cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Index Theorem and Universality Properties of the Low-lying Eigenvalues of Improved Staggered Quarks
Creators: name: Follana, E.
name: Hart, A.
name: Davies, C. T. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study various improved staggered quark Dirac operators on quenched gluon backgrounds in lattice QCD generated using a Symanzik-improved gluon action. We find a clear separation of the spectrum into would-be zero modes and others. The number of would-be zero modes depends on the topological charge as expected from the Index Theorem, and their chirality expectation value is large (approximately 0.7). The remaining modes have low chirality and show clear signs of clustering into quartets and approaching the random matrix theory predictions for all topological charge sectors. We conclude that improvement of the fermionic and gauge actions moves the staggered quarks closer to the continuum limit where they respond correctly to QCD topology.
description: 4 pages, 3 figures
Leituras
Creators: name: Ramos, Pedro
name: Proença, Maria Carla
Publisher: name: Cadernos BAD
Year: 2007

description: PATRÍCIO, Helena Margarida Mendes Ferrão Simões – Análise comparativa da aplicação do modelo relacional e do formalisno RDF à modelação de dados legislativos. Lisboa: Vice-Presidência dos Mestrados do Departamento de Ciências e Tecnologias da Informação do ISCTE, 2007. 170 p. ISBN 978-972-97251-2-8 SANTOS, Maria Luísa F. N. dos – Organização do conhecimento e representação de assuntos: caminhos para uma efectiva recuperação da informação em ambientes de redes. Lisboa: Biblioteca Nacional de Portugal, 2007. 180 p. ISBN 978-972-565-412-5.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
INGLIS TILINDEGI SÓZLERDI QARAQALPAQ TILINE AWDARMALAǴANDA KONTEKSTTIŃ TÁSIRI
Creators: name: Usaxov, Rustem
Publisher: name: Zenodo
Year: 2024

description: Sózlerdi bir tilden ekinshi tilge awdarmalawda, ásirese, inglis tilindegi sózlerdi qaraqalpaq tiline awdarmalawda sózlerdiń qaysı kontekstte qollanıwına itibar qaratıw kerek. Kontekst sóz hám awdarmanıń anıq mánisin anıqlawda tiykarǵı rol oynaydı. Inglis tilindegi birdey sóz bir neshe qıylı mániske iye bolıwı múmkin hám qaraqalpaq tiline awdarma etilgende tiyisli awdarmanı tańlaw kontekstke baylanıslı bolıwı múmkin. Bul maqalada inglis tilindegi sózlerdiń qaraqalpaq tiline awdarmasına konteksttiń tásiri kórip shıǵıladı hám kontekst sózdiń awdarması hám anıq mánisin qanday ózgertiwi múmkinligin kórsetiw ushın mısallar keltiriledi.
Sustainability During the Pandemic : Expectations of the Self and Others
Creators: name: Lam, Benjamin
name: Chiu, Kevin
name: Le, Mark
name: Tai, Fira
name: Sun, Patrick
Publisher: name: The University of British Columbia
Year: 2021

description: Past studies have examined the crucial role that self-serving bias plays during the COVID-19 pandemic – highlighting the issues of environmental insecurity and sustainable habits. During the pandemic, people were advised to alter their behaviors in order to reduce the transmission rates of the virus. We are interested to examine the extent to which our individual expectations differed from the expectations we have for others’ sustainable behaviours during the COVID-19 pandemic. We conducted a between subjects design at The University of British Columbia (UBC), and asked 128 UBC students to fill out a self-report survey, where we obtained 119 valid responses. Participants were randomly assigned to four conditions. The first and second conditions asked participants to use a 7-point Likert scale to rate their acceptability of specific unsustainable behaviors during COVID-19 and no-COVID-19 respectively. The third and fourth conditions were designed very similarly with the only change being that the discussed behaviour was presented in third person. Upon using a two-way ANOVA test, we found that participants had a significant self-serving bias with flying home for holidays during the pandemic. Surprisingly, people also rated private driving as significantly more acceptable from a third person perspective. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Regularization of the Coulomb scattering problem
Creators: name: Baryshevskii, V. G.
name: Feranchuk, I. D.
name: Kats, P. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Exact solutions of the Schrödinger equation for the Coulomb potential are used in the scope of both stationary and time-dependent scattering theories in order to find the parameters which define regularization of the Rutherford cross-section when the scattering angle tends to zero but the distance r from the center remains fixed. Angular distribution of the particles scattered in the Coulomb field is investigated on the rather large but finite distance r from the center. It is shown that the standard asymptotic representation of the wave functions is not available in the case when small scattering angles are considered. Unitary property of the scattering matrix is analyzed and the "optical" theorem for this case is discussed. The total and transport cross-sections for scattering of the particle by the Coulomb center proved to be finite values and are calculated in the analytical form. It is shown that the considered effects can be essential for the observed characteristics of the transport processes in semiconductors which are defined by the electron and hole scattering in the fields of the charged impurity centers.
description: 20 pages, 6 figures
Uma adaptação da CDU para documentos musicais: a experiência da Biblioteca Municipal do Porto
Creators: name: Silva, Adriano Simões
name: Ávila, Nuno
Publisher: name: Cadernos BAD
Year: 2007

description: O presente trabalho tem como objectivo apresentar o esquema de classificação de documentos musicais proposto na Biblioteca Pública Municipal do Porto, baseado na CDU, procurando-se, deste modo, ajudar aqueles que têm por missão classificar e disponibilizar uma colecção de CD.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
Eigenvalue Decomposition of Meson Correlators
Creators: name: DeGrand, Thomas
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Euclidean space hadronic correlators are computed in quenched QCD at small quark mass using truncations of quark propagators which include or exclude low eigenvalue eigenmodes of the Dirac operator. High modes provide the dominant contribution to parity averaged correlators, especially at short distances. Differences of correlators of opposite parity receive most of their contributions from low modes and are much smaller in size than parity averages at short distances. The pion propagator in any correlator to which it couples receives a large contribution from low modes, while the tensor meson correlator receives a tiny contribution from low eigenmodes.
description: 11 pages, Revtex, 7 postscript figures
Library Portals e Subject Gateways: conceitos e características
Creators: name: Carani, Mirian
name: Nascimento, Paulo Adriano
Publisher: name: Cadernos BAD
Year: 2007

description: Este trabalho apresenta algumas definições e características básicas de Library Portals (Portais de Bibliotecas) e Subject Gateways (Directórios Temáticos), identificados na literatura especializada, com o objectivo de elucidar a finalidade de ambos e comparar os diferentes conceitos. Também se procurou abordar os conceitos de portais e gateways, genericamente, de forma a compreender melhor a terminologia Library Portals e Subject Gateways.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
Exploring Halo Substructure with Giant Stars: Spectroscopy of Stars in the Galactic Anticenter Stellar Structure
Creators: name: Crane, Jeffrey D.
name: Majewski, Steven R.
name: Rocha-Pinto, Helio J.
name: Frinchaboy, Peter M.
name: Skrutskie, Michael F.
name: Law, David R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To determine the nature of the recently discovered, ring-like stellar structure at the Galactic anticenter, we have collected spectra of a set of presumed constituent M giants selected from the 2MASS point source catalog. Radial velocities have been obtained for stars spanning ~100 degrees, exhibiting a trend in velocity with Galactic longitude and an estimated dispersion of 20 +/- 4 km/sec. A mean metallicity [Fe/H] = -0.4 +/- 0.3 measured for these stars combines with previous evidence from the literature to suggest a population with a significant metallicity spread. In addition, a curious alignment of at least four globular clusters of lower mean metallicity is noted to be spatially and kinematically consistent with this stellar distribution. We interpret the M giant sample position and velocity variation with Galactic longitude as suggestive of a satellite galaxy currently undergoing tidal disruption in a non-circular, prograde orbit about the Milky Way.
description: (1) University of Virginia, 4 pages, 3 figures, accepted for publication in The Astrophysical Journal Letters
Supplemental tables and figures for the paper "Changes in Rumen Epithelial Morphology and Transcriptome, Rumen Metabolome, and Blood Biochemical Parameters in Lactating Dairy Cows with Subacute Rumen Acidosis Following Rumen Content Transplantation".
Creators: name: Mu, Yingyu
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 300303
subject: Animal nutrition

description: Supplemental Table S1. Ingredients and nutritional composition of the conventional diet (CON) and the high-grain diet (HG)Figure S1 Principal component (PC) analysis of total genes in the rumen epithelial papilla between the donor-recipient (DR) and the self-recipient (SR) groups. PERMANOVA results with 9999 permutations are shown.Figure S2 Heatmap-like functional classification of the differentially expressed genes (DEGs) in rumen epithelial papilla between the donor-recipient (DR) and the self-recipient (SR) groups. Expression patterns of the DEGs corresponding to the (A) significantly enriched Gene Ontology biological process terms and (B) KEGG pathways at a P value of <0.05. Fold change is calculated as the average level in the DR group relative to that in the SR group.Figure S3 The orthogonal partial least squares discriminant analysis (OPLS-DA) of rumen metabolites between the donor-recipient (DR) and the self-recipient (SR) groups. The score scatter plot of the OPLS-DA model in the (A) positive and (B) negative ion modes. Permutation test plots of 200 iterations in the (C) positive and (D) negative ion modes. R2 and Q2 are fitness power and predictive power of the model, respectively.Figure S4 Metabolic pathway analysis of KEGG for differential metabolites between the donor-recipient (DR) and the self-recipient (SR) groups.
Surface Superconductivity in Niobium for Superconducting RF Cavities
Creators: name: Casalbuoni, S.
name: Knabbe, E. -A.
name: Koetzler, J.
name: Lilje, L.
name: von Sawilski, L.
name: Schmueser, P.
name: Steffen, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A systematic study is presented on the superconductivity (sc) parameters of the ultrapure niobium used for the fabrication of the nine-cell 1.3 GHz cavities for the linear collider project TESLA. Cylindrical Nb samples have been subjected to the same surface treatments that are applied to the TESLA cavities: buffered chemical polishing (BCP), electrolytic polishing (EP), low-temperature bakeout (LTB). The magnetization curves and the complex magnetic susceptibility have been measured over a wide range of temperatures and dc magnetic fields, and also for di erent frequencies of the applied ac magnetic field. The bulk superconductivity parameters such as the critical temperature Tc = 9.26 K and the upper critical field Bc2(0) = 410 mT are found to be in good agreement with previous data. Evidence for surface superconductivity at fields above Bc2 is found in all samples. The critical surface field exceeds the Ginzburg-Landau field Bc3 = 1.695Bc2 by about 10% in BCP-treated samples and increases even further if EP or LTB are applied. From the field dependence of the susceptibility and a power-law analysis of the complex ac conductivity and resistivity the existence of two different phases of surface superconductivity can be established which resemble the Meissner and Abrikosov phases in the bulk: (1) coherent surface superconductivity, allowing sc shielding currents flowing around the entire cylindrical sample, for external fields B in the range between Bc2 and Bcohc3, and (2) incoherent surface superconductivity with disconnected sc domains between Bcohc3 and Bc3. The coherent critical surface field separating the two phases is found to be Bcoh c3 = 0.81Bc3 for all samples. The exponents in the power law analysis are different for BCP and EP samples, pointing to different surface topologies.
description: 15 pages, 21 figures, DESY-Report 2004-027
A Blogosfera: perspectivas e desafios no campo da Ciência da Informação
Creators: name: Sousa, Paulo Jorge
name: Rodrigues, Eloy
name: Cunha, Murilo Basto
name: Neves, Ana
name: Santos, António Sá
name: Malheiro, Armando
name: Dudziak, Elisabeth Adriana
name: Ribeiro, Fernanda
name: Reis, Guilhermo
name: Menou, Michel
name: Ferreira, Miguel
name: Gouveia, Luis Borges
name: Santos, Robson
Publisher: name: Cadernos BAD
Year: 2007

description: Neste artigo são expostas algumas perspectivas, conceitos e reflexões sobre o acesso e o uso dos blogues, sob o prisma da Ciência da Informação. Numa primeira fase, aborda-se o crescimento exponencial dos blogues e as imprecisões na sua definição. Segue-se uma breve reflexão: os blogues como expressão do desejo das pessoas em serem ouvidas e compreendidas; o despontar de um novo modelo de comunicação em massa (Mass Self Communicaction); o blogue enquanto sistema (tecnológico) de informação, e os blogues institucionais e pessoais. Por último, aborda-se o blogue no campo da Ciência da Informação, desde a gestão à preservação da informação, ao direito de autor, à info-literacia, à aplicação dos blogues nos Serviços de Informação e aos dividendos que os profissionais da informação podem retirar dos mesmos.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
Archboldia papuensis Rand 1940
Creators: name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Ptilonorhynchidae
Archboldia
Archboldia papuensis

description: Archboldia papuensis Rand
Archboldia papuensis Rand, 1940: 9 (Bele River, 2200 meters, 18 km north of Lake Habbema, Snow Mts., Netherland [sic] New Guinea).
Now Archboldia papuensis papuensis Rand, 1940. See Rand, 1942: 498; Mayr, 1962c: 175; Gilliard, 1969: 281–293; Coates, 1990: 385–391; and Frith and Frith, 2004: 300–302; 2009a: 396.
HOLOTYPE: AMNH 305644, male, collected on the Ibele (= Bele) River, 2200 m, 18 km north of Danau Habbema (= Lake Habbema), 04.09S, 138.39E (Frith and Beehler, 1998: 568), Pegunungan Maoke (= Snow Mountains), Papua Province, Indonesia (= Netherlands New Guinea), on 3 December 1938, by Richard Archbold, A.L. Rand, and W.B. Richardson, on the 1938–1939 Archbold Expedition (no. 8490).
COMMENTS: Rand cited the AMNH number of the holotype in the original description and noted that he had three males, four females, and one unsexed specimen. The genus Archboldia was also described at the same time, with A. papuensis the type species. The seven paratypes are: Bernhard Camp, AMNH 342255, sex?, 9 February 1939; Lake Habbema, AMNH 342256–258, one male, two females, 11–29 October 1938; Ibele River, AMNH 342259–342261, one male, two females, 20 November–4 December 1938. AMNH 342258 was sent to MZB in May 1957.
For a full report on the birds collected on the 1938–1939 expedition, see Rand (1942). For a summary of this expedition, see Archbold et al. (1942) and Brass (1941). The expedition was a joint expedition with the Netherlands Indies authorities and was also known as the Indisch-Amerikaansche Expeditie.
Kusmierski et al. (1997) suggested on the basis of their mitochrondrial cytochrome- b sequences that Archboldia be included in the genus Amblyornis, but Frith and Frith (2009a: 396) have retained Archboldia. Further study is needed.
description: Published as part of Lecroy, Mary, 2014, Type Specimens Of Birds In The American Museum Of Natural History Part 12. Passeriformes: Ploceidae, Sturnidae, Buphagidae, Oriolidae, Dicruridae, Callaeidae, Grallinidae, Corcoracidae, Artamidae, Cracticidae, Ptilonorhynchidae, Cnemophilidae, Paradisaeidae, And Corvidae, pp. 1-165 in Bulletin of the American Museum of Natural History 2014 (393) on page 82, DOI: 10.1206/885.1, http://zenodo.org/record/4629954
Direct Marketing Strategies and Farmers’ Technical Efficiency in U.S. Agriculture
Creators: name: Astill, G.
name: Sabasi, D.
name: Gwatipedza, J.
name: Astill, G.
name: Sabasi, D.
name: Gwatipedza, J.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Research and Development/Tech Change/Emerging Technologies
subject: productivity
subject: direct marketing
subject: local food
subject: technical efficiency
subject: stochastic frontier analysis

description: Farmers are increasingly using direct marketing strategies that include farmers’ markets and community supported agriculture arrangements to connect with consumers who prefer locally produced food. We examine the relationship between the increasing use of direct marketing strategies and technical efficiency, using stochastic frontier analysis method. The results show that, on average, the farmers that use direct marketing strategies are less technically efficient compared to the farmers that do not. However, this result is reversed for the largest quantile of growers, on average those who use direct marketing strategies are more technically efficient than those not.
Temperature-dependent contact resistances in high-quality polymer field-effect transistors
Creators: name: Hamadani, B. H.
name: Natelson, D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Contact resistances between organic semiconductors and metals can dominate the transport properties of electronic devices incorporating such materials. We report measurements of the parasitic contact resistance and the true channel resistance in bottom contact poly(3-hexylthiophene) (P3HT) field-effect transistors with channel lengths from 400 nm up to 40 $μ$m, from room temperature down to 77 K. For fixed gate voltage, the ratio of contact to channel resistance decreases with decreasing temperature. We compare this result with a recent model for metal-organic semiconductor contacts. Mobilities corrected for this contact resistance can approach 1 cm$^{2}$/Vs at room temperature and high gate voltages.
description: 10 pages, 4 figures, accepted to Appl. Phys. Lett
Revisiting CPEC: A Corridor of Opportunities
Creators: name: Abbad Farooq
Publisher: name: figshare
Year: 2020
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: The China-Pakistan Economic Corridor (CPEC) is a "game-changer" mega project that offers colossal developmental changes at all levels in Pakistan. It is not just an economic project but has many dimensions to add to the cultural, political and societal landscape of the two countries. The geo-economics of CPEC remains crucial for the realization of 21st century as "the century belonging to Asia". Pakistan and China, have a history of close state-to-state relations at various bilateral and multilateral forums. The flagship project of Belt and Road Initiative (BRI) provides the same for a people to people and society interaction, which can allow Pakistan to learn from the best practices of the 'Chinese Dream'. The paper examines primary and secondary literature from a qualitative approach to study the 'trickle down effects' of CPEC in various branches of public and private sectors of Pakistan.
Taleqani as a Humanitarian Islamist: His Activities and Ideologies under Pahlavi Regime
Creators: name: Qolamreza Nassr
Publisher: name: figshare
Year: 2020
Subjects: subject: 160699 Political Science not elsewhere classified
subject: FOS: Political science

description: Ayatollah Seyyed Mahmoud Taleqani (1911-1979) spent most of his life opposing the tyrannical regime of Pahlavi. To save the Iranians from their tyranny, he referred to Quran because he believed it is the book for mankind’s salvation. His Quranic interpretation which was opposed by some prominent ulama, attracted some secular intellectuals who were under strong influence of ideologies such as Communism. He also expressed his discontent of ulama who condoned Pahlavi regime’s suppression, and neglected their own religious duties. Such a Taleqani’s criticism of the fellow ulama, together with his consistent support of Mosaddeq, has been regarded revolutionary. Although Taleqani has been examined in relation to the Iranian Revolution, this research aims to analyze his ideology and activity to extract some unknown characteristics under the Pahlavi’s. And the outstanding characteristic of Taleqani as a humanitarian Islamist will be finally found through the above consideration.
On the Kauffman bracket skein module of the quaternionic manifold
Creators: name: Gilmer, Patrick M.
name: Harris, John M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 59M99

description: We use recoupling theory to study the Kauffman bracket skein module of the quaternionic manifold over Z[A,A^{-1}] localized by inverting all the cyclotomic polynomials. We prove that the skein module is spanned by five elements. Using the quantum invariants of these skein elements and the Z_2 homology of the manifold, we determine that they are linearly independent.
description: corrected summation signs in figures 14, 15, 17. Other minor changes
Supplemental_material_tables_figures.docx
Creators: name: Mu, Yingyu
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 300303
subject: Animal nutrition

description: Supplemental tables and figures for the paper "Changes in Rumen Epithelial Morphology and Transcriptome, Rumen Metabolome, and Blood Biochemical Parameters in Lactating Dairy Cows with Subacute Rumen Acidosis Following Rumen Content Transplantation".
ReFreeDrive - Deliverable 6.3: Pure Synchronous Reluctance Motor for 75kW of operation (Executive Summary only)
Creators: name: Villani, Marco
name: Fabri, Giuseppe
name: Credo, Andrea
name: Benedetto, Matteo
Publisher: name: Zenodo
Year: 2021
Subjects: pure synchronous reluctance motor
manufacturing
motor assembly
stator winding
cooling jacket

description: Executive Summary corresponding to the ReFreeDrive project deliverable D6.3: "Pure Synchronous Reluctance Motor for 75kW of operation"
The Influence of Peer Interaction on Students’ Mastery of Writing
Creators: name: Nabiryo, Nancy R.
name: Sekiziyivu, Samuel
Publisher: name: figshare
Year: 2020
Subjects: Education

description: Writing is one of the four skills of language which helps in releasing strong emotions, clarifying information, stimulating memory and demonstrating mastery of content. One of the ways through which students do master writing content is peer interaction. Despite the importance of writing, employers still complain that school leavers do not know how to write, implying that either they were not taught writing or that the classroom environment, of which peer interaction is part, was not adequate enough to prepare learners for the kind of writing that they will do after school. In this paper, we explored the influence of peer interaction on writing mastery. Using interviews, focus group discussions and observation, we collected data from three secondary schools in Uganda. Our findings portrayed that peer interaction supports the mastery of different processes of writing; however, there was little interaction in class because some of the teachers and students were against it for various reasons. Therefore, there is a need for teachers and students to be trained on how to maximise the benefits of peer interaction to enable students' mastery of writing.
Blogs: mais que uma tecnologia, uma atitude
Creators: name: Eiras, Bruno Duarte
Publisher: name: Cadernos BAD
Year: 2007

description: Os blogs constituem um fenómeno relativamente recente que permite a cada pessoa, grupo ou instituição a possibilidade de se tornar autor ⁄ editor da sua própria opinião e informação e de ter uma palavra no espaço público por excelência que é a Internet. Em poucos anos, os blogs conheceram uma enorme difusão, impondo-se como um novo modelo de comunicação, uma vez que, ao contrário dos anteriores, permite a qualquer pessoa publicar um texto com bastante autonomia, existindo a hipótese de interacção com os leitores. Partindo da relação existente entre os princípios da Web 2.0 e a nova postura socioprofissional que é requerida, aborda-se a realidade dos blogs na área da documentação e informação, e de que forma estão estes profissionais mais bem preparados para enfrentar esta realidade, ao mesmo tempo que se analisa a utilização desta nova ferramenta de comunicação.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
Can large-scale farmland transfer improve agricultural productivity? Evidence from rural Jiangsu, P.R. China
Creators: name: Zhang, L.
name: Zhang, L.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: International Relations/Trade
subject: farmland transfer
subject: scale management
subject: agricultural productivity
subject: operating units
subject: Jiangsu province

description: Based on the survey data of 285 grain producing lessee operating units in Jiangsu province and applying the multiple regression model and the estimation method with clustered robust standard errors, this study compared the differences in agricultural productivity between small-scale farm households and large-scale operating units, and further indicated the efficiency impacts of large-scale farmland transfer. Results show that, compared to small-scale farm households, only part of large-scale operating units can obtain higher agricultural productivity. Operation scale of 40 ~ 60 mu is the moderate scale where operating units can achieve the optimal allocative efficiency of agricultural production factors (i.e., land, labor, and capital). Specifically, compared to small-scale farm households (1 ~ 20 mu), those operating units, with an operation scale ranging from 10 to 15 times of the area of arable land contracted per household in local area (40 ~ 60 mu), can achieve higher land productivity, profit rate of cost, and total factor productivity; whereas those operating units with an operation scale more than 40 mu (including 40 ~ 60 mu, 60 ~ 120 mu, 120 ~ 500 mu) can obtain greater labor productivity.
Blogues e Bibliotecas: construir redes na Web 2.0
Creators: name: Alvim, Luísa
Publisher: name: Cadernos BAD
Year: 2007

description: Os serviços das bibliotecas podem ser repensados com os princípios, modelos, métodos e tecnologias da Web 2.0, na qual o blogue, enquanto ferramenta de escrita e de leitura colaborativa, ocupa um lugar especial. Este trabalho pretende apresentar a ferramenta blogue nas bibliotecas em duas perspectivas principais: blogues como fontes de informação nos serviços internos das bibliotecas; e blogues como ferramentas que as bibliotecas podem usar para promover os seus serviços e proporcionar canais de comunicação com os seus utilizadores. Em Portugal, o fenómeno ainda tem pouco desenvolvimento no que concerne às bibliotecas, são apresentados, neste trabalho, o recenseamento e a análise da blogosfera relacionada com as bibliotecas públicas, universitárias e escolares.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
On homotopy properties of solutions of some differential inclusions in the $W^{1,p}$-topology
Creators: name: Caponio, Erasmo
name: Masiello, Antonio
name: Suhr, Stefan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 34A60, 58B05, 93C10

description: We consider a differential inclusion on a manifold, defined by a field of open half-spaces whose boundary in each tangent space is the kernel of a one-form. We make the assumption that the corank one distribution associated to the kernel is completely nonholonomic of step 2. We identify a subset of solutions of the differential inclusion, satisfying two endpoints and periodic boundary conditions, which are homotopy equivalent in the $W^{1,p}$-topology, for any $p\in [1,+\infty)$, to the based loop space and the free loop space respectively.
description: AMS-LaTex, 18 pages; v2: fully revised version
Why Ni$_3$Al is an itinerant ferromagnet but Ni$_3$Ga is not
Creators: name: Aguayo, A.
name: Mazin, I. I.
name: Singh, D. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Ni$_3$Al and Ni$_3$Ga are closely related materials on opposite sides of a ferromagnetic quantum critical point. The Stoner factor of Ni is virtually the same in both compounds and the density of states is larger in Ni$_3$Ga. So, according to the Stoner theory, it should be more magnetic, and, in LDA calculations, it is. However, experimentally, it is a paramagnet, while Ni$_3$Al is an itinerant ferromagnet. We show that the critical spin fluctuations are stronger than in Ni$_3$Ga, due to a weaker q-dependence of the susceptibility, and this effect is strong enough to reverse the trend. The approach combines LDA calculations with the Landau theory and the fluctuation-dissipation theorem using the same momentum cut-off for both materials. The calculations provide evidence for strong, beyond LDA, spin fluctuations associated with the critical point in both materials, but stronger in Ni$_3$Ga than in Ni$_3$Al.
description: replaced (incorrect version submitted)
Metals in the Intergalactic Medium
Creators: name: Aracil, Bastien
name: Petitjean, Patrick
name: Pichon, Christophe
name: Bergeron, Jacqueline
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use high spectral resolution (R=45000) and high signal-to-noise ratio (S/N \~ 35-70 per pixel) spectra of 19 high-redshift (2.11. Our observations strongly suggest that the CIV/HI ratio decreases with decreasing tau(HI) with log[tau(CIV)]=1.3xlog[tau(HI)]-3.2. We do not detect CIV absorption statistically associated with gas of tau(HI)<1. However, we observe that a small fraction of the low density gas is associated with strong metal lines as a probable consequence of the IGM enrichment being highly inhomogeneous. We detect the presence of OVI down to tau(HI)~0.2 with log[tau(OVI)/tau(HI)] -2.0. We show that OVI absorption in the lowest density gas is located within ~300 km/s from strong HI lines. This suggests that this OVI phase may be part of winds flowing away from overdense regions. This effect is more important at the largest redshifts (z>2.4). Therefore, at the limit of present surveys, the presence of metals in the underdense regions of the IGM is still to be demonstrated.
description: 9 pages, 10 figures, accepted in A&A
Prospects of accelerator and reactor neutrino oscillation experiments for the coming ten years
Creators: name: Huber, P.
name: Lindner, M.
name: Rolinec, M.
name: Schwetz, T.
name: Winter, W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze the physics potential of long baseline neutrino oscillation experiments planned for the coming ten years, where the main focus is the sensitivity limit to the small mixing angle $θ_{13}$. The discussed experiments include the conventional beam experiments MINOS, ICARUS, and OPERA, which are under construction, the planned superbeam experiments J-PARC to Super-Kamiokande and NuMI off-axis, as well as new reactor experiments with near and far detectors, represented by the Double-Chooz project. We perform a complete numerical simulation including systematics, correlations, and degeneracies on an equal footing for all experiments using the GLoBES software. After discussing the improvement of our knowledge on the atmospheric parameters $θ_{23}$ and $Δm^2_{31}$ by these experiments, we investigate the potential to determine $θ_{13}$ within the next ten years in detail. Furthermore, we show that under optimistic assumptions and for $θ_{13}$ close to the current bound, even the next generation of experiments might provide some information on the Dirac CP phase and the type of the neutrino mass hierarchy.
description: 38 pages, 13 figures, Eqs. (1) and (5) corrected, small corrections in Figs. 8, 9, and Tab. 4, discussion improved, ref. added, version to appear in PRD, high resolution figures are available at http://www.sns.ias.edu/~winter/figs0403068.html
Gated nonlinear transport in organic polymer field effect transistors
Creators: name: Hamadani, B. H.
name: Natelson, D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We measure hole transport in poly(3-hexylthiophene) field effect transistors with channel lengths from 3 $μ$m down to 200 nm, from room temperature down to 10 K. Near room temperature effective mobilities inferred from linear regime transconductance are strongly dependent on temperature, gate voltage, and source-drain voltage. As $T$ is reduced below 200 K and at high source-drain bias, we find transport becomes highly nonlinear and is very strongly modulated by the gate. We consider whether this nonlinear transport is contact limited or a bulk process by examining the length dependence of linear conduction to extract contact and channel contributions to the source-drain resistance. The results indicate that these devices are bulk-limited at room temperature, and remain so as the temperature is lowered. The nonlinear conduction is consistent with a model of Poole-Frenkel-like hopping mechanism in the space-charge limited current regime. Further analysis within this model reveals consistency with a strongly energy dependent density of (localized) valence band states, and a crossover from thermally activated to nonthermal hopping below 30 K.
description: 22 pages, 7 figures, accepted to J. Appl. Phys
Multi-Step Traffic Prediction for Multi-Period Planning in Optical Networks
Creators: name: Maryam, Hafsa
name: Panayiotou, Tania
name: Ellinas, Georgios
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: A multi-period planning framework is proposed that exploits multi-step ahead traffic predictions to address service overprovisioning and improve adaptability to traffic changes, while ensuring the necessary quality-of-service (QoS) levels. An encoder-decoder deep learning model is initially leveraged for multi-step ahead prediction by analyzing real-traffic traces. This information is then exploited by multi-period planning heuristics to efficiently utilize available network resources while minimizing undesired service disruptions (caused due to lightpath re-allocations), with these heuristics outperforming a single-step ahead prediction approach.
Blogs, los nuevos Colegios Invisibles (Espacios de creación, diálogo y aprendizaje)
Creators: name: García, Catuxa Seoane
Publisher: name: Cadernos BAD
Year: 2007

description: Internet y las nuevas herramientas sociales propiás de la Web 2.0 han modificado nuestra forma de comunicarnos y acceder a la información. La democratización de la publicación de los contenidos en la Web y la extensión del fenómeno blog facilitan la libertad de comunicación y contribuyen a la difusión del conocimiento de manera rápida y libre por todo aquel que tenga algo que aportar. Se analizan los usos y aplicaciones de los weblogs como herramientas de creación de contenidos y gestión del conocimiento y se pro p o n e n posibles usos y aplicaciones de este nuevo formato para los profesionales de la información y los centros bibliotecarios.
description: Cadernos BAD, N.º 1 (2007): Novos Espaços na Web: Os Blogs na Área da Documentação e Informação
Two-Loop Helicity Amplitudes for Quark-Gluon Scattering in QCD and Gluino-Gluon Scattering in Supersymmetric Yang-Mills Theory
Creators: name: Bern, Z.
name: De Freitas, A.
name: Dixon, L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the two-loop QCD helicity amplitudes for quark-gluon scattering, and for quark-antiquark annihilation into two gluons. These amplitudes are relevant for next-to-next-to-leading order corrections to (polarized) jet production at hadron colliders. We give the results in the `t Hooft-Veltman and four-dimensional helicity (FDH) variants of dimensional regularization. The transition rules for converting the amplitudes between the different variants are much more intricate than for the previously discussed case of gluon-gluon scattering. Summing our two-loop expressions over helicities and colors, and converting to conventional dimensional regularization, gives results in complete agreement with those of Anastasiou, Glover, Oleari and Tejeda-Yeomans. We describe the amplitudes for 2 to 2 scattering in pure N=1 supersymmetric Yang-Mills theory, obtained from the QCD amplitudes by modifying the color representation and multiplicities, and verify supersymmetry Ward identities in the FDH scheme.
description: 77 pages. v2: corrected errors in eqs. (3.7) and (3.8) for one-loop assembly; remaining results unaffected
Experimental Bell Inequality Violation with an Atom and a Photon
Creators: name: Moehring, D. L.
name: Madsen, M. J.
name: Blinov, B. B.
name: Monroe, C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report the measurement of a Bell inequality violation with a single atom and a single photon prepared in a probabilistic entangled state. This is the first demonstration of such a violation with particles of different species. The entanglement characterization of this hybrid system may also be useful in quantum information applications.
description: 4 pages, 2 figures
Les effets de la reforme de la PAC sur les marches cerealiers communautaires: Analyse exploratoire
Impact of the CAP reform on the EC grain sector: an issue-specific analysis
Creators: name: Guyomard, Herve
name: Le Mouel, Chantal
name: Surry, Yves
name: Guyomard, Herve
name: Le Mouel, Chantal
name: Surry, Yves
Publisher: name: Unknown
Year: 1993
Subjects: subject: Agricultural and Food Policy
subject: Demand and Price Analysis
subject: International Relations/Trade
subject: Productivity Analysis
subject: CAP reform
subject: grains
subject: compensatory payments
subject: policy price transmission

description: The purpose of this paper is three-fold. First, we analyse and compare the welfare effects of two CAP reform scenarios in the grain sector, a fully decoupled one in which compensatory payments for grains are perceived as production neutral and a fully coupled one where compensatory payments are considered as price complements and taken into account by farmers in their production decisions. We show that the decoupled assumption will lead to a larger surplus for EC grain producers than the copuled scenario. Second, we discuss the implications of breaking down grains into three distinct commodities, i.e., wheat, maize and coarse grains, for the analysis of the effect of the CAP reform in the EC grain sector. We istimate policy price transmission equations for these three grains and integrate this additional "domestic market" dimension in the analysis. The estimation results show that policy price transmission, i.e., the transmission of institutional price changes to market prices, is imperfect and that own-price elasticities, on both the supply side and the demand side, differ largely. As a result, the response of each cereal to institutional price cuts is likely to be different. Third, the implications of assuming coupled or decoupled compensatory payments for grains and of considering market price responses to policy price changes are assessed by conducting specific simulation exercises. These simulations are based on a revised and extended version of the model MISS (Modele international simplifie de simulation), which considers explicitly the three cereals and incorporates policy price transmission equations for these three commodities. The disaggregation of grains is based on a weak separability assumption, on both the supply side and the demand side, between wheat, maize and other coarse grains on one hand, and other netputs taken into account in the model on the other hand. The empirical illustration shows clearly the relevance of the theoretical analysis and highlights the sensitivity of grain balances in the Community to both the coupled versus decoupled assumption and the perfect versus imperfect policy price transmission hypothesis. Finally, this analysis raises the question of the compatibility between the CAP reform and a GATT agreement defined on the basis of the Washington compromise.
Phantom k-essence cosmologies
Creators: name: Aguirregabiria, Juan M.
name: Chimento, Luis P.
name: Lazkoz, Ruth
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We devise a method to obtain a phantom version of FRW k-essence cosmologies with homogeneous k-fields by applying form-invariance transformations. It can be seen that the transformation performs the maps $H\toH$ and $ρ+p\to-(ρ+p)$, which in turn give $γ\toγ$ and $a\to a^{-1}$. The discussion is presented in a general setup, valid for FRW k-essence cosmologies, and then we discuss power-law solutions for illustration purposes. First, we deal with models such that the gradient of the k-field is not constant, which include standard and generalized tachyon cosmologies. We concentrate on the usual tachyon and show the phantom symmetry involves a change in the potential and that it generates an extended super-accelerated tachyon field. Then, we turn our attention to models for which the time derivative of the k-field is not constant, and we show the transformation can be implemented without changing the potential at all.
description: 4 pages
Scenopoeetes dentirostris subsp. minor Mathews
Creators: name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Ptilonorhynchidae
Scenopoeetes
Scenopoeetes dentirostris
Scenopoeetes dentirostris minor mathews

description: Scenopoeetes dentirostris minor Mathews
Scenopoeetes dentirostris minor Mathews, 1915a: 132 (Johnstone River, Queensland).
Now Scenopoeetes dentirostris (Ramsay, 1876). See Mathews, 1926: 307–312; 1930: 889; Mayr and Jennings, 1952: 3–4; Mayr, 1962c: 175; Gilliard, 1969: 273–281; Schodde and Mason, 1999: 625; Dickinson, 2003: 427; and Frith and Frith, 2004: 257–259; 2009a: 394.
LECTOTYPE: AMNH 679423, male, collected on the Johnstone River, 17.31S, 146.04E (USBGN, 1957), Queensland, Australia, on 23 June 1900, by E. Olive (no. 63). From the Mathews Collection (no. 4295) via the Rothschild Collection.
COMMENTS: In the original description, Mathews gave Johnstone River as the collecting locality of the type, without any further identifying information. Mathews had six specimens from the Johnstone River, cataloged by him as numbers 4293–4298. AMNH 679423 bears in addition to Olive’s original label, a Mathews label with ‘‘Type’’ and ‘‘minor’’ in his hand and a Rothschild type label, both marked with Mathews catalog number, although this was not cited in the original description. Hartert (1929a: 55), by listing as the type the single specimen collected by Olive on 23 June 1900 thereby designated it the lectotype. He also noted that this type specimen is juvenile and has the wing and tail feathers abraded, giving an unusually small wing measurement for the type. The five paralectotypes, all collected by Olive on the Johnstone River in June 1900, are: AMNH 679422, 679424, 679425, males, and AMNH 679426, 679427, females.
These specimens were reported on by Robinson and Laverock (1900: 623) under the name Tectonornis dentirostris and were said to have come from Mount Bellenden Ker, although all the labels are marked ‘‘Johnstone River.’’
description: Published as part of Lecroy, Mary, 2014, Type Specimens Of Birds In The American Museum Of Natural History Part 12. Passeriformes: Ploceidae, Sturnidae, Buphagidae, Oriolidae, Dicruridae, Callaeidae, Grallinidae, Corcoracidae, Artamidae, Cracticidae, Ptilonorhynchidae, Cnemophilidae, Paradisaeidae, And Corvidae, pp. 1-165 in Bulletin of the American Museum of Natural History 2014 (393) on page 81, DOI: 10.1206/885.1, http://zenodo.org/record/4629954
Farmers’ Net Income Distribution and Regional Vulnerability to Climate Change: An Empirical Study of Bangladesh
Creators: name: Alamgir, M.S.
name: Furuya, J.
name: Kobayashi, S.
name: Salam, M.A.
name: Alamgir, M.S.
name: Furuya, J.
name: Kobayashi, S.
name: Salam, M.A.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: International Development
subject: income distribution
subject: cost distribution
subject: vulnerable region
subject: adaptation measures
subject: Bangladesh

description: Widespread poverty is the most serious threat and social problem that Bangladesh faces. Regional vulnerability to climate change threatens to escalate the magnitude of this poverty. It is essential that projections of poverty be made while bearing in mind the effects of climate change. The current study uses analysis of variance, cluster analysis, and log-normal distribution to estimate the parameters of income variability that ascertain vulnerability levels and help us understand the poverty levels that climate change could potentially incur. The analytical results show that variances of rice income contribute to the agricultural income differences. Constant reduction of rice yield due to climate change in Bangladesh is not so severe problems for farmers. However, poverty rates in Mymensingh, Rajshahi, and Rangpur region would be affected by unexpected yield loss due to climate change. Therefore, research and development of adaptation measures to climate change for regions where farmers are largely dependent on agricultural income is important.