Browsing by Subject "Computer programming languages"

Now showing 1 - 7 of 7

Open Access
Architecture framework for mapping parallel algorithms to parallel computing platforms
(CEUR-WS, 2013) Tekinerdogan, Bedir; Arkin, E.
Mapping parallel algorithms to parallel computing platforms requires several activities such as the analysis of the parallel algorithm, the definition of the logical configuration of the platform, and the mapping of the algorithm to the logical configuration platform. Unfortunately, in current parallel computing approaches there does not seem to be precise modeling approaches for supporting the mapping process. The lack of a clear and precise modeling approach for parallel computing impedes the communication and analysis of the decisions for supporting the mapping of parallel algorithms to parallel computing platforms. In this paper we present an architecture framework for modeling the various views that are related to the mapping process. An architectural framework organizes and structures the proposed architectural viewpoints. We propose five coherent set of viewpoints for supporting the mapping of parallel algorithms to parallel computing platforms. We illustrate the architecture framework for the mapping of array increment algorithm to the parallel computing platform. Copyright © 2013 for the individual papers by the papers' authors.
Open Access
Domain specific language for deployment of parallel applications on parallel computing platforms
(Association for Computing Machinery, 2014-08) Arkın, E.; Tekinerdoğan, Bedir
To increase the computing performance the current trend is towards applying parallel computing in which parallel tasks are executed on multiple nodes. The deployment of tasks on the computing platform usually impacts the overall performance and as such needs to be modelled carefully. In the architecture design community the deployment viewpoint is an important viewpoint to support this mapping process. In general the derived deployment views are visual notations that are not amenable for run-time processing, and do not scale well for deployment of large scale parallel applications. In this paper we propose a domain specific language (DSL) for modeling the deployment of parallel applications and for providing automated support for the deployment process. The DSL is based on a metamodel that is derived after a domain analysis on parallel computing. We illustrate the application of the DSL for a traffic simulation system and provide a set of important scenarios for using the DSL. © 2014 ACM.
Open Access
Evaluation framework for software architecture viewpoint languages
(ACM, 2013) Tekinerdogan, Bedir; Demirli, Elif
In general, software architecture is documented using software architecture views to address the different stakeholder concerns. The current trend recognizes that the set of viewpoints should not be fixed but multiple viewpoints might be introduced instead to design and document the software architecture. To ensure the quality of the software architecture various software architecture evaluation approaches have been introduced. In addition several documentation guidelines have been provided to ensure the quality of the software architecture document. Unfortunately, the evaluation of the adopted viewpoints that are used to design and document the software architecture has not been considered explicitly. If the architectural viewpoints are not well-defined then implicitly this will have an impact on the quality of the design and the documentation of the software architecture. We present an evaluation framework for assessing existing or newly defined software architecture viewpoint languages. The approach is based on software language engineering techniques, and considers each viewpoint as a metamodel. The approach does not assume a particular architecture framework and can be applied to existing or newly defined viewpoint languages. We illustrate our approach for modeling and reviewing the first and second editions of the viewpoint languages of the Views and Beyond approach. Copyright © ACM.
Open Access
An extended user interface for CAL systems
(1990) Davenport, David
This paper examines the problems of complexity in human-computer interaction from the perspective of CAL systems. By considering the very special demands of young, pre-reading age children, it shows how pointing type interfaces can be extended in a simple and natural manner based on the notion that the position of, and spatial relationship between objects, is of significance. Various examples based on this extended interface concept are introduced to demonstrate its functionality.
Open Access
Model-driven transformations for mapping parallel algorithms on parallel computing platforms
(MDHPCL, 2013) Arkin, E.; Tekinerdoğan, Bedir
One of the important problems in parallel computing is the mapping of the parallel algorithm to the parallel computing platform. Hereby, for each parallel node the corresponding code for the parallel nodes must be implemented. For platforms with a limited number of processing nodes this can be done manually. However, in case the parallel computing platform consists of hundreds of thousands of processing nodes then the manual coding of the parallel algorithms becomes intractable and error-prone. Moreover, a change of the parallel computing platform requires considerable effort and time of coding. In this paper we present a model-driven approach for generating the code of selected parallel algorithms to be mapped on parallel computing platforms. We describe the required platform independent metamodel, and the model-to-model and the model-to-text transformation patterns. We illustrate our approach for the parallel matrix multiplication algorithm. Copyright © 2013 for the individual papers by the papers' authors.
Open Access
Model-free adaptive hysteresis for dynamic bandwidth reservation
(IEEE, 2007-10) Akar, Nail
Dynamic bandwidth reservation refers to the process of dynamically updating the bandwidth allocation to a connection between two network end points on the basis of actual aggregate traffic demand of the connection. We assume a scenario in which bandwidth updates for the connection should not be performed too frequently and the frequency of updates are thus limited to a so-called desired update rate. We propose an asynchronous model-free adaptive hysteresis algorithm for dynamic bandwidth reservations with such update frequency constraints. We validate the effectiveness of the proposed approach by comparing its bandwidth efficiency with that of a synchronous model-based dynamic bandwidth reservation mechanism from the existing literature.
Open Access
On Roth, Korth, and Silberschatz's extended algebra and calculus for nested relational databases
(1992) Tansel, A. U.; Garnett, Lucy
We discuss the issues encountered in the extended algebra and calculus languages for nested relations defined by Roth, Korth, and Silberschatz. Their equivalence proof between algebra and calculus fails because of the keying problems and the use of extended set operations. Extended set operations also have unintended side effects. Furthermore, their calculus seems to allow the generation of power sets, thus making it more powerful than their algebra.