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김현찬 ( Hyun Chan Kim ) 대한폐경학회 2008 대한폐경학회지 Vol.14 No.3
Anticipating the old aging society, the field of Geriatric Gynecology has to be reconsidered and emphasized. Atypical presentation and concomitant disease occurrence are rather common among old aged women. As to the evaluation of health state, the physiologic condition is more important than chronologic age of the patient. In addition to the careful listening to the history, the simplified systematic assessment guidelines are essential for the proper primary and specialized care and management as well as preventive measure. For the ambulatory office practice, a brief description of clinical aspects concerned are given. In addition short description on the Osteoporosis, Breast cancer, Sleep disturbance, Depression and Dementia are affixed in Part -1. Under the same thesis in Part -II, common complaints, concomitant disease conditions, leading causes of morbidity and death will be presented later.
Optical and Electro-Active Properties of Polyacrylamide/CNC Composite Hydrogels
Hyun Chan Kim(김현찬),Xiaoyuan Gao(고소원),Tippabattini Jayaramudu(자야라무두티파바티니),Jinmo Kang(강진모),Jaehwan Kim(김재환) Korean Society for Precision Engineering 2017 한국정밀공학회지 Vol.34 No.8
Polyacrylamide (PAM) was used for matrix material to fabricate composite hydrogels reinforced with natural cellulose nanocrystal (CNC). Invoking in situ free-radical polymerization with different concentration of cellulose nanocrystal, polyacrylamide hydrogels were fabricated. The chemical structure, compression strength, morphology and dielectric properties of the composite hydrogels were investigated. The CNC played a role as a reinforcing filler and a multifunctional cross-linker in the hydrogel. The elastic modulus and dielectric property of the composite hydrogels increased as increasing the CNC concentration. The electrical actuation test of the PAM/CNC hydrogel shows its possibility for soft electro-active materials for active lens.
Fabrication and Characterization of Array Tactile Actuator Based on Cellulose Acetate
Hyun-Chan Kim(김현찬),Sungryl Yun(윤성률),Hyun-U Ko(고현우),Jaehwan Kim(김재환) Korean Society for Precision Engineering 2015 한국정밀공학회지 Vol.32 No.8
This paper reports the enhanced fabrication and characterization of a 3 × 3 array tactile actuator composed of cellulose acetate. The array tactile actuator, with dimensions of 15 × 15 × 1 ㎣, consists of 9 pillar-supported cells made from a cellulose-acetate molding. The fabrication process and performance test along with the results for the suggested actuator are explained. To improve the cell-array fabrication, a laser cut was adopted after the molding process. The displacement of the unit cell increased the input voltage and frequency. Various top masses are added onto the actuator to mimic the touch force, and the acceleration of the actuator is measured under actuation. When 2 kV is applied to the actuator, the maximum acceleration is 0.64 g, which is above the vibrotactile threshold. The actuation mechanism is associated with the electrostatic force between the top and bottom electrodes.
김현찬 ( Hyun Chan Kim ),승희진 ( Hee Jin Seung ),이병재 ( Byoung Jai Lee ),김우경 ( Woo Gyeong Kim ) 대한폐경학회 2009 대한폐경학회지 Vol.15 No.3
Facing to the recent aging society, Geriatric Gynecology is on the developing phase. The clinical features and co-morbidity of the aged woman are somewhat different from those of the younger. The Gynecologist as a primary physician and also a specialist has to cope with the demanding care of the aged, Therefore a guide, based on working knowledge, would be helpful for the better care of them. In this review, Items among the leading causes of morbidity/mortality and common complaints are selected and described briefly. (J Korean Soc Menopause 2009;15:145-163)
박기현 ( Ki Hyun Park ),이봉근 ( Bong Geun Lee ),정대훈 ( Dae Hoon Jeong ),이경복 ( Kyung Bok Lee ),김기태 ( Ki Tae Kim ),김현찬 ( Hyun Chan Kim ) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.12
목적 : 자궁내막암 환자에 있어서 예후인자들과 림프절 전이와의 상관관계를 알아보고 림프절 전이의 지표를 평가하기 위해 본 연구를 시행하였다. 연구 방법 : 1988년부터 2001년까지 본원에서 자궁내막암으로 진단받고 림프절 절제술 혹은 림프절 생검을 시행받은 49명을 대상으로 후향적 연구를 시행하였다. 예후인자로는 나이, 비만도, 조직학적 분류 및 분화도, 자궁근층 침범정도, 자궁경부 침범정도, 자궁부속기 전이유무, 종양 크기, 에스트로젠 및 프로제스테 Objective : To determine the valuable predictors of lymph nodes metastasis by analysing correlation with some prognostic factors in women with endometrial cancer. Methods : A retrospective study was conducted in 49 women with endometrial cancer who underw