• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2003년도 춘계학술발표대회 논문집
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• pp.61-64
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• 2003

The finite element method based on the refined beam theory is applied to the vibration problem of rotation composite box beams. The present beam model includes a number of non-classical structural effects such as transverse shear, warping deformations, geometric non-linearities. The nonlinear finite element equations of motion are obtained from Hamilton's principle. Vibration characteristics versus various parameters such as ply angle, collective pitch angle, pretwist and precone are investigated for rotation box ben and relevant conclusions are outlined.

• 한국멀티미디어학회논문지
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• 제20권9호
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• pp.1502-1508
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• 2017

A musical key is a fundamental concept in Western music theory. It is a collective characterization of pitches and chords that together create a musical perception of the entire piece. It is based on a group of pitches in a scale with which a music is constructed. Each key specifies the set of seven primary chromatic notes that are used out of the twelve possible notes. This paper presents a method that identifies the key of a song using Hidden Markov Models given a sequence of chroma features. Given an input song, a sequence of chroma features are computed. It is then classified into one of the 24 keys using a discrete Hidden Markov Models. The proposed method can help musicians and disc-jockeys in mixing a segment of tracks to create a medley. When tested on 120 songs, the success rate of the music key identification reached around 87.5%.

• Asian Journal of Business Environment
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• 제5권1호
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• pp.37-41
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• 2015

Purpose - The study was designed to explore and examine the business relationships of the owners and the employees of Market Basket to analyze the implications of their recent turbulence and decisions. This article focused on two issues - business profit and labor union - to describe the uniqueness of this case. Design, methodology, data, and approach - This article, based on its purpose, applied all three approaches of case studies that are identified and described by Stake (1995), instrumental, intrinsic, and collective, to present the core nature of the issue and to improve and gain a clear understanding of this particular phenomenon. Results - The analysis of this case clearly indicates that seemingly dichotomous concepts of profit and employee welfare are not necessarily antithetical to each other Conclusions - The instant case of Market Basket serves as a testimonial for the rejection of the basic premises of corporate profits and labor unions. This case serves as a model and a practical example for many large retailers, especially the family operated retailers, and workers throughout the world.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제15권2호
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• pp.181-196
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• 2011

In mathematical modeling tasks, where students are exposed to model-eliciting for real and open problems, students are supposed to formulate and use a variety of mathematical skills and tools at hand to achieve feasible and meaningful solutions using appropriate problem solving strategies. In contrast to problem solving activities in conventional math classes, math modeling tasks call for varieties of mathematical ability including mathematical creativity. Mathematical creativity encompasses complex and compound traits. Many researchers suggest the exhaustive list of criterions of mathematical creativity. With regard to the research considering the possibility of enhancing creativity via math modeling instruction, a quantitative scheme to scale and calibrate the creativity was investigated and the assessment of math modeling activity was suggested for practical purposes.

• 대한기계학회논문집
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• 제18권11호
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• pp.2967-2972
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• 1994

The multiple character of the contact interaction and the collective behavior of elementary microcontacts play a significant role in all the processes occurring in the surface layers, including the failure due to friction and wear. The array of metal spheres compressed between flat plates has been used for simulation of the contact behavior of multiple contact of solids under normal loading. An experimental design has been made providing regular array of the spheres at the same size with different spatial order. Measurement of electrial contact resistance has been made using the equipment providing the adequate accuracy in the range of micro Ohms. The data on electrical contact resistance have been compared with theoretical predictions using the multiple contact model of constriction resistance. The effect of single spots number and array on conductivity of contact has been evaluated.

• International Journal of Contents
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• 제5권1호
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• pp.1-8
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• 2009

The new paradigm called the web 2.0 recently appeared in the web environment. We pay attention to the positive effects which may be brought about by application of the web 2.0 to e-learning; we think that it can improve problem solving skills of learners and reinforce their creativity. But until now, e-learning model, which understood the web 2.0 concept completely, has been never developed. In this context, we propose the web 2.0-based e-learning platform which induces all the courses for education such as the selection of topic, preparation of lecture schedule and contents, teaching and learning, to be decided by participants. We believe that this platform can replace or supplement the e-learning of web 1.0 age, and realize the positive effects.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 춘계학술발표대회
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• pp.1406-1409
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• 2012

최근 학문간 융합을 통한 STEAM 융합인재교육에 관한 연구가 활발하게 진행되고 있다. STEAM 교육은 과학, 기술, 공학, 예술 그리고 수학의 학문 영역을 유기적으로 융합하여 차세대 학습자들이 미래 사회에 필요한 핵심역량을 높일 수 있도록 하는 교육방식이다. 국가적인 차원에서 창의적인 융합인재를 위한 미래형 과학기술 교육을 중요하게 여기고 있으며, 과학기술 교육 패러다임에 변화를 기대하고 있다. 따라서 본 연구에서는 융합형 인재양성을 위한 집단지성 기반의 STEAM 교육 방안을 연구하고, 학습자의 과학기술에 대한 흥미와 이해를 높이고 융합적 사고와 문제해결 능력을 배양하기 위한 지능로봇 교육과정을 제시한다. 또한 집단 학습자들 간의 교육 적용 사례를 소개하고, 학습자의 만족도 분석을 통하여 검증하였다. 향후 본 연구의 결과로 집단 학습자의 학습 성취도를 향상시키고, 융합형 과학기술 인재양성 교육방안으로 발전하기를 기대한다.

• Journal of Information Technology Applications and Management
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• 제25권4호
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• pp.145-156
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• 2018

This study proposes a content-based recommendation algorithm (NRA) for pet food. The proposed algorithm tries to recommend appropriate or inappropriate feed by using collective intelligence based on user experience and prior knowledge of experts. Based on the physical and health status of the dogs, this study suggests what kind of nutrients are necessary for the dogs and the most recommended pet food containing these nutrients. Performance evaluation was performed in terms of recall, precision, F1 and AUC. As a result of the performance evaluation, the AUC and F1 value of the proposed NRA was 15% and 42% higher than that of the baseline model, respectively. In addition, the performance of NRA is shown higher for recommendation of normal dogs than disease dogs.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2013년도 춘계학술발표대회
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• pp.1040-1043
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• 2013

최근 IT기술의 발전은 교육의 패러다임을 변화시키는 중요한 요소로 작용하고 있다. 이러한 IT의 기술이 학습환경을 변화시키며 학습모형에도 영향을 미치고 있는 것이다. 특히 창의적인 생각이나 새로운 아이디어를 중요시 하는 국가적 교육 경쟁력이 핵심으로 작용하면서 창의력 증진을 위한 학습모형 개발 연구가 활발하게 진행되고 있다. 따라서 본 논문에서는 하나의 지식보다는 그룹의 지식이 강조되는 집단지성 기반의 창의력 증진 학습모형 개발에 대한 연구를 진행하였다. 기존의 학습모형은 교수자 중심적으로 지식을 전달하는 방식 이였다면, 본 연구에서는 교수자와 학습자, 참여자라는 집단의 생성과 학습 자료의 공유, 개방을 극대화 한 창의력 증진학습 모형을 제시하고자 한다. 또한 창의력 증진 학습모형을 위한 기술과 교육 그리고 소셜 네트워크의 통합적 적용 설계 모델을 제시한다.

• Bulletin of the Korean Chemical Society
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• 제21권3호
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• pp.310-316
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• 2000

Molecular dynamics simulation studies for thermotropic liquid crystalline systems conposed of rodlike molecules with 6 Lennard-Jones interaction sites wre performed in NPT ensemble. Within the range of temperature studied, the system exhibited isotropic and smectic phase. For the characterization of the smectic phase, we examined the structure of the liquid crystalline phase via the radial distribution function, its longitudinal and transverse components to the director, and other orientational correlation function, its longitudinal and transverse components to the director, and other orientational correlation functions. In the smectic A phase, our results showed a large anisotropy in translational motion (i.e.,$D_⊥ >> D_∥$), and the decay of the collective orientational correlation function of rank two became slower than that of the single particle orientational correlation function of rank one. Comments on the spontaneous growth of orientational order directly from the isotropic phase are given.