• 대한치과의사협회지
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• 제14권12호
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• pp.951-967
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• 1976

정상교합인 179명과 , 악관절이상환자 12명, 그리고 악관절이상환자중 국소마취를 한 6명, 총 197예의 대상에 교근의 Jaw-Jerk Reflex를 야기시키기 위하여 Spring Triggered Tapping Device를 하악골유간부에 장치하고, 교근에 쌍극은판전극을 부착하여 Functional Switch Assembly 를 통하여 Preamplifier(461 B형, Beckman)에서 증폭된 활동전압을 Dynograph (RS형 9853A, Beckman)에서 직접 기록하였다. 기록된 근전도는 Computer (Univac 9400 Cobol Complier)로 분석하여 다음과 같은 결론을 얻어 이에 보고하는 바이다. (1) 정상교합인 ; 남자 평균 21msec, 여자 20msec, 남여평군 20±5.99msec (S.D.)였다. (2) 악관절이상환자 : 남자평균 39msec, 여자38msec, 남여평균 39±13.57msec (S.D.) (3) 국소마취를 시행한 악관절이상환자 ; 남자평균 21msec, 여자 18msec, 남여평균 19msec (4) 179명의 정상교합인중 34명은 Masseteric Slient period가 나타나지 않았다. (5) 정상교합인과 악관절이상환자가 중복될 수 있는 기간은 31~33.5msec 였다. (6) 정상교합인과 악관절이상환자와의 경계는 32.2msec 였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 추계학술대회 논문집
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• pp.197-201
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• 2003

액정 디스플레이의 백라이트에 사용되는 냉음극 방전램프(CCFL: Cold Cathode Fluorescent Lamp) 구동 인버터의 설계함에 있어 압전 변압기(Piezoelectric Transformer)를 사용하였으며, 파라미터 선정 및 최적화를 하여 실험을 통해 검증하였다. 적용한 압전 인버터로는 푸시-풀(Push-pull)과 하프-브리지(Half-bridge) 회로이며, 휘도 제어기법으로는 아날로그(Analog)와 버스트(Burst) 방법을 사용하였다. 푸시-풀 인버터의 경우 아날로그 제어방식으로 제어전압 2.5-4.5V에서 출력전류 1-6mA(최소)로 휘도 $0-100\%$ 특성을 보였다. 입출력 효율로 18.6(최소)-90.3(최대)$\%$를 얻었으며, 버스트 제어방식에서는 듀티비 $5-50\%$에서 1-6mA의 제어성능을 보였다. 인버터의 입출력 효율은 13.6(최소)-82.1(최대)$\%$를 얻었다.

• Journal of Astronomy and Space Sciences
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• 제13권2호
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• pp.181-197
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• 1996

CCD 지구 영상 실험 장치(CCD earth image experiment, CEIE)는 우리별 I호의 주 탑재체중의 하나이다. 우리별 1호가 발사된 후에 CEIE는 이제까지 약 500여장의 세계 곳곳의 지표면 영상을 촬영하였다. 내재한 방사학적(radiometric) 오차 및 기하학적(geometric) 찌그러짐으로 인해, 관측된 영상은 지표면의 모습과 아주 다르다. 이러한 영상 데이터롤 다양한 목적의 응용을 위해 처리하고 분석하기전에 이러한 오차를 제거하기 위한 전처리 과정을 반드시 수행하여야한다. 이 논문은 CEIE:의 운영 결과를 요약하고 방사학적 및 기하학적 보정을 수행하는 전처리 과정을 설명한다.

• Asia pacific journal of information systems
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• 제13권1호
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• pp.197-211
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• 2003

Intensified competition, splintered mass market, shortened product life cycles, and advanced technology and automation let companies to crease the IT investment to meet the changes, Although IT investment increased, IS didn't show the visible outcome. One of the major interest of IS managers is how to demonstrate the business value of the firm's investment in information technology. This paper proposes the revised model of Nelson & Cooprider(1990) regarding shared knowledge between IS and line groups. Knowledge can be shared through mutual trust, mutual influence and communication between these two groups. The revised model including communication is tested empirically using LISREL. The results show that shared knowledge mediated the relationship between IS performance and mutual trust, mutual influence and communication. And shared knowledge between IS and line groups increase IS performance. IS managers should develop mutual trust, mutual influence and communication between these groups to achieve more shared knowledge and higher IS performance.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권3호
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• pp.197-216
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• 2009

The purpose of this study was to investigate middle and high school mathematics teachers' levels and multiple approaches in United States practicing their abstraction levels and, different strategies and method of solutions towards given number theory problems. The mathematics teachers taking part in this study are consisted of 25 members of online graduate and undergraduate course (MAE 5641 and MAE 4813) delivered through Online Learning System called as the Blackboard (http://www.blackboard.com). Data collection methods include journal entries, written solutions to problems, the teachers' reflections on said problems, and post interviews. Data analysis was done based on [Hazzan, O. & Zazkis, R. (2005). Reducing abstraction: The case of school mathematics. Educ. Stud. Math. 58(1), 101-119]. Analysis of students' written solutions revealed that transitions among the solution methods have major effect on abstraction levels. Elevation and reducing abstraction is a dynamic process.

• Korea-Australia Rheology Journal
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• 제13권4호
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• pp.197-203
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• 2001

We reported on the eletrorheological (ER) properties of several semiconducting polymers including poly (p-phenylene) (PPP), poly (acene quinone) radicals (PAQRs), microencapsulated polyaniline (MPANI) and polyaniline (PANI) those we synthesized. The yield stress dependence on electric field strength for the ER fluids using these semiconducting polymers was mainly examined. The yield stress, which is an important design parameter for ER fluids, was observed to satisfy a universal scaling function, allowing that yield stress data for all the ER fluids examined in this study collapse onto a single curve for a broad range of electric field strengths. The proposed scaling function incorporates both the polarization and conductivity models.

• Journal of Applied Biological Chemistry
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• 제58권3호
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• pp.197-199
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• 2015

The composition of the essential oil of Ligustrum japonicum leaves was determined by GC-MS analysis. The major constituents of L. japonicum leaf oil were germacrene D (40.50%), ${\alpha}$-pinene (13.63%), (-)-${\beta}$-elemene (6.42%), ${\beta}$-caryophyllene (5.73%), and $\delta$-cadinene (5.47%). The acaricidal activities of L. japonicum oil were evaluated against acaridae and pyroglyphid mites. In the fumigant bioassay, the $LD_{50}$ values of L. japonicum oil were 16.48, 12.38, and $15.63{\mu}g/cm^3$ against Tyrophagus putrescentiae, Dermatophagoides farinae, and D. pteronyssinus, respectively. In the contact bioassay, the $LD_{50}$ values of L. japonicum oil were 8.02, 5.02, and $7.67{\mu}g/cm^2$ against T. putrescentiae, D. farinae, and D. pteronyssinus, respectively.

• 가족자원경영과 정책
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• 제13권2호
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• pp.65-83
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• 2009

The purposes of this study were to analyze the needs for the balance of work-family and to provide the related policies for dual worker family. We focused on the life area of educare and school. Data were collected from 197 working mothers who have 1 or more children under age 10. The findings were: 1) after-school programs, holidays on every alternate Saturday, arbitrary no school days were not appropriate to the working parents' everyday life patterns, so the paradigm and practical conditions should be adapted to the needs of working parents. 2) the most working parents depended on the kindergarden, but the parents' satisfaction with the quality of service, time duration, the human resource of educare teacher was not sufficient, so these issues should be discussed more profoundly.

• Archives of Pharmacal Research
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• 제13권2호
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• pp.192-197
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• 1990

The microviscosites of the lipid bilayers of liposomal membranes of phospholipids were measured by the intermolecular excimer, formation method employing pyrene as a fluorescence probe, and the effects of n-alkanols and other local anesthetics on the microviscosity were investigated. The results showed that the n-alkanols and the ohter local anesthetics effectively lowered the microviscosity of the lipid bilayer of the dipalmitoyl phosphatidycholine liposomal membrane in proportion to the concentration of the additives. Moreover, there was a fairly good correlation between the ocal anesthetic activities and the microviscosity-lowering activities of these drugs. This results suggests that the nerve blocking activity of local anesthetics might have some relation with their activity fluidizing the lipid bilayer of biomembrane.

• Journal of Applied Biological Chemistry
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• 제42권4호
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• pp.197-201
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• 1999

Antagonistic bacteria active against phytopathogenic fungi, Phytophthora capsici, Pythium ultimum, Rhizoctonia solani, Botrytis cinerea, and Fusarium oxysporum were isolated from greenhouse soils. An antifungal compound was extracted by ethyl acetate from acidified culture filtrate and purified through column chromatography and thin layer chromatography. Activity-guided bioassay was followed throughout the purification steps using Pythium ultimum as a test organism. The purified antifungal compound was identified as phenylacetic acid (PAA) based on the data obtained from IR, EI/MS, $^1H-NMR$, and $^{13}C-NMR$. Two different isolates, which had vast differences in differential characteristics except 16S rDNA sequence homology, produced the same compound, phenylacetic acid. $ED_{50}$ values of the phenylacetic acid against P. ultimum, P. capsici, R. solani, B. cinerea, and F. oxysporum were 45, 21, 318, 360, and 226 ppm, respectively.