Thermoelectric and Seebeck coefficients of granular metals

In this work we present a detailed study and derivation of the thermopower and thermoelectric coefficient of nano-granular metals at large tunneling conductance between the grains, g_T>> 1. An important criterion for the performance of a thermoelectric device is the thermodynamic figure of merit which is derived using the kinetic coefficients of granular metals. All results are valid at intermediate temperatures, E_c>>T/g_T>\delta, where \delta is the mean energy level spacing for a single grain and E_c its charging energy. We show that the electron-electron interaction leads to an increase of the thermopower with decreasing grain size and discuss our results in the light of future generation thermoelectric materials for low temperature applications. The behavior of the figure of merit depending on system parameters like grain size, tunneling conductance, and temperature is presented.Comment: 27 pages, 10 figures, revtex

Patients' experiences of clinicians' crying during psychotherapy for eating disorders

Many psychotherapists have cried in a therapy session. Those clinicians who do cry see it as likely to have a positive impact on the therapy or to have no impact, and therapist personality characteristics have not shown reliable associations to crying in therapy. However, it is not known how patients experience therapists' crying, or whether the patient's view of the therapist's characteristics is related to that experience. This study used an online survey, recruiting 202 patients with eating disorders, 188 of whom had received therapy for an eating disorder, and 105 of whom had experienced a therapist crying. Retrospective data from those 105 individuals indicated that therapists' crying tended to be seen positively, by patients but that perception was influenced by the patients' perceptions of the demeanor of their therapist and their understanding of the meaning of the crying. Although they need to be extended to other disorders, these findings suggest that therapists' crying needs to be understood in the context of the therapist's perceived characteristics and demeanor, rather than being assumed to be positive or to have no impact on the therapy

Human Resources as Ethical Gatekeepers: Hiring Ethics and Employee Selection

The act of hiring an individual can have considerable ethical and legal implications for an organization. To better identify the concepts that influence hiring and employment selection ethics, a review of the recent literature found several areas of importance for both academics and hiring managers alike. Past researchers claim hiring managers are influenced by the concepts of moral obligation, diversity, antidiscrimination, integrity, and employment fairness whenever they embark on hiring new personnel. Awareness and action in these areas will lead to motivating factors which can change attitudes, while allowing ethical hiring practices to shape organizational culture. The literature presents a dichotomy of understanding that when organizations use a defined ethical hiring standard, employers are more likely to recruit and hire ethical candidates. This understanding creates the assumptions that managers are obligated with the responsibility of being ethical gatekeepers for their respective organization

Solvent contribution to the stability of a physical gel characterized by quasi-elastic neutron scattering

The dynamics of a physical gel, namely the Low Molecular Mass Organic Gelator {\textit Methyl-4,6-O-benzylidene-$\alpha$ -D-mannopyranoside ($\alpha$-manno)} in water and toluene are probed by neutron scattering. Using high gelator concentrations, we were able to determine, on a timescale from a few ps to 1 ns, the number of solvent molecules that are immobilised by the rigid network formed by the gelators. We found that only few toluene molecules per gelator participate to the network which is formed by hydrogen bonding between the gelators' sugar moieties. In water, however, the interactions leading to the gel formations are weaker, involving dipolar, hydrophobic or $\pi-\pi$ interactions and hydrogen bonds are formed between the gelators and the surrounding water. Therefore, around 10 to 14 water molecules per gelator are immobilised by the presence of the network. This study shows that neutron scattering can give valuable information about the behaviour of solvent confined in a molecular gel.Comment: Langmuir (2015

Mauve Assembly Metrics

Summary: High-throughput DNA sequencing technologies have spurred the development of numerous novel methods for genome assembly. With few exceptions, these algorithms are heuristic and require one or more parameters to be manually set by the user. One approach to parameter tuning involves assembling data from an organism with an available high-quality reference genome, and measuring assembly accuracy using some metrics

Anomalous asymmetry of magnetoresistance in NbSe3_3 single crystals

A pronounced asymmetry of magnetoresistance with respect to the magnetic field direction is observed for NbSe$_3$ crystals placed in a magnetic field perpendicular to their conducting planes. It is shown that the effect persists in a wide temperature range and manifests itself starting from a certain magnetic induction value $B_0$, which at $T=4.2$ K corresponds to the transition to the quantum limit, i.to the state where the Landay level splitting exceeds the temperature.Comment: 4 pages, 6 figures, to be appeared in JETP Let

Diffusion and Transport Coefficients in Synthetic Opals

Opals are structures composed of the closed packing of spheres in the size range of nano-to-micro meter. They are sintered to create small necks at the points of contact. We have solved the diffusion problem in such structures. The relation between the diffusion coefficient and the termal and electrical conductivity makes possible to estimate the transport coefficients of opal structures. We estimate this changes as function of the neck size and the mean-free path of the carriers. The theory presented is also applicable to the diffusion problem in other periodic structures.Comment: Submitted to PR