• 한국멀티미디어학회논문지
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• 제15권1호
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• pp.40-50
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• 2012

Face recognition is a biometric technology used to identify individuals based on facial feature information. Previous studies of face recognition used features including the eye, mouth and nose; however, there have been few studies on the effects of using other facial components, such as the eyebrows and chin, on recognition performance. We measured the recognition accuracy affected by these facial components, and compared the differences between computer-based and human-based facial recognition methods. This research is novel in the following four ways compared to previous works. First, we measured the effect of components such as the eyebrows and chin. And the accuracy of computer-based face recognition was compared to human-based face recognition according to facial components. Second, for computer-based recognition, facial components were automatically detected using the Adaboost algorithm and active appearance model (AAM), and user authentication was achieved with the face recognition algorithm based on principal component analysis (PCA). Third, we experimentally proved that the number of facial features (when including eyebrows, eye, nose, mouth, and chin) had a greater impact on the accuracy of human-based face recognition, but consistent inclusion of some feature such as chin area had more influence on the accuracy of computer-based face recognition because a computer uses the pixel values of facial images in classifying faces. Fourth, we experimentally proved that the eyebrow feature enhanced the accuracy of computer-based face recognition. However, the problem of occlusion by hair should be solved in order to use the eyebrow feature for face recognition.

• 한국실내디자인학회논문집
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• 제21권1호
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• pp.280-288
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• 2012

The purpose of this study is to deduct influence factors by analyzing preferences for public design that can increase user satisfaction through differentiated identity of regions. The study methods are as follows. First, consider a concept and semantic change of public design through the relevant literatures and precedent studies and then understand application status of domestic and overseas public design. Second, extract design elements for regional differentiation through precedent studies and reclassify regional resources that have an effect. Third, understand the necessity level of public design for regional differentiation by targeting experts and research the extracted design element and the degree of reflection about regionality. Lastly, understand a correlation between design elements and influence factors about territorial regionality of public design based on the researched contents, and analyze the degree of reflection between each other. As a result of this study, a plan that used 'material' and 'color' had high preference on the aspect of design elements and this is an important element that can show regional differentiation of regions. public design of showing regional differentiation. Thus, it is considered that various methods of using 'material' and 'color' must be planned. 'Public space' among design territories was most effective, and the following was 'public facility'. In particular, 'public space' has high preference of using 'natural resources' and 'industrial resources', and therefore an effect of a plan that uses these is judged to be positive. This study can use these results as basic data that suggested the standard for utilization of regional factors for regional differentiation of public design.

• 대한치과의사협회지
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• 제58권11호
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• pp.670-682
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• 2020

This research examined the difference in cognitive load and the virtual presence depending on auditory feedback and task difficulty in haptic-based dental simulation. In the field of dental education, practice-centered training using handpiece has been crucial because a practitioner's psychomotor experience has a significant impact on the mastery of treatment skills. For the novice, it is necessary to reduce errors in dental treatment to enhancing skill acquisition in the haptic practice. In the training process, the force-feedback is crucial to elaborate subtle movement to guide what to do and how it should be hard or soft. However, It is not easy to add force-feedback to generate kinetic experience training. As an alternative method, we examined that auditory feedback can help learners' skill training. In this study, we analyzed how the presence/absence of auditory feedback at the different levels of task difficulty impacts learners' psychological demand and virtual presence in the virtual reality simulation. For this study, 29 dental college students participated in a dental simulation. The participants were grouped into two conditions that are with and without auditory feedback. Additionally, two consecutive tooth preparation tasks with different levels of difficulty were used in the simulation. The auditory feedback condition gives alarms to a learner when he treats a non-targeted tooth with a virtual handpiece. The user's cognitive load and virtual presence were measured to examine the effects of auditory feedback. The results revealed that the main effect was found in cognitive loads. Also, a significant interaction effect was shown in the virtual presence. We discussed the effective design methods for the virtual reality-based dental simulation through the result of this study.

• 자동차안전학회지
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• 제10권2호
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• pp.43-49
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• 2018

Southeast Asia is a strategic market for both technology and inspection system to enter simultaneously. At the core market is Vietnam which is know to have the fourth highest registration of motorcycles as of 2016. The Motorcycle Inspection System is a social regulation, furthermore, the impact of the system is delivered through indirect means such as minimization of social cost. Therefore, measurements on the perception of users on the needs for an inspection system serves as valuable data to simultaneously enter this markets. This research is an empirical study on the perception of Vietnamese users on the needs to adopt a motorcycle inspection system based on data collected through surveys and is aimed at conducting a preliminary investigation on consumer behavior in Vietnam. The empirical study conducted through surveys revealed that Vietnamese motorcycle users perceive the needs for an inspection system for maintenance, safe operations and selling used vehicles at a reasonable price. In addition, the study also verified that the safe operations factor has a moderating effect due to interaction between prevention of illegal vehicle and reduction of emission gases. This research results present implications in developing equipment adapted to the local area in order to enter into a strategic market. Moreover, it is expected that the findings will also serve as valuable data for bilateral cooperation between the two countries and the diffusion of technology.

• 한국콘텐츠학회논문지
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• 제20권3호
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• pp.267-274
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• 2020

클릭률(CTR) 예측은 사용자가 주어진 항목을 클릭할 확률을 추정하는 것으로 온라인 광고 수익 극대화를 위한 전략 결정에 중요한 역할을 한다. 최근 CTR 예측을 위해 CNN을 활용하는 시도가 이루어지고 있다. CTR 데이터는 특징 정보가 연관성 측면에서 의미 있는 순서를 갖지 않기 때문에, 임의의 순서로 배열될 수 있다. 하지만 CNN은 필터 사이즈에 의해 제한된 로컬 정보만을 학습하기 때문에 데이터 배열이 성능에 큰 영향을 줄 수 있다. 이 논문에서는 CNN이 수집할 수 있는 모든 로컬 특징 정보를 추출할 수 있는 데이터 배열 집합을 생성하고 생성된 배열들에 대하여 개별 CNN 모듈들이 특징들을 학습할 수 있는 다중 배열 CNN 모델을 제안한다. 대규모 데이터 세트에 대한 실험 결과에 따르면 제안된 모델은 기존 CNN 대비 AUC의 RI에서 22.6% 상승 효과를, 제안된 배열 생성 방법은 임의 생성 방법보다 3.87% 성능 향상을 달성하였다.

• 한국콘텐츠학회논문지
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• 제16권8호
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• pp.540-555
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• 2016

현대 예술은 사회구성원들과의 지속적인 상호작용을 통해 사회변혁을 주도하는 역할을 하고 있으며, 예술가의 작품은 시대의 사회 환경과 기록 등을 통해 창조적으로 재구성되는 사회 구성물로 이해 할 수 있다. 이러한 맥락에서 시대의 자료를 기록하고 보존해야 하는 것은 우리의 기본적인 과제이며, 기록 보존이 필수가 되어야 하는 현재, 아카이브의 중요성이 강조 되고 있다. 하지만 국내 아카이브는 단순히 자료 저장의 용도 외, 활용 되지 못하고 있는 실정이다. 따라서 디지털 화된 예술 문화기록의 다양한 활용방안과 창작활동을 증진시키기 위해 아트 아카이브 관련 실증 연구가 필요한 상황이다. 이에 본 연구에서는 상호작용성을 세분화하여, 기술수용모델을 적용한 결과, 이용자는 자신의 창작활동에 도움이 되는 유용한 정보를 용이하게 제공받을 수 있어야 하며, 상호작용성의 지각을 통해 이용의도가 증가되는 것으로 확인되었다. 본 연구 에서는 예술을 정보 기술의 측면에서 접근하고 매체의 특성을 적용한 상호작용성을 보다 구체화 하여 이용의도를 실증 연구하였다는 점에서 연구의 의미와 시사점을 찾을 수 있다.

• 한국주거학회논문집
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• 제25권6호
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• pp.93-100
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• 2014

Community child center is the facility of the highest number of children in child welfare facilities. But plan for the physical environment is not considered importantly because of insufficient finance. However impact of the physical environment in growing children is very closely related in terms of the emotional as well as a functional perspective. Therefore, it is necessary to understand current physical environment and to seek to find alternative methods that can be resolved space matters. As a basic study for this, in the present study we compare and integrate the design principles of child care facility guidelines. And we set up a framework of analysis to derive the design principles that are required in the target area. It is possible to analyze the environmental characteristics of community child center located in Gwang-ju from this framework, to obtain the flowing results. First, draw items are formation of inner direction, provide of environmental supportability, flexibility of use, healthy space. It can be understood that the emotional aspects and physical aspects should be considered comprehensively. Second, as a result of the case analysis, planning elements consideration of the functional aspects appeared high fulfillment rate generally. Planning elements of low fill rate ascertain result from the process take advantage of the narrow space and it was possible to ascertain the study for flexible utilization of space is not. As a result, in order to improve the problems of the target space, increasing the functionality is necessary and also requires consideration of sensitivity of the user's face.

• 한국IT서비스학회지
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• 제17권3호
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• pp.117-138
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• 2018

The purpose of this study is to empirically analyze the relationships between the Boundary Spanning Activities (BSA) of project team and system performance in ERP system development projects. We could theoretically classify the BSA in the ERP development projects into five categories on the basis of existing studies on the BSA in the research fields of organization theory, new product development, and information systems development. These five categories are 'Ambassador' activities, 'Task-coordinator' activities, 'Scout' activities, 'Sentry' activities and 'Guard' activities. And the relationship between the implementation level of activities included in each category and the project performance (system usage and users' satisfaction) was hypothesized with respect to five BSA categories. In order to test the hypotheses, we conducted on/offline survey of the participants who were involved in the ERP system development projects, and received 345 valid responses. The unit of analysis was the project team, and the total number of teams that survey participants belonged to were 103 ones. The Structural Equation Model Analysis using the SMART PLS 3.0 was applied to statistically testing the hypotheses. The results showed that 10 hypotheses among 12 hypotheses could be supported. The theoretical implications of this study can be summarized as following; first, redefining and categorizing the BSA (Boundary Spanning Activities) in the ERP system development projects, secondly, deriving measurement indicators of the implementation level for each BSA category and statistically proving the validity and the reliability of them, and finally, suggesting the theoretical background of expanding the management area of ERP systems development projects. Furthermore, the practical implication of this study is that concrete BSA items which are empirically derived can be utilized as effective guidelines for successfully implementing the BSA in the process of managing the ERP system development projects.

• 한국산학기술학회논문지
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• 제16권12호
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• pp.8195-8209
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• 2015

본 논문의 연구 목표는 뉴스 가치 평가에 근거한 중요 뉴스 자동 추천 및 개인화 방안을 제시하는 데에 있다. 뉴스 가치 평가는 전통적인 오프라인 신문에서 편집장들이 1면 뉴스를 선정할 때 사용하는 접근법으로 본 논문에서는 이를 시스템적으로 구현하는 방안을 제시한다. 이렇게 함으로써 콘텐츠 주제에 대한 전통적인 개인 선호 성향과는 다르게 뉴스의 사회적 가치에 대한 관심 성향을 기준으로 중요 뉴스를 선별할 수가 있다. 뉴스의 사회적 가치는 지면 신문의 기존 연구에서 제시한 사회적 중요도, 새로운 볼거리, 수용자 관련성, 인간적 흥미 4가지 기준을 준용하였고, 본 연구에서는 이를 시스템적으로 적용하기 위한 절차적, 구조적 방안을 도출하였다. 중요 뉴스의 선별 과정은 뉴스의 가치 평가를 위한 과정과 평가된 결과를 개인화하는 과정으로 구성된다. 실험을 통해 특정 시점에서의 각 온라인 뉴스 서비스들의 중요 뉴스들과 본 논문에서 제시한 기법을 통해 선별된 중요 뉴스들에 대한 사용자 만족도를 비교 평가하여 본 연구에서 제안하는 방법이 더 효과적임을 확인하였다.

• 한국게임학회 논문지
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• 제15권1호
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• pp.171-184
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• 2015

기존 게임 관련 연구를 살펴보면 게임의 수용, 사용자 만족, 지속사용 의도, 구전 의도와 같은 연구는 수없이 많이 진행되어 왔으나 서비스 회복의 개념을 게임 연구에 적용시킨 사례는 전무한 상태이다. 본 연구는 국내 주요 모바일 소셜 네트워크 게임 플랫폼인 카카오톡 게임을 중심으로 모바일 소셜 네트워크 게임 특성이 서비스 회복에 미치는 영향을 알아보고자 한다. 또한 공정성 이론과 혁신 확산 이론을 바탕으로 모바일 소셜 네트워크 게임 특성 요인을 분석하고 해당 요인들과 서비스 회복과의 인과관계를 규명하였다. 그 결과 적합성을 제외한 모든 모바일 소셜 네트워크 게임 특성이 서비스 회복에 직 간접적인 영향을 미친다는 사실을 밝혀냈다. 이러한 연구결과는 향후 게임 산업의 새로운 비즈니스 모델을 제시하고 위험 요소를 줄여주며 게임 관련 연구의 발전에 기여할 수 있는 참고자료로 활용될 것이라고 기대하고 있다.