• Journal of Ginseng Research
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• 제4권1호
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• pp.104-120
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• 1980

The effects of temperature on transpiration, chlorophyll content, frequency and aperture of stomata, and leaf temperature of Panax ginseng were reviewed. Temperature changes of soil and air under spade roof were also reviewed. Growth responses of responses of ginseng plant at various temperature were assessed in relation to suseptibillity of ginseng plants. Reasonable management of ginseng fields was suggested based on the response of ginseng to various temperatures. Stomata frequency may be increased under high temperature during leaf$.$growing stage. Stomata aperture increased by high temperature but the increase of both frequency and aperture appears not enough for transpiration to overcome high temperature encountered during summer in most fields. Serial high temperature disorder, i.e high leaf temperature, chlorophyll loss, inhibition of photosynthesis, increased respiration and wilting might be alleviated by high humidity and abundant water supply to leaf. High air temperature which limits light transmission rate inside the shade roof, induces high soil temperature(optimum soil temperature 16∼18$^{\circ}C$) and both(especially the latter) are the principal factors to increase alternaria blight, anthracnose, early leaf fall, root rot and high missing rate of plant resulting in poor yield. High temperature disorder was lessen by abundant soil water(optimum 17∼21%) and could be decreased by lowering the content of availability of phosphorus and nitrogen in soil consequently resulting in less activity of microorganisms. Repeated plowing of fields during preparation seems to be effective for sterilization of pathogenic microoganisms by high soil temperature only on surface of soils. Low temperature damage appeared at thowing of soils and emergence stage of ginseng but reports were limited. Most limiting factor of yield appeared as physiological disorder and high pathogen activity due to high temperature during summer(about three months).

• Nutrition Research and Practice
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• 제12권2호
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• pp.143-148
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• 2018

BACKGROUND/OBJECTIVES: Average intake of calcium among college students is below the recommended intake, and knowledge surrounding the attitudinal and behavioral factors that influence milk and dairy intake, a primary food source of calcium, is limited. The purpose of this study was to evaluate college students' attitudes and behaviors concerning milk and dairy consumption and their association with calcium intake. SUBJECTS/METHODS: Participants were 1,730 undergraduate students who completed an online survey (SurveyMonkey) as part of baseline data collection for a social marketing dairy campaign. The online survey assessed attitudes and behaviors concerning milk and dairy intake, and calcium intake. Questions about milk- and dairy-related attitudes and behaviors were grouped into 14 factors using factor analysis. Predictors of calcium intake were then evaluated. RESULTS: Median calcium intake across all participants was 928.6 mg/day, with males consuming higher calcium intakes than females (P < 0.001). Adjusted for gender, calcium intakes were most strongly (and positively) correlated with associating milk with specific eating occasions and availability (i.e., storing calcium-rich foods in one's dorm or apartment) (both P < 0.001). Other correlates of calcium intake included: positive-viewing milk as healthy (P = 0.039), having family members who drink milk) (P = 0.039), and taking calcium supplements (P = 0.056); and negative-parent rules concerning milk (P = 0.031) and viewing milk in dining halls negatively (P = 0.05). CONCLUSIONS: Calcium intakes among college students enrolled in the current study was below the recommended dietary allowance of 1,000 mg/day, reinforcing the need for dietary interventions in this target population, especially females. Practitioners and researchers should consider the factors found here to impact calcium intake, particularly associating milk with specific eating occasions (e.g., milk with breakfast) and having calcium-rich foods available in the dorm room or apartment, as intervention strategies in future efforts aimed at promoting milk and dairy foods and beverages for improved calcium intake in college students.

• 한국식품영양학회지
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• 제27권1호
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• pp.136-146
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• 2014

A study was performed on the consumption of prepackaged meals (Dosirak) sold by food service providers through Importance-Satisfaction Analysis (ISA) to determine the factors that consumers seek in quality Dosirak. According to the analysis, food service providers need to concentrate on food freshness and temperature while maintaining food taste. As for food packaging, consumers were found to prefer microwaveable plastic containers the most (29.3%). Nonetheless, they found that packaging needed improvements in securing food content during transportation and in food labeling, especially for expiration dates. The study also investigated which factors, including menu selection and advertising, affected the sales of food service provider Dosirak the most. The most important factor was determined to be price. Regarding menu selection, the quality of food seasoning and ingredients, daily specials and the variety of combination sets were found to be important. Availability of delivery (3.83/5.00), advance ordering (3.82/5.00) and discounts (3.75/5.00) were important factors in advertising. The conclusions of the study point to a consumer base that recognizes the ease and benefits of Dosirak but desires high quality food items at low cost. To expand the consumer base, food service providers must continually develop new menu items that satisfy consumer tastes and trends, maintain sanitary conditions and improve food labelling.

• 한국식생활문화학회지
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• 제9권3호
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• pp.289-301
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• 1994

The purpose of this study was to investigate housewives' perception, interest and consumption of organic food, and to identify the variables influencing on them. The sample was selected from 411 housewives living in Seoul from 1st of September to 20th of September in 1993. Used statistical methods were frequency, percentage, mean, Cronbach's ${\alpha}$, factor analys, ANOVA, Duncan's multiple range test, t-test, correlation, regression analysis and Path analysis. The major results are as follows: 1) Housewives' perception degree of organic food in its variety, easy availability and contribution to health was relatively high level, but price level, reliability and packing condition was somewhat low level. Out of housewives' many images of organic food, taste health care, quality and necessity factors can be implicated. 2) Housewives' interest degree of organic food is somewhat high level 3) Housewives' consumption degree of organic food was relatively low level and was affected by their perception of oraganic food. 4) Frequency to use seasonings was the major independent variable which influenced to housewives' perception degree of organic food, while recognition on enviornmental contamination was the major independent variable which influenced to their interest degree of organic food, and their total perception on organic food was the major independent variable which influenced to their consumption degree of oragnic food. Therefore, it is considered that their total perception to it can decide the demand of organic food 5) Housewives' perception and interest degree of it was the major intervening variable which influenced to their consumption degree of oragnic food.

• 한국산학기술학회논문지
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• 제15권5호
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• pp.2870-2881
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• 2014

본 연구는 ICT 수출기업을 대상으로 하여 수출성과에 미치는 영향요인들을 실증적으로 분석하고자 하는데 그 목적이 있었다. 연구모형은 선행연구에서 논의되었던 변수들을 중심으로 하여 수출성과에 미치는 요인들을 크게 기업특성 요인, 마케팅 특성요인, 수출지원제도 특성요인 등 3개의 변수로 설정하였고, 종속변수로 수출성과를 비 재무적 성과로 설정하여 분석하였다. 분석 결과, 수출성과에 영향을 미치는 변수 중 기업특성 요인(CEO 시장 지향성, 수출경쟁력, 수출경험)과 마케팅 특성요인(해외 시장 다변화, 마케팅 애로 요인)은 수출 성과로 설정한 비 재무적 성과에 영향을 미치는 변수임을 알 수 있었다. 그러나 수출지원제도 특성 요인은 비 재무적 성과에 영향을 미치지 않는 변수임을 알 수 있었다.

• 한방비만학회지
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• 제17권2호
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• pp.127-132
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• 2017

Objectives: Recently, many studies have demonstrated that the waist-to-height ratio (WHtR) is more correlated with metabolic syndrome than the waist-hip ratio (WHR), body mass index (BMI). The aim of this study was to investigate and compare WHtR as a predictor of metabolic syndrome with other anthropometric indices. Methods: Approximately 3,800 data of subjects were used for the analysis, and data from Korean Medicine Data Centar). Receiver operating characteristic curve was performed and area under the curve (AUC) was calculated to find the usefulness of WHtR, WHR, and BMI. Results: WHtR was the most predictive factor with the highest diagnostic value for metabolic syndrome than WHR, BMI. AUC of WHtR was significantly higher in total subjects, men and women. Conclusions: WHtR may be the simple and effective anthropometric index for metabolic syndrome.

• 대한의용생체공학회:의공학회지
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• 제40권1호
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• pp.1-6
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• 2019

Human mesenchymal stem cells (hMSC) are multipotent stromal cells that have great potential to differentiate into a variety of cell types such as osteocytes, chondrocytes, and myocytes. Although there have been many studies on their clinical availability, little is known about how intracellular signals can be modulated by topographic features of the extracellular matrix (ECM). In this study, we investigated whether and how microwavy-patterned extracellular matrix (ECM) could affect the signaling activity of focal adhesion kinase (FAK), a key cellular adhesion protein. The fluorescence resonance energy transfer (FRET)-based FAK biosensor-transfected cells are incubated on microwavy-patterned surfaces and then platelet derived growth factor (PDGF) are treated to trigger FAK signals, followed by monitoring through live-cell FRET imaging in real time. As a result, we report that PDGF-induced FAK was highly activated in cells cultured on microwavy-patterned surface with L or M type, while inhibited by H type-patterned surface. In further studies, PDGF-induced FAK signals are regulated by functional support of actin filaments, microtubules, myosin-related proteins, suggesting that PDGF-induced FAK signals in hMSC upon microwavy surfaces are dependent on cytoskeleton (CSK)-actomyosin networks. Thus, our findings not only provide new insight on molecular mechanisms on how FAK signals can be regulated by distinct topographical cues of the ECM, but also may offer advantages in potential applications for regenerative medicine and tissue engineering.

• Asian-Australasian Journal of Animal Sciences
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• 제32권1호
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• pp.152-158
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• 2019

Objective: This study was conducted to evaluate the effect of water restriction (WR) on physiological and blood parameters in lactating dairy cows reared under Mediterranean climate. Methods: The trial lasted 16 days preceded by two weeks of adaptation to the experimental condition in spring 2014 on 6 dairy cows in mid-lactation. These cows were allowed water ad libitum for 4 days (W100) (hydration period), then split into 2 groups, one group has received 25% and the other 50% of water compared to their mean water consumption during the hydration period; then rehydrated for 4 days. Feed intake and physiological parameters: respiratory rate (RR), heart rate (HR), and rectal temperature (RT) were recorded twice a day. Blood was collected once a day and analyzed for serum concentration of glucose (Glc), triglycerides (TG), cholesterol (Chol), urea (Ur), creatinine (Crea), and total protein (TP) by enzymatic colorimetric method and cortisol (Cort) by radioimmunoassay. Results: Total dry matter intake (TDMI) was affected by WR. A decrease in TDMI was observed in WR groups compared to W100 group (effect, group, period, day, $group{\times}day$, $period{\times}day$: p<0.001). Also, WR resulted in a significant increase in RR, HR, RT in WR groups than in W100 group (effect, group: p<0.001). In addition, an increase in the serum concentration of Glc, TG, Chol, Ur, Crea, TP, and Cort was noted in WR groups (effect, group, period, day: p<0.001). Conclusion: This study has shown the ability of cows raised in a Mediterranean climate to cope with different levels of WR and thus reach a new equilibrium. As result, elucidates the important role of water as a limiting factor for livestock in environments with low water availability.

• 한국항만경제학회지
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• 제35권1호
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• pp.97-116
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• 2019

국가산업단지 및 수출입공항 항만은 물류의 주요 결절점으로 물류서비스 용이성은 국내 전체 공급망의 성공적인 운영과 밀접한 관계가 있다. 이에 국가에서는 각 시설에 대한 개발계획을 세워 지속적으로 관리하고 있으나, 명확한 현황진단방법의 부재로 인해 투자 대상의 선정 및 우선순위설정 등에 어려움을 겪고 있는 실정이다. 따라서 원활한 국가물류 및 투자 효율성 확보를 위해서는 국가산업단지, 수출입 공항 및 항만을 대상으로 물류서비스 수준에 대한 현황을 명확히 진단하고 이를 바탕으로 한 지속적인 관리 및 개발이 필요하다. 본 연구에서는 이용자가 인지하는 물류서비스요소와 실제 시설개선 대상인 물류시설요소로 구분되는 물류서비스 현황진단요소 구성안을 도출하였으며 이를 적용하여 실제 시설을 진단하고 부족한 물류서비스요소의 개선을 위한 물류시설요소들의 개선 우선순위를 결정하는 적용방법을 함께 제안하였다. 마지막으로 국가산업단지 3개소, 수출입항만 3개소, 수출입공항 2개소 등 실제 시설에 개발한 진단방법론을 적용함으로써 연구 결과의 활용성을 확인하였다.

• 한국산학기술학회논문지
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• 제22권3호
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• pp.234-241
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• 2021

군에서는 수요예측에 대한 중요성을 인식하여 수리부속에 대해 예측 정확도 향상을 위한 많은 연구가 이루어지고 있다. 수리부속 수요예측은 예산 운영과 장비 가동률 측면에서 매우 중요한 요소가 되고 있다. 그러나 현재 군에서 적용중인 시계열 모형으로는 수요량의 변동과 발생주기가 일정하지 않은 간헐적 수요에 대해서는 예측에 한계가 있는 실정이다. 따라서, 본 연구는 공군 패트리어트 수리부속의 간헐적 수요에 대한 예측 정확도를 제고하는 방법을 제시하고자 하였다. 이를 위해서 2013년부터 2019년까지의 701개의 수리부속 소모개수를 토대로 수요 유형을 구분하여 수리부속의 간헐적 수요 자료를 수집하였다. 또한, 장비 고장에 영향을 줄 수 있는 외부 요인으로는 기온, 장비운영시간을 식별하여 입력변수로 선정하였다. 그 후, 소모개수와 외부 요인을 통해 군에서 적용하는 시계열 모형과 제안하는 데이터 마이닝 모형으로 예측을 실시하여 모형별 예측 정확도를 판단했다. 예측 결과로 기존의 시계열 모형과 비교하여 데이터 마이닝 모형의 예측 정확도가 높았으며, 그 중 다층 퍼셉트론 모형이 가장 우수한 성능을 보였다.