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Efficacy in chickens of commercially inactivated Newcastle disease virus vaccines against recent Korean epizootic strain of NDV

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Efficacy in chickens of commercially inactivated Newcastle d...

The 15th World Veterinary Poultry Congress

作者： Woo-jin Jeon Eun-kyoung Lee Eun-im Yun Youn-jeong Lee Ok-mi Jeong Yong-joo Kim Jun-hun Kwon kang-seuk choi National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea National Veterinary Research ＆ Quarantine Service 480 Anyang-6AnyangGyeonggi 430-824Korea

＜正＞Introduction Newcastle disease（ND）is one of the most disastrous diseases in the poultry *** Korea, extensive vaccination against ND has been implemented,but outbreaks have not stopped ***, there are at least e...

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韩国传染性支气管炎分离株的遗传多样性

韩国传染性支气管炎分离株的遗传多样性

第15届世界禽病大会、中国畜牧兽医学会2007年学术年会

介绍：传染性支气管炎(IB)是一种鸡的急性、高度传染性疾病,以呼吸道症状、肾病、蛋鸡产蛋下降为特征。自从1986年第一次发现以来,IB 在韩国仍然呈地方流行性。目前使用 IBV 减毒活疫苗(H120株)或灭活

关键词：分离株传染性支气管炎

一株韩国新城疫近期流行株的分离——来自患有严重腹泻的发病猫头鹰体

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一株韩国新城疫近期流行株的分离——来自患有严重腹泻的发病猫头...

第15届世界禽病大会、中国畜牧兽医学会2007年学术年会

作者： Woo-Jin Jeon Eun-Kyoung Lee Jin-Ju Nah Young-Jun Kim Mu-Yeong Lee Hang Lee Jun-Hun Kwon kang-seuk choi 施蕾刘爵 National Veterinary Research & Quarantine Service Ministry of Agriculture and Forestry Anyang Korea National Veterinary Research & Quarantine Service Ministry of Agriculture and Forestry Anyang Korea National Veterinary Research & Quarantine Service Ministry of Agriculture and Forestry Anyang Korea Conservation Genome Resource Bank for Korean Wildlife(CGRB) College of Veterinary Medicine and BK21 Program for Veterinary Science Seoul National University Seoul Korea Conservation Genome Resource Bank for Korean Wildlife(CGRB) College of Veterinary Medicine and BK21 Program for Veterinary Science Seoul National University Seoul Korea Conservation Genome Resource Bank for Korean Wildlife(CGRB) College of Veterinary Medicine and BK21 Program for Veterinary Science Seoul National University Seoul Korea National Veterinary Research & Quarantine Service Ministry of Agriculture and Forestry Anyang Korea National Veterinary Research & Quarantine Service Ministry of Agriculture and Forestry Anyang Korea

新城疫病是家禽的一种高度接触性、全身感染的病毒性疾病。它的致病因子,新城疫病毒(NDV)至少存在8个不同的基因群,是指 NDV 单一血清型中从基因型Ⅰ到Ⅷ。在韩国最近(自2000年)分离的毒株

关键词：猫头鹰新城疫病毒韩国流行株分离

Evaluation of vibration and sound quality according to battery voltage change while moving a power seat in an automobile forward or backward

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Journal of Central South University 2014年第10期21卷 3844-3849页

作者： kang-seok Seo Doo-seuk choi Key-sun Kim Department of Mechanical Engineering Graduate School Kongju National University Division of Automotive and Mechanical Engineering Kongju National University

The changes in vibration, sound, and sound quality with changes in the driving voltage of a power seat motor from 12.5 to 14.5 V were measured and analyzed, which was used in real vehicles. BSR(buzz, squeak, rattle), which occurs for the power seat mechanism during sliding operation, was also evaluated. In addition, the results were expressed in terms of sound quality metrics, which measure the RPM change and sound level versus voltage to analyze their statistical correlation. Furthermore, vibration measurement and analysis were conducted simultaneously to determine the noisiest conditions and the source of the noise. The changes in RPM and voltage of a motor, in addition to vibration and noise, were measured at the same time to determine how noise, RPM, and voltage are interrelated.

关键词： seat vibration seat noise sound quality voltage buzz squeak and rattle(BSR)

CoolVox:Advanced 3D convolutional neural network models for predicting solar radiation on building facades

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Building Simulation 2022年第5期15卷 755-768页

作者： Jung Min Han Eun seuk choi Ali Malkawi Harvard University Graduate School of Design CambridgeUSA Harvard Center for Green Buildings and Cities CambridgeUSA Harvard John A.Paulson School of Engineering and Applied Sciences CambridgeUSA

Data-driven models have become increasingly prominent in the building,architecture,and construction *** area ideally suited to exploit this powerful new technology is building performance ***-based models have traditionally been used to estimate the energy flow,air movement,and heat balance of ***,physics-based models require many assumptions,significant computational power,and a considerable amount of time to output *** neural networks(ANNs)with prefabricated or simulated data are likely to be a more feasible option for environmental analysis conducted by designers during the early design *** ANNs require fewer inputs and shorter computation times and offer superior performance and potential for data augmentation,they have received increased attention for predicting the surface solar radiation on ***,ANNs can provide innovative and quick design solutions,enabling designers to receive instantaneous feedback on the effects of a proposed change to a building's *** research introduces deep learning methods as a means of simulating the annual radiation intensities and exposure level of buildings without the need for physics-based *** propose the CoolVox model to demonstrate the feasibility of using 3D convolutional neural networks to predict the surface radiation on building *** CoolVox model accurately predicted the radiation intensities of building facades under different boundary conditions and performed better than ARINet(with average mean square errors of 0.01 and 0.036,respectively)in predicting the radiation intensity both with(validation error=0.0165)and without(validation error=0.0066)the presence of boundary buildings.

关键词： artificial neural networks 3D convolutional neural networks solar radiation simulation building performance simulation

Dispersal patterns of exotic forest pests in South Korea

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Insect Science 2012年第5期19卷 535-548页

作者： Won II choi Young-seuk Park Division of Forest Disease and Insect Pests Korea Forest Research Institute Dongdaemun Seoul Department of Biology and The Korea Institute of Ornithology Kyung Hee University Dongdaemun Seoul Republic of Korea

Invasive species have potentially devastating effects on ecological communi- ties and ecosystems. To understand the invasion process of exotic forest pests in South Korea, we reviewed four major species of exotic forest pests： the pine needle gall midge （Thecodiplosis japonensis）, pine wilt disease caused by the pine wood nematode （Bur- saphelenchus xylophilus）, the fall webworm （Hyphantria cunea） and the black pine bast scale （Matsucoccus thunbergianae）. We consider their biology, ecology, invasion history, dispersal patterns and related traits, and management as exotic species. Among these species, the dispersal process of fall webworm was linear, showing a constant range expan- sion as a function of time, whereas the other three species showed biphasic patterns, rapidly increasing dispersal speed after slow dispersal at the early invasion stage. Moreover, human activities accelerated their expansion, suggesting that prevention of the artificial movement of damaged trees would be useful to slow expansion of exotic species. We believe that this information would be useful to establish management strategies for invasion species.

关键词： Bursaphelenchusxylophilus dispersal pattern exotic species fall webworm,forest management Hyphantria cunea Matsucoccus thunbergianae pine wilt disease,Thecodiplosis japonensis

Review on Fabrication Methods of in situ Metal Matrix Composites

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Journal of Materials Science & Technology 2000年第6期16卷 619-626页

作者： ChunXiang CUI Yutian SHEN Fanbin MENG seuk Bong kang School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Korea Institute of Machinery&Materials P.O.Box(Changwon)41Kyungsangnam-doKorea

This paper deals with a series of novel processing techniques based on the in situ production of metal matrix composites (MMCs). In situ techniques involve a chemical reaction resulting in the formation of a very fine and thermodynamically stable reinforcing ceramic phase within a metal matrix. As a result, this provides thermodynamic compatibility at the matrix-reinforcement interface. The reinforcement surfaces are also likely to be free of contamination and, therefore, a stronger matrix-dispersion bond can be achieved. Some of these technologies including DIMOX^? XD, PRIMEX^? reactive gas infiltration, high-temperature self-propagating synthesis (SHS), and liquid-solid, or solid-gas-liquid reactions as well as plasma in situ MMCs are expressed in this paper.

关键词： Powder metallurgy

Theory of phonon-modulated electron spin relaxation time based on the projection reduction method

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Chinese Physics B 2014年第8期23卷 436-443页

作者： Nam Lyong kang Sang Don choi Department of Applied Nanoscience Pusan National University Department of Physics Kyungpook National University

This paper introduces a new method for a formula for electron spin relaxation time of a system of electrons interacting with phonons through phonon-modulated spin-orbit coupling using the projection-reduction method. The phonon absorption and emission processes as well as the photon absorption and emission processes in all electron transition processes can be explained in an organized manner, and the result can be represented in a diagram that can provide intuition for the quantum dynamics of electrons in a solid. The temperature （T） dependence of electron spin relaxation times （T1） in silicon is T1 ∝ T-1.07 at low temperatures and T1 ∝ T-3.3 at high temperatures for acoustic deformation constant Pad = 1.4 × 10^7 eV and optical deformation constant Pod = 4.0 × 10^17 eV/m. This means that electrons are scattered by the acoustic deformation phonons at low temperatures and optical deformation phonons at high temperatures, respectively. The magnetic field （B） dependence of the relaxation times is T1 ∝ B-2.7 at 100 K and T1 ∝ B-2.3 at 150 K, which nearly agree with the result of Yafet, T1 ∝ B-3.0- B -2.5.

关键词： electron spin resonance spin-orbit coupling projection-reduction method phonon scattering

The Study on Effect of Exhaust Performance According to Active Muffler Valve Spring as Followed Spring Constant

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Journal of Thermal Science 2002年第4期11卷 372-377页

作者： seuk Cheun choi Tae Woo Kong Han Shik Chung Hyo Min Jeong Young Heung Chun Graduate School of Mechanical and Precision Engineering Gyeongsang National UniversityInpyeongdong 445 Tongyong Kyongnam 650-160Korea School of Transport Vehicle Engineering Gyeongsang National UniversityThe Institute of Marine IndustryInpyeongdong 445 Tongyong Kyongnam 650-160Korea

This study represents the influence on exhaust performance by active muffler valve *** main experimental parameters were engine speeds and torsion coil spring constants in the active *** the muffler valve spring has a low spring constant of k=0.75,the sound pressure level was low at the region of engine speed 2000 to 2500 r/min,and the velocity of exhaust gas was high at spring constant k=*** the engine speed was under 1500 r/min,the mean concentration of CO was high in case without muffler *** the engine speed in the range of 1600 to 2600 r/min with spring constant k=0.75,the mean HC concentration showed the lowest *** muffler valve,the temperature in the muffler was higher than the case with muffler *** research represented that the performance of the active muffler valve spring constant k=0.75 was higher than that without muffler valve and valve spring constant k=*** the three cases of experimental condition,with a spring constant k=0.75,0.70 and without muffler valve,the exhaust performance was high in case active muffler valve spring constant k=0.70.

关键词： active muffler torsion coil spring spring constant sound pressure level