cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Dynamic-Mode Decomposition and Optimal Prediction
Creators: name: Curtis, Christopher W.
name: Alford-Lago, Daniel Jay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The Dynamic-Mode Decomposition (DMD) is a well established data-driven method of finding temporally evolving linear-mode decompositions of nonlinear time series. Traditionally, this method presumes that all relevant dimensions are sampled through measurement. To address dynamical systems in which the data may be incomplete or represent only partial observation of a more complex system, we extend the DMD algorithm by including a Mori-Zwanzig Decomposition to derive memory kernels that capture the averaged dynamics of the unresolved variables as projected onto the resolved dimensions. From this, we then derive what we call the Memory-Dependent Dynamic Mode Decomposition (MDDMD). Through numerical examples, the MDDMD method is shown to produce reasonable approximations of the ensemble-averaged dynamics of the full system given a single time series measurement of the resolved variables.
2-loop QCD corrections to Bc-meson leptonic constant
Creators: name: Onishchenko, Andrei I.
name: Veretin, Oleg L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present results for two-loop QCD corrections to the short distance coefficient that governs leptonic decay of Bc-meson. After brief discussion of the technics of asymptotic threshold expansion used to perform this calculation, we give comments on the numerical value of two-loop corrections and its impact on NRQCD description of Bc-meson bound state dynamics.
description: 12 pages, 1 figure, v2: typos in appendix corrected; v3: Mathematica ant text files with results attached
Conservation of Biodiversity is the Most Important Aspect of Ecologically Sustainable Development: An Economic Perspective
Creators: name: Tisdell, Clement A.
name: Tisdell, Clement A.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Environmental Economics and Policy
subject: sustainable development
subject: biodiversity conservation
subject: biological diversity

description: Several different concepts of sustainable development exist in the literature (Tisdell, 1993, Ch. 9). However, it seems that no matter which of these concepts is adopted conservation of biological diversity is necessary for its achievement, even though there is room for argument •about the amount and type of biodiversity that should be preserved.
“A question of human dignity”. Identifying solutions to improve WASH for people experiencing homelessness. A case study from Germany
Creators: name: Stanglow, S.N.
name: Schmiege, Dennis
name: Flacke, J.
name: Anthonj, C.
name: Manga, M.
name: Grunwald, N.
name: Leinen, A.
Publisher: name: Elsevier
Year: 2024

description:
Urban poverty and homelessness keep growing while investments in health-promoting services and public infrastructure, including drinking water, sanitation and hygiene (WASH) have been decreasing. We used a mixed-method approach to collect data from 45 unhoused individuals in Germany identifying individual, infrastructure-specific, and location-based solutions to improve public WASH. Suggestions included adapting existing infrastructure, opening up existing, but inaccessible and constructing new inclusive infrastructure. Proactive, long-term sustainable solutions were preferred over reactive short-time options. Realizing safe WASH for all requires collaboration between homeless communities, governmental bodies, NGOs, businesses, and sanitation experts.
On geometric potentials in nanomechanical circuits
Creators: name: Chaplik, Alexander V.
name: Blick, Robert H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We demonstrate the formation of confinement potentials in suspended nanostructures induced by the geometry of the devices. We then propose a setup for measuring the resulting geometric phase change of electronic wave functions in such a mechanical nanostructure. The device consists of a suspended loop through which a phase coherent current is driven. Combination of two and more geometrically induced potentials can be applied for creating mechanical quantum bit states.
Ecotourism, Economics and the Environment
Creators: name: Tisdell, Clement A.
name: Tisdell, Clement A.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Environmental Economics and Policy
subject: nature-based tourism
subject: ecotourism
subject: expenditure by tourists
subject: protected areas

description: With growing interest in conservation and growing incomes, nature-based tourism has grown rapidly. However, there are some differences in views about what constitutes nature-based tourism or ecotourism and these are briefly discussed. Then some estimates of the economic value of ecotourism are given and possible socio-economic benefits of it are listed. But these benefits are not certain, e.g., in some cases, there are considerable economic 'leakages' from expenditure by tourists and the local community gains little; self-financing of protected areas relying on proceeds from ecotourism is not always possible. Furthermore ecotourism business enterprises often have to operate under severe economic constraints (some are specified) which may prevent them from being economically viable. Again ecotourism is not without environmental impacts and management of it in protected areas is needed to limit these impacts. In addition, • it is noted that other industries can have adverse impacts on environments used for ecotourism. Because of the above issues, there is a need to plan tourism development systematically in protected areas and steps which may be taken in that regard are outlined. While some natural or protected areas are very suitable for the development of ecotourism, other areas are .not at all suitable and a checklist is provided to enable park managers to decide. the suitability of a particular area for ecotourism.
ЎЗБЕКИСТОНДАГИ СИЁСИЙ ЖАРАЁНЛАРДА ХОТИН-ҚИЗЛАРНИНГ ИШТИРОКИНИ ЯНАДА ФАОЛЛАШТИРИШ
Creators: name: Чориева, Дилрабо
Publisher: name: Zenodo
Year: 2024

description: Ушбу  мақолада  Ўзбекистонда аралаш сайлов тизимининг жорий этилиши ва уни амалга ошириш механизмлари, аралаш сайлов тизими тушунчаси, моҳияти, мазмуни, сайлов комиссияларининг фаолиятини такомиллаштириш, сиёсий партияларнинг сайловларда иштироки, сайловларда номзодларни кўрсатиш тартиби, сайловчиларининг ярмидан кўпи  хотин-қизларни ташкил этиши, сиёсий партияларнинг “Аёллар қаноти” нинг асосий вазифалари, хотин-қизларнинг ижтимоий-сиёсий фаоллигини ошириш, ҳуқуқ ҳамда манфаатларини таъминлаш ва ҳимоя қилиш, уларнинг ижтимоий-сиёсий ислоҳотлардаги иштирокини фаоллаштириш, жамиятнинг ҳар бир жабҳасида уларнинг фаол иштирокини таъминлаш, яратилган шундай имкониятлар натижасида мамлакатимиз парламентида ва маҳаллий кенгашларда хотин-қизлар сони ва ҳиссаси тобора ортиб бораётганлигига доир масалалар таҳлил этилган.
q-deformed conformal correlation functions
Creators: name: Mesref, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A q-analogue of four dimensional conformally invariant field theory based on the quantum algebra U_{q}(so(4,2)) is proposed. The two- and three-point correlation functions are calculated. The construction is elaborated in order to fit the Hopf algebra structure.
description: 13 pages, minor corrections, Journal-ref added
Socio-economic Issues and Strategies for Biodiversity Conservation in China with Observations from Xishuangbanna
Creators: name: Tisdell, Clement A.
name: Tisdell, Clement A.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Environmental Economics and Policy
subject: Xishuangbanna
subject: China
subject: Biodiversity Conservation
subject: China's Agenda 21
subject: fencing and management of nature reserve
subject: forestry

description: Brings attention to recent environmental policy documents which have been released in China such as China’s Agenda 21 which is a white paper outlining policies to achieve sustainable developing in China. Another important recent document is China: Biodiversity Conservation Plan. It identifies tropical reserves in Xishuangbanna Prefecture as having a high priority for nature conservation. A field trip to Xishuangbanna in October 1994 enabled first hand observations to be made about combining economic development and conservation in the Prefecture. Difficulties and initiatives discussed include the fencing and management of Xishuangbanna State Nature Reserve, its income from multiple operations and economic concessions, ecotourism and tourism development, the role of agroforestry and social forestry and other community development projects in easing pressures for the economic exploitation of the Reserve and the impact of wildlife 'pests' such as elephants which stray from the Reserve and cause damage to agriculture.
Perfect anomalous reflection using compound metallic metagratings
Creators: name: Rahmanzadeh, Mahdi
name: Khavasi, Amin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Metagrating is a new concept for wavefront manipulation that, unlike phase gradient metasurfaces, does not suffer from low efficiency and also has a less complicated fabrication process. In this paper, a compound metallic grating (a periodic structure with more than one slit in each period) is proposed for anomalous reflection. The electromagnetic response of this grating is analyzed by a proposed analytical method and then a closed-form and analytical expressions are presented for the reflection coefficients of the higher diffracted orders. The proposed method is verified by full-wave simulations and the results are in excellent agreement. Thanks to the geometrical asymmetry of compound metallic grating, we use it for designing anomalous reflection in the normal incident. Given analytical expressions for reflection coefficients, a perfect anomalous reflector is designed via transferring all the incident power to (-1) diffraction order. The structure designed in this study has an unprecedented near-to-unitary efficiency of 99.9%. Finally, a multi-element compound metallic grating is proposed for reflecting the normal incident to angles of below 30, which is a challenging accomplishment. This excellent performance of compound metallic grating shows its high potential for microwave and terahertz wave-front manipulation applications.
Suppression of chemotactic singularity by buoyancy
Creators: name: Hu, Zhongtian
name: Kiselev, Alexander
name: Yao, Yao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Chemotactic singularity formation in the context of the Patlak-Keller-Segel equation is an extensively studied phenomenon. In recent years, it has been shown that the presence of fluid advection can arrest the singularity formation given that the fluid flow possesses mixing or diffusion enhancing properties and its amplitude is sufficiently strong - this effect is conjectured to hold for more general classes of nonlinear PDEs. In this paper, we consider the Patlak-Keller-Segel equation coupled with a fluid flow that obeys Darcy's law for incompressible porous media via buoyancy force. We prove that in contrast with passive advection, this active fluid coupling is capable of suppressing singularity formation at arbitrary small coupling strength: namely, the system always has globally regular solutions.
description: 31 pages, 2 figures; to appear in Geom. Funct. Anal
MOESM1 of Adaptive divergence in shell morphology in an ongoing gastropod radiation from Lake Malawi
Creators: name: Bocxlaer, Bert Van
name: Ortiz-Sepulveda, Claudia
name: Gurdebeke, Pieter
name: Vekemans, Xavier
Publisher: name: figshare
Year: 2020
Subjects: subject: Molecular Biology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 1: This additional file contains supplementary information to the main text and consists of supplementary text, table S1, figure S1 and S2. Supplementary text includes additional methodological descriptions and results. The additional methodological descriptions contain a description of sampling procedures, technical information on how aquaria were set up, extended experimental procedures that were required by ampullariid biology, information for reproducibility of morphometric data collecting, and descriptions of the models that were used in model-based clustering. Additional results consist of direct observations on the reproduction of Lanistes. Table S1. Results of E-tests of multivariate normality per morphospecies and generation. Figure S1. Comparison of the morphospace occupation reconstructed by non-metric multidimensional scaling (nmMDS) in 2 and 3 dimensions along nmMDS1 and 2, with vectors representing how individual specimens are displaced from the 3D configuration to the 2D configuration. Figure S2. Geometric morphometric shape changes along nmMDS1 and 2.
Spontaneous electron emission from hot silver dimer anions: Breakdown of the Born-Oppenheimer approximation
Creators: name: Anderson, E. K.
name: Schmidt-May, A. F.
name: Najeeb, P. K.
name: Eklund, G.
name: Chartkunchand, K. C.
name: Rosén, S.
name: Larson, Å.
name: Hansen, K.
name: Cederquist, H.
name: Zettergren, H.
name: Schmidt, H. T.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: We report the first experimental evidence of spontaneous electron emission from a homonuclear dimer anion through direct measurements of $\rm{Ag}_2^- \rightarrow \rm{Ag}_2 + \rm{e}^-$ decays on milliseconds and seconds time scales. This observation is very surprising as there is no avoided crossing between adiabatic energy curves to mediate such a process. The process is weak but yet dominates the decay signal after 100 ms when ensembles of internally hot Ag$_2^-$ ions are stored in the cryogenic ion-beam storage ring, DESIREE, for 10 seconds. The electron emission process is associated with an instantaneous, very large, reduction of the vibrational energy of the dimer system. This represents a dramatic deviation from a Born-Oppenheimer description of dimer dynamics.
Regelung von Offshore-Windparks mit Dioden-Gleichrichter-HGÜ in einem synthetischen Referenzsystem
Creators: name: Prignitz, Cord
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 621.3 Electrical Engineering, Electronics

description: Die Arbeit beschreibt ein Regelungsverfahren für Windenergieanlagen in Offshore-Windparks mit Diodengleichrichter-HGÜ. Die konventionelle Synchronisation auf die lokale Netzspannung wird dabei durch die Vorgabe eines externen Synchronisationssignals ersetzt. Alle netzseitigen Umrichter des Offshore-Inselnetzes werden somit stromgeregelt in einem gemeinsamen synthetischen Referenzsystem betrieben.
The Mass Budget of Merging Quasars
Creators: name: Menou, Kristen
name: Haiman, Zoltan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two spectacular results emerging from recent studies of nearby dead quasars and distant active quasars are (i) the existence of tight relations between the masses of black holes (BHs) and the properties of their host galaxies (spheroid luminosity or velocity dispersion, galaxy mass), and (ii) a consistency between the local mass density in BHs and that expected by summing up the light received from distant active quasars. These results are partly shaped by successive galactic mergers and BH coalescences, since mergers redistribute the population of BHs in galaxies and BH binary coalescences reduce the mass density in BHs through losses to gravitational waves. Here, we isolate and quantify these effects by following the cosmological merger history of a population of massive BHs representing the quasar population between z = 3 and z =0. Our results suggest that the relation between BH mass and host galaxy properties, and inferences on the global efficiency of BH accretion during active quasar phases, could be influenced by the cumulative effect of repeated mergers.
description: 21 pages, 9 figures, 1 Table, accepted for publication in the Journal of the Korean Physical Society (Special Issue: Proceedings of ``Black Hole Astrophysics 2004,'' Pohang, S. Korea.)
Collection Space Navigator: An Interactive Visualization Interface for Multidimensional Datasets
Creators: name: Ohm, Tillmann
name: Solà, Mar Canet
name: Karjus, Andres
name: Schich, Maximilian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: We introduce the Collection Space Navigator (CSN), a browser-based visualization tool to explore, research, and curate large collections of visual digital artifacts that are associated with multidimensional data, such as vector embeddings or tables of metadata. Media objects such as images are often encoded as numerical vectors, for e.g. based on metadata or using machine learning to embed image information. Yet, while such procedures are widespread for a range of applications, it remains a challenge to explore, analyze, and understand the resulting multidimensional spaces in a more comprehensive manner. Dimensionality reduction techniques such as t-SNE or UMAP often serve to project high-dimensional data into low dimensional visualizations, yet require interpretation themselves as the remaining dimensions are typically abstract. Here, the Collection Space Navigator provides a customizable interface that combines two-dimensional projections with a set of configurable multidimensional filters. As a result, the user is able to view and investigate collections, by zooming and scaling, by transforming between projections, by filtering dimensions via range sliders, and advanced text filters. Insights that are gained during the interaction can be fed back into the original data via ad hoc exports of filtered metadata and projections. This paper comes with a functional showcase demo using a large digitized collection of classical Western art. The Collection Space Navigator is open source. Users can reconfigure the interface to fit their own data and research needs, including projections and filter controls. The CSN is ready to serve a broad community.
Merger rate distribution of primordial black hole binaries with electric charges
Creators: name: Liu, Lang
name: Guo, Zong-Kuan
name: Cai, Rong-Gen
name: Kim, Sang Pyo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider gravitational radiation and electromagnetic radiation from point mass binary with electric charges in a Keplerian orbit, and calculate the merger rate distribution of primordial black hole binaries with charges and a general mass function by taking into account gravitational torque and electromagnetic torque by the nearest primordial black hole. We apply the formalism to the extremal charged case and find that $α=-(m_i+m_j)^2\partial^2 \ln {\cal R}(m_i,m_j)/\partial m_i \partial m_j=12/11$, which is independent of the mass function.
description: V2, references added; V3, 2 figures, 10 pages, PRD version;
Graph bundles and Ricci-flatness
Creators: name: Li, Wenbo
name: Liu, Shiping
Publisher: name: arXiv
Year: 2023
Subjects: subject: Differential Geometry (math.DG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We develop a systematical way of constructing S-Ricci flat graphs which are not Abelian Cayley via graph bundle with explicit examples. For this purpose, we prove that, with some natural constrains, a non-trivial graph bundle can not be isomorphic (as graphs) to the product of the base graph and fiber graph. It stands in clear contrast to the continuous case.
description: We add an assumption in the statement of Theorem 3 and 4 which was omitted in the previous version and also a new example
Phase coherent quantum mechanical spin tranport in a weakly disordered quasi one-dimensional channel
Creators: name: Cahay, M.
name: Bandyopadhyay, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A transfer matrix technique is used to model phase coherent spin transport in the weakly disordered quasi one-dimensional channel of a gate-controlled electron spin interferometer [Datta and Das, Appl. Phys. Lett., 56, 665 (1990)]. It includes the effects of an axial magnetic field in the channel of the interferometer (caused by the ferromagnetic contacts), a Rashba spin-orbit interaction, and elastic (non-magnetic) impurity scattering. We show that in the presence of the axial magnetic field, non-magnetic impurities can cause spin relaxation in a manner similar to the Elliott-Yafet mechanism. The amplitudes and phases of the conductance oscillations of the interferometer, and the degree of spin-conductance polarization, are found to be quite sensitive to the height of the interface barrier at the contact, as well as the strength, locations and nature (attractive or repulsive) of just a few elastic non-magnetic impurities in the channel. This can seriously hinder practical applications of spin interferometers.
description: 9 figures
title: Ripensare la ricerca per ripensare la città
Creators: name: Grassi, Paolo
Publisher: name: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani
Year: 2019
Subjects: Interdisciplinarietà, Città, Antropologia, Urbanistica

description: Intervista a cura di Paolo Grassi. Grazie al lavoro di coordinamento del Corso di Laurea Magistrale in Scienze Antropologiche ed Etnologiche e del Dottorato di Antropologia Culturale e Sociale dell’Università di Milano-Bicocca, il 21 febbraio 2019 a Milano si è celebrato per la prima volta in Italia il World Anthropology Day, promosso dall’American Anthropological Association per mostrare l’importanza e l’utilità del sapere antropologico dentro e fuori l’accademia. Nell’ambito della manifestazione, che ha visto collaborare istituzioni e svariate realtà associative, è stato organizzato presso lo spazio culturale del Mercato Lorenteggio un incontro intitolato “Ripensare la ricerca per ripensare la città”, una conversazione interdisciplinare sulle opportunità e sui problemi che legano ricerca, didattica e interventi nella sfera pubblica. L’incontro è stato curato da Erika Lazzarino, antropologa fondatrice dell’Associazione culturale Dynamoscopio. Sono intervenuti Ivan Bargna, antropologo dell’Università di Milano Bicocca e Francesca Cognetti, urbanista del Politecnico Milano. Di seguito viene riportato il testo della conversazione.
description: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani, N. 6 (2020): La città interdisciplinare. Per itinerari non tracciati tra saperi urbani / The interdisciplinary city. Untracked itineraries of/for urban knowledges
Kink-inhomogeneity interaction in the sine-Gordon model
Creators: name: Gatlik, Jacek
name: Dobrowolski, Tomasz
name: Kevrekidis, Panayotis G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In the present study the interaction of a sine-Gordon kink with a localized inhomogeneity is considered. In the absence of dissipation, the inhomogeneity considered is found to impose a potential energy barrier. The motion of the kink for near-critical values of velocities separating transmission from barrier reflection is studied. Moreover, the existence and stability properties of the kink at the relevant saddle point are examined and its dynamics is found to be accurately captured by effective low-dimensional models. In the case where there is dissipation in the system, below the threshold value of the current, a stable kink is found to exist in the immediate vicinity of the barrier. The effective particle motion of the kink is investigated obtaining very good agreement with the result of the original field model. Both one and two degree-of-freedom settings are examined with the latter being more efficient than the former in capturing the details of the kink motion.
description: 21 pages, 17 figures
Effective Lagrangian and Dynamical Symmetry Breaking in the SU(2)XU(1) NJL Model
Creators: name: Kruglov, S. I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Dynamical symmetry breaking and the formation of scalar condensates in the SU(2)XU(1) Nambu-Jona-Lasinio model with two coupling constants has been studied in the framework of the mean field approximation. The bosonization procedures of the model are performed using the functional integration method. The possibility of the spontaneous CP symmetry breaking in the model under consideration has been shown. The mass spectrum of the bound states of fermions, as well as the effective Lagrangian of interacting scalar and pseudoscalar mesons are obtained.
description: 7 pages, LaTeX. Minor corrections
MOESM1 of A systematic review protocol examining workplace interventions that aim to improve employee health and wellbeing in male-dominated industries
Creators: name: Hulls, Paige
name: Richmond, Rebecca
name: Martin, Richard
name: Vocht, Frank
Publisher: name: figshare
Year: 2020
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1. PRISMA-P Checklist.
Heat Transport Through Josephson Point Contacts
Creators: name: Zhao, Erhai
name: Lofwander, Tomas
name: Sauls, J. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a comprehensive study of heat transport through small superconducting point contacts. The heat current for a temperature biased weak link is computed as a function of temperature and barrier transparency of the junction. The transport of thermal energy is controlled by the quasiparticle transmission probability for the point contact that couples the superconducting leads. We derive this transmission probability and results for the heat current starting from nonequilibrium transport equations and interface boundary conditions for the Keldysh propagators in quasiclassical approximation. We discuss the thermal conductance for both clean and dirty superconducting leads, as well as aspects of the nonlinear current response. We show that the transmission probability for continuum quasiparticle states is both energy- and phase-dependent, and controlled by an interface Andreev bound state below the continuum. For high transparency barriers the formation of a low-energy bound state, when the phase is tuned to $ϕ=π$, leads to a reduction of the heat current relative to that for $ϕ=0$. For low-transparency barriers, a shallow Andreev bound state just below the continuum edge is connected with resonant transmission of quasiparticles for energies just above the gap edge, and leads to enhanced heat conductance as the temperature is lowered below the superconducting transition.
description: 13 pages, 8 figures
AGRICULTURA FAMILIAR NO SEMI-ÁRIDO: FATALIDADE DE EXCLUSÃO OU RECURSO PARA O DESENVOLVIMENTO SUSTENTÁVEL
Creators: name: Baiardi, Amilcar
name: Mendes, Januzia
name: Baiardi, Amilcar
name: Mendes, Januzia
Publisher: name: Unknown
Year: 2006
Subjects: subject: Community/Rural/Urban Development
subject: Consumer/Household Economics
subject: Farm Management
subject: Financial Economics
subject: Resource /Energy Economics and Policy
subject: Semi-Árido
subject: Desenvolvimento Rural Sustentável
subject: Agricultura Familiar
subject: Capital Social e Ação Coletiva

description: A melhoria do padrão de vida das populações rurais do Semi-Árido por meio do desenvolvimento rural sustentável continua sendo um desafio para o Estado e para a sociedade civil. A intervenção considerada de maior êxito que é a irrigação em perímetros públicos, requer investimentos ingentes, longo prazo de maturação, além de disponibilidade combinada de água e solos adequados. Recentes abordagens associando a ação coletiva no manejo os recursos naturais com o emprego da pequena irrigação, sugerem intervenções de baixo custo e mais generalizáveis no espaço do Semi-Árido. Este trabalho focaliza as condicionantes e possibilidades das ações coletivas dos agricultores familiares do Semi-Árido e sua propensão para conceber e conduzir arranjos produtivos locais, passíveis de serem implantados com o uso de técnicas de convivência com a seca.
Dust and Radiation Quantum Perfect Fluid Cosmology : Selection of Time Variable
Creators: name: Wang, I. -Chin
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We studied the expectation value of the scale factor in radiation and dust quantum perfect fluid cosmology. We used Schutz variational formalism to describe perfect fluid and selected the conjugate coordinate of perfect fluid be dynamical variable. After quantization and solving the Wheeler-DeWitt equation can obtain the exact solution. By superposition of the exact solution, we obtained one wave packets and used it to compute the expectation value of the scale factor. We found that if one select different dynamical variable be the time variable in each of these two systems, the expectation value of the scale factor of these two systems can fit in with the prediction of General Relativity. Therefore we thought that the selection of reference time can be different for different quantum perfect fluid systems.
description: 5 pages, revtex4 type
title: Città educative: un alfabeto
Creators: name: Surian, Alessio
Publisher: name: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani
Year: 2019
Subjects: cittadinanza; ecologia; pedagogie trasformative

description: Ricorrendo alla forma di un lemmario incompleto, l’articolo sceglie alcuni temi chiave che interrogano la capacità dell’educazione formale e non formale in ambito urbano di affrontare le difficoltà a relazionarsi con la diversità biologica e culturale. Pone il problema di come si possa praticare un ripensamento in chiave interdisciplinare delle scelte e degli ambienti educativi in risposta ad un modello di scuola divenuta istituzione planetaria con forti elementi di omogeneizzazione culturale, lontana dal favorire una società più ecologica e dalla ricerca di processi di cura della competizione esasperata e della progressiva scissione fra umani e contesto biologico. The paper presents a brief and incomplete dictionary. It lists a series of topical issues that question the ability of urban formal and non-formal education to address human difficulties in terms of relating to biological and cultural diversity. It raises the question of how to re-think in interdisciplinary ways educational environment and choices in order to challenge the current schooling model which is becoming a planetary institution. Such institution favours cultural homogeneity that is far from encouraging a more ecological society. It is also far from promoting research on the caring process are lacking in relation to enhanced competition and to the increasing split between humans and the biological world.
description: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani, N. 6 (2020): La città interdisciplinare. Per itinerari non tracciati tra saperi urbani / The interdisciplinary city. Untracked itineraries of/for urban knowledges
Renormalization and universality of the Hofstadter spectrum
Creators: name: Koch, Hans
name: Kocic, Sasha
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37E20, 37F25, 34L40, 47A10

description: We consider a renormalization transformation $R$ for skew-product maps of the type that arise in a spectral analysis of the Hofstadter Hamiltonian. Periodic orbits of $R$ determine universal constants analogous to the critical exponents in the theory of phase transitions. Restricting to skew-product maps over a circle-rotations by the golden mean, we find several periodic orbits for $R$, and we conjecture that there are infinitely many. Interestingly, all scaling factors that have been determined to high accuracy appear to be algebraically related to the circle-rotation number. We present evidence that these values describe (among other things) local scaling properties of the Hofstadter spectrum.
MOESM2 of Menâ€™s grief following pregnancy loss and neonatal loss: a systematic review and emerging theoretical model
Creators: name: Obst, Kate
name: Clemence Due
name: Oxlad, Melissa
name: Middleton, Philippa
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: Additional file 2: Overview of studies
Functional Ghobber-Jaming Uncertainty Principle
Creators: name: Krishna, K. Mahesh
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 42C15, 46B03, 46B04

description: Let $(\{f_j\}_{j=1}^n, \{τ_j\}_{j=1}^n)$ and $(\{g_k\}_{k=1}^n, \{ω_k\}_{k=1}^n)$ be two p-orthonormal bases for a finite dimensional Banach space $\mathcal{X}$. Let $M,N\subseteq \{1, \dots, n\}$ be such that \begin{align*}
 o(M)^\frac{1}{q}o(N)^\frac{1}{p}< \frac{1}{\displaystyle \max_{1\leq j,k\leq n}|g_k(τ_j) |}, \end{align*} where $q$ is the conjugate index of $p$. Then for all $x \in \mathcal{X}$, we show that \begin{align}\label{FGJU} (1) \quad \quad \quad \quad \|x\|\leq \left(1+\frac{1}{1-o(M)^\frac{1}{q}o(N)^\frac{1}{p}\displaystyle\max_{1\leq j,k\leq n}|g_k(τ_j)|}\right)\left[\left(\sum_{j\in M^c}|f_j(x)|^p\right)^\frac{1}{p}+\left(\sum_{k\in N^c}|g_k(x) |^p\right)^\frac{1}{p}\right]. \end{align}
 We call Inequality (1) as \textbf{Functional Ghobber-Jaming Uncertainty Principle}. Inequality (1) improves the uncertainty principle obtained by Ghobber and Jaming \textit{[Linear Algebra Appl., 2011]}.
description: 7 Pages, 0 Figures
On The Dark Side of Quasar Evolution
Creators: name: Menou, Kristen
name: Haiman, Zoltan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent improved determinations of the mass density rho_BH of supermassive black holes (SMBHs) in the local universe have allowed accurate comparisons of rho_BH with the amount of light received from past quasar activity. These comparisons support the notion that local SMBHs are ``dead quasars'' and yield a value epsilon >~ 0.1 for the average radiative efficiency of cosmic SMBH accretion. BH coalescences may represent an important component of the quasar mass assembly and yet not produce any observable electromagnetic signature. Therefore, ignoring gravitational wave (GW) emission during such coalescences, which reduces the amount of mass locked into remnant BHs, results in an overestimate of epsilon. Here, we put constraints on the magnitude of this bias. We calculate the cumulative mass loss to GWs experienced by a representative population of BHs during repeated cosmological mergers, using loss prescriptions based on detailed general relativistic calculations. Despite the possibly large number of mergers in the assembly history of each individual SMBH, we find that near--equal mass mergers are rare, and therefore the cumulative loss is likely to be modest, amounting at most to an increase by 20 percent of the inferred epsilon value. Thus, recent estimates of epsilon >~ 0.1 appear robust. The space interferometer LISA should provide empirical constraints on the dark side of quasar evolution, by measuring the masses and rates of coalescence of massive BHs to cosmological distances.
description: 12 pages, 2 figures, 1 Table, accepted for publication in ApJ
On the accumulation points of non-periodic orbits of a difference equation of fourth order
Creators: name: Bas, Antonio Linero
name: Mañosa, Víctor
name: Roldán, Daniel Nieves
Publisher: name: arXiv
Year: 2023
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 39A10, 39A23, 39A05, 37E99

description: In this paper, we are interested in analyzing the dynamics of the fourth-order difference equation $x_{n+4} = \max\{x_{n+3},x_{n+2},x_{n+1},0\}-x_n$, with arbitrary real initial conditions. We fully determine the accumulation point sets of the non-periodic solutions that, in fact, are configured as proper compact intervals of the real line. This study complements the previous knowledge of the dynamics of the difference equation already achieved in [M. Csörnyei, M. Laczkovich, Monatsh. Math. 132 (2001), 215-236] and [A. Linero Bas, D. Nieves Roldán, J. Difference Equ. Appl. 27 (2021), no. 11, 1608-1645].
About Classical Aspect of the Chiral Symmetry Dynamical Breaking in Three-Dimensional Electrodynamics
Creators: name: Pevzner, M. Sh.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Attention is paid to the fact that the stress tensor diagonal components of the point charged particle field in three-dimensional electrodynamics are equal to zero. It allows to suppose the particle mass origin is field in the model, if one loop correction to the classical potential of this field is taken into account. In the noticed approach static potential and field strength are evaluated and the electrical radius of the particle is found. It turns out that this radius is connected with the vacuum polarization and with the particle electrical field screening at the large distances.
description: 6 pages
Left Regular Bands of Groups and the Mantaci--Reutenauer algebra
Creators: name: Bastidas, Jose
name: Brauner, Sarah
name: Saliola, Franco
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E10, 05E18, 16Gxx, 20M10

description: We develop the idempotent theory for algebras over a class of semigroups called left regular bands of groups (LRBGs), which simultaneously generalize group algebras of finite groups and left regular band (LRB) algebras. Our techniques weave together the representation theory of finite groups and LRBs, opening the door for a systematic study of LRBGs in an analogous way to LRBs. We apply our results to construct complete systems of primitive orthogonal idempotents in the Mantaci--Reutenauer algebra ${\sf{MR}}_n[G]$ associated to any finite group $G$. When $G$ is abelian, we give closed form expressions for these idempotents, and when $G$ is the cyclic group of order two, we prove that these recover idempotents introduced by Vazirani.
description: To appear in Journal of Algebra
Electron-Transfer-Induced Thermal and Thermoelectric Rectification
Creators: name: Craven, Galen T.
name: He, Dahai
name: Nitzan, Abraham
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Controlling the direction and magnitude of both heat and electronic currents using rectifiers has significant implications for the advancement of molecular circuit design. In order to facilitate the implementation of new transport phenomena in such molecular structures, we examine thermal and thermoelectric rectification effects that are induced by an electron transfer process that occurs across a temperature gradient between molecules. Historically, the only known heat conduction mechanism able to generate thermal rectification in purely molecular environments is phononic heat transport. Here, we show that electron transfer between molecular sites with different local temperatures can also generate a thermal rectification effect and that electron hopping through molecular bridges connecting metal leads at different temperatures gives rise to asymmetric Seebeck effects, that is, thermoelectric rectification, in molecular junctions.
On invariant generating sets for the cycle space
Creators: name: Timár, Ádám
Publisher: name: arXiv
Year: 2023
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: Consider a unimodular random graph, or just a finitely generated Cayley graph. When does its cycle space have an invariant random generating set of cycles such that every edge is contained in finitely many of the cycles? Generating the free Loop $O(1)$ model as a factor of iid is closely connected to having such a generating set for FK-Ising cluster. We show that geodesic cycles do not always form such a generating set, by showing for a parameter regime of the FK-Ising model on the lamplighter group the origin is contained in infinitely many geodesic cycles. This answers a question by Angel, Ray and Spinka. Then we take a look at how the property of having an invariant locally finite generating set for the cycle space is preserved by Bernoulli percolation, and apply it to the problem of factor of iid presentations of the free Loop $O(1)$ model.
title: Verso una progettazione abilitante. Lo sguardo socio-antropologico e la costruzione delle città
Creators: name: Cancellieri, Adriano
Publisher: name: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani
Year: 2019
Subjects: enabling spaces; socio-anthropology; interdisciplinarity; place attachment; spatial capital; accessibility; spatial appropriation; urban planning; socio-spatial perspective.

description: spaesamento e difficoltà ad essere addomesticati e considerati come luoghi significativi a causa del fatto che le progettazioni e le politiche urbane dominanti si disinteressano del bisogno antropologico degli abitanti di ‘farsi spazio’ e di addomesticare gli spazi di vita quotidiana. L’obiettivo dell’articolo è quello di analizzare il contributo che potrebbe fornire per colmare questo gap lo sguardo socio-antropologico con la sua messa al centro dei vissuti intersoggettivi degli abitanti e delle specificità dei contesti. Partendo dalla principale letteratura ispirata dalla prospettiva socio-spaziale delle scienze sociali, in particolare saranno individuate le principali dimensione di analisi per la progettazione di spazi abilitanti, di spazi cioè dotati di elevata accessibilità, eterogeneità di usi, capacità di promuovere relazioni e facilità nel generare attaccamento al luogo. The everyday spaces of contemporary cities seem to generate an increasing outsidness and difficulty in being domesticated and considered as significant places because dominant urban policies disregard the anthropological need of the inhabitants to 'make space' in their everyday life. The aim of the article is to analyse the contribution that it could provide to fill this gap by the socio-anthropological viewpoint that focuses the attention on the intersubjective experiences of the inhabitants and the specificity of the contexts. Starting from the main literature inspired by the socio-spatial perspective, in particular, will be identified the main dimensions of analysis for the design of enabling spaces, that is spaces with high accessibility and heterogeneity of uses and ability to promote interactions and generating place attachment.
description: Tracce Urbane. Rivista Italiana Transdisciplinare di Studi Urbani, N. 6 (2020): La città interdisciplinare. Per itinerari non tracciati tra saperi urbani / The interdisciplinary city. Untracked itineraries of/for urban knowledges
Foreign Agricultural Trade of the United States January/February 1992
Creators: name: Warden, Thomas
name: Warden, Thomas
Publisher: name: Unknown
Year: 1992
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: International Relations/Trade
subject: Research Methods/ Statistical Methods
subject: Imports
subject: High-value products
subject: Foreign trade
subject: Exports
subject: Grain

description: There was little change in the value of U.S. agricultural exports in CY 1991 ••• Agricultural imports for 1991, at $22.7 billion, were the same as in 1990••• U.S. agricultural to major markets totaled $37.6 billion in FY 1991, down from $40.2 billion.
MOESM1 of Menâ€™s grief following pregnancy loss and neonatal loss: a systematic review and emerging theoretical model
Creators: name: Obst, Kate
name: Clemence Due
name: Oxlad, Melissa
name: Middleton, Philippa
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Search strategies by database
Unrestricted Hartree-Fock for Quantum Dots
Creators: name: Reusch, Boris
name: Grabert, Hermann
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present detailed results of Unrestricted Hartree-Fock (UHF) calculations for up to eight electrons in a parabolic quantum dot. The UHF energies are shown to provide rather accurate estimates of the ground-state energy in the entire range of parameters from high densities with shell model characteristics to low densities with Wigner molecule features. To elucidate the significance of breaking the rotational symmetry, we compare Restricted Hartree-Fock (RHF) and UHF. While UHF symmetry breaking admits lower ground-state energies, misconceptions in the interpretation of UHF densities are pointed out. An analysis of the orbital energies shows that for very strong interaction the UHF Hamiltonian is equivalent to a tight-binding Hamiltonian. This explains why the UHF energies become nearly spin independent in this regime while the RHF energies do not. The UHF densities display an even-odd effect which is related to the angular momentum of the Wigner molecule. In a weak transversal magnetic field this even-odd effect disappears.
description: 13 pages, 14 figures, submitted 30. Oct. 2002, to appear in PRB. For a version with high-quality figures, see http://www.thphy.uni-duesseldorf.de/~reusch/index.html