확률적 페트리네트 기반의 워크플로우 최적화 모델링

임경택,박세권,명광식,김도일 중앙대학교 산업경영연구소 2000 산업경영연구 Vol.9 No.1

워크플로우에서는 기업이 정한 목표를 달성하고, 기업의 현재의 불확실성과 불안정성을 제거하고, 현재의 치열한 경쟁을 극복하고, 장래에 보다 나은 기업이 되기 위해서, 기업의 모든 재 구성원과 자원들 사이에 존재하는 이질적 요소를 조정·조화시킨 후, 유기적으로 결합하여, 조직의 목적을 이루는 것이 중요하다. 본 논문은 크게 두 가지에 초점을 두고 있다. 첫 번째, 프로세스를 최적화시키기 위한 조정 기준을 제시한다. 이 전의 연구들에서는 프로세스를 조정 할때, 대부분 분석가의 직관과 경험에 의존했었다. 그러나, 본 연구에서는 이러한 분석가의 직관과 경험에 의존한 프로세스 조정을 최대한 줄일 수 있는 몇가지 간단하면서도, 강력한, 정량화 된 기준을 제시한다. 두 번째, 워크플로우에, 시간을 소요하는 처리와 하지 않는 처리로 구분 할 수 있으며, 처리 시간을 확률 함수로 파악함으로써 현실세계에 가까운 모델링을 할 수 있는, GSPN(Generalized Stochastic Petri-net)을 적용한 프로세스 모델링 방법을 제시한다. This paper proposes a method to analyze and design for workflow systems called GSWN(Generalized Stochastic Workflow Net), which is based on stochastic Petri-net, and an algorithm for workflow process optimization based on simulation analysis. The proposed modeling method was developed by adding workflow characteristics to stochastic petri-net. The proposed algorithm is consist of 4 major steps such as GSWN step, GSWN to matrix step, block establishing step, and process optimizing step.

Cupola 용탕을 이용한 CV 주철 제조기술 개발

최광림,최양진,신봉문,강세선 한밭대학교 산업과학기술연구소 1994 논문집 Vol.2 No.-

CV cast iron products was carried out in order to cupola process. CV cast iron products by cupola processing were obtained much more than 50kg/㎣ tensile strength and the excellent structure of CV graphite cast iron and gray cast iron. Casting waster due to the depress of pouring temperature by inoculation was reduced by development (improvement) in cast processing.

농축 탈지유 한외여과액으로부터 우유미네럴의 회수

임광세 ( Kwang Sei Lim ),오세종 ( Se Jong Oh ),박동준 ( Dong June Park ),임지영 ( Jee Young Imm ) 한국유가공기술과학회 2015 한국유가공기술과학회지 Vol.33 No.2

Milk mineral, which is also called milk calcium, was recovered from concentrated skim milk ultrafiltration permeate (CUFP). Lactose, the major constituent of CUFP, was crystallized by the addition of ethanol; lactose precipitation was observed to increase as the ratio of CUFP to ethanol increased. The calcium content of CUFP remained constant at a CUFP to ethanol ratio of 1:2, while it significantly decreased at a CUFP to ethanol ratio of 1:4. When ethanol (95%, v/v) was reused to precipitate lactose out of CUFP, 85% of the initial lactose precipitated out, while 82% of calcium remained soluble in the CUFP after storage for 24 h.

국내 기능성 발효유 시장 현황과 전망

임광세(Kwang Sei Lim) 한국식품영양과학회 2007 식품산업과 영양 Vol.12 No.2

프로바이오틱스가 생산하는 생리활성 물질의 장내 유해균 억제 효과

임광세 ( Kwang Sei Lim ),( Mansel W. Griffiths ),박동준 ( Dong June Park ),오세종 ( Se Jong Oh ) 한국유가공기술과학회 2014 Journal of Dairy Science and Biotechnology (JMSB) Vol.32 No.2

시장에는 프로바이오틱스를 포함한 무수히 많은 제품이 판매되고 있는데, 우리에게 어떤 이로운 점을 줄 수 있는지 궁금해 한 적이 있었을 것이다. 프로바이오틱스는 기본적인 영양 측면을 배제하고, 우리가 유효한 양을 섭취하였을 때 건강상의 이점을 주는 살아있는 미생물로 정의된다. 프로바이오틱스는 유용하고 건강에 좋은 미생물로도 불려지고 있으며, 다음과 같은 다섯 가지 측면에서 건강 기능성이있는 것으로 강조되어 왔는데, 1) 대장암 및 IBS와 같은 다른 대장(결장)관련 질병의 발병율 감소, 2) 면역 시스템의 촉진, 3) 항고혈압 및 항콜레스테롤 작용, 4) 장내세균에 작용하는 항생제의 효과를 경감시키고, 5) 위장관 감염을 예방시키는 점이다. 그러나 이러한 건강기능 작용들에 대한 과학적인 근거가 충분히 구축되어 있지는 않아, 유럽식품 위생위원회(Euroupe Food Safety Authority)는 항생제 투여에 따른 설사증상의 완화와 같은 건강기능 표시를 금지하고 있어, 프로바이오틱스의 작용기전에 대한 연구가 필요 한 시점이라 하겠다. There is a burgeoning number of products on the market that contain probiotics, but do they do you any good? What exactly are probiotics? They have been defined as living organisms that, when ingested in sufficient quantities, provide health benefits beyond basic nutrition. They are often referred to as "friendly bacteria" or "good bacteria." Probiotics have been claimed, amongst other things, to (i) reduce the incidence of colon cancer and other diseases of the colon, such as IBS, (ii) stimulate the immune system, (iii) have anti-hypertensive and anti-cholesterolemic properties, (iv) mitigate against the effect of antibiotics on the intestinal microbiota, and (v) protect against gastrointestinal infections. However, the scientific basis for many of these claims is not well-established. Indeed, the European Food Safety Authority has denied the use of several health claims associated with probiotics, particularly those related to mitigation of diarrhea following consumption of antibiotics. Thus, there is a need for research on the mechanisms of action of probiotics. We have been mainly interested in the use of probiotics to control enteric infections. There are several possible modes of action to explain how probiotics may protect the host from enteric pathogens, including competitive exclusion and immunomodulation. We have shown that probiotics produce bioactive molecules that interfere with bacterial cell-cell communication (also called quorum sensing), and this results in a down-regulation of virulence genes that are responsible for attachment of the pathogen to the gastrointestinal epithelium. These bioactive molecules act on a variety of bacteria, including enterohemorrhagic and enterotoxigenic Escherichia coli, Salmonella, Clostridium difficile and Clostridium perfringens, and there is evidence that they can inhibit the formation of biofilms by Listeria monocytogenes. These bioactive molecules, which are peptidic in nature, can exert their effects not only in vitro but also in vivo, and we have shown that they mitigate against E. coli O157:H7 and Salmonella in mice and Salmonella and E. coli K88 infections in pigs. They can be delivered in foods such as yoghurt and maintain their activity.

Ferroelectric-Paraelectric Phase Transition of CsH₂PO₄ studied by Static NMR and MAS NMR

Lim, Ae Ran,Lee, Kwang-Sei Korean Magnetic Resonance Society 2015 Journal of the Korean Magnetic Resonance Society Vol.19 No.1

The microscopic dynamics of $CsH_2PO_4$, with two distinct hydrogen bond lengths, are studied by static nuclear magnetic resonance (NMR) and magic angle spinning (MAS) NMR. The proton dynamics of the two crystallographically inequivalent hydrogen sites were discussed in terms of the $^1H$ NMR and $^1H$ MAS NMR spectra. Although the hydrogen bonds have two inequivalent sites, H(1) and H(2), distinct proton dynamics for the two sites were not found. Further, the $^{133}Cs$ spectrum is more or less continuous near $T_{C1}$ (=153 K). Finally, the phase transition mechanism of $T_{C1}$ in $CsH_2PO_4$ is related to the ordering of protons.

New ferroelastic properties and the paraelectric-ferroelectric-paraelectric phase transitions of Rochelle salt

Lim, Ae Ran,Lee, Kwang Sei American Institute of Physics 2011 JOURNAL OF APPLIED PHYSICS - Vol.110 No.3

고효율 유도전동기 소형 모터코어 금형개발에 관한 연구

임세종(Lim, Sae-Jong),김세환(Kim Sei-hwan),최계광(Chio Kye-Kwang) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.2

고효율 유도전동기는 일반 유도전동기의 발생 손실을 절감시킨 것으로 적은 소비전력으로 에너지를 절약하 고, 운전비용이 낮아서 단기간에 초기 설비투자 비용회수가 가능하고, 온도상승이 크지 않아 전동기 수명을 연장시킬 수 있다. 이에 포스코아에서는 이제까지의 경험을 바탕으로 전기 연구원과 협력하여 고효율 유도전동기 개발에 나섰 다. 본 논문에서는 고효율 유도전동기 소형모터금형개발에 관하여 연구하였다. The high-efficiency induction motor reduces the generation loss of conventional induction motors and saves energy with less electricity consumed, enabling the return of initial facilities investments on a shorter-term basis due to its low operation cost and allowing the extension of the life of the motor. Poscore has entered the phase of development of high-efficiency induction motor based on its experiences to date in cooperation with electricity researchers. This paper examines the development of the small motor die for the high-efficiency induction motor.

심장판막대치술시 저온 결정성 심정지액과 상온 혈성 심정지액의 수술후 회복의 비교

이광호,이경민,엄대자,김순열,임현교,배세관 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.32 No.4

Background: Recent interest in the use of normothermic blood cardioplegia is based on theoretical advantages over the traditional method of hypothermic myocardial protection. These reported advantages are a decrease in intraaortic balloon pump use, greater incidence of return to normal sinus rhythm, greater immediate cardiac outputs, and less time weaned from bypass after removal of the aortic cross-clamp. In addition to these advantages, normothermic blood cardioplegia offers the promise to resuscitate the ischemic myocardium and reduce the morbidity and mortality for patients with high-risk disease. This study was designed to compare the effects of cold crystalloid and normothermic blood cardioplegia on the postoperative recovery. Methods: To evaluate the efficacy of cold versus normothermic cardioplegia, forty-four patients scheduled to undergoing valvular replacement surgery were selected to receive intermittent cold(4℃) crystalloid cardioplegia(n=22), group I or continuous normothermic(37℃) blood cardilegia(n=22), group II. Cardiopulmonary bypass(CPB) and aortic cross-clamp(ACC) times were measured during the operation and patients were evaluated postoperatively for serum electrolytes, arterial blood gas analysis, blood pressure, heart rate, complications, ventilator periods and ICU stay. Results: The ACC and CPB times were significantly longer in group II(165.9±44.8 min, 210.9±60.2 min) compared with group I(121.2±38.7 min, 149.7±38.1 min)(p$lt;0.01). Group II patients had significantly higher serum potassium level(5.2±0.8 mEq/L) than group I(4.3±0.4 mEq/L) on the first postoperative day(p$lt;0.01). ICU stay and ventilator period were not significantly different in two groups. There was no significant difference in postoperative complications and mortality rates between two groups. Conclusions: These results suggest that the continuous normothermic blood cardioplegia may be useful in myocardial protection during cardiac operation. (Korean J Anesthesiol 1997; 32: 616∼623)

Postpartum urinary retention after vaginal delivery: Assessment of contributing factors

( Kyung Jin Lim ),( Maria Lee ),( Yeo Jung Moon ),( Sei Kwang Kim ),( Sang Wook Bai ) 대한산부인과학회 2009 Journal of Womens Medicine Vol.2 No.4

Objective: To evaluate the incidence of postpartum urinary retention (PUR) after vaginal delivery and to determine the risk factors for PUR. Methods: A retrospective case-control study of parturients with PUR after vaginal delivery between June 2007 and July 2008. Four controls, matched for date of delivery, were selected for each case in univariate and multivariate conditional logistic regression analyses. Results: There were 860 deliveries and 52 cases of PUR (incidence, 6%). All cases of PUR were managed with insertion of a Foley catheter with resolution before hospital discharge. Univariate analysis showed birth weight, increasing duration of the first and second stages of labor, biparietal diameter, perineal trauma, and epidural anesthesia to be significantly associated with PUR. Only perineal trauma remained statistically significant based on multivariate analysis. Conclusion: Perineal trauma was identified as the single most important associated risk factor for PUR after vaginal delivery. The findings of this study provide information for further exploration on how to reduce perineal trauma during vaginal delivery.