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1714 Uppsatser om Open Dynamics Engine - Sida 15 av 115
Simulation of rattan harvests in Indonesia : different harvesting pressures and the resulting patterns
The objectives of this research were to determine whether the natural rattan resources in Sulawesi, Indonesia can cope with the strongly increased harvesting pressure that has occurred over the last centuries. I was furthermore looking for patterns in the rattan population dynamics that might give a hint on how the harvesting system could be improved to ensure a maximum sustainable yield. To
answer these questions, I developed an individual-based model to analyse the dynamics of rattan growth in connection with rattan harvests by locals to identify sustainable levels of rattan harvests around villages in Sulawesi, Indonesia. Scenarios with different harvesting intensities were run to compare the change in harvest amount. For a given harvesting pressure, scenarios with a high number of harvesters and a low harvesting frequency had the same effect as scenarios with high harvesting frequencies and a low number of harvesters.
Konceptstudie av drivmodul till bandskotare med hybriddrift
BAE Systems Hägglunds has a long history of producing high performance terrain tracked vehicles (mostly for military applications), and they are now aiming at developing a tracked forwarder with similar techniques.The forwarder will be of series hybrid type where a diesel engine via a generator will power the motors (one for each drive wheel). Thanks to individually controlled motors and the gentle rubber tracks, this forwarder is calculated to have a considerably higher average speed in the terrain and to be more gentle to the soil. The forwarder with a weight of 11 metric tons and a load capacity of 15 metric tons is specified to have an average working speed of 7-10 km/h, a top speed in terrain of 15 km/h and a top speed on roads of 40 km/h.This master?s thesis aims at developing a conceptual design of the forwarder?s drive module which includes electric motor, gear unit, brake and drive wheel.To investigate if the requirements can be fulfilled a study of the dimensioning loading scenarios has been carried out. The resulting needs regarding the torque has been considered in order to determine the required gear ratios for different motor options.
Prestanda på luftfilter : En jämförelse mellan olika filter till bil
This reports goal is the give BSR AB more information that's useful towards their customers in marketing of their products.It involves tests of different air filters designed for cars and 3D-modelling of Opti-Flow systems. The three models thats being tested is SAAB (93SS), VAG (1.8T) and Volvo (S60). To every brand there are three different models. A orginal- , sport- and an open cone air filter (Opti-Flow).The results indicate that the open Opti-Flow filter has better performance compared to the other cased filters. The sport filters for SAAB and Volvo has better performance then the original filter.
Inomhuspositioneringssystem : Utvecklande av server-funktionalitet, klient-kommunikation och en grafikmotor
The projects goal was to make an already existing indoor positioning system useful forthe average smartphone user. This was achieved by creating an Android applicationwhich, along with a running server, continuously presents the user with all the currentneeded information. It uses the graphics engine andEngine to create the graphical userinterface. The application was created in the development environments Eclipse andAndroid Studio..
Utveckling av webbapplikation i ASP.net med Ajax-teknik
Arbetet har utförts på Saab Bofors Dynamics i Karlskoga och dess syfte var att undersöka om det är möjligt att använda modellbaserad prediktionsreglering, MPC, vid slutfasstyrning av en viss typ av robot. Som referensram används linjärkvadratisk reglering, LQ, eftersom denna reglermetod har undersökts tidigare och visat sig fungera bra vid slutfasstyrning, dock för en annan typ av robot. Anledningen till att man vill undersöka om det är möjligt att använda MPC är att styrlagen enkelt tar hand om begränsningar på systemet på ett direkt och intuitivt sätt.Styrlagarnas uppgift är att styra en robot i dess slutfas då det finns krav och önskemål på roboten som bör vara uppfyllda. Till exempel finns det begränsningar på styrsignalen samt önskemål om att träff ska ske i en viss träffpunkt och även med en viss träffvinkel. För att utvärdera resultaten undersöks och jämförs de två styrlagarnas prestanda och robusthet.För att kunna utvärdera styrlagarnas egenskaper och jämföra dem implementeras de båda i en befintlig detaljerad simuleringsmiljö, som har utvecklats på Saab Bofors Dynamics i Karlskoga.De prestanda och robusthetstester som har utförts uppvisar små skillnader på de två styrlagarna och slutsatsen blir därmed att det är möjligt att använda modellbaserad prediktionsreglering vid slutfasstyrning av en viss typ av robot eftersom det sedan tidigare är känt att linjärkvadratisk reglering är en bra styrlag att använda.
Olik retorik i politik? : En jämförande studie av skillnader i kommunpolitikers och riksdagspolitikers sätt att använda språket.
The purpose of this essay is to examine if there is any difference in the style of conversation between a municipal politician and a politician in parliament? In order to answer this question I have created two sub-questions that are more precise. The first question is: Are the municipal politicians more open to cooperate with politicians from other parties than the politicians from parliament? And the second question is: Is the rhetoric between the politicians in parliament different than the rhetoric between the municipal politicians?My study is a comparative case study with two different groups of politicians. With the help of a survey I have tried to examine if there are differences in the use of language in the daily work for the politicians.
Förväntningsgapets dynamik
Title: The dynamics of the Audit expectation gapIntroduction: The audit expectations gap is the difference that exists between what auditors and users of accounting information expects an independent auditor to do. Since the definition arose in 1974, much research has been done about the gap. What is relatively unexplored is how the gap changes over time within a country, and how it is affected by external events. This lack of knowledge has motivated this study.Problem: How has the audit expectation gap changed in Sweden, from the emergence of the definition until today? In which way have corporate scandals and legislative changes affected the gap?Purpose: The aim is to identify and create an understanding of how the audit expectation gap has changed in Sweden.
Konstruktion av steghållare till brandbilar
High demands are set on all equipment used in emergency service work, where small margins can be the distinguishing factor between life and death during a rescue operation. It is important that tools such as ladders quickly and easily can be dismounted from a vehicle and still satisfy the regulatory requirements for securing loads during transport. The existing solution for getting ladders down from the roof of a fire engine requires a large manual effort from the user in an ergonomically unsound posture.In this degree project a new ladder holder is developed with focus on the user to solve the ergonomic problems and at the same time create a more compact design that can be adapted to several different types of ladders. After an initial pre-study with user-interviews and measurement of forces and distances a set of requirements was formulated that came to govern the project's direction. Creative methods were used to generate concepts that improved the function and through design solutions, calculations and testing in CAD a base for manufacturing of a new product was created.The result is a completely new type of ladder holder that minimizes the user's manual effort and simplifies the securing of ladders in the holder.
Mätning av partikelmassa i avgaser från en dieselmotor
This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.
Ny huvöppningslösning för Eco-Logs skördare : Från idé till tillverkningsunderlag
This thesis has been made in cooperation with the forestry machinery producerEco-Log in Söderhamn. The focus of the thesis has been to find a cheaper wayto open the large engine hood of the company?s harvesters. The goal was tofind a solution that could increase the value for the customers by being saferand simpler to use, or, at the least, keep these values at an equal level comparedto the previous solution.In order to make it possible to CE-mark the new solution, it was importantMachinery Directive that came into effect from the beginning of 2010.To begin with, a specification of requirements was set up. Thereafter, anumber of different basic concepts was retrieved and evaluated.
ROUTERMJUKVAROR BASERADE PÅ ÖPPEN KÄLLKOD : Jämförelsestudie mellan open source routrar
En router kan i dagsläget bestå av vanlig X86/PC-hårdvara vilket medför att hårdvaran inte är lika låst som den hos vanliga hårdvaruroutrar. Vidare kan dessa X86/PC-routrar köras med öppna programvaror. Många gånger är även dessa programvaror gratis och det gör att dessa mjukvaruroutrar är billiga att införskaffa. Detta arbete har studerat ett urval av tre mjukvaruroutrar för att se ifall det fanns några skillnader mellan dem. Det som undersöktes var prestanda, funktionalitet och support.
Crowdsourcing : We are smarter than me?
Bakgrund: I och med den tilltagande teknologiska utvecklingen och globaliseringen ställs dagens företag ständigt inför nya utmaningar. För att handskas med detta måste företag arbeta för att skapa innovationer på ett sätt som de inte gjort tidigare. Det handlar om att släppa sargen ochvåga göra saker påett nytt sätt! Ett sätt för dematt göra detta är att tillämpa synsättet som kallas ?Open Innovation?, alltså att man tar hjälp av intressenter utanför företaget för att bli mer innovativa. Crowdsourcing är en del av open innovation ochinnebär bland annat attföretagtar hjälp av ?folkmassan?för att skapa nya idéereller lösa problem.
"Nej det är inte våld....det var inte med flit" - Tonåringars syn på våld i nära relation
This is a study about the relation between the Swedish school and the political system of Sweden. I wanted to see if the relation had changed since the election of 2010 as it was in that election the Sweden Democrats got over five percent of the votes and took seat in the Swedish parliament. The thing that is unique about this election is that it was really the first time a right-wing party had been elected into the Swedish parliament. Many experts argue that this is the first xenophobic party that has been elected into the Swedish parliament. This led to a problem for schools and their principals and a difficult question to answer because xenophobia is contrary to the school?s core values and the school?s democratic mission.Should the school still be open for political parties? How do schools manage to distinguish between political information and political propaganda? If parties still are welcome into the schools, which parties should be allowed? The equality ombudsman has said in a report that the schools have to comply with the principle of objectivity, which stipulates that the public sector has to be unbiased.I have chosen to make use of a qualitative method because I think the study then gets a deeper understanding of the topic.
Komprimering av eBooks enligt Open eBook Publication Structure
I denna rapport undersöks hur elektroniska böcker (eBooks) enligt standarden Open eBook Publication Structure kan komprimeras på ett effektivt sätt. Anledningen till att området valts är att en välanvänd standard för eBooks inte finns för tillfället. Standarden är relativt ny och senaste versionen av specifikationen har kommit ut under 2002. Med i utvecklingen av standarden finns många stora företag som exempelvis Adobe Systems Inc. och Palm Digital Media.
Teknologihantering inom FoU på ett högteknologiskt företag:
en fallstudie på Saab Bofors Dynamics AB
I detta examensarbete studeras teknologihanteringsfrågor inom en FoU- avdelning på ett högteknologiskt företag. Frågor kring hur teknologi bevaras och utvecklas inom två teknikområden på företaget Saab Bofors Dynamics AB undersöks. Teorier från ämnesområdena Management of Technology och Knowledge Management används för att belysa detta. Empirin i examensarbetet är insamlad via en intervjubaserad fallstudie med respondenter från teknikområde Mekanik och Elektronik. Genom intervjuerna identifieras faktorer som bevarar och utvecklar teknologi.