cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
«Nazariy va amaliy tadqiqotlar xalqaro jurnali» Ilmiy jurnal - "International journal of theoretical and practical research" Scientific Journal. November, 2021.
Creators: name: Dr.R. Lilambeswara Singh
name: St.Johns
name: Horska, Elena
name: Abdullaev, Alisher
name: Fayziev, Zakhid
name: Khasanov, Tokhir
name: Khodjaeva, Nodira
name: Kurpayanidi, Konstantin
name: Margianti, Eco S.
name: Ikramov, Murat
name: Nishonov, Farkhod
name: Urmonov, Alisherjon
name: Robby, Loho
name: Teddy, Oswari
name: Anugerah, Adhi Prasetyo
Publisher: name: Zenodo
Year: 2021
Subjects: Multidisciplinary Electronic Scientific Journal

description: Multidisciplinary Electronic Scientific Journal
Improved actions and lattice coarsening effects in MCRG studies in SU(2) LGT
Creators: name: Tomboulis, E. T.
name: Velytsky, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study decimation procedures and effective (improved) actions in the framework of Monte Carlo Renormalization Group (MCRG). Particular attention is paid to matching the form of the effective action to the decimation procedure parameters. Using the static quark-antiquark potential in SU(2) LGT we probe different distance scales and find that an effective action containing multiple group representations is capable of reproducing long distance physics well. In particular, appropriate matching results in the practical elimination of the coarsening/fining effect of the lattice spacing under decimation. The short distance regime of the effective theory is also studied. We next carry out studies of effective actions involving both multiple representations and loops beyond the single plaquette towards determining an improved action good over a wide length scale regime.
description: 7 pages, 4 figures; Lattice 2007 (Theoretical developments)
The significance of low frequency interferometric observations for the GPS pulsar flux estimation: the case of J1740+1000
Creators: name: Rozko, K.
name: Kijak, J.
name: Chyzy, K.
name: Lewandowski, W.
name: Shimwell, T.
name: Sridhar, S. S.
name: Curylo, M.
name: Krankowski, A.
name: Blaszkiewicz, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we present recent Low Frequency Array (LOFAR) observations of the pulsar J1740+1000. We confirm that its spectrum has a turnover at 260 MHz, which is unusual for a typical pulsar. We argue that in this case interferometric imaging provides more accurate pulsar flux estimates than other, more traditional, means such as beamformed observations. We conclude that existing calibration and imaging techniques can be used for a more comprehensive study of the influence of the interstellar medium on the point-like sources at very low frequencies in the near future.
description: 6 pages, 3 figures
LiLa: Linking Latin. Building a Knowledge Base of Linguistic Resources for Latin
Creators: name: Passarotti, Marco Carlo
name: Mambrini, Francesco
name: Litta, Eleonora
name: Franzini, Greta
name: Peverelli, Andrea
name: Cecchini, Flavio Massimiliano
name: Sprugnoli, Rachele
Publisher: name: Zenodo
Year: 2019
Subjects: latin
linguistics
digital humanities
digital classics
linked data

description: The LiLa: Linking Latin project was recently awarded funding from the European Research Council to build a Knowledge Base of linguistic resources for Latin. LiLa responds to the growing need in the fields of Computational Linguistics, Humanities Computing and Classics to create an interoperable ecosystem of resources and Natural Language Processing tools for Latin. To this end, LiLa makes use of Linked Open Data practices and standards to connect words to distributed textual and lexical resources via unique identifiers. In so doing, it builds rich knowledge graphs, which can be used for research and teaching purposes alike. This paper details the architecture of the LiLa Knowledge Base and presents the solutions found to address the challenges raised by populating it with a first set of linguistic resources.
Trans-border Security Threats in the Horn of Africa and Their Security Implications in Ethiopia
Creators: name: Kassaw, Alene
Publisher: name: Abyssinia Journal of Business and Social Sciences
Year: 2018

description: The Horn of Africa sub-region where Ethiopia is a constituent part has been a hotbed of crises with local and global dimensions. What is worse, the region has been facing threats from what is termed as new security challenges: small arms circulation, illegal migration, cattle rustling, child abduction, terrorism, human and drug trafficking, illegal migration, cyber-crimes, maritime piracy, small arms proliferation etc. With the use of secondary sources such as peer-reviewed journals, books, magazines, official documents such as reports, proclamations, as well as policy and strategy papers, and publications issued by government as well as non-government organizations on the subject, and in-depth or unstructured interviews with key informants, the study investigatedthat the Horn of Africa in general and Ethiopia in particular have faced the brunt of transnational security.First, Ethiopia has been receiving a massive influx of refugees. Secondly, trans-border child abduction is a security threat to communities and ethnic groups living in the south western part of Ethiopia. In addition, the Hornplays as a source, transit and a destination for victims of trafficking and smuggling.Thirdly, pastoralconflict mainly cattle rustling in the region resulted inheavy loss of human life, property; displacements of large segments of the communities, and disruption of socio-economic activities and livelihoods. Moreover, trafficking and circulation of small arms in the hands of cattle rustlers, refugees, migrant smugglers and traffickers has adverse security impacts by prolonging conflicts, promoting crime and armed violence and slowing down the development of social and economic stability.
description: Abyssinia Journal of Business and Social Sciences , Vol. 3 No. 2 (2018)
The Nature of Hyperluminous Infrared Galaxies
Creators: name: Gao, F.
name: Wang, L.
name: Efstathiou, A.
name: Małek, K.
name: Best, P. N.
name: Bonato, M.
name: Farrah, D.
name: Kondapally, R.
name: McCheyne, I.
name: Röttgering, H. J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We make use of multi-wavelength data of a large hyperluminous infrared (HLIRG) sample to derive their main physical properties, e.g., stellar mass, star-formation rate (SFR), volume density, contribution to the cosmic stellar mass density and to the cosmic SFR density. We also study the black hole (BH) growth rate and its relationship with the SFR of the host galaxy. We select 526 HLIRGs in three deep fields (Bo$ö$tes, Lockman-Hole, ELAIS-N1) and adopt two spectral energy distribution (SED) fitting codes, CIGALE, which assumes energy balance, and CYGNUS, which is based on radiative transfer models and does not adopt energy balance principle. We use two different active galactic nucleus (AGN) models in CIGALE and three AGN models in CYGNUS to compare the results estimated using different SED fitting codes and different AGN models. The stellar mass, total IR luminosity and AGN luminosity agree well between different models with a typical median offset of 0.1 dex. The SFR estimates show the largest dispersions (up to 0.5 dex). This dispersion has an impact on the subsequent analysis, which may suggest that previous contradictory results could partly be due to different choices of methods. HLIRGs are ultra-massive galaxies with 99% of them having stellar masses larger than $10^{11} M_{\odot}$. Our results reveal a higher space density of ultra-massive galaxies than found in previous surveys or predicted by simulations. We find that HLIRGs contribute more to the cosmic SFR density as redshift increases. In terms of BH growth, the two SED fitting methods provide different results. We can see a clear trend in which SFR decreases as AGN luminosity increases when using CYGNUS estimates, possibly implying quenching by AGN, while this trend is much weaker when using CIGALE estimates. This difference is also influenced by the dispersion between SlFR estimates obtained by the two codes.
description: 21 pages, 15 figures. Accepted in A&A
TRIGA-SPEC: A setup for mass spectrometry and laser spectroscopy at the research reactor TRIGA Mainz
Creators: name: Ketelaer, J.
name: Krämer, J.
name: Beck, D.
name: Blaum, K.
name: Block, M.
name: Eberhardt, K.
name: Eitel, G.
name: Ferrer, R.
name: Geppert, C.
name: George, S.
name: Herfurth, F.
name: Ketter, J.
name: Nagy, Sz.
name: Neidherr, D.
name: Neugart, R.
name: Nörtershäuser, W.
name: Repp, J.
name: Smorra, C.
name: Trautmann, N.
name: Weber, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The research reactor TRIGA Mainz is an ideal facility to provide neutron-rich nuclides with production rates sufficiently large for mass spectrometric and laser spectroscopic studies. Within the TRIGA-SPEC project, a Penning trap as well as a beam line for collinear laser spectroscopy are being installed. Several new developments will ensure high sensitivity of the trap setup enabling mass measurements even on a single ion. Besides neutron-rich fission products produced in the reactor, also heavy nuclides such as 235-U or 252-Cf can be investigated for the first time with an off-line ion source. The data provided by the mass measurements will be of interest for astrophysical calculations on the rapid neutron-capture process as well as for tests of mass models in the heavy-mass region. The laser spectroscopic measurements will yield model-independent information on nuclear ground-state properties such as nuclear moments and charge radii of neutron-rich nuclei of refractory elements far from stability. This publication describes the experimental setup as well as its present status.
description: 20 pages, 17 figures
LiLa: Linking Latin. Building a Knowledge Base of Linguistic Resources for Latin
Creators: name: Passarotti, Marco
name: Mambrini, Francesco
name: Litta, Eleonora
name: Franzini, Greta
name: Peverelli, Andrea
name: Cecchini, Flavio Massimo
name: Sprugnoli, Rachele
Publisher: name: Zenodo
Year: 2019
Subjects: latin
linguistics
digital humanities
digital classics
linked data

description: The LiLa: Linking Latin project was recently awarded funding from the European Research Council to build a Knowledge Base of linguistic resources for Latin. LiLa responds to the growing need in the fields of Computational Linguistics, Humanities Computing and Classics to create an interoperable ecosystem of resources and Natural Language Processing tools for Latin. To this end, LiLa makes use of Linked Open Data practices and standards to connect words to distributed textual and lexical resources via unique identifiers. In so doing, it builds rich knowledge graphs, which can be used for research and teaching purposes alike. This paper details the architecture of the LiLa Knowledge Base and presents the solutions found to address the challenges raised by populating it with a first set of linguistic resources.
Typical elements in free groups are in different doubly-twisted conjugacy classes
Creators: name: Staecker, P. Christopher
Publisher: name: arXiv
Year: 2008
Subjects: subject: Group Theory (math.GR)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 20F10, 54H25

description: We give an easily checkable algebraic condition which implies that two elements of a finitely generated free group are members of distinct doubly-twisted conjugacy classes with respect to a pair of homomorphisms. We further show that this criterion is satisfied with probability 1 when the homomorphisms and elements are chosen at random.
description: 11 pages, synchronized with published version
Mukasa Daisy_Feedback Report (December 2020).pdf
Creators: name: Mukasa, Daisy
Publisher: name: figshare
Year: 2021
Subjects: subject: 169999 Studies in Human Society not elsewhere classified
subject: FOS: Sociology

description: This is a feedback report of the first prototyping stage where I held interviews with different members of the community in Western Kenya in order to understand their view of obstetric fistula and their willingness to attend awareness creation workshops.
Structure-preserving finite difference schemes for nonlinear wave equations with dynamic boundary conditions
Creators: name: Umeda, Akihiro
name: Wakasugi, Yuta
name: Yoshikawa, Shuji
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this article we discuss the numerical analysis for the finite difference scheme of the one-dimensional nonlinear wave equations with dynamic boundary conditions. From the viewpoint of the discrete variational derivative method we propose the derivation of the structure-preserving finite difference schemes of the problem which covers a variety of equations as widely as possible. Next, we focus our attention on the semilinear wave equation, and show the existence and uniqueness of solution for the scheme and error estimates with the help of the inherited energy structure.
description: 27 pages, 5 figures
Formation and evolution of galactic spheroids by mergers
Creators: name: Naab, Thorsten
name: Burkert, Andreas
name: Johansson, Peter H.
name: Jesseit, Roland
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Galactic spheroids can form as a result of galaxy interactions and mergers of disks. Detailed analyses of the photometric properties, the intrinsic orbital structure, the line-of-sight velocity distributions and the kinemetry of simulated merger remnants, which depend critically on the geometry and the gas content of the interacting progenitors, indicate that low and intermediate mass rotating ellipticals can form from mergers of disks. The masses and metallicities of all massive ellipticals and the kinematics of some massive non-rotating ellipticals cannot be explained by binary mergers. Thus these galaxies might have formed in a different way.
description: Conference proceedings, IAU Symposium 245, Formation and Evolution of Galaxy Bulges, Oxford, July 16-20 2007
Non-Newtonian oil flow through porous media
Creators: name: Fariss, Tariq Fariss Al-
Publisher: name: University of British Columbia
Year: 2010

description: A mathematical and experimental investigation was made of the flow through porous media of non-Newtonian fluids with yield stresses. The analysis of the problem was made in three parts: 1) Two models were developed to describe the flow through porous media of a power-law fluid with yield stress, la) Darcy's law was modified by coupling the Herschel-Bulkley rheological model with the capillary flow model and hydraulic gradient description of a porous medium to generate a generalized form of the flow equation as: [See Thesis for Chemical Diagrams] 2a) An oil which exhibited a rheological behaviour which was well described by the Herschel-Bulkley model was developed by adding paraffin wax to Newtonian oils. Two oils were used, Clarus-B and Clarus-C oils supplied by Shell Canada Company, with 2.5%, 4% and 5% paraffin wax for the preliminary tests. Crude oil from the Peace River field in Alberta was also found to exhibit the same behaviour. 2b) The flow characteristics of the test oils and the crude oil were measured using a rotational viscometer (Haake Rotovisco RV-12). 3) The three types of waxy oils were tested in two sand beds of 91 and 100 cm length with two sizes of particles 0.077 and 0.128 cm respectively, thus giving D[sub c]/D[sub p] ratios of 62.7 and 79.4 and porosities of 0.36 and 0.44. The flow behaviours of the waxy oils through the porous medium were determined over a wide range of flow rates (0.0057-17.4 ml/sec), Reynolds numbers (3.38 x 10⁻⁸- 0.33), pressure drops (3.11 - 299.6 kPa) , friction factors (8.9 x 10² - 2.86 x 10⁹), yield stresses (0.71 - 69.37 dyne/cm²), and temperatures (2-20°C). The experimental results show agreement with the mathematical models in the range of flow rates investigated. An average error of 3.64% and 5.5% was obtained with Clarus C and B respectively. The crude oil gave an average error 3.9%. The logarithmic least square fit of the f* - R*[sub e] correlation gave a correlation coefficient of 0.98 for the two artificial waxy oils, while the crude oil showed excellent fit for the correlation in a wide range of Reynolds numbers in the laminar region. There was some scatter in the data which was explained by sensitivity of the fitting parameter- (K) to small errors in the measurements of the rheological parameters n, τ[sub o] and H.
Viscous coupled fluids in terms of a log-corrected equation of state
Creators: name: Brevik, I.
name: Myrzakulov, K.
name: Timoshkin, A. V.
name: Zhadyranova, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a class of cosmological fluids that possess properties analogous to those of crystalline solids undergoing isotropic deformations. Our research is based on a modified log-corrected power-law equation of state in the presence of a bulk viscosity. This formalism represents a class of so-called logotropic fluids, and allows explaining an accelerating late-time universe. In order to obtain a more detailed picture of its evolution, we add in our model a coupling of the log-corrected power-law fluid to dark matter, and study various interacting forms between them. We solve the system of equations for a modified log-power-law fluid coupled to dark matter, and obtain expressions for the log-corrected power-law energy density, and the energy density for dark matter. A comparative analysis is made with the model of a nonviscous log-corrected power-law fluid without interaction with dark matter.
description: 15 pages latex, author list corrected. To appear in Int. J. Geom. Meth. Mod. Phys
Seismic study of the chemical composition of the solar convection zone
Creators: name: Lin, Chia-Hsien
name: Antia, H. M.
name: Basu, Sarbani
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent downward revision of solar heavy-element abundances using three-dimensional atmospheric model has introduced serious discrepancies between standard solar models and helioseismic inferences about solar structure. In this paper, we investigate the possibility of determining the heavy-element abundances using helioseismic inversion techniques with the hope of providing an independent estimate. We use the adiabatic index, Gamma_1 (logarithmic partial derivative of pressure with respect to density at constant entropy) as a probe to examine the effects of the total heavy-element abundance, as well as the effects due to the abundance of individual elements. Our inversion results show that the new, lower, abundance increases the discrepancy between the Sun and the solar models.
description: Accepted for publication in ApJ
Towards Resolution Services for Text URIs
Creators: name: Cayless, Hugh
name: Romanello, Matteo
Publisher: name: Zenodo
Year: 2019

description: Paper presented at the Workshop on Scholarly Digital Editions, Graph Data-Models and Semantic Web Technologies, organised by Elena Spadini (UNIL) and Francesca Tomasi (University of Bologna), and held at the University of Lausanne on 3-4 June 2019.
High Dimensional Decision Making, Upper and Lower Bounds
Creators: name: Pourbabaee, Farzad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: Machine Learning (stat.ML)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: A decision maker's utility depends on her action $a\in A \subset \mathbb{R}^d$ and the payoff relevant state of the world $θ\in Θ$. One can define the value of acquiring new information as the difference between the maximum expected utility pre- and post information acquisition. In this paper, I find asymptotic results on the expected value of information as $d \to \infty$, by using tools from the theory of (sub)-Guassian processes and generic chaining.
The Radio Properties of Type Ibc Supernovae
Creators: name: Soderberg, Alicia M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all these events result from the death of massive stars, the electromagnetic luminosities of GRBs and XRFs exceed those of ordinary Type Ibc SNe by many orders of magnitude. The observed diversity of stellar death corresponds to large variations in the energy, velocity, and geometry of the explosion ejecta. Using multi-wavelength (radio, optical, X-ray) observations of the nearest GRBs, XRFs, and SNe Ibc, I show that while GRBs and XRFs couple at least 10^48 erg to relativistic material, SNe Ibc typically couple less than 10^48 erg to their fastest (albeit non-relativistic) outflows. Specifically, I find that less than 3% of local SNe Ibc show any evidence for association with a GRB or XRF. Recently, a new class of GRBs and XRFs has been revealed which are under-luminous in comparison with the statistical sample of GRBs. Owing to their faint high-energy emission, these sub-energetic bursts are only detectable nearby (z < 0.1) and are likely 10 times more common than cosmological GRBs. In comparison with local SNe Ibc and typical GRBs/XRFs, these explosions are intermediate in terms of both volumetric rate and energetics. Yet the essential physical process that causes a dying star to produce a GRB, XRF, or sub-energetic burst, and not just a SN, remains a crucial open question. Progress requires a detailed understanding of ordinary SNe Ibc which will be facilitated with the launch of wide-field optical surveys in the near future.
description: 8 pages, Proceedings for "Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters" AIP, New York, eds. S. Immler, K.W. Weiler, and R. McCray
Chirally symmetric but confining dense and cold matter
Creators: name: Glozman, L. Ya.
name: Wagenbrunn, R. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The folklore tradition about the QCD phase diagram is that at the chiral restoration phase transition at finite density hadrons are deconfined and there appears the quark matter. We address this question within the only known exactly solvable confining and chirally symmetric model. It is postulated within this model that there exists linear Coulomb-like confining interaction. The chiral symmetry breaking and the quark Green function are obtained from the Schwinger-Dyson (gap) equation while the color-singlet meson spectrum results from the Bethe-Salpeter equation. We solve this model at T=0 and finite chemical potential $μ$ and obtain a clear chiral restoration phase transition at the critical value μ_{cr}. Below this value the spectrum is similar to the previously obtained one at μ= 0. At μ> μ_{cr} the quarks are still confined and the physical spectrum consists of bound states which are arranged into a complete set of exact chiral multiplets. This explicitly demonstrates that a chirally symmetric matter consisting of confined but chirally symmetric hadrons at finite chemical potential is also possible in QCD. If so, there must be nontrivial implications for astrophysics.
description: 7 pp; the paper has been expanded to make some technical details more clear; 3 new figures have been added. To appear in PRD
Radiative Seesaw Dark Matter
Creators: name: Ma, Ernest
name: De Romeri, Valentina
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The singlet majoron model of seesaw neutrino mass is appended by one dark Majorana fermion singlet $χ$ with $L=2$ and one dark complex scalar singlet $ζ$ with $L=1$. This simple setup allows $χ$ to obtain a small radiative mass anchored by the same heavy right-handed neutrinos, whereas the one-loop decay of the standard-model Higgs boson to $χχ+ \barχ \barχ$ provides the freeze-in mechanism for $χ$ to be the light dark matter of the Universe.
description: 11 pages, 5 figures
Four-loop screened perturbation theory
Creators: name: Andersen, Jens O.
name: Kyllingstad, Lars
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the thermodynamics of massless phi-fourth theory using screened perturbation theory. In this method, the perturbative expansion is reorganized by adding and subtracting a thermal mass term in the Lagrangian. We calculate the free energy through four loops expanding in a double power expansion in m/T and g^2, where m is the thermal mass and g is the coupling constant. The expansion is truncated at order g^7 and the loop expansion is shown to have better convergence properties than the weak-coupling expansion. The free energy at order g^6 involves the four-loop triangle sum-integral evaluated by Gynther, Laine, Schroeder, Torrero, and Vuorinen using methods developed by Arnold and Zhai. The evaluation of the free energy at order g^7 requires the evaluation of a nontrivial three-loop sum-integral, which we calculate by the same methods.
description: 34 pages, 6 figures, RevTeX
A Dark Core in Abell 520
Creators: name: Mahdavi, A.
name: Hoekstra, H.
name: Babul, A.
name: Balam, D.
name: Capak, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The rich cluster Abell 520 (z=0.201) exhibits truly extreme and puzzling multi-wavelength characteristics. It may best be described as a "cosmic train wreck." It is a major merger showing abundant evidence for ram pressure stripping, with a clear offset in the gas distribution compared to the galaxies (as in the bullet cluster 1E 0657-558). However, the most striking feature is a massive dark core (721 h_70 M_sun/L_sun) in our weak lensing mass reconstruction. The core coincides with the central X-ray emission peak, but is largely devoid of galaxies. An unusually low mass to light ratio region lies 500 kpc to the east, and coincides with a shock feature visible in radio observations of the cluster. Although a displacement between the X-ray gas and the galaxy/dark matter distributions may be expected in a merger, a mass peak without galaxies cannot be easily explained within the current collisionless dark matter paradigm. Interestingly, the integrated gas mass fraction (~0.15), mass-to-light ratio (220 h_70 M_sun/L_sun), and position on the X-ray luminosity-temperature and mass-temperature relations are unremarkable. Thus gross properties and scaling relations are not always useful indicators of the dynamical state of clusters.
description: 10 pages, 5 figures, accepted for publication in the Astrophysical Journal, higher resolution version at http://visav.phys.uvic.ca/~amahdavi
Coal pyrolysis : chemistry and kinetics in a flow reactor
Creators: name: McCafferty, Timothy P.
Publisher: name: University of British Columbia
Year: 2010

description: Coal conversion technologies offer the potential to supplement and improve the supply of liquid fuels. Coal pyrolysis involves the thermal degradation of coal in an inert atmosphere to generate liquids (tar), gases and char. The ultimate commercial viability of such a conversion process must examine all of the quantitative (yield) and qualitative aspects of the products. A theoretical and experimental program was undertaken to study the variables affecting the product yield and selectivities from coal pyrolysis. A review was made of a variety of pyrolysis reactions of pure compounds possessing the same chemical functional groups as those identified in coal organic matter. A generalized hydrocarbon reaction flow diagram was developed to consolidate the reaction possibilities in coal pyrolysis and to attempt to derive a priori kinetic model. This led to rationalizations of observed trends and predictions which guided the experimental work undertaken. Experimentally, a complete lab scale pyrolysis system was designed and constructed. Investigations were directed at the effects of temperature, vapour residence time, coal loading, reactor area/volume ratios and oxygen on the product yields from the pyrolysis of Balraer coal from southeastern British Columbia. To assess the value of each product a number of analytical procedures were developed. Solvent partitioning, solubility, preparative and high performance liquid chromatography and infrared spectroscopy were used on the tars obtained. Chars were characterized by thermal gravimetric analysis. Pyrolysis off-gases were analyzed by gas chromatography. Highest tar yields were observed when dilute phase loading, short residence times (< 1 s) and intemediate temperatures (600-800°C) were employed. In all cases, however, improvements in liquid total tar yield were entirely attributable to the greater yield of undesirable asphaltenes. The yields of desirable tar components, aromatics and saturates, remained essentially unchanged over the entire temperature, time and loading range. Increasing the reactor area/volume ratio had a detrimental effect on tar yield but a slightly advantageous impact on the selectivity of aromatics. Char quality, as measured by the content of residual volatiles, showed a constant decrease with increasing pyrolysis temperature. In terms of overall product value, total tar yield is not the most reliable indicator of commercial viability. Rather, some considerations of product quality is required. Based on the combined experimental and theoretical consideration a number of recommendations are made for improved reactor design and future pyrolysis research.
Recommendations for filling identified gaps in standards for land and nutrition data
Creators: name: Yates, Deborah
name: Dodds, Leigh
name: Tennison, Jeni
name: Pesce, Valeria
name: Zervas, Panagiotis
Publisher: name: F1000 Research Limited
Year: 2019

description: This report provides a number of recommendations to improve practices around the creation and use of standards that support the collection and use of land and nutrition data.

We have drawn on the analyses of gaps in land and nutrition standards reported in our survey of data standards for land and nutrition data (Pesce, Mey, L’Hénaff and Tejo-Alonso, 2018). Land data, like geology, soil and irrigation, and nutrition data, like food consumption and health statistics, are important to inform decision making for interventions to eradicate global hunger and malnutrition. The collection of land and nutrition data varies globally. Like all data, different countries are at different levels of maturity with regards to the way this information is collected, stored, accessed and used.

The recommendations draw on our assessments of the existing gaps between current and best practice in two data aggregator use cases. We think the key opportunities around improving use of standards around land and nutrition data should focus on:

	improving the documentation and description of existing data sources, in particular through the creation of developer documentation and by investing in publishing relevant vocabularies (e.g. indicators, geographic regions, country names and age groups)
	attempting to address discovery issues relating to land and nutrition data, by improving use of metadata standards to help catalogue and describe data published by existing organisations as well as harmonising existing or developing new standards.
	working with data publishers to harmonise and publish open standards in a variety of formats, so that different user communities (developers, statisticians, analysts, geospatial specialists) can consume and use data in an efficient way.
	working with relevant authorities to map and publish sustainable development indicators with definitions and mappings.
	engage with relevant user communities to promote standards, by working with data providers.

These recommendations will be combined with those from previous GODAN Action recommendation reports on agri-food and weather data standards. Together they will inform specifications for standards interoperability services that can help to drive adoption of standards such as tools to publish data into different formats, to support open metadata standards or share standard vocabularies.
Regstar: Efficient Strategy Synthesis for Adversarial Patrolling Games
Creators: name: Klaška, David
name: Kučera, Antonín
name: Musil, Vít
name: Řehák, Vojtěch
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: We design a new efficient strategy synthesis method applicable to adversarial patrolling problems on graphs with arbitrary-length edges and possibly imperfect intrusion detection. The core ingredient is an efficient algorithm for computing the value and the gradient of a function assigning to every strategy its "protection" achieved. This allows for designing an efficient strategy improvement algorithm by differentiable programming and optimization techniques. Our method is the first one applicable to real-world patrolling graphs of reasonable sizes. It outperforms the state-of-the-art strategy synthesis algorithm by a margin.
description: UAI 2021 conference paper
Kaluza-Klein dimensional reduction and Gauss-Codazzi-Ricci equations
Creators: name: Wang, Pei
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we imitate the traditional method which is used customarily in the General Relativity and some mathematical literatures to derive the Gauss-Codazzi-Ricci equations for dimensional reduction. It would be more distinct concerning geometric meaning than the vielbein method. Especially, if the lower dimensional metric is independent of reduced dimensions the counterpart of the symmetric extrinsic curvature is proportional to the antisymmetric Kaluza-Klein gauge field strength. For isometry group of internal space, the SO(n) symmetry and SU(n) symmetry are discussed. And the Kaluza-Klein instanton is also enquired.
description: 15 pages
Device-independent quantum key distribution based on Bell inequalities with more than two inputs and two outputs
Creators: name: Gonzales-Ureta, Junior R.
name: Predojević, Ana
name: Cabello, Adán
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Device-independent quantum key distribution (DI-QKD) offers the strongest form of security against eavesdroppers bounded by the laws of quantum mechanics. However, a practical implementation is still pending due to the requirement of combinations of visibility and detection efficiency that are beyond those possible with current technology. This mismatch motivates the search for DI-QKD protocols that can close the gap between theoretical and practical security. In this work, we present two DI-QKD protocols whose security relies on Bell inequalities with more than two inputs and two outputs. We show that, for maximally entangled states and perfect visibility, a protocol based on a Bell inequality with three inputs and four outputs requires a slightly lower detection efficiency than the protocols based on Bell inequalities with two inputs and two outputs.
description: 8 pages, 4 figures
Circular Law Theorem for Random Markov Matrices
Creators: name: Bordenave, Charles
name: Caputo, Pietro
name: Chafai, Djalil
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: Consider an nxn random matrix X with i.i.d. nonnegative entries with bounded density, mean m, and finite positive variance sigma^2. Let M be the nxn random Markov matrix with i.i.d. rows obtained from X by dividing each row of X by its sum. In particular, when X11 follows an exponential law, then M belongs to the Dirichlet Markov Ensemble of random stochastic matrices. Our main result states that with probability one, the counting probability measure of the complex spectrum of n^(1/2)M converges weakly as n tends to infinity to the uniform law on the centered disk of radius sigma/m. The bounded density assumption is purely technical and comes from the way we control the operator norm of the resolvent.
description: technical update via http://HAL.archives-ouvertes.fr
Vibrational energy transfer in ultracold molecule - molecule collisions
Creators: name: Quéméner, Goulven
name: Balakrishnan, Naduvalath
name: Krems, Roman V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a rigorous study of vibrational relaxation in p-H2 + p-H2 collisions at cold and ultracold temperatures and identify an efficient mechanism of ro-vibrational energy transfer. If the colliding molecules are in different rotational and vibrational levels, the internal energy may be transferred between the molecules through an extremely state-selective process involving simultaneous conservation of internal energy and total rotational angular momentum. The same transition in collisions of distinguishable molecules corresponds to the rotational energy transfer from one vibrational state of the colliding molecules to another.
description: 4 pages, 4 figures
Geometric theory of non-regular separation of variables and the bi-Helmholtz equation
Creators: name: Chanu, Claudia M
name: Jayyusi, Basel
name: McLenaghan, Raymond G
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The geometric theory of additive separation of variables is applied to the search for multiplicative separated solutions of the bi-Helmholtz equation. It is shown that the equation does not admit regular separation in any coordinate system in any pseudo-Riemannian space. The equation is studied in the four coordinate systems in the Euclidean plane where the Helmholtz equation and hence the bi-Helmholtz equation is separable. It is shown that the bi-Helmoltz equation admits non-trivial non-regular separation in both Cartesian and polar coordinates, while it possesses only trivial separability in parabolic and elliptic-hyperbolic coordinates. The results are applied to the study of small vibrations of a thin solid circular plate of uniform density which is governed by the bi-Helmholtz equation.
description: 25 pages
Gas composition and temperature within a spouted bed gasifier
Creators: name: Haji Sulaiman, Mohd Zaki
Publisher: name: University of British Columbia
Year: 2010

description: Internal gas composition and temperature profiles have been measured in a spouted bed coal gasifier. These, data are essential to develop a mathematical model that can be used for scale-up of the system. As a first step'towards developing a kinetic model, the treatment of Yoshida and Kunii for the fluidized bed gasifier has been adapted to the spouted- bed using the one-dimensional and the streamtube gas flow models. Two Western Canadian bituminous and sub-bituminous coals having particle size -3.36 + 1.19 mm were gasified to produce low and medium calorific value gas. The effect of different operating variables including total bed height, average bed temperature and char recycling on the internal gas composition profiles were investigated. In a typical run eighteen gas samples were collected from different levels and radial positions in the bed. In addition the average axial temperature profiles along different sections were also recorded. Both radial and axial gas composition profiles exist in a spouted bed coal gasifier. The combustion reaction takes place in a very narrow zone close to the gas inlet in the annulus and in the lower section of the spout. The temperature variation in the spout was large, and the upper section of the spout was found to be the hottest region in the bed. A hydrogen/carbon monoxide ratio of about unity has been observed throughout the bed for the system producing low calorific value gas. In this case the contribution from pyrolysis and volatile reforming reactions on the gas composition profiles appears to be significant, especially in the upper section of the bed. Gasifying char instead of coal altered the carbon monoxide and hydrogen distribution in the bed. Less hydrogen was produced. This pattern was however reversed when oxygen rather than air was used to gasify coal and was partly because of the high steam/oxygen ratio. Both the one-dimensional and the streamtube models gave relatively similar predictions of the average gas composition profiles and the overall gas composition based on kinetic expressions from the literature. However the predictions could not be matched with the experimental results. In modelling, the particle movement in the bed should be described. Pyrolysis should not be assumed instantaneous but its kinetics should be included. The streamtube model was superior to the one-dimensional model since it was able to predict radial composition profiles throughout the annulus. These profiles however were much steeper than those found in the experiments.
Beyond Twisted Tori
Creators: name: Villadoro, Giovanni
name: Zwirner, Fabio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Exploiting the fact that Kaluza-Klein monopoles and the associated generalized orbifold planes are sources for geometrical fluxes, omega, we show that the standard constraint omega.omega=0, valid for superstring compactifications on twisted tori, can be consistently relaxed. This leads to novel possibilities for constructing superstring models with fluxes and localized sources, as well as for stabilizing moduli. This also explains the ten-dimensional origin of a family of N=4 gauged supergravities, whose interpretation in type-IIA orientifold compactifications was lacking.
description: 12 pages
Pubchem NCBI
Creators: name: Sadeghi, Mohammad Mehdi
Publisher: name: Zenodo
Year: 2021
Subjects: ncbi
pubchem
biology

description: this is my presentation about pubchem
description: if you want some help text to me : mohammadmehdisadeghi7899@gmail.com
description: {"references": ["https://pubchem.ncbi.nlm.nih.gov/"]}
Sedimentation effects on particle position and inertial deposition in 90° circular bends
Creators: name: Vahaji, Sara
name: Nguyen, Ngoc-Hien
name: Shang, Yidan
name: Inthavong, Kiao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Laminar fluid-particle flows in bend geometries are present in many industrial, pharmaceutical, and biomedical applications. Particle deposition has been studied extensively; however, little attention has been paid to the effect of particle sedimentation on particle position and deposition in different pipe geometry combinations. This study presented a comprehensive analysis of sedimentation effects on particle flow behaviour in 90° circular pipe bends of micron particles in laminar pipe flows. Pipe geometry combinations consisted of eight pipe diameters, nine bend radii, and 30 particle diameters in a range of 1 to 100 μm. The results demonstrated the locations of particles that sedimented to the bottom half of the straight pipe section, and the particle positions upstream from the pipe bend entrance, which was no longer in a fully developed profile. These new locations represent the effects of gravity, pulling the particles down. While obtaining these positions can be found through CFD analysis, we proposed an analytical solution to predict the particle trajectory from different release locations that would help to identify the initial particle distribution at locations upstream to the bend, to obviate the need for long upstream straight pipe sections in the CFD analysis.
description: In-Press
Gender Disparity in Research Output at Dublin City University
Creators: name: Mohammad, Hosseini
name: Cousinie, Marion
Publisher: name: Zenodo
Year: 2019
Subjects: Authorship
Scientific Authorship
Gender
Gender Disparity

description: This poster presents the intermediate results of a qualitative study aimed to explore factors that affect the disparity in the research output of male and female researchers at Dublin City University.
Localization and the Anomalous Hall Effect in a "Dirty" Metallic Ferromagnet
Creators: name: Mitra, P.
name: Kumar, N.
name: Samarth, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report magnetoresistance measurements over an extensive temperature range (0.1 K $\leq T \leq$ 100 K) in a disordered ferromagnetic semiconductor (\gma). The study focuses on a series of metallic \gma~ epilayers that lie in the vicinity of the metal-insulator transition ($k_F l_e\sim 1$). At low temperatures ($T < 4$ K), we first confirm the results of earlier studies that the longitudinal conductivity shows a $T^{1/3}$ dependence, consistent with quantum corrections from carrier localization in a ``dirty'' metal. In addition, we find that the anomalous Hall conductivity exhibits universal behavior in this temperature range, with no pronounced quantum corrections. We argue that observed scaling relationship between the low temperature longitudinal and transverse resistivity, taken in conjunction with the absence of quantum corrections to the anomalous Hall conductivity, is consistent with the side-jump mechanism for the anomalous Hall effect. In contrast, at high temperatures ($T \gtrsim 4$ K), neither the longitudinal nor the anomalous Hall conductivity exhibit universal behavior, indicating the dominance of inelastic scattering contributions down to liquid helium temperatures.
description: Revised version of original submission. To appear in Phys. Rev. B
title: Wâhkôhtowin: Gestures in Kinship, Reciprocity, Rematriation Towards Healing the Land and Ourselves
Creators: name: Felsing, Lara
Publisher: name: Emily Carr University of Art and Design
Year: 2023
Subjects: subject: Multimedia (Art)
subject: Sustainability

description: My thesis focuses on creating artwork to benefit the land and more than-human species where I live and beyond. I aim to bring awareness to the needs of the land and all living beings with whom we share Mother Earth. My practice advocates living in unison with all our relations, and my research combines traditional Indigenous teachings and Western knowledge to explore the benefit to all life on Earth when we live thoughtfully and harmoniously with all living things.
Correlated many-body noise and emergent $1/f$ behavior in an anharmonic fluctuator model
Creators: name: Lloyd, P N Thomas
name: Walther, Valentin
name: Sadeghpour, Hossein
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Fluctuating electric fields emanating from surfaces are a primary source of decoherence in trapped ion qubits. Here, we show that superradiant phonon-induced excitation exchange between adatoms can lead to a reduction of electric field noise at low temperatures. We derive an exact mapping between the noise spectrum of $N$ fluctuators with $M$ vibrational levels to $N+M-1 \choose N$-1 two-level dipoles. We provide conditions for which the ubiquitous $1/f$ noise can emerge, even though the system is composed of only a single type of fluctuator, thus suggesting a new mechanism for the phenomenon.