This paper contends to be the first to report the experimental observation of up to 28 orders of parametric resonance, which has thus far only been envisioned in the theoretical realm. While theory has long predicted the onset of n orders of parametric resonance, previously reported experimental observations have been limited up to about the first 5 orders. This is due to the rapid narrowing na...

There are parametric and non-parametric methods for adaptive Hammerstein system identification. The most commonly used method is the non-parametric. In reality, the linear subsystem of a Hammerstein system is not of finite impulse response and nonparametric adaptive algorithms require large matrices and therefore increase computational complexity. The objectives of this paper are to identify th...

Speech intelligibility of two types of vocoders was measured using the modified rhyme test. One type of vocoder, a continuous variable slope delta (CVSD), was a waveform encoder. The other type, an advanced multi-band excitation (AMBE), was a parametric encoder. In the first experiment, clear speech was processed through the vocoders. Intelligibility was measured in a control condition, i.e. wi...

Semi-supervised learning plays an important role in the recent literature on machine learning and data mining and the developed semisupervised learning techniques have led to many data mining applications in recent years. This paper addresses the semi-supervised learning problem by developing a semiparametric regularization based approach, which attempts to discover the marginal distribution of...

Article history: Received 29 July 2010 Received in revised form 2 May 2012 Accepted 4 July 2012 Available online xxxx A number of socio-economic factors influence broadband diffusion and are assumed to be responsible for the different levels of adoption among countries. Most of the approaches met in literature do not take into account the different stages of the diffusion process and they are p...

The growth of organic farming practices in the last few decades is continuing to stimulate the international debate about this alternative food market. As a p art of a PhD project r esearch about embeddedness in Alternative Food Networks (AFNs), this paper focuses on the promotional aspects of organic farms websites from the Madrid region. As a theoretical tool, some knowledge categories drawn ...

Natural systems harbor complex interactions that are fundamental parts of ecology and evolution. These interactions challenge our inclinations and training to seek the simplest explanations of patterns in nature. Not least is the likelihood that some complex processes might be missed when their patterns look similar to predictions for simpler mechanisms. Along these lines, theory and empirical ...

A study was carried out over a two year period (2009/2010 and 2012/2013) on an experimental farm in the Alentejo region (Beja), in southern Portugal where rainfed malt barley (Hordeum distichum L.) is sown at the end of autumn or beginning of winter (November–December). The aim of this experiment was to study the efficiency of the herbicide iodosulfuron-methyl-sodium to control post-emergence b...

Modeling of nature’s complexity is among the outstanding challenges we are faced with in the geophysical sciences. Although many ideas have been proposed throughout the years, the most common approaches, being based on notions related to chance, turn out to be insufficient to study, on an individual basis, the vast variety of patterns seen in nature. To this end, a novel deterministic fractal g...

The six articulatory parameters of a three-dimensional tongue model were adjusted to replicate linguopalatal contact patterns measured with Electropalatography (EPG). The tongue model is based on artificially sustained articulations measured with MRI and the EPG data provides one possibility to tune the parameters to dynamic speech. A 3D model was generated of the palate and the electrode distr...