In this paper we present the architecture and the prototype implementation of HybridFlow, a system for processing and delivering very high definition video. It is designed to handle the challenges that arise in hybrid...
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ISBN:
(纸本)9781467364041;9781467364034
In this paper we present the architecture and the prototype implementation of HybridFlow, a system for processing and delivering very high definition video. It is designed to handle the challenges that arise in hybrid distributed infrastructures. It does so by implementing a number of software components that select and manage storage, computation and network resources in order to meet the Quality of Service levels desired by the user. One advantage our our system that has facilitated its adoption by CineGrid, an interdisciplinary community focused on the digital cinema domain, is that it shields the end user from the details of the IT infrastructure and allows users from different member organizations to use any resource available in the community. The dynamic nature of the infrastructure makes it susceptible to bottlenecks and our prototype focuses on determining I/O hotspots. At the core of the system lie resource descriptions based on semantic web ontologies that provide information about the existing resources. By using them, the resource selection process is optimized and in line with the application's estimated demands. In this work we focus on the I/O performance as a bottleneck type. We show how HybridFlow can be used in the typical scenario of a video processing pipeline to identify bottlenecks and work towards achieving the desired QoS levels while keeping resource utilization optimal.
This paper presents a Matlab-based software (MathWorks inc.) called BioSigPlot for the visualization of multi-channel biomedical signals, particularly for the EEG. This tool is designed for researchers on both enginee...
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ISBN:
(纸本)9781457702167
This paper presents a Matlab-based software (MathWorks inc.) called BioSigPlot for the visualization of multi-channel biomedical signals, particularly for the EEG. This tool is designed for researchers on both engineering and medicine who have to collaborate to visualize and analyze signals. It aims to provide a highly customizable interface for signal processing experimentation in order to plot several kinds of signals while integrating the common tools for physician. The main advantages compared to other existing programs are the multi-dataset displaying, the synchronization with video and the online processing. On top of that, this program uses objectorientedprogramming, so that the interface can be controlled by both graphic controls and command lines. It can be used as EEGlab plug-in but, since it is not limited to EEG, it would be distributed separately. BioSigPlot is distributed free of charge (http://***), under the terms of GNU Public License for non-commercial use and open source development.
The development of defect tests is still a very labour intensive process that demands a high-level of domain knowledge, concentration and problem awareness from software engineers. Any technology that can reduce the m...
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ISBN:
(纸本)9781467361613
The development of defect tests is still a very labour intensive process that demands a high-level of domain knowledge, concentration and problem awareness from software engineers. Any technology that can reduce the manual effort involved in this process therefore has the potential to significantly reduce software development costs and time consumption. An idea for achieving this is to reuse the knowledge bound up in already existing test cases, either directly or indirectly, to assist in the development of tests for new software components and systems. Although general software reuse has received a lot of attention in the past - both in academia and industry - previous research has focussed on the reuse and recommendation of existing software artifacts in the creation of new product code rather than on the recommendation of tests. In this paper we focus on the latter, and present a novel automated test recommendation approach that leverages lessons learned from traditional software reuse to proactively make test case suggestions while an engineer is developing tests. In contrast, most existing testing-assistance tools provide ex post assistance to test developers in the form of coverage assessments and test quality evaluations. Our goal is to create an automated, non-intrusive recommendation system for efficient software test development. In this paper we set out the basic strategy by which this can be achieved and present a prototypical implementation of our test recommender system for Eclipse.
Our aim is to contribute to bridging the gap between the justified need from industry to reuse third-party components and skepticism of the safety community in integrating and reusing components developed without real...
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ISBN:
(纸本)9781479925520
Our aim is to contribute to bridging the gap between the justified need from industry to reuse third-party components and skepticism of the safety community in integrating and reusing components developed without real knowledge of the system context. We have developed a notion of safety contract that will help to capture safety-related information for supporting the reuse of software components in and across safety-critical systems. In this paper we present our extension of the contract formalism for specifying strong and weak assumption/guarantee contracts for out-of-context reusable components. We elaborate on notion of satisfaction, including refinement, dominance and composition check. To show the usage and the expressiveness of our extended formalism, we specify strong and weak safety contracts related to a wheel braking system.
Get started creating Android apps with Java in no time!The demand for Android apps is not slowing down but many mobile developers who want to create Android apps lack the necessary Java background. This beginner guide...
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ISBN:
(数字)9781118612125
ISBN:
(纸本)1118504380;9781118504383
Get started creating Android apps with Java in no time!The demand for Android apps is not slowing down but many mobile developers who want to create Android apps lack the necessary Java background. This beginner guide gets you up and running with using Java to create Android apps with no prior knowledge or experienced necessary!Shows you the basic Java development concepts and techniques that are necessary to develop Android appsExplores what goes into creating an Android app to give you a better understanding of the various elementsAddresses how to deal with standard programming challenges and debuggingBeginning Android programming with Java For Dummies puts you well on your way toward creating Android apps quickly with Java.
The AUTOSAR (AUTomotive Open System ARchilecture) is an open standard in automotive industry, aiming at unifying the methodology of the automotive software development. It is drawing increasing attention because of it...
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ISBN:
(纸本)9780769550534
The AUTOSAR (AUTomotive Open System ARchilecture) is an open standard in automotive industry, aiming at unifying the methodology of the automotive software development. It is drawing increasing attention because of its great concern about the safety of automotive electronics. The safety of automotive electronics greatly depends on the Operating System (OS) components, which fully implement the functionality part of automotive applications. However, taking the complex timing protection mechanism of AUTOSAR OS and random occurrences of interrupt requests (IRs) into consideration, it is hard for the developers to design and configure the OS components correctly or even reconcilably. In this paper, we focus on the timing properties and propose an automatic verification framework, in which developers could analyze the timing behaviors and devise the OS components configuration. Furthermore, three important timing properties are expressed and can be verified in our framework, namely, schedulability, non-fault-propagation, and consistency. As a reduced version of AUTOSAR OS and auxiliary analysis modules have been implemented based on Real-Time Maude, developers could easily employ the tool to experiment with different configurations of OS components.
Tracking ground targets using low cost ground-based sensors is a challenging field because of the limited capabilities of such sensors. Among the several candidates, including seismic and magnetic sensors, the acousti...
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ISBN:
(纸本)9780819497680
Tracking ground targets using low cost ground-based sensors is a challenging field because of the limited capabilities of such sensors. Among the several candidates, including seismic and magnetic sensors, the acoustic sensors based on microphone arrays have a potential of being useful: They can provide a direction to the sound source, they can have a relatively better range, and the sound characteristics can provide a basis for target classification. However, there are still many problems. One of them is the difficulty to resolve multiple sound sources, another is that they do not provide distance, a third is the presence of background noise from wind, sea, rain, distant air and land traffic, people, etc., and a fourth is that the same target can sound very differently depending on factors like terrain type, topography, speed, gear, distance, etc. Use of sophisticated signal processing and data fusion algorithms is the key for compensating (to an extend) the limited capabilities and mentioned problems of these sensors. It is hard, if not impossible, to evaluate the performance of such complex algorithms analytically. For an effective evaluation, before performing expensive field trials, well-designed laboratory experiments and computer simulations are necessary. Along this line, in this paper, we present an object-oriented modeling and simulation framework which can be used to generate simulated data for the data fusion algorithms for tracking multiple on-road targets in an unattended acoustic sensor network. Each sensor node in the network is a circular microphone array which produces the direction of arrival (DOA) (or bearing) measurements of the targets and sends this information to a fusion center. We present the models for road networks, targets (motion and acoustic power) and acoustic sensors in an object-oriented fashion where different and possibly time-varying sampling periods for each sensor node is possible. Moreover, the sensor's signal processing and d
Executing thorough test suites allows programmers to strengthen the confidence on their software systems. However, given some failed test cases, finding the faults' locations can be a difficult task, thereby techn...
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ISBN:
(纸本)9780769549934;9781479913244
Executing thorough test suites allows programmers to strengthen the confidence on their software systems. However, given some failed test cases, finding the faults' locations can be a difficult task, thereby techniques that make it easier for the programmer to locate the faulty components are much desirable. In this paper we focus on finding faults in object-oriented, more precisely Java, implementations of data types that are described by algebraic specifications. We capitalize on models for the specification under study and JUnit test suites that cover all axioms of the specification, and present a collection of techniques and underlying methodology, that give the programmer, in a transparent way, a means to locate the fault that causes the implementation to violate the specification. We also present a comparative experiment that was carried out to evaluate this approach where very encouraging results were obtained.
Timed Modelling Spider Diagrams (TMSDs) are a visual language which supports the modeling of object-oriented systems with time constraints. They are used to define policies in which TMSDs specify admissible evolutions...
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ISBN:
(纸本)9781479903696
Timed Modelling Spider Diagrams (TMSDs) are a visual language which supports the modeling of object-oriented systems with time constraints. They are used to define policies in which TMSDs specify admissible evolutions of the state of some instance. We define a process for deriving a rewriting system from a policy specification, so that the generated system defines a language of sequences of basic TMSDs satisfying the policy. Moreover, by identifying the different ways in which the constraints set by the policy can be violated, we can produce special rules whose application results in erroneous sequences. The resulting transformation systems can be used both to simulate possible behaviours when reasoning on the definition of policies and to test policy verification algorithms.
The agent-oriented computing is a technique for generating the agent who operates autonomously according to the behavior knowledge. Moreover, agent can have the characteristic called "Learning" skill. More e...
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ISBN:
(纸本)9781479907816
The agent-oriented computing is a technique for generating the agent who operates autonomously according to the behavior knowledge. Moreover, agent can have the characteristic called "Learning" skill. More efficient operation of agents can be expected by realizing "Learning" skill. In this research, our aim is to support agent designer who designs and develops the intelligent agent system equipped with "Learning" skill. We propose inter active design environment for agent system with learning mechanism using repository-based agent framework called DASH framework. Proposed framework enables agent designer to design and implement the learning agents without highly expertise, therefore we can reduce the designer's bur den. In this paper, we explain the DASH framework, Q-learning, Profit Sharing and proposed design environment. Moreover we show the effectiveness of the proposal method through the some experiments.
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