cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An exploratory study of socio-technical congruence in an ecosystem of software developers
Creators: name: Azad, Deepak
Publisher: name: University of British Columbia
Year: 2014

description: Software is not built in isolation but builds on other software. When one project relies on software produced by another project, we say there is a technical dependence between the projects. The socio-technical congruence literature suggests that when there is a technical dependence there may need to be a social dependence. We investigate the alignment between social interactions and technical dependence in a software ecosystem. We performed an exploratory study of 250 Java projects on GitHub that use Maven for build dependences. We create a social interaction graph based on developers’ interactions on issue and pull requests. We compare the social interaction graph with a technical dependence graph representing library dependences between the projects in the ecosystem, to get an overview of the congruence, or lack thereof, between social interactions and technical dependences. We found that in 23.6% of the cases in which there is a technical dependence between projects there is also evidence of social interaction between project members. We found that in 8.67% of the cases in which there is a social interaction between project members, there is a technical dependence between projects. To better understand the situations in which there is congruence between the social and technical graphs, we examine pairs of projects that meet this criteria. We identify three categories of these project pairs and provide a quantitative and qualitative comparison of project pairs from each category. We found that for 45 (32%) of project pairs, no social interaction had taken place before the introduction of technical dependence and interactions after the introduction of the dependence are often about upgrading the library being depended upon. For 49 (35%) of project pairs, 75% of the interaction takes place after the introduction of the technical dependence. For the remaining 45 (32%) of project pairs, less than 75% of the interaction takes place after the introduction of the technical dependence. In the latter two cases, although there is interaction before the technical dependence is introduced, it is not always about the dependence.
Quantum Optimal Control Theory in the Linear Response Formalism
Creators: name: Castro, Alberto
name: Tokatly, I. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Quantum optimal control theory (QOCT) aims at finding an external field that drives a quantum system in such a way that optimally achieves some predefined target. In practice this normally means optimizing the value of some observable, a so called merit function. In consequence, a key part of the theory is a set of equations, which provides the gradient of the merit function with respect to parameters that control the shape of the driving field. We show that these equations can be straightforwardly derived using the standard linear response theory, only requiring a minor generalization -- the unperturbed Hamiltonian is allowed to be time-dependent. As a result, the aforementioned gradients are identified with certain response functions. This identification leads to a natural reformulation of QOCT in term of the Keldysh contour formalism of the quantum many-body theory. In particular, the gradients of the merit function can be calculated using the diagrammatic technique for non-equilibrium Green's functions, which should be helpful in the application of QOCT to computationally difficult many-electron problems.
description: 7 pages
A method of weak lensing reconstruction through cosmic magnification with multi-band photometry information
Creators: name: Ma, Ruijie
name: Zhang, Pengjie
name: Yu, Yu
name: Qin, Jian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Weak gravitational lensing induces flux dependent fluctuations in the observed galaxy number density distribution. This cosmic magnification (magnification bias) effect in principle enables lensing reconstruction alternative to cosmic shear and CMB lensing. However, the intrinsic galaxy clustering, which otherwise overwhelms the signal, has hindered its application. Through a scaling relation found by principal component analysis of the galaxy clustering in multi-band photometry space, we design a minimum variance linear estimator to suppress the intrinsic galaxy clustering and to reconstruct the lensing convergence map. In combination of the CosmoDC2 galaxy mock and the CosmicGrowth simulation, we test this proposal for a LSST-like galaxy survey with $ugrizY$ photometry bands. The scaling relation holds excellently at multipole $\ell<10^3$, and remains reasonably well to $\ell\sim 3000$. The linear estimator efficiently suppresses the galaxy intrinsic clustering, by a factor of $\sim 10^2$. For galaxies in the photo-z range $0.8= 200$. Its cross-correlation with cosmic shear of galaxies can achieve $S/N >= 200$. When the source redshift of cosmic shear galaxies $z_γ10^3$. This work further demonstrates the potential of lensing measurement through cosmic magnification to enhance the weak lensing cosmology.
description: 9 pages, 12 figures, accepted to MNRAS
Probing isolated compact remnants with microlensing
Creators: name: Sartore, N.
name: Treves, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We consider isolated compact remnants (ICoRs), i.e. neutrons stars and black holes that do not reside in binary systems and therefore cannot be detected as X-ray binaries. ICoRs may represent $\sim\,5$ percent of the stellar mass budget of the Galaxy, but they are very hard to detect. Here we explore the possibility of using microlensing to identify ICoRs. In a previous paper we described a simulation of neutron star evolution in phase space in the Galaxy, taking into account the distribution of the progenitors and the kick at formation. Here we first reconsider the evolution and distribution of neutron stars and black holes adding a bulge component. From the new distributions we calculate the microlensing optical depth, event rate and distribution of event time scales, comparing and contrasting the case of ICoRs and "normal stars". We find that the contribution of remnants to optical depth is slightly lower than without kinematics, owing to the evaporation from the Galaxy. On the other hand, the relative contribution to the rate of events is a factor $\sim\,5$ higher. In all, $\sim\,6-7$ percent of the events are likely related to ICoRs. In particular, $\sim\,30-40$ percent of the events with duration $>\,100$ days are possibly related to black holes. It seems therefore that microlensing observations are a suitable tool to probe the population of Galactic ICoRs.
description: 7 pages, 14 figures. Accepted for publication in Astronomy and Astrophysics
High-accuracy Casimir-Polder force calculations using the Discontinuous Galerkin Time-Domain method
Creators: name: Kristensen, Philip Trøst
name: Beverungen, Bettina
name: Intravaia, Francesco
name: Busch, Kurt
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe a numerical time-domain approach for high-accuracy calculations of Casimir-Polder forces near micro-structured materials. The use of a time-domain formulation enables the investigation of a broad range of materials described by advanced material models, including nonlocal response functions. We validate the method by a number of example calculations for which we thoroughly investigate the convergence properties of the method, and comparing to analytical reference calculations, we find average relative errors as low as a few parts in a million. As an application example, we investigate the anisotropy-induced repulsive behavior of the Casimir-Polder force near a sharp gold wedge described by a hydrodynamic Drude model.
description: 17 pages, 11 figures
3D induction log modelling with integral equation method and domain decomposition preconditioning
Creators: name: Saputera, Durra Handri
name: Jakobsen, Morten
name: van Dongen, Koen W. A.
name: Jahani, Nazanin
name: Eikrem, Kjersti Solberg
name: Alyaev, Sergey
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: Geophysics (physics.geo-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The deployment of electromagnetic (EM) induction tools while drilling is one of the standard routines for assisting the geosteering decision-making process. The conductivity distribution obtained through the inversion of the EM induction log can provide important information about the geological structure around the borehole. To image the 3D geological structure in the subsurface, 3D inversion of the EM induction log is required. Because the inversion process is mainly dependent on forward modelling, the use of fast and accurate forward modelling is essential. In this paper, we present an improved version of the integral equation (IE) based modelling technique for general anisotropic media with domain decomposition preconditioning. The discretised IE after domain decomposition equals a fixed-point equation that is solved iteratively with either the block Gauss-Seidel or Jacobi preconditioning. Within each iteration, the inverse of the block matrix is computed using a Krylov subspace method instead of a direct solver. An additional reduction in computational time is obtained by using an adaptive relative residual stopping criterion in the iterative solver. Numerical experiments show a maximum reduction in computational time of 35 per cent compared to solving the full-domain IE with a conventional GMRES solver. Additionally, the reduction of memory requirement for covering a large area of the induction tool sensitivity enables acceleration with limited GPU memory. Hence, we conclude that the domain decomposition method is improving the efficiency of the IE method by reducing the computation time and memory requirement.
description: This article is a manuscript submitted to Geophysical Journal International
X-ray Signatures of Non-Equilibrium Ionization Effects in Galaxy Cluster Accretion Shock Regions
Creators: name: Wong, Ka-Wah
name: Sarazin, Craig L.
name: Ji, Li
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The densities in the outer regions of clusters of galaxies are very low, and the collisional timescales are very long. As a result, heavy elements will be under-ionized after they have passed through the accretion shock. We have studied systematically the effects of non-equilibrium ionization for relaxed clusters in the LambdaCDM cosmology using one-dimensional hydrodynamic simulations. We found that non-equilibrium ionization effects do not depend on cluster mass but depend strongly on redshift which can be understood by self-similar scaling arguments. The effects are stronger for clusters at lower redshifts. We present X-ray signatures such as surface brightness profiles and emission lines in detail for a massive cluster at low redshift. In general, soft emission (0.3-1.0 keV) is enhanced significantly by under-ionization, and the enhancement can be nearly an order of magnitude near the shock radius. The most prominent non-equilibrium ionization signature we found is the O VII and O VIII line ratio. The ratios for non-equilibrium ionization and collisional ionization equilibrium models are different by more than an order of magnitude at radii beyond half of the shock radius. These non-equilibrium ionization signatures are equally strong for models with different non-adiabatic shock electron heating efficiencies. We have also calculated the detectability of the O VII and O VIII lines with the future International X-ray Observatory (IXO). Depending on the line ratio measured, we conclude that an exposure of ~130-380 ksec on a moderate-redshift, massive regular cluster with the X-ray Microcalorimeter Spectrometer (XMS) on the IXO will be sufficient to provide a strong test for the non-equilibrium ionization model.
description: 18 pages, 11 figures, accepted for publication in the Astrophysical Journal
Freezing Injury of Root Crops: Beets, Carrots, Parsnips, Radishes, and Turnips
Creators: name: Parsons, C. S.
name: Day, R. H.
name: Parsons, C. S.
name: Day, R. H.
Publisher: name: Unknown
Year: 1970
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Fresh vegetables that have been injured by freezing are usually more susceptible to decay, inferior in quality, and poorer in appearance than vegetables that have not been frozen. When the frozen produce is handled properly, however, the damage or loss caused by the freezing can often be reduced or eliminated. An understanding of the nature of freezing and the prompt and accurate identification of the injury are essential before the proper handling practices can be employed. The purpose of the studies reported here was to determine the effects of rapid and slow freezing and thawing on the overall quality of various root crops, and to identify, describe and illustrate the symptoms of freezing injury.
Inverse cascading for initial MHD turbulence spectra between Saffman and Batchelor
Creators: name: Brandenburg, Axel
name: Sharma, Ramkishor
name: Vachaspati, Tanmay
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In decaying magnetohydrodynamic (MHD) turbulence with a strong magnetic field, the spectral magnetic energy density is known to increase with time at small wavenumbers $k$, provided the spectrum at low $k$ is sufficiently steep. This process is called inverse cascading and occurs for an initial Batchelor spectrum, where the magnetic energy per linear wavenumber interval increases like $k^4$. For an initial Saffman spectrum that is proportional to $k^2$, however, inverse cascading has not been found in the past. We study here the case of an intermediate $k^3$ spectrum, which may be relevant for magnetogenesis in the early Universe during the electroweak epoch. This case is not well understood in view of the standard Taylor expansion of the magnetic energy spectrum for small $k$. Using high resolution MHD simulations, we show that also in this case there is inverse cascading with a strength just as expected from the conservation of the Hosking integral, which governs the decay of an initial Batchelor spectrum. Even for shallower $k^α$ spectra with spectral index $α>3/2$, our simulations suggest a spectral increase at small $k$ with time $t$ proportional to $t^{4α/9-2/3}$. The critical spectral index of $α=3/2$ is related to the slope of the spectral envelope in the Hosking phenomenology. Our simulations with $2048^3$ mesh points now suggest inverse cascading even for an initial Saffman spectrum.
description: 18 pages, 9 figures, 3 tables, submitted to J. Plasma Physics, improved evidence for inverse cascading for nonhelical $k^2$ spectrum
Quantum Walk with a four-dimensional coin
Creators: name: Hamilton, Craig S
name: Gabris, Aurel
name: Jex, Igor
name: Barnett, Stephen M
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the physical implementation of a discrete time quantum walk with a four-dimensional coin. Our quantum walker is a photon moving repeatedly through a time delay loop, with time being our position space. The quantum coin is implemented using the internal states of the photon: the polarization and two of the orbital angular momentum states. We demonstrate how to implement this physically and what components would be needed. We then illustrate some of the results that could be obtained by performing the experiment.
description: Final version is published in NJP
Verifying a quasi-classical spin model of perturbed quantum rewinding in a Fermi gas
Creators: name: Huang, J.
name: Royse, Camen A.
name: Arakelyan, I.
name: Thomas, J. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We systematically test a quasi-classical spin model of a large spin-lattice in energy space, with a tunable, reversible Hamiltonian and effective long-range interactions. The system is simulated by a weakly interacting Fermi gas undergoing perturbed quantum rewinding using radio-frequency(RF) pulses. The model reported here is found to be in a quantitative agreement with measurements of the ensemble-averaged energy-resolved spin density. This work elucidates the effects of RF detunings on the system and measurements, pointing the way to new correlation measurement methods.
description: 13 pages 8 figures
Three Nucleon Force Effects in Intermediate Energy Deuteron Analyzing Powers for dp Elastic Scattering
Creators: name: Sekiguchi, K.
name: Okamura, H.
name: Sakamoto, N.
name: Suzuki, H.
name: Dozono, M.
name: Maeda, Y.
name: Saito, T.
name: Sakaguchi, S.
name: Sakai, H.
name: Sasano, M.
name: Shimizu, Y.
name: Wakasa, T.
name: Yako, K.
name: Witała, H.
name: Glöckle, W.
name: Golak, J.
name: Kamada, H.
name: Nogga, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A complete high precision set of deuteron analyzing powers for elastic deuteron-proton ($dp$) scattering at 250 MeV/nucleon (MeV/N) has been measured. The new data are presented together with data from previous measurements at 70, 100, 135 and 200 MeV/N. They are compared with the results of three-nucleon (3N) Faddeev calculations based on modern nucleon-nucleon (NN) potentials alone or combined with two models of three nucleon forces (3NFs): the Tucson-Melbourne 99 (TM99) and Urbana IX. At 250 MeV/N large discrepancies between pure NN models and data, which are not resolved by including 3NFs, were found at c.m.\ backward angles of $θ_{\rm c.m.}\gtrsim 120^\circ$ for almost all the deuteron analyzing powers. These discrepancies are quite similar to those found for the cross section at the same energy. We found small relativistic effects that cannot resolve the discrepancies with the data indicating that other, short-ranged 3NFs are required to obtain a proper description of the data.
description: submitted to Phys. Rev. C
Photoelectric Color Sorting of Vine-Ripened Tomatoes
Creators: name: Gaffney, Jerome J.
name: Jahn, Otto L.
name: Gaffney, Jerome J.
name: Jahn, Otto L.
Publisher: name: Unknown
Year: 1970
Subjects: subject: Crop Production/Industries
subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: Increasing the level of shipments of vine-ripened tomatoes seems to depend on developing a marketing system that would insure a tomato of uniform quality, particularly with respect to color and maturity. The marketing of vine-ripened tomatoes has been improved with respect to color and maturity, but more improvement is necessary. Because of the high labor costs of color sorting tomatoes, and the importance of obtaining uniformity and consistency of color, research was conducted on photoelectric color sorting of vine-ripened tomatoes. The principal objectives of this research were (1) to test the use of photoelectric equipment for sorting vine-ripened tomatoes for color; (2) to conduct ripening studies of vine-ripened tomatoes sorted into color groups by photoelectric equipment; and (3) to study various factors associated with the commercial use of photoelectric equipment for this purpose.
A New Method for the Assessment of Age and Age-Spread of Pre-Main Sequence Stars in Young Stellar Associations of the Magellanic Clouds
Creators: name: Da Rio, Nicola
name: Gouliermis, Dimitrios A.
name: Gennaro, Mario
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a new method for the evaluation of the age and age-spread among pre-main-sequence (PMS) stars in star-forming regions in the Magellanic Clouds, accounting simultaneously for photometric errors, unresolved binarity, differential extinction, stellar variability, accretion and crowding. The application of the method is performed with the statistical construction of synthetic color-magnitude diagrams using PMS evolutionary models. We convert each isochrone into 2D probability distributions of artificial PMS stars in the CMD by applying the aforementioned biases that dislocate these stars from their original CMD positions. A maximum-likelihood technique is then applied to derive the probability for each observed star to have a certain age, as well as the best age for the entire cluster. We apply our method to the photometric catalog of ~2000 PMS stars in the young association LH 95 in the LMC, based on the deepest HST/ACS imaging ever performed toward this galaxy, with a detection limit of V~28, corresponding to M~0.2 Msun. Our treatment shows that the age determination is very sensitive to the considered grid of evolutionary models and the assumed binary fraction. The age of LH 95 is found to vary from 2.8 Myr to 4.4 Myr, depending on these factors. Our analysis allows us to disentangle a real age-spread from the apparent CMD-broadening caused by the physical and observational biases. We find that LH 95 hosts an age-spread well represented by a gaussian distribution with a FWHM of the order of 2.8 Myr to 4.2 Myr depending on the model and binary fraction. We detect a dependence of the average age of the system with stellar mass. This dependence does not appear to have any physical meaning, being rather due to imperfections of the PMS evolutionary models, which tend to predict lower ages for the intermediate masses, and higher ages for low-mass stars.
description: 19 pages, 16 figures, accepted for publication by the Astrophysical Journal
Ed-Fed: A generic federated learning framework with resource-aware client selection for edge devices
Creators: name: Sasindran, Zitha
name: Yelchuri, Harsha
name: Prabhakar, T. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Federated learning (FL) has evolved as a prominent method for edge devices to cooperatively create a unified prediction model while securing their sensitive training data local to the device. Despite the existence of numerous research frameworks for simulating FL algorithms, they do not facilitate comprehensive deployment for automatic speech recognition tasks on heterogeneous edge devices. This is where Ed-Fed, a comprehensive and generic FL framework, comes in as a foundation for future practical FL system research. We also propose a novel resource-aware client selection algorithm to optimise the waiting time in the FL settings. We show that our approach can handle the straggler devices and dynamically set the training time for the selected devices in a round. Our evaluation has shown that the proposed approach significantly optimises waiting time in FL compared to conventional random client selection methods.
Spring-block approach for nanobristle patterns
Creators: name: Járai-Szabó, Ferenc
name: Horvát, Emőke-Ágnes
name: Vajtai, Robert
name: Néda, Zoltán
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A two dimensional spring-block type model is used to model capillarity driven self-organization of nanobristles. The model reveals the role of capillarity and van der Waals forces in the pattern formation mechanism. By taking into account the relevant interactions several type of experimentally observed patterns are qualitatively well reproduced. The model offers the possibility to generate on computer novel nanobristle based structures, offering hints for designing further experiments.
description: 6 pages, 6 figures
Fuzzy Approach to Critical Bus Ranking under Normal and Line Outage Contingencies
Creators: name: Shankar, Shobha
name: Ananthapadmanabha, Dr. T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Identification of critical or weak buses for a given operating condition is an important task in the load dispatch centre. It has become more vital in view of the threat of voltage instability leading to voltage collapse. This paper presents a fuzzy approach for ranking critical buses in a power system under normal and network contingencies based on Line Flow index and voltage profiles at load buses. The Line Flow index determines the maximum load that is possible to be connected to a bus in order to maintain stability before the system reaches its bifurcation point. Line Flow index (LF index) along with voltage profiles at the load buses are represented in Fuzzy Set notation. Further they are evaluated using fuzzy rules to compute Criticality Index. Based on this index, critical buses are ranked. The bus with highest rank is the weakest bus as it can withstand a small amount of load before causing voltage collapse. The proposed method is tested on Five Bus Test System.
description: 12 pages, 7 figures, CCSIT Conference
Printed Materials (release 1)
Creators: name: Santucci, Raffaella
Publisher: name: Zenodo
Year: 2019

description: This document provides a short overview of the production of all print and presentation materials that will
 be used for the communication and dissemination of Q-SORT. It follows Q-SORT D6.3 Dissemination and
 Public Engagement Plan including graphic design guidelines (releases 1-2). All future printed materials for
 Q-SORT will be based on the designs and templates described in this document. Printed materials play a
 key role in dissemination and communication, as the first impression one gets of the project, which cannot
 be undone, is imparted by them.
 This document comprises four chapters.
 Chapter 1 is a short introduction.
 Chapter 2 provides a brief overview of the philosophy and process that were followed in designing the
 dissemination materials.
 Chapter 3 provides low-resolution copies of the above designs.
 Chapter 4 sums up the conclusions and take-home messages that were gleaned through this work.
The ground state phase diagram of the diluted ferromagnetic Kondo-lattice model
Creators: name: Stier, M.
name: Henning, S.
name: Nolting, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the existence of several (anti-)ferromagnetic phases in the diluted ferromagnetic Kondo-lattice model, i.e. ferromagnetic coupling of local moment and electron spin. To do this we use a coherent potential approximation (CPA) with a dynamical alloy analogy. For the CPA we need effective potentials, which we get first from a mean-field approximation. To improve this treatment we use in the next step a more appropriate moment conserving decoupling approach and compare both methods. The different magnetic phases are modelled by defining two magnetic sublattices. As a result we present zero-temperature phase diagrams according to the important model parameters and different dilutions.
description: accepted for publication in Journal of Physics: Condensed Matter
Testing the nonclassicality of gravity with the field of a single delocalized mass
Creators: name: Pesci, Alessandro
name: Pieri, Pierbiagio
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Most of the existing proposals for laboratory tests of a quantum nature of gravity are based on the use of two delocalized masses or harmonically bound masses prepared in pure quantum states with large enough spatial extent. Here a setup is proposed that is based on a single delocalized mass coupled to a harmonically trapped test mass (undergoing first expansion and then compression) that moves under the action of gravity. We investigate the in-principle feasibility of such an experiment, which turns out to crucially depend on the ability to tame Casimir-Polder forces. We thus proceed with a design aimed at achieving this, trying at the same time to take advantage of these forces rather than only fighting them.
description: 11 pages, 6 figures. v2: Final revision, corresponding to the published version
Training non-native aspirated plosives with hand gestures: learners’ gesture performance matters
Creators: name: Li, Peng
name: Xi, Xiaotong
name: Baills, Florence
name: Prieto, Pilar
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: This study investigates the impact of embodied training of pronunciation with visuospatial hand gestures cueing Mandarin aspirated plosives. Sixty-seven Catalan participants learned to pronounce and memorised novel Mandarin words containing non-native aspirated plosives with or without performing hand gestures. They were tested on perception, production, and word-meaning recognition in a pretest, an immediate, and a delayed posttest. Results show that participants who appropriately performed hand gestures gained enhanced voice onset time (VOT) values of the aspirated plosives and yielded a continuous improvement in the overall pronunciation of the target words. Furthermore, gestural training helped maintain word recognition accuracy after three days, while non-gestural training did not. These results suggest that appropriate gesture performance during training is crucial in maintaining the effects of L2 pronunciation training. Overall, the results highlight the relevance of embodied training for L2 pronunciation and the need to assess the learners’ gesture performance during the training.
Lifetime Observation of Cognition and Physiological Parameters in Male Mice
Creators: name: Kahnau, Pia
name: Guenther, Anja
name: Boon, Marcus Nicolaas
name: Terzenbach, Janine Denise
name: Hanitzsch, Eric
name: Lewejohann, Lars
name: Brust, Vera
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 610 Medizin und Gesundheit
subject: laboratory mice
subject: cognition
subject: IntelliCage
subject: lifetime observation
subject: resting metabolic rate

description: Laboratory mice are predominantly used for one experiment only, i.e., new mice are ordered or bred for every new experiment. Moreover, most experiments use relatively young mice in the range of late adolescence to early adulthood. As a consequence, little is known about the day-to-day life of adult and aged laboratory mice. Here we present a long-term data set with three consecutive phases conducted with the same male mice over their lifetime in order to shed light on possible long-term effects of repeated cognitive stimulation. One third of the animals was trained by a variety of learning tasks conducted up to an age of 606 days. The mice were housed in four cages with 12 animals per cage; only four mice per cage had to repeatedly solve cognitive tasks for getting access to water using the IntelliCage system. In addition, these learner mice were tested in standard cognitive tests outside their home-cage. The other eight mice served as two control groups living in the same environment but without having to solve tasks for getting access to water. One control group was additionally placed on the test set-ups without having to learn the tasks. Next to the cognitive tasks, we took physiological measures (body mass, resting metabolic rate) and tested for dominance behavior, and attractivity in a female choice experiment. Overall, the mice were under surveillance until they died a natural death, providing a unique data set over the course of virtually their entire lives. Our data showed treatment differences during the first phase of our lifetime data set. Young learner mice showed a higher activity, less growth and resting metabolic rate, and were less attractive for female mice. These effects, however, were not preserved over the long-term. We also did not find differences in dominance or effects on longevity. However, we generated a unique and valuable set of long-term behavioral and physiological data from a single group of male mice and note that our long-term data contribute to a better understanding of the behavioral and physiological processes in male C57Bl/6J mice.
Proximity of Iron Pnictide Superconductors to a Quantum Tricritical Point
Creators: name: Giovannetti, G.
name: Ortix, C.
name: Marsman, M.
name: Capone, M.
name: Brink, J. van den
name: Lorenzana, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We determine the nature of the magnetic quantum critical point in the doped LaFeAsO using a set of constrained density functional calculations that provide ab initio coefficients for a Landau order parameter analysis. The system turns out to be remarkably close to a quantum tricritical point, where the nature of the phase transition changes from first to second order. We compare with the effective field theory and discuss the experimental consequences.
description: 4 pages, 4 figures
Computerized adaptive testing: implementation issues
Creators: name: Antal, Margit
name: Erős, Levente
name: Imre, Attila
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences
subject: K.3.1
subject: 97U50

description: One of the fastest evolving field among teaching and learning research is students' performance evaluation. Computer based testing systems are increasingly adopted by universities. However, the implementation and maintenance of such a system and its underlying item bank is a challenge for an inexperienced tutor. Therefore, this paper discusses the advantages and disadvantages of Computer Adaptive Test (CAT) systems compared to Computer Based Test systems. Furthermore, a few item selection strategies are compared in order to overcome the item exposure drawback of such systems. The paper also presents our CAT system along its development steps. Besides, an item difficulty estimation technique is presented based on data taken from our self-assessment system.
Global Kruskal-Szekeres coordinates for Reissner-Nordström spacetime
Creators: name: Soltani, Farshid
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: I derive a smooth and global Kruskal-Szekeres coordinate chart for the maximal extension of the non-extremal Reissner-Nordström geometry that provides a generalization to the standard inner and outer Kruskal-Szekeres coordinates. The Kruskal-Szekeres diagram associated to this coordinate chart, whose existence is an interesting fact in and on itself, provides a simple alternative with a transparent physical interpretation to the conformal diagram of the spacetime.
description: 10 pages, 5 figures. v2: Added section and references
Decay mechanisms in CdS‐buffered Cu(In,Ga)Se2 thin‐film solar cells after exposure to thermal stress: Understanding the role of Na
Creators: name: Yetkin, Hasan A.
name: Kodalle, Tim
name: Bertram, Tobias
name: Villanueva‐Tovar, Alejandra
name: Rusu, Marin
name: Klenk, Reiner
name: Szyszka, Bernd
name: Schlatmann, Rutger
name: Kaufmann, Christian A.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 690 Hausbau, Bauhandwerk
subject: CdS buffer layer
subject: CIGSe
subject: degradation mechanism
subject: elemental interdiffusion
subject: Na
subject: SCAPS
subject: simulation
subject: thermal stress

description: Due to their tunable bandgap energy, Cu(In,Ga)Se2 (CIGSe) thin‐film solar cells are an attractive option for use as bottom devices in tandem configurations. In monolithic tandem devices, the thermal stability of the bottom device is paramount for reliable application. Ideally, it will permit the processing of a top device at the required optimum process temperature. Here, we investigate the degradation behavior of chemical bath deposited (CBD) CdS‐buffered CIGSe thin‐film solar cells with and without Na incorporation under thermal stress in ambient air and vacuum with the aim to gain a more detailed understanding of their degradation mechanisms. For the devices studied, we observe severe degradation after annealing at 300°C independent of the atmosphere. The electrical and compositional properties of the samples before and after a defined application of thermal stress are studied. In good agreement with literature reports, we find pronounced Cd diffusion into the CIGS absorber layer. In addition, for Na‐containing samples, the observed degradation can be mainly explained by the formation of Na‐induced acceptor states in the TCO front contact and a back contact barrier formation due to the out‐diffusion of Na. Supported by numerical device simulation using SCAPS‐1D, various possible degradation models are discussed and correlated with our findings.
title: Construction d'une famille d'éléments finis de IR2, de classe Cr, r ≥ 1, basée sur la subdivision de Clough-Tocher
Creators: name: HAUDIE, Jean-Stephane Inpké
Publisher: name: Université Felix HOUPHOUET BOIGNY
Year: 2019
Subjects: Schéma de Clough-Tocher
Fonctions splines
Éléments Finis.
MSC [2010] 65-D05
65-D07
65-D10

description: Dans cette thèse, nous construisons une famille d'éléments finis de classe Cr, r ≥1basée sur le triangle de type Clough-Tocher. Nous utilisons comme degrés de liberté, des dérivées d'ordre au plus r en chacun des sommets, d'ordre au plus r−2 au centre de gravité et des dérivées directionnelles d'ordre r en (r+12) points distincts situés l'intérieur de chaque arête du triangle. Le polynôme d'interpolation utilisé est globalement Cr, à support local, polynomial par morceaux et de degré au plus 2r + 1. Notre approche utilise essentiellement des algorithmes de subdivision et le principe de l'élévation du degré des polynômes de Bernstein-Bézier.
High-speed data transfer with FPGAs and QSFP+ modules
Creators: name: Ammendola, R.
name: Biagioni, A.
name: Chiodi, G.
name: Frezza, O.
name: Cicero, F. Lo
name: Lonardo, A.
name: Lunadei, R.
name: Paolucci, P. S.
name: Rossetti, D.
name: Salamon, A.
name: Salina, G.
name: Simula, F.
name: Tosoratto, L.
name: Vicini, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present test results and characterization of a data transmission system based on a last generation FPGA and a commercial QSFP+ (Quad Small Form Pluggable +) module. QSFP+ standard defines a hot-pluggable transceiver available in copper or optical cable assemblies for an aggregated bandwidth of up to 40 Gbps. We implemented a complete testbench based on a commercial development card mounting an Altera Stratix IV FPGA with 24 serial transceivers at 8.5 Gbps, together with a custom mezzanine hosting three QSFP+ modules. We present test results and signal integrity measurements up to an aggregated bandwidth of 12 Gbps.
description: 5 pages, 3 figures, Published on JINST Journal of Instrumentation proceedings of Topical Workshop on Electronics for Particle Physics 2010, 20-24 September 2010, Aachen, Germany(R Ammendola et al 2010 JINST 5 C12019)
Consumers' Knowledge and Use of Government Grades for Selected Food Items
Creators: name: Hutchinson, T. Q.
name: Hutchinson, T. Q.
Publisher: name: Unknown
Year: 1970
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: Competition
subject: Pricing
subject: Consumer-Grades
subject: Grading Agricultural Products
subject: Marketing
subject: Survey
subject: Inspections
subject: Food Products

description: In a national sample of households, interviews showed that consumers were unfamiliar with USDA grades for food. For the most part consumers evidenced little knowledge of Federal grades and significant confusion between the grades and inspection marks. The most frequent awareness score was zero. The study also indicates that many consumers believe all food items to be graded and frequently report buying Grade A when no such grade designation exists.
The Distribution of the Elements in the Galactic Disk II. Azimuthal and Radial Variation in Abundances from Cepheids
Creators: name: Luck, R. E.
name: Andrievsky, S. M.
name: Kovtyukh, V. V.
name: Gieren, W.
name: Graczyk, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This paper reports on the spectroscopic investigation of 101 Cepheids in the Carina region. These Cepheids extend previous samples by about 35% in number and increase the amount of the galactic disk coverage especially in the direction of l \approx 270°. The new Cepheids do not add much information to the radial gradient, but provide a substantial increase in azimuthal coverage. We find no azimuthal dependence in abundance over an 80° angle from the galactic center in an annulus of 1 kpc depth centered on the Sun. A simple linear fit to the Cepheid data yields a gradient d[Fe/H]/dRG = -0.055 \pm 0.003 dex/kpc which is somewhat shallower than found from our previous, smaller Cepheid sample.
description: 55 pages, 9 figures, Astronomical Journal in press
Dissemination and Public Engagement Plan including graphic design guidelines (release 2)
Creators: name: Santucci, Raffaella
Publisher: name: Zenodo
Year: 2019

description: This Dissemination and Public Engagement Plan provides an update of the dissemination strategy, activities,
 and materials that Q-SORT intends to use over the lifetime of the Project, with the goal of making it as visible
 as possible and of disseminating the Project’s results as widely as possible.
Mott physics in $2p$ electron dioxygenyl magnet : O$_{2}$$M$F$_{6}$ ($M$=Sb, Pt)
Creators: name: Kim, Minjae
name: Min, B. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have investigated electronic structures and magnetic properties of O$_{2}$$M$F$_{6}$ ($M$=Sb, Pt), which are composed of two building blocks of strongly correlated electrons: O$_{2}^{+}$ dioxygenyls and $M$F$_{6}^{-}$ octahedra, by employing the first-principles electronic structure band method. For O$_{2}$SbF$_{6}$, as a reference system of O$_{2}$PtF$_{6}$, we have shown that the Coulomb correlation of O(2$p$) electrons drives the Mott insulating state. For O$_{2}$PtF$_{6}$, we have demonstrated that the Mott insulating state is induced by the combined effects of the Coulomb correlation of O(2$p$) and Pt(5$d$) electrons and the spin-orbit (SO) interaction of Pt(5$d$) states. The role of the SO interaction in forming the Mott insulating state of O$_{2}$PtF$_{6}$ is similar to the case of Sr$_{2}$IrO$_{4}$ that is a prototype of a SO induced Mott system with J$_{eff}=1/2$.
description: 5 pages, 6 figures
A Novel Temporal Multi-Gate Mixture-of-Experts Approach for Vehicle Trajectory and Driving Intention Prediction
Creators: name: Yuan, Renteng
name: Abdel-Aty, Mohamed
name: Xiang, Qiaojun
name: Wang, Zijin
name: Zheng, Ou
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Accurate Vehicle Trajectory Prediction is critical for automated vehicles and advanced driver assistance systems. Vehicle trajectory prediction consists of two essential tasks, i.e., longitudinal position prediction and lateral position prediction. There is a significant correlation between driving intentions and vehicle motion. In existing work, the three tasks are often conducted separately without considering the relationships between the longitudinal position, lateral position, and driving intention. In this paper, we propose a novel Temporal Multi-Gate Mixture-of-Experts (TMMOE) model for simultaneously predicting the vehicle trajectory and driving intention. The proposed model consists of three layers: a shared layer, an expert layer, and a fully connected layer. In the model, the shared layer utilizes Temporal Convolutional Networks (TCN) to extract temporal features. Then the expert layer is built to identify different information according to the three tasks. Moreover, the fully connected layer is used to integrate and export prediction results. To achieve better performance, uncertainty algorithm is used to construct the multi-task loss function. Finally, the publicly available CitySim dataset validates the TMMOE model, demonstrating superior performance compared to the LSTM model, achieving the highest classification and regression results. Keywords: Vehicle trajectory prediction, driving intentions Classification, Multi-task
Laser emission with excitonic gain in a ZnO planar microcavity
Creators: name: Guillet, Thierry
name: Brimont, Christelle
name: Valvin, Pierre
name: Gil, Bernard
name: Bretagnon, Thierry
name: Medard, F.
name: Mihailovic, Martine
name: Zúñiga-Pérez, Jesús
name: Leroux, Mathieu
name: Semond, F.
name: Bouchoule, Sophie
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The lasing operation of a ZnO planar microcavity under optical pumping is demonstrated from T=80 K to 300 K. At the laser threshold, the cavity switches from the strong coupling to the weak coupling regime. A gain-related transition, which appears while still observing polariton branches and, thus, with stable excitons, is observed below 240K. This shows that exciton scattering processes, typical of II-VI semiconductors, are involved in the gain process.