• Journal of the Korean Wood Science and Technology
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• 제47권5호
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• pp.607-616
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• 2019

On account of the lack of education of Brazilian worker, this paper analyzed the characteristics of those professionals working in the production sector of timber houses. A sectoral survey was carried out with respective entrepreneurs to investigate the available professionals (career and contract types), evaluate the demands of skilled workers, and indicate solutions to improve the quality of labor qualification. Similarly, over 65% of sampled producers presented both direct-hired and outsourced workforce. For such contract ways, Civil Engineers and Architects were the main careers. Carpenters, Civil Engineers and Architects experienced on timber were the main sectoral demands. Timber Engineers have good potentials of service for this sector. The creation of courses on timber products can emerge as a key alternative to train people.

• Structural Engineering and Mechanics
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• 제77권1호
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• pp.75-87
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• 2021

The present study pertains to the introduction of two new types of grip adaptor for universal testing machines, namely Polyvinyl Chloride (PVC) and Polyoxymethylene (POM) grip adaptors, and their application to tension testing of FRP bars with different fiber and surface finish types. The tabs are connected to the FRP bar sample with the help of mechanical anchors, i.e. bolts. These new adaptors offer vital superiorities over the existing end tab designs (anchors with filling material or mechanical anchorage), including the reduction in the time and labor for production, reusability and the mild nature, i.e. low hardness of the tab material, which retards and even prevents peeling and crushing in the gripping regions of an FRP sample. The methods were successfully applied to FRP bars with different types of fiber (CFRP, GFRP and BFRP) and different types of surface texture (ribbed, wrapped, sand-coated and wound). The test results indicated that the both types of end caps prevented slip of the bar, crushing and peeling in the gripping zone. The mechanical properties from the material tests with the new caps were in perfect agreement with the ones from the material tests with steel tubular caps.

• Journal of Korea Trade
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• 제26권1호
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• pp.99-112
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• 2022

Purpose - This paper empirically investigates via a spatial lag model from the perspective of space economy to find the influencing factors of South Korea's OFDI along with 60 countries. Design/methodology - In the study of regional economic phenomena, we must first test the corresponding spatial correlation, and on this basis, complete the construction of the spatial model. For the target research object, after testing the spatial correlation, if there is spatial correlation, a spatial measurement model is needed. This paper uses the global Moran's I index for calculation. Based on the characteristics and research needs of the research object, this paper selects the spatial lag model to verify the existence of the spatial effect and factors affecting OFDI. Findings - Our results show that export scale, infrastructure, technology level, political stability, resource endowment, market size, distance and labor cost have a certain impact on Korea's OFDI, but at present the distance and market size factors are the most important influencing factors for South Korea's OFDI, The technical level and political stability have little effect on South Korea's OFDI, and are not main factors determining South Korea's OFDI. Originality/value - Through spatial measurement verification, it was found that the spatial effect has a significant impact on OFDI, along with more than 60 countries. On this basis, relevant suggestions are put forward, which have strong practical significance for South Korea's OFDI to achieve healthy and sustainable development.

• 로봇학회논문지
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• 제17권3호
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• pp.381-386
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• 2022

We develop a business model for facade cleaning service robot system that provides service by meeting the market needs and environments. The size of the facade cleaning market is growing rapidly in recent years due to the increasing importance of indoor space and the modern trend of building construction methods. Also, maintenance of exterior appearance of buildings has become an important factor in residential and commercial facilities. Though demand for facade cleaning services is rising, the current facade cleaning services are performed dangerously in a human labor-dependent way. It is desirable that the existing human resource service should be replaced with robot-based services. In addition, quantitative analysis of rental pricing model was conducted to propose effective launch of products to the market. The robot system is economically attractive from the consumer's point of view. When the actual facade cleaning robot service is released, it is expected that verification of the business models and more accurate analysis with specific figures can be performed.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2021년도 제63차 동계학술대회논문집 29권1호
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• pp.299-300
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• 2021

이른 새벽, 건설업 일용직 근로자들은 '오늘 일을 할 수 있을까?'란 불안감과 COVID-19의 감염 위험을 안고 인력사무소에 출근한다. 새벽 건설업 시장은 높은 업무 강도와 비효율적인 구인/구직 프로세스로 인해 진입장벽이 높고, 건설기능인력의 고령화로 불법체류 근로자 고용 등의 난항을 겪고 있다. 이에 따라 본 연구에서는 건설업 시장의 구인/구직 정보를 제공하여 앱 내에서 근로자 채용을 가능하게 하고, 외부 API를 사용하여 출퇴근 관리, 안전 이수증 촬영을 통한 인증 등 근로자와 구인자를 위한 비대면 구인/구직 앱 '인력거'를 개발하였다. '인력거' 앱을 통해 간소화된 구인/구직 프로세스 등을 통해 건설업에서 청년 일자리 증대가 기대된다.

• 대한안전경영과학회지
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• 제26권1호
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• pp.45-53
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• 2024

A Smart factories are systems that enable quick response to customer demands, reduce defect rates, and maximize productivity. They have evolved from manual labor-intensive processes to automation and now to cyber-physical systems with the help of information and communication technology. However, many small and medium-sized enterprises (SMEs) are still unable to implement even the initial stages of smart factories due to various environmental and economic constraints. Additionally, there is a lack of awareness and understanding of the concept of smart factories. To address this issue, the Cooperation-based Smart Factory Construction Support Project was launched. This project is a differentiated support project that provides customized programs based on the size and level of the company. Research has been conducted to analyze the impact of this project on participating and non-participating companies. The study aims to determine the effectiveness of the support policy and suggest efficient measures for improvement. Furthermore, the research aims to provide direction for future support projects to enhance the manufacturing competitiveness of SMEs. Ultimately, the goal is to improve the overall manufacturing industry and drive innovation.

• 한국구조물진단유지관리공학회 논문집
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• 제11권6호
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• pp.103-112
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• 2007

본 연구의 목적은 건설현장에서 노무비와 공사비를 절감하기 위하여 5개의 프리캐스트 세그먼트로 구성된 프리스트레스트 콘크리트 거더를 제작하여 그 역학적인 거동 특성을 평가하는데 있다. 본 연구를 위하여 총 4개의 25m 실험체를 동일 단면으로 제작하였으며, 모멘트-처짐 곡선으로 텐던변화와 접합부에 대한 분석과 해석을 수행하였다. 또한, 실험결과를 검증하기 위하여 2차원 비선형유한요소해석을 수행하였으며, 해석결과는 실험체의 모멘트-처짐곡선을 비교적 잘 예측하였다.

• 한국건설관리학회논문집
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• 제17권2호
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• pp.135-145
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• 2016

최근 국내 공동주택 골조공사에 있어서 소음저감형 알루미늄 거푸집의 활용이 증가하고 있다. 그러나 현재까지 개발된 소음저감형 알루미늄 거푸집은 복잡한 작업프로세스로 인해 작업 생산성이 저하되고, 특히 설치 해체 작업 시 알루미늄의 물성으로 인해 발생하는 소음을 여전히 방지하지 못한다는 문제점을 지니고 있다. 따라서 본 연구의 목적은 새로운 소음저감형 알루미늄 거푸집의 최적 개념디자인을 제안하고, 최적 개념디자인을 토대로 제작된 워킹목업(Working Mock-up)의 기술적 타당성을 검토하는 것이다. 이를 위해 본 연구에서는 기존 알루미늄 거푸집의 분석을 통해 새로운 형태의 소음저감형 알루미늄 거푸집 개넘디자인 3개 안을 도출하였으며, 현장 전문가 설문조사를 통해 AHP 분석을 수행하였다. AHP 분석 기법을 활용하여 Trade-off Analysis를 수행한 결과, 안전성(0.52)과 작업편의성(0.54) 부분에서 가장 높은 가중치 값이 도출된 '드롭다운 동바리와 가변빔이 적용된 소음저감형 시스템 알루미늄 거푸집'이 최적 개념디자인으로 선정되었다. 본 연구를 통해 도출된 소음저감형 알루미늄 시스템 거푸집의 최적 개념디자인은 기존 소음저감형 시스템 거푸집의 문제점을 해결하고, 실질적인 소음저감은 물론 작업 편의성 및 노무자의 안전성이 제고된 실제 소음저감형 알루미늄 거푸집의 개발에 활용될 수 있을 것으로 기대된다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2004년도 제5회 정기학술발표대회 논문집
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• pp.79-86
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• 2004

국내 건설산업의 기술자격제도는 노동부주관 $\ulcorner$국가기술자격법$\lrcorner$ 에 의하여 운영되며, 대표적인 국가자격은 건축사, 기술사 및 기사 등을 들 수 있다. 1990년 중반에 도입된 건설사업관리(CM)는 건설산업을 활성화하기 위한 필수불가결의 조건이 되고 있으나 국가자격으로 공인되지 못하고 있으며, 현안문제로서 가장 시급하다고 판단되는 전문인력 양성은 민간 CM교육기관들의 "공인민간자격"으로서 각각의 교육프로그램과 별도의 인증자격을 가지고 이루어지고 있는 실정이다. 문제는 국제공인자격으로서 신뢰성을 확보하고 있는 유일한 미국CM협회(CMAA)의 "CCM"인증자격과 미국VE협회(SAVE)의 "CVS"인증자격의 사례로 볼 때, 외국에 비하여 CM인증자격이 과다하며, 신뢰성과 효율성을 확보하지 못한 상태로 인증자격자득에게 혼란을 주면서 양산되고 있다는 점이다. 본 고에서는 국내CM인증자격의 문제점을 살펴보고 인증자격의 통합 및 체계화를 통하여 국가공인자격으로 발전하기 위한 개선방안을 제시하고자 한다.

• 한국산업보건학회지
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• 제17권3호
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• pp.245-253
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• 2007

This research was performed to evaluate the airborne personal concentration of hazardouse materials during the process of ship construction and surveyed from May 23 to June 30, 2007 in Kyungnam West Distirct, Korea. The subject was 94 ship construction workers exposed to welding fume and respirable particulate. The airborne concentrations of those were compared to Permissible Exposure Limit(PEL) from the Ministry of Labor in Korea. The airborne concentration of 23 samples(48.9%) of welding fumes was less than $5mg/m^3$, that of 16 (34.0%) was between 5 and $10mg/m^3$, and that of 8 (17.0%) was greater than $10mg/m^3$. The airborne concentration of 27 (57.4%) of respirable particulate masses was less than $5mg/m^3$ and the othere are greater than $5mg/m^3$. The welding fumes were identified containing the heavy metasl such as Fe, Mn, Zn, Mg, Ca, and Cu. The respirable particulates has similiar tendency with welding fumes in the component of heavy metals. But the concentration of Ca, Cu, Cr, and Ni turned out to be higher in welding fumes. Twenty (42.6%) of the 47 samples of welding fumes were exceeded PEL. In the heavy metals in welding fumes, ten (21.3%) of the 47 samples of Mn were exceeded PEL. Based on the results, the higher airborne hazardous materials were still exposed to wokers in ship construction process. It is suggested that the appropriate engineering control be applied to minimize the exposed cocnetration in ship building processes.