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Publicações

Publicações por Carlos Eduardo Tavares

2009

Integration of a suite of sensors in a wireless health sensor platform

Autores
Pepijn Van de Ven; Alan Bourke; Carlos Eduardo Tavares; Robert Feld; Artur Rocha; John Nelson

Publicação
IEEE SENSORS 2009 - IEEE Sensors Conference 2009, Christchurch, New Zealand

Abstract
In this paper we discuss the development and clinical evaluation of a wireless platform for health signs sensing. The sensors measure physical activity, ECG, blood oxygen saturation, temperature and respiratory rate. An important aspect of the approach is that the sensors are integrated into one waist-worn device. A mobile phone collects data from this device and uses data fusion in the scope of a decision support system to trigger additional measurements, classify health conditions or schedule future observations. In these decisions, the user's current physical activity plays an important role as the validity of many health signs measurements is strongly related to physical activity. Due to the integration of the sensors and the use of data fusion it is possible to accurately identify health risks and to react promptly. During clinical trials, for which proper ethical approval was obtained, the system was used by healthy elderly volunteers in Limerick (Ireland) and Ancona (Italy). Results of these trials are also discussed in this paper.

2020

A Dynamic Logic for QASM Programs

Autores
Tavares, C;

Publicação
Dynamic Logic. New Trends and Applications - Second International Workshop, DaLí 2019, Porto, Portugal, October 7-11, 2019, Proceedings

Abstract
We define a dynamic logic for QASM (Quantum Assembly) programming language, a language that requires the handling of quantum and probabilistic information. We provide a syntax and a model to this logic, providing a probabilistic semantics to the classical part. We exercise it with the quantum coin toss program. © 2020, Springer Nature Switzerland AG.

2020

Simulation of Nonradiative Energy Transfer in Photosynthetic Systems Using a Quantum Computer

Autores
Guimaraes, JD; Tavares, C; Barbosa, LS; Vasilevskiy, MI;

Publicação
Complexity

Abstract
Photosynthesis is an important and complex physical process in nature, whose comprehensive understanding would have many relevant industrial applications, for instance, in the field of energy production. In this paper, we propose a quantum algorithm for the simulation of the excitonic transport of energy, occurring in the first stage of the process of photosynthesis. The algorithm takes in account the quantum and environmental effects (pure dephasing), influencing the quantum transport. We performed quantum simulations of such phenomena, for a proof of concept scenario, in an actual quantum computer, IBM Q, of 5 qubits. We validate the results with the Haken-Ströbl model and discuss the influence of environmental parameters on the efficiency of the energy transport.