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Search Results: 1 - 10 of 1740 matches for " Maurizio Sansotera "
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An Environmentally Friendly Class of Fluoropolyether: α,ω-Dialkoxyfluoropolyethers
Menghua Wu,Walter Navarrini,Gianfranco Spataro,Francesco Venturini,Maurizio Sansotera
Applied Sciences , 2012, DOI: 10.3390/app2020351
Abstract: The α,ω-dialkoxyfluoropolyethers (DA-FPEs) characterized by the structure R HO(CF 2CF 2O) n(CF 2O) mR H have been developed as a new class of environmentally friendly hydrofluoroethers (HFEs) suitable as solvents, long-term refrigerants, cleaning fluids, and heat transfer fluids. Synthetic methodologies for DA-FPEs described here consist of radical-initiated oxypolymerization of olefin, peroxy-elimination reaction in peroxidic perfluoropolyethers (P-PFPEs) and further chemical modification of α,ω-diacylfluoride PFPE. The physical properties of selected α,ω-dimethoxyfluoropolyethers (DM-FPEs) have been evaluated and compared with analogous hydrofluoropolyethers (HFPEs) having -OCF 2H as end-groups. Atmospheric implications and global warming potentials (GWPs) of selected DA-FPEs are also considered.
Micromanufacturing in Fused Silica via Femtosecond Laser Irradiation Followed by Gas-Phase Chemical Etching
Francesco Venturini,Maurizio Sansotera,Rebeca Martinez Vazquez,Roberto Osellame,Giulio Cerullo,Walter Navarrini
Micromachines , 2012, DOI: 10.3390/mi3040604
Abstract: Femtosecond laser irradiation followed by chemical etching (FLICE) with hydrogen fluoride (HF) is an emerging technique for the fabrication of directly buried, three-dimensional microfluidic channels in silica. The procedure, as described in literature, consists of irradiating a silica slab followed by chemical etching using hydrogen fluoride. With aqueous HF the etching process is diffusion-limited and is self-terminating, leading to maximum microchannel lengths of about 1.5 mm, while the use of low-pressure gaseous HF etchant can quickly produce 3 mm long channels with an aspect ratio (Length/Diameter) higher than 25. By utilizing this methodology the aspect ratio is not constant, but depends on the length of the channel. When the microchannel is short the aspect ratio increases quickly until it reaches a maximum length at around 1400 μm. Thereafter the aspect ratio starts to decrease slowly. In this paper we present a variation of the low-pressure gaseous HF etching method, which is based on the dynamic displacement of the etchant. This method results in a 13% increase in the aspect ratio (L/D = 29) at the expense of a low etching speed (4 μm/min).
The happy celiac: An oxymoron or a possibility?  [PDF]
Maurizio Esposito
Health (Health) , 2012, DOI: 10.4236/health.2012.45041
Abstract: Background: Several international studies, confirmed in Italy too, show a hard presence of socio-relational problems inside the celiac population. Methods: Qualitative study involving persons with celiac disease and their families. 25 individual semi-structured interviews were conducted in three Italian regions. Results: Problems of management of social life for celiac persons are experienced, specially in the fields of: school, work, travels and life outside the home. Conclusion: Chronic illness is a “biographical disruption” [1] and the whole society has to be invested to fight the burden of celiac persons in their possibility of access to public life.
The Social World of Seafarers. A Sociological Research in Central Italy  [PDF]
Esposito Maurizio
Advances in Applied Sociology (AASoci) , 2013, DOI: 10.4236/aasoci.2013.34027
Abstract: Background: This article analyzes the social world of seafarers, with the aim of crossing the boundary defining the field of social sciences and entering the area of knowledge, where, to paraphrase Marcel Mauss, scientists argue for a place. Methods and Instruments: The research is based on an empirical study carried out at port authorities, fishermen’s cooperatives and fish markets in a few regions of central Italy during a two year period using empirical research methods utilized in fields of sociological knowledge, such as: semi-structured interviews, talks and informal conversations. The qualitative research was conducted through Computer Assisted Qualitative Data Analysis Software using the software Atlas.ti. Our attempt is to study in depth, through an empirical study conducted on a sample of 119 individuals, the heuristic subject on seafarers, in particular sailors and fishermen, specifically from a sociological point of view. The focus is an analysis of the life-worlds of these people in connection with variables such as the socio-economic characteristics of households, the relationship with the primary nuclear family, the element of solitude (in connection with individual feelings like melancholy and nostalgia), the relationship with peers and the crew. Results: From empirical research, it is seen that sailors and fishermen, despite their different local facets, represent a social world characterized by the richness of its material, social and symbolic expressions. The craft of the sea unites them, sometimes creating a subculture absolutely different from that of other populations and subcultures.
The Rehabilitation Role of Punishment in Prisons in Italy. Theoretical Development and Sociological Considerations  [PDF]
Maurizio Esposito
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.42018
Abstract:

This article deals with punishment and prisons, in particular, the rehabilitative role of punishment in Italian prisons. This role is herewith specified: On the one hand, by sociological considerations on punishment and prisons, based on the studies of Clemmer and Goffman; on the other hand, by international rules and the Italian legislation, dating back to the Reform of the Penitentiary Code 1975 and lastly, from a critical point of view. Generally speaking, the term rehabilitative model in this context means to restore solidarity with the socially recognized values, reconstructing the broken citizenship bond.

Suicidal Risk in Italian Prisons. A Population-Based Cohort Study  [PDF]
Maurizio Esposito
Sociology Mind (SM) , 2018, DOI: 10.4236/sm.2018.81004
Abstract: The article deals with the problem of suicidal risk in Italian prisons. Beginning with a general analysis of the concept and the sociological approaches to suicide, we analyze the main studies on suicide in Italian penal institutions. We present updated Italian prisoners suicide statistics (2002-2015), which we then analyze and discuss both in absolute numbers and in percentage terms. The results indicate that the situation is critical: suicide is the leading cause of death in Italian prisons. The problem mainly affects Italian elder prisoners, the weakest group for mental and physical health. The trend data for female detainees reveal that the ability to adapt to prison life appears more difficult than for male detainees. In addition, suicide among foreign detainees has risen in recent years; a probable contributing factor is the inability to use alternative measures such as house arrest. The conclusion attests a need to provide health policies with treatment options for the cure and care of prisoners in difficulty, with a total approach responding not only to the specific symptoms or to risk behaviors but also to the whole person in a holistic sense.
Experimental Assessment of the Battery Lifetime in WSN Based on the Duty-Cycle Current Average Method  [PDF]
Leonardo Barboni, Maurizio Valle
Wireless Sensor Network (WSN) , 2014, DOI: 10.4236/wsn.2014.610021
Abstract: A great amount of work addressed methods for predicting the battery lifetime in wireless sensor systems. In spite of these efforts, the reported experimental results demonstrate that the duty-cycle current average method, which is widely used to this aim, fails in accurately estimating the battery life time of most of the presented wireless sensor system applications. The aim of this paper is to experimentally assess the duty-cycle current average method in order to give more effective insight on the effectiveness of the method. An electronic metering system, based on a dedicated PCB, has been designed and developed to experimentally measure node current consumption profiles and charge extracted from the battery in two selected case studies. A battery lifetime measurement (during 30 days) has been carried out. Experimental results have been assessed and compared with estimations given by using the duty-cycle current average method. Based on the measurement results, we show that the assumptions on which the method is based do not hold in real operating cases. The rationality of the duty-cycle current average method needs reconsidering.
Proton Therapy Results in the Treatment of Hepatocellular Carcinoma According to the Barcelona-Clinic Liver Cancer (BCLC) Staging System  [PDF]
Francesco Dionisi, Maurizio Amichetti
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2015, DOI: 10.4236/ijmpcero.2015.42013
Abstract:
Proton therapy represents the most advanced form of radiotherapy currently available. Hepato-cellular carcinoma (HCC) has been extensively treated with proton therapy since 1983 with en-couraging results in terms of effectiveness and safety, as reported in recent research articles, systematic reviews and meta-analyses. In this report, we summarized for the first time the results of proton therapy treatment for HCC according with respect to the Barcelona Clinic Liver Cancer Staging System, the most adopted classification system for HCC which provides information on both prognostic prediction and treatment allocation.
Parenthood and the Wayana People  [PDF]
Maurizio Alì, Rodica Ailincai
Sociology Mind (SM) , 2016, DOI: 10.4236/sm.2016.63013
Abstract: This paper presents the first results obtained from an exploratory study which is conducted within the Amerindian Wayana communities who inhabit the Amazon sector of the High Maroni area, in French Guiana. Based on an ecological and interactionist approach and employing comprehensive methods to analyze observed facts (to bypass the nostalgic attitude fostering the paradigmatic anthropological dichotomy “tradition vs; modernity”), this study describes educational family practices among Wayana and analyses parents’ expectations visà-vis their children in the framework of the postcolonial dynamic, with the aim to understand the influence of the national public policies to diffuse certain domestic praxis. The ethnographic corpus is gathered during a long fieldwork and it is accompanied by seventeen semi-open interviews. The interpretative approach attempts to link the observed behaviours observed to contextual and cultural variables. Following the analysis of the data, the authors propose 1) a diagram of the structure of Wayana family kinship Microsystems (with a description and a diagram of the Wayana matrilineality scheme); 2) a description of roles and educational functions within their communities and, finally, 3) an overview of parental expectations interpreted taking into account the influences of contemporary inter-systemic interactions (and above all the dynamics generated by the recent introduction of compulsory schooling into the area).
Trans-Human and Post-Human: A Challenge for the Human and Philosophical Sciences  [PDF]
Marta Toraldo, Domenico Maurizio Toraldo
Open Journal of Philosophy (OJPP) , 2019, DOI: 10.4236/ojpp.2019.91005
Abstract: This paper describes the concept of scientific knowledge in both modern and post-modern society. It presents a brief analysis of how the value of scientific knowledge is changing in contemporary society and describes future developments linked to the new concept of trans-humanism. The term “post-human” refers to a progressive alteration of human characteristics by means of genetic and electronic manipulation that results in an anthropological mutation, which is a prelude to the advent of a new, and post-human species. The term “trans-human” means more than human, beyond human, transcending the limits of the human condition and aspiring to an almost divine superior meaning. This new modified condition of human beings is defined as post-human and the process of change is described within the cultural framework of humanism. Trans-humanism as a term refers to a philosophical doctrine belonging to the family of contemporary progressive ideologies in which trans-humanist intellectuals analyse and promote technologies aimed at overcoming the limits of human nature. Analyzing the trends, the anthropological implications and the cultural impact of such technologies, this new philosophical/scientific doctrine tends to emphasise the positive aspects of scientific development, but without underestimating the potential dangers arising from the misuse of technology. The open ethical challenge of trans-humanism is twofold: 1) the physical improvement of human beings with reference to the new trans-human concept of human nature; 2) the development of a trans-human being that can fulfil humanity’s dream of escaping the bonds of its condition, acquiring a “cybernetic nature” free from pain and suffering.
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