4,851 research outputs found
Teodora: cento volti e nessuno
La raffigurazione Teodora nel mosaico di San Vitale a Ravenna ha contribuito in misura determinante alla costruzione della fama dell’imperatrice, che ha segnato profondamente l’immaginario visivo per secoli, al punto da essere erroneamente spesso ricordato come l’unico ritratto a lei contemporaneo. Ieratico e idealizzato, questo ritratto in realtà ci dice ben poco delle sue reali fattezze, tanto che nei secoli successivi molti ritratti semplicemente privi di indicazione sul soggetto hanno potuto essere associati a Teodora.Empress Theodora portrayed in the famous mosaic of San Vitale in Ravenna has contributed to establish her position in the following visual imaginary and has been quoted in many works of art, to the extent of having been considered her only depiction realized in her epoch. But it is an official and idealized portrait, which gives us very few information about Theodora’s actual look, so that many other works of art, in the following centuries, have been considered as her portraits simply because there were no information about the persons they actually represented
A preliminary approach to the study of the patronage of Constantine and Helena in the New Rome
The paper deals with the patronage of Constantine and of his mother Helena in the New Rome and beyond. Through the exam of buildings, honorary colums and monuments, jewels, illuminated manuscripts and, particularly, sources, the artistic endeavours of the emperors are considered as to delineate a future, more in deep, research.The paper deals with the patronage of Constantine and of his mother Helena in the New Rome and beyond. Through the exam of buildings, honorary colums and monuments, jewels, illuminated manuscripts and, particularly, sources, the artistic endeavours of the emperors are considered as to delineate a future, more in deep, research
Introduction to hemispherical photography in forestry
Hemispherical photography is profusely used in climatology and forest sciences in association with geomatics technology. It is possible to get a detailed record of the canopy and estimate, both of the same structure and understory light transmission, both variables important for forest inventory and management of natural regeneration. Hemispherical photography equipment have very diverse applications, even in artistic photography, and their cost is low compared to specific instruments. Particular knowledge of optics, photography and digital image processing is required to correctly use this technique. The objective of the work is to explain the principle of operation of the hemispherical photography on estimation of structural parameters of forests. This is discussed in terms of optics and photography, digital image processing and estimation of structural parameters. Understanding of these aspects is relevant when it comes to purchasing a computer, capture photographs in the field and use specific software for processing. Photos are raster files, which can be understood as an array of n rows by m columns, where each cell is a pixel. So a raster is displayed as an image, it is necessary to establish a color space and color depth. It is important to note that in the capture of the photography major errors occur, depending on the geographical region, because it is very difficult to meet the ideal lighting conditions.La fotografía hemisférica es profusamente utilizada en climatología y ciencias forestales en vinculación con tecnología geomática. Permite obtener un registro detallado de los claros del dosel y estimar, tanto la estructura del mismo, como la transmisión de luz al sotobosque, ambas variables de gran importancia para el inventario forestal y el manejo de la regeneración natural. Debido a que los equipos de fotografía hemisférica tienen usos muy diversos, incluso en fotografía artística, su costo es bajo en comparación con instrumentos específicos. Para utilizar esta técnica correctamente se requiere de conocimientos particulares de óptica, fotografía y procesamiento digital de imágenes. El objetivo del trabajo es explicar el principio de funcionamiento de la fotografía hemisférica en estimación de parámetros estructurales de bosques. Para ello se discute sobre óptica y fotografía, procesamiento digital de imágenes y estimación de parámetros estructurales. Conocer estos aspectos es relevante para adquirir un equipo, capturar fotografías en el terreno y utilizar softwares específicos para su procesamiento. Las fotografías son archivos raster, los cuales pueden entenderse como una matriz de n filas por m columnas, donde cada celda es un pixel. Para que un raster se visualice como una imagen es necesario establecer un espacio y una profundidad de color. Es importante tener en cuenta que en la captura de la fotografía se producen muchos errores, ya que dependiendo de la región geográfica es muy difícil satisfacer las condiciones ideales de iluminación.Fil: Díaz, Gastón Mauro. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lencinas, Jose Daniel. Centro de Investigación y Extensión Forestal Andino Patagónico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: del Valle, Hector Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin
Assessment of temporomandibular disorder and occlusion in treated class III malocclusion patients
OBJECTIVE: The aims of this study were to compare the prevalence of temporomandibular disorders (TMD) in individuals submitted to either orthodontic or ortho-surgical Class III malocclusion treatment and to assess the influence of occlusal aspects on TMD severity. MATERIAL AND METHODS: The sample consisted of 50 individuals divided into two groups, according to the type of treatment (orthodontic or orthodontic with orthognathic surgery). The presence of signs and symptoms of TMD was evaluated by an anamnestic questionnaire and a clinical examination, including TMJ and muscle palpation, active mandibular range of motion, joint noises and occlusal examination. RESULTS: Based on the anamnestic questionnaire, 48% had no TMD, 42% had mild TMD and 10% had moderate TMD. The presence and severity of TMD did not show any relationship with the type of orthodontic treatment (p>;0.05). The chi-square test showed a positive association (
Combining ontologies and workflows to design formal protocols for biological laboratories
Background
Laboratory protocols in life sciences tend to be written in natural language, with negative consequences on repeatability, distribution and automation of scientific experiments. Formalization of knowledge is becoming popular in science. In the case of laboratory protocols two levels of formalization are needed: one for the entities and individuals operations involved in protocols and another one for the procedures, which can be manually or automatically executed. This study aims to combine ontologies and workflows for protocol formalization.
Results
A laboratory domain specific ontology and the COW (Combining Ontologies with Workflows) software tool were developed to formalize workflows built on ontologies. A method was specifically set up to support the design of structured protocols for biological laboratory experiments. The workflows were enhanced with ontological concepts taken from the developed domain specific ontology.
The experimental protocols represented as workflows are saved in two linked files using two standard interchange languages (i.e. XPDL for workflows and OWL for ontologies). A distribution package of COW including installation procedure, ontology and workflow examples, is freely available from http://www.bmr-genomics.it/farm/cow webcite.
Conclusions
Using COW, a laboratory protocol may be directly defined by wet-lab scientists without writing code, which will keep the resulting protocol's specifications clear and easy to read and maintain
El derecho a la universidad en perspectiva regional
De la mano de los procesos de cambio que emergieron tras la hegemonía neoliberal en América Latina, se produjeron en los últimos quince años- nuevas condiciones políticas para la definición de políticas públicas universitarias, que buscaron disputar e intentar redefinir la lógica de expansión de los sistemas universitarios. Es decir, disputarle al mercado, aunque sea parcialmente, esa expansión, buscando la democratización de la producción de conocimiento. La concepción de este libro y la escritura de los artículos que lo componen se produjeron en ese contexto político y social y dentro de ese horizonte de época, que es el de la universidad como derecho. En este sentido, esta introducción busca proponer una necesaria perspectiva política y conceptual. En la primera parte, se atiende a los cambios en la coyuntura regional, que caracterizamos como “punto de inflexión” (Montero y Collizolli, 2016), y al conjunto de apuestas, desafíos y complejidades que esa situación comporta para el abordaje de la cuestión universitaria regional desde la perspectiva de los derechos. Si la región atraviesa desde 2013, un “punto de inflexión”, tiempo de definiciones respecto del sentido dominante que tendrán los próximos tiempos, esta definición implicará también el sentido de las transformaciones del sistema universitario. En la segunda parte se intenta precisar el sentido, alcance y naturaleza del derecho a la universidad.Facultad de Humanidades y Ciencias de la Educació
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