329 research outputs found
Ab-initio Phonon Calculations for the layered compound TiOCl
We present first-principles frozen-phonon calculations for the three
Raman-active modes in the spin-1/2 layered TiOCl system within two
different well-known approaches: the local density approximation (LDA) and the
so-called LDA+U approximation. We observe that the inclusion of electron
correlation in a mean-field level as implemented in the LDA+U leads to a better
overall agreement with experimental results. We also discuss the implications
of the two approaches on the physics of TiOCl.Comment: Phys. Rev. B (Rapid Comm.) (in Press
Family money, relational life and (class) relative wealth:an empirical analysis on life satisfaction of secondary school students
We investigate factors affecting happiness on a sample of Italian secondary school students. We find that money matters since familyĂs house ownership, mortgages and (class) relative wealth significantly affect life satisfaction. Other crucial factors are geographical residence (those living in Milan are significantly less happy), motherĂs occupation, trust on family and friendships. Even though we cannot rule out inverse causality and other forms of endogeneity, the characteristics of many of the significant regressors such as family wealth, parental job and geographical residence (not under the decisional power of the student)suggest a direct causality nexus for these factors.life satisfaction, secondary school, wealth
Family money, relational life and (class) relative wealth: an empirical analysis on life satisfaction of secondary school students
We investigate factors affecting happiness on a sample of Italian secondary school students. We find that money matters since familyâs house ownership, mortgages and (class) relative wealth significantly affect life satisfaction. Other crucial factors are geographical residence (those living in Milan are significantly less happy), motherâs occupation, trust on family and friendships. Even though we cannot rule out inverse causality and other forms of endogeneity, the characteristics of many of the significant regressors such as family wealth, parental job and geographical residence (not under the decisional power of the student) suggest a direct causality nexus for these factors.life satisfaction; secondary school; wealth
Effects of Fe substitution on the electronic, transport, and magnetic properties of ZnGaO: A systematic ab-initio study
We present a density functional study of Fe doped into the tetrahedral and
octahedral cation sites of the wide band gap spinel ZnGaO.
We calculate the electronic structure for different substitutions and discuss
the magnetic and transport properties for each case considering different
approximations for the exchange-correlation potential. We show that for certain
doped cases, significant differences in the predicted behavior are obtained
depending on the exchange correlation potential adopted. Possible applications
of the doped systems as magnetic semiconductors are outlined.Comment: 9 pages, 8 figures; to be published in Phys. Rev.
Virtuous interactions in removing exclusion
We devise a retrospective panel data approach to evaluate the effects of fair trade affiliation on the schooling decisions of a sample of Thai organic rice producers across the past 20 years. We find that the probability of school enrolment in families with more than two children is significantly affected by affiliation years. The finding is robust when dealing with endogeneity and heterogeneity issues in the estimate. The nonpositive preaffiliation performance documents that our result is not affected by selection bias and that fair trade affiliation generates a significant break in the schooling decisions of affiliated households.child schooling; market access; fair trade
Virtuous interactions in removing exclusion: The link between foreign market access and access to education
We devise a retrospective panel data approach to evaluate the effects of fair trade affiliation on the schooling decisions of a sample of Thai organic rice producers across the past 20 years. We find that the probability of school enrolment in families with more than two children is significantly affected by affiliation years. The finding is robust when dealing with endogeneity and heterogeneity issues in the estimate. The non-positive preaffiliation performance documents that our result is not affected by selection bias and that fair trade affiliation generates a significant break in the schooling decisions of affiliated households.child schooling, market access, fair trade.
Valutazione ecografica del polmone dopo circolazione extracorporea e pneumoperitoneo
Si tratta di uno studio preliminare che si propone di individuare e studiare, attraverso l'ecografia, gli effetti della circolazione extra-corporea e dello pneumoperitoneo accompagnato alla posizione di Trendelenburg sulla presenza di acqua polmonare extravascolare ed allo stesso tempo di paragonare i reperti cosĂŹ ottenuti con i risultati di due indagini dalla validitĂ affermata, quali il dosaggio del BNP e la radiografia del torace. Ă stata selezionata una coorte di 40 pazienti, 21 dei quali sottoposti a interventi cardiochirurgici per valvulopatie o coronaropatie, e 19 sottoposti ad interventi di chirurgia videolaparoscopica robot-assistita per patologie addomino-pelviche. I risultati preliminari, sebbene condizionati dall'esiguitĂ del campione, confermano la validitĂ di questa metodica per una stima semiquantitativa dell'acqua polmonare extravascolare. Confermano inoltre la maggiore sensibilitĂ rispetto alla radiografia
Virtuous interactions in removing exclusion: the link between foreign market access and access to education
We devise a retrospective panel data approach to evaluate the effects of fair trade affiliation on the schooling decisions of a sample of Thai organic rice producers across the past 20 years. We find that the probability of school enrolment in families with more than two children is significantly affected by affiliation years. The finding is robust when dealing with endogeneity and heterogeneity issues in the estimate. The nonpositive preaffiliation performance documents that our result is not affected by selection bias and that fair trade affiliation generates a significant break in the schooling decisions of affiliated households.child schooling, market access, fair trade
Investigating alkyl nitrates as nitric oxide releasing precursors of multitarget acetylcholinesterase-monoamine oxidase B inhibitors
Herein we envisaged the possibility of exploiting alkyl nitrates as precursors of alcohol-bearing dual inhibitors targeting acetylcholinesterase (AChE) and monoamine oxidase B (MAO B), key enzymes in neurodegenerative syndromes such as Alzheimer's disease (AD), through biotransformation unmasking an alcoholic function upon nitric oxide (NO) release. The cooperation to neuroprotection of low fluxes of NO and target enzymesâ inhibition by the alcohol metabolites might return a multitargeting effect. The in vitro screening towards ChEs and MAOs of a collection of 21 primary alcohols disclosed a subset of dual inhibitors, among which three diverse chemotypes were selected to study the corresponding nitrates. Nitrate 14 proved to be a brain permeant, potent AChE-MAO B inhibitor by itself. Moreover, it protected human SH-SY5Y lines against rotenone and hydrogen peroxide with a poor inherent cytotoxicity and showed a slow conversion profile to its alcohol metabolite 9d that still behaved as bimodal and neuroprotective molecule
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