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커패시턴스 센싱을 통한 섬유 입력 인터페이스 설계와 동작성 연구
정재훈,Jeong, Jae Hoon 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.6
This study proposes a fabric-type input device that provides mobility by using a weighted value based on the movement velocity between 16 individual capacitors composed of conductive textile. In addition, the proposed device measures the rate of change of dielectric permittivity based on pressure or touch and provides the function like a mouse. A capacitor is composed of a conductive material ($37m{\Omega}/sq$), where a coating of copper and nickel is applied to polyester, and the area of the capacitor is $10mm(W){\times}10mm(L)$. The lower layer is composed of non-conductive fabric having a thickness of 1.36 mm, and the interval between each capacitor is 8 mm with four columns and four rows. Before touch, the capacitance was 120 pF and after touch, the capacitance increased up to 820 pF. In a monitor having a resolution of $1920{\times}1080$, it was observed that the average mobility of a mouse was 60.89 mm and the standard deviation was 0.92 mm, while for a fabric interface, the average mobility was 965.77 mm and the standard deviation was 7.37 mm.
정상배란성 월경주기에서 혈청 인슐린유사 성장인자 결합단백질의 양상
정재훈,김정구,Jeong, Jae-Hoon,Kim, Jung-Gu 대한생식의학회 1999 Clinical and Experimental Reproductive Medicine Vol.26 No.1
The insulin-like growth factor (IGF)s are believed to one of several growth factors that play an adjunctive role in ovarian follicular development. These factors circulate bound to a family of IGF-binding protein (IGFBP)s. It is known that circulating IGFBPs are involved in the transport of IGFs to tissues and modulate IGFs actions at local tissue. The purposes of this study were to evaluate changes in serum IGFBPs profiles during normal ovulatory menstrual cylce and to compare serum IGFBPs profiles in periovulatory phase of between normal ovulatory menstrual cylce and controlled hyperstimulated cycle. Fasting blood samples were obtained from 15 normal healthy women throughout normal ovulatory menstural cyle and on the day of aspiration of oocyte from 10 patients undergoing ovarian hyperstimuation for in vito fertilization-embryo transfer. Serum IGFBP-1 - IGFBP-4 were measured by western ligand blot and immunoprecipitation. Serum $17{\beta}$-estradiol was determined by radioimmunoassay. Type and molecular weight of serum IGFBP did not changed during normal ovulatory menstural cycle. No significant variation in the relative proportion and level of each IGFBP was found throughout normal ovulatory menstural cyle. Also, the relative proportion and level of each IGFBP did not correlated with serum $17{\beta}$-estradiol level. There was no significant difference in the relative proportion and level of each serum IGFBP between on the day of ovulation in normal ovulatory menstrual cylce and on the day of aspiration of oocyte in controlled hyperstimulated cycle. Our data indicate that IGFBPs have regulatory functions in ovary through an paracrine and autocrine rather than endocrine mechanism during normal ovulatory menstural cycle.
Guelph 투수계를 이용한 김해시 딴섬 강변여과수 지역의 지표 수리전도도 분포 조사
정재훈,김형수,Jeong, Jae-Hoon,Kim, Hyoung-Soo 한국지하수토양환경학회 2008 지하수토양환경 Vol.13 No.2
Guelph 투수계를 이용한 현장 토양 불포화 수리전도도의 산정기법을 제시하고 이 기법을 활용하여 강변여과수 취수계획 지역인 김해시 낙동강 딴섬 일대의 지표 특성을 조사하였다. 조사된 지표 포화 및 불포화 수리전도도의 값은 대규모 강변여과 개발에 대한 지하수 모델링 평가시 중요한 경계조건인 지표 함양량과 하천 경계조건을 설정하는데 활용될 수 있다. 딴섬의 지표 수리전도도는 상류에 조립질 입자가, 하류에 상대적으로 세립질 입자가 퇴적되었음을 보여주었고, 이러한 현상은 강의 부유물이 퇴적되는 특성을 반영하고 있다. 이러한 결과는 상대적으로 딴섬의 남측지역(상류)이 북측 지역(하류)에 비해 강변여과 방식 취수에 유리한 조건을 가질 수 있음을 시사한다. A method estimating unsaturated hydraulic conductivity using Guelph permeameter was developed and applied to the Ddanseom area of Kimhae in Nakdong River basin where the facilities producing bank-filtrated groundwaters are currently under construction. It is believed that the hydraulic conductivity values obtained from this study are useful in determination of recharges through unsaturated zone or from the river. The distribution of the surface hydraulic conductivity shows that sediments are finer downstream, implying the downstream part of Ddanseom has the higher potential of groundwater production.
정재훈,진상규,김훈,Jeong, Jae-Hoon,Jin, Sang-Kyu,Kim, Hoon 한국조명전기설비학회 1999 조명·전기설비학회논문지 Vol.13 No.3
형광등용 조명기구에 사용되는 경명 반사판의 광학 설계 프로그램을 개발하였다. 이 프로그램은 조명기구 설계시간을 단축시킨다. SpeROD(Specular Reflector Optical Designer)는 2차원적인 조건들을 가지고 계산한다. 반사판 설계를 위해 고려되는 조건들은 목표배광, 반사판 그리고 Tangent Spiral Design 방법등이 있다. 본 논문에서는 SpeROD를 이용하여 지름 26mm(T8)의 형광램프와 폭 150mm의 반사판을 가지는 균일 배광 형태와 Bat-wing 배광형태의 반사판을 설계해보았다. 설계된 반사판의 형태에 대하여 배광에측 프로그램인 FIELD를 통하여 배광을 시뮬레이션 해 본 결과, 배광과 효율 면에서 만족스러운 결과를 얻었다. SpeROD, the optical design program. is developed far specular reflectors of fluorescent luminaries. SpeROD can save much tirre when to design specular reflectors. SpeROD calculates conditions 2-dimensionally. The conditions for designing reflectors considered in this program are the intensity distribution, reflector type, and Tangent Spiral Design method. Using SpeROD, uniform intensity distribution type and bat-wing type reflectors are simulated in this paper, and alrrnn(T8) diarreter fluorescent lamp and lmnm width reflector are used for the setting. The sarre setting was simulated in FIElD, the intensity distribution prediction program. and the' result represented the intensity distribution and the efficacy simulated in SpeROD were satisfactory.actory.