An IoT-enabled Framework for Context-aware Role-based Access Control

We present a framework for enforcing the application of context-aware Role-based Access Control policies based on an Internet of Things eco-system inspired by the Google\u2019s Physical Web. In this setting we are interested in capturing three contextual dimensions, namely who-where-when, and using these information to restrict access to shared resources. Formally, the framework consists of features types, an automata-based model of time-sensitive roles, context-aware permission rules, and an IoT infrastructure based on Eddystone Beacons for validating a policy against the current state of users

Movtour

A utilização de aplicações móveis para promoção do turismo é uma das tendências atuais. Para além da informação útil disponibilizada ao visitante, este tipo de aplicações pode também ser utilizada para recolher informação sobre os mesmos. Das várias aplicações móveis existentes para a vertente do turismo verificou-se que, ou são restritas a uma região ou monumentos específicos, ou fornecem uma espécie de páginas amarelas para várias cidades, estando por norma apenas disponíveis para cidades de grandes dimensões. De forma a oferecer ao utilizador uma experiência mais personalizada, algumas destas utilizam o sistema de GPS do dispositivo. No entanto, esta solução tem alguns inconvenientes, tais como o consumo excessivo de bateria, a falta de precisão ou até de cobertura entre e dentro de edifícios. Por outro lado, do que se pode verificar, não existe nenhuma aplicação que alerte e informe o visitante quando este se aproxima de um ponto de interesse. Este projeto tem como objetivo atacar as limitações identificadas, para tal propondo um sistema que permita ao turista receber automaticamente informação personalizada sobre os pontos de interesse que visita e ao mesmo tempo que forneça informação sobre as tendências dos visitantes. Este projeto consiste no desenvolvimento de um sistema para a gestão de pontos de interesse e recolha de informação sobre os visitantes, o MovTour. Para tal foi criado um backoffice, com a função de gerir e registar a informação turística, e uma aplicação móvel a ser utilizada pelo turista, que interage com beacons (pequenos sensores) colocados nos pontos de interesse, através de Bluetooth. Após encontrar um beacon, a aplicação móvel notifica o backoffice sobre a visita e apresenta informação relevante ao visitante. O backoffice encontra-se em funcionamento, estando alojado num servidor do Instituto Politécnico de Tomar. A aplicação móvel foi desenvolvida tanto para dispositivos Android como para Apple iOS, estando a versão Android já disponível no Google Play. Foram também iniciados testes de captura de sinais dos beacons no Convento de Cristo, em Tomar

Range Information Systems Management (RISM) Phase 1 Report

RISM investigated alternative approaches, technologies, and communication network architectures to facilitate building the Spaceports and Ranges of the future. RISM started by document most existing US ranges and their capabilities. In parallel, RISM obtained inputs from the following: 1) NASA and NASA-contractor engineers and managers, and; 2) Aerospace leaders from Government, Academia, and Industry, participating through the Space Based Range Distributed System Working Group (SBRDSWG), many of whom are also; 3) Members of the Advanced Range Technology Working Group (ARTWG) subgroups, and; 4) Members of the Advanced Spaceport Technology Working Group (ASTWG). These diverse inputs helped to envision advanced technologies for implementing future Ranges and Range systems that builds on today s cabled and wireless legacy infrastructures while seamlessly integrating both today s emerging and tomorrow s building-block communication techniques. The fundamental key is to envision a transition to a Space Based Range Distributed Subsystem. The enabling concept is to identify the specific needs of Range users that can be solved through applying emerging communication tec

Astronautics and aeronautics, 1972

Important events of the U. S. space program during 1972 are recorded in a chronology which encompasses all NASA, NASA related, and international cooperative efforts in aeronautics and astronautics. Personnel and budget concerns are documented, along with the major developments in aircraft research, manned space flight, and interplanetary exploration

Factors Associated with Quit Attempts and Smoking Cessation in Brazil: Findings from the International Tobacco Control Brazil Survey

Background:In Brazil, the treatment of tobacco dependence is available at no cost. This study aimed to identify factors associated with attempting to quit and of successful smoking cessation in a population-based sample of Brazilian smokers.Methods:Data came from the first two waves of the International Tobacco Control (ITC) Brazil Survey, conducted in 2009 and 2012/2013 in three cities: Rio de Janeiro, São Paulo, and Porto Alegre. Prospective cohort data were collected from 488 adults (≥18 years) who smoked at Wave 1 who were resurveyed at Wave 2. Crude and adjusted relative risks (RR) for two outcomes (making a quit attempt between Wave 1 and Wave 2 and successfully quitting by Wave 2) were estimated. Multivariable multilevel logistic regression models were used, whereby variables were added to the models in a series of blocks.Results:Nearly two-thirds (65.6%) of smokers attempted to quit between waves, and 23.4% had quit at Wave 2. Intention to quit smoking at Wave 1 was the only variable associated with attempt to quit by Wave 2 (OR=2.85; 95%CI 1.64-4.94; p\u3c 0.001). Smokers of higher socioeconomic status (ORhigh versus low=1.80; 95%CI 1.05-3.10; p=0.03) and lower nicotine dependence (ORlow HSI versus high HSI=1.94; 95%CI 1.10-3.43; p=0.02) were more likely to successfully quit. The presence of another adult smoker at home was negatively related to successful quitting (OR=0.50; 95%CI 0.26-0.94; p= 0.03).Conclusions:These results are generally consistent with prior research and have potential to inform governmental interventions to promote tobacco cessation, particularly among disadvantaged groups