A Parseval equation and a generalized finite Hankel transformation

summary:In this paper, we study the finite Hankel transformation on spaces of ge\-ne\-ra\-lized functions by developing a new procedure. We consider two Hankel type integral transformations $h_\mu$ and $h_\mu ^{\ast }$ connected by the Parseval equation $$\sum_{n=0}^{\infty }(h_\mu f)(n)(h_\mu ^{\ast } \varphi )(n)= \int_{0}^{1}f(x)\varphi (x)\, dx.$$ A space $S_\mu$ of functions and a space $L_\mu$ of complex sequences are introduced. $h_\mu ^{\ast }$ is an isomorphism from $S_\mu$ onto $L_\mu$ when $\mu \geq -\frac{1}{2}$. We propose to define the generalized finite Hankel transform $h'_\mu f$ of $f\in S'_\mu$ by $$ \langle (h'_\mu f), ((h_\mu ^{\ast } \varphi )(n))_{n=0}^{\infty }\rangle =\langle f,\varphi \rangle, \quad \text{for } \varphi \in S_\mu . $

Efecto de diferentes dosis de ametrina para control de coquito (Cyperus rotundus L.) en (Saccharum officinarum L.), AIPSA - Paramonga

El presente proyecto de investigación se llevó a cabo en la empresa Agroindustrial Paramonga, distrito de Paramonga, Provincia Barranca. Este proyecto tuvo como objetivo determinar el efecto de diferentes dosis de ametrina para el control de coquito en caña de azúcar y se pudo llegar a ello evaluando diferente dosis de Amepax 500 para el control de esta maleza perenne de este cultivo. El diseño que se empleo fue experimental en bloques completamente al azar (DBCA), con tres tratamientos y tres repeticiones. El campo experimental estuvo comprendido por un área de 531,25 m cada unidad experimental constituía 270 plantas, de los cuales se evaluaron 7 m 2, por el efecto bordo equivalente a 84 plantas de caña de azúcar. Los tratamientos en base al herbicida comercial Amepax 500 SC con ingrediente activo Ametrina fueron los siguientes; T1: (2,5 l/ha), T2: (3 l/ha), T3: (3,5 l/ha), T4: (4 l/ha). Al concluir el proyecto de investigación se determinó que el T4 (4,0 l/ha) de Amepax 500 tuvo un 70 % de control de la maleza en 15 días, mientras que el T2 (3,0 l/ha) dosis de ficha técnica del producto tuvo un 30 % de control, evidenciando que la dosis más alta es la más adecuada para el manejo de esta maleza en caña de azúcar.Tesi

Wavefront reconstruction of discontinuous phase objects from optical deflectometry

One of the challenges in phase measuring deflectometry is to retrieve the wavefront from objects that present discontinuities or non-differentiable gradient fields. Here, we propose the integration of such gradients fields based on an Lp-norm minimization problem. The solution of this problem results in a nonlinear partial differential equation, which can be solved with a fast and well-known numerical methods and doesn't depend on external parameters. Numerical reconstructions on both synthetic and experimental data are presented that demonstrate the capability of the proposed method

The Learning of Mind Mapping in Higher Education: A Comparative Study Between Universidad de Córdoba and Università di Roma-La Sapienza

In this paper we propose Mind Mapping as a technique which enhances holistic learning or whole brain learning in higher education. The dynamics performed in the learning and application of Mind Mapping is part of a participatory approach in the classroom as an element of the learning process. The research approach follows a quantitative methodology. The results reflect the views of students about the learning of Mind Mapping and its effectiveness in the study. The findings indicate that mental maps can be used with any type of material, making it a tool applicable to any university degree course

Peritonitis pelviana secundaria a malformación ginecológica en niña de 13 años. Presentación de un caso. Pelvic peritonitis secondary to a gynecological malformation in a 13 year-old girl. A case Report

Se presentó una paciente en edad pediátrica con antecedentes de salud anterior, con dolor abdominal de varios días de evolución, vómitos y fiebre elevada. Al examen físico nos encontramos un abdomen ligeramente distendido fundamentalmente en hipogastrio, doloroso a los golpes de tos, a la palpación se encuentra una marcada reacción peritoneal, diagnosticándose cuadro de abdomen agudo por cuadro peritoneal, se le realizó laparotomía exploradora de urgencia con diagnostico presuntivo de Apendicitis Aguda Perforada, se comprobó la presencia de una malformación ginecológica consistente en 2 úteros separados y una duplicación vaginal, se corrigió anomalía vaginal, la paciente fue dada de alta y después de un ciclo menstrual se evaluó evolucionando satisfactoriamente y sin complicaciones. DeCS: ANOMALIAS, PERITONITIS, PELVIS, GINECOLOGIA.ABSTRACT A patient was presented in pediatric age with history of previous health with abdominal pain during several days, vomiting and high fever. At physical examination, we found a slightly distended abdomen mainly in the hypogastric region painful when coughing. At palpation a significant peritoneal reaction is seen, diagnosing acute abdomen picture for peritoneal picture, an urgent exploring laparotomy was performed with presumptive diagnosis of perforated acute appendicitis, it was documented the presence of gynecological malformation consistent in two separate uteri and a vaginal duplication, the vaginal abnormality was corrected, the patient was discharged from hospital and after a menstrual cycle she was evaluated evolving adequately and uneventfully. DeCS: ABNORMALITIES, PERITONITIS, PELVIS, GYNECOLOGY

Use of Polycarbonate Waste as Aggregate in Recycled Gypsum Plasters

The use of gypsum as an indoor coating material for buildings is very extensive. This means that huge amounts of gypsum waste are generated daily worldwide. Therefore, many researchers in the last years have been working on the generation of new gypsum-related materials and products that incorporate recycled gypsum waste as a replacement for the commercial one. On the other hand, trying to reduce the large amounts of plastic generated globally each year, several studies have used different types of plastic waste as aggregates for the development of new construction and building materials. However, up to now, no previous studies have been found in which any type of plastic waste has been used as an aggregate in a recycled gypsum matrix. This paper presents a study in which two different types of waste were mixed for the development of new gypsum plasters: unheated gypsum waste from industrial plasterboard production (GPW) and polycarbonate (PC) waste from rejected compact discs (CDs) and digital versatile discs (DVDs). In this sense, the mechanical and thermal performance of plasters was evaluated. Finally, in order to evaluate the changes in the microstructure of the composites, a scanning electron microscopy (SEM) analysis was conducted. The results showed a good performance of the new composites when both types of waste were combined in the mixes. New lightweight eco-efficient plasters, completely recycled, with enhanced flexural strength (by 14.8%), compressive strength (by 26.8%), and thermal conductivity (42.8% less), compared to the reference material, were achieved