The superconducting phase of Calcium under the pressure at 200 GPa: the strong-coupling description

The thermodynamic parameters of the superconducting state in Calcium under the pressure at 200 GPa have been determined. The numerical analysis by using the Eliashberg equations in the mixed representation has been conducted. It has been stated, that the critical temperature ($T_{C}$) decreases from 36.15 K to 20.79 K dependently on the assumed value of the Coulomb pseudopotential ($\mu^{*}\in$). Next, the order parameter near the temperature of zero Kelvin ($\Delta(0)$) has been obtained. It has been proven, that the dimensionless ratio $2\Delta(0)/k_{B}T_{C}$ decreases from 4.25 to 3.90 together with the growth of $\mu^{*}$. Finally, the ratio of the electron effective mass to the electron bare mass ($m^{*}_{e}/m_{e}$) has been calculated. It has been shown, that $m^{*}_{e}/m_{e}$ takes the high value in the whole range of the superconducting phase's existence, and its maximum is equal to 2.23 for T=T_{C}.Comment: 5 pages, 5 figure

Non-adiabatic superconductivity in the electron-doped graphene

In the present study, we investigate the impact of the non-adiabatic effects on the superconducting state in the electron-doped graphene. In particular, by using the Eliashberg formalism we analyze the case scenario of the nitrogen-doped graphene, showing that the non-adiabatic effects complement electron-electron interaction and notably reduce (up to ∼ 40%) pivotal thermodynamic properties, such as: the critical temperature, the superconducting gap and their characteristic ratio. Interestingly, the influence of the non-adiabatic effects is found to rise together with the increase of the depairing Coulomb interaction. These observations are elucidated based on the structure of the vertex corrections to the electron-phonon interaction. As a result, we draw a direction for the future research in the field of the two-dimensional non-adiabatic superconductivity

Awareness in ActionThe Role of Consciousness in Language Acquisition /

XVI, 268 p. 29 illus.online resource

Energetics and Electronic Rearrangements of Proton Transfer in (H3NHOH2)+

Proton transfer between N and O in the hydrogen-bonded system (H3NHOH2)+ is studied by ab initio molecular orbital methods. Potential energy curves are calculated at the hartree–Fock level using the 4–31G basis set for hydrogen bond lengths R(NO) varying from the equilibrium value of 2.664 to 3.10 Å. Short hydrogen bonds are associated with asymmetric single-well potentials in which the minimum corresponds to the NHO configuration. For longer R(NO) separations, the potential is of double-well form, including both NHO and NHO as minima. It is found that the height of the energy barrier to proton transfer is sensitive to both stretches and bends of the hydrogen bond. Continuous changes in the electron density are monitored at various stages of proton transfer via density difference maps and Mulliken population analyses. The initial loss of density from the proton-accepting molecule during the first half of the transfer is accelerated during the second half. A correlation is drawn between the energetics of transfer in a number of systems and the net charge lost by the proton-acceptor group

The Meeting Center Support Programme (MCSP), a combined support programme for people with dementia (PWD) and their caregivers: first results in Italy after 7 months of attendance

Objectives: The MEETINGDEM Project aims to implement an innovative approach to support people with mild-moderate dementia (PWD) and their families in Italy, Poland and UK. This person-centered approach (Meeting Center Support Programme -MCSP-) has already been implemented in the Netherlands and demonstrated benefits (reduced behavioural and mood problems -BPSD-, delayed admission to residential care, higher levels of carer competence and lower levels of burden). MCSP proposes activities to stimulate PWD, support for caregivers (CGS) and actions for both. Our aim is to investigate differences between PWD and CGS partipating in two Italian Centers (Milano Zona 4 , Milano Zona 7; N=26+26) and an Italian control group (CTR -usual care- N=10+10). Materials and Methods: PWD were recruited according to the Global Deterioration Scale score (GDS: 4-5). Dyads of both groups were assessed at the beginning of participation in the project (T0) and after 7 months (T1) to collect data about behavioural disturbances and distress level through NeuroPsychiatric Inventory (NPI) administration. Results: At first T0-T1 design was applied (ANCOVA repeated measures 2x2, taking into account the baseline data and potential confounders as covariates). Our preliminary results are from NPI data: CGS \u394 distress is statistically different in MCSP vs CTR group (p=0.002; covariates: Center, age, education years, cohabitation); \u394 BPSD gravity (FxG) (p=0.034; covariates: Center, age, education years). Applying multiple regression to a four-factor model of NPI about CGS \u394 distress we find that in MCSP group \u2018Behavioural\u2019 (p=0.015) and \u2018Euphoria\u2019 (p=0.019) factors can predict the distress pattern whereas in CTR group only \u2018Behavioural\u2019 factor (p=0.022) can predict it. Discussion: Significant differences were found in perceived distress by caregivers: these first preliminary data support the efficacy of the MCSP approach to sustain caregivers of PWD. A significant difference was also found regarding FxG of BPSD. This finding is in agreement with previous studies demonstrating the efficacy of multidimensional approaches to reduce BPSD. Conclusion: We present preliminary results about BPSD of PWD and caregiver distress. These results suggest that dementia impact on quality of life of caregivers could be decreased and BPSD could be reduced by combining support for PWD and their carers