Este trabalho propõe políticas para servidores Web baseados em sessões, visando ao oferecimento de garantias de qualidade de serviço (Quality of Service - QoS) a seus usuários. Para o fornecimento de QoS, dois tipos de políticas são consideradas: as responsáveis pela diferenciação de serviços e as responsáveis pelo controle de admissão. Alguns algoritmos de escalonamento foram desenvolvidos com o objetivo de oferecer melhores serviços para as sessões prioritárias: o algoritmo de escalonamento baseado em sessão (SBSA) e o algoritmo de escalonamento baseado em sessão com diferenciação de serviços (SBSA-DS). Quanto ao controle de admissão, foram consideradas duas novas políticas, as quais utilizam diferentes parâmetros para a tomada de decisão e têm como objetivo garantir a finalização do maior número de sessões prioritárias. A partir dos resultados obtidos nos experimentos realizados por meio de simulação, constatou-se que o emprego dos algoritmos e das políticas desenvolvidos melhora o atendimento das sessões para as quais deve ser oferecido um serviço preferencial. Portanto, em servidores Web preocupados com a garantia de QoS para seus usuários, os quais interagem com o sistema por meio de sessões, o uso dessas novas técnicas se mostra adequado / This work considers policies for Web servers based on sessions, aiming at the guarantees of Quality of Service (QoS) to the systems users. Two types of policies are considered: the responsible for the differentiation of services and the responsible for the admission control. Some scheduling algorithms had been developed to offer better services for the priority sessions: the Session Based Scheduling Algorithm (SBSA) and the Session Based Scheduling Algorithm with Differentiation of Services (SBSA-DS). In relation to the admission control, two new policies had been considered, which use different parameters to help the decisions and have as objective guarantee the finalization of as many priority sessions as possible. From the obtained results of the experiments realized by mean of simulation, it is evidenced that the use of the developed algorithms and policies improves the attendance of the sessions that deserve preferential service. Therefore, in Web servers worried in the guarantee the QoS for their users, which interact with the system by sessions, the use of these new techniques reveals adequate

Esta dissertação de mestrado apresenta o projeto, implementação e teste de um gerador de carga de trabalho para servidores Web que permite a caracterização de sessões e que representa uma carga real. O gerador desenvolvido gera carga visando à alimentar programas que simulam o comportamento de servidores Web. Para a definição dos parâmetros utilizados no gerador de carga sintética desenvolvido, diversos estudos sobre a carga em servidores Web encontrados na literatura, logs de servidores Web reais e benchmarks para servidores Web, foram utilizados. Vários algoritmos de controle de admissão e de escalonamento de requisições descritos na literatura foram implementados para teste e validação do gerador desenvolvido. Visando a utilização de sessões, é proposto nesta dissertação um algoritmo de controle de admissão, RED-SB (Random Early Detection - Session Based) que se baseia em um algoritmo (RED) que não considera sessão. Esses algoritmos foram executados utilizando-se um modelo de simulação de servidor Web com suporte a diferenciação de serviços, chamado SWDS (Servidor Web com Diferenciação de Serviços) / This MSc dissertation presents the design, implementation and tests of a workload generator for Web servers that allows the characterization of sessions and represents a real workload. The generator developed generates a workload to be used as an input to programs that simulate the behavior of Web servers. For the definition of the parameters used in the synthetic workload generator developed, several studies about the web server load described in the literature, actual web server logs and benchmarks for Web servers were used. Several algorithms for admission control and scheduling of requests described in the literature were implemented for testing and validation of the generator developed. Aiming at the utilization of sessions, this dissertation proposes an admission control algorithm RED-SB (Random Early Detection - Session based) which is based on an algorithm (RED) that does not consider session. These algorithms were implemented using a simulation model ofWeb server that supports service differentiation, called SWDS (Web Server with Service Differentiation)

This was a project to develop a Telephone Directory Web service (TDWS) to provide convenient and cost-effective access to public telephone directory data.

The primary purpose of this project is to develop an online forum to facilitate communication among educators, parents, and students resulting in an open environment for more informed decisions by all those involved in the educational process. The second purpose is the personal development of an electronic learning application using online tools needed for an effective online learning environment that will cost the school district little or nothing.

The purpose of this project is to develop a generic Java Application Programming Interface (API) that would be used to provide security and user privacy to functions such as data transfer, key management, digital signature, etc.

Technologies that use cloud computing have increased considerably in the last decades. Computer services that we had in local devices have evolved to cloud services, resulting in applications such as online shopping stores, streaming platforms, or databases of large companies. In order to store and manage all the information that these types of services create, data centers were built and have been increasing in number and size in the last years. A big part of these databases is formed by server infrastructures, which are the devices that are responsible for storing and managing the data. Considerable research has been carried out to analyze the quantity of energy that servers consume and reduce it. What has been less considered is the environmental impact that servers have, not when they are operational but in the production phase (material gathering, transportation, assembly, etc.). A Systematic Literature Review (SLR) has been carried out to answer the research question that has been defined. The environmental impact of different stages is presented confirming the idea that other life cycle phases also have a big importance in the total environmental impact. Methods to reduce that impact are also explained.

This diploma thesis deals with the analysis, design, implementation and testing of an information system for a small farmer. The aim of this system is to administer customers, an income and outcome, orders, to manage notes, and possibility to track the occurrence pests of crops. The thesis describes options for the development of information systems, detailed specifications requirements and the design of system. Further is described the implementation, especially then the way to get information about pests and then testing the application. The information system is realized in the language C# as a desktop application using the framework .NET and the design pattern MVVM.

Master thesis is focused on analysis, design and development of information system module for the company XYZ s. r. o. The design of the module’s architecture, application objects identification and the development of the module including the economic evaluation are all based on the requirements acquired from the company. Modul is developed in new JavaScript version and uses modern technologies such as React, Redux, REST, Node.js and MongoDB.

Diploma thesis is focused on elaboration of database solution for saving measured data. In theory part analyses database query language and database management system Microsoft SQL Server 2017. Further in theory part is focused on programming environment for application development using C# .NET. Thesis includes database solution for saving measured data, service console application for saving data into the database and user application for creating new measuring, representation of data and user administration.

The diploma thesis focuses on the design, creation and implementation of a desktop application for managing a swimming database of the ASK Blansko swim club. It analyzes the current state of processes in the club and compares them with modern practice. It contains a description of all the functions of the application together with the economic evaluation of the project. It represents a complete solution because of the inefficient and outdated way of keeping the club database. It emphasizes the successful implementation of the application in the club practice.