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Evaluating a school based childhood obesity intervention for posture and comfort

Health 2013年第8期5卷 54-60页

作者： Mark Benden adam pickens Eva Shipp Jase Perry Drew Schneider Texas A & M Health Science Center College Station USA

Background: Research shows that students who are more active throughout the day have fewer reports of body part discomfort and greater energy expenditure needed to combat childhood obesity. Many factors may contribute to the overall health of the child, including the postures that are required to complete assigned tasks at their school workstations. Decreasing sedentary behaviors in children through the use of standing desks at school has been shown to increase calorie expenditure and may be a viable approach to the energy imbalance typical of modern children. The objective of this research was to quantify and analyze sub-optimal postures and self-reported discomfort of students during the use of traditional seated and stand-biased desks to determine whether any unintended consequences of the intervention were present. Methods: A postural analysis based on the Portable Ergonomic Observation (PEO) method was used to assess the posture of 42 elementary school students as they worked at their assigned workstation (either standing or seated). Two classrooms contained stand-biased workstations (15 students) and two classrooms had traditional seated workstations (27 students). Each student was assessed three times at 10 minutes, for a total of 30 minutes of observations each. The percent of time spent in preferred versus non-preferred postures was then computed. Student body part discomfort surveys were used to assess the discomfort of students between the two groups. The relationship between type of workstation and percent time in non-preferred postures and body discomfort was examined using Wilcoxon ranksum tests and Fisher’s exact tests, respectively. The significance level was p ≤ 0.05 for all of the two-sided tests. Results: No significant difference was found between the two groups and time spent in non-preferred postures and body discomfort, children using stand-biased workstations reported less discomfort overall. Stand-biased desks presented no additional ergonom

关键词： Childhood Obesity Elementary Health Ergonomics Stand-Biased Posture

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Estimation of the Power of the Anomalous Microwave Emission

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World Journal of Condensed Matter Physics 2020年第3期10卷 105-117页

作者： Kristopher T. pickens Giovanna Scarel Department of Physics and Astronomy James Madison University Harrisonburg VA USA

Context and Background: The product of the electromagnetic (EM) wave’s power P times its period τ, i.e. Pτ, is the amount of energy conserved in EM wave’s absorption in matter. Whether Pτ is the amount of energy conserved in the emission of EM waves from matter is not assessed. Motivation: In this research, we perform a computational study to explore the ability of Pτ to represent the amount of energy conserved in EM wave’s emission from matter. Hypothesis: Since the magnitude of the power P of emitted EM waves computed through Larmor’s formula for a rotating dipole is excessively small, we alternatively hypothesize that Pτ and the law of conservation of energy can lead to a realistic estimation of P. Methods:

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An electropenetrography waveform library for the probing and ingestion behaviors of Culex tarsalis on human hands

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Insect Science 2024年第4期31卷 1165-1186页

作者： Anastasia M.W.Cooper Samuel B.Jameson Victoria pickens Cameron Osborne Elaine A.Backus Kristopher Silver Dana N.Mitzel Department of Entomology Kansas State UniversityManhattanKansasUSA Department of Tropical Medicine Tulane University School of Public Health and Tropical MedicineNew OrleansLos AngelesUSA USDA Agricultural Research Service San Joaquin Valley Agricultural Sciences CenterParlierCaliforniaUSA National Bio and Agro-Defense Facility USDA Agricultural Research ServiceManhattanKansasUSA

Culex tarsalis Coquillett(Diptera:Culicidae)mosquitoes are capable of vectoring numerous pathogens affecting public and animal ***,the probing behaviors of mosquitoes are poorly understood because they occur in opaque ***(EPG)has the potential to elucidate these behaviors by recording the electrical signals generated during *** used an AC–DC EPG with variable input resistors(Ri levels)to construct a waveform library for *** feeding on human *** events associated with mosquito probing were used to characterize waveforms at four Ri levels and with two electrical current *** optimal settings for EPG recordings of *** probing on human hands was an Ri level of 10^(7)Ohms using an applied signal of 150 millivolts alternating *** for *** included those previously observed and associated with probing behaviors in Aedes aegypti L.(Diptera:Culicidae):waveform families J(surface salivation),K(stylet penetration through the skin),L(types 1 and 2,search for a blood vessel/ingestion site),M(types 1 and 2,ingestion),N(type 1,an unknown behavior which may be a resting and digestion phase),and W(withdrawal).However,we also observed variations in the waveforms not described in ***,which we named types L3,M3,M4,and *** investigation enhances our understanding of mosquito probing *** also provides a new tool for the automated calculation of peak *** work will facilitate future pathogen acquisition and transmission studies and help identify new pest and disease management targets.

关键词： AC-DC blood feeders electrical penetration graph EPG human hands mosquitoes waveform library

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A ten-year experience of inferior vena cava reconstruction for malignancy:The importance of a multidisciplinary approach with hepatobiliary surgery

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Hepatobiliary & Pancreatic Diseases International 2020年第4期19卷 396-398页

作者： Maria R.Baimas-George Ryan C.pickens Jesse K.Sulzer Dionisios Vrochides John B.Martinie David M.Levi David A.Iannitti Division of Hepatopancreatobiliary Surgery Department of SurgeryCarolinas Medical Center1025 Morehead Medical DriveSuite 600CharlotteNC 28204USA Division of Transplant Surgery Department of SurgeryCarolinas Medical CenterCharlotteNCUSA

To the Editor,Tumor invasion of the inferior vena cava(IVC)through direct erosion is a rare and poor prognostic feature of aggressive hepatic or perihepatic malignancies[1,2].Literature shows poor response to chemotherapy,such that resection often is the only option for improved survival[3].Multidisciplinary collaborations can expand technical options;incorporation of transplant techniques has led to successful R0 resection involving difficult vascular reconstruction and extended resection[4,5].This study describes and analyzes the ten-year collaborative experience of hepatobiliary(HPB)surgeons in management of malignancies involving the perihepatic IVC.

关键词： hepato hepatic invasion

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含锂铝合金的可焊性

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导弹与航天运载技术(中英文) 1987年第10期 50-61页

作者： J.R.pickens 夏德顺

与普通铝合金比较,含锂铝合金具有较低的密度和较高的弹性模量。目前正在进行将这种合金用于飞行器的研究,这类应用通常涉及机械连接工艺。因而含锂铝合金的可焊性问题,相对地说来不太受到重视。本文要讨论含锂铝合金的可焊性,大量的焊... 详细信息

与普通铝合金比较,含锂铝合金具有较低的密度和较高的弹性模量。目前正在进行将这种合金用于飞行器的研究,这类应用通常涉及机械连接工艺。因而含锂铝合金的可焊性问题,相对地说来不太受到重视。本文要讨论含锂铝合金的可焊性,大量的焊接研究都是在苏联 Al-5%Mg-2%Li 合金01420上完成的。01420和其它种含锂的铝合金,确实可以熔焊,而且其焊接件具有较高的焊接接头强度系数。

关键词：锂合金铝合金锂铝合金熔焊

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变革性无网点银行业务的监管:使用移动电话和其他技术增加金融服务的覆盖面(上)

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西部金融 2012年第11期 19-26页

作者： Timothy R.Lyman Mark pickens David Porteous 不详

世界银行扶贫协商小组(Consultative Group to Assist the Poor,CGAP)是世界银行下属的一家研究机构,致力于改善世界贫困人口的金融可获得性。经与CGAP协商,CGAP同意授权《西部金融》非排他性刊登其研究成果。本期特别选登了CGAP和英国... 详细信息

世界银行扶贫协商小组(Consultative Group to Assist the Poor,CGAP)是世界银行下属的一家研究机构,致力于改善世界贫困人口的金融可获得性。经与CGAP协商,CGAP同意授权《西部金融》非排他性刊登其研究成果。本期特别选登了CGAP和英国国际发展部(DFID)联手,与世界700多家移动电话运营商组成的全球行业协会合作进行的互联网金融方面的研究成果。该文主要对发展中国家发展无网点银行业务的现状和监管情况进行了介绍,内容详细,并配有案例分析及监管政策评述,对我国互联网金融发展和监管具有重要的参考价值。

关键词：监管政策金融服务移动电话银行业务网点覆盖面变革性世界银行

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变革性无网点银行业务的监管:使用移动电话和其他技术增加金融服务的覆盖面(下)

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西部金融 2012年第12期 20-25,33页

作者： Timothy R.Lyman Mark pickens David Porteous

需要考虑的新课题.参加调查的国家的政策制订者和监管部门不仅仅担心一些先决条件可能会使变革性的无网点银行无法启动,他们也都不同程度地开始考虑一些监管规定,降低风险,以免出现灾难性的失败,使公众对无网点银行业务这个概念失去信心... 详细信息

需要考虑的新课题.参加调查的国家的政策制订者和监管部门不仅仅担心一些先决条件可能会使变革性的无网点银行无法启动,他们也都不同程度地开始考虑一些监管规定,降低风险,以免出现灾难性的失败,使公众对无网点银行业务这个概念失去信心.他们中间有些也在研究市场未来的发展趋势,至少已经开始考虑可能会影响无网点银行业务扩大和可持续发展的问题.

关键词：银行金融机构网点金融财政金融变革性

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拖曳阵状态评价系统

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声学与电子工程 1988年第2期 42-47页

作者： George O.pickens ,张诚昌 ,张润中

构成了一种能沿着水听器组成的拖曳阵从其前端到达末端的装置。装置上带有一个小型声发射器,当此装置通过各个水听器时,向相应的水听器发射测试信号。记录各个水听器对测试信号的响应,可以就地校准基阵。还可以补充地或者交替地记录这... 详细信息

构成了一种能沿着水听器组成的拖曳阵从其前端到达末端的装置。装置上带有一个小型声发射器,当此装置通过各个水听器时,向相应的水听器发射测试信号。记录各个水听器对测试信号的响应,可以就地校准基阵。还可以补充地或者交替地记录这些响应,用于确定基阵对理想直线(一般是水平线)的偏离。

关键词：水听器测试信号前端拖曳阵水声换能器线列阵线列基阵声纳基阵基阵声学仪器发射器发射装置

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