cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Hipparcos parallax for Polaris
Creators: name: van Leeuwen, Floor
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: This letter follows a recent claim that the Hipparcos parallax for Polaris could be too small by 2.5 mas. It examines in detail the Hipparcos epoch astrometric data for Polaris, as well as the viability of other observations that were put forward to support a larger parallax. The Hipparcos determination of the Polaris parallax is shown to be sufficiently robust to fully exclude a significantly larger parallax, and there is no observational support from other observations, such as a supposed presence of a cluster, either.
description: 3 pages, 6 figures, Accepted for publication by A&A
title: Reliability and Validity of a New Taekwondo-Specific Change-of-Direction Speed Test With Striking Techniques in Elite Taekwondo Athletes: A Pilot Study
Creators: name: Aloui, Ali
name: Tayech, Amel
name: Arbi Mejri, Mohamed
name: Makhlouf, Issam
name: Clark, Cain C. T.
name: Granacher, Urs
name: Zouhal, Hassane
name: Ben Abderrahman, Abderraouf
Publisher: name: Universitätsverlag Potsdam
Year: 2022
Subjects: subject: 610 Medizin und Gesundheit

description: The purpose of this study was to examine the test-retest reliability, and convergent and discriminative validity of a new taekwondo-specific change-of-direction (COD) speed test with striking techniques (TST) in elite taekwondo athletes. Twenty (10 males and 10 females) elite (athletes who compete at national level) and top-elite (athletes who compete at national and international level) taekwondo athletes with an average training background of 8.9 ± 1.3 years of systematic taekwondo training participated in this study. During the two-week test-retest period, various generic performance tests measuring COD speed, balance, speed, and jump performance were carried out during the first week and as a retest during the second week. Three TST trials were conducted with each athlete and the best trial was used for further analyses. The relevant performance measure derived from the TST was the time with striking penalty (TST-TSP). TST-TSP performances amounted to 10.57 ± 1.08 s for males and 11.74 ± 1.34 s for females. The reliability analysis of the TST performance was conducted after logarithmic transformation, in order to address the problem of heteroscedasticity. In both groups, the TST demonstrated a high relative test-retest reliability (intraclass correlation coefficients and 90% compatibility limits were 0.80 and 0.47 to 0.93, respectively). For absolute reliability, the TST’s typical error of measurement (TEM), 90% compatibility limits, and magnitudes were 4.6%, 3.4 to 7.7, for males, and 5.4%, 3.9 to 9.0, for females. The homogeneous sample of taekwondo athletes meant that the TST’s TEM exceeded the usual smallest important change (SIC) with 0.2 effect size in the two groups. The new test showed mostly very large correlations with linear sprint speed (r = 0.71 to 0.85) and dynamic balance (r = −0.71 and −0.74), large correlations with COD speed (r = 0.57 to 0.60) and vertical jump performance (r = −0.50 to −0.65), and moderate correlations with horizontal jump performance (r = −0.34 to −0.45) and static balance (r = −0.39 to −0.44). Top-elite athletes showed better TST performances than elite counterparts. Receiver operating characteristic analysis indicated that the TST effectively discriminated between top-elite and elite taekwondo athletes. In conclusion, the TST is a valid, and sensitive test to evaluate the COD speed with taekwondo specific skills, and reliable when considering ICC and TEM. Although the usefulness of the TST is questioned to detect small performance changes in the present population, the TST can detect moderate changes in taekwondo-specific COD speed.
description: Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe; 789
Spectral and transport properties of time-periodic PT-symmetric tight-binding lattices
Creators: name: Della Valle, Giuseppe
name: Longhi, Stefano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the spectral properties and dynamical features of a time-periodic PT-symmetric Hamiltonian on a one-dimensional tight-binding lattice. It is shown that a high-frequency modulation can drive the system under a transition between the broken-PT and the unbroken-PT phases. The time-periodic modulation in the unbroken-PT regime results in a significant broadening of the quasi-energy spectrum, leading to a hyper-ballistic transport regime. Also, near the PT-symmetry breaking the dispersion curve of the lattice band becomes linear, with a strong reduction of quantum wave packet spreading.
description: 7 pages, 5 figures
Numerical study of flow separation control over a circular hump using synthetic jet actuators
Creators: name: Rona, Aldo
name: Ja’fari, Mohammad
name: Jaworski, Artur J.
Publisher: name: figshare
Year: 2022
Subjects: subject: 90101 Aerodynamics (excl. Hypersonic Aerodynamics)
subject: FOS: Mechanical engineering
subject: 99902 Engineering Instrumentation
subject: FOS: Other engineering and technologies

description: Present study deals with the wall resolved Unsteady Reynolds-Averaged Navier–Stokes (URANS) simulation of boundary layer flow separation over a circular hump model and its active control. An array of Synthetic Jet Actuators (SJAs) is implemented in the hump model to introduce a train of vortex rings into the boundary layer to control flow separation. OpenFOAM solver is used to numerically simulate and analyse the fluid flow using the k-omega SST model. Hot Wire Anemometry (HWA) and Particle Image Velocimetry (PIV) measurements are carried out to evaluate the accuracy of the URANS technique as well as the effectiveness of SJAs by comparing numerical predictions to experimental data. The time-averaged results are in a good agreement with experimental results and demonstrate a successful application of SJAs to delay the flow separation by the interactions of vortical structures with the separated shear flow. The three-dimensional simulation also reveals that near wall coherent flow structures (stream-wise and span-wise vortices) are responsible for the wall shear stress components. The results can be used to better understand the performance of SJAs and to further improve future actuator configurations.
3.3 μm PAH observations of the central kiloparsecs of Centaurus A
Creators: name: Tacconi-Garman, L. E.
name: Sturm, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Aims. The aim of this work is to further investigate the nature of PAH excitation and emission especially in the context of tracing star formation in a variety of extragalactic environments. Here we turn our attention to the energetic environment of the closest AGN in our sample, Centaurus A. Methods. Using ISAAC on the ESO VLT UT1 (Antu) we have made high spatial resolution 3.3 μm imaging observations of the central kiloparsec of CenA. These observations have been compared with star formation tracers in the near- and mid-infrared, as well as with mid-infrared tracers of nuclear activity. Results. The nucleus is not devoid of PAH emission, implying that the PAH particles are not destroyed in the nucleus as might be expected for such a harsh environment. However, we see the feature to continuum ratio decrease towards the AGN. As well, the 3.3 μm PAH feature emission generally traces the sites of star formation in Cen A, but in detail there are spatial offsets, consistent with an earlier study of the starburst galaxies NGC 253 and NGC 1808. However, the feature-to-continuum ratio does not drop at the positions of star formation as was previously seen in that earlier study. The cause for this difference remains uncertain. Finally, our data reveal possible evidence for a nearly face-on, circular or spiral, dust structure surrounding the nucleus.
description: Accepted for publication in A&A
Role of the Non-Collinear Polarizer Layer in Spin Transfer Torque Switching Processes
Creators: name: You, Chun-Yeol
name: Jung, Myung-Hwa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have recently reported that the spin transfer torque switching current density is very sensitive to not only the junction sizes but also the exchange stiffness constants of the free layer according to the micromagnetic simulations. The results are very complicate and far from the macro-spin model because of the non-coherent spin switching processes. The dependence of the switching current density on the junction sizes and the exchange stiffness constants becomes systematic when we employ the non-collinear polarizer layer. It is found that the non-collinear polarizer layer enhances the coherency of the spin dynamics by breaking symmetric spin configurations.
description: 5 figures
Computing the phase diagram of binary mixtures: a patchy particle case study
Creators: name: Rovigatti, Lorenzo
name: Heras, Daniel de las
name: Tavares, José Maria
name: da Gama, Margarida M. Telo
name: Sciortino, Francesco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the phase behaviour of 2D mixtures of bi-functional and three-functional patchy particles and 3D mixtures of bi-functional and tetra-functional patchy particles by means of Monte Carlo simulations and Wertheim theory. We start by computing the critical points of the pure systems and then we investigate how the critical parameters change upon lowering the temperature. We extend the Successive Umbrella Sampling method to mixtures to make it possible to extract information about the phase behaviour of the system at a fixed temperature for the whole range of densities and compositions of interest.
description: 13 pages, 13 figures
The Solar Connection of Enhanced Heavy Ion Charge States in the Interplanetary Medium: Implications for the Flux-rope Structure of CMEs
Creators: name: Gopalswamy, N.
name: MÄkelÄ, P.
name: Akiyama, S.
name: Xie, H.
name: Yashiro, S.
name: Reinard, A. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigated a set of 54 interplanetary coronal mass ejection (ICME) events whose solar sources are very close to the disk center (within 15 degrees from the central meridian). The ICMEs consisted of 23 magnetic cloud (MC) events and 31 non-MC events. Our analyses suggest that the MC and non-MC ICMEs have more or less the same eruption characteristics at the Sun in terms of soft X-ray flares and CMEs. Both types have significant enhancements in charge states, although the non-MC structures have slightly lower levels of enhancement. The overall duration of charge state enhancement is also considerably smaller than that than that in MCs as derived from solar wind plasma and magnetic signatures. We find very good correlation between the Fe and O charge state measurements and the flare properties such as soft X-ray flare intensity and flare temperature for both MCs and non-MCs. These observations suggest that both MC and non-MC ICMEs are likely to have a flux-rope structure and the unfavorable observational geometry may be responsible for the appearance of non-MC structures at 1 AU. We do not find any evidence for active region expansion resulting in ICMEs lacking a flux rope structure because the mechanism of producing high charge states and the flux rope structure at the Sun is the same for MC and non-MC events.
description: 42 pages, 18 figures, 3 tables, accepted for publication in Solar Physics
Kinetic Simulations of Plasmoid Chain Dynamics
Creators: name: Markidis, Stefano
name: Henri, Pierre
name: Lapenta, Giovanni
name: Divin, Andrey
name: Goldman, Martin
name: Newman, David
name: Laure, Erwin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The dynamics of a plasmoid chain is studied with three dimensional Particle-in-Cell simulations. The evolution of the system with and without a uniform guide field, whose strength is 1/3 the asymptotic magnetic field, is investigated. The plasmoid chain forms by spontaneous magnetic reconnection: the tearing instability rapidly disrupts the initial current sheet generating several small-scale plasmoids, that rapidly grow in size coalescing and kinking. The plasmoid kink is mainly driven by the coalescence process. It is found that the presence of guide field strongly influences the evolution of the plasmoid chain. Without a guide field, a main reconnection site dominates and smaller reconnection regions are included in larger ones, leading to an hierarchical structure of the plasmoid-dominated current sheet. On the contrary in presence of a guide field, plasmoids have approximately the same size and the hierarchical structure does not emerge, a strong core magnetic field develops in the center of the plasmoid in the direction of the existing guide field, and bump-on-tail instability, leading to the formation of electron holes, is detected in proximity of the plasmoids.
MPEC 2023-M26 : 2015 MT200
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Concerns on Monotonic Imbalance Bounding Matching Methods
Creators: name: Yatracos, Yannis G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: Applications (stat.AP)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Concerns are expressed for the Monotonic Imbalance Bounding (MIB) property (Iacus et al. 2011) and for MIB matching because i) the definition of the MIB property leads to inconsistencies and the nature of the imbalance measure is not clearly defined, ii) MIB property does not generalize Equal Percent Bias Reducing (EPBR) property, iii) MIB matching does not provide statistical information available with EPBR matching.
The Effect of Environmental Factors on Chorusing Activity of Soniferous Fishes in Aransas Bay, Texas
Creators: name: Saldeen, Jonathan
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Passive acoustic monitoring
PAM
soniferous
chorusing
marine ecology
ecology
acoustics
Black drum
spotted seatrout
silver perch
sciaenidae
soundscape
aquatic soundscape
Aransas Bay
Texas
Gulf Coast
spawning
reproduction
fish spawning

description: Several species of fish and other aquatic organisms use sound for communication, reproductive signaling and larval recruitment. Soniferous fishes can be monitored using passive acoustic monitoring (PAM). Some species of fish who use sound to reproduce take part in an activity researchers call “chorusing”, which is when a large number of individuals form spawning aggregations and emit noise for a sustained period of time. The species examined in this study are Pogonias cromis (Black Drum), Bairdiella chrysoura (Silver Perch), and Cynoscion nebulosus (Spotted Seatrout). By combining analysis of environmental data and PAM, I studied how changing environmental conditions can affect chorusing species of fish. This study used sound recordings of the aquatic environment from hydrophones mounted on the NERR SWMP station in Aransas Bay, Texas. Environmental data was also collected from the SWMP station in Aransas Bay, Texas. The environmental data collected included water temperature, conductivity, salinity, dissolved oxygen, depth, pH, turbidity, chlorophyll fluorometry, air temperature, barometric pressure, and lunar phase. The data was analyzed using generalized additive modeling (GAM) to determine the marginal effects of the environmental variables on chorusing activity. Water temperature was found to be the most significant predictor of chorusing activity for all three species, and was the only predictor all three species had in common. This finding is especially important in the face of anthropogenic climate change as rapidly changing temperatures could have a significant impact on spawning activity.
The K-band luminosity functions of super star clusters in luminous infrared galaxies, their slopes, and the effects of blending
Creators: name: Randriamanakoto, Zara
name: Vaisanen, Petri
name: Ryder, Stuart
name: Kankare, Erkki
name: Kotilainen, Jari
name: Mattila, Seppo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Super star clusters (SSCs) are typically found in interacting galaxies and trace an extreme form of star-formation. We present a K-band study of SSC candidates in a sample of local luminous infrared galaxies (LIRGs) using two adaptive optics instruments (VLT/NACO and Gemini/ALTAIR/NIRI). In addition to facilitating SSC detections in obscured environments, this work introduces SSC studies in hosts with higher star-formation rates (SFRs) than most previous studies. We find that the luminosity functions (LFs) of the clusters are reasonably well-fitted by a single power-law with the values of the index αranging between 1.5 to 2.4 with an average value of α~ 1.9. This value appears to be less steep than the average α~ 2.2 in normal spiral galaxies. Due to the host galaxy distances involved (median $D_L$ ~ 70 Mpc) blending effects have to be taken into account, and are investigated using Monte Carlo simulations of blending effects for LFs and a photometric SSC analysis of the well-studied Antennae system which is artificially redshifted to distances of our sample. While blending tends to flatten LFs our analyses show that Δαis less than ~ 0.1 in our sample. The simulations also show that in the luminosity range, $M_K < -13$, considered in this work the extracted SSC luminosities are generally dominated by a single dominant star cluster rather than several knots of SF. We present resolution- and distance-dependent SSC surface density confusion limits and show how blending rates and aperture sizes affect the LFs. The smallest possible apertures should be used in crowded regions.
description: 18 pages, 11 figures, accepted for publication in MNRAS
Effects of Stratification and Flows on P1/P2 Ratios and Anti-Node Shifts within Closed Loop Structures
Creators: name: Erdélyi, R.
name: Hague, A.
name: Nelson, C. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The solar atmosphere is a dynamic environment, constantly evolving to form a wide range of magnetically dominated structures (coronal loops, spicules, prominences, etc.) which cover a significant percentage of the surface at any one time. Oscillations and waves in many of these structures are now widely observed and have led to the new analytic technique of solar magneto-seismology, where inferences of the background conditions of the plasma can be deduced by studying magneto-hydrodynamic (MHD) waves. Here, we generalise a novel magneto-seismological method designed to infer the density distribution of a bounded plasma structure from the relationship of its fundamental and first harmonics. Observations of the solar atmosphere have emphatically shown that stratification, leading to complex density profiles within plasma structures, is common thereby rendering this work instantly accessible to solar physics. We show, in a dynamic waveguide, how the period ratio differs from the idealised harmonic ratios prevalent in homogeneous structures. These ratios show strong agreement with recent observational work. Next, anti-node shifts are also analysed. Using typical scaling parameters for bulk flows within atmospheric waveguides, e.g., coronal loops, it is found that significant anti-node shifts can be predicted, even to the order of 10 Mm. It would be highly encouraged to design specific observations to confirm the predicted anti-node shifts and apply the developed theory of solar magneto-seismology to gain more accurate waveguide diagnostics of the solar atmosphere.
description: 18 pages, 6 figures
Height of Shock Formation in the Solar Corona Inferred from Observations of Type II Radio Bursts and Coronal Mass Ejections
Creators: name: Gopalswamy, N.
name: Xie, H.
name: Mäkelä, P.
name: Yashiro, S.
name: Akiyama, S.
name: Srivastava, W. Uddin. A. K.
name: Joshi, N. C.
name: Chandra, R.
name: Manoharan, P. K.
name: Mahalakshmi, K.
name: Dwivedi, V. C.
name: Awasthi, R. Jain A. K.
name: Nitta, N. V.
name: Aschwanden, M. J.
name: Choudhary, D. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Employing coronagraphic and EUV observations close to the solar surface made by the Solar Terrestrial Relations Observatory (STEREO) mission, we determined the heliocentric distance of coronal mass ejections (CMEs) at the starting time of associated metric type II bursts. We used the wave diameter and leading edge methods and measured the CME heights for a set of 32 metric type II bursts from solar cycle 24. We minimized the projection effects by making the measurements from a view that is roughly orthogonal to the direction of the ejection. We also chose image frames close to the onset times of the type II bursts, so no extrapolation was necessary. We found that the CMEs were located in the heliocentric distance range from 1.20 to 1.93 solar radii (Rs), with mean and median values of 1.43 and 1.38 Rs, respectively. We conclusively find that the shock formation can occur at heights substantially below 1.5 Rs. In a few cases, the CME height at type II onset was close to 2 Rs. In these cases, the starting frequency of the type II bursts was very low, in the range 25 to 40 MHz, which confirms that the shock can also form at larger heights. The starting frequencies of metric type II bursts have a weak correlation with the measured CME/shock heights and are consistent with the rapid decline of density with height in the inner corona.
description: 14 pages, 4 figures, 2 tables, COSPAR 2012
5G PPP in Review
Creators: name: Warren, Dan
name: Fallgren, Mikael
name: Gavras, Anastasius
name: Trichias, Kostas
Publisher: name: Zenodo
Year: 2023

description: The formation of the 5th Generation Public Private Partnership (5G PPP) in 2014, as part of the European Commission's Horizon 2020 Framework Programme, set in motion what will be ten years of research into 5G Mobile Telecoms. The work of the projects, working groups and governance structure of 5G PPP has driven forward the European contribution to the development, standardisation and commercial launch of 5G technology.
The work to define 5G was necessarily a global initiative, but within that global effort, Europe has played a central and significant role. 5G PPP's 93 projects, which have fostered over 1200 standards contributions, more than 2500 publications and in excess of 50 white papers, represent a collaborative contribution from across academia, equipment vendors, network operators, SME's and most significantly, unprecedented engagement from other industries. This has enabled 5G PPP to develop new, innovative use cases that exploit the unique performance characteristics that characterise 5G as a new Generation, distinct from its predecessors.
5G PPP's structure, the progression of the focus of its projects from research to deployment to use case and proof-of-concept demonstration, its inclusivity of all aspects of the growing 5G ecosystem, and its fostering of a collaborative research community, have all ensured Europe's contribution has been felt domestically and world-wide.
This paper documents this approach, captures a summary of the delivered work and major achievements, assesses its effectiveness, and looks ahead to how the progress made by 5G PPP can be built upon by the Smart Networks and Services Joint Undertaking (SNS-JU), and more broadly through Horizon Europe.
A Study on the Universality and Linearity of the Leavitt Law in the LMC and SMC Galaxies
Creators: name: García-Varela, Alejandro
name: Sabogal, Beatriz
name: Ramírez-Tannus, María
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The universality and linearity of the Leavitt law are hypotheses commonly adopted in studies of galaxy distances using Cepheid variables as standard candles. In order to test these hypotheses, we obtain slopes of the Leavitt law using linear regressions of fundamental-mode Cepheids observed by the Optical Gravitational Lensing Experiment project in the Magellanic Clouds. We find that the slopes in $VI$-bands and in the Wesenheit index behave exponentially, indicating non-linearity. We also find that the slopes obtained using long-period Cepheids can be considered as universal in the $VI$-bands, but not in the Wesenheit index.
description: 8 pages, 3 figures. Accepted for publication in MNRAS
ЗОЛ-ГЕЛ ПОЛУЧАЕТСЯ НА ОСНОВЕ ПРОЦЕССОВ АММИАК ИСПОЛЬЗУЕТ НАНОМАТЕРИАЛЫ СОЗДАНИЕ СЕЛЕКТИВНЫХ ГАЗОВЫХ ДАТЧИКОВ
Creators: name: Абдурахманов, Эргаш
name: Абдурахманов, Илхом
name: Холмурзаев, Фарруx
name: Cувонқулов, Шохжахон
Publisher: name: Zenodo
Year: 2023

description: Сегодня использование селективных методов и чувствительных датчиков стремительно развивается в промышленности, при решении экологических проблем, особенно при решении проблемы мониторинга атмосферного воздуха, возникшей во всем мире в результате бурного развития химии, нефти и газа. химия. Полупроводниковые датчики (ППД) - чувствительные устройства, и их основные преимущества - простота использования, малые размеры, большой рабочий ресурс, высокая точность и скорость. Исследованы полупроводниковые газовые сенсоры на основе наноматериалов, полученных с использованием золь-гель процессов, золь-гель технологии изготовления аммиачных полупроводниковых сенсоров и исследования гидролитической поликонденсации ТЭОС при синтезе газочувствительных нанокомпозитных пленок.
The ESR intensity and the Dzyaloshinsky-Moriya interaction of the nanoscale molecular magnet V15
Creators: name: Machida, Manabu
name: Iitaka, Toshiaki
name: Miyashita, Seiji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The intensity of electron spin resonance (ESR) of the nanoscale molecular magnet V15 is studied. We calculate the temperature dependence of the intensity at temperatures from high to low. In particular, we find that the low-temperature ESR intensity is significantly affected by the Dzyaloshinsky-Moriya interaction.
description: accepted in Phys. Rev. B
Coarse-graining the calcium dynamics on a stochastic reaction-diffusion lattice model
Creators: name: Shen, Chuansheng
name: Chen, Hanshuang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a coarse grained (CG) approach for efficiently simulating calcium dynamics in the endoplasmic reticulum membrane based on a fine stochastic lattice gas model. By grouping neighboring microscopic sites together into CG cells and deriving CG reaction rates using local mean field approximation, we perform CG kinetic Monte Carlo (kMC) simulations and find the results of CG-kMC simulations are in excellent agreement with that of the microscopic ones. Strikingly, there is an appropriate range of coarse proportion $m$, corresponding to the minimal deviation of the phase transition point compared to the microscopic one. For fixed $m$, the critical point increases monotonously as the system size increases, especially, there exists scaling law between the deviations of the phase transition point and the system size. Moreover, the CG approach provides significantly faster Monte Carlo simulations which are easy to implement and are directly related to the microscopics, so that one can study the system size effects at the cost of reasonable computational time.
description: 9 pages, 5 figures
Continuos particles in the Canonical Ensemble as an abstract polymer gas
Creators: name: Morais, Thiago
name: Procacci, Aldo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82B05

description: We revisit the expansion recently proposed by Pulvirenti and Tsagkarogiannis for a system of $N$ continuous particles in the canonical ensemble. Under the sole assumption that the particles interact via a tempered and stable pair potential and are subjected to the usual free boundary conditions, we show the analyticity of the Helmholtz free energy at low densities and, using the Penrose tree graph identity, we establish a lower bound for the convergence radius which happens to be identical to the lower bound of the convergence radius of the virial series in the grand canonical ensemble established by Lebowitz and Penrose in 1964. We also show that the (Helmholtz) free energy can be written as a series in power of the density whose $k$ order coefficient coincides, modulo terms $o(N)/N$, with the $k$-order virial coefficient divided by $k+1$, according to its expression in terms of the $m$-order (with $m\le k+1$) simply connected cluster integrals first given by Mayer in 1942. We finally give an upper bound for the $k$-order virial coefficient which slightly improves, at high temperatures, the bound obtained by Lebowitz and Penrose.
Interior Structure of Water Planets: Implications for their dynamo source regions
Creators: name: Tian, Bob Yunsheng
name: Stanley, Sabine
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Recent discoveries of water-rich, sub-Neptunian to Neptunian-massed exoplanets with short-period orbits present a new parameter space for the study of exoplanetary dynamos. We explore the geometry of the dynamo source region within this parameter space using 1-D interior structure models. We model planets with 4 chemically distinct layers that consist of (1) an iron core, (2) a silicate layer, (3) an H2O layer, and (4) an H/He envelope. By varying the total planetary mass in the range of 1 - 19 Earth masses, the mass fraction of the H/He envelope between 0.1 - 5.1%, and the equilibrium temperature between 100 - 1000 K, a survey of the parameter space for potential dynamo source region geometries is conducted. We find that due to the nature of the phase diagram of water at pressure and temperature conditions of planetary interiors, two different dynamo source region geometries are obtainable. Specifically, we find that smaller planets and planets with thicker H/He envelopes are likely to be in the regime of a thick-shelled dynamo. Massive planets and planets with thin H/He envelopes are likely to be in the regime of a thin-shelled dynamo. Also, small variations of these parameters can produce large interior structure differences. This implies the potential to constrain these parameters based on observations of a planet's magnetic field signature.
description: 26 pages, 7 figures
Halo Models of Large Scale Structure and Reliability of Cosmological N-Body Simulations
Creators: name: Gaite, Jose
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: 85A40 (Primary) 37M05 28A80 (Secondary)

description: Halo models of the large scale structure of the Universe are critically examined, focusing on the definition of halos as smooth distributions of cold dark matter. This definition is essentially based on the results of cosmological N-body simulations. By a careful analysis of the standard assumptions of halo models and N-body simulations and by taking into account previous studies of self-similarity of the cosmic web structure, we conclude that N-body cosmological simulations are not fully reliable in the range of scales where halos appear. Therefore, to have a consistent definition of halos, it is necessary either to define them as entities of arbitrary size with a grainy rather than smooth structure or to define their size in terms of small-scale baryonic physics.
description: 13 pages, 11 figures
Study on the properties of the coupling constants of $J/ψ\rightarrow VP$ decays
Creators: name: Huang, Jinshu
name: Sun, Junfeng
name: Lu, Gongru
name: Li, Haibo
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Basing on the branching fractions of J/ψ\to VP from different experiments, we investigate on the properties of the coupling constants of J/ψ\to VP decays with a model-dependent approach. We find that the octet coupling constant, g_8, of strong interaction is about twice larger than that of the singlet coupling constant g_1; the electromagnetic breaking parameters g^i_E are larger than the mass breaking parameters g^i_M, moreover, the three parameters of electromagnetic effect are about equal, but the three parameters of mass effect are obviously different and their uncertainties are also large; and the phase angle between strong and electromagnetic interaction is in the range of 70^{\circ} \sim 80^{\circ}. It deepens our understanding of the coupling constant of J/ψ\to VP decays.
description: 6 pages, 4 tables, to be accepted by Chin. Phys. C
Observation, Characterization and Modeling of Memristor Current Spikes
Creators: name: Gale, Ella
name: Costello, Ben de Lacy
name: Adamatzky, Andrew
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences
subject: B.3.1
subject: 92Exx

description: Memristors have been compared to neurons (usually specifically the synapses) since 1976 but no experimental evidence has been offered for support for this position. Here we highlight that memristors naturally form fast-response, highly reproducible and repeatable current spikes which can be used in voltage-driven neuromorphic architecture. Ease of fitting current spikes with memristor theories both suggests that the spikes are part of the memristive effect and provides modeling capability for the design of neuromorphic circuits.
description: Long version of a conference (ICNAAM 2012) paper, 16 pages, 10 figures
Structure of Spin Polarized Strange Quark Star in the Presence of Magnetic Field at Finite Temperature
Creators: name: Bordbar, G. H.
name: Kayanikhoo, F.
name: Bahri, H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we have calculated the thermodynamic properties of spin polarized strange quark matter at finite temperature in the presence of a strong magnetic field using MIT bag model. We have also computed the equation of state of spin polarized strange quark matter in the presence of strong magnetic field and finally, using this equation of states we have investigated the structure of spin polarized strange quark star at different temperatures and magnetic fields.
description: 21 pages, 2 tables, 9 figures, Iranian J. Sci. Tech. A (2013) in press
title: Von der Feuerstelle zum Kachelofen. 3. wissenschaftliches Kolloquium Stralsund, 9. bis 11.12.1999
Creators: name: Hoffmann, Claudia
Publisher: name: University Library Heidelberg
Year: 2015

description: Tagungsbericht zu: Von der Feuerstelle zum Kachelofen. 3. wissenschaftliches Kolloquium Stralsund, 9. bis 11.12.1999
title: Karl Bernhard Kruse, Die Baugeschichte des Heiligen-Geist- Hospitals zu Lübeck, mit einem archäologischen Beitrag von Günter P. Fehring. Hrsg. v. Manfred Gläser für das Amt für Archäologische Denkmalpflege der Hansestadt Lübeck. –Bonnn 1997
Creators: name: Marstaller, Tilmann
Publisher: name: University Library Heidelberg
Year: 2015

description: Rezension zu: Karl Bernhard Kruse, Die Baugeschichte des Heiligen-Geist- Hospitals zu Lübeck, mit einem archäologischen Beitrag von Günter P. Fehring. Hrsg. v. Manfred Gläser für das Amt für Archäologische Denkmalpflege der Hansestadt Lübeck. –Bonn: Habelt, 1997 (Lübecker Schriften zu Archäologie
und Kulturgeschichte, Bd. 25) ISBN 3-7749-2822-3, 293 Seiten mit 73 Abb., 33 Taf. und 29 Beil.
Optimal control of singular Fourier multipliers by maximal operators
Creators: name: Bennett, Jonathan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 44B20, 42B25

description: We control a broad class of singular (or "rough") Fourier multipliers by geometrically-defined maximal operators via general weighted $L^2(\mathbb{R})$ norm inequalities. The multipliers involved are related to those of Coifman--Rubio de Francia--Semmes, satisfying certain weak Marcinkiewicz-type conditions that permit highly oscillatory factors of the form $e^{i|ξ|^α}$ for both $α$ positive and negative. The maximal functions that arise are of some independent interest, involving fractional averages associated with tangential approach regions (related to those of Nagel and Stein), and more novel "improper fractional averages" associated with "escape" regions. Some applications are given to the theory of $L^p-L^q$ multipliers, oscillatory integrals and dispersive PDE, along with natural extensions to higher dimensions.
description: 22 pages
Satellite Motion in a Manev Potential with Drag
Creators: name: Kirk, Samantha
name: Haranas, Ioannis
name: Gkigkitzis, Ioannis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this paper, we consider a satellite orbiting in a Manev gravitational potential under the influence of an atmospheric drag force that varies with the square of velocity. Using an exponential atmosphere that varies with the orbital altitude of the satellite, we examine a circular orbit scenario. In particular, we derive expressions for the change in satellite radial distance as a function of the drag force parameters and obtain numerical results. The Manev potential is an alternative to the Newtonian potential that has a wide variety of applications, in astronomy, astrophysics, space dynamics, classical physics, mechanics, and even atomic physics.
description: Accepted for publication in Astrophysics and Space Science
title: Introducing the Default Effect: Reducing the Gap Between Theoretical Prediction and Actual Energy Consumed by Dwellings Through Characterising Data More Representative of National Dwellings Stocks
Creators: name: Ahern, Ciara
Publisher: name: Technological University Dublin
Year: 2019

description: Dwelling stock models that include the renovation status of the dwelling stock enable energy analyses of the stock. Using Ireland’s predominant single‐family housing typology as a case study dwelling, the overarching objective of this research is to define a transparent generalisable methodology to create a stock model from a large empirical Energy Performance Certification (EPC) database, employing reference dwellings (RDs) defined using a ‘bottom‐up’ approach. RDs are to be reported in compliance with Regulation No. (EU) 244/2012. The generalisable methodology defined allows for the development of stock models from EPC datasets. Where obtaining the required data would be prohibitively costly, nationally applicable default‐values are used in EPC assessments. To ensure that dwellings are not assigned wrongly‐higher energy ratings, worst‐case base‐thermal‐default U‐values are used which, in the absence of empirical data, are determined by building type and prevailing building codes at time of construction date. A structural ‘default effect’ error in the EPC data was identified. It was found that 58 % of walls and 67 % of roofs had significant retrofits of insulation, leading to; (i) less association between a dwelling’s age and its energy efficiency, and (ii) currently used default U‐values being outmoded. Outmoded default U‐values; (i) decrease the credibility of both the EPC and its associated advisory report so inhibiting investment in energy efficiency, and (ii) lead to overestimation of potential residential energy savings, estimated at 22 % in post‐thermal regulation dwellings and 70 % in pre‐thermal regulation dwellings. To address this, generalisable methodologies have been developed to derive from an EPC dataset;

i) statistically relevant contemporaneous default U‐values, ii) a dwelling stock model derived from largely‐default‐free synthetically averaged RDs, iii) the renovation status of a dwelling stock, iv) a stochastically based energy‐improvement payback calculation methodology, to be used where pessimistic default U‐values are necessarily employed. Use of the statistically‐derived empirical data created will increase the validity and hence credibility of residential stock energy consumption models, the EPC, and its associated advisory report; enabling more valid quantification of the; a) energy saving potential within Ireland’s predominant housing typology, b) effect of default U‐value use on the prebound effect, and c) overall national building energy consumption.
Computational study of subcritical response in flow past a circular cylinder
Creators: name: Cantwell, Christopher D.
name: Barkley, Dwight
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Flow past a circular cylinder is investigated in the subcritical regime, below the onset of Benard-von Karman vortex shedding at Re_c ~ 47. The transient response of infinitesimal perturbations is computed. The domain requirements for obtaining converged results is discussed at length. It is shown that energy amplification occurs as low as Re=2.2. Throughout much of the subcritical regime the maximum energy amplification increases approximately exponentially in the square of Re reaching 6800 at Re_c$. The spatiotemporal structure of the optimal transient dynamics is shown to be transitory Benard-von Karman vortex streets. At Re ~ 42 the long-time structure switches from exponentially increasing downstream to exponentially decaying downstream. Three-dimensional computations show that two-dimensional structures dominate the energy growth except at short times.
description: 14 pages, 16 figures
LONG TIME DYNAMICS OF THE KLEIN-GORDON EQUATION IN THE NON-RELATIVISTIC LIMIT
Creators: name: PASQUALI, STEFANO
Publisher: name: Universit� degli Studi di Milano
Year: 2017

description: In this thesis I study the non-relativistic limit ($c \to \infty$) of the nonlinear Klein-Gordon (NLKG) equation on a manifold $M$, namely \[ \frac{1}{c^2} u_{tt} - \Delta u + c^2 u + \lambda |u|^{2(l-1)}u = 0, \; \; t \in \R, x \in M \] where $\lambda = \pm 1$, $l \geq 2$. The aim of the present work is to discuss the convergence of solutions of the NLKG to solutions of a suitable nonlinear Schr\"odinger (NLS) equation, and to study whether such convergence may hold for large (namely, of size$O(c^r)$ with $r \geq 1$) timescales. In particular I obtain the following results: (1) when $M$ is a general manifold, I show that the solution of NLS describes well the solution of the original equation up to times of order $\cO(1)$; (2) when $M=\mathbb{R}^d$,$d \geq 3$, I consider higher order approximations of NLKG and prove that small radiation solutions of the approximating equation describe well solutions of NLKG up to times of order $O(c^{2r})$ for any $r \geq 1$; (3) when $M=[0,\pi] \subset \mathbb{R}$ I consider the NLKG equation with aconvolution potential and prove existence for long times of solutionsin $H^s$ uniformly in $c$, which however has to belong to a set of large measure. I also get some new dispersive estimates for a Klein-Gordon type equation with a potential.
On Quasihyperbolic Geodesics in Banach Spaces
Creators: name: Rasila, Antti
name: Talponen, Jarno
Publisher: name: arXiv
Year: 2013
Subjects: subject: Complex Variables (math.CV)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 30C65

description: We study properties of quasihyperbolic geodesics on Banach spaces. For example, we show that in a strictly convex Banach space with the Radon-Nikodym property, the quasihyperbolic geodesics are unique. We also give an example of a convex domain $Ω$ in a Banach space such that there is no geodesic between any given pair of points $x, y \in Ω\,.$ In addition, we prove that if $\mathrm{X}$ is a uniformly convex Banach space and its modulus of convexity is of a power type, then every geodesic of the quasihyperbolic metric, defined on a proper subdomain of $\mathrm{X}$, is smooth.
description: 14 pages, 4 figures
Вивчення пам’яток давньоруського часу на території УРСР
Creators: name: Кучера, Михайло
Publisher: name: figshare
Year: 2019
Subjects: Archaeology

description: Кучера, М. П. 1978. Вивчення пам’яток давньоруського часу на території УРСР. Археологія, 26, с. 77–83.
Generic Correlation Increases Noncoherent MIMO Capacity
Creators: name: Koliander, Günther
name: Riegler, Erwin
name: Durisi, Giuseppe
name: Hlawatsch, Franz
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94A15

description: We study the high-SNR capacity of MIMO Rayleigh block-fading channels in the noncoherent setting where neither transmitter nor receiver has a priori channel state information. We show that when the number of receive antennas is sufficiently large and the temporal correlation within each block is "generic" (in the sense used in the interference-alignment literature), the capacity pre-log is given by T(1-1/N) for T
description: To be presented at IEEE Int. Symp. Inf. Theory (ISIT) 2013, Istanbul, Turkey
Comparison of solar surface flows inferred from time--distance helioseismology and coherent structure tracking using HMI/SDO observations
Creators: name: Svanda, M.
name: Roudier, Th.
name: Rieutord, M.
name: Burston, R.
name: Gizon, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We compare measurements of horizontal flows on the surface of the Sun using helioseismic time--distance inversions and coherent structure tracking of solar granules. Tracking provides 2D horizontal flows on the solar surface, whereas the time--distance inversions estimate the full 3-D velocity flows in the shallow near-surface layers. Both techniques use HMI observations as an input. We find good correlations between the various measurements resulting from the two techniques. Further, we find a good agreement between these measurements and the time-averaged Doppler line-of-sight velocity, and also perform sanity checks on the vertical flow that resulted from the 3-D time--distance inversion.
description: 22 pages of the manuscript, 5 figures, 3 tables, accepted for publication in the Astrophysical Journal
Давньоруські городища в західній частині Переяславщини
Creators: name: Кучера, Михайло
Publisher: name: figshare
Year: 2019
Subjects: Archaeology

description: Кучера, М. П. 1978. Давньоруські городища в західній частині Переяславщини. Археологія, 25, с. 21–31.