• Safety and Health at Work
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• 제12권1호
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• pp.119-126
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• 2021

Background: During the period 2001 to 2016, the maximum temperatures in Thailand rose from 38-41℃ to 42-44℃. The current occupational heat exposure standard of Thailand issued in 2006 is based on wet bulb globe temperature (WBGT) defined for three workload levels without a work-rest regimen. This study examined whether the present standard still protects most workers. Methods: The sample comprised 168 heat acclimatized workers (90 in construction sites, 78 in foundries). Heart rate and auditory canal temperature were recorded continuously for 2 hours. Workplace WBGT, relative humidity, and wind velocity were monitored, and the participants' workloads were estimated. Heat-related symptoms and signs were collected by a questionnaire. Results: Only 55% of the participants worked in workplaces complying with the heat standard. Of them, 79% had auditory canal temperature ≤ 38.5℃, compared with only 58% in noncompliant workplaces. 18% and 43% of the workers in compliant and noncompliant workplaces, respectively, had symptoms from heat stress, the trend being similar across all workload levels. An increase of one degree (C) in WBGT was associated with a 1.85-fold increase (95% confidence interval: 1.44-2.48) in odds for having symptoms. Conclusion: Compliance with the current occupational heat standard protects 4/5 of the workers, whereas noncompliance reduces this proportion to one half. The reasons for noncompliance include the gaps and ambiguities in the law. The law should specify work/rest schedules; outdoor work should be identified as an occupational heat hazard; and the staff should include occupational personnel to manage heat stress in establishments involving heat exposure.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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• pp.81-84
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• 2008

This paper discussed the validity of wind force power generation in consideration of the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants, we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind velocity, the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was higher at wind power plants installed in southwestern coastal areas where wind velocity was low than at those installed in mountain areas in Gangwondo where wind velocity was high. This suggests that the shape parameter of wind distribution is low due to the characteristics of mountain areas. and the standard deviation of wind velocity is large due to the effect of mountain winds, and therefore, actual generation is low in mountain areas although wind velocity is high.

• Journal of information and communication convergence engineering
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• 제3권4호
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• pp.195-200
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• 2005

The MPEG-4 standard is aimed to define an object based audiovisual coding standard to address the emerging needs from interactive broadcasting. Since a broadcasting program is created on the basis of its objects, it is considered that MPEG-4 is most suitable for interactive broadcasting contents production and it can be retrieved in terms of its properties. But, there is no system that protects the copyright of digital contents and manages copyright and possibility that contents producer and author's copyright receives infringement at process that exchange contents mutually rose very. Therefore, we need to control and distribute contents according to user's permission rights. In this paper, we present the authoring system based on MPEG-4 IPMP for copyright and protection of MPEG-4 contents. The main features of the proposed approach is to provide an MPEG-4 compliant IPMP authoring system in a plug-in type along with standardized interfaces, which is to be able to incorporated into an existing MPEG-4 content authoring system. In this way, it is capable of authoring content to the MP4 file format while accommodating protection and management of content in a unified way. Furthermore, it also allows a user to edit and/or author IPMP information in a more efficient way by offering form based user interfaces.

• 한국태양에너지학회 논문집
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• 제28권6호
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• pp.24-32
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• 2008

This paper discussed the Feasibility study of wind power generation considering the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants, we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind speed, the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was almost the same at wind power plants installed in southwestern coastal areas where wind speed was low as at those installed in mountain areas in Gangwondo where wind speed was high. This demonstrates that the shape parameter of wind distribution is low due to the characteristics of mountain areas, and the standard deviation of wind speed is large due to the effect of mountain winds, therefore, actual generation compared to southwestern coastal areas is almost similar in mountain areas even though wind speed is high.

• 한국육종학회지
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• 제40권1호
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• pp.76-79
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• 2008

'퓨어하트' 품종은 경기도농업기술원에서 2002년도에 육성한 절화용 장미 신품종이다. 이 품종은 1998년도에 화색이 분홍색이며 화형이 우수한 스탠다드 장미 'Saphir' 품종을 모본으로 하고 향기가 있는 백색 스탠다드 장미 'Crystal Line' 품종을 부본으로 하여 교배를 하였다. 1998년에 실생을 양성하여 화색과 화형이 우수한 25계통을 예비선발 하였으며 2000~2002년에 1, 2, 3차 특성검정과 품평회 결과 절화특성이 우수한 KR98-12-2(Gyeonggi R1-2)계통을 최종 선발하였다. 화색은 연한 분홍색이며 화폭은 6.8cm 화고는 4.5cm로서 중형 크기의 스탠다드 형태로 개화하고 화형은 반고심형이며 꽃잎수는 44.8매이고 향기 정도는 약한 편이다. 년간 절화수량은 122본/$m^2$이고 절화장은 66.0cm이며 줄기직경은 6.1mm이고 엽수는 11.0매이며 절화중은 25.6g이고 절화수명은 8.0일이다.

• 한국가구학회지
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• 제24권2호
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• pp.208-216
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• 2013

The need of the life be healthy is increasing to the human life prolongation. There are lots of companies using the use of environment-friendly material as the sales strategy today. But a consumer is insufficient of the information about the environment-friendly ingredient. The level of Consciousness for the consumer standard of living and health got higher recently. And the interest about the furniture material comprising the residential space rose. I consider the consumer changing mind the safety of the conservation of the environment and mankind. Also, future of the environment-friendly material can say that is light if develop various the environment-friendly material description and accomplish the Higher Value-added of resource.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제49권9호
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• pp.584-589
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• 2000

We fabricated resistive superconducting fault current limiters (SFCL) based on YBCO thin films grown on a 2-inch diameter Al2O3 substrate. The current limiting element was 1 mm wide and 260mm long meander line prepared by standard photolithography. The minimum quench current of the current limiting element was about 8 Apeak. This SFCL sucessfully controlled the fault current below 14.3 Apeak at the voltage of 100 Apeak which is otherwise to increase up to 141 Apeak. The quench completion time was less than 3 msec. The temperature of the current limiting element rose to about 200 K in 3 cycles after fault. The SFCL showed reproducible quench during hundreds times of repeated experiments.

• 대한가정학회지
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• 제31권4호
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• pp.83-94
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• 1993

This study examines changing norms concerning divorce in societal context of the historical perspective. The analysis indicates that the changes in divorce norms were particularly striking during industrialization and urbanization. In traditional society, there are various divorce norms according to each era. In Sam Kuk era, there is not the norms of divorce, but there is norms of divorce by Yea Kdeu ideology in Gorea era. During the Zo Sun era, the strict restrict seven possible norms and three overriding ones for divorce rates significantly rose in after the industrialization in response to the continuation of such social changes as greater participation of women in labor force, increased alternative to traditional marriage, the declining stigma attached to divorce, and the rising standard for individual happiness in marriage and so on. Divorce rates are also affected by other factors, such as political and economic conditions, geographic differences, and various demographic characteristics.

• 원예과학기술지
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• 제32권5호
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• pp.721-729
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• 2014

본 연구에서는 소비자들의 주요 절화류에 대한 구매행동과 인식을 파악하여 시장을 예측하고, 소비 활성화 방안을 제시하고자 하였다. 설문조사를 전문 리서치 기관에 대행하여 실시하였고, 주요 절화류를 대상을 조사를 하여 컨조인트 및 군집분석을 하였다. 설문조사결과, 장미의 경우는 선택 속성별 중요도는 가격과 절화수명이 비슷하게 높았으며, 그 다음으로 화색, 화형의 순으로 분석되었다. 각 속성별 부분가치를 보면, 가격은 1000원, 꽃의 형태는 군집1의 남성의 경우만 빼고 여성 군집 2,3,4,5,6,7의 경우 모두 스프레이 형태의 장미를 선호하였다. 꽃의 절화수명에 대한 중요도는 높은 수준을 보여 모든 군집에서 7-8일로 나타났고 화색은 빨강색을 가장 선호하였다. 국화의 경우 선택속성별 중요도는 화색이 가장 높고, 그 다음으로 절화수명, 화형, 가격 순으로 분석되었다. 부분가치를 보면 가격은 1000원, 화형은 스탠다드, 절화수명은 16-20일, 화색은 노란색이 가장 높았다. 백합의 경우 선택속성별 중요도는 화형이 가장 높았고, 그 다음으로 절화수명, 가격, 화색 등의 순으로 분석되었다. 부분가치를 보면, 가격은 2000원, 화형은 대형을, 절화수명은 4-7일, 화색은 노란색이 가장 높았다. 주요 절화(장미, 국화, 백합)을 대상으로 컨조인트 분석 결과, 장미의 경우 가격과 절화수명이 가장 높게 나타났으며, 국화는 절화수명과 화색, 백합은 화형과 절화수명으로 나타났다. 주요 절화 모두 공통적으로 절화수명의 중요도가 높은 것으로 나타났다. 본 연구에서는 소비자 조사를 통해 주요 절화류에 대한 소비자의 선호 패턴을 분석하고 이를 근거로 소비자의 기호에 맞는 상품을 기획 생산하여 화훼류 소비 활성화 방안을 위한 기초조사 자료를 제시하고자 하였다.

• 현장농수산연구지
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• 제24권4호
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• pp.30-34
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• 2022

본 연구는 일조방해에 의한 광환경의 변화가 절화 장미의 생산성과 품질에 미치는 영향을 분석하기 위해 절화용 스탠다드 장미 'Monet' 품종에 인위적으로 차광 처리하여 일조를 방해하고 일조방해 시간에 따른 장미의 절화수량과 생육특성을 조사하였다. 일조방해 시간에 따른 절화 장미 'Monet'의 단위면적(3.3m²)당 절화수량은 무처리구에서 40본인 반면 4시간, 8시간, 12시간 처리구에서는 각각 32본, 29본, 25본으로 일조방해 시간이 증가함에 따라 절화수량이 감소되는 경향을 나타내었다. 절화 장미의 품질과 관련된 절화 특성의 경우에도 무처리구에 비해 12시간 처리구에서 화폭과 화고, 꽃잎의 길이와 폭 등 모든 특성에서 10~20% 정도 감소하였다. 또한 절화 장미의 상품성을 결정하는 화경장과 꽃대 굵기, 절화중 등의 생육특성도 일조방해 시간이 증가됨에 따라 감소하는 경향을 보였다. 이에 반해 개화소요일수는 24.3일에서 27.7일로 14.0% 증가하는 등 일조방해 시간이 증가됨에 따라 전반적인 생육은 위축되고 개화는 지연되는 특성을 나타내었다. 본 연구의 결과에서 일조방해 시간이 증가함에 따라 꽃의 크기가 감소하고 화경장 및 절화의 생체중 등이 감소한 것은 일조방해로 인해 일평균 광합성광량자속밀도(PPFD)가 감소하고 이에 따라 총광합성량이 감소하면서 장미의 생장과 발달에 필요한 양분을 충분히 공급받지 못했기 때문으로 판단된다.