Search results for "communication systems"
showing 10 items of 120 documents
Systemutviklingsrutiner : "motivasjon og forutsetning for videreføring av systemutviklingsrutiner" : en casestudie av en lokal avdeling i et større k…
2013
Masteroppgave i informasjonssystemer – Universitetet i Agder 2013 Bruken av metode i systemutvikling har lenge vært sett på som et viktig element for å kunne gjennomføre prosjekter raskt, strukturert, effektivt og forutsigbart. Noe som derimot har kommet frem rundt dette, er at nesten ingen bruker metoden helt slik den er tenkt og man ender opp med å gjøre tilpassninger. Videre forskning på hvorfor metoder fungerer eller ikke, er dermed problematisk ettersom alle bruker metodene forskjellig. Det jeg derfor har sett nærmere på, er i stedet rutiner og praksis. Studien har tatt for seg to rutiner i en lokal avdeling i et større konsulentselskap, med fokus på testrutine og rutine for smidig utv…
From common operational picture to common situational understanding: An analysis based on practitioner perspectives
2021
Abstract The concepts of Situational Awareness (SA) and Common Operational Picture (COP) are closely related and well-acknowledged to be crucial factors for effective emergency management. In multi-agency operations, such as extreme weather events, the involved first responders manage the event with different mandates, objectives, and tools which can make it challenging to build a COP. Effective collaboration requires a common situational understanding, based on knowledge about each other’s responsibilities and tasks, mutual respect and trust, as well as common communication tools for emergency communication and information sharing. This paper argues that the COP serves as a basis for decid…
Experimental investigation on PLC signal crossing of power transformers
2014
In this work the use of PLC in MV-LV networks is investigated, by means of experimental tests in the case of a two-ways MV/LV communication between two secondary substations. The two substations are connected by a MV overhead power line. Moreover each substation has a by-pass connection at MV bus-bars and a MV/LV power transformer. A ST7580 transceiver is used to inject the communication signal. The transceiver is embedded in a new interface device developed by the authors. In the paper the communication issues are introduced and some experimental tests are presented and discussed. Such tests have been carried out in the presence of voltage net, i.e. 24 kV, with the aim to verify the possib…
Streaming for vehicular users via elastic proxy buffer management
2004
In this article we refer to the market of vehicular networks, where groups of customers located in the same public vehicle (e.g., a train or bus) connect to a terrestrial network through a wireless/satellite backbone link. Elastic buffering is a proxy management technique devised to decouple the multimedia information retrieval rate on the network backbone from the playout streaming rate at the user terminal. It has been shown in the past that the application of elastic buffering mechanisms in terrestrial networks brings significant advantages in terms of network effectiveness. We show that elastic buffering is an extremely effective means to reduce, or even eliminate, streaming service out…
Understanding the dynamics in e-Participation initiatives: Looking through the genre and stakeholder lenses
2011
Accepted version of an article published in the journal: Government Information Quarterly. Also available from the publisher at: http//dx.doi.org/10.1016/j.giq.2010.10.005 Conventionally, e-Participation initiatives are considered to be successful only if users use these services. While the growing body of e-Participation literature has listed and studied challenges and barriers to achieving this end, conceptual clarity on why such projects are considered as failures is yet to be achieved. We argue that this is due to the inadequate understanding of the complex stakeholder dynamics of an e-Participation project. In this paper, we seek to address this knowledge gap by proposing that using St…
The support for different democracy models by the use of a web-based discussionboard
2004
Published version of a chapter published in Lecture Notes in Computer Science, 3183, 23-26. Also available from the publisher at: http://dx.doi.org/10.1007/978-3-540-30078-6_4 Different initiatives are initiated to utilize ICT to maintain and develop democracy. Democracy models are developed to explain differences between different democracies. This paper reports from a case study where a web-based discussion board is developed and implemented. The findings indicate that politicians and citizens add support to different democracy models by their contributions to the web-based discussion board. Contributions from the citizens add stronger support for the neo-republican model where as politic…
Implementing unified communication : from the perspective of end-users - a case study in Statoil
2011
Masteroppgave i informasjonssystemer- Universitetet i Agder 2011 The number of communication technologies in use have increased dramatically following the advent of modern information technology, requiring users to learn how to use ever more devices and systems and to choose the appropriate solution for every communication need. This adds complexity to communication and by extension also to getting work done in general. Unified Communication attempts to make communication and work easier by reducing the number of devices and systems without necessarily reducing the number of technologies/channels available to the users. The purpose of Unified Communication is thus to gather as many channels…
A Non-WSSUS Mobile-to-Mobile Channel Model Assuming Velocity Variations of the Mobile Stations
2017
This paper aims to characterize the effects that the velocity variations of the mobile stations (MSs) produce on the correlation properties of non-stationary time-frequency (TF) dispersive mobile- to-mobile (M2M) fading channels. Toward that end, we propose a novel geometrical model for non-wide-sense stationary uncorrelated scattering (non-WSSUS) M2M channels that incorporates such variations following a plane wave propagation approach. Capitalizing on the mathematical simplicity of this approach, we derive a general expression for the four-dimensional (4D) TF correlation function (TFCF) of the proposed channel model. From this expression, we analyze the influence of the MSs' acceleration#…
Impact of e-government on transaction cost and FDI inflows: A proposed conceptual framework
2011
Published version of an article in International Journal of Business and Management, 6(11), 285-296. Also available from the publisher at http://dx.doi.org/10.5539/ijbm.v6n11p285 Although vast normative e-government literature supports the assertion that implementation of e-government reduces transaction cost and promotes Foreign Direct Investment; empirical evidence to support this thesis is limited. Even more, there is limited attempt when studying this phenomenon to integrate e-government literature with other literatures in which major constructs of interest are rooted. This article contributes to reducing this gap by establishing a conceptual framework that integrates e-government lite…
Turning a new “page”: ways to decrease the number of pages after hours without compromising patient care
2020
Pages to house staff after hours, especially overnight, lead to interrupted sleep and fatigue the next day. Although some pages are urgent, others may not need an immediate response. In this study we aimed to identify unwarranted pages and to establish ways to reduce them.Over 2 months, all pages to the Department of Pediatric Urology at the Hospital for Sick Children in Toronto, Canada, during call hours were documented, including the assessment of the responding physicians of their medical necessity. After analyzing the reasons for inappropriate pages, we took several steps to try to reduce them without impairing patient care. One year later, pages were tracked again to evaluate the effic…