cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Preservação digital a longo prazo: boas práticas e estratégias
Creators: name: Saramago, Maria Lurdes
Publisher: name: Cadernos BAD
Year: 2003

description: Abordam-se as diversas fases do ciclo de vida dos recursos digitais na perspectiva da sua preservação a longo prazo. São enunciadas as práticas e as diversas metodologias tidas actualmente como as mais adequadas para se obviar à fragilidade física dos suportes e à vulnerabilidade do meio digital, assim como à minimização das perdas inerentes à preservação de recursos nos mais diversos meios e formatos.São focados os aspectos tecnicamente mais interessantes e inovadores do ponto de vista da utilização de metadados e a sua relação com as diversas estratégias implementáveis, nomeadamente a emulação, a migração, a encapsulação, a aplicação do Virtual Machine Software e o XML. São ainda referidas as boas práticas quanto a metadados de preservação.Focam-se diferentes opções nacionais quanto à selecção de recursos e posterior acesso nas suas incidências sobre direitos de autor.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
Dirac monopoles and dipoles in ferromagnetic spinor Bose-Einstein condensates
Creators: name: Savage, C. M.
name: Ruostekoski, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a radial spin hedgehog, analogous to the Dirac monopole, in an optically trapped atomic spin-1 Bose-Einstein condensate. By joining together a monopole-antimonopole pair, we may form a vortex line with free ends. We numerically simulate the three-dimensional dynamics and imaginary time relaxation of these structures to nonsingular textures and show they can be observable for realistic experimental parameters.
description: 6 pages, 5 figures
Preservação de publicações electrónicas na Internet: os arquivos imperfeitos
Creators: name: Faria, Pedro Lopes
name: Cardoso, Gustavo
name: Moreira, Maria Vasconcelos
Publisher: name: Cadernos BAD
Year: 2003

description: Cada vez mais informação é gerada num contexto digital, introduzindo uma revolução em conceitos tão familiares como documentos e publicações. Esta informação é um recurso valioso e deve ser preservada para as gerações presentes e futuras.Para a preservação nacional de informação nado-digital deve estudar-se se a aproximação deve ser selectiva, escolhendo o conteúdo a preservar de acordo com critérios previamente definidos, ou exaustiva, recolhendo o universo nacional de sites na Web e guardando todos os documentos encontrados.Vários exemplos são apresentados, representativos das duas aproximações, e as suas implicações são discutidas.A preservação de documentos dinâmicos é também discutida pela sua particular relevância relativamente a jornais e publicações online e pela especificidade dos desafios tecnológicos envolvidos.São apresentadas algumas recomendações para que a Biblioteca Nacional concretize a preservação de documentos e publicações nado-digital, nomeadamente: considerar a aproximação de uma recolha exaustiva de documentos estáticos, criando uma série de fotografias do universo nacional (domínio “.pt”) de documentos publicados na Web; considerar a viabilidade do depósito voluntário, selectivo, baseado em acordos directos a ser desenvolvido/ensaiado com os editores dos principais jornais online.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
Digital preservation initiatives in the United States: a summary
Creators: name: Marcum, Deanna
Publisher: name: Cadernos BAD
Year: 2003

description: General presentation on how digital preservation issues are being faced in the United States of America. Special reference to the National Digital Information Infrastructure and Preservation Program, that is found at the Library of Congress, and aims to implement a national strategy for the long-term preservation of digital content.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
Convective Depletion During The Fast Propagation Of A Nanosphere Through A Polymer Solution
Creators: name: Odijk, Theo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A theory of nonlinear convective depletion is set up as a nanosphere translates fast through a semidilute polymer solution. For nanospheres a self-consistent field theory in the Rouse approximation is often legitimate. A self-similar solution of the convective depletion equation is argued to be feasible at high velocities. The nature of the thin boundary layer in front of the propagating particle is analyzed. One example of convective depletion is when a charged protein moves through a semidilute polymer under the influence of a high electric field. The protein velocity is then proportional to the fifth power of the field. The theory could be useful in interpreting the separation of protein mixtures by microchip electrophoresis.
description: 12 pages, 2 figures
On identities concerning integer parts
Creators: name: Wang, Zichang
name: Wu, Chengyang
name: Yang, Bohan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11K36

description: In 2007 V. Zhuravlev discovered a family of identities concerning integer parts which are satisfied by the number $\frac{\sqrt{5}+1}{2}$. Some of these identities turned out to be characterization properties of the number $\frac{\sqrt{5}+1}{2}$. In this paper we generalize the simplest of these identities.
description: Final version to appear in Combinatorics and Number Theory
The N=1* Theories on R^{1+2} X S^1 with Twisted Boundary Conditions
Creators: name: Kim, Seok
name: Lee, Ki-Myeong
name: Yee, Ho-Ung
name: Yi, Piljin
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the N=1* theories compactified on a circle with twisted boundary conditions. The gauge algebra of these theories are the so-called twisted affine Lie algebra. We propose the exact superpotentials by guessing the sum of all monopole-instanton contributions and also by requiring SL(2,Z) modular properties. The latter is inherited from the N=4 theory, which will be justified in the M theory setting. Interestingly all twisted theories possess full SL(2,Z) invariance, even though none of them are simply-laced. We further notice that these superpotentials are associated with certain integrable models widely known as elliptic Calogero-Moser models. Finally, we argue that the glueball superpotential must be independent of the compactification radius, and thus of the twisting, and confirm this by expanding it in terms of glueball superfield in weak coupling expansion.
description: LaTeX, 62 pages, 3 figures, v2: reference and typos corrected, v3: acknowledgement added, JHEP accepted
Fully automated identification of 2D material samples
Creators: name: Greplova, Eliska
name: Gold, Carolin
name: Kratochwil, Benedikt
name: Davatz, Tim
name: Pisoni, Riccardo
name: Kurzmann, Annika
name: Rickhaus, Peter
name: Fischer, Mark H.
name: Ihn, Thomas
name: Huber, Sebastian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Thin nanomaterials are key constituents of modern quantum technologies and materials research. Identifying specimens of these materials with properties required for the development of state of the art quantum devices is usually a complex and lengthy human task. In this work we provide a neural-network driven solution that allows for accurate and efficient scanning, data-processing and sample identification of experimentally relevant two-dimensional materials. We show how to approach classification of imperfect imbalanced data sets using an iterative application of multiple noisy neural networks. We embed the trained classifier into a comprehensive solution for end-to-end automatized data processing and sample identification.
description: 8 pages, 4 figures
Data-driven stochastic optimization approaches to determine decision thresholds for risk estimation models
Creators: name: Gian-Gabriel P. Garcia
name: Lavieri, Mariel S.
name: Ruiwei Jiang
name: McCrea, Michael A.
name: McAllister, Thomas W.
name: Broglio, Steven P.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Computational Biology

description: The increasing availability of data has popularized risk estimation models in many industries, especially healthcare. However, properly utilizing these models for accurate diagnosis decisions remains challenging. Our research aims to determine when a risk estimation model provides sufficient evidence to make a positive or negative diagnosis, or if the model is inconclusive. We formulate the Two-Threshold Problem (TTP) as a stochastic program which maximizes sensitivity and specificity while constraining false-positive and false-negative rates. We characterize the optimal solutions to TTP as either two-threshold or one-threshold and show that its optimal solution can be derived from a related linear program (TTP*). We also derive utility-based and multi-class classification frameworks for which our analytical results apply. We solve TTP* using data-driven methods: quantile estimation (TTP*-Q) and distributionally robust optimization (TTP*-DR). Through simulation, we characterize the feasibility, optimality, and computational burden of TTP*-Q and TTP*-DR and compare TTP*-Q to an optimized single threshold. Finally, we apply TTP* to concussion assessment data and find that it achieves greater accuracy at lower misclassification rates compared with traditional approaches. This data-driven framework can provide valuable decision support to clinicians by identifying “easy” cases which can be diagnosed immediately and “hard” cases which may require further evaluation before diagnosing.
Gallium concentration dependence of room-temperature near-bandedge luminescence in n-type ZnO:Ga
Creators: name: Makino, T.
name: Segawa, Y.
name: Yoshida, S.
name: Tsukazaki, A.
name: Ohtomo, A.
name: Kawasaki, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the optical properties of epitaxial \textit{n}-type ZnO films grown on lattice-matched ScAlMgO$_4$ substrates. As the Ga doping concentration increased up to $6 \times 10^{20}$ cm$^{-3}$, the absorption edge showed a systematic blueshift, consistent with the Burstein-Moss effect. A bright near-bandedge photoluminescence (PL) could be observed even at room temperature, the intensity of which increased monotonically as the doping concentration was increased except for the highest doping level. It indicates that nonradiative transitions dominate at a low doping density. Both a Stokes shift and broadening in the PL band are monotonically increasing functions of donor concentration, which was explained in terms of potential fluctuations caused by the random distribution of donor impurities.
description: accepted for publication for Applied Physics Letters 4 figures
Semi-supervised voice conversion with amortized variational inference
Creators: name: Stephenson, Cory
name: Keskin, Gokce
name: Thomas, Anil
name: Elibol, Oguz H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this work we introduce a semi-supervised approach to the voice conversion problem, in which speech from a source speaker is converted into speech of a target speaker. The proposed method makes use of both parallel and non-parallel utterances from the source and target simultaneously during training. This approach can be used to extend existing parallel data voice conversion systems such that they can be trained with semi-supervision. We show that incorporating semi-supervision improves the voice conversion performance compared to fully supervised training when the number of parallel utterances is limited as in many practical applications. Additionally, we find that increasing the number non-parallel utterances used in training continues to improve performance when the amount of parallel training data is held constant.
description: Accepted for publication at Interspeech 2019
Emergence of complex structures from nonlinear interactions and noise in coevolving networks
Creators: name: Raducha, Tomasz
name: Miguel, Maxi San
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We study the joint effect of the non-linearity of interactions and noise on coevolutionary dynamics. We choose the coevolving voter model as a prototype framework for this problem. By numerical simulations and analytical approximations we find three main phases that differ in the absolute magnetization and the size of the largest component: a consensus phase, a coexistence phase, and a dynamical fragmentation phase. More detailed analysis reveals inner differences in these phases, allowing us to divide two of them further. In the consensus phase we can distinguish between a weak or alternating consensus (switching between two opposite consensus states), and a strong consensus, in which the system remains in the same state for the whole realization of the stochastic dynamics. Additionally, weak and strong consensus phases scale differently with the system size. The strong consensus phase exists for superlinear interactions and it is the only consensus phase that survives in the thermodynamic limit. In the coexistence phase we distinguish a fully-mixing phase (both states well mixed in the network) and a structured coexistence phase, where the number of links connecting nodes in different states (active links) drops significantly due to the formation of two homogeneous communities of opposite states connected by a few links. The structured coexistence phase is an example of emergence of community structure from not exclusively topological dynamics, but coevolution. Our numerical observations are supported by an analytical description using a pair approximation approach and an ad-hoc calculation for the transition between the coexistence and dynamical fragmentation phases. Our work shows how simple interaction rules including the joint effect of non-linearity, noise, and coevolution lead to complex structures relevant in the description of social systems.
Digital heritage for the future
Creators: name: Lusenet, Yola
Publisher: name: Cadernos BAD
Year: 2003

description: This paper provides an overview of various issues related to digital preservation: the nature of digital information, the roles and responsibilities of institutions, selection of materials and choices in preservation, with many references to current initiatives. It argues that traditional concepts like publication and record have to be redefined in the digital world, in order to develop effective preservation policies. Preservation has become a matter of keeping access rather than keeping objects, for which the first requirement is defining the digital object and its essential characteristics. Documentation has moved to the centre of preservation activities, which now have to take place quite early in the lifecycle of materials.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
Relaxation of particle-hole type excitation in a Fermi system within the diffusion approximation of kinetic theory for the case of constant diffusion and drift coefficients
Creators: name: Lukyanov, Sergiy V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The time evolution of the distribution function for a particle-hole excitation in a Fermi system was calculated using the direct numerical solution of a nonlinear diffusion equation in momentum space. A phenomenological expression for calculating the relaxation time of such an excitation to its equilibrium value has been proposed. It is shown that the relaxation time is dependent on both the excitation energy and the mass number.
description: 15 pages, 5 figures
Excitation spectrum of Bilayer $ν=2$ Quantum Hall Systems
Creators: name: Shimoda, Yuichi
name: Nakajima, Tatsuya
name: Sawada, Anju
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Excitation spectra in bilayer quantum Hall systems at total Landau-level filling $ν=2$ are studied by the Hartree-Fock-Bogoliubov approximation. The systems have the spin degrees of freedom in addition to the layer degrees of freedom described in terms of pseudospin. On the excitation spectra from spin-unpolarized and pseudospin-polarized ground state, this approximation fully preserves the spin rotational symmetry and thus can give not only spin-triplet but also spin-singlet excitations systematically. It is also found that the ground-state properties are well described by this approximation.
description: 5 pages, 3 figures; conference: EP2DS-15
East Mall Redesign
Creators: name: Hsu, Francis
name: Isaac, Lane
name: Keefe, Ryan
name: Rea, Joshua
name: Sun, Steve
name: Zenke, Evan
Publisher: name: The University of British Columbia
Year: 2021

description: A comprehensive, detailed design has been prepared for review in response to the University of British Columbia’s request for a complete redesign of the East Mall corridor. The section of East Mall under consideration is located between West 16th Avenue and Agronomy Road on the south side of campus. With guidance from the client, UBC SEEDS, the detailed design looks to revamp the corridor into a new and effective design with sustainability and functionality as core design principles. Furthering the concept of sustainability, a holistic approach of incorporating a bioswale, recycled road material, and environmental planning is used. To address the functionality and concerns raised by UBC SEEDS, designers incorporated the use of road geometry, traffic calming, bus stops, drop-off zones, traffic analysis, pavement, signage, and canopy designs. Through these design elements, designers look to promote sustainable modes of traffic such as foot traffic, public transit, and cycling by making the corridor more livable for users. To ensure that the detailed design is logistically feasible, designers considered the impact on the community, the environmental management, maintenance over the life cycle, construction methodology/schedule, and cost. The ultimate result of the detailed design is a construction start date of May 1st, 2021 and a completion date of October 6th, 2021, which will be broken down into different construction phases. The project's total estimated cost is expected to be $9,102,000+tax, which includes all design and support costs. The design team is excited to present the detailed design of the East Mall redesign project. It is with the utmost pride to have been selected and afforded the opportunity to contribute to the University of British Columbia’s community. The team looks forward to assisting with the project as it moves towards the construction phase to ensure this project comes to fruition. 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.”
Editorial
Creators: name: Henriques, Cecília
Publisher: name: Cadernos BAD
Year: 2003

description: O tema da preservação digital – leia-se, preservação de informação em formato digital – tem vindo, nos últimos anos, a ser objecto de preocupação crescente na comunidade internacional de profissionais de informação, revelando-se um campo privilegiado para a cooperação entre diferentes áreas disciplinares, sectores de actividade, instituições, países.Iniciativas como a ECPA – European Commission on Preservation and Access (www.knaw.nl/ecpa), o projecto InterPARES – International research on Permanent Authentic Records in Electronic Systems (www.interpares.org) ou o projecto ERPANET – Electronic Resource Preservation and Access Network (www.erpanet.org) são apenas alguns exemplos entre muitos outros do dinamismo que envolve o tema, nomeadamente, no contexto europeu.Em Portugal estamos ainda, quando muito, numa fase de sensibilização para o problema. Das instâncias governamentais aos organismos de coordenação sectorial, das instituições de ensino aos centros de investigação, dos fornecedores do mercado das tecnologias aos profissionais de informação, todos se mantêm entre o alheado e o timidamente envolvido no reconhecimento do problema, na definição de estratégias e na apresentação de soluções.Neste contexto, o Encontro sobre Preservação Digital que decorreu em Lisboa, em Novembro de 2002, organizado conjuntamente pela Biblioteca Nacional e pela ECPA, foi visto pela BAD como particularmente significativo, razão por que se associou à iniciativa através da publicação, na primeira parte do presente número dos Cadernos BAD, de algumas das comunicações apresentadas.Espero que este registo, ainda que parcial, ao facilitar um mais alargado e permanente acesso à informação que aí foi trocada, seja um contributo útil para estimular o necessário crescente envolvimento dos profissionais de informação nesta problemática.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
title: Buber's perception of Judaism. Its character and development.
Creators: name: Phillipson, G. B.
Publisher: name: The Open University
Year: 1990

description: The thesis enquires into Buber's concept of Judaism and his self- understanding as a Jew. Scholars in the field have been concerned with many aspects of Buber's dialogical philosophy but except for articles written from the point of view of Jewish orthodoxy, no in- depth work has been produced specifically examining the nature of his Judaism. The thesis draws out neglected and misunderstood aspects of Buber's thought and aims to conclude that his understanding of religious experience and life is profoundly Jewish. That is to say, his perception of what is essential to Judaism and to Jewish religious experience and life draws on the same (traditional) sources as orthodoxy and maintains Buber within a specific Jewish continuum. Consequently while the influences on Buber's developing thought are carefully examined the emphasis of the argument is on Buber's understanding of God and revelation, and of the nature of man's responsibility. These are considered after an examination of the I- Thou/I-It word-pairs which represent the attitudes associated with Buber's dialogical philosophy. The problems concerning Buber's belief that law cannot be a part, of the content of revelation, and the subsequent issue of his non-observation of mitzvot, are dealt with in depth. A parallel emphasis is given to Buber's involvement with Zionism, his work for Jewish communities in Germany before and during Hitler, and his continual work for Arab-Jewish rapprochement both in Palestine and after the establishment of the Israeli state. It is by an analysis of the inextricable relationship between Buber's thought and practical work that the argument of the thesis establishes the reasons why Buber's self-perception is valid in terms of Jewish religious belief and life .
Emulators for stellar profiles in binary population modeling
Creators: name: Teng, Elizabeth
name: Demir, Ugur
name: Doctor, Zoheyr
name: Srivastava, Philipp M.
name: Lalvani, Shamal
name: Kalogera, Vicky
name: Katsaggelos, Aggelos
name: Andrews, Jeff J.
name: Bavera, Simone S.
name: Briel, Max M.
name: Gossage, Seth
name: Kovlakas, Konstantinos
name: Kruckow, Matthias U.
name: Rocha, Kyle Akira
name: Sun, Meng
name: Xing, Zepei
name: Zapartas, Emmanouil
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Knowledge about the internal physical structure of stars is crucial to understanding their evolution. The novel binary population synthesis code POSYDON includes a module for interpolating the stellar and binary properties of any system at the end of binary MESA evolution based on a pre-computed set of models. In this work, we present a new emulation method for predicting stellar profiles, i.e., the internal stellar structure along the radial axis, using machine learning techniques. We use principal component analysis for dimensionality reduction and fully-connected feed-forward neural networks for making predictions. We find accuracy to be comparable to that of nearest neighbor approximation, with a strong advantage in terms of memory and storage efficiency. By providing a versatile framework for modeling stellar internal structure, the emulation method presented here will enable faster simulations of higher physical fidelity, offering a foundation for a wide range of large-scale population studies of stellar and binary evolution.
description: 12 pages, 10 figures. Accepted for publication by Astronomy and Computing
Informação digital: um novo património a preservar
Creators: name: Campos, Fernanda Maria
Publisher: name: Cadernos BAD
Year: 2003

description: A informação digital, nas suas várias formas, constitui já uma significativa parte do nosso património cultural e intelectual, com importantes benefícios para os utilizadores. As organizações com responsabilidades na preservação e acessibilização destes recursos têm que desenvolver um conjunto de estratégias que garantam a sua preservação a longo prazo, preferencialmente em estreita colaboração entre si (bibliotecas e arquivos) e com os produtores/editores de informação digital. Pretende-se aqui demonstrar a razoabilidade da preservação digital e o papel que incumbe às diferentes partes interessadas. Por último, é feita uma referência ao Encontro sobre Preservação Digital organizado conjuntamente pela Biblioteca Nacional e pela ECPA – European Comission on Preservation and Access, bem como à missão e papel da ECPA na promoção de iniciativas relacionadas com a preservação e acesso ao património cultural.
description: Cadernos BAD, N.º 2 (2002): Preservação digital: experiências e estratégias
Irrationalité de valeurs de zêta (d'après Apéry, Rivoal, ...)
Creators: name: Fischler, Stéphane
Publisher: name: arXiv
Year: 2003
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11J72 (Primary) 11G55, 11M06, 33C20, 41A21 (Secondary)

description: This survey text deals with irrationality, and linear independence over the rationals, of values at positive odd integers of Riemann zeta function. The first section gives all known proofs (and connections between them) of Apéry's Theorem (1978) : $ζ(3)$ is irrational. The second section is devoted to a variant of the proof, published by Rivoal and Ball-Rivoal, that infinitely many $ζ(2n+1)$ are irrational. The end of this text deals with more quantitative statements.
description: Bourbaki Seminar, November 2002 ; to appear in Ast\'erisque ; 45 pages ; in french
UBC East Mall Redesign Detailed Design Report
Creators: name: Jin, Yubo
name: Lyu, Lingjin
name: Qiu, Yufeng
name: Wang, Liang
name: Wu, Haolun
name: Ye, Simin
Publisher: name: The University of British Columbia
Year: 2021

description: Per requested by UBC SEEDS Sustainability Program, a redesign on the East Mall segment between Agronomy Road and W 16th Avenue is prompted to achieve two goals: 1) Address current traffic issues such as speeding, lack of safety for pedestrians and cyclists, insufficient supply of temporary parking, etc.; 2) Improve the surrounding area with betterment such as tie-in with the Thunderbird Stadium Neighborhood, weather protection at Agronomy Road, greenspace increment and etc. The final detailed design is developed based on the preliminary design, with new features added. The final report includes design key components, design criteria, construction and maintenance plan, detailed cost estimate, construction schedule as well as the IFC drawings package and construction specification. Different modelling softwares such as Excel, AutoCAD and Synchro were applied to visualize the design components and analyze the design outcome. An updated class-B cost estimate is conducted, with the total of 14 main tasks defined in the detailed stage broken down into 35 subtasks. The project is estimated to be $11,432,982 CAD. The estimated cost covers permitting fee, construction cost, direct operation cost and maintenance cost. Based on estimated project schedule, actual construction will start on May 1st, 2021, and will attain substantial completion by Aug 22nd, 2021. 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.”
Closed manifolds coming from Artinian complete intersections
Creators: name: Papadima, Ştefan
name: Păunescu, Laurenţiu
Publisher: name: arXiv
Year: 2004
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57R65;13C40;11E81;58K20 58K20 58K20

description: We reformulate the integrality property of the Poincaré inner product in the middle dimension, for an arbitrary Poincaré $\Q$-algebra, in classical terms (discriminant and local invariants). When the algebra is 1-connected, we show that this property is the only obstruction to realizing it by a closed manifold, up to dimension 11. We reinterpret a result of Eisenbud and Levine on finite map germs, relating the degree of the map germ to the signature of the associated local ring, to answer a question of Halperin on artinian weighted complete intersections.We analyse the homogeneous artinian complete intersections over $\Q$ realized by closed manifolds of dimensions 4 and 8, and their signatures.
description: 13 pages
Exports and governance: the role of private voluntary standards
Creators: name: Fiankor, Dela-Dem Doe
name: Martinez-Zarzoso, Inmaculada
name: Brümmer, Bernhard
name: Fiankor, Dela-Dem Doe
name: Martinez-Zarzoso, Inmaculada
name: Brümmer, Bernhard
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: International Development
subject: International Relations/Trade
subject: Agricultural trade
subject: GlobalGAP
subject: Private food standards
subject: Gravity model
subject: Institutional quality

description: The empirical evidence that institutional diﬀerences across countries aﬀect bilateral trade is robust. The crucial question remains how countries can enhance trade amid these differences. In this paper, we measure the degree to which governance and institutions diﬀer between countries as “governance distance”. Using a sample of EU/EFTA imports, we examine how the adoption of private food standards and certiﬁcations modify the eﬀect of governance distance on exports within a structural gravity framework. Our results show that while increasing governance distance hinders bilateral trade, the interaction of standards and the governance distance is positively associated with exports, hence partially oﬀsetting their direct trade–inhibiting eﬀects. GlobalGAP certiﬁed countries see the trade-inhibiting eﬀects of governance distance on their exports reduced by about 50%, ceteris paribus.
Engineers Code: reusable open learning modules for engineering computations
Creators: name: Barba, Lorena A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Undergraduate programs in science and engineering include at least one course in basic programming, but seldom presented in a contextualized format, where computing is a tool for thinking and learning in the discipline. We have created a series of learning modules to embed computing in engineering education, and share this content under permissive public licenses. The modules are created as a set of lessons using Jupyter notebooks, and complemented by online courses in the Open edX platform, using new integrations we developed. Learning sequences in the online course pull content dynamically from public Jupyter notebooks and assessments are auto-graded on-the-fly, using our Jupyter Viewer and Jupyter Grader third-party extensions for Open edX (XBlocks). The learning content is modularized and designed for reuse in various formats. In one of these formats---short but intense workshops---our university library is leveraging the curriculum to offer extra-curricular training for all, at high demands.
description: 7 pages, 1 figure
Leituras
Creators: name: Penteado, Pedro
name: Ramalho, Alfredo Magalhães
name: Oliveira, Vera Moniz
Publisher: name: Cadernos BAD
Year: 2003

description: CHOO, Chun Wei – Gestão da informação para a organização inteligente. A arte de explorar o meio ambiente. Lisboa: Caminho, 2003. ETHICS AND ELECTRONIC INFORMATION : an homage to Stephen Almagno Organizado por Barbara Rockenbach e Tom Mendina. Jefferson (North Carolina, EUA) : McFarlands & Company, 2003 VENTURA, João J. B. (2002) – Bibliotecas e esfera pública. Oeiras: Celta.
description: Cadernos BAD, N.º 2 (2003): Informação, documentação e conhecimento
Non-unitarity maximizing unraveling of open quantum dynamics
Creators: name: Daraban, Ruben
name: Salas-Ramírez, Fabrizio
name: Schachenmayer, Johannes
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dynamics of many-body quantum states in open systems is commonly numerically simulated by unraveling the density matrix into pure-state trajectories. In this work, we introduce a new unraveling strategy that can adaptively minimize the averaged entanglement in the trajectory states. This enables a more efficient classical representation of trajectories using matrix product decompositions. Our new approach is denoted non-unitarity maximizing unraveling (NUMU). It relies on the idea that adaptively maximizing the averaged non-unitarity of a set of Kraus operators leads to a more efficient trajectory entanglement destruction. Compared to other adaptive entanglement lowering algorithms, NUMU is computationally inexpensive. We demonstrate its utility in large-scale simulations with random quantum circuits. NUMU lowers runtimes in practical calculations, and it also provides new insight on the question of classical simulability of quantum dynamics. We show that for the quantum circuits considered here, unraveling methods are much less efficient than full matrix product density operator simulations, hinting to a still large potential for finding more advanced adaptive unraveling schemes.
description: 24+10 pages, 12 figures, LaTeX; includes minor improvements, typo corrections, and additional references
Normalizar a descrição em arquivo: questionar, reflectir e aplicar
Creators: name: Runa, Lucília
name: Braga, Joana
Publisher: name: Cadernos BAD
Year: 2003

description: Pretende-se, neste artigo, analisar a questão da normalização da descrição em arquivo, no que diz respeito à documentação, aos seus produtores e aos instrumentos de descrição, com base nas normas internacionais do Conselho Internacional de Arquivos, a ISAD(G), a ISAAR(CPF) e as Guidelines for the preparation and presentation of finding aids. É feita uma reflexão sobre a sua aplicabilidade à realidade portuguesa e um levantamento dos principais desafios, dificuldades e resistências.
description: Cadernos BAD, N.º 2 (2003): Informação, documentação e conhecimento
Velhas questões, novas tecnologias. As bibliotecas públicas face à sociedade da informação
Creators: name: Vieira, João Luciano
Publisher: name: Cadernos BAD
Year: 2003

description: O desenvolvimento de novas tecnologias de informação e comunicação tem reflexos no âmbito da biblioteconomia. As bibliotecas públicas têm em geral procurado incorporar novos serviços, prestados com recurso às referidas tecnologias, complementando os serviços tradicionalmente prestados. Este artigo discute as implicações destas tecnologias ao nível da concepção de biblioteca pública, discutindo novas formas de iliteracia. Discute-se, ainda, as concepções de portal e as suas implicações na relação da biblioteca pública com a sua comunidade.
description: Cadernos BAD, N.º 2 (2003): Informação, documentação e conhecimento
On the taxing of migrants’ earnings while retaining a migrant workforce
Creators: name: Stark, Oded
name: Budzinski, Wiktor
name: Stark, Oded
name: Budzinski, Wiktor
Publisher: name: Unknown
Year: 2018
Subjects: subject: Labor and Human Capital
subject: Research Methods/ Statistical Methods
subject: Migration
subject: Taxing migrants
subject: Target migrants
subject: Non-target migrants

description: We study policies that are aimed at retaining a migrant workforce in a Gulf State while introducing a tax on migrant earnings. We single out Qatar as a case study. We consider two types of migrants: target migrants, and non-target migrants. If migrants are target migrants, we show that in order to neutralize the effect of a tax on their earnings, Qatar needs to extend the length of time migrants are allowed to stay. Such a scheme can work even when the migrants experience utility loss from staying longer in Qatar. If migrants are non-target migrants, we show that implementation of a lottery scheme in which the prizes are life-long residency in Qatar can “compensate” for the imposition of the tax. In both cases, we present numerical examples that illustrate the magnitudes involved.
A alma e a consciência do arquivista: reflexões sobre o poder, a paixão e o positivismo de uma profissão missionária
Creators: name: Cunningham, Adrian
Publisher: name: Cadernos BAD
Year: 2003

description: Este artigo reflecte sobre a natureza e objectivos do trabalho arquivístico e as formas pelas quais é realizado, conjugando conceitos contraditórios de objectividade científica, positivismo, subjectividade, humanismo, desprendimento profissional e empenho missionário. É abordada a tensão existente entre os códigos de ética profissionais e os valores individuais, defendendo-se a necessidade de os arquivistas questionarem as supostas certezas científicas e profissionais, particularmente quando estas entram em conflito com imperativos de natureza humana, social e cultural.
description: Cadernos BAD, N.º 2 (2003): Informação, documentação e conhecimento
Of Bulls and Bulbs: Aspirations and perceptions of rural youth in Zambia
Creators: name: Daum, Thomas
name: Daum, Thomas
Publisher: name: Unknown
Year: 2018
Subjects: subject: Environmental Economics and Policy
subject: Institutional and Behavioral Economics
subject: Research and Development/Tech Change/Emerging Technologies
subject: Resource /Energy Economics and Policy
subject: Aspirations
subject: rural youth
subject: evidence-based policy making
subject: youth bulge
subject: rural-urbanmigration
subject: agricultural development

description: During the last years, policymakers and development-practitioners focused heavily on making farming more attractive for the rural youth in Africa. To reach this goal, different actions are proposed, often emphasizing the need for modern farming and information and communication technologies. These proposed actions are mostly based on anecdotes and prior policy beliefs, but not on empirical evidence since scientists have largely neglected this topic. This paper aims to contribute to a deeper understanding of the aspirations and perceptions of young people and therefore to the formulation of policy actions that fit these aspirations. Two research methods were used to explore the aspirations and perceptions of rural youth: interviews and drawing exercises, a novel method in this context that allows for both a qualification and quantification of aspirations. The results show that rural youth have very diverse opinions and aspirations. In contrast to the literature, young people were found to reflect carefully about the positive and negative sides of farming, rural and urban life, and of foreign countries. Imagining their future farm, young people mostly envisioned using draught animals and having electricity (which explaining the reference to bulls and bulbs in the title of this paper). In addition, the young people aspired to greater farm diversity and applying more fertilizer. Few respondents mentioned the use of modern technologies such as tractors, and none mentioned ICTs. While it is difficult to generalize our results, the findings suggest that policymakers and development-practitioners need to pay more attention to the actual aspirations of the rural youth to avoid well-intended but misguided policies.
Polynomial-time computing over quadratic maps I: sampling in real algebraic sets
Creators: name: Grigoriev, Dima
name: Pasechnik, Dmitrii V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Symbolic Computation (cs.SC)
subject: Computational Geometry (cs.CG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: I.1.2; G.1.5

description: Given a quadratic map Q : K^n -> K^k defined over a computable subring D of a real closed field K, and a polynomial p(Y_1,...,Y_k) of degree d, we consider the zero set Z=Z(p(Q(X)),K^n) of the polynomial p(Q(X_1,...,X_n)). We present a procedure that computes, in (dn)^O(k) arithmetic operations in D, a set S of (real univariate representations of) sampling points in K^n that intersects nontrivially each connected component of Z. As soon as k=o(n), this is faster than the standard methods that all have exponential dependence on n in the complexity. In particular, our procedure is polynomial-time for constant k. In contrast, the best previously known procedure (due to A.Barvinok) is only capable of deciding in n^O(k^2) operations the nonemptiness (rather than constructing sampling points) of the set Z in the case of p(Y)=sum_i Y_i^2 and homogeneous Q. A by-product of our procedure is a bound (dn)^O(k) on the number of connected components of Z. The procedure consists of exact symbolic computations in D and outputs vectors of algebraic numbers. It involves extending K by infinitesimals and subsequent limit computation by a novel procedure that utilizes knowledge of an explicit isomorphism between real algebraic sets.
description: 34 pages, LaTeX (Computational Complexity (cc.cls) class used); updated version, to appear in Comp. Complexity
Generalized maximum entropy estimation of discrete choice models
Creators: name: Corral, Paul
name: Terbish, Mungo
name: Corral, Paul
name: Terbish, Mungo
Publisher: name: Unknown
Year: 2015
Subjects: subject: Research Methods/ Statistical Methods
subject: gmentropylogit
subject: generalized maximum entropy
subject: maximum entropy
subject: logit
subject: discrete choice

description: In this article, we describe the gmentropylogit command, which implements the generalized maximum entropy estimation methodology for discrete choice models. This information theoretic procedure is preferred over its maximum likelihood counterparts because it is more efficient, avoids strong parametric assumptions, works well when the sample size is small, performs well when the covariates are highly correlated, and functions well when the matrix is ill conditioned. Here we introduce the generalized maximum entropy procedure and provide an example using the gmentropylogit command.
Fronteiras incertas: da integração dos sistemas à expansão dos serviços
Creators: name: Cordeiro, Maria Inês
name: Carvalho, Joaquim Ramos
Publisher: name: Cadernos BAD
Year: 2003

description: A evolução da tecnologia web é uma realidade que extravasa o campo tecnológico e que reflecte alterações mais profundas, de vária ordem, que tomam várias formas à superfície dos sistemas de informação. A compreensão da tecnologia é, por sua vez, um factor fundamental para analisar e muitas vezes reorientar, essas transformações. Neste artigo é analisada a tecnologia dos serviços web nessa perspectiva, realçando o seu alcance e significado. O artigo conjuga uma explanação dos componentes técnicos e conceptuais subjacentes aos serviços web com perspectivas sobre as suas potencialidades aplicadas à gestão de serviços de informação, especialmente do ponto de vista das bibliotecas.
description: Cadernos BAD, N.º 2 (2003): Informação, documentação e conhecimento
Tightening Bounds for Variational Inference by Revisiting Perturbation Theory
Creators: name: Bamler, Robert
name: Zhang, Cheng
name: Opper, Manfred
name: Mandt, Stephan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Variational inference has become one of the most widely used methods in latent variable modeling. In its basic form, variational inference employs a fully factorized variational distribution and minimizes its KL divergence to the posterior. As the minimization can only be carried out approximately, this approximation induces a bias. In this paper, we revisit perturbation theory as a powerful way of improving the variational approximation. Perturbation theory relies on a form of Taylor expansion of the log marginal likelihood, vaguely in terms of the log ratio of the true posterior and its variational approximation. While first order terms give the classical variational bound, higher-order terms yield corrections that tighten it. However, traditional perturbation theory does not provide a lower bound, making it inapt for stochastic optimization. In this paper, we present a similar yet alternative way of deriving corrections to the ELBO that resemble perturbation theory, but that result in a valid bound. We show in experiments on Gaussian Processes and Variational Autoencoders that the new bounds are more mass covering, and that the resulting posterior covariances are closer to the true posterior and lead to higher likelihoods on held-out data.
description: To appear in Journal of Statistical Mechanics: Theory and Experiment (JSTAT), 2019