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On the covariance of teleparallel gravity theories
The basics of teleparallel gravity and its extensions are reviewed with particular emphasis on the problem of the Lorentz-breaking choice of connection in pure-tetrad versions of the theories. VariExpand
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A note on covariant conservation of energy–momentum in modified gravities
An explicit proof of the vanishing of the covariant divergence of the energy–momentum tensor in modified theories of gravity is presented. The gravitational action is written in arbitrary dimensionsExpand
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Matter power spectrum in f(R) gravity
Modified gravity can be considered as an alternative to dark energy. In a generalized theory of gravity, the Universe may accelerate while containing only baryonic and dark matter. We study, inExpand
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An integrable geometrical foundation of gravity
In a talk at the conference Geometrical Foundations of Gravity at Tartu, 2017, it was suggested that the affine spacetime connection could be associated with purely fictitious forces. This leads toExpand
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An Analog Viterbi Decoder Array for DS-UWB Receiver
TLDR
In this paper, we present an analog Viterbi decoder structure suitable for direct sequence UWB applications. Expand
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Generalized quadratic curvature, non-local infrared modifications of gravity and Newtonian potentials
Metric theories of gravity are studied, beginning with a general action that is quadratic in curvature and allows infinite inverse powers of the d'Alembertian operator, resulting in infraredExpand
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Cosmological perturbations in the Palatini formulation of modified gravity
Cosmology in extended theories of gravity is considered assuming the Palatini variational principle, for which the metric and connection are independent variables. The field equations are derived toExpand
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Dynamics of nonlocal cosmology
Nonlocal quantum corrections to gravity have been recently proposed as a possible solution to the cosmological fine-tuning problems. We study the dynamics of a class of nonlocal actions defined byExpand
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An Analog DS-UWB receiver
In this paper, we propose a direct-conversion direct-sequence inductorless CMOS receiver for pulse-based UWB communications using a high-speed analog Viterbi decoder. The circuit system architectureExpand
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Mixed-signal Viterbi decoder for a MB-OFDM receiver
TLDR
This paper presents a mixed-signal Viterbi decoder, which is suitable for a MB-OFDM UWB receiver. Expand
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