초음파 기관지 내시경으로 진단한 기관기관지 골연골형성증 1예

이천우,옥철호,정만홍,장태원,임성경,조은주,이신준,이혜원,구상건,천봉권 고신대학교 의과대학 2011 고신대학교 의과대학 학술지 Vol.26 No.2

Tracheobronchopathia osteochondroplastica (TO) is a rare benign disease of unknown etiology characterized by accumulation of calcium phosphate in the submucosa of large airways and benign proliferation of bone and cartilage resulting in nodular formation. We report a case of tracheobronchopathia osteochondroplastica diagnosed by Endobronchial ultrasonography in a 56-year-old man. Chest Computed Tomography revealed thickening of tracheal and bronchial wall, and multiple nodules through whole trachea. Endobronchial ultrasonography showed numerous submucosal nodules with hetero-echogenecity in the third and fourth layers. Histopathological examination revealed nonspecific bronchitis with squamous metaplasia and metaplastic ossification. We confirmed tracheobronchopathia osteochondroplastica. The patient's symptoms were successfully treated with antibiotics and oxygen supplyment. endobronchial ultrasonography can helpful diagnosis in tracheobronchopathia osteochondroplastica.

Alkali 감령처리된 Polyethylene Terepthalate Filament 직물에 나타난 흰얼룩의 원인분석

曺煥,李石榮,許萬宇,鄭元圭 嶺南大學校 工業技術硏究所 1983 연구보고 Vol.11 No.1

A study has been undertaken to know the reason why the white specks appear in the polyethylene terephthalate (PET) filament fabrics which were made alkali weight loss treatment in the dyeing and finishing factories of Taegu area. The results are as follows 1. Main component of the white spects in PET filament fabrics is CaCo₃. 2. The CaCO₃was extracted from the washing water and adhered to the PET filament fabrics during the dyeing and finishing process. 3. When PET filament fabrics were treated with hard water, the warp sizing agent did not dissolve to make specks on dyed fabrics. Then the insoluble sizing agent can not be got rid of by alkali treatment. 4. On account of using Na₂CO₃ in washing PET filament fabrics, white spects also can be appeared.

제 1형 신경섬유종증 환자에서 발생한 위장관 간질종양 1예

원경준,이준,변유미,조민근,한경택,김원,홍란,임성철,김경종,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.2

Gastrointestinal stromal tumor (GIST) is the most common non-epithelial neoplasm arising in the gastrointestinal tract, but this tumor is rarely seen in association with type l neurofibromatosis (NFl) Generally, the majority of GISTs are isolated neoplasm and they are sporadically found in the stomach, but the GISTs in NFl patients are usually multiple and usually found in the small intestine. We report a case of multiple GISTs in the jejunum of a 63-year-old woman diagnosed as NFl accompanied by complication of gastrointestinal bleeding, In this case, Patient had multiple cafe-au lait spots and neurofibroma on skin and had freckling on axilla and groin, and then, we made a diagnosis of NFl. Gastrointestinal bleeding is controlled by resection of multiple GISTs. Generally, only 3-5% of all gastrointestinal bleeding comes from the small bowel. Causes of small intestinal bleeding are angiodysplasia, neoplasm, NSAIDs induced ulcer etc. but, If patients have NFl accompanied by complication of gastrointestinal bleeding, GISTs on small bowel must be considered.

세가지 형상의 부유식 방파제 특성에 대한 비교연구

조원철,한덕만,양우석,이진원 중앙대학교 기술과학연구소 2000 기술과학연구소 논문집 Vol.30 No.-

본 연구는 2차원 유한요소모델을 이용한 부유식 방파제의 파랑감쇠특성에 대한 이론적 연구이다. 유체의 운동은 선형적이고, 2차원적인 포텐셜 흐름으로 가정하고 수치해석을 수행하였으며, 2차원 유한요소해석과 무한요소해석을 채택하여 부유식 방파제 영역에 적용하였다. 따라서 2개의 영역에 있어 방파제 근처 영역에서는 유한요소해석을 적용하였으며, 그 외의 영역에서는 무한요소해석을 사용하였다. 방파제의 형식은 직사각형, 원형, 사다리꼴의 세가지 형상으로 하였으며, 그 결과를 기존의 실험결과와 비교하였다. A theoretical investigation on the wave-attenuation characteristics of floating breakwaters are presented. The fluid motion is idealized as linearized, two dimensional potential flow. A two-dimensional finite element model is adopted to study the performance of floating breakwaters. The near field region surrounding the solid body is modeld using conventional finite elements, however, the far field region is represented appling the infinite elements. Numerical analysis is carried out for floating breakwaters with three different cross-sectional shapes, rectangular, circular and trapezoidal shapes, respectively. Comparison with hydraulic experimental results measured in the past is carried out to prove the validity of the numerical results.

간경변 환자에서 Oro-cecal Transit Time의 측정

원경준,이준,변유미,조민근,조주연,서정균,김영대,박찬국,김만우 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

Background: Neurotransmitter like substances in the gut have been proposed to contribute to the overall portal systemic encephalopathy (PSE). The source of the ammonia in patients with PSE is mainly the small bowel, as a result of the conversion of glutamine in the diet to glutamate and ammonia. PSE is highly responsive to changes in diet, to antibiotic therapy and to ingestion of nondigestible disaccharides such as lactulose. This study was performed to evaluate the relationship between PSE and oro-cecal transit time. In addition, performed to evaluate the effect of severity, cause, complications of liver cirrhosis on oro-cecal transit time. Methods: Between August 2006 and February 2007, 48 cirrhotic patients consecutively was enrolled in study their oro-cecal transit time after informed consent was obtained. A non-invasive hydrogen breath test was used to study oro-cecal transit time (OCTT). Result: The OCTT were delayed in cirrhotic patients with PSE compared without PSE (123.3 ± 42.7 min vs 170.0 ± 58.3 min, p<0.05). OCTT tended to prolongate further as the damage in the liver got worse, nevertheless the result was statistically meaningless (p<0.111). Neither presence of ascites or cause of PSE had any influence on gastrointestinal transit. Conclusions: Cirrhotic patients with PSE have more delayed OCTT than without PSE. Further research is needed to find out the relationship between OCTT and severity of liver cirrhosis.

롤로기어캠의 모델링에 관한 연구

조승래,이춘만,정원지 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.3

In this paper, we developed an automated program for the modeling and emulation of three-dimensional roller gear cam mechanisms. The three-dimensional modeling of a roller-gear cam employs coordinate transformations based on the con-tact condition. The wire frame modeling followed by the shading technique using triangular meshing elements incorporat-ed the "tangent path technique" to reduce the number of data and computational load. Computer simulations for two kinds of products for roller-gear cam mechanism illustrate the relative motion between the modeled roller-gear cam and a turret and thus show the effectiveness of the proposed modeling.

신경인성 방광 1례에 대한 임상고찰

김만호,이지영,이정원,조충식,김철중 대전대학교 한방병원 2002 惠和醫學 Vol.11 No.1

From January 10th 2002 to February 17th 2002, the clinical study was carried out I case of patient in trouble with voiding difficulty such as urinary incontinence, enuresis and urinary frequency after the L₄-L_(5) HN P operation, who had been hospitalised in the Dept. of Internal Medicin e, Cheon-An Oriental Medical Hospital, Daejeon University. The results were as following 1. For this case, we could get the better result using Bo-Joong-lk-Gi-Tang(補中益氣湯) in the treating period. 2. We could get the effective result that the case of voiding difficulty after HNP operation and cerebral infarction by conservative therapy of oriental medicine such as acupuncture, moxibustion and herb medicine.

저온유통용 골판지 포장상사 개발에 관한 연구 (Ⅰ) : 골판지의 흡습특성 시험 Characteristics of moisture absorption to corrugated fiberboard

이원옥,윤홍선,정훈,이현동,조광환,김만수 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3

농산물의 저온저장 및 고습조건에서 안전하게 유통할 수 있는 골판지 포장상자를 개발하기 위하여 원지의 구성, 라이너의 발수도, 골형태의 차이에 따라 수분흡습 특성과 압축강도와의 관계를 구명하기 위해 각각 원지특성을 달리하여 이중 양면 골판지를 재료로 사용하여 시험하였다. 온도변화에 따른 골판지 함수율 변화는 골판지 원지 종류, 발수도 차이등에 관계없이 거의 일정한 값을 나타냈다. 상대습도 변화에 따른 골판지의 함수율 변화는 상대습도에 크게 영향을 받는 것으로 나타났으며 골판지의 수분흡습은 발수도 보다는 원지에 구서에 따라 영향을 많이 받는 것으로 나타났다. 또한 수직압축강도는 상대습도가 증가함을 따라 크게 감소하여 상대습도가 수직압축강도에 미치는 영향이 매우 크며 상대습도가 증가함에 따른 수직압축강도의 저하비율은 골판지의 종류에 관계없이 거의 같은 것으로 나타났다. 따라서 저온고습 조건에서 안전하게 내용물을 보호할 수 있는 저온유통용 농산물 골판지 상자의 개선을 위해서는 고품질 원지의 생산기술 개발 및 골판지 상자의 구조개선 연구가 우선되어야 할 것으로 판단된다. The hardness of corrugated packaging box decreased during storage period because of high humidity. Therefore, the strength-decreasing factor of corrugated packaging box had to be investigated to determine the compression strength of the corrugated packaging box. This study was conducted to define the characteristics of moisture absorption as well as compression strength of corrugated fiberboard. (1) The moisture content of the corrugated fiberboard was rarely influenced by the kinds of raw materials and water repellent. However, the moisture adsorption of the corrugated fiberboard was shown to be clearly affected by air temperature changes. (2) The moisture content of the corrugated fiberboard was significantly affected by relative humidity. The moisture adsorption of corrugated fiberboard was also greatly influenced by composition of raw materials rather than water repellent. The results indicated that the improvement of raw materials was more effective than the increase of water repellent of corrugated fiberboard to reduce the moisture adsorption of the corrugated fiberboard. (3) The vertical compression strength was significantly decreased with increasing relative humidity. The reduction rate of vertical compression strength was not charged with the increase of relative humidity, which was regardless of kinds of corrugated fiberboard. (4) For improving the strength of the corrugated packaging box, new technique should be found to develop better quality of raw materials. Moreover, the physical construction of corrugated packaging box should be clearly understood because the corrugated packaging box for the agricultural products was usually used for the circumstances of high humidity and low air temperature.

방직공장 근로자들의 면폐증에 대한 조사

김정만,조규상,정치경,이원철 가톨릭대학산업의학센타 산업의학연구소 1981 韓國의 産業醫學 Vol.20 No.2

An epidemiological study of byssinosis was carried out by the standard questionnaire in a group of 343 women employed in carding and spinning room, and acute changes of ventilatory function during work shift were measured on Monday in 121 of 343 carders and spinners in a textile mill. Symptoms of byssinosis were found in 13.4% of 67 carders, in 11.6% of 276 spinners. Symptoms of byssinosis had no relation to duration of cotton dust exposure. In 121 carders and spinners forced expiratory volume in 1 second (FEV??) decreased significantly during work on Monday. There were no significant differences of these changes between workers with and without history of byssinosis, and the duration of dust exposure did not affect the decrease of FEV?? on Monday. FEV?? decreased 4.5% during work on Monday whereas maximal mid-expiratory flow (MMF) and maximal expiratory flow at 50% of forced vital capacity(V??) on maximal expiratory flow-volume (MEFV) curve decreased 7.0% and 10.1%. MMF and V?? were more sensitive indices than FEV?? in the detection of acute ventilatory changes caused by cotton dust. The average concentrations of respirable cotton dust (lint-free dust, fibers≤15μin length), measured with vertical elutriator, were 0.220mg/m³in carding room and 0.167mg/m³in spinning room.

Metro optical Ethernet 소프트웨어의 연구

방만원,박종현,이명은,최명선,김명조 木浦大學校 應用科學硏究院 2001 應用科學硏究誌 Vol.1 No.-

본 논문에서는 메트로 옵티컬 이더넷의 소프트웨어 구조에 관한 연구를 위하여 10기가 비트 이더넷 스위치에 적용될 QoS 지원 소프트웨어의 적용성을 자원할당 방식 시그널링 프로토콜인 RSVP와 트래픽 특성에 따라 CoS를 구분하는 DiffServ가 10 기가비트이더넷 스위치에 활용 가능한지를 네트웍크 프로세스 처리 능력과 확장성 측면에서 분석하였다. 결론적으로 RSVP, Diffserv와 802.1p는 구현 및 상혼 연동이 가능하다. 그러나 이것은 기업 내부망으로 한정된다는 단점을 가지고 있다. 일반적으로 중소규모의 특정 기업의 내부망에 위의 기술들을 구현하는 것은 어려움이 없다. 그러나 공중망에서의 적용은 아직까지는 어려움이 많이 존재하며 서비스 제공자간의 연동은 거의 불가능하다. 따라서 이러한 기술들은 End-to-End QoS를 보장하는 것에 목적을 두고 있다.