Dissertations / Theses on the topic 'Linjär'
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Katardzic, Edin. "Visualisering av Linjära Avbildningar i Linjär Algebra." Thesis, Linköping University, Department of Science and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-53163.
Full textDetta examensarbete har genomförts på Campus Norrköping, Linköpings Universitet. Arbetet är en del av ett samarbete mellan Linköpings Universitet, Kungliga Tekniska Högskolan och Math.se. Målet med samarbetet är att skapa och underhålla en hemsida för webbstöd i kursen Linjär Algebra. Genom åren har det upptäckts att det finns en problematik i många studenters inlärning av kursens teori. Detta beror på att det är svårt att undervisa något som berör fler än två dimensioner på en tvådimensionell tavla eller papper.
Examensarbetets syfte var att utveckla grunden för en produkt som hjälper till att öka förståelsen hos studenter som läser linjär algebra. Produkten skulle på ett interaktivt sätt visualisera på datorskärmen de moment i kursen som kan vara svåra att undervisa i ett klassrum. Vidare skulle produkten både lära ut och testa studenters kunskap.
Programmet skulle finnas och startas från hemsidan för kursens webbstöd så att det kan startas parallellt med att studenter löser uppgifterna på sidan. Det var också krav på att programmet skulle fungera på alla stora operativsystem och webbläsare. Framförallt var det viktigt att produkten skulle vara lättanvänd och fungera pedagogiskt.
Resultatet av examensarbetet är nio applikationer, en för varje moment som har tillämpats, som via datorgrafik underlättar undervisningen genom pedagogiskt förklarande och uppgifter. Programmen startas direkt på hemsidan via Java Web Start.
Norén, Björn. "Dataoptimering via linjär programmering : Tillämpning av linjär programmering för kostoptimering." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-39727.
Full textLinear Programming (LP) is an effective optimization tool that has a central part in minimizing or maximizing. LP can also be used on a small scale for individual problems such as choosing what we should eat. This presupposes that LP is effective enough to be able to solve diet-based problem formulations and thus the goal is to investigate its potential to solve that type of problem. This study explores this by optimizing a mixing problem where the data used in the project is nutritional data retrieved from a food database. An initial study was done to create a vision of which components are most desirable in the project. Subsequently, requirements specifications were created that concretized the necessary functionality. The most important components identified for the project were partly how to set up a correct LP problem with necessary side conditions, and the second factor was how to use a dynamic size of side conditions. Two solutions were chosen to add all the side conditions: Iteration and Recursion. The use of iteration was decided at near the end of the project as the recursion proved to be inefficient for the task. Time measurements were performed to examine which method was most effective and the iteration was a clear winner over the recursion. This is because the call stack quickly becomes overloaded in Python during recursion and thus the iteration is a better solution for the project. The results show that there is potential within LP to solve diet-based problem formulations.
Rydefalk, Cecilia, and Erik Bäckström. "Linjär modellering av gummibussning." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210785.
Full textThe purpose of this report is to provide a method of reproducing the stiffness of a set of rubber bushings, in three translational and three rotational directions, based on measurements carried out on them, using a single linear FEM element. The model should be simple and useful for use in, for example, multi-body simulation, where you look at the behavior of an entire system. In order to save computation time, simplifications are made; in this case, a linear simplification of a material that in reality shows highly non-linear behavior. Only the stiffness is modeled and the damping is ignored. The report presents the element itself, the form in which the result is given, and the content based on the measurements. It also discusses what constraints the method has because of, among other things, material properties of rubber that can not be reproduced in a linear system. It is apparent from our analysis that the amplitude dependence of rubber will be a critical factor for how well our model works, and that the data we have is insufficient to make reliable extrapolation beyond the limits of the measurement range.
Berzins, Louise, and Josefine Sohlman. "Linjär blandningsoptimering för skrotanvändning i aluminiumproduktion." Thesis, KTH, Hållbar produktionsutveckling (ML), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254223.
Full textThe aim with this project was to increase the amount of used scrap in the remelt of aluminum alloys by using linear programming, which was successfully done. A status analysis about the average use and characteristics of aluminum has been described, as well as a mapping of the todays industry within the company. This is followed by a theoretical chapter containing references from previous work solved with linear programming, and a description of LP including the mathematical model. The attempt to solve this problem is carefully shown in the forthcoming chapters together with the different approaches that were used. The results are presented with analysis of each optimization, followed by a discussion and a conclusion including future recommendations. The model is used with two different objective functions to get perspective, volume to maximize the amount of used scrap and price to increase use of high valued alloys in order to decrease capital accumulation within the non-used scrap. The remelt process of today consumes about 30 % of the total scrap produced during one year. This model shows that it is possible, by having 17 out of 72 recipes, to use 90 % of all scrap. One optimization for a single recipe also proved that it is possible to produce an alloy consisting of basically scrap.
Börjesson, Maria, and Jenny Kromnow. "Åtgärdsprogram : en cirkulär eller linjär process?" Thesis, Högskolan Kristianstad, Sektionen för Lärarutbildning, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-6677.
Full textSchmekel, Daniel. "Linjär algebrans tenikers användningsområden inom kombinatorik." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254715.
Full textMathematics contains many hard problems. In this paper we discuss how some of these hard problems can be solved with techniques from other math fields than the problems own discipline. First we solve some combinatorial problems using the knowledge that a maximum amount of vectors in a linearly independent set over a subset of a vector space F^n over a field F is n. Then we discuss and explain Z.Dvir's famous proof regarding Kakeya sets over finite fields. He is able to establish a lower bound of the size of Kakeya sets using polynomials.
Al-Chalabi, Mona. "Gymnasieelevers matematiska svårigheter att lösa linjära ekvationer och linjära ekvationssystem : En litteraturöversikt." Thesis, Linköpings universitet, Matematik och tillämpad matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150625.
Full textMany students of secondary school find it difficult to understand algebra, specifically linear equations and systems of linear equations, which prevents their further learning in both mathematics and other subjects. Teacher must therefore have a clear idea of what these difficulties are in order to assist their students in understanding and learning this area in algebra. The study examines the findings of the research literature as to what these difficulties are. Proven difficulties that have been illustrated with examples of students´ solutions are: deficiencies in their algebraic prerequisites, procedural knowledge and conceptual knowledge (especially about similarities, constants and variables), lack of knowledge of the algebraic syntax, and incorrect handling of the operations used to solve equations and systems of equations, for example how to handle negative coefficients and constants and use the substitution method.
Öijar, Jansson Emma, and Jansson Agnes Öijar. "Minimering av driftstopp med linjär multipel regressionsanalys." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298247.
Full textAngermund, Sebastian. "Algebra och linjär algebra tillämpat i kombinatorik." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210834.
Full textLinder, Åsa, and Johanna Sjöberg. "Webb-TV och linjär TV: Tittarvanor och tilllsammanstittande." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146046.
Full textOur study is about viewing habits and social viewing on web-TV and linear TV amongst students, at the Royal Institute of Technology, around the age of 18-30 years. We researched three groups, those who only uses linear TV (whom we named Linjär), those who only uses web-TV (Webb) and those who uses both (Kombo). We did two comparisons of viewing habits and social viewing, one between Linjär and Kombo and one between Webb and Kombo. The purpose of the study was to investigate the differences in viewing habits and social viewing between the different groups. The results were achieved by a questionnaire study where the participants answered a number of questions about their habits of viewing web-TV and linear TV. We found a number of differences between the groups in the result, one of them being that Kombo does not watch linear TV as late as Linjär. Furthermore, Kombo is watching linear TV more alone than Linjär. Kombo does not watch web-TV as often as Webb and Kombo does not watch web-TV together with friends and family like Webb.
Greko, Lars. "Uppdragstaktik och icke-linjär inriktning möter linjära ledningsprinciper : En studie av konsekvens/inkonsekvens inom svensk militär ledning." Thesis, Försvarshögskolan, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-10052.
Full textÖman, Daniel, and Olof Blomkvist. "Icke-linjär 3D finit elementanalys av genomstansade armerade betongplattor." Thesis, KTH, Betongbyggnad, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37094.
Full textPetersson, Johan. "Beräkning av baslinje för Performance Contracting med linjär regression." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-95376.
Full textEnergy developing projects is today more relevant than ever. In order to implement such large projects as the entire real estate, and while taking into consideration the law about public business, the model EPC, Energy Performance Contracting, evolved. In collaboration with Siemens Building Technologies AB, I have looked at how to ensure a certain level of savings which are carried out. This guaranteed savings are calculated against a baseline, which is an estimate of how the energy usage would have looked like with today's conditions unless changes have been made. The model with regression is accurate and helps to identify abnormal usage patterns
Björkquist, Tova. "Olydnadens Agens : Konst Politik Pedagogik – en icke-linjär studie." Thesis, Konstfack, IBIS - Institutionen för bild- och slöjdpedagogik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-6514.
Full textVärn, Theo. "Visualisering av rotationer samt kvadratiska former i Linjär Algebra." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-64419.
Full textGerhardsson, Pär. "Operationsdesign vid nationella operationer : Linjär kausalitet vid dynamisk krigföring?" Thesis, Försvarshögskolan, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-5850.
Full textÖster, Michael. "Stability and Mobility of Localized and Extended Excitations in Nonlinear Schrödinger Models." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8091.
Full textGuldbrandzén, Erling, and Manthan Shah. "Mechanical design of transverse flux linear generator for wave power : Mekanisk konstruktion av linjär transversalflödesgenerator för vågkraft." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190166.
Full textThe Transverse flux generator type topology is to be used to generate electricity for wave energy purposes. The main advantage of using this concept is low losses and higher values of force density can be achieved at low speeds. With the relatively slow speed of the waves this machine outperforms the standard permanent magnet synchronous machines. This thesis is related to the mechanical aspects of the generator where it was checked whether a mechanically sustainable structure could be created at a low cost to generate electricity from the energy of the waves. Maximum deformation was checked for the stator and translator using finite element method (FEM) and analytically checked by beam theory and was within the acceptable range. Thermal expansion of the mechanical parts in the generator is sufficiently low. Adhesives 3M DP270 and vinyl ester were suggested for their properties. Vinyl ester is planned to be further tested on different parts of stator and translator.Attachment of the bearings using HFRHS on the stator has been suggested for further evaluation. A shape of insulating material has been suggested for the translator. The dimensions on the protrusions of the iron stacks are important since they affect the overall efficiency of the system. A number of different combinations were tried to check the stress values and total deformation in the part. The results were further evaluated and most appropriate combination was selected. A clamping concept was devised for both the stator and translator parts and concepts for both the stator and translator have been simulated by FEM tools and other aspects have been evaluated using analytical calculations.Guideways have been suggested for the linear motion of the translator. A concept to attach the stator and the translator is also suggested in the thesis. A CAD model has been developed for further evaluation of parts.
Zhang, Anda. "Analys av bostadsrättspriset i Stockholms innerstad : En multipel linjär regression." Thesis, KTH, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-167646.
Full textI denna studie används en multipel linjär regression för att analysera ett antal variablers inverkan på bostadsrättspriset i Stockholms innerstad. Resultatet kan användas till att prediktera och betrakta procentuella förändringar för slutpriset av en bostadsrätt i Stockholms innerstad. Fem olika modeller konstruerades varefter de analyserades och jämfördes. Modellerna konstrueras med hjälp av data för alla sålda bostadsrätter i Stockholms innerstad mellan åren 2010 - 2014 från fastighetsförmedlingen Erik Olsson. Resultatet av studien visar bland annat att boarean har störst positiv påverkan på slutpriset. Bland stadsdelarna i innerstaden är Östermalm stadsdelen som bidrar mest till ett dyrare bostadsrättspris. Samtliga modeller hade förklaringsgrader på 89%-94%.
Wängström, Theodor, and Kia Fard. "Aktivering av hjälpande beteende i digitala medier och linjär TV." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-244232.
Full textHammar, Martin. "Körstrategi för det kommande energisystemet Falun-Borlänge : Driftanalys och framtagande av optimala styrkurvor." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-32829.
Full textDistrict heating is a heating alternative that deserves attention as a possible key contributor in the fulfilment of European Union energy and climate goals, the 20-20-20 goals, to reduce carbondioxide emissions, improve the overall energy efficiency and increase the share of renewable energy. This is because district heating allows industrial excess heat recovery and also because it presents the possibility to use otherwise unused resources such as waste and forest residue as fuel. The cities Falun and Borlänge in Dalarna, Sweden, has since 1984 and 1969 operational district heating systems, which are owned and driven by the municipal corporations: Falu Energi & Vatten (Falu Energy & Water) and Borlänge Energi (Borlänge Energy). When the two companies decided to collaborate and connect their freshwater systems the decision was made to also connect the two district heating systems. The soon-to-be district heating system Falun-Borlänge will be supplied by cogeneration plants in Borlänge with waste as fuel and in Falun biofuels, but also with excess heat from the Stora Enso Kvarnsveden paper mill and the steel plant SSAB in Borlänge.Today the two systems has different control strategies which has to become one in order to coordinate the systems. To make this happen the two companies founded the subsidiary company Grundledningen HB which is to be responsible for the coordination. This thesis has been conducted with cooperation with Grundledningen HB with the aim to develop a new control strategy for the soon to be joint energy system Falun-Borlänge.The new control strategy was developed by calculating the optimum supply temperature for different outdoor temperatures. This was determined by an operational analysis, by making the problem into a linear programming problem and thereafter account for flow restrictions and temperature requirements in the system.The result concludes three different optimal control strategies, depending on the ability to control the distribution network. The validity of the control strategies has been established through a sensitivity analysis. The developed control curves are in certain positions higher than the ones currently used as a consequence of the coordination of the system.
Isaksson, Jonas, and haben bemnet. "Insamling av data från en linjär bildsensor med bearbetning i LabVIEW." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1579.
Full textInsamling av data med hjälp av en linjär bildsensor, I/0 modul och LabVIEW i realtid för analys.Uppgiften innefattar val av skanner och I/O modul samt utvärdering av den insampladeinformationen. I rapporten beskrivs det också hur olika enheter synkroniseras med varandra.
This report deals about how to collect data with a linear image sensor, I/0 modul and LabVIEW in real time for further analyses. The report declares the choices of scanner and I/O modul for the insamples of data information. This rapport also tells about how to synchronize the equipments.
Ekman, Gordon. "Linjär självhämning av lyftpelare : En jämförelse mellan olika bromstyper och friktionsmaterial." Thesis, Växjö University, School of Technology and Design, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1870.
Full textSyftet med den här rapporten är att utveckla och testa en hållbar, säker, tyst och kostnadseffektiv bromslösning som X2 Technology AB kan implementera i sina lyftpelare.
Lyftpelaren har idag dubbla bromslösning medför en merkostnad som är onödigt kostsam och därigenom ofördelaktig ur konkurrens och vinstperspektiv.
De dubbla bromsarna tillför inget mervärde för kunden, därför är det viktigt att minimera kostnaderna som detta innefattar.
I denna rapport har olika friktionsmaterial testats med hänseende till missljud, lasthållning och mikroglidning.
Det resultat som uppnåddes var ett par alternativa friktionsmaterial och annorlunda yta på bromsen som visade sig fungera väl ihop med dessa material. Även ett ändringsförslag till en alternativ broms som tidigare testats togs fram. Detta nya utförande har inte hunnits testats ännu.
Roos, Henning. "Utveckling av verktyg för linjär analys av JAS 39 Gripens styrsystem." Thesis, Linköpings universitet, Reglerteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-118078.
Full textDue to the relatively simple and extensive theory behind linear systems compared to non-linear theory,it is often desirable to perform a linearization of a non-linear system in order to make use of this theory.On some non-linear systems it is difficult or not even possible to perform an analytical linearization.This may be due to the fact that the complexity of the system is high or that the analytical expressionof the system is unavailable. Numerical analysis may be the solution to this problem. In this master thesis forward and central derivative approximation is used in order to approximate the derivatives needed to perform a numerical linearization of a non-linear system. This thesis also deals with what happens when low fidelity in-data is used when performing a linearization,what happens when integers and binary signals are part of a system that is linearized, and what happens whenperforming a linearization of a system that uses different sampling times for different parts of the system. Finally numerical bilinearization of a system on bilinear from is examined and a comparison betweenanalytical linearization and bilinearization is made.
Berglund, André, and Erik Hellgren. "Bolåneräntor i Sverige : Enanalys av individuella räntor med multipel linjär regression." Thesis, KTH, Matematisk statistik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146740.
Full textThis report investigates how a number of customer-specific factors affect individual interest rates for Swedish home mortgages. The method used is multiple linear regression with transformations of the explanatory variables. Transformations that we employ are log-linear, linear-log, log-log and piecewise linear. The dataset consists of approximately 7000 Swedish home mortgages with floating interest rates from July 2013. Loan to value ratio, loan size and the the choice of mortgage lender are identified as the most important factors that influence individual interest rates. We find that large loans in combination with low loan to value ratio tend to lead to lower interest rates. There are also significant differences in interest rates depending on the mortgage lender.
Storm, Mårten, and Mattias Lind. "Spelvolym i innebandyns smålagsspel : en kvantitativ studie i icke-linjär pedagogik." Thesis, Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:gih:diva-5594.
Full textAim Very little is known about how different types of training influence technical development in floorball. The purpose of this study was to investigate how volume of play, shots, and shots on goal, were affected in different types of small-sided games (SSG). The research questions this paper sought to answer were: in floorball, does the volume of play differ between the game formats: two versus two (2v2), 3v3, 4v4, and 5v5? In floorball, does the number of shots differ between the game formats: 2v2, 3v3, 4v4, and 5v5? In floorball, does the number of shots on goal differ between the game formats: 2v2, 3v3, 4v4, and 5v5? Method Two amateur teams were recruited for the study. One team was a women’s team of 15 players participating, with an average age of 38, with 2-15 years’ experience of organized floorballpractice. The other team was a boys’ team of 21 players participating, aged 12-13 and 5-6 years’experience of organized floorball practice. The data were collected during one of each team’sregular floorball practice sessions, where video captured the four different SSGs. One team was filmed ten times for one minute for each SSG and the other team was filmed ten times in three SSGs and nine times in one. The videos were analysed for volume of play, as well as registering shots and shots on goal. The compiled data was then statistically analysed in order to see if there were any significant difference between the game formats. Results Group A showed a significant difference in volume of play between all SSGs, where the highest volume of play was found in 2v2, and the rest with a lower volume of play in ascending order. As for shots and shots on goal, group A showed significantly more shots and shots on goal in 2v2, 3v3, and 4v4 compared to 5v5, but no significance was found between the SSGs. Group B showed a similar pattern in volume of play as found in group A, but no significant difference between 4v4 and 5v5. The amount of shots were significantly higher in 2v2, 3v3, and 4v4 compared to 5v5. However, for shots on goal group B only showed 2v2 producing significantly more shots than 5v5. Conclusion The study indicates that reducing the number ofplayers is aneffective wayto increase technical actions. Therefore, SSGs seems to be better for skill acquisition in games than the large game of 5v5. However, more research is needed in this field for further understanding of the uses of SSG:s in floorball.
Gullstrand, Mattias, and Robin Sandström. "Multipel linjär regression för hyressättning av bostäder som uthyres i andrahand." Thesis, KTH, Matematisk statistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229057.
Full textAn apartment owner who is not closely monitoring the rental market may have no idea what to set as a price if he or she ever were to sublet their apartment. In addition to having a rent-controlled market, Stockholm has also experienced a price hike in apartment prices the last few years. In this study, a linear model for estimating the rental price of an apartment in Stockholm has been developed by using a dataset of signed rental contracts in Stockholm. For anyone wishing to rent out their apartment this study can offer a price interval supported by a mathematical model. In this study, it is shown that a cross-validated linear model could explain more than 2/3s of the variation of the rental price of an apartment in Stockholm by four simple parameters, m2, room count, distance from central Stockholm and rental contract length. This study lays the ground work for anyone wishing to apply the same concept in other geographical areas or complete the dataset for even more precision.
Stoorhöök, Li, and Sara Artursson. "Hur påverkar avrundningar tillförlitligheten hos parameterskattningar i en linjär blandad modell?" Thesis, Uppsala universitet, Statistiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-279039.
Full textLudvigsson, Henrik. ""Eleverna försvinner i mängden" : En jämförande studie av interaktiv och linjär dokumentär." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-10726.
Full textAxelsson, Rebecca, and Rebecca Källsbo. "Analys av variabler som påverkar lönsamheten i gymbranschen med multipel linjär regression." Thesis, KTH, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172816.
Full textThis thesis combines mathematical statistics with industrial economics and management to examine the profitability of the fitness industry in Sweden. The study was conducted with a dozen fitness businesses and the data mainly consisted of the companies’ annual reports from 2009 to 2014. The operating margin is the measure for profitability used in the calculations. A survey was conducted with multiple linear regressions to identify explanatory variables that affect the profitability and the extent of influence by these variables. The results of the regression analysis are discussed from economic aspects. This thesis contributes with strategic conclusions to the development of a business model for new and existing fitness businesses that aim to maximize profitability. The thesis can also be used as a tool in strategic development and give insight to how companies should approach the market. It includes an analysis of the competitive forces and external factors that may affect companies in the industry. Risk factors and growth opportunities are taken into account in the discussion about how companies can finance their operations. The regression analysis concludes that it is primarily the factors that affect the companies’ revenues and costs that have a significant impact on profitability. However, the results of the thesis also indicate that qualitative factors have a major impact on profitability.
Ristenvik, Emma, and Lina Vikström. "Fonologisk intervention baserad på en icke-linjär fonologisk analys : En multipel fallstudie." Thesis, Linköpings universitet, Institutionen för klinisk och experimentell medicin, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-137800.
Full textBarn som har fonologiska svårigheter kommer ofta till en logoped för utredning och eventuell intervention. Den logopediska utredningen och efterföljande intervention kan utgå från olika teoretiska ramverk, varav icke-linjär fonologi är ett. Föreliggande studie var en multipel fallstudie med tre deltagare i åldern 4;3-4;4 år. Deltagarna hade fått diagnosen fonologisk språkstörning men ännu inte erhållit någon behandling. Före interventionsstart gjordes tre baslinjemätningar med det svenska fonologiska bedömningsmaterialet LINköpingUnderSökningen (LINUS). Interventionen gavs sedan en gång i veckan i fem veckor och avslutades med två uppföljande mätningar. Den första uppföljande mätningen skedde i samband med sista behandlingstillfället och den andra uppföljande mätningen skedde efter tre veckor. Vårdnadshavarna till barnen fick vid sista uppföljande mätningen även fylla i en utvärdering om hur de upplevde behandlingen. Korrekt producerade segment och kluster i orden i LINUS beräknades och jämfördes med barnens produktion vid baslinjemätningarna. Percentage Phonems Correct och Reliable Change Index för deltagarnas samtliga bedömningar beräknades för att ta reda på om eventuell förändring var reliabel. De segment och kluster som utgjorde mål för interventionen förbättrades mer än andra segment och kluster. Kluster förbättrades i högre grad än enskilda segment. RCI-index var >1,96 för samtliga deltagare, vilket innebär att förbättringen var reliabel. Baserat på vårdnadshavarnas utvärdering framkom det att behandlingen varit värdefull för dem, att de hörde en förbättring hos barnen samt att de upplevde att barnen fann behandlingen rolig. Studien visar att en intervention baserad på en icke-linjär fonologisk analys är effektiv och med fördel kan användas kliniskt.
Lundström, Ina. "Gymnasiebehörighet och sociala faktorer med linjär regression / The Influence of Social Factors on School Performance using the Linear Regression Model." Thesis, KTH, Matematisk statistik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105757.
Full textWallgren, Hanna. "Slitsade stålreglar för fönstermontage : En jämförande analys av karmreglar." Thesis, KTH, Byggnadsteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196535.
Full textSahlin, Jakob. "Line Loss Prediction Model Design at Svenska kraftnät : Line Loss Prediction Based on Regression Analysis on Line Loss Rates and Optimisation Modelling on Nordic Exchange Flows." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193675.
Full textPrognoser och estimering av stamnätsförluster är en central del i den dagliga driften av det svenska kraftsystemet. Den här uppsatsen har därför syftat till att utveckla en simuleringsmodell som ger en timvisprognos över morgondagens förluster i varje elområde (SE1-SE4). Detta verktyg är senare tänkt att precisera den dagliga upphandlingen av förluster och därmed minska kostnaden kopplad till osäkra prognoser. Den utvecklade modellen bygger på en regressionsanalys av tidigare uppmätta förluster och uppskattade transmissionsflöden mellan de närliggande elområdena beräknad med linjär programmering. Simulerignar för 2015 visar att, det med föhrhållandesvis enkla antaganden och uppskattningar av indata, går att precisera förlusterna med uppemot 27% jämfört med dagens prognos och därmed minska kostnaderna i liknande omfattning. Studien visar också att förbättringspotentialen är stor och rekommende-rar fortsatta studier utifrån en Neurala Nätverk modell.
Jovanovic, Filip, and Paul Singh. "Analys av faktorer som påverkar bränsleförbrukningen i en personbil : Med multipel linjär regression." Thesis, KTH, Matematisk statistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229059.
Full textThis thesis in applied mathematics and industrial economics investigates different factors affecting the fuel consumption in passenger cars. This is done by performing a multiple linear regression using the software R. Further, an analysis of the car industry is done covering the internal and external factors affecting the car manufacturers, in order to present an optimal strategy regarding RnD for car manufacturers having relatively low revenues. This analysis is based on Porter's five forces framework and a PEST-analysis. The data used for the regression has been gathered by the U.S. Environmental Protection Agency (EPA) and consists of 1245 passenger cars which was then processed in order to apply the regression. The results of the regression analysis performed indicated that it is possible to explain approximately 80% of the fuel consumption in passenger cars. More precisely, the number of cylinders, type of transmission and cylinder deactivation-system had the biggest impact on the fuel consumption. Furthermore the economic analysis of the industry revealed highly influencing external factors such as regulations and changing consumer preferences together with competition from other actors within the industry being the biggest threat. The main conclusion from this thesis is that car manufacturers having relatively small revenues should implement cylinder deactivation systems and abandon the turbo-downsizing trend within the industry. Furthermore manual gearboxes should be abandoned in order to reduce the fuel consumption and manufacturing costs while increase the comfort for the consumer.
Wikland, Love, and Theodor Ohlsson. "Förändring i Aktievärderingmed Avseende på Nyckeltal : En Multipel Linjär Regressionsanalys på Finanskrisen 2008." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230679.
Full textFinancial ratios are used to compare the performance on individual stocks, in order to accurately value them. The price of a stock will however fluctuate over time and ever so often suffer from dizzying peaks or devastating slumps, as did during the financial crisis of 2008. This report seeks to answer whether investors valued stocks differently, with regards to key ratios, before and after the financial crisis, by using multiple linear regression analysis. The S&P 500 companies classified as "Industrials" are chosen to form the basis of this analysis. The results cannot with statistical significance attest to there being a difference in stock valuation using key ratios in a linear regression setting.
Holmberg, Otto, and Joel Rosing. "Fysiska miljöns påverkan på bilinnehav : Aggregerad linjär modellering av rumsliga faktorer i Göteborg." Thesis, KTH, Urbana och regionala studier, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298538.
Full textVar vi bor och hur vår närmiljö ser ut och fungerar påverkar hur vi rör oss. Genom att ändra förutsättningarna i närområdet förefaller det naturligt att valet av bilinnehav skulle påverkas. Denna studie undersöker sambandet mellan den fysiska miljön och bilinnehav i fallstudieområdet Göteborg.Studien tar avstamp i tidigare linjära aggregerade modeller och undersöker variansen av bilinnehav per hushåll på basområdesnivå kvantitativt genom linjär regressionsanalys. Studien ämnar till att belysa hur de faktorer som kan styras genom kommunal styrning (faktorer som kan regleras genom detaljplanering eller exempelvis påverkas genom kommunal investering i gatumark) kan förklara variansen av bilinnehav. Frågeställningar kring Göteborgs Stads arbetssätt och värderingar av de oberoende fysiska variablerna i modellen som lyfts undersöks genom en enkätstudie och kortare intervjuserie i tandem med de statistiskt påvisade förhållandena för att se hur dessa två synsätt skiljer sig åt. I byggandet av modellen över hur stadens nätverk, struktur och bostadsutbud potentiellt påverkar privat bilinnehav per person valdes fyra huvudsakliga fysiska variabelteman: parkering (exempelvis cykel och bil), nätverk och densitet (exempelvis bebyggelsetäthet, trafiknätverksdensitet eller avstånd), bostäder (exempelvis utformning, upplåtelseform och medelstorlek) och kollektivtrafik (buss och spårvagn). Den resulterande modellen som visas till höger förklarar till 91,5% variansen av bilar per hushåll. Totalt testades 55 olika fysiska eller områdesbeskrivande variabler. Modellerna som studerades och enkätstudien pekar på underliggande faktorer som påverkar bilinnehavet. Studiens metod kan kritiseras utifrån sin avgränsning: att fokusera på fysiska faktorer, att utelämna hushållens ekonomiska förutsättningar och att privat parkering inte är inkluderat i modellen på grund av databrist. Dessa två faktorer ansågs vara av stor vikt enligt enkätstudiens respondenter och de planerare som intervjuades. Att känna till approximativa antalet bilar som kommer att finnas i ett område hjälper inte bara till att se hur många parkeringsplatser som behövs men även hur man skulle kunna styra bilinnehavet mot något mer i linje med den nuvarande målsättningen, att minska bilanvändande. Detta betyder inte att man kan förlita sig helt på den presenterade modellen och man kommer heller inte kunna se några exakta effekter från begräsningar av parkeringstal i den
Thunander, Axel, and Tommy Winberg. "Produktionsplanering : Cyklisk produktionsplanering med linjär programmering som vetenskapligt tillvägagångssätt gällande planering inom tillverkningsindustrin." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211442.
Full textTa, Amy, and Maggie Liu. "Från linjär ekonomi till cirkulär ekonomi genom att återanvända och återvinna kvinnliga underkläder." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-26372.
Full textMany of the environmental problems that exist today can be connected to consumer behavior that directly impacts many parts of the environment. Clothing consumption has throughout the year increased dramatically and continues to grow. Engaging sustainably is not only about making green choices but also how to dispose of unwanted clothes in the best way possible. Which is vital to support future generations without depleting the earth’s resources. Knowing how to recycle and reuse clothes is one way to engage in a more sustainable consumption in resource-saving and financial favorability. Lingerie is often a category of clothing that falls between two chairs when discussing the recycling of clothes. This study aims to examine what women in Sweden today do when buying and getting rid of lingerie and what motives, reasons, and attitudes stand behind their actions. The result shows that the majority throw their lingerie in the household trash bin and that they experience it is difficult to recycle underwear. The other group that already recycles their underwear does it because of environmental reasons and claims that they do not find it hard to recycle. However, the attitude towards recycling underwear remains positive among everyone. In addition, the result shows that the majority has never bought lingerie secondhand before. The reason for this is that it is perceived to be unhygienic. The attitude remains positive towards that reuse of underwear is good for the environment and that it is more economic to buy underwear secondhand rather than newly produced. How the surroundings perceive secondhand underwear affects their attitude towards buying secondhand underwear. In order to increase the consumption of lingerie secondhand rather than buying newly produced ones, bigger changes are needed to change attitudes, perceived control and social norms. A bigger spread of knowledge about the relation between clothing (lingerie) and environment is needed and better solutions in collecting damaged and stained underwear more effectively.
Constantino, Sebastian. "Vikten av att väga avfall : Källsorteras det mer i kommuner med viktbaserad avfallstaxa?" Thesis, Uppsala University, Department of Economics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88738.
Full textDen kommunala avfallstaxan är den avgift kommunen tar ut för att hantera hushållens avfall. Utformningen av taxorna skiljer sig mycket mellan kommuner. En variant är att tillhandahålla vägning av det vanliga brännbara avfallet, hushållet faktureras därefter utifrån hur mycket det har slängt i soporna. Frågan är om invånarnas källsortering påverkas av att kommunen har en viktbaserad taxa? Skiljer sig den eventuella effekten beroende på om det är glas, tidningar, plast- eller pappersförpackningar som källsorteras? För att besvara detta skattas fyra regressionsmodeller, en modell för vardera av de undersökta materialslagen. Resultatet tyder på att en viktbaserad taxa ökar källsorteringen av plast- och pappersförpackningar samt tidningar, men för glas är resultatet inte statistiskt signifikant. Resultaten försvagas dock något av brister i det statistiska underlaget.
Antonsson, Erik. "Mobbvälde eller rättsstat, attityden till medborgargarden och dess orsaker : En kvantitativ explorativ studie." Thesis, Stockholms universitet, Sociologiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-130413.
Full textStenmark, Joakim. "Interaktiv musik och dess effekt på immersion." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-14070.
Full textRovan, Diary Ali, and Erik Swatling. "Vädrets inverkan på utvaldakriminella handlingar inom Stockholms län : En studie baserad på linjär regression." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230174.
Full textThe aim of this bachelor thesis in applied mathematics is to determine if there is a linear relationship between weather and crime. To detect any relationship we gathered crime data from the Swedish National Council for Crime Prevention (BRÅ) and weather data from the Swedish Meteorological and Hydrological Institute (SMHI) within Stockholm county. After which we conducted a linear regression model with a few particular crimes as the response variables. The crime rates were only available as monthly based data. Therefore the analysis was restricted to only include monthly values of crime and weather. From the results we got indications that there is a certain linear relationship between the two, although not that clear. The relationship was only present for the crimes committed strictly outdoors. Before analyzing the results it's vital to understand that in addition to weather, there are many other factors at play. Therefore the aim is not to predict crime rates based on weather forecasts, but merely to identify if there is a trending correlation based on statistics to gain deeper understanding of the subject.
Sandell, Hanna-Lo, and Ellinor Hansson. "Från linjär till webbaserad television - En studie om vilka anpassningar detta innebär för Barnkanalen." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20400.
Full textThis is a phenomenological study that emanates from a case to investigate how platform shifts have affected children's television production. The case that is studied is Sveriges Television (SVT) and what adaptations they have made to their own children's productions in order to maintain their audience. The study investigates how SVT has been working to retain their audience from the increasing number of competitors and the challenges they face doing so. The methods that have been used to collect pertinent data are qualitative interview with four key people at SVT, who work with children's productions, and visual content analysis of their three most popular and successful productions. The purpose of the study is to give insight into Barnkanalen's adaptations, both past and ongoing, regarding their own productions in order to satisfy the target group's needs; as the technical evolution of TV-distribution and ever-changing consumer behaviour. The data that has been used to build a theoretical foundation is prior research within habits of media and consumption behaviour. As well as statistics produced by independent sources. The results of this study shows that SBT is working proactively for the change taking place and has adapted to maintain their competitiveness on the market, something that has also been paying off in form of high viewing rates online.
Samuelsson, Jesper. "Vågkraft - Waves 2.0 : Konceptutvärdering av Waves 1.0 samt omvandling av linjär rörelse till rotation." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55353.
Full textDomeij, Jim, and Kenan Sabani. "Modellering av brotts prispåverkan genom linjär regression : En studie av bostadsrättspriserna i Stockholms kommun." Thesis, KTH, Matematisk statistik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189007.
Full textThis bachelor’s project thesis in mathematical statistics and industrial engineering and management investigates if reported crime rates had any effect on the price per square meter of housing cooperatives in Stockholm municipality between 2012 and 2014. Small and large housing cooperatives were studied in the municipality’s basområden. The analysis used multiple linear regression and OLS (Ordinary Least Squares). Many reports that model housing prices use linear regression, but mainly study the effect of economic variables. Few reports include crime as variables in their models. In this paper six categories of crime are studied, namely murder, assault, robbery, rape, car theft and burglary. The paper can contribute to improve existing valuation models for housing prices if reported crime prove to be significant. The modeling of housing prices was done in collaboration with Valueguard AB. The Swedish Police Authority in Stockholm provided the crime statistics that were used in the regression. The paper consists of two parts. The first part in industrial engineering and management deals with economic indicators that may have an impact on housing prices while the other part in mathematical statistics deals with a regression analysis on the housing prices. The conclusion was that reported crime in five out of six categories had a price effect and some economic variables were also important.
Sigfried, Sean. "Påverkan av adaptiv jämfört med linjär spelmusik på spelglädje : Hur påverkas spelare av musik som adaptivt anpassar sig efter spelet jämfört med musik som repeteras linjärt?" Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-20529.
Full textDet finns övrigt digitalt material (t.ex. film-, bild- eller ljudfiler) eller modeller/artefakter tillhörande examensarbetet som ska skickas till arkivet.
Kasbi, Bahar. "Assessment of optimization control strategies for energy management." Thesis, KTH, Optimeringslära och systemteori, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277835.
Full textMed en ökad efterfrågan på förnybara energikällor utvecklas nya system för att upprätthålla framtida infrastruktur vilket kommer säkra dessa nya energikällor. En av de föreslagna lösningarna är att integrera distribuerade energiresurser till olika hushåll för att effektivt kunna tillgodose lokala energikrav. För att möjliggöra en storskalig integrering av flexibla energiresurser det avgörande är att man kan minska slutkundens energi och effektkostnader. Detta kan nås genom att utforma en optimeringsmodell av problemet som tar hänsyn till olika resourses begränsningar osv. för att minska elkosnaden hos slutkunden. Syftet med detta examensarbete är att undersöka en kontrollstrategi för att använda batterier, värmepumpar och andra tillgångar på ett optimalt sätt, genom att producera de optimala börvärdena med hjälp av den utformade optimeringsalgoritmen som tar hänsyn till bland annat marknads och väderdata samt kund beteende. För att producera dessa börvärden användes methoden känslighetsanalys som är en del inom linjär programmering och fokus har varit styrningen av värmepumpar. Resultaten visar att tillämpningen av denna metod leder till att de optimala börvärdena över det icke-kontrollerbara elektriska lasten erhålles, med ett lågt antal optimeringar, dvs att metoden har hög beräknings-effektivitet samt noggrannhet. Följaktligen kan regulatorn med de givna börvärdena som ingång enkelt justera värmepumpens utgångseffekt baserat på realtids icke-kontrollerbar elektriska lasten, utan att skapa några toppar och extra kostnader för kunderna.
Herrera, Mikael, and Georg Schierbeck. "Disadvantages of using non-linear video in shallow learning situations : A critical perspective on current trends." Thesis, Södertörns högskola, Medieteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-31977.
Full textVideo påvisas förbättra kommunikationen av kunskap genom att förmedla fakta i samband med att visuellt demonstrera information i praktiken (Bishop & Verleger, 2013; Kim, 2013). Moderna pedagogiska metoder som det flippade klassrummet och MOOCs (MOOC, 2016) grundar sig att implementera video som en lärande resurs. Det traditionella linjära videoformatet har länge ifrågasatts genom icke-linjär video, både när det gäller interaktivt material men även segmenterat och indexerat innehåll (Zhang et al. 2006). Med ett kritiskt förhållningssätt (Bardzell, J & Bardzell, S, 2013) undersöker vi det icke-linjära video formatet, i synnerhet om det icke-linjära formatet påverkar effektiviteten av inlärning. Vi har utfört ett observationsexperiment för att undersöka effektiviteten av icke-linjär jämfört med linjär video. Resultaten från experimentet visar på att gruppen som använde icke-linjär video svarade på färre frågor än gruppen som använde linjär videon.
Engström, Victor. "Funktionen av stokastisk musik i datorspel : En undersökning av stokastiskt rekombinerad musiks påverkan i spelet Thunder League." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-12846.
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