1,830 research outputs found
Pseudo conditional maximum likelihood estimation of the dynamic logit model for binary panel data
No full textSchermi. Immagini, corpi, condivisioni
No full textIn this book the author investigates the digital image proliferation of our times from an interdisciplinary point of view. Starting from the Visual Culture theoretical frame, Valentina Mignano explores the ways in which we interact with the screen, dealing with the "screen experience" in the first years of the network societ
Testing for State Dependence in Binary Panel Data with Individual Covariates by a Modified Quadratic Exponential Model
No full textAlimenta. Progetto di accesso al cibo per / Access to food action
No full textIl progetto promuove nuovi modelli di benessere e di accesso al cibo per persone in condizione di grave marginalità e senza dimora ospiti dei dormitori pubblici della città di Torino / This project promotes new models of welfare and access to food for people in seriously marginal living conditions and homeless guests of the Turin city shelter. Alimenta è a cura del Dipartimento di Architettura e Design del Politecnico di Torino (architetto Cristian Campagnaro) e del Dipartimento di Filosofia e Scienze dell'Educazione dell'Università degli Studi di Torino (antropologa Valentina Porcellana). Alimenta è sostenuto da Fondazione Progetto Arca Onlus, Compagnia di Sanpaolo, Comitato Promotore S-nodi Gabriele Nigro, in collaborazione con il Servizio Adulti in Difficoltà del Comune di Torino, la Cooperativa Sociale Animazione Valdocco, Cooperativa P.G. Frassati. Stranaidea Impresa Sociale Onlus, il Forum Interregionale Permanente del Volontariato Piemonte e Valle d'Aosta e il Banco Alimentar
Swelling of responsive-microgels: experiments versus models
No full textInterpenetrated Polymer Network (IPN) microgels of PNIPAM and PAAc have been investigated and the experimental data have been compared with theoretical models from the Flory–Rehner theory. We confirm that the swelling behavior of PNIPAM microgels is well described by this theory by considering the second order approximation for the volume fraction φ dependence of the Flory parameter χ(φ). Indeed the Volume-Phase Transition (VPT) of the PNIPAM-PAAc IPN microgel at neutral conditions and in D2O solvents can be well described only considering a third-order approximation. Interestingly we empirically find that sharper is the transition higher is the order of the χ(φ) relation which has to be considered. Moreover the VPT can be experimentally controlled by tuning the polymer/solvent interactions through pH and solvent allowing to directly modify the delicate balance between energetic and entropic contributions and to explore the swelling behavior in a wide range of environmental conditions. In particular we find that the most advantageous condition for swelling is in water at acidic pH
Evaluating the Conservation State of Naturally Aged Paper with Raman and Luminescence Spectral Mapping: Toward a Non-Destructive Diagnostic Protocol
No full textMicro-Raman and luminescence spectroscopy were combined with morphological analysis to study the conservation state of differently degraded paper samples, dated from 1873 to 2021. The aim of the work reported in this paper was to obtain ageing markers based on variations of Raman and fluorescence spectral features. Raman and luminescence spectra were acquired by scanning non-printed areas of books, and Raman and fluorescence maps were built by contrasting spectral parameters point by point, obtaining a micron-scale space resolved imaging of the degradation pattern. Complementary information on paper morphology and surface compactness were obtained by high-resolution scanning electron and atomic force microscopy. The proposed non-destructive procedure is particularly interesting for precious and ancient samples to analyze their degradation processes and to evaluate the performance and effectiveness of restoration treatments
ENTREPRENEURSHIP AND FEMALE ENTREPRENEURSHIP IN MARAMURES COUNTY
No full textInitiating and developing a business involves a considerable risk and a sustained effort in order to defeat the inertia against what is new. The person initiating a business, assuming the responsibility and risk of its development and benefiting from theentrepreneurship, female entrepreneurship, profit, businesses
Interpenetrating Polymer Network Microgels in Water: Effect of Composition on the Structural Properties and Electrosteric Interactions
No full text: Microgels of cross-linked interpenetrating polymer networks (IPNs) are very versatile systems combining the properties of colloids and polymers. Herein we study IPN microgels composed of poly(N-isopropylacrylamide) and poly(acrylic acid) to understand how weight composition and reactant concentrations affect their structural, conformational and electrosteric properties in water. The results show that it is possible to drive the formation of microgels with the desired properties by adjusting IPN composition and preparation method during the synthesis. During synthesis, the polymerization of acrylic acid triggers the merging among IPNs via covalent linking, giving rise to microgels with larger mass and size, the effect being larger for higher concentration of the reactants. In addition, a close relation between the microgel internal conformation and the colloidal stability is observed, due to the presence of screened groups inside the microgel
The use of initial tocolysis and maintenance tocolysis in preterm birth : guideline-based approach or off-label use - a survey on the current application in Switzerland
No full textAuthor Valentina Schedl, BscMasterarbeit Universität Linz 202
- …
