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Study on the Microsecond Pulse Homogeneous Dielectric Barrier Discharges in Atmospheric Air and Its Influencing Factors

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Plasma Science and Technology 2011年第6期13卷 676-681页

作者：方志雷枭蔡玲玲邱毓昌 edmund KUFFEL School of Automation and Electrical Engineering Nanjing University of Technology State Key Laboratory of Electrical Insulation and Power Equipment xi'an Jiaotong University Department of Electrical and Computer Engineering University of Manitoba

The homogeneous dielectric barrier discharge （DBD） in atmospheric air between two symmetric-columnar copper electrodes with epoxy plates as the dielectric barriers is generated using a us pulse high voltage power supply. The discharge characteristics are studied by measurement of its electrical discharge parameters and observation of its light emission phenom- ena, and the main discharge parameters of the homogenous DBD, such as discharge current and average discharge power, are calculated. Results show that the discharge generated is a homogeneous one with one larger single current pulse of about 2 #s duration appearing in each voltage pulse, and its light emission is radially homogeneous and covers the entire surface of the two elec- trodes. The influences of applied voltage amplitude, air gap distance and barrier thickness on the transition of discharge modes are studied. With the increase of air gap distance, the discharge will transit from homogeneous mode to filamentary mode. The higher the thickness of dielectric barriers, the larger the air gap distance for generating the homogeneous discharge mode. The average discharge power increases non-linearly with increasing applied voltage amplitude, and decreases non-linearly with the increase of air gap distance and barrier thickness. In order to generate stable and homogeneous DBD with high discharge power, thin barriers distance should be used, and higher applied voltage amplitude should be applied to small air gap.

关键词： dielectric barrier discharge (DBD) homogeneous mode filamentary mode discharge characteristics influencing factors

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Nicotinic acetylcholine signaling is required for motor learning but not for rehabilitation from spinal cord injury

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Neural Regeneration Research 2023年第2期18卷 364-367页

作者： Yue Li edmund R.Hollis II Burke Neurological Institute White PlainsNYUSA Feil Family Brain and Mind Research Institute Weill Cornell MedicineNew YorkNYUSA Current address:Department of Neuroscience University of Rochester Medical CenterRochesterNYUSA

Therapeutic intervention for spinal cord injury is limited,with many approaches relying on strengthening the remaining substrate and driving recovery through rehabilitative *** compared with learning novel compensatory strategies,rehabilitation focuses on resto ring movements lost to *** rehabilitation of previously learned movements after spinal cord injury requires the molecular mechanisms of motor learning,or if it engages previously trained motor circuits without requiring novel learning remains an open *** this study,mice we re randomly assigned to receive intrape ritoneal injection with the pan-nicotinic,non-competitive antagonist mecamylamine and the nicotinicα7 subunit selective antagonist methyllycaconitine citrate salt or vehicle(normal saline)prior to motor learning assays,then randomly reassigned after motor learning for rehabilitation study *** rvical spinal co rd dorsal column lesion was used as a model of in complete *** of this study showed that nicotinic acetylcholine signaling was required for motor learning of the single pellet-reaching task but it was dispensable for the rehabilitation of the same task after *** findings indicate that critical diffe rences exist between the molecular mechanisms supporting compensatory motor learning strategies and the restoration of behavior lost to spinal cord injury.

关键词： acetylcholine basal forebrain corticospinal tract dorsal column lesion mecamylamine methyllycaconitine motor control rehabilitation rotarod single pellet-reaching task

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DYNAMIC MODELLING OF BAR-GEAR MIXED MULTIBODY SYSTEMS USING A SPECIFIC FINITE ELEMENT METHOD

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Chinese Journal of Mechanical Engineering 1999年第2期12卷 12-18页

作者： Wang, Yong Cheung, Hongman edmund Zhang, Wenjun City Univ of Hong Kong Hong Kong Hong Kong

A new dynamic model for mixed, flexible bar and gear multibody systems is developed based on a specific finite element method, and a new gear element is proposed. The gear element can take into account the time variant stiffness, the gear errors and mass unbalance. The model for geared multibody systems can couple the gear meshing and the flexibility of all contained components. The kinematic and dynamic analyses of the geared multibody systems are expounded and illustrated on an example composed of three gears, two bars and one slider.

关键词： Gear Finite element Multibody system Simulation Dynamics

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An evaluation of a perfluoromethylcyclohexane(PMCH) permeation plug release vessel(PPRV) in a controlled turbulent environment

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International Journal of Mining Science and Technology 2015年第2期25卷 243-251页

作者： Jong edmund C. Luxbacher Kray D. Department of Mining and Minerals Engineering Virginia Tech

The use of sulfur hexafiuoride （SF6） as a tracer gas for analyzing underground mine ventilation systems has been practiced for over 30 years. As a result, the methods used to release, sample, and analyze SF6 are well accepted. As the complexity and size of underground mine ventilation networks increase, the ability of a SF6 to function as a convenient and rapid means of analysis diminishes. The utilization of multiple tracer gases can mitigate this by removing the need to purge the background presence of a tracer before conducting another release and allowing for a more comprehensive evaluation using multi-zone tech- niques. Recent studies have identified perfluoromethylcyclohexane （PMCH） as a possible supplement for SF6 in underground mine ventilation tracer studies. However, the deployment of PMCH remains a challenge because of this compounds physical properties. This paper evaluates a PMCH permeation plug release vessel （PPRV） under controlled turbulent conditions. The details of the experimental parameters used in the evaluation as well as a discussion regarding the performance of the PPRV are included.

关键词： Tracer gas Underground mines Mine ventilation Perfluoromethylcyclohexane

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Symptomatic male with subclinical varicocele found on ultrasound evaluation

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Asian Journal of Andrology 2016年第2期18卷 313-314页

作者： Ahmad Majzoub edmund Sabanegh Jr. Department of Urology Glickman Urological and Kidney Institute Cleveland Clinic Foundation CLeveland Ohio USA.

Scrotal pain is a commonly encountered complaint in urology practice. It occurs in around 2%-10% of patients with *** a relatively common association, the effect ofvaricocele on pain is much less investigated than its relation with infertility. Biggers and Soderdahl were the first to explore surgical treatment for pain attributed to a clinical varicocele in 1981, reporting an improvement rate of 48% after surgery.

关键词： @@

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Enhancement and validation of building integrated PV system:3D modelling,techno-economics and environmental assessment

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Energy and Built Environment 2022年第4期3卷 444-466页

作者： edmund Jin Wen Thoy Yun Ii Go School of Engineering and Physical Sciences Heriot-Watt University Malaysia.1Jalan Venna P5/2Precinct 562200 PutrajayaWilayah Persekutuan PutrajayaMalaysia

The incorporation of photovoltaic elements in buildings have been gaining more mileage in recent *** integrated photovoltaic(BIPV)technologies are on the rise in terms of efficiency and longevity,with a compound annual growth rate(CAGR)of 15.7%since *** costs of production and raw materials of BIPV have reached a level that is economically beneficial for building developers to adopt the ***,the lack of infras-tructure as compared to traditional means of energy production has impeded the maturing of such *** issue of conversion efficiency and module degradation have been addressed but not completely resolved by the scientific *** attractive governmental incentives such as net energy metering(NEM)and better returns of investments are shifting the tide as of late,what remains to be seen is the mass adoption of BIPV technology in residential and commercial *** work aims to develop an optimal layout for photo-voltaic panels in the university building precise 3D modelling and solar energy resource *** method adopted is based on energy production capability of a 3D modelled BIPV system which will be carried out in three *** are i)Assessment of geographical location and meteorological data,ii)Development of 3D model and orientation analytics and(iii)Development of optimal PV *** systems were considered for this study,which is the roof and two systems on the Southern Faç*** proposed rooftop BIPV design is expected to provide 49.27%of the building’s energy consumption while reducing CO_(2)emissions by 20155.32 tonnes throughout the lifespan of the system’s *** paper serves as a pioneering study on the feasibility of a BIPV system through the incorporation of building geometry for computations on incident solar *** the reduction of electricity imported from the grid,the adoption of the BIPV system also serves as an incremental step towards achi

关键词： Facade Energy yield Performance ratio Payback Building geometry

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Biodegradation of beet molasses vinasse by a mixed culture of micro organisms:Effect of aeration conditions and pH control

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Journal of Environmental Sciences 2011年第11期23卷 1823-1830页

作者： Krzysztof Lutoslawski Agnieszka Ryznar-Luty edmund Cibis Malgorzata Krzywonos Tadeusz Miskiewicz Department of Bioprocess Engineering Wroclaw University of EconomicsKomandorska 118/12053-345 WroclawPoland

The effect of aeration conditions and pH control on the progress and efficiency of beet molasses vinasse biodegradation was investigated during four batch processes at 38°C with the mixed microbial culture composed of Bifidobacterium,Lactobacillus,Lactococcus,Streptococcus,Bacillus,Rhodopseudomonas,and *** four processes were carried out in a shake flask with no pH control,an aerobic bioreactor without mixing with no pH control,and a stirred-tank reactor （STR） with aeration with and without pH control,*** experiments were started with an initial pH *** highest efficiency of biodegradation was achieved through the processes conducted in the STR,where betaine （an organic pollutant occurring in beet molasses in very large quantities） was completely degraded by the *** process with no pH control carried out in the STR produced the highest reduction in the following pollution measures：organic matter expressed as chemical oxygen demand determined by the dichromatic method ＋ theoretical COD of betaine （COD sum,85.5%）,total organic carbon （TOC,78.8%） and five-day biological oxygen demand （BOD 5,98.6%）.The process conditions applied in the shake flask experiments,as well as those used in the aerobic bioreactor without mixing,failed to provide complete betaine *** a consequence,reduction in COD sum,TOC and BOD 5 was approximately half that obtained with STR.

关键词： aerobic biodegradation batch process beet molasses vinasse mesophilic conditions mixed culture of microorganisms

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Characterization of time-and size-dependent particle emissions and decay from cooking oil fumes in residence:Impacts of various intervention measures

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Building Simulation 2023年第7期16卷 1149-1158页

作者： Jianbang Xiang Linmin Hu Jiayuan Hao Siqing Wu Jianping Cao edmund Seto School of Public Health(Shenzhen) Sun Yat-sen UniversityShenzhenGuangdong 518107China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Division of Environmental Health University of Southern CaliforniaLos AngelesCA 90032USA School of Medicine Sun Yat-sen UniversityShenzhenGuangdong 518107China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong 510006China Department of Environmental and Occupational Health Sciences University of WashingtonSeattleWA 98195USA

The dynamic characteristics of cooking-related particle size distributions in real-world settings are not fully *** a real-world campaign in a naturally-ventilated apartment in the northwest US,this study investigates the temporal profiles of size-resolved particle number concentrations(PNCs)ranging from 0.3 to 10µm from frying cooking *** cooking scenarios included various combinations of window ventilation,venting range hood(VRH)use,and portable air cleaner(PAC)*** a standardized pan-frying protocol throughout seven scenarios,real-time PNCs of 16-size bins were measured in the *** PNCs were empirically compared among size bins,periods,and *** most abundant size ranges of cooking-related particles were 0.3–0.579µm in number(45%–71%of the total)and 2.685–5.182µm in mass(48%–57%of the total).Compared with the scenario without any cooking-fume mitigating measures,keeping the kitchen windows open reduced the mean PNCs during and within 1-h after cooking for PM_(0.3-2.5),PM_(2.5-10),and PM_(0.3-10)by 78%,92%,and 79%,*** contrast,utilizing a VRH during cooking reduced the corresponding levels by 21%,69%,and 25%,*** with running the VRH,using a PAC in the kitchen led to additional reductions of 84%,88%,and 84%,***,the removal efficiencies of the three strategies generally increased with particle sizes.

关键词： cooking oil fumes size-resolved particles venting range hood window ventilation portable air cleaner

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Resolution enhancement of optical scanning holography with a spiral modulated point spread function

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Photonics Research 2016年第1期4卷 1-6页

作者： Ni Chen Zhenbo Ren Haiyan Ou edmund Y.Lam Department of Electrical and Electronic Engineering The University of Hong Kong Institute of Applied Physics University of Electronic Science and Technology of China

In optical scanning holography, one pupil produces a spherical wave and another produces a plane wave. They interfere with each other and result in a fringe pattern for scanning a three-dimensional object. The resolution of the hologram reconstruction is affected by the point spread function(PSF) of the optical system. In this paper, we modulate the PSF by a spiral phase plate, which significantly enhances the lateral and depth resolution. We explain the theory for such resolution enhancement and show simulation results to verify the efficacy of the approach.

关键词： PSF Resolution enhancement of optical scanning holography with a spiral modulated point spread function

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Proteomic signatures of infertile men with clinical varicocele and their validation studies reveal mitochondrial dysfunction leading to infertility

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Asian Journal of Andrology 2016年第2期18卷 282-291,J0007页

作者： Ashok Agarwal Rakesh Sharma Luna Samanta Damayanthi Durairajanayagam edmund Sabanegh American Center for Reproductive Medicine Cleveland Clinic Cleveland OH USA Department of Zoology School of Life Sciences Ravenshaw UniversityCuttack - 751 003 Odisha India Faculty of Medicine MARA University of Technology (UiTM) Selangor Darul Ehsan Malaysia Department of Urology Cleveland Clinic Cleveland OH USA.

To study the major differences in the distribution of spermatozoa proteins in infertile men with varicocele by comparative proteomics and validation of their level of expression. The study-specific estimates for each varicocele outcome were combined to identify the proteins involved in varicocele-associated infertility in men irrespective of stage and laterality of their clinical varicocele. Expression levels of 5 key proteins （PKARIA, AK7, CCT6B, HSPA2, and ODF2） involved in stress response and sperm function including molecular chaperones were validated by Western blotting. Ninety-nine proteins were differentially expressed in the varicocele Eroup. Over 87% of the DEP involved in major energy metabolism and key sperm functions were underexpressed in the varicocele group. Key protein functions affected in the varicocele group were spermatogenesis, sperm motility, and mitochondrial dysfunction, which were further validated by Western blotting, corroborating the proteomics analysis. Varicocele is essentially a state of energy deprivation, hypoxia, and hyperthermia due to impaired blood supply, which is corroborated by down-regulation of lipid metabolism, mitochondrial electron transport chain, and Krebs cycle enzymes. To corroborate the proteomic analysis, expression of the 5 identified proteins of interest was validated by Western blotting. This study contributes toward establishing a biomarker ＂fingerprint＂ to assess sperm quality on the basis of molecular parameters.

关键词： bioinformatics male infertility proteomics spermatozoa proteins varicocele

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