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Search Results: 1 - 10 of 77611 matches for " Colomer Maria Teresa "
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Protonic conductors for proton exchange membrane fuel cells: An overview
Jurado Ramon Jose,Colomer Maria Teresa
Hemijska Industrija , 2002, DOI: 10.2298/hemind0206264j
Abstract: At present, Nation, which is a perfluorinated polymer, is one of the few materials that deliver the set of chemical and mechanical properties required to perform as a good electrolyte in proton exchange membrane fuel cells (PEMFCs). However, Nation presents some disadvantages, such as limiting the operational temperature of the fuel system (So°C), because of its inability to retain water at higher temperatures and also suffers chemical crossover. In addition to these restrictions, Nation membranes are very expensive. Reducing costs and using environmentally friendly materials are good reasons to make a research effort in this field in order to achieve similar or even better fuel-cell performances. Glass materials of the ternary system SiO2-ZrO2-P2O5, hybrid materials based on Nation, and nanopore ceramic membranes based on SiO2 TiO2, Al2O3, etc. are considered at present, as promising candidates to replace Nation as the electrolyte in PEMFCs. These types of materials are generally prepared by sol-gel processes in order to tailor their channel-porous structure and pore size. In this communication, the possible candidates in the near future as electrolytes (including other polymers different than Nation) in PEMFCs are briefly reviewed. Their preparation methods, their electrical transport properties and conduction mechanisms are considered. The advantages and disadvantages of these materials with respect to Nation are also discussed.
Legal Concepts and Multilingual Contexts in Digital Information  [PDF]
Daniela Tiscornia, Maria Teresa Sagri
Beijing Law Review (BLR) , 2012, DOI: 10.4236/blr.2012.33010
Abstract: Analysis of legal documents cannot be reduced to their linguistic expression. When dealing whit legal texts a distinction should be made between the linguistic form (normative statement) and the content (norm). Norms are conceived as the interpreted meaning of linguistic contexts (partitions in a legal text, fragments of judicial decisions, etc). In the interpretative process, legal practitioners make reference to an external system of concepts that can be assumed, even if not universal, at least shared by a large social and cultural community. As a consequence, legal interpretation and legal conceptualization are strongly influenced by cultural, social and political factors and changes in meaning of legal concepts occur within a synchronic localization in different cultures and within a diachronic evolution process of the environment in which they are created. This dynamic nature of legal knowledge poses serious problems in communicating legal information, and even more in the realm of digital communication, where, in order to manage knowledge across national borders, there is a strong demand of shared vocabularies embedding a shared understanding of legal concept. This paper aims at showing how lexical/terminological resources and conceptual structures, such as ontologies, can be constructed by means of the innovative tools provided by ICT, like the Semantic Web languages, the computational linguistic and the ontology engineering techniques. Such semantic resources may have a strategic role in representing meaning evolution and in investigating social and cultural influences in linguistic uses and, as a further goal, solutions offered by ICT for bridging the gap between form and content can also provide innovative visions of theoretical issues.
Open Mass Cultures of Marine Microalgae for Biodiesel Production: Laboratory Approach to Study Species Competition in Mixed Cultures  [PDF]
Marina Mingazzini, Maria Teresa Palumbo
Natural Resources (NR) , 2015, DOI: 10.4236/nr.2015.63016
Abstract: Since the interspecific competition represents a critical issue for biodiesel production in open mass cultures of microalgae, laboratory studies aimed to select competitive species receive significant interest. In this work, a laboratory approach based on the method of multisizing cell counting was developed to monitor the competition course of single algal species grown in mixed cultures. Two marine microalgae, Dunaliella tertiolecta and Phaeodactylum tricornutum, were used to set-up an induced-contamination assay, with the aim to test their competitive capabilities. The evaluation of the oil production by dried biomass extraction was coupled to the growth assay to investigate the effect of competition on oil yield. The adopted experimental approach revealed effective as a method to selectively measure the algal growth of single species in mixed cultures, enabling to evaluate the competitive properties of Dunaliella outgrowing the contaminant species Phaeodactylum. At the end of the experiment the dominant species contributed more than 90% to the total biomass, while no loss of oil production was observed, the oil yield in the mixed being even higher than in the unialgal culture (3.15 vs. 2.28 mg). The outcomes of the induced competition suggest the use of Dunaliella as a competitive oil-producer species and especially support the potential of the experimental approach to be used for preliminary screening to drive species selection for open mass cultures.
Seawater Intrusion and Salinization Processes Assessment in a Multistrata Coastal Aquifer in Italy  [PDF]
Giuseppe Sappa, Maria Teresa Coviello
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.411111
Abstract: This paper presents the results of the investigations, driven by different techniques, including environmental tracers and geophysical methods, in the aim of better understand the causes of the current salt-water intrusion in the Pontina Plain, in the south of the Lazio Region (Italy). In the last 50 years many investigation campaigns have been carried out to evaluate the evolution of salt-water intrusion. This is an area with a strong man-made residential and tourist impact and, in the some cases, it is characterized by intensive agricultural practices. Therefore, it can be affected not only by salt-water intrusion, but by the salinization of its groundwater also due to other factors. All these factors have led the Pontina Plain to a groundwater situation which makes the groundwater resource management and the planning of their future exploitation very difficult.
Mindfulness for Disabled University Students—A Sporting-Motor Activity and Meditative Workshop Aimed at Reducing Stress and Increasing Coping Resources  [PDF]
Giulia Savarese, Maria Teresa Ingino
Psychology (PSYCH) , 2018, DOI: 10.4236/psych.2018.914164
Abstract: The data collected from disabled university students who participated in a mindfulness workshop in Italy are presented. The workshop activities are also described. These were aimed at reducing stress and improving coping skills, the sense of self and social relationships. This is the first experience of a mindfulness course with university students with varying types of disability. The initial results were positive in creating the following within the participants: a less emotional interpretation of the world; a greater acceptance of their own difficulties; reduced stress; and, at the same time, implementation of various coping methods and improved self-esteem and social interaction.
Biological Therapy and Risk of Malignancies: A Literature Review  [PDF]
Gilda Sandri, Valentina Cestelli, Maria Teresa Mascia
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.43A056
Abstract: Data from literature show that the overall risk of cancer does not as a result from treatment with these drugs. The only cancer for which various authors have reported an increased risk, in some cases, are skin cancers, different from melanoma and melanoma. Recent results of large observational studies and meta-analyzes indicate the absence of an increased risk of lymphoma related to therapy with anti-TNF-α. It has been reported, by some authors, that there is a possible increased risk of lung cancer, especially in patients with chronic obstructive pulmonary disease. There is limited information in literature about the effects of biologics in patients with a history of cancer. Most of the guidelines indicate that treatment with biologics can be considered with caution and only in patients free of cancer since at least 5 years. Some studies report a lower oncological risk with etanercept compared to monoclonal antibodies, especially in the case of lymphoma. However, this data has not been confirmed in other studies, and has been associated with a limited period of time after starting therapy. Information about the latest biological therapies is still poor. Therefore, there is not sufficient evidence for a preferential use of certain drugs rather than others.
Addressing Healthcare Needs in Older People after Discharge  [PDF]
Maria Grazia Proietti, Teresa Compagnone, Giuseppe Liotta
Advances in Aging Research (AAR) , 2014, DOI: 10.4236/aar.2014.33035
Abstract:

Healthcare needs should be addressed even when patients return home. The purpose of this study was to support a multidimensional assessment upon discharge to plan domiciliary care. Materials and Methods: This is a multicentre cross-sectional study that uses the Geriatric Functional Assessment questionnaire to assess healthcare needs. The questionnaire was administered upon discharge to 358 people aged over 65. Results: About 20% of our sample required healthcare support after discharge and 32% needed some sort of supervision. Most of the healthcare requirements involved socio-economic needs, neurological diseases, and inability to autonomously perform instrumental activities of daily living. Discussion: It is crucial to have an optimal discharge plan for older inpatients. Nurses play a key role in managing the care continuum process, and they have the instruments to select those requiring “supported discharge”, and collaborate with district nurses who can arrange healthcare interventions jointly with other professionals. They can facilitate access to resources, medical devices and aids required to restore patient autonomy.

Sensory Perceptions of Virgin Olive Oil: New Panel Evaluation Method and the Chemical Compounds Responsible  [PDF]
Diana De Santis, Maria Teresa Frangipane
Natural Science (NS) , 2015, DOI: 10.4236/ns.2015.73015
Abstract: The stimulation of the human sensory receptors by compounds present in virgin olive oils (VOOs) gives rise to the sensory attributes that describe its particular aroma. The sensor panel evaluation and the molecules responsible for sensory perceptions of virgin olive oil quality are elucidated. The methodology for the evaluation of the sensory characteristics of VOOs is reported, and typical flavours and off-flavours are described. Relationships between chemical compounds and sensory characteristics are evaluated using the new sensory analyses method promoted by the International Olive Oil Council (IOOC) and included recently in EU regulation (Reg. 1348/2013 and following revisions). Oil quality may be defined in a number of ways, but the sensory perception of flavour is the ultimate determinant.
Let Some Unforeseen Knowledge Emerge from Heterogeneous Documents  [PDF]
Maria Teresa Pazienza, Armando Stellato, Andrea Turbati
Journal of Computer and Communications (JCC) , 2016, DOI: 10.4236/jcc.2016.46001
Abstract: Data production and exchange on the Web grows at a frenetic speed. Such uncontrolled and exponential growth pushes for new researches in the area of information extraction as it is of great interest and can be obtained by processing data gathered from several heterogeneous sources. While some extracted facts can be correct at the origin, it is not possible to verify that correlations among the mare always true (e.g., they can relate to different points of time). We need systems smart enough to separate signal from noise and hence extract real value from this abundance of content accessible on the Web. In order to extract information from heterogeneous sources, we are involved into the entire process of identifying specific facts/events of interest. We propose a gluing architecture, driving the whole knowledge acquisition process, from data acquisition from external heterogeneous resources to their exploitation for RDF trip lification to support reasoning tasks. Once the extraction process is completed, a dedicated reasoner can infer new knowledge as a result of the reasoning process defined by the end user by means of specific inference rules over both extracted information and the background knowledge. The end user is supported in this context with an intelligent interface allowing to visualize either specific data/concepts, or all information inferred by applying deductive reasoning over a collection of data.
Pangea, una xarxa al servei de l'educació
Miquel Colomer
Temps d'Educació , 1996,
Abstract:
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