• 터널과지하공간
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• 제28권6호
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• pp.547-554
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• 2018

크라우드소싱을 활용한 센서 자료 수집은 기존의 방식으로 얻기 어려운 고밀도 지반 진동 정보의 수집이 가능하다. 본 연구에서는 스마트폰과 같은 소형 전자기기에 탑재된 MEMS 센서를 활용한 크라우드소싱 방식 지반 진동 수집 시스템을 개발하였으며, 이를 위한 기반 체계 설계 및 클라이언트와 서버에 대한 구현을 수행하였다. 해당 시스템은 Android 기반의 스마트폰이나 Android Things 기반의 고정식 장비를 통해 진동 데이터를 신속히 수집하면서 하드웨어의 전력 및 데이터 사용량을 최소화할 수 있도록 설계되었다.

• 정보보호학회논문지
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• 제25권5호
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• pp.1143-1151
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• 2015

Extensible Storage Engine (ESE) 데이터베이스는 Microsoft가 개발한 데이터베이스로 Internet Explorer, Spartan과 같은 웹브라우저와 Windows Search, System Resource Usage Monitor와 같은 윈도우 시스템에서 주요하게 사용된다. 기존의 ESE 데이터베이스 뷰어는 잘못된 값을 출력할 수 있고 수집 환경과 파일의 상태에 따라 파일을 읽지 못하는 경우가 존재한다. 또한 삭제된 레코드 복구 도구는 일부 프로그램에 한정적이고 모든 테이블을 복구하지 못한다. 본 논문에서는 ESE 데이터베이스 구조를 분석하여 개별 데이터베이스가 아닌 범용적으로 적용할 수 있는 삭제된 레코드의 복구 기법을 제안하며 이를 도구로 구현하여 실험한 결과를 제시한다.

• 한국식생활문화학회지
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• 제25권2호
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• pp.150-159
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• 2010

We surveyed 848 university students, $21.4{\pm}2.5$ years of age, attending university in Seoul, Kongju, Chongyang-Gun in the Chungnam province of Korea, for their use of health functional foods (HFF) and for significant variables in this use, namely demographic characteristics, health related variables, dietary variables and nutritional beliefs. The prevalence of the use of HFF was 33.6%. Among all types of HFF, nutritional supplements were taken most frequently, followed by (in order) red ginseng products, apricot extract products and ginseng products. HFF use was higher in females (p<.05), in subjects living in a dormitory (p<.05) and those from families with a relative high socioeconomic status (p<.001). Self-health concern (p<.05) and usage ratio of HFF by family (p<.001) was higher in users than in nonusers of HFF. The total score of dietary assessment was higher in users than in nonusers of HFF (p<.001), and users had a more positive point of view concerning the potential health benefits of HFF than did nonusers (p<.001). Most users took HFF when they were healthy (37.2%) or when they were sick (27.4%). They did not feel special effects through the HFF use (49.8%). Most users got the information about the specifics of HFF from family and/or relatives (55.8%). Most of users confirmed nutrition facts when they purchased the HFF (70.9%), but a considerable number of users could not understand these nutrition facts (48.1%). Users preferred vitamin C- and Ca-supplements most among vitamin mineral supplements belonged to HFF. These results show that the use of HFF is common among university students. As well, the use of HFF by students is affected by various variables. Supplementary nutritional education should be undertaken among university students, in order to give them a reasonable guideline for the use of HFF, based upon influencing factors and usage behaviors that we learned from this survey.

• Journal of Nutrition and Health
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• 제43권3호
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• pp.294-303
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• 2010

Various types of health functional foods (HFF) are popularly used among middle-aged. We surveyed 946 middle-aged in Korea for HFF use and significant variables for their HFF use including demographic characteristics, health related variables and nutritional beliefs. The use prevalence of HFF was 58.9%, and among all types of HFF, red ginseng products were taken most frequently, followed by nutritional supplements, ginseng products > mushroom products. HFF was taken more frequently in subjects from high monthly family income (p < .001), and in those from families with a high socioeconomic status (p < .001) in comparison to each corresponding group. Mean age of users was higher than nonusers (p < .001). Self concern about health (p < .001) and usage ratio of HFF by family (p < .001) were higher in users than in nonusers of HFF. Total dietary assessment score was not different in two groups, and users had a more positive view concerning the potential health benefit of HFF than nonusers (p < .001). Most users of HFF took HFF when they were healthy (52.8%) and experienced a little effect through the HFF use (51.2%). Most users of HFF obtained the information on HFF through family and relatives (30.5%) and most of them purchased HFF at pharmacy or oriental medicine clinics (44.5%). HFF users preferred multivitamin and Ca-supplements most among the vitamin mineral supplements belonged to HFF. Given the widespread use of HFF and inappropriate usage of HFF among subjects, the proper use of these products for the contribution to their optimal nutrition and overall health is a subject that should be formed through practical nutrition education considering the various variables affecting their HFF use.

• 보건교육건강증진학회지
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• 제22권4호
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• pp.1-16
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• 2005

Objectives: This study was conducted to identify the computer game usage of elementary school children and their needs for education on the prevention of computer game addiction. Methods: The subjects of this study were 455 elementary school children. The data were collected from an open and structured questionnaire on the subjects' computer game usage and their needs for education on the prevention of computer game addiction. Results: The boys played computer games more than the girls. There were statistical differences in the durations of the computer game use, the main locations of the computer games they played, the times of the day when they used computers, the times of the day when they played computer games, the number of times in a week they visited Internet cafes, what motivated them to play computer games, and their partners in playing computer games according to gender. From an analysis of 714 statements of the subjects with respect to their need to be educated on computer game addiction prevention, six domains and 19 themes were drawn. The six main domains identified were Definition & Status, Etiology & Process, Influences, Prevention, Diagnosis & Coping with Computer Game Addiction, and General Information on Computer Games. This study results revealed that elementary school children have to be comprehensively educated on how to prevent computer game addiction. Conclusion: A computer game addiction prevention program concerning these themes and domains must be developed. A study should also be conducted to identify the educational needs of parents of elementary school children on computer game addiction prevention.

• 한국농공학회논문집
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• 제64권2호
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• pp.27-35
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• 2022

Based on the current status of groundwater usage in the dry season through field surveys, this study tried to suggest countermeasures to reduce groundwater usage and to improve the water quality of baseflow from agricultural fields. For this purposes, basins with water curtain cultivation preceded were targeted where decreases of groundwater due to continuous use of groundwater in spring and winter annually observed. From monitoring groudwater usage of the study watershed, 130,058, 130,105 m³/day of water was pumped in during the water curtain cultivation period (October-February) in the Shindun, Seokwon watershed respectively. And the pilot application of the smart automated sensor-based water curtain cultivation system (smart WC system) developed in this study to reduce groundwater consumption has been conducted. As a result, the efficiency of the smart WC system when threshold temperature is set as 6.3 ℃ was 21.1% compared to conventional cultivation and efficiency increased as threshold temperature gets lower. Lastly, in this study, culvert drainage and Bio-filters were installed and rainfall monitoring was performed 15 times in order to analyze the baseflow securement and pollutant loads behavior. As a result, the test-bed with culvert drainage and Bio-filter installed together generated 61.4% more baseflow (4.974 m³) than the test-bed with only culvert drainage was installed (3.056 m³). However, the total pollutant load of all water quality contents (BOD, COD, T-N, TOC) except for the SS and T-P was found to be greater in the culvert drain and Bio-filter installed than in the culvert drain test-bed.

• 보건교육건강증진학회지
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• 제24권2호
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• pp.15-28
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• 2007

Objectives: In this paper, the survey on internet usage patterns of health consumers was conducted and analyzed in order to determine internet health information assessment criteria for providing correct consumer health information on web-sites. Methods: By using a survey questionnaire with 16 questions on general information and 20 questions on internet health information, data were collected from September 16 to 25, 2005 from 476 participants through an internet web site, http://www.hp.go.kr. Frequency analysis, t-test, and multiple regression were used in order to analyze the difference in assessment criteria, factors influencing assessment criteria, factors influencing user satisfaction, etc. Results: General characteristics of the study population were: the persons over age 40 were the smallest age group; women were accounted for 74.2%; and the persons with average income were the largest income group; and the persons with average health status were the largest health group. Most widely used health information were: exercise, disease, and diet, in order. There was significant difference(p=.001) in importance of assessment criteria between the persons in medical institutions and the persons not in medical institutions. There was no significant difference in other assessment criteria. We also found that contents of websites and easy to use were more important factors than elucidation of information providers and information sources including speciality of information in quality assessment criteria of internet health information. Discussion and Conclusion: Results of this paper were compared with the previous studies from the literatures. Contrary to the previous studies in the literature, there was significant difference in importance of assessment criteria between the persons in medical institutions and the persons not in medical institutions. In order to apply the study results to develop health contents for consumer, there is a need for further upgrade the proposed assessment criteria based on expert opinion.

• 한국도서관정보학회지
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• 제49권1호
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• pp.47-75
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• 2018

본 연구는 국립중앙도서관에서 제공하고 있는 근대문학서비스의 이용현황 및 만족도를 조사하고, 이를 기반으로 서비스를 활성화 시킬 수 있는 방안을 이용자의 요구를 기반으로 모색해 보고자 하였다. 그 결과, 이용자의 근대문학 서비스에 대한 이용률은 매우 저조한 것으로 나타났고, 이용경험자의 이용만족도는 보통으로 나타났다. 따라서 이용률과 만족도를 높이기 위해서는 첫째, 현재 제공되고 있는 근대문학 서비스에 대한 적극적인 홍보가 요구된다고 할 수 있다. 둘째, 전시 및 관람 정보에 대한 홍보는 근대문학자료 이용자로의 직접적 발로를 제공하고 있으므로 다양한 형태의 전시, 관람 행사의 진행이 필요한 것으로 보였다. 셋째, 응답자들은 도서관 홈페이지, 포털사이트, SNS 등 온라인을 통한 홍보 매체가 효과적인 홍보방법이라고 하였으나, 저학력과 고연령층에서는 오프라인 매체를 통한 홍보방법을 선호하고 있어 홍보매체의 선정에 있어 심도 깊은 논의와 고민이 필요할 것으로 보인다.

• 한국산업정보학회논문지
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• 제22권4호
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• pp.11-18
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• 2017

본 논문은 소비자에게 공급되는 수돗물의 공급시설(Water Supply Network)에 IoT 기술을 활용하여 소비자의 물 사용량을 원격으로 검침하고, 공급시설의 누수를 줄여서 원가를 절감하는 스마트 물관리(Smart Water Management) 기술의 적용효과를 검증하였다. SWM 실증모형은 수돗물 공급시설에 원격 누수감지센서, 스마트 미터링(Smart Metering), 초소형 멀티센서를 설치하고, 원격에서 운영현황을 실시간으로 감시하고 소비자에게 수돗물 사용량과 수질을 스마트폰 앱으로 제공하였다. 이때, 소비자가 수돗물 사용량 정보를 이용하여 수돗물을 아껴 쓰는지, 수돗물 수질정보를 이용하여 직접 음용하는지를 조사하였다. 특히, 본 연구에서는 SWM을 실증 적용함으로써 공급시설의 유수율 향상, 수돗물 음용률 향상, 소비자 민원 감소, 운영비용 절감, 수돗물 사용량 절감이 달성되는지를 검증하는데 목적이 있다. 또한 수돗물 공급시설의 IoT 센서, 운영자 모니터링 시스템, 이상발생시 탐사복구 솔루션이 융합된 하나의 SWM 모델을 수립하였으며, 관련 기술 개발을 통해 국내 물산업을 육성하고, SWM을 선진수준으로 확산하였다는데 의의가 있다고 하겠다.

• 한국조사연구학회지:조사연구
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• 제12권3호
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• pp.123-142
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• 2011

본 연구는 부모들의 사회경제적 지위와 청소년들의 교육열망이 청소년들의 인터넷 이용에 미치는 영향을 분석하였다. 최근의 정보격차 관련연구들은 다양한 속성에 따른 구체적인 인터넷 이용형태의 차이에 관심을 가지고 있다. 이러한 연구에 입각하여 본 연구는 부모의 사회경제적 지위에 따른 청소년들의 인터넷 이용형태의 차이가 세대간 불평등의 재생산기제로 작동할 수 있다는 가능성에 주목하여, 부모의 지위에 따른 청소년의 인터넷 이용형태의 변이 원인을 교육열망의 기제를 중심으로 탐색하고자 하였다. 청소년패널조사(KYPS)를 무작위효과모형 (random effect model)을 통해 분석한 결과는 다음과 같다. 부모의 사회 경제적 지위가 높 수록, 정보지향적 인터넷 활동빈도는 증가하고, 오락지향적 인터넷 활동빈도는 감소한다. 청소년의 높은 교육열망 역시 정보지향적 이용을 증가시키고, 오락지향적 이용을 감소시킨다. 교육열망의 매개효과는 정보지향적 이용에서 더욱 뚜렷하며, 교육열망의 효과는 청소년의 연령이 높아질수록 증가하는 경향이 있다. 연구의 함의와 한계가 결론에서 논의되었다.