Results 31 to 40 of about 1,990,178 (318)

A testing-coverage software reliability model considering fault removal efficiency and error generation. [PDF]

open access: yesPLoS ONE, 2017
In this paper, we propose a software reliability model that considers not only error generation but also fault removal efficiency combined with testing coverage information based on a nonhomogeneous Poisson process (NHPP).
Qiuying Li, Hoang Pham
doaj   +1 more source

Availability of Parallel Triplicated Redundancy Models With Imperfect Switchovers and Interrupted Repairs

open access: yesIEEE Access, 2018
This paper presents the analysis of the three parallel triplicated redundancy models: model with one active and two standby components, model with one standby and two active components, and model with three active components.
Yutae Lee
doaj   +1 more source

Exploration of the causes of cerebrospinal fluid leakage after endoscopic endonasal surgery for sellar and suprasellar lesions and analysis of risk factors

open access: yesFrontiers in Surgery, 2022
ObjectivePostoperative cerebrospinal fluid (CSF) leakage following endoscopic endonasal surgery (EES) is a frequent complication. This study aims to identify potential risk factors of postoperative CSF leakage.MethodsA retrospective review of 360 ...
Yicheng Xiong   +8 more
doaj   +1 more source

Maintenance Modeling for a Multi-State System Under Competing Failures and Imperfect Repairs

open access: yesMathematics
A condition-based maintenance modeling approach is proposed for a multi-state system under competing failures and imperfect repairs. The system experiences three states (normal, defective and failed) over its lifecycle. Two competing failure processes, i.
Yanjing Zhang, Xiaohua Meng
doaj   +1 more source

Imperfect Maintenance Policy for a Two-Machine One-Buffer System Based on Markov Decision Process

open access: yesShanghai Jiaotong Daxue xuebao, 2021
To solve the problem of machine maintenance optimization of degraded systems, the preventive maintenance policy of a two-machine one-buffer production system is studied. First, random degradations of both machines are considered.
TIAN Xueyan, WANG Mengya, PAN Ershun
doaj   +1 more source

Nonparametric Methods for Imperfect Repair Models

open access: yesThe Annals of Statistics, 1992
An appropriate probability model for the age-dependent minimal repair model of \textit{H. W. Block}, \textit{W. S. Borges} and \textit{T. H. Savits} [J. Appl. Probab. 22, 370-385 (1985; Zbl 0564.60084)] is developed and a counting process approach is used to extend the large sample theorems of \textit{L. R. Whitaker} and \textit{F. J. Samaniego} [J. Am.
Hollander, Myles   +2 more
openaire   +2 more sources

Imperfect Repair Strategies for Two-Dimensional Warranty

open access: yes, 2010
When a repairable product under warranty fails, the manufacturer (warrantor) has the choice to either repair or replace the failed product. When repairing a failed product, the degree of repair which affects the working condition of the product can vary,
Varnosafaderani, Sima Rouhollahi   +1 more
core   +1 more source

Safety and Effectiveness of a High‐Dose, Tailored Tissue Plasminogen Activator Therapy Protocol: A Joint Pediatric Hematology and Cardiac ICU Quality Improvement Initiative Analysis

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Pediatric thromboembolism is increasingly encountered in critical care. Systemic thrombolysis with tissue plasminogen activator (tPA) facilitates vessel or valve patency, yet pediatric‐specific protocols remain undefined, and safety concerns persist. Objective To evaluate the efficacy and safety of a tailored, prolonged systemic tPA
Eran Shostak   +5 more
wiley   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Yeast pol4 promotes tel1-regulated chromosomal translocations. [PDF]

open access: yesPLoS Genetics, 2013
DNA double-strand breaks (DSBs) are one of the most dangerous DNA lesions, since their erroneous repair by nonhomologous end-joining (NHEJ) can generate harmful chromosomal rearrangements.
Jose F Ruiz   +4 more
doaj   +1 more source

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