cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
[Rezension von: Modrow, Irina, Dienstgemeine des Herrn, Nikolaus Ludwig von Zinzendorf u]
Creators: name: Temme, Willi
name: Modrow, Irina
Publisher: name: Unitas Fratrum
Year: 1970

description: Unitas Fratrum, Bd. 37 (1995): Unitas Fratrum, Band 37
Adaptive Step Size Learning with Applications to Velocity Aided Inertial Navigation System
Creators: name: Or, Barak
name: Klein, Itzik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Autonomous underwater vehicles (AUV) are commonly used in many underwater applications. Recently, the usage of multi-rotor unmanned autonomous vehicles (UAV) for marine applications is receiving more attention in the literature. Usually, both platforms employ an inertial navigation system (INS), and aiding sensors for an accurate navigation solution. In AUV navigation, Doppler velocity log (DVL) is mainly used to aid the INS, while for UAVs, it is common to use global navigation satellite systems (GNSS) receivers. The fusion between the aiding sensor and the INS requires a definition of step size parameter in the estimation process. It is responsible for the solution frequency update and, eventually, its accuracy. The choice of the step size poses a tradeoff between computational load and navigation performance. Generally, the aiding sensors update frequency is considered much slower compared to the INS operating frequency (hundreds Hertz). Such high rate is unnecessary for most platforms, specifically for low dynamics AUVs. In this work, a supervised machine learning based adaptive tuning scheme to select the proper INS step size is proposed. To that end, a velocity error bound is defined, allowing the INS/DVL or the INS/GNSS to act in a sub-optimal working conditions, and yet minimize the computational load. Results from simulations and field experiment show the benefits of using the proposed approach. In addition, the proposed framework can be applied to any other fusion scenarios between any type of sensors or platforms.
On the causality aspects of the dynamical Chern-Simons modified gravity
Creators: name: Porfirio, P. J.
name: Fonseca-Neto, J. B.
name: Nascimento, J. R.
name: Petrov, A. Yu.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the Gödel-type solutions within the dynamical Chern-Simons modified gravity in four dimensions. Within our study, we show that in the vacuum case the causal solutions are possible which cannot take place within the non-dynamical framework. Another our result consists in the possibility for completely causal solutions for all types of matters we study in the paper, that is, relativistic fluid, cosmological constant, scalar and electromagnetic fields.
description: 15 pages
Structured electrode additive manufacturing for lithium-ion batteries
Creators: name: Park, Soyeon
name: Deng, Kaiyue
name: Shi, Baohui
name: Shang, Yuanyuan
name: Kun
name: Fu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A thick electrode with high areal capacity has been developed as a strategy for high-energy-density lithium-ion batteries, but thick electrodes have difficulties in manufacturing and limitations in ion transport. Here, we reported a new manufacturing approach for ultra-thick electrode with aligned structure, called structure electrode additive manufacturing or SEAM, which aligns active materials to the through-thicknesses direction of electrodes using shear flow and a designed printing path. The ultra-thick electrodes with high loading of active materials, low tortuous structure, and good structure stability resulting from a simple and scalable SEAM lead to rapid ion transport and fast electrolyte infusion, delivering a higher areal capacity than slurry-casted thick electrodes. SEAM shows strengths in design flexibility and scalability, which allows the production of practical high energy/power density structure electrodes.
[Rezension von: Gerland, Manfred, Wesentliche Vereinigung, Unters. zum Abendmahlverständnis Zinzendorfs]
Creators: name: Meyer, Dietrich
name: Gerland, Manfred
Publisher: name: Unitas Fratrum
Year: 1970

description: Unitas Fratrum, Bd. 37 (1995): Unitas Fratrum, Band 37
Thermodynamics of Giant Planet Formation: Shocking Hot Surfaces on Circumplanetary Disks
Creators: name: Szulágyi, J.
name: Mordasini, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The luminosity of young giant planets can inform about their formation and accretion history. The directly imaged planets detected so far are consistent with the "hot-start" scenario of high entropy and luminosity. If nebular gas passes through a shock front before being accreted into a protoplanet, the entropy can be substantially altered. To investigate this, we present high resolution, 3D radiative hydrodynamic simulations of accreting giant planets. The accreted gas is found to fall with supersonic speed in the gap from the circumstellar disk's upper layers onto the surface of the circumplanetary disk and polar region of the protoplanet. There it shocks, creating an extended hot supercritical shock surface. This shock front is optically thick, therefore, it can conceal the planet's intrinsic luminosity beneath. The gas in the vertical influx has high entropy which when passing through the shock front decreases significantly while the gas becomes part of the disk and protoplanet. This shows that circumplanetary disks play a key role in regulating a planet's thermodynamic state. Our simulations furthermore indicate that around the shock surface extended regions of atomic - sometimes ionized - hydrogen develop. Therefore circumplanetary disk shock surfaces could influence significantly the observational appearance of forming gas-giants.
description: 5 pages, 3 figures, 1 table, accepted for publication at MNRAS Letters
Renewal of the gage-block interferometer at INRIM
Creators: name: Bellotti, Roberto
name: Franco, Mauro
name: Picotto, Gian Bartolo
name: Pometto, Marco
Publisher: name: Physikalisch-Technische Bundesanstalt (PTB)
Year: 2015
Subjects: subject: gage block
subject: interferometry
subject: excess fractions
subject: fringe analysis
subject: metrology
subject: INRIM
subject: 120.3940
subject: 120.3180

description: This article is based on a presentation at the conference "MacroScale 2014 - Recent developments in traceable dimensional measurements", Vienna (Austria), 28th-30th October 2014.
description: The Hilger and Watts interferometer in use at INRIM for the calibration of gage blocks up to 100 mm has been recently upgraded with stabilized He-Ne laser sources providing traceable wavelengths at 633 nm, 543 nm and 594 nm. The new set-up has been validated by an internal comparison with reference gage blocks in use for the periodical verification of the overall measuring system. The fringe order ambiguity determined with the exact fractions method by using the two wavelengths at 633 nm and 543 nm has been tested and compared with that obtained by using all the three wavelengths.
Semi-analytic forecasts for JWST -- VI. Simulated lightcones and galaxy clustering predictions
Creators: name: Yung, L. Y. Aaron
name: Somerville, Rachel S.
name: Ferguson, Henry C.
name: Finkelstein, Steven L.
name: Gardner, Jonathan P.
name: Davé, Romeel
name: Bagley, Micaela B.
name: Popping, Gergö
name: Behroozi, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In anticipation of the new era of high-redshift exploration marked by the commissioning of the James Webb Space Telescope (JWST), we present two sets of galaxy catalogues that are designed to aid the planning and interpretation of observing programs. We provide a set of 40 wide-field lightcones with footprints spanning approximately ~ 1,000 sq. arcmin, containing galaxies up to z = 10, and a new set of 8 ultra-deep lightcones with 132 sq. arcmin footprints, containing galaxies up to z ~ 12 down to the magnitudes expected to be reached in the deepest JWST surveys. These mock lightcones are extracted from dissipationless N-body simulations and populated with galaxies using the well-established, computationally efficient Santa Cruz semi-analytic model for galaxy formation. We provide a wide range of predicted physical properties, and simulated photometry from NIRCam and many other instruments. We explore the predicted counts and luminosity functions and angular two-point correlation functions for galaxies in these simulated lightcones. We also explore the predicted field-to-field variance using multiple lightcone realizations. We find that these lightcones reproduce the available measurements of observed clustering from 0.2 < z < 7.5 very well. We provide predictions for galaxy clustering at high redshift that may be obtained from future JWST observations. All of the lightcones presented here are made available through a web-based, interactive data release portal https://flathub.flatironinstitute.org/group/sam-forecasts.
description: Final paper of the Semi-analytic forecasts for JWST series. 24 pages, 14 figures, many years of exciting science to come, accepted for publication in MNRAS
Towards a variational Jordan-Lee-Preskill quantum algorithm
Creators: name: Liu, Junyu
name: Li, Zimu
name: Zheng, Han
name: Yuan, Xiao
name: Sun, Jinzhao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Rapid developments of quantum information technology show promising opportunities for simulating quantum field theory in near-term quantum devices. In this work, we formulate the theory of (time-dependent) variational quantum simulation of the 1+1 dimensional $λϕ^4$ quantum field theory including encoding, state preparation, and time evolution, with several numerical simulation results. These algorithms could be understood as near-term variational quantum circuit (quantum neural network) analogs of the Jordan-Lee-Preskill algorithm, the basic algorithm for simulating quantum field theory using universal quantum devices. Besides, we highlight the advantages of encoding with harmonic oscillator basis based on the LSZ reduction formula and several computational efficiency such as when implementing a bosonic version of the unitary coupled cluster ansatz to prepare initial states. We also discuss how to circumvent the "spectral crowding" problem in the quantum field theory simulation and appraise our algorithm by both state and subspace fidelities.
description: v2: modified style, add references, clear typos. v3; v4: significant change, authors added
Bilinear models in time series
Creators: name: Nirmalan, Thurairajani.
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.
Pressure and temperature driven phase transitions in HgTe quantum wells
Creators: name: Krishtopenko, S. S.
name: Yahniuk, I.
name: But, D. B.
name: Gavrilenko, V. I.
name: Knap, W.
name: Teppe, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present theoretical investigations of pressure and temperature driven phase transitions in HgTe quantum wells grown on CdTe buffer. Using the 8-band \textbf{k$\cdot$p} Hamiltonian we calculate evolution of energy band structure at different quantum well width with hydrostatic pressure up to 20 kBar and temperature ranging up 300 K. In particular, we show that in addition to temperature, tuning of hydrostatic pressure allows to drive transitions between semimetal, band insulator and topological insulator phases. Our realistic band structure calculations reveal that the band inversion under hydrostatic pressure and temperature may be accompanied by non-local overlapping between conduction and valence bands. The pressure and temperature phase diagrams are presented.
description: 9 pages, 8 figures + Supplemental material (5 pages)
Topological gauge theory for mixed Dirac stationary states in all dimensions
Creators: name: Huang, Ze-Min
name: Sun, Xiao-Qi
name: Diehl, Sebastian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive the universal real time $U(1)$ topological gauge field action for mixed quantum states of weakly correlated fermions in all dimensions, and demonstrate its independence of the underlying equilibrium or non-equilibrium nature of dynamics stabilizing the state. The key prerequisites are charge quantization and charge conservation. The gauge action encodes non-quantized linear responses as expected for mixed states, but also quantized non-linear responses, associated to mixed state topology and accessible in experiment. Our construction furthermore demonstrates how the physical pictures of anomaly inflow and bulk-boundary correspondence extend to non-equilibrium systems.
description: 6+16 pages, 1 figure
India's first robotic eye for time domain astrophysics: the GROWTH-India telescope
Creators: name: Kumar, Harsh
name: Bhalerao, Varun
name: Anupama, G. C.
name: Barway, Sudhanshu
name: Basu, Judhajeet
name: Deshmukh, Kunal
name: De, Kishalay
name: Dutta, Anirban
name: Fremling, Christoffer
name: Iyer, Hrishikesh
name: Jassani, Adeem
name: Joharle, Simran
name: Karambelkar, Viraj
name: Khandagale, Maitreya
name: Krishna, K Adithya
name: Kulkarni, Sumeet
name: Mate, Sujay
name: Patil, Atharva
name: Phanindra, DVS
name: Samantaray, Subham
name: Sharma, Kritti
name: Sharma, Yashvi
name: Shenoy, Vedant
name: Singh, Avinash
name: Srivastava, Shubham
name: Swain, Vishwajeet
name: Waratkar, Gaurav
name: Angchuk, Dorje
name: Dorjay, Padma
name: Dorjai, Tsewang
name: Gyalson, Tsewang
name: Jorphail, Sonam
name: Mahay, Tashi Thsering
name: Norbu, Rigzin
name: Sharma, Tarun Kumar
name: Stanzin, Jigmet
name: Stanzin, Tsewang
name: Stanzin, Urgain
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the design and performance of the GROWTH-India telescope, a 0.7 m robotic telescope dedicated to time-domain astronomy. The telescope is equipped with a 4k back-illuminated camera giving a 0.82-degree field of view and sensitivity of m_g ~20.5 in 5-min exposures. Custom software handles observatory operations: attaining high on-sky observing efficiencies (>~ 80%) and allowing rapid response to targets of opportunity. The data processing pipelines are capable of performing PSF photometry as well as image subtraction for transient searches. We also present an overview of the GROWTH-India telescope's contributions to the studies of Gamma-ray Bursts, the electromagnetic counterparts to gravitational wave sources, supernovae, novae and solar system objects.
description: 17 pages, 8 figures, Accepted for publication in The Astronomical Journal
Common envelope ejection in massive binary stars - Implications for the progenitors of GW150914 and GW151226
Creators: name: Kruckow, M. U.
name: Tauris, T. M.
name: Langer, N.
name: Szecsi, D.
name: Marchant, P.
name: Podsiadlowski, Ph.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The recently detected gravitational wave signals (GW150914 and GW151226) of the merger event of a pair of relatively massive stellar-mass black holes (BHs) calls for an investigation of the formation of such progenitor systems in general. We analyse the common envelope (CE) stage of the "traditional" formation channel in binaries where the first-formed compact object undergoes an in-spiral inside the envelope of its evolved companion star and ejects the envelope in that process. We calculate envelope binding energies of donor stars with initial masses between 4 and 115 Msun for metallicities of Z=Zsun/2 and Z=Zsun/50, and derive minimum masses of in-spiralling objects needed to eject these envelopes. We find that CE evolution, besides from producing WD-WD and NS-NS binaries, may, in principle, also produce massive BH-BH systems with individual BH component masses up to ~50-60 Msun, in particular for donor stars evolved to giants. However, the physics of envelope ejection of massive stars remains uncertain. We discuss the applicability of the energy-budget formalism, the location of the bifurcation point, the recombination energy and the accretion energy during in-spiral as possible energy sources, and also comment on the effect of inflated helium cores. Massive stars in a wide range of metallicities and with initial masses up to at least 115 Msun may possibly shed their envelopes and survive CE evolution, depending on their initial orbital parameters, similarly to the situation for intermediate mass and low-mass stars with degenerate cores. We conclude that based on stellar structure calculations, and in the view of the usual simple energy budget analysis, events like GW150914 and GW151226 could possibly be produced from the CE channel. Calculations of post-CE orbital separations, however, and thus the estimated LIGO detection rates, remain highly uncertain. [Abridged]
description: 13 pages, 7 figures, A&A accepted
Resolution Study of Thermonuclear Initiation in White Dwarf Tidal Disruption Events
Creators: name: Anninos, Peter
name: Camarda, Karen D.
name: Estes-Myers, Brooke
name: Roth, Nathaniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the initiation of thermonuclear detonations in tidally disrupted white dwarf stars by intermediate-mass ($10^3 M_\odot$) black holes. The length scales required to resolve the initiation mechanism are not easily reached in three-dimensions, so instead we have devised two-dimensional proxy models which, together with a logarithmic gridding strategy, can adequately capture detonation wave fronts as material undergoes simultaneous compression and stretching from tidal forces. We consider 0.15 and 0.6 solar mass white dwarf stars parameterized by tidal strengths in the range $β=4~\text{to}~23$. High spatial resolution elucidates the manner and conditions leading to thermonuclear detonation, linking the initiation sequence to stellar composition and tidal strength. All of our models suffer sustained detonations triggered by a combination of adiabatic compression, mild thermonuclear preconditioning, and collisional heating, in degrees depending primarily on tidal strength. We find many diagnostics, such as temperature, total released energy, and iron group products, are fairly well-converged (better than 10%) at resolutions below 10 km along the scale height of the orbital plane. The exceptions are intermediate mass transients like calcium, which remain uncertain up to factors of two even at 1 km resolution.
description: Accepted to ApJ. 18 pages, 11 figures
Inpainting hydrodynamical maps with deep learning
Creators: name: Mohammad, Faizan G.
name: Villaescusa-Navarro, Francisco
name: Genel, Shy
name: Angles-Alcazar, Daniel
name: Vogelsberger, Mark
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: From 1,000 hydrodynamic simulations of the CAMELS project, each with a different value of the cosmological and astrophysical parameters, we generate 15,000 gas temperature maps. We use a state-of-the-art deep convolutional neural network to recover missing data from those maps. We mimic the missing data by applying regular and irregular binary masks that cover either $15\%$ or $30\%$ of the area of each map. We quantify the reliability of our results using two summary statistics: 1) the distance between the probability density functions (pdf), estimated using the Kolmogorov-Smirnov (KS) test, and 2) the 2D power spectrum. We find an excellent agreement between the model prediction and the unmasked maps when using the power spectrum: better than $1\%$ for $k<20 h/$Mpc for any irregular mask. For regular masks, we observe a systematic offset of $\sim5\%$ when covering $15\%$ of the maps while the results become unreliable when $30\%$ of the data is missing. The observed KS-test p-values favor the null hypothesis that the reconstructed and the ground-truth maps are drawn from the same underlying distribution when irregular masks are used. For regular-shaped masks on the other hand, we find a strong evidence that the two distributions do not match each other. Finally, we use the model, trained on gas temperature maps, to perform inpainting on maps from completely different fields such as gas mass, gas pressure, and electron density and also for gas temperature maps from simulations run with other codes. We find that visually, our model is able to reconstruct the missing pixels from the maps of those fields with great accuracy, although its performance using summary statistics depends strongly on the considered field.
description: 14 pages, 6 figures, Submitted to APJ
Oxygen vacancy-induced anomalous Hall effect in a nominally non-magnetic oxide
Creators: name: Al-Tawhid, Athby H.
name: Kanter, Jesse
name: Hatefipour, Mehdi
name: Irving, Douglas L.
name: Kumah, Divine P.
name: Shabani, Javad
name: Ahadi, Kaveh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The anomalous Hall effect, a hallmark of broken time-reversal symmetry and spin-orbit coupling, is frequently observed in magnetically polarized systems. Its realization in non-magnetic systems, however, remains elusive. Here, we report on the observation of anomalous Hall effect in nominally non-magnetic KTaO3. Anomalous Hall effect emerges in reduced KTaO3 and shows an extrinsic to intrinsic crossover. A paramagnetic behavior is observed in reduced samples using first principles calculations and quantitative magnetometry. The observed anomalous Hall effect follows the oxygen vacancy-induced magnetization response, suggesting that the localized magnetic moments of the oxygen vacancies scatter conduction electrons asymmetrically and give rise to anomalous Hall effect. The anomalous Hall conductivity becomes insensitive to scattering rate in the low temperature limit (T<5 K), implying that the Berry curvature of the electrons on the Fermi surface controls the anomalous Hall effect. Our observations describe a detailed picture of many-body interactions, triggering anomalous Hall effect in a non-magnetic system.
Reactivity of ([eta]5-C5H5) 2Rh2 ([mu]-CO) (CF3C2CF3) towards isocyanides and metal complexes
Creators: name: Pateras, Helen.
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.
REPORT SUMMARISING THE LITERATURE REVIEW for Selection of Representative Syngas Compositions including Organic and Inorganic Contaminants
Creators: name: J.P. Ouweltjes
Publisher: name: Zenodo
Year: 2019

description: Within the BLAZE project, an SOFC from SOLIDpower will be integrated with a bubbled fluidised bed steam gasifier developed by UNIVAQ, USGM and WALTER TOSTO. This report has been made in order to understand if there are potential risks if the producer gas is fed to the SOFC. After an introduction in chapter 2, the current level of understanding what will be the gas quality, considering both relatively clean biomass feedstock (e.g. almond shells) and relatively dirty biodegradable waste (e.g. municipal solid waste) are considered and will be given in chapter 3. Then, chapter 4 summarises in a broad sense what is known about the operation of SOFCs with carbonaceous gases as well as the impact of contaminants that might exist in bio-syngas arriving from a BFB steam gasifier. Chapter 5 concludes with giving recommendations about the experiments that need to be carried out in work package 3 in order to successfully demonstrate the integrated system in WP 6. This deliverable is related to milestone MS3 “Selection of the test conditions for the experimental work” The indicators of success are the identification of at least 5 experimental and 5 simulative international peer reviewed papers on gasifiers/hot gas conditioning systems in order to select at least 2 representative compositions and 2 organic and 3 inorganic representative contaminants levels. This report identified 83 papers (mostly experimental) instead of 10, and 1 representative composition (owing to the decision to focus only on the steam gasification tested at pilot scale) and 2 organic (toluene and naphthalene) and 3 inorganic (H2S, KCl; HCl) representative contaminants levels.
LAMOST Spectrograph Response Curves: Stability and Application to flux calibration
Creators: name: Du, Bing
name: Luo, A-Li
name: Bai, Zhong-Rui
name: Kong, Xiao
name: Zhang, Jian-Nan
name: Guo, Yan-Xin
name: Cook, Neil James
name: Hou, Wen
name: Yang, Hai-Feng
name: Li, Yin-Bi
name: Song, Yi-Han
name: Chen, Jian-Jun
name: Zuo, Fang
name: Wu, Ke-Fei
name: Wang, Meng-Xin
name: Wang, You-Fen
name: Zhao, Yong-Heng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The task of flux calibration for LAMOST (Large sky Area Multi-Object Spectroscopic Telescope) spectra is difficult due to many factors. For example, the lack of standard stars, flat fielding for large field of view, and variation of reddening between different stars especially at low galactic latitudes etc. Poor selection, bad spectral quality, or extinction uncertainty of standard stars not only might induce errors to the calculated spectral response curve (SRC), but also might lead to failures in producing final 1D spectra. In this paper, we inspected spectra with Galactic latitude |b|>=60 degree and reliable stellar parameters, determined through the LAMOST Stellar Parameter Pipeline (LASP), to study the stability of the spectrograph. To guarantee the selected stars had been observed by each fiber, we selected 37,931 high quality exposures of 29,000 stars from LAMOST DR2, and more than 7 exposures for each fiber. We calculated the SRCs for each fiber for each exposure, and calculated the statistics of SRCs for spectrographs with both the fiber variations and time variations. The result shows that the average response curve of each spectrograph (henceforth ASPSRC) is relatively stable with statistical errors <= 10%. From the comparison between each ASPSRC and the SRCs for the same spectrograph obtained by 2D pipeline, we find that the ASPSRCs are good enough to use for the calibration. The ASPSRCs have been applied to spectra which were abandoned by LAMOST 2D pipeline due to the lack of standard stars, increasing the number of LAMOST spectra by 52,181 in DR2. Comparing those same targets with SDSS, the relative flux differences between SDSS spectra and that of LAMOST spectra with the ASPSRC method are less than 10%, which underlines that the ASPSRC method is feasible for LAMOST flux calibration.
description: 23 pages,22 figures, accepted by ApJS
The Open Cluster Chemical Abundances and Mapping Survey: VI. Galactic Chemical Gradient Analysis from APOGEE DR17
Creators: name: Myers, Natalie
name: Donor, John
name: Spoo, Taylor
name: Frinchaboy, Peter M.
name: Cunha, Katia
name: Price-Whelan, Adrian M.
name: Majewski, Steven R.
name: Beaton, Rachael L.
name: Zasowski, Gail
name: O'Connell, Julia
name: Ray, Amy E.
name: Bizyaev, Dmitry
name: Chiappini, Cristina
name: García-Hernández, D. A.
name: Geisler, Doug
name: Jönsson, Henrik
name: Lane, Richard R.
name: Longa-Peña, Penélope
name: Minchev, Ivan
name: Minniti, Dante
name: Nitschelm, Christian
name: Roman-Lopes, A.
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: The goal of the Open Cluster Chemical Abundances and Mapping (OCCAM) survey is to constrain key Galactic dynamic and chemical evolution parameters by the construction and analysis of a large, comprehensive, uniform data set of infrared spectra for stars in hundreds of open clusters. This sixth contribution from the OCCAM survey presents analysis of SDSS/APOGEE Data Release 17 (DR17) results for a sample of stars in 150 open clusters, 94 of which we designate to be "high quality'' based on the appearance of their color-magnitude diagram. We find the APOGEE DR17-derived [Fe/H] values to be in good agreement with those from previous high resolution spectroscopic open cluster abundance studies. Using a subset of the high quality sample, the Galactic abundance gradients were measured for 16 chemical elements, including [Fe/H], for both Galactocentric radius ($R_{GC}$) and guiding center radius ($R_{Guide}$). We find an overall Galactic [Fe/H] vs $R_{GC}$ gradient of $-0.073 \pm 0.002$ dex/kpc over the range of $6 < R_{GC} < 11.5$ kpc, and a similar gradient is found for [Fe/H] versus $R_{Guide}$. Significant Galactic abundance gradients are also noted for O, Mg, S, Ca, Mn, Na, Al, K and Ce. Our large sample additionally allows us to explore the evolution of the gradients in four age bins for the remaining 15 elements.
description: 21 pages, 14 Figures, Astronomical Journal Accepted
Nonlinear conditions for ultradifferentiability: a uniform approach
Creators: name: Nenning, David Nicolas
name: Rainer, Armin
name: Schindl, Gerhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: Differential Geometry (math.DG)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Recent work showed that a theorem of Joris (that a function $f$ is smooth if two coprime powers of $f$ are smooth) is valid in a wide variety of ultradifferentiable classes $\mathcal C$. The core of the proof was essentially $1$-dimensional. In certain cases a multidimensional version resulted from subtle reduction arguments, but general validity, notably in the quasianalytic setting, remained open. In this paper we give a uniform proof which works in all cases and dimensions. It yields the result even on infinite dimensional Banach spaces and convenient vector spaces. We also consider more general nonlinear conditions, namely general analytic germs $Φ$ instead of the powers, and characterize when $Φ\circ f \in \mathcal C$ implies $f \in \mathcal C$.
description: 15 pages, Remark 4.3 expanded, accepted for publication in J. Geom. Anal.,
Coexistence of superconductivity and weak anti-localization at KTaO3 (111) interfaces
Creators: name: Al-Tawhid, Athby H.
name: Kanter, Jesse
name: Hatefipour, Mehdi
name: Kumah, Divine P.
name: Shabani, Javad
name: Ahadi, Kaveh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The intersection of two-dimensional superconductivity and topologically nontrivial states hosts a wide range of quantum phenomena, including Majorana fermions. Coexistence of topologically nontrivial states and superconductivity in a single material, however, remains elusive. Here, we report on the observation of two-dimensional superconductivity and weak anti-localization at the TiOx/KTaO3(111) interfaces. A remnant, saturating resistance persists below the transition temperature as superconducting puddles fail to reach phase coherence. Signatures of weak anti-localization are observed below the superconducting transition, suggesting the coexistence of superconductivity and weak anti-localization. The superconducting interfaces show roughly one order of magnitude larger weak anti-localization correction, compared to non-superconducting interfaces, alluding to a relatively large coherence length in these interfaces.
The five dimensional transformed Weyl$-$Yang$-$Kaluza$-$Klein theory of gravity
Creators: name: Kuyrukcu, Halil
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the case in which the five dimensional theory is the transformed Weyl$-$Yang$-$Kaluza$-$Klein gravity. The dimensionally reduced equations of motion are derived by considering an alternative form of the main equation of the theory in the coordinate basis. The conformal transformation rules are applied to the invariants. We also discuss the possible specific cases and the new Lorentz force density term, in detail.
description: Minor updates to accord with the published version in Karaelmas Science and Engineering Journal. For original article, please follow the link: https://dergipark.org.tr/tr/pub/karaelmasfen/issue/74140/1009039
A quantum thin shell surrounding a Black Hole
Creators: name: Vaz, Cenalo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a previous work we obtained exact solutions for the proper time quantum mechanics of a thin dust shell, collapsing in a vacuum. We extend these results to the quantum collapse of a dust shell surrounding a pre-existing black hole. In lieu of exact solutions, which have so far proved difficult to obtain for this system, we establish the essential features of the quantum shell through a Wentzel-Kramers-Brillouin (WKB) approximation, which is valid only when the mass of the shell is much greater than the Planck mass. There are many similarities with the vacuum collapse: only bound states exist and the proper energy spectrum of the shell is unaffected by the presence of the central black hole to this order. There are no peculiar or distinguishing features of the wave function near the black hole horizon. It vanishes at the center and oscillates between the origin and the classically forbidden region, beyond which it decays exponentially.
description: 12 pages, no figures
Collective ferromagnetism of artificial square spin ice
Creators: name: Bingham, N. S.
name: Zhang, X.
name: Ramberger, J.
name: Heinonen, O.
name: Leighton, C.
name: Schiffer, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied the temperature and magnetic field dependence of the total magnetic moment of large-area permalloy artificial square spin ice arrays. The temperature dependence and hysteresis behavior are consistent with the coherent magnetization reversal expected in the Stoner-Wohlfarth model, with clear deviations due to inter-island interactions at small lattice spacing. Through micromagnetic simulations, we explore this behavior and demonstrate that the deviations result from increasingly complex magnetization reversal at small lattice spacing, induced by inter-island interactions, and depending critically on details of the island shapes. These results establish new means to tune the physical properties of artificial spin ice structures and other interacting nanomagnet systems, such as patterned magnetic media.
description: 17 pages, 5 figures
Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
Creators: name: Fuerst, F.
name: Walton, D. J.
name: Harrison, F. A.
name: Stern, D.
name: Barret, D.
name: Brightman, M.
name: Fabian, A. C.
name: Grefenstette, B.
name: Madsen, K. K.
name: Middleton, M. J.
name: Miller, J. M.
name: Pottschmidt, K.
name: Ptak, A.
name: Rana, V.
name: Webb, N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the detection of coherent pulsations from the ultraluminous X-ray source NGC 7793 P13. The ~0.42s nearly sinusoidal pulsations were initially discovered in broadband X-ray observations using XMM-Newton and NuSTAR taken in 2016. We subsequently also found pulsations in archival XMM-Newton data taken in 2013 and 2014. The significant (>>5 sigma) detection of coherent pulsations demonstrates that the compact object in P13 is a neutron star with an observed peak luminosity of ~1e40 erg/s (assuming isotropy), well above the Eddington limit for a 1.4 M_sun accretor. This makes P13 the second ultraluminous X-ray source known to be powered by an accreting neutron star. The pulse period varies between epochs, with a slow but persistent spin up over the 2013-2016 period. This spin-up indicates a magnetic field of B ~ 1.5e12 G, typical of many accreting pulsars. The most likely explanation for the extreme luminosity is a high degree of beaming, however this is difficult to reconcile with the sinusoidal pulse profile.
description: 6 pages, 3 figures, accepted for publication in ApJL
Reconsideration of the inclusive prompt photon production at LHC with kt-factorization
Creators: name: Lipatov, A. V.
name: Malyshev, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reconsider the inclusive production of isolated prompt photons in $pp$ collisions at the LHC energies in the framework of $k_T$-factorization approach. Our analysis is based on the ${\cal O}(αα_s)$ off-shell (depending on the transverse momenta of initial quarks and gluons) production amplitudes of $q^* g^* \to γq$ and $q^* \bar q^* \to γg$ partonic subprocesses and transverse momentum dependent (or unintegrated) quark and gluon densities in a proton, which are chosen in accordance with the Kimber-Martin-Ryskin prescription. We show that the sub-leading high-order ${\cal O}(αα_s^2)$ contributions, not covered by the non-collinear evolution of parton densities, are important to describe latest LHC data.
description: 13 pages, 7 figures
Variaţia anuală a numărului de cercetători la 1000 de persoane ocupate, pe ţări
Creators: name: Corlan, Alexandru Dan
Publisher: name: Zenodo
Year: 2020

description: Predictia prin extrapolare liniara a numarului de cercetatori la 1000 de persoane ocupate in Romania fata de UE28 si de alte tari din setul de date OECD.
The yeast mitochondrial H+-ATPase : function and assembly defects in mutants with altered subunit 8 or subunit 6
Creators: name: Watkins, Linton Campbell.
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.
Playing with the enveloping algebra of supersymmetry
Creators: name: Cattaruzza, E.
name: Gozzi, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we show how to obtain from a scalar superfield its first component via a similarity transformation. We prove that in D=4 the generators of this similarity transformation live in the enveloping algebra of supersymmetry while for D=1 they belong to the basic algebra.
description: some typos corrected and some hats removed
Properties of intra-cluster low-mass X-ray binaries in Fornax globular clusters
Creators: name: Riccio, G.
name: Paolillo, M.
name: Cantiello, M.
name: Jin, R. D'Abrusco X.
name: Li, Z.
name: Puzia, T.
name: Mieske, S.
name: Prole, D. J.
name: Iodice, E.
name: D'Ago, G.
name: Gatto, M.
name: Spavone, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a study of the intra-cluster population of low-mass X-ray binaries (LMXB) residing in globular clusters (GC) in the central 1 $deg^2$ of the Fornax galaxy cluster. Differently from previous studies, which were restricted to the innermost regions of individual galaxies, this work is aimed at comparing the properties of the intra-cluster population of GC-LMXBs with those of the host galaxy. We use VLT Survey Telescope (VST) and Chandra observations. We identify 168 LMXBs residing in GCs and divide it into host-galaxy and intra-cluster objects based on their distance from the nearest galaxy in terms of effective radius. We found 82 intra-cluster GC-LMXBs and 86 objects that are hosted in galaxies. We perform a Gaussian mixture model to divide the population into red and blue GCs. As has been found for the innermost regions of galaxies, LMXBs tend to form in red and bright GCs in intra-cluster space as well. We find, however, that the likelihood of a red GC to host an LMXB decreases with galactocentric distance, but it remains approximately constant for the blue GC population. Investigating the X-ray properties of the LMXBs residing in GCs, we find a difference in the X-ray luminosity function between the intra-cluster and host-galaxy sample: both follow a power-law down to $\sim 8.5\times 10^{37}$ erg s$^{-1}$, which is consistent with field LMXBs for the intra-cluster sample, while the latter agree with previous estimates for LMXBs in GCs. We detect a tentative difference in the hardness ratio of two populations, where the intra-cluster GC-LMXBs appear to have harder spectra than the host-galaxy objects. We find the same trend when we compare red and blue GC-LMXBs: the spectra of the blue sample are harder spectra than those of the red sample. This result could suggest a relation between the spectral properties of LMXBs and the host GC colour and therefore its metallicity.
description: Accepted by A&A
Quantum gravity on foliated spacetime - asymptotically safe and sound
Creators: name: Biemans, Jorn
name: Platania, Alessia
name: Saueressig, Frank
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Asymptotic Safety provides a mechanism for constructing a consistent and predictive quantum theory of gravity valid on all length scales. Its key ingredient is a non-Gaussian fixed point of the gravitational renormalization group flow which controls the scaling of couplings and correlation functions at high energy. In this work we use a functional renormalization group equation adapted to the ADM-formalism for evaluating the gravitational renormalization group flow on a cosmological Friedmann-Robertson-Walker background. Besides possessing the UV-non-Gaussian fixed point characteristic for Asymptotic Safety the setting exhibits a second non-Gaussian fixed point with a positive Newton's constant and real critical exponents. The new fixed point alters the phase diagram in such a way that all renormalization group trajectories connected to classical general relativity are well-defined on all length scales. In particular a positive cosmological constant is dynamically driven to zero in the deep infrared. Moreover, the scaling dimensions associated with the universality classes emerging within the causal setting exhibit qualitative agreement with results found within the $ε$-expansion around two dimensions, Monte Carlo simulations based on Lattice Quantum Gravity, and the discretized Wheeler-deWitt equation.
description: 7 pages, 3 figures. Conclusions slightly modified
Enhancement of baryon-to-meson ratios around jets as a signature of medium response
Creators: name: Luo, Ao
name: Mao, Ya-Xian
name: Qin, Guang-You
name: Wang, En-Ke
name: Zhang, Han-Zhong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a unique signal of jet-induced medium excitations: the enhancement of baryon-to-meson ratios around the quenched jets.To illustrate this, we study jet-particle correlations and the distributions of jet-induced identified particles with respect to the jet direction in Pb+Pb collisions at the LHC via a multi-phase transport model.We find a strong enhancement of baryon-to-meson ratios for associated particles at intermediate transverse momentum around the triggered jets in Pb+Pb collisions relative to p+p collisions, due to the coalescence of jet-excited medium partons.Since the lost energy from jets can diffuse to large angles, such baryon-to-meson-ratio enhancement is more pronounced for larger relative distance from the jet axis.We argue that the experimental confirmation of the enhancement of jet-induced baryon-to-meson ratios around the jets will provide an unambiguous evidence for the medium response to jet quenching in heavy-ion collisions.
description: 6 pages, 3 figures
Many-body excitations and de-excitations in trapped ultracold bosonic clouds
Creators: name: Theisen, Marcus
name: Streltsov, Alexej I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences
subject: J.2

description: We employ the MultiConfiguraional Time-Dependent Hartree for Bosons (MCTDHB) method to study excited states of interacting Bose-Einstein condensates confined by harmonic and double-well trap potentials. Two approaches to access excitations, a static and a dynamic one, have been studied and contrasted. In static simulations the low-lying excitations have been computed by utilizing the LR-MCTDHB method - a linear response theory constructed on-top of a static MCTDHB solution. Complimentary, we propose two dynamic protocols that address excitations by propagating the MCTDHB wave-function. In particular, we investigate dipole-like oscillations induced by shifting the origin of the confining potential and breathing-like excitations by quenching frequency of a parabolic part of the trap. To contrast static predictions and dynamic results we have computed time-evolutions and their Fourier transforms of several local and non-local observables. Namely, we study evolution of the $\left< x(t) \right>$, its variance $\operatorname{Var}(x(t))$, and of a local density computed at a selected position. We found out that the variance is the most sensitive and informative quantity - along with excitations it contains information about the de-excitations even in a linear regime of the induced dynamics. The dynamic protocols are found to access the many-body excitations predicted by the static LR-MCTDHB approach.
description: 20 pages, 8 figures