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- 저자 : 한재형 ( Jae Hyung Han ) (검색결과 8 건)
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조절인공수정체를 삽입한 백내장수술 후 근거리 시력에 영향을 미치는 술 전 예후 인자
한재형,오태훈,김기산,정성근,Jae Hyung Han,Tae Hoon Oh,Ki San Kim,Sung Kun Chung 대한안과학회 2012 대한안과학회지 Vol.53 No.4
Purpose: To evaluate the prognostic factors to determine the uncorrected near visual acuity of patients who undergone routine cataract surgery and WIOL-CF? (Gelmed international, Kamenne Zehrovice, Czech Republic) accommodative intraocular lens implantation. Methods: This study evaluated 46 eyes of 27 patients who had undergone routine cataract surgery and WIOL-CF? accommodative IOL implantation. We checked visual acuities at near and distant before surgery. And we also checked age and gender of patients and manifest refraction, corneal astigmatism and axial length of eyes at that time. We analyzed association between these factors and uncorrected near visual acuity at postoperative 6 and 12 month. Results: Univariate linear regression analyses between uncorrected near visual acuity and preoperative patients characteristics suggested that the age of patients was the only statistically significant independent variable on uncorrected near visual acuity at postoperative 6 (p < 0.001) and 12 (p < 0.001) month. Multiple regression analyses also revealed the same results (p = 0.021 at postoperative 6 month and p = 0.042 at postoperative 12 month). Conclusions: This study suggest that the age is the one of the most important prognostic factors of postoperative uncorrected near visual acuity after WIOL-CF? accommodative intraocular lens implantation. J Korean Ophthalmol Soc 2012;53(4):510-515
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폴리디메틸실록산(PDMS)을 이용한 그래핀 전사법 개선을 위한 계면처리 연구
한재형,최무한,Han, Jae-Hyung,Choi, Mu-Han 한국응용과학기술학회 2015 한국응용과학기술학회지 Vol.32 No.2
In this paper, we study the dry transfer technology utilizing PDMS (Polydimethylsiloxane) stamp of a large single-layer graphene grown on Cu-foil as catalytic metal by using Chemical Vapor Deposition (CVD). By changing the surface property of the target substrate through $UV/O_3$ treatment, we can transfer the graphene on the target substrate while minimizing mechanical damages of graphene layer. Multi-layer (1~4 layers) graphene was stacked on $SiO_2/Si$ wafer successfully by repeating thetransfer method/process and then optical transmittance and sheet resistance of graphene layers have been measured as a quality assessment. 화학기상증착법(CVD)을 이용하여 Cu-foil 위에 합성된 대면적의 단층 그래핀(Graphene)을 폴리머 탄성융합체 PDMS(Polydimethylsiloxane)를 이용하여 건식으로 전사하는 기술을 연구하였다. 이때, $UV/O_3$처리를 통해 목표 기판(target substrate)의 표면 개질을 변화시켜 그래핀의 손상이 최소화되로록 그래핀을 전사하였다. 이 과정을 반복 실행하여 그래핀을 다층(1~4 layers)으로 $SiO_2/Si$기판 위에 적층하였으며, 전사된 다층 그래핀의 품질평가를 위하여 광투과율과 면저항의 변화를 측정하였다.
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초등학교 고학년 저소득가정 학생의 학업적 자기효능감 증진을 위한 집단상담 프로그램 개발
한재형 ( Jae Hyung Han ),유형근 ( Hyeong Keun Yu ),정연홍 ( Yean Hong Jeong ) 한국아동교육학회 2015 아동교육 Vol.24 No.2
본 연구는 초등학교 고학년 저소득가정 학생의 학업적 자기효능감 증진을 위한 집단상담 프로그램을 개발하여, 그 효과를 검증하는 데 목적이 있다. 이를 위해 학업적 자기효능감 증진과 관련된 선행연구 분석 및 요구조사를 실시하였으며 예비 프로그램을 구안한 후 전문가의 자문을 거쳐 최종 프로그램으로 완성하였다. 12회기로 구안된 프로그램은 초등학교 5∼6학년 학생 중 저소득가정 학생을 대상으로 적용하였으며 실험집단과 통제집단의 학업적 자기효능감 변화를 비교하였다. 연구결과 실험집단의 학업적 자기효능감 사전·사후검사 변화는 통제집단과 유의한 차이를 보였으며 경험보고서 분석과 상담자의 관찰내용을 통해 프로그램에 참여한 학생들의 긍정적인 변화를 확인할 수 있었다. 이상의 결과를 바탕으로 저소득가정 학생의 학업적 자기효능감 증진 집단상담 프로그램에 대한 논의와 시사점을 제시하였다. The purpose of this study is to enhance academic self-efficacy for senior students of elementary school from low-income families and test its effect on academic self-efficacy. Main objectives are as follows : First, how will the group counseling program be constructed to enhance academic self-efficacy? Second, when the group counseling program to enhance academic self-efficacy is administered, what its effects on academic self-efficacy for elementary school students from low-income families? For this research, the 13 students in grade 5-6 grades of A elementary school from low-income families in the experimental group, the 13 students in grade 5-6 grades of B elementary school from low-income families with similar environmental conditions located near were constructed in the control group. This implementation of program was designed for a total of twelve sessions and was conducted during after school basis two times per week. To complement the limitation of reliability in quantitative study, the experience reports of the program participants and the observational data from the counselor were also analyzed and their results were presented. The results obtained from this study, the e was significant difference in the change of the academic self-efficacy maturity between the experimental group that participated in the program and the control group. The program was developed based on the result of this survey to develop a group counseling program that reflects the needs of the students.
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김헌영,한재형,이종근,Kim, Heon-Youog,Han, Jae-Hyung,Lee, Jong-Keun 한국철도학회 1999 한국철도학회논문집 Vol.2 No.1
The purpose of this study is to suggest the effective analytical procedure using finite element model for the crashworthiness of motorized trailer of high speed train. The static crush of rectangular section frame is analyzed by experiment and numerical simulation. The equivalent thickness distribution of the aluminum frame ensuring the same energy absorption as the steel frame is obtained. In the analysis of end-on collision of TGV-K, deformed pattern and section forces are obtained, and the effect of crushable zone are examined. The numerical results are applied to the design of motorized trailer of Korean high speed train.
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김헌영(Kim Heon Young),김상범(Kim Sang Bum),한재형(Han Jae Hyung) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
Train crashes involve complex interaction between deformable bodies in multiple collisions. The purpose of this study is to suggest the effective analytical procedure using simple model for the crashworthiness of motorized trailer of high speed train. The simple model, with very short modeling time and reduced computation time was adopted to extract the global behaviour and to perform a pre-optimization of the considered structure. Firstly, various types of crash events are investigated and the conditions for numerical simulation are defined. The simple model, using the beam and non-linear spring element, and shell element model are used to evaluated energy absorption and deformation mechanism in analyses. And aluminum is applied to real model after verification with square tube analyses. Finally, loading path and energy absorption of main components are evaluated. The analyses are aimed to ensure the crashworthiness design of high speed train.
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한재형,김헌영,이종근 江原大學校 産業技術硏究所 1998 産業技術硏究 Vol.18 No.-
Train crashes involve complex interaction between deformable bodies in multiple collisions. The purpose of this study is to suggest the effective analytical procedure using finite element model for the crashworthiness of motorized trailer of high speed train. Various types of crash events are investigated and the conditions for numerical simulation are defined. Finally korean high speed train which consists of aluminum members can be analyzed and designed by the numerical simulation.
KCI
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