• 한국직업건강간호학회지
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• 제15권2호
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• pp.126-132
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• 2006

Purpose: This study was done to evaluate the program for smoking cessation of workers in small workplace. Method: The study cases were seventy workers who voluntarily participated in the above program and they were from small workplace (under fifty employees) at Yonugdeungpo-gu, Seoul. This program was composed of individual health education and distributing guide books and video. Nurses visited the workplace for the program once two weeks. Result: Nine works (12.9%) succeed and 10 worker(14.3%) failed in smoking cessation. Number of cigarettes smoked a day and level of nicotine dependency of fifty-one(72.9%) workers decreased significantly. Conclusion: The results indicated the program was successful for workers at small workplace. The continual management by nurses' regular visit was the moat important thing for successful program.

• Journal of Ginseng Research
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• 제26권1호
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• pp.10-16
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• 2002

In replicated field trials, the efficacy of pentachloronitrobenzene (PCNB; quintozene) for control of damping-off of ginseng seedlings was found to be affected by timing of application and formulation. Application at the time of seeding and prior to placement of straw mulch was found to provide the moat consistent level of disease control. However, decline in plant stand during the four-year production cycle resulted in most treatments providing similar levels of plant populations at harvest. Soil residues of pentachloronitrobenzene were generally highest (1 $\mu\textrm{g}$ PCNB/g soil) in those treatments that exhibited the highest levels of disease control in the seedling year. Straw contained high levels of quintozene after application. Beet seed assays with artificially-infested soils indicated that current use rates provide an amount of product suitable for high levels of disease control.

• Earthquakes and Structures
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• 제2권1호
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• pp.1-24
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• 2011

During very strong earthquakes, seismically isolated buildings may experience large horizontal relative displacements, which may lead to poundings if an insufficiently wide clearance is provided around the building. This paper investigates, through numerical simulations, the effectiveness of using rubber bumpers, which could be attached at locations where it is likely to have impacts, in order to act as shock-absorbers. For the simulation of the dynamic behavior of such rubber bumpers during impacts, a nonlinear force-based impact model, which takes into account the finite thickness of the rubber bumpers, has been developed. Subsequently, a series of parametric analyses are performed to assess the effect of the gap size, the earthquake characteristics and the thickness, compressive capacity and damping of the bumpers. The stiffness of the moat wall is also parametrically considered during poundings of a seismically isolated building, as another potential mitigation measure for poundings of seismically isolated buildings.

• 한국전통조경학회지
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• 제28권4호
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• pp.105-111
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• 2010

본 연구는 앞으로의 조경계획 및 디자인을 개선하기 위해 서안명성곽공원의 시각적 선호 이미지 요인과 성곽과 해자의 조화 정도를 파악하여 중국 도시공원 및 역사공원 설계 시 기초자료를 제시하는 것이 목적이다. 이 연구는 문헌 조사와 현장 조사를 통해 이루어졌다. 문헌조사는 서안명성곽 및 명성곽공원의 관련 자료들을 수집하였으며, 현장 조사는 현장관찰과 서안명성곽공원 이용에 관한 설문 조사를 통해 이루어졌다. 설문을 통해 얻어진 데이터는 사회 과학 통계 분석 프로그램(SPSS17.0 for Windows)을 이용하여 분석하였다. 설문을 통해 얻어진 데이터를 주성분 요인분석을 실시하여 3가지 요인이 추출됐다. 추출된 3가지 요인인 환경인자, 편리인자, 문화심미인자의 변수에 대해서 다중회귀분석을 실시하였다. 전체 만족도에 가장 큰 영향을 준 요인은 환경인자로 나타났다. 14가지 조경요소 중에 포장, 원림건축, 입구공간 등 3개 요소가 성곽과 조화정도에 큰 영향을 주고 있었고, 휴식공간, 수경, 포장 등 3개 요소가 해자와 조화정도에게 큰 영향을 주고 있으므로 나타났다.

• 한국정보통신학회논문지
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• 제16권1호
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• pp.127-132
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• 2012

본 논문에서는, 초고집적 MOSFET를 위한 향상된 얕은 트랜치 접합 격리에서 높은 임계전압을 위한 활성영역 부분의 제안된 구조의 가장자리 효과를 시뮬레이션 하였다. 얕은 접합 격리는 트랜지스터와 트랜지스터 사이에서 전기적 격리를 하기 때문에 쌍보형-모스 기술에서 중요한 공정 요소이다. 시뮬레이션 결과, 얕은 트랜치 접합 격리 구조가 수동적인 전기적 기능 일지라도, 소자의 크기가 감소됨에 따라서, 초대규모 집적회로 공정의 응용에서 제안된 얕은 트랜치 격리 구조에서 전기적 특성의 영향은 전위차, 전계와 포화 임계 전압에서 높게 나타났다.

• 한국시뮬레이션학회논문지
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• 제22권4호
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• pp.93-98
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• 2013

본 논문에서는, 초고집적과 초고내압 MOSFET를 위한 높은 임계전압에서 제안한 구조의 얕은 트랜치 접합 격리 구조에 대한 시뮬레이션 하였다. 열전자 스트레스와 열 손상의 유전 강화 전계의 물리적 기본 모델들은 주위 온도와 스트레스 바이어스의 넓은 범위에 걸친 집적화된 소자들에 있어서 분석하는 전기적의 목표인 TCAD 툴을 이용하였다. 시뮬레이션 결과, 얕은 트랜치 접합 격리 구조가 수동적인 전기적 기능 일지라도, 소자의 크기가 감소됨에 따라서, 초대규모 집적회로 공정의 응용에서 제안된 얕은 트랜치 격리 구조가 전기적 특성에서 전위차, 전계와 포화 임계 전압이 높게 나타났다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부 C
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• pp.723-725
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• 1998

STI CMP process are substituting gradually for LOCOS(Local Oxidation of Silicon) process to be available below sub-0.5um technology and to get planarized. The other hand, STI CMP process(especially STI CMP with RIE etch back process) has some kinds of defect like Nitride residue, Torn Oxide defect, etc. In this paper, we studied how to reduce Torn Oxide defects after STI CMP with RIE etch back process. Although Torn Oxide defects which occur on Oxide on Trench area is not deep and not sever, Torn oxide defects on Moat area is sometimes very deep and makes the yield loss. We did test on pattern wafers witch go through Trench process, APCVD process, and RIE etch back process by using an REC 472 polisher, IC1000/SUV A4 PAD and KOH base slurry to reduce the number of torn defects and to study what is the root causes of torn oxide defects.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 센서 박막재료 반도체 세라믹
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• pp.149-153
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• 2003

Chemical mechanical polishing (CMP) technology for global planarization of multi-level inter-connection structure has been widely studied for the next generation devices. CMP process has been paid attention to planarized pre-metal dielectric (PMD), inter-layer dielectric (ILD) interconnections. Expecially, shallow trench isolation (STI) used to CMP process on essential. Recently, the direct STI-CMP process without the conventional complex reverse moat etch process has established by using slurry additive with the high selectivity between $SiO_2$ and $Si_3N_4$ films for the purpose of process simplification and n-situ end point detection(EPD). However, STI-CMP process has various defects such as nitride residue, tom oxide and damage of silicon active region. To solve these problems, in this paper, we studied the planarization characteristics using a high selectivity slurry(HSS). As our experimental results, it was possible to achieve a global planarization and STI-CMP process could be dramatically simplified. Also we estimated the reliability through the repeated tests with the optimized process conditions in order to identify the reproducibility of HSS STI-CMP process.

• 한국의류학회지
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• 제26권1호
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• pp.144-151
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• 2002

The assessment of hand of the denim fabrics finished by enzymatic hydrolysis will be discussed in this study. The subjective hand and the preference of the denim fabrics finished by enzymatic hydrolysis were evaluated using the developed scale(Part I). The factors affecting consumer's taste for denim fabrics were analyzed by statistics using SAS program. Also, the enzymatic of hydrolysis on the properties of denim fabrics were evaluated by subjective hand measurements. The results are as follows; Regarding the surface properties and the weight, Tencel was evaluated to be the finest, the smoothest, the most flexible, the warmest, the most refined, the sleekest, the flossiest, the lightest the softest, and the thinnest among the four kinds of fabrics. The other fabrics in the order of cotton/Tencel, cotton, cotton/PP were evaluated to qualify the listed touches. Tencel was evaluated to be the loosest and the weakest among the four kinds of denim. Cotton was evaluated to have the driest touch. In addition, the fabrics were evaluated to be more elastic and less wrinkly in the order of Tencel > cotton > cotton/Tencel > cotton/ PP. For the hand preference, the fabrics were ranked in the order of Tencel, cotton, cotton/Tencel, cotton/PP, where tencel is the moat preferred. Cotton/Tencel and cotton/PP showed negative values in the hand and the color preference, meaning that the evaluators disliked their touches. Hand preference of enzyme hydrolyzed cotton/Tencel and cotton/PP denims do not seem to appeal to Korean people.

• 한국지진공학회논문집
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• 제22권2호
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• pp.45-54
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• 2018

The seismically isolated nuclear power plants shall be designed for design basis earthquake (DBE) and considered to ensure safety against beyond design basis earthquake (BDBE). In order to limit the excessive displacement of the seismic isolation system of the seismically isolated structure, the moat is installed at a certain distance from the upper mat supporting the superstructure. This certain distance is called clearance to stop (CS) and is calculated from the 90th percentile displacement of seismic isolation system subjected to BDBE. For design purposes, the CS can be obtained simply by multiplying the median displacement of the seismic isolation system against DBE by scale factor with a value of 3. The DBE and BDBE used in this study were generated by using 30 sets of artificial earthquakes corresponding to the nuclear standard design spectrum. In addition, latin hyper cube sampling was applied to generate 30 sets of artificial earthquakes corresponding to maximum - minimum spectra. For the DBE, the median displacement and the 99th percentile displacement of the seismic isolation system were calculated. For the BDBE, the suitability of the scale factor was assessed after calculating the 90th percentile displacement of the seismic isolation system.