cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Turbulence Accelerating Cosmology from an Inhomogeneous Dark Fluid
Creators: name: Brevik, I.
name: Timoshkin, A. V.
name: Rabochaya, Ye.
name: Zerbini, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Specific dark energy models with a linear inhomogeneous time-dependent equation of state, within the framework of 4d Friedman-Robertson-Walker (FRW) cosmology, are investigated. It is demonstrated that such 4d inhomogeneous fluid models may lead to a turbulence FRW cosmology. Both one-component and two-component models from 4d inhomogeneous dark fluid models are considered. In the one-component model the universe may develop from a viscous era with, for instance, a constant bulk viscosity, into a turbulent era. In the two-component model the fluid can be decomposed into two components, one non-turbulent (ideal) and another turbulent part, obeying two different equations of state. Conditions for the appearance of the turbulent dark energy universe in terms of the parameters in the equation of state (EoS) without introducing the turbulence concept explicitly are are obtained. An equivalent description in terms of an inhomogeneous fluid for the viscous Little Rip (LR) cosmology is also developed.
description: 14 pages latex2e, no figures. To appear in Astrophys. Space Sci
Instantons and transseries of the Mathieu potential deformed by a $\mathcal{PT}$-symmetry parameter
Creators: name: Alvarenga, N. M.
name: Cavalcanti, E.
name: Linhares, C. A.
name: Lourenço, J. A.
name: Mahon, J. R. P.
name: Reis, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the non-perturbative effects of a deformation of the Mathieu differential equation consistent with $\mathcal{PT}$ symmetry. First, we develop a connection between the non-Hermitian and Hermitian scenarios by a reparameterization in the complex plane, followed by a restriction of the $\mathcal{PT}$ deformation parameter. The latter is responsible for preserving the information about $\mathcal{PT}$ symmetry when we choose to work in the Hermitian scenario. We note that this factor is present in all non-perturbative results and in the transseries representation of the deformed Mathieu partition function that we have obtained. In quantum mechanics, we found that the deformation parameter of $\mathcal{PT}$ symmetry has an effect on the real instanton solution for the deformed Mathieu potential in the Hermitian scenario. As its value increases, the non-Hermiticity factor makes it smoother for the instanton to pass from one minimum to another, that is, it modifies the instanton width. The explanation for this lies in the fact that the height of the potential barrier decreases as we increase the value of the deformation parameter. We present how this effect extends to the multi-instanton level and to the bounce limit of an instanton-anti-instanton pair. As an application of the obtained results, we show that the equation of motion under a tilted version of the potential in the Hermitian scenario compares to the resistively shunted junction (RSJ) model for the Josephson junction.
description: 15 pages, 8 figures; new layout; added references; fixed typos in (old numbering) Eqs.(10), (12), (17)-(19), (29); added definition of instanton and instanton action; included identification of parameters; fixed the labels for axes in the Figs.1 and 4; added and rewrote some paragraphs in Introduction, Sec.II, V and Appendix A; changed titles of Sec.VII and Appendix A; corrected references
CXCR6, a Newly Defined Biomarker of Tissue-Specific Stem Cell Asymmetric Self-Renewal, Identifies More Aggressive Human Melanoma Cancer Stem Cells
Creators: name: Taghizadeh, Rouzbeh
name: Noh, Minsoo
name: Huh, Yang Hoon
name: Ciusani, Emilio
name: Sigalotti, Luca
name: Maio, Michele
name: Arosio, Beatrice
name: Nicotra, Maria R.
name: Natali, PierGiorgio
name: Sherley, James L.
name: La Porta, Caterina A. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Background: A fundamental problem in cancer research is identifying the cell type that is capable of sustaining neoplastic growth and its origin from normal tissue cells. Recent investigations of a variety of tumor types have shown that phenotypically identifiable and isolable subfractions of cells possess the tumor-forming ability. In the present paper, using two lineage-related human melanoma cell lines, primary melanoma line IGR39 and its metastatic derivative line IGR37, two main observations are reported. The first one is the first phenotypic evidence to support the origin of melanoma cancer stem cells (CSCs) from mutated tissue-specific stem cells; and the second one is the identification of a more aggressive subpopulation of CSCs in melanoma that are CXCR6+. Conclusions/Significance: The association of a more aggressive tumor phenotype with asymmetric self-renewal phenotype reveals a previously unrecognized aspect of tumor cell physiology. Namely, the retention of some tissue-specific stem cell attributes, like the ability to asymmetrically self-renew, impacts the natural history of human tumor development. Knowledge of this new aspect of tumor development and progression may provide new targets for cancer prevention and treatment.
Penggunaan platform quiz interaktif Quizizz.com
Creators: name: Karnalim, Oscar
Publisher: name: Zenodo
Year: 2020
Subjects: online learning
interactive quiz

description: Pandemi Covid-19 telah mendorong transisi proses belajar mengajar dari tatap muka menjadi daring. Hal ini secara tidak langsung mengurangi interaksi antara guru dan siswa. Diperlukan adanya platform-platform interaktif guna menjaga proses pembelajaran tetap kondusif. Quizizz.com adalah salah satu platform yang dapat memenuhi kebutuhan terkait karena dilengkapi dengan beberapa fitur-fitur yang menarik, khususnya bagi siswa. Pada workshop kali ini, peserta diajarkan bagimana cara menggunakan Quizizz.com.
On integration of multidimensional version of $n$-wave type equation
Creators: name: Zenchuk, A. I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We represent a version of multidimensional quasilinear partial differential equation (PDE) together with large manifold of particular solutions given in an integral form. The dimensionality of constructed PDE can be arbitrary. We call it the $n$-wave type PDE, although the structure of its nonlinearity differs from that of the classical completely integrable (2+1)-dimensional $n$-wave equation. The richness of solution space to such a PDE is characterized by a set of arbitrary functions of several variables. However, this richness is not enough to provide the complete integrability, which is shown explicitly. We describe a class of multi-solitary wave solutions in details. Among examples of explicit particular solutions, we represent a lump-lattice solution depending on five independent variables. In Appendix, as an important supplemental material, we show that our nonlinear PDE is reducible from the more general multidimensional PDE which can be derived using the dressing method based on the linear integral equation with the kernel of a special type (a modification of the $\bar\partial$-problem). The dressing algorithm gives us a key for construction of higher order PDEs, although they are not discussed in this paper.
description: 36 pages, 2 figures
Phrynobatrachus brongersmai Parker 1936
Creators: name: Miracle, Eulàlia Gassó
name: Van, Lars W.
name: Ostende, Den Hoek
name: Arntzen, Jan Willem
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Phrynobatrachidae
Phrynobatrachus
Phrynobatrachus brongersmai

description: Phrynobatrachus brongersmai Parker, 1936
Parker, 1936. Zool. Meded. Leiden, 19: 90.
 Current name: Phrynobatrachus ogoensis (Boulenger, 1906)
Holotype: RMNH 6591, 1 ɗ. Loc.: “Grand Cape Mount” [Liberia]. Leg.: A.F. Demery. Paratypes: RMNH 6592, 1 Ψ. Loc.: “Soforeh Place” [Liberia]. Leg.: J. Büttikofer and J.A. Sala. RMNH 6593, 1 ɗ. Loc.: “ Liberia ”. Leg.: J. Demery.
 Remarks. Other paratypes are in the Natural History Museum in London (BM 1935.9.2.20, BM 1935.9.2.21).
description: Published as part of Miracle, Eulàlia Gassó, Van, Lars W., Ostende, Den Hoek & Arntzen, Jan Willem, 2007, Type specimens of amphibians in the National Museum of Natural History, Leiden, The Netherlands, pp. 25-68 in Zootaxa 1482 on page 51, DOI: 10.5281/zenodo.176896
Revista da Sociedade Portuguesa de Medicina Física e de Reabilitação, Número 0, Ano 1, 1993
Creators: name: Páscoa Pinheiro, João
Publisher: name: Sociedade Portuguesa de Medicina Física e de Reabilitação
Year: 2023

description: .
description: Revista da Sociedade Portuguesa de Medicina Física e de Reabilitação, Vol 35, No 1 (2023): Ano 31
Proof of a conjecture by H. Dullin and R. Montgomery
Creators: name: Pinzari, Gabriella
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 34C20, 34C25, 70F05, 70F10, 37J35, 70K43

description: In the framework of the planar Euler problem in the quasi--periodic regime, the formulae of the periods available in the literature are simple only on one side of their singularity. In this paper, we complement such formulae with others, which result simpler on the other side. The derivation of such new formulae uses the Keplerian limit and complex analysis tools.
 As an application, we prove a conjecture by H. Dullin and R. Montgomery, which states that such periods, as well as their ratio, the {\it rotation number}, are monotone functions of their non--trivial first integral, at any fixed energy level.
description: 27 pages, 3 Figures
Application Experiences on a GPU-Accelerated Arm-based HPC Testbed
Creators: name: Elwasif, Wael
name: Godoy, William
name: Hagerty, Nick
name: Harris, J. Austin
name: Hernandez, Oscar
name: Joo, Balint
name: Kent, Paul
name: Lebrun-Grandie, Damien
name: Maccarthy, Elijah
name: Vergara, Veronica G. Melesse
name: Messer, Bronson
name: Miller, Ross
name: Opal, Sarp
name: Bastrakov, Sergei
name: Bussmann, Michael
name: Debus, Alexander
name: Steinger, Klaus
name: Stephan, Jan
name: Widera, Rene
name: Bryngelson, Spencer H.
name: Berre, Henry Le
name: Radhakrishnan, Anand
name: Young, Jefferey
name: Chandrasekaran, Sunita
name: Ciorba, Florina
name: Simsek, Osman
name: Spiga, Kate Clark Filippo
name: Hammond, Jeff
name: Hardy, John E. Stone. David
name: Keller, Sebastian
name: Trott, Jean-Guillaume Piccinali. Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: This paper assesses and reports the experience of ten teams working to port,validate, and benchmark several High Performance Computing applications on a novel GPU-accelerated Arm testbed system. The testbed consists of eight NVIDIA Arm HPC Developer Kit systems built by GIGABYTE, each one equipped with a server-class Arm CPU from Ampere Computing and A100 data center GPU from NVIDIA Corp. The systems are connected together using Infiniband high-bandwidth low-latency interconnect. The selected applications and mini-apps are written using several programming languages and use multiple accelerator-based programming models for GPUs such as CUDA, OpenACC, and OpenMP offloading. Working on application porting requires a robust and easy-to-access programming environment, including a variety of compilers and optimized scientific libraries. The goal of this work is to evaluate platform readiness and assess the effort required from developers to deploy well-established scientific workloads on current and future generation Arm-based GPU-accelerated HPC systems. The reported case studies demonstrate that the current level of maturity and diversity of software and tools is already adequate for large-scale production deployments.
Non-hermitian approach to decaying ultracold bosonic systems
Creators: name: Wimberger, S.
name: Parra-Murillo, C. A.
name: Kordas, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A paradigm model of modern atom optics is studied, strongly interacting ultracold bosons in an optical lattice. This many-body system can be artificially opened in a controlled manner by modern experimental techniques. We present results based on a non-hermitian effective Hamiltonian whose quantum spectrum is analyzed. The direct access to the spectrum of the metastable many-body system allows us to easily identify relatively stable quantum states, corresponding to previously predicted solitonic many-body structures.
Robust Qubit Mapping Algorithm via Double-Source Optimal Routing on Large Quantum Circuits
Creators: name: Cheng, Chin-Yi
name: Yang, Chien-Yi
name: Kuo, Yi-Hsiang
name: Wang, Ren-Chu
name: Cheng, Hao-Chung
name: Huang, Chung-Yang Ric
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Hardware Architecture (cs.AR)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Qubit Mapping is a critical aspect of implementing quantum circuits on real hardware devices. Currently, the existing algorithms for qubit mapping encounter difficulties when dealing with larger circuit sizes involving hundreds of qubits. In this paper, we introduce an innovative qubit mapping algorithm, Duostra, tailored to address the challenge of implementing large-scale quantum circuits on real hardware devices with limited connectivity. Duostra operates by efficiently determining optimal paths for double-qubit gates and inserting SWAP gates accordingly to implement the double-qubit operations on real devices. Together with two heuristic scheduling algorithms, the Limitedly-Exhausitive (LE) Search and the Shortest-Path (SP) Estimation, it yields results of good quality within a reasonable runtime, thereby striving toward achieving quantum advantage. Experimental results showcase our algorithm's superiority, especially for large circuits beyond the NISQ era. For example, on large circuits with more than 50 qubits, we can reduce the mapping cost on an average 21.75% over the virtual best results among QMAP, t|ket>, Qiskit and SABRE. Besides, for mid-size circuits such as the SABRE-large benchmark, we improve the mapping costs by 4.5%, 5.2%, 16.3%, 20.7%, and 25.7%, when compared to QMAP, TOQM, t|ket>, Qiskit, and SABRE, respectively.
description: Accepted by ACM Transactions on Quantum Computing
Harnessing nuclear spin polarization fluctuations in a semiconductor nanowire
Creators: name: Peddibhotla, P.
name: Xue, F.
name: Hauge, H. I. T.
name: Assali, S.
name: Bakkers, E. P. A. M.
name: Poggio, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Soon after the first measurements of nuclear magnetic resonance (NMR) in a condensed matter system, Bloch predicted the presence of statistical fluctuations proportional to $1/\sqrt{N}$ in the polarization of an ensemble of $N$ spins. First observed by Sleator et al., so-called "spin noise" has recently emerged as a critical ingredient in nanometer-scale magnetic resonance imaging (nanoMRI). This prominence is a direct result of MRI resolution improving to better than 100 nm^3, a size-scale in which statistical spin fluctuations begin to dominate the polarization dynamics. We demonstrate a technique that creates spin order in nanometer-scale ensembles of nuclear spins by harnessing these fluctuations to produce polarizations both larger and narrower than the natural thermal distribution. We focus on ensembles containing ~10^6 phosphorus and hydrogen spins associated with single InP and GaP nanowires (NWs) and their hydrogen-containing adsorbate layers. We monitor, control, and capture fluctuations in the ensemble's spin polarization in real-time and store them for extended periods. This selective capture of large polarization fluctuations may provide a route for enhancing the weak magnetic signals produced by nanometer-scale volumes of nuclear spins. The scheme may also prove useful for initializing the nuclear hyperfine field of electron spin qubits in the solid-state.
description: 18 pages, 5 figures
Growth and form of melanoma cell colonies
Creators: name: Baraldi, Massimiliano Maria
name: Alemi, Alexander A
name: Sethna, James P
name: Caracciolo, Sergio
name: La Porta, Caterina A M
name: Zapperi, Stefano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: We study the statistical properties of melanoma cell colonies grown in vitro by analyzing the results of crystal violet assays at different concentrations of initial plated cells and for different growth times. The distribution of colony sizes is described well by a continuous time branching process. To characterize the shape fluctuations of the colonies, we compute the distribution of eccentricities. The experimental results are compared with numerical results for models of random division of elastic cells, showing that experimental results are best reproduced by restricting cell division to the outer rim of the colony. Our results serve to illustrate the wealth of information that can be extracted by a standard experimental method such as the crystal violet assay.
Finite time analysis of temporal difference learning with linear function approximation: Tail averaging and regularisation
Creators: name: Patil, Gandharv
name: A., Prashanth L.
name: Nagaraj, Dheeraj
name: Precup, Doina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We study the finite-time behaviour of the popular temporal difference (TD) learning algorithm when combined with tail-averaging. We derive finite time bounds on the parameter error of the tail-averaged TD iterate under a step-size choice that does not require information about the eigenvalues of the matrix underlying the projected TD fixed point. Our analysis shows that tail-averaged TD converges at the optimal $O\left(1/t\right)$ rate, both in expectation and with high probability. In addition, our bounds exhibit a sharper rate of decay for the initial error (bias), which is an improvement over averaging all iterates. We also propose and analyse a variant of TD that incorporates regularisation. From analysis, we conclude that the regularised version of TD is useful for problems with ill-conditioned features.
Analysis of Training Object Detection Models with Synthetic Data
Creators: name: Vanherle, Bram
name: Moonen, Steven
name: Van Reeth, Frank
name: Michiels, Nick
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Recently, the use of synthetic training data has been on the rise as it offers correctly labelled datasets at a lower cost. The downside of this technique is that the so-called domain gap between the real target images and synthetic training data leads to a decrease in performance. In this paper, we attempt to provide a holistic overview of how to use synthetic data for object detection. We analyse aspects of generating the data as well as techniques used to train the models. We do so by devising a number of experiments, training models on the Dataset of Industrial Metal Objects (DIMO). This dataset contains both real and synthetic images. The synthetic part has different subsets that are either exact synthetic copies of the real data or are copies with certain aspects randomised. This allows us to analyse what types of variation are good for synthetic training data and which aspects should be modelled to closely match the target data. Furthermore, we investigate what types of training techniques are beneficial towards generalisation to real data, and how to use them. Additionally, we analyse how real images can be leveraged when training on synthetic images. All these experiments are validated on real data and benchmarked to models trained on real data. The results offer a number of interesting takeaways that can serve as basic guidelines for using synthetic data for object detection. Code to reproduce results is available at https://github.com/EDM-Research/DIMO_ObjectDetection.
description: published in BMVC 2022, https://bmvc2022.mpi-inf.mpg.de/833/
Kepler Monitoring of an L Dwarf I. The Photometric Period and White Light Flares
Creators: name: Gizis, John E.
name: Burgasser, Adam J.
name: Berger, Edo
name: Williams, Peter K. G.
name: Vrba, Frederick J.
name: Cruz, Kelle L.
name: Metchev, Stanimir
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report on the results of fifteen months of monitoring the nearby field L1 dwarf WISEP J190648.47+401106.8 (W1906+40) with the Kepler mission. Supporting observations with the Karl G. Jansky Very Large Array and Gemini North telescope reveal that the L dwarf is magnetically active, with quiescent radio and variable H$α$ emission. A preliminary trigonometric parallax shows that W1906+40 is at a distance of $16.35^{+0.36}_{-0.34}$ pc, and all observations are consistent with W1906+40 being an old disk star just above the hydrogen-burning limit. The star shows photometric variability with a period of 8.9 hours and an amplitude of 1.5%, with a consistent phase throughout the year. We infer a radius of $0.92 \pm 0.07 R_J$ and $\sin i > 0.57$ from the observed period, luminosity ($10^{-3.67 \pm 0.03} L_\odot$), effective temperature ($2300 \pm 75$K), and $v \sin i$ ($11.2 \pm 2.2$ km/s). The light curve may be modeled with a single large, high latitude dark spot. Unlike many L-type brown dwarfs, there is no evidence of other variations at the $\gtrsim 2%$ level, either non-periodic or transient periodic, that mask the underlying rotation period. We suggest that the long-lived surface features may be due to starspots, but the possibility of cloud variations cannot be ruled out without further multi-wavelength observations. During the Gemini spectroscopy, we observed the most powerful flare ever seen on an L dwarf, with an estimated energy of $\sim 1.6 \times 10^{32}$ ergs in white light emission. Using the Kepler data, we identify similar flares and estimate that white light flares with optical/ultraviolet energies of $10^{31}$ ergs or more occur on W1906+40 as often as 1-2 times per month.
description: accepted to ApJ
Two-gap superconductivity and decisive role of rare-earth $d$ electrons in infinite-layer nickelates
Creators: name: Li, Zhenglu
name: Louie, Steven G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a theoretical prediction of a phonon-mediated two-gap superconductivity in infinite-layer nickelates Nd$_{0.8}$Sr$_{0.2}$NiO$_2$ by performing $\textit{ab initio}$ $GW$ and $GW$ perturbation theory calculations. Electron $GW$ self-energy effects significantly alter the characters of the two-band Fermi surface and enhance the electron-phonon coupling, compared with results based on density functional theory. Solutions of the fully $\textbf{k}$-dependent anisotropic Eliashberg equations yield two dominant $s$-wave superconducting gaps - a large gap on a band of rare-earth Nd $d$ and interstitial orbital characters and a small gap on a band of transition-metal Ni $d$ character. Increasing hole doping induces a non-rigid-band response in the electronic structure, leading to a rapid drop of the superconducting $T_c$ in the overdoped regime in agreement with experiments.
description: Main text and supplementary materials
Towards a general fluid/gravity correspondence
Creators: name: Pinzani-Fokeeva, Natalia
name: Taylor, Marika
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We set up the construction of generic (d+2)-dimensional metrics corresponding to (d+1)-dimensional fluids, representing holographically the hydrodynamic regimes of the putative dual theories. We give general seed equilibrium metrics appropriate to generic bulk stress energy tensors and discuss the implications of conformal rescalings of the hypersurface on which the fluid is defined. We then show how to obtain the corresponding hydrodynamic metrics using a relativistic gradient expansion and discuss the integrability conditions of the resulting equations. The stress energy tensors of the resulting fluids, both at and away from equilibrium, satisfy a quadratic constraint. We interpret this constraint in terms of two possible equations of state for the fluid and show that only one of the two equations is physical. We illustrate our discussions with the example of the cutoff AdS fluid, for which we find the precise interpretation in terms of deformations of the UV conformal field theory. Finally we discuss the relation between the modern fluid/gravity approach taken in this paper and the earlier membrane paradigm.
description: 30 pages, 1 figure
On channels of energy for the radial linearised energy critical wave equation in the degenerate case
Creators: name: Collot, Charles
name: Duyckaerts, Thomas
name: Kenig, Carlos
name: Merle, Frank
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Channels of energy estimates control the energy of an initial data from that which it radiates outside a light cone. For the linearised energy critical wave equation they have been obtained in the radial case in odd dimensions, first in $3$ dimensions by Duyckaerts, Kenig and Merle (Camb. J. Math., 2013), then for general odd dimensions by the same authors (Comm. Math. Phys., 2020). We consider even dimensions, for which such estimates are known to fail (Côte, Kenig and Schlag, Math. Ann., 2014). We propose a weaker version of these estimates, around a single ground state as well as around a multisoliton. This allows us to prove the soliton resolution conjecture in six dimensions (Collot, Duyckaerts, Kenig and Merle, arXiv preprint 2201.01848, 2022 versions 1 and 2).
description: 36 pages. This paper is an extension of the results of Section 3 of arXiv preprint 2201.01848, version 1. The main result of this paper is then used in arXiv preprint 2201.01848, version 2, where the former Section 3 of version 1 has been removed. arXiv admin note: text overlap with arXiv:2201.01848
Dynamic loss balancing and sequential enhancement for road-safety assessment and traffic scene classification
Creators: name: Kačan, Marin
name: Ševrović, Marko
name: Šegvić, Siniša
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Road-safety inspection is an indispensable instrument for reducing road-accident fatalities contributed to road infrastructure. Recent work formalizes road-safety assessment in terms of carefully selected risk factors that are also known as road-safety attributes. In current practice, these attributes are manually annotated in geo-referenced monocular video for each road segment. We propose to reduce dependency on tedious human labor by automating recognition with a two-stage neural architecture. The first stage predicts more than forty road-safety attributes by observing a local spatio-temporal context. Our design leverages an efficient convolutional pipeline, which benefits from pre-training on semantic segmentation of street scenes. The second stage enhances predictions through sequential integration across a larger temporal window. Our design leverages per-attribute instances of a lightweight bidirectional LSTM architecture. Both stages alleviate extreme class imbalance by incorporating a multi-task variant of recall-based dynamic loss weighting. We perform experiments on the iRAP-BH dataset, which involves fully labeled geo-referenced video along 2,300 km of public roads in Bosnia and Herzegovina. We also validate our approach by comparing it with the related work on two road-scene classification datasets from the literature: Honda Scenes and FM3m. Experimental evaluation confirms the value of our contributions on all three datasets.
description: Published in IEEE Transactions on Intelligent Transportation Systems
Capacity of an infinite family of networks related to the diamond network for fixed alphabet sizes
Creators: name: Kurz, Sascha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94B65

description: We consider the problem of error correction in a network where the errors can occur only on a proper subset of the network edges. For a generalization of the so-called Diamond Network we consider lower and upper bounds for the network's (1-shot) capacity for fixed alphabet sizes.
description: 13 pages, 4 tables, 1 figure; the subsection on the special case s=2 was flawed
Physics-based model to predict the acoustic detection distance of terrestrial autonomous recording units over the diel cycle and across seasons: insights from an Alpine and a Neotropical forest
Creators: name: Haupert, Sylvain
name: Sèbe, Frédéric
name: Sueur, Jérôme
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: 1. Passive acoustic monitoring of biodiversity is growing fast, as it offers an alternative to traditional aural point count surveys, with the possibility to deploy long-term acoustic surveys in large and complex natural environments. However, there is still a clear need to evaluate how the frequency-and distancedependent attenuation of sound as well as the ambient sound level impact the acoustic detection distance of the soniferous species in natural environments over the diel cycles and across seasons. This is of great importance to avoid pseudoreplication and to provide relevant biodiversity indicators, including species richness, species abundance and species density. 2. To address the issue of detection distance, we tested a field-based protocol in a Neotropical rainforest (French Guiana, France) and in an Alpine coniferous forest (Jura, France). This standardized and repeatable method consists in a recording session of the ambient sound directly followed by an experiment using a calibrated white noise sound broadcast at different positions along a 100 m linear transect. We then used acoustic laws to reveal the basic physics behind sound propagation attenuation. 3. We demonstrate that habitat attenuation in two different kinds of forests can be modelled by an exponential decay law with a linear dependence on frequency and distance. We also report that habitat attenuation, as first approximation, can be summarized by a single value, the coefficient of attenuation of the habitat. 4. Finally, we show that the detection distance can be predicted knowing the contribution of each attenuation factor, the coefficient of attenuation of the habitat, the ambient sound pressure level and the amplitude and frequency bandwidth characteristics of the transmitted sound. We show that the detection 1 distance mostly depends on the ambient sound and may vary by a factor of up to 5 over the diel cycle and across seasons. These results reinforce the need to take into account the variation of the detection distance when performing passive acoustic surveys and producing reliable biodiversity indicators.
description: Methods in Ecology and Evolution, 2022
title: Evaluation des modèles 2D d’homogénéisation pour le contrôle non destructif ultrasonore du béton
Creators: name: Khalid, Nouhayla
name: Darmon, Michel
name: Chaix, Jean-François
Publisher: name: Academic Journal of Civil Engineering
Year: 2023

description: La simulation du contrôle non destructif (CND) par ultrasons joue un rôle important dans les évaluations et contrôles des structures en béton. Le béton est un milieu composite : la présence d’hétérogénéités conduit à la dispersion et à l’atténuation des ondes ultrasonores. Cela a un effet important sur le contrôle. Par conséquent, il est important de modéliser avec précision l’atténuation des ondes due à la diffusion par les différents composants présents dans le béton (granulats, porosités, microfissures…). Les méthodes ultrasonores classiquement utilisées reposent sur l’étude de l’onde cohérente caractérisée par sa vitesse et son atténuation. Cette onde peut être simulée à l’aide de modèles numériques ou analytiques. Les modèles numériques sont plus performants mais très couteux dans le cas 3D, et le besoin de mettre en place une simulation rapide de contrôles conduit à une nécessité d’améliorer les modèles analytiques 3D simplifiés, où le champ ultrasonore total dépend fortement des positions des obstacles. En guise d’amélioration des modèles analytiques, on cherche à étudier les effets de la corrélation des positions des diffuseurs. Dans le présent travail, nous proposons d’évaluer précisément le modèle d’homogénéisation existant le plus adapté à une forte concentration de diffuseurs. Une comparaison entre ce modèle et un code d’éléments finis 2D en cours de développement dans le logiciel de simulation CIVA NDT est présentée.
description: Academic Journal of Civil Engineering, Vol 41 No 4 (2023): Special Issue - Diagnobéton 2023
Build Electronic Arabic Lexicon
Creators: name: El-Abbadi, Nidhal
name: Khdhair, Ahmed Nidhal
name: Al-Nasrawi, Adel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: There are many known Arabic lexicons organized on different ways, each of them has a different number of Arabic words according to its organization way. This paper has used mathematical relations to count a number of Arabic words, which proofs the number of Arabic words presented by Al Farahidy. The paper also presents new way to build an electronic Arabic lexicon by using a hash function that converts each word (as input) to correspond a unique integer number (as output), these integer numbers will be used as an index to a lexicon entry.
description: 4 pages
Localization and centrality in networks
Creators: name: Martin, Travis
name: Zhang, Xiao
name: Newman, M. E. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Social and Information Networks (cs.SI)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Eigenvector centrality is a common measure of the importance of nodes in a network. Here we show that under common conditions the eigenvector centrality displays a localization transition that causes most of the weight of the centrality to concentrate on a small number of nodes in the network. In this regime the measure is no longer useful for distinguishing among the remaining nodes and its efficacy as a network metric is impaired. As a remedy, we propose an alternative centrality measure based on the nonbacktracking matrix, which gives results closely similar to the standard eigenvector centrality in dense networks where the latter is well behaved, but avoids localization and gives useful results in regimes where the standard centrality fails.
description: 5 pages, 1 figure
title: Historische Nachricht von dem ehemaligen Nonnen-Closter Allendorff; 1757
title: auch einigen ohnweit desselben, gelegenen Orten, als Saltzungen, Ringelstein, Ottewinden, Wackenhof, Flachsland, Pfaffenberg, Creutzberg, Einhauß, Ruhla, Möhra, Ettenhaußen, und Eccardshaußen, woselbst das Closter Güter und Zinßen gehabt hat
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2009

description: In Fraktur
Two-point correlation function for Dirichlet L-functions
Creators: name: Bogomolny, E.
name: Keating, J. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The two-point correlation function for the zeros of Dirichlet L-functions at a height E on the critical line is calculated heuristically using a generalization of the Hardy-Littlewood conjecture for pairs of primes in arithmetic progression. The result matches the conjectured Random-Matrix form in the limit as $E\rightarrow\infty$ and, importantly, includes finite-E corrections. These finite-E corrections differ from those in the case of the Riemann zeta-function, obtained in (1996 Phys. Rev. Lett. 77 1472), by certain finite products of primes which divide the modulus of the primitive character used to construct the L-function in question.
description: 10 pages
Discovery of a New Member of the Inner Oort Cloud from The Next Generation Virgo Cluster Survey
Creators: name: Chen, Ying-Tung
name: Kavelaars, J. J.
name: Gwyn, Stephen
name: Ferrarese, Laura
name: Côté, Patrick
name: Jordán, Andrés
name: Suc, Vincent
name: Cuillandre, Jean-Charles
name: Ip, Wing-Huen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of 2010 GB$_{174}$, a likely new member of the Inner Oort Cloud (IOC). 2010 GB$_{174}$ is one of 91 Trans Neptunian Objects (TNOs) and Centaurs discovered in a 76 deg$^2$ contiguous region imaged as part of the Next Generation Virgo Cluster Survey (NGVS) --- a moderate ecliptic latitude survey reaching a mean limiting magnitude of $g^\prime \simeq 25.5$ --- using MegaPrime on the 3.6m Canada France Hawaii Telescope. 2010 GB$_{174}$ is found to have an orbit with semi-major axis $a\simeq350.8$ AU, inclination $i \simeq 21.6^\circ$ and pericentre $q\sim48.5$ AU. This is the second largest perihelion distance among known solar system objects. Based on the sky coverage and depth of the NGVS, we estimate the number of IOC members with sizes larger than 300 km ($H_V \le 6.2$ mag) to be $\simeq 11\,000$. A comparison of the detection rate from the NGVS and the PDSSS (a characterized survey that `re-discovered' the IOC object Sedna) gives, for an assumed a power-law LF for IOC objects, a slope of $α\simeq 0.7 \pm 0.2$, with only two detections in this region this slope estimate is highly uncertain.
description: 20 pages, 3 figures, 1 table. Accepted for publication in The Astrophysical Journal Letters
RNS derivation of N-point disk amplitudes from the revisited S-matrix approach
Creators: name: Barreiro, Luiz Antonio
name: Medina, Ricardo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the past year, in arXiv:1208.6066 we proposed a revisited S-matrix approach to efficiently find the bosonic terms of the open superstring low energy effective lagrangian (OSLEEL). This approach allows to compute the ${α'}^N$ terms of the OSLEEL using open superstring $n$-point amplitudes in which $n$ is very much lower than $(N+2)$ (which is the order of the required amplitude to obtain those ${α'}^N$ terms by means of the conventional S-matrix approach). In this work we use our revisited S-matrix approach to examine the structure of the scattering amplitudes, arriving at a closed form for them. This is a RNS derivation of the formula first found by Mafra, Schlotterer and Stieberger in arXiv:1106.2645, using the Pure Spinor formalism. We have succeeded doing this for the 5, 6 and 7-point amplitudes. In order to achieve these results we have done a careful analysis of the kinematical structure of the amplitudes, finding as a by-product a purely kinematical derivation of the BCJ relations (for N=4, 5, 6 and 7). Also, following the spirit of the revisited S-matrix approach, we have found the $α'$ expansions for these amplitudes up to ${α'}^6$ order in some cases, by only using the well known open superstring 4-point amplitude, cyclic symmetry and tree level unitarity: we have not needed to compute any numerical series or any integral involving polylogarithms, at any moment.
description: 77 pages, 3 figures
title: Defining Infidelity and Identifying Offending Spouses
Creators: name: tang, yabin
Publisher: name: University of Kentucky Libraries
Year: 2019

description: Research on infidelity has suffered from inconsistency in how infidelity has been operationalized across studies. This study was designed to advance methodological considerations for defining infidelity and identifying offending spouses. A subjective definition of infidelity was obtained from each respondent via both closed- and open-ended items. The open-ended responses were applied to explore the definition of infidelity. Additionally, an indirect questioning method was adopted to identify offending spouses according to their own subjective definitions of cheating and test the effectiveness of this approach relative to direct questioning for identifying offending spouses. Furthermore, gender differences in acknowledging infidelity through both direct and indirect approaches in general as well as across the four self-defined categorical infidelity were examined. A community sample of 465 married or divorced individuals anonymously completed the survey via MTurk. Results showed two defining characteristics of infidelity that cut across modes of infidelity (sexual, emotional, computer-mediated, and solitary) were that infidelity occurs outside the relationship and without consent. The definition of infidelity of infidelity provided in response to an open-ended inquiry tended to be shorter among offending spouses—especially male offending spouses—than among non-offending spouses. More offending spouses were found via the indirect (42.9%) approach than the direct approach (12.7%), and more men than women acknowledged engaging in infidelity behaviors according to both the direct (16.6% vs. 9.1%) and indirect (48.2% vs. 38.0%) approaches. That said, gender-based statistical differences in propensity to commit self-defined infidelity were only found in sexual and computer-mediated forms of infidelity; propensity to commit self-defined emotional and solitary infidelity did not statistically differ between men and women; in all cases, however, gender differences were small. Results suggested that the indirect approach is better than direct questioning for identifying infidelity behaviors; the indirect approach elicited less social desirability bias. Implications for research and clinical practice are provided.
description: Copyright © Yabin Tang 2019
title: Comparison of the Humoral Immune Response following Both Bacterial Challenge and RNAi of Major Factors on Proliferation of Bartonella quintana in the Human Louse
Creators: name: Zina, Jake
Publisher: name: University of Massachusetts Amherst
Year: 2023

description: Human body lice, Pediculus humanus humanus, and head lice, Pediculus humanus capitis, have been hematophagous ectoparasites of humans for thousands of years. Despite being ecotypes, only body lice are known to transmit bacterial diseases to humans, and it appears that lower humoral and cellular immune responses allow body lice to possess a higher vector competence. We previously observed that the transcription level of the defensin 1 gene was up-regulated only in head lice following oral challenge of Bartonella quintana, a causative agent of trench fever, and also that body lice excreted more viable B. quintana in their feces. In this study, we first investigated this differential immune response by performing RNAi to knockdown defensin 1 by dsRNA injection. B. quintana was orally infected 72 h after injection and proliferation was compared at 2 hours (day 0) and day 4 post-infection. At day 0, bacterial cell numbers increased 1.5-fold in defensin 1 (Def1(-)) knocked down head lice compared with non-knocked down, pQE30-dsRNA injected, head lice control. At day 4, Def1(-) knocked down head lice had 2.55-fold more bacterial cells than control head lice and 1.65-fold greater than body lice, indicating that defensin 1 was active in reducing B. quintana cell number in non-knocked down head lice. Second, the levels of cytotoxic reactive oxygen species (ROS) generated by the epithelial cells of the alimentary tract were measured using two general indictors of ROS in both body and head lice at day 1 and day 4 following B. quintana challenge. Challenged body lice showed a 42% and 34% increase in ROS, whereas head lice showed a 70% and 22% increase at day 1 using CM-H2DCFDA and HPF as general indicators, respectively. On day 4, all challenged lice showed similar ROS levels except for body lice which maintained their ROS levels (40% increase using CM-H2DCFDA). Head lice are likely to have multiple immune and/or non-immune factors that suppress B. quintana proliferation, and the production of sustained ROS levels and/or the single knockdown of Defensin 1 is not enough to increase B. quintana proliferation in head lice to that seen in body lice.
title: Study of Factors Affecting Distribution System PV Hosting Capacity
Creators: name: Li, Fanxun
Publisher: name: University of Kentucky Libraries
Year: 2019

description: As renewable energy plays an increasingly important role in the power system, the addition of PV systems to the distribution network has become a major trend in the current power system development. However, if a PV system with excessive capacity is added to the distribution network, voltage problems may occur in the system. Hence, it is important to determine the capacity of the PV system that can be added at the distribution system.
The thesis aims to identify the major factors that affect the PV hosting capacity of distribution systems. The thesis studies various scenarios for the IEEE-123 test network PV system and evaluates the PV hosting capacity of the distribution system based on simulation tools including Matlab and Opendss software.
description: Copyright © Fanxun Li 2019
title: Length-weight relationships for 71 reef and bottomfish species from Tutuila and Aunu'u, American Samoa
Creators: name: Matthews, Toby
name: Ochavillo, Domingo
name: Felise, Sean
name: Letalie, Teejay
name: Letuane, Mika
name: Schuster, Ekueta
name: Soonaolo, Auva'a
name: Tofaeono, Saolotoga
name: Tua, Alama
name: Tuilagi, Faleselau
Publisher: name: National Marine Fisheries Service (U.S.). Pacific Islands Fisheries Science Center (U.S.)
Year: 2019

description: PIFSC Administrative Report H ; 19-03
title: Length-weight relationships for 83 reef and bottomfish species from the Commonwealth of the Northern Mariana Islands
Creators: name: Matthews, Toby
name: Gourley, John
name: Flores, Anthony
name: Ramon, Manny
name: Trianni, Michael
Publisher: name: National Marine Fisheries Service (U.S.). Pacific Islands Fisheries Science Center (U.S.)
Year: 2019

description: PIFSC Administrative Report H ; 19-02