외부전계 인가에 의한 조화용융조성 LiNbO₃ 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.

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.

청각장애 대학생의 학습 지원 실태와 만족도에 관한 사례 연구

권순우 ( Kwon Soon Woo ) 대구대학교 한국특수교육문제연구소 2017 특수교육저널 : 이론과 실천 Vol.18 No.1

본 연구는 청각장애 대학생들의 학습 지원 실태와 만족도에 대한 정도를 알아보고, 그들에게 적절한 학습 지원을 제공하고, 그에 대한 만족도를 높이고자 한다. 본 연구에서 개별면담과 심층면접을 통해 청각장애 대학생들의 교수-학습을 위한 적절한 지원 방향과 만족도를 높이는 방법을 모색하고자 청각장애 대학생 3명이 참여하였다. 본 연구를 통해 얻어진 결과는 다음과 같다. 첫째, 청각장애 대학생의 학습지원 실태 중 강의와 관련된 내용으로 수어통역을 받고 있는 과목은 별 어려움 없이 수업 내용을 대부분 잘 전달받는 것으로 나타났다. 하지만 이과계통의 청각장애 재학생들은 상대적으로 많은 어려움을 겪는 것으로 나타났다. 강의 외의 내용으로는 연구 참여자 모두 의사소통의 어려움을 다수 겪는 것으로 나타났다. 따라서 청각장애 학생들은 학교에서 하는 모든 활동들에 대해 국가적인 차원에서 학교와 연계하여 다양한 통역 서비스를 제공해 주기를 희망하고 있다. 둘째, 청각장애 대학생의 학습 지원 실태 중 수업 및 학습 지원과 의사소통 지원에 있어서 3명의 연구 참여자 모두 대부분 만족하고 있는 것으로 나타났다. 특히, 수어통역과 속기통역에 대한 만족도가 매우 높았으며, 그 외에도 전자출결 시스템, 복지장학금 제도, 수강신청 편의 등의 만족도가 높은 것으로 나타났다. 하지만 학교의 다양한 학습 지원을 하고 있는 것과 대조적으로 교·강사에 대한 만족 정도는 연구 참여자 3명 모두 매우 낮은 것으로 나타났다. 그 이유로 첫째 강의 내용의 다양성 부족, 둘째 재미있고 흥미있는 수업 진행 요구, 셋째 청각장애 학생의 기본적인 특성이나 문화를 이해하지 못하는 것 등으로 제시하였다. The purpose of this study is to investigate degrees of satisfaction of the hearing impaired college students in order to provide appropriate learning support for them and to improve their satisfaction. Three college students with hearing impairment participated in this study, with whom we attempted to identify how to improve the direction and satisfaction of appropriate support in teaching and learning for hearing impaired college students through individual and in-depth interviews. The results of this study are as follows. First, as for the lecture-related learning support for college students with hearing impairment, the subjects received contents of lectures without difficulty when sign language interpretation was provided during the lectures, while those studying natural sciences had relatively much difficulty in following lectures. In terms of contents besides lectures, all the subjects frequently felt difficult in communication. The students in consequence wanted a wide range of interpreter services provided by their college at national level in all the activities at school. Second, as for the supports of lectures, learning, and communication, all the three participants were mostly satisfied with the items. They felt particularly satisfied with sign language and shorthand interpretation, followed by electronic attendance-absence recording systems, need-basis scholarship, and convenience of signing-up courses. However, despite their contentment in varied learning support in school, all the three participants showed extremely lower satisfaction with professors and instructors, presenting three reasons―lack of diversity in lecture contents, shortage of interest and attraction in lecturing, and failure to understand basic traits or culture of students with hearing impairment.

수화 이름에 대한 분석

권순우(Kwon Soon-Woo),권순복(Kwon Soon-Bok),박정식(Park Jung-Sik) 한국재활과학회 2003 難聽과 言語障碍 Vol.26 No.2

The purpose of this study is find out the characteristics on SLN(Sign Language Name) of Students with hearing impairment who attend school for the deaf and teachers who work in school for the deaf and examine the strength and weakness as their viewpoint on SLN(Sign Language Name) and check up how to improve the issues on their SLN(Sign Language Name). To achieve this purpose, this study are employed 100 students with hearing impairment and 40 teachers. Because current using SLN(Sign Language Name) is that the emphasis focused upon the scar and weakness or the specific part of face or body, there appear many issues. This study suggest that we should have consideration for giving bright, sound, beautiful SLN(Sign Language Name) of content like oral name when give SLN(Sign Language Name).

화학반응을 고려한 스토커식 소각로의 3차원 모사연구

권순우 ( Soon Woo Kwon ),이종협 ( Jong Heop Yi ) 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.3

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.

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.

청각장애 학생의 어휘력 향상을 위한 교수-학습 전략 탐색

권순우(Soon-Woo Kwon) 한국언어치료학회 2004 言語治療硏究 Vol.13 No.4

The purpose of this study is to offer basic data which benefit students with hearing impairment to elevate vocabulary ability, by rethinking direction for their language instruction through finding out various learning methods which helped them acquire present vocabulary ability 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 vocabulary ability drawn from this study are as follows; First, it should be focus various language knowledge upon making a system organically. Second, it should be put on relative importance at reading guidance. Third, it should be make longer real experience opportunity. Fourth, it should be developed materials as active-opened attitude. Fifth, it should be done language education as trait of students with hearing impairment.

청각장애 학교교육과정 실행 결과의 평가

권순우(Soon-Woo Kwon) 한국언어치료학회 2005 言語治療硏究 Vol.14 No.3

The study is to find out what are educational outcomes, after applying programs developed for restructuring school curriculum of deaf school. The educational outcomes are as follows; ① maintenance of the bright face and establishment of self-identification, ② philosophical reformation in school based curriculum for the deaf, increase of competencies, ③ increase of the literacy ability, ④ increase of the intimate spirits in environments for the deaf as ecological approach and making togetherness of peer group. ⑤ assimilation of the teaching experiences of the senior teachers for the deaf.The demerits of the educational outcomes which mean problems for guarantee the effective school curriculum are as follows; ① difficulties in teaching between beginning teachers and skilled teachers ② difficulties in decreasing of the teaching hours, payment of the teaching allowance both the two teachers in cooperation teaching of the same class, ③ difficulties in managing teaching hours and managing teaching of teachers in subject-centered teachings, ④ have a crisis in self-esteem due to difficulties in expressing their manpower.

귤피 펙틴 유래 효소적 가수분해물의 세포 보호 효과

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.