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1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems最新文献

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Real-time extensions to the Java/sup TM/ platform: a progress report Java/sup TM/平台的实时扩展:进度报告
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806560
William Foote
{"title":"Real-time extensions to the Java/sup TM/ platform: a progress report","authors":"William Foote","doi":"10.1109/WORDS.1999.806560","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806560","url":null,"abstract":"Java/sup TM/ technologies have had a major impact on the software industry. The Java/sup TM/ Platform has brought a simple, powerful object oriented language and set of libraries to a large developer community. It has delivered on its promise to bring increased productivity, \"write once run anywhere\", security, and dynamically downloadable code to desktop and workstation environments. Java technologies are now being extended into embedded devices. These devices often require software that exhibits real time characteristics. Java language semantics are not specified tightly enough for such software, and certain API extensions are required. The paper explores the technical issues involved in defining real time extensions to the Java platform that meet this need.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132583555","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: 7
Proposal of an integrated object-oriented environment for the design of supervisory software for real-time industrial automation systems 提出了一种面向对象的集成环境，用于实时工业自动化系统的监控软件设计
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806598
L. Becker, W. P. Junior, C. Pereira
{"title":"Proposal of an integrated object-oriented environment for the design of supervisory software for real-time industrial automation systems","authors":"L. Becker, W. P. Junior, C. Pereira","doi":"10.1109/WORDS.1999.806598","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806598","url":null,"abstract":"The object-oriented paradigm has been used extensively both in CASE tools for modeling and design of distributed real-time systems as well as in software tools for developing supervisory control systems. Supervisory tools are very useful in the context of real-time industrial automation systems. Recent researches prove that the use of object-orientation paradigm in the development of these systems tend to produce better-structured and more reusable programs. This paper analyses, using case studies, some of the widely used commercial tools for modeling and supervisory control generation. After that, some case studies using the analyzed tools are reported and finally a proposal of an integrated object-oriented environment for application development and monitoring is made. This work is part of an ongoing research project that has been developed at the Industrial Automation Lab. of Federal University of Rio Grande do Sul in Brazil.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134635626","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: 7
Research directions in object oriented, real-time dependable systems 面向对象、实时可靠系统的研究方向
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806591
C. D. Locke
{"title":"Research directions in object oriented, real-time dependable systems","authors":"C. D. Locke","doi":"10.1109/WORDS.1999.806591","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806591","url":null,"abstract":"As we consider object oriented, real-time (OORT) dependable systems, especially those used in distributed implementations, several opportunities for significant further research become evident. Particularly in the context of middleware infrastructure, such as CORBA, further innovation is needed to improve the predictability and ease of implementation of such applications as command & control, telecom, and industrial automation. This brief panel position paper considers the need for further near-term research in architectural paradigms, dyanamic scheduling, and long-lived systems.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132723273","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
Naming service in the distributed object environment for adlets (ADDNS) adlets分布式对象环境中的命名服务(ADDNS)
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806564
Hossam I. Gharib, Ping-Wen Chen, Shi-Kuo Chang
{"title":"Naming service in the distributed object environment for adlets (ADDNS)","authors":"Hossam I. Gharib, Ping-Wen Chen, Shi-Kuo Chang","doi":"10.1109/WORDS.1999.806564","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806564","url":null,"abstract":"Naming is an important aspect of distributed system design. A naming system allows users and programs to assign symbolic names to objects, and subsequently use the names to refer to those objects. With the interconnection and sharing of computer resources in the distributed environment, the application/system domain over which naming systems must function is growing to encompass a wider area. This paper describes the motivations and the main features of ADDNS-A framework for the construction of the ADlets Distributed Naming Service (ADDNS). Adlet system is a new approach for the multimedia information retrieval and fusion based on the concept of active documents advertising, whereby an Adlet (the metadata of a document) travels in the network to seek out documents of interest to the parent document, and at the same time advertises its parent document to other interested Adlets. ADDNS provides the clients with a notion of an Adlet that hides the details of how and where an object is actually located in the network. ADDNS supports location independency, transparent migration, and replication transparency of Adlets in the system. The paper also describes the inter-object communication and the invocation mechanism used in the ADDNS. The ADDNS system is featured with a dynamic data structure that expends or shrinks according to the scale of the system component. Comparative algorithms for ADDNS approach with other naming approaches are also provided.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132856561","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: 2
On-line prediction of execution times - a basis for adaptive scheduling 在线预测执行时间——自适应调度的基础
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806581
M. Gergeleit, E. Nett, J. Fitzner
{"title":"On-line prediction of execution times - a basis for adaptive scheduling","authors":"M. Gergeleit, E. Nett, J. Fitzner","doi":"10.1109/WORDS.1999.806581","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806581","url":null,"abstract":"Adaptive scheduling meets the need to react in a predictable manner to dynamic, unpredictable changes in the computing system environment. Our TAFT (Time-Aware, Fault-Tolerant) scheduling approach especially addresses the realization of this important property for future real-time applications. The main idea is to trade timeliness of tasks to be executed for maximum functionality. TAFT scheduling uses the concept of the expected case execution time (ECET) of a task in order to achieve adaptivity. We describe the design and the implementation of an integrated on-line monitoring and execution time prediction infrastructure that is able to compute the ECETs efficiently during run-time. We explain how object-orientation can be utilized to achieve more fine-grained, and thus often more precise execution time predictions and we exhibit performance figures, that prove the viability of the approach.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927796","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: 2
On the availability of k-coteries in networks with unreliable nodes and links 节点和链路不可靠的网络中k- co群集的可用性
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806573
Eun-Hye Choi, Tatsuhiro Tsuchiya, T. Kikuno
{"title":"On the availability of k-coteries in networks with unreliable nodes and links","authors":"Eun-Hye Choi, Tatsuhiro Tsuchiya, T. Kikuno","doi":"10.1109/WORDS.1999.806573","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806573","url":null,"abstract":"The use of a k-coterie (a special set of subsets of nodes) is known as a robust approach to solving the distributed k-mutual exclusion problem in distributed systems. In order to evaluate the fault-tolerance capability of k-coterie-based methods, the notion of (k, /spl tau/) availability has been proposed as a generic measure. However, the applicability of the only existing evaluation method is limited to systems such that the nodes are fully connected by completely reliable links. To overcome the limitation, we propose a new method that can evaluate the (k, /spl tau/)-availability of k-coteries in general topology networks with unreliable nodes and links. The proposed method uses a new notion called minimal quorum spanning forests to perform evaluation effectively. Using the method, we find that the k-majority coterie, which is optimal when the network is completely reliable, is not necessarily optimal if the links can fail and/or the system has a topology other than a complete graph.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129786470","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
Using transition systems to formalize a pattern for time dependable applications 使用转换系统形式化时间可靠应用程序的模式
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806588
E. Haeusler, M. Fontoura
{"title":"Using transition systems to formalize a pattern for time dependable applications","authors":"E. Haeusler, M. Fontoura","doi":"10.1109/WORDS.1999.806588","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806588","url":null,"abstract":"This paper presents an example of the use of transition systems to formalize a pattern for soft real-time systems. The importance of this relies on the fact that this formalization can be used as a guide to a mapping from projects to transition systems based model-checkers. Since model-checking is a technique based on finite transition systems, this approach, currently, can only be applied to applications that do not modify dynamically the amount of interacting objects. Hence, the applicability of the pattern is limited to statically configurable systems. The pattern, namely MULTI-AUTOMATA, is presented through a variation of the GoF form. A high-level specification language used to instantiate the pattern is also presented. The high-level language respects the pattern semantics and is used to help the pattern utilization.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124595451","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 real-time, fault tolerant CORBA implementation: a case study 实时的、容错的CORBA实现:一个案例研究
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806556
C. D. Locke, Thomas A. North
{"title":"A real-time, fault tolerant CORBA implementation: a case study","authors":"C. D. Locke, Thomas A. North","doi":"10.1109/WORDS.1999.806556","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806556","url":null,"abstract":"The Object Management Group's (OMG's) Common Object Request Broker Architecture (CORBA) standard has attracted a great deal of attention in the distributed object oriented systems community because of its capability to greatly simplify the creation of vendor-independent, heterogeneous application systems. However, the current CORBA standard, version 2.3, provides neither interfaces to manage resources for real time response, nor interfaces to manage the redundant object entities required for a highly reliable, fault tolerant application. The paper describes the design and implementation of an Object Request Broker (ORB), compliant with the OMG standard, that includes extensions to support both real time response and entity redundancy capabilities in the context of the CORBA standard. This implementation demonstrates an important extension of the ORB paradigm into many real time, fault tolerant application domains.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127046294","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
An efficient methodology for constructing and managing a 3-D world 构建和管理三维世界的有效方法
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806571
Taehyung Wang, P. Sheu
{"title":"An efficient methodology for constructing and managing a 3-D world","authors":"Taehyung Wang, P. Sheu","doi":"10.1109/WORDS.1999.806571","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806571","url":null,"abstract":"As the demand for virtual reality systems increases, a new approach is needed to satisfy the following requirements: a world consists of a large number of objects; a camera is allowed to move and a world should be displayed in near real-time depending on the position of the camera as well as the angle of its lens; and minimum effort should be needed when objects are moving. We satisfy these requirements with the following: an object-oriented rendering approach is developed; and an approach based on region trees and spatial indexing (specifically R/sup +/-tree) is developed to manage operations to objects (i.e., retrieval, insertion, and deletion) effectively.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114873654","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
Persistent enterprise components: improving the availability of legacy systems 持久的企业组件:改进遗留系统的可用性
1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems Pub Date : 1999-01-27 DOI: 10.1109/WORDS.1999.806566
Eric Hughes
{"title":"Persistent enterprise components: improving the availability of legacy systems","authors":"Eric Hughes","doi":"10.1109/WORDS.1999.806566","DOIUrl":"https://doi.org/10.1109/WORDS.1999.806566","url":null,"abstract":"Systems engineers are using object-oriented enterprise components to integrate and provide access to legacy information systems and databases. These components may extend the useful lifetime of a legacy system by making a subset of its data and functionality available to new applications, including intranets and extranets. However, the availability of the legacy systems often does not meet the requirements of these new applications. This paper presents a strategy for migration to enterprise components that improves the effective availability of legacy functionality and data by storing component data in native, object form. It proposes the use of persistence services embedded in the component execution environment to store persistent enterprise data. It compares the approach to alternatives and relates the initial experience in applying this strategy to command and control systems.","PeriodicalId":302179,"journal":{"name":"1999 Proceedings. Fourth International Workshop on Object-Oriented Real-Time Dependable Systems","volume":"391 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122077959","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
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