Search results for "550"
showing 10 items of 1192 documents
Kritiske suksessfaktorer og utfordringer ved innføring avtjenesteorientert arkitektur : en casestudie i Skatteetaten
2009
Masteroppgave i informasjonssystemer- Universitetet i Agder 2009 Tjenesteorientert arkitektur (Service-Oriented-Architecture (SOA)) ansees av mange for å være den beste måten å løse dagens utfordringer knyttet til videreutvikling og drift av komplekse og heterogene IT-systemer. SOA defineres i denne studien som en modulær virksomhetsarkitektur som fokuserer på de tjenestene som tilbys ved å bruke arkitekturen. SOA består av elementer som tjenester, teknologi, arkitektur, organisasjon, måling, styring og strategi. Denne studien har som målsetning å øke kunnskapen om hvordan virksomheter kan håndtere organisatoriske og teknologiske utfordringer ved innføring av SOA. Dette gjøres ved først å i…
Evaluering av IKT-investeringer i norsk kommunal sektor ved hjelp av balansert målstyring: barrierer og fremmere
2009
Masteroppgave i informasjonssystemer- Universitetet i Agder 2009 Offentlig sektor har de siste årene gjennomgått en moderniseringsprosess med kjernemål som effektivisering, brukerretting og forenkling. Det kommer stadig krav om bedre og mer effektiv tjenesteyting uten at mer ressurser stilles til disposisjon. IKT fremstår som et av de viktigste virkemidlene i jobben mot disse målene og det viser seg at det budsjetteres en betydelig sum av kommuners totale budsjett til IKT. Samtidig er det mangel på dokumentasjon på uthenting av nytteverdier, omstilling og effektivisering ved introduksjon av ny teknologi. En viktig årsak for dette kan være mangel på formell evaluering av investeringene som b…
Brukerinvolvering i ERP-implementeringer : raskeste vei til effektiv bruk av ERP-systemet?
2009
Masteroppgaver i informasjonssystemer- Universitetet i Agder 2009 Når en organisasjon går til det skrittet å implementere et så omfattende og komplekst system som det Enterprise Resource Planning‐systemer (ERP) er, så er det som alltid én gruppe av interessentene som sitter med minst makt. Denne gruppen er brukerne. Som bruker i en bedrift som implementerer ERP, opplever man mange omveltninger som ofte består i endrede arbeidsprosesser, nye rutiner i forhold til databruken, og svært mye nytt å lære seg for å være i stand til å utnytte det nye systemet så godt som det lar seg gjøre. Forskningen viser at dersom brukerne ikke lykkes i å henge med i denne prosessen, så vil det ha negative effek…
Design Requirements for a Patient Administered Personal Electronic Health Record
2011
Published version of a chapter in the book: Biomedical engineering, trends in electronics, communications and software. Intech, 2011 Open Access
A two-armed bandit collective for examplar based mining of frequent itemsets with applications to intrusion detection
2011
Chapter from the book: Computational Collective Intelligence. Technologies and Applications. Also available from the publisher at SpringerLink: http://dx.doi.org/10.1007/978-3-642-23935-9_7 Over the last decades, frequent itemset mining has become a major area of research, with applications including indexing and similarity search, as well as mining of data streams, web, and software bugs. Although several efficient techniques for generating frequent itemsets with a minimum support (frequency) have been proposed, the number of itemsets produced is in many cases too large for effective usage in real-life applications. Indeed, the problem of deriving frequent itemsets that are both compact an…
Managing HMI utilities for control systems
2007
Masteroppgave i informasjons- og kommunikasjonsteknologi 2007 – Høgskolen i Agder, Grimstad The supervisor of this project, Origo Engineering AS delivers complete control and automation systems for the oil industry and smelting plants. Each hardware and software package is custom‐made. A part of the functionality is implemented by scripts – small programs that are coded and run directly on a Human Machine Interface (HMI) server. This method has some challenges, which are listed and further described in this report. Those challenges increase the time and cost of producing the control and automation system. The purpose of this master thesis is to design a solution that will solve those challe…
Enterprise content management: an analysis of contemporary practice and its relationships with enterprise architecture
2012
Masteroppgave i informasjonssystemer- Universitetet i Agder, 2012 Enterprise Content Management (ECM) consists of a wide set of interrelated issues, and previous research on ECM points out that there is a lack of a common understand of the concept itself. Further, there is a lack of a holistic approach to ECM and initiatives are often individual initiatives covering sub-parts of ECM. Organizations seem to have a more functional approach to ECM. Enterprise architecture (EA) is a concept which promises to provide a holistic and long-term view of a company’s processes, systems, and technologies so that individual projects can build capabilities – not just fulfill immediate needs. EA also promi…
A novel traffic splitting policy for performance improvement in wireless mesh networks
2009
©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Article also available from publisher: http://dx.doi.org/10.1109/EW.2009.5357990 Wireless mesh networks are expected to play an important role in the next-generation wireless communication systems as it can provide wide coverage and scalable broadband Internet access services. However, as more traffic is injected into the network it may lead to throughput degra…
A system-level power saving approach for cellular networks with microcells/picocells
2011
Accepted version of an article from the book: 2011 2nd International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace & Electronic Systems Technology (Wireless VITAE). Published version available from IEEE: http://dx.doi.org/10.1109/WIRELESSVITAE.2011.5940872 Network power consumption reduction has recently become an active research topic. In this paper, we propose a novel approach to save power consumption of a three-cell microcellular network. When the traffic load in the middle cell is low, it can be switched-off and its users are covered. This is enabled by increasing the transmission power of one sector antenna in the two neighboring cells. N…
Greedy versus Dynamic Channel Aggregation Strategy in CRNs: Markov Models and Performance Evaluation
2011
Publishes version of a paper from the book: Networking 2011 Workshops. Also available f rom the publisher on SpringLink:http://dx.doi.org/10.1007/978-3-642-23041-7_3 In cognitive radio networks, channel aggregation techniques which aggregate several channels together as one channel have been proposed in many MAC protocols. In this paper, we consider elastic data traffic and spectrum adaptation for channel aggregation, and propose two new strategies named as Greedy and Dynamic respectively. The performance of channel aggregation represented by these strategies is evaluated using continuous time Markov chain models. Moreover, simulation results based on various traffic distributions are utili…