Gestión y generación del conocimiento mediante el uso de plataformas digitales de formación

Las empresas e instituciones se enfrentan a un nuevo entorno, cada vez más competitivo y globalizado que les exige proporcionar respuestas inmediatas, flexibles y personalizadas. Las plataformas digitales de formación han facilitado enormemente la atención inmediata y flexible del alumno, en un marco de dispersión geográfica y horaria. Sin embargo, existen grandes diferencias entre unas plataformas y otras, principalmente desde el punto de vista de la posibilidad de la interacción. La oferta de plataformas en el mercado es amplia y diversa, el futuro de esta modalidad formativa es prometedor, pero exige una implicación de los docentes desde el punto de vista metodológico

Actualización bibliográfica para la checklist de las unidades de vegetación de España y Portugal: datos preliminares

Se ha realizado una revisión bibliográfica exhaustiva de las clasificaciones fitosociológicas hasta el nivel básico de asociación de las comunidades vegetales en el marco geográfico de la península ibérica, islas Baleares, Canarias, Madeira y Azores. Para ello este trabajo presenta un estudio sobre la publicación efectiva -siguiendo las normas vigentes de la tercera edición (2000) del International Code of Phytosociological Nomenclature, (ICPN)- en el período de 1912-2001, año de publicación del compendio general publicado en el volumen 14 de Itinera Geobotanica. La metodología utilizada ha sido la recopilación, el análisis y la síntesis de las unidades publicadas en la literatura especializada en Geobotánica. Se han chequeado los artículos fitosociológicos que se publicaron en los catálogos fitosociológicos disponibles. Las unidades de vegetación aparecen agrupadas en nueve categorías principales con características fisionómicas, estructurales y ecológicas homogéneas y veinte categorías secundarias que incluyen todos los rangos principales y auxiliares desde la clase a la asociación. Partiendo de estos datos se pretende realizar un estudio estadístico con el fin de conocer los grupos de vegetación con mayor número de unidades publicadas, el período de tiempo en el que se hicieron mayor número de publicaciones y las novedades que se propusieron en el compendio

Oral squamous cell carcinoma of tongue: Histological risk assessment. A pilot study

Background: More than 90% of malignant tumors diagnosed in the oral cavity are Oral Squamous Cell Carcinomas (OSCC) whose preferred location is the tongue. Classically, this disease has affected men preferentially, although recent studies suggest that trends are changing and the proportion of women with OSCC is increasing. In addition, the prevalence of oral cancer is also determined by some risk factors as alcohol consumption and tobacco. Currently, the Tumor, Node, Metastasis (TNM) classification is employed to defined tumor stage and based on this guide specific treatments are established. However, 5-year-survival does not exceed 50% of cases. The objective of this study is to determine whether a histological risk pattern indicative of higher recurrence might be present in T1-T2 tumors located in the anterior two thirds of the tongue. Material and Methods: Samples from 26 patients with OSCC were analyzed and histological risk pattern of recurrent and non-recurrent tumors were compared. We have analyzed histological variables described in Anneroth and Brandwein-Gensler classifications. Additionally, we have also examined both clinical variables such as age, sex or comorbidities, as well as habits such as tobacco or alcohol consumption. Results: We found that sex (male) and keratinization degree (high or moderate) are directly related with OSCC recurrence. In fact, free illness time is lower in men and higher in those cases with minimal or no keratinization. Conclusions: Based on the variables analyzed, it has not been possible to establish a histological risk pattern that, complementary to the TNM classification, could have a predictive role in these early-stage tongue carcinoma

Aurochs, genetics, indigenous people and colonists: apropos of the neolithization of Europe

Las analíticas genéticas realizadas sobre los uros (Bos primigenius) del yacimiento de Mendandia (Treviño), han ofrecido un resultado sorprendente: uno de los individuos pertenece al haplotypo T3, generalmente asociado a animales domésticos (Bos taurus). La datación de la muestra (7265 ± 70 BP; Ua 34366) es acorde con las otras conocidas de su nivel, el III-superior, incidiendo en la antigüedad de su Neolítico. El dato es la excusa para reflexionar sobre el proceso neolitizador y adentrarnos en el debate sobre el papel que pudiera corresponder a los indígenas y a los colonos. Para ello se valora la información más actual sobre genética de las poblaciones del principio del Holoceno, las medias promediadas de la extensión por Europa del nuevo modo de vida, así como otros indicios de neolitización prematura. Un compendio de razones que nos lleva a pensar que estamos frente a un fenómeno cultural muy complejo

Análisis de los problemas de probabilidad propuestos en las pruebas de acceso a la Universidad en Andalucía

El objetivo de este estudio fue, analizar el contenido de los problemas de probabilidad incluidos en las pruebas de Selectividad del Distrito Andaluz en la especialidad de Bachillerato de Ciencias Sociales. Se han analizado las pruebas realizadas desde 2003 a 2014. Los problemas de probabilidad se han resuelto y mediante un análisis semiótico se ha identificado los experimentos incluidos en el enunciado, el tipo de probabilidad pedida (simple, compuesta y condicional), los teoremas requeridos en su solución y los contextos utilizados en el problema. Un estudio descriptivo de la frecuencia de estas variables permite obtener conclusiones sobre la presencia y la dificultad de los mismos. Estos resultados pueden servir para la elaboración de pruebas futuras y preparar a los estudiantes que tienen que enfrentarse a las mismas

Adding Acanthodactylus beershebensis to the mtDNA phylogeny of the Acanthodactylus pardalis group

The phylogenetic affinities of Acanthodactylus beershebensis, a highly endangered lacertid lizard endemic to the Neguev (Israel), were assessed using mtDNA markers. Fragments of 12S and 16S rRNA were analysed and compared with already published sequences of Acanthodactylus. Results corroborate the taxonomic placement of A. beershebensis as a member of the A. pardalis group but place it within a polytomy at the same phylogenetic level as other (unnamed) African populations. This pattern of high but poorly structured genetic diversity, previously observed for other Acanthodactylus complexes, has been suggested to derive from the climatic instability of North Africa and the Middle East during the humid and dry periods of the Pleistocene as well as dune migrations. In conservation terms, if A. beershebensis is to be prioritised, then other populations of the A. pardalis group inhabiting North Africa would deserve a similar status, making their species definition urgent. These results highlight the need for considering phylogeny when establishing conservation priorities.publishe

Uncovering the adult morphology of the forearm bones from the Sima de los Huesos Site in Atapuerca (Spain), with comments on biomechanical features

[EN] The forearm skeleton is composed of two bones: the radius and the ulna. This is closely related to manipulative movements. The ulna is part of the elbow joint, whereas the radius and ulna together with the scaphoid and lunate bones, form the wrist joints. Thus, morphofunctional analysis of the adult Sima de los Huesos (SH) forearm bones, provides clues about manipulative activities in one Pleistocene population. From 1976 to the present, over 7000 human fossils have been recovered from the SH site. The radial sample comprised 98 labeled fragments, of which 49 belonged to adult individuals, representing at least 7 individuals. The ulnar sample included 31 labeled adult fossils representing at least nine individuals. In this study, we describe the SH radii and ulnae and analyze their functional implications for manipulative and forearm movements. We confirmed that the SH radii are long and curved, with variations in robusticity and radial tuberosity orientation. The SH ulnae are characterized by an anteriorly oriented trochlear notch, a massive olecranon process, an obliquely oriented radial notch, a blunt and short supinator crest, a gracile and curved diaphysis, and a round and anteriorly oriented pronator crests. In general, they exhibit Neanderthal morphology. The SH collection provides a unique opportunity to conduct morphological analyses of these bones in the Middle Pleistocene population.SIPublicación en abierto financiada por el Consorcio de Bibliotecas Universitarias de Castilla y León (BUCLE), con cargo al Programa Operativo 2014ES16RFOP009 FEDER 2014-2020 DE CASTILLA Y LEÓN, Actuación:20007-CL - Apoyo Consorcio BUCL

Versatility of nasolabial flaps in oral cavity reconstructions

Objectives: Describe the techniques involved and the results obtained witn nasolabial flaps in small and medium- sized defects of the oral cavity. The procedure is an easy resconstructive option with a high success rate and with very good aesthetic and functional outcomes. Study Design: A retrospective analysis of 16 nasolabial flap reconstructions in 15 oncological patients with oral cavity defects undergoing single-stage surgical interventions. We evaluate the tumor type, its location, size, the resective and reconstructive techniques involved, as well as any complications. Results: Out of 15 patients, 9 were male and 6 female, with ages ranging from 60-85 years. The primary tumor was located in the mandibular or maxillary gingiva in 7 patients, the lateral margin of the tongue in 5, the floor of the mouth in 3 and the mandibular symphysis in a single patient. The tumors were of a small to medium size. All patients underwent intraoral resections. In most cases, a cervical dissection was performed. All flaps were completed as single-stage surgical interventions, with 14 unilateral and 2 bilateral procedures. Five patients had received radiotherapy treatment for previous tumors. During the follow up period, which ranged from 4 months to 8 years, only one patient required their flap to be thinned, there were two incidents of surgical wound dehiscence, two hematomas and one orocutaneous fistula, none of which affected the survival of the flap. Conclusions: The nasolabial flap proves highly versatile in oral cavity reconstructions, coupled with a minimal morbidity of the donor region and good aesthetic and functional results. Its high vascularity allows for cervical dissections to be carried out or even for radiotherapy to be administered prior to it. It is straightforward, safe, and carrying it out as a single-stage intervention makes it the ideal surgical option for small to medium intraoral defects in edentulous patients with other comorbidities

Design and Implementation of a Test-Bench for Efficiency Measurement of Domestic Induction Heating Appliances

The operation of a domestic induction cooktop is based on the wireless energy transfer from the inductor to the pot. In such systems, the induction efficiency is defined as the ratio between the power delivered to the pot and the consumed power from the supplying converter. The non-transferred power is dissipated in the inductor, raising its temperature. Most efficiency-measuring methods are based on measuring the effective power (pot) and the total power (converter output). While the converter output power is directly measurable, the measurement of the power dissipation in the pot is usually a cause of inaccuracy. In this work, an alternative method to measure the system’s efficiency is proposed and implemented. The method is based on a pot with a reversible base to which the inductor is attached. In the standard configuration, the inductor is placed below the pot in such a way that the delivered power is used to boil water, and the power losses are dissipated to the air. When the pot base is flipped, the inductor is immersed into the water. In this case the losses in the inductor also contribute to heating up and boiling the water. The induction efficiency is calculated from the boiling rates in both configurations. A commercial inductor was tested under real working conditions with consistent results

Aneurysmal bone cyst of the mandible : case presentation and review of the literature

The aneurysmatic osseus cyst is a very infrequent bone lesion which in some occasions can be found at the craneofacial skeleton. Among all the cystic lesions that can be found at the mandible or the maxilla it is very rare. On the other side it is at the same time very interesting in terms of its differential diagnose with other types of maxillary bone lesions We present the case of a Caucasian male with an aneurysmatic cyst located at the right angle of the mandible and a review of the literature concerning the case. We have focused on the differential diagnose, mainly with the malignancies that can be found at this location. We also comment the therapeutic options clasically described for these kind of pathologies. In our patient, the surgical excision allowed a complete removal of the lesion and a posterior bone healing which made possible a implant-supported rehabilitation of the edentulous segment