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1989 Uppsatser om Medium Voltage Network - Sida 9 av 133

Funktionsanalys och åtgärdsförslag avkommunikationslösning hos driftleverantör

No infrastructures today are growing faster then communication network. The requirement of being able to communicate in a fast and qualified environment to a low cost increases in line with the development and competition. Itera Networks is no exception when it comes to rapidly developing new and better network solutions for themselves and for their customers. With these requirements in mind their needs for an analysis of the existing communication solution becomes very obvious. This project contains such an analysis in which various studies of the existing network environment have been made.

Mät och loggningsutrustning för spänningstransienter

To be able to measure high-surge voltages and transients with short rise times youneed measuring instruments with a high sampling frequency and large Bandwidth.These surges and transients occur primarily at lightning but can also occur at forexample at connecting errors at an electrical switch-gear. This report describes thework with finding two solutions for measuring and log data from these surges andtransients. One temporary solution where a measurement program has beendeveloped. A second solution where different company solutions have been analyzedto decide which fits best. For these measurement solutions two solutions for bringingdown the voltage has been used.

Reklamens värde: En kompletterande syn på advertising- och brand equity.

At several occasions, an important question has been brought forward within the world of advertising and media. This is the question of whether or not ?good? advertising should be encouraged by the media. The question has an origin in a belief that such advertising can create values not only for the advertiser, but also for the medium. Although this question has arisen in business media, and although many managers work from the assumption that such relationship exists, there are none or little proof that it actually does.

Konsten att styra konst: - styrning av kreativa projekt inom en nätverksorganisation

This paper describes a case study of the largest film production ever conducted in Scandinavia. The study aims at explaining the complex relationships in the network structure in which the project took place. Coordination of creative projects carried out in a network context, includes handling conflicting interest and contradictions. Creativity needs space and freedom while projects need structure and coordination, whereby controlling these projects becomes complex. Adding to the complexity, does the loose form of organization that the network structure represents, without any long term structure.

Att göra nya val - om nätverkets delaktighet i ungdomars väg ut ur ett missbruk

 The aim of this study was to examine how young people, who have been treated for their misuse and/or to learn to handle a parent's misuse, portrayed the network's implication in their wishes about improving their lives, to make new choices. The network included members of nuclear family, relatives, important persons at school/work and friends. The ?professional network? (therapists and social workers) also became a part in the young people's life during a period. The main issues of this study concerned differences in their experiences of the young persons´ network relationships in before, during and after completed treatment.

Kriminaljournalister och Flashback : En intervjustudie om pressetik i ett nytt medium

The aim of our study was to examine Swedish crime reporters? approach to the social medium Flashback. Our main focus was the crime reporters? use of the medium Flashback, and attitude towards their own use of media ethics in relation to the medium Flashback.Flashback as a medium is not obliged to any media ethics and lacks a legally accountable publisher. In the search for information about committed crimes people tends to visit Flashback for the information that the traditional media cannot offer.

HAVECA-modellen - En metod för att fortlöpande säkra ett internt nätverk mot tredjepart

This thesis will address a problem concerning availability of information systems at an enterprise within the financial sector and its external suppliers, so called trusted third party. The information system resides on the internal network of the enterprise and must be available to both employees of the enterprise and the trusted third party simultaneously. This contradicts the company policy which disallows third parties access to the internal network. The HAVECA-model introduced in this thesis provides a framework of methods, each solving a sub problem identified in the model. The identified methods are hardening, verification, control and assurance, together supplying a method for continuously securing the internal network against a trusted third party.

Det perfekta jaget : Om ungdomar, normer och stress på sociala medier

This study aims to find out what relationship high school students have to social networks at the Internet. This has been done by focusing on norms/standards that adolescents can feel under stress to achieve, through stressing themselves by social networks in a way that is consistent with the norms. The empirical data has been gathered by questionnaires which have been answered by adolescents in randomly selected schools and classes in a medium size Swedish town, Karlskrona. The result showed that all of the participating adolescents have user accounts on a social network. Furthermore it also emerged that a lot of the adolescents thought that norms existed that should be followed in a social network about how to stress oneself.

vindkraftens påverkan på elkvaliten

This thesis concerns how the power quality in the grid is affected by the connection of wind power plants. As things are at present, Fortum Distribution AB has a number of wind turbines and wind parks connected to the own grid. As the pressure on building and connecting additional wind power is increasing, so is also the interest of how the already existing wind power generation affects the power quality in the nearby distribution grids. The study is performed by direction of Fortum Distribution AB and is limited to the 10 kV/40 kV-grid in Bohuslän, Sweden. The methods for calculation of power quality are compared to the results of a number of measurements.

Kartläggning av begränsande faktorer vid fellokalisering med pulsekometod på mellanspänningskablar

I samband med att mellanspänningsnätet kablifieras ökar också kraven vad gäller fellokalisering. För att hålla avbrottstiderna i nätet korta är effektiv felsökning erforderlig. Detta arbete syftar till att kartlägga och redogöra för begränsande faktorer som finns vid fellokalisering med fokus på pulsekometoden. Uppdraget utförs tillsammans med Vattenfall Eldistribution AB.Det har uppdagats problem gällande fellokalisering på mellanspänningskablar med pulsekometoden. Ett flertal faktorer bidrar till denna problematik.

Minivindkraftverks inverkan på lågspänningsnät

Micro-power wind energy convertors have recently increased in popularity. The reasons for this are among other things the increasing cost of electric energy and enviromental concern.In this thesis the connection of these micro-power wind energy convertors to the utility network is discussed. Electric standards for the connection of small production units is presented. Finally some calculations and measurements of electric quality are also presented. The utility network used in the calculations is part of Halmstad Energi och Miljö network..

Quality of Service i IP-nätverk

The original promise behind the Internet Protocol was to deliver data from a sender to the receiver using a best-effort approach. This means that the protocol makes no guarantees except that it will try to deliver the data to the destination. If some problem occurs the packet may be discarded by the network without any notice. No guarantees are made regarding the time it takes to deliver the data, the rate at which data will be delivered or if data is delivered in the same order it was sent. The best-effort approach is arguably the reason behind the success of the Internet Protocol and is what makes IP scalable to networks the size of the Internet.

Hur skapas ett nytt medium genom att kombinera musik med en serieroman?

Jag har skapat en kort serieroman med tillhörande cd-skiva där bilderna, texten och musiken formar en helhet vilken blir som störst om alla element tas del av samtidigt. Min frågeställning har varit: hur skapas ett nytt medium genom att kombinera musik med en serieroman? Syftet med det här arbetet har varit att skapa ett medium som på bästa sätt drar nytta av musikens och serieromanens styrkor och att kombinera dem på ett sätt som inte gjorts förut. Jag kommer i den här uppsatsen förklara hur jag kom på den här idén, vad jag sedan skapade för produkt och hur min arbetsprocess såg ut. Slutligen resonerar jag kring vad jag kunde gjort annorlunda och hur mitt arbete kan vidareutvecklas..

Software keystroke logging : Automatisering av skydd mot software keystroke logging

This piece of work develops a solution that automates protection against software keystroke loggers. Keystroke loggers can be used illegally to register a user's keystrokes and in that way acquire sensitive information. The solution was tested on two different networks and the efficiency was measured. The network represents an enterprise network that uses the operating system Windows along with the directory service Active Directory. A script was developed to solve the automation matter.

Design comparison between HiperLAN/2 and IEEE802.11a services

This paper is a study and comparison between the two Wireless LAN (WLAN) standards HiperLAN/2 and IEEE 802.11a. WLANs are used instead or together with ordinary LANs to increase mobility in for example an office. HiperLAN/2 is an European standard developed by ETSI and the IEEEs standard is American. A WLAN-card consists roughly of a Medium Access Control (MAC), Physichal layer (PHY) and an antenna. The antenna is the same for the different standards.

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