판막 질환에서의 심근 섬유화 : 심근 조직을 이용한 형태학적 연구 및 혈청 생화학적 지표의 분석

강수진,박덕우,송재관,박경민,송종민,강덕현,한기훈,송현,이재원,주석중,송명근,김정선 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

친수성 Polyvinylsiloxane 인상재의 putty와 light body의 결합강도

강재경,김경남,조리라,정경호 대한치과기재학회 2000 대한치과재료학회지 Vol.27 No.4

Polyvinylsiloxane is the most accurate and dimensionally stable material among the dental impression materials which replicate the teeth and oral tissues. There are two methods for taking impressions with the polyvinylsiloxane: one step simultaneous polymerization; and putty/wash two step reline technique. The purpose of this study was to evaluate tensile bond strength between putty and wash material under the conditions of contamination with saliva or water at taking impression by putty/wash technique. The materials used in this study were 4 hydrophilic polvinylysiloxane impression materials of putty and light body type(Perfect-F, Handae Chemical, Korea; Contrast, VOCO, Germany; Exaflex and Examix, GC, Japan; Express and Imprint Ⅱ, 3M, U.S.A.). First, putty material filled in one perforated metal mold with diameter of 15 ㎜ and height of 19 ㎜ was set, and it was bonded with light body material filled in other paired metal mold before setting. Tensile bond strength was measured at a cross-head speed of 300 ㎜/min by universal testing machine (Instron 6022, Instron Co., U.K.) after 10 minutes from the joining two mold in order to set completely. As results, tensile bond strength of Contrast, Examix and Perfect-F showed no significant difference with control group on contamination with saliva or water, and it showed cohesive failure in the light body. However, Imprint Ⅱ showed the highest strength among these tested materials and showed adhesive failure at 5 specimens in the case of contamination with saliva and 4 specimens with water. From the results of this study, each product use possible cross bond and the tensile bond strength of some materials showed lower value on contamination with saliva.

한국과 주요 벼 생산국에서 유통되는 브랜드 쌀의 외관 특성 비교

김재현,이정일,강희경,손종록,김제규 한국국제농업개발학회 2002 韓國國際農業開發學會誌 Vol.14 No.2

쌀 품질 고급화에 대비한 기초자료를 얻고자 우리나라 및 외국의 주요 쌀 생산국에서 유통되는 브랜드쌀 45종의 상품적 가치기준의 하나인 외관특성을 조사하였던바 그 결과를 요약하면 다음과 같다. 1. 우리나라와 주요 쌀 생산국에서 수집된 브랜드쌀의 평균 완전미율은 우리나라 쌀이 57.4%로 가장 낮았고, 일본쌀이 86.0%, 호주쌀이 85.2%, 미국쌀은 80.5%, 중국쌀은 79.6%이었다. 2. 수집된 브랜드쌀의 불완전미 함유율은 쇄미, 미숙립 등은 국가별로 큰 차이가 없었으나 심복백미의 경우 우리나라 쌀이 외국쌀에 비하여 매우 많았고 피해립이 우리나라 브랜드 쌀이 많은 편이다. 3. 우리나라 유통 브랜드쌀의 완전미와 불완전미의 상관중 완전미율과 심복백미율간에 고도의 부의 상관을 나타냈으며 완전미율과 쌀가격간에는 상관이 없었다. In an attempt to obtain fundamental data for the elevation of rice quality, we examined the appearance property of rice circulating in home and foreign countries, which is considered as a commercial value of brand rice. The average ratio of head rice was the highest for the Japanese rice, 86.0%, followed by Australian 85.2%, American 80.5%, and Chinese 79.6% and the Korean brand marked only 57.4%, the lowest value. when we consider the incomplete rice ratio of foreign brand rices, broken, damaged, and immature kernels were found by similar level but the ratio of white core & belly rice was more found from our rice than foreign rices. Among the correlations from head rice and incomplete rices, a very high negative-correlation was shown between head rice and white core & belly rice ratio. Any correlation was not found between head rice ratio and price.

침습성 아스페르길수스증 진단을 위항 갈락토만난 항원검사의 유용성 평가

송경호,이신원,장희창,전재현,박완범,박경운,박상원,오명돈,최강원 대한감염학회 2009 감염과 화학요법 Vol.41 No.2

Background : Invasive aspergillosis (IA) is an important cause of morbidity and mortality among immunocompromised patients. However, 1A is difficult to diagnose, especially in the aforementioned patient group. Recently, galactomannan assay (GMA) using enzyme immunoassay has been introduced in Korea. We evaluated its diagnostic usefulness in the diagnosis of 1A and we analyzed the results according to the underlying diseases. Materials and Methods : All patients who underwent GMA during the period from October 2007 to June 2008 were evaluated retrospectively. According to the criteria of European Organization for Research and Treatment of Cancer/Mycoses Study Group, IA was classified into four clinical categories: proven', probable', possible', and 'non' IA. Patients with 'proven' and 'probable' IA were used as the reference standards for IA. GMA was performed using Platelia Aspergillus EIA (Bio-Rad, Hercules, CA, USA). Optical density index ≥0.5 was considered positive. Results : Of the 144 patients who underwent GMA, two patients were classificed as proven' IA and sixteen patients were probable' 1A. Overall sensitivity, specificity, positive predictive value, and negative predictive value of the assay were 50% (95% confidence interval [C195), 26-74%), 88% (C195, 81-93%), 38% (CI95, 19-59%), and 93% (CI95, 86-97%), respectively. Among the 99 patients with underlying hematologic diseases, GMA showed 67% (C195, 35-90%) sensitivity and 89% (C195, 80-94%) specificity, whereas in 45 patients with underlying diseases other than hematologic diseases, sensitivity and specificity of the assay were 17% (CI95, 0-64%) and 87% (CI95, 73-96%), respectively. Conclusions : GMA showed high specificity, irrespective of the patient population. However, sensitivity of GMA was low and the assay was less sensitive in patients with underlying diseases other than hematologic diseases than in patients with hematologic diseases.

두개강내로 전이된 Adenoid Cystic Carcinoma 2례 : 증례보고 Report of Two Cases

송재욱,윤상민,이창훈,장지수,이승훈,조경자,강신광 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.10

The authors describe two cases of unusual intracranial metastatic adenoid cystic carcinomas. A 42-year-old woman had a right pariental epidural metastatic mass. presumed hematogenous. spread from a primary tumor in the parotid gland. In second case, a 32-year-old man had a intracranial metastatic adenoid cystic carcinoma mimicking calcified psammomatous meningioma on CT scans. We present these unusual cases with a review of relevant literature and a discussion of possible pathogenesis.

장치 및 미디어 관리를 통한 네트워크 기방 백업 및 복구

복경수,강태호,윤종현,유재수 충북대학교 컴퓨터정보통신 연구소 2005 컴퓨터정보통신연구 Vol.13 No.1

저장 매체의 대용량화가 가속화되면서 대용량의 데이터를 효과적으로 백업하기 위한 요구가 증가되고 있다. 본 논문에서는 네트워크 장치 및 미디어 관리를 통해 네트워크 기반 백업 및 복구를 지원하는 백업 소프트웨어를 설계하고 구현한다. 제안하는 백업 소프트웨어는 디스크 기반 백업을 지원하기 위해 NDMP 프로토콜을 확장한다. 제안하는 백업 소프트웨어는 전체 또는 부분 백업, 수동 또는 자동백업 기능을 제공한다. 또한, 사용자에 의해 요청되는 부가적인 작업을 처리하기 위해 pre/post 스크립트 기능을 제공한다. 제안하는 백업 소프트웨어는 백업 장치 및 미디어를 효과적으로 관리하고 이를 풀(pool)이라는 논리적인 단위로 관리하는 장치 및 미디어 관리 기능을 제공한다. As the size of storage media is growing, the efficient backup for the huge capacity data are required. In this paper, we design and implement the backup software that supports network based backup and restore with management of network devices and media. The proposed backup software extends NDMP protocol for the disk to disk backup. In addition, the proposed backup software has various features such as partial or full backup, immediate or automatic backup, and so on. It supports pre/post script to process additional actions for users. It also provides devices and medium management features that efficiently manages a large number of backup devices and media, and groups devices and media management functions that are managed by logical units called pools.

프로그램화 된 신체운동이 ADHD 아동의 주의산만행동과 과잉행동에 미치는 효과

최재원(Jae Won Choi),강경두(Kyoung Doo Kang),정혜연(Hye Yeon Jung) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.47

The purpose of this study is to deeply analyze a change of the programmed physical exercise in attentiondeficient behavior and hyperactivity of children with ADHD, through the single-subject research design method. The research subjects were 4 elementary school students who are under being cured due to being judged to be ADHD at Child Psychiatric Clinic for C University Hospital where is located in Seoul at that time of beginning experiment in order to be conformed with the objective of research. For visual observation, the attention-deficient behavior was used the frequency-typed case sampling method(Shin So-yeon, Park Jaeguk, Kim Yeong-mi, Lee Hwa-eun, 2007). Observation of hyperactivity was used the contents, which Carlson and Hotfield(1991) defined, by referring to the contents by Mun Jae-gyeong(1998). The following are the results that were elicited through the research procedure of this study. First, the programmed physical exercise was indicated to reduce attention-deficient behavior in children with ADHD. Second, the programmed physical exercise was indicated to reduce hyperactivity in children with ADHD.

등척성 운동 시 요추의 각도에 따른 중앙주파수와 토크의 특성

박경희,권오윤,장근,강성재,김영호 한국전문물리치료학회 2001 한국전문물리치료학회지 Vol.8 No.2

Fatigue is the decline in force produced as a result of prolonged muscle activity. Localized muscle fatigue can be identified by a shift toward low in the frequency components of the EMG signal, typically represented by a fall in the median frequency. Previous studies show that a shortened muscle developes a higher fatigue than elongated muscles. The purpose of this study was to investigate the time-related change of median frequency and torque during maximal isometric back extension exercises at different exercise angles (0˚, 12˚, 36˚, 72˚). Twenty healthy subjects (mean age = 24.35 ± 2.70) were evaluated in this study. Median frequency was extracted from the EMG signals by fast Fourier transform (FFT). Initial median frequency and the slope of median frequency change over time were computed from linear regression analysis. Pearson's product moment correlation was used to quantify the relationship between scope of median frequency and torque. The results were as follows: 1) Significant differences in y-intercepts of torque regression equation with respect to exercise angle were shown. However, there were no differences in the slopes of the median frequency and torque, and y intercept of the median frequency among exercise angles. 2) There was no significant correlation between slope of median frequency and torque. 3) But there was moderate correlation between median frequency and torque at each exercise angle. In conclusion, the exercise angle during maximal isometric back extension exercise is not a direct effect on slope of median frequency and torque. But results showed that median frequency and torque shift were highly correlated in all subjects.

전방 또는 전측방 흉수 종양 수술에서 후측방도달법

조경석,박춘근,성재훈,허필우,박춘근,백민우,김달수,강준기 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.5

관상동맥 풍선성형술 후 발생한 관상동맥 박리의 초기 조영술적 고찰

고영엽,강지인,장재혁,강민정,정중화,장경식,홍순표 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1

Background and Objectives: Percutaneous coronary intervention (PCI) is widely utilized in the treatment of symptomatic coronary artery disease (CAD). Althouth it has numerous benefits, intimal tear or dissection, serious and potentially life-threatening complications of plain old balloon angioplasty (POBA) can occur. The aim of this study was to assess the implications of coronary dissections after ballon angioplasty. Methods: 78 consecutive patients (age, 62 +/- 11 years; 46 men, 32 women) identified to two groups as having with or without dissection (dissection (D) group or non-dissection (ND) grouP) underwent balloon angioplsty for CAD were studied. All patients with dissection could be managed by successful stent implantation to rescue the artery. The morbidity of ischemic complication and mortality were evaluated for 30days after PCI. Results: Coronary dissection developed 44 lesions (38%) in 31 patients out of 117 lesions in 78 patients after POBA and a good final angiographic result was obtained in all patients with dissection, Significant correlates of a development of dissection were the lesion morphology of ACC/AHA type B and C (P<0.05). There were no significant correlations of clinical pictures, whether POBA in single vessel disease or in multivessel disease, diameter stenosis before POBA, and balloon/coronary artery diameter ratio. Morphologic feature of dissection was type A in 15 (34%), type B in 13(30%), type C in 12 (27%), and type D in 4 (9%). After PCI, there was no ischemic complication or death related coronary dissection during follow-up period for 30days. Conclusions: Coronary dissection after angioplasty occurred in 44 lesions (38%) out of 117 lesions of 78 consecutive patients underwent POBA. Coronary dissection after POBA significantly correlated with the severity of lesion morphology. Coronary stenting is effective in the management of acute coronary dissections after angioplasty.