상악골 전벽골 겸손에 대한 재건술에 있어서 동결건조 콜라겐 매식과 소강판고정술의 임상적 유용성

오승환,장관식,조병호,민승기,이동근,김수남 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

Maxilla is located in midfacial area and has intimate relationship with adjacent anatomical structure such as nasal cavity, orbit, oral cavity, and zygoma. Skeletal defects of maxillary antral wall may be developed by various postoperative causes for comminuted maxillary fractures, tumors of head and neck area or cystic lesions of maxillary sinuses. If these bony defects are left untreated state, this results in several postoperative complications such as soft tissue impingement into bony defects or dysfunction of sinus mucosa. Hence, these defects should be pertinently treated as possible. The main purpose of such surgery is to preservation of normal physiologic function of maxillary sinus. In the past, a variety of materials have been used to reconstruct defects of the maxillary antral wall. Alloplastic materials are popular today because of availability without an additional operation and their ease of use. With favorable results and review of related literatures, we report the availability of lyophilized collagen implantation and microplate fixation as the reconstructive surgical methods on the defects of maxillary anterior wall resulted from various reasons.

중국의 WTO 가입이 광주·전남 지역경제에 미치는 영향에 관한 연구

오진근,백초원,김관선 조선대학교 경영경제연구소 2001 經營經濟硏究 = Management and economics research Vol.24 No.1

가방 끈 변화에 따른 보행동작 분석

김관영,오정환,최대우 忠南大學校體育科學硏究所 2006 體育科學硏究誌 Vol.24 No.1

The purpose of this research lies in examining how school bag strings influence the walking posture of middle school students, so as to prevent their waist and shoulder pains that can be caused by adjusting school bag strings inappropriately and to provide some basic information that can assist in perfect body posture education for them. Subjects with a marker on their body are asked to walk in accordance with the metronome and every subject was recorded and analyzed. The significance level of the data is chosen to be 0.05.(or equivalently, 5%) It is concluded as the following. 1) In contrast to the type D of loose string bag, there are no significant differences in the subject's stride in type B of normal bag string' length and in type C of tight string bag. 2) There is no noticeable difference of the ankle and knee angles according to the length of the bag string when the right heel touches the ground 3) The hip angle while the right heel touching the ground is the smallest in type D of loose string bag. The result as A>C>B>D shows an important effect of bag string on the hip angle. 4) When the right heel touches the ground, the anterioposterior angle of upper body is the most in type D. The result as D>B>C>A shows a noticeable effect of bag string on the angle of inclination 5) There is no significant difference in the angles of ankle, knee, hip and anterioposterior angle of head according to the length of the string when the left toe separates from the ground. 6) At the moment the left toe separates from the ground, the anterioposterior angle of upper body is the most in type D. The result as D>C>B>A shows a significant effect of bag string on it. 7) There is noticeable difference neither in the angles of ankle, knee and hip nor in the angles of anterioposterior angle according to the length of bag string when the left heel touches the ground. 8) At the moment the left heel leaves the ground, the anterioposterior angle of upper body is the most in type D. The result D>C>B>A shows an important effect of the bag string on it. 9) There is no significant difference in the angles of ankle, knee, hip and anterioposterior angle of head according to the length of bag string when the right toe leaves the ground. 10) The anterioposterior angle of upper body is the most at the moment the right toe separates from the ground. The result D>B>C>A shows a noticeable effect of bag string on it.

전기응집에 의한 페수의 크롬 제거

김영관,오미영 대한상하수도학회 2001 상하수도학회지 Vol.15 No.6

This research was carried out to investigate the removal of chromium from wastewater by electrocoagulation. The electrochemical reactor was manufactured to enhance settling of the electro-generated sludge. Aluminum and graphite were used as electrode materials. In the electrochemical reaction of synthetic chromium wastewater using aluminum electrodes, chromium removal increased with both the applied electrical current and retention time. Chromium removal over 90% was obtained and further removal as low as 0.45㎎/ℓ could be attained by successive electrochemical treatment. However, increased residual aluminum concentration in the treated effluent should be considered for the application of the successive treatment scheme. As an anodic material, graphite resulted in a greater chromium removal by enhanced production of H^+ and OH^- which eventually accelerated the precipitation reaction. In the electrochemical treatment of the plating wastewater, some selected heavy metals showed removal efficiencies in the range of 70-94%.

육지한우의 제주지역 적응성 연구 : 1. 육지한우 제주도입시 Theileria sergenti 저항성에 관한 연구

김동철,오운용,김희석,현관종,강영배 濟州大學校 農科大學 動物科學硏究所 1993 動物科學論叢 Vol.8 No.1

This study was conducted to fine the adaptatbility of Korean Native Cattle lacking in the resistance ability to Theileriosis being occured by ticks born parasites in Cheju Island. Data used in this study were collected from none-treated and treated Thpileria sergenti blood vaccine to Korean Native Cattle, Cheju Native Cattle and Cheju Native CattlexBrahman crossbreds during the grazing season in 1988. The parasitemia level of Theileria sergenti in artificial immunized Korean Native Cattle were fewer than none-treated Korean Cattle's, due to immunizing effects. the RBC and PCV reduction were prevented, and average daily gain's 0.25kg in artificial immunized Korean Native Cattle was higher than those of 0.20kg in none-treated. The mortality numbers were one in artificial immunized Korean Native Cattle and four in none-treated Korean Native Cattle. The resistance ability of Theileriosis of Korean Native Cattle was the weakest and Cheju Native Cattle×Brah-man crossbred was the strongest among the breeds.

비만 청소년의 생활습관

김관일,오수일 강원대학교 체육과학연구소 2001 江原大學校附設體育科學硏究所論文集 Vol.- No.24

To find out the life style of the obesity boys and girls, I conducted a survey from 922 boys and girls in the middle school students of C city in K province about their ideas about being obese, their home environment, eating habit, exercise style, and how they spend their free time. By analysing the result, I got the following conclusions. 1.Their ideas about being obese and home environment According to the survey 159 of 922 students (17.25%) were catagorized as being obese and when asked whether they think they're obese, the obesity group showed positive responses. The obesity group had high rates of having their parents as being obese, especially their mothers. 2.Eating habit They usually had more than 3 meals a day but the control group ate more frequently than the obesity group, but the obesity group ate faster. When asked, the time they eat meals and the number of times they eat snacks a day, the control group gave higher respose rate than the obesity group. Usually the control group ate more snacks before going to bed than the obesity group and the obesity group prefered to eat meat. 3.Exercise style Both groups were using their houses and playground near by their house to exercise and the control group premiered soccer as their favorite sport compared to the obesity group. 4.Leisure time Their average sleeping hour was 6-7 hours and the control group slept more than 7 hours showing difference with the obesity group.

국소성 피질이형성증의 외과적 치료

조관국,김형일,이민철,김근수,김연희,정창오,Neto, Pedro R. 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.12

Corticai Dysplasia(CD) is increasingly recognized as a cause of intractable epilepsy since it can be easily diagnosed with high resolution magnetic resonance imaging(MRI). We analyzed 24 consecutive cases with cortical dysplasia who underwent resective surgery at our institute between September. 1992 and December. 1995. MRI was demonstrated to be a decisive tool to identify CD in 16 cases(66.7%). However, the remaining 8 cases(93.9%) were confirmed to have CD based on histological examination. Location of the lesion included temporal(n=9), central(n=5), multilobar(n=5), and frontal(n=5). Intracranial EEG recording was performed to delineate the epileptogenic zons in 16 cases : subdural grid(10 cases) and depth electrode(6 cases). Resection was performed in temporal(n=9), frontal(n=7), central(n=5). parietal(n=1), and muitilobar(n=1). Complete resection was possible in 15(62.5%) and partial resection in 9(37.5%). Histological examination revealed dyslamination of cortical layers only(n=9), additional dysplastic neurons(n=7), and additional balloon cells(n=8). Surgical outcome was graded as seizure free(n=14 : 58.3%), rare seizures(n=3 : 12.5%). <50% reduction of seizure frequency(n=2 : 8%), and no change(n=5 : 20.8%) after mean follow-up of 12.7 months. The most influencing factor on the surgical outcome was the degree of completeness of resection(p<0.05). However. detectability of CD on MRI, severity of histological findings, age of seizure onset, and duration of seizure were not significantly related with the surgical outcome High suspicion is required to detect the CD among the patients with intractable epilepsy and surgical strategies should be well-planned to improve the surgical outcome in the patients with CD.

저압 유기금속화학기상증착법을 이용한 태양전지의 제작 및 특성에 관한 연구

안준오,김성일,정관수 慶熙大學校 材料科學技術硏究所 1994 材料科學技術硏究論集 Vol.7 No.-

We have fabricated various solar cells, such as p-n junction p-AlGaAs/p-GaAs/n-GaAs heteroface and p-GaAs/i-(InGaAs/GaAs)/n-GaAs multi quantum well structure solar cells, which art grown by low-pressure metalorganic chemical vapor deposition(MOCVD). The electrical and structural properities of epitaxial layers have been characterized by Van der Pauw Hall measurement and DCXD(double crystal X-ray diffractometry) measurement. Current - voltage (I-V) characteristics have been investigated by curve trace and light source was tungsten-halogen lamp (34.992 mW/cm^(2)). The conversion efficiency of AlGaAs/GaAs p-p-n heteroface solar cell (V_(∝) : 0.62 V, I : 3.2㎃, efficiency : 10.1%) is greater than the simple p-n junction solar cell (V_(∝) : 0.59 V, I : 2.9 mA, efficiency : 9.1%). In the multi quantum well structure solar cell(p-GaAs/i-(InGaAs/GaAs)/n-GaAs), short circuit current (5.5mA) increased a little.

운동선수의 임장불안에 대한 연구

홍관이,이광재,김두경,부기원,노성규,한상준,박기동,오수일,문병용,이철규,박장평,엄기진,박남환 江原大學校附設 體育科學硏究所 1984 江原大學校附設體育科學硏究所論文集 Vol.- No.9

This study is designed to grasp the elements and situations of stage fright in order to propose a part of ways to cope with it. We make 511 top-class high school players, male and female, in the central districts (Seoul, Inchon, Kyungki, Chungbuk, and Kangweon Province) on object of questionnaire, and get the following results. Through players generally have all-round characters they show weakness in the superiority and emotional stability while showing strength in the sonformity. This fact comes to be related to the elements which cause stage fright. Physiological changes also have many effects on the symptom of stage fright. Especially, stage fright increases when players show sensitive reaction to the self-consciousness of final consequence which comes from the tension or uneasiness of sympathetic nerve, Thus, it turns out that players make use of reducing psychological burden by physical exercise or adjusting the level of demanded result in order to release the stage fright.

데페록사민 전처치가 토끼 심근경색 크기의 감소에 미치는 효과

양관모,오동렬,박승현,박규남,이원재,김형국,황두영,최승필,채장성 대한응급의학회 1998 대한응급의학회지 Vol.9 No.4

Background: Reperfusion of ischemic myocardium has been postulated to result in a specific oxygen radical mediated tissue injury. Iron may liberate during ischemia and we hypothesized that administration of the iron chelator, deferoxamine during ischemia would result in improved recovery after postischemic reperfusion. Purpose: To test whether iron-catalyzed processes contribute to myocardial necrosis during ischemia and reperfusion, deferoxamine was administered to block iron catalyzed hydroxyl radical formation in rabbits. Methods: Eleven rabbits were divided into two groups : control group (n=5) and deferoxamine pretreatment group (n=6). The left circumflex coronay artery was ligated for 30 minutes and reperfused for 180 minutes. Area at risk (AR) was measured by non-stained area with methylene blue injection into left atrium after left circumflex coronary artery ligation. Infarct size was measured by weighing after triphenyltetrazolium chloride staining. Heart rate was measured using electrocardiographic recording and systemic blood pressure was monitored by pressure transducer connected to the catheter in the left ventricle. Results: 1. There was no significant difference of heart rate and blood pressure in deferoxamine pretreatment group compared with control group. 2. There was significant decrease of serum iron concentration after continuous infusion of deferoxamine compared with serum iron concentration before ligation of coronary artery(P<0.05). 3. There was no significant difference of area at risk between control and deferoxamine pretreatment group. 4. Area at necrosis to area at risk was significantly reduced in deferoxamine pretreatment group compared with control group(P<0.05). The results suggest that deferoxamine infusion prior to coronary artery occlusion has a significant benefit in reducing infarct size in this model.