외음부에 발생한 혈관근섬유모세포종 1 례

이후형(HH Lee),오대식(DS Oh),윤만수(MS Yoon),김원회(WW Kim) 대한산부인과학회 1997 Obstetrics & Gynecology Science Vol.40 No.9

Angiomyofibroblastoma is a recently described mesenchymal tumor characterized by unique morphologic features, a propensity to arise in the vulva, and a non-aggressive beni-gn biologic behavior. It is typically well circumscribed and superficially located tumor and its cellularity is variable with hypercellular and hypocellular areas composed of bland-look- ing, pump stromal cells showing the immunophenotype of vimentin-/desmin - positive, and muscle specific actin(MSA)-/α-smooth muscle actin(ASMA) - negative. Spindle or plasm-acytoid cells are the characteristic cell types of most tumors. It is similar to an aggressive pelvic angiomyxoma in histology. Because of histologic similarity and differences in the clinical course and treatment, distinction from aggressive angiomyxoma was needed. It rep-resents new type in the expanding spectrum of tumors of which myofibroblasts constitute an integral component. We experienced a case of angiomyofibroblastoma of the vulva occuring in a 42 years old woman. The lesion was relatively well encapsulated mass(3×1.5×0.9 cm in dimension), showing intimate admixture of hypercellular and hypocellular area. The tumor contained prominent, somewhat ectatic vessels surrounded by smooth muscle cells, some of which blend or fan out from the muscular walls of the vessels. The margin was relatively free from tumor cells. At immunohistochemical stain, vimentin & desmin was diffuse and weak positive, smooth muscle actin was very a few and weak positive in tumor cells.

중뇌동맥폐쇄에 의한 백서뇌경색모델에서 제대혈 CD34(+) 세포투여에 의한 기능회복

이후형 ( Hoo Hyung Lee ),김휘곤 ( Hwi Gon Kim ),장성규 ( Sung Kyoo Jang ),최욱환 ( Ook Hwan Choi ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.11

Objective: This study was designated to determine the effect of cord blood cell transplantation in ischemic injury model. Methods: In this study, we administered human umbilical cord blood (hUCB)-derived CD34(+) cells into the lateral ventricle or directly into the striatum and assessed cell migration in mice with cryoinjury and behavioral recovery in rats with transient middle cerebral artery occlusion (MCAo). CD34(+) cells were isolated by magnetic cell sorting using CD34-microbeads and labeled with CM-Dil. Results: When CD34(+) cells were injected into mice brain with cryoinjury, cells were migrated into a injury site after one week of injection. Similarly, injected CD34(+) cells were migrated into the periphery of infarcted area in rats with transient MCAo. When spontaneous activity was measured using a modified neurological severity score (mNSS), it was found that functional recovery was significantly higher when CD34(+) human umbilical cord blood cell (hUCBC) was transplanted 24 hours after stroke compared with phosphate buffered saline (PBS)-injected or CD34(-) transplanted, stroked animals (P<0.05). Although only small portion of transplanted cells were differentiated into neural lineages, CD34(+) hUCBC transplantation increased Brdu incorporation and recruitment of doublecortin (DCX) (+) cells in ischemic boundary zone. Conclusion: These results suggest that hUCBC transplantation may be an effective treatment for brain injuries, such as stroke, or neurodegenerative disorders by promoting endogenous repair process of the brain.

신경망을 이용한 효율적인 비디오 컨텐츠 분류 방법

이후형(Hoo-Hyoung Lee),전승철(Seung-Chul Jun),박성한(Sung-Han Park) 대한전자공학회 2001 대한전자공학회 학술대회 Vol.2001 No.6

중국 O2O 택시 만족도 및 지속적 이용의도의 결정요인

이후형(Lee, HuHyeong),전정현(Jun, Junghyun),장 티엔티엔(Zhang, Tiantian) 한국비즈니스학회 2019 비즈니스융복합연구 Vol.4 No.1

온라인 요인과 오프라인 요인이 택시 앱 이용의도에 미치는 차별적 영향

이후형(HuHyeong Lee),전정현(Junghyun Jun),최지호(Jiho Choi) 한국상품학회 2020 商品學硏究 Vol.38 No.3

본 연구는 O2O 택시 애플리케이션을 이용해 본 경험자들을 대상으로 온라인 요인과 오프라인 요인이 택시 앱 이용의도에 미치는 차별적 영향을 실증하는데 목적이 있다. 온라인 요인은 경제적 혜택, 시간적 혜택, 이용적 혜택이며, 오프라인 요인은 택시서비스이다. 모바일 애플리케이션 영역에서 미국과 함께 자국의 인터넷 기업을 중심으로 빠르게 성장하고 있는 중국 시장을 대상으로 수집된 자료가 분석에 이용되었다. 분석 결과, 본 연구에서 고려된 온라인 이용요인과 오프라인 이용요인은 O2O 택시 앱의 지속적 이용의도에 유의미한 영향이 존재하는 것으로 밝혀졌다. 온라인 요인 중 경제적 혜택과 이용적 혜택은 지속적 이용의도에 정(+)의 영향을 미쳤으나, 시간적 혜택은 유의미한 영향이 나타나지 않았다. 오프라인 요인(택시 서비스)은 지속적 이용의도에 유의미한 정(+)의 영향을 미쳤으며, 온라인 요인에 비해 높은 정(+)의 영향을 미쳐 차별성이 있는 것으로 나타났다. 본 연구의 결과는 O2O 택시 앱 서비스의 온라인 이용요인과 오프라인 이용요인이 지속적 이용의도에 차별적으로 영향을 미친다는 사실을 확인하였다는 점에서 이론적 시사점을 가진다. 또한 실무적인 측면에서 새로운 O2O 서비스를 준비하는 사업자는 온·오프라인 앱 서비스에 대한 지속적 이용의도를 높이기 위해 소비자에 대한 채널별 이용요인의 긍정적인 평가를 높이기 위한 노력이 필요함을 보여주고 있다. The purpose of this study is to demonstrate the differential effects of online and offline factors on the intention to use taxi apps for experienced users using the O2O taxi application. The online factors are economic benefits, time benefits, and usage benefits, while offline factors are taxi services. In the mobile application area, data collected for the rapidly growing Chinese market, centered on domestic Internet companies along with the United States, were used for analysis. As a result of the analysis, it was found that the online and offline use factors considered in this study have a significant effect on the intention to continuously use the O2O taxi app. Among online factors, economic benefits and utilization benefits had a positive effect on continuous intention, but temporal benefits did not show significant influence. The offline factor (taxi service) had a significant positive (+) effect on continuous use intention, and it was found that there was a discrimination because it had a higher positive (+) effect than the online factor. The results of this study have a theoretical implication in that it was confirmed that the online and offline use factors of the O2O taxi app service have a discriminating effect on continuous use intention. In addition, it is shown that operators who prepare new O2O services from a practical point of view require efforts to increase positive evaluation of usage factors for each channel for consumers in order to increase their intention to continuously use online and offline app services.

Ham`s F-10 배양액에서 Hypoxanthine이 생쥐배아의 체외성장에 미치는 영향에 관한 연구

이규섭(KS Lee),김원희(WW Kim),최욱환(OH Choi),윤만수(MS Yoon),나용진(YJ Na),이후형(HH Lee) 대한산부인과학회 1996 Obstetrics & Gynecology Science Vol.39 No.3

In an effort to improve the invitro culture conditions of human gamates and embryos in our laboratory, this study was undertaken to assess the presence of hypoxanthine in Ham`s Nutrient Mixture F-10, a chemically defined, complex medium, commonly used for invitro fertilization of human as well as animal oocytes, affects embryogenesis in our two-cell mouse embryo bioassay. For the two-cell mouse embryo bioassay, embryos extracted from each female mouse oviduct were equally distributed and incubated weparately in Ham`s F-10 with or without hypoxanthine supplementation, and either without any protein supplementation or with additional pretein(4 mg/ml BSA or 10% human cord surum). Individual embryos were categorized as follows: 3-to 4-celll, 6-to 8-cel, morula, and blastocyst. Results were expressed as the proportion of embryoos in each test dish achieving or surpassing the specified developmental stage at 24 hours intervals for a period of 72 hours. The results were as follows: 1. At 72 hours of incubation, 52.6% of the embryos without hypoxanthine reached the blastocyst stage, compared with 37.6%(p0.05). 3. The addition of human cord serum supplementation to the Hams F-10 without hypoxanthine was revealed a high percentage(73.1%) of the 2-cell mebryos developed into blastocysts, compared with 58.9%(p

한국의 인플레이션과 상대가격 변동성에 관한 실증연구

이승준 ( Seung Jun Lee ),이후형 ( Hoo Hyung Lee ) 한국국제무역학회 2001 國際貿易硏究 = Journal of international trade studies Vol.7 No.1

본 논문은 한국의 소비자물가지수를 기본분류별, 상품성질별로 구분하여 상대가격 변동성을 측정한 후 이를 인플레이션과 회귀하여 인플레이션과 상대가격 변동성간의 관계를 파악하였다. 실증분석결과 총지수, 식료품, 농축수산품, 공업제품, 비내구재 등에서는 유의한 양의 상관관계가 존재하는 것으로 나타나 인플레이션이 상대가격의 변동성을 높인다라는 것이 확인되었다. 그러나 CORE CPI, 식료품이외, 서비스, 내구재에서는 인플레이션과 상대 가격 변동성간의 유의한 양의 상관관계가 존재하지 않는 것으로 나타났다. This study investigated the empirical relationship between inflation and relative price variability in the Korean economy. The relative price variability was generated through using categorized data based on basic and commodity classifications. The empirical results show that the relationship between inflation and the relative price variability of the composite price index, food prices, agricultural and fishery commodity prices, industrial product prices and nondurable good prices was positive and statistically significant. These empirical evidences suggest that inflation had been increasing the relative price variability for the sample period in the Korean economy. However, this study empirically failed to show significance of the relationship between inflation and the relative price variability of the Core CPI, nonfood prices, service prices, and durable good prices.

접대부들의 사회심리학적 분석과 매독감염상태에 대한 연구

이후형,전인기,김영표 대한피부과학회 1977 大韓皮膚科學會誌 Vol.15 No.4

Following the Korean War, the presence of foreign troops in Korea and lowered. sexual morality caused an increase in the rate of prostitution and related venereal diseases. Though the health authorities made efforts to handle these problems, they didnt obtain any noticeable results, because they neglected the scientific prevention and treatment based on expert knowledge, and the sociopsychological problem, which was the basic cause of the increment in the rate of prostitution. They only took administrative action against the prostitutes. Therefore, in July, 1976, we went to a town(named Silver Town) located on the outskirts of a U.S. Air Force base, and, examined and guestioned a number of prostitutes. Each of the 288 subjects residing in the town was given a questionaire that dealt with individual living attitudes, family and social background, and sociopsychological aspects of tbeir lifestyle. Questionaires were completed anonymously. Serological tests for syphilis, the UDRL and TPHA, were also administered. The results of our atudy are as follows. 1) Most of the prostitutes had grown up in large families, in which females were predominant. Because of economic difficulties they dropped out of school a.t an early age and became prostitutes. The average age of a prostitute at the time of her first sexual experience was 19. 9 years, the expriences usually taking place with her first boyfriend. Forty six psrcent of tbe subjects had intercourse for the first time between the ages of 15 and 19. Fortynine & two tenths percent of them because prostitutes within one year of their initial sexual act, and all of them at an average interval of 2.5 years following the first sexual experience, the average age being 22. 4 years. 2) The longer the women had worked as prostitutes, the more they felt dissatisfied with their work, and the more they desired to change to an occupation which was healthier and entailed more self-respect. 3) Out of 283 subjects, 39% had a history of venereal disease, predominantly of gonorrhea. Tbe results of the STS administered to all subjects were,; VDRL 7.7% positive and TPHA 6% positive. It was also concluded that the subjects had no educational or working knowledge of venereal diseases.

胎兒 汗腺 導管 發生에 關한 硏究

李厚炯,朴誠植,崔在權 全南大醫大 1986 전남의대학술지 Vol.23 No.1

어인선에 관한 임상적 및 유전학적 연구

이후형,김영표 대한피부과학회 1982 大韓皮膚科學會誌 Vol.20 No.6

This study was attempted mainly to estimate the frequency of ichthyoses and its genetic characteristics among general population in Chonnam Province. One hundredand thirtyone subjects heing comprised of 121 with ichthyosis vulgaris, 6 with X-linked recessive ichthyosis and 4 with lamellar ichthyosis visited the department of Dermatology, Chonnam National University Hospital from 1971 through 1980. All except 7 patients had visited the hospital with chief complaints of a skin problem other than ichthyoses itself. The frequency of ichthyosis vulgaris seems to be somewhere between, 1/300 and 1/400. 86% were found to either be sporadic cases or come from families from which not enough information was obtained to define a mode of inheritance. The fact that 43% of the sibling of affected patients developed ichthyosis vulgaris points out that it is a highly penetrant autosomal dominant, disease. Skipped generation was observed in 2 families, and gonadal mosaicism in 1 family. Atopic diseaaes were found only in 12.0% of cnses of ichthyosis vulgaris. The disease appeared in 81% of cases before 1 year af age. The skin lesions of ichthyoses were developed on the lower limhs, back, upper limbs, abdomen and scalp in the order of frequency.