cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Gauging the strength of the molecular halogen bond via experimental electron density and spectroscopy
title: Dedicated to Professor Klaus Jurkschat on the occasion of his 70th birthday.
titleType: AlternativeTitle
Creators: name: Otte, Felix
name: Kleinheider, Johannes
name: Grabe, Bastian
name: Hiller, Wolf
name: Busse, Franziska
name: Wang, Ruimin
name: Kreienborg, Nora M.
name: Merten, Christian
name: Englert, Ulli
name: Strohmann, Carsten
Publisher: name: TU Dortmund
Year: 2023
Subjects: subject: Diffraction
subject: Electron density
subject: Energy density
subject: Group 17 compounds
subject: Molecules
subject: 540

description: Strong and weak halogen bonds (XBs) in discrete aggregates involving the same acceptor are addressed by experiments in solution and in the solid state. Unsubstituted and perfluorinated iodobenzenes act as halogen donors of tunable strength; in all cases, quinuclidine represents the acceptor. NMR titrations reliably identify the strong intermolecular interactions in solution, with experimental binding energies of approx. 7 kJ/mol. Interaction of the σ hole at the halogen donor iodine leads to a redshift in the symmetric C–I stretching vibration; this shift reflects the interaction energy in the halogen-bonded adducts and may be assessed by Raman spectroscopy in condensed phase even for weak XBs. An experimental picture of the electronic density for the XBs is achieved by high-resolution X-ray diffraction on suitable crystals. Quantum theory of atoms in molecules (QTAIM) analysis affords the electron densities and energy densities in the bond critical points of the halogen bonds and confirms stronger interaction for the shorter contacts. For the first time, the experimental electron density shows a significant effect on the atomic volumes and Bader charges of the quinuclidine N atoms, the halogen-bond acceptor: strong and weak XBs are reflected in the nature of their acceptor atom. Our experimental findings at the acceptor atom match the discussed effects of halogen bonding and thus the proposed concepts in XB activated organocatalysis.
description: ACS omega;8(24)
Pigmy resonances, transfer, and separable potentials
Creators: name: Bertulani, C. A.
name: Kadyrov, A. S.
name: Kruppa, A.
name: Hao, T. V. Nhan
name: Mukhamedzhanov, A. M.
name: Shubhchintak
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this contribution we make a short review of recent progress on topics of current interest in nuclear physics and nuclear astrophysics. In particular, we discuss a re-analysis of the extraction of the dipole response of the pigmy resonance in $^{68}$Ni based on a continuum discretized coupled-channels calculation in relativistic Coulomb excitation experiments. We also discuss the forthcoming progresses made by our group on the Alt-Sandhas-Grassberber approach to (d,p) reactions and future expectations. The role of separable potentials in solving such equations with a test case based on applications of such potentials to phase-shift analysis is also presented.
description: Carpathian Summer School of Physics 2016,Exotic Nuclei and Nuclear/Particle Physics VI, "Physics with small accelerators", eds. L. Trache et al. 9 pages, 6 figures
Crystal field states of Kondo lattice heavy fermions CeRuSn3 and CeRhSn3
Creators: name: Anand, V. K.
name: Adroja, D. T.
name: Britz, D.
name: Strydom, A. M.
name: Taylor, J. W.
name: Kockelmann, W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Inelastic neutron scattering experiments have been carried out to determine the crystal field states of the Kondo lattice heavy fermions CeRuSn3 and CeRhSn3. Both the compounds crystallize in LaRuSn3-type cubic structure (space group Pm-3n) in which the Ce atoms occupy two distinct crystallographic sites with cubic (m-3) and tetragonal (-4m.2) point symmetries. The INS data of CeRuSn3 reveal the presence of a broad excitation centered around 6-8 meV which is accounted by a model based on crystal electric field (CEF) excitations. On the other hand, the INS data of isostructural CeRhSn3 reveal three CEF excitations around 7.0, 12.2 and 37.2 meV. The neutron intensity sum rule indicates that the Ce ions at both cubic and tetragonal Ce sites are in Ce3+ state in both CeRuSn3 and CeRhSn3. The CEF level schemes for both the compounds are deduced. We estimate the Kondo temperature T_K = 3.1(2) K for CeRuSn3 from neutron quasielastic linewidth in excellent agreement with that determined from the scaling of magnetoresistance which gives T_K = 3.2(1) K. For CeRhSn3 the neutron quasielastic linewidth gives T_K = 4.6 K. For both CeRuSn3 and CeRhSn3, the ground state of Ce3+ turns out to be a quartet for the cubic site and a doublet for the tetragonal site.
description: 12 pages, 13 figures, 2 tables, to appear in Phys. Rev. B
The Void Galaxy Survey: Photometry, structure and identity of void galaxies
Creators: name: Beygu, B.
name: Peletier, R. F.
name: van der Hulst, J. M.
name: Jarrett, T. H
name: Kreckel, K.
name: van de Weygaert, R.
name: van Gorkom, J. H.
name: Aragon-Calvo, M. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We analyze photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6$μ$m and 4.5$μ$m Spitzer photometry. The VGS galaxies constitute a sample of void galaxies that were selected by a geometric-topological procedure from the SDSS DR7 data release, and which populate the deep interior of voids. Our void galaxies span a range of absolute B-magnitude from $\rm{M_B=-15.5}$ to $\rm{M_B=-20}$, while at the 3.6$μ$m band their magnitudes range from $\rm{M_{3.6}=-18}$ to $\rm{M_{3.6}=-24}$. Their B-[3.6] colour and structural parameters indicate these are star forming galaxies. A good reflection of the old stellar population, the near-infrared band photometry also provide a robust estimate of the stellar mass, which for the VGS galaxies we confirm to be smaller than $3 \times 10^{10}$ M$_\odot$. In terms of the structural parameters and morphology, our findings align with other studies in that our VGS galaxy sample consists mostly of small late-type galaxies. Most of them are similar to Sd-Sm galaxies, although a few are irregularly shaped galaxies. The sample even includes two early-type galaxies, one of which is an AGN. Their Sérsic indices are nearly all smaller than $n=2$ in both bands and they also have small half-light radii. In all, we conclude that the principal impact of the void environment on the galaxies populating them mostly concerns their low stellar mass and small size.
description: Accepted for publication in MNRAS, 16 pages, 11 figures
Resolving the Geometry of the Innermost Relativistic Jets in Active Galactic Nuclei
Creators: name: Algaba, Juan-Carlos
name: Nakamura, Masanori
name: Asada, Keiichi
name: Lee, Sang-Sung
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the current paradigm, it is believed that the compact VLBI radio core of radio-loud AGNs represents the innermost upstream regions of relativistic outflows. These regions of AGN jets have generally been modeled by a conical outflow with roughly constant opening angle and flow speed. Nonetheless, some works suggest that a parabolic geometry would be more appropriate to fit the high energy spectral energy distribution properties and it has been recently found that, at least in some nearby radio-galaxies, the geometry of the innermost regions of the jet is parabolic. We compile here multi-frequency core sizes of archival data to investigate the typically unresolved upstream regions of the jet geometry of a sample of 56 radio-loud AGNs. Data combined from the sources considered here is not consistent with the classic picture of a conical jet starting in the vicinity of the super-massive black hole (SMBH), and may exclude a pure parabolic outflow solution, but rather suggest an intermediate solution with quasi-parabolic streams, which are frequently seen in numerical simulations. Inspection of the large opening angles near the SMBH and the range of the Lorentz factors derived from our results support our analyses. Our result suggests that the conical jet paradigm in AGNs needs to be re-examined by mm/sub-mm VLBI observations.
description: 12 pages, 5 figures, accepted for publication in ApJ
Leptonycteris nivalis
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Leptonycteris
Leptonycteris nivalis

description: Leptonycteris nivalis (Saussure, 1860). Rev. Mag. Zool. Paris, ser. 2, 12:492. REVIEWED BY: B. Villa-Ramirez (BVR). TYPE LOCALITY: Mexico, Veracruz, Mt. Orizaba. DISTRIBUTION: S.E. Arizona and W. Texas (U.S.A.) to S. Guatemala. COMMENT: Includes yerbabuenae; see Watkins, et al., 1972, Spec. Publ. Mus. Texas Tech Univ., 1: 16. ISIS NUMBER: 5301405008035002001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 157, DOI: 10.5281/zenodo.7352990
Anomalous Postselection in the Hensen et al. Bell Test
Creators: name: Graft, Donald A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is shown that the data of the Hensen et al. Bell test experiment exhibits anomalous postselection that can fully account for the apparent violation of the CHSH inequality. A simulation of a local realist model implementing similar postselection is presented. The model produces an apparent violation of CHSH indistinguishable from that of the experiment. The experimental data also appears to violate no-signaling, and it is shown how postselection can produce an artifactual violation of no-signaling. The Hensen et al. experiment does not succeed in rejecting classical locality and therefore does not confirm quantum nonlocality.
Generative Steganography Network
Creators: name: Wei, Ping
name: Li, Sheng
name: Zhang, Xinpeng
name: Luo, Ge
name: Qian, Zhenxing
name: Zhou, Qing
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Steganography usually modifies cover media to embed secret data. A new steganographic approach called generative steganography (GS) has emerged recently, in which stego images (images containing secret data) are generated from secret data directly without cover media. However, existing GS schemes are often criticized for their poor performances. In this paper, we propose an advanced generative steganography network (GSN) that can generate realistic stego images without using cover images. We firstly introduce the mutual information mechanism in GS, which helps to achieve high secret extraction accuracy. Our model contains four sub-networks, i.e., an image generator ($G$), a discriminator ($D$), a steganalyzer ($S$), and a data extractor ($E$). $D$ and $S$ act as two adversarial discriminators to ensure the visual quality and security of generated stego images. $E$ is to extract the hidden secret from generated stego images. The generator $G$ is flexibly constructed to synthesize either cover or stego images with different inputs. It facilitates covert communication by concealing the function of generating stego images in a normal generator. A module named secret block is designed to hide secret data in the feature maps during image generation, with which high hiding capacity and image fidelity are achieved. In addition, a novel hierarchical gradient decay (HGD) skill is developed to resist steganalysis detection. Experiments demonstrate the superiority of our work over existing methods.
The Bok Globule BHR 160: structure and star formation
Creators: name: Haikala, Lauri K
name: Reipurth, Bo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: BHR 160 is a virtually unstudied cometary globule within the Sco OB4 association in Scorpius at a distance of 1600pc. It is part of a system of cometary clouds which face the luminous O star HD155806. BHR 160 is special because it has an intense bright rim. We attempt to derive physical parameters for BHR 160 and to understand its structure and the origin of its peculiar bright rim. BHR 160 was mapped in the $^{12}$CO, $^{13}$CO and C$^{18}$O (2-1) and (1-0) and CS (3-2) and (2-1) lines. These data, augmented with stellar photometry derived from the ESO VVV survey, were used to derive the mass and distribution of molecular material in BHR 160 and its surroundings. Archival mid-infrared data from the WISE satellite was used to find IR excess stars in the globule and its neighbourhood. An elongated 1' by 0.6' core lies adjacent to the globule bright rim. $^{12}$CO emission covers the whole globule, but the $^{13}$CO, C$^{18}$O and CS emission is more concentrated to the core. The $^{12}$CO line profiles indicate the presence of outflowing material near the core, but the spatial resolution of the mm data is not sufficient for a detailed spatial analysis. The BHR 160 mass estimated from the C$^{18}$O mapping is 100$\pm$50Msun(d/1.6kpc)$^2$ where d is the distance to the globule. Approximately 70 percent of the mass lies in the dense core. The total mass of molecular gas in the direction of BHR 160 is 210$\pm$(d/1.6kpc)$^2$ Msun when estimated from the more extended VVV NIR photometry. We argue that the bright rim of BHR 160 is produced by a close-by early B-type star, HD 319648, that was likely recently born in the globule. This star is likely to have triggered the formation of a source, IRS 1, that is embedded within the core of the globule and detected only in Ks and by WISE and IRAS.
description: 19 pages, 24 figures, Accepted for publication in Astronomy and Astrophysics
Leptonycteris sanborni Hoffmeister 1957
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Leptonycteris
Leptonycteris sanborni

description: Leptonycteris sanborni Hoffmeister, 1957. J. Mammal., 38:456. REVIEWED BY: B. Villa-Ramirez (BVR). TYPE LOCALITY: U.S.A., Arizona, Cochise Co., 10 mi. (16 km) S.S.E. Ft. Huachuca, mouth of Miller canyon. DISTRIBUTION: S. Arizona and New Mexico (U.S.A.) to El Salvador. COMMENT: L. yerbabuenae may be the correct name for this species; see Ramirez-Pulido and Alvarez, 1972, Southwest. Nat., 16:249-259; but also see Watkins, et al., 1972, Spec. Publ. Mus. Texas Tech Univ., 1:16. ISIS NUMBER: 5301405008035003001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 157, DOI: 10.5281/zenodo.7352990
An acoustical analysis of rhythmicity in infant babbling
Creators: name: Dolata, Jill Kalat
Publisher: name: The University of Texas at Austin
Year: 2005
Subjects: Rhythmicity
Infant babbling

description: As a precursor to spoken language, rhythmicity in prelinguistic vocalizations can provide information on the initial characteristics of the vocal output system at the onset of first speech-like syllable use. The present study was designed to establish the temporal characteristics of syllable rhythmicity. Four typically developing infants were observed longitudinally, and acoustic analysis was made of canonical syllables to determine nonfinal syllable duration and variability. The present study also analyzed syllable duration in four English-speaking adults. Within-utterance variability of infant syllable durations was lower than across-utterance variability, indicating that though the infants produced a wide range of syllable durations, they tended to retain durational consistency within syllable strings. Infant syllable durations were longer and more variable than adult durations. The results from the present study were discussed in the context of the development of the motor system and were concurrent with the view that rhythmic behaviors in infancy represent a stage during the transition towards voluntary coordinated motor movements
The Reasonable Effectiveness of Agent-Based Simulations in Evolutionary Game Theory
Creators: name: Adami, Christoph
name: Schossau, Jory
name: Hintze, Arend
Publisher: name: arXiv
Year: 2016
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Computer Science and Game Theory (cs.GT)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This is a Reply to comments published in Physics of Life Reviews, on our article "Evolutionary game theory using agent-based methods" (Physics of Life Reviews, 2016, arXiv:1404.0994).
description: 5 pages. To appear in Physics of Life Reviews
A dual skew symmetry for transient reflected Brownian motion in an orthant
Creators: name: Franceschi, Sandro
name: Raschel, Kilian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We introduce a transient reflected Brownian motion in a multidimensional orthant, which is either absorbed at the apex of the cone or escapes to infinity. We address the question of computing the absorption probability, as a function of the starting point of the process. We provide a necessary and sufficient condition for the absorption probability to admit an exponential product form, namely, that the determinant of the reflection matrix is zero. We call this condition a dual skew symmetry. It recalls the famous skew symmetry introduced by Harrison, which characterizes the exponential stationary distributions in the recurrent case. The duality comes from that the partial differential equation satisfied by the absorption probability is dual to the one associated with the stationary distribution in the recurrent case.
description: 14 pages
Grant-free Rateless Multiple Access: A Novel Massive Access Scheme for Internet of Things
Creators: name: Zhang, Zhaoyang
name: Wang, Xianbin
name: Zhang, Yu
name: Chen, Yan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Rateless Multiple Access (RMA) is a novel non-orthogonal multiple access framework that is promising for massive access in Internet of Things (IoT) due to its high efficiency and low complexity. In the framework, after certain \emph{registration}, each active user respectively transmits to the access point (AP) randomly based on an assigned random access control function (RACf) until receiving an acknowledgement (ACK). In this work, by exploiting the intrinsic access pattern of each user, we propose a grant-free RMA scheme, which no longer needs the registration process as in the original RMA, thus greatly reduces the signalling overhead and system latency. Furthermore, we propose a low-complexity joint iterative detection and decoding algorithm in which the channel estimation, active user detection, and information decoding are done simultaneously. Finally, we propose a method based on density evolution (DE) to evaluate the system performance.
description: Accepted for publication in IEEE Communications Letters
Lyman-alpha at Cosmic Dawn with the LAGER survey and the Roman Space Telescope
Creators: name: Wold, Isak
Publisher: name: Zenodo
Year: 2023
Subjects: Cosmology and Large Scale Surveys

description: Lyman-alpha (Lya) surveys are an important tool to constrain the timing and topology of reionization. Towards this end, our group is conducting a 24 square deg narrowband Lya emitter survey at z = 6.9 — The Lyman-Alpha Galaxies in the Epoch of Reionization (LAGER) project. This survey exploits DECam's uniquely large 3 square deg FOV and detector sensitivity in the near-infrared, as well as a custom-made narrowband filter at 9642 A. I will present the latest from our JWST followup of a z=6.9 Lya overdensity and LAGER’s Lya luminosity function based on four out of the eight total survey fields. We find moderate number density evolution from z = 5.7 that is consistent with a fully or largely ionized z ~ 7 intergalactic medium. Ground-based Lya surveys become highly inefficient at z>8 largely due to the increasing night sky background. The Roman Space Telescope's ability to obtain deep near-infrared spectra over a wide field of view offers the opportunity to revolutionize this redshift regime. To investigate this further, we have simulated a deep multi-position-angle Roman grism survey and tested our ability to recover z>7 Lya emitters. We show how a novel data cube search technique -- CUBGRISM - - originally developed for GALEX grism data can be applied to Roman grism data to produce a Lya flux- limited sample without the need for a continuum detection. Given our adopted reduction technique, we investigate the impact of altering the number of independent position angles and total exposure time. Our results indicate that a proposed deep Roman grism survey can achieve Lya line depths comparable to the deepest z=7 narrow-band surveys, allowing us to study the evolution of Lya populations and infer the ionization state of the intergalactic medium at cosmic dawn.
Possible coexistence of short-range resonating-valence-bond and long-range stripe correlations in the spatially anisotropic triangular-lattice quantum magnet Cu$_2$(OH)$_3$NO$_3$
Creators: name: Yuan, Long
name: Zhao, Yuqian
name: Li, Boqiang
name: Song, Yiru
name: Xia, Yuanhua
name: Liu, Benqiong
name: Wang, Junfeng
name: Li, Yuesheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that short-range resonating-valence-bond correlations and long-range order can coexist in the ground state (GS) of a frustrated spin system. Our study comprises a comprehensive investigation of the quantum magnetism on the structurally disorder-free single crystal of Cu$_2$(OH)$_3$NO$_3$, which realizes the $s$ = 1/2 Heisenberg model on a spatially anisotropic triangular lattice. Competing exchange interactions determined by fitting the magnetization measured up to 55 T give rise to an exotic GS wavefunction with coexistence of the dominant short-range resonating-valence-bond correlations and weak long-range stripe order (ordered moment $M_0$ = $|\langle s_i^z\rangle|$ $\sim$ 0.02). At low temperatures, a first-order spin-flop transition is visible at $\sim$ 1-3 T. As the applied field further increases, another two magnetic-field-induced quantum phase transitions are observed at $\sim$ 14-19 and $\sim$ 46-52 T, respectively. Simulations of the Heisenberg exchange model show semi-quantitative agreement with the magnetic-field modulation of these unconventional phases, as well as the absence of visible magnetic reflections in neutron diffraction, thus supporting the GS of the spin system of Cu$_2$(OH)$_3$NO$_3$ may be approximate to a quantum spin liquid. Our study establishes structurally disorder-free magnetic materials with spatially anisotropic exchange interactions as a possible arena for spin liquids.
description: Accepted in PRB
Lichonycteris Thomas 1895
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Lichonycteris

description: Lichonycteris Thomas, 1895. Ann. Mag. Nat. Hist., ser. 6, 16:55. REVIEWED BY: R. Barquez (RB); T. A. Griffiths (TAG); J. Molinari (JML). ISIS NUMBER: 5301405008036000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 157, DOI: 10.5281/zenodo.7352990
Proof Complexity Lower Bounds from Algebraic Circuit Complexity
Creators: name: Forbes, Michael A.
name: Shpilka, Amir
name: Tzameret, Iddo
name: Wigderson, Avi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Complexity (cs.CC)
subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We give upper and lower bounds on the power of subsystems of the Ideal Proof System (IPS), the algebraic proof system recently proposed by Grochow and Pitassi, where the circuits comprising the proof come from various restricted algebraic circuit classes. This mimics an established research direction in the boolean setting for subsystems of Extended Frege proofs, where proof-lines are circuits from restricted boolean circuit classes. Except one, all of the subsystems considered in this paper can simulate the well-studied Nullstellensatz proof system, and prior to this work there were no known lower bounds when measuring proof size by the algebraic complexity of the polynomials (except with respect to degree, or to sparsity). We give two general methods of converting certain algebraic lower bounds into proof complexity ones. Our methods require stronger notions of lower bounds, which lower bound a polynomial as well as an entire family of polynomials it defines. Our techniques are reminiscent of existing methods for converting boolean circuit lower bounds into related proof complexity results, such as feasible interpolation. We obtain the relevant types of lower bounds for a variety of classes (sparse polynomials, depth-3 powering formulas, read-once oblivious algebraic branching programs, and multilinear formulas), and infer the relevant proof complexity results. We complement our lower bounds by giving short refutations of the previously-studied subset-sum axiom using IPS subsystems, allowing us to conclude strict separations between some of these subsystems.
Fermi Level Depinning in Two-Dimensional Materials Using a Fluorinated Bilayer Graphene Barrier
Creators: name: Sun, Cunzhi
name: Xiang, Cheng
name: Hong, Rongdun
name: Zhang, Feng
name: Booth, Timothy J.
name: Bøggild, Peter
name: Doan, Manh-Ha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Strong Fermi level pinning (FLP) - often attributed to metal-induced gap states at the interfacial contacts - severely reduces the tunability of the Schottky barrier height of the junction and limits applications of the 2D materials in electronics and optoelectronics. Here, we show that fluorinated bilayer graphene (FBLG) can be used as a barrier to effectively prevent FLP at metal/2D materials interfaces. FLBG can be produced via short exposure (1-3 min) to SF6 plasma that fluorinates only the top layer of a bilayer graphene with covalent C-F bonding, while the bottom layer remains intrinsic, resulting in a band gap opening of about 75 meV. Inserting FBLG between the metallic contacts and a layer of MoS2 reduces the Schottky barrier height dramatically for the low-work function metals (313 and 260 meV for Ti and Cr, respectively) while it increases for the high-work function one ( 160 meV for Pd), corresponding to an improved pinning factor. Our results provide a straightforward method to generate atomically thin dielectrics with applications not only for depinning the Fermi level at metal/transition metal dichalcogenide (TMD) interfaces but also for solving many other problems in electronics and optoelectronics
Correlations of the density and of the current in non-equilibrium diffusive systems
Creators: name: Sadhu, Tridib
name: Derrida, Bernard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We use fluctuating hydrodynamics to analyze the dynamical properties in the non-equilibrium steady state of a diffusive system coupled with reservoirs. We derive the two-time correlations of the density and of the current in the hydrodynamic limit in terms of the diffusivity and the mobility. Within this hydrodynamic framework we discuss a generalization of the fluctuation dissipation relation in a non-equilibrium steady state where the response function is expressed in terms of the two-time correlations. We compare our results to an exact solution of the symmetric exclusion process. This exact solution also allows one to directly verify the fluctuating hydrodynamics equation.
description: 26 pages, 4 figures, Submitted to J Stat Mech
Lichonycteris degener Miller 1931
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Lichonycteris
Lichonycteris degener

description: Lichonycteris degener Miller, 1931. J. Mammal., 12:411. TYPE LOCALITY: Brazil, Para, Belem (=Para). DISTRIBUTION: Amazonian Brazil; Venezuela; Bolivia. ISIS NUMBER: 5301405008036001001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 157, DOI: 10.5281/zenodo.7352990
Topological vacuum bubble by anyon braiding
Creators: name: Han, Cheolhee
name: Park, Jinhong
name: Gefen, Yuval
name: Sim, H. -S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: According to a basic rule of fermionic and bosonic many-body physics, known as the linked cluster theorem, physical observables are not affected by vacuum bubbles, which represent virtual particles created from vacuum and self-annihilating without interacting with real particles. Here, we show that this conventional knowledge must be revised for anyons, quasiparticles that obey fractional exchange statistics intermediate between fermions and bosons. We find that a certain class of vacuum bubbles of Abelian anyons does affect physical observables. They represent virtually excited anyons which wind around real anyonic excitations. These topological bubbles result in a temperature-dependent phase shift of Fabry-Perot interference patterns in the fractional quantum Hall regime accessible in current experiments, thus providing a tool for direct and unambiguous observation of elusive fractional statistics.
description: 7 pages, 4 figures, and 9 pages of Supplementary Information
Transition state theory characterizes thin film macrospin dynamics driven by an oscillatory magnetic field: Inertial effects
Creators: name: Maihöfer, Michael
name: Reiff, Johannes
name: Main, Jörg
name: Hernandez, Rigoberto
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Understanding the magnetization switching process in ferromagnetic thin films is essential for many technological applications. We investigate the effects of periodic driving via magnetic fields on a macrospin system under explicit consideration of inertial dynamics. This is usually achieved by extending the Landau-Lifshitz-Gilbert equation with a term including the second time derivative of the magnetization. The dynamics of the magnetization switching can then be characterized by its switching rate. We apply methods from transition state theory for driven systems to resolve the rate of magnetization switching in this general case. In doing so, we find that magnetization exhibits resonance-like behavior under certain driving conditions, and it can be affected strongly by the system's relaxation rate.
description: 13 pages, 5 figures
Lionycteris Thomas 1913
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Lionycteris

description: Lionycteris Thomas, 1913. Ann. Mag. Nat. Hist., ser. 8, 12:270. REVIEWED BY: R. Barquez (RB); T. A. Griffiths (TAG); J. Molinari (JML); V. A. Taddei (VAT). ISIS NUMBER: 5301405008017000000.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 158, DOI: 10.5281/zenodo.7352990
Robust and stable delay interferometers with application to $d$-dimensional time-frequency quantum key distribution
Creators: name: Islam, Nurul T.
name: Aragoneses, Andres
name: Lezama, A.
name: Kim, Jungsang
name: Gauthier, Daniel J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate experimentally a cascade of temperature-compensated unequal-path interferometers that can be used to measure frequency states in a high-dimensional quantum distribution system. In particular, we demonstrate that commercially-available interferometers have sufficient environmental isolation so that they maintain an interference visibility greater than 98.5\% at a wavelength of 1550 nm over extended periods with only moderate passive control of the interferometer temperature ($< \pm0.50 ^{\circ}$C). Specifically, we characterize two interferometers that have matched delays: one with a free-spectral range of 2.5 GHz, and the other with 1.25 GHz. We find that the relative path of these interferometers drifts less than 3~nm over a period of one hour during which the temperature fluctuates by $99\%$ over an hour, which is mainly limited by our ability to precisely generate these states. Overall, our results indicate that these interferometers are well suited for realistic time-frequency quantum distribution protocols.
Fueling limits in a cylindrical viscosity-limited reactor
Creators: name: Rubin, Tal
name: Kolmes, Elijah J.
name: Ochs, Ian E.
name: Mlodik, Mikhail E.
name: Fisch, Nathaniel J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Recently, a method to achieve a "natural hot-ion mode" was suggested, by utilizing ion viscous heating in a rotating plasma with a fixed boundary. We explore the steady-state solution to the Braginskii equations and find the parameter regime in which a significant temperature difference between ions and electrons can be sustained in a driven steady state. The threshold for this effect occurs at $ρ_i\gtrsim0.1R$. An analytic, leading order low flow solution is obtained, and a numerical, moderate Mach number $M\lesssim2$ is investigated. The limitation is found to be at moderate Mach numbers.
description: 24 pages, single column wide format, 3 figures
Lichonycteris obscura Thomas 1895
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Lichonycteris
Lichonycteris obscura

description: Lichonycteris obscura Thomas, 1895. Ann. Mag. Nat. Hist., ser. 6, 16:55. TYPE LOCALITY: Nicaragua, Managua, Managua. DISTRIBUTION: Guatemala to Surinam and Peru. ISIS NUMBER: 5301405008036002001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 158, DOI: 10.5281/zenodo.7352990
Optically assisted trapping with high-permittivity dielectric rings: Towards optical aerosol filtration
Creators: name: Alaee, Rasoul
name: Kadic, Muamer
name: Rockstuhl, Carsten
name: Passian, Ali
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Controlling the transport, trapping, and filtering of nanoparticles is important for many applications. By virtue of their weak response to gravity and their thermal motion, various physical mechanisms can be exploited for such operations on nanoparticles. However, the manipulation based on optical forces is potentially most appealing since it constitutes a highly deterministic approach. Plasmonic nanostructures have been suggested for this purpose, but they possess the disadvantages of locally generating heat and trapping the nanoparticles directly on surface. Here, we propose the use of dielectric rings made of high permittivity materials for trapping nanoparticles. Thanks to their ability to strongly localize the field in space, nanoparticles can be trapped without contact. We use a semi-analytical method to study the ability of these rings to trap nanoparticles. Results are supported by full-wave simulations. Application of the trapping concept to nanoparticle filtration is suggested.
description: 5 figures
Test of Lorentz invariance in $β$ decay of polarized $^{20}\text{Na}$
Creators: name: Sytema, A.
name: Berg, J. E. van den
name: Böll, O.
name: Chernowitz, D.
name: Dijck, E. A.
name: Grasdijk, J. O.
name: Hoekstra, S.
name: Jungmann, K.
name: Mathavan, S. C.
name: Meinema, C.
name: Mohanty, A.
name: Müller, S. E.
name: Noordmans, J. P.
name: Portela, M. Nuñez
name: Onderwater, C. J. G.
name: Pijpker, C.
name: Timmermans, R. G. E.
name: Vos, K. K.
name: Willmann, L.
name: Wilschut, H. W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We search for a dependence of the lifetime of $^{20}\text{Na}$ nuclei on the nuclear spin direction. Such a directional dependence would be evidence for Lorentz-invariance violation in weak interactions. A difference in lifetime between nuclei that are polarized in the east and west direction is searched for. This difference is maximally sensitive to the rotation of the Earth, while the sidereal dependence is free from most systematic errors. The experiment sets a limit of $2\times 10^{-4}$ at 90 % C.L. on the amplitude of the sidereal variation of the relative lifetime differences, an improvement by a factor 15 compared to an earlier result.
description: 23 pages, 8 figures, 4 tables
Lionycteris spurrelli Thomas 1913
Creators: name: Honacki, James H.
name: Kinman, Kenneth E.
name: Koeppl, James W.
Publisher: name: Zenodo
Year: 1982
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Lionycteris
Lionycteris spurrelli

description: Lionycteris spurrelli Thomas, 1913. Ann. Mag. Nat. Hist., ser. 8, 12:271. TYPE LOCALITY: Colombia, Choco, Condoto. DISTRIBUTION: E. Panama; Guyana; Surinam; Amazonian Brazil; Venezuela; Colombia; Amazonian Peru. COMMENT: A junior synonym is Lancophylla sp. (sic) (part), Piccinini, 1974, Bol. Mus. Para. Emilio Goeldi, Belem, 77:13; see Taddei et al., 1978, Bol. Mus. Para. Emilio Goeldi, Belem, 92:1. Williams and Genoways, 1980, Ann. Carnegie Mus., 49, extended the range to Surinam. ISIS NUMBER: 5301405008017001001.
description: Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Chiroptera, pp. 111-215 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 158, DOI: 10.5281/zenodo.7352990
description: {"references": ["Taddei, V. A., L. D. Vizotto, and I. Sazima. 1978. Notas sobre Lionycteris e Lonchophylla nas colecoes do Museu Paraense Emilio Goeldi (Mammalia, Chiroptera, Phyllostomidae). Boletim do Museu Paraense Emilio Goeldi, Nova Serie, Zoologia, 92: 1 - 14."]}
Schooling in a colonial setting, an account of the boy's school, Davuilevu, Fiji
Creators: name: James, Kenneth Neil.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Rotation-k Affine-Power-Affine-like Multiple Substitution-Boxes for Secure Communication
Creators: name: Ahmad, Musheer
name: AlSharari, Hamed D
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Substitution boxes with thorough cryptographic strengths are essential for the development of strong encryption systems. They are the only portions capable of inducing nonlinearity in symmetric encryption systems. Bijective substitution boxes having both high nonlinearities and high algebraic complexities are the most desirable to thwart linear, differential and algebraic attacks. In this paper, a method of constructing algebraically complex and cryptographically potent multiple substitution boxes is proposed. The multiple substitution boxes are synthesized by applying the concept of rotation-k approach on the affine-power-affine structure. It is shown that the rotation-k approach inherits all the features of affine-power-affine structure. Performance assessment of all the proposed substitution boxes is done against nonlinearity, strict avalanche criteria, bits independent criteria, differential probability, linear approximation probability and algebraic complexity. It has been found that the proposed substitution boxes have outstanding cryptographic characteristics and outperform the various recent substitution boxes.
description: 6 pages, IJARCS Journal paper
Secure Implementation of a Vehicular Application for the Symbian Platform
Creators: name: Martín-Fernández, F.
name: Caballero-Gil, C.
name: Caballero-Gil, P.
name: Molina-Gil, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: A vehicular ad-hoc network is a type of communication network where the nodes are vehicles. Their aim is to manage traffic efficiently in order to prevent unwanted events such as accidents, jams, etc. The research on this type of networks assumes the use of additional infrastructure installed on the roads, and special devices installed in vehicles. In this paper we propose a novel solution for the deployment of vehicular networks, which uses only existing smartphones with technologies such as Wi-Fi, GPS and Bluetooth. This approach will save the costs of road infrastructure deployment and extra vehicles devices, making it possible to deploy the first real-world vehicular ad-hoc network with a low cost. In particular, the developed implementation of the proposal for the Symbian platform is here examined in full detail.
Volatility Modelling with High-Frequency Financial Data on a Continuous Time Scale
Creators: name: Sofronis, Georgios
Publisher: name: Lancaster University
Year: 2023
Subjects: High-frequency data
Financial volatility
Continuous time modeling

description: Financial volatility is the core of multiple sectors in finance. This work investigates different aspects of volatility using high-frequency data. High-frequency data offer a complete picture of the dynamics of the intraday patterns, contributing to a more precise inference about these patterns. However, their complex structural form yields several challenges in the analysis for the practitioners. Our research takes place in both the univariate and multivariate space, meaning that we explore the data characteristics for every asset separately and as a factor of interactions among the assets. In terms of the analysis in the univariate space, Chapters 2 and 4 develop some volatility estimators in discrete and continuous time scales, respectively. More specifically, we develop several estimators of the intraday volatility in Chapter 2 where each estimator approximates the intraday volatility, exploiting different characteristics of the dataset. On the other hand, we consider an estimator of the daily volatility along with its theoretical framework in Chapter 4. Our simulation study shows that our estimator is superior to standard estimators of daily volatility when the variance of the noise incorporated in the intraday observations takes values of normal size. In the multivariate space, Chapter 3 studies whether we can decompose the daily volatility traits to some components, inferring the assets which drive these components the most. Also, we extend the relevant methodology to volatility estimates with high frequency, as those provided by the estimators in Chapter 2. Through our proposed approach, we can deduce the stocks which present the highest variability as well as the intraday periods this variability is observed more intensely. In Chapter 5, we develop a technique for estimating the conditional dependence structure between the assets using the concept of graphical models. This chapter treats high-frequency data as functional data, allowing us to exploit their virtues to draw inferences about the assets’ conditional interdependencies.
Pulsar radio emission mechanism II. On the origin of relativistic Langmuir solitons in pulsar plasma
Creators: name: Rahaman, Sk. Minhajur
name: Mitra, Dipanjan
name: Melikidze, George I.
name: Lakoba, Taras
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations suggest that coherent radio emission from pulsars is excited in a dense pulsar plasma by curvature radiation from charge bunches. Numerous studies propose that these charge bunches are relativistic charge solitons which are solutions of the non-linear Schrödinger equation (NLSE) with a group velocity dispersion ($G$), cubic-nonlinearity($q$) and non-linear Landau damping ($s$). The formation of stable solitons crucially depends on the parameters $G, q$ and $s$ and the particle distribution function. In this work, we use realistic pulsar plasma parameters obtained from observational constraints to explore the parameter space of NLSE for two representative distribution functions (DF) of particles' momenta: Lorentzian (long-tailed) and Gaussian (short-tailed). The choice of DF critically affects the value of $|s/q|$, which, in turn, determines whether solitons can form. Numerical simulations show that well-formed solitons are obtained only for small values of $|s/q| \lesssim 0.1$ while for moderate and higher values of $|s/q| \gtrsim 0.5$ soliton formation is suppressed. Small values for $|s/q| \sim 0.1$ are readily obtained for long-tailed DF for a wide range of plasma temperatures. On the other hand, short-tailed DF provides these values only for some narrow range of plasma parameters. Thus, the presence of a prominent high-energy tail in the particle DF favours soliton formation for a wide range of plasma parameters. Besides pair plasma, we also include an iron ion component and find that they make a negligible contribution in either modifying the NLSE coefficients or contributing to charge separation.
description: Accepted for publication in MNRAS