Syftet med denna studie har varit att undersöka hur olika ordföljdsprinciper i ett förstaspråk påverkar inlärningen av ordföljden i andraspråket svenska. Två grupper jämfördes där den ena hade ett förstaspråk med en bunden ordföljd baserad på den grammatiska principen och den andra ett förstaspråk med en fri ordföljd baserad på tema-rema-principen. Respondenterna bestod av elever inom den kommunala vuxenutbildningen i en västsvensk kommun som gick och läste på Sfi och SAS Grund. Varje respondent fick i uppgift att fritt skriva en kort uppsats. Texterna analyserades därefter ingående för att kunna identifiera vilka sats- och textgrammatiska ordföljdsfel som hade gjorts. Resultatet visade att de båda grupperna gjorde ungefär samma typ av satsgrammatiska fel men att gruppen med ett förstaspråk med fri ordföljd gjorde något fler textgrammatiska fel. Medan flera andra studier lyfter fram övergeneralisering av tema-rema-principen som det största problemet ur textgrammatisk synvinkel för denna senare grupp, fann jag att det snarare var underanvändning av tema-rema-principen som var problematiskt. / The purpose of this study was to examine how different word order principles in a first language influence the learning of word order in Swedish as second language. Two groups were compared in which one had a first language with a bound word order based on the grammatical principle and the other a first language with a free word order based on the topic-comment-principle. Respondents consisted of students in municipal adult education in a western Swedish municipality who studied at SFI and SAS Basic. Each respondent were asked to freely write a short essay. The texts were then analyzed in detail to identify which batch- and text grammatical word order inaccuracy that had been made. The results showed that both groups did about the same type of grammatical errors, but that the group with a first language with free word order did some more text grammatical errors. While several other studies highlight the generalization of the topic-comment-principle as the biggest problem for this latter group, I found that it was rather the lack of use of the topic-comment-principle that was problematic.

L'objectif de cette thèse est de créer de nouveaux mélanges thermoplastiques présentant une processabilité accrue comparée à des matrices thermoplastiques hautes performances utilisées dans l'industrie aéronautique. Ces matériaux ont vocation à être intégrés en atmosphère avionique pressurisée. Afin de combler le cahier des charges imposé par le domaine aéronautique, le choix des matériaux s'est porté sur un mélange incompatible de polyétheréthercétone PEEK et de polymères à cristaux liquides LCP présentant une morphologie fibrillaire développée grâce à des conditions particulières d'écoulement lors de la mise en oeuvre.Dans un premier temps, les propriétés rhéologiques des matériaux sont caractérisées de manière à confirmer le respect des spécifications relatives à leur processabilité. La compréhension des phénomènes régissant la baisse de viscosité du mélange permet d'assurer la répétabilité et la reproductibilité des performances rhéologiques en vue d'un transfert industriel. L'étude se concentre ensuite sur les propriétés de cristallinité des mélanges, qui permettent de déterminer que la présence de deux matériaux semi-cristallins au sein d'une même structure ne perturbe pas leurs propriétés de cristallinité garantes de leurs performances thermomécaniques.Enfin, une campagne de caractérisation complète est effectuée afin de dresser une fiche matière et de la comparer aux spécifications exigées par l'industrie aéronautique. / The aim of this thesis is to create new thermoplastic blends exhibiting improved processability incomparison with high performance aeronautical thermoplastics. These materials are dedicated tointegrating pressurized avionic structures.To reach the specific aeronautical specifications, an incompatible polymer blend made ofpolyetheretherketone PEEK and liquid crystalline polymers LCP is chosen. The particular flow conditionsset for the compounding ensure the blend a fibrillar morphology.First, the material rheological properties are characterized so as to confirm that the processabilityspecifications are met. The viscosity drop causes are explained and grant the maintaining of therheological performances in any processing configuration.The study then focuses on the blend crystallinity properties in order to determine whether two interlinkedsemi-crystalline structures do not impede the thermomechanical performances.At last, a characterization campaign is led to compare the blend performances with the demandedaeronautical specifications.

The aim of this study was to investigate the morphosyntactic development of Grundvux learners (adult learners who study school subjects at elementary school levels in Sweden) of English with the aid of Processability theory, or PT, and to investigate the potential influence of exposure to English outside school and the participants' highest completed formal education on the participants' morphosyntactic levels. The participants of this study were Grundvux learners who studied English either on National Course 2, 3, or 4. This study also investigated how similar or different Course 2, 3 and 4 participants were when it comes to their highest attained PT-levels. The participants described a picture series and answered questions about their highest completed education from their home countries and how much they tend to be exposed to English on a weekly basis outside school. The results show that Course 2, 3 and 4 participants have both similarities and differences regarding their highest attained PT-levels. The results also show that there could be a possible connection between educational background and morphosyntactic development, i.e. that educational background can have a solid influence on morphosyntactic development. Furthermore, this study shows that a connection between exposure to English outisde school and morphosyntactic development is not likely. Yet, more research with more participants and tasks with different instructions are needed to draw definitie conclusions about the effects of exposure to English outside school and highest completed education on learners' morphosyntactic development. Lastly, this study provides some information to in-service teachers about what morphosyntactic structures to teach and when based on the learners' highest attained PT-levels.

<p>This dissertation examines direct and subordinate questions, as well as verb morphology in L2 Swedish, from a developmental perspective. The study is cross-sectional, containing data from Iraqi Arabic, Persian and Somali adolescent learners representing three different levels of proficiency. The data are analysed on the basis of two theories: The Markedness Differential Hypothesis and Processability Theory. Data elicited through four different techniques are examined with the aim of examining the possible impact of different data types on the results. The different elicitation techniques used in the study are: oral production, written production, grammaticality judgement and a receptive skills task. Two of the elicitation techniques, written production and grammaticality judgement, include all three structures in focus in the study, whilst the oral production and the receptive task is centred on direct questions.</p><p>The results suggest that there are implicational relationships regarding the order in which the grammatical structures are acquired. On the whole, predictions based on the two theories used as a basis for the analyses find support in the material. Having a wide scope for predictions at the morpho-syntactical level, the results meet the claims in particular of Processability Theory. The predictions and the results do not contrast the two theories with each other. A comparison of the different data types clearly indicates that the grammaticality judgement task substantially diverges from the other data types providing less consistent data and exhibiting trends that are in conflict with the data obtained through the three other elicitation techniques.</p>

This dissertation examines direct and subordinate questions, as well as verb morphology in L2 Swedish, from a developmental perspective. The study is cross-sectional, containing data from Iraqi Arabic, Persian and Somali adolescent learners representing three different levels of proficiency. The data are analysed on the basis of two theories: The Markedness Differential Hypothesis and Processability Theory. Data elicited through four different techniques are examined with the aim of examining the possible impact of different data types on the results. The different elicitation techniques used in the study are: oral production, written production, grammaticality judgement and a receptive skills task. Two of the elicitation techniques, written production and grammaticality judgement, include all three structures in focus in the study, whilst the oral production and the receptive task is centred on direct questions. The results suggest that there are implicational relationships regarding the order in which the grammatical structures are acquired. On the whole, predictions based on the two theories used as a basis for the analyses find support in the material. Having a wide scope for predictions at the morpho-syntactical level, the results meet the claims in particular of Processability Theory. The predictions and the results do not contrast the two theories with each other. A comparison of the different data types clearly indicates that the grammaticality judgement task substantially diverges from the other data types providing less consistent data and exhibiting trends that are in conflict with the data obtained through the three other elicitation techniques.

Denna studie bygger på andraspråksinlärares skriftliga kompetens kopplad till syntaktiska och kommunikativa nivåer. I synnerhet är syftet att studera språkliga syntaktiska nivåer i texter skrivna av andraspråksinlärare som har behörighet att studera vid universitet. Ytterligare ett syfte är att studera om innehållet i texter kan förmedlas på ett kommunikativt och idiomatisk sätt. Den teoretiska ramen för att mäta syntaktiska nivåer som informanter i denna studie har uppnått bygger på processbarhetsteorin (Pienneman, 1998/ Pienneman &amp; Håkansson, 1999). Studien visar att godkända texter i Svenska som andraspråk B och Tisustest uppnår nivå 4 och 5 på syntaktisk nivå.   Studien visar också på variation av kommunikativ kompetens utifrån förmågan att förmedla ett central innehåll. Informanterna uppnår delvis målspråksnormen och delvis avviker från målspråksnormen i varierad grad vilket påverkar den kommunikativa kompetensen. Det mesta av resultatet pekar på individuella skillnader. Vad som kan förklara skillnader mellan informanterna kan delvis kopplas till varierad kognitiv svårighetsgrad i texterna. Studien visar att processbarhetsteorin kan vara ett fördelaktigt verktyg för att mäta syntaktiska nivåer i texter. Dock pekar studien på att det är av vikt att också genomföra en mer omfattande bedömning av kommunikativa språkkunskaper för att kunna göra en helhetsbedömning av skriftlig språkkompetens av andraspråksinlärare. / The present study concerns second language learners' syntactic and communicative competence in writing. The aim is to study syntactic performances in texts written by learners of Swedish as a second language permitted to study at university. Another aim is to discuss the communicative and idiomatic performances of the informants.   The theoretical framework used for assessment of achieved syntactic levels is the Processability Theory (Pienneman, 1998/Pienneman &amp; Håkansson, 1999). The results reveal that the students who´s texts in Svenska som andraspråk B[1]and the Tisustest[2]have passed the exam have achieved either syntactic level 4 or 5 according to Processability Theory.    The study also reveals the variety of communicative and idiomatic competence based on the ability to convey a core content. The informants partly achieve and partly do not achieve the Swedish language norms, in various degrees, which effects the level of communicative competence which they are able to express. The results point to more or less individual differences. There are small differences between the group of informants in Svenska som andraspråk B and in the Tisustest. Possible causes for these differences may partly be connected to the varying degree of cognitive difficulty in producing the different texts.   The study shows that the use of Processability Theory may be a beneficial tool to measure levels of syntactic proficiency levels in second language learner texts. However, it appears that it also is important to establish a comprehensive assessment of communicative language skills in order to make an overall assessment of written language skills of second language learners. [1]Swedish as a second language, level B [2]Tisus - Test in Swedish for university studies.

This dissertation concerns oral language tests from a grammatical perspective. Tests today are usually assessed based on a communicative approach to language, so it is interesting to see how great a significance the level of grammatical development of test takers has for their communicative competence in general. The data in the investigation consist of recorded test conversations from a Swedish national language proficiency test, Tisus (test in Swedish for university and university college studies). The general aim of the study is to investigate whether there is a difference between the test takers who passed and those who failed in terms of their level of grammatical development. This is investigated in one main study and two smaller follow-up studies. The theoretical basis for this work is comprised of theories on second language learning and theories on language testing. For the grammatical analysis, Pienemann’s processability theory (PT) is applied. This theory posits that learners acquire certain morpho-syntactic structures in a particular order, something that produces a hierarchy consisting of five levels. In the main study, a quantitative analysis is made of the test takers’ level of grammatical development relative to their TISUS results. The results show a clear correlation between grammatical level and test results. There also seems to be a kind of watershed at level 4, given that most of the test takers who passed have command of this level in the PT hierarchy, whereas those who failed, as a rule, only make it to level 3. The first follow-up study is more qualitative in nature and is focused on the test takers who deviate from the general pattern of results in the main study: those who failed despite their high grammatical level and those who passed despite their low grammatical level. One result of this follow-up study is that, in these cases, it appears communicative competence was critical. Being able to orient oneself to the special conversational situation represented by the test conversation is considered to be particularly important. In a second follow-up study, the problems of applying PT to morphology and syntax are examined. The results of the dissertation suggest that there is a correlation between grammatical competence and communicative competence in general. This means that the grammatical levels in the PT hierarchy may constitute a useful basis of analysis in oral assessments, as a complement to other assessment tools.

An ongoing debate within the field of Second Language Acquisition (SLA) discusses the possibility of universal developmental stages in the interlanguage of second language learners. Processability Theory (PT) is one of the theories that enhances this way of thinking about second language acquisition. The belief is that learners go through the same stages of development when learning a new language. An ongoing process in PT is the construction of these developmental stages for individual languages, but today there is still much work needed in this area. The purpose of this thesis is to construct the developmental stages for Dutch, based on an error analysis of second language learners’ interlanguage. The data was collected from Swedish students learning Dutch on a university level. The students were interviewed once per month, and three times in total, so that no developments in their interlanguage could be missed. The data is processed according to the emergence criterion, resulting in developmental tables of the learners’ progress. The result of these interviews provides for the outline on how one acquires Dutch, and together with a grammatical analysis of Dutch word order procedures and morphology, a developmental hierarchy for the acquisition of Dutch according to PT is constructed. / I den här studien undersökas den nederländska språkinlärningsprocessen inom ramen av Processbarhetsteorin (PT). PT antar att inlärningsprocessen sker genom universella stadier. Dessa har skapats och forskats för flera olika sprak, men inte för nederländska. I den här uppsatsen kommer den nederländska morfologin och ordföljden att analyseras enligt PT’s stadier, och skapas en hierarki för nederländska. Samtidigt blir hierarkin testad genom en longitudenell studie av inlärningsprocessen av svenska studenter som lär sig nederländska. Dessutom diskuteras frågan om möjlig transfer från både det första och andra språket. Sen debatteras frågan om emergence criterion och procentsatser, och därmed skillnaden mellan språkinlärning och språkbehärskning. Resultatet är en granskning av den egna skapade hierarkin, och möjliga förklarningar för deras inlärningsprocess.

This thesis is about laser powder bed fusion (L-PBF) of the nickel-based superalloy: Alloy 247LC. Alloy 247LC is used mainly in gas turbine blades and processing the blades with L-PBF confers performance advantage over the blades manufactured with conventional methods. This is mainly because L-PBF is more suitable, than conventional methods, for manufacturing the complex cooling holes in the blades. The research was motivated by the need for academia and industry to gain knowledge about the processability of the alloy using L-PBF. The knowledge is essential in order to eventually solve the problem of cracking which is a major problem when manufacturing the alloy. In addition, dense parts with low void content should be manufactured and the parts should meet the required performance. Thus, the thesis answered some of the important questions related to process parameter-microstructure-defect relationships. The thesis presented an introduction in chapter 1. A literature review was made in chapter 2 to 4. In chapter 2, the topic of additive manufacturing was introduced followed by an overview of laser powder bed fusion. Chapter 3 focused on superalloys. Here, a review was made from the broader perspective of superalloys but was eventually narrowed down to the characteristics of nickelbased superalloys and finally Alloy 247LC. Chapter 4 reviewed the main research on L-PBF of Alloy 247LC. The methodology applied in the thesis was discussed in chapter 5. The thesis applied statistical design of experiments to show the influence of process parameters on the defects and microstructure, so a detail description of the method was warranted. This was given at the beginning of chapter 5 and followed by the description of the L-PBF manufacturing and the characterization methods. The main results and discussions, in chapter 6, included a preliminary investigation on how the process parameters influenced the amount of discontinuity in single track samples. This was followed by the results and discussions on the investigation of voids, cracks and microhardness in cube samples (detail presentation was given in the attached paper B). Finally, the thesis presented results of the microstructure obtainable in L-PBF manufactured Alloy 247LC. The initial results of the microstructure investigation were presented in paper A.

Over the past decade, the bottom-up synthesis of structurally defined graphene nanoribbons (GNRs) with various topologies has attracted significant attention due to the extraordinary optical, electronic, and magnetic properties of GNRs, rendering them suitable for a wide range of potential applications (e.g., nanoelectronics, spintronics, photodetectors, and hydrothermal conversion). Remarkable achievements have been made in GNR synthesis with tunable widths, edge structures, and tailor-made functional substitutions. In particular, GNRs with liquid-phase dispersibility have been achieved through the decoration of various functional substituents at the edges, providing opportunities for revealing unknown GNR physiochemical properties. Because of the promise of liquid-phase dispersible GNRs, this mini-review highlights recent advances in their synthetic strategies, physiochemical properties, and potential applications. In particular, deep insights into the dvantages and challenges of their syntheses and chemical methodologies are provided to encourage future endeavors and developments.