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미진동 발파용 New KINECKER-II 실용화에 관한 연구
장승호 ( Seung-ho Jang ),박희원 ( Hee-won Park ),임정혁 ( Jung-hyuk Lim ),이창엽 ( Chang-yeop Lee ),안봉도 ( Bong-do Ahn ),강대우 ( Dae-woo Kang ),이하영 ( Ha-young Lee ) 대한화약발파공학회 2017 화약발파 Vol.35 No.1
우리나라는 산지와 구릉지가 전 국토 면적의 70% 이상을 정하고 있어 국토 확장, 고속도로 건설, 지하철공사 등의 대형 토목사업과 도심지 아파트 신축과 재개발, 고층건물 신축 등 부지공사 과정에서 암반굴착이 불가피한 경우가 많다. 이러한 대 · 소형 공사 시 ~ 차질을 받는 경우가 많다. 이에 따라 소음과 지반진동을 감소시키는 발파방법의 적용이 필요하다. 이러한 경우에 적합한 발파방법으로 지금까지 미진동발파, 기계식 굴착공법(할암, Breaker 등), 유사 발파 공법(플라즈마, 겔파쇄 등)이 있다. 본 연구에서는 기존의 미진동 발파에서 사용되고 있는 New KINECKER-I의 순폭성과 배합비 등을 개선하여 경제성 및 시공성을 높인 New KINECKER-II의 특징과 성능을 알아보고 발파진동 추정식을 산출하여 표준 발파패턴 및 시공 방법을 제시하여 사용자의 제품 사용편의를 제공하고자 한다. 또한 연결캡을 사용하여 하나의 뇌관으로 공내 모든 폭약이 순폭됨을 확인하였다. Mountain and hill areas occupy by more than 70% in South Korea and Rock drilling should be applied in order to reduce noisy & vibration from massive civil engineering business such as road expansion, high-way construction, subway construction and construction of site renovation such as a newly-built & re-development of apartment, newly-built of high-rising building in downtown area. As Blasting noise & vibration such as vibration, noise, fly rock etc caused by blasting operation from large ·small scale construction occurs, neighboring residents who demand the compensation file a civil complaint so that the business reach a deadlock. As the excavation method for these areas, There are blasting of micro-vibration, mechanical excavation method(Rock splitter, Breaker etc), similar blasting method(plasma, gel fragmentation etc) to date. In this study, we are trying to find the feature & performance which get improved economic feasibility & construct ability through improving sympathetic detonation of New KINECKER-I used in blasting of micro-vibration & formulation and would provide convenience for use by introducing standard blasting pattern & construction method. Also, checked and confirmed all the blasting with connecting cap has been cleary detonated.
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라디칼 중합을 이용한 폴리스티렌과 브릿지드 폴리실세스퀴옥세인 나노입자와의 유-무기 복합체 제조 및 분석
하태성(Tae-Sung Ha),황인설(In Seol Hwang),방윤혁(Yun-Hyuk Bang),김기영(Ki-Young Kim),임정혁(Jung-Hyurk Lim),김성룡(Sung-Ryong Kim),김경민(Kyung-Min Kim) 한국고분자학회 2016 폴리머 Vol.40 No.6
티올 그룹을 함유한 구형의 브릿지드 폴리실세스퀴옥세인 나노입자(BPS-SH)는 bis[3-(triethoxysilyl)propyl]-disulfide를 암모니아와 알코올 용매 하에서 가수분해와 축합 반응 후 얻어진 브릿지드 폴리실세스퀴옥세인 나노입자(BPS-S-S)의 환원 반응을 통하여 제조하였다. BPS-SH와 triethylene glycol dimethacrylate(TEGDMA)에 365 nm 파장을 가진 UV를 조사하여 TEGDMA 그룹을 함유한 브릿지드 폴리실세스퀴옥세인 나노입자(BPS-TEGDMA)를 얻을 수 있었다. 합성된 BPS 나노입자는 구형의 형태를 띠고, 평균 입자크기는 200-300 nm를 나타내었다. 이렇게 얻어진 BPS-TEGDMA와 스티렌 단량체를 AIBN 개시제 하에서 중합시켜 BPS 나노입자에 폴리스티렌을 성장시킨 새로운 유-무기 복합체(BPS-TEGDMA/PS)를 합성하였다. BPS 나노입자 표면은 폴리스티렌으로 덮여있어 소수성이 증가하는 것을 확인할 수 있었다. 제조된 BPS-TEGDMA/PS의 구조 및 표면 분석은 FTIR, TGA, SEM, TEM과 같은 다양한 분석장비를 이용하여 수행하였다. Bridged polysilsesquioxane (BPS) particles with thiol groups (BPS-SH) were prepared by the reduction of BPS particles with disulfide groups (BPS-S-S) made from hydrolysis and condensation reaction of bis[3-(triethoxysilyl) propyl]-disulfide under ammonia and alcoholic solutions. BPS-SH and triethylene glycol dimethacrylate (TEGDMA) were reacted to synthesize BPS containing TEGDMA group (BPS-TEGDMA) by UV irradiation at 365 nm. BPS-TEGDMA was spherical, and the average size was around 200-300 nm. Hybrid BPS-TEGDMA/PS nanocomposites were fabricated by radical polymerization of BPS-TEGDMA and styrene with AIBN as a radical initiator. The surface of BPS-TEGDMA covered with PS increased the hydrophobicity of BPS nanoparticles. The structure and morphology of BPS-TEGDMA/PS nanocomposites were characterized by infrared spectroscopy (FTIR), thermogravimetric analysis(TGA), scanning electron microscope (SEM), and transmission electron microscope (TEM).
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제왕절개 수술후 경막외강, 지주막하강 및 전신 투여 morphine이 위장관 기능의 회복에 미치는 영향
임정혁,손수창,최세진 충남대학교 의과대학 지역사회의학연구소 1996 충남의대잡지 Vol.23 No.2
Background : This study was designed to evaluate the effect of epidural, intrathecal and intravenous morphine analgesia on the recovery of gastrointestinal function after cesarean section. Methods : Eighty nine patients of ASA I or 2 were classified randomly into 3 groups. Group 1(n=32)received epidural anesthesia with 2% lidocaine and 0.5% bupivacaine, and once in a dose of 4mg morphine immediately after delivery through the epidural catheter. Group 2(n=32) received spinal anesthesia with 0.25% hyperbaric 8.75mg bupivacaine, and 0.25mg morphine and 10㎍ fentanyl at the time that spinal anesthesia was administered. Group 3(n=25) received intravenous morphine after recovery of general anesthesia as a 0.5mg/h background infusion with a lmg bolus and a lockout interval 10min during the first 24 hour. Results : Passing of flatus was noted 48.6±12.1 hours in group 1, 42.2±11.9 hours in group 2, and 50.8±5.9 hours in group 3. There was significant difference between group 2 and group 3(p<0.05).The duration of hospital stay was 94.8±19.7 hours in group 1, 95.7±19.7 hours in group 2 and 100.1±20.7 hours in group 3. Conclusions : Choice of postoperative analgesia may affect the recovery of gastrointestinal function after cesarean section. If convalescence protocols are adjusted to take advantage of the earlier recovery of bowel function, there may be a more shorter hospital stay.
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제왕절개수술후 병원 입원기간에 대한 경막외강, 지주막하강 및 PCA morphine의 효과
최세진,임정혁,손수창 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.2
This study was designed to evaluate the effect of Epidural, intrathecal and PCA morphine analgesia on the length of hospital stay after cesarean section. Eighty nine patients of ASA 1 or 2 were classified randomly into 3 groups. Epidural morphine (group 1, n=32) was given once in a dose of 4mg immediately after delivery. The subarachnoid dose (group 2. n=32) was 0.25mg given at the time that spinal anesthesia was administered. PCA devices was programmed to deliver 1ml(lmg) morphine bolus doses on demand, with a lockout interval of 10 min and with background infusion of 0.5 mg/hr. The results as follows. 1) passing of flatus was noted 48.6±12.1hr. on group 1, 42.2±11.9hr. in group 2, and 50.8±5.9hr. in group 3. there was significant different between group 2 and group 3(p<0.05) 2) The duration of hospital stay was 94.8±19.7hr. in group 1, 95.7±19.7hr. on group 2, and 100.1±20.7hr. in group 3.
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