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Search Results: 1 - 10 of 652 matches for " the UIT Team "
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Luminosities and Star Formation Rates Of Galaxies Observed With the Ultraviolet Imaging Telescope: A Comparison of Far-UV, H-alpha, and Far-IR Diagnostics
Michael N. Fanelli,Theodore P. Stecher,the UIT Science Team
Physics , 1996, DOI: 10.1063/1.52770
Abstract: During the UIT/Astro Spacelab missions, the Ultraviolet Imaging Telescope obtained spatially resolved far-UV (lambda 1500 A) imagery of ~35 galaxies exhibiting recent massive star formation. The sample includes disk systems, irregular, dwarf, and blue compact galaxies. The objects span an observed FUV luminosity range from -17 to -22 magnitudes. We estimate global star formation rates by comparing the observed FUV fluxes to the predictions of stellar population models, and compare the FUV-derived astration rates to those derived from H-alpha and far-IR photometry.
Ultraviolet Imaging Telescope (UIT) Observations of the SMC
Robert H. Cornett,Theodore P. Stecher,the UIT Science Team
Physics , 1996,
Abstract: A mosaic of four UIT far-UV (FUV; 1620A) images, which covers most of the SMC bar, is presented, with derived stellar and HII region photometry. The UV morphology of the SMC's Bar shows that recent star formation there has left striking features including: a) four concentrations of UV-bright stars spread from northeast to southwest at nearly equal (~30 arcmin=0.5 kpc) spacings; b) one concentration comprising a well-defined 8-arcmin diameter ring surrounded by a larger H-alpha ring, suggestive of sequential star formation. FUV PSF photometry is obtained for 11,306 stars, and FUV photometry is obtained for 42 H-alpha-selected HII regions, both for the stars and for the total emission contained in the apertures defined by Kennicutt & Hodge. The flux- weighted average ratio of total to stellar FUV flux is 2.15; the stellar FUV luminosity function indicates that most of the excess total flux is due to scattered FUV radiation, rather than faint stars. Both stellar and total emission are well correlated with H-alpha fluxes, and yield FUV/H-alpha ratios that are consistent with models of single-burst clusters with SMC metallicity, ages from 1-5 Myr, and moderate (E(B-V)=0.0-0.1 mag) internal SMC extinction.
UIT Astro-2 Observations of NGC 4449
Robert S. Hill,Michael N. Fanelli,Denise A. Smith,Theodore P. Stecher,the UIT Team
Physics , 1996, DOI: 10.1063/1.52826
Abstract: The bright Magellanic irregular galaxy NGC 4449 was observed by the Ultraviolet Imaging Telescope (UIT) during the Astro-2 Spacelab mission in March, 1995. Far ultraviolet (FUV) images at a spatial resolution of ~3 arcsec show bright star-forming knots that are consistent with the general optical morphology of the galaxy and are often coincident with bright H II regions. Comparison of FUV with H-alpha shows that in a few regions, sequential star formation may have occurred over the last few Myr. The bright star forming complexes in NGC 4449 are superposed on a smooth, diffuse FUV background that may be associated with the H-alpha "froth."
Non-additive functors and Euler characteristics
Niels uit de Bos,Lenny Taelman
Mathematics , 2014,
Abstract: We show under suitable finiteness conditions that a functor between abelian categories induces a (not necessarily additive) map between their Grothendieck groups. This is related to the derived functors of Dold and Puppe, and generalizes a theorem of Dold.
Editorial Team Editorial Team
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v82i2.50
Editorial Board - Perspective in Industrial Psychology
Editorial Team
South African Journal of Industrial Psychology , 1975, DOI: 10.4102/sajip.v0i0.267
IOMC Conference: Sharing medical knowledge beyond geographical boarders
Archives of Pharmacy Practice , 2010,
Abstract: International Online Medical Conference (IOMC) has been one of the most innovative conferences in the world that has been increasingly welcomed by medical & healthcare experts, researchers, professionals, students, and professors from around the globe. Building upon the success of numerous years of organizing this event in 2008, 2009 and 2010, the IOMC conferences have aimed to foster the discussion among medical, nursing and healthcare researchers and provide them with the opportunity to discuss and present their research findings, studies, and experiences at a professional level and share their research works with the world, regardless of geographical boarders and at ease of access
Editorial Team
Condensed Matter Physics , 2011,
Editorial team
Condensed Matter Physics , 2012,
Abstract: Dear colleagues and readers of our journal Thank you for your collaboration in 2011, during which four other issues of "Consensed Matter Physics" were published. You are welcome to submit manuscripts covering research in various areas of Condensed and Soft Matter Physics with the special priority given to review papers in fast developing topics. This year the impact factor of "Condensed Matter Physics" has risen to 0.8 for the first time. We see this as a cooperative achievement as far as our small scale journal is published by a scientific institution rather than by a publishing house. We hope to progress in this area in the years that follow. In 2011 we introduced an open-access publishing model, the integral part of which are the uploading of the article metadata to the Directory of Open Access Journals (DOAJ Content) and submission of all the papers to arXiv server of preprints. We believe that in that way a wider set of search engines will be involved and, as a result, a wider audience will be introduced to the papers published in "Condensed Matter Physics". As usual, we plan four issues for 2012. Two of them are special issues, one will contain proceedings of the 4th Conference on Statistical Physics: Modern Trends and Applications (July 5-6, 2012, Lviv). Another will be devoted to the 60th birthday of Dr. Orest Pizio (Universidad Nacional Autonoma de México, México). We also plan to introduce in 2012 an open source journal management system aimed at simplifying the on-line submitting/refereeing/proofreading of manuscripts for the authors and for our staff. We hope for continuation of our collaboration this year and wish sizeable scientific achievements to all of you. Your editorial team
Closure of the NCBI SRA and implications for the long-term future of genomics data storage
GB Editorial Team
Genome Biology , 2011, DOI: 10.1186/gb-2011-12-3-402
Abstract: DL: NCBI was facing budgetary constraints and presented a range of options to the National Institutes of Health (NIH) leadership, who chose to phase out the SRA along with other resources. One factor in making the determination was the understanding that because the raw sequence data within the SRA are processed into derived forms in order to answer the underlying biological questions, as methods mature, the SRA was seen as a transitional resource. The SRA primarily has been used by a relatively small community of project analysts and researchers working on methods development in genome scale research projects.PF: The SRA isn't closing. It started as a joint venture between the NCBI and the EBI, so the NCBI ceasing to accept submissions doesn't meant that the SRA is closing, merely changing and the European Nucleotide Archive (ENA) at EMBL-EBI will remain. The NCBI's decision was based on budgetary constraints. It should be noted that most people don't realize that storage space is only a minor fraction of the budget of the database; the bulk of the cost is associated with the staff who maintain the database, process the submissions, develop the software and so on.SS: From the outside, it appears that the SRA is closing because of NIH budgetary considerations. One problem is that the amount of sequence being generated is growing at an extraordinary rate, probably faster than increases to the budget. My group uses the SRA a lot. Due to the nature of our work, we rely on it maybe more than others. We download data reasonably frequently, but because of the size of the datasets we try not to do it too often.RK: The SRA was widely disliked by a lot of users, in particular because it was hard to get data. Partly that was because of poor standards for metadata associated with the data entries. This makes it hard to find the samples you were looking for. It wasn't set up for projects that were generating many samples at a time, and multiplexing with barcoded samples was als
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