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Search Results: 1 - 10 of 13126 matches for " Debora Di Gioacchino "
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Parental Care, Children’s Cognitive Abilities and Economic Growth: The Role of Fathers  [PDF]
Debora Di Gioacchino
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.23046
Abstract: Human capital is a key determinant of economic growth. Parents’ involvement during childhood is a predictor of educational attainment later in life. Thus, time devoted by parents to childcare is an important productive activity for society. This paper presents a model in which parental childcare is a key factor in determining children’s cognitive abilities. Parents’ must allocate their time between paid job and childcare. Because of diminishing return, the optimal allocation of parents’ time requires both parents to spend some time in childcare. Since a suboptimal allocation of time has implications both for children's cognitive abilities and for economic growth, our result has important policy implications.
Tax Compliance, Income Distribution and Social Norms  [PDF]
Debora Di Gioacchino, Fabrizio Patriarca
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.73044
Abstract: This paper studies the effect of income inequality on tax evasion. To discuss the topic, we present a simple model, based on Benabouand Tirole [1], that incorporates incentives for tax compliance such as punishment and fines, intrinsic motivation and social norms. Since we consider a regressive system of incentives to comply, income inequality increases the value of tax evasion although overall propensity to comply is unaffected. In this framework, we consider the hypothesis that social norms are group specific as in the case of social segregation or status related networks. We show that all the negative effects of inequalities are amplified: the difference between the tax compliance of the income groups and the value of tax evasion increase.
Magnetic and transport properties of PdH: intriguing superconductive observations
Tripodi, Paolo;Di Gioacchino, Daniele;Vinko, Jenny Darja;
Brazilian Journal of Physics , 2004, DOI: 10.1590/S0103-97332004000600007
Abstract: since the discovery of superconductivity in palladium-hydrogen (pdh) and its isotopes (d,t) at low temperature, several efforts have been made to study the properties of this system. superconductivity of pdh system has been initially claimed by resistance drop versus temperature and then confi rmed by dc magnetic susceptibility measurements. these studies have shown that the critical transition temperature is a function of the hydrogen concentration x in the pdhx system. in all these experiments, the highest concentration x of hydrogen in palladium was lower than the unit. in the last decade we defi ned a room temperature and room pressure technique to load hydrogen and its isotopes into palladium at levels higher than unit, using electrochemical set-up, followed by a stabilization process to maintain the hydrogen concentration in palladium lattice stable. in the meanwhile, several measurements of resistance versus temperature have been performed. these measurements have shown several resistive drops in the range of [18k
Evidence for Irradiation Triggered Nonuniform Defect Distribution In Multiharmonic Magnetic Susceptibility of Neutron Irradiated YBa2Cu3O7-x
V. Sandu,S. Popa,D. Di Gioacchino,P. Tripodi
Physics , 2005, DOI: 10.1007/s10948-005-0040-z
Abstract: Multiharmonic ac-magnetic susceptibility \ch11,\chi2,chi3, of neutron irradiated Li-doped YBa2Cu3O7-x has revealed a nonmonotonic dependence of all harmonics on the neutron fluence. The irradiation has a strongly depressive influence on the intergrain connection suggesting an increase of the effective thickness of the intergranular Josephson junction at aneutron fluence of 0.98x10$^{17}$ cm$_{-2}$. Less damaged are the intragrain properties. A spectacular enhancement of the superconducting intragranular properties reflected in the characteristics of all harmonics was observed at highest fluence \Phi = 9.98x10$^{17}$ cm$_{-2}$. We assume that this effect results from the development of a space inhomogeneous distribution with alternating defectless and defect rich regions.
The AC multi-harmonic magnetic susceptibility measurement setup at the LNF-INFN
Shenghao Wang,Augusto Marcelli,Daniele Di Gioacchino,Ziyu Wu
Physics , 2014, DOI: 10.4028/www.scientific.net/AMM.568-570.82.
Abstract: The AC magnetic susceptibility is a fundamental method in materials science, which allows to probe the dynamic magnetic response of magnetic materials and superconductors. The LAMPS laboratory at the Laboratori Nazionali di Frascati of the INFN hosts an AC multi-harmonic magnetometer that allows performing experiments with an AC magnetic field ranging from 0.1 to 20 Gauss and in the frequency range from 17 to 2070 Hz. A DC magnetic field from 0 to 8 T produced by a superconducting magnet can be applied, while data may be collected in the temperature range 4.2-300 K using a liquid He cryostat under different temperature cycles setups. The first seven AC magnetic multi-harmonic susceptibility components can be measured with a magnetic sensitivity of 1x10-6 emu and a temperature precision of 0.01 K. Here we will describe in detail about schematic of the magnetometer, special attention will be dedicated to the instruments control, data acquisition framework and the user-friendly LabVIEW-based software platform.
Investigation of Tinnitus Patients in Italy: Clinical and Audiological Characteristics
Francesco Martines,Daniela Bentivegna,Fabiola Di Piazza,Enrico Martines,Vincenzo Sciacca,Gioacchino Martinciglio
International Journal of Otolaryngology , 2010, DOI: 10.1155/2010/265861
Abstract: Objective. 312 tinnitus sufferers were studied in order to analyze: the clinical characteristics of tinnitus; the presence of tinnitus-age correlation and tinnitus-hearing loss correlation; the impact of tinnitus on subjects' life and where possible the etiological/predisposing factors of tinnitus. Results. There is a slight predominance of males. The highest percentage of tinnitus results in the decades 61–70. Of the tinnitus sufferers, 197 (63.14%) have a hearing deficit (light hearing loss in 37.18% of cases). The hearing impairment results of sensorineural type in 74.62% and limited to the high frequencies in 58.50%. The tinnitus is referred as unilateral in 59.93%, a pure tone in 66.99% and 10 dB above the hearing threshold in 37.7%. It is limited to high frequencies in 72.10% of the patients with sensorineural hearing loss (SNHL) while the 88.37% of the patients with high-frequency SNHL have a high-pitched tinnitus (2=66.26;<.005). Conclusion. Hearing status and age represent the principal tinnitus related factors; there is a statistically significant association between high-pitched tinnitus and high-frequency SNHL. There is no significant correlation between tinnitus severity and tinnitus loudness confirming the possibility that neural connection involved in evoking tinnitus-related negative reactions are governed by conditioned reflexes.
Limiting Severe Outcomes and Impact on Intensive Care Units of Moderate-Intermediate 2009 Pandemic Influenza: Role of Infectious Diseases Units
Sergio Carbonara, Giuseppe Bruno, Giuseppe Di Ciaula, Anna Donata Pantaleo, Gioacchino Angarano, Laura Monno
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0042940
Abstract: Purpose The rate of severe outcomes of patients with 2009 pandemic (A/H1N1) influenza (2009pI) hospitalized in non-intensive care units (ICUs) has not been defined thus far. This study aims to assess the efficacy of the management of patients with influenza-like illness (ILI) of moderate intermediate severity in an infectious diseases unit (IDU) during the first wave of 2009pI and its influence on the burden of ICUs. Methods All patients hospitalized from October 27, 2009, to February 5, 2010, with ILI were included in this prospective observational study. The IDU was organized and the staff was trained to provide intermediate care; patients were transferred to the ICU only if they required invasive ventilation, extracorporeal membrane oxygenation, or advanced cardiovascular support. Demographic data, clinical presentation, coexisting medical conditions, and laboratory and radiological findings were recorded and analyzed, as well as treatment and outcome data. Results Overall, 108 patients (median age 36 years [IQR 27–54], 57.4% males) including 66.7% with ≥1 risk factor for severe influenza, 47.2% with confirmed 2009pI by RT-PCR and 63.9% with pneumonia, were enrolled in the study. All subjects received intravenous fluids and 83.3% were administered oseltamivir, 96.3% antibacterials, 19.4% oxygen therapy without ventilatory support, and 10.2% non-invasive ventilation. A total of 106 (98.1%) subjects were discharged after a 6-day median hospital stay [IQR 4–9]. Two patients (1.9%) were transferred to the ICU. There were no deaths. Conclusions These results suggest that the aggressive treatment of patients with moderate intermediate severity 2009 pandemic ILI in non-ICU wards may result in a low rate of severe outcomes and brief hospitalization. IDUs, if properly organized for intermediate care, may efficiently provide correct disease management, in addition to complying with infection control requirements, thus reducing the burden of the pandemic on ICUs. Further studies are warranted to evaluate the outcome of patients with moderate intermediate 2009pI in different non-ICU settings.
Investigation of Tinnitus Patients in Italy: Clinical and Audiological Characteristics
Francesco Martines,Daniela Bentivegna,Fabiola Di Piazza,Enrico Martines,Vincenzo Sciacca,Gioacchino Martinciglio
International Journal of Otolaryngology , 2010, DOI: 10.1155/2010/265861
Abstract: Objective. 312 tinnitus sufferers were studied in order to analyze: the clinical characteristics of tinnitus; the presence of tinnitus-age correlation and tinnitus-hearing loss correlation; the impact of tinnitus on subjects' life and where possible the etiological/predisposing factors of tinnitus. Results. There is a slight predominance of males. The highest percentage of tinnitus results in the decades 61–70. Of the tinnitus sufferers, 197 (63.14%) have a hearing deficit (light hearing loss in 37.18% of cases). The hearing impairment results of sensorineural type in 74.62% and limited to the high frequencies in 58.50%. The tinnitus is referred as unilateral in 59.93%, a pure tone in 66.99% and 10 dB above the hearing threshold in 37.7%. It is limited to high frequencies in 72.10% of the patients with sensorineural hearing loss (SNHL) while the 88.37% of the patients with high-frequency SNHL have a high-pitched tinnitus ( ). Conclusion. Hearing status and age represent the principal tinnitus related factors; there is a statistically significant association between high-pitched tinnitus and high-frequency SNHL. There is no significant correlation between tinnitus severity and tinnitus loudness confirming the possibility that neural connection involved in evoking tinnitus-related negative reactions are governed by conditioned reflexes. 1. Introduction Tinnitus is an auditory phantom sensation, a “perception of a sound which results exclusively from activity within the nervous system without any corresponding mechanical, vibratory activity within the cochlea” with high prevalence rates in western societies [1–7]. Epidemiological studies showed that about one third of the population experiences tinnitus at least once in their life and about 1–5% develop serious psychosocial complications; in Italy an epidemiologic study based on questions to general population upon auditory dysfunctions evidenced a tinnitus prevalence percentage in 14.5% (8% in normal hearing subjects, 30.5% in presence of auditory dysfunctions) [8] while Girard et al., as reported by Deshaies et al., found a prevalence percentage of 5.2% in 41631 Canadians [9]. It was estimated that in Germany ~1.5 million, corresponding to 1.82% of population, have problems with tinnitus and 800.000, and 0.97% of the population, suffer so severely that they are in continuous medical treatment [10]. Persistent tinnitus may rapidly become a source of serious disturbance and handicap at psychological and socio-professional levels; in fact in 1–3% of the general population, the tinnitus affect the quality of
Flux dynamics in NdO1-xFxFeAs bulk sample
D. Di Gioacchino,A. Marcelli,S. Zhang,M. Fratini,N. Poccia,A. Ricci,A. Bianconi
Physics , 2009,
Abstract: We present data of multi harmonic magneto-dynamic experiments. In particular, we performed ac magnetic susceptibility experiments on layered pnictide-oxide quaternary compound NdOFeAs doped with fluorine. The experiments allow measure the critical temperature and probe the flux dynamic behavior using the third harmonic component of the ac susceptibility of a NdF0.16FeAsO0.84 bulk sample as a function of temperature and frequency of the applied ac magnetic fields. Measured signals are connected with the non-linear superconducting flux dynamic behavior and are characterized by a flux critical states sustaining a superconducting critical current. In this framework the irreversibility line that describes the stable superconducting state has been extracted from the onset of the third harmonic signal vs. frequency. Finally we present also the analysis of the flux dynamic dimensionality in the investigated sample.
X-ray absorption spectroscopy characterization of iron-oxide nanoparticles synthesized by high temperature plasma processing
C. Balasubramanian,B. Joseph,P. Gupta,N. L. Saini,S. Mukherjee,D. Di Gioacchino,A. Marcelli
Physics , 2014,
Abstract: Iron-oxide nanoparticles have been synthesized by high temperature arc plasma route with different plasma currents and characterized for their structure, morphology and local atomic order. Fe K-edge x-ray absorption spectra reveal distinct local structure of the samples grown with different plasma currents. We have shown that the local disorder is higher for the higher plasma current grown samples that also have a larger average particle-size. The results provide useful information to control structural and morphological properties of nanoparticles grown by high temperature plasma synthesis process.
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