cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermal conductivity of iron and nickel during melting: Implication to Planetary liquid outer core
Creators: name: Saha, Pinku
name: Mukherjee, Goutam Dev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We report the measurements of the thermal conductivity ($κ$) of iron (Fe) and nickel (Ni) at high pressures and high temperatures. $κ$ values are estimated from the temperature measurements across the sample surface in a laser heated diamond anvil cell (LHDAC) and using the COMSOL software. Near-isothermal $κ$'s are observed to increase with pressure in both the metals due to the increase of density of the pressed metals. In both metals $κ$'s are observed to follow a sharp fall during melting at different pressure points and are consistence with the other multi-anvil measurements. Constant values of $κ$ in these metals during melting at different pressures reveal the loss of long range order, which creates independent movement of atomic metals. The melting temperature measured in these metals from the sudden drop of $κ$-values are in a good agreement with the other melting measurements in LHDAC. The results obtained in this study is expected to provide an insight to the studies on the planets Mercury and Mars and their interior.
Galactic Winds across the Gas-Rich Merger Sequence II. Lyman Alpha Emission and Highly Ionized O VI and N V Outflows in Ultraluminous Infrared Galaxies
Creators: name: Liu, Weizhe
name: Veilleux, Sylvain
name: Rupke, David S. N.
name: Tripp, Todd M.
name: Hamann, Frederick
name: Martin, Crystal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper is the second in a series aimed at examining the gaseous environments of z$\le$0.3 quasars and ultraluminous infrared galaxies (ULIRGs) as a function of AGN/host galaxy properties across the merger sequence. This second paper focuses on the Ly$α$ emission and O VI and N V absorption features, tracers of highly ionized gas outflows, in ULIRGs observed with HST/COS. Ly$α$ emission is detected in 15 out of 19 ULIRGs, and 12 of the 14 clear Ly$α$ detections show emission with blueshifted velocity centroids and/or wings. The equivalent widths of the Ly$α$ emission increase with increasing AGN luminosities and AGN bolometric fractions. The blueshifts of the Ly$α$ emission correlate positively with those of the [O III] emission, where the latter traces the ionized gas outflows. The Ly$α$ escape fractions tend to be slightly larger in objects with stronger AGN and larger outflow velocities, but they do not correlate with nebular line reddening. Among the 12 ULIRGs with good continuum signal-to-noise ratios, O VI and/or N V absorption features are robustly detected in 6 of them, all of which are blueshifted, indicative of outflows. In the combined ULIRG $+$ quasar sample, the outflows are more frequently detected in the X-ray weak or absorbed sources. The absorption equivalent widths, velocities and velocity dispersions of the outflows are also higher in the X-ray weak sources. No other strong correlations are visible between the properties of the outflows and those of the AGN or host galaxies.
description: Accepted for publication in ApJ. 32 pages, 16 figures, and 9 tables. Comments are more than welcome!
title: Metrologie für Industrie und Mittelstand (Auszug aus: PTB-Mitteilungen 2015, Band 125, Heft 1. ISSN 0030-834X)
Creators: name: Smandek, Bernhard
Publisher: name: Physikalisch-Technische Bundesanstalt (PTB)
Year: 2015
Subjects: subject: Metrologie
subject: Technologietransfer
subject: Innovation
subject: Industrie-Dienstleistungen
subject: Patente
subject: Patente aus PTB-Entwicklungen
subject: Lizenzen
subject: lizenzierte PTB-Entwicklungen
subject: Angebote zum Technologietransfer im Bereich Sensorik und Elektronik
subject: Angebote zum Technologietransfer im Bereich Produktionstechnik
subject: Angebote zum Technologietransfer im Bereich Optik
subject: Angebote zum Technologietransfer im Bereich Mikro- und Nanotechnologie
subject: Angebote zum Technologietransfer im Bereich Medizintechnik
subject: Technologie- und Patentangebote
subject: Kooperation mit der PTB
subject: Existenzgründungen mit PTB-Technologien
subject: Patentverwertung
subject: Wissenstransfer
subject: Erfolgsgeschichten mit PTB-Technologien
subject: Technologieentwicklung in Zusammenarbeit mit der Industrie
subject: PTB-Kooperation mit kleinen und mittelständischen Unternehmen (KMU)
subject: Standardisierung neuer Technologien
subject: Patente zum Investitionsschutz
subject: Technologie- und Patentlizenzierung
subject: wirtschaftlicher Erfolg durch Kooperation mit der PTB

description: PTB-Mitteilungen. Band 125 (2015), Heft 1. ISSN 0030-834X
Disentangling the Signatures of Blended-Light Atmospheres in L/T Transition Brown Dwarfs
Creators: name: Ashraf, Afra
name: Gagliuffi, Daniella C. Bardalez
name: Manjavacas, Elena
name: Vos, Johanna M.
name: Mechmann, Claire
name: Faherty, Jacqueline K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: J.2; G.1.0; I.5.3
subject: 85-08, 85-11

description: We present a technique to identify spectrophotometrically variable L7-T3 brown dwarfs with single-epoch, low-resolution, near-infrared SpeX spectra. We calculated spectral indices on known variable brown dwarfs and used them to select 11 index-index parameter spaces where known variables can be distinguished from the rest of the general population of brown dwarfs. We find 62 candidate variables, 12 of which show significant variability amplitude in independent photometric monitoring surveys. This technique constitutes the first formal method to identify a time-dependent effect such as variability from peculiarities in their integrated light spectra. This technique will be a useful tool to prioritize targets for future photometric and spectroscopic monitoring in the era of JWST and 30m-class telescopes.
description: 52 pages, 4 figures
Floodlight Quantum Key Distribution: Demonstrating a New Framework for High-Rate Secure Communication
Creators: name: Zhang, Zheshen
name: Zhuang, Quntao
name: Wong, Franco N. C.
name: Shapiro, Jeffrey H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Floodlight quantum key distribution (FL-QKD) is a radically different QKD paradigm that can achieve Gbit/s secret-key rates over metropolitan area distances without multiplexing [Phys. Rev. A 94, 012322 (2016)]. It is a two-way protocol that transmits many photons per bit duration and employs a high-gain optical amplifier, neither of which can be utilized by existing QKD protocols to mitigate channel loss. FL-QKD uses an optical bandwidth that is substantially larger than the modulation rate and performs decoding with a unique broadband homodyne receiver. Essential to FL-QKD is Alice's injection of photons from a photon-pair source--in addition to the light used for key generation--into the light she sends to Bob. This injection enables Alice and Bob to quantify Eve's intrusion and thus secure FL-QKD against collective attacks. Our proof-of-concept experiment included 10 dB propagation loss--equivalent to 50 km of low-loss fiber--and achieved a 55 Mbit/s secret-key rate (SKR) for a 100 Mbit/s modulation rate, as compared to the state-of-the-art system's 1 Mbit/s SKR for a 1 Gbit/s modulation rate [Opt. Express 21, 24550-24565 (2013)], representing ~500-fold and ~50-fold improvements in secret-key efficiency (SKE) (bits per channel use) and SKR (bits per second), respectively.
description: 11 pages, 6 figures, 1 table
Quantum state estimation when qubits are lost: A no-data-left-behind approach
Creators: name: Williams, Brian P.
name: Lougovski, Pavel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present an approach to Bayesian mean estimation of quantum states using hyperspherical parametrization and an experiment-specific likelihood which allows utilization of all available data, even when qubits are lost. With this method, we report the first closed-form Bayesian mean estimate for the ideal single qubit. Due to computational constraints, we utilize numerical sampling to determine the Bayesian mean estimate for a photonic two-qubit experiment in which our novel analysis reduces burdens associated with experimental asymmetries and inefficiencies. This method can be applied to quantum states of any dimension and experimental complexity.
description: 28 pages. Revision includes, in part, changes to the ideal single-qubit MLE section
Einselection, Equilibrium and Cosmology
Creators: name: Albrecht, Andreas
name: Baunach, Rose
name: Arrasmith, Andrew
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Our observed Universe has a very strong arrow of time rooted in its low entropy starting point. This low entropy start can be related to various "tuning puzzles" about the early state of the Universe. Here we explore the relationship between the arrow of time and the emergence of classical from quantum in the hopes of ultimately gaining insights into cosmological initial conditions. Our focus is on einselection, the process whereby interactions with an environment select preferred states for a quantum system. This process plays an essential role in the emergence of classical from quantum. Studies of einselection have so far been limited to cases that exhibit an arrow of time. Here we study the ability of equilibrium systems to exhibit einselection -- and investigate whether detailed balance prevents this -- motivated by the question of whether classicality requires an arrow of time. We present calculations in the adapted Caldeira-Leggett model which demonstrate that einselection can indeed take place in equilibrium systems, and show how this phenomenon is tied to histories which express an arrow of time, despite the global equilibrium. We discuss some interesting implications of our results for cosmology and cosmological initial conditions. We are intrigued and a bit surprised by the role the consistent histories formalism has ended up playing in our analysis.
description: 19 pages, 14 figures, 2 appendices. V2: Final version accepted for publication in PRD. A number of edits have been made to improve the clarity of our discussion. Our results and conclusions are unchanged
Tight uncertainty relations for cycle currents
Creators: name: Polettini, Matteo
name: Falasco, Gianmaria
name: Esposito, Massimiliano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Several recent inequalities bound the precision of a current - counting net number of transitions in a system - by a thermodynamic measure of dissipation. However, while currents may be defined locally, dissipation is a global property. Inspired by the fact that ever since Carnot cycles are the unit elements of thermodynamic processes, we prove similar bounds tailored to cycle currents - counting net cycle completions - in terms of their conjugate affinities. We show that these inequalities are stricter than previous ones, even far from equilibrium, and that they allow to tighten those on transition currents. We illustrate our results with a simple model and discuss some technical and conceptual issues related to shifting attention from transition to cycle observables.
description: 5 pages, 3 figures
The combined effect of precession and convection on the dynamo action
Creators: name: Wei, Xing
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: To understand the generation of the Earth's and planetary magnetic fields, we investigate numerically the combined effect of precession and convection on the dynamo action in a spherical shell. The convection alone, the precession alone and the combined effect of convection and precession are studied at the low Ekman number at which the precessing flow is already unstable. The key result is that although the precession or convection alone is not strong to support the dynamo action the combined effect of precession and convection can support the dynamo action because of the resonance of precessional and convective instabilities. This result may interpret why the geodynamo maintains for such a long history compared to the Martian dynamo.
description: 4 figures
Nonlinear Model Reduction in Power Systems by Balancing of Empirical Controllability and Observability Covariances
Creators: name: Qi, Junjian
name: Wang, Jianhui
name: Liu, Hui
name: Dimitrovski, Aleksandar D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, nonlinear model reduction for power systems is performed by the balancing of empirical controllability and observability covariances that are calculated around the operating region. Unlike existing model reduction methods, the external system does not need to be linearized but is directly dealt with as a nonlinear system. A transformation is found to balance the controllability and observability covariances in order to determine which states have the greatest contribution to the input-output behavior. The original system model is then reduced by Galerkin projection based on this transformation. The proposed method is tested and validated on a system comprised of a 16-machine 68-bus system and an IEEE 50-machine 145-bus system. The results show that by using the proposed model reduction the calculation efficiency can be greatly improved; at the same time, the obtained state trajectories are close to those for directly simulating the whole system or partitioning the system while not performing reduction. Compared with the balanced truncation method based on a linearized model, the proposed nonlinear model reduction method can guarantee higher accuracy and similar calculation efficiency. It is shown that the proposed method is not sensitive to the choice of the matrices for calculating the empirical covariances.
description: Accepted by IEEE Transactions on Power Systems
Black Hole Mass Measurements of Early-Type Galaxies NGC 1380 and NGC 6861 Through ALMA and HST Observations and Gas-Dynamical Modeling
Creators: name: Kabasares, K. M.
name: Barth, A. J.
name: Buote, D. A.
name: Boizelle, B. D.
name: Walsh, J. L.
name: Baker, A. J.
name: Darling, J.
name: Ho, L. C.
name: Cohn, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 2 observations of CO(2-1) emission from the circumnuclear disks in two early-type galaxies, NGC 1380 and NGC 6861. The disk in each galaxy is highly inclined ($i\,{\sim}\,75^{\circ}$), and the projected velocities of the molecular gas near the galaxy centers are ${\sim}300\,\mathrm{km \, s^{-1}}$ in NGC 1380 and ${\sim}500\,\mathrm{km \, s^{-1}}$ in NGC 6861. We fit thin disk dynamical models to the ALMA data cubes to constrain the masses of the central black holes (BHs). We created host galaxy models using Hubble Space Telescope images for the extended stellar mass distributions and incorporated a range of plausible central dust extinction values. For NGC 1380, our best-fit model yields $M_{\mathrm{BH}} = 1.47 \times 10^8\,M_{\odot}$ with a ${\sim}40\%$ uncertainty. For NGC 6861, the lack of dynamical tracers within the BH's sphere of influence due to a central hole in the gas distribution precludes a precise measurement of $M_{\mathrm{BH}}$. However, our model fits require a value for $M_{\mathrm{BH}}$ in the range of $(1-3) \times 10^9\,M_{\odot}$ in NGC 6861 to reproduce the observations. The BH masses are generally consistent with predictions from local BH-host galaxy scaling relations. Systematic uncertainties associated with dust extinction of the host galaxy light and choice of host galaxy mass model dominate the error budget of both measurements. Despite these limitations, the measurements demonstrate ALMA's ability to provide constraints on BH masses in cases where the BH's projected radius of influence is marginally resolved or the gas distribution has a central hole.
description: 27 pages, 11 figures, accepted for publication in ApJ
Facies contrasts and their origins in scoria cones, maars and tuff rings of the newer volcanics province, Western Victoria, Australia
Creators: name: Edney, Warren Joseph.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Universal quantum computation with symmetric qubit clusters coupled to an environment
Creators: name: Boudreault, Christian
name: Eleuch, Hichem
name: Hilke, Michael
name: MacKenzie, Richard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: One of the most challenging problems for the realization of a scalable quantum computer is to design a physical device that keeps the error rate for each quantum processing operation low. These errors can originate from the accuracy of quantum manipulation, such as the sweeping of a gate voltage in solid state qubits or the duration of a laser pulse in optical schemes. Errors also result from decoherence, which is often regarded as more crucial in the sense that it is inherent to the quantum system, being fundamentally a consequence of the coupling to the external environment. Grouping small collections of qubits into clusters with symmetries can protect parts of the calculation from decoherence. We use 4-level cores with a straightforward generalization of discrete rotational symmetry, omega-rotation invariance, to encode pairs of coupled qubits and universal 2-qubit logical gates. We include quantum errors as a main source of decoherence, and show that symmetry makes logical operations particularly resilient to untimely anisotropic qubit rotations. We propose a scalable scheme for universal quantum computation where cores play the role of quantum-computational transistors, quansistors. Initialization and readout are achieved by coupling to leads. The external leads are explicitly considered and are assumed to be the other main source of decoherence. We show that quansistors can be dynamically decoupled from the leads by tuning their internal parameters, giving them the versatility required to act as controllable quantum memory units. With this dynamical decoupling, logical operations within quansistors are also symmetry-protected from unbiased noise in their parameters. We identify technologies that could implement omega-rotation invariance. Many of our results can be generalized to higher-level omega-rotation-invariant systems, or adapted to clusters with other symmetries.
description: 23 pages, 19 figures
From quantum mechanics to finance: Microfoundations for jumps, spikes and high volatility phases in diffusion price processes
Creators: name: Henkel, Christof
Publisher: name: arXiv
Year: 2016
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: General Economics (econ.GN)
subject: FOS: Economics and business
subject: 60F05, 60J60, 60K35, 91D30, 91B69, 91B80

description: We present an agent behavior based microscopic model that induces jumps, spikes and high volatility phases in the price process of a traded asset. We transfer dynamics of thermally activated jumps of an unexcited/ excited two state system discussed in the context of quantum mechanics to agent socio-economic behavior and provide microfoundations. After we link the endogenous agent behavior to price dynamics we establish the circumstances under which the dynamics converge to an Itô-diffusion price processes in the large market limit.
description: arXiv admin note: text overlap with arXiv:1606.08269
Quantum information of the Aharanov-Bohm ring with Yukawa interaction in the presence of disclination
Creators: name: Edet, C. O.
name: Lima, F. C. E.
name: Almeida, C. A. S.
name: Ali, N.
name: Asjad, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the quantum information by a theoretical measurement approach of an Aharanov-Bohm (AB) ring with Yukawa interaction in curved space with disclination. It obtained the so-called Shannon entropy, through the eigenfunctions of the system. The quantum states considered come from a Schroedinger theory with the AB field in the background of curved space. With this entropy, it can explore the quantum information at the position space and reciprocal space. Furthermore, we discussed how the magnetic field, the AB flux, and the topological defect influence the quantum states and the information entropy.
description: 8 pages, 2 captioned figures, 2 tables
SWAG Newsletter, Vol. 04, No. 02 (February, 1977)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
Enhanced van der Waals epitaxy via electron transfer-enabled interfacial dative bond formation
Creators: name: Xie, Weiyu
name: Lu, Toh-Ming
name: Wang, Gwo-Ching
name: Bhat, Ishwara
name: Zhang, Shengbai
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Enhanced van der Waals (vdW) epitaxy of semiconductors on layered vdW substrate is identified as the formation of dative bonds. For example, despite that NbSe2 is a vdW layered material, first-principles calculations reveal that the bond strength at CdTe-NbSe2 interface is five times as large as that of vdW interaction at CdTe-graphene interface. The unconventional chemistry here is enabled by an effective net electron transfer from Cd dangling-bond states at CdTe surface to metallic non-bonding NbSe2 states, which is a necessary condition to activate the Cd for enhanced binding with Se.
SWAG Newsletter, Vol. 03, No. 05 (September, 1976)
Creators: name: Group, Victoria Status Of Women Action
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Sex discrimination against women
valueUri: http://id.worldcat.org/fast/1114376
subject: Women--Societies and clubs
valueUri: http://id.worldcat.org/fast/1176970
subject: Women
valueUri: http://id.worldcat.org/fast/1176568
subject: Women--Legal status, laws, etc.
valueUri: http://id.worldcat.org/fast/1176824
subject: Women--Economic conditions
valueUri: http://id.worldcat.org/fast/1176665
subject: Women's rights
valueUri: http://id.worldcat.org/fast/1178818
subject: Women--Employment--Law and legislation
valueUri: http://id.worldcat.org/fast/1176724
subject: Feminism
valueUri: http://id.worldcat.org/fast/922671
subject: Women--Social conditions
valueUri: http://id.worldcat.org/fast/1176947

description: The Victoria chapter of the Status of Women Action Group (SWAG) was formed in 1971 in response to the 1970 Report of the Royal Commission on the Status of Women. SWAG is a feminist organization that promotes economic, political and social equality and freedom for women. It is a non-profit society with several committees working on specific issues of concern to women. The group is an active member of the BC and Yukon Association of Women's Centres and the National Action Committee on the Status of Women.
Steroid regulation of gene expression in the mammary gland
Creators: name: Dench, Fiona.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Kinematics of the Central Stars Powering Bowshock Nebulae and the Large Multiplicity Fraction of Runaway OB Stars
Creators: name: Kobulnicky, Henry A.
name: Chick, William T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: OB stars powering stellar bowshock nebulae (SBNe) have been presumed to have large peculiar velocities. We measured peculiar velocities of SBN central stars to assess their kinematics relative to the general O star population using $Gaia$ EDR3 data for 267 SBN central stars and a sample of 455 Galactic O stars to derive projected velocities $v_{\rm 2D}$. For a subset of each sample we obtained new optical spectroscopy to measure radial velocities and identify multiple-star systems. We find a minimum multiplicity fraction of 36$\pm$6% among SBN central stars, consistent with $>$28% among runaway Galactic O stars. The large multiplicity fraction among runaways implicates very efficient dynamical ejection rather than binary-supernova origins. The median $v_{\rm 2D}$ of SBN central stars is $v_{\rm 2D}$=14.6 km s$^{-1}$, larger than the median $v_{\rm 2D}$=11.4 km s$^{-1}$ for non-bowshock O stars. Central stars of SBNe have a runaway ($v_{\rm 2D}$$>$25 km s$^{-1}$) fraction of 24$^{+9}_{-7}$%, consistent with the 22$^{+3}_{-3}$% for control-sample O stars. Most (76%) of SBNe central stars are not runaways. Our analysis of alignment ($Δ_{\rm PA}$) between the nebular morphological and $v_{\rm 2D}$ kinematic position angles reveals two populations: a highly aligned ($σ_{PA}$=25$^\circ$) population that includes stars with the largest $v_{\rm 2D}$ (31% of the sample) and a random (non-aligned) population (69% of the sample). SBNe that lie within or near HII regions comprise a larger fraction of this latter component than SBNe in isolated environments, implicating localized ISM flows as a factor shaping their orientations and morphologies. We outline a new conceptual approach to computing the Solar LSR motion, yielding [U$_\odot$, V$_\odot$, W$_\odot$]= [5.5, 7.5, 4.5] km s$^{-1}$.
description: Accepted for publication in AAS journals
An Application of ParaExp to Electromagnetic Wave Problems
Creators: name: Merkel, Melina
name: Niyonzima, Innocent
name: Schöps, Sebastian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.8, F.2.1, J.2
subject: 78A40, 74F15, 65M06, 65Y05

description: Recently, ParaExp was proposed for the time integration of hyperbolic problems. It splits the time interval of interest into sub-intervals and computes the solution on each sub-interval in parallel. The overall solution is decomposed into a particular solution defined on each sub-interval with zero initial conditions and a homogeneous solution propagated by the matrix exponential applied to the initial conditions. The efficiency of the method results from fast approximations of this matrix exponential using tools from linear algebra. This paper deals with the application of ParaExp to electromagnetic wave problems in time-domain. Numerical tests are carried out for an electric circuit and an electromagnetic wave problem discretized by the Finite Integration Technique.
Unbiased Optimal Stopping via the MUSE
Creators: name: Zhou, Zhengqing
name: Wang, Guanyang
name: Blanchet, Jose
name: Glynn, Peter W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation (stat.CO)
subject: Probability (math.PR)
subject: Computational Finance (q-fin.CP)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Economics and business
subject: 62C05, 60G40, 62L15

description: We propose a new unbiased estimator for estimating the utility of the optimal stopping problem. The MUSE, short for Multilevel Unbiased Stopping Estimator, constructs the unbiased Multilevel Monte Carlo (MLMC) estimator at every stage of the optimal stopping problem in a backward recursive way. In contrast to traditional sequential methods, the MUSE can be implemented in parallel. We prove the MUSE has finite variance, finite computational complexity, and achieves $ε$-accuracy with $O(1/ε^2)$ computational cost under mild conditions. We demonstrate MUSE empirically in an option pricing problem involving a high-dimensional input and the use of many parallel processors.
description: 39 pages, add several numerical experiments and technical results, accepted by Stochastic Processes and their Applications
Mo-Si-B alloys for ultra-high temperature space and ground applications: liquid assisted fabrication under various temperature and time conditions
Creators: name: Bruzda, G.
name: Polkowski, W.
name: Nowak, R.
name: Polkowska, A.
name: Lech, S.
name: Karczewski, K.
name: Książek, M.
name: Giuranno, D
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Boron-doped molybdenum silicides have been already recognized as attractive candidates for space and ground ultra-high temperature applications far beyond limits of state-of-the-art nickel based superalloys. In this work, we are exploring a new method for fabricating Mo-Si-B alloys (as coatings or small bulk components) by utilizing a pressure-less reactive melt infiltration approach. The basic assumption of this approach is a synthesis of binary and/or ternary and complex intermetallic phases (silicides, borides, borosilicides), through a direct interaction of Si-B melt with molybdenum . The main purpose of this work, was to examine the effect of temperature and time of Si-B melt interaction on the structure and morphology of the formed reaction products. For this purpose, sessile drop experiments were carried out on the eutectic Si-3.2B (wt%) alloy/Mo couples at temperature varying between 1385-1550°C and holding time between 10 to 30 minutes. The solidified sessile drop couples were subjected to microstructural characterization by means of light microscopy and scanning electron microscopy analyses performed both at "top-view" and cross-sectioned interfaces. The phases formed within the interaction zone were identified by using TEM/SAED and XRD techniques. It was documented that a thickness of both main product layer (MoSi2+Mo5Si3), as well as boron-rich interlayer increases with raising temperature and time of the Si-B melt interaction with Mo substrates.
Polynomial Structures in Generalized Geometry
Creators: name: Aldi, Marco
name: Grandini, Daniele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: On the generalized tangent bundle of a smooth manifold, we study skew-symmetric endomorphism satisfying an arbitrary polynomial equation with real constant coefficients. We study the compatibility of these structures with the de Rham operator and the Courant-Dorfman bracket. In particular we isolate several conditions that when restricted to the motivating example of generalized almost complex structure are equivalent to the notion of integrability.
description: 41 pages
Polarized heat current generated by quantum pumping in two-dimensional topological insulators
Creators: name: Ronetti, F.
name: Carrega, M.
name: Ferraro, D.
name: Rech, J.
name: Jonckheere, T.
name: Martin, T.
name: Sassetti, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider transport properties of a two dimensional topological insulator in a double quantum point contact geometry in presence of a time-dependent external field. In the proposed setup an external gate is placed above a single constriction and it couples only with electrons belonging to the top edge. This asymmetric configuration and the presence of an ac signal allow for a quantum pumping mechanism, which, in turn, can generate finite heat and charge currents in an unbiased device configuration. A microscopic model for the coupling with the external time-dependent gate potential is developed and the induced finite heat and charge currents are investigated. We demonstrate that in the non-interacting case, heat flow is associated with a single spin component, due to the helical nature of the edge states, and therefore a finite and polarized heat current is obtained in this configuration. The presence of e-e interchannel interactions strongly affects the current signal, lowering the degree of polarization of the system. Finally, we also show that separate heat and charge flows can be achieved, varying the amplitude of the external gate.
description: 13 pages, 5 figures
Astrophysical Searches and Constraints on Ultralight Bosonic Dark Matter
Creators: name: Marsh, David J. E.
name: Hoof, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Starting from the evidence that dark matter indeed exists and permeates the entire cosmos, various bounds on its properties can be estimated. Beginning with the cosmic microwave background and large scale structure, we summarize bounds on the ultralight bosonic dark matter (UBDM) mass and cosmic density. These bounds are extended to larger masses by considering galaxy formation and evolution, and the phenomenon of black hole superradiance. We then discuss the formation of different classes of UBDM compact objects including solitons/axion stars and miniclusters. Next, we consider astrophysical constraints on the couplings of UBDM to Standard Model particles, from stellar cooling (production of UBDM) and indirect searches (decays or conversion of UBDM). Throughout, there are short discussions of "hints and opportunities" in searching for UBDM in each area.
description: 46 pages, 8 figures. To appear as Chapter 3 in "The Search for Ultralight Bosonic Dark Matter," edited by Derek F. Jackson Kimball & Karl van Bibber (Springer, 2021). Solutions for the problems are included
Impact Craters and the Observability of Ancient Martian Shorelines
Creators: name: Baum, Mark
name: Sholes, Steven
name: Hwang, Andrew
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The existence of possible early oceans in the northern hemisphere of Mars has been researched and debated for decades. The nature of the early martian climate is still somewhat mysterious, but evidence for one or more early oceans implies long-lasting periods of habitability. The primary evidence supporting early oceans is a set of proposed remnant shorelines circling large fractions of the planet. The features are thought to be older than 3.6 Ga and possibly as old as 4 Ga, which would make them some of the oldest large-scale features still identifiable on the surface of Mars. One question that has not been thoroughly addressed, however, is whether shorelines this old could survive modification and destruction processes like impact craters, tectonics, volcanism, and hydrology in recognizable form. Here we address one of these processes -- impact cratering -- in detail. We use standard crater counting age models to generate synthetic, global populations of craters and intersect them with hypothetical shorelines, tracking portions of the shoreline that are directly impacted. The oldest shorelines (>= 4 Ga) are at least 70 % destroyed by direct impacts. Shorelines of any age >3.6 Ga are dissected into relatively short, discontinuous segments no larger than about 40 km when including the effects of craters larger than 100 m in radius. When craters smaller than 500 m in radius are excluded, surviving segment lengths can be as large as ~1000 km. The oldest shorelines exhibit fractal structure after impacts, presenting as a discontinuous collection of lines over a range of scales. If the features are truly shorelines, high-resolution studies should find similar levels of destruction and discontinuity. However, our results indicate that observing shorelines as old as 4 Ga, should they exist, is a significant challenge and raises questions about prior mapping efforts.
Involvement of sulfhydryl groups in 125I-insulin binding by a muscle insulin receptor
Creators: name: De Luca, Elisabetta.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Enthalpy-based modeling of tomographically reconstructed quiet-Sun coronal loops
Creators: name: Mac Cormack, C.
name: Fuentes, M. López
name: Mandrini, C. H.
name: Lloveras, D. G.
name: Vásquez, A. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The structure of the solar corona is made of magnetic flux tubes or loops. Due to the lack of contrast with their environment, observing and studying coronal loops in the quiet Sun is extremely difficult. In this work we use a differential emission measure tomographic (DEMT) technique to reconstruct, from a series of EUV images covering an entire solar rotation, the average 3D distribution of the thermal properties of the coronal plasma. By combining the DEMT products with extrapolations of the global coronal magnetic field, we reconstruct coronal loops and obtain the energy input required to keep them at the typical million-degree temperatures of the corona. We statistically study a large number of reconstructed loops for Carrington rotation (CR) 2082 obtaining a series of typical average loops of different lengths. We look for relations between the thermal properties and the lengths of the constructed typical loops and find similar results to those found in a previous work \citep{maccormack_2020}. We also analyze the typical loop properties by comparing them with the zero-dimensional (0D) hydrodynamic model Enthalpy-Based Thermal Evolution of Loops \citep[EBTEL, ][]{klimchuk_2008}. We explore two heating scenarios. In the first one, we apply a constant heating rate assuming that typical loops are in quasi-static equilibrium. In the second scenario we heat the plasma in the loops using short impulsive events. We find that the reconstructed typical loops are overdense with respect to quasi-static equilibrium solutions of the hydrodynamic model. Impulsive heating, on the other hand, reproduces better the observed densities and temperatures for the shorter and approximately semicircular loops.
The covariant electromagnetic Casimir effect for real conducting spherical shells
Creators: name: Razmi, H.
name: Abtahi, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Using the covariant electromagnetic Casimir effect (previously introduced for real conducting cylindrical shells [1]), the Casimir force experienced by a spherical shell, under Dirichlet boundary condition, is calculated. The renormalization procedure is based on the plasma cut-off frequency for real conductors. The real case of a gold (silver) sphere is considered and the corresponding electromagnetic Casimir force is computed. In the covariant approach, there isn't any decomposition of fields to TE and TM modes; thus, we do not need to consider the Neumann boundary condition in parallel to the Dirichlet problem and then add their corresponding results.
description: 12 pages, 1 table, There is an addendum,the Appendix, that has been added to what published in JMP. arXiv admin note: substantial text overlap with arXiv:1308.0007
Noise limits on two-photon interferometric sensing
Creators: name: Scott, Hannah
name: Branford, Dominic
name: Westerberg, Niclas
name: Leach, Jonathan
name: Gauger, Erik M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When a photon interferes with itself while traversing a Mach-Zehnder inteferometer, the output port where it emerges is influenced by the phase difference between the interferometer arms. This allows for highly precise estimation of the path length difference (delay) but is extremely sensitive to phase noise. By contrast, a delay between the arms of the two-photon Hong-Ou-Mandel interferometer directly affects the relative indistinguishability of the photon pair, affecting the rate of recorded coincidences. This likewise allows for delay estimation; notably less precise but with the advantage of being less sensitive to perturbations of the photons' phase. Focusing on two-photon input states, we here investigate to what degree of noise Mach-Zehnder interferometry retains its edge over Hong-Ou-Mandel interferometry. We also explore the competing benefits of different two-photon inputs for a Mach-Zehnder interferometer, and under what parameter regimes each input performs best.
description: 19 pages, 10 figures
Diatom Algae as a limnological factor
Creators: name: Ussenaliyeva, Aizhan
Publisher: name: figshare
Year: 2023
Subjects: Freshwater ecology
Groundwater hydrology
Water treatment processes
Surface water hydrology
Pacific Peoples land and water management
Water resources engineering
Crop and pasture waste water use
Groundwater quality processes and contaminated land assessment

description: Research finding - Save Lake Balkhash International Research
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIII. Proper-motion catalogs and internal kinematics
Creators: name: Libralato, M.
name: Bellini, A.
name: Vesperini, E.
name: Piotto, G.
name: Milone, A. P.
name: van der Marel, R. P.
name: Anderson, J.
name: Aparicio, A.
name: Barbuy, B.
name: Bedin, L. R.
name: Borsato, L.
name: Cassisi, S.
name: Dalessandro, E.
name: Ferraro, F. R.
name: King, I. R.
name: Lanzoni, B.
name: Nardiello, D.
name: Ortolani, S.
name: Sarajedini, A.
name: Sohn, S. T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A number of studies based on data collected by the $\textit{Hubble Space Telescope}$ ($\textit{HST}$) GO-13297 program "HST Legacy Survey of Galactic Globular Clusters: Shedding UV Light on Their Populations and Formation" have investigated the photometric properties of a large sample of Galactic globular clusters and revolutionized our understanding of their stellar populations. In this paper, we expand previous studies by focusing our attention on the stellar clusters' internal kinematics. We computed proper motions for stars in 56 globular and one open clusters by combining the GO-13297 images with archival $\textit{HST}$ data. The astro-photometric catalogs released with this paper represent the most complete and homogeneous collection of proper motions of stars in the cores of stellar clusters to date, and expand the information provided by the current (and future) $\textit{Gaia}$ data releases to much fainter stars and into the crowded central regions. We also census the general kinematic properties of stellar clusters by computing the velocity-dispersion and anisotropy radial profiles of their bright members. We study the dependence on concentration and relaxation time, and derive dynamical distances. Finally, we present an in-depth kinematic analysis of the globular cluster NGC 5904.
description: 33 pages, 19 figures, 6 tables. Accepted for publication on ApJ. Astro-photometric catalogs, velocity-dispersion values and profiles are available at https://archive.stsci.edu/hlsp/hacks
Describing Humanitarian Logistics in Disaster Response: The Case of Jesuit Refuge Service, In Ethiopia
Creators: name: Girma, Abju
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: The purpose of this research was to evaluate the efficiency and effectiveness of humanitarian disaster response operation with respect to service provision and response rate of the organization in discussion, which is Jesuit Refugee service (JRS). The researcher has used cense data collection and descriptive data analysis methods respectively for the study. The major finding of the research was that JRS have problems of delivering services efficiently, does not have established means of combating the problem at hand, does not have plan to address disasters rather focus on programs, decision making depends on donors, does not integrate the four disaster relief operations elements and finally does not have sufficient infrastructure. The significance of the study is to add to the existing academic writings on the subject in addition it will also highlight the current situation of disaster relief logistics in humanitarian organization in relation to refugee camps and their performance as well as aid anyone who wants to conduct further study on the subject.
Analytic Materials
Creators: name: Milton, Graeme W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The theory of inhomogeneous analytic materials is developed. These are materials where the coefficients entering the equations involve analytic functions. Three types of analytic materials are identified. The first two types involve an integer $p$. If $p$ takes its maximum value then we have a complete analytic material. Otherwise it is incomplete analytic material of rank $p$. For two-dimensional materials further progress can be made in the identification of analytic materials by using the well-known fact that a $90^\circ$ rotation applied to a divergence free field in a simply connected domain yields a curl-free field, and this can then be expressed as the gradient of a potential. Other exact results for the fields in inhomogeneous media are reviewed. Also reviewed is the subject of metamaterials, as these materials provide a way of realizing desirable coefficients in the equations.
description: 28 pages, 1 figure