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스네이크 패턴을 가진 대면적 판형 열교환기의 전열성능에 관한 연구
김정규(Jung-Kyu Kim),박재홍(Jae-Hong Park),조성열(Sung-Youl Cho),양명국(Myeong-Kuk Yang),허인은(In-Eun Hur),고성규(Seong-Kyu Ko),임혁(Hyug-Lim),현용익(Yong-Ik Hyun) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-
In view of space saving, the design of more compact heat exchangers is important. Also, to meet the demands for saving energy and resources today, manufacturers have tried to enhance efficiency and reduce the size and weight of heat exchangers. Over the past decades, there have been tremendous advancements in the manufacturing technology of high efficiency heat exchangers. This has allowed the use of high performance(high heat transfer coefficient and low pressure drop) heat exchangers. Consequently, the use of high performance heat exchanger becomes popular in the design of heat exchangers. When compared with the well-established shell and tube heat exchangers, the plate heat exchanger shows a lot of advantages like high NTU values, compactness, low cost, multi duties and reduced fouling etc. For the higher performance in plate heat exchanger, the snake pattern in the heat transfer plate has been developed instead of the conventional herringbone pattern. The performance of the plate heat exchanger with snake pattern was evaluated by test, and provided in this paper.
증례보고 : 여호와의 증인 환자에서 무수혈치료 경험 2예
조성환 ( Sung Hwan Cho ),구본성 ( Bon Sung Koo ),김상현 ( Sang Hyun Kim ),채원석 ( Won Seok Chai ),진희철 ( Hee Cheol Jin ),김용익 ( Yong Ik Kim ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.5
We report two cases of Jehovah`s Witness patients who had massive bleeding after surgery. The first case was a 37-year-old woman who underwent an emergency cesarean section; the other was a 48-year-old man with chronic anemia who underwent removal of a large mass. After the operation, their Hb levels were nearly 3.1 g/dl. They were treated with blood conserving methods, divided into 3 periods (pre, post and operative). Both patients completely recovered uneventfully and were discharged on the 19th and 21st postoperative day. (Korean J Anesthesiol 2008;55:621~4)
연탄(煉炭)가스중독(中毒)의 발생실태(發生實態)에 관(關)한 연구(硏究)
조수헌,신영수,이덕형,김용익,윤덕로,Cho, Soo-Hun,Shin, Young-Soo,Lee, Doek-Hyoung,Kim, Yong-Ik,Yun, Dork-Ro 대한예방의학회 1985 예방의학회지 Vol.18 No.1
A decade ago a survey on the population-base incidence rate of anthracite coal gas (mainly carbon monoxide) poisonig in Seoul area was investigated, resulting in the incidence rate of 306/10,000 risk population and 1 death/10,000. Another survey on the carbon monoxide poisoning was investigated during 1 year period from Apr. 1983 to Mar. 1984. Total subjects of risk population were 67,740 households covering 353,287 persons. The major findings of this survey are as follows: 1. Household-base incidence rate was 8.4% spell-base 10.4%. 2. The incidence rate was the highest in houses having each of slate roof, cement wall, vinyl floor of bedroom and direct 'ondol' heating system. 3. Average 2.1 person was attacked from one incidence of the poisoning; severity-wise person-base incidence rates per 10,000 were 352 in mild poisoning, 54 in severe poisoning and 1.4 in death-overall incidence rate 407. Several facts were identified which supported that this figure was moderately underestimated. As the incidence of the poisoning is affected by socioeconomic and environmental factors, it is natural that one expects the incidence will decrease in proportion to genernal improvement of the above factors. Thus the results of these two surveys seemed preposterous. But further study suggested that the incidence rate (306/10,000) decade before had been significantly underestimated and corrected-rate should have been 478/10,000 level. 4. Age and sex distribution by the degree of the poisoning was uniform with little statistical difference; overall incidence rates by sex were 339/10,000 in male and 475/10,000 in female with significant statistical difference(p<.01). 5. 5.3% of the patients were treated at hospital or local clinic; 3.0% of the patients were hospitalized. Admission rate in comatose patient(severe poisoning) was 14.2%. In conclusion, carbon monoxide poisoning remains a major health problem by now.
양명국(Myeong-Kuk Yang),임혁(Hyug Lim),현용익(Yong-Ik Hyun),박재홍(Jae-Hong Park),조성열(Sung-Youl Cho),김정규(Jung-Kyu Kim),허인은(In-Eun Hur),고성규(Seong-Kyu Ko),손성기(Seong-Ki Son) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
In view of space saving, the design of more compact heat exchangers is relatively important. Also, to meet the demand for saving energy and resources today, manufacturers are trying to enhance efficiency and reduce the size and weight of heat exchangers. Over the past decade, there has been tremendous advancement in the manufacturing technology of high efficiency heat exchangers. This has allowed the use of smaller and high performance heat exchangers. Consequently, the use of smaller and high performance heat exchanger becomes popular in the design of heat exchangers. Welded compact plate heat exchanger is used in high temperature and pressure. In the design of heat exchanger, it is necessary to understand the heat transfer and frictional characteristics, so performance data are provided to help design of this type heat exchanger.
장애인의 국민건강보험 건강검진 수검에 영향을 미치는 요인
박종혁,이진석,이진용,홍지영,김소영,김성옥,조병희,김용익,신영수,김윤,Park, Jong-Hyock,Lee, Jin-Seok,Lee, Jin-Yong,Hong, Ji-Young,Kim, So-Young,Kim, Seong-Ok,Cho, Byong-Hee,Kim, Yong-Ik,Shin, Young-Soo,Kim, Yoon 대한예방의학회 2006 예방의학회지 Vol.39 No.6
Objectives : As the disabled have higher prevalence rates and earlier onsets of chronic diseases than the non-disabled, their participation in mass screening is important for the early detection and intervention of chronic diseases. Nevertheless, in Korea, the disabled have lower participation rates in mass screening services than the non-disabled. The purpose of the study was to find determinants for the participation in the National Health Insurance (NHI) mass screening program among the disabled. Methods : In this study, the NHI mass screening data of 423,076 disabled people, which were identified using the National Disability Registry (2003), were analyzed. Of the factors affecting the participation rates in mass screenings, the following variables were included for the analysis: socioeconomic stati, such as sex, age, category of health insurance program, region and income, disability characteristics, such as disability type, and severity. A multiple logistic regression analysis was used to evaluate the association between the participation rates, disability characteristics variables and demographic variables. Results : The participation rate in mass screening of the disabled was 41.3%, but was lower in females, an age of more than 70 years, self-employed and for those with an average monthly insurance premium over 133,500 Won and in metropolitan legions. The participation rate was 1.31 times lower in females than males (95% CI=1.29-1.33); 3.50 times lower in the elderly (more than 70 years) than the younger (95% CI=3.33-3.67); 1.43 times lower in those who live in metropolitan areas (95% CI=1.40-1.46); 2.59 times lower for those in a health Insurance program for the self-employed than for employees (95% CI=2.56-2.63), 1.19 times lower for the higher income (more than 133,500) than the lower income group (4,400-22,000) for the average monthly insurance premium (95% CI=1.15-1.23): 2.04 times lower for those with brain palsy and stroke disabilities than with auditory impairments (95% CI: 1.97-2.11) and 3.27 times for those with severe compared to mild disabilities (95% CI=3.15-3.40). Conclusions : The disabled with high severity, and locomotive and communication disabilities have lower participation rates in mass screening services in Korea.
박재홍(Jae-Hong Park),조성열(Sung-Youl Cho),김정규(Jung-Kyu Kim),양명국(Myeong-Kuk Yang),허인은(In-Eun Hur),고성규(Seong-Kyu Ko),임혁(Hyug-Lim),현용익(Yong-Ik Hyun) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-
Applications of the plate heat exchanger are being expanded in ships and marine plants. Marine engine L.O(lubricant oil) cooler is one of the applications of the plate heat exchanger. It has very important role as engine radiator in the ship. Lubricant oil is flowed inside ship engine like the land engine and temperature is up to 80~90℃. Some L.O coolers are mounted in the front of the engine, and operating pressure is up to 4~8 ㎏/㎠. Because vibration of engine is passed to L.O cooler, anti-vibration is required. New L.O cooler for medium speed marine engine was developed, and its performance was evaluated by test and provided in this paper.
박재현,윤석준,이희영,조희숙,이진용,은상준,박종혁,김윤,김용익,신영수,Park, Jae-Hyun,Yoon, Seok-Jun,Lee, Hee-Young,Cho, Hee-Sook,Lee, Jin-Yong,Eun, Sang-Jun,Park, Jong-Hyock,Kim, Yoon,Kim, Yong-Ik,Shin, Young-Soo 대한예방의학회 2006 예방의학회지 Vol.39 No.1
Objectives: This study estimated the burden of disease especially caused by psychiatric disorders in Korea by using DALY, a composite indicator that was recently developed by the Global Burden of Disease study group. Methods: First, 11 of the major psychiatric disorders in Korea were selected based on the ICD-10. Second, the burden of disease due to premature death was estimated by using YLLs (years of life lost due to premature death). Third, for the calculation of the YLD (years lived with disability), the following parameters were estimated in the formula: the incidence rate, the prevalence rate and the disability weight of each psychiatric disorder. Last, we estimated the DALY of the psychiatric disorders by adding the YLLs and YLDs. Results: The burden of psychiatric disorder per 100,000 people was attributed mainly to unipolar major depression (1,278 person-years), schizophrenia (638 person-years) and alcohol use disorder (287 person-years). For males, schizophrenia (596 person-years) and alcohol use disorder (491 person-years) caused the highest burden. For females, unipolar major depression (1,749 person-years) and schizophrenia (680 person-years) cause the highest burden. As analyzed by gender and age group, alcohol use disorder causes a higher burden than schizophrenia in men aged 40 years and older. For females, unipolar major depression causes the highest burden in all age groups. Conclusions: We found that each of the psychiatric disorders that cause the highest burden is different according to gender and age group. This study's results can provide a rational basis to plan a national health policy regarding the burden of disease caused by psychiatric disorders.
임상연구 : 진통제와 환자 조절 진통(Patient-Controlled Analgesia)에 대한 수술 전 교육이 수술 후 진통제 사용량에 미치는 영향
박정헌 ( Jeong Heon Park ),권민아 ( Min A Kwon ),구명신 ( Myoung Shin Koo ),김용익 ( Yong Ik Kim ),김순임 ( Soon Im Kim ),김선종 ( Sun Chong Kim ),강진구 ( Jin Gu Kang ),조현성 ( Hyun Sung Cho ),이병달 ( Byung Dal Lee ),김갑수 ( G 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.6
Background: The purpose of this study is to evaluate the patients` general perception about the analgesics and the effects of the preoperative education about analgesics and patient-controlled analgesia (PCA). Methods: One hundred patients scheduled for elective gastrectomy were randomly allocated into two groups. In control group (n = 50), patients were given conventional preanesthetic visit with questionnaire survey on PCA one day before operation. In study group (n = 50), patients were sufficiently explained about postoperative analgesia and PCA by anesthesiologist and given precise explanation sheet about PCA. Total amounts of drug used in PCA as well as rescue analgesics, the pain scores, and side effects were compared. Results: 62.2% of patients had much information from various sources that analgesics effects positively in the recovery phase, but actually 73.7% of patients considered that analgesics do not seem to have any influence on the recovery after operation. There was no difference between the amounts of total PCA used, rescue analgesics, and the pain scores. However, the educated patients complained less dizziness at postoperative days (POD) one. Also, the number of patients excluded from study due to the PCA discontinuation secondary to related side effects was less in educated patients (P = 0.025). Conclusions: Preoperative education about analgesics and PCA failed to demonstrate significant decrease in the amount of analgesics and of pain scores. However, it lowered the incidence of PCA discontinuation due to side effects. (Korean J Anesthesiol 2006; 51: 715~9)