• 대한영양사협회학술지
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• 제21권3호
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• pp.215-226
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• 2015

The prevalence of obesity is increasing worldwide and has become a serious epidemic health problem. We developed the 'Change 10 Habits' educational program based on obesity treatment and dietary guidelines and examined its effects on customized nutrition education in mildly obese adults. The study was approved by the Institutional Review Board. Study subjects were excluded if they had several major diseases, if had consumed an anti-obesity drug, or if they practiced an obesity-related program within 30 days. The subjects (n=87, $25{\leq}BMI$ <30) were each exposed to the customized nutrition education program with four lessons according to the stage of the transtheoretical model (TTM). The stage-matched program was administered for 12 weeks and was run by a clinical dietitian. Overall, subjects who were in the precontemplation/contemplation stage at baseline made progress in the preparation and action/maintenance stage after 12 weeks (P<0.05). For 'Alcohol is consumed, up to 2 drinks per day', the proportion of subjects who belonged in the action/maintenance stage increased from 34.5% to 49.4% at 12 weeks. In addition, scores of all items significantly increased after the program (P<0.05). 'Chew more than 10 times and eat slowly' score significantly increased from $3.9{\pm}2.4$ to $5.8{\pm}2.3$ (P<0.05). In conclusion, behavioral stage-matched nutrition education using the 'Change 10 Habits' program was effective in improving eating behaviors and enhancing healthy lifestyles in mildly obese adults.

• 성인간호학회지
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• 제14권1호
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• pp.83-92
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• 2002

Purpose: This study was performed to identify the process of change, decisional balance and self-efficacy corresponding to the stage of exercise behavior using Transtheoretical Model in patients with type 2 diabetes mellitus. Method: The study method was a survey in 100 type 2 DM patients at out-patients clinic of Y medical center from March 19, 2000 to October 30, 2000. Result: The results were as follows: The subjects were divided into five stages of exercise behavior ; 15.0% in pre-contemplation stage, 33.0% in contemplation stage, 17.0% in preparation stage, 16.0% in action stage and 19.0% in maintenance stage. The subjects in pre-contemplation stage used all processes of change in the least. "Dramatic relief(DR)", "Environmental reevaluation(ER)" and "Self reevaluation(SR)" were identified as main processes of change in contemplation stage. "Consciousness raising(CR)", "DR" were used higher than average in preparation stage. Helping relationships(HR)", "CR", "ER", "SR", "Social liberation(SL)", "Counter conditioning (CC)", "Reinforcement management(RM)", "Self iberation(SEL)" and "Stimulus control(SC)" were used higher than average in action stage. The subjects in maintenance stage used all process of change the highest except "DR"and "HR". "Cons" score of decisional balance was the highest in pre-contemplation stage, "Pros" score was the highest in action stage and "Self-efficacy" score was the highest in maintenance stage. Conclusion: This study can provide the basis of staged matching exercise program using TTM for more effective and useful intervention.

• 한국정밀공학회지
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• 제26권7호
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• pp.44-50
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• 2009

High-pressured jetting is now widely used in the advanced cutting processes of polymers, metals, glass, ceramics and composite materials because of some advantages such as heatless and non-contacting cutting. Similarly to the focused laser beam machining, it is well known as a type of high-density energy processes. High-pressured jetting is going to be developed not only to minimize the cutting line width but also to achieve the short cutting time as soon as possible. However, the interaction behavior between a work piece and high-velocity abrasive particles during the high-pressured jet cutting makes the impact mechanism even more complicated. Conventional high-pressured jetting is still difficult to apply to precision cutting of micro-scaled thin work piece such as thin metal sheets, thin ceramic substrates, thin glass plates and TMM (Thin multi-layered materials). In this paper, we proposed the advanced high-pressured jetting technology by introducing a new abrasives supplying method and investigated the optimal process conditions of the cutting pressure, the cutting velocity and SOD (Standoff distance).

• 성인간호학회지
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• 제15권3호
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• pp.483-492
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• 2003

Purpose: The study was performed to identify the process of change, decisional balance and self-efficacy corresponding to the stage of smoking cessation behavior based on Transtheoretical Model in industrial workers. Method: A convenience sample of 146 industrial workers except for the never smokers, were recruited at a H industry in Ulsan. Data were collected from February 1 to 28, 2002. The research instruments were Stages of Change of Smoking Cessation Measure(DiClemente et al, 1991), Process of change(Prochaska, 1988), Smoking Abstinence Self Efficacy (SASE: DiClemente et al, 1985) and Decisional balance(SDB; Kim, 1999). Result: The results of this study were as follows; 1. The subjects were distributed in each stage of smoking cessation change: There were 64 subjects (43.0%) in the precontemplation stage, 35 subjects(23.5%) in the contemplation stage, 28 subjects(18.8%) in the preparation stage, 14 subjects(10.1%) in the action stage and 7 subjects(4.7%) in the maintenance stage. 2. Analysis of variance showed that experiental process(F=2.808, p=.042), behavioral process (F=4.567, p=.004) self-efficacy(F=9.809, p=.000), pros(F=11.107, p=.000), cons(F=6.686, p=.000), pros- cons(F=3.446, p=.018) were significantly associated with the stages of smoking cessation change. 3. Through discriminant analysis, it was found that 'PROS' was the most influential variable in discriminating the four stages of change. Conclusion: This study can provide the basis of staged matching smoking cessation program using TTM for more effective and useful intervention.

• 대한전기학회논문지:전력기술부문A
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• 제48권10호
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• pp.1317-1326
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• 1999

As the integration ratio and operation speed increase, it has become an important problem to estimate the dissipated power during the design procedure as a method to reduce the TTM(time to market). This paper proposed a prediction model to estimate the maximum dissipated power of a CMOS logic gate. This model uses a calculational method. It was formed by including the characteristics of MOSFETs of which a CMOS gate consists, the operational characteristics of the gate, and the characteristics of the input signals. As the modeling process, a maximum power estimation model for CMOS inverter was formed first, and then a conversion model to convert a multiple input CMOS gate into a corresponding CMOS inverter was proposed. Finally, the power model for inverter was applied to the converted result so that the model could be applied to a general CMOS gate. For experiment, several CMOS gates were designed in layout level by $0.6{\mu}m$ layout design rule. The result by comparing the calculated results with those from HSPICE simulations for the gates showed that the gate conversion model has within 5% of the relative error rate to the SPICE and the maximum power estimation model has within 10% of the relative error rate. Thus, the proposed models have sufficient accuracies. Also in calculation time, the proposed models was more than 30 times faster than SPICE simulation. Consequently, it can be said that the proposed model could be used efficiently to estimate the maximum dissipated power of a CMOS logic gate during the design procedure.

• International Journal of Precision Engineering and Manufacturing
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• 제6권1호
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• pp.51-58
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• 2005

The development of the high-efficiency machine-tools equipment and new cutting tool materials with high hardness, heat- and wear-resistance has opened the way to application of high-speed cutting process. The basic argument of using of high-speed cutting processes is the reduction of time and the respective increase of machining productivity. In this sense, the spindle units may be regarded as one of the most important units, directly affecting many parameters of high-speed machining efficiency. One of the possible types of spindle units for high-speed cutting is the air-bearing type. In this paper, we propose the mathematical model of the dynamic behavior of the air-bearing spindle. To provide the high-level of speed capacity and spindle rotation accuracy we need the adequate model of "spindle-bearings" system. This model should consider characteristics of the interactions between system components and environment. To find the working characteristics of spindle unit we should derive the equations of spindle axis movement under the affecting factors, and solve these equations together with equations which describe the behavior of lubricant layer in bearing (bearing stiffness equations). In this paper, the three influence coefficients are introduced, which describe the center of spindle mass displacement, angle of shaft rotation around the axes under the unit force application and that under the unit torque application. These coefficients are operated in the system of differential equations, which describes the spindle axis spatial movement. This system is solved by Runge-Kutta method. Obtained trajectories and amplitude-frequency characteristics were then compared to experimental ones. The analysis shows good agreement between theoretical and experimental results, which confirms that the proposed model of air-bearing spindle is correctis correct

• 지역사회간호학회지
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• 제15권1호
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• pp.110-121
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• 2004

Purpose: This study was performed to identify factors associated with drinking behavior using Transtheoretical Model in workers. Method: The study method was a survey of 216 marine shipping metal workers in Koje city from November 11, 2002 to November 30, 2002. Result: The subjects were divided in four stages of drinking behavior: 38.9% in pre contemplation stage, 38.6% in contemplation stage, 17.6% in preparation stage and 7.9% in action & maintenance stage. The amount of drinking was significantly decreased as the workers progressed through each stage. Helping relationships(HR) and Self reevaluation(SR) were identified as the main processes of change in all stages. Self liberation(SEL), Counter conditioning(CC), Helping relationships(HR), Self reevaluation(SR), Dramatic relief (DR) and Social liberation(SL) were used higher than average. The self efficacy score increased as the workers progressed through each stage, but not significantly. The Pros score of decisional balance was the highest in the pre contemplation stage and decreased as the workers progressed through each stage. but not significantly. The Cons score of decisional balance was the highest in the preparation stage, but not significantly in as the workers progressed through each stage. Conclusion: This study can provide the basis of a staged matching alcohol reducing program using TTM for more effective and useful intervention.

• 대한간호학회지
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• 제34권2호
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• pp.362-371
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• 2004

Purpose: The study was performed to identify the process of change, decisional balance and self-efficacy corresponding to the stage of exercise behavior change based on a Transtheoretical Model in middle aged women. Method: The subjects consisted of 317 women by convenience sampling residing in city B. The collected data were analyzed using one-way ANOVA, Scheffe test, and Discriminant analysis by SPSS/WIN program. Result: The subjects were distributed in each stage of change of exercise behaviors: 53 subjects (16.7%) in the precontemplation stage, 86 subjects (27.1%) in the contemplation stage, 88 subjects (27.8%) in the preparation stage, 51 subjects (16.1%) in the action stage and 39 subjects(12.3%) in the maintenance stage. Analysis of variance showed that consciousness raising (F=24.96, p=.00), environmental reevaluation (F=7.l3, p=.00), self reevaluation (F=19.47, p=.00), dramatic relief (F=15.22, p=.00), social liberation (F=4.26, p=.00), counter conditioning (F=26.44, p=.00), a helping relationship (F=13.l7, p=.00), reinforcement management (F=21.25, p=.00), self liberation (F=27.70, p=.00), stimulus control (F=13.49, p=.00), pros (F=14.40, p=.00) and self-efficacy (F=39.9l, p=.00) were significantly associated with the stages of change of exercise behaviors. Through discriminant analysis, it was found that ‘stimulus control’ was the most influential variable in discriminating the five stages of change. Conclusion: This study can provide the basis of a staged matching exercise program using TTM for more effective and useful intervention.

• 한국진공학회:학술대회논문집
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• 한국진공학회 1998년도 제14회 학술발표회 논문개요집
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• pp.109-109
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• 1998

최근 들어 MOCVD 법으로 성장시킨 GaN, InGaN, AIGaN를 이용한 광소자 ( (LED, LD)와 전자소자(FET, MODFET)에 대한 관심이 고조되면서, MOCVD 법 을 이용한 GaN 중심의 질화물 반도체 성장에 관심이 집중되고 있다. 금번 실험에 사용된 MOCVD 장비는 수직형 MOCVD 장비이다. 특히, wafer c carner를 1$\alpha$)() rpm이상의 고속으로 회전시킬 수 있는 장치로서 원료 가스의 반웅 기 내에서의 흐름을 균일하게 하여 uniformity가 높은 질화물 반도체를 성장시킬 수 있다 .. GaN 에피충은 c-plane 사파이어를 기판으로 하여 11 00 "C 이상의 고온 에서 수소를 이용하여 기판을 cleaning하고, 500 "C 부근에서 핵생성충올 성장시 킨 후 1050 "C에서 trimethylgallium(TMGa)과 NI-h를 이용하여 성장시켰다. n n -GaN를 성장시키기 위해서는 SiH4을 사용하였으며, InGaN의 경우는 t trimethylindium(TMIn)을 In원 료 가스로 하여 635 - 725 "C 범 위 에 서 성 장시 켰 다. 성 장된 undoped GaN, n-GaN, InGaN는 X -ray di잔raction(XRD), H떠l m measurement, Photoluminescence(PU동올 이용하여 결정성과 전기적 및 광학적 특성올 고찰하였다 .. 2ttm 두께로 성장된 undoped G값V박막의 경우 Hall 측정결과 6 6 X lOI6/e며 정도의 낮은 도핑 농도를 보였으며, V!lII ratio(2500 - 5000)증가에 따라 결정성이 향상됨을 GaN (102)면의 X -ray e -rocking분석올 통하여 확인하 였다 .. n-GaN의 경우 SiH4양올 3 - 13 sccm으로 증가시킴에 따라 n -type 도명농 도가 선형적으로 증가하였고, 1017/c며 범위 내로 도평이 된 경우 상온에서 300 e마 N Ns 이상의 high mobility를 얻올 수 있었다 .. PL 관측 결과로부터 Si 도핑으로 인 하여 GaN bandedge emission이 강화됨을 알 수 있었다 .. InGaN 박막의 경우 성 장온도를 낮춤에 따라서 m의 양을 증가시킬 수 있었다. 또한 유량비(TMIn I T TMGa)가 1에 가까운 경 우에서도 온도를 635 "C 정도로 낮훈 경우 410 nm정도에 서 PL bandedge peak올 얻을 수 있었으며, 이 때의 반치폭은 50 meV정도의 낮 은 값을 보였다. 반치폭은 50 meV정도의 낮 은 값을 보였다.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2010년도 춘계학술발표논문집 2부
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• pp.610-613
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• 2010

본 과제를 통하여 기술적으로는 로봇 개발에 있어 기존 기술을 최대한 활용하고 새로운 기능을 추가하는 형태로 발전해 갈 수 있도록, 각 요소별 기능을 표준화 모듈화 하여 새로운 제품의 개발이 손쉽게 이루어 질 수 있는 기본 platform으로의 역할이 가능해졌다. 구동부 제작 및 설계, 금형 비용 등을 절감하기 위한 다목적 완구로봇 플랫폼을 확보할 수 있었다. 로봇이 복잡한 환경을 인식하고, 자율적으로 작업을 수행하며, 예측하지 못한 문제에 적절한 대처를 할 수 있도록 하기 위한 핵심 기술을 제공하게 될 것으로 생각된다. 로봇 개발에 있어 전문지식이 없는 초보자들이 직접 제작 구동해 볼 수 있는 비주얼한 개발환경을 지원할 뿐만 아니라 GUI 개발환경 및 TEXT Programming 으로 상호 전환이 가능한 코딩 방법을 지원(MSRS와의 차별화를 시도하였다. 기존 하드웨어 지식과 소프트웨어지식이 없는 상태에서도 제작자의 창의력에 따라 다양한 형태의 로봇을 제작 적용이 용의 하며 초보자들에 대한 로봇개발에 흥미를 유발할 수 있도록 하였다. 고급사용자를 위한 별도의 다운로딩 포트를 제공하였다. 로봇공학의 기본지식을 습득(아날로그/디지털 회로를 이해하고, 각종 센서의 이해하며, 스템/서보/DC모터의 제어기술, 펌웨어개발능력, 기본수준의 소프트웨어개발 능력) 활용할 수 있다. 또한, 경제 및 산업적 측면으로는 다음과 같은 장점이 있다. 기존 기술들의 장점을 취합하여 추가적인 기술을 적용할 수 있는 Base형태의 로봇을 개발할 경우 이를 활용한 제품 개발 및 Base자체로도 충분한 시장을 형성 할 수 있을 것으로 기대된다. 인터넷기반 로봇 제어 기술의 확보로 로봇시스템의 생산비용을 낮추고 TTM (Time-to-Market) 제약을 해결시켜 준다. 다른 응용 시스템에 쉽게 적용이 가능하고 지식기반 로봇 서비스의 요소기술 개발은 멀티미디어 콘텐츠분야(교육/게임/오락 등)의 활성화가 가능하기 때문에 타 IT산업에의 파급효과가 예상된다. B2B를 통한 실질적인 판매를 통한 동종기업의 연구 개발비 및 개발 기간의 단축이 예상된다.