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외부전계 인가에 의한 조화용융조성 LiNbO<sub>3</sub> 결정의 주기적 분극반전
권순우,양우석,이형만,김우경,이한영,윤대호,송요승,Kwon, Soon-Woo,Yang, Woo-Seok,Lee, Hyung-Man,Kim, Woo-Kyung,Lee, Han-Young,Yoon, Dae-Ho,Song, Yo-Seung 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.11
When an electric field higher than a characteristic coercive field is applied to a ferroelectric such as $LiNbO_3$, the orientation of the spontaneous polarization is reversed, which causes the reversal of the sign of odd-rank tensor properties such as electro-optic and nonlinear optic coefficients. A fabrication process of insulator and periodic external field assisted poling of a z-cut $LiNbO_3$ have been optimized for a periodic $180^{\circ}$ phase inversion along z-axis. The poling jig and the poling control system, fully controlled by a computer, for high quality and reproducible PPLN fabrication have been devised. Periodically polarization reversed PPLN was adjusted based on the fabricated thickness of insulator. The poling structure of PPLN was observed under a microscope after etching PPLN samples by an etching solution ($HF:HNO_3$ = 1 : 2) for about 15 min.
청각장애학생의 고등학교 통합교육 환경에서의 학교생활 적응에 대한 사례 연구
권순우(Soon-Woo Kwon) 한국언어치료학회 2004 言語治療硏究 Vol.13 No.2
To adapting school life of students with hearing impairment who are placed in inclusive settings, it need to be required for them natural communication skill and above the average academic achievement. However, The level of low academic achievement and restricted communication skill bring about psychological conflicts and keepbad company in their school life. Therefore, they are to be have a difficulty in adapting their school life. The more the grade promote up, such a existing circumstances is the more deepen. The participant of the study was in A special school from kindergarten to middle school class, and then, have worked at high school inclusive settings for three years. The study is to reveal how to adapt high school life by employing H student who is now attending department of special education in D university, and is freshman.
첫 번째와 두 번째 청각장애 자녀의 출산과 양육에 대한 어머니의 인식 비교
권순우(Soon-Woo Kwon),김영한(Young-Han Kim) 한국언어치료학회 2004 言語治療硏究 Vol.13 No.1
The purpose of this study is to find out what the mother who should bringing up their children with hearing impairment have any burden and in rearing up, what mothers have important educational goals and educational activities at home.To achieve the purpose of this study, this study are gathered data through deep interview to two mothers of children with hearing impairment who have educated at M school. Maternal rearing experience with children with hearing impairment not only serve critical information, but also, itself is to be important guide for education and rehabilitation of children with hearing impairment.Therefore, this study are compared with between maternal rearing experience who have experienced the first children with hearing impairment and who have experienced the second children with hearing impairment through deep interview.This study helps mother with children with hearing impairment reasonably understand and copy with their children's disability.
청각장애학생의 과정별 학교교육 상황에 대한 종단적 사례 연구
권순우(Soon-Woo Kwon),김병하(Byung-Ha Kim) 한국언어치료학회 2004 言語治療硏究 Vol.13 No.3
Students with hearing impairment who are included regular school faced many difficulties in academy achievement, limitation of communication with other students, and poor at relation to a school fellow and so on. Such a phenomenon is that the more they are grade up, the more further they become. Therefore, It require for students with hearing impairment who are included regular education environment to adapt the school to be over average academy achievement, good communication competence and so forth. The participant of this study, who had gone to special school from kindergarten to middle school, and then had gone to regular high school, completing regular high school, present is attending at department of special education, freshman, D university. The aims of this study is to reveal difficulties in adaption to school curriculum be faced to student with hearing impairment who is going D university via special education and regular school through longitudinal case study. The conclusion of this study showed that after brought up the sentence·reading ability through the habit of reading book from in young days, what self initiative learning can be done make one to be key of success, and ongoing self development under the confirmatory belief about what to be make one to be succeed as well.
참관실습에서 나타나는 예비특수교사의 장애학생에 대한 인식 및 관계 변화에 대한 질적 연구
권순우 ( Soon Woo Kwon ),정병종 ( Byung Jong Jeong ) 한국정서.행동장애아교육학회(구.한국정서학습장애아교육학회) 2010 정서ㆍ행동장애연구 Vol.26 No.4
본 연구는 참관실습이 예비특수교사들에게 특수교육에 관련된 다양한 문제인식을 변화시킬 수 있는 계기가 될 수 있는지 탐색해 보았으며, 질적 연구방법을 사용하였다. 연구 자료는 구조화된 질문지, 면담, 참관실습 일지를 통해 수집되었으며, 이외에도 여러 가지 문서들을 활용하였다. 본 연구는 예비특수교사들이 참관실습을 통해 장애학생에 대한 어떤 인식변화와 관계 변화를 겪게 되는지와 참관실습의 운영에 있어서 문제점과 개선 방안을 알아보았다. The purpose of this study was to investigate whether the field observation practice provides would-be special education teachers with a chance to change their awareness relating to special education. A qualitative research method was used for this study. Data was collected by a structured questionnaire, interviews, field observation practice journals, and other documents. The results of this study informed us what change of awareness about, and relationship with, students with special needs would-be special education teachers experience through the field observation practice. It also informed us problems in the process of the field observation practice and strategies to solve them.
마인드 맵을 통한 언어지도가 청각장애 학생의 어휘력 향상에 미치는 효과
권순우(Soon-Woo Kwon),윤병천(Byung-Cheon Yoon) 한국언어치료학회 2003 言語治療硏究 Vol.12 No.2
Students with hearing problem is poor at vocabulary comparing to peer, so occur difficult situation not only daily life but all learning place.It is very important for them to be taught how to enrich vocabulary and searched several strategies.Therefore this study is meaningful to conduct if Mind Map gives lots of influence to students with Hearing Problem in the parts of Vocabulary.
학교 중심 교육과정 개발 과정과 개발된 프로그램의 주요 특성 연구
권순우(Soon-Woo Kwon),김병하(Byung-Ha Kim) 한국언어치료학회 2005 言語治療硏究 Vol.14 No.2
The purpose of this study is find out how school-based curriculum have developed, and to look into key characteristics of developed program by comprehensive approaching in the process of curriculum development of A school. Key characteristics of education program which have developed for school-based curriculum in A school are as follows; ① knowing me-identifying self-concept, ② setting up me-facilitating basic academic, ③ realizing our-community education, ④ setting up our-knowing education what we are, ⑤ education friendly with nature. A school for the hearing impaired go on implementing comprehensive education program including above mentioned 5 contents.
권순우 ( Soon Woo Kwon ),고현주 ( Hyun Ju Ko ),배준태 ( Jun Tae Bae ),김진화 ( Jin Hwa Kim ),이근수 ( Geun Soo Lee ),표형배 ( Hyeong Bae Pyo ) 대한화장품학회 2016 대한화장품학회지 Vol.42 No.1
Pectin은 식물 세포벽의 주요성분으로 과실이나 채소류의 세포막이나 세포막 사이의 엷은 층에 존재하며, 고점도의 수용성 다당체로 염과 pH에 의한 점도 변화가 심하며, 알코올류와 만나 gelation 되는 특징을 가지고 있다. 식품분야에서 펙틴은 점도의 증가 및 겔 형성제로 사용되어 왔으나, 화장품 분야에서는 그 사용이 극히 제한적이었다. 본 연구에서는 pectin 효소 분해물의 분해 정도 및 분자량 분포를 정확히 확인하기 위해, HPLC (GPC)를 이용한 분석 조건을 확립하였으며, 생물 전환 공정을 통해 저분자량 pectin oligomer가 형성되는 것을 확인하였다. 그리고, 2종의 효소에 대한 저분자량 pectin oligomer 생산 최적 조건 실험을 진행하여 최적 생산 조건을 확립하였으며, 이로 부터 제조한 pectin 효소분해물에서 저분자량 pectin oligomer를 선별적으로 분리하는 공정도 개발하였다. 이러한 공정을 통해 제조된 저분자량 pectin oligomer 소재 LMPH A 와 B는 약 200 ∼ 2,700 Da 정도의 분자량 분포를 가지는 것으로 확인되었다. LMPH A와 B의 생리활성을 확인한 결과, 2종 모두 항산화 활성을 보였다. 게다가, 이들이 pectin 및 D-galacturonic acid 보다 상대적으로 우수하며, 농도의존적으로 증가함을 보였다. 또한 자외선(UVB)에 의한 피부세포의 광손상 및 이로 인한 apoptosis를 방어하는 효과를 나타내었다. 세포 활성화 효과 측정결과는 LMPH A, B 모두 0.025% 이상의 농도에서 세포 활성화 효과를 보였으며, 농도가 0.5%에 이를 때까지 농도 의존적으로 증가하는 것을 확인할 수 있었다. 특히, LMPH B의 경우, 0.5% 농도에서 약 30%, LMPH A도 약 22%의 매우 우수한 세포 활성화 효과를 가지는 것으로 확인되었다. 결론적으로, 본 연구를 통해 개발된 2종의 LMPH가 우수한 생리활성과 동시에 우수한 안전성을 보임으로써, 향후 화장품 소재로 응용 가능성이 매우 높을 것으로 기대된다. Pectin, a naturally occurring polysaccharide, has in recent years attracted considerable attention. Its benefits are increasingly appreciated by scientists and consumers due to its safety and usefulness. The chemistry and gel-forming characteristics of pectin have enabled to be used in pharmaceutical industry, health promotion and treatment. Yet, it has been rarely used in cosmetics because of its incompatibility with many cosmetic ingredients, including alcohols, and unstable viscosity of pectin gels under various pH and salt conditions. However, low-molecular-weight pectin oligomers have excellent biological activities, and depolymerization of pectin to produce cosmetic ingredients would be very useful. In this study, we attempted the development of cosmetic ingredients using pectin with an excellent effect on human skin. We developed a bio-conversion process that uses enzymatic hydrolysis to produce pectin hydrolysates containing mainly low-molecular-weight pectin oligomers. Gel permeation chromatography was used to determined the ratio of hydrolysis. The molecular weight of the pectin hydrolysates obtained varied between 200 and 2,700 Da. The two newly developed low-molecular-weight pectin hydrolysates, LMPH A and B, had higher anti-oxidative activities than pectin or D-galacturonic. Exposure to UVB radiation induces apoptotic cell death in epidermal cells. Annexin V binding and propidium iodide uptake were measured by flow cytometry to evaluate UVB-induced cell death in HaCaT cells. Both LMPH A and B reduced UVB-induced cell death and increased cell proliferation by 22% and 30% at 0.5% concentration respectively, while pectin had no significant activity. In conclusion, this study suggests that the newly developed low-molecular-weight pectin hydrolysates can be used as safe and biologically active cosmetic ingredients.
청각장애 대학생의 경험에 기초한 독해력 및 문장력 향상을 위한 교수-학습 전략 탐색
권순우(Soon-Woo Kwon) 한국언어치료학회 2005 言語治療硏究 Vol.14 No.1
The purpose of this study is to offer basic data which benefit students with hearing impairment to elevate ability to read and understand, and ability to compose, by rethinking direction for their language instruction through finding out various learning methods which helped them acquire present comprehension and composition, and analyzing it. The subject was selected 3 students with hearing impairment who attend C., D., N., university. The teaching and learning strategies for improving their comprehension and composition drawn from this study are as follows; First, it should be focus learning methods upon a system organically such as making it holistic approaches. Second, it should be developed various reading instruction program fitting to them. Third, in curriculum management, it should be shift curriculum management to inclusive theme under the school circumstance. Fourth, it should be done multi-media approach applying various media materials for problems solving. Fifth, it should be stressed necessity of various language instruction for students with hearing impairment.