Corrugated horn antenna for a CosmoGal satellite with reduced dimensions

This paper presents the design methodology for the creation of corrugated horn antennas for the CosmoGal satellite. The mission will collect the radiation of the cosmic microwave background, by a radiometer in three different radio astronomy frequency bands (10.6-10.7GHz; 15.35-15.4GHz; 23.6-24GHz). It is discussed the design of several types of horns, simulated with the CST software. The best result points to a choked Gaussian corrugated horn antenna, with directivity of 23 dBi, side lobes 35 dB below and cross polarization better than -45 dB. Plus, with the advantage of having a small dimension, with a total length of only 7.43λ © 2014 IEEE.

Dimensions of self-rated health in older adults

OBJECTIVE To analyze the association between negative self-rated health and indicators of health, wellbeing and sociodemographic variables in older adults. METHODS Cross-sectional study that used data from a population-based health survey with a probability cluster sample that was carried out in Campinas, SP, Southeastern Brazil,, in 2008 and 2009. The participants were older adults (≥ 60 years) and the dependent variable was self-rated health, categorized as: excellent, very good, good, bad and very bad. The adjusted prevalence ratios were estimated by means of Poisson multiple regression. RESULTS The highest prevalences of bad/very bad self-rated health were observed in the individuals who never attended school, in those with lower level of schooling, with monthly per capita family income lower than one minimum salary. Individuals who scored five or more in the physical health indicator also had bad self-rated health, as well as those who scored five or more in the Self-Reporting Questionnaire 20 and those who did not refer feeling happiness all the time. CONCLUSIONS The independent effects of material life conditions, physical and mental health and subjective wellbeing, observed in self-rated health, suggest that older adults can benefit by health policies supported by a global and integrative view of old age.

Vulnerabilities in snakebites in Sao Paulo, Brazil

ABSTRACT OBJECTIVE To describe elements of vulnerability of victims of snakebite. METHODS This qualitative, descriptive, cross-sectional study had, as theoretical framework, the concept of vulnerability in individual, social, and programmatic dimensions. We interviewed 21 patients admitted into a hospital specialized in the care of accidents caused by venomous animals. The interviews were analyzed according to a discourse analysis technique. RESULTS Patients were mainly young men, living in remote countryside areas, where health services frequently have limited resources. We found social and individual conditions of vulnerability, such as precarious schooling, low professional qualification, housing without access to piped water, no sewage treated, and no regular garbage collection, and lack of knowledge on this health problem. Regarding the programmatic dimension, we found limited accessibility to the health services that could affect the prognosis and the frequency of sequelae and deaths. CONCLUSIONS Considering such vulnerabilities evoke the need to improve the program for control the Accidents by Venomous Animals and the training of health workers, we highlight the potential use of the concept of vulnerability, which may amplify the understanding and the recommendations for the practice and education related to snakebites.

B-learning quality: dimensions, criteria and pedagogical approach

Measuring the quality of a b-learning environment is critical to determine the success of a b-learning course. Several initiatives have been recently conducted on benchmarking and quality in e-learning. Despite these efforts in defining and examining quality issues concerning online courses, a defining instrument to evaluate quality is one of the key challenges for blended learning, since it incorporates both traditional and online instruction methods. For this paper, six frameworks for quality assessment of technological enhanced learning were examined and compared regarding similarities and differences. These frameworks aim at the same global objective: the quality of e-learning environment/products. They present different perspectives but also many common issues. Some of them are more specific and related to the course and other are more global and related to institutional aspects. In this work we collected and arrange all the quality criteria identified in order to get a more complete framework and determine if it fits our b-learning environment. We also included elements related to our own b-learning research and experience, acquired during more than 10 years of experience. As a result we have create a new quality reference with a set of dimensions and criteria that should be taken into account when you are analyzing, designing, developing, implementing and evaluating a b-learning environment. Besides these perspectives on what to do when you are developing a b-learning environment we have also included pedagogical issues in order to give directions on how to do it to reach the success of the learning. The information, concepts and procedures here presented give support to teachers and instructors, which intend to validate the quality of their blended learning courses.

“Culture Stops Development!”: Bijagó Youth and the Appropriation of Developmentalist Discourse in Guinea-B

African Studies Review, Volume 52, Number 2, pp. 69–

Dimensions of source credibility in the case of user-generated advertisements

A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics

Developing and validating a measure of the strength of the HRM system: Operationalizing the construct and relationships among its dimensions

The four studies in this article introduce a questionnaire to measure Strength of the HRM System (HRMSQ), a multidimensional construct, theoretically developed by Bowen and Ostroff (2004). Strength of the HRM System is a set of process characteristics that lead to effectiveness in conveying signals to employees that allow them to create a shared meaning of desired and appropriate work behaviours. Nine characteristics are suggested, grouped in three features: Distinctiveness, Consistency and Consensus. Study 1 developed and tested a questionnaire in a sample of workers from five different sectors. Study 2 cross-validated the measure in a sample of civil servants in a municipality. These two studies used performance appraisal as the reference HRM practice and led to a short version of the HRMSQ. Study 3 and Study 4 extend the HRMSQ to several common HRM practices. The HRMSQ is tested in two samples, of call center and several private and public organizations‟ workers (study 3). In study 4 the questionnaire is refined and tested with a sample from a hotel chain and finally cross-validated with two other samples, in the insurance and batteries sectors, leading to a longer version of the HRMSQ. Content analysis of several interviews with human resource managers and the Rasch model (1960, 1961, 1980), were used to define and select the indicators of the questionnaire. Convergent, discriminant and predictive validity of the measure are tested. The results of the four studies highlight the complexity of the relationships between the proposed characteristics and support the validity of a parsimonious measure of Strength of the HRM System.

Reconceptualising public spaces of (IN)equality: sensing and creating layers of visibility

Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em Geografia e Planeamento Territorial - Especialidade: Geografia Humana

A arbitragem como alternativa para diminuir a morosidade do sistema judiciário brasileiro

This thesis is about arbitration, a form of alternative dispute resolution, as a solution for the slowness of the Brazilian Judiciary. The paper starts with an approach of the fundamental rights, highlighting their positivation, important to distinguish them from human rights, the four dimensions of the fundamental rights and, lastly, the analysis of their features, emphasizing their characters of complementarity and universality. After, it starts to discourse about the “access to Justice”, an important fundamental right, and, to delimitate the role of the Judiciary and the problems related to solve cases in a reasonable amount of time. Next, it exposes other alternative forms of dispute resolutions that, like the arbitration, can help to the concretization of a faster and more effective Justice. Then, it discusses the historical evolution of the arbitration in Brazil, highlighting the contemporary features of the institute, which were more visible with the ratification of the New York Convention and the promulgation of Law nº 9.307/1996. In addition, it analyses the possible changes that will come with the New Brazilian Procedure Law Code and the PL 7.108/2014, intended to change the current Arbitration Law. It also explains the main arbitration attributes, describing the peculiarities of the arbitral convention, the arbitrator role, and the arbitral award aspects. At least, it lists the main reasons someone should choose arbitration instead the Judiciary, considering the Brazilian Courts reality.

Empirically testing the dimensions of consumer trust in e-commerce

In the fields of marketing and general management, many are the contributions of literature relating trust and e‐commerce. Trust is perceived as an issue that concerns the consumers’ intention to purchase. As so, in this research, a path model is empirically tested in order to develop solutions for Internet vendors on how to deal with consumers and increase their trust. The path model measures how the dimensions of trust, named as competence, integrity and benevolence positively influence the overall trust of the consumers and at the same time how the sources of trust – consumer characteristics, firm characteristics, website infrastructure and interactions influence those dimensions. The data used to test the model was collected in Portugal, through 365 valid cases. Findings revealed that consumers, which have high level of overall trust, are more likely to intent to purchase online.

Dimensions of source credibility in the case of user-generated advertisements

User-generated advertising changed the world of advertising and changed the strategies used by marketers. Many researchers explored the dimensions of source credibility in traditional media and online advertising. However, little previous research explored the dimensions of source credibility in the context of user-generated advertising. This exploratory study aims to investigate the different dimensions of source credibility in the case of user-generated advertising. More precisely, this study will explore the following factors: (1) objectivity, (2) trustworthiness, (3) expertise, (4) familiarity, (5) attractiveness and (6) frequency. The results suggest that some of the dimensions of source credibility (objectivity, trustworthiness, expertise, familiarity and attractiveness) remain the same in the case of user-generated advertising. Additionally, a new dimension is added to the factors that explain source credibility (reputation). Furthermore, the analysis suggests that the dimension “frequency” is not an explanatory factor of credibility in the case of user-generated advertisement. The study also suggests that companies using user-generated advertisement as part of their overall marketing strategy should focus on objectivity, trustworthiness, expertise, attractiveness and reputation when selecting users that will communicate sponsored user-generated advertisements.

Media(ted) discourse and society: rethinking the framework of critical discourse analysis

The analysis of journalistic discourse and its social embeddedness has known significant advances in the last two decades, especially due to the emergence and development of Critical Discourse Analysis. However, three important aspects remain under-researched: the time plane in discourse analysis, the discursive strategies of social actors, and the extra- and supra-textual effects of mediated discourse. Firstly, understanding the biography of public matters requires a longitudinal examination of mediated texts and their social contexts but most forms of analysis of journalistic discourse do not account for the time sequence of texts and its implications. Secondly, as the media representation of social issues is, to a large extent, a function of the discursive construction of events, problems and positions by social actors, the discursive strategies that they employ in a variety of arenas and channels ‘‘before’’ and ‘‘after’’ journalistic texts need to be examined. Thirdly, the fact that many of the modes of operation of discourse are extra- or supra-textual calls for a consideration of various social processes ‘‘outside’’ the text. This paper aims to produce a theoretical and methodological contribution to the integration of these issues in discourse analysis by proposing a framework that combines a textual dimension with a contextual one

Iglesia argentina y memoria de las víctimas de la última dictadura militar. Revisión del discurso y de la praxis eclesial de reconciliación, a partir de determinados aportes de la Escuela de Frankfurt y de la Nueva Teología Política. Argentine Church and Memory of the Victims of the Military Dictatorship. Review of the Ecclesiastic Discourse and Praxis of Reconciliation.

En el marco de la recuperación de la memoria en relación con los hechos de la última dictadura militar es importante determinar los motivos ideológico-teológicos y prácticos que dificultaron una oposición significativa por parte de la jerarquía de la iglesia a la violación de los derechos humanos, e individualizar los argumentos que impulsaron un discurso y una praxis de reconciliación que privilegió el olvido de las víctimas y apoyó acríticamente los «proyectos de olvido», como la ley de punto final, entre otros. Para analizar dichos discursos y praxis se recurre principalmente a Johann Metz, quien, vinculado a la Escuela de Frankfurt, propone una razón anamnética del sufrimiento ajeno. La originalidad del proyecto es doble, por su contenido y por su enfoque: la confrontación del «servicio de reconciliación» eclesial con la «memoria de las víctimas». Hipótesis de trabajo: el discurso y la praxis eclesial en relación al «servicio de reconciliación» realizado por el Episcopado argentino a partir de 1981, pone de manifiesto: primero, que siguieron vinculados a la idea de "nación católica" (Zanatta 1996, Dri 1997, Esquivel 2004), lo que dificultó, junto a otros factores, la visibilización de las víctimas; segundo, a su vez, analizados a la luz de los aportes filosófico-teológicos mencionados, muestran una notable carencia en la valoración de la memoria de las víctimas, esperable en una reconciliación. Objetivo general: realizar un análisis crítico de los discursos y prácticas institucionales oficiales de la Iglesia católica en Argentina en relación con la memoria de las víctimas de la última dictadura militar. Objetivos específicos: confrontar las experiencias eclesiales argentinas recientes, y sus conceptualizaciones y tipos de argumentación, con una tradición de pensamiento que en relación al acontecimiento del Holocausto sitúa en el centro de la reflexión temas como el de la memoria, el sufrimiento de las víctimas, y un modo peculiar de tratamiento de los hechos históricos; además, individualizar y analizar los argumentos que dificultaron la búsqueda de la justicia y la memoria de las víctimas. Metodología y etapas. 1° Etapa: analizar y sistematizar algunos aspectos de las teorías del conocimiento histórico y de la razón comunicativa en determinadas obras de Benjamin, Bloch y Habermas; posteriormente, precisar la apropiación conceptual de las categorías histórico-filosóficas de dichas corrientes llevada a cabo por Metz para elaborar su «memoria de las víctimas». 2° Etapa: revisar el discurso y la praxis eclesial a partir de 1981 a la luz del marco teórico ya estudiado. Será necesario, por una parte, detenerse en las declaraciones eclesiales oficiales referidas al retorno de la democracia, a las leyes de punto final y obediencia debida, como así también, en el reconocimiento y pedido de perdón por las culpas del pasado.

A Novel Algorithm to Quantify Coronary Remodeling Using Inferred Normal Dimensions

Background:Vascular remodeling, the dynamic dimensional change in face of stress, can assume different directions as well as magnitudes in atherosclerotic disease. Classical measurements rely on reference to segments at a distance, risking inappropriate comparison between dislike vessel portions.Objective:to explore a new method for quantifying vessel remodeling, based on the comparison between a given target segment and its inferred normal dimensions.Methods:Geometric parameters and plaque composition were determined in 67 patients using three-vessel intravascular ultrasound with virtual histology (IVUS-VH). Coronary vessel remodeling at cross-section (n = 27.639) and lesion (n = 618) levels was assessed using classical metrics and a novel analytic algorithm based on the fractional vessel remodeling index (FVRI), which quantifies the total change in arterial wall dimensions related to the estimated normal dimension of the vessel. A prediction model was built to estimate the normal dimension of the vessel for calculation of FVRI.Results:According to the new algorithm, “Ectatic” remodeling pattern was least common, “Complete compensatory” remodeling was present in approximately half of the instances, and “Negative” and “Incomplete compensatory” remodeling types were detected in the remaining. Compared to a traditional diagnostic scheme, FVRI-based classification seemed to better discriminate plaque composition by IVUS-VH.Conclusion:Quantitative assessment of coronary remodeling using target segment dimensions offers a promising approach to evaluate the vessel response to plaque growth/regression.

Episodes of the life and death of thin fluid membranes : patterns and dynamics at the cross-over from two to three dimensions

Otto-von Guericke-Universität Magdeburg, Fakultät für Naturwissenschaften, Dissertation, 2016