복합구조물의 파괴에 관한 치수효과의 중요성

정영화,김경진,원치문,심도식 江原大學校 産業技術硏究所 1995 産業技術硏究 Vol.15 No.-

In this paper, the importance of the size effects on the strength ratio is demonstrated by numerical results. The rate of decrease of tensile strength is for glass fiber, based on the experience of a composite manufacturing specialist. For other material, similar procedure may be used until detailed test result on such material is available. The strength criteria used is that of Tsai-Wu for stress space. The factors influencing the ratio are, reducing the tensile strength alone or both tensile and compression strengths, selection of the normalized interaction term, that is, the generalized Von Mises criterion or the Hill's criterion, and the status of applied stresses. Some of the numerical results are presented for a guideline for the furture study.

식도암과 위암이 동시에 발생한 원발성 중복암 1예

윤혜원,심기남,나선경,송도경,정정화,정가영 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2

Double primary cancers are two independently developed cancers in an individual. There have been some reports on double primary cancer since Billroth reported it for the first time in 1879. Double primary cancer of the stomach and esophagus has been revealed a very low incidence worldwide. The incidence of an esophageal cancer with another primary cancer is reported to be 9.5∼27%, but double primary cancers in the esophagus and stomach have been rarely reported to our knowledge. In this study, we present here a case of double primary esophageal and stomach cancer in a 66-year-old man because of progressive dysphagia.

초내열합금 Inconel의 가공성 평가

정경효,원종식,정윤교 國立 昌原大學校 産業技術硏究所 1996 産技硏論文集 Vol.10 No.-

Inconel, super heat-resistant alloy is superior in the toughness and the creep strength. It can especially endure high temperature and corrosion. It has been, therefore, broadly used in the various fields of atomic industry, aerospace, industrial mechanics and automobile etc. But such inherent properties as high temperature strength, an affinity with tool materials and low heat-conductivity etc. of Inconel alloy 600 degrade machinability. As a result, they cause many problems in the cutting process. In this study, machinability of Inconel alloy 600 was estimated on stand points of cutting force, tool wear and welding of chip for the cutting edge. Inconel alloy 600 was cut by precision high-speed lathe and tool material was used coated tungsten carbide insert(CTCI) and ceramic insert(CI) to be done in general. Cutting force is measured by the piezo type tool dynamometer and cutting edge is observed by scanning electron microscope(SEM). As a experiment result, obtained conclusions as follows. (1) In the case of cutting Inconel alloy 600 with CTCI, value of cutting force is similar its of SM45C. In this case, however, we can not avoid the cutting trobles that is ; the large width of fluctuations for cutting force and welding of cutting chips for cutting edge because of the toughness of the material. (2) In the case of using CI, the brittleness of the tool resulted in chipping. (3) Available cutting conditions of Inconel alloy 600 for CTCI and CI were established.

캡슐내시경과 단일풍선 소장내시경으로 진단된 공장의 간질종양 1예

송도경,심기남,태정현,김경진,송명은,송하응,윤혜원,정가영,정정화 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2

Gastrointestinal stromal tumors (GISTs) are common mesenchymal tumors that arise in the wall of the gastrointestinal tract. We report a case of obscure gastrointestinal bleeding due to a GIST of the jejunum successfully documented by videocapsule endoscopy (VCE) and single-balloon enteroscopy (SBE). A 36-year-old man with hematochezia was referred for further evaluation of no evidence of bleeding focus on esophagogastroduodenoscopy and colonoscopy. A VCE showed a suspicious ulcerative hyperemic mass that located in about 1 hour apart from duodenal second portion. SBE revealed a nonbleeding 4×2 cm mass with an ulcer at the proximal jejunum. The patient underwent laparoscopic resection without complication. Histological examination revealed a well circumscribed, dumbbell-shaped firm mass comprised of spindle cells. Immunohistochemical staining for CD 117 was diffusely positive, whereas staining for S-100, CD 34 and MIB-1 was all negative. It was confirmed to be a low-grade GIST at the proximal jejunum.

논토양중 카드뮴 유효도와 수도의 흡수이행에 미치는 석회 및 Humic acid 사용효과

김민경,김원일,정구복,박광래,윤순강,엄기철 한국환경농학회 2004 한국환경농학회지 Vol.23 No.1

토양중 중금속이 식물에 흡수 및 이행되는 것을 경감시켜 여기에서 생산된 농산물의 안전성 향상을 위한 기초자료를 확보하고 논토양의 카드뮴 유효도와 흡수이행에 미치는 석회와 humic acid 처리 효과를 구명하기 위하여 실내경험과 포트실험을 수행하였다. 실내실험에서 공시토양에 2.5와 5.0 ton/ha의 석회와 1%와 2% humic acid를 처리한 후 토양중 가용성 카드뮴 함량 변화를 조사한 결과, 두 처리 모두 14일까지는 담수상태에서 처리효과로 인하여 가용성 카드뮴 함량이 감소하다가 그 이후에는 토양의 완충능에 의해 다시 증가하는 경향이었다. 이때, 토양의 가용성 카드뮴 함량은 토양 pH 및 양이온치환용량과 부의 상관이 있었다. 2.5 ton/ha의 석회와 1% 의 humic acid를 처리한 후 담수시켜 안정화된 다음 벼를 재배하여 조사한 결과, 석회와 humic acid 처리에 비해 분얼기와 수확기의 치화태 및 수용태 카드뮴 함량이 낮아졌으나, 분얼기에 비해 수확기에 토양중 이동이 어려운 산화물 및 탄산염태와 황화물 및 잔류태의 함량이 증가하였다. 식물에 흡수가 용이한 형태로 알려진 치환태와 수용태는 모두 토양 pH와 고도의 부의 상관이 있었다. 수확기의 줄기, 잎 및 현미 건물중은 석회 및 humic acide 처리구에서 대조구에 비해 모두 높았고, 특히 석회 처리구의 건물중이 현저하게 높았다. 석회 처리구에서 줄기와 잎의 카드뮴 함량은 각각 1.01과 0.37㎎/㎏으로 대조구와 비슷하였으나, 뿌리나 현미의 카드뮴 ?량은 각각 2.11과 0.09㎎/㎏으로 대조구에 비해 낮았다. 지상부와 뿌리의 카드뮴 함량은 humic acid 처리에 의해 현저히 낮아졌으며, 특히 현미로의 카드뮴 이행도 월등히 낮게 나타난다. This study was conducted to know the effect of lime and humic acid on cadmium availability and its uptake by plant grown in contaminated paddy soils with heavy metal. The treatment levels of lime were 2.5 and 5.0 ton/ha and that of humic acid were 1 and 2%. The contents of 0.1 N HCl extractable Cd were reduced with lime and humic acid and were negatively correlated with CEC as well as soil pH. The sequential extraction procedure was used to fractionate the heavy metals in soil into the designated from exchangeable (0.5 M KNO₃), water soluble (H₂O), organically bound (0.5 M NaOH), carbonate (0.05 M Na₂-EDTA) and sulfide/residual (4 M HNO₃). In soil amended with 2.5 ton/ha lime and 1% humic acid, chemical forms of Cd at tillering stage were predominant exchangeable+water soluble extractable Cd, whereas that at harvesting stage were predominant carbonate+sulfide/residual extractable Cd. The exchangeable forms of Cd in soil with lime and humic acid were negatively correlated with soil pH during the harvesting period. Total absorbed Cd of paddy rice tended to occur in the order of root > stem > leaf > brown rice. Cd con- tents of brown rice with lime and humic acid treatment were 0.09 and 0.08 mg/kg, respectively. That were lower than control, 0.20 ㎎/㎏. It could be that treatment of lime and humic acid in polluted soil by heavy metals would reduce the uptake of heavy metals by plants and be a temporary method of reclamation at the highly heavy metal contaminated soils.

朱震亨의 中風論에 관한 考察

고경덕,이동원,정승현,신길조,이원철 동국대학교 한의학연구소 1997 東國韓醫學硏究所論文集 Vol.6 No.1

朱震亨은 金元四大家중 가장 후대의 인물로서 朱子學의 철학적 배경에 근거하여 劉河間, 張子和, 李??의 장점을 흡수하여 醫論을 펼쳤으므로, 金元四大家의 中風 內因論을 인식하는데 있어 그 의미가 크다. 朱震亨 中風論의 특징은 그가 거처한 純域的 特性에 근거하여 肥瘦人과 半身不遂의 左右에 따라 각각 治法을 달리하였으나, 中風 病因病理를 濕痰生熱로 보고 內因의 주요소로 痰을 중시하여 中風入方藥物은 治痰한다는 원칙에 기준하여 藥物을 사용하였다. 이러한 독특한 中風論은 후대 中風 內因論의 발전에 지대한 영향을 주었으므로, 이에 관한 연구는 中風 內因論 측면에서 韓醫學發展에 寄與할 것으로 恩慮된다. We inquired into the origins, pathologies, theraphies and prescriptions of Jungpung(中風) especially on the ground of Keokchiyeron(格致餘論)ㆍDangeosimbub(丹溪心法) written by JuJinHyoung(朱震亨) as modical blocks, from this study we could get that conclusions. 1. According to special feature of the theroies of JuJinHyoung's(朱震亨) Jungpung(中風) he thought pathologies of Jungpung(中風) as 「sub seong dam dam seong yeol yeol seong puns 濕疾痰痰生熱 熱生_風」through studying stress on regional characteristics and thought much of dam(疲) as one of major elements of internal causes. 2. He suggested chi-dam(治痰) in the first place in the treatment of Jungpung(中風) and emphasises the treatment using Succus Pyllostachyos(竹瀝), waterly extracted Rhizoma Zingiberis(鐘汁) in that they had the virtues of sodam-ganghwa(消痰降火), geo-gyeongrak(開經絡), haeng-heolgi(行血氣). 3. He treated differently whether a man in fat and thin, and have right or left hemiplegia, but he prescribed herb-medications on the principle that medications should have the virtues of chi-dam(治痰).

오픈프라이스 제도에 대한 소비자인식도 및 만족도

김인석, 서경원, 유현정 충북대학교 생활과학연구소 2013 생활과학연구논총 Vol.17 No.2

The purpose of this study was to analyze consumers' awareness and satisfaction of open price system. Questionnaire survey was conducted from 3 September to 14 September 2011. We have surveyed 200 consumers who were living in Cheongju area. Major findings are as follows. First, consumers were not aware about open price system very well. The mean of the objectives and expected effects of open price system was 2.38. It means that many consumers when it comes to the open price system does not have the proper recognition was considered. Second, there was not big changes for consumers' information search behavior after execution the open price system. Third, consumers' satisfaction mean(m=2.32) of open price system was lower than dissatisfaction mean(m=3.40) of that. The main reason of dissatisfaction due to inconsistent pricing confusion was investigated. Fourth, there were statistic differences in open price system awareness and consumer behavior by consumers' socio-economics characteristics such as age, education, income, occupation, etc. Finally, consumers' satisfaction of open price system was influence by information search cost, product or brand image. On the other hand, consumers' dissatisfaction was only influence by open price system awareness.

요통환자의 외래 진료양상에 대한 조사

조무식,김선주,원혜윤,고정관,이경석 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2

We report a series of 220 patients with low back pain who visited through neurosurgical out-patient department(OPD) from January 1994 to June 1994. We investigated how they were treated and what was the outcome on December 1995 by telephone interview. During the study period, 176 patients (80%) visited our OPD not more than twice. Frequency of OPD visit was single in 138 patients (62.7%), twice in 38 patients (17.3%), and over twice in 44 patients (20.0%). Twenty six patients (11.8%) were admitted, and 16 patients (7.3%) underwent an operation. Sixteen patients underwent surgery in this hospital, and the other 12 patients underwent surgery in any other hospitals. The rate of revisit was relatively high in patients who had a special study (58.1%), whose impression was herniated lumbar disc (41.2%) or degenerative spondylosis (55.6%), and who received prescriptions for drug (42.1%) or underwent an operation(87.5%). The rate of special study, prescriptions and/or operations of was relatively low in this hospital, which seems to lessen the rate of revisit. More active management seems to be necessary for the patient' satisfaction.

급성 골수성 백혈병 환자에서 발생한 침습성 아스페르길루스중에 대한 수술적치료 1 예

배영환;어원식;어상민;김승만 김태영;박수영;서영경;정은주;안효정 인제대학교 2011 仁濟醫學 Vol.32 No.-

Invasive pulmonary aspergillosis is known to have a poor prognosis and major cause of morbidity and motality in patients with hematologic disease. Without adequate therapy, invasive pulmonary aspergillosis will almost always progress to fatal pneumonia. Early administration of antifungal agents in patient with invasive pulmonary aspergillosis is most important. And surgical resection of aspergillous-infected tissue may be useful in patients with lesions that are contiguous with great vessel and lesions causing hemoptysis. We reported a rare case of surgical resection as curative treatment for invasive pulmonary aspergillosis patient in 58-year-old man who had the history of acute myeloid leukemia.

볼엔드밀 가공시 이송변화에 따른 가공형상 특성

왕덕현,김원일,이윤경,임채열,우정윤,박창수 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.2

Due to the development of the CNC machine tool and CAM software, sculptured surface machining can be broadly used in die and mold industries and ball end milling process is often used for the sculptured surface machining. It is found out how feedrate affects the precision of the machining and also tried to study the most suitable feedrate in specific cutting condition. Two eddy current sensors were used for measuring tool deflections of X, Y axis, dynamometer for cutting force and roundness tester for roundness. It was found that the tool deflection is getting better as tool path is going to farther from the center of convex surface. The reason is that the cutting force is increased as the tool approaches to the center. Examining the roundness, cutting force and tool deflection characteristics, it was found that the most suitable feedrate is 90mm/min in convex surface and 120mm/min in concave surface.