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Background
Addressing childhood obesity in Latin America requires a package of multisectoral, evidence‐based policies that enable environments conducive to healthy lifestyles.
Objective
Identify and examine key elements to translating research into effective obesity policies in Latin America.
Methods
We examined obesity prevention policies through case studies developed with an expert in the...
The increasing prevalence of childhood obesity in Latin America poses a major public health challenge to the region. In response, many countries are implementing obesity prevention programmes aimed at modifying known risk factors. However, the limited scientific evidence inhibits the development and implementation of novel, effective interventions across the region. To address these gaps, the NIH...
In this paper we study an amplify-and-forward broadband relay network with cyclic delay diversity. Our main focus resides in reducing the channel estimation error by exploiting the cyclic shift and the properties of the fast Fourier transformation (FFT). Besides the improvement cyclic delay diversity is already delivering at almost no cost at the relays, we show that the bit error rate can be reduced...
In this paper, we present a novel centralized ARQ technique based on the lower bound on information combining. Contrary to conventional approaches where relays are selected according to the end-to-end quality of the link or decoding status of the relay, we select the minimum number of relays which suffice to allow the destination to successfully decode. Generally, it is believed that if a relay is...
Relay networks have attracted great attention in recent years due to their ability to extend the coverage of cellular systems. Their capacity is often analyzed by the max-flow min- cut theorem which provides an upper bound on the true capacity. However, the exact capacity is generally still unknown. This paper applies information combining to determine the achievable rate of a simple relay network...
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