218,388 research outputs found
Efficient and Extensible Policy Mining for Relationship-Based Access Control
Relationship-based access control (ReBAC) is a flexible and expressive
framework that allows policies to be expressed in terms of chains of
relationship between entities as well as attributes of entities. ReBAC policy
mining algorithms have a potential to significantly reduce the cost of
migration from legacy access control systems to ReBAC, by partially automating
the development of a ReBAC policy. Existing ReBAC policy mining algorithms
support a policy language with a limited set of operators; this limits their
applicability. This paper presents a ReBAC policy mining algorithm designed to
be both (1) easily extensible (to support additional policy language features)
and (2) scalable. The algorithm is based on Bui et al.'s evolutionary algorithm
for ReBAC policy mining algorithm. First, we simplify their algorithm, in order
to make it easier to extend and provide a methodology that extends it to handle
new policy language features. However, extending the policy language increases
the search space of candidate policies explored by the evolutionary algorithm,
thus causes longer running time and/or worse results. To address the problem,
we enhance the algorithm with a feature selection phase. The enhancement
utilizes a neural network to identify useful features. We use the result of
feature selection to reduce the evolutionary algorithm's search space. The new
algorithm is easy to extend and, as shown by our experiments, is more efficient
and produces better policies
Environmental sustainability in the mining sector: evidence from Catalan companies
This paper examines the adoption of environmental practices in small and medium sized companies inthe surface mining industry in Catalonia (Spain). To fulfill this aim, a survey of 41 items concernint environmental management systems and environmentally sustainable practices has been conducted.
Results show that companies have committed themselves to environmental and sustainable issues. The majority of companies claim to understand the effects of their activities on the environment and they care for responsible access and management of natural resources. Restoration plans and the annual waste declaration are mandatory in Catalonia, and rational resources exploitation practices have been adopted by a high percentage of mines. Finally, some examples of good environmentally sustainable practices are introduced.Peer ReviewedPostprint (author’s final draft
Corporate Social Responsibility in the Diamond Mining Industry on the West Coast of South Africa
the study was aimed at seeing how communities benefit from minin
Conference News: Social Policy in Mineral-Rich Countries
This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.UNRISD_SocialPolicyInMineralRichCountries.pdf: 189 downloads, before Oct. 1, 2020
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