Haptic Tumor Augmentation: Exploring Multi-Point Interaction

Seokhee Jeon,Harders, Matthias IEEE 2014 IEEE transactions on haptics Vol.7 No.4

<P>We currently explore the application of haptic augmentation in the context of palpation training systems. The key idea is to modify real touch sensations with computed haptic feedback. In earlier work, we have introduced an algorithmic framework for determining appropriate augmentation forces during interaction at one contact point. In this paper, we present an extension of the approach to deal with manipulations at more than one contact location. At the heart of our method is the data-driven estimation of Hunt-Crossley model parameters in a pre-computation step. Feeding the parameters into a contact dynamics model allows us to approximate the feedback behavior of various physical tissue mock-ups. Further, we combine the parameter estimation with the tracking of the position of a stiffer inclusion in the mock-up. These data are employed to create a model of movement due to external forces. The combination of these models then allows us to represent and render the mutual effects at multiple contact points. Several experiments have been carried out on a setup with two haptic devices. Comparisons of recorded with simulated interaction data demonstrate the performance and potential of our method.</P>

Fabrication of ZnSn Thin Films Obtained by RF co-sputtering

Seokhee Lee,Juyun Park,Yujin Kang,Ahrom Choi,Jinhee Choi,Yong-Cheol Kang 조선대학교 기초과학연구원 2016 조선자연과학논문집 Vol.9 No.4

Surface Characterization of Zinc Selenide Thin Films Obtained by RF co-sputtering

Seokhee Lee,Yong-Cheol Kang,Jisoo Kang,Juyun Park 대한화학회 2022 대한화학회지 Vol.66 No.5

In this work, radio frequency magnetron sputtering was used to deposit zinc selenide thin films on p-type silicon (100) wafers and glass substrates in a high vacuum chamber. Several surface characterization instruments were implemented to study the thin films. X-ray photoelectron spectroscopy results revealed that oxidized Zn bound to Se (Zn-Se) at 1022.7 ± 0.1 eV becomes the dominant oxidized species when Se concentration exceeds 70%. Scanning electron microscopy coupled with energy dispersive spectroscopy showed that incorporating Se in Zn thin films will lead to formation of ZnSe grains on the surface. Contact angle measurements indicated that ZnSe-60 exhibited the lowest total surface free energy value of 24.94 mN/m. Lastly, ultraviolet-visible spectrophotometry and ultraviolet photoelectron spectroscopy data evinced that the energy band gap gradually increases with increasing Se concentration with ZnSe-70 having the highest work function value of 4.91 eV.

Fabrication of ZnSn Thin Films Obtained by RF co-sputtering

Seokhee Lee, Juyun Park, Yujin Kang, Ahrom Choi, Jinhee Choi, and Yong-Cheol Kang 조선대학교 기초과학연구원 2016 조선자연과학논문집 Vol.9 No.4

The Zn, Sn, and ZnSn thin films were deposited on Si(100) substrate using radio frequency (RF) magnetron cosputtering method. A surface profiler and X-ray photoelectron spectroscopy (XPS) were used to investigate the Zn, Sn, and ZnSn thin films. Thickness of the thin films was measured by a surface profiler. The deposition rates of pure Zn and Sn thin films were calculated with thickness and sputtering time for optimization. From the survey XPS spectra, we could conclude that the thin films were successfully deposited on Si(100) substrate. The chemical environment of the Zn and Sn was monitored with high resolution XPS spectra in the binding energy regions of Zn 2p, Sn 3d, O 1s, and C 1s. Keywords: Zinc Oxide, X-ray Photoelectron Sectroscopy, Thin Films

Performance Evaluation Systems and Organizational Performance

Seokhee Park 서울행정학회 2006 서울행정학회 학술대회 발표논문집 Vol.- No.-

This article empirically analyzes the effects of an organizational performance evaluation system on organizational performance in the 13 Korean state-owned enterprises. Many researchers have explored performance management through the use of performance evaluation mechanisms in the public sector. Therefore, this study analyzes the impact of the performance evaluation system on two dimensions; organizational competence and organizational productivity. It tests two research hypotheses with a simple interrupted time-series design using panel data sets comprising of 40 time-series(l965-2004) observations for 13 cross-sectional units(13 state-owned enterprises) on nine performance variables. For all analyses, six panel data models were estimated(Pooled OLS, Fixone, Fixtwo, Ranone, Rantwo, Parks). Finally, 13 state-owned enterprises were compared with eight local public enterprises. The analyses indicate that the performance evaluation system has had a positive effect on state-owned enterprises' performance, especially since 1993, when the system was reformed.

A Critique of the Korean Governmental Reform under the NPM Paradigm

Seokhee Park 서울행정학회 2008 서울행정학회 학술대회 발표논문집 Vol.- No.-

The recent governmental reforms fostered by the New Public Management movement over the world are often argued to emphasize the search for efficiency, quality and other market values at the expense of democratic accountability. On the other hand, challenging this view, some authors claim that results-based management reforms have the potential to enhance political accountability and representative democracy. There is, however, limited empirical evidence of this relationship, also, a variety of definitions of what the accountability means. This research uses some of experiences from the Korea's governmental reform movement to illuminate this relationship in practice. I will discuss whether the design features of the new systems were based on the explicit search for increased political accountability and the deepening of democracy. Also, I will explore critically the way to coordinate the search for the outcome or efficiency and democratic accountability, otherwise, in conflict.

Developmental patterns and the related factors of the gifted: 18 years after their identification

Seokhee Cho 한국영재학회 2004 영재교육연구 Vol.14 No.3

To find out achievement, personality characteristics, family characteristics, and developmental patterns of the 65 young adults and 60 of their parents were followed up 18 years after their identification of giftedness at the age of 3 to 5. Only 12% of them attended colleges of high academic standing and the rest have not achieved as much as their potential predicted. Their developmental patterns were classified into 4 different ones: The full boomer, the everchanging, the fade away, and the late bloomer. The fullbloomer were characterized by their stronger preference for challenging tasks, family emphasis and supports for their studies and reading books in their early childhood. The everchanging were characterized by their parents who did not emphasize on study or reading in early years, but strong support for their study from junior high school period. The fadeaway and the late bloomer were characterized by the absence of parental support for learning throughout their schooling period. However, the fadeaway and the late bloomer were contrasting in their achievement motivation, academic self-concept, and social competency.

Fluralaner treatment for canine demodicosis in mongrel dog

Seokhee Son,Soonnam Choi,Tai-young Hur,Won-young Lee,Kyoungwon Lee,Hyunjhung Jhun 한국실험동물학회 2017 한국실험동물학회 학술발표대회 논문집 Vol.2017 No.2

Nurturing Creative Problem Solving Ability of the Gifted in Confucian Society

Seokhee Cho 韓國英才學會 2007 영재교육연구 Vol.17 No.2

유교문화는 창의적 문제해결력의 계발과 발휘를 방해하는 것으로 이해되어 왔다. 그러나 본 연구는 유교문화가 창의적 문제해결력 발휘에 방해가 되기만 한 것은 아님을 주장한다. 유교문화는 창의적 문제해결력의 계발에 도움이 되기도 하고 방해가 되기도 하였다. 창의적 문제해결력은 동기, 일반적인 지식과 기능, 특정 영역의 지식과 기능을 기반으로 확산적 수렴적 사고라는 도구를 사용할 때 발휘된다. 유교문화는 배움의 즐거움을 강조하며, 열심히 정진하는 자세의 소중함을 가르쳤고, 이로 인해 부모들은 높은 교육열을 끌어냈다. 그러나 유교문화 중에서도 위계사회에서 순종하고 타협하는 태도를 강조함과 계층 이동의 주요 수단으로서의 과거제도는 시험 문제 풀이에 치중하는 교육을 초래하여 창의적 문제해결력의 수단이 되는 사고기회를 박탈하고 학생들의 흥미, 호기심, 자아효능감 등을 저하시킴으로써 창의적 문제해결력의 발휘를 억제하는 부정적인 기능을 했다. 이런 문제점에 대한 인식을 바탕으로 영재의 선발과 학업수행에 대한 평가, 교육 프로그램의 개발 및 운영, 교사 연수, 대학입학전형 등을 개선하는데 필요한 방안을 제시했다. It has been understood that Confucian culture only blocks creative problem solving(CPS). However, it is claimed that Confucian culture exerts positive and negative influence on nurturing CPS. Confucian culture fosters CPS by urging strong motivation for learning, and building rich base of knowledge and skills in general and in specific domains through teaching joy of learning and hardworking fueled by parents' education fever. Confucian culture has negative influence on CPS with emphasis on obedience and conformity. Keju system, as a part of Confucian culture, resulted in excessive private tutoring to prepare for the high-stakes test, delimitation of students' experiences to matters to be tested, and students' weak interest, self-concept, and self-directed learning. Negative influence from Confucian culture on CPS is analyzed and some suggestions are provided for revising educational policies and educational practices in order to maximize the creative problem solving in Confucian countries.

생산기술엔지니어 업무생산성 향상을 위한 Digital Manufacturing과 ERP의 Interface 구축사례연구

한석희(Seokhee Han),함상범(Sangbeom Ham) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The interface between Digital Manufacturing and ERP was accomplished for M-BOM data transfer as a first success reference for DELMIA DPE and SAP/R3 user. This implies an improvement of Manufacturing Engineer's Business Productivity in terms of time saving from the simple and boring job, regular process with less value such as typing into the ERP, avoiding of any engineers' mistakes, and also with less stress without abnormal work load due to the unexpected delay of job to the goal. The characteristics of this methodology which is adopted in this case between DM and ERP are I) Hub and spoke topology(A hybrid topography where a single node acts an interconnection point for other nodes), 2) Complex link type(API and RFC), 3) Standard interface method(SOAP, RFC). As a proven methodology of this interface, it will be adapted stably to the similar project.