cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Medición de la contribución de la bioeconomía en América Latina: caso Cuba
Creators: name: Rangel-Cura, Raúl A.
name: Zúniga-González, Carlos Alberto
name: Colón-García, Adelfa Patricia
name: Losilla-Solano, Luis
name: Berrios, Roberto
name: Rangel-Cura, Raúl A.
name: Zúniga-González, Carlos Alberto
name: Colón-García, Adelfa Patricia
name: Losilla-Solano, Luis
name: Berrios, Roberto
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: sistema de cuentas nacionales
subject: bioeconomía
subject: cuentas ambientales

description: La presente investigación constituye una primera aproximación para el caso de Cuba, a la medición de la contribución de la bioeconomía desde una perspectiva económica. Su desarrollo ha estado vinculado a la Red Iberoamericana de Bioeconomía y Cambio Climático (REBICAMCLI) financiada por el programa CYTED. Los datos utilizados fueron tomados en su mayoría del Anuario estadístico de Cuba, principal publicación de la Oficina Nacional de Estadística e Información (ONEI), donde se recogen las estadísticas oficiales del país. El año base que se toma para los análisis es 1997, que es el que se reconoce hasta la fecha como referencia oficial en el Sistema de Cuentas Nacionales. No obstante, dada la necesidad de cambiar el año base cada cierto tiempo, se conoce que éste está aún en proceso de cambio. Esta primera aproximación muestra un muy bajo nivel de aporte de la bioeconomía en Cuba, para un promedio de un 4%, cifra que pudiera incrementarse de contarse con una información más detallada a nivel del Sistema de Cuentas Nacionales. En cuanto a los factores que condicionan este bajo aporte, están problemas estructurales de la economía, como la doble circulación monetaria, las distorsiones de precios, los subsidios a la producción en el sector agrícola, entre otros.
Solitary Wave Interactions In Dispersive Equations Using Manton's Approach
Creators: name: Kevrekidis, P. G.
name: Khare, Avinash
name: Saxena, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We generalize the approach first proposed by Manton [Nuc. Phys. B {\bf 150}, 397 (1979)] to compute solitary wave interactions in translationally invariant, dispersive equations that support such localized solutions. The approach is illustrated using as examples solitons in the Korteweg-de Vries equation, standing waves in the nonlinear Schr{ö}dinger equation and kinks as well as breathers of the sine-Gordon equation.
description: 5 pages, 4 figures, slightly modified version to appear in Phys. Rev. E
Análisis de la agenda pública y privada de la Bioeconomía en Centroamérica y el Caribe: Estudios de Caso de El Salvador, Honduras, Cuba y Nicaragua
Creators: name: Marinero-Orantes, Edgar Antonio
name: Vargas-Cañas, José Isidro
name: Guman, Catari
name: Sardiñas-Gómez, Orestes F.
name: Zúniga-González, Carlos Alberto
name: Marinero-Orantes, Edgar Antonio
name: Vargas-Cañas, José Isidro
name: Guman, Catari
name: Sardiñas-Gómez, Orestes F.
name: Zúniga-González, Carlos Alberto
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Políticas Sectoriales
subject: Sectores productivos de la Bioeconomía
subject: Recursos Naturales
subject: Normativas
subject: Leyes.

description: This work focused on investigating the policies governments are implementing to develop the bio-economy in the countries of El Salvador, Honduras, Nicaragua and Cuba. We used the case study methodology, where specialists Bioeconomy Network and Change Climate where the situation of political and policy addresses that governments have been implemented. The research provides results in the need to gradually introduce the topic of the Bioeconomy in public and private agenda of the paths of the bio-economy as an alternative to the rural communities to respond to variations of climate change and increasing demand for food and fiber that assumes exponential population growth. The research work was organized as follows: Sectoral policies and standards regulatory of the Bioeconomy: Case El Salvador that address the country's specialist group El Salvador is the second case Agenda of public and private policy for the bio-economy: case Honduras made by the specialist group of Honduras country, the third case Policies Public for the Bioeconomy in Cuba by specialists from Cuba and country group Nicaragua finally referring policy on the subject is being promoted.
Poverty in Mexico: Vulnerability factor for face the effects of climate change.
Creators: name: Mérida-Martínez, Y
name: Acuña-Gamboa, L. A
name: Mérida-Martínez, Y
name: Acuña-Gamboa, L. A
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Resource /Energy Economics and Policy
subject: Pobreza
subject: vulnerabilidad
subject: variación climática
subject: política pública
subject: adaptación.

description: Los niveles de pobreza que se presentan en México constituyen una problemática que se agudiza cada vez más en las diferentes escalas territoriales. La escasez de recursos económicos para el acceso a bienes, servicios y el factor cultural, constituyen la principal restricción para acceder a un nivel de vida adecuado, el cual proporcione condiciones integrales de seguridad en la población. Dicha condición resulta un factor determinante en la imposibilidad para hacer frente a los distintos fenómenos hidrometeorológicos y geológicos que se presentan como parte de las alteraciones climáticas en el sistema terrestre, situación que vulnera a la población en condición de pobreza a padecer los estragos en todas sus dimensiones: física, económica y social. El cambio climático, visto como un proceso que ha venido agudizándose debido a la actividad antrópica en las diferentes escalas territoriales, debilita la capacidad de respuesta y prevención de desastres ocasionados por éste, no sólo en los grupos vulnerables, más bien, en la intervención de las instancias gubernamentales, lo que conlleva a momentos de inestabilidad política, económica y social en los diferentes niveles de actuación (local, estatal y nacional)
Topological pumping assisted by Bloch oscillations
Creators: name: Ke, Yongguan
name: Hu, Shi
name: Zhu, Bo
name: Gong, Jiangbin
name: Kivshar, Yuri
name: Lee, Chaohong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Adiabatic quantum pumping in one-dimensional lattices is extended by adding a tilted potential to probe better topologically nontrivial bands. This extension leads to almost perfectly quantized pumping for an arbitrary initial state selected in a band of interest, including Bloch states. In this approach, the time variable offers not only a synthetic dimension as in the case of the Thouless pumping, but it assists also in the uniform sampling of all momenta due to the Bloch oscillations induced by the tilt. The quantized drift of Bloch oscillations is determined by a one-dimensional time integral of the Berry curvature, being effectively an integer multiple of the topological Chern number in the Thouless pumping. Our study offers a straightforward approach to yield quantized pumping, and it is useful for probing topological phase transitions.
description: 13 pages, 12 figures
Changing social paradigm of life insurance consumers: A study in Visakhapatnam city of Andhra Pradesh
Creators: name: Muramalla, Venkata Sai Srinivasa Rao
Publisher: name: figshare
Year: 2020
Subjects: subject: 140207 Financial Economics
subject: FOS: Economics and business
subject: 140206 Experimental Economics
subject: 140210 International Economics and International Finance

description: Life Insurance
Analysis of safety and productivity of power supply in the electrical system of Nicaragua in the period from 2010 to 2018.
Creators: name: Blanco-Orozco, Napoleón
name: Zúniga-González, Carlos Alberto
name: Torres Jaime, Jaime
name: Arce-Díaz, Eduardo
name: Martínez-Andrade, Erick
name: Dios-Palomares, Rafaela
name: Quiros-Magrigal, Olman José
name: Colon-García, Adelfa Patricia
name: Hernández-Rueda, Mauricio
name: Blanco-Orozco, Napoleón
name: Zúniga-González, Carlos Alberto
name: Torres Jaime, Jaime
name: Arce-Díaz, Eduardo
name: Martínez-Andrade, Erick
name: Dios-Palomares, Rafaela
name: Quiros-Magrigal, Olman José
name: Colon-García, Adelfa Patricia
name: Hernández-Rueda, Mauricio
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Productivity Analysis
subject: Resource /Energy Economics and Policy
subject: : Índices de Malmquist
subject: Productividad
subject: Energía eléctrica

description: El propósito de este estudio fue el de estudiar la seguridad y productividad del suministro de energía eléctrica en el sistema eléctrico de Nicaragua en el periodo desde el año 2010 hasta el 2018 utilizando el Indicador Stirling, indicador margen de reserva, indicador pérdida del mayor generador, el indicador de concentración de mercado y herramienta metodológica de análisis envolvente de datos (DEA) y los índices de Malmquist. Se estudió el comportamiento del sector energético de Nicaragua, en el periodo 2005 – 2013. Como resultado del indicador Stirling se obtuvo, que Nicaragua en estos momentos cuenta con seguridad en el sistema eléctrico, Del indicador margen de reserva se obtuvo como resultado, que el nivel de seguridad desde el punto de evaluación de este indicador el sistema cuenta con la suficiente seguridad como para no incurrir en afectaciones a los consumidores finales, Como resultado del indicador pérdida del mayor generador (LU), concluye en que se posee un sistema seguro. Por otra parte, El índice de concentración de mercado mostro que Nicaragua no posee un mercado energético competitivo. En la evaluación de productividad del uso de recursos energéticos se encontró que solo el uso de biomasa presenta un ritmo promedio anual de crecimiento de productividad.
The formation and survival of the Milky Way's oldest stellar disk
Creators: name: Xiang, Maosheng
name: Rix, Hans-Walter
name: Yang, Hang
name: Liu, Jifeng
name: Huang, Yang
name: Frankel, Neige
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It remains a mystery when our Milky Way first formed a stellar disk component that survived and maintained its disk structure from subsequent galaxy mergers. We present a study of the age-dependent structure and star formation rate of the Milky Way's disk using high-alpha stars with significant orbital angular momentum that have precise age determinations. Our results show that the radial scale length is nearly independent of age, while the vertical scale height experienced dramatic evolution. A disk-like geometry presents even for populations older than 13 Gyr, with the scale height-to-length ratio dropping below 0.5 for populations younger than 12.5 Gyr. We dub the oldest population that has maintained a disk geometry - apparently formed over 13 Gyr ago - PanGu. With an estimated present-day stellar mass of $2 \times 10^9$ $M_\odot$, PanGu is presumed to be a major stellar component of our Galaxy in the earliest epoch. The total present-day stellar mass of the whole high-alpha disk is $2 \times 10^{10}$ $M_\odot$, mostly formed during a distinct star formation rate peak of 11 $M_\odot$ per year around 11 Gyrs ago. A comparison with Milky Way analogs in the TNG50 simulations implies that our Galaxy has experienced an exceptionally quiescent dynamical history, even before the Gaia-Enceladus merger.
description: Published in Nature Astronomy on 10 October, 2024; This manuscript is the accepted version
Flexibility regarding positive and negative characteristics in potential intimate partners
Creators: name: Valente, Maria
Publisher: name: University of British Columbia
Year: 2010

description: In addressing partner selection and the development of intimate relationships, previous studies have examined mainly positive characteristics. The purpose of this study was to investigate and compare the importance and flexibility of positive and negative characteristics in partner selection. Specifically, this study investigated the importance of positive characteristics in facilitating the development of intimate relationships. Furthermore, this study examined the importance of negative characteristics in deterring the development of intimate relationships. Flexibility regarding both positive and negative characteristics was also explored. Results of this study demonstrate that a negative relationship exists between the importance and flexibility of positive characteristics, while a positive relationship exists between the importance and flexibility of negative characteristics. In regards to partner selection, negative characteristics were found to be more important than positive characteristics. Differences between males and females were noted.
Studies of thermal conductivity in Fermi-Pasta-Ulam like lattices
Creators: name: Lepri, Stefano
name: Livi, Roberto
name: Politi, Antonio
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The pioneering computer simulations of the energy relaxation mechanisms performed by Fermi, Pasta and Ulam can be considered as the first attempt of understanding energy relaxation and thus heat conduction in lattices of nonlinear oscillators. In this paper we describe the most recent achievements about the divergence of heat conductivity with the system size in 1d and 2d FPU-like lattices. The anomalous behavior is particularly evident at low energies, where it is enhanced by the quasi-harmonic character of the lattice dynamics. Remakably, anomalies persist also in the strongly chaotic region where long--time tails develop in the current autocorrelation function. A modal analysis of the 1d case is also presented in order to gain further insight about the role played by boundary conditions.
description: Invited article to appear in the Chaos focus issue on "Studies of Nonlinear Problems. I" by Enrico Fermi, John Pasta, and Stanislaw Ulam"
ZAHLUNGSBEREITSCHAFT FÜR TIERWOHL
Creators: name: Petershammer, Silke
name: Dahlhausen, Johanna
name: Roosen, Jutta
name: Petershammer, Silke
name: Dahlhausen, Johanna
name: Roosen, Jutta
Publisher: name: Unknown
Year: 2016
Subjects: Consumer/Household Economics

description: Die Politik und die Verbraucher wünschen sich Änderungen in den Tierhaltungsbedingungen. Doch ein Mehr an Tierwohl verursacht auch höhere Kosten. Deshalb stellt sich die Frage nach der Zahlungsbereitschaft der Konsumenten für höhere Tierwohlstandards. Ziel dieser Studie ist es herauszufinden, wie die Präferenzen für Tierwohlstandards am sinnvollsten gemessen werden können. Zusammenfassend ist ersichtlich, dass eine hypothetische Zahlungsbereitschaft für Produkte aus artgerechterer Haltung gegeben ist. Dabei können die Studien, die eine Zahlungsbereitschaft für ein Label untersuchen, nur eine allgemeine Aussage treffen, welche Veränderungen sich der Verbraucher konkret wünscht, bleibt unklar. Die Studien, die konkrete Haltungsbedingungen betrachten, können ein differenzierteres Bild geben.
Lifshitz Transition in Triangular Lattice Kondo-Heisenberg Model
Creators: name: Zhang, Lan
name: Luo, Hong-Gang
name: Zhong, Yin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by recent experimental progress on triangular lattice heavy-fermion compounds, we investigate possible Lifshitz transitions and the scanning tunnel microscope (STM) spectra of the Kondo-Heisenberg model on the triangular lattice. In the heavy Fermi liquid state, the introduced Heisenberg antiferromagnetic interaction ($J_H$) results in the twice Lifshitz transition at the case of the nearest-neighbour electron hopping but with next-nearest-neighbour hole hopping and the case of the nearest-neighbour hole hopping but with next-nearest-neighbour electron hopping, respectively. Driven by $J_H$, the Lifshitz transitions on triangular lattice are all continuous in contrast to the case in square lattice. Furthermore, the STM spectra shows rich line-shape which is influenced by the Kondo coupling $J_{K}$, $J_{H}$ and the ratio of the tunneling amplitude $t_{f}$ versus $t_{c}$. Our work provides a possible scenario to understand the Fermi surface topology and the quantum critical point in heavy-fermion compounds.
description: 7 pages, 10 figures
Breakthrough opportunities and competitive advantages of FMCG markets in India
Creators: name: Muramalla, Venkata Sai Srinivasa Rao
Publisher: name: figshare
Year: 2020
Subjects: subject: 140206 Experimental Economics
subject: FOS: Economics and business
subject: 140207 Financial Economics

description: fast moving consumer goods
On Some Classes of mKdV Periodic Solutions
Creators: name: Kevrekidis, P. G.
name: Khare, Avinash
name: Saxena, A.
name: Herring, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We obtain exact periodic solutions of the positive and negative modified Kortweg-de Vries (mKdV) equations. We examine the dynamical stability of these solitary wave lattices through direct numerical simulations. While the positive mKdV breather lattice solutions are found to be unstable, the two-soliton lattice solution of the same equation is found to be stable. Similarly, a negative mKdV lattice solution is found to be stable. We also touch upon the implications of these results for the KdV equation.
description: 8 pages, 3 figures, to appear in J. Phys. A
MESSUNG DES VERMARKTUNGSERFOLGES BEI MARKTFRUCHTBAUBETRIEBEN: WIE GROß SIND DIE UNTERSCHIEDE?
Creators: name: Holzer, Patrick
name: Loy, Jens-Peter
name: Holzer, Patrick
name: Loy, Jens-Peter
Publisher: name: Unknown
Year: 2016
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty
subject: Vermarktung
subject: Weizen
subject: Benchmarking
subject: t-Test
subject: Ordered Probit

description: Starke saisonale Schwankungen der Erzeugerpreise von Weizen und Raps deuten auf ein vermeintlich hohes Potenzial einer Optimierung des Verkaufszeitpunktes hin. In diesem Beitrag betrachten wir die Verkaufserlöse bei Winterweizen von 204 Betrieben aus Norddeutschland über einen Zeitraum von 12 Jahren, um Unterschiede bei der Vermarktung zu analysieren. Der Vergleich mit zwei in der Praxis angewendeten Benchmarks zeigt, dass es systematisch überdurchschnittlich erfolgreiche Betriebe gibt. Allerdings schaffen es auch diese Betriebe nicht, einen höheren Erlös als bei einer simplen kontinuierlichen Verkaufsstrategie zu generieren.
title: Superstars im Kriegsgebiet? Über die ambivalenten Fotografien von The Clash in Belfast 1977
Creators: name: Röleke, Juliane
Publisher: name: ZZF - Centre for Contemporary History: Zeitgeschichte online
Year: 2021

description: Mehrere Männer und Jungen werden an einem Militärcheckpoint kontrolliert, ließe sich auf den ersten Blick über obiges Foto festhalten. Im Zentrum des Bildes steht ein Mann in Lederjacke, zerissenem Netzhemd über der nackten Brust, enger Hose und Springerstiefeln, der die Kontrolle bereits durchlaufen hat und einen bewaffneten Soldaten passiert, der wiederum auf sein Gewehr gestützt am linken Bildrand zu sehen ist. Dass es sich bei zwei der Personen auf dem Foto jedoch um Mitglieder der britischen Punkband The Clash und damit international gefeierte Stars der Musikszene jener Jahre handelte, verändert die Wahrnehmung des Bildes grundlegend: Es ist ein Beispiel für den auswärtigen Blick auf eine von Gewalt geprägte Gesellschaft und die visuelle Konstruktion verschiedener Männlichkeiten darin.
Spectroscopic confirmation of high-redshift supernovae with the ESO VLT
Creators: name: Lidman, C.
name: Howell, D. A.
name: Folatelli, G.
name: Garavini, G.
name: Nobili, S.
name: Aldering, G.
name: Amanullah, R.
name: Antilogus, P.
name: Astier, P.
name: Blanc, G.
name: Burns, M. S.
name: Conley, A.
name: Deustua, S. E.
name: Doi, M.
name: Ellis, R.
name: Fabbro, S.
name: Fadeyev, V.
name: Gibbons, R.
name: Goldhaber, G.
name: Goobar, A.
name: Groom, D. E.
name: Hook, I.
name: Kashikawa, N.
name: Kim, A. G.
name: Knop, R. A.
name: Lee, B. C.
name: Mendez, J.
name: Morokuma, T.
name: Motohara, K.
name: Nugent, P. E.
name: Pain, R.
name: Perlmutter, S.
name: Prasad, V.
name: Quimby, R.
name: Raux, J.
name: Regnault, N.
name: Ruiz-Lapuente, P.
name: Sainton, G.
name: Schaefer, B. E.
name: Schahmaneche, K.
name: Smith, E.
name: Spadafora, A. L.
name: Stanishev, V.
name: Walton, N. A.
name: Wang, L.
name: Wood-Vasey, W. M.
name: Yasuda, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts. From the spectra alone, 20 candidates are spectrally classified as SNe Ia with redshifts ranging from z=0.212 to z=1.181. Of the remaining 19 candidates, 1 might be a Type II supernova and 11 exhibit broad supernova-like spectral features and/or have supernova-like light curves. The candidates were discovered in 8 separate ground-based searches. In those searches in which SNe Ia at z ~ 0.5 were targeted, over 80% of the observed candidates were spectrally classified as SNe Ia. In those searches in which SNe Ia with z > 1 were targeted, 4 candidates with z > 1 were spectrally classified as SNe Ia and later followed with ground and space based observatories. We present the spectra of all candidates, including those that could not be spectrally classified as supernova.
description: 30 pages, 43 figures. Accepted by A&A. A version with higher resolution finding charts is available at http://supernova.lbl.gov/
Energy Levels, Transition Rates and Electron Impact Excitation Rates for B-like Kr XXXII
Creators: name: Li, Yanting
name: Si, Ra
name: Li, Jinqing
name: Zhang, Chunyu
name: Yao, Ke
name: Wang, Kai
name: Gu, Mingfeng
name: Chen, Chongyang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Energy levels and transition rates for electric-dipole, electric-quadrupole, electric-octupole, magnetic-dipole, and magnetic-quadrupole transitions among the levels arising from the $n\ \leq$ 5 configurations in B-like Kr XXXII are calculated by using two state-of-the-art methods, namely, the multi-configuration Dirac-Hartree-Fock (MCDHF) approach and the second-order many-body perturbation theory (RMBPT). Our results are compared with several available experimental and other theoretical values. Electron-impact excitation (EIE) collision strengths are calculated via the independent process and isolated resonance approximation using distorted-wave (denoted by IPIRDW). Radiation damping effects on the resonance excitation contributions are included. Effective collision strengths are calculated as a function of electron temperature by assuming a Maxwellian electron velocity distribution. Spectral line intensities are modeled by using collision radiative model, and several line pairs pointed out might be useful for density diagnostics.
Supermassive Binary Black Hole Evolution can be traced by a small SKA Pulsar Timing Array
Creators: name: Feng, Yi
name: Li, Di
name: Zheng, Zheng
name: Tsai, Chao-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Supermassive black holes are commonly found in the center of galaxies and evolve with their hosts. The supermassive binary black holes (SMBBH) are thus expected to exist in close galaxy pairs, however, none has been unequivocally detected. The square kilometre array (SKA) is a multi-purpose radio telescope with a collecting area approaching 1 million square metres, with great potential for detecting nanohertz gravitational waves (GWs). In this paper, we quantify the GW detectability by SKA for a realistic SMBBH population using pulsar timing array (PTA) technique and quantify its impact on revealing SMBBH evolution with redshift for the first time. With only $\sim20$ pulsars, much smaller a requirement than in previous work, the SKA PTA is expected to obtain detection within about 5 years of operation and to achieve a detection rate of more than 100 SMBBHs/yr after about 10 years. Although beyond the scope of this paper, we must acknowledge that the presence of persistent red noise will reduce the number of expected detections here. It is thus imperative to understand and mitigate red noise in the PTA data. The GW signatures from a few well-known SMBBH candidates, such as OJ 287, 3C 66B, NGC 5548 and Ark 120, will be detected given the currently best-known parameters of each system. Within 30 years of operation, about 60 individual SMBBHs detection with $z<0.05$ and more than $10^4$ with $z<1$ are expected. The detection rate drops precipitately beyond $z=1$. The substantial number of expected detections and their discernible evolution with redshift by SKA PTA will make SKA a significant tool for studying SMBBHs.
description: Accepted by Physical Review D
Theoretical Principles of Single-Molecule Electronics: A Chemical and Mesoscopic View
Creators: name: Xue, Yongqiang
name: Ratner, Mark A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Exploring the use of individual molecules as active components in electronic devices has been at the forefront of nanoelectronics research in recent years. Compared to semiconductor microelectronics, modeling transport in single-molecule devices is much more difficult due to the necessity of including the effects of the device electronic structure and the interface to the external contacts at the microscopic level. Theoretical formulation of the problem therefore requires integrating the knowledge base in surface science, electronic structure theory, quantum transport and device modeling into a single unified framework starting from the first-principles. In this paper, we introduce the theoretical framework for modeling single-molecule electronics and present a simple conceptual picture for interpreting the results of numerical computation. We model the device using a self-consistent matrix Green's function method that combines Non-Equilibrium Green's function theory of quantum transport with atomic-scale description of the device electronic structure. We view the single-molecule device as "heterostructures" composed of chemically well-defined atomic groups, and analyze the device characteristics in terms of the charge and potential response of these atomic groups to perturbation induced by the metal-molecule coupling and the applied bias voltage. We demonstrate the power of this approach using as examples devices formed by attaching benzene-based molecules of different size and internal structure to the gold electrodes through sulfur end atoms.
description: To appear in International Journal of Quantum Chemistry, Special Issue in memory of J.A. Pople. 13 pages, 9 figures
title: Primary Teachers' Understandings Of The Nature Of Science And The Purposes Of Science Education
Creators: name: Lunn, Stephen Andrew
Publisher: name: The Open University
Year: 2000

description: With the introduction of the National Curriculum in English primary schools in the late 1980s, the status of science changed from discretionary option, taught to the teacher’s strengths, to mandated core subject with tightly defined curriculum. During the first few years, teachers’ initial uncertainty gave way to growing feelings of competence and confidence, which local, national and international evidence from the mid- 1990s onwards shows were not entirely misplaced. Meanwhile, however, a series of studies consistently showed apparently severe gaps in primary teachers’ science knowledge – so what was it that was changing? Teachers themselves hold the key to understanding how science has been accommodated into primary practice: this research looks at some teachers’ views of the nature of science and the purposes of teaching it, the manifestation of such views in planning and teaching; changes in views over time: and the accommodation of science teaching into their professional identities. Drawing on a 1996 pilot study, the research involves case studies of five teachers - biographical and semi-structured interviews, protocol analysis, and lesson observations, over eighteen months from early 1998, a questionnaire survey of a broader sample; and triangulation between case studies and survey. Various factors that may underlie a teacher’s view of the nature of science are proposed - scientism, naive empiricism, new-age-ism, constructivism, pragmatism, and scepticism. It is suggested that teachers’ accommodation of science into their practice can involve its structural and organisational interweaving into the fabric of their professional identities. A tentative hypothetical model is outlined, of the emergence of professional identity from an autopoietic network involving auto-biography; values; dispositions; beliefs; personal theories; self-image; knowledge of and relationships and discourse with children and colleagues; curriculum, subject and pedagogic knowledge: images of teaching and learning; the exercise of agency in practice; and reflexive connections between, and reflection upon, these.
The role of women in the social and ecological resilience of San Felipe’s fisheries
Creators: name: Liguori, Lisa Avigdor
Publisher: name: University of British Columbia
Year: 2010

description: This thesis focuses on the success achieved by a newly formed women's fishing cooperative in San Felipe, Yucatan, in Mexico. Examining the ways in which this cooperative has been able to identify and embrace new opportunities and find creative solutions to problems reveals that much of their success stems from a capacity to break and continuously remake local rules, wherein a dynamic balance of attention between social and ecological factors is achieved. In this case, long traditions of local resource management, self-enforcement, and personal interpretation of the rules have allowed for a blending of tradition and change-tolerant resilience. In recent years, women's participation in both fishing and conservation has been a catalyst for social change within their port. This ethnographic study provides insight into how women in San Felipe have become central to decisions affecting resource management. In diverse areas such as the octopus fishery, mangrove conservation, and the social policing of outsiders in the community, fisherwomen's informal influence is often as powerful as decisions made by official institutions. In some cases, the very nature of fisherwomen's unobtrusive rule breaking and subtle enforcement allows them to push boundaries in ways that would not be tolerated otherwise. As a result, constant negotiations of power and subtle testing of social rules have allowed fisherwomen to blur traditional boundaries of gender, race, and class, allowing them access to opportunities from which they would normally be excluded.
Auto-Tuning Spectral Clustering for Speaker Diarization Using Normalized Maximum Eigengap
Creators: name: Park, Tae Jin
name: Han, Kyu J.
name: Kumar, Manoj
name: Narayanan, Shrikanth
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In this study, we propose a new spectral clustering framework that can auto-tune the parameters of the clustering algorithm in the context of speaker diarization. The proposed framework uses normalized maximum eigengap (NME) values to estimate the number of clusters and the parameters for the threshold of the elements of each row in an affinity matrix during spectral clustering, without the use of parameter tuning on the development set. Even through this hands-off approach, we achieve a comparable or better performance across various evaluation sets than the results found using traditional clustering methods that apply careful parameter tuning and development data. A relative improvement of 17% in the speaker error rate on the well-known CALLHOME evaluation set shows the effectiveness of our proposed spectral clustering with auto-tuning.
description: in IEEE Signal Processing Letters, 2020
Excited-State Adiabatic Quantum Computation Started with Vacuum States
Creators: name: Goto, Hayato
name: Kanao, Taro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Adiabatic quantum computation (AQC), which is particularly useful for combinatorial optimization, becomes more powerful by using excited states, instead of ground states. However, the excited-state AQC is prone to errors due to dissipation. Here we propose the excited-state AQC started with the most stable state, i.e., the vacuum state. This counterintuitive approach becomes possible by using a driven quantum system, or more precisely, a network of Kerr-nonlinear parametric oscillators (KPOs). By numerical simulations, we show that some hard instances, where standard ground-state AQC with KPOs fails to find their optimal solutions, can be solved by the present approach, where nonadiabatic transitions are rather utilized. We also show that the use of the vacuum state as an initial state leads to robustness against errors due to dissipation, as expected, compared to the use of a really excited (nonvacuum) state as an initial state. Thus, the present work offers new possibilities for quantum computation and driven quantum systems.
description: 7 pages, 3 figures
Topology of quasiperiodic functions on the plane
Creators: name: Dynnikov, I.
name: Novikov, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Dynamical Systems (math.DS)
subject: Other Condensed Matter (cond-mat.other)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The article describes a topological theory of quasiperiodic functions on the plane. The development of this theory was started (in different terminology) by the Moscow topology group in early 1980s. It was motivated by the needs of solid state physics, as a partial (nongeneric) case of Hamiltonian foliations of Fermi surfaces with multivalued Hamiltonian function. The unexpected discoveries of their topological properties that were made in 1980s and 1990s have finally led to nontrivial physical conclusions along the lines of the so-called geometric strong magnetic field limit. A very fruitful new point of view comes from the reformulation of that problem in terms of quasiperiodic functions and an extension to higher dimensions made in 1999. One may say that, for single crystal normal metals put in a magnetic field, the semiclassical trajectories of electrons in the space of quasimomenta are exactly the level lines of the quasiperiodic function with three quasiperiods that is the dispersion relation restricted to a plane orthogonal to the magnetic field. General studies of the topological properties of levels of quasiperiodic functions on the plane with any number of quasiperiods were started in 1999 when certain ideas were formulated for the case of four quasiperiods. The last section of this work contains a complete proof of these results. Some new physical applications of the general problem were found recently.
description: latex2e, 27 pages, 7 figures
Framework for a Decentralized Web
Creators: name: Singh, Raman
name: Donegan, Andrew
name: Tewari, Hitesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Over the past decade, we have witnessed the Internet becoming increasingly centralized in the hands of a small number of giant technology firms, that control many of the most popular applications and the content they host on their platforms. In addition, in the majority of instances today, access to the Internet is usually provided through local internet service providers (ISPs) in each country. Governments in different jurisdictions can exert pressure on these technology firms and ISPs to enforce restrictions on Internet usage by their citizens, such as the blocking access to certain sites and/or content. In this paper, we present a promising new approach to circumventing some of these issues. Our decentralized web (DWeb) proposal makes use of a mesh network to connect community based routers. In addition, objects on the DWeb are indexed using Bblockchain technology, which allows for secure storage of immutable object references, and integrity checking of the data being served to users. Our DWeb design is also capable of operating during network partitions, and is able to quickly re-synchronize with the larger network once connectivity has been restored.
description: 7 pages
البيئه والغذاء : التحديات والممكنات
Creators: name: Soliman, Ibrahim
name: Soliman, Ibrahim
Publisher: name: Unknown
Year: 1999
Subjects: Environmental Economics and Policy
Food Security and Poverty

description: The environment and food relations are highly complicated and interrelated with so any development issues. Therefore, this study presented the subject, in sequences, under several dimensions. These dimensions are (1) Environment and food production. This dimension covers some aspects, which are the land resources and food production, internal lakes and food production, water resources and food production, weather changes and food production, and also the industrial development and food production. (2) The environmental standards and foreign trade of food, which includes the following aspects (packaging standards, environmental taxes and penalties, environmental labeling systems, and ISO-14000 series. (3) Organic fertilizers as new opportunities for food exports development of developing counties. (4) An analytical presentation of the environmental agreements approved by WTO members, which are the technical standards agreement and sanitary and phyto-sanitary agreement, (5) The advantages and disadvantages of applying e unique international food trade standards. (6)The last issue is the social appraisal for the impacts of food market's control systems.
description: "، مجلد المؤتمر التاسع للاقتصاديين الزراعيين عن "التكنولوجيا والزراعة المصرية في القرن الحادي والعشرين" تنظمه الجمعية المصرية للاقتصاد الزراعي، نادى الزراعيين، الدقى، القاهرة، مصر ص 1–14
Supplementary material from Social environment influences termination of nomadic migration
Creators: name: Robart, Ashley R.
name: Zuñiga, Hilary X.
name: Navarro, Guillermo
name: Watts, Heather E.
Publisher: name: The Royal Society
Year: 2022
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Supplementary methods and results
Molecular-beam epitaxy of (Zn,Mn)Se on Si(100)
Creators: name: Slobodskyy, T.
name: Rüster, C.
name: Fiederling, R.
name: Keller, D.
name: Gould, C.
name: Ossau, W.
name: Schmidt, G.
name: Molenkamp, L. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated the growth by molecular-beam epitaxy of the II-VI diluted magnetic semiconductor (Zn,Mn)Se on As-passivated Si(100) substrates. The growth start has been optimized by using low-temperature epitaxy. Surface properties were assessed by Nomarski and scanning electron microscopy. Optical properties of (Zn,Mn)Se have been studied by photoluminescence and a giant Zeeman splitting of up to 30 meV has been observed. Our observations indicate a high crystalline quality of the epitaxial films.
description: To be published in Applied Physics Letters
Economic situation and productivity of the Polish pig holdings
Creators: name: Mirkowska, Zofia
name: Ziętara, Wojciech
name: Mirkowska, Zofia
name: Ziętara, Wojciech
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: International Development
subject: Livestock Production/Industries
subject: economic size
subject: Standard Output
subject: FADN
subject: pig stock
subject: profitability
subject: management income
subject: productivity
subject: pig holdings

description: The paper presents the situation of the Polish specialist pig holdings at the backdrop of similar holdings in Hungary, Germany, Denmark and the Netherlands. In order to study their development abilities, the following indices underwent a comprehensive assessment: productivity, profitability, management income, net investment rates and share of subsidies in the income of an agricultural holding. The highest productivity indices were achieved by the Dutch holdings, and profitability – the Hungarian and Polish holdings. Very large Polish agricultural holdings also produced the highest aggregated values of the cumulative relative goodness index. Moreover, the paper points to the fundamental reasons behind the weakness of the Polish pig production sector, which cover low level of concentration and no linkages between the live pig producers and processing plants. It also determines how to take up and where to channel remedial actions.
Remarks on the parity determination of narrow resonances
Creators: name: Hanhart, C.
name: Haidenbauer, J.
name: Nakayama, K.
name: Meißner, U. -G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recently several proposals were put forward to determine the parity of narrow baryonic resonances, in particular the $Θ^+$. In these proceedings we will briefly comment on the general problems in this task and then discuss in detail the potential of reactions of the type $\vec N\vec N\toΘ^+Y$, where $Y$ denotes a hyperon (either $Σ$ or $Λ$) and the arrows indicate that a polarized initial state is required. Besides reiterating the model--independent properties of this class of reactions we discuss the physics content of some model calculations.
description: Invited talk presented at PENTAQUARK04 July 20-23, 2004 at SPring-8, Japan
Quenched fractions in the IllustrisTNG simulations: the roles of AGN feedback, environment, and pre-processing
Creators: name: Donnari, Martina
name: Pillepich, Annalisa
name: Joshi, Gandhali D.
name: Nelson, Dylan
name: Genel, Shy
name: Marinacci, Federico
name: Rodriguez-Gomez, Vicente
name: Pakmor, Ruediger
name: Torrey, Paul
name: Vogelsberger, Mark
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the IllustrisTNG simulations to show how the fractions of quenched galaxies vary across different environments and cosmic time, and to quantify the role AGN feedback and preprocessing play in quenching group and cluster satellites. At $z=0$, we select galaxies with $M_* = 10^{9-12} M_{\odot}$ residing within ($\leq R_{200c}$) groups and clusters of total host mass $M_{200c}=10^{13-15.2} M_{\odot}$. TNG predicts a quenched fraction of $\sim70-90\%$ (on average) for centrals and satellites $\gtrsim 10^{10.5} M_{\odot}$, regardless of host mass, cosmic time ($0\leq z\leq0.5$), clustercentric distance and time since infall in the $z=0$ host. Low-mass centrals ($\lesssim 10^{10} M_{\odot}$), instead, are rarely quenched unless they become members of groups ($10^{13-14} M_{\odot}$) or clusters ($\geq10^{14} M_{\odot}$), where the quenched fraction rises to $\sim80\%$. The fraction of low-mass passive galaxies is higher closer to the host center and for more massive hosts. The population of low-mass satellites accreted $\gtrsim$4-6 Gyr ago in massive hosts is almost entirely passive, thus suggesting an upper limit for the time needed for environmental quenching to occur. In fact, $\sim30\%$ of group and cluster satellites that are quenched at $z=0$ were already quenched before falling into their current host, and the bulk of them quenched as early as 4 to 10 billion years ago. For low-mass galaxies ($\lesssim10^{10-10.5}M_{\odot}$), this is due to preprocessing, whereby current satellites may have been members of other hosts, and hence have undergone environmental processes, before falling into their final host, this mechanism being more common and more effective for the purposes of quenching for satellites found today in more massive hosts. On the other hand, massive galaxies quench on their own and because of AGN feedback, regardless of whether they are centrals or satellites.
description: 21 Pages, 11 figures, 2 tables, 1 appendix, published in MNRAS
Enhanced Anomalous Hall Effect in Magnetic Topological Semimetal Co$_3$Sn$_{2-x}$In$_x$S$_2$
Creators: name: Zhou, Huibin
name: Chang, Guoqing
name: Wang, Guangqiang
name: Gui, Xin
name: Xu, Xitong
name: Yin, Jia-Xin
name: Guguchia, Zurab
name: Zhang, Songtian S.
name: Chang, Tay-Rong
name: Lin, Hsin
name: Xie, Weiwei
name: Hasan, M. Zahid
name: Jia, Shuang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the anomalous Hall Effect (AHE) of single-crystalline Co$_3$Sn$_{2-x}$In$_x$S$_2$ over a large range of indium concentration x from 0 to 1. Their magnetization reduces progressively with increasing x while their ground state evolves from a ferromagnetic Weyl semimetal into a nonmagnetic insulator. Remarkably, after systematically scaling the AHE, we find that their intrinsic anomalous Hall conductivity (AHC) features an unexpected maximum at around x = 0.15. The change of the intrinsic AHC corresponds with the doping evolution of Berry curvature and the maximum arises from the magnetic topological nodal-ring gap. Our experimental results show a larger AHC in a fundamental nodal-ring gap than that of Weyl nodes.
description: 6 pages, 4 figures + Supplementary Information