A task assignment strategy for crowdsourcing-based web accessibility evaluation system

2017 ◽  
Author(s):  
Liangcheng Li ◽  
Can Wang ◽  
Shuyi Song ◽  
Zhi Yu ◽  
Fenqin Zhou ◽  
...  
Keyword(s):  
Evaluation System ◽  
Task Assignment ◽  
Web Accessibility ◽  
Accessibility Evaluation ◽  
Assignment Strategy

A Methodology for Web Accessibility Development and Maintenance

2007 ◽  
pp. 185-208 ◽  
Author(s):  
Julio Abascal ◽  
Myriam Arrue ◽  
Markel Vigo
Keyword(s):  
Web Sites ◽  
Web Design ◽  
Web Accessibility ◽  
Work Conditions ◽  
Web Engineering ◽  
Standard Equipment ◽  
Evaluation Methodologies ◽  
Accessibility Evaluation ◽  
Legal Restrictions ◽  
Basic Concepts

Web design and evaluation are currently framed by legal restrictions and social demands for full accessibility. The main reason is that currently most web sites are not accessible for people with physical, sensory or cognitive restrictions due to diverse causes, such as disability, use of non-standard equipment or special work conditions. Accessibility awareness has advanced considerably in recent years, but designers are still having difficulties in updating or creating new accessible pages. Even though useful tools and sound evaluation methodologies are being designed, they are of no use if they are not integrated into the standard web design lifecycle, interacting naturally with common design and authoring tools. This chapter introduces the basic concepts related to web accessibility and proposes a method for including accessibility in standard web engineering methodologies. The key phases, accessibility, evaluation and maintenance, are described in detail. Finally, a model is proposed for implementing accessibility policy in organizations.

Dynamic Dependent Tasks Assignment for Grid Computing

2011 ◽  
Vol 3 (2) ◽  
pp. 44-58 ◽  
Author(s):  
Meriem Meddeber ◽  
Belabbas Yagoubi
Keyword(s):  
Resource Management ◽  
Grid Computing ◽  
Large Scale ◽  
Task Assignment ◽  
Considerable Effect ◽  
Distributed Applications ◽  
Grid Middleware ◽  
Assignment Strategy ◽  
Transfer Cost ◽  
Dependent Tasks

A computational grid is a widespread computing environment that provides huge computational power for large-scale distributed applications. One of the most important issues in such an environment is resource management. Task assignment as a part of resource management has a considerable effect on the grid middleware performance. In grid computing, task execution time is dependent on the machine to which it is assigned, and task precedence constraints are represented by a directed acyclic graph. This paper proposes a hybrid assignment strategy of dependent tasks in Grids which integrate static and dynamic assignment technologies. Grid computing is considered a set of clusters formed by a set of computing elements and a cluster manager. The main objective is to arrive at a method of task assignment that could achieve minimum response time and reduce the transfer cost, inducing by the tasks transfer respecting the dependency constraints.

scholarly journals Web Accessibility Evaluation Tools: A Survey and Some Improvements

2006 ◽  
Vol 157 (2) ◽  
pp. 87-100 ◽  
Author(s):  
Vicente Luque Centeno ◽  
Carlos Delgado Kloos ◽  
Jesús Arias Fisteus ◽  
Luis Álvarez Álvarez
Keyword(s):  
Web Accessibility ◽  
Evaluation Tools ◽  
Accessibility Evaluation

Research on MapReduce Task Dynamic Balancing Strategy Based on File Label

2014 ◽  
Vol 571-572 ◽  
pp. 17-21
Author(s):  
Rong Huang ◽  
An Ping Xiong ◽  
Yang Zou
Keyword(s):  
Execution Time ◽  
Task Assignment ◽  
Total Execution Time ◽  
Dynamic Balancing ◽  
Processing Efficiency ◽  
The Core ◽  
Different Types ◽  
Assignment Strategy ◽  
Computing Performance ◽  
Core Framework

MapReduce is one of the core framework of Hadoop, it’s computing performance has been widely concerned and researched. In heterogeneous environment, unreasonable map task assignments and inefficient resource utilization lead to multiple backup tasks and the job total execution time is poor.For these problems, this paper proposes a new map task assignment strategy, which is map task dynamic balancing strategy based on file label. The strategy marks on job according to the different types, estimates node computing capabilities and historical processing efficiency of each label task, ensures map task which was assigned can execute successfully. Experiments show that, the strategy can effectively reduce number of backup tasks in map phase, and to some extent optimize the total execution time of the job.

Accessibility Evaluation in Aircraft Cabin Based on Virtual Reality

2014 ◽  
Vol 651-653 ◽  
pp. 1511-1514 ◽  
Author(s):  
Xian Li ◽  
Hu Liu
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Evaluation System ◽  
Tracking System ◽  
Rapid Development ◽  
New Method ◽  
Air Transport ◽  
Aircraft Cabin ◽  
Air Transport Industry ◽  
Accessibility Evaluation

With the rapid development of the air transport industry, more attention is paid to interior ergonomics analysis which directly affects the time and cost spent during design. To provide a quick and human-in-loop accessibility way to evaluate accessibility in aircraft cabin, a new method based on virtual reality is proposed. In this method, the digital mock-up model is converted to other format which is need to build a virtual environment first, then virtual environment is built and a virtual hand is driven through tracking hand’s position by A.R.T(Advanced Realtime Tracking ) system to carry on accessibility evaluation in the virtual environment. Based on above-mentioned method the aircraft cabin accessibility evaluation system is designed and realized, which is verified by one case of a certain aircraft cabin. The result shows this method is simple and useful, offering a new way for accessibility evaluation in aircraft cabin.

scholarly journals Requirements for Large Scale Web Accessibility Evaluation

2020 ◽  
pp. 275-283
Author(s):  
Fabio Paternò ◽  
Francesca Pulina ◽  
Carmen Santoro ◽  
Henrike Gappa ◽  
Yehya Mohamad
Keyword(s):  
Large Scale ◽  
Web Applications ◽  
Web Accessibility ◽  
Online Information ◽  
Automatic Evaluation ◽  
Web Resources ◽  
Accessibility Evaluation ◽  
Accessibility Issues ◽  
Evaluation And Monitoring ◽  
Over Time

Abstract The recent European legislation emphasizes the importance of enabling people with disabilities to have access to online information and services of public sector bodies. To this regard, automatic evaluation and monitoring of Web accessibility can play a key role for various stakeholders involved in creating and maintaining over time accessible products. In this paper we present the results of elicitation activities that we carried out in a European project to collect experience and feedback from Web commissioners, developers and content authors of websites and web applications. The purpose was to understand their current practices in addressing accessibility issues, identify the barriers they encounter when exploiting automatic support in ensuring the accessibility of Web resources, and receive indications about what functionalities they would like to exploit in order to better manage accessibility evaluation and monitoring.

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