Search results for "48"
showing 10 items of 1388 documents
Controlling thermal conductance using three-dimensional phononic crystals
2021
Controlling thermal transport at the nanoscale is vital for many applications. Previously, it has been shown that this control can be achieved with periodically nanostructured two-dimensional phononic crystals for the case of suspended devices. Here, we show that thermal conductance can also be controlled with three-dimensional phononic crystals, allowing the engineering of the thermal contact of more varied devices without the need for suspension in the future. We show the experimental results obtained at sub-Kelvin temperatures for two different period three-dimensional crystals and for a bulk control structure. The results show that the conductance can be enhanced with the phononic cryst…
Transmetabolism: the non‐conformist approach to biotechnology
2021
Research work of the author is funded by Agencia Estatal de Investigación (AEI), Ministerio de Ciencia e Innovación (grant SETH ref. RTI2018-095584-B-C41-42-43-44 co-financed by ERDF) and the European Union H2020 (BioRobooST project ID 210491758; MIPLACE project ref. PCI2019-111845-2, Programación Conjunta Internacional 2019, AEI).
Protection from fishing improves body growth of an exploited species
2022
Hunting and fishing are often size-selective, which favours slow body growth. In addition, fast growth rate has been shown to be positively correlated with behavioural traits that increase encounter rates and catchability in passive fishing gears such as baited traps. This harvest-induced selection should be effectively eliminated in no-take marine-protected areas (MPAs) unless strong density dependence results in reduced growth rates. We compared body growth of European lobster ( Homarus gammarus ) between three MPAs and three fished areas. After 14 years of protection from intensive, size-selective lobster fisheries, the densities in MPAs have increased considerably, and we demonstrate t…
Assessment of Arundo donax Fibers for Oil Spill Recovery Applications
2019
In the last years, natural fibers are increasingly investigated as an oil recovery system in order to overcome the oil spillage phenomena, thus preserving environment and aquatic life. In particular, lignocellulose-based fibers have recently been employed with promising results. In such a context, the aim of this paper is to assess the oil sorption capability of natural fibers extracted from the stem of the giant reed Arundo donax L., a perennial rhizomatous grass belonging to the Poaceae family that grows naturally all around the world thanks to its ability to tolerate different climatic conditions. Sorption tests in several pollutants and water as a reference were carried out. The fibers …
Perspectives on Cluster Evolution: Critical Review and Future Research Issues
2015
The past two decades have witnessed an ever-growing scholarly interest in regional clusters. The focus of research has mainly been on why clusters exist and what characteristics “functioning” clusters hold. Although the interest in more dynamic views on clusters is not new, in recent years, however, more attention has been paid to providing better explanations of how clusters change and develop over time, giving rise to an increasing popularity of different variants of the cluster life cycle approach. This article offers a critical review of various cluster life cycle models. We discuss the key ideas and arguments put forward by their main protagonists and we identify several shortcomings –…
Efficacy and Efficiency of Italian Energy Policy: The Case of PV Systems in Greenhouse Farms
2014
The production of energy from renewable sources is a form of energy production that has less impact on the environment than the traditional one. For the farmer this new form of production represents an opportunity, especially for the economic benefits that can produce, both in terms of the incentives provided by the public operator and for higher revenues, deriving from the sale of energy back to the grid and/or the savings generated by self-consumed energy, that help to increase the farmer’s income. In this paper, we analyzed a case study of a farm that has realized a grid-connected photovoltaic (PV) system on a greenhouse. In particular, firstly the farm profitability has been estimated a…
Comparison of Hybrid Blends for Solar Cell Application
2010
In blended hybrid systems distinct micro- or nanostructured materials can be formed by phase separation. Network structures of particles or rods in a polymer matrix can be developed via self-assembly. We use this blending approach to compare active materials for application in solar cell devices. Blends were fabricated from either poly(hexylthiophene) P3HT or poly(triphenylamine) PTPA mixed with nanocrystalline TiO 2 rods. In this manner, we compare two different hole conducting polymers in their performance in photovoltaic devices, while experimental conditions are kept identical. We find that the choice of solvent and photovoltaic characterization conducted in inert atmosphere is of impor…
An Environmental Analysis of the Effect of Energy Saving, Production and Recovery Measures on Water Supply Systems under Scarcity Conditions
2015
Water is one of the primary resources provided for maintaining quality of life and social status in urban areas. As potable water is considered to be a primary need, water service has usually been managed without examining the economic and environmental sustainability of supply processes. Currently, due to increases in energy costs and the growth of environment preservation policies, reducing water leakage, energy consumption and greenhouse gas (GHG) production have become primary objectives in reducing the environmental footprint of water service. The present paper suggests the implementation of some performance indicators that show the interdependence of water loss, energy consumption and…
Gozos del glorioso Santo Tomas de Villanueva, Arzobispo de Valencia, venerado en el Real Convento de N. S ̇del Socorro, extramuros de Valencia, donde…
1750
El full orlat Grav. xil. enmarcat de "S. Tomàs de Villanueva", flanquejat per gerros amb flors El text del goig a tres col. separades per filets
Cuando los menores declaran en la justicia de menores | When youngsters speak in juvenile justice
2019
Resumen: La Convención sobre los Derechos de los Niños incorpora los derechos de participación al elenco de derechos e insiste en la realización del derecho a ser escuchado porque consolidan una nueva imagen del niño como sujeto de derecho. Esa escucha del menor de edad en sede judicial, cuando ha cometido un delito, debe permitirle sentirse partícipe del proceso y que el juicio sea percibido como justo y las medidas entendidas como legítimas. Dada la trascendencia de esta escucha, es importante analizar cómo se realiza y qué sentido se le da en la declaración del menor ante la policía o la fiscalía.
 Abstract: The Convention on Children's Rights incorporates the rights of participatio…