• Journal of the Korean Dietetic Association
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• v.28 no.2
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• pp.127-142
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• 2022

This study was undertaken to investigate the association between maternal nutrition knowledge, dietary attitudes, and behaviors related to sugar intake and sugar intake reduction in preschool children. Eighty-three children aged 5 to 6 years attending kindergartens in Hongseong and their mothers participated in this study from October 2020 to February 2021. The average age of the mothers was 38.7 years, and 53.0% of the children were male. As child age increased, nutrition knowledge of sugar intake reduction increased, but no relation was found between age and, dietary behavior and preference related to sugar intake reduction. For children whose mothers perceived that their child's sugar preference was high, the behavioral score of sugar intake reduction was low. The more mothers allowed their children to eat sweet food; the higher was their child's preference for sweet food, which was also significantly associated with an increased risk of high sugar intake. When mothers were provided education that encouraged reducing children's sugar intakes, knowledge about reducing sugar intake in children was significantly increased. The study emphasizes the importance of the roles of mothers and primary caregivers regarding reducing the sugar intakes of preschool children.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.1
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• pp.80-85
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• 2004

The purpose of this experiment was to assess seasonal variation of feed utilization by feed sources and to obtain information on the use of feed resources by comparing seasonal changes of dry matter intake, digestibility, nitrogen balance and feeding behavior in spotted deer (Cervus nippon) fed forest by-product silage (FBS) and corn silage (CS). Dry matter intake (DMI) of FBS was higher than that of CS in both winter and summer. While DMI of both diets was higher in summer, this was not significant at the 5% level. In contrast to DMI, digestible dry matter intake (DDMI) was higher for CS than for FBS in both seasons, but the difference was not significant. Digestibility of dry matter and crude protein was significantly higher (p<0.01) for CS than for FBS, whereas digestibility of crude fiber was significantly higher (p<0.01) for FBS than for CS in both seasons. Seasonal digestibility of dry matter and crude fiber for FBS was significantly greater (p<0.01) in summer than in winter: In summer, seasonal digestibility was 57.2% for dry matter and 55.5% for crude fiber, and in winter, 50.8% for dry matter and 30.7% for crude fiber. On the other hand, seasonal digestibility of crude protein was higher (p<0.01) in winter (42.1%) than in summer (32.3%). No significant difference (p>0.05) was found between the two seasons and diets for nitrogen intake (NI), 18.7 g/d in summer and 19.4 g/d in winter for FBS, 17.7 g/d in summer and 17.7 g/d in winter for CS. Fecal nitrogen was higher (p<0.01) for FBS than for CS and varied little seasonally. There was significant difference (p<0.01) between two seasons in urinary nitrogen, which was little difference between two diets. Retained nitrogen (RN) was different significantly (p<0.01) between two diets in both seasons, but there was little difference between seasons. Deer usually spent longer time on eating FBS than eating CS. Eating FBS took 221 min in summer and 187 min in winter, whereas eating CS took 113 min in summer and 109 min in winter. Deer spent less time on eating food in winter than in summer. Time spent on rumination was longer for FBS than for CS: for FBS, 504 min in summer and 456 min in winter, for CS, 423 min in summer and 279 min in winter. Time varied seasonally with both diets.

• Nutrition Research and Practice
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• v.9 no.4
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• pp.411-419
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• 2015

BACKGROUND/OBJECTIVES: This study analyzed factors affecting consumption frequencies of vegetables and fruits in Korean adolescents. SUBJECTS/METHODS: Consumption frequencies of vegetables and fruits, general characteristics, meal, health, and other variables were analyzed for a total of 147,047 adolescents who participated in the KYRBWS (Korea Youth Risk Behavior Web-based Survey) conducted in 2006 and 2011 by the Korea Centers for Disease Control and Prevention. RESULTS: Consumption frequencies of vegetables and fruits more than once a day significantly decreased in 2011 compared to 2006 based on Chi-square test conducted for every factor employed in the study. Analysis of factors showed that consumption frequencies of vegetables and fruits were reduced in both study years as subjective income decreased, whereas intake frequencies increased with mother's education level and reduction of adolescent stress level. CONCLUSIONS: In general, consumption frequencies of vegetables and fruits decreased in 2011 compared to those in 2006. Thus, future research needs to improve dietary guidelines for nutrition education in order for students to recognize the importance of food consumption and necessity of increasing daily serving sizes of vegetables and fruits for their balanced consumption.

• 한국전산유체공학회:학술대회논문집
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• 2010.05a
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• pp.208-213
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• 2010

In this study CFD(Computational Fluid Dynamics) analysis of the steady fire-driven fuid flow for the performance test of ventilation at railway tunnel between Heuksok and Nodeul Station from Seoul Metro 9 is performed. There were fans with exhaust and intake modes and each was installed at the middle and both ends of the tunnel. For this test, the pool fire source of methyl alcohol with 1.5MW and smoke generators were installed between the middle of tunnel and Heuksok Station. In this test, the smoke behavior from natural convection was observed for 10 minutes from the ignition of pool fire and then fans with intake-modes at both sides of Heuksok effect of fan-on with intake mode located in the opposite side of the tunnel nearby Heuksok Station on fire-driven fluid flow is studied on when the boundary conditions of fan-on at the tunnel between Heuksok and Nodeul Station are the same as test. FLUENT, a commercial CFD code, is used for this analysis.

• Transactions of the Korean Society of Automotive Engineers
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• v.7 no.8
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• pp.116-122
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• 1999

According to the stringent exhaust emission regulation, precise control of air fuel ratio is one of the most important issues on gasoline engine. Although many researches have been carried out to identify the fuel transport phenomena in a port fueled gasoline engine, complexity of fuel film behavior in the intake port makes it difficult. The fuel film behavior was investigated recently by using visualization method and these gave us qualitative understanding. The purpose of this study is to estimate of wall wetting fuel in the intake port and the inducted fuel mass was predicted by using wall wetting fuel model . The model coefficient($\alpha$,$\beta$) and fuel film mass on the port wall were determined from measured in-cylinder HC concentration using FRFID after injection off. The fuel film mass was increased, but $\alpha$(ratio of directly inducted fuel mass into cylinder from injected fuel mass) was decreased with increasing load at the same engine speed. $\beta$is nearly constant value(0.8~0.9). when injected fuel mass is varied at 1500rpm , the calculated air fuel ratio using well wetting fuel model was nearly the same as measured by UEGO.

• Journal of The Korean Society of Grassland and Forage Science
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• v.16 no.4
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• pp.267-274
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• 1996

This experiment was carried out to investigate the effect of pasture types(mixture and mono tall fescue pasture) and endophyte infection on the animal behavior of Korean native cattle at the Experimental Field of Grassland and Forage Crops Division, National Livestock Research Institute, Suweon, in 1994. The results obtained are sumunarized as follows: DM intake of Korean native cattle was increased with mixture and endophyte-free tall fescue for both pasture types. Mixture and endophyte-free tall fescue showed good animal preference. Daily grazing time was increased with mixture and endophyte-free tall fescue in monoculture, while annual grazing period was increased with monoculture and endophyte-infect tall fescue. Amount of drinking water of Korean native cattle was increased with tall fescue monoculture rather than mixture, however the amount of drinking water was higher with endophyte-infect tall fescue in monoculture. Salt intake of Korean native cattle was increased with mixture and endophyte-6ee tall fescue in monoculture. Rectal temperature of Korean native cattle was not influenced by pasture types and endophyte infection. Based on the results of this experiment, DM intake of Korean native cattle and daily grazing time were increased by mixture and endophyte-free tall fescue with good quality.

• Journal of the East Asian Society of Dietary Life
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• v.12 no.5
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• pp.343-351
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• 2002

This survey was conducted to investigate the dietary behavior and health status of Buddhist nuns. In this study, 100 Buddhist nuns in Seoul were selected. The dietary survey was focused on the diet in winter. The age distribution was as follows; 24% of the subjects were in their 20s, 45% in their 30s, 23% in their 40s, and 8% in their 50's and over, respectively. The percentage of the subjects living in temples close to the downtown area was 77% and the rest resided in areas remote to the downtown area. Over fifty percent of the subjects were satisfied with their diet at temple. And 59% of the subjects were eating a snack more than once a day. The snacks included fruits (60%), raditional tea (20%), coffee (9%), bread and cookies (4%), md rice cakes (3%), etc. Among food groups, the intake of green-vegetables and fruits were the highest and intake of milk and bean products were low which may cause calcium and protein deficiency. Most of the subjects believed that their health conditions were average or above average. About 50% of subjects didn't exercise at all. The frequencies of gastro-intestinal diseases and anemia were extremely high. About 50% of subjects took some form of medicine. To improve their health and nutritional status, it is required that they practice a good dietary behavior, maintain a balanced diet, and exercise regularly.

• Preventive Nutrition and Food Science
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• v.10 no.2
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• pp.179-186
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• 2005

This study was conducted to find the gender and age differences in dietary behaviors and food consumption pattern of Korean American adults living in western parts of USA. The structured survey forms and self-administered food frequency questionnaire were used to assess dietary behavior and nutrient intakes. It was found that younger subjects kept their meal time more irregularly and skipped breakfast more often than older subjects due to lack of time. There were significant age differences in skipping meals, kind of skipping meals, and the reasons for skipping meals. Young subjects consumed more American type food while older subjects consumed more traditional Korean food. Nutrient intakes of males' except for the elderly were significantly higher in energy, protein, Fe and P than those of females'. Vitamin A and vitamin C intake were significantly higher in females. Energy ratio of carbohydrate: protein: fat was 56.2 : 16.8 : 27.0. Females consumed more plant food as their dietary sources of protein, fat, Ca and Fe, compared to males. Ca intakes of participants' were below $75\%$ of RDA except for the youngest male and $30\~49$ aged male and females. Futhermore, Ca intake was below $70\%$ after age 50 in both genders. Effective nutrition education program targeting Korean Americans in the community should be developed and implemented to increase Ca consumption.

• The Korean Journal of Food And Nutrition
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• v.17 no.4
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• pp.356-367
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• 2004

This study was performed to evaluate the effectiveness of a nutritional education program conducted by public health center in Jinju city for obese women. The subjects of this study consisted of 27 obese women(BMI $\geq$ 25) aged 35∼55 years in Jinju area, and the educational period was 6 weeks. We evaluated the anthropometric parameters and biochemical indices, dietary habits, dietary behaviors, nutritional attitude of obese women before and after the nutritional education. And also daily intake during the educational period were measured. Weight, obesity index, BMT, waist circumferences and hip circumferences of obese women were significantly decreased(p<0.001) after nutritional education, but changes of WHR, systolic blood pressure and diastolic blood pressure were not significant. There were no significant difference in total cholesterol, HDL-cholesterol, LDL-cholesterol, triglyceride, LDH and blood glucose level in serum before and after the nutritional education, but the indices tend to decrease after the nutritional education. There was significantly different change of dietary behaviors in 3 items among the dietary behavior after the nutritional education. Their dietary habit, dietary behavior and nutritional attitude scores were significantly improved after the nutritional education. Mean daily energy intakes was low compared with the RDA as 78.88%. The average carbohydrates, protein, fat ratio on the energy intakes was 63 : 17 : 20. The proportion of energy intake from snacks the was 12.91${\pm}$6.15%.

• Journal of The Korean Society of Grassland and Forage Science
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• v.28 no.2
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• pp.107-118
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• 2008

This study was carried out to investigate the effects of dietary supplementation of spent mushroom substrates on eating time, ruminating and resting time of growing Hanwoo. A total of eighteen growing Hanwoo $(357.0{\pm}2.9kg)$ were allocated into three feeding groups and assigned to three dietary treatments: Control (C : concentrate + rice straw; 5.32 kg + intake of free), T1 (concentrate + spent mushroom substrates + rice straw; 5.32 kg +0.82 kg + intake of free) and T2 (concentrate + spent mushroom substrates + rice straw; 5.32 kg + 1.64 kg + intake of free). Intake of rice straw was the highest at C (2.66 kg), while T2 (2.03 kg) was the lowest. But total intake and NDF intake were highly in order of T2 > T1 > C (p<0.05). Eating time was similar in C and T1 with 289.3 and 290.5 minutes, and that in T1 was the shortest with 236.0 minutes (p<0.05). When spent mushroom substrates were increased by 0 (0.0 kg), 15 (0.82 kg) and 30% (1.64 kg) of concentrate, chewing time was decreased linearly from 451.0 and 402.3 to 359.5 minutes (p<0.05), which was due to the particle size of very small feed. Number of bolus, number of chews, number of chews/bolus and FVI (chewing time/intake of feed 1kg) showed the highest to all in C. But ruminating time per bolus was the longest in T2 (69.4 min.), and number of bolus per minute was the highest at T1 (1.07 no.) Eating rate, ruminating efficiency and chewing efficiency were significantly higher (p<0.05) in T1 and T2 than in C, which was due to increased feed intake and the small particle size of spent mushroom substrates. When fed with concentrate, Hanwoo group did united behavior in the all treatment (C, T1 and T2). But group behavior in ruminating and resting was hardly influenced by feeding levels of roughage. Consequently, spent mushroom substrates could be used up to from 15 to 30% in growing Hanwoo roughage source without any harmful effect on eating behavior.