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国外金属热处理 1989年第6期10卷 31-34,58页

作者： roy j. cunningham 谢敏修吉林省通化石油化工机械厂研究所

对波音直升飞机进行的一项研究,其目的是检验9310钢真空渗碳的有效性,提出所体验到的工艺优点,所遇到的问题以及拟定的解决办法。

关键词：直升飞机齿轮渗碳真空热处理

Performance Prediction of a Multi-Stage Wind Tower for Indoor Cooling

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j.urnal of Thermal Science 2012年第4期21卷 327-335页

作者： roy j. Issa Byungik Chang Department of Engineering and Computer Science West Texas A&M University Canyon

A theoretical model is developed to establish an indepth understanding of the performance of a three-stage wind tower with a bypass system for indoor cooling in rural dry and hot climates. Model simulations are presented for a wide range of ambient conditions that include inlet wind speed, inlet temperature and relative humidity. Simulation results provide an insight into the desirable water flow rates and air-to-water loadings for comfort zone tem-peratures and relative humidity levels at the exit of the wind tower. Simulations show wind towers with variable cross-sections provide an increase in the cooling power for the same inlet wind speed, inlet air temperature and relative humidity when compared to wind towers with a constant cross-section. The study shall lead to a better understanding to designing wind towers that are both environmentally friendly and energy efficient.

关键词： Wind tower Cooling power Cooling effectiveness Relative humidity

Expression of octopaminergic receptor genes in 4 nonneural tissues in female Nicrophorus vespilloides beetles

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Insect Science 2015年第4期22卷 495-502页

作者： Christopher B. cunningham Mary K. Douthit Allen j. Moore Department of Genetics University of Georgia Athens GA 30602 USA

Octopamine regulates the function of many tissues and physiological processes in invertebrates. The expression of octopamine receptor genes has been examined in multiple tissue types in several different insect orders. However, little work has addressed this issue in Coleoptera. Most studies characterize individual genes in different tissue types, but here we describe the expression of 6 octopamine receptor genes in thoracic musculature, oviducts, Malpighian tubules, and fat body of female Nicrophorus vespilloides beetles to characterize both different genes and different tissues within a single study. We then compare the gene expression profiles found in this beetle to other insects to examine the extent to which expression profiles are conserved across insects. We also examine the relative involvement of octopamine verses octopamine/tyramine receptors based on receptor gene expression in each tissue to help elucidate if tyramine plays a role in the regulation of these tissues. We find a high degree of overlap in the expression profile of the 6 genes examined in the thoracic muscula^tre, a moderate amount for the oviducts, and divergent profiles for Malpighian tubules and fat body. Based on expression difference in receptor subtypes, our results also support the suggestion that tyramine is a biogenic amine with physiological actions separate from octopamine.

关键词： biogenic amines Coleoptera G-protein coupled receptors quantitative real-time PCR

An improved culturing method for opiine fruit fly parasitoids and its application to parasitoid monitoring in the field

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Insect Science 2018年第1期25卷 99-108页

作者： Ayad Masry Michael j. Furlong Anthony R. Clarke j.hn Paul cunningham School of Earth Environmental and Biological Sciences School Queensland University of Technology (QUT) Brisbane Queensland Australia School of Biological Sciences the University of Queensland St Lucia Queensland Australia plant Biosecurity Cooperative Research Centre Bruce ACT Australia Department of Economic Development Jobs Transport and Resources AgriBio Centre La Trobe University Bundoora Victoria Australia

Good culturing methods play an important role in the study of insect behavior and its application to pest management. Here, we describe and validate a new method for rearing the parasitoid wasp, Diachasmirnorpha kraussii, which attacks some of the world＇s worst fruit fly pests and is an internationally used biological control agent. Our method differs from standard culturing approaches by presenting adult wasps with host- infested artificial media within a ＂culturing bag,＂ which mimics a natural （fruit） oviposition substrate. In laboratory trials using wild collected D. kraussii, the culturing bag method was compared to the use of host-infested nectarines, and a commonly used laboratory method of presenting host-infested artificial media within Petri dishes. The culturing bag method proved to be a significant improvement on both methods, combining the advantages of high host survival in artificial media with parasitism levels that were the equivalent to those recorded using host-infested fruits. In our field study, culturing bags infested with the Queensland fruit fly, Bactrocera tryoni, and hung in a mixed peach and nectarine orchard proved to be effective ＂artificial fruits＂ attracting wild D. kraussii for oviposition. Significantly more adult wasps were reared from the culturing bags compared to field collected fruits. This was shown to be due to higher fruit fly larval density in the bags, as similar percentage parasitism rates were found between the culturing bags and ripe fruits. We discuss how this cheap, time-efficient method could be applied to collecting and monitoring wild D. kraussii populations in orchards, and assist in maintaining genetic variability in parasitoid laboratory cultures.

关键词： Bactrocera biological control fruit fly mass rearing natural enemies Tephritidae wasp

Heat Transfer Optimization for Air-Mist Cooling between a Stack of Parallel Plates

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j.urnal of Thermal Science 2010年第3期19卷 253-260页

作者： roy j.Issa Mechanical Engineering Division Department of Engineering and Computer Science West Texas A&M University CanyonTexas 79016USA

A theoretical model is developed to predict the upper limit heat transfer between a stack of parallel plates subj.ct to multiphase cooling by air-mist *** model predicts the optimal separation distance between the plates based on the development of the boundary layers for small and large separation distances,and for dilute mist *** results show the optimal separation distance to be strongly dependent on the liquid-to-air mass flow rate loading ratio,and reach a limit for a critical *** these dilute spray conditions,complete evaporation of the droplets takes *** results also show the optimal separation distance decreases with the increase in the mist flow *** proposed theoretical model shall lead to a better understanding of the design of fins spacing in heat exchangers where multiphase spray cooling is used.

关键词： Air-mist Multiphase Heat transfer Liquid-to-air loading

Transforming bilayer MoS2 into single-layer with strong photoluminescence using UV-ozone oxidation

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Nano Research 2015年第12期8卷 3878-3886页

作者： Weitao Su Naresh Komar Steve j. Spencer Ning Dai Debdulal roy Institute of Materials Physics Hangzhou Dianzi University Hangzhou 310018 China Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo 315201 China National Physical Laboratory Hampton Road Teddington Middlesex TWI 10LW UK

The use of single-layer MoS2 in light emitting devices requires innovative methods to enhance its low photoluminescence （PL） quantum yield. In this work, we report that single-layer MoS2 with a strong PL can be prepared by oxidizing bilayer MoS2 using W-ozone oxidation. We show that as compared to mechanically-exfoliated single-layer MoS2, the PL intensity of the single-layer MoS2 prepared by W-ozone oxidation is enhanced by 20-30 times. We demonstrate that the PL intensity of both neutral excitons and trions （charged excitons） can be greatly enhanced in the oxidized MoS2 samples. These results provide novel insights into the PL enhancement of single-layer MoS2.

关键词： single-layer MoS2 W-ozone oxidation photoluminescence enhancement tip-enhanced Raman spectroscopy

Mathematical modeling of nanoscale MOS capacitance in the presence of depletion and energy quantization in a poly-silicon gate

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j.urnal of Semiconductors 2010年第11期31卷 5-8页

作者： Amit Chaudhry j.N.roy Institute of Engineering and Technology Panjab University Solar Semiconductor Pvt.Ltd.

A model has been developed to study the effect of depletion and energy quantization at the poly-silicon /oxide interface on the behavior of a nanometer scale n-MOSFET.A model of inversion charge density,including the inversion layer quantization using the variation approach in the substrate,has also been *** the exact calculations of the polygate potential under the depletion and quantization conditions,a C-V model has been developed. All the results have been compared with the numerical models reported in existing literature and they show good agreement.

关键词： BSIM inversion layers MOS devices quantization poly-depletion poly-quantization

Nanoscale strained-Si MOSFET physics and modeling approaches:a review

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j.urnal of Semiconductors 2010年第10期31卷 19-23页

作者： Amit Chaudhry j.N.roy Garima j.shi University Institute of Engineering and Technology Panjab University Solar Semiconductor Private Limited

An attempt has been made to give a detailed review of strained silicon technology. Various device models have been studied that consider the effect of strain on the devices, and comparisons have been drawn. A review of some modeling issues in strained silicon technology has also been outlined. The review indicates that this technology is very much required in nanoscale MOSFETs due to its several potential benefits, and there is a strong need for an analytical model which describes the complete physics of the strain technology.

关键词： mobility SiGe strained-Si technology CAD

SPICE compatible analytical electron mobility model for biaxial strained-Si-MOSFETs

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j.urnal of Semiconductors 2011年第5期32卷 36-41页

作者： Amit Chaudhry j.N.roy S.Sangwan UIET Panjab UniversityChandigarhIndia Solar Semiconductro Pvt.Ltd HyderabadIndia

This paper describes an analytical model for bulk electron mobility in strained-Si layers as a function of strain. Phonon scattering, columbic scattering and surface roughness scattering are included to analyze the full mobility model. Analytical explicit calculations of all of the parameters to accurately estimate the electron mobility have been made. The results predict an increase in the electron mobility with the application of biaxial strain as also predicted from the basic theory of strain physics of metal oxide semiconductor （MOS） devices. The results have also been compared with numerically reported results and show good agreement.

关键词： mobility SiGe strained-Si phonon surface roughness columbic

Physical activity and its relationship with COVID-19 cases and deaths:Analysis of ***

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j.urnal of Sport and Health Science 2021年第5期10卷 570-576页

作者： George B.cunningham Center for Sport Management Research and Education Department of Health and KinesiologyTexas A&M UniversityCollege StationTX 77843USA

Purpose:The study was to examine county-level associations of physical activity with coronavirus disease 2019(COVID-19)cases and deaths,per 100,000 county ***:Data were collected from publicly available data sources for 3142 counties and equivalents,including the District of *** health ratings,percentage uninsured,percentage unemployed,median household income,percentage female residents,percentage White residents,percentage of residents 65 years of age or older,and rural designation served as ***:The two-level random intercept regression showed that physical activity rates at the county level were statistically and negatively associated with COVID-19 cases and *** analyses showed that physical activity rates moderated the relationship between cases and deaths,such that the relationship was strongest when physical activity rates were ***:The results presented here offer empirical evidence of the benefits of county-level physical activity during a *** for public health and physical activity provision are discussed.

关键词： Coronavirus disease 2019 Deaths PA