Results 171 to 180 of about 3,158,311 (225)

A beam-hardening correction using dual-energy computed tomography

Physics in Medicine and Biology, 1985
The problems associated with beam hardening in X-ray transmission computed tomography (CT) have been described by Brooks and DiChiro (1976). These include the introduction of non-linear artefacts in CT images with corresponding errors of as high as 10% in CT measurements of the linear attenuation coefficient, thus severely limiting the use of CT in ...
A J, Coleman, M, Sinclair
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Electron beam surface hardening utilizing computer control

Journal of Heat Treating, 1983
Computer Controlled Electron Beam Machines, which are capable of precise beam placement and heat input, provide a means for localized surface hardening of steel. Minimal heat input to parts, which are selfquenched, reduces part distortion and eliminates post processing.
openaire   +1 more source

Game-Theoretic Algorithms for Optimal Network Security Hardening Using Attack Graphs

Adaptive Agents and Multi-Agent Systems, 2015
In network security hardening a network administrator may need to use limited resources (such as honeypots) to harden a network against possible attacks. Attack graphs are a common formal model used to represent possible attacks.
K. Durkota, V. Lisý, Christopher Kiekintveld, B. Bošanský   +3 more
semanticscholar   +1 more source

Computed tomography: beam hardening and environmental density artifact.

Radiology, 1983
Phantoms designed to simulate cysts or avascular masses and other material encountered in computed tomographic (CT) body and head scanning were used to evaluate the effect of beam hardening in a GE CT/T 8800 scanner. The phantoms were scanned before and after the addition of iodinated contrast material to various compartments within the phantoms.
S W, Young, H H, Muller, W H, Marshall
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Computer process planning of induction hardening

2001
Phases in setting up the induction hardening procedure have been discussed. For the exact definition of working parameters, computer simulation is recommended. For the axially symmetric work-pieces a special simulation program has been developed.
Cajner, Franjo, Landek, Darko
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Radiation-hardened 32-bit single board computer

16th DASC. AIAA/IEEE Digital Avionics Systems Conference. Reflections to the Future. Proceedings, 2002
Most of the cost for developing a computing solution for space and launch vehicles is in the development of the software. Thus, space-qualified computing hardware, supported by mature software development tools, is very desirable. Honeywell, under contract with the Air Force Rome Laboratory, has developed a radiation-hardened processor based on the ...
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Computer Simulation of Single-Shot Induction Hardening Processes

Heat Treating Conference, 2017
Abstract In single-shot hardening applications, heat treated components often feature a variety of geometric complexities including variable wall thicknesses, sharp diameter transitions, lightening holes, slots, etc. Due to the inherent 3D electromagnetic nature of single-shot coils and the complex geometry components which they must ...
Collin A. Russell, Valery Rudnev, Zhichao Li, B. Lynn Ferguson   +3 more
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Hardening OpenStack Cloud Platforms against Compute Node Compromises

Proceedings of the 11th ACM on Asia Conference on Computer and Communications Security, 2016
Infrastructure-as-a-Service (IaaS) clouds such as OpenStack consist of two kinds of nodes in their infrastructure: control nodes and compute nodes. While control nodes run all critical services, compute nodes host virtual machines of customers. Given the large number of compute nodes, and the fact that they are hosting VMs of (possibly malicious ...
Wai Kit Sze, Abhinav Srivastava, R. Sekar   +2 more
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Soft Computing Techniques for the Prediction and Analysis of Compressive Strength of Alkali-Activated Alumino-Silicate Based Strain-Hardening Geopolymer Composites

Silicon, 2021
K. Yaswanth, J. Revathy, P. Gajalakshmi
semanticscholar   +1 more source

Multi-material linearization beam hardening correction for computed tomography

Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 2017
Beam hardening causes cupping and streaking artifacts in computed tomographic images, the presence of such artifacts can impair both qualitative and quantitative analysis of the reconstructed data. When the scanned object is composed of a single material, it is possible to correct beam hardening artifacts using the linearization method.
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