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위험성 평가를 적용한 공정건물 화재보험료 절감방안-국내 모 전자회사 사례 중심으로-
정문조 ( Moon Jo Jung ),박해천 ( Hai Chun Park ) 조선대학교 공학기술연구원 2012 공학기술논문지 Vol.5 No.2
Fire insurance means a contract that insurer receive the fixed insurance premiums from insured person or an enterprise and compensate for their property damage caused by unexpected disasters. Fire insurance coverage for everyone is not obliged to join and level of guarantee can be changed by their will. Insensitivity towards safety that is prevalent in our society may grow if someone take out an insurance policy by subjective judgments. Therefore, this study verifies the correlation between electronics company`s fire accidents rate of each production building and election of their insurance coverage and suggest the reducing plan for insurance premiums.
Maximization of the power production in LNG cold energy recovery plant via genetic algorithm
정문,조은비,변헌수,강춘형 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.2
This paper presents an optimization model via genetic algorithm (GA) to maximize the power generation potential of a liquefied natural gas (LNG) cold energy recovery plant. LNG releases a large amount of cold energy during vaporization prior to transport for service, and this cold energy can be effectively utilized to generate power using a heat engine. We performed a thermodynamic analysis for a power generation system combining the organic rankine cycle (ORC) driven by LNG exergy and the direct expansion cycle. Both LNG and the working fluid in the combined ORC are light hydrocarbon mixtures, and their physical properties were estimated using the Peng-Robinson equation. We conducted a thorough investigation of the effects that the working fluid composition brought about on the thermal efficiency of the heat engine through an analysis using Aspen HYSYS interfaced with a GA-based Matlab solver. The results showed that optimization of the working fluid composition led to an increase of 58.4% in the performance of the combined ORC in terms of the net work.
정문조 ( Moon Cho Chung ) 한국하천호수학회 1968 생태와 환경 Vol.1 No.1
The author had studied on the pollution caused by industrial wastewater of Anyang Stream which is significant problem both of drink water and industrial water for Anyang City. The resulst obtained as follows: The amount of B.O.D., C.O.D., total alkalinity and hardness were more that those of clear water. NH₃-N, NO₃,-N, Cl, and PO₄ in the down part of the stream showed more than those in the upper part of the stream. The high water temperature which inflowed from the factories seems to be uncomfortable for aquatic fauna. The aquactic fauna in the upper part were 23 families and those in the down part were only 7 families.
鄭文照,황찬식 대한전자공학회 2003 電子工學會論文誌-TC (Telecommunications) Vol.40 No.12
In this paper we propose service schemes for the control message of voice and data connections served by a Softswitch in NGN (next generation networks). After that we propose a method of evaluating the performance of a Softswitch that provides a limited delay to voice connections. Via numerical experiments, we verify the implication of the proposition in the design of a Softswitch, which simultaneously incorporates voice and data services in the NGN framework. 본 논문에서는 NGN에서 차세대 멀티미디어 통신 서비스를 제공함에 있어서 다양한 유형의 서비스에 대한 연결제어를 담당하는 소프트스위치에 대하여 연결특성이 다른 두 가지 이상의 응용 서비스를 가정한 경우 연결형태별 호 처리를 위한 제어 메시지의 요구조건을 만족하는 서버를 설계하기 위한 호 처리 차별화 방안에 대한 몇 가지 대안들을 제안한다. 그리고 각 대안 별로 호 처리 모델의 성능분석을 통하여 제안된 호 처리 차별화 방안의 유효성을 입증하고자 한다.