cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Frequency multiplication using induced dipole domains in a semiconductor superlattice
Creators: name: Scheuerer, Roland
name: Pavelev, Dimitri
name: Renk, Karl Friedrich
name: Schomburg, Ekkehard
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: Charge carrier waves; Frequency conversion; Semiconductor superlattices
subject: 530 Physik

description: We theoretically studied the possibility of frequency multiplication using propagating dipole domains which are induced in a semiconductor superlattice by microwave radiation. We have investigated the dynamics of electrons in a superlattice submitted to both a static voltage and a microwave field by performing a simulation based on a drift-diffusion model and incorporating current-limiting boundary conditions. The motion of electrons in the superlattice was governed by an Esaki–Tsu drift velocity field characteristic with a negative differential mobility above a critical electrical field. The simulation delivered, for a static voltage larger than a critical voltage, the periodic formation and annihilation of propagating dipole domains and, as a consequence, a reduction of the direct current through the superlattice. Our simulation showed that an additional microwave field can periodically induce and subsequently quench domains giving rise to a strongly anharmonic current. The anharmonicity of the current is the origin for the generation of higher harmonics of the microwave field. Both the formation and annihilation of a domain can take place within a time of about 1 ps suggesting that the mechanism of domain induction and quenching can be used for generation of radiation up to almost 1 THz.
A large stellar evolution database for population synthesis studies: VI. White dwarf cooling sequences
Creators: name: Salaris, M.
name: Cassisi, S.
name: Pietrinferni, A.
name: Kowalski, P. M.
name: Isern, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a new set of cooling models and isochrones for both H- and He-atmosphere white dwarfs, incorporating accurate boundary conditions from detailed model atmosphere calculations, and carbon-oxygen chemical abundance profiles based on updated stellar evolution calculations from the BaSTI stellar evolution archive - a theoretical data center for the Virtual Observatory. We discuss and quantify the uncertainties in the cooling times predicted by the models, arising from the treatment of mixing during the central H- and He-burning phases, number of thermal pulses experienced by the progenitors, progenitor metallicity and the $^{12}C(α,γ)^{16}O$ reaction rate. The largest sources of uncertainty turn out to be related to the treatment of convection during the last stages of the progenitor central He-burning phase, and the $^{12}C(α,γ)^{16}O$ reaction rate. We compare our new models to previous calculations performed with the same stellar evolution code, and discuss their application to the estimate of the age of the solar neighborhood, and the interpretation of the observed number ratios between H- and He-atmosphere white dwarfs. The new white dwarf sequences and an extensive set of white dwarf isochrones that cover a large range of ages and progenitor metallicities are made publicly available at the official BaSTI website.
description: 34 pages, 13 figures, The Astrophysical Journal, in press
Introducing heifers to freestalls using a social model
Creators: name: Nemeth, Geoffrey
Publisher: name: University of British Columbia
Year: 2018

description: Older conspecifics can model important behaviours in group-living species, potentially reducing reliance on trial and error learning. On many farms animals are segregated by age, preventing this social modelling from occurring. The modern dairy farm is an ideal model for studying how young cattle adapt to new environments, and how these adaptations may improve through the use of social models. Freestalls, a common housing system for dairy cattle, contain individual cubicles designed to provide a clean and easy to maintain lying surfaces for cattle. However, learning to use these stalls can be a challenge for naïve animals. When introduced to freestalls for the first time, some animals refuse to lie in these stalls, choosing instead to lie in the wet manure alleys. The aim of this study was to compare the behavioural responses of naïve dairy heifers when introduced to freestalls with and without a social model that was familiar with freestall housing. Naïve Holstein heifers were randomly assigned into pairs; half were assigned a social model, and the remaining pairs were left as control groups, using 11 groups per treatment. When first introduced to freestall housing, all heifers showed a mean (± SE) 2.5-3 ± 0.6 h/d decrease in lying time and around a 1 ± 0.4 h/d decrease in average feeding time, while average time spent standing in the alley increased by 2 ± 0.4 h/d with these behaviours returning to baseline within two days. Heifers moved without a social model were more likely to lie in the alley versus heifers moved with an experienced social companion, but otherwise lying behaviour was not affected by treatment. These results indicate that the transition to freestall housing is difficult for all heifers, and providing naïve heifers with an experienced social model can reduce occurrences of undesirable stall refusal behaviour.
Thermopower of a superconducting single-electron transistor
Creators: name: Turek, Marko
name: Siewert, Jens
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik
subject: 72.15.Jf
subject: 73.23.Hk
subject: 74.45.1c

description: We present a linear-response theory for the thermopower of a single-electron transistor consisting of a superconducting island weakly coupled to two normal-conducting leads. The thermopower shows oscillations with the same periodicity as the conductance and is rather sensitive to the size of the superconducting gap Δ. In particular, the previously studied sawtooth-like shape of the thermopower for a normal-conducting single-electron device is qualitatively changed even for small gap energies.
Signatures of spin-related phases in transport through regular polygons
Creators: name: Bercioux, Dario
name: Frustaglia, Diego
name: Governale, Michele
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We address the subject of transport in one-dimensional ballistic polygon loops subject to Rashba spin-orbit coupling. We identify the role played by the polygon vertices in the accumulation of spin-related phases by studying interference effects as a function of the spin-orbit coupling strength. We find that the vertices act as strong spin-scattering centers that hinder the developing of Aharovov-Casher and Berry phases. In particular, we show that the oscillation frequency of interference pattern can be doubled by modifying the shape of the loop from a square to a circle.
Bloch gain for terahertz radiation in semiconductor superlattices of different miniband widths mediated by acoustic and optical phonons
Creators: name: Demarina, N. V.
name: Renk, Karl Friedrich
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We report a study of the role of electron scattering at acoustic and polar optic phonons for Bloch gain of a terahertz radiation in semiconductor superlattices of different miniband widths. A three-dimensional Monte Carlo method was employed to calculate the dynamic mobility of miniband electrons in GaAs/AlAs superlattices subject to both static and high-frequency fields at low temperature (4 K); Bloch gain is indicated by a negative real part of the dynamic mobility. We found that for a superlattice with a miniband width smaller than the optic phonon energy (36 meV), scattering of electrons at acoustic phonons alone mediates the formation of electron bunches in momentum space and introduces gain, while for larger miniband widths, optic phonon scattering is dominant for gain. Due to a decrease of the energy-relaxation time of the miniband electrons, the alteration of the superlattice miniband width from smaller to larger magnitude, with respect to the optic phonon energy, results in broadening of the resonancelike dynamic mobility curve and considerable extension of the frequency range for the strong Bloch gain. The study delivers criteria for the observation of the Bloch gain.
Scaling Violation and Inelasticity of Very High Energy Proton-Proton Interactions
Creators: name: Wibig, Tadeusz
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The pseudorapidity measurements at LHC, although in the central region only, allows to perform preliminary tests of the multiparticle production extrapolation formula inspired by the recent cosmic ray data analysis. Feynman scaling violation in the form proposed originally by Wdowczyk and Wolfendale in 70s has been applied to the Pierre Auger Observatory and the Hi-Res group measurements. The consistency of the Extensive Air Shower development and anisotropy data was found for smoothly rise of the scaling violation parameter. We have shown that the longitudinal momenta of produced particles determined inclusively as rapidity (pseudorapidity) distributions measured by LHC experiments follow the some universal high energy distribution scaled respectively. The high degree of Feynman scaling violation is confirmed. The decrease of the very high energy interaction inelasticity suggested by cosmic ray data analysis is found to be consistent with LHC measurements up to 7 TeV.
COVID-19 Trade Actions in the Agricultural and Food Sector
Creators: name: Ahn, Soojung
name: Steinbach, Sandro
name: Ahn, Soojung
name: Steinbach, Sandro
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: Coronavirus pandemic
subject: trade actions
subject: agricultural and food sector
subject: control function approach
subject: product level

description: This study investigated the determinants of trade actions in the agricultural and food sector related to the coronavirus pandemic. These emergency trade measures aimed to prevent the inflow of certain products and promote the import of others. We investigated the determinants of such measures using product-level trade action data for WTO members. Applying an instrumental variable approach that accounts for high-dimensional fixed effects, we found that trade actions relate negatively to the applied tariff level and the domestic pandemic severity. Countries implemented fewer trade facilitation actions considering increased domestic COVID-19 cases, but this was done more in response to spiking foreign case numbers.
Semiclassical theory of weak antilocalization and spin relaxation in ballistic quantum dots
Creators: name: Zaitsev, Oleg
name: Frustaglia, Diego
name: Richter, Klaus
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik
subject: 73.23.-b
subject: 03.65.Sq
subject: 71.70.Ej

description: We develop a semiclassical theory for spin-dependent quantum transport in ballistic quantum dots. The theory is based on the semiclassical Landauer formula, that we generalize to include spin-orbit and Zeeman interaction. Within this approach, the orbital degrees of freedom are treated semiclassically, while the spin dynamics is computed quantum mechanically. Employing this method, we calculate the quantum correction to the conductance in quantum dots with Rashba and Dresselhaus spin-orbit interaction. We find a strong sensitivity of the quantum correction to the underlying classical dynamics of the system. In particular, a suppression of weak antilocalization in integrable systems is observed. These results are attributed to the qualitatively different types of spin relaxation in integrable and chaotic quantum cavities.
Air pollution and global public health
Creators: name: Paul, C.J.
name: Miranda, Marie Lynn
Publisher: name: University of Notre Dame
Year: 2023

description: At the beginning of the twenty-first century, key public health issues and challenges have taken centre stage. They range from arsenic in drinking water to asthma among children and adults; from the re-emergence of cholera, to increasing cancer rates and other chronic diseases; from AIDS to malaria and hepatitis; from the crises faced by displaced or refugee populations to the new challenges that have emerged for reproductive health and rights.
K X-Ray Energies and Transition Probabilities for He-, Li- and Be-like Praseodymium ions
Creators: name: Santos, J. P.
name: Costa, A. M.
name: Martins, M. C.
name: Indelicato, P.
name: Parente, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Theoretical transition energies and probabilities for He-, Li- and Be-like Praseodymium ions are calculated in the framework of the multi-configuration Dirac-Fock method (MCDF), including QED corrections. These calculated values are compared to recent experimental data obtained in the Livermore SuperEBIT electron beam ion trap facility.
Subterahertz superlattice parametric oscillator
Creators: name: Renk, Karl Friedrich
name: Stahl, Benjamin Ingo
name: Rogl, Andreas
name: Janzen, T.
name: Pavel'ev, D.
name: Koschurinov, Y.
name: Ustinov, V.
name: Zhukov, A.
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We report a superlattice parametric oscillator (SPO), with a GaAs=AlAs superlattice as the activeelement. The SPO was pumped by a microwave field (power 4 mW) and produced third harmonic radiation at subterahertz frequencies (near 300 GHz; 0.1 mW). We attribute the parametric gain to the nonlinearity of the miniband transport.
PERMOL: Restraint-based protein homology modeling using DYANA or CNS.
Creators: name: Möglich, Andreas
name: Weinfurtner, Daniel
name: Gronwald, Werner
name: Maurer, Thilo
name: Kalbitzer, Hans-Robert
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: PERMOL is a new restraint-based program for homology modeling of proteins. Restraints are generated from the information contained in structures of homologous template proteins. Employing the restraints generated by PERMOL, three-dimensional structures are obtained using MD programs such as DYANA or CNS. In contrast to other programs PERMOL is mainly based on the use of dihedral angle information which is optimally suited to preserve the local secondary structure. The global arrangement of these elements is then facilitated by a small number of distance restraints. Using PERMOL homology, models of high quality are obtained. A key advantage of the proposed method is its flexibility, which allows the inclusion of data from other sources, such as experimental restraints and the use of modern molecular dynamics programs to calculate structures.
A restrained molecular dynamics and simulated annealing approach for protein homology modeling utilizing mean angles.
Creators: name: Möglich, Andreas
name: Weinfurtner, Daniel
name: Maurer, Thilo
name: Gronwald, Werner
name: Kalbitzer, Hans-Robert
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: Background We have developed the program PERMOL for semi-automated homology modeling of proteins. It is based on restrained molecular dynamics using a simulated annealing protocol in torsion angle space. As main restraints defining the optimal local geometry of the structure weighted mean dihedral angles and their standard deviations are used which are calculated with an algorithm described earlier by Döker et al. (1999, BBRC, 257, 348–350). The overall long-range contacts are established via a small number of distance restraints between atoms involved in hydrogen bonds and backbone atoms of conserved residues. Employing the restraints generated by PERMOL three-dimensional structures are obtained using standard molecular dynamics programs such as DYANA or CNS. Results To test this modeling approach it has been used for predicting the structure of the histidine-containing phosphocarrier protein HPr from E. coli and the structure of the human peroxisome proliferator activated receptor γ (Ppar γ). The divergence between the modeled HPr and the previously determined X-ray structure was comparable to the divergence between the X-ray structure and the published NMR structure. The modeled structure of Ppar γ was also very close to the previously solved X-ray structure with an RMSD of 0.262 nm for the backbone atoms. Conclusion In summary, we present a new method for homology modeling capable of producing high-quality structure models. An advantage of the method is that it can be used in combination with incomplete NMR data to obtain reasonable structure models in accordance with the experimental data.
Semiconductor-Superlattice Frequency Mixer For Detection of Submillimeter Waves
Creators: name: Renk, Karl Friedrich
name: Rogl, Andreas
name: Stahl, Benjamin Ingo
name: Meier, Alexander
name: Koschurinov, Y.
name: Pavel'ev, D.
name: Ustinov, V.
name: Zhukov, A.
name: Maleev, N.
name: Vasilyev, A.
Publisher: name: Universität Regensburg
Year: 2006
Subjects: subject: harmonic mixer; semiconductor superlattice; submillimeter waves
subject: 530 Physik

description: We report on a GaAs/AlAs superlattice frequency mixer for detection of submillimeter waves. The mixer is based on the nonlinear miniband transport giving rise to domains excited under the action of a microwave field. We designed the mixer for broadband operation (300–600 GHz). For studying basic properties, we investigated the mixer as a harmonic mixer in 15th order to detect radiation at a radio frequency (RF) near 300 GHz using local oscillator (LO) radiation of a frequency near 20 GHz. We reached a noise equivalent power (NEP) of about 10 fW/Hz. We also show that the use of the superlattice mixer together with a superlattice frequency multiplier allows to realize a superlattice-based free-space transmission line for submillimeter waves.
Strong solutions of semilinear parabolic equations with measure data and generalized backward stochastic differential equations
Creators: name: Klimsiak, Tomasz
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We prove that under natural assumptions on the data strong solutions in Sobolev spaces of semilinear parabolic equations in divergence form involving measure on the right-hand side may be represented by solutions of some generalized backward stochastic differential equations. As an application we provide stochastic representation of strong solutions of the obstacle problem be means of solutions of some reflected backward stochastic differential equations. To prove the latter result we use a stochastic homographic approximation for solutions of the reflected backward equation. The approximation may be viewed as a stochastic analogue of the homographic approximation for solutions to the obstacle problem.
Summarization of partial email threads : silver standards and bayesian surprise
Creators: name: Johnson, Jordon Kent
Publisher: name: University of British Columbia
Year: 2018

description: We define and motivate the problem of summarizing partial email threads. This problem introduces the challenge of generating reference summaries for these partial threads when extractive human annotation is only available for the threads as a whole, since gold standard annotation intended to summarize a completed email thread may not always be equally applicable to each of its partial threads, particularly when the human-selected sentences are not uniformly distributed within the threads. We propose a framework for generating these reference summaries with arbitrary length in an oracular manner by exploiting existing gold standard summaries for completed email threads. We also propose and evaluate two sentence scoring functions that can be used in this "silver standard" framework, and we are making the resulting datasets publicly available. In addition, we apply a recent unsupervised method based on Bayesian Surprise that incorporates background knowledge to partial thread summarization, extend that method with conversational features, and modify the mechanism by which it handles information redundancy. Experiments with our partial thread summarizers indicate comparable or improved performance relative to a state-of-the-art unsupervised full thread summarizer baseline in most cases; and we have identified areas in which potential vulnerabilities in our methods can be avoided or accounted for. Furthermore, our results suggest that the potential benefits of background knowledge to partial thread summarization should be further investigated with larger datasets.
Milking characteristics, hygiene and management practices in Saanen goat farms: a case of Canakkale province, Turkey
Creators: name: Gökdai, Arzu
name: Sakarya, Engin
name: Contiero, Barbara
name: Gottardo, Flaviana
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: In order to determine the current status of milking characteristics, hygiene and health protection practices in Saanen goat farms in Turkey, data were obtained from 92 farms through surveys in Çanakkale province. The farms are grouped according to the number of animals as small-scale (25–75 heads), medium-scale (76–150 heads) and large-scale (151 and overheads). As a result of the data observed, it has been seen that the majority of the farms (63.04%) had primary education and only 8.69% had education at the university level. While 44 farms have a milking machine or milking system in their farms, the other 48 farms use the hand milking. The 72.8% of the farms stated that they did not receive any training on milking hygiene and milking machines. Breast diseases are among the most common health problems in the farms (61.9%), followed by, digestive system diseases (8.6%), bacterial diseases (5.4%), foot diseases (2.1%) and viral diseases (4.3%), respectively. The prevalence of mastitis which is the leading cause of breast disease differs statistically in terms of scale (p The current status of milking hygiene and practices was evaluated.Mastitis was the most common disease (39.1%) observed in Saanen goat farms.To prevent economic losses due to diseases, farmers should be trained on hygiene and management practices. The current status of milking hygiene and practices was evaluated. Mastitis was the most common disease (39.1%) observed in Saanen goat farms. To prevent economic losses due to diseases, farmers should be trained on hygiene and management practices.
Periodic Variability of Low-Mass Stars in SDSS Stripe 82
Creators: name: Becker, A. C.
name: Bochanski, J. J.
name: Hawley, S. L.
name: Ivezić, Ž
name: Kowalski, A. F
name: Sesar, B.
name: West, A. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a catalog of periodic stellar variability in the "Stripe 82" region of the Sloan Digital Sky Survey (SDSS). After aggregating and recalibrating catalog-level data from the survey, we ran a period-finding algorithm (Supersmoother) on all point-source lightcurves. We used color selection to identify systems that are likely to contain low-mass stars, in particular M dwarfs and white dwarfs. In total, we found 207 candidates, the vast majority of which appear to be in eclipsing binary systems. The catalog described in this paper includes 42 candidate M dwarf / white dwarf pairs, 4 white-dwarf pairs, 59 systems whose colors indicate they are composed of 2 M dwarfs and whose lightcurve shapes suggest they are in detached eclipsing binaries, and 28 M dwarf systems whose lightcurve shapes suggest they are in contact binaries. We find no detached systems with periods longer than 3 days, thus the majority of our sources are likely to have experienced orbital spin-up and enhanced magnetic activity. Indeed, twenty-six of twenty-seven M dwarf systems that we have spectra for show signs of chromospheric magnetic activity, far higher than the 24% seen in field stars of the same spectral type. We also find binaries composed of stars that bracket the expected boundary between partially and fully convective interiors, which will allow the measurement of the stellar mass-radius relationship across this transition. The majority of our contact systems have short orbital periods, with small variance (0.02 days) in the sample near the observed cutoff of 0.22 days. The accumulation of these stars at short orbital period suggests that the process of angular momentum loss, leading to period evolution, becomes less efficient at short periods. (Abridged)
description: ApJ, Accepted. 6 figures, 3 tables. Data available for download at http://www.astro.washington.edu/users/becker/dataRelease/stripe82Periodic/
title: 90 Jahre Lehre und Forschung für den Gartenbau in Dresden-Pillnitz
Creators: name: Grünes Forum Pillnitz (Hrsg.)
Publisher: name: Julius Kühn-Institut
Year: 2012
Subjects: Lehre
Forschung
Gartenbau

description: Julius-Kühn-Archiv; 435; 3-142
Low-Income Household Food Consumption Consequences of Rice Policy and Pandemic Impacts on Income and Price in Thailand
Creators: name: Hoang, Hoa T.K.
name: Thompson, Wyatt
name: Kwon, Sanguk
name: Hoang, Hoa T.K.
name: Thompson, Wyatt
name: Kwon, Sanguk
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: International Relations/Trade
subject: food security
subject: COVID-19
subject: household-level analysis
subject: demand estimation
subject: rice policy
subject: food policy
subject: censored model
subject: consumer economics

description: Using Thai household data, we estimated a demand system and analyzed the impacts of changes in rice prices and household income on food consumption, then used these results in four experiments. We found that a trade policy that attempts to reduce domestic prices benefits households in the higher income brackets while negatively affecting low-income, rice-producing households’ food security. Results suggest that an agricultural policy with a view to support food security might have different, if not opposite, distributional impacts on targeted groups.
31879: Bulk buying
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: I would usually buy flour in 1.5kg bags from the supermarket. However, during the lockdown it has become impossible to obtain some staples, including bread flour and yeast from the usual sources. The result is that some have resorted to buying in bulk and dividing it up between friends, as happened with me. It has felt like some sort of black market when I have had to turn up at someone's house to collect my share of flour and yeast.
Ultrafast creation and annihilation of space-charge domains in a semiconductor superlattice observed by use of terahertz fields
Creators: name: Klappenberger, Florian
name: Alekseev, K.
name: Renk, Karl Friedrich
name: Scheuerer, R.
name: Schomburg, Ekkehard
name: Allen, S.
name: Ramian, G.
name: Scott, J.
name: Kovsh, A.
name: Ustinov, V.
name: Zhukov, A.
Publisher: name: Universität Regensburg
Year: 2004
Subjects: subject: 530 Physik

description: We report an experimental study indicating ultrafast creation and annihilation of space-charge domains in a semiconductor superlattice under the action of a THz field. Our experiment was performed for an InGaAs/InAlAs superlattice with the conduction electrons undergoing miniband transport. We applied to a superlattice a dc bias that was slightly smaller than a critical bias necessary for the formation of space-charge domains caused by a static negative differential conductivity. Additionally subjecting the superlattice to a strong THz field, resulted in a dc transport governed by the formation of domains if the frequency of the field was smaller than an upper frequency limit (~3 THz). From this frequency limit for the creation and annihilation of domains we determined the characteristic time of the domain buildup. Our analysis shows that the buildup time of domains in a wide miniband and heavily doped superlattice is limited by the relaxation time due to scattering of the miniband electrons at polar optic phonons. Our results are of importance for both an understanding of ultrafast dynamics of pattern formation in nanostructures and the development of THz electronic devices.
From IF to BI: a tale of dependence and separation
Creators: name: Abramsky, Samson
name: Vaananen, Jouko
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic (math.LO)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We take a fresh look at the logics of informational dependence and independence of Hintikka and Sandu and Vaananen, and their compositional semantics due to Hodges. We show how Hodges' semantics can be seen as a special case of a general construction, which provides a context for a useful completeness theorem with respect to a wider class of models. We shed some new light on each aspect of the logic. We show that the natural propositional logic carried by the semantics is the logic of Bunched Implications due to Pym and O'Hearn, which combines intuitionistic and multiplicative connectives. This introduces several new connectives not previously considered in logics of informational dependence, but which we show play a very natural role, most notably intuitionistic implication. As regards the quantifiers, we show that their interpretation in the Hodges semantics is forced, in that they are the image under the general construction of the usual Tarski semantics; this implies that they are adjoints to substitution, and hence uniquely determined. As for the dependence predicate, we show that this is definable from a simpler predicate, of constancy or dependence on nothing. This makes essential use of the intuitionistic implication. The Armstrong axioms for functional dependence are then recovered as a standard set of axioms for intuitionistic implication. We also prove a full abstraction result in the style of Hodges, in which the intuitionistic implication plays a very natural rôle.
description: 28 pages, journal version
Longitudinal correlation of the triangular flow event plane in a hybrid approach with hadron and parton cascade initial conditions
Creators: name: Petersen, Hannah
name: Greiner, Carsten
name: Bhattacharya, Vivek
name: Bass, Steffen A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The longitudinal long-range correlations of the triangular flow event plane angles are calculated in a Boltzmann + hydrodynamics hybrid approach. The potential to disentangle different energy deposition scenarios is explored by utilizing two different transport approaches for the early non-equilibrium evolution. In the hadronic transport approach the particle production in high energy heavy ion reactions is mainly governed by string excitation and fragmentation processes which are absent in the parton cascade approach. We find that in both approaches the initial state shows a strong longitudinal correlation of the event plane angles which is diluted but still persists in the final state momentum space distributions of the produced particles. A ridge-like structure can also be caused by near-collinear gluon radiation in a parton cascade approach and does not necessarily prove longitudinal flux tubes in the initial state.
description: 5 pages, 6 figures, replaced with new version with correct labels and added references, conclusions are unchanged
The Logarithmic Sobolev Constant of The Lamplighter
Creators: name: Abakumov, Evgeny
name: Beaulieu, Anne
name: Blanchard, François
name: Fradelizi, Matthieu
name: Gozlan, Nathaël
name: Host, Bernard
name: Jeantheau, Thiery
name: Kobylanski, Magdalena
name: Lecué, Guillaume
name: Martinez, Miguel
name: Meyer, Mathieu
name: Mourgues, Marie-Hélène
name: Portal, Frédéric
name: Ribaud, Francis
name: Roberto, Cyril
name: Romon, Pascal
name: Roth, Julien
name: Samson, Paul-Marie
name: Vandekerkhove, Pierre
name: Youssfi, Abdellah
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We give estimates on the logarithmic Sobolev constant of some finite lamplighter graphs in terms of the spectral gap of the underlying base. Also, we give examples of application.
Magnetic calculus and semiclassical trace formulas
Creators: name: Helffer, Bernard
name: Purice, Radu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10, 81Q20, 35P15

description: The aim of these notes is to show how the magnetic calculus developed in \cite{MP, IMP1, IMP2, MPR, LMR} permits to give a new information on the nature of the coefficients of the expansion of the trace of a function of the magnetic Schrödinger operator whose existence was established in \cite{HR2}.
Microwave enhanced advanced oxidation treatment of organic slurries
Creators: name: Saha, Moutoshi
Publisher: name: University of British Columbia
Year: 2018

description: Microwave enhanced advanced oxidation process (MW-AOP) has been applied to treat different organic slurries that include sewage sludge, source separated organics (SSO), fats, oils and grease (FOG), and dairy manure (unscreened and liquid portion). The present research aimed at treatment of organic wastes to produce more suitable substrate for subsequent energy and resource recovery. In this study, MW-AOP effectively treated three sludge types: primary, a mixture of primary and secondary, and secondary sludge. Secondary sludge showed higher treatment efficiency than primary or mixed sludge. This study explored the impact of solids concentrations on the sludge treatment efficiency. Treatment of sludge with high solids content would allow to handle larger amounts of sludge at a given period and reduce heating cost per unit of sludge treated. MW-AOP was successful to treat thickened secondary sludge with up to 8% total solids content. MW-AOP treatment efficiency of SSO and FOG increased with higher temperature and hydrogen peroxide dosage. Fatty acids, compounds with carbonyl group and/or hydroxyl group in both initial and treated FOG samples were identified by gas chromatography-mass spectrometry. MW-AOP broke down long chain fatty acids in FOG by peroxidation mechanism. Treated SSO and FOG contained more soluble organics, volatile fatty acids, nutrients and lower molecular weight compounds and became less inhibitory to microorganisms. They became more suitable for subsequent anaerobic digestion. Unscreened dairy manure was treated with batch scale MW-AOP system at different pH conditions. Liquid portion of dairy manure was also treated with pilot scale continuous flow 25 kW MW-AOP system at different hydrogen peroxide dosage and pH conditions. Sets without acidification did not show any increase in ortho-P release for both batch and pilot scale system. To achieve high phosphorous release, better solids disintegration, and better settling and supernatant quality, a combination of microwave heating with high hydrogen peroxide dosage and acidic condition was required.
Infrastructure and Agricultural Trade in North and Latin America
Creators: name: Al-Maamari, Aaisha
name: Countryman, Amanda M.
name: Al-Maamari, Aaisha
name: Countryman, Amanda M.
Publisher: name: Unknown
Year: 2021
Subjects: subject: International Development
subject: International Relations/Trade
subject: international trade
subject: agriculture
subject: infrastructure

description: This research investigated the impact of hard infrastructure on food and agricultural trade among North and Latin American countries. We employed a modified gravity model of trade for food and agricultural imports to measure the potential impact of the quality of hard infrastructure on the prevalence and patterns of agricultural trade. Results suggest that the development of hard infrastructure by investing in new projects or renewing existing network systems can increase agricultural trade volume and enhance trade performance among North and Latin American countries.
A commercial macroalgae extract in a plant-protein rich diet diminished saturated fatty acids of Oncorhynchus mykiss walbaum fillets
Creators: name: Bruni, Leonardo
name: Secci, Giulia
name: Mancini, Simone
name: Faccenda, Filippo
name: Parisi, Giuliana
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Seaweeds are considered novel feed ingredients, nutraceutical compounds and source of pigments and proteins. They appear to possess bioactive properties, such as hypolipidemic, antioxidant and immune-stimulative actions; furthermore, their proteins are considered just as nutritious as terrestrial vegetables. In the present work, rainbow trout (Oncorhynchus mykiss Walbaum) was fed for 95 days with three diets: a fishmeal-based positive control diet (C+), a vegetable protein-based negative control diet (C−) and a diet similar to C − where 5% of soybean concentrate was replaced by a commercial blend of seaweeds (T). The monitored parameters were fish performance, physical and marketable characteristics, fillet oxidative status and fatty acid content. The estimated indices of enzyme activities involved in lipid metabolism were calculated. Fish performances were reduced in C − and T fish; C − and T fillet fatty acid (FA) profiles globally showed the same pattern and were distinct from C+, i.e. with a lower content of polyunsaturated FAs and a higher content of monounsaturated and polyunsaturated n6 FAs; contrarywise, saturated FAs were significantly lower in T group in comparison to the other two groups (p p Seaweeds are novel feed ingredients with nutraceutical propertiesSaturated fatty acids of rainbow trout fillets were lowered by seaweed inclusion in the dietEstimated desaturase activities of C18 and n3 fatty acids were higher in seaweed-fed trout Seaweeds are novel feed ingredients with nutraceutical properties Saturated fatty acids of rainbow trout fillets were lowered by seaweed inclusion in the diet Estimated desaturase activities of C18 and n3 fatty acids were higher in seaweed-fed trout
Optical excitation of Electron-Glasses
Creators: name: Ovadyahu, Z.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electron-glasses can be readily driven far from equilibrium by a variety of means. Several mechanisms to excite the system and their relative merits are reviewed. In this study we focus on the process of exciting electron-glasses by interaction with near infrared radiation. The efficiency of this protocol varies considerably among different electron-glasses, but it only weakly depends on their resistance at liquid helium temperatures. A dramatic enhancement of the excitation efficiency is observed upon doping crystalline indium-oxide with Au. Some enhancement is observed also in samples doped with Pb but this enhancement fades away with time unlike the situation in the Au-doped samples. Several structural and analytical tools are used to characterize the changes in the materials that may be responsible for these effects. Possible routes by which high-frequency electromagnetic fields take the system far from equilibrium are discussed.
description: 10 pages 12 figures
Insights into the mode of action of tannin-based feed additives in broiler chickens: looking for connections with the plasma metabolome and caecal microbiota
Creators: name: Brugaletta, Giorgio
name: Luise, Diana
name: De Cesare, Alessandra
name: Zampiga, Marco
name: Laghi, Luca
name: Trevisi, Paolo
name: Manfreda, Gerardo
name: Sirri, Federico
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Developmental Biology
subject: Plant Biology

description: This study assessed the effects of three tannin-based feed additives on the productive performance, foot-pad conditions, plasma metabolome, and caecal microbiota of meat-type chickens. A total of 2,340 male broilers were divided into 4 treatments (9 replicates each) fed either a commercial basal diet (CON) or the basal diet supplemented with one of the three tested products (A, B, or C) up to 49 days. According to manufacturers’ instructions, product A was added to the basal diet at 0.3% from 0 to 49 d, while B and C at 0.13% from 0 to 21 d and 0.12% from 22 to 49 d. Compared to CON, tannin-supplemented birds consumed less feed (6.59 vs. 6.37, 6.49, and 6.35 kg, for CON vs. A, B, and C, respectively; p p p Two tannin-based feed additives out of the three tested in this study significantly reduced feed intake and body weight gain of broiler chickens.The tannin-produced shifts in the plasma metabolome and caecal microbiota may have been two reasons for the productive performance depression.Further dose-response trials can help the poultry industry to better elucidate the role of tannins as feed supplements for broiler chickens. Two tannin-based feed additives out of the three tested in this study significantly reduced feed intake and body weight gain of broiler chickens. The tannin-produced shifts in the plasma metabolome and caecal microbiota may have been two reasons for the productive performance depression. Further dose-response trials can help the poultry industry to better elucidate the role of tannins as feed supplements for broiler chickens.
Intradermal injections through hollow microneedles
Creators: name: Shrestha, Pranav
Publisher: name: University of British Columbia
Year: 2018

description: Hollow microneedles are a promising alternative to conventional drug delivery techniques such as oral drug administration and hypodermic injections, and are used for delivering drugs and therapeutics into the skin. Although the benefits of intradermal drug delivery have been known for decades, our understanding of fluid absorption by skin tissue has been limited due to the difficulties in imaging a highly scattering biological material such as skin. In this thesis, we report the results from ex-vivo injection experiments into excised porcine skin tissue using hollow microneedles. We introduce the use of optical coherence tomography (OCT) for real-time imaging of skin tissue at the micro-scale during intradermal injections through hollow microneedles. We identify two modes of flow into the skin – microinjection, a region of high transient flow-rate, and microinfusion, a region of lower steady-state flow-rate. We relate the two modes of flow to tissue deformation. Using images from the OCT, we find that the skin tissue behaves like a deformable porous medium and absorbs fluid by locally expanding rather than rupturing to form a fluid filled cavity. We measure the strain distribution in a cross section of the tissue to quantify local tissue deformation using digital image correlation (DIC), and find that the amount of volumetric expansion of the tissue corresponds closely to the volume of fluid injected. Mechanically restricting the tissue expansion limits fluid absorption into the tissue, and allowing the tissue to expand leads to increased fluid absorption. Our experimental findings can provide physical insights for optimizing the delivery of drugs into the skin for different therapeutic applications, and for better modelling fluid flow into biological tissue.
Modelling effects of phytobiotic administration on coherent responses to Salmonella infection in laying hens
Creators: name: Narushin, Valeriy G.
name: Laptev, Georgi Yu.
name: Yildirim, Elena A.
name: Ilina, Larisa A.
name: Filippova, Valentina A.
name: Kochish, Ivan I.
name: Gorfunkel, Elena P.
name: Dubrovin, Andrei V.
name: Novikova, Natalia I.
name: Novikova, Oksana B.
name: Dunyashev, Timur P.
name: Smolensky, Vladimir I.
name: Surai, Peter F.
name: Bondarenko, Yuri V.
name: Griffin, Darren K.
name: Romanov, Michael N.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Pharmacology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Practice of layer poultry farming and commercial egg production relies on the optimal use and improvement of the welfare and genetically determined functional abilities of laying hens, their efficient intake of feed and its components, adaptation to housing conditions and resistance to infectious diseases including salmonellosis. Previous studies were focussed on relationships of chicken performance and resistance with the expression profiles of individual genes involved in metabolic processes and immune system, or with genetic markers that can be closely associated with these processes in chickens. In this study, mathematical models of coherent changes in laying hens were developed for the expression of eight genes involved in immunity and metabolism, on the one hand, and biochemical and immunological blood parameters, on the other hand, in response to Salmonella infection and administration of a phytobiotic Intebio. The proposed modelling approach can be a further basis for an in-depth research of the relationship between the gene expression, functional state and welfare of poultry, impact of pathogenic microorganisms and use of immunomodulatory drugs.HIGHLIGHTSImproved egg production and resistance rely on hens’ potential in gene expression and metabolism.We developed mathematical models for coherent responses of hens’ gene expression and blood indices to Salmonella infection and phytobiotic intake.This approach can be used for further studying relationship between gene expression, functional state, impact of pathogens and antimicrobial drugs. Improved egg production and resistance rely on hens’ potential in gene expression and metabolism. We developed mathematical models for coherent responses of hens’ gene expression and blood indices to Salmonella infection and phytobiotic intake. This approach can be used for further studying relationship between gene expression, functional state, impact of pathogens and antimicrobial drugs.
title: Quartierspiegel Höngg 2024
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 2024
Subjects: subject: 314 Allgemeine Statistiken zu Europa
subject: 710 Städtebau, Raumplanung, Landschaftsgestaltung
subject: 949 Geschichte anderer Teile Europas
subject: Zürich-Höngg
subject: Zürich / Kreis 10
subject: Quartier
subject: Amtliche Statistik
subject: Bevölkerungsstatistik

description: Noch bis ins 20. Jahrhundert wurde Höngg durch die Textilindustrie geprägt. Seither hat sich das Quartier faktisch zur reinen Wohngegend mit überdurchschnittlich vielen einkommensstarken Haushalten gewandelt: Wer in Höngg lebt, entscheidet sich für die gute Wohnlage mit Fernsicht – und wohl auch ein bisschen gegen das pulsierende Stadtleben.