosen for this research do in fact possess similarities and differences which, ironically, all contribute to making the point that police patrols are effective and necessary, but would not be effective, and indeed cannot be effective, if they are overburdened by too much work for too few officers, or if the police organizations are unduly restrained by a lack of economic resources. First, the Farrell article weighs the cost of police patrol against the results that are obtained for the money that is spent.   Far from saying that police patrols are ineffective, the article says that overburdened police patrols are ineffective, and therefore, in lieu of money that does not exist, police patrols should be aided by community/civilian resources whenever possible. Following on the heels of the first article, the Rubin article makes the very important point that local police agencies, if faced with a lack of funds, should work more closely with community organizations in order to achieve effective crime prevention and apprehension of criminal offenders after the fact. In a roundabout way, both articles do in fact make the same point; if police patrols are to be effective in the future as they have been in the past, they will need some help.   The answer is not to overextend patrols or to cut them due to underfunding, but rather to collaborate more closely with the community for the mutual benefit of both.   The modern police force faces challenges that those of the past did not; increasing need for diversity in police forces, additional personnel because of the increases in crime, and population increases make the scope of the traditional police patrol much more complicated and expensive than ever before (Sklansky).   Also significant is the huge cost of the processing of criminal cases in courts of law due to the increasing complexity of criminal law (Frodsham) Section 4 – Conclusion Based on the analysis of these articles and accompanying additional resources, the conclusion has been reached that police patrols are very effective, if and only if they are either properly funded or if they are assisted by civilians and community organizations in the absence of adequate funding.   Therefore, in conclusion, police patrols should be continued, and should be supported by communities if they are to continue to properly function.