cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
White dwarfs in the Capodimonte deep field
Creators: name: Silvotti, R.
name: Catalan, S.
name: Cignoni, M.
name: Alcala', J. M.
name: Capaccioli, M.
name: Grado, A.
name: Pannella, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this article we describe the search for white dwarfs (WDs) in the multi-band photometric data of the Capodimonte deep field survey. The WD candidates were selected through the V-R_C vs B-V color-color diagram. For two bright objects, the WD nature has been confirmed spectroscopically, and the atmospheric parameters (Teff and logg) have been determined. We have computed synthetic stellar population models for the observed field and the expected number of white dwarfs agrees with the observations. The possible contamination by turn-off and horizontal branch halo stars has been estimated. The quasar (QSO) contamination has been determined by comparing the number of WD candidates in different color bins with state-of-the-art models and previous observations. The WD space density is measured at different distances from the Sun. The total contamination (non-degenerate stars + QSOs) in our sample is estimated to be around 30%. This work should be considered a small experiment in view of more ambitious projects to be performed in the coming years in larger survey contexts.
description: 9 pages, accepted for publication in Astronomy and Astrophysics (21/11/2008)
Lesson Plan - Social Media: Advantages and Challenges
Creators: name: Fox, Bianca
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified
classificationCode: 390306
subject: Secondary education
classificationCode: 390307
subject: Teacher education and professional development of educators

description: Ready to use and easy to adapt lesson plan on the advantages and challages of using social media. 

The lesson plan contains a few ideas on how to discuss this topic with students and support them to reflect on their daily social media use.  

For access to other useful resources, please check out the MeLDE platform http://melde.iit.demokritos.gr and MeLDE website http://meldeproject.eu
Identifying Blue Large Amplitude Pulsators from Gaia DR2 & ZTF DR3
Creators: name: McWhirter, Paul Ross
name: Lam, Marco C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Blue Large Amplitude Pulsators (BLAPs) are hot, subluminous stars undergoing rapid variability with periods of under 60 mins. They have been linked with the early stages of pre-white dwarfs and hot subdwarfs. They are a rare class of variable star due to their evolutionary history within interacting binary systems and the short timescales relative to their lifetime in which they are pulsationally unstable. All currently known BLAPs are relatively faint (15-19 mag) and are located in the Galactic plane. These stars have intrinsically blue colours but the large interstellar extinction in the Galactic plane prevents them from swift identification using colour-based selection criteria. In this paper, we correct the Gaia $G$-band apparent magnitude and $G_{\mathrm{BP}}-G_{\mathrm{RP}}$ colours of 89.6 million sources brighter than 19 mag in the Galactic plane with good quality photometry combined with supplementary all-sky data totalling 162.3 million sources. Selecting sources with colours consistent with the known population of BLAPs and performing a cross-match with the Zwicky Transient Facility (ZTF) DR3, we identify 98 short period candidate variables. Manual inspection of the period-folded light curves reveals 22 candidate BLAPs. Of these targets, 6 are consistent with the observed periods and light curves of the known BLAPs, 10 are within the theoretical period range of BLAPs and 6 are candidate high-gravity BLAPs. We present follow-up spectra of 21 of these candidate sources and propose to classify 1 of them as a BLAP, and tentatively assign an additional 8 of them as BLAPs for future population studies.
description: 11 pages, 5 figures, 2 tables, accepted to MNRAS
The Global Rice Scenario Towards 2050: Results for Six Continents
Creators: name: Samal, Parshuram
name: Babu, Suresh Chandra
name: Mondal, Biswajit
name: Samal, Parshuram
name: Babu, Suresh Chandra
name: Mondal, Biswajit
Publisher: name: Unknown
Year: 2021
Subjects: Crop Production/Industries

description: Session ID 4824, Paper# 18693
Roles of Rural Non-Farm Employment (RNFE) in India: Why Rnfe, the Conveyor of a Shock like COVID 19 Is Also the Key to Recovery?
Creators: name: Boss, Ruchira
name: Saroj, Sunil
name: Pradhan, Mamata
name: Roy, Devesh
name: Boss, Ruchira
name: Saroj, Sunil
name: Pradhan, Mamata
name: Roy, Devesh
Publisher: name: Unknown
Year: 2021
Subjects: Health Economics and Policy
Labor and Human Capital

description: Session ID 4760, Paper# 18694
YETI follow-up observations of the T Tauri star CVSO30 with transit-like dips
Creators: name: Bischoff, R.
name: Raetz, St.
name: Fernández, M.
name: Mugrauer, M.
name: Neuhäuser, R.
name: Huang, P. C.
name: Chen, W. P.
name: Sota, A.
name: Ortega, J. Jiménez
name: Hambaryan, V. V.
name: Zieliński, P.
name: Dróżdż, M.
name: Ogłoza, W.
name: Stenglein, W.
name: Hohmann, E.
name: Michel, K. -U.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The T Tauri star CVSO30, also known as PTFO8-8695, was studied intensively with ground based telescopes as well as with satellites over the last decade. It showed a variable light curve with additional repeating planetary transit-like dips every ~0.8h. However, these dimming events changed in depth and duration since their discovery and from autumn 2018 on, they were not even present or near the predicted observing times. As reason for the detected dips and their changes within the complex light curve, e.g. a disintegrating planet, a circumstellar dust clump, stellar spots, possible multiplicity and orbiting clouds at a Keplerian co-rotating radius were discussed and are still under debate. In this paper, we present additional optical monitoring of CVSO30 with the meter class telescopes of the Young Exoplanet Transit Initiative in Asia and Europe over the last seven years and characterize CVSO30 with the new Early Data Release 3 of the ESA Gaia Mission. As a result, we describe the evolution of the dimming events in the optical wavelength range since 2014 and present explanatory approaches for the observed variabilities. We conclude that orbiting clouds of gas at a Keplerian co-rotating radius are the most promising scenario to explain most changes in CVSO30's light curve.
description: accepted for publication in MNRAS, 16 pages, 15 figures, 5 tables
Predicting window opening states in buildings using machine learning with real and synthetic datasets
Creators: name: Wong, Jeremy
Publisher: name: University of British Columbia
Year: 2024

description: As HVAC systems become more prevalent in densified residential buildings, natural ventilation and its benefits have been pushed out the window. These benefits, including energy reductions and air quality improvements, can be harnessed most effectively if building designers can estimate the natural ventilation rate. Since all ventilation models rely heavily on the window opening angle, some form of a sensor is necessary. Prior works have attempted this with traditional algorithms with limited success. Tangentially, a lot of effort has been invested in using machine learning to locate windows on facades. This work combines both of these realms, using photographic techniques and machine learning to not just locate windows but also predict their opening state. This thesis can be broken down into three main parts: the data collection, the preliminary machine learning approach, and the hybrid dataset machine learning approach. The results show the machine learning model can predict window opening state with over 90% accuracy; most windows perform similarly, with the exception of windows with a more head-on angle. Furthermore, using 3D modelling and photorealistic renders to supplement the real images of the dataset proves to be a promising avenue for continued work in this domain. The combination of real and synthetic images, which creates a hybrid dataset, improves model performance in some situations. Aside from these results, these datasets will be made public for others to approach the problem; this includes both the real and synthetic images. The publication of this dataset can facilitate further research into this topic; possible routes that can be taken are presented while also considering the implications and limitations of the research.
Helium Nuclei in Quenched Lattice QCD
Creators: name: Yamazaki, T.
name: Kuramashi, Y.
name: Ukawa, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present results for the binding energies for He and ^3He nuclei calculated in quenched lattice QCD at the lattice spacing of a = 0.128 fm with a heavy quark mass corresponding to m_pi = 0.8 GeV. Enormous computational cost for the nucleus correlation functions is reduced by avoiding redundancy of equivalent contractions stemming from permutation symmetry of protons or neutrons in the nucleus and various other symmetries. To distinguish a bound state from an attractive scattering state, we investigate the volume dependence of the energy difference between the nucleus and the free multi-nucleon states by changing the spatial extent of the lattice from 3.1 fm to 12.3 fm. A finite energy difference left in the infinite spatial volume limit leads to the conclusion that the measured ground states are bounded. It is also encouraging that the measured binding energies and the experimental ones show the same order of magnitude.
description: 4 pages, 3 figures
The Crowd Emotion Amplification Effect
Creators: name: Goldenberg, Amit
name: Gross, James
name: Weisz, Erika
name: Cikara, Mina
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: How do people go about reading a room or taking the temperature of a crowd? When people are briefly exposed to an array of faces, they can only sample a subset of them. We propose that perceivers preferentially attend to more emotional faces and that this generates a crowd emotion amplification effect—estimating a crowd’s average emotional response as more extreme than it is. Study 1 (N = 50) documents the crowd amplification effect. Study 2 (N = 50) replicates the effect even when we increase exposure time. Study 3 (N = 50) uses eye-tracking to show that attentional bias to emotional faces drives amplification. These findings have important implications for every domain in which individuals have to make snap judgments regarding a crowd’s emotionality, from public speaking to controlling crowds.
Achieving control of in-plane elastic waves
Creators: name: Brun, Michele
name: Guenneau, Sebastien
name: Movchan, Alexander B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We derive the elastic properties of a cylindrical cloak for in-plane coupled shear and pressure waves. The cloak is characterized by a rank 4 elasticity tensor with 16 spatially varying entries which are deduced from a geometric transform. Remarkably, the Navier equations retain their form under this transform, which is generally untrue [Milton et al., New J. Phys. 8, 248 (2006)]. We numerically check that clamped and freely vibrating obstacles located inside the neutral region are cloaked disrespectful of the frequency and the polarization of an incoming elastic wave.
description: 9 pages, 4 figures
Pay to (not) play : monetizing impatience in mobile games
Creators: name: Raman, Narun
Publisher: name: University of British Columbia
Year: 2024

description: Mobile gaming is a rapidly growing and incredibly profitable sector; having grown seven-fold over the past 10 years, it now grosses over $100 billion annually. This growth was due in large part to a shift in monetization strategies: rather than charging players an upfront cost ("pay-to-play"), games often request optional microtransactions throughout gameplay ("free-to-play"). We focus on a common scenario in which games include wait times---gating either items or game progression---that players can pay to skip. Game designers typically say that they optimize for player happiness rather than revenue; however, prices for skips are typically set at levels that few players are willing to pay, leading to low purchase rates. Under a traditional analysis, it would seem that game designers fail at their stated goal if few players buy what they are selling. We argue that an alternate model can better explain this dynamic: players value tasks more highly as they are perceived to be more difficult. While skips can increase players' utilities by providing instant gratification, pricing skips too cheaply can lower players' utilities by decreasing the perceived amount of work needed to complete a task. We show that high revenue, high player utility, and low purchase rates can all coexist under this model, particularly under a realistic distribution of players having few buyers but a few big-spending "whales." We also investigate how a game designer should optimize prices under our model.
A population of transition disks around evolved stars: Fingerprints of planets? Catalog of disks surrounding Galactic post-AGB binaries
Creators: name: Kluska, Jacques
name: Van Winckel, Hans
name: Coppée, Quentin
name: Oomen, Glenn-Michael
name: Kamath, Devika
name: Bujarrabal, Valentin
name: Min, Michiel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Post-asymptotic giant branch (post-AGB) binaries are surrounded by massive disks of gas and dust that are similar to protoplanetary disks around young stars. We assembled a catalog of all known Galactic post-AGB binaries with disks. We explore the correlations between the different observables with the aim of learning more about potential disk-binary interactions. We compiled spectral energy distributions of 85 Galactic post-AGB binary systems. We built a color-color diagram to differentiate between the different disk morphologies traced by the infrared excess. We categorized the different disk types and searched for correlations with other observational characteristics of these systems. Between 8 and 12% of our targets are surrounded by transition disks, that is, disks having no or low near-infrared excess. We find a strong link between these transition disks and the depletion of refractory elements on the surface of the post-AGB star. We interpret this link as evidence of a mechanism that stimulates the dust and gas separation within the disk and that also produces the transition disk structure. We propose that such a mechanism is likely to be due to a giant planet carving a hole in the disk, effectively trapping the dust in the outer disk parts. We propose disk evolutionary scenarios, depending on the presence of such a giant planet in the disk. We advocate that giant planets can successfully explain the link between the transition disks and the observed depletion of refractory materials. If the planetary scenario is confirmed, disks around post-AGB binaries could be a unique laboratory for testing planet-disk interactions and their influence on the late evolution of binary stars. The question of whether such planets are first- or second-generation bodies remains to be considered. We argue that these disks are ideal for studying planet formation in unprecedented parameter space.
description: Published in A&A. 27 pages, 25 figures
Resilience of agropastoral households affected by large scale land investments: The case of Ethiopia
Creators: name: Bekele, Adugna Eneyew
name: Dries, Liesbeth
name: Drabik, Dusan
name: Heijman, Wim
name: Bekele, Adugna Eneyew
name: Dries, Liesbeth
name: Drabik, Dusan
name: Heijman, Wim
Publisher: name: Unknown
Year: 2021
Subjects: Land Economics/Use
Consumer/Household Economics

description: Session ID 4768, Paper# 18696
Quenching Timescales in the IllustrisTNG Simulation
Creators: name: Walters, Dan
name: Woo, Joanna
name: Ellison, Sara L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The timescales for galaxy quenching offer clues to its underlying physical drivers. We investigate central galaxy quenching timescales in the IllustrisTNG 100-1 simulation, their evolution over time, and the pre-quenching properties of galaxies that predict their quenching timescales. Defining quenching duration $τ_q$ as the time between crossing sSFR thresholds, we find that $\sim$40% of galaxies quench rapidly with $τ_q$1 Gyr) were more massive, had more massive black holes, had larger stellar radii and accreted gas with higher specific angular momentum (AM) prior to quenching. These properties evolve little by $z=0$, except for the accreting gas AM for fast quenchers, which reaches the same high AM as the gas in slow quenchers. By $z=0$, slow quenchers also have residual star formation in extended gas rings. Using the expected relationship between stellar age gradient and $τ_q$ for inside-out quenching we find agreement with MaNGA IFU observations. Our results suggest the accreting gas AM and potential well depth determine the quenching timescale.
description: 18 pages, 18 figures, accepted for publication in MNRAS
Le "transazioni collettive": la discplina spagnola e quella francese.
Creators: name: Inchausti, Ferdinando Gascòn
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: Il saggio offre una descrizione rigorosa e completa della disciplina giuridica fornita al fenomeno della «transazioni collettive» da due dei principali e più importanti ordinamenti giuridici europei, quello spagnolo e quello francese. La trattazione si apre con alcune considerazioni generali finalizzate a chiarire la differenza tra diritti ed interessi sovra-individuali e pluri-individuali, nello svolgimento delle quali l’A., analizzando le azioni collettive da una prospettiva funzionale, le suddivide a seconda che il loro esercizio miri all’ottenimento di una tutela giurisdizionale di tipo astratto (a contenuto cessatorio o inibitorio) o più concreto (a contenuto risarcitorio o risolutorio). La parte centrale e più consistente dell’indagine è dedicata all’analisi del sistema spagnolo, la cui illustrazione ruota intorno ai tre nodi problematici assunti dall’A. come oggetti privilegiati dall’indagine, vale a dire: l’individuazione dei soggetti legittimati a condurre le trattative ed a stipulare transazioni che riguardano diritto o interessi controversi di carattere sovra o pluri-individuale; la determinazione delle condizioni che consentono a tali transazioni di vincolare i titolari dei diritti o degli interessi coinvolti nella controversia malgrado essi non abbiano partecipato alle relative trattative e non abbiano sottoscritto in nome proprio l’accordo; infine, l’analisi delle regioni che rendono opportuna o necessaria la previsione di limiti e di controlli a cui sottoporre il contenuto e l’efficacia degli accordi collettivi. La seconda parte del lavoro è costituita da una interessante panoramica sull’attuale assetto normativo che circonda il tema delle tutela collettiva dei consumatori nell’ordinamento francese, svolgendo la quale l’A. fornisce al lettore utili informazioni in ordine ad alcune recenti proposte legislative miranti a sviluppare l’impiego e l’effettività.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 4 (2008)
Accounting for exotic matter and the extreme radial tension in Morris-Thorne wormholes of embedding class one
Creators: name: Kuhfittig, Peter K. F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The embedding of a curved spacetime in a higher-dimensional flat spacetime has continued to be a topic of interest in the general theory of relativity, as exemplified by the induced-matter theory. This paper deals with spacetimes of embedding class one, i.e., spacetimes that can be embedded in a five-dimensional flat spacetime. Einstein's theory allows the fifth dimension to be either spacelike or timelike. By assuming the latter, this paper addresses two fundamental issues concerning Morris-Thorne wormholes, the origin of exotic matter and the frequently inexplicable enormous radial tension at the throat.
description: 8 pages, no figures
Selfinteractions in collections of massless tensor fields with the mixed symmetry (3,1) and (2,2)
Creators: name: Bizdadea, C.
name: Saliu, S. O.
name: Babalic, E. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Under the hypotheses of analyticity, locality, Lorentz covariance, and Poincare invariance of the deformations, combined with the requirement that the interaction vertices contain at most two spatiotemporal derivatives of the fields, we investigate the consistent selfinteractions that can be added to a collection of massless tensor fields with the mixed symmetry (3,1) and respectively (2,2). The computations are done with the help of the deformation theory based on a cohomological approach, in the context of the antifield-BRST formalism. Our result is that no selfinteractions that deform the original gauge transformations emerge. In the case of the collection of (2,2) tensor fields it is possible to add a sum of cosmological terms to the free Lagrangian.
description: 29 pages
Separability and entanglement of four-mode Gaussian states
Creators: name: Man'ko, Vladimir I.
name: Sergeevich, Alexandr A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The known Peres-Horodecki criterion and scaling criterion of separability are considered on examples of three-mode and four-mode Gaussian states of electromagnetic field. It is shown that the principal minors of the photon quadrature dispersion matrix are sensitive to the change of scaling parameters. An empirical observation has shown that the bigger the modulus of negative principal minors, the more entangled the state.
description: 14 pages, 11 figures
Sussidiarietà e diritti sociali.
Creators: name: Giliberti, Giuseppe
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: Il principio di sussidiarietà, introdotto nella recente riformulazione del Titolo V della Costituzione, e da gran parte dell’opinione pubblica e degli studiosi riconosciuto come una via di uscita dalla crisi dello Stato sociale, comporta evidenti rischi. L’intreccio tra la sussidiarietà orizzontale e quella verticale potrebbe generare un affievolimento del principio di eguaglianza e dei diritti di seconda generazione, garantiti solo nei limiti dei livelli essenziali delle prestazioni.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 4 (2008)
Analysis of Youth Participation in Agripreneurship in Benin
Creators: name: Akrong, Rexford
name: Kotu, Bekele Hundie
name: Akrong, Rexford
name: Kotu, Bekele Hundie
Publisher: name: Unknown
Year: 2021
Subjects: Labor and Human Capital

description: Session ID 4847, Paper# 18710
High-precision C17O, C18O and C16O measurements in young stellar objects: analogues for CO self-shielding in the early solar system
Creators: name: Smith, Rachel L.
name: Pontoppidan, Klaus M.
name: Young, Edward D.
name: Morris, Mark R.
name: van Dishoeck, Ewine F.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Using very high resolution (lambda / Dlambda ~ 95000) 4.7 micron fundamental and 2.3 micron overtone ro-vibrational CO absorption spectra obtained with the CRIRES infrared spectrometer on the Very Large Telescope (VLT), we report detections of four CO isotopologues -- C16O, 13CO, C18O and the rare species, C17O -- in the circumstellar environment of two young protostars, VV CrA and Reipurth 50. We argue that the observed CO absorption lines probe a protoplanetary disk in VV CrA, and a protostellar envelope in Reipurth 50. All CO line profiles are spectrally resolved, permitting direct calculation of CO oxygen isotopologue ratios with 5-10% accuracy. The ro-vibrational level populations for all species can be reproduced by assuming that CO absorption arises in two temperature regimes. For both objects, 12C/13C are on the order of 100, nearly twice the expected interstellar medium (ISM) ratio. The derived oxygen abundance ratios for the VV CrA disk show a significant mass-independent deficit of C17O and C18O relative to C16O compared to ISM baseline abundances. The Reipurth 50 envelope shows no clear differences in oxygen CO isotopologue ratios compared with the local ISM. A mass-independent fractionation can be interpreted as being due to selective photodissociation of CO in the disk surface due to self-shielding. The deficits in C17O$ and C18O$ in the VV CrA protoplanetary disk are consistent with an analogous origin of the 16O variability in the solar system by isotope selective photodissociation, confirmation of which may be obtained via study of additional sources. The higher fractionation observed for the VV CrA disk compared with the Reipurth 50 envelope is likely due to a combination of disk geometry, grain growth, and vertical mixing processes. [Abstract abridged]
description: 13 pages, accepted for publication in the Astrophysical Journal
Phase diagram and critical behavior of the pair annihilation model
Creators: name: Dickman, Adriana Gomes
name: Dickman, Ronald
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the critical behavior of the pair annihilation model (PAM) with diffusion in one, two and three dimensions, using the pair approximation (PA) and Monte Carlo simulation. Of principal interest is the dependence of the critical creation rate, lambda_c, on the diffusion probability D, in particular, whether survival is possible at arbitrarily small creation rates, for sufficiently rapid diffusion. Whilst the PA predicts that in any spatial dimension d \geq 1, lambda_c -> 0 at some diffusion probability D* < 1, Katori and Konno [Physica A {\bf 186}, 578 (1992)] showed rigorously that for d \leq 2, one has lambda_c > 0 for any D<1. Our simulation results are consistent with this theorem. In two dimensions, the extinction region becomes narrow as D approaches unity, following lambda_c \propto \exp[- \rm{const.}/(1-D)^γ], with gamma = 1.41(2). In three dimensions we find D* = 0.333(3). The simulation results confirm that the PAM belongs to the directed percolation universality class.
description: 20 pages, 6 figures
No-short scalar hair theorem for spinning acoustic black holes in a photon-fluid model
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has recently been revealed that spinning black holes of the photon-fluid model can support acoustic `clouds', stationary density fluctuations whose spatially regular radial eigenfunctions are determined by the $(2+1)$-dimensional Klein-Gordon equation of an effective massive scalar field. Motivated by this intriguing observation, we use {\it analytical} techniques in order to prove a no-short hair theorem for the composed acoustic-black-hole-scalar-clouds configurations. In particular, it is proved that the effective lengths of the stationary bound-state co-rotating acoustic scalar clouds are bounded from below by the series of inequalities $r_{\text{hair}}>{1+\sqrt{5}\over{2}}\cdot r_{\text{H}}>r_{\text{null}}$, where $r_{\text{H}}$ and $r_{\text{null}}$ are respectively the horizon radius of the supporting black hole and the radius of the co-rotating null circular geodesic that characterizes the acoustic spinning black-hole spacetime.
description: 8 pages
Determinants and Effect Evaluation of Credits on the Farm Outcome - a Micro-Perspective of Tea Production from Rwanda
Creators: name: Kabayiza, Alexis
name: Owuor, George
name: Langat, Jackson K.
name: Mugenzi, Patrice
name: Niyitanga, Fidèle
name: Kabayiza, Alexis
name: Owuor, George
name: Langat, Jackson K.
name: Mugenzi, Patrice
name: Niyitanga, Fidèle
Publisher: name: Unknown
Year: 2021
Subjects: Agricultural Finance

description: Session ID 4847, Paper# 18719
Comunicazioni elettroniche e convergenza tecnologica: concorrenza e pluralismo.
Creators: name: Magnani, Carlo
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: La libertà di comunicare il proprio pensiero liberamente, il cui riconoscimento accompagna l’affermazione del costituzionalismo moderno, rappresenta la base costituzionale di ogni libertà relativa alla sfera delle comunicazioni. Essa garantisce una delle fondamentali espressioni della individualità, tanto da collocarsi quale premessa stessa dell’organizzazione democratica del potere. Il ruolo strategico delle tecnologie delle informazione e della comunicazione è la premessa da cui muovono le politiche dell’Unione europea in merito alla Società dell’informazione. Il settore delle tecnologie della comunicazione è diventato ben presto per le istituzioni comunitarie un terreno di sperimentazione per lo sviluppo di normative e prassi innovative. Il processo di convergenza tecnologica delle reti e dei servizi che è alla base della multimedialità e della affermazione della “rete delle reti”, ha prodotto una radicale innovazione non solo nelle infrastrutture ma anche nella configurazione giuridica complessiva del sistema della informazione. I documenti comunitari che pongono le basi della Società della informazione muovono dal confronto con la realtà della convergenza tecnica tra diversi comparti delle telecomunicazioni, della radiotelevisione e delle tecnologie di comunicazione. La garanzia della concorrenza tra più operatori e reti di comunicazioni non ha solo il significato di regolare in maniera efficiente un settore merceologico, ma si pone piuttosto quale garanzia per il pluralismo della circolazione delle idee attraverso l’accesso di tutti alle risorse tecnologiche della informazione.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 4 (2008)
Aspetti problematici della recente riforma dell'ordinamento giudiziario
Creators: name: Gualtieri, Piero
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: La legge sull’ordinamento giudiziario, ancora non completamente abrogata, è stata approvata con il r.d. 30 gennaio 1941, n. 12, e dunque durante il regime fascista. Essa si inseriva in un contesto profondamente autoritario e si rapportava con un processo penale, varato nel 1930, di impronta marcatamente inquisitoria, che teneva nella massima considerazione le esigenze di tutela e controllo sociale e trascurava i diritti individuali. Caduto il regime fascista, il sistema ha subito significativi mutamenti. [segue...]
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 2 (2008): Magistrati in Europa. Indipendenza, professionalità, responsabilità
The spatial distribution of globular clusters in dwarf spheroidal galaxies and the timing problem
Creators: name: Sanchez-Salcedo, F. J.
name: Lora, V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The dynamical friction timescale of massive globular clusters (GCs) in the inner regions of cuspy dark haloes in dwarf spheroidal (dSph) galaxies can be much shorter than the Hubble time. This implies that a small fraction of the GCs is expected to be caught close to the centre of these galaxies. We compare the radial distribution of GCs predicted in simple Monte Carlo models with that of a sample of $38$ spectroscopically confirmed GCs plus 17 GC candidates, associated mainly to low-luminosity dSph galaxies. If dark matter haloes follow an NFW profile, the observed number of off-center GCs at projected distances less than one half the galaxy effective radius is significantly higher than models predict. This timing problem can be viewed as a fine-tuning of the starting GC distances. As a result of the short sinking timescale for GCs in the central regions, the radial distribution of GCs is expected to evolve significantly during the next 1-2 Gyr. However, dark matter haloes with cores of size comparable to the galaxy effective radii can lead to a slow orbital in-spiral of GCs in the central regions of these galaxies, providing a simple solution to the timing problem. We also examine any indication of mass segregation in the summed distribution of our sample of GCs.
description: 18 pages, 20 figures, accepted for publication in MNRAS
Global pharmaceutical care approaches to autism spectrum disorder: a scoping review protocol
Creators: name: Sape, Relebogile
name: Busisiwe Maseko
name: Shead, Dorothy
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Anatomy
subject: Chemicals and Drugs
subject: Nervous System
subject: Pharmaceutical Preparations
subject: Medicine and Health Sciences
subject: Medical Education
subject: ASD
subject: autism
subject: autism spectrum disorder
subject: global distribution
subject: pharmaceuticals

description: The aim of the review is to map the literary evidence regarding pharmaceutical care approaches and trends being seen globally in the treatment of the signs and symptoms of autism spectrum disorder (ASD).
Resonant Coherent Phonon Generation in Single-Walled Carbon Nanotubes through Near-Band-Edge Excitation
Creators: name: Lim, Y. -S.
name: Ahn, J. -G.
name: Kim, J. -H.
name: Yee, K. -J.
name: Joo, T.
name: Baik, S. -H.
name: Haroz, E. H.
name: Booshehri, L. G.
name: Kono, J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have observed large-amplitude coherent phonon oscillations of radial breathing modes (RBMs) in single-walled carbon nanotubes excited through the lowest-energy (E11) interband transitions. In contrast to the previously-studied coherent phonons excited through higher-energy (E22) transitions, these RBMs show comparable intensities between (n-m) mod 3 = 1 and -1 nanotubes. We also find novel non-resonantly excited RBMs over an excitation range of ~300 meV above the E11 transition, which we attribute to multi-phonon replicas arising from strong exciton-phonon coupling.
description: 17 pages, 4 figures
Impacts of Sweeping Agricultural Marketing Reforms in a Poor State of India: Evidence from Repeal of the Apmc Act in Bihar
Creators: name: Roy, Devesh
name: Saroj, Sunil
name: Kishore, Avinash
name: Kishore, Prabhat
name: Roy, Devesh
name: Saroj, Sunil
name: Kishore, Avinash
name: Kishore, Prabhat
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agricultural and Food Policy
subject: Marketing
subject: FOS: Economics and business

description: Session ID 4747, Paper# 18720
Habitat fragmentation in the Fraser River watershed : implications for salmonid habitat remediation and management
Creators: name: Zubick, Patrick
Publisher: name: University of British Columbia
Year: 2024

description: Habitat fragmentation has been implicated in broad declines of Pacific salmon and trout populations in the Pacific Northwest of North America. Dams are often considered to be the largest driver of fragmentation. However, small-scale barriers like floodgates, weirs and culverts can have significant negative impacts on stream habitat. In British Columbia (BC), Canada, an estimated 135,000 - 200,000 culverts act as barriers to fish passage, making them a major issue for salmonids and a target for restoration. Despite barrier culverts being one of the leading anthropogenic causes of stream fragmentation globally and a frequent target of restoration efforts, the efficacy of these interventions and their conformance with best practices has rarely been examined. Effective planning of these restoration efforts is often hindered by incomplete barrier inventories and uncertainty about where best to perform restoration. I addressed these issues by performing two complementary studies. I first performed a 'post-treatment' audit of culvert barrier remediations in southcentral BC through an examination of current physical attributes at 15 retrofit and 15 replacement sites and scored sites based on the BC culvert fish passage assessment and on best practice guidelines for stream crossings in BC. I then used two modelling approaches to evaluate historical habitat availability, how barriers potentially prevent Chinook and Coho salmon migrations, and the role of barrier remediation in enhancing habitat accessibility in the South Thompson watershed of BC. At barrier remediation sites, 80% of retrofits and 20% of replacements were classified as fish passage barriers, and conformance with best practices was at most 80% at any site. I modelled that Chinook and Coho salmon historically had access to 3600 km and 3400 km of stream length, and these habitats are currently impacted by 1955 barriers. These results show that fragmentation of salmon habitat is a widespread issue, potentially exacerbated by predicted barriers, and that poor conformance may be hindering the effectiveness of remediation actions.
Quantum Hall quasielectron operators in conformal field theory
Creators: name: Hansson, T. H.
name: Hermanns, M.
name: Viefers, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In the conformal field theory (CFT) approach to the quantum Hall effect, the multi-electron wave functions are expressed as correlation functions in certain rational CFTs. While this approach has led to a well-understood description of the fractionally charged quasihole excitations, the quasielectrons have turned out to be much harder to handle. In particular, forming quasielectron states requires non-local operators, in sharp contrast to quasiholes that can be created by local chiral vertex operators. In both cases, the operators are strongly constrained by general requirements of symmetry, braiding and fusion. Here we construct a quasielectron operator satisfying these demands and show that it reproduces known good quasiparticle wave functions, as well as predicts new ones. In particular we propose explicit wave functions for quasielectron excitations of the Moore-Read Pfaffian state. Further, this operator allows us to explicitly express the composite fermion wave functions in the positive Jain series in hierarchical form, thus settling a longtime controversy. We also critically discuss the status of the fractional statistics of quasiparticles in the Abelian hierarchical quantum Hall states, and argue that our construction of localized quasielectron states sheds new light on their statistics. At the technical level we introduce a generalized normal ordering, that allows us to "fuse" an electron operator with the inverse of an hole operator, and also an alternative approach to the background charge needed to neutralize CFT correlators. As a result we get a fully holomorphic CFT representation of a large set of quantum Hall wave functions.
description: minor changes, published
Magistrati in Europa: indipendenza, professionalità, responsabilità: ilcaso italiano
Creators: name: Guarnieri, Carlo
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: Per analizzare il caso italiano e confrontarlo – anche implicitamente – con quello degli altri paesi europei è necessario considerare innanzitutto le profonde trasformazioni che hanno toccato l’assetto della nostra magistratura nella seconda metà del Novecento, anche in conseguenza del processo di attuazione della Costituzione del 1948. Solo così, infatti, è possibile valutare le differenze fra l’assetto italiano e quello che prevale negli altri paesi europei e allo stesso tempo comprendere le difficoltà che qualunque tentativo di riforma è destinato ad incontrare. [Segue...]
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 2 (2008): Magistrati in Europa. Indipendenza, professionalità, responsabilità
$A$-site substitution effect on physical properties of Sr$_3$Fe$_{2-x}$Co$_x$O$_{7-δ}$
Creators: name: Tozawa, J.
name: Akaki, M.
name: Akahoshi, D.
name: Kuwahara, H.
name: Itatani, K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have investigated the $Ln^{3+}$-substitution ($Ln$ = lanthanoid) effect of a quasi two-dimensional ferromagnet Sr$_3$Fe$_{2-x}$Co$_x$O$_{7-δ}$ ($x$$ = $0.5). %$Ln^{3+}$-substitution creates antiferromagnetic insulating clusters around $Ln^{3+}$. With increasing $Ln^{3+}$-concentration, the ferromagnetism is gradually suppressed and the resistivity is increasing, which are ascribed to an increase in antiferromagnetic (AFM) clusters created by $Ln^{3+}$-substitution. In Sr$_{2.7}$Gd$_{0.3}$Fe$_{1.5}$Co$_{0.5}$O$_{7-δ}$, the magnetoresistance (MR) is enhanced by about 20 % compared with that of Sr$_3$Fe$_{1.5}$Co$_{0.5}$O$_{7-δ}$. Coexistence of ferromagnetic (FM) and AFM phases is essential for the enhancement of the MR\@. Applied magnetic fields align the FM clusters in the same direction, resulting in a reduction in the resistivity. A metamagnetic transition observed in the $Ln^{3+}$-doped samples also contributes to the enhancement of the MR.
description: 4 pages
The Mirage of Triangular Arbitrage in the Spot Foreign Exchange Market
Creators: name: Fenn, Daniel J.
name: Howison, Sam D.
name: McDonald, Mark
name: Williams, Stacy
name: Johnson, Neil F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: We investigate triangular arbitrage within the spot foreign exchange market using high-frequency executable prices. We show that triangular arbitrage opportunities do exist, but that most have short durations and small magnitudes. We find intra-day variations in the number and length of arbitrage opportunities, with larger numbers of opportunities with shorter mean durations occurring during more liquid hours. We demonstrate further that the number of arbitrage opportunities has decreased in recent years, implying a corresponding increase in pricing efficiency. Using trading simulations, we show that a trader would need to beat other market participants to an unfeasibly large proportion of arbitrage prices to profit from triangular arbitrage over a prolonged period of time. Our results suggest that the foreign exchange market is internally self-consistent and provide a limited verification of market efficiency.
Le nomine dei giudici. Rapporto adottato dalla commissione europea per la democrazia attraverso la legge (commissione di Venezia) alla sua 70° sessione plenaria (Venezia, 16-17 marzo 2007)
Creators: name: Suchocka, Hanna
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: La Commissione di Venezia ha adottato il presente rapporto alla 70° Sessione Plenaria (Venezia, 16-17 March 2007) come contributo all’elaborazione del parere n. 10 del Consultative Council of European Judges (CCJE – Consiglio consultivo dei giudici europei) sulla struttura e sul ruolo delle corti giudiziarie, come previsto dal Terms of Reference del CCJE per il 2007 (CCJE (2007), 2, punto 4.i), che impone al CCJE di consultarsi per questo parere con la Commissione di Venezia. La Commissione ha presentato il suo rapporto agli incontri del Working Party della CCJE (CCJE-GT) a Roma (28-29 marzo 2007) e a Graz (25-26 giugno 2007).
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 2 (2008): Magistrati in Europa. Indipendenza, professionalità, responsabilità
Coset for Hopf fibration and Squashing
Creators: name: Hatsuda, Machiko
name: Tomizawa, Shinya
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide a simple derivation of metrics for fundamental geometrical deformations such as Hopf fibration, squashing and Z_k quotient which play essential roles in recent studies on the AdS4/CFT3. A general metric formula of Hopf fibrations for complex and quaternion cosets is presented. Squashing is given by a similarity transformation which changes the metric preserving the isometry symmetry of the projective space. On the other hand Z_k quotient is given as a lens space which changes the topology preserving the "local" metric.
description: 19 pages, accepted for publication in Class. Quant. Gravity
Deep Layer-wise Networks Have Closed-Form Weights
Creators: name: Wu, Chieh
name: Masoomi, Aria
name: Gretton, Arthur
name: Dy, Jennifer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: There is currently a debate within the neuroscience community over the likelihood of the brain performing backpropagation (BP). To better mimic the brain, training a network \textit{one layer at a time} with only a "single forward pass" has been proposed as an alternative to bypass BP; we refer to these networks as "layer-wise" networks. We continue the work on layer-wise networks by answering two outstanding questions. First, $\textit{do they have a closed-form solution?}$ Second, $\textit{how do we know when to stop adding more layers?}$ This work proves that the Kernel Mean Embedding is the closed-form weight that achieves the network global optimum while driving these networks to converge towards a highly desirable kernel for classification; we call it the $\textit{Neural Indicator Kernel}$.
description: Since this version is similar to an older version, I should have updated the older version instead of creating a new version. I will now retract this version, and update a previous version to this. See arXiv:2006.08539
Il sistema giudiziario nel Regno Unito
Creators: name: Spencer, John Ronson
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2013

description: Il sistema di giustizia nel Regno Unito è molto diverso da quello adottato in Italia (o negli alti paesi dell’Europa continentale). Prima di affrontare l’argomento di questo convegno, sono necessarie alcune premesse di ordine generale sui giudici britannici. Nel Regno Unito coesistono, infatti, tre diversi ordinamenti giuridici uno per l’Inghilterra e il Galles; uno per la Scozia; uno per l’Irlanda del Nord.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 59, N. 2 (2008): Magistrati in Europa. Indipendenza, professionalità, responsabilità