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Experimental Analysis of Atypically Long Finned Oscillating Heat Pipe for Ventilation Waste Heat Recovery Application

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Journal of Thermal Science 2020年第3期29卷 667-675页

作者： mAHAJAN Govinda CHO Heejin SmITH Aaron thompson Scott m. Rheem manufacturing MontgomeryAL 36109USA Department of mechanical Engineering Mississippi State UniversityMsissippi StateMS 39762USA Department of mechanical Engineering Auburn UniversityAubumnAL 36849USA

Oscillating heat pipes(OHP)which are constructed from a serpentine-arranged capillary tube possess a desirable aerodynamic form factor and provide for relatively high heat transfer rates via cyclic evaporation and condensation of an encapsulated working fluid with no internal wicking structure *** last two decades,OHP has been extensively investigated for its potential application in thermal management of various *** study presents an experimental investigation on the heat transfer performance of an atypically long finned *** heat transfer performance of the proposed OHP was analyzed and compared with a bare tube OHP with similar overall *** show that a unit row of finned OHP filled with n-pentane with fill ratio of 70%can recover up to(400±40)W of heat from a typical waste exhaust air *** additional pressure drop due to fins was estimated to be(6.8±2)Pa resulting in an increase of 1–2 W of fan power *** average heat recovery rate via finned OHP was found to be almost 80%more than bare tube OHP filled with same working fluid with same fill ratio.

关键词： oscillating heat pipe waste heat recovery ventilation

Climatic and environmental records in Guliya Ice Cap

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Science China Chemistry 1995年第2期38卷 228-237页

作者：姚檀栋焦克勤田力德李忠勤李月芳刘景寿皇翠兰谢超 L.G.thompson E.m.thompson Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Sciences Lanzhou 730000 China Byrd Polar Research Center The Ohio State University USA

The Guliya Ice Cap is the largest (with a total area of 376.1 m2 and an area cf 131 2 m2 at the flat top), highest (6 700 m a. s.l.) and coldest (with an ice temperature of -19℃ at 10 m depth) ice cap found in Central Asia so far. From 1990 to 1992, the oxygen isotope ratios, microparticle concentrations, anions, cations of a large number of samples from snow pits and ice cores were analysed to study the climatic and environmental characteristics of the Guliya Ice Cap. Being frozen to bedrock and with extremely low ice temperature, the ideal climatic and environmental informarion was recorded in Guliya Ice Cap. The distinct annual and seasonal cycle characteristics of the oxygen isotope ratio, microparticle concentration, anion and cation provide bases to date precisely the high-resolution time series in the ice cap. Oxygen isotope ratios decreased, microparticle concentrations and various chemical elements increased in the colder periods, while oxygen isotope values increased, microparticle concentrations and various chemical elements decreased during warmer periods, and the interpretation of various abrupt events will be the key to restore systematically various kinds of climatic and environmental information recorded in this ice cap. The records in the Guliya ice cores indicate that climatic wanning which happened in the middle 1980s was one of the most impressive events during the past several decades.

关键词： Guliya ice cap palaeoclimate.

Climate variation since the Last Interglaciation recorded in the Guliya ice core

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Science China Earth Sciences 1997年第6期40卷 662-668页

作者：姚檀栋 L.G.thompson 施雅风秦大河焦克勤杨志红田立德 E.m.thompson Lanzhou Institute of Glaciology and Geocryology Chinese Academy of Sciences Lanzhou 730000 China Byrd Polar Research Center Ohio State UniversityColumbusOH 43210USA

The climatic and environmental variations since the Last Interglaciation are reconstructed based on the study of the upper 268 m of the 309-m-long Guliya ice core. Five stages can be distinguished since the Last Interglaciation from the δ18O record in the Guliya ice core: Stage 1 (Deglaciation), Stage 2 (the Last Glacial maximum), Stage 3 (interstadial), Stage 4 (interstadial in the early glacial maximum) and Stage 5 (the Last Interglaciation). Stage 5 can be divided further into 5 substages; a, b, c, d, e. The δ18O record in the Guliya ice core indicates clearly the close correlation between the temperature variation on the Tibetan Plateau and the solar activities. The study indicates that the solar activity is a main forcing to the climatic variation on the Tibetan Plateau. Through a comparison of the ice core record in Guliya with that in the Greenland and the Antarctic, it can be found that the variation of large temperature variation events in different parts of the world is generally the same, but the variation amplitude of temperature is different.

关键词： climate variation Last Interglaciation Guliya ice core

A lateral ankle sprain during a lateral backward step in badminton:A case report of a televised injury incident

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Journal of Sport and Health Science 2023年第1期12卷 139-144页

作者： Daniel T.P.Fong Kam-ming mok Isobel m.thompson Yuehang Wang Wei Shan mark A.King National Centre for Sport and Exercise medicine School of SportExercise and Health SciencesLoughborough UniversityLoughboroughLE113TUUK Office of Student Affairs Lingnan UniversityHong Kong 999077China Department of Orthopaedics and Traumatology Prince of Wales HospitalFaculty of MedicineThe Chinese University of Hong KongHong Kong 999077China China Institute of Sport and Health Science Beijing Sport UniversityBeijing 100084China

Background:This study presents a kinematic analysis of an acute lateral ankle sprain incurred during a televised badminton *** kinematics of this injury were compared to those of 19 previously reported cases in the published ***:Four camera views of an acute lateral ankle sprain incurred during a televised badminton match were synchronized and rendered in3-dimensional animation software.A badminton court with known dimensions was built in a virtual environment,and a skeletal model scaled to the inj ured athlete’s height was used for skeletal *** ankle joint angle and angular velocity profiles of this acute injury were compared to the summarized findings from 19 previously reported cases in the published ***:At foot strike,the ankle joint was 2° everted,33° plantarflexed,and 18° internally *** inversion of 114° and internal rotation of 69° was achieved at 0.24 s and 0.20 s after foot strike,*** the foot strike,the ankle joint moved from an initial position of plantarflexion to dorsiflexion-from 33° plantarflexion to 53° dorsiflexion(range=86°).maximum inversion,dorsiflexion,and internal rotation angular velocity were 1262°/s,961°/s,and 677°/s,respectively,at 0.12 s after foot ***:A forefoot landing posture with a plantarflexed and internally rotated ankle joint configuration could incite an acute lateral ankle sprain injury in *** of lateral ankle sprains in badminton should focus on the control and stability of the ankle joint angle during forefoot landings,especially when the athletes perform a combined lateral and backward step.

关键词： Ankle Biomechanics Injury prevention Ligament injuries Sports medicine

Another look at silent circulation of poliovirus in small populations

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Infectious Disease modelling 2018年第1期3卷 107-117页

作者： Dominika A.Kalkowska Radboud J.Duintjer Tebbens Kimberly m.thompson Kid Risk Inc.605 N.High St.#253ColumbusOH 43215USA

Background:Silent circulation of polioviruses complicates the polio endgame and motivates analyses that explore the probability of undetected circulation for different scenarios.A recent analysis suggested a relatively high probability of unusually long silent circulation of polioviruses in small populations(defined as 10,000 people or smaller).methods:We independently replicated the simple,hypothetical model by Vallejo et al.(2017)and repeated their analyses to explore the model behavior,interpretation of the results,and implications of simplifying ***:We found a similar trend of increasing times between detected cases with increasing basic reproduction number(R0)and population ***,we found substantially lower estimates of the probability of at least 3 years between successive polio cases than they reported,which appear more consistent with the prior *** small and isolated populations may sustain prolonged silent circulation,our reanalysis suggests that the existing rule of thumb of less than a 5%chance of 3 or more years of undetected circulation with perfect surveillance holds for most conditions of the model used by Vallejo et *** most realistic ***:Avoiding gaps in surveillance remains critical to declaring wild poliovirus elimination with high confidence as soon as possible after the last detected poliovirus,but concern about transmission in small populations with adequate surveillance should not significantly change the criteria for the certification of wild polioviruses.

关键词： Polio Small populations Silent circulation Stochastic modeling

Design,Synthesis,and Applications of mesoporous Covalent Organic Frameworks

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CCS Chemistry 2024年第1期6卷 57-68页

作者： Niyati Arora Cassandra Flores milinda C.Senarathna Christina m.thompson Ronald A.Smaldone Department of Chemistry and Biochemistry University of TexasDallasRichardsonTexas 75080

Covalent organic frameworks(COFs)are highly ordered and permanently porous organic polymers that can be classified as two-dimensional or *** tunable design and crystalline order endow a range of pore sizes,shapes,functions,and applications that differentiate them from other *** COF pore sizes and shapes rely on the geometry of the monomers and dynamic covalent chemistry,while the stacking of the sheets relies on noncovalent *** tunability allows for post-modification or the incorporation of additional functional groups for the reinforcement by various noncovalent *** limits of mesoporous COFs are still being investigated,with the design rules continuing to *** we report a comprehensive review of mesoporous COFs,explore strategies for large pore reinforcement,highlight structural design and features,elucidate their various functions and applications,discuss fundamental challenges faced that need to be addressed,and predict future directions.

关键词： covalent organic frameworks mesoporous supramolecular chemistry polymers pore size

Effect of best management practice implementation on sediment and phosphorus load reductions at subwatershed and watershed scale using SWAT model

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International Journal of Sediment Research 2016年第4期31卷 386-394页

作者： Jasmeet Lamba Anita m.thompson K.G.Karthikeyan John C.Panuska Laura W.Good Biosystems Engineering Department Auburn University Department of Soil Science University of Wisconsin-Madison Department of Biological Systems Engineering University of Wisconsin-Madison

Identification of areas contributing disproportionately high amount of pollutants(i.e.,critical source areas(CSAs)) to streams is important to efficiently and effectively target best management practices(BmPs).Process-based models are commonly used to identify CSAs and evaluate the impact of alternative management practices on pollutant load *** objective of this study was to use the Soil and Watershed Assessment Tool(SWAT) to identify CSAs at the subwatershed level and evaluate the impact of alternative BmPs on sediment and total phosphorus(TP) load reductions in the Pleasant Valley watershed(50 km~2) in South Central Wisconsin(USA).The Nash-Sutcliffe efficiency,percent bias,and coefficient of determination ranged from 0.58 to 0.71,-12.87 to 38.33,and 0.67 to 0.79,respectively,indicating that SWAT was able to predict stream flow,sediment and TP loadings at a monthly time-step with sufficient *** on the SWAT simulation results,annual average(2006-2012) subwatershed yield for sediment and TP ranged from 0.06 to 3.14 tons hayrand 0.04 to1.9 kg hayr,*** croplands were the major source ofsediment and TP in this watershed(> 84%).Reduction in sediment and TP loading ranged from 66%to 99%at the subwatershed level after conversion of croplands to Conservation Reserve Program(CRP) grasslands in subwatersheds identified as *** the other hand,reduction in sediment and TP loading with implementation of no-till practices ranged from only 14%to 25%.At the watershed outlet,sediment and TP loading reduction wasmplementation of no-till practices because only about 8%of the watershed area was targeted for BmPs and/or resuspension of sediment deposited on the stream bed masked the downstream improvements in water quality.

关键词： SWAT Critical source areas Phosphorus Sediment Tillage Watershed modeling

Selenium Regulation of Selenium-dependent Glutathione Peroxidases in Animals and Transfected CHO Cells

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Biomedical and Environmental Sciences 1997年第2期10卷 346-355页

作者： ROGER A. SUNDE BRITTA m. thompson mELANIE D. PALm SHERRI L.WEISS KEVIN m. thompson AND JACQUELINE K. EVENSON(Nutritional Sciences Program and Department of Biochemistry,University of missouri, Columbia mO 65211 USA) Nutritional Sciences Program University of Missouri Columbia 65211 USA.

Glutathione peroxidase (GPX1) was the first identified selenium-dependent enzyme, and this enzyme has been most useful as a biochemical indicator of selenium (Se) status and the parameter of choice for determining Se requirements. We have continued to study Se regulation of GPX1 to better understand the underlying mechanism and to gain insight into how cells themselves regulate nutrient status. In progressive Se deficiency in rats, GPX1 activity,protein and mRNA all decrease in a dramatic, coordinated and exponential fashion such that Se-deficient GPX1 mRNA levels are 6-15% of Sexadequate levels. mRNA levels for other Sedependent proteins are far less decreased in the same animals. The mRNA levels for a second Se-dependent peroxidase, phospholipid hydroperoxide glutathione peroxidase (GPX4 ), are little affected by Se deficiency, demonstrating that Se regulation of GPX1 is unique. Se regulation of GPX1 activity in growing male and female rats shows that the Se requirernent is 100 ng/g diet, based on liver GPX1 activity; use of GPX1 mRNA as the parameter indicates that the Se requirement is nearer to 50 ng Se/g diet in both male and female rats. This approach will readily detect an altered dietary Se requirement, as shown by the incremental increases in dietary Se requirement by 150, 100 or 50 ng Se/g diet in Seudeficient rat pups repleted with Se for 3, 7 or 14 d, respectively. Studies with CHO cells stably transfected with recombinant GPX1 also show that overexpression of GPX1 does not alter the minimum level of media Se necessary for Se-adequate levels of GPX1 activity or mRNA. We hypothesize that classical GPX1 has an integral biological role in the mechanism used by cells to regulate Se status,making GPX1 an especially useful and effective parameter for determining Se requirements in animals

关键词： GPX mRNA Selenium Regulation of Selenium-dependent Glutathione Peroxidases in Animals and Transfected CHO Cells CHO

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SD振子,SD吸引子及其应用

振动工程学报 2007年第5期20卷 454-458页

作者：曹庆杰 Wiercigroch m Pavlovskaia E E Grebogi C thompson m T 石家庄铁道学院数理系河北石家庄050043 Centre for Applied Dynamics Research Department of EngineeringUniversity of AberdeenKing's CollegeAberdeen AB24 3UEScotlandUK

提供一个新振子命名为SD振子,受扰振子的吸引子称为SD吸引子,它的动力学行为决定于一个光滑参数α的连续变化。这是一个具有强非线性特征的振动系统,它提供了一个从光滑动力学行为向不连续动力学行为光滑转迁的典型示范,这种直接的转迁... 详细信息

提供一个新振子命名为SD振子,受扰振子的吸引子称为SD吸引子,它的动力学行为决定于一个光滑参数α的连续变化。这是一个具有强非线性特征的振动系统,它提供了一个从光滑动力学行为向不连续动力学行为光滑转迁的典型示范,这种直接的转迁并不需要连续系统的过渡。当系统为光滑动力学性态时,表现出与Du ffing系统类似的双井等标准动力学行为,而当系统表现为不连续性态时,提供一个新的非连续动力系统模型,它除了表现为标准的双井动力学行为外,也表现出一些新的非标准动力学行为。文中展示了这个系统的转迁过程和特性及其相应的吸引子的复杂动力学行为。

关键词： SD吸引力 Lyapunov指数类鞍点类同宿轨道