123 research outputs found
La pianificazione d'area vasta in alcuni contesti territoriali e regionali: la Sardegna
No full textL'articolo esamina gli approcci utilizzati nella pianificazione provinciale in SardegnaIn the article the author examines the approaches in some regional planning Sardinian experience
Growth, structure, and electronic properties in organic thin films deposited on metal surfaces investigated by low energy electron microscopy and photoelectron emission microscopy
No full textNanoscale order and structure in organic materials Diindenoperylene on gold as a model system
No full textTo Spike or Not To Spike: A Digital Hardware Perspective on Deep Learning Acceleration
No full textAs deep learning models scale, they become increasingly competitive from domains spanning from computer vision to natural language processing; however, this happens at the expense of efficiency since they require increasingly more memory and computing power. The power efficiency of the biological brain outperforms any large-scale deep learning (DL) model; thus, neuromorphic computing tries to mimic the brain operations, such as spike-based information processing, to improve the efficiency of DL models. Despite the benefits of the brain, such as efficient information transmission, dense neuronal interconnects, and the co-location of computation and memory, the available biological substrate has severely constrained the evolution of biological brains. Electronic hardware does not have the same constraints; therefore, while modeling spiking neural networks (SNNs) might uncover one piece of the puzzle, the design of efficient hardware backends for SNNs needs further investigation, potentially taking inspiration from the available work done on the artificial neural networks (ANNs) side. As such, when is it wise to look at the brain while designing new hardware, and when should it be ignored? To answer this question, we quantitatively compare the digital hardware acceleration techniques and platforms of ANNs and SNNs. As a result, we provide the following insights: (i) ANNs currently process static data more efficiently, (ii) applications targeting data produced by neuromorphic sensors, such as event-based cameras and silicon cochleas, need more investigation since the behavior of these sensors might naturally fit the SNN paradigm, and (iii) hybrid approaches combining SNNs and ANNs might lead to the best solutions and should be investigated further at the hardware level, accounting for both efficiency and loss optimization
O Enigma do Mal: uma leitura do 'De casu diaboli'de Santo Anselmo
No full textO presente artigo quer investigar o problema do mal na perspectiva de Santo Anselmo, tomando como ponto de partida sua obra De casu diaboli, onde o tema é abordado, a partir da íntima ligação entre mal e pecado. Ao enfocar o mal na perspectiva da queda diabólica, o Doutor Magnífico intenta mostrar a conexão entre vontade, liberdade e justiça. Sua preocupação é investigar o significado moral da má escolha, realizada por uma criatura racional e puramente espiritual, feita boa e para ser boa. O pecado, consoante o autor, não está em almejar a felicidade, pois tal desejo é dádiva divina; o mal praticado pelo anjo está, precisamente, em querer a felicidade fora da justiça, isto é, ao querer ser feliz, ele foi de encontro ao que ele deveria ser: quis ser semelhante a Deus, extrapolando a sua própria natureza, pois ele desejou algo que, enquanto criatura, não caberia a ele almejar. Este é o ponto de partida para analisar o mal e sua mais dramática consequência, o sofrimento.Palavras-chave: Mal. Vontade. Justiça. Anselmo. AbstractThis article aims to investigate the problem of evil in Saint Anselm, especially in his treatise De casu diaboli. He approaches this issue from the close connection between evil and sin. Upon analyzing evil from the diabolic fall perspective, Dr. Magnificent tries to establish a connection between will, freedom and justice. This text investigates the moral meaning of misconduct, carried out by a rational and purely spiritual creature that was created good and meant to be good. Seeking for happiness is not itself a sin, according to the author, for such a wish is a gift from God. The evil done by the angel lies in the act of wanting happiness without justice, that is, on wanting to be happy, the angel contradicted what he was supposed to be: he wanted to be like God, transcending his own nature, as he wished for something that, as a creature, he was not fit to wish for. This is the starting point to analyze evil and its most dramatic consequence: suffering.Key-words: Evil. Will. Justice. Anselm.
Nuclear Magnetic Resonance of 129Xe and 1H as a probe for the characterization of void space in human myoglobin isoforms in solution
No full textNanoscale Studies of Organic Radicals: Surface, Interface, and Spinterface
No full textConspectusIn the last
decade technology has brought significant changes to our lives, including
new habits and a new view on social relationships. These technological
innovations are based on several factors, one of which is miniaturization.
This was made possible also due to the discovery and synthesis of
new materials with characteristics at the nanoscale that are designed
for specific purposes. This “on purpose” approach, joined
to the development of preparation and growth methods, has led to use
of thin films rather than bulk materials in devices. Using thin films
makes devices easier to produce, and using films for coating protects
the devices and gives specific properties to surfaces. For several
decades thin films, surfaces, and interfaces have been intensively
investigated. Indeed, device performances rely on the optimized match
of thin films of different natures, such as organic and inorganic
semiconductors and metals for contacts. Surprisingly, in comparison,
little attention has been devoted to the deposition of organic radicals
on a substrate. This might be because these materials are considered
not stable enough for evaporation.In this work, we demonstrate
that it is possible to evaporate and deposit organic radicals onto
well-defined surfaces under controlled conditions, without degradation.
Using soft X-ray spectroscopies, performed also at synchrotrons, we
investigate thin film processes, surfaces, and interfaces at the nanoscale,
when organic radicals are deposited on metal and metal oxide surfaces.
We suggest how to design organic radicals bearing in mind the thermodynamic
factors that govern thin film stability, with the purpose of obtaining
not only a chemically stable radical, but also stable thin films.
We investigate the thermal and air stability of the deposited films,
and we explore the influence of the surface/radical chemical bond
and the role of surface defects on the magnetic moment at the interface.
We find that organic radicals are physisorbed and keep their magnetic
moment on inert and passivated surfaces such as Au(111) and Al2O3(112̅0) single crystals, SiO2, and ideal TiO2(110) single crystals, while defective
sites such as oxygen vacancies or the presence of OH groups lead to
chemisorption of the organic radicals on the surface with quenching
of their magnetic moment. Our work shows that the use of X-ray based
techniques represents a powerful approach to reveal the mechanisms
governing complex interfaces, such as radical/metal and radical/metal-oxide,
where it is important to describe both charge and spin behavior (spinterfaces).
It also makes it possible to conceive new experiments to investigate
the magnetic character of the thin films versus their structural properties,
toward tuning the arrangement of the molecules in films. Controlling
the molecular arrangement will give the opportunity to tune the mutual
position and orientation of the molecules, that is, of the single
magnetic moments in the films, “imprinting” their magnetic
properties. A deep understanding of stable radical/inorganic spinterfaces
may open the way to use radicals in solid state devices or as quantum
bits with dedicated configurations, as proposed for other molecular
quantum bits, and in spin-based electronics
O Enigma do Mal: uma leitura do 'De casu diaboli'de Santo Anselmo
No full textThis article aims to investigate the problem of evil in Saint Anselm, especially in his treatise De casu diaboli. He approaches this issue from the close connection between evil and sin. Upon analyzing evil from the diabolic fall perspective, Dr. Magnificent tries to establish a connection between will, freedom and justice. This text investigates the moral meaning of misconduct, carried out by a rational and purely spiritual creature that was created good and meant to be good. Seeking for happiness is not itself a sin, according to the author, for such a wish is a gift from God. The evil done by the angel lies in the act of wanting happiness without justice, that is, on wanting to be happy, the angel contradicted what he was supposed to be: he wanted to be like God, transcending his own nature, as he wished for something that, as a creature, he was not fit to wish for. This is the starting point to analyze evil and its most dramatic consequence: suffering.O presente artigo quer investigar o problema do mal na perspectiva de Santo Anselmo, tomando como ponto de partida sua obra De casu diaboli, onde o tema é abordado, a partir da íntima ligação entre mal e pecado. Ao enfocar o mal na perspectiva da queda diabólica, o Doutor Magnífico intenta mostrar a conexão entre vontade, liberdade e justiça. Sua preocupação é investigar o significado moral da má escolha, realizada por uma criatura racional e puramente espiritual, feita boa e para ser boa. O pecado, consoante o autor, não está em almejar a felicidade, pois tal desejo é dádiva divina; o mal praticado pelo anjo está, precisamente, em querer a felicidade fora da justiça, isto é, ao querer ser feliz, ele foi de encontro ao que ele deveria ser: quis ser semelhante a Deus, extrapolando a sua própria natureza, pois ele desejou algo que, enquanto criatura, não caberia a ele almejar. Este é o ponto de partida para analisar o mal e sua mais dramática consequência, o sofrimento. Palavras-chave: Mal. Vontade. Justiça. Anselmo.
Correction to: Outcomes on safety and efficacy of left atrial appendage occlusion in end stage renal disease patients undergoing dialysis (Journal of Nephrology, (2021), 34, 1, (63-73), 10.1007/s40620-020-00774-5)
No full textThe article Outcomes on safety and efficacy of left atrial appendage occlusion in end stage renal disease patients undergoing dialysis, written by Simonetta Genovesi, Luca Porcu, Giorgio Slaviero, Gavino Casu, Silvio Bertoli, Antonio Sagone, Monique Buskermolen, Federico Pieruzzi, Giovanni Rovaris, Alberto Montoli, Jacopo Oreglia, Emanuela Piccaluga, Giulio Molon, Mario Gaggiotti, Federica Ettori, Achille Gaspardone, Roberto Palumbo, Francesca Viazzi, Marco Breschi, Maurizio Gallieni, Gina Contaldo, Giuseppe D’Angelo, Pierluigi Merella, Fabio Galli, Paola Rebora, Mariagrazia Valsecchi, and Patrizio Mazzone, was originally published electronically on the publisher’s internet portal on 6 June 2020 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 10 July 2020 to © The Author(s) 2020 and this article is licensed under a Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/ by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The original article has been updated
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