1,721,108 research outputs found
Heuristic Paths for Educational Work in Prison Libraries = Traiettorie euristiche per il lavoro educativo nelle biblioteche in carcere
Full text linkIl contributo intende presentare i primi risultati di una ricerca che si è posta l’obiettivo di indagare le potenzialità delle biblioteche in carcere, pensate come spazi privilegiati per la progettazione di interventi educativi finalizzati al supporto dei percorsi di inclusione a favore delle persone detenute.
Attraverso la raccolta e l’analisi di interviste biografiche a persone che hanno trascorso una parte della loro vita in carcere, al fine di raccogliere rappresentazioni, vissuti e pratiche per orientare l’agire educativo. Le biblioteche verranno guardate nel loro essere uno dei pochi spazi, in carcere, caratterizzati dalla possibilità di ospitare una collettività. Gli spazi collettivi, soprattutto in un’istituzione totale, sono fondamentali perché facilitano l'incontro tra i corpi, la condivisione delle esperienze e l'organizzazione; favoriscono le relazioni, la reciprocità, l'erotismo e la mutua protezione dagli episodi di violenza; permettono la relazione e l'incontro tra le persone detenute e con le persone non detenute, in momenti privilegiati di resistenza, fuori dall'isolamento istituzionalizzato.The contribution aims to present the initial results of a study that sought to investigate the potential of prison libraries, conceived as privileged space for designing educational interventions aimed at supporting inclusion pathways for incarcerated individuals. Through the collection and analysis of biographical interviews with people who have spent a portion of their lives in prison, the goal was to gather representations, experiences, and practices, to guide educational actions. Libraries are viewed as among the few spaces within prisons characterized by the capacity to host a community. Collective spaces, especially within a total institution, are crucial as they facilitate the encounter between bodies, the sharing of experiences, the strength to organize; they foster relationships, reciprocity, eroticism, and mutual protection against episodes of violence; they enable relationships and encounters between incarcerated individuals and non-incarcerated individuals, during privileged moments of resistance outside institutionalized isolation
Ontwikkeling van microfluïdische sensoren met additieve productie
Full text linkToday, additive manufacturing (AM) technology is well-known to everybody: each of us has, at least once, heard about that and many have already seen a 3D printer at work. In last years, the cost reduction of 3D printers has meant that AM was no longer used just for rapid prototyping but, also, for the manufacturing of many end-use products. Moreover, its benefits (the material efficiency, the possibility to produce complex shapes in very fast time and at low-cost,...), attracted also the scientists, leading them to use this technology in their research. Recently, 3D-printing made its appearance in the microwave field, and the number of papers presenting devices fabricated with this technology grows every year more.
It is within this scenario that my PhD thesis is contributing, being entirely dedicated to 3D-printing technology and its applications in the development of microwave devices. In particular, my work is focused on the realization of microfluidic devices based on resonant cavities. These cavities present a 3D-printed pipe inside, where liquids under test (LUT) can be injected and their properties extracted. Sensors with two different geometries have been analyzed. The first one consists in a square Substrate Integrated Waveguide (SIW) cavity with a multi-folded pipe inside. In the second structure, instead, the high quality factor of spherical-like shapes is exploited. A pumpkin-shaped cavity resonator is fabricated, with a pipe passing, straight, between the two poles.
One of the main advantages of AM fabrication is the possibility of emptying both structures, so to minimize as much as possible the dielectric losses due to the substrate. Moreover, the pumpkin structure, realized with a 2 mm-thick dielectric shell, was metallized in the inner part, thanks to electroplating. This guaranteed an increase in quality factor, especially if compared with the square structure. Both these structures were tested with nine different liquids, consisting of mixtures of water and isopropanol. To extract dielectric permittivity and loss tangent of the LUTs, the shift in the resonant frequency on one hand and the change of the quality factor on the other hand, have been considered. In particular, the procedure for the extraction of the dielectric permittivity has been improved, with respect to what can be read in literature, and also a novel method for the extraction of the loss tangent, were proposed.
The intention to create a self-sustained device for the retrieval of LUTs properties, was then pointed out. Such an investigation has culminated in the realization of an oscillator based on the aforementioned 3D-printed resonator. The design of the oscillator was performed in such a way to obtain an output signal with a working frequency similar to the resonator one and dependent on the LUT injected in the cavity. With a spectrum analyzer, the oscillation frequency was measured in different cases, and the permittivity of the different LUTs was obtained.status: Publishe
Thermodynamic Aspects of the Adsorption of Cytochrome c and Its Mutants on Kaolinite
No full textThe adsorption of native, wild-type and engineered cytochrome c on sodium-exchanged kaolinite was investigated by spectroscopic means. The variants of yeast cytochrome c were obtained replacing surface lysines in position 72, 73 and 79 with alanine residues. All proteins are strongly adsorbed onto kaolinite. In particular, the presence of the lysine residue in position 73 remarkably favors adsorption. A detailed characterization of the thermodynamic aspects of the adsorption process has been performed. Most notably, adsorbed cytochrome c maintains its moderate peroxidase activity against guaiacol. This investigation is prodromal to the exploitation of the catalytic activity of engineered cytochrome c immobilized on a polydisperse system
1H NMR of native and azide-inhibited laccase from Rhus vernicifera
No full textThe H NMR spectra of the fully oxidized Rhus vernicifera laccase and of its 1:1 and 2:1 azide adducts are reported for the first time.These spectra, which are the first so far reported for a multi copper oxidase, contain a number of broad hyperfine-shifted resonances in thehigh frequency region of the spectrum, which are attributed to the metal binding residues of the mononuclear T1 center. The differencesbetween the patterns of the hyperfine resonances of the free enzyme and its azide derivatives suggest that the alterations in the structuralproperties of the T3 site induced by the binding of the first azide molecule induce a limited alteration of the spin density distribution over1 the T1 copper ligands. Overall, these data demonstrate that H NMR can be fruitfully applied to characterize the electronic properties ofthe metal sites of blue oxidases at room temperature
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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