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The Small Aircraft Transportation System (SATS) is a partnership among various organizations including NASA, the FAA, US aviation industry, state and local aviation officials, and universities. The program objectives are intend to reduce travel times by providing high-speed, safe travel alternatives by making use of small aircraft and underused small airports throughout the nation. A major component of the SATS program is the Smart Landing Facility (SLF). The SLF is a small airport that has been upgraded to handle SATS traffic. One of the services needed at SLFs is air surveillance of the airspace surrounding it. This thesis researches the different surveillance techniques available for use at the SLFs. The main focuses of this paper are an evaluation of the Traffic Alert and Collision Avoidance System (TCAS) when used as a ground sensor at SLFs and the design of a Position and Identification Reporting Beacon (PIRB). The use of the TCAS ground sensor is modeled in Matlab and the results of that model are discussed. The PIRB is a new system that can be used in conjunction with the Automatic Dependent Surveillance-Broadcast (ADS-B) system or independently to provide position information for all aircraft using GPS based positioning. / Master of Science

This dissertation contributes to a better understanding of curiosity resolution. I investigate the premise that the experience of curiosity resolution is influenced both by the fact that curiosity is resolved, as well as how it is resolved. While the outcome associated with curiosity resolution can be positive or negative in nature, the experience of curiosity resolution itself is predicted to be pleasant in nature. Therefore, I propose that the degree to which each of these two resolution facets is salient will influence curiosity-related evaluations. In this dissertation, I investigate pre-resolution expectations as well as post-resolution downstream consequences. Prior to curiosity resolution, I propose that individuals are likely to be focused on the outcome they will obtain. However, when faced with uncertain outcomes, individuals strategically heighten anticipated feelings of disappointment in order to protect against actual disappointment when the outcome is revealed; thus, I predict and demonstrate in four studies that curious consumers will display heightened levels of pre-resolution feelings of anticipated disappointment. After curiosity resolution, I propose that individuals experience not only positive or negative feelings associated with the outcome obtained, but also positive feelings of resolution itself. In four studies, I investigate the power of curiosity resolution to buffer negative responses to relatively undesirable outcomes. Importantly, I also demonstrate that consumers' focus on either the outcome obtained or on the experience of resolution itself can be experimentally shifted, thereby mitigating the previously described effects. / Ph. D.

Baigiamajame magistro darbe nagrinėjama automatinio priklausomo stebėjimo (ADS-B) sistema pakeisianti įprastinę oro erdvės stebėjimo radarų sistemą. Darbe išnagrinėti pagrindiniai sistemos veikimo principai, jos pritaikymas ir sudėtinės dalys, kartu su signalų formavimo ypatybėmis. Atliktas tyrimas sudarytas iš 9 atskirų bandymų apimančių sistemos kokybės patikros, signalo sudėties ir patikimumo įvertinimą. Tyrimas atliktas naudojant atsakiklių tyrimų stendą, kuris atitinka antžeminį ADS-B sistemos segmentą ir orlaivyje įmontuotą atsakiklį, kuris atitinką vartotojo segmentą. Tyrimo metu išnagrinėjamos ADS-B sistemos komunikacijos segmento savybės juos lyginant su naujausia literatūra ir techniniais sistemos įgyvendinimo sprendimais. Išnagrinėjus gautus rezultatus ir literatūrą pateikiamos sistemos tobulinimo rekomendacijos ir tolesnio tyrimo metodikos patobulinimai ir siūlymai. Darbą sudaro 10 dalių: įvadas, literatūros apžvalga, analitinė dalis, bandymų metodika, tyrimo aprašymas, darbo apžvalga, išvestiniai duomenys, išvados, literatūros sąrašas. Darbo apimtis – 71 p. teksto be priedų, 47 pav., 7 lent., 30 bibliografinių šaltinių. Atskirai pridedami darbo priedai. / This master‘s thesis explores automatic dependant surveillance – broadcast system (ADS-B) which will replace conventional radar based surveillance system in aviation air control management. Thesis consists of general overview of the system operation, its applicability, integration and structure with signal formatting possibilities. Field analysis was made which consists of 9 tests including system quality parameters, signal structure and reliability tests. Analysis was made by transponder interrogation device, referring to ground segment of ADS-B system, and transponder device mounted in aircraft, referring to ADS-B system users. Analysis includes ADS-B system communication segment features, literature analysis together with system implementation decisions. There is listed the conclusions of tests data together with suggestions for further system analysis and recommendations for system implementation possibilities. Thesis consist of: 71 p. text without appendixes, 47 pictures, 7 tables, 30 bibliographical entries. Appendixes included.

The Swedish consumers are concerned of their online privacy, while companies increasingly gather personal information with business intelligence (BI) technologies in order to customize online banner ads, among the favoured marketing techniques. Meanwhile, marketers treasure the opportunity to target individuals. The purpose of this research is to generate insights of Swedes’ experiences of intrusion of their privacy online, and their behavioural response to personalised banner advertisements. The research will also observe if there are differences depending on the consumers’ ages. Mediating factors will be regarded how they influence the online users perceived intrusiveness and usefulness of personalised ads. The study is exploratory and aims to provide extensive awareness and beliefs around a complex phenomena. It will have a qualitative approach where data collection is conducted through semi-structured, in-depth, interviews with Swedish consumers from two age groups, complemented by three expert interviews. The results show that, in comparison, elderly consumers have less knowledge of personalised advertising, as well as BI-technology, leading to higher privacy concern and perceived intrusiveness when exposed to these ads. Members of the generation Y comprehend the phenomena to a greater extent, and more easily see the usefulness presented, but are overall ambiguous. Attitudes are likely to be formed based on the experienced intrusiveness contra usefulness, but are not clearly influencing trust, loyalty of future purchasing behaviours. Generally, marketers and consumers’ views show incongruence, as marketers remain very positive to using personal information to customize ads, while consumers do not always perceive it similarly. A balance can be difficult to achieve, but a unanimous belief demand high accuracy of content and placement of the personalised ads to be perceived as useful.

O trabalho teve como objetivo a investigação de Metodologias de Cálculo dos Reatores Subcríticos acionados por fonte externa de nêutrons, tais como, \"Accelerator Driven Subcritical Reactor\" (ADSR) e \"Fusion Driven Subcritical Reator\" (FDSR) , que são reatores nucleares subcríticos com uma fonte externa de nêutrons. Tais nêutrons são produzidos, no caso do ADSR, através da interação de partículas aceleradas (prótons, deutério) com um alvo (Pb, Bi, etc) ou através das reações de fusão, no caso do FDSR. Este conceito de reator vem sendo objeto de intensa pesquisa, sobretudo pela possibilidade de ser utilizado para transmutar o enorme inventario de rejeitos nucleares, principalmente os transurânicos (TRU) e os produtos de fissão de meia-vida longa (LLFP). Neste trabalho enfatiza os seguintes aspectos: (i) complementar e aprimorar a metodologia de cálculos neutrônicos com queima e transmutação e implementá-la computacionalmente; (ii) e utilizando esta metodologia, participar dos Projetos Coordenados de Pesquisa (CRP) da Agência Internacional de energia Atômica \"Analytical and Experimental Benchmark Analysis of ADS\" e \"Collaborative work on use of LEU in ADS\", principalmente na reprodução dos resultados experimentais da instalação subcrítica Yalina Booster e também no cálculo de um núcleo subcrítico do reator IPEN/MB-01, (iii) analisar comparativamente diferentes bibliotecas de dados nucleares, no cálculo de parâmetros integrais (keff), diferenciais (espectro, fluxo) e de queima e transmutação (inventário ao final do ciclo) e (iv) aplicar a metodologia desenvolvida em um estudo que possa ajudar na escolha futura de um sistema transmutador dedicado. Foram utilizados para tanto os seguintes códigos: MCNP (Transporte de partículas por Monte Carlo), MCB (acoplamento do MCNP com código de transmutação) e o sistema NJOY para o processamento dos arquivos de dados nucleares avaliados. / This works had as goal to investigate calculational methodologies on subcritical source driven reactor, such as Accelerator Driven Subcritical Reactor (ADSR) and Fusion Driven Subcritical Reactor (FDSR). Intense R&D has been done about these subcritical concepts, mainly due to Minor Actinides(MA) and Long Lived Fission Products(LLFP) transmutation possibilities. In this work, particular emphasis has been given to: (i ) complement and improve calculation methodology with neutronic transmutation and decay capabilities and implement it computationally, (ii ) utilization of this methodology in the Coordinated Research Project (CRP) of the International Atomic Energy Agency Analytical and Experimental Benchmark Analysis of ADS and in the Collaborative Work on Use of Low Enriched Uranium in ADS, especially in the reproduction of the experimental results of the Yalina Booster subcritical assembly and study of a subcritical core of IPEN/MB-01 reactor, (iii ) to compare dierent nuclear data libraries calculation of integral parameters,such as keff and ksrc, and dierential distributions, such as spectrum and ux, and nuclides inventories and (iv ) apply the developed methodology in a study that may help future choices about dedicated transmutation system. The following tools have been used in this work: MCNP (Monte Carlo N particle transport code), MCB (enhanced version of MCNP that allows burnup calculation) and NJOY to process nuclear data from evaluated nuclear data files.

Este é um trabalho de revisão. Os principais formalismos no desenvolvimento da teoria de cordas são introduzidos e discutidos: a corda bosônica e as supercordas no formalismo de Ramond-Neveu-Schwarz e no formalismo de Green-Schwarz. São introduzidas também as açôes efetivas no limite de baixas energias das D-branas (ação DBI) e das teorias de supergravidade (D=10,11). Por fim, são analisados alguns aspectos da correspondência AdS/CFT, enunciando a conjectura e introduzindo algumas das entradas do dicionário. Os apêndices contêm tópicos de grande relevância para o texto e podem ajudar a esclarecer vários raciocínios e passagens ao longo do mesmo. / This is a review work. The main formalisms on the development of string theory are introduced and discussed: the bosonic string and the superstrings formalisms of Ramond-Never-Schwarz and Green-Schwarz. The effective actions in the low energy limit of the D-branes (DBI action) and supergravity theories (D=10,11) are introduced as well. Finally, some aspects of the AdS/CFT correspondence are analised, enunciating the conjecture and introducing some entries of the dictionary. The appendices contains some topics that are highly relevant for the whole text and may help clarify several ideas and arguments through it.

Este trabalho apresenta um estudo da Física dos Sistemas dirigidos por Fontes Externas (ADS). É apresentada a definição de alguns parâmetros estáticos e cinéticos da Física do reator que são importantes na avaliação e definição destes sistemas. O objetivo é demonstrar que há diferenças nestes parâmetros quando o sistema está no nível crítico ou subcrítico. Além disso, o trabalho mostra as diferenças observadas nos parâmetros para diferentes modelos de cálculo. São mostradas nesta dissertação duas metodologias de cálculo: Gandini&Salvatores e Dulla e são calculados alguns destes parâmetros utilizando as duas metodologias. O código determinístico de transporte ANISN é utilizado no cálculo destes parâmetros. Numa configuração subcrítica do Reator IPEN/MB-01 dirigido por uma fonte externa de nêutrons são calculados alguns parâmetros físicos. No final do trabalho são apresentadas as conclusões obtidas através destes cálculos. / This work presents the Physics of Source Driven Systems (ADS). It shows some statics and kinetics parameters of the reactor Physics and when it is sub critical, that are important in evaluation and definition of these systems. The objective is to demonstrate that there are differences in parameters when the reactor is critical. Moreover, the work shows the differences observed in the parameters for different calculation models. Two calculation methodologies are shown in this dissertation: Gandini&Salvatores and Dulla, and some parameters are calculated. The ANISN deterministic transport code is used in calculation in order to compare these parameters. In a sub critical configuration of IPEN/MB-01 Reactor driven by an external source some parameters are calculated. The conclusions about calculation realized are presented in end of work.

Esta tese é um estudo de estabilidade de modos quasinormais em um sistema que apresenta uma mudança de estabilidade ao variar continuamente os parâmetros físicos de um buraco negro. A mudança de estabilidade encontrada possui interpretações na correspondência AdS/CFT. A ferramenta principal utilizada neste trabalho para o cálculo de modos quasinormais foram métodos numéricos que podem ser utilizados em inúmeros trabalhos desta área de pesquisa, especialmente por não dependerem de suposições de simetria ou de comportamento conveniente do sistema físico. / This thesis is a study of stability of quasinormal modes in a system featuring a stability change if one continuously varies the physical parameters of a black hole. The stability change thus found has some possible interpretations in the AdS/CFT correspondence. The main tool used in this study for calculating quasinormal modes are numerical methods that can be used in numerous works in this area of research, especially because they do not depend on assumptions of symmetry or any convenient behavior of the physical system.