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Analytic Solutions of Integral Moving Least Squares for Polygon Soups
Park, Taejung,Lee, Sung-Ho,Kim, Chang-Hun IEEE 2012 IEEE transactions on visualization and computer gr Vol.18 No.10
<P>This paper presents analytic solutions to the integral moving least squares (MLS) equations originally proposed by Shen et al. by choosing another specific weighting function that renders the numerator in the MLS equation unitless. In addition, we analyze the original method to show that their approximation surfaces (i.e., enveloping surfaces with nonzero \epsilon values in the weighting function) often form zero isosurfaces near concavities behind the triangle-soup models. This paper also presents error terms for the integral MLS formulations against signed distance fields. Based on our analytic solutions, we show that our method provides both interpolation and approximation surfaces faster and more efficiently. Because our method computes solutions for integral MLS equations directly, it does not rely on numerical steps that might have numerical-accuracy issues. In particular, unlike the original method that deals with incorrect approximation surfaces by iteratively adjusting parameters, this paper proposes faster and more efficient approximations to surfaces without needing iterative routines. We also present computational efficiency comparisons, in which our method is 15-fold faster in computing integrations, even with conservative assumptions. Finally, we show that the surface normal vectors on the implicit surfaces formed by our analytic solutions are identical to the angle-weighted pseudonormal vectors.</P>
A Study on Design Guidelines of Learning Analytics to Facilitate Self-Regulated Learning in MOOCs
( Taejung Park ),( Hyunjin Cha ),( Gayoung Lee ) 한국교육공학회 2016 Educational Technology International Vol.17 No.1
The purpose of this study was to develop design guidelines on the learning analytics which can help to promote students’ self-regulated learning (SRL) strategies in MOOCs learning environments. First of all, to develop the first draft of design guidelines, relevant literature review and case analysis on current MOOCs platforms such as edX, K-MOOC, Coursera, Khan Academy and FutureLearn were conducted. Then, to validate the design guidelines, expert reviews (validation questionnaires and in-depth interviews) and learner evaluation (in-depth interviews) were conducted. Through the recursive validation, the design guidelines were finalized. Overall, the final version of design guidelines on learning analytics to facilitate SRL strategies was suggested. The final design guidelines consist of 15 items in 10 categories related to the information analyzed based on individual student’s learning behaviors and activities on MOOCs environments. Moreover, the results of interview also revealed that the social comparisons, learning progress reports, and personalization might contribute to the improvements of their SRL competences. This study has an implication that MOOCs could offer a higher success or completion rate to students with low SRL skills by taking advantage of the information on learning analytics
게임 엔진을 이용한 GPGPU 기하 정보 병렬 처리 시각화 및 디버깅 환경 개발
박태정(Taejung Park) 한국컴퓨터게임학회 2017 한국컴퓨터게임학회논문지 Vol.30 No.3
This paper suggests a visual debugging plaftorm based on the game engine, Unity3D for massive parallel processing routines implemented in CUDA. In general, it is tiresome to debug or check the accuracy of numerical geometry information results calculated in a parallel way by GPU; usually, developers would pick and check each numerical value by rummaging overwhelming lines of seemingly meaningless numbers. This manual process is less productive and time-consuming. Also, it is not easy to produce some continuous movements of geometry information to check the validity of implemented CUDA codes for realtime geometry processing applications. To solve those problems, this paper presents a way to use Unity3D game engine to visually and interactively debug CUDA implementations. Also, some practical test results are presented with discussions on limitations of Unity3D as a CUDA debugging platform.
박태정(Taejung Park) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.11
해외에서 개발된 게임을 국내에 도입할 경우 국내 상황에 맞게 여러 요소들을 변경하는 작업이 필수적이다. 이 과정에는 번역도 포함되며 전체적으로는 현지화(localization, l10n)이라고 한다. 이 현지화 작업은 게임이 제작된 언어 및 문화권의 독특한 요소들을 게임을 도입하려는 환경에 맞게 변환하는 작업이 필수적이다. 본 논문에서는 게임 현지화 작업에서 특히 어려운 언어유희 번역 문제를 실제 어드벤처 게임 현지화 사례를 통해 제시하고 현장의 전문 번역사들이 일반적으로 시도하는 몇 가지 번역 유형을 살펴본다. 이러한 논의를 통해서 다른 매체와는 다른 게임 환경에서 적합한 언어유희 현지화 방식을 고찰한다. It is a necessity to localize various elements when one tries to introduce any games developed from foreign cultures and languages. This whole process is called “localization (l10n)” which inevitably includes translation tasks. In this process, one should convert multiple unique elements into the required cultural and linguistic environments. This paper provides actual localization cases of “puns” appear in an adventure game, which is especially difficult; also it presents several typical types of translations for the puns that professional translators try. By this observation, this paper discusses some characteristics of game, as a medium, which are different from those of traditional media and proper approaches to translate “puns.”
가상현실 기반 메이커 교육 프로그램 설계원리개발 및 적용 : 시뮬레이션 앱 구현을 중심으로
박태정(Taejung Park) 한국IT서비스학회 2020 한국IT서비스학회지 Vol.19 No.6
The current study aimed to develop the design principles for maker programs using virtual reality and apply them in developing a simulation mobile application. First, through collecting and analyzing the relevant studies and cases eight design principles with four components were derived. Then, these initial design components and principles were revised and improved in accordance with evaluations of an expert panel composed of three professors/researchers, two teachers, and two IT industrial experts. Based on the revised design principles, a VR simulation app for maker education was developed and evaluated on whether the principles were properly applied to the app development by the expert panel. The finalized eight design principles, as a research outcome, can contribute to the design and development of various types of educational programs that can replace the actual making experience even in educational fields where it is difficult to build maker spaces or provide materials and equipment. In the near future, empirical studies are expected to develop customized maker programs considering the characteristics, levels, and needs of students and verify their educational effectiveness.