Time filter

Source Type

Mazzolai G.,University Telematica e Campus
Recent Patents on Materials Science | Year: 2012

The present review of the most recent patents outlines the progress made over the last five years in the search of novel materials and processes that might allow large amounts of hydrogen to be stored on board of vehicles. Worth of note are the results of certain abinitio calculations proving that some compounds not yet synthesized might, actually, show features approaching the requirements of the US Department of Energy. Significant progress has been made concerning the absorption/desorption reversibility of Li-N-H compounds (amides/imides, LiH, Li 3N), borohydrides and boranes. These materials, at the actual state of the art, appear still largely inadequate to comply with DOE targets. However, their intrinsic high mass capacity offers wide margin for further research in this area. The achievements made with alanates, magnesium-based hydrides and bcc-alloy hydrides, although of great significance from a point of view of the fundamental research, nonetheless, appear to be of limited impact from a practical point of view, at least for automotive applications. This is mainly due to the relatively low intrinsic mass capacity of these materials. © 2012 Bentham Science Publishers.

Caresana F.,Marche Polytechnic University | Brandoni C.,University Telematica e Campus | Feliciotti P.,Marche Polytechnic University | Bartolini C.M.,Marche Polytechnic University
Applied Energy | Year: 2011

Micro-combined heat and power (CHP) systems are a key resource to meet the EUCO2 reduction agreed in the Kyoto Protocol. In the near future they are likely to spread significantly through applications in the residential and service sectors, since they can provide considerably higher primary energy efficiencies than plants generating electricity and heat separately. A 28kWe natural gas, automotive-derived internal combustion engine CHP system was modeled with a view to comparing constant and variable speed operation modes. Besides their energy performances, the paper addresses the major factors involved in their economic evaluation and describes a method to assess their economic feasibility. Typical residential and service sector applications were chosen as test cases and the results discussed in terms of energy performances and of profitability. They showed that interesting savings can be obtained with respect to separate generation, and that they are higher for the household application in variable speed operating conditions. In fact the plant's energy performance is greatly enhanced by the possibility, for any given power, to regulate the engine's rotational speed. From the economic viewpoint, despite the higher initial cost of the variable speed concept, the system involves a shorter pay-back period and ensures greater profit. © 2010 Elsevier Ltd.

Melone L.,Polytechnic of Milan | Melone L.,University Telematica e Campus | Petroselli M.,Polytechnic of Milan | Pastori N.,Polytechnic of Milan | Punta C.,Polytechnic of Milan
Molecules | Year: 2015

N-hydroxyphthalimide (NHPI) is an organocatalyst for free-radical processes able to promote the aerobic oxidation of a wide range of organic substrates. In particular, NHPI can catalyze the hydroperoxidation of polyunsaturated fatty acids (PUFA). This property could be of interest for biological applications. This work reports the synthesis of two β-cyclodextrin derivatives (CD5 and CD6) having a different degree of methylation and bearing a NHPI moiety. These compounds, having different solubility in water, have been successfully tested for the hydroperoxidation of methyl linoleate, chosen as the PUFA model molecule.

Melone L.,Polytechnic of Milan | Melone L.,University Telematica e Campus | Bonafede S.,Polytechnic of Milan | Tushi D.,Polytechnic of Milan | And 2 more authors.
RSC Advances | Year: 2015

The cross-linking, via amide bond formation, of TEMPO-oxidized cellulose nanofibers with branched-polyethyleneimine functionalized with pNO2-phenyl urea units generates a novel polymeric conjugate material, with a sponge-like morphology, which can be successfully used for the heterogeneous sensing of fluoride anions in DMSO solution. © The Royal Society of Chemistry.

Maresca P.,University of Naples Federico II | Guercio A.,Kent State University | Stanganelli L.,University Telematica e Campus | Arndt T.,Cleveland State University
Journal of E-Learning and Knowledge Society | Year: 2014

Cooperative learning is a paradigm of collaboration aimed to reach a common goal. The trend of using social networks and social media to deliver and exchange knowledge leads us to believe that collaboration skills must be strongly promoted to empower users to learn with and from each other to support the educational challenges of this century. In this paper we discuss the primary needs of a modern educational system and we present the ETCplus project, a model of cooperation that has as its primary focus students’ cooperation in an academic environment. Two distinct experiments involving cooperative learning with two international universities are discussed. The first describes a system in an environment that is left to evolve autonomously. The second presents a system in a controlled environment that uses an accelerator to speed the learning process. The process of collaboration was built on a shared platform. Students’ feedback shows that cooperative learning produces better results when consonance and resonance are reached. The paper discusses the pros and cons of the ETCplus project. © 2014 Giunti. All rights reserved.

Discover hidden collaborations