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SACMAT
2009
ACM
14 years 2 months ago
Towards formal security analysis of GTRBAC using timed automata
An access control system is often viewed as a state transition system. Given a set of access control policies, a general safety requirement in such a system is to determine whethe...
Samrat Mondal, Shamik Sural, Vijayalakshmi Atluri
VLDB
2002
ACM
198views Database» more  VLDB 2002»
13 years 7 months ago
A New Passenger Support System for Public Transport using Mobile Database Access
We have been developing a mobile passenger support system for public transport. Passengers can make their travel plans and purchase necessary tickets by accessing databases via th...
Koichi Goto, Yahiko Kambayashi
W4A
2009
ACM
14 years 2 months ago
Accessibility perspectives on enabling South African sign language in the South African national accessibility portal
Persons with disabilities are often marginalised from economy and society due to the lack of access to disability related information and services. Through the use of assistive te...
Louis Coetzee, Guillaume J.-L. Olivrin, Ilse Vivie...
CSCW
2012
ACM
12 years 3 months ago
See friendship, sort of: how conversation and digital traces might support reflection on friendships
Inspired by conversational visualization tools and the increasing enactment of relationships in social media, we examine how people reflect on friendships and how social data and ...
Victoria Schwanda Sosik, Xuan Zhao, Dan Cosley
MVA
2002
178views Computer Vision» more  MVA 2002»
13 years 7 months ago
Advanced Image Retrieval Using Multi-resolution Image Content
We introduce an image retrieval method for searchingan image database by using a query image that has similarity in its global and/or regional image contents to the intended targe...
Motohide Yoshimura, Hajime Kiyose, Shigeo Abe