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周期性控制液态磁共振自旋湍流的研究(英文)

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波谱学杂志 2010年第3期27卷 425-435页

作者： Susie Y. HUANG Jamie D. walls 林永雅加州大学洛杉矶校区化学与生物化学系

辐射阻尼和远程偶极场联合作用导致的混沌自旋动态能够产生常见于高场梯度磁共振实验中不可再现的实验结果,且该现象较先前所认为的更为常见.该文发展了一种基于射频微扰的周期性控制方法,以降低Lyapunov指数并抑制在波谱中的不稳定测... 详细信息

辐射阻尼和远程偶极场联合作用导致的混沌自旋动态能够产生常见于高场梯度磁共振实验中不可再现的实验结果,且该现象较先前所认为的更为常见.该文发展了一种基于射频微扰的周期性控制方法,以降低Lyapunov指数并抑制在波谱中的不稳定测量结果.同时讨论了周期性控制的设计原则及如何应用在诸多脉冲序列中,用以抑制自旋湍流.

关键词：暂态性自旋湍流辐射阻尼远程偶极场混沌控制信号放大

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甚低噪声FET输入放大器

宇航计测技术 1990年第6期9卷 73-75页

作者： StevenR.Jefferts F.L.walls 阎军长春大学

本文介绍了一种甚低噪声 FET 共源一共栅输入放大器的设计、原理和特性。这种放大器在频率为500Hz～500kHz 范围内的噪声指标小于1.2nV/Hz^(1/2)和0.25fA/Hz^(1/2)。适当加以变化,可用千1Hz～30MHz 频率范围的各种要求低噪声增益的场合。

关键词：放大器甚低器 FET 输入放大器

Avalanching Spin Amplification for Contrast and Sensitivity Enhancement in Magnetic Resonance

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Avalanching Spin Amplification for Contrast and Sensitivity ...

Part A: The Development of mI SMART, a Nurse-Led Technology Intervention for Multiple Chronic Conditions

第十四届全国波谱学学术会议

作者：林永雅黄香怡 Sandip Datta Jamie D.walls Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCalifornia 90095-1569United States Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCalifornia 90095-1569United States Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCalifornia 90095-1569United States Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCalifornia 90095-1569United States

＜正＞Ⅰ.Introduction Improving sensitivity and resolution is particularly important in applications of magnetic resonance （MR）to biomolecular structure determination,where insensitive and/or dilute spins are detect...

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Open Journal of Nursing 2016年第4期6卷 303-308页

作者： Jennifer A. Mallow Laurie A. Theeke Rebecca walls Elliott Theeke Brian K. Mallow School of Nursing West Virginia University Morgantown West Virginia USA Milan Puskar Health Right Morgantown West Virginia USA Sovern Run LLC Albright West Virginia USA

Background: The treatment of Multiple Chronic Conditions (MCC) is complex for both patients and providers. Used as integrated tools, technology may decrease complexity, remove the barrier of distance to obtain care, and improve outcomes of care. A new platform that integrates multiple technologies for primary health care called mI SMART (Mobile Improvement of Self-Management Ability through Rural Technology) has been developed. The purpose of this paper is to present to development of mI SMART, a nurse-led technology intervention for treating for MCC in primary care. Methods: The creation of mI SMART was guided by the model for developing complex nursing interventions. The model suggests a process for building and informing interventions with the intention of effectiveness, sustainability, and scalability. Each step in the model builds from and informs the previous step. Results: The process resulted in the integrated technologies of mI SMART. The system combines a HIPAA compliant, web-based, structure of mHealth sensors and mobile devices to treat and monitor multiple chronic conditions within an existing free primary care clinic. The mI SMART system allows patients to track diagnoses, medications, lab results, receive reminders for self-management, perform self-monitoring, obtain feedback in real time, engage in education, and attend visits through video conferencing. The system displays a record database to patients and providers that will be integrated into existing Electronic Health Records. Conclusion: By using the model for developing complex nursing interventions, a multifaceted solution to clinical problems was identified. Through modeling and seeking expert review, we have established a sustainable and scalable integrated nurse-led intervention that may increase access and improve outcomes for patients living in rural and underserved areas. The first trial of mI SMART has been completed and evaluated for feasibility, acceptability, and effectiveness in per

关键词： Multiple Chronic Conditions mHealth Telehealth Health Disparities Nursing Informatics

Forced Convective Heat Transfer and Pressure Drop of Air Flowing in a Rectangle Duct with Cross-Ribs on the Opposite walls

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Journal of Thermal Science 2002年第3期11卷 259-270页

作者： B.Deng T.T.wong w.Q.Tao School of Power and Energy Xi’an Jiaotong University Xi’an China Department of Mechanical Engineering The Hong Kong Polytechnic University Hong Kong

Experiments were conducted to investigate the forced convective heat transfer and flow friction of turbulent airflow in a rectangular duct with cross-ribs attached at the two principal walls in the Reynolds number range from 5000 to 40000. The effect of the rib cross angle (45° 60° 75° and the height (4 mm, 5 mm) of the cross-ribs on the forced convection and flow friction were tested. Non-dimensional correlations for the duct average Nusselt number and friction factor of cross-ribs duct were developed from the test data. Experiments were also conducted for the corresponding parallel ribs to compare their relative performance. The experimental results show that both of the convective heat transfer coefficient and friction factor were increased with cross-ribs, with 45°cross-ribs being the best. Compared with parallel ribs normal to the flow direction under identical flow rate and identical pumping power constraints, the cross-ribs can enhance heat transfer in the lower Reynolds number region, while

关键词： cross-ribs forced convection heat transfer enhancement.

Part B: The Feasibility and Acceptability of mI SMART, a Nurse-Led Technology Intervention for Multiple Chronic Conditions

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Open Journal of Nursing 2016年第4期6卷 323-332页

Background: An opportunity to improve care of multiple chronic conditions for those living in rural areas of the country may exist through the use of technology. Integrating technology interventions into existing rural health systems allows for increased access to healthcare services and augments self-management ability for patients. However, questions remain about acceptability and feasibility of technology use in rural populations. The purpose of this paper is to present the feasibility of mI-SMART, a HIPAA compliant, web-based, structure of mHealth sensors and mobile devices designed to overcome the known health determinant of access to care for rural, chronically ill patients by using technology. Methods: The study was conducted at a primary-care clinic that provided healthcare at no or low cost to low income adults. Inclusion criteria encompassed adults, with at least one chronic condition, having at least 3rd grade reading level, without having dementia/psychosis. Each participant was given a Nexus7 tablet and Bluetooth self-monitoring devices. Feasibility was evaluated in four ways and acceptability was evaluated with post-intervention questionnaires. Results: Thirty participants [mean age: 52 years (SD: 10.0, range: 29 - 74)] were majority female (70%), white (70%), married (60%), high-school educated or less (56.7%), impoverished (less than $20,000 per annum (56.7%), with multiple chronic conditions (96.7%)). During the trial, all participants were able to transmit data. No error messages were due to the mI-SMART system. Errors were user related and solved with technical support. Mean number of self-monitor transmissions was 219.7 [(SD: 197.4), range: 1 - 733]. Participants logged into the system an average of 163. 1 [(SD: 169.7), range: 2 - 568] times and viewed an average of 1092.1 [(SD: 1205.6), range: 8 - 3851] intervention components. Over eighty-six percent of participants sent data for 12 weeks and 43.1% used the intervention for longer. Conclusions:

关键词： Multiple Chronic Conditions mHealth Telehealth Health Disparities Nursing Informatics

REVIEw OF PM AND AM NOISE MEASUREMENT SYSTEMS

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REVIEW OF PM AND AM NOISE MEASUREMENT SYSTEMS

1998 International Conference on Microwave and Millimeter wave Technology

作者： Jan Li E.Ferre-Pikal C.Nelson F.L.walls National Institute of Standards and Technology

＜正＞This paper reviews the measurement technologies of phase noise and amplitude noise. Definitions and the appropriate units of phase noise and amplitude noise are *** channel,crosscorrelation and carrier suppressi...

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只要你爱她够深

英语沙龙（初级版） 2010年第2期 30-31页

作者： Bill walls 马骁

我的朋友约翰总会有些事儿给我讲，他深知年轻人必须让比自己年长、阅历更丰富的男人多多启发。比如说，什么样的人值得信任、如何关心别人以及怎样才能活得最充实。

关键词：《只要你爱她够深》英语学习学习方法阅读

Spin switching in antiferromagnets using Néel-order spin-orbit torques

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Chinese Physics B 2018年第10期27卷 88-95页

作者： P wadley K w Edmonds School of Physics and Astronomy University of Nottingham

Antiferromagnets offer considerable potential for electronic device applications. This article reviews recent demonstrations of spin manipulation in antiferromagnetic devices using applied electrical currents. Due to spin–orbit coupling in environments with particular crystalline or structural symmetries, the electric current can induce an effective magnetic field with a sign that alternates on the lengthscale of the unit cell. The staggered effective field provides an efficient mechanism for switching antiferromagnetic domains and moving antiferromagnetic domain walls, with writing speeds in the terahertz regime.

关键词： spintronics antiferromagnetic current-induced torques magnetic domains