This project is dealing with creating of system for e-learning support. It describes problematics of e-learning, explains meaning of this term and describes its advantages and disadvantages. The objectives were to create an application suitable for electronic learning, which could illustrate specifications of restrictions of the system objects. This means to create an application, where is explained the problem of OCL in that kind of format, which reacts the structure and the form of application used for e-learning. I meet the program languages of OCL and UML 2.0. I read over the CASE Rational Rose environment and meet the e-learning problem, too. These are the knowledges, which I used while I was creating my e-learning application.

This master thesis dives a brief introduction to the languages for creating web information systems and languages for creating web pages. It describes existing modular systems for publication (also known as content management systems, CSM), their advantages  and disavantages. Requirements for the Content Management System are specified and the  general scheme (ERD) for such a system is proposed. Presented system is realised in PHP and database system MySQL. Implemented user-friendly aplication running on the server communicates developed system that provides content management functions.

The main objective of this work is to design and implement an application that can be used as an aid for the education of programming essentials. Particularly, the attention focuses on the domain of dynamic data structures. The target application will be implemented with the use of web technologies so that it can be run in an ordinary WWW browser. First of all, a brief introduction recapitulates the data structures to be covered. Then the work summarizes the usable technologies available within the web browsers with the focus on the particular technology (which is DHTML) that will become the target platform. The most significant part of this work then discusses the design of the final application. This rather theoretical part is then followed by the description of the practical implementation. A short user manual is also included.

The master's thesis discusses the project and implementation of study statistics of the Portal of Brno University of Technology. It analyses the structure of the BUT portal and the technologies used for its creation. The technologies we are speaking about are the server-side scripting language PHP, query language SQL and cascading style sheets CSS. It describes the Oracle database technology and the st01 database scheme, a large scheme containing data used by information systems. It analyses the initial state of web applications and the situation at single faculties. The thesis analyses different solutions of certain parts of the application and studies the most appropriate ones. At the end it describes the implementation of study statistics and its integration into the central information system.

Document server is a web application controllable by way of web browser. It is meant to serve for the management of development documentation. The application is divided to the four basic parts: Requirements, Products, Tests and Test Run. The section Requirements serves for inserting requirements for products. Product is produced on the basis of these needs and registered in part Products. Test setting is created in the part Tests according to requirements from the part Requirements. Particular products are then tested. The part Test Run registers records of these tests. These are parts of the application: management of users, connecting supplements to records, printing and exportation of data to different formats, saving history of records, filtration and sorting of entries, etc. All the data is saved in the database MySQL. The application is written in scripting language PHP. Data is presented by template system Smarty. The output is in language XHTML. Cascading style CSS is used to formatting. This work describes development of the application. First it is dealing with the proposal of the database, connection and structure of particular tables. The function of the programme is explained in detail at the same time, which is essential for the correct proposal of the database. The application is based on the database. The selected structure of files and relations of scripts to library functions are shown. The template system and the interface for access of the programme to the database are explained. The most attention is paid to the description of solving important functions of the application, i.e. listing of records, their pagination, filtration, sorting and operation with them: saving, browsing, copying, confirmation and work with history, category and problems by upkeep of consistent tree and export of data to various formats. It is always outlined the problem, the idea of solving and the description of appropriate scripts. Samples of source code are also included for better understanding of complicated algorithms.

Studentkonsultprojekt gör det möjligt för studenter att applicera sin kunskap i näringslivet samtidigt som det blir mindre kostsamt för företagen att anlita konsulter. Då jobbsökande via internet blir allt vanligare finns det ett behov av en webbapplikation för konsultuppdrag som kopplar samman studenter och företag. En av de viktigaste aspekterna för att skapa en konkurrenskraftig webbapplikation är användbarheten. Således är intentionen med denna studie att undersöka Hur kan en webbapplikation för konsultuppdrag mellan företag och studenter implementeras för att uppfattas som användbar av studenter? För att besvara frågeställningen har en webbapplikation för förmedling av konsulttjänster mellan företag och studenter utvecklats. Webbapplikationen baseras på en teoretisk grund där olika dimensioner av begreppet användbarhet analyserats. De dimensioner som lyfts är effektivitet, ändamålsenlighet och tillfredsställelse. I tillägg till detta har vikten av att specificera användare och de estetiska aspekternas påverkan på användbarhet behandlats. För att utvärdera om webbapplikationen upplevs som användbar testas den på tre testgrupper i tre olika skeden för att undersöka deras upplevelse av webbapplikationen. Testerna utgår från metoden thinking aloud tillsammans med enkäterna System Usability Scale (SUS) och Visual Aesthetics of Websites Inventory Short (VisAWI-S). SUS- och VisAWI-S-enkäterna gav indikationer på en starkt användbar applikation genom hela utvecklingsprocessen. Detta utifrån implementation av en design som främst utgick från principerna enkelhet och färgrikedom samt fokusområdena Synlighet av systemstatus, Igenkänning istället för återkallande, Flexibilitet och effektiv användning och Estetisk och minimalistisk design. Genom att analysera resultaten från thinking aloud-testerna kunde en tydlig minskning av negativa kommentarer identifieras mellan användartest 1-3. Utifrån dessa testresultat, dras slutsatserna att genom återkoppling relaterad till utförda aktioner, implementation av markörer och färgval med hänsyn till kontraster kan en webbapplikation för konsultjobb implementeras för att uppfattas som användbar av studenter. / Studentconsulting makes it possible for students to use their knowledge in business cases. In addition to this it also reduces the cost for enterprises when hiring consultants. As job hunting via the internet becomes more common there is a need for a web application that connects company projects with students who are interested in consulting. One of the most prominent aspects for a web application to be competitive is usability. The intention with this study is to examine How can a webapplication for consulting jobs between enterprises and students be implemented to be perceived as useful by students? To answer this question a web application for intermediation of consulting jobs between enterprises and students has been developed. The web application is developed on a theoretical basis where the different dimensions of the term usability has been analysed. These dimensions are efficiency, effectiveness and satisfaction. In addition to this the importance of specifying users and the aesthetic aspects effects on usability has been discussed. To evaluate if the web aplication is perceived as useful it is tested on three groups of people on three different occasions to examine their perception of the web application. The tests are based on the thinking aloud method together with the questionnaires System Usability Scale (SUS) and Visual Aesthetics of Websites Inventory Short (VisAWI-S). The SUS and VisAWI-S questionnaires indicated that the web application had a high level of usability throughout the development process. This was achieved through implementing a design based on simplicity and colorfulness as well as the principles Visibility of system status, Recognition rather than recall, Flexibility and efficiency of use and Aesthetic and minimalist design. By analysing the results from the thinking aloud tests a reduction in negative comments between test 1 and 3 could be identified. From the test results, the conclusion is that through responses related to completed actions, implementation of markers, and contrasting colors a web application for consulting jobs between enterprises and students can be implemented to be perceived as useful by students.

The research conducted for this thesis seeks to understand issues associated with integrating a direct spread spectrum system (DSSS) transceiver on to a single chip. Various types of sequences, such as Kasami sequences and Gold sequences, are available for use in typical spread spectrum systems. For this thesis, complex spreading sequences (CSS) are used for improved cross-correlation and autocorrelation properties that can be achieved by using such a sequence. While CSS and DSSS are well represented in the existing body of knowledge, and discrete bulky hardware solutions exist – an effort to jointly integrate CSS and DSSS on-chip was identified to be lacking. For this thesis, spread spectrum architecture was implemented focussing on sub-systems that are specific to CSS. This will be the main contribution for this thesis, but the contribution is further appended by various RF design challenges: highspeed requirements make RF circuits sensitive to the effects of parasitics, including parasitic inductance, passive component modelling, as well as signal integrity issues. The integration is first considered more ideally, using mathematical sub-systems, and then later implemented practically using complementary metal-oxide semiconductor (CMOS) technology. The integration involves mixed-signal and radio frequency (RF) design techniques – and final integration involves several specialized analogue sub-systems, such as a class F power amplifier (PA), a low-noise amplifier (LNA), and LC voltage-controlled oscillators (VCOs). The research also considers various issues related to on-chip inductors, and also considers an active inductor implementation as an option for the VCO. With such an inductor a better quality factor is achievable. While some conventional sub-system design techniques are deployed, several modifications are made to adapt a given sub-system to the design requirements for this thesis. The contribution of the research lies in the circuit level modifications done at sub-system level aimed towards eventual integration. For multiple-access communication systems, where a number of independent users are required to share a common channel, the transceiver proposed in this thesis, can contribute towards improved data rate or bit error rate. The design is completed for fabrication in a standard 0.35-μm CMOS process with minimal external components. With an active chip area of about 5 mm2, the simulated transmitter consumes about 250 mW&the receiver consumes about 200 mW. AFRIKAANS : Die navorsing wat vir hierdie tesis onderneem is, beoog om kundigheid op te bou aangaande die kwessies wat met die integrasie van ‘n direkte spreispektrumstelsel (DSSS) sender-ontvanger op ‘n enkele skyfie verband hou. Verskeie tipes sekwensies, soos byvoorbeeld Kasami- en Gold-sekwensies, is vir gebruik in tipiese spreispektrumstelsels beskikbaar. Vir hierdie tesis is komplekse spreisekwensies (KSS) gebruik vir verbeterde kruis- en outokorrelasie-eienskappe wat bereik kan word deur so ‘n sekwensie te gebruik. Alhoewel DSSS en KSS reeds welbekend is, en diskrete hardeware oplossings reeds bestaan, is die vraag na gesamentlike geïntegreerde DSSS en KSS op een vlokkie geïdentifiseer. Vir hierdie tesis is spreispektrumargitektuur aangewend met die klem op KSS substelsels. Dit is dan ook die belangrikste bydrae van hierdie tesis, maar die bydrae gaan verder gepaard met verskeie RF-ontwerpuitdagings: hoëspoed-vereistes maak RF-stroombane sensitief vir die uitwerking van parasitiese komponente, met inbegrip van parasitiese induktansie, passiewe komponentmodellering en ook seinintegriteitskwessies. Die integrasie word eerstens meer idealisties oorweeg deur wiskundige substelsels te gebruik en dan later prakties te implementeer deur komplementêre metaaloksied-halfgeleiertegnologie (CMOS) te gebruik. Die integrasie behels gemengdesein- en radiofrekwensie(RF)-ontwerptegnieke – en finale integrasie behels verskeie gespesialiseerde analoë substelsels soos ‘n klas F-kragversterker (KV), ‘n laeruis-versterker (LRV), en LC-spanningbeheerde ossileerders (SBO’s). Die navorsing oorweeg ook verskeie kwessies in verband met op-skyfie induktors en oorweeg ook ‘n aktiewe induktorimplementering as ‘n opsie vir die SBO. Met sodanige induktor is ‘n beter kwaliteitsfaktor haalbaar. Hoewel enkele konvensionele substelsel-ontwerptegnieke aangewend word, word daar verskeie wysigings aangebring om ‘n gegewe substelsel by die ontwerpvereistes vir hierdie tesis aan te pas. Die bydrae van die navorsing is hoofsaaklik die stroombaanmodifikasies wat gedoen is op substelselvlak om integrasie te vergemaklik. Vir veelvoudige-toegang kommunikasiestelsels waar ‘n aantal onafhanklike gebruikers dieselfde seinkanaal moet deel, kan die sender-ontvanger voorgestel in hierdie tesis meewerk om die datatempo en fouttempo te verbeter. Die ontwerp is voltooi vir vervaardiging in ‘n standaard 0.35-μm CMOS-proses met minimale eksterne komponente. Met ‘n aktiewe skyfie-oppervlakte van ongeveer 5 mm2, verbruik die gesimuleerde sender ongeveer 250 mW en die ontvanger verbruik ongeveer 200 mW. / Thesis (PHD)--University of Pretoria, 2011. / Electrical, Electronic and Computer Engineering / unrestricted

Since the frantic race towards the Shannon bound [1] commenced in the early 1950’s, linear block codes have become integral components of most digital communication systems. Both binary and non-binary linear block codes have proven themselves as formidable adversaries against the impediments presented by wireless communication channels. However, prior to the landmark 1974 paper [2] by Bahl et al. on the optimal Maximum a-Posteriori Probability (MAP) trellis decoding of linear block codes, practical linear block code decoding schemes were not only based on suboptimal hard decision algorithms, but also code-specific in most instances. In 1978 Wolf expedited the work of Bahl et al. by demonstrating the applicability of a block-wise Viterbi Algorithm (VA) to Bahl-Cocke-Jelinek-Raviv (BCJR) trellis structures as a generic optimal soft decision Maximum-Likelihood (ML) trellis decoding solution for linear block codes [3]. This study, largely motivated by code implementers’ ongoing search for generic linear block code decoding algorithms, builds on the foundations established by Bahl, Wolf and other contributing researchers by thoroughly evaluating the VA decoding of popular binary and non-binary linear block codes on realistic narrowband and wideband digital communication platforms in lifelike mobile environments. Ideally, generic linear block code decoding algorithms must not only be modest in terms of computational complexity, but they must also be channel aware. Such universal algorithms will undoubtedly be integrated into most channel coding subsystems that adapt to changing mobile channel conditions, such as the adaptive channel coding schemes of current Enhanced Data Rates for GSM Evolution (EDGE), 3rd Generation (3G) and Beyond 3G (B3G) systems, as well as future 4th Generation (4G) systems. In this study classic BCJR linear block code trellis construction is annotated and applied to contemporary binary and non-binary linear block codes. Since BCJR trellis structures are inherently sizable and intricate, rudimentary trellis complexity calculation and reduction algorithms are also presented and demonstrated. The block-wise VA for BCJR trellis structures, initially introduced by Wolf in [3], is revisited and improved to incorporate Channel State Information (CSI) during its ML decoding efforts. In order to accurately appraise the Bit-Error-Rate (BER) performances of VA decoded linear block codes in authentic wireless communication environments, Additive White Gaussian Noise (AWGN), flat fading and multi-user multipath fading simulation platforms were constructed. Included in this task was the development of baseband complex flat and multipath fading channel simulator models, capable of reproducing the physical attributes of realistic mobile fading channels. Furthermore, a complex Quadrature Phase Shift Keying (QPSK) system were employed as the narrowband communication link of choice for the AWGN and flat fading channel performance evaluation platforms. The versatile B3G multi-user multipath fading simulation platform, however, was constructed using a wideband RAKE receiver-based complex Direct Sequence Spread Spectrum Multiple Access (DS/SSMA) communication system that supports unfiltered and filtered Complex Spreading Sequences (CSS). This wideband platform is not only capable of analysing the influence of frequency selective fading on the BER performances of VA decoded linear block codes, but also the influence of the Multi-User Interference (MUI) created by other users active in the Code Division Multiple Access (CDMA) system. CSS families considered during this study include Zadoff-Chu (ZC) [4, 5], Quadriphase (QPH) [6], Double Sideband (DSB) Constant Envelope Linearly Interpolated Root-of- Unity (CE-LI-RU) filtered Generalised Chirp-like (GCL) [4, 7-9] and Analytical Bandlimited Complex (ABC) [7, 10] sequences. Numerous simulated BER performance curves, obtained using the AWGN, flat fading and multi-user multipath fading channel performance evaluation platforms, are presented in this study for various important binary and non-binary linear block code classes, all decoded using the VA. Binary linear block codes examined include Hamming and Bose-Chaudhuri-Hocquenghem (BCH) codes, whereas popular burst error correcting non-binary Reed-Solomon (RS) codes receive special attention. Furthermore, a simple cyclic binary linear block code is used to validate the viability of employing the reduced trellis structures produced by the proposed trellis complexity reduction algorithm. The simulated BER performance results shed light on the error correction capabilities of these VA decoded linear block codes when influenced by detrimental channel effects, including AWGN, Doppler spreading, diminished Line-of-Sight (LOS) signal strength, multipath propagation and MUI. It also investigates the impact of other pertinent communication system configuration alternatives, including channel interleaving, code puncturing, the quality of the CSI available during VA decoding, RAKE diversity combining approaches and CSS correlation characteristics. From these simulated results it can not only be gathered that the VA is an effective generic optimal soft input ML decoder for both binary and non-binary linear block codes, but also that the inclusion of CSI during VA metric calculations can fortify the BER performances of such codes beyond that attainable by classic ML decoding algorithms. / Dissertation (MEng(Electronic))--University of Pretoria, 2006. / Electrical, Electronic and Computer Engineering / unrestricted

This thesis consider description of segments identified in image. At first there are described main methods of segmentation because it is a process contiguous before describing of objects. Next chapter is devoted to methods which focus on description identified regions. There are studied algorithms used for characterizing of different features. There are parts devoted to color, location, size, orientation, shape and topology. The end of this chapter is devoted to moments. Next chapters are focused on designing fit algorithms for segments description and XML files creating according to MPEG-7 standards and their implementation into RapidMiner. In the last chapter there are described results of the implementation.

The work deals with internet commerce. It includes analysis and design their own e-shop. The aim was to bring the marketing plan for market entry, assess the achievements and propose a procedure to other years. It can be familiar with basic knowledge about internet marketing, internet business analysis in comparison with the stone business. These general theoretical and practical knowledge is given to about half the work. In the second half is giving its own Internet business, the introduction of the marketing and promotion.