cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Relativistic treatment of the decay constants of light and heavy mesons
Creators: name: Ebert, D.
name: Faustov, R. N.
name: Galkin, V. O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Novel relativistic expressions are used to calculate the weak decay constants of pseudoscalar and vector mesons within the constituent quark model. Meson wave functions satisfy the quasipotential equation with the complete relativistic potential. New contributions, coming from the negative-energy quark states, are substantial for the light mesons, significantly decrease the values of their decay constants and, thus, bring them into agreement with experiment. For heavy-light mesons these contribution are much less pronounced, but permit to reduce uncertainties of the predicted decay constants. Their values agree with the results of lattice calculations and experimental data.
description: 9 pages, 1 figure, minor changes, version published in Phys.Lett.B
Microneedle Techniques for DNA Transdermal Delivery
Creators: name: Boonnada Pamornpathomkul
name: And Tanasait Ngawhirunpat
Publisher: name: Faculty of Pharmaceutical Sciences KKU, MSU, UBU
Year: 2015
Subjects: microneedle,transdermal DNA delivery,skin,permeation

description: 2, 11, Isan Journal ofPharmaceutical Sciences
Anomalous Hall resistivity and possible topological Hall effect in the EuAl$_4$ antiferromagnet
Creators: name: Shang, T.
name: Xu, Y.
name: Gawryluk, D. J.
name: Ma, J. Z.
name: Shiroka, T.
name: Shi, M.
name: Pomjakushina, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the observation of anomalous Hall resistivity in single crystals of EuAl$_4$, a centrosymmetric tetragonal compound, which exhibits coexisting antiferromagnetic (AFM) and charge-density-wave (CDW) orders with onset at $T_\mathrm{N} \sim 15.6$ K and $T_\mathrm{CDW} \sim 140$ K, respectively. In the AFM state, when the magnetic field is applied along the $c$-axis direction, EuAl$_4$ undergoes a series of metamagnetic transitions. Within this field range, we observe a clear hump-like anomaly in the Hall resistivity, representing part of the anomalous Hall resistivity. By considering different scenarios, we conclude that such a hump-like feature is most likely a manifestation of the topological Hall effect, normally occurring in noncentrosymmetric materials known to host nontrivial topological spin textures. In view of this, EuAl$_4$ would represent a rare case where the topological Hall effect not only arises in a centrosymmetric structure, but it also coexists with CDW order.
description: 7 pages, 4 figures, accepted by Phys. Rev. B (R)
Galaxy and Mass Assembly (GAMA): A $\textit{WISE}$ study of the activity of emission-line systems in G23
Creators: name: Yao, H. F. M.
name: Jarrett, T. H.
name: Cluver, M. E.
name: Marchetti, L.
name: Taylor, Edward N.
name: Santos, M. G.
name: Owers, Matt S.
name: Lopez-Sanchez, Angel R.
name: Gordon, Y. A.
name: Brown, M. J. I.
name: Brough, S.
name: Phillipps, S.
name: Holwerda, B. W.
name: Hopkins, A. M.
name: Wang, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed study of emission-line systems in the GAMA G23 region, making use of $\textit{WISE}$ photometry that includes carefully measured resolved sources. After applying several cuts to the initial catalogue of $\sim$41,000 galaxies, we extract a sample of 9,809 galaxies. We then compare the spectral diagnostic (BPT) classification of 1154 emission-line galaxies (38$\%$ resolved in W1) to their location in the $\textit{WISE}$ colour-colour diagram, leading to the creation of a new zone for mid-infrared "warm" galaxies located 2$σ$ above the star-forming sequence, below the standard $\textit{WISE}$ AGN region. We find that the BPT and $\textit{WISE}$ diagrams agree on the classification for 85$\%$ and 8$\%$ of the galaxies as non-AGN (star forming = SF) and AGN, respectively, and disagree on $\sim$7$\%$ of the entire classified sample. 39$\%$ of the AGN (all types) are broad-line systems for which the [\ion{N}{ii}] and [H$α$] fluxes can barely be disentangled, giving in most cases spurious [\ion{N}{ii}]/[H$α$] flux ratios. However, several optical AGN appear to be completely consistent with SF in $\textit{WISE}$. We argue that these could be low power AGN, or systems whose hosts dominate the IR emission. Alternatively, given the sometimes high [\ion{O}{iii}] luminosity in these galaxies, the emission lines may be generated by shocks coming from super-winds associated with SF rather than the AGN activity. Based on our findings, we have created a new diagnostic: [W1-W2] vs [\ion{N}{ii}]/[H$α$], which has the virtue of separating SF from AGN and high-excitation sources. It classifies 3$\sim$5 times more galaxies than the classic BPT
description: 43 pages, 32 figures, 4 tables
Conductivity in glass phases of disordered granular superconductors in magnetic fields
Creators: name: Ikeda, Ryusuke
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The electric conductivities in glass phases of three-dimensional (3D) granular superconductors in magnetic fields are examined based on a quantum disordered Josephson-junction array. A correct inclusion of the Ohmic dissipative dynamics leads to glass phases with divergent dc conductivity. In contrast, with no dissipative term, a metallic response in a glass phase is obtained irrespective of the range of correlation of quenched disorder, i.e., even in the so-called Bose-glass phase with experimentally vanishing resistivity.
description: publication version
BSDEs with stochastic Lipschitz condition and quadratic PDEs in Hilbert spaces
Creators: name: Briand, Philippe
name: Confortola, Fulvia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10, 35K55

description: This paper is devoted to the study of the differentiability of solutions to real-valued backward stochastic differential equations (BSDEs for short) with quadratic generators driven by a cylindrical Wiener process. The main novelty of this problem consists in the fact that the gradient equation of a quadratic BSDE has generators which satisfy stochastic Lipschitz conditions involving BMO martingales. We show some applications to the nonlinear Kolmogorov equations.
Reflective scattering from unitarity saturation
Creators: name: Troshin, S. M.
name: Tyurin, N. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Proceeding from optical analogy we propose a new physical interpretation of unitarity saturation leading to antishadowing as a reflective scattering. This interpretation of antishadowing is related to the non-perturbative aspects of strong interactions and follows from the specific property of the unitarity saturation when elastic $S$-matrix $S(s,b)|_{b=0}\to -1$ at $s\to \infty$. The analogy with Berry phase and experimental consequences of the proposed interpretation as reflective scattering at the LHC and in the cosmic rays studies are discussed.
description: 15 pages, 3 figures, extended version
High-power few-cycle near-infrared OPCPA for soft X-ray generation at 100 kHz
Creators: name: Hrisafov, Stefan
name: Pupeikis, Justinas
name: Chevreuil, Pierre-Alexis
name: Brunner, Fabian
name: Phillips, Christopher R.
name: Gallmann, Lukas
name: Keller, Ursula
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a near-infrared optical parametric chirped-pulse amplifier (OPCPA) and soft X-ray (SXR) high-harmonic generation system. The OPCPA produces few-cycle pulses at a center wavelength of 800 nm and operates at a high repetition rate of 100 kHz. It is seeded by fully programmable amplitude and phase controlled ultra-broadband pulses from a Ti:sapphire oscillator. The output from the OPCPA system was compressed to near-transform-limited 9.3-fs pulses. High-power operation up to an average power of 35 W was achieved, and a fully characterized pulse compression was recorded for a power level of 22.5 W, demonstrating pulses with a peak power greater than 21 GW. We demonstrate that at such high repetition rates, spatiotemporally flattened pump pulses can be achieved through a cascaded second-harmonic generation approach with an efficiency of more than 70%, providing a compelling OPCPA architecture for power-scaling ultra-broadband systems in the near-infrared. The output of this 800-nm OPCPA system was used to generate SXR radiation reaching 190 eV photon energy through high-harmonic generation in helium.
Dipole-dipole instability of atom clouds in a far-detuned optical dipole trap
Creators: name: Nagy, D.
name: Domokos, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The effect of the dipole-dipole interaction on the far-off-resonance optical dipole trapping scheme is calculated by a mean-field approach. The trapping laser field polarizes the atoms and the accompanying dipole-dipole energy shift deepens the attractive potential minimum in a pancake-shaped cloud. At high density the thermal motion cannot stabilize the gas against self-contraction and an instability occurs. We calculate the boundary of the stable and unstable equilibrium regions on a two-dimensional phase diagram of the atom number and the ratio of the trap depth to the temperature. We discuss the limitations imposed by the dipole-dipole instability on the parameters needed to reach Bose-Einstein condensation in an optical dipole trap.
description: 8 pages, 3 figures
Precise astrometry and diameters of asteroids from occultations -- a data-set of observations and their interpretation
Creators: name: Herald, David
name: Gault, David
name: Anderson, Robert
name: Dunham, David
name: Frappa, Eric
name: Hayamizu, Tsutomu
name: Kerr, Steve
name: Miyashita, Kazuhisa
name: Moore, John
name: Pavlov, Hristo
name: Preston, Steve
name: Talbot, John
name: Timerson, Brad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Occultations of stars by asteroids have been observed since 1961, increasing from a very small number to now over 500 annually. We have created and regularly maintain a growing data-set of more than 5,000 observed asteroidal occultations. The data-set includes: the raw observations; astrometry at the 1 mas level based on centre of mass or figure (not illumination); where possible the asteroid's diameter to 5 km or better, and fits to shape models; the separation and diameters of asteroidal satellites; and double star discoveries with typical separations being in the tens of mas or less. The data-set is published at NASA's Planetary Data System and is regularly updated. We provide here an overview of the data-set, discuss the issues associated with determining the astrometry and diameters, and give examples of what can be derived from the data-set. We also compare the occultation diameters of asteroids with the diameters measured by the satellites NEOWISE, AKARI AcuA, and IRAS, and show that the best satellite-determined diameter is a combination of the diameters from all three satellites.
description: As accepted, MNRAS
ตัวแบบแนะนำสำหรับการจัดสรรทรัพยากรบนการทำงานด้วยเทคโนโลยีเสมือนโดยการใช้ฟัซซี่ลอจิก
Creators: name: รัตนเดช ชมภูนุช
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: เครื่องเสมือน, ฟัซซี, การบริหารจัดการทรัพยากรของเครื่องเสมือน, ภาระงาน

description: 4, 34, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Comments on "Charged particle dynamics in the field of slowly rotating compact star"
Creators: name: Jamil, Mubasher
name: Qadir, Asghar
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: B.M. Mirza \cite{1} presented a solution of coupled Einstein-Maxwell equations for a slowly rotating neutron star; however his derivations had some errors and implicit assumptions that rendered the solution invalid. We point out the errors and present a mathematically consistent solution. The resulting solution is also physically consistent as it remains finite in the no rotation limit, whereas Mirza's solution diverges for zero rotation.
description: 4 pages; paper presented at the "first Italian Pakistan workshop on relativistic astrophysics" June 20-22, 2007
Collisional energy loss and the Chiral Magnetic Effect
Creators: name: Hansen, Jeremy
name: Tuchin, Kirill
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Collisional energy loss of a fast particle in a medium is mostly due to the medium polarization by the electromagnetic fields of the particle. A small fraction of energy is carried away by the Cherenkov radiation. In chiral medium there is an additional contribution to the energy loss due to induction of the anomalous current proportional to the magnetic field. It causes the particle to lose energy mostly in the form of the \emph{chiral} Cherenkov radiation. We employ classical electrodynamics, adequate in a wide range of particle energies, to compute the collisional energy loss by a fast particle in a homogenous chiral plasma and apply the results to Quark-Gluon Plasma and a Weyl semimetal. In the later case photon spectrum is strongly enhanced in the ultraviolet and X-ray regions which makes it amenable to experimental investigation. Our main observation is that while the collisional energy loss in a non-chiral medium is a slow, at most logarithmic, function of energy $E$, the chiral Cherenkov radiation is proportional to $E^2$ when the recoil is neglected and to $E$ when it is taken into account.
description: 13 pages, 2 figures
สเปกตรัมความนำไฟฟ้าของการส่งผ่านของอิเล็กตรอนในระบบรอยต่อระหว่างโลหะและโลหะ
Creators: name: ปัทมา เร่งพิมาย
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: สเปกตรัมความนำ, รอยต่อระหว่างโลหะ, โลหะ, การส่งผ่านของอิเล็กตรอน

description: 4, 34, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Computational studies of light acceptance and propagation in straight and curved multimodal active fibres
Creators: name: Achenbach, Patrick
name: Cobb, John H
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A Monte Carlo simulation has been performed to track light rays in cylindrical multimode fibres by ray optics. The trapping efficiencies for skew and meridional rays in active fibres and distributions of characteristic quantities for all trapped light rays have been calculated. The simulation provides new results for curved fibres, where the analytical expressions are too complex to be solved. The light losses due to sharp bending of fibres are presented as a function of the ratio of curvature to fibre radius and bending angle. It is shown that a radius of curvature to fibre radius ratio of greater than 65 results in a light loss of less than 10% with the loss occurring in a transition region at bending angles of pi/8 rad.
description: 21 pages, 13 figures
ปริทัศน์ของไอออนิคลิควิดเพื่อเป็นตัวเร่งปฏิกิริยาผลิตไบโอดีเซล
Creators: name: Ramadhan, Anisa Rizky
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: ไอออนิคลิควิด, ไบโอดีเซล, ตัวทำละลาย, ตัวเร่งปฏิกิริยา

description: 4, 34, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Multi-wavelength high energy gas-filled fiber Raman laser spanning from 1.53 um to 2.4 um
Creators: name: Adamu, Abubakar I.
name: Wang, Yazhou
name: Habib, MD. Selim
name: Dasa, Manoj. K.
name: Antonio-Lopez, J. E
name: Amezcua-Correa, Rodrigo
name: Bang, Ole
name: Markos, Christos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this work, we present a high pulse energy multi-wavelength Raman laser spanning from 1.53 um up to 2.4 um by employing the cascaded rotational stimulated Raman scattering (SRS) effect in a 5-m hydrogen (H2) -filled nested anti-resonant fiber (NARF), pumped by a linearly polarized Er/Yb fiber laser with a peak power of ~13 kW and pulse duration of ~7 ns in the C-band. The developed Raman laser has distinct lines at 1683 nm, 1868 nm, 2100 nm, and 2400 nm, with pulse energies as high as 18.25 uJ, 14.4 uJ, 14.1 uJ, and 8.2 uJ, respectively. We demonstrate how the energy in the Raman lines can be controlled by tuning the H2 pressure from 1 bar to 20 bar
Scanning Near-Field Optical Coherent Spectroscopy of Single Molecules at 1.4 Kelvin
Creators: name: Gerhardt, I.
name: Wrigge, G.
name: Agio, M.
name: Bushev, P.
name: Zumofen, G.
name: Sandoghdar, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present scanning near-field extinction spectra of single molecules embedded in a solid matrix. By varying the molecule-tip separation, we modify the line shape of the spectra, demonstrating the coherent nature of the interaction between the incident laser light and the excited state of the molecule. We compare the measured data with the outcome of numerical calculations and find a very good agreement.
description: 3 pages, 5 figures, submitted to Optics Letters
สารยับยั้งเอนไซม์ไซโคลออกซีจีเนสกับการรักษามะเร็ง
Creators: name: เบญจพร บุราณรัตน์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2558
Subjects: สารยับยั้งเอนไซม์ไซโคลออกซีจีเนส, ยาแก้อักเสบ, มะเร็ง

description: 4, 34, วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยมหาสารคาม
Depletion and low gas temperature in the L183 prestellar core : the N2H+ - N2D+ tool
Creators: name: Pagani, Laurent
name: Bacmann, Aurore
name: Cabrit, Sylvie
name: Vastel, Charlotte
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context. The study of pre-stellar cores (PSCs) suffers from a lack of undepleted species to trace the gas physical properties in their very dense inner parts. Aims. We want to carry out detailed modelling of N2H+ and N2D+ cuts across the L183 main core to evaluate the depletion of these species and their usefulness as a probe of physical conditions in PSCs. Methods. We have developed a non-LTE (NLTE) Monte-Carlo code treating the 1D radiative transfer of both N2H+ and N2D+, making use of recently published collisional coefficients with He between individual hyperfine levels. The code includes line overlap between hyperfine transitions. An extensive set of core models is calculated and compared with observations. Special attention is paid to the issue of source coupling to the antenna beam. Results. The best fitting models indicate that i) gas in the core center is very cold (7$\pm$ 1 K) and thermalized with dust, ii) depletion of N2H+ does occur, starting at densities 5-7E5 cm−3 and reaching a factor of 6 (+13/−3) in abundance, iii) deuterium fractionation reaches ∼70% at the core center, and iv) the density profile is proportional to r^-1 out to ∼4000 AU, and to r^−2 beyond. Conclusions. Our NLTE code could be used to (re-)interpret recent and upcoming observations of N2H+ and N2D+ in many pre-stellar cores of interest, to obtain better temperature and abundance profiles.
Le aggregazioni tra imprese sociali. Il caso CGM
Creators: name: Ranavolo, Roberta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: La diffusione e la crescita delle aziende non profit negli anni recenti , in Italia, ha determinato un ulteriore sviluppo di questo fenomeno rappresentato anche dalla nascita di aggregazioni tra aziende non profit. L' idea della ricerca è quella di indagare il fenomeno dei consorzi
realizzati tra imprese sociali, cercando di delinearne la specificità e sopratutto approfondire la configurazione e le caratteristiche della stessa in ordine ai sistemi organizzativi, gestionali e informativi.
Ultra-bright multiplexed energy-time entangled photon generation from lithium niobate on insulator chip
Creators: name: Xue, Guang-Tai
name: Niu, Yun-Fei
name: Liu, Xiaoyue
name: Duan, Jia-Chen
name: Chen, Wenjun
name: Pan, Ying
name: Jia, Kunpeng
name: Wang, Xiaohan
name: Liu, Hua-Ying
name: Zhang, Yong
name: Xu, Ping
name: Zhao, Gang
name: Cai, Xinlun
name: Gong, Yan-Xiao
name: Hu, Xiaopeng
name: Xie, Zhenda
name: Zhu, Shining
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-flux entangled photon source is the key resource for quantum optical study and application. Here it is realized in a lithium niobate on isolator (LNOI) chip, with 2.79*10^11 Hz/mW photon pair rate and 1.53*10^9 Hz/nm/mW spectral brightness. These data are boosted by over two orders of magnitude compared to existing technologies. A 130-nm broad bandwidth is engineered for 8-channel multiplexed energy-time entanglement. Harnessed by high-extinction frequency correlation and Franson interferences up to 99.17% visibility, such energy-time entanglement multiplexing further enhances high-flux data rate, and warrants broad applications in quantum information processing on a chip.
description: Submitted
XMM-Newton study of 0.012
Creators: name: Finoguenov, A.
name: Ponman, T. J.
name: Osmond, J. P. F.
name: Zimer, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the thermodynamic properties of the hot gas in a sample of groups in the 0.012-0.024 redshift range, using XMM-Newton observations. We present measurements of temperature, entropy, pressure and iron abundance. Non-parametric fits are used to derive the mean properties of the sample and to study dispersion in the values of entropy and pressure. The scaling of the entropy at 0.2r500 matches well the results of Ponman et al. (2003). However, compared to cool clusters, the groups in our sample reveal larger entropy at inner radii and a substantially flatter slope in the entropy in the outskirts, compared to both the prediction of pure gravitational heating and to observations of clusters. This difference corresponds to the systematically flatter group surface brightness profiles, reported previously. The scaled pressure profiles can be well approximated with a Sersic model with n=4. We find that groups exhibit a systematically larger dispersion in pressure, compared to clusters of galaxies, while the dispersion in entropy is similar.
description: 11 pages, MNRAS in press, the 25 page version with all 176 figures included is at ftp://ftp.xray.mpe.mpg.de/people/alexis/2dxgs_astroph.ps.gz
Heterogeneity in Outcomes of Repeated Instances of Percolation Experiments
Creators: name: Kuehn, Reimer
name: van Mourik, Jort
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the heterogeneity of outcomes of repeated instances of percolation experiments in complex networks using a message passing approach to evaluate heterogeneous, node dependent probabilities of belonging to the giant or percolating cluster, i.e. the set of mutually connected nodes whose size scales linearly with the size of the system. We evaluate these both for large finite single instances, and for synthetic networks in the configuration model class in the thermodynamic limit. For the latter, we consider both Erdos-Renyi and scale free networks as examples of networks with narrow and broad degree distributions respectively. For real-world networks we use an undirected version of a Gnutella peer-to-peer file-sharing network with $N=62,568$ nodes as an example. We derive the theory for multiple instances of both uncorrelated and correlated percolation processes. For the uncorrelated case, we also obtain a closed form approximation for the large mean degree limit of Erdos-Renyi networks.
description: 14 pages, 6 multipart figures
Crossed Threshold Resummation
Creators: name: Sterman, George
name: Vogelsang, Werner
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that certain general properties of threshold and joint resummations in Drell-Yan cross sections hold as well for their crossed analogs in semi-inclusive deep-inelastic scattering and double-inclusive leptonic annihilation. We show that all plus-distribution corrections near threshold show the same structure, and are determined to all logarithmic order by two anomalous dimensions, one of which is a generalization of the D-term previously derived in Drell-Yan. We also discuss the possibility of universality in power corrections implied by the resummation.
description: 8 pages
Precision study of the eta-3He system using the d+p->3He+eta reaction
Creators: name: Mersmann, T.
name: Khoukaz, A.
name: Büscher, M.
name: Chiladze, D.
name: Dymov, S.
name: Hartmann, M.
name: Hejny, V.
name: Kacharava, A.
name: Keshelashvili, I.
name: Kulessa, P.
name: Maeda, Y.
name: Mielke, M.
name: Mikirtychiants, S.
name: Ohm, H.
name: Papenbrock, M.
name: Prasuhn, D.
name: Rathmann, F.
name: Rausmann, T.
name: Schleichert, R.
name: Serdyuk, V.
name: Stein, H. -J.
name: Ströher, H.
name: Täschner, A.
name: Valdau, Yu.
name: Wilkin, C.
name: Wrońska, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The differential and total cross sections for the d+p->3He+eta reaction have been measured in a high precision high statistics COSY-ANKE experiment near threshold using a continuous beam energy ramp up to an excess energy Q of 11.3 MeV with essentially 100% acceptance. The kinematics allowed the mean value of Q to be determined to about 9 keV. Evidence is found for the effects of higher partial waves for Q>4 MeV. The very rapid rise of the total cross section to its maximum value within 0.5 MeV of threshold implies a very large eta-3He scattering length and hence the presence of a quasi-bound state extremely close to threshold.
description: 4 pages, 4 figures, 1 table, submitted to Phys. Rev. Lett
Minority stress e transgenderismi. Effetti dello stigma vissuto ed interiorizzato e dei fattori protettivi sulla salute mentale di un campione di persone transgender italiane
Creators: name: Scandurra, Cristiano
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Le persone transgender vivono violenze ed oppressioni continue e sistematiche a causa della propria non conformità di genere rappresentando una popolazione altamente stigmatizzata e a rischio di esperire problematiche di salute mentale. Un modello teorico di grande utilità per comprendere le cause di queste problematiche e gli effetti dello stigma sociale è quello del minority stress (Meyer, 1995; 2003; 2007). Nonostante ciò, fino a pochissimi anni fa, le persone transgender sono state inspiegabilmente lasciate fuori dalle ricerche che si sono occupate di studiare gli effetti di questo particolare stress sulla salute mentale. È solo di recente che si è cominciato ad applicare questo modello alle differenti identità transgender (Bockting et al., 2013; Hendricks & Testa, 2012). In Italia, contrariamente agli USA, studi applicativi di questo modello indirizzati alla popolazione transgender sono ancora molto scarsi.
Il presente lavoro di ricerca, di natura quantitativa, si è proposto di applicare il modello del minority stress ad un campione di persone transgender italiane (N = 149), analizzando gli effetti dello stigma vissuto ed interiorizzato e dei fattori protettivi sulla salute mentale.
I risultati sostengono la validità teorica e clinica dell'utilizzo di questa prospettiva per meglio comprendere gli effetti diretti ed indiretti della violenza sulla salute mentale delle persone transgender. Uno sguardo particolare è stato indirizzato al ruolo della transfobia interiorizzata, lo stressor più soggettivo ed insidioso la cui presenza aumenta di gran lunga la possibilità di sviluppare problematiche di salute mentale. I risultati ottenuti nel presente lavoro di ricerca sono stati, infine, analizzati nel loro risvolto psicologico-clinico, discutendone le implicazioni legate agli interventi di counselling e/o di psicoterapia rivolti alle persone transgender.
Theory of reduced singlet pairing without the underlying state of charge stripes in the high-temperature superconductor YBa_2Cu_3O_6.45
Creators: name: Yamase, Hiroyuki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recently, a strongly enhanced xy anisotropy of magnetic excitations was observed in YBa_2Cu_3O_y (YBCO_y) with y=6.45 and Tc=35 K [Science 319, 597 (2008)]. Unlike the observation in YBCO_6.6 and YBCO_6.85, the anisotropy grows to be pronounced at lower temperature and at lower energy, and is not suppressed by the onset of superconductivity. We propose that the effect of singlet pairing is substantially reduced in YBCO_6.45. This reduction concomitantly enhances an order competing with singlet pairing, a strong tendency of the so-called d-wave Pomeranchuk instability, leading to the magnetic excitations observed experimentally.
description: 11 pages, 4 figures, published version
The Operational Choi-Jamiolkowski Isomorphism
Creators: name: Adlam, Emily
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article, I use an operational formulation of the Choi-Jamiołkowski isomorphism to explore an approach to quantum mechanics in which the state is not the fundamental object. I first situate this project in the context of generalized probabilistic theories and argue that this framework may be understood as a means of drawing conclusions about the intratheoretic causal structure of quantum mechanics which are independent of any specific ontological picture. I then give an operational formulation of the Choi-Jamiołkowski isomorphism and show that in an operational theory which exhibits this isomorphism, several features of the theory which are usually regarded as properties of the quantum state can be derived from constraints on non-local correlations. This demonstrates that there is no need to postulate states to be the bearers of these properties, since they can be understood as consequences of a fundamental equivalence between multipartite and temporal correlations.
The role of raised intracranial pressure in the progression and refractoriness of migraine. A pilot study.
Creators: name: Ranieri, Angelo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: To assess the prevalence and possible pathogenetic involvement of raised intracranial pressure in patients presenting with unresponsive chronic migraine (CM), the intracranial opening pressure (OP) and the clinical outcome of a single cerebrospinal fluid withdrawal by lumbar puncture (LP) has been evaluated in 44 consecutive patients, diagnosed with unresponsive CM and evidence of sinus stenosis at magnetic resonance venography. The large majority of patients complained of daily or near-daily headache. Thirty-eight (86.4%) had an OP >200 mmH2O. Normalization of intracranial pressure by LP resulted in prompt remission of chronic pain in 34/44 patients (77.3%) and an episodic pattern of headache was maintained for 2, 3 and 4 months in 24 (54.6%), 20 (45.4%) and 17 (38.6%) patients, respectively. The medians of overall headache days/month and of disabling headache days/month significantly decreased (p<0.0001) at each follow-up versus baseline. Despite the absence of papilledema, 31/44 (70.5%) patients fulfilled diagnostic criteria for "Headache attributed to Intracranial Hypertension". Our findings indicate that most patients diagnosed with unresponsive CM in specialized headache clinics may present an increased intracranial pressure involved in the progression and refractoriness of pain. Moreover, a single LP with cerebrospinal fluid withdrawal results in sustained remission of chronic pain in many cases. Prospective controlled studies are needed before this procedure can be translated into clinical practice.
On the spacing distribution of the Riemann zeros: corrections to the asymptotic result
Creators: name: Bogomolny, E.
name: Bohigas, O.
name: Leboeuf, P.
name: Monastra, A. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: It has been conjectured that the statistical properties of zeros of the Riemann zeta function near $z = 1/2 + \ui E$ tend, as $E \to \infty$, to the distribution of eigenvalues of large random matrices from the Unitary Ensemble. At finite $E$ numerical results show that the nearest-neighbour spacing distribution presents deviations with respect to the conjectured asymptotic form. We give here arguments indicating that to leading order these deviations are the same as those of unitary random matrices of finite dimension $N_{\rm eff}=\log(E/2π)/\sqrt{12 Λ}$, where $Λ=1.57314 ...$ is a well defined constant.
description: 9 pages, 3 figures
C++QED: An object-oriented framework for wave-function simulations of cavity QED systems
Creators: name: Vukics, A.
name: Ritsch, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a framework for efficiently performing Monte Carlo wave-function simulations in cavity QED with moving particles. It relies heavily on the object-oriented programming paradigm as realised in C++, and is extensible and applicable for simulating open interacting quantum dynamics in general. The user is provided with a number of ``elements'', eg pumped moving particles, pumped lossy cavity modes, and various interactions to compose complex interacting systems, which contain several particles moving in electromagnetic fields of various configurations, and perform wave-function simulations on such systems. A number of tools are provided to facilitate the implementation of new elements.
description: 31 pages, 8 figures, 3 tables
Stokes-polarimeter for 1-meter telescope
Creators: name: Afanasiev, Victor
name: Shablovinskaya, Elena
name: Uklein, Roman
name: Malygin, Eugene
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the "StoP" photometer-polarimeter (Stokes-polarimeter) used for observations with the 1-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences since the beginning of 2020. We describe the instrument and its parameters in observations performed in the photometric and polarimetric modes. We demonstrate the capabilities of the instrument through the polarimetry of the blazar S5 0716+714 and compare the results with those earlier obtained with the 6-m telescope.
description: Accepted for publication in Astrophysical Bulletin
First Nonperturbative Test of a Relativistic Heavy Quark Action in Quenched Lattice QCD
Creators: name: Kayaba, Y.
name: Aoki, S.
name: Fukugita, M.
name: Iwasaki, Y.
name: Kanaya, K.
name: Kuramashi, Y.
name: Okawa, M.
name: Ukawa, A.
name: Yoshie, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We perform a numerical test of a relativistic heavy quark(RHQ) action, recently proposed by Tsukuba group, in quenched lattice QCD at $a\simeq 0.1$ fm. With the use of the improvement parameters previously determined at one-loop level for the RHQ action, we investigate a restoration of rotational symmetry for heavy-heavy and heavy-light meson systems around the charm quark mass. We focused on two quantities, the meson dispersion relation and the pseudo-scalar meson decay constants. It is shown that the RHQ action significantly reduces the discretization errors due to the charm quark mass. We also calculate the S-state hyperfine splittings for the charmonium and charmed-strange mesons and the $D_s$ meson decay constant. The remaining discretization errors in the physical quantities are discussed.
description: 21 pages, 16 figures. A reference and a comment added, a major modification in appendix, several minor changes in the abstract and the main text. Errors in affiliation are corrected. Version appeared in JHEP
Preserving the past while planning for the future: the city of York’s approach to managing the archaeological heritage
Creators: name: Eberherr, Sherida
Publisher: name: University of British Columbia
Year: 2009

description: In 1991 the City of York in England adopted a policy to manage its archaeological heritage. The policy was in response to national directives that sought to locate the management of the sub-surface resource within the local planning process. This approach was pursued in order to ameliorate the costly and often controversial problems that had occurred when planning consent was given without the consideration of the archaeological potential of a site. The research examines the planning dilemma of how to create a policy that balances the economic value of regeneration and the historic value of the archaeological resource. The intention of this study is to assess the success of the policy adopted in York in terms of an overall planning framework that allows planners to meet the requirements of the living community, while preserving the archaeological heritage; as well as the policy's success in meeting its own aims and objectives. To understand the situation thoroughly, a holistic approach combining field research and library research was undertaken. Basic data sources include in-depth interviews with a diverse group of stockholders including archaeologists, planners, politicians, developers, architects and amenity group leaders; and primary and secondary documents which include policy statements, newspaper articles, journals, monographs and books. The research for the study suggests that overall the policy has accomplished the majority of its aims and objectives. In particular, it facilitates development while preserving the archaeological heritage. To ensure the continued success of the policy, however, it is critical that steps are taken to integrated it more comprehensively into the larger domain of planning responsibilities.
Cellular neural networks for NP-hard optimization problems
Creators: name: Ercsey-Ravasz, Mária
name: Roska, Tamás
name: Néda, Zoltán
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Nowadays, Cellular Neural Networks (CNN) are practically implemented in parallel, analog computers, showing a fast developing trend. Physicist must be aware that such computers are appropriate for solving in an elegant manner practically important problems, which are extremely slow on the classical digital architecture. Here, CNN is used for solving NP-hard optimization problems on lattices. It is proved, that a CNN in which the parameters of all cells can be separately controlled, is the analog correspondent of a two-dimensional Ising type (Edwards-Anderson) spin-glass system. Using the properties of CNN computers a fast optimization method can be built for such problems. Estimating the simulation time needed for solving such NP-hard optimization problems on CNN based computers, and comparing it with the time needed on normal digital computers using the simulated annealing algorithm, the results are astonishing: CNN computers would be faster than digital computers already at 10*10 lattice sizes. Hardwares realized nowadays are of 176*144 size. Also, there seems to be no technical difficulties adapting CNN chips for such problems and the needed local control is expected to be fully developed in the near future.
Harmonic oscillators coupled by springs: discrete solutions as a Wigner Quantum System
Creators: name: Lievens, S.
name: Stoilova, N. I.
name: Van der Jeugt, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a quantum system consisting of a one-dimensional chain of M identical harmonic oscillators with natural frequency $ω$, coupled by means of springs. Such systems have been studied before, and appear in various models. In this paper, we approach the system as a Wigner Quantum System, not imposing the canonical commutation relations, but using instead weaker relations following from the compatibility of Hamilton's equations and the Heisenberg equations. In such a setting, the quantum system allows solutions in a finite-dimensional Hilbert space, with a discrete spectrum for all physical operators. We show that a class of solutions can be obtained using generators of the Lie superalgebra gl(1|M). Then we study the properties and spectra of the physical operators in a class of unitary representations of gl(1|M). These properties are both interesting and intriguing. In particular, we can give a complete analysis of the eigenvalues of the Hamiltonian and of the position and momentum operators (including multiplicities). We also study probability distributions of position operators when the quantum system is in a stationary state, and the effect of the position of one oscillator on the positions of the remaining oscillators in the chain.
A high resolution multi-phase clock Time-Digital Convertor implemented on Kintex-7 FPGA
Creators: name: Dong, Xue
name: Ma, Cong
name: Zhao, Xiaokun
name: Li, Xing
name: Huang, Zhenqiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Time-digital Converter (TDC) aims to measure the arrival time of the leading edge of the pulse signal. Our recent work presented a high resolution multi-phase TDC based on the Kintex-7 Field Programmable Gate Array (FPGA) device. A simple I/O tile based circular input buffer is employed to oscillate the input signal periodically, and then a multi-phase TDC based on ISERDES core with a 625 ps bin size is used to accomplish the multiple measurements for getting higher resolution performance. In this paper, the design concept, architecture, as well as kernel implementation considerations are all discussed. To evaluate the TDC's performance, we built a verification system based on Kintex-7 FPGA. Initial test results indicate that the TDC's effective bin size is successfully reduced from 625 ps to 78.125 ps, and the measured dual-channel time resolution is better than 35 ps RMS.
description: 10 pages,9 figures,1 table,accepted by Journal of Instrumentation,2020
Un contributo sull'analisi delle difettosità geometriche del binario ai fini della manutenzione delle linee ferroviarie
Creators: name: Miraglia, Elisabetta
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2015

description: Nella gestione delle infrastrutture ferroviarie assume notevole importanza il monitoraggio della difettosità del binario.
La difettosità del binario insieme a quella plano-altimetrica della linea e delle componenti meccanico-inerziali del veicolo, rappresenta una delle principali cause di instabilità di marcia, che generalmente evolve in veri e propri casi di svio. La diagnosi precoce di tali difetti, è necessaria per intervenire prima che si verifichino eventi disastrosi e pericolosi per l'utenza.
Nelle ultime decadi si stanno diffondendo sul mercato molteplici tecniche ad elevato rendimento, basate sull'utilizzo di diverse tecnologie tra cui quella legata all'uso di profilometri laser. Numerosissimi sono i dispositivi proprietari specializzati per il monitoraggio complementare della ruota e della rotaia, ma generalmente tali strumentazioni richiedono grossi investimenti iniziali. Tali sistemi di monitoraggio sono, però, privi di giustificazioni tecnico-scientifiche relative alle loro prestazioni, e non sottoposti ad alcuna regola che ne uniformi la produzione.
Altrettanto diffusi sono i mezzi specializzati che effettuano periodicamente le operazioni di manutenzione della linea ferroviaria al fine di contenerne il degrado.
Il degrado della linea ferroviaria, in riferimento a ciascuna componente della stessa, è ampiamente studiato in letteratura, ed esistono anche dei modelli utilizzati per valutare lo stato di degrado della linea e per programmare gli interventi di manutenzione in modo da ottimizzare i costi di gestione. Tali modelli, dall'impronta fortemente empirica, andrebbero arricchiti completati e perfezionati, al fine di renderli versatili rispetto ai più svariati casi, vicini alle realtà locali.
La proposta di una metodologia per lo sviluppo dei modelli di degrado delle linee ferroviarie richiede una chiara conoscenza dei fenomeni di dinamica di marcia, dell'interazione ruota-rotaia e del concetto di difettosità; necessaria per sviluppare criteri di omogeneizzazione del danno che non trascurino l'influenza che questi fenomeni hanno sul degrado della linea.
Assessing global demand for perishable commodities of Northern Australia – a case study of Central Queensland
Creators: name: Akbar,, Delwar;
name: Rolfe, John
name: Rahman, Azad
Publisher: name: Central Queensland University
Year: 2018
Subjects: 140218 Urban and Regional Economics

description: This study have investigated the factors which may affect (positively or negatively) exporting HVPACs in Asian countries from CQ. In light of theoretical domain of the factors have been categorized as centripetal (positive/pull) and centrifugal (negative/push) forces. Availability of skilled and unskilled labour forces in the agricultural sector of CQ is one of the centripetal forces which could help the HVPACs to grow to satisfy the international market demand. CQ has the setup of backward and forward linkage industries to promote exporting HVPACs. One of the major advantages of CQ is its location and proximity to the Asian markets which offer a competitive transportation cost to export HVPACs in Asian markets. There are few obstacles as well to promote HVPACs of CQ which could act as centrifugal forces on local economic dynamics. CQ has three regional airports but none of them has the infrastructure or logistics to operate international cargo flight. As a result the local producer have to ship their product to Brisbane for exporting which is time consuming and attract additional costs. In view of stakeholders, CQ needs to improve its irrigation facilities to increase the production of HVPACs. One of the barriers on exporting HVPACs is the labour cost which is comparatively higher than other competitor exporting countries. This study reveal that, in spite of some barrier CQ region has a great potential on exporting HVPACs in Asian markets.