Results 91 to 100 of about 6,305,091 (339)

Reason Maintenance - Conceptual Framework [PDF]

open access: yes, 2009
This paper describes the conceptual framework for reason maintenance developed as part of ...
Bry, François, Kotowski, Jakub
core   +1 more source

Aviation Operators’ Response Plan to Overcome the Crisis in the Aviation Industry Caused by COVID-19

open access: yesHanggong uju uihakoeji, 2020
The coronavirus infectious disease-19 (COVID-19) pandemic has had a profound impact on the aviation industry. In order to overcome this crisis, airlines have made their efforts in various fields. Therefore, we tried to summarize these efforts of airlines.
In-kyu Lim
doaj   +1 more source

In vivo evidence for glycyl radical insertion into a catalytically inactive variant of pyruvate formate‐lyase

open access: yesFEBS Letters, EarlyView.
Dimeric pyruvate formate‐lyase cleaves pyruvate using a radical‐based mechanism. G734 serves as a radical storage location, and the radical is transferred to the catalytic C419 residue. Mutation of the C418‐C419 pair causes loss of enzyme activity, but does not impede radical introduction onto G734. Therefore, cis‐ but not trans‐radical transfer occurs
Michelle Kammel   +2 more
wiley   +1 more source

Automated preventive maintenance program [PDF]

open access: yes, 1971
Maintenance program which is concise and inexpensive to operate adapts to almost any system that has a FORTRAN compiler. Program operates on a stored data base with an output consisting of scheduling information and various management ...
Cea, E. J., Grieger, T. H.
core   +1 more source

P‐glycoprotein modulates the fluidity gradient of the plasma membrane of multidrug resistant CHO cells

open access: yesFEBS Letters, EarlyView.
To explore the impact of the overexpression of the multidrug‐transporter P‐glycoprotein (ABCB1) on membrane fluidity, we compared the transversal gradient of mobility and microviscosity in plasma membranes of drug‐sensitive Chinese hamster ovary cells (AuxB1) and their multidrug‐resistant derivatives (B30) using the fluorescent n‐(9‐anthroyloxy) fatty ...
Roger Busche   +2 more
wiley   +1 more source

Optimization of satellite resource scheduling under regional target coverage conditions

open access: yesOpen Astronomy, 2022
This study presented a mathematical description of an arbitrary shape area, and after analyzing the characteristics of the near-polar orbital co-ground trajectory constellation that satisfies the revisit interval constraint, an optimization model of the ...
Liu Kaixi   +5 more
doaj   +1 more source

Macrophages and the maintenance of homeostasis

open access: yesCellular & Molecular Immunology, 2020
There have been many chapters written about macrophage polarization. These chapters generally focus on the role of macrophages in orchestrating immune responses by highlighting the T-cell-derived cytokines that shape these polarizing responses. This bias
D. Mosser   +2 more
semanticscholar   +1 more source

Evolutionary interplay between viruses and R‐loops

open access: yesFEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi   +4 more
wiley   +1 more source

Model based decision support for planning of road maintenance [PDF]

open access: yes, 1996
In this article we describe a Decision Support Model, based on Operational Research methods, for the multi-period planning of maintenance of bituminous pavements.
van Harten, Aart, Worm, J.M., Worm, J.M.
core   +3 more sources

Surplus value quantification of overdue medical devices based on Kohonen network algorithm

open access: yesScientific Reports
With the continuous updating and progress of medical equipment, the overdue medical device has problems such as management difficulties, resource waste, and potential security risks.
Xiaomei Tan   +3 more
doaj   +1 more source

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