Erbium YAG 레이저 조사 후 Guinea Pig 피부에서 관찰된 조직학적 변화

양재석,계영철,김수남 ( Jae Seok Yang,Young Chul Kye,Soo Nam Kim ) 대한피부과학회 1997 大韓皮膚科學會誌 Vol.35 No.4

Background: Laser resurfacing has beneficial effects in the treatment of several skin problems such as acne and chicken pox scars. Recently pulsed erbium YAG laser has been used for skin resurfacing, but not enough is known about the scientific basis of such treatment. Objectiye : The purpose of the study was to assess the macroscopic and microscopie changes after irradiation with the pulsed Er-YAG laser. Methods : We did two tests on guinea pig skin, First, the laser was used to irradiate the skin of a guinea pig with the intensity of 500 mJ, 5 watt until pinpoint bleeding began. Skin biopsies were performed immediately, one, two and four weeks after the irradiation. Second, the laser was used to irradiate the skin of a guinea pig with the intensity of 300mJ(3watt), 500mJ(5watt), 700mJ(7watt) until pinpoint bleeding began, Skin biopsies were examined immediately, one, two and four weeks after the irradiation. Results : 1. Histological changes to the dermis over time after laser irradiation with 500 mJ, 5 watt are as follows: After one week, complete reepithelization and proliferation of the blood vessels within the dermis occured. A reaction of th dermis which consisted of newly formed collagen and was distinguisbed from the lower dermis was also examined. The reaction was rnost active after two weeks and lasted up to four weeks. 2. Histological changes to the dermis over time after laser irradiations with different intensities of 300 mJ(3watt), 500 mJ(5watt), and 700 mJ(7watt) are as follows : In all the cases of laser irradiation with different intensities, edema, neovascularization and fine collagen fiber in the upper dermis were observed. At higher intensities, the dermal reactions were stronger and were sustained for a longer time. Conclusion : Pulsed erbium YAG laser had effects on the epidermis and dermis. Therefore, pulsed erbium YAG laser can be used for skin resurfacing effectively and safely. (Kor J Dermatol 1997;35(4): 851-659)

ESL 학습자의 학문적 읽기에서 나타난 어휘학습전략의 비교연구

양재석(Jae seok Yang) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.5

이 연구는 ESL 학습자들을 대상으로 L2 학문적 읽기 과정에서 나타나는 어휘학습전략을 비교 연구하였다. 총 8명의 참여자는 어휘규모수준과 전략사용 빈도의 결과를 바탕으로 네 개의 집단으로 구성하였으며, 각각 학업적 읽기를 실시하여 전략사용양상을 질적분석하였다. 어휘수준 시험(Vocabulary Size Test), 사전-사후 심층 면접, 관찰노트, 사고구술법 (think-aloud protocol)에서 수집된 자료를 바탕으로 분석한 주요 결과, 전략사용이 높고 상위수준의 어휘실력을 가진 학습자들의 경우 다수의 전략을 순차적이고 조합적인 방식으로 사용할 뿐만 아니라 학습자 개개인의 사전지식과 필요 및 과업의 특징에 따라 전략을 사용하는 것으로 나타났다. 반면에 전략사용이 낮은 학습자들의 경우 단편적이며 비순차적으로 어휘전략을 사용하였다. 학업적 읽기에서 어휘학습자의 전략적 학습행동 양상 및 특징에 대한 연구결과를 바탕으로 ESL 읽기교육에 적용할 수 있는 방안을 모색하였다. This study describes how tertiary ESL speakers having different vocabulary proficiency and strategy use take strategic approaches to learn vocabulary when they are engaged in L2 academic reading. Depending on their VLS use and vocabulary size level, eight participants were divided into four groups. Based on the data collected from the Vocabulary Size Test (VST), pre and post-task interviews, observation notes, and think-aloud protocols, the key findings revealed that the highly active strategy users having high vocabulary proficiency tend to orchestrate multiple strategies in a combinatorial or sequential fashion. This in turn depended on the task, needs, and prior knowledge of these users. On the other hand, the less active strategy users were inclined to employ isolated and non-sequential strategy in L2 reading. This implies that vocabulary instructors should encourage users with less active strategy to broaden their repertoire of strategies and use them in sequential ways to compensate for their lower vocabulary knowledge in L2 academic reading.

항에리트로포에틴 (Anti-erythropoietin) 항체에 의한 진성 적혈구계 무형성증 (Pure Red Cell Aplasia) 2예

양재석 ( Jae Seok Yang ),이정은 ( Jung Eun Lee ),박동준 ( Dong Jun Park ),성은영 ( Eun Young Seong ),주권욱 ( Kwon Wook Joo ),안규리 ( Cu Rie Ahn ),한진석 ( Jin Suk Han ),김성권 ( Suhng Gwon Kim ),조한익 ( Han Ik Cho ),이정상 ( Ju 대한신장학회 2004 Kidney Research and Clinical Practice Vol.23 No.5

혈액투석 : 혈액투석 환자들에서 hypoxia inducible factor-1 (HIF-1a)의 임상적 의미

양재석 ( Jae Seok Yang ),황영환 ( Young Hwan Hwang ),김성균 ( Seong Kyun Kim ),김세중 ( Se Joong Kim ),정진룡 ( Zhen Lon Zheng ),김예경 ( Ye Kyung Kim ),이현희 ( Hyun Hee Lee ),주권욱 ( Kwon Wook Joo ),정우경 ( Woo Kyung Chung 대한신장학회 2008 춘계학술대회 초록집 Vol.28 No.1

무선 인터넷 기반의 효율적인 주차 관리 시스템의 설계 및 구현

양재석(Yang Jae-Seok),진명관(Jin Myoung-Kwan),김경남(Kim Gyoung-Nam),강봉남(Kang Bong-Nam),김도현(Kim Do-Hyeun),변상용(Byun Sang-Yong) 한국콘텐츠학회 2005 한국콘텐츠학회 종합학술대회 논문집 Vol.3 No.2

최근 차량의 급증으로 인한 주차 관리가 많이 힘들어지고 있다. 특히 몇 년 사이 엄청난 차량증가로 인해 주차 시설 부족 및 관리원들의 단속을 피한 다양한 위법행위가 발생하게 되었다. 본 논문에서는 이러한 변화에 따라 효율적인 주차 관리를 하기 위한 무선 단말기를 이용한 효과적인 주차 관리 시스템을 설계하고 구현한다. 이 시스템은 서버와 관리자, 무선 인터넷 단말기(PDA) 세 부분으로 구성되어 있으며, 주차 관리원들은 주차단속 및 차량관리 등을 무선 인터넷 단말기를 통해 서버에 접속하여 신속하게 서비스를 받을 수 있다. Recently, a parking administration are more difficult because the number of cars is rapidly increasing. In particular, the number of cars, grows rapidly for years, it has arisen that a variety of violation avoids the officers' observation and that a parking place is not enough. In this paper, we design and implement a parking administration system using wireless Internet in order to efficiently control parking and administration. The implemented parking administration system consists of a server and PDA clients. The officers in charge of parking managements can receive the services promptly.

후기 분만 후 자간증 1례

양재석 ( Jae Seok Yang ),김수경 ( Soo Kyung Kim ),전영미 ( Young Mi Jeon ),홍서유 ( Soe You Hong ),박철홍 ( Cheol Hong Park ),신정환 ( Jung Hwan Shin ) 대한주산의학회 2003 Perinatology Vol.14 No.3

산전 진찰의 기술이 발달하고 자간증의 발생 비율이 점차 감소하고 있으나, 후기 분만 후 자간증의 발생률은 증가하는 양상을 보이며 그 예방도 쉽지 않다. 더구나, 분만 전에 전자간증의 증세가 전혀 없는 경우는 후기 분만 후 자간증의 진단과 예방이 어렵다. 본원에서는 분만 전에 전자간증으로 진단 받지 않았던 산모가 조산으로 분만 후 7일째 경련 등 자간증의 증세를 보인 후기 분만 후 자간증 1례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Although the technique of antenatal care is developed, the incidence of late postpartum eclampsia has been increased and its prevention is difficult. In addition, the diagnosis is more difficult if the patient did not show any symptoms of preeclampsia before delivery. We described one case of late postpartum eclampsia that occurred on 7th day after preterm delivery and has not been diagnosed before delivery including a review of this literature.

ABO 혈액형 부적합 신장이식

양재석 ( Jae Seok Yang ) 대한신장학회 2011 Kidney Research and Clinical Practice Vol.30 No.4

무배란 환자에서 Anastrozole과 Clomiphene citrate의 임상 성적 비교

양재석 ( Jae Seok Yang ),유이화 ( Yoo E Hwa ),이진용 ( Jin Yong Lee ),홍서유 ( Seo Yoo Hong ),신정환 ( Jung Hwan Shin ),박철홍 ( Cheol Hong Park ),박은주 ( Eun Joo Park ),서용수 ( Yong Soo Seo ),박원일 ( Won Il Park ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.8

목적: 배란 유도에 있어서 Anastrozole의 특성과 효과를 Clomiphene citrate와 비교 분석함으로써 Anastrozole의 임상적 이용 가능성을 알아보는 것이다. 연구 방법: 60명의 불임여성을 무작위로 Anastrozole 1㎎, 2㎎, 4㎎ 투여군과 Clomiphene citrate 100㎎ 투여군으로 나누어 각각 15명씩 배정하여 5일간 투약하였다. 각 군별로 월경주기 3일째, 5일째, 8일째에 혈중 estradiol, testosterone, FSH, LH를 측정하였고, hCG 투여일에 estradiol을 추가로 측정하였다. 배란율, 우성난포의 개수, 자궁내막의 두께, 임신 성공률을 각 군별로 비교 분석하였다. 결과: Anastrozole은 Clomiphene citrate와 비교하여 estradiol, testosterone, LH의 혈중 농도에서 차이가 없었다. Anastrozole 4㎎ 투여군에서 월경주기 8일째 측정한 혈중 FSH의 농도가 Clomiphene citrate 투여군보다 높았다 (p<0.05). 자궁 내막의 두께는 Anastrozole 투여군에서 Clomiphene citrate 투여군보다 두꺼웠다 (p<0.05). 우성난포의 개수는 Clomiphene citrate 투여군 (1.56개)에서 Anastrozole 투여군(1.0-1.1개)에 비해 증가된 양상을 보였으나 통계학적 차이는 없었다. 배란율, 임신율에 있어서는 차이가 없었다. 결론: Anastrozole은 Clomiphene citrate와 비교하여 볼 때 배란 유도 성적이 비슷한 것으로 추정된다. 그러나, 1㎎ 혹은 2㎎ 투여시에는 배란율이 Clomiphene citrate에 못 미치므로 자궁내막이 얇거나 난소과자극증후군의 가능성이 높은 환자에게 선택적으로는 사용이 가능하나 모든 무배란 환자에게 일차약으로 사용하는 데는 무리가 있다고 생각된다. Objective: To compare the clinical effectiveness of Anastrozole in ovulation induction with that of clomiphene citrate. Methods: Sixty anovulatory women were randomly divided into 4 groups (1 ㎎, 2 ㎎ and 4 ㎎ of Anastrozole groups and Clomiphene citrate group). The ovulation induction was tried with 3 dosages of Anastrozole or 100 ㎎ of Clomiphene citrate for 5 days. The serum level of estradiol, testosterone, FSH and LH were serially monitored (on 3rd, 5th and 8th days of treatment). Serum estradiol level at the time of hCG injection was also measured. Ovulation rate, number of dominant follicles, endometrial thickness, and pregnancy rate were measured and compared across the study groups. Results: There was no statistically significant difference in estradiol, testosterone, or LH level between women treated with Anastrozole and Clomiphene citrate. In patients treated with 4 mg of Anastrozole, serum FSH level was higher than that of the women treated with Clomiphene citrate (P<0.05). Endometrial thickness was greater in patients treated with Anastrozole than women treated with Clomiphene citrate (P<0.05). Number of dominant follicles in patients treated with Clomiphene (1.56) was slightly greater than in women treated with Anastrozole (1.0-1.1), but there was no statistically significant difference. Conclusion: Anastrozole had similar clinical effectiveness in ovulation induction when compared to Clomiphene citrate. At 1 ㎎ or 2 ㎎ of Anastrozole, ovulatory rate remained below the effectiveness of Clomiphene citrate, therefore considering the expensive cost of Anastrozole, it should not be considered as first-line medication for ovulation induction but reserved for those who have certain conditions such as thin endometrium and polycystic ovarian syndrome.

고등학생들의 의사결정 유형과 진로미결정 유형간의 관계

강재태(Jae Tae Kanng),양재석(Jae Seok Yang) 한국직업교육학회 2001 職業 敎育 硏究 Vol.20 No.2

The purpose of the study was to understand the type of decision-making and career indecision of high school students and to provide basic data for career guidance and counseling. To investigate the objectives of the study, 650 high school students in Gyeongsangnam-do were sampled at random in consideration of the sex(male, female), grade(the first, the second and the third grade in high school), major part(liberal high school, vocational high school), and a survey on the type of decision-making, type of career indecision and on personal matters was conducted. The results of the study suggest that the career counselor should have an overall understanding of the student in question, grasp the type of decision-making and career indecision, thus making a differentiated diagnosis and treatment suited to each and every student client taking into consideration the client`s psychological and non-psychological variables, in making plans for career guidance and counseling. The findings particularly show that the cultivation of the capability to make reasonable decision-making reduces instances of career indecision of high school students while at the same tme raising incidences of career decision-making.

후천성 반응성 천공성 교원증 3예

강병덕,양재석,김일환,송해준,오칠환 ( Byung Duk Kang,Jae Seok Yang,Ill Hwan Kim,Hae Jun Song,Chil Hwan Oh ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.1

Reactive perforating collagenosis(RPC) is a rare perforating disorder characterized by transepithelial elimination of altered collagen. Two types of RPC occur:inherited and acquired. The acquired type arises during adult life without a familial tendency. It is accompanied by scratching and usually is associated with diabetes mellitus, chronic renal failure, lymphoma and AIDS. We report three cases of the acquired form of RPC. Pruritus was the common factor among them. In two patients, chronic renal failure and hyperthyroidism were associated with RPC. Histopathological and ultrastructural findings showed transepithelial elimination of collagen. Control of itching was helpful for clearing the lesions.(Kor J Dermatol 1997;35(1):204∼208)