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Search Results: 1 - 10 of 472440 matches for "   John K. C. Wang "
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Selection of Periodical: A Cognitive Statistical Approach
  John K. C. Wang
Journal of Library and Information Science , 1980,
Abstract: 頁次:17-24
Industrial Research Libraries: How can They put Information to Work in the 1980's?
  John K. C. Wang
Journal of Library and Information Science , 1981,
Abstract: 頁次:194-203
青少年体育活动中的目标定向和自我决定理论:年龄和性别的差异
孙延林?,C. K. John Wang,St uar t J. H. Biddle?
天津体育学院学报 , 2001,
Abstract: 以英格兰824名初中生为调查对象,主要考察了在目标定向、行为调节、能力知觉和体育活动参与情况上的年龄和性别差异,并且采用动机变量预测校外体育活动参与情况。研究结果呈现出明显的性别差异,男生有较高的自我定向、自我决定动机和能力知觉。与此一致的结果是男生比女生更喜爱体育活动。对男生来说,自我定向、自我决定动机和能力知觉是参加体育活动的正相关预测指标,而任务定向和无动机与体育活动参与没有关系。对女生来说,任务定向和能力知觉能够积极预测体育活动参与情况,而自我定向和无动机与体育活动的参与有负相关关系。
初中女生的运动能力信念和调节方式:与愉快、努力和厌烦的关系(英文)
C.K.John Wang,W.C.Liu?,孙延林?,Biddle S.J.H.?
天津体育学院学报 , 2003,
Abstract: 女生参予体育活动已经成为众所关注的问题。考察了运动能力信念、能力知觉和调节方式的关系,并且依据运动能力信念和调节方式的不同,按照愉快、努力和厌烦的水平,确定了三个不同的初中女生的动机模式。为在促进初中女生参加体育活动中考虑运动能力信念和自我决定理论提供了依据。
Engineered 2D Ising interactions on a trapped-ion quantum simulator with hundreds of spins
Joseph W. Britton,Brian C. Sawyer,Adam C. Keith,C. -C. Joseph Wang,James K. Freericks,Hermann Uys,Michael J. Biercuk,John. J. Bollinger
Physics , 2012, DOI: 10.1038/nature10981
Abstract: The presence of long-range quantum spin correlations underlies a variety of physical phenomena in condensed matter systems, potentially including high-temperature superconductivity. However, many properties of exotic strongly correlated spin systems (e.g., spin liquids) have proved difficult to study, in part because calculations involving N-body entanglement become intractable for as few as N~30 particles. Feynman divined that a quantum simulator - a special-purpose "analog" processor built using quantum particles (qubits) - would be inherently adept at such problems. In the context of quantum magnetism, a number of experiments have demonstrated the feasibility of this approach. However, simulations of quantum magnetism allowing controlled, tunable interactions between spins localized on 2D and 3D lattices of more than a few 10's of qubits have yet to be demonstrated, owing in part to the technical challenge of realizing large-scale qubit arrays. Here we demonstrate a variable-range Ising-type spin-spin interaction J_ij on a naturally occurring 2D triangular crystal lattice of hundreds of spin-1/2 particles (9Be+ ions stored in a Penning trap), a computationally relevant scale more than an order of magnitude larger than existing experiments. We show that a spin-dependent optical dipole force can produce an antiferromagnetic interaction J_ij ~ 1/d_ij^a, where a is tunable over 0
Spectroscopy and Thermometry of Drumhead Modes in a Mesoscopic Trapped-Ion Crystal using Entanglement
Brian C. Sawyer,Joseph W. Britton,Adam C. Keith,C. -C. Joseph Wang,James K. Freericks,Hermann Uys,Michael J. Biercuk,John J. Bollinger
Physics , 2012, DOI: 10.1103/PhysRevLett.108.213003
Abstract: We demonstrate spectroscopy and thermometry of individual motional modes in a mesoscopic 2D ion array using entanglement-induced decoherence as a method of transduction. Our system is a $\sim$400 $\mu$m-diameter planar crystal of several hundred $^9$Be$^+$ ions exhibiting complex drumhead modes in the confining potential of a Penning trap. Exploiting precise control over the $^9$Be$^+$ valence electron spins, we apply a homogeneous spin-dependent optical dipole force to excite arbitrary transverse modes with an effective wavelength approaching the interparticle spacing ($\sim$20 \nolinebreak$\mu$m). Center-of-mass displacements below 1 nm are detected via entanglement of spin and motional degrees of freedom.
A Study of Trait Anhedonia in Non-Clinical Chinese Samples: Evidence from the Chapman Scales for Physical and Social Anhedonia
Raymond C. K. Chan, Yi Wang, Chao Yan, Qing Zhao, John McGrath, Xiaolu Hsi, William S. Stone
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0034275
Abstract: Background Recent studies suggest that anhedonia, an inability to experience pleasure, can be measured as an enduring trait in non-clinical samples. In order to examine trait anhedonia in a non-clinical sample, we examined the properties of a range of widely used questionnaires capturing anhedonia. Methods 887 young adults were recruited from colleges. All of them were administered a set of checklists, including Chapman Scale for Social Anhedonia (CRSAS) and the Chapman Scale for Physical Anhedonia Scale (CPAS), The Temporal Experience of Pleasure Scale(TEPS), and The Schizotypal Personality Questionnaire (SPQ). Results Males showed significantly higher level of physical (F = 5.09, p<0.001) and social (F = 4.38, p<0.005) anhedonia than females. As expected, individuals with schizotypal personality features also demonstrated significantly higher scores of physical (t = 3.81, p<0.001) and social (t = 7.33, p<0.001) trait anhedonia than individuals without SPD features, but no difference on self-report anticipatory and consummatory pleasure experience. Conclusions Concerning the comparison on each item of physical and social anhedonia, the results indicated that individuals with SPD feature exhibited higher than individuals without SPD features on more items of social anhedonia than physical anhedonia scale. These preliminary findings suggested that trait anhedonia can be identified a non-clinical sample. Exploring the demographic and clinical correlates of trait anhedonia in the general population may provide clues to the pathogenesis of psychotic disorder.
Pulmonary Fissure Integrity and Collateral Ventilation in COPD Patients
Jiantao Pu, Zhimin Wang, Suicheng Gu, Carl Fuhrman, Joseph K. Leader, Xin Meng, John Tedrow, Frank C. Sciurba
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0096631
Abstract: Purpose To investigate whether the integrity (completeness) of pulmonary fissures affects pulmonary function in patients with chronic obstructive pulmonary disease (COPD). Materials and Methods A dataset consisting of 573 CT exams acquired on different subjects was collected from a COPD study. According to the global initiative for chronic obstructive lung disease (GOLD) criteria, these subjects (examinations) were classified into five different subgroups, namely non-COPD (222 subjects), GOLD-I (83 subjects), GOLD-II (141 subjects), GOLD-III (63 subjects), and GOLD-IV (64 subjects), in terms of disease severity. An available computer tool was used to aid in an objective and efficient quantification of fissure integrity. The correlations between fissure integrity, and pulmonary functions (e.g., FEV1, and FEV1/FVC) and COPD severity were assessed using Pearson and Spearman's correlation coefficients, respectively. Results For the five sub-groups ranging from non-COPD to GOLD-IV, the average integrities of the right oblique fissure (ROF) were 81.8%, 82.4%, 81.8%, 82.8%, and 80.2%, respectively; the average integrities of the right horizontal fissure (RHF) were 62.6%, 61.8%, 62.1%, 62.2%, and 62.3%, respectively; the average integrities of the left oblique fissure (LOF) were 82.0%, 83.2%, 81.7%, 82.0%, and 78.4%, respectively; and the average integrities of all fissures in the entire lung were 78.0%, 78.6%, 78.1%, 78.5%, and 76.4%, respectively. Their Pearson correlation coefficients with FEV1 and FE1/FVC range from 0.027 to 0.248 with p values larger than 0.05. Their Spearman correlation coefficients with COPD severity except GOLD-IV range from ?0.013 to ?0.073 with p values larger than 0.08. Conclusion There is no significant difference in fissure integrity for patients with different levels of disease severity, suggesting that the development of COPD does not change the completeness of pulmonary fissures and incomplete fissures alone may not contribute to the collateral ventilation.
Chronic Inhibition, Self-Control and Eating Behavior: Test of a ‘Resource Depletion’ Model
Martin S. Hagger, Giulia Panetta, Chung-Ming Leung, Ging Ging Wong, John C. K. Wang, Derwin K. C. Chan, David A. Keatley, Nikos L. D. Chatzisarantis
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0076888
Abstract: The current research tested the hypothesis that individuals engaged in long-term efforts to limit food intake (e.g., individuals with high eating restraint) would have reduced capacity to regulate eating when self-control resources are limited. In the current research, body mass index (BMI) was used as a proxy for eating restraint based on the assumption that individuals with high BMI would have elevated levels of chronic eating restraint. A preliminary study (Study 1) aimed to provide evidence for the assumed relationship between eating restraint and BMI. Participants (N = 72) categorized into high or normal-range BMI groups completed the eating restraint scale. Consistent with the hypothesis, results revealed significantly higher scores on the weight fluctuation and concern for dieting subscales of the restraint scale among participants in the high BMI group compared to the normal-range BMI group. The main study (Study 2) aimed to test the hypothesized interactive effect of BMI and diminished self-control resources on eating behavior. Participants (N = 83) classified as having high or normal-range BMI were randomly allocated to receive a challenging counting task that depleted self-control resources (ego-depletion condition) or a non-depleting control task (no depletion condition). Participants then engaged in a second task in which required tasting and rating tempting cookies and candies. Amount of food consumed during the taste-and-rate task constituted the behavioral dependent measure. Regression analyses revealed a significant interaction effect of these variables on amount of food eaten in the taste-and-rate task. Individuals with high BMI had reduced capacity to regulate eating under conditions of self-control resource depletion as predicted. The interactive effects of BMI and self-control resource depletion on eating behavior were independent of trait self-control. Results extend knowledge of the role of self-control in regulating eating behavior and provide support for a limited-resource model of self-control.
Mechanisms of HIV non-progression; robust and sustained CD4+ T-cell proliferative responses to p24 antigen correlate with control of viraemia and lack of disease progression after long-term transfusion-acquired HIV-1 infection
Wayne B Dyer, John J Zaunders, Fang Yuan, Bin Wang, Jennifer C Learmont, Andrew F Geczy, Nitin K Saksena, Dale A McPhee, Paul R Gorry, John S Sullivan
Retrovirology , 2008, DOI: 10.1186/1742-4690-5-112
Abstract: A survival advantage was conferred on 12 of 13 subjects, who had at least one host genetic factor (HLA, chemokine receptor or TLR polymorphisms) or viral attenuating factor (defective nef) associated with slow progression. However, antiviral immune responses differentiated the course of disease into and beyond the second decade of infection. A stable p24-specific proliferative response was associated with control of viraemia and retention of non-progressor status, but this p24 response was absent or declined in viraemic subjects. Strong Gag-dominant cytotoxic T lymphocyte (CTL) responses were identified in most LTNP, or Pol dominant-CTL in those with nef-defective HIV infection. CTL were associated with control of viraemia when combined with p24 proliferative responses. However, CTL did not prevent late disease progression. Individuals with sustained viral suppression had CTL recognising numerous Gag epitopes, while strong but restricted responses to one or two immunodominant epitopes was effective for some time, but failed to contain viraemia over the course of this study. Viral escape mutants at a HLA B27-restricted Gag-p24 epitope were detected in only 1 of 3 individuals, whereas declining or negative p24 proliferative responses occurred in all 3 concurrent with an increase in viraemia.Detectable viraemia at study entry was predictive of loss of LTNP status and/or disease progression in 6 of 8, and differentiated slow progressors from elite LTNP who retained potent virological control. Sustained immunological suppression of viraemia was independently associated with preserved p24 proliferative responses, regardless of the strength and breadth of the CTL response. A decline in this protective p24 response preceded or correlated with loss of non-progressor status and/or signs of disease progression.A cohort of blood product recipients with transfusion-acquired HIV (TAHIV) infected between 1981 and 1984 was followed prospectively by the Australian Red Cross Blood Se
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