cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Automatic Acquisition Of Knowledge For Solving Analysis Tasks
Creators: name: Patel, Jitendra M
Publisher: name: The Open University
Year: 1990

description: The extraction of knowledge from domain experts for the purpose of building expert systems has been found to be a difficult and a time- consuming enterprise. Researchers have therefore looked at the - possibility of automating this task of knowledge acquisition. The existing knowledge acquisition systems rely on either some task-specific knowledge or general techniques for knowledge elicitation for obtaining problem-solving expertise from domain experts. Generally, systems which employ task-specific knowledge produce better problem-solving expertise than those systems which use elicitation techniques. However, the scope of applicability of former systems is relatively narrow. This is the central problem addressed in this thesis: to design a knowledge acquisition system which can be applied over a wide range of tasks with the purpose of acquiring useful problem-solving knowledge. The thesis presents a methodology and a system for knowledge acquisition called ASKE. The methodology prescribes that knowledge acquisition should start by defining the task and then use the developed task-model to acquire domain specific knowledge. ASKE is able to support this process by allowing the user to construct task-models and by being able to effectively use them for acquiring domain expertise. The advantage of progressing in this manner is two-fold: firstly, it widens the scope of applicability of the knowledge acquisition system; and, secondly, it makes possible the construction of knowledge-bases that exhibit expert performance. ASKE contains knowledge engineering expertise which it uses to help domain experts encode their problem-solving expertise directly into a knowledge-base. The system derives its power from the templates which encode knowledge. The templates serve a triple function: they represent knowledge - their normal function; they encode expectations of the kind of knowledge that is to be acquired; and, they serve as a guide for how problem-solving knowledge may be organized so as to facilitate its encapsulation into a knowledge-base.
Entangling flux qubits with a bipolar dynamic inductance
Creators: name: Plourde, B. L. T.
name: Zhang, J.
name: Whaley, K. B.
name: Wilhelm, F. K.
name: Robertson, T. L.
name: Hime, T.
name: Linzen, S.
name: Reichardt, P. A.
name: Wu, C. -E.
name: Clarke, John
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme to implement variable coupling between two flux qubits using the screening current response of a dc Superconducting QUantum Interference Device (SQUID). The coupling strength is adjusted by the current bias applied to the SQUID and can be varied continuously from positive to negative values, allowing cancellation of the direct mutual inductance between the qubits. We show that this variable coupling scheme permits efficient realization of universal quantum logic. The same SQUID can be used to determine the flux states of the qubits.
description: 4 pages, 4 figures
Inf-VAE: A Variational Autoencoder Framework to Integrate Homophily and Influence in Diffusion Prediction
Creators: name: Sankar, Aravind
name: Zhang, Xinyang
name: Krishnan, Adit
name: Han, Jiawei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent years have witnessed tremendous interest in understanding and predicting information spread on social media platforms such as Twitter, Facebook, etc. Existing diffusion prediction methods primarily exploit the sequential order of influenced users by projecting diffusion cascades onto their local social neighborhoods. However, this fails to capture global social structures that do not explicitly manifest in any of the cascades, resulting in poor performance for inactive users with limited historical activities. In this paper, we present a novel variational autoencoder framework (Inf-VAE) to jointly embed homophily and influence through proximity-preserving social and position-encoded temporal latent variables. To model social homophily, Inf-VAE utilizes powerful graph neural network architectures to learn social variables that selectively exploit the social connections of users. Given a sequence of seed user activations, Inf-VAE uses a novel expressive co-attentive fusion network that jointly attends over their social and temporal variables to predict the set of all influenced users. Our experimental results on multiple real-world social network datasets, including Digg, Weibo, and Stack-Exchanges demonstrate significant gains (22% MAP@10) for Inf-VAE over state-of-the-art diffusion prediction models; we achieve massive gains for users with sparse activities, and users who lack direct social neighbors in seed sets.
description: International Conference on Web Search and Data Mining (WSDM 2020)
CP violation in B --> phi K_S decay at large tan(beta)
Creators: name: Baek, Seungwon
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the chargino contribution to the CP violation in B \to ϕK_S decay in the minimal supersymmetric standard model at large \tanβ. It is shown that the Wilson coefficient C_{8g} of the chromomagnetic penguin operator can be significantly enhanced by the chargino-mediated diagrams while satisfying other direct/indirect experimental constraints. The enhanced C_{8g} allows large deviation in the CP asymmetry from the standard model prediction.
description: 6 pages, 2 figures, talk presented at 2nd International Conference on Flavor Physics
ЕМОЦІЙНЕ ІНФІКУВАННЯ В УПРАВЛІННІ ІННОВАЦІЙНИМИ ПРОЄКТАМИ В УМОВАХ КРИЗИ
Creators: name: Бушуєв Денис Антонович
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering

description: Розглянуто проблеми емоційного інфікування зацікавлених сторін інноваційного проєкту в умовах кризи. В процесах управління інноваційними проєктами менеджери намагаються моделювати творчу поведінку і ґрунтуються на креативних технологіях. Емоційне зараження розглядається як соціально-психологічний механізм передачі психічного настрою менеджера іншим зацікавленим сторонам інноваційного проєкту, емоційного впливу в умовах безпосереднього контакту і включення особистості в певні психічні стани, які впливають на ефективність управління. Основним об'єктом креативних технологій є менеджер або група, завдання яких полягало у вихованні, освіті та створенні організації нової поведінки в несприятливих, смертельно небезпечних і агресивних зовнішніх умовах. В умовах кризи емоціональна поведінка менеджера проєкту та його інфікування команди проєкту посилюється внаслідок зовнішньої невизначеності. Модель інфікування зацікавлених сторін побудована на основі розуміння життєвого циклу менеджеру проєкту, який наведено у вигляді кривої персональних змін менеджера інноваційних проєктів та програм. Емоції розглядаються за змістом, відображаючи різні аспекти та значення, які їх викликали. З метою застосування психофізіологічної формули оцінки впливів емоційного стану зацікавлених сторін інноваційних проєктів трансформовано ці впливи на компетентнісну модель управління інноваційними проєктами. Наведено приклади оцінок змін компетентності менеджера та команди проєкту при стенічних та астенічних емоціях.
Does climate change cause conflict? Damned if you do, damned if you don’t
Creators: name: Gatti, N.
name: Baylis, K.
name: Crost, B.
name: Gatti, N.
name: Baylis, K.
name: Crost, B.
Publisher: name: Unknown
Year: 2018
Subjects: Environmental Economics and Policy
International Development

description: Using detailed data on conflict-related incidents in Indonesia, we exploit seasonal variation in the relationship between rainfall and agricultural production to study the mechanism linking climate change and conflict. Furthermore, we ask whether irrigation and dam infrastructure help mitigate this link. We find that wet-season rainfall decreases production while rainfall during the dry season is beneficial for production. If agriculture is the mechanism through which climate change affects conflict, then we should expect the opposite effect on conflict, but with one-year lag. Our results show that, as expected, dry-season rainfall decreases conflict in Indonesia and in agricultural regions like Java, while wet-season rainfall increases conflict. In the latter, we find that irrigation increases conflict instead of reducing it. For Indonesia, irrigation reduces the effect of conflict during the dry season and amplifies it during the wet season. A plausible explanation is that the irrigation network is not well adapted to agriculture necessities which could generate civil unrest when a weather shock occurs. A policy that aim to reducing the impact of climate change on civil conflict should consider these drawbacks.
Anomiopus lauropalui Valois & Vaz-de-Mello & Silva 2020, comb. nov
Creators: name: Valois, Marcely C.
name: Vaz-de-Mello, Fernando Z.
name: Silva, Fernando A. B.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Anomiopus
Anomiopus lauropalui

description: Notes on Anomiopus lauropalui (Vulcano and Pereira, 1973) comb. nov
 In their original description, Vulcano and Pereira (1973) described (and illustrated) S. lauropalui with three teeth on the apical third of the protibial edge, with all teeth directed forward. The authors used these characteristics to assign the new species to the genus Scatonomus. However, after the examination of the holotype, we agree that the protibial teeth are positioned at the apical half of the external edge, and only the apical tooth is directed forward. This finding means that this species belongs to Anomiopus instead of Scatonomus. Therefore, we propose the new combination Anomiopus lauropalui (Vulcano and Pereira 1973). Within Anomiopus, this species is easily distinguished from any other by two tufts of setae on the interocular space (Vulcano and Pereira 1973, Fig 2). Canhedo (2006) divided the species of Anomiopus into three species groups, and A. lauropalui best fits the diagnosis of the group smaragdinus, in which the species can be arranged based mainly on the absence of a tooth transversely inserted on the dorso-lateral surface of metatibiae, and by having at least the first metatarsomere emarginate at the apex (Canhedo 2006).
description: Published as part of Valois, Marcely C., Vaz-de-Mello, Fernando Z. & Silva, Fernando A. B., 2020, A taxonomic revision of the Neotropical genus Scatonomus Erichson, 1835 (Coleoptera: Scarabaeidae: Scarabaeinae), pp. 1081-1114 in Journal of Natural History 54 (17 - 18) on page 1110, DOI: 10.1080/00222933.2020.1781947, http://zenodo.org/record/5020903
Correlations Between Black Holes and Host Galaxies in the Illustris and IllustrisTNG Simulations
Creators: name: Li, Yuan
name: Habouzit, Melanie
name: Genel, Shy
name: Somerville, Rachel
name: Terrazas, Bryan A.
name: Bell, Eric F.
name: Pillepich, Annalisa
name: Nelson, Dylan
name: Weinberger, Rainer
name: Rodriguez-Gomez, Vicente
name: Ma, Chung-Pei
name: Pakmor, Ruediger
name: Hernquist, Lars
name: Vogelsberger, Mark
Publisher: name: arXiv
Year: 2019
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study black hole - host galaxy correlations, and the relation between the over-massiveness (the distance from the average $M_{BH}-σ$ relation) of super-massive black holes (SMBHs) and star formation histories of their host galaxies in the Illustris and TNG100 simulations. We find that both simulations are able to produce black hole scaling relations in general agreement with observations at $z=0$, but with noticeable discrepancies. Both simulations show an offset from the observations for the $M_{BH}-σ$ relation, and the relation between $M_{BH}$ and the Sersic index. The relation between $M_{BH}$ and stellar mass $M_*$ is tighter than the observations, especially for TNG100. For massive galaxies in both simulations, the hosts of over-massive SMBHs (those above the mean $M_{BH}-σ$ relation) tend to have larger Sersic indices and lower baryon conversion efficiency, suggesting a multidimensional link between SMBHs and properties of their hosts. In Illustris, the hosts of over-massive SMBHs have formed earlier and have lower present-day star formation rates, in qualitative agreement with the observations for massive galaxies with $σ>100 \rm km/s$. For low-mass galaxies, such a correlation still holds in Illustris but does not exist in the observed data. For TNG100, the correlation between SMBH over-massiveness and star formation history is much weaker. The hosts of over-massive SMBHs generally have consistently larger star formation rates throughout history. These galaxies have higher stellar mass as well, due to the strong $M_{BH}-M_*$ correlation. Our findings show that simulated SMBH scaling relations and correlations are sensitive to features in the modeling of SMBHs.
description: 18 pages, 11 figures, submitted to ApJ
Interface-resolved direct numerical simulations of sediment transport in a turbulent oscillatory boundary layer
Creators: name: Mazzuoli, Marco
name: Blondeaux, Paolo
name: Vittori, Giovanna
name: Uhlmann, Markus
name: Simeonov, Julian
name: Calantoni, Joseph
Publisher: name: arXiv
Year: 2019
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences
subject: 76F65

description: The flow within an oscillatory boundary layer, which approximates the flow generated by propagating sea waves of small amplitude close to the bottom, is simulated numerically by integrating Navier-Stokes and continuity equations. The bottom is made up of spherical particles, free to move, which mimic sediment grains. The approach allows to fully-resolve the flow around the particles and to evaluate the forces and torques that the fluid exerts on their surface. Then, the dynamics of sediments is explicitly computed by means of Newton-Euler equations. For the smallest value of the flow Reynolds number presently simulated, the flow regime turns out to fall in the intermittently turbulent regime such that turbulence appears when the free stream velocity is close to its largest values but the flow recovers a laminar like behaviour during the remaining phases of the cycle. For the largest value of the Reynolds number turbulence is significant almost during the whole flow cycle. The evaluation of the sediment transport rate allows to estimate the reliability of the empirical predictors commonly used to estimate the amount of sediments transported by the sea waves. For large values of the Shields parameter, the sediment flow rate during the accelerating phases does not differ from that observed during the decelerating phases. However, for relatively small values of the Shields parameter, the amount of moving particles depends not only on the bottom shear stress but also on flow acceleration. Moreover, the numerical results provide information on the role that turbulent eddies have on sediment dynamics.
description: 33 pages, 24 figures, Pre-print of manuscript accepted by Journal of Fluid Mechanics
Equivalence of Noether charge and Hilbert action boundary term formulas for the black hole entropy in $F(R_{abcd})$ gravity theory
Creators: name: Guo, Wei
name: Guo, Xiyao
name: Li, Mingfeng
name: Mou, Zili
name: Zhang, Hongbao
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By working with the covariant phase space formalism, we have shown that not only can the Hamiltonian conjugate to a Killing vector field $ξ$ be expressed as the sum of the associated Noether charge and $ξ$ contracted with the Hilbert action boundary term for $F(R_{abcd})$ gravity, but also be written as its contraction with another $ξ$ independent tensor field. With this, we have proven the equivalence of Noether charge and Hilbert action boundary term formulae for the stationary black hole entropy in $F(R_{abcd})$ gravity, which is further substantiated by our explicit computation using both formulae.
description: additional erroneous term in (48) and (49) removed, result unchanged; title adjusted to the journal version
КОНЦЕПЦІЯ ОНТОЛОГІЙ У МОДЕЛЮВАННІ СИСТЕМИ УПРАВЛІННЯ МІСЬКОЮ ЛОГІСТИЧНОЮ ІНФРАСТРУКТУРОЮ
Creators: name: Бушуєв Сергій Дмитрович
name: Чуб Ольга Ігорівна
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering

description: Управління логістичною інфраструктурою великого міста передбачає постановку і формалізацію завдань управління і контролю за розвитком сукупності об’єктів, що утворюють логістичну інфраструктуру, а також створення та впровадження відповідного прикладного інформаційного забезпечення. Розглянуто складові системи управління міською логістичною інфраструктурою і розроблено її множину взаємопов’язаних моделей предметних областей управління на основі онтологічного підходу як базис інструментальних засобів перетворення інформації, яка є критичною для підвищення ефективності системи управління. Створення системи подібних моделей допоможе адаптувати досліджувані інформаційні потоки до зміни зовнішніх та внутрішніх умов, а також інтегрувати різнорідні предметні галузі в рамках спільного розв’язання стратегічних задач управління міською логістичною структурою
From Super-Yang-Mills Theory to QCD: Planar Equivalence and its Implications
Creators: name: Armoni, A.
name: Shifman, M.
name: Veneziano, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review and extend our recent work on the planar (large N) equivalence between gauge theories with varying degree of supersymmetry. The main emphasis is made on the planar equivalence between N=1 gluodynamics (super-Yang-Mills theory) and a non-supersymmetric "orientifold field theory." We outline an "orientifold" large N expansion, analyze its possible phenomenological consequences in one-flavor massless QCD, and make a first attempt at extending the correspondence to three massless flavors. An analytic calculation of the quark condensate in one-flavor QCD starting from the gluino condensate in N=1 gluodynamics is thoroughly discussed. We also comment on a planar equivalence involving N=2 supersymmetry, on "chiral rings" in non-supersymmetric theories, and on the origin of planar equivalence from an underlying, non-tachyonic type-0 string theory. Finally, possible further directions of investigation, such as the gauge/gravity correspondence in large-N orientifold field theory, are briefly discussed.
description: 106 pages, LaTex. 15 figures. v2:minor changes, refs. added. To be published in the Ian Kogan Memorial Collection "From Fields to Strings: Circumnavigating Theoretical Physics," World Scientific, 2004
SNEWS: The SuperNova Early Warning System
Creators: name: Antonioli, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper provides a technical description of the SuperNova Early Warning System (SNEWS), an international network of experiments with the goal of providing an early warning of a galactic supernova.
description: 25 pages, for New Journal of Physics Focus Issue on Neutrino Physics
Strepera graculina subsp. robinsoni Mathews 1912
Creators: name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Cracticidae
Strepera
Strepera graculina
Strepera graculina robinsoni mathews

description: Strepera graculina robinsoni Mathews
Strepera graculina robinsoni Mathews, 1912a: 443 (North Queensland).
Now Strepera graculina robinsoni Mathews, 1912. See Amadon, 1951: 24–25; 1962b: 170; Schodde and Mason, 1999: 551–554; Dickinson, 2003: 463; and Russell and Rowley, 2009: 340–341.
HOLOTYPE: AMNH 673608, adult male, collected on the Johnstone River, 17.31S, 146.04E (USBGN, 1957), northern Queensland, Australia, on 19 June 1900, by E. Olive (no. 65). From the Mathews Collection (no. 4287) via the Rothschild Collection.
COMMENTS: In the original description, Mathews gave his catalog number of the holotype and the range as North Queensland. The type does not now bear a ‘‘Figured’’ label, but it was the model for Mathews (1923b: pl. 488, bottom fig., opp. p. 406, text p. 407) where he confirmed that the specimen collected on the ‘‘Johnson River, North Queensland’’ on 19 June 1900 is the type of robinsoni.
The following are paratypes: Johnstone River, AMNH 673606, 673607, 673609– 673612 (Mathews nos. 4285, 4286, 4288, 4290, 4291, 4292), three males, three females, collected 19–20 June 1900, by Olive; Cooktown, AMNH 673614 (3646), male, 3 July 1900, AMNH 673616 (4289), male, 18 July 1896, both collected by Olive; Mackay, AMNH 673618 (6466), no other data. AMNH 673613 and 673615, collected by Olive at Bellenden Ker and Cooktown in 1899 were not cataloged by Mathews until November 1913 (nos. 18166, 18167), after the publication of robinsoni on 31 January 1912. AMNH 673617 is an Olive skin of this form but was never in the Mathews Collection.
H.C. Robinson had Olive make a collection of birds for him in 1899 and 1900, which was reported on by Robinson and Laverock (1900: 617–653). Part of this collection was purchased by Mathews and part by Rothschild.
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 pages 75-76, DOI: 10.1206/885.1, http://zenodo.org/record/4629954
Notícias
Creators: name: BAD, Cadernos
Publisher: name: Cadernos BAD
Year: 2004

description: - Bibliotecas da Fundação Gulbenkian - Centro de Documentação Italiano - Código a utilizar em matéria de publicações científicas - Comité Consultivo Internacional de Bibliografia - Curso de Bibliotecário- Arquivista da Faculdade de Letras da Universidade de Coimbra - I Congresso Internacional de Reprografia - Publicações sobre bibliossanidade, editadas pela Inspecção Superior de Bibliotecas e Arquivos e pelo Centro de Estudos do Livro Português - A UNESCO e as bibliotecas e arquivos
description: Cadernos BAD, N.º 2 (1963)
The Wetting of H$_2$O by CO$_2$
Creators: name: Brookes, Samuel G. H.
name: Kapil, Venkat
name: Schran, Christoph
name: Michaelides, Angelos
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Biphasic interfaces are complex but fascinating regimes that display a number of properties distinct from those of the bulk. The CO$_2$-H$_2$O interface, in particular, has been the subject of a number of studies on account of its importance for the carbon life cycle as well as carbon capture and sequestration schemes. Despite this attention, there remain a number of open questions on the nature of the CO$_2$-H$_2$O interface, particularly concerning the interfacial tension and phase behavior of CO$_2$ at the interface. In this paper, we seek to address these ambiguities using ab initio-quality simulations. Harnessing the benefits of machine-learned potentials and enhanced statistical sampling methods, we present an ab initio-level description of the CO$_2$-H$_2$O interface. Interfacial tensions are predicted from 1-500 bar and found to be in close agreement with experiment at the pressures for which experimental data is available. Structural analyses indicate the build-up of an adsorbed, saturated CO$_2$ film forming at low pressure (20 bar) with properties similar to those of the bulk liquid, but preferential perpendicular alignment with respect to the interface. CO$_2$ monolayer build-up coincides with a reduced structuring of water molecules close to the interface. This study highlights the predictive nature of machine-learned potentials for complex macroscopic properties of biphasic interfaces, and the mechanistic insight obtained into carbon dioxide aggregation at the water interface is of high relevance for geoscience, climate research, and materials science.
description: 14 pages, 10 figures
Livros e Publicações Periódicas
Creators: name: Costa, Mário Alberto Nunes
name: Cunha, Rosalina Silva
name: Pereira, Joaquim Tomaz Miguel
name: Portocarrero, António
name: Peixoto, Jorge
name: Calado, Adelino Almeida
Publisher: name: Cadernos BAD
Year: 2004

description: - ARCHIVUM, revue internationale des archives, publiée sous les auspices de l'UNESCO et du Conseil International des Archives (Paris), nº 11, 1961. - BIBLIOTECA NACIONAL. Panamá. - Encabezamientos de materia usados en la Biblioteca Nacional de Panama. - Panamá, o A., 1693 - 27.5 cm, /48/ fl., Policopiado. - BOLETIN DE LA DIRECCION GENERAL DE ARCHIVOS Y BIBLIOTWCAS; 11º ano, nº 68, Novembro-Dezembro, 1962. - BULLETIN DE L'UNESCO À L'INTENTION DES BIBLIOTHÈQUES; Vol. XVII, nº 2, Março/Abril 1963 - PUBLICAÇÕES DE CARÁCTER TÉCNICO - DE GULDEN PASSER, 40 Jaargang, 1962 - BULLETIN D'INFORMATION DE L'INSTITUT DE RECHERCHE ET D'HISTOIRE DES TEXTES, nº 11, 1962
description: Cadernos BAD, N.º 2 (1963)
Nuclear Superfluidity and Specific Heat in the Inner Crust of Neutron Stars
Creators: name: Sandulescu, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse the temperature dependence of pairing correlations in the inner crust matter of neutron stars. The study is done in a finite-temperature HFB approach and by using a zero range pairing force adjusted to the pairing properties of infinite neutron matter. Within the same approach we investigate how the specific heat of the inner crust depends on temperature, matter inhomogeneity, and the assumption used for the pairing force. It is shown that in a physical relevant range of densities the pairing properties of inner crust matter depend significantly on temperature. The finite-temperature HFB calculations show also that the specific heat is rather sensitive to the presence of nuclear clusters inside the inner crust. However, the most dramatic change of the specific heat is determined by the scenario used for the neutron matter superfluidity.
description: 5 pages, 5 figures
Aspisoma lineatum Gyllenhal 1817
Creators: name: Silveira, Luiz F L
name: Khattar, Gabriel
name: Vaz, Stephanie
name: Wilson, Vinicius A.
name: Souto, Paula M.
name: Mermudes, José R. M.
name: Stanger-Hall, Kathrin F.
name: Macedo, Margarete V.
name: Monteiro, Ricardo F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lampyridae
Aspisoma
Aspisoma lineatum

description: A. lineatum Gyllenhal, 1817 (Figure 4 B)
 Differential diagnosis. Elytron wider basally, then apically tapering, along with the dorsal colour pattern overall brown, except for the following, which are pale yellow: two anterolateral spots on the pronotum, the elytral outline and costae, a wide marginal stripe on elytron posterior half, and a humeral spot. Immature stages of A. lineatum have been described by Viviani et al. (2012).
description: Published as part of Silveira, Luiz F L, Khattar, Gabriel, Vaz, Stephanie, Wilson, Vinicius A., Souto, Paula M., Mermudes, José R. M., Stanger-Hall, Kathrin F., Macedo, Margarete V. & Monteiro, Ricardo F., 2020, Natural history of the fireflies of the Serra dos Órgãos mountain range (Brazil: Rio de Janeiro) - one of the ' hottest' firefly spots on Earth, with a key to genera (Coleoptera: Lampyridae), pp. 275-308 in Journal of Natural History 54 (5 - 6) on page 290, DOI: 10.1080/00222933.2020.1749323, http://zenodo.org/record/5021064
ATLAS vs. NextGen model atmospheres: a combined analysis of synthetic spectral energy distributions
Creators: name: Bertone, E.
name: Buzzoni, A.
name: Chavez, M.
name: Rodriguez-Merino, L. H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We carried out a critical appraisal of the two theoretical models, Kurucz' ATLAS9 and PHOENIX/NextGen, for stellar atmosphere synthesis. Our tests relied on the theoretical fit of SEDs for a sample of 334 target stars along the whole spectral-type sequence. The best-fitting physical parameters of stars allowed a calibration of the temperature and bolometric scale. The main conclusions of our analysis are: i) the fitting accuracy of both theoretical libraries drastically degrades at low Teff; ii) comparing with empirical calibrations, both ATLAS and NextGen fits tend to predict slightly warmer Teff, but ATLAS provides in general a sensibly better fit; iii) there is a striking tendency of NextGen to label target stars with an effective temperature and surface gravity in excess with respect to ATLAS. This is a consequence of some ``degeneracy'' in the solution space, partly induced by the different input physics and geometry constraints. A different T(τ) vertical structure of stellar atmosphere seems also required for NextGen synthetic SEDs in order to better account for limb-darkening effects in cool stars, as supported by the recent observations of the EROS BLG2000-5 microlensing event.
description: 18 pages, 14 figures; accepted for publication in the Astronomical Journal (scheduled for the August issue); see also http://www.bo.astro.it/~eps/home.html and http://www.inaoep.mx/~ebertone/
JUSTIFICATION OF THE NECESSITY OF KNOWLEDGE MANAGEMENT CONVERGENCE IN MULTINATIONAL PROJECTS
Creators: name: Sharovara Olena
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering

description: . Over the past decade, major projects typically involve professionals from all over the world, expanding the scope of competencies that a project manager must have. Multinational project teams and the creation of virtual project teams are the norm in a modern globalized economy. The transition from project management, in which the entire team is local, to the management of teams covering different time zones and nationalities becomes a new challenge. Globalization researcher K. Omaye considers that globalization is an irreversible process that deprives the traditional notions of national politics, trade, and citizenship. In this sense, in his opinion, the economic nationalism of individual states has now become meaningless. The formation of a single global meta-space (which is influenced by PESTLE factors) for free and effective business on an international scale becomes an urgent need. However, every single common global space based on the action of the principle of universality. A fundamental scientific problem arises – creation of an adequate model of convergent knowledge management in multinational projects, describing the process of scientific and innovative development of society at all its stages and levels. Considered from a rational and empirical approach what is important in the knowledge management is their functionalist perspective, because it allows to know about the rational world while integrates the disciplines and individuals as substantial components of multinational projects. There is a need to convert different intellectual resources into shared knowledge platform within a project to deliver better-customized services. Current efforts in managing knowledge have concentrated on producing; sharing and storing knowledge while projects require the combined use of these intellectual resources to enable organizations to provide innovative and customized services and deliver projects successfully. A review of the literature and research evaluations published by the researchers were made to justify the necessity of Knowledge Management Convergence in Multinational Projects. 
Myths and Truths Concerning Estimation of Power Spectra
Creators: name: Efstathiou, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is widely believed that maximum likelihood estimators must be used to provide optimal estimates of power spectra. Since such estimators require require of order N_d^3 operations they are computationally prohibitive for N_d greater than a few tens of thousands. Because of this, a large and inhomogeneous literature exists on approximate methods of power spectrum estimation. These range from manifestly sub-optimal, but computationally fast methods, to near optimal but computationally expensive methods. Furthermore, much of this literature concentrates on the power spectrum estimates rather than the equally important problem of deriving an accurate covariance matrix. In this paper, I consider the problem of estimating the power spectrum of cosmic microwave background (CMB) anisotropies from large data sets. Various analytic results on power spectrum estimators are derived, or collated from the literature, and tested against numerical simulations. An unbiased hybrid estimator is proposed that combines a maximum likelihood estimator at low multipoles and pseudo-C_\ell estimates at high multipoles. The hybrid estimator is computationally fast, nearly optimal over the full range of multipoles, and returns an accurate and nearly diagonal covariance matrix for realistic experimental configurations (provided certain conditions on the noise properties of the experiment are satisfied). It is argued that, in practice, computationally expensive methods that approximate the N_d^3 maximum likelihood solution are unlikely to improve on the hybrid estimator, and may actually perform worse. The results presented here can be generalised to CMB polarization and to power spectrum estimation using other types of data, such as galaxy clustering and weak gravitational lensing.
description: 27 pages, 15 figures, MNRAS in press. Resubmission matches accepted version
Cosmic rays cannot explain the high ionisation rates in the Galactic centre
Creators: name: Ravikularaman, Sruthiranjani
name: Recchia, Sarah
name: Phan, Vo Hong Minh
name: Gabici, Stefano
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The H$_2$ ionisation rate in the central molecular zone, located in the Galactic centre, is estimated to be $ζ\sim2\times10^{-14}~\mathrm{s}^{-1}$, based on observations of H$_3^+$ lines. This value is two to three orders of magnitude larger than that measured anywhere else in the Galaxy. Due to the high density of the gas in the central molecular zone, UV and X-ray photons do not penetrate this region. Hence, cosmic rays are expected to be the exclusive agents of ionisation. A high cosmic-ray density has been invoked to explain the unusually high ionisation rate. However, this excess is not seen in the $γ$-ray emission from this region, which is produced by high-energy cosmic rays. Therefore, an excess is expected only in the low-energy cosmic-ray spectrum. Here, we derive constraints on this hypothetical low-energy component in the cosmic-ray spectra, and we question its plausibility. To do so, we numerically solved the cosmic-ray transport equation in the central molecular zone. We derived stationary solutions under the assumption that cosmic rays are continuously injected by a source located in the Galactic centre. The high-energy component in the cosmic-ray spectrum was then fitted to available $γ$-ray and radio data, and a steep low-energy component was added to the cosmic-ray spectrum to explain the large ionisation rates. We find that injection spectra of $p^{-7}$ for protons below $p_\mathrm{enh,p}c\simeq780~\mathrm{MeV}$ and $p^{-5.2}$ for electrons below $p_\mathrm{enh,e}c=1.5~\mathrm{GeV}$ are needed to reach the observed ionisation rates. This corresponds to a cosmic-ray power of the order of $\sim10^{40-41}~\mathrm{erg}\,\mathrm{s}^{-1}$ injected at the Galactic centre. We conclude that cosmic rays alone cannot explain the high ionisation rates in the Galactic centre.
title: Child social relations and gender
Creators: name: Panter, David C
Publisher: name: The Open University
Year: 1989

description: This thesis reports six studies investigating the ways in which children experience themselves as gendered beings. The first two studies evaluate the theories of gender development proposed by exponents of both cognitive-developmental, and social learning theory, schools of thought. The results indicate that neither approach, with their emphasis on cognition at the exclusion of behaviour, or vice versa, provide sufficient explanation of the child-gender interface. In studies three and four, childrens' experience of gender is not located within their cognition or behaviour, but within their social relations. Thus in each of these studies children are exposed to controlled contextual changes, eg. sex of interacting partner or gender-appropriateness of toys given to play with, to investigate the strategies boys and girls use to maintain relationships between them. Results suggest that two relational strategies, person-centred and object-centred, are employed by the children, and that their use is related to gender. Furthermore, it is indicated that such strategies are affected by context, with some contexts affording the use of particular strategies. The fifth study provides four detailed case-studies, set against a major contextual change in childrens' social relations; the transition from nursery into full-time education. The material presented indicates that changes are brought about in the child's experience and practice of gender as a result of this transition. The final study of the thesis explores the child's own awareness of the transition they have been through and the changes this has wrought upon them. Thus the research presented in this thesis argues for a dynamic model of gender; one in which the child's experience of theirself as a gendered being is clearly located within their social relations
Perturbative stability and error correction thresholds of quantum codes
Creators: name: Li, Yaodong
name: O'Dea, Nicholas
name: Khemani, Vedika
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Topologically-ordered phases are stable to local perturbations, and topological quantum error-correcting codes enjoy thresholds to local errors. We connect the two notions of stability by constructing classical statistical mechanics models for decoding general CSS codes and classical linear codes. Our construction encodes correction success probabilities under uncorrelated bit-flip and phase-flip errors, and simultaneously describes a generalized Z2 lattice gauge theory with quenched disorder. We observe that the clean limit of the latter is precisely the discretized imaginary time path integral of the corresponding quantum code Hamiltonian when the errors are turned into a perturbative X or Z magnetic field. Motivated by error correction considerations, we define general order parameters for all such generalized Z2 lattice gauge theories, and show that they are generally lower bounded by success probabilities of error correction. For CSS codes satisfying the LDPC condition and with a sufficiently large code distance, we prove the existence of a low temperature ordered phase of the corresponding lattice gauge theories, particularly for those lacking Euclidean spatial locality and/or when there is a nonzero code rate. We further argue that these results provide evidence to stable phases in the corresponding perturbed quantum Hamiltonians, obtained in the limit of continuous imaginary time. To do so, we distinguish space- and time-like defects in the lattice gauge theory. A high free-energy cost of space-like defects corresponds to a successful "memory experiment" and suppresses the energy splitting among the ground states, while a high free-energy cost of time-like defects corresponds to a successful "stability experiment" and points to a nonzero gap to local excitations.
description: 17 pages + appendices. v2: updated references and acknowledgements. v3: made clarifications and fixed typos. published version
Stability and Dynamics of Crystals and Glasses of Motorized Particles
Creators: name: Shen, Tongye
name: Wolynes, Peter G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Many of the large structures of the cell, such as the cytoskeleton, are assembled and maintained far from equilibrium. We study the stabilities of various structures for a simple model of such a far-from-equilibrium organized assembly in which spherical particles move under the influence of attached motors. From the variational solutions of the manybody master equation for Brownian motion with motorized kicking we obtain a closed equation for the order parameter of localization. Thus we obtain the transition criterion for localization and stability limits for the crystalline phase and frozen amorphous structures of motorized particles. The theory also allows an estimate of nonequilibrium effective temperatures characterizing the response and fluctuations of motorized crystals and glasses.
description: 5 pages, 3 figures
Lock-free dynamic hash tables with open addressing
Creators: name: Gao, Hui
name: Groote, Jan Friso
name: Hesselink, Wim H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: D.1

description: We present an efficient lock-free algorithm for parallel accessible hash tables with open addressing, which promises more robust performance and reliability than conventional lock-based implementations. ``Lock-free'' means that it is guaranteed that always at least one process completes its operation within a bounded number of steps. For a single processor architecture our solution is as efficient as sequential hash tables. On a multiprocessor architecture this is also the case when all processors have comparable speeds. The algorithm allows processors that have widely different speeds or come to a halt. It can easily be implemented using C-like languages and requires on average only constant time for insertion, deletion or accessing of elements. The algorithm allows the hash tables to grow and shrink when needed. Lock-free algorithms are hard to design correctly, even when apparently straightforward. Ensuring the correctness of the design at the earliest possible stage is a major challenge in any responsible system development. In view of the complexity of the algorithm, we turned to the interactive theorem prover PVS for mechanical support. We employ standard deductive verification techniques to prove around 200 invariance properties of our algorithm, and describe how this is achieved with the theorem prover PVS.
Structures and Actors of the Organic Vegetable Value Chain for School Catering: a Case Study of the Berlin-Brandenburg Metropolitan Region
Creators: name: Braun, Charis Linda
name: Rombach, Meike
name: Bitsch, Vera
name: Häring, Anna Maria
name: Braun, Charis Linda
name: Rombach, Meike
name: Bitsch, Vera
name: Häring, Anna Maria
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: value chain; organic vegetables; school catering; structuration theory

description: With the European Union’s move towards “green public procurement”, there is an opportunity to bring more local organic produce into school catering. The present study investigates the value chain supplying school catering with organic produce, using the organic vegetable industry in the Berlin-Brandenburg region as an example. It employs a qualitative case study approach to explore industry actors’ perspectives and their activities within the value chain. Data is collected by conducting ten in-depth interviews with actors on different supply chain levels (production, wholesale, and school catering) and is analyzed using qualitative content analysis. The results suggest that, while organic food is generally important in school catering in Berlin, locally produced organic vegetables play only a minor role. Inter-organizational coordination of value-added activities could help to further utilize the potential for local organic vegetable production and enable joint investments into lacking infrastructure such as pre-processing facilities.
UBC Students’ Attitudes Toward Climate Change Since the Onset of the COVID-19 Pandemic
Creators: name: Soriano, Jacey
name: Seo, Jenny
name: Okazaki, Troy
name: Bulut, Ece
name: Deo, Akash
Publisher: name: The University of British Columbia
Year: 2021

description: Since the rise of COVID-19, climate change awareness may have shifted due to stay-at-home restrictions and less contact with the outdoor world. Therefore, the research question that we chose to study was “How has the increase in the amount of time spent indoors impacted the attitudes of UBC students toward climate change?” We hypothesized that students who spent more time outdoors, would show more concern for climate change. We conducted a survey in which we asked questions based on three categories: beliefs, risk perceptions, and policy support. From the 103 participants we were able to collect our data from, we found that the amount of time spent indoors or outdoors did not have an impact on attitudes towards climate change, thus not supporting our hypothesis. A negative correlation of marginal significance was found between time spent outdoors and the level of concern of climate change. We found that more opportunity for contact with nature may not be correlated with a greater concern for climate change. 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.”