비유황계 부취제를 적용한 LPG연료의 차량 배출가스 특성

이호길(Ho-kil Lee),김용태(Yong-tae Kim),강정호(Jeong-ho Kang),이영재(Young-jae Lee),권오석(Oh-seuk Kwon),조종표(Chong-pyo Cho) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11

Vehicle exhaust gases has been affected by fuel quality, combustion technology and after-treatment factors. Especially, fuel quality is a very important key to accomplish the high power, high efficiency and low exhaust gases level. In this regard, LPG is more clean and lower carbon fuel than gasoline and diesel. However, because of containing sulfur odorant (EM, ethyl mercaptan) in LPG, LPG fuel has more higher sulfur content than diesel and gasoline. It is well known that SOx produced for a compounds of sulfur by the combustion process. Also, it is caused that air pollution and poison for catalyst by compounds of sulfur. In this study, LPG fuel was added to sulfur-free odorant that it has been composed for Alkyl-Isovalerate, Alkyl-Acrylate and Alkyl-Pyrazine. And this study evaluated for vehicle emissions characteristics for sulfur-free odorant in the CVS 75and NEDC mode.

발등에 발생한 건초 거대세포 종양

이호표 ( Ho Pyo Lee ),박홍진 ( Hong Jin Park ),박연호 ( Yeon Ho Park ),김진우 ( Jin Wou Kim ),서은주 ( Eun Joo Suh ) 대한피부과학회 1995 대한피부과학회지 Vol.33 No.6

We report a case of giant cell tumor of the tendon sheath involving the foot, in a 21-year-old female patient, who presented with an asymptomatic tumor on the dorsum of her right foot. Histopathologically the tumor is surrounded by thin fibrous connective tissue. The characteristic findings of the excised specimen revealed a typical mixture of abundunt round or polygonal histocyte-like cells with varying portions of spindle-shaped fibroblast-like cells and multinucleated giant cells. Variable amounts of hyalinized fibrous stromal tissue were also present. After excision, local recurrence has not been observed for 3 months. (Kor J Dermatol 1995;33(6): 1168~1171)

절개사면에 설치된 활동억지시스템의 거동에 관한 연구

홍원표(Hong Won Pyo),이호문(Lee Ho Mun),임석규(Lim Seok Gyu),신도순(Shin Do Soon) 대한토목학회 2004 대한토목학회 학술대회 Vol.2004 No.10

비전형적인 부위에 발생한 사면발이증 2예

이호표,백승철,조백기,이정기,홍남수 ( Ho Pyo Lee,Seung Churl Paik,Baik Kee Cho,Jung Gee Lee,Nam Soo Hong ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.3

The pubic louse, Pthirus pubis is a blood-sucking ectoparasite adapted to hold onto pubic, axillary and body hairs. It is usually confined to the pubic and inguinal region. However, it may also rarely involve the scalp and eyelashes. We report two cases of phthiriasis occurring on unusual sites, the first case occurring on the scalp of a 5 month-old male infant, and the second case on the eyelashes of a 49-year-old fe- male. (Kor J Dermatol 1997;35(3): 579-583)

표피하 수포를 동반한 연성 섬유종 2예

박홍진 ( Hong Jin Park ),이호표 ( Ho Pyo Lee ),박연호 ( Yeon Ho Park ),김진우 ( Jin Wou Kim ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.1

We report a 34-year-old woman and a 16-year-old girl who had a soft fibroma with blister on the thigh and on the back, respectively. Histopathologically, in the biopsy of both tumors, a subepidermal blister overlying the tumor and the degeneration of the epidermis were observed without any evidence of dermal degeneration. The major cause of the blister formation seems to be ischemia due to twisting or compression of the neck of the soft fibroma. (Kor J Dermatol 1996;34(1): 147-150)

중력보상장치 설계계수를 고려한 고가반 로봇설계에 관한 연구

이도승(Do-Seung Lee),이호수(Ho-Su Lee),표상훈(Sang-Hun Pyo),윤정원(Jung-Won Yoon),류성기(Sung-Ki Lyu) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.5

In recent years, medium- to large-scale transportation machinery and machine tool manufacturing process lines have shown a trend toward centralization, softening, lightening, and slimming to reduce costs and increase productivity. This has increased the demand for vertical articulated robots. When developing and introducing a heavy weight-handling robot that can be easily applied to existing production lines, it is expected to have a great effect in securing industrial competitiveness by solving industrial issues such as the decreased productivity and increased risk of accidents due to work involving heavy lifting. In this study, we design a 6-axis robot mechanism with a heavy load-handling capacity of 700kg or more for large-sized materials of various types supplied in small quantities.

임상 ; 조기분만과 만삭분만 산모의 모발에서 측정한 중금속 농도의 비교

김석영 ( Suk Young Kim ),이글라라 ( Clara Lee ),이호형 ( Ho Hyoung Lee ),황병철 ( Byung Chul Hwang ),이순표 ( Soon Pyo Lee ),박종민 ( Jong Min Park ) 대한주산의학회 2010 Perinatology Vol.21 No.4

목적: 산모의 영양상태는 태아에게 직접적인 영향을 미치며 산모의 영양상태뿐만이 아니라 산모 체내의 유해한 중금속도 태아의 발육에 영향을 미친다. 이전의 연구에서 산모의 중금속이 높을수록 태아의 발육지연이나 조기분만의 비 율이 높아진다는 보고가 있었다. 그러나 최근 여러 연구에서 산모의 중금속의 농도와 태아의 발육지연이나 조기분만 과의 관계에 대해 일치할 만한 결과를 내놓고 있지 못하다. 따라서 이번 연구를 통해 조기분만과 정상분만 산모간에 중금속 농도의 유의한 차이가 있는지 알아보고자 하였다. 방법: 2008년 3월부터 2008년 8월까지 본원을 방문한 52명의 산모를 대상으로 연구를 진행하였으며 임신주수 37주를 기준으로 조기분만군과 정상분만으로 나누어 두군을 비교 평가하였다. 조기분만군은 23명, 정상분만군은 29명 이었다. 중금속의 농도를 측정하기 위해서 모발 미네랄 검사를 사용하였으며 머리카락을 이용한 모발미네랄 검사의 항목으로는 칼슘, 마그네슘, 나트륨, 칼륨, 구리, 아연 등 15가지 영양 미네랄을 검사하였으며 중금속으로는 안티몬, 우라늄, 비소, 베릴륨, 수은 카드뮴, 납, 알루미늄의 7가지 중금속이 검사항목에 포함되어 있으며 그 외에 백금, 니켈등 14가지 기타 미네랄을 검사하였다. 결과: 모발 미네랄 검사를 통해 산모의 모발에서 얻은 검체의 중금속 농도를 비교했을 때, 수은, 알루미늄, 납 성분이 조기분만군과 정상분만군 모두에서 검출되었으나 두 군간의 유의한 차이를 나타내는 중금속은 없었다. 결론: 모발 미네랄 검사를 통해 산모의 몸속에 중금속이 축적되어 있음을 확인하였고 비록 조기분만군과 정상분만 군 간의 농도를 비교해 본 결과 유의한 차이는 없었다. 그러나 중금속의 노출이 태아의 발달 이상이나 분만 시 여러 합병증을 야기시킨다는 여러 논문들의 연구결과를 볼때 중금속의 악영향을 간과할 수는 없었다. Objectives: Previous studies on the effects of heavy metal exposure on adverse birth outcomes are still inconsistent. Heavy metal exposure would be related to decreased birth weight and a shortened gestational age. The aim of this work was to investigate maternal hair heavy metal concentrations in relation to gestational age at delivery. Methods: A total of 52 maternal hair samples were collected at the department of Obstetrics and Gynecology, Gil hospital, Korea. Delivery before 37 weeks of gestation was defined as preterm and delivery after 37 weeks of gestation was defined as full-term delivery. We gathered the specimens from maternal hair approaching delivery. 23 samples were taken from preterm delivered mothers and 29 samples from full term delivered mothers. We evaluated maternal specimen by hair tissue mineral analysis to measure heavy metal concentrations accumulated for more than several months. All statistical analyses were performed with Chisquare test, Mann-Whitney U test and Wilcoxon W test. Results: Heavy metal was revealed in pregnant women`s hair but there was not a significant correlation between levels of heavy metal and gestational age at delivery. Compared numbers of preterm delivery and fullterm delivery by stratified by heavy metal concentrations did not have significant correlation. Conclusions: This study does not show any strong relationship between delivery outcome and heavy metal measured by hair tissue mineral analysis. Further prospective studies with serial measures of cord blood heavy metal level and hair its levels may be required.

당뇨합병임신과 비당뇨임신에서 재태기간에 따른 출생체중의 비교

박종민 ( Jong Min Park ),김석영 ( Suk Young Kim ),이순표 ( Soon Pyo Lee ),이호형 ( Ho Hyoung Lee ),황병철 ( Byung Chul Hwang ),민들레 ( Deul Lae Min ) 대한산부인과학회 2010 Obstetrics & Gynecology Science Vol.53 No.12

목적: 산모의 고혈당증은 태아에서 인슐린 생성을 증가시켜 태아성장의 증가를 초래한다고 알려져 있다. 그러나 임신성당뇨를 포함한 당뇨합병임신의 산전진단이 불량한 주산기예후를 정확하게 예측하는 것에는 제한적이다. 본 연구는 임신성당뇨를 포함한 당뇨합병임신에서 조기분만과 만삭분만으로 출생한 신생아 체중을 중심으로 대조군과 비교를 통해서 차이점을 살펴 보았다. 연구 방법: 2005년 1월에서 2008년 12월까지 당뇨합병임신으로 진단받고 분만한 166명의 산모와 같은 기간에 당뇨를 동반하지 않은 248명의 산모를 대조군으로 하였다. 당뇨합병임신은 1형 및 2형 당뇨 그리고 임신성당뇨는 본원에서 100 g 당부하검사를 통해 진단된 경우와 타병원에서 임신성당뇨로 진단받고 분만을 위해 전원된 산모를 포함하였다. 태아기형, 태아사망 및 쌍태 임신은 연구대상에서 제외하였다. 임신 37주 미만의 조기분만과 만삭분만으로 나누어 출생체중의 차이 및 3.8 kg 이상 출생아 빈도를 비교하였다. 결과: 연구기간 중 당뇨합병임신의 발생은 4.9% (166/3,404)였으며 임신성당뇨가 86.1% (143/166), 1형/2형 당뇨가 13.9% (23/166)였다. 37주 미만의 조기분만이 당뇨합병임신에서 32.5% (54/166) 만삭분만이 67.5% (112/166)이었고, 조기분만에서 1형/2형 당뇨군(3,315 g), 임신성당뇨군(2,492 g)이 대조군(2,118 g)보다 출생체중이 더 무거웠고(P=0.001), 만삭분만에서는 1형/2형 당뇨군(3,540 g), 임신성당뇨군(3,371 g)이 대조군(3,243 g)보다 출생체중이 더 무거웠고, 임신주수도 더 짧았다(P=0.002, P=0.000). 3.8 kg 이상 출생아 빈도는 1형/2형 당뇨군에서 43.5% (10/23), 임신성당뇨군에서 16.8% (24/143)로 대조군(8.5%, 21/248)보다 높은 빈도를 나타내었고(P=0.000), 신생아 결과로 5분 Apgar 7점 이하의 빈도는 1형/2형 당뇨군에서 20% (2/10), 임신성당뇨군에서 10.9% (15/143)로 대조군(8/248)보다 높았다(P=0.013). 출생체중에 영향을 줄 수 있는 임상적 변수는 당뇨 합병임신에서 출생체중과 체질량지수 사이에는 의미 있는 결과를 관찰할 수 있었다(R=0.298, P=0.009, 95% confidence interval; 11.159~76.817). 결론: 보다 정확한 당뇨합병임신의 진단기준의 확립과, 임신 중 체중관리 및 체질량지수의 추적 관찰을 통해서 과다한 태아성장이 임신성당뇨에서 잠재적인 불량한 결과를 나타내는 지표임을 인식하고 이의 발생을 예방하는 데 노력해야 할 것이다. Objective: The risk of macrosomia in diabetic complicated pregnancy is increased perinatal morbidity. But it is difficult to predict adverse outcomes after birth with conventional diagnostic tools of diabetes in pregnant women. We evaluated the birth-weight between diabetic and non-diabetic pregnant women based on gestational weeks to determine adverse pregnancy outcome. Methods: We selected 166 diabetic complicated pregnant women delivered between January 2005 and December 2008 and 248 non-diabetic pregnant women at same period. We compared the birth-weight between two groups in relation to the gestational age below and over 37 weeks. Fetal anomalies, fetal death, and multifetal pregnancy were excluded in this study. And we also evaluated the incidence of baby who had birth-weight 3.8 kg or more and their neonatal outcomes between two groups. Results: There were 4.9% (166/3404) of diabetic complicated pregnancies. The preterm births (birth before 37 weeks of gestation) were occurred 32.5% (54/166) and term births (birth after 37 weeks of gestation) were 67.5% (112/166). The mean birth-weight in preterm birth showed 2,492 g of gestational diabetes, 3,315 g of pregestational diabetes and 2,118 g of control group (P=0.001). The mean birth-weight and gestational age at delivery in term birth showed pregestational diabetes and gestational diabetes were heavier and shorter than those of control group (P=0.002). The incidence of 3.8 kg or more of birth-weighted baby appeared 43.5% (10/23) of pregestional diabetes, 16.8% (24/143) of gestational diabetes and 8.5% (21/248) of control group (P=0.000). The Apgar score less than 7 at minutes of neonate were more frequent in pregestational and gestational diabetes than that of control group (P=0.013). Conclusion: It is important to classify the type of diabetes during pregnancy and there should be needed to predict adverse pregnancy outcomes including macrosomia.

3리터급 커먼레일 DME 시제작 엔진의 성능 특성

오세두(Se-Doo Oh),박정권(Jung-Kwon Park),이호길(Ho-Kil Lee),이기수(Gee-Soo Lee),표영덕(Young-Dug Pyo),정수진(Soo-Jin Jeong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

Di-methyl ether (DME) has attracted great attention as the upcoming alternative fuel that can satisfy the saving of fossil energy and the reduction of air pollutants and the greenhouse gas such as CO₂. DME as an automotive fuel can be produced on similar levels of diesel oil prices. And it is reported that the DME engine shows the equal emission performance with a gasoline engine and the equal thermal efficiency with a diesel engine. In this study, the DME prototype engine was made with 3-liter diesel engine of a common-rail injection system. This engine has the high pressure fuel pump and the injectors for the DME fuel. The power performances and the emission characteristics of its engine were investigated with an universal ECU system. The high pressure pump is an eccentric type with 2-plungers, and the high pressure injector is designed by the nozzle flow analysis. The universal ECU system includes the separate injector driver. And injection rate, injection pressure, injection timing, injection duration, multi injection and EGR rate can be controlled by this system. The performance of an universal ECU system was confirmed comparing with that of the base diesel engine. DME engine performance and thermal efficiency were measured. The emission characteristics of its engine were evaluated and in various operating conditions.

타액선에 생긴 선낭암의 임상적 고찰

김광문(Kwang Moon Kim),김은서(Eun Seo Kim),이호기(Ho Ki Lee),홍원표(Won Pyo Hong) 대한두경부종양학회 1992 대한두경부 종양학회지 Vol.8 No.2

After analysis according to age, sex, site of origin, nodal involvement, perineural invasion. histopathology and treatment modality. authors had reached the following conclusion about the 28 cases of adenoid cystic carcinoma of the salivary gland, which were, histopathologically, diagnosed at Yonsei University Severance Hospital and Yongdong, Severance Hospital during the 8-year period from Apr. 1983 to Mar. 1991. Among the 28 cases, 13 were females and 15 were males, which implies that there isn't any sigificant distinction of gender. The age range was 24 years to 69 years with a mean age of 49 years, and the most common site of origin in order was 6 cases(21.4%) of maxillary sinus, 5 cases(17.8%) of submandibular gland, each 4 cases(14.4%) of parotid gland, palate, 3 cases(10.4%) of nasal cavity and each 2 cases(7.1%) of mouth floor, nasopharynx with each one case(3.6%) of buccal mucosa and retromolar trigone. With clinical staging by UICC, the 5-year survival of adenoid cystic carcinoma was 100% in stage I and II, 87.5% in stage III. In stage IV, all of the patient were died within 3 years. We have known that the prognosis was poorer in following cases; the cases with higher clinical stage, primary site other than the major salivary gland especially maxillary sinus and positive neural or nodal invasion.