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Search Results: 1 - 10 of 30975 matches for " QIAO Yim-YI "
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PHOTOLUMINESCENCE AND RAMAN SCATTERING SPECTROSCOPIES OF MBE-GROWN Hg0.68Cd0.32Te EPILAYER
分子束外延Hg0.68Cd0.32Te薄膜光致发光和喇曼散射的研究

JI Rong-Bin,WANG Shan-Li,YANG Jian-rong,YU Mei-Fang,QIAO Yim-YI,CHANG Yong,LI Ba-Ao,HE Li,
姬荣斌
,王善力

红外与毫米波学报 , 1998,
Abstract: Using photoluminescence (PL) and Raman scattering (RS), the MBE grown Hg 1- x Cd x Te ( x =0.325) epilayers were studied. The PL measurement shows a strong near band emission peak with a FWHM of 5meV, which indicates high crystal quality obtained. Three peaks, the relatively strong HgTe like TO mode at 119cm -1 and HgTe like LO at 139cm -1 and a weak LA mode at 93cm -1 , were observed on RS spectra. The weak peak at 93cm -1 has not been reported previously. The assignment of the peak is based on the comparison with the result of far infrared transmittance spectra(FIT).
Significance of Input Correlations in Striatal Function
Man Yi Yim ,Ad Aertsen,Arvind Kumar
PLOS Computational Biology , 2011, DOI: 10.1371/journal.pcbi.1002254
Abstract: The striatum is the main input station of the basal ganglia and is strongly associated with motor and cognitive functions. Anatomical evidence suggests that individual striatal neurons are unlikely to share their inputs from the cortex. Using a biologically realistic large-scale network model of striatum and cortico-striatal projections, we provide a functional interpretation of the special anatomical structure of these projections. Specifically, we show that weak pairwise correlation within the pool of inputs to individual striatal neurons enhances the saliency of signal representation in the striatum. By contrast, correlations among the input pools of different striatal neurons render the signal representation less distinct from background activity. We suggest that for the network architecture of the striatum, there is a preferred cortico-striatal input configuration for optimal signal representation. It is further enhanced by the low-rate asynchronous background activity in striatum, supported by the balance between feedforward and feedback inhibitions in the striatal network. Thus, an appropriate combination of rates and correlations in the striatal input sets the stage for action selection presumably implemented in the basal ganglia.
Impact of intrinsic biophysical diversity on the activity of spiking neurons
Man Yi Yim,Ad Aertsen,Stefan Rotter
Quantitative Biology , 2012, DOI: 10.1103/PhysRevE.87.032710
Abstract: We study the effect of intrinsic heterogeneity on the activity of a population of leaky integrate-and-fire neurons. By rescaling the dynamical equation, we derive mathematical relations between multiple neuronal parameters and a fluctuating input noise. To this end, common input to heterogeneous neurons is conceived as an identical noise with neuron-specific mean and variance. As a consequence, the neuronal output rates can differ considerably, and their relative spike timing becomes desynchronized. This theory can quantitatively explain some recent experimental findings.
Homological Properties of Determinantal Arrangements
Arnold Yim
Mathematics , 2015,
Abstract: We explore a natural extension of braid arrangements in the context of determinantal arrangements. We show that these determinantal arrangements are free divisors. Additionally, we prove that free determinantal arrangements defined by the minors of $2\times n$ matrices satisfy nice combinatorial properties. We also study the topology of the complements of these determinantal arrangements, and prove that their higher homotopy groups are isomorphic to those of $S^3$. Furthermore, we find that the complements of arrangements satisfying those same combinatorial properties above have Poincar\'e polynomials that factor nicely.
Moderators of occupational pressure in female health professionals—Individual differences and coping skills  [PDF]
Siew Yim Loh, Kia Fatt Quek
Health (Health) , 2013, DOI: 10.4236/health.2013.510224
Abstract:

Individual differences and coping skills have influential impacts on stress process by influencing the eventual outcomes of the stressors, contributing to either wellbeing, or illness and negative experiences. The aim of this paper is to explore the individual differences and coping strategies of a cohort of women with health professionals’ occupational pressure. This is a cross-sectional survey, informed by the transactional model of stress and coping framework, and carried out on women health professionals (n = 203) from the Kuala Lumpur Hospital. Multiple regressions were conducted to examine the potential moderators of stress. Women Health Professionals reported stress with six out of eight organizational sources of pressure, with relationship being a key stressor. Their individual differences (mean + SD) were characterised by low drive (7.6 + 1.9-8.2 + 2.0), low personal influence (10.8 + 2.0 to 11.7 + 2.3), moderate control (13.4 + 3.4 to 16.3 + 2.4), and high impatience behaviour (19.1 + 3.8 to 20.4 + 3.3). With Coping strategy, the Life-work-balance coping is a significant positive predictor for five out of the nine outcomes of occupational pressure [state of mind (p < 0.001), level of resilience (p = 0.01), level of confidence (p = 0.003), physical symptoms (p = 0.001) and energy level (p < 0.001)]. The findings show relationship as a key stressor, with a less favourable pattern of individual-differences and an over-reliance on lifework balance coping. Female health professionals, stressed at work, have an undesirable profile of individual difference and a coping strategies, suggestive of attempts to balance the demands of their dual work role. The increasing female into the workforce, warrants more research to inform stress management guideline to ameliorate stress amongst those vulnerable workers. Future studies to examine individual differences of these female-dominated professions across health setting are needed to better inform the pressure-at-work issues for the increasing Asian women health professionals.

Soft X-Ray Irradiation Effects of Li2O2, Li2CO3 and Li2O Revealed by Absorption Spectroscopy
Ruimin Qiao,Yi-De Chuang,Shishen Yan,Wanli Yang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0049182
Abstract: Li2O2, Li2CO3, and Li2O are three critical compounds in lithium-air and lithium-ion energy storage systems. Extensive measurements have been carried out to study the chemical species and their evolutions at difference stages of the device operation. While x-ray spectroscopy has been demonstrated to be one of the most powerful tools for such purpose, no systematic study on the irradiation effects have been reported. Here we carry out extensive time, position, and irradiation dependent Li K-edge soft x-ray absorption spectroscopy on these compounds with so far the best energy resolution. The ultra-high resolution in the current study allows the features in the absorption spectra to be well-resolved. The spectral lineshape thus serves as the fingerprints of these compounds, enabling the tracking of their evolution under x-ray irradiation. We found that both Li2O2 and Li2CO3 evidently evolve towards Li2O under the soft x-ray irradiation with Li2CO3 exhibiting a surprisingly higher sensitivity to x-rays than Li2O2. On the other hand, Li2O remains the most stable compound despite experiencing substantial irradiation dose. We thus conclude that high resolution soft x-ray spectroscopy could unambiguously fingerprint different chemical species, but special cautions on irradiation effects would be needed in performing the experiments and interpreting the data properly.
Stress corrosion cracking and its anisotropy of a PZT ferroelectric ceramics
Yi Wang,Wuyang Chu,Yanjing Su,Kewei Gao,Lijie Qiao
Chinese Science Bulletin , 2003, DOI: 10.1007/BF03183937
Abstract: Stress corrosion cracking (SCC) of a PZT ferroelectric ceramics in various media, such as moist atmosphere, silicon oil, methanol, water and formamide, and its anisotropy have been investigated at constant load test using a single-edge notched tensile specimen. The results showed that SCC could occur in all media, and the threshold stress intensity factor of SCC in water and formamide, KISCC, revealed anisotropy. The KISCC for poling direction parallel to the crack plane, KISCC a was greater than that perpendicular to the crack plane, KISCC b similar to the anisotropy of fracture toughness KIC; however, the anisotropy factor of KISCC, which was KISCC a/KISCC b =1.8 (in formamide) and 2.1 (in water), was larger than that of KIC which is K IC a /K IC b =1.4. The stress-induced 90° domain switching causes the anisotropy of KIC and KIC, besides, the resistance of SCC also has anisotropy.
Study of Anterior Chamber Configuration with Panoramic Ultrasound Biomicroscopy in Chronic Angle-Closure Glaucoma and Co-Existing Age-Related Cataract after Phacoemulsification
Yan Zhu,Cai-Xuan Huang,Yi-Qiao Xing
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.4494.4496
Abstract: To study the changes in anterior chamber configuration by panoramic ultrasound biomicroscopy. Phacoemulsification and IOL implantation were performed in 40 eyes in 40 cases with co-existing CACG and cataract and 40 eyes of 40 controls with age-related cataract. The anterior chamber diameter and Anterior Chamber Depth (ACD) were measured with panoramic ultrasound biomicroscopy before and 2 months after the surgery. The anterior chamber diameter in patients with CACG and co-existing cataract was 9.93±0.39 mm before surgery and 11.45±0.53 mm after surgery. The corresponding values found in controls were 11.47±0.62 mm and 11.93±0.39 mm. In both groups, the anterior chamber diameter was widened significantly 2 months after surgery and the ACD was deepened. Anterior chamber diameter in patients with CACG and co-existing cataract is less than that in patients with age-related cataract. After phacoemulsification and IOL implantation, the anterior chamber diameter is increased.
Bell Inequalities in High Energy Physics
Ding, Yi-Bing;Li, Junli;Qiao, Cong-Feng
High Energy Physics - Phenomenology , 2007,
Abstract: We review in this paper the research status on testing the completeness of Quantum mechanics in High Energy Physics, especially on the Bell Inequalities. We briefly introduce the basic idea of Einstein, Podolsky, and Rosen paradox and the results obtained in photon experiments. In the tests of Bell inequalities in high energy physics, the early attempts of using spin correlations in particle decays and later on the mixing of neutral mesons used to form the quasi-spin entangled states are covered. The related experimental results in K^0 and B^0 systems are presented and discussed. We introduce the new scheme, which is based on the non-maximally entangled state and proposed to implement in \phi factory, in testing the Local Hidden Variable Theory. And, we also discuss the possibility in generalizing it to the tau charm factory.
Bell Inequalities in High Energy Physics
Yi-Bing Ding,Junli Li,Cong-Feng Qiao
Physics , 2007,
Abstract: We review in this paper the research status on testing the completeness of Quantum mechanics in High Energy Physics, especially on the Bell Inequalities. We briefly introduce the basic idea of Einstein, Podolsky, and Rosen paradox and the results obtained in photon experiments. In the tests of Bell inequalities in high energy physics, the early attempts of using spin correlations in particle decays and later on the mixing of neutral mesons used to form the quasi-spin entangled states are covered. The related experimental results in K^0 and B^0 systems are presented and discussed. We introduce the new scheme, which is based on the non-maximally entangled state and proposed to implement in \phi factory, in testing the Local Hidden Variable Theory. And, we also discuss the possibility in generalizing it to the tau charm factory.
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