Solar array study for solar electric propulsion spacecraft for the Encke rendezvous mission

The work is described which was performed on the design, analysis and performance of a 20 kW rollup solar array capable of meeting the design requirements of a solar electric spacecraft for the 1980 Encke rendezvous mission. To meet the high power requirements of the proposed electric propulsion mission, solar arrays on the order of 186.6 sq m were defined. Because of the large weights involved with arrays of this size, consideration of array configurations is limited to lightweight, large area concepts with maximum power-to-weight ratios. Items covered include solar array requirements and constraints, array concept selection and rationale, structural and electrical design considerations, and reliability considerations

The introduction of rapid diagnostic test for malaria in Mozambique: local appropriation and complementary therapeutics

In 2008 Mozambique's Ministry of Health (MoH), with the technical and financial support of transnational and international organisations such as United Nations (UN) agencies, USAID (United States Agency for International Development) and INGOs (International Non-Governmental Organisations), amongst others, introduced the Rapid Diagnostic Test (RDT) for malaria to be implemented across the country. This new biomedical technology impacted not just clinical practice, where health workers had to draw blood to be able to diagnose malaria (parasitological confirmation), but interacted with local worldviews and therapeutic practices in ways that needed to be incorporated into therapeutic interventions, notwithstanding patients' overall acceptance of the reliability of RDTs.info:eu-repo/semantics/publishedVersio

Ephemeral art in impermanent spaces: the effects of street art in the social construction of public space

This article sets out to show how the production and practices of street art in Lisbon have strong effects on what concerns the creation of images of the city – in its marketable consequences – and the promotion of discourses about the urban public space and its structures. Because street art displays a very particular relation with the urban space, the research on the dynamics that its practice and production create with the actors and institutions that shape the cities, show that it has an active role in creating images of the city, as well as proposing discourses about its public space. This article results from a research on street art and its implications in the social construction of public space, from the urban context of Lisbon. Within this research, street art is conceived as an art world in formation, specific as it exists in-between an underground practice and a full participation in the contemporary art world and its markets.info:eu-repo/semantics/acceptedVersio

Local interpretations on malaria and the discourse on the traditional health care providers in southern Mozambique

The narratives on the diagnosis and causes of malaria are diverse and apparently ambiguous, being based beyond the body, on the social relations among peers, their ancestors, and nature. Based on a qualitative study and a four-year stay in Mozambique, this article analyzes the discourses of patients and biomedical practitioners on traditional health care providers, i.e., tinyanga and zion pastors, linking them to local terminology of malaria, in a rural district in southern Mozambique. In the current context of therapeutic pluralism and high mobility, the lack of solidarity and compassion attributed to tinyanga is supported by the monetization and commodification of their medicinal rituals and knowledge, as well as by competition with other providers in attracting patients. The implementation of zion churches, of Christian nature and performing therapeutic practices similar to tinyanga, is presented as a local advantageous solution due to the strong community connection, the comfort and reciprocity among the members, and the therapeutic results at low cost. In terms of health care policies and clinical practice, the invisibility of zion pastors and the subordinate role of healers is managed according to interests, based on vague ideas and prejudices from biomedical providers. The implementation of health policies that address the local diversity, the existing power relations and medical knowledge and practices can strengthen the biomedical care services and harmonize relations between the providers and the population.info:eu-repo/semantics/publishedVersio

Kounis Syndrome Associated With Selective Anaphylaxis to Cefazolin.

info:eu-repo/semantics/publishedVersio

Mariner 9 Solar Array Design, Manufacture, and Performance

The mission of Mariner 9, the first spacecraft to orbit another planet, was to make scientific observations of the surface of Mars. Throughout this unique mission, the Mariner 9 solar array successfully supported the power requirements of the spacecraft without experiencing anomalies. Basically, the design of the solar array was similar to those of Mariners 6 and 7; however, Mariner 9 had the additional flight operational requirement to perform in a Mars orbit environment mode. The array special tests provided information on the current-voltage characteristics and array space degradation. Tests indicated that total solar array current degradation was 3.5 percent, which could probably be attributed to the gradual degradation of the cover glass and/or the RTV 602 adhesive employed to cement the cover glass to the solar cell

Development and evaluation of lessons for class and group situations in grade one

Thesis (Ed.M.)--Boston Universit

The transitional dynamics of an endogenous growth model: Generalizing production functions

The final publication is available at www.degruyter.comThis paper devises a class of endogenous growth models with physical capital, human capital and product varieties. Unlike previous literature, we introduce a general specification of production that allows for disentangling the gains from specialization from the monopolistic markup. The consequences of separating both parameters on the equilibrium dynamics of the model are analyzed. We find that the long-run growth rate ceases to depend on the markup when it is disentangled from the returns to specialization, and the same happens with the conditions for saddle-path stability. Numerical simulations show that the steady-state equilibria are more prone to be stable in the model that disentangles parameters. Furthermore, the model is able to generate a rich variety of development scenarios, accounting for a number of stylized facts related to the development process of industrialized countries.Ministerio de Ciencia e Innovación; ECO2011-25490.Portugal. Fundacão para a Ciência e Tecnologia; PTDC/EGE-ECO 102238/200