scholarly journals Strain Concentration Ratio Analysis of Different Waterproofing Materials during Concrete Crack Movement

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4429
Author(s):  
Kyu-hwan Oh ◽  
Soo-yeon Kim
Keyword(s):  
Concentration Ratio ◽  
Evaluation Method ◽  
Strength Properties ◽  
Ratio Analysis ◽  
Strain Concentration ◽  
Testing Method ◽  
Concrete Crack ◽  
Crack Movement ◽  
Movement Simulation ◽  
Selection Of

When a crack occurs under an installed waterproofing material and moves due to environmental effects (freeze–thaw, settlement, vibration, dead load, etc.), waterproofing materials without adequate elongation or tensile strength properties may break and tear. To enable the selection of materials with proper response against the strain that occur during crack movement, this study proposes and demonstrates a new evaluation method for determining and comparing strain concentration of waterproofing materials under the effect of concrete crack movement. For the proposed testing method and demonstration, three common types of waterproofing material types were selected for testing, poly-urethane coating (PUC), self-adhesive asphalt sheet (SAS) and composite asphalt sheet (CAS). Respective materials are installed with strain gauges and applied onto a specimen with a separated joint that undergoes concrete crack movement simulation. Each specimen types are subject to repeated movement cycles, whereby strain occurring directly above the moving joint is measured and compared with the strain occurring at the localized sections (comparison ratio which is hereafter referred to as strain concentration ratio). Specimens are tested under four separate movement length conditions, 1.5 mm, 3.0 mm, 4.5 mm and 6.0 mm, and the results are compared accordingly. Experimental results show that materials with strain concentration ratio from highest to lowest are as follows: PUC, SAS and CAS.

scholarly journals A Multi-Attribute Decision Method under Uncertainty Environment Conditions—The Green Supplier Evaluation Perspective

2021 ◽  
Vol 18 (1) ◽  
pp. 344
Author(s):  
Hao Xu ◽  
Liuxin Chen ◽  
Qiongfang Li ◽  
Jianchao Yang
Keyword(s):  
Environmental Pollution ◽  
Evaluation Method ◽  
External Environment ◽  
Environmental Indicators ◽  
Supplier Evaluation ◽  
Uncertain Environment ◽  
Green Suppliers ◽  
Uncertainty Environment ◽  
Selection Of

Due to the continuous changes of political environment, consumption habits, technological progress and other factors, the external environment of enterprises is full of uncertainty. The turbulence of external environment is not conducive to the long-term operation and development of enterprises, but also brings great challenges to the selection of suppliers. This makes the competition of enterprises focus on how to choose long-term cooperation suppliers in the uncertain external environment. In addition, due to the deterioration of the global environment, governments pay more and more attention to environmental pollution, and consumers are more and more inclined to green consumption, which makes many companies pay more and more attention to environmental indicators when selecting suppliers. In the case of external environment turbulence and serious environmental pollution, the evaluation and selection of green suppliers in uncertain environment is particularly important for the long-term development of enterprises. What’s more, when the supplier’s capability gap is small, the decision-maker often hesitates among several suppliers. In this paper, the hesitant fuzzy is used to describe the hesitant psychology of decision-makers in selecting suppliers, the variance fluctuation is used to describe the characteristics of hesitant fuzzy numbers, and the probability is used to measure the uncertainty of the environment. A green supplier evaluation model under the uncertainty environment is proposed, which comprehensively evaluates the green suppliers under the uncertain environment. Furthermore, it is compared with other methods that do not consider the uncertainty and the adaptability of evaluation method and right confirmation method, so as to reflect the influence of uncertainty to green supplier evaluation and the importance of adaptability of evaluation method and right confirmation method.

scholarly journals Renewable Energy Technology Selection Problem Using Integrated H-SWARA-MULTIMOORA Approach

2018 ◽  
Vol 10 (12) ◽  
pp. 4481 ◽  
Author(s):  
Abteen Ijadi Maghsoodi ◽  
Arta Ijadi Maghsoodi ◽  
Amir Mosavi ◽  
Timon Rabczuk ◽  
Edmundas Zavadskas
Keyword(s):  
Renewable Energy ◽  
Complex Problem ◽  
Development Project ◽  
Selection Problem ◽  
Technology Selection ◽  
Ratio Analysis ◽  
Energy Technology ◽  
Renewable Energy Technology ◽  
Multiple Attribute ◽  
Selection Of

Due to the adaptation of recent pollution mitigation and justification policies there has been a growing trend for electricity generation from various renewable resources. The selection of the optimal renewable energy technology could be measured as a complex problem due to the complication of forthcoming circumstances in any country. Consequently, the proposed similar complex assessment problem can be tackled with the support of Multiple Attribute Decision Making (MADM) methods. The current research study investigates a technology selection problem by proposing a hybrid MADM approach based on the Step-Wise Weight Assessment Ratio Analysis (SWARA) approach with a hierarchical arrangement combined with the Multi-Objective Optimization on the basis of Ratio Analysis plus the full MULTIplicative form (MULTIMOORA). Ultimately, a conceptual case study regarding the selection of the optimal renewable energy technology based on a conceptual development project in Iran has been examined by the proposed combinative MADM methodology.

scholarly journals To the Question of Designing Baromembrane Combined Type Apparatus

2021 ◽  
Vol 27 (3) ◽  
pp. 415-427
Author(s):  
S. I. Lazarev ◽  
O. V. Lomakina ◽  
V. E. Bulanov ◽  
I. V. Khorokhorina
Keyword(s):  
Strength Properties ◽  
Technological Parameters ◽  
Mechanical Loads ◽  
Membrane Apparatus ◽  
Strength And Stiffness ◽  
Selection Of ◽  
Toroidal Shells ◽  
Type Apparatus

The paper considers works on methods for calculating design and technological parameters, design of membrane equipment, research of technological features of membrane devices, selection of design schemes, methods for calculating strength and stiffness. A method has been developed for calculating mechanical loads and determining the thickness of plates and toroidal shells of a membrane apparatus of the combined type, which makes it possible to assess the strength properties of apparatus of this class. An example of a calculation, which makes it possible to assess the adequacy of the application of this technique to devices of the combined type, is given.

scholarly journals POLA KONSENTRASI SPASIAL INDUSTRI KECIL MENENGAH DI PROVINSI NUSA TENGGARA BARAT

GANEC SWARA ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 858
Author(s):  
CHANDRADITYA BAGASKARA ◽  
PUTU KARISMAWAN ◽  
FIRMANSYAH FIRMANSYAH
Keyword(s):  
Concentration Ratio ◽  
Production Cost ◽  
Location Theory ◽  
Ratio Analysis ◽  
Analysis Framework ◽  
Economic Activities ◽  
Systematic Analysis ◽  
Power Sources ◽  
The Right ◽  
The Impact

      Location Theory gives systematic analysis framework  of selecting location of economic adn social activities. Chosing of the right location  thrifts reduce the transportation and production cost that drives efficient in production and marketing. The impact of efficiency is the higest profit and concentration of economic activities. There are many factor afecting the concentration of economic activities, such as wages, man power sources and productivity. Based on Concentration Ratio analysis that Small-medium  industries cosentrated in Mataram City and Central Lombok distric. Based on concentration Index of Man power  shows that the concentration of man power  are in Sumbawa district, North Lombok, Central Lombok, Bima City, Bima district and West Lombok district. Based on those  result that concentration spatial of Small-Medium Industries in each district of West Nusa Tenggara are not equal . Based on Regresioan analysis with Randomeffect Model that concentration of small-medium industries in West Nusa Tenggara siginificanly corelated with amount of man power and productivity, neither than wages.

Concentration Ratio Analysis of Linear Fresnel Reflector

2011 ◽  
Vol 31 (8) ◽  
pp. 0808001 ◽  
Author(s):  
杜春旭 Du Chunxu ◽  
王普 Wang Pu ◽  
吴玉庭 Wu Yuting ◽  
马重芳 Ma Chongfang
Keyword(s):  
Concentration Ratio ◽  
Ratio Analysis ◽  
Linear Fresnel Reflector

INTERCOMPARISON ON INTERNAL DOSE ASSESSMENT FOR NUCLEAR POWER PLANTS IN KOREA

2019 ◽  
Vol 186 (4) ◽  
pp. 524-529
Author(s):  
Si Young Kim
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Evaluation Method ◽  
Dose Assessment ◽  
Assessment Procedure ◽  
Internal Dose ◽  
Nuclear Facilities ◽  
International Intercomparison ◽  
Selection Of

Abstract The intercomparison test is a quality assurance activity performed for internal dose assessment. In Korea, the intercomparison test on internal dose assessment was carried out for nuclear facilities in May 2018. The test involved four nuclear facilities in Korea, and seven exposure scenarios were applied. These scenarios cover the intake of 131I, a uranium mixture, 60Co and tritium under various conditions. This paper only reviews the participant results of three scenarios pertinent to the operation of nuclear power plants and adopts the statistical evaluation method, used in international intercomparison tests, to determine the significance values of the results. Although no outliers were established in the test, improvements in the internal dose assessment procedure were derived. These included the selection of intake time, selection of lung absorption type according to the chemical form and consideration of the contribution of previous intake.

scholarly journals The Proposal of an Electronic Business Model in Agriculture Case Study: The Orchard Products in Isfahan Province

Paradigm ◽  
2020 ◽  
Vol 24 (1) ◽  
pp. 22-40
Author(s):  
Tabasom Saberi ◽  
Abbas Khodadadi ◽  
Hamid Saeedi
Keyword(s):  
Business Model ◽  
Evaluation Method ◽  
Agricultural Sector ◽  
Qualitative Evaluation ◽  
Electronic Business ◽  
Snowball Sampling ◽  
Isfahan Province ◽  
Selection Of ◽  
Three Phases

The four indicators, occupational personality, information, money and product mechanisms, are assessed in this study. Experts from the Isfahan province’s agricultural sector have focused on the quality method to find an approved e-commerce model for the orchard of products. The qualitative evaluation method in this study is of Delphi carried out in three phases of snowball sampling in five groups of agricultural experts. The results indicate that the main actors in this field consist of three groups, intellectual, realistic and conventional, which areas of similarities, differentiation and prediction. The results from the review run on information, money and product indicate that experts in the selection of purchasing, exchange and communication mechanisms, in some respects, agree on similar models of the merchant, manufacturer and brokerage, and in some other areas they have represented new definitions.

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