cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Supermassive black hole seeds from sub-keV dark matter
Creators: name: Friedlander, Avi
name: Schon, Sarah
name: Vincent, Aaron C.
Publisher: name: arXiv
Year: 2022
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: Quasars observed at redshifts $z\sim 6-7.5$ are powered by supermassive black holes which are too large to have grown from early stellar remnants without efficient super-Eddington accretion. A proposal for alleviating this tension is for dust and metal-free gas clouds to have undergone a process of direct collapse, producing black hole seeds of mass $M_\textrm{seed}\sim10^5 M_\odot$ around redshift $z \sim 17$. For direct collapse to occur, a large flux of UV photons must exist to photodissociate molecular hydrogen, allowing the gas to cool slowly and avoid fragmentation. We investigate the possibility of sub-keV mass dark matter decaying or annihilating to produce the UV flux needed to cause direct collapse. We find that annihilating dark matter with a mass in the range of $13.6 \textrm{ eV} \le m_{dm} \le 20 \textrm{ eV}$ can produce the required flux while avoiding existing constraints. A non-thermally produced dark matter particle which comprises the entire dark matter abundance requires a thermally averaged cross section of $\langleσv \rangle \sim 10^{-35}$ cm$^3/$s. Alternatively, the flux could originate from a thermal relic which comprises only a fraction $\sim10^{-9}$ of the total dark matter density. Decaying dark matter models which are unconstrained by independent astrophysical observations are unable to sufficiently suppress molecular hydrogen, except in gas clouds embedded in dark matter halos which are larger, cuspier, or more concentrated than current simulations predict. Lastly, we explore how our results could change with the inclusion of full three-dimensional effects. Notably, we demonstrate that if the $\mathrm{H}_2$ self-shielding is less than the conservative estimate used in this work, the range of both annihilating and decaying dark matter models which can cause direct collapse is significantly increased.
description: 24 pages, 9 figures. Updated to match published version
The optimal schedule for pulsar timing array observations
Creators: name: Lee, K. J.
name: Bassa, C. G.
name: Karuppusamy, R.
name: Kramer, M.
name: Smits, R.
name: Stappers, B. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In order to maximize the sensitivity of pulsar timing arrays to a stochastic gravitational wave background, we present computational techniques to optimize observing schedules. The techniques are applicable to both single and multi-telescope experiments. The observing schedule is optimized for each telescope by adjusting the observing time allocated to each pulsar while keeping the total amount of observing time constant. The optimized schedule depends on the timing noise characteristics of each individual pulsar as well as the performance of instrumentation. Several examples are given to illustrate the effects of different types of noise. A method to select the most suitable pulsars to be included in a pulsar timing array project is also presented.
description: 16 pages, 6 figures, accepted by MNRAS
Tales of Transformation
Creators: name: Göttler, Christine
Publisher: name: 21: Inquiries into Art, History, and the Visual
Year: 2020

description: The rhetoric of secrecy played an important role in the early modern fashioning of painting as a specialized kind of knowledge about the visible and invisible worlds. This article explores Goltzius’s use of secrecy in regard to his largest and perhaps most enigmatic composition, which is also his only painted work that includes a self-portrait. With its explicit references to the processes of alchemical transformation the work draws attention to the enigma of artistic creation and the mutability and versatility of Goltzius’s art. The witty play with various attributes alludes to the multiple roles and guises an artist could assume, and the abundance of detail reflects on the mercurial power of painting as an art that links and connects the worlds of knowledge and deceit. The article argues for a dynamic and discursive notion of subject that challenges rather than satisfies the viewer’s imagination and explores rather than asserts knowledges and ideas.
description: 21: Inquiries into Art, History, and the Visual, Vol 1 No 2 (2020): 21: Inquiries into Art, History, and the Visual. Beiträge zur Kunstgeschichte und visuellen Kultur
QuOCS: The Quantum Optimal Control Suite
Creators: name: Rossignolo, Marco
name: Reisser, Thomas
name: Marshall, Alastair
name: Rembold, Phila
name: Pagano, Alice
name: Vetter, Philipp J.
name: Said, Ressa S.
name: Müller, Matthias M.
name: Motzoi, Felix
name: Calarco, Tommaso
name: Jelezko, Fedor
name: Montangero, Simone
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum optimal control includes the family of pulse-shaping algorithms that aim to unlock the full potential of a variety of quantum technologies. Our Quantum Optimal Control Suite (QuOCS) unites experimental focus and model-based approaches in a unified framework. The easy usage and installation of QuOCS and the availability of various combinable optimization strategies is designed to improve the performance of many quantum technology platforms, such as color defects in diamond, superconducting qubits, atom- or ion-based quantum computers. It can also be applied to the study of more general phenomena in physics. In this paper, we describe the software and the main toolbox of gradient-free and gradient-based algorithms. We then show how the user can connect it to their experiment. In addition, we provide illustrative examples where our optimization suite solves typical quantum optimal control problems, in both open- and closed-loop settings. Integration into existing experimental control software is already provided for the experiment control software Qudi [J. M. Binder et al., SoftwareX, 6, 85-90, (2017)], and further extensions are investigated and highly encouraged. QuOCS is available from GitHub, under Apache License 2.0, and can be found on the PyPI repository.
description: 24 pages, 7 figures
Farberhaltung bei marinen Mollusken des Oligozäns und Miozäns der Niederrheinischen Bucht
Creators: name: Hartkopf-Fröder, Christoph
name: Hocht, Fritz Von Der
Publisher: name: Archäologie im Rheinland
Year: 2020

description: Archäologie im Rheinland, 2016(2017)
Theory And Applications Of Mathematical Cartographic Modelling Of Topography
Creators: name: Florinsky, I.V.
Publisher: name: Zenodo
Year: 2010
Subjects: digital terrain modelling
geomorphometry
curvature

description: Florinsky, I.V., 2010. Theory and Applications of Mathematical Cartographic Modelling of Topography. D.Sc. Thesis. Institute of Mathematical Problems of Biology, Russian Academy of Sciences, Pushchino, 267 p. (in Russian).

Флоринский И.В. Теория и приложения математико-картографического моделирования рельефа. Дис. … д.т.н. Пущино: ИМПБ РАН, 2010, 267 с.
title: Η σημασία της  ανακύκλωσης στο σύγχρονο βιομηχανοποιημένο κόσμο. Διερεύνηση των γνώσεων και των απόψεων των κατοίκων της Κρήτης
title: The significance of recycling in the modern industrialized world. Investigation of the knowledge and views of citizens in Crete
Creators: name: Κλαριδοπουλου Ασπασια
Publisher: name: Technical University of Crete
Year: 2023

description: Η ανακύκλωση είναι ένα πολύ σημαντικό ζήτημα κάθε που εποχής και κυρίως της σύγχρονης, λόγω των τεράστιων περιβαλλοντικών προβλημάτων που αναδύονται συνεχώς. Μέσα από τη συγκεκριμένη διπλωματική διατριβή στόχος είναι να παρουσιαστεί η κατάσταση της ανακύκλωσης στην Περιφερειακή Ενότητα της Κρήτης. Για να μπορέσει να γίνει αυτό χρησιμοποιήθηκε η ποσοτική μεθοδολογία και πιο συγκεκριμένα επιλέχθηκε το ερευνητικό εργαλείο του ερωτηματολογίου, το οποίο μοιράστηκε σε 120 συμμετέχοντες, που κατάγονταν από περιοχές της Κρήτης. Με βάση τα αποτελέσματα που προέκυψαν φάνηκε πως η ανακύκλωση στο νησί βρίσκεται σε πολύ ικανοποιητικά ποσοστά, ενώ οι περισσότεροι από τους συμμετέχοντες γνώριζαν τον τρόπο, με τον οποίο οι ίδιοι μπορούν να ανακυκλώσουν τα υλικά τους. Μάλιστα επικεντρώνονται κυρίως στην ανακύκλωση του γυαλιού και του χαρτιού, χωρίς ωστόσο να ενημερώνονται ιδιαίτερα γύρω από τις διαδικασίες που ακολουθούνται ή γύρω από τα οφέλη που μπορεί να έχει η ίδια. Δηλώνουν όμως πως θεωρούν ότι σίγουρα συμβάλλει στη βελτίωση της ποιότητας ζωής του ανθρώπου και της κοινωνικής ευημερίας.
SISTEM MONITORING DISCHARGE BATTERY PADA PLTS BERBASIS INTERNET of THINGS (IoT)
Creators: name: Primawan, AB
name: Emanuel, Y
Publisher: name: Zenodo
Year: 2023

description: The use of Solar Power Plants (PLTS) as a renewable energy source to replace fossil fuels is a positive step towards reducing environmental impact. However, a common issue in PLTS usage is battery over-discharge, which is attributed to the manual battery monitoring system. To address this issue, the Internet of Things (IoT) emerges as a solution that enables remote monitoring when batteries are in a discharged state. By utilizing the INA219 sensor to detect battery current and voltage sensors to measure battery voltage, this monitoring system can accurately measure power, capacity, and battery usage status. This data is transmitted and stored in a real-time Firebase database and can be accessed through an Android application created using MIT App Inventor. The testing results of this system have successfully demonstrated its ability to read, transmit, and display sensor data in accordance with the design. However, system performance may be affected by network speed during data transmission, and the value of battery capacity used during the discharge process is highly dependent on the calculation formulas and sensor types used. Overall, a well designed application can efficiently display data from Firebase. Thus, this system can be considered a fairly effective solution to address the issue of battery over-discharge in PLTS.
Strong Plasmonic Enhancement of Photovoltage in Graphene
Creators: name: Echtermeyer, T. J.
name: Britnell, L.
name: Jasnos, P. K.
name: Lombardo, A.
name: Gorbachev, R. V.
name: Grigorenko, A. N.
name: Geim, A. K.
name: Ferrari, A. C.
name: Novoselov, K. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Amongst the wide spectrum of potential applications of graphene, ranging from transistors and chemical-sensors to nanoelectromechanical devices and composites, the field of photonics and optoelectronics is believed to be one of the most promising. Indeed, graphene's suitability for high-speed photodetection was demonstrated in an optical communication link operating at 10 Gbit/s\cite. However, the low responsivity of graphene-based photodetectors compared to traditional III-V based ones is a potential drawback. Here we show that, by combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodectors can be increased by up to 20 times, due to field concentration in the area of a p-n junction. Additionally, wavelength and polarization selectivity can be achieved employing nanostructures of different geometries.
Form, function and biological role in the locomotory apparatus of the genus Odocoileus in Alberta (Mammalia: Artiodactyla)
Creators: name: Eslinger, Dale H.
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: QL 737 U55 E85 1977 Microfiche
subject: Mule deer
subject: White-tailed deer
subject: Deer - Alberta

description: Bibliography: p. 162-165.
Polymers for proteomics : development of polyglycidol-based soluble ester-linked aldehydes and their peptide binding characteristics
Creators: name: Beaudette, Patrick Edmund
Publisher: name: University of British Columbia
Year: 2009

description: High molecular weight hyperbranched polyglycerol (HPG) was selected for development as a soluble polymer support for the targeted selection and release of primary amine containing peptides from a complex mixture. HPG has been functionalized with an ester-linked aldehyde group, that can be cleaved off under basic conditions, for the binding of primary amine containing peptides via a reductive alkylation reaction. Once bound, the high molecular weight of the polymer facilitates separation from a complex peptide mixture by employing either a 30-kDa molecular weight cut-off membrane or precipitation in acetonitrile. Following separation and washing of the polymer to remove unbound peptides and reagents, hydrolysis of the ester linker releases the bound peptide into solution for analysis by mass spectrometry. Released peptides retain the polymer linker moiety and are therefore characteristically mass-shifted. Four cleavable aldehyde polymers (PG1, PG2, PG3, and PG5) and a cleavable succinimidyl succinate polymer (PG4) have been prepared and characterized, each demonstrating the ability to selectively bind primary amine peptides from a complex mixture containing blocked (dimethylated tertiary amine) and unblocked (primary amine) peptides. The polymers have low non-specific binding properties and exhibit a range of reactivity and binding capacity. The specificity towards primary amines was designed to capture the cleavage products generated during proteolysis of a peptide library for the purpose of protease specificity profiling. PG2 was selected as the most promising candidate for having the best binding capacity of the tested polymers and no detectable non-specific binding effects.
The Form and function of the North American badger (Taxidea taxus) in relation to its fossorial way of life
Creators: name: Quaife, L. Ronald
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: QL 708.5 Q33 1978 Microfiche
subject: Badger, American
subject: Mustelidae
subject: Anatomy, Comparative
subject: Phylogeny
subject: Animal behavior

description: Bibliography: p. 191-197.
description: Comparatively few studies have been conducted on members of the Mustelidae, relative to many other carnivoran families. In particular, many of the behavioral and anatomical aspects of the biology of the seven genera of mustelids known as 11 badgers 11 have not been definitively described. Concommitantly, phylogenetic and taxonomic relationships are unclear. The following thesis investigates the ethology and morphology of the North American Badger (Taudea .ta.xU/2 ) as they relate to the fossorial habit, and provides comparative data on other badger genera (Mele-o , My da U/2 , Mel.livoM, Me.log ale, SuLU..o.ta. xU/2 and Ah..do nyx) with which to better establish the phylogenetic relationships among members of this fossorial mustelid complex . Study design was l.) en.1.> u Gans (1966) who suggested that in studying functional morphology, behavior and anatomy must be investigated in concert to provide a biologically real context in which to view results. Analysis of the digging behavior of Taudea was conducted using high speed cinematographic techniques. Four readily distinguishable behavioral patterns of digging were discerned, and are described. Osteological morphology of the manus, antebrachium and brachium is described, and presented in graphic terms for all badger forms. Musculature appropriate to the fossorial habit of Taudea is provided in detail and is compared to that of non-fossorial mustelids and a generalized (C~nid) carnivore. Morphological adaptations for the fossorial way of life l".6e.n.1.>u Van Valen, 19701 and the potential for power production are analyzed in terms of relative biomechanical efficiency for digging, and, where possible, comparisons are statistically analyzed.
Structure of the hot molecular core G10.47+0.03
Creators: name: Rolffs, Rainer
name: Schilke, Peter
name: Zhang, Qizhou
name: Zapata, Luis
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The physical structure of hot molecular cores, where forming massive stars have heated up dense dust and gas, but have not yet ionized the molecules, poses a prominent challenge in the research of high-mass star formation and astrochemistry. We aim at constraining the spatial distribution of density, temperature, velocity field, and chemical abundances in the hot molecular core G10.47+0.03. With the Submillimeter Array (SMA), we obtained high spatial and spectral resolution of a multitude of molecular lines at different frequencies, including at 690 GHz. At 345 GHz, our beam size is 0.3", corresponding to 3000 AU. We analyze the data using the three-dimensional dust and line radiative transfer code RADMC-3D, and myXCLASS for line identification. We find hundreds of molecular lines from complex molecules and high excitations. Even vibrationally excited HC15N at 690 GHz is detected. The HCN abundance at high temperatures is very high. Absorption against the dust continuum occurs in twelve transitions, whose shape implies an outflow along the line-of-sight. Outside the continuum peak, the line shapes are indicative of infall. Dust continuum and molecular line emission are resolved at 345 GHz, revealing central flattening and rapid radial falloff of the density outwards of 10^4 AU, best reproduced by a Plummer radial profile of the density. No fragmentation is detected, but modeling of the line shapes of vibrationally excited HCN suggests the density to be clumpy. We conclude that G10.47+0.03 is characterized by beginning of feedback from massive stars, while infall is ongoing. Large gas masses (hundreds of Msun) are heated to high temperatures, aided by diffusion of radiation in a high-column-density environment. The increased thermal, radiative, turbulent, and wind-driven pressure drives expansion in the central region and is likely responsible for the central flattening of the density.
description: 22 pages, 22 figures, accepted for publication in A&A
Lagoon site (OjR1-3): implications for Paleoeskimo interactions
Creators: name: Arnold, Charles D.
Publisher: name: University of Calgary
Year: 1978
Subjects: subject: E 78 N79 A74 1978 Microfiche
subject: Indians of North America - Northwest Territories - Banks Island
subject: Lagoon site (OjR1-3)
subject: Excavations (Archaeology) - Northwest Territories - Banks Island
subject: Eskimos - Antiquities

description: Bibliography: p. 188-203.
Near-infrared characterization of ultra-diffuse galaxies in Abell 2744 by JWST/NIRISS imaging
Creators: name: Ikeda, Ryota
name: Morishita, Takahiro
name: Tsukui, Takafumi
name: Vulcani, Benedetta
name: Trenti, Michele
name: Metha, Benjamin
name: Acebron, Ana
name: Bergamini, Pietro
name: Grillo, Claudio
name: Iono, Daisuke
name: Mercurio, Amata
name: Rosati, Piero
name: Vanzella, Eros
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a search and characterization of ultra-diffuse galaxies (UDGs) in the Frontier Fields cluster Abell~2744 at $z=0.308$. We use JWST/NIRISS F200W observations, acquired as part of the GLASS-JWST Early Release Science Program, aiming to characterize morphologies of cluster UDGs and their diffuse stellar components. A total number of 22 UDGs are identified by our selection criteria using morphological parameters, down to stellar mass of $\sim10^{7}M_{\odot}$. The selected UDGs are systematically larger in effective radius in F200W than in HST/ACS F814W images, which implies that some of them would not have been identified as UDGs when selected at rest-frame optical wavelengths. In fact, we find that about one third of the UDGs were not previously identified based on the F814W data. We observe a flat distribution of the UDGs in the stellar mass-size plane, similar to what is found for cluster quiescent galaxies at comparable mass. Our pilot study using the new JWST F200W filter showcases the efficiency of searching UDGs at cosmological distances, with 1/30 of the exposure time of the previous deep observing campaign with HST. Further studies with JWST focusing on spatially-resolved properties of individual sources will provide insight into their origin.
description: Accepted for publication in MNRAS, 10 pages, 7 figures, 2 tables
Organic-mineral interactions under natural conditions -- a computational study of flavone adsorption on smectite clay
Creators: name: Nuruzade, Omar
name: Abdullayev, Elshan
name: Erastova, Valentina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Interactions between organic species and natural minerals are fundamental to the processes around us. With the aid of molecular dynamics simulations, we identify key adsorption mechanisms of apigenin on smectite clay minerals. The mechanism is highly sensitive to the pH -- changing from co-crystallisation in acidic-to-neutral solutions to the ion-bridging in mild-alkaline. The ionic species play a significant role in alkaline environments: the deprotonated apigenin species chelate metals, which, in turn, leads to the formation of a stable organic-metal-mineral complex and stronger adsorption in the presence of divalent cations.Smectite clays buffer the solution to mildly alkaline; hence, the type of exchangeable cations in the clay will be critical in determining the adsorption mechanism and organic retention capacity. Overall, our study showcases a computational strategy that can be transferred to a wide variety of organic-mineral systems in the natural environment.
Coherent frequency conversion in a superconducting artificial atom with two internal degrees of freedom
Creators: name: Lecocq, Florent
name: Pop, Ioan M.
name: Matei, Iulian
name: Dumur, Etienne
name: Feofanov, A. K.
name: Naud, Cécile
name: GUICHARD, Wiebke
name: Buisson, Olivier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: By adding a large inductance in a dc-SQUID phase qubit loop, one decouples the junctions' dynamics and creates a superconducting artificial atom with two internal degrees of freedom. In addition to the usual symmetric plasma mode ({\it s}-mode) which gives rise to the phase qubit, an anti-symmetric mode ({\it a}-mode) appears. These two modes can be described by two anharmonic oscillators with eigenstates $\ket{n_{s}}$ and $\ket{n_{a}}$ for the {\it s} and {\it a}-mode, respectively. We show that a strong nonlinear coupling between the modes leads to a large energy splitting between states $\ket{0_{s},1_{a}}$ and $\ket{2_{s},0_{a}}$. Finally, coherent frequency conversion is observed via free oscillations between the states $\ket{0_{s},1_{a}}$ and $\ket{2_{s},0_{a}}$.
Erwitte-Schmerlecke – das kleinste bandkeramische Erdwerk Westfalens
Creators: name: Becker, Valeska
name: Schierhold, Kerstin
name: Baales, Michael
Publisher: name: Archäologie in Westfalen-Lippe
Year: 2020

description: -
description: Archäologie in Westfalen-Lippe, ARCHÄOLOGIE IN WESTFALEN-LIPPE 2018 (2019)
Anharmonic effects on the reflectivity of CaS and MgS: A first-principles based study
Creators: name: Chmeruk, Artem
name: Núñez-Valdez, Maribel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We employ systematic calculations based on density functional theory to model the reflectivity of CaS and MgS in the infrared region. We show that in addition to the modeling using the harmonic approximation, an accurate spectral description requires the inclusion of anharmonic effects. Due to their conceptual simplicity, CaS and MgS are excellent systems for the explicit consideration of the anharmonicity, which we include here using a perturbative approach up to three-phonon scattering processes, and the consideration of isotopic disorder. All physical quantities, such as Born effective charges and dielectric constant, necessary for the calculation of the reflectivity within the Lorentz model are extracted from our first-principles computations. To validate our predicted optical and transversal modes, and reflectivity spectra, we compare them to available experimental results. We find that the overall agreement is good, which supports the importance of the inclusion of anharmonic terms in the modeling of optical properties in the infrared region.
The Inter-Eruption Timescale of Classical Novae from Expansion of the Z Camelopardalis Shell
Creators: name: Shara, Michael M.
name: Mizusawa, Trisha
name: Zurek, David
name: Martin, Christopher D.
name: Neill, James D.
name: Seibert, Mark
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The dwarf nova Z Camelopardalis is surrounded by the largest known classical nova shell. This shell demonstrates that at least some dwarf novae must have undergone classical nova eruptions in the past, and that at least some classical novae become dwarf novae long after their nova thermonuclear outbursts. The current size of the shell, its known distance, and the largest observed nova ejection velocity set a lower limit to the time since Z Cam's last outburst of 220 years. The brightest part of the Z Cam shell's radius is currently p ~ 1690 pixels. No expansion of the radius of the brightest part of the ejecta was detected, with an upper limit of pdot < 1 pixel/3 years. This suggests that the last Z Cam eruption occurred p/pdot > 5,000 years ago. However, including the important effect of deceleration as the ejecta sweeps up interstellar matter in its snowplow phase reduces the lower limit to 1300 years. This is the first strong test of the prediction of nova thermonuclear runaway theory that the inter-outburst times of classical novae are longer than 1000 yr. The intriguing suggestion that Z Cam was a bright nova, recorded by Chinese imperial astrologers in October - November 77 BCE, is consistent with our measurements. If Z Cam was indeed the nova of 77 BCE we predict that its ejecta are currently expanding at 85 km/s, or 0.11 arcsec/yr. Detection and measurement of this rate of expansion are doable in just a few years.
description: 6 figures, submitted to the Astrophysical Journal
Fermion disorder operator at Gross-Neveu and deconfined quantum criticalities
Creators: name: Liu, Zi Hong
name: Jiang, Weilun
name: Chen, Bin-Bin
name: Rong, Junchen
name: Cheng, Meng
name: Sun, Kai
name: Meng, Zi Yang
name: Assaad, Fakher F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The fermion disorder operator has been shown to reveal the entanglement information in 1D Luttinger liquids and 2D free and interacting Fermi and non-Fermi liquids emerging at quantum critical points(QCP). Here we study, by means of large-scale quantum Monte Carlo simulation, the scaling behavior of disorder operator in correlated Dirac systems. We first demonstrate the logarithmic scaling behavior of the disorder operator at the Gross-Neveu (GN) chiral Ising and Heisenberg QCPs, where consistent conformal field theory (CFT) content of the GN-QCP in its coefficient is found. Then we study a 2D monopole free deconfined quantum critical point (DQCP) realized between a quantum-spin Hall insulator and a superconductor. Our data point to negative values of the logarithmic coefficients such that the DQCP does not correspond to a unitary CFT. Density matrix renormalization group calculations of the disorder operator on a 1D DQCP model also detect emergent continuous symmetries.
description: 16 pages, 18 figures
Plastic rotation of reinforced concrete members subjected to bending, axial load and shear
Creators: name: Tadros, Gamil Sabri
Publisher: name: University of Calgary
Year: 1970
Subjects: subject: TA 683.5 B3 T33 1970 Microfilm
subject: Concrete beams
subject: Reinforced concrete construction

description: Bibliography: p. 268-277.
Initial and time-dependent deflections of reinforced concrete members due to flexure and shear
Creators: name: Abele, Gunther
Publisher: name: Engineering
Year: 1971
Subjects: subject: TA 683.5 B3 A34 1970 Microfiche
subject: Concrete beams
subject: Reinforced concrete construction
subject: Creep of concrete

description: Bibliography: p. 65-68.
Dark $SU(2) \to Z_3 \times Z_2$ Gauge Symmetry
Creators: name: Borah, Debasish
name: Ma, Ernest
name: Nanda, Dibyendu
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dark sector is postulated to be invariant under an $SU(2)$ gauge symmetry, spontaneously broken by a Higgs quadruplet to a conserved residual $Z_3 \times Z_2$ symmetry. The resulting dark matter phenomenology is studied.
description: 17 pages, 5 captioned figures, matches version accepted for publication in Phys. Lett. B
Sub-arcminute localization of 13 repeating fast radio bursts detected by CHIME/FRB
Creators: name: Michilli, Daniele
name: Bhardwaj, Mohit
name: Brar, Charanjot
name: Patel, Chitrang
name: Gaensler, B. M.
name: Kaspi, Victoria M.
name: Kirichenko, Aida
name: Masui, Kiyoshi W.
name: Sand, Ketan R.
name: Scholz, Paul
name: Shin, Kaitlyn
name: Stairs, Ingrid
name: Cassanelli, Tomas
name: Cook, Amanda M.
name: Dobbs, Matt
name: Dong, Fengqiu Adam
name: Fonseca, Emmanuel
name: Ibik, Adaeze
name: Kaczmarek, Jane
name: Leung, Calvin
name: Pearlman, Aaron B.
name: Petroff, Emily
name: Pleunis, Ziggy
name: Rafiei-Ravandi, Masoud
name: Sanghavi, Pranav
name: Tendulkar, Shriharsh P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on improved sky localizations of thirteen repeating fast radio bursts (FRBs) discovered by CHIME/FRB via the use of interferometric techniques on channelized voltages from the telescope. These so-called 'baseband localizations' improve the localization uncertainty area presented in past studies by more than three orders of magnitude. The improved localization regions are provided for the full sample of FRBs to enable follow-up studies. The localization uncertainties, together with limits on the source distances from their dispersion measures (DMs), allow us to identify likely host galaxies for two of the FRB sources. FRB 20180814A lives in a massive passive red spiral at z~0.068 with very little indication of star formation, while FRB 20190303A resides in a merging pair of spiral galaxies at z~0.064 undergoing significant star formation. These galaxies show very different characteristics, further confirming the presence of FRB progenitors in a variety of environments even among the repeating sub-class.
Ductible slab-column connections
Creators: name: Andra, Hans-Peter W.
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: TA 683.5 S6 A56 1977 Microfiche
subject: Reinforced concrete construction
subject: Concrete slabs - Testing
subject: Columns, Concrete - Testing

description: Bibliography: p. 200-203.
The Irregular Variable Ku Her: The Light And Period Variations
Creators: name: Sipahi, Esin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present CCD photometric observations of the slow irregular type variable KU Her. We have also used observations from the ASAS Database and the AAVSO International Database. The V-band observations span eight years from August of 2002 to September of 2010. The length and density of the data enable us to look for variations on time scales ranging from days to years. The V-band observations of KU Her are analysed to derive periodicity. This analysis was an approach to find the fundamental periods of the variability of KU Her. Analysis of the KU Her light variation indicates a complex combination of different periods. Five main and three harmonic periods are identified. In addition to the period analysis, we present the colour variations of the star.
description: 14 pages, 4 figures
project_nisuit
Creators: name: Mizrahi, Neta
name: Hacohen, Noam
name: Illy Israeli
name: TAU Experimental Psychology Team
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Psychology
subject: FOS: Psychology
subject: Social and Behavioral Sciences

description: Pre-registration for our research, for our "Research Methods in Psychology" course at Tel-Aviv University
The effects of endurance training and age on left ventricular rotation
Creators: name: Esch, Ben
Publisher: name: University of British Columbia
Year: 2009

description: Recent advances in cardiac ultrasound allow for the effective assessment of left ventricular (LV) rotation. LV rotation makes systole more efficient, and significantly aids diastolic filling. To date little information exists on LV rotation in endurance-trained individuals across the lifespan. Therefore, the purpose of this series of investigations was to describe the effects of endurance training and age on LV rotation. In the first investigation, resting LV rotation was assessed with echocardiography and speckle-tracking analysis in 52 athletes ranging in age from 24-76. Athletes were divided into young (≤ 44 years) and older (> 45 years). Neither peak torsion (Old: 16.8±6.4°; Young: 15.0±4.4°) or peak recoil rate (Old: -127.8±48.2°/s; Young: -106.4±39.6°/s) were significantly different between young and old athletes, suggesting preservation of cardiac function with lifelong exercise training. In an attempt to discern the impact of aging on exercising LV rotation, speckle-tracking analysis was used to compare heart transplant recipients (HTR, age: 61 ± 9 years) with recipient (RM, age: 60 ± 12 years) and donor (DM, age: 35 ± 8 years) age-matched individuals. In response to exercise, DM significantly increased peak torsion and peak recoil rate, whereas RM could not. Despite having a heart 25 years younger, LV rotation in HTR was similar to RM, suggesting accelerated aging of the cardiac allograft. Considering pre-transplant etiology, surgery and medications, it is encouraging that HTR responded similarly to healthy RM. In the third experiment, the relationship between preload reduction with lower body negative pressure (LBNP) and LV recoil was compared in normally active and endurance-trained individuals. The major finding of this investigation was that in response to LBNP, normally active individuals were able to increase LV recoil rate; whereas LV recoil rate slowed in endurance athletes during preload reduction. This training mediated LV rotational difference may be an additional mechanism which can help explain the higher incidence of orthostatic intolerance in athletes. Together, these findings add significantly to the small number of investigations examining LV rotation in endurance-athletes and contribute to the foundation for future experiments in this emerging area of research.
Three fluid hydrodynamics of spin-1 Bose-Einstein condensates
Creators: name: Szirmai, Gergely
name: Szepfalusy, Peter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study excitations of the spin-1 Bose gas at finite temperatures and in the presence of a not so strong magnetic field, or equivalently, when the gas sample is partially polarized. Motivated by the success of two-fluid hydrodynamics of scalar superfluids we develop a three-fluid hydrodynamic description to treat the low frequency and long wavelength excitations of the spin-1 Bose gas. We derive the coupled linear hydrodynamic equations of the three sounds and evaluate them numerically in a self-consistent mean field approximation valid for the dilute gas at the intermediate and critical temperature regions. In this latter region we identify the critical mode.
Sending femtosecond pulses in circles: highly non-paraxial accelerating beams
Creators: name: Courvoisier, F.
name: Mathis, A.
name: Froehly, L.
name: Giust, R.
name: Furfaro, L.
name: Lacourt, P. -A.
name: Jacquot, M.
name: Dudley, J. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We use caustic beam shaping on 100 fs pulses to experimentally generate non-paraxial accelerating beams along a 60 degree circular arc, moving laterally by 14 \mum over a 28 \mum propagation length. This is the highest degree of transverse acceleration reported to our knowledge. Using diffraction integral theory and numerical beam propagation simulations, we show that circular acceleration trajectories represent a unique class of non-paraxial diffraction-free beam profile which also preserves the femtosecond temporal structure in the vicinity of the caustic.
The dust emission SED of X-ray emitting regions in Stephan's Quintet
Creators: name: Natale, G.
name: Tuffs, R. J.
name: Xu, C. K.
name: Popescu, C. C.
name: Fischera, J.
name: Lisenfeld, U.
name: Lu, N.
name: Appleton, P.
name: Dopita, M.
name: Duc, P. -A.
name: Gao, Y.
name: Reach, W.
name: Sulentic, J.
name: Yun, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analysed the Spitzer maps of Stephan's Quintet in order to investigate the nature of the dust emission associated with the X-ray emitting regions of the large scale intergalactic shock and of the group halo. This emission can in principle be powered by dust-gas particle collisions, thus providing efficient cooling of the hot gas. However the results of our analysis suggest that the dust emission from those regions is mostly powered by photons. Nonetheless dust collisional heating could be important in determining the cooling of the IGM gas and the large scale star formation morphology observed in SQ.
description: Conference proceedings IAU Symposium 284 "The Spectral energy distribution of galaxies", 5-9 September 2011, Preston, UK
Resurgence in 2-dimensional Yang-Mills and a genus altering deformation
Creators: name: Fujimori, Toshiaki
name: Glass, Philip
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study resurgence in the context of the partition function of 2-dimensional $SU(N)$ and $U(N)$ Yang-Mills theory on a surface of genus $h$. After discussing the properties of the transseries in the undeformed theory, we add a term to the action to deform the theory. The partition function can still be calculated exactly, and the deformation has the effect of analytically continuing the effective genus parameter in the exact answer to be non-integer. In the deformed theory we find new saddle solutions and study their properties. In this context each saddle contributes an asymptotic series to the transseries which can be analysed using Borel-Ècalle resummation. For specific values of the deformation parameter we find Cheshire cat points where the asymptotic series in the transseries truncate to a few terms. We also find new partial differential equations satisfied by the partition function, and a number of applications of these are explained, including low-order/low-order resurgence.
description: 59 pages, 5 figures, minor clarifications
Propagation of Highly Efficient Star Formation in NGC 7000
Creators: name: Toujima, Hideyuki
name: Nagayama, Takumi
name: Omodaka, Toshihiro
name: Handa, Toshihiro
name: Koyama, Yasuhiro
name: Kobayashi, Hideyuki
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We surveyed the (1,1), (2,2), and (3,3) lines of NH3 and the H2O maser toward the molecular cloud L935 in the extended HII region NGC 7000 with an angular resolution of 1.6' using the Kashima 34-m telescope. We found five clumps in the NH3 emission with a size of 0.2--1 pc and mass of 9--452 M_sun. The molecular gas in these clumps has a similar gas kinetic temperature of 11--15 K and a line width of 1--2 km/s. However, they have different star formation activities such as the concentration of T-Tauri type stars and the association of H2O maser sources. We found that these star formation activities are related to the geometry of the HII region. The clump associated with the T-Tauri type star cluster has a high star formation efficiency of 36--62%. This clump is located near the boundary of the HII region and molecular cloud. Therefore, we suggest that the star formation efficiency increases because of the triggered star formation.
description: 19 pages, 15 figures, accepted for PASJ Vol.63 No.6
Contrast inversion in neutral atom microscopy using atomic cluster beams
Creators: name: Bhardwaj, Geetika
name: Shirhatti, Pranav R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Applied Physics (physics.app-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: This work explores the possibility of atomic cluster beams as a probe for neutral atom microscopy (NAM) measurements. Using a beam of Kr clusters with mean size $\sim$ 10$^4$ atoms/cluster we demonstrate that topographical contrast can be obtained, similar to that in the case of monoatomic beams. Further, using atomically thin films of MoS$_2$ grown on SiO$_2$/Si substrate we show that NAM imaging using Kr clusters is also possible in domains where topographical contrast is not expected. Surprisingly, these images show an inverted contrast pattern when compared to the case of monoatomic beams. We attempt to understand these observations on the basis of angular distributions resulting from cluster-surface scattering. Finally, we discuss the implications of these results towards achieving a high lateral resolution neutral atom microscope using atomic cluster beams.
description: Main manuscript: 10 pages, 6 figures and Supplementary information: 5 pages, 5 figures
Creep production and creep analysis for concrete structures: a critical appraisal of the literature
Creators: name: Raghupatruni, Satyanarayana Rao
Publisher: name: University of Calgary
Year: 1977
Subjects: subject: TA 683.2 R33 1976 Microfiche
subject: Reinforced concrete construction
subject: Concrete - Creep

description: Bibliography: p. 218-222.
Berdyaev's concept of symbolic, definitive conceptualization and education
Creators: name: Wingerter, J. Richard
Publisher: name: University of Calgary
Year: 1979
Subjects: subject: LB 775 B44 W54 1979 Microfiche
subject: Berdiaev, Nikolai, 1874-1948
subject: Education (Philosophy)

description: Bibliography: p. 185-187.
A constrained cosmological model in $f(R,L_m)$ gravity
Creators: name: Singh, J. K.
name: Shaily
name: Myrzakulov, Ratbay
name: Balhara, Harshna
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this article, we study the expanding nature of universe in the contest of $f(R,L_m)$ gravity theory, here $ R $ represents the Ricci scalar and $ L_m $ is the matter Lagrangian density. With a specific form of $ f(R,L_m) $, we obtain the field equations for flat FLRW metric. We parametrize the deceleration parameter in terms of the Hubble parameter and from here we find four free parameters, which are constraints and estimated by using $H(z)$, $Pantheon$, and their joint data sets. Further, we investigate the evolution of the deceleration parameter which depicts a transition from the deceleration to acceleration phases of the universe. The evolution behaviour of energy density, pressure, and EoS parameters shows that the present model is an accelerated quintessence dark energy model. To compare our model with the $ Λ$CDM model we use some of the diagnostic techniques. Thus, we find that our model in $ f(R,L_m) $ gravity supports the recent standard observational studies and delineates the late-time cosmic acceleration.
description: 14 pages, 11 figures
Minimum quench power dissipation and current non-uniformity in ITER type NbTi cable-in-conduit conductor samples under DC conditions
Creators: name: Rolando, G.
name: van Lanen, E. P. A.
name: Nijhuis, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The level of current non-uniformity in NbTi CICCs sections near the joints in combination with the magnet field profile needs attention in view of proper joint design. The strand Joule power and current distribution at quench under DC conditions of two samples of ITER Poloidal Field Coil conductors, as tested in the SULTAN facility and of the so called PFCI Model Coil Insert, have been analyzed with the numerical cable model JackPot. The precise trajectories of all individual strands, joint design, cabling configuration, spatial distribution of the magnetic field, sample geometry and using experimentally determined interstrand resistance distributions have been taken into account. Although unable to predict the quench point due to the lack of a thermal-hydraulic routine, the model allows to assess the instantaneous strand power at quench and its local distribution in the cable, showing the hot spots, once the quench conditions in terms of current and temperature are experimentally known., The analysis points out the relation of the above mentioned factors with the DC quench stability of both short samples and coils. The possible small scale and local electrical-thermal interactions were ignored in order to examine the relevance of such effects in the overall prediction of the CICC performance The electromagnetic code shows an excellent quantitative predictive potential for CICC transport properties, excluding any freedom for matching the results. The influence of the local thermal effects in the modeling is identified as being marginal and far less than the generally accepted temperature margin for safe operation.