Decentralized Approach for Achieving Seamlessness

Decentralized Approach for Achieving Seamlessness CONCLUSION AND FUTURE WORK Thesis Outcome The major outcome of this research effort is to analyse the feasibility and benefits of achieving seamlessness with the proposed decentralized approach augmenting the conventional centralized approach for heterogeneous networks. In lieu of this, the outcomes achieved include A Hybrid Approach (Linux Kernel Module and SCTP) to decrease the latency during Vertical Handoff process and IP mobility to achieve seamless continuity. Location Awareness in Hybrid Approach to reduce the triggering of unnecessary handoffs during vertical handoff that result in performance degradation. Contributions of the Present Work In this thesis, several aspects and approaches for seamless continuity are discussed. The major contributions of the work carried out in this thesis are: Different approaches to achieve seamless continuity in heterogeneous networking environment. A brief review on the open issues and challenges related to seamless continuity. Design and development of daemon based decentralized approach for intranet environment. Design and development of an efficient and fast method known as kernel based decentralized approach for improving the latency during handoffs. Development of Stream Control Transmission Protocol (SCTP) approach for addressing dynamic address reconfiguration in heterogeneous environment. Design and development of a novel hybrid method using the combination of SCTP and kernel module. Development of a location aware method to incorporate into the hybrid approach for heterogeneous networks. Solution Overview The proposed solution is a hybrid approach to achieve seamless session continuity in heterogeneous networks. This approach is completely decentralized complementing the centralized approach which is completely based on server agents. It can be applied to both intra and Internet environment without any changes to the network layer. To prove this approach for seamlessness, testing was done on three network interfaces Ethernet (eth), WLAN (wlan), WCDMA (wcdma). For Intranet A vertical handoff daemon was developed to achieve seamlessness over heterogeneous networks. This daemon application runs as a background process at the user space and it also takes care of the handoff process between various radio interfaces. Firstly, this proposed daemon continuously polls for the registered interfaces and then checks the status (live or dead) of these devices. Later, it also updates the status to the network layer of the protocol stack to keep the service continuing between the mobile device and the server. The designed architecture is well suited for all the IP based multimedia applications but running only in intranet environment. IP mobility is an issue which has to be still addressed which cannot be solved in this approach. For Internet To achieve seamless continuity over heterogeneous networks, this proposed solution is a combination of Stream Control Transmission Protocol (SCTP) and Linux kernel module. This kernel module gets registered with the Linux kernel and updates the status of various interfaces by signalling the SCTP application running at the user level. This SCTP application will then accomplish the handoff process between various network interfaces. The reason behind this approach is SCTP has an advantage of IP address reconfiguration which solves the IP mobility issue and Kernel module has an advantage of latency. This accomplishes the handoff process in a faster and elegant fashion. But this will not solve the problem of unnecessary triggering of handoffs. In this regard the following handoff decision process was integrated into hybrid approach to improve performance while achieving seamlessness. Location based Handoff Decision This proposed algorithm is completely based on location based information. This is a research effort to study the feasibility of location based solution which consists of combining the conventional handoff decision with a location based evaluation mechanism. This mechanism relies on positioning method for obtaining mobile user position fixes. Once the user’s location, speed and direction are calculated, the evaluation mechanism will predict the user’s path. It will then decide whether the user will remain in the same network coverage area for necessary duration to result in performance improvement. If not, this proposed evaluation method will notify the mobile device to trigger a handoff. The knowledge on user’s location, speed and direction is necessary to prevent inefficient and unnecessary handoffs. Conclusion In this research effort, a seamless vertical handoff system across heterogeneous networks is presented. It is implemented in current Linux operating system. In the proposed system, the handoff latency is much shorter than other current systems focusing on the issue of vertical handoff. Different from other vertical handoff systems, handoff agents or servers are not required in this system. Only with the mobile host itself, the vertical handoff can be realized. Moreover, the overhead during handoff is also quite low. The system is evaluated through a series of experiments. The experimental results demonstrated the handoff is handled in a fast and elegant manner. The proposed system is tested in the real-world analyses. The experiments were conducted under different environments and evaluated with various multimedia applications. This work is not only for home network solution but it is extended to an Internet solution. Moreover, prior to triggering handoff, the algorithm’s ability to predict user direction, speed and visit to WLAN coverage area allowed it to provide an observable benefit both on user’s perspective and also on network’s perspective. This location based evaluation of the algorithm helped to not only prevent the occurrence of unnecessary handoffs which would result in performance degradation but also reduce wastage of resources. The novel hybrid decentralized approach based on location awareness presented in this work handled the issues of latency, dynamic address reconfiguration and unnecessary triggering of handoffs for seamless continuity in heterogeneous networks. Future Work Keeping in view the wide proliferation of heterogeneous networks and high level of interworking required for next generation mobile users, the scope of the future work can be more focussed on pursuing open challenges such as battery power consumption, Quality of Service (QoS) and security for effective ubiquitous experience and seamless continuity. Battery power consumption of the mobile client is a significant criterion for handoff. Whenever the battery power drops to particular threshold, the mobile client should immediately shift to lower power demand network interface. As the demand for multimedia applications increases there is a need to guarantee QoS such as high available bandwidth, Bit Error Rate (BER), network load balancing, Signal to Noise ratio (SNR) and so on. Security is another important criterion which needs to be addressed. Hence, when handoff data is exchanged between devices it is always preferable to have network with high level of encryption. In this research effort, some work was done on best Access Point selection algorithm. With the enormous increase of WLAN AP’s everywhere, there is a need to look at new approaches to select the best AP among multiple AP’s for achieving horizontal handoffs.

Environmentalism in Manga and Anime :: Environmentalism Environment Essays

Environmentalism in Manga and Anime In Western news stories, Japan and the environment usually only come up together in one form: Japan is ruining the environment. Japan is hunting endangered whales; Japan is overfishing depleted fishing stocks; Japan has walled up the last of its wild rivers; Japan is building up all its wild areas. All these accusations are, unfortunately, true to some large degree. Even in anime, all too often what we see are images that point to a continuation of the current trend: metal and concrete mega-cities, like those in the anime Dominion, Akira, Gunnm, or in Bubblegum Crisis, or any of the other hard science-fiction worlds. Not a pleasant picture --- and in fact, in those "cyberpunk"-ish stories, the world is not a pleasant place to be in, in general. But, running through other works is a thread of a different hue. Listen closely, and a different voice is heard --- the voice of dissent, the voice protesting the loss of green spaces and clean waters and open air. Where has this voice come from? I'm not quite qualified to say for sure, but I can guess. Some of it is obvious: people who are tired of seeing tranquil forests razed, or seeing their favorite beach turned into a concrete nightmare (such as in Ibaraki Prefecture, Japan); people who read the news and hear of oil spills and extinctions and pollution problems. But another aspect is surely the traditional sense of Taoism that runs deep in Japanese culture. Taoism was the primary influence for ancient Asian paintings depicting humans and their habitations as mere tiny decorations on sweeping mountain vistas. Shintoism, along with traditional Chinese beliefs, helped add the concept of spirits and deities residing in trees and rocks and even household items. The sum of these philosophis suggests that humans should work within nature --- and this belief can be seen reflected in even some of today's modern manga. Whatever the reason, though, the environmentalist call comes up loud and clear in many places. Perhaps the best example is in the works of the father of manga himself, Tezuka Osamu. Some are familiar with his Jungle Taitei series ("Kimba the White Lion"). But Tezuka's fondness for animals and wildlife extends beyond the children's story. If we look at Black Jack (of Black Jack), we see a maverick, unlicensed, brilliant surgeon who charges ridiculous fees for his work. What does the normally cold-hearted Black Jack use the vast sums of money for?

Hybrid technology: shaping society’s future Essay

An Introduction to Hybrid Cars According to TechFaq, A hybrid car depends on two kinds of engines for propulsion power. Most hybrid cars available today use a combination of gasoline and electric engines while some use a combination of diesel and electric engines. Traditional gasoline-powered cars derive their propulsion power from combustion of gasoline. The combustion of gas produces the energy needed to turn the transmission as well as the wheels. Unfortunately, although fossil fuels still delivers the most power per pound, their by-products are harmful to the environment. Fossil fuels are also non renewable resources so as they became more scarce, their prices continued to rise. Electric-powered cars, on the other hand, have a set of powerful batteries for powering the electric motor which in turn rotates the transmission and turns the wheels. Although their by-products are almost pollution free, electric powered cars take a lot of time to recharge and are generally slow. A hybrid car combines the strengths of each type of engine. It produces less pollution and it is more economical than the conventional car while still being more powerful than electric powered cars. Its Components The components of a hybrid car are a fuel tank for the gasoline engine, a cutting-edge gasoline engine that is much smaller, more efficient and produces less pollution than usual gasoline engines, an electric motor/generator which can either draw energy from the batteries to power the car or charge the batteries while the car is slowing down, a set of batteries which acts much like the fuel tank for the electric motor, and the transmission which turns the wheels. It also has Regenerative Braking, Temporary Engine Shut-off, and other features like minimal-drag tires, carbon fiber, and other lightweight materials to reduce overall weight and state of the art aerodynamic designs for the body. All these things make it easier for a hybrid car to drive up inclines and accelerate, attain higher speeds as well as minimize fuel consumption and emissions (TeqFaq). Hybrid Cars and their Effects on Society Sky-high oil prices and an increased awareness of the energy and global-warming crises are helping fuel the hybrid’s gradually increasing visibility, wrote Donaldson-Evans of Fox News. â€Å"It’s part of the popular culture now. You are going to see more offerings,† said Aaron Robinson, technical editor at Car and Driver Magazine. â€Å"Car companies that do not offer hybrids will be seen as behind. † Its Effects on the People’s Buying Habits: According to the Donaldson-Evans report, with gasoline now being sold at higher than $3-a-gallon in much of the U. S. , hybrids are certainly getting more attention than ever before in their short lifespan. (Those sold in the United States are all less than 10 years old. )Almost every major car company that does business in America is offering hybrids or has them in the works. â€Å"Fuel is only going to get more expensive,† Robinson said. â€Å"People are changing their buying habits as a result. † Toyota has also pledged to make a total of one million hybrid cars by the end of the decade. â€Å"The hybrids have been profitable since very early on,† said Toyota Motor Sales U. S. A. spokesman Wade Hoyt. â€Å"We’re not losing money on it. It’s not a charity operation. We see the market as expanding. † Its Effects on the Car Industry The Japanese car manufacturer isn’t the only game in town when it comes to autos powered by gas and electric batteries, however. Ford Motor Company (F) offers the For Escape and the Mercury Mariner SUVs in the fuel-efficient forms, with plans for Ford Fusions and Mercury Milans to go hybrid by 2008. Ford Motor Co. spokesman Monte Doran said sales of the Escape and Mariner hybrids were up 55 percent in the first five months of 2006. â€Å"Ford is researching many different ways to deliver greener miles to consumers,† Doran said. â€Å"Hybrids are a very important part of that: They deliver amazing improvements in fuel economy without sacrificing performance and utility. † Other car makers with hybrids in the works: Hyundai, Nissan and GM’s Saturn and Chevrolet divisions, according to Robinson. Its Effects on Public Transportation The Fox News report went on by relaying how one Yellow Cab taxi driver in San Francisco has been carting passengers around in a Ford Escape hybrid since 2004 and can’t remember what his life was like in the strictly gas-powered world. â€Å"I love it. I wouldn’t go back to a regular cab,† said Paul Gillespie, the driver representative for the city’s seven-member taxi commission. â€Å"It saved me between $4,000 and $5,000 in gas last year. † Gillespie said San Francisco has between 40 and 50 hybrid taxis on the road, and he hopes to see that number climb steadily. â€Å"You’re just so much less noisy and intrusive and stinky,† he said. â€Å"It’s a win-win situation — you’re putting thousands of dollars in drivers’ pockets in addition to reducing CO2 emissions. † In the hybrid’s early days — around 1999 or 2000 — consumers and automakers were hesitant to latch onto the trend in part because of the fear that the battery would die every so often and be expensive to replace. Robinson believes hybrids will one day become so common and so widely used that they’ll just be another feature drivers can choose, rather than a totally different animal, the way they still seem now. It is expected that more and more public transportation vehicles will be using hybrid technology since it is to those vehicles that stop and go more often that hybrids work best as.

Analysis Of The Afternoon Of A Faun - 1728 Words

Vaslav Nijinskys The Afternoon of a Faun The Afternoon of a Faun is a modern ballet choreographed by Vaslav Nijinsky to a short symphonic work by Claude Debussy called Prà ©lude à   laprà ¨s-midi dun faune. It was Nijinskys first choreographed work and was first performed by Diaghilevs Ballets Russes in Paris at the Thà ©Ãƒ ¢tre du Chà ¢telet on May 29, 1912. The costumes and sets were designed by Là ©on Bakst. Both the music and the ballet were inspired by the poem Laprà ¨s-midi dun faune by Stà ©phane Mallarmà ©. The Afternoon of a Faun is a poem that describes a dreamy eroticism combined with a sense of whimsy, which is translated into the ballet. The poem represents the running thoughts of a faun who wakes up from a nap on a warm summer afternoon†¦show more content†¦The faun, who is neither human nor non-human, neither masculine nor feminine, forces atypical ideas of gender onto audiences. This was something audiences had never seen before, and to not only display this type of character, but to show h im engaging in such a private act, was revolutionary. This was meant to make the audience uncomfortable, to make them see sexuality in another way. In the final scene, the faun lies down on top of the scarf and, with obvious erotic desire, starts thrusting his pelvis until the end of the ballet. The faun engages sexually with the object for what is purely self-pleasure, showing the animalistic desires of man. It was a display of sexuality purely for the faun’s sake, rather than as traditional display of love. This was not love between a man and a woman, not even between two humans, this was pleasure for gender neutral figure. These ideas of alternative sexual and gender identities were new for the century. The ballet’s final scene caused a scandal with its sexual frankness. In the newspaper Le Figaro, one of the leading French morning daily newspapers, the editor Gaston Calmette wrote, We have had a faun, incontinent, with vile movements of erotic bestiality and gestures of heavy shamelessness. To him, Nijinskys dance was the too-expressive pantomime of the body of an ill-made beast, hideous, from the front, and even more hideousShow MoreRelatedEssay about Listening Report1776 Words   |  8 Pages Concert Analysis: Songs Around the Word I Offer Thee by Allen Ridout 1.nbsp;nbsp;nbsp;nbsp;nbsp;Gregorian chant consists of a single-lined melody and is monophonic in texture. This piece also consists of these basic structures as well as not having any harmory or counterpoint. This piece performed by U of I faculty member Steven Rickards, is sung a cappella. 2.nbsp;nbsp;nbsp;nbsp;nbsp;This piece differs from the traditional Gregorian chant of the Middle ages because of the jumps and leaps