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517 Uppsatser om Linear feature extraction - Sida 17 av 35

Hedge Fund Style Analysis, Is an Index-Based Approach Viable?

This thesis aims to open the Pandora?s Box of hedge fund styles through an index-based style analysis. This information asymmetry is due to both less strict disclosure requirements and inherent nature of hedge funds. We employ a multiple unconditional linear regression model wherein 23 Swedish hedge funds are regressed on 10 style indices. In addition to the increased interest in hedge funds and their performance drivers, our unique approach with regressing return on return motivates this study.

Robotstyrning med metoden Sliding Mode Control

The task in this thesis is the steering of one of Saab Bofors Dynamics robots using Sliding Mode Control, a method they never used before. The robot constitutes a system which in addition to perturbations and uncertainties due to modeling imprecision, hold the difficulty of being highly time variant. In order to be able to keep required performance with uncertainties and modeling imprecision present, the use of robust control methods like Sliding Mode Control is necessary. SMC is based on the states of the system being forced to stay on or in the direct vicinity of a hyper plane in the state space which is chosen in a way that gives the system dynamics desired properties. Other advantages with sliding mode are reduced order dynamics on the switching surface and total insensitivity to some uncertainties and perturbations.

Stråkröjning och skogsbränsleuttag i unga granbestånd jämfört med konventionella metoder : Två fältstudier vid Asa försökspark

Den här uppsatsen grundar sig på två fältstudier i nyutlagda demonstrationsförsök på Asa försökspark som ska användas i utbildningssyfte. Studie 1 bestod av försöksytor i ett 13 år gammalt bestånd som röjts till samma röjningsförband men med tre skilda metoder; motormanuell selektiv röjning, maskinell stråkröjning och som en kombination av bägge metoderna. Syftet var att beskriva det nuvarande tillståndet, simulera fram prognoser för beståndsutvecklingen och beräkna dess ekonomiska konsekvenser fram till och med första gallring och jämföra de olika metoderna med varandra. Studie 2 bestod av försöksytor i ett 23 år gammalt eftersatt bestånd där fyra olika åtgärder testades; ingen röjning innan gallring, underröjning i samband med gallring, sen röjning och skogsbränsleuttag. Syftet var även här att jämföra de olika metoderna med varandra genom beskrivning av det nuvarande tillståndet, göra prognoser för beståndsutvecklingen och beräkna dess ekonomiska konsekvenser vid första gallring och i den här studien även fram till och med den andra gallringen.

Rörelsens generativa kraft : Den kroppsliga rörelsen som varseblivningens möjlighetsbetingelse

The standard model concerning the relationship between perception and motility is linear and one-way. It depicts the flow between the two as moving from sensation to perception to representation to computation, and finally, to motility and action. According to this model, animal being is basically a bundle of reflexes. But what can correctly be considered a bundle of reflexes from a natural science point of view, doesn't necessarily have to be true. This conception does not take into consideration the more complex interactions between motility and perception that constitutes, or generates, animal and human beings.

Nåbarhetstestning i en baneditor : En undersökning i hur nåbarhetstester kan implementeras i en baneditor samt funktionens potential i att ersätta manuell testning

Denna studie undersöker om det är möjligt att införa nåbarhetstestning i en baneditor. Testets syfte är att ersätta manuell testing, det vill säga att bankonstruktören inte ska behöva spela igenom banan för att säkerställa att denne kommer kunna nå alla nåbara positioner.För att kunna utföra studien skapas en enkel baneditor som testplattform. Vidare utförs en jämförande studie av flera alternativa algoritmer för att fastställa vilken som är mest passande för nåbarhetstestning i en baneditor.Resultatet från den jämförande studien visade att A* (A star) var den mest passande algoritmen för funktionen. Huruvida automatisk testning kan ersätta manuell testning är diskutabelt, men resultatet pekar på en ökad effektivitet i tid när det kommer till banbygge..

Solenergi på Nya Karolinska Solna

In today?s society climate change has grown to one of the largest global issues. To reduce emissions of greenhouse gases, large changes of the energy system are required. An increasingly popular solution is investments in local production of renewable energy resources like wind, solar or geothermal power. The following report examines the possibility for implementing a solar power plant on the new hospital Nya Karolinska Solna. Two different technologies for extraction of solar energy has been studied, solar thermal collectors  to meet the need of heating and solar cells to satisfy the need for electricity linked to operating the hospital building.

"Hellre en bra story än en dålig" : En kvalitativ studie om framställningen av berättandet i tv-spel

Within the literature and film sciences there are clear models of storytelling and methods of creating a good story. In the game industry it's more difficult because the games are often non-linear, and games are a less established medium than the other two. With this study our purpose was to examine game developers and methods they used when creating a videogame, with focus on storytelling. Four interviews were made with representatives from four different videogame companies in Sweden. The information from the interviews was put in relation to theories regarding the structure of videogames and an established model for creating videogames.

För säkerhets skull : En säkerhetsteoretisk analys av debatten om kristna samkönade äktenskaps vara eller icke vara

The Swedish government ratified on May 1 2009 an amendment of marital law, resulting in same-sex marriage becoming legalized. With the rights of the Christian Swedish state church to officiate weddings originating from the same law, the church was thereby faced with two options: Either officially include same-sex couples in the Christian concept of holy matrimony and keep the right to officiate weddings; or give up the right to officiate weddings altogether. An official decision to accept the terms was reached on October 22 2009, but not without being preceded by an agitated medial debate.This research attempts to analyze the arguments of the debate in three stages: In the first stage the arguments are categorized according to their respective ideological standpoint. In the second stage these categories are examined from post-modern, social constructivist and socialization theory perspectives. Based on this, the third stage sees the arguments analyzed from a viewpoint based in the Copenhagen school concept of securization.The research concludes that the debate does not only simply feature two sides with differences of opinion; but rather that the arguments of the two opposing sides are founded in a common view of the other side as a fundamental threat to ones conception of a sound society..

Torkning av flis med restvärme : Metoder för att sänka återledningstemperaturen

The purpose of this study has been to evaluate whether a Low temperature bio-mass dryer could be integrated with the local district heating system in Malå. The aim is to increase the thermal efficiency of the cogeneration plant in Malå, by lowering the temperature of the cooling medium. Another benefit that comes from this is improved combustion efficiency at the power plant, since drying the fuel causes an Increase of the heating value.Simulations has been made in Excel, and with use of linear regression, to find out if it is profitable. Data for this purpose has been supplied by the power company Skellefteåkraft and furthermore SMHI.The result of the Calculations shows that a very efficient bio-mass dryer is needed, if yield of investments should be made possible. An Investment of 4,27 Mkr, in a dryer, could at a such criterium return 60000 kr/year, if the price of the biomass is 190kr/MWh.

Att skriva sig språkligt medveten eller bli språkligt medveten för att erövra skriftspråket : Språklig medvetenhet hos sexåringar i montessoriskola och i förskoleklass

In Montessori pre-schools early reading and writing is an important feature. By tracing sandpaper letters with their fingers and voicing the sound simultaneously the children connect phonemes to graphemes and normally learn to write between the ages of four and five. 24 sixyear old children who attended Montessori pre-school and 26 six-year old children who had not attended Montessori school were assessed with a test assessing their linguistic awareness.The result showed that the Montessori children were more linguistically aware than the children who hadn?t received any literacy training. The scores of the Montessori children were highest on phonological awareness.

GR?NSKONTROLL INIFR?N: Hur Sverigedemokraterna villkorar svenskhet och medborgarskap genom homonationalism, k?nsnormer och v?lf?rd

This thesis analyzes how homonationalist and heteroactivist discourses are reproduced in the Sweden Democrats political communication between 2022 and 2025. Drawing on critical discourse analysis, the study examines a selection of key texts, including two Almedalen speeches by the party leader Jimmie ?kesson (2022, 2024), an extraction from a report produced by the party, and a parliamentary motion. The study is theoretically grounded in scholarship on homonationalism, heteroaktivism and populist radical right nationalism. It investigates how gender, sexuality and religion are discursively mobilized to define national belonging and construct boundaries between ?us? and ?the other?.

Trångt om saligheten - En studie av intresseorganisationers arbete med politisk påverkan i det post-korporativa Sverige

The relationship between the government and organised interest in Sweden has changed. Formally considered as a good example of a corporatist state the country during the last 15 years or so experienced a more pluralistic system. This thesis is a qualitative study which discusses how interest groups seek to influence decision makers and policy thru lobbying and public opinion. It also examines how interest groups work with advertising and public relations in a changed climate of mass media. The main method of gathering material has been done thru interviews of representatives of different interest groups.The results of the study paint a picture where the interviewed organizations experience a vast competition in communication and information.

KR?PTA : spår och ärrbildningar hos Johannes Heldén, Ingrid Storholmen och Anna Hallberg

Trough the analyses of three young contemporary Swedish and Norwegian poets, who all in one way or another work with the language as material, I will circulate around the term language materialism. Each poet has his or her specific distinctive feature wich makes them three completely different poets. But they are all challenging the borders of literature and even the grammatical laws of language. Apart from the analyses I sketch an historical line between the predecessors of the experiments with the poetic language in the past, starting with Mallarmé, and the experiments of today. My essay will in conclusion discuss the language poetry in a wider philosophical point of view, connected to Derrida and Wittgenstein.The first analysis introduces the author and artist Johannes Heldén through his debute poetry collection Burner.

En författarcociteringsanalys av forskningsfältet socialpsykologi

The aim of this thesis is to use the bibliometric method author cocitation analysis (ACA) and investigate the cognitive structure in a research field, which is called the intellectual base. The research field in this investigation is social psychology. The main question is: what is the nature of the cognitive structure, which contains of the intellectual base. This question is divided in two sub questions: ? Which are the most prominent authors in the research field? ? Which sub areas, based on groups of the most cocited authors in the research field, can be identified?An investigation with ACA is used to describe the general experience of consensus of later authors in a research field.

Sveriges befolkning: P? randen till utd?ende eller evig tillv?xt?

Nyligen kom ett pressmeddelande fr?n Statiska Centralbyr?n (SCB) att Sverige har den l?gs ta siffran p? antal barn per kvinna i modern tid, 1.43. D?rf?r ?r det relevant att spekulera kring hur Sveriges framtida befolkningsm?ngd kan se ut, b?de p? kort och l?ng sikt. I detta arbete har begrepp unders?kts som populationsstorlek, fruktsamhetstal, f?rs?rjningskvot och befolkningspyramid, och hur dessa ter sig ?ver tid. Fyra scenarier analyserades: of?r?ndrad fruktsamhet, fortsatt nedg?ng, ?verg?ng till ?kning samt en cyklisk utveckling med b?de minskningar och ?kningar.

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