cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Particle filtering of dynamical networks: Highlighting observability issues
Creators: name: Montanari, Arthur N.
name: Aguirre, Luis A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In a network of high-dimensionality, it is not feasible to measure every single node. Thus, an important goal in the literature is to define the optimal choice of sensor nodes that provides a reliable state reconstruction of the network system state-space. This is an observability problem. In this paper, we propose a particle filtering (PF) framework as a way to assess observability properties of a dynamical network, where each node is composed by an individual dynamical system. The PF framework is applied on two benchmarks, networks of Kuramoto and Rössler oscillators, to investigate how the interplay between dynamics and topology impacts the network observability. Based on the numerical results, we conjecture that, when the network nodal dynamics are heterogeneous, better observability is conveyed for sets of sensor nodes that share some dynamical affinity to its neighbourhood. Moreover, we also investigate how the choice of an internal measured variable of a multidimensional sensor node affects the PF performance. The PF framework effectiveness as an observability measure is compared to a well-consolidated nonlinear observability metric for a small network case and some chaotic systems benchmarks.
Indications of causal set cosmology
Creators: name: Sorkin, Rafael D.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Within the context of a recently proposed family of stochastic dynamical laws for causal sets, one can ask whether the universe might have emerged from the quantum-gravity era with a large enough size and with sufficient homogeneity to explain its present-day large-scale structure. In general, such a scenario would be expected to require the introduction of very large or very small fundamental parameters into the theory. However, there are indications that such ``fine tuning'' is not necessary, and a large homogeneous and isotropic cosmos can emerge naturally, thanks to the action of a kind of renormalization group associated with cosmic cycles of expansion and re-contraction.
description: 7 pages, plainTeX. Wording has been clarified further in places Text of a talk entitled ``Causal Sets and Stochastic Spacetime''
Kinetics and mechanism of oxidation of [RuII(pic)3]- with peroxydisulfate in aqueous medium
Creators: name: Impert, Olga
name: Chatterjee, Debabrata
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Cell Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Plant Biology
subject: FOS: Biological sciences

description: The oxidation of [RuII(pic)3]- (pic- = picolinate) with peroxydisulfate (S2O82-) was studied spectrophotometrically and kinetically in aqueous solution. The rate of the reaction followed via absorbance at 466 nm (a metal-to-ligand charge transfer band of [RuII(pic)3)]-) and was found to be first-order in the Ru(II)-complex. The values of the observed rate constant (kobs) increased linearly with an increase in [S2O82-]. The rate of the reaction was found to be independent of pH in the studied range of 3.0 to 7.5. Alkali metal ions were found to have a positive influence (K+ > Na+ > Li+) on the rate of the oxidation. Kinetic data and activation parameters (ΔH≠ = 37 ± 1 kJ mol−1 and ΔS≠ = −129 ± 3 J mol−1 deg−1) are interpreted in terms of a mechanism involving outer-sphere electron transfer between the reaction partners. A detailed reaction mechanism in agreement with the spectral and kinetic data is presented and discussed with reference to that reported for the oxidation of [RuII(pic)3]- with H2O2.
Evidence for Supercurrent Quantization in Interfacial Josephson Junctions
Creators: name: Black, M. J.
name: Alphenaar, B. W.
name: Ahmed, H.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We observe a series of discontinuities in the above gap current/voltage characteristics of highly transmissive Nb/Si superconductor/semiconductor interfaces. The bias at which each switch occurs decreases in quantized steps as a function of temperature and magnetic field. The observed step-size is the same for both dependencies. We propose that the steps correspond to supercurrent quantization through granular Josephson junctions formed near the interface.
description: Submitted to PRL 8 pages, 4 figures. Text file is paper.tex and Figs. 1 - 4 are GIF files
title: Αρχιτεκτονική του χορού
titleType: AlternativeTitle
title: Architecture of dance
Creators: name: Tsompani, Theodora
Publisher: name: National Technological University of Athens
Year: 2012
Subjects: Χορός
Dance
Χορός δρόμου
Street dance
Δημόσιος χώρος
Public space
Τέχνη του δρόμου
Street art
Πόλη
City
Χορογραφία
Choreography
Πλατεία
Square
Συνθετικές αρχές
Synthetic principles

description: 62 σ.
description: Ο χορός και η αρχιτεκτονική είναι δύο επιστημονικά κι εκφραστικά πεδία που μελετούν και εκλογικεύουν την κίνηση του ανθρώπου στο χώρο. Αναπτύσσονται σε διαφορετικά επίπεδα , με διαφορετικά μέσα και οπτικές, κι έχουν ως σκοπό το καθένα να ανασυγκροτήσει τη φύση του αντικειμένου αναφοράς ( τον άνθρωπο,την κίνηση, το χώρο και την συνάρθρωσή τους). Πρόκειται για δύο πεδία που υπερβαίνουν τη σφαίρα της αναγκαιότητας, της λειτουργικότητας, τα όρια και τις παραδοχές και διευρύνουν την εποπτεία και τα μέσα τους. Η εργασία αναφέρεται τόσο σε μορφολογικές και συνθετικές αρχές που συνδέουν τον αρχιτεκτονικό σχεδιασμό και τη διαδικασία παραγωγής χορογραφιών, όσο και στο ιδεολογικό, κοινωνικό και πολιτιστικό υπόβαθρο που τα συνδέει. Ο χορός δρόμου αποτελεί εκφραστικό και καλλιτεχνικό μέσο του ανθρώπου στο χώρο, που εξυπηρετούν προθέσεις και σκοπούς , ατομικού ή συλλογικού χαρακτήρα.
description: Dance and architecture are two scientific and expressive fields that study and rationalize the movement of man in space. They grow at different levels, with different media and visual, and have each designed to reconstruct the nature of the object reference (man, motion, space and their coordination). These two fields expand the authority and their means, beyond the realm of necessity, functionality, limits and assumptions. The project refers to both morphological-synthetic principles related to architectural design and production choreographies, and the ideological, social and cultural background that links them. The street dance is expressive and artistic medium of man in space, serving intents and purposes, individual or collective.
Tetrameric gold(III) complexes with L-histidine-containing dipeptides: crystal structure of the highly hydrated chloride salt of [Au(L-Val-L-His)]42+ tetramer
Creators: name: Ašanin, Darko P.
name: Warżajtis, Beata
name: Andrejević, Tina P.
name: Savić, Nada D.
name: Glišić, Biljana Đ.
name: Djuran, Miloš I.
name: Rychlewska, Urszula
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Virology
subject: Computational Biology

description: A chloride salt of the tetrameric gold(III) complex with the L-valyl-L-histidine dipeptide (L-Val-L-His), [Au(L-Val-L-His)]4Cl2·14.5H2O, was obtained from the mononuclear [Au(L-Val-L-His)Cl]Cl·2H2O species at pH 7.00 in aqueous solution at room temperature. The tetrameric gold(III) complex was characterized by 1H NMR and IR spectroscopic techniques, while its structure was determined by single-crystal X-ray diffraction analysis. In the title compound, each gold(III) ion is coordinated by three nitrogen atoms, as in the corresponding mononuclear gold(III) complex (amine NA, deprotonated amide NP, and N3 imidazole nitrogen atoms), and in addition by the N1 nitrogen of the deprotonated imidazole ring from the second mononuclear gold(III) unit, which acts as a bridging ligand between two gold(III) ions. The chloride anions, by being involved in Au∙∙∙Cl∙∙∙Au interactions, help to bridge the neighboring gold(III) centers both inside and outside the tetramer.
A Study of the S=1/2 Alternating Chain using Multiprecision Methods
Creators: name: Barnes, T.
name: Riera, J.
name: Tennant, D. A.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper we present results for the ground state and low-lying excitations of the $S=1/2$ alternating Heisenberg antiferromagnetic chain. Our more conventional techniques include perturbation theory about the dimer limit and numerical diagonalization of systems of up to 28 spins. A novel application of multiple precision numerical diagonalization allows us to determine analytical perturbation series to high order; the results found using this approach include ninth-order perturbation series for the ground state energy and one magnon gap, which were previously known only to third order. We also give the fifth-order dispersion relation and third-order exclusive neutron scattering structure factor for one-magnon modes and numerical and analytical binding energies of S=0 and S=1 two-magnon bound states.
description: 16 pages, 9 figures. for submission to Phys.Rev.B. PICT files of figs available at http://csep2.phy.ornl.gov/theory_group/people/barnes/barnes.html
Figure s2: HIFU therapy system setup. from Maternal and fetal cardiometabolic recovery following ultrasound-guided high-intensity focused ultrasound placental vascular occlusion
Creators: name: Shaw, Caroline J.
name: Rivens, Ian
name: Civale, John
name: Botting, Kimberley J.
name: Allison, Beth J.
name: Brain, Kirsty L.
name: Y. Niu
name: Haar, Gail Ter
name: Giussani, Dino A.
name: Lees, Christoph C.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Biological Engineering
subject: 29903 Medical Physics
subject: FOS: Physical sciences

description: Top left: the picture shows the mechanical gantry arm and associated support structures in relationship to the water bag, HIFU and diagnostic ultrasound transducers. The ewe is lying supine, covered by surgical drapes (green), with maternal abdominal skin exposed only beneath the water bag. Top right: the picture shows an enlargement of the HIFU therapy transducer and the housing of the diagnostic transducer which allow integration of the two transducers, and their attachment to the mechanical gantry arm. Bottom: the diagram shows the arrangement of diagnostic and HIFU transducers in relationship to the gantry arm, the water bag, degassed water, and the maternal uterine or skin surface (not to scale).
Naked Singularities in the Charged Vaidya-deSitter Spacetime
Creators: name: Beesham, A.
name: Ghosh, S. G.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the occurrence of naked singularities in the spherically symmetric collapse of a charged null fluid in an expanding deSitter background - a piece of charged Vaidya-deSitter spacetime. The necessary conditions for the formation of a naked singularity are found. The results for the uncharged solutions can be recovered from our analysis.
description: 8 pages, latex, no figures
title: Μουσεία Σύγχρονης Τέχνης των SANAA: ανάλυση και ερμηνεία των αρχιτεκτονικών λύσεων
titleType: AlternativeTitle
title: Museums of contemporary art of SANAA: the analysis and the interpretation of the architectural solutions
Creators: name: Koutsogeorga, Georgia
Publisher: name: National Technological University of Athens
Year: 2012
Subjects: Μουσεία σύγχρονης τέχνης
Museums of contemporary art
SANAA
Kanazawa
Ιάπωνες αρχιτέκτονες
Japanese architects
Νέα Υόρκη
New York

description: 111 σ.
description: Η διάλεξη επικεντρώνεται στα δύο μουσεία σύγχρονης τέχνης του ιαπωνικού γραφείου SANAA, το ένα στην Καναζάουα και το άλλο στη Νέα Υόρκη. Αναλύει τις συνθετικές λύσεις των αρχιτεκτόνων και τις ερμηνεύει μέσα στο γενικότερο σημερινό κοινωνικοπολιτικό πλαίσιο.
description: This work is focusing on the two museums of contemporary art of the architectural firm SANAA, the one in Kanazawa city and the other in New York. It analyses their architectural solutions and it interprets them inside the current sociopolitical context.
Synthesis and catalytic activity of POCOP ruthenium(II) and iron(II) pincer complexes derived from 1,3- and 1,7-dihydroxynaphthalenes
Creators: name: Temich-Escribano, Juan Carlos
name: Roque-Ramires, Manuel Alejandro
name: Ortiz-Rojas, Samanta
name: Ryabov, Alexander D.
name: Le Lagadec, Ronan
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Ruthenium(II) and iron(II) POCOP pincer complexes have readily been obtained from ligands derived from the 1,3- and 1,7-dihydroxynaphtalene isomers. The two ruthenium(II) isomers displayed remarkable catalytic activity for the Friedländer annulation, and the reaction was tolerant to a wide array of electron-withdrawing and -donating substituted ketones. The catalytic reactions produced selectively the quinoline derivatives in conversions up to 99% at low catalysts loadings with turnover numbers close to 1000. The iron catalysts also exhibited a notable catalytic activity, albeit lower than their ruthenium counterparts. These results mark a significant advancement in developing catalytic reactions with ruthenium and iron POCOP pincer derivatives.
Figure s1: Timing and frequency of monitoring during follow-up period from Maternal and fetal cardiometabolic recovery following ultrasound-guided high-intensity focused ultrasound placental vascular occlusion
Creators: name: Shaw, Caroline J.
name: Rivens, Ian
name: Civale, John
name: Botting, Kimberley J.
name: Allison, Beth J.
name: Brain, Kirsty L.
name: Y. Niu
name: Haar, Gail Ter
name: Giussani, Dino A.
name: Lees, Christoph C.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Biological Engineering
subject: 29903 Medical Physics
subject: FOS: Physical sciences

description: The schema shows the relative frequency and timing of cardiovascular monitoring, blood sampling for metabolic and endocrine analysis, sampling of the fetal heart rate for analysis of variability, and post mortem examination.
A new look at the 2D Ising model from exact partition function zeros for large lattice sizes
Creators: name: Alves, Nelson A.
name: de Felicio, J. R. Drugowich
name: Hansmann, Ulrich H. E.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A general numerical method is presented to locate the partition function zeros in the complex beta plane for large lattice sizes. We apply this method to the 2D Ising model and results are reported for square lattice sizes up tp L=64. We also propose an alternative method to evaluate corrections to scaling which relies only on the leading zeros. This method is illustrated with our data.
description: 9 pages, Latex, 3 figures. To appear in Int. J. Mod. Phys. C
A Survey of Provider Satisfaction of a New, Flexible Extended-Length Pharyngeal Airway to Relieve Upper Airway Obstruction during Deep Sedation
Creators: name: McMurray, Roxanne
name: Gordon, Leah
Publisher: name: figshare
Year: 2021
Subjects: subject: 110301 Anaesthesiology
subject: FOS: Clinical medicine
subject: 110305 Emergency Medicine
subject: 110310 Intensive Care
subject: 111099 Nursing not elsewhere classified
subject: FOS: Health sciences

description: Maintaining an open airway in a spontaneously breathing patient under deep sedation, or deep monitored anesthesia care, can be challenging especially in patients who are obese, older or have sleep apnea. Specifically, current oral airways are not long enough to displace obstruction caused by redundant pharyngeal tissue, prompting external maneuvers by anesthesia providers that can impact patient outcomes and facility operational efficiency. As procedures increase at outpatient surgical centers, there is a need for an anesthesia provider-validated airway device that can sufficiently open an obstructed airway and maintain airway patency.
 This prospective, multi-center user-experience survey evaluated anesthesia provider experience of a new airway device for adult patients with airway obstruction during deep sedation. The novel pharyngeal airway has a longer flexible tubing allowing for displacement of redundant tissue, smaller diameter to allow placement alongside an endoscopy bite block and is manufactured with softer material to allow ease of insertion and patient comfort.
 Fifty-four anesthetists at 15 hospital systems reported their experience of airway use in 86 cases. The novel airway device was 100% successful in establishing and maintaining a patent airway. Survey responses indicated that the airway was easy to place (93%), allowed for a “handsoff approach” (98%), and would improve airway management practice and patient outcomes (86%).
 This pilot study demonstrated that the novel extended airway is an effective and satisfactory method for anesthesia providers to alleviate airway obstruction during deep sedation. Additional studies will be initiated to confirm efficacy and cost-effectiveness in patient populations and clinical environments that will most benefit from the new airway device.
A model of drying shrinkage that takes into account capillarity and surface adsorption effects
Creators: name: biot-bazant, figshare admin
name: El Tabbal, Ginger
name: Dangla, Patrick
name: Vandamme, Matthieu
name: Bottoni, Marina
name: Granet, Sylvie
Publisher: name: The Biot-Bazant Conference
Year: 2021
Subjects: subject: 90503 Construction Materials
subject: FOS: Civil engineering
subject: 90506 Structural Engineering
subject: Mechanics
subject: 80110 Simulation and Modelling
subject: FOS: Computer and information sciences

description: This publication is part of the proceedings of the Biot-Bažant Conference on Engineering Mechanics and Physics of Porous Materials, which took place virtually on June 1-3, 2021. It contains a one-page abstract and the video of the talk that was given at the conference.
In pursuit of natural occurring chiral dienes {(R/S)-carvone} as bidentate ligands for coordination to rhodium(I)
Creators: name: Bezuidenhout, Zaskia
name: Roodt, Andreas
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Virology
subject: Computational Biology

description: Bis-rhodium-mu-chlorido dinuclear complexes with natural occurring limonene-type enantiomeric diene nucleophiles, (S)- and (R)-carvone [SCar and RCar], are presented and their single crystal structures reported. Utilizing the diolefinic bonds of the carvones, mu-[RhI(SCar)Cl]2 (IA/B) and mu-[RhI(RCar)Cl]2 (IIA/B) were obtained in ca. 80% yields in clean reactions with reactant RhCl3(H2O)x. The “structured” chiral nanomaterials (IA/B and IIA/B > 1.1 nm) crystallize as two independent, dinuclear chiral molecules Syn-mu-[RhI(SCar)Cl]2 (IA), Anti-mu-[RhI(SCar)Cl]2 (IB), and Syn-mu-[RhI(RCar)Cl]2 (IIA, Anti-mu-[RhI(RCar)Cl]2 (IIB), respectively (based on the relative orientation of the carvone ring, oxo and methyl groups). Principal differences between the IA/IIA vs IB/IIB complexes in the solid state include the relative orientation of the two carvones, inducing a significant distortion in the µ2-Rh2Cl2 core, with the dihedral angles of 49.7(1)°/49.73(6)° in IA/IIA (Syn-mu geometry), versus 23.8(1)°/24.00(6)° in IB/IIB (Anti-mu geometry), respectively. The presence of the two structurally independent complexes in the solid state is also inferred from 1H NMR spectra. Exploiting the diolefinic bonds of (R/S)-carvone in the reaction with RhCl3(H2O)x enabled the high-yield synthesis and SCXRD of the “structured” dinuclear enantiomeric nanomaterials Syn-mu-[RhI(RCar)Cl]2 (IIA) and Anti-mu-[RhI(RCar)Cl]2 (IIB).
Copper(II) complexes of hindered diazines: methylquinoxalines
Creators: name: Landee, Christopher P.
name: Turnbull, Mark M.
name: Dickie, Diane A.
name: Twamley, Brendan
name: Wikaira, Jan L.
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health
subject: Plant Biology

description: Five new copper(II) complexes of substituted quinoxaline ligands have been prepared and characterized via single crystal X-ray diffraction, including [Cu(5-Mequinox)2(NO3)2] (2), [Cu(5-Mequinox)(NO3)(H2O)(μ-1,3-NO3)]n (3), the chloride salt (5-MequinoxH)2[Cu3Cl8] (4), the complex [Cu(6-Mequinox)2(NO3)2] (5) and [(2-carboxylato-3-methylquinox)(2-hydroxymethyl-3-methylquinox)nitratocopper(II)]. CH3CN (6) [quinox = quinoxaline; 5-Mequinox = 5-methylquinoxaline; 6-Mequinox = 6-methylquinoxaline]. None of the complexes produced diazine bridged chain structures (as seen in [(quinox)Cu(NO3)2]n (1)), although 3 forms chains via a bridging nitrate ion. Crystal packing is controlled primarily through hydrogen bonding and π-stacking of nitrate ions. The temperature dependent magnetic susceptibility data of the parent compound [(quinox)Cu(NO3)2]n are also reported and discussed.
title: Functionalization of Supramolecular Assemblies of Polyaromatic Oligophosphates and Energy Transfer in DNA-assembled Oligochromophores
Creators: name: Bürki, Nutcha
Publisher: name: Universität Bern
Year: 2021
Subjects: subject: 540 Chemistry

description: In the beginning of this thesis, a general introduction is given to explain the main aspects of supramolecular polymers, the structure of the DNA and the advantages of combining the two into supramolecular assemblies and in the last part of the introduction, the light-harvesting systems will be discussed.

Thereafter the experimental work of this thesis will be presented and can be separated into two main parts: In the first part, the formation and investigation of functionalized supramolecular assemblies of polyaromatic oligophosphates will be shown. In the second part, the energy transfer in DNA-assembled oligochromophores will be presented and discussed.

The first main part consists of three projects with the same goal: the functionalization of supramolecular polymers of polyaromatic oligophosphates. In one of the project, the formation and investigation of DNA-modified vesicles will be discussed. In the last chapter of this part, an extension of previous studies of the group Häner will be shown, which is the incorporation of a photocleaver into a pyrene DNA-conjugate and the formation of DNA-modified fibres.
Weak Shock Propagation with Accretion. II. Stability of Self-similar Solutions to Radial Perturbations
Creators: name: Coughlin, Eric R.
name: Ro, Stephen
name: Quataert, Eliot
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Coughlin et al. (2018) (Paper I) derived and analyzed a new regime of self-similarity that describes weak shocks (Mach number of order unity) in the gravitational field of a point mass. These solutions are relevant to low energy explosions, including failed supernovae. In this paper, we develop a formalism for analyzing the stability of shocks to radial perturbations, and we demonstrate that the self-similar solutions of Paper I are extremely weakly unstable to such radial perturbations. Specifically, we show that perturbations to the shock velocity and post-shock fluid quantities (the velocity, density, and pressure) grow with time as $t^α$, where $α\le 0.12$, implying that the ten-folding timescale of such perturbations is roughly ten orders of magnitude in time. We confirm these predictions by performing high-resolution, time-dependent numerical simulations. Using the same formalism, we also show that the Sedov-Taylor blastwave is trivially stable to radial perturbations provided that the self-similar, Sedov-Taylor solutions extend to the origin, and we derive simple expressions for the perturbations to the post-shock velocity, density, and pressure. Finally, we show that there is a third, self-similar solution (in addition to the the solutions in Paper I and the Sedov-Taylor solution) to the fluid equations that describes a rarefaction wave, i.e., an outward-propagating sound wave of infinitesimal amplitude. We interpret the stability of shock propagation in light of these three distinct self-similar solutions.
description: ApJ Submitted
Quantum wires from coupled InAs/GaAs strained quantum dots
Creators: name: Pryor, Craig
Publisher: name: arXiv
Year: 1998
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic structure of an infinite 1D array of vertically coupled InAs/GaAs strained quantum dots is calculated using an eight-band strain-dependent k-dot-p Hamiltonian. The coupled dots form a unique quantum wire structure in which the miniband widths and effective masses are controlled by the distance between the islands, d. The miniband structure is calculated as a function of d, and it is shown that for d>4 nm the miniband is narrower than the optical phonon energy, while the gap between the first and second minibands is greater than the optical phonon energy. This leads to decreased optical phonon scattering, providing improved quantum wire behavior at high temperatures. These miniband properties are also ideal for Bloch oscillation.
description: 5 pages revtex, epsf, 8 postscript figures
Characterizing circumgalactic gas around massive ellipticals at z~0.4 III. The galactic environment of a chemically-pristine Lyman limit absorber
Creators: name: Chen, Hsiao-Wen
name: Johnson, Sean D.
name: Straka, Lorrie A.
name: Zahedy, Fakhri S.
name: Schaye, Joop
name: Muzahid, Sowgat
name: Bouche, Nicolas
name: Cantalupo, Sebastiano
name: Marino, Raffaella Anna
name: Wendt, Martin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper presents a study of the galactic environment of a chemically-pristine (<0.6% solar metallicity) Lyman Limit system (LLS) discovered along the sightline toward QSO SDSSJ135726.27+043541.4 (zQSO=1.233) at projected distance d=126 physical kpc (pkpc) from a luminous red galaxy (LRG) at z=0.33. Combining deep Hubble Space Telescope images, MUSE integral field spectroscopic data, and wide-field redshift survey data has enabled an unprecedented, ultra-deep view of the environment around this LRG-LLS pair. A total of 12 galaxies, including the LRG, are found at d
description: 13 pages, 4 figures, published in MNRAS
Consistent canonical quantization of general relativity in the space of Vassiliev knot invariants
Creators: name: Di Bartolo, C.
name: Gambini, R.
name: Griego, J.
name: Pullin, J.
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a quantization of the Hamiltonian and diffeomorphism constraint of canonical quantum gravity in the spin network representation. The novelty consists in considering a space of wavefunctions based on the Vassiliev knot invariants. The constraints are finite, well defined, and reproduce at the level of quantum commutators the Poisson algebra of constraints of the classical theory. A similar construction can be carried out in 2+1 dimensions leading to the correct quantum theory.
description: 4 pages, RevTex, one figure
Tetrameric gold(III) complexes with L-histidine-containing dipeptides: crystal structure of the highly hydrated chloride salt of [Au(L-Val-L-His)]4 2+ tetramer
Creators: name: Ašanin, Darko P.
name: Warżajtis, Beata
name: Andrejević, Tina P.
name: Savić, Nada D.
name: Glišić, Biljana Đ.
name: Djuran, Miloš I.
name: Rychlewska, Urszula
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Virology
subject: Computational Biology

description: A chloride salt of the tetrameric gold(III) complex with the L-valyl-L-histidine dipeptide (L-Val-L-His), [Au(L-Val-L-His)]4Cl2·14.5H2O, was obtained from the mononuclear [Au(L-Val-L-His)Cl]Cl·2H2O species at pH 7.00 in aqueous solution at room temperature. The tetrameric gold(III) complex was characterized by 1H NMR and IR spectroscopic techniques, while its structure was determined by single-crystal X-ray diffraction analysis. In the title compound, each gold(III) ion is coordinated by three nitrogen atoms, as in the corresponding mononuclear gold(III) complex (amine NA, deprotonated amide NP, and N3 imidazole nitrogen atoms), and in addition by the N1 nitrogen of the deprotonated imidazole ring from the second mononuclear gold(III) unit, which acts as a bridging ligand between two gold(III) ions. The chloride anions, by being involved in Au∙∙∙Cl∙∙∙Au interactions, help to bridge the neighboring gold(III) centers both inside and outside the tetramer.
Luminescent tetranuclear zinc complexes constructed from a tetradentate Schiff-base ligand derived from 2,3-dihydroxybenzaldehyde
Creators: name: Eftemie, Diana-Ioana
name: Mocanu, Teodora
name: Tablet, Cristina
name: Raduca, Mihai
name: Dragancea, Diana
name: Andruh, Marius
Publisher: name: Taylor & Francis
Year: 2025
Subjects: Biophysics
Biochemistry
Space Science
Physical Sciences not elsewhere classified
Cell Biology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Marine Biology

description: Four compounds, [Zn4L2(HL)2](ClO4)2‧2H2O 1, [Zn4L2(HL)2](NO3)2‧2H2O 2, [Zn4L2(CH3COO)4]‧2H2O 3, and [Zn4L2(C(CH3)3COO)4] 4, have been obtained using a Schiff-base proligand, H2L, which was obtained from the condensation of 2,3-dihydroxybenzaldehyde with 2-(aminoethyl)pyridine. Their crystal structures have been solved by single-crystal X-ray diffraction. Compounds 1 and 2 feature {Zn4O6} cores with alternate mono- and bis-phenoxido bridges. Compounds 3 and 4 are constructed from L2- and carboxylato ligands, resulting in neutral linear tetranuclear species. TD-DFT calculations have been carried out to rationalize the electronic spectra of our complexes. The experimental luminescence spectra of the four complexes have been investigated in DMF solutions.
In pursuit of natural occurring chiral dienes {(R/S)-carvone} as bidentate ligands for coordination to rhodium(I)
Creators: name: Bezuidenhoudt, Zaskia
name: Roodt, Andreas
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Virology
subject: Computational Biology

description: Bis-rhodium-mu-chlorido dinuclear complexes with natural occurring limonene-type enantiomeric diene nucleophiles, (S)- and (R)-carvone [SCar and RCar], are presented and their single crystal structures reported. Utilizing the diolefinic bonds of the carvones, mu-[RhI(SCar)Cl]2 (IA/B) and mu-[RhI(RCar)Cl]2 (IIA/B) were obtained in ca. 80% yields in clean reactions with reactant RhCl3(H2O)x. The “structured” chiral nanomaterials (IA/B and IIA/B > 1.1 nm) crystallize as two independent, dinuclear chiral molecules Syn-mu-[RhI(SCar)Cl]2 (IA), Anti-mu-[RhI(SCar)Cl]2 (IB), and Syn-mu-[RhI(RCar)Cl]2 (IIA, Anti-mu-[RhI(RCar)Cl]2 (IIB), respectively (based on the relative orientation of the carvone ring, oxo and methyl groups). Principal differences between the IA/IIA vs IB/IIB complexes in the solid state include the relative orientation of the two carvones, inducing a significant distortion in the µ2-Rh2Cl2 core, with the dihedral angles of 49.7(1)°/49.73(6)° in IA/IIA (Syn-mu geometry), versus 23.8(1)°/24.00(6)° in IB/IIB (Anti-mu geometry), respectively. The presence of the two structurally independent complexes in the solid state is also inferred from 1H NMR spectra. Exploiting the diolefinic bonds of (R/S)-carvone in the reaction with RhCl3(H2O)x enabled the high-yield synthesis and SCXRD of the “structured” dinuclear enantiomeric nanomaterials Syn-mu-[RhI(RCar)Cl]2 (IIA) and Anti-mu-[RhI(RCar)Cl]2 (IIB).
Asthma control test reflects not only lung function but also airway inflammation in children with stable asthma
Creators: name: Lee, Woo Yeon
name: Suh, Dong In
name: Song, Dae Jin
name: Hey-Sung Baek
name: Meeyong Shin
name: Yoo, Young
name: Kwon, Ji-Won
name: Jang, Gwang Cheon
name: Hyeon-Jong Yang
name: Lee, Eun
name: Ju-Hee Seo
name: Woo, Sung-Il
name: Kim, Hyung Young
name: Shin, Youn Ho
name: Lee, Ju Suk
name: Jisun Yoon
name: Sungsu Jung
name: Minkyu Han
name: Eunjin Eom
name: Jinho Yu
name: Kim, Woo Kyung
name: Lim, Dae Hyun
name: Kim, Jin Tack
name: Woo-Sung Chang
name: Jeom-Kyu Lee
name: Kim, Hwan Soo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Objective: Various numerical asthma control tools have been developed to distinguish different levels of symptom control. We aimed to examine whether the asthma control test (ACT) is reflective of objective findings such as lung function, fractional exhaled nitric oxide (FeNO) and laboratory data in patients with stable asthma. Methods: We included patients who were enrolled in the Korean Childhood Asthma Study. ACT, spirometry, blood tests and FeNO were performed in patients after stabilization of their asthma. We examined differences among spirometry parameters, blood tests and FeNO according to control status as determined by ACT and investigated for any significant correlations. Results: The study population consisted of 441 subjects. Spirometry showed that forced expiratory volume in one second (FEV1), forced expiratory flow between 25% and 75% of forced vital capacity and FEV1/forced vital capacity were all significantly higher in the controlled asthma group. Likewise, FeNO and percent-change in FEV1 were both significantly lower in the controlled asthma group. In blood tests, the eosinophil fraction was significantly lower in the controlled asthma group while white blood cell count was significantly higher in the controlled asthma group. Lastly, among the various factors analyzed, only provocative concentration of methacholine causing a 20% fall in FEV1 significantly correlated with ACT score. Conclusion: ACT is useful as part of the routine evaluation of asthmatic children and should be used as a complement to existing tools such as spirometry and FeNO measurement.
Effect of 4-position pyridine ring substitution on Zn(II) complexes of 4-substituted Py2N2 pyridinophane macrocycles
Creators: name: Smith, Katherine J.
name: Schwartz, Timothy M.
name: Johnston, Hannah M.
name: Freire, David M.
name: Pota, Kristof
name: Green, Kayla N.
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Cancer

description: The metal binding properties of macrocyclic small molecules are a key property that drives the applications for which these ligands can be used. Pyridine-modified Py2N2 pyridinophane small molecules are a new class of macrocyclic small molecules, whose properties have not been explored. As a result, Zn(II) metal binding of a library of six pyridine-modified Py2N2 complexes is reported here. These results include 1H NMR, log βZn(II), and X-ray diffraction, which are compared to PyN3 congeners to show that the differences in each scaffold yield markedly different metal binding properties that can be exploited in future applications.
Gravitational conformal invariance and coupling constants in Kaluza-Klein theory
Creators: name: Darabi, F.
name: Wesson, P. S.
Publisher: name: arXiv
Year: 2000
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce a generalized gravitational conformal invariance in the context of non-compactified 5D Kaluza-Klein theory. It is done by assuming the 4D metric to be dependent on the extra non-compactified dimension. It is then shown that the conformal invariance in 5D is broken by taking an absolute cosmological scale $R_0$ over which the 4D metric is assumed to be dependent weakly on the 5th dimension. This is equivalent to Deser's model for the breakdown of the conformal invariance in 4D by taking a constant cosmological mass term $μ^2\sim R_0^{-2}$ in the theory. We set the scalar field to its background cosmological value leading to Einstein equation with the gravitational constant $G_N$ and a small cosmological constant. A dual Einstein equation is also introduced in which the matter is coupled to the higher dimensional geometry by the coupling $G_N^{-1}$. Relevant interpretations of the results are also discussed.
description: 10 pages, LaTeX, some cghanges in the text
Oriented Asymmetric Wave Propagation and Refraction Bending in Hyperbolic Media
Creators: name: Macêdo, Rair
name: Dumelow, Thomas
name: Camley, Robert E.
name: Stamps, Robert L.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Crystal quartz is a well-known anisotropic medium with optically active phonons in the THz region where hyperbolic phonon-polaritons can be excited. Here, we use this material to illustrate how the behavior of bulk and surface hyperbolic polaritons can be drastically modified by changing the orientation of the crystal's anisotropy axis with respect to its surface. We demonstrate, both theoretically and experimentally, phenomena associated with the orientation of hyperbolic media. We show the consequences of slight changes in the crystal's orientation in various ways, from the creation of hyperbolic surface phonon-polaritons to the demonstration of oriented asymmetric transmission of radiation passing through a hyperbolic medium.
description: 24 pages, 5 figures
The surface barrier in mesoscopic type I and type II superconductors
Creators: name: Hernandez, Alexander D.
name: Dominguez, Daniel
Publisher: name: arXiv
Year: 2001
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the surface barrier for magnetic field penetration in mesoscopic samples of both type I and type II superconductors. Our results are obtained from numerical simulations of the time-dependent Ginzburg-Landau equations. We calculate the dependence of the first field for flux penetration ($H_p$) with the Ginzburg-Landau parameter ($κ$) observing an increase of $H_p$ with decreasing $κ$ for a superconductor-insulator boundary condition ($(\nabla -iA)Ψ|_n=0$) while for a superconductor-normal boundary condition (approximated by the limiting case of $Ψ|_S=0$) $H_p$ has a smaller value independent of $κ$ and proportional to $H_c$. We study the magnetization curves and penetration fields at different sample sizes and for square and thin film geometries. For small mesoscopic samples we study the peaks and discontinuous jumps found in the magnetization as a function of magnetic field. To interpret these jumps we consider that vortices located inside the sample induce a reinforcement of the surface barrier at fields greater than the first penetration field $H_{p1}$. This leads to multiple penetration fields $H_{pi} = H_{p1}, H_{p2}, H_{p3}, ...$ for vortex entrance in mesoscopic samples. We study the dependence with sample size of the penetration fields $H_{pi}$. We explain these multiple penetration fields extending the usual Bean-Livingston analysis by considering the effect of vortices inside the superconductor and the finite size of the sample.
description: 12 pages, 11 figures. Revised version. Section III rewritten. Some figures changed
Regulating a sql layered coordination polymer into a rare fsc open framework with naphthalenedisulphonic acid pillar for C2H2/CO2 separation
Creators: name: Wan, Jingmeng
name: Feng, Yanfei
name: Duan, Jingui
name: Bai, Junfeng
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Biophysics
Space Science
Physical Sciences not elsewhere classified
Medicine
Neuroscience
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: The removal of carbon dioxide (CO2) from acetylene (C2H2) represents a pivotal industrial process for the production of high-purity C2H2. Nevertheless, the separation of C2H2 and CO2 is challenging due to their highly similar molecular sizes and physical properties. In this work, we report a fine regulation of a sql layered coordination polymer (termed NTU-107) into a rare fsc open framework (termed NTU-108) with naphthalenedisulphonic acid pillar for selective C2H2 capture from CO2-contained mixtures. NTU-107 was prepared by the reaction of 4-(1H-imidazol-1-yl)benzoic acid (L1) ligand and Cu2+ ion, showing a layered framework with a pore size of 4.2 Å. After inserting 1,5-naphthalenedisulphonic acid between the layers, a new pillar-layered open framework (5.8 Å) with sulphonic acid functional sites was prepared. Single-component gas adsorption experiments and breakthrough experiments demonstrated that NTU-108 with accessible sulphonic acid sites exhibits a high C2H2 absorption capacity and dynamic C2H2/CO2 separation performance at room temperature.
Semiclassical theory of magnetotransport through a chaotic quantum well
Creators: name: Narimanov, E. E.
name: Stone, A. Douglas
name: Boebinger, G. S.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a quantitative semiclassical formula for the resonant tunneling current through a quantum well in a tilted magnetic field. It is shown that the current depends only on periodic orbits within the quantum well. The theory explains the puzzling evolution of the tunneling spectra near a tilt angle of $30^{\circ}$ as arising from an exchange bifurcation of the relevant periodic orbits.
description: 4 pages, RevTeX, epsf, 2 PostScript Figures (1 with color)
Maternal intake of caffeinated products and birth defects: a systematic review and meta-analysis of observational studies
Creators: name: Yue, Yan
name: Li, Wenxing
name: Tang, Jun
name: Zeng, Yan
name: Xiong, Tao
name: Qiu, Xia
name: Shi, Jing
name: Wang, Hua
name: Xia, Bin
name: Luo, Lili
name: Qu, Yi
name: Mu, Dezhi
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Caffeinated products are frequently consumed by women of childbearing age worldwide. It still unclear that whether maternal intake of caffeine associated with an increased risk of birth defects. We searched the databases of PubMed, Embase, the Cochrane Library, and Web of Science for eligible studies through July 2020. All studies examining the association between maternal consumption of caffeine or caffeinated products and birth defects were included. Twenty-nine studies were included in this meta-analysis. Among all the birth defects, maternal caffeine consumption was associated with a higher risk of cardiovascular defects, [odds ratio (OR) 1.17; 95% confidence interval (CI), 1.07–1.28], craniofacial defects (OR 1.09; 95% CI, 1.02–1.17), alimentary tract defects (OR 1.35; 95% CI, 1.16–1.56), and abdominal-wall defects and hernia (OR 1.13; 95% CI, 1.03–1.25). No association was found between maternal caffeine intake and musculoskeletal system defects, genitourinary system defects, nervous system defects, or chromosomal abnormalities. Meanwhile, all three of the caffeine consumption categories (low, moderate, and high) were associated with a higher risk of cardiovascular defects and alimentary tract defects.
Global monopole as dual-vacuum solution in Kaluza-Klein spacetime
Creators: name: Dadhich, Naresh
name: Patel, L. K.
name: Tikekar, R.
Publisher: name: arXiv
Year: 1999
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By application of the duality transformation, which implies interchange of active and passive electric parts of the Riemann curvature (equivalent to interchange of Ricci and Einstein tensors) it is shown that the global monopole solution in the Kaluza-Klein spacetime is dual to the corresponding vacuum solution. Further we also obtain solution dual to flat space which would in general describe a massive global monopole in 4-dimensional Euclidean space and would have massless limit analogus to the 4-dimensional dual-flat solution.
description: 8 pages, LaTEX version
Classical Representation of the 1D Anderson Model
Creators: name: Izrailev, F. M.
name: Ruffo, S.
name: Tessieri, L.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: A new approach is applied to the 1D Anderson model by making use of a two-dimensional Hamiltonian map. For a weak disorder this approach allows for a simple derivation of correct expressions for the localization length both at the center and at the edge of the energy band, where standard perturbation theory fails. Approximate analytical expressions for strong disorder are also obtained.
description: 10 pages in LaTex