Cross-Layer Reliability of Computing Systems

2020 ◽  
Keyword(s):  
Cross Layer ◽  
Computing Systems

scholarly journals Cross-Layer Design for Mission-Critical IoT in Mobile Edge Computing Systems

2019 ◽  
Vol 6 (6) ◽  
pp. 9360-9374 ◽  
Author(s):  
Changyang She ◽  
Yifan Duan ◽  
Guodong Zhao ◽  
Tony Q. S. Quek ◽  
Yonghui Li ◽  
...  
Keyword(s):  
Edge Computing ◽  
Cross Layer ◽  
Cross Layer Design ◽  
Mobile Edge Computing ◽  
Computing Systems ◽  
Mission Critical

A Fully Reconfigurable Approach to Emergency Management

2013 ◽  
Vol 4 (1) ◽  
pp. 80-100
Author(s):  
Daniele Tarchi ◽  
Valeria Petrini ◽  
Giovanni Emanuele Corazza
Keyword(s):  
Emergency Management ◽  
Well Being ◽  
Future Trend ◽  
Cross Layer ◽  
Cognitive Approach ◽  
Computing Systems ◽  
Autonomic Networking ◽  
The Past ◽  
Information And Communication ◽  
Ict Infrastructure

Emergency management is one of the most important areas where technology innovation has direct impact on social well-being and sustainability. In the past few years, Information and Communication Technology (ICT) has proved to be instrumental to improve emergency management with particular focus on resilience, rapidity of response, adaptability to situations. To these ends, joint optimization of communication and computing is a promising cross-layer approach. Indeed, this paper is focused on the consideration of both cognitive and autonomic networking approaches when deploying an emergency management system. The cognitive approach was initially considered specifically for wireless communications, while the autonomic approach was initially introduced for managing complex computing systems; however, they share several similarities in dealing with fully reconfigurable systems. The future trend is to expand their influence toward the global optimization of the ICT infrastructure, as the authors show in this paper for the specific case of emergency management systems.

Artefact in 20Å-Resolution Electron Images of Negatively Stained Twodimensional Membrane Protein Crystals

1982 ◽  
Vol 40 ◽  
pp. 92-93
Author(s):  
Douglas L. Dorset ◽  
Barbara Moss
Keyword(s):  
Electron Scattering ◽  
Cross Correlation ◽  
Transmission Function ◽  
Group Symmetry ◽  
Asymmetric Structure ◽  
Object Model ◽  
Phase Object ◽  
Computing Systems ◽  
Resolution Electron ◽  
Plane Group

A number of computing systems devoted to the averaging of electron images of two-dimensional macromolecular crystalline arrays have facilitated the visualization of negatively-stained biological structures. Either by simulation of optical filtering techniques or, in more refined treatments, by cross-correlation averaging, an idealized representation of the repeating asymmetric structure unit is constructed, eliminating image distortions due to radiation damage, stain irregularities and, in the latter approach, imperfections and distortions in the unit cell repeat. In these analyses it is generally assumed that the electron scattering from the thin negativelystained object is well-approximated by a phase object model. Even when absorption effects are considered (i.e. “amplitude contrast“), the expansion of the transmission function, q(x,y)=exp (iσɸ (x,y)), does not exceed the first (kinematical) term. Furthermore, in reconstruction of electron images, kinematical phases are applied to diffraction amplitudes and obey the constraints of the plane group symmetry.

Recovery boiler sootblowers: History and technological advances

TAPPI Journal ◽  
2015 ◽  
Vol 14 (1) ◽  
pp. 51-60
Author(s):  
HONGHI TRAN ◽  
DANNY TANDRA
Keyword(s):  
Cfd Modeling ◽  
Computing Systems ◽  
The Past ◽  
Technological Advances ◽  
Recovery Boilers ◽  
Computational Fluid Dynamics Cfd ◽  
Recovery Boiler ◽  
Steam Parameters ◽  
Insight Into ◽  
Deposit Removal

Sootblowing technology used in recovery boilers originated from that used in coal-fired boilers. It started with manual cleaning with hand lancing and hand blowing, and evolved slowly into online sootblowing using retractable sootblowers. Since 1991, intensive research and development has focused on sootblowing jet fundamentals and deposit removal in recovery boilers. The results have provided much insight into sootblower jet hydrodynamics, how a sootblower jet interacts with tubes and deposits, and factors influencing its deposit removal efficiency, and have led to two important innovations: fully-expanded sootblower nozzles that are used in virtually all recovery boilers today, and the low pressure sootblowing technology that has been implemented in several new recovery boilers. The availability of powerful computing systems, superfast microprocessors and data acquisition systems, and versatile computational fluid dynamics (CFD) modeling capability in the past two decades has also contributed greatly to the advancement of sootblowing technology. High quality infrared inspection cameras have enabled mills to inspect the deposit buildup conditions in the boiler during operation, and helped identify problems with sootblower lance swinging and superheater platens and boiler bank tube vibrations. As the recovery boiler firing capacity and steam parameters have increased markedly in recent years, sootblowers have become larger and longer, and this can present a challenge in terms of both sootblower design and operation.

Methods of the multiparametric adaptation of spaceborne control and computing systems with separate majority reservation

1999 ◽  
Vol 5 (5-6) ◽  
pp. 81-91
Author(s):  
V.S. Kharchenko ◽  
◽  
A.P. Zenin ◽  
V.V. Sklyar
Keyword(s):  
Computing Systems
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