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조용주,임춘성,신기태,허영무 한국경영과학회 2003 한국경영과학회 학술대회논문집 Vol.- No.1
현재 금형공장에서는 변화하는 시장에 빠른 반응을 보이고, 생산하고 있는 제품의 높은 품질과 낮은 가격을 보장하기 위하여 기존 시스템과 인터넷을 접목하려는 많은 시도를 하고 있다. 금형공장에는 ETO(Engineering-To-Order) 방식의 제조방식과 사출금형의 특수성으로 인하여 표준견적 시스템의 개발이 어렵다. 그리고 영업과 수주에 반영할 객관적인 정보가 없으며, 고객의 요청 시 실시간으로 확인 가능한 정보가 존재하지 않는다. 이러한 금형공장의 특징을 반영하고, 문제점을 극복할 수 있는 협업적 전자주문 처리 시스템의 프레임윅(framework)을 설계하고, 또한 각 세부 모듈인 견적가격 산정기능(Cost Estimation Tool), 납기 가능일자 산정기능(Leadtime Tool), 주문상황 응답처리 기능(Order Status Tool), 작업상황 파악기능(Shop Status Tool)을 설계한다. 그리고 현장 적용이 가능하도록 하기 위하여 금형공장의 업무 프로세스를 분석한다. 그리고 주문처리 프로세스의 UMM방법론 모델링을 통하여 윈형(prototype) 시스템을 설계 및 개발하고자 한다.
박주경,소정일,류진호,김성근,허탁,민용일 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4
Bilateral diaphragmatic paralysis(BDP) is a rare disorder, which can be secondary to spinal cord injury, motor neuron disease, myopathy, noninfectious polyneuropathy, infection, iced saline cardioplegia performed during cardiac surgery, or idiopathic causes. There may be typical presentations such as dyspnea, paradoxical respiratory movement, and hypercapnic respiratory failure. It needs to exclude above secondary causes to consider idiopathic bilateral diaphragmatic paralysis. We report a 51-years-old man who presented with idiopathic bilateral diaphragmatic paralysis combined with acute pancreatitis. We couldn't find out the association of these two clinical conditions. The patient was improved by mechanical ventilation.
경추손상이 의심되는 환자에서 경추전방 연부조직 폭 측정의 의의
박주경,김성근,윤한덕,허탁,조석주,민용일 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2
Prevertebral soft tissue swelling of cervical spine lateral radiogram is well known as an indirect evidence of occult cervical spine injury. But the clinical and statistical value of it has been of debate. We tried to analyse the value of cervical prevertebral soft tissue width as a screening test for cervical spine injury by comparison of two categorized study groups; the control group, traumatized patients without cervical spine injury and the injury and the injury group, traumatized patients with bony cervical injury. The injury group consisted of patients admitted between September 1993 and December 1994 with an ED diagnosis of bony cervical injury. The control group consisted of patients admitted between January 1994 and June 1994 who received cervical spine lateral radiograph because of suspicion of cervical spine injury or as a routine check. In both group, we sampled the patients who received cervical spine lateral rediograph within 24 hours after injury and excluded the patients less than 15 years old and more than 65 years old, In the control group, we confirmed the patients had no problem in cervical spine of follow-up. 101 control patients and 68 injury patients were identified. The injury group was further divided into two subgroups: those with injuries at C1-C3 to the upper injury subgroup and those with injuries at C4-C7 to the lower injury sub group. The prevertebral soft tissue widths of injury group were larger than of control group at C2(mean 6.1mm versus 4.5mm) and also at C6(mean 13.4mm versus 11.2mm). Especially upper injury subgroup had quite large value of C2 prevertebral soft tissue width(mean 14.1mm). Nevertheless, both in C2 and C6, there is no cutoff value with acceptable sensitivity and specificity as a screening test. But the 7mm at C2 and 14mm at C6 had high specificity(90%) and were thought to be a good radiologic indicators of further evaluation.
임정환,오봉렬,나국주,김현수,윤한덕,허 탁,조석주,민용일 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.1
The evaluation of patients with microscopic hematuria after blunt abdominal trauma has become controversial. We tested the hypothesis that renal contusion can be diagnosed clinically and that these patients do not require radiographic evaluation. To evaluate the association of microscopic hematuria without shock and with renal injury, we reviewed the medical records of 252 patients following blunt abdominal trauma. Microscopic hematuria without shock was noted in 58 of 252 patients. Of the 58 patients 52 had renal contusion, 4 had renal laceration, 1 had a renal rupture and 1 had renal pedicle injury. All of the patients with renal contusions experienced no complications from nonoperative management. But, avoiding a radiopraphic evaluation in patients with blunt renal trauma plus microscopic hematuria and no shock would miss a few cases of severe renal injury.
윤한덕,류진호,박주경,허탁,조석주,김성근,민용일 大韓應急醫學會 1997 대한응급의학회지 Vol.8 No.1
We analyzed records at Chonnam university hospital from Sep. 1. 1993 to Aug. 31. 1996 to assess clinical significance of the foreign body in the gastrointestinal tract. There were 133 episodes consisting of 79 pediatric and 54 adult patients as possible to review. In the pediatric patients, the coin was the most common cause of foreign body ingestion, while adult patients were usually caused by bones and meat. We removed foreign bodies in the oral cavity and oropharynx in 12 cases using direct laryngopharyngoscpy and forcep. Endoscopy was performed successfully in 47 of 51 patients in which was attempted; there were two complications composed of an aspiration pneumonia and a mediastinitis due to esophageal perforation. There were spontaneous passage of foreign bodies in 48 cases. We observed complications in 6 cases in which 4 cases needed operations due to complications. Foreign bodies which pass into the stomach can be observed for development of complications, as 94% of foreign bodies which reach the stomach spontaneously pass. Only 4 patients required interventions, which was done without mortality.
Ju Yeon Lee,Jin Hyung Rho,Min Seok Kim,Yong Ju Heo,Yong Jae Kim,Doo Wan Cho,Da Hee Kim,Bo Kyung Kim,Mi Jin Yang 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
The nose-only exposure method is generally used in inhalation toxicity studies because it has advantage of minimizing exposure to other pathways except the respiratory tract. However, prolonged restraint of animals in nose-only exposure chamber can causes stress by compressing the body and these may affect the experimental results. This study was conducted to investigate whether the restrictive circumstance of nose-only exposure chamber affects the male reproductive systems of Sprague-Dawley(SD) rats in repeated inhalation studies. To evaluate the effect of nose-only exposure chamber on male reproductive system, the incidence of macroscopic and microscopic lesions of testes, epididymides and prostate of SD rats was compared between inhalation and oral gavage toxicity studies. Data were collected from 320 male SD rats from control groups of 30 toxicity studies evaluated at Korea institute of Toxicology (KIT) between 2015 and 2020.In result, the microscopic findings such as tubular atrophy of testes, sperm granuloma of epididymides, pyogranulomatous or granulomatous inflammation of prostate were observed in inhalation toxicity studies. These findings were considered to be related to the macroscopic lesions; flaccidness of testes and nodule, discoloration or edematous appearance of prostate. The incidence of these findings was higher in the inhalation studies than in the oral gavage studies. This result suggests that the prolonged restraint in nose-only exposure chamber can causes macroscopic and microscopic pathological lesions of male reproductive system. Furthermore, notable differences in the incidence of histopathological lesions were not observed in other organ systems between inhalation and oral gavage toxicity studies, so the male reproductive system was considered to be particularly affected by the nose-only exposure method.
서해안 양식장에서 분리한 Vibrio alginolyticus의 특이 bacteriophage에 대한 구조적 특성
허용주 ( Yong Ju Heo ),이찬흔 ( Chan Heun Lee ),백민석 ( Min Suk Baek ),안현미 ( Hyun Mi Ahn ),황요셉 ( Yo Sep Hwang ),박관하 ( Kwan Ha Park ),최상훈 ( Sang Hoon Choi ) 한국어병학회 2012 한국어병학회지 Vol.25 No.3
Vibrio alginolyticus (V. alginolyticus), which is one of bacterial pathogens evoking severe infection in fish and shellfish as well as in human has been found at high frequency around all coast areas in Korea. Both V. alginolyticus and V. alginolyticus specific bacteriophage were isolated from sea water and various fishes from fish farms on west coast in Korea. In a morphological study based on electron microscope, the purified phage appeared to be composed of hexagon head of 60 nm and short tail of 20 nm. In the denatured SDS-PAGE analysis, the structural proteins of the phage were found to be 7 different protein fractions ranging from 37.8 to 198 kda. The kind of nucleic acid of the phage was ascertained to a double stranded DNA.
세대유닛을 적용한 2차측 지역난방의 순환유량에 관한 연구
김용은(Kim Yong-Eun),박병식(Park Byung-Sik),정익희(Jung Ik-Hee),이재용(Lee Jae Yong),임용훈(Im Yong-Hoon),김혁주(Kim Hyouk-Ju),허만기(Heo Man-ki) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
2pipe system and household substation is a method to reduce the heat loss of the pipe lines and manage efficiently. In this study, the proper conditions of circulation flow to adopt household substation was suggested. The experiment was conducted to investigate the characteristics of the household substation. And then annual operation of the 2pipe system with the household substation was simulated and evaluated. To keep the hot water temperature of final users, secondary supply temperature was decided by the result of the experiment and the simulation. Under the conditions which the secondary supply temperature is 50℃ and the temperature drop is less then 3℃, the circulation flow was derived. By using 2pipe system and household substation, annual heat loss was evaluated by approximately 25% reduction against present 4 pipe system.