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Journal articles on the topic 'Construction equipment, materials and supplies'
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1
Liu, Hualiang. "An Overview of Intelligent Building Systems and Construction Debugging Techniques." World Construction 3, no. 1 (August 26, 2014): 11. http://dx.doi.org/10.18686/wc.v3i1.35.
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The implementation of the intelligent building of the general contractor in charge of the project construction drawings installation and testing design, equipment, materials, supplies and transportation, pipeline construction, equipment, system debugging through the acceptance of the relevant opening and administration until delivery. Composition and engineering techniques. This paper describes the architecture of intelligent systems and concluded that the implementation of intelligent building elements
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Liu, Hualiang. "An Overview of Intelligent Building Systems and Construction Debugging Techniques." World Construction 3 (August 26, 2014): 11. http://dx.doi.org/10.18686/wcj.v3i1.4.
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The implementation of the intelligent building of the general contractor in charge of the project construction drawings installation and testing design, equipment, materials, supplies and transportation, pipeline construction, equipment, system debugging through the acceptance of the relevant opening and administration until delivery. Composition and engineering techniques. This paper describes the architecture of intelligent systems and concluded that the implementation of intelligent building elements
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Gomarn, Pittayaporn, and Jakrapong Pongpeng. "Causes of construction delay from contractors and suppliers in Thailand's oil and gas platform projects." MATEC Web of Conferences 192 (2018): 02008. http://dx.doi.org/10.1051/matecconf/201819202008.
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Construction project delays caused by contractors and suppliers are the top problems in Thailand's oil and gas industries. Recognizing this importance and their relationships between factors can help reduce the risk of delays in construction projects. Therefore, this study set out to confirm factors and inspect relationships between delay factors of contractors and suppliers. A 16 item questionnaire survey was distributed to 134 managers, engineers, and supervisors in oil and gas platform construction projects in Thailand. A confirmatory factor analysis (CFA) was performed by the use of Amos Version 20 software program. The analysis results showed that delays caused by the contractors and suppliers had high relationships, due to high regression weighs. The delays caused by the contractors included seven factors which included poor site management and supervision (17%), lack of safety rules and regulations (16%), poor communication and coordination with others (15%), poor procurement system management (15%), defective components and mistakes during construction (14%), supplier payments lateness (13%), and poor planning and scheduling (10%). The delays caused by the suppliers included six factors which included the supply of unqualified and unskilled personnel (22%), supply of low efficiency equipment (20%), late delivery of materials and equipment (20%), supply of low quality materials (16%), late supply of workers (16%), and price escalation (5%).
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Atout, Osama Mostafa. "Fulfilling of nuclear safeguards requirements for nuclear facilities at the nuclear materials authority and its role in completing the nuclear infrastructure in Egypt." Technology audit and production reserves 5, no. 4(61) (September 29, 2021): 25–34. http://dx.doi.org/10.15587/2706-5448.2021.240893.
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The object of research is applying the requirements of nuclear safeguards to the processing and mining facilities through which the Nuclear Materials Authority (NMA). One of the most problematic places is the NMA carries out its related nuclear activities as the body responsible for managing and operating those facilities, which must have a prominent role in imposing physical protection on these materials to protect them. During use, storage, or internal transportation, NMA should take all security and legal measures and precautions to prevent Nuclear materials from any seizure and its recovery in the event of any seizure. In the course of the research it is shown that the implementation of these requirements requires obtaining the necessary license to practice these activities, and that these activities are subject to the control of the Nuclear and Radiation Control Authority, by establishing a system for the safety and security of this nuclear equipment and materials. So that the system covers all equipment, tools, tasks, supplies, equipment, and materials present in any of the Authority’s projects and sectors Scientific. As a result of the research we have reached the importance of applying nuclear safeguards to nuclear facilities in completing the nuclear infrastructure in Egypt and completing the construction of the Egyptian peaceful nuclear program considering international standards issued by the International Atomic Energy Agency (IAEA). In the future, the proposed approach is In the future, the proposed approach is to establish a general framework for the application of nuclear safeguards procedures to the processing and mining facilities of the NMA. These safeguards are applied as a basis for completing the nuclear legislative infrastructure, the safety of Nuclear Facilities and fulfilling the requirements of IAEA. This is done by establishing a specialized unit that includes many engineers, geologists and chemists to collect all engineering and technological data, information, designs, and drawings for all nuclear and radiological facilities, activities, and practices existing at the authority under the safety standards written about equipment, tools, devices, supplies, and tasks.
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Aguiar, José, Sandra Cunha, and Mohammad Kheradmand. "Mortars with Phase Change Materials: Contribute to Sustainable Construction." Key Engineering Materials 634 (December 2014): 3–13. http://dx.doi.org/10.4028/www.scientific.net/kem.634.3.
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In a society with a high growth rate and increased standards of comfort arises the need to minimize the currently high energy consumption by taking advantage of renewable energy sources. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating and cooling equipment, using only the energy supplied by the sun. This paper aims to contribute to the study of mortars incorporating PCM. The main characteristics of the material and the mortars doped with PCM, will be presented. It also aims to clarify the differences in the physical and mechanical characteristics of mortars doped with different types of PCM.
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Dharmayanti, GAP Candra, Dewa Ketut Sudarsana, and Putu Mas Diah Pradnyawati. "Analysis of the Covid-19 Pandemic Impact on the Performance of Construction Projects in Denpasar City." International Journal of Civil, Mechanical and Energy Science 8, no. 4 (2022): 11–19. http://dx.doi.org/10.22161/ijcmes.84.2.
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Construction projects in Denpasar City have directly experienced the impact of the Covid-19 pandemic, which has brought about major changes in the construction sector which have been deeply felt by project stakeholders. The impacts include aspects of human resources, materials and equipment, work methods, and finances. The problems described have the potential to affect the performance of construction projects. The purpose of this research is to analyze the impact of the Covid-19 pandemic on the performance of construction projects in Denpasar City and formulate strategies to improve the performance of construction projects that are dominantly affected by the Covid-19 pandemic. Technical analysis of the data was determined using multivariate analysis with data obtained through surveys with online questionnaires and analyzed using SmartPLS software; Focus Group Discussions (FGD) and fishbone diagrams were conducted. The results of this study concluded that the Covid-19 pandemic had an impact on the performance of construction projects in Denpasar City, especially on the human resource aspect in terms of 2.5% time, 0.9% in terms of costs; material and equipment aspects in terms of time 3.0%, in terms of cost 1.2%, in terms of quality 0.1%; aspects of work methods in terms of time 3.4%, in terms of cost 0.7%, in terms of quality 0.7%; and the financial aspect in terms of costs 4.9%, in terms of time 1.5%. The Covid-19 pandemic variable that has the most impact on the performance of construction projects is the material and equipment aspect of 3.321 from the P-value calculation. Strategies to improve the performance of construction projects include providing equivalent alternative materials, studying contracts with suppliers in more detail, re-scheduling, monitoring related to material expeditions, pre-ordering first to suppliers, changing work methods, and seeking to find other heavy equipment service providers.
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Zhang, Gong Liang, and Jian Li. "Procurement Mode Research on Open Solicitation of Qualified Suppliers for the Construction of Guangzhou Asian Games Stadiums." Advanced Materials Research 317-319 (August 2011): 2482–89. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.2482.
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Open solicitation for qualified suppliers, expert assessment, establishment of qualified suppliers database, reassessment and other procurement modes are applied in bids of large-scaled public construction engineering so that contractors could select the materials according to the qualified suppliers database and an effective way could be ensured to the procurement of large public construction engineering with high technical contents, high construction costs and key roles in the operation of the system. Such modes have been applied in the renovation of Guangzhou Asian Games Stadiums during which the whole process control measures have been taken from the qualification verification, sample test, orders, manufacturing to on-site quality inspection, installation, commissioning, etc. so as to ensure the conformity of materials and electromechanical equipment to the design requirements and guarantee the construction quality.
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Ali, Layth T., Raid S. Abid Ali, and Zeyad S. M. Khaled. "Investigation of Cost-Influencing Factors Potentially Controllable by Main Contractors in Construction Projects in Iraq." Engineering and Technology Journal 38, no. 7A (July 25, 2020): 1069–76. http://dx.doi.org/10.30684/etj.v38i7a.546.
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Cost overrun in construction projects is a common phenomenon in Iraq. This might occur due to diversity of factors. This study aims to identify the factors influencing construction projects cost that are potentially controllable by main contractors. A field study through a questionnaire survey was directed to a sample of related Iraqi professional engineers from general contracting companies at both public and private sectors. Their opinions on the impact and frequency of each factor were investigated. The questionnaire offered (59) factors classified in (8) categories namely; legislations, financial and economic, design, contractual, site management, material, labor and equipment. The factors were ranked according to the highest Relative Importance Index (RII). The study revealed (10) major factors that are potentially controllable by main contractors namely; labor productivity, sub-contractors and suppliers performance, equipment productivity, site organization and distribution of equipment, experience and training of project managers, scheduling and control techniques, planning for materials supply, planning for equipment supply, materials delivery and planning for skilled labor recruitment. Recommendations to aid contractors and owners in early identification of these factors are also included in this study.
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Apatenko, Aleksey, and Nadezhda Sevryugina. "Model of optimization of materials and equipment for machinery fleet when servicing objects of reclamation systems." E3S Web of Conferences 164 (2020): 06018. http://dx.doi.org/10.1051/e3sconf/202016406018.
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Factors defining business adaptability to economic changes were identified. Creation of service clusters will provide the balance of interests for all agencies using technological machines and increase their performance. The result of the study is a solution of the optimization task aimed at determining the criteria of economic activities of a network of enterprises that service objects of amelioration with the use of various equipment. This solution enables regulating the level of materials and equipment taking into account the expected demand for repair stock and expected minimization of transportation costs for distributing stocks with estimate of the function of flow rates accounting. The system of distributing dead stocks of materials and equipment is proposed. The authors elaborated the economic-and-mathematical model for storage costs optimization when warehousing and selling unused materials and equipment. Results of testing the distribution scheme for dead stock of materials and equipment belonging to Stroytekhnika company, who is a supplier of consumables, fuel and lubricants, as well as spare parts for reclamation and road construction machinery.
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Mau, Ignatia Thomasita Bau, Atim Djazuli, and Helmy Djawahir. "CONSTRUCTION OF THE SUCCESS FACTORS OF IKAT WEAVINGS (A CASE STUDY OF AN IKAT WEAVING CRAFTSMAN UNDER THE BIA BEREK IKAT WEAVING GROUP – BELU REGENCY)." Jurnal Ilmu Sosial dan Humaniora 10, no. 3 (December 1, 2021): 407. http://dx.doi.org/10.23887/jish-undiksha.v10i3.34403.
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This study discusses the success factors in running a woven handicraft business experienced and immediately felt by several ikat craftsmen in one group of Bia Berek weaving in the city of Atambua, Belu Regency, East Nusa Tenggara. This is to direct the informant to answer all the success factors that have occurred and let the qualitative research model be used as a method in this research. The research used semi-structured interviews, and the informant reveals as widely as possible the informant regarding other factors that are also the key to success in running a business. These success factors include the proper management of current assets (supplies of woven fabrics) and fixed assets (weaving equipment and equipment and business premises), the ability to manage business turnover, cash flow management, the ability to process all business costs in the cost structure, management of revenue on weaving business, having personal savings and investing in non-bank financial services, increasing the marketing of woven fabrics, using technology for business innovation in the digital world, prioritizing the quality of woven fabrics produced, utilizing culture and tradition as business opportunities and potential, building profitable cooperation with local government of Belu Regency. The twelve factors that have been classified into financial and non-financial factors are constructed in a new model design that can be used as learning materials for micro, small and medium enterprises in improving their business by taking into account all the success factors that occur in their business.
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de Valence, Gerard. "Reframing construction within the built environment sector." Engineering, Construction and Architectural Management 26, no. 5 (June 17, 2019): 740–45. http://dx.doi.org/10.1108/ecam-02-2018-0088.
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Purpose Official statistics on the output of the construction industry capture on-site activities of contractors and sub-contractors; however, the role of the industry linking suppliers of materials, machinery, products, services and other inputs is also widely recognised. These two views have been called broad and narrow, with the narrow industry defined as on-site work and the broad industry as the supply chain of materials, products and assemblies, and professional services. An argument is made for using the term “built environment sector” (BES) for the broad industry definition of construction. The paper aims to discuss these issues. Design/methodology/approach Construction industry statistics capture the on-site activities of contractors and sub-contractors. This paper reviews research that adds to construction output the contributions of suppliers of materials, machinery and equipment, products and components, professional services and other inputs required to deliver the buildings and structures that make up the built environment. Findings The same term, “construction”, has been used in a number of ways in different definitional studies of the narrow and broad industry. The term that best encompasses the large number and range of participants in the creation and maintenance of the built environment, from suppliers to end users, is the BES. Research limitations/implications Construction economics makes an important contribution to researching the macroeconomic role of the BES. There is also a special role for construction economics in researching both the boundaries of the BES and the data available on the industries that contribute to the BES. Practical implications Measuring the BES would improve the understanding of its macroeconomic role and significance. Social implications Measuring the BES would contribute to city policies and urban planning. Originality/value The paper proposes a new approach to defining and measuring the industries that contribute to the production, maintenance and management of the built environment. It introduces a new name for the combination of those industries.
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EROKHIN, MIKHAIL N., ALEKSEI S. DOROKHOV, VLADIMIR V. KIRSANOV, and EKATERINA L. CHEPURINA. "CONCEPTUAL GROUNDS FOR THE CONSTRUCTION OF A REGIONAL MULTIFUNCTIONAL SERVICE CENTER FOR DAIRY LIVESTOCK." Agricultural engineering, no. 1 (2021): 4–10. http://dx.doi.org/10.26897/2687-1149-2021-1-4-10.
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Abstract. The paper outlines the main problems related to the technical service of machines and equipment used in dairy farming. The authors analyze the companies that provide their services to dairy farms of various sizes and forms of ownership, ranging from personal subsidiary farms to agricultural holdings. The main disadvantages of technical service of small and medium farms are shown, namely: large number and disunity of individual equipment suppliers; lack of incoming control of products and materials being in contact with milk; inconsistency in a number of cases of the proposed technical and technological solutions and equipment operation modes with the international requirements and other regulatory documents; impossibility of providing qualifi ed consulting, technical, fi nancial, legal and economic support to agricultural producers. The authors propose a structural and logistic model of a regional multifunctional service center for the livestock breeding industry, providing comprehensive technological, technical and operational services related to consulting, training, choosing the best available technologies and appropriate sets of machines. The multifunctional service center is expected to unite the disparate eff orts of regional service companies and dealers, improve the quality of services provided to commodity producers, and raise the level of production on small and medium-size farms.
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Oliferuk, S. L. "Cost structuring in order to reduce expenses of enterprises." Ways to Improve Construction Efficiency, no. 46 (October 16, 2020): 65–71. http://dx.doi.org/10.32347/2707-501x.2020.46.65-71.
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The efficiency of current costs of production resources is the basis of enterprise profitability and competitiveness. This requires annual planning and implementation of specific innovative measures to ensure economical and rational use of all production resources for all structural items and cost elements. The current costs of production resources include costs for: features of technology, organization of construction production, control of production processes, quality assurance of construction work (СW), construction management, sales of construction products. By the nature of participation in the production process, the current costs of production resources are grouped into direct and indirect costs. Of particular note are the costs of basic materials, which by share are the largest among direct (immediate) current production costs, as well as the efficient use of energy resources. In addition, author provides analysis of all components of direct costs, including the cost of basic and auxiliary materials, energy resources, wage costs, operation of machinery and equipment. Innovations and measures of economical and rational consumption of basic materials and energy resources in construction are formed in the following list: material resources - search for rhythmic suppliers, optimization of stocks, ensuring regulatory minimum tolerances, use of serviceable equipment and devices, strict control and self-control of costs, high quality for the first time, training with workers, visual check of sizes and tolerances, strict accounting and compensation for losses. Similarly, the structuring of the two main parts of indirect costs, i.e. general production and administrative, is performed. Such a detailed costs structuring allows for greater specification in the planning and implementation of innovative measures to reduce expenses and increase the level of firm profitability and competitiveness.
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Dorogan, Igor A. "Requirements management in the medical building construction." Vestnik MGSU, no. 8 (August 2019): 1046–56. http://dx.doi.org/10.22227/1997-0935.2019.8.1046-1056.
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Introduction: when designing and constructing medical buildings, it is necessary to meet a large number of mandatory requirements established in the normative documents and by the customers. Medical buildings as social facilities should meet high requirements. By their complexity, they are close to industrial facilities. Therefore, there is a necessity to manage a system of such requirements during their construction.
Materials and methods: the definition of requirements is initially given for software development. A requirements management system (RMS) in construction is a part of the project management. It was suggested to use the RMS to improve the organization of medical building construction. Normative documents and the customer’s specification establish the baseline requirements.
Results: the article developed organizational and technological models of different life cycle stages of medical buildings. The models show the interaction of the state customer, technical customer, general designer, contractors, and suppliers of medical equipment. The models include business processes related to requirements management during design, construction, and maintenance. This system contains various requirements for the buildings, references to requirements sources, and results of verification and validation of the requirements. Verification should be carried out by a team of experts at the checkout points appointed by the project manager. At each checkout, the experts check the requirements and record the results in a database. The list of requirements that are not observed at the moment of the checkout is reported to the project manager. The paper provides an example of the RMS for nuclear medicine buildings.
Conclusions: for buildings of medical organizations provided with complex medical equipment, it is necessary to create an RMS for all stages of the life cycle. The developed system of establishment, verification, and implementation of the requirements can significantly improve the quality of design and construction activities, accelerate the process of commissioning, and provide the safety of the facility. Such a system is developed and used for nuclear medicine buildings. The application of it is possible for other medical centers.
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Галак, Ірина, Олександр Добровольський, Денис Овчар, and Анна Чечет. "ЛОГІСТИКА ТА УПРАВЛІННЯ ЛАНЦЮГАМИ ПОСТАЧАНЬ В ПРОЄКТНО-ОРІЄНТОВАНОМУ КОНТЕКСТІ." Automobile Roads and Road Construction, no. 112 (November 30, 2022): 344–54. http://dx.doi.org/10.33744/0365-8171-2022-112-344-354.
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Most projects require routine and consumable materials from third parties, and planning, ordering, transporting, storing, tracking, and controlling these material resources can take a lot of time and effort, so proper logistics support is a critical necessity in project management. Therefore, the article analyzes the key changes in the 7-th edition of Project Management Body of Knowledge. It was determined that flexible approaches to project management ceased to be an addition to the standard, they became part of it, including in matters of supply chain management and project logistics. Key areas of project execution are analyzed that clearly emphasize the importance of materials, equipment, supply and logistics management in a project-oriented context and the importance of working with contractors and suppliers to plan and manage procurement and contracts. A brief overview of those industries for which project logistics management is one of the main directions for obtaining a competitive advantage and completing the project on time. The approach to planning the delivery of materials and equipment in projects, which are necessary for the construction of roads, bridges and other infrastructure, with a view to ensuring the continuity of work in the process of project management. The model estimates the amount of materials that must be available at a given time on the construction site to ensure the desired level of protection against changes in delivery dates and project progress.
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Ornelas, Fernando, Alejandro Santiago, Salvador Ibarra Martínez, Mirna Patricia Ponce-Flores, Jesús David Terán-Villanueva, Fausto Balderas, José Antonio Castán Rocha, Alejandro H. García, Julio Laria-Menchaca, and Mayra Guadalupe Treviño-Berrones. "The Internet Shopping Optimization Problem with Multiple Item Units (ISHOP-U): Formulation, Instances, NP-Completeness, and Evolutionary Optimization." Mathematics 10, no. 14 (July 19, 2022): 2513. http://dx.doi.org/10.3390/math10142513.
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In this work, we investigate the variant of the Internet Shopping Optimization Problem (ISHOP) that considers different item units. This variant is more challenging than the original problem. The original ISHOP is already known as a combinatorial NP-hard problem. In this work, we present a formal proof that the ISHOP variant considering different item units belongs to the NP-Hard complexity class. The abovementioned variant is familiar to companies and consumers who need to purchase more than one unit of a specific product to satisfy their requirements. For example, companies buy different quantities of construction materials, medical equipment, office supplies, or chemical components. We propose two new evolutionary operators (crossover and mutation) and an unfeasible solution repair method for the studied ISHOP variant. Furthermore, we produce a new benchmark of 15 synthetic instances where item prices follow a random uniform distribution. Finally, to assess our evolutionary operators, we implemented two Evolutionary Algorithms, a Genetic Algorithm (GA) and a Cellular Genetic Algorithm (CGA), and an experimental evaluation against a Water Cycle Algorithm (WCA) from the state-of-the-art. Experimental results show that our proposed GA performs well with statistical significance.
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Wang, Yan Yan, Hong Ren, and Fan Rong Ji. "Cooperative Innovation Evolutionary Game Analysis of Industrialized Building Supply Chain." Applied Mechanics and Materials 878 (February 2018): 213–18. http://dx.doi.org/10.4028/www.scientific.net/amm.878.213.
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Great changes have taken place in construction methods of industrial building relative to traditional construction. The cooperation between construction contractors, prefabricated parts suppliers and other materials and equipment suppliers in the supply chain of the industrial building can not be ignored. The evolutionary game theory can be used to explain the dynamic trend of the relationship until it is stable. The evolutionary game theory is applied to study the process and method of cooperative innovation between construction contractor and many subcontractors. Based on evolutionary game theory, the paper discusses the process and method of cooperative innovation between the construction contractors and numerous subcontractors. It focuses on the analysis of the influence of cooperative profit distribution, spillover effect, innovation subsidies and cooperation risk sharing for evolutionary stable strategy. The evolutionary game model of cooperation parties is constructed. The key indexes such as profit, risk loss, distribution of excess income and innovation cost are considered comprehensively. The results show that with the increasing of the spillover effect, innovation cooperation, suppliers’ innovation income and excess returns of cooperation innovation, the system will tend to the stability of cooperation. And with the increasing of the contractor's subsidy coefficient, the innovation cost, cooperation innovation risk cost, the system will tend to uncooperative. There exists an optimal distribution coefficient of excess income, which can strengthen the cooperation willingness of both sides. This study provides a guidance for the cooperative innovation of the supply chain participating parties.
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Cunha, Sandra, José Barroso Aguiar, Victor Ferreira, António Tadeu, and Andrzej Garbacz. "Mortars with Phase Change Materials - Part II: Durability Evaluation." Key Engineering Materials 634 (December 2014): 33–45. http://dx.doi.org/10.4028/www.scientific.net/kem.634.33.
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The industry of construction is responsible for the high consumption of raw materials, energy and waste production. As such, it becomes imperative to develop and study new constructive solutions with greater sustainable value. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reducing the use of heating and cooling equipment, using only the energy supplied by the sun. However, the incorporation of phase change materials in mortars modifies its characteristics. The main focus of this study was the durability of mortars with PCM incorporation based in different binders. The binders studied were aerial lime, hydraulic lime, gypsum and cement. For each type of binder, different mortars were developed with different content of PCM. The proportion of PCM studied was 0% and 40% of the mass of the sand. It was possible to observe that the incorporation of PCM in mortars caused differences in properties such as water absorption by capillarity, water absorption by immersion and degradation after freeze-thaw cycles.
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Song, Na, Andrew Hursthouse, Iain Mclellan, and Zhenghua Wang. "Decision Support Models for Site Remediation: An Evaluation of Industry Practice in China." Sustainability 14, no. 19 (September 20, 2022): 11811. http://dx.doi.org/10.3390/su141911811.
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China is currently facing great challenges in preventing land from further contamination by industrial activity. We evaluated the current state of business activity supporting the prevention and control of soil pollution through good waste management practice to restrict further soil contamination. The study focused on understanding drivers to improve the development of business activity in both waste management and remediation sectors in China. The status of organizations which manage solid waste and industrial operations providing remediation, professional materials, equipment, and approaches to site management are highlighted. Using questionnaires and a limited number of follow-up interviews, we consulted with remediation practitioners (>100 respondents including construction contracting workers, consultancy, equipment suppliers, and government department employees) working across China. The results identified that the site risk assessment and the wider construction phases for site remediation are typically based on guidelines from government and/or local government. The most frequently used materials for solidification or stabilization during remediation were clay minerals. Local government funds financed most remediation activities. Waste recycling would be a path to further reduce pollution from site development and its application in remediation techniques is possible. In addition to remediation methods, a strategic framework can be employed to provide decision support when assessing sites or decision-making for remediation projects. The priorities for remediation highlight that two types of soil use (arable land and land for construction) should be prioritized for remediation. This evaluation of industry practice provides useful models for wider decision-making in site remediation.
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Michalski, Paweł B. "The application of the concept of supply chain management in the construction industry." Logistics and Transport 41, no. 1 (2019): 23–30. http://dx.doi.org/10.26411/83-1734-2015-1-41-3-19.
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The innovation and practicality of SCM solutions has been used in the construction industry relatively recently. Companies and construction companies have recognized the concept of supply chain management as a way to reduce costs, improve production quality, shorten project execution time and increase scheduling flexibility. Construction Supply Chain (CSC) refers to the whole project. The links in this chain are the suppliers and recipients of raw materials, materials, machines and equipment, people (workers), money and technical documentation, as well as many different information and intangible assets that are necessary for the execution of works and structures. Well planned and developed logistics concepts and logistics management solutions provide the opportunity for efficient project execution and cost reduction related to logistics as well as total project cost. An important element in increasing the efficiency of the project is the proper coordination of the logistics processes of all its stakeholders at every stage of the investment cycle. High risk of construction investment, mortgage crisis and high customer demand - this is the real estate market nowadays. Looking for solutions, on the one hand minimizing the costs of contractors, on the other hand it is important to maintain the high quality of the product. Can CSCM be the answer to the current state of affairs?
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Liu, Lei. "Control Technology Based on Information Feedback for Construction Project Management in Civil Engineering." Advanced Materials Research 1056 (October 2014): 142–45. http://dx.doi.org/10.4028/www.scientific.net/amr.1056.142.
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The civil engineering construction is a very complicated production activities. In the whole construction process need to consume a large amount of manpower, consume a large amount of materials, use a lot of equipment, also need to deal with complex technical problems a lot. So this is for the civil engineering construction project management have strict requirements. This paper from the quality control, schedule control, cost control three aspects of the civil engineering construction project management analysis. Quality control Construction quality is the foundation of project management work, is the basic requirement of the construction of the project. Have important influence on the quality of the whole construction quality of engineering quality control. Because the civil engineering construction comprises a plurality of procedures, quality control is usually divided in time for the preparation of construction quality control, the quality control of construction process and quality control of completion and acceptance of three stages. Preparation of construction quality control of the main content is: each enterprise carefully check to participate in the project entity construction qualification, including professional subcontracting subcontracting, materialsand material suppliers; according to the basic principles of quality management, review project quality plan, quality requirements, implementationplan, including examination, treatment and other sectors to establish quality control preliminary scheme;, once appear quality problem, can quickly take thepreliminary scheme, guarantee the quality of the whole project. Figure 1 Quality process control before, during and after the event.
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Bilous, M. V. "The cluster analysis in the development of priority directions of informatization of logistics processes in the medical supply system of the Armed Forces of Ukraine." News of Pharmacy, no. 2(102) (October 19, 2021): 85–90. http://dx.doi.org/10.24959/nphj.21.69.
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Aim. To conduct the cluster analysis of the results of an expert survey for the development of priority directions of informatization of logistics processes in the medical supply system of the Armed Forces of Ukraine. Materials and methods. To achieve the goal of the study, the analysis of foreign and domestic scientific sources and the current legal documents was conducted. The methods of information retrieval, systematization, content analysis and the technology of hierarchical agglomeration cluster analysis were used. Results and discussion. By clustering the results of an expert survey on informatization of logistic processes in the medical supply system of the Armed Forces of Ukraine the distribution into seven clusters formed due to similar answers to the questionnaire was obtained. The number of clusters was determined by the dendrogram construction program without any researcher’s assumptions. The cluster analysis showed stable cluster groupings with a certain level of tightness of relations between features both within a cluster and among several clusters. This corresponds to the vision of the experts who outlined the problem on the research topic and determine the ways to solve it. Conclusions. Based on the results of the analysis of the personal composition of each cluster, a sufficiently high level of consistency of the conclusions of experts of the medical supply system of the Armed Forces of Ukraine to the need for the introduction of informatization of logistics processes has been determined. Priority directions of informatization of logistic processes in the medical supply system of the Armed Forces of Ukraine have been developed; a decisive place in these directions belongs to the implementation of a program for automatic accounting of medical supplies in the Armed Forces of Ukraine. The need for the introduction of modern software for decision-making support in the management of flow processes of providing medical supplies and equipment of the Armed Forces of Ukraine, as well as information analytical tools for the needs of the Medical Supply Directorate of the Medical Forces Command of the Armed Forces of Ukraine has been substantiated.
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Cunha, Sandra, José Aguiar, Kamil Zalegowski, Andrzej Garbacz, Patrícia Soares, Juliana Azevedo, Victor Ferreira, and António Tadeu. "Sustainable Mortars with Incorporation of Microencapsulated Phase Change Materials." Advanced Materials Research 1129 (November 2015): 621–28. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.621.
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The construction industry is responsible for high energy and raw materials consumption. Thus, it is important to minimize the high energy consumption by taking advantage of renewable energy sources and reusing industrial waste, decreasing the extraction of natural materials. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating and cooling equipment, using only the energy supplied by the sun. The simultaneous incorporation of PCM and fly ash (FA) can reduce the energetic consumption and the amount of materials landfilled. However, the addition of these materials in mortars modifies its characteristics. The main purpose of this study was the production and characterization in the fresh and hardened state of mortars with incorporation of different contents of PCM and FA. The binders studied were aerial lime, hydraulic lime, gypsum and cement. The proportion of PCM studied was 0%, 20%, 40% and 60% of the mass of the sand. The content of fly ash added to the mortars was 0%, 20%, 40% and 60% of the mass of the binder. It was possible to observe that the incorporation of PCM and fly ash in mortars caused differences in properties such as workability, microstructure, water absorption, compressive strength, flexural strength and adhesion.
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Aubrey, Leonard S., Rudolph Olson, and David D. Smith. "Development of a Phosphate - Free Reticulated Foam Filter Material for Aluminium Cast Houses." Materials Science Forum 630 (October 2009): 137–46. http://dx.doi.org/10.4028/www.scientific.net/msf.630.137.
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Filtration of molten aluminium using porous reticulated ceramic foam was developed in 1974 by SELEE Corporation. Since that time, there have been significant technical advances in filter bowl design and construction, preheat systems, development of fine pore size filters, development of compact two-stage filtration systems, filter gasket materials, and equipment automation. One area that has remained relatively unchanged has been the refractory filter material technology. The refractory material utilized by all of the major cast house filter suppliers is based on an alumina aggregate grain bonded with aluminium phosphate (AlPO4). This filter material, commonly referred to as “PBA” in the aluminium industry, has become an industry wide standard and accounts for nearly 99% of the filters supplied to cast houses worldwide. There are significant technical limitations of PBA filters in terms of refractory performance, as well as potential environmental, health and safety concerns. This paper describes the development of a cost effective replacement filter material that overcomes the limitations of PBA filters. The new material utilizes a low expansion – low modulus aggregate material and a non-phosphate bond. The result is a significant reduction in mechanical failures during use, improved filtration performance and elimination of the issue of potential environmental, health and safety concerns.
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Firmansyah, Abu Rizal, and Nina Aini Mahbubah. "IMPLEMENTASI METODE HOUSE OF RISK PADA EVALUASI KETERLAMBATAN PROYEK RENOVASI GEDUNG AULA PP3 BLITAR UM." SIGMA TEKNIKA 5, no. 2 (November 29, 2022): 233–41. http://dx.doi.org/10.33373/sigmateknika.v5i2.4591.
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CV. DDD is a company engaged in construction services. In the construction of the Pp3 Blitar Hall renovation project, State University of Malang, there was a delay in project completion which had an impact on the quality of the project. In project work, there are several things that are required to be taken into consideration including finance, equipment, materials, labor, and time. So based on these considerations, the work in a project can be carried out properly. Project management needs to be done, so that the smooth running of the project can be carried out properly and optimally. The purpose of this study is to identify risk events and risk agents the factors that cause project delays. House of Risk is the method used in this research. The results of this study are the identification of risk events against the analysis of project delays, there are twelve risk events and 15 potential causes of risk events. This research also produces scenarios of five priority mitigation strategies, namely purchasing materials planned for weekly or monthly needs, looking for closer suppliers, buying lots at lower prices and sufficient safety stock and applying the material requirements planning method to find out more details of the lead time of each material.
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Streltsov, D. V. "RUSSIAN–JAPANESE TRADE AND ECONOMIC RELATIONS: IS THERE A NEW FULCRUM?" MGIMO Review of International Relations, no. 1(46) (February 28, 2016): 93–105. http://dx.doi.org/10.24833/2071-8160-2016-1-46-93-105.
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Against the background of political chilling between Russia and Japan trade and economic cooperation objectively form a basis for a positive development of bilateral relations in the foreseeable future. The structure of mutual trade has not changed significantly for a number of years. Russia plays the role as a pivotal supplier of certain raw materials for the Japanese market, namely energy resources, non-ferrous metals, seafood and timber. From Japan Russia imports mainly passenger cars and a certain amount of industrial equipment. With regard to investment relations between Russia and Japan, there exists a serious structural problem - the two economies are interdependent from the point of view of the technological division of labor. Russia, particularly its Eastern regions, not possessing sufficient infrastructure and logistics capabilities, as well as cheap labor resources, does not have any competitive advantages for Japanese investment compared to other countries like China. The potential of Russia is mostly viewed in Japan just as an energy donor. Thus the largest prospects of investment cooperation lie in the energy sphere. One can talk of the possibility for raising Russia's share in the Japanese oil and LNG markets. This perspective is supported by the instability of the political situation in the Middle East, which is Japan's main partner for energy supplies. In this connection, large-scale investment projects in the energy field, like the construction of gas pipeline "Sakhalin - Japan" or a power bridge "Sakhalin - Hokkaido", retain their perceptiveness. However, given the political, juridical, organizational, technical and other problems, these projects are difficult for implementation at the present stage. In this situation, the allocation of a certain share for Japan in the strategic energy deposits of Siberia and the Far East and the admission of Japanese capital to the exploration and development of these deposits seem to be a realistic choice for Russian strategic planning towards Japan, as such a cooperation would not be a subject of Western sanctions against Russia. For Russia it is important to build with Japan relationship on a more long-term and lasting basis. One of the possible ways here is to conclude a bilateral economic partnership agreement.
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Handoko, Bambang, and Angga Widyas Swara. "Supply chain management performance measurement in the development of Indonesian new capital city using SCOR method." Operations Excellence: Journal of Applied Industrial Engineering 12, no. 1 (March 26, 2020): 63. http://dx.doi.org/10.22441/oe.2020.v12.i1.006.
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The current issue of the Indonesian people is that there is a discussion about the discourse of moving the new capital city. The process of moving capital city requires a lot of qualified human and material resources, but whether we can see whether it is possible for the capital city to move in a very short time. Logistics and supply chains are two things that are not separated in the process of moving goods and services. Supply chain management in the construction of new capital city includes material, heavy equipment, human resource services and suppliers. The objective of this research is to develop the framework of supply chain performance measurement using SCOR method. Through SCOR research, can be traced anywhere that needs to produce more in terms of human resources and materials needed in the future, then the government needs to build a framework of indicators that must be achieved and targeted.
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GUSAROV, VALENTIN. "THE PROSPECT OF USING OWN TPP IN POWER SUPPLY OF FEDERAL SCIENTIFIC AGROENGINEERING CENTER VIM." Elektrotekhnologii i elektrooborudovanie v APK 4, no. 41 (December 2020): 9–16. http://dx.doi.org/10.22314/2658-4859-2020-67-4-9-16.
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As industrial production expands, infrastructure develops, and new technological equipment is put into operation, energy needs increase, which means that the role of reliable energy supply to industrial enterprises increases. Electricity is used to light the territory of the enterprise, workshops, and laboratories, operate machines and mechanisms, automatically control the heat supply of premises and other technological processes. The level of reliability and security of heat and electricity supplies determines the stability of the enterprise and its economic efficiency. (Research purpose) The research purpose is in studying the economic efficiency of using own thermal power plant based on a gas turbine power unit. (Materials and methods) The article presents the advantages of using own thermal power plant that runs on natural gas. The most efficient balance of heat and electric energy production was determined. (Results and discussion) The article presents the construction of thermal power plant for the heat supply of buildings and structures defined by the project on the territory of the Federal Scientific Agroengineering Center VIM. The article considers the emerging trend of industrial enterprises building their own power plants, which make it possible to provide themselves with heat and electricity independently and guarantee more reliable operation of workshops by reducing downtime and disruptions of technological processes. (Conclusions) The use of a thermal power plant based on a gas turbine power unit will allow to get an annual profit, ensure energy independence, increase the reliability of power supply, and increase the profitability of production. Many large enterprises, pursuing economic goals, along with their own electricity supply, supply «excess» energy to centralized networks, often the level of energy supply «for export» significantly exceeds the level of their own consumption.
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Majchrzycka, Katarzyna, Małgorzata Okrasa, Agnieszka Brochocka, and Wiesława Urbaniak-Domagała. "Influence of Low-Temperature Plasma Treatment on The Liquid Filtration Efficiency of Melt-Blown PP Nonwovens in The Conditions of Simulated Use of Respiratory Protective Equipment." Chemical and Process Engineering 38, no. 2 (June 27, 2017): 195–207. http://dx.doi.org/10.1515/cpe-2017-0015.
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Abstract Filtering nonwovens produced with melt-blown technology are one of the most basic materials used in the construction of respiratory protective equipment (RPE) against harmful aerosols, including bio- and nanoaerosols. The improvement of their filtering properties can be achieved by the development of quasi-permanent electric charge on the fibres. Usually corona discharge method is utilized for this purpose. In the presented study, it was assumed that the low-temperature plasma treatment could be applied as an alternative method for the manufacturing of conventional electret nonwovens for the RPE construction. Low temperature plasma treatment of polypropylene nonwovens was carried out with various process gases (argon, nitrogen, oxygen or air) in a wide range of process parameters (gas flow velocity, time of treatment and power supplied to the reactor electrodes). After the modification, nonwovens were evaluated in terms of filtration efficiency of paraffin oil mist. The stability of the modification results was tested after 12 months of storage and after conditioning at elevated temperature and relative humidity conditions. Moreover, scanning electron microscopy and ATR-IR spectroscopy were used to assess changes in surface topography and chemical composition of the fibres. The modification of melt-blown nonwovens with nitrogen, oxygen and air plasma did not result in a satisfactory improvement of the filtration efficiency. In case of argon plasma treatment, up to 82% increase of filtration efficiency of paraffin oil mist was observed in relation to untreated samples. This effect was stable after 12 months of storage in normal conditions and after thermal conditioning in (70 ± 3)°C for 24 h. The use of low-temperature plasma treatment was proven to be a promising improvement direction of filtering properties of nonwovens used for the protection of respiratory tract against harmful aerosols.
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Pretto, Ernesto A., Edmund Ricci, Miroslav Klain, Peter Safar, Victor Semenov, Joel Abrams, Samuel Tisherman, David Crippen, and Louise Comfort. "Disaster Reanimatology Potentials: A Structured Interview Study in Armenia. III. Results, Conclusions, and Recommendations." Prehospital and Disaster Medicine 7, no. 4 (December 1992): 327–37. http://dx.doi.org/10.1017/s1049023x00039741.
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AbstractNational medical responses to catastrophic disasters have failed to incorporate a resuscitation component.Purpose:This study sought to determine the lifesaving potentials of modern resuscitation medicine as applied to a catastrophic disaster situation. Previous articles reported the preliminary results (I), and methodology (II) of a structured, retrospective interview study of the 1988 earthquake in Armenia. The present article (III) reports and discusses the definitive findings, formulates conclusions, and puts forth recommendations for future responses to catastrophic disasters anywhere in the world.Results:Observations include: 1) The lack of adequate construction materials and procedures in the Armenian region contributed significantly to injury and loss of life; 2) The uninjured, lay population together with medical teams including physicians in Armenia were capable of rapid response (within two hours); 3) Due to a lack of Advanced Trauma Life Support (ATLS) training for medical teams and of basic first-aid training of the lay public, and scarcity of supplies and equipment for extrication of casualties, they were unable to do much at the scene. As a result, an undetermined number of severely injured earthquake victims in Armenia died slowly without the benefit of appropriate and feasible resuscitation attempts.Recommendations:1) Widespread adoption of seismic-resistant building codes for regions of high seismic risk; 2) The lay public living in these regions should be trained in life-supporting first-aid (LSFA) and basic rescue techniques; 3) Community-wide emergency medical services (EMS) systems should be developed world-wide (tai-lored to the emergency needs of each region) with ATLS capability for field resuscitation; 4) Such systems be prepared to extend coverage to mass casualties; 5) National disaster medical system (NDMS) plans should provide integration of existing trauma-EMS systems into regional systems linked with advanced (heavy) rescue (public works, fire, police); and 6) New techniques and devices for victim extrication should be developed to enable rapid extrication of earthquake casualties within 24 hours.
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Yakym, R. S., and D. Yu Petryna. "ANALYSIS OF THE CAUSES OF THE SUDDEN DESTRUCTION OF THREE-CONE DRILL BITS WITH BUILT-IN ROCK-DESTRUCTION EQUIPMENT." Oil and Gas Power Engineering, no. 1(31) (June 26, 2019): 72–82. http://dx.doi.org/10.31471/1993-9868-2019-1(31)-72-82.
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Tricone drill bits with plug-in rock-cutting equipment are intended for the construction of wells in hard rocks. To the operational performance of bits, stringent requirements for wear resistance and crack resistance of bit steel, structural strength of parts of bits, and especially cones, are put forward. The scientific work involves a comprehensive analysis of the causes of the sudden failure of the rock-cutting tool, research of all factors affecting the performance and durability, and the options for selecting materials and rolled products for the manufacture of roller cone bits are proposed. A general analysis of the destruction of the cutters of spent tricone drill bits, as well as metallographic studies of the heat of steel, have been carried out. The materials from which bits are made have been investigated for the content of chemical elements and the determination of the physicomechanical properties of these steels. It is established that the causes of sudden failures of bits through the brittle destruction of cones are the inconsistency of smelting steel requirements for strength, ductility and technological – quenching. It has been found that the average value of the percentage of chemical elements in the body of the tested cone does not go beyond the limits of tolerance. By analyzing the physicomechanical and technological indicators of the studied steel smelting, increased values of strength and quenching have been established, and the ductility and impact toughness values have been reduced. The analysis of the chemical composition of steel melting did not reveal a significant dispersion of the percentage of chemical elements. Segregations and similar effects were not detected. It is established that such technical conditions allow too wide dispersion and optional value of non-metallic inclusions, and also do not regulate the presence of harmful impurities, which dramatically increase the quenching, hardness and other indicators that worsen the performance of cones. It is proposed to abandon the use of existing rolled stock and to develop and introduce a more reasonable regulatory document according to which rolled steel should be supplied for the manufacture of parts of tricone drilling bits.
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M.Aminuddin, Normadihah, Safari Mat Desa, Suriani Awang, Nasehir Khan E.M. Yahaya, Norbaya Hashim, Liew Yuk San, Siti Nor Fazillah Abdullah, and Nur Hanis Mohamad Hanapi. "An Assessment of the Potential, Suitability and Sustainability of the Sand Mining Site in the Kemaman River Basin, Terengganu Using Acoustic Doppler Current Profiler." Malaysian Journal of Applied Sciences 6, no. 2 (October 31, 2021): 48–60. http://dx.doi.org/10.37231/myjas.2021.6.2.308.
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Sand mining from the catchment basin for building is a worldwide issue. The increasing demand for sand in the construction industry has led sand suppliers to look for alternative methods by which they can obtain source of sand from the riverbed. Floodplain and river slabs can be used as new sources of sand mining. In Sungai Kemaman, during September until March a high precipitation can cause high flow in river. This high flow can cause riverbank erosion which leads to instability of river. Therefore, river erosion can probably be reduced by identifying the potential area for sand mining. This research was conducted to analyse sand capability on floodplain and riverbed by integrating resistivity method and sediment transport loads using Acoustic Doppler Current Profiler (ADCP). Resistivity survey is used in determining the availability of potential soil at the study area and the equipment could measure subsurface profile up to 80 meters depth. Meanwhile, ADCP survey is utilized to make river profiler in term of velocity meshes and riverbed depth. The primary data collected was from 20 January 2014 to 19 February 2014. The findings found that the samples trapped in the Helly-Smith grabber were majority of the samples consisted more than 93% of gravel and sand materials and from the resistivity analysis, it is verified that the surrounding materials along the Sungai Kemaman is sandy material and high potential of the sand mining site.
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Panychev, A. Yu, O. D. Pokrovskaya, A. B. Nikitin, and V. Ya Solovyova. "A branch university on the frontier of technological sovereignty." Transport Technician: Education and Practice 3, no. 4 (December 1, 2022): 364–75. http://dx.doi.org/10.46684/2687-1033.2022.4.364-375.
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The work is devoted to the study of the new role of the transport university in the conditions of anti-Russian sanctions. The paper raises such questions as “Is the politicization of science and education a challenge or a panacea? Forced deglobalization of university activities — a point of growth? The crisis for the industry is a time of opportunity?” It is shown that the mission of a modern university is leadership in the creation of fundamentally new equipment, technologies and human capital for transport.Materials from open Internet sources, tools of ecosystem and project approach, methods of system analysis, theory of synergetics and innovation management were used.The key scientific results of the work of PGUPS in 2022 aimed at ensuring the technological sovereignty of the Russian Federation are presented. The role of the scientific results obtained by PGUPS in the national economy in the following tracks is shown: new materials and technologies in construction; automation and digitalization; expert and scientific and methodological support for the implementation of large-scale transport projects; cooperation with academic and high-tech partners.It can be assumed that the intellectual potential of a branch university as a supplier of “engineering special forces” for solving engineering problems of global relevance can and should guarantee the breakthrough high-tech development of the domestic transport ecosystem.
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Merkulov, V. I., A. A. Popov, A. V. Polikarpov, and I. V. Tishchenko. "Ejector-type heat exchangers in the air conditioning in transport." Izvestiya MGTU MAMI 12, no. 1 (March 15, 2018): 38–44. http://dx.doi.org/10.17816/2074-0530-66845.
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In the modern world, the air conditioning systems have become the most widespread application and have become an everyday part of everyday life. However, due to the complexity of the construction during the designing of the air conditioning systems and the development of modern technologies, there are still many system’s assemblies that can be upgraded and improved. Along with such parameters as ergonomics and weight and size characteristics, a significant role is played by such parameters of the operation of the air conditioning systems as efficiency, reliability, resource. These parameters are particularly relevant in the context of miniaturization and work on a closed cycle in mobile transport vehicles (automotive, aircraft and ship equipment), since efficiency, mass and resource exert a determinative influence on the total cost of vehicles and the costs of its maintenance and operation. The main parameters that regulate the air conditioning systems are the temperature, flow rate and humidity of the supplied air. The article studies and compares the methods of primary cooling of hot air supplied to the helicopter's air conditioning systems, when the cabin is heated at low temperatures. Often this is done using air-to-air heat exchangers. In the materials of the article, it is proposed to consider the option of replacing one of such heat exchanger with an ejector-type heat exchanger, a description and comparison of the existing and proposed options for the modernization of the air conditioning system’s schemes, and estimate the acceptability of their implementation on the helicopter. Also, a comparative work was conducted to estimate the advantages and disadvantages of such a replacement. The primary estimated calculations of the change in the system’s parameters were implemented in the case of introduction of a replacement in all conventional load modes of a typical helicopter model. Specific features of the application of this replacement are given and additional innovations which are necessary for its implementation are pointed out. For calculations, the software complex ANSYS CFX, MathCAD, Solid Edge ST8 was used. In the course of the work, a construction and a method were revealed that provided the optimal parameters and method of implementation for the introduction of the ejector into the composition of the air conditioning system.
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Li, Long, Zhongfu Li, Xiaodan Li, and Guangdong Wu. "A review of global lean construction during the past two decades: analysis and visualization." Engineering, Construction and Architectural Management 26, no. 6 (July 15, 2019): 1192–216. http://dx.doi.org/10.1108/ecam-03-2018-0133.
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Purpose The purpose of this paper is to provide comprehensive analysis and understanding of lean construction (LC) and to help researchers to find new gaps and research opportunities and develop potential collaboration chances. Design/methodology/approach The bibliographic data were obtained in peer-reviewed journals. The science mapping analysis and social network analysis (SNA) were used to conduct the analysis and visualization. Science mapping was performed to identify the research topics, evolution and the relationships between these topics. Also, the most influential LC-related articles in each topic were identified based on the concept of H-classics. SNA was also used to explore the collaboration status of authors and to identify the core authors in the LC field. Findings The results showed that topics in the LC field are consistently and continuously changing, which also reveals the fact that the lean concept system has evolved over time to a certain extent. The topics that could form the knowledge base of the LC research field in the future are related to two thematic areas: supply chain management (SCM) and planning and scheduling. SCM focuses on developing a system where supplier and client work together in coordination to deliver materials, works, equipment and labor and other resources. Moreover, prefabrication is a new hot topic, while BIM is a well-developed and isolated topic in the last five years. This result indicates that more studies need to be conducted in the future, to promote the integration of BIM and lean practices in the construction phase, as well as to explore the value of BIM in the reduction or elimination of waste and lean project delivery. As for global collaborations, LC research has been widely pursued throughout the world. The USA and the UK play the most dominant role in the international collaboration network. Research limitations/implications Since the analysis of data takes some time, the specific results of this paper are limited to articles published in peer-reviewed journals, which leads to a certain degree of research lag. Practical implications This paper provides insights (such as major journals, institutions, key scholars, the evolution of topics, highly indexed articles and the new LC trends in the last five years) for researchers in the LC field. Originality/value This paper gives a general review of the above-mentioned literature, including the number of LC-related articles published in each year, as well as the major journals and main contributors to the field of LC.
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Goncharova, Yuliya A., and Vyacheslav A. Denisov. "FAILURES OF POLYMER PARTS OF AGRICULTURAL MACHINERY." Tekhnicheskiy servis mashin 3, no. 144 (September 2021): 146–54. http://dx.doi.org/10.22314/2618-8287-2021-59-3-146-154.
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Since the last century, polymer materials have been widely used in industry. They are increasingly being used in the construction of agricultural machinery. Simultaneously with the spread of polymer parts, there is a need to develop technologies for repairing agricultural machinery containing such parts. (Research purpose) The research purpose is in analyzing the failures of polymer parts of agricultural machinery and equipment. (Materials and methods) The article presents a study of cases of failures of polymer parts of agricultural machinery based on data received from the enterprise LLC "Rassvet" of the Rostov region, the production cooperative "Koelginskoe" of the Chelyabinsk region for 2019 and summary information from various suppliers of spare parts of agricultural machinery. (Results and discussion) The parts of the industrial water treatment filter, turbine water meters and the sprayer housing failed at LLC "Rassvet" during the period under review. In the production cooperative "Koelginskoe" the gear of the servo drive of the grain flow and the oil seal of the hydraulic cylinder of the tractor K-744 failed, and therefore it was necessary to replace the entire unit. It is unprofitable for dealers of agricultural machinery to supply parts in a single copy due to their low cost. (Conclusions) The nomenclature of polymer parts of agricultural machines that fail is quite diverse, and cases of their failures are not rare. In some cases, the replacement of these parts is impossible due to their absence from sale, and in other cases, it turns out to be unprofitable due to long delivery times or a large minimum order batch. In this regard, agricultural producers suffer significant losses, overpaying for a whole node instead of replacing one part.
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Yuriy Alekseevich, POLENOV, OGORODNIKOV Vitaliy Nikolaevich, and KISIN Aleksandr Yur’evich. "History of prospecting and development of deposits of quartz raw materials in the Urals and the prospect of their further use." NEWS of the Ural State Mining University, no. 2 (June 15, 2021): 48–59. http://dx.doi.org/10.21440/2307-2091-2021-2-48-59.
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Relevance of the work. For 60 years of hard work of quartz workers in the geological industry, Soviet geologists have fully provided the USSR industry for many years to come with piezoquartz and high-grade, highly pure quartz for the production of all types of quartz products. Much has changed over the years; and it became necessary to analyze the existing raw material base of Russia for quartz for smelting. Purpose of the work: analysis of the existing raw material base of Russia for quartz raw materials and the role of the deposits of quartz raw materials in the Ural region in solving this problem. Research methodology. The history of the use of quartz material as an industrial raw material and its application by the most developed countries of Europe is briefly outlined. It is shown that in the presence of various genetic types of quartz in the territory of Russia, the main deposits of highly pure quartz are located within the Ural region. The history of the complex and multiple reorganization of geological units that carried out prospecting, exploration, production and processing of all types of quartz raw materials from the Urals deposits is considered in detail. With the aim of centralization of exploration, mining operations, the production of industrial products from quartz and gemstones, scientific and project construction works in the Urals, the production association Uralkvartssamotsvety has been established since November 1, 1977. In terms of its technological equipment, the level of technology and organization of production, the achieved technical and economic indicators and allocations, the Uralkvartszamotsvety association was the flagship among the related associations of the USSR Ministry of Geology. Conclusions. Nowadays, the severe issue of the raw material base of quartz in Russia is the provision of the domestic industry with raw materials for the fusion of special transparent quartz glasses used primarily in microelectronics, fiber optics, and the production of high-intensity light sources. Ural had been and could continue to be the main supplier of raw materials and especially pure quartz. The reserves of these types of raw materials are significant, and the deposits are located in favorable economic and geographical areas.
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Fan, Hongqin, Hyoungkwan Kim, and Osmar R. Zaïane. "Data warehousing for construction equipment management." Canadian Journal of Civil Engineering 33, no. 12 (December 1, 2006): 1480–89. http://dx.doi.org/10.1139/l06-108.
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Equipment logistics, maintenance, and repair are important aspects of construction equipment management. A well-managed equipment fleet helps reduce downtime, as well as total maintenance and repair costs. With quickly growing fleets of equipment, large contractors tend to divert the maintenance and repair of equipment from equipment managers to project managers. As a result, the equipment managers shift their attention from operational-level decision-making to corporate-level strategic decision-making regarding equipment management, which is often a challenging job with the current equipment management system. This paper presents an equipment data warehouse and a prototype decision support system (DSS). The proposed equipment data warehouse enables equipment managers to visually analyze the equipment fleet data from different perspectives and at various level of details. The data-warehouse-based DSS facilitates high-level, fact-based decision-making regarding equipment logistics, supplies, maintenance, repair, and replacement and has higher levels of performance and flexibility than the current equipment management system.Key words: data warehouse, decision support system, equipment management, multidimensional modeling.
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Brereton, Paul, and Sue Hewitt. "Fulfilling the Hand-Arm Vibration Requirements of the EU Machinery Directive." Journal of Low Frequency Noise, Vibration and Active Control 19, no. 3 (September 2000): 115–21. http://dx.doi.org/10.1260/0263092001492877.
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The Machinery Directive was written to facilitate the establishment of the single European market by harmonising Member States' health and safety requirements for machinery so eliminating barriers to trade. The Machinery Directive specifies a hierarchy for selection of methods to eliminate risk of accident or ill-health throughout the foreseeable lifetime of the machine. Designers of new machinery are obliged to: eliminate or reduce risks as far as possible (inherently safe machinery design and construction); take the necessary protection measures in relation to risks that cannot be eliminated; and inform users of the residual risks due to any shortcomings of the protection measures adopted, indicate whether any particular training is required and specify any need to provide personal protection equipment. The Health & Safety Executive (HSE) of the United Kingdom is investigating the hand-arm vibration risks of powered hand-tools and the value of vibration information supplied with the tools. Manufacturers appear to be successfully reducing the vibration emissions of many types of tool. There are many classes of tool that have a wide range in the vibration emissions – frequently up to 4:1 between the highest and lowest emissions in a class. The data provided by manufacturers is likely to provide broad guidance as to which tools are likely to produce the most and least vibration in normal use but often fails to provide an indication of risk.
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Yi, Cui Xia, and Tao Yang. "Research of New Materials in Sports Equipment." Applied Mechanics and Materials 484-485 (January 2014): 84–88. http://dx.doi.org/10.4028/www.scientific.net/amm.484-485.84.
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Sports games and sports equipment are used in a variety of fitness training devices, equipment and supplies. Sports equipment and sports are interdependent and mutually reinforcing. The popularity of sports and sports diversification makes sports equipment type, size and so on develop a lot. Similarly, sports equipment of good quality, stable performance, safe and reliable property can not only guarantee athletics competition in fair and intense circumstances, but also raise the level to facilitate movement and create the necessary material conditions.
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Vovk, S., N. Ferents, and A. Lyn. "RELIGIOUS BUILDINGS FIRE SAFETY IN UKRAINE." Fire Safety 37 (January 6, 2021): 24–30. http://dx.doi.org/10.32447/20786662.37.2020.04.
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Problem. Religious buildings with a large number of people are fire hazardous. In total, there are 17,407 religious buildings in Ukraine. Out of them, approximately 3,000 are highly fire hazardous wooden buildings.The fire danger feature of religious buildings is open fire usage: candles, torches, lamps, underground rooms with complex planning, lack of ventilation systems. Besides, ancient religious buildings are mostly built using wooden materials. Fires occuring there are resonant, causing material and spiritual damage to the state and society. On average, about 20 fires occur each year in religious buildings, including wooden temples of historical heritage.Рurpose. Fire analysis in religious buildings in Ukraine and their occurrence causes; fire safety of religious buildings research.Preventive measures for religious building fire safety in Ukraine are prioritised by state program for emergency response. The State Emergency Service of Ukraine constantly monitors compliance with fire safety standards, which includes regular facilities inspections, personnel training control to prevent fires and reduce the consequences of fires, development, implementation, and control of technical methods of safety.Research methods. To achieve this goal, further methods were used: historical, systemic, theoretical generalization, abstract, logical, analysis, synthesis, comparative, and statistical methods.The main results. The most common shortcomings in religious building fire protection are the lack or malfunction of automatic fire alarms, power grid requirement non-compliance with the rules of the power grid, improper facility provision of with primary fire extinguishers, lack of lightning and water supplies for firefighting. In most buildings, wooden structures are not treated with refractory mortar.Fire causes and ways to prevent and improve fire safety are analyzed, namely: fire protection of religious building wooden elements, dome space fire extinguishing systems, fire alarm systems, lightning protection, safe people’s evacuation, candlesticks installation on non-combustible surfaces, primary fire extinguishing equipment, fire condition qualitative inspection of the of the heritage building, etc.Conclusions. After service, buildings must be completely deenergized, lighted candles and open fires must not be left unattended in the church. In religious buildings, it is necessary to carry out fire protection of wooden elements constructions, to install fire extinguishing systems in domed space, fire alarm system, lightning protection, to watch serviceability of electric networks. Rules of fire safety requirements for religious buildings are aimed at solving an important task - religious buildings safety. Unfortunately, due to lack of funds, the most important requirements are not implemented to improve fire safety.
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Vovk, S., N. Ferents, and A. Lyn. "RELIGIOUS BUILDINGS FIRE SAFETY IN UKRAINE." Fire Safety 37 (January 6, 2021): 24–30. http://dx.doi.org/10.32447/20786662.37.2020.04.
Full textAbstract:
Problem. Religious buildings with a large number of people are fire hazardous. In total, there are 17,407 religious buildings in Ukraine. Out of them, approximately 3,000 are highly fire hazardous wooden buildings.The fire danger feature of religious buildings is open fire usage: candles, torches, lamps, underground rooms with complex planning, lack of ventilation systems. Besides, ancient religious buildings are mostly built using wooden materials. Fires occuring there are resonant, causing material and spiritual damage to the state and society. On average, about 20 fires occur each year in religious buildings, including wooden temples of historical heritage.Рurpose. Fire analysis in religious buildings in Ukraine and their occurrence causes; fire safety of religious buildings research.Preventive measures for religious building fire safety in Ukraine are prioritised by state program for emergency response. The State Emergency Service of Ukraine constantly monitors compliance with fire safety standards, which includes regular facilities inspections, personnel training control to prevent fires and reduce the consequences of fires, development, implementation, and control of technical methods of safety.Research methods. To achieve this goal, further methods were used: historical, systemic, theoretical generalization, abstract, logical, analysis, synthesis, comparative, and statistical methods.The main results. The most common shortcomings in religious building fire protection are the lack or malfunction of automatic fire alarms, power grid requirement non-compliance with the rules of the power grid, improper facility provision of with primary fire extinguishers, lack of lightning and water supplies for firefighting. In most buildings, wooden structures are not treated with refractory mortar.Fire causes and ways to prevent and improve fire safety are analyzed, namely: fire protection of religious building wooden elements, dome space fire extinguishing systems, fire alarm systems, lightning protection, safe people’s evacuation, candlesticks installation on non-combustible surfaces, primary fire extinguishing equipment, fire condition qualitative inspection of the of the heritage building, etc.Conclusions. After service, buildings must be completely deenergized, lighted candles and open fires must not be left unattended in the church. In religious buildings, it is necessary to carry out fire protection of wooden elements constructions, to install fire extinguishing systems in domed space, fire alarm system, lightning protection, to watch serviceability of electric networks. Rules of fire safety requirements for religious buildings are aimed at solving an important task - religious buildings safety. Unfortunately, due to lack of funds, the most important requirements are not implemented to improve fire safety.
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Watchson, Deka, and Yusuf Latief. "Development of Information System for Building Maintenance of Rented Housing Based on Work Breakdown Structure with Building Information Modeling." Journal of Computational and Theoretical Nanoscience 17, no. 2 (February 1, 2020): 1014–25. http://dx.doi.org/10.1166/jctn.2020.8760.
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Numbers of rented-housing has been rapidly increased as an impact of program and policy by Indonesian government. Rented-housing are a solution for housing in urban slums and low-income communities that are subsidized by the government. It provides challenges in the post-construction phase especially building maintenance activities. Operation and Maintenance phase takes the longest and the most expensive period in building lifecycle. About 75–80% of Total Life Cycle Cost of a building is spent during operation and maintenance phase. The problems are poor quality of rented-housing, damaged buildings and not well maintained. Those problems impact high maintenance cost that must be afforded by the occupants. The problem derived by leak of information and maintenance schedule, number of maintenance personnel and competencies. This study aims to improve the performance of building maintenance of rented-housing by developing Information Systems, so the building functions as it’s designed. Information System is proposed be solution for effective data management and scheduling of during maintenance building. Data and building information are important and have to be managed in order to perform building maintenance. Scope of building maintenance can be defined dynamically by Work Breakdown Structure (WBS). Building Information Modeling (BIM) is used to handle technical data of building. Data of WBS, checking information, material and equipment information, supplier information, and building components parameters should be embedded in 3D/BIM model in order to effectively data storage on maintenance phase. The 3D/BIM object which effectively link with the information system has proposed an integration of scope management and schedule management. This research is qualitative, study case on rented-housing in Jakarta. Data obtained through literature analysis, and validated by experts to conclude the variable related to develop maintenance schedule in development of information systems. The result of the study is WBS-based Information System with BIM. Proposed Information Systems based on WBS using BIM can improve the performance of building maintenance.
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Li, Ai Min, Guo Qing Wang, and Jing Jing Zhang. "The Research on Railway Construction Project Materials Supplier Selection Model." Advanced Materials Research 919-921 (April 2014): 1503–8. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.1503.
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In recent years railway constructions are attracted many large investments, and generally 60-70% percentage of project budget are cost in the materials supplies, which are the main concern of the railway construction projects cost control. In this paper, we do some researches on suppliers choice to investigate the logic of railway construction projects supplies cost control. The structure is firstly to build the indicators of general construction project materials supplier selection, then to find criterion of general construction project materials supplier selection, and thirdly considering the projects distinctiveness to select the line with the actual situation of railway projects suppliers indicators. At last combined all the results of front researches to construct an indicator system for railway construction project materials supplier selection, and further study the supplier selection methods which are based on the indicator system and verified by an example.
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Tiwari, Akash. "Analysis of Resource Moment Approach and Release & Rehire Approach for Resource Optimization in Construction Project." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 192–200. http://dx.doi.org/10.22214/ijraset.2021.37903.
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Abstract: Building approaches frequently produce schedules which induce undesired, cost-effective resource variations in the field. Two sorts of situational limitations and resource restrictions occur often with a project manager. The resources for carrying out the tasks are required for a project. These resources comprise the necessary effort, equipment and supplies. The resources in the ideal world are infinite but typically not endless throughout the real world, and the project team needs to level off resource usage. Keywords: Resource, Levelling, Resource moment, Minimum moment method, RRH
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da Fonseca, Emílio Prado, Edmilson Antônio Pereira-Junior, Andréa Clemente Palmier, and Mauro Henrique Nogueira Guimarães Abreu. "A Description of Infection Control Structure in Primary Dental Health Care, Brazil." BioMed Research International 2021 (July 30, 2021): 1–7. http://dx.doi.org/10.1155/2021/5369133.
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Objective. This study is aimed at describing a score to assess infection control structures in Oral Health Teams (OHT) in Primary Health Care (PHC) in Brazil. Methods. Secondary data from a national external evaluation of PHC conducted in 2017 and 2018 were analyzed. The construction of the score used 14 variables, divided into the following: structural characteristics of the PHC, infection control equipment under conditions of use, and biosafety supplies in sufficient quantity. The questions were mostly dichotomous (yes/no). Descriptive analyses were carried out to characterize the OHT and factor analyses to reduce the number of observed variables to a specific number of factors. Results. Among 20,301 health units with OHT, 4,510 (22.2%) units did not have washable floors, ceilings, and walls; 8,406 (41.4%) did not have a sealer; 16,780 (82.7%) did not have taps with noncontact activation, and 4,663 (23.0%) units did not have rubber gloves. Regarding personal protective equipment (PPE), 1,618 (8.0%) units did not have a sufficient quantity of basic PPE. Three factors were defined to explain the 14 evaluated variables. The South region had the best score of infection control, while the North had the worst. Conclusions. Regional inequalities in the failures in infection control structures identified in PHC with OHT were related to the physical structure, equipment, and supplies used for infection control and the absence of PPE for OHT.
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Saputra, Arie, Gaustama Putra, and Fani Aguslita. "Pengendalian Waktu Proyek Menggunakan Metode Critical Chain Project Management (CCPM) Studi Kasus Pembangunan Proyek Irigasi Tahap II Kabupaten Aceh Barat." JURNAL TEKNIK INDUSTRI 11, no. 3 (November 30, 2021): 204–15. http://dx.doi.org/10.25105/jti.v11i3.13063.
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Intisari - Perencanaan dan pengendalian waktu proyek merupakan bagian dari manajemen proyek konstruksi secara keseluruhan dimana usaha yang sistematis untuk menentukan standar yang sesuai dengan sasaran perencanaan, merancang sistem informasi, membandingkan pelaksanaan dengan standar menganalisis kemungkinan adanya penyimpangan. PT Wirataco Mitra Mulya merupakan salah satu perusahaan yang bergerak dibidang konstruksi infrastruktur pengaspalan, pembangunan jalan dan jembatan yang bertempat di Kabupaten Aceh Barat. Masalah yang sering dihadapi dalam proyek pembangunan irigasi tahap II adalah terjadinya waste pada proyek seperti menunggu material yang diakibatkan karena keterlambatan pengiriman dari pemasok, menunggu turunnya dana karena pengajuan dana belum disetujui, metode kerja yang tidak baik sehingga menyebabkan material yang menumpuk, peralatan tidak memadai dikarenakan peralatan tidak berfungsi maksimal yang disebabkan kurangnya perawatan dan jadwal perawatan diabaikan, kualitas pekerjaan kurang baik disebabkan karena cuaca tidak mendukung pelaksanaan pekerjaan. Tujuan penelitian ini yaitu menentukan jalur kritis pada jaringan kerja pengerjaan proyek pembanguan irigasi Lhok Guci tahap II, menentukan indikator pengawasan konsumsi buffer akibat potensi timbulnya waste dan menentukan perbandingan waktu dan biaya perencanaan penjadwalan sebelum dan sesudah penerapan metode Critical Chain Project Management. Hasil penelitian menunjukan bahwa kegiatan kritis pada proyek pembangunan Irigasi Lhok Guci tahap II yaitu pekerjaan Mob/Demob Dump Truck, Mob/Demob Vibro Roller, Mob/Demob Bulldozer, Mob/Demob Sheet Foot Roller, Pembersihan Lapangan/Clearing and Grubbing, Galian Tanah (MP), Galian Tanah (ALB), Timbunan Tanah Didatangkan, diratakan, dipadatkan (ALB), Pengadaan dan Peasangan Geotextile-Geogrid Komposit dan Urungan Sirtu. Indikator pengawasan konsumsi buffer akibat potensi timbulnya waste akan berujung pada penggunaan durasi project buffer. Indikator zona pemakaian buffer yang diperoleh. Pihak pelaksana harus melakukan perencanaan tindakan pencegahan jika buffer yang terkonsumsi pada kurun waktu 15-28 hari dan segera melakukan tindakan jika buffer yang terkonsumsi pada kurun waktu 29-42 hari dan menjadikan akar permasalahan akibat potensi timbulnya waste sebagai pertimbangan dalam penentuan tindakan pencegahan terhadap konsumsi buffer dan berdasarkan penerapan critical chain project management diperoleh project buffer berdurasi 42 hari dengan kurun waktu penjadwalan proyek Irigasi Lhok Guci tahap II yaitu 409 hari menjadi 367 hari tanpa konsumsi buffer dengan pendanaan proyek sebesar Rp. 23,405,029,699belum termasuk PPN10% dan penghematan biaya tenaga kerja sebesar Rp. 124.223.914.72 tanpa konsumsi buffer. Abstract - Planning and controlling project time is part of the overall construction project management where a systematic effort to determine standards in accordance with planning objectives, designing information systems, comparing implementation with standards analyze possible deviations. PT Wirataco Mitra Mulya is a company engaged in the construction of asphalting infrastructure, road and bridge construction located in West Aceh Regency. Problems that are often faced in Phase II irrigation development projects are the occurrence of waste in projects such as waiting for materials caused by late delivery from suppliers, waiting for funds to decrease because the submission of funds has not been approved, poor working methods that cause material to accumulate, equipment is inadequate due to equipment is not functioning optimally due to lack of maintenance and neglected maintenance schedules, poor quality of work due to weather does not support the implementation of work. The purpose of this research is to determine the critical path in the work network for the second phase of the Lhok Guci irrigation development project, to determine indicators of monitoring buffer consumption due to the potential for waste generation and to determine the ratio of time and costs of scheduling planning before and after the application of the Critical Chain Project Management method. The results showed that the critical activities in the second phase of the Lhok Guci irrigation development project were the work of the Mob/Demob Dump Truck, Mob/Demob Vibro Roller, Mob/Demob Bulldozer, Mob/Demob Sheet Foot Roller, Field Cleaning/Clearing and Grubbing, Soil Excavation ( MP), Soil Excavation (ALB), Landfill Imported, leveled, compacted (ALB), Procurement and Installation of Composite Geotextile-Geogrids and Sirtu Storage. The indicator for monitoring buffer consumption due to the potential for waste will lead to the use of project buffer duration. Obtained buffer usage zone indicator. The implementer must plan preventive actions if the buffers are consumed within 15-28 days and immediately take action if the buffers are consumed within the period of 29-42 days and make the root of the problem due to the potential for waste as a consideration in determining preventive measures against buffer consumption and based on the application of critical chain project management, a project buffer of 42 days is obtained with a period of scheduling the Lhok Guci Phase Two Irrigation project, namely 409 days to 367 days without buffer consumption with project funding of Rp. 23,405,029,699 excluding 10% VAT and labor cost savings of Rp. 124,223,914.72 without buffer consumption.
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Macdonald, Marilyn. "Origins of Difficulty in the Nurse-Patient Encounter." Nursing Ethics 14, no. 4 (July 2007): 510–21. http://dx.doi.org/10.1177/0969733007077885.
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The purpose of this study was to look beyond the patient as the source of difficulty and to examine the context of care encounters for factors that contributed to the construction of difficulty in the nurse-patient encounter. The study explains the origins of difficulty in the nurse-patient encounter. This explanation broadens the thinking limits previously imposed by locating difficulty within the individual. Key elements of this explanation are: knowing the patient minimizes the likelihood of difficulty in the encounter; and families, availability of supplies and equipment, who is working, and care space changes are contextual factors that contribute to the construction of difficulty in the nurse-patient encounter. Awareness of these findings has implications for the strategies nurses employ in difficult encounters.
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Bernold, Leonhard E. "Bar Code‐Driven Equipment and Materials Tracking for Construction." Journal of Computing in Civil Engineering 4, no. 4 (October 1990): 381–95. http://dx.doi.org/10.1061/(asce)0887-3801(1990)4:4(381).
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Abbakumov, V. G., I. P. Tsibin, and V. L. Novikov. "Construction of economical linings of production equipment." Refractories 28, no. 9-10 (September 1987): 593–99. http://dx.doi.org/10.1007/bf01386646.
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