Статті в журналах: "Indicators of the material flow"

1

Moriguchi, Yuichi. "Material flow indicators to measure progress toward a sound material-cycle society." Journal of Material Cycles and Waste Management 9, no. 2 (September 26, 2007): 112–20. http://dx.doi.org/10.1007/s10163-007-0182-0.

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2

Fischer‐Kowalski, M., F. Krausmann, S. Giljum, S. Lutter, A. Mayer, S. Bringezu, Y. Moriguchi, H. Schütz, H. Schandl, and H. Weisz. "Methodology and Indicators of Economy‐wide Material Flow Accounting." Journal of Industrial Ecology 15, no. 6 (August 31, 2011): 855–76. http://dx.doi.org/10.1111/j.1530-9290.2011.00366.x.

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3

Patrício, João, Yuliya Kalmykova, Leonardo Rosado, and Vera Lisovskaja. "Uncertainty in Material Flow Analysis Indicators at Different Spatial Levels." Journal of Industrial Ecology 19, no. 5 (September 23, 2015): 837–52. http://dx.doi.org/10.1111/jiec.12336.

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4

Kulikov, Petrо, Alla Bielova, and Nataliia Zhuravska. "Two-tier integral indicator system for controlling the material flow heat-power engineering objects." USEFUL online journal 2, no. 4 (December 30, 2018): 80–87. http://dx.doi.org/10.32557/useful-2-4-2018-0009.

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The essence and the possibility of creation and application of a compliant two-level integrated indicator control on the technology of non-reagent water preparation in the heating systems of heat energy objects of the building industry is substantiated. Proposed scientific principles concerning development of indicator control system. It is established that quantitative characterization of components of material flows of heat systems as a measure of their additive functions and response to changes in catalytic activity is determined by their subordinated indicator control mechanism. Two-level control involves: 1) the relationship between the device for receiving magnetized water (parameters) and the heating system (specific indicators and their indices); 2) the relationship between the specific indicators characterizing the state of material flows of the heating systems and the trends of changes in material flows under the conditions of the action of electromagnetic fields on them - the hydrochemical, electrophysical and thermophysical potentials. Indicator control system provides engineering-ecological aspects of non-reagent water preparation of systems of heat energy objects of the building industry.

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5

Fang, Ming, Ming Li Cao, Yan Li, and Yong Li. "Material Flow Analysis on Cement Industry." Advanced Materials Research 512-515 (May 2012): 3042–46. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.3042.

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Since the relationship between supply and demand of natural resources is on edge in the long run, the traditional extensive growth mode of economic development needs changing. Cement is widely used in construction. Producing cement needs large amount of natural resources and releases high waste emissions. By using Material Flow Analysis, the inputs and outputs of each part of manufacturing are analyzed scientifically and the inputs, outputs and efficiency indicators are accounted. The main hidden flows come from energy consumption, and the main harmful waste is CO2which comes from fuel combustion and CaCO3decomposition. Improving resource consumption efficiency and reducing CO2emission are the key ways to alleviate pressures on the environment.

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6

Kim, Yu-Jeong. "Evaluation for Sustainable Resource Management In Korea using Material Flow Indicators." Journal of the Korean Institute of Resources Recycling 20, no. 6 (December 31, 2011): 43–49. http://dx.doi.org/10.7844/kirr.2011.20.6.043.

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7

Zhi, Jing, Ze Qiang Fu, Peng Shen, and Bao Gao. "Analysis of Material Metabolism for Ningdong Energy(Coal) and Coal Chemical Base." Applied Mechanics and Materials 71-78 (July 2011): 2132–35. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.2132.

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Material flow analysis (MFA) has become a useful tool fo to analyze the metabolism of social systems. This paper proposes to use the indicators derived from MFA, complemented with water and energy indicators, to analyze the efficiency and the materialization ranks of Ningdong energy(coal) and coal chemical base (China). The companies in the base have many opportunities to improve on these aspects and the indicators can measure and reflect their evolution. In addition, the results show the importance that some flows such as water inputs which often are omitted, can have in some study cases.

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8

Modrak, Vladimir, and Zuzana Soltysova. "Novel Complexity Indicator of Manufacturing Process Chains and Its Relations to Indirect Complexity Indicators." Complexity 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/9102824.

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Manufacturing systems can be considered as a network of machines/workstations, where parts are produced in flow shop or job shop environment, respectively. Such network of machines/workstations can be depicted as a graph, with machines as nodes and material flow between the nodes as links. The aim of this paper is to use sequences of operations and machine network to measure static complexity of manufacturing processes. In this order existing approaches to measure the static complexity of manufacturing systems are analyzed and subsequently compared. For this purpose, analyzed competitive complexity indicators were tested on two different manufacturing layout examples. A subsequent analysis showed relevant potential of the proposed method.

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9

Amano, Koji, and Misato Ebihara. "Eco‐intensity analysis as sustainability indicators related to energy and material flow." Management of Environmental Quality: An International Journal 16, no. 2 (April 2005): 160–66. http://dx.doi.org/10.1108/14777830510583173.

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10

Mayer, Andreas, and Willi Haas. "Cumulative material flows provide indicators to quantify the ecological debt." Journal of Political Ecology 23, no. 1 (December 1, 2016): 350. http://dx.doi.org/10.2458/v23i1.20222.

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There is ample evidence that an unabated growth in material consumption is likely to pass the earth system's source and sink capacities. In the face of limited resources, distributional questions increasingly gain importance. Material flow accounting is a methodological tool to trace biophysical patterns of disproportionate resource consumption across countries and the debt towards the environment, other parts of the world, and towards future generations through the excessive consumption of natural resources. At the core of this article, we address different developments of material use for individual countries and world regions from 1950 to 2010. During this phase, fossil fuel-based industrialization triggered an unprecedented growth in material consumption, mainly in the wealthy world regions of Europe, Australia, North America, and partly in the countries of the former Soviet Union, while low resource consumption persists in other regions. We thus calculated cumulative resource use from 1950 to 2010 to show the extent of this wealth built up upon countries' own resources, or through imports from other countries or world regions. We use the degree of net-import dependency of individual countries as a proxy for the ecological debt, and relate it to the domestic resource extraction in a country. Our observations show that there was a highly uneven distribution of resource extraction and use in the 60 years analyzed, which has important implications for future global resource policies.Keywords: Ecological debt, material flow accounting, international trade, global resource useRésuméIl

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11

Kovaleva, A., A. Kvitchasty, and V. Anisimov. "PSYCHOPHYSIOLOGICAL INDICATORS OF FLOW STATE." Human Sport Medicine 20, no. 2 (July 13, 2020): 47–52. http://dx.doi.org/10.14529/hsm200206.

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Aim. The study aims to reveal objective psychophysiological indicators that are related to flow state. Materials and methods. Thirty-one (31) athletes of different competitive levels (20 females and 11 males, mean age 19.1 ± 4.59 years) participated in the study. The dynavision D2 training device was applied for creating optimal flow state conditions during the experiment. Physiological indicators were recorded by the Thought Technology hardware and software system. Heart rate variability, respiration rate (thoracic and abdominal), finger temperature, skin conductance were analyzed. Flow state depth was estimated based on the participants’ answers during the semi-structured interview that followed the experiment. Results. According to the results of the interview, all athletes were divided into two groups: the first group included athletes experiencing flow state (“flow” group), the second group composed of athletes who did not manage to experience flow state (“no-flow” group). When comparing these two groups after the experiment, it was revealed that the first group had higher levels of standard deviations of heart rate compared with the second group. In the first group (flow), the following indicators were significantly higher after the experiment: standard deviation of the RR-intervals (SDRR), skin conductance, and finger temperature. In the second group (no-flow), only skin conductance increased significantly. Conclusion. The results allow us to conclude that the flow state is characterized by a marked increase in the sympathetic nervous system (a higher level of stress compared to the same activity without flow).

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12

Kovanda, Jan, and Jan Weinzettel. "Economy-wide Material Flow Indicators on a Sectoral Level and Strategies for Decreasing Material Inputs of Sectors." Journal of Industrial Ecology 21, no. 1 (February 26, 2016): 26–37. http://dx.doi.org/10.1111/jiec.12410.

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13

Zhang, Chao, Wei-Qiang Chen, Gang Liu, and Da-Jian Zhu. "Economic Growth and the Evolution of Material Cycles: An Analytical Framework Integrating Material Flow and Stock Indicators." Ecological Economics 140 (October 2017): 265–74. http://dx.doi.org/10.1016/j.ecolecon.2017.04.021.

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14

Tanikawa, Hiroki, Ichiro Daigo, Masahiro Oguchi, Keijiro Okuoka, and Shigesada Takagi. "Material Stock and Flow Analysis and its Indicators in a Stock-type Society." Material Cycles and Waste Management Research 28, no. 6 (November 30, 2017): 431–37. http://dx.doi.org/10.3985/mcwmr.28.431.

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15

Rattanapan, Cheerawit, Thunwadee Tachapattaworakul Suksaroj, and Weerawat Ounsaneha. "Development of Eco-efficiency Indicators for Rubber Glove Product by Material Flow Analysis." Procedia - Social and Behavioral Sciences 40 (2012): 99–106. http://dx.doi.org/10.1016/j.sbspro.2012.03.167.

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16

Hashimoto, Seiji, and Yuichi Moriguchi. "Proposal of six indicators of material cycles for describing society's metabolism: from the viewpoint of material flow analysis." Resources, Conservation and Recycling 40, no. 3 (February 2004): 185–200. http://dx.doi.org/10.1016/s0921-3449(03)00070-3.

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17

Eisenmenger, Nina, Dominik Wiedenhofer, Anke Schaffartzik, Stefan Giljum, Martin Bruckner, Heinz Schandl, Thomas O. Wiedmann, Manfred Lenzen, Arnold Tukker, and Arjan Koning. "Consumption-based material flow indicators — Comparing six ways of calculating the Austrian raw material consumption providing six results." Ecological Economics 128 (August 2016): 177–86. http://dx.doi.org/10.1016/j.ecolecon.2016.03.010.

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18

Kouřilová, J., and J. Sedláček. "Environmental accounting and the FADN as a basis of model for detecting the material flow cost accounting." Agricultural Economics (Zemědělská ekonomika) 60, No. 9 (September 30, 2014): 420–29. http://dx.doi.org/10.17221/79/2013-agricecon.

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The quality of the reported accounting data and the way these data are used are becoming more and more risky aspects of business management. Many instruments are already used to identify the creative accounting and the frauds and new ones are still being searched for. One of the suitable approaches is the use of the database Farm Accountancy Data Network (FAND) and environmental indicators. Monitoring of material balances and wastes in the form of environmental costs and also parts of the material balances can be a basis for the creation of the model for the detection of the material flow cost accounting. The model uses other balance areas as well: financial, energy-related and legislative. The paper presents a proposal of the model and its possible use for the discussion. The proposed model was applied to the real conditions of two real production companies with trading activities. Its strengths and weaknesses are evaluated.  

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19

Kovanda, Jan, Tomas Hak, and Jiri Janacek. "Economy-wide material flow indicators in the Czech Republic: trends, decoupling analysis and uncertainties." International Journal of Environment and Pollution 35, no. 1 (2008): 25. http://dx.doi.org/10.1504/ijep.2008.021129.

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20

Karcagi-Kováts, Andrea. "The use of MFA indicators in the characterization of the settlement sustainability." Acta Agraria Debreceniensis, no. 34 (September 2, 2009): 107–16. http://dx.doi.org/10.34101/actaagrar/34/2827.

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One of the key sustainability challenges for the coming decades will be to improve the management of natural resources in order to reduce current levels of anthropogenic environmental pressure and respect the biological and physical limits and the carrying capacity of the planet. The first step towards meeting this challenge is an enhancement of the understanding of the material basis of our society. In the past 15 years, scientists in several research institutes have created a fast growing field of research, a new family of different methods, named material flow analysis (MFA). These instruments have an increasing policy relevance: international organizations (UN, EU, OECD) have encouraged member states to establish MFA accounting in their statistical programmes and urged governments and economic actors to use these tools. In this paper I present selected examples to reveal how the MFA approach and derived material flow indicators can be used for the evaluation of sustainability policies at municipality level.

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21

Lütje, Anna, and Volker Wohlgemuth. "Tracking Sustainability Targets with Quantitative Indicator Systems for Performance Measurement of Industrial Symbiosis in Industrial Parks." Administrative Sciences 10, no. 1 (January 8, 2020): 3. http://dx.doi.org/10.3390/admsci10010003.

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Industrial Symbiosis (IS) is a systematic and collective (business) approach to optimizing the use of materials and energy among cross-sectoral industries in order to initiate and exhaust extended cascading systems; it is associated with (synergistic) environmental, technical, social, and economic benefits. For monitoring and controlling the development and progress of an IS system, an indicator system must be set up to standardize and assess the IS (sustainability) performance. This study aims to present a quantitative indicator system to enable the tracking of set sustainability targets of an IS system in Industrial Parks (IPs) for goal-directed IS management. The presented guiding framework encourages IP members in IS systems to set sustainability objectives and to evaluate and track their performance over time with a quantitative indicator system. In particular, established and (partly) internationally standardized methods—such as Material Flow Analysis (MFA), Material Flow Cost Accounting (MFCA), Social Network Analysis (SNA), and Life Cycle Assessment (LCA)—are used in order to place the indicator system on a solid and robust foundation and to adequately meet the multi-faceted sustainability perspectives in the form of a combinatorial application for deriving suitable quantitative indicators for all three (environmental, economic, social) dimensions of sustainability. The indicator system, once embedded in an Information Technology (IT)-supported IS tool, contributes crucially to the technology-enabled environment of IS systems, driving sustainability trajectories.

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22

Dvořák, J., Z. Wittlingerová, K. Bicanová, and J. Skaloš. "Indicators for Built-up Area Monitoring – A Case Study of the Czech Republic and the EU." Scientia Agriculturae Bohemica 48, no. 3 (September 1, 2017): 142–53. http://dx.doi.org/10.1515/sab-2017-0021.

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Abstract The present research is focused on built-up area (BUA) monitoring. The continental landscape is becoming a limited resource in today’s world, much the same as some materials and energy resources. The goal was to design simple indicators that are compatible with environmental indicators used in the analysis of material and energy flows. We have consequently proposed the indicators BUA per person and gross domestic product (GDP) demands for total BUA. We have used these indicators to evaluate the development in the Czech Republic and the situation in the EU-27 countries. The development in the Czech Republic shows a moderately smooth decrease in the BUA per person indicator value. The GDP demands for BUA indicator showed that the cessation of economic growth after 2008 slowed the process of decoupling of GDP from the BUA. Despite the low GDP in the Czech Republic, the indicator GDP demands for BUA attains lower values than for Austria or Belgium.

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23

Kovanda, Jan. "Use of Physical Supply and Use Tables for Calculation of Economy‐Wide Material Flow Indicators." Journal of Industrial Ecology 23, no. 4 (November 19, 2018): 893–905. http://dx.doi.org/10.1111/jiec.12828.

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24

Wang, Wei, Di Jiang, Dingjiang Chen, Zengbo Chen, Wenji Zhou, and Bing Zhu. "A Material Flow Analysis (MFA)-based potential analysis of eco-efficiency indicators of China's cement and cement-based materials industry." Journal of Cleaner Production 112 (January 2016): 787–96. http://dx.doi.org/10.1016/j.jclepro.2015.06.103.

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25

Wang, Peng, Ze Yi Jiang, Xin Yi Geng, and Shi Yu Hao. "Dynamic Material Flow Analysis of Steel Resources in China Based on Circular Economy Theory." Advanced Materials Research 813 (September 2013): 64–71. http://dx.doi.org/10.4028/www.scientific.net/amr.813.64.

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The circular economy (CE) is a new development strategy for China to alleviate the contradiction between rapid economic growth and the shortage of raw materials and energy. As the basic material, steel is a key driver of the world's economy. Therefore, it is essential to set up CE indicators system to understand the mechanism of steel resources role in the circular economy. In this paper, a national level material flow evaluation framework based on CE theory is presented at the first. Then steel resources national lifetime cycle diagram is built based on dynamic Material Flow Analysis (MFA) method considering the steel lifetime circular flow characteristics. Under the guidance of this diagram, the material flow results of various stages (such as production process, fabrication & manufacturing process, in-use process, etc.) of steel lifetime cycle between 2001-2010 in China is obtained, including the end-of-life scarp amount of nine downstream industries. The results indicate that China steel resources has made gratifying achievements in improving productivity, reducing energy consumption and related pollution emission, but the degree of overall circulation remains to be improved urgently. In the end, a sketch of the future relevant policy recommendations are provided.

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26

Pavolová, Henrieta, Tomáš Bakalár, Zuzana Šimková, and Alexander Tokarčík. "Model of Raw Material Exploitation for the Support of Sustainable Development." Applied Sciences 11, no. 17 (August 27, 2021): 7919. http://dx.doi.org/10.3390/app11177919.

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The interactions between the indicators of sustainable regional development due to the exploitation of raw material deposits in the Slovak Republic are the starting point for effective raw material management. The primary objective of the study is to point out the interactions of explicitly defined indicators of raw material deposits exploitation, which have an overall impact on sustainable development in the Slovak Republic. Based on the development tendencies of selected social, economic, and environmental indicators, the article defines individual indicators that create the potential for further sustainable development. For an effective evaluation of all the indicators, the analytic hierarchy process was used for the identification of the priorities of the indicators. Based on all the relevant factors and previous experience, and results of the conducted analysis, 14 positive and 14 negative indicators were identified. Based on the complex evaluation of raw material in the process of sustainable development in the Slovak Republic, negative factors were prevailing over the positive ones by a scoring rate of 0.90, and the total impact was identified as average profitability of sustainable development support. Accepting all the principles of sustainable development, a model of effective evaluation of raw material deposits and management of raw material exploitation in regional sustainable development of the Slovak Republic based on the quantification of their interactions was developed.

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27

Semančo, Pavol, and Vladimir Modrak. "Production-Oriented Cell Formation Methods and Performance Indicators: Taxonomic Review and Trends." Applied Mechanics and Materials 718 (December 2014): 185–91. http://dx.doi.org/10.4028/www.scientific.net/amm.718.185.

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Cellular manufacturing, one of the main tools of Lean Manufacturing, significantly improves material flow, which reduces the distance travelled by materials, inventory and cumulative lead times. In our study we focused on examination of the recent trends in cellular manufacturing research, and particularly the trends related to cell formation areas, objective criteria, performance measures, and development tools. The surveyed articles are organized by proposed classification scheme, and they are presented in synoptic graph diagrams. In the paper we also identify the best publication outlets for such research. Our survey on cell formation approaches identifies the major development features in cell manufacturing research area in leading journals between 2000 and 2011. Subsequently, the main findings are summarized and presented in the last part of the paper.

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28

Font Vivanco, David, Ignasi Puig Ventosa, and Xavier Gabarrell Durany. "Building waste management core indicators through Spatial Material Flow Analysis: Net recovery and transport intensity indexes." Waste Management 32, no. 12 (December 2012): 2496–510. http://dx.doi.org/10.1016/j.wasman.2012.06.010.

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29

Kovanda, Jan, Jan Weinzettel, and Tomáš Hák. "Material Flow Indicators in the Czech Republic in Light of the Accession to the European Union." Journal of Industrial Ecology 14, no. 4 (June 21, 2010): 650–65. http://dx.doi.org/10.1111/j.1530-9290.2010.00253.x.

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30

Saidani, Michael, Alissa Kendall, Bernard Yannou, Yann Leroy, and François Cluzel. "Closing the loop on platinum from catalytic converters: Contributions from material flow analysis and circularity indicators." Journal of Industrial Ecology 23, no. 5 (April 2019): 1143–58. http://dx.doi.org/10.1111/jiec.12852.

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31

Zhuravska, N. "Economic optimum basis for regulation of nature management of systems of heat and power facilities in the preparation of technical water in electricity." Ways to Improve Construction Efficiency, no. 46 (October 16, 2020): 47–55. http://dx.doi.org/10.32347/2707-501x.2020.46.47-55.

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Obtaining thermal energy at heat facilities of heat supply systems by means of reagent-free water treatment is an innovative technology that has already confirmed its right to exist, solving many economic issues of production. The necessity of creation and application of subordinate two-level integrated indicator control over the technology of efficient water treatment in the heating systems of thermal power facilities of the construction industry has been confirmed. Subordinate control tools for water treatment technology must be used consistently, using: parameters of the state level results of water magnetization of the devices used, their equivalence to specific indicators in heating systems; specific indicators, indices (structural changes) and their consistency with certain potentials by purpose. The assessment of the whole system of conceptual and graphic model of reagent-free water treatment for its direction into the heat supply system of heat and power facilities of various industries, including the construction industry, housing and communal services, is carried out by the mechanism of passive monitoring. Scientific principles concerning development of indicator control system are offered. It is established that the quantitative characteristic of the constituent material flows of heating systems, as a measure of their additive functions and response to changes in catalytic activity, determines their subordinate indicator control mechanism. Two-level control involves: 1) the relationship between the apparatus for obtaining magnetized water (parameters) and the heating system (specific indicators and their indices); 2) the relationship between specific indicators that characterize the state of material flows of heating systems and trends in material flows under the conditions of electromagnetic fields. Studies of the trend of changes in the state of material flows were carried out according to a typological number of potentials (priority level): hydrochemical, electrophysical and thermophysical potentials. The indicator control system provides engineering and environmental aspects of reagent-free water treatment of systems of thermal power facilities of the construction industry.

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32

Roessler, Markus Philipp, Eberhard Abele, and Joachim Metternich. "Simulation Based Multi-Criteria Assessment of Lean Material Flow Design Alternatives." Applied Mechanics and Materials 598 (July 2014): 661–66. http://dx.doi.org/10.4028/www.scientific.net/amm.598.661.

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In this article a procedure is introduced to improve transparency and reliability of results for the selection of material flow design alternatives including machine tools and other capital-intensive goods. In the design phase of material flow planning projects, key performance indicators (KPIs) for design alternatives including processing as well as intralogistics elements can be derived using simulation. Using the state of the art method in value stream design and simulation often volatile input data is taken into account only in the simulation itself, but not in the downstream comparison of alternative designs, which could lead to imprecise conclusions and therefore to wrong investment decisions. To overcome this issue and to consider variability in the whole simulation phase and a subsequent decision making process, a multi-criteria decision analysis (MCDA) with two fuzzy representations is proposed and discussed here with the aim of helping practitioners to get more competitive value streams. A further goal of the article is the comparison between both forms used for fuzzy representation. Using the design example of machine tool-intralogistics systems obtained results are discussed.

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33

Unterberger, Eric, Adam Wolf, and Gunther Reinhart. "A Comparison of Indicators for Self-Sufficient Energy Systems." Applied Mechanics and Materials 856 (November 2016): 11–19. http://dx.doi.org/10.4028/www.scientific.net/amm.856.11.

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Industry is one of the major energy consumers in Germany. In order to fulfil the social responsibility of the energy revolution, companies required to install and to use their own renewable energy. With the increasing set-up of renewable energy systems at the production site, these companies are interested in consuming most of the energy directly on-site. Based on a material flow simulation of the Green Factory Bavaria in Augsburg, this paper compares different indicators for the energy self-sufficiency. Finally the effect of electrical energy storage to increase the energy self-sufficiency is examined.

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34

Horvath, Balint, Miriam Bahna, and Csaba Fogarassy. "The Ecological Criteria of Circular Growth and the Rebound Risk of Closed Loops." Sustainability 11, no. 10 (May 24, 2019): 2961. http://dx.doi.org/10.3390/su11102961.

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The implementation practices of the circular economy (CE) put a strong emphasis on preventing material losses in economic processes. The general interpretation of the concept focuses on closing technological and biological cycles by reintegrating end-of-life products into production and consumption systems. Thus, “closed loops” have become a trademark of circular transition. However, this limited perception fails to cover the essence of the CE. Besides closure, the utility of material loops can be prolonged, and a conscious consumer attitude may even prevent the creation of unnecessary material flows. This paper aims at proving that the preference of closed loops would result in deadweight losses in the long run. The conducted analysis ranks EU member states according to the most anticipated material flow indicators. Then, the study presents a new methodology to measure circular efficiency based on the available ecological capacity of the countries. The outcomes show that the poorly performing actors are in fact not far from a sustainable operation. Meanwhile, the countries with the most efficient material flow values present the widest development gap to reach the ideal level of circularity.

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Кравцов, Артем, Artem Kravtsov, Владимир Коновалов, Vladimir Konovalov, Владимир Зайцев, Vladimir Zaitsev, Марина Донцова, and Marina Dontsova. "THE SPEED MODE OF AEROPRODUCT FLOW WITH PARALLEL-SEQUENTIAL SECTIONS." Bulletin Samara State Agricultural Academy 4, no. 2 (May 20, 2019): 75–83. http://dx.doi.org/10.12737/article_5cdbc098156d56.12929222.

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The aim of the research is to reduce pressure losses in the pneumatic system of the seeder with pneumatic sowing. In the production of seeders with pneumatic sowing one of the qualitative indicators of the technological process of pneumatic transportation of plant seeds and granules of oral fertilizers is the uniformity of the distribution of trans-ported bulk material from the bins with the dispenser of the sowing device to the unloading devices – nozzles of coulters. The task of distributing the material on the coulters is solved by the distributor. In the presence of trans-verse non-uniformity of feed of seeds is about 10% there is a risk of reducing productive activity of wheat to 1.0...1.5 t/ha. To ensure the quality of the specified material distribution in the design of the seeder is required to provide a number of quantitative terms. The change in the speed mode of movement of particles of bulk material affects not only the qualitative indicators of its distribution on coulters, but also the pneumatic resistance of the pneumatic con-veyor due to the turbulence of the flow, and the power consumption of the fan drive. Equations of pressure loss of pneumatic system are given. The results of the analysis of the 3D model pneumatic seeder pressure and flow rate. The flow rate at the beginning of the horizontal section of the pipe and the concentration of the sown material in the air product flow were changed in the simulation. The flow rate varied in the range of 15-25 m/s. The material con-centration varied in the range of 0-1.27 kg/kg of air. The regression equations of the average flow velocity over the sections of the pneumatic system, the fall of the static and total pressure are obtained. It is recommended to improve the design of the pneumatic system of seeders. The existing corrugated surface of the pipe does not fully cope with the task. The design of the vertical pipe requires additional structural elements that center the flow, both along the length of the pipe and at the inlet to the distributor.

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Liu, Chi-Shuan, Luo-Yan Lin, Ming-Chih Chen, and Horng-Chyi Horng. "A New Performance Indicator of Material Flow for Production Systems." Procedia Manufacturing 11 (2017): 1774–81. http://dx.doi.org/10.1016/j.promfg.2017.07.311.

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Wood, A. S., G. E. Tupholme, M. I. H. Bhatti, and P. J. Heggs. "Performance Indicators for Steady-State Heat Transfer Through Fin Assemblies." Journal of Heat Transfer 118, no. 2 (May 1, 1996): 310–16. http://dx.doi.org/10.1115/1.2825846.

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A comparative study is presented of several models describing steady-state heat flow through an assembly consisting of a primary surface (wall) and attached extended surface (fin). Attention is focused on the validity of four performance indicators. The work shows that the augmentation factor is the only indicator capable of correctly predicting the behavioral trends of the rate of heat flow through the assembly as the influencing physical parameters are varied.

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Matviychuk, Viktor, and Mykola Kolisnyk. "FORMATION OF QUALITATIVE INDICATORS OF PRODUCTS BY ROLLING STAMPING PROCESSES." ENGINEERING, ENERGY, TRANSPORT AIC, no. 4(115) (December 24, 2021): 75–83. http://dx.doi.org/10.37128/2520-6168-2021-4-8.

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The influence of rolling stamping on the service characteristics of products is investigated in the work. Based on the analysis of deformation kinematics, stress-strain state, microstructure and evaluation of deformability of workpiece material, ways to increase geometric accuracy, vacuum tightness, electrolytic stability and mechanical characteristics of product material, as well as ways to improve the material of workpieces for their subsequent processing. The influence of active friction forces on the nature of the material flow during SHO was established, which contributed to the development of new processes that allow to bring the shape and dimensions of the workpiece as close as possible to the finished part. Thus accuracy of the sizes of details corresponds to 7-11th qualities of accuracy, and roughness of the processed surfaces makes Ra = 2,5… 0,63 microns. The process of reshaping the square billets into round ones by the method of SHO is effective, which increases the utilization factor of the metal and reduces the anisotropy of its mechanical properties. The characteristic of flat anisotropy λr, adopted in sheet metal stamping as a characteristic of the ability of the material to form scallops, decreases as a result of reshaping by 70-80%. The relative difference in yield strength in the plane of the sheet decreases from 0.10-0.15 to 0.03-0.05. The ultimate tensile strain increases by 8-10%, and the uniform uniform strain - by 5-8%. This improvement in the characteristics of the material reshaped by rolling blanks leads to the fact that when drawing cylindrical products, the value of scallops decreases by 2-2.5 times, and the value of the maximum degree of drawing increases by 10-15%. This reduces the relative difference in wall thickness along the perimeter of the elongated workpiece, and the change in wall thickness along its height becomes linear. Thus, the use of SHO processes significantly improves the quality characteristics of products.

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., Suardi. "Evaluation of English Learning In Junior High School Samaturu Kolaka." International Journal of Scientific Research and Management 8, no. 04 (May 1, 2020): 1304–11. http://dx.doi.org/10.18535/ijsrm/v8i04.el05.

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Abstract The study aims to evaluate of english learning at the Junior High School 3, Samaturu Kolaka. The method used is evaluative through the flow of the gap model (discrepancy evaluation model). Data collection through interviews, document tracing, and observation. Key Informant is the principal, teacher, and student. The results showed that: (1). The ten indicators of the principles in the preparation of lesson plan is only a contemporary-oriented indicator that is not contained in the lesson plan. This is because lesson plan is based on teaching materials and teaching materials. In addition, the lesson plan does not promote social, spiritual attitudes and only focus on English language teaching materials. Because of social and spiritual attitudes are hidden curriculum and can be applied to all subjects. Even the development of character is a program of Junior High School 3, Samaturu Kolaka. (2). All step-by-step indicators in lesson plan preparation are already loaded inside the lesson plan. But there is still an unprecedented indicator such as determining a monotonous learning strategy and not self-evaluation for the teacher to improve the strategy, and its teaching method. (3). Several indicators of lesson plan implementation have been carried out well in the classroom even though it is not maximized. This is due to preliminary activities, the teacher does not explain the importance of the material to be studied and competencies that students must master. The conclusion is related to the principles, application of steps and implementation of lesson plan in the classroom, although not maximized, but has been referring to Permendikbud no. 103 year 2014 about learning on primary education and secondary education. Keywords: Evaluation, Lesson Plan, English Learning

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Stepanenko, S. P., B. І. Kotov, and I. S. Popadyuk. "Investigation of the process of pneumatic vibration separation of grain by density during one-dimensional movement of grain flow." Mehanization and electrification of agricultural, no. 14(113) (2021): 77–87. http://dx.doi.org/10.37204/0131-2189-2021-14-8.

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Annotation Purpose. Formation of a mathematical description of the process of moving grains with different density in vibro-pneumatic liquefied grain medium under the action of pulsating air flow to determine the parameters of movement and the possibility of their separation into fractions. Methods. Theoretical determination of the dependences of the motion of grains with different densities in a vibro-pneumatic grain medium with pulsating air flow determines the mathematical method of research based on the addition and numerical solution of the equations of grain motion in a pneumatic vibrating separator. The mathematical model is formed as a result of drawing up the scheme of force interaction on grain in the vibro-pneumatic liquefied grain environment and the differential equations of movement of grains which are presented by a material point and indicators characterizing physical and mechanical properties of grain environment are received. Results. The motion of the center of mass of grains is considered as the motion of a certain particle, the coordinates of which coincide with the coordinates of the moving coordinate system (x, y), and the mass of a single grain m differs from the grains of the medium in density. The change of air flow velocity and the influence of pulsating air flow on the flow of grain material moving on a vibrating perforated surface are determined. The discrete-periodic change of the flow velocity, which is fed through the perforated support surface into the layer of grain material, is analytically described. The parameters of the grain motion process in an oscillating fluidized medium are determined, which are determined by the solution of a complex system of differential equations using computational methods using a PC. Conclusions. As a result of theoretical research, the possibility of increasing the efficiency of separation of grain materials by specific gravity of grains, by intensifying the process of separation of grain material provided the use of pulsating air flows to separate mixtures on vibrating surfaces and compared with existing separators using horizontal and inclined decks grain separation efficiency material increases by 35–42%. Keywords: pulsating air flow, grain, density, trajectory, fluidized medium, separation process, harmonic law of motion.

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Antonini, Ernesto, Andrea Boeri, Massimo Lauria, and Francesca Giglio. "Reversibility and Durability as Potential Indicators for Circular Building Technologies." Sustainability 12, no. 18 (September 16, 2020): 7659. http://dx.doi.org/10.3390/su12187659.

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According to the Circularity Gap Report 2020, a mere 8.6% of the global economy wascircular in 2019. The Global Status Report 2018 declares that building construction and operationsaccounted for 36% of global final energy use and 39% of energy–related carbon dioxide (CO2)emissions. The Paris Agreement demands that the building and construction sector decarbonizesglobally by 2050. This requires strategies that minimize the environmental impact of buildingsand practices extending the lifecycle of their constituents within a circular resource flow. To ensurethat eective measures are applied, a suitable method is needed to assess compliance in materials,processes, and design strategies within circular economy principles. The study’s assumption is thatsynthetic and reliable indicators for that purpose could be based on reversibility and durabilityfeatures. The paper provides an overview of building design issues within the circular economyperspective, highlighting the diculty in finding circular technologies which are suitable to enhancebuildings’ service life while closing material loops. The results identify reversibility and durability aspotential indicators for assessing circular building technologies. The next research stage aims to furtherdevelop the rating of circularity requirements for both building technologies and entire buildings.

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Moriguchi, Yuichi. "The Basic Plan for Establishing a Recycling-Based Society: Towards a Society with Sound Material Cycles: Material Flow Indicators and their Quantitative Targets." Waste Management Research 14, no. 5 (2003): 242–51. http://dx.doi.org/10.3985/wmr.14.242.

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Petukhov, Alexander N., and Alexander F. Davydov. "Influence of washing on textile material thermal properties under exposure of an open flame and heating ele-ment heat flow." Technologies & Quality 54, no. 4 (December 23, 2021): 10–15. http://dx.doi.org/10.34216/2587-6147-2021-4-54-10-15.

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Elevated temperatures are factors causing harm to human health and life. To ensure protection, various personal protective equipment is used, which includes special protective clothing. The article discusses the heat-shielding indicators of the safety of textile material. In order to determine the heat-shielding properties of the material, various types of exposure are used – convective heat from a heating element and an open flame. Fabrics of various raw materials and surface density are used for sewing special protective clothing. Five clothes were selected for the research. The research was held under the exposure of an open flame and convective heat of heating element with a comparable heat flux density equal to 80 kW/m². Also, research was held under influence of multiple wash cycles on radiant heat transfer index and heat transfer index.

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Purba, Febriani, Ono Suparno, and Ani Suryani. "Green Productivity in the Indonesian Leather-tanning Industry." Leather and Footwear Journal 20, no. 3 (September 30, 2020): 245–66. http://dx.doi.org/10.24264/lfj.20.3.4.

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Green productivity (GP) is a strategy by which production processes are improved by efficiently using resources and materials and adverse impacts on the environment are reduced. This study aims to measure GP of an Indonesian leather-tanning industry and develop alternatives to current processes that would improve its environmental and economic impacts. Two small to medium tanneries (Tanneries A and B) in two provinces were used as a case study. Data were collected through direct observation, measurements, in-depth interviews, and activity documentation. Material flow was analyzed using a green material flow map to determine the six sources of green wastes and the environmental indicators. The GP Index (GPI) was used to measure GP. The best method by which to improve GP was determined using GPI to a ratio of GP along with expert analysis using an analytical hierarchy process. GPI at Tannery A, located in West Java, was 0.14 with economic and environmental indicators of 1.44 and 10.41, respectively. GPI at Tannery B, located in Central Java, was 0.16 with economic and environmental indicators of 1.60 and 9.99, respectively. GP in both tanneries was low because of their suboptimal use of water. High water consumption can lead to a high discharge of liquid waste. Six alternatives for Tannery A and four for Tannery B were created. According to GPI, GP ratio, and expert opinion, the best strategy by which to improve GP was water recycling in the soaking and liming processes. This strategy increased GPI at Tannery A to 0.18 and at Tannery B to 0.20.

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Hrabová, Kristýna, Petr Lehner, Pratanu Ghosh, Petr Konečný, and Břetislav Teplý. "Sustainability Levels in Comparison with Mechanical Properties and Durability of Pumice High-Performance Concrete." Applied Sciences 11, no. 11 (May 28, 2021): 4964. http://dx.doi.org/10.3390/app11114964.

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In the production of cement and concrete, mechanical and durable properties are essential, along with reasonable cost and sustainability. This study aimed to apply an evaluation procedure of the level of sustainability of mixtures of high-performance concretes (HPC) with various eco-friendly supplementary cementitious materials (SCM). The major supplementary cementitious materials (SCMs), namely, volcanic pumice pozzolan (VPP), Class C and F fly ash, ground granulated blast furnace slag of grade 120, silica fume, and metakaolin, were included. Twenty-seven concrete mixtures were analyzed using a previously presented comprehensive material sustainability indicator in a cost-effective variant. The results indicated that the rank of the concretes differed at 28, 56, and 91 days after concreting. In addition, the study showed no correlation of strength and diffusion parameters with sustainability indicators. Finally, this study will contribute to the optimal selection of mixtures of HPC with VPP in terms of sustainability, cost, and durability for future implementation in reinforced concrete bridge deck slabs and pavements. The values of sustainability indicators for pumice-based mixtures were compared with those for other SCMs, highlighting the sustainable performance of volcanic ash-based SCM.

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Cifrian, Eva, Berta Galan, Ana Andres, and Javier R. Viguri. "Material flow indicators and carbon footprint for MSW management systems: Analysis and application at regional level, Cantabria, Spain." Resources, Conservation and Recycling 68 (November 2012): 54–66. http://dx.doi.org/10.1016/j.resconrec.2012.08.007.

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Muhammad, Habeeb Sirajo, and Ibrahim Umar Salihi. "Application of the UN-Habitat Integrated Sustainable Waste Management Methodology to Evaluate the Solid Waste Management System in the City of Kano, Nigeria." International Journal of Engineering Research in Africa 38 (September 2018): 115–23. http://dx.doi.org/10.4028/www.scientific.net/jera.38.115.

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This report provides a review of municipal solid waste (MSW) management in Kano, Nigeria. It employs a number of performance indicators, which include: waste collection, controlled disposal, materials recovery and financial sustainability. Other indicators are: user inclusivity, provider inclusivity and institutional coherence. A material flow diagram indicates a large amount of waste going to the informal recovery and reuse sector. Comparisons with world cities show that Kano performs below the low-income category in terms of solid waste management (SWM). The biodegradable portion of the waste constitutes 68%, 62.5% of the total waste being generated by the household sector at a rate of 0.56 kg capita -1 day-1. The SWM system is under budgeted and with the rapid increase in population, an effective and efficient SWM system would be required.

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Wiedmann, Thomas O., Heinz Schandl, Manfred Lenzen, Daniel Moran, Sangwon Suh, James West, and Keiichiro Kanemoto. "The material footprint of nations." Proceedings of the National Academy of Sciences 112, no. 20 (September 3, 2013): 6271–76. http://dx.doi.org/10.1073/pnas.1220362110.

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Metrics on resource productivity currently used by governments suggest that some developed countries have increased the use of natural resources at a slower rate than economic growth (relative decoupling) or have even managed to use fewer resources over time (absolute decoupling). Using the material footprint (MF), a consumption-based indicator of resource use, we find the contrary: Achievements in decoupling in advanced economies are smaller than reported or even nonexistent. We present a time series analysis of the MF of 186 countries and identify material flows associated with global production and consumption networks in unprecedented specificity. By calculating raw material equivalents of international trade, we demonstrate that countries’ use of nondomestic resources is, on average, about threefold larger than the physical quantity of traded goods. As wealth grows, countries tend to reduce their domestic portion of materials extraction through international trade, whereas the overall mass of material consumption generally increases. With every 10% increase in gross domestic product, the average national MF increases by 6%. Our findings call into question the sole use of current resource productivity indicators in policy making and suggest the necessity of an additional focus on consumption-based accounting for natural resource use.

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Galkin, Andrii. "Urban environment influence on distribution part of logistics systems." Archives of Transport 42, no. 2 (June 13, 2017): 7–23. http://dx.doi.org/10.5604/01.3001.0010.0522.

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The irregularities of evolutionary development, continuous improvement of environmental component into transport and raise many unsolved problem in the fields of transport in logistics systems and material flows management. The city parameters analyses had highlighted connections with transport services technology. Also the distribution stage of the logistic chain, which consists of following market participants: incoming material flow, retailers and Transportation Company (carrier) in different cities has been considered. Transportation service is made by road transport. The paper compares results of transportation servicing in different cities and logistic chains with same technology. As performance indicator net present value has been used. Existing criteria for evaluating the effectiveness of distribution of material flows does not sufficiently take into account the time value of money and possible options for investment, so when estimating the performance of servicing of business investment indicators should be used. Paper should elucidate the impact of cities on the transport service efficacy. Practical suggestions on logistics system functioning and transportation service of retailers in urban area have been proposed. Obtained results discovered overall impact of city’s parameters (density of streets and roads network’ irregularity factor; automobilizationlevel; urban square; scheme of road network; city radius) on logistics according to model which include more than 50 parameters and allows finding regularities of changing logistics efficiency on them.

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BEN MOSBAH, Abdallah, Ruxandra Mihaela BOTEZ, Soumaya MEDINI MEDINI, and Thien-My DAO. "Artificial Neural Networks-Extended Great Deluge Model to predict Actuators Displacements for a Morphing Wing Tip System." INCAS BULLETIN 12, no. 4 (December 4, 2020): 13–24. http://dx.doi.org/10.13111/2066-8201.2020.12.4.2.

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Resin-based fiber composite materials have received attention in aerospace composite engineering, particularly in aircraft morphing structures, due to their high mechanical characteristics, such as stiffness, and because of their potential to highly reduce the structural mass of modern aircraft. Aircraft morphing is referred to as the ability of an aircraft’s surface to change its geometry in flight. The modelling of a dynamic morphing wing system is here studied. The morphing wing was controlled using four electric actuators situated inside of the wing model. The main role of these actuators was to modify the wing upper surface shape designed and manufactured with a flexible material, so that the laminar-to-turbulent flow transition point can move closer to the wing trailing edge, thus causing a minimum viscous drag, for various flow conditions. To determine the skin deflections in the four actuators points, both LVDT and dial indicator gages were positioned on the wing. Four Linear Variable Differential Transducers (LVDTs) were used to indicate the positions of the four actuators, and four Dial Indicators gages were positioned on the wing to measure the real deflections of the flexible composite skin in the four actuation points. The relationship between the Dial Indicators’ values and the LVDTs’ values for a same set-point command signal had a nondeterministic and unpredictable behavior (not a linear one). The values of the displacements given by the LVDTs were different than the values given by the Dial Indicators. In this paper, an Artificial Neural Network (ANN) model was investigated created with the aim to predict the displacements of the wing upper surface skin in real time using four actuators. The proposed model was trained using the Extended Great Deluge (EGD) algorithm.

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