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  • 2005-2009  (533)
  • 1990-1994  (318)
  • 1940-1944  (4)
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  • 1
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    Interdimensional universality of dynamic interfaces (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-04-11
    Description: Despite the complexity and diversity of nature, there exists universality in the form of critical scaling laws among various dissimilar systems and processes such as stock markets, earthquakes, crackling noise, lung inflation and vortices in superconductors. This universality is mainly independent of the microscopic details, depending only on the symmetry and dimension of the system. Exploring how universality is affected by the system dimensions is an important unresolved problem. Here we demonstrate experimentally that universality persists even at a dimensionality crossover in ferromagnetic nanowires. As the wire width decreases, the magnetic domain wall dynamics changes from elastic creep in two dimensions to a particle-like stochastic behaviour in one dimension. Applying finite-size scaling, we find that all our experimental data in one and two dimensions (including the crossover regime) collapse onto a single curve, signalling universality at the criticality transition. The crossover to the one-dimensional regime occurs at a few hundred nanometres, corresponding to the integration scale for modern nanodevices.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Kab-Jin -- Lee, Jae-Chul -- Ahn, Sung-Min -- Lee, Kang-Soo -- Lee, Chang-Won -- Cho, Young Jin -- Seo, Sunae -- Shin, Kyung-Ho -- Choe, Sug-Bong -- Lee, Hyun-Woo -- England -- Nature. 2009 Apr 9;458(7239):740-2. doi: 10.1038/nature07874.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Subwavelength Optics and School of Physics and Astronomy, Seoul National University, Seoul 151-742, Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19360082" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Enrichment by supernovae in globular clusters with multiple populations (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-11-27
    Description: The most massive globular cluster in the Milky Way, omega Centauri, is thought to be the remaining core of a disrupted dwarf galaxy, as expected within the model of hierarchical merging. It contains several stellar populations having different heavy elemental abundances supplied by supernovae-a process known as metal enrichment. Although M 22 appears to be similar to omega Cen, other peculiar globular clusters do not. Therefore omega Cen and M 22 are viewed as exceptional, and the presence of chemical inhomogeneities in other clusters is seen as 'pollution' from the intermediate-mass asymptotic-giant-branch stars expected in normal globular clusters. Here we report Ca abundances for seven globular clusters and compare them to omega Cen. Calcium and other heavy elements can only be supplied through numerous supernovae explosions of massive stars in these stellar systems, but the gravitational potentials of the present-day clusters cannot preserve most of the ejecta from such explosions. We conclude that these globular clusters, like omega Cen, are most probably the relics of more massive primeval dwarf galaxies that merged and disrupted to form the proto-Galaxy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Jae-Woo -- Kang, Young-Woon -- Lee, Jina -- Lee, Young-Wook -- England -- Nature. 2009 Nov 26;462(7272):480-2. doi: 10.1038/nature08565.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Astronomy and Space Science, ARCSEC, Sejong University, Seoul 143-747, Korea. jaewoolee@sejong.ac.kr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19940919" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    "America and the New Economy: How New Competitive Standards Are Radically Changing American Workplaces". By Anthony Patrick Carnevale (Book Review) (1993)
    Ithaca, N.Y. : Periodicals Archive Online (PAO)
    Industrial and Labor Relations Review. 46:2 (1993:Jan.) 421 
    Details
    ISSN: 0019-7939
    Topics: Economics
    Description / Table of Contents: Human Resources, Personnel, and Organizational Behavior
    Notes: BOOK REVIEWS
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3121-1993-046-02-000026
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  • 4
    Electronic Resource
    Electronic Resource
    THE HEME PIGMENTS OF CURED MEATS (1940)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 5 (1940), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1940.tb17221.x
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  • 5
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    The Status and Prospects of the Economics Major (1991)
    Washington, D.C., etc. : Periodicals Archive Online (PAO)
    The Journal of economic education. 22:3 (1991:Summer) 197 
    Details
    ISSN: 0022-0485
    Topics: Economics
    Notes: PROFESSIONAL INFORMATION
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p335-1991-022-03-000002
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  • 6
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    Teaching a Writing Intensive Course in Economics (1993)
    Washington, D.C., etc. : Periodicals Archive Online (PAO)
    The Journal of economic education. 24:3 (1993:Summer) 213 
    Details
    ISSN: 0022-0485
    Topics: Economics
    Notes: ECONOMIC INSTRUCTION
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p335-1993-024-03-000002
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  • 7
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    Exploring the Effects of Ability to Pay on Persistence in College (1990)
    Charlottesville, Va. : Periodicals Archive Online (PAO)
    The Review of Higher Education. 13:3 (1990:Spring) 303 
    Details
    ISSN: 0162-5748
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:v050-1990-013-03-000004
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  • 8
    Electronic Resource
    Electronic Resource
    Patterns of parental reaction to student grades (1991)
    Springer
    Higher education 22 (1991), S. 31-42 
    Details
    ISSN: 1573-174X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract Factor analysis of questionnaire responses produced by over 6,000 individuals revealed parental reactions to good and bad grades grouped themselves into five categories: (1) Grades are important to me; bad ones lead to negative consequences; (2) Good grades are important to me, but I will support you regardless of grade; (3) Bad grades make me mad; (4) Do your best, but there is more to life than grades; and (5) Grades are important; you will know how I feel on the basis of a joking comment. When these patterns were related to reports of specific student actions in college, such as getting good grades, dropping a course, or cheating on an examination, results indicated only a few significant negative correlations, and only for students whose parents reacted to bad grades in a negative emotional way; i.e., in terms of categories 1 and 3. More benign reactions - categories 2, 4, and 5 - did not correlate either positively or negatively with student actions or grades. Results were taken to suggest that parental reactions to grades are not only attempts at changing student behavior but also may be viewed as emotional responses expressing personal needs and values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02351198
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  • 9
    Electronic Resource
    Electronic Resource
    Bringing Total Quality Improvement into the college classroom (1993)
    Springer
    Higher education 25 (1993), S. 259-279 
    Details
    ISSN: 1573-174X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract This paper describes a recent effort to infuse the Total Quality Improvement (TQI) approach, popularized by Deming and others, into an upper-division, junior-senior economics course at the University of Wisconsin-Madison. The process of infusing TQI into instruction has received relatively little attention. Most efforts to bring TQI into higher education focus on improving administrative operations and establishing courses and programs for students to learn how to apply TQI in their future jobs. The challenge is in using TQI to help students realize their potential for learning in traditional courses. The TQI instruction approach developed for use in the course had three major elements. Customer Focus is represented by the proficiencies emphasized in the course and expected of graduating economics majors. Student Involvement is represented by team-centered research projects whose purpose is to enhance the proficiency of creating new knowledge. Continuous Improvement is represented by ongoing student evaluations of the course and instructor, carried out by a student team. After discussing the motivation for adopting this approach and the independent development of the concept of proficiencies in the economics major, the paper moves on to discuss the planning, implementation, and execution of the course. Particular attention is given to discussing the operation of the teams and the development of a multi-faceted ongoing evaluation process to assess the effectiveness of the TQI Instructional Approach. The evaluation results indicate strong student satisfaction with the TQI orientation of the course, while at the same time pointing out ways of improving what was done.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01383854
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  • 10
    Electronic Resource
    Electronic Resource
    A novel derivatization method for peptides to increase sensitivity and backbone fragmentation in liquid secondary-ion mass spectra (1992)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 6 (1992), S. 747-752 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Derivatization is used to increase both negative-ion sensitivity and positive-ion sequence information in the liquid secondary-ion mass spectra (LSIMS) of a series of peptides. The derivatization method involves acylation with pentafluorobenzyl fluoride in a single-step reaction, and the reaction mixture is applied directly to the probe tip for analysis. Acylation takes place at the unprotexted N-terminus, tyrosine, and lysine. The derivatives exhibit increased signal-to-noise ration for [M—H]- ions, especially where there is not already an acidic amino acid residue in the peptide. In positive-ion LSIMS, the N-terminal group acts to retain the charge at the N-terminus, simplifying the fragmentation by producing N-terminal fragment ions. It also increases positive-ion fragmentation, sometimes very dramatically, making sequence determination more straightforward. The simplicity of the process, together with the enhancements it provides, make3 this a generally useful method for obtaining peptide structural information.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290061207
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