• 한국운동역학회지
• /
• 제24권3호
• /
• pp.309-315
• /
• 2014

The aim of the present study was to investigate the effects of 6-week wrist resistance training on wrist torque control. Nineteen subjects were randomly assigned to either the wrist training group (n=9) or the control group (n=10). The training group performed wrist exercises for six directions (flexion, extension, pronation, supination, radial deviation, and ulnar deviation) while the control group did not. Testing for the isometric torque control error, one-repetition maximum (1-RM) strength, and isokinetic maximum torque (angular velocity of $60^{\circ}/s$ wrist movements) were conducted before and after six weeks of resistance training and after every two-week interval of training. The wrist training group showed significant decreases in isometric torque control error in all six directions after the 2-week resistance training, while the control group did not show significant increase or decrease. The training group showed significant increases in the maximum strength in all six directions assessed by 1-RM strength and isokinetic strength tests after the 4-week resistance training, while the control group did not show any statistically significant changes. This study shows that motor control ability significantly improves within the first two weeks of resistance training, while the wrist strength significantly improves within the first four weeks of resistance training in wrist training group compared to the control.

• 한국수학교육학회지시리즈E:수학교육논문집
• /
• 제23권3호
• /
• pp.563-581
• /
• 2009

본 연구에서는 중국과 한국의 산학서의 서문에서 산학과 산학교육의 중요성 및 필요성을 강조하기 위하여 사용된 표현들을 살펴본다. 이를 위해 첫째 육예지일(六藝之一), 둘째 복회(伏羲) 주공(周公) 공자(孔子) 공문(孔門), 셋째 도(道) 색 미오(微奧) 정미(精微), 넷째 경세지실용(經世之實用)을 중심으로 살펴본다. 여러 산학서에서 공통적으로 보이는 이러한 표현들을 통해 산학의 활성화를 위한 산학서 저자들의 노력을 되짚어 보고자 한다.

• 대한화학회지
• /
• 제14권1호
• /
• pp.119-122
• /
• 1970

In those six kinds of diamine salt crystal of which their structures had already been determined up to date, commonly one molecule of diamine and two molecules of acid were combined; although the crystal of benzidine perchlorate, only one molecule each of benzidine and perchloric acid were combined. At the case of benzidine perchlorate, one molecule acts as the role of two molecules by coincidence of the center of symmetry point of both the lattice and molecule, and perchlorate ion is locating symmetrically between two -$NH_2$ groups of different benzidine molecule, therefore benzidine and acid could be combined together with 1:1 by mole ratio. When forming the salt with diamine and acid, the combining mole ratio would be determined in accordance with the relationship between the symmetry element that presented by the space group and the symmetry element of diamine salt melecule.

• 한국콘텐츠학회논문지
• /
• 제14권8호
• /
• pp.74-83
• /
• 2014

본 연구는 해외 무용예술단체 SNS의 전반적이고 구체적인 분석을 위해 실시되었다. 전 세계 6대륙 100개국의 국 공립, 사설, 개인 무용예술단체 총 3,614개 중 SNS를 1개 이상 운영하는 627개의 단체를 연구대상으로 하였다. 해외 무용예술단체의 6대륙 지역별 분석을 무용장르별, 유형별로 분석 하였으며, 무용장르별 분석을 유형별로 분석 하였다. 또한, 6대륙 지역별, 무용장르별, 유형별로 분석 하여 다음과 같은 결론을 얻을 수 있었다. 첫째, 6대륙 지역에 따른 무용장르별 분석결과 북아메리카 대륙이 SNS를 사용하는 단체가 가장 많은 것으로 나타났다. 둘째, 유형에 따른 6대륙 지역별 분석결과 북아메리카 대륙이 트위터와 페이스북을 가장 많이 사용하는 것으로 나타났다. 셋째, 무용장르에 따른 유형별 분석결과 민속무용단체가 페이스북을 가장 많이 사용 하는 것으로 나타났다. 넷째, 유형에 따른 6대륙 지역별, 무용장르별 분석결과 페이스북, 트위터, 유투브 모두 발레단체가 가장 많이 사용하는 것으로 나타났다. 본 연구 결과를 토대로 SNS 디지털 마케팅에 대한 인식제고, 해외 무용예술단체의 SNS 정보제공, 지식정보체계 구축의 준거로 활용하고자 한다.

• Journal of Electrical Engineering and Technology
• /
• 제13권1호
• /
• pp.485-492
• /
• 2018

In this paper, we propose facial expression recognition using CNN (Convolutional Neural Network), one of the deep learning technologies. The proposed structure has general classification performance for any environment or subject. For this purpose, we collect a variety of databases and organize the database into six expression classes such as 'expressionless', 'happy', 'sad', 'angry', 'surprised' and 'disgusted'. Pre-processing and data augmentation techniques are applied to improve training efficiency and classification performance. In the existing CNN structure, the optimal structure that best expresses the features of six facial expressions is found by adjusting the number of feature maps of the convolutional layer and the number of nodes of fully-connected layer. The experimental results show good classification performance compared to the state-of-the-arts in experiments of the cross validation and the cross database. Also, compared to other conventional models, it is confirmed that the proposed structure is superior in classification performance with less execution time.

• 한국산학기술학회논문지
• /
• 제18권10호
• /
• pp.163-169
• /
• 2017

본 연구는 지역아동센터에서 운영하는 예체능교육의 현황을 살펴보고 만족도를 조사하여 향후 예체능교육이 보다 내실화되는데 필요한 기초자료를 제시하고자 한다. 연구대상은 경기도의 17개 지역아동센터이며, 2014년부터 2016년까지 운영된 예체능교육 현황을 조사하였다. 아울러 예체능교육을 받은 아동 419명에게 만족도 조사를 하였다. 연구결과는 다음과 같다. 2014년부터 2016년까지 예체능교육 현황을 살펴보면, 3년동안 예체능교육을 전혀 운영하지 않은 지역아동센터는 17개 기관 중 3개 기관이고, 3년 동안 지속적으로 예체능교육을 실시한 지역아동센터는 17개 기관 중 6개 기관이다. 2년동안 예체능교육을 실시한 기관은 17개 기관 중 2개 기관이였으며, 3년동안 한해라도 예체능교육을 지속한 기관은 17개 기관 중 6개 기관이였다. 예체능교육 진행교사의 전공 일치도를 살펴보면, 17개 기관의 미술, 음악교육은 모두 교양과정으로 자격을 이수한 비전공 경력자였다. 그러나 체육교육에서는 체육을 전공한 대학생들이 교육을 실시하였다. 예체능교육에 대한 서비스만족도를 살펴본 결과 예체능교육은 아동의 전반적인 생활에 많은 도움이 되었으며, 성별로 보면 여학생에 비해 남학생이 예체능교육에 대한 도움이 컸다고 했다. 예체능교육에 대한 만족도는 교육 참여학생 대부분 만족도가 높았으며, 특히 남학생의 만족도가 여학생보다 높았다. 추후 예체능교육에 대한 재참여 희망도를 살펴본 결과, 응답학생 대부분 참석하겠다라는 응답을 하였으며 여학생보다 남학생의 경우 재참여 희망도가 더 높았다. 본 연구를 바탕으로 몇 가지 제안을 하고자 한다. 지역아동센터 이용 아동의 창의력 향상과 인성교육을 함양하기 위해 질 높은 예체능교육은 더 많이 필요 하다고 하겠다. 친구들과의 원활한 의사소통을 배우는데 예체능교육이 활용될수 있다. 또한 아동들의 신체적 건강성과 정서적 안정감을 주는 창의적인 예체능교육이 되기 위해서는 목적에 맞는 목표를 설정하여 교육을 보완하는 것이 필요하다고 사료된다.

• 패션비즈니스
• /
• 제15권6호
• /
• pp.71-84
• /
• 2011

This study is purposed to categorize external image types of Korean male idol stars, and to understand characteristics of fashion and beauty design for each type and through such, the study is meant to identify the various types of male image and to provide data of image making. As part of the empirical study, it selected well-known 15 groups of male idol stars who were active during February of 2008 and August of 2010, categorized the image types by their photographic data, and analyzed characteristics of fashion and beauty design for each type. In order to measure the degree of image types, a survey was also conducted. The image types of male idol stars, which were classified through a workshop by a group of image-related experts, were categorized with 6 types that are Elite, Urban Chic, Charisma, Rebellious child, Toy boy, and Homme Fatale. The six types of male idol stars have a great relation with the modern male trends and images, and that the male idol stars have been leading the trends and presenting the image by the public preference. In addition, as shown the above, the recent male image appears as a mixed image of femininity and masculinity, showing a complex aspect that does not dominates with one image, and that it was found out to constantly be changing in the flow of times.

• 한국산업보건학회지
• /
• 제25권4호
• /
• pp.446-464
• /
• 2015

Objectives: This study was conducted to evaluate the task-specific hazards of chemicals used by nail technicians in Daegu Metropolitan City. Materials: A total of 30 nail shops located in Daegu City were surveyed to investigate the major tasks and practices performed by nail technicians and the ingredients listed in nail care products used in shops. We also collected instructions for use and material safety data sheets(MSDSs) of nail care products and compared CAS Nos. of ingredients with the lists of chemicals regulated by the Industrial Safety and Health Act(ISHA) and Chemical Substances Control Act(CSCA). Results: A total of 125 chemical ingredients were found in 468 nail care products used at the 30 nail shops. The most frequently found ingredients were ethyl acetate(72%), followed by n-butyl acetate(71.8%), isopropanol(56%), benzophenone(51.1%), nitrocellulose(46.4%) and ethanol(45.3%). Comparing six tasks, the task of manicuring used the most products at 222 products containing 91 ingredients. Among the 125 ingredients, there are 31 chemicals with occupational exposure limits(OEL) designated by the Ministry of Employment and Labor(MoEL), eight categorized as carcinogens, one mutagen and two reproductive toxic chemicals. In terms of carcinogens, formaldehyde was identified as the only confirmed human carcinogen(1A). We found that there was one chemical with a permissible limit, one special management substance, 18 workplace monitoring substances and ten special health diagnosis substances regulated by ISHA. For CSCA, nine poisonous substances, six substances requiring preparation for accidents and one restricted substance were identified. Conclusions: Based on these findings, formaldehyde was identified as one of the chemicals that should most strictly be controlled for the protection of the health of nail technicians and customers. At the same time, it is necessary to distribute materials with detailed hazardous information of nail care products for nail shop technicians.

• Animal cells and systems
• /
• 제4권3호
• /
• pp.223-229
• /
• 2000

Limbs and supporting structures of an organism experience a full weight of its own when it lands from water, because neutral buoyancy in the aquatic habitat will be no longer available in the terrestrial world. Metamorphosis of anuran amphibians presents 8 good research model to examine how this transition from non-loading to weight-loading affects development of motor capacity at the time of their first emergence on land. Our video analysis of the transitional anurans, Rana catesbeiana, at Gosner stage 46 (the stage of complete transformation) demonstrated that the take-off speed increased 1.23-fold after the first six hours of weight-loading on the wet ground. It did not increase further during the following three days of loading, and was close to the level of mature frogs with different body mass. During development of larvae in deep water with no chance of landing through metamorphosis, both tension and power of a hindlimb anti-gravity muscle increased 5-fold between stages 37 and n. However, the muscle contractility increased more rapidly when the larvas could access the wet ground by their natural landing behavior after stages 41-42. Muscle power, one of major factors affecting locomotory speed, was 1.29-fold greater in the loaded than in the non-loaded larvae at the transitional stage. Thus, weight-loading had a potentially significant effect on the elevation of motor capacity, with a similar extent of increment in locomotory speed and muscle power during the last stages of metamorphosis. Such a motor adjustment of the froglets in a relatively short transitional period would be important for effective ecological interactions and survival in their inexperienced terrestrial life.

• Journal of Korean Neurosurgical Society
• /
• 제64권5호
• /
• pp.732-739
• /
• 2021

Objective : Early successful reperfusion is associated with favorable outcomes in acute ischemic stroke (AIS). The purpose of this study was to achieve successful recanalization by a combined mechanical thrombectomy technique, the Aspiration-Retriever Technique for Stroke (ARTS), which is composed of a flexible large lumen distal access catheter and a retrievable stent as the first-line strategy of mechanical thrombectomy. Methods : We retrospectively reviewed 62 patients with AIS who underwent mechanical thrombectomy from 2018 to 2019 at our institute by a senior neurointerventionalist. Among them, patients who were treated using the ARTS technique with the soft torqueable catheter optimized for intracranial access (SOFIA^®; MicroVention-Terumo, Tustin, CA, USA) as the first-line treatment were included. Patients who had tandem occlusions or underlying intracranial artery stenosis were excluded. The angiographic and clinical outcomes were evaluated. The angiographic outcome was analyzed by the rate of successful recanalization, defined as a Thrombolysis in Cerebral Infarction score of 2b or 3 at the end of all procedures and the rate of successfully achieving the first pass effect (FPE), defined as complete recanalization with a single pass of the device. The clinical outcomes included the National Institutes of Health Stroke Scale (NIHSS) score, modified Rankin Scale (mRS), and mortality. Results : A total of 27 patients (mean age, 59.3 years) fulfilled the inclusion criteria. The successful recanalization rate was 96% (n=26) while the FPE rate was 41% (n=11). The mean post-procedural NIHSS change was -3.0. Thirteen patients (48%) showed good clinical outcomes after thrombectomy with the ARTS technique (mRS at 90 days ≤2). Postoperative complications occurred in seven of 25 patients : hemorrhagic transformation in six patients (22%) and distal embolization in one patient (4%). Mortality was 15% (n=4). Conclusion : Although the clinical outcomes using the ARTS technique with a flexible large lumen distal access catheter performed as the frontline thrombectomy in patients with AIS were not significantly superior than those of other studies, this study showed a high rate of successful endovascular recanalization which was comparable to that of other studies. Therefore, ARTS using the SOFIA^® catheter can be considered as the first choice of treatment for AIS due to large vessel occlusion.