Ana Margarida Ferreira

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—Access control models describe frameworks that dictate how subjects (e.g. users) access resources. In the Role-Based Access Control (RBAC) model access to resources is based on the role the user holds within the organization. RBAC is a rigid model where access control decisions have only two output options: Grant or Deny. Break The Glass (BTG) policies on(More)
The Electronic Medical Record (EMR) integrates heterogeneous information within a Healthcare Institution stressing the need for security and access control. The Biostatistics and Medical Informatics Department from Porto Faculty of Medicine has recently implemented a Virtual EMR (VEMR) in order to integrate patient information and clinical reports within a(More)
Data retrieval and its integration is one of the major problems that face large and complex health organizations. This is especially relevant when patient information is produced in heterogeneous environments. Implementing a Virtual Electronic Patient Record (VEPR) system may provide an adequate and cost-effective solution for most clinical information(More)
PURPOSE The objective of this paper is to show that grounded theory (GT), together with mixed methods, can be used to involve healthcare professionals in the design and enhancement of access control policies to Electronic Medical Record (EMR) systems. METHODS The mixed methods applied for this research included, in this sequence, focus groups (main(More)
BACKGROUND Propolis is a resin collected by bees from plant buds and exudates, which is further processed through the activity of bee enzymes. Propolis has been shown to possess many biological and pharmacological properties, such as antimicrobial, antioxidant, immunostimulant and antitumor activities. Due to this bioactivity profile, this resin can become(More)