충격진동 예측방법에 관한 새로운 방법 제안

조규용 ( Kyu Yong Cho ),강추원 ( Choo Won Kang ),고진석 ( Jin Seok Go ) 대한화약발파공학회 2008 화약발파 Vol.26 No.1

건물해체에서 발생하는 충격진동의 예측은 구조물의 낙하높이와 중량, 즉 위치에너지가 고려되어져왔다. 본 연구에서는 충격진동의 예측방법으로써, 위치에너지 대신 낙하중량에 관한 충격량을 이용한 새로운 식을 제시하였다. 실험은 자유낙하를 통해 기존의 방법인 위치에너지와 본 연구에서 제시하는 충격량을 회귀분석결과로 비교 분석하였다. 또한 중첩원리를 이용한 방법도, 즉 거리별 감쇠율, 높이별 자유낙하시차, 붕괴패턴에 따른 지반에 충격을 가하는 시점을 산정함으로써, 기존 건물해체 진동데이터와 동일 조건에서 비교해 보았다. 결론적으로 본 연구에서는, 기존의 충격진동을 예측하는 방법으로써 충격량과 중첩의 원리를 이용한 새로운 방법이 적용되어야 함을 제안하였다. 이러한 결과는 실제 건물해체 시 발생하는 충격진동을 기존의 방법보다 정확하게 예측할 수 있을 거라고 기대할 수 있다. In case of estimating the shocking vibration during the blasting demolitions, the weight and falling height of the structure, that is a potential energy, had been considered. But, this study presented a new equation which used the impulse concerning a falling weight instead of potential energy as a method of predicting the shock vibration. In this experiment, the data of the impulse were compared with the data of the potential energy by performing the free-fall, and all data were comparatively analyzed by the regression analysis method. Also, the method of the superposition theory, which is calculated by the diminution ratio according to distance, the free-fall difference according to height, and the time giving the shock to the ground according to the breakdown pattern, was compared with the previous vibration data occurring from the blasting demolitions in the same conditions. As a result, this study suggests that the impulse and the method of superposition theory be applied as a method of predicting the shocking vibration. Therefore, these results could be expected to estimate the shocking vibration more accurately than the previous method.

선천성 양측성 Sylvius 주위 피질 증후군의 병인론으로서의 뇌회반흔증에 대한 고찰

김한웅,조규용,이민철,김형일,우영종,김명규,Kim, Han-Woong,Cho, Kyu-Yong,Lee, Min-Cheol,Kim, Hyung-Ihl,Woo, Young-Jong,Kim, Myeong-Kyu 대한신경외과학회 2005 Journal of Korean neurosurgical society Vol.37 No.2

Objective: Congenital bilateral perisylvian syndrome(CBPS) has been defined as a characteristic malformative perisylvian polymicrogyria(PMG) in patients with clinical symptoms of pseudobulbar palsy and epileptic seizures. For the present study, we investigate clinicopathologic features of CBPS associated with timing of lesion formation. Methods: Clinicopathologic features of CBPS from 6 patients with surgical resection of the cerebral lesions due to medically intractable seizures were studied. Results: Seizure onset ranged from 1 to 10years (average 6.7years) of age, and average duration of seizure was 23years. All had complex partial seizures, and two patients had additional tonic clonic seizures. Magnetic resonance (MR) images showed polymicrogyria, atropic gyri with gliosis. In the histopathologic examination, the cortical lesions revealed features of ulegyria; atrophic and sclerotic gyri, laminar loss of neurons, extensive lobular gliosis throughout the gray and white matter, neuronoglial nodule formation, and many amyloid bodies. Unlayered or four-layered PMG was not identified. Conclusion: Above data suggest that CBPS might be caused by ulegyria resulting from developmental cortical defect during early fetal stage or acquired hypoxic/ischemic injury in prenatal or postnatal life.

사회복지직 공무원의 직무스트레스, 외상 후 스트레스가 우울에 미치는 영향

박만원(Man-Won Park),조규용(Kyu-Yong Cho),백창환(Chang-Hwan Baek) 한국사회복지행정학회 2013 한국사회복지행정학 Vol.15 No.3

급성 경막하 혈종을 동반한 영아기 Vitamin K 결핍성 출혈성 질환

조규용,정신,오민석 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.10-11

We had experienced 2 cases of acute subdural hematoma due to vitamin K(vit. K) deficiency. They were 44-and 42-day-old. After the adminstration of vit. K₁, prolonged prothrombin time (PT) and activated partial thromboplastin time (APTT) were corrected, so the surgical treatment was performed. We supposed the predisposing factors were breast feeding and unknown hepatic pathology. No complication remained to one infant but the other multiple cerebral infarctions. The etiology, pathogenesis, diagnosis, prevention are discussed. We insist on neonatal administration of vit. K₁for the prevention of bleeding tendency. If intracranial hemorrhage develops, we must keep in mind that early neurosurgical intervention may be needed.

뇌혈관 장해환자의 급성기에 있어서의 혈액응고 장애

조규용,이제혁,우정현 全南大醫大 1986 전남의대학술지 Vol.23 No.3

800m 달리기 後 血壓 및 心博數의 變化와 回復에 관한 硏究 : Concerning Overweight, Normal, and Underweight Students In a Girls' Middle School 女子中學校 肥滿, 正常, 低體重學生을 中心으로

원충희,曺圭勇 公州大學校스포츠科學硏究所 1999 스포츠科學硏究所論文集 Vol.- No.13

The purpose of this study is to observe the recovery of blood pressure and heartbeat rate of overweight, normal, and underweight students after they run 800m race and apply the results to class. To serve this aim, the blood pressure and the heartbeat rate in the normal situation without exercising, immediately, 5, 10, and 15 minutes after 800m race were comparatively analyzed. The subjects were 36 girl students from K-Middle School and they were taken out at random and measured both in the classroom and on the playground. For the athletic load quantity, the blood pressure and heartbeat rate were measured after 800m race without any special training. The data were statistically computerized in the method of SPSS/PC Program and the differences of blood pressure and heartbeat rate in the three groups were verified in the method of a one-way ANOVA. The results obtained from the analysis were as follows. 1. In normal situation, the blood pressure of the overweight students showed 119/71.08㎜Hg, the normal students 118.00/70.08㎜Hg, the underweight students 118.83/74.00㎜Hg, and the heartbeat rate of the overweight students showed 78.17/min., the normal students 79.17/min., the underweight students 77.25/min. As a result, the systolic blood pressure of the overweight students and the normal students were nearly the same, however the underweight students showed a bit lower. The heartbeat rates of three groups were almost the same. 2. Immediately after 800m race, the systolic blood pressure of the overweight students was the highest and that of the normal students was the lowest and there was a little difference between the overweight students and the other two groups, and the diastolic blood pressure was higher than that at resting in all the three groups. And the heartbeat rate showed almost twice the usual. 3. In 5 minutes after 800m race, the systolic blood pressure of the normal students recovered rapidly, the underweight students by 72.62% and the overweight students by 54.14%. The diastolic blood pressure of the underweight students dropped much, and the normality of the other two groups approached that of the resting time. The heartbeat rate of all the groups recovered nearly to that of the resting time. 4. In 10 minutes after 800m race, the systolic blood pressure of the underweight students became completely normal and the overweight students recovered by 67.31%, and the diastolic blood pressure of all the groups recovered normally, The heartbeat rate became normal in order of the underweight, normal, overweight student group. 5. In 15 minutes after 800m race, the systolic blood pressure of overweight students recovered by 81.32%, and the diastolic blood pressure of all the groups showed lower than that at resting. The change of the heartbeat rate became normal in order of the underweight, normal, overweight student group.

호남 지역의 중추 신경계 종양의 현황

윤경식,조규용,김형일,김태영,조경기,신호,강삼석,우정현 대한신경외과학회 1990 Journal of Korean neurosurgical society Vol.19 No.7

The authors analized statistically 635 cases of pathologically confirmed central nervous system tumors in the Chonnam and Chonbuk provinces from 1987 to 1989. The results were as follows : 1) Of the 635 cases, 327 cases(51.5%) were male and 308 cases(48.5%) were female. 2) Intracranial tumors were 518 cases(81.6%), spine and intraspinal tumors 94(14.8%), scalp and skull tumors 23(3.6%). 3) Average incidence rate of tumors was 3.5/year/100,000 population, 3.1 for Chonnam province, 4.4 for Chonbuk province. 4) Among the brain tumors, glial tumors were the most common(28.4%), and followed by meningiomas(18%), pituitary tumors(15.2%), metastatic tumors(8.9%), Among the intraspinal tumors, neurinomas and neurofibromas were found most frequently(41.5%), and rests were metastatic tumors(23.4%), meningiomas(9.5%) in order. 5) Sexual predilection of tumors was as follows : male preponderance was noted for oligodendrogliomas(9: 1), metastatic tumors(2.3:1), glioblastomas multiforme(GM)(1.8:1) cysticercoses(1.6:1), and female preponderance for meningiomas(1:3.2), pituitary tumors(1:2), paragonimiases(1:1.5). 6) The incidence rate of brain tumors in children below 15 years was 11.8% and that which occurred infratentorially was 47.5%. 7) The brain tumors were found mainly in cerebral hemispheres, in which area most of tumors were meningiomas, astrocytomas in order. In sellar, parasellar most of tumors were meningiomas, astrocytomas in order. In sellar, parasellar and suprasellar region, the majority of tumors were pituitary tumors and meningiomas. 8) Cysticercoses showed a predilection for the sixth and seventh decades, meningiomas, metastatic tumors, neurinomas for sixth decade, GM and supratentorial astrocytomas for fourth, fifth and sixth decades, oligodendroliomas for fifth decade, infratentorial astrocytomas, medulloblastomas and craniopharyngiomas for first and second decades. 9) In the spinal tumors, the favorable site was thoracic region and majority of them were located intradural extramedullarily and extradurally in similar incidence.

안구돌출증을 동반한 두피하혈종 : 증례 보고

이백현,정신,조규용,오민석 대한신경외과학회 1991 Journal of Korean neurosurgical society Vol.20 No.6

A case of subgaleal hematoma accompanying ipsilateral exophthalmos is reported. The exophthalmos is due to orbital extension of subgaleal hematoma through potential gap between orbital septum and the lateral horn of the levator palpebral aponeurosis. We must remember that exophthalmos is able to occur after subgaleal hematoma.