Dynamical precession of spin in the two-dimensional spin-orbit coupled systems
Publication date: Available online 8 May 2019Source: Physics Letters AAuthor(s): Tsung-Wei Chen, Zhi-Yang Huang, Dah-Wei ChiouAbstractWe investigate the spin dynamics in the two-dimensional spin-orbit coupled system subject to an in-plane (x-y plane) constant electric field, which is assumed to be turned on at the moment t=0. The equation of spin precession in linear response to the switch-on of the electric field is derived in terms of Heisenberg's equation by the perturbation method up to the first order of the electric field. The dissipative effect, which is responsible for bringing the dynamical response to an asymptotic result, is phenomenologically implemented à la the Landau-Lifshitz-Gilbert equation by introducing damping terms upon the equation of spin dynamics. Mediated by the dissipative effect, the resulting spin dynamics asymptotes to a stationary state, where the spin and the momentum-dependent effective magnetic field are aligned again and have nonzero components in the out-of-plane (z) direction. In the linear response regime, the asymptotic response obtained by the dynamical treatment is in full agreement with the stationary response as calculated in the Kubo formula, which is a time-independent approach treating the applied electric field as completely time-independent. Our method provides a new perspective on the connection between the dynamical and stationary responses.
CONCLUSIONS: The concept of soldier-centered care often emerges in discussions about optimal physical performance and medical readiness for soldiers. Although soldier-centered care and patient-centered care have similar conceptual underpinning, it is important to clarify the unique physical and medical requirements for soldiers that differentiate soldier-centered care from patient-centered care. Implementing the defining attributes of soldier-centered care in the U.S. Army primary care setting may improve the quality of care and health outcomes for soldiers. When defining performance metrics for primary care models of care...
Authors: Waller SG Abstract Three important but neglected principles of evaluation of global health engagement missions are stakeholder engagement, impact, and relative value. Implementing better M&E programs could be carried out in this fiscal year, without new appropriations or manpower. The result would be cost savings and improved security cooperation. PMID: 31942621 [PubMed - as supplied by publisher]
Publication date: Available online 18 January 2020Source: Clinica Chimica ActaAuthor(s): Guodong Zhao, Yong Ma, Hui Li, Shiming Li, Yun Zhu, Xiaoyu Liu, Shangmin Xiong, Yi Liu, Jin Miao, Sujuan Fei, Minxue Zheng, Xiangwei ZhaoAbstractBackgroundMethylated SFRP2 was previously reported as a non-invasive biomarker for colorectal cancer (CRC) detection with a relatively low sensitivity for early stage CRC. The purpose of this study was to evaluate the performance of a new plasma based CRC screening assay, SpecColon test, which tested methylated SFRP2 and SDC2 simultaneously in a single qPCR reaction, in detecting CRC and advan...
CONCLUSIONS: MHR may be a significant and independent predictor of poor functional outcome in patients with AIS. PMID: 31941849 [PubMed - as supplied by publisher]
Authors: Ieda N, Assadullah, Minabe S, Ikegami K, Watanabe Y, Sugimoto Y, Sugimoto A, Kawai N, Ishii H, Inoue N, Uenoyama Y, Tsukamura H Abstract Accumulating evidence suggests that kisspeptin neurons in the arcuate nucleus (ARC), which coexpress neurokinin B and dynorphin, are involved in gonadotropin-releasing hormone (GnRH)/luteinizing hormone (LH) pulse generation, while the anteroventral periventricular nucleus (AVPV) kisspeptin neurons are responsible for GnRH/LH surge generation. The present study aims to examine whether GnRH(1-5), a GnRH metabolite, regulates LH release via kisspeptin neurons. GnRH(1-5) was...
In conclusion, caffeine decreased oxidative stress and adipogenesis in GO orbital fibroblasts in vitro. These findings may contribute to the development of new types of caffeine-containing pharmacological agents for use in the management of GO. PMID: 31941844 [PubMed - as supplied by publisher]
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