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      • KCI등재

        폐쇄기술 스포츠의 인지불안과 수행력의 관계 : 메타분석

        강경두,정혜연,하은주,한덕현 한국정신신체의학회 2017 정신신체의학 Vol.25 No.1

        Objectives:The aim of this meta-analysis study was to examine the relationship between cognitive anxiety and performance in closed loop skill sports. Methods:A comprehensive literature search was conducted using databases including Korean Information Service System, DBpia, Research Information Sharing Service, and National Assembly Library from 1980 to 2015. Search terms included ‘Golf’, ‘Shooting’, ‘Archery’, ‘Anxiety’, and ‘Performance’. Standardized mean difference and 95% CI(confidence intervals) were calculated, and the heterogeneity of the studies was estimated using Q statistic. Results:Ten studies have satisfied the inclusion criteria. The main findings indicate that cognitive anxiety was significantly reverse correlated with performance in closed loop skill sports(r=-.198). The mean effect size for men(r=-.31) was significantly greater than that for women(r=-.05). Conclusions:Our results suggest that cognitive anxiety in closed loop skill sports is correlated with performance of athletes. Future study related to psychological aspects on athletes in sports is required in order to understand the specific evidence of relationship between anxiety and performance. 연구목적본 연구는 그 동안 국내에서 진행된 폐쇄 기술 스포츠 종목의 인지불안과 경기 수행력의 관계를 종합적으로분석하는데 목적을 두었다. 방 법본 연구에서 분석된 선정 연구는 1980년부터 2015년까지 국내에서 발표된 학술지 논문과 학위논문으로 설정하였다. 자료 수집을 위해 학술연구정보서비스(RISS), 한국학술정보(KISS), 국회도서관(NAL) 등을 이용하였으며, 검색을 위한 주요 사용 단어는 ‘골프’, ‘양궁’, ‘사격’, ‘불안’, ‘수행력’ 그리고 ‘경기력’ 이었다. 결 과최종 선정된 연구는 총 10편이었다. 폐쇄 스포츠 종목 선수들의 인지불안은 수행력의 부정적 영향을 미치는것으로 나타났다(ESr=-.198). 성별에 따른 메타분석 결과, 남자선수(r=-.31)가 여자선수(r=-.05)에 비해 더 많은 인지불안을 가지고 있는 것으로 나타났다. 결 론본 연구는 폐쇄스포츠 종목 선수들의 인지불안과 수행력의 관계가 있다는 것을 시사하고 있다. 스포츠 선수의 심리적 측면과 관련된 향후 연구에서는 불안과 수행력의 관계에 대한 심층적인 결과를 제시해야 할 필요성이 있다.

      • KCI등재

        ADHD 아동의 운동효과에 대한 메타분석 : 국내연구 중심으로

        강경두,현기정,박정하,한덕현 대한신경정신의학회 2015 신경정신의학 Vol.54 No.4

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

        The aim of this meta-analysis study was to examine the effectiveness of exercise interventions on attention-deficit hyperactivity disorder (ADHD) pertaining to cognitive function such as attention and impulsivity in children.ZA comprehensive literature search was conducted using databases including Korean Information Service System, DBpia, Research Information Sharing Service, and National Assembly Library from 1995 to 2014. Search terms included ‘ADHD’, ‘children’, ‘exercise’, ‘physical activity’, and ‘sports’. Standardized mean difference and 95% confidence intervals were calculated, and the heterogeneity of the studies was estimated using Q statistic. That is, these results revealed that effectiveness of exercise groups was higher by approximately 32% compared with control groups.ZEight studies (n=150) satisfied the inclusion criteria. The meta-analysis suggested that exercise has a moderate to large effect on core symptoms involved in attention [effect size (ES)=0.93] and impulsivity (ES=0.92) in children with ADHD. The main findings indicate that exercise, based on several types of exercise intervention, appears to be effective for mitigating symptoms such as attention, impulsivity in children with ADHD. From this perspective, exercise might be an effective adjunctive therapy for enhancing the effects of medication in children with ADHD. Future study related to exercise effect on ADHD symptoms is required in order to understand the specific evidence of relationship between exercise and core symptoms.

      • KCI등재

        가공송전선 유도장해 특성을 고려한 최적 상배열 연구

        강경두,김진규 대한전기학회 2019 전기학회논문지 Vol.68 No.1

        The domestic overhead transmission lines use a vertical configuration and reverse phase arrangement, but when there is a limitation in steel tower height because the transmission lines pass a height limit zone or special zone, an application of triangular arrangement is necessary, and a study on the optimal phase arrangement to minimize inductive interference for this is necessary. If conductor arrangement are changed, the action of electrostatic induction and electromagnetic induction becomes different from before changes, so the changed conductor arrangement should be reviewed in terms of inductive interference. So this paper presents an optimal phase arrangement to reduce inductive interference by calculating electrostatic induction and electromagnetic induction according to conductor arrangement.

      • HF 전처리시 SDB의 초기접합에 관한 연구

        정귀상,강경두 東西大學校 1999 동서논문집 Vol.5 No.-

        Si direct bonding(SDB) technology is very attractive for both Si-on-insulator(SOI) electric devices and MEMS applications because of its stress free structure and stability. This paper presents on pre-bonding according to HF pre-treatment conditions in Si wafer direct bonding. The characteristics of bonded sample were measured under different bonding conditions of HF concentration, applied pressure and annealing temperature(200∼1000℃ ) after pre-bonding. The bonding strength was evaluated by tensile strength method. The bonded interface and the void were analysed by using SEM and IR camera, respectively Components existed in the interlayer were analyzed by using FT-IR. The bond strength depends on the HF pre-treatment condition before pre-bonding (Min : 2.4kgf/㎠∼Max : 14.7kgf/㎠)

      • KCI등재

        유산소 운동이 소아 및 청소년의 인지기능에 미치는 영향 : 문헌고찰

        강경두(Kyoung Doo Kang),조정환(Jung Hwan Cho),한덕현(Doug Hyun Han) 대한소아청소년정신의학회 2015 소아청소년정신의학 Vol.26 No.3

        The purpose of this review was to investigate the relationship between aerobic exercise and cognitive function as well as synthesize the effect of aerobic exercise intervention studies centered on psychiatric symptoms associated with general cognitive deficit. Prospective studies on aerobic exercise and improvement of cognitive function were reviewed and synthesized. In addition, this literature review provides significant positive results on the relationship between aerobic exercise and general cognitive deficit associated with psychiatric symptoms. Review of this literature suggests that there is a positive relationship between participation in aerobic exercise and cognitive function. In this text, there are at least three general pathways by which aerobic exercise may facilitate executive function in children : 1) cognitive demands inherent in engaging in physical activity, 2) cognitive demands inherent in cooperation of complex motor tasks, and 3) physiological changes resulting from aerobic exercise. Another main finding of this review is that physical activity has a stronger influence on cognitive deficit, including attention-deficit hyperactivity disorder, depression, and anxiety. Development of cognitive function is the most important factor for children and youth. Therefore, future research should prove relationship between physical activity and cognitive function using a more scientific and quantitative approach design.

      • 담배연기에 노출된 흰쥐 피부 조직 변화에 미치는 견운모의 효과

        김지훈,강경두,이경석,양현궁,김완종 순천향대학교 기초과학연구소 2016 순천향자연과학연구 논문집 Vol.22 No.2

        This study conducted to examine the effect of sericite on the change of skin structure induced by indirect smoking in rat. Sericite is a fine grained mica, similar to muscovite, illite, or paragonite and a common alteration mineral orthoclase or plagioclase feldspars in areas that have been subjected to hydrothermal alteration typically associated with copper, tin, or other hydrothermal ore deposits. This mineral has been used as a composition of eco-friendly products including cosmetics or wallpaper. Male Sprague-Dawley rats were randomly divided into three groups: a normal control group (NC), sericite-applied and smoked group (E), and group (EC) only smoked three times per day for 7 days. Rat skin tissues were prepared for routine light microscopy. As results, hair follicles were more decreased in EC group than in E group. Cornified layer of epidermis was relatively thickened in EC group. Vacuolization, decreased glandular acini, immaturity in sebaceous glands were often observed in EC group. By Masson’s trichrome stain for identification of connective tissue, muscle and collagen, various structures and components were decreased in EC group in comparison with E group. Shortly, alteration of skin structures induced with indirect smoking might reduce through effective adsorption of pernicious ingredient by sericite products.

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