cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Monte Carlo analysis of critical phenomenon of the Ising model on memory stabilizer structures
Creators: name: Viteri, C. Ricardo
name: Tomita, Yu
name: Brown, Kenneth R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We calculate the critical temperature of the Ising model on a set of graphs representing a concatenated three-bit error-correction code. The graphs are derived from the stabilizer formalism used in quantum error correction. The stabilizer for a subspace is defined as the group of Pauli operators whose eigenvalues are +1 on the subspace. The group can be generated by a subset of operators in the stabilizer, and the choice of generators determines the structure of the graph. The Wolff algorithm, together with the histogram method and finite-size scaling, is used to calculate both the critical temperature and the critical exponents of each structure. The simulations show that the choice of stabilizer generators, both the number and the geometry, has a large effect on the critical temperature.
description: 7 pages, 6 figures, 5 tables
Holographic Ricci dark energy in Randall-Sundrum braneworld: Avoidance of big rip and steady state future
Creators: name: Feng, Chao-Jun
name: Zhang, Xin
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the holographic Ricci dark energy (RDE) model, the parameter $α$ plays an important role in determining the evolutionary behavior of the dark energy. When $α<1/2$, the RDE will exhibit a quintom feature, i.e., the equation of state of dark energy will evolve across the cosmological constant boundary $w=-1$. Observations show that the parameter $α$ is indeed smaller than 1/2, so the late-time evolution of RDE will be really like a phantom energy. Therefore, it seems that the big rip is inevitable in this model. On the other hand, the big rip is actually inconsistent with the theoretical framework of the holographic model of dark energy. To avoid the big rip, we appeal to the extra dimension physics. In this Letter, we investigate the cosmological evolution of the RDE in the braneworld cosmology. It is of interest to find that for the far future evolution of RDE in a Randall-Sundrum braneworld, there is an attractor solution where the steady state (de Sitter) finale occurs, in stead of the big rip.
description: 6 pages, 4 figures; v2: discussions added, accepted for publication in Phys. Lett. B; v3: published version
Universal Response of Quantum Systems with Chaotic Dynamics
Creators: name: Wisniacki, Diego A.
name: Ares, Natalia
name: Vergini, Eduardo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The prediction of the response of a closed system to external perturbations is one of the central problems in quantum mechanics, and in this respect, the local density of states (LDOS) provides an in- depth description of such a response. The LDOS is the distribution of the overlaps squared connecting the set of eigenfunctions with the perturbed one. Here, we show that in the case of closed systems with classically chaotic dynamics, the LDOS is a Breit-Wigner distribution under very general perturbations of arbitrary high intensity. Consequently, we derive a semiclassical expression for the width of the LDOS which is shown to be very accurate for paradigmatic systems of quantum chaos. This Letter demonstrates the universal response of quantum systems with classically chaotic dynamics.
description: 4 pages, 3 figures
Agora: Empowering Research and Education in University Alliances with a Digital Campus Acceleration Tool
Creators: name: Alcober, Jesus
name: Lopez Rubio, Juan
name: Roma, Alba
Publisher: name: Zenodo
Year: 2024

description: In this TechMeetUp session hosted by Unite! Cm. 2 Digital Campus, the focus will be on the topic of "Agora," a digital campus acceleration tool designed to empower research and education within university alliances. This presentation delves into the functionalities, benefits, and potential impact of Agora on collaborative academic endeavours.
A Spectacular H$α$ Complex in Virgo: Evidence for a Collision Between M86 and NGC 4438 and Implications for Collisional ISM Heating of Ellipticals
Creators: name: Kenney, J. D. P.
name: Tal, T.
name: Crowl, H. H.
name: Feldmeier, J.
name: Jacoby, G. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Deep wide-field H$α$+[NII] imaging around the Virgo cluster giant elliptical galaxy M86 reveals a highly complex and disturbed ISM/ICM. The most striking feature is a set of H$α$ filaments which clearly connect M86 with the nearby disturbed spiral NGC 4438 (23$'$=120 kpc projected away), providing strong evidence for a previously unrecognized collision between them. Spectroscopy of selected regions show a fairly smooth velocity gradient between M86 and NGC 4438, consistent with the collision scenario. Such a collision would impart significant energy into the ISM of M86, probably heating the gas and acting to prevent the gas from cooling to form stars. We propose that cool gas stripped from NGC 4438 during the collision and deposited in its wake is heated by shocks, ram pressure drag, or thermal conduction, producing most of the H$α$ filaments. Some H$α$ filaments are associated with the well-known ridge of bright X-ray emission to the NW of the nucleus, suggesting that the collision is responsible for peculiarities of M86 previously ascribed to other effects. M86 is radio-quiet, thus AGN heating is unlikely to play a significant role. The M86 system has implications for understanding the role of gravitational interactions in the heating of the ISM in ellipticals, and how collisions in clusters transform galaxies.
description: 6 pages, 2 figures. For high-resolution images, see http://www.astro.yale.edu/tal/research/index.html
MAKSUD SHEIKHZADA CHARMED TWO NATIONS
Creators: name: Shermatov, Dilyorbek
name: Amanlikova, Nafisa
Publisher: name: Zenodo
Year: 2023

description: Language teaching and learning programs provide students the opportunity to discover how languages are learned and how they may be most-effectively taught. These programs allow students to consider questions including the subsequent: What theoretical troubles underline the teaching and studying of language?
An Optimal Transport Approach for Selecting a Representative Subsample with Application in Efficient Kernel Density Estimation
Creators: name: Zhang, Jingyi
name: Meng, Cheng
name: Yu, Jun
name: Zhang, Mengrui
name: Zhong, Wenxuan
name: Ma, Ping
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified

description: Subsampling methods aim to select a subsample as a surrogate for the observed sample. Such methods have been used pervasively in large-scale data analytics, active learning, and privacy-preserving analysis in recent decades. Instead of model-based methods, in this article, we study model-free subsampling methods, which aim to identify a subsample, that is, not confined by model assumptions. Existing model-free subsampling methods are usually built upon clustering techniques or kernel tricks. Most of these methods suffer from either a large computational burden or a theoretical weakness. In particular, the theoretical weakness is that the empirical distribution of the selected subsample may not necessarily converge to the population distribution. Such computational and theoretical limitations hinder the broad applicability of model-free subsampling methods in practice. We propose a novel model-free subsampling method by using optimal transport techniques. Moreover, we develop an efficient subsampling algorithm, that is, adaptive to the unknown probability density function. Theoretically, we show the selected subsample can be used for efficient density estimation by deriving the convergence rate for the proposed subsample kernel density estimator. We also provide the optimal bandwidth for the proposed estimator. Numerical studies on synthetic and real-world datasets demonstrate the performance of the proposed method is superior.
Gauge fixing in the tensor model and emergence of local gauge symmetries
Creators: name: Sasakura, Naoki
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The tensor model can be regarded as theory of dynamical fuzzy spaces, and gives a way to formulate gravity on fuzzy spaces. It has recently been shown that the low-lying fluctuations around the Gaussian background solutions in the tensor model agree correctly with the metric fluctuations on the flat spaces with general dimensions in the general relativity. This suggests that the local gauge symmetry (the symmetry of local translations) is also emergent around these solutions. To systematically study this possibility, I apply the BRS gauge fixing procedure to the tensor model. The ghost kinetic term is numerically analyzed, and it has been found that there exist some massless trajectories of ghost modes, which are clearly separated from the other higher ghost modes. Comparing with the corresponding BRS gauge fixing in the general relativity, these ghost modes forming the massless trajectories in the tensor model are shown to be identical to the reparametrization ghosts in the general relativity.
description: 18 pages, 5 figures
Lifetime of metastable states and suppression of noise in Interdisciplinary Physical Models
Creators: name: Spagnolo, B.
name: Dubkov, A. A.
name: Pankratov, A. L.
name: Pankratova, E. V.
name: Fiasconaro, A.
name: Ochab-Marcinek, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Transient properties of different physical systems with metastable states perturbed by external white noise have been investigated. Two noise-induced phenomena, namely the noise enhanced stability and the resonant activation, are theoretically predicted in a piece-wise linear fluctuating potential with a metastable state. The enhancement of the lifetime of metastable states due to the noise, and the suppression of noise through resonant activation phenomenon will be reviewed in models of interdisciplinary physics: (i) dynamics of an overdamped Josephson junction; (ii) transient regime of the noisy FitzHugh-Nagumo model; (iii) population dynamics.
description: 25 pages, 10 figures, Presented at the 19th Marian Smoluchowski Symposium on Statistical Physics, Krakow, Poland, May 14-17, 2006
The div-curl lemma for sequences whose divergence and curl are compact in W^{-1,1}
Creators: name: Conti, Sergio
name: Dolzmann, Georg
name: Müller, Stefan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: It is shown that $u_k \cdot v_k$ converges weakly to $u\cdot v$ if $u_k\weakto u$ weakly in $L^p$ and $v_k\weakly v$ weakly in $L^q$ with $p, q\in (1,\infty)$, $1/p+1/q=1$, under the additional assumptions that the sequences $\Div u_k$ and $\curl v_k$ are compact in the dual space of $W^{1,\infty}_0$ and that $u_k\cdot v_k$ is equi-integrable. The main point is that we only require equi-integrability of the scalar product $u_k\cdot v_k$ and not of the individual sequences.
Ground states and formal duality relations in the Gaussian core model
Creators: name: Cohn, Henry
name: Kumar, Abhinav
name: Schuermann, Achill
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Metric Geometry (math.MG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study dimensional trends in ground states for soft-matter systems. Specifically, using a high-dimensional version of Parrinello-Rahman dynamics, we investigate the behavior of the Gaussian core model in up to eight dimensions. The results include unexpected geometric structures, with surprising anisotropy as well as formal duality relations. These duality relations suggest that the Gaussian core model possesses unexplored symmetries, and they have implications for a broad range of soft-core potentials.
description: 7 pages, 1 figure, appeared in Physical Review E (http://pre.aps.org)
Additional file 1 of Hospital mortality of blunt abdominal aortic injury (BAAI): a systematic review and meta-analysis
Creators: name: Li, Mingxuan
name: Yan, Yu
name: Wang, Chaonan
name: Tu, Haixia
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. PRISMA 2020 checklist.
A Theory of Dark Matter
Creators: name: Arkani-Hamed, Nima
name: Finkbeiner, Douglas P.
name: Slatyer, Tracy R.
name: Weiner, Neal
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose a comprehensive theory of dark matter that explains the recent proliferation of unexpected observations in high-energy astrophysics. Cosmic ray spectra from ATIC and PAMELA require a WIMP with mass M_chi ~ 500 - 800 GeV that annihilates into leptons at a level well above that expected from a thermal relic. Signals from WMAP and EGRET reinforce this interpretation. Taken together, we argue these facts imply the presence of a GeV-scale new force in the dark sector. The long range allows a Sommerfeld enhancement to boost the annihilation cross section as required, without altering the weak scale annihilation cross section during dark matter freezeout in the early universe. If the dark matter annihilates into the new force carrier, phi, its low mass can force it to decay dominantly into leptons. If the force carrier is a non-Abelian gauge boson, the dark matter is part of a multiplet of states, and splittings between these states are naturally generated with size alpha m_phi ~ MeV, leading to the eXciting dark matter (XDM) scenario previously proposed to explain the positron annihilation in the galactic center observed by the INTEGRAL satellite. Somewhat smaller splittings would also be expected, providing a natural source for the parameters of the inelastic dark matter (iDM) explanation for the DAMA annual modulation signal. Since the Sommerfeld enhancement is most significant at low velocities, early dark matter halos at redshift ~10 potentially produce observable effects on the ionization history of the universe, and substructure is more detectable than with a conventional WIMP. Moreover, the low velocity dispersion of dwarf galaxies and Milky Way subhalos can greatly increase the substructure annihilation signal.
description: 22 pages, 7 figures, accepted by PRD. Version 2 corrects two equations and clarifies saturation of Sommerfeld enhancement at low velocity. Version 3 is the final journal version
Additional file 2 of Hospital mortality of blunt abdominal aortic injury (BAAI): a systematic review and meta-analysis
Creators: name: Li, Mingxuan
name: Yan, Yu
name: Wang, Chaonan
name: Tu, Haixia
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file2. Search terms forliteratures.
Algebraic K-theory over the infinite dihedral group: a controlled topology approach
Creators: name: Davis, James F.
name: Quinn, Frank
name: Reich, Holger
Publisher: name: arXiv
Year: 2010
Subjects: subject: K-Theory and Homology (math.KT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57Q10, 16E20

description: We use controlled topology applied to the action of the infinite dihedral group on a partially compactified plane and deduce two consequences for algebraic K-theory. The first is that the family in the K-theoretic Farrell-Jones conjecture can be reduced to only those virtually cyclic groups which admit a surjection with finite kernel onto a cyclic group. The second is that the Waldhausen Nil groups for a group which maps epimorphically onto the infinite dihedral group can be computed in terms of the Farrell-Bass Nil groups of the index two subgroup which maps surjectively to the infinite cyclic group.
description: Accepted for publication by the Journal of Topology, 23 pages, proof of Lemma 4.1 simplified
Additional file 10 of Transcriptomic analysis of flower opening response to relatively low temperatures in Osmanthus fragrans
Creators: name: Fu, Jianxin
name: Zhang, Chao
name: Liu, Yucheng
name: Pang, Tianhong
name: Dong, Bin
name: Gao, Xiaoyue
name: Zhu, Yimin
name: Zhao, Hongbo
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 10: Table S7.Pearson correlation coefficients of six samples each with three biological replicates.
Nonlinear screening of charges induced in graphene by metal contacts
Creators: name: Khomyakov, P. A.
name: Starikov, A. A.
name: Brocks, G.
name: Kelly, P. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: To understand the band bending caused by metal contacts, we study the potential and charge density induced in graphene in response to contact with a metal strip. We find that the screening is weak by comparison with a normal metal as a consequence of the ultra-relativistic nature of the electron spectrum near the Fermi energy. The induced potential decays with the distance from the metal contact as x^{-1/2} and x^{-1} for undoped and doped graphene, respectively, breaking its spatial homogeneity. In the contact region the metal contact can give rise to the formation of a p-p', n-n', p-n junction (or with additional gating or impurity doping, even a p-n-p' junction) that contributes to the overall resistance of the graphene sample, destroying its electron-hole symmetry. Using the work functions of metal-covered graphene recently calculated by Khomyakov et al. [Phys. Rev. B 79, 195425 (2009)] we predict the boundary potential and junction type for different metal contacts.
description: 6 pages, 3 figures; v3: revision of the text, supplementary material is added. Accepted for publication in Physical Review B
BOSHLANG'ICH SINFLARDA BADIIY-QURISH YASASH MASHG'ULOTLARI METODIKASINING O'ZIGA XOS XUSUSIYATLARI.
Creators: name: Buronov, Rauf
Publisher: name: Zenodo
Year: 2023

description: O‘shbu maqolada boshlang‘ich sinflarda olib borilayotgan tasviriy san’at darslarida badiiy qurish-yasash mashg‘ulotlarining mazmuni, mohiyati va uni o‘tkazish jarayoni hamda sohaga oid kerakli tavsiyalar bayon etilgan.
LHC Signals for a SuperUnified Theory of Dark Matter
Creators: name: Arkani-Hamed, Nima
name: Weiner, Neal
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A new theory of WIMP Dark Matter has been proposed, motivated directly by striking Data from the PAMELA and ATIC collaborations. The WIMP is taken to be charged under a hidden gauge symmetry G_Dark, broken near the GeV scale; this also provides the necessary ingredients for the "exciting" and "inelastic" Dark Matter interpretations of the INTEGRAL and DAMA signals. In this short note we point out the consequences of the most straightforward embedding of this simple picture within low-energy SUSY, in which G_Dark breaking at the GeV scale arises naturally through radiative corrections, or Planck-suppressed operators. The theory predicts major additions to SUSY signals at the LHC. A completely generic prediction is that G_Dark particles can be produced in cascade decays of MSSM superpartners, since these end with pairs of MSSM LSP's that in turn decay into the true LSP and other particles in the dark sector. In turn, the lightest GeV-scale dark Higgses and gauge bosons eventually decay back into light SM states, and dominantly into leptons. Therefore, a large fraction of all SUSY events will contain at least two ``lepton jets'': collections of n>= 2 leptons, with small angular separations and GeV scale invariant masses. Furthermore, if the Dark Matter sector is directly charged under the Standard Model, the success of gauge coupling unification implies the presence of new long-lived colored particles that can be copiously produced at the LHC.
description: v2 references updated; added discussion of B-factory searches
Direct Measurement of Piezoelectric Response around Ferroelectric Domain Walls in Crystals with Engineered Domain Configuration
Creators: name: Guo, Haiyan
name: Bokov, Alexei A.
name: Ye, Zuo-Guang
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the first investigation of the piezoelectric response on a nanoscale in the poled ferroelectric crystals with engineered configuration of domains. Piezoresponse force microscopy of tetragonal 0.63PMN-0.37PT relaxor-based ferroelectric crystals reviled that the d33 piezoelectric coefficient is significantly reduced within the distance of about 1 um from the uncharged engineered domain wall. This finding is essential for understanding the mechanisms of the giant piezoresponse in relaxor-based crystals and for designing new piezoelectric materials.
The complete chloroplast genome sequence of Sedum bulbiferum (Crassulaceae)
Creators: name: Deng, Zijie
name: Huang, Kerui
name: Xie, Peng
name: Xie, Suisui
name: Zhang, Ningyun
name: Yin, Hanbin
name: Ping, Mo
name: Wang, Yun
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: Sedum bulbiferum is a traditional medicinal plant in China, with few reports on its chloroplast genome. In this study, the chloroplast genome of Sedum bulbiferum was characterized, and its phylogenetic position among other closely related species was studied. The results showed that the full length of the chloroplast genome was 150,074 bp, containing a large single-copy (LSC) region and a small single-copy (SSC) region of 81,730 and 16,726 bp, respectively, as well as two inverted repeat regions (IRs) of 25,809 bp like other plants. A total of 128 genes were found, including 83 protein-coding genes, 37 tRNA genes, and eight rRNA genes. Phylogenetic analysis showed that Sedum bulbiferum is closely related to Sedum emarginatum, Sedum alfredii, Sedum tricarpum, Sedum plumbizincicola, and Sedum sarmentosum.
DON: Deep Learning and Optimization-Based Framework for Detection of Novel Coronavirus Disease Using X-ray Images
Creators: name: Comp Life Sci, Interdis Sci
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310706
subject: Virology
classificationCode: 310702
subject: Infectious agents

description: In the hospital, a limited number of COVID-19 test kits are available due to the spike in cases every day. For this reason, a rapid alternative diagnostic option should be introduced as an automated detection method to prevent COVID-19 spreading among individuals. This article proposes multi-objective optimization and a deep-learning methodology for the detection of infected coronavirus patients with X-rays. J48 decision tree method classifies the deep characteristics of affected X-ray corona images to detect the contaminated patients effectively. Eleven different convolutional neuronal network-based (CNN) models were developed in this study to detect infected patients with coronavirus pneumonia using X-ray images (AlexNet, VGG16, VGG19, GoogleNet, ResNet18, ResNet500, ResNet101, InceptionV3, InceptionResNetV2, DenseNet201 and XceptionNet). In addition, the parameters of the CNN profound learning model are described using an emperor penguin optimizer with several objectives (MOEPO). A broad review reveals that the proposed model can categorise the X-ray images at the correct rates of precision, accuracy, recall, specificity and F1-score. Extensive test results show that the proposed model outperforms competitive models with well-known efficiency metrics. The proposed model is, therefore, useful for the real-time classification of X-ray chest images of COVID-19 disease.
Using single top rapidity to measure V_td, V_ts, V_tb at hadron colliders
Creators: name: Aguilar-Saavedra, J. A.
name: Onofre, A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Single top production processes are usually regarded as the ones in which V_tb can be directly measured at hadron colliders. We show that the analysis of the single top rapidity distribution in t-channel and tW production can also set direct limits on V_td. At LHC with 10 fb^-1 at 14 TeV the combined limits on V_td may be reduced by almost a factor of two when the top rapidity distribution is used. This also implies that the limits on V_tb can also be reduced by 15%, since both parameters as well as V_ts must be simultaneously obtained from a global fit to data. At Tevatron the explotation of this distribution would require very high statistics.
description: LaTeX 19 pages, 48 PS figures. A section added with estimations of systematics, LO/NLO comparison and a fast detector simulation. Final version to appear in PRD
Non-critical squeezing in 2-transverse-mode optical parametric oscillators
Creators: name: Navarrete-Benlloch, Carlos
name: Romanelli, Alejandro
name: Roldán, Eugenio
name: de Valcárcel, Germán J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article we explore the quantum properties of a degenerate optical parametric oscillator when it is tuned to the first family of transverse modes at the down converted frequency.
Fixed Points of Nonlinear Sigma Models in d>2
Creators: name: Codello, A.
name: Percacci, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using Wilsonian methods, we study the renormalization group flow of the Nonlinear Sigma Model in any dimension $d$, restricting our attention to terms with two derivatives. At one loop we always find a Ricci flow. When symmetries completely fix the internal metric, we compute the beta function of the single remaining coupling, without any further approximation. For $d>2$ and positive curvature, there is a nontrivial fixed point, which could be used to define an ultraviolet limit, in spite of the perturbative nonrenormalizability of the theory. Potential applications are briefly mentioned.
description: 9 pages
An inverse theorem for the Gowers U^4 norm
Creators: name: Green, Ben
name: Tao, Terence
name: Ziegler, Tamar
Publisher: name: arXiv
Year: 2009
Subjects: subject: Number Theory (math.NT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We prove the so-called inverse conjecture for the Gowers U^{s+1}-norm in the case s = 3 (the cases s < 3 being established in previous literature). That is, we establish that if f : [N] -> C is a function with |f(n)| <= 1 for all n and || f ||_{U^4} >= δthen there is a bounded complexity 3-step nilsequence F(g(n)Γ) which correlates with f. The approach seems to generalise so as to prove the inverse conjecture for s >= 4 as well, and a longer paper will follow concerning this. By combining this with several previous papers of the first two authors one obtains the generalised Hardy-Littlewood prime-tuples conjecture for any linear system of complexity at most 3. In particular, we have an asymptotic for the number of 5-term arithmetic progressions p_1 < p_2 < p_3 < p_4 < p_5 <= N of primes.
description: 49 pages, to appear in Glasgow J. Math. Fixed a problem with the file (the paper appeared in duplicate)
Thermal expansion of the spin-1/2 Heisenberg-chain compound Cu(C$_4$H$_4$N$_2$)(NO$_3$)$_2$
Creators: name: Rohrkamp, J.
name: Phillips, M. D.
name: Turnbull, M. M.
name: Lorenz, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Compounds containing magnetic subsystems representing simple model spin systems with weak magnetic coupling constants are ideal candidates to test theoretical predictions for the generic behavior close to quantum phase transitions. We present measurements of the thermal expansion and magnetostriction of the spin-1/2-chain compound copper pyrazine dinitrate Cu(C$_4$H$_4$N$_2$)(NO$_3$)$_2$. Of particular interest is the low-temperature thermal expansion close to the saturation field $H_c \simeq 13.9 \mathrm{T}$, which defines a quantum phase transition from the gapless Luttinger liquid state to the fully saturated state with a finite excitation gap. We observe a sign change of the thermal expansion for the different ground states, and at the quantum critical point $H_c$ the low-temperature expansion approaches a $1/\sqrt{T}$ divergence. Thus, our data agree very well with the expected quantum critical behaviour.
description: 4 pages, 3 figures; to appear in the proceedings of the ICM 09 held in Karlsruhe, Germany
Rigorous Upper Bound on the Critical Temperature of Dilute Bose Gases
Creators: name: Seiringer, Robert
name: Ueltschi, Daniel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove exponential decay of the off-diagonal correlation function in the two-dimensional homogeneous Bose gas when a^2 ρis small and the temperature T satisfies T > 4 πρ/ \ln |\ln(a^2ρ). Here, a is the scattering length of the repulsive interaction potential and ρis the density. To leading order in a^2 ρ, this bound agrees with the expected critical temperature for superfluidity. In the three-dimensional Bose gas, exponential decay is proved when ΔT_c / T_c^0 > 5 \sqrt{a ρ^{1/3}}, where T_c^0 is the critical temperature of the ideal gas. While this condition is not expected to be sharp, it gives a rigorous upper bound on the critical temperature for Bose-Einstein condensation.
description: 10 pages, 2 figures
Methods for the Study of Transverse Momentum Differential Correlations
Creators: name: Sharma, Monika
name: Pruneau, Claude A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We introduce and compare three differential correlation functions for the study of transverse momentum correlation in $p+p$ and $A+A$ collisions. These consist of {\it inclusive}, {\it event-wise} and a differential version of the correlation measure $\tilde C$ introduced by Gavin \cite{Gavin} for experimental study of the viscosity per unit entropy of the matter produced in $A+A$ collisions. We study the quantitative difference between the three observables on the basis of PYTHIA simulations of $p+p$ collisions and $A+A$ collisions consisting of an arbitrary superposition of $p+p$ collision events at $\sqrt{s} = $200 GeV. We observe that {\it inclusive} and {\it event-wise} correlation functions are remarkably identical to each other where as the observable $\tilde C$ differs from the two. We study the robustness and efficiency dependencies of these observables based on truncated Taylor expansions in efficiency in $p+p$ collisions and on the basis of Monte Carlo simulation using an adhoc detector efficiency parameterization. We find that all the three observables are essentially independent of detector efficiency. We additionally study the scaling of the correlation measures and find all the observables exhibit an approximate $1/N$ dependence of the number of participants ({\it N}) in $A+A$ collisions. Finally, we study the impact of flow-like anisotropy on the {\it inclusive} correlation function and find flow imparts azimuthal modulations similar to those observed with two-particle densities.
description: 19 pages, 8 figures
Collective fluctuations in networks of noisy components
Creators: name: Masuda, Naoki
name: Kawamura, Yoji
name: Kori, Hiroshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Collective dynamics result from interactions among noisy dynamical components. Examples include heartbeats, circadian rhythms, and various pattern formations. Because of noise in each component, collective dynamics inevitably involve fluctuations, which may crucially affect functioning of the system. However, the relation between the fluctuations in isolated individual components and those in collective dynamics is unclear. Here we study a linear dynamical system of networked components subjected to independent Gaussian noise and analytically show that the connectivity of networks determines the intensity of fluctuations in the collective dynamics. Remarkably, in general directed networks including scale-free networks, the fluctuations decrease more slowly with the system size than the standard law stated by the central limit theorem. They even remain finite for a large system size when global directionality of the network exists. Moreover, such nontrivial behavior appears even in undirected networks when nonlinear dynamical systems are considered. We demonstrate it with a coupled oscillator system.
description: 5 figures
The multilinear strong maximal function
Creators: name: Grafakos, Loukas
name: Liu, Liguang
name: Perez, Carlos
name: Torres, Rodolfo H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42B20, 42B25

description: A multivariable version of the strong maximal function is introduced and a sharp distributional estimate for this operator in the spirit of the Jessen, Marcinkiewicz, and Zygmund theorem is obtained. Conditions that characterize the boundedness of this multivariable operator on products of weighted Lebesgue spaces equipped with multiple weights are obtained. Results for other multi(sub)linear maximal functions associated with bases of open sets are studied too. Certain bilinear interpolation results between distributional estimates, such as that obtained for the multivariable strong maximal function, are also proved.
description: appeared in J. of Geometric Anal
Adiabatic versus Isocurvature Non--Gaussianity
Creators: name: Hikage, Chiaki
name: Munshi, Dipak
name: Heavens, Alan
name: Coles, Peter
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the extent to which one can distinguish primordial non--Gaussianity (NG) arising from adiabatic and isocurvature perturbations. We make a joint analysis of different NG models based on various inflationary scenarios: local-type and equilateral-type NG from adiabatic perturbations and local-type and quadratic-type NG from isocurvature perturbations together with a foreground contamination by point sources. We separate the Fisher information of the bispectrum of CMB temperature and polarization maps by l for the skew spectrum estimator introduced by Munshi & Heavens (2009) to study the scale dependence of the signal-to-noise ratio of different NG components and their correlations. We find that the adiabatic and the isocurvature modes are strongly correlated, though the phase difference of acoustic oscillations helps to distinguish them. The correlation between local-and equilateral-type is weak, but the two isocurvature modes are too strongly correlated to be discriminated. Point source contamination, to the extent to which it can be regarded as white noise, can be almost completely separated from the primordial components for l>100. Including correlations among the different components, we find that the errors of the NG parameters increase by 20-30% for the WMAP 5-year observation, but 5% for Planck observations.
description: 7 pages, 3 figures
LARGE Volume String Compactifications at Finite Temperature
Creators: name: Anguelova, Lilia
name: Calo, Vincenzo
name: Cicoli, Michele
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a detailed study of the finite-temperature behaviour of the LARGE Volume type IIB flux compactifications. We show that certain moduli can thermalise at high temperatures. Despite that, their contribution to the finite-temperature effective potential is always negligible and the latter has a runaway behaviour. We compute the maximal temperature $T_{max}$, above which the internal space decompactifies, as well as the temperature $T_*$, that is reached after the decay of the heaviest moduli. The natural constraint $T_*
description: 54 pages + appendix, 5 figures; v2: minor corrections, references and footnotes added, version published on JCAP
Vortex interactions in a thin platelet superconductor
Creators: name: Lin, Cedric Yen-Yu
name: Affleck, Ian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The thermal fluctations of vortices in a superconductor can be usefully mapped onto the quantum fluctations of a collection of bosons at T=0 moving in 2 dimensions. When the superconductor is a thin platelet with the magnetic field parallel to its surface, the interacting quantum bosons are effectively moving in 1 dimension, allowing for powerful Luttinger liquid methods to be applied. Here we consider how this 1 dimensional limit is approached, studying the interaction of vortices with the platelet surfaces and each other. Using realistic parameters and vortex interactions for an underdoped YBCO platelet we determine the scattering length, a, characterizing the low energy interaction of a vortex pair as a function of the platelet thickness. a determines the Luttinger parameter, g, for the quantum system at low densities, n_0: g -> 1-2an_0.
Additional file 1: of Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi
Creators: name: Razzaq, Shama
name: Nafees, Asaad
name: Rabbani, Unaib
name: Irfan, Muhammad
name: Naeem, Shahla
name: Khan, Muhammad
name: Fatmi, Zafar
name: Burney, Peter
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Table S1. Frequency distribution of socio-demographic, anthropometric, household, lifestyle and occupational factors among adults ≥18 years according to self-reported physician-diagnosed asthma, Karachi, Pakistan (n = 1629). (DOCX 16 kb)
Chatbot Tools Evaluation - 8th International Conference on Contemporary Marketing Issues, Virtual Conference, 11-13 September 2020
Creators: name: Gkikas, Dimitris C
name: Theodoridis, Prokopis K
name: Tzavella, Georgia
name: Vlachopoulou, Goergia
name: Kondyli, Isidora
name: Tzioli, Melpomeni
Publisher: name: figshare
Year: 2021
Subjects: subject: 150302 Business Information Systems
subject: FOS: Economics and business
subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences
subject: 80709 Social and Community Informatics
subject: FOS: Media and communications
subject: Information Systems
subject: 150301 Business Information Management (incl. Records, Knowledge and Information Management, and Intelligence)

description: Nowadays, chatbots are almost a reality in people’ everyday lives, which is becoming more and more popular as the time passes. Chatbots’ experts and communities work continuously to add value to these tools by extending their features, implement natural language characteristics and plug-ins and funnel them in many popular conversational social channels. There are plenty tasks that they could cover, but there is a special emphasis on the support part they fulfill, as complementary to the human effort. Since chatbots are an undeniable trend, they are also a must-have tool for the organizations. A great part of our research focused on their utility, features, and capabilities to clearly define what someone should expect from such set of tools. Modern chatbot frameworks support many business applications, as they provide solutions to many critical activities of the entrepreneurial spectrum. Following our reference in the relevant literature and existing chatbot frameworks and in order to facilitate entrepreneurs’ demand to understand, which the right tool is for each one’s needs, our team conducted a chatbot framework comparison to present similarities and differences of each tool to the stakeholders. In order to accomplish such task many qualitative factors and indicators were taken into consideration, so that we would provide a holistic and useful insight. To get this analysis outcome, we came up with a framework proposal that could be readily utilized to provide the data needed from the interested parties. The literature review, as well the presentation of frameworks’ features and the suggested framework have been analyzed aiming to contribute to the whole entrepreneurial world, but also to provide a step forward to the scientific community. We discussed our findings, while also quoting our research’s results hoping eventually that they will contribute substantially in chatbots’ science.
Additional file 1: of A prospective, single-arm, open-label, non-randomized, phase IIa trial of a nonavalent prophylactic HPV vaccine to assess immunogenicity of a prime and deferred-booster dosing schedule among 9â 11â year-old girls and boys â clinical protocol
Creators: name: Zeng, Yi
name: Moscicki, Anna-Barbara
name: Sahasrabuddhe, Vikrant
name: Garcia, Francisco
name: Woo, Heide
name: Hsu, Chiu-Hsieh
name: Szabo, Eva
name: Dimond, Eileen
name: Vanzzini, Susan
name: Mondragon, Angelica
name: Butler, Valerie
name: DeRose, Hillary
name: Chow, H.-H.
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: WHO Trial Registration Data Set. All items from the World Health Organization Trial Registration Data Set. (DOCX 15 kb)
ПРИМЕНЕНИЕ УРАВНЕНИЯ НАВЬЕ-СТОКСА К ИЗУЧЕНИЮ ДИНАМИКИ ЗАПЫЛЕННОГО ВОЗДУХА
Creators: name: Уразалиев, Розикжон
name: Адилова, Азиза
Publisher: name: Zenodo
Year: 2024

description: In this article examines the solution of the Reynolds equations for each of the Reynolds stress components of the Navier-Stokes equation, an accurate analysis of swirling flow structure, centripetal velocity, tangential velocity, shear diameter, and pressure drop in cyclone simulations.
Universal Dephasing of Many-Body Rabi Oscillations of Atoms in One-Dimensional Traps
Creators: name: Huber, Sebastian D.
name: Altman, Ehud
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a quantum quench in a system of two coupled one-dimensional tubes of interacting atoms. After the quench the system is out of equilibrium and oscillates between the tubes with a frequency determined by microscopic parameters. Despite the high energy at which the system is prepared we find an emergent long time scale responsible for the dephasing of the oscillations and a transition at which this time scale diverges. We show that the universal properties of the dephasing and the transition arise from an infrared orthogonality catastrophe. Furthermore, we show how this universal behavior is realized in a realistic model of fermions with attractive interactions.
description: 4 pages, 2 figures
Comparative study of the finite-temperature thermodynamics of a unitary Fermi gas
Creators: name: Qin, Fang
name: Chen, Ji-sheng
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the finite-temperature thermodynamics of a unitary Fermi gas. The chemical potential, energy density and entropy are given analytically with the quasi-linear approximation. The ground state energy agrees with previous theoretical and experimental results. Recently, the generalized exclusion statistics is applied to the discussion of the finite-temperature unitary Fermi gas thermodynamics. A concrete comparison between the two different approaches is performed. Emphasis is made on the behavior of the entropy per particle. In physics, the slope of entropy gives the information for the effective fermion mass $m^*/m$ in the low temperature strong degenerate region. Compared with $m^*/m \approx 0.70<1$ given in terms of the generalized exclusion statistics, our quasi-linear approximation determines $m^*/m\approx 1.11>1$.
description: 7 pages; accepted for publication in Phys. Rev. A
Integration of genomics into the antimicrobial resistance surveillance network of Cambodia workshop report
Creators: name: Manning, Jessica
name: Chanthap Lon
name: Yek, Christina
name: Sophana Chea
name: Piseth Ly
Publisher: name: Gates Open Research
Year: 2023

description: The U.S. National Institute of Allergy and Infectious Diseases International Center of Excellence in Research in Cambodia (ICER Cambodia) is collaborating with the Cambodia Communicable Disease Center (CCDC) and Cambodian regional hospitals to study the landscape of bacterial antimicrobial resistance (AMR) in Cambodia. The objective of the collaboration is to use next-generation sequencing techniques to discover common and novel AMR genes in bacterial isolates to inform national surveillance and clinical practice.
 In January 2023, a workshop was held with the following objectives: 1) to establish fundamental understanding of how genomics can enhance AMR surveillance in Cambodia and 2) to understand practical applications and feasibility of applying genomics in microbiological laboratories in Cambodia. This report provides a summary of workshop presentations from various participating groups.