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A wireless secret key generation method based on Chinese remainder theorem in FDD systems

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Science China(Information Sciences) 2012年第7期55卷 1605-1616页

作者： WANG WenJie 1,JIANG HongYan 1 ,XIA XiangGen 2,3 ,MU PengCheng 1 & YIN QinYe 1 1 Ministry of Education Key Lab for Intelligent Networks and Network Security,Xi’an Jiaotong university,Xi’an 710049,China 2 Electrical and Computer Engineering,university of Delaware,Newark,DE 19716,USA 3.chonbuk national university,jeonju,south korea Ministry of Education Key Lab for Intelligent Networks and Network Security Xi’an Jiaotong University Xi’an China Electrical and Computer Engineering University of Delaware Newark USA chonbuk national university Jeonju South Korea

The wireless physical channel parameters are recently used to provide secret ***,the key generation usually suffers from the quantization errors due to the noise,which decreases the key agreement ratio (KAR) between authorized *** existing approaches achieve high KAR by discarding some channel parameters which may lower the key generation efficiency and therefore lower the encryption *** the frequency-division duplex (FDD) systems,the number of reciprocal parameters,such as the multipath angle and delay,is *** how to find a quantization method with high KAR and encryption strength is one of the major problems for secret key generation in FDD *** this paper,a robust quantization scheme based on grouping and shifting is proposed,in which all the available parameters are used for key *** addition,a key mapping method with error correction based on Chinese remainder theorem (CRT) is proposed to further improve the KAR *** demonstrate the effectiveness of the proposed method.

关键词： wireless communication security secret key generation FDD CRT angle and delay estimation

Middle Cambrian (Upper Series 3)Protoconodonts and Paraconodonts from the Machari Formation at Eodungol Section,Yeongwol,korea

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Journal of Earth Science 2013年第2期24卷 157-169页

作者： Byung-Su Lee Department of Earth Science Education Chonbuk National University

The Machari Formation ranges from the ＂upper Series 3＂（Middle Cambrian） to Furongian （Upper Cambrian） in the Yeongwol area, korea. It has been known to yield relatively diverse invertebrate fossils. Particularly, the trilobite biozones of the formation have been well defined. On the other hand, little has hitherto been studied on conodont microfossils for the formation. This paper reports a diverse and well-preserved protoconodonts and paraconodonts of Series 3 from the formation in the Eodungol Section, exposed along a southern mountain trail of Mt. Sambangsan, Yeongwol, korea. Five of the 13 samples collected for conodont contain a rich protoconodont and paraconodont assemblage and numerous shelly fossils including trilobites, brachiopods, sponge spicules, hyolithids, and incertae sedis. Sample Eo 5 is extremely fossiliferous （465 elements, 96.5% of total collection）, and the most abundant species was Phakelodus elongatus （236 elements, 62% of the Eo 5 collection）. The preservation is relatively good, but some specimens are corroded and fragmentary. Some of the protoconodonts are exfoliated. Relatively larger ones were commonly preserved as phosphatized internal molds, particularly in specimens of Furnishina bigeminata, Furnishina leei n. sp., Muellerodus pomeranensis, Nogamiconus sinensis, and westergaardodids. Phakelodids were commonly preserved as clusters. Among 20 species referable to nine genera, Furnishina bigeminata, Furnishina leei n. sp., Nogamiconus sinensis, Huayuanodontus tricornis, Proscandodus obliquus, and Westergaardodina grandidens were previously undescribed species in korea. This assemblage is named herein as the Westergaardodina matsushitai Zone, which is a new biozonal name replacing the old one, i.e., Gapparodus bisulcatus-Westergaardodina matsushitai-Westergaardodina moessebergensis Assemblage. The W. matsushitai Zone corresponds to the Lejopyge armata trilobite Zone and is well correlated with the upper Series 3 conodont biozones of the W

关键词： conodonts biostratigraphy Series 3 and Furongian Machari Formation korea.

Quasimolecular Dynamic Simulation for Bending Fracture of Laminar Composite Materials

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Journal of Materials Science & Technology 2001年第5期17卷 547-552页

作者： Youngsuk Kim and Youngmoon Lee Department of Mechanical Engineering, Kyungpook national university, Taegu, south korea Dongyoul Choi and Chanil Kim Graduate School, Kyungpook national university, Taegu, south korea Dept. of Mech. Eng. Kyungpook Natl. Univ. Taegu South Korea

Recently, quasimolecular dynamics has been successfully used to simulate the deformation characteristics of actual size solid materials. In quasimolecular dynamics, which is an attempt to bridge the gap between atomistic and continuum simulations, molecules are aggregated into large units, called quasimolecules, to evaluate large scale material behavior. In this paper, a 2-dimensional numerical simulation using quasimolecular dynamics was performed to investigate laminar composite material fractures and crack propagation behavior in the uniform bending of laminar composite materials. It was verified that under bending deformation laminar composite materials deform quite differently from homogeneous materials

关键词： Quasimolecular Dynamic Simulation for Bending Fracture of Laminar Composite Materials Simulation

EFFECTS　OF　TEMPERATURE　ON　DISTRIBUTION　BEHAVIORS　OF　MINOR　ELEMENTS　IN　COPPER　FLASH　SMELTING──COMPUTER　SIMULATION

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中国有色金属学会会刊：英文版 1996年第4期6卷 38-41页

作者： Tan Pengfu Zhang Chuanfu(Department of Nonferrous Metallurgy,Central south university of Technology,Changsha 410083) Tong Rae Cho(Department of Metallurgical Engineering,Chungnam national university,south korea) Department of Nonferrous Metallurgy Central South University of Technology Changsha 410083 China Department of Metallurgical Engineering Chungnam National University South Korea

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关键词： As Sb Bi Pb Zn simulation computer model thermodynamics

Three-Dimensional Rigid-Plastic FEM Simulation of Bulk Forming Processes with New Contact and Remeshing Techniques

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Journal of Materials Science & Technology 2001年第3期17卷 329-332页

作者： Debin Shan and Youngsuk Kim School of Mechanical Engineering, Kyungpook national university, Taegu 702-70 1, south korea Hyunsoo Kim Graduate School of Mechanical Engineering, Kyungpook national university, Taegu 702-701, south korea E-mail: shandb@public Sch. of Mech. Eng. Kyungpook Natl. Univ. Taegu 702-701 South Korea

Some techniques such as die surface description, contact judgement algorithm and remeshing are proposed to improve the robustness of the numerical solution. Based on these techniques, a three-dimensional rigid-plastic FEM code has been developed. Isothermal forging process of a cylindrical housing has been simulated. The simulation results show that the given techniques and the FEM code are reasonable and feasible for three-dimensional bulk forming processes.

关键词： Three-Dimensional Rigid-Plastic FEM Simulation of Bulk Forming Processes with New Contact and Remeshing Techniques FEM Simulation

Calculations of Forming Limit Diagrams for Changing Strain Paths on the Formability of Sheet Metal

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Journal of Materials Science & Technology 2001年第1期17卷 141-142页

作者： Hyunsung Sou Graduate School of Mechanical Eng., Kyungpook national university, korea Youngsuk Kim Dept. of Mechanical Eng., Kyungpook national university, korea Graduate Sch. of Mech. Eng. Kyungpook Natl. Univ. Kyungpook South Korea

In the press shop of most sheet metals, sheet material undergoes complex strain path and also the formability of the sheet material was limited by the stretchability of the material. Therefore, the precise prediction of path-dependent FLD based on M-K approach using generalization of Hill's 1979 anisotropic yield criterion and introducing a strain gradient effect in the constitutive equation. Also, the theoretically obtained FLD will be compared with experimental data for steel sheets.

关键词： Sheet Metal sheet material strain gradient effect constitutive equation experimental data yield criterion steel sheets strain path

Numerical Study of the Effects of the Face Velocity onCeramic Filter

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Journal of Thermal Science 1998年第4期7卷 226-230页

作者： Seo, Taewon(School of Mechanical Engineering, Andong national university, 388 Songchun-Dong, Andong,760-749, south korea) School of Mechanical Engineering Andong National University Andong South Korea

Time-averaged explicit Navier-Stokes equations with the modified Darcy’s law for the threedimensional cylindrical flow field were formulated to the problem. Numerical investigation of the effects of the face velocity on ceramic candle filter was executed in three-dimensional turbulent flow field. It is found that the flow in the vessel is pushed toward the filter region by the pressure difference between inside and outside of the filter due to the viscosity and inertial resistance. It is also found that the pressure drop is directly proportional to the flow rate and the slope of the pressure drop will be mitigated when the thickness of the filter cake (8) is larger than 10 mm.

关键词： 3D turbulent flowfield N-S equations with Darcy's law

Induction of murine interleukin-1 beta expression by water-soluble components from Hericium erinaceum

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Acta Pharmacologica Sinica 2006年第8期27卷 1058-1064页

作者： Chang-gue SON~2 Jang-woo SHIN~2 Jung-hyo CHO~2 Chong-kwan CHO~2 Cheol-heui YUN~3 Seung-hyun HAN~(4,5,6) ~2East-West Cancer Center,Dunsan Oriental Hospital of Daejon university,Daejon,301-724,Republic of korea ~3School of Agricultural Biotechnology,Seoul national university,Seoul 151-742,korea ~4Department of Oromaxillofacial Infection and Immunity and Dental Research Institute,School of Dentistry,Seoul national university.Seoul 110-749,korea ~5Laboratory Sciences Division,International Vaccine Institute.Seoul 151-818.korea East-West Cancer Center Dunsan Oriental Hospital of Daejon University Daejon Republic of Korea School of Agricultural Biotechnology Seoul National University Seoul Korea Department of Oromaxillofacial Infection and Immunity and Dental Research Institute School of Dentistry Seoul National University Seoul Korea Laboratory Sciences Division International Vaccine Institute Seoul Korea

Aim:To investigate the inductive effect of water extract from Hericium erinaceum(WEHE)on interleukin-1β(IL-1β)***:A murine macrophagecell-line,RAW 264.7 was stimulated with 1 to 10 mg/L WEHE and inductions of IL-1β protein and its steady state mRNA were examined using a bioassay,Westernblotting,and reverse transcription-polymerase chain reaction(RT-PCR)*** inductive effect of WEHE on IL-1β gene expression was further investigatedby a chloramphenicol acetyltransferase(CAT)reporter gene assay using a tran-sient transfection with pIL-1(870 bp)-CAT where the expression of the CAT genewas regulated by a IL-1β *** electrophoretic mobility shift assay(EMSA)was also performed to examine transcription factors,nuclear factor-kappa B(NF-kB),activator protein 1(AP-1),nuclear factor interleukin-6(NF-IL6),and cAMPresponse element(CRE)/activating transcription factor(ATF).Results:WEHEinduced IL-1β production in both its mRNA and protein expression in a dose-dependent *** inductive effect of WEHE on IL-1β gene expression wasdue to the augmentation of the IL- 1β ***,EMSA showedthat WEHE markedly increased the binding activities of NF-kB,and to a lesserextent,those of AP-1 and NF-IL6 to their cognate DNA recognition sites,whereasCRE/ATF binding remained constant,all of which are known to be involved in theregulation of IL-1β gene ***:WEHE induces IL-1β expres-sion in macrophages at a transcriptional level by enhancing the activation oftranscription factors,NF-kB,NF-IL6,and AP-1.

关键词： Hericium erinaceum interleukin-1 lipopolysaccharide

Relationship between atrial natriuretic peptide-immunoreactive cells and microvessels in rat gastric mucosa

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Acta Pharmacologica Sinica 2006年第2期27卷 205-211页

作者： Chun-hui LI~(2,3) Zong-wei YANG~3 Zheng-ri YIN~3 Zheng JIN~3 De-gang XING~3 Lian-hua PIAO~3 Yong-chul KIM~4 Wen-xie XU~(2,5) ~2College of Life Science and Biotechnology.Shanghai Jiaotong university,Shanghai 200240,China:~3Department of Physiology.Yanbian university College of Medicine.Yanji 133000.China ~4Department of Physiology,Chungbuk national university,College of Medicine.Cheongju.Chungbuk 361-763,korea College of Life Science and Biotechnology Shanghai Jiaotong University Shanghai China Department of Physiology Yanbian University College of Medicine Yanji China Department of Physiology Chungbuk National University College of Medicine Cheongju Korea

Aim:To investigate the ultrastructural localization of atrial natriuretic peptide(ANP)-synthesizing cells and the relationship between ANP-synthesizing cellsand microvessels in rat gastric ***:Immunohistochemistry tech-niques and postembedding immunoelectron microscopy techniques were used tovalidate the findings regarding the expression of ANP-synthesizing cells and theultrastructural localization of ANP-synthesizing cells in the gastric ***-tochemistry techniques and the tannic acid-ferric chloride method(TA-Fe stain-ing method)were used to reveal microvessel density and the distribution of ANP-synthesizing cells in different regions of the ***:Cells expressingANP were localized and ANP-synthesizing cells were identified as enterochroma-ffin(EC)cells in the gastric ***-synthesizing cells existed in differentregions of the *** percentage ANP-synthesizing cells in the mucosawas greatest in the fundus(46.7%e5.3%),intermediate in the antrum(40.1%±4.5%),and least in the body(21.6%±3.6%).There was a positive relationshipbetween the percentage of ANP-synthesizing cells and the density of microvesselsin the antral mucosa,but not in the fundus or body ***:ANP issynthesized by EC cells in rat gastric mucosa,and ANP-synthesizing cells aremost dense in the gastric *** may act not only as a regional autocrineand/or paracrine regulator,but also as an endocrine regulatory peptide in thegastrointestinal tract.

关键词： atrial natriuretic factor enterochromaffin cells blood vessels gastric mucosa