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Boost-phase intercept of a threat intercontinental ballistic missile (ICBM) is the first layer of a multi-layered missile defense strategy. Space-based interceptors possess certain kinematic advantages over ground-based interceptors in defeating an ICBM threat during boost phase. This paper compares the performance of various guidance laws that might be used by an exo-atmospheric kill vehicle (EKV)...
This paper describes a SoSE environment designed to facilitate the problem-solving process of complex situations. Complex situations can be seen as the behavior of a system of systems that needs to be transformed to a desirable state. This is addressed by exploring the impact and implications of systems analysis and design within a social/group setting where many stakeholders with issues, concerns...
This paper addresses the need for rapid and robust integration of external statechart assertions with the software components of a system of systems (SoSes) for the purpose of runtime verification of the complex SoS behaviors. We describe a framework for connecting assertions to statechart models or to plain Java code using AspectJ. The framework manages connections using a single reusable AspectJ...
Classification using association rules has added a new dimension to the ongoing research for accurate classifiers. Experiments have shown that these classifiers are significantly more accurate than decision tree classifiers. The idea behind most of the existing approaches has been the mining of positive class association rules from the training set and then selecting a subset of the mined rules for...
This paper provides preliminary results of an approach that is being used to support the efforts to standardize concepts and terminology for architecture and systems by the International Organization for Standardization (ISO) convened under working group JTC1/SC7/WG42. The approach is based on logic and the methodology of science. The results provide: (i) a demonstration of the proposed modeling approach...
Deregulated, the U.S. electrical power grid system has shown the emergence of behaviors that include scrambling by buyers to purchase electricity and unexpected increasing costs of electricity to consumers. To infer those behaviors, in this paper, we adapt a theoretical framework, developed by Newman in his work on spread of epidemic disease on networks, to the propagation of electricity buying and...
Recent advancement in computer hardware and software have led to an increasing amount of 3D models. Furthermore, the rapid development of WWW enables the access to 3D models constructed by people all over the world. This paper surveyed the background, state-of-the-art review and progress of content-based 3D shape retrieval, and analyzed and described several topics, including the preprocessing, coordinates...
The proposed paper describes the ease of security while on the go, by using the PDA from any where. The system will recognize the user and then connect the user with its server to handle the security devices installed on the station. In our proposed system we have two setups, one as client (PDA) and other as server (home base).The client will gain access through a WAP with the server using username...
This paper begins with the introduction of the best known over-the-horizon radar (OTHR) systems around the world. A model of the maximum detection range for a high frequency (HF) frequency modulated continuous wave (FMCW) over-the-horizon backscatter (OTH-B) radar is reported. The maximum interception range for a narrowband intercept receiver is also quantified as a function of the minimum required...
A carry-select adder (CSA) can be implemented by using single ripple carry adder and an add-one circuit instead of using dual ripple-carry adders to reduce the area and power but with speed penalty. This paper proposes a new add-one circuits using the fast all-one finding circuit and low-delay multiplexers to reduce the area and accelerate the speed of CSA, and no restrictions are imposed on the design...
Today, the U.S. consumes almost 21 million barrels of crude oil per day; approximately 60% of the U.S. demand is supplied by imports. The transportation sector alone accounts for two-thirds of U.S. petroleum use. Biofuels, liquid fuels produced from domestically-grown biomass, have the potential to displace about 30% of current U.S. gasoline consumption. Transitioning to a biofuels industry on this...
The path planning problem for military applications is discussed, with a review of relevant literature. An evolutionary algorithm originally designed for optimizing 3-dimensional highway alignments is adapted and tested for real-time military path planning applications in a changing environment. An optimization problem is formulated to seek a path for an autonomous agent or robot between given origin...
We introduce a process-neutral framework for software reuse in safety-critical system-of-systems, and present a new model, called C5RA, to capture the relevant component information and to assist in reusable component specification matching that takes software safety into account. The framework consists of four elements: organizational factors, component attributes, component specification, and safety...
Optimizing energy consumption for extending the lifetime in wireless sensor networks is of dominant importance. Groups of autonomous robots and unmanned aerial vehicles (UAVs) acting as mobile data collectors are utilized to minimize the energy expenditure of the sensor nodes by approaching the sensors and collecting their buffers via single hop communication, rather than using multihop routing to...
System of systems engineering (SoSE) and family of systems engineering (FoSE) continue to be two of the least well-understood SE disciplines. Knowledge of the SE standards significantly aids this understanding, including the relationship between SE, SoSE, and FoSE. This knowledge enhances any engineerpsilas career. The goals of this paper are to: 1) describe the SE standards heritage, processes, and...
While much research has been devoted to learning and machine intelligence, the field is still in its infancy. In particular, a technology that will allow for heuristic exploitation of information domain regularities to reduce the time required for knowledge acquisition while concomitantly resulting in an increase in the reliability of the acquired knowledge is still lacking. Unfortunately, contemporary...
One stage in designing the control for underwater robot swarms is to confirm the control algorithms via simulation. To perform the simulation Microsoftpsilas Robotic Studiocopy was chosen. The problem with this simulator and others like it is that it is set up for land-based robots only. This paper explores one possible way to get around this limitation. This solution cannot only work for underwater...
Storage virtualization provides abstraction to pervasive storage graphs. Data management operations require pervasive search utilities to discovery entities and services. In search methods, algorithmic complexity, such as memory bound problems, error convergence issues and supervised training is prohibitive for large state and solution spaces or high dimensional state spaces. In addition, among popular...
It has been asserted that paradoxical thinking epitomizes systems thinking. This paper examines this assertion using systems thinking approaches, in particular soft systems methods and Systemigrams. Additional systems concepts such as boundary are also utilized. The analysis results provide insight into paradoxical thinking as a problem structuring method for dealing with complex engineering problems...
Complex manufacturing processes such as substrate manufacturing could be alive because they change continuously and cyclically in order to improve their health. The health management technology has been proposed as general solution framework for complex systems like manufacturing process. In this article, the System of Systems aspects of the technology and its application are discussed. Firstly, the...
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