Paper Critique: “Airavat: Security and Privacy for Mapreduce” Essay

1. (10%) State the problem the paper is trying to solve. This paper is trying to demonstrate how Airavat, a MapReduce-based system for distributed computations provides end-to-end confidentiality, integrity, and privacy guarantees using a combination of mandatory access control and differential privacy which provides security and privacy guarantees against data leakage. 2. (20%) State the main contribution of the paper:   solving a new problem, proposing a new algorithm, or presenting a new evaluation (analysis). If a new problem, why was the problem important? Is the problem still important today? Will the problem be important tomorrow? If a new algorithm or new evaluation (analysis), what are the improvements over previous algorithms or evaluations? How do they come up with the new algorithm or evaluation? The main contribution of the paper is that Airavat builds on mandatory access control (MAC) and differential privacy to ensure untrusted MapReduce computations on sensitive data do not leak private information and provide confidentiality, integrity, and privacy guarantees. The goal is to prevent malicious computation providers from violating privacy policies a data provider imposes on the data to prevent leaking information about individual items in the data. The system is implemented as a modification to MapReduce and the Java virtual machine, and runs on top of SELinux 3. (15%) Summarize the (at most) 3 key main ideas (each in 1 sentence.) (1) First work to add MAC and differential privacy to mapreduce. (2) Proposes a new framework for privacy preserving mapreduce computations. (3) Confines untrusted code. 4. (30%) Critique the main contribution a. Rate the significance of the paper on a scale of 5 (breakthrough), 4 (significant contribution), 3 (modest contribution), 2 (incremental contribution), 1 (no contribution or negative contribution). Explain your rating in a sentence or two. This system provides security and privacy guarantees for distributed computations on sensitive data at the ends. However, the data still can be leaked in the cloud. Because multiple machines are involved in the computation and malicious worker can sent the intermediate data to the outside system, which threatens the privacy of the input data. Even not to this extent, temporary data is stored in the workers and those data can be fetched even after computation is done. b. Rate how convincing the methodology is: how do the authors justify the solution approach or evaluation? Do the authors use arguments, analyses, experiments, simulations, or a combination of them? Do the claims and conclusions follow from the arguments, analyses or experiments? Are the assumptions realistic (at the time of the research)? Are the assumptions still valid today? Are the experiments well designed? Are there different experiments that would be more convincing? Are there other alternatives the authors should have considered? (And, of course, is the paper free of methodological errors.) As the author’s stated on page 3 â€Å"We aim to prevent malicious computation providers from violating the privacy policy of the data provider(s) by leaking information about individual data items.† They use differential privacy mechanism to ensure this. One interesting solution to data leakage is that they have the mapper specify a range of its keys. It seems like that the larger your data set is, the more privacy you have because a user affects less of the output, if removed. They showed results that were really close to 100% with the added noise, it seems this is viable solution to protect the privacy of your data input c. What is the most important limitation of the approach? As the authors mention, one computation provider could exhaust this budget on a dataset for all other computation providers and use more than its fair share. While there is some estimation of effective parameters, there are a large number of parameters that must be set for Airavat to work properly. This increases the probability of misconfigurations or configurations that might severely limit the computations that can be performed on the data. 5. (15%) What lessons should researchers and builders take away from this work. What (if any) questions does this work leave open? The current implementation of Airavat supports both trusted and untrusted Mappers, but Reducers must be trusted and they also modified the JVM to make mappers independent (using invocation numbers to identify current and previous mappers). They also modified the reducer to provide differential privacy. From the data provider’s perspective they must provide several privacy parameters like- privacy group and privacy budget. 6. (10%) Propose your improvement on the same problem. I have no suggested improvements.

My School Essay

School is a temple of learning and a training ground for future citizens. The name of my school is Penang Chinese Girls High School. It was set up in 19-an by a land-lord in our area. He donated land and money for the school. The atmosphere in which our school is situated is very pleasant. It is surrounded by a big field on one side and a small garden with flowers on the other. The school has three rows of big buildings. The name of the school is written on the front building. There are many classrooms in the front building. Other rooms in the back building are used for different purposes such as the Head Master’s Office, Library, the Clerk’s Office, the Science Laboratory, the Teachers’ Common-room, the N. C. C. and etc. There are 80 teacher, a specific teacher for librarians, a clerk and several peons in our school. All the teachers are qualified and experienced. The Head Master is a learned woman,she solved problems of the pupils efficiently. The total number of students of our school is about 20thousand hundred. We go to school in uniform,our school consisits of girls only,therefore girls wear blue skirt and white blouse. The school functions from for 2 sessions. During the recess hour we go to the canteen to relax and savour some mouth-watering food. Some students also go to library and read newspaper there. In games period we play badminton, volley ball, etc. Girl students play ring ball too. The library of our school is a medium one. There are about two thousand books on different subjects; we did not have a library period in our weekly routine,so we borrow books from our library and refund them after a week in our free time. We observe the Republic Day, the Independence Day, the Teacher’s Day in our school. We also hold debate competitions and games and sports every year. The school magazine is published every year. In annual examinations the students from our school show brilliant performance. Many students from this school have occupied glorious position in our state. Our school always holds book fair for students to have a chance to explore the advantages of reading. This year a classical teacher from our school retired formally. The discipline, the study atmosphere and the brilliant academic result of our school attract many meritorious students from distant parts of our state. It is an ideal school in all respects.

Suicide In College Essays

Suicide In College Essays Suicide In College Essay Suicide In College Essay College is a fun exciting time in a person’s life.   It is a new adventure filled with opportunities.   Unfortunately, when people get there they sometimes discover it was not all they had anticipated it to be.   Although college can be a great learning experience, it is also something very different than what most people are used to.   It is the first time living away from parents and can lead to frustration, loneliness, depression, overindulgence, and some mental illnesses become apparent in college years.   In most cases the students either get over the problem, or drop out of school, in some cases; however these problems lead to suicide.   â€Å"Suicide is the third leading cause of death in 15 – 24 year† (AFSP).   â€Å"It is the second leading cause of death in college students† (Naval Academy).   Ã¢â‚¬Å"The person who feels extreme emotional pain is the type of person who may consider suicide† (Kolehmainen, 14).Frustration and loneliness are two of the most common problems experienced when a person is attempting to adjust to college.   For most students this is the first move away from home.   They discover they have to do their own laundry, get themselves up on time, and clean up after themselves.   This can lead to confusion and frustration.   The loneliness sets in when they realize they are miles away from friends and family.   Both of these problems are minor psychological issues and are usually relieved within the first few weeks as the person makes new friends and adjusts to college life.   If they are unable to adjust, the problems can become much worse and usually lead to depression.Depression has two causes one of which is a problem in the brain; the other is caused by bad situations in a person’s life.   Either cause can lead to suicide.   Clinical depression (chemical problems inside the brain) can be treated effectively with medication, once it has been diagnosed.   T he situational depression is one of the leading factors in suicide. This is the kind that loneliness can lead to it happens when something happens in a persons life to make them very sad for an extended period of time.   It can be caused by a beak-up, loss of a loved one, or loneliness or many other reasons. It is quite common in college students, when they realize they aren’t as popular as they were in high school, they can not keep their grades up, or they miss the people they left behind. Some signs of depression include crying, nightmares, withdrawal from friends and family, feelings of hopelessness, not eating, weight changes, anger, lack of concentration, or decreased energy (Horn, 109).   When someone shows any of these symptoms they need to get help.As college is often when people move away from their parents, this freedom often leads to parties, drinking, and sometimes trying illicit drugs.   Some of these things if taken in excess can alter thoughts.   Somet imes they alter the thoughts to make them consider suicide.   These thoughts would often not be acted on if the person was not under the influence of the drugs.   Alcohol is a depressant and thus would increase any depressed thoughts and could be an influence on a student already thinking about suicide. â€Å"Drugs and alcohol reduce inhibitions and increase risk taking behavior, thus reinforcing whatever tendencies towards self destruction people poses† (Rivera).Some college students have mental disorders which cause thoughts of suicide and eventually lead them to act on it.   Schizophrenia is one mental illness that first appears in late teenage years and college. This illness causes people to hear voices at times and have delusions that someone is trying to cause them harm. These thoughts can sometimes manifest as thoughts of suicide.   There are a number of other illnesses such as bi-polar disorder that if properly treated can be managed, but these illnesses are s ometimes not discovered, until the person has acted on the thoughts of suicide.Suicide is considered a permanent solution to a temporary problem. â€Å"Nearly 1,100 suicides are projected to occur on college campuses this year† (Naval Academy).   This indicates there is a problem on college campuses.   Many people, who are inclined to commit suicide, give indications before they actually act on these problems.   Friends and family need to be aware of the signs, which are similar to those of depression.   When people turn eighteen they are not automatically ready to go out into the world alone.   Many are ready, but obviously many are not.   Students getting ready to go to college need to be educated on the options and support available to them.   High school guidance counselors need to prepare young people for what they need to expect in college.   They need to understand it is a big change from high school and the changes are not always good.   Parents need to prepare students for the laundry and cleaning up after themselves as well as for the adjustment to being responsible for oneself.   The more prepared students are, when they enter college, the better they will be able to handle the challenges college presents.   There is no way to prevent suicide altogether, but preparation and watching for signs will hopefully save a number of them.American Foundation for Suicide Prevention, (2007), Retrieved June 4, 2007 from,AFSP: Facts and Figures: National StatisticsHorn, Wade F. and Keough, C. New Teen Book, (1999) Des Moines, Iowa:Better Homes and Gardens BooksKolehmainen, Janet, and Handerk, S. Teen Suicide,(1986) Minneapolis:Lerner PublicationsRivera, Roberto, â€Å"Moods and Worldviews: Suicide on Campus†, Boundless Webzine,Retrieved June 11, 2007 from boundless.org/2000/features/a0000271.htmlUnited States Naval Academy, College and Suicide- Just the facts, RetrievedJune 11, 2007 from, MDC Suicide College Facts

Spider Monkey Facts (Ateles)

Spider Monkey Facts (Ateles) Spider monkeys are New World monkeys belonging to the genus Ateles. They have long limbs and prehensile tails, giving them the appearance of large arboreal spiders. The name Ateles comes from the Greek word atà ©leia, which means incomplete and refers to the spider monkeys lack of thumbs. Fast Facts: Spider Monkey Scientific Name: Ateles sp.Common Name: Spider monkeyBasic Animal Group: MammalSize: 14-26 inch body; up to 35 inch tailWeight:13-24 poundsLifespan: 20-27 yearsDiet: OmnivoreHabitat: Central and South American rain forestsPopulation: DecreasingConservation Status: Vulnerable to Critically Endangered Species There are seven species and seven subspecies of spider monkey. The species are the red-faced spider monkey, white-fronted spider monkey, Peruvian spider monkey, brown (variegated) spider monkey, white-cheeked spider monkey, brown-headed spider monkey, and Geoffroys spider monkey. Spider monkeys are closely related to woolly monkeys and howler monkeys. Description Spider monkeys have extremely long limbs and prehensile tails. The tails have hairless tips and grooves resembling fingerprints. The monkeys have small heads with hairless faces and wide-set nostrils. Their hands are narrow with long, curved fingers and reduced or non-existent thumbs. Depending on the species, hair color may be white, gold, brown, or black. The hands and feet are usually black. Males tend to be slightly larger than females. Spider monkeys range from 14 to 26 inches in body length with a tail up to 35 inches in length. On average, they weigh anywhere from 13 to 24 pounds. Habitat and Distribution Spider monkeys spend their lives in trees of tropical rain forests in Central and South America. Their habitat ranges from southern Mexico to Brazil. Spider monkeys live in Central and South America. Jackhynes / Wikimedia Commons Diet Most of the spider monkeys diet consists of fruit. However, when fruit is scarce, they eat flowers, leaves, and insects. The lead female within a group organizes foraging. If food is abundant, the group feeds together, but it will split if resources are scarce. Most feeding occurs in the early morning hours, but spider monkeys feed throughout the day and sleep in trees at night. Behavior The average spider monkey group ranges from 15 to 25 individuals. The closest bonds are between females and their offspring. Males also group together. Unlike most primate species, it is the females rather than the males that disperse at puberty and join new groups. Spider monkeys are highly intelligent. They communicate using vocalizations, scent marking with urine and feces, and body postures. Reproduction and Offspring The female spider monkey selects her mate from within her social group. Gestation lasts between 226 to 232 days, usually resulting in a single offspring, but sometimes twins. The female has sole care of her young, which she carries with her as she forages. Her offspring tightly wraps its tail around its mothers midsection or tail. Spider monkeys reach sexual maturity between 4 and 5 years of age. Females only bear offspring once every three or four years. Young males sometimes commit infanticide within their group to increase their chance of mating. In the wild, spider monkeys may live 20 to 27 years.They may live over 40 years in captivity. Geoffroys spider monkey with young. Mark Newman / Getty Images Conservation Status All spider monkey populations are decreasing. The IUCN classifies the conservation status of the Guiana spider monkey (Ateles paniscus) as vulnerable. Four species are endangered. The variegated spider monkey (Ateles hybridus) and brown-headed spider monkey (Ateles fusciceps) are critically endangered. Spider Monkeys and Humans Humans are the main threat to spider monkey survival. The monkeys are widely hunted as food and suffer from habitat loss due to deforestation. Some populations live in protected areas. Spider monkeys are susceptible to malaria and are used as research animals in studies of the disease. Sources Cuarà ³n, A.D., Morales, A., Shedden, A., Rodriguez-Luna, E., de Grammont, P.C.; Cortà ©s-Ortiz, L. Ateles geoffroyi. The IUCN Red List of Threatened Species 2008: e.T2279A9387270. doi:10.2305/IUCN.UK.2008.RLTS.T2279A9387270.enGroves, C.P. in Wilson, D.E.; Reeder, D.M. (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press, 2005. ISBN 0-801-88221-4.Kinzey, W. G. New world primates: ecology, evolution, and behavior. Aldine Transaction, 1997. ISBN 978-0-202-01186-8.Mittermeier, R.A. Locomotion and Posture in Ateles geoffroyi and Ateles paniscus. Folia Primatologica. 30 (3): 161–193, 1978. doi:10.1159/000155862Mittermeier, R.A., Rylands, A.B.; Boubli, J. Ateles paniscus. The IUCN Red List of Threatened Species 2019: e.T2283A17929494.

Industrial Revolution in the Late Nineteenth Century Assignment

Industrial Revolution in the Late Nineteenth Century - Assignment Example This plan, therefore, played a significant historical role because it contained communism in Western Europe (Divine G-10). Gulf of Tonkin Resolution The Gulf of Tonkin Resolution took place in 1964, after an American destroyer in the Gulf of Tonkin was attacked by a North Vietnamese. As a result, President Johnson convinced the Congress to pass a resolution empowering him to attack Vietnam through the armed forces. This resolution was not only used by America as retaliation but also heightened its involvement in the Vietnam War. THE ESSAY Industrial Revolution in the Late Nineteenth Century In the late nineteenth century, the American economy marked a complete turnaround following the tremendous industrial revolution that took place around that time. Some of the major factors that contributed to these developments include new innovations in the business strategy and technology. These developments led to new ways of farming and manufacturing and, most importantly, increased the effici ency of these economic activities. Railroad was one of the important breakthroughs during this era of industrial revolution, which enhanced movement of people as well as goods, and stimulated a range of economic activities as well as business strategies in America. This essay will discuss the developments of the industrialization during the late nineteenth century, pointing out their benefits and drawbacks. Following the great industrial improvements after 1815, the market demand for different commodities led to innovation of speedy mass production and standardized methods of production. The first innovation in textile manufacturing was a fully developed factory system. This included invention of spinning machinery and the first cotton mills... In the late nineteenth century, the American economy marked a complete turnaround following the tremendous industrial revolution that took place around that time. Some of the major factors that contributed to these developments include new innovations in the business strategy and technology. These developments led to new ways of farming and manufacturing and, most importantly, increased the efficiency of these economic activities. Railroad was one of the important breakthroughs during this era of industrial revolution, which enhanced movement of people as well as goods, and stimulated a range of economic activities as well as business strategies in America. Following the great industrial improvements after 1815, the market demand for different commodities led to innovation of speedy mass production and standardized methods of production. The first innovation in textile manufacturing was a fully developed factory system. This included invention of spinning machinery and the first cott on mills that used power loom. This technology enabled use of a single factory to convert fiber into cloth. The technology greatly enhanced efficiency in the cloth industry.

Healthy Eating Essay Example | Topics and Well Written Essays - 1500 words

Healthy Eating - Essay Example As the problem starts at young age it is best to overcome it at that time. The main motivators for obesity in children include junk foods, video games and television; as children's are mostly targets in the media for these advertisements. Parent's role also plays an important part; they are the ones to encourage their children for sports and exercises, and replace the junks with fruits and vegetables. Eating healthy food full of nutrition and vitamins is important in order to stay healthy, but if the problem increases it is best to consult a doctor, dietitian or a nutritionist. Due to the sudden increase in which America's children are becoming obese, it has been stated that "the current generation of American youth might live less healthy and possibly even have shorter lives than their parents (Bernstein)" if nothing is done about the deteriorating health of children. Obesity is one of the leading causes of health problems, which stays present as a person gets older. Obesity used to be an issue in adults, but today, obesity is something that often starts when a person is in their childhood, and their health worsens the older they get. "America must be getting thinner, right Mc Donald's has stopped super-sizing. Coke has launched its 'half the sugar, half the carbs' C2 cola and it seems like every week a new diet book hits the shelves and the best seller list (Dan Crane, 2009). In April 2005 the sesame street recognized the growing crises of childhood obesity in United States and introduced 'healthy habits for life' a segment in their episodes that featured tips on healthy eating and exercise. Health problems that are associated with obesity include diabetes, heart failure, and various kinds of cancer; unfortunately, many of these can lead to an early death. As aforementioned, the media has played a large role in encouraging obesity; due to the in crease in how many children are obese, the media has since turned around, discouraging the gorging of junk food products, urging children to eat better and to spend more time participating in physical activity. Being aware of obesity problems, a partnership was formed in 2005 by the American Heart association by the name of Alliance for a Healthier Generation with the help of U.S president Bill Clinton and the Nickelodeons. The purpose of this alliance was to protect the life threatening consequences of unhealthy lifestyle habits. They reached kids through vigorous public awareness campaigns. Speaking of his media company's role in the partnership, Nickelodeon Network resident Herb Scannell said, "We want kids to become personally invested in living strong, healthy lives. And if we do our jobs right, kids will believe that being healthy is cool". (2005) furthermore television networks designed mainly for children, such as Nickelodeon and the Disney Channel, have taken it upon themse lves to encourage children to live healthier; there are even a few times a year that the networks shut themselves down for a few hours so that children do not feel as obliged to sit around and watch television, but are encouraged to go outside and

Internal and External Analysis for New Balance Athletic Shoes Inc Essay

Internal and External Analysis for New Balance Athletic Shoes Inc - Essay Example Finally, the company lacks the emphasis required on design in order to achieve broader sales volumes. The information uncovered for this report will be discussed in relative detail in this report. New Balance currently maintains a somewhat conservative mentality when it comes to trying to reach potential customers. This is an attitude within the company that needs to change and should represent flexibility in thinking toward a change in the brand. Such changes would require small internal adjustments in promotion (and the overall sales budget) to make the product stand out in the minds’ of consumers. Currently, the company only maintains 58 percent brand recognition (Bowen, Huckman & Knoop, 2008), considerably lower than that of their rival competition, Nike and Reebok. However, dollar for dollar, the company’s advertising expenditures are nearly equal with Reebok but the return on this investment is significantly higher for Reebok. The more mature-minded consumer may not be the ideal candidate for the modern New Balance company when it comes to increasing sales volumes, the key to moving forward may lay in reaching a much broader and younger, progressive consum er audience. The company is currently working with a wide variety of different styles for production which should be an integral part of the company’s operations: A well-developed research and development team combined with marketing excellence that can reposition the product (based on budget restrictions) as a more progressive shoe company. It is suggested that marketing strategies should include focusing on this element of good business, illustrating to prospective customers that the company intends to stay around and means business. Such marketing changes, developed through an appropriate project management team, could unleash a brand new image for New Balance, suggesting that it, too, can weigh quality with