Estudio de las técnicas de reconocimiento facial en obras de arte a través de la visión por computador

El objetivo de esta investigación es comprobar la utilidad de las técnicas actuales de reconocimiento facial a través de la visión por computador en entornos museísticos. Para alcanzar este fin, he seguido las estrategias de diseño y creación para crear una aplicación que me permita posteriormente realizar una serie de experimentos, los cuales me proporcionarán los datos necesarios con los que evaluar la funcionalidad de estas técnicas existentes en obras de arte, en mi caso concretamente, sobre cuadros.

El arte funcional. Infografía y visualización de la información

Presentación de cómo organizar datos para que adopten patrones visuales que sean fácilmente perceptibles por los usuarios. Creación de herramientas que los usuarios puedan utilizar para analizar los datos y descubrir en ellos realidades en las que el diseñador, en ocasiones, ni siquiera había pensado.

Antimoniais empregados no tratamento da leishmaniose: estado da arte

Antimony preparations are the drugs of choice for the treatment of leishmaniasis over 90 years, a disease that currently affects 12 million people worldwide. Its introduction was based on 19th century concepts of therapeutic effects of metal salts as arsenicals and other metals, most of them abandoned due to toxic effects or better drugs. In the last three decades, there was a great improvement in the knowledge of cell biology and immunology of those infections, but chemotherapy has not been improved in the same strength. The structure and mechanism of action of the two pentavalent antimonial drugs of choice, meglumine antimoniate and sodium stibogluconate, are not well known and the contamination of those pharmaceutical by toxic contaminants have been verified.

La Companyia de Jesús a les Històries d’Espanya Moderna

L’objectiu d’aquest estat de la qüestió és analitzar com s’ha estudiat historiogràficament la Companyia de Jesús a l’Espanya dels segles XVI, XVII i XVIII, des de la seva fundació fins la seva expulsió dels territoris de la Monarquia Hispànica. Es farà a partir principalment dels manuals i històries de Espanya, ampliant la informació amb algunes de les principals obres de referència d’Història de l’Església. A partir de la bibliografia es veu com l’objecte d’estudi aquí contemplat s’estudia des de diversos àmbits –social, ideològic, cultural, polític, econòmic–. Per aquest motiu, l’estudi es centrarà primerament en els primers inicis de la Societat de Jesús, així com en la figura del seu fundador, Ignasi de Loiola. En segon lloc, tractarà l’estreta relació dels jesuïtes amb la Reforma catòlica i la Contrareforma, així com la seva forma d’interpretar la fe i els conflictes que provocaren amb altres ordres. En tercer lloc, estudiarà l’educació jesuítica, les seves característiques, la seva finalitat i la qüestió de l’especialització en les elits. En últim lloc, es preocuparà per les relacions entre la Companyia de Jesús i la monarquia, destacant el paper dels confessors reials, el motí d’Esquilache i la seva expulsió.

Métodos imunoquímicos para análise de contaminantes ambientais: conceitos, estado da arte e perspectivas

Immunoassay techniques provide simple, powerful and inexpensive methods for analysis of environmental contaminants. However, the acceptance of immunoassays is dependent on the clear demonstration of quality and validity compared to more traditional techniques. In this review, primarily, the understanding and the fundamentals of immunoassay methods are given in order to make good use of immunoassays, especially of EIA tests. Special attention is given to the concepts related to the enzyme-linked immunosorbent assay (ELISA) formats, such as inhibition concentration at 50% (IC50), detection limit (LOD), cross-reactivity (CR %). It is also explained why some immunoassays are quantitative methods whereas others can only be used as screening methods. A list of main commercial kits for detection of priority pollutants is given in order to help analysts. Others formats, such as flow-injection immunoassay analysis (FIIA), immunoassay chromatography and immunosensors are also cited.

Álvaro Cunqueiro y la defensa de la autosuficiencia del arte. Una cala en el 'Destino' de los años sesenta

Si bien Álvaro Cunqueiro había colaborado estrechamente con el semanario Destino durante la primera posguerra, hasta la década de los sesenta no volvió a cobrar cierto protagonismo en las páginas culturales de la revista. Es entonces, aún vigentes los últimos coletazos del realismo social en la novela española, cuando Destino enarboló el ejemplo de Cunqueiro como propuesta estética alternativa. En este trabajo glosaremos cómo la obra del escritor gallego se tomó como bandera a través de textos críticos de, fundamentalmente, Guillermo Díaz-Plaja, Antonio Vilanova, Néstor Luján o Joan Perucho. Palabras clave: Álvaro Cunqueiro, Guillermo Díaz-Plaja, prensa, crítica literaria, novela española de posguerra.

Cerâmicas bioativas: estado da arte

Bioactive glasses undergo corrosion with leaching of alkaline ions when exposed to body fluids. This results in the spontaneous formation of a layer of hydroxyapatite (HA), the mineral component of natural bone, which in turn can induce bone growth in vivo. This paper describes the different types of bioactive glasses, the characterization methods currently used, and the main factors that influence their bioactivity. Nucleation and crystallization, the main mechanisms involved in the formation of hydroxyapatite, Ca10(PO4)6(OH)2, are discussed as a function of the chemical composition and the reactivity of the surface of the material. Finally, promising applications are considered.

La revista barcelonesa 'El Arte de Curtir' y el quebracho colorado paraguayo: periodismo y economía

[spa]Este trabajo analiza el papel desempeñado por la revista El Arte de Curtir, creada en el año 1909 en la ciudad de Barcelona por los hermanos Pedro Pablo, Fernando y Carlos de Corral y Tomé, cuya Fábrica de Extractos Curtientes dedicada al quebracho colorado paraguayo fue la base de organización del extracto tánico utilizado en Cataluña para la curtición.

Os produtos naturais e a química medicinal moderna

Natural products have been utilized by humans since ancient times and the relief and cure of their diseases was the first purpose for using natural products in medicine. The history of the oriental and occidental civilizations is very rich in examples of the utilization of natural products in medicine and health care. Chinese traditional medicine is one of the most important examples of how natural products can be efficient in the treatment of diseases, and it points to the importance of scientific research on natural products, concerning the discovery of new active chemical entities. The complexity, chemical diversity and biological properties of natural products always fascinated people, and during the last 200 years, this led to the discovery of important new drugs. In the last 30 years, the development of new bioassay techniques, biotechnology methods, bio-guided phytochemical studies, automated high throughput screening and high performance analytical methods, have introduced new concepts and possibilities of rational drug design and drug discovery. In this context, natural products have played an important and decisive role in the development of modern medicinal chemistry.

Biologia química: uma estratégia moderna para a pesquisa em produtos naturais

This paper presents an overview of the Natural Products Research in Brazil in the last five years (2002-2006), and also discusses how some relevant aspects of the Chemical Biology area could create new research opportunities and challenges for the natural product chemists. In addition, some aspects of the scientific policies and their impact on current projects are discussed.

Química Medicinal Moderna: desafios e contribuição brasileira

The main aspects of the modern Medicinal Chemistry, among the classic and industrial paradigms, used in the drug discovery process will be treated. The contribution of the Brazilian science in the knowledge generation in Medicinal Chemistry will be demonstrated, with base in searches accomplished in the portal Web of Science® 7.10 and in the directory of groups of research of CNPq.

O estado da arte da cromatografia associada à espectrometria de massas acoplada à espectrometria de massas na análise de compostos tóxicos em alimentos

Chromatography combined with several different detection systems is one of the more used and better performing analytical tools. Chromatography with tandem mass spectrometric detection gives highly selective and sensitive analyses and permits obtaining structural information about the analites and about their molar masses. Due to these characteristics, this analytical technique is very efficient when used to detect substances at trace levels in complex matrices. In this paper we review instrumental and technical aspects of chromatography-tandem mass spectrometry and the state of the art of the technique as it is applied to analysis of toxic substances in food.

Lo que no es nuevo puede ser actual: hacia distintos puntos de mira de la didáctica del arte What is not new can be current - towards different approaches of the didactics of art

With this article we want to present a state of affairs of the didactics of art in our context, and at the same time we want todiscuss on its pluri- and interdisciplinary construction. We check the different disciplines that configure it and we analysethe paradigm of artistic education as a discipline (DBAE) and its passage to post-modernity. This example focuses thediscussion about the opportunity of adapting holistic educative models and the transition of the current educativeinnovation towards skill models

O estado da arte da cromatografia líquida de ultra eficiência

Ultra Performance Liquid Chromatography (UPLC) retains the same principles as High Performance Liquid Chromatography (HPLC), but uses 1-2.1 mm i.d. columns with sub-2 µm particles. It is considered the newest advance in analytical separation science. The use of these small particles with mobile phases at high linear velocities increases resolution and detectability and decreases analysis time. Thus, the analyses are faster, the solvent volume is smaller, the efficiency is higher and the detectability is 2-3 times higher when compared with HPLC analysis.

Eletrocromatografia capilar: contextualização, estado da arte e perspectivas

Capillary electrochromatography (CEC) is a separation technique in which the mobile phase flow is based on the application of a voltage across a packed capillary, which generates an electroosmotic flow that transports the analytes along the capillary toward the detector. As it combines the separation mechanisms of high-performance liquid chromatography (HPLC) and of capillary electrophoresis (CE), CEC can be considered a hybrid of HPLC and CE. This review presents some fundamental aspects of CEC and is focused on the instrumental advances of the technique, such as column technology, operation modes and detection systems, presenting recent papers on these topics and some applications and perspectives about CEC.