• Journal of the Korean Society of Food Culture
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• v.10 no.1
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• pp.29-34
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• 1995

본 연구의 목적은 병원급식소의 세정작업의 효율적 관리를 위하여 위탁 전과 후의 비용효과를 비교하고 자가운영과 위탁운영체제의 세정담당 종업원들의 직무만족도를 비교하여 그 비용효율성을 분석하는데 있다. 본 연구의 결과에 의하면, 세정작업의 위탁관리로 다음과 같은 잇점을 기대할 수 있었다. 첫째, 호봉이 낮고 적은 수의 종업원 이용으로 인건비의 절감을 기대할 수 있었으며, 둘째, 봉급에 관한 항목을 제외한 다른 항목에 관해서는 자가운영과 위탁운영 체제의 세정담당 종업원들의 직무만족도에 유의적 차이가 없는 것으로 나타났으며, 세째, 작업일정이나 인사배치에 있어서의 용이함으로 나타났다. 이 연구 결과를 기초로 병원급식소의 위탁관리 프로그램에 관한 지속적인 평가와 개발에 관한 연구가 이루어져야 할 것이다.

• 수도
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• v.22 no.1 s.71
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• pp.95-107
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• 1995

• Journal of the Korean Vacuum Society
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• v.16 no.5
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• pp.383-387
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• 2007

In this paper the design of the discharge cleaning system for KSTAR vacuum vessel is described. We first discuss about the parameters which are related the efficiency of discharge cleaning. The RG(RF-assisted Glow) discharge which has the ignition and sustain pressure lower than those in the case of DC discharge, thus has the higher efficiency of discharge cleaning. So we adopt the RG discharge, in practical design, for KSTAR discharge cleaning system. For uniformity of the cleaning effect, we plan to install two discharge cleaning systems in A- and I-port of the KSTAR vacuum vessel. The designed system will be adapted for the study of the fuel recycling and of the boronization as well as the discharge cleaning of the KSTAR vacuum vessel.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.64-65
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• 2015

본 연구는 PM과 SOx를 효과적으로 저감 시킬 수 있는 Water- Scrubber와 오염물과 세정수의 분리가 가능한 Purifier를 이용한 새로운 순환식 배기가스 세정시스템의 개발하여 PM, PAH 제거효율을 산정한 결과, PM과 PAH모두 유입 수 대비 99%이상 처리되는 것을 확인하였으며, 수질인자도 재사용이 가능한 유입수의 수준으로 분석되었다.

• Clean Technology
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• v.3 no.2
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• pp.57-73
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• 1997

Metal cleaning process is a technology which removes oil, dust and soil etc. on the surface of metal utilizing cleaning agents. These contaminants disturb the following processes such as plating and painting etc. if they are not removed. Thus, metal cleaning is typically an environmentally hazardous activity. Until recently, vapor degreasers as utilizing chlorinated solvents have been relatively cheap, extraordinarily versatile and waste disposal costs have been perceived as insignificant. Today, however, it is readily apparent that Industry's reliance upon chlorinated solvents as metal cleaners have resulted in a myriad of environmental, health and safety concerns. Therefore, this paper studies on a parameter and a sort of the alternative cleaning agents for the optimum cleaners. Also, a great deal of effort has been devoted to developing alternative metal cleaning technologies in advanced countries and some processes are being commercialized among them. We are going to consider alternative aqueous cleaning agents replacing organic chlorinated solvents and to pursue a domain application through a successful improvement case.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.41 no.1
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• pp.29-36
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• 2017

The paper presents a basic investigation for the development of cleaning technology employing an annular nozzle ejector for application to cleaning water supply and air bubble generation. The quantitative flow characteristics of the primary and suction flows, the qualitative visualization behavior of the mixed jet, and the percentage concentration of pesticide residual at different values of the ejector screw pitch were investigated. It was seen that the primary flow rate increased, while the mass ratio decreased with increase in screw pitch. Further, the mixed jet behaved like a buoyancy jet or horizontal bubbly jet, and the residual concentration of pesticide first decreased and then increased with increase in screw pitch.

• Journal of Animal Environmental Science
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• v.15 no.3
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• pp.225-230
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• 2009

The purpose of this study was to determine the effect of re-establish the amount and major pollution source of swine wastewater from swine farms. The results obtained in this study was summarized as follow; The quantity of wastewater produced from the average volume of swine wastewater was $2.49{\ell}$/head/day and $2.49{\ell}$ in spring, $2.65{\ell}$ in summer, $2.47{\ell}$ in autumn, and $2.35{\ell}$ in winter. The quantity of wastewater production during summer season was higher than of the other seasons. The water pollutant concentration in wastewater of swine farms, $BOD_5$, SS, T-N and T-P, was $4,689\;mg/{\ell}$, $2,122\;mg/{\ell}$, $3,238\;mg/{\ell}$ and $118\;mg/{\ell}$, respectively.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.8
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• pp.195-201
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• 2014

In this paper, we developed a LGP(Light Guide Panel) dry cleaning system for particle cleaning using corona discharge and dry adhesive roll. Therefore, we design a cleaning mechanism that can be applied dry adhesive dust removal roll and ESD(electrostatic discharge) by using corona discharge. Also, we design and implementation of equipment, which can loading, unloading and transfer LGP automatically. The developed equipment is dust and particle cleaning experimental results to demonstrate its stability.

• Proceedings of the Membrane Society of Korea Conference
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• 1999.04b
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• pp.13-24
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• 1999

폐수 재활용방법은 반도체업계나 도금, 기타 산업에서 주로 2차 세정수를 회수하여 저급수로 직접 사용하는 방법 또는 간단한 전처리를 거쳐 원수에 혼합하여 정수처리하는 RECLAM SYSTEM과 1차 세정폐수를 분리하여 전처리와 RO 등을 거쳐 용수로써 재활용하는 PROCESS RECYCLE SYSTEM, 종합 폐수처리 후 방류수를 재활용하는 방류수 재활용설비로 구분할 수 있다. 막분리를 사용한 폐수 재활용기술에서는 방류수 재활용(종합폐수 재활용)와 원폐수 재활용(성상변 분리 재활용)만을 다루고져 한다.

• The Journal of Korean Academy of Prosthodontics
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• v.49 no.2
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• pp.138-144
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• 2011

Purpose: The purpose of this study was to evaluate the cleansing effect of recently developed alkaline ionized water, e-WASH, on microorganisms of the denture surface. Materials and methods: Removable partial and complete dentures were randomly assigned to the experimental group of 41 dentures, and the control group of 26. The denture was immersed in the e-WASH solution (experimental group), or tap water (control group) for 5 minutes. The plaque was collected from the denture surface before and after immersion, and smeared on the slide glass. Amount and motility of microorganisms were compared according to the morphology and strain of microorganisms, using the phase contrast microscope. Statistical analysis was accomplished with paired t-test and independent t-test at 95% confidence level (P<.05). Results: 1. The amount of cocci, bacilli, filamentous, spiral/comma, and the motility of bacilli, filamentous, and spiral/comma were decreased after denture cleansing with the alkaline ionized water, e-WASH (P<.05). But in the control group, only the amount of cocci showed a significant difference (P<.05), but no difference from the others. There were no differences in other analysis. 2. In the experimental group, the amount of cocci, bacilli, filamentous, spiral/comma, and the motility of bacilli, filamentous, and spiral/comma were smaller and more inactive compared to the control group (P<.05). Conclusion: These results indicated that the alkaline ionized water, e-WASH could effectively reduce the amount and motility of the experimented microorganisms on the denture surface, and that e-WASH could be recommended as an effective denture cleanser.