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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Mobilt övervakningssystem : System för internetkommunikation mellan sensorer, webbsida, server och databas

Stålberg, Ingela January 2012 (has links)
This thesis has been carried out in cooperation with a company which develops mobile sensor platforms. The sensors measure different types of data such as temperature, pressure etc.. They will communicate through the internet with a server that stores data in a database. This system will be controlled and monitored through a web page. The project's aim has been to develop this system and to implement a server, a database, a website and a client application that simulates sensor signals. In addition, the performance of the server should be measured and a usability test should be performed. To measure the performance of the server, different variants of the client program, which continuously sent data from an increasing number of clients to the server, were developed. In the usability test the participants had to solve a number of tasks after which they answered a survey and were interviewed.The result is a communication system that works according to the requirements and a client program that is also used for testing the server. The investigation of the server performance showed a maximum bandwidth of about 370 kb/s while serving up to 70 clients. The database consumed 95% of the bandwith. However, with a rising number of clients there was a continous decline in the performance. In usability tests, there was a big difference in how people perceive computer programs depending on their experience and education. For this application, the server worked well, but if the project is to be developed into a large scale, it then becomes relevant to move onto an asynchronous working server instead of a thread-server. Queries to a database (MySQL) considerably decreases bandwidth and should be optimized where possible.
22

Fotozonen : att skapa en internetportal med PHP

Brax, Philip January 2003 (has links)
No description available.
23

Design and Implementation of VoIP System with Fault Tolerance and Load Balance

Hou, Cheng-chih 23 July 2007 (has links)
Because of the maturation of the VoIP technique, VoIP can not only satisfy the basic requirement of telecommunication but also provide multimedia communication services. As a result, it is very attractive in recent years. Through VoIP, the cost of communication can be saved. It can be very competitive. In addition, VoIP can be combined with PSTN (Public Switched Telephone Network). This helps traditional PSTN users to be able to use traditional telephones to make VoIP calls.Besides, VoIP can also extend other services. It can achieve diversification of services, comfortable using and reducing the cost requirement. Moreover, with the increasing of the VoIP population, the traditional method using single server is unable to afford so much loading. It is possible that the large load makes the service stop anytime. This makes the usability and the reliability decrease. To make the VoIP service work anytime, we implement a method in both client side and server side to achieve the goal of continuous providing of the service. From this implementation, the service of VoIP can be provided anytime. The users, however, have no need to be aware of the different operation style in VoIP.
24

Kelių transporto priemonių informacinės sistemos "KETRIS" išplėtimai / The Extensions of the Vehicles Information System "Ketris"

Trainys, Vilius 10 September 2004 (has links)
These thesis analyses the extensions of the "Ketris" system used by the State institution of the "Regitra" which allow automating the actions of checking the declarable income and writing certificates.
25

Šiuolaikinių duomenų bazių programavimo metodų palyginimas / Modern data bases programming methods comparison

Ivanauskienė, Erika 14 June 2006 (has links)
The purpose of this paperwork is to analyze the programming methods of various modern data bases and apply them for the solution of real problems. ADO and ADO.NET component programming methods have been used to attain this purpose. The investigation has been made using different systems of data bases and different numbers of recordings. The results of investigation were applied for the practical implementation of problem solution; and that is estimate data.
26

Utveckling av internt Administrationssystem

Lind, Jonas January 2014 (has links)
This thesis work is executed at Business Unit Ericsson Test Environment (BETE), in Linköping. BETE is the department at Ericsson, which is responsible for the operation and maintenance of the company's Operations Support System (OSS). Their management system was outdated and they wanted it to be updated and it also required new features. The database needed to be replaced and the data migrated to a new database without licensing costs. The system also needed a part where employees could manage existing users. As a programming language PHP was chosen for its dynamic possibilities, platform independence and good support for database intergration. For database MySQL was chosen because it is free and covers our needs. The result was a fully functional version of the internal administrationssytem that was ready to be used. This report is about how we proceeded to migrate the database and renew the management system. It also contains the problems encountered and what solutions we developed. / Detta examensarbete är utfört åt Business Unit Ericsson Test Environment (BETE), i Linköping. BETE är den avdelning på Ericsson som är ansvarig för drift och underhåll av företagets Operation Support System (OSS). Deras administrationssystem var föråldrat och de ville att den skulle uppdateras och få nya funktioner. Informationen i den gamla databasen skulle behållas men överföras till en ny databas utan licenskostnader. Systemet behövde även en del där anställda kan hantera befintliga användare. Som programmeringsspråk valdes PHP för dess dynamiska möjligheter, plattformsoberoende och goda stöd för databaskopplingar. För lagring av data används en MySQL-databas eftersom den är gratis, täcker våra behov och är enkel att integrera med PHP. Resultatet blev en fullt funktionell version av BETEs interna administrationssytem som är klart för att tas i bruk. Denna rapport handlar om hur vi gått tillväga för att migrera databasen och förnya administrationssystemet, om vilka problem som uppstått och vilka lösningar som tagits fram.
27

Databases For Mediation Systems : Design and Data scaling approach

Ayyagari, Nitin Reddy January 2015 (has links)
Context: There is continuous growth in data generation due to wide usage of modern communication systems. Systems have to be designed which can handle the processing of these data volumes efficiently. Mediation systems are meant to serve this purpose. Databases form an integral part of the mediation systems. Suitability of the databases for such systems is the principle theme of this work. Objectives: The objective of this thesis is to identify the key requirements for databases that can be used as part of Mediation systems, gain a thorough understanding of various features, the data models commonly used in databases and to benchmark their performance. Methods: Previous work that has been carried out on various databases is studied as a part of literature review. Test bed is set up as a part of experiment and performance metrics such as throughput and total time taken were measured through a Java based client. Thorough analysis has been carried out by varying various parameters like data volumes, number of threads in the client etc. Results: Cassandra has a very good write performance for event and batch operations. Cassandra has a slightly better read performance when compared to MySQL Cluster but this differentiation withers out in case of fewer number of threads in the client. Conclusions: On evaluation of MySQL Cluster and Cassandra we conclude that they have several features that are suitable for mediation systems. On the other hand, Cassandra does not guarantee ACID transactions while MySQL Cluster has good support. There is need for further evaluation on new generation databases which are not mature enough as of now.
28

Implementation av IT-system på mindre företag

Sahlén, Fredrik January 2014 (has links)
Detta examensarbete är utfört åt Alnöbud och Transport i Sundsvall. Alnöbud och Transport håller påmed transport inom såväl Sundsvall som ute i landet. Deras tidrapporteringssystem var föråldrat och de använder sig idag av papper och penna för att registrera de olika anställdas tider. De ville dåveta hur man skulle kunna datorisera detta påett enkelt, smart och prisvärt sätt. Genom att gå till grunden för hur ett litet företag i dagens läge skulle kunna gå tillväga för att datorisera exempelvis ett sådant system krävdes genomgående information om allt från undersökningar, priser för liknande typer av kravspecifikationer och jämförande mellan olika produkter/tjänster. Detta resulterade i en Androidapplikation som valdes eftersom många anställda använder sig just av Android som operativsystem i telefonen. För lagring av data används en Apache server med språket MySQL eftersom den är gratis samt täcker våra behov och är väldigt enkel att navigera mot PHP, som vi använder att koppla ihop applikationen till databasen. Resultatet har utvärderas med en användbarhetsstudie som grundar sig påapplikationen och all dokumentering som följt med under vägen. Denna användbarhetsstudie visar om ett mindre företag bör satsa påatt datorisera sig mer och inte vara rädd för möjligheterna som ges inom datateknik. Slutsatserna av detta arbete är att tidsbesparingen har ökat markant samt att det är billigare att köpa tjänsterna istället för att anställa personal.
29

Location Based Task-To-Do Manager

Opuogen, Philip Jolomi January 2014 (has links)
Ever had an experience of forgetting to do something very important on a place you just past?. Remembering, on arrival at your destination afterward, requires an action to return to the task location. This can be unproductive and perhaps result to frustration. The purpose of this thesis is to develop a “Location Task-To-Do manager” an android mobile application that will efficiently organizes task-to-do list and remind an individual to perform a task at a pre-defined location through notification and alert messages. The methods used includes,  investigation of pre-existing systems, requirement elicitation survey technique, three-tier architecture design pattern, iterative development life-cycle model, acceptance test plan and a sets of other technology such as  Java SDK, Android APIs, TCP/IP protocol, object oriented programing techniques and MySql relational database. The result showed that, installed “Location Task-To-Do manager” application on individual mobile devices/smartphones were capable of creating task, adding task, editing task, deleting task, sharing task and setting task location through its user friendly graphical interfaces. Users are able to receive notification to perform a task within a minimum distance of 1km to the exact task location.
30

Entwicklung eines neuen LVP-Systems mit MySql-Datenbank Anbindung in C++ und Trolltech's GUI-Toolkit Qt

Schumacher, Bernd. January 2003 (has links)
Konstanz, FH, Diplomarb., 2003.

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