cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The inner view of NGC 1052 using multiple X-ray observations
Creators: name: Osorio-Clavijo, Natalia
name: González-Martín, Omaira
name: Papadakis, Iossif
name: Masegosa, Josefa
name: Hernández-García, Lorena
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper, we make a multi-epoch analysis of NGC 1052, one of the prototypical LLAGN, using XMM-Newton, Suzaku and NuSTAR observations, taken from 2001 to 2017. This is the first time that results from NuSTAR observations are reported for NGC 1052. On the technical aspects, we found a wavelength-dependent calibration issue between simultaneous XMM-Newton and NuSTAR spectra. It is described by a change on the photon index of $\rm{ Γ_{NuSTAR}- Γ_{XMM-Newton}=0.17\pm0.04}$. We use ancillary Chandra data to decontaminate the nuclear spectrum from circumnuclear contributors. We find that two baseline models can fit the broad (0.5-50 keV) X-ray spectrum of the source. One consists of a power-law like continuum which is absorbed by a uniform absorber, reflection from neutral material, and a separate power-law component in the soft band. The second model presents a clumpy absorber. The reflection component is still present, but not the soft band power-law. Instead, absorption by a warm absorber is necessary to fit the spectra. This is the first time that a reflection component is established in this object, thanks to high energy data from NuSTAR. This component is constant in flux and shape, supporting the idea that is produced away from the central source (probably the torus). We find flux, spectral slope and absorption variations on timescales of months to years. We also find that a patchy-absober can explain the behaviour of this source better as it is $\sim$ 200 times more likely than the uniform absober while it yields to smaller intrinsic variations.
description: 11 pages, 6 figures, 2 tables. Accepted for publication in MNRAS
Nealcidion sexguttatum Monne & Delfino 1986
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Nealcidion
Nealcidion sexguttatum

description: 45. Nealcidion sexguttatum Monné & Delfino, 1986
Type locality — Bolivia, La Paz: Coroico (Yungas de La Paz, Muduavi, 3000 m). (MNRJ). Distribution — Bolivia.
 Nealcidion sexguttatum Monné & Delfino, 1986: 169, fig. 3; Julio et al., 2000: 42 (holotype).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Electron-nuclear correlations for photo-induced dynamics in molecular dimers
Creators: name: Kilin, Dmitri S.
name: Pereversev, Yuri V.
name: Prezhdo, Oleg V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Ultrafast photoinduced dynamics of electronic excitation in molecular dimers is drastically affected by the dynamic reorganization of inter- and intra- molecular nuclear configuration modeled by a quantized nuclear degree of freedom [Cina et. al, J. Chem Phys. {118}, 46 (2003)]. The dynamics of the electronic population and nuclear coherence is analyzed by solving the chain of coupled differential equations for %mean coordinate, population inversion, electron-vibrational correlation, etc. [Prezhdo, Pereverzev, J. Chem. Phys. {113} 6557 (2000)]. Intriguing results are obtained in the approximation of a small change of the nuclear equilibrium upon photoexcitation. In the limiting case of resonance between the electronic energy gap and the frequency of the nuclear mode these results are justified by comparison to the exactly solvable Jaynes-Cummings model. It is found that the photoinduced processes in the model dimer are arranged according to their time scales: (i) fast scale of nuclear motion, (ii) intermediate scale of dynamical redistribution of electronic population between excited states as well as growth and dynamics of electron-nuclear correlation, (iii) slow scale of electronic population approach to the quasi-equilibrium distribution, decay of electron-nuclear correlation, and decrease of the amplitude of mean coordinate oscillation. The latter processes are accompanied by a noticeable growth of the nuclear coordinate dispersion associated with the overall nuclear wavepacket width. The demonstrated quantum relaxation features of the photoinduced vibronic dynamics in molecular dimers are obtained by a simple method, applicable to systems with many degrees of freedom.
A blazar as the likely counterpart to 4FGL J0647.7-4418 instead of a gamma-ray binary
Creators: name: Martí, Josep
name: Sánchez-Ayaso, Estrella
name: Luque-Escamilla, Pedro L.
name: Paredes, Josep M.
name: Bosch-Ramon, Valentí
name: Corbet, Robin H. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The persistent gamma-ray source 4FGL J0647.7-4418 is tentatively associated in the latest Fermi catalogue with the sub-dwarf O-type X-ray binary HD 49798. However, an AGN candidate is also mentioned as an alternative identification in updated versions of the catalogue accompanying paper. If the first association were correct, this would add HD 49798 to the handful of currently known gamma-ray binaries and, therefore, represent a significant breakthrough not only because of a new member addition, but also because of the apparent white dwarf companion in this system. Despite these perspectives, here we show that the stellar association is likely wrong and that the proposed AGN object, well inside the Fermi 95% confidence ellipse, is a more conceivable counterpart candidate to the Fermi source due to its strong blazar similarities.
description: 7 pages, 9 Figures, accepted for publication in MNRAS
A Hedonic Analysis of the Impact of LUST Sites on House Prices in Frederick, Baltimore, and Baltimore City Counties
Creators: name: Zabel, Jeffrey
name: Guignet, Dennis
name: Zabel, Jeffrey
name: Guignet, Dennis
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: LUST
subject: Hedonic Analysis
subject: Groundwater Contamination
subject: Remediation Benefits

description: Petroleum from leaking underground storage tanks (LUSTs) can contaminate local soil, and surface and groundwater. In some cases this can pose health risks to the surrounding population. Focusing on single family home sales from 1996-2007 in three Maryland counties, we use a hedonic house price model to estimate the willingness to pay to live father away from LUST sites. Particular attention is given to how property values are affected by leak and cleanup activity at a LUST site, the severity of contamination, the presence of a primary exposure path (i.e., private groundwater wells), and publicity surrounding a LUST site. The results suggest that although the typical LUST site may not significantly affect nearby property values, more publicized (and more contaminated sites) can impact surrounding home values by more than 10%.
celmech: A Python package for celestial mechanics
Creators: name: Hadden, Sam
name: Tamayo, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present celmech, an open-source Python package designed to facilitate a wide variety of celestial mechanics calculations. The package allows users to formulate and integrate equations of motion incorporating user-specified terms from the classical disturbing function expansion of the interaction potential between pairs of planets. The code can be applied, for example, to isolate the contribution of particular resonances to a system's dynamical evolution and develop simple analytical models with the minimum number of terms required to capture a particular dynamical phenomenon. Equations and expressions can be easily manipulated by leveraging the extensive symbolic mathematics capabilities of the sympy Python package. The celmech package is designed to interface seamlessly with the popular $N$-body code REBOUND to facilitate comparisons between calculation results and direct $N$-body integrations. The code is extensively documented and numerous example Jupyter notebooks illustrating its use are available online.
description: submitted to AAS Journals, code and example notebooks available at http://github.com/shadden/celmech ; documentation available at http://celmech.readthedocs.io
Neobaryssinus phalarus Monne & Martins 1976
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Neobaryssinus
Neobaryssinus phalarus

description: 3. Neobaryssinus phalarus Monné & Martins, 1976
Type locality — Brazil, Espírito Santo: Linhares. (MNRJ). Distribution — Brazil (Bahia, Espírito Santo).
 Neobaryssinus phalarus Monné & Martins, 1976: 81, fig. 37; Monné & Delfino, 1980: 319; Monné, 1990a: 264; Julio et al., 2000: 42 (holotype).
  Neoeutrypanus Monné, 1977
 Neoeutrypanus Monné, 1977: 685.
 Type­species — Eutrypanus nitidus White, 1855 (original designation).
 Eutrypanus; White, 1855: 371 (partim, not Erichson, 1847); Thomson, 1860: 13; 1864: 29, 356; Bates, 1864: 21; Lacordaire, 1872: 792 (partim).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Probing Free Nucleons with (Anti)neutrinos
Creators: name: Petti, R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a method to study free protons and neutrons using $ν(\bar ν)$-hydrogen (H) Charged Current (CC) inelastic interactions, together with various precision tests of the isospin (charge) symmetry using $ν$ and $\bar ν$ CC interactions on both H and nuclear targets. Probing free nucleons with (anti)neutrinos provides information about their partonic structure, as well as a crucial input for the modeling of $ν(\barν)$-nucleus (A) interactions. Such measurements can also represent a tool to address some of the limitations of accelerator-based neutrino scattering experiments on nuclear targets, originating from the combined effect of the unknown (anti)neutrino energy and of the nuclear smearing. We also discuss a method to impose constraints on nuclear effects and calibrate the (anti)neutrino energy scale in $ν(\bar ν)$-A interactions, which are two outstanding systematic uncertainties affecting present and future long-baseline neutrino experiments.
description: 15 pages, 6 figures. Prepared for proceedings of DIS 2022
An Error Analysis of the Geometric Baade-Wesselink Method
Creators: name: Marengo, Massimo
name: Karovska, Margarita
name: Sasselov, Dimitar D.
name: Sanchez, Mayly
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive an analytic solution for the minimization problem in the geometric Baade-Wesselink method. This solution allows deriving the distance and mean radius of a pulsating star by fitting its velocity curve and angular diameter measured interferometrically. The method also provide analytic solutions for the confidence levels of the best fit parameters, and accurate error estimates for the Baade-Wesselink solution. Special care is taken in the analysis of the various error sources in the final solution, among which the uncertainties due to the projection factor, the limb darkening and the velocity curve. We also discuss the importance of the phase shift between the stellar lightcurve and the velocity curve as a potential error source in the geometric Baade-Wesselink method. We finally discuss the case of the Classical Cepheid zeta Gem, applying our method to the measurements derived with the Palomar Testbed Interferometer. We show how a careful treatment of the measurement errors can be potentially used to discriminate between different models of limb darkening using interferometric techniques.
description: 24 pages, to be published on the Astrophysical Journal, vol. 603 March 2004
The Food Marketing Industries: Recent Changes and Prospects
Creators: name: Scott, Forrest E.
name: Hiemstra, Stephen J.
name: Scott, Forrest E.
name: Hiemstra, Stephen J.
Publisher: name: Unknown
Year: 1962
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: Rising consumer incomes and the movement of people from farms to cities have increased the demand for processed foods. Technological innovations have made these foods available at competitive prices. As a result, the output of processed food products in this country is growing faster than population. Greater average capacity per plant has enabled the increased output to be produced by a declining number of food processing plants and firms. Adoption of new technology has been a major force in reducing the number of plants and increasing the average size of plant. Many types of wholesalers move products from farmers to processors and retailers. These include firms that assemble and handle raw farm products, merchant wholesalers (including both general and specialty line grocery wholesalers), manufacturers' sales branches, brokers and agents. Assemblers of farm products increased their sales and the number of establishments from 1954 to 1958, after a decline from 1948 to 1954. In the wholesale grocery field, sales of general line merchant wholesalers affiliated with groups of retail food stores more than doubled from 1948 to 1958. This trend contrasts sharply with the decline in sales of the nonaffiliated general line grocery wholesalers. Total sales of grocery stores rose by three-fourths from 1948 to 1958, but the number of stores dropped by more than a fourth. Both chain and independent grocery stores decreased in number. The number of grocery stores with an annual sales volume of less than $100,000 declined sharply, but those grossing more than $1 million multiplied fourfold. Chains with 11 or more stores increased their share of total grocery store sales to 44 percent in 1958, up from 34 percent in 1948, and 33 percent in 1939. The most rapid growth was made by chains with 100 or fewer stores. In 1958 about two-fifths of total grocery store sales were made by stores that were members of retail groups either cooperatively owning a wholesale house or sponsored by a wholesaler. Thus, independent grocery stores not affiliated with a wholesaler had only about a fifth of total sales.
description: Article reprinted from The Marketing and Transportation Situation, February 1962
A Simulation Model for Pedestrian Crowd Evacuation Based on Various AI Techniques
Creators: name: Muhammed, Danial A.
name: Saeed, Soran A. M.
name: Rashid, Tarik A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Multiagent Systems (cs.MA)
subject: Artificial Intelligence (cs.AI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This paper attempts to design an intelligent simulation model for pedestrian crowd evacuation. For this purpose, the cellular automata(CA) was fully integrated with fuzzy logic, the kth nearest neighbors (KNN), and some statistical equations. In this model, each pedestrian was assigned a specific speed, according to his/her physical, biological and emotional features. The emergency behavior and evacuation efficiency of each pedestrian were evaluated by coupling his or her speed with various elements, such as environment, pedestrian distribution and familiarity with the exits. These elements all have great impacts on the evacuation process. Several experiments were carried out to verify the performance of the model in different emergency scenarios. The results show that the proposed model can predict the evacuation time and emergency behavior in various types of building interiors and pedestrian distributions. The research provides a good reference to the design of building evacuation systems.
description: 10 pages
IFOP Study of Public Opinion
Creators: name: Institut Francais D'Opinion Publique
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: France-Soir (1); Brittany Liberation Front (1); Boussois-Saint Gobain case (1); danger of world conflict (1); international problems (1); General de Gaulle's delivery of military equipment to Israel (2); Israel situation (2); regionalization and Senate reform (2); General de Gaulle for President (1); Mr. Couve de Murville (1); legislative elections (1).
The Spatial Extent of Water Quality Benefits in Urban Housing Markets
Creators: name: Walsh, Patrick
name: Milon, J. Walter
name: Scrogin, David
name: Walsh, Patrick
name: Milon, J. Walter
name: Scrogin, David
Publisher: name: Unknown
Year: 2010
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Hedonic pricing
subject: water quality
subject: pollution abatement
subject: proximity
subject: amenity value

description: Federal efforts are increasingly targeting surface water quality in urban watersheds throughout the U.S., as demonstrated by recent litigation between the EPA and the State of Florida. While the cost of achieving federal standards is ultimately borne by taxpayers, pollution abatement may generate diverse and wide-reaching taxable benefits. This study investigates the effects of enhanced water quality on property prices in urban housing markets. Hybrid specifications of hedonic price models employed in water quality and proximity valuation studies are estimated, and several hypotheses about the implicit value of water quality are tested. Findings indicate i) the value of increased water quality depends upon surface water size and declines rapidly as proximity to the waterfront diminishes, though the mean effect remains significant at several hundred meters; and ii) when housing density is considered, the aggregate benefits derived in the broader housing market may dominate those realized by waterfront homeowners.
Future complete vacuum spacetimes
Creators: name: Andersson, Lars
name: Moncrief, Vincent
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we prove a global existence theorem, in the direction of cosmological expansion, for sufficiently small perturbations of a family of spatially compact variants of the $k=-1$ Friedmann--Robertson--Walker vacuum spacetime. We use a special gauge defined by constant mean curvature slicing and a spatial harmonic coordinate condition, and develop energy estimates through the use of the Bel-Robinson energy and its higher order generalizations. In addition to the smallness condition on the data, we need a topological constraint on the spatial manifold to exclude the possibility of a non--trivial moduli space of flat spacetime perturbations, since the latter could not be controlled by curvature--based energies such as those of Bel--Robinson type. Our results also demonstrate causal geodesic completeness of the perturbed spacetimes (in the expanding direction) and establish precise rates of decay towards the background solution which serves as an attractor asymptotically.
description: 31 pages, latex, amsart
Insights from Physics into Development Processes: Are Fat Tails Interesting for Development Research?
Creators: name: Schultze, Uta
name: Schultze, Uta
Publisher: name: Unknown
Year: 2000
Subjects: subject: Research Methods/ Statistical Methods
subject: fat tails

description: This article explores the question of whether concepts and methods used in non-equilibrium statistical physics, already successfully applied in biology, epidemiology and finances, can also be a useful tool for research into economic development. The aim of this article is to describe one such phenomenon, the phenomenon of “fat tails”, for a multi-disciplinary public and to stimulate discussion on its potential use. The method is explained and empirically tested by looking at the example of the probability distribution of per capita GNP in various countries. It is shown that this distribution does indeed have “fat tails”. The significance of the appearance of such fat tails is discussed and it is stressed that they reflect a complex dynamic which cannot be captured using only mean values and variances. The article also suggests some other pertinent problems of development research where they may possibly be applied.
Leveraging Augmented Reality for Improved Situational Awareness During UAV-Driven Search and Rescue Missions
Creators: name: Nalamothu, Rushikesh
name: Sontha, Puneet
name: Karravula, Janardhan
name: Agrawal, Ankit
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In the high-stakes domain of search-and-rescue missions, the deployment of Unmanned Aerial Vehicles (UAVs) has become increasingly pivotal. These missions require seamless, real-time communication among diverse roles within response teams, particularly between Remote Operators (ROs) and On-Site Operators (OSOs). Traditionally, ROs and OSOs have relied on radio communication to exchange critical information, such as the geolocation of victims, hazardous areas, and points of interest. However, radio communication lacks information visualization, suffers from noise, and requires mental effort to interpret information, leading to miscommunications and misunderstandings. To address these challenges, this paper presents VizCom-AR, an Augmented Reality system designed to facilitate visual communication between ROs and OSOs and their situational awareness during UAV-driven search-and-rescue missions. Our experiments, focus group sessions with police officers, and field study showed that VizCom-AR enhances spatial awareness of both ROs and OSOs, facilitate geolocation information exchange, and effectively complement existing communication tools in UAV-driven emergency response missions. Overall, VizCom-AR offers a fundamental framework for designing Augmented Reality systems for large scale UAV-driven rescue missions.
description: 8 pages
Stationary states, dynamical stability, and vorticity of Bose-Einstein condensates in tilted rotating harmonic traps
Creators: name: Prasad, Srivatsa B.
name: Mulkerin, Brendan C.
name: Martin, Andrew M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We theoretically investigate a Bose-Einstein condensate confined by a rotating harmonic trap whose rotation axis is not aligned with any of its principal axes. The principal axes of the Thomas-Fermi density profiles of the resulting stationary solutions are found to be tilted with respect to those of the rotating trap, representing an extra degree of freedom that is associated with the existence of additional branches of stationary solutions for any given rotation axis alignment. By linearizing the time-dependent theory about the stationary states, we obtain a semi-analytical prediction of their dynamical instability at high rotation frequencies against collective modes arising from environmental perturbations. Comparing the stationary states to direct simulations of the Gross-Pitaevskii equation, we predict the nucleation of quantum vortices in the dynamically unstable rotational regime. These vortex lines are aligned along the rotation axis despite the tilting of the rotating trap although the background density profile is tilted with respect to the trapping and rotation axes.
description: 18 pages, 15 figures
NDE Netwerk Certificering - Handboek voor leden
Creators: name: Hartsuiker, Marjan
name: Steinmeier, Daniël
name: Steeman, Marjolein
name: van Veenendaal, Remco
name: Verburg, Maaike
name: van Zwol, Tamara
Publisher: name: Zenodo
Year: 2025
Subjects: network
certification

description: Dit handboek beschrijft de belangrijkste informatie rondom het NDE Netwerk Certificering voor leden en geïnteresseerden. Het NDE Netwerk Certificering is een samenwerkingsinitiatief van het Netwerk Digitaal Erfgoed (NDE) om directe interacties te faciliteren rondom het thema ‘certificering van digitale archieven’.  Het handboek beschrijft verdere doelen, focusgebieden en processen van het netwerk, en geeft informatie over hoe eraan deelgenomen kan worden.

Het NDE Netwerk Certificering is een initiatief van de expertgroep rondom de Wegwijzer Certificering. Naar aanleiding van verschillende evenementen en uitwisselingen binnen de Nederlandse digitale erfgoedgemeenschap rondom het onderwerp van certificering, is de duidelijke wens naar voren gekomen om naast de statische informatie en tips van de Wegwijzer Certificering ook een makkelijkere manier voor dynamische interactie en kennisdeling tot de beschikking te hebben.
Amazops Wilkinson & Reynolds & Jacobs 2021, gen. nov.
Creators: name: Wilkinson, Mark
name: Reynolds, Robert P.
name: Jacobs, Jeremy F.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Gymnophiona
Rhinatrematidae
Amazops

description: Amazops gen. nov. {urn:lsid:zoobank.org:act:D9F1C39D-4B47-46CF-AB9D-51896D4C619C} Diagnosis. Rhinatrematid caecilians with the squamosal contributing to the margin of the orbit. Content: A single species Amazops amazops, sp. nov., the type by monotypy and by designation. Etymology: The name is a portmanteau word combining reference to the Amazonian provenance of the type and only known species and the distinctive topological relationships of its eye and orbit, particularly the contribution of the squamosal to the bony margin of the orbit, which is unknown in any other rhinatrematid. As mandated by the code, gender is masculine. Remarks: Three other features of the only known specimen of this genus are distinctive, known in no other rhinatrematids and might be diagnostic for the genus:lack of contact between the quadrate and maxillopalatine, contact between the squamosal and frontal and the small number of annular grooves that are interrupted by the vent.
description: Published as part of Wilkinson, Mark, Reynolds, Robert P. & Jacobs, Jeremy F., 2021, A new genus and species of rhinatrematid caecilian (Amphibia: Gymnophiona: Rhinatrematidae) from Ecuador, pp. 27-34 in Herpetological Journal 31 (1) on page 28, DOI: 10.33256/31.1.2734, http://zenodo.org/record/5838883
Influence of vacancy defects in solid high-order harmonic generation
Creators: name: Pattanayak, Adhip
name: S., Mrudul M.
name: Dixit, Gopal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The present work discusses the impact of vacancy defects in solid high-order harmonic generation. The total energy cutoff of the high-order harmonic spectrum increases as a function of concentration of vacancy defects, and the total spectrum gradually turns into a single slanted spectrum without having an abrupt transition between primary and secondary plateaus. The spectral intensity of the below-band-gap harmonics in a solid with vacancy defects is enhanced significantly in comparison to the harmonics in a pristine solid. The changes in the harmonic spectra are understood in terms of their effective band structures. The presence of vacancy defects breaks the translational symmetry of the unit cell locally. As a consequence of this, new defect states appear, which open additional paths for the electron dynamics. The ill-resolved electron trajectories in the Gabor profile confirm the interference of additional paths. Moreover, the single slanted high-order harmonic spectrum carries a unique signature of vacancy defects in comparison to the high-order harmonic spectrum corresponding to solids with defects such as underdoping or overdoping.
description: 17 pages, 9 figures
On the Surface Pressure for the Edwards-Anderson Model
Creators: name: Contucci, Pierluigi
name: Graffi, Sandro
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences
subject: 82b44

description: For the Edwards-Anderson model we introduce an integral representation for the surface pressure (per unit surface) in terms of a quenched moment of the bond-overlap on the surface. We find upper and lower bounds uniformly in the volume and show that at high temperature its value is strictly different from zero.
description: Minor changes. To appear in Commun. Math. Phys
Entropy, holography and the second law
Creators: name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The geometric entropy in quantum field theory is not a Lorentz scalar and has no invariant meaning, while the black hole entropy is invariant. Renormalization of entropy and energy for reduced density matrices may lead to the negative free energy even if no boundary conditions are imposed. Presence of particles outside the horizon of a uniformly accelerated observer prevents the description in terms of a single Unruh temperature.
description: 4 pages, RevTex 4, 1 eps figure
Merger induced clump formation in distant infrared luminous starburst galaxies
Creators: name: Calabrò, Antonello
name: Daddi, Emanuele
name: Fensch, Jérémy
name: Bournaud, Frédéric
name: Cibinel, Anna
name: Puglisi, Annagrazia
name: Jin, Shuowen
name: Delvecchio, Ivan
name: D'Eugenio, Chiara
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: While the formation of stellar clumps in distant galaxies is usually attributed to gravitational violent disk instabilities, we show here that major mergers also represent a competitive mechanism to form bright clumps. Using ~0.1'' resolution ACS F814W images in the entire COSMOS field, we measure the fraction of clumpy emission in 109 main sequence (MS) and 79 Herschel-detected starbursts (off-MS) galaxies at 0.5 < z < 0.9, representative of normal versus merger induced star-forming activity, respectively. We additionally identify merger samples from visual inspection and from Gini-M20 morphological parameters. Regardless of the merger criteria adopted, the clumpiness distribution of merging systems is different from that of normal isolated disks at > 99.5 % confidence level, with the former reaching higher clumpiness values, up to 20 % of the total galaxy emission. We confirm the merger induced clumpiness enhancement with novel hydrodynamical simulations of colliding galaxies with gas fractions typical of z ~ 0.7. Multi-wavelength images of three starbursts in the CANDELS field support the young nature of clumps, which are likely merger products rather than older pre-existing structures. Finally, for a subset of 19 starbursts with existing near-IR rest frame spectroscopy, we find that the clumpiness is mildly anti-correlated with the merger phase, decreasing towards final coalescence. Our result can explain recent ALMA detections of clumps in hyperluminous high-z starbursts, while normal objects are smooth. This work raises a question on the role of mergers on the origin of clumps in high redshift galaxies in general.
description: 24 pages, 19 figures and 1 table ; Accepted for publication in Astronomy & Astrophysics
$n$-th parafermion $\mathcal{W}_N$ characters from $U(N)$ instanton counting on ${\mathbb {C}}^2/{\mathbb {Z}}_n$
Creators: name: Manabe, Masahide
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We propose, following the AGT correspondence, how the $\mathcal{W}^{\, para}_{N, n}$ ($n$-th parafermion $\mathcal{W}_N$) minimal model characters are obtained from the $U(N)$ instanton counting on ${\mathbb {C}}^2/{\mathbb {Z}}_n$ with $Ω$-deformation by imposing specific conditions which remove the minimal model null states.
description: 25 pages, 2 figures; v2: minor changes, references added; I would like to dedicate this paper to the memory of Professor Omar Foda
Nonlocal Subsystem Density Functional Theory
Creators: name: Mi, Wenhui
name: Pavanello, Michele
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By invoking a divide-and-conquer strategy, subsystem DFT dramatically reduces the computational cost of large-scale, \textit{ab-initio} electronic structure simulations of molecules and materials. The central ingredient setting subsystem DFT apart from Kohn-Sham DFT is the non-additive kinetic energy functional (NAKE). Currently employed NAKEs are at most semilocal (i.e., they only depend on the electron density and its gradient), and as a result of this approximation, so far only systems composed of weakly interacting subsystems have been successfully tackled. In this work, we advance the state-of-the-art by introducing fully nonlocal NAKEs in subsystem DFT simulations for the first time. A benchmark analysis based on the S22-5 test set shows that nonlocal NAKEs considerably improve the computed interaction energies and electron density compared to commonly employed GGA NAKEs, especially when the inter-subsystem electron density overlap is high. Most importantly, we resolve the long standing problem of too attractive interaction energy curves typically resulting from the use of GGA NAKEs.
“A Cellular Chronic Fatigue” - Dysregulated Mitochondrial Respiratory Function, Metabolic and Signalling Pathways in ME/CFS and the Identification of Blood Cell-Based Biomarkers of Disease
Creators: name: Missailidis, Daniel
Publisher: name: La Trobe
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Biomarkers

description: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the Department of Physiology, Anatomy and Microbiology, School of Life Sciences, College of Science, Health and Engineering, La Trobe University, Victoria, Australia.
GRIDS: Interactive Layout Design with Integer Programming
Creators: name: Dayama, Niraj
name: Todi, Kashyap
name: Saarelainen, Taru
name: Oulasvirta, Antti
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: H.5.2

description: Grid layouts are used by designers to spatially organise user interfaces when sketching and wireframing. However, their design is largely time consuming manual work. This is challenging due to combinatorial explosion and complex objectives, such as alignment, balance, and expectations regarding positions. This paper proposes a novel optimisation approach for the generation of diverse grid-based layouts. Our mixed integer linear programming (MILP) model offers a rigorous yet efficient method for grid generation that ensures packing, alignment, grouping, and preferential positioning of elements. Further, we present techniques for interactive diversification, enhancement, and completion of grid layouts (Figure 1). These capabilities are demonstrated using GRIDS1, a wireframing tool that provides designers with real-time layout suggestions. We report findings from a ratings study (N = 13) and a design study (N = 16), lending evidence for the benefit of computational grid generation during early stages of design.
description: 13 pages, 10 figures, ACM CHI 2020 Full Paper
Additional file 1 of Genome-wide discovery, and computational and transcriptional characterization of an AIG gene family in the freshwater snail Biomphalaria glabrata, a vector for Schistosoma mansoni
Creators: name: Lijun Lu
name: Loker, Eric
name: Zhang, Si-Ming
name: Buddenborg, Sarah
name: Lijing Bu
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 1: Figure S1. Genome-wide locations of AIG footprints in the B. glabrata BB02. The evolutionary footprints of AIG genes in B. glabrata contain three types: GIMAP (AIG gene with coiled-coil domain), AIG gene without coiled-coil domain, and partial AIG. Scaffold backbones were drawn with gray lines. Scaffolds longer than the figure region were marked with gray dots on left or right end of the gray lines. Genes on the forward strand were marked out using left-to-right arrows above scaffold lines, showing GIMAP genes (blue) and AIG genes (sky blue). Genes on the reverse strand were marked out using right-to-left arrows below scaffold lines, showing GIMAP genes (red) and AIG genes (pink). Partial AIGs (black) were showing on both forward and reverse strand. Scaffold IDs were labeled above each scaffold. Numbers in parenthesis after scaffold IDs are total number of AIG genes (with and without coiled-coils) on the scaffold. Gray parentheses enclosed genes within the same tandem array (no other genes in between).
Lambda-determinants and domino-tilings
Creators: name: Propp, James
Publisher: name: arXiv
Year: 2004
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A99

description: Consider the $2n$-by-$2n$ matrix $M=(m_{i,j})_{i,j=1}^{2n}$ with $m_{i,j} = 1$ for $i,j$ satisfying $|2i-2n-1|+|2j-2n-1| \leq 2n$ and $m_{i,j} = 0$ for all other $i,j$, consisting of a central diamond of 1's surrounded by 0's. When $n \geq 4$, the $λ$-determinant of the matrix $M$ (as introduced by Robbins and Rumsey) is not well-defined. However, if we replace the 0's by $t$'s, we get a matrix whose $λ$-determinant is well-defined and is a polynomial in $λ$ and $t$. The limit of this polynomial as $t \to 0$ is a polynomial in $λ$ whose value at $λ=1$ is the number of domino tilings of a $2n$-by-$2n$ square.
description: 4 pages; to appear in a special issue of Advances in Applied Mathematics honoring David P. Robbins
Regularization of energy-dependent pointlike interactions in 1D quantum mechanics
Creators: name: Granet, Etienne
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We construct a family of hermitian potentials in 1D quantum mechanics that converges in the zero-range limit to a $δ$ interaction with an energy-dependent coupling. It falls out of the standard four-parameter family of pointlike interactions in 1D. Such classification was made by requiring the pointlike interaction to be hermitian. But we show that although our Hamiltonian is hermitian for the standard inner product when the range of the potential is finite, it becomes hermitian for a different inner product in the zero-range limit. This inner product attributes a finite probability (and not probability density) for the particle to be exactly located at the position of the potential. Such pointlike interactions can then be used to construct potentials with a finite support with an energy-dependent coupling.
description: 19 pages
Optimal Border Policies for Invasive Species under Asymmetric Information
Creators: name: Fernandez, Linda
name: Sheriff, Glenn
name: Fernandez, Linda
name: Sheriff, Glenn
Publisher: name: Unknown
Year: 2010
Subjects: subject: International Relations/Trade
subject: Asymmetric Information
subject: Inspection
subject: International Trade
subject: Invasive Species

description: This paper analyzes border protection policies for managing risk of unintended imports of invasive species. Previous work typically assumes invasive species risk to be exogenous and commonly known. Here, we examine cases in which endogenous actions (exporter abatement) affect risk and allow for unobservable differences in exporter abatement cost. We show how the optimal inspection/penalty regime differs in such cases from that derived for homogeneous exporters. The information asymmetry also makes it optimal for the regulator to provide technical assistance grants even if it would be otherwise inefficient to do so. Further, we show that the fungibility of technical assistance with inputs in other sectors of the exporting economy significantly affects the qualitative nature of the optimal policy. If it has no outside value in the exporter’s country, the optimal policy is characterized by a menu of contracts trading off higher tariffs with lower penalties for being caught with an invasive. If technical assistance can be used in other sectors of the exporter’s economy, it introduces countervailing incentives that make it optimal for the regulator to use a uniform tariff/penalty combination for all exporters.
Cluster models of Lambda-Lambda-6He and Lambda-9Be hypernuclei
Creators: name: Filikhin, I.
name: Gal, A.
name: Suslov, V. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Configuration space Faddeev calculations are performed for the binding energy of Lambda-Lambda-6He and Lambda-9Be bound states, here considered as alpha-Lambda-Lambda and alpha-alpha-Lambda clusters respectively, in order to study the dependence of the calculated binding energy on the alpha-Lambda potential input. For Lambda-Lambda-6He, using realistic interactions, the uncertainty in extracting the Lambda-Lambda S=L=0 interaction strength does not exceed 0.1 MeV, which is a fraction of the order of magnitude derived for other theoretical uncertainties. For Lambda-9Be, the dependence of the calculated binding energy on the alpha-Lambda potential is considerably larger, of order 1 MeV. Our results for Lambda-9Be suggest that the odd-state alpha-Lambda interaction is substantially reduced with respect to the even-state component.
description: 16 pages, including 4 figures, typos corrected, slightly revised, accepted to Nuclear Physics A
Análisis de los índices de violencia familiar para la articulación de la familia y la juventud
Creators: name: Rodas, Jhon Jairo Mosquera
Publisher: name: figshare
Year: 2021
Subjects: subject: Sociology
subject: FOS: Sociology
subject: 139999 Education not elsewhere classified
subject: FOS: Educational sciences

description: Se parte de la pregunta ¿Cómo analizar la violencia familiar en la comuna Villavicencio articulando familia y juventud? El proyecto entonces está encaminado a analizar los factores de violencia familiar y como estos se armonizan con los procesos de desarrollo generacional para entender el papel de la familia y como ella misma puede redefinirse, relacionando este aspecto directamente con la posibilidad a mediano plazo de establecer proyectos de intervención comunitaria a partir de determinar aquellos factores de medición del índice de violencia familiar en la Comuna Villavicencio de la ciudad de Pereira e identificar las propuestas de intervención más efectivas para la intervención de los sectores críticos para así establecer los elementos posibles que contribuyan a la generación de las dimensiones donde se puede lograr generar espacios de convivencia y reconstrucción del tejido familiar.
An Elementary Treatment of the Reverse Sprinkler
Creators: name: Jenkins, Alejandro
Publisher: name: arXiv
Year: 2003
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Physics Education (physics.ed-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: We discuss the reverse sprinkler problem: How does a sprinkler turn when submerged and made to suck in water? We propose a solution that requires only a knowledge of mechanics and fluid dynamics at the introductory university level. We argue that as the flow of water starts, the sprinkler briefly experiences a torque that would make it turn toward the incoming water, while as the flow of water ceases it briefly experiences a torque in the opposite direction. No torque is expected when water is flowing steadily into it unless dissipative effects, such as viscosity, are considered. Dissipative effects result in a small torque that would cause the sprinkler arm to accelerate toward the steadily incoming water. Our conclusions are discussed in light of an analysis of forces, conservation of angular momentum, and the experimental results reported by others. We review the conflicting published treatments of this problem, some of which have been incorrect and many of which have introduced complications that obscure the basic physics involved.
description: 16 pages, 8 figures. The subject of this paper is often referred to in the literature as the "Feynman sprinkler" or the "Feynman inverse sprinkler." v2:references added, discussion of angular momentum conservation clarified, section III expanded to include consideration of dissipative phenomena such as viscosity. v3:minor corrections of style. To appear in the American Journal of Physics
Nonlinear self-interaction of plane gravitational waves
Creators: name: Servin, M.
name: Marklund, M.
name: Brodin, G.
name: Mendonca, J. T.
name: Cardoso, V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently Mendonca and Cardoso [Phys. Rev. D, vol. 66, 104009 (2002)] considered nonlinear gravitational wave packets propagating in flat space-time. They concluded that the evolution equation - to third order in amplitude - takes a similar form to what arises in nonlinear optics. Based on this equation, the authors found that nonlinear gravitational waves exhibit self-phase modulation and high harmonic generation leading to frequency up-shifting and spectral energy dilution of the gravitational wave energy. In this Brief Report we point out the fact - a possibility that seems to have been overlooked by Mendonca and Cardoso - that the nonlinear terms in the evolution equation cancels and, hence, that there is no amplitude evolution of the pulse. Finally we discuss scenarios where these nonlinearities may play a role.
description: 2 pages, to appear in Phys. Rev. D
Records management in the University of British Columbia and the University of Pennsylvania
Creators: name: Brown, Helen L.
name: Flank, Jessica
name: Grutchfield, Michael
Publisher: name: The University of British Columbia
Year: 2014

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”