cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
La tipologia de las explotaciones en funcion de su viabilidad economica y demografica: aplicacion a las explotaciones de bovino en Galicia
Creators: name: Garcia, Francisco Sineiro
name: Iglesias, Edelmiro Lopez
name: Fernandez, Roberto Lorenzana
name: Pacos, Bernardo Valdes
name: Garcia, Francisco Sineiro
name: Iglesias, Edelmiro Lopez
name: Fernandez, Roberto Lorenzana
name: Pacos, Bernardo Valdes
Publisher: name: Unknown
Year: 2004
Subjects: subject: Livestock Production/Industries
subject: Viability of farms
subject: agrarian structures
subject: bovine livestock
subject: Galicia
subject: structural adjustment

description: RESUMEN En este artículo se elabora una tipología de las explotaciones de bovino en Galicia en función de su viabilidad económica y demográfica, empleando como fuente las bases de datos anonimizadas de los censos agrarios de 1989 y 1999. Los resultados así obtenidos son utilizados en una triple dirección: ofrecer una radiografía de la estructura actual del sector, interpretar sus transformaciones recientes y proyectar las tendencias para la próxima década (1999-2009). El análisis permite concluir que el sector está integrado por tres grandes grupos de explotaciones, con unas características y unas perspectivas muy diferentes: aquéllas con viabilidad económica y demográfica, sólo 1/5 pero que concentran ya la mayor parte del output; las que están en manos de un titular mayor de 55 años sin sucesor, alrededor de 1/3, en su mayoría de muy pequeño tamaño; y finalmente el colectivo más numeroso (50% del total) y con un futuro más incierto, formado por las explotaciones con posibilidad de continuidad familiar pero inviables económicamente. PALABRAS CLAVE: Viabilidad de explotaciones, estructuras agrarias, ganadería bovina, Galicia, ajuste estructural SUMMARY In this article, data bases from the 1989 and 1999 Agricultural Censuses are employed in order to elaborate a typology of the bovine farms in Galicia, which is based on the farms economic and demographic viability. The analysis allows us to conclude that the sector is integrated by three large groups of farms, with very different characteristics and perspectives. The first group is made of farms with economic and demographic viability, representing only 1/5 of the total although concentrating most of the output, whereas the second contains 1/3 of the total number of farms which are operated by farmers aged 55 or above without successor, and in its majority of very small size. Finally, the third is the most numerous group (50% of the total) and formed by farms with a more uncertain future, because they have possibility of succession but are not economically viable. Thus, the obtained results are used in three ways: to offer an analysis of the present structure of the sector, to interpret its recent transformations, and to project the tendencies for the next decade (1999-2009).
Heterogeneidad de preferencias y experimentos de eleccion: aplicacion de un logit con parametros aleatorios a la demanda de nueces
Creators: name: Camarena-Gomez, Dena M.
name: Sanjuan, Ana Isabel
name: Camarena-Gomez, Dena M.
name: Sanjuan, Ana Isabel
Publisher: name: Unknown
Year: 2004
Subjects: subject: Demand and Price Analysis
subject: mixed or random parameters logit
subject: stated preferences
subject: choice experiment
subject: heterogeneous preferences
subject: walnuts

description: RESUMEN En este artículo se examinan las preferencias declaradas de los consumidores hacia las nueces, mediante un experimento de eleccion, con un doble objetivo: primero, identificar los atributos más relevantes para el consumidor a la hora de adquirir este fruto y, segundo, estimar las posibilidades de introducción de la variedad Pecán. De ello se pueden obtener guías sobre la manera de incentivar el consumo y recomendaciones a las empresas comercializadoras. Los datos se analizaron mediante la estimación de un modelo logit mixto o con parámetros aleatorios, que permite relajar la propiedad de IIA (independencia de alternativas irrelevantes) presente en los modelos logit con parámetros fijos, al permitir que el coeficiente de cada atributo/nivel varíe aleatoriamente entre consumidores, reflejando así la heterogeneidad de las preferencias de los individuos. Asimismo, permite estimar eficientemente los parámetros cuando cada individuo elige varias veces, como en la presente investigación. Palabras clave: logit con parámetros aleatorios, preferencias declaradas, experimento de elección, nueces. ABSTRACT Consumers' stated preferences towards walnuts are studied by means of a choice experiment, with a double objective: first, to identify the main attributes searched by consumer at purchase and second, to analyse the chances for the introduction into the Spanish market of the Pecan variety. From this study, commercial guidelines may be derived, that helps distribution and import companies to commercialise this nut. A mixed or random parameters logit is estimated which relaxes the IIA property (independence of irrelevant alternatives) present in the logit model with fixed parameters. In a mixed logit, coefficients of each attribute/level vary randomly across consumers, reflecting the heterogeneity of individuals' preferences. This model also allows estimate efficiently the parameters when each individual chooses several times, as in the present study.
Factores determinantes del precio de la carne de ternera: un analisis hedonico
Creators: name: Royo, Azucena Gracia
name: Perez Y Perez, Luis
name: Royo, Azucena Gracia
name: Perez Y Perez, Luis
Publisher: name: Unknown
Year: 2004
Subjects: subject: Demand and Price Analysis
subject: beef market
subject: hedonic prices
subject: Box-Cox transformation
subject: designation of origin
subject: econometric estimation

description: El mercado de la carne se ha visto afectado por las recientes crisis alimentarias. La decisión del consumo se ve afectada por el precio, y éste por las características del producto y otros factores que pueden influir en la utilidad del consumidor. A través de la metodología de los precios hedónicos, nuestro objetivo es determinar el valor económico asignado por el consumidor a las características de la carne que influyen en su decisión de compra. Se utiliza información proporcionada por dos encuestas a 540 consumidores de la ciudad de Zaragoza en 2001 y 2002. En la estimación econométrica se asume una forma funcional flexible, a partir de una transformación Box-Cox, lo que resuelve el problema de la forma funcional. Los resultados muestran que la valoración de los consumidores de los atributos de la carne no varía de un año a otro y que la pertenencia a alguna Denominación de Origen es la característica que más determina el precio de la carne de ternera. Palabras clave: mercado de la carne, precios hedónicos, transformación Box-Cox, Denominación de Origen, estimación econométrica. Abstract. Beef market has been affected by recent food products crises. The consumer's decision is being related to the price and this one by the product characteristics and by other factors which can influence the consumer's utility. The objective of the paper is to analyse the economic value of the beef attributes influencing the consumer's purchase decision using an hedonic prices methodology. Data come from two surveys carried out on 540 consumers in Zaragoza City in the years 2001 and 2002. In the econometric estimation, a flexible functional form is assumed, the Box-Cox transformation. This approach solves the functional form problem. Results show that the consumers' assessment on the beef attributes does not change from one year to another and that the designation of origin is the most important characteristic determining the beef price.
Evolution of the 0.01 - 25 Hz power spectral components in Cygnus X-1
Creators: name: Axelsson, M.
name: Borgonovo, L.
name: Larsson, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Analyzing the archival data from the Rossi X-ray Timing Explorer (RXTE), we study the power density spectra (PDS) of Cygnus X-1 from 1996 to 2003 in the frequency range of 0.01 - 25 Hz. With our model we are able to track the evolution of the Lorentzian components through all spectral states of the source. We confirm the relation between characteristic frequencies seen both in black hole candidate and neutron star sources, and show the changes in this relation during the transitional and soft states of the source. The connection between the Lorentzian components is investigated by analyzing similarities and differences in their behavior. We find that the spectral state of the source can be uniquely determined from the parameters of the these components. The parameter correlations can all be described by continuous functions, which differ between components. We discuss our results in the context of relativistic precession model for the accretion disk, and show a remarkable agreement between the model prediction and the data in the hard state. We estimate a value for the specific angular momentum of a=+0.49 (-0.57) in the case of prograde retrograde) rotation and an estimate for the inner radius of 22 to 50 (25 to 55) gravitational radii.
description: 15 pages, 17 figures, accepted for publication in A&A
Las principales aportaciones a la teoria de la regulacion medioambiental. Los ultimos cuarenta anos.
Creators: name: Grau, Montserrat Viladrich
name: Grau, Montserrat Viladrich
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy

description: Resumen : En este artículo analizo las principales aportaciones a la teoría de la regulación medioambiental desarrolladas durante los últimos cuarenta años. Inicio este recorrido en los años sesenta con la presentación de las primeras contribuciones. A continuación, abordo el estudio de la década de los setenta, donde me centro de manera preferente en la comparación de las propiedades de los sistemas basados en incentivos económicos y de los basados en cantidades. Seguidamente me adentro en los desarrollos que surgieron durante los ochenta, concentrando mi atención en el análisis de los sistemas de licencias negociables. Por último, analizo como en la década de los noventa la regulación medioambiental se orienta hacia la búsqueda de soluciones para los problemas de contaminación global. Abstract: In this article I present the main contributions to the theory of environmental regulation developed during the last forty years. I begin the analysis in the sixties and seventies reviewing the main articles of these years, focusing in the comparison of the properties of the instruments based on economic incentives and of the instruments based on quantities. Next I evaluate the policy developments of the eighties, centering my attention on the generalization of the systems of marketable permits. Finally, I analyze how in the nineties the main interest of environmental regulation is oriented towards the solution of global environmental problems. Palabras Clave: Instrumentos regulación medioambiental.
Cataloging the radio-sky with unsupervised machine learning: a new approach for the SKA era
Creators: name: Galvin, T. J.
name: Huynh, M.
name: Norris, R. P.
name: Wang, X. R.
name: Hopkins, E.
name: Polsterer, K.
name: Ralph, N. O.
name: O'Brien, A. N.
name: Heald, G. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We develop a new analysis approach towards identifying related radio components and their corresponding infrared host galaxy based on unsupervised machine learning methods. By exploiting PINK, a self-organising map algorithm, we are able to associate radio and infrared sources without the a priori requirement of training labels. We present an example of this method using $894,415$ images from the FIRST and WISE surveys centred towards positions described by the FIRST catalogue. We produce a set of catalogues that complement FIRST and describe 802,646 objects, including their radio components and their corresponding AllWISE infrared host galaxy. Using these data products we (i) demonstrate the ability to identify objects with rare and unique radio morphologies (e.g. 'X'-shaped galaxies, hybrid FR-I/FR-II morphologies), (ii) can identify the potentially resolved radio components that are associated with a single infrared host and (iii) introduce a "curliness" statistic to search for bent and disturbed radio morphologies, and (iv) extract a set of 17 giant radio galaxies between 700-1100 kpc. As we require no training labels, our method can be applied to any radio-continuum survey, provided a sufficiently representative SOM can be trained.
Additional file 3 of An integrated community mental healthcare program to reduce suicidal ideation and improve maternal mental health during the postnatal period: the findings from the Nagano trial
Creators: name: Tachibana, Yoshiyuki
name: Koizumi, Noriaki
name: Mikami, Masashi
name: Shikada, Kana
name: Yamashita, Sayaka
name: Shimizu, Mieko
name: Machida, Kazuyo
name: Ito, Hiroto
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 3. Suicide intervention criteria.
title: Lake Effect Snow Warning Polygon Experiment: Verification
Creators: name: Church, David
Publisher: name: NOAA National Weather Service Eastern Region
publisherIdentifier: https://ror.org/02txa8h30
publisherIdentifierScheme: ROR
Year: 2021

description: Eastern Region technical attachment (National Weather Service (U.S.)) ; 2021-01
description: Currently, National Weather Service Offices, including WFO Buffalo, issue Lake Effect Snow Warnings in a zone-based format. However, unlike traditional winter storm systems, lake effect snow typically occurs on a localized scale. Starting in the 2015-2016 winter season, WFO Buffalo gained permission to experiment with creating polygon-based warnings for lake effect snow within the operational zone-based warning framework for events off of Lake Ontario. The office expanded the polygon-based warning experiment to events originating off both Lakes Erie and Ontario in winter 2016-2017, and continued the experiment into winter of 2017-2018. Polygonbased warnings are familiar to other severe weather warning operations within the National Weather Service, and offer potentially attractive benefits to lake effect snow warning applications, such as reduced false alarm area and more specific hazard timing information over zone-based warnings.  With several seasons of events containing parallel zone-based and polygon-based Lake Effect Snow warnings, this study examined the verification of both warning methods to determine if the polygon-based warnings are more skillful than zone-based warnings. Verification for the LES polygons is more complex than standard zone-based warnings, as the polygons allow for temporal variation in the location of the high-impact lake effect snow, and can also be updated more frequently to reflect the most current forecast information available. A spatial verification scheme is presented here that allows for equitable scoring of zone-based and polygon-based warnings using common statistics, such as probability of detection (POD), false alarm rate (FAR), and critical success index (CSI).  In addition, given the unique nature of the LES polygons compared to most other NWS warning products, statistics like spatial and population savings, and the reduction of unnecessary warning time were also examined.  Spatial verification showed a statistically significant increase in skill for polygon-based warnings over legacy zone-based warnings. Population statistics showed that the number of people that were correctly removed from the zone-based warning was much greater than the number of people that were incorrectly removed from the zone-based warning. Finally, polygon-based warnings were found to reduce unnecessary warning time by approximately half over zone-based warnings. The verification statistics presented show that there is sufficient forecast skill and significant value in switching to a polygon-based warning scheme from the current zone-based warning scheme.
Characterization of Hamamatsu 14160 series of Silicon Photo-Multipliers
Creators: name: Cattaneo, P. W.
name: Menegolli, A.
name: Prata, M. C.
name: Raselli, G. L.
name: Rossella, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Silicon Photo-Multipliers (SiPMs) are semiconductor-based photo-detectors with performances similar to the traditional Photo-Multiplier Tubes (PMTs). An increasing number of experiments dedicated to particle detection in colliders, accelerators, astrophysics, neutrino and rare-event physics involving scintillators are using SiPMs as photodetectors. They are gradually substituting PMTs in many applications, especially where low voltages are required and high magnetic field is present. Hamamatsu Photonics K.K., one of leading producers of photo-detectors, in the last year introduced the S14160 series of SiPMs with improved performances. In this work, a characterization of these devices will be presented in terms of breakdown voltages, pulse shape, dark current and gain. Particular attention has been dedicated to the analysis of the parameters as function of temperature.
description: 8 pages 10 figures. Presented at INSTR20: Instrumentation for Colliding Beam Physics, Novosibirsk, Russia, 24-28 February, 2020. Accepted by JINST
Festugière, André-Jean: Les actes apocryphes de Jean et de Thomas
Creators: name: Gessel, Wilhelm
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 70 (1986): Oriens christianus, Band 70
Analisis economico de la erosion del suelo: valoracion de los efectos externos en la cuenca del Alto Genil
Creators: name: Colombo, Sergio
name: Calatrava-Requena, Javier
name: Colombo, Sergio
name: Calatrava-Requena, Javier
Publisher: name: Unknown
Year: 2004
Subjects: Resource /Energy Economics and Policy

description: El presente trabajo trata de evaluar los efectos externos de la erosión del suelo mediante el uso del método del Experimento de Elección (EE). Tras una breve revisión de la literatura socioeconómica sobre el problema de la erosión y de los métodos empleados para evaluar sus efectos, se describe una aplicación a la evaluación de los efectos externos de la erosión del suelo en la cuenca del Alto Genil (Granada). El empleo del método del EE permite el cálculo de los valores asociados a los impactos más importantes de la erosión, así como proporcionar al administrador público información útil para la determinación de prioridades de gestión en el contexto de la planificación territorial. También se estima la variación de bienestar que la aplicación de políticas de reducción de la erosión del suelo, y sus efectos externos, induce en los ciudadanos. Dichas valoraciones se compararán con las actuales ayudas que la Consejería de Agricultura y Pesca de la Junta de Andalucía reconoce a los agricultores que adoptan métodos de producción agraria de conservación del suelo. Palabras claves: Valoración monetaria, Externalidades, Experimento de Elección, Erosión. Abstract The paper presents the economic evaluation of the soil erosion off-farm effects by means of the Choice Experiment method. After a review of the main studies that consider, under a socio-economic point of view, the soil erosion problem an application of the choice experiment to monetary evaluation of the off-farm effects of soil erosion in the Alto Genil watershed (Granada province) is described. The choice experiment method allows the estimation of the values of the most important soil erosion impacts, so that to provide public-decisors with useful information regarding land management. Also, the welfare change experimented by citizens, due to the implementation of soil erosion reduction policies, is investigated. These evaluations will be compared with the subsidy that the regional government grants to farmers that adopt soil conservation measures.
Additional file 2 of A systematic review of mitochondrial abnormalities in myalgic encephalomyelitis/chronic fatigue syndrome/systemic exertion intolerance disease
Creators: name: Holden, Sean
name: Maksoud, Rebekah
name: Eaton-Fitch, Natalie
name: Cabanas, Hélène
name: Staines, Donald
name: Marshall-Gradisnik, Sonya
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional File 2. JBI quality assessment table and descriptions.
Black holes and fundamental physics
Creators: name: Lemos, José P. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: We give a review of classical, thermodynamic and quantum properties of black holes relevant to fundamental physics.
description: Invited talk at the Fifth International Workshop on New Worlds in Astroparticle Physics, University of the Algarve, Faro, Portugal, January 8-10, 2005, published in the Proceedings of the Fifth International Workshop on New Worlds in Astroparticle Physics, World Scientific (2006), eds. Ana M. Mour\~ao et al., p. 71-90
Estimacion del valor del regadio a partir del precio de la tierra
Creators: name: Sampedro, Carlos Arias
name: Sampedro, Carlos Arias
Publisher: name: Unknown
Year: 2001
Subjects: subject: Land Economics/Use
subject: Hedonic prices
subject: Land prices
subject: Water value

description: Este trabajo calcula el valor del regadío en la provincia de León a partir de datos de precios de la tierra desagregados por aprovechamiento y comarca. El valor de los beneficios asociados al regadío puede averiguarse comparando dos parcelas de tierra "iguales" excepto por el hecho de que una de las tierras sea de secano y la otra de regadío. La dificultad de encontrar estas parcelas de tierra iguales se soluciona acudiendo al análisis de regresión donde se analizan los efectos del regadío en el precio de la tierra tras controlar los efectos de las características que diferencian a las parcelas analizadas. Usando un modelo econométrico se calculan los precios medios de la tierra asociados a los aprovechamientos de secano y de regadío. La diferencia entre estos precios constituye una valoración del regadío. Los resultados del trabajo permiten valorar proyectos de regadío en función de la superficie de tierra que permitan regar. Abstract: In this paper, we estimate the value of irrigated land in the province of Leon (Spain) using land prices (irrigated and non irrigated) for two different uses (crop production and pasture) in ten different districts. The value of benefits associated with irrigation can be estimated by comparing the price of an irrigated plot of land with a similar plot of non irrigated land. The logical difficulty of finding these two similar (except for water) plots of land can be overcome using regression analysis where the effect of irrigation on land prices can be estimated after controlling for other differences in the plots of land analyzed. In the present paper, using an econometric model, we estimate the average prices associated with irrigated and non irrigated land. The difference among these average prices is an estimate of the value of irrigation. The results of this paper can be used in the analysis of new irrigation projects.
H.26l : analysis and real-time encoding algorithms
Creators: name: Joch, Anthony Peter
Publisher: name: University of British Columbia
Year: 2009

description: The digital video industry has experienced impressive growth in recent years as the driving force behind a number of applications such as videoconferencing, DVD-Video systems, digital cable television and Internet streaming of video. One of the major factors in the success of this industry has been the development and acceptance of international standards for video coding including ITU-T H.263 and ISO/IEC MPEG-2. In the continuation of this work, the ITU-T Video Coding Experts' Group (VCEG) is currently developing a next-generation video coding standard known as H.26L. This draft standard, which is scheduled for completion in 2002, offers new levels of compression performance and additional features beyond those available in earlier standards. However, these advantages come at the cost of increased complexity and computational demands. In this thesis, we analyze the rate-distortion performance of the H.26L standard and develop algorithms that increase the speed of video encoding while making minimal sacrifices in terms of rate-distortion performance. First, we establish the optimal rate-distortion performance of the emerging standard and compare this to all other popular visual coding standards. Results will illustrate the improved levels of coding performance that H.26L can provide. Next, we perform a detailed analysis of the features of H.26L that lead to improvements in compression performance. Through this analysis, we will establish a foundation for the development of reduced-complexity encoding algorithms that are intended to enable real-time video applications that can benefit from the improved compression performance of H.26L on current and emerging hardware platforms.
The DEEP2 Galaxy Redshift Survey: Clustering of Galaxies as a Function of Luminosity at z=1
Creators: name: Coil, Alison L.
name: Newman, Jeffrey A.
name: Cooper, Michael C.
name: Davis, Marc
name: Faber, S. M.
name: Koo, David C.
name: Willmer, Christopher N. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We measure the clustering of DEEP2 galaxies at z=1 as a function of luminosity on scales 0.1 Mpc/h to 20 Mpc/h. Drawing from a parent catalog of 25,000 galaxies at 0.7L^*, have a steeper slope. The clustering scale-length, r_0, varies from 3.69 +/-0.14 for the faintest sample to 4.43 +/-0.14 for the brightest sample. The relative bias of galaxies as a function of L/L^* is steeper than the relation found locally for SDSS galaxies (Zehavi et al. 2005) over the luminosity range that we sample. The absolute bias of galaxies at z=1 is scale-dependent on scales r_p<1 Mpc/h, and rises most significantly on small scales for the brightest samples. For a concordance cosmology, the large-scale bias varies from 1.26 +/-0.04 to 1.54 +/-0.05 as a function of luminosity and implies that DEEP2 galaxies reside in dark matter halos with a minimum mass of ~1-3 10^12 h^-1 M_sun.
description: 6 pages, 6 figures, emulateapj format, accepted to ApJ
Superconductivity from buckled-honeycomb-vacancy ordering
Creators: name: Qi, Yanpeng
name: Ying, Tianping
name: Wu, Xianxin
name: Dong, Zhuoya
name: Sasase, Masato
name: Zhang, Qing
name: Liu, Weiyan
name: Ichihara, Masaki
name: Ma, Yanhang
name: Hu, Jiangping
name: Hosono, Hideo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Vacancies are prevalent and versatile in solid-state physics and materials science. The role of vacancies in strongly correlated materials, however, remains uncultivated until now. Here, we report the discovery of an unprecedented vacancy state forming an extended buckled-honeycomb-vacancy (BHV) ordering in Ir$_{16}$Sb$_{18}$. Superconductivity emerges by suppressing the BHV ordering through squeezing of extra Ir atoms into the vacancies or isovalent Rh substitution. The phase diagram on vacancy ordering reveals the superconductivity competes with the BHV ordering. Further theoretical calculations suggest that this ordering originates from a synergistic effect of the vacancy formation energy and Fermi surface nesting with a wave vector of (1/3, 1/3, 0). The buckled structure breaks the crystal inversion symmetry and can mostly suppress the density of states near the Fermi level. The peculiarities of BHV ordering highlight the importance of "correlated vacancies" and may serve as a paradigm for exploring other non-trivial excitations and quantum criticality.
description: 38 pages, 24 figures, 3 tables
An isoperimetric problem for leaky loops and related mean-chord inequalities
Creators: name: Exner, Pavel
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81V99, 35P15

description: We consider a class of Hamiltonians in $L^2(\R^2)$ with attractive interaction supported by piecewise $C^2$ smooth loops $Γ$ of a fixed length $L$, formally given by $-Δ-αδ(x-Γ)$ with $α>0$. It is shown that the ground state of this operator is locally maximized by a circular $Γ$. We also conjecture that this property holds globally and show that the problem is related to an interesting family of geometric inequalities concerning mean values of chords of $Γ$.
description: LaTeX, 16 pages
SN 2018zd: An Unusual Stellar Explosion as Part of the Diverse Type II Supernova Landscape
Creators: name: Zhang, Jujia
name: Wang, Xiaofeng
name: Vinko, Jozsef
name: Zhai, Qian
name: Zhang, Tianmeng
name: Filippenko, Alexei V.
name: Brink, Thomas G.
name: Zheng, WeiKang
name: Wyrzykowski, Lukasz
name: Mikolajczyk, Przemyslaw
name: Huang, Fang
name: Rui, Liming
name: Mo, Jun
name: Sai, Hanna
name: Zhang, Xinhan
name: Wang, Huijuan
name: DerKacy, James M.
name: Baron, Eddie
name: Sarneczky, K.
name: Bodi, A.
name: Csornyei, G.
name: Hanyecz, O.
name: Ignacz, B.
name: Kalup, Cs.
name: Kriskovics, L.
name: Konyves-Toth, R.
name: Ordasi, A.
name: Pal, A.
name: Sodor, A.
name: Szakats, R.
name: Vida, K.
name: Zsidi, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present extensive observations of SN 2018zd covering the first $\sim450$\,d after the explosion. This SN shows a possible shock-breakout signal $\sim3.6$\,hr after the explosion in the unfiltered light curve, and prominent flash-ionisation spectral features within the first week. The unusual photospheric temperature rise (rapidly from $\sim 12,000$\,K to above 18,000\,K) within the earliest few days suggests that the ejecta were continuously heated. Both the significant temperature rise and the flash spectral features can be explained with the interaction of the SN ejecta with the massive stellar wind ($0.18^{+0.05}_{-0.10}\, \rm M_{\odot}$), which accounts for the luminous peak ($L_{\rm max} = [1.36\pm 0.63] \times 10^{43}\, \rm erg\,s^{-1}$) of SN 2018zd. The luminous peak and low expansion velocity ($v \approx 3300$ km s$^{-1}$) make SN 2018zd to be like a member of the LLEV (luminous SNe II with low expansion velocities) events originated due to circumstellar interaction. The relatively fast post-peak decline allows a classification of SN 2018zd as a transition event morphologically linking SNe~IIP and SNe~IIL. In the radioactive-decay phase, SN 2018zd experienced a significant flux drop and behaved more like a low-luminosity SN~IIP both spectroscopically and photometrically. This contrast indicates that circumstellar interaction plays a vital role in modifying the observed light curves of SNe~II. Comparing nebular-phase spectra with model predictions suggests that SN 2018zd arose from a star of $\sim 12\,\rm M_{\odot}$. Given the relatively small amount of $^{56}$Ni ($0.013 - 0.035 \rm M_{\odot}$), the massive stellar wind, and the faint X-ray radiation, the progenitor of SN 2018zd could be a massive asymptotic giant branch star which collapsed owing to electron capture.
description: Accepted for publication in MNRAS, 20 pages, 11 figures
CMEs in the Heliosphere: III. A Statistical Analysis of the Kinematic Properties Derived from Stereoscopic Geometrical Modelling Techniques Applied to CMEs Detected in the Heliosphere from 2008 to 2014 by STEREO/HI-1
Creators: name: Barnes, D.
name: Davies, J. A.
name: Harrison, R. A.
name: Byrne, J. P.
name: Perry, C. H.
name: Bothmer, V.
name: Eastwood, J. P.
name: Gallagher, P. T.
name: Kilpua, E. K. J.
name: Möstl, C.
name: Rodriguez, L.
name: Rouillard, A. P.
name: Odstrcil, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We present an analysis of coronal mass ejections (CMEs) observed by the Heliospheric Imagers (HIs) on board NASA's Solar Terrestrial Relations Observatory (STEREO) spacecraft. Between August 2008 and April 2014 we identify 273 CMEs that are observed simultaneously, by the HIs on both spacecraft. For each CME, we track the observed leading edge, as a function of time, from both vantage points, and apply the Stereoscopic Self-Similar Expansion (SSSE) technique to infer their propagation throughout the inner heliosphere. The technique is unable to accurately locate CMEs when their observed leading edge passes between the spacecraft, however, we are able to successfully apply the technique to 151, most of which occur once the spacecraft separation angle exceeds 180 degrees, during solar maximum. We find that using a small half-width to fit the CME can result in observed acceleration to unphysically high velocities and that using a larger half-width can fail to accurately locate the CMEs close to the Sun because the method does not account for CME over-expansion in this region. Observed velocities from SSSE are found to agree well with single-spacecraft (SSEF) analysis techniques applied to the same events. CME propagation directions derived from SSSE and SSEF analysis agree poorly because of known limitations present in the latter. This work was carried out as part of the EU FP7 HELCATS (Heliospheric Cataloguing, Analysis and Techniques Service) project (http://www.helcats-fp7.eu/).
Identification of Main Sequence Stars with Mid-Infrared Excesses Using GLIMPSE: Beta-Pictoris Analogs?
Creators: name: Uzpen, B.
name: Kobulnicky, H. A.
name: Olsen, K. A. G.
name: Clemens, D. P.
name: Laurance, T. L.
name: Meade, M. R.
name: Babler, B. L.
name: Indebetouw, R.
name: Whitney, B. A.
name: Watson, C.
name: Wolfire, M. G.
name: Wolff, M. J.
name: Benjamin, R. A.
name: Bania, T. M.
name: Cohen, M.
name: Devine, K. E.
name: Dickey, J. M.
name: Heitsch, F.
name: Jackson, J. M.
name: Marston, A. P.
name: Mathis, J. S.
name: Mercer, E. P.
name: Stauffer, J. R.
name: Stolovy, S. R.
name: Backman, D. E.
name: Churchwell, E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Spitzer IRAC 3.6-8 micron photometry obtained as part of the GLIMPSE survey has revealed mid-infrared excesses for 33 field stars with known spectral types in a 1.2 sq. degree field centered on the southern Galactic HII region RCW49. These stars comprise a subset of 184 stars with known spectral classification, most of which were pre-selected to have unusually red IR colors. We propose that the mid-IR excesses are caused by circumstellar dust disks that are either very late remnants of stellar formation or debris disks generated by planet formation. Of these 33 stars, 29 appear to be main-sequence stars based on optical spectral classifications. Five of the 29 main-sequence stars are O or B stars with excesses that can be plausibly explained by thermal bremsstrahlung emission, and four are post main-sequence stars. The lone O star is an O4V((f)) at a spectrophotometric distance of 3233+ 540- 535 pc and may be the earliest member of the Westerlund 2 cluster. Of the remaining 24 main-sequence stars, 18 have SEDs that are consistent with hot dusty debris disks, a possible signature of planet formation. Modeling the excesses as blackbodies demonstrates that the blackbody components have fractional bolometric disk-to-star luminosity ratios, LIR/L*, ranging from 10^-3 to 10^-2 with temperatures ranging from 220 to 820 K. The inferred temperatures are more consistent with asteroid belts rather than the cooler temperatures expected for Kuiper belts. Mid-IR excesses are found in all spectral types from late B to early K.
Modeling Luminosity-Dependent Galaxy Clustering Through Cosmic Time
Creators: name: Conroy, Charlie
name: Wechsler, Risa H.
name: Kravtsov, Andrey V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We employ high-resolution dissipationless simulations of the concordance LCDM cosmology to model the observed luminosity dependence and evolution of galaxy clustering through most of the age of the universe, from z~5 to z~0. We use a simple, non-parametric model which monotonically relates galaxy luminosities to the maximum circular velocity of dark matter halos (V_max) by preserving the observed galaxy luminosity function in order to match the halos in simulations with observed galaxies. The novel feature of the model is the use of the maximum circular velocity at the time of accretion, V_max,acc, for subhalos, the halos located within virial regions of larger halos. We argue that for subhalos in dissipationless simulations, V_max,acc reflects the luminosity and stellar mass of the associated galaxies better than the circular velocity at the epoch of observation, V_max,now. The simulations and our model L-V_max relation predict the shape, amplitude, and luminosity dependence of the two-point correlation function in excellent agreement with the observed galaxy clustering in the SDSS data at z~0 and in the DEEP2 samples at z~1 over the entire probed range of projected separations, 0.1
description: 16 pages 11 figures, ApJ in press
Additional file 1 of A systematic review of mitochondrial abnormalities in myalgic encephalomyelitis/chronic fatigue syndrome/systemic exertion intolerance disease
Creators: name: Holden, Sean
name: Maksoud, Rebekah
name: Eaton-Fitch, Natalie
name: Cabanas, Hélène
name: Staines, Donald
name: Marshall-Gradisnik, Sonya
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Cell Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional File 1. Raw search code.
Magnetic ordering of random dense packings of freely rotating dipoles
Creators: name: Alonso, J. J.
name: Alles, B.
name: Russier, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study random dense packings of Heisenberg dipoles by numerical simulation. The dipoles are at the centers of identical spheres that occupy fixed random positions in space and fill a fraction $Φ$ of the spatial volume. The parameter $Φ$ ranges from rather low values, typical of amorphous ensembles, to the maximum $Φ$=0.64 that occurs in the random-close-packed limit. We assume that the dipoles can freely rotate and have no local anisotropies. As well as the usual thermodynamical variables, the physics of such systems depends on $Φ$. Concretely, we explore the magnetic ordering of these systems in order to depict the phase diagram in the temperature-$Φ$ plane. For $Φ\gtrsim0.49$ we find quasi-long-range ferromagnetic order coexisting with strong long-range spin-glass order. For $Φ\lesssim0.49$ the ferromagnetic order disappears giving way to a spin-glass phase similar to the ones found for Ising dipolar systems with strong frozen disorder.
description: 12 pages, 16 figures, 1 table
Īliyā al-Ǧawharī, Īliyā of Damascus
Creators: name: Fiaccadori, Gianfranco
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 70 (1986): Oriens christianus, Band 70
Conceptualizing Relational Technologies for Native Hawaiian (HI)stories and Contemporary Realities in the Pacific Northwest
Creators: name: Galla, Candace
name: Zhuravleva, Anastasia
name: McEachern, Firth
Publisher: name: BC Studies: The British Columbian Quarterly
Year: 2025

description: In the present research note, we share our ongoing research project, which conceptualizes relational technologies in an effort to document the (hi)stories and contemporary realities of Kānaka Maoli (Native Hawaiians) in the Pacific Northwest. In the late 18th through the mid-19th centuries, Kānaka Maoli voyaged to the region, employed primarily as seamen or fur trade laborers. This was at a time when foreigners from distant lands happened upon Hawaiʻi in the Pacific Ocean, imposing their own ideologies to a people and culture that was very much an independent and self-sufficient Nation. Some Kānaka Maoli remained in the Pacific Northwest, settling and starting families of their own. This Hawaiian (hi)story is seen in geographic names and heritage festivals, and passed down through familial stories, but remains relatively outside of the general public’s view, leading us to wonder about the possibilities of creating a digital archive/repository for this (hi)story. Here, we reflect on Indigenous Hawaiian diaspora and discuss how digital tools and processes in documentation, mapping, and archiving can provide rich opportunities to preserve, explore, and share such (hi)stories. We conclude that building a relational digital archive with and for Indigenous diaporic communities is a complex and intricate undertaking that requires critical thought and deep, community-aided relfection.
description: BC Studies: The British Columbian Quarterly, No. 224: Relational Technologies (Winter 2024/25)
Quantum walk on a graph of spins: magnetism and entanglement
Creators: name: Sellapillay, Kevissen
name: Verga, Alberto D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a model of a quantum walk on a graph in which a particle jumps between neighboring nodes and interacts with independent spins sitting on the edges. Entanglement propagates with the walker. We apply this model to the case of a one dimensional lattice, to investigate its magnetic and entanglement properties. In the continuum limit, we recover a Landau-Lifshitz equation that describes the precession of spins. A rich dynamics is observed, with regimes of particle propagation and localization, together with spin oscillations and relaxation. Entanglement of the asymptotic states follows a volume law for most parameters (the coin rotation angle and the particle-spin coupling).
description: 50 pages, 114 references, 30 figures
Coordinating Connection: Establishing a Dementia-Inclusive Digital Community
Creators: name: Landy, Ania
name: Malcolm, Paulina
name: Wong, Karen
name: Phinney, Alison
Publisher: name: BC Studies: The British Columbian Quarterly
Year: 2025

description: In this paper, we reflect on the behind-the-scenes work of developing ways of using "digital technology" to both build a community of people with dementia and transcend the geographic boundaries of local communities. In the participatory action research (PAR) project Flipping Stigma on Its Ear, an Action Group (AG) of people living with dementia met bi-weekly over four years (2019 – 2023) to explore understandings and experiences of stigma and discrimination associated with dementia and develop tools for dementia advocacy. The onset of the COVID-19 pandemic and distancing restrictions enforced in early 2020 meant that the group could no longer gather in person at a neighbourhood house, located in the Lower Mainland of BC. Motivated by the AG members’ dedication to continuing involvement in the project and with encouragement from our partner in Thunder Bay, who had been using online platforms for several years with people with dementia, our team of researchers and AG members quickly learnt how to use Zoom together, and with the AG members’ guidance, developed strategies to support their online engagement.


 In the Flipping Stigma on Its Ear project, creating a dementia-inclusive digital space required establishing supports that were flexible, individualized and embedded in knowledge of the lived experience of dementia. Specific strategies that we utilized to support equitable recruitment and ongoing engagement of people living with dementia in the project included: offering technical assistance and access to resources, involving AG members in decision-making, encouraging peer support, coaching care partners, and identifying local support systems.


Although the circumstances forced us to adopt Zoom to sustain engagement in the project, this virtual space enabled the involvement of people from diverse places across BC (urban, rural and remote communities) and has become its own unique dementia-inclusive digital community for the AG members. Moreover, bringing together people from geographically diverse communities has exposed the group to different contexts shaping their lives and allowing its members to form new connections within and outside their communities. Access to relational technology allowed AG members, geographically located across BC, to work alongside each other towards shared goals and form a province-wide leadership group and a geographically bound identity as a BC group. This work lends insights into the strategies utilized to establish a digital community of people living with dementia that is diverse, equitable, and inclusive.
description: BC Studies: The British Columbian Quarterly, No. 224: Relational Technologies (Winter 2024/25)
A staggered-projection Godunov-type method for the Baer-Nunziato two-phase model
Creators: name: Lei, Xin
name: Li, Jiequan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: When describing the deflagration-to-detonation transition in solid granular explosives mixed with gaseous products of combustion, a well-developed two-phase mixture model is the compressible Baer-Nunziato (BN) model, containing solid and gas phases. If this model is numerically simulated by a conservative Godunov-type scheme, spurious oscillations are likely to generate from porosity interfaces, which may result from the average process of conservative variables that violates the continuity of Riemann invariants across porosity interfaces. In order to suppress the oscillations, this paper proposes a staggered-projection Godunov-type scheme over a fixed gas-solid staggered grid, by enforcing that solid contacts with porosity jumps are always inside gaseous grid cells and other discontinuities appear at gaseous cell interfaces. This scheme is based on a standard Godunov scheme for the Baer-Nunziato model on gaseous cells and guarantees the continuity of the Riemann invariants associated with the solid contact discontinuities across porosity jumps. While porosity interfaces are moving, a projection process fully takes into account the continuity of associated Riemann invariants and ensure that porosity jumps remain inside gaseous cells. This staggered-projection Godunov-type scheme is well-balanced with good numerical performance not only on suppressing spurious oscillations near porosity interfaces but also capturing strong discontinuities such as shocks.
description: 48 pages