Wednesday, August 26, 2020
Educators assume a focal job in the instruction of understudies. For advancement of learning educators need to show an awareness of other's expectations and must be in control of characteristics of initiative that are fundamental for inspiration of understudies. It falls upon the educators to make a cordial situation in the organization liberated from intimidation. They should educate through collaboration, assistance, love and caring disposition and not by practicing authority, control and giving disciplines. They should attempt to raise the confidence of understudies. Great educators make trust, certainty, intrigue, excitement and trust and not dread, dissatisfaction and frustration. They be thoughtful and pardoning as opposed to being vindictive. Educators must support and engage inquiries just as pose inquiries to invigorate minds and advance formal and casual conversations for improving basic reasoning and accomplishment of inside and out comprehension. They have to oftentimes assess studentÃ¢â¬â¢s execution both officially and casually and give them brief input as support, recognition, gratefulness and award for right execution and direction for amending botches both implied for development of their presentation and making of a craving for learning. They should instruct by communication with understudies as opposed to relying upon addresses alone. In this procedure they ought to distinguish the assortment of gifts that various understudies may have for various attractive capacities and should give them support for whatever potential they have. They ought to fortify imagination and innovation in understudies. Instructors ought to urge understudies to help, educate and test themselves and each other just as the more fragile and the lesser understudies. They ought to compose bunch learning ventures, challenges, rivalries, discusses, social exercises, amusement and field visits to make enthusiasm for learning. Instructors must stay modest and prepared to state Ã¢â¬Å"I donÃ¢â¬â¢t knowÃ¢â¬ and be set up to concede their missteps and take an exercise from them and from the slip-ups of others. They should not snicker, scorn, mortify, humiliate or affront any understudy over commission of missteps. Assuming instantly and amiably revised errors show paramount exercises for better execution. Aside from tolerating accuse they should make a propensity to state Ã¢â¬Å"weÃ¢â¬ and not Ã¢â¬Å"IÃ¢â¬ . They ought to be set up to talk less and listen more. They ought to be charitable enough to impart their credit to other people and own up to alone the fault for failings of understudies. They should impart to understudies before settling on all choices that influence understudies and should put forth an attempt to share their delights and distresses. Similarly educators should impart their inclinations to understudies that will advance fellowship. Educators ought to have a comical inclination and be fit for making humor. They should utilize various strategies to break tedium and fatigue I. e. by utilization of assortment of learning assets and showing strategies, important jokes, tests, addressing and including the preoccupied, making astonishments, puzzles and tension, alluding to pertinent occasions in everyday life and so on. They should instruct by model and go about as good examples as opposed to giving lessons. What they do has far more prominent capacity to instruct than what they state. They should have the option to do themselves what they anticipate from the understudies to do and be capable not to do what they anticipate from understudies to avoid. Indeed educators should place themselves in the shoes of understudies before requesting that they do or not to do anything. They should be delicate to the necessities and sentiments of understudies. They ought to communicate in the language of the understudies when required and ought to identify with their degree of mental and physical capacities. As per William GlasserÃ¢â¬â¢s Choice Theory, instructors must advance the essential needs of understudies to persuade them that they are the well wishers of understudies and consequently understudies will hear them out. These essential needs are the prerequisites of endurance, love and friendship, opportunity, relaxation, amusement and strengthening. This implies notwithstanding scholarly issues instructors must take distinct fascination and help understudies in their social and monetary issues and partake in their extracurricular exercises. Instructors should appoint increasingly more to understudies and forgo doing everything themselves. Along these lines, aside from engaging understudies, they additionally allow them to learn by doing. Rather than passing information to understudies they ought to be made to make information to give them a feeling of responsibility for they learn. Great instructors must determination debates through the strategy of compromise and put forth all the attempt to defuse strain and guarantee union and companionship among understudies. They should set a side time for tuning in to issues of understudies. They should respect their promises, be steady in their reactions, trustworthy and solid. They ought to be adaptable and not inflexible to meet the changing conditions and decent variety of circumstances. They ought to consistently be prepared for the sudden and must exercise most extreme persistence and resistance in managing understudies. Extraordinary educators never lose temper and forgo acting when disturbed. In troublesome circumstances they ought to joyfully get the contribution of partners, guardians and all the well-wishers of understudies. Instructors must treat all understudies equivalent, serve them magnanimously with commitment and anticipate no profits from understudies. Educators are viewed as profound dads and moms to understudies who are required to go about as aides and tutors. They should show graciousness, love, sympathy and regard to their understudies that will undoubtedly produce a comparable reaction. Instructors must partake in proceeding with training to refresh their own insight, aptitudes and perspectives, come arranged to classes and ought to endeavor to create learning assets for understudies. In conclusion they should guarantee their honesty, timeliness and physical and mental neatness no matter what. Instructors having these characteristics will be profoundly regarded and adored by the understudies and will make a perfect domain for learning in instructive foundations. The creating countries must be prepared to take care of such educators who will prep their youngsters into proficient, capable, gainful and edified characters of character.
Saturday, August 22, 2020
There are loads of zoos everywhere throughout the world. A zoo can be portrayed as the assortment of different creature species found in nature. Individuals can think about creatures by visiting zoos. Regardless of whether creatures ought to be kept in zoos or not,different individuals have various thoughts. A few people are agreeable to keeping creatures in zoos. However,others contend that keeping creatures in zoos overlooks basic entitlements. This paper will talk about the upsides and downsides of keeping creatures in zoos. The fundamental favorable position of keeping creatures in zoos is that they get spared from threats of predators. By keeping creatures in zoos guarantees their safety.At the equivalent time,animals would be avoided malady in the event that they were in zoos. Moreover,animals in zoos are given legitimate eating routine. In wilderness life,sometimes numerous creatures experience issues discovering nourishments. In zoos,zoo guardians gracefully creatures with fo od at a specific time. The creatures would have an expanded life expectancy on the grounds that there are no predators and they will never starve for food. In addition,there are many intriguing offices with regards to the zoo. Creatures can utilize them for the sake of entertainment. Furthermore,keeping creatures in zoos is helpful for diversion of human beings.Zoos give an approach to individuals to investigate creatures and perceive how they act. Individuals visit zoos for amusement as well as for instructive purposes. Numerous schools visit zoos to find out about imperiled species and the best approach to save them. However,there are likewise a few inconveniences of keeping creatures in the zoo. Firstly,it can't be denied that a few zoos abuse and disregard the basic entitlements. The laborers in certain zoos treat creatures in a savage way. Secondly,animals are kept in zoos for quite a while ,they may lose their sense capacity to get by in the characteristic environment.Animals are equivalent to individuals. It's not possible for anyone to experience the ill effects of denying of freedom. In conclusion,we reserve no privilege to keep creatures in zoos. In my opinion,it isn't right to keep creatures in zoos. We should regard basic entitlements. Creatures can get by in the common habitat without anyone else. On the off chance that people need to find out about animals,they can understand books and search data on the Internet or sit in front of the TV as opposed to visiting zoos. Keeping creatures in zoos isn't the best way to ration imperiled species. We people can do substantially more things to secure creatures.
Thursday, August 13, 2020
Guest Entry Engineers Without Borders Sorry I havent blogged in a while Ive been hosed with the deluge of tests, homework, and projects that inevitably follows CPW. To temporarily satiate your craving for reading about MIT while watching half of my face contemplatively sip coffee at you from my blog header, my tooling buddy Tiffany, a Course I junior with a terrifyingly robust sense of work ethic and a phenomenally operatic RB singing voice, has graciously offered to temper my usual Course VI nerditude by writing about her involvement in international development @ MIT. Enjoy! In the grind of the semester, its easy to forget that there exists an entire world outside of the college campus (hello Boston!). Yet, one of the most rewarding things about MIT is being able to apply the concepts you learn within the classroom to real-time projects that have a significant impact on communities around the world. This past year, I have been serving as project manager for the Engineers Without Borders-MIT Chapter. Engineers Without Borders is a non-profit organization that partners with communities in developing countries to improve their quality of life. One of our projects, for which I am team lead, is Showergy. Showergys premise is this: Imagine not being able to take a shower after a long days work. Now picture that every day. Hundreds of millions of people in the developing world lack access to water and facilities where they can cleanse themselves. Even where there is water, many, especially women, avoid going to communal showers in fear of attack or harassment going there and coming back. To help combat this fear, Showergy delivers all that is needed for the shower experience right to the users doorstep literally. Our cost-effective and easily installable shower system units will be implemented on almost every single plot as part of a franchise business model in conjunction with latrines. This design and model will ensure that community members do not have to walk more than a stones throw away. Our system also involves an innovative drainage and water reuse that prevents further contamination of critical water sources. By providing the means to basic hygiene, Showergy helps reduce the probability for disease and ensures a safe, reliable place for women, children, and senior citizens to wash themselves. Throughout the past few months, our team has designed a basic prototype of our individual shower system unit in MITs famous D-Lab. The âDâ in D-Lab stands for âDevelopment through Dialogue, Design, Disseminationâ; its goal is to assist students in improving the quality of life in low-income households through development of low-cost technologies. It is extremely common for students taking courses in D-Lab to travel over IAP or sometime during the year to implement the technologies that theyve developed. Anyways, you can actually step into the unit, look up at the showerhead, and take a shower! What does this mean for term life? Its actually a lot of fun. We get to spray each other with water while prototyping our pump mechanism. and be obnoxiously loud when using hammers. Currently, our project is entered into the IDEAS/Global Challenge competition, an annual contest sponsored by the Public Service Center that encourages students to develop or innovate a product â"it can be anything! that will assist developing communities in tackling some of the largest global problems, like disease, sanitation, and water shortage. The projects dont need to be fancy or complicated â" in fact, the best solutions to problems of these scale often are and need to be simple. There is an enormous variety of projects that are entered into the competition. The sheer amount of creativity and innovation going on here is through the roof! You can view all the teams here. Since the competition is ongoing, you can vote for five teams that you like the best if you register for an account (insert shameless plug for Showergy). To reiterate, there are incredible resources at MIT if you are interested in international development. Other resources include the Legatum Center for Development and Entrepeneurship, the Sloan Global Entrepreneurship Center, and the MIT International Development Initiative. If you are worried that your choice of major might affect how you can pursue international development, rest assured that no matter what you major in, you can probably apply it in a creative and significant way. Even as a junior, close to the end of my third year here, I am astounded by how easily ideas can happen here and actually become a reality, with some hard work, the right connection, and of course, a bit of luck. So now, I leave you with a question: What are the âbigâ problems that interest you and how do you envision tackling them? Several of my friends have gotten to travel to places like Nicaragua and Cambodia while involved with D-Lab projects. Sounds pretty fun! Feel free to email Tiffany at tifa(at)mit.edu or get in touch with her team if you have questions!
Tuesday, May 12, 2020
A genetically modified food is food that was made using organisms that were genetically modified as well. What the engineers do is take certain traits that they like from each crop and transfer them to another to get their desired food. There is a company called Arctic Apples which uses biotechnology to identify certain genes that, when mixed with polyphenolics, turns the apples brown. When they identify it, they remove the genes that cause it and the apples donÃ¢â¬â¢t go brown. This is one of many genetically modified foods available. Another usage is everything that we get from the mustard seed. From a simple mustard seed, we get many vegetables such as turnips, collard greens, broccoli, cauliflower and so much more. Genetically modified food can be very helpful in certain aspects, such as using a gene from the spinach plant to repel bugs to prevent crops from going bad instead of using dangerous pesticides. Another way that crops can be genetically modified is for crops be resis tant to freezing temperatures that can sometimes destroy crops and seeds. There are many reasons that we can benefit from genetically modified food. There are some downsides to genetically modified food however. Most of the crops that are modified are corn, soy and sugar beets. Most of the ingredients wind up in junk food and foods that arenÃ¢â¬â¢t very healthy for us. Because there is a high demand for those crops specifically, farmers plant more of these instead of rotating the types of crops that theyShow MoreRelatedBenefits Of Genetically Modified Foods1354 Words Ã |Ã 6 PagesGMOÃ¢â¬â¢s Genetically Modified Foods is a new contervserasonal topic on the health on agricultural of the world. It is heavily debated for the reason that it can be seen as a health risk or a major advancement in Agriculture. One on hand, it can be used to increase production, as well has have foods that could be altered to be pest-resistant and greater nutritional values (WHAT ARE THEY). While on the other hand, many consider Ã¢â¬ËSafety testing of whole foods is difficult. Generally assessment of Ã¢â¬Ësafety/toxicityÃ¢â¬â¢Read MoreBenefits Of Genetically Modified Foods905 Words Ã |Ã 4 Pagesthree decades since the discovery of genetically modified foods (foods formed by organisms that have gone through altering DNA using the procedures of genetic engineering.) In the year 1983, the original genetically modified herb was manufactured with antibiotic-resistant tobacco. A near decade after, the FDA (food and drug administration) had finally approved to put a genetically modified tom ato on the market. Countless organizations are proclaiming the benefits of GMOÃ¢â¬â¢s, whereas, other believe itÃ¢â¬â¢sRead MoreBenefits Of Genetically Modified Food1330 Words Ã |Ã 6 Pages Everyone has heard of genetically modified food. They have become so prominent in the United States and fill up a majority of our supermarkets. There has been controversy over the past few years on whether genetically modifying animals and crops is ethical and safe. But what a majority of Americans lack is knowledge of genetic engineering (GE). Many Americans hear the term genetically modified organism (GMO) and think it sounds scary or bad. They decide to be against the techniques of GE beforeRead MoreBenefits Of Genetically Modified Foods1647 Words Ã |Ã 7 Pages What foods are genetically modified? Well, most food that Ã¢â¬Å"contains sugar from sugar beets, soy, or corn,Ã¢â¬ is genetically modified (Mercola, 2015, p. 4). Most people consume genetically modified, or GM, foods e very day without even being aware. While some do avidly monitor their food consumption and avoid GM foods, others simply eat GM foods because, to them, GM foods seem safe to consume. In Ã¢â¬Å"Genetically Modified Foods Are Not Safe to Eat,Ã¢â¬ osteopath, Joseph Mercola, advocates his concerns of consumingRead MoreBenefits Of Genetically Modified Foods938 Words Ã |Ã 4 Pages Have you ever thought of what would happen to everyone on Earth if Genetically Modified Foods were allowed? According to the World Health Organization, Genetically Modified Foods or Genetically modified Organisms are organisms where the genetic material has been modified in a way that does not occur naturally by mating and/or natural recombination(World Health Organization). Genetically Modified Foods are foods that are altered to give more portions and cause people to earn more money. They alsoRead MoreBenefits Of Genetically Modified Food Essay1443 Words Ã |Ã 6 Pageseats only fresh, unprocessed foods that are marked as non-GMO or certified organic; chances are that one eats food that has been genetically modified. Up to eighty percent of food in stores in America are genetically modified. America pushes these foods and the biotech industry so intensely. But, are these foods truly safe? Many people donÃ¢â¬â¢t exactly know what a GMO is. A GMO is a genetically modified food. They are plants or seeds that have been changed genetically by scientist. Scientist do thisRead MoreBenefits Of Genetically Modified Foods998 Words Ã |Ã 4 Pagesengineering of foods, scientist, researchers, and farmers have changed the way food is grown. And this has started raising questions about the methods they use and their possible risks and side effects. To understand the risks and benefits of genetically modified foods you must first understand what they are. Genetically modified foods may also be referred to as GM foods, GMO, modified crops, GM organisms, or bio-tech foods. (Wohlers, Anton E, 2013, p73-84) You may see me referring to Genetically ModifiedRead MoreBenefits Of Genetically Modified Foods1203 Words Ã |Ã 5 PagesGenetically modified organisms, sometimes known as GMOÃ¢â¬â¢s, are plants or animals that are created through the process of genetic engineering. Modified foods are often viewed as a valuable solution to ending world hunger, because they take less time to produce into larger crops. The use of gmos have increased in recent years,because they can grow bigger and faster than regular fruits and vegetables in much harsher environments.Also have seem to sustain and fight off many of the pests that have troubledRead MoreBenefits Of Genetically Modified Foods1553 Words Ã |Ã 7 Pages Genetically Modified foods are made when genetic material from the DNA of one species of a plantÃ¢â¬â¢s genes is extracted and forced i nto the genes of different plants in a laboratory. Everything that is living is made of billions of cells. Inside each of these cells there is a nucleus that contains DNA. DNA is what carries the genetic information that the organisms on from one generation to another have to make a new organism and keep it functional. Genes are made of DNA. They make up the partsRead MoreBenefits Of Genetically Modified Foods1350 Words Ã |Ã 6 PagesAbstract Rise of genetically modified foods that are sold to markets were analysed in the areas around USA, Argentina, Brazil and Canada. The aim of this report is to provide a detailed benefits and disadvantages of genetically modified crops where it was observed that it will be good alternative with the advancing biotechnology on overpopulation feeding requirements. Introduction Foods that are produced from organisms that had modification on their DNA structure using methods of genetic engineering
Wednesday, May 6, 2020
During the Roaring twenties, social class was an important aspect of society. All different classes were for the most part separated by where people lived. In other words, by no means would anyone from a lower class be caught in an uptown setting. We will write a custom essay sample on The Great Gatsby Research Paper or any similar topic only for you Order Now There are a variety of characters in the novel that come from different economic backgrounds. In the novel, The Great Gatsby, F. Scott Fitzgerald successfully uses location to differentiate social status amongst his characters while the weather and seasons of those locations help guide them. Each character helps represent and support the differences of social class and the four main locations, The East Egg, the West Egg, the Valley of Ashes, and New York City. In The Great Gatsby geographical locations separate social classes. East Egg represents old wealth. The characters from East Egg are wealthy but empty inside. Their lives are shallow and unfulfilled. Jordan Baker is beautiful on the outside but is only interested in cheating her way through life to get what she wants. The Buchanans look perfect on the outside but are dysfunctional on the inside. The characters in East Egg are arrogant. Ã¢â¬Å"Tom Buchanan is wealth brutalized by selfishness and arroganceÃ¢â¬ (Cowley 71). Ã¢â¬Å"TomÃ¢â¬â¢s restlessness is an arrogant assertiveness seeking to evade in bluster the deep uneasiness of self knowledgeÃ¢â¬ (Dyson 62). Daisy Buchanan is really only interested in herself and will use any means that will ultimately benefit her. West Egg represents new wealth. The characters that live in West Egg have made their money more recently. Nick Carraway is educated at Yale and starts a job in the bond business when he moves to West Egg. Nick is honest and listens to othersÃ¢â¬â¢ problems. In the novel, Nick Carraway is always trying to help his girlfriend Jordan Baker. Her problems revolve around her cheating and being self centered. The characters can also find new wealth through desperate and dishonest means. Jay Gatsby gains most of his wealth through inheritance. Gatsby thinks that wealth will buy him the love of Daisy and the life which he dreams of. In addition Gatsby has also made his fortune through criminal activity, as he is willing to do anything to gain the social position he thinks necessary to win Daisy. The Valley of Ashes represents the socially unaccepted. The characters in the Valley of Ashes represent poverty. Ã¢â¬Å"This is the Valley of Dry Bones, the Waste Land, The dusty replica of modern society, where ash-grey men are crumbling, like EliotÃ¢â¬â¢s hollow menÃ¢â¬ (Bicknell 98). Myrtle and George Wilson both live in a run down garage in the Valley of Ashes. Myrtle Wilson tries desperately to improve her life and get out of the Valley of Ashes. The Valley of Ashes also represents doom and death. Myrtle is found as the victim of a hit and run caused by Daisy and Gatsby. The Valley of Ashes represents the death and dreams for Jay Gatsby, Myrtle Wilson, and George Wilson. These characters die in the novel due to misconception and anger. The characters go through the Valley of Ashes to get to New York City. New York City represents glitz and immorality. While in New York City Tom Buchanan has an affair with Myrtle Wilson. Myrtle Wilson doesnÃ¢â¬â¢t care about anyone except those who will direct her on the correct path to improve her life. This is one of the reasons why she has an affair with Tom. Tom Buchanan has no moral doubts about his own extramarital affair with Myrtle but when it comes to other people such as Daisy and Gatsby he becomes outraged and forces a confrontation. During a party in New York City, Myrtle Wilson drinks too much and begins to taunt Tom about Daisy. Tom responds to this by hitting Myrtle and breaking her nose. New York City represents a passion for money and inhibited pleasure. West Egg represents dreams while East Egg represents the devastation of reality. Jay Gatsby and Nick Carraway both come from the mid-west. The mid-west represents everything that is associated with warmth and home. After leaving the mid-west both Gatsby and Nick move to West Egg which is similar to the mid-west. In contrast, the east represents everything that is shallow and uncaring. Jordan Baker is a prime example of someone who lives a shallow life in East Egg. F. Scott Fitzgerald incorporates color, weather, and seasons into The Great Gatsby. The green light that Gatsby sees every night from DaisyÃ¢â¬â¢s dock represents his future with her. Involuntarily I glanced seaward-and distinguished nothing except a single green light, minute and far away, that might have been the end of a dockÃ¢â¬ (Fitzgerald 21). Every night Gatsby reaches out for the green light in hopes that his longed for dream will finally come true. The green light is in East Egg and even though it is barely visible from his West Egg home he looks for it every night and hopes it will some day be his future. Weather guides the characters actions in The Great Gatsby. Gatsby and Daisy reunite with each other in the pouring rain. This represents the awkwardness of seeing each other again. They fall in love again in the fair weather when the sun begins to come out. This shows that their relationship is blossoming. Seasons also guide actions in The Great Gatsby. Tom Buchanan confronts Jay Gatsby about his affair with Daisy in the heat of the summer. This is similar to the fatal encounter between Mercuito and Tybalt in Romeo and Juliet. George Wilson kills himself and Gatsby when summer turns to fall. In conclusion, The Wilsons and Jay Gatsby never fulfill their dreams of wealth. The Wilsons meet their doom just as the Valley of Ashes symbolizes when George Wilson kills himself and Myrtle Wilson is a victim in a hit and run. Jay GatsbyÃ¢â¬â¢s dream is never fulfilled because money and desperation control him. Ã¢â¬Å"GatsbyÃ¢â¬â¢s death is brought about by Daisy, who first lets him shield her and then deserts him; by Tom, who directs the demented Wilson to the place where he is to be found; and by Wilson himself-a representative of the ash-grey men who comes to Gatsby, in his disillusionment, as a terrible embodiment of the realities which have killed his dreamÃ¢â¬ (Dyson 65). For Tom and Daisy retreat back into their money or their vast carelessnessÃ¢â¬ (Burnam 112). Tom Buchanan lets George Wilson believe it was Gatsby who had an affair with Myrtle and it was his car who killed her. Daisy Buchanan doesnÃ¢â¬â¢t care that she is the one who actually killed Myrtle, allowing Gatsby to take the blame. The Buchanans continue to live behind a facade, ne ver allowing anyone to see their emptiness inside. They blame their actions on others, never taking the blame. The Wilsons are not missed by anyone since their lives represent those that are socially unaccepted. Nick Carraway and Jordan Baker split up and Jordan gets engaged to another man. Nick decides to move back to the mid-west because he is sick of East Egg and its empty values. In each case, location has separated the characters economically, socially, and eventually defined their fate. How to cite The Great Gatsby Research Paper, Essays
Sunday, May 3, 2020
Question: Discuss about theWireless Networking Concepts. Answer: Compare and Contrast Three Data Encryption Standards for Wi-MAX Networks Cipher Block Chaining (CBC) In Cipher block chaining, the Base station (BA) sends the Subscriber Station (SS), an Security Association (SA) specific initialization vector (IV) as a Traffic Encryption Key (TEK) response during the TEK three way handshake. This algorithm uses this Security Association specific Initialization vector in combination with the TEK for the encryption of data traffic. This standard does not provide a full security on data encryption (Garg, 2007). Counter (CTR) The CTR standard is very easy to implement. It encrypts the data parallel and also offers an encryption preprocessing. It is consider stronger than the CBC. But it does not has the capability to encrypted messages authenticity. Counter with CBC Message Authentication Code (CCM) The CCM add more features to CTR by addition of capability of encrypted messages authenticity. It is considered as the most secured cryptographic data encryption standard. The CCM has the following characteristics Providing confidentiality to packet payload and also provides integrity protection to packet payload and packet header. It uses single cryptographic key for providing integrity and confidentiality and thereby minimizes the complexity and also maximizes the performance. Reduction of latency by computation of the cryptographic parameters which are used for the acknowledgement of packets which enables fast comparisons. Minimization of costs by implementing less sized hardware and software. Packet overheads which related to security are small (Garg, 2007). WPAN Technology Security Challenges Wireless USB In wireless USB, there are some criteria about the security. Confidentiality Data should be accessed by the people who are authorized to access the data and make use of it. The data need to be kept as a secret to any entities and that the confidentiality of the data can be preserved. (Chandra, 2008). Availability The servicing nodes should be available to serve the data whenever needed. For many service nodes, this is a challenge. The servicing nodes are prone to DDoS attacks. Even though the servicing nodes are hale and healthy, the servicing nodes under DDoS attack will spend all their resources in responding to DDoS attacks. So they cannot serve the data for what the servers are built. The affected nodes are called as selfish nodes. (Chandra, 2008). Integrity When the data is in travelling losses will be there. The data should be properly identified so that the integrity of the data can be preserved. Authenticity: The users who are asking data should be the correct and genuine people. There are mistaken identities and it will create lot of problems for the sender and receiver. For avoiding this the proper identification method should be used. If there is no authentication, anyone can get access the confidential information or can easily send fake messages to anyone (Chandra, 2008). Now, we are facing challenges with the security which is classified into two categories, security attacks and security services like fault diagnosis. To prevent the attack, we are using key management services, Intrusion detection Techniques and Secure Routing (Chandra, 2008). ZigBee WPAN Technology: The Zigbee WPAN technology transfers the data that can extend up to the 70 meters. The ZigBee WPAN is named as 802.15.4, where the main goal is to monitor and control the software applications, which relatively very low range of information throughput is essential with the possibility of power consumption (Chandra, 2008). The Data transferred in the ZigBee technology is given as packets, which has the maximum size as 128 bytes and it allows the highest payload up to 104 bytes. When comparing to other WPAN technologies, this ZigBee has very high data transfer rate. The Security in ZigBee implements double layers, one for the Network Layer and the Application Layer for Security. The Security policy AES 128b Encryption standard algorithm, which is deployed for the MAC Layer. This implements three types of Keys, namely link, network and master keys (Chandra, 2008). Link Keys The relay as unique key between each pair of nodes. This Link keys are managed and controlled by Application layer. The Encryption standard is performed between all the pair of nodes, so this occupies more memory space (Briere, Ferris, Hurley, 2006). Network Keys Network key is a 128b where all devices can be shared in this network. Network key are formed byTrust Centerand again formed at different interval.To join in the network every node need the Network Key. If the trust center had planned to alter the Network Key, latest one will come through the network Master Keys Master keys are already install in each node. Master keys target is to keeps their Link Keys asprivate. In theKey Establishment Procedure (SKKE) Link key will transfer among two nodes. The pair of nodes will have both link and network keys. The link key is always used, with more security but occupies more memory space. The Two security policy are updated, which the data centers can follow: Commercial Mode: The data centers can transfer their keys between the pair of nodes using the network key. Since, this occupies more memory resources. This offers a centralized model for key security control. Residential Mode: The data centers share only their network key, Due to the low resources, it will be in the ideal mode. This mode is chosen, when the wireless sensor model is implemented. References A survey of WiMAX security threats. (2016).Cse.wustl.edu. Retrieved 27 September 2016, from https://www.cse.wustl.edu/~jain/cse571-09/ftp/wimax2/ Briere, D., Ferris, E., Hurley, P. (2006).Wireless home networking for dummies. Hoboken, NJ: Wiley. Chandra, P. (2008).Wireless networking. Amsterdam: Elsevier/Newnes. Garg, V. (2007).Wireless communications and networking. Amsterdam: Elsevier Morgan Kaufmann.