El yacimiento de Forat de Conqueta (Santa Linya, Lleida)

Al llarg d’aquest treball es presenten les característiques del jaciment de Forat de Conqueta. Es descriu la ubicació i les característiques geològiques del jaciment. Alhora s’adjunta la descripció de la morfologia de la cavitat.The aim of this paper is describe the main characteristics of Forart de Conqueta site. Location and geological characteristics of the deposit are described. In parallel we present the description of the morphology of the cave.A lo largo de este trabajo se presentan las características del yacimiento de Forat de Conqueta. Se describe la ubicación y las características geológicas del yacimiento. A la vez se adjunta la descripción de la morfología de la cavidad

Cluster analysis as a methodology within phylogenetic systematics to construct phylogenetic trees

All evolutionary studies of groups of species are based on the choice of appropriate characteristics for rebuilding their phylogenies (a phylogeny is the relationship or kinship among species in general and tries to reconstruct evolutionary relationships). A phylogenetic analysis reconstructs the evolutionary relationships between species, which descend from common ancestors and, furthermore, which are the genetic distances or separation times between these species [1]. To generate a phylogenetic analysis characters must have two requirements: independent of each other and be homologous, they have the same origin and the same function in all organisms Study The nature of those characters can be varied. Any source of validated and proved phylogenetic information can provide characters for an evolutionary study. Among the main evolutionary studies that have been developed stand two methods: The methods that have been taken as morphological characters base in which the presence of physical characteristics that describe the species is identified, and methods that have been based on molecular characteristics as the sequence DNA [2]. These characters are recorded in a data matrix within which, the state in which the character has been observed is represented with zero if it is absent or one if present respectively, and whether it is a character that may be present in the species with different values (multi-state) within the data matrix can be represented by the value corresponding to that character [2]. For this reason, homologous characters, once they have been validated and proven, may be taken as the basis for an evolutionary study because they provide enough information for the reconstruction of a phylogenetic tree

El Jaciment de Forat de Conqueta (Santa Linya, Lleida). Localització i característiques geològiques

Al llarg d'aquest treball es presenten les característiques del jaciment de Forat de Conqueta. Es descriu la ubicació i les característiques geològiques del jaciment. Alhora s'adjunta la descripció de la morfologia de la cavitat.A lo largo de este trabajo se presentan las características del yacimiento de Forat de Conqueta. Se describe la ubicación y las características geológicas del yacimiento. A la vez se adjunta la descripción de la morfología de la cavidad.The aim of this paper is describe the main characteristics of Forart de Conqueta site. Location and geological characteristics of the deposit are described. In parallel we present the description of the morphology of the cave

Real-Time Robot Vision on Low-Performance Computing Hardware

Small robots have numerous interesting applications in domains like industry, education, scientific research, and services. For most applications vision is important, however, the limitations of the computing hardware make this a challenging task. In this paper, we address the problem of real-time object recognition and propose the Fast Regions of Interest Search (FROIS) algorithm to quickly find the ROIs of the objects in small robots with low-performance hardware. Subsequently, we use two methods to analyze the ROIs. First, we develop a Convolutional Neural Network on a desktop and deploy it onto the low-performance hardware for object recognition. Second, we adopt the Histogram of Oriented Gradients descriptor and linear Support Vector Machines classifier and optimize the HOG component for faster speed. The experimental results show that the methods work well on our small robots with Raspberry Pi 3 embedded 1.2 GHz ARM CPUs to recognize the objects. Furthermore, we obtain valuable insights about the trade-offs between speed and accuracy

Elementos asociados a la efectividad de la gestión por resultados en Latinoamérica - una revisión sistemática: identificación de factores clave para el desempeño organizacional en la administración pública latinoamericana

El estudio tuvo como objetivo conocer los elementos asociados a la efectividad del uso de la gestión por resultados en Latinoamérica durante la última década, para lo cual, la investigación empleó una revisión sistemática, en conformidad a los lineamientos PRISMA - Preferred Reporting Items for Systematic reviews and Meta-Analyses. Asimismo, en el proceso se seleccionaron, organizaron y analizaron dieciocho (18) artículos científicos obtenidos de las bases de datos Scopus, Web of Science y SciELO, escogidos de acuerdo a criterios de elegibilidad preestablecidos:  a) estudios en español, inglés y portugués, b) documentos cuyo tiempo de publicación estuvo comprendido en la última década (2012-2022), c) investigaciones enmarcadas en el contexto latinoamericano y d) artículos de revista. Dentro de los resultados encontrados, se pudo establecer tres líneas temáticas a partir de la literatura revisada: “factores asociados a la efectividad de la gestión por resultados”, “Escenarios socio institucionales” y “actores sociales”. Se concluye que la planificación estratégica, la comunicación estratégica, las sinergias inter e intrainstitucionales, la participación comunitaria, las capacidades gerenciales de los gestores públicos, la cultura de gestión, se constituyen como factores que inciden en la efectividad de la gestión orientada a resultados en Latinoamérica

Phosphatidylcholine-coated iron oxide nanomicelles for in vivo prolonged circulation time with an antibiofouling protein corona

We report the synthesis of micellar phosphatidylcholine-coated superparamagnetic iron oxide nanoparticles as a new long circulation contrast agents for magnetic resonance imaging. Oleic acid-coated Fe3 O4 nanoparticles were first prepared through thermal degradation and then encapsulated into small clusters with a phosphatidylcholine coating to obtain hydrophilic nanomicelles. A thorough characterization confirmed the chemical nature of the coating and the excellent colloidal stability of these nanomicelles in aqueous media. Magnetization and relaxivity properties proved their suitability as magnetic resonance imaging (MRI) contrast agent and in vitro cell viability data showed low toxicity. Vascular lifetime and elimination kinetics in the liver were assessed by blood relaxometry and by in vivo MRI in rats and compared with "control" particles prepared with a polyethylene glycol derivative. These micellar particles had a lifetime in blood of more than 10 h, much longer than the control nanoparticles (≈2 h), which is remarkable considering that the coating molecule is a small biocompatible zwitterionic phospholipid. The protein corona was characterized after incubation with rat serum at different times by high-throughput proteomics, showing a higher proportion of bound apolipoproteins and other dysopsonins for the phosphatidylcholine particles. The antibiofouling properties of this corona and its resistance to the adsorption of proteins corroborate the observed enhanced stability and prolonged systemic circulation.This study is supported by a grant from FP7 Marie Curie, Pulmonary imaging network (PINET), by Fundacio La Maratode TV3 (70/C/2012) and by a grant from the Comunidad de Madrid (S2010/BMD-2326, Inmunothercan-CM) and by Spanish Economy Ministry (MAT2013-47303-P). We thank E. Urones (Centro Nacional de Microscopia de la Universidad Complutense de Madrid) for the transmission electronic microscopy imaging; P. Morales (Instituto de Ciencia de Materiales de la Universidad Autonoma de Madrid) for the thermogravimetric and magnetization analysis and B. Salinas (Fundacion Centro Nacional de Investigaciones Cardiovasculares and CIBER de Enfermedades Respiratorias) for the TEM picture of oleic acid coated Fe3 O4. The authors declare no competing financial interests.S

Evaluación del nivel de usabilidad basado en la NTP-ISO/IEC 9126 de un producto software generado por una herramienta para el modelado de procesos de negocio

La calidad del software es un elemento importante que garantiza que el software producido pueda cumplir con los requisitos del cliente, por esta razón, se han creado varias normas para medir dicha calidad, entre las cuales destaca la ISO/IEC 9126, la misma que mide, entre varias características, la usabilidad del producto, no siendo ajenas los productos software utilizados en las gestiones administrativas de las instituciones educativas. Por esta razón, se asumió como objetivo general, la evaluación del nivel de usabilidad basado en la NTP-ISO/IEC 9126 de un producto de software generado por una herramienta BPM. Para llevar a cabo dicho objetivo, primeramente, se seleccionó la herramienta BPM con mejores prestaciones para el desarrollo de un producto software; luego, se construyó un Sistema de Gestión de Pagos y Pensiones para una institución educativa caso de estudio; posteriormente se seleccionaron los atributos de la usabilidad a partir de NTP-ISO/IEC 9126 a utilizar, y; finalmente se midió el nivel de usabilidad considerando diez (10) usuarios a quienes se les capacitó y brindó un manual de usuario de dicho producto software y a quienes también se les encuestó. Los resultados obtenidos revelaron que, el nivel de usabilidad basado en la NTPISO/IEC 9126 del Sistema de Gestión de Pagos y Pensiones para la I.E.P. El Buen Pastor, considerando las cinco sub características de la usabilidad, obtuvo un consolidado de 89.2% de usabilidad. Se concluyó que, dicho producto software se encontraba en un “Nivel Excelente” de usabilidad lo cual se interpretó como un software “Usable”.TesisInfraestructura, Tecnología y Medio Ambient

TIO2 – Catalysts dopped or impregnated with Pt on hydrogen production via water disociation using heterogeneous photocatalysis

Alternative energies among them, hydrogen production via water dissociation using heterogeneous photocatalysis offers special promise [1]. Currently TiO2 is the most widely used photocatalyst. In the present study, experiments of hydrogen production via water splitting were developed using a Photo CREC Water II Reactor, with a specially adapted with H2 collector tank [2]. Ethanol 2 vol.% was employed as a renewable hole (h+) scavenger. TiO2 was doped with Pt using different loadings of Pt. The following methodologies were used: incipient impregnation, wetness impregnation and sol-gel. The prepared photo catalysts were characterized by BET, UV-Vis-diffuse reflectance, X-ray diffraction (XRD). The near UV lamp employed was characterized with a spectrophotoradiometer. The semiconductor prepared with gol gel displayed the highest specific superficial area (125 54 m2/g) and a reduced band gap (2.7 eV versus the 3.2 eV for DP25). The quantum yield reactor efficiency (QY) for hydrogen production was calculated, using QY=[dNi/dt]/Pa x 100. In all the cases, at pH = 4, the hydrogen profiles were linear. and produced with a 1.7% Pt loading and a 17% QY. QYs were constant throughout the experiment, as a result of the zero order hydrogen formation. Please click Additional Files below to see the full abstract

Efectos económicos y sociales del proyecto mejoramiento carretera Santo Tomas – Colquemarca, 2021

La presente investigación tuvo como objetivo primordial Analizar los efectos económicos y sociales que ha generado el proyecto mejoramiento carretera Santo Tomas – Colquemarca; en cuanto a la metodología es de alcance y enfoque cuantitativo, diseño experimental utilizando el método hipotético deductivo, con una población igual a 1752 habitantes para el grupo experimental y 1489 habitantes para el grupo de control con una muestra de 273 para el grupo experimental y 265 habitantes para el grupo de control a quienes se les aplico la encuesta como técnica de recolección de datos y al cuestionario como herramienta de recopilación de datos es así que se llegó a las siguientes conclusiones: i) El mejoramiento de la carretera Santo Tomas – Colquemarca, mejoró las actividades económicas, debido a que antes del proyecto las actividades económicas de la población afectada se concentraban en agricultura y ganadería, mientras que después del proyecto, se logró diversificar a otros sectores y ii) El mejoramiento carretera Santo Tomas – Colquemarca, permitió que la población del área de influencia acceda a los servicios de salud, entre otros. Optimizando de esta forma las condiciones de vida de los hogares

The impact of climate change on mosquito-borne diseases in Africa.

Despite being one of the continents with the least greenhouse gas emissions, no continent is being struck as severely by climate change (CC) as Africa. Mosquito-borne diseases (MBD) cause major human diseases in this continent. Current knowledge suggests that MBD range could expand dramatically in response to CC. This study aimed at assessing the relationship between CC and MBD in Africa. Methods For this purpose, a systematic peer review was carried out, considering all articles indexed in PubMed, Scopus, Embase and CENTRAL. Search terms referring to MBD, CC and environmental factors were screened in title, abstract and keywords.Results A total of twenty-nine studies were included, most of them on malaria (61%), being Anopheles spp. (61%) the most commonly analyzed vector, mainly in Eastern Africa (48%). Seventy-nine percent of these studies were based on predictive models. Seventy-two percent of the reviewed studies considered that CC impacts on MBD epidemiology. MBD prevalence will increase according to 69% of the studies while 17% predicted a decrease. MBD expansion throughout the continent was also predicted. Most studies showed a positive relationship between observed or predicted results and CC. However, there was a great heterogeneity in methodologies and a tendency to reductionism, not integrating other variables that interact with both the environment and MBD. In addition, most results have not yet been tested. A global health approach is desirable in this kind of research. Nevertheless, we cannot wait for science to approve something that needs to be addressed now to avoid greater effects in the future.S