항공스포츠관련 법 개정에 따른 초경량비행장치 운영에 관한 후속조치 연구

강훈,최종인 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

In the Korean ultra-light flight history, it has been reported a high death toll (3-4 victims a year) although the history of ultra-light plane is less than 15 years since its inception. The mechanic structure of ultra-light plane parallels general passenger planes except for its size (small), speed (slow), and price (low). However, pilots of ultra-light planes have ignored these facts in the use of the planes. They do not take a regular checkup; do illegal remodeling; and make heavy load. This study makes the following suggestions in regards to the flight safety of ultra-light plane. First, this study suggests that there should be regulations on flight weight, amount of fuel, speed limit, test flight rules, the increasing number of ultra-light plane, and reorganization of radio communication. Second, this study suggests that a new flight route connecting ultra-light plane facilities should be constructed and the route should be included in AIP. this study also suggests the creation of airport facility guideline and safety guide. Third, this study suggests a reeducation program for the owners, pilots, and engineers of ultra-light plane. Fourth, this study proposes to set the Ultra-Light Plane Safety Commission in which the government, aviation associations, industry, scholars, and licence holders participate. this study suggests the development of flight insurance and increase of personnel concerning ultra-light plane. This study finally proposes that the domestic aviation industry should develop its own flight at reasonable prices and consider exports to other countries. this study requests that future research should focus on the safety system, and marketing system of ultra-light plane.

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

밀링가공에서의 온도분포와 절삭력 예측을 위한 연구

강재훈,송준엽,박종권 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

This paper presents a simple analytic method using 2D simulation program for predications of cutting force and machining temperature in dry type milling process. And also, comparison of cutting force and machining temperature obtained from experiment and simulation work is accomplished to distinguish of suitability.

기관지천식 환자에서 Furosemide, Disodium cromoglycate 및 Heparin 흡입이 고장액 식염수 기관지유발검사에 미치는 영향

강천일,현상훈,남언정,김건우,윤종수,서영익,이종명,김능수 慶北大學校 醫科大學 1996 慶北醫大誌 Vol.37 No.3

목적 : 기관지천식 환자에서 고장액 식염수의 흡입은 기도수축을 유발할 수 있으며 이는 운동유발성 천식반응과 밀접한 관계가 있는 것으로 알려져 있다. 저자들은 알레르겐 흡입이나 운동에 의해 유발되는 천식에 예방효과가 있는 것으로 알려진 disodium cromoglycate(DSCG), furosemide 및 heparin 흡입이 4.5% NaCl 기관지유발검사(BPT)에 미치는 영향을 조사하였다. 대상 및 방법 : 4.5% NaCl BPT에서 양성반응을 보이는 기관지천식 환자 13명을 대상으로 하였으며 사용된 약물은 furosemide 40㎎, DSCG 40㎎ 및 heparin 1,000μ/㎏이었다. 먼저baseline 4.5% NaCl BPT를 시행한 다음 이들 약물로 전처치후 다시 4.5% NaCl BPT를 시행하여 약물의 효과를 관찰하였다. 결과 : Furosemide 40㎎, DSCG 40㎎및 heparin 1,000μ/㎏의 흡입 전처치는 고장액 식염수에 의한 기도수축 반응에 뚜렷한 예방효과를 보였다. Furosemide와 DSCG로 전처치한 군(n=6)에서 이들의 기도수축 방어율은 각각 100.6±6.6%, 91.1±17.2%였으며 furosemide와 heparin으로 전처치한 군(n=7)에서는 각각 58.7±29.2%, 59.0±51.1%로서 각 군에서 이들 약제간의 방어율에는 유의한 차이가 없었다. 결론 : Furosemide(40㎎), DSCG(40㎎) 및 heparin(1000μ/㎏)의 흡입 전처치는 고장액 식염수에 의한 기도수축 반응에 뚜렷한 예방효과를 보였으며, 적어도 이 용량에서 기도수축 예방 정도에는 유의한 차이가 없음을 알 수 있었다. Background: Hypertonic saline (4.5% NaCl) inhalation is known to induce broncho-constriction by affecting mast cell, epithelial cell and vagal afferent pathway in some asthmatics. Disodium cromoglycate (DSCG) is known to have a preventive effect on allergic asthma and exercise induced asthma, and recently it was reported that furosemide and heparin had similar effect. The purpose of this study was to evaluate the effects of furosemide, DSCG and heparin on hypertonic saline provocation test in asthmatics. Methods: Thirteen asthmatics with a positive response to hypertonic saline challenge were enrolled. Hypertonic saline and test drugs were generated by ultrasonic nebulizer. After taking baseline 4.5% NaCl challenge, subjects were rechallenged with 4.5% NaCl after inhalation of furosemide 40㎎, DSCG 40㎎ or heparin 1,000μ/㎏. Results: 1. There was a significant positive relationship between PC_20-methacholine and PTM-4.5% NaCl(r=0.5575, p = 0.024). 2. Furosemide, DSCG and heparin had no direct bronchodilating effects. 3. Premedication of furosemide and DSCG(n=6) showed significant protective effects on 4.5% NaCl induced broncho-constriction. The average protection rate were 100.6±6.6% and 91.1±17.2%, respectively. 4. Premedication of furosemide and heparin(n=7) showed significant protective effects on 4.5% NaCl induced broncho-constriction. The average protection rate were 58.7±29.2% and 59.0±51.1%. respectively. Conclusions: Furosemide(40㎎), DSCG(40㎎) and heparin(1.000μ/㎏) had significant protective effects on hypertonic saline induced broncho-constriction in asthmatics, and there were no significant differences in their potency of protection rate.

개에서 디스템퍼 바이러스와 톡소플라즈마의 혼합 감염

강홍원,강상철,양형석,배종희,김재훈 한국임상수의학회 2004 한국임상수의학회지 Vol.21 No.1

A 3 month-old male dog with clinical signs of anorexia, soft stool, ocular and nasal discharge, cough and respiratory distress was submitted to the Cheju National University for diagnosis. At necropsy, tan to purple-red sublobar to lobar consolidations were presented in apical and cardiac lobe of lung. Histopathologically, severe diffuse bronchointerstitial pneumonia with necrotic bronchiolitis was noted in the lung. The demyelinating encephalitis and astrocytosis were presented in cerebellum and cerebrum. Numerous round, ovoid or cluster of tachyzoites were also identified in alveolar lumen, alveolar wall and cytoplasm of macrophages in the lung. The orgasnisms were demonstrated as Toxoplasma (T) gondii by immunohistochemistry. Intranuclear or intracytoplasmic eosinophilic inclusion bodies were seen in the glial cells of the cerebellum. Canine distemper virus (CDV) specific antigens were demonstrated in the cerebellum by the immunohistochemistry. In our knowledge, this is believed to be the first confirmed report of co-infection of CDV and T gondii in dog in Korea.

백제의 성장과 對中國郡縣 관계의 추이 : 『삼국사기』 백제본기 초기기록의 '樂浪' 관련 기사의 검토를 겸하여

강종훈 한국고대사학회 2004 韓國古代史硏究 Vol.34 No.-

Baekche, one of the three ancient Korean kingdoms was located in the central area of the Korean Peninsula. It kept very close relationship with its neighboring Chinese Counties from the beginning. In 313, Lolang(樂浪) and Daifang(帶方) were conquered by Koguryo. Many immigrants from Lolang and Daifang came down to Baekche. They made great contributions to its development. In 373, King Geunchogo of Baekche dispatched the envoy to East Chin (東晉) of Southern China, and was appointed as the governor of Lolang by the Emperor of China. Thereafter the friendly relation between Baekche and the dynasties of Southern China was more promoted.

4세기 백제의 遼西 지역 진출과 그 배경

강종훈 한국고대사학회 2003 韓國古代史硏究 Vol.30 No.-

In Songshu and Liangshu, the old chronicles of China, there are some articles telling that the troops of Baekje attacked and occupied Liaoxi of China in the 4th century. Many questions have been thrown out on whether it was true or false. Through close examination on the articles, I have reached the conclusion that it was true. Baekje sent its army to Liaoxi in the year 385 and established the military rulership there. At that time, Yu Yan(餘巖), one of the descendents of the king Dongmyung, the founder of Puyu, rebelled against Hou-yan and attacked Liaoxi. Baekje's occupation over Liaoxi hi thought to have been deeply associated with Yu-yan's uprising. And Baekje's overseas dispatch of troops is assumed to have been activated by the request of Dong-jin, which was dreaming of recovery of its lost territory in the northern China. King Chim-nyu of Baekje was also the governor of Le-Iang county of Dong-jin. Perhaps he himself went over to Liaoxi with his army, and was killed by Murong Nong, the Commander in Chief of Hou-yan's army on November in 385. Baekje's occupation over Liaoxi ended in failure. But it made so many impressions on the ruling class of the southern Chinese kingdoms, such as Dong-jin, Song, and Liang that they wrote it at the beginning of the articles concerning Baekje in most of their chronicles.

레이저와 2차원 배열의 광전검출기를 이용한 구조물의 변위측정 시스템의 개발에 관한 연구

강문필,이진이,김민수,김대정,최원하,강기훈,김종수,김훈 한국비파괴검사학회 2002 한국비파괴검사학회지 Vol.22 No.1

일반적으로 구조물은 외부의 정적 및 동적 하중과 외부환경으로 인하여 피로균열과 부식이 발생하며, 이것은 구조물의 변형을 유발하여 결국 파단으로 이어지기 때문에 균열과 부식의 검출 및 평가와 함께 구조물의 변형에 의한 진동, 변위 기울기와 같은 거동을 감시하는 것도 매우 중요하다. 이에 레이저 센서 시스템을 이용하여 이러한 거동을 측정하여 이상 유무를 모니터링할 수 있는 구조물 안전감시 시스템을 개발하였다. 본 시스템은 2차원으로 배열한 광전센서를 이용하여 구조물의 변형에 의해 유발된 광궤적의 변화를 감시하며 또한 데이터를 취득하고 신호처리 할 수 있는 운용 프로그램도 갖추고 있다. 본 연구에서는 개발한 안전 진단 시스템의 필드 적용에 앞서 실험실에서의 몇 가지 실험을 통하여 그 효용성을 검증하였다. A Safety Monitoring System using a laser and 2-D arrayed photo sensors is developed. To monitor of the deformation and small rotation of structure the developed optical system using 2-D photo sensor array was used to detect the variation of optical orbit of laser which was induced by deformation of the structure. Also, an operating program to manage the system and an algorithm for the data acquisition and the database are introduced. In this study, we demonstrated the capabilities of this system by laboratory experiments before applying the system to the field.

치조열 환자에서의 치아형태이상, 결혼치 및 위치이상에 대한 임상적 연구

강진한,최진영,이종호,정필훈,김명진 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.5

Until recent time many studies for relationship of dental abnormalities and cleft lip and palate were reported, higher prevalence of abnormality was revealed. The patients with large cleft size had significantly more missing teeth than patients with small cleft size. The tooth that is most usually missed in normal population is the mandibular second premolar, followed by the maxillary lateral incisor and the upper second premolar. The aim of this study was to analyse the prevalence of dental abnormalities and ectopic eruption in patients with cleft alveolus visiting our hospital. Radiographs, dental cast and records from about 60 patients were analysed to find the relation of missing, malformed, malpositioned tooth and delayed eruption and cleft site.

유전자 재조합 인간 성장호르몬(rhGH)이 NK 세포의 활성에 미치는 영향

강창랑,김종덕,류훈,정헌택 大韓免疫學會 1996 大韓免疫學會誌 Vol.18 No.4

To evaluate the acute effect of recombinant human growth hormone(rhGH) on the activity of natural killer(NK) cell in children, we selected 6 patients of growth hormone deficient and 5 normal control children. In both groups, 0.15 IU/kg of rhGH was administered subcutaneously. The plasma growth hormone level were measured by radioimmunoassay on 0, 2, and 6 hours after administration of rhGH. To determine NK cell activity, peripheral blood mononuclear cell were separated by Ficoll-Hypaque gradient sedimentation. After this, varying concentration of viable effector cells in complete medium were added to duplicate culture of target cells(the human erythroleukemia cell line, K562) and we measured the LDH released from the cytosol into 16 hours culture medium. The average paasma level of growth hormone of growth hormone deficient and normal group were increased to the level of 41.6±23.7 and 96.3±46.5 ng/ml 2 hours after rhGH injection respectively and decreased to the level of 18.510.6 and 42.2± 5.5 ng/ ml 6 hours after rhGH injection respectively. In 16 hours_ culture medium, percent cytotoxicity of NK cell was significantly increased in the blood samples of control groups. It seemed that administration of the rhGH do not made a any effects acutely on NK cell activity in growth hormone deficient group. But in a normal control children, external administration of growth hormone increased percent cytotoxicity of NK cell activity.