• 제목/요약/키워드: wood-concrete

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Quantification of the CO2 Footprint in Residential Construction

  • Don Mah;Juan D. Manrique;Haitao Yu;Mohamed Al-Hussein;Reza Nasseri
    • 국제학술발표논문집
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    • The 3th International Conference on Construction Engineering and Project Management
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    • pp.525-536
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    • 2009
  • The current residential process adheres to a traditional method of construction involving wood framing on-site on poured concrete foundations which has been widely applied in North America. A conventional residential construction process can include seventeen distinct stages ranging from stake-out to pre-occupancy inspection. The current practice possesses short comings including high construction material wastes, long scheduling timelines, adverse weather conditions, poor quality, low efficiencies and negative environmental impacts from transportation and equipment use. Over CAN $5 billion dollars was spent in the construction sector during 2007 in Canada. Previous findings in CO2 emissions during the construction process of a conventional dwelling emphasize more than 45 tonnes of CO2 emissions. Hence, in Alberta alone during 2007, almost 50,000 residential units would release more than two million tonnes of CO2. These numbers demonstrate the economical and environmental impact in building construction and its relationship with CO2 emissions. The aim of this paper is to quantify the CO2 emissions from the current residential construction process in order to establish the baseline for CO2 emission reduction opportunities. The quantification collection methodology will be approached by identifying the seventeen various stages of construction and quantifying the contributions of CO2 from specific activities and their impacts of work for each stage. The approach of separating these into separate stages for collection will allow for independent opportunities for analysis from various independent contractors from the entire scope of work. The use of BIM will be implemented to efficiently quantify CO2 emissions. Based on the CO2 quantification baseline, emission reduction opportunities such as an industrialized construction process will be introduced that allows homebuilders to reduce the environmental and economical impact of home construction while enabling them to produce higher quality, more energy efficient homes in a safer and shorter period of time.

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딥러닝기반 건축폐기물 이미지 분류 시스템 비교 (A Comparison of Image Classification System for Building Waste Data based on Deep Learning)

  • 성재경;양민철;문경남;김용국
    • 한국인터넷방송통신학회논문지
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    • 제23권3호
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    • pp.199-206
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    • 2023
  • 본 연구는 건축시 발생되는 폐기물의 자동분류를 위해 딥러닝 알고리즘을 활용해 건출 폐기물 데이터를 각각 목재 폐기물, 플라스틱 폐기물, 콘크리트 폐기물로 분류하는 두 모델들을 통해서 성능 비교를 한다. 건축 폐기물의 분류를 위해 사용된 딥러닝 알고리즘은 합성곱 신경망 이미지 분류 알고리즘 VGG-16과 NLP를 기반으로 이미지를 시퀀스화 시킨ViT, Vision Transformer 모델을 사용했다. 건축 폐기물 데이터 수집을 위해 이미지 데이터를 전 세계 검색엔진에서 크롤링 하였고, 육안으로도 명확히 구분하기 어렵거나, 중복되는 등 실험에 방해되는 이미지는 전부 제외하여 각 분류당 1천장씩 총 3천장의 이미지를 확보했다. 또한, 데이터 학습시에 모델의 정확도 향상에 도움을 주기 위해 데이터 확대 작업을 진행해 총 3만장의 이미지로 실험을 진행 하였다. 수집된 이미 데이터가 정형화 되어있지 않은 데이터 임에도 불구하고 실험 결과는 정확도가 VGG-16는 91.5%, ViT 는 92.7%의 결과가 나타났다. 이는 실제 건축폐기물 데이터 관리 작업에 실전 활용 가능성을 제시한 것으로 보인다. 본 연구를 바탕으로 추후에 객체 탐지 기법이나 의미론적 분할 기법까지 활용한다면, 하나의 이미지 안에서도 여러 세밀한 분류가 가능해 더욱 완벽한 분류가 가능할 것이다.

동학교 '도로 선천(先天)'사상의 내용과 의의 (The Essence and Significance of the Concept of 'Return to the Former World' in Donghak-gyo)

  • 김탁
    • 대순사상논총
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    • 제48집
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    • pp.199-237
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    • 2024
  • 동학교는 김주희가 세운 동학계 신종교단이다. 동학교가사에 나타난 사상의 요체는 용어의 빈도수와 읊어진 구절의 내용을 고려하여 '도로 선천(先天)'사상이라고 볼 수 있다. 동학의 시운관(時運觀)이 '다시 개벽(開闢)'사상이라면, 동학교의 시운관은 '도로 선천(先天)'사상이다. 동학교에서는 선천이라는 용어를 특히 강조했고, 역학(易學)을 활용하여 노래했으며, '음양의 마주 봄'으로 개벽의 상황을 읊었다. 동학교에서는 후천의 운수마저 다한 다음에야 비로소 '도로 선천'이 이루어지리라고 강조한다. 이 '도로 선천'의 운수가 회복되면 목덕(木德)으로 상징되는 '봄<춘(春)>'이 다시 돌아올 것이라고 노래한다. 동학교에서는 새로운 운수(運數)의 전개를 '역(易)의 회복'으로 설명한다. 새로운 질서와 규범이 전개될 새 세상을 '도로 선천'으로 부르는데, 이때가 되면 '도덕세계'가 이루어져 도덕 문명이 전개될 것이라고 주장한다. '도로 선천'을 회복하는 운수가 바로 천도(天道)가 회복되는 일과 같다고도 노래한다. '도로 선천'사상의 특성은 첫째, 복고적 체계를 지향한다. 둘째, 과거지향적 사상이다. 셋째, '도로'는 '근원으로 돌아가자.', '근본을 회복하자.'라는 실제의 행동을 유발하고 권유하는 생각이다. 동학교의 '도로 선천'사상은 당대의 여러 신종교와는 다르게 선천(先天)에 대해 독창적인 관념과 인식을 부여했으며, 새로운 해석의 틀을 제시했다. 선천을 폐기해야만 할 낡은 시대로 규정했던 일에서 벗어나 지향해야 할 새 시대로 이해했다. 따라서 동학교의 '도로 선천'사상은 동양 전통의 과거로의 회귀와 복귀를 추구하던 일을 계승한 사상의 하나로 재평가되어야 하겠다. 하지만 '도로 선천'사상에 구체적 방법론이 매우 부족하다는 점은 단점으로 지적될 수 있다. 그리고 동학교의 '도로 선천'사상에는 윤리의식이나 도덕적 덕목이 부족하며, 정작 선천(先天)에 대한 설명이 부족하다. 따라서 동학교의 '도로 선천'사상은 선언적 구호에 그친 감이 있다.

양상선(楊上善)의 삼음삼양(三陰三陽) 학설(學說)에 대한 연구 - 음양속성(陰陽屬性), 관합추(關闔樞), 기혈다소(氣血多少)를 중심으로 - (A Study of Yangshangsun(楊上善)'s theory of three-yum and three-yang(三陰三陽) - focus on attribute of three-yum and three-yang(三陰三陽), the bolt-leaf-hanges(關闔樞) theory, large of small of gi-blood(氣血多少))

  • 이용범
    • 대한한의학원전학회지
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    • 제10권
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    • pp.450-493
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    • 1997
  • Three-yum and three-yang(三陰三陽) is the change state of yum-yang(陰陽) which is caused by six gi(六氣). They mean the flow of six gi(六氣) which exist throughout the viscera, the channel(經絡), and the skin. But it is not easy to understand the meaning because the contents of the attribute of three-yum and three-yang(三陰三陽), the bolt-leaf-hanges(關闔樞) theory and large or small of gi-blood(氣血多少) which is the main clue that explain it in ${\ll}$Somun(素問)${\gg}$ and ${\ll}$Yeongchu(靈樞)${\gg}$ don't coincide with each other. I, the writer, tried to understand the uncertain meaning and the contents which are written about three points above differently in each of the books that are ${\ll}$Somun(素問)${\gg}$ and ${\ll}$Yeongchu(靈樞)${\gg}$. So, from that the course that the book, ${\ll}$Huangjenegeong(黃帝內經)${\gg}$ is handed down is so relatively simple in a wood block-printed book, that the ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$ has less wong-words than the Somun(素問) and the Yeongchu(靈樞), and from that Yangshangsun(楊上善) wrote the note in the ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$ by royal order about 100 years former than Wangbing(王氷), as making projects of Yangshangsun(楊上善)'s note and the original of the ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$ which has relation to the yum-yang(陰陽) attribute of three-yum and three-yang(三陰三陽), the bolt-leaf-hanges(關闔樞) theory, and the large or small of gi-blood(氣血多少) and researching the Yangshangsun(楊上善)'s theory. The result is summarized like this. First, wherease the order of the change of three-yum and three-yang(三陰三陽) which is explained by Yangshangsun(楊上善) consider the change of yangi(陽氣) in body most important, the order of the change gaeggi(客氣)'s three-yum and three-yang(三陰三陽) considers chungi(天氣) most important, and the order of jugi(主氣)'s three-yum and three-yang(三陰三陽) considers jigi(地氣)'s change of ohaeng(五行) most important. If the order of change three-yum and three-yang(三陰三陽) in the ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$ is considered, each of taeyang(太陽) and soyum(少陰) are expressed as the base of yum-yang(陰陽) and yangmeong(陽明) and taeyum(太陰) are expressed as the palmy days of yum-yang(陰陽), soyang(少陽) and gyolyum(厥陰) are expressed as pacemaker(樞杻) which controls the change of yum-yang(陰陽). Thus, each has something in common that is fettered by the inside and outside. In the flow of channel(經絡), taeyang(太陽) and soyum(少陰) take charge of the behind of body, yangmeong(陽明) and taeyum(太陰) take charge of the front of body and soyang(少陽) and gyolyum(厥陰) take of the side of body. Second, in Yangshangsun(楊上善)'s bolt-leaf-hanges(關闔樞) theory, three-yum(三陰) is regarded as inside, three-yang(三陽) as outside, so when bolt, leaf and hanges fulfil their duties in inside and outside, the life(life force) is thought to be revealed normally. It is impossible to understand the bolt-leaf-hanges with the conception of the inside and outside which divide three-yum and three-yang(三陰三陽) into taeyang-soyum(太陽-少陰), yangmeong-taeyum(陽明-太陰), soyang-gyolyum(少陽-厥陰) according to yum-yang(陰陽) attribute, hence it need the special conception that is taeyang(太陽)-taeyum(太陰), yangmeong(陽明)-gyolyum(厥陰), soyang(少陽)-soyum(少陰) which center on their duties in inside and outside. In the denunciation of the word open(開) and bolt(關), because Yangshangsun(楊上善) said that the duities of taeyang(太陽) and taeyum(太陰) are shutter(閉禁), bolt(關) is coincided with that significance. Third, with explaining the large or small of gi-blood(氣血多少) of three-yum and three-yang(三陰三陽), Yangshangsun(楊上善) expressed the inside and outside either in the same way or differently. Because the inside and outside is interior of body and exterior of body, it is the explanation that is noticed by the fact that the property of large or small of gi-blood(氣血多少) is either able to be same or different. In this viewpoint, if we unite the contents about large or small of gi-blood(氣血多少) of ${\ll}$Somun(素問)${\gg}$, ${\ll}$Yeongchu(靈樞)${\gg}$, we will find that the descriptions of large or small of gi-blood(氣血多少) of three-yang(三陽) in ${\ll}$Somun(素問)${\gg}$ ${\ll}$Yeongchu(靈樞)${\gg}$ correspond with the ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$, but in three-yum(三陰), the contrary presentations exit. The reason is that large or small of gi-blood(氣血多少) of three-yum(三陰) isn't only expressed as che(體) in the point of che-yong(體用), but as a point of yong(用) that is a phenomenon. As researching the original of ${\ll}$Huangjenegeongtaeso(黃帝內經太素)${\gg}$ and Yangshangsun(楊上善)'s notes as a center about three problems that are yum-yang(陰陽) attribute, the bolt-leaf-hanges(關闔樞) and large or small of gi-blood(氣血多少) of three-yum and three-yang(三陰三陽), I, the writer, tried to explain the part which is written differently or has uncertain conception in the book ${\ll}$Somun(素問)${\gg}$ and the book ${\ll}$Yeongchu(靈樞)${\gg}$, but the concrete result of the work like this will be judged according to the question how many theories are correspondent with real presence at a sickbed. Hence, the work to veryfy the theories in the future will be left as assignment.

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