벽체의 뒷채움이 제한되어 있는 경우의 토압산정이론식

유범식,김훈제 안성산업대학교 1996 論文集 Vol.28 No.-

In case that the length of Backfill behind wall is confined, the active earth pressure acting wall will be reduced as compare with that calculated by conventional active earth pressure theories. Consequently, in this research , the theoritical formula of active earth pressure is proposed and conclusions are following. The angle of failure plane, 'α' of backfill soil is inclined to reduce as 'B/H' increase regardless of the angle of internal friction of backfill soil and earth pressure increase as the angle of internal friction reduce. The reduction effect of active earth pressure according to backfill length increase as 'B/H' more reduce than 'B/H=0.6'.

임팩트시 테니스 라켓 재질의 차이에 따른 근전도 분석

윤양진,유국종,서국웅,정미라,강영택,이훈식,서국은 釜山大學校 附設 體育科學硏究所 1999 體育科學硏究所 論文集 Vol.15 No.-

The purpose of this paper is to select 7 male athletes and female athletes of high school, and to compare their active potential differences of upper arm muscles according to characteristic of a racket. the results obtained are as follows: 1. According to the accumulative distribution rate of racket material, graphite and wood material show better efficiency in case of brachio radialis muscle of male athletes, but the racket material shows no constant efficiency in brachii radialis muscle of female athletes. In case of flexor carpi radialis muscle, wood material provides better efficiency only for male athletes. In case of triceps brachii muscle, wood material gives better efficiency to males athletes and steel material gives better efficiency to females athletes. Especially in case of biceps brachii muscle, neither male nor female athletes are influenced by racket materials at impact. 2. In the muscle load rate according to racket material, wood has the highest muscle active potential and graphite has the lowest active potential. Therefore, graphite is thoght to be better in the efficiency of muscle load rate.

근전도 시스템을 이용한 테니스 퍼스트와 세컨드 서비스의 생체역학적 연구-남ㆍ여 고교 테니스선수를 중심으로 : 남ㆍ여 고교 테니스선수를 중심으로

이중숙,강재형,유창재,양정옥,이훈식 가톨릭대학교 자연과학연구소 2001 自然科學論文集 Vol.9 No.-

This study selected each seven high-school tennis players of male and female and analyzed the M.RA according to the type of tennis service and the Muscle Active Potential of M.ES by using an electromyogram system. The results as follows; 1.The Muscle Active Potential of female tennis players is higher than that of male tennis players in M.RA according to Tennis Service Types. 2.The Muscle Active Potential of female tennis players is higher than that of male players in M.ES according to Tennis Serrice Types. 3.In male and female M.RA, the Muscle Active Potential of right and left showed the contrary results. 4.In male and female M.ES, the Muscle Active Potential is high in the second service in the case of male and in the first service in the case of female. 5.Female tennis player can improve efficiency in the aspect of biomechanics by strengthening the muscle of M.RA and M.ES. 6.The second service of male tennis player showed less efficient Muscle Active Potential than his first service because of excessive trunk muscle twist.

Experience Design of Future Vehicle as Contents Platform

Hoon Sik Yoo,Da Young Ju 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2

Z-force Touch Interaction Model and Haptic Feedback Time

( Hoon Sik Yoo ),( Da Young Ju ) 한국감성과학회 2015 추계학술대회 Vol.2015 No.-

A lot of studies have been made associated with Z-force touch technology providing an emotional touch experience owing to the development of technology related to pressure sensors. The study aims to provide a guide for the time of feedback to be provided at the time of force touch input to offer more emotional touch experience. For the research, the force touch model was defined by input elements (touch, release, hold, move, force-up and force-down) and feedback elements (haptic, visual, sound and thermal). An experiment was carried out after design the state of emotional touch experience based on the force touch model. In order to analyze the guide for the haptic feedback time, a user survey was carried out for various numbers after defining the minimum unit time to 10 milliseconds. The survey result showed that the input of force touch provided the most appropriate value of haptic feedback time. The study has proposed the haptic feedback guide based on the force touch model. It is possible to provide a more emotional experience of force touch compared when designing UX / UI using the guide. Future research should be made on the feedback components except for haptic, such as thermal.

Gesture Interaction Design based on User Preference for the Elastic Handheld Device

Hoon Sik Yoo,Da Young Ju 대한인간공학회 2016 大韓人間工學會誌 Vol.35 No.6

Objective: This study lays its aims at the definition of relevant operation method and function by researching on the value to be brought when applying smart device that can hand carry soft and flexible materials like jelly. Background: New technology and material play a role in bringing type transformation of interface and change of operation system. Recently, importance has been increased on the study of Organic User Interface (OUI) that conducts research on the value of new method of input and output adopting soft and flexible materials for various instruments. Method: For fulfillment of the study, 27 kinds of gestures have been defined that are usable in handheld device based on existing studies. Quantitative research of survey was conducted of adult male and female of 20s through 30s and an analysis was done on the function that can be linked to gestures with highest level of satisfaction. In order to analyze needs and hurdles of users for the defined gesture, a focus group interview was conducted aiming at the groups of early adopters and ordinary users. Results: As a result, it was found that users have much value regarding usability and fun for elastic device and analysis could be conducted on preferred gesture and its linkable functions. Conclusion: What is most significant with this study is that it sheds new light on the values of a device made of elastic material. Beyond finding and defining the gestures and functions that can be applied to a handheld elastic device, the present study identified the value elements of an elastic device - ‘usability and ‘fun’ -, which users can basically desire from using it. Application: The data that this study brought forth through preference and satisfaction test with the gestures and associated functions will help commercialize an elastic device in future.

유기적인 사용자 인터페이스를 위한 젤리 인터랙션 디자인

유훈식(Hoon-sik Yoo),주다영(Da-young Ju) 한국HCI학회 2016 한국HCI학회 학술대회 Vol.2016 No.1

최근 새로운 입력 방식과 출력 방식의 가치를 발굴하는 Organic User Interface(OUI)에 대한 다양한 연구가 수행되고 있다. OUI 를 효과적으로 적용하기 위해서 기기를 구성하는 재질은 매우 중요한 요소 중 하나이다. 이 연구는 젤리와 같이 부드럽고 탄력적인 소재를 손에 들고 다닐 수 있는 스마트 디바이스에 적용했을 때 활용가능한 조작 방식을 정의하고 이에 대한 정성적인 사용자 요구사항을 분석하는데 목적을 두고 있다. 기존의 연구들을 기반으로 elastic handheld device 로 활용 가능한 23 가지 제스처를 정의하였으며, 20 대, 30 대 그룹을 대상으로 포커스 그룹 인터뷰를 수행하였다. 인터뷰 수행을 통하여 elastic handheld device 의 사용자 경험과 관련하여 선호하는 입력 방식, 선호하지 않는 입력 방식, 사이즈, 강도, 재질 등과 관련한 이슈에 대한 의견들을 분석할 수 있었다. 이 연구는 새로운 재질을 통한 인터랙션이 가지는 사용자 경험의 가치를 발굴했다는 점에 가장 큰 의의를 둔다. Recently, various researches are being executed about Organic User Interface (OUI) to identify the values regarding new input and output methods. In order to effectively apply OUI, the material which composes the device is one of the highly important elements. This study has a research objective to define the applicable operation method when applying soft and elastic materials like jelly to hand-handled smart devices and analyze related qualitative user requirements. Based on existing researches, 23 gestures were defined which could be applied as elastic handheld devices and focus group interviews were conducted targeting 20’s and 30’s group. Through the interviews, opinions about various issues regarding preferred and not-preferred input methods which are related with elastic handheld device users’ experiences and related issues with size, strength and materials could be analyzed. This study has the biggest meaning to identify the user experience value of the interaction through new materials.

논문 : 스마트카의 인터페이스를 위한 경험 디자인 가이드라인

유훈식 ( Hoon Sik Yoo ),주다영 ( Da Young Ju ) 디자인융복합학회 2016 디자인융복합연구 Vol.15 No.1

통신 기술의 발달, 지능형교통체계(ITS: Intelligent Transport Systems)의 확산으로 자동차는 단순한 기계장치에서 종합편의 기능을 가진 제2의 생활 공간으로 변모하고 있으며, 이를 위한 인터페이스로써의 역할을 하는 플랫폼으로 진화하고 있다. 탑승자들에게 다양한 정보를 제공하는 인터페이스영역이 확장됨에 따라 스마트카 기반의 사용자 경험(UX: User Experience) 연구에 대한 중요성이 높아지고 있다. 이 연구는 스마트카의 사용자 경험 요소에 대한 가이드라인을 제안하는데 목적을 두고 있다. 연구의 수행을 위해 기존 연구를 기반으로 스마트카의 사용자 경험 요소를 기능(function), 상호작용(interaction), 표면(surface)으로 정의하였으며, UX/UI 전문가들의 논의를 통해 각 요소 별로 8개의 대표 기술, 14개의 대표 기능, 8개의 유리창의 위치를 정의하였다. 이 후 100명의 운전자를 대상으로 정의된 스마트카 사용자 경험 요소들에 대한 우선순위를 설문조사 방식으로 분석하였다. 분석을 통해 사용자들은 차량에 주요 기술을 적용함에 있어서 안전, 주행, 감성의 순으로, 조작 방식에 있어서는 음성인식, 터치, 제스처, 물리적 버튼, 아이트레킹의 순으로, 디스플레이 위치에 대해서는 운전석을 중심으로 전방에서 후방으로 높은 우선순위를 가지고 있는 것을 알 수 있었다. 성별에 따른 분석에 있어서는 2개의 기능 외에는 큰 차이를 보이지 않아 남성과 여성에 대한 가이드가 공통되게 적용될 수 있음을 알 수 있었다. Due to the development of communication technology and expansion of Intelligent Transport System (ITS), the car is changing from a simple mechanical device to second living space which has comprehensive convenience function and is evolved into the platformwhich is playing as an interface for this role. As the interface area to provide various information to the passenger is being expanded, the research importance about smart car based user experience is rising. This study has a research objective to propose the guidelines regarding the smart car user experience elements. In order to conduct this study, smart car user experience elements were defined as function, interaction, and surface and through the discussions of UX/UI experts, 8 representative techniques, 14 representative techniques, and 8 locations of the glass windows were specified for each element. Following, the smart car users’ priorities of the experience elements, which were defined through targeting 100 drivers, were analyzed in the form of questionnaire survey. The analysis showed that the users’ priorities in applying the main techniques were in the order of safety, distance, and sensibility. The priorities of the production method were in the order of voice recognition, touch, gesture, physical button, and eye tracking. Furthermore, regarding the glass window locations, users prioritized the front of the driver’s seat to the back. According to the demographic analysis on gender, there were no significant differences except for two functions. Therefore this showed that the guidelines of male and female can be commonly applied. Through user requirement analysis about individual elements, this study provides the guides about the requirement in each element to be applied to commercialized product with priority.

서비스 혁신을 위한 감각 중심의 디자인 접근법

유훈식 ( Hoon Sik Yoo ),반영환 ( Young Hwan Pan ),주다영 ( Da Young Ju ) 디자인융복합학회 2014 디자인융복합연구 Vol.13 No.6

디자인을 통한 서비스 혁신에 대한 기대감 또한 높아지면서 서비스 디자인을 통해 의료 서비스, 교육 서비스, 관광 서비스, 공공 서비스 등을 혁신한 사례들이 등장하고 있다. 디자인을 통한 서비스 혁신은 앞으로도 지속적으로 이루어질 것으로 보이며 이에 따라 서비스 혁신에 도움을 줄 수 있는 디자인 관점의 연구들 역시 지속적으로 이루어져야 할 것이다. 이 연구는 디자인을 통한 서비스 혁신을 위해서 감각이 가지고 있는 잠재적인 가치를 새롭게 조명하고 실제적인 디자인 연구 수행을 위한 방법론들을 제안하는데 그 목적을 두고 있다. 최근 고객의 감각을 자극할 수 있는 요소를 활용하여 서비스 경쟁력을 강화한 사례들이 나타나고 있기는 하지만 이와 관련된 개념이 정립되지 못하였고 실제적인 디자인 수행 방법 또한 구체화되지 못한 상황이다. 서비스 혁신을 위한 감각 중심의 디자인 접근법은 감각 중심으로 서비스를 혁신하는 새로운 관점에 대한 개념을 정립함과 동시에 이를 실제적으로 수행 가능하도록 하는 체계화된 방법론을 함께 제안한다. 연구에서 제안된 감각 경험 조사 방법론의 검증을 위해 사례 연구를 수행하였고 참가자들의 피드백을 받아서 실용화를 위해 개선사항을 도출하였다. As the expectation on the service innovation through design is increasing, cases which have innovated the service targeting the medical service, educational service, tourism service and public service through service design is emerging. This study has a purpose of proposing methodologies for conducting actual design studies by newly spotlighting the potential value have by the sense in order to innovate the service through design. Although there has been a recent appearance of cases which have strengthened the competitiveness of service utilizing the elements that can stimulate the senses of the customer, but the concept related to this was not established and also the actual design implementation method was not materialized. The sensors-centered design approach for service innovation establishes the concept on the new perspectives that innovate the service centered on senses and at the same time proposes a systematic methodology that enables the actual implementation. The sensors-centered design approach becomes materialized through investigation methodology on the sensual experience felt by the customer through the service and through the idea workshop methodology centered on senses that can derive the service concept centered on new senses.

감각 중심의 컨셉 도출을 위한 아이디어 워크숍 방법론

유훈식 ( Hoon Sik Yoo ),반영환 ( Young Hwan Pan ),주다영 ( Da Young Ju ) 한국감성과학회 2014 감성과학 Vol.17 No.4

산업의 중심이 제품에서 서비스로 이동하면서 보다 경쟁력을 갖춘 서비스를 제공하기 위한 기업들의 노력이 계속되고 있다. 경쟁력 강화를 위해서 고객의 감각을 자극할 수 있는 요소를 활용하여 서비스 경쟁력을 강화한 사례들이 나타나고 있다. 하지만 감각을 자극할 수 있는 서비스 컨셉 도출을 위한 디자인 관점의 방법론과 관련된 연구는 찾기 쉽지 않다. 이 연구는 디자인을 통한 서비스 혁신을 위해서 감각이 가지고 있는 잠재적인 가치를 새롭게 조명하고 감각 중심의 제품·서비스 컨셉 도출을 위한 워크숍 방법론을 제안하는데 그 목적을 두고 있다. 연구의 수행을 위해서 기존의 아이디어 워크숍과 감각 중심의 제품·서비스 혁신사례 및 감각의 가치와 관련된 문헌자료를 조사하였으며, 기존의 아이디어 워크숍 방법론에 감각의 관점을 정립한 방법론을 체계화 하였다. 정립한 방법론의 검증을 위해서 수행된 사례연구를 통해서 워크숍 방법론에서 수정 및 보완되어야 하는 요소들을 추출하였다. 연구의 결과 제안된 감각 중심의 아이디어 워크숍 방법론에 대한 유용성을 검증할 수 있었고, 개선방향에 대한 의견을 수렴하였다. 결론적으로 이 연구는 감각에 대한 새로운 관점의 접근법을 제안한 것에 가장 큰 의의를 둘 수 있으며 또한 이러한 접근을 위한 구체적인 아이디어 워크숍 방법론을 제안하고 검증한 것에 의의를 둘 수 있다. Corporations continue to make a lot of efforts to provide more competitive services as the focus of industry is migrating from products to services. This study aims to shed new light on the potential values of the sense for service innovation through design and propose the workshop methodology for deriving sense-based product and service concepts. To this end, this study investigated the literatures related to the product and service innovation cases based on the conventional idea workshop and sense and also the value of sense. Moreover, it systematized the methodology that established the perspective of sense to the conventional idea workshop methodology. To verify the established methodology, this study extracted the elements to be modified and supplemented from the workshop methodology through the previous case studies. As a result of the study, it was possible to verify the validity as to the sense-based idea workshop methodology and reflect the opinions as to the improvement direction. Consequently, this study is regarded meaningful for proposing the approach of a new perspective as to the sense. Also, this study is deemed meaningful for proposing and verifying the specific idea workshop methodology for the approach hereof.