Papers by Jose Antonio Gutierrez Suarez
Physical Review Letters, 2008
La Educación Ambiental a Distancia de profesoras pinareñas desde la tecnología e ducativa en comunidades rurales
... ó. n. oma de Madrid, 4. pág. 97-116, 1999. Solano, David. * : Comunicación y generación de co... more ... ó. n. oma de Madrid, 4. pág. 97-116, 1999. Solano, David. * : Comunicación y generación de conciencia ambiental. Artículo publicado en Tópicos de Educación Ambiental, MX 3(7): 52-57. SEMARNAT-UNAM, Junio 2001. Trellez, E. y C. Quiroz (1995). Formaci. ó. n. ...
BMC Genomics, 2006
Background The filamentous fungus Trichoderma harzianum is used as biological control agent of se... more Background The filamentous fungus Trichoderma harzianum is used as biological control agent of several plant-pathogenic fungi. In order to study the genome of this fungus, a functional genomics project called "TrichoEST" was developed to give insights into genes involved in biological control activities using an approach based on the generation of expressed sequence tags (ESTs). Results Eight different cDNA libraries from T. harzianum strain CECT 2413 were constructed. Different growth conditions involving mainly different nutrient conditions and/or stresses were used. We here present the analysis of the 8,710 ESTs generated. A total of 3,478 unique sequences were identified of which 81.4% had sequence similarity with GenBank entries, using the BLASTX algorithm. Using the Gene Ontology hierarchy, we performed the annotation of 51.1% of the unique sequences and compared its distribution among the gene libraries. Additionally, the InterProScan algorithm was used in order to further characterize the sequences. The identification of the putatively secreted proteins was also carried out. Later, based on the EST abundance, we examined the highly expressed genes and a hydrophobin was identified as the gene expressed at the highest level. We compared our collection of ESTs with the previous collections obtained from Trichoderma species and we also compared our sequence set with different complete eukaryotic genomes from several animals, plants and fungi. Accordingly, the presence of similar sequences in different kingdoms was also studied. Conclusion This EST collection and its annotation provide a significant resource for basic and applied research on T. harzianum, a fungus with a high biotechnological interest
Science, 2007
Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a... more Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above ~ 6x10^{19} electron volts and the positions of active galactic nuclei (AGN) lying within ~ 75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these cosmic rays with at least a 99% confidence level from a prescribed a priori test. The correlation we observed is compatible with the hypothesis that the highest energy particles originate from nearby extragalactic sources whose flux has not been substantially reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.
Technical reports on operations and features of the Pierre Auger Observatory, including ongoing a... more Technical reports on operations and features of the Pierre Auger Observatory, including ongoing and planned enhancements and the status of the future northern hemisphere portion of the Observatory. Contributions to the 31st International Cosmic Ray Conference, Lodz, Poland, July 2009.
Effect of standard nicotinamide in the prevention of type 1 diabetes in first degree relatives of persons with type 1 diabetes
Autoimmunity, 2006
Nicotinamide has been used with success to prevent type 1 diabetes in animal models and humans. T... more Nicotinamide has been used with success to prevent type 1 diabetes in animal models and humans. This vitamin B3 derivative has attracting effects on beta-cell protection and regeneration. To evaluate the effect of standard nicotinamide administration on type 1 diabetes prevention in first degree relatives of persons with type 1 diabetes as well as on the concentrations of islet-cell-related autoantibodies, insulin secretion and peripheral sensitivity. A randomized double-blind placebo controlled intervention trial was conducted in 40 first degree relatives of type 1 diabetic patients. Persistence of ICA (…
Clinical Microbiology and Infection, 2002
Objectives This work analyses the influence of immune status, serum human immunodeficiency virus ... more Objectives This work analyses the influence of immune status, serum human immunodeficiency virus (HIV) load and hepatitis C virus (HCV) genotypes on the probability of resolution of HCV infection in HIV-co-infected patients, as well as the evolution of HCV viremia after antiretroviral therapy.
fue un físico, filósofo,teólogo, inventor, alquimista y matemático inglés, autor de los Philosoph... more fue un físico, filósofo,teólogo, inventor, alquimista y matemático inglés, autor de los Philosophiae naturalis principia mathematica, más conocidos como los Principia, donde describió la ley de la gravitación universal y estableció las bases de la mecánica clásica mediante las leyes que llevan su nombre. Entre sus otros descubrimientos científicos destacan los trabajos sobre la naturaleza de la luz y la óptica (que se presentan principalmente en su obraOpticks) y el desarrollo del cálculo matemático. Newton comparte con Leibniz el crédito por el desarrollo del cálculo integral y diferencial, que utilizó para formular sus leyes de la física. También contribuyó en otras áreas de la matemática, desarrollando el teorema del binomio y las fórmulas de Newton-Cotes.
Physics Letters A, 2002
We investigate explicit functions that can produce truly random numbers. We use the analytical pr... more We investigate explicit functions that can produce truly random numbers. We use the analytical properties of the explicit functions to show that certain class of autonomous dynamical systems can generate random dynamics. This dynamics presents fundamental differences with the known chaotic systems. We present real physical systems that can produce this kind of random time-series. We report the results of real experiments with nonlinear circuits containing direct evidence for this new phenomenon. In particular, we show that a Josephson junction coupled to a chaotic circuit can generate unpredictable dynamics. Some applications are discussed.
Physica A-statistical Mechanics and Its Applications, 2002
We investigate functions of type Xn=P(Âz n ), where P(t) is a periodic function, Â and z are real... more We investigate functions of type Xn=P(Âz n ), where P(t) is a periodic function, Â and z are real parameters. We show that these functions produce truly random sequences. We prove that a class of autonomous dynamical systems, containing nonlinear terms described by periodic functions of the variables, can generate random dynamics. We generalize these results to dynamical systems with nonlinearities in the form of noninvertible functions. Several examples are studied in detail. We discuss how the complexity of the dynamics depends on the kind of nonlinearity. We present real physical systems that can produce random time-series. We report the results of real experiments using nonlinear circuits with noninvertible I-V characteristics. In particular, we show that a Josephson junction coupled to a chaotic circuit can generate unpredictable dynamics.
Physica D-nonlinear Phenomena, 2003
For a class of nonlinear chaotic maps, the exact solution can be written as X n = P (θk n ), wher... more For a class of nonlinear chaotic maps, the exact solution can be written as X n = P (θk n ), where P (t) is a periodic function, θ is a real parameter and k is an integer number. A generalization of these functions: X n = P (θz n ), where z is a real parameter, can be proved to produce truly random sequences. Using different functions P (t) we can obtain different distributions for the random sequences. Similar results can be obtained with functions of type X n = h[f (n)], where f (n) is a chaotic function and h(t) is a noninvertible function. We show that a dynamical system consisting of a chaotic map coupled to a map with a noninvertible nonlinearity can generate random dynamics. We present physical systems with this kind of behavior. We report the results of real experiments with nonlinear circuits and Josephson junctions. We show that these dynamical systems can produce a type of complexity that cannot be observed in common chaotic systems. We discuss applications of these phenomena in dynamics-based computation.
Uploads
Papers by Jose Antonio Gutierrez Suarez