Kinetics of exciton photoluminescence in type-II semiconductor superlattices

The exciton decay rate at a rough interface in type-II semiconductor superlattices is investigated. It is shown that the possibility of recombination of indirect excitons at a plane interface essentially affects kinetics of the exciton photoluminescence at a rough interface. This happens because of strong correlation between the exciton recombination at the plane interface and at the roughness. Expressions that relate the parameters of the luminescence kinetics with statistical characteristics of the rough interface are obtained. The mean height and length of roughnesses in GaAs/AlAs superlattices are estimated from the experimental data.Comment: 3 PostScript figure

Influence

Terapi Antiretroviral (ARV) merupakan sesuatu pengobatan pada HIV/AIDS, tetapi ketidak tahuan mereka akan informasi yang berkaitan dengan terapi antiretroviral (ARV) akan menimbulkan ketidak patuhan konsumsi obat (ARV). Penelitian ini betujuan untuk menganalisis Pengaruh Pendidikan dan pekerjaan orang tua terhadap kepatuhan konsusmsi obat ARV pada anak HIV/AIDS. Desain penelitian yang digunakan kuantitatif dengan pendekatan cross sectional. Metode yang digunakan adalah Survei Analitik dengan pengambilan sampel secara Total Sampling. Penelitian ini hampir dilakukan selama 3 bulan dengan mendapatkan data langsung pada orangtua yang memiliki anak HIV/AIDS. Selanjutnya penelitian yang dilakukan, bahwa tingkat pendidikan dan pekerjaan orangtua memberikan pengaruh signifikat terhadap tingkat kepatuhan anak dalam konsumsi ARV. Analisa data yang digunakan adalah uji Paired Sample T-Test. Kesimpulan dari penelitian ini : Ada pengaruh pendidikan terhadap kepatuhan ARV, dan ada pengaruh pekerjaan terhadap kepatuhan ARV. di RSUD Waluyo Djati Kraksaan Kabupaten Probolinggo

Space Architecture: The Role, Work and Aptitude

Space architecture has been an emerging discipline for at least 40 years. Has it arrived? Is space architecture a legitimate vocation or an avocation? If it leads to a job, what do employers want? In 2002, NASA Headquarters created a management position for a space architect whose job was to "lead the development of strategic architectures and identify high level requirements for systems that will accomplish the Nation's space exploration vision." This is a good job description with responsibility at the right level in NASA, but unfortunately, the office was discontinued two years later. Even though there is no accredited academic program or professional licensing for space architecture, there is a community of practitioners. They are civil servants, contractors and academicians supporting International Space Station and space exploration programs. In various ways, space architects currently contribute to human spaceflight, but there is a way for the discipline to be more effective in developing solutions to large scale complex problems. This paper organizes contributions from engineers, architects and psychologists into recommendations on the role of space architects in the organization, the process of creating and selecting options, and intrinsic personality traits including why they must have a high tolerance for ambiguity

Influence of substrate types and reflector proximities over a NDTC antenna

The influence of dissimilar substrates and reflector proximities over a newly developed Non-uniformly Distributed-Turns Coil (NDTC) antenna for High-Frequency (HF) Radio Frequency IDentification (RFID) applications is presented. In the study, the performance of the HF-RFID NDTC antenna over various substrates with deposited conductor thicknesses is conducted. In addition, the effect over a conceivably encountered reflector in the proximity of the antenna is considered. Insensitive reflection coefficient (S11) responses for different substrate permittivities were experienced and the diverse conductor types and thicknesses contributed to a compromised magnetic-field (H-field) and recalculated matching network. The matching network additionally preserves resonance when the antennas is in close proximity to the reflector and a predictable H-field response for the separation range is shown

Influence of Quality Improvement Activities and Direct Selling Through Mediated Partnership Model on Supply Chain, Farm-Gate Price and Indonesian Households Specialty Coffee Farmers' Income

The low farm-gate price of agricultural commodities is commonly caused by low quality and complicated value chain. Quality improvement and direct selling through Mediated Partnership Model (Motramed) are conducted to increase farm-gate price and bargaining power of smallholder farmers. In Indonesia, Motramed has been applied in several coffee producing regions, such as Flores, Kintamani and East Java. This research aimed to understand the influence of quality improvement and direct selling activities through Motramed on market chain, farm-gate price and household coffee farmers' income in Indonesia. This research was conducted in Kintamani in 2013. This research also used farm-gate data in several specialty coffee producing regions, including Flores (Bajawa and Ruteng), Kintamani and East Java that collected during 2010 and 2011. I incorporated both quantitative and qualitative research methods to explore and analyse the data. Household farmer survey, semi-structured interview with coffee stakeholders including farmers, collectors, exporters, government officials and NGOs; and field observation were used for collecting the data. The research shows that quality improvement activity in the farm level and direct selling through Motramed ha

The Influence of Organizational Commitment and Motivation on Lecturer Performance of Pamulang University

This study aims to determine the effect of organizational commitment and motivation on lecturer performance of Pamulang University. The research method used is quantitative. The number of samples used is 200 respondents with the Slovin formula, and the sample technique used is proporsionate random sampling. Analytical methods used are multiple linear regression, consist of descriptive analysis, validity test, reliability test, classical assumption test, partial test, simultaneous test and test of determination. Result of research proves organizational commitment have significant effect to lecturer performance equal to 0,485. Motivation has a positive and significant effect on lecturer\u27s performance of 0.304. Simultaneously commitment and motivation have a significant effect on performance with contribution of 44.5

Influence of climatic variables on crown condition in pine forests of Northern Spain

Producción CientíficaThe aim of this study was to find relationships between crown condition and some climatic parameters to identify which are those having a main influence on crown condition, and how this influence is shown in the tree (crown transparency), and to contribute to the understanding of how these parameters will affect under future climate change scenarios