Search results for "GRI"
showing 10 items of 10209 documents
Digital control circuitry for the p53 dynamics in cancer cell and apoptosis
2010
Abstract Experimental work and theoretical models deduce a “digital” response of the p53 transcription factor when genomic integrity is damaged. The mutual influence of p53 and its antagonist, the Mdm2 oncogene, is closed in a feedback. This paper proposes an aerospace-based architecture for translating the p53/Mdm2/DNA damage network into a digital circuitry in which the optimal control theory is applied for obtaining the requested dynamic evolutions of some considered cell species for repairing a DNA damage. The purpose of this paper is to demonstrate the usefulness of such digital circuitry design to detect and predict the cell species dynamics for shedding light on their inner and mutua…
Ethyl hexanoate transfer in paper and plastic food packaging by sorption and permeation experiments
2008
The barrier properties of one treated paper packaging and one standard plastic film (bi-oriented polypropylene, biOPP) were assessed for ethyl hexanoate. Three methods based either on sorption (gravimetry and micro-atmosphere-derived method) or permeation kinetic determination were used in controlled conditions of aroma vapor concentration (107 Pa), temperature (25 degrees C) and relative humidity (about 0 %). Ethyl hexanoate solubility values were on the same range of magnitude for both packaging films in spite of their different nature and composition. Ethyl hexanoate affinity for both films was well predicted by their respective solubility parameters. Solubility values were different acc…
I paesaggi agrari tradizionali. Un percorso per la conoscenza
2014
Tra campagna e città: tutela e valorizzazione del paesaggio periurbano
2009
Abstract. Le aree periurbane, scenario di una cultura rurale trasfigurata, contrassegnata da matrici e dinamiche contrapposte, includono spazi e interazioni socioeconomiche di notevole complessità. Esse richiedono una visione progettuale di territorio e di paesaggio in grado di combinare dimensione produttiva, uso sostenibile delle risorse e progetto di sviluppo locale condiviso dalla collettività, attraverso di politiche di sviluppo basate sul rafforzamento del valore relazionale tra storia, natura e identità locali. La campagna periurbana diviene luogo di sperimentazione di strategie per affrontare le problematiche poste dalla diffusione urbana, mentre si rivela di crescente interesse lo …
Combustion behavior of black liquors : droplet swelling and influence of liquor composition
2017
The combustion of black liquor (BL) in a recovery boiler is a central process in a kraft pulp mill for recovering the cooking chemicals and for producing heat and power. This work explored the most important combustion behavior of BL, the swelling of in-flight droplets, from the viewpoint of liquor composition. It also studied the combustion behavior of BL droplets obtained from two biorefining subprocesses (carbonation and hot-water pretreatment, HWP) and sulfur-free pulping alternatives (soda-anthraquinone (AQ) and oxygen-alkali pulping). The formation of a plastic state essential for the swelling of BL droplet was found to result from the melting of an array of carbohydrate-derived aliph…
La pandemia de COVID-19 a la luz de la historia de la medicina
2020
La actual pandemia producida por el nuevo coronavirus SARS-CoV-2 ha originado, desde que a finales de 2019 surgiera en la ciudad china de Wuhan, el contagio de más de dos millones y medio de personas en 185 países de todo el mundo, con una cifra de fallecidos que superaba los 180.000 a finales de abril. ¿Se pueden encontrar similitudes con otras epidemias del pasado en cuanto a la manera de originarse, la forma de expandirse, el pánico desatado en la población, las medidas tomadas por las autoridades para frenar el contagio y las repercusiones médicas, demográficas y económicas? La reflexión históricomédica sobre la evolución de las infecciones puede darnos una perspectiva amplia que ayude …
Paroimijas Sudas leksikonā: forma un jēdzieniskais saturs
2020
Maģistra darba Paroimijas Sudas leksikonā: forma un jēdzieniskais saturs mērķis ir izpētīt Sudas leksikonā atrodamo paroimiju struktūru, saturu un pielietojumu. Darba ietvaros ir mēģināts izveidot sengrieķu paroimijas definīciju, kas ietver gan saturisko, gan strukturālo aspektu. Maģistra darbs sastāv no trim nodaļām – Paroimija, Paroimijas statuss un struktūra, Paroimijas Sudas leksikonā. Darba teorētiskajā daļā aplūkotās antīko autoru atziņas par paroimijas saturu ir papildinātas ar mūsdienu zinātnieku paroimijas struktūras analīzi, kā arī ir apskatīta paroimijas definēšanas un tulkošanas problemātika. Praktiskajā daļā ir analizētas lemmas, kuru pamatā ir kādas paroimijas, kas tiek skaidr…
Measuring the perceived value of rural tourism: a field survey in the western Sicilian agritourism sector
2016
Rural tourism constitutes a valuable tool for the sustainable development of many rural areas. This paper examines the concept of perceived value in rural tourism. A quantitative field survey was carried out in some main Western Sicilian holiday farms (agritourisms) during the Spring 2014. A theoretical model of the tourists’ perceived value in this specific context was developed and validated, using a 22-item scale. Using Partial Least Squares Path Modelling a theoretical structural model of the multidimensional structure of the RTPV was tested, assessing intensity and direction of the causal relationships among RTPV and its dimensions. Five dimensions were identified as forming the constr…
A CNN Adaptive Model to Estimate PM10 Monitoring
2006
In this work we introduce a model for studying the distribution and control of atmospheric pollution from PM10. The model is based on the use of a cellular neural network (CNN) and more precisely on the integration of the mass-balance equation; at the same time it simulates the scenario regarding a planar grid describing the whole studied area (the city of Palermo) by means of a CNN and a set of Bayesian networks. The CNN allows us to define a grid system whose dynamic evolution is a redefinition of the diffusion equation that considers contributions coming from near cells for each element of the grid. Dynamics of each cell is influenced by meteorological effects and by parameters related t…
Estimation of key biophysical parameters related to crop stress through new remote sensors and multi-crop in situ data
2020
El monitoreo de los cultivos a lo largo de toda la etapa de crecimiento es esencial para detectar anomalías y optimizar los costes y recursos del sector agrícola. Las variables biofísicas de la vegetación, principalmente el contenido en agua, el índice de área foliar o la clorofila, están consideradas indicadores importantes de la salud, crecimiento y productividad de la vegetación. Además, estos parámetros biofísicos no solo son importantes por proporcionar información por sí mismos del estado fisiológico de la vegetación, también porque son parámetros clave de entrada en importantes modelos agronómicos. La medida directa de estos parámetros biofísicos sobre el terreno requiere elevados re…