• Animal Bioscience
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• 제36권5호
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• pp.810-817
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• 2023

Objective: The aim was to compare the behavioral response to full separation of cows and calves maintained together for 100 days or 24 h. Methods: Twelve Holstein-Friesian cow-calf pairs were enrolled into either treatment or industry groups (n = 6 cow-calf pairs/group). The treatment cows and calves were maintained on pasture together for 106±8.6 d and temporarily separated twice a day for milking. The Industry cows and their calves, were separated within 24 h postpartum. Triaxial accelerometer neck-mounted sensors were fitted to cows 3 weeks before separation to measure hourly rumination and activity. Before separation, cow and calf behavior was observed by scan sampling for 15 min. During the separation process, frequency of vocalizations and turn arounds were recorded. At separation, cows were moved to an observation pen where behavior was recorded for 3 d. A CCTV camera was used to record video footage of cows within the observation pens and behavior was documented from the videos in 15 min intervals across the 3 d. Results: Before separation, industry calves were more likely to be near their mother than Treatment calves. During the separation process, vocalization and turn around behavior was similar between groups. After full separation, treatment cows vocalized three times more than industry cows. However, the frequency of time spent close to barrier, standing, lying, walking, and eating were similar between industry and treatment cows. Treatment cows had greater rumination duration, and were more active, than industry cows. Conclusion: These findings suggest a similar behavioral response to full calf separation and greater occurrence of vocalizations, from cows maintained in a long-term, pasture-based, cow-calf rearing system when ompared to cows separated within 24 h. However, further work is required to assess the impact of full separation on calf behavior.

• Safety and Health at Work
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• 제7권1호
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• pp.63-71
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• 2016

Background: Construction painters have not been studied well in terms of their hazards exposure. The objective of this study was to evaluate the exposure levels of total volatile organic compounds (TVOCs) for painters in the construction industry. Methods: Activity-specific personal air samplings were carried out in three waterproofing activities [polyurethane (PU), asphalt, and cement mortar] and three painting activities (epoxy, oil based, and water based) by using organic-vapor-monitor passive-sampling devices. Gas chromatograph with flame ionization detector could be used for identifying and quantifying individual organic chemicals. The levels of TVOCs, by summing up 15 targeted substances, were expressed in exposure-index (EI) values. Results: As arithmetic means in the order of concentration levels, the EIs of TVOCs in waterproofing works were 10.77, 2.42, 1.78, 1.68, 0.47, 0.07, and none detected (ND) for indoor PU-primer task, outdoor PU-primer task, outdoor PU-resin task, indoor PU-resin task, asphalt-primer task, asphalt-adhesive task, and cement-mortar task, respectively. The highest EI for painting works was 5.61 for indoor epoxyprimer task, followed by indoor epoxy-resin task (2.03), outdoor oil-based-spray-paint task (1.65), outdoor water-based-paint task (0.66), and indoor oil-based-paint task (0.15). Assuming that the operations were carried out continuously for 8 hours without breaks and by using the arithmetic means of EIs for each of the 12 tasks in this study, 58.3% (7 out of 12) exceeded the exposure limit of 100% (EI > 1.0), while 8.3% (1 out of 12) was in 50e100% of exposure limit (0.5 > EI > 1.0), and 4 tasks out of 12 were located in less than 50% of the limit range (EI < 0.5). Conclusion: From this study, we recognized that construction painters are exposed to various solvents, including carcinogens and reproductive toxins, and the levels of TVOC concentration in many of the painting tasks exceeded the exposure limits. Construction workers need to be protected from chemical agents during their painting works by using personal protective devices and/or work practice measures. Additional studies should focus on the exposure assessment of other hazards for construction workers, in order to identify high-risk tasks and to improve hazardous work environments.

• 정보화정책
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• 제24권4호
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• pp.17-43
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• 2017

본 연구의 목적은 OECD PISA 자료를 활용하여 우리나라 학생들의 ICT 접근 및 활용 수준의 변화를 살펴보고 이를 기초로 초 중등학생 ICT 교육의 발전 방향을 탐색하는 것에 있다. 이를 위해, 2009년부터 2015년까지 실시된 OECD PISA 'ICT 친숙도 조사' 공통 문항을 중심으로 우리나라와 OECD 국가 평균의 조사 주기별 추이를 비교 분석하였다. 조사대상은 만 15세 학생이며, 분석 방법은 표집 가중치를 고려하여 각 항목에 대한 응답 비율을 산출하였다. 분석 결과는 다음과 같다. 첫째, 가정에서의 ICT 접근성은 2009년부터 2015년까지 증가하였으나 OECD 평균보다는 지속적으로 낮은 경향을 보였다. 둘째, 인터넷 사용 시간은 OECD 평균보다 낮았으며, 2012년보다 2015년에 주중 인터넷 사용시간은 증가하였으나 주말 인터넷 사용시간은 오히려 감소하였다. 셋째, 학교에서의 ICT 접근성은 2009년부터 2012년까지 감소하다가 2015년에는 증가하는 추세를 보이고 있으나 2015년을 기준으로 OECD 평균보다 낮은 수준을 보였다. 넷째, 학생들의 컴퓨터 최초 활용 나이 비율은 2012년부터 2015년까지 6세 이하를 기준으로 했을 때 증가하는 경향을 보였으나 OECD 평균에 못 미치는 것으로 나타났다. 마지막으로 학생들의 디지털기기 사용은 2012년에서 2015년까지 오락을 위한 인터넷 검색, SNS 활동은 증가폭이 컸으나 이메일, 온라인 채팅, 프로그램 다운로드, 인터넷 뉴스 읽기, 실용적 정보 수집 등 일상적 활용 수준은 오히려 감소하였다. 본 연구는 이러한 결과를 기초로 우리나라 초 중등학생 ICT 교육의 개선을 위한 정책 방안을 제안하였다.

• 수산경영론집
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• 제17권2호
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• pp.65-106
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• 1986

1, The Purpose of Study This is a study on the Evaluation of the operating of Fisheries Extension Services of Korea, for performing the activities such as guiding fisheries technique as well as offering industrial information to the fishermen in fishing village. By doing so, the Fisheries Extension Sevices(FES) can materialize the continued growth of fisheries, the social and economic development of fishing village, and the increase in income by enhancing the knowledge level of Fishermen, etc. In performing fisheries policy, this activity plays a great role on the research and development activity, and it has become practical since 1976 in Korea. In order to meet immediately with the problem of fisheries technical innovation and rapid environmental changes surrounding the fisheries, the fishermen should not only enhance their scientific and comprehensive capacity in fisheries technique but abtain various effective information. Generally, as most of all the fishemen are poor in the managerial structure and scattered in fishing villages, they have little opportunity in the contact of information. As a result, it is nessessary for the FES to perform the fishing business by the extension service officials who has received special training and acquired fisheries know-how in these fields. And yet, FES is under the unfullfilled circumstance in such factors as manpower, technical know-how, equipment, and the service system etc., which is required in promoting the social, economic development of fishing village and in resolving the high technique demand of fisherman. This study on the fisheries extension services have been studied from those backgrounds. 2. Research Method The data of collecting methods which were necessary in carrying out this study was adopted by the questionaire research on the present extension service activity, through the subject of the extension services (driving agency of the work and the officials), the object(fishemen) and the 3rd observers to the extension services (the authorities concerned). The research sample was taken by the sampling extraction of total 1, 774 men from the above 3 groups. And the research was carried out from August, 1986 to October, 1986, supported from the Fisheries Extension Office (FEO) located in field during the research process. In this study, the levels of the extension operating were determined and estimated in accordance with the extension service method, morale of extension service officials and the extension service system, etc. through the collected data of the research questionaire paper. And based on this result, the essential conditions of the extension services were grasped, and also we tried to present the various activity plan necessary to promote the operating of the extension services. The questionaire research data was calculated by the computer center of National Fisheries University of Pusan, and the total result was again tried on the one demension analysis along with two dimension analysis to search out the relativity between the questionaire, and the statistical test was done $\chi$$^2$test in significance level of l~5%. 3. Contents of Study This study consists of 7 chapters and the contents are as follows : Chapter I : The object and method of the study Chapter II : The assessment and analysis of the extension services Chapter III : The contents and method of the extension services Chapter IV : Analysis of the essential conditions for the extension services Chapter V : The evaluation of activities of extension services Chapter Ⅵ : Conclusion.4. Results and RecommendationTherefore, the results of this study estimated by logical process and analysis are as follows : 1) Most of Korean fishing villages and coastal fishermen have shown much concerns about fisheries technique and social changes, thus many of them were confronted with new problems on how to adapt and to meet changes. 2) Majority of fishermen estimated FEO as an organization of specific technologies with all the thing concerning the fisheries technique in general. Therefore the fishermen wanted to utilize the FEO as an adaptable method for the modern fisheries techniques as well as the environmental changes. 3) In contrast with the fast changes of the fisheries technique, the complexity and variety of technical system and the broadness of fishing village and fishermen, it was revealed that the necessary factors such as the facilities, manpower, budget, and the level of applying techniques of the FEO located in field were highly insufficient. Accordingly, the guiding efficiency was low and the extension services did not provide full solution to the various request from fishermen. 4) It is possible to classify the activation factor for the extension service into two large dimension ; personal dimension relevant to guidance officials and work dimension relevant to the organization. And it was found that the activation level of the work dimension was far lower than the personal dimension between them. So, the activation should be done first in the dimesion to promote the activation of the extension services. 5) The extension services officials are now demoralized in general, thus it is necessary to take reality into consideration : the expense of activity, the adequate endowment of activity scope and the reasonable operation of the position class, etc to enhance its morale. However, in order to do the FES activation, first of all, the systems should be established which is lain unsettled stage until now. And there must be change in the understanding of government i.e. the fisheries extension services are the essential policy subject to build up the base of fisheries growth and modernize the fisheries management. And it should be driven positively with the recognition of the "lasting project".g project".uot;.

• 한국산학기술학회논문지
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• 제19권6호
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• pp.324-333
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• 2018

본 연구의 목적은 만성질환인 고혈압, 이상지질혈증, 관절염, 갑상선 질환, 우울증, 아토피, 알레르기, 당뇨병 등의 잠재계층이 어떻게 구성되어 있는지와 유형화된 만성질환의 예측요인을 살펴보고자 하는 것이다. 연구대상은 2014년 국민건강영양조사에 참여한 대한민국 국민으로, 표본추출방법은 층화집락표본추출방법을 사용하였으며 표본 수는 총 7,550명이고, 이를 대상으로 잠재계층분석을 적용하였다. 결과적으로 1 class 유형은 고혈압, 당뇨 그룹으로 고혈압을 앓고 있을 확률이 78.6%이고 당뇨병을 앓고 있을 확률이 34.6%이었다. 2 class 유형은 아토피, 알레르기 그룹으로 아토피를 앓고 있을 확률이 20.3%이고 알레르기를 앓고 있을 확률이 42.2%이었다. 3 class 유형은 이상지질, 관절염, 갑상선질환, 우울증 그룹으로 이상지질 56.1%, 관절염 50.9%, 갑상선 질환 19.4%, 우울증 28.75%로 나타날 확률을 지닌 집단이었다. 4 class 유형은 만성질환을 갖고 있지 않은 정상집단으로 나타났다. 준거변수인 4 class와 1 class를 비교하였을 때, 연령, 운동능력, 자기관리, 비만, 고콜레스테롤 유병여부 등이 유의하게 나타났고, 2 class와 비교하였을 때, 성별, 연령, 교육수준 등이 유의하게 나타났으며, 3 class와 비교하였을 때, 성별, 연령, 통증 및 불편, 고 콜레스테롤 등이 유의하게 나타났다. 결과적으로 세 유형 모두 연령은 복합적인 만성질환을 일으킬 수 있는 요인으로 나타났는데, 이는 질환을 일으킬 수 있는 결정적인 시기가 오기 전에 예방이 중요하다는 것을 의미한다. 따라서 연령에 따른 질병의 유병율 발생 시기를 파악하여 이에 적절한 예방적 노력이 필요하다.

• 디지털융복합연구
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• 제8권2호
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• pp.69-87
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• 2010

이 연구는 한국적 공동체 주거공간 커뮤니티에서 주민들간의 사회적 관계를 유지하고 강화하는데 목적을 둔 친교적 커뮤니케이션 (phatic communication) 활동에 대한 고찰이다. 친교적 커뮤니케이션은 주거공간에서 각종 행사나 모임 취미 등 활동에 주민들이 참여하여 그들의 취향과 기대, 경험의 공통성을 표현하고 공유하면서 공동체를 하나로 묶는 친교적 활동이다. 이런 친교적 활동에서 이루어진 커뮤니케이션의 연령층과 성별, 커뮤니케이션의 주도권, 커뮤니케이션의 시간과 장소선정, 커뮤니케이션의 담론주제와 만나는 목적, 그리고 친교적 커뮤니케이션 참여정도 등을 살펴볼 수 있다. 본 연구의 조사방법은 1차적으로 그들의 민속생활상에 한구성원으로 참여하여 참여관찰과 심층인터뷰를 실시하였다. 이를 더 객관적으로 증명하기 위해 2차적으로 3개 커뮤니티의 주민들 각 150명을 임의할당표본추출하여 설문지에 의한 조사로 자료의 신뢰성을 높였다. 또한 이질적인 이들의 집단에 대하여 그 차이를 검증하기 위해 카이제곱 검증($x^2$; chi-square test)을 실시하였다. 따라서 본 연구는 고맥락 문화권을 지닌 한국적 집단공동체 주거생활공간에서 커뮤니케이션을 바탕으로 한 주민들간의 의미공유, 상호작용, 메시지전달 등 수단으로 공동체를 하나로 묶어주는 한국적 민속생활방식 (a way of life)을 연구함으로써 문화연구 (cultural studies) 에 큰 발전을 가져올 것이다.

• 한국산학기술학회논문지
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• 제11권7호
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• pp.2483-2490
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• 2010

본 연구는 배드민턴 참여자들의 라이프스타일이 스포츠웨어 추구혜택에 미치는 영향을 규명함으로써 배드민턴에 참여하고 있는 동호인들에게 보다 효과적인 스포츠웨어에 대한 정보를 제공하는 연구의 목적이 있다. 본 연구의 대상으로는 현재 강원도에서 배드민턴 클럽에 가입하여 참여하고 있는 성인 남녀를 모집단으로 선정하여 편의추출법에 의하여 총 206명을 표집하여 SPSS/PC+ 11.0 Version을 사용하여 빈도분석, 신뢰도 및 요인분석, 다중회귀분석을 실시하였다. 이 연구의 결론은 다음과 같다. 첫째, 배드민턴 참여자들의 라이프스타일과 스포츠웨어 추구혜택 간의 상관관계가 있는 것으로 나타났다. 둘째, 라이프스타일의 하위요인 패션 유행추구, 사회지향성의 순으로 스포츠웨어 추구혜택인 이상적 추구혜택에 영향을 미치는 것으로 나타났다. 셋째, 라이프스타일의 하위요인 물질추구, 패션 유행추구, 현실만족 순으로 스포츠웨어 추구혜택인 유행과 브랜드 추구혜택에 영향을 미치는 것으로 나타났다. 넷째, 라이프 스타일의 하위요인 자기충실, 사회지향성, 건강추구, 현실만족의 순으로 스포츠웨어 추구혜택인 편안함 추구혜택에 영향을 미치는 것으로 나타났다. 다섯째, 라이프스타일이 패션 유행추구, 물질추구, 사회지향성의 순으로 젊음과 개성 추구혜택에 영향을 미치는 것으로 나타났다. 이러한 결과들을 바탕으로 스포츠활동에 참여하는 대상자들이 스포츠웨어 추구혜택을 정확히 파악함으로써 스포츠활동에 보다 더 질 좋은 스포츠웨어 제품을 기대할 수 있을 것이다.

• 지구물리와물리탐사
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• 제25권3호
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• pp.140-161
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• 2022

탄성파 탐사 자료 획득 시 자료의 일부가 손실되는 문제가 발생할 수 있으며 이를 위해 자료 보간이 필수적으로 수행된다. 최근 기계학습 기반 탄성파 자료 보간법 연구가 활발히 진행되고 있으며, 특히 영상처리 분야에서 이미지 초해상화에 활용되고 있는 CNN (Convolutional Neural Network) 기반 알고리즘과 GAN (Generative Adversarial Network) 기반 알고리즘이 탄성파 탐사 자료 보간법으로도 활용되고 있다. 본 연구에서는 손실된 탄성파 탐사 자료를 높은 정확도로 복구하는 보간법을 찾기 위해 CNN 기반 알고리즘인 U-Net과 GAN 기반 알고리즘인 cWGAN (conditional Wasserstein Generative Adversarial Network)을 탄성파 탐사 자료 보간 모델로 사용하여 성능 평가 및 결과 비교를 진행하였다. 이때 예측 과정을 Case I과 Case II로 나누어 모델 학습 및 성능 평가를 진행하였다. Case I에서는 규칙적으로 50% 트레이스가 손실된 자료만을 사용하여 모델을 학습하였고, 생성된 모델을 규칙/불규칙 및 샘플링 비율의 조합으로 구성된 총 6가지 테스트 자료 세트에 적용하여 모델 성능을 평가하였다. Case II에서는 6가지 테스트 자료와 동일한 형식으로 샘플링된 자료를 이용하여 해당 자료별 모델을 생성하였고, 이를 Case I과 동일한 테스트 자료 세트에 적용하여 결과를 비교하였다. 결과적으로 cWGAN이 U-Net에 비해 높은 정확도의 예측 성능을 보였으며, 정량적 평가지수인 PSNR과 SSIM에서도 cWGAN이 높은 값이 나타나는 것을 확인하였다. 하지만 cWGAN의 경우 예측 결과에서 추가적인 잡음이 생성되었으며, 잡음을 제거하고 정확도를 개선하기 위해 앙상블 작업을 수행하였다. Case II에서 생성된 cWGAN 모델들을 이용하여 앙상블을 수행한 결과, 성공적으로 잡음이 제거되었으며 PSNR과 SSIM 또한 기존의 개별 모델 보다 향상된 결과를 나타내었다.

• 대한가정학회지
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• 제27권2호
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• pp.133-148
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• 1989

This study attempts of analyze empirically the living status of the elderly in Korea by finding out the problems of it in the family and by clarifying the influences of the family environmental variables and the values on the adjustment of the aged. To carryout the aim of this study, the causes and the patterns of the problems for the aged had been found out through the review of literature. Based on them the questionnaire was prepared including the questions of the values, family environmental vriables as well as the degree of satisfaction of thier liver and the extent of life interchange. The former variables were taken as independent and the latter were taken as dependent variables, so that the relationship between the two variables could be exemplified. The 400 aged over 60 living in Seoul and the other cities were selected through the purposive sampling and interviewed. The answers of the 376 respondents, 94% of the sample, were analyzed for this study. The following results have been found out through the various statistical analysis such as frequency distribution, chi-square test, pearson's correlation, analysis of variance and cluster analysis. At first, the results from the examination of the frequency distribution regarding the living status of the aged are; I) sixteen percent of the respondents living with their married offspring were receiving economical support, though they pointed out the problems of the extended family are the inconveniences with their children (60%) and simpleness (20%) of their livers. It seems that the aged in Korea are poor and have negative opinion on the relationship with their offspring even if they live in the same house. Secondly, it has been found out that the family environmental variables, especially such as sex, occupation, residence, education, level, living ability and the family type, play and important role not only on the degree of satisfaction of their liver but also on the extent of interchange of their lives. However, the variables such as religion and whether the spouse is alive or not do not play and important role. Thirdly, the reported main reasons of their delightness were healthy life (1.87%), the well-being of their offspring (2.08%), the spouse's long life (3.38%), religious activity (5.05%), the hobby activity (4.31%) and the participation in the social activity (5.05%). While, they mainly concern about the illness (1.98%), offspring (2.00%), econmic difficulties (3.39%), inharmonious home (3.81%) and the despicable treatment (3.81%). The respondents wer classified into two groups, they are dependent and independent, using cluster analysis. Health, social activity, offspiring, religion, couple's long life among the factors which lead them to be delighted were turned out to be statistically signhificant at 0.01 significance level between the two groups. As far as their worrisome matters are concerned, health and economic difficulties were significantly different between the two groups. Fourthly, regarding the life interchange, it has been proved that there is a statistically significant differences betwwen the two groups in the economic and the emotional satisfaction, help for ordinary life, status in the family, subjective and objective relationship with offspring, but not in economic dependency and the activity status. Fifthly, it has been noted that there is a high correlation between the degree of life's satisfaction and the extent of life interchange. On the basis of the results mentioned above, it could be concluded taht; i) The majority of the aged in Korea are not economically active, and thus they live with their married offspring even of they have a negative opinion on the subjective relationship with them. This can be pointed out as the main problem of the aged and thus it needs to be studied further. ii) the environmental variables such as age, sex education level, family type and occuption (which can not be changed by their effrot) turned out to give an important effect on the extent of the life interchange among the aged. iii) The respondents who are identified as independent group have a higher degree of life satisfaction and family status than the group identified as defendent. Thus, it can be inferred that it is possible for them to adjust their life by making an effort to modify themselves. iv) The high correlation between the extent of life interchange and the degree of life satisfaction indicates that the elderly themselves can adjust in order to obtain the higher degree of life satisfaction. Therefore, the following suggestions are derived from this study. First of all, the aged should try to be psychologically independent. Second, they need to control themselves in order to achieve self-assurance. Third, the community have to prepare a program of self-development for the aged. Fourth, the social welfare policy that can solve the problem of illness and poverty of the elderly should be introduced, so that their minimum requirements can be satisfied.

• 보건교육건강증진학회지
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• 제22권2호
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• pp.19-32
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• 2005

Objectives: The purpose of this study was to examine teachers' safety education activities to determine the significant educational diagnosis variables and to identify their needs of safety education in early-child care centers based on the PRECEDE model. Methods: A total of 304 teachers in early-child care centers participated in this study selected by a multi-stage stratified sampling method considering 11 regions in Seoul, Korea. Self-report type questionnaires were posted to all teachers in 220 early-child care centers by ground mailing service and the 304 teachers completed the questionnaires. The participants' responses were anonymously coded into and analyzed in SPSS program. Results: 'Scratch or bite' was the most frequent accident type(78.3%) and the frequent accident places were 'classroom(88.8%)' and 'playground(67.8%)'. The most frequently conducted safety education activities were 'reminding children their safe behaviors at the beginning and the end of daily class' and the next was 'saving a special time for safety education.' For educational diagnosis factors, related to safety education activities, teachers' safety education activity was more frequent when teachers' safety knowledge was high(p<.001), when teachers had good application skills of their knowledge to their teaching activities(p<.001), when they had strong needs on safety training opportunities(p<.05), and their interests on safety education(p<.001). For enabling factors, class preparation by safety education guide-book review(p<.001), by development of educational materials(p<.001), and by search for the related reference (p<.001), and by participation to safety education training programs for teachers(p<.01) were the significant enabling factors on teachers' safety class activities. For the reinforcing factors, the center-wide support of safety education brochures to children (p<.001), the concerns of centers utilizing safety education specialists(p<.001), and the concerns about safety information collection out of centers(p<.001) were significant factors related with teachers' safety education activities. Conclusions: The significant educational and institutional factors on teachers' safety education activities were teachers' concerns on safety education, their interests on safety knowledge, and the strong concerns on child safety education from the centers.