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713 Uppsatser om Dynamic simulations - Sida 30 av 48
Klibbalens gödslingseffekt på volymproduktionen i ett blandbestånd av gran och klibbal : en simulering i Heureka
A secondary and a pioneer tree species can with advantage be included in a mixed stand to increase the use of sunlight. Nitrogen-fixing plants have been shown to increase the supply of nitrogen in the soil by, for example, litter fall. This deposition acts as a biological fertilization, which may be used by non-fixing plants. Alder is a nitrogen-fixing, pioneer tree species that loses its nitrogen-rich leaves late in the autumn. The aim of this study was to examine the effect on the total volume of production, when different proportions of nitrogen-fixing Alder were part of spruce stands.
Robotiserad produktionsanpassad magnetmontering för vågkraftverk
This thesis work includes studies and simulation how magnetization of the translator in a linear generator for wave power can be automated. The translator is the moving component in the generator that is "dressed" with permanent magnets. The translator is magnetized with rectangle-shaped permanent magnets that are today's strongest permanent magnet type of neodymium-iron-boron (NdFeB).Eight equivalent metal sheets are mounted around the translator. The plates have milled tracks where 106 permanent magnets per sheet are mounted. Today the assembling of the magnets is done by hand, which is a very tedious and time-consuming work. This project presents investigations about the automation of the translator magnetization theoretically and simulation results are preformed in ABB's robot simulation software RobotStudio. Even robot-held tool was designed that enables the robot to be able to magnetize the translator in a simple manner. The investment cost is roughly 1.5 million SEK. With an economic life-time of five years, the investment costs are estimated to 24000 SEK / month. According to the calculations, this project is very motivated to implement, as it provides savings up to 17 000 SEK per translator which is 10.2 million SEK assuming that the robot cell is operating at full speed the whole year.According to this thesis work the result is a 4x9 meter cell with two industrial robots of the type ABB IRB6650S.The cycle time to magnetize one translator was calculated to about 10 hours.This prototype of project can possibly be implemented in a full-scale production line and performed according to the calculations and simulations presented in the report. Further work is suggested to improve the tool.Lyssna .
Price adjustment and vacancies on theStockholm market ? Estimation of rent levelsdue to office-allocations
The Stockholm office market segment have for a long time been considered a safe havenwhen it comes to withstand negative turmoil in the form of rental compression due toeconomic fluctuation, especially in the CBD demographic. Recently however, a large numberof banks and institutions, amounting to some 200000 square meters, have decided to relocateto more peripheral locations with the aim of cost reductions on rent. This mass exodus isstudied with focus on rental dynamics as the result of increased vacancies. Other variables arestock changes and employment. The method is econometric combined with an interviewseries.
Population and management models for the Swedish wild boar (Sus scrofa)
The wild boar Sus scrofa population in Sweden has increased rapidly in the last decades which has led to conflicts among stakeholders, for example due to crop damages in agriculture. Thus, there is an urgent need of quantified goals and effective strategies for wild boar management. To develop such strategies, knowledge on population dynamics is fundamental. In this study a deterministic matrix model was used to estimate population growth, based on previously published data. The exponential growth rate for a wild boar population was calculated to 1.48.
The Disney Cliché : Relationsdynamik i Disneys animerade filmer från 2000-talet ur ett genusperspektiv
Disney is one of the largest media companies in the world. They have been critizied for portrayting men, women and love relationships with stereotypical behaviours and attributes. This may lead to negative effects on childrens and adolescents perception of reality. The purpose of this study was to investigate how Disney portrays the dynamic between the characters within the love relationship in their movies launched in the 21st century. This study has examined four movies released in the 21st century containing a love relationship between a man and a woman.
ADS och Matlab för optimering av pre-distortion av effektförstärkare
This master?s thesis deals with integrating simulations using Agilents Electronic Design Automation tool ADS with customized Matlab scripts, for solving complex analog and digital radio architectures. In particular, it addresses predistortion, realized in the digital domain, of power amplifiers, modeled in the analog domain. The former is implemented in Matlab while the latter is implemented in ADS. Two versions of integrating the two systems have been tested: 1) Iterative approach on sample basis and 2) Scheduled batch solution by matrix inversion.
Development of Liquid Cooling for PCs
In recent years, existing solutions for cooling personal computer CPUs have been supplemented by a new product category, factory sealed water cooling loops. These systems, consisting of a water block with an integrated pump, a fan and a radiator, perform well compared to the air cooling solutions but are less effective than larger, custom-built water cooling systems.This project aims to explore the most important aspects of a factory sealed system and to identify possible cost-effective enhancements of the performance.The most significant differences between the different groups of water cooling loops are the block design and the pumping power. The performance of both categories is also largely dependent on the fan power, but increasing fan power has a large negative impact on the noise level.Both radiator size and fan model choice appear, in tests, to be relatively unimportant, presuming that the noise level is kept constant. The position and direction of the fan, however, has significant impact on both the temperature and the sound level.Water blocks can be designed in several different ways, both regarding the heatsink design and the flow direction. In simulation, flow with the inlet centered above the heatsink result in considerably lower pressure drop and slightly higher temperatures than flow through the block, for heatsinks with fin arrays.Creating a competitive product in this product segment certainly seems possible, as there are performance-increasing changes to be made that seemingly has little impact on the production cost.
Nu vågar jag vara chef: utvärdering av Norrbottens läns landstings chefsutbildning ur ett NPM-perspektiv
The public sector has through the years been exposed to a rather radical alteration. The aim with this alteration has been to make the public sector more effective. It?s a dynamic society that Norrbottens läns landsting (NLL) operates in today and it is therefore of great importance that the managers get a solid foundation to rely on, since they have a central role in the ambition for efficiency. Another reason to educating the managers is that NLL can secure the future pension losses.
Innovativa Metoder f?r Brandgasventilation : En Studie av Tillufts?ppning i Takniv?
Denna studie unders?ker en alternativ utformning av termisk brandgasventilation. Utformningen bygger p? att ers?tta tillufts?ppningar i markplan med r?kgasluckor i tak med hj?lp av brandteknisk installation i form av r?kgardin. Syftet med arbetet har varit att g?ra en j?mf?relse mellan denna hypotetiska utformning och traditionell brandgasventilation f?r att kunna utv?rdera om samma effekt kan uppn?s med de olika metoderna.
Något gammalt, något nytt, något lånat? : Viral marknadsföring ur ett dynamiskt perspektiv
Viral marknadsföring har på senare tid blivit allt mer uppmärksammat då många har insett fördelar med att kommunicera sitt varumärke via sociala medier. Idag kan ett budskap spridas oerhört snabbt via olika kommunikationskanaler och därmed skapa en "snackis", vilket naturligtvis är ett önskvärt läge för företagen. Det innebär dock inte att denna spridning är lätt att uppnå. För att ett innehåll ska bli viralt måste det helt enkelt förtjänas. Termen "viral marknadsföring" och därmed dess användning kan upplevas som tvetydig då några anser att det är möjligt att i förväg utforma en viral kampanj medan andra menar att det aldrig i förväg går att veta om någonting kommer att bli viralt eller ej.Idag flyter även vår fysiska yta samman med den digitala vilket skapar en dynamisk miljö som företag är verksamma inom och som vidare leder till att det krävs ett nytt förhållningssätt för att kunna möta denna dynamik.
Sticka ut är silver, passa in är guld: - och fyra andra medaljer i det svenska moderacet
The fashion market is highly dynamic, and characterized complexity, abstract phenomena and creativity. Further, differences between factors such as gender, countries and social classes pose increasing challenges to fashion companies and researchers active within this area. In light of these facts, the value of creating tools that help companies and professionals active within this industry becomes evident. Much research has been focused on creating a more thorough understanding of its underlying logics and its main drivers from a business perspective, whereas knowledge regarding fashion consumers and what drives their behavior are more limited. Through this study, insights about the Swedish fashion market and its consumers are generated.
Mobile Ajax
This report describes a master thesis performed at SICS (Swedish Institute of Computer Science) and KTH (The Royal Institute of Technology) in Stockholm.Ajax stands for "Asynchronous JavaScript and XML" and it's not a programming language, but a suite of technologies used to develop web applications with more interactivity than the traditional web pages.Ajax applications can be adapted for mobile and constrained devices. This has been called Mobile Ajax. While the technique is the same, Mobile Ajax generally is considered to be a special case of Ajax, because it deals with problems specific to the mobile market.The purpose of this thesis has been to examine which possibilities and disadvantages has the Mobile Ajax from developers and users perspective. In addition we compare Mobile Ajax with Java Micro Edition (Java ME) and Flash Lite.This has been done through literature studies and development of a databased chat client (MAIM -Mobile Ajax Instant Messenger). The application sends and receives direct messages in real time between differently mobile devices.
Realisering av en modulär skogsmaskin - En skalmodell
Wood for commercial use is harvested from forests using forest machines like harvesters which folds, branches and cuts trees and forwarders which transports logs to a landing area for further transport to a processing facility. Future forest machines have to be much gentler to the machine operators and forest soil than today's machines. Hence new machine solutions must be developed and tested. A practical way is to develop a physical scale model which can be used as a test-bed to incorporate different types of solutions for suspensions, cabin damping, tires and tracks, crane and overall architecture. The aim of this project was to develop such a 1:5 scale model of a forest machine, named as ?Skogbil.A scaling strategy was employed to arrive at important scale dimensions and specifications ofSkogbil which would be comparable to the full scale model.
Marknadsföring inom idrottsföreningar : -En studie om ishockey idrottsAB i Stockholm
Purpose: The purpose of this studie is to map and describe the marketing strategies of professional sport organizations and examine in what extent and how they apply the 7P?s of the Marketing mix.Method: We have used an abductive approach in this study. The research was conducted as a two case study, the studied objects are AIK Ishockey AB and Djurgården Hockey AB. A qualitative method has been used. The empirical content was collected by triangulation in form of interviews, telephone interviews, studie of webpages and participating observation.
Planering, förutsättningar ocheffekter av implementering avsolceller i stadsutvecklingsprojekt.
Today, buildings utilize 40 % of the total energy consumption. New energyrestrictions and directives have entered the construction industry. Photovoltaic is asustainable, clean and quiet solution that integrates well in the urban environment buthave not yet reached a breakthrough on the Swedish market. The conditions for solarenergy production are often set in the early planning stages where they rarely arebeing prioritized.This master of engineering project focuses on identifying problems regardingimplementation of photovoltaic in city development projects and giving suggestions topossible improvements in the planning- and construction process. It also givesrecommendations on how the conditions for energy production can be optimized inthe early zoning stage.By conducting simulations with PVsystV5.21, on three ongoing city developmentprojects in Umeå, Malmö and Stockholm and by carry out and analyzing interviewswith city planners, constructors and architects, some conclusions have been made.Several improvements, both politically, with changes in the subsidization systemand/or instatement of a new law with feed-in tariffs, and within the solar- andconstruction industry itself, with better communication between different parts of theprocess as well as better use of experience, can be made.