페로브스카이트 할로겐화물 박막의 발광 측정 조건에 따른 특성 분석

조현아,이승민,노준홍,Cho, Hyeonah,Lee, Seungmin,Noh, Jun Hong 한국재료학회 2022 한국재료학회지 Vol.32 No.10

Halide perovskite solar cells (PSCs) have improved rapidly over the past few years, and research on the optoelectrical properties of halide perovskite thin films has grown as well. Among the characterization techniques, photoluminescence (PL), a method of collecting emitted photons to evaluate the properties of materials, is widely applied to evaluate improvements in the performance of PSCs. However, since only photons emitted from the film in the escape cone are included, the photons collected in PL are a small fraction of the total photons emitted from the film. Unlike PSCs power conversion efficiency, PL measuring methods have not been standardized, and have been evaluated in a variety of ways. Thus, an in-depth study is needed of the methods used to evaluate materials using PL spectra. In this study, we examined the PL spectra of the perovskite light harvesting layer with different measurement protocols and analyzed the features. As the incident angle changed, different spectra were observed, indicating that the PL emission spectrum can depend on the measuring method, not the material. We found the intensity and energy of the PL spectra changes were due to the path of the emitted photons. Also, we found that the PL of halide perovskite thin films generally contains limited information. To solve this problem, the emitted photons should be collected using an integrating sphere. The results of this study suggest that the emission spectrum of halide perovskite films should be carefully interpreted in accordance with PL measuring method, since PL data is mostly affected by the method.

Effects of different stocking density and various phytogenic feed additives dosage levels on growing-finishing pigs

조현아,송민호,Ji Hwan Lee,오한진,Yong Ju Kim,Jae Woo An,Se Yeon Chang,Young Bin Go,송동철,조승열,Dong Jun Kim,Mi Suk Kim,Hae Ryoung Park,김현범,Jin Ho Cho 한국축산학회 2023 한국축산학회지 Vol.65 No.3

This study was to investigate the effects of different phytogenic feed additives (PFA) dosage levels in growing- finishing pigs stressed by high stocking density. A total of 72 mix sexed 12 weeks growing pigs ([Landrace × Yorkshire] × Duroc) with initial body weight (BW) of 49.28 ± 4.58 kg were used for 8 weeks. There were 3 replicate pens in each treatment group, with 3 pigs per pen. The dietary treatment groups consisted of basal diets in animal welfare density (negative control [NC]), basal diet in high stocking density (positive control [PC]), PC + 0.04% essential oil (ES1), PC + 0.08% essential oil (ES2), PC + 0.10% bitter citrus extract & essential oil (CES1), PC + 0.20% bitter citrus extract & essential oil (CES2), PC + 0.05% grape pomace extract (GP1), PC + 0.10% grape pomace extract (GP2). The reduction of space allowance decreased (p < 0.05) average daily gain, feed efficiency, and digestibility of dry matter, crude protein, and gross energy. Also, the fecal score of PC groups increased (p < 0.05) compared with other groups. Basic behaviors (feed intake, standing, lying) were inactive (p < 0.05) and singularity behavior (biting) was increased (p < 0.10) under high stocking density. There was no difference in blood profile. However, the supplementation of PFA alleviated the negative effects such as reduced growth performance, nutrient digestibility, and some increasing stress indicators in th blood (cortisol) and animal behavior (biting). In conclusion, the negative effect of high stocking density was most effectively mitigated by the normal dosage of the mixture of bitter citrus extract and essential oil additive (CES1).

Characterization and Production of Low Molecular Weight of Biopolymer by Weisella sp. strain YSK01 Isolated from Traditional Fermented Foods

조현아,김남철,유선균,Cho, Hyun Ah,Kim, Nam Chul,Yoo, Sun Kyun The Korean Society of Applied Science and Technolo 2022 한국응용과학기술학회지 Vol.39 No.5

Although probiotics have been shown to improve health when consumed, recent studies have reported that they can cause unwanted side effects due to bacterial-human interactions. Therefore, the importance of prebiotics that can form beneficial microbiome in the gut has been emphasized. This study isolated and identified bacteria capable of producing biopoymer as a candidate prebiotic from traditional fermented foods. The isolated and identified strain was named WCYSK01 (Wissella sp. strain YSK01). The composition of the medium for culturing this strain was prepared by dissolving 3 g K₂HPO₄, 0.2 g MgSO₄, 0.05 g CaCl₂, 0.1 g NaCl in 1 L of distilled water. The LMBP(low molecular weight biopoymers) produced when fermentation was performed with sucrose and maltose as substrates were mainly consisted of DP3 (degree of polymer; isomaltotriose), DP4 (isomaltotetraose), DP5 (isomaltopentaose), and DP6 (isomaltoheptaose). The optimization of LMBP (low molecular weight of biopolymer) production was performed using the response surface methodology. The fermentation process temperature range of 18 to 32℃, the fermentation medium pH in the range of 5.1 to 7.9. The yield of LMBP production by the strain was found to be significantly affected by q fermentation temperature and pH. The optimal fermentation conditions were found at the normal point, and the production yield was more than 75% at pH 7.5 and temperature of 23℃.

데이터 출처 유형에 따른 중학생의 소집단 논변활동의 인식론적 수준

조현아 ( Hyun A Cho ),장지은 ( Ji Eun Chang ),김희백 ( Heui Baik Kim ) 한국과학교육학회 2013 한국과학교육학회지 Vol.33 No.2

본 연구는 탐구 맥락에서 실시된 논변활동 과정에서 학생들이 이용하는 데이터 출처에 따라 학생의 인식론적 추론과 논변의 구조가 어떻게 달라지는지 알아보기 위해 수행되었다. 이를 위해 중학교 1학년 ``식물의 영양`` 단원에서 1차 데이터를 이용하는 3가지 논변 과제와 2차 데이터를 이용하는 3가지 논변 과제를 개발하여 적용하였다. 연구 결과, 논변활동 과정에서 나타난 학생들의 인식론적 추론은 데이터 출처에 따라 다르게 나타났다. 1차 데이터를 이용한 논변활동에서는 대부분 현상기반추론이나 관계기반추론을 통해 설명을 구성하였지만 2차 데이터를 이용한 논변활동에서는 모든 소집단이 모형기반추론을 포함하여 설명을 구성해 나갔다. 현상기반추론이나 관계기반추론을 바탕으로 작성된 논변의 경우, 학생들은 관찰 가능한 특징만을 기술하였고 논변에서 보장이 생략되는 경우가 많았다. 반면 모형기반추론을 포함한 논변의 경우 관찰 결과를 이론 지식과 결합하여 설명을 구성해가고 논변에서 보장이 보다 잘 드러났다. 그리고 이 때, 소집단 내에서는 더욱 다양한 아이디어가 제안되었고 이에 대한 평가 맥락이 형성되면서 논변활동을 더욱 자극하였다 This study is conducted to examine how epistemic reasoning and argument structures of students vary according to data sources used in the process of argumentation implemented in the context of inquiry. To this end, three argument tasks using first-hand data and three argument tasks using second-hand data were developed and applied to the unit on ``Nutrition of plants`` for first year middle school students. According to the results of this study, epistemic reasoning of students manifested during the process of argumentation and varied according to data sources. While most students composed explanations with phenomenon-based or relation-based reasoning in argumentation using first-hand data, all the small groups composed explanations that included model-based reasoning in argumentation using second-hand data. In the case of arguments including phenomenon-based or relation-based reasoning, students described only observable characteristics, with warrants omitted from arguments in many cases. On the other hand, in the case of arguments that included model-based reasoning, explanations were composed by combining the results of observations with theoretical knowledge, with warrants more apparent in their arguments.

호흡 마음챙김 명상을 활용한 금연프로그램의 효과

조현아(Hyeon-Ah Cho) 한국보건교육건강증진학회 2021 보건교육건강증진학회지 Vol.38 No.3

생명의료윤리학에서 ‘미끄러운 경사길 논변’에 관한 메타윤리학적 고찰

조현아(CHO Hyeon-A) 한국생명윤리학회 2003 생명윤리 Vol.4 No.1

‘Slippery Slope Arguments’ are arguments from consequences, which arise in biomedical ethical issues so frequently. It is characteristic of all slippery slope arguments that a dangerous outcome of some contemplated course of action is warned of. But the slippery slope arguments is more than just a warning. The dangerous outcome is put forward as a reason for not taking a first step in the contemplated course of action, on the grounds of the consequences that may follow. Despite the major role slippery slope arguments have always played in prudential, moral, political and legal argumentations, they have a bad philosophical reputations. Some texts even refer to them as ‘slippery slope fallacies’, or ‘the slippery slope fallacy’. Slippery slope arguments are open to criticism for logical unclarity and heap of argumentations. After characterizing ‘slippery slope arguments’ and analyzing the pattern of that arguments, I then explore its implications. We can devide slippery slope arguments into two versions of logical and empirical(psychological). Logical versions of slippery slope arguments have the burden of proof which is hard to clear out. I conclude that when we use slippery slope arguments to appose to allow A, we ought to be very sincere so as not to be vulnerable to ‘fallacy of heap’ or ‘fallacy of generalizations’. A slippery slope arguments that is not in accord with the goals of dialogue is an incorrect or faulty slippery slope arguments. But it is not necessarily a fallacious slippery slope arguments. We have to deal with slippery slope arguments in the context of dialogue about practical issues. If we focus on purely logical contexts in understanding and using slippery slope arguments, that is incorrect approach.

초등 5·6학년군 보건교과 내용요소 적절성 연구

조현아 ( Cho Hyuna ),송정혜 ( Song Jeunghye ),김경란 ( Kim Gyoungran ),박세은 ( Park Seeun ),심상희 ( Sim Sanghee ),이경순 ( Lee Kyungsun ),이은숙 ( Lee Eunsook ),이정희 ( Lee Junghee ),이지은 ( Lee Jieun ),이지혜 ( Lee Jihye ),이혜 한국보건교육학회 2020 한국보건교육학회지 Vol.6 No.1

본 논문은 초등학교 5·6학년 보건교과 내용요소 적절성 연구로서, 교과서와 장학자료 분석을 통해 보건교과 영역별 내용요소를 추출하고, 추출한 내용요소가 초등학교 5·6학년 군 보건교과 내용요소로서 적절한지 학생, 학부모, 교사를 대상으로 설문조사하여 집단 간 이해차이를 분석하였다. 우선 초등학교 5·6학년군 보건교과 내용체계를 4개 영역, 20개 핵심개념, 64개 내용요소로 제안하였다. 4개 영역은 ‘건강의 이해와 질병’, ‘생활 속의 건강한 선택’, ‘안전과 응급처치’, ‘건강자원과 사회문화’이다. ‘건강의 이해와 질병’ 영역은 3개의 핵심개념과 8개의 내용요소, ‘생활 속의 건강한 선택’은 3개의 하위 영역, ‘약물·담배·술’, ‘성건강’, ‘정서·정신건강’과 13개의 핵심개념, 39개의 내용요소, ‘안전과 응급처치’는 2개의 핵심개념과 8개의 내용요소, ‘건강자원과 사회문화’는 2개의 핵심개념과 9개의 내용요소로 구성하였다. 본 연구에서 추출한 보건교과 내용요소에 대해 학생, 학부모, 교사집단 모두 초등학교 5·6학년 보건교과 내용요소로서 적절하다고 응답하였다. 각 내용요소별 평균값은 4.11~4.69의 분포를 보였다. 각 영역별 평균값은 ‘건강의 이해와 질병’이 4.22~4.55, ‘생활 속의 건강한 선택’이 4.11~4.62, ‘안전과 응급처치’가 4.40~4.69, ‘건강자원과 사회문화’가 4.22~4.46이었다. 각 영역별 집단 간 평균값의 차이를 보면, ‘건강의 이해와 질병’ 영역, ‘약물·담배·술’ 영역, ‘안전과 응급처치’ 영역은 교사 집단이, ‘성건강’ 영역은 교사와 학부모 집단이, ‘건강자원과 사회문화’ 영역은 학생 집단의 평균값이 대체로 높았고, ‘정서·정신건강’ 영역은 집단 간 유의미한 차이가 없었다. 2015개정교육과정이 전면 적용되는 현재, 교사의 교육과정 문해력과 교육과정 재구성 역량이 강조되나, 국가수준에서 제시된 초등학교 보건교과 교육과정이 없다는 것은 실제보건교육이 초등학교 현장에서 실시되고 있음에도 무엇을, 어떻게 되도록 가르쳐야 하는지에 대한 기준점이 없음을 의미한다. 비록 교사별 교육과정이 강조되고, 교사가 교육과정 전문가임에 틀림없으나, 국가수준의 교육과정이 제시되어야 교육과정 안에서 교사는 자신의 전문성을 발휘할 수 있을 것이다. 그러므로 초등학교 보건교과 교육과정의 마련이 시급하다. This paper is a study on the appropriateness of the content element of the health subject in the 5th and 6th grades of elementary school. This, through the analysis of textbooks and scholarship materials, extracted the content elements according to the health subject areas, and then surveyed the questionaire on the samples of students, parents, and teachers to see if the content element of the health subject in the 5th and 6th grades of elementary school is appropriate, finally analyzing the understanding difference of the groups. First of all, this divided the content element of the health subject in the 5th and 6th grades of elementary school into four areas, 20 key concepts, and 64 content elements for the convenience of analysis. The four areas are "Health Understanding and Disease," "Healthy Choice in Life," "Safety and First Aid" and "Health Resources and Social Culture." “Health Understanding and Disease" area has three key concepts and eight content elements. “Healthy Choice in Life" has three sub-area areas; "Drugs, Tobacco and Alcohol". "Health and Mental Health" and 13 key concepts; "Safety and First Aid" has two key concepts and eight key content elements; "Health Resources and Social Culture" has two key concepts and nine content elements. All the sample groups responded the health subject content elements extracted from this study to be appropriate as those for the 5th and 6th grades of elementary school. The average value of every content element was distributed at 4.11 to 4.69. The average values of every area are following: “Health Understanding and Disease”, 4.22-4.55; “Healthy Choices in Life”, 4.11-4.62; “Safety and First Aid”, 4.40-4.69; “Health Resources and Social Culture”, 4.22-4.46. Observing the differences in average values between groups of different areas, the average values of the areas of "Health Understanding and Disease," "Drugs, Tobacco and Alcohol," and "Safety and First Aid" are high in the group of teachers, those of the area of “Sexual Health” are high in the groups of teachers and parents, those of the areas of "Health Resources and Social Culture" are generally high in the group of students, and those of the area of "Sentimental and Mental Health" have no significant difference between groups. At present situation under the comprehensive application of 2015 revised curriculum, although teachers' literacy on curricula and ability to reconstruct curricula are emphasized, the fact that there is no curriculum for the health subject of elementary school suggested at the national level actually means that there is no criterion on what and how to teach it in spite of teaching the health education in the elementary school scene. It is sure that every teacher's curriculum should be emphasized and the teacher must be an expert in the curriculum, but, nevertheless, the national level curriculum have to be presented so that the teacher can display his or her expertise within the curriculum. Therefore, it is urgent to prepare a health subject curriculum for elementary school.

5일 금연 프로그램이 생리적 지표 및 심리적 요인에 미치는 영향

조현아(Hyun-A Cho),한상숙(Sang-Sook Han) 한국보건교육건강증진학회 2011 보건교육건강증진학회지 Vol.28 No.1

ROCF 그리기 접목 인지행동적 미술치료가 ADHD 아동의 ROCF 그리기 수행과 주요 증상 및 문제행동 변화에 미치는 효과

조현아(Hyunah Cho),전효정(Hyojeong Jeon) 인지발달중재학회 2020 인지발달중재학회지 Vol.11 No.1

연구목적: 본 연구의 목적은 ADHD 아동을 대상으로 인지행동적 미술치료 안에서 인지훈련적 접근으로서의 Rey-Osterrieth Complex Figure (ROCF) 그리기가 아동의 주도로 시도되었을 때 ROCF 그리기 수행과 주요 증상 및 문제행동이 긍정적으로 변화하는지 확인해 보는 데 있다. 연구방법: 연구대상은 7세와 8세의 남아 2명으로 K 초등학교 일반학급에 재학 중인 ADHD 진단을 받은 아동이다. 프로그램은 K 정신건강의학과 의원 내 심리치료실에서 개별 주 1회 40분씩 총 30회기로 시행하였다. 변화 측정을 위해 회기 별 ROCF 그리기의 수행 태도 기술과 평정점수를 산출하였고, 전체 회기의 과정을 회기 별로 기술하고, 프로그램 시행 사전과 사후에 ACRS와 K-CBCL를 측정하였다. 연구결과: 첫째, 연구 대상자의 ROCF 그리기 수행력이 30회기에 걸쳐 꾸준히 향상되었고, ROCF 그리기 수행에서도 긍정적이었다. 둘째, ROCF 그리기 접목 인지행동적 미술치료를 통해 나타난 연구 대상자의 주요 증상과 문제행동이 사전과 비교해 사후에 감소하였다. 결론: ROCF 그리기 활동이 인지행동적 미술치료 활동에 접목될 때 ADHD 아동의 ROCF 그리기 수행과 주요 증상 및 문제행동 변화에 긍정적일 수 있다. Objective: The purpose of this study was to positively demonstrate drawing performance and major symptoms and problem behavior of children with ADHD through Rey-Osterrieth Complex Figure (ROCF) drawing is a cognitive training approach used in cognitive-behavioral art therapy to determine change in performance ance in children with ADHD. Methods: The study included 2 boys, aged 7 and 8 years, who were diagnosed with ADHD during their K elementary school. The program was conducted in 30 sessions for 40 minutes per week in a psychotherapy room within the K Mental Health Clinic. The drawing performance and rating score of ROCF drawing for each session were measured and the process was described for each session Furthermore, Abbreviated Conners Rating Scale(ACRS) and Korean-Children and Adolescent Behavior Checklist(K-CBCL) were measured before and after the program was implemented. Results: First, the participants’ performance in ROCF drawing steadily improved after 30 sessions, and drawing performance was positive. Second, there was a decreased in the participants’ major symptoms and problem behaviors after cognitive-behavioral art therapy ROCF drawing. Conclusions: The ROCF drawing activities when applied to cognitive-behavioral art therapy, positive for the performance of ROCF drawing and major symptoms and problem behavior of children with ADHD.

명품 패션 브랜드의 미술관 전시에 대한 문화사회학적 시론 - 입생로랑, 조르지오 아르마니, 샤넬 전시 사례를 중심으로 -

조현아 ( Hyuna Cho ),오지현 ( Ji Hyun Oh ),최샛별 ( Setbyol Choi ) 국민대학교 사회과학연구소 2021 社會科學硏究 Vol.34 No.1

본 연구는 패션에 관한 사회학 연구 활성화를 위한 시론적 작업의 일환으로 문화사회학적 관점에서 패션을 고찰하고자, 패션이 가진 예술적 가치가 생산되는 방식과 거기에 활용되는 제도적 장치로서의 미술관(museum)에 주목하였다. 이를 위하여 일차적으로, ‘패션-미술관 관계’를 조망하는데 통찰력을 제공하는 문화사회학적 논의들을 ‘미술관의 제도화 역할’과 ‘예술 개념의 확장’ 중심으로 살펴보았다. 다음 단계로 경험적 차원에서 이에 관한 논의의 발전을 이끌어 온 입생로랑 회고전(1983), 아르마니 회고전(2000), 샤넬 회고전(2005) 등 세 건의 명품 패션 브랜드 미술관 전시에 대한 사례분석을 진행하였다. 명품 패션 브랜드들이 미술관에서의 전시를 성공적으로 개최하고, 이로써 자신들을 ‘예술’로 재규정 할 수 있었던 데에는 (1) 예술의 개념과 범위에 대해 격렬하게 진행되었던 사회적·학문적 차원에서의 논의들과 (2) 그를 통해 점차 모호해진 예술의 경계 (3) 시민/소비자로서 영향력을 키워 온 대중의 문화적 욕구 그리고 (4) 시대 흐름과 사회적 분위기, 경제적 상황으로 인해 전시 대상의 폭을 넓힐 수밖에 없었던, 그러나 그럼에도 혹은 그렇기에 더욱 공고하게 유지된 미술관의 제도화 기능이 중첩적으로 작용하였음을 제시하였다. This research aims to analyse fashion in the perspective of cultural sociology, as primary work of invigorating sociological studies on fashion. We examine the way that artistic values of fashion are produced and the role of museum in the process as an institutional apparatus. First, by focusing on ‘the role of art museums in institutionalisation’ and ‘the conceptual expansion of arts’, we review the discourses of cultural sociology that provide insights into the ‘relationship between fashion and museum.’ Then the extensive exhibitions and retrospectives of three luxury brands(Yves Saint Laurant, Giorgio Armani, and Chanel) which have led to the development of such discussions are analysed. We conclude that the following factors have contributed to the successful exhibitions of luxury brands at art museums, consequently redefining them as ‘arts.’ (1) Intense social and academic discussions regarding the concept and scope of arts, (2) increasingly blurred boundaries of arts, (3) cultural needs of the public with increasing influence as citizens/consumers, (4) the institutionalisation role of art museums that became more announced as a consequence of (regardless of) the time-stream, social atmosphere, and economic conditions that forced museums to expand their scopes of exhibitions.