Proceedings 20th International Conference of the Chilean Computer Science Society最新文献_第2页

Comprehensive specification of distributed systems using I/sup 5/ and IOA 使用I/sup 5/和IOA的分布式系统的综合规范

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890394

M. Bastarrica, S. Demurjian, Alexander A. Shvartsman

{"title":"Comprehensive specification of distributed systems using I/sup 5/ and IOA","authors":"M. Bastarrica, S. Demurjian, Alexander A. Shvartsman","doi":"10.1109/SCCC.2000.890394","DOIUrl":"https://doi.org/10.1109/SCCC.2000.890394","url":null,"abstract":"Low level difficulties in the development of distributed systems that are due to non-standard communication protocols and incompatible components or platforms have largely been solved through standardization and commoditization of protocols and platforms. Distributed systems are being designed at higher levels of sophistication these days, and having an expressive yet usable specification language is a valuable tool. IOA is a formal language for specifying the semantics of distributed systems. I/sup 5/ is a specification framework for architectural definition of distributed systems, also intended as a basis for configuration management. I/sup 5/ has five levels that specify mainly the structural characteristics at different levels of abstraction, but I/sup 5/ does not address the semantics or dynamics of distributed systems interactions. We explore the integration of IOA and I/sup 5/ to create combined specifications that enjoy the benefits of both specification languages: the five different levels of abstraction of I/sup 5/ with their structural specification capabilities are enhanced by a semantic specification written in IOA. We show an example of a specification developed using IOA and I/sup 5/ in an integrated way. We consider general approaches to such integrated specifications and discuss the possibilities and limitations of integrating IOA and I/sup 5/, as well as our future work towards the complete integration.","PeriodicalId":263257,"journal":{"name":"Proceedings 20th International Conference of the Chilean Computer Science Society","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A genetic classifier tool 一种遗传分类工具

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890387

A. Pozo, Mozart Hasse

引用次数: 10

Multiplicity and local search in evolutionary algorithms to build the Pareto front 进化算法中的多重性和局部搜索构建Pareto前沿

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890386

Héctor A. Leiva, S. Esquivel, R. Gallard

引用次数: 12

A dynamic virtual fragmentation method for query recovery optimization 一种用于查询恢复优化的动态虚拟碎片方法

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890391

Jaime A. Aguilera Vázquez

{"title":"A dynamic virtual fragmentation method for query recovery optimization","authors":"Jaime A. Aguilera Vázquez","doi":"10.1109/SCCC.2000.890391","DOIUrl":"https://doi.org/10.1109/SCCC.2000.890391","url":null,"abstract":"The time consumed during the execution of queries in a parallel and distributed environment is highly affected by the form in which the tables comprising a database have been fragmented. The classical methods of fragmentation in a distributed database system helps, to a great extent, to make the information retrieval faster and with smaller calculation efforts. This is particularly true for applications where the specifications are well known in advance at the time of the creation of the tables that compose the database, which in some form or other influenced the design and the definition of the type of fragmentation and their distribution on different sites of processing. Nevertheless, the above characteristics cannot be used in applications where the distributed management cannot do inferences that help it to know in what sites the data with the characteristics the user is looking for are located. Under these conditions the time and amount of work used by the participants in the query solution can be highly increased. In this paper the dynamic virtual fragmentation method is presented. The method works as an alternative way that allows us to diminish response time consumed by queries using horizontal fragmented tables. The proposed method has been proven and implemented in a database parallel server running on a shared nothing supercomputer.","PeriodicalId":263257,"journal":{"name":"Proceedings 20th International Conference of the Chilean Computer Science Society","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127702763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A dynamic associative semantic model for natural language processing based on a spreading activation network 基于扩展激活网络的自然语言处理动态关联语义模型

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890397

Alejandro Bassi

引用次数: 1

Testing an implementation of a temporal logic language 测试时态逻辑语言的实现

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890393

Marisa A. Sanchez, J. Augusto

引用次数: 2

Evolving a legacy data warehouse system to an object-oriented architecture 将遗留数据仓库系统发展为面向对象的体系结构

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890389

A. H. Filho, H. Prado, Simão S. Toscani

{"title":"Evolving a legacy data warehouse system to an object-oriented architecture","authors":"A. H. Filho, H. Prado, Simão S. Toscani","doi":"10.1109/SCCC.2000.890389","DOIUrl":"https://doi.org/10.1109/SCCC.2000.890389","url":null,"abstract":"We introduce an object-oriented approach to transform a star-schema of a legacy data warehouse system into a Dimensional Object Model (DOM) (Firestone, 1998), in order to take advantage of the flexibility of the object paradigm. We have applied the Object-Oriented Software Engineering (OOSE) process, proposed by (Jacobson et al., 1992), to describe the life cycle of a data warehouse and to clarify the context of our intervention. By means of OOSE we also define the target architecture and the components that will ensure the development of reuse-supporting data warehouse systems. In a sense, a change tolerant architecture is proposed, as referred to by (Jacobson, 1998). The solution proposed applies the object paradigm for the star-schema decomposition in a three-layer architecture, separating the components in logical, interface and data management layers. This decomposition minimizes the dependence among the components and increases their reusability. The main contribution of this work is that, by transforming the star-schema into a DOM, we are preparing the system to evolve through any object-oriented data warehouse development methodology. In a context of many already existing data warehouse systems based on relational models, this transformation sounds especially interesting.","PeriodicalId":263257,"journal":{"name":"Proceedings 20th International Conference of the Chilean Computer Science Society","volume":"402 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133565788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Network programming internals of the Dillo Web browser Dillo Web浏览器的网络编程内部

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890406

Jorge Arellano-Cid, H. Brand

引用次数: 2

Comparative analysis of a parallel discrete-event simulator 并行离散事件模拟器的比较分析

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890405

Mauricio Marín

{"title":"Comparative analysis of a parallel discrete-event simulator","authors":"Mauricio Marín","doi":"10.1109/SCCC.2000.890405","DOIUrl":"https://doi.org/10.1109/SCCC.2000.890405","url":null,"abstract":"Discrete-event simulation is a widely used technique for the study of systems which are too complex to be modeled with analytical methods. Usually parallelism becomes an effective tool for reducing the running times involved in the simulation of large scale systems. However the actual realization of an efficient parallel simulator is highly dependent on the particular features of the system being modeled. As a result, a number of alternative strategies for parallel simulation, the so called synchronization protocols, have been developed. None of them is the most efficient one for all kind of systems, or even different instances of a given system. It is then relevant to provide the designer of a parallel simulator with information relative to the factors affecting the performance of known protocols. We present an analysis of such factors in the context of the comparison of an optimistic synchronization protocol with alternative approaches which are suitable for the bulk-synchronous parallel model of computing. It is well-known that analytical analysis in this field is mathematically intractable due to the irregular nature of the workload. However, rather than resorting to benchmarks whose results are largely influenced by programming details, we devised a strategy to get quantitative results from an implementation independent and yet empirical framework.","PeriodicalId":263257,"journal":{"name":"Proceedings 20th International Conference of the Chilean Computer Science Society","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129781098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Haar-like wavelets defined over tetrahedrical grids 四面体网格上定义的类哈尔小波

Proceedings 20th International Conference of the Chilean Computer Science Society Pub Date : 2000-11-16 DOI: 10.1109/SCCC.2000.890399

L. Boscardin, Liliana Castro, S. Castro

引用次数: 1