발파공내 충진매질에 따른 발파 효율성에 관한 연구

강희섭,방명석,이상헌,안용수 대한안전경영과학회 2016 대한안전경영과학회 학술대회논문집 Vol.2016 No.04

The blast hole has a space between explosive and hole wall, and blast forces reaches the hole wall face with a large amount of loss during passing through this space. The loss ratio of blasting forces are different to this packing material of space like air, water, etc. In this study, the effect of packing materials is investigated by the numerical simulation analysis. The simulation is carried out to two phases; 1st phase is to compute the impacting forces reaching on the wall face passing through packing materials(air, water), 2nd phase is to study the blasting effect(block size of cracking, direction of driving forces, etc.) in real site. The reaching force at the wall face in the water is larger than in the air. This study shows that the water as packing materials is superior to the air.

사랑의 손길이 모인 작은 사랑회

강희섭 인구보건복지협회 2000 가정의벗 Vol.33 No.5

자동차 Window Tinting의 농도가 야간 운전자의 후방시각에 미치는 영향 연구

강희섭,김성원,윤영수,김인수,박성하 대한인간공학회 2006 대한인간공학회 학술대회논문집 Vol.- No.-

자동차유리에 색깔이 있는 필름을 부착하는 선팅(Window tinting)은 눈부심을 방지하고 자외선을 차단하며 외관을 꾸미기 위해 대부분의 운전자들이 부착 하고 있다. 그러나 차량을 이용한 범죄 등을 막으려면 규정 이상의 선팅을 단속해야 한다는 선팅 단속을 둘러 싼 논란이 제기 되고 있다. 본 연구의 목적은 도로교통법상 선팅 규제조항을 알아 보고 최근 사회 문제가 되고 있는 선팅이 교통안전 관점에서 야간 운전자의 후방시각에 어떠한 영향을 주는지를 검토하고 정량화하기 위해 수행하였다. 이를 위해 차광필름의 농도에 따른 운전자의 후방물체 식별능력을 로지스틱 회귀분석(Logistic regression)방법을 이용하여 분석하였다. 분석결과, 어두운 야간 환경에서 선팅은 운전자의 후방물체 식별능력을 유의하게 저하시키며, 결과적으로 신호대기 상태나 주차상황에서 사고의 위험을 증가시킬 수 있음을 알 수 있었다. 향후 성별, 나이, 차량의 후시경 종류 등의 차이를 고려한 연구가 이루어 진다면 자동차 유리창 선팅의 안전성과 단속의 기준을 설정하는데 유용하게 이용할 수 있을 것으로 기대된다.

Lenzites betulina L.의 Phytohemoagglutinin에 關한 硏究

康熙涉 고려대학교 의과대학 1973 고려대학교 의과대학 잡지 Vol.10 No.3

WTB공법과 일반발파공법의 환경안전성 비교 분석 연구

강희섭,방명석,이상헌,안용수 대한안전경영과학회 2016 대한안전경영과학회 학술대회논문집 Vol.2016 No.04

In the blast work inevitably exists a vacant space between drilling hole wall and explosive. So it cause an blast inefficiency called on a decoupling effect. In this study, For enhancing the detonation efficiency and reducing the environmental problem(vibration, noise, etc.), water is used to fill the vacant space. Water filling has many advantages such as efficiency, low price and workability. In the comparison analysis the field test is carried out. It result on an aspect of the effectiveness and safety. The result measured in the field is as follows; First, the water tube blast reduces the vibration by 16.5% and lessen the noise by 1% comparing to general blast. Secondly, water tube blast makes a separation distance shortened by maximum 15m. Thirdly, in the case that the same quantities of explosive are used, the amount of crushing per hole increased by about 12.8% in water blast method. The quantity of the explosive is reduced by about 11.4% comparing with general blast.

아시아 최고 높이의 주거 건축물 부산 해운대 위브더제니스 기초공사 적용기술 - 두산건설(주)

강희섭,이병훈,황인진,Gang, Hui-Seop,Lee, Byeong-Hun,Hwang, In-Jin 한국건축시공학회 2008 한국건축시공학회지 Vol.8 No.6

Lenzites betulina L.의 Phytohemoagglutinin에 關한 硏究

康熙涉,文國鎭 고려대학교 의과대학 1973 고려대 의대 잡지 Vol.10 No.3

The author studied 23 kinds of saline extract of mushrooms native to Korea on its agglutinating activity with human RBC. Among them, Lenzites betulina L. (LBL) was found to have phytohemoagglutinin activity and studied on its agglutination titer, absorption test with human RBC, agglutination inhibition test with human saliva and various sugars, heat stability salting Out test, sperm agglutination test and triple bond reaction. The results could be summarized as follows : 1. Anti B-lectin was found in LBL 2. Anti B-lectin in LBL was absorbed by same group's BBC and saliva of secretors. 3. The agglutinating titers of anti B-lectin in LBL were 1:32 with group B RBC and 1:16 with group AB RBC. 4. The anti B-lectin was contained in precipitates of LBL treated by ammonium sulfate in concentration of 50% saturation. 5. The agglutination activity of anti LBL was inhibited by L-fucose, D-fucose, D-galactose, lactose and D-melibiose. 6. The human sperms were not agglutinated by PHA in LBL. 7. It was possible to detect blood type of "B" group in the blood stains and various humoral stains by triple bond test with anti-B lectin in LBL.

공내 매질이 구조물의 발파이격거리에 미치는 영향에 관한 연구

강희섭,정중규,방명석 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 논문집 Vol.21 No.1

최근에 도시화와 산업화 및 교통망의 지속적인 확보로 인하여 발파공사를 시행하는 공사장이 증가하고 있다. 발파공사는 주변 주 민들의 주거환경과 인접시설물들의 안전에 큰 영향을 미치므로 이에 대한 대책이 필요하다. 본 연구에서는 발파피해를 줄이기 위한 방법 중에 서 발파공내의 발파메커니즘을 규명하고 개선하였다. 일반적인 공법에서 발생하는 천공경과 폭약경 사이의 차이로 인한 공간에서 디커플링효 과를 규명하고, 이 공간의 매질을 변화시킴으로서 발파 시 진동발생의 규모를 규명하였다. 발파시험은 도로, 철도, 산업단지에서 실시하고, 발 파진동을 측정하였다. 측정된 진동속도를 회귀분석하여 발파진동추정식을 산정하고 이를 이용하여 이격거리를 산정하였다. 공내 매질이 공 기보다는 물처럼 비중이 큰 경우에 충격력은 크나 폭발 지연시간이 짧아 진동전달거리가 작아 이격거리를 크게 확보할 수 있다. 핵심용어 : Because of urbanization, Industrialization and expansion of transportation network, blasting works are recently increasing in construction field. The blasting work influences environmental effects to residents and the safety of facilities around the working place, so the development of blasting technology is needed to reduce the damage to residents. The blasting mechanism in the hole was studied and tested in the blasting sites by the difference of diameter between explosives and drilling hole, which is named by the decoupling effect. This effect was tested by changing the medium between explosives and hole wall in three working sites(railway, highway and industrial complex). The vibration velocity of blasting was recorded and vibration equations were produced by regression analyses. Finally, the structure separation distance was derived using these equations. The testing results show that the specific gravity of medium is larger, the separation distance is smaller and the duration time of blasting is shorter in case of large specific gravity of medium, so the vibration effect stops more fastly in the water compared with the air.

一部都市地域 女性의 月經에 關한 調査硏究

康熙涉 서울大學校 保健大學院 1971 公衆保健雜誌 Vol.8 No.1

A detailed survey was conducted towards 2,855 women (middle & high school students; 782, college students; 592, bus girls; 426, factory workers; 633, and married women 426, etc.) on factors related to menstruation. The servey was conducted during September 1-November 30, 1970. The following conclusions were obtained from the study: A. Knowledge about menstruation 1. The knowledge about menstruation before menstruation was reported by 82.8 per cent of all women surveyed. 2. Source of information about menstruation. The college students and the middle and high school students reported school education as the main source of knowledge about menstruation, the percentages being 46.2 and 35.7 respectively. The bus-girls and the married women learned of it from parents, the percentage bring 34.6 and 38.0 respectively. The factory workers learned from school education, the percentage was 44.5 per cent. 3. Shyness after first menstruation Of those who responded to the survey 75.6 per cent (college students; 66.5 per cent, middle or high school students;78.0 per cent, bus-girls; 81.4 per cent factory workers; 70.2 per cent and eligible women; 81.5 per cent) reported having been shocked at first menstruation. About 12 per cent reported of no mental or emotional disturbance. B. Age of menarche 1. Age of menarche The average age of menarche was 14.4 years. The earliest age of menarche was 11 and the latest age 23. The college students the age of menarche for college students was 13.3 years, that of the middle or high school student was 13.2 years that of the bus-girl 14.7 years, the factory worker 16.1 years, and the married women 16.8 years. 2. By living standard, the women from "wealthy" families the age of menarche was lowest and it was low with women under "different" parents. Also, those reporting of personal hobbies such as music, physical culture, reading and thinking reported advent of an early menarche. C. Menstruation 1. For six months after the age of menarche, 46.6 per cent of the students had normal menstruation, and 53.4 per cent of them had abnormal ones. Of the women with abnormal menstruation 19.7 pre cent had no menstruation for one month of three months, 18.8 per cent had abnormal menstruation from time to time, 8.6 per cent had no menstruation for more than six months. Most women to have normal menstruations a few months after the menarche. 2. At the time of interviews, 69.1 per cent of the women (1946) had normal menstruation, and 30.9 per cent had menstruation every 30 days, 28.8 per cent every four weeks. The average cycle of menstruation was 28.1 days. D. Duration of menstruation In 32.4 per cent of the total investigated duration of menstruation was 5 days, in 30.7 per cent 4 days, and in 16.6 per cent three days. The duration of menstruation ranged from 1 days to 8 days with an average of 4.5 days. E. Quantity of menstruation Out of the total 59.2 per cent had "medium" amount of menstruation, 22.2 per cent had "profuse" amount of menstruation, and 16.3 per cent "small" amount. F. Symptoms acompanying menstruation Out of the total 86.2 per cent had some pains, while 13.8 per cent had symptoms. Among the symptoms, abdominal pain occupied 34.6 per cent, Lumbago 25.1 percent, neuroligical conditions 19.5 per cent and pain 3.1 per cent.

一部都市地域 女性의 月經에 關한 調査硏究

康熙涉(Hee Sub Kang) 서울대학교 보건환경연구소 1971 보건학논집 Vol.8 No.1