REAL-TIME INFORMATION ASSURANCE Security Architecture Approaches

Abstract. There are multiple approaches to capturing security architecture information. Each framework and taxonomy has strengths and weaknesses that lend themselves to different tasks. The purpose of this paper is to provide information on some approaches with suggested improvements. The choice of architecture methodology can increase efficiency or diminish it. It is necessary to understand which methodology provides the most effective approach. 1

ABSTRACT Visualizing Data with Motion

This paper describes an experimental study of three perceptual properties of motion: flicker, direction, and velocity. Our goal is to understand how to apply these properties to represent data in a visualization environment. Results from our experiments show that all three properties can encode multiple data values, but that minimum visual differences are needed to ensure rapid and accurate target detection: flicker must be coherent and must have a cycle length of 120 milliseconds or greater, direction must differ by at least 20 ◦, and velocity must differ by at least 0.43 ◦ of subtended visual angle. We conclude with an overview of how we are applying our results to real-world data, then discuss future work we plan to pursue. CR Categories: H.1.2 [Models and Principles]: User/Machine Systems—Human factors, human information processing; I.3.

Vv Of Advanced Systems At

this document: . The term "formal testing" has two meanings. Traditionally, "formal testing" has been used to describe an official test occurring at the end of each life cycle phase and demonstrating that software is ready for intended use. It includes the following: With the invention of more advanced software, the term "formal testing" also refers to a type of mathematical testing using Formal Methods. Formal Methods include the following types of tests: Therefore, to avoid any confusion in this document, the traditional use of "formal testing" has been replaced with the term "official testing". The term "formal testing" used in this document means formal mathematical testing (i.e. Formal Methods

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Command and Control Grid Systems - Grid Paradigm Applicability to the U.S. Department of Defense

Layer Network TCP Disk Read/Write Network UDP GridFTP Figur e 7 - Extensible I/O Usage Paper : Command and Control Grid Systems Copyright R2AD, LLC 2005 - 13 - 3.10 Qualit y of Service (QoS) One benefit of grid technol ogies is robustness. Wh en a resource (i.e. service) goes down, the grid monitor can determine whether or not to st art another instance somewhere el se or not bother, depending on what the QoS agreement is. This is currentl y the model used by most cl ustering systems. The difference between gr ids and cl usters is the heterogeneity and geographic dispersion factors. The grid engine contains a component cal l ed Execute Monitoring Services (EMS). EMS is responsibl e for ensuring that the qual ities of serv ice agreements are met. It does this by querying the management mechanisms buil t into al l g rid resources and ensures that they are performing within the requiredl evel s. The WS-Agreement or WS-Pol icy standards are mostl i kel y to be used to convey the pol icy; however there are other possibil ities as wel l . Whil e most grid engines currentl y provide a monitor ing service, they are not based on a standard. The OGSA working group in GGF is working to define this core specification that woul d provide Execution Management Services (EMS). EMS is responsibl e for ensuring Qual ity of Service (QoS) on the system. It has the abil ity to start, stop, and even migrate resources on demand when needed. Systems from HP, IBM, Sun, and others al ready advertise this capabil ity for grid systems. The ch al l enge however is enabl ing resources in a standardized manner