A introdução de bovinos em pastejo em áreas destinadas ao cultivo de culturas de grãos possibilita maximização de renda no sistema, contribuindo para o benefício da cultura em sucessão, quando a intensidade de pastejo é manejada adequadamente. O objetivo deste trabalho foi avaliar em um sistema de integração lavoura-pecuária, os efeitos de diferentes intensidades de pastejo, em função de quatro alturas de manejo de uma pastagem de aveiapreta e azevém anual em sucessão à cultura da soja, bem como, a influência dessas alturas sobre o desempenho animal, a variabilidade espacial do pasto e a resistência mecânica do solo à penetração. Os tratamentos consistiram das alturas de manejo de pasto de 10, 20, 30 e 40 cm; e de um tratamento sem pastejo (SP). A coleta de dados realizou-se entre julho e novembro de 2008, no município de Tupanciretã, RS, Brasil. Foram utilizados novilhos de corte, provenientes de cruzamento entre as raças Angus, Hereford e Nelore, com peso médio inicial de 203 ± 1,7 kg. Esses foram distribuídos em um delineamento experimental de blocos completos ao acaso, com três repetições, onde permaneceram em pastejo por 122 dias. As alturas médias reais, encontradas para os cinco tratamentos avaliados, corresponderam a 14,1; 22,6; 32,0; 41,1 e 45,0 cm, respectivamente. As variáveis massa de forragem, oferta de forragem e palhada residual responderam de maneira positiva e linear ao incremento da altura do pasto (P≤0,0001). O desempenho individual, o peso vivo ao abate e as características de carcaça dos novilhos apresentaram resposta quadrática, e foram otimizadas em alturas de manejo do pasto próximas a 30 cm (P≤0,0305). As menores alturas de manejo proporcionaram maiores ganhos por área, em função da maior carga animal utilizada. A presença de animais em pastejo proporcionou variabilidade espacial de alturas ao final do ciclo de utilização da pastagem. O mesmo foi observado para a resistência mecânica do solo à penetração, principalmente, nas camadas superciais do solo. Os valores de resistência evidenciaram os efeitos do pastejo até a profundidade de 0,20 m, sendo esses crescentes com o aumento das intensidades de pastejo impostas. Os resultados demonstram que alturas próximas a 30 cm permitem maiores ganhos individuais, em função do aumento da quantidade de forragem disponível por animal, não havendo comprometimento da palhada residual destinada à cultura subseqüente nesses casos, nem dos atributos físicos do solo avaliados. / The introduction of cattle into areas destined for grain crop production enables maximizing income from the system and can benefit the subsequent grain crop provided grazing intensity is managed properly. The objective of this study was to evaluate the effects of different grazing intensities on animal performance, sward spatial variability and soil penetration resistance within in a crop-livestock system. The treatments consisted of four grazing sward heights, 10, 20, 30 and 40 cm, and no grazing (NG), in a sward of black oat and annual ryegrass grown in succession with soybean. The study was conducted from May to November 2008, near Tupanciretã, RS, Brasil. Beef steers (Angus x Hereford x Nellore) with average initial weight of 203 ± 1.7 kg were distributed in a randomized complete block design, with three replications, where they grazed for 122 days. The observed average sward heights for the five treatments were 14.1; 22.6; 32.0; 41.1 and 45.0 cm, respectively. Herbage mass, herbage allowance and residual straw responded positively and linearly to increasing sward heights (P≤0.0001). Average daily gain, slaughter live weight, and carcass characteristics of the steers showed a quadratic response and were optimal in the 30 cm sward height treatment (P≤0.0305). The shorter sward heights provided higher total animal gain per area, due to the associated higher stocking rates. The presence of grazing animals resulted in spatial variability of sward heights at the end of the grazing cycle. The same was observed for soil penetration resistance, particularly in the surface layers of the soil. The soil penetration resistance showed the effect of animal traffic to a depth of 0.20 m, which increased with increasing grazing intensities. The results suggest that maintaining grazed sward heights near 30 cm provides better individual animal gains by the increasing amount of forage available per animal, while not compromising the residual straw remaining for the subsequent grain crop and without inducing excessive soil compaction.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The written Portuguese Language teaching should imply the analysis of expressive features present in each individual context. This is the need to approach writing as a process, the result of a process of reflection on language and knowledge of the constitution and functioning of the language. What should carry is a productive education for the acquisition and improvement of language skills. To achieve the objectives of this project, have been developed as primarily theoretical studies involving the following: speech genres and multimodality; portuguese language teaching from the perspective of the PCN; processes, resources and referral mechanisms. That said, in this TCF, it is made a reflection on language and its realization, starting with texts, referring expressions and situations of construction of textuality. All this culminates in the didactic proposal to provide the contact opportunity of students with referral as a discursive process of building texts, making use of activities that lead students to operate this feature. The use of referral is one of the common problems in the establishment of cohesion and coherence in texts produced by students of ninth grade. With our experience, we aim to contribute to understanding and application of such a process towards collaboration in search of resolving difficulties of teacher and student in didactic teaching approach in terms of this aspect of textual production. Along the way, we come to some very relevant clarifications. Highlighting them: on anaphora as referral process, we need to deconstruct the idea that conceives the pronoun as the only part of speech that can be constituted as anaphoric; anaphora is a textual semantic phenomenon not only coreferential (direct anaphora - cotextual) but also inferential (indirect anaphora - contextual); key is to be built significant referral chains, establishing cohesive unit through this procedure. / O ensino de Língua Portuguesa escrita deve pressupor a análise de recursos expressivos presentes em cada contexto do indivíduo. Trata-se da necessidade de abordagem da escrita como processo, fruto de um trabalho de reflexão sobre a linguagem e conhecimento sobre a constituição e funcionamento da língua. O que se deve efetivar é um ensino produtivo para aquisição e aprimoramento de habilidades linguísticas. Para consecução dos objetivos desta empreitada, foram desenvolvidos precipuamente estudos teóricos que envolveram os seguintes aspectos: gêneros de discurso e multimodalidade; ensino de língua portuguesa na perspectiva dos PCN; processos, recursos e mecanismos de referenciação. Isso posto, neste TCF, faz-se uma reflexão sobre linguagem e sua realização, partindo-se de textos, expressões referenciais e situações de construção da textualidade. Tudo isso culmina com a proposta didática de oportunizar o contato dos alunos com referenciação como processo discursivo de construção de textos, lançando mão de atividades que levem os alunos a operar esse recurso. O emprego da referenciação é um dos frequentes problemas no estabelecimento de coesão e coerência em textos produzidos pelos alunos de nono ano. Com nossa experiência, visamos a um contributo de compreensão e aplicação de tal processo no sentido de colaboração em busca de dirimir dificuldades do professor e do aluno em termos didático-pedagógicos na abordagem desse aspecto de produção textual. Ao longo do percurso, chegamos a algumas elucidações bem pertinentes. Destaquemo-las: sobre a anáfora como processo de referenciação, é preciso desconstruir a ideia que concebe o pronome como a única classe de palavra que pode se constituir como anafórica; a anáfora é um fenômeno semântico textual não só correferencial (anáfora direta - cotextual) mas também inferencial (anáfora indireta – contextual); fundamental é que se construam cadeias de referenciação significativas, estabelecendo-se unidade coesiva por meio desse procedimento.

This study is aimed at analyzing the effectiveness of state intervention in the form of pharmaceutical external price referencing (EPR) in selected EU countries, as well as the description of drug policy and EPR in the analyzed countries. Among the analyzed countries, the United Kingdom and Sweden have been selected as representatives who don't use EPR regulation. On the other hand, the Czech Republic, Hungary, Austria, Spain and the Netherlands are countries that regulate using EPR. The prices of selected pharmaceutical products in all of those states are converted into producer prices, on which most countries concentrate EPR. Prices are analyzed after the conversion of nominal and real exchange rates. The lowest prices are found in the Netherlands and the UK. This proves that EPR doesn't bring lower prices for medicine in the countries which use it. Further rankings vary based on the exchange rates used. The paper also analyzes the achievement of price ceilings in the Czech Republic, where the maximum prices set by regulators of EPR (including VAT) are compared with the average prices in pharmacies. All analyzed medicinal product prices are below the ceilings, which also proves the ineffectiveness of this intervention.

The study of indirect anaphora leads to rethink the issue of anaphoric processes used in textual productions. The very coherence shall be taken as a principle of interpretation Marcuschi (2005) and, in the interim of this assertion, the indirect anaphoras are considered important in the construction of meanings and textual progression. The indirect anaphoras as noted Marcuschi (2005) have in cognitive processes and strategies to inferentially decisive basis in the activity of textualization. The use of anaphoric processes was also present in the texts constructed by the students in the classes of the course offered at the Youth Apprentice - Senac Sergipe. However, these uses occurred in different ways for young people with different levels of education. It is in this context that we seek the theoretical linguistics textual to discuss issues such as referencing objects of discourse, indirect anaphora, the anchor, the consistency considered important in the discussion of the use of process reference. Work guided by the points of view of Marcuschi (2005), Mondada; Dubois (2003), Koch (2009), Cavalcante (2010, 2011, 2012, 2013) of the light reflected on such theoretical ratio between the greater or lesser use of anaphora and indirect schooling of learners. Before we draw primarily theoretical postulates some considerations on the historical linguistics Textual because we believe that some anaphoric processes are still in line with the theoretical discussions of the first and second phase of LT also opened space to discuss the notions of text, context and subject adopted in our work. Then we discuss the referral as discursive activity to reflect on it from the anaphora, specifically, indirect, beyond the role of anchors in the construction of coherence. In order for us are guided in identifying indirect anaphora in texts of learners adopts the proposed classificatory Marcuschi (2005) which was briefly discussed. Therefore, we point out the methodological steps followed for the analysis of texts and, finally, we analyze the productions of the learners in order to track the extent to which greater or lesser use of indirect anaphora is influenced by education level of the learners. In this context, this research is configured as qualitative, given the discursive analysis of the greater or lesser use of indirect anaphora in the corpus of the work. / O estudo das anáforas indiretas leva a repensar a questão dos processos anafóricos utilizados nas produções textuais. A própria coerência passa a ser tida como um princípio de interpretação Marcuschi (2005) e, no interim dessa assertiva, as anáforas indiretas são consideradas importantes na construção dos sentidos e na progressão textual. As anáforas indiretas como lembra Marcuschi (2005) têm nos processos cognitivos e nas estratégias inferenciais a base decisiva na atividade de textualização. O uso de processos anafóricos também se fez presente nos textos construídos pelos estudantes nas aulas do curso Adolescente Aprendiz ofertado no Senac-Sergipe. No entanto, esses usos aconteceram de distintas maneiras pelos jovens com diferentes graus de escolaridade. É nesse contexto que buscamos o aporte teórico da Linguística textual ao discutirmos questões como a referenciação, os objetos de discurso, a anáfora indireta, a âncora, a coerência considerados elementos importantes na discussão sobre o uso dos processos referencias. Trabalhamos norteados pelos pontos de vistas de Marcuschi (2005), Mondada; Dubois (2003), Koch (2009), Cavalcante (2010; 2011; 2012; 2013), à luz de tais teóricos refletimos sobre a relação entre o maior ou menor uso das anáforas indiretas e o grau de escolaridade dos aprendizes. Diante dos postulados teóricos traçamos primeiramente algumas considerações sobre o percurso histórico da Linguística Textual porque acreditamos que alguns processos anafóricos ainda estão em consonância com as discussões teóricas da primeira e da segunda fase da LT, além disso, abrimos espaço para discutirmos as noções de texto, contexto e sujeito adotadas em nosso trabalho. Em seguida, discutimos sobre a referenciação enquanto atividade discursiva para a partir disso refletirmos sobre as anáforas, especificamente, as indiretas, além do papel das âncoras na construção da coerência. No intuito de nos norteamos na identificação das anáforas indiretas nos textos dos aprendizes adotamos a proposta classificatória de Marcuschi (2005) que foi brevemente discutida. Por conseguinte, apontamos os passos metodológicos seguidos para a análise dos textos e, por fim, analisamos as produções dos aprendizes a fim de verificamos em que medida o maior ou menor uso das anáforas indiretas é influenciado pelo grau de escolaridade dos aprendizes. Nesse contexto, esta pesquisa se configura como qualitativa, haja vista à análise discursiva do maior ou menor uso das anáforas indiretas nos corpus do trabalho.

I denna uppsats undersöks det nationella provets skriftliga del i Svenska 1 och Svenska 3. Undersökningen syftar till att ta reda på hur elever hanterar källor för att se hur de är rustade för vidare studier och/eller ett liv i dagens informationssamhälle. Totalt har 40 elevlösningar genomsökts efter omarkerad avskrift, patchwriting, citat och källhänvisningar. Resultaten visar att många elever återanvänder språk från källtexterna genom att skriva av eller genom att göra mindre förändringar i källtextens språk. Denna tendens förekommer på samtliga betygsnivåer i både Svenska 1 och Svenska 3, även om patchwriting och antalet ord i avskrifter generellt minskar i takt med att betygsnivån stiger. I de fall eleverna använder citat är nära hälften felaktiga, främst på grund av korrekturfel. I både Svenska 1 och i Svenska 3 är källhänvisningarna dessutom många gånger ofullständiga. Detta gäller främst för de lägre betygsstegen, medan samtliga elevlösningar på A-nivå i båda kurser innehåller fullständiga källhänvisningar. Trots detta är det dock inte alltid tydligt för läsaren när information från källan presenteras, eftersom vissa elever inte skiljer mellan egna och andras tankar. Otydlig källanvändning förekommer endast på F- och E-nivå i Svenska 3, men i Svenska 1 förekommer det även på C- och A-nivå. / This paper examines the written national test in courses Swedish 1 and Swedish 3. The study aims to find out how students handle sources to learn how they are equipped for further studies and/or a life in today's information society. In total, 40 essays have been searched for copying, patchwriting, quotes and source references. The results show that many students reuse language ​​from their sources by copying or by making minor changes to the source language. This tendency occurs at all grades in both Swedish 1 and Swedish 3, although patchwriting and the number of words in copied strings generally decrease in the higher grades. In cases where students use quotes, almost half are incorrect, mainly because of proofreading errors. In both Swedish 1 and Swedish 3, the source references are often incomplete. This is especially true for the lower grades, whereas all essays that received A’s in both courses contain complete source references. Nevertheless, it is not always clear to the reader when information from the source is presented, as some students do not differentiate between their own and others' thoughts. Unclear source usage occurs only at grades F and E in Swedish 3, but in Swedish 1 it also occurs at grades C and A.

I present the dissertation web as a montage of a postmodern inquiry of my doctoral internship and research experiences—concerns and jubilation—positioned within the discourses of <a href="site_map2.htm#2">postmodern</a>, dissertation, academia, experimentalism and cyberspace innovations among others. I create a <a href="site_map2.htm#3">social constructionistic</a> interactive interplay, using <a href="site_map2.htm#5">hypertext</a>, among my various voices of an intern, a researcher and a person. In the dissertation web—my inquiry—I practice the characterization of postmodernism on numerous fronts—subject of study, context of study, methodology and re-presentation of the inquiry. Implicitly and explicitly, I articulate the various characterizations of postmodernism in my inquiry by challenging the traditional research practices (meta<a href="site_map2.htm#4">narratives</a>). I challenge the traditional praxis by alternate per<b>form</b>ances of research practices such as studying myself in a cultural context of an internship using the methodology of <a href="site_map2.htm#11">autoethnography</a> and performance. The <a href="site_map2.htm#5">hypertext</a> docuverse is a further characterization of postmodernism in the styles and structures that are used for re-presentation of the narratives. The styles of narration I use—such as words and graphics, prose and poetry, first person conversational texts, narratives and collages—blur the boundary of "academic" writing, literature, and art. The hypertext is intended as a <a href="site_map2.htm#6">metaphorical</a> experiential, intertextual journey of an <a href="site_map2.htm#12">intern</a> and a <a href="site_map2.htm#14">researcher</a>. Rather than a fixed structure, I create numerous structures of possible structures to privilege the readers' <a href="site_map2.htm#1">navigational</a> choices. I anticipate that the reader's choices in the virtual space might create a sense of meaning-transformation as one traverses through the dissertation web, thus, valuing <a href="site_map2.htm#8">fragmentation</a> and connection as aspects of sense-making, which are contextualized (among others) by the reader's meaning frames and my hypertextual <a href="site_map2.htm#7">performances</a>. The dissertation is submitted in three formats—exclusive dissertation web.pdf, intertextual dissertation web.pdf, and xml version. The<b> <i>exclusive dissertation web.pdf</i> </b>is a web capture in pdf format of all the "files" that compose the dissertation web created in html. The <i><b>intertextual dissertation web.pdf</b> </i> is a web capture of my dissertation along with the capture of external web resources that contextualize my dissertation web, thus illustrating the intertextuality of hypertexts by making the dissertation part of the larger textual web. Due to the web capture, the "docuverse" is nonlinear and the pages do not follow any particular or author predefined sequences. So, <i>please use the internal links or the bookmarks to read or browse the dissertation web</i> rather than scroll from the first "page" to the last "page" of the pdf formatted docuverse. The third version in xml will be made available at a later date. An html version of the dissertation is available directly from the researcher-author. CAUTION! The links from the abstract may be broken due to archiving of the dissertation web. / Ph. D.

This study set out to develop a framework within which the use of Geographical Information Technologies (GITs) can be enhanced in Road Infrastructure Maintenance (RIM) in Uganda. Specifically it was guided by 3 objectives; 1. To assess the gaps in the use of GITs for RIM in Uganda and the limitations to accessing these technologies, 2. To develop a methodological framework to enhance the use of GITs in RIM and 3. To develop a Geographical Information Systems for Transportation (GIS-T) data model based on the road maintenance data requirements. A participatory approach through a series of interviews, focus group discussions, workshop &amp; conferences, document reviews, field observations &amp; measurements and GIS analysis were employed. Based on the Spatial Data Infrastructure (SDI) concept and the principle of Causality, the gaps and limitations were established to mainly be concerned with data and organisational constraints as opposed to technical issues. They were classified to include; inadequate involvement of GITs in organisational activities, inappropriate institutional arrangements, absence of data sharing frameworks, budget constraints, insufficient geospatial capacity, digital divide in the perception, adoption &amp; affordability of GITs among the stakeholders and the absence of a road maintenance Spatial Data Infrastructure (SDI). A methodological framework, comprising of 6 strategic components was developed to enhance the use of GITs in RIM. This included enactment of relevant policy components to guide GIT use, continuous capacity building, establishment of a road maintenance SDI, fostering collaboration and spatial data sharing frameworks, budgetary allocation based on defined activities inclusive of GIT initiatives, and adoption of a dynamic segmentation data model. Conceptual and logical data models were developed and proposed for the Sector. The conceptual model, presented using an entity relationship diagram, relates the road network to the point and line events occurring on it. The logical object relational model developed using the ESRI provided template represents the road and the point and line events in a total of 19 object classes. The Study concludes that in order to ground GIT benefits in the sector; technical, data and organisational concerns involved in GIT undertakings should be accorded equal emphasis. Institutionalisation and diffusion of GITs as aspects of the component strategies are regarded capacity building mechanisms earmarked to boost success in GIT initiatives. Further research on diffusion and funding models for GIT initiatives is recommended. It is suggested that aspects of the proposed model be considered when establishing GIT standards for the sector. The RIM sector is encouraged to embrace Science and Technology and to participate in Research and Development and particularly to adopt the culture of innovation considering the ready availability of off the shelf equipment, freeware and open source software that can foster informed decision making.

Cette thèse propose une analyse de la contribution de ressources linguistico-énonciatives et textuelles pour la construction du sens et de l‘argumentation dans des productions écrites en portugais d‘élèves de l‘enseignement secondaire général de deux écoles mozambicaines : École Secondaire de Moamba et École Secondaire Josina Machel de Maputo. Justifiée par une nette survalorisation, dans l‘enseignement secondaire mozambicain, d‘une vision rhétorique de construction de l‘argumentation (thèse-arguments) au détriment d‘une vision sémantico-pragmatique basée sur des ressources linguistico-discursives, cette étude vise à apporter une contribution théorique et analytique, en cherchant à inciter les enseignants à prendre en compte la complexité de ces ressources dans leur approche de l‘argumentation, aussi bien dans leur propre formation que dans leur activité d‘enseignement. Du point de vue théorique, l‘étude s‘inscrit au sein des Théories de l‘argumentation dans le discours et s‘appuie sur des études centrées sur des aspects linguistiques (indices de l‘oral, richesse lexicale, structures syntaxiques et morphosyntaxiques), énonciatifs (subjectivité, polyphonie, deixis, modalités linguistiques) et textuels (reprises anaphoriques, progression thématique, connectivité, référenciation et organisation textuelle). Les analyses effectuées nous mènent à la conclusion que dans l‘enchaînement de thèses et arguments pour la construction de l‘argumentation participent et collaborent des ressources linguistiques, énonciatives et textuelles diverses que l‘étude de l‘argumentation ne peut négliger, surtout dans un contexte d‘enseignement spécifique, comme nous semble être le cas de l‘école mozambicaine. Parallèlement, les analyses nous permettent de constater qu‘il existe des caractéristiques particulières de la production écrite issue de chacun des deux établissements scolaires étudiés. Il s‘avère qui ces caractéristiques découlent du profil sociolinguistique des élèves. / This thesis proposes an analysis of the contribution of linguistic, declarative and textual resources to the construction of meaning and argumentation in Portuguese written texts by students in two Mozambican secondary schools: Moamba Secondary School and Josina Machel Secondary School in Maputo. The choice of this subject of study is justified by the manifest overvaluation of rhetorical vision of the construction of argumentation (thesis-arguments) to the detriment of a semantic-pragmatic vision based on linguistic-discursive resources in the Mozambican secondary education. Therefore, this study aims to give a theoretical and analytical contribution, seeking to encourage teachers to take into account the complexity of these resources in addressing argumentation, both in their own training as well as in their teaching career. Theoretically, the study fits in the Argumentation Discourse Theories and it is based on previous studies on linguistic aspects (contents of the oral, lexical repertoire, syntactic, morphological and syntactic structures), declarative (subjectivity, polyphony, deixis, linguistic modalities) and textual (recoveries anaphoric, thematic progression, connectivity, referencing and textual organization). The analyses made here lead to the conclusion that in the thread of theses and arguments for the construction of argumentation participate and collaborate with sets of declarative, linguistic and textual resources which cannot be neglected in the study of argumentation, especially in a specific education context, which seems to be the case in the Mozambican school. At the same time, the analyses show that there are individual characteristics of written text production in each of the schools studied, which seem to stem from the sociolinguistic profile of the students. / A presente tese propõe uma análise do contributo de recursos linguístico-enunciativos e textuais para a construção de sentido e da argumentação em produções escritas em português de alunos do ensino secundário geral de duas escolas moçambicanas: Escola Secundária de Moamba e Escola Secundária Josina Machel de Maputo. Justificado pela manifesta sobrevalorização, no ensino secundário geral moçambicano, duma visão retórica de construção da argumentação (tese-argumentos) em detrimento duma visão semântico-pragmática baseada em recursos linguístico-discursivos, este estudo pretende dar um contributo teórico e analítico, procurando incitar os professores a tomarem em conta a complexidade desses recursos na abordagem da argumentação, tanto na sua própria formação como na sua actividade docente. Do ponto de vista teórico, o estudo enquadra-se em Teorias da argumentação no discurso e apoia-se em estudos sobre aspectos linguísticos (índices do oral, riqueza lexical, estruturas sintácticas e morfo-sintácticas), enunciativos (subjectividade, polifonia, deixis, modalidades linguísticas) e textuais (retomas anafóricas, progressão temática, conectividade, referenciação e organização textual). As análises efectuadas conduzem-nos à conclusão de que no encadeamento de teses e argumentos para a construção da argumentação participam e colaboram recursos linguísticos, enunciativos e textuais diversos que o estudo da argumentação não pode negligenciar, sobretudo num contexto de ensino específico, como parece ser o caso na escola moçambicana. Paralelamente, as análises permitem-nos constatar que existem características particulares da produção escrita de cada um dos estabelecimentos de ensino estudados, que decorrem do perfil sociolinguístico dos alunos.

This dissertation focuses on the sub-national impact of foreign aid on civil conflicts by asking the question: How does foreign aid committed to contested areas affect the intensity of violence in those areas? The main theoretical contribution is to focus on how aid influences warring parties’ decisions to engage in contests over territorial control and how that in turn influences violence intensity. The study introduces two concepts: funding concentration and barriers to exploiting aid. A contested area has greater concentration of funding if warring parties expect a high value of aid to be distributed to only a few locations. Funding is instead diffused if the parties expect aid to be spread over many locations. A low barrier to exploiting aid is present if it is of a type that both state and non-state actors could potentially misuse. There is a high barrier if territorial control is required in order to exploit funding channels. The theory introduces three testable implications: First, greater funding concentration encourages conventional contests over territorial control, which increases military fatalities. The second proposal is that if there is a low barrier to exploiting aid (e.g. humanitarian and food aid) then there will be increased competition between warring parties and civilians, and hence more civilian fatalities. Third, high barrier funding (e.g. education aid) will motivate contests over territorial control and increase military fatalities. This dissertation uses geo-coded aid commitments data and introduces data of warring parties’ battleground control in sub-Saharan Africa, 1989–2008. The research design relies on propensity score matching where pairs of observations are matched based on a range of covariates. The results concerning barriers to exploitation are partially supported. High barrier aid increases military fatalities whereas low barrier aid has little impact on violence. Greater funding concentration increases military fatalities substantially compared to if there is low or no funding concentration. In line with theory, greater funding concentration does not increase civilian fatalities.

Future connected vehicles will be able to warn about hidden dangers already before they are visible for the driver. With sight obstructions as one of the most common factors of accident causation, there is a huge potential to improve traffic safety. However, it is unclear how to design the human-machine-interface of such systems to effectively warn drivers about invisible dangers. Especially the expectation that such warnings will be comparably unreliable lead to conflicting demands on amount and coding of warning information. Earlier work shows that warnings that contain more specific information about a hazard can improve drivers understanding of and responses to warnings but they can also raise processing costs and delay reactions or even distract drivers. Psychological theories as well as related research indicates that augmented reality (AR) has the potential to improve warning effectiveness through optimized coding of additional information. AR warnings can inherently transmit the location of a hazard and – due to the corresponding approach of the referenced display towards the driver – could increases the salience of a warning. The general aim of this work is to understand the human factors of future communication-based collision warnings. Based on a theoretical analysis revealing the most relevant questions within that context, we conducted three driving simulator studies to understand the impact of AR warning design on the effectiveness of unreliable warnings about sight obstructed dangers. To consider not only short-term effectiveness, all studies contained several necessary as well as unnecessary warnings that were analyzed in detail. The first study with 88 participants investigated the benefit of prototypical AR warnings over unspecific warnings of different modalities (visual vs. auditory). Visual AR warnings showed advantages over the other warning designs in gaze and brake reaction times, passing speeds, collision rates and subjective evaluation. Auditory AR warnings did not reveal comparable effects. The second test with 80 participants examined the contribution of different design aspects of visual AR warnings. Adding specific warning symbols or scaling animations to the warnings showed some positive but rather inconsistent effects. In contrast, spatial referencing even of an unspecific warning symbol with AR consistently improved driver’s reactions and evaluations. A third experiment with 36 participants observed the differential effects of the spatial information per se and the coding of the information with AR. The warnings had either no spatial information, symbolically encrypted spatial information or AR encrypted spatial information. A higher amount of information consistently led to stronger brake reactions, higher trust and better subjective evaluation. Additionally, with AR encryption we observed faster fixations as well as brake reactions. The present research emphasizes the importance of specificity for warnings about hidden hazards and the potential of AR especially for in-vehicle warnings of future collision avoidance systems. The systematic analysis of psychological factors of warning design and the corresponding findings on their relative contribution to driver’s behavior might also be transferred to other domains and applications of warning and information design. / In naher Zukunft werden vernetzte Fahrzeuge bereits vor sichtverdeckten Gefahren warnen können, noch bevor diese für den Fahrer sichtbar sind. Da Sichtverdeckungen bei einem Großteil schwerer Verkehrsunfälle eine Rolle spielen, stellt dies ein großes Potenzial zur Erhöhung der Verkehrssicherheit dar. Unklar ist jedoch, wie die Mensch-Maschine- Schnittstelle solcher Systeme gestaltet werden sollte, um Autofahrer möglichst effektiv vor noch nicht sichtbaren Gefahren zu warnen. Insbesondere die Vorhersage, dass solche Systeme nur eine begrenzte Zuverlässigkeit haben werden, führt zu teilweise widersprüchlichen Anforderungen an Informationsmenge und Kodierung der Warnungen. Frühere Arbeiten haben gezeigt, dass Warnungen mit spezifischen Informationen über eine Gefahr einerseits Verständnis und Reaktionen der Fahrer auf die Warnungen verbessern, andererseits aber auch kognitiven Verarbeitungsaufwand und Reaktionszeiten erhöhen und ablenken können. Sowohl kognitionspsychologische Theorien als auch Studien aus unserem Forschungsgebiet deuten darauf hin, dass die Darstellungsprinzipien der erweiterten Realität (AR, für engl. augmented reality) das Potenzial bieten, die Effizienz solcher Warnungen durch eine optimierte Kodierung von Zusatzinformationen zu steigern. AR-Warnungen können inhärent die Position einer Gefahr übermitteln, ohne dass der Fahrer dazu eine abstrakte Repräsentation der Information auf die reale Umwelt übertragen muss. Das grundlegende Ziel der vorliegenden Arbeit besteht darin, die psychologischen Faktoren zukünftiger vernetzter Kollisionswarnungen zu verstehen. Ausgehend von der theoretischen Analyse relevanter psychologischer Theorien wurden wesentliche Implikationen und offene Fragestellungen abgeleitet. Zur Beantwortung dieser Fragen wurden drei Fahrsimulator- Studien durchgeführt, in denen der Einfluss von AR als Darstellungsprinzip auf die Effizienz begrenzt zuverlässiger Warnungen über sichtverdeckte Gefahren untersucht wurden. Um valide Aussagen über die längerfristige Wirksamkeit treffen zu können, wurden in den Versuchen sowohl notwendige als auch unnötige Warnungen betrachtet. Eine erste Studie mit 88 Teilnehmern untersuchte den Mehrwert prototypischer AR-Warnungen unterschiedlicher Modalität (visuell vs. auditiv) gegenüber unspezifischen Warnungen. Visuelle AR-Warnungen zeigten klare Vorteile bezüglich Blick- und Bremsreaktionen, Geschwindigkeiten, Kollisionszahlen und subjektiven Bewertungen. Auditive AR-Warnungen hingegen führten zu einzelnen positiven, jedoch auch einigen negativen Effekten. In der zweiten Studie mit 80 Teilnehmern wurden die Auswirkungen gestalterischer Teilaspekte visueller AR-Warnungen verglichen. Das Hinzufügen von spezifischen Warnsymbolen über Bewegungsrichtung und Typ der Gefahr oder einer Vergrößerungs-Animation mit gleicher zeitlicher Veränderung wie bei der AR-Warnung führte zu einzelnen positiven aber nicht konsistenten Effekten. Im Gegensatz dazu führten räumlich verortete AR-Warnungen erneut sowohl zu schnelleren und stärkeren Fahrerreaktionen als auch zu besseren subjektiven Bewertungen. In der dritten Studie mit 36 Teilnehmern wurden schließlich die individuellen Effekte der räumlichen Information an sich und der Codierung dieser Information mittels AR analysiert. Dazu wurden Warnungen ohne Information über die Position der Gefahr, mit symbolisch kodierter Information, sowie mit AR-kodierter Information verglichen. Der höhere Informationsgehalt führte zu durchgehend stärkeren Bremsungen, höherem Systemvertrauen und besseren subjektiven Bewertungen. Darüber hinaus ermöglichte die AR-Kodierung desselben Informationsgehalts der Warnungen sowohl schnellere Gefahrenentdeckung als auch kürzere Bremsreaktionszeiten. Insgesamt bestätigen die Ergebnisse der vorliegenden Arbeit einen deutlichen Mehrwert von spezifischen Informationen bei Warnungen vor sichtverdeckten Gefahren sowie das hohe Potenzial von AR als Darstellungsprinzip, insbesondere für Warnungen zukünftiger Kollisionsvermeidungssysteme. Die systematische Analyse der bei der Gestaltung von Warnungen relevanten psychologischen Faktoren sowie unsere empirischen Erkenntnisse zu deren relativen Einfluss auf das Nutzerverhalten können zudem auf Warnungen anderer Anwendungen und Domänen übertragen werden, und somit einen generellen Beitrag zur Vermeidung von Unfällen in Mensch-Maschine-Systemen liefern.