69 research outputs found
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Life in the Atacama — Year 2: Geologic reconnaissance through long-range roving and implications on the search for life
The Life in the Atacama-2004 project, which included geological, morphological, and mineralogical mapping through combined satellite, field-based, and microscopic perspectives and long-range roving, led to the localization of potential habitats
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Spectroscopic results from the Life in the Atacama (LITA) project 2004 field season
Analysis of spectroscopy datasets from rover field tests in the Atacama Desert (Chile), focusing on the composition of the surface and identification of potential habitats for life
Research productivity and academics’ conceptions of research
This paper asks the question: do people with different levels of research productivity
and identification as a researcher think of research differently? It discusses a
study that differentiated levels of research productivity among English and Australian
academics working in research-intensive environments in three broad discipline areas:
science, engineering and technology; social science and humanities; and medicine and
health sciences. The paper explores the different conceptions of research held by these
academics in terms of their levels of research productivity, their levels of research training,
whether they considered themselves an active researcher and a member of a research team,
and their disciplinary differences
Bimolecular recombination coefficient as a sensitive testing parameter for low-mobility solar-cell materials
Bimolecular charge carrier recombination has been clarified in bulk-heterojunction solar cells based on a blend of regioregular poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]- methanofullerene using the time-of-flight method. We show how bimolecular recombination influences the charge carrier transport, how it limits the efficiency of low-mobility solar cells, and how to estimate the bimolecular recombination coefficient. We found that bimolecular recombination in these efficient photovoltaic materials is orders of magnitude slower as compared to Langevin recombination expected for low-mobility materials. This effect is inherent to the nanomorphology of the bicontinuous interpenetrating network creating separate pathways for electrons and holes, and paves the way for the fabrication of bulk-heterojunction solar cells where bimolecular recombination is not the limiting factor
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