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설정훈,이정희,이종현,권대혁,신장규 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
A porous silicon-based photodiode has been fabricated by selective anodization of Si wafer and deposition of ITO(Indium Tin Oxide) as a transparent electrode. PECVD silicon nitride was deposited for the passivation of the device. The fabricated photodiode shows a very high photo-responsivity of 0.73A/W at 800nm wave length and a rise time of about 8ns at 100Ω load resistance. In order to find out the electrical conduction mechanism in the photodiode, metal/porous silicon Schottky diodes have also been fabricated. Their I-V characteristics are similar to those of p-i-n diodes and amorphous silicon diodes, unlike those of conventional Schottky diodes.
설정훈,신장규,심준환,류인식,이종현 경북대학교 센서기술연구소 1994 센서技術學術大會論文集 Vol.5 No.1
스테인 에칭기법을 이용하여 실리콘의 도핑 농도가 높은 영역을 선택적으로 식각하는 방법을 개발하였다. 이 방법은 양극 반응을 이용한 마이코로머시닝 방법에서와 같이 반응 시편의 뒷면에 전극을 연결하거나 특수한 반응기를 이용해 전류를 공급할 필요성이 없으므로 공정 단계가 간단해지고 표준적인 집적회로 공정에서도 응용될 수 있을 것이다. 또한 양극반응에서는 불가능한 n^(+)/p 구조 시편의 선택적인 식각도 가능하다. 본 연구에서는 스테인 에칭기법을 이용하여 n/n^(+)/n 3층 구조의 시편으로 켈틸레버 및 에어 브릿지 등을 실현하므로써 미세기계구조의 제조 가능성을 확인하였다. We have developed a preferential silicon etching method using stain etching technique. Current supply to the backside contact of silicon wafer and special reactor are not required in this method. Therefore this method is much simpler than anodic reaction method and could be applied to standard VLSI process. In addition, the n^(+) layer in n^(+)/p structure could be preferentially etched by this technique, which could not be implemented by anodic reaction method. We have also fabricated micromechanical structures like cantilevers and air-bridges on the n/n^(+)/n wafer using this stain etching technique.
김동훈,김기권,장태정,김정란,이구,김수근,임현술 大韓法醫學會 2001 대한법의학회지 Vol.25 No.1
Oxygen deficiency has been frequent in a clouted space. Wood consumes oxygen and discharges carbon dioxide Instead of photosynthesis in closed space without light, so do some microorganisms on the surface. We experienced a case that a healthy Insect-proofer fell down and died of asphyxia on stair-board at 7 m below the hatch of the cargo-hold shipping wood Analysis of gases in cargo-hold revealed O2; 12.3%, CO; 105 ppm, CH4; 2.7%, and H2S; 1.9% at 1 m below the hatch, and then O2; 6.1%, CO; 220 ppm, CH4; 2.9%, and H2S, 2.3 ppm at 2.5 m below the hatch. Autopsy findings were unremarkable. We justiced the cause of death asphyxia due to oxygen deficiency. As seen in this case, the serious oxygen deficiency was accounted for oxygen consumption by wood and microorganisms.
Jung Hoon Sul 대한신경손상학회 2022 Korean Journal of Neurotrauma Vol.18 No.1
Diffuse idiopathic skeletal hyperostosis (DISH) is a systemic bone-forming disease, and its pathogenesis remains unknown. Moreover, the incidence of DISH increases with age. DISH may be an age-related disorder that occurs more frequently in degenerative spines than in healthy spines. Most patients with DISH of the cervical spine are asymptomatic; however, mechanical compression of the esophagus by the cervical spine can induce dysphagia, hoarseness, and dyspnea. In most cases, dysphagia progresses slowly. Most cases of postoperative dysphagia after anterior cervical spine surgery occurred within 1 month, and most patients recovered spontaneously. Severe dysphagia is relatively uncommon. Here, we report a case of acute-onset dysphagia with DISH that occurred immediately after anterior cervical discectomy. We should consider the possibility of dysphagia occurring immediately after anterior cervical discectomy in patients with DISH, even in those without dysphagia before surgery. Furthermore, surgical treatment for severe postoperative dysphagia associated with DISH may be a good option.
Distinct Roles of Rodent Orbitofrontal and Medial Prefrontal Cortex in Decision Making
Sul, Jung Hoon,Kim, Hoseok,Huh, Namjung,Lee, Daeyeol,Jung, Min Whan Elsevier 2010 Neuron Vol.66 No.3
<P><B>Summary</B></P><P>We investigated how different subregions of rodent prefrontal cortex contribute to value-based decision making, by comparing neural signals related to animal's choice, its outcome, and action value in orbitofrontal cortex (OFC) and medial prefrontal cortex (mPFC) of rats performing a dynamic two-armed bandit task. Neural signals for upcoming action selection arose in the mPFC, including the anterior cingulate cortex, only immediately before the behavioral manifestation of animal's choice, suggesting that rodent prefrontal cortex is not involved in advanced action planning. Both OFC and mPFC conveyed signals related to the animal's past choices and their outcomes over multiple trials, but neural signals for chosen value and reward prediction error were more prevalent in the OFC. Our results suggest that rodent OFC and mPFC serve distinct roles in value-based decision making and that the OFC plays a prominent role in updating the values of outcomes expected from chosen actions.</P> <P><B>Highlights</B></P><P>► Rat prefrontal cortex does not convey upcoming action selection signals ► Previous choice and outcome signals are broadly distributed in rat prefrontal cortex ► Orbitofrontal cortex encodes both positive and negative reward prediction errors ► Signals needed to update decision-making strategies converge in orbitofrontal cortex</P>
간세포암종 환자에서 간동맥화학색전술 치료 직후 발생한 자발성 세균성 복막염 2예
이정훈 ( Jung Hoon Lee ),손주현 ( Joo Hyun Sohn ),김태엽 ( Tae Yeob Kim ),이지영 ( Ji Young Lee ),장기설 ( Ki Sul Chang ),이동훈 ( Dong Hoon Lee ),박은식 ( Eun Sik Park ) 대한간암학회 2013 대한간암학회지 Vol.13 No.2
Although acute hepatic failure (AHF) after transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma (HCC) is not a rare complication, the development of spontaneous bacterial peritonitis (SBP) is uncommon. We describe two cases who suffered SBP and AHF right after TACE for HCCs. In the first case, 5 days after TACE ascites and jaundice newly developed and SBP was diagnosed at 9 days after TACE. After use of secondary antibiotics (imipenam) due to failure of primary therapy with 3rd cephalosporin, he discharged with resolution of SBP. In the second case, jaundice, abdominal pain and fever developed with increased ascites 3 days after TACE. After 8 days, SBP was diagnosed and treated with imipenam due to primary treatment failure, but clinical course was deteriorated. Eighteen days after discharge, she died of AHF. In patients with increased ascites and fever after TACE, clinician should be considered SBP with AHF among post-TACE complications, and prompt management is needed.
청소년 운동선수들의 동기분위기, 재미 및 운동 몰입 간의 인과관계 검증: 재미의 매개효과
허정훈 ( Jung Hoon Huh ),설정덕 ( Jung Duk Sul ) 한국스포츠심리학회 2011 한국스포츠심리학회지 Vol.22 No.4
본 연구는 청소년 선수들이 지각한 동기 분위기와 재미, 운동 몰입의 인과모형을 검증하는데 그 목적이 있다. 총 738명의 남자 청소년 축구, 농구, 야구 선수들을 대상으로 동기분위기지각, 스포츠 재미, 운동몰입(commitment)검사지로 자료를 수집하였다. 신뢰도와 타당도 검증, 기술통계 및 다변량분석, 이원변량분석과 상관분석을 실시하고, 이론적으로 가설화된 인과모형은 구조방정식 모델로 검증하였다. 나타난 결과 첫째, 청소년 선수들은 경쟁분위기 보다 숙련분위기 지각이 더 높았고, 농구와 야구선수들이 축구선수들보다 숙련분위기 지각이, 야구와 축구 선수들이 농구선수들보다 경쟁분위기 지각이 더 높았다. 둘째, 스포츠 재미는 모든 요인에서 학교급별, 종목 간 차이를 보였고 단지 유능성 지각만 학교급별 차이가 나타나지 않았다. 셋째, 행위몰입은 종목 간 차이가, 인지몰입은 상호작용 효과가 나타났다. 넷째, 숙련 분위기 지각은 운동 재미와 몰입에 정적 상관을, 경쟁분위기지각은 부적 혹은 유의한 상관이 나타나지 않았다. 다섯째, 가설화된 인과모형은 양호한 적합도를 보였다. 숙련분위기 지각은 재미에 정적 영향을, 몰입에는 간접영향을 미쳤으나, 경쟁분위기 지각은 재미에 영향을 미치지 못하고, 몰입에는 부적영향을 미쳤다. 재미는 몰입에 높은 정적영향을 미쳤다. 마지막으로 다집단 분석결과 인과모형은 학교급별(중/고), 종목별(축구/농구/야구) 모든 집단에서 적합하게 나타났다. 이 결과를 토대로 선행연구와 비교하여 이론적, 실증적 논의를 전개하였다. The purpose of this study was to validate a causality model of adolescent players` perceived motivational climate, fun, and commitment. Data were collected from 738 male adolescent players in soccer, basketball, and baseball teams. The reliability and validity tests, MANOVA, two-way ANOVA, correlation tests and SEM were conducted to validate the hypothesized causality model. The results showed that adolescent players had higher scores on the perception of mastery climate than competitive climate. Basketball and baseball players had higher scores on the perception of mastery climate than soccer players, whereas baseball and soccer players had higher scores on the perception of competitive climate than basketball players. Second, there were significant differences on all the factors of sport fun by level of schools and sport types, but there was no significant difference on perception of competence by level of schools. Third, there were significant differences on behavior commitment by sport types and there was interaction effect on cognition commitment. Fourth, the perception of mastery climate was positively associated with sport fun and commitment but the perception of competitive climate didn`t have any or negative association with fun and commitment. Fifth, the hypothesized causality model showed a good fit. The perception of mastery climate had a positive impact on fun and indirect effect on commitment. The perception of competitive climate did not affect fun but affected commitment negatively. Fun had high positive impact on commitment. Finally, multi-group analysis revealed that the causality model was fit for all the groups(high/middle school groups, and sport types).