Model formulas are the standard approach for specifying the variables in statistical models in the S language. Although being eminently useful in an extremely wide class of applications, they have certain limitations including being confined to single responses and not providing convenient support for processing formulas with multiple parts. The latter is relevant for models with two or more sets of variable, e.g., regressors/instruments in instrumental variable regressions, two-part models such as hurdle models, or alternative-specific and individual-specific variables in choice models among many others. The R package Formula addresses these two problems by providing a new class "Formula" (inheriting from "formula") that accepts an additional formula operator | separating multiple parts and by allowing all formula operators (including the new |) on the left-hand side to support multiple responses. / Series: Research Report Series / Department of Statistics and Mathematics

The study is an in-depth examination of code-switching in the Logoli speech community in the cosmopolitan Kangemi informal settlement area on the outskirts of the city of Nairobi. The aim of the study is to investigate the sociolinguistic and structural developments that result from urban language contact settings such as Kangemi. The main objective is to identify and illustrate the social motivations that influence the tendency of the Logoli speakers to alternate codes between Lulogoli, Kiswahili and English in the course of their routine conversations as well as the structural patterns that emerge in the process of code-switching. Various methodological techniques were used in the gathering of data, including questionnaire surveys, oral interviews, tape recordings and ethnographic participant-observation techniques are highlighted. Extracts from the corpus were analysed within a theoretical framework based on two models, namely the Markedness Model and the Matrix Language Frame Model, both developed by Myers-Scotton. The study identified and interpreted, within the Markedness Model framework, the key social variables that determine code-switching behaviour among the Logoli speech community. These include age, education, status and the various social domains of interaction. In the light of these factors, the researcher was able to explain the tendency to switch codes in different settings and confirm the study’s assumption that urban-based social factors largely determine the motivations for and the patterns of code-switching. This lead to the conclusion that code-switching is not a random phenomenon but a strategy and a negotiation process that aims at maximizing benefits from interaction. Structural features of the corpus were also identified and analysed within the Matrix Language Frame Model. The assumptions of the model were tested and found to be supported by numerous examples from the data. A number of recommendations were made for further research on minority languages in Kenya and the need for language policy in Kenya to be formulated to take these language groups into consideration. / Linguistics and Modern Languages

Zunächst wird ein Überblick über berufliche Herausforderungen für Menschen in der modernen Produktentwicklung (-> Industrie 4.0) gegeben. Anschließend wird ein allgemeines Rahmenmodell beschrieben, in dem (nicht nur) psychologische Faktoren dargestellt werden, die menschliches Fühlen, Denken und Handeln beeinflussen. Im dritten Abschnitt wird ein Blick über den Tellerrand geworfen: In der Luftfahrt sind sogenannte Crew Resource Management Seminare für Besatzungen von Verkehrsflugzeugen gesetzlich verpflichtender Teil der Personalentwicklung und Weiterbildung. Es wird der Frage nachgegangen, in wieweit Zielsetzung und Inhalte dieser Seminare auf das Setting und die Bedürfnisse eines in der modernen Produktentwicklung tätigen Menschen übertragen werden können. Diese Überlegungen münden in den Ansatz des sogenannten Personal Resource Management, der den in der Produktentwicklung tätigen Menschen dabei unterstützen kann, sich der ihm zur Verfügung stehenden Ressourcen bewusst zu werden und Wege zu finden, diese Ressourcen in einem komplexen Umfeld zielorientiert abzurufen und ntsprechende Leistungen zu erbringen und gesund zu bleiben.

Via a systematic literature review, this thesis investigates the possible benefits of employing social media as a learning tool in English as a second language classroom. The thesis is focused on the motivation for learning, potential grammar and vocabulary gains as results of using social media at the upper-secondary level. This systematic literature review is relevant since the current Swedish upper-secondary school’s curriculum promotes technology implementation and at the same time social media has become an everyday feature of many students’ lives. In order to measure the possible benefits of social media, this thesis uses a modified version of Koole’s (2009, p. 27) The Framework for the Rational Analysis of Mobile Education (FRAME) model, which originally was used to determine the optimal way for learning on a mobile platform. This thesis adapted that model and altered it to be applicable for social media platforms instead of mobile devices. The literature review found relevant peer-reviewed studies for this topic through a scholarly education database. The age of the participants in the chosen studies vary from 15-19 years old, and all the chosen studies focus on English as a second language in relation to an education system. The reviewed studies show that social media usage is mainly beneficial for motivation to enhance English vocabulary and grammar proficiency. However, social media usage does not show any significant benefits for grammar proficiency and vocabulary gains when students engage with social media. Although motivation to partake on various social media platforms in ESL does show that students tend to have a desire to expand their ESL knowledge. This review study is in agreement with the reviewed studies regarding the potential benefits of social media for ESL. The reviewed studies on their own were inconclusive as to why social media usage was beneficial. By comparing all the studies result, this literature review thesis promotes the idea that it is the social factor from engaging with social media that is the main reason that motivates students to acquire further ESL knowledge in a school setting or extramurally. Thus, the thesis suggests that an integration of social media in the Swedish upper-secondary school should be taken into consideration due to its proven motivational benefits

My thesis investigates the universality of the Matrix Language Frame model developed by Myers-Scotton (2002). The work tests the model by using bilingual data which display code-switching between French and the low variety of Lingala. The main concern of the work is to test the constraints that are posited in terms of principles of the model and which claim that the Matrix Language dictates the morphosyntactic frame of a bilingual Complementizer Phrase (CP). In the light of the findings of this study, it was shown that the ML model failed to account for a number of situations; and such was the case of the Morpheme Order Principle and double morphology, specifically with the outsider late system morphemes.

Magister Educationis - MEd / Previous studies on the academic utilisation of mobile devices in South Africa have rendered some invaluable insights into the rationale and different ways students utilise mobile technologies in and outside the classroom. However, these studies have addressed issues about social practices of adoption in high schools that emphasise tutor-directed, instant messagingmediated supply of supplementary tuition/training in subjects like science and mathematics. Consequently, insufficient attention has been devoted to understanding the dynamic complexities of implementing mobile learning (m-Learning) projects in tertiary institutions. This research contributes to the m-Learning discourse by exploring a collaborative m-Learning perspective, through the pedagogical application of WhatsApp, a special-purpose instant messaging service implemented at a University of Technology in South Africa. This research paper argues that mobile instant messaging (MIM) may create alternative academic discussion platforms for the students’ collaborative interactions outside the classroom, which implies the transformation of pedagogical delivery. The FRAME model was utilised as the theoretical lens for this study. An interview instrument was developed based on the FRAME model constructs. Face-to-face semistructured interviews were conducted with twenty participants. The findings suggest improved academic participation, the promotion of collaborative m-Learning for critical thinking, knowledge creation and sharing, as well as fostering effective learning through student-centered approach hence liberal transformation in the lecturer’s mode of instructional delivery.

This study investigates whether code-switching practices among Sesotho-English bilinguals promote convergence between Sesotho and English. First, the study identifies different types and patterns of code-switching between Sesotho and English and analyses them using Myers-Scotton’s (1993) Matrix Language Frame model and Myers-Scotton and Jake’s (2000) 4-M model. Second, it applies the ML turnover in order to detect convergence in Sesotho-English code-switching data and to observe which direction it takes. The study also explores other factors contributing to change in the structure of Sesotho, which are not necessarily influenced by convergence. In conducting this study, data was collected through interviews that were held with younger bilingual speakers from different tertiary institutions in and around Maseru (Lesotho) and through recorded youth-centred phone-in radio programmes. Findings from the analysis of data reveal simple to complex Sesotho-English code-switching performance of various types and strategies. Findings also show through the existence of composite language in Sesotho-English code-switching that there is a turnover in the ML, which indicates a development of an asymmetrical convergence between Sesotho and English. It was also discovered that, although other changes in the Sesotho structure are not English influenced, they are enhanced mostly by younger urban bilingual speakers’ frequent “looser” approach to Sesotho. This is an indication that Sesotho’s susceptibility to change correlates strongly with age; that is, both the length of time contact between Sesotho and English has existed, and the generation in which change is mostly found. This thesis adds and documents a different perspective to the previously recorded changes on Sesotho-English contact in Lesotho.

<div>This thesis examines the multilinear equations of the calibrated pinhole camera. </div><div>The multilinear equations describe the linear relations between camera parameters and image observations in matrix or tensor formats. </div><div>This thesis includes derivations and analysis of the trilinear equations through the point feature relation. For the four-frame and more than four frame cases, this paper gives derivations and analysis using a combination of the bilinear and trilinear equations to represent general multi-frame point geometry. As a result, a three-frame model (TFM) for general multi-frame point geometry is given. This model provides a concise set of minimal and sufficient equations and minimal unknowns.</div><div> </div><div>Based on the TFM, there are two bundle adjustment (BA) approaches developed. </div><div>The TFM does not involve the object parameters/coordinates necessary and indispensable for the collinearity equation employed by BA. </div><div>The two methods use TFM as the condition equation fully and partially, replacing the collinearity equation. </div><div>One operation using both TFM and the collinearity equation is designed to engage the object structures' prior knowledge. </div><div>The synthetical and real data experiments demonstrate the rationality and validity of the TFM and the two TFM based methods. </div><div>When the unstable estimate of the object structures appears, the TFM-based BA methods have a higher acceptance ratio of the adjustment results. </div>

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Zunächst wird ein Überblick über berufliche Herausforderungen für Menschen in der modernen Produktentwicklung (-> Industrie 4.0) gegeben. Anschließend wird ein allgemeines Rahmenmodell beschrieben, in dem (nicht nur) psychologische Faktoren dargestellt werden, die menschliches Fühlen, Denken und Handeln beeinflussen. Im dritten Abschnitt wird ein Blick über den Tellerrand geworfen: In der Luftfahrt sind sogenannte Crew Resource Management Seminare für Besatzungen von Verkehrsflugzeugen gesetzlich verpflichtender Teil der Personalentwicklung und Weiterbildung. Es wird der Frage nachgegangen, in wieweit Zielsetzung und Inhalte dieser Seminare auf das Setting und die Bedürfnisse eines in der modernen Produktentwicklung tätigen Menschen übertragen werden können. Diese Überlegungen münden in den Ansatz des sogenannten Personal Resource Management, der den in der Produktentwicklung tätigen Menschen dabei unterstützen kann, sich der ihm zur Verfügung stehenden Ressourcen bewusst zu werden und Wege zu finden, diese Ressourcen in einem komplexen Umfeld zielorientiert abzurufen und ntsprechende Leistungen zu erbringen und gesund zu bleiben.