Accessibility Evaluation Method based on D-H Model and Comfort

2021 ◽  
Author(s):  
Hongduo Wu ◽  
Dong Zhou ◽  
Yuning Liang ◽  
Ziyue Guo ◽  
Yan Wang
Keyword(s):  
Evaluation Method ◽  
Accessibility Evaluation

Evaluation of Web Accessibility

2013 ◽  
pp. 1012-1029
Author(s):  
Sergio Luján-Mora ◽  
Firas Masri
Keyword(s):  
Qualitative Methods ◽  
Quantitative Methods ◽  
Evaluation Method ◽  
Web Accessibility ◽  
Evaluation Methods ◽  
Qualitative And Quantitative ◽  
Internet Users ◽  
Accessibility Evaluation ◽  
Accessibility Guidelines ◽  
The Web

The Web is present in all fields of our life, from information and service Web pages to electronic public administration (e-government). Users of the Web are a heterogeneous and multicultural public, with different abilities and disabilities (visual, hearing, cognitive, and motor impairments). Web accessibility is about making websites accessible to all Internet users (both disabled and non-disabled). To assure and certify the fulfillment of Web accessibility guidelines, various accessibility evaluation methods have been proposed, and are classified in two types: qualitative methods (analytical and empirical) and quantitative methods (metric-based methods). As no method by itself is enough to guarantee full accessibility, many studies combine these qualitative and quantitative methods in order to guarantee better results. Some recent studies have presented combined evaluation methods between qualitative methods only, thus leaving behind the great power of metrics that guarantee objective results. In this chapter, a combined accessibility evaluation method based both on qualitative and quantitative evaluation methods is proposed. This proposal presents an evaluation method combining essential analytical evaluation methods and empirical test methods.

The Method of Equipment Maintenance Accessibility Evaluation Based on Index Correlation Degree

2013 ◽  
Vol 401-403 ◽  
pp. 500-503
Author(s):  
Da Xu ◽  
Bao Qi Wang ◽  
Chuang Li ◽  
Xi Wu
Keyword(s):  
Virtual Environment ◽  
Evaluation Method ◽  
Equipment Maintenance ◽  
Correlation Degree ◽  
Accessibility Evaluation

Aiming at the disadvantage of existing equipment maintenance accessibility evaluation method, this paper studied the project of equipment maintenance accessibility evaluation. a method of equipment maintenance accessibility evaluation in the virtual environment is put forward based on Matrices Permanent and index correlation degree , at last an example is given. It is significant for developing maintainability verification and increasing Equipment Maintainability in the course of equipment digital mock-up designing.

scholarly journals Maintenance Accessibility Evaluation Method based on D-H Model and Comfort in a Virtual Maintenance Environment

2021 ◽  
Author(s):  
Dong Zhou ◽  
Hongduo Wu ◽  
Ziyue Guo ◽  
Qidi Zhou ◽  
Yuning Liang
Keyword(s):  
Virtual Environment ◽  
Human Body ◽  
Evaluation System ◽  
Degrees Of Freedom ◽  
Evaluation Method ◽  
Evaluation Tool ◽  
Envelope Surface ◽  
Accessibility Evaluation ◽  
Virtual Maintenance ◽  
Surface Construction

Abstract In virtual maintenance, the most widely used accessibility evaluation method is to use virtual human reach envelope surface to judge and evaluate accessibility. However, this method can only give two kinds of evaluation results: reachable and unreachable. There is not enough data and theoretical support for the construction of envelope surface, and the precision and accuracy of evaluation need to be improved. In this paper, a parameterized accessibility evaluation method and a method of accessibility envelope surface construction are proposed. Firstly, to objectively describe the movement of human body, a 6-joint and 5-link D-H (Denavit-Hartenberg) link model is established from the waist to the fingertip of the human body, and the ranges of 10 degrees of freedom and angles related to accessibility are determined according to ergonomics. Then, comfort is introduced to refine the accessibility evaluation, and a multi-level accessibility evaluation system based on comfort is constructed according to RULA (the rapid upper limb assessment). In order to facilitate the application of this method in virtual environment, a method of accessibility envelope surface construction is proposed. Firstly, the reachable points are generated by Monte Carlo simulation based on the D-H model. Secondly, the accessibility envelope surface is composed of the outermost random reachable points. Finally, the comparison experiment with the reachable envelope provided by DELMIA in virtual environment shows that the proposed method is more accurate, meticulous and objective. Based on this method, an accessibility evaluation tool has been developed in CATIA and has been applied in some scientific research institutes.

scholarly journals The Design of Application-Specific Heuristics for the Usability Evaluation of the Digital Doorway

2012 ◽  
Vol 48 ◽  
Author(s):  
Funmi Adebesin ◽  
Paula Kotze
Keyword(s):  
South African ◽  
Interaction Design ◽  
Computer Literacy ◽  
Formative Evaluation ◽  
Design Research ◽  
Evaluation Method ◽  
Usability Evaluation ◽  
Accessibility Evaluation ◽  
Application Developers ◽  
Application Specific

The Digital Doorway (DD) is a joint initiative between the South African Department of Science and Technology (DST) and the Meraka Institute of the Council for Scientific and Industrial Research (CSIR). The DD is a non-standard computer system deployed amongst underprivileged communities in South Africa with the objective to promote computer literacy. Since its inception, there has been no usability or accessibility evaluation of the software installed on the DD, mainly due to lack of usability engineering or interaction design expertise within the development team. The goal of the research presented in this paper was to design a solution to this problem by developing a suitable instrument that could guide DD application developers in the design and development of more usable DD software and interfaces. Design research was used as a research methodology. We first investigated the applicability of the standard usability and accessibility evaluation methods for evaluating the software installed on the DD. During the first cycle of design research, we established that a heuristic-like evaluation method would be an appropriate method for evaluating the usability and direct accessibility support provided by the DD. During a second cycle of design research, embedded in the first, we also developed a set of multi-category heuristics as the ‘instrument’ that could guide the developers during design of applications as well as in the first-level (formative) evaluation thereof. To verify the heuristics, we conducted a usability evaluation of the DD and triangulated the results with a direct field observation at a natural environment of DD use, together with user-administered questionnaires.

Evaluation Implementation for Accessibility of Urban Public Green Space Based on ArcGIS Engine

2012 ◽  
Vol 459 ◽  
pp. 247-251 ◽  
Author(s):  
Pei Hong Li ◽  
Xiao Yu Zhang ◽  
Fei Hui Hu
Keyword(s):  
Decision Making ◽  
Path Analysis ◽  
Green Space ◽  
Evaluation Method ◽  
Accessibility Evaluation ◽  
Arcgis Engine ◽  
Public Green Space ◽  
Geographical Characteristics

According to the geographical characteristics of urban public green space, the paper analyzes the factors and indexes which influence accessibility evaluation. Combining analysis functions of GIS desktop software, the paper proposes the accessibility evaluation method of urban public green space (UPGS) based on the accessibility path analysis, and then implements the function of accessibility path analysis to UPGS using ArcGIS Engine technology. This method can not only evaluate the existing UPGS, but also help the unestablished park to determine the location, and plays a certain decision-making role

Evaluation of Web Accessibility

2013 ◽  
pp. 314-331 ◽  
Author(s):  
Sergio Luján-Mora ◽  
Firas Masri
Keyword(s):  
Qualitative Methods ◽  
Quantitative Methods ◽  
Evaluation Method ◽  
Web Accessibility ◽  
Evaluation Methods ◽  
Qualitative And Quantitative ◽  
Internet Users ◽  
Accessibility Evaluation ◽  
Accessibility Guidelines ◽  
The Web

The Web is present in all fields of our life, from information and service Web pages to electronic public administration (e-government). Users of the Web are a heterogeneous and multicultural public, with different abilities and disabilities (visual, hearing, cognitive, and motor impairments). Web accessibility is about making websites accessible to all Internet users (both disabled and non-disabled). To assure and certify the fulfillment of Web accessibility guidelines, various accessibility evaluation methods have been proposed, and are classified in two types: qualitative methods (analytical and empirical) and quantitative methods (metric-based methods). As no method by itself is enough to guarantee full accessibility, many studies combine these qualitative and quantitative methods in order to guarantee better results. Some recent studies have presented combined evaluation methods between qualitative methods only, thus leaving behind the great power of metrics that guarantee objective results. In this chapter, a combined accessibility evaluation method based both on qualitative and quantitative evaluation methods is proposed. This proposal presents an evaluation method combining essential analytical evaluation methods and empirical test methods.

Evaluation method for imaging plate resolution by means of phase contrast transfer function

1995 ◽  
Vol 53 ◽  
pp. 662-663 ◽  
Author(s):  
T. Oikawa ◽  
H. Kosugi ◽  
F. Hosokawa ◽  
D. Shindo ◽  
M. Kersker
Keyword(s):  
Transfer Function ◽  
Phase Contrast ◽  
Evaluation Method ◽  
Amorphous Film ◽  
Imaging Plate ◽  
X Rays ◽  
Special Shape ◽  
Contrast Transfer Function ◽  
Contrast Image ◽  
Specimen Shape

Evaluation of the resolution of the Imaging Plate (IP) has been attempted by some methods. An evaluation method for IP resolution, which is not influenced by hard X-rays at higher accelerating voltages, was proposed previously by the present authors. This method, however, requires truoblesome experimental preperations partly because specially synthesized hematite was used as a specimen, and partly because a special shape of the specimen was used as a standard image. In this paper, a convenient evaluation method which is not infuenced by the specimen shape and image direction, is newly proposed. In this method, phase contrast images of thin amorphous film are used.Several diffraction rings are obtained by the Fourier transformation of a phase contrast image of thin amorphous film, taken at a large under focus. The rings show the spatial-frequency spectrum corresponding to the phase contrast transfer function (PCTF). The envelope function is obtained by connecting the peak intensities of the rings. The evelope function is offten used for evaluation of the instrument, because the function shows the performance of the electron microscope (EM).

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