Fail-safe Approach for the V-22 Composite Proprotor Yoke

2008 ◽  
pp. 131-131-9 ◽  
Author(s):  
LK Altman ◽  
DJ Reddy ◽  
H Moore
Keyword(s):  
Fail Safe ◽  
Safe Approach

A Fail-Safe Approach to Incompatible Blood Transfusions

1970 ◽  
Vol 1 (10) ◽  
pp. 33-37
Keyword(s):  
Blood Transfusions ◽  
Fail Safe ◽  
Safe Approach

A FAIL-SAFE APPROACH TO INCOMPATIBLE BLOOD TRANSFUSIONS

1970 ◽  
Author(s):  
Robert M. Nalbandian ◽  
Jr. Camp ◽  
Conte Frank R. ◽  
Kessler Nicholas F. ◽  
Dale L.
Keyword(s):  
Blood Transfusions ◽  
Fail Safe ◽  
Safe Approach

scholarly journals An empirical study on stress-based fail-safe topology optimization and multiple load path design

2021 ◽  
Author(s):  
Micah Kranz ◽  
Julian K. Lüdeker ◽  
Benedikt Kriegesmann
Keyword(s):  
Topology Optimization ◽  
Computational Cost ◽  
Element Model ◽  
Maximum Length ◽  
Length Scale ◽  
Structural Members ◽  
Load Path ◽  
Evaluation Scheme ◽  
Fail Safe ◽  
Safe Approach

AbstractExplicitly considering fail-safety within design optimization is computationally very expensive, since every possible failure has to be considered. This requires solving one finite element model per failure and iteration. In topology optimization, one cannot identify potentially failing structural members at the beginning of the optimization. Hence, a generic failure shape is applied to every possible location inside the design domain. In the current paper, the maximum stress is considered as optimization objective to be minimized, since failure is typically driven by the occurring stresses and thus of more practical relevance than the compliance. Due to the local nature of stresses, it is presumed that the optimization is more sensitive to the choice of the failure shape than compliance-based optimization. Therefore, various failure shapes, sizes and different numbers of failure cases are investigated and compared on the basis of a general load-path-based evaluation scheme. Instead of explicitly considering fail-safety, redundant structures are obtained at much less computational cost by controlling the maximum length scale. A common and easy to implement maximum length scale approach is employed and fail-safe properties are determined and compared against the explicit fail-safe approach.

Designing Fail-Safe Biomaterials against Wear for Artificial Total Hip Replacement

2010 ◽  
Vol 6 ◽  
pp. 45-55 ◽  
Author(s):  
Zainul Huda
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Review Paper ◽  
Femoral Stem ◽  
Hard Coatings ◽  
Wear Particles ◽  
Total Hip ◽  
Frictional Forces ◽  
Fail Safe ◽  
Safe Approach

This review paper presents a fail-safe approach in designing biomaterials against wear for application in an artificial total hip replacement in view of the recent advances in orthopedic bioengineering materials. It has been established that substantially different alloys should be used for minimizing wear in bearing surfaces. Frictional forces at these rubbing counter-faces must be minimized to prevent loosening of the femoral stem and acetabular socket assembly from their positions secured by the fixation agent. A comparative analysis of various wear-resistant biomaterials resulted in the lowest production of wear particles in a total hip where a ceramic socket articulates against the ceramic ball: it produces only 0.004 cubic millimeters of ceramic wear particles. Surface modification, through the application of coatings, offers the potential to reduce the wear rate without compromising the bulk mechanical behavior of the implant material. These hard coatings were found to include diamond-like carbon, amorphous diamond, and titanium nitride.

scholarly journals Positional‐based cloning ‘fail‐safe’ approach is overpowered by wheat chromosome structural variation

2021 ◽  
Author(s):  
Ella Taagen ◽  
James Tanaka ◽  
Alvina Gul ◽  
Mark E. Sorrells
Keyword(s):  
Structural Variation ◽  
Wheat Chromosome ◽  
Fail Safe ◽  
Safe Approach

Towards a Fail-Safe Approach to Secure Databases

1980 ◽  
Author(s):  
A. D. Friedman ◽  
L. J. Hoffman
Keyword(s):  
Fail Safe ◽  
Secure Databases ◽  
Safe Approach

scholarly journals A Double Fail-Safe Approach to Prevent Tumorigenesis and Select Pancreatic β Cells from Human Embryonic Stem Cells

2019 ◽  
Vol 12 (3) ◽  
pp. 611-623 ◽  
Author(s):  
Mirza Muhammad Fahd Qadir ◽  
Silvia Álvarez-Cubela ◽  
Kinsley Belle ◽  
Tamar Sapir ◽  
Fanuel Messaggio ◽  
...  
Keyword(s):  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Human Embryonic Stem Cells ◽  
Embryonic Stem ◽  
Β Cells ◽  
Pancreatic Β Cells ◽  
Fail Safe ◽  
Safe Approach

Quantile Equivalence to Evaluate Compliance With Habitat Management Objectives

2011 ◽  
Vol 2 (2) ◽  
pp. 169-182
Author(s):  
Brian S. Cade ◽  
Pamela R. Johnson
Keyword(s):  
Confidence Intervals ◽  
Habitat Management ◽  
Spatial Scales ◽  
Canopy Cover ◽  
Equivalence Testing ◽  
National Wildlife Refuge ◽  
Testing Framework ◽  
Management Objectives ◽  
Fail Safe ◽  
Safe Approach

Abstract Equivalence estimated with linear quantile regression was used to evaluate compliance with habitat management objectives at Arapaho National Wildlife Refuge based on monitoring data collected in upland (5,781 ha; n  =  511 transects) and riparian and meadow (2,856 ha, n  =  389 transects) habitats from 2005 to 2008. Quantiles were used because the management objectives specified proportions of the habitat area that needed to comply with vegetation criteria. The linear model was used to obtain estimates that were averaged across 4 y. The equivalence testing framework allowed us to interpret confidence intervals for estimated proportions with respect to intervals of vegetative criteria (equivalence regions) in either a liberal, benefit-of-doubt or conservative, fail-safe approach associated with minimizing alternative risks. Simple Boolean conditional arguments were used to combine the quantile equivalence results for individual vegetation components into a joint statement for the multivariable management objectives. For example, management objective 2A required at least 809 ha of upland habitat with a shrub composition ≥0.70 sagebrush (Artemisia spp.), 20–30% canopy cover of sagebrush ≥25 cm in height, ≥20% canopy cover of grasses, and ≥10% canopy cover of forbs on average over 4 y. Shrub composition and canopy cover of grass each were readily met on >3,000 ha under either conservative or liberal interpretations of sampling variability. However, there were only 809–1,214 ha (conservative to liberal) with ≥10% forb canopy cover and 405–1,098 ha with 20–30% canopy cover of sagebrush ≥25 cm in height. Only 91–180 ha of uplands simultaneously met criteria for all four components, primarily because canopy cover of sagebrush and forbs was inversely related when considered at the spatial scale (30 m) of a sample transect. We demonstrate how the quantile equivalence analyses also can help refine the numerical specification of habitat objectives and explore specification of spatial scales for objectives with respect to sampling scales used to evaluate those objectives.

Fail-Safe Model of Interaction of Autonomous Systems in Global Networks

2006 ◽  
Vol 65 (3) ◽  
pp. 243-251
Author(s):  
I. M. Aliev
Keyword(s):  
Autonomous Systems ◽  
Global Networks ◽  
Fail Safe ◽  
Safe Model

Double Fail-Safe Attitude Control System for Artificial Meteor Microsatellite ALE-1

2021 ◽  
Vol 19 (1) ◽  
pp. 9-16
Author(s):  
Shinya FUJITA ◽  
Yuji SATO ◽  
Toshinori KUWAHARA ◽  
Yuji SAKAMOTO ◽  
Yoshihiko SHIBUYA ◽  
...  
Keyword(s):  
Control System ◽  
Attitude Control ◽  
Attitude Control System ◽  
Fail Safe
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