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1تقرير
المؤلفون: Fong, H. F., Bourges, P., Sidis, Y., Regnault, L. P., Bossy, J., Ivanov, A., Milius, D. L., Aksay, I. A., Keimer, B.
المصدر: Phys. Rev. B 61, 14773 (2000)
مصطلحات موضوعية: Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
الوصف: We report a comprehensive polarized and unpolarized neutron scattering study of the evolution of the dynamical spin susceptibility with temperature and doping in three underdoped single crystals of the \YBCO{6+x} high temperature superconductor: \YBCO{6.5} (Tc = 52 K), \YBCO{6.7} (Tc = 67 K), and \YBCO{6.85} (T_c = 87 K). Theoretical implications of these data are discussed, and a critique of recent attempts to relate the spin excitations to the thermodynamics of high temperature superconductors is given.
Comment: minor revisions, to appear in PRBالوصول الحر: http://arxiv.org/abs/cond-mat/9910041Test
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2تقرير
المؤلفون: Bourges, Ph., Sidis, Y., Fong, H. F., Keimer, B., Regnault, L. P., Bossy, J., Ivanov, A. S., Milius, D. L., Aksay, I. A.
المصدر: High Temperature Superconductivity Edited by S.E. Barnes {\it et al} 207-212 (CP483 American Institute of Physics, Amsterdam, 1999) .
مصطلحات موضوعية: Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
الوصف: Key features of antiferromagnetic dynamical correlations in high-$T_C$ superconductors cuprates are discussed. In underdoped regime, the sharp resonance peak, occuring exclusively in the SC state, is accompanied by a broader contribution located around $\sim$ 30 meV which remains above $T_C$. Their interplay may induce incommensurate structure in the superconducting state.
Comment: HTS99 Proceedings Miami (January 7-11 1999)الوصول الحر: http://arxiv.org/abs/cond-mat/9902067Test
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3تقرير
المؤلفون: Fong, H. F., Bourges, P., Sidis, Y., Regnault, L. P., Bossy, J., Ivanov, A., Milius, D. L., Aksay, I. A., Keimer, B.
المصدر: Phys. Rev. Lett. 82, 1939 (1999)
مصطلحات موضوعية: Condensed Matter - Superconductivity
الوصف: The magnetic excitation spectrum of a YBa_2 Cu_3 O_7 crystal containing 0.5% of nonmagnetic (Zn) impurities has been determined by inelastic neutron scattering. Whereas in the pure system a sharp resonance peak at E ~ 40 meV is observed exclusively below the superconducting transition temperature T_c, the magnetic response in the Zn-substituted system is broadened significantly and vanishes at a temperature much higher than T_c. The energy-integrated spectral weight observed near q = (pi,pi) increases with Zn substitution, and only about half of the spectral weight is removed at T_c.
الوصول الحر: http://arxiv.org/abs/cond-mat/9812047Test
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4تقرير
المؤلفون: Keimer, B., Fong, H. F., Lee, S. H., Milius, D. L., Aksay, I. A.
مصطلحات موضوعية: Condensed Matter
الوصف: We report inelastic neutron scattering experiments on the doping dependence of the energy and spectral weight of the sharp magnetic resonance peak in YBa_2 Cu_3 O_{6+x}. These measurements also shed light on the relationship between the magnetic excitations in the normal and superconducting states.
Comment: (mostly corrections to figures and minor change to caption in Fig.5) 5 figures. It will be published in the proceedings of M2S-HTSC-V. It needs the elsevier style file (not included) to convert to postscriptالوصول الحر: http://arxiv.org/abs/cond-mat/9705103Test
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5تقرير
المؤلفون: Bourges, Ph., Fong, H. F., Regnault, L. P., Bossy, J., Vettier, C., Milius, D. L., Aksay, I. A., Keimer, B.
المصدر: Phys. Rev. B, 56, R11439 (1997)
مصطلحات موضوعية: Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
الوصف: Inelastic neutron scattering has been used to obtain a comprehensive description of the absolute dynamical spin susceptibility $\chi'' (q,\omega)$ of the underdoped superconducting cuprate YBa_2 Cu_3 O_{6.5} ($T_c = 52 K$) over a wide range of energies and temperatures ($2 meV \leq \hbar \omega \leq 120 meV$ and $5K \leq T \leq 200K$). Spin excitations of two different symmetries (even and odd under exchange of two adjacent CuO_2 layers) are observed which, surprisingly, are characterized by different temperature dependences. The excitations show dispersive behavior at high energies.
Comment: 15 pages, 5 figuresالوصول الحر: http://arxiv.org/abs/cond-mat/9704073Test
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6تقرير
المؤلفون: Fong, H. F., Keimer, B., Milius, D. L., Aksay, I. A.
مصطلحات موضوعية: Condensed Matter - Superconductivity
الوصف: Polarized and unpolarized neutron scattering has been used to determine the effect of superconductivity on the magnetic excitation spectra of YBa_2 Cu_3 O_{6.5} (T_c = 52K) and YBa_2 Cu_3 O_{6.7} (T_c = 67K). Pronounced enhancements of the spectral weight centered around 25 meV and 33 meV, respectively, are observed below T_c in both crystals, compensated predominantly by a loss of spectral weight at higher energies. The data provide important clues to the origin of the 40 meV magnetic resonance peak in YBa_2 Cu_3 O_7.
Comment: LaTex, 4 pages, 4 ps figures. to appear in Phys. Rev. Lettالوصول الحر: http://arxiv.org/abs/cond-mat/9612110Test
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7دورية أكاديمية
المؤلفون: Milius, D, Dove, ES, Donald Chalmers, Dyke, SOM, Kato, K, Nicolas, P, Ouellette, BFF, Ozenberger, B, Rodiguez, LL, Zeps, N, Joly, Y
مصطلحات موضوعية: International humanitarian and human rights law, No keyword provided
الوصف: there is no abstract available.
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8دورية أكاديمية
المؤلفون: Milius, D., Dove, E., Chalmers, D., Dyke, S., Kato, K., Nicolás, P., Ouellette, B., Ozenberger, B., Rodriguez, L., Zeps, Nikolajs, Joly, Y.
الوصف: The International Cancer Genome Consortium (ICGC) is an international initiative launched in 2008 to coordinate large-scale cancer genome studies from 50 different cancer types and subtypes of global clinical and societal importance. As of May 2014, 74 project teams in 17 countries in Asia, Australia, Europe and North America are analyzing more than 25,000 tumor genomes ( http://www.icgc.orgTest/ ). In addition to its goal of generating comprehensive catalogs of genomic abnormalities to facilitate better understanding, treatment and prevention of cancer, ICGC is committed to making the data it generates available to the international research community as rapidly as possible, with minimal restrictions on appropriate data use. Here, we describe the experience of ICGC in addressing privacy and confidentiality issues raised by recent articles that expose re-identification threats for research participants.
وصف الملف: restricted
الإتاحة: https://doi.org/20.500.11937/44404Test
https://doi.org/10.1038/nbt.2926Test
https://hdl.handle.net/20.500.11937/44404Test -
9دورية أكاديمية
المؤلفون: Ozdemir V, Borda-Rodriguez A, Dove ES, Ferguson LR, Huzair F, Manolopoulos VG, Masellis M, Milius D, Warnich L, Srivastava S
الوصف: Please help populate SUNScholar with the full text of SU research output. Also - should you need this item urgently, please snd us the details and we will try to get hold of the full text as quick possible. E-mail to scholar@sun.ac.za. Thank you. ; Agriwetenskappe ; Genetika
العلاقة: Current Pharmacogenomics and Personalized Medicine; 11; http://hdl.handle.net/10019.1/87012Test
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10دورية أكاديمية
المؤلفون: OZDEMIR, V, BADR, KF, DOVE, ES, ENDRENYI, L, GERACI, CJ, HOTEZ, PJ, MILIUS, D, NEVES-PEREIRA, M, PANG, T, ROTIMI, CN, SABRA, R, SARKISSIAN, CN, SRIVASTAVA, S, TIMS, H, ZGHEIB, NK, KICKBUSCH, I
مصطلحات موضوعية: Neglected Tropical Diseases, American Diplomacy, Civilian Power, Public-Health, Global Health, Need, Discovery, Medicine, Society
الوقت: 21st-Century
الوصف: Biomedical science in the 21st century is embedded in, and draws from, a digital commons and "Big Data" created by high-throughput Omics technologies such as genomics. Classic Edisonian metaphors of science and scientists (i.e., "the lone genius" or other narrow definitions of expertise) are ill equipped to harness the vast promises of the 21st century digital commons. Moreover, in medicine and life sciences, experts often under-appreciate the important contributions made by citizen scholars and lead users of innovations to design innovative products and co-create new knowledge. We believe there are a large number of users waiting to be mobilized so as to engage with Big Data as citizen scientists-only if some funding were available. Yet many of these scholars may not meet the meta-criteria used to judge expertise, such as a track record in obtaining large research grants or a traditional academic curriculum vitae. This innovation research article describes a novel idea and action framework: micro-grants, each worth $1000, for genomics and Big Data. Though a relatively small amount at first glance, this far exceeds the annual income of the "bottom one billion"-the 1.4 billion people living below the extreme poverty level defined by the World Bank ($1.25/day). We describe two types of micro-grants. Type 1 micro-grants can be awarded through established funding agencies and philanthropies that create micro-granting programs to fund a broad and highly diverse array of small artisan labs and citizen scholars to connect genomics and Big Data with new models of discovery such as open user innovation. Type 2 micro-grants can be funded by existing or new science observatories and citizen think tanks through crowd-funding mechanisms described herein. Type 2 micro-grants would also facilitate global health diplomacy by co-creating crowd-funded micro-granting programs across nation-states in regions facing political and financial instability, while sharing similar disease burdens, therapeutics, and diagnostic needs. We ...
