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开放教育研究 2001年第3期7卷 10-13页

作者： michael J osborne 阎光才拉卓比大学

网络时代信息通信技术的快速发展给大学带来了意想不到的深刻变革。本文从信息通信技术对大学地位、结构和功能的影响来进行分析 ,认为它本身并不会威胁到大学的功能 ,而是代表着教学与研究信息传递形式的一种创新。本文进而对未来大学... 详细信息

网络时代信息通信技术的快速发展给大学带来了意想不到的深刻变革。本文从信息通信技术对大学地位、结构和功能的影响来进行分析 ,认为它本身并不会威胁到大学的功能 ,而是代表着教学与研究信息传递形式的一种创新。本文进而对未来大学的本质属性。

关键词：网络时代 ICT 大学本质属性地位结构功能信息通信技术

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

Synthesis of 4-[F-18]Fluoro-4-Deoxy-N-Acetyl-1,3,6-Tri-O-Acetylglucosamine, a Potential Brain Imaging PET Agent

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Natural Science 2024年第3期16卷 19-23页

作者： Murthy Akula Derek Cressy Lee Collier George Kabalka Dustin osborne Department of Radiology The University of Tennessee Medical Center Knoxville USA Advion Biosciences Ithaca USA

The synthesis of a promising brain imaging agent 4-[F-18]fluoro-4-deoxy-N-acetyl-1,3,6-tri-O-acetylglucosamine, 2, was successfully accomplished from commercially available N-acetyl glucosamine in 5 steps. The non-decay corrected radiochemical yield and purity were found to be 31% ± 4% (n = 3) and >98% respectively. The total reaction time for radio labelling step was 50 min.

关键词： N-Acetylglucosamine Amyloidogenesis Lipase-Candida rugosa

THE NAVIER-STOKES EQUATIONS WITH THE KINEMATIC AND VORTICITY BOUNDARY CONDITIONS ON NON-FLAT BOUNDARIES

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Acta Mathematica Scientia 2009年第4期29卷 919-948页

作者： Dan osborne Mathematical Institute University of Oxford 24-29 St Giles

We study the initial-boundary value problem of the Navier-Stokes equations for incompressible fluids in a general domain in R^n with compact and smooth boundary, subject to the kinematic and vorticity boundary conditions on the non-flat boundary. We observe that, under the nonhomogeneous boundary conditions, the pressure p can be still recovered by solving the Neumann problem for the Poisson equation. Then we establish the well-posedness of the unsteady Stokes equations and employ the solution to reduce our initial-boundary value problem into an initial-boundary value problem with absolute boundary conditions. Based on this, we first establish the well-posedness for an appropriate local linearized problem with the absolute boundary conditions and the initial condition （without the incompressibility condition）, which establishes a velocity mapping. Then we develop apriori estimates for the velocity mapping, especially involving the Sobolev norm for the time-derivative of the mapping to deal with the complicated boundary conditions, which leads to the existence of the fixed point of the mapping and the existence of solutions to our initial-boundary value problem. Finally, we establish that, when the viscosity coefficient tends zero, the strong solutions of the initial-boundary value problem in R^n（n ≥ 3） with nonhomogeneous vorticity boundary condition converge in L^2 to the corresponding Euler equations satisfying the kinematic condition.

关键词： Navier-Stokes equations incompressible vorticity boundary condition kinematic boundary condition absolute boundary condition non-flat boundary general domain Stokes operator Neumann problem Poisson equation vorticity strong solutions inviscid limit slip boundary condition

Enhanced Lead Uptake by an Association of Plant and Earthworm Bioaugmented with Bacteria

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Pedosphere 2018年第2期28卷 311-322页

作者： anamika das jabez w.osborne Department of Biosciences Vellore Institute of Technology Vellore 632014 (India)

Lead(Pb) is recorded as the second most hazardous pollutant of the *** cases of Pb bioremediation has been reported using single biosystem,but very few reports are available in biological approaches using multi-biosystems to achieve an enhanced bioremoval of *** present study evaluated the capacity of a unique association of Pennisetum purpureum,a hyperaccumulator plant,and Lumbricus terrestris(earthworm)bioaugmented with a Pb-resistant bacterium,obtained from an industrially contaminated site and identified as isolate VITMVCJ1 Klebsiella variicola,to bioremediate *** Pb-resistant gene was amplified in the bacterial isolate *** study was conducted for 60 *** verified that the bioaugmentation process enhanced1)root and shoot length of the plants,2)chlorophyll content of the plants,and 3)biofilm-producing ability of the microbes from the rhizosphere region of the *** total phenolic and flavonoid contents were found to be lower in the plants in the bioaugmented *** study also observed a reduction in the toxic effects of Pb on earthworm and *** earthworm was used to assess the Pb-induced stress syndrome after exposure to sublethal concentrations of Pb in the soil.A reduction in the content of malondialdehyde,a potential biomarker,on exposure to Pb demonstrated the role of the inoculum to alleviate heavy metal-induced stress in *** three symbionts accumulated Pb;Pb was accumulated mainly in the root of the plant,and poorly in the shoot of the plant and body mass of the *** bioaugmentation system exhibited stable and excellent uptake of Pb from the contaminated *** results of the present study suggest the positive effect of the synergistic association of the plant and earthworm with appropriate microbes for the bioremoval of Pb.

关键词： bioaugmentation bioremediation heavy metal hyperaccumulator Klebsiella variicola Lumbricus terrestris malondi-aldehyde Pennisetum purpureum

The impact of Gunnera tinctoria(Molina)Mirbel invasions on soil seed bank communities

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Journal of Plant Ecology 2009年第3期2卷 153-167页

作者： Margherita Gioria Bruce osborne UCD School of Biology and Environmental Science University College DublinBelfieldDublin 4Ireland

Aims In recent years,there has been an increasing interest in the impact of invasive alien plant species on the soil seed *** seed banks play an important role in determining the composition and dynamics of the vegetation through ***,an ability to form a persistent seed bank and/or a capacity to alter the structure of the seed bank of invaded communities could be important factors in determining the success of many alien plant *** this study,we report on a detailed assessment of the characteristics of the seed bank community associated with the herbaceous plant invader,Gunnera tinctoria,a newly emerging and potentially globally significant invasive plant *** species,native to South America,is invasive in a range of wet habitats in Europe,Australasia and the *** A comprehensive assessment of the seed bank of invaded and comparable uninvaded areas was made at two points in time(May and October),at three sites in western *** seedling emergence approach was used to assess the structure(diversity,dominance and abundance)of the soil seed *** between invaded and uninvaded seed bank communities were investigated at the spatial scales of site,plot and *** Findings Gunnera tinctoria formed a large persistent seed bank at the study *** 30000 seedlings per square metre emerged from soils collected from invaded areas,of which 30%were found in deep soil *** of this invader represented 53–86%of the total number of seedlings associated with invaded *** the transient and the more persistent component of the seed bank of invaded communities were significantly less diverse and abundant than those of uninvaded areas,and were characterized by higher dominance,even when seedlings of the invader were not included in the *** seed bank of invaded areas was largely composed of seeds of agricultural weeds in addition to those of the *** results suggest that ***

关键词： invasive species soil seed bank diversity dominance Gunnera tinctoria

Linking, thinking & fixing:the story about the 2015 Chemistry Nobel Prize and the future of science

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Science Bulletin 2015年第23期60卷 2071-2076页

作者： Huan Meng Olivia J.osborne Department of Medicine University of California Los Angeles Centre for Environmental Implications of Nanotechnology University of California Los Angeles

Did you know there are roughly over 10,000 DNA damages in a cell per day?Do not be too alarmed though,thanks to various vital DNA repair mechanisms we are able to continue function normally as an organism and maintain our genome *** is no wonder then why this year prestigious Chemistry Nobel Prize(s)went to *** Lindahl,Aziz Sancar,and Paul Modrich for their

关键词：诺贝尔化学奖诺贝尔奖连接故事科学脱氧核糖核酸修复机制基因组

China’s transitioning class identity

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China Finance and Economic Review 2016年第1期5卷 71-87页

作者： Evan osborne Department of Economics Wright State University

China’s rapid economic transformation is similar in some ways to those that have occurred in other East Asian *** the changing structure of perceived class identity that occurs in many rapidly growing economies is found to be absent in China,and in fact as China has continued to grow such change as has occurred is found to be downward,despite the immense material improvement *** data on income distribution in China do not explain this phenomenon,but anomalies in China’s urban real-estate market might.

关键词： Housing market class identity middle class social effects of economic growth

Upsampling Monte Carlo neutron transport simulation tallies using a convolutional neural network

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Energy and AI 2023年第3期13卷 117-125页

作者： Andrew osborne Joffrey Dorville Paul Romano Nuclear Science&Engineering The Colorado School of Mines101214th St.GoldenCO80401United States of America Department of Mechanical Engineering The Colorado School of Mines1610 Illinois St.GoldenCO80401United States of America Argonne National Laboratory LemontILUnited States of America

The physical quantities calculated by nuclear reactor Monte Carlo simulations are typically recorded on a grid of two or three spatial dimensions and one dimension of neutron *** of this,increasing the resolution of the calculated quantities can have a significant impact on the memory and CPU time required to run a *** neural networks have been shown to accurately upsample coarse-resolution photo-graphic images to resolutions multiple times finer than the *** we show that a convolutional neural network can accurately upsample flux tallies in a Monte Carlo neutron transport simulation by a factor of two along the spatial and energy *** flux tallies in pressurized water reactor assemblies were calculated using OpenMC at a 64×64 pixel spatial resolution and 8 neutron energy groups for input to the neural *** network upsamples the low-resolution neutron flux to 128×128 pixel spatial resolution and 16 neutron energy ***-resolution neutron flux tallies and their uncertainties were also calculated with OpenMC and compared with the network’s *** upsampled data and the high-resolution tally results agree to within the statistical uncertainty calculated by OpenMC.

关键词： OpenMC Convolutional neural network Residual network Neutron Monte Carlo