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Artykuły w czasopismach na temat "National University (San Diego, Calif.)"
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Paladichuk, A. "Chronic disease management: an outpatient approach". Critical Care Nurse 17, nr 6 (30.12.1997): 90–95. http://dx.doi.org/10.4037/ccn1997.17.6.90.
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The current climate of managed care has sparked efforts to reduce costs in patient care. In many cases, this has resulted in more efficient methods of patient management: chronic disease management in an outpatient setting appears to be one such success story. For critical care nurses interested in working beyond the boundaries of a traditional ICU, chronic disease management clinics represent an alternative environment in which they may apply their skills. Nancy Brass-Mynderse, RN, MSN, CCRN, a clinical nurse specialist (CNS) with 18 years of experience in critical care, was instrumental in development of the Scripps Health Chronic Disease Clinic at Green Hospital of Scripps Clinic, San Diego, Calif. Brass-Mynderse currently supervises the operation of the clinic, along with Omana Kaliangara, RN, MSN, CFNP, a nurse practitioner. Brass-Mynderse received her bachelor's degree from the University of Arizona, Tucson, Ariz, and her master's degree from San Diego State University. She recently obtained her family nurse practitioner certificate from California State University, Dominguez Hills, Calif. Kaliangara received her bachelor's degree from San Jose State University, San Jose, Calif, and her nurse practitioner certificate from the University of California, San Francisco, Calif. After working in family medicine and a diabetic clinic, Kaliangara developed an interest in the management of chronic diseases. In an interview with CRITICAL CARE NURSE in September, Brass-Mynderse and Kaliangara took time to discuss the development and operation of the clinic, and to recount some of their success stories.
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Ehlers, V. J. "Visit to the National University, San Diego, USA: 30 July 1999". Health SA Gesondheid 5, nr 1 (23.10.2000): 64–66. http://dx.doi.org/10.4102/hsag.v5i1.23.
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The National University was founded in 1971 as an independent, non-profit institution of higher learning, focusing on the unique needs of midcareer adult learners, who are not seeking traditional residential university programmes. According to its information brochure, the National University is the third largest private university in California. More than 60 000 students had completed their studies in the arts and sciences, business, education, human services, nursing and technology at the beginning of 1999.
*Please note: This is a reduced version of the abstract. Please refer to PDF for full text.
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Watry, Paul. "Digital Preservation Theory and Application: Transcontinental Persistent Archives Testbed Activity". International Journal of Digital Curation 2, nr 2 (2.12.2008): 41–68. http://dx.doi.org/10.2218/ijdc.v2i2.28.
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The National Archives and Records Administration (NARA) and EU SHAMAN projects are working with multiple research institutions on tools and technologies that will supply a comprehensive, systematic, and dynamic means for preserving virtually any type of electronic record, free from dependence on any specific hardware or software. This paper describes the joint development work between the University of Liverpool and the San Diego Supercomputer Center (SDSC) at the University of California, San Diego on the NARA and SHAMAN prototypes. The aim is to provide technologies in support of the required generic data management infrastructure. We describe a Theory of Preservation that quantifies how communication can be accomplished when future technologies are different from those available at present. This includes not only different hardware and software, but also different standards for encoding information. We describe the concept of a “digital ontology” to characterize preservation processes; this is an advance on the current OAIS Reference Model of providing representation information about records. To realize a comprehensive Theory of Preservation, we describe the ongoing integration of distributed shared collection management technologies, digital library browsing, and presentation technologies for the NARA and SHAMAN Persistent Archive Testbeds.
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Beckman, Peter H. "Building the TeraGrid". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 363, nr 1833 (18.07.2005): 1715–28. http://dx.doi.org/10.1098/rsta.2005.1602.
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On 1 October 2004, the most ambitious high-performance Grid project in the United States—the TeraGrid—became fully operational. Resources at nine sites—the San Diego Supercomputer Center, the California Institute of Technology, the National Center for Supercomputing Applications, the University of Chicago/Argonne National Laboratory, Pittsburgh Supercomputing Center, Texas Advanced Computing Center, Purdue University, Indiana University and Oak Ridge National Laboratory—were joined via an ultra-fast optical network, unified policies and security procedures and a sophisticated distributed computing software environment. Funded by the National Science Foundation, the TeraGrid enables scientists and engineers to combine distributed, multiple data sources with computation at any of the sites or link massively parallel computer simulations to extreme-resolution visualizations at remote sites. A single shared utility lets multiple resources be easily leveraged and provides improved access to advanced computational capabilities. One of the demonstrations of this new model for using distributed resources, Teragyroid, linked the infrastructure of the TeraGrid with computing resources in the United Kingdom via a transatlantic data fibre link. Once connected, the software framework of the RealityGrid project was used to successfully explore lattice-Boltzmann simulations involving lattices of over one billion sites.
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Minor, David, Don Sutton, Ardys Kozbial, Brad Westbrook, Michael Burek i Michael Smorul. "Chronopolis Digital Preservation Network". International Journal of Digital Curation 5, nr 1 (22.06.2010): 119–33. http://dx.doi.org/10.2218/ijdc.v5i1.147.
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The Chronopolis Digital Preservation Initiative, one of the Library of Congress’ latest efforts to collect and preserve at-risk digital information, has completed its first year of service as a multi-member partnership to meet the archival needs of a wide range of domains.Chronopolis is a digital preservation data grid framework developed by the San Diego Supercomputer Center (SDSC) at UC San Diego, the UC San Diego Libraries (UCSDL), and their partners at the National Center for Atmospheric Research (NCAR) in Colorado and the University of Maryland's Institute for Advanced Computer Studies (UMIACS).Chronopolis addresses a critical problem by providing a comprehensive model for the cyberinfrastructure of collection management, in which preserved intellectual capital is easily accessible, and research results, education material, and new knowledge can be incorporated smoothly over the long term. Integrating digital library, data grid, and persistent archive technologies, Chronopolis has created trusted environments that span academic institutions and research projects, with the goal of long-term digital preservation.A key goal of the Chronopolis project is to provide cross-domain collection sharing for long-term preservation. Using existing high-speed educational and research networks and mass-scale storage infrastructure investments, the partnership is leveraging the data storage capabilities at SDSC, NCAR, and UMIACS to provide a preservation data grid that emphasizes heterogeneous and highly redundant data storage systems.In this paper we will explore the major themes within Chronopolis, including:a) The philosophy and theory behind a nationally federated data grid for preservation. b) The core tools and technologies used in Chronopolis. c) The metadata schema that is being developed within Chronopolis for all of the data elements. d) Lessons learned from the first year of the project.e) Next steps in digital preservation using Chronopolis: how we plan to strengthen and broaden our network with enhanced services and new customers.
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Georgakakos, Konstantine P. "US corporate technology transfer in hydrometeorology". Journal of Hydroinformatics 4, nr 1 (1.01.2002): 3–13. http://dx.doi.org/10.2166/hydro.2002.0002.
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Corporate technology transfer by US non-governmental organizations with the substantial involvement of university faculty is a new activity in hydrometeorology. The issues involved in such US corporate technology transfers are discussed by way of two examples selected from the activities of the Hydrologic Research Center, a non-profit-making public-benefit research and technology transfer corporation in San Diego, California, USA. The projects discussed are: (a) the development and implementation of a robust state estimator for national use within the US National Weather Service River Forecast System, and (b) the development and implementation of a prototype multi-sensor rainfall forecasting system for the Panama Canal Authority. The issues covered include technical ones associated with improving theoretical formulations for robust operational performance, those associated with the necessary reciprocal education between modellers and field personnel, and the accommodation of the educational objectives of participating postdoctoral associates.
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Blashill, Aaron J., Janna R. Gordon, Sarah A. Rojas, Christian B. Ramers, Chii-Dean Lin, Claudia M. Carrizosa, Kelsey A. Nogg i in. "Pilot randomised controlled trial of a patient navigation intervention to enhance engagement in the PrEP continuum among young Latino MSM: a protocol paper". BMJ Open 11, nr 5 (maj 2021): e040955. http://dx.doi.org/10.1136/bmjopen-2020-040955.
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IntroductionMen who have sex with men (MSM) are one of the most at-risk group for contracting HIV in the USA. However, the HIV epidemic impacts some groups of MSM disproportionately. Latino MSM comprise 25.1% of new HIV infections among MSM between the ages of 13 and 29 years. The daily medication tenofovir/emtricitabine was approved by the Food and Drug Administration for pre-exposure prophylaxis (PrEP) in 2012 and has demonstrated strong efficacy in reducing HIV acquisition.Methods and analysisThrough extensive formative research, this study uses a pilot randomised controlled trial design and will examine the feasibility and acceptability of a patient navigation intervention designed to address multiple barriers to improve engagement in the PrEP continuum among 60 Latino MSM between the ages of 18 and 29 years. The patient navigation intervention will be compared with usual care plus written information to evaluate the feasibility and acceptability of the intervention and study methods and the intervention’s potential in improving PrEP continuum behaviours. The results will be reviewed for preparation for a future full-scale efficacy trial.Ethics and disseminationThis study was approved by the institutional review board at San Diego State University and is registered at ClinicalTrials.gov. The intervention development process, plan and the results of this study will be shared through peer-reviewed journal publications, conference presentations and healthcare system and community presentations.Registration detailsRegistered under the National Institutes of Health’s ClinicalTrials.gov (NCT04048382) on 7 August 2019 and approved by the San Diego State University (HS-2017–0187) institutional review board. This study began on 5 August 2019 and is estimated to continue through 31 March 2021. The clinical trial is in the pre-results stage.
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Salimi, Rana. "The Female Bomber's Body in Performance". New Theatre Quarterly 30, nr 1 (luty 2014): 51–64. http://dx.doi.org/10.1017/s0266464x14000074.
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Following the rules of self-sacrifice for a higher cause, the Palestinian female bomber performs the values of the struggle through and on her body in a farewell video statement. She leaves herself behind to create an image of a strong and victorious soldier. The female bomber's performance of the new self introduces her as a role model for younger generations. Her public appearance in hijab challenges notions of the body, physical beauty, and freedom in the secularist world at the same time as it deviates from the norms of a fundamentalist view of women. It is the dual impact on local and international viewers that politicizes the female bomber's public performance and makes it significant. Rana Salimi has received her PhD from the Department of Theatre and Dance at the University of California, San Diego. She currently lectures at UCSD and at National University on a variety of subjects, including theatre history and language arts.
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Farid, Marjan. "Pearls for Secondary Intraocular Lens Implantation". US Ophthalmic Review 10, nr 01 (2017): 13. http://dx.doi.org/10.17925/usor.2017.10.01.13.
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Marjan Farid is Director of the Cornea, Cataract, and Refractive Surgery Faculty and Vice-chair of the Ophthalmic Faculty at the Gavin Herbert Eye Institute (GHEI) at the University of California, Irvine (UCI), California, US. Dr Farid’s clinical practice is divided between patient care, teaching, and research. She enjoys teaching ophthalmology to medical students, ophthalmology residents, and cornea fellows. She serves on the Residency Education Committee and is the Director of the cornea fellowship program at the GHEI. Her research interests focus on corneal surgery, specifically in the use of the femtosecond laser for corneal transplantation. She performs all forms of corneal transplantation—femtosecond enabled and lamellar keratoplasty (DSEK and DALK). Dr Farid is also the founder of the severe ocular surface disease center at UCI. She performs limbal stem cell transplants, as well as artificial corneal transplantation for the treatment of patients with severe ocular surface disorders. She serves as an associate medical director for the Sight Life Eye Bank. Her work has been published in numerous peer-reviewed journals, she has authored six textbook chapters, and travels to multiple national meetings to present her research work. She serves as an Editorial Board member of Ophthalmology, the leading journal in her field. Dr Farid graduated summa cum laude from UCLA with a degree in biology. She earned her medical degree at UC-San Diego in 2002 and completed a transitional year internship at Scripps-Mercy Hospital in San Diego. She completed her residency training in ophthalmology at UCI. She subsequently completed her fellowship training in the area of cornea/external disease and refractive surgery under the mentorship of Dr Roger Steinert at UCI.
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kirkpatrick, susan. "E Pluribus Unum?" PMLA/Publications of the Modern Language Association of America 117, nr 5 (październik 2002): 1279–83. http://dx.doi.org/10.1632/003081202x61188.
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Forty years ago, when my department was established as one of the first departments of the new San Diego campus of the University of California (UCSD), its founders had a free hand to construct a new model for literary study by recasting the institutional infrastructure that traditionally divided the field by language or language group. The initial vision, as summarized in the introduction to an early graduate program review, was relatively abstract:The Department of Literature was founded […] on the uncommon but quite logical assumption that there are habits of mind and methods of inquiry peculiar to literary study, whatever the language, and that the literatures of the world have more in common than the usual departmental divisions acknowledge. […] From the standpoint of research and teaching interests, [its structure] runs counter to the provincialism that afflicts many departments of single national literatures.(“Graduate Program Review”)
Książki na temat "National University (San Diego, Calif.)"
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Calif.). Library National University (San Diego. Library connections: National University library system newsletter. San Diego, CA: National University Library, 1991.
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Calif.). Library National University (San Diego. The library letter: National University library system newsletter. San Diego, CA: National University Library, 1990.
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Calif.). Human Resources Office National University (San Diego. National notes. [San Diego]: Human Resources Office, 1996.
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Calif.). Library National University (San Diego. Bringing the library to the user: The National University Library System strategic plan 2015. [San Diego, CA]: National University, 2010.
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Calif.). Office of the President National University (San Diego. President's report to the university. La Jolla, CA: Office of the President, National University, 1996.
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Calif.) National University (San Diego. NU 2005: A strategic plan. [La Jolla, CA]: National University, 2002.
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Calif.). Vice President of External Relations National University (San Diego. NUwsletter. San Diego, CA: Vice President of External Relations, 1989.
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Calif.). Vice President for External Relations National University (San Diego. NUsletter. San Diego, CA: Vice President for External Relations and the News Bureau, 1989.
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Calif.). Human Resources Dept National University (San Diego. NU teamspirit. San Diego: National University, 1995.
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Calif.) National University (San Diego. NU 2010: A strategic plan. [La Jolla, CA]: National University, 2005.
Znajdź pełny tekst źródłaCzęści książek na temat "National University (San Diego, Calif.)"
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Brugman, Claudia. "Inalienability and the Interpretation of Modified Noun Phrases". W Grammatical Constructions, 1–28. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780198235392.003.0001.
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Abstract This paper was completed during a research fellowship funded by the National Endowment for the Humanities Fellowships for College and University Teachers Program. The endowment is herewith thanked for its support. Thanks also to Jeff Elman and Elizabeth Bates, directors of the Center for Research in Language, University of California, San Diego, for providing space, resources, and collegiality for that period. An early and brief mention of this phenomenon appears in Brugman (1988), completed under Professor Fillmore. Oral approximations to this paper were given at the 1989 meeting of the Linguistic Society of America, at the Purdue Linguistics Group, and at the UC San Diego Linguistics Department Colloquium. I thank the audiences at those meetings for their comments. Thanks to Michele Ernanatian, Yuki Kuroda, George Lakoff, Catherine O’Connor, Matt Shibatani, and especially Farrell Ackerman for their comments.
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Lesses, Glenn. "Virtue and the Goods of Fortune in Stoic Moral Theory". W Oxford Studies in Ancient Philosophy, 95–128. Oxford University PressOxford, 1990. http://dx.doi.org/10.1093/oso/9780198242420.003.0004.
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Abstract This paper was written with the support of the National Endowment for the I Iumanities. In the development of my thinking about these issues I owe an enormous debt to Martha Nussbaum. During many discussions on these topics, her critical remarks—incisive, yet encouraging—inevitably improved my position. I have also presented different parts of early versions of this essay at the Institute on the Virtues at the University of San Diego in Feb. 1986 and at the American Philosophical Association meeting in Boston in Dec. 1986. I am grateful to audiences on both occasions, and especially to Donald Morrison, who was the respondent at the APA. I am also grateful to A. A. Long, who generously read and made comments on an early version of this paper. Most recently, I am indebted to Julia Annas for her stimulating and detailed comments. Of course, none of those to whom I am grateful necessarily shares my views.
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Santoyo-Orozco, Ivonne. "O’Gorman, Juan (1905–1982)". W Routledge Encyclopedia of Modernism. London: Routledge, 2018. http://dx.doi.org/10.4324/9781135000356-rem2064-1.
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Perhaps the best way to understand the Mexican architect and painter Juan O’Gorman is through his self-portrait of 1950 in which he depicts himself in multiple frames corresponding to his different occupations. Juan O’Gorman was born in Mexico City of Irish descent. He graduated in 1927 from the School of Architecture of the National Autonomous University of Mexico and began his career working as a draughtsman in the studio of Obregón, Tarditi, and Villagrán García (1921–5), and, later on, as an architect for Carlos Obregón Santacilla (1925–8). At a very early age, O’Gorman designed the first functionalist houses in Mexico (1929), the most representative of this being the House-Studio of Diego Rivera (1931). For him, functionalism was to be understood as the tendency to design architecture as a work of engineering, which he understood as maximum efficiency and minimum maintenance. However, in time his designs moved towards an organic formalism influenced by the work of Frank Lloyd Wright, Antonio Gaudí, and Ferdinand Cheval, exemplified most explicitly in his house-studio in San Jeronimo (1951). Around the same time, he also designed the Central Library of the National Autonomous University Campus in the south of Mexico City, a piece that can be considered representative of O’Gorman’s various aesthetic interests: an efficiently organised slab, whose massive 4,000-sqm facade is a continuous stone and glass mosaic expressing a political and social history of Mexico.
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Taber, Douglass F. "Organocatalytic Carbocyclic Construction: The You Synthesis of (–)-Mesembrine". W Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0070.
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Frank Glorius of the Universität Münster devised (Angew. Chem. Int. Ed. 2011, 50, 12626) a catalyst for the enantioselective acylation of a cyclopropene 1 to the ketone 3. Geum-Sook Hwang of Chungnam National University and Do Hyun Ryu of Sungkyunkwan University effected (J. Am. Chem. Soc. 2011, 133, 20708) the enantioselective addition of the diazo ester 5 to an α,β-unsaturated aldehyde 4 to give the cyclopropane 6. We showed (J. Org. Chem. 2011, 76, 7614) that face-selective allylation of an α-iodo enone 7 followed by Suzuki coupling and oxy-Cope rearrangement delivered the cyclopentanone 9. Karl Anker Jørgensen of Aarhus University combined (Org. Lett. 2011, 13, 4790) two organocatalysts to effect the addition of 11 to an α,β-unsaturated aldehyde 10, leading to the cyclopentenone 12. Tomislav Rovis of Colorado State University also used (Chem. Sci. 2011, 2, 1835) two organocatalysts to condense 13 with 14 to give the cyclopentanone 15. Gregory C. Fu, now at CalTech, found (J. Am. Chem. Soc. 2011, 133, 12293) that both enantiomers of the racemic allene 16 combined with 17 to give the cyclopentene 18 in high ee. Piotr Kwiatkowski of the University of Warsaw found (Org. Lett. 2011, 13, 3624) that under elevated pressure (8–10 kbar), enantioselective conjugate addition of nitromethane proceeded well even with a β-substituted cyclohexenone 19. Marco Bella of the Università di Roma observed (Adv. Synth. Catal. 2011, 353, 2648) remarkable diastereoselectivity in the addition of the aldehyde 22 to an activated acceptor 21. Following the procedure of List, Jiong Yang of Texas A&M University cyclized (Org. Lett. 2011, 13, 5696) 24 to 25 in high ee. Bor-Cherng Hong of the National Chung Cheng University described (Synthesis 2011, 1887) the double Michael combination of 26 with 27 to give 28 in high ee. Observing a secondary 13C isotope effect only at the β-carbon of 30, Li Deng of Brandeis University concluded (Chem. Sci. 2011, 2, 1940) that the addition to 29 was stepwise, not concerted. In contrast, the cyclization of 32 to 33 reported (Org. Lett. 2011, 13, 3932) by Tadeusz F. Molinski of the University of California San Diego likely was concerted.
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Taber, Douglass F. "Substituted Benzenes: The Li Synthesis of Rubriflordilactone A". W Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0063.
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Cheol-Hong Cheon of Korea University (J. Org. Chem. 2014, 79, 7277) and Toshiyuki Kamei and Toyoshi Shimada of the Nara National College of Technology (Tetrahedron Lett. 2014, 55, 4245) described the ring bromination of arene boronates. The boronate can then be removed, enabling the conversion of 1 to 2. Yu Rao of Tsinghua University constructed (Chem. Commun. 2014, 50, 15037) the sulfone 5 by coupling the arenes 3 and 4 with K2S2O8. Igor Larrosa of Queen Mary University of London assembled (Chem. Sci. 2014, 5, 3509) the biphenyl 8 by arylating 6 with the iodide 7. Guy Bertrand of the University of California, San Diego showed (J. Am. Chem. Soc. 2014, 136, 13594) that under Au catalysis, the aniline 9 was sufficiently nucleophilic to add in a conjugate sense to the enone 10 to give 11. Hideo Togo of Chiba University optimized (Eur. J. Org. Chem. 2014, 6077) conditions for the selective ortho formylation of a phenol 12. The crude reaction mixture could also be directly oxidized with I2/ NH3 to give the nitrile 13. Silas P. Cook of Indiana University ortho metalated (J. Am. Chem. Soc. 2014, 136, 13130; Angew. Chem. Int. Ed. 2014, 53, 11065) the benzamide 14, then used an iron catalyst to couple that intermediate with a halide 15, leading to the alkylated product 16. As with the phenol 12 and the benzamide 14, aromatic functionalization has usually been directed by a functional group directly attached to the ring. Daqin Shi and Yingsheng Zhao of Soochow University showed (Chem. Sci. 2014, 5, 4962) that a longer tether can be effective, as illustrated by the conversion of 17 to 19. Debabrata Maiti of the Indian Institute of Technology Bombay also used (Org. Lett. 2014, 16, 5760) a longer tether for the selective meta functionalization of 20 to 22. Motohiro Sonoda of Osaka Prefecture University constructed (Tetrahedron Lett. 2014, 55, 5302) the phenol 25 by acid-mediated rearrangement of the Diels–Alder adduct of 24 with the furan 23. Anthony G. M. Barrett of Imperial College London devised (J. Org. Chem. 2014, 79, 8706) conditions for the iodinative cyclization of 26 to 27.
Streszczenia konferencji na temat "National University (San Diego, Calif.)"
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Beshears, David L., D. Duncan Earl, Melissa Voss Lapsa, L. Curt Maxey, Jeff D. Muhs, Christina D. Ward i John D. Morris. "Solar Energy, Collected, Concentrated, Transported, and Distributed as Light With No Energy Conversion Via a Hybrid Solar Lighting System". W ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36096.
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Hybrid solar lighting (HSL) is a technology in which sunlight is collected and distributed via optical fibers into the interior of buildings. Analogous to hybrid electric vehicles that use both batteries and internal combustion engines to power cars, hybrid lighting employs roof-mounted collectors to concentrate sunlight into flexible optical fibers and carry it inside buildings to “hybrid” light fixtures that also contain electric lamps. As the two light sources work in tandem, control systems keep lighting levels constant by dimming the electric lights when sunlight is bright, and turning them up as the sky darkens with weather conditions or nightfall. Data indicate that on a bright, sunny day the power consumption for lighting can be reduced by 50% or more. Today, lighting in U.S. residential and commercial buildings consumes close to 5 quadrillion BTUs of primary energy and one-fifth of all electricity. In commercial buildings, one-quarter of all energy demand is for lighting. With a forecasted doubling of commercial floor space by the year 2020 comes an urgent and growing need to find more efficient ways of lighting our nation’s buildings. Typically, less than 25 percent of the electrical energy consumed for lighting actually produces light; the rest generates heat, which increases the need for air-conditioning. Unlike conventional electric lamps, the sunlight from HSL systems produces virtually no waste heat. A nationwide field trial program is under way to provide system performance data and user-feedback essential for the successful commercialization of HSL. Field trial installations include San Diego State University, San Diego, CA; Pacific Northwest National Laboratory, Richland, WA; Sacramento Municipal Utility District, Sacramento, CA; Wal-Mart, McKinney, TX; Aveda Corp., Minneapolis, MN; Staples, Long Island, NY; Braden’s Furniture, Knoxville, TN; Multipurpose Research Facility, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN; University of Nevada-Las Vegas, Las Vegas, NV; Hybrid Lighting Laboratory, ORNL, Oak Ridge, TN. This paper describes the field trial program and summarizes the results to date from the field trial installations.
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Jovanovic, Velimir, Saeid Ghamaty, Daniel Krommenhoek i John C. Bass. "High Coefficient of Performance Quantum Well Thermoelectric Nano Cooler". W ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ipack2007-33838.
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Nanotechnology quantum well thermoelectric materials have been developed that have high Figures of Merit and that can attain very high coefficients of performance (COP) to satisfy the requirements for cooling room temperature detectors. Hi-Z Technology, Inc. (Hi-Z) has developed Si/SiGe solid state quantum well (QW) thermoelectric (TE) materials that have demonstrated a Seebeck coefficient and thermoelectric properties that provide >4X higher conversion efficiencies than the current bulk TE materials. With the new Si/SiGe QW materials, cooling systems can be designed that are much smaller, quieter, lighter weight, and that have much reduced power requirements than current TE materials or presently used vapor-compression systems. On-going development for these new QW TE materials has demonstrated high-efficiency TE materials for power generation applications ranging from providing power for wireless sensors to converting waste heat from diesel engine exhaust directly to electricity and thus reducing the load on the alternator and reducing fuel consumption. Now, cooling devices with a high coefficient of performance (COP) are feasible and are being designed for room temperature detector cooling applications. Multi-layer nanocomposite QW films (each 10 nm thick) were fabricated to demonstrate that Si/SiGe QW materials can be deposited on a low thermal conductivity substrate and provide at least the desired COP over the required temperature range of 250K to 350K in a single-stage nano cooler. These QW thermoelectric materials can also be implemented into commercial equipment in the air conditioning and refrigeration applications, thus eliminating fluids, ozone-impacting refrigerants and compressors. Thermoelectric properties of QW thin-film materials have been measured at Hi-Z, several universities and national labs. The conversion efficiency of QW materials has been measured at Hi-Z in two different test couples and in a two-couple device. In all cases, good agreement was obtained between the measurements and prior analytical predictions. Cooling performance was measured in a test with one QW TE element and good agreement was obtained between measurements and analytical predictions. TE properties of the Si/SiGe QW material used in the analysis and design of the subject TE nano cooler were recently independently verified at University of California San Diego (UCSD) and the U.S. National Institute of Standards and Technology (NIST). This paper deals with the analysis of a high COP QW TE single-stage nano cooler for room temperature detectors and with the improved TE properties obtained with the QW thin-film materials resulting in such high COP designs.
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Mecit, Ahmet Murat, i Fletcher Miller. "Optical Analysis of a Window for Solar Receivers Using the Monte Carlo Ray Trace Method". W ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18186.
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Concentrated solar power (CSP) systems use heliostats to concentrate solar radiation in order to produce heat, which drives a turbine to generate electricity. We, the Combustion and Solar Energy Laboratory at San Diego State University, are developing a new type of receiver for power tower CSP plants based on volumetric absorption by a gas-particle suspension. The radiation enters the pressurized receiver through a window, which must sustain the thermal loads from the concentrated solar flux and infrared reradiation from inside the receiver. The window is curved in a dome shape to withstand the pressure within the receiver and help minimize the stresses caused by thermal loading. It is highly important to estimate how much radiation goes through the window into the receiver and the spatial and directional distribution of the radiation. These factors play an important role in the efficiency of the receiver as well as window survivability. Concentrated solar flux was calculated with a computer code called MIRVAL from Sandia National Laboratory which uses the Monte Carlo Ray Trace (MCRT) method. The computer code is capable of taking the day of the year and time of day into account, which causes a variation in the flux. Knowing the concentrated solar flux, it is possible to calculate the solar radiation through the window and the thermal loading on the window from the short wavelength solar radiation. The MIRVAL code as originally written did not account for spectral variations, but we have added that capability. Optical properties of the window such as the transmissivity, absorptivity, and reflectivity need to be known in order to trace the rays at the window. A separate computer code was developed to calculate the optical properties depending on the incident angle and the wavelength of the incident radiation by using data for the absorptive index and index of refraction for the window (quartz) from other studies and vendor information. This method accounts for regions where the window is partially transparent and internal absorption can occur. A third code was developed using the MCRT method and coupled with both codes mentioned above to calculate the thermal load on the window and the solar radiation that enters the receiver. Thermal load was calculated from energy absorbed at various points throughout the window. In our study, window shapes from flat to concave hemispherical, as well as a novel concave ellipsoidal window are considered, including the effect of day of the year and time of the day.