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1345 Uppsatser om Flow simulation - Sida 60 av 90
Flygburen laserskanning kopplat till skördarmätning för datainsamling till operativ planering :
The requirements for operative planning activities are increasing. The forest industry wants to gain better control over wood flow. A felling that is more market adjusted is desirable. However, this causes problems in the operative planning process because of the data collection methods used today. Data about timber assortments and data about the distribution of the tree diameter, etc., are often lacking.
Airborne laser scanning is used to a greater extent than before for estimation of forest variables and should perhaps be used to the same extent in operative planning activities as well.
Vilka hinder förekommer utmed gångstråk och hur kan de åtgärdas : samt hur kommunerna använt resultatet från tillgänglighetsinventeringar och hur de upplevt stödet från Vägverket Region Mälardalen
To be able to compete on the market environmental Management System has become an important part of operations work. However, many companies still haven?t implemented an environmental management systems due to lack of time and the high costs. One of the companies with this problem is Falu Bildemontering. Their goal is to accredited according to the ISO 14 001 certificate.
Framtagning av en rörväxlaretill sopsugsystem
The main goal of this project was to develop some sort of a diverter for pipestransporting waste in a vacuum system. This unit was supposed to be both cheap andeasy to serve/exchange worn out parts. With a limited space to install the pipeexchanger, the challenge was to keep it as compact as possible without constructingbends with to small radius or to sharp angles as this would wear out the system a lotfaster than planned. The system was also supposed to be able to handle clothes andscrubs from hospitals. Having too much sharp edges or angles would tear the clothesapart.
Ammoniumåterkoppling på Himmerfjärdsverket ? utvärdering genom försök och simuleringar
Avloppsreningsverk står inför uppgiften att rena inkommande vatten för att möta lagstiftade gränsvärden till en så låg kostnad som möjligt. Att syresätta biologiska reningsprocesser är kostsamt eftersom luftningsanordningen förbrukar mycket energi. Ungefär en femtedel av Himmerfjärdsverkets totala elenergiförbrukning går till luftning av biologiska processer.För att öka Himmerfjärdsverkets energieffektivitet startades under 2010 experiment med olika strategier för luftflödesstyrning. En av verkets nitrifikationsbassänger byggdes då om för att möjliggöra zonvis reglering av syrehalten.Syftet med denna studie var att utvärdera reglering med ammoniumåterkoppling och syrehaltsprofil för styrning av Himmerfjärdsverkets nitrifikationsprocess. Utvärderingen baserades på reningsresultat och energiförbrukning.Med nuvarande reglerstrategi varieras luftningen genom återkoppling från syrehalten i den andra av sex zoner i varje luftad bassäng.
Företags motiv till finansiering med realränteobligationer
The long-term external financing of a corporation is satisfied through the bond market where issues of index-linked bonds, which are discussed in this thesis, is one alternative. (Finnerty&Emery 2001) An index- linked bond is a debt instrument where the investor is guaranteed the principal and premium amount in real terms. As the bonds cash flows are indexed to the inflation this implies that the issuer of an index-linked bond assumes an inflation risk. Purpose: The purpose of this thesis is to describe and examine corporate motives for choosing index-linked bonds as way of financing their business. Realization: Primary data was collected through interviews with corporate issuers of non-swapped index-linked bonds.
Meningsfulla turistupplevelser: en studie av erfarenheter berättade av människor i "den kreativa klassen"
Arbetets problemformulering tar fasta på att Florida (2002) beskriver vad den kreativa klassen är, hur den arbetar, hur den underhåller sig och hur den skapar nya kreativa mötesplatser. Han talar dock inte så mycket om hur den kreativa klassen reser och turistar. Denna studie kan bidra med kunskap till personer som verkar inom turismbranschen och vill uppfylla de önskningar som människor ur den kreativa klassen har. Syftet med detta arbete är att skapa förståelse för vad människor som jag bedömer tillhör den så kallade kreativa klassen upplever som meningsfullt i det resande som kan betraktas som turism. För att uppfylla syftet genomfördes en kvalitativ studie där sex personer som passade in på Floridas (Ibid.) definition av den kreativa klassen intervjuades.
Stämmer verkligen resultatet? Earnings management och bolagsstyrning i svenska börsföretag
Syfte:Att på den svenska marknaden undersöka effekten av resultatmanipulering, efter införandet av Svensk kod för bolagsstyrning. Metod:Kvantitativ datainsamling använd's för att utföra regressioner del's för beräkning av EM, del's för identifiering av signifikanta förklaringsvariabler. Informationen hämta's bland annat från årsredovisningar, SIS Ägarservice och Datastream. Studien har en deduktiv ansat's. Teoretiska perspektiv:Ett antal bolagsstyrningsteorier har behandlat's rörande agentprincipalförhållanden, institutionellt ägande samt separation av ägande och kontroll.
Får vi se ? datakvalité. Effektivisering av supportprocessen hos Tunga Maskiner AB
Inadequate data quality has a negative effect for organizations, however utilization of modern technology and data analysis may shape new values for organizations. Our research has found that the quality of information in field reports for error reporting varies significantly. In many cases, the information in the field reports are deficient in such way that the field report need additional information from the sender, thus risking prolonging lead times in the error reporting process. More efficient use of information has become possible with today?s technology.
Nollföljdsmodellering av transformator-Beräkningar av följdproblem vid ökad kablifiering på mellanspänningsnivå
Historically transformers with system earth equipment have been modeled as open circuits in zero sequence. This approximation has been satisfying, but lately it has been discovered that equipment on one side of the transformer have responded to faults that occurred at the other side. Most of these problems took place when the majority of the system on the secondary side of the transformer contained cables. These findings have led to questioning whether or not the former model of the transformer in zero sequence is correct. This report investigates if it is necessary to represent the transformer in zero sequence in another way than it is usually done today.
Framgångsfaktorer med Business Intelligence- verktyget Qlikview inom offentlig verksamhet : Tillämpas teorin för att nå målen?
Introduction:Corporate limits becoming more diffuse due to the globalization taking place and requirements for analytical strategies are becoming more fundamental parts of organizations. Business Intelligence systems are hot and not without reason, today's world is spinning faster and with a flow of information that is constantly increasing Business Intelligence promises to introduce a support that will render a better decision-making, something that everyone wants.Problem Discussion:The local government business has today demands from the Swedish School-inspection to analyze and create adequate target images to the school and students meet curriculum goals and guidelines. Therefore, local government activities has increasingly begun to implement Business Intelligence tools, with the purpose to facilitate strategic and operational decisions were the result plays an increasing role in today's society.Purpose:This study evaluates how the analysis tool Qlikview fulfills the function of monitoring and controlling the improved student achievement in public schools.Method:The evaluation has been conducted qualitative interviews with staffs that have leadership positions in each municipality and management and possess a deep knowledge of the analysis tool and its processes.Conclusion:The evaluation has shown positive effects on the monitoring and control of student performance through better control of school operations..
Euthanasi : avlivning av häst
The term euthanasia is derived from the Greek terms eu meaning good and thanatos meaning death, "good death".
The penetrating captive bolt is an effective method of euthanasia, when use of drugs is inappropriate. The horse becomes immediately unconscious and falls to the ground. First after the blood is emptied from the body the horse is dead.
The use of injectable euthanasia agents is a rapid and reliable method of performing euthanasia. The aim is to stop the flow of oxygenated blood to vital organs and tissues.
The muscle relaxants may be used either in combination wih or following an anaesthetic dose of barbiturate, their use use as a sole agent is totally inhumane.
Lantbruket som energiproducent : tekniska, ekonomiska och miljömässiga förutsättningar för fjärrvärmeproduktion med lokalt skogsbränsle
A third party access to district heating networks has been proposed in Sweden, to increase the competition
on the district heating market. Such third party access could create opportunities for the agricultural sector
as an energy producer. This study describes the technical, economical and environmental prerequisites for a farmer cluster to build and run a heating plant, fueled with local wood fuel.
The heating plant in the described scenario is 8 MW and will supply a village of 1000 houses, and is fueled with wood chips exclusively. Supplying a heating plant with fuel puts high demands on the logistics, since there need to be a continuous flow of fuel. In the scenario, wood residues from felling and thinning is stored in stacks in the forest, and a few times a year chipped and transported to a storage area at the heating plant.
In the study, an estimation of the profitability has been made by estimating the cost of the investment,
personnel, operating and maintenance costs and costs for the fuel and ash handling.
Simulering av elektriska förluster i en vindkraftpark : Utveckling av programvaran Wind Farm ElectricSystem Calculator (WFESC)
When planning new wind farms, the cost for the internal electrical grid is estimated to account for 8-9 % of the total investment cost. On top of that, the cost for accumulated reduced income over several years (due to electrical losses), has to be added. The economic lifespan is relatively long (about 20 years) which means that an error in the loss calculation could lead to a bad decision basis. The accumulated reduced incomes due to electrical losses can be higher than the initial investment cost for the internal electrical grid.Today, Statkraft Sweden is using a template number when estimating the electrical losses in a wind farm. The actual losses are probably lower than the template number which could lead to an unnecessary high loss cost when planning a new wind farm.The aim of this M.Sc.
Lönsamheten i vindkraft : en studie om den förväntade lönsamheten i landsbaserad vindkraft
This thesis analyzes the expected profitability in land based wind power plants. The expected profitability is calculated on the basis of a wind power project in Vartofta, Falköping. The information required to calculate the expected outcome is then concentrated to this project, which is in this thesis called project Näs. In project Näs they plan to build three wind power plants, with each an effect of 2 MWh. These wind power plants are very capital intensive investments with a long and uncertain payback time.
Produktionsvåtmarker mot övergödning
In ambition to produce more and better harvests, artificial fertilizers are used to produce a better growth of crops in the agriculture landscape. This contributes to leakage of nutrients. Our forests also exhibit a leakage of nutrients. Air pollution contributes to more nutrients. High precipitation with high water flows as a consequence seems currently to occur more frequently in the county of Halland.