소아 비만의 위험 인자와 비만한 자녀를 가진 가족의 특성에 관한 조사 연구

이창연,김웅흠 대한비만학회 1994 The Korean journal of obesity Vol.3 No.1

To study the risk factors of childhood obesity and the characteristics of the parents with obese child, We surveyed 676 primary-school children of 4-5-6th grade living in the isolated residential area for only the one large company employee and their farnilies, located in the suburb, at March 1990. The results were as follows; 1) The prevalence rate of childhood obesity is 19.2%. 2) The obesity index is significantly increased with the increase of birth weight(p$lt;0.05). But the percentage of obese children is not significantly different according to the duration of breast milk feeding(p$gt;0.05). 3) The percentage of obese children in the group who walk to school, or who exercise regularly, is not lower than in the group who do not.(p$gt;0.05) 4) The parental body mass index of the obese children are higher than those of the non-obese children(p$lt;0.05). 5) There is no significant difference of the percentage of obese children, according to the number of siblings, or to the order of birth(p$gt;0.05). 6) Both systolic blood pressure and diastolic blood pressure in the obese children are higher than those in tbe non-obese children(p$lt;0.05). 7) The recognition rate of childhood obesity by the parents with obese child is 74.1%, and most parents with obese child do not know the true medical Problems of childhood obesity exactly.

현대 목주건축 디자인에 나타나는 구조시스템 및 의장 특성에 관한 연구

이창연,이승훈,임채진 대한건축학회 1999 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.19 No.2

The purpose of this study is far understanding Crow contemporary modern wooden architects embody through structural systems when day design the mixed wooden construction, and for looking for the tendency of it. As a result, the mixed wooden construction candy understood as an expression from how an architects things about relationship between parts and parts, parts and whole, and the character of materials that consist it, and such relationship is determined by the requirement of space.

스테로이드 저항성 신증후군 환아에서의 Methylprednisolone 충격 요법의 치료 효과

이창연,하일수,정해일,최용,Lee Chang-Youn,Ha Il-Soo,Cheong Hae-Il,Choi Yong 대한소아신장학회 1997 Childhood kidney diseases Vol.1 No.2

목적 : 소아의 스테로이드 저항성 신증후군은 예후가 불량함에도 불구하고 지금까지 효과적인 치료방법이 없는 병이었으나 1990년 Mendoza등이 Methylprednisolone 충격 요법이 스테로이드 저항성 신증후군에서 효과적이라는 것을 보고하였다. 하지만 2년 뒤 Waldo 등은 Methylprednisolone 충격 요법이 Mendoza 등의 보고와는 다르게 스테로이드 저항성 신증후군에 효과가 적었다고 보고하여 이에 저자는 한국 소아에서 스테로이드 저항성 신증후군이 발생한 경우 Methylprednisolone 충격 요법의 효과를 알아보고 위의 보고의 서로 다른 결과를 확인하고자 본 연구를 시행하였다. 방법 : 1990년부터 1995년까지 만 5년간 서울대병원 소아과에 스테로이드 저항성 신증후군으로 입원한 소아를 대상으로 Methylprednisolone 충격 요법을 시행하여 $30{\pm}11$개월동안 추적 관찰하였다. 결과 : 1) Methylprednisolone 충격 요법 치료로 신증후군이 완해가 유도된 환아는 20명중 9명으로 45%이었다. 2) Methylprednisolone 충격 요법 치료후 신증후군의 완해가 유지된 환아는 20명중 9명으로 45%이었다. 3) Methylprednisolone 충격 요법에 반응이 없었던 환아중 만성 신부전으로 이행된 경우는 5례로서 25%이었다. 결론 : Methylprednisolone 충격 요법은 스테로이드 저항성 신증후군 소아의 45%에서 신증후군의 완해를 유도하고 유지시키는 효과적인 치료 방법이었다. Purpose : The Childhood Steroid Resistant Nephrotic Syndrome (SRNS) has a poor prognosis and there has been no effective therapy against SRNS of children. In 1990, Mendoza have reported that methylprednisolone pulse therapy was effective against SRNS of children. But in 1992, Waldo have reported that methylprednisolone pulse therapy was not as effective as in the report of Mendoza. So, retrospectively, we have studied 20 korean children with SRNS to evaluate the effect of methylprednisolone pulse therapy, Methods : Mothylprednisolone pulse therapy were given to 20 korean children with SRNS who admitted to Seoul National University Hospital from 1990 to 1995 and follow up was done Results : 1) During methylprednisolone pulse therapy, remission of nephrotic syndrome was induced in 45% of patients. 2) during follow up after the end of methylprednisolone pulse therapy, remission of nephrotic syndrome was maintained in 45% of patients. 3) 25% of patients has progressed to chronic renal failure. Conclusion : We think that the methylprednisolone pulse therapy is a effective therapy against SRNS of children with the 45%, remission rate of of SRNS in Korean Children

High-performance all-polymer solar cells via side-chain engineering of the polymer acceptor: the importance of the polymer packing structure and the nanoscale blend morphology

이창연,최준형,강현범,이원호,김태수,김기현,우한영,( Cheng Wang ),김범준 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

Despite the attractive features of all-polymer solar cells (all-PSCs), i.e., enhanced absorption coefficients, the tunability of their energetic and chemical properties and their thermal and mechanical stabilities, they still face the great challenge of having significantly low power convertsion efficiency (PCE) values of only 3-5%. The prominent origins of the poor efficiency of all-PSCs are the undesirable features of the bulk-heterojunction (BHJ) blend morphology including the phase-separated large-scale domain size, reduced ordering of the polymer chains. Tuning side alkyl chains of conjugated polymers is an effective route for manipulating the blend morphology in BHJ type solar cells. However, the role of side chains in all-PSCs is poorly understood. Herein, we report high-performing all-PSCs with 5.96% efficiency by developing a series of naphthalenediimide (NDI)-based polymer acceptors with different alkyl side chains. We demonstrated that the use of the PNDIT with hexyldecyl side chains produced highly-ordered polymer stackings with strong face-on geometry and at the same time, forming the optimal BHJ morphology with finely separated phase domains, all of which contributed together to induce well-balanced μe/μh ratio and generate efficient all-PSCs with PCEs near 6%.

레이저 굴절법을 이용한 LPG와 가솔린의 연소 및 화염전파특성 분석 (Analysis of Combustion and Flame Propagation Characteristics for LPG and Gasoline fuels Using Laser Deflection Method )

이창연,이기형,이창식,강우 대한기계학회 1999 대한기계학회 춘추학술대회 Vol.- No.-

도시 대표경관의 인지요인에 관한 탐색적 연구 - 서울시를 중심으로 -

이창연,김한배,Lee, Chang-Yeon,Kim, Han-Bai 한국조경학회 2010 韓國造景學會誌 Vol.37 No.6

도시이미지 안에서 대표경관들은 그 도시를 상징하며 사람들에게 그 도시의 도시다움을 느끼게 해주는 도시정체성의 중요한 기간자원 역할을 하고 있다. 본 연구는 도시의 대표경관들이 어떠한 지각-인지의 조건들로 인해 대표성을 획득하게 되는지를 밝혀 보고자 하였다. 먼저 서울시를 중심으로 도시 대표경관과 관련된 기존 연구들을 종합하여 대표경관들을 도출하고, 그들 각각의 인지요인들을 설문을 통해 조사하여 유형별 요인별로 다각적 비교분석을 하였고, 그 결과를 향후 대표경관 계획 및 관리방안의 시사점으로 제시하였다. 연구의 기본방향은 특히 가시적 요인, 심미적 요인, 활동적 요인, 문화적 요인을 중심으로 진행되었다. 주목할 만한 사실은 다면적 요인의 분석에 의한 본 연구의 결과는 기존 연구에서의 대표경관의 인지 순위와는 큰 차이를 나타내고 있다는 것이고, 이에는 시민들의 문화적 요인에 대한 인식의 비중이 높아진 것이 원인으로 해석된다. 이러한 연구결과는 아직 기초적 연구결과이기는 하지만 후속 연구의 보완을 통해 향후 대표경관 계획과 관리의 새로운 관점을 제시할 수 있으리라 기대된다. The urban representative landscapes play a leading role in establishing city identity via a symbol of the city and a mediator to make the city all the more worthy of being peculiarized. The study aims at evaluating the perceptive factors in the representative landscapes around the metropolitan Seoul derived from the preliminary researches through questionnaire surveying, in an attempt to analyze their characteristics by type and reason, while further proposing progressive management plans. This study was mostly focused on the visibility factor, activity factor, aesthetic factor and cultural factor influencing on the cognition of urban representative landscapes. The important findings discovered in this research are as follows. First, it was found that people were being interested more on the cultural factors and the activity factors these days rather than visibility factors in the cognition of urban representative landscapes. Second, it was found that the priority rank of urban representative landscapes revealed in this study based on the total account of more diverse perceptive factors, showed so much alteration compared to the previous researches focused mostly upon the visual image.

뇌 실질 출혈이 동반된 Reye 증후군 1례

이창연,오연희,임문환,유문집,박성기,김태우 동국대학교 경주대학 1991 東國論集 Vol.10 No.-

Reye syndrome is a disorder of unknown etiology in which a child recovering form a viral prodrome suddenly develops pernicious vomiting & eventually develops neurologic changes. The syndrome is defined to acute noninflammatory encephalopathy with fatty degeneration of liver and other organs. The coagulopathy or Reye syndrome is associated with proloned PT caused by the mitochondrial injury compromising synthesis of proteins and clotting factors in liver. In this case, we observed ICH on right parietal and occipital area in brain CT. Actually, bleeding in the major organ is extremely rare in Reye syndrome, this may be the first case report of CNS bleeding in Korea associated with Reye syndrome. In addition to case report, we present a brief review of the related literatures.

6 mm 공막터널과 수직봉합술을 이용한 백내장 수술후 난시의 변화

이창연 아주대학교 1996 아주의학 Vol.1 No.2

Among the patients operated for cataract with phacoemulsification through 6 mm scleral tunnel incision and vertical suture by one surgeon, the author analysed change of postoperative astigmatism of the 42 patients (51 eyes) the for 6 months. The postoperative change of astigmatism was 1.92 diopter at 1 day, 1.20 diopter at 1 week, 0.60 diopter at 4 weeks to with-the-rule direction and was 0.30 diopter at 8 weeks and 0.52 diopter at 6 months to against-the-rule direction by keratometric reading. The surgically induced astigmatism of the age group older than 60 years was not signicantly different from that of the younger group. It is concluded that the change of postoperative astigmatism after scleral tunnel incision and vertical suture in cataract surgery was totally 2.44 diopter and age did not affect the change of postoperative astigmatism.

수직 안진을 동반한 뇌간뇌염 1례

이창연,장무환 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

It is known that meningoencephalitis is the disease usually characterized by a hstory of headache, high fever and disturbance of consciousness. Its cause is usually virus. In most cases, inflammatory reaction involve the brain diffusely, but occasionally involve brain locally. In those cases in whom inflammatory reaction involved brain locally, specific symptoms appear according to the location involved. Clinically, we can suspect the site of brain where inflammatory reaction involved, according to clinical symptoms. We experienced a case of meningoencephalitis with downbeat nystagmus implying that the inflammatory lesion involve pontomedullary junction. It was confirmed by MRI. So, we report it with review of literatures.

동국대학 의과대학 포항병원에 1년동안(1989.3.1~1990.2.28)입원한 환자에 관한 조사 연구

이창연,박상후 동국대학교 경주대학 1990 論文集 Vol.9 No.-

We observed patients admitted to Dong Guk University Pohang Hospital from March 1, 1989 to February 28, 1990 and classified them by month, season, department, visited, and by disease according to the International classification of Disease by W.H.O. The results were as follows ; 1) Male to female ratio of in-patients was 1.2 : 1 2) The Internal Medicine department has the largest number of in-patients followed by Obstetrics & Gynecology, General surgery, Orthopaedic surgery, Pediatrics, Neurosurgery, Otolaryngology, Ophthalmology, Urology, Dentistry. 3) The number of in-patients for each staff member per year was 813 patients for Orthopaedic surgery, 454 patients for Internal medicine, 440 patients at obstetrics & Gynecology, 338 patients at Pediatrics, 296 patients at neurosurgery, 274 patients at General surgery, 197 patients at Otolaryngology, 154 patients at Ophthalomlogy, 75 patients at Urology, 12 patients at Dentistry. 4) The average duration of hospitalization was 14.12 days, longest at Orthopaedic surgery, 37.1 days, followed by Neurosurgery, 25.4 days, General surgery, 13.4 days, Urology, 12.1 days, Internal medicine, 10.8 days, Dentistry, 9.2 days, Ophthalmology, 7.9 days, Otolaryngology, 5.7 days, Obstetrics & Gynecology, 5.3 days, Pediatrics, 5.3 days. 5) According to classification of in-patients by area, the number of in-patients from Pohang Si was 3,546, Youngil gun 1,845, Youngduk gun 335, Kyoungju Gun, Uljin Gun 229, Kyoungju Si 213, Ullung Gun 33, and Others 231. 6) Following the International Classification of Disease, the number of in-patients suffering from injury and poisoning is largest, followed by diseases of the digestive system, complications of pregnancy, child-birth, and the puerperium, disease of the respiratory system, infectious and parasitic diseases, diseases of the circulatory system, diseases of the nervous system and sense organs, diseases of the genitourinary system, endocrine nutritional metabolic disease and immunity disorders, mental disorders, diseases of the musculoskeletal system and connective tissue, symptoms signs and ill-defined conditions, diseases of the blood and blood-forming organs, diseases of the skin and subcutaneous tissue, congenital anomalies congenital heart disease and others, certain conditions originating in the perinatal period, neoplasma.