Nanogenerators: Fully Rollable Transparent Nanogenerators Based on Graphene Electrodes (Adv. Mater. 19/2010)

Choi, Dukhyun,Choi, Min-Yeol,Choi, Won Mook,Shin, Hyeon-Jin,Park, Hyun-Kyu,Seo, Ju-Seok,Park, Jongbong,Yoon, Seon-Mi,Chae, Seung Jin,Lee, Young Hee,Kim, Sang-Woo,Choi, Jae-Young,Lee, Sang Yoon,Kim, Jo WILEY-VCH Verlag 2010 ADVANCED MATERIALS Vol.22 No.19

<B>Graphic Abstract</B> <P>The cover shows an image of fully rollable transparent nanogenerators synthesized using chemical vapor deposition grown large-scale graphene sheets as transparent electrodes and piezoelectric ZnO nanorod arrays. Sang-Woo Kim, Jae-Young Choi, and co-workers report on p. 2187 the electrical and structural stability of the nanogenerators, with excellent charge scavenging performance under external mechanical loads such as bending and rolling. This study shows that graphene-based nanogenerators are very promising for self-powered rollable transparent device applications. <img src='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content.gif' alt='wiley_img_2010/09359648-2010-22-19-ADMA201090066-content'> </P>

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

중·고등학생의 인터넷 중독수준에 따른 정신건강 및 학교적응의 차이

이기영 ; 최성열 ; 신성철 김천대학교 2006 김천대학교 논문집 Vol.27 No.-

Abstract This study is to find out the difference of mental health and school adaptation according to internet poisoning of junior and senior high school students, and the studyresults are as follows. First, it was found that the internet poisoning level of junior high school students is higher in all subordinate factors than that of senior high school. Second, regarding the difference of self among mental health according to inter-net poisoning level of junior and senior high school students, it was found that the higher the internet poisoning level, that is, the closer to internet poisoning stu-dents, the more problems were in emotion sell, learning self, coping self, body self. As to the difference among mental health, it was found the more the students used internet, the higher the degree of affect, neurosis, somaticization, acting, etc. Lastly, regarding the difference of social support among mental health, it was found that the lower the internet poisoning level, the more the students think that they receive more support from their families, friends and relatives. Third, in the difference of school adaptation according to internet poisoning level of junior and senior high school students, it was found that the higher the internet-poisoning level of students, the more difficult were they in adapting themselves to school life. Especially, the higher the internet poisoning level, the more difficult were they in all the subordinate factors of school adaptation. So, it was revealed that the more exposed to internet students, the more student failed in adapting to school where they stayed for the longest time, In conclusion, it was found that there was a difference in mental health and school adaptation according to internet poisoning level, and the closer to internet poisoning, the more difficulties they suffer in mental health and school adaptation. Therefore, it seems urgent to develop treatment or a prevention program for them.

반응중심 문학활동이 유아의 조망수용능력에 미치는 영향

이기영 ; 최성열 ; 신성철 김천대학교 2009 김천대학교 논문집 Vol.30 No.-

The purpose of this study was to identify the effect of response centered litera-ture activity on children's perspective taking, To demonstrate the effect of response centered literature activity, 65 children at the age 5 were subjected to this study, and they were to 2 groups and were each located to experiment group who were to go through 24 response centered literature activity and comparison group who were read 8 picture books. This study surveyed the children's per-spective taking, the pre-test, post-test to examine the effect of response cen-tered literature activity. The data collected from the pre-test and post-test. ANCOVA procedure was conducted to analyze the effects of the experimental activities compared to the comparison group. The test results demonstrated that children in the experiment group made significant improvement on perspective taking. In conclusion, these activities were designed to correspond to children's experience, interest and demands by using of picture books, it is highly expected to be able to used in the field as useful social and emotional education.

Coevaporation에 의한 cd₁-xZn_(x)S 박막 제작 및 특성에 관한 연구

李載亨,李虎烈,朴鏞冠,申成浩,申載爀,朴光子 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-

In this paper, structural optical and electrical properties of Cd_(1-x)Zn_(x)S thin films prepared by coevaporation method were studied. Also, effects of ZnS mole ratio(x) to CdS on properties of thin film Cd_(1-x)Zn_(x)S/CdTe solar cells were investigated. When the ZnS mole ratio was less than 0.85, the crystal structure of Cd_(1-x)Zn_(x)S films was hexagonal with the c axis aligned perpendicular to the substrate. For x>0.85, however, the Cd_(1-x)Zn_(x)S films were grown with cubic zincblende structire. As the ZnS mole ratio increased the lattice constant of Cd_(1-x)Zn_(x)S films rapidly increased with ZnS mole ratio. The open circuit voltage of Cd₁xZnxS/CdTe solar cells increased with x due to reducing of the electron affinity difference between Cd₁xZnxS and CdTe films. However, the increase of series resistance due to the high resistivity of Cd_(1-x)Zn_(x)S films results on reducing conversion efficiency.

PLCM을 이용한 카오스 블록 암호화 기법

이성우,이민구,박정렬,신재호 東國大學敎 産業技術硏究院 2005 산업기술논문집 Vol.15 No.1

본 논문에서는 동력학적 특성이 좋은 PLCM을 이용한 256비트 길이의 암호 키와 32비트 데이터 블록의 카오스 블록 암호화 기법을 제안한다. 본 논문에서 제안한 기법은 256비트의 키에서 각 암호화 단계마다 사용될 32비트의 세션 키 두 개를 생성해서 PLCM의 초기 값과 반복회수를 결정하는데 사용한다. 본 제안 기법은 피드백 구조와 대치 기능의 S함수를 통해 암호 강도를 향상시켰다. 또한 실험 결과와 안전성 분석을 통해 본 제안 기법이 통계적(Statistical) 공격에 매우 강함을 보여준다. In this paper, we propose a chaotic block encryption scheme using a PLCM (Piecewise Linear Chaotic Map) having a good dynamical property. The proposed scheme has a block size of 32 bits and a key size of 256 bits. In the proposed scheme we use two 32-bit session keys generated from 256-bit key to decide the initial value and the number of iteration of PLCM. To enhance the strength of security we use a feedback structure and a S (Substitution) function. With results of test and analyses of security we show the proposed scheme is very secure against statistical attacks.

洛東江 流域의 土壤 特色 및 土地 利用 實態 調査

이충열,김용철,박현철,김성만,최인수 密陽産業大學校 農業技術開發硏究所 1998 農業技術開發硏究所報 Vol.2 No.1

1980년에 발표한 자료와 그 후 토양조사를 한 결과를 종합하여 낙동강 유역의 토양을 중심으로 우리 나라의 토양특성을 비롯한 각종 토양해설 자료를 근거로 요약하면 다음과 같다. 우리 나라 지형은 매우 복잡하나 산악이 대부분을 차지하고 있으며, 태백산을 중심으로 동부는 급경사의 지형이 발달하여 있고, 서부는 완만한 경사를 이루는 산악지가 많을 뿐만 아니라 우리 나라의 곡창지대라 할 수 있는 평야지는 한강을 비롯하여 낙동강, 금강, 및 영산강 유역에 분포하고 있다. 산악지의 면적이 많아 농경지의 절반 이상이 경사지에 분포하고 있는 것이 특징이라 할 수 있다. 토양 모재는 산성암 조립질인 화강암 또는 화강편마암이 전국의 2/3 이상 점유하고 있으며 수성암인 혈암 및 사암은 낙동강 유역이 위치한 경상남북도에 많이 분포하고 있다. 석회암은 강원도에 가장 많이 분포하고 있고 경기 및 경북의 북부지방에 약간 분포하며 기타 지역에는 산재하여 분포하고 있다. 이외에도 반암, 안산암, 유문암 및 편암 등이 분포하고 있으며 충적층은 주로 낙동강 유역을 포함한 4대강 및 이들 4대강의 재류에 넓게 분포하고 있다. 정밀 토양조사 결과 면적은 9,577,000ha(논 879,000ha, 밭 1,288,000ha, 과수 및 뽕밭 119,000ha, 초지 103,000ha, 임지 6,425,000ha, 기타 763,000ha), 이 중 낙동강 유역은 논, 밭을 포함한 농경지 240,731ha, 임지 1,132,655ha 및 기타 154,945ha로서 총 면적은 대략 1,565,332ha이다. The summary of the survey, which was based on the published data since 1980, on soil characteristics and land utilization of Korea including the basin of the Nakdong river is as follows : The mountainous area comprises the various physiographic features. The eastern part from Taebaeg Mountain is mostly covered by the steep sloped land and the western part perches on gently sloped hil1y area in which the major productive area is distributed along the alluvial plains of the major river basins, Han river, Nakdong river, Kum river and Youngsan river in Korea. More than half of the cultivated lands occur on the local valleys and mountain foot slopes. Soils from coarse textured acidic crystalline rocks such as granite and granitic gneiss cover more than 2/3 of the country. Soils from sedimentary rocks like shale and sandstone are mainly confined Kyungbuk province, soils from limestone are mainly in Kangwon and partly in Kyungki, Kyungbuk and other provinces, and others are from porphyry, andesite, gabbro, rhyolite and schist. Alluvial soils are mainly developed on four river basins and their tributaries. The area of whole cultivated land covered by the detailed soil survey was turned out to be 9.577.000ha, upland 879.000ha, paddy land 1,288,000ha, orchard and mulberry 119.000ha, grass land 103,000ha, forest 6,425,000ha and the others 763,000ha, In Nakdong river valley, total area was approximately 1,565,332ha and the cultivated area including upland and paddy land was 240,731ha. The area of forest and the others were respectively 1,132,655ha and 154,945ha.

성견에서 수직적 골결손부에 골이식후 교정력 적용시기에 따른 치주조직의 반응

이상열,황현식,김경근 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

The aim of this study was to investigate the periodontal response according to the timing of orthodontic force application after bone graft into the angular bony defect. Nine dogs were divided into three groups, 2, 4, and 6 weeks, according to the timing of orthodontic force application after bone graft. Periodontal angular bony defects were created surgically at the distal aspect of both maxillary third incisors. Two weeks later, flap operation was performed to eliminate inflammation and reference notch was made on the root surface at the level of the bottom of each defect. Demineralized freeze-dried bone was implanted on the left side whereas only debridement was done on the other side. Experimental tooth movement was executed during 8 weeks on both graft and non-graft sides. After 2 weeks of retention period, animals were sacrificed for histologic specimens. The results were obtained as follows: 1. New bone formation was more pronounced in the graft side than in the non-graft side in all experimental animals. 2. In the 6-week group, new bone and cementum formation was observed in more than half from the notch to the cemento-enamel junction, and the zone of connective tissue attachment was found without apical migration of junctional epithelium. 3. In the 4-week group, the amount of new bone formation was smaller than in the 6-week group whereas the overall remodeling pattern was similar. 4. New bone formation was confined to around the notch and the junctional epithelium migrated apically to the level of the notch with no connective tissue attachment and cementum formation in the 2-week group. The results of the present study suggest that periodontal response may be influenced by the timing of orthodontic force application after bone graft into angular bony defect.

교사가 지각한 유치원 원장의 변혁적 리더십이 교사의 직무만족도, 직무 스트레스 및 직무효과성에 미치는 영향

이기영 ; 최성열 ; 신성철 김천대학교 2007 김천대학교 논문집 Vol.28 No.-

This study aims to find out the effect of the transformational leadership of the principal of a kindergarten recognized by a teacher on the job satisfaction, stress and effectiveness of a teacher, To do that, the author circulated questionnaires to kindergarten teachers of Daegue · Gyeongbuk, and the collected materials was analyzed by regression analys is using SPSS 120 program. As a analysis result, it was found that the transformational leadership of a kindergarten principal recog-nized by a kindergarten teacher had a positive effect on the job satisfaction and effectiveness of a teacher and a negative effect on job stress of a teacher. That is, the transformational leadership of a kindergarten principal was found to increase the job satisfaction and effectiveness of a teacher and to lower the job stress of a teacher and to lower the job stress of a teacher.

Swanson의 주의력결핍 장애척도의 한국판 표준화

이종범,박성찬,정성덕,김진성,서완석,배대석,주열 대한생물치료정신의학회 2002 생물치료정신의학 Vol.8 No.2

연구목적 : 한국판 Swanson의 주의력 결핍 장애 척도(이하 SNAP)의 신뢰도와 타당도를 검증하고, 이를 국내 실정에서 주의력결핍 과잉행동장애 환자를 선별할 수 있는 평가용 도구로서 적합한지 여부와 연구에 사용할 수 있는지를 알아보고자 하였다. 방 법 : 1998년 7월 1일부터 2001년 9월 30일까지 영남대학교 의료원 신경정신과 외래를 방문한 주의력결핍 과잉행동장애 환자 392명과 정상대조군 432명을 대상으로 SNAP을 시행하였다. 결 과 : 남녀 간의 SNAP 척도 점수비교에서, 환자군에서는 유의한 차이가 없었으나 정상 대조군에서는 남자가 유의하게 높게 나타났다(p<.01 ∼ .001). 검사-재검사 신뢰도 검증에서 신뢰도 계수는 각 하위 척도에서 .85에서 .92로 모두 만족할 만큼 높았다(p<.05). 내적일관성에 의한 신뢰도 검증에서 정상 및 환자군에서 각 하위척도별로 Cronbach α값이 .80(p.05)이상으로 나타났고, 반분신뢰도는 정상 및 환자군에서 각 하위척도별로 0.731에서 .866사이였다(p<.05). 주의결핍장애 평가 척도-가정관(Attention Deficit Disorder Evaluation Scale-Home Version) 및 소아기 집중력 문제 척도(Childhood Attentin Problem Scale)와의 준거 타당도는 ADHD 환자군에서 .342에서 .713사이였고(p<.05), 정상 대조군에서 .551에서 .789였다(p<.05). 요인분석을 해 본 결과 본 척도는 3개의 요인으로 분류되었는데, 부주의(inattention) 요인, 충동성/과잉행동(impulsivity/hyperactivity)요인, 또래 관계(peer interaction)요인으로 구분되었다. 본 척도가 정상인과 환자를 감별할 수 있는 척도인가를 알아보기 위한 감별 타당도 검사를 해본 결과 87.5%를 분류하여 높게 나타났다. 환자와 정상인을 구분하는 점수인 절단점은 표준편차 1.5를 절단점으로 잡을 때 이는 백분율로 93percentile에 해당하는 점수로서 각 소척도 점수에서 남자(0.98∼1.65)와 여자(0.64∼1.38)의 절단점이 다르게 나타났으며 남자가 높게 나타났다. 결 론 : 이상의 결과에서 볼 때 한국판 SNAP 평가 척도의 신뢰도와 타당도가 입증되었고 환자를 판별하는 능력이 우수하여 향후 ADHD 연구에 유용한 도구로 사료된다. Objectives : The purpose of this study was to examine reliability and validity of Swanson's attention deficit disorder sacale(SNAP). Method : SNAP was administered to 432 elementary school students and 392 patients who were diagnosed as attention deficit hyperactivity disorder in Yeungnam university hospital from 1998 July to 2001 September. Results : In the reliability test, the test-retest reliability coefficient was significantly high and that of inattention was 0.85, that of impulsivity was 0.90, that of hyperactivity was 0.90 and that of peer interaction was 0.92(p<.05). In the reliability test by internal consistency, the Cronbach α coefficient was above 0.80 at each subscale in both patients and normal control group(p<.05). The split-half reliability coefficient by first-second half method showed high correlation and those of each scales were from 0.731 to 0.866 in both patients and normal control group(p<.05). The criterion validity of SNAP with Attention Deficit Disorder Evaluation Scale-Home Version(ADDES-HA) and Childhood Attention Problem Scale(CAP) scale was from 0.342 to 0.713 in patients group, from 0.551 to 0.789 in normal control group(p<0.05). The discriminant ability between ADHD and normal subjects by SNAP was 87.5%. Conclusion : In this point of view, SNAP scale showed high reliability and validity in applying to Korean subjects and was proved to be useful screening tool for attention deficit hyperactivity disorder reserch.