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TT virus and hepatitis G virus infections in Korean blood donors and patients with chronic liver disease

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World Journal of Gastroenterology 2003年第4期9卷 741-744页

作者： Mee Juhng Jeon Jong Hee Shin Soon Pal suh young Chai Lim Dong Wook Ryang Division of Medical Research Kwangju-Chonnan Red Cross Blood CenterChonnam National UniversityKwangju Republic of Korea Department of Clinical Pathology Chonnam National UniversityKwangju Republic of Korea Research Institute of Medical SciencesChonnam Nationa UniversityKwangjuRepublic of Korea Department of Pharmacology Medical SchoolChonnam National UniversityKwangjuRepublic of Korea Research Institute of Medical SciencesChonnam National UniversityKwangjuRepublic of Korea Department of Clinical Pathology Chonnam National UniversityKwangjuRepublic of Korea Research Institute of Medical Scienceschonnam National UniversityKwangjuRepublic of Korea

AIM:To determine the prevalences of TTV and HGV infections among blood donors and patients with chronic liver disease in Korea,to investigate the association of TTV and HGV infections with blood transfusion,and to assess the correlation between TTV and HGV viremia and hepatic damage. METHODS:A total of 391 serum samples were examined in this *** were obtained from healthy blood donors(n=110),hepatitis B surface antigen(HBsAg)-positive donors(n=112),anti-hepatitis C virus(anti-HCV)-positive donors(n=69),patients with type B chronic liver disease (n=81),and patients with type C chronic liver disease(n=19). Trv DNA was detected using the hemi-nested *** RNA was tested using RT-PCR.A history of blood transfusion and serum levels of alanine aminotransferase(ALT)and aspartate aminotransferase(AST)were also determined. RESULTS:TTV DNA was detected in 8.2%of healthy blood donors,16.1%of HBsAg-positive donors,20.3%of anti- HCV-positive donors,21.0%of patients with type B chronic liver disease,and 21.1%of patients with type C chronic liver *** RNA was detected in 1.8%of healthy blood donors,1.8%of HBsAg-positive donors,17.4%of anti-HCV-positive donors,13.6%of patients with type B chronic liver disease,and 10.5%of patients with type C chronic liver *** prevalence of TTV and HGV infections in HBV- or HCV-positive donors and patients was significantly higher than in healthy blood donors(P<0.05), except for the detection rate of HGV in HBsAg-positive donors which was the same as for healthy *** was a history of transfusion in 66.7%of TTV DNA-positive patients and 76.9%of HGV RNA-positive patients(P<0.05).No significant increase in serum ALT and AST was detected in the TTV or HGV-positive donors and patients. CONCLUSION:TTV and HGV infections are more frequently found in donors and patients infected with HBV or HCV than in healthy blood ***,there is no significant association between TTV or HGV infections and liver injury.

关键词： Blood Donors Blood Transfusion Chronic Disease DNA Virus Infections DNA, Viral Flaviviridae Infections GB virus C purification Hepatitis B Surface Antigens Hepatitis, Viral, Human Korea Liver Diseases Polymerase Chain Reaction Reference Values Reverse Transcriptase Polymerase Chain Reaction Torque teno virus

Influence of potassium pyrophosphate in electrolyte on coated layer of AZ91 Mg alloy formed by plasma electrolytic oxidation

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中国有色金属学会会刊：英文版 2009年第4期19卷 824-828页

作者： jin-young CHO Duck-young HWANG Dong-H eon LEE Bongyoung YOO Dong-Hyuk SHIN Department of Metallurgy and Materials Scienc e Hanyang University

The effect of potassium pyrophosphate in the electrolyte on plasma electrolytic oxidation(PEO) process for AZ91 Mg alloy was *** morphologies and chemical compositions of the coating layer on the AZ91 Mg alloy were evaluated and corrosion resistance was also estimated by potentiodynamic polarization *** coating layer on AZ91 Mg alloy coated from the Bath 2 containing 0.03 mol/L of potassium pyrophosphate for 360 s exhibited considerably dense structure and contained 11%-18%(mass fraction) of *** higher content of phosphorous of coating layer coated from Bath 2 could be detected at the bottom of oxide layer,which strongly implied that the phosphorous ion might be concentrated at the barrier *** potential of coating layer of AZ91 Mg alloy increased and corrosion current density decreased with increasing the concentration of potassium *** polarization resistance(Rp) of coating layer of AZ91 Mg alloy coated from Bath 2 was 4.65×107 Ω/cm2,which was higher than that(Rp=3.56×104 Ω/cm2) of the sample coated from electrolyte without potassium *** coating layer coated from Bath 2 containing 0.03 mol/L potassium pyrophosphate exhibited the best corrosion resistance.

关键词： AZ91镁合金合金涂层焦磷酸钾电解氧化等离子体电解质腐蚀电流密度耐腐蚀性

Authentication masking code against DoS of T-MAC protocol

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Journal of Central South University 2013年第7期20卷 1889-1895页

作者： SON young-ho HONG jin-keun BAE Keun-sung Attached Institute of ETRI Division of Information & Communication Baekseok University School of Electrical Engineering & Computer Science Kyungpook National University

Security vulnerability of denial of service (DoS) in time out-medium access control (T-MAC) protocol was discussed and analysis of power consumption at each stage of T-MAC protocol was carried out. For power efficient authentication scheme which can provide reliability, efficiency, and security for a general T-MAC communication, a novel synchronization and authentication scheme using authentication masking code was proposed. Authentication data were repeated and masked by PN sequence. The simulation results show that the proposed approach can provide synchronization and authentication simultaneously for nodes in wireless sensor network (WSN). 63 bits AMC code gives above 99.97% synchronization detection and 93.98% authentication data detection probability in BER 0.031 7.

关键词： time out-medium access control (T-MAC) security vulnerability authentication synchronization authenticationmasking code

Lightweight design of 45000r/min spindle using full factorial design and extreme vertices design methods

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Journal of Central South University 2011年第1期18卷 153-158页

作者： PARK Seong-jin LEE Choon-man HWANG young-kug Department of Mechanical Design and Manufacturing Engineering Changwon National University

Factors for determining the spindle size are the shaft diameter, positions of bearing and motor, and entire length of the spindle. Then, it is important to find the assembling of the optimal design variables, which satisfy the stiffimss and rotational speed required to the spindle. A general full factorial design method was used to verify some factors that affect the natural frequency of a spindle. It is verified that the shorter shaft length and bearing span length represent the higher natural frequency, and there are some effects according to the change in the levels of factors. The detailed spindle dimension is determined by applying an EVD method, which can define the optimal bearing position through considering the limiting condition. Based on the estimated regression model, the optimal spindle size and bearing distance that can improve the primary natural frequency are obtained, and the influence of design factors on the natural frequency is also analyzed.

关键词： high-speed spindle extreme vertices design natural frequency lightweight design full factorial design

A study on the interference effects for tidal current power rotors

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Science China(Technological Sciences) 2010年第11期53卷 3094-3101页

作者： Chul-Hee JO Kang-Hee LEE jin-young YIM Department of Naval Architecture & Ocean Engineering Inha University

Due to global warming, the need to secure an alternative resource has become more important nationally. With the high tidal range of up to 9.7 m on the west coast of Korea, numerous tidal current projects are being planned and constructed. To extract a significant quantity of power, a tidal current farm with a multi-arrangement is necessary in the ocean. The rotor, which initially converts the energy, is a very important component because it affects the efficiency of the entire system, and its performance is determined by various design variables. The power generation is strongly dependent on the size of the rotor and the incoming flow velocity. However, the interactions between devices also contribute significantly to the total power capacity. Therefore, rotor performance considering the interaction problems needs to be investigated for generating maximum power in a specific field. This paper documents a performance study of devices considering the interference between rotating rotors with axial, transverse and diagonal arrangements.

关键词： TCP (tidal current power) renewable energy interference effect rotor CWC (circulation water channel) CFD (computational fluid dynamics)

Growth and Magnetic Properties of Sol-Gel Derived Co-Doped ZnO Thin Film

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Journal of Rare Earths 2006年第Z1期24卷 59-63页

作者： young Sung Kim Ki Chul Kim Won Pil Tae Dae Ho Yoon Tae Seok Park Su Jeong suh Advanced Material Process of Information Technology Sungkyunkwan University Suwon 440-746 Korea Cambridge-ETRI Joint R&D Centre Electronics and Telecommunications Research Institute Daejeon 305-350 Korea Ulsan Industry Promotion Techno Park Ulsan 683-804 Korea Advanced Material Process of Information Technology Sungkyunkwan University Suwon 440-746 Korea Advanced Material Process of Information Technology Sungkyunkwan University Suwon 440-746 Korea Advanced Material Process of Information Technology Sungkyunkwan University Suwon 440-746 Korea

Zn1-xCoxO films were grown on glass by sol-gel spin coating process. A homogeneous and stable Zn1-xCoxO sol was prepared by dissolving zinc acetate dihydrate, cobalt acetate tetrahydrate and aluminium chloride hexahydrate as solutes in solution of isopropanol and monoethanolamine. The films were postheated and vacuum annealed, and investigated for c-axis preferred orientation and electromagnetic properties. Zn1-xCoxO films with different Co concentrations were oriented well along the c-axis, especially the Zn1-xCoxO film with 10% Co(atom fraction) was highly c-axis oriented. The transmittance spectra show that Zn1-xCoxO films occur d-d transition and sp-d exchange interaction between Co2+ ions. The electrical resistivity of the films at 10% Co had the lowest value because the crystallite size became largest and the crystallinity of the c-axis was improved. X-ray photoelectron spectroscopy and alternating gradient magnetometer analyses indicated that no Co metal cluster was formed, and the ferromagnetism at room temperature appeared. The characteristics of the electrical resistivity and room temperature ferromagnetism of sol-gel derived Zn1-xCoxO films suggest a potential application of dilute magnetic semiconductor devices.

关键词： sol-gel Zn1-xCoxO thin film dilute magnetic semiconductor (DMS)

Nucleus-Encoded Thylakoid Protein,OsY3IP1,Confers Enhanced Tolerance to Saline and Alkaline Stresses in Rice

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Rice science 2022年第3期29卷 225-236页

作者： Hyeran MOON young-Ah KIM Ryoung SHIN Chang-jin PARK Department of Molecular Biology Sejong University Department of Bioresources Engineering Sejong University RIKEN Center for Sustainable Resource Science Plant Engineering Research Institute Sejong University

Abiotic stress confers serious damage to the photosynthetic machinery,often resulting in plant growth *** chloroplast open reading frame 3(Ycf3)-interacting protein 1(Y3IP1)is a nucleus-encoded thylakoid protein and plays an essential role in the assembly of photosystem *** full-length cDNA over-expresser(FOX)gene-hunting system is an approach using systemically generated gain-of-function *** the FOX-rice lines,a line CE175 overexpressing rice Y3IP1gene(Os Y3IP1)displayed less inhibition of root growth under saline(NaCl)*** expression of Os Y3IP1 was up-regulated under saline and alkaline(Na2CO3)stresses in the rice variety *** saline and alkaline treatments,transgenic Kitaake overexpressing OsY3IP1-GFP(OsY3IP1-GFPox/Kit)displayed higher levels of chlorophyll content compared to *** the stress conditions,the maximum quantum yield of photosystem II photochemistry levels was higher in OsY3IP1-GFPox/Kit than in *** increased tolerance conferred by OsY3IP1 overexpression correlated with reduced reactive oxygen species *** data provide new insights into the possible role of OsY3IP1 in the pathway suppressing photooxidative damage under stress *** features can be further exploited to improve saline and alkaline tolerances of rice plants in future.

关键词： alkaline reactive oxygen species rice saline stress tolerance

Measles outbreaks in the Kyeongin area of the Republic of Korea,2013-2014:A single-center experience in a country of measles elimination

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Asian Pacific Journal of Tropical Medicine 2017年第1期10卷 67-72页

作者： Sun Hyoung Park Dong Hun Lee Jang Yong jin young-Lim Shin Meeyong Shin Sung Shin Kim Won Suk suh Jae Ock Park Yong Hee Hong Department of Pediatrics College of MedicineSoonchunhyang UniversityBucheon HospitalBucheonRepublic of Korea

Objective: To identify the source of infection and determine the clinical features and laboratory finding of measles infection,Methods: In 27 measles patients,except for 3 adult patients,the rest of 24 pediatric measles cases were analyzed with regard to age,sex,immunization status,transmission routes and molecular genotyping of measles virus,Eighteen measles patients who admitted in isolation ward were set apart to investigate clinical findings and its correlation with laboratory characteristics,Retrospective analysis of cases was conducted in this study,Results: Of the 24 pediatric patients,23(95.8%) had not received any measles-containing vaccine(MCV),Sixteen of the patients(66.7%) were aged young age from 9 months to 12 months should be considered in situations of early exposure,Furthermore there is a call for consideration of scheduling an earlier age for the first dose of MMR vaccine in Europe,It is necessary for Korea to investigat

关键词： Measles Disease outbreaks Pediatrics

A New young Wall Realization of B(λ) and B(∞)

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Algebra Colloquium 2023年第3期30卷 503-540页

作者： Zhaobing Fan Shaolong Han Seok-jin Kang young Rock Kim Harbin Engineering University Harbin 150001China Korea Research Institute of Arts and Mathematics Asan-siChungcheongnam-do31551Korea Graduate School of Education Hankuk University of Foreign StudiesSeoul 02450Korea

Using new combinatorics of young walls,we give a new construction of the arbitrary level highest weight crystal B(λ)for the quantum affine algebras of types A^((2))_(2n),D^((2))_(n+1),A^((2))_(2n−1),D^((1))_(n),B^((1))_(n) and C^((1))_(n).We show that the crystal consisting of reduced young walls is isomorphic to the crystal B(λ).Moreover,we provide a new realization of the crystal B(∞)in terms of reduced virtual young walls and reduced extended young walls.

关键词： quantum affine algebra crystal basis highest weight crystal young wall