Roberto Araiza

Roberto Araiza
University of Texas at El Paso | UTEP

About

37
Publications
1,424
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
302
Citations

Publications

Publications (37)
Article
Full-text available
In this paper, we analyze the problem of prediction in physics from the computational viewpoint. We show that physical paradigms like Laplace determinism, statistical determinism, etc., can be naturally explained by this computational analysis. In our explanations, we use the notions of the Algorithmic Information Theory such as Kolmogorov complexi...
Article
Full-text available
Pseudoknots have been recognized to be an important type of RNA secondary structures responsible for many biological functions. PseudoBase, a widely used database of pseudoknot secondary structures developed at Leiden University, contains over 250 records of pseudoknots obtained in the past 25 years through crystallography, NMR, mutational experime...
Article
As ribonucleic acid (RNA) molecules play important roles in many biological processes including gene expression and regulation, their secondary structures have been the focus of many recent studies. Despite the computing power of supercomputers, computationally predicting secondary structures with thermodynamic methods is still not feasible when th...
Conference Paper
Full-text available
In this paper, we consider two seemingly unrelated problems: the hydrology problem of relation between groundwater and surface water, and a problem of identification of human gait in neuro-rehabilitation. It turns out that in both problems, we can efficiently use soft computing-motivated algorithms originally developed for image referencing.
Article
Full-text available
Many neurological diseases such as stroke, traumatic body injury, spinal cord injury drastically decrease the patient's ability to walk without physical assistance. To re-establish normal gait, patients undergo extensive rehabilitation. At present, rehabilitation requires gait assessment by highly qualified experienced clinicians. To make rehabilit...
Article
Most results related to discrete nonnegativity conservation principles (DNCP) for elliptic problems are limited to finite differences and lowest-order finite element methods (FEM). In this paper we show that a straightforward extension to higher-order finite element methods (hp-FEM) in the classical sense is not possible. We formulate a weaker DNCP...
Article
For many practical applications, it is important to solve the seismic inverse problem, i.e., to measure seismic travel times and reconstruct velocities at different depths from these data. The existing algorithms for solving the seismic inverse problem often take too long and/or produce un-physical results – because they do not take into account th...
Conference Paper
In many practical situations, in particular in many bioinformatics problems, the amount of required computations is so huge that the only way to perform these computations in reasonable time is to distribute them between multiple processors. The more processors we engage, the faster the resulting computations; thus, in addition to processor exclusi...
Conference Paper
Markov chains are an important tool for solving practical problems. In particular, Markov chains have been successfully applied in bioinformatics. Traditional statistical tools for processing Markov chains assume that we know the exact probabilities pij of a transition from the state i to the state j. In reality, we often only know these transition...
Conference Paper
Full-text available
Geospatial databases generally consist of measurements related to points (or pixels in the case of raster data), lines, and polygons. In recent years, the size and complexity of these databases have increased significantly and they often contain duplicate records, i.e., two or more close records representing the same measurement result. In this pap...
Article
Full-text available
In many real-life situations, we have several types of uncer-tainty: measurement uncertainty can lead to probabilistic and/or interval uncertainty, expert estimates come with interval and/or fuzzy uncer-tainty, etc. In many situations, in addition to measurement uncertainty, we have prior knowledge coming from prior data processing, prior knowl-edg...
Article
Processing different types of data is one of the main applications of computers, the application for which computers have been originally designed. The more data we need to process, the more computing power we need and thus, the more important it is to use (and design) faster algorithms for data processing. Even processing 1-D data often is very ti...
Article
Full-text available
In many engineering applications, we have to combine probabilistic and interval uncertainty. For example, in environmental analysis, we observe a pollution level x(t) in a lake at different moments of time t, and we would like to estimate standard statistical characteristics such as mean, variance, autocorrelation, correlation with other measuremen...
Conference Paper
Full-text available
In many real-life situations, we have several types of uncertainty: measurement uncertainty can lead to probabilistic and/or interval uncertainty, expert estimates come with interval and/or fuzzy uncertainty, etc. In many situations, in addition to measurement uncertainty, we have prior knowledge coming from prior data processing and/or prior knowl...
Conference Paper
The analysis of modern, parallelized applications, such as scientific modeling, is of interest to a variety of people within the computing community of the Department of Defense (DoD). Persons desiring insight into the performance of these large programs include application users, application programmers/developers, portfolio and center managers, a...
Conference Paper
As useful as performance counters are, the meaning of reported aggregate event counts is sometimes questionable. Questions arise due to unanticipated processor behavior, overhead associated with the interface, the granularity of the monitored code, hardware errors, and lack of standards w.r.t. event definitions. To explore these issues, we are cond...
Conference Paper
Full-text available
In this talk, we analyze how expert knowledge can be used in solving the seismic inverse problem. To determine the geophysical structure of a region, we measure seismic travel times and reconstruct velocities at different depths from this data. There are several algorithms for solving this inverse problem.
Conference Paper
Full-text available
Large scientific applications developed as recently as five to ten years ago are often at a disadvantage in current computing environments. Due to frequent acquisition decisions made for reasons such as priceperformance, in order to continue production runs it is often necessary to port large scientific applications to completely different architec...
Conference Paper
Full-text available
A natural way to test the quality of a pavement is to send signals with different frequencies through the pavement and compare the results with signals passing through an ideal pavement. For this comparison, we must determine how, for the corresponding mixture, the elasticity, E, depends on the frequency, f, in the range from 0.1 to 10<sup>5</sup>...
Article
In many engineering applications, we have to combine probabilistic and interval errors. For example, in environmental analysis, we observe a pollution level x(t) in a lake at different moments of time t, and we would like to estimate standard statistical characteristics such as mean, variance, autocorrelation, correlation with other measurements. I...
Article
A natural way to test the quality of a pavement is to send signals with different frequencies through the pavement and compare the results with the signals passing through an ideal pavement. For this comparison, we must determine how, for the corresponding mixture, the elasticity E depends on the frequency f in the range from 0.1 to 10 Hz. It is ve...
Article
Full-text available
In many practical situations, the measurement result z depends not only on the measured value x, but also on the parameters s describing the experiment's setting and on the values of some auxiliary quantities y; the dependence z = f(x;s;y) of z on x, s, and y is usually known. In the ideal case when we know the exact value of the auxiliary pa- rame...
Article
Full-text available
In many engineering applications, we have to combine probabilistic and interval errors. For example, in environmental analysis, we observe a pollution level x(t) in a lake at dierent moments of time t, and we would like to estimate stan- dard statistical characteristics such as mean, variance, autocorrelation, correlation with other measurements. I...
Conference Paper
Full-text available
In order to adequately process satellite and radar information, it is necessary to find the exact correspondence between different types of images and between these images and existing maps. In other words, we need to reference these images. Automatic methods exist for referencing satellite images. These methods are based on using a fast Fourier tr...
Article
Full-text available
In order to adequately process satellite and radar information, it is necessary to find the exact correspondence between different types of images and between these images and existing maps. In other words, we need to reference these images. Automatic methods exist for referencing satellite images. These methods are based on using a fast Fourier tr...
Article
Full-text available
In order to adequately process satellite and radar information, it is necessary to find the exact correspondence between different types of images and between these images and the existing maps. In other words, we need to reference these images. In this paper, we propose new methods for automatic referencing of satellite and radar images. Keywords...
Conference Paper
Full-text available
In order to adequately process satellite and radar information, it is necessary to find the exact correspondence between different types of images and between these images and the existing maps. In other words, we need to reference these images. In this paper, we propose new methods for automatic referencing of satellite and radar images
Article
To cover a certain area, it is often necessary to combine several satellite photos. To get a proper combination, we need to appropriately position and orient these photos relative to one another, i.e., mosaic these photos. With the new generation of multi-spectral satellites, for each area, we have several hundred images which correspond to differe...
Article
Full-text available
To determine the geophysical structure of a region, we measure seismic travel times and reconstruct velocities at diierent depths from this data. There are several algorithms for solving this inverse problem, but these algorithms do not tell us how accurate these reconstructions are. Traditional approach to accuracy estimation assumes that the mea-...
Article
Full-text available
In this paper, we analyze the problem of prediction in physics from the computational viewpoint. We show that physical paradigms like Laplace determinism, statistical determinism, etc., can be naturally explained by this computational analysis. In our explanations, we use the notions of the Algorithmic Information Theory such as Kolmogorov complexi...
Article
FFT-based techniques are actively used to register 2-D images, i.e., to flnd the shift, rotation, and scaling necessary to align one image with the other. It is desirable to extend these techniques to the problem of registering 3-D images. Registration of 3-D images is an important prob- lem in areas such as bioinformatics (e.g., in protein docking...
Article
Not all mathematical solutions to physical equations are physically meaningful: e.g., if we reverse all the molecular velocities in a breaking cup, we get pieces self-assembling into a cup. The resulting initial conditions are ``degenerate'': once we modify them, self-assembly stops. So, in a physical solution, the initial conditions must be ``non-...
Article
We live nowadays in an information age, where stockpiles of data are generated every second. Much of this data comes in the form of images, which must be analyzed in order to obtain useful information from them. The problem that we solve in this thesis comes from the field of satellite image processing. When capturing satellite images, we do not kn...

Network

Cited By