ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Asynchronous JavaScript and XML (AJAX) has improved web applications in a way that has enhanced performance and made the user experience more like that of a desktop application. As the performance of PCs increases and broadband Internet access is more prevalent, switching between web pages is less painful than ever. One of the biggest advantages of AJAX is the ability for a web application to update only a small piece of data without refreshing the whole page. AJAX also allows for piecewise validation of user entry as opposed to the standard form entry with which we have become so accustomed. This paper describes how AJAX enabled applications are different from classic web applications and shows the advantages and disadvantages from both client and server sides of an AJAX enabled application. AJAX is not a new technology, but rather a new approach to web applications that uses standards already in place for XHTML, CSS, DOM, XML, and JavaScript. It is this new approach that eliminates the full page refresh that was so commonplace and now gives web applications the ability to look and feel more like desktop applications.

Populiarėjant AJAX technologiją naudojančioms sistemoms vis labiau aktualios darosi šios technologijos įtakojamos problemos. Verta paminėti, kad kai kurie tradicinių internetinių sistemų trūkumai dar labiau paaštrėja ir yra sunkiau aptinkami naujos kartos internetinėse sistemose. Dėl šios priežasties dauguma programuotojų anksčiau ar vėliau susiduria su įprastomis AJAX aplinkos problemomis: naršyklės navigacijos mygtukų panaudojimu, adresų išsaugojimu, paieškos varikliukų problema ir pan. Magistriniame darbe „Asinchroninių metodų interneto technologijose tyrimas“ pateikiamas AJAX pagrindu veikiančio karkaso projektas apima dažniausiai pasikartojančių problemų, kylančių kuriant šią technologiją naudojančias sistemas, sprendimus. Pateikiami sprendimai apima patį duomenų mainų mechanizmą, įskaitant patogesnio jo taikymo galimybes, navigacijos mygtukų panaudojimo problemas, suderinamumą su paieškos sistemų varikliukais, taip pat būdus kaip galima padidinti sistemos saugumą. / While internet applications based on AJAX technology becomes more and more popular, respectively problems rising from this technology becomes more and more serious. It is worth to mention, that some sorts of problems which comes from internet applications working in an old way, becomes more actual and harder to catch in systems of new generation. Due to this reason, lots of software developers sooner or later faces common AJAX problems: using of browser’s buttons, bookmarking pages, search engines (like Google) problems, etc. This work describes project of AJAX framework. Framework includes solutions for most common problems that faces programmers while developing AJAX based internet applications. Solutions covers the way of data exchange, including possibilities of using it more handy, browser’s navigation button problems, compatibility with search engines. It also covers ways in which could be increased application’s security.

During the past decade, web applications have evolved substantially. Taking advantage of new technologies, Rich Internet Applications (RIAs) make heavy use of client side code to present content. Web crawlers, however, face new challenges in crawling RIAs, such as how to explore and identify different client states. The problem of crawling RIAs has been a focus for researchers during recent years, and solutions have been proposed based on constructing a state-transition model with DOMs as states and JavaScript events as transitions. When faced with real-life RIAs, however, a major problem prevalent in current solutions is state space explosion caused by the complexity of the RIAs. This problem prevents the automated crawlers from being usable on complex RIAs as they fail to produce useful results in a timely fashion. This research addresses the challenge of efficiently crawling complex RIAs with two main ideas: component-based crawling and similarity detection. Our experimental results show that these ideas lead to a drastic reduction of the time required to produce results, enabling the crawler to explore RIAs previously too complex for automated crawl.

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During the past decade, web applications have evolved substantially. Taking advantage of new technologies, Rich Internet Applications (RIAs) make heavy use of client side code to present content. Web crawlers, however, face new challenges in crawling RIAs, such as how to explore and identify different client states. The problem of crawling RIAs has been a focus for researchers during recent years, and solutions have been proposed based on constructing a state-transition model with DOMs as states and JavaScript events as transitions. When faced with real-life RIAs, however, a major problem prevalent in current solutions is state space explosion caused by the complexity of the RIAs. This problem prevents the automated crawlers from being usable on complex RIAs as they fail to produce useful results in a timely fashion. This research addresses the challenge of efficiently crawling complex RIAs with two main ideas: component-based crawling and similarity detection. Our experimental results show that these ideas lead to a drastic reduction of the time required to produce results, enabling the crawler to explore RIAs previously too complex for automated crawl.

Den ökade användningen av nätuppkopplade mobilapplikationer har resulterat i en överbelastning i 3G-nätet. Förslag för att avlasta nätet har bland annat varit genom alternativa uppkopplingar, vilket innebär en uppoffring av 3G-nätets tillgänglighet. Detta leder till frågor om andra avlastningsmetoder. Arbetets målsättning var att se hur en applikations datatrafik påverkas av att klassiska intervallanrop ersätts av avvaktande AJAX-anrop. Detta görs genom att implementera respektive anropsmetod i två identiska alfapetapplikationer. Mätdata erhölls genom att låta användare spela längre omgångar av respektive applikation, vilket även genererar realistiska uppdateringar. Resultaten visar att den klientgenererade bandbreddskonsumtionen minskas vid användning av avvaktande AJAX-anrop. Detta gör den, i kontrast med klassiska intervallanrop, till en möjlig avlastningsmetod.

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Ajax is quite new technology in world of web pages creation. In fact, it consits of more programming techniques like Javascript, PHP and XML. The main advantage of this technique is contacting server side on the background. This paper is focused on creating educational application for internet environment. There is written about solution for user’s interface and interface for administration.

This master's thesis is focused on description of possible types of e-learning systems as the modern way of education and its support using computer technology, its components and methods assessment used for educational systems creation and the most accessible and most convenient method for creating elearning selection. On the basis of obtained knowledge was created an educational system using PHP and AJAX technology. The main objective of this thesis is the development of e-learning system with accurate requirements for its functionality and description of the method of achieving the desired properties of individual parts of the system.