cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Composite dark matter from a model with composite Higgs boson
Creators: name: Khlopov, Maxim Yu.
name: Kouvaris, Chris
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In a previous paper \cite{Khlopov:2007ic}, we showed how the minimal walking technicolor model (WTC) can provide a composite dark matter candidate, by forming bound states between a -2 electrically charged techniparticle and a $^4He^{++}$. We studied the properties of these \emph{techni-O-helium} $tOHe$ "atoms", which behave as warmer dark matter rather than cold. In this paper we extend our work on several different aspects. We study the possibility of a mixed scenario where both $tOHe$ and bound states between +2 and -2 electrically charged techniparticles coexist in the dark matter density. We argue that these newly proposed bound states solely made of techniparticles, although they behave as Weakly Interacting Massive Particles (WIMPs), due to their large elastic cross section with nuclei, can only account for a small percentage of the dark matter density. Therefore we conclude that within the minimal WTC, composite dark matter should be mostly composed of $tOHe$. Moreover in this paper, we put cosmological bounds in the masses of the techniparticles, if they compose the dark matter density. Finally we propose within this setup, a possible explanation of the discrepancy between the DAMA/NaI and DAMA/LIBRA findings and the negative results of CDMS and other direct dark matter searches that imply nuclear recoil measurement, which should accompany ionization.
description: 23 pages
Unlocking the Potential: LLMs Transforming Research Data Management
Creators: name: Geisler, Sandra
name: Kim, Soo-Yon
Publisher: name: RWTH Aachen University
Year: 2023
Subjects: RDM
data management plans
large language models
research data management

description: From Data to Diamonds - Empowering Research with AI and RDM, Aachen, Germany, 14 Nov 2023 - 14 Nov 2023; 35 Folien (2023).
Extremely metal-poor star-forming galaxies. New detections and general morphological and photometric properties
Creators: name: Papaderos, P.
name: Guseva, N. G.
name: Izotov, Y. I.
name: Fricke, K. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) We present long-slit spectroscopy with the 3.6m ESO telescope of eight HII regions in seven star-forming (SF) dwarf galaxies, discovered in SDSS DR4 and 6dFGRS. In addition, we use SDSS imaging data to study the photometric structure of the sample galaxies. From the 3.6m telescope spectra, we determine the oxygen abundance of these systems to be 7.3<12+log(O/H)<7.6, placing them among the most metal-poor SF galaxies ever discovered. Our photometric analysis reveals a moderately blue, stellar host galaxy in all sample galaxies. The detection of a stellar host in all galaxies studied here and all previously studied extremely metal-deficient SF galaxies implies that they are unlikely to be forming their first generation of stars. With regard to the structural properties of their host galaxy, we demonstrate that these systems are indistinguishable from blue compact dwarf (BCD) galaxies. However, in contrast to the majority (>90%) of BCDs that are characterised by red elliptical host galaxies, extremely metal-poor SF dwarfs (hereafter XBCDs) reveal moderately blue and irregular hosts. This is consistent with a young evolutionary status and in the framework of standard star formation histories implies that several XBCDs formed most of their stellar mass in the past 2 Gyr. A large fraction of XBCDs reveal a cometary morphology due to the presence of intense SF activity at one edge of an elongated host galaxy with a gradually decreasing surface brightness towards its antipodal end.
description: 20 pages, 32 Postscript figures, accepted by Astronomy & Astrophysics
Wall-crossing, free fermions and crystal melting
Creators: name: Sułkowski, Piotr
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We describe wall-crossing for local, toric Calabi-Yau manifolds without compact four-cycles, in terms of free fermions, vertex operators, and crystal melting. Firstly, to each such manifold we associate two states in the free fermion Hilbert space. The overlap of these states reproduces the BPS partition function corresponding to the non-commutative Donaldson-Thomas invariants, given by the modulus square of the topological string partition function. Secondly, we introduce the wall-crossing operators which represent crossing the walls of marginal stability associated to changes of the B-field through each two-cycle in the manifold. BPS partition functions in non-trivial chambers are given by the expectation values of these operators. Thirdly, we discuss crystal interpretation of such correlators for this whole class of manifolds. We describe evolution of these crystals upon a change of the moduli, and find crystal interpretation of the flop transition and the DT/PT transition. The crystals which we find generalize and unify various other Calabi-Yau crystal models which appeared in literature in recent years.
description: 61 pages, 14 figures, published version
V-T Theory of Self Dynamic Response in a Monatomic Liquid
Creators: name: De Lorenzi-Venneri, Giulia
name: Chisolm, Eric D.
name: Wallace, Duane C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new theoretical model for self dynamic response is developed using Vibration-Transit (V-T) theory, and is applied to liquid sodium at all wavevectors q from the hydrodynamic regime to the free particle limit. In this theory the zeroth-order Hamiltonian describes the vibrational motion in a single random valley harmonically extended to infinity. This Hamiltonian is tractable, is evaluated a priori for monatomic liquids, and the same Hamiltonian (the same set of eigenvalues and eigenvectors) is used for equilibrium and nonequlibrium theory. Here, for the self intermediate scattering function Fself(q,t) we find the vibrational contribution is in near perfect agreement with molecular dynamics (MD) through short and intermediate times, at all q. This is direct confirmation that normal mode vibrational correlations are present in the motion of the liquid state. The primary transit effect is diffusive motion of the vibrational equilibrium positions, as the liquid transits rapidly among random valleys. This motion is modeled as a standard random walk, and the resulting theoretical Fself(q,t) is in excellent agreement with MD results at all q and t. In the limit for q to infinity, the theory automatically exhibits the correct approach to the free-particle limit. Also in the limit for q to zero, the hydrodynamic limit emerges as well. In contrast to the benchmark theories of generalized hydrodynamics and mode coupling, the present theory is near a priori, while achieving modestly better accuracy. Therefore, in our view, it constitutes an improvement over the traditional theories.
description: 16 pages, 11 figures, Journal Paper. Following referee's comments, Section IID has been completely rewritten and a new Section IIE has been added
To trace the progress of nursing education in the United States with consideration of the influence of university affiliation
Creators: name: Easterday, Claudene
Publisher: name: University of Oregon
Year: 1939
Subjects: Education, Nursing
Social Welfare
History of Nursing

description: The evolution and history of nursing is an art and a science has followed closely upon the rise and development of the medical profession in this country. Nursing is a comparatively recent offshoot of the Hippocratic tree, but our Guild sprang into existence in response to the same social and humanitarian instincts, impulses and necessities that gave birth to the healing art. We must consider not only the numerical expansion but the Changed attitude of the community in the recognition of the educated nurse as a necessary and dispensable element in the social welfare.
First set of tools delivered - The ENSURESEC project achieved its biggest milestone to date
Creators: name: Neitzert, Julian
name: Rademacher, Rebecca
name: Pionzewski, Christian
Publisher: name: Zenodo
Year: 2021
Subjects: Press Release
cyber security
H2020
toolkit
milestone
e-commerce
digital single market

description: Prevention, Detection, Response and Mitigation: 16 months after kickoff, the partners of the H2020 project ENSURESEC delivered their first set of tools to better protect the whole e-commerce ecosystem against cyber physical attacks.
description: Updated version of this press release - changed potentially misleading text paragraph
Additional file 1 of Plastome evolution and phylogenomic insights into the evolution of Lysimachia (Primulaceae: Myrsinoideae)
Creators: name: Liu, Tong-Jian
name: Zhang, Shu-Yan
name: Wei, Lei
name: Lin, Wei
name: Yan, Hai-Fei
name: Hao, Gang
name: Ge, Xue-Jun
Publisher: name: figshare
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 1: Fig. S1. Comparison of LSC, IRs, and SSC junction positions among Lysimachia plastomes.
Contact Integrable Extensions of Symmetry Pseudo-Group and Coverings of the r-th Modified Dispersionless Kadomtsev -- Petviashvili Equation
Creators: name: Morozov, Oleg I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58H05, 58J70, 35A30

description: We apply the technique of integrable extensions to the symmetry pseudo-group of the r-th mdKP equation. This gives another look on deriving known coverings and allows us to find new coverings for this equation.
Viable models of traversable wormholes supported by small amounts of exotic matter
Creators: name: Kuhfittig, Peter K. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Wormholes allowed by the general theory of relativity that are simultaneously traversable by humanoid travelers are subject to severe constraints from quantum field theory, particularly the so-called quantum inequalities, here slightly extended. Moreover, self-collapse of such wormholes can only be prevented by the use of "exotic matter," which, being rather problematical, should be used in only minimal quantities. However, making the layer of exotic matter arbitrarily thin leads to other problems, such as the need for extreme fine-tuning. This paper discusses a class of wormhole geometries that strike a balance between reducing the proper distance across the exotic region and the degree of fine-tuning required to achieve this reduction. Surprisingly, the degree of fine-tuning appears to be a generic feature of the type of wormhole discussed. No particular restriction is placed on the throat size, even though the proper thickness of the exotic region can indeed be quite small. Various traversability criteria are shown to be met.
description: 17 pages, 2 figures, AMSTeX
Vortex dynamics and second magnetization peak in the iron-pnictide superconductor Ca$_{0.82}$La$_{0.18}$Fe$_{0.96}$Ni$_{0.04}$As$_2$
Creators: name: Llovo, I F
name: Sóñora, D
name: Mosqueira, J
name: Salem-Sugui, S
name: Sundar, Shyam
name: Alvarenga, A D
name: Xie, T
name: Liu, C
name: Li, S -L
name: Luo, H -Q
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report the studies of detailed magnetic relaxation and isothermal magnetization measurements in the vortex state of the 112-type iron-pnictide Ca$_{0.82}$La$_{0.18}$Fe$_{0.96}$Ni$_{0.04}$As$_2$ superconductor with $T_c$ $\sim$ 22 K. In the isothermal $M(H)$, a well defined second magnetization peak (SMP) feature is observed in the entire temperature range below $T_c$ for measurements with $H$ $\parallel$ $c$-axis. However, for $H$ $\parallel$ $ab$-planes, the SMP feature is suppressed at low temperatures, which might be due to 2D Josephson vortices forming at low temperatures and high magnetic fields in such an anisotropic system. A rigorous analysis considering the magnetic relaxation data for $H$ $\parallel$ $c$-axis suggests an elastic to plastic pinning crossover across $H_p$, which also seems accompanied with a possible phase transition in vortex lattice near $H_p$. Moreover, point disorder and surface defects are likely to be the dominant sources of pinning, which contribute to the $δl$-type of pinning in the sample. A high $J_c$, in access of 10$^5$ A/cm$^2$ observed could potentially make this material technologically important.
description: 15 pages, 7 figures
Scaling behavior and sea quark dependence of pion spectrum with HYP-smeared staggered fermions
Creators: name: Adams, David
name: Bae, Taegil
name: Kim, Hyung-Jin
name: Kim, Jongjeong
name: Kim, Kwangwoo
name: Yoon, Boram
name: Lee, Weonjong
name: Jung, Chulwoo
name: Sharpe, Stephen R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study the pion spectrum (and in particular taste-symmetry breaking within it) using HYP-smeared valence staggered fermions on the coarse and fine MILC lattices (which have asqtad staggered sea quarks). We focus on the dependence on lattice spacing and sea-quark mass. We also update our results on source dependence. Our main conclusion is that on the MILC fine lattices the appropriate power-counting for SU(3) staggered chiral perturbation theory may have discretization errors entering at next-to-leading order rather than at leading-order.
description: 7 pages, 8 figures, Lattice 2008 proceeding
Clifford Algebra-valued Segal-Bargmann Transform and Taylor Isomorphism
Creators: name: Eaknipitsari, Sorawit
name: Lewkeeratiyutkul, Wicharn
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 15A66, Secondary 32A36

description: Classical Segal-Bargmann theory studies three Hilbert space unitary isomorphisms that describe the wave-particle duality and the configuration space-phase space. In this work, we generalized these concepts to Clifford algebra-valued functions. We establish the unitary isomorphisms among the space of Clifford algebra-valued square-integrable functions on $\mathbb{R}^n$ with respect to a Gaussian measure, the space of monogenic square-integrable functions on $\mathbb{R}^{n+1}$ with respect to another Gaussian measure and the space of Clifford algebra-valued linear functionals on symmetric tensor elements of $\mathbb{R}^n$.
Evolution of massive protostars: the IRAS 18151-1208 region
Creators: name: Marseille, M.
name: Bontemps, S.
name: Herpin, F.
name: van der Tak, F. F. S.
name: Purcell, C. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The study of physical and chemical properties of massive protostars is critical to better understand the evolutionary sequence which leads to the formation of high-mass stars. IRAS 18151-1208 is a nearby massive region (d = 3kpc, L ~ 20000 Lsun) which splits into three cores: MM1, MM2 and MM3 (separated by 1'-2'). We aim at (1) studying the physical and chemical properties of the individual MM1, MM2 and MM3 cores; (2) deriving their evolutionary stages; (3) using these results to improve our view of the evolutionary sequence of massive cores. The region was observed in the CS, C34S, H2CO, HCO+, H13CO+, and N2H+ lines at mm wavelengths with the IRAM 30m and Mopra telescopes. We use 1D and 2D modeling of the dust continuum to derive the density and temperature distributions, which are then used in the RATRAN code to model the lines and constrain the abundances of the observed species. All the lines were detected in MM1 and MM2. MM3 shows weaker emission, or even is undetected in HCO+ and all isotopic species. MM2 is driving a newly discovered CO outflow and hosts a mid-IR-quiet massive protostar. The abundance of CS is significantly larger in MM1 than in MM2, but smaller than in a reference massive protostar such as AFGL2591. In contrast the N2H+ abundance decreases from MM2 to MM1, and is larger than in AFGL2591. Both MM1 and MM2 host an early phase massive protostar, but MM2 (and mid-IR-quiet sources in general) is younger and more dominated by the host protostar than MM1 (mid-IR-bright). The MM3 core is probably in a pre-stellar phase. We find that the N2H+/C34S ratio varies systematically with age in the massive protostars for which the data are available. It can be used to identify young massive protostars.
description: 19 pages, 17 figures, accepted by A&A the 3 June 2008
Calculating $B_K$ using HYP staggered fermions
Creators: name: Bae, Taegil
name: Kim, Hyung-Jin
name: Kim, Jongjeong
name: Kim, Kwangwoo
name: Yoon, Boram
name: Lee, Weonjong
name: Jung, Chulwoo
name: Sharpe, Stephen R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We give an update on our calculation of $B_K$ using HYP-smeared valence staggered quarks. We have results for $B_K$ at tree-level on several coarse MILC lattices ($a\approx 0.12 $fm) and one of the fine lattices ($a\approx 0.09 $fm), using 10 light valence quarks ranging down to $m_s^{\rm phys}/10$. We have generalized staggered chiral perturbation theory to our mixed action setup, and outline the results. We explain our present fitting strategy, and give some preliminary results.
description: 7 pages, 4 figures, Lattice 2008 proceeding
Retrieving Dust Grain Sizes from Photopolarimetry: An Experimental Approach
Creators: name: Munoz, O.
name: Frattin, E.
name: Jardiel, T.
name: Gomez-Martin, J. C.
name: Moreno, F.
name: Ramos, J. L.
name: Guirado, D.
name: Peiteado, M.
name: Caballero, A. C.
name: Milli, J.
name: Menard, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the experimental phase function, degree of linear polarization (DLP), and linear depolarization (deltaL) curves of a set of forsterite samples representative of low-absorbing cosmic dust particles. The samples are prepared using state-of-the-art size-segregating techniques to obtain narrow size distributions spanning a broad range of the scattering size parameter domain. We conclude that the behavior of the phase function at the side- and back-scattering regions provides information on the size regime, the position and magnitude of the maximum of the DLP curve are strongly dependent on particle size, the negative polarization branch is mainly produced by particles with size parameters in the approx. 6 to 20 range, and the deltaL is strongly dependent on particle size at all measured phase angles except for the exact backward direction. From a direct comparison of the experimental data with computations for spherical particles, it becomes clear that the use of the spherical model for simulating the phase function and DLP curves of irregular dust produces dramatic errors in the retrieved composition and size of the scattering particles: The experimental phase functions are reproduced by assuming unrealistically high values of the imaginary part of the refractive index. The spherical model does not reproduce the bell-shaped DLP curve of dust particles with sizes in the resonance and/or geometric optics size domain. Thus, the use of the Mie model for analyzing polarimetric observations might prevent locating dust particles with sizes of the order of or larger than the wavelength of the incident light.
description: Published in ApJS
Creating ultracold molecules by collisions with ultracold rare gas atoms in an optical trap
Creators: name: Barletta, P.
name: Tennyson, J.
name: Barker, P. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We study collisions of para-H$_2$ with five rare gas atomic species (He, Ne, Ar, Kr and Xe) over the range from 1 K to 1 $μ$ K and evaluate the feasibility of sympathetic cooling H$_2$ with ultracold ground state rare gas atoms co-trapped within a deep optical trap. Collision cross-sections over this large temperature range show that all of these species could be used to cool H$_2$ to ultracold temperatures and that argon and helium are the most promising species for future experiments.
description: 5 pages, 1 figure, 1 table, submitted for publication
Diagnóstico de editoriales universitarias de Angola
Creators: name: United Nations Educational, Scientific and Cultural Organization
name: Ministério Do Ensino Superior, Ciência
name: Redalyc-Universidad Autónoma Del Estado De México
name: AmeliCA
name: Universidade Óscar Ribas
Publisher: name: Zenodo
Year: 2022
Subjects: Acceso Abierto
Angola
África
editoriales universitarias
proceso editorial
comunicación científica

description: Trabajo derivado del proyecto de colaboración entre Redalyc UAEM, AmeliCA, MESCTI y U. Óscar Ribas financiado por UNESCO para el desarrollo de una estrategia de Acceso Abierto en Angola. Vol. 9 de 38
description: {"references": ["Donum, Lda. (2021). Donum, Lda. Obtenido de https://donumonline.com/", "Editora Azul. (2021). Editora Azul. Obtenido de https://www.editoraazul.com/publicados.php", "Editores, Plural. (2021). Plural Editores. Obtenido de https://www.pluraleditores.co.ao/a-editora", "Escola Superior Pedag\u00f3gica. (2021). Escola Superior Pedag\u00f3gica. Obtenido de https://espbengo.ed.ao/", "Escola Superior Pedag\u00f3gica do Bi\u00e9. (2021). Escola Superior Pedag\u00f3gica do Bi\u00e9. Obtenido de http://www.espbie.ao/", "Instituto Superior de Ci\u00eancias da Educa\u00e7\u00e3o. (2021). Instituto Superior de Ci\u00eancias da Educa\u00e7\u00e3o. Obtenido de https://isced-huila.ed.ao/", "Instituto Superior de Ci\u00eancias da Educa\u00e7\u00e3o. (2021). Instituto Superior de Ci\u00eancias da Educa\u00e7\u00e3o. Obtenido de http://isced.ed.ao/", "Instituto Superior Polit\u00e9cnico de Sumbe. (2021). Instituto Superior Polit\u00e9cnico de Sumbe. Obtenido de https://ispks.ao/", "Instituto Superior Polit\u00e9cnico de Tecnologia e Ci\u00eancias (ISPTEC). (2021). Instituto Superior Polit\u00e9cnico de Tecnologia e Ci\u00eancias (ISPTEC). Obtenido de https://www.isptec.co.ao/", "Instituto Superior Polit\u00e9cnico Sol Nascente. (2021). Instituto Superior Polit\u00e9cnico Sol Nascente. Obtenido de https://www.ispsn.org/", "Letras, Editora Das. (2021). Editora Das Letras. Obtenido de https://www.editoradasletras.com/catalogodestaque/", "Universidade Agostinho Neto. (2021). Universidade Agostinho Neto. Obtenido de https://uan.ao/", "Universidade de Namibe. (2021). Universidade de Namibe. Obtenido de https://www.uninbe.ao/", "Universidade Jos\u00e9 Eduardo dos Santos. (2021). Universidade Jos\u00e9 Eduardo dos Santos. Obtenido de https://ujes.co.ao/", "Universidade Katyavala Bwilla. (2021). Universidade Katyavala Bwilla. Obtenido de http://www.ukb.ed.ao/", "Universidade Lueji Ankonde. (2021). Universidade Lueji Ankonde. Obtenido de http://193.136.67.121/pagina/P_c", "Universidade Mandume Nyandemu Fayo. (2021). Universidade Mandume Nyandemu Fayo. Obtenido de https://umn.ed.ao/umn/index.php/uteis/publicacoes", "Universidade Metodista. (2021). Universidade Metodista. Obtenido de http://www.uma.co.ao/", "Universidade \u00d3scar Ribas. (2021). Universidade \u00d3scar Ribas. Obtenido de http://uor.ed.ao/"]}
Total angular momentum representation for state-to-state quantum scattering of cold molecules in a magnetic field
Creators: name: Koyu, Suyesh
name: Hermsmeier, Rebekah
name: Tscherbul, Timur V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We show that the integral cross sections for state-to-state quantum scattering of cold molecules in a magnetic field can be efficiently computed using the total angular momentum representation despite the presence of unphysical Zeeman states in the eigenspectrum of the asymptotic Hamiltonian. We demonstrate that the unphysical states arise due to the incompleteness of the space-fixed total angular momentum basis caused by using a fixed cutoff value $J_\text{max}$ for the total angular momentum of the collision complex $J$. As a result, certain orbital angular momentum ($l$) basis states lack the full range of $J$ values required by the angular momentum addition rules, resulting in the appearance of unphysical states. We find that by augmenting the basis with a full range of $J$-states for every $l$, it is possible to completely eliminate the unphysical states from quantum scattering calculations on molecular collisions in external fields. To illustrate the procedure, we use the augmented basis sets to calculate the state-to-state cross sections for rotational and spin relaxation in cold collisions of $^{40}$CaH$(X^2Σ^+,v=0,N=1, M_N=1, M_S=1/2)$ molecules with $^4$He atoms in a magnetic field. We find excellent agreement with benchmark calculations, validating our proposed procedure. We find that $N$-conserving spin relaxation to the lowest-energy Zeeman state of the $N=1$ manifold, $|11\frac{1}{2}\rangle\to |1-1-\frac{1}{2}\rangle$ is nearly completely suppressed due to the lack of spin-rotation coupling between the fully spin-stretched Zeeman states. Our results demonstrate the possibility of rigorous, computationally efficient, and unphysical state-free quantum scattering calculations on cold molecular collisions in an external magnetic field.
Universal Kounterterms in Lovelock AdS gravity
Creators: name: Kofinas, Georgios
name: Olea, Rodrigo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show the universal form of the boundary term (Kounterterm series) which regularizes the Euclidean action and background-independent definition of conserved quantities for any Lovelock gravity theory with AdS asymptotics (including Einstein-Hilbert and Einstein-Gauss-Bonnet). We discuss on the connection of this procedure to the existence of topological invariants and Chern-Simons forms in the corresponding dimensions.
description: 9 pages, no figures. Contribution to the proceedings of 3rd RTN Workshop: Constituents, Fundamental Forces and Symmetries of the Universe, Valencia, Spain, 1-5 Oct 2007
Quark deconfinement phase transition for improved quark mass density-dependent model
Creators: name: Wu, Chen
name: Su, Ru-Keng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: By using the finite temperature quantum field theory, we calculate the finite temperature effective potential and extend the improved quark mass density-dependent model to finite temperature. It is shown that this model can not only describe the saturation properties of nuclear matter, but also explain the quark deconfinement phase transition successfully. The critical temperature is given and the effect of $ω$- meson is addressed.
description: 18 pages, 7 figures
A community impact study of coal development in northeast British Columbia
Creators: name: Taylor, Ross Eric
Publisher: name: University of British Columbia
Year: 2010

description: The northeast coal sector of the British Columbia economy may be the first comprehensively planned resource development in this province. If development proceeds, it will mark the first time government has taken the lead in planning townsite and community development, transportation, manpower and other key elements. The implications of coal development for existing communities within the region could be immense. The purpose of this thesis is to determine the likely effects of coal development and to anticipate the level of change that can be expected to take place in the communities of the region. Because there is a wide range of development possibilities, the method chosen to estimate the effects utilizes scenarios ranging from minimal development to full development. For each scenario projections of selected variables are compared to the baseline situation - a projection of the same variables in the absence of coal development. Each scenario is described in terms of the geographic distribution of impacts and corresponding demand for services to be provided in each community. The capacity of the communities to accommodate the predicted magnitude of change is evaluated and the impact on the region as a whole is examined. Coal development has the potential to benefit the impacted communities, the region, and the provincial and federal governments as well as private sector interests. However, this is contingent upon a competent planning process that can balance economic, social, environmental and political concerns.
Rare Events via Cross-Entropy Population Monte Carlo
Creators: name: Miller, Caleb
name: Corcoran, Jem N.
name: Schneider, Michael D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: We present a Cross-Entropy based population Monte Carlo algorithm. This methods stands apart from previous work in that we are not optimizing a mixture distribution. Instead, we leverage deterministic mixture weights and optimize the distributions individually through a reinterpretation of the typical derivation of the cross-entropy method. Demonstrations on numerical examples show that the algorithm can outperform existing resampling population Monte Carlo methods, especially for higher-dimensional problems.
Absolute Total np and pp Cross Section Determinations
Creators: name: Arndt, R. A.
name: Briscoe, W. J.
name: Laptev, A. B.
name: Strakovsky, I. I.
name: Workman, R. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Absolute total cross sections for np and pp scattering below 1000 MeV are determined based on partial-wave analyses of NN scattering data. These cross sections are compared with most recent ENDF/B and JENDL data files, and the Nijmegen partial-wave analysis. Systematic deviations from the ENDF/B and JENDL evaluations are found to exist in the low-energy region.
description: 7 pages, 3 figures, Version to appear in Nucl. Sci. Engineering
Triminimal Parametrization of Quark Mixing Matrix
Creators: name: He, Xiao-Gang
name: Li, Shi-Wen
name: Ma, Bo-Qiang
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Starting from a new zeroth order basis for quark mixing (CKM) matrix based on the quark-lepton complementarity and the tri-bimaximal pattern of lepton mixing, we derive a triminimal parametrization of CKM matrix with three small angles and a CP-violating phase as its parameters. This new triminimal parametrization has the merits of fast convergence and simplicity in application. With the quark-lepton complementary relations, we derive relations between the two unified triminimal parametrizations for quark mixing obtained in this work and for lepton mixing obtained by Pakvasa-Rodejohann-Weiler. Parametrization deviating from quark-lepton complementarity is also discussed.
description: 9 pages, no figure
LOgging UnifieD for ASTRI Mini Array
Creators: name: Incardona, Federico
name: Costa, Alessandro
name: Munari, Kevin
name: Bruno, Pietro
name: Bulgarelli, Andrea
name: Germani, Stefano
name: Grillo, Alessandro
name: Schwarz, Joseph
name: Sciacca, Eva
name: Tosti, Gino
name: Vitello, Fabio
name: Tudisco, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) Mini-Array (MA) project is an international collaboration led by the Italian National Institute for Astrophysics (INAF). ASTRI MA is composed of nine Cherenkov telescopes operating in the energy range 1-100 TeV, and it aims to study very high-energy gamma ray astrophysics and optical intensity interferometry of bright stars. ASTRI MA is currently under construction, and will be installed at the site of the Teide Observatory in Tenerife (Spain). The hardware and software system that is responsible of monitoring and controlling all the operations carried out at the ASTRI MA site is the Supervision Control and Data Acquisition (SCADA). The LOgging UnifieD (LOUD) subsystem is one of the main components of SCADA. It provides the service responsible for collecting, filtering, exposing and storing log events collected by all the array elements (telescopes, LIDAR, devices, etc.). In this paper, we present the LOUD architecture and the software stack explicitly designed for distributed computing environments exploiting Internet of Things technologies (IoT).
Efficient exploration of discrete energy landscapes
Creators: name: Mann, Martin
name: Klemm, Konstantin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biomolecules (q-bio.BM)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Many physical and chemical processes, such as folding of biopolymers, are best described as dynamics on large combinatorial energy landscapes. A concise approximate description of dynamics is obtained by partitioning the micro-states of the landscape into macro-states. Since most landscapes of interest are not tractable analytically, the probabilities of transitions between macro-states need to be extracted numerically from the microscopic ones, typically by full enumeration of the state space. Here we propose to approximate transition probabilities by a Markov chain Monte-Carlo method. For landscapes of the number partitioning problem and an RNA switch molecule we show that the method allows for accurate probability estimates with significantly reduced computational cost.
description: 7 pages, 5 figures
Transformer-based Dual Relation Graph for Multi-label Image Recognition
Creators: name: Zhao, Jiawei
name: Yan, Ke
name: Zhao, Yifan
name: Guo, Xiaowei
name: Huang, Feiyue
name: Li, Jia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The simultaneous recognition of multiple objects in one image remains a challenging task, spanning multiple events in the recognition field such as various object scales, inconsistent appearances, and confused inter-class relationships. Recent research efforts mainly resort to the statistic label co-occurrences and linguistic word embedding to enhance the unclear semantics. Different from these researches, in this paper, we propose a novel Transformer-based Dual Relation learning framework, constructing complementary relationships by exploring two aspects of correlation, i.e., structural relation graph and semantic relation graph. The structural relation graph aims to capture long-range correlations from object context, by developing a cross-scale transformer-based architecture. The semantic graph dynamically models the semantic meanings of image objects with explicit semantic-aware constraints. In addition, we also incorporate the learnt structural relationship into the semantic graph, constructing a joint relation graph for robust representations. With the collaborative learning of these two effective relation graphs, our approach achieves new state-of-the-art on two popular multi-label recognition benchmarks, i.e., MS-COCO and VOC 2007 dataset.
description: 10 pages, 5 figures. Published in ICCV 2021
Spin(7)-Manifolds and Multisymplectic Geometry
Creators: name: Kennon, Aaron
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We utilize Spin(7) identities to prove that the Cayley four-form associated to a torsion-free Spin(7)-Structure is non-degenerate in the sense of multisymplectic geometry. Therefore, Spin(7) geometry may be treated as a special case of multisymplectic geometry. We then capitalize on this relationship to make statements about Hamiltonian multivector fields and differential forms associated to torsion-free Spin(7)-Structures.
description: 17 pages, no figures
PSR J1856+0245: Arecibo Discovery of a Young, Energetic Pulsar Coincident with the TeV Gamma-ray Source HESS J1857+026
Creators: name: Hessels, J. W. T.
name: Nice, D. J.
name: Gaensler, B. M.
name: Kaspi, V. M.
name: Lorimer, D. R.
name: Champion, D. J.
name: Lyne, A. G.
name: Kramer, M.
name: Cordes, J. M.
name: Freire, P. C. C.
name: Camilo, F.
name: Ransom, S. M.
name: Deneva, J. S.
name: Bhat, N. D. R.
name: Cognard, I.
name: Crawford, F.
name: Jenet, F. A.
name: Kasian, L.
name: Lazarus, P.
name: van Leeuwen, J.
name: McLaughlin, M. A.
name: Stairs, I. H.
name: Stappers, B. W.
name: Venkataraman, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the discovery of the Vela-like radio pulsar J1856+0245 in the Arecibo PALFA survey. PSR J1856+0245 has a spin period of 81ms, a characteristic age of 21kyr, and a spin-down luminosity Edot = 4.6 x 10^36 ergs/s. It is positionally coincident with the TeV gamma-ray source HESS J1857+026, which has no other known counterparts. Young, energetic pulsars create wind nebulae, and more than a dozen pulsar wind nebulae have been associated with very-high-energy (100GeV-100TeV) gamma-ray sources discovered with the HESS telescope. The gamma-ray emission seen from HESS J1857+026 is potentially produced by a pulsar wind nebula powered by PSR J1856+0245; faint X-ray emission detected by ASCA at the pulsar's position supports this hypothesis. The inferred gamma-ray efficiency is epsilon_gamma = L_gamma/Edot = 3.1% (1-10TeV, for a distance of 9kpc), comparable to that observed in similar associations.
description: 13 pages, 1 figure, accepted for publication in The Astrophysical Journal Letters
Optimal algorithms of Gram-Schmidt type
Creators: name: Wilson, James B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Numerical Analysis (math.NA)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 15A63, 11E39, 68W10

description: Three algorithms of Gram-Schmidt type are given that produce an orthogonal decomposition of finite $d$-dimensional symmetric, alternating, or Hermitian forms over division rings. The first uses $d^3/3+O(d^2)$ ring operations with very simple implementation. Next, that algorithm is adapted in two new directions. One is an optimal sequential algorithm whose complexity matches the complexity of matrix multiplication. The other is a parallel NC algorithm with similar complexity.
description: 7 pages
Numerical Boundary Control of Multi-Dimensional Hyperbolic Equations
Creators: name: Herty, Michael
name: Hinzmann, Kai
name: Müller, Siegfried
name: Thein, Ferdinand
Publisher: name: RWTH Aachen University
Year: 2024
Subjects: Boundary feedback control
multi-dimensional hyperbolic problem
numerical dissipation
stabilization

description: 25 Seiten (2024). doi:10.48550/arXiv.2410.21890
Stability of persistent currents in a Bose-Einstein condensate confined in a toroidal trap
Creators: name: Ogren, M.
name: Kavoulakis, G. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Motivated by recent experiments in Bose-Einstein condensed atoms that have been confined in toroidal traps, we examine the stability of persistent currents in such systems. We investigate the extent that the stability of these currents may be tunable, and the possible difficulties in their creation and detection.
description: 6 pages, 5 figures
Measurable lower bounds on concurrence
Creators: name: Sargolzahi, Iman
name: Mirafzali, Sayyed Yahya
name: Sarbishaei, Mohsen
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive measurable lower bounds on concurrence of arbitrary mixed states, for both bipartite and multipartite cases. First, we construct measurable lower bonds on the purely algebraic bounds of concurrence [F. Mintert et al. (2004), Phys. Rev. lett., 92, 167902]. Then, using the fact that the sum of the square of the algebraic bounds is a lower bound of the squared concurrence, we sum over our measurable bounds to achieve a measurable lower bound on concurrence. With two typical examples, we show that our method can detect more entangled states and also can give sharper lower bonds than the similar ones.
description: 16 pages, 2 figures, 1 Appendix
Ground State Energy of Extended Hubbard Model by self-consistent RPA
Creators: name: Harir, S.
name: Bennai, M.
name: Boughaleb, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Using the SCRPA, we study the intersite interaction effect on the dynamics of N electrons system. We have considered an extended Hubbard model including intrasite and intersite interactions, and we have applied this model to a system of two neighbouring atoms containing a free electron. The application of SCRPA to this model allows us to study the intersite interaction effect on the ground state and the excitation energies of system. We show that the repulsive interaction between the electrons of the neighbouring atoms is the origin of an supplementary conductivity of the system.
description: 8 pages
Spectroscopy of luminous z>7 galaxy candidates and sources of contamination in z>7 galaxy searches
Creators: name: Capak, P.
name: Mobasher, B.
name: Scoville, N. Z.
name: McCracken, H.
name: Ilbert, O.
name: Salvato, M.
name: Menendez-Delmestre, K.
name: Aussel, H.
name: Carilli, C.
name: Civano, F.
name: Elvis, M.
name: Giavalisco, M.
name: Jullo, E.
name: Kartaltepe, J.
name: Leauthaud, A.
name: Koekemoer, A. M.
name: Kneib, J. -P.
name: LeFloch, E.
name: Sanders, D. B.
name: Schinnerer, E.
name: Shioya, Y.
name: Shopbell, P.
name: Tanaguchi, Y.
name: Thompson, D.
name: Willott, C. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present three bright z+ dropout candidates selected from deep Near-Infrared (NIR) imaging of the COSMOS 2 square degree field. All three objects match the 0.8-8um colors of other published z>7 candidates but are three magnitudes brighter, facilitating further study. Deep spectroscopy of two of the candidates covering 0.64-1.02um with Keck-DEIMOS and all three covering 0.94-1.10um and 1.52-1.80um with Keck-NIRSPEC detects weak spectral features tentatively identified as Ly-alpha at z=6.95 and z=7.69 in two of the objects. The third object is placed at z~1.6 based on a 24um and weak optical detection. A comparison with the spectral energy distributions of known z<7 galaxies, including objects with strong spectral lines, large extinction, and large systematic uncertainties in the photometry yields no objects with similar colors. However, the lambda>1um properties of all three objects can be matched to optically detected sources with photometric redshifts at z~1.8, so the non-detection in the i+ and z+ bands are the primary factors which favors a z>7 solution. If any of these objects are at z~7 the bright end of the luminosity function is significantly higher at z>7 than suggested by previous studies, but consistent within the statistical uncertainty and the dark matter halo distribution. If these objects are at low redshift, the Lyman-Break selection must be contaminated by a previously unknown population of low redshift objects with very strong breaks in their broad band spectral energy distributions and blue NIR colors. The implications of this result on luminosity function evolution at high redshift is discussed. We show that the primary limitation of z>7 galaxy searches with broad filters is the depth of the available optical data.
description: 15 Pages, 15 figures, accepted to ApJ
Opinion polarization in the Receipt-Accept-Sample model
Creators: name: Kulakowski, Krzysztof
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The Zaller theory of opinion formation is reformulated with one free parameter $μ$, which measures the largest possible ideological distance which can be made by a citizen in one mental step. Our numerical results show the transient effects: {\it i)} the political awareness, measured by the number of received messages, increases with time first exponentially, later linearly; {\it ii)} for small $μ$ correlations are present between previously and newly received messages; {\it iii)} these correlation lead to a hyperdiffusion effect in the space of attitudes of messages. Citizens with small $μ$ are more prone to extremal opinions.
description: 13 pages, 6 figures; text improved, thanks to Referees
SU(2) chiral perturbation theory for Kl3 decay amplitudes
Creators: name: Flynn, J. M.
name: Sachrajda, C. T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We use one-loop $\SU(2)_L\times \SU(2)_R$ chiral perturbation theory ($\SU(2)$ ChPT) to study the behaviour of the form-factors for semileptonic $K\toπ$ decays with the pion mass at $q^2=0$ and at $q^2_{\textrm{max}}=(m_K-m_π)^2$, where $q$ is the momentum transfer. At $q^2=0$, the final-state pion has an energy of approximately $m_K/2$ (for $m_K\gg m_π$) and so is not soft, nevertheless it is possible to compute the chiral logarithms, i.e. the corrections of $O(m_π^2\log(m_π^2))$. We envisage that our results at $q^2=0$ will be useful in extrapolating lattice QCD results to physical masses. A consequence of the Callan-Treiman relation is that in the $\SU(2)$ chiral limit ($m_u=m_d=0$), the scalar form factor $f^0$ at $\qsqmax$ is equal to $f^{(K)}/f$, the ratio of the kaon and pion leptonic decay constants in the chiral limit. Lattice results for the scalar form factor at $\qsqmax$ are obtained with excellent precision, but at the masses at which the simulations are performed the results are about 25% below $f^{(K)}/f$ and are increasing only very slowly. We investigate the chiral behaviour of $f^0(\qsqmax)$ and find large corrections which provide a semi-quantitative explanation of the difference between the lattice results and $f^{(K)}/f$. We stress the generality of the relation $f^0_{P\toπ}(\qsqmax)=f^{(P)}/f$ in the $\SU(2)$ chiral limit, where $P=K,D$ or $B$ and briefly comment on the potential value of using this theorem in obtaining physical results from lattice simulations.
description: 20 pages, 4 figures