SiO₂, SnO₂ 코팅된 청색 CoAl₂O₄ 안료의 색상, 물성 평가 연구

윤지연,유리,피재환,김유진,Yun, JiYeon,Yu, Ri,Pee, Jae-Hwan,Kim, YooJin 한국분말야금학회 2014 한국분말재료학회지 (KPMI) Vol.21 No.5

This work describes the coloration, chemical stability of $SiO_2$ and $SnO_2$-coated blue $CoAl_2O_4$ pigment. The $CoAl_2O_4$, raw materials, were synthesized by a co-precipitation method and coated with silica ($SiO_2$) and tin oxide ($SnO_2$) using sol-gel method, respectively. To study phase and coloration of $CoAl_2O_4$, we prepared nano sized $CoAl_2O_4$ pigments which were coated $SiO_2$ and $SnO_2$ using tetraethylorthosilicate, $Na_2SiO_3$ and $Na_2SiO_3$ as a coating material. To determine the stability of the coated samples and their colloidal solutions under acidic and basic conditions, colloidal nanoparticle solutions with various pH values were prepared and monitored over time. Blue $CoAl_2O_4$ solutions were tuned yellow color under all acidic/basic conditions. On the other hand, the chemical stability of $SiO_2$ and $SnO_2$-coated $CoAl_2O_4$ solution were improved when all samples pH values, respectively. Phase stability under acidic/basic condition of the core-shell type $CoAl_2O_4$ powders were characterized by transmission electron microscope, X-ray diffraction, CIE $L^*a^*b^*$ color parameter measurements.

개인적 여가와 사회적 여가의 선순환: 여가재능나눔을 통한 여가강박의 해소

윤지연,최승혁,허태균 여가문화학회 2013 여가학연구 Vol.11 No.1

This study investigated how the increased leisure time due to the forty-hour work week could influence parents' leisure-obsession, and explores whether the Leisure Talent Sharing Program(LTSP) could release the leisure-obsession. 300 married adults with offsprings were asked to complete the scales of family leisure satisfaction, leisure-obsession, intention of participation to LTSP, reasons for the participation, and expected pros and cons of the program. 200 students answered to the question how specialized the talent donor was. The results showed that the forty-hour work week was related to increase of leisure-obsession. Also, among the potential influential variables, only the leisure-obsession influenced the intention of participation to LTSP. The higher leisure-obsession participants had, the more intention of participation to LTSP they showed. In addition, the main reasons for the participation were for social contribution and sharing. Also, there were disparities between the expertise of talents that potential donors could provide and that of children and parents wanted in the program. Expected advantages of LTSP were found as diverse experience, self-development of children, and decrease of financial burden. On the other hand, disadvantages were concern about the quality, management of the program, and time pressure. The results imply that LTSP could be a valuable potential remedy for leisure-obsession and propose how it should be structured. The possibilities of the beneficial connection between individual leisures and social system were discussed. 본 연구는 주40시간 근무제의 실시로 인해 증가한 여가시간이 학부모의 여가강박에 어떠한 영향을 미치는지 확인하고, 여가재능나눔 프로그램이 여가강박을 해소시켜줄 수 있는 대안이 될 수 있는지 탐색하고자 수행되었다. 이를 위해 서울⋅경기권에서 표집된 300명의 학부모들에게 인구학적 변인들, 주40시간 근무제 시행여부, 가족여가만족도, 여가강박, 여가재능나눔 프로그램 참여의향 및 참여이유, 그리고 참여 시 예상되는 장단점 등에 응답하게 하였고, 200명의 중학생들에게는 여가재능나눔 프로그램 참여시 배우고 싶은 지도자 수준에 대하여 질문하였다. 연구 결과, 주40시간 근무제의 실시는 여가강박을 증가시키는데 영향을 주는 것으로 나타났다. 또한, 주요 인구학적변인, 주40시간 근무제, 가족여가만족도, 여가강박 중 여가재능나눔 프로그램 참여의향에 영향을 미치는 것은 여가강박뿐이었다. 즉, 여가강박이 높을수록 여가재능나눔 프로그램 참여의향이 높은 것으로 나타났다. 참여이유로는 ‘사회기여’ 및 ‘나눔’때문이라는 응답이 가장 많았고, 재능기부 수준에 대해서는 자신의 기부 가능한 재능 수준, 아이들이 희망하는 재능기부자의 전문성 수준 및 학부모들이 희망하는 재능기부자 전문성 수준 간에 차이가 있었다. 여가재능나눔 프로그램 활성화 시 예상되는 장점으로는 ‘다양한 체험’, ‘자녀의 자기개발’, ‘경제적 부담 감소’ 등을, 단점으로는 ‘프로그램의 질 및 운영에 대한 우려’, ‘시간적 부담’ 등을 주로 거론하였다. 본 연구의 결과는 여가재능나눔 프로그램이 여가강박을 해소하는 방안이 될 수 있음을 시사하고, 프로그램 활성화를 위한 구체적 방향성을 제시했다는 의의가 있다. 이 외 본 연구의 의의 및 제한점, 그리고 추후 연구방향에 대해 논의하였다.

약인성 질환의 상담 사례 및 상담 방법

윤지연 한국병원약사회 2009 병원약사회지 Vol.26 No.3

유창성 실어증 환자의 이야기 결속표지 사용 특성

윤지연,이윤경,Yoon, Ji-Yeon,Lee, Yoon-Kyoung 한국음성학회 2005 음성과학 Vol.12 No.4

The purpose of this study was to investigate the characteristics for cohesion in the narratives of fluent aphasics. Ten fluent aphasics and ten normal adults matched chronological-age and education level with aphasics participated in this study. Story retelling task was given to the participants individually. And all narratives they produced were recorded and transcribed for analysis. The frequency of cohesive markers and the rate of accuracy were analyzed. The result were as follows; (1) The fluent aphasics used cohesive devices significantly less than the normal adult group, and the rate of accuracy of cohesive devices used was lower than the normal adults. (2) Both groups used lexical cohesion more than pro-forms and ellipsis, and the difference of two groups was larger in lexical cohesion than pro-forms and ellipsis. (3) The fluent aphasics used lexical cohesion more accurately than pro-forms and ellipsis but the normal adults used all three cohesive markers accurately. The difference of two groups was large in pro-forms and ellipsis.

소아(小兒) 한증(汗症)에 대한 임상적(臨床的) 고찰(考察)

윤지연,김윤희,Yoon, Ji-Yeon,Kim, Yun-Hee 대한한방소아과학회 2003 대한한방소아과학회지 Vol.17 No.1

The purpose of this study was to evaluate clinical characteristic and correlation with growth and weakness of children with excessive sweating. The study was progressed in children with excessive sweating who visited Dong-Eui Oriental Medical hospital from may to june, 2003. The results were as follows: 1. The growth numerical value on height and weight of children with excessive sweating was normal range ( height: p-value=0.089 >0.05, weight: p-value= 0.622>0.05). 2. In sweating region, head and neck 46.7%, forehead 23.3%, whole body 16.7%, back 10.0%, hand and foot 3.3%. In sweating time, sleeping 53.3%, acting 20.0%, uncertainty 20.0%, eating 3.3%, tense situation 3.3%. 3. In family history of excessive sweating, 'yes' was 65.2%, 'no' was 34.8%. 4. The growth numerical value on height did not concerned with sweating region and time, but in group in 75 marks, 'head and neck' was many. 5. The growth numerical value on weight have no concern with sweating region, but sweating time(F=3.312, p-value=0.026 <a=0.05). 6. In relationship of sweating and weakness, weak children was 22. And the frequency was respiratory system 17, digestive 4, psychoneurotic 1, There was no urinary and musculoskeletal system.

α-FeOOH 나노로드를 이용한 선명한 황색 안료 합성 연구

윤지연,유리,김유진,Yun, JiYeon,Yu, Ri,Kim, YooJin 한국분말야금학회 2016 한국분말재료학회지 (KPMI) Vol.23 No.6

In this work, we synthesize brilliant yellow color ${\alpha}$-FeOOH by controlling the rod length and core-shell structure. The characteristics of ${\alpha}$-FeOOH nanorods are controlled by the reaction conditions. In particular, the length of the ${\alpha}$-FeOOH rods depends on the concentration of the raw materials, such as the alkali solution. The length of the nanorods is adjusted from 68 nm to 1435 nm. Their yellowness gradually increases, with the highest $b^*$ value of 57 based on the International Commission on Illumination (CIE) Lab system, by controlling the nanorod length. A high quality yellow color is obtained after formation of a silica coating on the ${\alpha}$-FeOOH structure. The morphology and the coloration of the nal products are investigated in detail by X-ray diffraction, scanning electron microscopy, UV-vis spectroscopy, and the CIE Lab color parameter measurements.

COVID 19 시기의 청소년기 부모-자녀 간 의사소통 잠재프로파일 유형화와 SNS중독

윤지연,민혜영,유미선,허보연,박영민 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.5

This study was conducted to categorize adolescents' communication with their parents during the COVID-19 pandemic and to find out whether typification affects SNS addiction. To this end, Latent Classes Analysis was conducted using data from a total of 646 teenagers who responded to the 2022 Community Youth Opinion Survey conducted by Sogang University's Life Culture Research Institute, and one-way ANOVA was conducted to verify the difference between types. As a result, first, during the COVID-19 pandemic, adolescents' communication with their parents was classified into four groups, and they were named 'communication facilitation', ‘communication deficits’, 'communication intermediate', and 'momentive communication'.Second, about 80% of the total study subjects belonged to the lower-middle group in communication with parents, and communication with mothers was found to be high in all groups. Third, Among the types of adolescents' communication with their parents during the COVID-19, ‘communication deficits' showed higher levels of SNS addiction than the 'communication facilitation'', which resulted in the same results compared to the 'communication intermediate', and 'momentive communication'. Based on these research results, the importance of communication with adolescent parents was confirmed, and the direction of intervention was suggested in relation to it. 본 연구는 COVID-19 팬데믹 시기의 청소년의 부모와의 의사소통을 유형화하고, 유형 간 SNS 중독의 차이를 살펴보았다. 이를 위해, 서강대학교 생명문화연구소에서 진행한 ‘2022년 지역사회 청소년 의견조사’에 응답한 청소년 총 646명의 자료를 활용하여 잠재 프로파일 분석을 하였고 이를 통해 나눠진 유형 간 차이를 검증하기 위해 One-way ANOVA를 실시하였다. 주요결과는 첫째, 청소년을 대상으로 한 부모와의 의사소통 유형은 4개의 하위집단으로 유형화되었으며 각 프로파일의 특성을 고려하여 ‘소통취약형(9.4%)’, ‘소통 중간형(70.1%)’, ‘소통원활형(15.5%)’, ‘모편향소통형(4.3%)’으로 명명하였다. 둘째, 전체 연구 대상의 약 80%가 부모와의 의사소통에서 중간 이하의 집단에 속했으며, 유형화를 통해 도출된 네 집단에서 공통적으로 어머니와의 의사소통 수준이 높게 나타났다. 마지막으로 청소년기 부모-자녀 의사소통 유형 중 ‘소통취약형’이 ‘소통원활형’보다 청소년 자녀들의 SNS 중독 수준이 높은 것으로 나타났으며, 이는 ‘모편향소통형’과 ‘소통중간형’과의 비교에서도 같은 결과를 도출하였다. 이와 같은 결과를 토대로 청소년기 자녀의 부모-자녀간 의사소통의 중요성을 확인하였으며 개입의 방향을 제안하였다.

생균제 및 Colistin^® 복합 첨가제의 급여가 산란계의 생산성과 계란의 품질에 미치는 영향

윤지연,김재영,김지숙,이보근,안병기,황용배,강성기,김동건,강창원,Yun, J.Y.,Kim, J.Y.,Kim, J.S.,Lee, B.K.,Ahn, B.K.,Hwang, Y.B.,Kang, S.K.,Kim, D.G.,Kang, C.W. 한국가금학회 2008 韓國家禽學會誌 Vol.35 No.2

본 연구는 산란계에 Lactobacillus plantarum, Bacillus subtillis와 Aspergillus oryzae 및 colistin의 복합 첨가제를 급여하였을 때 난 생산성과 난질 및 난각질에 미치는 영향과 장내 미생물 조성, 계분 암모니아 발생량 및 난황 내 콜레스테롤 함량에 미치는 영향을 함께 조사하였다. 50주령의 Hy-Line Brown 산란계 160수를 공시하여 일반 사료(Control) 또는 0.2% 복합균종 생균제를 함유하는 실험 사료(T1, Bacillus subtilis + Aspergillus oryzae + Lactobacillus plantarum; T2, Bacillus subtilis + Aspergillus oryzae; T3, Bacillus subtilis + Aspergillus oryzae + colistin)를 8주간 급여하였다. 사료 섭취량, 난 생산성 및 간의 중량 그리고 난각 강도, 난각 두께, 난각색은 처리구 간 유의성 있는 차이가 관찰되지 아니하였다. 그러나 Haugh unit는 처리구가 Control에 비해 유의하게 높았다(P<0.05). 혈중 총 콜레스테롤 농도와 HDL 콜레스테롤은 Control에 비해 모든 처리구에서 감소하는 경향이 관찰되었으나 통계적 유의차는 없었다. 맹장 내 암모니아 농도에 미치는 영향은 Control에 비해 T1 처리구와 T3 처리구에서 유의하게 감소하는 것으로 나타났다(P<0.05). 총 균수와 lactic acid bacteria는 맹장 및 분내 모두 Control과 처리구간 큰 차이가 없었고, 맹장 및 분내의 coli forms은 Control에 비해 복합 생균제 처리구가 유의하게 낮거나(P<0.05) 낮은 경향이 관찰되었다. 4 주차와 8주차의 난황 콜레스테롤 농도는 복합 생균제 처리구가 Control에 비해 유의하게 감소하거나 감소하는 경향이 나타났다(P<0.05). 난황 중성지질과 인지질의 농도는 Control과 처리구간의 차이는 없는 것으로 나타났다. 결론적으로 본 실험을 통해서 생균제인 Lactobacillus plantarum, Bacillus subtillis, Aspergillus oryzae 그리고 항생제인 colistin으로 이루어진 복합제의 급여는 생산성과 혈액 성상에 부정적인 영향이 없이 난황 콜레스테롤과 분내 암모니아 농도를 감소시키고, 장내 coli forms를 저하시키는 결과가 관찰되었다. Colistin이라는 항생제는 생균제의 활성에 부정적인 영향 없이 생균제로만 이루어진 첨가제와 같은 효과를 내었으며, 장내 미생물 균총 조절에는 보다 효과적으로 작용하는 것으로 나타났다. 따라서 복합 생균제를 급여함으로 장내 균총과 산란계 사양에 유익한 효과를 기대할 수 있으며, colistin의 병용도 생균제의 이점을 저해하지 않는 것으로 사료된다. This experiment was conducted to evaluate the dietary effects of mixture of probiotics and colistin on laying performance, intestinal microflora and egg yolk cholesterol in laying hens. One hundred sixty 50-wk-old Hy-Line Brown layers were divided into four treatments and fed a commercial diet (Control) or experimental diets containing 0.2% mixture of probiotics or probiotics and colistin mixture (T1, Bacillus subtilis + Aspergillus oryzae + Lactobacillus plantarum; T2, Bacillus subtilis + Aspergillus oryzae; T3, Bacillus subtilis + Aspergillus oryzae+colistin) for 8 wk. No significant differences were found in laying performance and liver weight among the groups. The Haugh unit of treated groups were significantly improved (P<0.05) compared to that of control, but eggshell qualities were not changed by the treatments. The cecal ammonia concentration was significantly decreased in both T1 and T3 groups. The number of coli forms in cecal content and feces were significantly reduced in all treated groups compared to that of Control (P<0.05). The egg yolk cholesterol contents in the groups fed the diet containing mixture of probiotics and colistin were reduced in comparison with that of Control. In conclusion, dietary supplementation of mixture of probiotics and colistin improved quality of egg albumen, and reduced the egg cholesterol contents. They also reduced intestinal coli forms without harmful effects on overall productive and physiological responses in laying hens.

‘일본배낭여행’ 수강자의 자기주도성이 자아태도에 미치는 영향

윤지연,이용근,이종호 한국경영교육학회 2012 경영교육연구 Vol.27 No.3

The purpose of this study is to find the new methods and effects of Cyber-education through the actual activities at the process of cyber education. In other words, it focuses on the Self-Attitude of learner with their Self-Direction participation in real activities. "Japan Backpacking", which was operated by Cyber-education in G University, was consisted of the theoretical studies and discussions for 13 weeks. And learners had to participate in actual Backpacking for 6 days. The results of this study are different from those of theory. Passion, openness, acceptability, creativity of Self-Direction have affected on Self-Discovery. And future-oriented, problem solving skill, independence, responsibility have on Self-Esteem. Finally responsibility, passion, independence, problem solving skill of Self-Direction have on Self-Control. I can think theses results in terms of 2 aspects through this study. First, Cyber-education has many advantages as well as demerits, therefore the alternative to reinforce the strength and recover the weaknesses should include actual activities in Cyber-education. So it must provide not only the learning process in Cyber-space but also the opportunities to make practice the contents of education. Second, tour agency already uses EC. But traveler can get more informations on tour than tour agency and make reservations of the tickets, hotel etc. through Internet. So the functions and roles of tour agency are reducing with slow speed. So this study can suggest the alternative as new tour product to tour agency. In other words, the tour agency is not to sell tour product cheaply but only to suggest the tour product composing of education process as lifelong education. 본 연구는 ‘일본배낭여행’이라는 사이버 강의 수강자들의 자기주도성이 자아태도에 미치는 영향을 분석하였다. 사이버교육 수강자를 대상으로 Guglielmino가 개발한 자기주도적 학습 준비도(SDLRS)와 자아태도 측정요인을 활용으로 요인분석과 신뢰도 분석을 하였으며, SPSS 18.0을 이용하여 분석을 실시하였다. 연구 결과, 자아발견에 영향을 미치는 요인은 개방성, 수용성, 열정, 창의성, 자아존중감에 영향을 미치는 요인은 미래지향성, 문제해결능력, 독립성, 책임감, 자아통제감에 영향을 미치는 요인은 책임감, 열정, 독립성, 문제해결능력으로 나타났다. 연구 결과에서 볼 수 있듯이 사이버교육을 이론적 측면이 아니라, 여행이라는 체험활동을 접목시킴으로써 교육을 자아실현의 목적으로 보았으며, 사이버교육의 발전과 여행의 측면에서는 여행업의 발전방향을 제시코자 실시하였다.

[KBS 보도국 편집회의] ‘평기자 참여’의 오랜 전통, 그 가치를 높이려면

윤지연 (사)방송기자연합회 2020 방송기자 Vol.57 No.-