• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1049-1050
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• 2007

In this paper, an electromagnet which is used in maglev(magnetic levitation) clean lift is designed and described. The electromagnet is firstly designed by using FEM(finite element method) tool and the simulation results are presented. The nominal airgap is 5mm and the nominal current is 2A. Also, the nominal magnetic force is 200N. From the results, we can get the electromagnet as an actuator used in maglev(magnetic levitation) clean lift for LCD process.

• 한국식품저장유통학회지
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• 제15권5호
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• pp.731-735
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• 2008

본 연구는 벌꿀의 내포되어 있을 수 있는 미생물의 포자의 제균에 관한 연구로 선행연구로 일반세균, 대장균군, 살모넬라균, 포도상구균을 분석하였으며, 벌꿀 음료 제조 후 유통 중에 문제시 되어지고 있는 내열호산성균의 제균에 관한 연구결과이다. 분석을 위한 내열호산성균 실험법은 진공감압기를 이용하여 $0.45\;{\mu}m$ micro filter를 이용한 막분리 배양법을 이용하였다. 미생물 실험 결과 일반세균, 대장균군, 살모넬라균, 포도상구균은 모두 음성으로 나타났으며, 내열호산성균 제균을 위하여 식품의 일반 살균법을 적용한 결과 농도별 전해수 살균, 오존수 살균, 자외선살균, 일반 마이크로 필터 처리, 고온 가열 살균, microwave 살균 등 모든 제균 방법에서 균이 제어 되지 않는 것으로나타났다. 또한 마이크로 필터를 이용한 제균 처리에서도 일반 (nominal type) 필터를 사용하였을 경우 $44.8{\sim}64.5%$ 제균 효과를 나타낸 반면 absolute type의 필터를 사용하였을 경우 0.45, $0.8\;{\mu}m$ 마이크로 필터의 사용 시 모든 처리구에서 음성으로 나타나 제균 효과가 다른 살균법에 비해우수한 것으로 나타났다.

• 품질경영학회지
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• 제29권2호
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• pp.104-119
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• 2001

Brainstorming is one of the most well-known and frequently-used creativity techniques. Although the original brainstorming has several merits, it also has some drawbacks in its applications. Thus, lots of its variants have been introduced. Reverse Brainstorming, Cordon Method, Phillips 66, Brainwriting, 6-3-5 Brainwriting, Crawford Slip Writing, Nominal Group Technique, KJ Method are some examples. These techniques are classified into some categories, and their main characteristics are examined in this paper. Guidelines for applying the techniques are also provided.

• 플랜트 저널
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• 제10권2호
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• pp.48-59
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• 2014

본 연구에서는 고온 고압 배관용 단조밸브 용접부의 품질확보를 위하여 단조밸브 제작현장에서 활용할 용접후열처리의 유지시간 및 유지온도를 연구했다. ASTM A182 F92 재료를 단조밸브의 용접부에 해당되는 밸브 끝단부 및 누설방지용접부와 동일한 형상의 두께 1 inch 쿠폰으로 가공하고, 쿠폰을 가스 텅스텐 아크용접(GTAW: Gas Tungsten Arc Welding) 방법으로 완전용입 용접하여 시편을 제작했다. 용접부 호칭두께가 1 inch인 시편을 $705^{\circ}C$, $735^{\circ}C$, $750^{\circ}C$, $765^{\circ}C$, $795^{\circ}C$ 및 $825^{\circ}C$에서 1시간 유지하여 용접후열처리를 실시(Group 1)하였다. 그리고 용접부 호칭두께가 1 inch인 시편 3개를 $735^{\circ}C$에서 30분, 1시간 및 2시간으로 달리 유지(Group 2)하여 용접후열처리를 실시하였다. 다른 유지시간과 유지온도에 따른 경도의 변화를 관찰하기 위하여 모재부, 열영향부 및 용착금속부에서 경도를 측정하였다. 본 실험의 결과에 따라, 1 inch당 1시간 온도를 유지할 경우는 용접후열처리가 $750^{\circ}C{\sim}765^{\circ}C$에서 수행되어야 바람직한 것으로 확인되었다. 단조밸브 제작규격에서 요구하는 최소 유지온도 보다 $5^{\circ}C$가 높은 $735^{\circ}C$에서 1 inch당 1시간 유지할 경우에 요구된 경도 값을 만족하지 못하여, 요건보다 긴 시간인 1 inch당 2시간 용접후열처리 시 경도 값을 만족하는 것으로 확인되었다. 또한 용착금속부의 조직은 템퍼드-마르텐사이트 조직으로 확인되었다.

• 가정∙방문간호학회지
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• 제19권2호
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• pp.173-182
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• 2012

The purpose of this study is to identify the appropriateness and validity of the HIV/AIDS nurse counselor's job, and to propose the job description. Mixed method was used: nominal group interview was used as a qualitative research and a survey was used as a quantitative research. Three of the nominal group members evaluated the appropriateness of the duties and tasks. To identify the validity of the evaluated duties and tasks, importance, difficulty and frequency were surveyed by 14 nurses who were working at the hospital as a HIV/AIDS nurse counselors. For the HIV/AIDS nurse counselor, 7 duties and 35 tasks - infection control of the HIV/AIDS, counseling, client advocacy, development of the educational material, referral to the resources, referral services at the hospital, and self-improvement - were identified. Proposed job description will be used as a reference for the role position and the training curriculum of the HIV/AIDS nurse counselors who are working at the hospital.

• 한국강구조학회 논문집
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• 제15권6호통권67호
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• pp.649-660
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• 2003

본 논문은 비균열 무근콘크리트에 매입된 익스팬션 앵커의 인발내력을 평가하기 위한 실험적 연구이다. 앵커의 인발실험은 익스 팬션 앵커에 해당하는 고하중 앵커와 웨지 앵커를 대상으로 대상으로 삽입깊이, 콘크리트 강도 및 연단거리을 변수로 하여 실험을 수행하였다. 후시공 앵커의 설계식은 EOTA와 ACI 318-02 규준의 근거가 되는 CCD 방법이 제안되어 있다. 본 연구에서는 비균열 무근콘트리트에 매입된 익스팬션 앵커의 콘크리트 콘 파괴강도에 관한 설계식을 분석하였으며, 고하중 앵커와 웨지 앵커의 실험값을 CCD 방법의 예측값과 비교 평가하였다. 실험 결과, 비균열 무근콘크리트에 매입된 웨지 앵커의 콘크리트 콘 파괴 시 공칭강도의 계수는 CCD 방법에 근거하여 9.94임을 알 수 있었다. 고하중 앵커의 콘크리트 콘 파괴 시 공칭강도의 계수는 CCD 방법에 근거하여 11.50임을 알 수 있었다.

• 한국기계연구소 소보
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• 통권9호
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• pp.141-151
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• 1982

An iterative procedure for the calculation of the thick axisymmetric boundary layer and wake near the stern of a body of revolution is presented. Procedure consists of the potential flow calculation by a method of the integral equation of first kind and the calculation of boundary layer and wake by a differential me¬thod of the boundary layer theory. Additionally, higher order terms are included in the conventional momentum equations and continuity equation for the consider¬ation of the characteristics of axisymmetric flow different from the one of two dimentional flow and the thick boundary layer. These solutions are matched at the edge of boundary layer and wake. The results obtained by the present me¬thod are compared with the experimental data and it is found that the nominal wake distribution at the propeller plane of a axisymmetric body is in good agree¬ment with the experiment.

• 한국임상약학회지
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• 제17권1호
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• pp.19-32
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• 2007

Objectives : It is necessary to monitor consumption of drugs in order to enhance promote appropriate use of drugs. Defined Daily Dose(DDD) of World Health Organization(WHO) has been used for evaluating the amount of medicine use. However, DDD of some drugs must be determined for drugs in Korea which are not listed by WHO. Our formulary follows ourself classification and DDD of some drugs must be determined since they exist only in Korea. This study was aimed to determine DDD value using RAND Appropriateness Methods and evaluate the amount of antibiotics use using DDD value. Methods : J01 antibiotics of WHO anatomical therapeutic chemical(ATC) classification were extracted from drug formulary. Antibiotics list without DDD was identified to determine their DDD with comprehensive review of references and recommendation of experts. defined. Review of reference was executed. of Expert panels were comprised of clinical pharmacist and clinical doctors. Modified Delphi Method was applied by survey and consensus meeting. Amount of antibiotic use was calculated by DDD/1000 inhabitants/day in the national level using health insurance claim data. Results : The result of 1 round, DDD values of 28 ingredients were determined from the first round of consensus meeting. With 2nd round meeting, 3 ingredients were deleted and DDD of 17 ingredients were decided. Analysis of antibiotic use in health insurance claim data showed 22.97 DDD/1000 inhabitants/day in 2003 year. Conclusion : This study can contribute to the establishment of DDD assignment and thus quantifying drug uses.

• 한국수산과학회지
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• 제48권5호
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• pp.760-767
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• 2015

First annulus formation and age determination of otoliths were examined for chub mackerel Scomber japonicus collected in Korean waters over the one year from January to December in 2009. Translucent zone was regarded as an annual mark. Age interpretation criteria was based on the data of the number of translucent zone, capture date, and edge type of the otolith, assuming the nominal birthday to be 1 January. Monthly changes in mean marginal index indicated that translucent zone was formed once a year, mainly in June. The otolith of 0-ring group was detected comparing the progression by month of the smaller fish length, appearing to be a single first opaque zone. The average distance from the core to the first translucent zone was ~1.77 mm, provided as supplementary information to increase ageing accuracy. The ageing criteria for chub mackerel was made to determine correct year-class with the purpose of effective stock assessment. This method using nominal birthdate and edge type analysis could estimate age of fish closer to the true age than purely counting the number of translucent zone on a whole otolith.

• Toxicological Research
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• 제17권2호
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• pp.139-142
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• 2001

Sexual behavior and reproductivity of male fIsh were studied as an in vivo screening method of endocrine disruptors. Male medaka (Oryzias latipes) were exposed to 17$\beta$-estradiol at nominal concentrations of 2 and 20 $\mu\textrm{g}$/l for 14 days. After exposure of the chemical, sexual behavior between male medaka and normal female which were injected with prostaglandin $F_{2\alpha}$ just before the test, was analysed by using video camera for one hour. Normal control male showed courtship dancing such as following, guarding, dancing and crossing while 17$\beta$-estradiol treated male did not show any type oj courtship dancing. Furthermore, fecundity and fertility were significantly decreased in the treated group. It was suggested that analysis of sexual behavior could be a useful endpoint for the screening of the endocrine disruptors.