• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 추계학술대회논문집
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• pp.223-226
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• 2004

Vibration analysis of pipe with Elbow subject to internal pressure and temperature is studied through a commercial finite element analysis tool. The natural frequency of Elbow increased very slightly as internal pressure increases. Meanwhile, the frequency of Elbow decreased as temperature increases. It is shown that frequency deviation caused by temperature was greater than that caused by pressure. As the length of Elbows increases, frequency deviation by temperature stew rapidly, but frequency deviation by pressure was not so high. It is concluded that more concern needs to be focused on temperature rather than on pressure in terms of natural frequency.

• 한국식생활문화학회지
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• 제11권1호
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• pp.61-69
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• 1996

This study was carried on the analysis of food and nutrient intake for elementary school foodservices in Seoul. The survey was conducted through the 200 menus submitted by the 5 elementary schools in Seoul. Energy and all nutrient intakes exceeded the Recommended Daily Allowances of Koreans. Carbohydrate provided 56.32% of total energy intake; protein accounted for 16.06%; fat provided 27.62%. Total intake of food was 549 g on the average, which consisted of 90.04 g cereals, 130.17 g vegetables, 31.56 g meats, 21.63 g fishes and 200.00 g milks. The basic menu patterns were Rice+Soup (or Stew)+Kimchi, and 2 other side dishes including milk. These data underscore the necessity of developing the 'Standard Menu' for elementary school foodservices.

• 한국정밀공학회지
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• 제14권1호
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• pp.78-83
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• 1997

The paper presents the experimental analysis of a Stewart platform-based force-torque senor. The closed-form solution of forward kinematics of the Stewart platform is derived approximately by way of a linearization technique, and the solution is used in the force analysis of the force-torque sensor. An exper- mental studies show that the proposed method including gravity compensation algorithm is valid for Stew- art platform-based force-torque sensors. The performance of the developed force-torque sensor is evaluated in view of accuracy and linearity in measurements.

• 한국식품영양과학회지
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• 제38권10호
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• pp.1362-1372
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• 2009

본 연구는 65세 이상 노인을 대상으로 고나트륨 섭취군을 분류하여 노인들의 식습관 개선 및 영양교육을 위한 사전연구로서 이들의 영양지식, 식습관, 식품섭취패턴을 조사하였다. 65세 이상 노인 135명의 조사대상자 중 42.96%인 58명이고나트륨 섭취군에 속하였다. 생활습관에서 음주, 간식횟수, 외식횟수, 수분섭취량에서 고나트륨 섭취군이 유의적으로 높게 나타났으며, 자반류, 젓갈류, 장아찌, 조림류, 국물 섭취량, 간장과 소금의 추가량에 관한 식습관 점수가 고나트륨 섭취군에서 유의적으로 높았다. 고나트륨 섭취군의 나트륨에 관한 영양지식 총점이 남녀노인 모두 유의적으로 낮았으며, 남자노인은 나트륨과 인스턴트식품, 나트륨과 인공조미료에 관한 문항에서, 여자노인은 나트륨과 질병과의 관계, 나트륨 섭취권장량에서 유의적으로 낮았다. 고나트륨 섭취군에서 Na index 14의 김치찌개, 된장찌개, 미역국, 멸치볶음에서의 섭취빈도가 유의적으로 높았다. 또한 인스턴트식품을 통한 총 나트륨 섭취량은 고나트륨 섭취군에서 남자노인 1562.49 mg, 여자노인 1227.82 mg으로 유의하게 높았으며, 특히 면류를 통한 섭취량이 70% 이상이었다. 영양지식 점수가 높을수록 Na index 14 점수(p<0.05), 인스턴트식품을 통한 나트륨 섭취량(p<0.01), 나트륨 섭취 관련 식습관 점수가 낮았다. Na index 14 점수에 대해 세끼 식사의 규칙성, 식사량의 적정성, 천천히 식사함(p<0.01) 항목에서 유의한 음의 상관관계를 나타내었으며, Na index 14 점수가 높을수록 인스턴트 국류(p<0.01), 탕류(p<0.01), 죽류(p<0.01), 스프류(p<0.01), 면류(p<0.01), 레토르트류(p<0.01)의 섭취가 높았다. 본 연구는 65세 이상 노인을 대상으로 하여 나트륨 과잉 섭취 노인의 특성 및 섭취요인을 진단하였다는 점에서 그 의의가 있다고 사료된다. 이에 고나트륨 섭취군을 대상으로 본 연구에서 드러난 문제점을 도출하여 이들의 영양지식, 식습관, 식품섭취패턴이 개선될 수 있도록 구체적인 대안을 제시하고 행동변화에 중점을 두는 영양교육이 요구되어지는 바이다.

• 한국식품영양과학회지
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• 제42권7호
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• pp.1148-1156
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• 2013

초등학생의 김치섭취량 증가를 목적으로 초등학교 급식용 김치 메뉴를 개발하고 평가하였다. 먼저 부산광역시 소재 H 초등학교 학생의 김치 섭취 실태조사 및 초등학교 영양(교)사를(n=87) 대상으로 NEIS(교육행정정보시스템, National Education Information System)에 등록된 김치 메뉴의 학교 급식 활용도를 조사하였으며, 문헌 및 실험조리에 근거한 초등학교급식용 김치 메뉴 7가지를 개발하였다. 각각의 메뉴를 학교 급식에 적용한 후 학생들의 기호도 및 잔반량 조사를 통하여 메뉴를 평가하였다. 또한 선정된 메뉴의 표준레시피에 대한 영양(교)사의 급식 활용 의사를 알아보았다. 주요한 결과는 다음과 같다. 저학년(2학년)과 고학년(5학년)의 급식 시 김치 섭취량은 각각 7.7 g 및 6.9 g으로 한국인을 위한 식사구성안에서 제시한 분량(40 g)의 19.3% 및 17.3%에 불과하였다. NEIS에 등록된 29종의 김치 메뉴에 대하여 설문 대상 학교의 75% 이상에서 연 7회 이상 활용한 메뉴는 단 하나도 없었으며, 김치찌개가 유일하게 절반 정도의 학교에서 제공되었다. 닭살김치튀김, 김치스테이크를 포함한 10가지 메뉴는 전체의 75%가 급식에 전혀 이용하지 않았으며, 밥, 죽, 볶음, 전, 튀김, 구이류는 전체 3/4의 학교에서 김치 메뉴로 활용되지 않았다. 이를 바탕으로 메뉴의 김치 사용량이 10~20 g(1인분)이면서 메뉴 재료의 김치 비율이 30%를 넘는 7가지 메뉴를 개발하였다. 1차 기호도 및 잔반량 조사 결과 김치치즈크로켓과 김치소스두부덮밥이 가장 높은 점수를 받았고, 다음은 김치완자, 김치닭감자찜, 김치베이컨주먹밥, 김치채소우동볶음, 김치감자샐러드 및 김치계란찜의 순으로 나타났다. 상위 50%의 메뉴에 대하여 저학년 및 고학년(n=100) 대상 2차 기호도 및 잔반량 조사 결과, 김치완자가 4.3점으로 가장 높았으며 김치닭감자찜 및 김치치즈크로켓도 4점 이상의 비교적 높은 선호도를 보였다. 김치소스두부덮밥은 1차 조사와 달리 종합점수 3.8점 및 17.1%의 잔반을 보였다. 개발된 8종의 메뉴에 대한 표준레시피를 초등학교 영양(교)사가 평가한 결과 김치치즈크로켓이 활용 가능성이 가장 높았고 김치감자샐러드가 가장 낮았다. 종합해 볼 때, 초등학교 급식용 김치 메뉴개발은 초등학생의 김치 섭취량 향상 및 김치 기호도의 증가에 기여할 것으로 기대된다.

• Journal of Nutrition and Health
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• 제49권2호
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• pp.88-98
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• 2016

본 연구에서는 20대 초반 한국 여성의 짠맛 역치 및 선호도를 측정하여 음식섭취빈도법을 통해 추정한 나트륨 섭취량과의 연관성을 분석하고, 자기 평가 짠맛 선호도와 관련되어 있는 나트륨 섭취 관련 식행동과 나트륨 섭취 기여 음식을 조사하였다. 자기 평가 짠맛 선호도는 음식섭취빈도법을 이용하여 추정한 나트륨 섭취량과 유의한 양의 상관관계에 있었으며, 나트륨 증가 식행동과 양의 상관관계에 있었고, 나트륨 감소 식행동과 음의 상관관계에 있었다. 나트륨 섭취와 관련된 식행동 중에는 식탁에서 소금과 양념간장의 사용, 외식과 배달음식의 빈도, 국, 찌개, 국수류의 국물 섭취, 레토르트나 가공 식품의 이용, 생채소의 섭취, 싱거운 맛에 대한 수용태도 등의 항목이 자기 평가 짠맛 선호도와 유의한 관련성이 있었으며 나트륨 섭취 기여음식 중에는 라면, 순두부찌개, 총각김치 및 김치를 이용한 음식 등이 자기 평가 짠맛 선호도와 유의하게 관련되어 있어, 짠맛 선호도가 이들 식행동 및 음식을 통해 높은 나트륨 섭취와 관련되어 있는 것으로 생각된다. 예상과는 달리 짠맛 검출 및 인식 역치는 자기 평가 짠맛 선호도, 나트륨 섭취량, 나트륨 증가 및 감소 식행동과 유의한 상관관계를 보이지 않아 식품체계가 아닌 염화나트륨 수용액을 이용한 짠맛 역치보다는 자기 평가된 짠맛 선호도가 개인의 평상시 나트륨 섭취량을 간접적으로 평가할 수 있는 더 좋은 지표로서 생각된다. 결론적으로, 자기 평가 짠맛 선호도는 나트륨 섭취와 관련된 식행동과의 연관성으로 인하여 평상시 나트륨 섭취 정도를 잘 반영하는 것으로 나타났으며, 개인의 나트륨 섭취 수준을 평가하는 간단하고 효과적인 도구로서 활용될 수 있을 것이다.

• 대한지역사회영양학회지
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• 제19권6호
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• pp.537-549
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• 2014

Objectives: This study was conducted to examine blood pressure and other characteristics of a high sodium intake group assessed with 24-hr urine analysis and the dietary factors related to the risk of high sodium intake among Korean adults. Methods: A cross-sectional study was conducted with adults aged 20-59 years. Subjects who completed 24-hr urine collection (N = 205) were divided into 3 groups (tertile) according to the sodium intake estimated with 24-hour urine analysis. We compared the blood pressure, BMI and dietary related factors of the 3 groups (low, medium, high sodium intake group) with General Linear Model (GLM) and Duncan's multiple range test (p < 0.05). The risk factors related to high sodium intake were assessed with odds ratio (p < 0.05). Results: The sodium intake (mg/day) of the 3 groups were $3359.8{\pm}627.9$, $4900.3{\pm}395.1$ and $6770.6{\pm}873.9$, respectively, corresponding to daily salt intake (g/day) 8.5, 12.4 and 17.2, respectively. High sodium group showed significantly elevated age, BMI and systolic/diastolic blood pressure. Being male gender was associated with significantly increased risk of sodium intake (OR = 1.972; 95%CI: 1.083-3.593). The other factors related to high sodium intake were higher BMI (${\leq}25$) (OR = 2.619; 95% CI: 1.368-5.015), current alcohol consumption (OR = 1.943; 95%CI: 1.060-3.564), and having salty soybean paste with salt percentage > 14% (OR = 3.99; 95% CI: 1.404-6.841). The dietary attitude related to increased risk of high sodium intake included 'enjoy dried fish and salted mackerel' (p < 0.001) and 'eat all broth of soup, stew or noodle' (p < 0.001). Conclusions: Because high sodium intake was associated with higher blood pressure, nutrition education should focus on alcohol consumption, emphasis on related dietary factors such as using low salt soybean paste, improvements in the habit of eating dried fish and salted mackerel or eating all broth of soup, stew or noodle.

• 한국식품조리과학회지
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• 제28권5호
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• pp.515-530
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• 2012

This research aims to audit foodservice sanitation management practices and to assess microbiological quality of foods and their food contact environments in kindergartens. Sanitation auditing was conducted in 10 kindergartens in Seoul, Gyeonggi, and Incheon areas to assess the levels of safety practices. Results revealed that the surveyed kindergartens scored 41.4 out of 100 points, on average. The average scores of each category were 6.4/11 (58.1%) for facilities sanitation, 4.2/12 (35.0%) for equipment sanitation, 2.4/10 (24.0%) for personal hygiene, 5.1/10 (51.0%) for food ingredients management, 6.0/17 (35.3%) for production process, 5.4/10 (54.0%) for environmental sanitation, 2.0/6 (33.3%) for kitchen utensils sanitation, and 2.2/6 (96.7%) for safety management. Microbiological quality of raw, prepared foods, personal sanitation (hands), environmental sanitation, and drinking water were assessed. Total plate counts (TPC) of the following menus exceeded the critical limit: seasoned leek (5 log CFU/g), cucumber (5.0 log CFU/g), panbroiled fish paste (TNTC at $10^4$), tangpyeongchae (5.3 log CFU/g), egg rolls (6.1 log CFU/g), panbroiled sausage (TNTC at $10^4$), and soft tofu pot stew (TNTC at $10^4$). Coliform which exceeded the standard limit were detected from seasoned leek (2 log CFU/g), cucumber (2.5 log CFU/g), panbroiled fish paste (2.0 log CFU/g), egg roll (3.8 log CFU/g), tangpyeongchae (4.0 log CFU/g), panbroiled sausage (2.3 log CFU/g), and soft tofu pot stew (3.7 log CFU/g). For seasoned foods (muchim), S. aureus ranged 2.2~2.9 log CFU/g. In food workers' hands, microbial profiles ranged 3.8~7.9 log CFU/hand for TPC, ND~4.5 log CFU/hand for coliforms, ND~4.7 log CFU/hand for S. aureus, and ND~5.3 log CFU/hand for Enterobacteriaceae. Microbiological profiles of food contact surface of knives, cutting boards, dish-clothes, and trays showed possibilities of cross-contamination. General bacteria were 2.1~4.5 logCFU/ml in 4 purified water samples and E. coli were found in the kitchen of one kindergarten. These results suggested that environmental sanitation management practices need more strict improvement: effective sanitation education methods and practices were strongly required, and more strict sanitation management for cooking utensils and equipment were required.

• 한국가정과학회지
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• 제5권1호
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• pp.71-84
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• 2002

The purpose of this study was to investigate food habits of boy students and to know the difference in food habits between boy and girl students. A previous study had been conducted to girl students in 1998 and this study was carried to boy students in Oct. 2000 using the questionnaires. The subjects were 783 boy students in middle school, high school and university students living in Jeonbuk region. The average score of food habits was $4.09{\pm}1.72$ out of a possible 10(middle school students were $4.96{\pm}1.85$, high school students were $4.17{\pm}1.61$ and university students were $3.15{\pm}1.70$). The average is similar $4.11{\pm}1.63$ to girl students in 1998. The correlation coefficient between the score of food habits and standard of living, present residence, taking nutritional supplements, and sort of school was positive. As a staple food, cooked rice was preferred 95.9% of subjects and this result is similar to girl students of previous study. The most preferred side-dishes was different between girl and boy students. Boy students liked stew the best, but girl students liked Kimchi the best. The most preferred snacks was fruits and fruit juice. The portion of eating cooked rice in boy students (87.8%) was decreased than girl students(90.6%) at breakfast. The main meal to have soup & stew was supper and the most delicious meal was also supper, but primary meal skipped was breakfast. The reasons for skipping breakfast were lack of time(38.7%) and no appetite(17.6%), skipping lunch was missing a time to eat(8.4%), and skipping supper was no appetite(10.5%). Substitution food on no preparation of lunch basket was difference between middle and high school students and university students. Middle and high school students ate noodles and university student ate cooked rice. The preference of snack was that chicken(20.3%) was the best. The time of eating snacks was that anytime(38.6%) was the first, after supper(13.7%) was next. In order to improve the nutritional status of boy students, they must establish good food habits by eating three regular meals per day and balancing their diet. Especially university student must build their regular life style, so they would have three regular meals.

• 동아시아식생활학회지
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• 제7권3호
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• pp.341-354
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• 1997

The purpose of this study was to investigate the food behaviors and food preferences of teenagers by regional groups. The subjects were composed of 365 third grade students in middle schools from urban, rural and fishing areas in Kyungpook province. The data was collected by using a survey questionnaire. The results of the study are summarized as follows: Eating habits of 21-47% of the subjects, according to the regions, were poor and female students in large city showed the best eating habits while female students in fishing village showed the poorest eating habits. Out of the three regional groups studied, the subjects from the fishing villages had the highest rates of skipping meals and eating between meals. Out of all the people investigated, thirty to forty percent had unbalanced diets, the highest percentage coming from the urban areas and the lowest from the fishing villages. All together an allergic reaction to food was the highest in the fishing villages' subjects and female students were more sensitive compared to the male students. Students from the urban area had higher frequency of symptoms of lactose intolerance. Upon the investigation of the subjects 'food preferences, they preferred boiled rice to any other rice as a staple food. Cha jang myun was the most preferred out of all noodles and breads. It was found that teenagers preferred one course meal such as fried rice to a rice-centered regular meal. Out of all various meat soups, beef soup and beef-rib soup were preferred the most. As for subsidiary foods the most preferred were soybean paste stew and cuttlefish stew which they ate daily. There was a very high preference for fried foods, the most favored being pork cutlet followed by fried vegetables, sweet potatoes, and minced meat. The most preferred cooked vegetables were bean sprouts and seasoned cucumber. Seasoned cubed radish roots were the most preferred kind of kimchi. For desserts there was a very high preference for the following fruits: apples, plums, strawberries, and oranges. For beverages the most popular choice were chocolate drinks followed by orange juice, apple juice, milk and tomato juice. According to these investigations, most teenagers liked daily foods which they are used to. The study showed that on the whole the teenagers had poor eating habits. A problem that needs immediate attention is that female students and students from the fishing villages have a high rate of skipping meals. It is expected that the results of this food preference test of teenagers could be useful in the meal planning of middle school lunch programs in the future.