cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An investigation of learning stations for elementary art
Creators: name: Sunday, Barbara-Ann
Publisher: name: University of British Columbia
Year: 2010

description: This study identifies the current need for instructional alternatives with particular reference to the use of learning stations. While a variety of literature is available regarding the use of learning stations in several curricular areas, there seems to be little reference to the development of learning stations for art. Learning stations which have been used with success in other curricular areas are analyzed with a view to discovering design aspects relevant for the development of learning stations for art. The functions and formats of good learning stations which seem to be suitable for art are identified according to specified criteria. The production and piloting of art stations took place in two phases over a four-year period. Twenty-eight art stations are selected to exemplify various approaches and are appended with some student results. During the first phase of the study, stations were piloted in two different classrooms under the supervision of the author. A general feasibility of art stations was established along with some observations of basic strengths and weaknesses which help to establish guidelines for further station development. Teachers within one school district were invited to pilot the stations in their classrooms in the second phase of the study. Findings resulting from a questionnaire circulated to teachers who took part in the last year of the study and the author's observations which were made throughout the study are discussed. Conclusions indicate that learning stations have potential to facilitate integrating art with language arts, social studies, and science. Conclusions also show that certain formats and activities seem more suitable for use in a station approach than others. Suggestions for further research are made in view of the findings of this study.
The cycle of scientific publication: an overview - 4EU+ training session
Creators: name: Galimberti, Paola
name: Jacq, Violaine
Publisher: name: Zenodo
Year: 2021
Subjects: Open Science
Open Access
Scientific publication

description: Presentation of the visio-conference training session of the 4EU+ european university alliance (https://4euplus.eu/4EU-273.html). This session, performed monday, november the 15th, from 12:30 to 14:00 pm. Here is the abstract of the session: You’re wondering what happens with a scientific publication between the time of writing and the formatted paper published in an academic journal? Preparing a manuscript or choosing a journal is a true headache for you ? This training session will give you an overview of the academic publication cycle and scholarly communication: journal choice, editorial process, peer-reviewing, acceptance of the article and contract signing.
On the axisymmetric thin disk model of flattened galaxies
Creators: name: Bratek, Łukasz
name: Jałocha, Joanna
name: Kutschera, Marek
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Non-monotonic features of rotation curves, and also the related gravitational effects typical of thin disks -- like backward-reaction or amplification of rotation by negative surface density gradients -- which are characteristic imprints of disk-like mass distributions, are discussed in the axisymmetric thin disk model. The influence of the data cutoff in rotational velocity measurements on the determination of the mass distribution in flattened galaxies is studied. It has also been found that the baryonic matter distribution in the spiral galaxy NGC 5475, obtained in the axisymmetric thin disk approximation, accounts for the rotation curve of the galaxy. To obtain these results, the iteration method developed recently by the authors has been applied.
description: Accepted for publication in MNRAS, 12 pages, 26 figures
Quantum fluctuations of baryon number density
Creators: name: Singh, Rajeev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum fluctuation expression of the baryon number for a subsystem consisting of hot relativistic spin-$\frac{1}{2}$ particles are derived. These fluctuations seems to diverge in the limit where system size goes to zero. For a broad range of thermodynamic parameters numerical solutions are obtained which might be helpful to interpret the heavy-ion experimental data.
description: 6 pages; Presented at HEP 2021 - 38th Conference on Recent Developments in High Energy Physics and Cosmology, 16-19 June 2021, Thessaloniki, Greece (online)
A Filtration of (q,t)-Catalan numbers
Creators: name: Bergeron, N.
name: Descouens, F.
name: Zabrocki, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We define new generalizations of (q,t)-Catalan numbers applying nabla operator on k-Schur functions indexed by column partitions. In some special cases, we give a combinatorial interpretation of these numbers using configurations of Dyck paths. In some other special cases, we also interpret these new polynomial as Hilbert series of explicit sub-modules of the alternating diagonal harmonics built using differential operators.
Oxus (Oxus) orientalis Walter 1915
Creators: name: Smit, Harry
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Oxidae
Oxus
Oxus orientalis

description: Oxus (Oxus) orientalis Walter, 1915
(Fig. 1)
Walter, 1915: 99; Cook 1986:47; Smit 1992: 95; Harvey 1998: 137; Smit 2002: 175.
 Description
Male: body 559–672 long. Excretory pore lying free in the integument, but some sort of incomplete sclerite visible (Fig. 1). Lengths of PI–PV: 38, 44, 40, 57, 20. Lengths of Ileg­4­6: 78, 124, 114. Lengths of IV­leg­5­6: 200, 194; seta at tip of IV­leg­6 80 long.
Female: body 753–1045 long. Lengths of PI–PV: 48, 54, 47, 64, 25. Lengths of I­leg­ 4­6: 102, 142, 118. IV­leg­6 206 long, seta at tip of this segment 62 long. Excretory pore as in male.
 Remarks
 The leg segments of this species vary considerably, specimens with the shortest segments are found in Vanuatu, the longest in Australia and those of New Caledonia are of intermediate length. The excretory pore of specimens from New Caledonia and Australia lack an incomplete sclerite. The specimens from Vanuatu agree well in all other aspects, and are therefore assigned to O. orientalis. The species has only been found in the aforementioned countries.
description: Published as part of Smit, Harry, 2004, Water mites from Pacific Islands (Acari: Hydrachnidia), pp. 1-20 in Zootaxa 588 on pages 3-4, DOI: 10.5281/zenodo.157984
Deeply Virtual Compton Scattering at HERA and perspectives at CERN
Creators: name: Schoeffel, Laurent
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Standard parton distribution functions contain neither information on the correlations between partons nor on their transverse motion, then a vital knowledge about the three dimensional structure of the nucleon is lost. Hard exclusive processes, in particular DVCS, are essential reactions to go beyond this standard picture. In the following, we examine the most recent data in view of the dipole model predictions and their implication on the quarks/gluons imaging (tomography) of the nucleon.
description: 8 pages, 6 figures, Proceedings of the Sixth International Conference on Perspectives in Hadronic Physics, 12 - 16 May 2008, Trieste, Italy
A time-variant norm constrained interpolation problem arising from relaxed commutant lifting
Creators: name: Frazho, A. E.
name: ter Horst, S.
name: Kaashoek, M. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A57 (Primary) 47A20, 30E05 (Secondary)

description: A time-variant analogue of an interpolation problem equivalent to the relaxed commutant lifting problem is introduced and studied. In a somewhat less general form the problem already appears in the analysis of the set of all solutions to the three chain completion problem. The interpolants are upper triangular operator matrices of which the columns induce contractive operators. The set of all solutions of the problem is described explicitly. The results presented are time-variant analogues of the main theorems in [A.E. Frazho, S. ter Horst, and M.A. Kaashoek, All solutions to the relaxed commutant lifting problem, Acta Sci. Math. (Szeged) 72 (2006), 299--318].
description: 25 pages
title: Social Mobility in Germany
Creators: name: Dodin, Majed
name: Findeisen, Sebastian
name: Henkel, Lukas
name: Sachs, Dominik
name: Schüle, Paul
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2021

description: We characterize intergenerational mobility in Germany using census data on educational attainment and parental income for 526,000 children. Our measure of educational attainment is the A-Level degree, a requirement for access to university. A 10 percentile increase in the parental income rank is associated with a 5.2 percentage point increase in the A-Level share. This parental income gradient has not changed for the birth cohorts of 1980-1996, despite a large-scale policy of expanding upper secondary education. At the regional level, there exists substantialvariation in mobility estimates. Place effects, rather than sorting of households, account for most of these differences
A general catalogue of extended objects in the Magellanic System
Creators: name: Bica, Eduardo
name: Bonatto, Charles
name: Dutra, Carlos
name: Santos, Joao F. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We update the SMC, Bridge, and LMC catalogues of extended objects that were constructed by members of our group from 1995 to 2000. In addition to the rich subsequent literature for the previous classes, we now also include HI shells and supershells. A total of 9305 objects were cross-identified, while our previous catalogues amounted to 7900 entries, an increase of $\approx12%$. We present the results in subcatalogues containing 1445 emission nebulae, 3740 star clusters, 3326 associations, and 794 HI shells and supershells. Angular and apparent size distributions of the extended objects are analysed. We conclude that the objects, in general, appear to respond to tidal effects arising from the LMC, SMC, and Bridge. Number-density profiles extracted along directions parallel and perpendicular to the LMC bar, can be described by two exponential-disks. A single exponential-disk fits the equivalent SMC profiles. Interestingly, when angular-averaged number-densities of most of the extended objects are considered, the profiles of both Clouds do not follow an exponential-disk. Rather, they are best described by a tidally-truncated, core/halo profile, despite the fact that the Clouds are clearly disturbed disks. On the other hand, the older star clusters taken isolately, distribute as an exponential disk. The present catalogue is an important tool for the unambiguous identification of previous objects in current CCD surveys and to establish new findings.
description: 15 pages, 10 figures, MNRAS, accepted
Functionalized Tellurene; a candidate large-gap 2D Topological Insulator
Creators: name: Sattigeri, Raghottam M.
name: Jha, Prafulla K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The discovery of group IV and V elemental Xene's which exhibit topologically non-trivial characters natively in their honeycomb lattice structure (HLS) has led to extensive efforts in realising analogous behaviour in group VI elemental monolayers. Although; it was theoretically concluded that group VI elemental monolayers cannot exist as HLS but recent experimental evidence suggests otherwise. In this letter we report that, HLS of group VI elemental monolayer (such as, Tellurene) can be realised to be dynamically stable when functionzalised with Oxygen. The functionalization leads to, peculiar orbital filtering effects (OFE) and broken spatial inversion symmetry which gives rise to the non-trivial topological character. The exotic quantum behaviour of this system is characterized by, spin-orbit coupling induced large-gap $\approx$ 0.36 eV with isolated Dirac cone along the edges indicating perspective room temperature spin-transport applications. Further investigations of spin Hall conductivity and the Berry curvatures unravel high conductivity as compared to previously explored Xene's. The non-trivial topological character is quantified in terms of the $\mathbb{Z}_2$ invaraint as $ν=$ 1 and Chern number $\mathit{C} =$ 1. Also, for practical purposes, we report that, \textit{h}BN/TeO/\textit{h}BN quantum-wells can be strain engineered to realize a sizable non-trivial gap ($\approx$ 0.11 eV). We finally conclude that, functionalization of group VI elemental monolayer with Oxygen gives rise to, exotic quantum properties which are robust against surface oxidation and degradations while providing viable electronic degrees of freedom for spintronic applications.
description: 13 pages, 5 figures, supplementary material included
Cluster Abell 520: a perspective based on member galaxies. A cluster forming at the crossing of three filaments?
Creators: name: Girardi, M.
name: Barrena, R.
name: Boschin, W.
name: Ellingson, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The connection of cluster mergers with the presence of extended, diffuse radio sources in galaxy clusters is still debated. An interesting case is the rich, merging cluster Abell 520, containing a radio halo. A recent gravitational analysis has shown in this cluster the presence of a massive dark core suggested to be a possible problem for the current cold dark matter paradigm. We aim to obtain new insights into the internal dynamics of Abell 520 analyzing velocities and positions of member galaxies. Our analysis is based on redshift data for 293 galaxies in the cluster field obtained combining new redshift data for 86 galaxies acquired at the TNG with data obtained by CNOC team and other few data from the literature. We also use new photometric data obtained at the INT telescope. We combine galaxy velocities and positions to select 167 cluster members around z~0.201. We analyze the cluster structure using the weighted gap analysis, the KMM method, the Dressler-Shectman statistics and the analysis of the velocity dispersion profiles. We compare our results with those from X-ray, radio and gravitational lensing analyses. We find that Abell 520 is definitely a very complex system. Our results suggest that we are looking at a cluster forming at the crossing of three filaments of the large scale structure. In particular, we detect a filament aligned with the LOS and projected onto the center of the forming cluster. It might explain the apparent massive dark core shown by gravitational lensing analysis.
description: 18 pages, 16 figures, 4 tables. Accepted for publication on A&A
title: Expectation Management of Policy Leaders: Evidence from COVID-19
Creators: name: Haan, Peter
name: Peichl, Andreas
name: Schrenker, Annekatrin
name: Weizsäcker, Georg
name: Winter, Joachim
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2021

description: This paper studies how the communication of political leaders affects the expectation formation of the public. Specifically, we examine the expectation management of theGerman government regarding COVID-19-related regulatory measures during the early phase of the pandemic. We elicit beliefs about the duration of these restrictions via a high-frequency survey of individuals, accompanied by an additional survey of firms. To quantify the success of policy communication, we use a regression discontinuity design and study how beliefs about the duration of the regulatory measures changed in response to three nationally televised press conferences by Chancellor Angela Merkel and the PrimeMinisters of the German federal states. We find that the announcements of Angela Merkel and her colleagues significantly prolonged the expected duration of restrictions, with effects being strongest for individuals with higher ex-ante optimism
title: Importance of the Webb, Pearman, and Leuning (WPL) correction for the measurement of small CO2 fluxes
Creators: name: Jentzsch, Katharina
name: Boike, Julia
name: Foken, Thomas
Publisher: name: University of Bayreuth
Year: 2021
Subjects: subject: WPL-correction
subject: CO2 flux
subject: open-path gas analyzer
subject: 500
subject: 530
subject: 550

description: The WPL (Webb, Pearman, and Leuning) correction is fully accepted to correct trace gas fluxes like CO2 for density fluctuations due to water vapour and temperature fluctuations for open-path gas analysers. It is known that this additive correction can be on the order of magnitude of the actual flux. However, this is hardly ever included in the analysis of data quality. An example from the Arctic shows the problems, because the size of the correction is a multiple of the actual flux. As a general result, we examined and tabulated the magnitude of the WPL correction for carbon dioxide flux as a function of sensible and latent heat flux. Furthermore, we propose a parameter to better estimate possible deficits in data quality and recommend integrating the quality flag derived with this parameter into the general study of small carbon dioxide fluxes.
title: Frequency stabilised laser diodes and their use in length metrology
Creators: name: Barwood, Geoffrey P.
Publisher: name: University of Kent
Year: 2021

description: This thesis is concerned with the use of indexed-guided GaA1As laser diodes in length metrology. Since these lasers have important differences from more commonly use HeNe lasers in interferometry, the thesis begins with a review and investigation of these differences. A key problem is the relatively large linewidth (typically 30 MHz). This is reduced, by using the optical feedback from a resonant confocal etalon, to less than -10kHz. Potential spectroscopic frequency references are discussed and the choice made of the rubidium (Rb) D lines at 780nm and 795 nm, using either Doppler-free features or the linear absorptions. The optically narrowed laser is then stabilised to the various hyperfine components. By measuring the reproducibility of the difference frequency between two systems, a relative frequency reproducibility of \(\approx\) 1x10\(^{-10}\) is demonstrated. Laser frequency stabilities are measured for a number of different cases, for example with the lasers free-running and offset locked. for two optically narrowed RB-stabilised laesrs at \(\tau\)=10 s, the relative frequency stability is \(\approx\) fx10\(^{-12}\). The hyperfine intervals of the two Rb lines are also measured for both isotopes (\(^{85}\)Rb and \(^{87}\)Rb), representing the most complete study of Rb-stabilised diode lasers to date. From these results, values for the hyperfine constants and isotope shifts are obtained. Finally, the absolute frequencies of both RB-stabilised laser diodes are measured by interferometric comparison with an iodine stabilised HeNe laser at 633 nm with a relative accuracy of \(\pm\) 1x10\(^{-9}\). To demonstrate the use of a frequency tunable laser diode in distance measurement, a swept wavelength measurement system was developed with a demonstrated accuracy of a few parts per million. The thesis ends with a discussion of longitudinal mode control in laser diodes and some potential future uses in length and optical frequency metrology.
The Harmonic Oscillator in Quantum Mechanics: A Third Way
Creators: name: Marsiglio, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Physics Education (physics.ed-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Courses on undergraduate quantum mechanics usually focus on solutions of the Schrödinger equation for several simple one-dimensional examples. When the notion of a Hilbert space is introduced only academic examples are used, such as the matrix representation of Dirac's raising and lowering operators or the angular momentum operators. We introduce some of the same one-dimensional examples as matrix diagonalization problems, with a basis that consists of the infinite set of square well eigenfunctions. Undergraduate students are well equipped to handle such problems in familiar contexts. We pay special attention to the one-dimensional harmonic oscillator. This paper should equip students to obtain the low lying bound states of any one-dimensional short range potential.
description: 7 pages, 5 figures, to be published in American Journal of Physics A lot of cosmetic changes were made to improve readability; 2 figures were omitted
Empirical mass-loss rates and clumping properties of Galactic early-type O supergiants
Creators: name: Hawcroft, C.
name: Sana, H.
name: Mahy, L.
name: Sundqvist, J. O.
name: Abdul-Masih, M.
name: Bouret, J. C.
name: Brands, S. A.
name: de Koter, A.
name: Driessen, F. A.
name: Puls, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the impact of optically thick clumping on stellar wind diagnostics in O supergiants and constrain wind parameters associated with porosity in velocity space. This is the first time the effects of optically thick clumping have been investigated for a sample of massive hot stars, using models including a full optically thick clumping description. We re-analyse spectroscopic observations of a sample of eight O supergiants. Using a genetic algorithm wrapper around the NLTE atmosphere code FASTWIND we obtain simultaneous fits to optical and UV spectra and determine photospheric and wind properties and surface abundances. We provide empirical constraints on a number of wind parameters including the clumping factors, mass-loss rates and terminal wind velocities. Additionally, we establish the first systematic empirical constraints on velocity filling factors and interclump densities. These parameters describe clump distribution in velocity-space and density of the interclump medium in physical-space, respectively. We observe a mass-loss rate reduction of a factor of 3.6 compared to theoretical predictions from Vink et al. (2000), and mass-loss rates within a factor 1.4 of predictions from Björklund et al. (2021). We confirm that including optically thick clumping allows simultaneous fitting of recombination lines and resonance lines, including the unsaturated UV phosphorus lines (Pv 1118-1128), without reducing the phosphorus abundance. We find that, on average, half of the wind velocity field is covered by dense clumps. We also find that these clumps are 25 times denser than the average wind, and that the interclump medium is 3-10 times less dense than the mean wind. The former result agrees well with theoretical predictions, the latter suggests that lateral filling-in of radially compressed gas might be critical for setting the scale of the rarefied interclump matter.
description: Accepted for publication in A&A; 35 pages, 20 figures
Holographic Nuclei
Creators: name: Hashimoto, Koji
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We provide a dual gravity description of heavy atomic nuclei, via AdS/CFT correspondence. In holographic QCD such as Sakai-Sugimoto model, baryons are D-branes wrapping a sphere in 10 dimensional curved spacetime, so any nucleus is a collection of $A$ such D-branes where $A$ is mass number of the nucleus. Quantum theory on the nucleus is ADHM-like U(A) Yang-Mills-Higgs theory on the sphere. Taking a large $A$ limit (corresponding to heavy nuclei) leads to a dual gravity describing collective excitataions of constituent nucleons of the heavy nucleus. This dual gravity computes spectra of the heavy nucleus, and gives discrete states whose gap roughly agrees with experimental nuclear data.
description: 13 pages, 2 figures; v3:reference added, minor corrections
title: Yoga 2.0 no Feminino
Creators: name: Hayes, Paulo
Publisher: name: Revista Lusófona de Ciência das Religiões
Year: 2019
Subjects: yoga
feminismo
espiritualidade
empoderamento da mulher

description: O estudo em perspetiva propõe subsídios que evidenciam a relação das práticas do yoga moderno com o desenvolvimento integral da mulher. As representações do yoga na modernidade, evidentes nas capas das revistas e nas redes sociais, são maioritariamente encabeçadas por mulheres de raça branca, flexíveis, da classe média-alta e com instrução superior. Tópicos sobre o feminismo, o corpo na sua relação com o sagrado e as práticas adotadas nos círculos de mulheres, incluindo técnicas de yoga, são referidos neste estudo. Acreditamos que o yoga pode contribuir para o empoderamento feminino, nomeadamente através dos benefícios que as práticas proporcionam ao corpo e mente. As entrevistas realizadas a feministas e praticantes de yoga, do mundo Lusófono, bem como a opinião de várias académicas e feministas do mundo Anglófono, reforçam a ideia do potencial do yoga como importante ferramenta na sustentação do movimento feminista. Palavras-chave: yoga, feminismo, espiritualidade, empoderamento da mulher
description: Revista Lusófona de Ciência das Religiões, v. 21 n. 1 (2018): Revista Lusófona de Ciência das Religiões
DISKRET MATEMATIKA VA MATEMATIK MANTIQ TARIXI VA UNING ASOSLARI.TARIXIY MAʼLUMOTLAR
Creators: name: Rahmatullayeva, Maxfuza
name: Zahiriddinova, Shahlo
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada diskret matematika va matematik mantiqning kelib chiqishi, rivojlanish tarixi hamda uning asosiy tamoyillari yoritiladi. Diskret matematika raqamli texnologiyalar, algoritmlar va dasturlashning nazariy asosi bo‘lib, uning ildizlari qadimgi matematika va mantiqiy tafakkurga borib taqaladi. Shuningdek, maqolada Aristotel, Evklid, Jorj Bul, Gotlob Frege, Alan Turing kabi olimlarning mantiq va matematikaga qo‘shgan hissasi ko‘rib chiqiladi. Matematik mantiq va diskret tuzilmalar bugungi zamonaviy hisoblash tizimlarining ajralmas qismi bo‘lib, ularning rivojlanishi sun’iy intellekt, axborot xavfsizligi va dasturiy ta’minot sohalariga sezilarli ta’sir ko‘rsatmoqda. Maqolada ushbu sohaning amaliy ahamiyati, uning hozirgi kundagi tadqiqot yo‘nalishlari va kelajakdagi istiqbollari ham tahlil qilinadi.
Nonrotating black hole in a post-Newtonian tidal environment
Creators: name: Taylor, Stephanne
name: Poisson, Eric
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We examine the motion and tidal dynamics of a nonrotating black hole placed within a post-Newtonian external spacetime. The tidal perturbation created by the external environment is treated as a small perturbation. At a large distance from the black hole, the gravitational field of the external distribution of matter is assumed to be sufficiently weak to be adequately described by the (first) post-Newtonian approximation to general relativity. There, the black hole is treated as a monopole contribution to the total gravitational field. There exists an overlap in the domains of validity of each description, and the black-hole and post-Newtonian metrics are matched in the overlap. The matching procedure produces the equations of motion for the black hole and the gravito-electric and gravito-magnetic tidal fields acting on the black hole. We first calculate the equations of motion and tidal fields by making no assumptions regarding the nature of the post-Newtonian environment; this could contain a continuous distribution of matter or any number of condensed bodies. We next specialize our discussion to a situation in which the black hole is a member of a post-Newtonian two-body system. As an application of our results, we examine the geometry of the deformed event horizon and calculate the tidal heating of the black hole, the rate at which it acquires mass as a result of its tidal interaction with the companion body.
description: 27 pages, 1 figure
Stratorotational instability in Taylor-Couette flow heated from above
Creators: name: Gellert, M.
name: Rüdiger, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate the instability and nonlinear saturation of temperature-stratified Taylor-Couette flows in a finite height cylindrical gap and calculate angular-momentum transport in the nonlinear regime. The model is based on an incompressible fluid in Boussinesq approximation with a positive axial temperature gradient applied. While both ingredients itself, the differential rotation as well as the stratification due to the temperature gradient, are stable, together the system becomes subject of the stratorotational instability and nonaxisymmetric flow pattern evolve. This flow configuration transports angular momentum outwards and will therefor be relevant for astrophysical applications. The belonging viscosity $α$ coefficient is of the order of unity if the results are adapted to the size of an accretion disc. The strength of the stratification, the fluids Prandtl number and the boundary conditions applied in the simulations are well-suited too for a laboratory experiment using water and a small temperature gradient below five Kelvin. With such a rather easy realizable set-up the SRI and its angular momentum transport could be measured in an experiment.
description: 10 pages, 6 figures, revised version appeared in J. Fluid Mech. (2009), vol. 623, pp. 375--385
What and How long: Prediction of Mobile App Engagement
Creators: name: Tian, Yuan
name: Zhou, Ke
name: Pelleg, Dan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: User engagement is crucial to the long-term success of a mobile app. Several metrics, such as dwell time, have been used for measuring user engagement. However, how to effectively predict user engagement in the context of mobile apps is still an open research question. For example, do the mobile usage contexts (e.g.,~time of day) in which users access mobile apps impact their dwell time? Answers to such questions could help mobile operating system and publishers to optimize advertising and service placement. In this paper, we first conduct an empirical study for assessing how user characteristics, temporal features, and the short/long-term contexts contribute to gains in predicting users' app dwell time on the population level. The comprehensive analysis is conducted on large app usage logs collected through a mobile advertising company. The dataset covers more than 12K anonymous users and 1.3 million log events. Based on the analysis, we further investigate a novel mobile app engagement prediction problem -- can we predict simultaneously what app the user will use next and how long he/she will stay on that app? We propose several strategies for this joint prediction problem and demonstrate that our model can improve the performance significantly when compared with the state-of-the-art baselines. Our work can help mobile system developers in designing a better and more engagement-aware mobile app user experience.
description: 38 pages, to appear in ACM Transactions on Information Systems 2021
The Prairie legislative buildings of Canada
Creators: name: Bodnar, Diana Lynn
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is a study of the three legislative buildings in the Canadian Prairie provinces of Alberta, Saskatchewan, and Manitoba. It documents the history of each building, describes the architectural features, and establishes the stylistic prototypes and influences. It further examines the place of these buildings as a group in the North American and European architectural environment of the period 1880 - 1920. The thesis will show how the formation of the provinces of Alberta and Saskatchewan in 19051 and the expansion of the province of Manitoba in 1912, necessitated the construction of legislative buildings to accommodate governmental functions. The significance of such practical, as well as other symbolical, needs on the design and style of each building is examined. Individual factors surrounding each building such as the use of local materials, the nationality and training of the architects, and economic limitations are considered. The thesis will conclude that while the three buildings show a similar architectural style - the Beaux-Arts Style - local influences have combined to produce a more specifically Canadian version, one which is less ornate, less complex, and smaller in scale.
Enhancing Cybersecurity in the Pharmaceutical Industry with Multi-Factor Authentication -JSON Web Token (MFA-JWT)
Creators: name: Mr.Satyanarayana Botsa, Mr.VasudevaRao Addala
Publisher: name: Zenodo
Year: 2025

description: In the present day, critical and sensitive information needs to be protected. It has become paramount in the rapidly evolving pharmaceutical industry. This project explains the essentials of proposing and implementing the novel cybersecurity framework using MFA-JWT (Multi-Factor Authentication - JSON Web Token). By deploying this advanced authentication method, the project aims to fortify the security posture of pharmaceutical organizations, mitigating the risks associated with cyber-attacks, unauthorized access, and data breaches. Developing MFA introduces an extra layer of security beyond single-factor authentication systems; it gradually decreases unauthorized access and data breaches. This project helps cutting-edge technologies to seamlessly integrate biometric data and one-time passwords, providing a multi-factor authentication system that improves user identity verification. The aim of this project to develop a novel approach to MFA in significantly decreasing unauthorized access and data breaches within the pharmaceutical industry.
Isoperimetry and Symmetrization for Sobolev spaces on metric spaces
Creators: name: Martin, Joaquim
name: Milman, Mario
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Using isoperimetry we obtain new symmetrization inequalities that allow us to provide a unified framework to study Sobolev inequalities in metric spaces. The applications include concentration inequalities, as well as metric versions of the Pó% lya-Szegö and Faber-Krahn principles.
description: corrected version
title: Optimal Non-Linear Pricing with Data-Sensitive Consumers
Creators: name: Strausz, Roland
name: Krähmer, Daniel
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2021

description: We introduce consumers with intrinsic privacy preferences into the monopolistic non-linear pricing model. Next to classical consumers, there is a share of data-sensitive consumers who incur a privacy cost if their purchase reveals information to the monopolist. The monopolist discriminates between privacy types using privacy mechanisms which consist of a direct mechanism and a privacy option, targeting, respectively, classical and data-sensitive consumers. We show that a privacy mechanism is optimal if privacy costs are large and that it yields classical consumers a higher utility than data-sensitive consumers with the same valuation. If, by contrast, privacy preferences are public information, data-sensitive consumers with a low valuation obtain a strictly higher utility than classical consumers. With public privacy preferences, data-sensitive consumers and the monopolist are better off, whereas classical consumers are worse off. Our results are relevant for policy measures that target the data-awareness of consumers, such as the European GDPR.
Learning from scarce information: using synthetic data to classify Roman fine ware pottery
Creators: name: Jareño, Santos J. Núñez
name: van Helden, Daniël P.
name: Mirkes, Evgeny M.
name: Tyukin, Ivan Y.
name: Allison, Penelope M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: 68T07, 68T45

description: In this article we consider a version of the challenging problem of learning from datasets whose size is too limited to allow generalisation beyond the training set. To address the challenge we propose to use a transfer learning approach whereby the model is first trained on a synthetic dataset replicating features of the original objects. In this study the objects were smartphone photographs of near-complete Roman terra sigillata pottery vessels from the collection of the Museum of London. Taking the replicated features from published profile drawings of pottery forms allowed the integration of expert knowledge into the process through our synthetic data generator. After this first initial training the model was fine-tuned with data from photographs of real vessels. We show, through exhaustive experiments across several popular deep learning architectures, different test priors, and considering the impact of the photograph viewpoint and excessive damage to the vessels, that the proposed hybrid approach enables the creation of classifiers with appropriate generalisation performance. This performance is significantly better than that of classifiers trained exclusively on the original data which shows the promise of the approach to alleviate the fundamental issue of learning from small datasets.
Spherically-symmetric Accretion onto a Black Hole at the Center of a Young Stellar Cluster
Creators: name: Silich, Sergiy
name: Tenorio-Tagle, Guillermo
name: Hueyotl-Zahuantitla, Filiberto
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a self-consistent, bimodal stationary solution for spherically symmetric flows driven by young massive stellar clusters with a central supermassive black hole. We demonstrate that the hydrodynamic regime of the flow depends on the location of the cluster in the 3D (star cluster mechanical luminosity - BH mass - star cluster radius) parameter space. We show that a threshold mechanical luminosity (L_crit) separates clusters which evolve in the BH dominated regime frome those whose internal structure is strongly affected by the radiative cooling. In the first case(below the threshold energy) gravity of the BH separates the flow into two distinct zones: the inner accretion zone and the outer zone where the star cluster wind is formed. In the second case (above the critical luminosity), catastrophic cooling sets in inside the cluster. In this case the injected plasma becomes thermally unstable that inhibits a complete stationary solution. We compared the calculated accretion rates and the BH luminosities with those predicted by the classic Bondi accretion theory and found that Bondi's theory is in good agreement with our results in the case of low mass clusters. However, it substantially underestimates the accretion rates and BH luminosities if the star cluster mechanical luminosity, L_sc, approaches the threshold value (L_sc > 0.1 L_crit).
description: 23 pages, 9 figures, accepted for publication in the Astrophysical Journal
Gravitational Uncertainty and Black Hole Remnants
Creators: name: Nozari, Kourosh
name: Mehdipour, S. Hamid
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Possible existence of black holes remnants provides a suitable candidates for dark matter. In this paper we study the possibility of existence for such remnants. We consider quantum gravitational induced corrections of black hole's entropy and temperature to investigate the possibility of such relics. Observational scheme for detection of these remnants and their cosmological constraints are discussed.
description: 17 pages, 6 figures
Revitalising brassware handicrafts in Terengganu, Malaysia through sustainable design
Creators: name: Bin Mohamad, Sharih
Publisher: name: Lancaster University
Year: 2021

description: The state of Terengganu has been long recognised as Malaysia’s national capital of brassware handicrafts. Here, traditional knowledge and wisdom are made manifest by skilled artisans who use local materials to create culturally distinctive products. These products and practices have strong historical connections to the people of the region, to the notion of place and to the sense of community. However, in recent decades, this handicraft industry, like many others around the world, has been in decline. The effects of globalisation and modernisation have affected the viability of craft practices as well as the way local societies perceive and value craft products. The research consisted of extensive qualitative studies that included semi-structured interviews involving 37 informants and followed by exploratory case studies comprising direct observation, photographic documentation and document analysis that were carried out through investigation of the brassware craft sector and its associated practices in Kuala Terengganu region. This research set out to determine the value of significance of brassware handicraft and to identify design opportunities in order to develop design-oriented strategies to revitalise culturally significant design, products and practices of brassware handicraft in Terengganu, Malaysia. This research looks at how can brassware handicraft, as a culturally significant craft practice, be revitalised in Malaysia through effective design contribution that is in accord with principles of sustainability. Findings suggest that collaborative design practice involving various organisations in the community is needed to better convey and promote the value of the cultural, philosophical, historical significance of these crafts and their relationship to place, culture, community and identity. In doing so, collaborative design has the potential to stimulate a greater appreciation and sense of belonging towards Malaysia’s traditional material culture and potentially raise the profile, and prospects for these important craft practices.
Droplet evaporation in one-component fluids: Dynamic van der Waals theory
Creators: name: Teshigawara, Ryohei
name: Onuki, Akira
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In a one-component fluid, we investigate evaporation of a small axysymmetric liquid droplet in the partial wetting condition on a heated wall at $T\sim 0.9 T_c$. In the dynamic van der Waals theory (Phys. Rev. E {\bf 75}, 036304 (2007)), we take into account the latent heat transport from liquid to gas upon evaporation. Along the gas-liquid interface, the temperature is nearly equal to the equilibrium coexisting temperature away from the substrate, but it rises sharply to the wall temperature close to the substrate. On an isothermal substrate, evaporation takes place mostly on a narrow interface region near the contact line in a late stage, which is a characteristic feature in one-component fluids.
description: 6 pages, 6 figures
Influence of synthesis approach on controlled microstructures and photocatalytic properties of Ag/AgBra-activated carbon composites on visible light degradation of tetracycline
Creators: name: Brink, Hendrik
name: Sanni, Saheed
name: Viljoen, Elvera
Publisher: name: University of Pretoria
Year: 2021
Subjects: subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering
subject: 90799 Environmental Engineering not elsewhere classified
subject: FOS: Environmental engineering

description: Dataset for Influence of Synthesis Approach on Controlled Microstructures and Photocatalytic Properties of Ag/AgBr-Activated Carbon Composites on Visible Light Degradation of Tetracycline published in Catalysts
Directional verbs in English and Japanese
Creators: name: Suzuki, Yoshiko
Publisher: name: University of British Columbia
Year: 2010

description: The English, directional verbs come and go basically correspond to Japanese kuru and iku. Therefore, the behaviours of come and go are similar to those of kuru and iku respectively. However, there also exist some differences between them. The various similarities and differences in simplex and complex sentences are investigated in this thesis. Pragmatics of directional verbs varies according to the structure. The discussion is based on how the deictic point is involved in these verbs. The deictic point is usually at the speaker; however, the possibilities for viewpoint shift toward the hearer or a third person are very different for English and Japanese directional verbs. Next, systematic generalizations on the occurrences of directional verbs in English and Japanese which have been proposed by Oye are introduced. These generalizations are based on viewpoint --- the significant question is, "In a complex sentence from the viewpoint of which noun phrase is the motion observed?" However, since it is sometimes difficult to determine which noun phrase is significant when viewpoint shift is involved, a performative analysis is suggested as a more useful device. This analysis makes clear the conditions under which the motion is expressed by come, go, kuru or iku.
Syzygies of the secant variety of a curve
Creators: name: Sidman, Jessica
name: Vermeire, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13D02, 14F05, 14H99, 14N05

description: We show that the secant variety of a linearly normal smooth curve of degree at least 2g+3 is arithmetically Cohen-Macaulay, and we use this information to study the graded Betti numbers of the secant variety.
description: 24 pages; minor revision and reorganization
GEOMETIYA FANIDAN AMALIY MASHGʻULOTLARDA TALABALAR MAKTABDA, AKADEMIK LITSEY VA KASB HUNAR KOLLEJLARDA OʻRGANILMAGAN MAVZULARINI CHUQURROQ VA TADBIQIY MASALALARNING OʻQITILISHI TAVSIYA ETILADI
Creators: name: Zaxriddinova, Shaxlo
name: Toʻrayeva, Charos
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqolada geometriya fanidan talabalar bilimini chuqurlashtirish va ularning nazariy bilimlarini amaliy tadbiqiy masalalar orqali mustahkamlashga qaratilgan. Maktab, akademik litsey va kasb-hunar kollejlarida yetarlicha o‘rganilmagan mavzular, jumladan, fazoviy geometriya, trigonometriya, vektorlar geometriyasi hamda muhandislik geometriyasi chuqur tahlil qilinadi. Talabalar real hayotdagi muammolarni yechishda geometrik qonuniyatlardan foydalanishni o‘rganadilar hamda loyihalash, dizayn va texnologik jarayonlarda geometriyaning ahamiyatini anglab yetadilar. Ushbu amaliy mashgʻulotlar orqali talabalarning ijodiy fikrlashi, mantiqiy tahlil qilish ko‘nikmalari va muammolarni yechish qobiliyatlari rivojlanadi.
title: Front Matter, Table of Contents, Preface, External Reviewers
Creators: name: Okamoto, Yoshio
name: Tokuyama, Takeshi
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2017
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: External Reviewers

description: Front Matter, Table of Contents, Preface, External Reviewers
description: LIPIcs, Vol. 92, 28th International Symposium on Algorithms and Computation (ISAAC 2017), pages 0:i-0:xvi