• 한국방사선학회논문지
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• 제11권6호
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• pp.423-428
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• 2017

본 연구에서는 몬테카를로 전산해석법으로 K대학교 진료영상 촬영 실습실의 방사선 조사실과 발생장치 제어실 내부 공간 유효선량률 분포 계산을 수행하였다. 방사선 발생장치는 최대 관전압 150 kVp에 최대 관 전류 700 mA이다. 전산해석 결과를 이용하여 차폐문이 닫힌 경우와 열린 경우의 진료영상 촬영 실습실의 공간선량 분포를 비교 평가하였다. 결과적으로, 차폐문이 열린 경우에도 방사선 발생장치 제어실의 유효선량률은 학생(수시출입자)의 연간 유효선량률 한도(6 mSv/y)를 초과하지 않는다는 것을 알 수 있었다. 하지만, 차폐문이 열려있을 때의 유효선량률이 차폐문이 닫힌 경우에 비해 납유리 앞에서는 약 16배, 차폐문 앞에서는 약 3,000배 더 높기 때문에 실습 중에 차폐문을 닫는 것이 불필요한 방사선 피폭을 크게 줄인다는 것을 알 수 있었다.

• 한국물환경학회지
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• 제33권4호
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• pp.474-480
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• 2017

This study was to estimate the reduction effect of nonpoint source pollutants according to the rainfall intensity and drainage of infiltration grate inlet. Soil infiltration flow was measured on-site and SS load by the filter part was calculated by the experimental data in laboratory reactor test. Soil infiltration flow was measured to be about $1m^3/hr$ in soil condition saturated with water. The filter part of the infiltration grate inlet was a hydraulic equipment unhindered by soil infiltration on the bottom of the storage tank, because the infiltration flow was measured to be about $3m^3/hr$ continuously in the closing infiltration hole condition. Infiltration flow and SS load were over about $1m^3/hr$ and 1.71 kg according to laboratory results by the filter part using the artifical sample. Therefore, the above values could be presented as the limitted value to start the reduction of filtration effect. Reduction efficiencies of SS load by the filter part for the rainfall intensity were about 87 % at 5 mm/hr and about 61 % at 10 mm/hr in consideration of one infiltration grate inlet got the drainage area about $200m^2$. The reduction efficiency of nonpoint source pollutants was very effective in the first flush rainfall. However, the reduction efficiency by rainfall density was higher than by flow.

• 대한치과보철학회지
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• 제36권2호
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• pp.389-423
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• 1998

This investigation was designed to determine the effectiveness of the posterior occlusal schemes on masticatory activity during mastication in complete denture. Twelve edentulous subjects were selected for this study. All subjects had no past history and no functional abnormality on masticatory system and TMjoint. And, they had residual ridge of favorable morphology, firm mucosa and Class I skeletal jaw relationship, Twelve experimental denture with interchangeable occlusions(0-degree teeth, 30-degree teeth, Levin teeth and S-A teeth) were constructed for this study. The masticatory performance was analyzed by means of standard sieve(10, 16, 20, 30sieve), and the electrical activity from selected muscles(Temporalis and Masseter muscle) was recorded simultaneously with electromyography (Bio-Pak system) as the subject masticated test foods (rice, peanut and gum) with four different occlusal schemes. Mandibular movement was, also, measured with Sirognathography(Bio-Pak system). These recordings were performed in immediately, after 1 week and after 2 weeks of insertion of complete denture. The results were as fellows; 1. The average masticatory performance of 0-degree artificial teeth was higher than any other artificial teeth. 2. Masticatory performance in denture wearer was affected preferentially by food and artificial occlusal schemes. 3. During chewing, there was a statistical difference of EMG activity between masseter and temporal muscle(p<0.01). Especially, EMG activity of working masticatory muscle was highly affected by food rather than by artificial occlusal schemes. 4. In denture wearer, the velocity of opening was not affected by food, whereas, the velocity of closing was faster in soft food chewing than in hard food chewing, and the amount of vertical displacement was grater in chewing of soft and large bolus than in chewing of hard and small bolus. However, the amount of lateral displacement showed conversely(p<0.05). 5. It was considered that masticatory performance in denture wearer is not affected by the condition of residual ridge. the history of denture wear, the preference, the adaptation to artificial teeth and the total mesiodistal length of artificial posterior teeth.

• 동의생리병리학회지
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• 제18권1호
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• pp.8-15
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• 2004

Hwangjenegyeng somun. Treatise on the parting and Meeting of Yin-Yang is the theory of the parting and meeting about Yin-Yang. It is harmonized treatise Yin-Yang and systemic constant. Taechung and Gwangmyeng are the concretely applied form of the parting and meeting of Yin-Yang at human body. The parting and Meeting of Three-Yin- Three-Yang has six types symbols of circulated Yin-Yang. They have Six-meeting space structure as match like up-down, backside and front-side, left-side and right-side. These pairs express symbolized meaning of creation of Saeng-jang-shu-chang and also apply the same things. Somum Treatise on the Parting and Meeting of Yin-Yang explains acting of human body by the parting and meeting of Three-yin-three-yang as six structures of Opening-covering-axis of Three-yin-three-yang. This principal is expression of the parting and meeting of Yin-Yang and concretes the opening and closing of circulation process for symmetry by each acting of Three-yin-three-yang. As result. the match of six-meeting in space structure and the Opening-covering-axis of Three-yin-three-yang are the basic principal of oriental medicine about the treatise of Gyeng-Lak and the treatise of Six-Gyeng of Sanghanlon.

• 대한공간정보학회지
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• 제23권2호
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• pp.11-16
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• 2015

일반적으로 상권의 경계는 조사기관의 내부 기준에 따라 현장답사를 실시하고 지역에 따라 시간이 많이 소요될 뿐만 아니라 과학적이지 않다는 문제점을 가지고 있다. 특히, 홍대입구역과 같이 폐점과 개점의 속도가 빠르게 일어나는 지역에 대한 현장답사는 많은 시간과 비용을 필요로 한다. 그럼에도 불구하고, 현장답사 방법은 상권의 경계를 구분할 때 가장 믿을 수 있는 대안으로 여겨지고 있다. 본 연구는 기 구축된 공간정보 데이터를 활용하여 현장답사를 최소화하고 공간통계기법을 활용하여 상권경계를 설정하고자 한다. 서울시 관악구를 연구 지역으로 삼았으며, 공시지가와 유동인구 데이터에 AMOEBA기법을 적용하여 상권의 경계를 확인하였다. 상권의 경계를 구분하기 위해 필지 경계를 활용하였으며 연구의 타당성을 확보하기 위해 현장조사 방법으로 구분된 상권 경계와 비교 하였다.

• 대한본초학회지
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• 제26권3호
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• pp.7-14
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• 2011

Object : This study evaluated the effects of Daeseungkitang(DSK) on cerebral infarct of middle cerebral artery occlusion(MCAO). Method : Sprague-Dawley rats are used for observing to induce cerebral infraction closing its middle cerebral artery temporarily and take DSK by mouth the next 5 days, observe the amount of feces and urine. It is investigated the correlation between them after examining neurological score. Results : It is resulted the below. On the 2nd day of taking DSK, the total amount of feces of the cerebral infarct rats is increased significantly. After taking DSK, the urine volume of the cerebral infarct rats does not change at all. Taking DSK significantly improves neurological score of the cerebral infarct rats. There is a significant correlation between total amount of feces of the cerebral infarct rats and neurological score, otherwise there is no significant correlation between total amount of feces and neurological score which is taken DSK. By taking DSK, the volume of cerebral infarction does not decrease significantly. Taking DSK restrains the expression of iNOS in the cerebral cortex and striatum of the cerebral infarct rats. Taking DSK restrains the expression of MMP-9 in the cerebral cortex of the cerebral infarct rats. Taking DSK restrains the edema of astrocytes of the positive reaction of GFAP in the cerebral cortex of the cerebral infarct rats. Conclusion : According to above results, Daeseungkitang(DSK) is assumed that showing reaction of protecting neuron cell by restraint brain tissue edema thorough controlling water balance.

• 대한감각통합치료학회지
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• 제15권1호
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• pp.1-9
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• 2017

목적 : 본 문헌은 대한감각통합치료학회가 창립 20주년을 맞이하여 개최한 감각통합과 놀이를 연결하는 PLAY inSIde 캠프에 대한 보고이다. 본론 : 캠프의 주요 프로그램은 만 5~6세 발달장애아동을 대상으로 감각통합에 근거를 둔 그룹 활동으로 구성되었다. 캠프는 오프닝 전체 활동 프로그램, 조별 활동 프로그램, 조별 포스트 활동 프로그램, 클로징 전체 활동 프로그램으로 진행되었고, 아동들이 놀이 활동에 참여하는 동안 부모들은 감각통합 부모교육에 참여하였다. 캠프에 참여한 치료사들은 사전 모임과 리허설 시간을 가지며 활동을 계획 및 진행하였고 이 과정에서 치료사들 간의 토의와 서포터의 지원이 있었다. 캠프 후 설문과 토의를 진행 결과, 치료사와 보호자는 캠프 참여에 만족하였고 공동작업을 의미 있게 경험하였다. 결론 : 캠프를 통해 아동들은 다른 아동들과 함께 놀이 활동을 경험하고, 치료사는 다른 치료사들과 전문성을 나누며 교류하고, 학회는 그간 축적된 자원들을 사회에 기여하였다. PLAY inSIde가 초석이 되어 향후 감각통합에 근거를 둔 사회 참여 활동들이 활발해지기를 기대해 본다.

• Tuberculosis and Respiratory Diseases
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• 제72권1호
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• pp.37-43
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• 2012

Background: A lung bulla may rarely shrink as a result of an inflammation within the bulla or a closing of a bronchus involved in the inflammation process, which is termed 'autobullectomy'. The purpose of this study was to describe clinical features of patients with regressions of bullae during follow-up. Methods: We retrospectively reviewed the cases and individuals who showed unequivocal evidence of interval regressions in a pre-existing bulla. A total of 477 cases with a bulla >5 cm in diameter were screened manually. Thirty cases with bullae that showed regression during follow-up were selected. Results: Regressions of large bullae occurred in 30 of 477 cases (6.3%). The median age of those patients was 61 (range, 53~66) years and 87% of those patients were men. The main cause of a bulla was emphysema (80%). Among 30 cases, 16 cases had pneumonia in the lung parenchyma of the peribullous area. Another 7 cases had a regressed bulla accompanied by an air-fluid level within the bulla. The remaining 7 cases showed a spontaneous regression of the bulla without such events. Complete regression of a bulla occurred in 25 cases. A follow-up chest-X ray showed that in all cases except one, the bulla remained in a collapsed state after 24 months. Forced expiratory volume in one second ($FEV_1$) improved in 3 cases and the other 2 cases had increased forced vital capacity (FVC). In addition, total lung capacity (TLC) and residual volume (RV) decreased in another 2 cases. Conclusion: Regression of a lung bulla occurred not only after pneumonia or the presence of air-fluid level within the bulla, but also without such episodes. The clinical course of regression of a lung bulla varied. After regression of a bulla, lung function could be improved in some cases.

• 설비공학논문집
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• 제19권3호
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• pp.269-274
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• 2007

A 3-way valve has been applied to a distributor in a hot-water heating system and the performance of the system was evaluated in view of the variations of pressure drop and flow rate. The 3-way valve has been designed to bypass overplus hot-water when a control valve is closed. Note that the flow goes through heating pipeline in normal operation. In the present study, the measured pressure drops in each part of the flow paths show that the contribution to the total pressure drop is in the order of the supply header with control valves, piping system of each room and return header of the distributor, even though the amount of it is different according to the flow paths. As a result of performance test by sequential closing of the control valves, the variations of pressure drop and flow rate in the distributor with 3-way valves is much lower than those with previous 2-way valves, which prevent noises induced by pressure fluctuations.

• 대한치과교정학회지
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• 제18권1호
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• pp.89-104
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• 1988

This study was performed to investigate the relationships between the EMG activity of the masticatory muscles in Angle's Class II div. 1 malocclusion and normal occlusion. This study was ranged from age 12 to 14 year-old for 30 male subjects: 15 subjects were Angle's Class II div. 1 malocclusion, and 15 subjects were normal occlusion with acceptable profile. Their cephalometric measurement were analyzed, and the EMG recordings from the anterior temporal, posterior temporal, masseter, and orbicularis oris muscles were analyzed during rest position, mastication of peanuts, and swallowing. All data was recorded and statistically processed with the VAX-11/780 computer system. The results were as follows: 1. The activity of muscles at rest was highest in the posterior temporal muscle with normal occlusion, as well as in those with Class II div. 1 malocclusion, and the posterior temporal muscle activity of Class II div. 1 malocclusion was higher than that of normal occlusion. 2. During mastication, all muscle activities of Class II div. 1 malocclusion were recorded lower than those of normal occlusion, and the activity of the anterior temporal muscle was higher than that of the posterior temporal muscle in both types of occlusion. 3. As for the activity in orbicularis oris muscle, it was greater in opening phase than in closing phase during chewing cycle with both types of occlusion. 4. During swallowing, the activities of the anterior temporal, masseter, and orbicularis oris muscles of Class II div. 1 malocclusion were recorded lower than those of normal occlusion.