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Lipoprotein-associated Phospholipase A2, as a Noble Indicator for Metabolic Syndrome in Korean Men
Sung Ha Park,Oh Yoen Kim,Mi Jin Jang,Soo Jeong Koh,Yae Jung Hyun,Hyun Yang Yeo,Jung Sun Kim,Hwang Hye Jin,Tae Sook Jeong,Yang Soo Jang,Jong Ho Lee 한국지질동맥경화학회(구 한국지질학회) 2007 한국지질동맥경화학회 추계학술발표논문집 Vol.2007 No.-
Yeo-Chun Yun,Kyung-Sub Lee,Sang-Woo Kim,Sung-Soo Kim 한국자기학회 2007 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-
For the aim of thin electromagnetic wave absorbers used in quasi-microwave frequency band, this study proposes the high-permeability magnetic composite sheets of quarter wavelength thickness (λ/4 spacer) coated with resistive film of 377 Ω/sq (impedance transformer). For the λ/4 spacer, flexible magnetic composite sheets of Fe??Si9.5Al5.5flake particles aligned in rubber matrix are prepared by conventional magnetic composite fabrication technique. Due to high permeability and high permittivity of the composite sheets, λ/4 thickness can be reduced as low as 0.5 ㎜ in 2 ㎓. The microwave absorbance (determined at 2 ㎓) of the magnetic composite sheets are found to be -4.6 ㏈ (65% power absorption) at a λ/4 thickness of 0.5 ㎜. By coating the conductive paste (graphite and carbon black dispersed in polymer resin matrix) on the λ/4 spacer (thickness = 0.5㎜), the microwave absorbance is greatly improved. When the sheet resistance of coated films is close to 377 Ω/sq, the reflection loss is reduced to -11 ㏈ (90% power absorption). This is attributed to the wave impedance matching led by the resistive film of free-space impedance combined with a λ/4 thickness of high-permeability magnetic spacer. It is, therefore, proposed that the resistive film/magnetic composite structure with controlled electrical properties and thickness can be useful as thin microwave absorbers used in quasi-microwave frequency band.
Analysis on the error performance objectives for turbo codes in the DVB-RCS system
Yeo, Sung-Moon,Kim, Soo-Young 통신위성우주산업연구회 2006 Joint Conference on Satellite Communications Vol.2006 No.-
디지털 위성 통신 시스템은 다양한 서비스를 제공하기 위하여 지상망과 통합되어 사용되는 경우가 않다. 이 경우에 위성 통신 시스템은 지상망에서 정의한 성능 목표를 만족시켜야 한다. ITU-R 권고서 S.1062에서는 15 GHz 이하의 디지털 위성 통신 시스템의 오류 성능 목표를 명시하고 있다. 권고서에서는 비트오류 확률 나누기 오류 버스트 내의 평균 오류의 개수로써 오류 성능 목표를 제시하고 있다. 본 논문에서는 이러한 오류 성능 목표를 분석하는데 있어서 오류 버스트 내의 평균 오류 개수인 $alpha 값을 이론적으로 구하는 방법을 제시한다. 이를 토대로 길쌈 부호의 이론 값 및 이에 바탕을 두고 있는 DVB-RCS 터보부호의$alpha값에 대한 이론 값을 구하고 시뮬레이션 값과 비교하여 $alpha 의 이론적인 계산식을 증명해 보일것이다. Digital satellite communication systems are usually integrated with terrestrial systems to provide various services. In these cases they should satisfy the performance objectives defined by the terrestrial systems. Recommendation ITU-RS.1062 specifies the error performance objectives of digital satellite communication systems operating below 15 GHz. The error performance objectives are given in terms of bit error probability divided by the number of the average bit errors in the burst ($alpha). This paper presents a theoretical method to estimate $alpha that is a very important parameter in the satellite communication systems to analyze the error performance objectives. We show performance estimation results of DVB-RCS turbo code using the presented method, and verify them by comparing to the simulation results.
( Soo Rim Kim ),( Su Yeon Park ),( Yeo Jung Moon ),( Sei Kwang Kim ),( Sang Wook Bai ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-
Homeobox (HOX) genes are transcriptional regulators that orchestrate embryonic development. The HOXA 11 gene controls to the development of the lower uterine cervix and vagina. The HOXA13 gene is also responsible for the development of the vagina and regulates extracellular matrix constituents. We hypothesized that expressions of HOXA 11 in uterosacral ligaments (USLs) and HOXA13 in vagina may be decreased in women with Stress Urinary incontinence (SUI) and/or pelvic organ prolapse (POP). Biopsy specimens were obtained from the anterior apex of the vagina and bilateral USLs from women with control, SUI, SUI combined POP and POP. Western blot and real-time polymerase chain reaction (RT-PCR) were used to determine HOXA 11 and HOXA13 expression. In addition, we performed RT-PCR to be compared with the expression of MMP2, MMP9, collagen I and collagen Ш in vaginal wall and USLs of all enrolled patients. HOXA 11 expression in USLs was decreased in 2 fold change compared with control. Vaginal HOXA13 expression was 2.5-4 fold lower in patients with either SUI and/or prolapse than in controls (p<0.05). In both collagen I and collagen Ш, these expressions were lower than in groups of patients (p<0.05). There were no differences in HOXA11 and 13 expressions between SUI and SUI combined POP or between SUI combined POP and POP group. Expression of HOXA13 and both collagens in vagina is diminished in womens with SUI, SUI combined POP and POP compared with women with normal support. Expression of HOXA 11 and both collagens in USLs is also decreased to all patients. A better understanding of the influence of these genes may prove beneficial in defining the underlying etiologies of the development of pelvic floor disorder and aid in the development of new treatment options.
Original Articles : Type and cause of Liver disease in Korea: single-center experience, 2005-2010
( Sang Soo Lee ),( Young Sang Byoun ),( Sook Hyang Jeong ),( Yeo Myung Kim ),( Ho Gil ),( Bo Young Min ),( Mun Hyuk Seong ),( Eun Sun Jang ),( Jin Wook Kim ) 대한간학회 2012 Clinical and Molecular Hepatology(대한간학회지) Vol.18 No.3
Background/Aims: The aim of this study was to describe the types and causes of liver disease in patients from a single community hospital in Korea between April 2005 and May 2010. Methods: A cohort of patients who visited the liver clinic of the hospital during the aforementioned time period were consecutively enrolled ( n=6,307). Consistent diagnostic criteria for each liver disease were set by a single, experienced hepatologist, and the diagnosis of all of the enrolled patients was confirmed by retrospective review of their medical records. Results: Among the 6,307 patients, 528 (8.4%) were classified as acute hepatitis, 3,957 (62.7%) as chronic hepatitis, 767 (12.2%) as liver cirrhosis, 509 (8.1%) as primary liver cancer, and 546 (8.7%) as a benign liver mass or other diseases. The etiologies in the acute hepatitis group in decreasing order of prevalence were hepatitis A (44.3%), toxic hepatitis (32.4%), other hepatitis viruses (13.8%), and cryptogenic hepatitis (9.1%). In the chronic hepatitis group, 51.2% of cases were attributed to viral hepatitis, 33.3% to nonalcoholic fatty liver disease, and 13.0% to alcoholic liver disease (ALD). Of the cirrhoses, 73.4% were attributable to viral causes and 18.1% to alcohol. Of the hepatocellular carcinoma cases, 86.6% were attributed to viral hepatitis and 11.6% to ALD. Among the benign tumors, hemangioma comprised 52.2% and cystic liver disease comprised 33.7%. Conclusions: Knowledge of the current status of the type and cause of liver disease in Korea may be valuable as a basis for evaluating changing trends in liver disease in that country. (Clin Mol Hepatol 2012;18:309-315)
Calculation of weathering rates to critical loads for acidity of forest soils in the limestone
( Sang Jin Yeo ),( Soo Jin Kim ) 한국광물학회 2000 한국광물학회.한국암석학회 공동학술발표회 논문집 Vol.2000 No.-
Weathering rate of soils is one of the important factors for calculating the critical loads for terrestrial ecosystem. So far, several methods have been agreed in European countries for the estimation of soil weathering rates and have been adopted for critical loads mapping. It is suggested in the mapping manual that the soils in the limestone area are assumed to have high weathering rates (>2keq/ha/yr) on the assumption that the soils consist chiefly of calcite and/or dolomite. But the present study shows that the forest soils developed on the limestone area of Korea are composed mainly of quartz, illite, vermiculite, chlorite, etc. in the order of abundance as evidenced by X-ray diffraction (XRD) analysis. Calcite was not detected in the soil profile down to the depth of 1.05m. The soil profile was divided into 4 horizons for calculation of weathering rates using PROFILE model. Soil sample from each horizon was quantitatively analyzed by XRD. It turned out that the weathering rate of the profile is 1.319 keq/ha/yr, which is much lower than the high rate (2.25 - 2.75 or more) expected from the Mapping Manual. This result indicates that soils developed on the limestone area can have mineralogy quite different from the bed rocks and that the weathering rates of soils in the forest carbonate area are much lower than expected. Therefore, it is needed to estimate the soil weathering rates for calculation of critical loads in the carbonate rock area on the basis of a careful quantitative mineralogical analysis of soils.