cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric Aspects of the Moduli Space of Riemann Surfaces
Creators: name: Liu, Kefeng
name: Sun, Xiaofeng
name: Yau, Shin-Tung
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: DG, AG

description: This is a survey of our recent results on the geometry of moduli spaces and Teichmuller spaces of Riemann surfaces appeared in math.DG/0403068 and math.DG/0409220. We introduce new metrics on the moduli and the Teichmuller spaces of Riemann surfaces with very good properties, study their curvatures and boundary behaviors in great detail. Based on the careful analysis of these new metrics, we have a good understanding of the Kahler-Einstein metric from which we prove that the logarithmic cotangent bundle of the moduli space is stable. Another corolary is a proof of the equivalences of all of the known classical complete metrics to the new metrics, in particular Yau's conjectures in the early 80s on the equivalences of the Kahler-Einstein metric to the Teichmuller and the Bergman metric.
description: Survey article of our recent results on the subject. Typoes corrrected
Diffusion and transport of spin pulses in an $n$-type semiconductor quantum well
Creators: name: Jiang, L.
name: Weng, M. Q.
name: Wu, M. W.
name: Cheng, J. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We perform a theoretical investigation on the time evolution of spin pulses in an $n$-type GaAs (001) quantum well with and without external electric field at high temperatures by constructing and numerically solving the kinetic spin Bloch equations and the Poisson equation, with the electron-phonon, electron-impurity and electron-electron Coulomb scattering explicitly included. The effect of the Coulomb scattering, especially the effect of the Coulomb drag on the spin diffusion/transport is investigated and it is shown that the spin oscillations and spin polarization reverse along the direction of spin diffusion in the absence of the applied magnetic field, which were originally predicted in the absence of the Coulomb scattering by Weng and Wu [J. Appl. Phys. {\bf 93}, 410 (2003)], can sustain the Coulomb scattering at high temperatures ($\sim 200$ K). The results obtained are consistent with a recent experiment in bulk GaAs but at a very low temperature (4 K) by Crooker and Smith [Phys. Rev. Lett. {\bf 94}, 236601 (2005)].
description: 5 pages, 4 figures in eps format, to be published in J. Appl. Phys
title: Threshold based reduction of EMS stimulation artifacts in the electromyogram when stimulation intensity increases
Creators: name: Uhrhan, Katja
name: Jäger, Max
name: Witte, Hartmut
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
An Updated Trade Analysis of Wisconsin Counties for 2006
Creators: name: Deller, Steven C.
name: Deller, Steven C.
Publisher: name: Unknown
Year: 2007
Subjects: Public Economics

description: The intent of this functional research project is to apply the tools of Trade Area Analysis (TAA) to retail and service sales data for Wisconsin Counties. For this analysis we use the sales tax data as reported by the Wisconsin Department of Revenue for 2006, the most current year the data are available. Only those counties that have elected to collect the optional county sales tax are included in the analysis. Through Pull Factors and measures of Surplus and Leakage the relative strengths, and weaknesses, of local retail and service markets are identified.
Strain-stabilized superconductivity
Creators: name: Ruf, Jacob P.
name: Paik, Hanjong
name: Schreiber, Nathaniel J.
name: Nair, Hari P.
name: Miao, Ludi
name: Kawasaki, Jason K.
name: Nelson, Jocienne N.
name: Faeth, Brendan D.
name: Lee, Yonghun
name: Goodge, Berit H.
name: Pamuk, Betül
name: Fennie, Craig J.
name: Kourkoutis, Lena F.
name: Schlom, Darrell G.
name: Shen, Kyle M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Superconductivity is among the most fascinating and well-studied quantum states of matter. Despite over 100 years of research, a detailed understanding of how features of the normal-state electronic structure determine superconducting properties has remained elusive. For instance, the ability to deterministically enhance the superconducting transition temperature by design, rather than by serendipity, has been a long sought-after goal in condensed matter physics and materials science, but achieving this objective may require new tools, techniques and approaches. Here, we report the first instance of the transmutation of a normal metal into a superconductor through the application of epitaxial strain. We demonstrate that synthesizing RuO$_{2}$ thin films on (110)-oriented TiO$_{2}$ substrates enhances the density of states near the Fermi level, which stabilizes superconductivity under strain, and suggests that a promising strategy to create new transition-metal superconductors is to apply judiciously chosen anisotropic strains that redistribute carriers within the low-energy manifold of $d$ orbitals.
description: 30 pages, 20 figures (including supplemental information)
title: Flow and hemocompatibility study of straight-bladed impeller VADs
Creators: name: Figueiredo Soares, Victor
name: Stoeterau, Rodrigo
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Ventricular Assist Devices are continuous flow pumps that act as cardiac orthoses. The evaluation of the compatibility of such devices with blood involves, among other aspects, the study of thrombogenicity, hemolysis, and platelet activation. Computational Fluid Dynamics simulation is one of the tools used in this kind of evaluation. Thus, this work used Computational Fluid Dynamics simulations in the analysis of three Ventricular Assist Devices models under development, generating their velocity and pressure contours, their characteristic curves, and the distribution of shear stresses in their walls. A blood model has also been developed in order to estimate the damage inflicted on the blood by the devices. Steady-state simulations were performed, applying the Multiple Reference Frame method. The numerical blood modeling used the Lagrangean approach, with a discrete phase. The estimation of the damage on the blood was based on the relationship between the residence time of the discrete phase and the scalar shear stress. The prototype of one of the models was bench tested to validate the simulations. The simulation results relate the geometry of the models to the characteristics and magnitudes of the recirculation and stagnation regions and to the distribution of shear stresses. The energy performance of each pump and the blood damage index were used as comparison metrics between the devices.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
The Projected Belief Network Classfier : both Generative and Discriminative
Creators: name: Baggenstoss, Paul M
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The projected belief network (PBN) is a layered generative network with tractable likelihood function, and is based on a feed-forward neural network (FF-NN). It can therefore share an embodiment with a discriminative classifier and can inherit the best qualities of both types of network. In this paper, a convolutional PBN is constructed that is both fully discriminative and fully generative and is tested on spectrograms of spoken commands. It is shown that the network displays excellent qualities from either the discriminative or generative viewpoint. Random data synthesis and visible data reconstruction from low-dimensional hidden variables are shown, while classifier performance approaches that of a regularized discriminative network. Combination with a conventional discriminative CNN is also demonstrated.
Patenting, Commercialization, and US Academic Research in the 21st Century: The Resilience of Basic, Federally-Funded Open Science
Creators: name: Barham, Bradford L.
name: Foltz, Jeremy D.
name: Barham, Bradford L.
name: Foltz, Jeremy D.
Publisher: name: Unknown
Year: 2007
Subjects: Public Economics
Research Methods/ Statistical Methods

description: The life sciences have been the most dynamic area of US university research and commercialization efforts over the past twenty-five years. Using unique data from a large representative sample of life scientists this work examines whether academic patenting and commercialization complement, substitute for, or “hold-up” other research activities. The results highlight the resilience of the basic, federally-funded open scientific research model. Our findings, in turn, underscore the fundamental importance of maintaining the public funding and commitment to the academic, scientific enterprise.
title: Control for non-linear compliant actuation of an upper arm exoskeleton
Creators: name: Jäger, Max
name: Helbig, Thomas
name: Witte, Hartmut
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Musculoskeletal diseases of the back and upper extremities are one of the main causes of sick leave in Europe. Exoskeletons are one possible approach to preventive measures. The Biomechatronics Group at Technische Universität Ilmenau is developing an antagonistically actuated exoskeleton with non-linear compliance to support flexion and extension of the elbow in repetitive tasks like in assembly. Here, we present a control strategy to achieve joint stiffness control while benefitting from the advantages of non-linear compliant actuation. We use a decentralized control approach, combining two PID controllers to control joint position and string force and thus, joint stiffness, in the antagonistically acting drive. We show limitations and benefits of this approach through simulation and measurement.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Imperfect 1-out-of-2 quantum oblivious transfer: bounds, a protocol, and its experimental implementation
Creators: name: Amiri, Ryan
name: Stárek, Robert
name: Reichmuth, David
name: Puthoor, Ittoop V
name: Mičuda, Michal
name: Mišta, Ladislav
name: Dušek, Miloslav
name: Wallden, Petros
name: Andersson, Erika
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Oblivious transfer is an important primitive in modern cryptography. Applications include secure multiparty computation, oblivious sampling, e-voting, and signatures. Information-theoretically secure perfect 1-out-of 2 oblivious transfer is impossible to achieve. Imperfect variants, where both participants' ability to cheat is still limited, are possible using quantum means while remaining classically impossible. Precisely what security parameters are attainable remains unknown. We introduce a theoretical framework for studying semirandom quantum oblivious transfer, which is shown to be equivalent to regular oblivious transfer in terms of cheating probabilities. We then use it to derive bounds on cheating. We also present a protocol with lower cheating probabilities than previous schemes, together with its optical realization. We show that a lower bound of 2/3 on the minimum achievable cheating probability can be directly derived for semirandom protocols using a different method and definition of cheating than used previously. The lower bound increases from 2/3 to approximately 0.749 if the states output by the protocol are pure and symmetric. The oblivious transfer scheme we present uses unambiguous state elimination measurements and can be implemented with the same technological requirements as standard quantum cryptography. The cheating probabilities are 3/4 and approximately 0.729 for sender and receiver respectively, which is lower than in existing protocols. Using a photonic test-bed, we have implemented the protocol with honest parties, as well as optimal cheating strategies.
description: 22 pages, 1 figure, v2 moderate changes, published version
Additional file 2 of Evaluation of T-activated proteins as recall antigens to monitor Epstein–Barr virus and human cytomegalovirus-specific T cells in a clinical trial setting
Creators: name: Körber, Nina
name: Behrends, Uta
name: Protzer, Ulrike
name: Bauer, Tanja
Publisher: name: figshare
Year: 2020
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 2: Figure S2. Representative gating strategy for polychromatic intracellular cytokine staining assay.
Effective potential analytic continuation calculations of real time quantum correlation functions: Asymmetric systems
Creators: name: Horikoshi, Atsushi
name: Kinugawa, Kenichi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We apply the effective potential analytic continuation (EPAC) method to one-dimensional asymmetric potential systems to obtain the real time quantum correlation functions at various temperatures. Comparing the EPAC results with the exact results, we find that for an asymmetric anharmonic oscillator the EPAC results are in very good agreement with the exact ones at low temperature, while this agreement becomes worse as the temperature increases. We also show that the EPAC calculation for a certain type of asymmetric potentials can be reduced to that for the corresponding symmetric potentials.
description: RevTeX4, 13 pages, 9 eps figures
Magic Doping Fractions in High-Temperature Superconductors
Creators: name: Komiya, Seiki
name: Chen, Han-Dong
name: Zhang, Shou-Cheng
name: Ando, Yoichi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report hole-doping dependence of the in-plane resistivity ρ_{ab} in a cuprate superconductor La_{2-x}Sr_{x}CuO_{4}, carefully examined using a series of high-quality single crystals. Our detailed measurements find a tendency towards charge ordering at particular rational hole doping fractions of 1/16, 3/32, 1/8, and 3/16. This observation appears to suggest a specific form of charge order and is most consistent with the recent theoretical prediction of the checkerboard-type ordering of the Cooper pairs at rational doping fractions x = (2m+1)/2^n, with integers m and n.
description: 5 pages, 3 figure, resubmitted to Phys. Rev. Lett. The Tc vs. x diagram has been added and the discussions have been modified to focus more on the experimental results
Search for Continuous Gravitational Waves from the Central Compact Objects in Supernova Remnants Cassiopeia A, Vela Jr. and G347.3-0.5
Creators: name: Papa, M. Alessandra
name: Ming, Jing
name: Gotthelf, Eric V.
name: Allen, Bruce
name: Prix, Reinhard
name: Dergachev, Vladimir
name: Eggenstein, Heinz-Bernd
name: Singh, Avneet
name: Zhu, Sylvia J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform a sub-threshold follow-up search for continuous nearly-monochromatic gravitational waves from the central compact objects associated with the supernova remnants Vela Jr., Cassiopeia A, and SNR G347.3$-$0.5. Across the three targets, we investigate the most promising ~ 10,000 combinations of gravitational wave frequency and frequency derivative values, based on the results from an Einstein@Home search of the LIGO O1 observing run data, dedicated to these objects. The selection threshold is set so that a signal could be confirmed using the newly released O2 run LIGO data. In order to achieve best sensitivity we perform two separate follow-up searches, on two distinct stretches of the O2 data. Only one candidate survives the first O2 follow-up investigation, associated with the central compact object in SNR G347.3-0.5, but it is not conclusively confirmed. In order to assess a possible astrophysical origin we use archival X-ray observations and search for amplitude modulations of a pulsed signal at the putative rotation frequency of the neutron star and its harmonics. This is the first extensive electromagnetic follow-up of a continuous gravitational wave candidate performed to date. No significant associated signal is identified. New X-ray observations contemporaneous with the LIGO O3 run will enable a more sensitive search for an electromagnetic counterpart. A focused gravitational wave search in O3 data based on the parameters provided here should be easily able to shed light on the nature of this outlier. Noise investigations on the LIGO instruments could also reveal the presence of a coherent contamination.
description: 13 pages, 4 figures, accepted for publication in The Astrophysical Journal
Queering the body’(s) politic? : GSAs, citizenship and education
Creators: name: Macintosh, Lori B.
Publisher: name: University of British Columbia
Year: 2009

description: This qualitative study deals largely with exploring the role of GSAs in schools. The analysis asks why sexual minority youth and allied heterosexual youth are the primary resource for educating their peers, faculty members, administrators, school boards about issues homophobia in schools. Related to this, the thesis also takes up the issue of the school as a heteronormative space, and subsequently asks how heteronormative structures affect student understandings of citizenship curriculum, learning, and social change. The data consists of three individual interviews, and one group interview. In total there were six participants, four female, two male, of varying sexual orientations. All participants were youths between the ages 15-18; all were students in the Lower Mainland, and all were active members of their school's GSA. Queer theory and poststructural theory form the theoretical infrastructure of the study. Drawing from both theatrical frameworks, this study attempts to bridge the perceived gap between theoretical representations and applied, qualitative based analysis in the hopes of opening up a more fluid avenue of inquiry. By way of conclusion I suggest that while beneficial to individual students, GSAs have become a "band-aid" solution for the systemic problem of homophobia in schools. I also argue that GSAs ought not be the only mechanism through which GLBTQI education and pedagogies of inclusion are fostered. Further to this, I recommend that a reconceptualized understanding of citizenship discourse, inclusive of communities, belonging, and personal responsibility would offer productive avenues to engage with heteronormativism, and other normalizing mechanisms within the school environments.
Fluctuations of internal energy flow in a vibrated granular gas
Creators: name: Puglisi, A.
name: Visco, P.
name: Barrat, A.
name: Trizac, E.
name: van Wijland, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The non-equilibrium fluctuations of power flux in a fluidized granular media have been recently measured in an experiment [Phys. Rev. Lett. 92, 164301, 2004], which was announced to be a verification of the Fluctuation Relation (FR) by Gallavotti and Cohen. An effective temperature was also identified and proposed to be a useful probe for such non equilibrium systems. We explain these results in terms of a two temperature Poisson process. Within this model, supported by independent Molecular Dynamics simulations, power flux fluctuations do not satisfy the FR and the nature of the effective temperature is clarified. In the pursue of a hypothetical global quantity fulfilling the FR, this points to the need of considering other candidates than the power flux.
description: accepted for publication on Physical Review Letter
Stochastic approach to entropy production in chemical chaos
Creators: name: Gaspard, Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Methods are presented to evaluate the entropy production rate in stochastic reactive systems. These methods are shown to be consistent with known results from nonequilibrium chemical thermodynamics. Moreover, it is proved that the time average of the entropy production rate can be decomposed into the contributions of the cycles obtained from the stoichiometric matrix in both stochastic processes and deterministic systems. These methods are applied to a complex reaction network constructed on the basis of Roessler's reinjection principle and featuring chemical chaos.
Numerical Solutions of Inflating Higher Dimensional Global Defects
Creators: name: Shimono, Satsuki
name: Chiba, Takeshi
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We find numerical solutions of Einstein equations and scalar field equation for a global defect in higher dimensional spacetimes ($\geq 6$). We examine in detail the relation among the expansion rate $H$ and the symmetry-breaking scale $η$ and the number of extra dimensions $n$ for these solutions. We find that even if the extra dimensions do not have a cigar geometry, the expansion rate $H$ grows as $η$ increases, which is opposite to what is needed for the recently proposed mechanism for solving the cosmological constant problem. We also find that the expansion rate $H$ decreases as $n$ increases.
description: 6 pages, 7 figures, ReVTeX4, Accepted for publication in PRD
An Imaging Refractometer for Density Fluctuation Measurements in High Energy Density Plasmas
Creators: name: Hare, J. D.
name: Burdiak, G. C.
name: Merlini, S.
name: Chittenden, J. P.
name: Clayson, T.
name: Crilly, A. J.
name: Halliday, J. W. D.
name: Russell, D. R.
name: Smith, R. A.
name: Stuart, N.
name: Suttle, L. G.
name: Lebedev, S. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We report on a recently developed laser-probing diagnostic which allows direct measurements of ray-deflection angles in one axis, whilst retaining imaging capabilities in the other axis. This allows us to measure the spectrum of angular deflections from a laser beam which passes though a turbulent high-energy-density plasma. This spectrum contains information about the density fluctuations within the plasma, which deflect the probing laser over a range of angles. %The principle of this diagnostic is described, along with our specific experimental realisation. We create synthetic diagnostics using ray-tracing to compare this new diagnostic with standard shadowgraphy and schlieren imaging approaches, which demonstrates the enhanced sensitivity of this new diagnostic over standard techniques. We present experimental data from turbulence behind a reverse shock in a plasma and demonstrate that this technique can measure angular deflections between 0.06 and 34 mrad, corresponding to a dynamic range of over 500.
description: 5 pages, 4 figures. Prepared as a contributed paper for HTPD December 2020, RSI special edition
BO'LAJAK BOSHLANG'ICH SINF O'QITUVCHISINING METODIK TAYYORGARLIGINI TAKOMILLASHTIRISHNING PEDAGOGIK JIHATLARI
Creators: name: Yusupova, Shohzoda
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada boshlang‘ich sinf o‘qituvchisining kasbiy-metodik tayyorgarligini takomillashtirishning pedagogik jihatlari pedagogik muammo sifatida tadqiq qilingan.  Unda xorijiy va mahalliy tadqiqotchilarning fikrlari umumlashtirilgan. Boshlang‘ich sinf o‘qituvchilarini kasbiy rivojlantirish tamoyillari, nazariy va pedagogik jihatlari ilmiy asoslangan.
Shape, Color and Distance in Weak Gravitational Flexion
Creators: name: Fabritius, Joseph M.
name: Arena, Evan J.
name: Goldberg, David M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Canonically, elliptical galaxies might be expected to have a perfect rotational symmetry, making them ideal targets for flexion studies - however, this assumption hasn't been tested. We have undertaken an analysis of low and high redshift galaxy catalogs of known morphological type with a new gravitational lensing code, Lenser. Using color measurements in the u-r band and fit Sersic index values, objects with characteristics consistent with early-type galaxies are found to have a lower intrinsic scatter in flexion signal than late-type galaxies. We find this measured flexion noise can be reduced by more than a factor of two at both low and high redshift.
description: 7 pages, 13 figures, submitted to MNRAS
Heavy-quark production at large rapidities at hadron colliders
Creators: name: Andersen, J. R.
name: Del Duca, V.
name: Frixione, S.
name: Maltoni, F.
name: Stirling, W. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate heavy-quark production as a function of the rapidity interval between two heavy quarks in hadronic collisions. We compare the results relevant to bottom production at the Tevatron and at LHC, obtained using exact leading-order and NLO pQCD production, as well as the contribution of the 4b channel with and without the addition of BFKL gluon radiation.
description: 18 pages, 6 figures
Origin of Colossal Dielectric Response of Pr(0.6)Ca(0.4)MnO(3)
Creators: name: Biskup, N.
name: de Andres, A.
name: Martinez, J. L.
name: Perca, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the detailed study of dielectric response of Pr(0.6)Ca(0.4)MnO(3) (PCMO), member of manganite family showing colossal magnetoresistance. Measurements have been performed on four polycrystalline samples and four single crystals, allowing us to compare and extract the essence of dielectric response in the material. High frequency dielectric function is found to be 30, as expected for the perovskite material. Dielectric relaxation is found in frequency window of 20Hz-1MHz at temperatures of 50-200K that yields to colossal low-frequency dielectric function, i.e. static dielectric constant. Static dielectric constant is always colossal, but varies considerably in different samples from 1000 until 100000. The measured data can be simulated very well by blocking (surface barrier) capacitance in series with sample resistance. This indicates that the large dielectric constant in PCMO arises from the Schottky barriers at electrical contacts. Measurements in magnetic field and with d.c. bias support this interpretation. Weak anomaly at the charge ordering temperature can also be attributed to interplay of sample and contact resistance. We comment our results in the framework of related studies by other groups.
description: 7 pages 7 figures, minor revision of theoretical interpretation
A magnetar parallax
Creators: name: Ding, H.
name: Deller, A. T.
name: Lower, M. E.
name: Flynn, C.
name: Chatterjee, S.
name: Brisken, W.
name: Hurley-Walker, N.
name: Camilo, F.
name: Sarkissian, J.
name: Gupta, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: XTE J1810-197 (J1810) was the first magnetar identified to emit radio pulses, and has been extensively studied during a radio-bright phase in 2003$-$2008. It is estimated to be relatively nearby compared to other Galactic magnetars, and provides a useful prototype for the physics of high magnetic fields, magnetar velocities, and the plausible connection to extragalactic fast radio bursts. Upon the re-brightening of the magnetar at radio wavelengths in late 2018, we resumed an astrometric campaign on J1810 with the Very Long Baseline Array, and sampled 14 new positions of J1810 over 1.3 years. The phase calibration for the new observations was performed with two phase calibrators that are quasi-colinear on the sky with J1810, enabling substantial improvement of the resultant astrometric precision. Combining our new observations with two archival observations from 2006, we have refined the proper motion and reference position of the magnetar and have measured its annual geometric parallax, the first such measurement for a magnetar. The parallax of $0.40\pm0.05\,$mas corresponds to a most probable distance $2.5^{+0.4}_{-0.3}\,$kpc for J1810. Our new astrometric results confirm an unremarkable transverse peculiar velocity of $\approx200\,\mathrm{km~s^{-1}}$ for J1810, which is only at the average level among the pulsar population. The magnetar proper motion vector points back to the central region of a supernova remnant (SNR) at a compatible distance at $\approx70\,$kyr ago, but a direct association is disfavored by the estimated SNR age of ~3 kyr.
description: 10 pages, 3 figures, accepted for publication in MNRAS
Additional file 1 of Impact of guideline awareness in public pharmacies on counseling of patients with acute or chronic constipation in a survey of pharmacy personnel
Creators: name: Eberlin, Marion
name: Landes, Sabine
name: Doerthe Biber-Feiter
name: Michel, Martin C.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
title: Analytical modelling of a dynamic vibration absorber for Parkinson disease
Creators: name: Rincón Ruiz, Carlos
name: Alencastre, Jorge
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Parkinson is the most common neurodegenerative disease. It is characterized by the presence of involuntary tremor of human arms. Current treatments as pharmacological and surgery can be invasive for patients due to secondary effects and also high costs are required. In this sense, non-invasives devices have been proposed in order to reduce the tremor amplitude without secondary effects. These devices require a model in order to analyze the dynamic behavior and calculate the optimum parameters. In this article, it is developed an analytical three-dimensional model of a dynamic vibration absorber placed on a human arm. Results show dynamic vibration absorber is effective to reduce the tremor during voluntary motion. However, it is only effective while tremor frequencies are within a narrow range around the tuned frequency used for calculation of absorber parameters.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Additional file 1 of Proposal for a EN 149 acceptable reprocessing method for FFP2 respirators in times of severe shortage
Creators: name: Widmer, Andreas F.
name: Richner, Gilles
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Cancer
subject: Science Policy

description: Additional file 1.
Stationary States of a Random Copying Mechanism over a Complex Networks
Creators: name: Hidalgo, Cesar A.
name: Claro, Francisco
name: Marquet, Pablo A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: An analytical approach to network dynamics is used to show that when agents copy their state randomly the network arrives to a stationary status in which the distribution of states is independent of the agents degree. The effects of network topology on the process are characterized introducing a quantity called influence and studying its behavior for scale-free and random networks. We show that for this model degree averaged means are constant in time regardless of the number of states involved.
description: 11 pages, 3 Figures, article class
How pulse polarity and photoionization control streamer discharge development in long air gaps
Creators: name: Starikovskiy, Andrey Yu
name: Aleksandrov, Nikolay L
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A 2D approach is used to simulate the properties of positive and negative streamers emerging from a high-voltage electrode in a long (14 cm) air gap for standard pressure and temperature. The applied voltage varies from 100 to 500 kV. To reveal the influence of photoionization, the calculations are made for various rates of seed electron generation in front of the streamer head. The difference between the properties of positive and negative streamers is associated with the different directions of the electron drift ahead of the streamer head. As a result, the peak electric field at the streamer head and the streamer velocity are higher for positive voltage polarity. The average electric field in the negative streamer channel is approximately twice that in the positive streamer channel, in agreement with available measurements in long air gaps. It is shown that photoionization in front of the streamer head is important not only for the development of strong positive discharges, but for the development of strong negative discharges as well. An increase in the photoionization rate increases the propagation velocity of the positive streamer and retards the propagation of the negative streamer.
Doing freedom : an ethnography of an adult literacy centre
Creators: name: Soroke, Bonnie
Publisher: name: University of British Columbia
Year: 2009

description: My research is a study of the experiences and perceptions of the people of the Reading and Writing Centre in Duncan, BC. Based on a sociocultural perspective of literacy and using a framework of power, this ethnography explores what a dialogic, learning-centred literacy program looks like from the perspective of the people involved and asks : how are power and authority operating in this place? The purpose is to document the relationship dynamics of good adult basic education in a place where teachers and students say they are "doing freedom". The study shows how doing freedom within this educational environment means creating and maintaining a community relationship and a facilitative power system through the force of the teachers' philosophy and vision of a learner-run centre. The study builds on current research about participatory practices and student leadership within adult literacy programs. My analysis of the relationships amongst students and teachers is placed within the context of the politics of the North American literacy discourse. Analysis of the efficacy of the Reading and Writing Centre illuminates why the dominant literacy discourse is problematic and pushes us to critique the specific elements and ideas of individualism, the deficit model of adult literacy education and the narrow definition of literacy and literacy education. Since my research focus was to hear from students and teachers and to explore their perceptions of the Reading and Writing Centre, ethnographic research methods were chosen. I completed five months of fieldwork, with two-day visits to the Centre every week for participatory observation, interviews with nine students and two teachers, and two discussion groups with students. During the research process, artifacts were used as a tool for data generation, for reciprocity, and as a way of testing my ongoing analysis of the data. I created artifacts (in the forms of sculptures and diaoramas) to visually represent my responses and interpretation of the themes that were arising from my observations and interviews, and then shared several of the artifacts with people at the Centre. These artifacts depict issues in the research process, power dynamics amongst students and teachers and illustrate elements of my theoretical analysis. Research participants also created sculptures and dioramas during group discussions. My use of artifacts evolved to include them as a research presentation tool. The presentation of this ethnography and the ethnographic process involves an interactive installation of the artifacts with explanatory posters, followed by a participatory workshop that explores the implication of this study for literacy practice and practitioner research. This style of research presentation extends the accessibility to this ethnography beyond the academic community and creates opportunity for audience interaction and multiple-sensory engagement.
title: Development of a novel synthesis method of a rigid-body four-bar linkage into a compliant mechanism
Creators: name: Hermoza-Llanos, Estefania
name: Rodríguez Hernández, Jorge
name: Zentner, Lena
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: The four-bar linkage mechanism is widely used in various machinery applications. This study presents a synthesis method to transform a rigid-body four-bar mechanism into a compliant mechanism using four leaf-type hinges based on linear theory and Castigliano's Theorem. The objective is to determine the dimensions and configuration of a flexible four-bar mechanism that replicates the behavior of the initial rigid-body mechanism. The meeting point between the two mechanisms is the flexure hinge of the compliant mechanism, which is determined using the Pseudo-Rigid-Body model (PRBM). To validate the proposed method, a program based on non-linear theory is employed. The results confirm that the dimensional differences between the two are minimal, ranging from 0% to 0.13%. This study demonstrates the feasibility of synthesizing a Rigid-Body Four-Bar Mechanism into a compliant mechanism using the PRBM, as long as the deformations are within the linear domain.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Additional file 1 of Cervical cancer screening in rural Ethiopia: a cross- sectional knowledge, attitude and practice study
Creators: name: Ruddies, Friederike
name: Muluken Gizaw
name: Brhanu Teka
name: Thies, Sarah
name: Wienke, Andreas
name: Kaufmann, Andreas M.
name: Tamrat Abebe
name: Adamu Addissie
name: Kantelhardt, Eva Johanna
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Questionnaire for women. Questionnaire used within this study.
title: Weight reduction in lightweight structures of dynamically loaded systems by new energy dissipative elements in bolted joints
Creators: name: Rödiger, Silas
name: Könke, Carsten
name: Beinersdorf, Heiko
name: Kugler, Marion
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: In order to reduce vibration amplitudes, joint damping is being investigated at the MFPA Weimar and Fraunhofer IWM. It is intended to replace damping, often done by a frequency shift of naturals frequencies via added masses, and thus contribute to lightweight construction. To characterise the energy dissipation ability of joints, fretting wear tests with various parameter settings have been performed. In fretting wear tests, two material samples are set in relative motion with a constant normal force. Friction in the joint creates a friction-force-hysteresis, the area of which reflects the energy dissipation. The larger the hysteresis area, the greater the energy dissipation. Based on the experimental observations, a new material model is formulated to capture energy dissipation starting form micro slipping up to macro-slip situations in joints. Input parameters for the constitutive law are material pairing, the contact force, the frequency spectrum and the surface roughness. The constitutive law is defined in a finite element method (FEM) in intermediate elements between two friction bodies, where energy dissipation can be simulated for complex geometries. The numerical calculations are compared with validation experiments. Bolted joints are investigated as an application. The pressure distribution in the connection depends on the distance of the considered point to the bolt. According to distance, the constitutive law is variously implemented in the joint. Bolted joints exhibit both micro-slip (near the bolt shank) and macro-slip as relative motions, resulting in different friction states in the joint. Despite the displacement, the function must be maintained, which is why materials with low fretting wear are used. Figure 1 illustrates the relationship.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Optical spin initialization of spin-3/2 silicon vacancy centers in 6H-SiC at room temperature
Creators: name: Singh, Harpreet
name: Anisimov, Andrei N.
name: Breev, I. D.
name: Baranov, Pavel G.
name: Suter, Dieter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Silicon vacancies in silicon carbide have been proposed as an alternative to nitrogen vacancy centers in diamonds for spintronics and quantum technologies. An important precondition for these applications is the initialization of the qubits into a specific quantum state. In this work, we study the optical alignment of the spin 3/2 negatively charged silicon vacancy in 6H-SiC. Using a time-resolved optically detected magnetic resonance technique, we coherently control the silicon vacancy spin ensemble and measure Rabi frequencies and spin-lattice relaxation time of all three transitions. Then to study the optical initialization process of the silicon vacancy spin ensemble, the vacancy spin ensemble is prepared in different ground states and optically excited. We describe a simple rate equation model that can explain the observed behaviour and determine the relevant rate constants.
description: 11 pages, 12 figures
title: Design of the compound compliant Scott-Russel mechanism with non-conventional optimization of flexure hinges
Creators: name: Stojiljković, Dušan
name: Pavlović, Nenad
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: Compliant mechanisms gain some or all their mobility from the relative flexibility of their joints rather than from rigid-body joints only. Compliant mechanisms can provide many benefits in the solution of design problems: they have less wear, weight, noise, and backlash than their rigid-body counterparts. They can be manufactured from one piece of material, and therefore they are suitable to be applied in micromechanics. However, nonlinearities introduced by the large deflection of elastic segments further complicate the analysis of compliant mechanisms. This paper considers the isosceles slider–crank mechanism and its compliant counterpart mechanism, being developed based on the rigid–body mechanism. The design of the compound compliant slider-crank mechanism with circular flexure hinges notch, consisting of two single compliant slider-crank mechanisms has been shown in this paper. The guiding accuracy and mobility of the newly designed compliant mechanism have been analyzed. Additionally, by using undercut notch flexure hinges, a new analysis is given, which aims to show another factor that has an impact on the operation of compliant mechanisms. This factor is represented by the position of joints and its influence is shown through improving the accuracy of the coupler point rectilinear path of the Scott-Russel mechanism. Hence, it will be described that the position of these flexure hinges and their geometry is a vital issue for performing an approximately rectilinear path. Therefore, several designs are investigated through the finite elements method (FEM) simulation.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023
Understanding the Message Passing in Graph Neural Networks via Power Iteration Clustering
Creators: name: Li, Xue
name: Cheng, Yuanzhi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The mechanism of message passing in graph neural networks (GNNs) is still mysterious. Apart from convolutional neural networks, no theoretical origin for GNNs has been proposed. To our surprise, message passing can be best understood in terms of power iteration. By fully or partly removing activation functions and layer weights of GNNs, we propose subspace power iteration clustering (SPIC) models that iteratively learn with only one aggregator. Experiments show that our models extend GNNs and enhance their capability to process random featured networks. Moreover, we demonstrate the redundancy of some state-of-the-art GNNs in design and define a lower limit for model evaluation by a random aggregator of message passing. Our findings push the boundaries of the theoretical understanding of neural networks.
title: Theoretical considerations on 3D tensegrity joints for the use in manipulation systems
Creators: name: Herrmann, David
name: Schaeffer, Leon
name: Zentner, Lena
name: Böhm, Valter
Publisher: name: ilmedia
Year: 2023
Subjects: subject: 620

description: This paper presents a comprehensive analysis of a three-dimensional compliant tensegrity joint structure, examining its actuation, kinematics, and response to external loads. The study investigates a baseline configuration and two asymmetric variants of the joint. The relationship between the shape parameter and the parameters of the tensioned segments is derived, enabling the mathematical description of cable lengths for joint actuation. Geometric nonlinear static finite element simulations are performed to analyze the joint's response under various load conditions. The results reveal the joint's range of motion, the effect of different stiffness configurations, and its deformation behavior under external forces. The study highlights the asymmetric nature of the joint and its potential for targeted motion restriction. These findings advance the general understanding of the behavior of the considered tensegrity joint and provide valuable insights for their design and application in soft robotic systems.
description: Engineering for a changing world: Proceedings : 60th ISC, Ilmenau Scientific Colloquium, Technische Universität Ilmenau, September 04-08, 2023