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Unitn-eprints PhD
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1211 Publications
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  • Sintering of Ceramic Materials Under Electric Field

    The remarkable discovery of flash sintering came across during the early work of Cologna et al. and emerged as an attractive technique in the field of ceramic processing. In this technique the applied electric field initiates the “flash” event, while the densification is controlled by the current density set. Sintering occurs in less than 5 s at a threshold temperature for a given applied field. The objective of this thesis is to analyse the phenomena of flash sintering with different cer...

    Organizational transparency: Stakeholder relationships and internal dynamics

    This study examines the notion of organizational transparency through the lenses of stakeholder theory and focuses on the interaction between management and internal stakeholders. A theory-driven measure of transparency is developed and dened along three dimensions: informative, participative, and accountable. Based on a unique data set consisting of six Italian social enterprises operating in the social service sector, we use a mixed-method approach in order to study both managerial po...

    Essays on the demand and supply of small business finance

    This PhD dissertation is a collection of four essays focusing on the demand and supply of small business finance in Kenya. The studies are the result of primary research conducted over three years with both demand-side players, more specifically micro and small-scale entrepreneurs operating in a low-income area in Nairobi. And the main suppliers of small businesses finance in Kenya - commercial banks - which provided data on the size, characteristics and evolution of their SME finance portfol...

    Optimal Codes and Entropy Extractors

    In this work we deal with both Coding Theory and Entropy Extraction for Random Number Generators to be used for cryptographic purposes. We start from a thorough analysis of known bounds on code parameters and a study of the properties of Hadamard codes. We find of particular interest the Griesmer bound, which is a strong result known to be true only for linear codes. We try to extend it to all codes, and we can determine many parameters for which the Griesmer bound is true also for nonlinear ...

    Silicon nanocrystals downshifting for photovoltaic applications

    In conventional silicon solar cell, the collection probability of light generated carries shows a drop in the high energy range 280-400nm. One of the methods to reduce this loss, is to implement nanometre sized semiconductors on top of a solar cell where high energy photons are absorbed and low energy photons are re-emitted. This effect, called luminescence down-shifter (LDS), modifies the incident solar spectrum producing an enhancement of the energy conversion efficiency of a cell. We in...
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