2,940 research outputs found
Corporate Social Responsibility and Firms Performance: an Analysis on Italian Listed Companies
Corporate social responsibility (CSR) is getting an increasingly important issue for economic agents all over the world, due to a new attention to all the aspects of firms activities and their relationships with stakeholders.
Also in Italy, the number of firms that prepare voluntary corporate social responsibility (CSR) reports (e.g. sustainability reports, environmental reports, environmental and social reports or corporate social responsibility reports) is increasing.
The purpose of this paper is to investigate the impact of the voluntary disclosure about Corporate Social Responsibility on firms stock prices of Italian listed companies in order to analyze if it can somehow contribute to increase the stock market prices.
Our empirical analysis will test the relation, during a period of three years, between corporate social responsibility (CSR) reports and firms stock prices, considering a sample of Italian listed companies.Corporate social responsibility (CSR) is getting an increasingly important issue for economic agents all over the world, due to a new attention to all the aspects of firms activities and their relationships with stakeholders.
Also in Italy, the number of firms that prepare voluntary corporate social responsibility (CSR) reports (e.g. sustainability reports, environmental reports, environmental and social reports or corporate social responsibility reports) is increasing.
The purpose of this paper is to investigate the impact of the voluntary disclosure about Corporate Social Responsibility on firms stock prices of Italian listed companies in order to analyze if it can somehow contribute to increase the stock market prices.
Our empirical analysis will test the relation, during a period of three years, between corporate social responsibility (CSR) reports and firms stock prices, considering a sample of Italian listed companies.Uninvited Submission
(Extra)ordinary equivalences with the ascending/descending sequence principle
We analyze the axiomatic strength of the following theorem due to Rival and
Sands in the style of reverse mathematics. "Every infinite partial order of
finite width contains an infinite chain such that every element of is
either comparable with no element of or with infinitely many elements of
." Our main results are the following. The Rival-Sands theorem for infinite
partial orders of arbitrary finite width is equivalent to over . For each fixed , the
Rival-Sands theorem for infinite partial orders of width is
equivalent to over . The Rival-Sands theorem for
infinite partial orders that are decomposable into the union of two chains is
equivalent to over . Here
denotes the recursive comprehension axiomatic system,
denotes the induction scheme, denotes the
ascending/descending sequence principle, and denotes the stable
ascending/descending sequence principle. To our knowledge, these versions of
the Rival-Sands theorem for partial orders are the first examples of theorems
from the general mathematics literature whose strength is exactly characterized
by , by , and by
. Furthermore, we give a new purely combinatorial result by
extending the Rival-Sands theorem to infinite partial orders that do not have
infinite antichains, and we show that this extension is equivalent to
arithmetical comprehension over
Carrier density dependence of 1/f noise in graphene explained as a result of the interplay between band-structure and inhomogeneities
http://www.gianlucafiori.org/articles/jstat_noise.pdf
We present a model for 1/f noise in graphene based on an analysis of the effect of charge trapping and detrapping events on the fluctuations of the number of charge carriers. Inclusion of a Gaussian distribution of fluctuations of the electrostatic potential enables us to reproduce all the various experimentally observed behaviors of the flicker noise power spectral density as a function of carrier density, both for monolayer and bilayer graphene. The key feature of a flicker noise minimum at the Dirac point that appears in bilayer graphene and sometimes also in monolayer graphene is explained in terms of the disappearance, when the number of electrons equals that of holes, of the carrier number fluctuations induced by trapping events. Such a disappearance is analyzed with two different approaches, in order to gain a better understanding of the physical origin of the effect, and to make some considerations about possible analogous phenomena in other semiconductors
Mixed Hepatoblastoma in a Young Male Adult: A Case Report and Literature Review
Hepatoblastoma (HB) is a rare malignant tumour of the liver and usually occurs in the first three years of life. Most of these tumours arise in the embryo; hence it seems to be unusual that hepatoblastoma occurs in adults and is an exceptional cause of primary malignant liver tumour in adult patients. The diagnosis is often overlooked, and patients might be diagnosed at late stages of the disease at risk of increased mortality. In this paper we report a case of a 30-year-old man with mixed hepatoblastoma and abdominal pain, hepatomegaly and fever. The patient under went noninvasive diagnostic methods: duplex scanning, Computed Tomography (CT), and Magnetic Resonance imaging (MRI). In our experience, despite the important role of histological sample provided by biopsy in defining the diagnosis, very important was the role of MRI, more than ultrasonography and enhanced CT. The MRI detects tumor features as size, margins, and ratio with neighboring organs in order to get the best surgical approach
Unbalance between Excitation and Inhibition in Phenylketonuria, a Genetic Metabolic Disease Associated with Autism
Phenylketonuria (PKU) is the most common genetic metabolic disease with a well-documented association with autism spectrum disorders. It is characterized by the deficiency of the phenylalanine hydroxylase activity, causing plasmatic hyperphenylalaninemia and variable neurological and cognitive impairments. Among the potential pathophysiological mechanisms implicated in autism spectrum disorders is the excitation/inhibition (E/I) imbalance which might result from alterations in excitatory/inhibitory synapse development, synaptic transmission and plasticity, downstream signalling pathways, and intrinsic neuronal excitability. Here, we investigated functional and molecular alterations in the prefrontal cortex (pFC) of BTBR-Pah(enu2) (ENU2) mice, the animal model of PKU. Our data show higher frequency of inhibitory transmissions and significant reduced frequency of excitatory transmissions in the PKU-affected mice in comparison to wild type. Moreover, in the pFC of ENU2 mice, we reported higher levels of the post-synaptic cell-adhesion proteins neuroligin1 and 2. Altogether, our data point toward an imbalance in the E/I neurotransmission favouring inhibition in the pFC of ENU2 mice, along with alterations of the molecular components involved in the organization of cortical synapse. In addition to being the first evidence of E/I imbalance within cortical areas of a mouse model of PKU, our study provides further evidence of E/I imbalance in animal models of pathology associated with autism spectrum disorders
Electronically ordered ultrathin Cr2O3 on Pt(1 1 1) in presence of a multidomain graphene intralayer
In the last decade, reducing the dimensionality of materials to few atomic layers thickness has allowed exploring new physical properties and functionalities otherwise absent out of the two dimensional limit. In this regime, interfaces and interlayers play a crucial role. Here, we investigate their influence on the electronic properties and structural quality of ultrathin Cr2O3 on Pt(111), in presence of a multidomain graphene intralayer. Specifically, by combining Low-Energy Electron Diffraction, X-ray Photoelectron Spectroscopy and X-ray Absorption Spectroscopy, we confirm the growth of high-quality ultrathin Cr2O3 on bare Pt, with sharp surface reconstructions, proper stoichiometry and good electronic quality. Once a multidomain graphene intralayer is included at the metal/oxide interface, the Cr2O3 maintained its correct stoichiometry and a comparable electronic quality, even at the very first monolayers, despite the partially lost of the morphological long-range order. These results show how ultrathin Cr2O3 films are slightly affected by the interfacial epitaxial quality from the electronic point of view, making them potential candidates for graphene-integrated heterostructures
A New automatic system of cell colony counting
The counting process of cell colonies is always a long
and laborious process that is dependent on the judgment and ability
of the operator. The judgment of the operator in counting can vary in
relation to fatigue. Moreover, since this activity is time consuming it
can limit the usable number of dishes for each experiment. For these
purposes, it is necessary that an automatic system of cell colony
counting is used. This article introduces a new automatic system of
counting based on the elaboration of the digital images of cellular
colonies grown on petri dishes. This system is mainly based on the
algorithms of region-growing for the recognition of the regions of
interest (ROI) in the image and a Sanger neural net for the
characterization of such regions. The better final classification is
supplied from a Feed-Forward Neural Net (FF-NN) and confronted
with the K-Nearest Neighbour (K-NN) and a Linear Discriminative
Function (LDF). The preliminary results are shown
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