cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Not too little, not too much: a theoretical analysis of graph (over)smoothing
Creators: name: Keriven, Nicolas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We analyze graph smoothing with \emph{mean aggregation}, where each node successively receives the average of the features of its neighbors. Indeed, it has quickly been observed that Graph Neural Networks (GNNs), which generally follow some variant of Message-Passing (MP) with repeated aggregation, may be subject to the oversmoothing phenomenon: by performing too many rounds of MP, the node features tend to converge to a non-informative limit. In the case of mean aggregation, for connected graphs, the node features become constant across the whole graph. At the other end of the spectrum, it is intuitively obvious that some MP rounds are necessary, but existing analyses do not exhibit both phenomena at once: beneficial ``finite'' smoothing and oversmoothing in the limit. In this paper, we consider simplified linear GNNs, and rigorously analyze two examples for which a finite number of mean aggregation steps provably improves the learning performance, before oversmoothing kicks in. We consider a latent space random graph model, where node features are partial observations of the latent variables and the graph contains pairwise relationships between them. We show that graph smoothing restores some of the lost information, up to a certain point, by two phenomenon: graph smoothing shrinks non-principal directions in the data faster than principal ones, which is useful for regression, and shrinks nodes within communities faster than they collapse together, which improves classification.
Thermodynamics of Magnetised Kerr-Newman Black Holes
Creators: name: Gibbons, G. W.
name: Pang, Yi
name: Pope, C. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The thermodynamics of a magnetised Kerr-Newman black hole is studied to all orders in the appended magnetic field $B$. The asymptotic properties of the metric and other fields are dominated by the magnetic flux that extends to infinity along the axis, leading to subtleties in the calculation of conserved quantities such as the angular momentum and the mass. We present a detailed discussion of the implementation of a Wald-type procedure to calculate the angular momentum, showing how ambiguities that are absent in the usual asymptotically-flat case may be resolved by the requirement of gauge invariance. We also present a formalism from which we are able to obtain an expression for the mass of the magnetised black holes. The expressions for the mass and the angular momentum are shown to be compatible with the first law of thermodynamics and a Smarr type relation. Allowing the appended magnetic field $B$ to vary results in an extra term in the first law of the form $-μdB$ where $μ$ is interpreted as an induced magnetic moment. Minimising the total energy with respect to the total charge $Q$ at fixed values of the angular momentum and energy of the seed metric allows an investigation of Wald's process. The Meissner effect is shown to hold for electrically neutral extreme black holes. We also present a derivation of the angular momentum for black holes in the four-dimensional STU model, which is ${\cal N}=2$ supergravity coupled to three vector multiplets.
description: 27 pages
A cusp-capturing PINN for elliptic interface problems
Creators: name: Tseng, Yu-Hau
name: Lin, Te-Sheng
name: Hu, Wei-Fan
name: Lai, Ming-Chih
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper, we propose a cusp-capturing physics-informed neural network (PINN) to solve discontinuous-coefficient elliptic interface problems whose solution is continuous but has discontinuous first derivatives on the interface. To find such a solution using neural network representation, we introduce a cusp-enforced level set function as an additional feature input to the network to retain the inherent solution properties; that is, capturing the solution cusps (where the derivatives are discontinuous) sharply. In addition, the proposed neural network has the advantage of being mesh-free, so it can easily handle problems in irregular domains. We train the network using the physics-informed framework in which the loss function comprises the residual of the differential equation together with certain interface and boundary conditions. We conduct a series of numerical experiments to demonstrate the effectiveness of the cusp-capturing technique and the accuracy of the present network model. Numerical results show that even using a one-hidden-layer (shallow) network with a moderate number of neurons and sufficient training data points, the present network model can achieve prediction accuracy comparable with traditional methods. Besides, if the solution is discontinuous across the interface, we can simply incorporate an additional supervised learning task for solution jump approximation into the present network without much difficulty.
To incorporate the concept of tourist experience in the tourism marketing
Creators: name: Almeida, Nicolau Miguel De
Publisher: name: Journal of Tourism & Development
Year: 2007

description: The tourist experience, together with its implication in tourism marketing, is an interesting matter within the tourism subject,considering the importance of that concept in the strategic orientation of marketing and tourist (consumer) behavior. The experiential information in marketing promotional stimuli (push factors) and tourist attractions (pull factors) are important sources of tourist information in the scope of tourism marketing. Then, the marketing management will be more focused on the experience than in the product or service. Being the experience capable of being translated into an event subjectively felt, which had not taken place yet, which integrates tangible and intangible aspects, its recognition on the level of tourism marketing leads to this theoretical and empirical research, in the assumption that the tourist has a motive (experience expectation). The practical contribution of this current research will allow us to find out if the choice of a tourism destination and a tourism business establishment is based on the experiences that the tourists wish to realize and if that establishment invests correctly in marketing.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Predicting Oxide Glass Properties with Low Complexity Neural Network and Physical and Chemical Descriptors
Creators: name: Bishnoi, Suresh
name: Badge, Skyler
name: Jayadeva
name: Krishnan, N. M. Anoop
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Due to their disordered structure, glasses present a unique challenge in predicting the composition-property relationships. Recently, several attempts have been made to predict the glass properties using machine learning techniques. However, these techniques have the limitations, namely, (i) predictions are limited to the components that are present in the original dataset, and (ii) predictions towards the extreme values of the properties, important regions for new materials discovery, are not very reliable due to the sparse datapoints in this region. To address these challenges, here we present a low complexity neural network (LCNN) that provides improved performance in predicting the properties of oxide glasses. In addition, we combine the LCNN with physical and chemical descriptors that allow the development of universal models that can provide predictions for components beyond the training set. By training on a large dataset (~50000) of glass components, we show the LCNN outperforms state-of-the-art algorithms such as XGBoost. In addition, we interpret the LCNN models using Shapely additive explanations to gain insights into the role played by the descriptors in governing the property. Finally, we demonstrate the universality of the LCNN models by predicting the properties for glasses with new components that were not present in the original training set. Altogether, the present approach provides a promising direction towards accelerated discovery of novel glass compositions.
description: 15 pages, 3 figures
Modeling Structural Colors from Disordered One-Component Colloidal Nanoparticle-based Supraballs using Combined Experimental and Simulation Techniques
Creators: name: Patil, Anvay
name: Heil, Christian M.
name: Vanthournout, Bram
name: Singla, Saranshu
name: Hu, Ziying
name: Ilavsky, Jan
name: Gianneschi, Nathan C.
name: Shawkey, Matthew D.
name: Sinha, Sunil K.
name: Jayaraman, Arthi
name: Dhinojwala, Ali
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Bright, saturated structural colors in birds have inspired synthesis of self-assembled, disordered arrays of assembled nanoparticles with varied particle spacings and refractive indices. However, predicting colors of assembled nanoparticles, and thereby guiding their synthesis, remains challenging due to the effects of multiple scattering and strong absorption. Here, we use a computational approach to first reconstruct the nanoparticles' assembled structures from small-angle scattering measurements and then input the reconstructed structures to a finite-difference time-domain method to predict their color and reflectance. This computational approach is successfully validated by comparing its predictions against experimentally measured reflectance and provides a pathway for reverse engineering colloidal assemblies with desired optical and photothermal properties.
description: 14 pages, 3 figures, 1 ToC figure
Description of 158Er at ultrahigh spin in nuclear density functional theory
Creators: name: Afanasjev, A. V.
name: Shi, Yue
name: Nazarewicz, W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Rotational bands in $^{158}$Er at ultra-high spin have been studied in the framework of relativistic and non-relativistic nuclear density functional theories. Consistent results are obtained across the theoretical models used but some puzzles remain when confronted with experiment. Namely, the many-body configurations which provide good description of experimental transition quadrupole moments and dynamic moments of inertia require substantial increase of the spins of observed bands as compared with experimental estimates, which are still subject to large uncertainties. If, however, the theoretical spins assignments turned out to be correct, the experimental band 1 in $^{158}$Er would be the highest-spin structure ever observed.
description: 6 pages, 4 figures
“Local people” a critical factor for place brand building
Creators: name: Freire, João Ricardo
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Branding has become one of the most powerful tools in marketing strategy and its application has reached undreamed of areas.There has been a general agreement amongst academics and practitioners that places can be branded in the same way as consumer goods and services. However, destination branding is a relatively new concept and there is a lack of empirical academic research on the topic. It can be assumed the place brands will have some unique characteristics that are quite different from products or services. This exploratory research reveals that local people are relevant and important for a destination brand building process. Consumers use this factor to evaluate differences in destinations and to support their decisions about tourism consumption. It can be concluded that much of a destination’s image is likely to be created by stereotyping the “typical” local people.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Additional file 1 of The district operation centres in one of the largest local health authorities in Italy to manage COVID-19 surveillance and homecare: first implementation and results of a survey addressed to general practitioners
Creators: name: Frisicale, Emanuela Maria
name: Barbara, Andrea
name: Perilli, Alessio
name: Carini, Elettra
name: Grossi, Adriano
name: Simonetti, Leonardo
name: Tammam, Giulia
name: Axelrod, Svetlana
name: Tanese, Angelo
name: Goletti, Mauro
name: Parente, Paolo
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Biological Sciences not elsewhere classified
Cancer
Science Policy

description: Supplementary Material 1
The cultural tourism market in Portugal
Creators: name: Fernandes, Carlos
name: Silva, Goretti
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Tourism is increasingly offering a range of cultural products, from visiting monuments and traditional arts and crafts centres, to participating in historical events and discovering unique lifestyles. Tourism creates an interest in these particular forms of culture, often encouraging the preservation of cultural and historical traditions, contributing to the protection of cultural heritage and to a renaissance of local cultures, cultural arts and crafts. The relationship between tourism and the cultural sector is potentially highly complementary. The cultural sector creates attractions for the tourist while tourism supplies extra audiences for cultural events and activities. Market segmentation coupled with target marketing is on the increase and cultural tourism could prove a worthwhile sector (Tighe, 1985). Because culture is the key and many times the primary reason for visiting certain tourist destinations, since 1992 the Association for Tourism and Leisure Education (ATLAS) has conducted surveys and acted as a Eurobarometer for cultural tourism in Europe (see www.geocities.com/atlasproject2004). ATLAS is an international association of higher education institutions and other organisations that promote transnational teaching and research of tourism, leisure and related subjects (www.atlas-euro.org). ATLAS carried out a worldwide survey in 2004, designed to gather information on the visitors to cultural events and attractions, including their holiday motivations, socio-demographic profiles and consumption patterns. In Portugal, the survey was carried out by several partners, under the coordination of the Laboratory of Tourism of the Polytechnic Institute of Viana do Castelo. This paper sets out to establish a profile of the cultural tourist in Portugal, based on the ATLAS survey at a wide range of different sites and types of attractions and locations in six of the seven tourism promotional regions of Portugal. The partners that took part in this survey were all volunteers. The Azores was the only region in which the survey was not conducted. Several local organisations were contacted, but none volunteered.
description: Journal of Tourism & Development, n.º 7/8 (2007)
A review on architecture with fungal biomaterials: the desired and the feasible
Creators: name: Almpani-Lekka, Dimitra
name: Pfeiffer, Sven
name: Schmidts, Christian
name: Seo, Seung-Il
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 700 Künste und Unterhaltung::720 Architektur::720 Architektur
subject: architecture
subject: bio materials
subject: digital planning processes
subject: fungal architecture

description: Fungal biomaterials are becoming increasingly popular in the fields of architecture and design, with a significant bloom of projects having taken place during the last 10 years. Using mycelium as a stabilizing compound for fibers from agricultural waste, new building elements can be manufactured according to the circular economy model and be used for architectural construction to transform the building industry towards an increased environmental and economic sustainability. Simultaneously, research on those materials and especially fungal biocomposites is producing knowledge that allows for the materials themselves to inspire and transform the architectural design. Novel research on those materials is not only allowing for their use as construction materials, but it inspires and affects the architectural design process through the discovery and variation of the materials’ properties. Today, many interdisciplinary teams are working on this emerging field to integrate fungal biocomposites in the construction industry and to merge science, art, and architecture responsibly. This study provides an overview of the progress that has been made in this field during the last 10 years, focusing on six works that are presented in more detail. Those six works are spaces at an architectural scale which showcase unique elements and innovative aspects for the use of fungal biomaterials in architecture. Each work has followed different design strategies, different fabrication methods, or different post-processing methods. All of them together have produced significant technical knowledge as well as a cultural impact for the field of architecture but also for the field of fungal biotechnology.
Soil moisture estimation from Sentinel-1 interferometric observations over arid regions
Creators: name: Karamvasis, Kleanthis
name: Karathanassi, Vassilia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: Geophysics (physics.geo-ph)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: We present a methodology based on interferometric synthetic aperture radar (InSAR) time series analysis that can provide surface (top 5 cm) soil moisture (SSM) estimations. The InSAR time series analysis consists of five processing steps. A co-registered Single Look Complex (SLC) SAR stack as well as meteorological information are required as input of the proposed workflow. In the first step, ice/snow-free and zero-precipitation SAR images are identified using meteorological data. In the second step, construction and phase extraction of distributed scatterers (DSs) (over bare land) is performed. In the third step, for each DS the ordering of surface soil moisture (SSM) levels of SAR acquisitions based on interferometric coherence is calculated. In the fourth step, for each DS the coherence due to SSM variations is calculated. In the fifth step, SSM is estimated by a constrained inversion of an analytical interferometric model using coherence and phase closure information. The implementation of the proposed approach is provided as an open-source software toolbox (INSAR4SM) available at www.github.com/kleok/INSAR4SM. A case study over an arid region in California/Arizona is presented. The proposed workflow was applied in Sentinel- 1 (C-band) VV-polarized InSAR observations. The estimated SSM results were assessed with independent SSM observations from a station of the International Soil Moisture Network (ISMN) (RMSE: 0.027 $m^3/m^3$ R: 0.88) and ERA5-Land reanalysis model data (RMSE: 0.035 $m^3/m^3$ R: 0.71). The proposed methodology was able to provide accurate SSM estimations at high spatial resolution (~250 m). A discussion of the benefits and the limitations of the proposed methodology highlighted the potential of interferometric observables for SSM estimation over arid regions.
Tourism marketing and management: the case of Pousadas vs. Solares of Portugal
Creators: name: Lemos, Fernando Florim De
name: Farhangmehr, Minoo
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Profound changes in contemporary society are driving Public Administration towards a constant revamping of solutions for answering the needs of consumers. Marketing and Marketing Strategy are playing a more prominent role in the modus operandi of public organisations. In the context of Public Administration modernisation, a study was developed in 2003, considering two tourist products: Pousadas, under the domain of the public sector, Enatur; and Solares, a private entity associated with Turihab – Tourism Lodging Association. The study sought to identify the similarities and differences surrounding the marketing and corresponding strategies between Pousadas and Solares by exploring the ideas and opinions expressed by Solares owners and Pousada directors. The study was carried out through the administration of a questionnaire preceded with interviews with key people in the tourism area. Results showed similarities and differences in the strategies adopted by each of the different organisations reflecting their objectives and intrinsic characteristics.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Obtaining high degree of circular polarization at X-ray FELs via a reverse undulator taper
Creators: name: Schneidmiller, E. A.
name: Yurkov, M. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Baseline design of a typical X-ray FEL undulator assumes a planar configuration which results in a linear polarization of the FEL radiation. However, many experiments at X-ray FEL user facilities would profit from using a circularly polarized radiation. As a cheap upgrade one can consider an installation of a short helical (or cross-planar) afterburner, but then one should have an efficient method to suppress powerful linearly polarized background from the main undulator. In this paper we propose a new method for such a suppression: an application of the reverse taper in the main undulator. We discover that in a certain range of the taper strength, the density modulation (bunching) at saturation is practically the same as in the case of non-tapered undulator while the power of linearly polarized radiation is suppressed by orders of magnitude. Then strongly modulated electron beam radiates at full power in the afterburner. Considering SASE3 undulator of the European XFEL as a practical example, we demonstrate that soft X-ray radiation pulses with peak power in excess of 100 GW and an ultimately high degree of circular polarization can be produced. The proposed method is rather universal, i.e. it can be used at SASE FELs and seeded (self-seeded) FELs, with any wavelength of interest, in a wide range of electron beam parameters, and with any repetition rate. It can be used at different X-ray FEL facilities, in particular at LCLS after installation of the helical afterburner in the near future.
Image measure and formation in rural-cultural tourism: measuring the emotional dimension based on emotional response in Situ
Creators: name: Vela, Marcelo Royo
name: Tarrés, Christian Serarols
Publisher: name: Journal of Tourism & Development
Year: 2007

description: The concept and the measure of the Image of Tourist Destinations (ITD) have two different dimensions, the cognitive and affective component that can be measured using different techniques. This work offers a new approach regarding the image’s formation of rural-cultural destinations and its measure. The main result observed in this empirical research, both qualitative and quantitative, is the convenience of adopting a more analytical and integrated approach when we consider and measure the emotional component of the image. Furthermore, the results of the exploratory and factorial analysis show the factors that integrate cognitive variables and emotional response in the same factor, besides, the emotional aggregated component of the image has very low variance and reliability. Finally, we discuss some implications of the formation’s model and the development of a reliable and valid scale of measuring image.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Electronic structures and stability investigation of the new class of large band gap topological insulators MTl$_4$Te$_3$ (M = Cd, Hg)
Creators: name: Li, Ying
name: Xu, Gang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By means of ternary chemical potential phase diagram and phonon spectrum calculations, we propose that $M$Tl$_4$Te$_3$ ($M$ = Cd, Hg), the derivatives of Tl$_5$Te$_3$, are thermodynamically and dynamically stable in the body centered tetragonal crystal structure with $I$4/$mcm$ symmetry. Our electronic structures calculations confirm that a robust $s$-$p$ band inversion occurs near the Fermi level in $M$Tl$_4$Te$_3$, and a topological band gap about 0.13 eV in CdTl$_4$Te$_3$ is induced by the spin-orbit coupling. These results suggest that $M$Tl$_4$Te$_3$ are a new class of large band gap 3D strong topological insulators that are stable and synthesizable in experiments, which could be used to design efficient spin torque equipment and spin device.
description: 8 pages, 4 figures. Accepted by Physical Review Materials
Stakeholders in rural tourism policy and planning: local access forums
Creators: name: Hall, Bronia
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Rural tourism policy and planning in the UK takes place in a fragmented manner through a number of separate sectors, but the method of funding local authorities means that they are in control of implementation at local level. The Countryside and Rights of Way Act 2000 was responsible for the creation of Local Access Forums before August 2003, each of which is now required to advise the access authorities regarding the implementation of the legislation. Through participant observation of 4 recently formed Local Access Forums and comparison of the findings with previous research, this paper examines the continuing contribution of stakeholders involved in decision making processes and the lessons that have been learned in the first year of existence. The research contributes to the debate over the nature, outcomes and extent of stakeholder participation that is generated through this process.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Hiking as a recreational and tourist activity – comparing portuguese hikers with those from other nationalities
Creators: name: Rodrigues, Áurea
name: Kastenholz, Elisabeth
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Hiking has been identified as an important recreational and tourist activity in many countries. In Portugal, however, there are not many well developed opportunities for hiking, since the activity is not very common amongst the population and has not been discovered yet as a potential for tourism development. However, a system ofwell designed walking paths may be an interesting and relatively inexpensive infrastructure, attracting visitors to natural, rural and mountain areas, making corresponding heritage of these areas more accessible and visible and thereby motivating visitors to stay for longer periods of time. The walking paths’ success should largely depend on the capacity of those responsible for their management in promoting their usage amongst residents and tourists, as well as in supervising visitor flows and behaviours. This should be enhanced by the understanding of these visitors’ profiles, desires and behaviours related to nature. In the present study, we show the results of an exploratory survey of Portuguese and foreign hikers (N=200), whose distinct interests and needs that may be accommodated by specific developments of walking paths and associated tourism products.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Hadron Structure in Chiral Perturbation Theory
Creators: name: Aleksejevs, A.
name: Barkanova, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present our predictions for meson form factors for the SU(3) octet and investigate their impact on the pion electroproduction cross sections. The electric and magnetic polarizabilities of the SU(3) octet of mesons and baryons are analyzed in detail. These extensive calculations are made possible by the recent implementation of semi-automatized calculations in fully-relativistic chiral perturbation theory, which allows evaluation of polarizabilities from Compton scattering up to next-to-the-leading order.
description: 9 pages, proceedings for Hadron Structure 13
Rotational Dynamics and Angular Locking of Nanoparticles at liquid Interfaces
Creators: name: Razavi, Sepideh
name: Kretzschmar, Ilona
name: Koplik, Joel
name: Colosqui, Carlos E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nanoparticles with different surface morphologies that straddle the interface between two immiscible liquids are studied via molecular dynamics simulations. The methodology employed allows us to compute the interfacial free energy at different angular orientations of the nanoparticle. Due to their atomistic nature, the studied nanoparticles present both microscale and macroscale geometrical features and cannot be accurately modeled as a perfectly smooth body (e.g., spheres, cylinders). Under certain physical conditions, microscale features can produce free energy barriers that are much larger than the thermal energy of the surrounding media. The presence of these energy barriers can effectively "lock" the particle at specific angular orientations with respect to the liquid-liquid interface. This work provides new insights on the rotational dynamics of Brownian particles at liquid interfaces and suggests possible strategies to exploit the effects of microscale features with given geometric characteristics.
Classical Gravitational Observables from the Eikonal Operator
Creators: name: Di Vecchia, Paolo
name: Heissenberg, Carlo
name: Russo, Rodolfo
name: Veneziano, Gabriele
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observables. In the first proposal, only genuinely propagating gravitons are included, while, in the second, zero-frequency modes are added in order to recover the effects of a static gravitational field. We first calculate the radiated energy-momentum and the change in each particle's momentum, or impulse, to 3PM order finding agreement with the literature. We then calculate the angular momentum of the gravitational field after the collision. In order to do so, we adapt the method of reverse unitarity to the presence of derivatives in the operators describing the angular momentum and reproduce the result of~\cite{Manohar:2022dea} obtained by resumming the small-velocity expansion. As a new application, we derive also the variation in each particle's angular momentum up to 3PM: calculating separately field and particle contributions allows us to check the balance laws explicitly. We also show how the eikonal operator encodes the linear-response formula of Bini-Damour by deriving the linear radiation-reaction contribution to the transverse impulse at 4PM.
description: 22 pages
Logarithmic Exotic Conformal Galilean Algebras
Creators: name: Henkel, Malte
name: Hosseiny, Ali
name: Rouhani, Shahin
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Logarithmic representations of the conformal Galilean algebra (CGA) and the Exotic Conformal Galilean algebra ({\sc ecga}) are constructed. This can be achieved by non-decomposable representations of the scaling dimensions or the rapidity indices, specific to conformal galilean algebras. Logarithmic representations of the non-exotic CGA lead to the expected constraints on scaling dimensions and rapidities and also on the logarithmic contributions in the co-variant two-point functions. On the other hand, the {\sc ecga} admits several distinct situations which are distinguished by different sets of constraints and distinct scaling forms of the two-point functions. Two distinct realisations for the spatial rotations are identified as well. The first example of a reducible, but non-decomposable representation, without logarithmic terms in the two-point function is given.
description: 29 Pages, no figs
title: Zwei Artikel aus der "Deutschen Zeitung"; [1848]
title: I. Der leitende Artikel in Nr. 149 ; II. "Von der Ostsee" in der Beilage zu Nr. 159
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Titel von I: Deutschland in Frankfurt und Deutschland in Schleswig Holstein
Coastal tourism in natural parks. An analysis of demand profiles and recreational uses in coastal protected natural areas
Creators: name: Anton-Clavé, Salvador
name: Nel.Lo, Marta Gemma
name: Orellana, Alicia
Publisher: name: Journal of Tourism & Development
Year: 2007

description: The main objective of this communication is to show that the tourist and recreational uses made of a protected area, such as the Ebro Delta Natural Park, that is located on the coast in a context of “sun and beach” tourism present certain particularities due to the fact that a significant portion of the demand is motivated less by aspects such as the area’s natural assets than by classic draws such as sunbathing or the beach. In order to test this hypothesis, a typology of the visitors to the Ebro Delta Natural Park was established, with regard to both their tourist profiles and the characteristics of their trip. An analysis of the results further allowed us to determine the uses made of, and behaviour shown in relation to, the park’s natural assets by the different visitor types found, as well as to verify differences in their perceptions and satisfaction levels.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Additional file 1 of Changes in tibial cortical dimensions and density associated with long-term locking plate fixation in goats
Creators: name: Bowers, Kristin M.
name: Terrones, Lori D.
name: Sun, Xiaocun
name: Rifkin, Rebecca
name: Croy, Elizabeth
name: Adair, Henry S.
name: Mulon, Pierre-Yves
name: Hecht, Silke
name: Anderson, David E.
Publisher: name: figshare
Year: 2023
Subjects: subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: Additional file 1: Supplemental Table 1. Plate length distribution between study groups. Selected plate lengths were significantly different between Study A and Study B (p<0.001).
Toda lattice with constraint of type B
Creators: name: Krichever, I.
name: Zabrodin, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We introduce a new integrable hierarchy of nonlinear differential-difference equations which is a subhierarchy of the 2D Toda lattice defined by imposing a constraint to the Lax operators of the latter. The 2D Toda lattice with the constraint can be regarded as a discretization of the BKP hierarchy. We construct its algebraic-geometrical solutions in terms of Riemann and Prym theta-functions.
description: 24 pages, 1 figure
Analysis of a brazilian tourist destination under the focus of sustainability
Creators: name: Souza, Maria José Brabosa De
name: Ferreira, Elaine
name: Souza, Carlos Alberto Barbosa De
Publisher: name: Journal of Tourism & Development
Year: 2007

description: Tourism development in Brazil is a viable and economic alternative for job creation and revenue as long as the country can rely on human resources training and a business community integrated with the public sector to attract visitors through the quality of infrastructure and services. The aim of this study was the analysis of tourist flow in a given Brazilian city and the visitor’s view on the quality of infrastructure and tourist attractions. An official data base was used and a survey with 172 tourists performed. The research revealed a fluctuation in the tourist flow - causing economic and social unsustainability - and a lack of quality in the overall services according to the tourist’s opinion,such as safety, urban and beach cleanliness, tourist information, commercial centers and tours. Integration between government, private sector and agencies promoting tourism is the key to improve the quality of the overall services.
description: Journal of Tourism & Development, n.º 7/8 (2007)
A Reduction to Binary Approach for Debiasing Multiclass Datasets
Creators: name: Alabdulmohsin, Ibrahim
name: Schrouff, Jessica
name: Koyejo, Oluwasanmi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.6; I.2.10

description: We propose a novel reduction-to-binary (R2B) approach that enforces demographic parity for multiclass classification with non-binary sensitive attributes via a reduction to a sequence of binary debiasing tasks. We prove that R2B satisfies optimality and bias guarantees and demonstrate empirically that it can lead to an improvement over two baselines: (1) treating multiclass problems as multi-label by debiasing labels independently and (2) transforming the features instead of the labels. Surprisingly, we also demonstrate that independent label debiasing yields competitive results in most (but not all) settings. We validate these conclusions on synthetic and real-world datasets from social science, computer vision, and healthcare.
description: 18 pages, 5 figures
A Negative Long Lag from the Optical to the UV Continuum in Fairall 9
Creators: name: Yao, Philippe Z.
name: Secunda, Amy
name: Jiang, Yan-Fei
name: Greene, Jenny E.
name: Villar, Ashley
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the detection of a long-timescale negative lag, where the blue bands lag the red bands, in the nearby Seyfert 1 galaxy Fairall 9. Active Galactic Nuclei (AGN) light curves show variability over a wide range of timescales. By measuring time lags between different wavelengths, the otherwise inaccessible structure and kinematics of the accretion disk can be studied. One common approach, reverberation mapping, quantifies the continuum and line lags moving outwards through the disk at the light-travel time, revealing the size and temperature profile of the disk. Inspired by numerical simulations, we expect longer lags to exist in AGN light curves that travel inward on longer timescales, tracing the accretion process itself. By analyzing AGN light curves in both temporal and frequency space, we report the detection of long-timescale lags ($\sim -70$ days) in Fairall 9 which propagate in the opposite direction to the reverberation lag. The short continuum lag ($<10$ days) is also detected and is consistent with reverberation lags reported in the literature. When fitting the longer lag as a function of frequency with a model motivated by the thin disk model, we find that the disk scale height likely increases outward in the disk. This detection raises the exciting prospect of mapping accretion disk structures across a wide range of AGN parameters.
description: 24 pages, 14 figures, submitted to ApJ
Universal truncation error upper bounds in irregular sampling restoration
Creators: name: Olenko, Andriy
name: Pogány, Tibor K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94A20, 26D15 (Primary), 30D15, 41A05(Secondary)

description: Universal (pointwise uniform and time shifted) truncation error upper bounds are presented in Whittaker--Kotel'nikov--Shannon (WKS) sampling restoration sum for Bernstein function class $B_{π,d}^q\,,\ q \ge 1,$ $d\in \mathbb N\,,$ when the sampled functions decay rate is unknown. The case of multidimensional irregular sampling is discussed.
description: 13 pages. This is an Author's Accepted Manuscript of an article published in the Applicable Analysis, Vol.90, No. 3-4. (2011), 595--608. [copyright Taylor & Francis], available online at: http://www.tandfonline.com/ [DOI:10.1080/00036810903437754]
The contribution of tourism to Growth: lessons from the Azores and Madeira
Creators: name: Fortuna, Mário
name: Vieira, José Cabral
Publisher: name: Journal of Tourism & Development
Year: 2007

description: The Azores and Madeira are two regions of Portugal, both considered as ultra-peripheral regions of the European Union. The islands were granted a considerable level of autonomy in 1976 and have, since, devised their own development policies. In the last twenty years, tourism has played a completely different role in these islands. In both cases, development strategies were, to a great extent, based on activities that were traditionally strong in the islands and exhibited good competitive conditions. The Azores opted for the development of activities in agriculture, while Madeira opted for a strategy of tourism development.The purpose of the current paper is to establish a comparison of the economic growth that occurred in each of these regions and to try to explore the correlations that might be made between the results obtained and the strategic options made. The comparison is based on the statistics that characterize the main economic sectors in each region, namely in what regards contributions to employment, GDP and exports. The results of a simple econometric model of GDP and employment impacts are also presented.
description: Journal of Tourism & Development, n.º 7/8 (2007)
Putting the Diffuse Interstellar Bands on the map - literally!
Creators: name: van Loon, Jacco Th.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches - globular clusters (in particular omega Centauri), nearby stars in and around the Local Bubble, and stars within the Magellanic Clouds. I describe the results so far obtained and our current experiments.
description: Talk presented at IAU Symposium 297 "The Diffuse Interstellar Bands", CUP proceedings editors: Jan Cami and Nick Cox
Ensayo:  "Las Ciencias Políticas Y Las Relaciones Internacionales", 2 Disciplinas... 1 Profesión...
Creators: name: Masís, Héctor
Publisher: name: Zenodo
Year: 2025
Subjects: Ciencias Políticas y Relaciones Internacionales

description: Esta carrera profesional de estudios en Ciencias Políticas y Relaciones Internacionales destaca, por contener una bien acertada combinación y un equilibrado balance, de todo lo más preponderante que se encuentra presente en cada una de estas dos disciplinas por separado, para así terminar dejándolas perfectamente vinculadas entre sí, en todo aquello cuanto ambas convergen de manera intrínseca y forma implícita, complementandose con todo esto mutuamente la una con la otra, en completa armonía y total correspondencia con las actuales demandas formativas, derivadas a su vez de las mismas exigencias en el desempeño profesional de hoy día, el cual, inmerso dentro de un mundo eminentemente internacionalizado, se mantiene en un constante acelerado cambio y por ende rápida evolución permanente también, como producto de haber arribado la humanidad a tal punto de avance científico en nuestra era digital de la Informática, y de pertenecer ahora ésta a una nueva sociedad, como es la “Sociedad del Conocimiento del s. XXI” en que ahora vivimos.
Universal derivation of the asymptotic charges of bosonic massless particles
Creators: name: Nguyen, Kevin
name: West, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a unified treatment of the conserved asymptotic charges associated with any bosonic massless particle in any spacetime dimension. In particular we provide master formulae for the asymptotic charges and the central extensions in the corresponding charge algebras. These formulae can be explicitly evaluated for any given theory. For illustration we apply them to electromagnetism and gravity, thereby recovering earlier results.
description: 9 pages, References added and commented on
Explicit attacks on BB84 with distinguishable photons
Creators: name: Babukhin, D.
name: Kronberg, D.
name: Sych, D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Distinguishability of photons in non-operational degrees of freedom compromises unconditional security of quantum key distribution since an eavesdropper can improve attack strategies by exploiting this distinguishability. However, the optimal eavesdropping strategies in the presence of light source side channels are not known. Here we provide several explicit attack strategies on the BB84 protocol with partially distinguishable photons. In particular, we consider the phase-covariant cloning attack, which is optimal in the absence of side channels, and show that there are even better strategies in the presence of side channels. The improved strategies exploit a measurement of the side channel state followed by an attack on the signal photon. Our results explicitly demonstrate reduction of the critical error rate, and set an upper bound on the practical secret key rate.
description: Comments welcome
Environmental Management in Hotel Units of the Province of Huelva (Spain)
Creators: name: Sánchez, Alfonso Vargas
name: Acosta, Rosa Maria Vaca
name: Camacho, Elena García De Soto
Publisher: name: Journal of Tourism & Development
Year: 2007

description: In this paper, the characterization of the hotels located in the Spanish province of Huelva was carried out from three points of view. First, the level of development of their systems of environmental management; secondly, the vision that the people in charge of these units have of the consequences of environmental measures on the competitiveness of the company, and finally, the managers’ perception of the influence of a series of factors which pressurized the adoption of these environmental measures. The possible link among these three elements is also treated, and a statistically significant and strong (positive) relation between the level of development of environmental management systems and the level of pressure exerted by the determining factors of the environmental preoccupation of the company was found. This did not happen with the perception of the relation company-environment. The control variables, category, type of location and size of the hotel which were considered, do not seem to condition these co-relations. The methodology used includes a univariable, bivariable and multivariable statistical treatment.
description: Journal of Tourism & Development, n.º 7/8 (2007)