cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Brownian motion of a charged test particle in vacuum between two conducting plates
Creators: name: Yu, Hongwei
name: Chen, Jun
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Brownian motion of a charged test particle caused by quantum electromagnetic vacuum fluctuations between two perfectly conducting plates is examined and the mean squared fluctuations in the velocity and position of the test particle are calculated. Our results show that the Brownian motion in the direction normal to the plates is reinforced in comparison to that in the single-plate case. The effective temperature associated with this normal Brownian motion could be three times as large as that in the single-plate case. However, the negative dispersions for the velocity and position in the longitudinal directions, which could be interpreted as reducing the quantum uncertainties of the particle, acquire positive corrections due to the presence of the second plate, and are thus weakened.
description: 10 pages, Revtex4
A Catalog of 531 White Dwarf Candidates in the Local Galactic Halo from Gaia Data Release 2
Creators: name: Kim, Bokyoung
name: Lépine, Sebastien
name: Medan, Ilija
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a catalog of 531 white dwarf candidates that have large apparent transverse motions relative to the Sun ($v_{T} > 200$ km s$^{-1}$), thus making them likely members of the local Galactic halo population. The candidates were selected from the Gaia Data Release 2, and are located in a great circle with $20^\circ$ width running across both Galactic poles and Galactic center and anti-center, a zone that spans 17.3% of the sky. The selection used a combination of kinematic and photometric properties, derived primarily from Gaia proper motions, $G$ magnitudes, and $G_{\rm BP}\,-\,G_{\rm RP}$ color, and including parallax whenever available. Additional validation of the white dwarf candidates is made using PanSTARRS photometric ($gri$) data. Our final catalog includes not only stars having full kinematic and luminosity estimates from reliable Gaia parallax, but also stars with presently unreliable or no available Gaia parallax measurements. We argue that our method to select local halo objects with and without reliable parallax data leads us to rounding up all possible halo white dwarfs in the Gaia catalog (in that particular section of that sky) with recorded proper motions $> 40$ mas yr$^{-1}$, and that pass our $v_{T} > 200$ km s$^{-1}$ threshold requirement. We expect this catalog will be useful for the study of the white dwarf population of the local Galactic halo.
description: Published in ApJ, 11 figures, 6 tables. Tables 2-5 (in LaTex format) can be downloaded from source files; matching published version (v2)
Exactly solvable model for isospin S=3/2 fermionic atoms on an optical lattice
Creators: name: Controzzi, D.
name: Tsvelik, A. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an exact solution of a model describing a low energy behavior of cold isospin S=3/2 fermionic atoms on a one-dimensional optical lattice. Depending on the band filling the effective field theory has a form of a deformed Gross-Neveu model with either $O(7)\times \mathbb{Z}_2$ (half filling) or $U(1)\times O(5)\times \mathbb{Z}_2$ symmetry.
description: 4 pages, no figures, replaced with the final version to appear in PRL
Vandenberghe, Bruno H.: Onze Vaders in het Geloof
Creators: name: Engberding, Hieronymus
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 46 (1962): Oriens christianus, Band 46
Distribution and kinematics of 26Al in the Galactic disc
Creators: name: Fujimoto, Yusuke
name: Krumholz, Mark R.
name: Inutsuka, Shu-ichiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: 26Al is a short-lived radioactive isotope thought to be injected into the interstellar medium (ISM) by massive stellar winds and supernovae. However, all-sky maps of 26Al emission show a distribution with a much larger scale height and faster rotation speed than either massive stars or the cold ISM. We investigate the origin of this discrepancy using an N-body+hydrodynamics simulation of a Milky-Way-like galaxy, self-consistently including self-gravity, star formation, stellar feedback, and 26Al production. We find no evidence that the Milky Way's spiral structure explains the 26Al anomaly. Stars and the 26Al bubbles they produce form along spiral arms, but, because our simulation produces material arms that arise spontaneously rather than propagating arms forced by an external potential, star formation occurs at arm centres rather than leading edges. As a result, we find a scale height and rotation speed for 26Al similar to that of the cold ISM. However, we also show that a synthetic 26Al emission map produced for a possible Solar position at the edge of a large 26Al bubble recovers many of the major qualitative features of the observed 26Al sky. This suggests that the observed anomalous 26Al distribution is the product of foreground emission from the 26Al produced by a nearby, recent supernova.
description: 14 pages, 9 figures. Accepted for publication in MNRAS
Quasiclassical frustration
Creators: name: Kohler, Heiner
name: Sols, Fernando
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the dissipative properties of a harmonic oscillator subject to two independent heat baths, one of which couples to its position and the other one to its momentum. This model describes a large spin impurity in a ferromagnet. We find that some effects of the two heat baths partially cancel each other. Most notably, oscillations may remain underdamped for arbitrarily strong coupling. This effect is a direct consequence of the mutually conjugate character of position and momentum. For a single dissipative bath coupled linearly to both position and momentum, no underdamped regime is possible for strong coupling. The dynamics of purity loss for one and two wave packets is also investigated.
Nonconcavity of the Spectral Radius in Levinger's Theorem
Creators: name: Altenberg, Lee
name: Cohen, Joel E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: G.1.3
subject: 15A18, 15A42, 15B05, 15B48, 15B57

description: Let ${\bf A} \in R^{n \times n}$ be a nonnegative irreducible square matrix and let $r({\bf A})$ be its spectral radius and Perron-Frobenius eigenvalue. Levinger asserted and several have proven that $r(t):=r((1{-}t) {\bf A} + t {\bf A}^\top)$ increases over $t \in [0,1/2]$ and decreases over $t \in [1/2,1]$. It has further been stated that $r(t)$ is concave over $t \in (0,1)$. Here we show that the latter claim is false in general through a number of counterexamples, but prove it is true for ${\bf A} \in R^{2\times 2}$, weighted shift matrices (but not cyclic weighted shift matrices), tridiagonal Toeplitz matrices, and the 3-parameter Toeplitz matrices from Fiedler, but not Toeplitz matrices in general. A general characterization of the range of $t$, or the class of matrices, for which the spectral radius is concave in Levinger's homotopy remains an open problem.
description: v4: Dedication and biographical note. v3: Includes reviewer suggestions. Accepted to Linear Algebra and Its Applications. v2: Replaced graphics that had buggy PDF. 19 pages, 6 figures
Consultoría de transformación digital para la joyería Sugamuxi
Creators: name: Jaimes Gallego, Laura Sofia
name: Murillo Rizo, Natalia
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Mercadeo - Estudios de caso
subject: Redes sociales - Aspectos socioeconómicos
subject: Negocios - Organización
subject: Transformación digital
subject: Estrategias de contenido
subject: Optimización de ventas online
subject: Interacción con clientes

description: El análisis de marketing digital para la joyería Sugamuxi tiene como objetivo optimizar su presencia en Instagram, Facebook y WhatsApp. Los objetivos incluyen aumentar la visibilidad de la marca, mejorar la interacción con los seguidores, incrementar el tráfico a la tienda en línea y aumentar las ventas. Se evaluaron aspectos como el alcance orgánico, el contenido y la demografía del público en redes sociales. Se recomendaron estrategias para mejorar la frecuencia y uniformidad de las publicaciones, fomentar la interacción activa y utilizar catálogos visuales y herramientas interactivas en las historias. Entre las acciones propuestas se encuentran implementar un catálogo en línea, optimizar la atención al cliente a través de WhatsApp, desarrollar contenido atractivo y contratar personal especializado. También se sugiere capacitar al equipo en el uso de herramientas analíticas para ajustar las estrategias basadas en datos. Se establecieron OKRs para mejorar la presencia digital, aumentar la visibilidad y optimizar la atención al cliente. Los KPIs incluyen el tráfico en redes sociales, las interacciones y las ventas a través de WhatsApp.
description: The digital marketing analysis for Sugamuxi jewelry aims to optimize its presence on Instagram, Facebook and WhatsApp. Objectives include increasing brand visibility, improving interaction with followers, increasing traffic to the online store and increasing sales. Aspects such as organic reach, content and audience demographics on social networks were evaluated. Strategies were recommended to improve the frequency and consistency of posts, encourage active interaction, and use visual catalogs and interactive tools in stories. Among the proposed actions are implementing an online catalog, optimizing customer service through WhatsApp, developing attractive content and hiring specialized personnel. It is also suggested to train the team in the use of analytical tools to adjust strategies based on data. OKRs were established to improve digital presence, increase visibility and optimize customer service. KPIs include social media traffic, interactions and sales through WhatsApp.
Fusion Induced by Radioactive Ion Beams
Creators: name: Liang, J. F.
name: Signorini, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The use of radioactive beams opens a new frontier for fusion studies. The coupling to the continuum can be explored with very loosely bound nuclei. Experiments were performed with beams of nuclei at or near the proton and neutron drip-lines to measure fusion and associated reactions in the vicinity of the Coulomb barrier. In addition, the fusion yield is predicted to be enhanced in reactions involving very neutron-rich unstable nuclei. Experimental measurements were carried out to investigate if it is feasible to use such beams to produce new heavy elements. The current status of these experimental activities is given in this review.
description: 30 pages, 12 figures
TOWARDS A COMPREHENSIVE REGIONAL WATER POLICY MODEL FOR THE TEXAS HIGH PLAINS
Creators: name: Das, Biswaranjan
name: Willis, David B.
name: Johnson, Jeffrey W.
name: Das, Biswaranjan
name: Willis, David B.
name: Johnson, Jeffrey W.
Publisher: name: Unknown
Year: 2004
Subjects: Resource /Energy Economics and Policy

description: A 19 county, 50-year dynamic economic optimization model of irrigated crop production is linked to a detailed hydrology model for purposes of improving policy estimates of economic cost and associated water saving of groundwater conservation management policies. Spatial and temporal desegregation, allows planners to target specific areas and improve the accuracy of benefit-cost policy estimates.
Halictus cephalicus Morawitz 1874
Creators: name: Astafurova, Yulia V.
name: Proshchalykin, Maxim Yu.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Halictus
Halictus cephalicus

description: 4. Halictus cephalicus Morawitz, 1874
(Figs 4 a–e)
 Halictus cephalicus Morawitz, 1874: 173, ♀.
 Type locality: Derbent, Dagestan Republic (Russia).
 Published (original) locality: “ Derbent. Bacu [Baku (Azerbaijan)]”.
 Lectotype: ♀, designated Proshchalykin & Astafurova 2016: 10,  // Derbent [Russia, Dagestan Republic, Derbent, 42°04′N 48°17′E] // cephalicus Mor. Typ. [handwritten by F. Morawitz] // Syntypus  // Lectotypus, Halictus confluens Morawitz, design. Proshchalykin et Astafurova, 2016 .
 Paralectotypes: 7 ♀, Derbent // к.[оллекциЯ] Ф. Моравица [Collection of F. Morawitz] // cephalicus Mor. [handwritten by F. Morawitz] // Syntypus .
 Current status. Halictus (Seladonia) cephalicus Morawitz, 1874.
 Remark. Description of male: Blüthgen 1923: 235, Figs 2a, 2b (as Halictus conjungens Blüthgen, 1921, synonymized by Blüthgen 1926: 414).
 Distribution. Europe, Russia (south of European part, North Caucasus, Crimea), Caucasus, Turkey, Syria, Israel, Iraq, Iran, Afghanistan (Astafurova & Proshchalykin 2017b).
description: Published as part of Astafurova, Yulia V. & Proshchalykin, Maxim Yu., 2020, The type specimens of bees (Hymenoptera, Apoidea) deposited in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg. Contribution III Family Halictidae, genera Halictus Latreille, 1804, and Sphecodes Latreille, 1804, pp. 401-446 in Zootaxa 4790 (3) on pages 406-407, DOI: 10.11646/zootaxa.4790.3.1, http://zenodo.org/record/3891137
Consultoría digital 2024 Banco BHD
Creators: name: Paredes Astudillo, Claudia Daniela
name: Lara Silva, Luis Felipe
name: Parrado Zapata, Jenny Carolina
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Estructura - Organización
subject: Ventas - Aspectos socioeconómicos
subject: Innovaciones tecnológicas - Administración
subject: Transformación digital
subject: Estrategias de contenido
subject: Optimización de ventas online
subject: Interacción con clientes

description: El objetivo de este proyecto es realizar una consultoría integral para el banco BHD, enfocada en la optimización de la percepción de marca y la experiencia de usuario en sus productos digitales, utilizando un enfoque estratégico basado en el funnel de conversión y el modelo de análisis competitivo. Este proyecto se articulará en cuatro entregables clave, cada uno asociado a etapas específicas del funnel de conversión, con el fin de identificar, diagnosticar y mejorar los puntos críticos que afectan la eficiencia y efectividad comercial de BHD. Para acotar el análisis de los productos seleccionamos los cuatro principales los cuales son: cuenta de ahorros, tarjeta de crédito, crédito de consumo y préstamo de vehículos.
description: The objective of this project is to conduct a comprehensive consultancy for BHD Bank, focused on optimizing brand perception and user experience in its digital products, using a strategic approach based on the conversion funnel and competitive analysis model. This project will be structured into four key deliverables, each associated with specific stages of the conversion funnel, in order to identify, diagnose, and improve the critical points that affect BHD's commercial efficiency and effectiveness. To narrow down the product analysis, we selected the four main products, which are: savings account, credit card, consumer loan, and vehicle loan.
Additional file 1 of Patients’ and clinicians’ perspectives on a ‘fast-track’ pathway for patients with sciatica in primary care: qualitative findings from the SCOPiC stratified care trial
Creators: name: Saunders, Benjamin
name: Konstantinou, Kika
name: Artus, Majid
name: Foster, Nadine E
name: Bartlam, Bernadette
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Cell Biology
Neuroscience
Cancer
Science Policy

description: Additional file 1 Appendix. Interview Topic Guide: Patients
Re-examination of the size distribution of firms
Creators: name: Kaizoji, Taisei
name: Iyetomi, Hiroshi
name: Ikeda, Yuichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Physics and Society (physics.soc-ph)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: In this paper we address the question of the size distribution of firms. To this aim, we use the Bloomberg database comprising multinational firms within the years 1995-2003, and analyze the data of the sales and the total assets of the separate financial statement of the Japanese and the US companies, and make a comparison of the size distributions between the Japanese companies and the US companies. We find that (i) the size distribution of the US firms is approximately log-normal, in agreement with Gibrat's observation (Gibrat 1931), and in contrast (ii) the size distribution of the Japanese firms is clearly not log-normal, and the upper tail of the size distribution follows the Pareto law. It agree with the predictions of the Simon model (Simon 1955). Key words: the size distribution of firms, the Gibrat's law, and the Pareto law
description: 18 pages, 8 figures
SPISEA: A Python-Based Simple Stellar Population Synthesis Code for Star Clusters
Creators: name: Hosek, M. W.
name: Lu, J. R.
name: Lam, C. Y.
name: Gautam, A. K.
name: Lockhart, K. E.
name: Kim, D.
name: Jia, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present SPISEA (Stellar Population Interface for Stellar Evolution and Atmospheres), an open-source Python package that simulates simple stellar populations. The strength of SPISEA is its modular interface which offers the user control of 13 input properties including (but not limited to) the Initial Mass Function, stellar multiplicity, extinction law, and the metallicity-dependent stellar evolution and atmosphere model grids used. The user also has control over the Initial-Final Mass Relation in order to produce compact stellar remnants (black holes, neutron stars, and white dwarfs). We demonstrate several outputs produced by the code, including color-magnitude diagrams, HR-diagrams, luminosity functions, and mass functions. SPISEA is object-oriented and extensible, and we welcome contributions from the community. The code and documentation are available on GitHub and ReadtheDocs, respectively.
description: 18 pages, 7 figures. Version update: Software package renamed from "PyPopStar" to "SPISEA" due to a naming conflict. Also added a few references to intro. Otherwise, paper is the same
Δ. Καλοκύρου, ´Η ουσίά της ορθοόξου αγιογραφια
Creators: name: Engberding, Hieronymus
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 46 (1962): Oriens christianus, Band 46
The Coase Theorem, or the Coasian Lens? An Application to GMO Regulation
Creators: name: Barnes, James N.
name: James, Harvey S.
name: Kalaitzandonakes, Nicholas G.
name: Barnes, James N.
name: James, Harvey S.
name: Kalaitzandonakes, Nicholas G.
Publisher: name: Unknown
Year: 2004
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We develop a property rights-transaction costs framework called the Coasian Lens (CL). We argue the CL captures Coase's seminal ideas (1937; 1960) more closely than the Coase Theorem. We use the CL to examine how regulation of genetically modified organisms (GMOs) may affect contract structures in the global agri-food chain.
Multifidelity Data Fusion via Gradient-Enhanced Gaussian Process Regression
Creators: name: Deng, Yixiang
name: Lin, Guang
name: Yang, Xiu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We propose a data fusion method based on multi-fidelity Gaussian process regression (GPR) framework. This method combines available data of the quantity of interest (QoI) and its gradients with different fidelity levels, namely, it is a Gradient-enhanced Cokriging method (GE-Cokriging). It provides the approximations of both the QoI and its gradients simultaneously with uncertainty estimates. We compare this method with the conventional multi-fidelity Cokriging method that does not use gradients information, and the result suggests that GE-Cokriging has a better performance in predicting both QoI and its gradients. Moreover, GE-Cokriging even shows better generalization result in some cases where Cokriging performs poorly due to the singularity of the covariance matrix. We demonstrate the application of GE-Cokriging in several practical cases including reconstructing the trajectories and velocity of an underdamped oscillator with respect to time simultaneously, and investigating the sensitivity of power factor of a load bus with respect to varying power inputs of a generator bus in a large scale power system. We also show that though GE-Cokriging method requires a little bit higher computational cost than Cokriging method, the result of accuracy comparison shows that this cost is usually worth it.
Implementación digital para la empresa Neumatipets
Creators: name: Rodríguez Rodríguez, Wendy Lorena
name: Cortés Quiroga, Miguel Ángel
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Acción social - Aspectos socioeconómicos
subject: Organización - Estructura
subject: Pequeña y mediana empresa - Aspectos económicos
subject: Neumatipets
subject: Ambiental
subject: Reciclaje
subject: Llantas
subject: Mascotas

description: En el desarrollo de este trabajo hemos visto que la carencia de herramientas o plataformas digitales en las empresas no logran tener una visibilidad a las audiencias o al público en general, siendo este uno de los inconvenientes para emprendedores o empresas pequeñas ya que si no logran la implementación de herramientas digitales pueden tener complejidades a la hora de ofertar los productos, pues vemos un aumento potencial en que los clientes compran artículos por internet o en algunas plataformas. Hoy en día se ve el aumento de compras de artículos para mascotas y vemos que Neumatipets le apunta a integrarse en este mercado con esfuerzo, dedicación y contribución con el medio ambiente, viendo así oportunidades de implementación que son las que proponemos en el presente trabajo para lograr brindar un empuje a través de herramientas digitales que logren darle mayor sostenibilidad y posicionamiento. Adicionalmente, pudimos evidenciar la importancia de la sostenibilidad y la responsabilidad social en el modelo de negocio no solo para Neumatipets sino para cualquier empresa. El tema digital es un tema bastante amplio que, si se sabe involucrar con la necesidad ambiental, como se evidencia en esta empresa, se puede llegar a explorar bastante.
description: In the development of this work we have seen that the lack of digital tools or platforms in companies does not achieve visibility to audiences or the general public, this being one of the drawbacks for entrepreneurs or small companies since if they do not achieve Implementation of digital tools can have complexities when it comes to offering products, as we see a potential increase in customers purchasing items online or on some platforms. Today we see the increase in purchases of pet items and we see that Neumatipets aims to integrate into this market with effort, dedication and contribution to the environment, thus seeing implementation opportunities that are what we propose in this work to manage to provide a push through digital tools that achieve greater sustainability and positioning. Furthermore, we were able to demonstrate the importance of sustainability and social responsibility in the business model not only for Neumatipets but for any company. The digital issue is a fairly broad topic that, if you know how to get involved with the environmental need, as is evident in this company, you can explore a lot.
Lie algebras associated with one-dimensional aperiodic point sets
Creators: name: Fairlie, David B.
name: Twarock, Reidun
name: Zachos, Cosmas K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The set of points of a one-dimensional cut-and-project quasicrystal or model set, while not additive, is shown to be multiplicative for appropriate choices of acceptance windows. This leads to the definition of an associative additive graded composition law and permits the introduction of Lie algebras over such aperiodic point sets. These infinite dimensional Lie algebras are shown to be representatives of a new type of semi-direct product induced Lie algebras.
description: 13 pages
Role of endothelin-1 in cardiac and vascular dysfunction in streptozotocin-diabetic rats : effects of chronic endothelin receptor blockade
Creators: name: Arikawa, Emi
Publisher: name: University of British Columbia
Year: 2009

description: The present thesis examined the role of endothelin-1 (ET-1), a potent 21-aminoacid vasoconstrictor-mitogen, in diabetic cardiovascular complications. Our previous data showed that diabetic rats exhibited impaired isolated working heart performance, which was ameliorated by chronic treatment with bosentan, a mixed ET[sub A]/ ET[sub B] receptor blocker. Accordingly, an activated endothelin system may be involved in diabetic cardiomyopathy. Using streptozotocin (STZ)-induced diabetic rats, a rodent model of Type 1 diabetes, we examined the effects of long-term treatment with ET receptor antagonists on both the cardiac and vascular systems. The primary observations from our studies are that STZ-induced diabetes resulted in cardiac and vascular dysfunction in association with an up-regulation of the expression of the local ET system (i.e. ET-1 and its receptors). Chronic ET receptor blockade with bosentan improved functional cardiac performance and corrected vascular hyper-reactivity to vasoconstrictors in STZ-diabetic rats. These data suggest that exaggerated ET-1 production and/or action may play a role in the development of cardiovascular dysfunction in diabetes. In the diabetic heart, the cardioprotective effects of bosentan were shown to require the blockade of ET[sub B] receptors, since selective ET[sub A] receptor antagonism with ABT-627 did not provide significant improvement in diabetic rat heart function. Moreover, bosentan may improve diabetic cardiac function by blocking the increase in ET-1-evoked coronary vasoconstriction in diabetes. In the vasculature, while chronic bosentan treatment equally ameliorated the hyper-responsiveness to vasoconstrictors in superior mesenteric arteries (SMA) and renal arteries (RA) from diabetic rats, the underlying mechanisms for this effect appear to be tissue-specific. In SMA, the enhanced vasoconstrictor responses in diabetes seem to be related to an increase in ET[sub A] receptor-activated thromboxane (Tx) synthesis/release in diabetic vascular endothelium, and bosentan may act by blocking the activation of the ET[sub A] receptor and/or normalizing the increased expression of the receptor. In RA, however, the beneficial effects of bosentan treatment on the diabetic vasoconstrictor responses are unlikely to be due to an effect on Tx synthesis, but rather, may be exerted through normalization of the vascular responses to TxA2 . Results presented in this thesis, therefore, provide evidence for a role of ET-1 in cardiovascular dysfunction in diabetes.
Hidden Variables and Nonlocality in Quantum Mechanics
Creators: name: Hemmick, Douglas L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we show that Erwin Schroedinger's generalization of the Einstein Podolsky Rosen argument can be connected to certain mathematical theorems - Gleason's and also Kochen and Specker's - in a manner analogous to the relation of EPR itself with Bell's theorem. In both cases, the conclusion is quantum nonlocality, as we discuss. The "Schroedinger nonlocality" proofs share some features with the Greenberger, Horne, and Zeilinger quantum-nonlocality work, yet also differ in significant ways. For clarity and completeness, we begin with a detailed discussion of the topic of hidden variable theorems. We argue, in agreement with John S. Bell, that 'impossibility' does not follow.
description: 77 pages, 1 figure
Mass-to-light ratios of ellipticals in LCDM
Creators: name: Napolitano, N. R.
name: team, the PN. S
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use the mass-to-light gradients in early-type galaxies to infer the global dark matter fraction, f_d=M_d/M_*, for these systems. We discuss implications about the total star formation efficiency in dark-matter halos and show that the trend of $f_{\rm d}$ with mass produces virial mass-to-light ratios which are consistent with semi-analitical models. Preliminary kurtosis analysis of the quasi-constant M/L galaxies in Romanowsky et al. seems at odd with Dekel et al. simulations.
description: 5 pages, 4 figures. To appear in Proceedings of XXIst IAP Colloquium, "Mass Profiles & Shapes of Cosmological Structures" (Paris, 4-9 July 2005), eds G. A. Mamon, F. Combes, C. Deffayet, B. Fort (Paris: EDP Sciences). Figure enlarged with respect the proceeding format, minor changes. Collaboration website at http://www.astro.rug.nl/~pns/pns_team.html
Extending the Southern Shore of the Island of Inversion to $^{28}$F
Creators: name: Revel, A.
name: Sorlin, O.
name: Marques, F. M.
name: Kondo, Y.
name: Kahlbow, J.
name: Nakamura, T.
name: Orr, N. A.
name: Nowacki, F.
name: Tostevin, J. A.
name: Yuan, C. X.
name: Achouri, N. L.
name: Falou, H. Al
name: Atar, L.
name: Aumann, T.
name: Baba, H.
name: Boretzky, K.
name: Caesar, C.
name: Calvet, D.
name: Chae, H.
name: Chiga, N.
name: Corsi, A.
name: Crawford, H. L.
name: Delaunay, F.
name: Delbart, A.
name: Deshayes, Q.
name: Dombradi, Z.
name: Douma, C. A.
name: Elekes, Z.
name: Fallon, P.
name: Gasparic, I.
name: Gheller, J. -M.
name: Gibelin, J.
name: Gillibert, A.
name: Harakeh, M. N.
name: He, W.
name: Hirayama, A.
name: Hoffman, C. R.
name: Holl, M.
name: Horvat, A.
name: Horvath, A.
name: Hwang, J. W.
name: Isobe, T.
name: Kalantar-Nayestanaki, N.
name: Kawase, S.
name: Kim, S.
name: Kisamori, K.
name: Kobayashi, T.
name: Korper, D.
name: Koyama, S.
name: Kuti, I.
name: Lapoux, V.
name: Lindberg, S.
name: Masuoka, S.
name: Mayer, J.
name: Miki, K.
name: Murakami, T.
name: Najafi, M.
name: Nakano, K.
name: Nakatsuka, N.
name: Nilsson, T.
name: Obertelli, A.
name: Santos, F. de Oliveira
name: Otsu, H.
name: Ozaki, T.
name: Panin, V.
name: Paschalis, S.
name: Rossi, D.
name: Saito, A. T.
name: Saito, T.
name: Sasano, M.
name: Sato, H.
name: Satou, Y.
name: Scheit, H.
name: Schindler, F.
name: Schrock, P.
name: Shikata, M.
name: Shimizu, Y.
name: Simon, H.
name: Sohler, D.
name: Stuhl, L.
name: Takeuchi, S.
name: Tanaka, M.
name: Thoennessen, M.
name: Tornqvist, H.
name: Togano, Y.
name: Tomai, T.
name: Tscheuschner, J.
name: Tsubota, J.
name: Uesaka, T.
name: Yang, Z.
name: Yasuda, M.
name: Yoneda, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Detailed spectroscopy of the neutron-unbound nucleus $^{28}$F has been performed for the first time following proton/neutron removal from $^{29}$Ne/$^{29}$F beams at energies around 230 MeV/nucleon. The invariant-mass spectra were reconstructed for both the $^{27}$F$^{(*)}+n$ and $^{26}$F$^{(*)}+2n$ coincidences and revealed a series of well-defined resonances. A near-threshold state was observed in both reactions and is identified as the $^{28}$F ground state, with $S_n(^{28}$F$)=-199(6)$ keV, while analysis of the $2n$ decay channel allowed a considerably improved $S_n(^{27}$F$)=1620(60)$ keV to be deduced. Comparison with shell-model predictions and eikonal-model reaction calculations have allowed spin-parity assignments to be proposed for some of the lower-lying levels of $^{28}$F. Importantly, in the case of the ground state, the reconstructed $^{27}$F$+n$ momentum distribution following neutron removal from $^{29}$F indicates that it arises mainly from the $1p_{3/2}$ neutron intruder configuration. This demonstrates that the island of inversion around $N=20$ includes $^{28}$F, and most probably $^{29}$F, and suggests that $^{28}$O is not doubly magic.
description: 6 pages, 3 figures, Supplemental Material, accepted for publication in Physical Review Letters
A LOCATIONAL ANALYSIS OF LANDSCAPE PLANT RETAIL OUTLETS IN GEORGIA
Creators: name: McClellan, Chandler
name: Turner, Steven C.
name: Gunter, Lewell F.
name: Stegelin, Forrest E.
name: McClellan, Chandler
name: Turner, Steven C.
name: Gunter, Lewell F.
name: Stegelin, Forrest E.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Marketing
subject: FOS: Economics and business

description: GIS is an emerging marketing tool. This study examines the Georgian landscape plant retail market using GIS in conjunction with other traditional market research tools. Spending and logistic regression propensity scores are analyzed for prevailing geographic patterns. This allows retailers to make store location decisions by identifying underserved markets.
Towards a more individualised support of science competition participants – identification and examination of participant profiles based on cognitive and affective characteristics
Creators: name: Tschisgale, Paul
name: Steegh, Anneke
name: Kubsch, Marcus
name: Petersen, Stefan
name: Neumann, Knut
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: student characteristics
subject: individualised support
subject: science competitions
subject: Physics Olympiad
subject: latent profile analysis
subject: 500 Naturwissenschaften und Mathematik::500 Naturwissenschaften::507 Ausbildung, Forschung, verwandte Themen

description: Science competitions target students interested in science with the aim to support them in developing science competence and career aspirations. Contrary to the common belief that science competition participants are exceptionally competent and strongly motivated to pursue a science career, there is growing evidence that the entirety of participants is rather heterogeneous in terms of their cognitive and affective characteristics. For science competitions to better support all participants in developing competence and career aspirations, a better understanding of the cognitive and affective characteristics of the entirety of participants is required. This study examined the Physics Olympiad as a specific type of science competitions, leading to a nuanced characterisation of N = 155 Physics Olympiad participants. Latent profile analyses revealed four participant profiles distinguished by specific patterns in cognitive abilities, physics interest, and physics self-efficacy. Profiles differed in their performance in the competition and their physics career aspiration. Grade level, gender, previous participation in the competition, and teacher support explained differences in profile membership. Our findings emphasise that Physics Olympiad participants are a heterogeneous group with varying needs and offer implications for more individualised support activities to better support the entirety of participants in developing science competence and career aspirations.
Finitely connected vector spin systems with random matrix interactions
Creators: name: Coolen, A.
name: Skantzos, N. S.
name: Castillo, I. Perez
name: Vicente, C. J. Perez
name: Hatchett, J. P. L.
name: Wemmenhove, B.
name: Nikoletopoulos, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We use finite connectivity equilibrium replica theory to solve models of finitely connected unit-length vectorial spins, with random pair-interactions which are of the orthogonal matrix type. Since the spins are continuous and the connectivity c remains finite in the thermodynamic limit, the replica-symmetric order parameter is a functional. The general theory is developed for arbitrary values of the dimension d of the spins, and arbitrary choices of the ensemble of random orthogonal matrices. We calculate phase diagrams and the values of moments of the order parameter explicitly for d=2 (finitely connected XY spins with random chiral interactions) and for d=3 (finitely connected classical Heisenberg spins with random chiral interactions). Numerical simulations are shown to support our predictions quite satisfactorily.
description: 28 pages, 16 eps figures, submitted to J. Phys. A
Aspects of phi-meson production in proton-proton collisions
Creators: name: Sibirtsev, A.
name: Haidenbauer, J.
name: Meißner, U. -G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyze near-threshold cross section data for the reaction pp->pp phi published by the DISTO collaboration and recent, still preliminary results presented by the ANKE Collaboration. We formulate a procedure to evaluate the OZI ratio at low energies by taking into account corrections from the kinematics and the final-state interaction. Combining the new data with the few measurements available at higher energies we give a limit for the OZI rule violation and estimate the possible contribution from a five-quark baryonic resonance coupled to the phi-p system.
description: 6 pages, 4 figures
Consultoría experiencia digital Fintech
Creators: name: Garzón Martínez, Paula Johanna
name: Ocampo Garay, Mónica Lizeth
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Tecnología - Aspectos sociales
subject: Organización - Estructura
subject: Mercados financieros - Estudio de casos
subject: Experiencia
subject: Servicio al cliente
subject: Soporte
subject: Análisis
subject: Tecnología

description: Teniendo en cuenta la necesidad de poner en práctica lo aprendido en la especialización realizamos una consultoría a una empresa tecnológica del sector financiero. La metodología incluyó un análisis basado en la información pública de la empresa, sus principales competidores, el sector económico, así como el segmento objetivo. Teniendo el alcance de realizar entrevistas a los colaboradores que nos permitieron tener un entendimiento de los dolores y de alguna manera oportunidades de mejora en las que podíamos enfocarnos y realizar propuestas que aportaran a mejorar dichas situaciones. Actualizar mapa de empatía, buyer persona, journey map, análisis de brechas GAP. Tuvimos la oportunidad de analizar sus canales de contacto, donde entendimos su funcionamiento actual, las métricas y sus problemáticas. Desde allí trabajamos en las propuestas de mejora y análisis de resultados con prototipos para ejecutar ajustes en la aplicación adicional propuesta de: perfiles asesores, capacitación para el equipo humano de servicio al cliente, calidad, indicadores de medición adicional a la propuesta de automatización desde el bot. Nos enfocamos en mejorar la experiencia del cliente independiente a el canal de contacto a través del cual contacte a la empresa porque en el análisis de canales identificamos que todos están centralizados en el agente.
description: Considering the need to put into practice what we learned in the specialization, we conducted a consultancy for a technology company in the financial sector. The methodology included an analysis based on public information about the company, its main competitors, the economic sector, as well as the target segment. We had the scope to conduct interviews with the collaborators, which allowed us to understand the pain points and, in some way, identify improvement opportunities on which we could focus and make proposals that would help improve these situations. We updated the empathy map, buyer persona, journey map, and GAP analysis. We had the opportunity to analyze their contact channels, where we understood their current functioning, metrics, and issues. From there, we worked on improvement proposals and result analysis with prototypes to make adjustments in the application, in addition to the proposal for: advisor profiles, training for the customer service human team, quality, measurement indicators, and the proposal for automation from the bot. We focused on improving the customer experience regardless of the contact channel through which they reach the company because in the channel analysis, we identified that all are centralized in the agent.
Electromagnetically Induced Transparency in a mono-isotopic $^{167}$Er:$^7$LiYF$_4$ crystal below 1 Kelvin
Creators: name: Kukharchyk, Nadezhda
name: Sholokhov, Dmitriy
name: Morozov, Oleg
name: Korableva, Stella L.
name: Kalachev, Alexey A.
name: Bushev, Pavel A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Electromagnetically induced transparency allows for controllable change of absorption properties which can be exploited in a number of applications including optical quantum memory. In this paper, we present a study of the electromagnetically induced transparency in $^{167}$Er:$^6$LiYF$_4$ crystal at low magnetic fields and ultra-low temperatures. Experimental measurement scheme employs optical vector network analysis which provides high precision measurement of amplitude, phase and pulse delay. We found that sub-Kelvin temperatures are the necessary requirement for studying electromagnetically induced transparency in this crystal at low fields. A good agreement between theory and experiment is achieved taking into account the phonon bottleneck effect.
description: 8 pages, 5 figures
Active pooling design in group testing based on Bayesian posterior prediction
Creators: name: Sakata, Ayaka
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In identifying infected patients in a population, group testing is an effective method to reduce the number of tests and correct the test errors. In the group testing procedure, tests are performed on pools of specimens collected from patients, where the number of pools is lower than that of patients. The performance of group testing heavily depends on the design of pools and algorithms that are used in inferring the infected patients from the test outcomes. In this paper, an adaptive design method of pools based on the predictive distribution is proposed in the framework of Bayesian inference. The proposed method executed using the belief propagation algorithm results in more accurate identification of the infected patients, as compared to the group testing performed on random pools determined in advance.
MILL-LEVEL PRICE ESTIMATES FOR U.S. COTTON QUALITY
Creators: name: Lyford, Conrad P.
name: Jung, Sangnyeol
name: Ethridge, Don E.
name: Lyford, Conrad P.
name: Jung, Sangnyeol
name: Ethridge, Don E.
Publisher: name: Unknown
Year: 2004
Subjects: Demand and Price Analysis

description: The mill-level prices for cotton quality are examined to develop information about price-quality relationships of U.S. cotton. By using data from daily cotton contracts along with spot market price information, the premiums and discounts attributed to heterogeneous quality characteristics are estimated for several marketing years by major production regions.
description: Replaced with revised version of paper 02/11/04.
From fundamental physics to tests with compact objects in metric-affine theories of gravity
Creators: name: Rubiera-Garcia, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work provides a short but comprehensible overview of some relevant aspects of metric-affine theories of gravity in relation to the physics and astrophysics of compact objects. We shall highlight the pertinence of this approach to supersede General Relativity on its strong-field regime, as well as its advantages and some of its difficulties. Moreover, we shall reflect on the present and future opportunities to testing its predictions with relativistic and non-relativistic stars, black holes, and other exotic horizonless compact objects.
description: 12 double column pages, 2 figures, Contribution to Selected Papers of the Fifth Amazonian Symposium on Physics, accepted in IJMPD
DECLINING OGALLALA AQUIFER AND TEXAS PANHANDLE ECONOMY
Creators: name: Almas, Lal K.
name: Colette, W. Arden
name: Wu, Zhen
name: Almas, Lal K.
name: Colette, W. Arden
name: Wu, Zhen
Publisher: name: Unknown
Year: 2004
Subjects: Resource /Energy Economics and Policy

description: The Texas Panhandle is one of the most unique and diversified agricultural areas in the world. Production agriculture contributes $3.41 billion in value-added production and more than $6.32 billion in economic activity annually. Eighty-five percent of the state's fed beef, 45.8 percent of the wheat, 61.9 percent of the corn, and 23.0 percent of the sorghum are produced in the region. The growing livestock industry has accelerated the demand for feed grains in the area and has increased irrigation water demand. The Ogallala Aquifer is the primary source of irrigation water in the region. The depletion of the Ogallala by the excessive pumping of water is threatening the rural economy of the area. There is a critical need for developing sound water management policies that may result in balancing utilization and extending the life of the Ogallala to sustain the rural economies. Greater efficiency from the application of irrigation water through effective water management strategies and reallocation to higher value products can greatly reduce the rate of decline of the rural community and stabilize the availability of services in the area. The development of value added industries and transportation and distribution centers, and the expansion of medical and retirement facilities could significantly increase job availability and add stability to the rural communities.