국가 대표급과 제주도 고교 대표급 수영선수들의 그랩 스타트의 운동학적 분석

김철원,김승곤,오만원,임상용,김성찬,이창준,남사웅,이세형,류재청,신석종,김세민 濟州大學敎 體育科學硏究所 1998 체육과학연구 Vol.4 No.-

The purpose of the study was to undertaken to analysis the Grab starting technique between national representive team(3) and Cheju's representive team(3) with 3D cinematography. The conclusions obtained were as follows: Cheju's showed more elapsed time than national representive team on starting block. and more vertical than horizontal direction of COG position, more concentrated vertical velocity & acceleration than forward direction. Therefore It is necessory for cheju's to train balanced trust force in horizontal and vertical direction in grab starting technique.

경과 관찰 중에 폐감염이 동반된 선천성 낭성 선종양 기형 1예

김정아,이석현,오동훈,김종연,허진원,이성순 인제대학교 2006 仁濟醫學 Vol.27 No.-

We reported a case of congenital cystic adenomatoid malformation (CCAM), diagnosed two years ago, has been infected during medical observation. She underwent VATS guided right lower lobectomy because of little response to the medical treatment. The prognosis turned out to be excellent and now she is under regular medical observation. Management of asymptomatic CCAM still has a likelihood of controversy but the early surgical resection is recommended on a basis of a variety of reference and literature to verify the diagnosis and lessen the risk of infection or malignant degeneration. Moreover the early surgical intervention has a good prognosis settling complications. Recently VATS lobectomy is considered as an alternative strategy for CCAM, and the early surgical resection may be an ideal approach for asymptomatic CCAM.

실리콘 기판 위의 나선형 인덕터에 대한 SPICE 모델

김영석,박종욱 충북대학교 컴퓨터 정보통신 연구소 2000 컴퓨터정보통신연구 Vol.8 No.1

회로설계 엔지니어들이 쉽게 RF IC 설계에 사용할 수 있는 나선형 인덕터의 SPICE 모델을 개발하였다. 이 모델은 나선형 인덕터의 등가회로 소자 값들을 SPICE의 user-defined function 및 subcircuit 기능을 이용하여, 레이아웃 변수, 공정 변수, 실리콘 기판 변수로부터 정의하였다. 특히 인덕턴스는 임의의 회전에 대한 인덕턴스 Li 및 임의의 두 회전에 대한 상호 인덕턴스 Mij를 subcircuit으로 정의하여 전체 인덕턴스 값을 계산하였다. 모델의 정확성을 검증하기 위하여 CMOS 0.8㎛ 공정으로 제작된 나선형 인덕터의 측정 s- 파라미터, 총 인덕턴스 및 quality-factor 결과를 시뮬레이션 데이터와 비교한 결과 일치함을 확인하였다. 본 논문에서 제시된 SPICE를 이용한 나선형 인덕턴스 모델은 scalable하며, 실리콘 기판의 영향 등을 포함하기 때문에 레이아웃 최저고하에 쉽게 사용할 수 있는 장점을 가진다. The SPICE model of the spiral inductor on silicon substrate which can be easily used for the RF IC design has been developed. In this proposed model the equivalent circuit elements of the spiral inductor are defined by the layout and process parameters using the user-defined function and subcircuit of the SPICE. The total inductance is calculated using the subcircuit Li for the arbitrary turn I and the Mij for two arbitrary turns. The model was verified by comparing the simulated data with the measured s-parameters, total inductance, and quality factor of the spiral inductor fabricated by the CMOS 0.8㎛ process. The proposed SPICE model of the spiral inductor is scalable and includes the effects of the silicon substrate.

부산시 공장지역·주거지역 하천의 수질특성분석

문종익,임영석,박광현,김석택,성낙창,박출재 동아대학교 환경문제연구소 2000 硏究報告 Vol.23 No.1

This study is carried out to investigate the water quality changes in Busan Metropolitan streams. The results are as follows. In Busan Metropolitan streams, the loading rates of contaminants are greater in industrial waste water streams than domestic waste water streams. Some sampling points show a little high loading in autumn, but this needs more investigation to make clear the causes. The level of organic contaminants(BOD_(5) and COD_(MN)) is found to be low and does not show seasonal variation in domestic waste water streams. But, the level of organic contaminants in industrial waste water streams is relatively high and seems to be seasonally variable, which is affected by other factors. The nutrient materials, such as nitrogen(as T-N, about 20mg/L) and phosphorus(as T-P, about 2.0mg/L), are abundant than Nak Dong River and the general trends of contaminants level are similar to those of organic contaminants.

Cascode 구조의 CMOS LNA 해석 및 제작

서종삼,박종욱,김영석 충북대학교 컴퓨터 정보통신 연구소 2000 컴퓨터정보통신연구 Vol.8 No.1

RF 통신시스템에 이용되는 캐스코드 CMOS 저잡음증폭기를 NOSIS 0.5㎛ CMOS 공정을 이용하여 해석하고 제작하였다. 우리는 커패시터와 EEPROM을 이용하여 온칩 주파수 튜닝 회로를 제안했다. 입력단과 출력단에서의 커패시턴스는 EEPROM을 프로그램 함으로써 가변할 수 있고, 그렇게 함으로써 정확한 주파수 매칭이 이루어 질 수 있다. 이 방법의 이점은 외부 튜닝 요소가 필요하지 않다는 것이다. S-파라미터, 잡음지수, IIP3를 모의실험하기 위해서 회로시뮬레이터인 HSPICE를 이용하였다. 모의실험은 24dB의 이득, 2.7dB의 잡음지수, 그리고 4dBm의 IIP3를 나타내었다. 제안된 저잡음증폭기는 MOSIS 0.5㎛ CMOS 공정을 이용하여 제작되었고, 온칩 RF 프로브와 HP8720 네트워크 에널라이져를 이용하여 측정하였다. 제작된 저잡음증폭기의 이득은 1GHz에서 약 17dB를 나타내었다. A cascode CMOS low noise amplifier(LNA) for the radio frequency communication system has been analyzed and fabricated using the MOSIS 0.5㎛ CMOS process. We proposed an on-chip frequency tuning circuit using the tuning capacitor and EEPROM. The capacitance at the input and output port can be varied by programming the EEPROM, so that the exact frequency matching can be achieved. The advantage of this method is that the off-chip tuning element is not necessary. The circuit simulator, HSPICE has been used to simulate s-parameter, noise figure(NF), and third-order intercept point(IP3). The simulation showed the forward gain(S21) of 17dB, the noise figure of 2.7dB, the IIP3 of 4dBm. The proposed LNA was fabricated using the MOSIS 0.5㎛ CMOS process and measured using the on-chip RF probe and the HP8720 network analyzer. The measured S21 of the fabricated LNA was about 17dB at 1GHz.

실측자료를 이용한 교각 세굴방정식의 비교

윤영호,김종섭,연기석 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1

Over the past 30years, numerous studies have been conducted and equations developed to Predict bridge-pier scour. Most of these equations were developed using laboratory data and sometimes tested using limited field data. For a number of the equations, the conditions under which the laboratory experiments were conducted are unknown. In addition, the ranges of the various parameters over which the equations are valid are also typically unknown. Even if the range of data used in the laboratory study is known, it is quite uncertain as to flow those ranges, using small-scale models, correlate to prototype conditions. The purpose of this study is to compare seven bridge-pier-scour equations using field data. Data for live-bed scour will be examined; most floods the stream bed is live, there are cases. The limitaions of each of the equations will be examined for the purpose of providing guidance to hydraulic engineers concerned with scour at bridge piers.

The Association Between the Serum Sodium Level and the Severity of Complications in Liver Cirrhosis

( Jong Hoon Kim ),( June Sung Lee ),( Seuk Hyun Lee ),( Won Ki Bae ),( Nam Hoon Kim ),( Kyung Ah Kim ),( Young Soo Moon ) 대한내과학회 2009 The Korean Journal of Internal Medicine Vol.24 No.2

Background/Aims: Dilutional hyponatremia associated with liver cirrhosis is caused by impaired free water clearance. Several studies have shown that serum sodium levels correlate with survival in cirrhotic patients. Little is known, however, regarding the relationship between the degree of dilutional hyponatremia and development of cirrhotic complications. The aim of this study was to evaluate the association between the serum sodium level and the severity of complications in liver cirrhosis. Methods: Data of inpatients with cirrhotic complications were collected retrospectively. The serum sodium levels and severity of complications of 188 inpatients were analyzed. Results: The prevalence of dilutional hyponatremia, classified as serum sodium concentrations of ≤135 mmol/L, ≤130 mmol/L, and ≤125 mmol/L, were 20.8%, 14.9%, and 12.2%, respectively. The serum sodium level was strongly associated with the severity of liver function impairment as assessed by Child-Pugh and MELD scores (p<0.0001). Even a mild hyponatremia with a serum sodium concentration of 131-135 mmol/L was associated with severe complications. Sodium levels less than 130 mmol/L indicated the existence of massive ascites (OR, 2.685; CI, 1.316-5.477; p=0.007), grade III or higher hepatic encephalopathy (OR, 5.891; CI, 1.490-23.300; p=0.011), spontaneous bacterial peritonitis (OR, 2.562; CI, 1.162-5.653; p=0.020), and hepatic hydrothorax (OR, 5.723; CI, 1.889-17.336; p=0.002). Conclusions: Hyponatremia, especially serum levels ≤130 mmol/L, may indicate the existence of severe complications associated with liver cirrhosis. (Korean J Intern Med 2009;24:106-112)

Dihydroavenanthramide D prevents UV-irradiated generation of reactive oxygen species and expression of matrix metalloproteinase-1 and -3 in human dermal fibroblasts

Kim, Jeong-Mi,Noh, Eun-Mi,Kwon, Kang-Beom,Hwang, Bo-Mi,Hwang, Jin-Ki,You, Yong-Ouk,Kim, Min Seuk,Lee, Wan,Lee, Jeong-Ho,Kim, Hye-Jung,Kim, Jong-Suk,Lee, Young-Rae BlackWell Publishing Ltd 2013 Experimental dermatology Vol.22 No.11

<P>Ultraviolet B (UVB) radiation induces photoageing by upregulating the expression of matrix metalloproteinases (MMPs) in human skin cells. Dihydroavenanthramide D (DHAvD) is a synthetic analog to naturally occurring avenanthramide, which is the active component in oats. Although anti-inflammatory, anti-atherosclerotic and antioxidant effects have been reported, the antiphotoageing effects of DHAvD are yet to be understood. In this study, we investigated the inhibitory effects of DHAvD on UVB-induced production of reactive oxygen species (ROS) and expression of MMPs, and its molecular mechanism in UVB-irradiated human dermal fibroblasts. Western blot and real-time PCR analyses revealed that DHAvD inhibited UVB-induced MMP-1 and MMP-3 expression. It also significantly blocked UVB-induced ROS generation in fibroblasts. Additionally, DHAvD attenuated UVB-induced phosphorylation of MAPKs, activation of NF-κB and AP-1. DHAvD regulates UVB-irradiated MMP expression by inhibiting ROS-mediated MAPK/NF-κB and AP-1 activation. DHAvD may be a useful candidate for preventing UV light-induced skin photoageing.</P>

Genome Sequence of the Polymyxin-Producing Plant-Probiotic Rhizobacterium Paenibacillus polymyxa E681

Kim, Jihyun F.,Jeong, Haeyoung,Park, Soo-Young,Kim, Seong-Bin,Park, Yon Kyoung,Choi, Soo-Keun,Ryu, Choong-Min,Hur, Cheol-Goo,Ghim, Sa-Youl,Oh, Tae Kwang,Kim, Jae Jong,Park, Chang Seuk,Park, Seung-Hwan American Society for Microbiology 2010 Journal of Bacteriology Vol.192 No.22

<B>ABSTRACT</B><P><I>Paenibacillus polymyxa</I> E681, a spore-forming, low-G+C, Gram-positive bacterium isolated from the rhizosphere of winter barley grown in South Korea, has great potential for agricultural applications due to its ability to promote plant growth and suppress plant diseases. Here we present the complete genome sequence of <I>P. polymyxa</I> E681. Its 5.4-Mb genome encodes functions specialized to the plant-associated lifestyle and characteristics that are beneficial to plants, such as the production of a plant growth hormone, antibiotics, and hydrolytic enzymes.</P>

Renal Dysfunction Induced by Bacterial Infection other than Spontaneous Bacterial Peritonitis in Patients with Cirrhosis: Incidence and Risk Factor

( Jong Hoon Kim ),( June Sung Lee ),( Seuk Hyun Lee ),( Won Ki Bae ),( Nam Hoon Kim ),( Kyung Ah Kim ),( Young Soo Moon ) 대한소화기기능성질환·운동학회 2009 Gut and Liver Vol.3 No.4

Background/Aims: Deterioration of renal function in cirrhotic patients with spontaneous bacterial peritonitis (SBP) is a predictor for in-hospital mortality; however, the clinical significance of renal dysfunction during bacterial infection other than SBP is unknown. The aim of this study was to investigate the prevalence and clinical significance of renal dysfunction due to bacterial infections other than SBP in patients with liver cirrhosis. Methods: Retrospective data from inpatients with bacterial infections other than SBP were analyzed. Results: Eighty patients were recruited for the analysis. The types of infections included that of urinary tract (37.5%), pneumonia (23.8%), biliary tract (20%), cellulitis (12.5%), and bacteremia of unknown origin (6.3%). Renal dysfunction developed in 29 patients (36.3%), of which 11 patients had irreversible renal dysfunction. The initial MELD score, neutrophil count, albumin, and blood pressure were significant risk factors in the univariate analysis, whereas only the MELD score was an independent risk factor for the development of renal dysfunction (p<0.001) after multivariate analysis. Conclusions: The prevalence of renal dysfunction during bacterial infection other than SBP in patients with liver cirrhosis was 36.3%, and its development was related to the severity of the liver disease. Occurrence of irreversible renal dysfunction seemed to affect the prognosis of these patients. (Gut and Liver 2009;3:292-297)