This paper proposes an efficiency improvement method for the multidisciplinary design optimization of link mechanisms. While behavior of a link mechanism is dominated by kinematic relationships, it is restricted under...
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Dynamic relocation of databases through networks, or database migration, will soon become a powerful standard database operation effectively using recent advances in broadband networks. In our previous work, a transac...
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Dynamic relocation of databases through networks, or database migration, will soon become a powerful standard database operation effectively using recent advances in broadband networks. In our previous work, a transaction processing method has been proposed in distributed database environments, based on database migration operations. Generally, database replication is an effective technique to improve transaction processing throughput in conventional systems. We propose a replica management method for use with database migration. Database migration is used at the beginning of a transaction to dynamically relocate database replicas. The performance of the proposed method is evaluated using simulation results.
With the Internet transforming into multimedia and high-speed, the various traffic requiring different qualities of service (QoS) will co-exist in the network. Also, classified service based on Diff-Serv (differentiat...
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With the Internet transforming into multimedia and high-speed, the various traffic requiring different qualities of service (QoS) will co-exist in the network. Also, classified service based on Diff-Serv (differentiated service), MPLS (Multi Protocol Label Switching) and so on, have come into wide use. In today's environment of the Internet, it is necessary for the routers to perform the control mechanism to guarantee various QoS. We propose the buffer management scheme of the Internet router with class-based priority control, focusing on per-flow queueing, and evaluate the performance. We aim at the realization of differentiated services and the dissolution of the buffer occupation by specific flow.
In recent years, owing to the rapid development of wireless communications and computer hardware technologies, users can now utilize various services on networks without fixing their locations by utilizing portable te...
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In recent years, owing to the rapid development of wireless communications and computer hardware technologies, users can now utilize various services on networks without fixing their locations by utilizing portable terminals provided with wireless communication functions. In such environments, the demand for utilizing appropriate information according to the location of the users is increasing and processing methods for service realization are being studied. However, in situations involving continuous utilization of database information, these studies cannot be said to be sufficient. The authors have therefore proposed a mechanism called MobiView as a data management model for utilizing databases efficiently in the mobile environments. By utilizing location-dependent views among the several proposed MobiViews, the user can easily utilize information according to his own location. In this paper, based on the distinctive features of this location-dependent view, we will consider several possible view maintenance techniques and carry out their quantitative comparison from the viewpoint of traffic. We will then show how the optimum technique will change according to parameters such as frequency of movement.
The manufacturing industry is facing many new challenges including redefined customer expectations in the E-Commerce era. The consumer is now better informed, more demanding and has higher expectations in terms of pro...
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In information filtering (IF) systems, user long-term needs we expressed as user profiles. The quality of a user profile has a major impact on the performance of IF systems. The focus of the proposed research is on th...
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ISBN:
(纸本)9781581132267
In information filtering (IF) systems, user long-term needs we expressed as user profiles. The quality of a user profile has a major impact on the performance of IF systems. The focus of the proposed research is on the study of user profile generation and update. The paper introduces methods for user profile generation, and proposes a research agenda for their comparison and evaluation.
The major goals of this study were to: (1) assess whether low-frequency stimulation (LFS) is effective at inducing long-term depression (LTD) of the perforant path/dentate gyrus synapse in the anesthetized adult rat h...
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The major goals of this study were to: (1) assess whether low-frequency stimulation (LFS) is effective at inducing long-term depression (LTD) of the perforant path/dentate gyrus synapse in the anesthetized adult rat hippocampus, and (2) determine the frequency at which the shift from LTD to LTP occurs. Measures of homosynaptic LTD were recorded in the dentate gyrus during experiments conducted on anesthetized adult rats, Our results indicate that stimulation frequencies lower than or equal to 7 Hz resulted in the induction of LTD of both PSA and EPSP slope measures, with a shift to LTP occurring approximately between 11 and 30 Hz stimulation.
In spite of increasing infrastructure preservation and improvement needs, limited agency budgets, and public resistance to new construction, civil engineering education focuses almost exclusively on teaching students ...
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In spite of increasing infrastructure preservation and improvement needs, limited agency budgets, and public resistance to new construction, civil engineering education focuses almost exclusively on teaching students to design new facilities. Analytical ability and knowledge of design standards and approaches are necessary but not sufficient tools for managing civil infrastructure in the 21st century. Students must learn to integrate this traditional civil engineering knowledge base with an understanding of deterioration science, economics, finance, decision and management theory, maintenance management, and public policy. This paper describes efforts to address this gap in civil engineering education. The authors began with a single course at Carnegie Mellon University and have modified the original material in different ways to serve the needs at other institutions.
Under deregulation, the formation of electricity markets is a topic of great interest in the power industry and in financial institutions worldwide. Using derivative financial instruments (including options) becomes i...
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Under deregulation, the formation of electricity markets is a topic of great interest in the power industry and in financial institutions worldwide. Using derivative financial instruments (including options) becomes important for hedging against uncertainty and managing risk-limiting exposure to adverse market conditions. Black and Scholes' equation is often used to value options, but its validity is questionable due to assumptions that may not hold for electricity, most notably the assumption of log-normally distributed prices for the underlying commodity. In this research, a put options market for electricity is modeled. Adaptive agents trade in this market to maximize profit. They are not forced to use an explicit economic or financial model (e.g., Black-Scholes) in their valuation. A genetic algorithm (GA) is used to find alternate valuations that are used to generate buy and sell signals. The results show that it is possible to evolve profitable valuations for use with buying and selling options in this simple model. Reasons for and implications of this finding (e.g., that Black-Scholes may not be a good method for pricing electricity derivatives) are discussed.
In this paper,we describe a system for extracting the facial features required to reconstruct a 3D model of a face from a 2D *** facial image processing library comprises of 32 standard functions and 7 functions for t...
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In this paper,we describe a system for extracting the facial features required to reconstruct a 3D model of a face from a 2D *** facial image processing library comprises of 32 standard functions and 7 functions for the automatic facial contour extraction function.32 standard functions can be classified into five groups such as face detection,pupil detection, facial parts detection,facial parts contour extraction and face contour *** system is not only useful for the automatic 3D facial model fitting but also for a widespread facial image processing applications such as personal authentication and facial expression analysis.
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