• Title/Summary/Keyword: Workmanship

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Prism Compressive Strength of Non-structural Concrete Brick Masonry Walls According to Workmanship (시공정밀도에 따른 비구조용 콘크리트벽돌 조적벽체의 프리즘 압축강도)

  • Shin, Dong-Hyeon;Kim, Hyung-Joon
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.36 no.2
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    • pp.127-136
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    • 2020
  • Prism compressive strength is the most influential parameter to evaluate the seismic performance of non-structural concrete brick masonry walls, and is affected by the practice and workmanship of masonry workers. This study experimentally investigates the influence of workmanship on prism compressive strength throughout the compressive test with prism specimens constructed according to masonry workmanship. To do this, the workmanship is categorized into good, fair, and poor conditions which are statistically evaluated with thickness and indentation depth of bed-joints. Then, the effect of workmanship on the structural properties of masonry prisms is evaluated by investigating relations between properties such as their compressive strength, elastic modulus and numerical parameters such as thickness, filling of bed-joints. This study demonstrates that the indentation depth is more important parameter for structural properties of masonry prisms and masonry prisms with loss in bed-joint area less than of 7% can be in fair condition.

Material and workmanship requirements for modern codes of practice

  • Banfi, M.J.A.;Cardwell, S.;Gedge, G.;Murgatroyd, E.C.
    • Steel and Composite Structures
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    • v.5 no.2_3
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    • pp.169-180
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    • 2005
  • Current codes of practice do not exist in isolation, and rules that have been developed assume certain material properties and minimum workmanship in fabrication and erection. These are either in separate documents or different parts of the code. This paper explains the main requirements for materials and workmanship and how they can be related to design and construction in general. The use of very high strength steels is also considered and the measures that may be needed to allow their use with modern codes are also presented.

Study about Developing of Recruiting Serious Games (인재채용 기능성 게임 개발에 관한 연구)

  • Jeon, JoongYang
    • Journal of Korea Game Society
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    • v.12 no.6
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    • pp.71-82
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    • 2012
  • In the middle of global circumstance, having superior workmanship becomes very important factor to be competitive company. Especially, manufacturing development transferred to industry of knowledge service in these days, having superior workmanship is very important factor to determine company's success or failure. Because of this reason, company invests lots of money in recruiting and manages employees in the aspect of total period, such as workmanship training, management and assessment. This study research about development of 'Recruiting Serious Games' and suggests game that makes company conduct recruiting mission for some period and gives practical interview and chance of work through quantitative and qualitative assessment.

Performance evaluation of suspended ceiling systems using shake table test

  • Ozcelik, Ozgur;Misir, Ibrahim S.;Saridogan, Serhan
    • Structural Engineering and Mechanics
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    • v.58 no.1
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    • pp.121-142
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    • 2016
  • The national standard being used in Turkey for suspended ceiling systems (SCS) regulates material and dimensional properties but does not contain regulations regarding installation instructions which cause substandard applications of SCSs in practice. The lack of installation instructions would potentially affect the dynamic performance of these systems. Also, the vast majority of these systems are manufactured using substandard low-quality materials, and this will inevitably increase SCS related damages during earthquakes. The experimental work presented here focuses on the issue of dynamic performance of SCSs with different types of carrier systems (lay-on and clip-in systems), different weight conditions, and material-workmanship qualities. Moreover, the effects of auxiliary fastening elements, so called seismic perimeter clips, in improving the dynamic performance of SCSs were experimentally investigated. Results show that clip-in ceiling system performs better than lay-on system regardless of material and workmanship qualities. On the other hand, the quality aspect becomes the most important parameter in affecting the dynamic performance of lay-on type systems as opposed to tile weights and usage of perimeter clips. When high quality system is used, tile weight does not change the performance of lay-on system, however in poor quality system, tile weight becomes an important factor where heavier tiles considerably decrease the performance level. Perimeter clips marginally increase the dynamic performance of lay-on ceiling system, but it has no effect on the clip-in ceiling system under the shaking levels considered.

Analysis of Partial Discharge Inception Voltages for the Wrong Positioning Defects in the Joint of Distribution Power Cables

  • Kim, Jeong-Tae;Kim, Dong-Uk;Lee, Young-Jo;Koo, Ja-Yoon
    • Journal of Electrical Engineering and Technology
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    • v.7 no.6
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    • pp.977-982
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    • 2012
  • In order to find out partial discharge (PD) phenomena in the cable joint due to the poor workmanship during the installation, the relationship between PD inception voltages and joint defects was investigated. For the purpose, in the joint of 22.9kV CNCV cables, electric fields were calculated for various semiconductive layer wrong positioning (WP) defects. And, PDIV were investigated through the experiments and compared with the results of electric field analysis. In all WP defect cases, the PD inception field calculated using measured PDIVs was similarly shown to be the average value of 1.84kV/mm. In addition, the calculated PDIV and the measured PDIV were almost equal, from the PDIV calculation using maximum electric fields and the measured PDIV for the normal case. Throughout this study, it is possible to analyze WP defects due to the poor workmanship and to establish better joint design for the distribution grade extruded cable system.

Adhesive Performance of Waterproofing System on Concrete Substrate with Moisture Condition (콘크리트 표면 함수비에 따른 교면방수재료의 인장접착성능)

  • 박성기;심재원;이병덕
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.05a
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    • pp.979-984
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    • 2001
  • Poor water-proofing integrity is related to many factors : site procedure, workmanship, weather. substrate conditions, installation(including asphalt application) conditions. The evaluation of adhesive properties tested by concrete surface moisture and asphalt application was based on laboratory test and observations. This report describes the pull-off test results of waterproofing systems currently used for installing and reparing for concrete bridge decks. The test results showed that the moisture condition fully affected the adhesive properties of sheet membranes and sealer but partially for liquid membranes.

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Ayurveda publishing: The ground realities, concurrent problems and possible remedies

  • Rastogi, Sanjeev;Singh, Harsh Ram
    • CELLMED
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    • v.7 no.4
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    • pp.17.1-17.3
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    • 2017
  • Ayurveda is gradually getting more acceptances in the world. The fact is visible through increasing number of Ayurveda articles in leading medical journals and also through the chapters on Ayurveda in various biomedical publications. Although the world is now looking up at the authentic information about Ayurveda, the status of Ayurveda publishing in India is not very promising. Poor workmanship while preparing the articles on Ayurveda and non professional approaches in publishing are the reasons of the poor show and this requires to be seriously taken up.

A Note on the Propeller Rotational Speed Increase due to the Propeller Blade Edge Modification (프로펠러 Edge 수정에 의한 프로펠러 회전수 증가에 관한 소고)

  • 최군일;김동진;박명규
    • Journal of Advanced Marine Engineering and Technology
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    • v.17 no.2
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    • pp.1-8
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    • 1993
  • The cases and the treatments of the rotational speed losses of marine propellers are examined and practical modification methods are discussed. The cutting of the propeller diameter, the modification of propeller pitch and the propeller blade edge modification are briefly reviewed. An example for the propeller blade edge modification, which is regarded to have advantages in cost and workmanship, is presented for a propeller of a large ship.

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The development and application for the diagnosis method on the crack broked out of new constructions (신설공사에 발생한 균열에 대한 진단 방법의 개발 및 활용 사례)

  • 권영진;한영철;장태민;이병훈;박득곤;김무한
    • Proceedings of the Korea Concrete Institute Conference
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    • 1997.04a
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    • pp.551-556
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    • 1997
  • Concrete can be defective for several reasons, including inadequate design, material selection or workmanship. Concrete and also dsteriorate or be damaged in use. Consequently existing reinforced concrete may not be functioning as originally intended and designed. So, the evaluate process to investigate initial crack is very important. It is the aim of this study to development and application for diagnosis method on the crack broker out of new constructions.

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