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This paper presents a fast and accurate automatic voice recognition algorithm. We use Mel frequency Cepstral Coefficient (MFCC) to extract the features from voice and Vector quantization technique to identify the speaker, this technique is usually used in data compression, it allows to model a probability functions by the distribution of different vectors, the results that we achieve were 100% of...
There are computational models such as Monte Carlo simulation, game-based computing theory, neural networks and genetic algorithms, in which pseudorandom numbers play an important role. These numbers must have some good statistical properties such as normal distribution, uncorrelated and a long period. In this paper a Pseudorandom Numbers Generator (PRNG) based on 2-dimensional cellular automata with...
The use of learning objects across multiple platforms and the creation of learning repositories that are used to direct access into the learning objects and the deployment has been generated a new need in applying information, they are considered as educational resources that can be employed in technology-support learning, just like the use of a chatterbot, with his own search engine to locate learning...
An algorithm for detection and quantification of fungiform papillae in tongue images is presented. This algorithm does not require any special dye to be used on the tongue. It is fast and accurate compared with traditional manual counting. The algorithm is a valuable tool for food science.
Free-space optical link is an alternative instrument to transmission of information in data rates up to tenths of gigabits per second. Although evolution of this technology has been proceeded for several years, many factors affecting propagation of optical beam still have not been suitable minimized. Therefore several mitigation techniques are tested nowadays. In this paper, influences of atmosphere...
Since mobile devices were conceived and commercialized, their market has grown exponentially, so as its problems related to secure data residing in them. Elliptic curve cryptography (ECC) is an approach to public key cryptography (PCK) based on the algebraic structure of elliptic curves over finite fields. It represents the most suitable choice for implementing cryptography in mobile devices since...
In this paper we present the results obtained to implement the Fading Mitigation Technique (FMT) by variable transmission rate (DRR) for a communication link through a multi-tap wideband channel model. The system is considered as a random process so that the data rate inside the mitigation algorithm is switching by the variable component with respect to time of the received symbols. The channel model...
This paper proposes the use of a multi-objective approach to discover regulatory sequences using genetic algorithms. Since regulatory sequences have different features, a multi-objective approach seems pertinent and a viable way. The variables to maximize with it are: similarity, length, support, and a weight matrix intended to achieve a guided search. We validated our proposal in a database of the...
The analysis of time duration between consecutive R waves of electrocardiogram (ECG) is a standard method to evaluate the variations in heart rate. The physiological literature reveals that blood glucose levels modulate the autonomic nervous system (ANS) activity and heart rate variability (HRV) is representative of the cardiovascular autonomic function. In the research described here, a pilot investigation...
We developed an application to transmit voice through the Internet for communication of mobile devices in real time. It is explained the way of configuring a server and the clients (mobile terminals) for voice transmission over IP. The server is in charge of the system administration and the establishment and control of the proper connections to the clients. The clients are provided with the necessary...
Sensor Networks have become an integral part of ubiquitous computing. However, their full integration with the ubiquitous computing paradigm is still an open problem due to the lack of integration with Internet protocols such as HTTP and SOAP, which enable the use of Web Services from remote clients. Additionally, these protocols do not address the requirements for wireless sensor networks, and current...
When somebody dies, her or his presence might still be hanging around others' lives on Social Networking Sites (SNS). Several factors might influence the way we perceive this digital presence after the death including personal and religious beliefs. In this work, we present results from a study aimed at examining the differences between the way we perceive an online profile before and after the owner...
In this paper, a DSP-Based of an oversampling adaptive noise canceller for background noise reduction using the Recursive Least Squares (RLS) algorithm on a Digital Signal Processor (DSP) is presented and its performance discussed. The implementation described seeks to improve the signal to background noise ratio for effective telephone communication in adverse non-stationary acoustic environments...
We report the results of applying several deconvolution methods to estimate fluorescence decay curves and fluorescence lifetimes. The methods are applied to time-resolved fluorescence signals measured with a homemade spectrofluorometer. We measured the fluorescence emitted by three substances with known lifetimes: fluoresceine (4.03 ns), rhodamine 6G (4.08 ns), and rhodamine B (1.68 ns). Also we measured...
In this paper we propose a new algorithm in order to reduce temporal complexity in Markov decision processes. Value iteration is a classical algorithm for solving them, but this algorithm and its variants are quite slow for discount factors close to one and their convergence properties depend to a great extent on a good state update order. It has been shown that improved topological value iteration...
The chaotic oscillator has become an important tool in the analysis of harmonic signals with low signal to noise ratio. On the other hand, traditionally, frequency modulated (FM) signals have always been studied through conventional techniques of time-frequency analysis. Recently, the Duffing oscillator has shown to be a powerful tool to detect frequencies for periodic signals because of its chaotic...
The aim of this work is the design and implementation of a DWT architecture FPGA-based platform for up to three dimensional signal processing. First, filter banks are designed using a distributed arithmetic technique. Then, we design controllers, interfaces and protocols that handle, transmit and sequence all the data during the computing process. Data is sent via USB to the FPGA and the user interface...
Rich Internet Applications (RIAs) Engineering is an emerging area of Software Engineering which lacks the development approaches and tools for support. The demand for RIAs is driven by the increase in the development of cloud-based applications. The aim of this paper is to present a process for source code generation of multi-device RIAs that complements the Phases Process for RIAs Development (PPRD)...
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