• 한국식품저장유통학회지
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• 제18권3호
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• pp.423-428
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• 2011

주요 식중독균인 E. coli O157:H7, L monocytogenes, S. aureus, S. Typhimurium과 S. Enteritidis를 주어진 이산화염소수 농도에서 시간별로 처리한 inactivation data를 first-order kinetic model과 Weibull model을 이용하여 kinetic parameter를 비교, 분석하였다. 그 결과 Weibull model이 first-order kinetic model보다 inactivation kinetic data에 더 적합한 것을 보였다. 또한 특정 농도의 이산화염소수에서 처리한 survival plot의 tR values(특정 이산화염소수 농도에서 미생물 90%를 감소시키기 위해 필요한 시간)는 Weibull model을 적용 시, E. coli O157:H7가 5 ppm에서 2.49 min, L. monocytogenes가 5 ppm에서 1.47 min, S. aureus가 5 ppm에서 0.94 min, S. Typhimurium이 1 ppm에서 0.87 min 그리고 S. Enteritidis가 1 ppm에서 0.08 min으로 측정 되었다.

• 한국식품영양학회지
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• 제12권4호
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• pp.344-349
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• 1999

The mineral contents were analyzed for apple juices by Inductively Coupled Plasma. The Mg contents of tested commercial apple juices ranged 6.27∼32.91ppm, Ca 15,95∼3.11.76ppm K231∼1148.02ppm Na 39.82∼115.68ppm and P 19.27∼304.02ppm. The mineal contents of model apple juice were Mg 29.83∼45.65ppm Ca 16.98∼30.98ppm K 814.28∼1,256.70ppm Na 19.88∼26.85ppm and P 25.88∼54.71ppm. respectively. Comparing mineral contents of model apple juices and commercial apple juice, Na, Ca and P contents of commercial apple juices were higher but Mg, K contents were lower than that of model apple juices. Among the mineral content of apple juices. K was the major element.

• 한국컴퓨터정보학회논문지
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• 제12권4호
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• pp.209-219
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• 2007

100PPM 품질인증시스템은 1995년 공업진흥청의 주도하에 추진되어져, 우리나라 산업부분의 품질경쟁력 제고에 기여하였다. 2000년에는 국내의 중소기업을 대상으로 보다 더 완벽한 수준의 Single PPM 품질인증시스템으로 상향 조정토록 하였고, 출하불량률과 시장 불량률 수준을 10ppm 이하로 줄이는 것을 품질목표로 하고 있다. 현재까지 1.818개의 회사들이 Single PPM 품질인증시스템을 인증 받았으며, Single PPM 품질혁신운동은 21C의 사회 경제적인 무결점 목표를 달성하기 위한 품질혁신운동이다. 이 논문의 목적은 Single PPM 품질혁신운동이 현재 처해있는 문제점들을 개선하고자, Kano 모델에 기반을 둔 글로벌 지속가능 품질혁신(GSQI) 지수를 개발하고, 이를 통하여 Single PPM 품질혁신운동의 개선을 도모하고자 함이다.

• 벤처혁신연구
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• 제2권2호
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• pp.79-94
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• 2019

본 연구의 목적은 농어촌 체험에 영향을 미치는 요인을 통합된 PPM모델(unified push-pull-mooring model)을 적용하여 탐색하는 것이다. 이론적인 모델은 PPM을 근간으로 하여 새로운 변수들을 도입한 통합된 PPM모델이다. 새롭게 도입된 변수 중 pull 요인은 체험이론과 ServQual 모형을 바탕으로 재구성하였다. 종속변수는 고객 만족을 설정하였다. 가설은 다음과 같이 설정하였다. Push 요인은 체험 만족에 부(-)의 영향을 미치고, Pull 요인인 체험요소와 체험품질은 체험 만족에 정(+)의 영향을 미칠 것이다. 또한, mooring 요인은 체험 만족에 부(-)의 영향을 미칠 것이다. 본 연구의 연구 모형을 314개 설문데이터를 기반으로 하여 구조방정식으로 검정하였다. 연구 결과 Pull 요인인 체험품질은 체험 만족에 정(+)의 영향을 미쳤다. Mooring 요인은 체험의도에 부(-)의 영향을 미치는 것으로 나타났다. 하지만, push 요인과 체험 만족 간, 체험요소와 체험 만족 간에는 유의한 영향 관계가 검정되지 않았다. 이러한 연구 결과는 이론적으로는 농어촌 체험에 있어서 기존의 pull, push 요인 위주의 분석에서 나아가 심리적인 mooring 요인도 체험에 중요한 영향을 미친다는 것을 검정하였다. Pull 요인으로 도입된 체험요소와 체험품질을 바탕으로 제안된 통합된 PPM모델이 유용한 분석의 틀이 될 수 있음을 검정하였다. 실무적으로는 농어촌 체험을 활성화시키기 위해 어떠한 요소에 전략적으로나 마케팅적으로 집중해야 하는지에 대한 시사점을 제공할 수 있었다.

• 한국태양에너지학회 논문집
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• 제31권5호
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• pp.85-90
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• 2011

The effects of $CO_2$ ppm in atmosphere on the values of the total emissivity are studied. The predictions by several methods are compared. The predicted value differences between modified Kondratyev model and Hottel model are the smallest with in the range of values tested. The $CO_2$ ppm is varied from 300 ppm to 600 ppm. By Wide Band model, the total emissivity increases with increasing density-path length product rather linearly up to 0.1 g/$cm^2$. For given $CO_2$ ppm, the total emissivity increases as the air thickness increases. The same is true for both temperature and pressure increase. The temperature range tested is 220 to 300 K. Around 260K, the total emissivity is less sensitive with increasing temperature than with decreasing temperature. The pressure is varied from 0.94 to 1.06 atm. The percentage change of total emissivity with pressure change from 1atm is at most the percentage change of the pressure.

• 한국터널지하공간학회 논문집
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• 제14권6호
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• pp.607-616
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• 2012

지속적인 터널 건설의 증가는 터널 내 대기질 관리에 대한 필요성을 점증시키고 있어 측정 및 모델 모사를 통한 터널 내 대기질 거동에 대한 연구를 수행하였다. 남산1호 터널 입구와 출구의 $CO_2$ 농도차는 250 ppm~400 ppm으로 출구쪽이 높았으며 환기를 안 하는 차량 내부의 농도는 외부에 비해 200 ppm~300 ppm 낮게 측정되었다. 교통량이 적을 시 터널 내 유속은 빨라지며 일정한 농도 구배를 나타내고, 교통량이 증가하면 일정치 않은 농도 구배를 나타내는 것으로 나타났다.

• Advances in environmental research
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• 제5권4호
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• pp.213-224
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• 2016

This paper presents a numerical model based on a UTCHEM simulator to simulate surfactant flushing process to remediate diesel contaminated sand column. For this purpose, we modeled remediation process under 10000 and 20000 ppm initial concentrations of diesel. Various percent-mass sodium dodecyl sulfate (SDS) considered in our model. The model results indicated that 0.3 percent-mass of SDS at 10000 ppm and 0.1 percent-mass of SDS at 20000 ppm initial diesel concentration had maximum removal perdition which is in agreement with the experiment results. For 10000 ppm diesel concentrations, the coefficient of determination ($R^2$) and index of agreement (IA) between the model result and the experimental data were 0.9952 and 0.9695, respectively, and for 20000 ppm diesel concentrations, $R^2$ and IA were 0.9977 and 0.9935, respectively. The sensitivity analysis of permeability illustrated that in all diesel concentrations and SDS percent-mass with increasing permeability the model resulted in more removal efficiency.

• Food Science and Biotechnology
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• 제16권5호
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• pp.753-758
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• 2007

This study was conducted to investigate the antioxidant activity of paprika in the lard-pork model system adding ground fresh paprika (3%) and paprika powders (5%). Paprika powders were obtained through 4 drying methods (freeze, vacuum, far infrared-ray, and hot-air). In the lard and meat-fat mixture (containing lard 30%) containing paprika powders, the rate of increase in the peroxide value (POV) and thiobarbituric acid (TBA) value decreased notably during the refrigerated storage ($4^{\circ}C$) compared to the control without paprika. Therefore, paprika powders showed potent antioxidant activity and especially the freeze dried paprika powder revealed the most effective activity among them. However, its antioxidant activity was still lower than that of the fresh paprika because the addition of fresh paprika in the lard and meat-fat mixture merely increased the POV and TBA value. In linoleic acid oxidation, the addition of capsanthin 500 ppm to mixed linoleic acid and 10 ppm of $FeCl_3$ (LF) inhibited the formation of peroxides by 15.2% compared to LF, showing its iron scavenging ability. When mixed antioxidants (${\beta}$-carotene 200 ppm + ascorbic acid 100 ppm, capsanthin 200 ppm + ascorbic acid 100 ppm) were added in LF, synergistic effects were obtained with 57.7 and 60.4% of inhibition of peroxide formation, respectively.

• Design & Manufacturing
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• 제15권2호
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• pp.49-55
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• 2021

In this study, CALPUFF, a three-dimensional atmospheric diffusion model, was used to predict the degree of influence of pollutants generated during clean center operation on surrounding areas. To drive the CALPUFF model, CALMET, a weather field calculation model, was used. Due to the influence of the wind field, air pollutants from the Clean Center diffused in the southeast direction, increasing the distribution area. SOx satisfies atmospheric environmental standards with an annual average value of 0.02 ppm or less NOx satisfies atmospheric environmental standards with an annual average value of 0.03 ppm or less. Dust (PM-10) satisfies atmospheric environmental standards with an annual average value of 50㎍/m³ or less and 24 hours average value of 100㎍/m³ or less. CO satisfies atmospheric environmental standards with an 8 hours average value of 9 ppm or less and an 1 hour average value of 25 ppm or less.

• Journal of Information Technology Applications and Management
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• 제27권5호
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• pp.49-68
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• 2020

The Push-Pull-Mooring (PPM) model employ to explore the factors that affect the switching intention of mobile game players by analyzing the online survey data of 240 mobile game players in China. From the perspective of PPM model, Dissatisfaction with the current mobile game can promote players to leave the current mobile game, and other more attractive mobile games can pull players out of the current mobile game. As a mooring factor, habit can affect players' switching decisions. Players who have formed strong habits in current mobile games are more likely to resist or ignore the attractiveness of other mobile games and stay in the current mobile games rather than migrate to other mobile games. Another result shows that the more dissatisfied with the current mobile game, the higher the quality of alternative (relative challenge) mobile game, and the lower the investment size in the current mobile game, the more reluctant the players are to continue to maintain the relationship with the current mobile game. The higher the player's commitment to the current mobile game, the more likely it is to maintain the relationship with the current mobile game. The empirical results show that the framework of this study is highly consistent with the results of PPM model, and confirming that they can well apply to mobile game situations.