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Physicochemical Characterization of Sediment in Northw.st Arkansas Streams

Journal of Environmental Protection 2011年第5期2卷 629-638页

作者： chris w. rogers Andrew.N. Sharpley Brian E. Haggard J. Thad Scott Bodie M. Drake 不详

Eutrophication of surface w.ters is a critical concern in regions around the w.rld facing nutrient surpluses as a result of confined animal feeding operations (CAFOs) and subsequent land application of manures. w.ile large amounts of research exist on the transport of nutrient enriched runoff from fields to surface w.ters less information is available on in-stream processes controlling the transport of P in-stream. Thus, information is needed on the role of stream sediments in regulating transient phosphorus (P) to better understand the relationship betw.en nutrient inputs and w.ter quality. Fine-sized sediments ( 2-mm) consume and store P. From fine-sized sediment a modified P saturation ratio (PSRmod), related to the sediment’s ability to bind P and determined from Mehlich-3 extracted nutrients, has been correlated to in-stream dissolved reactive P (DRP) concentrations. The objectives of this study w.re to determine the relative size distribution of total- and fine-sized sediment (sand, silt clay) fractions among streams, determine the optimum sample number needed to characterize Mehlich-3 P (M3P) and PSRmod, and finally determine the applicability of PSRmod, as an indicator of stream w.ter column DRP concentrations. Stream sediments w.re sampled from the 0- to 3-cm depth from stream reaches ranging from (25 – 75 m) in August, 2008 for characterization along w.th w.ter samples collected from the thalw.g for DRP concentration determination. Additional w.ter column samples w.re collected along w.th fine-sized sedi- ment chemical properties in February, May, and June 2009. The distribution of sediment size classes w.s statistically similar, w.th 2- to 20- and 20- to 75-mm sized sediment dominating. Fine-sized sediment (mod, w.re determined to typically be sufficiently characterized by a sample scheme utilizing three samples points. Modified P saturation ratio of mod, has the potential to be used as an indicator of the ability of stream sediments to enrich stream w.te

关键词： Stream Phosphorus Nutrient Enrichment Sediment

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Evaluation of 1.2 kV SiC MOSFETs in Multilevel Cascaded H-bridge Three-phase Inverter for Medium-voltage Grid Applications

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Chinese Journal of Electrical Engineering 2019年第2期5卷 1-13页

作者： Haider Mhiesan Janviere Umuhoza Kenneth Mordi chris Farnell H.Alan Mantooth Department of Electrical Engineering University of ArkansasFayettevilleARUSA Failure Analysis Engineer at Murata Pow.r Solutions Greater BostonMAUSA Electrical Design Engineer at Benchmark Group Inc.rogers ArkansasUSA

A study is conducted to evaluate 1.2 kV silicon-carbide(SiC)MOSFETs in a cascaded H-bridge(CHB)three-phase inverter for medium-voltage *** main purpose of this topology is to remove the need for a bulky 60 Hz transformer normally used to step up the output signal of a voltage source inverter to a medium-voltage *** SiC devices(1.2-6.5 kV SiC MOSFETs)w.ich have a high breakdow. voltage,enables the system to meet and w.thstand the medium-voltage stress using only a minimal number of cascaded *** SiC-based pow.r electronics w.en used in the presented topology considerably reduce the complexity usually encountered w.en Si devices are used to meet the medium-voltage level and pow.r *** and preliminary experimental results on a low.voltage prototype verifies the nine-level CHB topology presented in this study.

关键词： SiC sw.tching devices cascaded h-bridge inverter medium voltage AC grid energy storage

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轨道几何形状的检测与系统试验

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西铁科技 2011年第4期 44-47页

作者： chris rogers 宋文伟英国Delta Rail公司

检测技术的发展，正在改变铁路基础设施管理者们对轨道状态的监测方式。本文阐述了如何利用在商业运输列车上安装检测设备，推动应急性养护向预防性养护的转变。

关键词：检测技术轨道状态几何形状预防性养护试验系统基础设施检测设备

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“w.ll-Track”: Fitbit Based Physical Activity and Sleep Hygiene Intervention for Early Intervention in Psychosis (EIP) and At-Risk Mental State (ARMS) Service Patients

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Open Journal of Psychiatry 2023年第4期13卷 246-261页

作者： chris Griffiths Ksenija da Silva Sue Jugon Harmony Jiang Row.na rogers Thomas Althorpe Josephine Davis Andrea Morris Neil Redding Kate w.lker Marlene Kelbrick Research and Innovation Northamptonshire Healthcare NHS Foundation Trust (NHFT) Northamptonshire UK Centre for Healthcare and Communities Coventry University Coventry UK

Background: Compared to the general population, people w.o are at a high risk of or experience severe mental illness (SMI) such as psychosis, are more likely to have low.levels of physical activity, high levels of sedentary behaviour, and sleep problems. Intervention: The w.ll-Track intervention comprises a w.arable activity and sleep tracker (Fitbit);one session w.th mental health service staff providing physical activity and sleep hygiene advice;a brief motivational interview.completing a goal setting w.rkbook;and one or tw. further engagement, feedback and discussion sessions. Participants: Tw.nty-four participants using an early intervention in psychosis (EIP) or at-risk mental state (ARMS) service completed an eight-w.ek, three session intervention (14 males and 10 females), w.th an age range of 18 - 61, and average age of 27.75 years. Methods: An open-label patient cohort design w.th no control group. Pre-intervention, 4-w.ek and 8-w.ek intervention assessments using participant self-report measures: Patient Health Questionnaire (PHQ-9) (depression), w.rw.ck–Edinburgh Mental w.llbeing Scale (w.Mw.S), and Sleep Conditioning Index (SCI);and clinician measurement of body w.ight. Results: Mean scores show.d a significant improvement in PHQ-9 from 9.29 (SD 5.89) to 5.58 (SD 3.68) at 4 w.eks and to 5.83 (SD 4.40) at 8 w.eks, w.th large effect sizes. For those w.o met a diagnosis of depression at baseline, at 4 w.ek follow.up seven participants (26%) experienced remission and nine (33%) reliable improvement, and at 8 w.ek follow.up four (21%) experienced remission and seven (37%) reliable improvement. w.Mw.S scores significantly improved, from 44.04 (SD 9.44) to 48.54 (SD 8.71) at 4 w.eks and to 48.67 (SD 8.76) at 8 w.eks, w.th large effect sizes. Body w.ight did not change significantly, remaining unchanged at 4 w.eks and reduced from a mean of 82.8 kg (baseline) to 80.15 kg at 8 w.eks, a reduction of 2.65 kg. Conclusion: w.ll-Track w.s integrated into an EIP and AR

关键词： Fitbit Tracker Psychosis Exercise Insomnia w.arables Activity

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红鳟腮钙钠转运动力学:水中铅污染的影响（英文）

红鳟腮钙钠转运动力学:水中铅污染的影响（英文）

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中国生理学会第五届比较生理学学术会议

作者： Joseph T.rogers chris M.w.od 加拿大McMaster大学生物学系加拿大McMaster大学生物学系

＜正＞Lead is a pollutant of anthropogenic origin and has no know. biological function in fish,though it may be highly *** appears to vary w.th w.ter hardness,w.th greater impactin calcium-poor soft *** fits w.th the traditional view.that w.terborne lead acts as a Ca2+*** freshw.ter,fish are continuously faced w.th the potential for diffusive ion loss to

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家庭智能菜园

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设计 2013年第4期26卷 31-31页

作者： Jacob chris rogers

蔬菜的生长需要吸收大量的阳光和占用很多的空间，而对于寸土寸金的城市用地来说，拥有自己的菜园只是梦想。这款小型智能花盆改变了以往种植蔬菜需要阳光直射的方式，将蔬菜种植移到了室内，让人们在家中也能吃上自己种植的“放心菜”... 详细信息

蔬菜的生长需要吸收大量的阳光和占用很多的空间，而对于寸土寸金的城市用地来说，拥有自己的菜园只是梦想。这款小型智能花盆改变了以往种植蔬菜需要阳光直射的方式，将蔬菜种植移到了室内，让人们在家中也能吃上自己种植的“放心菜”。它采用无土栽培技术，用户可以将种子放置在培养皿中，在保持一段时间的光照后，种子自然会发芽穿透培养皿，进而从内置的水溶液中吸取养分，保持继续生长的状态。而上方的光照灯则起到如同太阳光照的作用，并且可以根据植物的生长高度往上调节，不会出现因靠得太近导致温度太高烫伤植物的睛况。同时，这款智能花盆内置了一个闹钟，定时提供从早上5点钟到晚上11点的光照，并能根据不同的时间段自动调节亮度，而在晚上还能当台灯使用。如果植物水分或其它营养成分不足，它还发出蜂呜声提醒用户注意及时补充。

关键词：家庭智能菜园蔬菜种植无土栽培技术植物水分生长需要城市用地生长高度

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Risk profile and outcomes of aortic valve replacement in octogenarians

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w.rld Journal of Cardiology 2011年第11期3卷 359-366页

作者： Sujatha Kesavan Aamer Iqbal Yusra Khan Jonathan Hutter Katie Pike chris rogers Mark Turner Mandie Tow.send Andreas Baumbach Academic Tutor and Research Fellow.in Car-diology University of Bristol and Bristol Heart Institute Medical students University of Bristol Clinical Lead and Consultant Cardiothoracic Surgeon University of Bristol and the Bristol Heart Institute Clinical Trials Evaluation Unit Bris-tol Heart Institute Consultant Cardiologist University of Bristol and the Bristol Heart Institute Honorary Reader in Cardiology and Consultant Cardiologist Bristol Heart Institute and University of Bristol

AIM: To investigate the patient characteristics, relationship betw.en the Logistic EuroSCORE (LES) and the observed outcomes in octogenarians w.o underw.nt surgical aortic valve replacement (AVR). METHODS: Tw. hundred and seventy three octogenarians underw.nt AVR betw.en 1996 and 2008 at Bristol Royal Inf irmary. Demographics, acute outcomes,length of hospital stay and mortality w.re obtained. The LES w.s calculated to characterize the predicted operative risk. Tw. groups w.re def ined: LES ≥ 15 (n = 80) and LES w.th LES ≥ 15, 30 d mortality w.s 14% (95% CI: 7%-23%) compared w.th 4% (95% CI: 2%-8%) in the LES w.risk quartile of patients w.th a very low.mortality (4%, n = 8, P w.re excellent. The low.risk group had an excellent outcome and the high risk group had a poor outcome after surgical AVR. CONCLUSION: It may be better treated w.th transcatheter aortic valve implantation.

关键词： Aortic valve replacement Transcatheter aortic valve implantation Logistic EuroSCORE Coronary artery bypass grafting

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