The purpose of this paper is to clarify the differences in latency between PostgreSQL and MongoDB as a consequence of their differences in software architecture. This has been achieved through benchmarking of Insert, Read and Update operations with the tool “Yahoo! Cloud Serving Benchmark”, and through source code analysis of both database management systems (DBMSs). The overall structure of the architecture has been researched with Big O notation as a tool to examine the complexity of the source code. The result from the benchmarking show that the latency for Insert and Update operations were lower for MongoDB, while the latency for Read was lower for PostgreSQL. The results from the source code analysis show that both DBMSs have a complexity of O(n), but that there are multiple differences in their software architecture affecting latency. The most important difference was the length of the parsing process which was larger for PostgreSQL. The conclusion is that there are significant differences in latency and source code and that room exists for further research in the field. The biggest limitation of the experiment consist of factors such as background processes which affected latency and could not be eliminated, resulting in a low validity.

The goal of this thesis is to optimize the existing energy consumption monitoring system and expand the presentation options for the measured data in a way that would be suitable for large volume of data and a long period of time. Optimization concerns especially data processing and data presentation.

This thesis is focused on cybercrime, acquisition of evidence and development of a platform for retrieval, analysis and archiving web site data. The goal is to satisfy the investigators and security experts of the Czech police. The aim is to provide an open source platform that will be freely disseminable and in compliance with the requirements of legal institutions. The output of the thesis is two platform versions - full-fledged, fulfilling all the requirements set out in the diploma thesis and a light version for the police investigators of the Czech Republic.

The aim of this thesis is to analyze, design and implement solution for selling merchandise, which sellers can be used with commonly used hardware, free in basic package and they should be able to handle system setup. As a result, sellers can avoid new operating costs. The system will run as a service on Heroku servers. The front-end and back-end is implemented in JavaScript, front-end also uses React. GraphQL is used for communication between frontend and back-end. The data is stored in the PostgreSQL relational database, but also is used the Redis database, which runs tasks in the background.

The results of this work are two major projects - NpgObjects and PagedDataGridView. NpgObjects is a simple ORM framework to enable the mapping database tables to objects in the common language runtime. It contains a specially designed generator which generates classes in C# from information obtained from the database. These classes are mapping on the database tables one to one. NpgObjects allows all the basic database operations - SELECT, INSERT, UPDATE and DELETE. PagedDataGridView is a component for displaying tabular data. In cooperation with NpgObjects can paginate database data and manage the flow of data into application. It provides a comfortable user interface, which can easily navigate between different pages of data.

The first step of Master's thesis was to gain knowledge about technologies Adobe Flex SDK and Google Maps API. Knowledge was used to develop an application, which let users create, generate and modify graphical wireless network model. Position and characteristics of each single unit are monitored either in a map interface or in building plans. Dates are gathered from forms filled by current user, from external file or periodically from connected database system. Theoretical part enlightens technologies that were used. It describes program development and solutions, which were made, along with examples of the source code. Included are printscreens of graphical user interface as well as description of how does it all work.

This thesis is focused on PostgreSQL database system. You can find here introducing to temporal databases, database system PostgreSQL, proposal of temporal extension for PostgreSQL and implementation chapter with examples of using this extension. In this thesis is also using temporal database systems and use temporal databases in practise.

Im Rahmen dieser vorliegenden Arbeit soll untersucht werden, welche Möglichkeiten zur Sicherung einer möglichst hohen Verfügbarkeit (High-Availability), Mechanismen zur Lastverteilung mittels des ZEO-Produkts oder ähnlichem sowie welche Strategien des Cachings sinnvoll an einem ZOPE-Server zum Einsatz kommen können. Die Arbeit untersucht dabei die Einsatzmöglichkeiten von bereits vorhandenen und die eventuelle Notwendigkeit der Eigenimplementierung weiterer Produkte der ZOPE-Entwicklung. Den Rahmen der Arbeit bildet die Serverstruktur des Bildungsmarktplatzes Sachsen.

Aus historischen Gründen war die CSN Datenbank und die darauf zugreifenden Dienste immer auf dem selben Rechner. Zum einen aus Geldmangel, zum anderen, weil die Verteilung der Konfiguration und Zugriffssteuerung zur Datenbank ein ungelöstes Problem ist. Aufgabe dieser Arbeit ist die physikalische und logische Trennung der Firewall (und des Shapers) von der Datenbank. Dazu muss ein Dienst geschaffen werden, der die Konfigurationsinformationen für die Firewall und potentiell andere Applikationen bereitstellt. Der Zugriff auf diese Informationen muss vor Dritten geschützt werden. Im Weiteren soll eine Migrationstrategie entworfen werden, wie der Übergang zu der skizzierten Lösung bewerkstelligt werden kann.

Denna kandidatrapport är skriven av åtta studenter i kursen Kandidatprojekt i mjukvaruutveckling, TDDD96, vid Linköpings universitet under våren 2020. Kandidatrapporten inkluderar en sammanfattning av det arbete som utförts i projektet. Till projektet tillhörde ett uppdrag på beställning av Digitala resursenheten vid Linköpings universitet. Uppdraget var att skapa en webbapplikation där examinatorer och handledare för kurser vid Linköpings universitet på ett enkelt och intuitivt sätt kan beställa mjukvara till sina respektive kurser. Projektgruppen jobbade agilt och byggde projektet i Python samt JavaScript. Applikationen nådde alla mål satta tillsammans mellan kunden och projektgruppen och resulterade i en fungerande produkt som kunde utökas och modifieras enligt kundens behov. Till kandidatrapporten inkluderas även individuella bidrag skrivna av vardera gruppmedlem som djupdykt inom ett specifikt ämne eller område.