cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Free utility model for explaining the social gravity law
Creators: name: Wang, Hao
name: Yan, Xiao-Yong
name: Wu, Jinshan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Social gravity law widely exists in human travel, population migration, commodity trade, information communication, scientific collaboration and so on. Why is there such a simple law in many complex social systems is an interesting question. Although scientists from fields of statistical physics, complex systems, economics and transportation science have explained the social gravity law, a theoretical explanation including two dominant mechanisms, namely individual interaction and bounded rationality, is still lacking. Here we present a free utility model, whose objective function is mathematically consistent with the Helmholtz free energy in physics, from the perspective of individual choice behavior to explain the social gravity law. The basic assumption is that bounded rational individuals interacting with each other will trade off the expected utility and information-processing cost to maximize their own utility. The previous explanations of the social gravity law including the maximum entropy model, the free cost model, the Logit model and the destination choice game model are all special cases under our model. Further, we extend the free utility model to the network. This model not only helps us to better understand the underlying mechanisms of spatial interaction patterns in complex social systems, but also provides a new perspective for understanding the potential function in game theory and the user equilibrium model in transportation science.
description: 9 pages, 2 figures
From 100 MHz to 10 GHz: Unveiling the spectral evolution of the X-shaped radio galaxy in Abell 3670
Creators: name: Bruno, L.
name: Brienza, M.
name: Zanichelli, A.
name: Gitti, M.
name: Ubertosi, F.
name: Rajpurohit, K.
name: Venturi, T.
name: Dallacasa, D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-shaped radio galaxies (XRGs) are characterised by two pairs of misaligned lobes, namely the active lobes hosting radio jets and the wings. None of the formation mechanisms proposed so far can exhaustively reproduce the diverse features observed among XRGs. The emerging evidence is the existence of sub-populations of XRGs forming via different processes. The brightest cluster galaxy in Abell 3670 (A3670) is a dumbbell system hosting the XRG MRC 2011-298. The morphological and spectral properties of this interesting XRG have been first characterised through Karl G. Jansky Very Large Array (JVLA) data at 1-10 GHz. In the present work, we followed-up MRC 2011-298 with the upgraded Giant Metrewave Radio Telescope (uGMRT) at 120-800 MHz to further constrain its properties and origin. We carried out a detailed spectral analysis sampling different spatial scales. Integrated radio spectra, spectral index maps, radio colour-colour diagrams, and radiative age maps of both the active lobes and prominent wings have been employed to test the origin of the source. We confirm a progressive spectral steepening from the lobes to the wings. The maximum radiative age of the source is $\sim 80$ Myr, with the wings being older than the lobes by $\gtrsim 30$ Myr in their outermost regions. The observed properties are in line with an abrupt reorientation of the jets by $\sim 90$ deg from the direction of the wings to their present position. This formation mechanism is further supported by the comparison with numerical simulations in the literature, which additionally highlight the role of hydrodynamic processes in the evolution of large wings such as those of MRC 2011-298. Potentially, the coalescence of supermassive black holes could have triggered the spin-flip of the jets. Moreover, we show that the S-shape of the radio jets is likely driven by precession with a period $P \sim 10$ Myr.
description: 23 pages (including Appendices), 14 figures. Accepted for publication in A&A
Making sense of part-time professional work arrangements
Creators: name: Clark, Vivien Sarah
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation is about part-time professional work arrangements - how they are created and sustained within particular organizational contexts. I argue that, while this category of workers is growing, it still poses a challenge to professionals attempting to enact part-time professional work in particular organizational contexts. Drawing on research in the areas of organizational culture, socialization, and interaction rituals, I locate this challenge in the social interactions through which part-time professionals and those they work with attempt to navigate the job- and role-related implications of moving to a part-time professional work schedule. Through in-depth, semi-structured interviews with part-time professionals, and in some cases their managers and coworkers, in each of four organizational contexts, I developed a list of seven conceptual categories which describe the work which goes into creating and sustaining part-time professional work arrangements. These categories are: laying the groundwork [for the move to part-time], creating the part-time position, and establishing expectations (all associated with the move to part-time work); and nmnaging work, managing boundaries, managing social networks, and managing [the social] discourse [of part-time professional work]. I found that professionals and those they work with are far more likely to focus on the job-related implications than they are the role-related implications of part-time professional work. I argue that by offering alternative work arrangements for professionals, organizations invite role innovation; by playing with the basic feature of the professional role (everavailability), they invite a new, contemporary definition of what it means to be a professional. However, these organizations fail to provide explicit guidelines for what this new definition might mean in terms of actual behaviours and relationships. The enactment of the actual terms of the arrangement is left up to the part-time professionals and those with whom they work. In other words, organizational support is a necessary but not sufficient condition for the creation of a part-time professional role. In contributing to our understanding of part-time professionals, this observation has two significant consequences. First, it suggests that professionals, their managers and coworkers are working without a prepared script and under locally idiosyncratic conditions. Second, it suggests that recognizing and processing these local arrangements at the organizational level will pose a challenge: that part-time work arrangements are, and have the potential to remain, ad hoc and locally idiosyncratic, suggests that future would-be part-time professionals may still be required to write their own scripts.
Conservation and Integrability in Lower-Dimensional Gravity
Creators: name: Ruzziconi, Romain
name: Zwikel, Céline
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We address the questions of conservation and integrability of the charges in two and three-dimensional gravity theories at infinity. The analysis is performed in a framework that allows us to treat simultaneously asymptotically locally AdS and asymptotically locally flat spacetimes. In two dimensions, we start from a general class of models that includes JT and CGHS dilaton gravity theories, while in three dimensions, we work in Einstein gravity. In both cases, we construct the phase space and renormalize the divergences arising in the symplectic structure through a holographic renormalization procedure. We show that the charge expressions are generically finite, not conserved but can be made integrable by a field-dependent redefinition of the asymptotic symmetry parameters.
description: 41 pages, references and "Comments" section added, published version
An Economic Evaluation of Contract Marketing
Creators: name: Phillips, John
name: Phillips, John
Publisher: name: Unknown
Year: 1968
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper analyses the efficiency consequences of the introduction of contract marketing. It interprets contracts as a means for extending the use of information and increasing the efficiency of its transmission. It is shown that the present system, based on spot markets, falls short of the ideal in which the marginal value product of informational resources equals their marginal cost, marginal cost being the least technically possible. Contracting reduces this disparity and in so doing improves short and long run resource allocation, accelerates innovation, diminishes overhead costs and enhances the efficiency of obtaining information.
Full non-LTE spectral line formation III. The case of a two-level atom with broadened upper level
Creators: name: Sampoorna, M.
name: Paletou, F.
name: Bommier, V.
name: Lagache, T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In the present paper we consider the full nonlocal thermodynamic equilibrium (non-LTE) radiation transfer problem. This formalism allows us to account for deviation from equilibrium distribution of both the radiation field and the massive particles. In the present study two-level atoms with broadened upper level represent the massive particles. In the absence of velocity-changing collisions, we demonstrate the analytic equivalence of the full non-LTE source function with the corresponding standard non-LTE partial frequency redistribution (PFR) model. We present an iterative method based on operator splitting techniques to numerically solve the problem at hand. We benchmark it against the standard non-LTE transfer problem for a two-level atom with PFR. We illustrate the deviation of the velocity distribution function of excited atoms from the equilibrium distribution. We also discuss the dependence of the emission profile and the velocity distribution function on elastic collisions and velocity-changing collisions.
description: Accepted for publication in A&A
Australia's Real Exchange Rate: 1985 to 1990
Creators: name: Dixon, Peter B.
name: Parmenter, B.R.
name: Dixon, Peter B.
name: Parmenter, B.R.
Publisher: name: Unknown
Year: 1988
Subjects: International Relations/Trade

description: A published version of this paper is available in Economic Papers 6 (2), June 1987, 1-6.
The Lens Galaxy In PG1115+080 is an Ellipse
Creators: name: Yoo, Jaiyul
name: Kochanek, Christopher S.
name: Falco, Emilio E.
name: McLeod, Brian A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the structure of the Einstein ring image of the quasar host galaxy in the four-image quasar lens PG1115+080 to determine the angular structure of the gravitational potential of the lens galaxy. We find that it is well described as an ellipsoid and that the best fit non-ellipsoidal models are consistent with the ellipsoidal model. We find upper limits on the standard parameters for the m=3 and m=4 deviations from an ellipse of <0.035 and <0.064, respectively. We also find that the position of the center of mass is consistent with the center of light, with an upper limit of 0.005 arcsec on the offset between them. Neither the ellipsoidal nor the non-ellipsoidal models can reproduce the observed image flux ratios while simultaneously maintaining a reasonable fit to the Einstein ring, so the anomalous flux ratio of the A_1 and A_2 quasar images must be due to substructure in the gravitational potential such as compact satellite galaxies or stellar microlenses rather than odd angular structure in the lens galaxy.
description: 7 pages, 3 figures, accepted for publication in The Astrophysical Journal
A Novel Magnetoscan Setup
Creators: name: Haindl, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Due to a modification in the original magnetoscan setup, a significant improvement in resolution was obtained. The paper focuses on experimental results which should support the idea of the new setup using two magnets with opposite direction of magnetization. This contribution to the characterization techniques of melt-grown bulk superconductors should promote the easy installation of this technique in industry. The improved magnetoscan technique may further help to investigate growth-induced inhomogeneities of the top-seeded-melt-growth process in the submillimeter range, and it offers new possibilities to the characterization of smaller structures such as superconducting films or coated conductors.
description: 7 pages, 7 figures
Elicitation on frog story transcription and relative clauses
Creators: name: Rudolph, Johnny (Soni)
name: Ding, Lydia
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: nkr

description: One .wav audio file and one .rtf transcription file for an elicitation transcribing Johnny Rudolph's frog story and investigating relative clauses and alienability. Corresponds to pages 111-119 in Notebook 1.
Spectral eigenfunction decomposition of a Fokker-Planck operator for relativistic heavy-ion collisions
Creators: name: Rizzi, A.
name: Wolschin, G.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A spectral solution method is proposed to solve a previuously developed non-equilibrium statistical model describing partial thermalization of produced charged hadrons in relativistic heavy-ion collisions, thus improving the accuracy of the numerical solution. The particle's phase-space trajectories are treated as drift-diffusion stochastic process, leading to a Fokker-Planck equation (FPE) for the single-particle probability distribution function. The drift and diffusion coefficients are derived from the expected asymptotic states via appropriate fluctuation-dissipation relations, and the resulting FPE is then solved numerically using a spectral eigenfunction decomposition. The calculated time-dependent particle distributions are compared to Pb-Pb data from the ATLAS and ALICE collaborations at the Large Hadron Collider.
description: 17 pages, 8 figures; submitted to Eur. Phys. J. A
Dual Encoding for Video Retrieval by Text
Creators: name: Dong, Jianfeng
name: Li, Xirong
name: Xu, Chaoxi
name: Yang, Xun
name: Yang, Gang
name: Wang, Xun
name: Wang, Meng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Information Retrieval (cs.IR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: This paper attacks the challenging problem of video retrieval by text. In such a retrieval paradigm, an end user searches for unlabeled videos by ad-hoc queries described exclusively in the form of a natural-language sentence, with no visual example provided. Given videos as sequences of frames and queries as sequences of words, an effective sequence-to-sequence cross-modal matching is crucial. To that end, the two modalities need to be first encoded into real-valued vectors and then projected into a common space. In this paper we achieve this by proposing a dual deep encoding network that encodes videos and queries into powerful dense representations of their own. Our novelty is two-fold. First, different from prior art that resorts to a specific single-level encoder, the proposed network performs multi-level encoding that represents the rich content of both modalities in a coarse-to-fine fashion. Second, different from a conventional common space learning algorithm which is either concept based or latent space based, we introduce hybrid space learning which combines the high performance of the latent space and the good interpretability of the concept space. Dual encoding is conceptually simple, practically effective and end-to-end trained with hybrid space learning. Extensive experiments on four challenging video datasets show the viability of the new method.
description: Accepted by IEEE Transactions on Pattern Analysis and Machine Intelligence. Code and data will be available at https://github.com/danieljf24/hybrid_space. Conference version: arXiv:1809.06181
Αυθαίρετα και Εθνικό Κτηματολόγιο
Creators: name: Καταπόδης, Στέφανος Σταμάτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Αυθαίρετες Κατασκευές
Εθνικό Κτηματολόγιο
Ν.4495/2017
Illegal Constructions
National Cadastre
Law 4495/2017

description: Η παρούσα διπλωματική εκπονήθηκε στο πλαίσιο ολοκλήρωσης του Διατμηματικού Μεταπτυχιακού Προγράμματος «Κτηματολόγιο: Νομικές, Τεχνικές και Περιβαλλοντικές Διαστάσεις». Ειδικότερα, αφορά στη διαχρονική μάστιγα του ελληνικού πολεοδομικού συστήματος, τις αυθαίρετες κατασκευές. Μέσα από μια λεπτομερή καταγραφή του αντικειμένου, αναλύονται σύνθετα νομικά ζητήματα που έχουν προβληματίσει ανά καιρούς τόσο τη θεωρία όσο και τη νομολογία των πολιτικών δικαστηρίων και του ΣτΕ. Η διπλωματική εργασία εκκινεί από την ιστορική ανασκόπηση του προβλήματος καθώς και των αποπειρών που έχουν γίνει ανά διαστήματα από τον Έλληνα νομοθέτη για τον περιορισμό των αυθαιρέτων κατασκευών. Στη συνέχεια, αναλύεται λεπτομερώς η έννοια της αυθαίρετης κατασκευής καθώς και οι έννομες συνέπειες σε περίπτωση διαπίστωσής της. Ακολουθεί η διερεύνηση της συνταγματικότητας των κυρώσεων του Ν.4495/2017 και αναλύονται σύγχρονα ζητήματα που απασχολούν την πολεοδομική και συμβολαιογραφική πρακτική. Κατόπιν των ανωτέρω, γίνεται αναφορά στο εθνικό κτηματολόγιο, στον σκοπό που εξυπηρετεί και στη σύνθετη λειτουργία του. Αναλύονται οι θεμελιώδης αρχές που το διέπουν με ιδιαίτερη έμφαση στην αρχή της νομιμότητας και στην αρχή του ανοιχτού κτηματολογίου. Τέλος, συσχετίζεται το εθνικό κτηματολόγιο με το καίριο πρόβλημα των αυθαιρέτων κατασκευών και αναζητείται ένας τρόπος αναχαίτισης του τελευταίου με τα μέσα και τον έλεγχο που μπορεί να προσφέρει η κτηματολογική βάση.
description: The present thesis was prepared within the framework of the completion of the Postgraduate Program 'Cadastre: Legal, Technical, and Environmental Dimensions.' Specifically, it deals with the chronic problem of illegal constructions within the Greek urban planning system. Through a detailed examination of the subject, complex legal issues are analyzed, which have concerned both the theory and jurisprudence of the courts and the Council of State. The thesis begins with a historical overview of the problem and the attempts made by the Greek legislator at various intervals to restrict illegal constructions. Subsequently, the concept of an illegal construction is thoroughly analyzed, along with the legal consequences in case of its identification. The constitutionality of the penalties imposed by Law 4495/2017 is then explored, and contemporary issues that concern urban planning and notarial practice are examined. Following the above, reference is made to the national cadastre, its purpose, and its complex functioning. The fundamental principles governing it are analyzed with particular emphasis on the principle of legality and the principle of open cadastre. Finally, the national cadastre is correlated with the crucial problem of illegal constructions, and a way to contain the latter is sought through the means and control that the cadastral system can offer.
Exact entanglement probability distribution of bi-partite randomised stabilizer states
Creators: name: Dahlsten, Oscar
name: Plenio, Martin B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement properties of random pure stabilizer states in spin-1/2 particles. For two contiguous groups of spins of arbitrary size we obtain a compact and exact expression for the probability distribution for the entanglement values between the two sets. This allows for exact derivations of the average entanglement and the degree of concentration of measure around this average. We also give simple bounds on these quantities. We find that for large systems the average entanglement is near maximal and the measure is concentrated around it.
description: 7 pages, 2 figures, replaced with published version
Reproducibility package for "Automated generation of process simulation scenarios from declarative control-flow changes"
Creators: name: Barón-Espitia, Daniel
name: Dumas, Marlon
name: González-Rojas, Oscar
Publisher: name: Zenodo
Year: 2024
Subjects: Declarative specification
Control-flow changes
Data-driven simulation
Stochastic process model
What-if analysis

description: Data and generated models for research article Automated generation of process simulation scenarios from declarative control-flow changes.

This record contains the event logs, deep learning generative models (*.h5 and *.m format), generated simulation models for the BIMP simulator (*.bpmn format), and all the raw and summarized results of the paper (data folder). 

The source code of the project can be found at: https://github.com/AdaptiveBProcess/DeclarativeProcessSimulation
Entropic uncertainty relations for SIC-POVMs and MUMs
Creators: name: Huang, Shan
name: Chen, Zeng-Bing
name: Wu, Shengjun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct inequalities between Rényi entropy and the indexes of coincidence of probability distributions, based on which we obtain improved state-dependent entropic uncertainty relations for general symmetric informationally complete positive operator-valued measures (SIC-POVM) and mutually unbiased measurements (MUM) on finite dimensional systems. We show that our uncertainty relations for general SIC-POVMs and MUMs can be tight for sufficiently mixed states, and moreover, comparisons to the numerically optimal results are made via information diagrams.
Afterglow Observations Shed New Light on the Nature of X-ray Flashes
Creators: name: Granot, Jonathan
name: Ramirez-Ruiz, Enrico
name: Perna, Rosalba
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: X-ray flashes (XRFs) and X-ray rich gamma-ray bursts (XRGRBs) share many observational characteristics with long duration GRBs, but the reason for which their prompt emission peaks at lower photon energies, $E_p$, is still under debate. Although many different models have been invoked in order to explain the lower $E_p$ values, their implications for the afterglow emission were not considered in most cases, mainly because observations of XRF afterglows have become available only recently. Here we examine the predictions of the various XRF models for the afterglow emission, and test them against the observations of XRF 030723 and XRGRB 041006, the events with the best monitored afterglow light curves in their respective class. We show that most existing XRF models are hard to reconcile with the observed afterglow light curves, which are very flat at early times. Such light curves are, however, naturally produced by a roughly uniform jet with relatively sharp edges that is viewed off-axis (i.e. from outside of the jet aperture). This type of model self consistently accommodates both the observed prompt emission and the afterglow light curves of XRGRB 041006 and XRF 030723, implying viewing angles $θ_{obs}$ from the jet axis of $(θ_{obs}-θ_0)\sim 0.15θ_0$ and $\sim θ_0$, respectively, where $θ_0\sim 3$ deg is the jet half-opening angle. This suggests that GRBs, XRGRBs and XRFs are intrinsically similar relativistic jets viewed from different angles, corresponding to $γ(θ_{obs}-θ_0)$ of less than 1, between 1 and a few, and more than a few, respectively, where $γ$ is the Lorentz factor. Future observations with Swift could help test this unification scheme in which GRBs, XRGRBs and XRFs share the same basic physics and differ only by their orientation relative to our line of sight.
description: some references added, small typos corrected, and the important role of HETE II emphasized
Europa's H$_2$O$_2$: Temperature Insensitivity and a Correlation with CO$_2$
Creators: name: Wu, Peiyu
name: Trumbo, Samantha K.
name: Brown, Michael E.
name: de Kleer, Katherine
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: H$_2$O$_2$ is part of Europa's water-ice radiolytic cycle and a potential source of oxidants to Europa's subsurface ocean. However, factors controlling the concentration of this critical surface species remain unclear. Though laboratory experiments suggest that Europa's H$_2$O$_2$ should be concentrated in the coldest, most ice-rich regions toward the poles, Keck adaptive optics observations have shown the strongest H$_2$O$_2$ signatures in comparatively warm, salt-bearing terrain at low latitudes. As a result, it was suggested that the local non-ice composition of these terrains -- particularly hypothesized enrichments of CO$_2$ -- may be a more dominant control on H$_2$O$_2$ than temperature or water-ice abundance. Here, we use observations of Europa from the NASA Infrared Telescope Facility, Keck Observatory, and JWST to disentangle the potential effects of temperature and composition. In order to isolate the effect of temperature on Europa's H$_2$O$_2$, we use the ground-based observations to assess its response to temperature changes over timescales associated with Europa's daily eclipse and diurnal cycle. We use JWST Cycle 1 data to look for any geographic correlation between Europa's H$_2$O$_2$ and CO$_2$. Both changes in Europa's 3.5-$μ$m H$_2$O$_2$ absorption band from pre to post eclipse and across a local day suggest minimal effects of the local temperature on these timescales. In contrast, the JWST observations show a strong positive correlation between Europa's H$_2$O$_2$ and CO$_2$ bands, supporting the previously suggested possibility that the presence of CO$_2$ in the ice may enhance H$_2$O$_2$ concentrations via electron-scavenging.
description: 17 pages, 4 figures, Accepted to the Planetary Science Journal
Density waves in the shearing sheet V. Feedback cycle for swing amplification by non-linear effects
Creators: name: Fuchs, B.
name: Dettbarn, C.
name: Tsuchiya, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Non-linear effects in the dynamical evolution of a shearing sheet made of stars are studied. First the implications of hitherto neglected non-linearities of the Boltzmann equation for the dynamical evolution of the shearing sheet are investigated. Using a formalism developed previously on the basis of the linearized Boltzmann equation it is demonstrated that the inclusion of the non-linear term leads to a feedback cycle for swing amplified density waves in the unbounded shearing sheet. Such a feedback is unique to star disks and is not known for gas disks. In order to present concrete examples of the non-linear feedback cycle a SCF code was developed and numerical simulations of the dynamical evolution of the shearing sheet are performed. The numerical results seem to confirm the theoretical predictions. The evolution of the shearing sheet resembles closely and might actually explain the recurrent spiral instabilities found in large-scale numerical simulations of the dynamical evolution of galactic disks.
description: 13 pages, 11 figures, accepted by Astron. Astrophys
RURAL PRODUCT PROMOTION: ECONOMIC ASPECTS OF PROMOTABILITY, ORGANIZATION AND PUBLIC ASSISTANCE
Creators: name: De Boer, A.J.
name: De Boer, A.J.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The economic theory of product promotion has been developed within the framework of the theory of imperfect competition and under rather restrictive conditions. Application of these theories to rural product promotion is, in most cases, of limited value. This paper first examines some characteristics of agricultural product markets which necessitate modification of standard promotion theory. Some further complex issues in promotion theory as it relates to agricultural products are then examined. These include the stabilization of funds fOl financing promotion expenditures, promotion strategy under price discrimination schemes characteristic of several Australian primary product markets, the welfare consequences of promotion by primary producer promotion cartels, possible terms of trade effects of overseas promotion expenditures, and subsidies for rural product promotion as a form of tariff compensating income transfers. The paper concludes with a discussion of the cases for public intervention in rural product promotion.
Decay and coherence of two-photon excited yellow ortho-excitons in Cu2O
Creators: name: Karpinska, K.
name: Mostovoy, M.
name: van der Vegte, M. A.
name: Revcolevschi, A.
name: van Loosdrecht, P. H. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Photoluminescence excitation spectroscopy has revealed a novel, highly efficient two-photon excitation method to produce a cold, uniformly distributed high density excitonic gas in bulk cuprous oxide. A study of the time evolution of the density, temperature and chemical potential of the exciton gas shows that the so called quantum saturation effect that prevents Bose-Einstein condensation of the ortho-exciton gas originates from an unfavorable ratio between the cooling and recombination rates. Oscillations observed in the temporal decay of the ortho-excitonic luminescence intensity are discussed in terms of polaritonic beating. We present the semiclassical description of polaritonic oscillations in linear and non-linear optical processes.
description: 14 pages, 12 figures
Longitudinal and transverse electric field manipulation of hole spin-orbit qubits in one-dimensional channels
Creators: name: Michal, Vincent P.
name: Venitucci, Benjamin
name: Niquet, Yann-Michel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Holes confined in semiconductor nanostructures realize qubits where the quantum mechanical spin is strongly mixed with the quantum orbital angular momentum. The remarkable spin-orbit coupling allows for fast all electrical manipulation of such qubits. We study an idealization of a CMOS device where the hole is strongly confined in one direction (thin film geometry), while it is allowed to move more extensively along a one-dimensional channel. Static electric bias and $ac$ electrical driving are applied by metallic gates arranged along the channel. In quantum devices based on materials with a bulk inversion symmetry, such as silicon or germanium, there exists different possible spin-orbit coupling based mechanisms for qubit manipulation. One of them, the $g$-tensor magnetic resonance ($g$-TMR), relies on the dependence of the effective $g$-factors on the electrical confinement. In this configuration the hole is driven by an $ac$ field parallel to the static electric field and perpendicular to the channel (transverse driving). Another mechanism, which we refer to here as iso-Zeeman electric dipole spin resonance (IZ-EDSR), is due to the Rashba spin-orbit coupling that leads to an effective time-dependent magnetic field experienced by the pseudo-spin oscillating along the quantum channel (longitudinal driving). We compare these two modes of operation and we describe the conditions where the magnitudes of the Rabi frequencies are the largest. Different regimes can be attained by electrical tuning where the coupling to the $ac$ electric field is made either weak or strong...
description: Minor modifications made before publication
Elicitation on verbs, tense, and aspect
Creators: name: Rudolph, Johnny (Soni)
name: Ding, Lydia
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: nkr

description: One .wav audio file and one .rtf transcription file for an elicitation on verbs and adjectives and their nominalizations; tense and aspect and their intersection with telicity; and some data on kana and mele. Corresponds to pages 122-132 in Notebook 1.
Original energy dissipation preserving corrections of integrating factor Runge-Kutta methods for gradient flow problems
Creators: name: Liao, Hong-lin
name: Wang, Xuping
name: Wen, Cao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35K58, 65L20, 65M06, 65M12

description: Explicit integrating factor Runge-Kutta methods are attractive and popular in developing high-order maximum bound principle preserving time-stepping schemes for Allen-Cahn type gradient flows. However, they always suffer from the non-preservation of steady-state solution and original energy dissipation law. To overcome these disadvantages, some new integrating factor methods are developed by using two classes of difference correction, including the telescopic correction and nonlinear-term translation correction, enforcing the preservation of steady-state solution. Then the original energy dissipation properties of the new methods are examined by using the associated differential forms and the differentiation matrices. As applications, some new integrating factor Runge-Kutta methods up to third-order maintaining the original energy dissipation law are constructed by applying the difference correction strategies to some popular explicit integrating factor methods in the literature. Extensive numerical experiments are presented to support our theory and to demonstrate the improved performance of new methods.
description: 25 pages,55 figures
Random decoupling schemes for quantum dynamical control and error suppression
Creators: name: Viola, Lorenza
name: Knill, Emanuel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a general control-theoretic framework for constructing and analyzing random decoupling schemes, applicable to quantum dynamical control of arbitrary finite-dimensional composite systems. The basic idea is to design the control propagator according to a random rather than deterministic path on a group. We characterize the performance of random decoupling protocols, and identify control scenarios where they can significantly weaken time scale requirements as compared to cyclic counterparts. Implications for reliable quantum computation are discussed.
description: 9 pages, no figures
Possibility of primordial black holes as the source of gravitational wave events in the advanced LIGO detector
Creators: name: Khalouei, E.
name: Ghodsi, H.
name: Rahvar, S.
name: Abedi, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The analysis of gravitational Wave (GW) data from advanced LIGO provides the mass of each companion of binary black holes as the source of GWs. The mass of events corresponding to the binary black holes from GW is above $20$ M$_\odot$ which is much larger than the mass of astrophysical black holes detected by x-ray observations. In this work, we examine primordial black holes (PBHs) as the source of LIGO events. Assuming that $100\%$ of the dark matter is made of PBHs, we estimate the rate at which these objects make binaries, merge, and produce GWs as a function of redshift. The gravitational lensing of GWs by PBHs can also enhance the amplitude of the strain. We simulate GWs sourced by binary PBHs, with the detection threshold of $S/N>10$ for both Livingston and Hanford detectors. For the log-normal mass function of PBHs, we generate the expected distribution of events, compare our results with the observed events, and find the best value of the mass function parameters (i.e., $M_c =25 M_\odot$ and $σ=0.6$) in the log-normal mass function. Comparing the expected number of events with the number of observed ones rules out the present-Universe binary formation PBH scenario as the candidate for the source of GW events detected by LIGO.
description: Final published version
Rhapsody for saxophone and orchestra
Creators: name: Currie, Neil Alan
Publisher: name: University of British Columbia
Year: 2009

description: Rhapsody for Saxophone and Orchestra is a work of 15 minutes duration, scored for solo alto saxophone, flute (doubling piccolo), oboe, clarinet, bassoon, horn, timpani, percussion, piano, and strings. Within the work, an invented harmonic structure is combined with a freely improvised melody that is subjected to a large-scale formal process of phrase expansion and contraction. Layers of musical activity, involving interval templates (defined as invariant patterns of pitches), phrase-lengths, melodic contour, referential rhytlimic gestures, and pedal-notes are set in motion from the outset. While operating independently, these musical elements converge at major section points in the work, of which there are ten. The ultimate aim is to devise engrossing musical textures that embody variation within coherence, and possess strong goal-directionality. The method of composing with interval pairs represents a novel approach to harmony, and the resulting harmonic structures underlie much, but not all of the work. In terms of melody, the predominantly step-wise and back-circling (melody which moves away from then back towards a central tone) character is also of great significance in the work, providing the basis for much canonic imitation. The commencement of a new section in the work is often marked by two gestures: a treble pedal figure, and a "bouncing" figure, which occur in the first and last quarters of the work. Examination of larger-scale structures designated as "super-sections" (each comprising three or four sections) reveals the systematic phrase expansion and contraction that juxtaposes sections with short phrases next to those with long ones. This expansion and contraction of phrases creates the ultimate structure of the work.
On the Stability of Analytic Germs under Ultradifferentiable Perturbations
Creators: name: Thilliez, Vincent
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 58K40; 26E10; 32B10

description: Let $ f$ be a real-analytic function germ whose critical locus contains a given real-analytic set $ X $, and let $ Y $ be a germ of closed subset of $ \mathbb{R}^n $ at the origin. We study the stability of $ f $ under perturbations $ u $ that are flat on $ Y $ and that belong to a given Denjoy-Carleman non-quasianalytic class. We obtain a condition ensuring that $ f+u=f\circΦ$ where $ Φ$ is a germ of diffeomorphism whose components belong to a (generally larger) Denjoy-Carleman class. Roughly speaking, this condition involves a Łojasiewicz-type separation property between $ Y $ and the complex zeros of a certain ideal associated with $ f $ and $ X $. The relationship between the Denjoy-Carleman classes of $ u$ and $ Φ$ is controlled precisely by the inequality. This result extends, and simplifies, former work of the author on germs with isolated critical points.
description: AMS-LaTeX, 10 pages
Unveiling accretion in the massive YSO G033.3891. Spatial and kinematic constraints from the CO bandhead emission
Creators: name: Koumpia, E.
name: Sun, D.
name: Koutoulaki, M.
name: Ilee, J. D.
name: de Wit, W. -J.
name: Oudmaijer, R. D.
name: Frost, A. J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The inner parts of the hot discs surrounding massive young stellar objects (MYSOs) are still barely explored due to observational limitations in terms of angular resolution, scarcity of diagnostic lines and the embedded and rare nature of these targets. We present the first K-band spectro-interferometric observations toward the MYSO G033.3891, which based on former kinematic evidence via the CO bandhead emission is known to host an accreting disc. Using the high spectral resolution mode (R$\sim$4000) of the GRAVITY/VLTI, we spatially resolve the emission of the inner dusty disc and the crucial gaseous interface between the star and the dusty disc. Using detailed modelling on the K-band dust continuum and tracers known to be associated with the ionised and molecular gaseous interface (Br$γ$, CO), we report on the smallest scales of accretion/ejection. The new observations in combination with our geometric and kinematic models employed to fit former high spectral resolution observations on the source (R$\sim$30,000; CRIRES/VLTI) allow us to constrain the size of the inner gaseous disc both spatially and kinematically via the CO overtone emission at only 2 au. Our models reveal that both Br$γ$ and CO emissions are located well within the dust sublimation radius (5~au) as traced by the hot 2.2~$μ$m dust continuum. Our paper provides the first case study where the tiniest scales of gaseous accretion around the MYSO G033.3891 are probed both kinematically and spatially via the CO bandhead emission. This analysis of G033.3891 stands as only the second instance of such investigation within MYSOs, underscoring the gradual accumulation of knowledge regarding how massive young stars gain their mass, while further solidifying the disc nature of accretion at the smallest scales of MYSOs.
description: Accepted for publication in A&A (9 pages, 5 figures, 2 tables)
Should I Lie to You? A Review of Victoria’s Law regarding Disclosure of Surrogacy Arrangements to the Children They Produce — Is It Compliant with the Convention on the Rights of the Child?
Creators: name: Butterfield, Meghan
Publisher: name: Monash University
Year: 2021
Subjects: subject: Law
subject: FOS: Law

description: This paper discusses the rights of children born via surrogacy arrangements (‘surrogate children’) in Victoria to be given information about the existence of the surrogate. Relevant provisions of the Assisted Reproductive Treatment Act 2008 (Vic) are analysed to show that donor-conceived children and surrogate children are treated differently when it comes to access to information regarding their heritage and birth which is based on a narrow conceptualisation of genetics and biology. By failing to take reasonable measures to ensure intended parents of surrogate children inform those children of the existence of the surrogate, it is argued that Victoria fails to comply with its obligations under arts 3, 7 and 8 of the Convention on the Rights of the Child.
#kulturerbedigital vom Nutzen her denken. Über offene Datenangebote und wie wir mehr aus ihnen machen
Creators: name: Winkler, Alexander
Publisher: name: Zenodo
Year: 2025
Subjects: FAIR
reuse
glam
openglam

description: Slides zum Vortrag für die Online-Veranstaltung Offenheit reicht nicht aus – Auf dem Weg zu einer lebendigen Datenkultur von KOBV und digiS, der 4. Veranstaltung in der Reihe „Quo vadis offene Wissenschaft in Berlin und Brandenburg“ (Programm unter https://blogs.fu-berlin.de/open-access-berlin/2024/12/16/quo-vadis-4-offene-datenkultur/)
Directional electron-filtering at a superconductor-semiconductor interface
Creators: name: Breunig, Daniel
name: Zhang, Song-Bo
name: Trauzettel, Björn
name: Klapwijk, T. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We evaluate the microscopically relevant parameters for electrical transport of hybrid superconductor-semiconductor interfaces. In contrast to the commonly used geometrically constricted metallic systems, we focus on materials with dissimilar electronic properties like low-carrier density semiconductors combined with superconductors, without imposing geometric confinement. We find an intrinsic mode-selectivity, a directional momentum-filter, due to the differences in electronic band-structure, which creates a separation of electron reservoirs each at the opposite sides of the semiconductor, while at the same time selecting modes propagating almost perpendicular to the interface. The electronic separation coexists with a transport current dominated by Andreev reflection and low elastic back-scattering, both dependent on the gate-controllable electronic properties of the semiconductor.
description: 9 pages, 6 figures
Fast identification of transits from light-curves
Creators: name: Protopapas, Pavlos
name: Jimenez, Raul
name: Alcock, Charles
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an algorithm that allows fast and efficient detection of transits, including planetary transits, from light-curves. The method is based on building an ensemble of fiducial models and compressing the data using the MOPED algorithm. We describe the method and demonstrate its efficiency by finding planet-like transits in simulated Pan-STARRS light-curves. We show that that our method is independent of the size of the search space of transit parameters. In large sets of light-curves, we achieve speed up factors of order of $10^{8}$ times over the full $\chi2$ search. We discuss how the algorithm can be used in forthcoming large surveys like Pan-STARRS and LSST and how it may be optimized for future space missions like Kepler and COROT where most of the processing must be done on board.
description: 9 pages, 9 figures
Phase Space Analysis and Thermodynamics of Interacting Umami Chaplygin gas in FRW Universe
Creators: name: Biswas, Sujay Kr.
name: Biswas, Atreyee
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In this work interacting Umami Chaplygin gas has been studied in flat FRW model of universe in context of it's thermodynamic and dynamical behaviour. In particular, considering Umami fluid as dark energy interacting with dark matter, irreversible thermodynamics has been studied both for apparent and event horizon as bounding horizon in two separate cases. Also the model has been investigated in purview of dynamical systems analysis by converting the cosmological evolution equations to an autonomous system of ordinary differential equations. With some restrictions on model parameter $ω$ and coupling parameter $λ$, some cosmologically interesting critical points describing late time accelerated evolution of the universe attracted by cosmological constant and accelerated scaling attractor in quintessence era have been found to alleviate coincidence problem.
description: Accept 16 pages, 8 figures