El presente trabajo consiste en un análisis de la relación entre autocongruencia, apego a la marca, y la compra impulsiva. Para el estudio se tomó en cuenta papers relacionados con la compra impulsiva, y cómo se desencadena a través del apego emocional hacia las marcas, lo que hace que los consumidores desarrollan esta conducta. Además, se busca conocer principalmente la influencia de la autocongruencia real e ideal en el apego a la marca, planteando una visión integradora entre los tres conceptos. Esto implica un estudio cuantitativo que abarca realizar 400 encuestas a personas que realizan compras online y offline no planificadas de forma quincenal. / The present work consists of an analysis of the relationship between self-consistency, brand attachment, and impulsive buying. For the study, papers related to impulsive buying were taken into account, and how it is triggered through emotional attachment to brands, which causes consumers to develop this behavior. In addition, it is mainly sought to know the influence of real and ideal self-congruence in the attachment to the brand, proposing an integrating vision between the three concepts. This implies a quantitative study that covers 400 surveys of people who make unplanned online and offline purchases every fortnight. / Trabajo de investigación

Cette thèse s’intéresse au calcul de solutions globales de problèmes de commande optimaleen boucle ouverte. La méthodologie générale se base sur l’approche par les moments, oùun problème d’optimisation est relâché en un problème généralisé des moments, dont unehiérarchie de relaxations semi-définies peut être résolue numériquement. L’approche esttout d’abord appliquée aux problèmes impulsionnels linéaires à temps variant, en modélisantle contrôle par une mesure. Les conditions semi-définies qui en résultent permettentde s’affranchir complètement des difficultés liées à la discrétisation temporelle. Ensuite, ense basant sur le formalisme des mesures d’occupations, la méthode peut être étendue auxsystèmes impulsionnels non-linéaires, et fournit une suite monotone de bornes inférieuresau coût optimal. Enfin, les résultats précédents peuvent être transposés aux systèmes àcommutation, en modélisant chaque mode par une mesure d’occupation associée. Ceci permetd’obtenir des gains substantiels en charge de calcul par rapport à l’approche classiqueoù l’espace de contrôle est mesuré / This thesis details a global method for optimal control of open-loop systems. This is doneby relaxing the control problem as a generalized moment problem, which can be solvednumerically by a hierarchy of semi-definite relaxations. The approach is first applied tothe impulsive control of linear time varying systems, by modeling the controls by a measure.The resulting semi-definite conditions circumvent time discretiziation and relateddifficulties. By the use of occupation measures, the method is then extended to a classof impulsive non-linear problems. This results in a monotone sequence of lower boundsto the original control problem. Finally, those results are transposed to switched system,by modeling each mode by a corresponding occupation measure. This allows for largecomputational gains with respect to the classical approach, where the control space ismeasured

Proper modelling of the gravitational fields of irregularly shaped asteroids and comets is an essential yet challenging part of any spacecraft visit and flyby to these bodies. Accurate density representations provide crucial information for proximity missions, which rely heavily on it to design safe and efficient trajectories. This work explores using a spacecraft swarm to maximise the measured gravitational signal in a hypothetical mission around the comet 67P/Churyumov-Gerasimenko. Spacecraft trajectories are simultaneously computed and evaluated using a high-order numerical integrator and an evolutionary optimisation method to maximise overall signal return. The propagation is based on an open-source polyhedral gravity model using a detailed mesh of 67P/C-G and considers the comet’s sidereal rotation. We compare performance on various mission scenarios using one and four spacecraft. The results show that the swarm achieved an expected increase in coverage over a single spacecraft when considering a fixed mission duration. However, optimising for a single spacecraft results in a more effective trajectory. The impact of dimensionality is further studied by introducing an iterative local search strategy, resulting in a generally improved robustness for finding efficient solutions. Overall, this work serves as a testbed for designing a set of trajectories in particularly complex gravitational environments, balancing measured signals and risks in a swarm scenario. / En korrekt modellering av de gravitationsfält som uppstår runt irreguljärt formade asteroider och kometer är en avgörande och utmanande del för alla uppdrag till likartade himlakroppar. Exakta densitetsrepresentationer tillhandahåller viktig information för att säkerställa säkra och effektiva rutter för särsilt närgående rymdfarkoster. I denna studie utforskar vi användningen av en svärm av rymdfarkoster för att maximera den uppmätta gravitationssignalen i ett hypotetisk uppdrag runt kometen 67P/Churyumov-Gerasimenko. Rymdfarkosternas banor beräknas och utvärderas i parallella scheman med hjälp av en högre ordningens numerisk integration och en evolutionär optimeringsmetod i syfte att maximera den totala uppmätta signalen. Beräkningarna baseras på en öppen källkod för en polyhedral gravitationsmodell som använder ett detaljerat rutnät av triangulära polygoner för att representera 67P/C-G och beaktar kometens egna rotation. Vi jämför sedan prestanden för olika uppdragscenarier med en respektive fyra rymdfarkoster. Resultaten visar att svärmen uppnådde en förväntad ökning i täckning jämfört med en enskild rymdfarkost under en fast uppdragsvaraktighet. Dock resulterar optimering för en enskild rymdfarkost i en mer effektiv bana. Påverkan av dimensionshöjningen hos oberoende variabler studeras vidare genom att introducera en iterativ lokal sökstrategi, vilket resulterar i en generellt förbättrad robusthet samt effektivare lösningar. Sammantaget fungerar detta arbete som en testbädd för att studera och utforma rymdfarkosters banor i särskilt komplexa gravitationsmiljöer, samt för att balansera uppmätta signaler och risker i ett svärmscenario.

With the increasing trust and power of influencers on social media, more research and information are needed on how influencers affect the emotions of their followers. The climate that exists on social media today contributes to calls for unsustainable consumption, which is something that influencers in particular contribute to. This phenomenon is something that requires knowledge, especially in the perspective where people's emotions are analyzed. This study will therefore study how FOMO (Fear Of Missing Out) is experienced on Instagram, from a consumption perspective among young women. The study also aims to investigate how impulsive consumption is triggered by FOMO created by influencers on Instagram. This is relevant as the concept of impulsive consumption creates an unsustainable consumer society. Since, according to previous research, influencers have a great impact on young social media users, this study also seeks to understand which specific characteristics have the greatest impact on purchase decisions. The empirical material has been collected through eight qualitative interviews that have been analyzed using the analysis strategy of thematization. The analysis has answered the three research questions set for the study: • How do young female social media users relate to the potential relationship between FOMO and impulsive buying decisions? • What emotions are created in young female social media users during impulsive consumption on Instagram? • What specific characteristics of influencers do young female social media users perceive as triggers for impulsive buying? The results of this paper shown that FOMO is a problem linked to consumption on social media. However, there is no established sense of fear but rather a sense of shame. Thus, the concept of SOMO (Shame Of Missing Out) is proposed in the study's discussion as the concept could be relevant for further studies. The study has also concluded that influencers affect the behavior of friendship circles, which means that people who do not follow influencers are also affected by their behavior in consumption. There are differing opinions about which character traits of influencers are seen as triggers for impulsive consumption. It appears from the collected empirical data that down-to-earth character traits are effective, but also character traits that show a luxurious lifestyle. This study has shown that there is an established problem regarding FOMO, consumption and influencers that needs attention. However, more research is needed to be able to draw more reliable conclusions on the subject / I takt med influencers ökade förtroende och makt på sociala medier krävs det mer forskning och information hur influencers påverkar deras följares känslor. Klimatet som finns på sociala medier idag bidrar till uppmaningar om ohållbar konsumtion, detta är något som främst influencers bidrar till. Detta fenomen är något som kräver kunskap framför allt i perspektivet där människors känslor analyseras. Denna studie kommer därmed att studera hur FOMO (Fear Of Missing Out) upplevs på Instagram, ur ett konsumtionsperspektiv hos unga kvinnor. Studien ämnar även att undersöka hur impulsiv konsumtion triggas av FOMO som skapas av influencers på Instagram. Detta är relevant då impulsiv konsumtion skapar ett ohållbart konsumtionssamhälle. Eftersom influencers enligt tidigare forskning har stor påverkan på unga sociala medieanvändare söker denna studie även att förstå vilka specifika karaktärsdrag som har störst påverkan på köpbeslut. Det empiriska materialet har samlats in genom åtta kvalitativa intervjuer som har analyserats utifrån analysstrategin tematisering. Analysen har besvarat de tre ställda forskningsfrågorna för studien: • Hur förhåller sig unga kvinnliga sociala medieanvändare till den potentiella relationen mellan FOMO och impulsiva köpbeslut? • Vilka känslor skapas hos unga kvinnliga sociala medieanvändare vid impulsiv konsumtion på Instagram? • Vilka specifika karaktärsdrag hos influencers upplever unga kvinnliga sociala medieanvändare är triggande för att handla impulsivt? Resultatet i denna uppsats visar att FOMO är ett problem kopplat till konsumtion på sociala medier. Däremot framkommer det inte en konstaterad känsla av rädsla utan snarare en känsla av skam. Därmed föreslås begreppet SOMO (Shame Of Missing Out) i studiens diskussion då begreppet skulle kunna vara relevant för fortsatta studier. Studien har även kommit fram till att influencers påverkar vänskapskretsars beteenden, vilket gör att personer som inte följer influencers likväl påverkas av deras beteenden inom konsumtion. Det finns spridda åsikter kring vilka karaktärsdrag hos influencers som ses som triggande för impulsiv konsumtion. Det framkommer från den insamlade empirin att jordnära karaktärsdrag är effektiva, men även karaktärsdrag som visar på en lyxig livsstil. Denna studie har visat att det finns ett konstaterat problem angående FOMO, konsumtion och influencers som behöver uppmärksammas. Det krävs däremot mer forskning för att kunna dra säkrare slutsatser kring ämnet.

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This study examined the predictive value of the three dimensions of youth psychopathic personality towards delinquency, on delinquency through the application of hierarchical regression analysis, while controlling for gender. Dimensions being: Callous/Unemotional-, Impulsive/Irresponsible-, and Grandiose/Manipulative traits. The study included 891 (48% female) Swedish adolescents from a community sample with a mean age of 14.28 (SD=.94) years. A self-report instrument was used to assess psychopathic traits in youth, the Youth Psychopathic Traits Inventory (YPI), consisting of 50 items and is specifically designed to lower the risk of response bias. Results: It was discovered that Impulsivity/Irresponsible behavior predicted statistically significant 14% of the variance in delinquency, and gender significantly predicted 4%. Callous/Unemotional predicted non-significant 0,3% and Grandiose/Manipulative predicted none of the variance in delinquency and was not significant. The findings regarding dimensions contradict the majority of research on the subject which has focused on CU-traits as main predictor of antisocial behavior, but in line with recent studies using a similar analytical approach showing Impulsivity/Irresponsible behavior as main predictor. The findings regarding gender are in line with previous research.

The aim of this investigation was to determine the modes of thinking and learning of South African disadvantaged learners as well as to discover whether the teaching methods used by their teachers, encourage diverse cognitive skills and learning styles amongst learners. A survey of existing literature on this subject identifies a number of theories that indicate that learners come to school with diverse modes of thinking and learning. Furthermore, existing literature, indicate that educationally disadvantaged learners tend towards a Field Dependent, socially orientated mode of cognitive processing and a largely visual and kinaesthetic mode of sensory processing information. Research also reveals that teaching methods and teacher expectation of learner potential play a vital role in the academic achievement of disadvantaged learners. Teachers tend to have lower expectations of the academic potential of disadvantaged learners. Moreover, teachers tend to favour teaching methods that meet the needs of learners who use Field Independent cognitive and Auditory sensory processing. Another aspect acknowledged in existing literature that influences the academic achievement of disadvantaged learners is the role of family and the community. Disadvantaged learners generally do not have the support and security of a stable home and are frequently exposed to violence and an educationally impoverished environment. Parents and guardians tend to be less involved in the education of their children. Disadvantaged learners who were part of this empirical study conducted in the Ekhuruleni Metropolitan area, east of Johannesburg, South Africa, showed a more concrete approach to academic activities and revealed a tendency towards Field Dependency and a visual and kinaesthetic sensory approach to processing information. Learners preferred more frequent social interaction during academic activities. The study also found that the teaching method most commonly used in the geographical area mentioned above, took the form of lecturing or `chalk-and-talk' and that teaching aids generally took the form of worksheets. Hence the teaching approach most used by teachers in the study, did not address the modes of thinking and learning of disadvantaged learners in the schools that participated in the empirical study and generally did not encourage deeper cognitive structures. / Educational Studies / D. Ed. (Psychology of Education)

在這篇論文中，我們討論的是一階非線性衝擊動態方程的週期邊界值問題。利用Schaefer定理及Banach固定點定理，我們得到一些解的存在性結果。 / In this thesis, we are concernd with nonlinear first-order periodic boundary value problems of impulsive dynamic equations on time scales. By using Schaefer’s theorem and Banach’s fixed point theorem we acquire some new existence results.

INTRODUÇÃO: A dependência química engloba alterações comportamentais, cognitivas e fisiológicas. A impulsividade está presente em muitos transtornos psiquiátricos. Sobre a impulsividade na dependência química de cocaína, os estudos existentes são relativamente novos. A Estimulação Magnética Transcraniana de repetição (EMTr) é um método capaz de neuromodular o cérebro. Este estudo avaliou os efeitos da EMTr sobre a impulsividade em dependentes de cocaína. MÉTODOS: Em um estudo randomizado, duplamente encoberto, 25 pacientes diagnosticados pelo DSM-IV-TR foram tratados com EMTr de alta frequência ativa (1250 pulsos/dia) ou EMTr placebo. O tratamento consistiu em 1 mês de aplicação de EMTr seguido de 2 meses em acompanhamento ambulatorial semanal em um grupo de prevenção de recaídas. Os pacientes foram avaliados antes do início do tratamento com EMTr (T0) e após o término das aplicações (T1), através dos instrumentos: The Shorter PROMIS Questionnaire, The Schalling Impulsivity Scale e The Leeds Dependence Questionnaire. RESULTADOS: 25 pacientes foram tratados e a análise dos dados demonstraram redução nos índices de impulsividade em ambos os grupos ao longo do tempo, porém, quando comparados entre si, os valores de interação não se mostraram significativos. CONCLUSÃO: Os efeitos da EMTr não diferiram em eficácia terapêutica na redução da impulsividade em dependentes de cocaína, com o efeito ativo correspondendo com o placebo / INTRODUCTION: Chemical addiction involves behavioral, cognitive and physiological alterations. Impulsivity is present in many psychiatric disorders. Studies about impulsivity and cocaine chemical addiction are relatively new. Transcranial Magnetic Stimulation (EMTr) is a method capable of neuromodulation the brain. This study evaluated the effects of EMTr over impulsivity in cocaine addicts. METHODS: This is a randomized doubly covert study with 25 patients diagnosed by the DSM-IV-TR who were treated with active high frequency EMTr (1250 pulses/day) or placebo. Treatment was consisted of one month of application of EMTr followed by 2 months of clinical follow-up in a relapse prevention group. Patients were evaluated before the treatment with EMTr (T0) and after the end of the applications (T1), through the instruments: The Shorter PROMIS Questionnaire, The Schalling Impulsivity Scale and The Leeds Dependence Questionnaire. RESULTS: 25 patients were treated and data analysis showed a reduction in the levels of impulsivity in both groups throughout the time. However, group comparisons did not show statistical differences. CONCLUSION: EMTr\'s effects did not differ in terms of therapeutical efficacy in the reduction of impulsivity in cocaine addicts

Introdução: Os maus tratos na infância e adolescência são considerados um problema de saúde pública devido a alta prevalência no Brasil e no mundo. A exposição a maus tratos está associada a alterações no desenvolvimento cognitivo, porém, há uma escassez de estudos brasileiros que investiguem o tema. Objetivos: Comparar o funcionamento neuropsicológico de adolescentes com e sem histórico de maus tratos, bem como estudar as relações entre essas vivências, desempenho neuropsicológico e sintomas psiquiátricos relacionados a impulsividade, oposição, hiperatividade e desatenção. Método: Cento e oito adolescentes foram selecionados em dois programas de atendimento a população em situação de vulnerabilidade e/ou risco social de São Paulo (SP). De acordo com a pontuação do Questionário de Traumas na Infância (QUESI), foram classificados em três grupos: GMT1 (grupo de maus tratos leves, n=35), GMT2 (grupo de maus tratos moderado a grave, n=19) e GC (grupo de comparação, n=54). Os adolescentes passaram por avaliação neuropsicológica com o foco na investigação de funções relacionadas a percepção visual e spam atencional (primeira unidade funcional), processamento e armazenamento de informações (segunda unidade funcional) e funcionamento executivo (terceira unidade funcional). Foram utilizadas escalas para avaliação psiquiátrica (K-SADS-PL) e investigação de sintomas de impulsividade, hiperatividade, desatenção e oposição (BIS-1, SNAP-IV). Os resultados obtidos nos grupos foram comparados com o controle estatístico de variáveis sociais (dificuldades socioeconômicas, escolaridade e abrigamento) e clínicas (transtornos psiquiátricos internalizantes e externalizantes, uso de medicação psiquiátrica e quociente intelectual estimado- QI). Por fim, foram feitas associações entre exposição a maus tratos, funcionamento neuropsicológico e sintomas psiquiátricos. Resultados: Os GMTs (grupos de maus tratos) apresentaram pior funcionamento intelectual em relação ao GC, sendo que o pior desempenho foi encontrado no GMT2 (p< 0,001). Medidas menores de QI estiveram associadas a prejuízo nas três unidades funcionais (p<= 0,049) e a mais sintomas de hiperatividade e desatenção (p <= 0,008). Foi encontrado pior desempenho dos GMTs nos testes para avaliação de segunda unidade funcional (p<= 0,001), porém, não foram encontradas diferenças entre os grupos na primeira e terceira unidades. Apesar disso, os testes de correlação indicaram que o aumento das pontuações no QUESI estava associado à piora do desempenho em todas as unidades funcionais (p<= 0,046). Os GMTs apresentaram maior impulsividade e oposição (p<= 0,008) e, quanto maior a pontuação no QUESI, maior a presença de sintomas de impulsividade, oposição, sintomas isolados de desatenção e sintomas mistos de desatenção e hiperatividade (p<= 0,006). Conclusão: Os resultados obtidos corroboram a associação entre exposição a maus tratos e dificuldades cognitivas e psiquiátricas. Os dados obtidos poderão contribuir para o planejamento de políticas públicas voltadas tanto à prevenção quanto para o tratamento de patologias associadas ao desenvolvimento neurobiológico alterado de crianças e adolescentes que crescem em condições adversas. / Introduction: Maltreatment experiences in childhood and adolescence are considered a public health problem due to high prevalence in Brazil and worldwide. The exposure to maltreatment is associated with changes in cognitive development; however, there is a shortage of Brazilian research that investigates this topic. Objectives: Comparison of neuropsychological functioning of adolescents with and without maltreatment history, as well as the research of relationships between these experiences, neuropsychological performance, and psychiatric symptoms relating to impulsivity, opposition, hyperactivity, and inattention. Methods: One hundred and eight adolescents were selected from two assistance programs for people in vulnerability and social risk situation in the city of Sao Paulo (SP). According to the Childhood Trauma Questionnaire (CTQ), three groups were classified: GMT1 Group (Mild Maltreatment, n = 35), GMT2 (group of moderate to severe maltreatment, n = 19) and GC (comparison group, n = 54). The adolescents underwent neuropsychological evaluation with a focus on the investigation of functions related to visual perception and attention spam (first functional unit), processing and retention of information (second functional unit) and executive functioning (third functional unit). Scales were used for psychiatric assessment (K-SADS-PL) and investigation of impulsivity, hyperactivity, inattention, and opposition symptoms (SNAP-IV, BIS-11). Results obtained in these groups were compared with statistical control of social variables (socioeconomic, school level, and shelter), and clinical variables (internalizing and externalizing psychiatric disorders, use of psychiatric medication, and estimated intellectual quotient - IQ). Lastly, associations between exposure to maltreatment, neuropsychological functioning and psychiatric symptoms were made. Results: The GMT (maltreatment groups) had a worse intellectual functioning compared to GC, while the worst performance was found in GMT2 (p < 0.001). Lower IQ measures were associated to impairment on the three functional units (p<= 0.049) and to more symptoms of inattention and hyperactivity (p <= 0.008). Worse performance on tests for evaluation of the second functional unit (p<= 0.001) was found for GMT, but no differences were found between the groups on the first and third units. Nevertheless, the correlation tests indicated that the increase in CTQ scores was associated to worse performance in all of the functional units (p<= 0,046). The GMT presented higher impulsivity and opposition (p<= 0,008) and the higher the CTQ score the more symptoms of impulsivity, opposition, isolated symptoms of inattention, and mixed symptoms of inattention and hyperactivity (p<= 0,006). Conclusion: The results confirm the negative association between exposure to maltreatment and psychiatric and cognitive difficulties. The data obtained will contribute to the planning of public policies for both prevention and treatment of diseases associated to altered neurobiological development of children and adolescents who grow up in adverse conditions.