The SEQUEY HORN CASE free essay sample

Eugene Decker hung up his office telephone and scowled. As part proprietor of the Squeaky Horn, an instrument mechanics shop, Decker was liable for setting the charges for different kinds of fixes. A potential client had quite recently called to ask about the expense to fix the extension on her cello. After Decker provided an expected cost estimate for the activity, the lady had commented, â€Å"Thank you for the statement, however I’ll be going to Best Instrument Repair. I’ve heard they give great help, and their costs are lower than yours.† Unfortunately, Decker had heard comparative explanations ordinarily during the previous barely any months. Since the time Best Instrument Repair had opened across town, Decker and his accomplices had wound up going after business like never before previously. To pull in fix occupations and stay away from cutbacks, Decker and his accomplices had brought down costs for minor fixes without precedent for a long time. We will compose a custom article test on The SEQUEY HORN CASE or then again any comparable subject explicitly for you Don't WasteYour Time Recruit WRITER Just 13.90/page Decker took a gander at the planned versus real working benefit proclamation around his work area (Exhibit 1). How might he determine what bit of the company’s lost benefits was because of the value diminishes and what amount was identified with different elements? Foundation The Squeaky Horn was an instrument auto shop that represented considerable authority in the fix and reclamation of band and symphonic instruments. The shop was claimed and overseen by Decker and two accomplices, who were all around respected for their demanding fix work and meticulousness. Proficient artists from everywhere throughout the nation sent their instruments to the Squeaky Horn for minor alterations or significant upgrades. Requesting show and itineraries put incredible weight on the fragile pieces of instruments, and expert performers were mindful so as to keep their instruments in top condition. Administration Lines As of now, the Squeaky Horn offered four principle administrations: major and minor fixes and reclamations of band instruments, for example, saxophones and French horns, and major and minor This case was set up by Kristy Lilly (MBA ’03) and Liz Smith (MBA ’04), under the management of Professor Mark Haskins. It was composed as a reason for class conversation as opposed to represent powerful or ineffectual treatment of a managerial circumstance. Copyright ï £ © 2003 by the University of Virginia Darden School Foundation, Charlottesville, VA. All rights held. To arrange duplicates, send an email to [emailprotected] No piece of this distribution might be replicated, put away in a recovery framework, utilized in a spreadsheet, or transmitted in any structure or by any meansâ€electronic, mechanical, copying, recording, or otherwiseâ€without the authorization of the Darden School Foundation. ââ€"Å  Approved for utilize just in the course BU607 at Wilfrid Laurier University educated by Chima Mbagwu from Sep 01, 2013 to Dec 30, 2013. Use outside these boundaries is a copyright infringement. THE SQUEAKY HORN UVA-C-2183 fixes and rebuilding efforts of symphonic instruments, for example, violins and cellos. Truly, minor fixes were charged at a pace of $35.00 an hour for band instruments and $32.50 an hour for symphonic instruments. Significant fixes and rebuilding efforts were performed under individual level expense game plans that were cited to clients dependent on the kind of work required for each instrument. The Squeaky Horn’s three proprietors played out every significant fix and rebuilding efforts in the shop. Minor fixes of band instruments were performed by hourly workers, and minor fixes of symphonic instruments were performed by three full-time salaried representatives. What's more, surge employments for minor fixes were at times performed for nearby clients as it were. These occupations were subcontracted to a resigned worker of the Squeaky Horn, who played out the fixes for $25 60 minutes. Surge employments were charged under level expense courses of action that arrived at the mid point of $150 per work. The normal surge work took three hours to finish. The Annual Operating Plan Toward the start of the current year, Decker’s CPA had arranged the yearly working arrangement for the Squeaky Horn (Exhibit 1). The Squeaky Horn’s business was little and generally clear, which empowered the CPA to build up the company’s working spending utilizing explicit volume and income information for every product offering. The accompanying data was utilized in setting up the yearly arrangement: 1. In view of earlier years’ work arranges, the shop was relied upon to play out the accompanying number of employments in the coming year: 390 significant band fixes, 1,830 minor band fixes, 540 significant symphonic fixes, 1,560 minor instrumental fixes, and 50 surge occupations. Normal significant fixes were cited at $400 and $300 for band and symphonic employments, individually. The normal minor band fix took two hours to finish, though the normal minor instrumental fix took four hours to finish. 2. Every one of the three accomplices drew yearly base pay rates of $60,000 in addition to rewards of 5 percent of deals income. 3. The hourly representatives were paid $20 an hour for work performed. 4. The salaried representatives were paid yearly base pay rates of $38,000. To the degree that the quantity of minor instrumental fixes surpassed 1,560, the symphonic repairers were paid a level pace of $80 per employment to finish those fixes. 5. New parts and different supplies were planned at $50 for each significant activity and $10 for every minor activity (counting surge occupations), in view of understanding. 6. Roughly 35 percent of the instruments that the Squeaky Horn dealt with were dispatched to the shop from away. The organization expected to bring about normal delivery charges of $30 per bundle to dispatch the instruments back to their proprietors. 7. Publicizing, deterioration, office lease, and incidental costs were planned as fixed costs. Approved for utilize just in the course BU607 at Wilfrid Laurier University instructed by Chima Mbagwu from Sep 01, 2013 to Dec 30, 2013. Use outside these boundaries is a copyright infringement.

Alexander Hamilton Essay Example for Free

Alexander Hamilton Essay There are four reasons why Alexander Hamilton contended for the improvement of assembling. His first explanation was that assembling would support the economy. The economy would develop monetarily and assembling would cause more exchange. His subsequent explanation was that assembling would cut down duties, which would cause more exchange and employments. His third explanation was that assembling would carry more movement to the â€Å"Young America†. With the new populace it will grow America and open more territories for exchange. His last explanation was work. Having assembling would make more occupations through cultivating and production lines. Alexander Hamilton’s method of helping the United States Government was savvy. Hamilton contemplated that helping the Government would make sure about American autonomy. He felt that the United States expected to have a sound approach of empowering the development of assembling and simultaneously he needed to ensure that the United States’ future was as yet solid. He contended for the improvement of assembling since he accepted that he could accomplish the endowments of the economy by parting with taxes. He felt that in the event that the United States government gave high levies, at that point nobody would need to exchange with the United States. He additionally accepted that his polices would help exchange as well as help different shortcomings of the economy, for example, work and movement. These approaches would advance the development of assembling as well as give enhanced work openings and advance migration into the â€Å"Young America†. They would likewise extend the utilizations of innovation and science for all quarters of the economy, including agribusiness. The Industrial Revolution was the most significant improvement during the nineteenth century. It brought numerous progressions towards American Life. Another class of modern architects sorted out the land, work, mineral assets, and capital of the country, to expand both the creation and benefit. There were numerous new innovations in, transportation and correspondence, and in the utilization of the mechanical production system strategies that made the development of gigantic, broadly based ventures with huge money related and political impact. A gathering of little free ranchers, create laborers, and vendors became one major business for modern focuses. Migrants and ranchers the same filled enormous modern places to seek occupations.

Orem’s General Theory of Nursing Essay

Hypothetical Framework As per Orem’s General Theory of Nursing, the hypothesis of self consideration deficiency results when self consideration organization isn't satisfactory to satisfy oneself consideration need. In addition, it clarifies when individuals need nursing care and how individuals can be helped. In connection with Mrs. DNB, she can't play out any self consideration activities as a result of her intricacies. Our job as a medical caretaker is to help and meet oneself consideration needs of our patient by controlling and coordinating to forestall any further contamination, offering physical or mental help and keep up a tranquil situation to recoup from their disease. We as medical attendants should encourage our patient for them to figure out how to perform self consideration estimates which is significant for their recuperation. OREM SELF-CARE DEFICIT THEORY Orem’s reason for building up the Self-Care Framework was two-overlap: she was attempting to locate the importance of nursing and to build up an assortment of nursing information in rendering care to the patient. Orem hypothesis has concentrated on the starting advancement of logical information in the field of nursing. In her hypothesis, Orem characterizes the four ideas that establish nursing’s metaparadigm, for example, wellbeing, nursing, condition and individual. Wellbeing In tending to the idea of wellbeing, Orem says wellbeing and solid are terms used to portray living things. It is the point at which they are fundamentally and practically entire or sound life. She further explains her situation by characterizing wellbeing as â€Å"a condition of physical, mental, and social prosperity, and not just the nonattendance of illness or sickness. NURSING-Orem considers nursing to be â€Å"an craftsmanship through which the professional of nursing gives particular help to people with handicaps of such a character, that more prominent than standard help is important to address every day issues for self consideration of their patient. Nursing comprises of activities intentionally chose and performed by medical attendants to support people or gatherings under their consideration to keep up or change conditions in themselves or their condition. Condition Orem considers condition to be enveloped by two dimensionsâ€physical, synthetic and biologic highlights and financial highlights. Physical, synthetic, and biologic highlights incorporate things, for example, air, contaminations, climate conditions, pets, irresistible living beings and so forth are significant in helping your customer recoup from their condition. Person Orem’s work in her humanistic class, the Self-Care Framework is most properly positioned in the formative classification of information since it tends to self-care organization, self-care deficiencies, and helpful requests as they present all through life.

Analyzing the Flesh and the Spirit by Anne Bradstreet

Examining the Flesh and the Spirit by Anne Bradstreet Five Literary Criticisms Since the beginning, there have been numerous strict beliefs and practices that point a similar objective in various manners. One of them was Puritanism and the Puritan accepted that the most ideal approach to pick up admission to paradise was to concentrate on how corrupt they were. Anne Bradstreet was the primary Puritan figure in American Literature and in her sonnet titled The Flesh and the Spirit, she talked about Puritan rehearses. This exposition will investigations the sonnet with 5 artistic reactions, including Marxist Criticism, Feminist Criticism, New Criticism, Reader-reaction Criticism, and Psychoanalytic Criticism. Beginning with the Marxist Criticism, we have to take a gander at the times financial conditions first. Anne Bradstreet lived in the Massachusetts Bay Colony and the settlement was exceptionally reliant on the import of staples from England. The Puritan abhorrence of garishness drove the settlement to likewise control uses on what it saw as extravagance things. Things of individual enhancement were disliked. In the sonnet, we see two characters talking about what sort of life individuals ought to have. The sister named Flesh attempts to disclose to her sister named Spirit that the World has everything that could keep them glad and substance. Fleshs this sort of way to deal with the natural products is absolutely against Puritan accepts. As the province Bradstreet lived in as of now disliked extravagance things, the sister Spirit says, My Crown not Diamonds, Pearls, and gold,/But, for example, Angels heads infold. Here, she implies that she doesnt have a realist character. The writer, Bradstreet, mirrors her colonys world-see for the monetary issues in those lines. At the point when we attempt to examine this sonnet utilizing the Feminist Criticism, we essentially need to pose a few inquiries with respect to artists sex, training, and afterward take a gander at the characters. The writer was a lady. Furthermore, when we read her memoir, we see that she didnt go to any school yet was instructed by his dad. This illuminates us that she lived in a male-prevailing society since young ladies didnt go to class regardless of whether her dad was a steward. The characters in the sonnet are likewise young ladies and they examine strict issues. Here, the creator breaks the male-prevailing society and makes her female characters question the strict issues, particularly the Puritanism. At the point when the subject is religion, one shouldnt even inquiry the most immaterial thing. Be that as it may, the sister Flesh addresses it and all she says is absolutely against the Puritanism found in the artists settlement. Since the writer herself is a lady, we can e xpect that a lady talks about a strict practice in a male-predominant society. Breaking down a sonnet with New Criticism requires an individual not to take foundation data of the writer, artists different works or the story in the sonnet into thought. At the point when we read what Spirit says about natural products and how she reprimands what Flesh asserts that individuals need to appreciate them, we can comprehend that this sonnet mirrors the Puritan convictions. Words utilized in the sonnet have a place with the English expressed in any event 350 years back. Similitudes were additionally utilized in the sonnet. The character Flesh is an illustration for natural things, for example, jewels, pearls, and gold. The sonnet isn't likewise in a verse structure. It would seem that a mass of content. This implies the writer didnt need to isolate what is needed to mean. It implies that the sonnet is about something very similar. Rhymes utilized in the sonnet likewise makes it sound better and that way it draws in perusers consideration. At the point when I attempt to break down this sonnet as a peruser with the Reader-reaction Criticism, I can legitimately say that this sonnet is about Puritanism; thusly, religion. Since Spirit is by all accounts increasingly predominant in the sonnet, the writers condition is a Puritan culture. Id state this sonnet isn't not quite the same as different strict sonnets since they all point one objective: Heaven. It is the manner in which they talk about what to do so as to go to Heaven. Tissue is by all accounts a heathen character whom perusers ought to keep away from. I dont know whether its alright to accuse a character to laud a religion or strict practice, yet this sort of conduct would make me progressively uninterested in that religion or practice. As the stanzas state, No Candle there, nor yet Torch light,/For there will be no darksome night. they simply stable to be noteworthy sentences that draw in individuals to that religion the same than that of all religions have. To dissect this sonnet with the Psychoanalytic Criticism, we have to break down the characters contemplations, their feelings of dread, and what they do to stifle their fears.â When we see what Spirit says in the sonnet, we can comprehend that her center issue is dread of God; along these lines, she embraced the Puritan convictions so as to go to Heaven. Then again, Flesh is only inverse of Spirit. She shows everything that is against dread of God. This can likewise be deciphered to be a shirking as her safeguard system, since she attempts to dodge any strict musings and need to appreciate every single natural joy. To summarize, this exposition attempted to dissect the sonnet titled The Flesh and the Spirit by Anne Bradstreet with 5 scholarly reactions. With the Marxist Criticism, we took a gander at the times monetary conditions and attempted to reflect Bradstreets colonys world-see for the financial issues in her sonnets refrains. Utilizing the Feminist Criticism, we attempted to clarify how Bradstreet broke the man-ruled society and utilized her female characters to talk about strict issues. With New Criticism, we attempted to show metaphors and what the sonnets structure implies. Peruser reaction Criticism was utilized to clarify what the creator of this paper comprehended from the sonnet. Lastly, with the Psychoanalytic Criticism, we attempted to distinguish characters center issues and their protection systems.

Elements of interpersonal relationships

Hypotheses of Aging Essay Significant hypotheses of maturing according to the improvement of a person As an individual develops more established they get progressively pulled back from the remainder of society. The general public really dismisses more seasoned individuals from a great deal of exercises. It is a piece of becoming more established and it is a method of separating yourself from individuals before you bite the dust. In this manner the two significant speculations look at what makes an individual separation themselves from this the remainder of the individuals. The social separation hypothesis essentially looks at the advancement of an individual and how it impacts their improvement as they become more established. The action hypothesis of maturing looks at how an individual keeps on being joined to their typical everyday practice of life. The two speculations propose two unique things which two distinct people may affect. The social separation hypothesis would influence the character of an individual since they are withdrawing from the remainder of the general public and they become lonelier. Forlornness would affect in their lives since they have nobody that pays enthusiasm to what they need and what fulfills them. When the individual segregates themselves from the remainder of the general public, everyone who was close separations themselves. The social separation hypothesis recommends that it is typical for more seasoned individuals to pull back from the general public and it turns out to be a piece of their life. This would not be exceptionally exact in light of the fact that it makes the individual be progressively focused. They would be progressively focused on in light of the fact that they are separating from the general public and they are getting hold of the way that they may be kicking the bucket and no one thinks about their reality any longer. This would be discouraging to the individual and it would be progressively proper that they be dynamic as an opportunity to live would be less and it would be more beneficial not to be pushed and discouraged from being forlorn and withdrawing from the general public. The recommendation of the separation hypothesis doesn't assist the person with feeling great about them yet it causes them to feel that they are being segregated and they are getting hold of the reality of death. The movement hypothesis proposes that an individual keeps on feeling extraordinary about their disposition towards their life. This encourages the person to want to be sure about their life. The movement hypothesis proposes that an individual’s confidence isn't influenced by maturing as long as exercises e. g. work are supplanted with new exercises. The more the individual mingles the more they have a functioning life and they are more joyful in their in mature age. This doesn't cause the person to feel that they are as a rule forgot about in light of the fact that they are actually associated with the exercises that cause them to feel more joyful in their lives. The action hypothesis has an effect in the advancement of an individual in light of the fact that the more they are glad at their mature age; the more they get the chance to invest as much energy with close family members and companions. This is helps significantly in the advancement on the grounds that the individual can see that individuals are there for them and it gets simpler for the person to settle effectively to that they may bite the dust. The acknowledgment of their demise causes the person to be more joyful and they need to carry on with their life without limit. The hypothesis accept a positive connection among movement and life fulfillment. Action hypothesis mirrors the functionalist see that the parity that an individual creates in middle age ought to be kept up in later years. The hypothesis predicts that more established grown-ups that face job misfortune will substitute previous jobs with different other options. This would assist them with continueing their day by day lives as ordinary. This would be an enormous preferred position to the person than withdrawing from the general public. This is so in light of the fact that they get the opportunity to be fit in their physical make-up, that’s in the event that they decide to begin having an activity routine or they might need to take up course since they want to grow their insight. In the event that the individual withdraws from the general public, it gets hard for them to take part in any type of exercises. The social withdrawal hypothesis may be the main alternative of the individual in the event that they are truly panicked of being out. This would likewise be a choice if the administration client feels that they are better in that circumstance when they have no loved ones. In this manner the social separation hypothesis would be an alternative if the administration client doesn't like their confidence. The action hypothesis is best hypothesis since it keeps the older individual in contact with all the fixings and everybody that is around them. In this manner private homes ought to urge administration clients to truly and intellectually dynamic as it would add to their public activity in the general public.

(An Incomplete Guide to) Summer Opportunities for MIT Students

(An Incomplete Guide to) Summer Opportunities for MIT Students This past Friday was the MIT career fair, a huge event where hundreds of companies send recuiters to set up booths at MIT. It fills up an ice rink, a track, and a basketball court; over 4000 students attend. Its preceded and followed by a lot of info-sessions, panels, networking events, and anxiety. Last year, I went to the career fair with the primary intention of nabbing as many free t-shirts as possible (33, in case you were interested); I attended company talks primarily for the free meals. I spent my freshman year actively avoiding thoughts of Real Life. Jobs, internships, résumés: I was having none of itmy focus was on adjusting to the new environment and making friends rather than the career grind. Over the summer, it dawned on me that I would actually be eligible for many internships this summer and that I should perhaps fix the formatting of my résumé and invest in some business-casual clothing. And so, before the summer had even ended, I was already preoccupied with plans for the next. I find it crazy that recruiting season is so early in the semester, but at this point I’m just rolling with the punches and hoping the early start points to an early finish; I’d really like to have more time to focus more on classes, community, and personal growth. I’m far from having it all figured out, but here are some steps that I’ve taken this semester: 1) Applying to externships The deadline this year was September 23, but this program runs every year. These are mini-internships, or externships, held over IAP; each externship is hosted by an MIT alum. More information is on this page, but you essentially look through the listings and decide on three to apply to. If youre so inclined, you can attend an info-session to learn more or ask questions. You need a résumé, often a cover letter, and often an unofficial transcript. 2) Having my résumé critiqued A lot of clubs hold critique events in September, as does GECD, MIT’s Global Education Career Development office. GECD has generous drop-in hours in the weeks preceding the career fair, and my fifteen-minute meeting was helpful. 3) Attending company presentations I have a vague sense of what different industries do and what types of majors lead to which industries, but when looking for an internship, it’s very important for me to have a sense of what employees’ everyday responsibilities are and what kinds of problems theyre working on. At these presentations, you get the chance to hear directly from employees and to talk to them afterwards, which is really helpful when youre trying to narrow down potential options. 4) Career fair This is the obvious one. Because it was my first time actually trying to sell myself, I had only a vague sense of whether I was doing it well, but I scoped out the list of companies beforehand and had a rough idea of what industries I was interested in. I did some background research, prepared questions, asked about internship openings, dropped a lot of résumés, and so on. Career fair day is typically a student holiday, but MITs start date was pushed back a week this year due to a late Labor Day; to compensate, we had classes on the day of the career fair this year, which led to a lot of running around campus and scrambling to turn in psets on time. So it was quite a hectic day. But what if you dont want to apply for internships? What if you dont want to apply for internships right now? Completely understandableit is, after all, reaching the point in the semester when everything else is suddenly picking up and becoming overwhelming. Alternatively, what are you supposed to do if youre a freshman with little work experience? What if you blew off the career fair? How on earth did I manage to find something to do last summer that wasnt lie on my couch and admire my collection of free American Apparel t-shirts? 1) If your apprehension stems from self-doubtstill apply! You never know how things will turn out unless you try. Obviously, if you have none of the required qualifications, it might be worth working on building those skills so that you are a viable candidate in future years. 2) Go abroad with MIT. A lot of programs (SMURF, MISTI, MISTI GTL, IROP, to name a few) are wide-open for freshmen (and upperclassmen!) looking to gain some research/work/teaching experience and see other countriesimmersing yourself in the culture of another country really broadens your worldview and gives you the opportunity to learn about other cultures, see beautiful places, and connect to people you never wouldve met otherwise. Many of these programs have language requirements. But many don’t. A lot of the due dates are rather early and can fly past; last year, I missed many of the deadlines, but I did still catch the one for IROP, which took me to Hong Kong for the summer. Also, Im pretty sure that if you independently find a lab or company in a MISTI country, you can contact the MISTI staff about being part of the program. As a freshman, the main issue you’ll run into will probably be finding professors to write your letters of recommendation, (though I’ve been told that you can sometimes delay handing these in until you’ve spent a little more time at MIT). I don’t think I did a very good job of building these connections during my freshman yearâ€"partially due to large GIR lectures and partially because I’m more of the sit-silently-and-get-good-grades type1â€"but please dont be like me! I dont even want to be like me in this regardâ€"go to office hours and talk to professors! If you, like me, think office hours are primarily for clarifying pset problems and wonder how it’s even possible to impress your professor while asking a question they might find totally trivial2, MIT also funds student-faculty dinners (or at least they did last year). These can be a good way to learn more about your professor, his/her research, and his/her interests outside of what is taught in class. 3) If you can spare the time, find an interesting UROP during the semester. These can help you get a sense of what kind of work you are/aren’t interested inâ€"although some UROPs have prerequisites and requirements, many dont or are flexible! And the opportunities certainly reach beyond what is listed on the siteâ€"I found my first UROP by emailing around the Media Lab. Many students also find UROPs for the summer or stay on campus to continue working on their semester UROP over the summer. Incidentally, if you apply before the deadline for direct funding, it’s also a nice way to earn a little extra spending money. Furthermore, it puts you in direct contact with a graduate student and possibly the professor who is the PI of the lab. I found that having a faculty member who had seen my work ethic in action was very helpful for letters of recommendation. 4) Some companies have programs for freshmen. Off the top of my head, I know that Google, Microsoft, and Facebook host such programs, but I bet there are more, and there might be companies outside of the tech/EECS realm3 that also offer such programs or hire freshmen. 5) Ask your advisor about programs within your major, or do some research online. For example: course 3 has an internship program. So does course 17 (including the MIT-Washington program, which is open to students of all courses). Looktheres a big list here! 6) There will be more career fairs later in the year. See this list. 7) Apply to MITs programs for professional devleopmentIm aware of F/ASIP and UPOP, professional development programs for freshmen and sophomores, respectively, but there must be more out there, which will probably be publicized via email. 8) Do something else. It can be completely off the grid. One of my good friends from MIT spent a good part of the summer hitchhiking up the west coast, and shes doing just fine. But really, it doesnt even have to be something that takes a lot of gumption or energy. Read, talk, bathe, lie in the sun, dance. Work on somethingor dont. You will be fine. Finally, if you have an idea for independent summer research or want to spend time abroad for something related to your education, MIT offers a lot of opportunities for students to receive funding. The Kelly-Douglas Fund is dedicated to helping students (only sophomore+, unfortunately, though freshmen with sophomore standing also qualify) travel over IAP or the summer in order to pursue HASS-related interests. The Peter J. Eloranta Undergraduate Research Fellowships fund novel research ideas. More funding opportunities are listed on this GECD webpage. In summary: Programs/opportunities MIT-Washington SMURF MISTI MISTI GTL IROP UROP (during year or summer) Externship (during IAP, deadline has passed for this year) GECD (not a program per se, but helpful for preparation) Future career fairs List of lots of internships, including departmental programs F/ASIP UPOP Funding Kelly-Douglas Fund (not open to freshmen, except those with sophomore standing in the spring semester) Peter J. Eloranta Summer Undergraduate Research Fellowships Other funding As you can probably tell, the list could go on and on. Its also really useful to ask upperclassmen and classmates what they did and go from there, but so many of these MIT webpages are so underappreciated! This post is just a rough introduction to whats out there. Good luck! 1 This was in large part because I was confused about what I wanted to study. I thought I’d be a computer science major and ended up taking a lot of CS classes my freshman spring, but I wasnt very excited about any of them. Eventually, I realized I was more interested in theoretical problem-solving and the humanities. This is another post for another time, but I wanted to explain that this year I’m taking classes that I would be more inclined to think about casually; I’m hopeful about the prospect of building more meaningful connections within my major this year. 2 Maybe this is because I’m a math major and it’s hard to have casual conversations about material from math class the way that a bio major might, say, talk about a medical technique related to something he/she learned in bio class. 3 Possibly Bank of America and Jane Street, if I overheard correctly at the career fair.

The Economic Recession of 2007 Essay - 825 Words

The Economic Recession of 2007 (Essay Sample) Content: The Economic Recession of 2007Name of StudentCourseName of InstructorDate of SubmissionPaper outline * Introduction * Background of the economic recession of 2007 * Main point No. 1: The search for higher profits * Main point No. 2: The misconception of the risk * Main point no. 3: A lax in the financial regulations * Main point number 4: The bursting of the United States of Americaà ¢Ã¢â€š ¬s housing bubble * Thesis statement: Although the 2007 economic recession could be attributed to several factors that include, the laxity in the financial regulations, the misconception of the risk and the bursting of the U.S. housing bubble are arguably the leading causes of the economic recession. * Causes of the 2007 economic recession * Body paragraph No. 1: The Search for higher profit * Body paragraph No. 2: The misperception of risk * The lax in financial regulation * bursting of the US housing bubble * The Impact of the crisis * The fall in the economy * Unemployment * Collapse of major financial institutions * Measures that can be taken mitigate the impact of the crisis * Introduction of macro-economic policies * Labor market measures to reduce effects of the crisis on the workers * ConclusionThe Economic Recession of 2007IntroductionAs from 2007 to towards the end of 2009, there was a severe economic crisis in the United States of America. The impact was also felt by other nations of the world. The crisis, according to economic observers was caused by a combination of factors that include the increase in credit and the housing bubble. It started when the market suddenly cut off its usual funding to some of the key commercial entities in the United States (Acharya and Richardson 2). In my view, despite the fact that the 2007 economic recession could be attributed to several factors, the laxity in the financial regulations, the misperception of several financial risks and the bursting of the countryà ¢Ã¢â€š ¬s housing bubble are unarguably the leading causes. This paper shall discuss each factor and then identify measures that could have been taken to mitigate the effects of the crisis.The Causes of the 2007 Economic RecessionNotably, four core, but interrelated factors were the primary causes of the 2007 economic downturn. The factors are, first, most banks took no precaution while issuing unprotected loans; secondly, there was no regulation that governed the financial system and high-interest rates on house loans. The final factor is the imbalance in the global economics.The aforementioned factors contributed to the crisis in the following ways. First, the misperception of the risk and the negligent financial regulation enabled banks to involve in risky economic activities. For instance, Investors were motivated to expand their businesses because government bonds attracted low-interest rates. Consequently, after exhausting the credit-worthy borrowers, they turned to riskier segments of the market and other non-stand ard loans (Thomas et al. 1).Secondly, the lax regulations in the financial sector enabled financial institutions to participate in risky ventures without any precautionary measure. Unrestricted lending was encouraged by political authorities who wanted to enhance ownership rates among the disadvantaged and low-income groups (Thomas, et al. 2). Thus, the inability of the creditors to service their loans nearly led to the collapse of the financial institutions, leading to the 2007 financial crisis.Thirdly, since there was an unprecedented increase in the housing rates, the delinquency rates on home loans began to appreciate towards 2006 and gained momentum in 2007 (Sher and Iyanatul 62). When there was a burst of the housing bubble as a result of high-interest rates and less demand for houses, the crisis began. Consequently, most mortgage lenders failed because of the bad loans that people could acquire from the subprime markets. In 2007, most banks and other financial institutions w ere affected when they experienced defaults in loan repayment.According to Ockree and James, in mid-2007, financial institutions started to hoard liquidity thereby leading to the freezing of the market for asset-backed commercial paper (36). At this time, the economy had started feeling the impact of the credit crunch.Impact of the crisisThe financial crisis did not just impact on US economy, but also around the world by both advanced and developing economies. Among the effects included the meltdown in the subprime mortgage market, the repercussions of the financial crisis and the ensuing credit crunch (Acharya and Richardson 3). Because of this, there was a significant slowdown in the United States economy (Sher and Iyanatul 46).The impact was also felt by the middle-income countries including those in Central and Eastern Europe. In some Commonwealth states, the effects of the crisis were mainly driven by the combination of the credit crunch and the domestic imbalances.The depress ion also had a bearing on the household-wealth in the United States and other foreign nations. In America, the household-wealth declined by 17 percent in 2007-2008 (Thomas, et al. 7). The rate of unemployment also increased after the collapse of m...

Information Wireless Networks - Free Essay Example

Sample details Pages: 20 Words: 5963 Downloads: 1 Date added: 2017/06/26 Category Information Systems Essay Type Narrative essay Did you like this example? Abstract With present advances in technology, wireless networks are getting more popularity. These networks let the users the liberty to travel from one location to another without disruption of their computing services. The Ad-hoc networks, are the subset of wireless networks, let you the configuration of a wireless network without the require for access point. Don’t waste time! Our writers will create an original "Information Wireless Networks" essay for you Create order Technology under development for wireless ad hoc networks has quickly become a crucial part of our life since it provides â€Å"anytime, anywhere† networking services for mobile users. Wireless ad hoc networks can be dynamically set up without relying on any pre-existing infrastructure, such as Public Key Infrastructure, and central management for communications. However, such infrastructure-less characteristic of the networks also makes them vulnerable to security attacks. Numerous protocols have been planned in order to attain a high degree of safety based on a mixture of human-mediated communication and an normal Dolev-Yao communication medium. One of which is the Symmetrised Hash Commitment Before Knowledge protocol or the SHCBK protocol ( A. W. Roscoe and Long Nguyen, 2006). The protocol design seeks to optimise the amount of security that the humans can attain for a known quantity of work. This dissertation presents an implementation of the SHCBK protocol for securing ad hoc networks over Wi-Fi through†¦..main chapters. The first chapter contains†¦ The second†¦Ã¢â‚¬ ¦..The third†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ The forth †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Chapter 1 Introduction A wireless ad hoc network is a de-centralized wireless network. The network is called ad hoc for the reason that each hop is ready to send onward data for other hop, and so the resolving that which of hops will send the data to the forward hops is dynamically established on the network connectivity. This is in dissimilarity to wired networks in which routers execute the duty of routing. It is also in difference to organize the wireless networks. In which a particular node recognized as an admission point manages communication among other nodes. All taking part parties in an ad hoc network have the same opinion to recognize and send onward messages, to and from each other. With this type of elasticity, wireless networks have the capability to form anyplace, at any occas ion, as long as two or more wireless users are enthusiastic to have the communicate between them. Mobile nodes inside an ad-hoc network move from one location to another. However, finding ways to model these movements is not obvious. In order to evaluate an ad hoc network performance it is necessary to develop and use mobility models that accurately represent movements of the mobile nodes. In this paper we present performance evaluation of various entity mobility models in terms of the traveling patterns of mobile node. MANET is a self-configuring network that is formed automatically via wireless links by a collection of mobile nodes without the help of a fixed infrastructure or centralized management. The mobile nodes forward packets for each other, allowing communication among nodes outside wireless transmission range hop by hop. Due to dynamic infrastructure-less nature and be deficient in the centralized monitoring points, the ad hoc networks are susceptible to attacks. The Atta cks on the ad- hoc network routing protocols can disturb the network performance and dependability. Wireless networks use radio waves to broadcast the signals and survive in essentially two dissimilar flavors, communications and ad-hoc. In communications mode all traffic is transmitted among The HOPs via an admission point which controls the network and gives it with the safety system. The most usually used normal for wireless networks is the 802.11 principles or Wi-Fi which in fact is not a standard but a entire relatives of principles using the same protocol. The safety in wireless networks by Wi-Fi consists of WEP, WPA and now lately WPA2 which is essentially a ended version of WPA. WPA was shaped as an middle safety system while WPA2 was finalized and experienced since the preceding system contained several serious weaknesses. Benefits and applications of ad-hoc Networks Ad-hoc networking need not want any admission points as contrasting to wireless networks in Communic ations mode. This makes them functional in a set of diverse applications. It is mainly used in Military applications and in save operations where the accessible communication communications Has been damaged or is unavailable, for example later than earthquakes and other disasters. But ad-hoc is these days also being used in a lot of commercial applications. Like we see that mobile phones and PDAs using the Bluetooth protocol system, seeing as it is quick and fairly simple to setup and doesnt need any additional tools. Characteristics and standards of ad-hoc As the wireless standard 802.11 does hold up ad-hoc networks, it is extremely limited since it doesnt offer routing among the nodes, so a hop can only arrive at the straight noticeable nodes in its place protocols similar to the Ad-hoc, On-demand Distance Vector protocol or Dynamic Source Routing protocol can not be used. These routing protocols are so called immediate routing protocols, sense that it gives a route to a tar get only when wanted. In difference the other usually used routing protocols on the Internet are practical sense that they will set up routes separately of the traffic in the network. This implies that the reactive network is quiet pending a connection that is wanted and thus lessens the overcrowding in the network. DSR is an even additional optimized protocol which doesnt need for the sending forwarding computers to have current routing tables but have a list of network addresses in the form of the packet. The protocol because of eavesdrops the limited network traffic and listens for this routing data and information included in the packets and adds it to its personal routing table. One of the major goals when scheming mobile ad-hoc networks where the nodes go about and the topology rapidly alters is to defend the network connectivity among the hops over potentially multi hop channels. To obtain multi hop connection you must offer one-hop connectivity throughout the link-layer a nd expand that to multi- hop connectivity throughout routing and data that is forwarding protocols in the network-layer. Many corporations make substantial investments in their wire- less infrastructure. For example, Microsofts IEEE 802.11 based Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy or else, to republish, to position on servers or to redistribute to lists, requires prior specific permission and/or a fee. Wireless (Wi-Fi) network consists of approximately 5,000 access points (APs) supporting 25,000 users each day in 277 buildings, covering more than 17 million square feet [10]. In addition to the equipment costs, the costs of planning, deploying, and maintaining such networks is substantial. Thus, it is important to develop infrastruc ture that improves the ability of Information Technology (IT) departments to manage and secure their wireless networks. In recent years, researchers have uncovered security vulnerability- ties in Wi-Fi networks [20]. They showed that the Wired Equiv- agency Protocol (WEP), the popular 802.11 security mechanism that most corporations were using at the time, was fundamentally flawed. In a series of highly publicized papers, they showed that 802.11 networks could be compromised easily. The community reacted quickly by developing and deploying alternate security so- lotions including VPNs, IEEE 802.1x [30], several variations of EAP [14], Smart cards, and more recently WPA [29]. Yet, the wire- less LAN (WLAN) security problem was not completely resolved. Last year, Microsoft conducted a series of interviews with WLAN administrators of several large and small organizations [10]. The goal of these interviews was to understand the difficulties involved in deploying and managing corpo rate WLANs. The issue of WLAN security came up repeatedly during these interviews. All administrators felt that WLAN security was a problem. They were unhappy with the quality of the tools they had at their disposal. Many of them would periodically walk around their buildings using WLAN scanning software looking for security vulnerabilities. Some hired expensive outside consultants to conduct security vulnerability analyses of their WLAN deployment, only to conclude that what they really needed was an on-going monitoring and alerting system. Most administrators believed that better systems to manage WLAN security are needed. Even after protocols such as IEEE 802.1x and WPA are deployed, corporate networks can be compromised by off-the-shelf 802.11 hardware and software. For example, an unauthorized AP can be connected to the corporate Ethernet, allowing unauthorized clients to connect to the corporate network. The rogue AP may be con- nected by a malicious person or, as is more o ften the case, by an employee who innocently connects an AP in his office without realizing that he is compromising the corporate network. A rogue AP can circumvent the elaborate security measures that the IT department may have put in place to protect the companys intellectual property. To test our assertion that people inadvertently compromise the security of their networks, we conducted an experiment in two large organizations that had secured their WLANs using one of the methods mentioned previously. We walked around with a WLAN- enabled laptop in a small section of the two campuses looking for APs to which we could connect. Chapter 2 SECURITY ATTACKS Here I attempts to provide a comprehensive overview of attacks and secure routing. It first analyzes the reason that ad hoc network is vulnerable to attacks. Then it presents the well known attacks and the popular secure protocols. Is out of its radio range, the cooperation of other nodes in the Network is needed. This is known as multi-hop communication. Therefore, each node must do something as both a host and a router at the same time. In most wireless networking environments in productive use today the users devices communicate either via some networking infrastructure in the form of base stations and a backbonenetwork,ordirectlywiththeirintended communication partner, e.g. by means of 802.11 in ad hoc networks In distinction a mobile ad-hoc network is a self-configuring network that is formed automatically via wireless links by a collection of mobile nodes without the help of a fixed infrastructure or centralized management. Every hop in the mobile ad-hoc networks is ready with a wireless transmitter and receiver, which allow it to communicate with other nodes in its radio communication area. Hops are more often share the same physical media. They broadcast and obtain signals at the same frequency band, and chase the same hopping series or spreading code. If the purpose node is not inside the broadcasting range of the sending node, then the sending node takes help of the intermediate hops to communicate with the purpose node by relaying the messages hop by hop. Fig.2 describes the Mobile ad-hoc network. In order for a node to forward a packet to a node that TYPES OF THE SECURITY ATTACKS Securing wireless ad hoc networks is a highly demanding issue. Due to dynamic scattered infrastructure-less nature and be deficient in of centralized monitoring points, the ad hoc networks are susceptible to a variety of attacks. Ad hoc networks have to manage with the same kinds of vulnerabilities as their wired counterparts. As well as with new vulnerabilities specific to the ad hoc context. In addition, conventional vulnerabilities are also accentuated by the ad hoc paradigm. Initially, the wireless channel is available for the both genuine network users and cruel attackers. The ad hoc networks are vulnerable to attacks ranging from static eavesdropping to active prying. Seco ndly, the be short of an online CA or Trusted Third Party adds the complexity to organize security mechanisms. Thirdly, mobile devices be inclined to have limited power consumption and calculation capabilities which make it more vulnerable to Denial of Service attacks and incapable to execute computation-heavy algorithms like public key algorithms Fourthly, in MANETs, therearemore probabilities for trusted node being compromised and then life form used by adversary to launch attacks on networks. Lastly, node mobility and recurrent topology changes enforce frequent networking reconfiguration which creates more chances for attacks, for example, it is difficult to discriminate between stale routing information and faked routing information. Ad -hoc networks attacks can be differentiated as passive and active. Passive attack signifies that the assailant does not send any message, but just listens to the channel. Passive attacks do not disturb the process of a protocol, but only ma kes the attempts to find out valuable information. Active attacks may either being directed to disturb the normal operation of a exact node or target the performance of the ad hoc network as a whole. For passive attacks, the attacker listens to the channel and packets that are containing clandestine information might be eavesdropped, which violates privacy. In a wireless environment it is usually not possible to notice this attack, as it does not create any new traffic in the network. Active attacks, counting injecting packets to unacceptable destinations into the network, deleting packets, changing the contents of packets, and impersonating other hops infringe ease of use, veracity, verification, and non-repudiation. Different from the passive attacks, active attacks can be detected and ultimately avoided by the legal nodes that contribute in an ad hoc network . We broadly classify these attacks as passive and active. The classification is important for understanding the strengt hs and limitations of the DAIR security management system. Eavesdropping Eavesdropping is a passive attack. The attacker passively listens to the traffic on the wireless network and gleans useful information. The listener may use sophisticated code breaking techniques. Countermeasures include use of better encryption techniques as well as physical security measures such as use of radio-opaque wallpaper. Passive attacks are difficult, if not impossible, to detect and we do not address them in this paper. Intrusion Any attack that allows a user to gain unauthorized access to the network is called an Intrusion attack. Intrusion attacks are active attacks and several such attacks are possible. An attacker can compromise the corporate network by gaining physical access to its wired network and connecting a wireless AP to it. The AP creates a â€Å"hole† through which unauthorized clients can connect, bypassing the elaborate security measures that the IT department m ay have put in place. A similar attack can be carried out by using ad-hoc wireless networks instead of APs. A corporate network may also be compromised when an attacker finds and uses an unsecured AP connected to the network by an unsuspecting employee. The widespread availability of inexpensive, easy-to- deploy APs and wireless routers has exacerbated this problem. As mentioned earlier, we found several unsecured APs in large organizations. The DAIR security management system can detect both rogue APs and rogue ad-hoc networks. Another way a corporate network can be compromised is when an attacker obtains the credentials (e.g., WEP passwords, IEEE 802.1x certificates) needed to connect to the corporate network. The DAIR security management system can not currently detect such attacks. Denial of Service (DoS) Denial of Service attacks are active attacks. A diversity of DoS attacks are possible. Some DoS attacks exploit flaws in the IEEE 802.11 protocol. For example, a disassoc iation attack is where the attacker sends a series of fake disassociation or deauthentication messages, causing legitimate clients to disconnect from the AP. In a NAV attack, the attacker generates packets with large duration values in the frame header, thereby forcing legiti- mate clients to wait for long periods of time before accessing the network . In a DIFS attack, the attacker exploits certain timing- related features in the IEEE 802.11 protocol to aggressively steal bandwidth from legitimate users. In all three cases, the attacker transmits packets in an abnormal way, either by generating non-compliant packets, or by transmitting compliant packets at an abnormally high rate. The DAIR security management system can detect such attacks. DoS attacks are also possible by creating large amount of RF noise in the neighborhood of the network. The DAIR security management system can detect such attacks by comparing current observations with historical data observed from multiple vant age points. DoS attacks can also be mounted by gaining access to the corporate wired network and attacking the APs from the wired side. The DAIR system does not handle DoS attacks on the wired network. Phishing Phishing is an active attack. An attacker sets up a wireless AP that masquerades as a legitimate corporate AP (same SSID, per- haps even same BSSIDs). If the client does not use mutual authentication, it is possible for the attacker to lure unsuspecting legiti- mate users to connect to its AP. The attacker can then use a variety of techniques to extract private information (for example, sniff for passwords). The DAIR system can detect phishing attacks. How- ever, we do not describe solutions to phishing attacks in this paper. ACTIVE ATTACKS SECURITY ATTACKS Certain active attacks can be easily performed alongside an ad -hoc network. Understanding possible shape of attacks is for all time the first step towards increasing good safety solutions. Based on this danger analysis and the recognized capabilities of the potential attackers, several well recognized attacks that can target the operation of a routing protocol in an ad hoc network are discussed. Impersonation. In this kind of attack, nodes may be clever to join the network untraceable or can able to send the false routing data/information, camouflaged as some other trusted node. Wormhole. The wormhole attack involves the collaboration stuck between two attackers. One attacker gets the routing traffic at one point of the network and changes their path to another point in the network that shares a confidential communication link between the attackers, then selectively injects tunnel traffic back into the network. The two colluding assailant can potentially deform the topology and set up routes under the control over the wormhole link. Rushing attacks: The ROUTE REQUESTs for this Discovery sanded forwarded by the attacker can be the 1st to approach each neighbor of the target, then any way exposed by this Route Discovery will comprise a hop through the attacker. That is, when a neighbor of the target gets the hurried REQUEST from the attacker, and it forwards that REQUEST, and will not send onward any further REQUESTs from this Route Discovery. When non-attacking REQUESTs arrive later at these nodes, they will discard those legitimate REQUESTs. Blackmail: The attack incurs outstanding to be short of of genuineness and it grants stipulation for any node to corrupt other nodes legal information. Hops more often keep the data/ information of apparent malevolent nodes in a blacklist. This attack is pertinent alongside routing protocols that use mechanisms for the recognition of malicious nodes and spread messages that try to blacklist the criminal. An attacker may make such coverage messages and tell other nodes in the network to put in that hop to their blacklists and cut off legitimate nodes from the network. Chapter 3 Secure Routing The previously presented ad hoc routing protocols with no security contemplation assume that all participating nodes do not maliciously troublemaking the operation of the protocol. However, the continuation of malicious entities cannot be unnoticed in any system, particularly in open ones like ad hoc networks. Safe routing protocols manage with malicious nodes that can disturb the right performance of a routing protocol by changing routing information. By fabricating the wrong routing data or information and by impersonating other nodes. These safe routing protocols for ad hoc networks are either totally new stand-alone protocols, or in some cases incorporations of security mechanisms into obtainable protocols. Generally the obtainable safe routing protocols that have been future can be generally secret into two types, those that use hash chains, and those that in order to function require predefined trust relations. This method, jointly nodes can eff iciently validate the legitimate traffic and distinguish the unauthenticated packets from outsider attackers. ROUTING PROTOCOL FOR AD-HOC NETWORK SECURITY SEAD: Safe Efficient Ad hoc Distance-vector routing protocol. A safe ad hoc network routing protocol that is established on the design of the Destination Sequenced Distance Vector routing protocol. To hold up employ of SEAD with hops of partial CPU processing abilities, and to guard against modification of the source address for a routing update and attacks in which an rejection of service attacks makes attempts to reason other nodes to use surplus network bandwidth or processing time of the network, efficient one way hash Chains but not cryptographic operations are used in the verification of the series number and the metric field of a routing table update message. When a node in SEAD sends a routing update, the node includes one hash value from the hash chain with each entry in that update. The nodes sets the purpose address in that entry to that target nodes address, the metric and series number to the values for that target in its routing table, and the hash value to the hash of the hash value conventional in the routing update entry from which it learned that route to that destination. When a node receives a routing inform, for each entry in that update, the node checks the verification on that entry, by the target address, sequence number, and metric in the conventional entry, together with the newest prior genuine hash value established by this node from that destinations hash chain. The hash value of each entry is hashed the right number of times and it is compared to the before authenticated value. Depending on this contrast the routing update is either established as authenticated, or discarded. Ariadne; Ariadne is a safe on-demand ad hoc routing protocol based on DSR that restricts attackers or the mutual hops from tampering with uncompromised routes containing of uncompromised hops, and also stops a lot of types of DOS attacks. In addition, Ariadne uses only extremely well-organized symmetric cryptographic primitives. To induce the objective of the authority of each field in a ROUTE REQUEST, the originator simply includes in the REQUEST a MAC computed with key over exclusive data. The object can with no trouble corroborate the authenticity and newness of the ROUTE REQUEST using the shared key. One-way hash functions are use to confirm that no hop was absent which is called per hop hashing. Three alternative methods to attain hop list verification. The TESLA protocol, digital signatures, and typical MACs. When Ariadne Route detection is used with TESLA, every node authenticates the original data in the REQUEST. The objective buffers and does not fire the REPLY awaiting midd le nodes can discharge the matching TESLA keys. Ariadne Route Discovery using MAC is the majority well-organized way of the three option verification mechanisms, but it asks couple wise communal keys among all nodes. The MAC list in the ROUTE REQUEST is computed by a key common among the object and the present node. The MACs are verified at the target and are not returned in the ROUTE REPLY. If Ariadne way detection is used with digital signatures, the MAC list in the ROUTE REQUEST becomes a signature list. SRP: The safe Routing Protocol consists of quite a lot of safety extensions that can be practical to existing ad hoc routing protocols as long as end-to-end verification. The one and only requirement of the future scheme is the sustained existence of a security association between the node initiating the query and the sought destination. The safety association is used to found a common secret between the two nodes, and the non mutable types of the exchanged routing messages are confined by this shared secret. The method is robust in the occurrence of a number of non-colluding nodes, and provides Routing Table Overflow: In a routing table spread out attack the malevolent node floods the network with bogus route formation packets to non existing nodes to overpower the routing protocol implementations in order to devour the resources of the participating nodes and interrupt the establishment of legal routes. The goal is to create enough routes to prevent new routes from being created or to engulf the protocol execution. Proactive routing protocols are more vulnerable to this attack, since they attempt to produce and preserve routes to all possible destinations. A spiteful node to apply this attack can simply send unnecessary route advertisements to the network. To apply this harasses in order to target a reactive protocol like AODV is to some extent more involved since two nodes are obligatory. The first node should make a genuine request for a route and the malicious node should reply with a forged address. Sleep Depravation: The sleep scarcity afflict aims at the utilization of store of a specific node by constantly keeping it busy in routing decisions. This attack floods the network with routing traffic in order to munch through battery life from the nodes and accessible bandwidth from the ad hoc network. The malicious node continually requirements for either existing or non-existing destinations forces the neighboring nodes to procedure and forward these packets and therefore munch through batteries and network bandwidth hindering the normal operation of the network. Location disclosure: Location disclosure is an attack that targets the solitude necessities of an ad hoc network. Through the use of traffic analysis techniques or with simpler probing and monitoring methods an attacker is able to discover the location of a node, and the structure of the network. If the locations of some of the intermediary nodes are known, one can gain information about the location of the destination node as well. Routing table poisoning: Routing protocols uphold tables which hold information on the subject of routes of the network. In poisoning attacks the malevolent nodes create and send untrue traffic, or modify legitimate messages from other nodes, in order to create false entries in the tables of the participating nodes. One more option is injecting a RREQ package with a high sequence number. This will reason that all other legal RREQ packets with lower sequence number will be deleted. Routing table poisoning attacks can result in selection of non-optimal routes, creation of routing loops, bottlenecks and even partitioning sure parts of the network. Black Hole: A malicious node uses the routing protocol to insert fake route answers to the route needs it receives promotion itself as having the straight path to a target whose packets it needs to cut off. Once the fake route has been recognized the mean node is able to become a member of the lively route and intercept the communication packets. Network traffic is diverted through the malicious node for eavesdropping, or be a focus for all traffic to it in order to execute a DOS by dropping the received packets or the first step to a man-in-the-middle attack. While the safety requirements for ad hoc networks are the similar the ones for fixed networks, namely ease of use, privacy, reliability, validation, and non-repudiation mobile wireless networks are usually more susceptible to information and physical safety fears than fixed wired networks. Securing wireless ad hoc networks is chiefly tricky for many reasons as well as vulnerability of channels and nodes, nonattendance of communications, dynamically altering topology and etc.; The wireless channel is available to both legal network users and malicious attackers. The abstract of centralized management makes the traditional security solutions based on certification establishment and on-line servers unsuitable. A malicious attacker can willingly become a router and disturb network operations by deliberately disobeying the protocol specifications. The nodes can move arbitrarily and liberally in any way and systematize themselves arbitrarily. They can stick together or leave the network at any time. The network topology changes regularly, rapidly and randomly which considerably alters the status of trust among nodes and adds the complexity to routing among the mobile nodes. The egoism that nodes in ad hoc networks may tend to reject providing services for the advantage of other nodes in order to keep their own possessions introduces new security issues that are not address in the infrastructure-based network Chapter No 3 Distributed Security Scheme for Mobile Ad Hoc Networks In difference to fixed networks a central certification power is not possible in ad hoc networks. Distributing the functionality of certification power over number of nodes is a probable solution. This can be got by creating n shares for a clandestine key and distributing them to n different node. Key can be generating by combining the shares using doorsill cryptography methods. Mobile ad-hoc networks are extremely active. Topology differences and link crack occur fairly often. Therefo re, we require a safety answer which is active, too. Any malicious or disobedient nodes can produce antagonistic attacks. These types of attacks can gravely injure essential aspects of safety, such as veracity, confidentiality and space to yourself of the node. Current ad-hoc routing protocols are totally unsure of yourself. Furthermore, obtainable safe routing mechanisms are either too luxurious or have impractical necessities. In ad hoc network, safety solution should separate the attackers and compromised nodes in the network. Proactively dividing the attackers make it sure that they cannot carry on to attack and waste the network resources in future. A safety solution should have lessening transparency over. Attacks beside ad-hoc routing protocols can be categorize as active or passive. A passive attack does not upset the functioning of the protocol, but tries to discover valuable information by listening to traffic. An active attack inserts arbitrary packets and tries to upset the operation of the protocol in order to bound the accessibility, gain confirmation, or attract packets meant to other nodes. In ad hoc network disobedient node can advertise its accessibility. Nearby nodes changs its route table with the new route and ahead the packet through the disobedient node. Misbehaving node can alter or even drop the packet. So mobile nodes must be able to prove the reliability of a new neighbor before adding it to the route table. Also it is imperative to care for the data packets from eavesdropping. Once the cluster member link has reputable a secured link, they can further switch symmetric key and encrypt data packet to ensure data in private and integrity. CLUSTER-BASED TOPOLOGY Clustering is a method by which nodes are placed into groups, called clusters. A cluster head is designated for each cluster. A cluster head establishes a list of the nodes belonging to the similar cluster. It also maintains a path to each of these nodes. The path is updat ed in a proactive manner. Similarly, A cluster head maintains a list of the gateways to the neighboring clusters. Using the information gathered from the members of the cluster, each cluster head distribute the shares to the cluster members. Each cluster head select a set of gateway nodes. In order to have a secure communication between inter cluster nodes, gateway nodes can act as the trusted member of the corresponding cluster. Through the trusted members secured communication link can be established between two clusters. The cluster head can operate as a trusted certificate authority and it can distribute the certificate share to all cluster members. When a member node fails, at least one of its neighbors reports this node failure to the cluster head. If a cluster head fails, this cluster has to be re-organized and it affects the normal functioning of the network. We propose a novel fully distributed cluster based safety mechanism without cluster head. We assume that self orga nized mobile networks are shaped by a group of nodes having a suitable individuality (for example communication between the military officials or disaster recovery team). In our design each node is granted temporary admission into the network using an identity verification process. Each node generates a code using the equation (1) and forwards the node ID and code to the neighboring nodes. To confirm the identity of the sender, neighboring nodes calculates the hash code using the equation (2). If the generated code and well-known code are same, it accepts the sender as a applicable member and add the sender node ID to set S. (S is the set of all valid neighbors and vibrant clustering algorithm uses set S to create non-overlapping clusters) time when the network is in high-quality condition without any attacks. By adopting the cluster based security scheme it cause less overhead as the network is in operation and proactively isolate the attacker.After initial verification all nodes a re continuously monitored by the neighboring nodes and credits are its credits as it stays and behaves well in the network. . The period of validity is propositional to its credits. Miss-behaving nodes credits are decremented; it will be denied network access when it reaches the minimum threshold level. Probabilistic Clustering Model It is possible to characterize this type of phenomena to which the poisson distribution is possible. T1, T2, T3 †¦ Tn are the non-overlapping intervals, then the number of nodes entering into the cluster boundary in the interval is independent. There exists a constant q such that the probability of one event (exactly one node enters into the cluster boundary or leaves the cluster boundary) occurs in the interval of length dt is approximated to q*dt. The probability of two or more events will occur during an interval is approximately zero. So the experiment can be called a poisson experiment. For such experiment, if X counts the number of e vents occurs during any given interval, then it can be shown that X posses a poisson distribution. If the three poisson condition do hold and is X counts the number of events occurs during some specific time interval duration t, the X is poisson distributed with = qt . E(x) is a parameter that carries information regarding the central tendency of the random phenomenon modeled by X. E(x) is often sufficient to give a partial description in terms of moments of the random variable. A moment generating function of a distribution can be employed to find the the dominating set. Cluster creation module forms the non-overlapping clusters based on the valid neighbor set data. Gateway nodes are identified by the cluster maintenance module and all members maintain the list of gateway nodes. Shortest path to moments of the random phenomenon. Function M X (t ) of the gateway nodes can be calculated from the local route table. In addition to the other routing information, it variable t is definition as the moment of the random phenomenon X with respect to time t. The cluster topology changes can be represented using the random experiment X. The probability of nodes entering into the cluster boundary and nodes leaving a particular boundary can be calculated from the moment generating function and its mean and variance. Figure given below illustrates the protocol stack architecture of our security system. Figure illustrates the composition of our security solution, whichconsistsof fiveinteracted components. Cluster Gateway Node Selection Process MANETs can be shape as an undirected graph with weights for nodes, G, G= [V, E] V, is the position of the mobile nodes and the E the combination of the bidirectional wireless link. G and V are together dynamic set. Maintain the public key of all cluster members. In dynamic network environment asymmetric keys can be used to encrypt/decrypt the data. Cluster Maintenance Cluster preservation module proactive ly maintains the route information of all cluster members. There are four topology changes that requires cluster updating. Node Switches ON: This will be handled in exactly the same way as cluster formation. This case includes the case when a new node enters into the cluster boundary which is not currently a member of any cluster. A new link (with a node already bound to a cluster) is detected: This means that an existing node (say, Node A) has moved into the hearing range of another node (Node B). Both nodes A and B will find out the cluster affiliations of each other, update their own routing tables and broadcast this information to their respective cluster members. Note that both these nodes may now become gateway nodes (if both of them are in different clusters).

The Use Of Genetic Engineering On Agriculture And Food...

Introduction : The use of genetic engineering techniques in agriculture and food production is seen as an exciting and valuable development by many people who welcome the improvements in production efficiency that they offer to farmers and the enhanced nutritional value that is envisioned to benefit consumers. Others, however, are objecting strongly, raising environmental, food safety, and ethical concerns. A majority of people in Western Europe, Japan and Australia, for example, want at least to have labels on products that contain genetically modified organisms (GMOs), while the most extreme opponents want to see genetically modified (GM) crops completely excluded from production and consumption in their country. Background for GMO debate : ï‚ § Need to feed growing world population and lack of progress in eradicating hunger. ï‚ § Food crisis in recent years ï‚ § Food production increasingly affected by climate change GMOs to have beneficial impact on development would need to benefit in particular smallholder farmers in developing countries. GMOs in developing countries : ï‚ § 2011 : 160 mio hectares cultivated with GM crops in 29 countries; half of that area in developing countries ï‚ § Four varieties (soy, maize, cotton, canola) dominate global market ï‚ § Two main traits : GM crops with insecticide effect (BT, only maize and cotton) and with herbicide tolerance (HT, all four crops) Potential economic impact of GMOs - a debate ï‚ § Increased yield ï‚ § Improved resistance to pestsShow MoreRelatedGenetic Engineering Of Food Is Good For The Welfare Of Humanity1135 Words   |  5 PagesGenetic engineering of food is one of the most controversial issues facing the universe today. 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Designing A Traditional Stage Gate Development Process

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The Early Confucius And Modern Political Party - 891 Words

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