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Ni-Cr-Mo-V강의 템퍼링에 의한 미세구조 변화와 하한계 피로균열진전 특성
신훈,문윤배,김상태,권재도 ( Hoon Shin,Yun Bae Moon,Sang Tae Kim,Jae Do Kwon ) 한국열처리공학회 1997 熱處理工學會誌 Vol.10 No.4
Near-threshold fatigue crack growth characteristics was investigated on the Ni-Cr-Mo-V low alloy steel, which has the different microstructure obtained by tempering at various temperature. The specimens were austenized at 950℃ and then followed by tempering at 200℃, 530℃ and 600℃. Strain rate was obtained from strain gauge attached on the crack tip and crack opening point was observed through load-strain curve. Threshold stress intensity range(ΔK_(th)) was increased with increasing tempering tempuerature, but the effective threshold stress intensity rage(ΔK_(eff.th)) was not affected with the increasing temperature. Grain size increased with increasing tempering temperature.
축소모형주택을 이용한 전통창호의 차음성능에 관한 실험적 연구
신훈,장길수,송민정,Shin, Hoon,Jang, Gil-Soo,Song, Min-Jeong 한국주거학회 2006 한국주거학회 논문집 Vol.17 No.5
This study aims to evaluate the sound insulation performance of Korean traditional paper(Hanji) windows as a material of environmental friendly building. Six types of traditional windows with 4 types of traditional window positions, were installed in l/2.5 scale model house. And then according to KS F 2235, comparative sound level differences between outdoor and indoor were measured. The main results are as follows; 1) TL(Transmission Loss) of Korean traditional paper windows, which cover one eighth of total balcony window, are ranged from 15 to 19 dB(A) in the living room and from 8 to 11 dB(A) in the balcony space. 2) TL of Korean traditional paper windows, which cover one fourth of total balcony window, are ranged from 10 to 19 dB(A) in the living room and from 8 to 10 dB(A) in the balcony space. 3) TL of Korean traditional windows with one side-one layer paper is ranged from 10 to 21 dB(A) and two side-one layer paper is 15 to 23 dB(A) and two side-two layer paper is 19 to 23 dB(A) respectively.
신훈범,안형근,한득영,Shin, Hoon-Beom,Ahn, Hyung-Keun,Han, Deuk-Young 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.9
This paper explains the design and fabrication of an inverter for LCD backlight using a multilayer piezoelectric transformer. That inverter is operated by the burst dimming method whose dimming signal is controlled by the duty ratio of rectangular switching signal to a PWM controller. The brightness of CCFL's are investigated according to the various dimming signals, and when those CCFL's are turned on, the temperature distributions on the piezoelectric transformer and circuit components of the inverter are also investigated by a thermo-camera.
종양 표지 인자로서 혈장 Transforming Growth Factor-β1에 대한 연구
신훈,임창기,최인영,이두연,노동영,류민희,이효석,방영주,박종섭,진승원,Shin, Hoon,Lim, Chang Ki,Choi, In Young,Lee, Doo Yun,Noh, Dong Yong,Ryu, Min Hee,Lee, Hyo Suk,Bang, Yung Jue,Park, Jong Sup,Jin, Seung Won 대한면역학회 2001 Immune Network Vol.1 No.2
Background : Many investigators have found transforming growth factor-${\beta}1$ (TGF-${\beta}1$) to be elevated in tumors. Changes in responsiveness to TGF-${\beta}1$ have been linked to malignant transformation, tumor progression and tumor regression. Many malignant cell lines of epithelial or hematopoietic origin are refractory to the antiproliferative effects of TGF-${\beta}1$. However, a little is known about the association of TGF-${\beta}1$ with progression of malignant tumor. Methods : In this study, we measured the plasma level of TGF-${\beta}1$ in various cancer patients and evaluated the utility of plasma TGF-${\beta}1$ as a possible tumor marker. Plasma TGF-${\beta}1$ levels were measured using enzyme-linked immunosorbent assay in cancer patients and normal controls. Carcinoembryonic antigen (CEA) and alpha-fetoprotein (AFP) as tumor marker were compared with TGF-${\beta}1$ in the aspects of sensitivity and specificity. Results : The mean of plasma TGF-${\beta}1$ levels was $1.219{\pm}0.834ng/ml$ in normal controls, $5.491{\pm}3.598ng/ml$ in breast cancer, $12.670{\pm}10.386ng/ml$ in lung cancer, $5.747{\pm}3.228ng/ml$ in hepatocellular carcinoma and $10.854{\pm}7.996ng/ml$ in cervical cancer. In comparison with CEA and AFP, TGF-${\beta}1$ is more sensitive. Conclusion : We conclude that the high levels of TGF-${\beta}1$ are common in the plasma of cancer patients. These results suggest that the plasma TGF-${\beta}1$ level can be a potent tumor marker in various cancer patients.
신훈,Shin, Hoon 한국기술사회 2001 技術士 Vol.34 No.4
2001년 7월을 기하여 정보통신기반보호법이 발효되고 통신, 전력, 상수도 공항, 철도 정부주요 시설, 제1금융권 등 국가 주요 정보통신 기반시 설에 대해서 정보보호 감리가 의무화된다. 미국의 경우도 유럽의 강화된 정보보호지침에 대응하기 위해 2003년 발효 예정인 세이프 하버법에 대응하기 위한 각 기관, 단체, 기업들의 노력이 가시화되고 있다. 전세계의 정보보호 관련법이 각 자 자국의 이익을 중심으로 제정중인 시점에서 기술 분0티 전문가들이 좀 더 국가의 이익과 공공의 안녕에 부응하는 대응책을 마련하여 국익에 도움이 되는 방향으로 법제도가 운용될 수 있도록 관련법을 숙지해야 할 때이다. 그리고 전체 기술사들이 한마음으로 정치, 경제, 학술 등 각자 맡은 분야에서 분발 할 것을 촉구한다. As of July 1. 2001, the Law of Information 8t Telecommunication Protection has been compulsory to audit protection status on national information and Telecommunications Infra facilities such as communication, electricity, waterworks, airport, railway, primary facilities of government and the first financial circles. In U.S. institutions, organizations and corporations in each field are trying to prepare for Safe Har-bor agreed on Internet privacy regulation between U.S. and Europe to be effective in 2003. The Safe Harbor was motl-vated by strict European standard. Other countries make privacy and information protection law according to their own interest. Therefore Korean technical experts have to develop the law responding to national interest and public welfare. Besides scientific Held, experts in the field of politic, economy and academy also have to work hard to develop the law.
신훈범,이용국,유영한,안형근,한득영,Shin, Hoon-Beom,Lee, Yong-Kuk,Yu, Young-Han,Ahn, Hyung-Keun,Han, Deuk-Young 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.12
In this paper, the equivalent circuit model of a Rosen-type multilayer piezoelectric transformer(MPT) has been proposed based on the Mason's equivalent circuit model and the principle of single layer piezoelectric plate. From the piezoelectric direct and converse effects, the symbolic expressions between the electric inputs and outputs of the MPT have been derived from the equivalent circuit model. A simplified equivalent circuit model of the MPT whose driving part has a single input form has been proposed. The symbolic expressions of the driving part have been derived from the simplified equivalent circuit model and the model was compared with the multi-input equivalent circuit model through the simulation. In the comparisons between the simulation results and the experimental data, output voltage is 630 Vp-p in case of 11-layered MPT and 670 Vp-p for 13-layered MPT over the experiment range. As the load resistance increases, output voltage increases and saturates over $300k{\Omega}$ and the resonant frequency changes from 102 kHz to 103 kHz. The simulation and the experimental results agree well over different load resistances and frequencies.
임상연구 : 위절제술 환자에서 술 후 통증 조절 방법이 Cytokine 반응에 미치는 영향
정찬종 ( Chan Jong Chung ),신훈식 ( Hoon Sik Shin ),김태균 ( Tae Gyun Kim ),최소론 ( So Ron Choi ),진영준 ( Young Jhoon Chin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.4
Background: The postoperative period is associated with the increased production of cytokines, which augments the sensitivity to pain. Epidural analgesia might reduce the postoperative stress response and influence the immune function. This study evaluated the effect of patient-controlled epidural analgesia (PCEA) on the cytokine response, compared with patient-controlled intravenous analgesia (PCTA) in patients undergoing a gastrectomy. Methods: Twenty-nine patients undergoing a gastrectomy were randomly assigned to one of two postoperative pain management techniques: PCTA (fentanyl 15㎍/ml) or PCEA (fentanyl 3㎍/ml in 0.1% ropivacaine). The level of postoperative pain was assessed at rest and during coughing using the visual analog scale (VAS). Blood samples were collected before administering anesthesia and 6, 24, and 48 h after surgery. The plasma concentrations of the tumor necrosis factor (TNF)-α, interleukin (IL)-l β, TL-6, TL-8, TL-lra, TL-l0, and TL-2 were assessed. Results: The patients in the PCEA group showed lower VAS pain scores during the 72 h after surgery, compared with the patients in the PCIA group. There was no change in the levels of TNF-α and IL-2 between the two groups at all times examined. In both groups, the levels of IL-1 β, IL-6, IL-8, IL-1ra, and IL-10 increased after surgery (each group, P < 0.05) but there was no significant differences between the two groups. Conclusions: These results suggest that PCEA has no added influences on the cytokine responses after a gastrectomy. (Korean J Anesthesiol 2006; 51: 443~8)
중심정맥관과 관련하여 미숙아에서 발생한 심장압전 2례 보고
양세령 ( Se Ryung Yang ),신훈범 ( Hoon Bum Shin ),이나미 ( Na Mi Lee ),이대용 ( Dae Yong Yi ),김혜리 ( Hyery Kim ),윤신원 ( Sin Weon Yun ),채수안 ( Soo Ahn Chae ),임인석 ( In Seok Lim ),최응상 ( Eung Sang Choi ) 대한주산의학회 2015 Perinatology Vol.26 No.3
Although central catheter-related complications are frequently reported and are inevitable in the neonatal care unit, the incidence of pericardiac tamponade is low but may be fatal. Index of suspicion, prompt diagnosis, and urgent pericardiocentesis are crucial for lifesaving. We encountered two premature cases of central venous catheter-related pericardial tamponade. The first case was a 4-day-old male premature infant (gestational age [GA], 33+5 weeks; birth weight [BW], 1,864 g), and the second case was a 4-day-old female premature infant (GA, 28+6 week; BW, 1,050 g). Each infant had an indwelling central venous catheter since birth and at the third day of hospitalization. The conditions of the babies suddenly deteriorated, but both babies were successfully resuscitated with urgent echocardiography and prompt pericardiocentesis.