Particle kinetic simulation of high altitude hypervelocity flight

In this grant period, the focus has been on the effects of thermo-chemical nonequilibrium in low-density gases, and on interactions between such gases and solid surfaces. Such conditions apply to hypersonic flows of re-entry vehicles, and to the expansion plumes of small rockets. Due to the nonequilibrium nature of these flows, a particle approach has been adopted. The method continues to undergo refinement and application to typical flows of interest. A number of studies have been performed for flows in thermo-chemical nonequilibrium. The effects of vibrational nonequilibrium on the rate of dissociation were studied for diatomic nitrogen. It was found that a new model reproduced the nonequilibrium behavior observed experimentally

Accommodating care

In this article, I explore how medical care responsibilities in the United States are shifting away from formal clinical contexts and into the home. Using organ transplant-related care as an illustrative example of this larger phenomenon, I trace the incorporation of health care into the home using three cases from ethnographic fieldwork near a major transplant center in the midwestern United States. Here, patients and loved ones transform their dwellings, lives, and relationships to attend to the demands of transplant medicine. Bringing together literature on hospitality, caregiving, houses and homes, and place and space in health care, I offer ‘accommodating care’ as a framework for understanding the materializing practices of home-based transplant care. This approach suggests avenues toward studying larger questions about the distinctiveness and overlap of medicine and home life

Living with transplant

Organ transplantation is often held to epitomize the power and promise of biomedicine. Yet life after transplant does not so clearly mark an ‘after’ to illness, and instead requires close monitoring and treating for organ rejection, graft failure, or the side effects of medication regimens. Such medical domains are counterbalanced, in turn, by relations of kinship, friendship, home and work life. In this Position Piece, I call for attention to the interconnected tensions among these domains, focusing on one illustrative case example: that of Janet, a three-time kidney recipient. By detailing Janet’s lifelong imbrication of daily life with vulnerability and biomedical intervention, I delineate the mismatch between popular imaginings of transplant as ‘cure’ and the realities of living a life that is never quite beyond illness

Detailed analysis of radiation data from the Gemini 4 and Gemini 7 proton-electron spectrometer experiments Final report, 13 Jun. 1967 - 30 Dec. 1968

Detailed analysis of radiation data from Gemini 4 and 7 proton-electron spectrometer experiment

Uso do modelo de simulação Oryza/Apsim 2000 na definição da população de plantas para o arroz de terras altas.

Com este trabalho se propôs simular a resposta do arroz de terras altas a diferentes populações de plantas, em várias épocas de semeadura, com o modelo de simulação do crescimento, desenvolvimento e produtividade ORYZA/APSIM 2000, visando maximizar a produtividade dessa cultura. Para tanto, considerou-se as populações de plantas de 100, 150, 250 e 450 plantas m-2, as quais foram combinadas com cinco datas de semeadura: 01/11, 15/11, 01/12, 15/12 e 31/12. A produtividade de grãos simulada do arroz de terras altas apresentou resposta quadrática à população de plantas, com valores máximos sendo alcançados com populações acima de 350 plantas m-2. Contudo, considerando a maior eficiência técnica, as menores populações de plantas testadas são as mais adequadas. Há maior probabilidade de se obter altas produtividades de arroz de terras altas em datas de semeadura precoces, a partir de 01/11.bitstream/item/46422/1/boletimdepesquisa-36.pd

Determining optimum sowing date for early upland rice cultivar using modelling approach.

The objective of this study was to determine the optimum sowing date for early upland rice cultivar at Santo Antonio de Goiás, GO, Brazil. To optimize solar radiation and precipitation during the upland rice sowing period (from November to December) it was used the crop model RICE06 from Ecotrop plataform. To mimic the conditions of region, two scenarios were created: a) no restriction to root development (0.8 m effective root depth) and b) restrictions to root development (Al toxic in the subsoil ? 0.4 m effective root depth). The crop model was run based on the climate historical date (22 years of daily data for precipitation, solar radiation, maximum and minimum temperature, maximum and minimum relative humidity, and wind speed) collected at Embrapa Rice & Beans weather station. Five different sowing dates (01/11, 15/11, 1/12, 15/12, and 31/12) were taken into account. The decision criterions used to determine the optimum sowing date were the variability, comparison of exceedance probability and mean variation for yield and the averaged index stress factor. The results obtained showed that the optimum sowing date for both scenarios was 15-Nov