cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Recombination Ghosts in Littrow Configuration: Implications for Spectrographs Using Volume Phase Holographic Gratings
Creators: name: Burgh, Eric B.
name: Bershady, Matthew A.
name: Westfall, Kyle B.
name: Nordsieck, Kenneth H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of optical ghosts generated when using Volume Phase Holographic (VPH) gratings in spectrographs employing the Littrow configuration. The ghost is caused by light reflected off the detector surface, recollimated by the camera, recombined by, and reflected from, the grating and reimaged by the camera onto the detector. This recombination can occur in two different ways. We observe this ghost in two spectrographs being developed by the University of Wisconsin - Madison: the Robert Stobie Spectrograph for the Southern African Large Telescope and the Bench Spectrograph for the WIYN 3.5m telescope. The typical ratio of the brightness of the ghost relative to the integrated flux of the spectrum is of order 10^-4, implying a recombination efficiency of the VPH gratings of order 10^-3 or higher, consistent with the output of rigorous coupled wave analysis. Any spectrograph employing VPH gratings, including grisms, in Littrow configuration will suffer from this ghost, though the general effect is not intrinsic to VPH gratings themselves and has been observed in systems with conventional gratings in non-Littrow configurations. We explain the geometric configurations that can result in the ghost as well as a more general prescription for predicting its position and brightness on the detector. We make recommendations for mitigating the ghost effects for spectrographs and gratings currently built. We further suggest design modifications for future VPH gratings to eliminate the problem entirely, including tilted fringes and/or prismatic substrates. We discuss the resultant implications on the spectrograph performance metrics.
description: 13 pages, 8 figures, emulateapj style, accepted for publication in PASP
La lirica trobadorica nella Toscana del Duecento. Canali e forme della diffusione
Creators: name: Resconi, Stefano
Publisher: name: Università degli Studi di Milano
Year: 2014
Subjects: tradizione manoscritta; manuscript tradition; poesia provenzale; Provençal poetry; Toscana; Tuscany; poesia italiana delle Origini; Italian poetry (XIII century)

description: Coniugando i dati provenienti dallo studio della tradizione manoscritta a quelli desumibili dall’analisi di testi particolarmente significativi, questo articolo traccia un profilo critico delle modalità con le quali la tradizione manoscritta trobadorica si è diffusa in area toscana nel corso del Duecento. Si individua cosí un canale di accesso privilegiato alla regione attivo almeno dagli anni Sessanta del XIII secolo in corrispondenza dell’asse Monferrato-Genova-Malaspina. In relazione a questo itinerario fondamentale si definiscono inoltre le tracce di tradizioni minoritarie e si individua un ancora piú antico sostrato di produzione trobadorica legata a quest’area.

This paper shows how the Troubadour manuscript tradition has spread to Tuscan area during the Thirteenth century; useful data are inferred from the analysis of both extant manuscripts and particularly significant texts. The study makes it possible to identify a path (Monferrato-Genoa-Malaspina) of privileged access of the texts to Tuscany since the Sixties of the Thirteenth century at least, and recognizes traces of minor traditions and older Provençal production connected to this region.
description: Carte romanze, Vol 2, No 2 (2014)
The cyclotron spectrum of anisotropic ultrarelativistic electrons: interpretation of X-ray pulsar spectra
Creators: name: Baushev, A. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The spectrum of cyclotron radiation produced by electrons with a strongly anisotropic velocity distribution is calculated taking into account higher harmonics. The motion of the electrons is assumed to be ultrarelativistic along the magnetic field and nonrelativistic across the field. One characteristic feature of the resulting spectrum is that harmonics of various orders are not equally spaced. The physical properties and observed spectra of four X-ray pulsars displaying higher cyclotron harmonics are analyzed. The cyclotron features in the spectra of all four pulsars can be interpreted only as emission lines. Moreover, the observed harmonics are not equidistant, and display certain other properties characteristic of emission by strongly anisotropic ultrarelativistic electrons. In addition, there are indirect theoretical arguments that the electrons giving rise to cyclotron features in the spectra of X-ray pulsars are ultrarelativistic and characterized by strongly anisotropic distributions. As a result, estimates of the magnetic fields of X-ray pulsars (which are usually derived from the energies of cyclotron lines) and certain other physical parameters require substantial revision.
description: 15 pages, 4 figures, published in astronomy reports
Tuning the intermediate reaction barriers by CuPd catalyst to improve the selectivity of electroreduction CO2 to C2 products
Creators: name: Zhu, Li
name: Lin, Yiyang
name: Liu, Kang
name: Cortés, Emiliano
name: Li, Hongmei
name: Hu, Junhua
name: Yamaguchi, Akira
name: Lu, Ying-Rui
name: Chan, Ting-Shan
name: Liu, Xiaoliang
name: Miyauchi, Masahiro
name: Fu, Junwei
name: Liu, Min
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Electrochemical CO2 reduction is a promising strategy for utilization of CO2 and intermittent excess electricity. Cu is the only single-metal catalyst that can electrochemically convert CO2 to multi-carbon products. However, Cu has an undesirable selectivity and activity for C2 products, due to its insufficient amount of CO* for C-C coupling. Considering the strong CO2 adsorption and ultra-fast reaction kinetics of CO* formation on Pd, an intimate CuPd(100) interface was designed to lower the intermediate reaction barriers and then improve the efficiency of C2 products. Density functional theory (DFT) calculations showed that the CuPd(100) interface has enhanced CO2 adsorption and decreased CO2* hydrogenation energy barrier, which are beneficial for C-C coupling. The potential-determining step (PDS) barrier of CO2 to C2 products on CuPd(100) interface is 0.61 eV, which is lower than that on Cu(100) (0.72 eV). Motivated by the DFT calculation, the CuPd(100) interface catalyst was prepared by a facile chemical solution method and demonstrated by transmission electron microscope (TEM). The CO2 temperature programmed desorption (CO2-TPD) and gas sensor experiments proved the enhancements of CO2 adsorption and CO2* hydrogenation abilities on CuPd(100) interface catalyst. As a result, the obtained CuPd(100) interface catalyst exhibits a C2 Faradaic efficiency of 50.3 (+/-) 1.2% at -1.4 VRHE in 0.1 M KHCO3, which is 2.1 times higher than 23.6(+/-) 1.5% of Cu catalyst. This work provides a rational design of Cu-based electrocatalyst for multi-carbon products by fine-tuning the intermediate reaction barriers.
Multiwavelength observations of a giant flare on CN Leonis I. The chromosphere as seen in the optical spectra
Creators: name: Fuhrmeister, B.
name: Liefke, C.
name: Schmitt, J. H. M. M.
name: Reiners, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Flares on dM stars contain plasmas at very different temperatures and thus affect a wide wavelength range in the electromagnetic spectrum. While the coronal properties of flares are studied best in X-rays, the chromosphere of the star is observed best in the optical and ultraviolet ranges. Therefore, multiwavelength observations are essential to study flare properties throughout the atmosphere of a star. We analysed simultaneous observations with UVES/VLT and XMM-Newton of the active M5.5 dwarf CN Leo (Gl 406) exhibiting a major flare. The optical data cover the wavelength range from 3000 to 10000 Angstrom. From our optical data, we find an enormous wealth of chromospheric emission lines occurring throughout the spectrum. We identify a total of 1143 emission lines, out of which 154 are located in the red arm, increasing the number of observed emission lines in this red wavelength range by about a factor of 10. Here we present an emission line list and a spectral atlas. We also find line asymmetries for H I, He I, and Ca II lines. For the last, this is the first observation of asymmetries due to a stellar flare. During the flare onset, there is additional flux found in the blue wing, while in the decay phase, additional flux is found in the red wing. We interpret both features as caused by mass motions. In addition to the lines, the flare manifests itself in the enhancement of the continuum throughout the whole spectrum, inverting the normal slope for the net flare spectrum.
description: 15 pages, accepted by A&A
Lifting D-Instanton Zero Modes by Recombination and Background Fluxes
Creators: name: Blumenhagen, Ralph
name: Cvetic, Mirjam
name: Richter, Robert
name: Weigand, Timo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the conditions under which D-brane instantons in Type II orientifold compactifications generate a non-perturbative superpotential. If the instanton is non-invariant under the orientifold action, it carries four instead of the two Goldstone fermions required for superpotential contributions. Unless these are lifted, the instanton can at best generate higher fermionic F-terms of Beasley-Witten type. We analyse two strategies to lift the additional zero modes. First we discuss the process of instantonic brane recombination in Type IIA orientifolds. We show that in some cases charge invariance of the measure enforces the presence of further zero modes which, unlike the Goldstinos, cannot be absorbed. In other cases, the instanton exhibits reparameterisation zero modes after recombination and a superpotential is generated if these are lifted by suitable closed or open string couplings. In the second part of the paper we address lifting the extra Goldstinos of D3-brane instantons by supersymmetric three-form background fluxes in Type IIB orientifolds. This requires non-trivial gauge flux on the instanton. Only if the part of the fermionic action linear in the gauge flux survives the orientifold projection can the extra Goldstinos be lifted.
description: 38 pages, 3 figures, 5 tables; v2: Appendix B slightly expanded, minor rewording
The Fourier formalism for relativistic axion-photon conversion, with astrophysical applications
Creators: name: Marsh, M. C. David
name: Matthews, James H.
name: Reynolds, Christopher
name: Carenza, Pierluca
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the weak mixing of photons and relativistic axion-like particles (axions) in plasmas with background magnetic fields, ${\bf B}$. We show that, to leading order in the axion-photon coupling, the conversion probability, $P_{γ\to a}$, is given by the one-dimensional power spectrum of the magnetic field components perpendicular to the particle trajectory. Equivalently, we express $P_{γ\to a}$ as the Fourier transform of the magnetic field autocorrelation function, and establish a dictionary between properties of the real-space magnetic field and the energy-dependent conversion probability. For axions more massive than the plasma frequency, ($m_a>ω_{\rm pl}$), we use this formalism to analytically solve the problem of perturbative axion-photon mixing in a general magnetic field. In the general case where $ω_{\rm pl}/m_a$ varies arbitrarily along the trajectory, we show that a naive application of the standard formalism for 'resonant' conversion can give highly inaccurate results, and that a careful calculation generically gives non-resonant contributions at least as large as the resonant contribution. Furthermore, we demonstrate how techniques based on the Fast Fourier Transform provide a new, highly efficient numerical method for calculating axion-photon mixing. We briefly discuss magnetic field modelling in galaxy clusters in the light of our results and argue, in particular, that a recently proposed 'regular' model used for studying axion-photon mixing (specifically applied to the Perseus cluster) is inconsistent with observations. Our formalism suggest new methods to search for imprints of axions, and will be important for spectrographs with percent level sensitivity, which includes existing X-ray observations by Chandra as well as the upcoming Athena mission.
description: 39 pages, 14 figures. v3: matches published version
Noise filtering with edge preservation in digital images
Creators: name: Rey, Claudio Gustavo
Publisher: name: University of British Columbia
Year: 2010

description: The widespread use of the absolute gradient and the sample variance in present day local noise filters in digital image processing is pointed out. It is shown that the sample variance and the absolute gradient can be viewed as measures of the modelling error for a simple zeroth order local image model. This is shown to lead to a general formulation of local noise filtering applicable to the great majority of current local noise niters for digital images. This formulations describes local noise filtering as a two step process. In the first step a robust estimation of every pixel z[sub o] is obtained. In the second step a better estimate of z[sub o] is obtained by performing a weighted sum within a neighborhood of z[sub o]. The weights in the second step are related to some measure of modelling error of the above zeroth order model; namely, the absolute gradient or the sample variance. Of the above two measures of modelling error, the sample variance is shown to be the least sensitive to noise. Furthermore, the sample variance is also more sensitive to faint image edges. Therefore,the sample variance is the most desirable of the above two measures of modelling error. Unfortunately, its use until now has been hampered by its poor edge localization. To solve this problem a new measure of modelling error is introduced which achieves far superior edge localization than the sample variance (though still lower than the absolute gradient) but maintains the low noise sensitivity. A filter is designed based on this new measure of modelling error (of the zeroth order model described above) which is shown to perform better, in a least squares sense, than all other local noise filters for non-impulsive additive and multiplicative noise. A practical implementation of this original filter is also presented.
Deep Neural Networks for Detecting Statistical Model Misspecifications. The Case of Measurement Invariance
Creators: name: Pokropek, Artur
name: Pokropek, Ernest
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: While in recent years a number of new statistical approaches have been proposed to model group differences with a different assumption on the nature of the measurement invariance of the instruments, the tools for detecting local misspecifications of these models have not been fully developed yet. In this study, we present a novel approach using a Deep Neural Network (DNN). We compared the proposed model with the most popular traditional methods: Modification Indices (MI) and Expected Parameter Change (EPC) indicators from the Confirmatory Factor Analysis (CFA) modeling, logistic DIF detection, and sequential procedure introduced with the CFA alignment approach. Simulation studies show that the proposed method outperformed traditional methods in almost all scenarios, or it was at least as accurate as the best one. We also provide an empirical example utilizing European Social Survey data including items known to be miss-translated, which are correctly identified with presented DNN approach.
description: 46 pages, 7 figures, 4 tables
Asymptotic behavior of weighted quadratic and cubic variations of fractional Brownian motion
Creators: name: Nourdin, Ivan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60G15, 60H07 (Primary)

description: The present article is devoted to a fine study of the convergence of renormalized weighted quadratic and cubic variations of a fractional Brownian motion $B$ with Hurst index $H$. In the quadratic (resp. cubic) case, when $H<1/4$ (resp. $H<1/6$), we show by means of Malliavin calculus that the convergence holds in $L^2$ toward an explicit limit which only depends on $B$. This result is somewhat surprising when compared with the celebrated Breuer and Major theorem.
description: Published in at http://dx.doi.org/10.1214/07-AOP385 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Luminescence of non-bridging oxygen hole centers as a marker of particle irradiation of α-quartz
Creators: name: Skuja, Linards
name: Ollier, Nadège
name: Kajihara, Koichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The origin of the "red" emission bands in the 600 nm-700 nm region, observed in quartz crystals used for luminescence dating and environmental dosimetry, is still controversial. Their reported spectral and lifetime characteristics are often similar to those of oxygen dangling bonds ("non-bridging oxygen hole centers, NBOHCs") in glassy silicon dioxide. The presence of these "surface radical type" centers in quartz crystal requires sites with highly disordered local structure forming nano-voids characteristic to the structure of glassy SiO2. Such sites are introduced in the tracks of nuclear particles (α-irradiation, neutrons, ions). In case of electrons they are created only at large doses (>5 GGy), approaching amorphization threshold. This study reports a comparison of NBOHC photoluminescence in synthetic quartz and silica glass irradiated by neutrons or 2.5 MeV electrons, and suggests that the red NBOHC photoluminescence band in quartz may serve as a selective marker of an exposure to particle irradiation. It can be distinguished from other red-region luminescence bands by lifetimes in 5-25 μs range, characteristic vibrational structures in the low-temperature spectra and presence of resonance excitation band at ~620 nm.
description: 10 pages, 4 figures, presented in Solid State Dosimetry conference SSD19 Hiroshima 2019
PEACE IS IN OUR HANDS
Creators: name: Dr. Muhammad Shahzad Ashfaq
Publisher: name: Zenodo
Year: 2023

description: The author believes that children have the power to create a more peaceful world, and through this book, he aims to inspire children to become ambassadors of love, peace, and harmony. With interactive colouring pages young readers will embark on a journey of self-discovery and discover the joy of spreading positivities. Through engaging activity, children will not only learn about the importance of peace but also discover the beauty of diversity and the power of unity. Whether you're a parent, teacher, or a young reader, join Dr. Shahzad on this enchanting adventure to empower children to make a difference in the world. Get ready to embark on a journey of imagination, compassion, and the realization that peace is truly in our hands.
Local Volume Late-Type Galaxies with an Extreme Ratio of $Hα$-to-$FUV$ Star-Formation Rates
Creators: name: Karachentsev, I. D.
name: Kaisina, E. I.
name: Kaisin, S. S .
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using a currently most representative sample of 477 late-type galaxies within 11 Mpc of the Milky Way with measured star-formation rates ($SFR$s) from the far ultraviolet ($FUV$) and H$α$ emission line fluxes, we select galaxies with the extreme ratios: $SFR(Hα)/SFR(FUV) > 2$ and $SFR(Hα)/SFR(FUV) < 1/20$. Each subsample amounts to $\sim5$\% of the total number and consists of dwarf galaxies with the stellar masses $M^*/M_{\odot} = (5.5 - 9.5)$~dex. In spite of a huge difference in their $SFR(Hα)$ activity on a scale of $\sim10$~ Myr, the temporarily "excited" and temporarily "quiescent" galaxies follow one and the same relation between $SFR(FUV)$ and $M^*$ on a scale of $\sim100$~Myr. Their average specific star-formation rate $\log[SFR(FUV)/M^*] = -10.1\pm0.1$ (yr$^{-1}$) coinsides with the Hubble parameter $\log(H_0)= -10.14$ (yr$^{-1}$). On a scale of $t \sim10$~Myr, variations of $SFR$ have a moderate flash amplitude of less than 1 order above the main-sequence and a fading amplitude to 2 orders below the average level. In general, both temporarily excited and temporarily quiescent galaxies have almost similar gas fractions as normal main-sequence galaxies, being able to maintain the current rate of star-formation on another Hubble time scale. Ranging the galaxies according to the density contrast produced by the nearest massive neighbor exhibits only a low average excess of $SFR$ caused by tidal interactions.
description: Will be published in MNRAS, 11 pages, 6 figures, 3 tables
การศึกษาการบริหารงานวิชาการของโรงเรียนขนาดเล็กสำนักงานเขตพื้นที่การศึกษามหาสารคาม เขต 3
Creators: name: วันชัย พงสุพันธ์
name: ศิริ ถีอาสนา
name: สมบัติ ฤทธิเดช
Publisher: name: มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2010
Subjects: การบริหารงานวิชาการ, โรงเรียนขนาดเล็ก, เขตพื้นที่การศึกษามหาสารคาม เขต 3

description: 2, 4, วารสารมหาวิทยาลัยราชภัฏมหาสารคามมนุษยศาสตร์และสังคมศาสตร์
A concise review on THGEM detectors
Creators: name: Breskin, A.
name: Alon, R.
name: Cortesi, M.
name: Chechik, R.
name: Miyamoto, J.
name: Dangendorf, V.
name: Maia, J.
name: Santos, J. M. F. Dos
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We briefly review the concept and properties of the Thick GEM (THGEM); it is a robust, high-gain gaseous electron multiplier, manufactured economically by standard printed-circuit drilling and etching technology. Its operation and structure resemble that of GEMs but with 5 to 20-fold expanded dimensions. The millimeter-scale hole-size results in good electron transport and in large avalanche-multiplication factors, e.g. reaching 10^7 in double-THGEM cascaded single-photoelectron detectors. The multiplier's material, parameters and shape can be application-tailored; it can operate practically in any counting gas, including noble gases, over a pressure range spanning from 1 mbar to several bars; its operation at cryogenic (LAr) conditions was recently demonstrated. The high gain, sub-millimeter spatial resolution, high counting-rate capability, good timing properties and the possibility of industrial production capability of large-area robust detectors, pave ways towards a broad spectrum of potential applications; some are discussed here in brief.
description: 8 pages, 11 figures; Invited Review at INSTR08, Novosibirsk, Feb 28-March 5 2008
Structural Ramsey theory of metric spaces and topological dynamics of isometry groups
Creators: name: Van Thé, L. Nguyen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Logic (math.LO)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 03E02, 05C55, 05D10, 22A05, 22F05, 51F99

description: In 2003, Kechris, Pestov and Todorcevic showed that the structure of certain separable metric spaces - called ultrahomogeneous - is closely related to the combinatorial behavior of the class of their finite metric spaces. The purpose of the present paper is to explore the different aspects of this connection.
description: 156 pages, 13 figures. Previous Chap1) Prop9, Prop13 ; Chap3) Thm59, Thm67 fixed. Typo at the end of Chap2) Lemma1 fixed. Proof of Chap2) Lemma8 fixed. Chap3) Intro (indivisibility of uncountable separable metric space) fixed. Chap3) Thm68 removed. Chap3) Thm69 replaced by iv) implies i). Mistake found and fixed in the corresponding proof (previously Prop24)
Scattering mechanisms and Boltzmann transport in graphene
Creators: name: Adam, Shaffique
name: Hwang, E. H.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Different scattering mechanisms in graphene are explored and conductivity is calculated within the Boltzmann transport theory. We provide results for short-range scattering using the Random Phase Approximation for electron screening, as well as analytical expressions for the dependence of conductivity on the dielectric constant of the substrate. We further examine the effect of ripples on the transport using a surface roughness model developed for semiconductor heterostructures. We find that close to the Dirac point, σ\sim n^β, where β=1,0,-2 for Coulomb, short-range and surface roughness respectively; implying that Coulomb scattering dominates over both short-range and surface roughness scattering at low density.
description: To be published in Physica E as EP2DS-17 conference proceedings
Promoting Open Science through new The Bridge of Knowledge platform at Gdansk University of Technology
Creators: name: Szuflita-Żurawska, Magdalena
name: Wałek, Anna
Publisher: name: Zenodo
Year: 2018
Subjects: scholarly communication
Open Science
instutional repository

description: The process of scholarly communications and adopting Open Science principles is changing dramatically. It has matured significantly by using a proper infrastructure for sharing and dissemination of scientific knowledge. Nowadays, creating awareness among academic community and offer solutions to specific issues are the most important goals for the Library. We would like to present challenges and strategies to promote scientific output of Gdansk University of Technology (GUT), Poland through new established platform “MOST Wiedzy”. MOST Wiedzy in Polish means The Bridge of Knowledge and stands as acronym of Multidisciplinary Open System Transferring Knowledge. It should be stressed that this project is co-financed by the European Regional Development Fund within the Optional Programme Digital Poland for the years 2014 – 2020. MOST Wiedzy project complements other features under the umbrella of Open Science platform. The platform is a solution that supports not only scholarly communication but try to facilitate the cooperation between university and business industry. The main goals include for example: integrating data from different databases and providers as well as establishing open repository. MOST Wiedzy is a modern platform that allows to present scientific profiles and research conducted at GUT. Through its website, users can search for publications, teaching activities or research equipment. MOST Wiedzy offers repository support from team of experienced librarians that not only upload the open access manuscripts but in addition, steer publications through different phases such as editing or promoting. In our poster, we would like to demonstrate how MOST Wiedzy project helps researcher to share their scientific results, gain recognition and promote their achievements.
description: The 'Multidisciplinary Open Knowledge Transfer System - Bridge of Knowledge' project is co-financed by the European Regional Development Fund under the Digital Poland Operational Program for 2014-2020
The spin exchange interaction effect on Tc equation of anisotropic impure superconductors
Creators: name: Udomsamuthirun, P.
name: Supadanaison, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the influence of spin exchange interaction of impurity scattering on critical temperature of anisotropic impure superconductors. The model of random nonmagnetic and magnetic impurity are revised to cover the effect of spin exchange interaction . The sign of magnitude of the second-order Born scattering have been changed after consideration the spin exchange interaction effect that also effect to form of Tc equation. We can get the general Tc equation that can be described anisotropic impure superconductors well and cover all model done before.
description: 8 pages. Physica C(accepted)
Fulgoromorpha Evans 1946
Creators: name: Santos, Júlio César Do Carmo Vaz
name: Iuri, Hernán Augusto
name: Hoch, Hannelore
name: Ferreira, Rodrigo Lopes
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Malvales

description: Troglobitic Fulgoromorpha in the Americas
Worldwide, there are 70 described species of cave-dwelling Fulgoromorpha (Le Cesne et al. 2024), and out of the 20 species described for the Americas, 15 belong to the family Cixiidae Spinola, 1839 (Table 1). This accounts for approximately one third of all cave-dwelling cixiids worldwide, which totals to 45 species (Le Cesne et al. 2024). While N. sensitivus was the first troglobitic Fulgoromorpha species described for South America, it was the seventh cave planthopper species documented on the American continent (Table 1). It was also the fourth of the eight present genus with troglobitic species described for the American continent (Fig. 10). Fennah (1973 – 1980) made the initial contributions by describing species from Mexico and Hawaii. Subsequently, Hoch & Izquierdo (1996), Hoch (1988), Hoch & Howarth (1999) and Hoch et al. (2024) described several species from Galapagos, Hawaii, and Mexico, respectively. In the past decade, significant progress has been made in inventorying the troglobitic planthopper fauna of South America, with the description of five species in Brazil, distributed among the families Cixiidae (3) and Kinnaridae (2) (Table 1).
description: Published as part of Santos, Júlio César Do Carmo Vaz, Iuri, Hernán Augusto, Hoch, Hannelore & Ferreira, Rodrigo Lopes, 2024, The enigmatic Notolathrus sensitivus Remes Lenicov, 1992 (Hemiptera: Fulgoromorpha: Cixiidae): supplementary description and conservation status, pp. 355-374 in Zootaxa 5474 (4) on page 368, DOI: 10.11646/zootaxa.5474.4.2, http://zenodo.org/record/12681125
Integrable lattices and their sublattices II. From the B-quadrilateral lattice to the self-adjoint schemes on the triangular and the honeycomb lattices
Creators: name: Doliwa, A.
name: Nieszporski, M.
name: Santini, P. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: An integrable self-adjoint 7-point scheme on the triangular lattice and an integrable self-adjoint scheme on the honeycomb lattice are studied using the sublattice approach. The star-triangle relation between these systems is introduced, and the Darboux transformations for both linear problems from the Moutard transformation of the B-(Moutard) quadrilateral lattice are obtained. A geometric interpretation of the Laplace transformations of the self-adjoint 7-point scheme is given and the corresponding novel integrable discrete 3D system is constructed.
description: 15 pages, 6 figures; references added, some typos corrected
Dimensions of Anger Reactions (DAR-5): a useful screening tool for anger in the general population
Creators: name: Goulart, Alessandra C.
name: Bismarchi, Danielle
name: Rienzo, Marcos
name: Syllos, Danielli Haddad
name: Wang, Yuan-Pang
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Dimensions of Anger Reactions (DAR-5) is a brief 5-item instrument to assess experience of anger. We aimed to verify the DAR-5 as a screening instrument in the community. A sample of 368 apparently healthy adults who attended an outpatient ambulatory facility self-reported on the DAR-5 scale, the Spielberger's State-Trait Anger Expression Inventory (STAXI), the Beck Anxiety Inventory (BAI), and the Patient Health Questionnaire (PHQ-9). Indicators of reliability and validity were calculated to demonstrate the performance of the DAR-5. According to the DAR-5, around half the respondents found themselves becoming angry with people or situations and reported persistent duration of anger. Antagonism towards others was the least frequently experienced anger (8.4%). The DAR-5 was found to be reliable and stable, showing a significant correlation with the BAI and PHQ-9 for both sexes. In confirmatory factor analysis, a one-dimensional structure of anger experience was demonstrated through salient fit statistics. A cut-off > 8 was the best threshold against STAXI for discriminating cases of anger, irrespective of sex. The shortness of the DAR-5, along with its cost-effective applicability, qualifies this measuring tool as a useful instrument for inclusion in the routine assessment of anger reactions in the general population.Key pointsThis is the first time the validity of DAR-5 has been demonstrated in a developing country.The Portuguese version of DAR-5 has appropriate sensitivity and high specificity.The DAR-5 demonstrated to be a reliable and stable instrument, irrespective of sex. This is the first time the validity of DAR-5 has been demonstrated in a developing country. The Portuguese version of DAR-5 has appropriate sensitivity and high specificity. The DAR-5 demonstrated to be a reliable and stable instrument, irrespective of sex.
Teacher preparation for art curriculum implementation
Creators: name: Blatherwick, Mary Louise
Publisher: name: University of British Columbia
Year: 2010

description: This study addresses the question of how well prepared are elementary teachers in British Columbia to implement the New Elementary Fine Arts Curriculum Guide/Resource Book. Through questionnaires and interviews conducted with elementary teachers in a large Lower Mainland school district and university elementary art methods course instructors at three universities in British Columbia, it was possible to identify and discuss some of the educational factors that influence curriculum implementation in art. This study offers recommendations to promote a more unified approach to implementation by the Ministry of Education, curriculum committees, teacher educators and teachers, to ultimately improve the art education that is offered to elementary school students.
Variable stars in the Fornax dSph Galaxy. I. The Globular Cluster Fornax 4
Creators: name: Greco, C.
name: Clementini, G.
name: Catelan, M.
name: Held, E. V.
name: Poretti, E.
name: Gullieuszik, M.
name: Maio, M.
name: Rest, A.
name: De Lee, N.
name: Smith, H. A.
name: Pritzl, B. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Variable stars have been identified for the first time in Fornax 4, the globular cluster located near the center of the Fornax dwarf spheroidal galaxy. By applying the image subtraction technique to B,V time series photometry obtained with the MagIC camera of the 6.5-m Magellan/Clay telescope and with the wide field imager of the 4-m Blanco/CTIO telescope, we detected 27 RR Lyrae stars (22 fundamental mode, 3 first overtone, and 2 double-mode pulsators) in a 2.4'x2.4' area centered on Fornax 4. The average and minimum periods of the ab-type RR Lyrae stars, = 0.594 d and P(ab,min)=0.5191 d, respectively, as well as the revised position of the cluster in the horizontal branch type--metallicity plane, all consistently point to an Oosterhoff-intermediate status for the cluster, unlike what is seen for the vast majority of Galactic globular clusters, but in agreement with previous indications for the other globular clusters in Fornax. The average apparent magnitude of the RR Lyrae stars located within 30 arcsec from the cluster center is =21.43 +/- 0.03 mag (sigma=0.10 mag, average on 12 stars), leading to a true distance modulus of (m-M)o=20.64 +/- 0.09 mag or (m-M)o=20.53 +/- 0.09 mag, depending on whether a low ([Fe/H]=-2.0) or a moderately high ([Fe/H]=-1.5) metallicity is adopted.
description: Apj, in press
Near-Zero Moment Ferromagnetism in the Semiconductor SmN
Creators: name: Meyer, C.
name: Ruck, B. J.
name: Zhong, J.
name: Granville, S.
name: Preston, A. R. H.
name: Williams, G. V. M.
name: Trodahl, H. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic behaviour of SmN has been investigated in stoichiometric polycrystalline films. All samples show ferromagnetic order with Curie temperature (T_c) of 27 +/- 3 K, evidenced by the occurrence of hysteresis below T_c. The ferromagnetic state is characterised by a very small moment and a large coercive field, exceeding even the maximum applied field of 6 T below about 15 K. The residual magnetisation at 2 K, measured after cooling in the maximum field, is 0.035 mu_B per Sm. Such a remarkably small moment results from a near cancellation of the spin and orbital contributions for Sm3+ in SmN. Coupling to an applied field is therefore weak, explaining the huge coercive field . The susceptibility in the paramagnetic phase shows temperature-independent Van Vleck and Curie-Weiss contributions. The Van Vleck contribution is in quantitative agreement with the field-induced admixture of the J=7/2 excited state and the 5/2 ground state. The Curie-Weiss contribution returns a Curie temperature that agrees with the onset of ferromagnetic hysteresis, and a conventional paramagnetic moment with an effective moment of 0.4 mu_B per Sm ion, in agreement with expectations for the crystal-field modified effective moment on the Sm3+ ions.
description: 5 pages, 3 figures
Fractional time stepping and adjoint based gradient computation in an inverse problem for a fractionally damped wave equation
Creators: name: Kaltenbacher, Barbara
name: Schlintl, Anna
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this paper we consider the inverse problem of identifying the initial data in a fractionally damped wave equation from time trace measurements on a surface, as relevant in photoacoustic or thermoacoustic tomography. We derive and analyze a time stepping method for the numerical solution of the corresponding forward problem. Moreover, to efficiently obtain reconstructions by minimizing a Tikhonov regularization functional (or alternatively, by computing the MAP estimator in a Bayesian approach), we develop an adjoint based scheme for gradient computation. Numerical reconstructions in two space dimensions illustrate the performance of the devised methods.
The interplay between radio galaxies and cluster environment
Creators: name: Magliocchetti, M.
name: Bruggen, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By combining the REFLEX and NORAS cluster datasets with the NVSS radio catalogue, we obtain a sample of 145, z<0.3, X-ray selected clusters brighter than 3 10^(-12) erg/s/cm^2 that show a central radio emission above 3 mJy. For virial masses M_vir
description: 17 pages, 14 figures, to appear in MNRAS
Robust Models for Phase Shifts in Accreting Binary Stars
Creators: name: Cantrell, Andrew G.
name: Bailyn, Charles D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radial velocity studies of accreting binary stars commonly use accretion disk emission lines to determine the radial velocity of the primary star and therefore the mass ratio. These emission line radial velocity curves are often shifted in phase from the expected motion of the primary. These phase shifts cast doubt on the use of disk emission lines in the determination of mass ratios. We present a systematic study of phase shifts, using data from the literature to distinguish between possible explanations of the phase shift. We find that one widely adopted class of models is contradicted by observations (section 2). We present a generalized form of another class of models, which we call "measurement offset models." We show that these models are quantitatively consistent with existing data (figures 2 and 3, and the discussion in section 4.4). We consider the implications of adopting measurement offset models, for both disk structure and determination of binary parameters. Specifically, we describe in section 6 how measurement offset models may be used improve determinations of the mass ratio based on disk emission lines. This could be a valuable new tool in determining masses of important astrophysical objects such as accreting neutron stars and black holes.
description: 38 pages, 3 figures, to be published in ApJ
The incidence and economic impact of aggression in closed long-stay psychiatric wards
Creators: name: de Bles, Nienke J.
name: Hazewinkel, Andreia W. P.
name: Bogers, Jan P. A. M.
name: van den Hout, Wilbert B.
name: Mouton, Constant
name: van Hemert, Albert M.
name: Ottenheim, Nathaly Rius
name: Giltay, Erik J.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Aggressive behaviour is highly prevalent in long-term psychiatric inpatient care. We aimed to estimate the overall incidence of aggression, the time staff took to handle aggression incidents, and the weighted average financial costs thereof. A random sampling procedure was conducted at long-term psychiatric inpatient care facilities. Nurses were asked to recall all incidents (i.e., verbal, physical towards objects, self, or others) of their shift. For the time spent on each type of incident, staff were monitored in real-time. Estimated costs were calculated by the time spent multiplied by hourly wages in addition to material-related costs. Incidence rates were 90 incidents per patient year. The average time spent per incident was 125 min but differed for each type of incident. Almost 80% of this time was consumed by nursing staff. The average cost per aggression incident was €78; extrapolated per patient year, the total costs were approximately €7000. The current study found a high rate of aggression incidents in closed long-stay psychiatric wards. Reports of aggression on these types of wards are scarce. Nevertheless, aggression seems to have a severe impact on invested time and related costs, which suggests a need for aggression-prevention and de-escalating programs.Key pointsAggression incidents are highly prevalent and are accompanied by high costs.The effect of aggression incidents on the workload for staff members is high, especially for nursing staff.Studies across countries on the incidence and the costs of aggression among psychiatric inpatients are needed to help model the effects of (new) strategies for aggression reduction. Aggression incidents are highly prevalent and are accompanied by high costs. The effect of aggression incidents on the workload for staff members is high, especially for nursing staff. Studies across countries on the incidence and the costs of aggression among psychiatric inpatients are needed to help model the effects of (new) strategies for aggression reduction.
Robustness of spin-polarized edge states in a two-dimensional topological semimetal without inversion symmetry
Creators: name: Mella, Jose. D.
name: Torres, Luis E. F. Foa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Three-dimensional topological gapless phases have attracted significant attention due to their unique electronic properties. A flagship example are Weyl semimetals, which require breaking time-reversal or inversion symmetry. In two dimensions, the dimensionality reduction requires imposing an additional symmetry, thereby weakening the phase. Like its three-dimensional counterpart, these two-dimensional Weyl semimetals present edge states directly related to Weyl nodes. The direct comparison with the edge states in zigzag-like terminated graphene ribbons is unavoidable, offering the question of how robust these states are and their differences. Here we benchmark the robustness of the edge states in two-dimensional Weyl semimetals without inversion symmetry with those present in zigzag graphene ribbons. Our results show that, despite having a similar electronic band structure, the edge states of two-dimensional Weyl semimetal are more robust against vacancies than graphene ribbons. We attribute this enhanced robustness to a crucial role of the spin degree of freedom in the former case
description: 8 pages, 6 figures
Friendship understanding in socially accepted, rejected, and neglected children
Creators: name: Bichard, Sandra Lynn
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this study was to determine whether children with poor peer relations display a developmental lag in their conceptions of friendship. The social-cognitive level of friendship understanding, as outlined in Selman's Theory of Interpersonal Understanding, was compared in a sample of 31 second-grade and 40 seventh-grade children who were identified as being accepted, rejected, or neglected by peers, according to a peer sociometric nomination measure. As expected, results indicated that conceptions of friendship held by grade 7 children represented higher stages of social-cognitive development than conceptions held by grade 2 children. Results also indicated there was no difference among accepted, rejected, and neglected children in their general intellectual abilities, as measured by the Vocabulary and Block Design subtests of the WISC-R. However, contrary to experimental predictions, when compared with their socially accepted classmates, rejected and neglected children did not show a developmental lag in their understanding of friendship. If the social effectiveness of social isolates from normal school populations is not limited by immature conceptions of interpersonal relations, as has been found in clinic populations, then intervention programs for these children may need to target other social-cognitive (e.g., interpersonal problem solving skills) or behavioral skills (e.g., prosocial behavior) or affective difficulties (e.g., social anxiety) as primary therapeutic goals. The possibility that an interpersonal reasoning enrichment component of a treatment package focusing on one or more of these other aspects of social competence needs to be empirically evaluated.