In this paper we explore the integration among geographical information systems (GIS) and agent based simulation tools. An agent-based geographical information system (ABGIS) could be characterized as a kind of system...
In this paper we explore the integration among geographical information systems (GIS) and agent based simulation tools. An agent-based geographical information system (ABGIS) could be characterized as a kind of system integrating features commonly found in geographical information system with the features of agent-based simulation tools. ABGIS would give to scientists and researches, not necessarily computer experts, access to powerful simulation tools and an environment that is an excellent metaphor to represent our spatio-temporal world. With ABGIS we could explore the dynamics of spatiotemporal systems, and particularly but not exclusively, complex systems.
A generic simulation tool aimed to explore the dynamics of spatio-temporal systems doesn't exists yet. First steps in the direction of generic agent-based simulation tools were given with the Swarm project [1],[2]...
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Agent-Based Geographical Information System (ABGIS) could be characterized as a kind of system integrating features commonly found in Geographical Information System and in Agent-Based Simulation Tools. ABGIS provides...
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Interoperability is a key point for integrating heterogeneous computing systems. A usual approach proposes the integration of the conceptual databases schemes into a global conceptual scheme, to resolve syntactic and ...
ISBN:
(纸本)9781920682408
Interoperability is a key point for integrating heterogeneous computing systems. A usual approach proposes the integration of the conceptual databases schemes into a global conceptual scheme, to resolve syntactic and structural heterogeneity. Moreover, semantic problems can remain. Ontologies have been largely designated to overcome semantic heterogeneity. We propose the specification of a formal ontology about the specific knowledge domain to be shared among several database systems build a posteriori of the ontology specification. We reach this integration through a global scheme, developed as a software layer among the databases under consideration. To test this approach we elaborated a case study, based upon hypothetical queries submitted to heterogeneous databases, with data on soil domain, to identify the soil most appropriate to a certain culture. The results are promising, but crucial, in our approach, is the acceptance for a given community of a common vocabulary and its relationships and that are captured by the ontology and transformed to the target conceptual models.
In this work, we present and analyze the use of a reconfigurable job scheduling simulator called RJSSim as an aid tool for parallel processing learning. This software is a functional and performance Java-based simulat...
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This paper presents an information systems architecture (ISA) model that comprises the integration of information systems, technology, business processes and users in public sector environment. The ISA model presented...
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ISBN:
(纸本)9729805024
This paper presents an information systems architecture (ISA) model that comprises the integration of information systems, technology, business processes and users in public sector environment. The ISA model presented considers specific aspects of the public sector as well characteristics of information systems development and use in this sector found in the literature and in the studies realised in informatic services brazilian State public enterprises. The model proposed was structured with five components: (a) Government structure (mission and organisational culture, Planning and government platform);(b) Public services (considered the " business" of public structure, with the information for citizens, for top level and government administrative technical);(c) Information systems (by including the legacy systems and executives systems information);(d) Information technology (centred in investment policies and the government computational platforms-as micro-computer and mainframe relationship) and (e) Users (centred in the necessities for public-training, adaptation and use of the SI). The model proposed was submitted to validation from informatic services Brazilian State public enterprises. The results point out the relevance of the integrated vision of their components and they permit to establish strategies for implantation of ISA model, in order to observing public sector specificity.
A proposed cost effective alternative to current U.S. Navy structurally configured hulls is presented in this paper. This proposed design for producibility concept involves the elimination of structural stanchions and...
A proposed cost effective alternative to current U.S. Navy structurally configured hulls is presented in this paper. This proposed design for producibility concept involves the elimination of structural stanchions and transverse web frames. The potential impact of this “no frame” concept on structural design, weight and construction and material costs for naval surface frigates and destroyers is reflected in 1) reduced costs for the installation of distributive systems and 2) a reduced number and complexity of structural details providing a more reliable and less costly structure. This study was performed in three parts: 1) Determine the most feasible length between bulkheads without frames; 2) Using this length perform detail weight studies and construction and material costs analysis comparison on a 72-foot long hull module, with and without frames, for a FFG-7, and 3) Estimate the saving in man hours of labor on the installation of distributive systems and shipfitting for an FFG-7. For the feasible length studies on the “no frame” structural configuration, thirty-seven strength, weight and vertical center of gravity studies were performed on two ship classes; twenty-two on the FFG-7 class and fifteen on the DD-963 class. The detailed weight studies and construction and material cost analyses were conducted for FFG-7 “no frame” and “as built” modules. Results indicating the “no frame” concept module was 6.8% heavier and 14.8% less costly than the “as built” module. For the impact of an FFG-7 “no frame” structurally configured hull on the cost of labor required for the installation of distributive systems and for other functional work such as ship fitting, welding, and electrical, this study indicated a reduction of 169,206 labor hours per ship, representing 7.12% of the total required man hours to fabricate an FFG-7 class ship. With the employment of the “no frame” concept, certain areas of significant concern and potential risk were addressed. These include: 1) t
The structural design of a ship's section is a complicated, repetitive and time consuming task. With the advent of new technology, high speed computers have enabled the ship designer to accomplish in a matter of s...
The structural design of a ship's section is a complicated, repetitive and time consuming task. With the advent of new technology, high speed computers have enabled the ship designer to accomplish in a matter of seconds what would formerly take days to accomplish by hand. The Structural Synthesis Design program (SSDP) is a N avy developed computer-aided design tool which is used to design (or to analyze) the longitudinal scantlings for a variety of ship cross sections, consisting of any practical combinations of decks, platforms, bulkheads and materials, i.e., various steel and aluminum alloys. The final hull section design will have the lowest practical weight for the chosen geometric configuration, structural arrangements, and imposed loadings. The scantling developed by the program will satisfy all U.S. N avy ship structural design criteria. An explanation of the objective and design elements of N avy ship structures is included. The rationale behind the SSDP design philosophy is developed along with the significant program capabilities. In an attempt to highlight the influence of automated design procedures on the current naval ship design process, the effect of the SSDP on the DDG 51 destroyer structural development is addressed.
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