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• 51. Allwood, Jens
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Transliteration between Spoken Language Corpora: Moving between Danish BySoc and Swedish GSLC2005In: Nordic Journal of Linguistics, Vol. 28, no 1, p. 5-36Article in journal (Refereed)
• 52.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Accuracy, effectiveness and improvement of Vibration-based Maintenance in Paper Mills: Case Studies2000In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 229, no 2, p. 389-410Article in journal (Refereed)

Many current vibration-based maintenance (VBM) policies for rolling element bearings do not use as much as possible of their useful lives. Evidence and indications to prolong the bearings’ mean effective lives by using more accurate diagnosis and prognosis are confirmed when faulty bearing installation, faulty machinery design, harsh environmental condition and when a bearing is replaced as soon as its vibration level exceeds the normal. Analysis of data from roller bearings at two paper mills suggests that longer bearing lives can be safely achieved by increasing the accuracy of the vibration data. This paper relates bearing failure modes to the observed vibration spectra and their development patterns over the bearings’ lives. A systematic approach, which describes the objectives and performance of studies in two Swedish paper mills, is presented. Explanations of the mechanisms behind some frequent modes of early failure and ways to avoid them are suggested. It is shown theoretically, and partly confirmed by the analysis of (unfortunately incomplete) data from two paper mills over many years, that accurate prediction of remaining bearing life requires: (a) enough vibration measurements, (b) numerate records of operating conditions, (c) better discrimination between frequencies in the spectrum and (d) correlation of (b) and (c). This is because life prediction depends on precise knowledge of primary, harmonic and side band frequency amplitudes and their development over time. Further, the available data, which are collected from relevant plant activities, can be utilised to perform cyclic improvements in diagnosis, prognosis, experience and economy.

• 53.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Uppträdande problem i elkraftsammanhang: Orsak, verkan och åtgjärder2006Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
• 54.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Matematiska prefix: Hur läromedel tar upp kunskapen om de matematiska prefixen och vilka kunskaper elever i år 6 har i ämnet2007Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis

Syftet med mitt examensarbete var att ta reda på hur läromedel i matematik för år 4-6 tar upp kunskapen om prefixen kring vikt, längd och volym och vilka kunskaper elever i år 6 har i ämnet.

Jag har analyserat fem olika läromedel och gjort en enkätundersökning i fem klasser. Genom min undersökning har jag kommit fram till att läromedlen ger eleverna för få tillfällen att praktiskt erfara kunskaper om de olika enheterna. De flesta informerar om vad prefixen betyder men det förekommer inga arbetsuppgifter där eleverna får lära och förstå sammanhanget och nyttan med att kunna dem. Resultatet av min enkätundersökning visade att många elever vet vad enheterna för längd, vikt och volym heter, men har dåliga kunskaper i vad prefixen betyder och svårigheter med att omvandla enheterna. I slutet av mitt examensarbete ger jag några förslag på hur undervisningen kan läggas upp för att ge eleverna större möjlighet att förstå prefixens betydelse och nyttan med kunskapen.

• 55.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
On the Relevance of Fractional Gaussian Processes for Analysing Financial Markets2007Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

In recent years, the field of Fractional Brownian motion, Fractional Gaussian noise and long-range dependent processes has gained growing interest. Fractional Brownian motion is of great interest for example in telecommunications, hydrology and the generation of artificial landscapes. In fact, Fractional Brownian motion is a basic continuous process through which we show that it is neither a semimartingale nor a Markov process. In this work, we will focus on the path properties of Fractional Brownian motion and will try to check the absence of the property of a semimartingale. The concept of volatility will be dealt with in this work as a phenomenon in finance. Moreover, some statistical method like R/S analysis will be presented. By using these statistical tools we examine the volatility of shares and we demonstrate empirically that there are in fact shares which exhibit a fractal structure different from that of Brownian motion.

• 56.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Protect Data Privacy in E-Healthcare in Sweden2007Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis

Sweden healthcare adopted much ICT (information and communication technology). It is a highly information intensive place. This thesis gives a brief description of the background of healthcare in Sweden and ICT adoption in healthcare, introduces an Information system security model, describes the technology and law about data privacy and carries out a case through questionnaire and interview.

• 57.
Russian State University.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Applied algebraic dynamics2009Book (Refereed)
• 58.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Matematik.
A modiﬁed Schwarz–Christoffel mapping for regions with piecewise smooth boundaries2008In: Journal of Computational and Applied Mathematics, ISSN 0377-0427, Vol. 213, no 1, p. 56-70Article in journal (Refereed)

A method where polygon corners in Schwarz-Christoffel mappings are rounded, is used to construct mappings from the upper half-plane to regions bounded by arbitrary piecewise smooth curves. From a given curve, a polygon is constructed by taking tangents to the curve in a number of carefully chosen so called tangent points. The Schwarz-Christoffel mapping for that polygon is then constructed and modified to round the corners.

Since such a modification causes effects on the polygon outside the rounded corners, the parameters in the mapping have to be re-determined. This is done by comparing side-lengths in tangent polygons to the given curve and the curve produced by the modified Schwarz-Christoffel mapping. The set of equations that this comparison gives, can normally be solved using a quasi--Newton method.

The resulting function maps the upper half--plane on a region bounded by a curve that apart from possible vertices is smooth, i.e., one time continuously differentiable, that passes through the tangent points on the given curve, has the same direction as the given curve in these points and changes direction monotonically between them. Furthermore, where the original curve has a vertex, the constructed curve has a vertex with the same inner angle.

The method is especially useful for unbounded regions with smooth boundary curves that pass infinity as straight lines, such as channels with parallel walls at the ends. These properties are kept in the region produced by the constructed mapping.

• 59.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Modified Schwarz–Christoffel mappings using approximate curve factors2009In: Journal of Computational and Applied Mathematics, ISSN 0377-0427, E-ISSN 1879-1778, Vol. 233, no 4, p. 1117-1127Article in journal (Refereed)

The Schwarz–Christoffel mapping from the upper half-plane to a polygonal region in the complex plane is an integral of a product with several factors, where each factor corresponds to a certain vertex in the polygon. Different modifications of the Schwarz–Christoffel mapping in which factors are replaced with the so-called curve factors to achieve polygons with rounded corners are known since long times. Among other requisites, the arguments of a curve factor and its correspondent scl factor must be equal outside some closed interval on the real axis.

In this paper, the term approximate curve factor is defined such that many of the already known curve factors are included as special cases. Additionally, by alleviating the requisite on the argument from exact to asymptotic equality, new types of curve factors are introduced. While traditional curve factors have a C1 regularity, C regular approximate curve factors can be constructed, resulting in smooth boundary curves when used in conformal mappings.

Applications include modelling of wave scattering in waveguides. When using approximate curve factors in modified Schwarz–Christoffel mappings, numerical conformal mappings can be constructed that preserve two important properties in the waveguides. First, the direction of the boundary curve can be well controlled, especially towards infinity, where the application requires two straight parallel walls. Second, a smooth (C) boundary curve can be achieved.

• 60.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Numerical Conformal mappings for regions Bounded by Smooth Curves2006Licentiate thesis, monograph (Other academic)

In many applications, conformal mappings are used to transform two-dimensional regions into simpler ones. One such region for which conformal mappings are needed is a channel bounded by continuously differentiable curves. In the applications that have motivated this work, it is important that the region an approximate conformal mapping produces, has this property, but also that the direction of the curve can be controlled, especially in the ends of the channel.

This thesis treats three different methods for numerically constructing conformal mappings between the upper half-plane or unit circle and a region bounded by a continuously differentiable curve, where the direction of the curve in a number of control points is controlled, exact or approximately.

The first method is built on an idea by Peter Henrici, where a modified Schwarz-Christoffel mapping maps the upper half-plane conformally on a polygon with rounded corners. His idea is used in an algorithm by which mappings for arbitrary regions, bounded by smooth curves are constructed.

The second method uses the fact that a Schwarz-Christoffel mapping from the upper half-plane or unit circle to a polygon maps a region Q inside the half-plane or circle, for example a circle with radius less than 1 or a sector in the half--plane, on a region Omega inside the polygon bounded by a smooth curve. Given such a region Omega, we develop methods to find a suitable outer polygon and corresponding Schwarz-Christoffel mapping that gives a mapping from Q to Omega.

Both these methods use the concept of tangent polygons to numerically determine the coefficients in the mappings.

Finally, we use one of Don Marshall's zipper algorithms to construct conformal mappings from the upper half--plane to channels bounded by arbitrary smooth curves, with the additional property that they are parallel straight lines when approaching infinity.

• 61.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Numerical Conformal Mappings for Waveguides2009Doctoral thesis, comprehensive summary (Other academic)

Acoustic or electro-magnetic scattering in a waveguide with varying direction and cross-section can be re-formulated as a two-dimensional scattering problem, provided that the variations take place in only one dimension at a time. By using the so-called Building Block Method, it is possible to construct the scattering properties of a combination of scatterers when the properties of each scatterer are known. Hence, variations in the waveguide geometry or in the boundary conditions can be treated one at a time. Using the Building Block Method, the problem takes the form of the Helmholtz equation for stationary waves in a waveguide of infinite length and with smoothly varying geometry and boundary conditions. A conformal mapping is used to transform the problem into a corresponding problem in a straight horizontal waveguide, and by expanding the field in Fourier trigonometric series, the problem can be reformulated as an infinite-dimensional ordinary differential equation. From this, numerically solvable differential equations for the reflection and transmission operators are derived. To be applicable in the Building Block Method, the numerical conformal mapping must be constructed such that the direction of the boundary curve can be controlled. At the channel ends ,it is an indispensable requirement, that the two boundary curves are (at least) asymptotically parallel and straight. Furthermore, to achieve bounded operators in the differential equations, the boundary curves must satisfy different regularity conditions, depending on the boundary conditions. In this work, several methods to accomplish such conformal mappings are presented. The Schwarz–Christoffel mapping, which is a natural starting point and for which also efficient numerical software exists, can be modified in different ways in order to achieve polygons with rounded corners. We present algorithms by which the parameters in the mappings can be determined after such modifications. We show also how the unmodified Schwarz–Christoffel mapping can be used for regions with a smooth boundary. This is done by constructing an appropriate outer polygon to the considered region.Finally, we introduce one method that is not Schwarz–Christoffel-related, by showing how one of the so-called zipper algorithms can be used for waveguides. Keywords: waveguides, building block method, numerical conformalmappings, Schwarz–Christoffel mapping, rounded corners method, approximate curve factors, outer polygon method, boundary curvature, zipper method, geodesic algorithm, acoustic wave scattering, electro-magnetic wave scattering

• 62.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
On the curvature of an inner curve in a Schwarz-Christoffel mapping2007Report (Other academic)

In the so called outer polygon method, an approximative conformal mapping for a given simply connected region \Omega is constructed using a Schwarz-­Christoffel mapping for an outer polygon, a polygonal region of which \Omega is a subset. The resulting region is then bounded by a C^\infty -curve, which among other things means that its curvature is bounded.

In this work, we study the curvature of an inner curve in a polygon, i.e., the image under the Schwarz-­Christoffel mapping from R, the unit disk or upper half­plane, to a polygonal region P of a curve inside R. From the Schwarz-­Christoffel formula, explicit expressions for the curvature are derived, and for boundary curves, appearing in the outer polygon method, estimations of boundaries for the curvature are given.

• 63.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Schwarz–Christoffel Mappings for Nonpolygonal Regions2008In: SIAM Journal on Scientific Computing, ISSN 1064-8275, E-ISSN 1095-7197, Vol. 31, no 1, p. 94-111Article in journal (Refereed)

An approximate conformal mapping for an arbitrary region $\varOmega$ bounded by a smooth curve $\varGamma$ is constructed using the Schwarz–Christoffel mapping for a polygonal region in which $\varOmega$ is embedded. An algorithm for finding this so-called outer polygon is presented. The resulting function is a conformal mapping from the upper half-plane or the unit disk to a region $R$, approximately equal to $\varOmega$. $R$ is bounded by a $C^\infty$ curve, and since the mapping function originates from the Schwarz–Christoffel mapping and tangent polygons are used to determine it, important properties of $\Gamma$ such as direction, linear asymptotes, and inflexion points are preserved in the boundary of $R$. The method makes extensive use of existing Schwarz–Christoffel software in both the determination of outer polygons and the calculation of function values. By the use suggested here, the capabilities of such well-written software are extended.

• 64.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Matematik.
Using a Zipper Algorithm to find a Conformal Map for a Channel with Smooth Boundary2006In: AIP Conference Proceedings: Second Conference on Mathematical Modeling of Wave Phenomena, American Institute of Physics, New York , 2006, p. 378-Conference paper (Refereed)

The so called geodesic algorithm, which is one of the zipper algorithms for conformal mappings, is combined with a Schwarz–Christoffel mapping, in its original or in a modiﬁed form, to produce a conformal mapping function between the upper half-plane and an arbitrary channel with smooth boundary and parallel walls at the end.

• 65.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Acoustic Transmission in Ducts of Various Shapes with an Impedance Condition2008In: International Conference on Numerical Analysis and Applied Mathematics 2008, AIP, Melville, USA , 2008, p. 33-36Conference paper (Refereed)

Propagation of acoustic waves in a two-dimensional duct with an impedance condition at the boundary, is studied. The duct is assumed to have two ends at infinity being asymptotically straight, but otherwise to be arbitrarily shaped.The so called Building Block Method allows us to synthesize propagation properties for ducts with complicated geometries from results for simpler ducts. Conformal mappings can be used to transform these simple ducts to straight ducts with constant cross-sections.By using recently developed techniques for numerical conformal mappings, it is possible to construct a transformation between an infinite strip and an arbitrarily shaped duct with smooth or piecewise smooth boundary, keeping both smoothness and the well controlled boundary direction towards infinity that the above mentioned method requires.To accomplish a stable formulation of the problem, we express it in terms of scattering operators. The resulting differential equation is solved using wave splitting and invariant embedding techniques. We expand the involved functions in Fourier series, and hence, it is possible to give the operators a matrix representation. Numerical results are produced using truncated matrices.

• 66.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Electro-Magnetic Scattering in Variously Shaped Waveguides with an Impedance Condition2009In: Mathematical modelling of wave phenomena: 3rd Conference on Mathematical Modelling of Wave Phenomena, Växjö, Sweden, 9 – 13 June 2008, Melville, New York: American Institute of Physics , 2009, p. 36-45Conference paper (Refereed)

Electro-magnetic scattering is studied in a waveguide with varying shape and crosssection. Furthermore, an impedance or admittance condition is applied to two of the waveguide walls. Under the condition that variations in geometry or impedance take place in only one plane at the time, the problem can be solved as a two-dimensional wave-scattering problems. By using newly developed numerical conformal mapping techniques, the problem is transformed into a wave-scattering problem in a straight two-dimensional channel. A numerically stable formulation is reached in terms of transmission and reflection operators. Numerical results are given for a slowly varying waveguide with a bend and for one more complex geometry.

• 67.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Förbättrad Internkommunikation2007Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
• 68.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Elever med fallenhet för matematik i skolår 1-3: En fallstudie om hur några lärare upptäcker, bemöter och stimulerar dessa elever2007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Syftet med detta examensarbete var att undersöka hur några lärare i skolår 1-3 möter och stimulerar elever med matematisk fallenhet. I bakgrunden presenteras lärarens betydelse, elevernas behov, individualisering, myter, hur man upptäcker och stimulerar dessa elever. Undersökningen är en fallstudie som bottnar i den kvalitativa metoden. Vi har intervjuat sex lärare. I resultatet såg vi att många av lärarna tyckte att de elever som har fallenhet för matematik visade på olika förmågor. Dessa förmågor är några av de som Krutetskii skriver om. När det gäller bemötandet av och hur de stimulerar elever med matematisk fallenhet så fanns det olika strategier hos lärarna. Något vi också upptäckte i vårt resultat var att ingen av lärarna, i undersökningen, berörde sin egen roll när det gäller att upptäcka dessa elever. Slutsatsen vi kunnat dra är att lärarna för det mest är medvetna om eleverna med matematisk fallenhet men kanske inte alltid om deras behov.

• 69.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Laborativ matematik: Ett sätt att variera undervisningen2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Skolverkets undersökningar visar att elevernas intresse för matematik i grundskolans senare år är lågt. Undervisningen är alltför läroboksstyrd. Eleverna vill ha en mera varierad undervisning där sådant som diskussioner om matematikens användning, gruppuppgifter och verklighetsanknytning ingår. Ett sätt att variera undervisningen kan vara att arbeta laborativt.

Syftet med arbete är bland annat att ta reda på hur mycket lärarna använder sig av laborativ matematik samt vilka erfarenheter de har av arbetssättet. Resultatet av studien bygger på en enkätundersökning bland matematiklärare och några intervjuer med matematiklärare som arbetar laborativt.

Nästan alla av de lärare som besvarat enkäten arbetar laborativt men det går inte att dra några generella slutsatser i vilken utsträckning lärare i allmänhet arbetar laborativt eftersom antalet besvarade enkäter var mycket lågt. Enkätundersökningen visar att de lärare som arbetar laborativt i liten utsträckning eller inte alls anger tidsbrist som främsta orsak. Att planera laborativ undervisning tar lång tid. Anledningen till att man skulle vilja arbeta laborativt oftare är att undervisningen blir mera varierad och att förståelsen hos eleverna ökar. Intervjuerna visar att de lärare som ofta arbetar laborativt motiverar det med att eleverna får vara kreativa och använda flera sinnen. Lärarna tycker även att det är viktigt att det laborativa arbetet kombineras med diskussioner. Eleverna får då träna sin språkutveckling och hjälp med att översätta konkret matematik till abstrakt.

• 70.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Informationsåteranvändning: En framtida helhetslösning2005Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

Återanvändning av information utgår ifrån att bryta ner den informationen man planerar att återanvända i moduler som struktureras upp. Dessa moduler kan sedan användas för att bygga upp ny information till nya produkter. Genom att ha en organisation där avdelningarna arbetar nära varandra har man en möjlighet att förbättra återanvändningen och skapa ett system med både information och kunskapsutbyte. Genom planering kan man maximera möjligheterna och undvika flertalet hinder.

Informationen skall vara välstrukturerad med en vald målgrupp för att lättare kunna återanvändas. Produkten har en betydande roll i återanvändning där enklare produkter är av mindre behov av strukturering än komplexa. Informationen är inte styrs av om produkten är en fysisk eller digital produkt utan de båda påverkas efter samma faktorer.

All återanvändning påverkas av företagets huvudmål för införandet och påverkas av marknaden samt företagets ekonomiska situation. Det finns ingen klar lösning för återanvändning utan det måste anpassas till de unika förhållandena i det aktuella fallet.

• 71.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Algebra och funktioner i gymnasieskolan på NV - programmet: En jämförelse av innehållet i svenska och rumänska läroböcker -2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Abstract

I studien jämförs matematikläroböcker från Sverige och Rumänien inom två områden: algebra och funktioner, med fokus på andragradsekvationen och andragradsfunktionen. Den teoretiska delen och uppgifterna som undersöks hör till läroböcker under gymnasiets första år på NV - programmet. Läroböckerna undersöks med hänsyn till tre perspektiv: det teoretiska upplägget, uppgiftsinnehållet och hur det historiska perspektivet på matematikens utveckling införs i läroböckerna. Granskningen av läroböckerna utförs utifrån kursplanernas innehåll och mål i de två länderna. Kursplanernas innehåll och mål för undervisning i matematik för NV-programmet granskas med hjälp av en empirisk metod, medan läroböckernas teoretiska upplägg, uppgiftsinnehållet och det historiska perspektivet i läroböckerna undersöks kvalitativt. Undersökningen baseras på en samling matematiska begrepp, typer av uppgifter och aspekter ur det historiska perspektivet. Resultatet anges i sammanfattande tabellform, som underlättar läsning och analys av likheter och skillnader. Jämförelsen av kursplanerna finner många likheter när det gäller måluppfyllelse och markanta skillnader i innehållet och uppdelning av det matematiska stoffet mellan olika årskurser. Den rumänska kursplanen betonar inte användning av miniräknare i matematikundervisningen, elevernas arbete i mindre grupper och miljöfrågor. De rumänska och svenska kursplanerna har liknande mål när det gäller förmågor som eleverna ska utveckla under utbildningen, men metodiken som används i läroböckerna för att uppfylla dessa mål skiljer sig både när det gäller presentation av teori och uppgifter. De rumänska läroböcker har inga uppgifter som anlitar tekniska hjälpmedel. Det finns också vissa skillnader när det gäller det matematiska språket som används i läroböckerna. I rumänska läroböcker är språket mer teoretiskt och presenterar flera matematiska begrepp, medan de svenska läroböckerna föredrar repetition av algebraiska kalkyler och presenterar teorin mest på ett praktiskt sätt. De svenska läroböckerna har flera uppgifter med lösning av andragradekvation och textbaserade uppgifter än rumänska läroböckerna, medan de rumänska läroböckerna har större variation och presenterar flera typer av ekvationer, uppgifter om matematisk modellering och uppgifter med olika matematiska krav. Den svenska modellen visar en mångfald av uppgifter i läroboken, vilka passar att lösa både med och utan räknare. När det gäller det historiska perspektivet på matematikutveckling finns både likheter och skillnader. Alla läroböckerna använder samma metoder och regler för algebriska kalkyler och för att lösa andragradsekvationen men de svenska läroböckerna presenterar även korta beskrivningar av matematiker som bidrog till matematikens utveckling och en del historiska uppgifter.

• 72.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Gymnasiematematik på distans: Varför så många avbryter sina distansstudier i matematik2006Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Syftet med studien är att undersöka varför det är så många distansstudenter som avbryter sina distansstudier i matematik. Distansutbildning (DU) är en studieform i stark frammarsch. Nyckelorden för en lyckad DU är bland annat flexibilitet och individanpassning. Medan flexibiliteten framförallt ökar tillgängligheten står individanpassningen som garant för en god lärsituation. Faktorer som i hög grad påverkar DU och genomströmningen är studiemotiv, artefakter och hur det sociala sammanhanget upplevs. Jag har i min undersökning samlat in data med hjälp av kvalitativa intervjuer och dessutom granskat distansupplägget som eleverna på den aktuella skolan haft. Urvalsgruppen består av fem stycken elever i olika åldersgrupper som redan klarat av halva kursen. Även analysen har skett med en kvalitativ ansats. I den aktuella studien kan man se att många av de riskfaktorer som tros ligga bakom många avhopp även föreligger här med det aktuella studieupplägget.

• 73.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Datalogi.
Dynamic Software Architectures2007Doctoral thesis, monograph (Other academic)

Software architecture is a software engineering discipline that

provides notations and processes for high-level partitioning of

systems' responsibilities early in the software design process. This

thesis is concerned with a specific subclass of systems, systems with a dynamic software architecture. They have practical applications in various domains such as high-availability systems and ubiquitous computing.

In a dynamic software architecture, the set of architectural elements and the configuration of these elements may change at run-time. These modifications are motivated by changed system requirements or by changed execution environments. The implications of change events may be the addition of new functionality or re-configuration to meet new Quality of Service requirements.

This thesis investigates new modeling and implementation techniques for dynamic software architectures. The field of Dynamic Architecture is surveyed and a common ground defined. We introduce new concepts and techniques that simplify understanding, modeling, and implementation of systems with a dynamic architecture, with this common ground as our starting point. In addition, we investigate practical use and reuse of quality implementations, where a dynamic software architecture is a

fundamental design principle.

The main contributions are a taxonomy, a classification, and a set of architectural patterns for dynamic software architecture. The taxonomy and classification support analysis, while the patterns affect design and implementation work directly. The investigation of practical applications of dynamic architectures identifies several issues concerned with use and reuse, and discusses alternatives and solutions where possible.

The results are based on surveys, case studies, and exploratory development of dynamic software architectures in different

application domains using several approaches. The taxonomy,

classification and architecture patterns are evaluated through several experimental prototypes, among others, a high-performance scientific computing platform.

• 74.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Katholieke Universiteit Leuven.
Reflecting on self-adaptive software systems2009In: Software Engineering for Adaptive and Self-Managing Systems, 2009. SEAMS '09. ICSE Workshop on, 2009, Vol. 0, p. 38-47Conference paper (Refereed)
• 75.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Katholieke Universiteit Leuven.
Modeling Dimensions of Self-Adaptive Software Systems2009In: Software Engineering for Self-Adaptive Systems / [ed] Betty H.C. Cheng, Rogério de Lemos, Holger Giese, Paola Inverardi and Jeff Magee, Springer, 2009, Vol. 5525, p. 27-47Chapter in book (Other academic)
• 76.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Datalogi.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Datalogi.
The Puppeteer — Directing Software Engineering Projects2008In: International Conference on Computer Science and Software Engineering: CSSE 2008, IEEE Computer Society , 2008Conference paper (Refereed)

Software engineering projects are often used to teach complex aspects of software engineering. It is well-known that these courses are difficult to run. In this paper we address one aspect that can be used to reduce differences between projects and project groups to more easily find the balance of “challenging but possible”. We describe the role of the “puppeteer” and present four communication patterns that we use in an international software engineering project course.

• 77.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science. Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science.
Profile-guided Composition2008In: 7th International Symposium on Software Composition, Springer , 2008, p. 157-164Conference paper (Refereed)
• 78.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science. Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Computer Science.
Automatic Rule Derivation for Adaptive Architectures2008In: 8th IEEE/IFIP Working Conference on Software Architecture, IEEE , 2008, p. 323-326Conference paper (Refereed)

This paper discusses on-going work in adaptive architectures concerning automatic adaptation rule derivation. Adaptation is rule-action based but deriving rules that meet the adaptation goals are tedious and error prone. We present an approach that uses model-driven derivation and training for automatically deriving adaptation rules, and exemplify this in an environment for scientific computing.

• 79.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Kunskapsöverföring: En teoretisk verklighet?2008Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

Kraven på dagens företag har ökat markant de senaste åren. För dagens

företag är det viktigt att hela tiden kunna mäta sig och helst även vara

steget före sina konkurrenter. En viktig del i detta är att ha rätt typ av

kompetens inom olika områden och positioner inom det egna företaget.

För att uppnå det är det idag vanligt att företagen arrangerar traineeprogram.

I denna uppsats beskrivs problematiken vid kunskapsöverföring till

en trainee och de problemområden som finns kring den processen.

För att kunna utforma ett väl fungerande traineeprogram från företagets

sida är det mycket viktigt att förstå vilka mål som företaget vill uppnå genom

att genomföra ett traineeprogram.

Vårt tillvägagångssätt och metodval var att intervjua personer som genomgått

fallföretagets traineeprogram. Vi formulerat vårt problem som är;

Hur överförs kunskap till trainees inom vårt fallföretag idag och kan den

förbättras?

Under arbetets gång upptäckte vi brister i fallföretagets traineeprogram

men vi fann även många positiva delar. Empiri avsnittet gav oss mycket

värdefull kunskap som vi hade nytta av i analys samt slutsats avsnittet. I

vår slutsats redovisar vi olika förslag och rekommendationer till möjliga

åtgärder beträffande metodval för kunskapsöverföring.

• 80.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Matematiksvårigheter: En studie av högfrekventa felområden2007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Syftet med arbetet är att utreda vanligt förekommande fel och svårigheter i matematik hos elever med matematiksvårigheter i årskurserna 6-9. Syftet är även att undersöka hur medvetna eleverna är om sina svårigheter. Vilka kriterier används för att bestämma vem som ska få extra hjälp och stöd? För att besvara mitt syfte har jag använt mig av kvalitativa intervjuer av elever, matematiklärare och en specialpedagog samt gjort litteraturstudier.

De lärare och den specialpedagog som jag intervjuat anser att många elever med matematiksvårigheter har problem inom taluppfattning och de fyra räknesätten. Bristerna ligger på elementär nivå vilket ger vidare svårigheter, när de avancerar inom matematiken. Medvetenheten hos dessa elever, om sina svårigheter, är ytterst individuella beroende på deras självbild. Lärarna använder olika sorters material exempelvis ALP-test, diagnosmaterialet från Skolverket samt egna diagnoser för att kontrollera om elever kommer att uppnå betyget Godkänt.

• 81.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Matematiksvårigheter: Anpassad undervisning2006Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Astract: Syftet med vårt arbete var att undersöka hur lärare identifierade och tillgodosåg de behov elever med matematiksvårigheter har. Som metod valde vi kvalitativa intervjuer med frågor som hade strukturell utformning. Vi gjorde ett slumpmässigt urval av skolor i närliggande kommuner och begränsade oss att göra åtta intervjuer med lärare i årskurs 1-6. Resultatet blev att lärare bemötte elever med matematiksvårigheter på olika sätt. Skillnaderna fanns i vilken omfattning de arbetade med konkret material, gav dem mer tid i form av grupptimmar och arbetstakt för att hinna befästa kunskapen samt tillgång till speciallärare. Lärarna dokumenterade eleverna genom egna anteckningar och former av checklistor, portfolio, IUP (Individuella Utvecklings Planer) och i utvecklingssamtalen, där behov av särskilt stöd till eleven uppkom även utmynnade i åtgärdsprogram.

• 82.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Securing an ERP Implementation2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

An implementation project of an ERP system results in large changes. Organizations

that face an ERP implementation project have several risks to

consider in order to avoid problems that cause failures. The purpose of

this research is to extend existing models and create a method for implementation

of ERP systems. The method has then been employed to an

ongoing project at the department of Procurement and Supply at Ericsson

Mobile Platforms in Lund. Objectives for the research are to consider

which implementation strategy can be used and how an organization can

minimize risks.

The research approach and methodology is influenced by the qualitative

research method since it was necessary to gather qualitative facts instead

of quantitative facts. Included is also a case study due to the research is

executed within Ericsson Mobile Platforms in Lund.

There are two main opposite implementation strategies, Big Bang and

Step-by-Step. The choice of implementation strategy depends on number

of factors like the size of the organizations, complexity and resources.

A method of ERP implementation has been put forward as a result of the

integrated models. The method includes an overall model and a check list.

Risk identification is a problem that many implementation project faces, a

way to solve this is to make a careful risk analysis, a risk matirx with several

identified risks are putted forward throughout this study.

• 83.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Detecting known host security flaws over a network connection2007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

To test if a host contains any known security flaws over a network connection a Vulnerability Assessment (VA) could be made. This thesis describes different techniques used by VA tools over a network connection to detect known security flaws. To decrease the risk of flaws not being detected, several VA tools could be used.

There is no common way of merging information from different VA tools. Therefore the Vulnerability Assessment Information Handler (VAIH) has been developed. The VAIH system consists of three parts. First, a intermediate language format defined in XML. Second, modules that converts the output of VA tools to the intermediate language format. Third, a program for reading and displaying the intermediate language format.

The VAIH system makes it possible to merge the results from vulnerability assessment tools into one file that can be displayed and edited through a GUI.

• 84.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Software Security Testing: A Flexible Architecture for Security Testing2008Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

Abstract: This thesis begins with briefly describing a few vulnerability classes that exist in today’s software. We then continue by describing how these vulnerabilities could be discovered through dynamic testing. Both general testing techniques and existent tools are mentioned.

The second half of this thesis present and evaluates a new flexible architecture. This new architecture has the ability to combine different approaches and create a more flexible environment from where the testing can be conducted. This new flexible architecture aims towards reducing maintenance and/or adaptation time for existing tools or frameworks. The architecture consists of a given set of plug-ins that can be easily replaced to adapt test as needed. We evaluate this architecture by implementing test plug-ins. We also use this architecture and a set of test plug-ins to generate a fuzzer targeted to test a known vulnerable server.

• 85.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Ett vårdinformationssystem i vårdens frontlinje: En fallstudie om Cambio Cosmic på en vårdcentral i Landstinget Kronoberg2007Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

In healthcare there is a rapid development towards introducing and implementing a wide range of information technology (IT) to aim for higher quality and more effective care. A common health information system (Cambio Cosmic) has been implemented in Landstinget Kronoberg. Clinical microsystems are the frontline units where staff and pa-tient meet. When the conditions in the microsystems are changed, it is interesting to de-scribe and analyse the consequences.

The purpose of this study is to describe how health care staff uses a health information sys-tem and how they experience its functionality in their patient work. Initially, a literature re-view about the use of health information system was undertaken, followed by a qualitative case study based on interviews about how healthcare staff describes their reality. In March 2007 general practitioners, district nurses and practical nurses at the health care center in Markaryd were interviewed. The results were analysed using a modified microsystem the-ory. The analysis showed that the health care staff in Markaryd used Cambio Cosmic for medical record, time planning, cash handling, laboratory examinations and results, and medications. Apart from Cosmic, they used several other information systems IT- or pa-perbased.

The staff experienced that Cosmic did support their patient work, but technical deficiencies impeded use. The staff required a more rapid system, integration of systems and more per-sonal adaptations. A common health information system was seen as a strength in the care process. Co-operation between staff and with other caregivers was facilitated and Cosmic contributed to a more efficient work pattern. The patients could receive improved service and information. In general, the staff thought that they had access to the right information for the care of the patient, but improvements were needed for access to information at the right point of time. Cosmic was not used to improve work at the health care center. The staff expressed a positive attitude towards working with and in Cosmic. Based on the re-sult, improvements at both micro- and macrosystems levels are recommended.

• 86.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
En studie om EU-direktiv 2005/0182: – med fokus på personlig integritet, etik och gällande direktiv2006Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis

At the beginning of year 2006 EU directive 2005/0182 was approved by the European parliament. The directive contains rules concerning the retention of traffic and localization data created with electronically communication. This data will be stored between six months and 1 year depending on the data type. The intension is to use the data to detect, investigate and prosecute heavy criminals and terrorists.

This study contains three different problem areas, if the directive op-poses to existing directives and conventions. The relationship between personal integrity and storage of personal information is also investi-gated. The last area is ethical issues with the storing of personal data.

The result is divided into three parts, one for each problem area. It shows that the new directive don’t comply with article 8 in the European convention on human rights. Although all the articles presented are open for wide interpretation.

Peter Seipel has made a categorization of six different views of the per-sonal integrity. It is clear that the new directive will affect the personal integrity.

The ethical view on the directive is concentrated to who will benefit from the changes and witch goals are the directive set to meet. Often the rules of ethics will conflict with each other because of two sets of rules can’t exist together.

• 87.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
RSS – The future of internal communication?2005Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

RSS is a format for easy information sharing between computers. A RSS-file, also known as a feed or a channel, consist of a list of items. The items are structured with XML-tags and have to be processed in some way before it can be read. RSS¬readers, web-browsers with RSS support and e-mail-clients with RSS support can be used to display the feed.

This thesis is focused to investigate if RSS can be used within an enterprise for internal communication. We look at different computer based communication tools that are available today and compare them with RSS. All the different tools has there advantages as well as disadvantages, we have tried to find out if there is room for one more information channel within an enterprise.

Our study shows that RSS is not suitable as a stand alone solution for internal combination. RSS main strengths lies in mass information that has to be pushed out in one direction.

• 88.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Konkreta matematikproblem: En studie av lösningsstrategier i förskolan och skolår32007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
• 89.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Affärsmodeller inom E-commerce: – Hur lyckas man som småföretagare på Internet2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

To start a company on the Internet is something that has appealed a lot of people during the last couple of years. Some of the companies have succeeded in their struggle but a lot of companies have failed to live out their ambition. This paper deals with the concept of e-commerce and aims to study whether or not the companies that has succeeded has made use of business models and what other factors that is important that you wont find in any written theory.

The paper also aims to study the concept of business models and what a business model consists of. To be able to do this research we have interviewed three different companies that are all active in e-commerce and have survived for at least three years. Two of the companies are classical web shops that sell products to their customers and the last one is a site with articles about hardware and IT business in general. The company that provides articles receives their incomes from advertising sales.

The results from these research has been compared to what the theory says to see if the theoretical business models is being used and to see if there are other factors that has impacted the success of the company.

In the result of the thesis it shows that there are factors where the studied companies have followed the theoretical approaches. But there are also other factors that are important to consider. In the theory part of the thesis the authors put together a research model based on other authors theories on what a small internet based company should think of. With the research model as a base the founders of three small internet based companies were interviewed. From these interviews the authors discovered that there are other important factors that the theory did not bring up. One of those factors is personal engagement which is strongly linked with the personal freedom that you get from running your own Internet based company. Other essential factors that were found are the development of distributor contacts and having a good customer focus.

• 90.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Samkörning av databaser-Är lagen ett hinder?2006Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Title:Comparison of databases – Is the law an obstacle?

Authors:Alexander Ankarberg, Applied Information Science.

Tutors:Lars- Eric Ljung

Problem: Cross running databases is getting more and more significant during the development of the information flow. There are huge benefits if we start to use the technique that already exists. The law is today an obstacle, so what would happen if the law wasn’t so stern. My question is:” why don’t we cross run databases more efficient between parts of institutions”

Aim:The purpose of this essay is to evaluate why institutions does not cross run databases and start a discussion. There are possibilities that we today does not use. One aim is also to find solutions so that we can start to use the techniques. The essay will explain the fundamentals and discuss both the advantages and the disadvantages in depth.

Method:The author has approached the problem from two ways. From induction and deduction which combined is abduction. The author hopes that this results in as many points of angles as possible. And the answers will be as complete as possible. The essay also includes an inquiry which is based on interview with ordinary people.

Conclusions:The law is not up to date nor made for today’s technique. It is in some ways an obstacle for a more efficient system and it could save enormous amounts of money for both the government and common man. There is hope though, and small revolutions happen every day. There is also ways to go around the law and make things possible and make the system more efficient. That is with agreement from the person that the information is about. There is also one possibility with safety classes, to put a number on information.

• 91.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
SMS, en lösning på Apotekets väntetider?: Kan ett informationslogistiskt synsätt vara en bas för effektivisering?2006Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Nowadays long waiting time exists at the Pharmacy related to handle prescription.

In the beginning of the study we related on our own experiences and valuations. There for this report could be consider as a result of our interst.

The prescriptions constitute about three quarters of the Pharmacy´s sale. The size of the sales margin for these products is the trade margin that decider how the Pharmacy´s prin-ciple adjusts to the conditions of the market.

The Pharmacy intends to short the waiting time to max 5 minutes within 3 years. Further-more they will increase their opining and closing times. The Pharmacy goals is to increase the number of Pharmacy from 870 to 1000.

In our examination we notice that the customers we met adjusted their visit to a specific time when the waiting time is short, they also avoid Pharmacy´s that are greater loaded. In our study we calculate that the reduction of the number of repliers are totaly 7 %. The study of the questionnaire are the base of our thesis.

In a contribution to a discussion from Svenska Dagbladet the 8 th of the July 2005 the Pharmacy´s MD Stefan Carlsson point out that they will work harder to reduce their wait-ing times.

We have adjusted our SMS solution on the long waiting time at the Pharmacy after a study on the target group in the age of 16-74 years. The informations we have gathered cames from Statistiska Centralbyrån (SCB).

In our growing community there almost everyone owns a mobile phone, which contributes to a more frequent use of Short Message Service (SMS).

We were hoping that our responders would have the same opinion as we regarding the waiting time at the Pharmacy. In our study we saw that many of the responders considered that the waiting time were to long in general.

To handle the information and to handle information logistic aren’t new. It’s a further de-velopment of that which have been a central source of information in many enterprises. In many cases an effective information flow has a directly ruling part in the existents of the ac-tivity and its ability to conquer a global market.

• 92.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Implementering av EtherCAT i robotsystem Motoman NX1002008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

With a fast growing production industry in Asia it’s getting harder and harder for Swedish companies to compete with the low production cost that the east offers. To be more competitive robot solutions are used more and more. This is a report of a first concept to implement a new Ethernet based communication called EtherCAT, in one of Motoman robot controllers. Test equipment has been constructed and simulated a communication with the PLC. A first HMI interface has been written to show the information from the PLC in a way that is understandable for humans. For one of Motoman’s robots a program has been prepared.

• 93.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Betygsättning i matematik: en kvalitativ studie om hur styrdokumenten tolkas2007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Denna rapport har sin utgångspunkt i att förkunskaperna hos studenter inför högskolestudier är bristfälliga och på grund av det även i misstankarna om en betygsinflation på gymnasieskolan. En undersökning med syftet att utreda hur betyg sätts, utförs där tre lärare konstruerar varsin bedömningsmall till ett nationellt prov i Matematik C. Dessa mallar jämförs med Skolverkets mall och betygskriterierna. Dessutom förs intervjuer med lärarna om hur de hanterar betygsättningen av hela kursen. Intervjusvaren kontrolleras mot gällande styrdokument. Slutsatsen av undersökningen är att våra styrdokument är alldeles för svåra att tolka och beroende på hur man tolkar dem, får man olika resultat. Ofta tolkas de för ”snällt”, vilket leder till att för höga betyg sätts. Det framkom också att lärarna generellt satte högre betygsgränser på det nationella provet än vad Skolverket gjorde. Slutsatsen av det är att lärarna tycker att Skolverkets krav på de nationella proven är för låga. Utifrån teorin framgick det också att gymnasieskolan är utsatt för en betydande betygsinflation.

• 94.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Elevers matematiska tankar: - en kvalitativ studie av känguruppgifter på gymnasiet2007Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Att förstå, och ta tillvara elevernas tankar är mycket viktigt för elevernas utveckling inom matematiken. Matematikundervisningen ska möta och utveckla elevernas uppfattningar om matematik. Som lärare blir det därför viktigt att undersöka hur elever tänker. Varje år finns det möjlighet att delta i en matematiktävling vid namn Kängurutävlingen. Tävlingen är inget prov utan ska ses som ett utbud av intressanta matematikproblem som ska väcka lust och nyfikenhet för matematik. Vid 2006 års Kängurutävling samlades omfattande svarsmaterial in från tävlingen. I detta material fanns det enligt Nationellt centrum för matematik intressanta svarsmönster som var värda att följa upp. Med anledning av detta valde jag att studera resultatet från motsvarande tävling innevarande år. I examensarbetet har jag valt att studera om det finns någon koppling mellan elevers Matematik A betyg och resultatet på utvalda känguruppgifter. För att kunna uppnå mitt syfte valde jag att genomföra uppgifterna i en klass för att sedan intervjua eleverna om hur de gått till väga för att lösa uppgifterna. Resultatet visade att många elever har svårt för att lösa uppgifter som inte är rutinuppgifter och att elevernas betyg inte överensstämde med det poängantal de fick på de valda känguruppgifterna. En trolig orsak till resultatet är att eleverna inte är vana vid uppgifter där de själva behöver tänka kreativt.

• 95.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Den röda tråden?: En stadieövergripande studie av teknikundervisningen i grundskolan.2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis

Tanken med detta examensarbete var att undersöka om det finns någon ”röd tråd” i grundskolans teknikundervisning. Som teoretisk utgångspunkt har jag tagit en rapport från Teknikföretagen, som visar en relativt dyster bild av svensk teknikundervisning i grundskolan. Därefter har jag genomfört en egen kvalitativ studie där jag har intervjuat fyra lärare och studerat berörda skolors lokala arbetsplaner, för att djupare kunna undersöka vilka faktorer som faktiskt styr och påverkar teknikundervisningen på skolor i närområdet. Studien är stadieövergripande från förskoleklassen och upp till grundskolans år 9. Studiens resultat stämmer tyvärr relativt väl överens med den rapport som Teknikföretagen presenterat, men kan på ett mer kvalitativt sätt på lokal nivå, visa bakomliggande orsaker och personliga åsikter till varför resultatet ser ut som det gör – att den ”röda tråden” i grundskolans teknikundervisning faktiskt är ganska svår att hitta.

• 96.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. matematik.
Interpolation of Approximation Spaces with Nonlinear Projectors2006In: Proceedings of the Estonian Academy of Sciences, ISSN 1406-0086, Vol. 55, no 3, p. 146-149Article in journal (Refereed)
• 97.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. matematik.
Invertibility of Operators in Spaces of Real Interpolation2008In: Revista Matematica Complutense, ISSN 1139-1138, Vol. 21, no 1, p. 207-217Article in journal (Refereed)
• 98.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering.
Regularization Theory and Real Interpolation2008Conference paper (Other (popular science, discussion, etc.))
• 99.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. matematik.
Interpolation of Besov and Sobolev Spaces in the Non-Diagonal Case2006In: Constructive Theory of Functions: Proceedings of International Conference, Varna, 2006, p. 45-50Conference paper (Refereed)
• 100.
Växjö University, Faculty of Mathematics/Science/Technology, School of Mathematics and Systems Engineering. matematik.
Interpolation of Besov Spaces in the Non-Diagonal Case2006In: Algebra and Analysis, ISSN 1061-0022, Vol. 18, no 4, p. 1-9Article in journal (Refereed)
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