A Study of the Reliability and Validity of the Korean Version of the Penn Alcohol Craving Scale for Alcohol-Dependent Patients

MinJeong Kim,SungGon Kim,HyoJeong Kim,HoChan Kim,JiHeh Park,KwangSeok Park,DukKi Lee,WonTan Byun,CheolMin Kim 대한신경정신의학회 2008 PSYCHIATRY INVESTIGATION Vol.5 No.3

Objective-The Penn Alcohol Craving Scale (PACS) is a stronger predictor of subsequent drinking and relapse of alcohol dependence that can be administered more quickly and easily than other craving scales. The goal of this study was to develop the Korean version of the Penn Alcohol Craving Scale (PACS-K). Methods-To examine the psychometric properties of the PACS-K, responses were chosen from 80 patients admitted to a treatment facility for alcohol dependence. Results-The PACS-K possesses good psychometric properties, as assessed by Cronbach’s α estimates (Cronbach’s α=0.91). The test-retest reliability of the PACS-K showed high correlation (p<0.01) when the retest interval was 1 day. When the validity of the PACS-K was investigated using correlation analysis with two other craving scales (the Obsessive Compulsive Drinking Scale (OCDS) and the Visual Analogue Scale (VAS), high correlations were obtained between total PACS scores and total OCDS scores, and between total PACS scores and VAS scores (p<0.01, respectively). Conclusion-The PACS-K is a reliable and valid measure of alcohol cravings, and it could be useful for predicting which individuals are at risk for subsequent relapse.

2차원 전기비저항토모그래피를 이용한 지하물체의 비파괴 영상화

김호찬(Hochan Kim),부창진(Changjin Boo),김세호(Seho Kim),좌종근(Chongkeun Jwa),오성보(Seongbo Oh),고봉운(Bongwoon Ko),김문찬(Moonchan Kim),김용석(Yongseok Kim) 대한전기학회 2005 대한전기학회 학술대회 논문집 Vol.2005 No.7

Power System Stabilizer using the Free Model

Kim Hochan(김호찬),Oh Seongbo(오성보),Lee Kwangyeon(이광연) 제어로봇시스템학회 2001 제어로봇시스템학회 국제학술대회 논문집 Vol.2001 No.10

Gate-Controlled Spin-Orbit Interaction in InAs High-Electron Mobility Transistor Layers Epitaxially Transferred onto Si Substrates

Kim, Kyung-Ho,Um, Doo-Seung,Lee, Hochan,Lim, Seongdong,Chang, Joonyeon,Koo, Hyun Cheol,Oh, Min-Wook,Ko, Hyunhyub,Kim, Hyung-jun American Chemical Society 2013 ACS NANO Vol.7 No.10

<P>We demonstrate gate-controlled spin-orbit interaction (SOI) in InAs high-electron mobility transistor (HEMT) structures transferred epitaxially onto Si substrates. Successful epitaxial transfer of the multilayered structure after separation from an original substrate ensures that the InAs HEMT maintains a robust bonding interface and crystalline quality with a high electron mobility of 46200 cm<SUP>2</SUP>/(V s) at 77 K. Furthermore, Shubnikov-de Haas (SdH) oscillation analysis reveals that a Rashba SOI parameter (α) can be manipulated using a gate electric field for the purpose of spin field-effect transistor operation. An important finding is that the α value increases by about 30% in the InAs HEMT structure that has been transferred when compared to the as-grown structure. First-principles calculations indicate that the main causes of the large improvement in α are the bonding of the InAs HEMT active layers to a SiO<SUB>2</SUB> insulating layer with a large band gap and the strain relaxation of the InAs channel layer during epitaxial transfer. The experimental results presented in this study offer a technological platform for the integration of III–V heterostructures onto Si substrates, permitting the spintronic devices to merge with standard Si circuitry and technology.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2013/ancac3.2013.7.issue-10/nn403715p/production/images/medium/nn-2013-03715p_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn403715p'>ACS Electronic Supporting Info</A></P>

Hofmeister anionic effects on hydration electric fields around water and peptide.

Kim, Heejae,Lee, Hochan,Lee, Gayeon,Kim, Haeyoung,Cho, Minhaeng American Institute of Physics 2012 The Journal of chemical physics Vol.136 No.12

<P>Specific ion effects on water dynamics and local solvation structure around a peptide are important in understanding the Hofmeister series of ions and their effects on protein stability in aqueous solution. Water dynamics is essentially governed by local hydrogen-bonding interactions with surrounding water molecules producing hydration electric field on each water molecule. Here, we show that the hydration electric field on the OD bond of HOD molecule in water can be directly estimated by measuring its OD stretch infrared (IR) radiation frequency shift upon increasing ion concentration. For a variety of electrolyte solutions containing Hofmeister anions, we measured the OD stretch IR bands and estimated the hydration electric field on the OD bond to be about a hundred MV?cm with standard deviation of tens of MV?cm. As anion concentration increases from 1 to 6 M, the hydration electric field on the OD bond decreases by about 10%, indicating that the local H-bond network is partially broken by dissolved ions. However, the measured hydration electric fields on the OD bond and its fluctuation amplitudes for varying anions are rather independent on whether the anion is a kosmotrope or a chaotrope. To further examine the Hofmeister effects on H-bond solvation structure around a peptide bond, we examined the amide I' and II' mode frequencies of N-methylacetamide in various electrolyte D(2)O solutions. It is found that the two amide vibrational frequencies are not affected by ions, indicating that the H-bond solvation structure in the vicinity of a peptide remains the same irrespective of the concentration and character of ions. The present experimental results suggest that the Hofmeister anionic effects are not caused by direct electrostatic interactions of ions with peptide bond or water molecules in its first solvation shell. Furthermore, even though the H-bond network of water is affected by ions, thus induced change of local hydration electric field on the OD bond of HOD is not in good correlation with the well-known Hofmeister series. We anticipate that the present experimental results provide an important clue about the Hofmeister effect on protein structure and present a discussion on possible alternative mechanisms.</P>

Scheduling and process planning for multiple material stereolithography

Kim, Hochan,Choi, Jae-Won,Wicker, Ryan Emerald Group Publishing Limited 2010 RAPID PROTOTYPING JOURNAL Vol.16 No.4

<B>Purpose</B> - To operate a multiple material stereolithography (MMSL) system, a material build schedule is required. The purpose of this paper is to describe a scheduling and process-planning software system developed for MMSL and designed to minimize the number of material changeovers by using low-viscosity resins that do not require sweeping. <B>Design/methodology/approach</B> - This paper employs the concept of using low-viscosity resins that do not require sweeping to minimize the number of material changeovers required in MMSL fabrication. A scheduling and process-planning software system specific to MMSL is introduced that implements four simple rules. Two rules are used to select the material to be built in the current layer, and two rules are used to determine at which layer a material changeover is required. The schedule for the material to be built depends on the material properties stored in a user-defined materials library. The developed algorithm produces sliced loop data for each material using the predetermined layer thickness from an input CAD model, and the four rules are applied at each layer. The algorithm then determines the build order for each material, the material-specific number of layers to be built, and whether or not sweeping is required. Output data from the program are the scheduling and process-planning report and the partitioned computer-aided design models to be built before changing a material according to the process planning. Two examples of the algorithm applied to multiple material parts are provided. <B>Findings</B> - The MMSL scheduling and process-planning software system is developed using Microsoft Visual C++7.0. For verification, a simple demonstration is conducted on a two material part where the process plan could be easily determined through intuition. A more complex multiple material part is also tested that consisted of four subparts. Several cases of resin assignment are tested showing that the ultimate scheduling and process planning vary significantly depending on the material combinations and specifications. These examples demonstrate that the strategy, method, and software developed in this paper can be successfully applied to prepare for MMSL fabrication. <B>Research limitations/implications</B> - Although the software system is demonstrated on two multiple material parts, more extensive work will be performed in the future on fabricating multiple material parts using the MMSL machine. It is expected that additional rules will be developed as additional limitations of MMSL are identified. It is also anticipated that particular emphasis will be placed on building without sweeping as well as development of advanced non-contact recoating processes. <B>Originality/value</B> - As designs incorporating multiple materials increase in the future and additive manufacturing (AM) technologies advance in both building out of multiple materials and fabricating production parts, the scheduling and process-planning concepts presented here can be applied to virtually any AM technology.

DED공정을 이용한 전단금형의 선택적 적층제작에서 결함의 관찰

김호찬(Hochan Kim),최성종(Sungjong Choi),서종덕(Songduk Seo) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

유전알고리즘을 사용한 EIT 영상복원

김호찬(Kim Hochan),문동훈(Moon Dongchun),김민찬(Kim Minchan),이윤준(Lee Yoonjoon) 제어로봇시스템학회 2001 제어로봇시스템학회 국제학술대회 논문집 Vol.2001 No.10

한국노인의 자아통합감 관련변인에 대한 메타분석

김일식(Kim, Ilsik),김계령(Kim, Gyeryung),서호찬(Seo, Hochan) 한국노년학회 2017 한국노년학 Vol.37 No.3

Meta-analysis was conducted on 56 studies published in Korea until April 2017 to systematically integrate factors of ego integrity of the elderly. The variables related to ego integrity were divided into 6 groups of variable, and the effect sizes were computed for each variable of their groups. The analysis results are as follows. First, the total effect size showed the middle effect size, and the effect size according to the variable group showed the largest effect size for the positive psychological variable group, followed by the negative psychological variable, the physical variable, the familial variable, the social variable and the demographic variable. Second, the largest effect size of the sub-variables on the each individual variable group showed positive psychological variable was life quality, negative psychological variable was depression, physical variable was health behavior, familial variable was children relationship, social variable was social support and demographic variable was economic status. As described above, suggesting that these variables may have a strong influence on ego integrity among the variables related to ego integrity because the quality of life, life satisfaction and depression were shown as the largest effective variables related to ego integrity. 본 연구는 노인의 자아통합감에 영향을 미치는 변인들을 통합적으로 살펴보기 위하여 2017년 4월까지 국내에서 출판된 56편의 연구를 바탕으로 메타분석을 실시하였다. 자아통합감 관련 변인들을 6개의 변인군으로 나누고 각각 변인군에 대한 하위변인별로 효과크기를 산출하였으며 분석결과는 다음과 같다. 첫째, 전체효과크기는 중간효과크기를 보였고, 변인군에 따른 효과크기는 긍정심리적변인군이 가장 크게 나타났으며, 부정심리적변인군, 신체적변인군, 가족적변인군, 사회적변인군, 인구통계적변인군의 순서로 나타났다. 둘째, 개별변인군에 대한 하위변인들의 효과크기는 긍정심리적변인군은 삶의 질, 부정심리적변인군은 우울, 신체적변인군은 건강행위, 가족적변인군은 자녀관계, 사회적변인군은 사회적지지, 인구통계적변인군은 경제상태가 가장 높게 나타났다. 상기와 같이 자아통합감과 관련된 변인들 중 삶의 질, 삶의 만족도 및 우울의 효과크기가 크게 나타남에 따라 이러한 변인들이 자아통합감 향상에 영향력이 클 수 있음을 시사하였다.

내열강 HEATVAR의 DED 적층시 인장강도 평가

김호찬(Hochan Kim),최성종(Sungjong Choi),이인환(Inhwan Lee) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.5