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455 Uppsatser om Voltage stability - Sida 22 av 31

Upprorsbekämpning eller stabiliseringsoperationer? : en jämförelse med stöd av amerikanska doktriner

Begreppen upprorsbekämpning eller counterinsurgency (COIN) ochstabiliseringsoperationer utgör ett debatterat ämne i den dagsaktuella militärteorin. Bådabegreppen förefaller användas för en och samma typ av operation. Erfarenheter från Irakoch Afghanistan har inneburit att USA utvecklat en specifik doktrin för counterinsurgency(FM 3-24) respektive stability operations (FM 3-07). Detta indikerar att det föreligger enskillnad i de två begreppen.Syftet med uppsatsen är att undersöka och definiera skillnader i begreppen COIN(upprorsbekämpning) och stabiliseringsoperationer. Medlet för att nå syftet utgörs av enjämförande studie av amerikanska doktriner.

RCC-Jordfelsskydd, mätmodul för övertonsanalys

The majority of all power cuts that affects individuals and communities are caused by earth faults on the power transmission lines at 10kV and 20kV level [1]. If these power cuts could be eliminated, less disturbances and interrupts would lead to large amounts of money savings.Swedish Neutral has developed such a protection system. When an earth fault occurs power is injected into the neutral point of the transformer. The RCC (Residual Current Compensation) protection calculates a compensation current exactly 180 degrees out of phase to the fault current. Doing this, the voltage at the fault location becomes very close to zero, without affecting the power transmission.The protection system can only compensate automatically for the fundamental frequency (50Hz), and manually for the 3rd, 5th, 7th and 9th harmonics.

Diagnos av stiktion i reglerventiler för prediktivt underhåll

This master thesis reviews advances in detection and diagnosis of static friction (stiction) in control valves. Control valves suffering from stiction results in oscillating control loops which in turn decreases both the process stability and reliability. Perstorp AB sees a necessity to automatically detect stiction in valves before the effects of the malfunctioning valves have become too severe. This thesis presents an introduction to maintenance, control loops and how stiction in valves can affect performance of control loops.A selection of methods presented in the literature are introduced and examined using normal operating data from the site in Perstorp. Common for all selected methods is their intuitive ideas and that they are based on normal operating data and minimum amount of process knowledge.

Lämplighet i familjehem : En kvalitativ studie av godkända familjehemsutredningar

The focus of this thesis is on what is considered to be a suitable foster home. For the study to be carried out an application had to be made to get access to the foster home assessments in a medium-sized municipality in Sweden. With the support of attachment theory and theory of standards different categories have been picked out and analyzed in foster home assessements that have been approved. The conclusion to what is considered to be a suitable foster home is a complex issue, as there are many factors that are interacting. Social workers seem to focus on the importance of a family?s ability to provide some kind of stability and security for a child who is considered to be placed within their home.

Elektronisk motorstyrning för ottomotorer

The combustion engines in today?s vehicles are getting more and more advanced and there are increasing demands on that the engines should operate during optimal conditions. Examples of internal combustion engine parameters which may be carefully controlled are the rate between fuel and air, that this gas mixture is homogenous enough and that it is ignited at the correct moment. Moreover, the requirements of these parameters vary depending on, among other, engine speed and load. To meet these requirements in all occurring operation conditions, it is required that many subsystems work together.

"democracy in doses"? - en studie kring demokrati och Egypten under Mubarak

AbstractWhy don't (some) regimes with formal democratic features undergo transition to democracy? Which are the internal dynamics of these regimes that can offer comprehension to this state of affairs? The main purpose of this thesis is to advance the above questions, and, on a lower level of abstraction, examine the case of Egypt. The Egyptian regime is characterized by, for instance, a multiparty-system, steps toward economic liberalization, and some level of persistent state opposition, and has been considered on the way to liberal democracy, but can still hardly be estimated as such.Thus, the thesis takes part in a theoretical framework on democratization, and further analyzes the case of Egypt on grounds of socioeconomic development, political culture, and class configuration. By this contextual approach, the thesis adduces that a low level of modernization, an incomplete democratic political culture, and a bourgeoisie supported by the state are impending significant factors. The thesis additionally remarks on the interconnection of the adopted theories, and discusses a potential need for new theoretical propositionsA secondary aim of the thesis also gives some insights into the concurrence of regime stability and the absence of democracy in, what often could be labelled, authoritarian regimes.

Or?ttvist flexibelt? En studie om hybridarbetets betydelse f?r r?ttvisa och v?lm?ende inom en organisation

The purpose of this study is to explore how hybrid work affects the experience of organizational justice and psychological well-being within an organization where working conditions differ between professional groups. Using a combination of semi-structured interviews and a quantitative survey, the study offers a nuanced understanding of how various work arrangements are perceived and interpreted by employees. The findings show that justice is not primarily about having equal conditions, but rather about how these conditions are understood and communicated within the organization. Many employees accept differences in work arrangements when they are perceived as logically justified and clearly communicated. However, when these differences lack explanation or are associated with injustices, frustration can arise even if employees understand the reasons behind them.

ICKE-TRADITIONELLT POLITISKT DELTAGANDE OCH DEMOKRATISKT F?RTROENDE HOS UNGA OCH ?LDRE MEDBORGARE I NUTID I SVERIGE.

Earlier research has shown that young and adult citizens in Europe participate in politics in different ways. While adult citizens participate in more traditional ways, non-traditional ways are more frequent among younger citizens. Moreover, issue-based participation increases when Europeans turn away from mainstream politics. Citizens in the European Union EU-15 between 15-24 ages are likely to be ?critical? citizens of a working democracy compared to people in older ages (Sloam, 2016).

Trygghet och trygghetsskapande i arbetslivet

In this paper we examine what security is to the individual and how the individual creates and maintains security in their work. The purpose of this paper is to study how the creating of security in working life is performed. We conduct six semi-structured qualitative interviews with permanent employees in the private sector and we encode our material using thematic analysis. We analyze our material and illustrate our problem area on the basis of Anthony Giddens's theory of ontological security and give examples of how security and creating of security is performed at the empirical field with previous studies in the research area. Our survey shows that security for the individual at work seems to be about having continuity in everyday life, financial stability, a permanent employment, a challenging and fun job and a family in good health and good living.

Den svenska kärnkraftspolitiken : En processpårande fallstudie av svensk kärnkraftspolitik

This study deals with Swedish nuclear-energy politics from 1980 to 2006. The purpose is to trace and to explain change and stability in three political parties? rhetoric concerning the phase-out of Swedish nuclear-energy and the Swedish government?s nuclear politics. Two hypotheses based on path dependency theory are tested to analyze if rhetoric and politics are developing in separate directions. The first hypothesis is based on the idea that earlier promises from the political parties affect what promises they can make later on.

Klimatkabinett : Komponenter och konstruktion

This report describes the construction of a climate-cabinet for testing of HV-cards (High Voltage) produced at VG Scienta. The main part of the report describes all the different components of the cabinet. The most important parts are a PID regulator from Eurotherm model 2408, a solid state contactor (SSC), a thermocouple, a finned resistor from DBK and different fans. The report even includes the connection between components by cable wiring, isolation, grounding, fuses and shaping of metal goods.As the cabinet also communicates with a computer, the report includes the solution of the data communication using the software iTools from Eurotherm. The communication part includes information about a converter that converts EIA422 to USB.The cabinet was produced at a company, called VG Scienta, in Uppsala during the spring 2010.

Utveckling av väggenomföringar av typen RIP

Examensarbetet har genomförts på ABB Components i Ludvika. ABB Components är en affärsenhet inom ABB-koncernen som tillverkar nyckelkomponenter till transformatorer, bland annat genomföringar som kan ses som en isolerande hylsa vars uppgift är att föra högspänd ström genom jordade plan.Examensarbetets syfte är att utföra en förstudie som sedan ska fungera som underlag för ABB Components utvecklingsarbete vad gäller genomföringar av typen RIP (Resin Impregnated Paper). Bakgrunden till förstudien är ökade miljökrav världen över vilket innebär en marknad där miljöfrågor får allt större inverkan. Följden av marknadens utveckling är att ABB Components har insett att de har ett glapp i produktportföljen vad gäller genomföringar av typen RIP.För att skapa det underlag som är nödvändigt för att nå målet med förstudien har metoder som intervjuer, observationer och sökningar i databaser tillämpats. Målet med förstudien har sedan uppnåtts genom att generera lösningskoncept i form av CAD-modeller.

Protection of Regional Values - A comparative study of EU and ASEAN

Regionalisation has become an increasingly important phenomenon in a globalized world. As models of regional integration, the European Union (EU) and the Association of Southeast Asian Nations (ASEAN) are two prominent examples. This thesis seeks to explore through a comparative analysis, the different mechanisms and institutions for handling breaches against fundamental values within the two regional organizations. Inter-linked with the issue of the legal-institutional framework is that of what values the mechanisms are designed to protect. The method used for the analysis is first and foremost that of public international and European law, but the thesis also attempts to give a broader picture of the issues presented.

Framtidens driftcentral : En analys av den framtida driften av ett svenskt elna?t

Active work to increase the efficiency of energy use is taking place in Sweden and throughout all of Europe. Electricity is an important part in our society?s energy system which means that the electrical grid operators and associated therewith has a central role in this work. Monitoring and controlling the electrical grids are managed from the distribution system operator?s DC, dispatch center.The aim of this report is to examine how the operations in a typical DC on the Swedish electricity distribution network will look like in five to ten years.

Ett aktivt Sverige inom ESFP - En inblick kring argumenten för ett utbrett engagemang och hög aktivitet

The ambition of this study is to examine the discussion surrounding the Swedish participation in the European security- and defence policy. By forming feasible areas of arguments the goal is to gain further comprehension in the case of Sweden. These arguments are formed in close relation to the empirical sources; With less public funding there are economic aspects of cooperation, this could also be related to Swedish the industry of defence systems; A high level of participation in the UN is a tradition in Swedish foreign policy, the European battle groups are the perfect tool to further strengthen the UN ability in conflict management and peace keeping missions; Outside the EMU Sweden could face the political margin, to retain influence a high level of activity ought to occur in the integration process; Finally, the future position of United States and NATO is not clear, Europe needs an capacity apart the US to contribute to lasting peace and stability. The arguments are close related to each other, but the main argument is to through ESDP create a tool that will strengthen UN, there is also a wide range of economic arguments related to the industry..

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