Simple derivation of the frequency dependent complex heat capacity

This paper gives a simple derivation of the well-known expression of the frequency dependent complex heat capacity in modulated temperature experiments. It aims at clarified again that the generalized calorimetric susceptibility is only due to the non-equilibrium behaviour occurring in the vicinity of thermodynamic equilibrium of slow internal degrees of freedom of a sample when the temperature oscillates at a well determined frequency

Global Conservation Status and Threat Patterns of the World’s Most Prominent Forage Fishes (Teleostei, Clupeiformes)

Conserving biodiversity is one of the greatest ethical responsibilities and challenges humans face. Understanding the conservation status of taxonomic groups provides a systematic way to prioritize efforts to combat biodiversity loss. The 405 species within the order Clupeiformes are the herrings, shads, sardines, anchovies, menhadens and relatives that include many of the most important marine forage fishes. These small, schooling fishes are economically, ecologically and culturally significant globally. Despite their contribution to global fisheries and our increasing reliance on these fishes for food and industrial commodities, they are generally poorly known with limited information regarding basic biology and population trends. I applied IUCN Red List methodology, a comprehensive and systematic approach to assessing extinction risk of species, to all clupeiform species. I then used these assessments to synthesize and address their global conservation status and to highlight the potential for improvements to conservation and fisheries management. The best estimate of nearly 11% of species are of elevated conservation concern, although this could be as high as 34% if Data Deficient species are all threatened. The Caribbean and the Indo-Malay-Philippine Archipelago both have high concentrations of either threatened or Data Deficient species and are areas of particular conservation concern. Major threats include exploitation, pollution and habitat modification for human use although the intensity of a specific threat differs between freshwater, estuarine and marine environments. Life history and ecological traits of threatened and Near Threatened species were characterized between primary habitat systems. Immediate conservation priorities include: 1) the evaluation of current fisheries management strategies, with a strong recommendation toward ecosystem-based management protocols that incorporate group-specific life history traits, and 2) local, intensive habitat restoration to reduce pollution and remove dams. These extinction risk assessments and subsequent analyses should be used to monitor conservation progress and as an informative tool for fisheries and conservation managers

Spin-memory loss at Co/Ru interfaces

We have determined the spin-memory-loss parameter, $\delta_{Co/Ru}$, by measuring the transmission of spin-triplet and spin-singlet Cooper pairs across Co/Ru interfaces in Josephson junctions and by Current-Perpendicular-to-Plane Giant Magnetoresistance (CPP-GMR) techniques. The probability of spin-memory loss at the Co/Ru interface is $(1-exp(-\delta_{Co/Ru}))$. From the CPP-MR, we obtain $\delta_{Co/Ru} = 0.34^{+0.04}_{-0.02}$ that is in good agreement with $\delta_{Co/Ru} = 0.35 \pm 0.08$ obtained from spin-triplet transmission. For spin-singlet transmission, we have $\delta_{Co/Ru} = 0.64 \pm 0.05$ that is different from that obtained from CPP-GMR and spin-triplet transmission. The source of this difference is not understood.Comment: 9 pages, 9 figure

Supercurrent-induced temperature gradient across a nonequilibrium SNS Josephson junction

Using tunneling spectroscopy, we have measured the local electron energy distribution function in the normal part of a superconductor-normal metal-superconductor (SNS) Josephson junction containing an extra lead to a normal reservoir. In the presence of simultaneous supercurrent and injected quasiparticle current, the distribution function exhibits a sharp feature at very low energy. The feature is odd in energy, and odd under reversal of either the supercurrent or the quasiparticle current direction. The feature represents an effective temperature gradient across the SNS Josephson junction that is controllable by the supercurrent.Comment: 4 pages, 4 figures, corrected typos, added plot to figure

Effect of Magnetic Impurities on Energy Exchange between Electrons

In order to probe quantitatively the effect of Kondo impurities on energy exchange between electrons in metals, we have compared measurements on two silver wires with dilute magnetic impurities (manganese) introduced in one of them. The measurement of the temperature dependence of the electron phase coherence time on the wires provides an independent determination of the impurity concentration. Quantitative agreement on the energy exchange rate is found with a theory by G\"{o}ppert et al. that accounts for Kondo scattering of electrons on spin-1/2 impurities.Comment: 4 page

Energy relaxation due to magnetic impurities in mesoscopic wires: Logarithmic approach

The transport in mesoscopic wires with large applied bias voltage has recently attracted great interest by measuring the energy distribution of the electrons at a given point of the wire, in Saclay. In the diffusive limit with negligible energy relaxation that shows two sharp steps at the Fermi energies of the two contacts, which are broadened due to the energy relaxation. In some of the experiments the broadening is reflecting an anomalous energy relaxation rate proportional to $E^{-2}$ instead of $E^{-3/2}$ valid for Coulomb electron-electron interaction, where $E$ is the energy transfer. Later it has been suggested that such relaxation rate can be due to electron-electron interaction mediated by Kondo impurities. In the present paper the latter is systematically studied in the logarithmic approximation valid above the Kondo temperature. In the case of large applied bias voltage Kondo resonances are formed at the steps of the distribution function and they are narrowed by increasing the bias. An additional Korringa energy broadening occurs for the spins which smears the Kondo resonances, and the renormalized coupling can be replaced by a smooth but essentially enhanced average coupling (factor of 8-10). Thus the experimental data can be described by formulas without logarithmic Kondo corrections, but with enhanced coupling. In certain regions of large bias, that averaged coupling depends weakly on the bias. In those cases the distribution function depends only on the ratio of the electron energy and the bias, showing scaling behavior. The impurity concentrations estimated from those experiments and other dephasing experiments can be very different, and a possible explanation considering the surface spin anisotropy due to strong spin-orbit interaction is the subject of our earlier paper.Comment: 12 pages, RevTex

Refining Clinician Workflow as a Means to Improving Catheter Quality Measures

Objective This study aimed to improve the quality measure performance for indwelling urinary catheter (IUC) duration, central venous catheter (CVC) duration, and telemetry duration by redesigning clinical decision support (CDS) tools within the documentation process and order workflow. Methods The effectiveness of the redesign was evaluated using system standard quality reporting methodology to observe device duration, central-line-associated bloodstream infection (CLABSI) rate, and catheter-associated urinary tract infection (CAUTI) rate preintervention (FY2017) and postintervention (FY2018). Electronic health record (EHR) reporting tools were used to evaluate CDS alert data both preintervention and postintervention. Results Total device duration and line days per patient days were reduced for CVC (12.8% [0.305–0.266]) and IUC (4.68% [0.171–0.163]). Mean telemetry duration was reduced by 16.94% (3.72–3.09 days), and CDS alert volume decreased 18.6% from a preintervention mean of 1.18 alerts per patient per day (81,190 total alerts) to a postintervention mean of 0.96 alerts per patient per day (61,899 total alerts). Both CLABSI (2.8% [1.07–1.04]) and CAUTI (8.1% [1.61–1.48]) rates were reduced, resulting in approximately $926,000 in savings. Conclusion In this novel model, the redesigned CDS tools improved clinician response to CDS alerts, prompting providers to take action on relevant orders that automatically updated the clinical documentation to reflect their actions. The study demonstrated that effective redesign of CDS tools within the documentation process and order workflow can reduce device duration, improve patient outcomes, and decrease CDS alert volume

Risk Assessment Plan for Petroleum Underground Storage Tanks in Kentucky

This study addresses the development of guidelines for corrective actions to be applied to petroleum underground storage tanks (USTs) within the Commonwealth of Kentucky. The report presents findings and recommendations for gasoline, diesel fuel, heating oil, kerosene, jet fuel, and waste oil

Length polymorphism and head shape association among genes with polyglutamine repeats in the stalk-eyed fly, Teleopsis dalmanni

<p>Abstract</p> <p>Background</p> <p>Polymorphisms of single amino acid repeats (SARPs) are a potential source of genetic variation for rapidly evolving morphological traits. Here, we characterize variation in and test for an association between SARPs and head shape, a trait under strong sexual selection, in the stalk-eyed fly, <it>Teleopsis dalmanni</it>. Using an annotated expressed sequence tag database developed from eye-antennal imaginal disc tissues in <it>T. dalmanni </it>we identified 98 genes containing nine or more consecutive copies of a single amino acid. We then quantify variation in length and allelic diversity for 32 codon and 15 noncodon repeat regions in a large outbred population. We also assessed the frequency with which amino acid repeats are either gained or lost by identifying sequence similarities between <it>T. dalmanni </it>SARP loci and their orthologs in <it>Drosophila melanogaster</it>. Finally, to identify SARP containing genes that may influence head development we conducted a two-generation association study after assortatively mating for extreme relative eyespan.</p> <p>Results</p> <p>We found that glutamine repeats occur more often than expected by amino acid abundance among 3,400 head development genes in <it>T. dalmanni </it>and <it>D. melanogaster</it>. Furthermore, glutamine repeats occur disproportionately in transcription factors. Loci with glutamine repeats exhibit heterozygosities and allelic diversities that do not differ from noncoding dinucleotide microsatellites, including greater variation among X-linked than autosomal regions. In the majority of cases, repeat tracts did not overlap between <it>T. dalmanni </it>and <it>D. melanogaster </it>indicating that large glutamine repeats are gained or lost frequently during Dipteran evolution. Analysis of covariance reveals a significant effect of parental genotype on mean progeny eyespan, with body length as a covariate, at six SARP loci [CG33692, <it>ptip</it>, <it>band4.1 inhibitor LRP interactor</it>, <it>corto</it>, 3531953:1, and <it>ecdysone-induced protein 75B </it>(<it>Eip75B</it>)]. Mixed model analysis of covariance using the eyespan of siblings segregating for repeat length variation confirms that significant genotype-phenotype associations exist for at least one sex at five of these loci and for one gene, CG33692, longer repeats were associated with longer relative eyespan in both sexes.</p> <p>Conclusion</p> <p>Among genes expressed during head development in stalk-eyed flies, long codon repeats typically contain glutamine, occur in transcription factors and exhibit high levels of heterozygosity. Furthermore, the presence of significant associations within families between repeat length and head shape indicates that six genes, or genes linked to them, contribute genetic variation to the development of this extremely sexually dimorphic trait.</p

The stochastic matching problem

The matching problem plays a basic role in combinatorial optimization and in statistical mechanics. In its stochastic variants, optimization decisions have to be taken given only some probabilistic information about the instance. While the deterministic case can be solved in polynomial time, stochastic variants are worst-case intractable. We propose an efficient method to solve stochastic matching problems which combines some features of the survey propagation equations and of the cavity method. We test it on random bipartite graphs, for which we analyze the phase diagram and compare the results with exact bounds. Our approach is shown numerically to be effective on the full range of parameters, and to outperform state-of-the-art methods. Finally we discuss how the method can be generalized to other problems of optimization under uncertainty.Comment: Published version has very minor change