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염증성 치은에 대한 Nd:YAG laser 조사효과에 관한 임상적 연구
조형수,김현섭,임기정,김병옥,한경윤,Cho, Hyung-Soo,Kim, Hyun-Sup,Lim, Kee-Jung,Kim, Byung-Ock,Han, Kyung-Yoon 대한치주과학회 1996 Journal of Periodontal & Implant Science Vol.26 No.2
Periodontal disease is characterized by destruction of supporting tissues caused by invasion of plaque bacteria and defense mechanism of host. Many dentists are very interested in laser therapy on various intraoral soft tissue lesions including inflammatory periodontal pocket. In order to determine the therapeutic effect of intrapocket irradiation of a pulsed- Nd : YAG laser on the inflammatory periodontal pockets, bilateral 60 teeth with 4-6mm in probing pocket depth and gingival inflammation were selected and evaluated by sulcus bleeding index(SBI), and plaque index(pI) for baseline record. Intrapocket irradiation($300{\mu}m$ fiber optic, I.5W power, for 2 min.) of a pulsed-Nd : YAG laser(EL.EN.EN060, Italy) was applied on half of them. As the control group, the same procedure except power-off was repeated on the contralateral 30 teeth. At 1-, 2-, 3-, and 4-week after intrapocket manipulation, every tooth was reevaluated by the same clinical indices. And the difference between the lased group and control group was statistically analyzed by paired t-test and Chi-square test in Microstat program. Following results were obtained: 1. Until I-week and 2-week after intrapocket manipulation, SBI was lowered in both lased group and control group, compared to baseline SBI, but from 3-week after, the recovering tendency toward baseline was noted, and at only 2-week after, the number of teeth showing lowered SBI was significantly more in lased group than in control group(p<0.05). 2. PI of both lased group and control group was lowered through whole experimental period from I-week to 4-week after, compared to baseline PI(p<0.05), but there was no significant difference between lased group and control group(p>0.1). The results suggest that intrapocket irradiation of a pulsed-Nd:YAG laser may lead somewhat remission of gingival inflammation, but for more favorable therapeutic result the thorough root planing should be necessarily accompanied with gingival curettage.
조형수,정해양,김길환,고동연,이상배,Cho, Hyung-Su,Chung, Hae-Yang,Kim, Gil-Hwan,Koh, Dong-Yean,Lee, Sang-Bae 한국광학회 2007 한국광학회지 Vol.18 No.1
Photonic crystal fibers(PCFs) with silica cores within an away of air holes have unique properties. Broad band single-mode and the octave-spanning supercontinuum generation, impossible to achieve in classical fibers, can be realized. The design of PCFs is very flexible. There are two parameters to manipulate: air hole diameter, and lattice pitch. We introduced a fabrication process for control of the parameters to obtain endlessly single mode PCF, which is single mode in a large wavelength range, and highly nonlinear PCF. The numerical analysis and experiments are included. 실리카 코어 주변에 주기적인 공기층을 가지는 광자결정 광섬유는 넓은 파장 영역을 통한 단일모드의 구현 또는 1옥타브 이상의 광대역 연속광 발생과 같은 기존의 광섬유로는 불가능한 독특한 특성을 갖도록 유연하게 설계할 수 있다. 광자결정 광섬유의 설계에 사용되는 변수로는 공기층의 직경과 간격이 있으며 이러한 변수의 조절을 위한 공정을 도입하여 넓은 파장영역을 통한 단일모드 구현과 높은 비선형 특성을 가지는 광자결정 광섬유를 각각 제작 하였고 수치적 계산과 실험을 통해 그 특성을 살펴보았다.
초기 골 접촉이 없는 수산화 인회석 피복 임프란트 주위 골의 치유
조형수,신광용,김흥중,박주철,한경윤,김병옥,Cho, Hyung-Soo,Shin, Kwang-Yong,Kim, Heung-Joong,Park, Joo-Cheol,Han, Kyung-Yoon,Kim, Byung-Ock 대한치주과학회 1999 Journal of Periodontal & Implant Science Vol.29 No.2
Implant stability is the key to long-term successful outcome for osseointegrated implants. To evaluate the initial healing response of bone around HA-coated implants without primary bone contact. 21 HA-coated thread type implants(STERI-OSS?) were placed in the femurs of 5 mongrel dogs, about 1-year old. Implants, 8 mm in length and 3.8mm(experimental 1group), 5.0mm(experimental 2group) and 6.0mm(control group) in diameter, were inserted after 3 holes of 6.0mm in diameter and 10mm in depth were prepared in the surgical sites each dog. Implants were supported by only nonresorbable membrane($Teflon^{(R)}$), in order to prevent the ingrowth of upper soft tissue into the gap between bone and implant, and to maintain each implant to be positioned in the center of the drilled hole. 9 implants with different diameters were inserted in 3 dogs for histologic observation, and 12 implants were inserted in 2 dogs for mobility test and removal torque test. Fluorescent dyes were injected for the observation of new bone formation in order of $Terramycin^{(R)}$, Arizarin $Red^{(R)}$, and $Calcein^{(R)}$ at an interval of 2 weeks. 3 dogs were sacrificed for histologic observation at 4, 8, and 12-week after placement. Light microscopy and confocal laser scanning microscopy were used to qualitatively characterize the bone around HA-coated implant. 2 dogs were sacrificed for mobility test($Periotest^{(R)}$, Simens AG, Bensheim, Germany) and removal torque test($Autograph^{(R)}$ AGS-1000D series, Japan) at 8 and 12-week after placement The results were as follows: 1. Histologic observation showed that osseointegration occurred to both control and experimental groups as time lapse, but delayed bone healing was revealed in 3.8mm group (experimental 1group), compared to contrtol group and 5.0mm group (experimental 2group). 2. The mobility test showed that the experimental groups had no distinguishable movement during experimental periods of 8 and 12-week, and there was no difference in mobility depending on the gap between bone and implant, and time lapse. 3. The removal torque forces were increased depended on the gaps decreasing between bone and implant, and time lapse. The results suggest that HA-coated implant without primary bone contact, based on guided bone regeneration could obtain its stability in all experimental groups as time lapse, but bone healing was delayed in experimental group of 3.8mm. And the results suggested that studies on correlationship between mobility test and removal torque test for implant stability would be necessary.
고등학교 유도선수의 내적동기와 자기관리 및 운동지속의 구조적 관계
조형수(Cho, Hyung-Soo),김학권(Kim, Hark-Kwon),윤상영(Yoon, Sang-Young) 한국사회체육학회 2017 한국사회체육학회지 Vol.0 No.68
This study is aimed to provide academic rationales in developing training programs of high school Judo players using the systematic relations to intrinsic motivation, self-management and exercise adherence of high school Judo players. The subjects of the study were 290 high school male and female Judo players who participated in the 9th Chungpoonggi national Judo Contest from June 13th to 17th, 2016. Stratified Cluster Random Sampling Method was used in the study. Excluding inappropriate questionnaires for the research materials, 230 samples were used for the final analysis. The questionnaire was the research method. The reliabilities were .935 in intrinsic motivation, .906 in self-management and .915in exercise adherence. The conclusions are as follows: 1. The intrinsic motivation of high school Judo players has positive influence on self-management. 2 . The intrinsic motivation of high school Judo players has positive influence on exercise adherence. 3. The self-management of high school Judo players has positive influence on exercise adherence.
김호균(Ho Gyun Kim),조형수(Hyung Soo Cho) 한국품질경영학회 2002 품질경영학회지 Vol.30 No.3
This paper studies an economic manufacturing quantity (EMQ) model with two types of failures and planned preventive maintenance of the production facility. One is a type I (major) failure which should be corrected by a failure maintenance and the other is a type Ⅱ (minor) failure which can be minimally repaired without interrupting the production run. The objective is to determine the lot size and preventive replacement policy minimizing the long-run expected cost per unit time. We consider a control policy with a constant production lot size and preventive maintenance after completing n production runs. It is assumed that both preventive and failure maintenance times are random and the demand arriving during a stock-out period is lost. An expression for the expected cost per unit time is obtained in the general case. A special case is discussed and numerical results are provided.
기혼여성의 골프참여자와 운동몰입경험 및 가정생활만족의 관계
김학권(Kim Hak-Kwon),조형수(Cho Hyung-Soo) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4
The purpose of this study to examine closely between the golf participation of married women and exercise flow experience, household life satisfaction. To get the best result of this study, this was to select a popular of married women, who they hold a membership in golf drive ranges located at Seoul and Kyung-ki Province. The number of 320 were sampled among the population selected about end, and the final number of the population was 303. Tool for data collection is <Questionnaire for the relationships the golf participation of married women and excercise flow experience, household life satisfaction>, and the result of reliance shows excercise flow experience α=.730, household satisfaction α=.7104~.8394. The analysis used in this study for the data analysis is through t-test, one-way ANOVA analysis Based upon the purpose of this study and research method, the final conclusion were warranted as below: Firstly, there is significant relationship socio-demographic characteristics(i.e. age, job, income level, family construction, houshold labor time, family shape) between excercise flow experience, Secondly, there is significant relationship socio-demographic characteristics(i.e. age, job, income level, family construction, houshold labor time, family shape) between household life satisfaction.