Results 21 to 30 of about 194,399 (303)

Efficiency Measurement of Maintenance Costs on Customer Service Process PT Indonesia Comnets Plus West Java

open access: yesTrikonomika, 2015
Information technology is growing rapidly. The problems arising in the conjunction magnitude of information technology devices are how to manage, maintain, and calculate the amount of required investments.
Ika Rizky Setyaningrum   +1 more
doaj   +1 more source

A review of multi-component maintenance models with economic dependence [PDF]

open access: yes, 1997
In this paper we review the literature on multi-component maintenance models with economic dependence. The emphasis is on papers that appeared after 1991, but there is an overlap with Section 2 of the most recent review paper by Cho and Parlar (1991). We
A Federgruen   +63 more
core   +1 more source

Corrective and maintenance P fertilization on sugarcane yield in multi-sites of south-central Brazil [PDF]

open access: yesRevista Brasileira de Ciência do Solo
Corrective phosphate is a usual practice in poor soils to improve P levels and yield potential. However, the broadcast P application in soils with high P fixing capacity may have low efficiency. This study evaluated sugarcane yield response to corrective
Rafael Otto   +7 more
doaj   +1 more source

THE FORMATION OF THE MAINTENANCE PROGRAM AND ITS IMPACT ON THE INCREASED LEVEL OF POWER PLANTS RELIABILITY [PDF]

open access: yesJournal of Process Management and New Technologies, 2020
The paper emphasizes the basic attitudes of complex technical system maintenance programming. Particularly it is performed an analysis and a selection of strategies for condition based maintenance.
Živoslav Adamović   +2 more
doaj   +1 more source

Simulation Model of Logistic Support to Isolated Airspace Smveillance Radar Stations

open access: yesPromet (Zagreb), 2008
A simulation model of the radar network operation of fivemilitary radar stations has been developed. Simulation waspeiformed in GPSS language and contains the time of operationof five radars through a period of one year, time of plannedpreventive ...
Tomislav Crnković   +2 more
doaj   +1 more source

Model development synchronized with data mining for rolling stock maintenance strategy

open access: yesAdvances in Mechanical Engineering, 2022
Indian metro system is comprised of many functional units for enabling smooth run of trains namely tracks, rolling stock, signaling and communication, operations and control center, projects, and design.
Priyanka Prabhakaran   +3 more
doaj   +1 more source

Really Ageing Systems Undergoing a Discrete Maintenance Optimization

open access: yesMathematics, 2022
In general, a complex system is composed of different components that are usually subject to a maintenance policy. We take into account systems containing components that are under both preventive and corrective maintenance.
Radim Briš, Pavel Jahoda
doaj   +1 more source

A probabilistic early fault detection model for a feedback machining system with multiple types of spares

open access: yesScientific Reports, 2023
This paper studies corrective and preventive maintenance to provide a quality control policy. The corrective maintenance, depending on the time, of a feedback machining system model with a finite source and standbys is presented. Moreover, the system has
Mohamed Abd Allah El-Hadidy   +1 more
doaj   +1 more source

Upacicalcet: A Novel Intravenous Calcimimetic Agent for Patients Undergoing Hemodialysis With Secondary Hyperparathyroidism

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Secondary hyperparathyroidism (SHPT) is a common complication in patients receiving maintenance dialysis, driven by calcium and phosphate metabolism disturbances. Calcimimetics are central to the management of SHPT by enhancing calcium‐sensing receptor sensitivity and reducing parathyroid hormone secretion.
Fumihiko Koiwa   +3 more
wiley   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

open access: yesFEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin   +2 more
wiley   +1 more source

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