• 대한영양사협회학술지
• /
• 제24권4호
• /
• pp.344-360
• /
• 2018

This study examined the sociodemographic factors, health-related habits, chronic diseases, dietary habits, and nutrient intake according to the self-rated health status in a group aged over 65 years by analyzing the nationally representative Korean survey data. A total of 1,510 subjects were analyzed among the participants of the 2016 Korean National Health and Examination Survey (KNHANES). Statistical analyses for complex samples were performed using the SPSS software package (version 19.0) The study subjects were divided into two groups (healthy group vs. unhealthy group) based on their self-rated health status. The percentage of the healthy group was 66.5%. Gender, age, education level, household income, job (P<0.001, respectively), marital status, and basic living allowance (P<0.05, respectively) were significant sociodemographic variables of the self-rated health status. Alcohol consumption (P<0.01), aerobic physical activity, stress, quality of life, not feeling very well, depression and activity restriction (P<0.001, respectively) were also significant health-related variables of the self-rated health status. Blood glucose, anemia (P<0.05, respectively), and chewing problems (P<0.001) were significant chronic disease-related variables of the self-rated health status. Adequate intakes of protein, dietary fiber, phosphorus, thiamin, niacin, vitamin C (P<0.001, respectively), calcium, sodium, potassium (P<0.01, respectively), iron, vitamin A, and riboflavin (P<0.05, respectively) were also significant variables of the self-rated health status. In complex samples multiple logistic regression analysis, the self-rated health status was influenced significantly by the aerobic physical activity (P<0.01), stress level (P<0.05), depression (P<0.001), quality of life (P<0.001), not feeling very well (P<0.001), activity restriction (P<0.001), chewing problem (P<0.05), and adequate intake of iron (P<0.05). These results suggest that activity restriction, mental health, adequate iron intake, and physical activity may be associated with the self-rated health status in the elderly.

• Steel and Composite Structures
• /
• 제18권3호
• /
• pp.583-601
• /
• 2015

In the present study, the combined effects of thermal and mechanical loadings on the interlaminar shear stresses of both moderately thin and thick composite laminated beams are numerically analyzed. The finite element modelling of laminated composite beams and analysis of interlaminar stresses are performed using the commercially available software package MSC NASTRAN/PATRAN. The validity of the finite element analysis (FEA) is demonstrated by comparing the experimental test results obtained due to mechanical loadings under the influence of thermal environment with those derived using the present FEA. Various parametric studies are also performed to investigate the effect of thermal loading on interlaminar stresses generated in symmetric, anti-symmetric, asymmetric, unidirectional, cross-ply, and balanced composite laminated beams of different stacking sequences with identical mechanical loadings and various boundary conditions. It is shown that the elevated thermal environment lead to higher interlaminar shear stresses varying with the stacking sequence, length to thickness ratio, ply orientations under identical mechanical loading and boundary conditions of the composite laminated beams. It is realized that the magnitude of the interlaminar stresses along xz plane is always much higher than those of along yz plane irrespective of the ply-orientation, length to thickness ratios and boundary conditions of the composite laminated beams. It is also observed that the effect of thermal environment on the interlaminar shear stresses in carbon-epoxy fiber reinforced composite laminated beams are increasing in the order of symmetric cross-ply laminate, unidirectional laminate, asymmetric cross-ply laminate and anti-symmetric laminate. The interlaminar shear stresses are higher in thinner composite laminated beams compared to that in thicker composite laminated beams under all environmental temperatures irrespective of the laminate stacking sequence, ply-orientation and boundary conditions.

• 한국융합학회논문지
• /
• 제8권6호
• /
• pp.311-323
• /
• 2017

본 연구는 2014년도에 질병관리본부가 직접 자료 수집한, 제6기 국민건강영양조사의 2차 년도 원시자료를 이용한 2차 분석연구로, 본 연구의 목적은 도시와 농촌의 골관절염 환자의 건강관련 삶의 질에 영향을 미치는 요인을 비교하기 위함이다. 연구대상자는 50세 이상 골관절염 환자 599명이다. 연구결과, 도시 골관절염 환자 건강관련 삶의 질에 영향을 미치는 요인은 의료보장형태, 무릎관절통, 무릎강직, 엉덩관절통, 요통, 활동제한, 주관적 건강상태로 나타났다. 반면 농촌 골관절염 환자 건강관련 삶의 질에 영향을 미치는 요인은 무릎관절통, 활동제한, 음주로 나타났다. 연구결과를 바탕으로, 도시와 농촌의 골관절염 환자에게 공통적으로 접근할 수 있는 중재전략과 차별화 할 중재 전략을 구분하여 골관절염 환자에 대한 지역사회 재활 프로그램 및 건강관련 삶의 질 증진 방안을 마련하여야 할 것이다.

• 한국통신학회논문지
• /
• 제11권2호
• /
• pp.108-121
• /
• 1986

音聲과 데이터가 集積된 패킷 通信網의 性能을 豫測하고 시스템 파라메터를 最適化하기 위한 시뮬레이터의 개발에 관하여 記述하였다. 具現된 시뮬레이터는 CCITT의 勸告事項에 따라 運用되는 데이터 터미널이나 host는 물론 패킷 音聲터미널도 연결가능한 音聲 및 데이터集積通信網의 性能을 여러 상황에서 豫測할 수 있다. 시뮬레이션 技法으로는 지금까지 알려진 세가지 discrete event 시뮬레이션 技法 중 process interaction 方法이 사용되었는데 이 方法을 사용하면 실제 시스템과 가장 비슷한 시뮬레이터를 具現할 수 있다. 시뮬레이터는 약 4,000line의 GPSS 시뮬레이션 언어와 PL/I으로 具現되었다. 시뮬레이터의 컴퓨터 run time을 줄이기 위하여 GPSS의 LINK block을 사용함으로써 條件的 event의 數를 줄이는 方法을 사용하였다. 구현된 시뮬레이터를 사용하여 7-node 通信網의 性能을 豫測하였다. 또 개발된 시뮬레이터의 妥當性을 檢證하기 위하여 간단한 音聲과 데이터 multiplexer를 시뮬레이션 모델로 구성한 뒤 그 시뮬레이션 결과를 解釋的 방법에 依한 결과와 比較하였다.

• 대한가정학회지
• /
• 제37권11호
• /
• pp.139-156
• /
• 1999

Food choice is influenced by many factors including physical, social, psychological and food technological developments. This research is based on the survey on Puchon housewives dietary culture according to season and special occasions and the current consumption pattern of traditional fermented foods. The objective is to find out the current consumption and to use this data as the principal element needed to explore changes in consumption patterns and to uphold and develop the consumption of traditional fermented food. Questionnaires were collected 282 housewives in Puchon city. Data were analysed with SAS software package for t-test, F-test and Duncan’s multiple range test. Results of relationship between dietary culture of Puchon housewives and consumption patterns of traditional fermented food items; 1. If we look at seasonal foods, Puchon housewives responded that they normally prepare traditional foods for such special occasions as Chusok(89%), New Year(84%) and January full moon Day(77%). For family celebrations, they cook on their in-laws birthdays(91%), their husbands birthday(84%), childrens birthdays(73%) and their own birthday(32%). They also responded that they eat out on their own birthday(41%), on Christmas Day(19%), on childrens birthdays(17%) and on their husbands birthday(11%). 2. If we look at the age of housewives and their dietary culture, more young housewives tend to eat out on their own, their husbands and their childrens birthdays. As for their educational background, less educated housewives tend to prepare flood at home on New Years Day, while more educated housewives would eat out on their own birthdays. As for the type of family, mere housewives in nucleus families eat out on Christmas Days compared to those in extended families. Also, those in extended families tend to make food at home rather than eating out on their own birthdays. In case of the husbands birthday, there was some difference according to family income (p<0.03).

• 대한가정학회지
• /
• 제38권12호
• /
• pp.29-45
• /
• 2000

The purposes of this study were to determine what factors influence risk perceptions of females and males for milk produced using food-related biotechnology, to test whether risk perceptions or other factors influence self-protection actions and to estimate milk demand response in light of self-protection actions and other economic and demographic factors. The expected utility model was applied to explain the way consumers would take self-protection actions regarding risk perceptions and to drive milk demand. Telephone interviews were conducted and the data were collected from households(females=1,029, males=437) nationwide in the U.S. And the data were analyzed by Heckman two-step method using the software package LIMDEP. Risk perceptions were found to be influenced not by demographic factors but by outrage factors as well as attitudinal factors in both females and males, although some factors were different. In addition, risk perceptions and labeling availability were found to significantly influence self-protection actions in both groups. Furthermore, as an important concern in this study, self-protection action was found to significantly influence milk demand in only male group, implying a consistent behavior of males. Also milk price and household size were found to significantly influence milk demand in both groups. In fact, the results did demonstrate that labeling availability significantly influenced self-protection actions. That is, in markets where labeled laternatives were present, concerned consumers were more likely to self protect by substituting to these products. A policy implication of this result is that labeling food products produced using biotechnology enhances consumer choice. Hence, consumer could express a more accurate demand response and reduce the perceived food safety risk. Furthermore, education for females might be necessary to have a consistent behavior because self-protection action did not significantly influence female's milk demand, though they have greater risk perceptions than males have.

• 한국정보통신학회논문지
• /
• 제8권4호
• /
• pp.846-853
• /
• 2004

본 논문에서는 Communication networking 개선을 위한 트래픽분산 시스템구현을 위한 2개의 패키지（패킷 캡춰와 라운드로빈 테스트 패키지）를 구현하였으며, 이러한 구현 패키지 S/W에 의해 본 연구실험의 가상연결구조(데이터 생성기, 가상서버, 서버1,2,3) 에서 발생하는 패킷의 량을 측정하였다. 즉, 각 서버1,2,3에 트래픽 분산여부를 파악할 수 있었으며, 구현된 트래픽 분산 시스템의 기능으로는 데이터의 수신량, 패킷량 표현, 패킷량 그래프 표현, 라운드 로빈 테스트, 시스템 모니터링기능이 있다. 본 구현시스템을 통한 실험결과, 들어오는 데이터의 크기가 많이 차이나지 않는 이상 라운드 로빈 알고리즘은 확실한 형태의 트래픽 분산을 가능하게 해주었다. 그리고 일부분에서 오차가 심한경우도 있지만 횟수를 거듭하고 테스트가 장기화 될수록 오차는 현저히 줄어들었다.

• 한국정보통신학회논문지
• /
• 제14권2호
• /
• pp.485-492
• /
• 2010

본 연구는 모바일 기기 상에서 애플리케이션 작성 시 GUI를 지원하는 윈도우 기반의 컴포넌트 패키지 소프트웨어 모듈인 WFC에서, 보다 다양한 콘텐츠의 표현과 조작을 지원하기 위한 포커싱 가능한 테이블 컴포넌트를 제안한다. 모바일 기기의 특성상 작은 디스플레이에서 테이블 특성을 가지는 콘텐츠의 표현은 쉽지 않다. 자바와 같은 관련 연구들에서 몇 가지 방법들이 제안되었으나, 이들은 모바일 기기의 특성을 고려하여 제안된 것들은 아니다. 본 연구에서는 모바일 기기의 디스플레이상에서 테이블 특성을 가지는 콘텐츠의 알맞은 출력을 지원하고, 사용자가 지정하는 콘텐츠에 포커싱 조작이 가능하게 함으로써, 일반적인 테이블에 비해 보다 폭넓은 표현을 제공하는 확장된 테이블 컴포넌트를 설계하고 구현한다. 또한, GUI 관점에서 성능 평가를 위해 제안된 컴포넌트와 자바 Swing의 JTable과의 비교를 제시한다.

• 한국정보통신설비학회:학술대회논문집
• /
• 한국정보통신설비학회 2008년도 정보통신설비 학술대회
• /
• pp.262-267
• /
• 2008

Recently, landslides frequently occur on natural slope and/or man-made cut slope during periods of intense rainfall. With a rapidly increasing population on or near steep terrain, landslides have become one of the most significant natural hazards. Thus, it is necessary to protect people from landslides and to minimize the damage of houses, roads and other facilities. To accomplish this goal, many landslide monitoring systems have been developed throughout the world. In this paper, a simple landslide detection system that enables people to escape the endangered area is introduced. The system is focused on the debris flows which happen frequently during periods of intense rainfall. The system is based on the wireless sensor network (WSN) that is composed of wireless sensor nodes, gateway, and remote server system. Wireless sensor nodes and gateway are deployed by commercially available Microstrain G-Link products. Five wireless sensor nodes and one gateway are installed at the test slope for detecting ground movement. The acceleration and inclination data of test slope can be obtained, which provides a potential to detect landslide. In addition, thresholds to determine whether the test slope is stable or not are suggested by a series of numerical simulations, using geotechnical analysis software package. It is obtained that the alarm should be issued if the x-direction displacement of sensor node is greater than 20mili-meters and the inclination of sensor node is greater than 3 degrees. It is expected that the landslide detection method using wireless senor network can provide early warning where landslides are prone to occur.

• 한국도로학회논문집
• /
• 제9권4호
• /
• pp.75-82
• /
• 2007

본 연구에서는 다차로 고속도로에서 트럭주행 차로를 제한하는 전략이 교통류 변수(평균속도, 차선변경 횟수, 총교통량의 변화)에 어떤 영향을 미치는 지를 알아보았고, 또한 본 연구에서 제안된 트럭주행 차로를 제한하는 전략에 대한 대안들의 적용 타당성을 알아보았다. 교통 시뮬레이션을 위해 두 가지 형태의 가상 네트워크와 교통수요를 설정했으며, 트럭 차량의 주행을 제한하는 차로의 수에 근거하여 3가지 실행가능한 시나리오를 설정하였다. PARAMICS 시뮬레이션 모형이 주요 분석 Tool로 사용되었다. 통계분석을 통해 시나리오에 따른 교통류 변수에 대한 영향을 분석하였다. 결과적으로, 트럭주행 차로를 제한하는 전략은 다차로 고속도로에서 교통류의 흐름에 긍정적인 영향을 미치는 것으로 나타났다. 또한, 이 연구는 트럭 주행 차로를 제한하는 전략이 성공적으로 시행되기 위해 트럭 차량의 주행을 제한하는 차로의 수의 결정이 중요한 요소가 될 수 있다는 것을 보여주었다.