Quasi-interpolation by means of filter-banks

We consider the problem of approximating a regular function f(t) from its samples, f(nT), taken in a uniform grid. Quasi-interpolation schemes approximate f(t) with a dilated version of a linear combination of shifted versions of a kernel ??(t), specifically fapprox T(t) = ??af[n]??(t/T - n), in a way that the polynomials of degree at most L-1 are recovered exactly. These approximation schemes give order L, i.e., the error is O(TL) where T is the sampling period. Recently, quasi-interpolation schemes using a discrete prefiltering of the samples f(nT) to obtain the coefficients af[n], have been proposed. They provide tight approximation with a low computational cost. In this work, we generalize considering rational filter banks to prefilter the samples, instead of a simple filter. This generalization provides a greater flexibility in the design of the approximation scheme. The upsampling and downsampling ratio r of the rational filter bank plays a significant role. When r = 1, the scheme has similar characteristics to those related to a simple filter. Approximation schemes corresponding to smaller ratios give less approximation quality, but, in return, they have less computational cost and involve less storage load in the syste

Creatine: Physiology and performance: The health effects of creatine in exercise and human performance

The purpose of this project is to review literature on creatine monohydrate (simply known as creatine/Cr) supplementation and its effects on exercise, human performance, and health. Included in this project is basic information relating to the biochemical and physiological effects of Cr, including possible side effects

Impacts of Crop Residue on Damage by Sugarcane Pests during the Tillering Phase in Argentina

One of the most important recent changes in sugarcane cultural practices in Tucumán, Argentina, is the adoption of the practice of green-cane harvesting, which involves harvesting the sugarcane crop in the absence of burning. The objective of this study was to assess the impact of the post-harvest crop residue (also sometimes known as "trash blanket") on Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae) and Pseudaletia unipuncta Haworth (Lepidoptera: Noctuidae) population dynamics in sugarcane. The study was conducted in ratoon crops for 3 growing seasons (2011, 2012, and 2013) and at 3 locations in the state of Tucumán, Argentina. The treatments consisted of rows with the crop residue burned and the crop residue retained. Removal of the crop residue by burning, compared with retention, resulted in significantly greater crop damage by E. lignosellus in all locations and years. In contrast, damage by P. unipuncta was observed exclusively on plots where crop residue was retained. Comparing the pest status of 2 insects, E. lignosellus seems to be more consistently deleterious to sugarcane yield than P. unipuncta, and chemical control of this species is not very effective. Therefore, leaving the crop residue in place seems to be the most appropriate crop management approach, although it is important also to monitor P. unipuncta populations in order to implement control should it be necessary.Fil: Isas, Marcos Gerardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Perez, Maria Lucia del Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Salvatore, Analia. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Gastaminza, Gerardo. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: Willink, Eduardo. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; ArgentinaFil: White, William. United States Department of Agriculture. Agriculture Research Service; Estados Unido

Carleson-type inequalitites in harmonically weighted Dirichlet spaces

Carleson measures for Harmonically Weighted Dirichlet Spaces are characterized. It is shown a version of a maximal inequality for these spaces. Also, Interpolating Sequences and Closed-Range Composition Operators are studied in this context

Value Investing and Size Effect in the South Korean Stock Market

There are indications that value investing strategies have been able to outperform the overall market in several countries across the globe. In this article, the specific case of South Korea is analyzed. It would appear that from a rigorous statistical point of view there are no strong evidence supporting the outperformance of value stocks versus growth stocks in South Korea, particularly when measured on a yearly basis. These results were consistent using both MSCI value and growth indexes as well as constructing portfolios using the P/E, P/B, cash flow per share and average 5-year sales growth. The statistical tests performed failed to reject for the majority of the years that the monthly returns come from distributions with different medians. The test yielding rather consistent results on a yearly basis but for large periods of time (decades) the results were more mixed, pointing in some cases to value investing outperforming over that very long time frame. It should be noted that the final value of the portfolios was rather different when using criteria, such as low P/E, typically associated with value stocks. The tests also failed to reject the hypothesis of different means for the monthly returns of small, medium and large companies

Identification of Systemic Sclerosis through Machine Learning Algorithms and Gene Expression

Systemic sclerosis (SSc) is an autoimmune, chronic disease that remains not well understood. It is believed that the cause of the illness is a combination of genetic and environmental factors. The evolution of the illness also greatly varies from patient to patient. A common complication of the illness, with an associated higher mortality, is interstitial lung disease (ILD). We present in this paper an algorithm (using machine learning techniques) that it is able to identify, with a 92.2% accuracy, patients suffering from ILD-SSc using gene expression data obtained from peripheral blood. The data were obtained from public sources (GEO accession GSE181228) and contains genetic data for 134 patients at an initial stage as well as at a follow up date (12 months later) for 98 of these patients. Additionally, there are 45 control (healthy) cases. The algorithm also identified 172 genes that might be involved in the illness. These 172 genes appeared in all the 20 most accurate classification models among a total of half a million models estimated. Their frequency might suggest that they are related to the illness to some degree. The proposed algorithm, besides differentiating between control and patients, was also able to distinguish among different variants of the illness (diffuse variants). This can have a significance from a treatment point of view. The different type of variants have a different associated prognosis

Aplicación web con estrategia lúdica para alumnos de tercer grado asignatura “Ciencias Naturales” unidad II parcial I, escuela “Carlos Fonseca Amador”, Matagalpa año 2013

La presente investigación, está basada en el desarrollo de una aplicación web informática lúdica en la asignatura Ciencias Naturales unidad II, para alumnos de tercer grado, escuela “Carlos Fonseca amador” Matagalpa, con el objetivo de evaluar el proceso enseñanza-aprendizaje de la asignatura Ciencias Naturales unidad II, la importancia de esta aplicación es que ayudara a reforzar los conocimientos trasmitidos por el docente a los niños; ya que contar con tecnología adecuada favorece el aprendizaje de los alumnos. En el proceso enseñanza-aprendizaje las técnicas y estrategias que utiliza el docente para impartir la clase son de manera tradicional como exposiciones, preguntas y participación de los alumnos; no se utiliza herramientas tecnológica para tener una clase alegre y llamativa. Para lograr el diseño de la aplicación con estrategias lúdicas fue de vital importancia conocer las dificultades en el proceso enseñanza-aprendizaje en la asignatura Ciencias Naturales, además estudiar el comportamiento de todos los alumnos de tercer grado mediante métodos como la observación y entrevista, al realizar este estudio se pudo determinar que existen algunas dificultades dentro del aula de clase como, dificultades económicas, técnicas, recursos humanos y, tecnológicas. Al finalizar la investigación se propone la implementación de la aplicación web informática lúdica para alumnos de tercer grado de la escuela “Carlos Fonseca Amador” Matagalpa, la cual vendrá a apoyar la labor del docente y a beneficiar a los estudiantes en el conocimiento de estudio

Trichogramma (Hymenoptera: Trichogrammatidae) Species, Egg Parasitoids of Diatraea saccharalis (Lepidoptera: Crambidae) on Sugarcane (Poales: Poaceae) in Argentina

The aim of this study was to identify egg parasitoids of Diatrea saccharalis F., sensu Guenée (Lepidoptera: Crambidae) in sugarcane in Tucumán, Argentina. We report a new host-parasitoid association of Trichogramma atopovirilia Oatman & Platner (Hymenoptera: Trichogrammatidae) attacking D. saccharalis and the first record of Trichogramma galloi Zucchi from Argentina. Additionally, Trichogramma pretiosum Riley was recorded in this survey.Fil: Isas, Marcos Gerardo. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Luft Albarracin, Erica Beatriz. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; ArgentinaFil: Perez, Maria Lucia del Pilar. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Salvatore, Analía. Gobierno de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial Obispo Colombres; Argentin