cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Updated measurements of absolute D+ and D0 hadronic branching fractions and σ (e+e- →d D ̄) at Ecm=3774MeV updated measurements of absolute D+ and ⋯g. Bonvicini et al.
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: hep-ex

description: Utilizing the full CLEO-c data sample of 818pb-1 of e+e- data taken at the ψ(3770) resonance, we update our measurements of absolute hadronic branching fractions of charged and neutral D mesons. We previously reported results from subsets of these data. Using a double tag technique we obtain branching fractions for three D0 and six D+ modes, including the reference branching fractions B(D0→K-π+)=(3.934±0.021±0.061)% and B(D+→K-π+π+)=(9.224±0.059±0.157)%. The uncertainties are statistical and systematic, respectively. In these measurements we include the effects of final-state radiation by allowing for additional unobserved photons in the final state, and the systematic errors include our estimates of the uncertainties of these effects. Furthermore, using an independent measurement of the luminosity, we obtain the cross sections σ(e+e- →D0D̄0)=(3.607±0.017±0.056)nb and σ(e+e-→D+D- )=(2.882±0.018±0.042)nb at a center of mass energy, Ecm=3774±1MeV. © 2014 American Physical Society.
Supports in Lipschitz-free spaces and applications to extremal structure
Creators: name: Aliaga, Ramón J.
name: Pernecká, Eva
name: Petitjean, Colin
name: Procházka, Antonín
Publisher: name: arXiv
Year: 2019
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B20, 46B04, 54E50

description: We show that the class of Lipschitz-free spaces over closed subsets of any complete metric space $M$ is closed under arbitrary intersections, improving upon the previously known finite-diameter case. This allows us to formulate a general and natural definition of supports for elements in a Lipschitz-free space $\mathcal F(M)$. We then use this concept to study the extremal structure of $\mathcal F(M)$. We prove in particular that $(δ(x) - δ(y))/d(x,y)$ is an exposed point of the unit ball of $\mathcal F(M)$ whenever the metric segment $[x,y]$ is trivial, and that any extreme point which can be expressed as a finitely supported perturbation of a positive element must be finitely supported itself. We also characterise the extreme points of the positive unit ball: they are precisely the normalized evaluation functionals on points of $M$.
description: Final accepted version. Only cosmetic changes wrt v1
Universal quantum computation in decoherence-free subspaces with hot trapped-ions
Creators: name: Aolita, Leandro
name: Davidovich, Luiz
name: Kim, Kihwan
name: Häffner, Hartmut
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider interactions that generate a universal set of quantum gates on logical qubits encoded in a collective-dephasing-free subspace, and discuss their implementations with trapped ions. This allows for the removal of the by-far largest source of decoherence in current trapped-ion experiments, collective dephasing. In addition, an explicit parametrization of all two-body Hamiltonians able to generate such gates without the system's state ever exiting the protected subspace is provided.
description: 8 pages, 1 figure
mobilenet-v1.onnx model
Creators: name: Https://Github.Com/Tensorflow/Models/Blob/Master/Research/Slim/Nets/Mobilenet_v1.Md
Publisher: name: Zenodo
Year: 2019
Subjects: Image Classification, mobilenetv1, tensorflow, ONNX, Inference, Imagenet2012, Inference, Pretrained Model

description: Application: Image Classification ML Task: mobilenetv1 Framework: ONNX (via tensorflow) Training Information:  Quality: 70.9% Precision: fp32 Is Quantized: no Is ONNX: yes Dataset: http://www.image-net.org/challenges/LSVRC/2012/
description: script to convert from tensorflow: https://gist.github.com/guschmue/788ae7f602c1f15ce3998b8d5f56ed2e
Decay of the Mixed States
Creators: name: Bolotin, Yu. L.
name: Cherkaskiy, V. A.
name: Ivashkevych, G. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the classical escape from local minima for 2d multi-well Hamiltonian systems, realizing the mixed state. We show that escape from such local minima has a diversity of principally new features, representing an interesting topic for conceptual understanding of chaotic dynamics and applications.
description: 4 pages, 4 figures
Extending Sobolev functions with partially vanishing traces from locally (ε, δ)-domains and applications to mixed boundary problems
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Higher-order Sobolev space
Linear extension operator
Locally (epsilon, delta)-domain
Higher-order boundary trace operator
Real and complex interpolation
Besov and Triebel-Lizorkin spaces
Bessel potential space and capacity
Ahlfors regular set
Synthesis
Mixed boundary value problem
Higher-order elliptic system

description: We prove that given any k∈N, for each open set Ω⊆Rn and any closed subset D of Ω- such that Ω is locally an (ε, δ)-domain near ∂Ω. D, there exists a linear and bounded extension operator Ek,D mapping, for each p∈. [1, ∞], the space WDk,p(Ω) into WDk,p(Rn). Here, with O denoting either Ω or Rn, the space WDk,p(O) is defined as the completion in the classical Sobolev space Wk,p(O) of (restrictions to O of) functions from Cc∞(Rn) whose supports are disjoint from D. In turn, this result is used to develop a functional analytic theory for the class WDk,p(Ω) (including intrinsic characterizations, boundary traces and extensions results, interpolation theorems, among other things) which is then employed in the treatment of mixed boundary value problems formulated in locally (ε, δ)-domains. Finally, we also prove extension results on the scales of Besov and Bessel potential spaces on (ε, δ)-domains with partially vanishing traces on Ahlfors regular sets and explore some of the implications of such extension results. © 2014 Elsevier Inc.
ASSIMILAÇÃO DE XENÓLITOS SILICÁTICOS POR MAGMAS CARBONATÍTICOS NO COMPLEXO DE JACUPIRANGA (SP)
Creators: name: Chmyz, Luanna
name: Ruberti, Excelso
name: Azzone, Rogério G.
Publisher: name: Zenodo
Year: 2021
Subjects: carbonatitos
assimilação
rochas ultramáficas

description: RESUMO – Apesar de seu caráter extremamente reativo, os principais processos de alteração atribuídos a magmas carbonatíticos sobre suas encaixantes crustais envolvem a atuação de um fluido aquoso (metassomatismo ou fenitização). Outros processos reacionais são considerados pouco significativos e desconsiderados na maioria dos modelos petrológicos. Neste projeto de pesquisa, buscou-se entender melhor os processos envolvidos nesta interação considerando o complexo de Jacupiranga (ca. 135-131 Ma, Cajati – SP), uma ocorrência carbonatítica clássica, como objeto de estudo. Nesta ocorrência, diferentes corpos de carbonatitos cálcicos e magnesianos são encontrados, todos intrusivos em no corpo clinopiroxenítico principal. O contato entre os carbonatitos cálcicos e a encaixante clinopiroxenítica é marcado por zonas de xenólitos, formadas por blocos de clinopiroxenito envolvidos por carbonatitos. Análises de química mineral (EPMA e LA-ICP-MS), aliadas a dados compilados da literatura, indicam que a assimilação desses xenólitos causou um aumento local da atividade de sílica no magma carbonatítico e teve um papel fundamental não somente na formação de rochas de reação como também na evolução do carbonatito de Jacupiranga. Reações esquemáticas indicam que o componente carbonatítico necessário para gerar as fases silicáticas dos diferentes domínios das rochas de reação aumenta progressivamente conforme a proximidade com o front carbonatítico. Deste modo, a atividade do fundido carbonatítico foi um fator determinante no controle da formação das rochas de reação (em detrimento de fluidos aquosos, por exemplo). Além disso, carbonatos e apatitas das rochas de reação apresentam assinaturas tipicamente primárias, ratificando que as reações na interface entre magma carbonatítico e clinopiroxenito ocorreram em um contexto dominante magmático. A caracterização de processos de assimilação de xenólitos da encaixante é inédita para o carbonatito desta ocorrência brasileira. Ao contrário dos modelos anteriormente propostos, que atribuem às rochas de reação de Jacupiranga uma origem exclusivamente relacionada a processos de fenitização, considera-se, neste trabalho, que o fundido carbonatítico é o principal agente responsável por sua gênese.
ปัจจัยด้านการออกแบบกราฟิกที่มีผลต่อการดึงดูดและสื่อสาระที่เข้าใจกรณีศึกษาแผ่นภาพที่สื่อสาระด้านวิชาการ
Creators: name: อุทัยวรรณ  ประสงค์เงิน
Publisher: name: สถาบันเทคโนโลยีพระจอมเกล้าเจ้าคุณทหารลาดกระบัง
Year: 2013
Subjects: กราฟิก, แผ่นภาพวิชาการ, การวัดซ้ำ

description: 1, 7, วารสารวิชาการและวิจัย มทร.พระนคร
โครงการถ่ายทอดเทคโนโลยีการสร้างและใช้งานบ่อหมักแก๊สชีวภาพสำหรับครัวเรือน ในชุมชนบ้านท่าทองแดง จ.ตาก
Creators: name: ยุธนา  ศรีอุดม
Publisher: name: มหาวิทยาลัยเทคโนโลยีราชมงคลล้านนา
Year: 2013
Subjects: แก๊สชีวภาพ, การถ่ายทอดเทคโนโลยี

description: 1, 7, วารสารวิชาการและวิจัย มทร.พระนคร
SUPER. VI. A giant molecular halo around a z~2 quasar
Creators: name: Cicone, C.
name: Mainieri, V.
name: Circosta, C.
name: Kakkad, D.
name: Vietri, G.
name: Perna, M.
name: Bischetti, M.
name: Carniani, S.
name: Cresci, G.
name: Harrison, C.
name: Mannucci, F.
name: Marconi, A.
name: Piconcelli, E.
name: Puglisi, A.
name: Scholtz, J.
name: Vignali, C.
name: Zamorani, G.
name: Zappacosta, L.
name: Battaia, F. Arrigoni
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the discovery of copious molecular gas in the halo of cid_346, a $z=2.2$ quasar studied as part of the SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER). New Atacama Compact Array (ACA) CO(3-2) observations detect a much higher flux (by a factor of $14\pm5$) than measured on kiloparsec scales ($r\lesssim8$ kpc) using previous snapshot Atacama Large Millimeter/submillimeter Array data. Such additional CO(3-2) emission traces a structure that extends out to $r\sim200$ kpc in projected size, as inferred through direct imaging and confirmed by an analysis of the uv visibilities. This is the most extended molecular circumgalactic medium (CGM) reservoir that has ever been mapped. It shows complex kinematics, with an overall broad line profile (FWHM $= 1000$ km/s) that is skewed towards redshifted velocities up to at least $v\sim1000$ km/s. Using the optically thin assumption, we estimate a strict lower limit for the total molecular CGM mass observed by ACA of $M_{mol}^{CGM}>10^{10}~M_{\odot}$. There is however room for up to $M^{CGM}_{mol}\sim 1.7\times 10^{12}$ $M_{\odot}$, once optically thick CO emission with $α_{\rm CO}=3.6$ $\rm M_{\odot}~(K~km~s^{-1}~pc^2)^{-1}$ and $L^{\prime}_{CO(3-2)}/L^{\prime}_{CO(1-0)}=0.5$ are assumed. Since cid_346 hosts quasar-driven ionised outflows and since there is no evidence of merging companions or an overdensity, we suggest that outflows may have played a crucial rule in seeding metal-enriched, dense gas on halo scales. However, the origin of such an extended molecular CGM remains unclear.
description: Accepted for publication in A&A Letters. 9 pages and 9 figures including Appendix. Version updated after language editing
พัฒนาการตลาดนัด
Creators: name: ทรงสิริ  วิชิรานนท์
Publisher: name: มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร
Year: 2013
Subjects: พัฒนาการ, ตลาดนัด

description: 1, 7, วารสารวิชาการและวิจัย มทร.พระนคร
Monte Carlo simulation of a model cuprate
Creators: name: Panov, Yu. D.
name: Moskvin, A. S.
name: Chikov, A. A.
name: Ulitko, V. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: I.6.8
subject: 82M31

description: We develop a classical Monte Carlo algorithm based on a quasi-classical approximation for a pseudospin S=1 Hamiltonian in real space to construct a phase diagram of a model cuprate with a high Tc. A model description takes into account both local and nonlocal correlations, Heisenberg spin-exchange interaction, correlated single-particle, and two-particle transport. We formulate a state selection algorithm for a given parameterization of the wave function in order to ensure a uniform distribution of states in the phase space. The simulation results show a qualitative agreement with the experimental phase diagrams.
description: 9 pages, 3 figures
Jet-hadron correlations in sNN =200GeV p+p and central Au+Au collisions
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: STAR Collaboration

description: Azimuthal angular correlations of charged hadrons with respect to the axis of a reconstructed (trigger) jet in Au+Au and p+p collisions at sNN=200GeV in STAR are presented. The trigger jet population in Au+Au collisions is biased toward jets that have not interacted with the medium, allowing easier matching of jet energies between Au+Au and p+p collisions while enhancing medium effects on the recoil jet. The associated hadron yield of the recoil jet is significantly suppressed at high transverse momentum (pTassoc) and enhanced at low pTassoc in 0%-20% central Au+Au collisions compared to p+p collisions, which is indicative of medium-induced parton energy loss in ultrarelativistic heavy-ion collisions. © 2014 American Physical Society.
Non-singular quantum gravitational dynamics of an LTB dust shell model: the role of quantization prescriptions
Creators: name: Giesel, Kristina
name: Li, Bao-Fei
name: Singh, Parampreet
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study some consequences of the loop quantization of the outermost dust shell in the Lemaître-Tolman-Bondi spacetime with a homogeneous dust density using different quantization strategies motivated by loop quantum gravity. Prior work has dealt with loop quantizing this model by employing holonomies and the triads, following the procedure in standard loop quantum cosmology. In this work we compare this quantization with the one in which holonomies and gauge-covariant fluxes are used. While both of the quantization schemes resolve the central singularity, they lead to different mass gaps at which a trapped surface forms. This trapped surface which is matched to an exterior generalized Vaidya spacetime disappears when the density of the dust shell is in the Planck regime. We find that the quantization based on holonomies and gauge-covariant fluxes generically results in an asymmetric evolution of the dust shell in which the effective mass associated with the white hole as seen by an external observer is $2/π$ of the one for the black hole. This effective difference in masses results from difference in the classical limits in pre- and post-bounce regimes in the two quantizations. This distinctive feature rules out formation of any black hole-white hole twin in presence of gauge-covariant flux modifications which is in contrast to the quantization using holonomies and triads where the gravitational collapse always leads to a black hole-white hole twins. In another striking difference, for the quantization based on holonomies and gauge-covariant fluxes there can be situations in which during a non-singular collapse only a black hole forms without a white hole.
description: 20 pages and 5 figures
Stability of the fermionic gases close to a p-wave Feshbach resonance
Creators: name: Levinsen, J.
name: Cooper, N. R.
name: Gurarie, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the stability of the paired fermionic p-wave superfluid made out of identical atoms all in the same hyperfine state close to a p-wave Feshbach resonance. First we reproduce known results concerning the lifetime of a 3D superfluid, in particular, we show that it decays at the same rate as its interaction energy, thus precluding its equilibration before it decays. Then we proceed to study its stability in case when the superfluid is confined to 2D by means of an optical harmonic potential. We find that the relative stability is somewhat improved in 2D in the BCS regime, such that the decay rate is now slower than the appropriate interaction energy scale. The improvement in stability, however, is not dramatic and one probably needs to look for other mechanisms to suppress decay to create a long lived 2D p-wave fermionic superfluid.
Multi-Dimension Framework for Global Education System
Creators: name: Hajebi, Elnaz
name: Bälter, Olof
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390399
subject: Education systems not elsewhere classified

description: In today’s growing interconnected and rapidly evolving world, where all aspects of human life are interdependent, a broader understanding of cultures, economies, politics, and social issues is required. Considering the importance of education role in this issue, diverse traditional education systems around the world have resulted in fragmented approaches that fall short in preparing individuals for the complexities of an interlinked global society. To this end, it is necessary to provide a new innovative education model that adapts to and integrates evolving socio-economic and technological dimensions. This paper presents a great vision of a comprehensive framework for a dynamic global education system leveraging cutting-edge digital technologies such as artificial intelligence to interconnect economic, social, cultural, technological, and well-being dimensions aligning with the Sustainable Development Goals (SDGs), thereby facilitates equitable access to quality education and aspires to transcend conventional boundaries leading to foster holistic development and global collaboration.
System-level, Input-output and New Parameterizations of Stabilizing Controllers, and Their Numerical Computation
Creators: name: Zheng, Yang
name: Furieri, Luca
name: Kamgarpour, Maryam
name: Li, Na
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: It is known that the set of internally stabilizing controller $\mathcal{C}_{\text{stab}}$ is non-convex, but it admits convex characterizations using certain closed-loop maps: a classical result is the Youla parameterization, and two recent notions are the system-level parameterization (SLP) and the input-output parameterization (IOP). In this paper, we address the existence of new convex parameterizations and discuss potential tradeoffs of each parametrization in different scenarios. Our main contributions are: 1) We reveal that only four groups of stable closed-loop transfer matrices are equivalent to internal stability: one of them is used in the SLP, another one is used in the IOP, and the other two are new, leading to two new convex parameterizations of $\mathcal{C}_{\text{stab}}$. 2) We investigate the properties of these parameterizations after imposing the finite impulse response (FIR) approximation, revealing that the IOP has the best ability of approximating $\mathcal{C}_{\text{stab}}$ given FIR constraints. 3) These four parameterizations require no \emph{a priori} doubly-coprime factorization of the plant, but impose a set of equality constraints. However, these equality constraints will never be satisfied exactly in floating-point arithmetic computation and/or implementation. We prove that the IOP is numerically robust for open-loop stable plants, in the sense that small mismatches in the equality constraints do not compromise the closed-loop stability; but a direct IOP implementation will fail to stabilize open-loop unstable systems in practice. The SLP is known to enjoy numerical robustness in the state feedback case; here, we show that numerical robustness of the four-block SLP controller requires case-by-case analysis even the plant is open-loop stable.
description: 21 pages; 6 figures; minor updates on the numerical robustness of closed-loop parameterization; accepted for publication as a regular paper in Automatica
Acceleration of an aromatic claisen rearrangement via a designed spiroligozyme catalyst that mimics the ketosteroid isomerase catalytic dyad
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: Biomimetic Materials
Catalysis
Coumarins
Hydrogen Bonding
Methylation
Models, Molecular
Steroid Isomerases

description: A series of hydrogen-bonding catalysts have been designed for the aromatic Claisen rearrangement of a 1,1-dimethylallyl coumarin. These catalysts were designed as mimics of the two-point hydrogen-bonding interaction present in ketosteroid isomerase that has been proposed to stabilize a developing negative charge on the ether oxygen in the migration of the double bond.1 Two hydrogen bond donating groups, a phenol alcohol and a carboxylic acid, were grafted onto a conformationally restrained spirocyclic scaffold, and together they enhance the rate of the Claisen rearrangement by a factor of 58 over the background reaction. Theoretical calculations correctly predict the most active catalyst and suggest that both preorganization and favorable interactions with the transition state of the reaction are responsible for the observed rate enhancement. © 2014 American Chemical Society.
Accessing Phase Slip Events in Nb Meander Wires
Creators: name: Sawle, Deepika
name: Husale, Sudhir
name: Yadav, Sachin
name: Gajar, Bikash
name: Awana, V. P. S.
name: Sahoo, Sangeeta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report transport studies through Nb-based superconducting meander wires fabricated by focused ion beam (FIB) milling technique. The effect of meandering on quantum transport has been probed experimentally by a direct comparison with the pristine thin-film device before meandering. The normal metal (NM) to superconductor (SC) phase transition becomes a wide and multi-step transition by meandering. Below the transition temperature (Tc), the resistance-versus-temperature measurements reveal resistive tailing which is explained by the thermally activated phase slip (TAPS) mechanism. The TAPS fit indicates a selective region of the meander to be responsible for the resistive tailing. Besides, the phase slip (PS) mechanism in the meander is evident in its current-voltage characteristics that feature the stair-case type intermediate resistive steps during the SC-NM transition. The modulation of the intermediate resistive steps is investigated with respect to temperature and external magnetic field. It is observed that the PS events are facilitated by magnetic fields up to about 250 mT. Further, the critical current varies strongly on the temperature and magnetic field for T less than 0.5Tc and H less tahn 100 mT where it fluctuates in an oscillatory manner. Finally, Nb based meander structures can be promising candidates for future PS based studies and applications.
description: Accepted for publication in Superconductor Science and Technology
Homotopy theoretic models of identity types
Creators: name: Awodey, Steve
name: Warren, Michael A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic (math.LO)
subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 18C50 (Primary); 18G55; 03B15; 03F65 (Secondary)

description: This paper presents a novel connection between homotopical algebra and mathematical logic. It is shown that a form of intensional type theory is valid in any Quillen model category, generalizing the Hofmann-Streicher groupoid model of Martin-Loef type theory.
description: 11 pages
Disconnected quark loop contributions to nucleon observables in lattice QCD
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: hep-lat
hep-ph
nucl-th

description: We perform a high statistics calculation of disconnected fermion loops on graphics processing units for a range of nucleon matrix elements extracted using lattice QCD. The isoscalar electromagnetic and axial vector form factors, the sigma terms and the momentum fraction and helicity are among the quantities we evaluate. We compare the disconnected contributions to the connected ones and give the physical implications on nucleon observables that probe its structure. © 2014 American Physical Society.
Spin orbit coupling in bulk ZnO and GaN
Creators: name: Fu, J. Y.
name: Wu, M. W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Using group theory and Kane-like $\mathbf{k\cdot p}$ model together with the Löwdining partition method, we derive the expressions of spin-orbit coupling of electrons and holes, including the linear-$k$ Rashba term due to the intrinsic structure inversion asymmetry and the cubic-$k$ Dresselhaus term due to the bulk inversion asymmetry in wurtzite semiconductors. The coefficients of the electron and hole Dresselhaus terms of ZnO and GaN in wurtzite structure and GaN in zinc-blende structure are calculated using the nearest-neighbor $sp^3$ and $sp^3s^\ast$ tight-binding models separately.
description: 9 pages, 6 figures, to be published in J. Appl. Phys
X-ray Spectral Identification of Three Candidate Quiescent Low-Mass X-ray Binaries in the Globular Cluster NGC 6304
Creators: name: Guillot, Sebastien
name: Rutledge, Robert E.
name: Bildsten, Lars
name: Brown, Edward F.
name: Pavlov, George G.
name: Zavlin, Vyacheslav E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the search for low-mass X-ray binaries in quiescence (qLMXBs) in the globular cluster NGC 6304 using XMM observations. We present the spectral analysis leading to the identification of three candidate qLMXBs within the field of this globular cluster (GC), each consistent with the X-ray spectral properties of previously identified qLMXBs in the field and in other globular clusters -- specifically, with a hydrogen atmosphere neutron star with radius between 5--20\km. One (source 4, with R=11.7^{+8.3}_{-0.4} (D/5.97 kpc) km and kT_eff=117^{+59}_{-44} eV) is located within one core radius (r_c) of the centre of NGC 6304. This candidate also presents a spectral power-law component contributing 49 per cent of the 0.5-10 keV flux. A second one (source 9 with R=15.3^{+11.2}_{-6.5} (D/5.97 kpc) km and kT_eff=100^{+24}_{-19} eV) is found well outside the optical core (at 32 r_c) but still within the tidal radius. From spatial coincidence, we identify a bright 2MASS infrared counterpart which, at the distance of NGC 6304, seems to be a post-asymptotic giant branch star. The third qLMXB (source 5 with R=23^{+38}_{-14} (D/5.97 kpc) km and kT_eff=70^{+28}_{-20} eV) is a low signal-to-noise candidate for which we also identify from spatial coincidence a bright 2MASS infrared counterpart, with 99.916 per cent confidence. Three qLMXBs from this GC is marginally consistent with that expected from the encounter rate of NGC 6304. We also report a low signal-to-noise source with an unusually hard photon index (α=-2.0^{+1.2}_{-2.2}). Finally, we present an updated catalogue of the X-ray sources lying in the field of NGC 6304, and compare this with the previous catalogue compiled from ROSAT observations.
description: 28 pages, 9 figures, 6 tables. Accepted to MNRAS. In Press
Covolumes of nonuniform lattices in PU(n, 1)
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: math.GT
math.GR
math.NT

description: This paper studies the covolumes of nonuniform arithmetic lattices in PU(n,1). We determine the smallest covolume nonuniform arithmetic lattices for each n, the number of minimal covolume lattices for each n, and study the growth of the minimal covolume as n varies. In particular, there is a unique lattice (up to isomorphism) in PU(9,1) of smallest Euler-Poincaré characteristic amongst all nonuniform arithmetic lattices in PU(n,1).We also show that for each even n there are arbitrarily large families of nonisomorphic maximal nonuniform lattices in PU(n,1) of equal covolume. © 2014 by The Johns Hopkins University Press.
Theory of capillary-induced interactions beyond the superposition approximation
Creators: name: Dominguez, Alvaro
name: Oettel, Martin
name: Dietrich, Siegfried
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Within a general theoretical framework we study the effective, deformation-induced interaction between two colloidal particles trapped at a fluid interface in the regime of small deformations. In many studies, this interaction has been computed with the ansatz that the actual interface configuration for the pair is given by the linear superposition of the interface deformations around the single particles. Here we assess the validity of this approach and compute the leading term of the effective interaction for large interparticle separation beyond this so-called superposition approximation. As an application, we consider the experimentally relevant case of interface deformations owing to the electrostatic field emanating from charged colloidal particles. In mechanical isolation, i.e., if the net force acting on the total system consisting of the particles plus the interface vanishes, the superposition approximation is actually invalid. The effective capillary interaction is governed by contributions beyond this approximation and turns out to be attractive. For sufficiently small surface charges on the colloids, such that linearization is strictly valid, and at asymptotically large separations, the effective interaction does not overcome the direct electrostatic repulsion between the colloidal particles.
description: Minor typos corrected
A note on subfactor projections
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: math.GT
math.GR

description: We extend some results of Bestvina and Feighn [4] on subfactor projections to show that the projection of a free factor B to the free factor complex of the free factor A is well defined with uniformly bound diameter, unless either A is contained in B or A and B are vertex stabilizers of a single splitting of Fn, ie, they are disjoint. These projections are shown to satisfy properties analogous to subsurface projections, and we give as an application a construction of fully irreducible outer automorphisms using the bounded geodesic image theorem.
Alfven number for the Richtmyer-Meshkov instability in magnetized plasmas
Creators: name: Sano, Takayoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Magnetohydrodynamical evolution of the Richtmyer-Meshkov instability (RMI) is investigated by two-dimensional MHD simulations. The RMI is suppressed by a strong magnetic field, whereas the RMI amplifies an ambient magnetic field by many orders of magnitude if the seed field is weak. We have found that the suppression and amplification processes can be evaluated continuously along with the amplitude of the Alfvén number $R_A$, which is defined as the ratio of the linear growth velocity of the RMI to the Alfvén speed at the interface. When the Alfvén number is less than unity, the Lorentz force acting on the fluid mitigates the unstable motion of the RMI significantly, and the interface oscillates stably in this limit. If $R_A \gtrsim 1$, on the other hand, the surface modulation increases due to the growth of the RMI. The maximum strength of the magnetic field is enhanced up to by a factor of $R_A$. This critical feature is universal and independent of the initial Mach number of the incident shock, the Atwood number, corrugation amplitude, and even the direction of the initial magnetic field.
description: 11 pages, 8 figures, 1 table, accepted for publication in ApJ
Design of a Smooth Landing Trajectory Tracking System for a Fixed-wing Aircraft
Creators: name: Gudeta, Solomon
name: Karimoddini, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper presents a landing controller for a fixed-wing aircraft during the landing phase, ensuring the aircraft reaches the touchdown point smoothly. The landing problem is converted to a finite-time linear quadratic tracking (LQT) problem in which an aircraft needs to track the desired landing path in the longitudinal-vertical plane while satisfying performance requirements and flight constraints. First, we design a smooth trajectory that meets flight performance requirements and constraints. Then, an optimal controller is designed to minimize the tracking error, while landing the aircraft within the desired time frame. For this purpose, a linearized model of an aircraft developed under the assumption of a small flight path angle and a constant approach speed is used. The resulting Differential Riccati equation is solved backward in time using the Dormand Prince algorithm. Simulation results show a satisfactory tracking performance and the finite-time convergence of tracking errors for different initial conditions of the flare-out phase of landing.
description: 6 pages, 9 figures, American Control Conference
Extreme Scale Survey Simulation with Python Workflows
Creators: name: Villarreal, A. S.
name: Babuji, Yadu
name: Uram, Tom
name: Katz, Daniel S.
name: Chard, Kyle
name: Heitmann, Katrin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will soon carry out an unprecedented wide, fast, and deep survey of the sky in multiple optical bands. The data from LSST will open up a new discovery space in astronomy and cosmology, simultaneously providing clues toward addressing burning issues of the day, such as the origin of dark energy and and the nature of dark matter, while at the same time yielding data that will, in turn, pose fresh new questions. To prepare for the imminent arrival of this remarkable data set, it is crucial that the associated scientific communities be able to develop the software needed to analyze it. Computational power now available allows us to generate synthetic data sets that can be used as a realistic training ground for such an effort. This effort raises its own challenges -- the need to generate very large simulations of the night sky, scaling up simulation campaigns to large numbers of compute nodes across multiple computing centers with different architectures, and optimizing the complex workload around memory requirements and widely varying wall clock times. We describe here a large-scale workflow that melds together Python code to steer the workflow, Parsl to manage the large-scale distributed execution of workflow components, and containers to carry out the image simulation campaign across multiple sites. Taking advantage of these tools, we developed an extreme-scale computational framework and used it to simulate five years of observations for 300 square degrees of sky area. We describe our experiences and lessons learned in developing this workflow capability, and highlight how the scalability and portability of our approach enabled us to efficiently execute it on up to 4000 compute nodes on two supercomputers.
description: Proceeding for eScience 2021, 9 pages, 5 figures
Ultracold heteronuclear mixture of ground and excited state atoms
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: physics.atom-ph

description: We report on the realization of an ultracold mixture of lithium atoms in the ground state and ytterbium atoms in an excited metastable (P23) state. Such a mixture can support broad magnetic Feshbach resonances which may be utilized for the production of ultracold molecules with an electronic spin degree of freedom, as well as novel Efimov trimers. We investigate the interaction properties of the mixture in the presence of an external magnetic field and find an upper limit for the background interspecies two-body inelastic decay coefficient of K2′<3×10-12 cm3/s for the P23 mJ=-1 substate. We calculate the dynamic polarizabilities of the Yb(P23) magnetic substates for a range of wavelengths, and find good agreement with our measurements at 1064 nm. Our calculations also allow the identification of magic frequencies where Yb ground and metastable states are identically trapped and the determination of the interspecies van der Waals coefficients. © 2014 American Physical Society.
First-order phase transitions in two-dimensional off-lattice liquid crystals
Creators: name: Wensink, H. H.
name: Vink, R. L. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider an off-lattice liquid crystal pair potential in strictly two dimensions. The potential is purely repulsive and short-ranged. Nevertheless, by means of a single parameter in the potential, the system is shown to undergo a first-order phase transition. The transition is studied using mean-field density functional theory, and shown to be of the isotropic-to-nematic kind. In addition, the theory predicts a large density gap between the two coexisting phases. The first-order nature of the transition is confirmed using computer simulation and finite-size scaling. Also presented is an analysis of the interface between the coexisting domains, including estimates of the line tension, as well as an investigation of anchoring effects.
description: 12 pages, 17 figures, submitted to J. Phys.: Condens. Matter
Functional Convergence of Sequential U-processes with Size-Dependent Kernels
Creators: name: Döbler, Christian
name: Kasprzak, Mikołaj
name: Peccati, Giovanni
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider sequences of $U$-processes based on symmetric kernels of a fixed order, that possibly depend on the sample size. Our main contribution is the derivation of a set of analytic sufficient conditions, under which the aforementioned $U$-processes weakly converge to a linear combination of time-changed independent Brownian motions. In view of the underlying symmetric structure, the involved time-changes and weights remarkably depend only on the order of the U-statistic, and have consequently a universal nature. Checking these sufficient conditions requires calculations that have roughly the same complexity as those involved in the computation of fourth moments and cumulants. As such, when applied to the degenerate case, our findings are infinite-dimensional extensions of the central limit theorems (CLTs) proved in de Jong (1990) and Döbler and Peccati (2017). As important tools in our analysis, we exploit the multidimensional central limit theorems established in Döbler and Peccati (2019) together with upper bounds on absolute moments of degenerate $U$-statistics by Ibragimov and Sharakhmetov (2002), and also prove some novel multiplication formulae for degenerate symmetric $U$-statistics -- allowing for different sample sizes -- that are of independent interest. We provide applications to random geometric graphs and to a class of $U$-statistics of order two, whose Gaussian fluctuations have been recently studied by Robins et al. (2016), in connection with quadratic estimators in non-parametric models. In particular, our application to random graphs yields a class of new functional central limit theorems for subgraph counting statistics, extending previous findings in the literature. Finally, some connections with invariance principles in changepoint analysis are established.
description: final version
Distinct clinical and genetic features of hepatitis B virus-associated follicular lymphoma in Chinese patients-1
Creators: name: 张会来(Huilai Zhang)
Publisher: name: CNGB
Year: 2022
Subjects: Raw sequence reads
Genome sequencing
Exome
Transcriptome or Gene expression
Targeted Locus (Loci)
Multiisolate

description: Hepatitis B virus (HBV) infection has been associated with an increased risk for B-cell lymphomas. We previously showed that diffuse large B-cell lymphoma (DLBCL) patients with concomitant HBV infection (surface antigen positive, HBsAg+) are characterized by distinct clinical and genetic features. Here, we showed that 24% of follicular lymphoma (FL) patients from China, an endemic area of HBV infection, are HBsAg+. Compared to the HBsAg-negative FL patients, HBsAg+ patients are younger, have a higher histological grade at diagnosis and higher incidence of progression of disease within 24 months (POD24). Moreover, by sequencing the genomes of 109 FL tumors, we observed an enhanced mutagenesis and a unique set of highly mutated genes including TNFAIP3, FAS, HIST1H1C, KLF2, TP53, PIM1, TMSB4X and DUSP2 in HBsAg+ FLs. These HBsAg+ tumors often lack the hallmark of HBsAg-negative FLs, i.e. IGH/BCL2 translocations and CREBBP mutations. Transcriptomic analyses further showed that HBsAg+ FLs displayed gene expression signatures resembling the activated B-cell (ABC) subtype of DLBCL, involving IRF4-targeted genes and NF-B/MYD88 signaling pathways. Finally, we identified an increased number of tumor-infiltrating CD8+ memory T-cells, CD4+ Th1-cells, M1 macrophages and higher T-cell exhaustion signature in HBsAg+ FL samples. Taken together, we present new genetic/epigenetic evidence that links chronic HBV infection to B-cell lymphomagenesis, and HBV-associated FL is likely to have a distinct cell-of-origin and represent as a separate subtype of FL. Targetable genetic/epigenetic alterations identified in tumors and their associated tumor microenvironment may also provide potential novel therapeutic approaches for this subgroup of patients.
Critical properties of edge-cubic spin model on square lattice
Creators: name: Surungan, Tasrief
name: Kawashima, Naoki
name: Okabe, Yutaka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The edge-cubic spin model on square lattice is studied via Monte Carlo simulation with cluster algorithm. By cooling the system, we found two successive symmetry breakings, i.e., the breakdown of $O_h$ into the group of $C_{3h}$ which then freezes into ground state configuration. To characterize the existing phase transitions, we consider the magnetization and the population number as order parameters. We observe that the magnetization is good at probing the high temperature transition but fails in the analysis of the low temperature transition. In contrast the population number performs well in probing the low- and the high-$T$ transitions. We plot the temperature dependence of the moment and correlation ratios of the order parameters and obtain the high- and low-$T$ transitions at $T_h = 0.602(1)$ and $T_l=0.5422(2)$ respectively, with the corresponding exponents of correlation length $ν_h=1.50(1)$ and $ν_l=0.833(1)$. By using correlation ratio and size dependence of correlation function we estimate the decay exponent for the high-$T$ transition as $η_h=0.260(1)$. For the low-$T$ transition, $η_l = 0.267(1)$ is extracted from the finite size scaling of susceptibility. The universality class of the low-$T$ critical point is the same as the 3-state Potts model.
description: 20 pages, 12 figures, to appear in Phys. Rev. B
Measurement of sigma(ppbar -> Z + X) Br(Z -> tau+tau-) at sqrt(s)=1.96 TeV
Creators: name: D0 Collaboration
name: Abazov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a measurement of the cross section for Z boson production times the branching fraction to tau lepton pairs sigma(ppbar -> Z + X) Br(Z -> tau+ tau-) in proton-antiproton collisions at center of mass energy 1.96 TeV. The measurement is performed in the channel in which one tau lepton decays into a muon and neutrinos, and the other tau lepton decays hadronically or into an electron and neutrinos. The data sample corresponds to an integrated luminosity of 1.0 inverse fb collected with the D0 detector at the Fermilab Tevatron Collider. The sample contains 1511 candidate events with an estimated 20% background from jets or muons misidentified as tau leptons. We obtain sigma Br = 240 +/- 8 (stat) +/- 12 (sys) +/- 15 (lum) pb, which is consistent with the standard model prediction.
description: submitted to Phys. Lett. B
Energy dependence of moments of net-proton multiplicity distributions at RHIC
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2014
Subjects: STAR Collaboration

description: We report the beam energy (sNN=7.7-200 GeV) and collision centrality dependence of the mean (M), standard deviation (σ), skewness (S), and kurtosis (κ) of the net-proton multiplicity distributions in Au+Au collisions. The measurements are carried out by the STAR experiment at midrapidity (|y|<0.5) and within the transverse momentum range 0.4
Fox News Poll: 2016 Presidential Election/Presidential Candidates: August 2016
Creators: name: Fox News
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: 2016 presidential election (1); registered to vote (1); presidential candidates (10); Clinton vs. Trump (4); Democratic Congress (2); Republican Congress (2); President Barack Obama job performance (1); most important issue facing the country (1); the economy (1); illegal immigrants (2); Hillary Clinton vs. Donald Trump handling various issues (15); presidential candidate’s personal qualities (2); Iran's nuclear program (1); Iran released four American prisoners (1); federally issued photo identification to prove U.S. citizenship before being allowed to vote (1); Clinton's personal emails (1); Clinton Foundation (1); Trump's tax returns (1); Donald Trump rally (1); political ideology (1); religion (1).
No-ghost theorem for the fourth-order derivative Pais-Uhlenbeck oscillator model
Creators: name: Bender, Carl M.
name: Mannheim, Philip D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Contrary to common belief, it is shown that theories whose field equations are higher than second order in derivatives need not be stricken with ghosts. In particular, the prototypical fourth-order derivative Pais-Uhlenbeck oscillator model is shown to be free of states of negative energy or negative norm. When correctly formulated (as a $\cP\cT$ symmetric theory), the theory determines its own Hilbert space and associated positive-definite inner product. In this Hilbert space the model is found to be a fully acceptable quantum-mechanical theory that exhibits unitary time evolution.
description: revtex4, 4 pages