cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Euler-type formula for $β(2n)$ and closed-form expressions for a class of zeta series
Creators: name: Lima, F. M. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 30B50, 11M36, 65D15

description: In a recent work, Dancs and He found an Euler-type formula for $\,ζ{(2\,n+1)}$, $\,n\,$ being a positive integer, which contains a series they could not reduce to a finite closed-form. This open problem reveals a greater complexity in comparison to $ζ(2n)$, which is a rational multiple of $π^{2n}$. For the Dirichlet beta function, the things are `inverse': $β(2n+1)$ is a rational multiple of $π^{2n+1}$ and no closed-form expression is known for $β(2n)$. Here in this work, I modify the Dancs-He approach in order to derive an Euler-type formula for $\,β{(2n)}$, including $\,β{(2)} = G$, the Catalan's constant. I also convert the resulting series into zeta series, which yields new exact closed-form expressions for a class of zeta series involving $\,β{(2n)}$ and a finite number of odd zeta values. A closed-form expression for a certain zeta series is also conjectured.
description: 11 pages, no figures. A few small corrections. ACCEPTED for publication in: Integral Transf. Special Functions (09/11/2011)
Additional file 1 of The barley powdery mildew effectors CSEP0139 and CSEP0182 suppress cell death and promote B. graminis fungal virulence in plants
Creators: name: Li, Xue
name: Jin, Cong
name: Yuan, Hongbo
name: Huang, Wanting
name: Liu, Fang
name: Fan, Renchun
name: Xie, Jiankun
name: Shen, Qian-Hua
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 1: Table S1. CSEPs suppressing cell death triggered by BAX and MEK2DD in N. benthamiana. Table S2. Scoring of haustorium index after overexpression of CSEP0139 or CSEP0182 in barley P01 in compatible (P01/BghA6) and incompatible (P01/BghK1) interaction. Table S3. Scoring of haustorium index after silencing of CSEP0139 or CSEP0182 by HIGS approach. Table S4. List of primers used in this study. Table S5. List of constructs used in this study.
M31N 2007-11d: A Slowly-Rising, Luminous Nova in M31
Creators: name: Shafter, A. W.
name: Rau, A.
name: Quimby, R. M.
name: Kasliwal, M. M.
name: Bode, M. F.
name: Darnley, M. J.
name: Misselt, K. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a series of extensive photometric and spectroscopic observations of the luminous M31 nova M31N 2007-11d. Our photometric observations coupled with previous measurements show that the nova took at least four days to reach peak brightness at R~14.9 on 20 Nov 2007 UT. After reaching maximum, the time for the nova to decline 2 and 3 magnitudes from maximum light (t_2 and t_3) was ~9.5 and ~13 days, respectively, establishing that M31N 2007-11d was a moderately fast declining nova. During the nova's evolution a total of three spectra were obtained. The first spectrum was obtained one day after maximum light (5 days post-discovery), followed by two additional spectra taken on the decline at two and three weeks post-maximum. The initial spectrum reveals narrow Balmer and Fe II emission with P Cygni profiles superimposed on a blue continuum. These data along with the spectra obtained on the subsequent decline clearly establish that M31N 2007-11d belongs to the Fe II spectroscopic class. The properties of M31N 2007-11d are discussed within the context of other luminous novae in M31, the Galaxy, and the LMC. Overall, M31N 2007-11d appears to be remarkably similar to Nova LMC 1991, which was another bright, slowly-rising, Fe II nova. A comparison of the available data for luminous extragalactic novae suggest that the >~4 day rise to maximum light seen in M31N 2007-11d may not be unusual, and that the rise times of luminous Galactic novae, usually assumed to be
description: Accepted for publication in The Astrophysical Journal (28 pages, 6 figures)
Resolvent estimates for non-selfadjoint operators with double characteristics
Creators: name: Viola, Joe
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 47A10, 35P15

description: We study resolvent estimates for non-selfadjoint semiclassical pseudodifferential operators with double characteristics. Assuming that the quadratic approximation along the double characteristics is elliptic, we obtain polynomial upper bounds on the resolvent in a suitable region inside the pseudospectrum.
description: 38 pages. J. London Math. Soc., to appear. Published version may differ
Quantitative stability of Gel'fand's inverse boundary problem
Creators: name: Burago, Dmitri
name: Ivanov, Sergei
name: Lassas, Matti
name: Lu, Jinpeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 35R30, 58J50, 53C21, 58J45

description: In Gel'fand's inverse problem, one aims to determine the topology, differential structure and Riemannian metric of a compact manifold $M$ with boundary from the knowledge of the boundary $\partial M,$ the Neumann eigenvalues $λ_j$ and the boundary values of the eigenfunctions $φ_j|_{\partial M}$. We show that this problem has a stable solution with quantitative stability estimates in a class of manifolds with bounded geometry. More precisely, we show that finitely many eigenvalues and the boundary values of corresponding eigenfunctions, known up to small errors, determine a metric space that is close to the manifold in the Gromov-Hausdorff sense. We provide an algorithm to construct this metric space. This result is based on an explicit estimate on the stability of the unique continuation for the wave operator.
description: introduction updated, to appear in Anal. PDE
A time - luminosity correlation for Gamma Ray Bursts in the X - rays
Creators: name: Dainotti, M. G.
name: Cardone, V. F.
name: Capozziello, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma ray bursts (GRBs) have recently attracted much attention as a possible way to extend the Hubble diagram to very high redshift. However, the large scatter in their intrinsic properties prevents directly using them as distance indicator so that the hunt is open for a relation involving an observable property to standardize GRBs in the same way as the Phillips law makes it possible to use Type Ia Supernovae (SNeIa) as standardizable candles. We use here the data on the X - ray decay curve and spectral index of a sample of GRBs observed with the Swift satellite. These data are used as input to a Bayesian statistical analysis looking for a correlation between the X - ray luminosity L_X(T_a) and the time constant T_a of the afterglow curve. We find a linear relation between \log{[L_X(T_a)]} and \log{[T_a/(1+z)]} with an intrinsic scatter sigma_{int} = 0.33 comparable to previously reported relations. Remarkably, both the slope and the intrinsic scatter are almost independent on the matter density Omega_M and the constant equation of state w of the dark energy component thus suggesting that the circularity problem is alleviated for the $L_X - T_a$ relation.
description: 5 pages, 2 figures, accepted for publication on MNRAS Letters
Detection of the Crab Nebula by the prototype Schwarzschild-Couder Telescope
Creators: name: Adams, C. B.
name: Ambrosi, G.
name: Ambrosio, M.
name: Aramo, C.
name: Batista, P. I.
name: Benbow, W.
name: Bertucci, B.
name: Bissaldi, E.
name: Bitossi, M.
name: Boiano, A.
name: Bonavolontà, C.
name: Bose, R.
name: Brill, A.
name: Brown, A. M.
name: Buckley, J. H.
name: Cameron, R. A.
name: Canestrari, R.
name: Capasso, M.
name: Caprai, M.
name: Covault, C. E.
name: Depaoli, D.
name: Di Venere, L.
name: Errando, M.
name: Fegan, S.
name: Feng, Q.
name: Fiandrini, E.
name: Furniss, A.
name: Gent, A.
name: Giglietto, N.
name: Giordano, F.
name: Giro, E.
name: Halliday, R.
name: Hervet, O.
name: Holder, J.
name: Humensky, T. B.
name: Incardona, S.
name: Ionica, M.
name: Jin, W.
name: Kieda, D.
name: Licciulli, F.
name: Loporchio, S.
name: Marsella, G.
name: Masone, V.
name: Meagher, K.
name: Meures, T.
name: Mode, B. A. W.
name: Mognet, S. A. I.
name: Mukherjee, R.
name: Okumura, A.
name: Otte, N.
name: Pantaleo, F. R.
name: Paoletti, R.
name: Pareschi, G.
name: Di Pierro, F.
name: Pueschel, E.
name: Ribeiro, D.
name: Riitano, L.
name: Roache, E.
name: Rousselle, J.
name: Rugliancich, A.
name: Santander, M.
name: Shang, R.
name: Stiaccini, L.
name: Tajima, H.
name: Taylor, L. P.
name: Tosti, L.
name: Tovmassian, G.
name: Tripodo, G.
name: Vagelli, V.
name: Valentino, M.
name: Vandenbroucke, J.
name: Vassiliev, V. V.
name: Williams, D. A.
name: Zink, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Schwarzschild-Couder Telescope (SCT) is a medium-sized telescope technology proposed for the Cherenkov Telescope Array. It uses a novel dual-mirror optical design that removes comatic aberrations across its entire field of view. The SCT camera employs high-resolution silicon photomultiplier (SiPM) sensors with a pixel size of 4 arcminutes. A prototype SCT (pSCT) has been constructed at the Fred Lawrence Whipple Observatory in Arizona, USA. An observing campaign in 2020, with a partial camera of 1600 pixels (2.7 degrees by 2.7 degrees field of view) resulted in detection of the Crab Nebula at 8.6 sigma statistical significance. Work on the pSCT camera and optical system is ongoing to improve performance and prepare for an upcoming camera upgrade. The pSCT camera upgrade will replace the current camera modules with improved SiPMs and readout electronics and will expand the camera to its full design field of view of 8 degrees in diameter (11,328 pixels). The fully upgraded pSCT will enable next-generation very-high-energy gamma-ray astrophysics through excellent background rejection and angular resolution. In this presentation we describe first results from the successful operation of the pSCT and future plans.
description: 9 pages, 3 figures, 2 tables, contribution to ICRC 2021, similar to 10.1016/j.astropartphys.2021.102562 (arXiv:2012.08448)
Flavour Changing Neutral Current Constraints from Kaluza-Klein Gluons and Quark Mass Matrices in RS1
Creators: name: Chang, We-Fu
name: Ng, John N.
name: Wu, Jackson M. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We continue our previous study on what are the allowed forms of quark mass matrices in the Randall-Sundrum (RS) framework that can reproduce the experimentally observed quark mass spectrum and the CKM mixing pattern. We study the constraints the $ΔF = 2$ processes in the neutral meson sector placed on the admissible forms found there, and we found only the asymmetrical type of quark mass matrices arising from anarchical Yukawa structures stay viable at the few TeV scale reachable at the LHC. We study also the decay of the first Kaluza-Klein (KK) excitation of the gluon. We give the decay branching ratios into quark pairs, and we point out that measurements of the decay width and just one of the quark spins in the dominant $\bar{t}t$ decays can be used to extract the effective coupling of the first KK gluon to top quarks for both chiralities. This provides further probe to the flavour structure of the RS framework.
description: v2: 23 pages, 1 figure. Typos corrected, references added. Discussions in Sec. III extended with clarifications, Additional appendix added
Rainfall forecast in northeast of thailand using modified k-nearest neighbor
Creators: name: Uruya Weesakul
name: Nkrintra Singhratta
name: Narongrit Luangdilok
Publisher: name: Faculty of Engineering, Khon Kaen University
Year: 2014
Subjects: Large-scale atmospheric variables, Modified k-nearest neighbor

description: 2, 41, KKU Engineering Journal
Algebraic cycles on Prym varieties
Creators: name: Arap, Maxim
Publisher: name: arXiv
Year: 2009
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C25, 14H40, 14H51

description: This article proposes a generalization of tautological rings introduced by Beauville and Moonen for Jacobians. The main result is that, under certain hypotheses, the special subvarieties of Prym varieties are algebraically equivalent and their classes belong to the tautological ring.
description: entirely rewritten, final version
Hardy and Rellich inequalities with Bessel pairs
Creators: name: Ruzhansky, Michael
name: Sabitbek, Bolys
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35A23, 35R45, 35B09, 34A40

description: In this paper, we establish suitable characterisations for a pair of functions $(W(x),H(x))$ on a bounded, connected domain $Ω\subset \mathbb{R}^n$ in order to have the following Hardy inequality
 \begin{equation*}
 \int_Ω W(x) |\nabla u|_A^2 dx \geq \int_Ω |\nabla d|^2_AH(x)|u|^2 dx, \,\,\, u \in C^{1}_0(Ω),
 \end{equation*}
 where $d(x)$ is a suitable quasi-norm (gauge), $|ξ|^2_A = \langle A(x)ξ, ξ\rangle$ for $ξ\in \mathbb{R}^n$ and $A(x)$ is an $n\times n$ symmetric, uniformly positive definite matrix defined on a bounded domain $Ω\subset \mathbb{R}^n$. We also give its $L^p$ analogue. As a consequence, we present examples for a standard Laplacian on $\mathbb{R}^n$, Baouendi-Grushin operator, and sub-Laplacians on the Heisenberg group, the Engel group and the Cartan group. Those kind of characterisations for a pair of functions $(W(x),H(x))$ are obtained also for the Rellich inequality. These results answer the open problems of Ghoussoub-Moradifam \cite{GM_book}.
Molecules with ALMA at Planet-forming Scales. XX. The Massive Disk Around GM Aurigae
Creators: name: Schwarz, Kamber R.
name: Calahan, Jenny K.
name: Zhang, Ke
name: Alarcón, Felipe
name: Aikawa, Yuri
name: Andrews, Sean M.
name: Bae, Jaehan
name: Bergin, Edwin A.
name: Booth, Alice S.
name: Bosman, Arthur D.
name: Cataldi, Gianni
name: Cleeves, L. Ilsedore
name: Czekala, Ian
name: Huang, Jane
name: Ilee, John D.
name: Law, Charles J.
name: Gal, Romane Le
name: Liu, Yao
name: Long, Feng
name: Loomis, Ryan A.
name: Macías, Enrique
name: McClure, Melissa
name: Ménard, François
name: Öberg, Karin I.
name: Teague, Richard
name: van Dishoeck, Ewine
name: Walsh, Catherine
name: Wilner, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gas mass remains one of the most difficult protoplanetary disk properties to constrain. With much of the protoplanetary disk too cold for the main gas constituent, H2, to emit, alternative tracers such as dust, CO, or the H2 isotopolog HD are used. However, relying on disk mass measurements from any single tracer requires assumptions about the tracer's abundance relative to \hh\ and the disk temperature structure. Using new Atacama Large Millimeter/submillimeter Array (ALMA) observations from the Molecules with ALMA at Planet-forming Scales (MAPS) ALMA Large Program as well as archival ALMA observations, we construct a disk physical/chemical model of the protoplanetary disk GM Aur. Our model is in good agreement with the spatially resolved CO isotopolog emission from eleven rotational transitions with spatial resolution ranging from 0.15'' to 0.46'' (24-73 au at 159 pc) and the spatially unresolved HD J=1-0 detection from Herschel. Our best-fit model favors a cold protoplanetary disk with a total gas mass of approximately 0.2 solar masses, a factor of 10 reduction in CO gas inside roughly 100 au and a factor of 100 reduction outside of 100 au. Despite its large mass, the disk appears to be on the whole gravitationally stable based on the derived Toomre Q parameter. However, the region between 70 and 100 au, corresponding to one of the millimeter dust rings, is close to being unstable based on the calculated Toomre Q of <1.7. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.
description: 18 pages, 12 figures
Interface states and anomalous quantum oscillations in graphene hybrid structures
Creators: name: Puls, C. P.
name: Staley, N. E.
name: Liu, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: One- and two-layer graphene have recently been shown to feature new physical phenomena such as unconventional quantum Hall effects and prospects of supporting a non-silicon technological platform using epitaxial graphene. While both one- and two-layer graphene have been studied extensively, continuous sheets of graphene possessing both parts have not yet been explored. Here we report a study of such graphene hybrid structures. In a bulk hybrid featuring two large-area one- and two-layer graphene and an interface between them, two sets of Landau levels and features related to the interface were found. In edge hybrids featuring a large two-layer graphene with narrow one-layer graphene edges, we observed an anomalous suppression in quantum oscillation amplitude due to the locking of one- and two-layer graphene Fermi energies and emergent chiral interface states. These findings demonstrate the importance of these hybrid structures whose unique interface states and related phenomena deserve further studies.
description: 4 pages, 4 figures
Deterministic Sampling on the Circle using Projected Cumulative Distributions
Creators: name: Frisch, Daniel
name: Hanebeck, Uwe D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a method for deterministic sampling of arbitrary continuous angular density functions. With deterministic sampling, good estimation results can typically be achieved with much smaller numbers of samples compared to the commonly used random sampling. While the Unscented Kalman Filter uses deterministic sampling as well, it only takes the absolute minimum number of samples. Our method can draw arbitrary numbers of deterministic samples and therefore improve the quality of state estimation. Conformity between the continuous density function (reference) and the Dirac mixture density, i.e., sample locations (approximation) is established by minimizing the difference of the cumulatives of many univariate projections. In other words, we compare cumulatives of probability densities in the Radon space.
description: 11 pages, 5 figures
Kronoseismology V: A Panoply of Waves in Saturn's C Ring Driven by High-Order Internal Planetary Oscillations
Creators: name: French, R. G.
name: Bridges, B.
name: Hedman, M. M.
name: Nicholson, P. D.
name: Mankovich, C.
name: McGhee-French, C. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Saturn's rings act as a system of innumerable test particles that are remarkably sensitive to periodic disturbances in the planet's gravitational field. We identify 15 additional density and bending waves in Saturn's C ring driven by the planet's internal normal mode oscillations. Taking advantage of a highly accurate absolute radius scale for the rings, we are able to detect weak, high-wavenumber (up to m=14) waves with km-scale radial wavelengths. From a systematic scan of the entire C ring, we report the discovery and identification of 11 new Outer Lindblad Resonances (OLRs), two counterpart inner Lindblad resonances (ILRs), and two new Outer Vertical Resonances (OVRs). The close agreement of the observed resonance locations and wave rotation rates with the predictions of models of Saturn's interior suggests that all of the new waves are driven by Saturnian f-mode oscillations. As classified by their spherical harmonic shapes, the modes in question range in azimuthal wavenumber from m=8 to 14, with associated resonance orders l-m ranging from 0 to 8, where l is the overall angular wavenumber of the mode. Our suite of detections for l-m=4 is now complete from m=8 to m=14. Curiously, detections with l-m=2 are less common. These newly-identified non-sectoral waves sample latitudinal as well as radial structure within the planet and may thus provide valuable constraints on Saturn's differential rotation. Allowing for the fact that the two ILR-type waves appear to be due to the same normal modes as two of the OLR-type waves, the 13 additional modes identified here bring to 34 the number of distinct f-modes suitable for constraining interior models.
description: Accepted for publication in Icarus
Synthesis and opto-electronic properties of green light emitting metal Schiff base complexes
Creators: name: Nayak, P. H. Amith
name: Naik, H. S. Bhojya
name: Teja, H. B.
name: Kirthan, B. R.
name: Viswanath, R.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified

description: Schiff base copper complex for OLEDs application was synthesized and ligand was characterized by NMR, mass spectroscopy, FTIR, and powder XRD. Photo-physical properties were recorded on UV-visible and photoluminescence spectroscopy. Their phosphorescent emissive-layer in green light emitting multi-layered OLED device was investigated. It exhibits CIE chromaticity color coordinates at x = 0.377 and y = 0.583. The maximum brightness, current efficiency and power efficiency for the 3.0 weight% Cu(II) complex doped electroluminescent device are 6436 cd/m2, 15.4 cd/A and 6.7 lm/W, respectively. These results opens the route for the development of cost-effective metal complex for Opto-electronic applications as a part of strong electroluminescent materials.
Some New Results in Geometric Analysis
Creators: name: Coiculescu, Matei P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: This thesis presents three results in geometric analysis. We first analyze the curve-shortening flow on figure eight curves in the plane. Afterwards, we examine the point-wise curvature preserving flow on space curves. Lastly, we present an abridgment of our work on a family of three-dimensional Lie groups, which, when equipped with canonical left-invariant metrics, interpolate between Sol and hyperbolic space.
description: Undergraduate thesis, Brown University, 72 pages. Further clarifications made in Chapter 2. arXiv admin note: text overlap with arXiv:2005.06430
Connected sums of codimension two locally flat submanifolds
Creators: name: Livingston, Charles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N35

description: Let X and Y be oriented topological manifolds of dimension n + 2, and let K and J be connected, locally-flat, oriented, n-dimensional submanifolds of X and Y. We show that up to orientation preserving homeomorphism there is a well-defined connected sum K # J in X # Y. For n = 1, the proof is classical, relying on results of Rado and Moise. For dimensions n = 3 and n > 5, results of Edwards-Kirby, Kirby, and Kirby-Siebenmann concerning higher dimensional topological manifolds are required. For n = 2, 4, and 5, Freedman and Quinn's work on topological four-manifolds is needed. The truth of the corresponding statement for higher codimension seems to be unknown.
description: 10 pages
Supercurrent transferring through c-axis cuprate Josephson junctions with thick normal-metal-bridge
Creators: name: Yan, Xin-Zhong
name: Ting, C. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: With simple but exactly solvable model, we investigate the supercurrent transferring through the c-axis cuprate superconductor-normal metal-superconductor junctions with the clean normal metal much thicker than its coherence length. It is shown that the supercurrent as a function of thickness of the normal metal decreases much slower than the exponential decaying expected by the proximity effect. The present result may account for the giant proximity effect observed in the c-axis cuprate SNS junctions.
description: 6 pages, 4 figures
Diffusive behavior for randomly kicked Newtonian particles in a spatially periodic medium
Creators: name: Clark, Jeremy
name: Maes, Christian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove a central limit theorem for the momentum distribution of a particle undergoing an unbiased spatially periodic random forcing at exponentially distributed times without friction. The start is a linear Boltzmann equation for the phase space density, where the average energy of the particle grows linearly in time. Rescaling time, the momentum converges to a Brownian motion, and the position is its time-integral showing superdiffusive scaling with time $t^{3/2}$. The analysis has two parts: (1) to show that the particle spends most of its time at high energy, where the spatial environment is practically invisible; (2) to treat the low energy incursions where the motion is dominated by the deterministic force, with potential drift but where symmetry arguments cancel the ballistic behavior.
description: 55 pages. Some typos corrected from previous version
Additional file 6 of Selfish uptake versus extracellular arabinoxylan degradation in the primary degrader Ruminiclostridium cellulolyticum, a new string to its bow
Creators: name: Liu, Nian
name: Gagnot, Séverine
name: Denis, Yann
name: Byrne, Deborah
name: Faulds, Craig
name: Fierobe, Henri-Pierre
name: Perret, Stéphanie
Publisher: name: figshare
Year: 2022
Subjects: subject: Biophysics
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: Biological Sciences not elsewhere classified

description: Additional file 6. Molecular analysis of the Ruminiclostridium cellulolyticum mutant strain. PCR and southern blot analysis on the wild-type and the mutant strains are presented.
Potential of the Sterile Insect Technique for Control of Deer Ticks, $\textit{Ixodes scapularis}$
Creators: name: Kirby, Thomas G.
name: Blackwood, Julie C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Dynamical Systems (math.DS)
subject: FOS: Biological sciences
subject: FOS: Mathematics
subject: 92D45 (Primary) 92D25, 37N25, 39A60 (Secondary)

description: The deer tick, $\textit{Ixodes scapularis}$, is a vector for numerous human diseases, including Lyme disease, anaplasmosis, and babesiosis. Concern is rising in the US and abroad as the population and range of this species grow and new diseases emerge. Herein I consider the potential for control of $\textit{I. scapularis}$ using the Sterile Insect Technique (SIT), which acts by reducing net fertility through release of sterile males. I construct a population model with density-dependent and -independent growth, migration, and an Allee effect (decline of the population when it is small), and use this model to simulate sterile tick release in both single- and multi-patch frameworks. I test two key concerns with implementing $\textit{I. scapularis}$ SIT: that the ticks' lengthy life course could make control take too long and that low migration might mean sterile males need thorough manual dispersal to all parts of the control area. Results suggest that typical $\textit{I. scapularis}$ SIT programs will take about eight years, a prediction near the normal range for the technique, but that thorough distribution of sterile ticks over the control area is indeed critical, increasing expense substantially by necessitating aerial release. With particularly high rearing costs also expected for $\textit{I. scapularis}$, the latter finding suggests that cost-effectiveness improvements to aerial release may be a prerequisite to $\textit{I. scapularis}$ SIT.
description: 32 pages, 5 figures
Stochastic homogenization for variational solutions of Hamilton-Jacobi equations
Creators: name: Viterbo, Claude
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: Let $(Ω, μ)$ be a probability space endowed with an ergodic action, $τ$ of $( {\mathbb R} ^n, +)$. Let $H(x,p; ω)=H_ω(x,p)$ be a smooth Hamiltonian on $T^* {\mathbb R} ^n$ parametrized by $ω\in Ω$ and such that $ H(a+x,p;τ_aω)=H(x,p;ω)$. We consider for an initial condition $f\in C^0 ( {\mathbb R}^n)$, the family of variational solutions of the stochastic Hamilton-Jacobi equations $$\left\{ \begin{aligned} \frac{\partial u^{ \varepsilon }}{\partial t}(t,x;ω)+H\left (\frac{x}{ \varepsilon } , \frac{\partial u^\varepsilon }{\partial x}(t,x;ω);ω\right )=0 &\\ u^\varepsilon (0,x;ω)=f(x)& \end{aligned} \right .$$ Under some coercivity assumptions on $p$ -- but without any convexity assumption -- we prove that for a.e. $ω\in Ω$ we have $C^0-\lim u^{\varepsilon}(t,x;ω)=v(t,x)$ where $v$ is the variational solution of the homogenized equation $$\left\{ \begin{aligned} \frac{\partial v}{\partial t}(x)+{\overline H}\left (\frac{\partial v }{\partial x}(x) \right )=0 &\\ v (0,x)=f(x)& \end{aligned} \right.$$
description: 56 pages, 3 figures
First Results from the Catalina Real-time Transient Survey
Creators: name: Drake, A. J.
name: Djorgovski, S. G.
name: Mahabal, A.
name: Beshore, E.
name: Larson, S.
name: Graham, M. J.
name: Williams, R.
name: Christensen, E.
name: Catelan, M.
name: Boattini, A.
name: Gibbs, A.
name: Hill, R.
name: Kowalski, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the results from the first six months of the Catalina Real-time Transient Survey (CRTS). In order to search for optical transients with timescales of minutes to years, the CRTS analyses data from the Catalina Sky Survey which repeatedly covers twenty six thousand of square degrees on the sky. The CRTS provides a public stream of transients that are bright enough to be followed up using small telescopes. Since the beginning of the survey, all CRTS transients have been made available to astronomers around the world in real-time using HTML tables, RSS feeds and VOEvents. As part of our public outreach program the detections are now also available in KML through Google Sky. The initial discoveries include over 350 unique optical transients rising more than two magnitudes from past measurements. Sixty two of these are classified as supernovae, based on light curves, prior deep imaging and spectroscopic data. Seventy seven are due to cataclysmic variables (only 13 previously known), while an additional 100 transients were too infrequently sampled to distinguish between faint CVs and SNe. The remaining optical transients include AGN, Blazars, high proper motions stars, highly variable stars (such as UV Ceti stars) and transients of an unknown nature. Our results suggest that there is a large population of SNe missed by many current supernova surveys because of selection biases. These objects appear to be associated with faint host galaxies. We also discuss the unexpected discovery of white dwarf binary systems through dramatic eclipses.
description: 19 pages, submitted ApJ
Gaussian Mixture Estimation from Weighted Samples
Creators: name: Frisch, Daniel
name: Hanebeck, Uwe D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 62G07

description: We consider estimating the parameters of a Gaussian mixture density with a given number of components best representing a given set of weighted samples. We adopt a density interpretation of the samples by viewing them as a discrete Dirac mixture density over a continuous domain with weighted components. Hence, Gaussian mixture fitting is viewed as density re-approximation. In order to speed up computation, an expectation-maximization method is proposed that properly considers not only the sample locations, but also the corresponding weights. It is shown that methods from literature do not treat the weights correctly, resulting in wrong estimates. This is demonstrated with simple counterexamples. The proposed method works in any number of dimensions with the same computational load as standard Gaussian mixture estimators for unweighted samples.
description: 7 pages, 2 (10) figures
My experience as a host at La Cevicheria restaurants
Creators: name: Cavadia Pájaro, Jordan
Publisher: name: University of Cartagena
Year: 2023
Subjects: subject: Fortalecimiento de relaciones comerciales
subject: Ventas a través de canales digitales
subject: Plataformas y aplicaciones de entrega a domicilio
subject: Estrategias empresariales

description: The following report provides a comprehensive overview of La Cevicheria, a restaurant located in Cartagena, focusing on various aspects such as its background, organizational structure, mission, values, and operational challenges. The information presented in this report is based on my experience in the restaurant la Cevicheria. It is important to mention that this report is written for academic purposes. The report starts with a contextual approach, describing La Cevicheria clientele, location, and physical setting. It highlights the target market and the ways in which the restaurant reaches its customers. The organizational structure is then outlined, detailing the roles and responsibilities of key positions within the restaurant, including the owner, management team, front-of-house staff, and back-of-house staff. Further sections delve into the intangible aspects, such as its culture, work ethic, morale, and general staff interaction. The environment is analyzed, discussing whether it leans towards a professional or informal atmosphere and how it impacts staff and customer interactions. Additionally, the report examines the challenges faced by La Cevicheria on a daily basis or on a larger scale, including issues related to the physical space, resources, clientele, and industry dynamics. The report concludes by addressing specific tasks and objectives of the host role, highlighting the challenges faced during this time, and identifying strengths and weaknesses as an employee. It suggests meaningful and realistic solutions to address the identified problem, emphasizing the importance of effective communication, process optimization, employee engagement, resource management, and continuous improvement. It is important to note that although the information presented in this report is based on general knowledge and understanding, it should be considered in the context of an academic exercise, as it is made using analytical tools learned during the semester and thus provides ideas and recommendations that can be further explored in a practical setting.
Malthusianism and nationalism in republican China
Creators: name: White, Gary Richard
Publisher: name: University of British Columbia
Year: 2010

description: This study deals with the debate over Malthusianism and .population control in China within the context of the growing sense of national awareness which characterized the May Fourth period. Beginning with Liang Ch'i-ch'ao, this controversy was closely linked to the issues of national strength and Social Darwinism by both the opponents and proponents of population control. The proponents of population control tended to be Western-educated intellectuals who believed in the tenets of classical Western liberalism. To them, population control was a means of achieving a better environment for individual development and economic laissez faire. In their opinion, population pressures had more to do with China's woes than exploitation by any nation or economic class. They attempted to justify their views on nationalist grounds by pointing out that the emancipation of the individual was the key to the strength of the Western powers. The opposition to population control viewed population growth as proof of a race's fitness for survival and felt that China faced the threat of eventual national extinction if the rate of population growth in Western countries and Japan continued to be much higher than that in China. Liang Ch'i-ch'ao and Sun Yat-sen shared this appraisal of population growth in China. By studying the books and magazine articles that were written on this question during the period following the May Fourth Incident, it becomes evident that the opponents of population control enjoyed the advantage in harnessing the nationalist sentiments of the Chinese public against population control. This was not the result of any overpowering logic in their arguments. Events in China and around the world tended to confirm the original fears of - Liang Ch'i-ch'ao, and more Chinese grew convinced that China needed to match the population growth of other countries in order to survive in a world of nation-states that they envisioned to be governed by the forces of natural selection as outlined by Charles Darwin's theory of evolution. The advocates of population control grew more defensive in their appeals as their ideas were increasingly portrayed as defeatist and unprogressive. Also, many Chinese nationalists firmly believed in the contradictory nature of individualism and nationalism. To them, Malthusianism was one of the most harmful manifestations of excessive individualism. Although early Marxists such as Li Ta-chao did not oppose Malthusianism on nationalist grounds, later Marxists were able to tap some of the nationalist resentment toward imperialism by arguing that Malthusianism was a great lie promoted by the imperialist powers to avoid responsibility for the economic disruptions that they created in China.
Gravitational-wave constraints on the GWTC-2 events by measuring the tidal deformability and the spin-induced quadrupole moment
Creators: name: Narikawa, Tatsuya
name: Uchikata, Nami
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gravitational waves from compact binary coalescences provide a unique laboratory to test properties of compact objects. As alternatives to the ordinary black holes in general relativity, various exotic compact objects have been proposed. Some of them have largely different values of the tidal deformability and spin-induced quadrupole moment from those of black holes, and their binaries could be distinguished from the binary black hole by using gravitational waves emitted during their inspiral regime, excluding the highly model-dependent merger and ringdown regimes. We reanalyze gravitational waves from low-mass merger events in the GWTC-2, detected by the Advanced LIGO and Advanced Virgo. Focusing on the influence of tidal deformability and spin-induced quadrupole moment in the inspiral waveform, we provide model-independent constraints on deviations from the standard binary black hole case. We find that all events that we have analyzed are consistent with the waveform of the binary black hole in general relativity. Bayesian model selection shows that the hypothesis that the binary is composed of exotic compact objects is disfavored by all events.
description: 13 pages, 6 figures. The tidal contributaions to the phase have been corrected in the latest version
Hostel positioning framework and marketing strategies for a successful instagram business account
Creators: name: Palacios Barranco, Danna Paola
Publisher: name: University of Cartagena
Year: 2023
Subjects: subject: Alianzas estratégicas con agencias de turismo
subject: Estrategias de marketing efectivas
subject: Control sobre ingresos y gastos.

description: Tourism market understanding grants tourist accommodation owners to turn data, trends, and insights into competitive advantages; analogously, social media marketing understanding and use permits brands to create and reach communities to position themselves on the internet. This paper presents the positioning framework and strategies placed by Capitel Hostel to fulfill its objective of success, and the steps that were followed to start the official Instagram account of the Human Sciences Faculty of The University of Cartagena. Furthermore, findings indicate that the correct action approaches of both projects improved overall profitably of the hostel and boosted the image of the faculty and its courses. Keywords: Instagram, strategy, hostel, faculty, advertising
Hayground Windmill
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Windmills
Mills

description: This images shows Hayground Windmill. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
EEGDnet: Fusing Non-Local and Local Self-Similarity for 1-D EEG Signal Denoising with 2-D Transformer
Creators: name: Yi, Peng
name: Chen, Kecheng
name: Ma, Zhaoqi
name: Zhao, Di
name: Pu, Xiaorong
name: Ren, Yazhou
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Electroencephalogram (EEG) has shown a useful approach to produce a brain-computer interface (BCI). One-dimensional (1-D) EEG signal is yet easily disturbed by certain artifacts (a.k.a. noise) due to the high temporal resolution. Thus, it is crucial to remove the noise in received EEG signal. Recently, deep learning-based EEG signal denoising approaches have achieved impressive performance compared with traditional ones. It is well known that the characteristics of self-similarity (including non-local and local ones) of data (e.g., natural images and time-domain signals) are widely leveraged for denoising. However, existing deep learning-based EEG signal denoising methods ignore either the non-local self-similarity (e.g., 1-D convolutional neural network) or local one (e.g., fully connected network and recurrent neural network). To address this issue, we propose a novel 1-D EEG signal denoising network with 2-D transformer, namely EEGDnet. Specifically, we comprehensively take into account the non-local and local self-similarity of EEG signal through the transformer module. By fusing non-local self-similarity in self-attention blocks and local self-similarity in feed forward blocks, the negative impact caused by noises and outliers can be reduced significantly. Extensive experiments show that, compared with other state-of-the-art models, EEGDnet achieves much better performance in terms of both quantitative and qualitative metrics.
Infinite-type loxodromic isometries of the relative arc graph
Creators: name: Abbott, Carolyn R.
name: Miller, Nicholas
name: Patel, Priyam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: An infinite-type surface $Σ$ is of type $\mathcal{S}$ if it has an isolated puncture $p$ and admits shift maps. This includes all infinite-type surfaces with an isolated puncture outside of two sporadic classes. Given such a surface, we construct an infinite family of intrinsically infinite-type mapping classes that act loxodromically on the relative arc graph $\mathcal{A}(Σ, p)$. J. Bavard produced such an element for the plane minus a Cantor set, and our result gives the first examples of such mapping classes for all other surfaces of type $\mathcal{S}$. The elements we construct are the composition of three shift maps on $Σ$, and we give an alternate characterization of these elements as a composition of a pseudo-Anosov on a finite-type subsurface of $Σ$ and a standard shift map. We then explicitly find their limit points on the boundary of $\mathcal{A}(Σ,p)$ and their limiting geodesic laminations. Finally, we show that these infinite-type elements can be used to prove that Map$(Σ,p)$ has an infinite-dimensional space of quasimorphisms.
description: v.2: Minor edits
Viscoelastic Effects during Tangential Contact Analyzed by a Novel Finite Element Approach with Embedded Interface Profiles
Creators: name: Bonari, Jacopo
name: Paggi, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A computational approach that is based on interface finite elements with eMbedded Profiles for Joint Roughness (MPJR) is exploited in order to study the viscoelastic contact problems with any complex shape of the indenting profiles. The MPJR finite elements, previously developed for partial slip contact problems, are herein further generalized in order to deal with finite sliding displacements. The approach is applied to a case study concerning a periodic contact problem between a sinusoidal profile and a viscoelastic layer of finite thickness. In particular, the effect of using three different rheological models that are based on Prony series (with one, two, or three arms) to approximate the viscoelastic behaviour of a real polymer is investigated. The method allows for predicting the whole transient regime during the normal contact problem and the subsequent sliding scenario from full stick to full slip, and then up to gross sliding. The effects of the viscoelastic model approximation and of the sliding velocities are carefully investigated. The proposed approach aims at tackling a class of problems that are difficult to address with other methods, which include the possibility of analysing indenters of generic profile, the capability of simulating partial slip and gross slip due to finite slidings, and, finally, the possibility of simultaneously investigating dissipative phenomena, like viscoelastic dissipation and energy losses due to interface friction.