cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
In difesa del modello IS-LM
Creators: name: PATINKIN, D.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: IS-LM, Hicks
subject: E12

description: The author offers a defence of the IS-LM diagram, first developed by Hicks and recently criticised by some as a misleading analytical device. JEL Codes: E12
description: Moneta e Credito, V. 43, N. 170 (1990)
Windows on Quantum Gravity
Creators: name: Alvarez, Enrique
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: These are notes for a graduate course in quantum gravity planned at IFT-UAM/CSIC for the spring term of 2020, but delayed for an indefinite period of time (although a shortened version was given in the Escuela de Fisica (Institute of Physics) in the University of Costa Rica.). The aim of the course was to highlight the most important conceptual problems in the field and to summarize some of the most imaginative solutions to them that have been proposed in the literature. The course can best be characterized as idiosyncratic rather than encyclopedic.
description: 73 pages; 7 figures. Lectures on quantum gravity. Small changes; references added
Quantum Communication Through a Spin-Ring with Twisted Boundary Conditions
Creators: name: Bose, S.
name: Jin, B. -Q.
name: Korepin, V. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate quantum communication between the sites of a spin-ring with twisted boundary conditions. Such boundary conditions can be achieved by a flux through the ring. We find that a non-zero twist can improve communication through finite odd numbered rings and enable high fidelity multi-party quantum communication through spin rings (working near perfectly for rings of 5 and 7 spins). We show that in certain cases, the twist results in the complete blockage of quantum information flow to a certain site of the ring. This effect can be exploited to interface and entangle a flux qubit and a spin qubit without embedding the latter in a magnetic field.
description: four pages two figures
ALOCAÇÃO DE RECURSOS E ESCOLHA DE ATIVIDADES SOB CONDIÇÕES DE RISCO EM FAZENDAS COTONICULTORAS DO NORDESTE SEMI-ÁRIDO
Creators: name: Soares, Augusto César De M.
name: Meyer, Richard L.
name: Soares, Augusto César De M.
name: Meyer, Richard L.
Publisher: name: Unknown
Year: 1979
Subjects: Agribusiness

description: O presente trabalho pretende contribuir para uma melhor compreensão do compartimento dos produtores de algodão da região semi-árida do Nordeste Brasileiro que, através da adoção do sistema de parceria e de racional diversificação de atividades, conseguem minimizar variações no nível de renda, ao mesmo tempo que procura assegurar renda suficiente para cobrir a despesa familiar, assim como encargos referentes a despesas gerais da propriedade.
Temperature effects on dislocation core energies in silicon and germanium
Creators: name: Miranda, Caetano R.
name: Nunes, Ricardo W.
name: Antonelli, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Temperature effects on the energetics of the 90-degree partial dislocation in silicon and germanium are investigated, using non-equilibrium methods to estimate free energies, coupled with Monte Carlo simulations. Atomic interactions are described by Tersoff and EDIP interatomic potentials. Our results indicate that the vibrational entropy has the effect of increasing the difference in free energy between the two possible reconstructions of the 90-degree partial, namely, the single-period and the double-period geometries. This effect further increases the energetic stability of the double-period reconstruction at high temperatures. The results also indicate that anharmonic effects may play an important role in determining the structural properties of these defects in the high-temperature regime.
description: 8 pages in two-column physical-review format with six figures
Zmiany funkcjonalne a przekształcenia ziemi rolnej na cele pozarolnicze na obszarach rozdrobnionych agrarnie
Functional Changes and Conversion of Agricultural Land in the Area with Fragmented Agrarian Structure
Creators: name: Sawicka, Zofia
name: Fogel, Piotr
name: Sawicka, Zofia
name: Fogel, Piotr
Publisher: name: Unknown
Year: 2016
Subjects: subject: Community/Rural/Urban Development
subject: Land Economics/Use
subject: conversion of agricultural land
subject: multifunctional development
subject: local land-use plans
subject: sub-regional city
subject: Tarnow county

description: The following study aims at verifying whether and to which extent functional changes affect the conversion of agricultural land. The land under study features fragmented agrarian structure and the proximity of a subregional city with a population of more than 100 thousand. The paper describes legal conditions of agricultural land conversion (AL), analyses the risk of conversion and the functional and spatial changes of the area under study in 2004–2013. High population density and fragmented agrarian structure create strong pressure on AL conversion. The data illustrating changes in the income structure of agricultural holdings show that the area becomes multifunctional. A simultaneous analysis of utilized agricultural area supported by direct payment shows no relevant change in the share of AL. This leads to a conclusion that the functional transformation does not necessarily mean corresponding spatial changes. They may be based on a more intensive use of land which has already been urbanized. This way of thinking is absent among local land-use planners. In 2011–2013 the surface of non-agricultural land in local land-use plans has increased several times.
title: Pflasterbefestigungen in gebundener Bauweise
Creators: name: Yoncheva, Nevena
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Pflasterdecken
subject: Block pavements

description: Diese Diplomarbeit umfasst eine Literaturrecherche zur gebunden Pflasterbauweise. Zuerst werden die Grundlagen, die Einsatzmöglichkeiten für Pflasterbefestigungen, sowie die verschiedenen Pflasterbauweisen allgemein betrachtet. Weiters werden die Regelwerke für die ungebundene Bauweise der Länder Österreich, Deutschland und Schweiz untersucht. Anschließend wird ausführlich die gebundene Pflasterbauweise beschrieben. Es werden die Vor- und Nachteile dieser Methode dargelegt, sowie die Dimensionierung und die Baustoffe erklärt. Weiters werden noch die Herstellungsgrundsätze verschiedener Schichten und einige Besonderheiten bei der Ausführung einer solchen Verkehrsfläche wie z.B. Bewegungsfugen dargestellt. In diesem Zusammenhang werden Empfehlungen für die Anordnung von Bewegungsfugen und die Auswirkungen, wenn diese nicht vorhanden sind, beschrieben. Im Rahmen dieser Arbeit wird abschließend eine Analyse der aktuell vorhandenen Mörtelprodukte auf dem österreichischen Baumarkt durchgeführt. Es werden die technischen Kennwerte und die Verarbeitungshinweise dieser Mörtelprodukte von verschieden Herstel-lern gegenüber gestellt.
description: This thesis includes a literature review of bounded block pavement constructions. First, the basics and the possibilities of block pavement placement, as well as the various types of constructions are considered. Furthermore, the regulations in different countries Austria, Germany and Switzerland are examined. The bound block pavement design needs a specific approach. Further, the bound block pavement construction is described in detail. There are given the advantages and disadvantages of this method, as well as the pavement design and the used materials. Described are the production principles of different layers and some peculiarities in the execution of the road construction such as expansion joints. In this context, the requirements for this expansion joints are described. In this work it will be given an analysis of the currently existing mortar types for pavement constructions on the Austrian market. The technical characteristics and the instructions of these products from different manufactures will be described and compared.
Wielomianowa analiza logitowa w badaniach aktywności ekonomicznej ludności wiejskiej
The Use of Multinomial Logistic Regression in the Analysis of Rural Population’s Economic Activity
Creators: name: Kołodziejczak, Włodzimierz
name: Wysocki, Feliks
name: Kołodziejczak, Włodzimierz
name: Wysocki, Feliks
Publisher: name: Unknown
Year: 2016
Subjects: subject: Labor and Human Capital
subject: Research Methods/ Statistical Methods
subject: multinomial logistic regression
subject: economic activity of population
subject: labour market
subject: flows on the labour market
subject: rural population

description: Multinomial logistic regression can be used to analyse economic activity of population and labour market. Its application enables to decompose labour resources according to selected demographic and socio-economic traits in relation to the degree of change in the state of economic population activity. The aim of the paper is to present the possibilities of using the logit models to assess the chances (risks) and probabilities of changes in the state of economic population activity depending on its selected socio-demographic traits. The flows from employment to unemployment, and to economic inactivity were discussed. The research method and the data were described. An interpretation of selected research results was also presented. Due to the need to follow changes of the state of economic population activity over time, individual raw data from the Labour Force Survey are relevant to build multinomial logit models of the labour market. The possibility of decomposition is limited by the size of the sample, which results from the structure of population under Labour Force Survey and from the length of the analysed period. In practice, a satisfactory model alignment requires a consideration of an analysis period which is at least several years long (and combining the data into a coherent base) along with an aggregation of certain population groups (e.g. all non-agricultural sections of PKD or contiguous age classes). Moreover, correct inference also requires knowledge and experience of a researcher and it should take account of a broad socio-economic context, i.e. quality conditions of the reference system.
A stacking-fault based microscopic model for platelets in diamond
Creators: name: Miranda, C. R.
name: Nunes, R. W.
name: Antonelli, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a new microscopic model for the $\{001\}$ planar defects in diamond commonly called platelets. This model is based on the formation of a metastable stacking fault, which can occur because of the ability of carbon to stabilize in different bonding configurations. In our model the core of the planar defect is basically a double layer of three-fold coordinated $sp^2$ carbon atoms embedded in the common $sp^3$ diamond structure. The properties of the model were determined using {\it ab initio} total energy calculations. All significant experimental signatures attributed to the platelets, namely, the lattice displacement along the $[001]$ direction, the asymmetry between the $[110]$ and the $[1\bar{1}0]$ directions, the infrared absorption peak $B^\prime$, and broad luminescence lines that indicate the introduction of levels in the band gap, are naturally accounted for in our model. The model is also very appealing from the point of view of kinetics, since naturally occurring shearing processes will lead to the formation of the metastable fault.
description: 5 pages, 4 figures. Submitted for publication on August 2nd, 2004
Landau quantization effects in the charge-density-wave system (Per)$_2M$(mnt)$_2$ (where $M=$Au and Pt)
Creators: name: McDonald, R. D.
name: Harrison, N.
name: Singleton, J.
name: Bangura, A.
name: Goddard, P. A.
name: Ramirez, A. P.
name: Chi, X.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A finite transfer integral $t_a$ orthogonal to the conducting chains of a highly one-dimensional metal gives rise to empty and filled bands that simulate an indirect-gap semiconductor upon formation of a commensurate charge-density-wave (CDW). In contrast to semiconductors such as Ge and Si with bandgaps $\sim 1$ eV, the CDW system possesses an indirect gap with a greatly reduced energy scale, enabling moderate laboratory magnetic fields to have a major effect. The consequent variation of the thermodynamic gap with magnetic field due to Zeeman splitting and Landau quantization enables the electronic bandstructure parameters (transfer integrals, Fermi velocity) to be determined accurately. These parameters reveal the orbital quantization limit to be reached at $\sim 20$ T in (Per)$_2M$(mnt)$_2$ salts, making them highly unlikely candidates for a recently-proposed cascade of field-induced charge-density wave states.
Small-Scale Dynamo in Stably Stratified Turbulence
Creators: name: Skoutnev, Valentin
name: Squire, Jonathan
name: Bhattacharjee, Amitava
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present numerical investigations into three principal properties of the small-scale dynamo in stably stratified turbulence: the onset criterion, the growth rate, and the nature of the magnetic field anisotropy in the kinematic regime. The results suggest that all three dynamo properties are controlled by the scale separation between the Ozmidov scale and the viscous or resistive scale. In addition to the critical magnetic Reynolds number, this allows for the definition of critical buoyancy and magnetic buoyancy Reynolds numbers for stratified small-scale dynamo onset in the high and low magnetic Prandtl number regimes, respectively. The presence of a small-scale dynamo in stellar radiative zones could affect dynamics through resulting Maxwell stresses and/or influence large-scale dynamo mechanisms in regions of differential rotation. Taking the solar radiative zone as a representative example and applying the onset criterion, we find that the stratification is strong enough to make the small-scale dynamo marginally active in the stably stratified turbulence of the solar tachocline.
Relacje wynagrodzenia i wydajności czynnika pracy w rolnictwie na tle gospodarki narodowej i jej sektorów w Polsce w okresie 2005-2012
Relationship between Labour Productivity and Its Remuneration in Agriculture in Comparison with National Economy and Its Sectors in Poland in the Period 2005-2012
Creators: name: Rembisz, Włodzimierz
name: Rembisz, Włodzimierz
Publisher: name: Unknown
Year: 2016
Subjects: subject: Labor and Human Capital
subject: Productivity Analysis
subject: relations between labour productivity and its remuneration
subject: unit labour cost

description: The Author discusses the relationship between the productivity of the labour factor and its remuneration. The analysis is focused on a comparison of agriculture to the national economy and its selected sectors. Both static and dynamic approaches are applied. The relationship between the productivity of the labour factor and its remuneration gives information whether the remuneration results from the productivity. Producer’s equilibrium, zero profit conditions and the problem of the allocation and distribution in the sectoral perspective are the theoretical basis for such an analysis. It is demonstrated whether (and to what extent) labour productivity is the source of funding remuneration in a given sector. Secondly, the analysis allows to assess rationality of the allocation of the labour factor and distribution of value added among sectors. The results can indicate i.a. whether agriculture benefits or loses from such a distribution. The analysis consists of two parts. In the first step the Author derives analytical formulas similar to the idea of the unit labour costs and presents theoretical proof. In the second step, empirical study is conducted based mainly on the graphical illustration.
MPEC 2024-T308 : 2024 TM20
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TM20

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Recoil and Power Corrections in High-x_T Direct-Photon Production
Creators: name: Sterman, George
name: Vogelsang, Werner
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a class of nonperturbative corrections to single-inclusive photon cross sections at measured transverse momentum p_T, in the large-x_T limit. We develop an extension of the joint (threshold and transverse momentum) resummation formalism, appropriate for large x_T, in which there are no kinematic singularities associated with recoil, and for which matching to fixed order and to threshold resummation at next-to-leading logarithm (NLL) is straightforward. Beyond NLL, we find contributions that can be attributed to recoil from initial state radiation. Associated power corrections occur as inverse powers of p_T^2 and are identified from the infrared structure of integrals over the running coupling. They have significant energy dependence and decrease from typical fixed-target to collider energies. Energy conservation, which is incorporated into joint resummation, moderates the effects of perturbative recoil and power corrections for large x_T.
description: 22 pages, 4 figures as epsi, one reference added
Detection of CO from SMM J16359+6612, The Multiply Imaged Submillimeter Galaxy Behind A2218
Creators: name: Sheth, Kartik
name: Blain, Andrew W.
name: Kneib, Jean-Paul
name: Frayer, David T.
name: van der Werf, P. P.
name: Knudsen, K. K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of CO ($J$=3$\to$2) line emission from all three multiple images (A,B and C) of the intrinsically faint ($\simeq$ 0.8 mJy) submillimeter-selected galaxy SMM J16359+6612. The brightest source of the submm continuum emission (B) also corresponds to the brightest CO emission, which is centered at $z$=2.5168, consistent with the pre-existing redshift derived from \Ha. The observed CO flux in the A, B and C images is 1.2, 3.5 and 1.6 Jy \kms respectively, with a linewidth of $500\pm 100$ \kms. After correcting for the lensing amplification, the CO flux corresponds to a molecular gas mass of $\sim 2\times 10 ^{10} h_{71}^{-2}$ \Msun, while the extent of the CO emission indicates that the dynamical mass of the system $\sim9\times10^{10}$ \Msun. Two velocity components are seen in the CO spectra; these could arise from either a rotating compact ring or disk of gas, or merging substructure. The star formation rate in this galaxy was previously derived to be $\sim$100--500 \Msun \yr. If all the CO emission arises from the inner few kpc of the galaxy and the galactic CO-to-H$_2$ conversion factor holds, then the gas consumption timescale is a relatively short 40 Myr, and so the submm emission from SMM J16359+6612 may be produced by a powerful, but short-lived circumnuclear starburst event in an otherwise normal and representative high-redshift galaxy.
description: Appearing in the 2004 October 10 issue of the Astrophysical Journal Letters, Volume 614, L5-L8
title: Pantograph modeling for control
Creators: name: Maier, Clemens Carl
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Nichtlineare Modellierung
subject: Pantograph
subject: Echtzeitfähigkeit
subject: Nonlinear modeling
subject: pantograph
subject: real-time capability

description: Die Diplomarbeit Pantograph Modeling for Control stellt zwei unterschiedliche echtzeitfähige Pantographenmodelle vor, welche hinsichtlich einer Anwendung in einer Pantographen-Oberleitungs-Co-Simulation einerseits, und für den Pantographen Reglerentwurf andererseits entwickelt wurden. Diese Modelle wurden durch eine Modell-auf-Modell Identifikation bestimmt, wobei ein existierendes White Box Modell des Pantographen aus \cite
description: The thesis Pantograph Modeling for Control presents two different real-time capable pantograph models, intended for an application in pantograph-catenary co-simulations and pantograph control design. These models were derived from model-on-model identification referencing an existing nonlinear white-box pantograph model from \cite
Due tipi di politica monetaria
Creators: name: DOW, J.C.R.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Monetary policy, Demand management approach, Monetary targets approach
subject: E52

description: The article traces the origin, development and effectiveness of two types of monetary policy. These are the 'demand management' approach, which uses monetary instruments as a means of maintaining policy, and the 'monetary targets' approach. The United Kingdom has moved from favouring the latter approach to the former, and the reasons behind this change of attitude are discussed. In addition the experiences of Italian governments and monetary policies are outlined. JEL Codes: E52
description: Moneta e Credito, V. 43, N. 171 (1990)
Wybrane problemy fiskalne rozwoju wsi. Wprowadzenie do problemu
Selected Fiscal Problems of Rural Development. An Introduction
Creators: name: Kulawik, Jacek
name: Kulawik, Jacek
Publisher: name: Unknown
Year: 2016
Subjects: subject: Agricultural Finance
subject: Financial Economics
subject: fiscal decentralization
subject: fiscal federalism
subject: environmental federalism
subject: inter-jurisdictional competition and cooperation
subject: the Tiebout model
subject: Buchanan’s theory of club goods

description: Rural development is understood as a socio-economic process that consists of desired and positive qualitative and quantitative changes, leading to increased efficiency and productivity of rural businesses and the usefulness of rural households. This is in many ways determined by and at the same time embedded in the socio-economic development beyond local and regional level, and, consequently, also in general economic development. However, financial variables, including fiscal ones, quite rarely determine rural development. Therefore, the main objective of the article is to reduce this cognitive gap, which is of great importance also for regional and agri-food policy. The analysis is centered around the theory and practical achievements of fiscal federalism, which is a sub-discipline of public finances. According to this, the Author starts with presenting general assumptions of fiscal and environmental federalism. Then, focus is shifted to controversies related to fiscal decentralization in order to move on inter-jurisdictional competition and cooperation. In the background of this part of the analysis there is the Tiebout model, which is one of the most interesting conceptualizations of local and regional development mechanism. In the final part of the article the Author presents the key elements of Buchanan’s theory of club goods as a tool for optimizing the size of the local units.
Przyczyny i przejawy peryferyjności obszarów wiejskich w Polsce
Causes and Symptoms of Peripherality of Rural Areas in Poland
Creators: name: Nurzyńska, Iwona
name: Nurzyńska, Iwona
Publisher: name: Unknown
Year: 2016
Subjects: subject: Community/Rural/Urban Development
subject: rural areas
subject: economic peripherality
subject: social and territorial cohesion

description: Spatial disparities of social and economic development results in emerging of marginalized (peripheral) areas. Rural areas are particularly exposed to this phenomenon. Peripherality is a multidimensional and complex concept. It is of relative nature and iden tification and determination of peripheral areas is subjective and depends on the identification criteria applied. Peripherality is commonly recognized as a negative phenomenon with such underlying features as backwardness, dependency, marginalization and deprivation. Governments at central and regional levels undertake various actions and public interventions in order to achieve social and territorial cohesion. However, the results of those undertakings are far from satisfactory. The goal of this article is to analyze dimensions of the peripherality of rural areas, especially its economic dimension, and to indicate causes of peripheriality in view of theories and concepts of regional development. This paper is based on the analysis of the literature, public statistics and own research results.
Leptogenesis from the Asymmetric Texture
Creators: name: Rahat, Moinul Hossain
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate non-resonant thermal leptogenesis in the context of the $SU(5) \times \mathcal{T}_{13}$ "asymmetric texture", where both Dirac and Majorana ${CP}$ violation arise from a single phase in the tribimaximal seesaw mixing matrix. We show that the baryon asymmetry of the universe can be explained in this model only when flavor effects are considered for right-handed neutrino masses of $\mathcal{O}(10^9 - 10^{12})$ $\text{GeV}$. The sign of the baryon asymmetry also determines the sign of the previously predicted Dirac $\require{cancel}\cancel{CP}$ phase $|δ_{CP}| = 1.32π$, consistent with the latest global fit $δ_{CP}^{PDG} = 1.37 \pm 0.17π$.
description: 31 pages, 6 figures, major revision from previous version, includes new analysis and results, matches accepted version in Phys. Rev. D
LA PRODUCCION AG RICO LA DIE PUERTO RICO Y Sil I ΝΤΕ RACOON CON EL CARIIJE Y LOS ESTADOS UNIDOS DE 1954-55 A 1994-95
Creators: name: Alamo, C. I.
name: Almodovar, K.
name: Dow, J. Kamal
name: Alamo, C. I.
name: Almodovar, K.
name: Dow, J. Kamal
Publisher: name: Unknown
Year: 1997
Subjects: International Relations/Trade
Production Economics

description: This study evaluates the trends of agricultural production of Puerto Rico from 1954-55 until 1994-1995. It analyzes the (rends of local production and its relation with events, agreements and regulations that ocurretl during this period in Puerto Rico, the Caribbean and the United Stales. Crops in which there has been free commerce with the Caribbean, Central America and the U.S. will be discussed. Under this category arc located most of the agriculture enterprises. The pattern of production of crops protected by local regulations will also be analyzed. Wc will evaluate the efTccls of the closing of the Cuban economy and traditional Puerton ican crops. Using as a base the information gathered and analyzed in light of global initiatives, recommendations will be made on areas with potential for the development of agriculture production of Puerto Rico.
Generalized Dedekind sums
Creators: name: Long, D. D.
name: Reid, A. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 11F20, 20H10

description: Classical Dedekind sums are connected to the modular group through the construction of a (Dedekind) symbol on the cusp set of the modular group. In this paper we study generalizations of Dedekind symbols and sums that can be associated to certain Fuchsian groups uniformizing 1-punctured tori.
description: Published by Geometry and Topology Monographs at http://www.maths.warwick.ac.uk/gt/GTMon7/paper8.abs.html
COMPOSITION AND RECENT EVOLUTION OF THE EXTERNAL TRADE IN AGRICULTURAL AND FOOD PRODUCTS OF PUERTO RICO
Creators: name: Dow, J. Kamal
name: Dow, J. Kamal
Publisher: name: Unknown
Year: 1997
Subjects: International Relations/Trade

description: EI comercio exterior, muy importante para la economia de Puerto Rico, ha evolucionado de una situacion deficitaria permanente a una situacion de superavit en la Balanza de Pagos en la ultima decada. Como es natural el comercio esta dominado por los Estados Unidos a donde van el 85% de las exportaciones y se originan el 90% de las importaciones. EI 50% de las exportaciones y el 40% de las importaciones al resto del mundo van y se originan en America Latina y el Caribe. La implementacion de un esquema de libre comercio para el Hemisferio Occidental tendria importantes efectos en el comercio exterior de la isla. En cuanto al comercio exterior de productos agropecuarios y alimenticios, la situacion es muy diferente pues Puerto Rico exhibe un deficit permanente tanto en productos de origen vegetal y animal como en productos frescos del mar. Este deficit es parcialmente compensado por las exportaciones de productos de mar elaborados, aunque la ventaja competitiva en esta area parece estarse deteriorando. Durante la ultima decada se han operado cambios significativos en los productos comerciados y en el origen y destino de este comercio.
Guadagni in conto capitale, fondi pensionistici e il basso saggio di risparmio negli Stati Uniti
Creators: name: STEINDL, J.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Savings, United States, Consumerism
subject: E21

description: The United States has always been regarded as a consumer-oriented society. Statistics compiled for the 1980s demonstrate that the United States has a very low savings ratio. Two major factors are identified as causing this, the federal and state tax treatment of loan interest and the high volume of consumer credit. There are dangers associated with this short-term perspective of instant consumerism, and institutions dealing in long-term financial management (pension/insurance companies) have particular problems in this respect. JEL Codes: E21
description: Moneta e Credito, V. 43, N. 171 (1990)
Le economie dell'Europa orientale: aggiustamento forzato per sempre?
Creators: name: WINIECKI, J.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: East European economies, Central planning
subject: P11

description: This article was written before the impact of recent political and economic changes was fully realised, however, it highlights problems that were simmering before the changes and which must now be tackled head-on. Many years of under-investment and central planning have left inherent problems for many economies. In addition, many of the newly liberated countries have vast external debts which now have to be serviced. The article examines many of these problems in detail and suggests policies that could be adopted. JEL Codes: P11
description: Moneta e Credito, V. 43, N. 171 (1990)
Mercantilismo moderno, fallimento delle banche centrali e dilemma di politica economica: il caso di Taiwan
Creators: name: FAN, L.S.
name: FAN, C.M.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Taiwan, Monetary policy, Central bank
subject: E52

description: A case study of Taiwan’s economic growth and monetary policy. JEL Codes: E52
description: Moneta e Credito, V. 43, N. 171 (1990)
EDUCACJON COOPERATIVA EN AGRICULTURA: ES LA BON CON EL MUNDO REAL
Creators: name: Gonzalez, G. M.
name: Gonzalez, G. M.
Publisher: name: Unknown
Year: 1997
Subjects: Teaching/Communication/Extension/Profession

description: Las instituciones educativas se cnfrentan al rcto de preparer estudiantes para un mercado de empleo cada vez mâs compctitivo en una economia globalizada. Los estudiantes de ciencias agricolas necesitan ser pro-activos para atender los problemas que les presenta el mundo real. En esta sesiôn se describirâ como el Colegio de Ciencias Agricolas del Recinto Universitario de Mayagiiez de la Universidad de Puerto Rico intenta lograr los objetivos. El programa cooperativo de education, a través del aprendizaje en el empleo en agencias publicas y agroempresas, de reciente implantation en la Facultad de Agricultura, esta disponible a los estudiantes de todos los departamentos y programas académicos. Se discutirân los beneficios que recibe el estudiante, la institution educativa, incluyendo los docentes, y la organizaciôn cooperadora. Se darâ una description general del programa, incluyendo los requisîtos de admisiôn, el proceso de selection de empleo internado, condiciones de empleo, funciôn del supervisor, responsabilidades del estudiante y el proceso de visitas y evaluation.
Timing of the accreting millisecond pulsar IGR J17591-2342: evidence of spin-down during accretion
Creators: name: Sanna, A.
name: Burderi, L.
name: Gendreau, K. C.
name: Di Salvo, T.
name: Ray, P. S.
name: Riggio, A.
name: Gambino, A. F.
name: Iaria, R.
name: Piga, L.
name: Malacaria, C.
name: Jaisawal, G. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the phase-coherent timing analysis of the accreting millisecond X-ray pulsar IGR J17591-2342, using Neutron Star Interior Composition Explorer (NICER) data taken during the outburst of the source between 2018 August 15 and 2018 October 17. We obtain an updated orbital solution of the binary system. We investigate the evolution of the neutron star spin frequency during the outburst, reporting a refined estimate of the spin frequency and the first estimate of the spin frequency derivative ($\dotν \sim -7\times 10^{-14}$ Hz s$^{-1}$), confirmed independently from the modelling of the fundamental frequency and its first harmonic. We further investigate the evolution of the X-ray pulse phases adopting a physical model that accounts for the accretion material torque as well as the magnetic threading of the accretion disc in regions where the Keplerian velocity is slower than the magnetosphere velocity. From this analysis we estimate the neutron star magnetic field $B_{eq} = 2.8(3)\times10^{8}$ G. Finally, we investigate the pulse profile dependence on energy finding that the observed behaviour of the pulse fractional amplitude and lags as a function of energy are compatible with a thermal Comptonisation of the soft photons emitted from the neutron star caps.
description: Submitted to MNRAS. 10 pages, 6 figures, 2 tables
OPINIONS OF AGRICULTURAL EXTENSION AGENTS IN PUERTO RICO REGARDING SUSTAINABLE AGRICULTURE
Creators: name: Huerta, J. M.
name: Huerta, J. M.
Publisher: name: Unknown
Year: 1997
Subjects: Farm Management
Teaching/Communication/Extension/Profession

description: The College of Agriculture in Puerto Rico is taking the initiative of implementing a training project on sustainable agriculture for both agronomists and farmers under the concept of training the trainers. The goal of the program is to foster the adoption of sustainable agriculture practices among the farmers in the mountanous region of Puerto Rico. The objectives of the program are to: (1) promote the use of sustainable farming practices among the farmers. (2) foster confidence in the economic viability of sustainable agricultural practices among the farmers and, (3) encourage sustainable agriculture practices among the farmers as an alternative to protect the environment. The concerns of the agronomists for the training will be included based on Huerta, 1996. A study on in-service training on sustainable agriculture in Puerto Rico will be utilized in designing the project. A series of Focus Groups will be developed prior to the training with group of farmers representative from the target population. The purpose of the Focus Group will be to establish the needs and concerns of farmers in respect to sustainable agriculture, and to access their preferred source of information on the subject-matter area.
Effects of lateral diffusion on morphology and dynamics of a microscopic lattice-gas model of pulsed electrodeposition
Creators: name: Frank, Stefan
name: Roberts, Daniel E.
name: Rikvold, Per Arne
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The influence of nearest-neighbor diffusion on the decay of a metastable low-coverage phase (monolayer adsorption) in a square lattice-gas model of electrochemical metal deposition is investigated by kinetic Monte Carlo simulations. The phase-transformation dynamics are compared to the well-established Kolmogorov-Johnson-Mehl-Avrami theory. The phase transformation is accelerated by diffusion, but remains in accord with the theory for continuous nucleation up to moderate diffusion rates. At very high diffusion rates the phase-transformation kinetic shows a crossover to instantaneous nucleation. Then, the probability of medium-sized clusters is reduced in favor of large clusters. Upon reversal of the supersaturation, the adsorbate desorbs, but large clusters still tend to grow during the initial stages of desorption. Calculation of the free energy of subcritical clusters by enumeration of lattice animals yields a quasi-equilibrium distribution which is in reasonable agreement with the simulation results. This is an improvement relative to classical droplet theory, which fails to describe the distributions, since the macroscopic surface tension is a bad approximation for small clusters.
description: Minor corrections and modifications. 15 pages with 10 figures. Accepted for publication in the Journal of Chemical Physics, see http://jcp.aip.org/jcp/
Long-term effects of nitrogen and phosphorus fertilization on ectomycorrhizal diversity of 18-year-old western hemlock (Tsuga heterophylla) on northern Vancouver Island
Creators: name: Wright, Shannon Heather Ann
Publisher: name: University of British Columbia
Year: 2011

description: This thesis explores the diversity of ectomycorrhizae of western hemlock (Tsuga heterophylla) in nutrient-poor environments and the role of fertilization on the ectomycorrhizal fungal community. In Chapter One, the thesis provides an introduction to mycorrhizal fungi and to my research site, a cedar-hemlock ecosystem on northern Vancouver Island where forest regeneration has been problematic. The first chapter continues with a review of previous studies of mycorrhizae from the same research site and of western hemlock. Chapter Two presents the results of my study on the effects of nitrogen and phosphorus fertilization on ectomycorrhizal species composition and diversity. Nitrogen fertilization typically reduces ectomycorrhizal diversity within the first two years of its application. Less is known about the long-term influence of fertilization. In this research, ectomycorrhizal diversity and community composition were compared among three fertilization treatments in plots of 18-year old western hemlock from northern Vancouver Island, Canada. Of nine plots, three were unfertilized controls. Six plots were fertilized in 1987 and 1997; three with 300 kg/ha urea (N); and three with the kg/ha N plus 100 kg/ha P (N + P). Four sets of 100 ectomycorrhizal root tips were sampled per plot and used for random clone libraries of amplified ITS regions using fungal specific primers ITSIF and TW13. Fungal species were identified from sequenced clones using fast parsimony analysis. Assuming that clones with > 97% identity were conspecific, 99 species were detected among 1004 clones sequenced. Fungal diversity was high and not significantly different across treatments. Species composition differed significantly in N + P plots compared to control plots or plots that received N alone. The presence of Cenococcum geophilum spl0 and Dermocybe cinnamomea were correlated with control and N plots, whereas the presence of Cenococcum geophilum sp8 and sp9, and Cortinarius spl8 and spl9 were correlated with N + P plots. Chapter Three of this thesis discusses limitations of a molecular approach to detecting fungal diversity, and ideas for future research to help elucidate the ecological roles of ectomycorrhizal fungi. This thesis contributes new knowledge about the diversity of western hemlock's ectomycorrhizal fungi and shows that N + P fertilization used in forest management has resulted in a long-lasting change in the ectomycorrhizal fungal community composition.
L'evoluzione dell'economia italiana 1960-1965. Un'analisi strutturale
Creators: name: RAMPA, G.
name: RAMPA, L.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Italy, energy, technology
subject: N34

description: The article outlines the salient features of the structural evolution of the Italian economy in recent decades, using the information deduced from the input-output tables. First,a brief summary of the evolution of the uses of intermediate inputs in the period 1960-1985 is provided. Some possible interpretations of this evolution are then offered, comparing them with those contained in previous works. The authors then evaluate the evolution of energy technology in greater detail. The effects of changes in intermediate technology, as well as in relative prices, on the distribution of value added are considered. The trends in the coefficients of services inputs are then considered explicitly, linking them to the recent debate on outsourcing. Finally the authors show how the structure of Italian sectoral interdependence, together with that of CEE countries, has contributed to increasing foreign dependence. JEL Codes: N34
description: Moneta e Credito, V. 43, N. 171 (1990)
MPEC 2024-T309 : 2024 TN20
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TN20

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Numerische WKB-Methode für die stationäre Schrödingergleichung : Spektralmethode zur Phasenberechnung
Creators: name: Ujvari, Bernhard
Publisher: name: TU Wien
Year: 2015
Subjects: subject: hochoszillatorische Gleichungen
subject: Spektralmethoden
subject: highly oscillatory equations
subject: spectral methods

description: Die Arbeit behandelt ein numerisches WKB-Verfahren zur Näherung der hoch oszillatorischen Lösung einer stationären Schrödingergleichung. In der WKB-Näherung tritt ein Integral auf, das mit Hilfe von Spektralmethoden numerisch berechnet werden soll. Dabei wird untersucht, wie sich die Verwendung von Spektralmethoden, in der Arbeit die Clenshaw-Curtis Quadratur und eine baryzentrisch interpolierte Stammfunktion nach Entwicklung in eine Chebyshevreihe, auf den Gesamtfehler des Verfahrens im Vergleich zu gängigen Quadraturverfahren (wie Simpsonquadratur oder Trapezregel) auswirkt. Dazu wird in Kapitel 3 die Fehlerabschätzung des WKB-Verfahrens um eine Abschätzung des Fehlers erweitert, der bei der numerischen Berechnung des auftretenden Phasenintegrals entsteht. In Kapitel 4 und 5 wird das WKB-Verfahren und die Integration mit Spektralmethoden anhand von zwei numerischen Beispielen behandelt.
description: The work discusses a numerical WKB-method use for the approximation of a high oscillating solution of a stationary Schr-odinger equation. An integral occurs WKB approximation that should be computed by means of spectral methods. Thereby, it will be investigated how the use of spectral methods, in this work the Clenshaw-Curtis quadrature and barycentric interpolated antiderivative after expansion in a chebyshev series, effects the global error of the WKB-Method in comparison with other quadrature methods (such as the simpson quadrature or trapezoidal rule). Therefore, in chapter 3, the error estimation of the WKB-method will be extended by one estimation of the error, that arises during the numerical calculation of the occurring phase integral. Furthermore, in the chapters 4 and 5, the WKB-method and the integration, with, former mentioned, spectral methods will be discussed based on two numerical examples.
Alkali and Halogen Chemistry in Volcanic Gases on Io
Creators: name: Schaefer, Laura
name: Fegley, Bruce
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use chemical equilibrium calculations to model the speciation of alkalis and halogens in volcanic gases emitted on Io. The calculations cover wide temperature (500-2000 K) and pressure (10^-6 to 10^+1 bars) ranges, which overlap the nominal conditions at Pele (T = 1760 K, P = 0.01 bars). About 230 compounds of 11 elements (O, S, Li, Na, K, Rb, Cs, F, Cl, Br, I) are considered. We predict the major alkali and halogen species in a Pele-like volcanic gas and the major alklai and halogen condensates. We also model disequilibrium chemistry of the alkalis and halogens in the volcanic plume. Based on this work and our prior modeling for Na, K, and Cl in a volcanic plume, we predict the major loss processes for the alkali halide gases are photolysis and/or condensation onto grains. On the basis of elemental abundances and photochemical lifetimes, we recommend searching for gaseous KCl, NaF, LiF, LiCl, RbF, RbCl, CsF, and CsCl around volcanic vents during eruptions. Based on abundance considerations and observations of brown dwarfs, we also recommend a search of Io's extended atmosphere and the Io plasma torus for neutral and ionized Li, Cs, Rb, and F.
description: 32 pages, 4 tables, 5 figures; accepted for publication by Icarus
Approximal operator with application to audio inpainting
Creators: name: Mokrý, Ondřej
name: Rajmic, Pavel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In their recent evaluation of time-frequency representations and structured sparsity approaches to audio inpainting, Lieb and Stark (2018) have used a particular mapping as a proximal operator. This operator serves as the fundamental part of an iterative numerical solver. However, their mapping is improperly justified. The present article proves that their mapping is indeed a proximal operator, and also derives its proper counterpart. Furthermore, it is rationalized that Lieb and Stark's operator can be understood as an approximation of the proper mapping. Surprisingly, in most cases, such an approximation (referred to as the approximal operator) is shown to provide even better numerical results in audio inpainting compared to its proper counterpart, while being computationally much more effective.
Modeling the evolution of drinking behavior: A Statistical Physics perspective
Creators: name: Crokidakis, Nuno
name: Sigaud, Lucas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this work we study a simple compartmental model for drinking behavior evolution. The population is divided in 3 compartments regarding their alcohol consumption, namely Susceptible individuals $S$ (nonconsumers), Moderate drinkers $M$ and Risk drinkers $R$. The transitions among those states are ruled by probabilities. Despite the simplicity of the model, we observed the occurrence of two distinct nonequilibrium phase transitions to absorbing states. One of these states is composed only by Susceptible individuals $S$, with no drinkers ($M=R=0$). On the other hand, the other absorbing state is composed only by Risk drinkers $R$ ($S=M=0$). Between these two steady states, we have the coexistence of the three subpopulations $S$, $M$ and $R$. Comparison with abusive alcohol consumption data for Brazil shows a good agreement between the model's results and the database.
description: 20 pages, 4 figures, to appear in Physica A