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임세훈 ( Se Hoon Lim ),송병흠 ( Byung Heum Song ) 한국항공운항학회 2009 한국항공운항학회지 Vol.17 No.1
This paper presents results from field studies carried out to monitor off-target droplet movement of endosulfan insecticide applied to the Korea chestnut tree area. As a results, mean airborne drift values were recorded 25m as average from downwind of a single flight line(sample line) in mountain terrain and mean effective swath width was recorded 19.5m as average in a plain. In terms of characteristics of geography of Korea aerial application is mainly carried out in mountain terrain. The equipment, weather conditions, and appropriate aerial spray technic are required for effective aerial application. In particular, the pilot can get effective results when he only sprays with consideration of environment factors since there is much turbulence in mountain terrain. Eventually, the most effective factor of droplets drift is to estimate the local weather conditions exactly.
국내 회전익 항공기 사고율 분석 및 사고의 잠재적 조건에 관한 연구
유태정,김칠영,임세훈,Yu, Tae-Jung,Kim, Chil-Young,Lim, Se-Hoon 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.4
There were a total of 65 accidents of helicopers between 1990 and 2013. The overall accidents rate has remained around 8 accidents per 100,000 flight hours, and the fatal rate has stayed at about 8 accidents per 100,000 flight hours. In this study, we conduct a series of statistical analyses to investigate the significance of latent failure of groups that operate the helicopter. Analysis of variance demonstrated significant differences in the latent condition score for the 3 groups, with the lower accidents rate groups reporting better scores of latent condition. Results indicated that there are the significant differences of latent condition in accidents between groups of high accidents rate and groups of low accidents rate.
떨림과 경직이 발생한 척추수술후증후군 환자에서 척수자극술에 의한 치료 경험 -증례 보고-
김영재,김명훈,임세훈,이정한,이근무,정순호,최영균,신치만,Kim, Young Jae,Kim, Myoung Hun,Lim, Se Hoon,Lee, Jeong Han,Lee, Kun Moo,Cheong, Soon Ho,Choe, Young Kyun,Shin, Chee Mahn 대한통증학회 2006 The Korean Journal of Pain Vol.19 No.1
Tremor is a rhythmic, involuntary and oscillatory movement of body parts, and it is the most common movement disorder. Spasticity is also one of the movement disorders that is commonly accompanied with Complex Regional Pain Syndrome; however, the basic nature of spasticity has not yet been proved. A 25-year-old male patient had two operations and he was being treated because of a back injury that occurred 4 years ago. He suffered from pain, tremor and spasticity on both his lower legs, and his symptoms were diagnosed as failed back surgery syndrome. The tremor and spasticity were aggravated despite of continuous treatments. We then treated him with spinal cord stimulation. His pain, tremor and spasticity disappeared after spinal cord stimulation.
전제형,송제환,정창재,임세훈,송병흠,Jeon, Je-hyung,Song, Jehwan,Jung, Chang-jae,Lim, se-hoon,Song, Byung-Heum 한국항공운항학회 2018 한국항공운항학회지 Vol.26 No.3
Aviation industry is growing rapidly, and this growth is expected to continue. However, aircraft accident rate is still high, and 65 percent of accidents occur during landing phase due to unstable approach. Therefore, this research analyzed causes and countermeasures of unstable approach. In order to derive countermeasures, this study selected P International Airport as an example case. In addition, this research analyzed A airline's FOQA data, regional Standard Operating Procedures, and 5 years of environmental factors to identified correlation of those contributing factors. In conclusion, his research concluded following results. First of all, because of P International Airport's geological features, pilots are required to conduct Circling Approach, and this advanced maneuver increases workload at the final stage of flight. Secondarily, meteorological factors such as crosswind, seasonal rain front, local visibility contributes unstable approach. Lastly, these geological and meteorological factors are interrelated, and this uncommon environment can decrease circumstantial judgement ability of pilots and jeopardize aviation safety. As a consequence, it is recommended to reinforce the Crew Resource Management and Threat & Error Management systems so that pilots can perceive identical safety target.
임상연구 : 마취 방법이 대장 절제술 후 장운동에 미치는 영향
이근무 ( Kun Moo Lee ),배우종 ( Jong Woo Bae ),김영환 ( Young Hwan Kim ),임세훈 ( Hoon Se Lim ),이정한 ( Jeong Han Lee ),정순호 ( Soon Ho Cheong ),최영균 ( Young Kyun Choe ),김영재 ( Young Jae Kim ),신치만 ( Chee Mahn Shin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.6
Background: Gastrointestinal bowel movements are reduced by opioid-based anesthesia. Remifentanil is commonly used as total intravenous anesthesia. This study compared to the effect of various anesthetic methods on gastrointestinal bowel movement after colon surgery. Methods: Ninety patients were allocated randomly into three groups. Thirty patients received intraoperative inhalation anesthesia (desflurane + N2O, Group I), 30 patients received intraoperative total intravenous anesthesia (propofol + remifentanil, Group II), and 30 patients received intraoperative epidural anesthesia (epidural lidocaine + propofol, Group III). All patients received postoperative epidural analgesia with a mixture of ropivacaine and morphine. The time to the first passage of flatus, hospital stay and visual analog pain scale were recorded. Results: There was no significant difference in first passage of flatus among groups (Group I: 92.7 ± 19.6, Group II: 86.9 ± 19.4, Group III: 81.9 ± 12.8 hours, P = 0.063). There were no significant difference in the hospital stay and visual analog scale among the three groups. Conclusions: Total intravenous anesthesia with remifentanil did not reduce the gastrointestinal bowel movements compared with those of inhalation or epidural anesthesia. (Korean J Anesthesiol 2006; 51: 659~62)
임상연구 : 마취유도시 Bispectral Index 감시하에 Remifentanil 지속정주에 따른 Propofol의 용량과 혈역학적 변화
김영재 ( Young Jae Kim ),김명훈 ( Myoung Hun Kim ),김영환 ( Young Hwan Kim ),임세훈 ( Se Hoon Lim ),이정한 ( Jeong Han Lee ),이근무 ( Kun Moo Lee ),정순호 ( Soon Ho Cheong ),최영균 ( Young Kyun Choe ),신치만 ( Chee Mahn Shin ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.3
Background: Remifentanil combined with propofol is usually used to induce anesthesia. However, remifentanil and propofol depress the cardiovascular system. This study investigated the effects of a continuous infusion of remifentanil on the propofol dose and hemodynamics using the bispectral index (BIS) during anesthetic induction. Methods: Sixty female ASA physical status class I or II patients, who were scheduled to undergo gynecologic surgery were randomly assigned to one of three groups (n = 20). Normal saline 20 ml/hr (Group S), remifentanil 0.25μg/kg/min (Group 0.25), or remifentanil 0.5μg/kg/min (Group 0.5) was infused intravenously. Propofol was administered slowly two minutes after administering remifentanil or normal saline. The heart rate, mean arterial pressure (MAP) and BIS were measured at baseline, preintubation and postintubation. Result: There were no significant differences in the changes in the BIS among the groups. The MAP and heart rate decreased at preintubation compared with baseline (P < 0.05). The MAP of Group 0.5 at postintubation was lower than that in the other groups (P < 0.05). The heart rate in all groups increased at postintubation compared with baseline (P < 0.05). The heart rate of Group 0.5 at postintubation was lower than that of Group S (P < 0.05). The propofol requirement for unconsciousness was lower in Groups 0.25 and 0.5 than in Group S. The propofol requirement in Groups S, 0.25 and 0.5 was 1.56 ± 0.2 mg/kg, 1.07 ± 0.2 mg/kg and 0.9 ± 0.1 mg/kg, respectively. Conclusions: A combined injection of 0.5μg/kg/min remifantanil with 0.9 mg/kg of propofol decreases the heart rate and MAP at preintubation without adverse effects and appropriately prevents the cardiovascular responses to tracheal intubation, and reduces the propofol dose needed for a loss of consciousness. (Korean J Anesthesiol 2006; 51: 297~301)
Controlled-Flight-Into-Terrain 항공 사고 예방에 관한 연구 -괌사고, 목포사고, 김해사고 중심으로-
변순철 ( Soon Cheol Byeon ),송병흠 ( Byung Heum Song ),임세훈 ( Se Hoon Lim ) 한국항공운항학회 2008 한국항공운항학회지 Vol.16 No.1
The purpose of this study is leading to prevent the major causes of commercial-aviation fatalities about controlled-flight-into-terrain(CFIT) in approach-and-landing accidents. The paper of major analysis for controlled flight into terrain(CFIT) was Guam accident, Mokpo accident and Gimhae accident in commercial transport-aircraft accidents from 1993 through 2002. CFIT occurs when an airworthy aircraft under the control of the flight crew is flown unintentionally into terrain, obstacles or water, usually with no prior awareness by the crew. This type of accident can occur during most phases of flight, but CFIT is more common during the approach-and-landing phase. Ninety-five percent of the Guam accident, Mokpo accident, and Gimhae accident where weather was known involved IMC, fog, and rain. The paper believed that prevention for CFIT accident was education and training for flying crew and upgrade for equipment such as EGPWS, and need more research for professional organizations of airlines, and accomplishing precision approaches should be a high priority.
뇌 손상 환자에서 이중분광계수를 사용한 의식수준의 측정
조재흥 ( Jae Heung Cho ),정순호 ( Soon Ho Cheong ),김현식 ( Hyun Sik Kim ),김세훈 ( Se Hoon Kim ),조광래 ( Kwang Rae Cho ),이상은 ( Sang Eun Lee ),김영환 ( Young Hwan Kim ),임세훈 ( Se Hun Lim ),이정한 ( Jeong Han Lee ),이근무 ( K 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.2
Background: It is important to assess the level of consciousness in patients with brain injuries to determine modes of treatment and prognosis. We evaluated the Bispectral Index (BIS) to determine if it could be used as an objective tool for evaluation of the level of consciousness in brain-injured patients. We also compared the BIS values to clinical sedation scales such as the Glasgow Coma Scale (GCS), Richmond Agitation-Sedation Scale (RASS), and the Reaction Level Scale (RLS). Methods: Thirty eight patients with brain injuries that were admitted to the neurosurgery intensive care unit (NSICU) were enrolled in this study. An investigator evaluated the clinical sedation scales (GCS, RASS, RLS), while a blind observer noted the BIS in the same patient. The BIS score was obtained three times at an interval of 5 hours. The BISs were measured for 1 minute at 5 min prior to the nursing assessment, during the nursing assessment, and at 5 min after the nursing assessment. The BISs used in the data analysis were the maximal, minimal, and mean values obtained during 1 min, which were defined as BISmax, BISmin, and BISmean. A Spearman`s rank correlation coefficient was used to determine if the clinical sedation scales were correlated with the BIS scores. Results: In 38 patients, the BISmax, BISmin, and BISmean were found to be significantly correlated with the GCS, RASS, and RLS. The BISmean had the highest correlation with GCS (r=0.445, P<0.01), while the BIS min had the lowest correlation with RLS (r=-0.278, P<0.01). Conclusions: The results of BIS monitoring were found to be significantly correlated with sedation scales in patients with brain injuries. These findings suggest that BIS can be used as an objective and continuous method for assessment of the level of consciousness in patients with brain injury. (Korean J Anesthesiol 2009;57:185∼9)