On the Reliability of Systems Subject to Maintenance and Repair.

1983 ◽  
Author(s):  
Mark Brown
Keyword(s):  
Maintenance And Repair

INVESTMENTS IN THE LOCOMOTIVE COMPLEX INFRASTRUCTURE. INFRASTRUCTURE NEEDS PLANS AND FORECASTS

2020 ◽  
Vol 1 (4) ◽  
pp. 106-110
Author(s):  
A. G. YEROYAN ◽  
Keyword(s):  
Significant Role ◽  
Rolling Stock ◽  
Infrastructure Development ◽  
Electric Locomotive ◽  
Maintenance And Repair ◽  
Technological Readiness ◽  
Railway Industry ◽  
Locomotive Repair

In connection with the prospects for the development of the railway industry until 2030, a significant role in improving the technological readiness of maintenance and repair of traction rolling stock belongs to diesel, electric locomotive repair and service depots. The article considers the main directions of development and modernization of the locomotive complex infrastructure. Possible methods of financing mechanisms for investment in infrastructure development have been identified.

Layaway Procedures for U.S. Army Facilities: Inspection, Maintenance, and Repair of Historic Buildings.

1999 ◽  
Author(s):  
S. L. Hunter ◽  
D. R. Uzarski ◽  
V. E. Jenkins ◽  
D. M. Bailey ◽  
M. J. Binder
Keyword(s):  
Historic Buildings ◽  
Maintenance And Repair

Strategies of maintenance and repair of agricultural machinery

2020 ◽  
pp. 38-48
Author(s):  
Aleksey S. Dorokhov ◽  
Aleksandr V. Denisov ◽  
Aleksey A. Solomashkin ◽  
Valeriy S. Gerasimov
Keyword(s):  
Wear Rate ◽  
Technical Condition ◽  
Research Purpose ◽  
Agricultural Machinery ◽  
Maintenance And Repair ◽  
Wear Rates ◽  
Urgent Task ◽  
Machine Parts ◽  
Current Value ◽  
Agricultural Machines

Modern machines are subject to progressive wear that occurs at different rates, which leads to unpredictable failures that reduce the reliability and durability of machines. The strategy of maintenance and repair is aimed at eliminating these problems. (Research purpose) The research purpose is in analyzing the basic principles of the strategy of maintenance and repair of agricultural machinery in order to ensure control of the technical condition of machine parts. (Materials and methods) When resource diagnostics is used, , the allowable value of the parameter is set in advance for a part . This value is the tolerance that corresponds to a certain wear rate of the part. The tolerance is set based on the condition that if the current value of the controlled resource parameter during the next diagnosis is less than the set value, then such a part at the current value of the wear rate can be finalized until the next inter-control check. Taking into account the wear rate of the same type of parts from the group when determining the allowable wear during their resource diagnostics becomes an urgent task. (Results and discussions) As a result of research, the article presents "Methodology for determining the main indicators of reliability of parts of agricultural machines with different wear rates" and "Methodology for determining the tolerance system of parts of agricultural machines with different wear rates". (Conclusions) The article presents the tolerance system that reduces the probability of failure of machine parts in operation. During resource diagnostics, those parts whose resource parameters exceed the tolerance are rejected.

scholarly journals Leaching Rate of Polychlorinated Biphenyls (PCBs) from Marine Paint Chips

2021 ◽  
Author(s):  
Allen D. Uhler ◽  
Jeffery H. Hardenstine ◽  
Deborah A. Edwards ◽  
Guilherme R. Lotufo
Keyword(s):  
Polychlorinated Biphenyls ◽  
Surface Waters ◽  
Leaching Rate ◽  
Short Term ◽  
Aroclor 1254 ◽  
Maintenance And Repair ◽  
Potential Source ◽  
Vessel Bottom ◽  
Dissolved Phase ◽  
Over Time

AbstractPolychlorinated biphenyls (PCBs) were added to certain marine vessel bottom paints as a plasticizer to improve the adhesion and durability of the paint. The most common PCB formulation used to amend such paints was Aroclor 1254. Fugitive Aroclor-containing paint chips generated from vessel maintenance and repair operations represent a potential source of PCB contamination to sediments. Limited published studies indicate that Aroclor-containing paint is largely inert and exhibits low PCB leaching into water; however, the rate and degree of leaching of PCBs from paint chips have not been directly studied. This laboratory-based study evaluated the rate and extent of leaching of PCBs from paint chips into freshwater. The results of this investigation demonstrate that the rate of PCB dissolution from paint chips decreased rapidly and exponentially over time. Based on this study, it is estimated that the rate of leaching of PCBs from paint chips would cease after approximately 3 years of exposure to water. When all leachable PCBs were exhausted, it is estimated that less than 1% of the mass of PCBs in the paint chips was amenable to dissolution. The results of this experiment suggest that Aroclor-containing paint chips found in sediments are likely short-term sources of dissolved-phase PCB to pore or surface waters and that the majority of the PCBs in paint chips remain in the paint matrix and unavailable for partitioning into water. Graphic Abstract

scholarly journals The temporal fragility of infrastructure: Theorizing decay, maintenance, and repair

2020 ◽  
pp. 251484862097971
Author(s):  
Kavita Ramakrishnan ◽  
Kathleen O’Reilly ◽  
Jessica Budds
Keyword(s):  
Lived Experiences ◽  
Social Processes ◽  
Uneven Distribution ◽  
Maintenance And Repair ◽  
The Creation ◽  
Ecological Relations

Recent studies have reconceptualized infrastructure as comprising both material and social processes, thus offering insights into lived experiences, governance, and socio-spatial reordering. More specific attention to infrastructure’s temporality has challenged its supposed inertia and inevitable completeness, leading to an engagement with questions of the dynamics of infrastructure over different phases of its lifespan, and their generative effects. In this paper, we advance these debates through a focus on the processes of decay, maintenance, and repair that characterize such phases of infrastructural life, by exploring how specific infrastructures are materially shaped by, and shape, social, political, and socio-ecological arrangements. Our intervention has two related aims: first, to conceptualize decay, maintenance, and repair as both temporal phases of infrastructure’s dynamic materiality and its specific affective conditions; second, to trace how these phases of infrastructural life rework embodied labor, differentiated citizenship, and socio-ecological relations. We argue that attention to infrastructure’s “temporal fragility” elucidates the articulation between everyday capacities and desires to labor, the creation of and demands made by political constituents, and the uneven distribution of opportunities and resources.

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