성호(星湖)의 한시에 나타난 현실인식

정도상 ( Do Sang Jung ) 근역한문학회 2005 한문학논집(漢文學論集) Vol.23 No.-

전격성 경과를 취한 만성 호산구성 폐렴 환자 1예

윤호상,진춘조,유광하,이상엽,이수인,정상만,김선두,이순제,이길도,전혜정 건국대학교 의과학연구소 2000 건국의과학학술지 Vol.10 No.-

Chronic eosinophilic pneumonia(CEP) is a rare disease of unknown etiology characterized by chronic infiltration of the lung with eosinophils. It presents with profound systemic symptoms comprising fever, night sweats, weight loss, dyspnea and blood eosinophilia with nonsegmental air-space consolidation confined to the outer third of the lung, the "photographic negative of pulmonary edema". Histopathologic features of chronic eosinophilic pneumonia are intraalveolar and interstitial infiltrations with eosinophils, histiocytes, giant cells, scattered lymphocytes and plasma cells. Glucocorticoid therapy cause prompt resolution of symptoms as well as disappearans of blood eosinophils, elevated serum Ig E levels and the roentgenographic lesions. Infrequent radiographic findings include nodular infiltrates, consolidations, cavitations, atelectasis and pleural effusions. Deaths from CEP although rare, have been reported, but the majorities of CEP have benign courses and do not need a therapy with ventilator. We report a case of chronic eosinophilic pneumonia, which had a sudden course associated with diffuse pneumonic consolidations on the both lung and bilateral pleural effusion.

京畿道의 植物相 : 태화산, 화야산, 대부도, 칠현산, 철마산, 검단산

崔道烈,張珍成,金正猷,全正壹,金輝,閔雄基,姜佑昌 서울대학교 수목원 2001 서울大學校 樹木園 硏究報告 Vol.- No.21

This study was conducted in order to explore general flora of the Gyounggi-do Province and to clarify the distribution of some specificated taxa of the Korea. Daebu-do Island, Mt. Taewha, Mt. Hwaya, Mt. Gumdan, Mt. Chilhyun and Mt. Chulma among eighth grade-area of the Degree of Green Naturality (DGN) within the boundary of the Gyounggi-do Province were visited to investigate local flora. The number of identified vascular plant species were as follow; Mt. Hwaya: 120 species (99 genera of 67 families), Mt. Teawha: 132 species (103 genera of 56 families), Daebu-do Island: 124 species (103 genera of 50 families), Mt. Chulma: 129 species (99 genera of 67 families), Mt. Gumdan: 121 species (96 genera of 52 families), Mt. Chilyun: 90 species (74 genera of 42 families). The endemic Clematis brachyura Maxim. was found to distribute Daeby-do. It seemed that plantation was occupying large area in forest of the Gyounggi-do Province. Forty two specificated taxa were identified and 3 taxa, 10 taxa, 5 taxa, and 24 taxa were sorted into forth grade, third grade, second grade, and first grade respectively. Mt. Taewha showed the highest record (16 taxa) in the number of specificated taxa, Mt. Hwaya was the next with 13 taxa. Mt, Chulma (12 taxa), Mt. Gumdan (11 taxa), Daebu-do Island (7 taxi), and Mt, Chylma (4 taxi) followed. Mt. Taewa and Mt. Whaya were found to be relatively higher in the score calculated front the specificated taxa distribution, while Daebu-do Island and Mt. Chilyun were lower, that difference was probably due in part to consequences of severe disturbance of human activities. With respect to the consequences of severe disturbance of human activities. With respect to the geographical proximity to the Gangwon Province, Mt. Hwaya showed higher similarity of the species composition to that of the Mt. Jumbong.

폴리에틸렌의 전화정도에 따른 열분해 특성 변화

정도성,김상채,선우창신,유의연 全南大學校 觸媒硏究所 2003 觸媒硏究 論文集 Vol.24 No.-

Thermogravimetric analysis and pyrolysis experiment were used as studying the effent of conversional level on the thermal degradation of HDPE. The wide conversional range in this work encompassed a change in the degradation mechanism. To accommodate this mechanism change, the data were treated as a pseudo first-order reaction. It was observed that the data conformed to a first-order fit at conversional range of 0.05∼0.98 with an activation energy of 376 kJ/mol. The lower activation energy occurring at lower conversion (0.01∼0.05) is attributed to scission of 'weak links' in macromolecles. The higher activation energy was similar to the carbon-carbon bond dissociation energy and is associated with random scission throughout backbone chain. The lower the conversional level, the more abundant the paraffinic hydrocarbon in product. To what extent this finding are influenced by limitation of terminate reaction of radicals.

스포츠에 의한 중추신경계 손상과 유해 반응에 관한 고찰

정은상,전도선 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The blood-brain barrier is not an absolute barrier to the passage of toxic agents into the CNS, Instead, it represents a site that is less permeable than are most other areas of the body, Nevertheless, many poisons do not readily enter the brain in appreciable quantities because of this barrier. There are four major anatomic and physiological reasons why some toxicants do not readily enter the CNS, First, the capillary endothelial cells of the CNS are tightly joined, leaving few or no pores between the cells, Second, the brain capillary endothelial cells contain an ATP-dependent transporter, the multidrug-resistant (MDR) protein that transports some chemicals into the blood. Third, the capillaries in the CNS are to a large extent surrounded by glial cell processes (astrocytes).

열분해반응을 통한 폴리에틸렌-폴리프로필렌 혼합물의 오일회수 특성

정도성,김상채,유의연 全南大學校 觸媒硏究所 1998 觸媒硏究 論文集 Vol.20 No.-

The thermal degradation of polyethylene, polypropylene alone an their mixture into oil and gas products has been carried out at different reaction conditions. The effect of various parameters such as temperatures, space velocity, mixing ratio on the yield and composition of the oil recovery for these polymers at different reaction temperature. In polyethylene-polypropylene mixtures, the more polypropylene is added, the more rate of degradation of PE and conversion of PE/PP mixture increase at a lower temperature than that of PE alone. It is proposed that this enhancement is due to the free radical from polypropylene, in which can form free radical from polyethylene a lower temperature.

유한요소해석을 통한 iTECH의 전단 성능에 관한 해석적 연구

정재오,김도현,주영규,이재홍,김상대 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Experimental evaluations for the iTECH beam System, which is invented for the purpose of making a lower height in steel structures, have been studied a lot for many years. In addition, they show the possibility of being developed as a new system when the iTECH beam system is applied in construction fields. However, the experiments were carried out without preceding theoretical analyses. Thus, it is intended to supplement some parts of the experiments by analyses and to provide the basis on future studies. iTECH Beam evaluated structural function through moment, shear, joint experiment and proposed formula. While this experiment, shear formula proposed assuming that steel web is all shown similar shear behavior about shear component element. This paper tries to verify assumption for analyzing shear behavior through FEA method.

고효율을 갖는 스위치드 리럭턴스 모터에 관한 연구

정도영,이상호,정의남,심낙순 三陟大學校 産業科學技術硏究所 1999 産業科學技術硏究論文集 Vol.4 No.-

The switched reluctance motor(SRM) has a simple rotor construction with no windings. It also has simple concentrated windings on the stator. Thus, it is expected to be a lower cost machine to manufacture than the squirrel cage induction motor. This paper analyzed the torque of SRM including two different rotor and stator structure according to the phase current. The analyzed SRM are two types, that is, rectangle so called typical type and well-rounded type in SRM. To design and analyze the improved SRM effectively, we used FEM and compared with each other. And we presented the well-rounded type SRM as a high torque SRM. In the point of view of the static torque, instantaneous torque and average torque, the well-rounded type SRM is more improved than that of typical type which has been generally used for SRM.

복막투석복막염 환자에서 발생한 창자벽공기증 1예

정선영,나지훈,최윤정,고성애,조규향,박종원,도준영,윤경우 영남대학교 의과대학 2009 Yeungnam University Journal of Medicine Vol.26 No.1

Peritonitis is a serious problem in patients undergoing peritoneal dialysis. Rarely pneumatosis intestinalis can occur as a complication of this infectious process. Pneumatosis intestinalis is a potential life threatening condition with a challenging management. The mortality of peritoneal dialysis patients with pneumatosis intestinalis secondary to mesenteric ischemia is almost 100%. We describe a rare case of pneumatosis intestinalis in a peritoneal dialysis patient who developed Staphylococcus aureus peritonitis which was initially treated with appropriate antibiotics. Since initial response to therapy was not achieved, an abdominal computerized tomography was done which revealed a pneumatosis intestinalis. A laparotomy was performed and small bowel necrosis was seen. A segmented resection with ileostomy, jejunostomy was done. Though surgical treatment was performed, the patient died in 2 weeks after admission. Pneumocystitis intestinalis in peritoneal dialysis peritonitis is a uncommon complication which requires prompt evaluation to rule out mesenteric ischemia as it carries a high mortality and its management will be surgical.

알고리즘 의존적 임계값 적용방법을 이용한 키 수열 생성 기법

정성용,이재도 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-

As part of efforts to improve the problems of LFSR keystream being weak to periodicity and correlation attacks, research are being increased to generate keystream for stream cyptosystem using features of the chaos signal. However, lacking is the research aimed to generate keystream sufficient the balance and randomness characteristics and analyze the characteristics of ciphertext in the generating of chaos keystream. This paper suggests an algorithm. Thus, as we use the method forapplying the threshold dependent on the algorithm with the problems of arbitrary threshold application improved. The test results confirm that the keystream generated through the suggested algorithm improved its balance and randomness features.