Risk management in megaprojects.

Despite its high relevance to the success of megaprojects, risk management remains one of the least developed research issues. Risk management is a process composed of several phases. This paper is focused on the first of these phases: risk identification. Our purpose is to establish the state of the art in risk management in megaprojects, systematize the risks studied in the literature, as well as to identify potential areas of further research. To this end, a systematic review is carried out. Academic journals and conference papers published from 2000 onwards in main databases (WoK, Scopus and ABI) have been examined. A qualitative analysis has been performed by using ATLAS.ti together with a checklist. To the best of the authors’ knowledge, no previous systematic revision of papers on risk management in megaprojects has ever been carried out, although certain authors have emphasized its importance. The contribution of this research includes: a bibliometric analysis of the papers that focus on risk management in megaprojects; a systematization and classification of the risks; tw†o matrices comprised of the proposed risk categorization, first in relation to the sector studied, and second related with the different stakeholders; and an identification of gaps in the research in risk management in megaprojects. The systematization of the risks helps managers towards their identification within the megaproject, and to follow the subsequent steps in the risk management process. Moreover, the matrix developed on the transfer of risks can enable managers to analyse who would be the best partner to support each risk. Furthermore, from an academic point of view, potential areas for future lines of research are presented

Wild edible plants as potential antioxidant or nutritional supplements for beverages minimally processed

Wild edible plants (WEP) with high antioxidant capacity, Rosa canina fruits, Quercus ballota acorns and Sanguisorba minor (young leaves and stems), were added to orange and kiwifruit juices for increase the nutritional properties. The addition of WEP to orange juice (OJ) and kiwifruit cremogenate (KC) does not affect, or it can even improve, some parameters of consumer's acceptance, although the mixtures increasing sweetness and intensifying the matrix colour without changing the tone are the best valued. The beverages minimally processed with higher TSS were the matrices fortified with Q. ballota, the same that were considered sweetest by the judges. The addition of WEP to OJ did not significantly change the levels of vitamin C (ascorbic acid plus dehydroascorbic acid). The addition of R. canina and S. minor increased the content of phenolic compounds and antioxidant capacity in both matrices (OJ and KC) in more than 30%. Beverages with a high interest for consumers and with high antioxidant properties have been obtained

La Escuela Ciencias de la Salud de la Universidad del Rosario, Bogotá DC, Colombia y Méderi: retos y oportunidades

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Breves notas sobre las publicaciones periódicas de nuestra Facultad de Medicina

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Upper Ordovician cryptostomatid bryozoans and microfossils from the Don Braulio Formation, Eastern Precordillera, Argentina

En la clásica sección de la Quebrada de Don Braulio, en la Precordillera Oriental de la Provincia de San Juan, afora la Formación Don Braulio de edad hirnantiana. Fragmentos de colonias de Bryozoos,algunas espículas de esponjas mal conservadas y una placa de crinoideos, fueron recuperados de los sedimentos silicoclásticos de esta formación. Los restos de las colonias de briozoos se caracterizan por su hábito de crecimiento erecto, su diámetro pequeño y por la presencia de estriaciones longitudinales. Estos fragmentos tienen una pobre preservación, sin embrago los mismos han sido comparados con el género Nematopora perteneciente a la familia Arthrostylidae (suborden Rhobdomesina, orden Cryptostomata), que tuvo numerosos representantes durante el Ordovícico. Escasas y fragmentadas espículas de esponja hexactinéllidas y otros tipos de microfósiles también han sido recuperados de los depósitos post-glaciales de la Formación Don Braulio.In the classical section of the Don Braulio Creek at the Villicum Range, Eastern Precordillera of San Juan Province, crops out the siliciclastic Don Braulio Formation of Hirnantian age. Fragments of bryozoan colonies, few poorly preserved sponge spicules and a crinoidal plate, were recovered from these shelf sedi-ments. The bryozoan colonies remains are characterized by its erect growth habit, its small diameter, and for showing clear longitudinal striations. These fragments have a poor preservation, but they have been compared with the genus Nematopora belonging to the Arthrostylidae family (Rhobdomesina suborder, Cryptostomata order), that had numerous representatives during the Ordovician. Very scarce and highly fragmented sponge spicules are classifed as hexactins. These microfossils have been recovered in the post-glacial deposits from the Don Braulio section at the Villicum range.Fil: Jiménez Sánchez, Andrea. University of West Bohemia; República ChecaFil: Beresi, Matilde Sylvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; ArgentinaFil: Mestre García, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Investigaciones Mineras; ArgentinaFil: Heredia, Susana Emma. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Investigaciones Mineras; Argentin

Conceptions underlying the construction of knowledge: A model from history teaching

En este artículo, y atendiendo a la escasez de estudios en el ámbito educativo, delimitamos como objetivo configurar un modelo de concep­ciones subyacentes a la dimensión metodológica de la construcción del conocimiento histórico. Para ello, en primer lugar, delimitamos las ope­raciones del método histórico, que constituyen las variables empíricas, considerando, en segun­do lugar, las aportaciones desde la didáctica, para definir los constructos. El modelo inicial está constituido por dos dimensiones: operaciones estructurantes, definidas como operaciones im­prescindibles para proceder acorde con el méto­do histórico, lo que implica un pensamiento me­tódico; y operaciones alternativas, que aportan divergencia y multiplicidad, acorde con una his­toria vanguardista. Para la confirmación del mo­delo, diseñamos un instrumento objetivo, de 44 ítems, realizando un estudio con 222 sujetos, de entre 13 y 18 años. La información fue analizada mediante diferentes procedimientos (correlacio­nes de Pearson, CFA, estadística descriptiva…), utilizando los programas estadísticos SPSS y MPlus. Entre otros resultados interesantes, la confirmación del modelo propuesto implica la ve­rificación de una estructura establecida según la naturaleza de las operaciones, confirmando las dimensiones propuestas. Esta configuración del modelo presenta implicaciones para el ámbito investigador, pero también consecuencias direc­tas para el trabajo en el aula.The aim of this article is, given the scarcity of studies in the field of education, to establish a model of the concepts underlying the methodological dimension of the construction of historical knowledge. To do so, we start by defining the operations of the historical method, which make up the empirical variables. We then consider the contributions from didactics to define the constructs. The initial model comprises two dimensions: structuring operations, which are defined as the operations essential for proceeding in accordance with the historical method, which entails methodical thought; and alternative operations, which provide divergence and multiplicity, in accordance with an avant-garde history. To verify the model, we designed an objective instrument with 44 items and carried out a study with 222 subjects, aged between 13 and 18. The data were analysed using a variety of procedures (Pearson correlations, CFA, descriptive statistics, etc.), using SPSS and MPlus statistical software. Among other interesting results, verifying the proposed model involves verifying a structure established in accordance with the nature of the operations, confirming the proposed dimensions. This configuration of the model has implications for the field of research as well as direct consequences for classroom practice.Este trabajo se realizó en el marco del contrato predoctoral (19811/FPI/15) de la Fundación Séneca, Agencia de Ciencia y Tecnología de la Región de Murcia, del que disfrutó la primera autora, y del proyecto «La evaluación de las competencias y el desarrollo de capacidades cognitivas sobre historia en Educación Secundaria Obligatoria» (EDU2015-65621-C3-2-R)