Transient Aero-Thermal Mapping of Passive Thermal Protection System for Nose-Cap of Reusable Hypersonic Vehicle

The temperature field history of passive Thermal Protection System (TPS) material at the nose-cap (forward stagnation region) of a Reusable Hypersonic Vehicle (RHV) is generated. The 3-D unsteady heat transfer model couples conduction in the solid with external convection and radiation that are modeled as time-varying boundary conditions on the surface. Results are presented for the following two cases: (1) nose-cap comprised of ablative TPS material only (SIRCA/PICA), and (2) nose-cap comprised of a combination of ablative TPS material with moderate thermal conductivity and insulative TPS material. Comparison of the temperature fields of SIRCA and PICA [Case (1)] indicates lowering of the peak stagnation region temperatures for PICA, due to its higher thermal conductivity. Also, the use of PICA and insulative TPS [Case (2)] for the nose-cap has higher potential for weight reduction than the use of ablative TPS alone

Comparative evaluation of salivary zinc concentration in autistic and healthy children in mixed dentition age group-pilot study

Context: Autism prevalence is increasing, with current estimates at 1/68–1/50 individuals diagnosed with autism. Diagnosis is based on behavioral assessments. Early diagnosis and intervention are known to greatly improve functional outcomes in people with autism. Diagnosis, treatment monitoring, and prognosis of autistic children's symptoms could be facilitated with biomarkers to complement behavioral assessments. Aims: The aim of this study is to compare and evaluate salivary zinc concentration in saliva samples of autistic and healthy children in mixed dentition age group. Settings and Design: Cross-sectional comparative study carried out in dental college and special child school. Unstimulated whole saliva collected for finding a biomarker. Subjects and Methods: Unstimulated whole saliva sample was collected from 10 autistic and 10 healthy children in mixed dentition age group. Diluted saliva sample was then subjected to inductively coupled plasma emission spectroscopy for the estimation of salivary zinc concentration. Statistical Analysis Used: Mann–Whitney U-test. Results: In children with autism salivary zinc concentration showed a linear equation when compared to healthy children. Conclusions: The low salivary zinc concentration in autistic children can reveal the pathogenesis of autism

Effects of nutrient foliar sprays containing growth regulators on productivity of peanut (Arachis hypogaea L. cv. Tatu-53)

Para se verificar o efeito da aplicação de adubo foliar com fitoreguladores na produtividade do amendoinzeiro cultivar Tatu - 53, realizou-se ensaio em condições de campo, em uma Terra Roxa Estruturada, na Faculdade de Ciências Agrárias de Jaboticabal (SP). 0 experimento constou da aplicação, em diferentes épocas, do adubo foliar Unifol com fitoreguladores nas formulações (18-12-6) e (7-23-7) para NPK. Para isto efetuaram - se os tratamentos controle sem adubação, adubação no solo de 250 kg/ha da fórmula (9-30--16), Unifol (18-12-6) aplicado 23 dias após a emergência, Unifol (18-12-6) aplicado no início do florescimento, Unifol (18-12-6) aplicado em pleno florescimento e Unifol (18-12-6) aplicado 23 dias após a emergência + Unifol (7-23-7) no início do florescimento. Devido a fertilidade do solo utilizado, não se verificaram diferenças significativas entre os tratamentos. Observou - se porém uma tendência de aumento no numero de vagens, peso de 100 sementes e produção de sementes, quando se aplicou Unifol (18-12-6) 23 dias após a emergência + Unifol (7-23 -7) no início do florescimento. Aplicação e NPK (9-30-16) na concentração de 250 kg/ha, por ocasião do plantio, tendeu a aumentar a produção de sementes e o peso da palhada do amendoinzeiro.The effects of the application of a macronutrient foliar spray combined with micronutrients and growth regulators (Unifol) on peanut grown in a soil with high fertility were investigated. A control without fertilizer and a soil fertilization (250 kg/ha) with NPK 9-30-16 were also established. Other treatments were as follows: Unifol fertilizer (18-12 16) applied 23 days after germination: Unifol (18-12-6) applied at the beginning of flowering; Unifol (18-12-6) applied during flowering, and Unifol (18-12-6) applied 23 days after germination plus Unifol (7-23-7) at the beginning of flowering. No significant differences were found amongst treatments, but certain treatments showed higher productivity e given Unifol fertilizer (18-12-6) applied 23 days after germination plus Unifol (7-23-7) at the flower anthesis. In this treatment, the number of pods, weight of seeds and production of seeds were higher. Best production of forage occurred in the treatment receiving soil fertilization