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8/6/2019 abst1
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An Adaptive Cross-Layer Design Approach forNetwork Security Management
Abstract In traditional Open Systems Interconnection (OSI) layered model,
many security protocols in layers are proposed to provide network security.
Because security protocols among layers are lack of cooperation, system
performance degrades due to security redundancy and furthermore causes system
overloading. Therefore, the paper proposes a cross-layer design network security
management (CLDNSM) to protect system security while improve system
performance, such as CPU utilization. First, the multiple security-dimension
quantification (MSDQ) metric is proposed to evaluate holistic system security.
Then, the proposed CLDNSM aggregates system information from layers and uses
it to obtain the optimal security settings of layers according to the MSDQ metric.
The simulation result show that system performance will be improved without
sacrificing security protect compared to OSI layered model by using CLDNSM.
Finally, to adapt to dynamic environments, security constraints will be modified
automatically in a limited range to avoid system overloads, the simulation results
show that the system overloads are under control.
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Architecture for Applying Social Networking toBusiness
Social networking services that enhance communications at the personal level have
recently proliferated to the point of explosive use. Individuals in all society and
cultural settings naturally and routinely use Web 2.0 tools such as wikis, blogs and
social networking services such as Facebook or LinkedIn, for personal purposes.
The penetration of these technologies into the popular culture has been pervasive
and very successful and leads by far their use at the professional or business levels.
These personal networking services are starting to penetrate the workplace and are
being applied to business purposes, which have become a major concern to CIOs.
Chief technology executives in organizations are hard pressed to be proactive and
deploy these technologies to improve business processes, increase productivity andmaintain business competiveness. The executives are also concerned in regulating
the use of these services from a security and an IT governance perspective. In this
paper we develop architecture of social networking services applied to business
purposes as well developed a process of analysis to help CIOs understand how to
engineer the application of these technologies to their business environments in a
rational manner and in a way that produces economic value while safeguarding
security. The architecture of the social networking space applied to business needs
consists of categorizing business communication modes based on the distinctcharacteristics of communication needs. To date we have identified four major
modes of business use of these communication technologies: professional
networking, professional communication, professional knowledge bases and
professional collaboration. This paper will describe the resulting taxonomy and the
attributes of the four basic groups. Major social networking service and tools in
each of the four spaces are compared and rated against the characteristics of each
business use mode and to each other. We will describe the process by which we
assist the CIO in justifying, implementing and virally diffusing the necessary
technologies once a need is identified. The diffusion process makes use of a unique
process of identifying killer uses and killer apps. Additionally, considerations
are presented to handle the important issue of security when using social
networking tools for business purposes.
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Adaptive Critic Design for Energy Minimization of Portable
Video Communication Devices
Portable video communication devices operate on batteries with limited energysupply. Video compression is computationally intensive and energy-demanding.
Therefore, one critical issue in portable video communication system design is to
minimize the energy consumption of video encoding so as to prolong the
operational lifetime of portable video devices. In this paper, we explore advanced
methods in adaptive system control and develop an online complexity control and
energy minimization scheme for real-time video encoding. More specifically, we
introduce a set of parameters to control the computational complexity and energy
consumption of the video encoder. We consider this video encoder as a nonlinear
control system. Based on adaptive critic design, an advanced adaptive control
method recently developed in control science, we design an online control scheme
which is able to select the best configuration of complexity control parameters to
minimize the energy consumption under rate-distortion constraints, or equivalently
maximize video quality under rate and energy constraints. Our extensive
experimental results demonstrate that the proposed scheme approaches the true
optimum performance. The proposed online complexity control and energy
minimization scheme will provide an important tool for energy minimization of
portable video devices.
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