scholarly journals CX: A Scalable, Robust Network for Parallel Computing

2002 ◽  
Vol 10 (2) ◽  
pp. 159-171
Author(s):  
Peter Cappello ◽  
Dimitrios Mourloukos
Keyword(s):  
Object Oriented ◽  
The Self ◽  
Interprocessor Communication ◽  
Test Bed ◽  
Work Stealing ◽  
Simple Diffusion ◽  
Application Logic ◽  
Robust Network ◽  
Eager Scheduling ◽  
Scalable Network

CX, a network-based computational exchange, is presented. The system's design integrates variations of ideas from other researchers, such as work stealing, non-blocking tasks, eager scheduling, and space-based coordination. The object-oriented API is simple, compact, and cleanly separates application logic from the logic that supports interprocess communication and fault tolerance. Computations, of course, run to completion in the presence of computational hosts that join and leave the ongoing computation. Such hosts, or producers, use task caching and prefetching to overlap computation with interprocessor communication. To break a potential task server bottleneck, a network of task servers is presented. Even though task servers are envisioned as reliable, the self-organizing, scalable network ofn- servers, described as asibling-connected height-balanced fat tree, tolerates a sequence ofn-1 server failures. Tasks are distributed throughout the server network via a simple "diffusion" process. CX is intended as a test bed for research on automated silent auctions, reputation services, authentication services, and bonding services. CX also provides a test bed for algorithm research into network-based parallel computation.

Development of an Object-Oriented Program With Adaptive Mesh Refinement for Heat Transfer Simulations

2007 ◽  
Author(s):  
Jianhu Nie ◽  
David A. Hopkins ◽  
Yitung Chen ◽  
Hsuan-Tsung Hsieh
Keyword(s):  
Heat Transfer ◽  
Adaptive Mesh Refinement ◽  
Large Scale ◽  
Mesh Refinement ◽  
Object Oriented ◽  
Adaptive Mesh ◽  
Time Cost ◽  
Test Bed ◽  
Element Analysis ◽  
Cpu Time

A 2D/3D object-oriented program with h-type adaptive mesh refinement method is developed for finite element analysis of the multi-physics applications including heat transfer. A framework with some basic classes that enable the code to be built accordingly to the type of problem to be solved is proposed. The program consists of different modules and classes, which ease code development for large-scale complex systems, code extension and program maintenance. The developed program can be used as a “test-bed” program for testing new analysis techniques and algorithms with high extensibility and flexibility. The overall mesh refinement causes the CPU time cost to greatly increase as the mesh is refined. However, the CPU time cost does not increase very much with the increase of the level of h-adaptive mesh refinement. The CPU time cost can be saved by up to 90%, especially for the simulated system with a large number of elements and nodes.

Μίνθα

2014 ◽  
pp. 1119-1141
Author(s):  
Jörn Guy Süß ◽  
Neil Robinson ◽  
David Carrington ◽  
Paul Strooper
Keyword(s):  
Software Engineering ◽  
Software Development ◽  
Object Oriented ◽  
Safety Critical ◽  
Development Framework ◽  
Code Generators ◽  
Application Logic ◽  
The Cost ◽  
Framework Development ◽  
The Way

Implementation of railway controller application logic is a highly safety-critical and time-consuming task carried out individually for each client and station by specialised signalling engineers, with corresponding high costs. Μίνθα is a software development framework designed to create code generators for application logic for the client railway companies of Ansaldo STS that use the Microlok II controller to lower the cost and increase repeatability. This chapter describes the evolution of Μίνθα from prototype to framework, and introduces the software engineering approaches of object-oriented meta-modelling and framework development along the way. It also presents known limitations and further application areas of the framework.

scholarly journals Symmetry in Self-Similarity in Space and Time—Short Time Transients and Power-Law Spatial Asymptotes

Symmetry ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1489
Author(s):  
Ken Sekimoto ◽  
Takahiko Fujita
Keyword(s):  
Power Law ◽  
Late Stage ◽  
Scaling Function ◽  
Early Stage ◽  
The Self ◽  
Scaling Functions ◽  
Self Similarity ◽  
Simple Diffusion ◽  
Early Stages ◽  
Space And Time

The self-similarity in space and time (hereafter self-similarity), either deterministic or statistical, is characterized by similarity exponents and a function of scaled variable, called the scaling function. In the present paper, we address mainly the self-similarity in the limit of early stage, as opposed to the latter one, and also consider the scaling functions that decay or grow algebraically, as opposed to the rapidly decaying functions such as Gaussian or error function. In particular, in the case of simple diffusion, our symmetry analysis shows a mathematical mechanism by which the rapidly decaying scaling functions are generated by other polynomial scaling functions. While the former is adapted to the self-similarity in the late-stage processes, the latter is adapted to the early stages. This paper sheds some light on the internal structure of the family of self-similarities generated by a simple diffusion equation. Then, we present an example of self-similarity for the late stage whose scaling function has power-law tail, and also several cases of self-similarity for the early stages. These examples show the utility of self-similarity to a wider range of phenomena other than the late stage behaviors with rapidly decaying scaling functions.

scholarly journals The Method of Energy-Efficiency Investigations of the Newly Produced Marine Fuels Through an Application of the Laboratory Diesel Engine

2018 ◽  
Vol 1 (1) ◽  
pp. 357-363
Author(s):  
Zbigniew Korczewski
Keyword(s):  
Water Management ◽  
Diesel Engine ◽  
The Self ◽  
Environment Protection ◽  
Test Bed ◽  
Marine Fuel ◽  
Energy Profiles ◽  
Scientific Issue ◽  
Energy Flows ◽  
Effective Manner

Abstract The article deals with one of the scientific issue solved within frames of the research project financed by Voivodeship Fund for Environmental Protection and Water Management in Gdansk, namely, in particular, the method of energy investigations of the self-ignition engine in conditions of its supply with a non-standard (modified) marine fuel. The representative results of engine tests worked out on the especially built laboratory test bed have been presented. They aimed to elaborate energy profiles of a single-cylinder four-stroke Diesel engine in the form of Sankey diagrams of energy flows representing the most efficient and effective manner for the verification of a different kind of the modified marine fuels introduced on market. It is expected that the final results of the project will be interesting for their producers as well as the ship-owners of the operated ships, and also for the offices of sea administration as well as the inspectorates of environment protection.

Design and Implementation of an Object-Oriented Cooperative Distributed Problem Solving Shell

1996 ◽  
Author(s):  
Feng-Chao Yang ◽  
Yu-Kuen Ho
Keyword(s):  
Problem Solving ◽  
Layer Structure ◽  
Group Structure ◽  
Object Oriented ◽  
Distributed Artificial Intelligence ◽  
Prototype System ◽  
Test Bed ◽  
Application Systems ◽  
Distributed Problem Solving ◽  
Cooperative Distributed Problem Solving

Abstract In this paper an Object-Oriented Cooperative Distributed Problem Solving Shell (OOCDPSS) is presented. It is a convenient and effective building tool for the cooperative multi-agent application systems under distributed computer environment. By the Distributed Artificial Intelligence technique and the Object-Oriented concept, each agent is constructed by multi-layer structure to reduce the design complexity and give more flexibility, and they are arranged as a recurrent group structure for run-time effective management. Additionally, the idea of mediator is adopted to integrate new information systems with the existing inflexible legacy system, and the distributed whiteboard agent is used for the information interchange among the agents. This prototype system has been completed and used as the test bed of our other laboratory projects.

Mίνθa

2012 ◽  
pp. 175-197
Author(s):  
Jörn Guy Süß ◽  
Neil Robinson ◽  
David Carrington ◽  
Paul Strooper
Keyword(s):  
Software Engineering ◽  
Software Development ◽  
Object Oriented ◽  
Safety Critical ◽  
Development Framework ◽  
Code Generators ◽  
Application Logic ◽  
The Cost ◽  
Framework Development ◽  
The Way

Implementation of railway controller application logic is a highly safety-critical and time-consuming task carried out individually for each client and station by specialised signalling engineers, with corresponding high costs. M???a is a software development framework designed to create code generators for application logic for the client railway companies of Ansaldo STS that use the Microlok II controller to lower the cost and increase repeatability. This chapter describes the evolution of M???a from prototype to framework, and introduces the software engineering approaches of object-oriented meta-modelling and framework development along the way. It also presents known limitations and further application areas of the framework.

Design and Development for the Self-Expandable Packer Test-Bed

2013 ◽  
Vol 427-429 ◽  
pp. 2050-2053
Author(s):  
Jian Jun Qin ◽  
Yan Hua ◽  
Zhen Long He
Keyword(s):  
High Pressure ◽  
Modular Design ◽  
Performance Testing ◽  
The Self ◽  
Detailed Data ◽  
Test Bed ◽  
Existing Problems ◽  
Packer Test ◽  
Open Hole ◽  
High Pressure Environment

A new self-expandable packer test-bed for performance testing is developed against many problems of self-expandable packer test-beds which are in existence during detection process, for instance, imitative open hole cannot be used to detect environments in the downhole, size of a specimen for detection is undersize, pressure in experiments is low and detailed data cannot be gathered in development phrase. The new test-bed makes autoclave a modular design, which can test various performance of a specimen in a high-pressure environment and match relevant replacement parts of autoclave with the purpose of doing a variety of experiments on specimens. In this way, many existing problems of test-bed during the experiments can be solved.

Study on the Multifunctional Bearing Test-Bed for Testing the Limit PV Performance

2008 ◽  
Vol 381-382 ◽  
pp. 203-206
Author(s):  
J.W. Yu ◽  
T. You ◽  
Xiao Fen Yu
Keyword(s):  
Working Conditions ◽  
Object Oriented ◽  
Test Bed ◽  
Load Spectrum ◽  
Control Software ◽  
Sliding Bearings ◽  
Limit Values ◽  
The Stability ◽  
And Control ◽  
Measurement And Control

So-called PV value can reflect the synthetic using performance of sliding bearings and the limit pressure of the lubricant. The newly developed multifunctional tester was introduced in this paper for investigating the PV limit values of bearings, in which the speed spectrum and load spectrum were first timely introduced to simulate the bearings' actual working conditions. In this test-bed, four samples, i.e., four friction couples can be dynamically and synchronously tested and measured. The developed measurement and control software based on object –oriented language has the functions of data collecting, processing, alarming and controlling etc. In the system, several measures have been taken to resist electromagnetism disturbances in both hardware and software parts. The disturbance signals have been effectively screened and restrained, so as to the stability and precision of the tested data have been greatly improved.

scholarly journals Xenological Subjectivity: Rosi Braidotti and Object-Oriented Ontology

2021 ◽  
Vol 4 (1) ◽  
pp. 311-334
Author(s):  
Jordi Vivaldi
Keyword(s):  
Ecological Model ◽  
Object Oriented ◽  
The Self ◽  
The World ◽  
Ontological Model ◽  
Object Oriented Ontology ◽  
The Way

Abstract The conceptualization of the notion of subjectivity within the Anthropocene finds in Rosi Braidotti’s posthumanism one of its most explicit and profuse modulations. This essay argues that Braidotti’s model powerfully accounts for the Anthropocene’s subjectivity by conceiving the “self” as a transversal multiplicity and its relationality to the “others” and the “world” as non-hierarchized by nature–culture distinctions; however, by being ontologically grounded on a neo-Spinozistic monism, Braidotti’s model blurs the notions of finitude, agency, and change, obscuring the possibility of critical dissent while decreasing the overall theory’s consistency. An alternative ontological model capitalizing on these elements can be found in Object-Oriented Ontology (OOO) and its notion of withdrawal. By associating OOO’s non-onto-taxonomical pluralism with Braidotti’s posthuman subjectivity, this essay aims at ontologically discretizing the latter in order to overcome these limitations. Grounded on this association and invoking a narrative imaginary propelled by the Greek terms xenos (guest-friend) and xenia (hospitality), the article paves the way for a form of subjectivity deviating from Braidotti’s ecological model and defined as xenological, arguing that, within the context of the Anthropocene, it constitutes an adequate alternative to Braidotti’s subjectivity.

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