cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Awakening the Actor’s Emotional Expressivity: A Psychophysical Approach
Creators: name: Evangelatou, Afroditi Dimitra
Publisher: name: Goldsmiths, University of London
Year: 2022

description: This thesis examines the nature of performed emotion from the perspective of the actor trainer. The research begins from a simple yet significant question: how can the trainer encourage the student-actor’s inner awakening? It proceeds to explore potential entry points to emotion and discusses key parameters that relate to its activation, such as the relational nature of acted emotion and the pleasure derived from experiencing it. 

At the centre of this research lies actor training. However, current scientific discoveries have also been considered to further understand the nature of emotion on stage and in life. The approach is psychophysical, using the actor’s body as a point of entry, inviting the inner through the outer, and in so doing, challenging the outdated perception of body and psyche as two discrete entities.

The theatre practitioners that have informed the vocabulary, the exercises, and the way of thinking for this practice-based research are: Konstantin Stanislavski, Michael Chekhov, Jerzy Grotowski, Gardzienice, Song of the Goat, Odin Teatret, Tadashi Suzuki, and Theodoros Terzopoulos. Alba Emoting, a technique specifically developed to induce emotions has also been addressed. Specific aspects of the aforementioned techniques have been chosen and further explored in acting classes where emotion is placed at the core of the training.  This has resulted in a pedagogical approach that seeks to awaken the actor’s inner life, as well as encouraging them to access high levels of energy, concentration, and presence.
On the Approximation of Unbounded Convex Sets by Polyhedra
Creators: name: Dörfler, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This article is concerned with the approximation of unbounded convex sets by polyhedra. While there is an abundance of literature investigating this task for compact sets, results on the unbounded case are scarce. We first point out the connections between existing results before introducing a new notion of polyhedral approximation called ($\varepsilon,δ$)-approximation that integrates the unbounded case in a meaningful way. Some basic results about ($\varepsilon,δ$)- approximations are proven for general convex sets. In the last section an algorithm for the computation of ($\varepsilon,δ$)-approximations of spectrahedra is presented. Correctness and finiteness of the algorithm are proven.
description: 22 pages, 4 figures, 1 table; correction of Algorithm 2, added Proposition 5.5, added references
Fast and Faster: A Comparison of Two Streamed Matrix Decomposition Algorithms
Creators: name: Řeh{ů}řek, Radim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: With the explosion of the size of digital dataset, the limiting factor for decomposition algorithms is the \emph{number of passes} over the input, as the input is often stored out-of-core or even off-site. Moreover, we're only interested in algorithms that operate in \emph{constant memory} w.r.t. to the input size, so that arbitrarily large input can be processed. In this paper, we present a practical comparison of two such algorithms: a distributed method that operates in a single pass over the input vs. a streamed two-pass stochastic algorithm. The experiments track the effect of distributed computing, oversampling and memory trade-offs on the accuracy and performance of the two algorithms. To ensure meaningful results, we choose the input to be a real dataset, namely the whole of the English Wikipedia, in the application settings of Latent Semantic Analysis.
Respiration driven CO2 pulses dominate Australia's flux variability
Creators: name: Metz, Eva-Marie
name: Vardag, Sanam N.
name: Basu, Sourish
name: Jung, Martin
name: Ahrens, Bernhard
name: El-Madany, Tarek
name: Sitch, Stephen
name: Arora, Vivek K.
name: Briggs, Peter R.
name: Friedlingstein, Pierre
name: Goll, Daniel S.
name: Jain, Atul K.
name: Kato, Etsushi
name: Lombardozzi, Danica
name: Nabel, Julia E. M. S.
name: Poulter, Benjamin
name: Séférian, Roland
name: Tian, Hanqin
name: Wiltshire, Andrew
name: Yuan, Wenping
name: Yue, Xu
name: Zaehle, Sönke
name: Deutscher, Nicholas M.
name: Griffith, David W. T.
name: Butz, André
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The Australian continent contributes substantially to the year-to-year variability of the global terrestrial carbon dioxide (CO2) sink. However, the scarcity of in-situ observations in remote areas prevents deciphering the processes that force the CO2 flux variability. Here, examining atmospheric CO2 measurements from satellites in the period 2009-2018, we find recurrent end-of-dry-season CO2 pulses over the Australian continent. These pulses largely control the year-to-year variability of Australia's CO2 balance, due to 2-3 times higher seasonal variations compared to previous top-down inversions and bottom-up estimates. The CO2 pulses occur shortly after the onset of rainfall and are driven by enhanced soil respiration preceding photosynthetic uptake in Australia's semi-arid regions. The suggested continental-scale relevance of soil rewetting processes has large implications for our understanding and modelling of global climate-carbon cycle feedbacks.
description: 28 pages (including supplementary materials), 3 main figures, 7 supplementary figures; v2 changes: Last name of first author changed
Parton showers with medium-modified splitting functions
Creators: name: Corcella, Gennaro
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss the recent implementation of medium-modified splitting functions within the HERWIG angular-ordered parton shower algorithm and present a few results on transverse momentum, energy and angular distributions.
description: 5 pages, 4 figures, 1 table. Talk given at XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2010, April 19-23, 2010, Firenze, Italy
Usuarios científicos y redes sociales. Recomendaciones para estar en una red social
Creators: name: Toboso, Aurora
Publisher: name: Digital.CSIC
Year: 2012
Subjects: Bibliotecas y redes sociales
Usuarios científicos

description: Las redes sociales son, hoy en día, casi omnipresentes y España ya se ha convertido en el 5º país del mundo donde más se utilizan. Antes de ponernos a abrir un perfil y publicar contenido en las diferentes redes sociales, deberíamos reflexionar primero por qué queremos estar en estas redes sociales y cuál es el objetivo que queremos conseguir. Estar en una red social es muy sencillo, lo difícil es estar con la orientación adecuada, mantener el perfil y crear conversación. Utilizamos las redes sociales para dar a conocer nuestra institución pero deberíamos de hacer un uso más allá del marketing y crear una cultura compartida y colaborativa entre nuestros usuarios. Si estamos en una red social, hay que analizar cómo estamos, qué tipo de comunicación establecemos con nuestros usuarios científicos y cuál es la reacción de éstos, es decir, si hay o no conversación y si participan en nuestra comunidad. Es muy importante medir lo que está sucediendo en nuestra comunidad y ver si nuestros objetivos se están cumpliendo y si estamos obteniendo los resultados previstos. Tenemos que establecer conversación con nuestros usuarios y escucharles, ya que nos van a dar mucha información de qué es lo que quieren y por lo tanto, nos van a ayudar a acercarnos a nuestros objetivos.
A method for systematic construction of Bell-like inequalities and a proposal of a new type of test
Creators: name: Isobe, Tomohiro
name: Tanimura, Shogo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Bell-Clauser-Horne-Shimony-Holt (BCHSH) inequality, which is proven in the context of the local hidden variable theory, has been used as a test to reveal failure of the hidden variable theory and to prove validity of the quantum theory. We note that violation of the BCHSH inequality is caused by noncommutativity of quantum observables and find a systematic method for constructing generalizations of the BCHSH inequality. This method is applied for inventing a new quantity which is defined in a two-qubit system and satisfies a new type of inequality. This provides a fair test of the quantum theory. Remaining problems are also discussed.
description: 15 pages, 3 figures
On the specification of modal systems: A comparison of three frameworks
Creators: name: Aceto, Luca
name: Fábregas, Ignacio
name: Escrig, David de Frutos
name: Ingólfsdóttir, Anna
name: Palomino, Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This paper studies the relationships between three notions of behavioural preorder that have been proposed in the literature: refinement over modal transition systems, and the covariant-contravariant simulation and the partial bisimulation preorders over labelled transition systems. It is shown that there are mutual translations between modal transition systems and labelled transition systems that preserve, and reflect, refinement and the covariant-contravariant simulation preorder. The translations are also shown to preserve the modal properties that can be expressed in the logics that characterize those preorders. A translation from labelled transition systems modulo the partial bisimulation preorder into the same model modulo the covariant-contravariant simulation preorder is also offered, together with some evidence that the former model is less expressive than the latter. In order to gain more insight into the relationships between modal transition systems modulo refinement and labelled transition systems modulo the covariant-contravariant simulation preorder, their connections are also phrased and studied in the context of institutions.
description: Replaced conference version with the extended paper published in a journal (This update includes a change in the title of the paper)
Geometric modelling of kink banding in laminated structures
Creators: name: Wadee, M. Ahmer
name: Völlmecke, Christina
name: Haley, Joseph F.
name: Yiatros, Stylianos
Publisher: name: arXiv
Year: 2011
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: An analytical model founded on geometric and potential energy principles for kink band deformation in laminated composite struts is presented. It is adapted from an earlier successful study for confined layered structures which was formulated to model kink band formation in the folding of geological layers. The principal aim is to explore the underlying mechanisms governing the kinking response of flat, laminated components comprising unidirectional composite laminae. A pilot parametric study suggests that the key features of the mechanical response are captured well and that quantitative comparisons with experiments presented in the literature are highly encouraging.
Polarity patterns of stress fibers
Creators: name: Yoshinaga, N.
name: Joanny, J. -F.
name: Prost, J.
name: Marcq, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Stress fibers are contractile actomyosin bundles commonly observed in the cytoskeleton of metazoan cells. The spatial profile of the polarity of actin filaments inside contractile actomyosin bundles is either monotonic (graded) or periodic (alternating). In the framework of linear irreversible thermodynamics, we write the constitutive equations for a polar, active, elastic one-dimensional medium. An analysis of the resulting equations for the dynamics of polarity shows that the transition from graded to alternating polarity patterns is a nonequilibrium Lifshitz point. Active contractility is a necessary condition for the emergence of sarcomeric, alternating polarity patterns.
description: 5 pages, 3 figures
Characterization of nanoscale mechanical heterogeneity in a metallic glass by dynamic force microscopy
Creators: name: Liu, Y. H.
name: Wang, D.
name: Nakajima, K.
name: Zhang, W.
name: Hirata, A.
name: Nishi, T.
name: Inoue, A.
name: Chen, M. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report nano-scale mechanical heterogeneity of a metallic glass characterized by dynamic atomic force microscopy. Apparent energy dissipation with the variation of ~12%, originating from non-uniform distribution of local viscoelasticity, was characterized. The correlation length of heterogeneous viscoelasticity was measured to be ~2.5{\pm}0.3 nm, which is well consistent with the dimension of shear transformation zones for plastic flow. This study provides the first experimental observation on the nano-scale mechanical heterogeneity in a metallic glass, and may fill the gap between atomic models and the macroscopic properties of metallic glasses.
Flat equivariant gerbes: holonomies and dualities
Creators: name: Cheng, Peng
name: Melnikov, Ilarion V.
name: Minasian, Ruben
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the role of global topological data associated to choices of holonomy for flat gauge fields in string compactification. Our study begins with perturbative string compactification on compact flat manifolds preserving 8 supercharges in 5 dimensions. By including non-trivial holonomy for Wilson lines in the heterotic string and for the B-field gerbe in the type II string we find worldsheet dualities that relate these backgrounds to other string compactifications. While our simple examples allow for explicit analysis, the concepts and some of the methods extend to a broader class of compactifications and have implications for string dualities, perturbative and otherwise.
description: 65 pages, tikz figures; v2: typos corrected
Generalized Centrifugal Force Model for Pedestrian Dynamics
Creators: name: Chraibi, Mohcine
name: Seyfried, Armin
name: Schadschneider, Andreas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: A spatially continuous force-based model for simulating pedestrian dynamics is introduced which includes an elliptical volume exclusion of pedestrians. We discuss the phenomena of oscillations and overlapping which occur for certain choices of the forces. The main intention of this work is the quantitative description of pedestrian movement in several geometries. Measurements of the fundamental diagram in narrow and wide corridors are performed. The results of the proposed model show good agreement with empirical data obtained in controlled experiments.
description: 10 pages, 14 figures, accepted for publication as a Regular Article in Physical Review E. This version contains minor changes
When Are Prime Formulae Characteristic?
Creators: name: Aceto, Luca
name: Della Monica, Dario
name: Fábregas, Ignacio
name: Ingólfsdóttir, Anna
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: In the setting of the modal logic that characterizes modal refinement over modal transition systems, Boudol and Larsen showed that the formulae for which model checking can be reduced to preorder checking, that is, the characteristic formulae, are exactly the consistent and prime ones. This paper presents general, sufficient conditions guaranteeing that characteristic formulae are exactly the consistent and prime ones. It is shown that the given conditions apply to various behavioural relations in the literature. In particular, characteristic formulae are exactly the prime and consistent ones for all the semantics in van Glabbeek's linear time-branching time spectrum.
description: Updated conference version with the extended version
Giant Magnons in Symmetric Spaces: Explicit N-soliton solutions for CP^n, SU(n) and S^n
Creators: name: Kalousios, Chrysostomos
name: Papathanasiou, Georgios
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Giant magnons are one of the main manifestations of integrability on the string theory side of the AdS/CFT correspondence. Motivated by the recent advances in their study, especially in the context of the string theory dual of ABJM theory, we present and prove explicit N-soliton solutions for the relevant CP^n, SU(n) and S^n sigma models. The proof is based on solving the dressing method recursion with the help of determinant operations, and our solutions hold for any choice of vacuum and soliton parameters. We further specialize our results for the choices that lead to giant magnons, and as an application, we calculate the classical time delay due to the scattering of an arbitrary number of CP^2 elementary dyonic magnons. The determinant expressions for our N-soliton solutions could possibly be used for the derivation of an effective particle description of magnon scattering.
description: 34 pages. v2: typos corrected, references updated, clarifications added; to appear in JHEP
Investigating the catalytic mechanism if Class B flavin-dependent monooxygenases
Creators: name: Fordwour, Osei Boakye
Publisher: name: University of British Columbia
Year: 2019

description: Baeyer-Villiger monooxygenases (BVMOs) and N-hydroxylating monooxygenases (NMO) belong to the Class-B flavin-dependent monooxygenases family of enzymes. Members of this family use NADPH, O₂ and an FAD cofactor to form a reactive C4a-(hydro)peroxyflavin intermediate for selective substrate oxidation. BVMOs are potential biocatalysts as they can catalyze Baeyer-Villiger oxidations, N-hydroxylations and sulfoxidations with exquisite chemo-, regio- and enantioselectivity. NMOs are involved in the biosynthesis of siderophores, having the potential to serve as drug targets for treatment of microbial diseases. Cyclohexanone monooxygenase (CHMO) from Acinetobacter sp. NCIMB 9871 serves as the prototypic member of BVMOs. In Chapters 2 and 3, it was used as a model system to investigate the role of active site residues in mediating discrete steps of the BVMO catalytic cycle. T187 and W490, which hydrogen bond to the phosphate and ribose of the nicotinamide mononucleotide half of NADP(H), respectively, were mutated to alanine and phenylalanine. Through a combination of steady-state kinetic studies, stopped-flow spectrophotometry, and product analysis, T187 was shown to be critical for locking NADP⁺ in a conformation that promotes oxygen activation by the reduced flavin. Alternatively, W490 facilitates the reaction of the C4a-peroxyflavin intermediate with cyclohexanone through stabilization of the Criegee intermediate. Kinetic isotope effects, molecular modelling and ¹H-NMR analysis revealed that the invariant R327 active site residue single-handedly controls the stereospecificity of NADPH hydride transfer, while D57 mediates substrate entry into the active site. In Chapter 4, the catalytic mechanism of acetone monooxygenase, a BVMO with the potential to serve as an acetone biosensor, was investigated. Based on our kinetic analysis, ACMO has a broad substrate specificity and a weak binding affinity for NADPH, resulting in a high rate of uncoupled NADPH oxidation leading to excess H₂O₂ production. In Chapter 5, the catalytic mechanism of cadaverine monooxygenase (DfoA), an NMO from the fire blight pathogen, Erwinia amylovora was investigated. DfoA has a narrow substrate specificity and a very high dissociation constant for NADPH. Hence, DfoA was not able to stabilize the C4a-hydroperoxyflavin intermediate. It is hoped that the strict substrate specificity elicited by DfoA can be exploited in designing new compounds to control E. amylovora virulence.
Conformal field theory for particle physicists
Creators: name: Gillioz, Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is a set of introductory lecture notes on conformal field theory. Unlike most existing reviews on the subject, CFT is presented here from the perspective of a unitary quantum field theory in Minkowski space-time. It begins with a non-perturbative formulation of quantum field theory (Wightman axioms), and then gradually focuses on the implications of scale and special conformal symmetry, all the way to the modern conformal bootstrap. This approach includes topics often left out, such as subtleties of conformal transformations in Minkowski space-time, the construction of Wightman functions and time-ordered correlators both in position- and momentum-space, unitarity bounds derived from the spectral representation, and the appearance of UV and IR divergences.
description: 70 pages, 10 figures. v2: typos fixed. v3: publisher's acknowledgement added. Feedback welcome
The Effect of Teacher Candidates’ Perceptions of Their Initial Teacher Education Program on Teaching Anxiety, Efficacy, and Commitment
Creators: name: Daniels, Lia M.
name: Mandzuk, David
name: Perry, Raymond P.
name: Moore, Ceri
Publisher: name: Alberta Journal of Educational Research
Year: 2011

description: In a novel approach to initial teacher education, we combined a program review perspective and a psychological perspective. First, we assessed the extent to which student teachers (n=137) felt that components of their BEd program prepared them for teaching and whether these components represented meaningful program dimensions. Through content analysis, exploratory factor analysis, and teacher candidates’ own words, five dimensions emerged: classroom dynamics; curriculum, instruction, and assessment; intrapersonal reflection; ethics of teaching; and professional learning community. Second, we tested how each of these dimensions predicted teaching anxiety, efficacy, and commitment. The results from regression analyses showed that ethics of teaching was the most influential dimension by decreasing anxiety and increasing efficacy and commitment. Results are discussed in terms of the effect of initial teacher education program dimensions on the psychosocial development of teacher candidates. Adoptant une approche novatrice à la formation initiale des enseignants, nous avons combiné une perspective visant l'examen des programmes avec une perspective psychologique. Nous avons d'abord évalué la mesure dans laquelle les stagiaires (n=137) estimaient que des composantes de leur programme d'études (B.Ed.) les avaient préparés pour l'enseignement et à quel point ces composantes représentaient des dimensions significatives de leurs programmes. Cinq dimensions ont découlé des analyses du contenu, des facteurs exploratoires et des propres paroles des stagiaires : la dynamique en salle de classe; le programme d’étude, l’enseignement et l’évaluation; la réflexion intrapersonnelle; l’éthique et l’enseignement; et les communautés professionnelles d’enseignement. Nous avons ensuite évalué dans quelle mesure chacune de ces dimensions constituait une variable explicative de l’anxiété, l’efficacité et l’engagement en enseignement. Les résultats sont présentés en fonction de l’effet des dimensions du programme de formation initiale des enseignants sur le développement psychosocial des stagiaires.
description: Alberta Journal of Educational Research, Vol. 57 No. 1 (2011): Spring
Logical characterisations, rule formats and compositionality for input-output conformance simulation
Creators: name: Aceto, Luca
name: Fábregas, Ignacio
name: Gregorio-Rodríguez, Carlos
name: Ingólfsdóttir, Anna
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Input-output conformance simulation (iocos) has been proposed by Gregorio-Rodríguez, Llana and Martínez-Torres as a simulation-based behavioural preorder underlying model-based testing. This relation is inspired by Tretmans' classic ioco relation, but has better worst-case complexity than ioco and supports stepwise refinement. The goal of this paper is to develop the theory of iocos by studying logical characterisations of this relation, rule formats for it and its compositionality. More specifically, this article presents characterisations of iocos in terms of modal logics and compares them with an existing logical characterisation for ioco proposed by Beohar and Mousavi. It also offers a characteristic-formula construction for iocos over finite processes in an extension of the proposed modal logics with greatest fixed points. A precongruence rule format for iocos and a rule format ensuring that operations take quiescence properly into account are also given. Both rule formats are based on the GSOS format by Bloom, Istrail and Meyer. The general modal decomposition methodology of Fokkink and van Glabbeek is used to show how to check the satisfaction of properties expressed in the logic for iocos in a compositional way for operations specified by rules in the precongruence rule format for iocos .
description: Replaced conference version for extended version (this includes a change in the name of the paper plus additional sections and results)
¿De qué se habla cuando se habla de calidad de los servicios?
Creators: name: Rey, Carina
Publisher: name: Digital.CSIC
Year: 2012
Subjects: Calidad
Servicios de calidad

description: En los últimos años, la calidad de los servicios y por ende de las bibliotecas se ha convertido en un tema estrella. En los medios de comunicación y en los foros profesionales se comentan las puntuaciones obtenidas en EFQM, los procesos de evaluación para optar a una certificación, o sobre las bondades de un modelo u otro; y surge la duda: ¿de qué estamos hablando?, ¿qué entendemos por calidad de servicio?, ¿cuáles son los aspectos a tener en cuenta en las valoraciones?, ¿qué elementos tenemos en cuenta? etc. En esta comunicación se pretende hacer una presentación que ayude dar respuesta a las dudas y a esclarecer conceptos, en definitiva una contribución para potenciar la implantación de la cultura de la calidad en el sector bibliotecario.
Spatiotemporal vortex solitons in hexagonal arrays of waveguides
Creators: name: Leblond, H.
name: Malomed, B. A.
name: Mihalache, D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: By means of a systematic numerical analysis, we demonstrate that hexagonal lattices of parallel linearly-coupled waveguides, with the intrinsic cubic self-focusing nonlinearity, give rise to three species of stable semi-discrete complexes (which are continuous in the longitudinal direction), with embedded vorticity S: triangular modes with S=1, hexagonal ones with S=2, both centered around an empty central core, and compact triangles with S=1, which do not not include the empty site. Collisions between stable triangular vortices are studied too. These waveguiding lattices can be realized in optics and BEC.
description: 10 pages, 14 figures
What Are Education Students’ Perceptions of the Role of Technology in Social Studies Pedagogy?
Creators: name: Gibson, Susan
name: Moline, Teddy
name: Dyck, Brenda
Publisher: name: Alberta Journal of Educational Research
Year: 2011

description: Preservice teachers need both awareness of and skill with the latest digital technologies in order to use these tools effectively in their teaching. Historically in our university, this preparation has been reserved for a stand-alone information technology course focused on learning how to use various computer-based programs. However, more direct experience in subject-specific pedagogy courses is necessary to develop a deeper understanding about how a technology-rich environment can help to develop subject-specific knowledge. The study reported here examined the influences of two technology-infused social studies pedagogy courses on students’ perceptions about why, when, and how most effectively to infuse technology in their teaching of social studies and their feelings of preparedness to use those technologies. Les stagiaires doivent être au courant des technologies numériques et ils doivent savoir s'en servir de sorte à les intégrer efficacement à leur enseignement. Dans notre université, cette préparation a toujours été offerte dans le contexte d'un cours autonome portant sur la technologie de l'information et l'emploi de divers programmes informatiques. Toutefois, il faut avoir plus d'expériences directes dans des cours de pédagogie disciplinaires afin de pouvoir mieux tirer profit d'un milieu riche sur le plan informatique dans le développement de connaissances spécifiques aux disciplines. Cet article décrit une étude portant sur deux cours de pédagogie hautement informatisés et ayant trait aux études sociales. On a examiné, d'une part, les perceptions des étudiants quant à l'intégration efficace de la technologie dans leur enseignement des études sociales (pourquoi, quand et comment) et, d'autre part, la mesure dans laquelle ils se sentaient prêts à employer ces technologies.
description: Alberta Journal of Educational Research, Vol. 57 No. 1 (2011): Spring
Well posedness and limit theorems for a class of stochastic dyadic models
Creators: name: Luo, Dejun
name: Wang, Danli
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider stochastic inviscid dyadic models with energy-preserving noise. It is shown that the models admit weak solutions which are unique in law. Under a certain scaling limit of the noise, the stochastic models converge weakly to a deterministic viscous dyadic model, for which we provide explicit convergence rates in terms of the parameters of noise. A central limit theorem underlying such scaling limit is also established. In case that the stochastic dyadic model is viscous, we show the phenomenon of dissipation enhancement for suitably chosen noise.
description: 35 pages
Bibliotecas, Profesionales de la información y nuevos retos
Creators: name: Taladriz Mas, Margarita
Publisher: name: Digital.CSIC
Year: 2012
Subjects: Bibliotecarios
Profesionales de la Información

description: Los profesionales de la información creen que tendrán un carácter híbrido, no estrictamente documental Los perfiles se modificarán, pero el colectivo seguirá considerándose como profesionales de la información  Los espacios, servicios y recursos presenciales convivirán con los telemáticos La inclusión de elementos de la Web social, como catálogos participativos, La presencia en redes, los servicios para dispositivos móviles y la descarga de libros electrónicos son servicios con amplio consenso Los profesionales de la información serán formadores en el acceso y uso de la información.
The effect of the regular solution model in the condensation of protoplanetary dust
Creators: name: Pignatale, Francesco C.
name: Maddison, Sarah T.
name: Taquet, Vianney
name: Brooks, Geoffrey
name: Liffman, Kurt
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We utilize a chemical equilibrium code in order to study the condensation process which occurs in protoplanetary discs during the formation of the first solids. The model specifically focuses on the thermodynamic behaviour on the solid species assuming the regular solution model. For each solution, we establish the relationship between the activity of the species, the composition and the temperature using experimental data from the literature. We then apply the Gibbs free energy minimization method and study the resulting condensation sequence for a range of temperatures and pressures within a protoplanetary disc. Our results using the regular solution model show that grains condense over a large temperature range and therefore throughout a large portion of the disc. In the high temperature region (T > 1400 K) Ca-Al compounds dominate and the formation of corundum is sensitive to the pressure. The mid-temperature region is dominated by Fe(s) and silicates such as Mg2SiO4 and MgSiO3 . The chemistry of forsterite and enstatite are strictly related, and our simulations show a sequence of forsterite-enstatite-forsterite with decreasing temperature. In the low temperature regions (T < 600 K) a range of iron compounds and sulfides form. We also run simulations using the ideal solution model and see clear differences in the resulting condensation sequences with changing solution model In particular, we find that the turning point in which forsterite replaces enstatite in the low temperature region is sensitive to the solution model. Our results show that the ideal solution model is often a poor approximation to experimental data at most temperatures important in protoplanetary discs. We find some important differences in the resulting condensation sequences when using the regular solution model, and suggest that this model should provide a more realistic condensation sequence.
description: MNRAS: Accepted 2011 February 16. Received 2011 February 14; in original form 2010 July 22
title: ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸Ñ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð°ÑÑÑÐµÐ½Ð¸ÑÐ° Ð² Ð±ÐµÐ¹Ð½Ð¸ÑÐ½ÑÑ ÑÑÐ°Ð»ÑÑ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Determination of the retained austenite content in bainitic steels
Creators: name: ÐÐ°Ð½ÑÐµÐ²Ð°, ÐÐ°ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¿Ð½Ð¿-ÑÑÐ°Ð»Ð¸
Ð±ÐµÐ¹Ð½Ð¸Ñ
Ð¾ÑÑÐ°ÑÐ¾ÑÐ½ÑÐ¹ Ð°ÑÑÑÐµÐ½Ð¸Ñ
ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾ÑÑÑÑÐºÑÑÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð·
ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²ÐµÐ½Ð½ÑÐ¹ ÑÐ°Ð·Ð¾Ð²ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð·
PNP-steels
bainite
retained austenite
X-ray structural analysis
quantitative phase analysis

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ð° ÑÐµÐ¾ÑÐ¸Ñ Ð¿Ð¾ ÑÐµÐ¼Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð°ÑÑÑÐµÐ½Ð¸ÑÐ° Ð² ÑÑÑÑÐºÑÑÑÐµ ÑÑÐ°Ð»ÐµÐ¹ Ð½Ð° Ð¸Ñ Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð°. ÐÐ°Ð½Ñ Ð¾Ð±ÑÐ¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ñ Ð¸ ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ñ Ð±ÐµÐ¹Ð½Ð¸ÑÐ½ÑÑ ÑÑÑÑÐºÑÑÑ. ÐÐ¿Ð¸ÑÐ°Ð½ ÑÐµÐ°Ð»Ð¸Ð·Ð¾Ð²Ð°Ð½Ð½ÑÐ¹ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½Ñ Ð¿Ð¾ Ð¿Ð¾Ð¸ÑÐºÑ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð°ÑÑÑÐµÐ½Ð¸ÑÐ° Ð² Ð½Ð¸Ð·ÐºÐ¾ÑÐ³Ð»ÐµÑÐ¾Ð´Ð¸ÑÑÐ¾Ð¹ Ð½Ð¸Ð·ÐºÐ¾Ð»ÐµÐ³Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð¹ ÑÐµÑÑÐ¸ÑÐ½Ð¾-Ð±ÐµÐ¹Ð½Ð¸ÑÐ½Ð¾Ð¹ ÑÑÐ°Ð»Ð¸ ÐºÐ»Ð°ÑÑÐ° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ Ð60 Ð½Ð° ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾Ð²ÑÐºÐ¾Ð¼ Ð´Ð¸ÑÑÐ°ÐºÑÐ¾Ð¼ÐµÑÑÐµ. ÐÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ ÑÐ°ÑÑÐµÑ Ð¾Ð±ÑÐµÐ¼Ð½ÑÑ Ð´Ð¾Ð»ÐµÐ¹ Ð¾ÑÑÐ°ÑÐ¾ÑÐ½Ð¾Ð³Ð¾ Ð°ÑÑÑÐµÐ½Ð¸ÑÐ° Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÑÐµÐ½ÑÐ³ÐµÐ½Ð¾Ð²ÑÐºÐ¾Ð³Ð¾ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ°Ð·Ð¾Ð²Ð¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð°.
description: This article presents a theory of the influence of retained austenite in the structure of steels on their mechanical properties. Also, the work outlines the general concepts and classification of bainitic structures. A realized experiment on the search for retained austenite in low-carbon low-alloy ferritic-bainitic steel of strength class K60 on an X-ray diffractometer is described. The volume fraction of retained austenite was calculated by quantitative X-ray phase analysis.
Quantum control of $^{88}$Sr$^+$ in a miniature linear Paul trap
Creators: name: Akerman, Nitzan
name: Kotler, Shlomi
name: Glickman, Yinnon
name: Keselman, Anna
name: Ozeri, Roee
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the construction and characterization of an apparatus for quantum information experiments using $^{88}$Sr$^+$ ions. A miniature linear radio-frequency (rf) Paul trap was designed and built. Trap frequencies above 1 MHz in all directions are obtained with 50 V on the trap end-caps and less than 1 W of rf power. We encode a quantum bit (qubit) in the two spin states of the $S_{1/2}$ electronic ground-state of the ion. We constructed all the necessary laser sources for laser cooling and full coherent manipulation of the ions' external and internal states. Oscillating magnetic fields are used for coherent spin rotations. High-fidelity readout as well as a coherence time of 2.5 ms are demonstrated. Following resolved sideband cooling the average axial vibrational quanta of a single trapped ion is $\bar n=0.05$ and a heating rate of $\dot{\bar n}=0.016$ ms$^{-1}$ is measured.
description: 8 pages,9 figures
Nuevas formas de gestión de las colecciones en las bibliotecas científicas
Creators: name: Santos Aramburo, Ana
Publisher: name: Digital.CSIC
Year: 2012
Subjects: Gestión de Bibliotecas
Bibliotecas Universitarias

description: Resulta evidente que la gestión de las colecciones de las bibliotecas de instituciones dedicadas a la investigación es, en este momento, uno de los mayores retos al que deben enfrentarse este tipo de bibliotecas, como protagonistas estratégicos en estas instituciones. Los cambios producidos con la aparición del soporte digital afectan, mas que a otro tipo de colección, a las colecciones científicas que deben mantener un equilibrio con las líneas de investigación de la institución y asegurar cada año el suministro de la información científica relevante, con la obligación de rendir resultados, en una situación de evidente recorte presupuestario. El modelo seguido hasta este momento resulta difícil de mantener en las actuales circunstancias y han sido muchas las voces, dentro de la comunidad bibliotecaria y científica, que piden soluciones alternativas. Para obtener una panorámica de la situación se dará una visión general de los cambios producidos en los últimos años en cuanto a la forma de adquisición de las colecciones y como se ha visto modificada su gestión y utilización generando un nuevo entorno, que obliga a las bibliotecas a una necesaria búsqueda de alternativas encaminadas a un cambio de tendencia en la gestión de las colecciones científicas
title: ÐÐ¾Ð²ÑÑÐµÐ½Ð¸Ðµ ÐºÐ°ÑÐµÑÑÐ²Ð° Ð¸ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´Ð¸ÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð² Ð¾Ð¿Ð¾ÑÑ Ð³Ð¸Ð´ÑÐ¾Ð·Ð°ÑÐ¸ÑÑ Ð½ÐµÑÑÑÐ½Ð¾Ð³Ð¾ Ð½Ð°ÑÐ¾ÑÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ° Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ 15.04.05 - ÐÐ¾Ð½ÑÑÑÑÐºÑÐ¾ÑÑÐºÐ¾-ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÐ½ÑÑ Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ² ; 15.04.05_01 - Ð¢ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ Ð¼Ð°ÑÐ¸Ð½Ð¾ÑÑÑÐ¾ÐµÐ½Ð¸Ñ
titleType: Subtitle
Creators: name: ÐÐ¸ÑÑÐº, ÐÐ»ÐµÐºÑÐ°Ð½Ð´Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: ÐÐ°Ð·ÐµÑÐ½Ð°Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
Ð³Ð¸Ð´ÑÐ¾Ð·Ð°ÑÐ¸ÑÐ°
Ð³Ð¸Ð´ÑÐ¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÑÐµÑÐºÐ°Ñ Ð¾ÑÐµÐ²Ð°Ñ Ð¾Ð¿Ð¾ÑÐ° Ñ ÑÐ°Ð¼Ð¾ÑÑÑÐ°Ð½Ð°Ð²Ð»Ð¸Ð²Ð°ÑÑÐ¸Ð¼Ð¸ÑÑ ÑÐµÐ³Ð¼ÐµÐ½ÑÐ°Ð¼Ð¸
ÑÐ²ÐµÑÐ´ÑÐ¹ ÑÐ¿Ð»Ð°Ð²
Ð¿Ð°Ð¹ÐºÐ°
ÑÐ¿Ð¸ÑÐ°Ð»ÑÐ½ÑÐµ ÑÐ¾ÑÑÐµÐ²ÑÐµ ÐºÐ°Ð½Ð°Ð²ÐºÐ¸
Ð»Ð°Ð·ÐµÑÐ½Ð°Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ°
ÑÑÑÐ°Ð½Ð¾Ð²Ð¾ÑÐ½Ð¾-Ð·Ð°Ð¶Ð¸Ð¼Ð½Ð¾Ðµ Ð¿ÑÐ¸ÑÐ¿Ð¾ÑÐ¾Ð±Ð»ÐµÐ½Ð¸Ðµ

description: Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ Ð¾ÑÐµÐ²Ð¾Ð¹ Ð¾Ð¿Ð¾ÑÑ Ð³Ð¸Ð´ÑÐ¾Ð·Ð°ÑÐ¸ÑÑ Ð½ÐµÑÑÑÐ½Ð¾Ð³Ð¾ Ð½Ð°ÑÐ¾ÑÐ°. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð° ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ ÑÐ·Ð»Ð°, Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿ ÐµÐ³Ð¾ ÑÐ°Ð±Ð¾ÑÑ. ÐÐ¿Ð¸ÑÐ°Ð½Ñ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ðµ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ¾Ð² Ð¿Ð¾ Ð¿Ð°Ð¹ÐºÐµ Ð¸ Ð»Ð°Ð·ÐµÑÐ½Ð¾Ð¹ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÐ²ÐµÑÐ´Ð¾Ð³Ð¾ ÑÐ¿Ð»Ð°Ð²Ð°. Ð¡Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¿ÑÐ¾ÑÐµÑÑ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ¾Ð² Ð¾ÑÐµÐ²Ð¾Ð¹ Ð¾Ð¿Ð¾ÑÑ, ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð¾ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ðµ ÑÑÑÐ°Ð½Ð¾Ð²Ð¾ÑÐ½Ð¾-Ð·Ð°Ð¶Ð¸Ð¼Ð½Ð¾Ðµ Ð¿ÑÐ¸ÑÐ¿Ð¾ÑÐ¾Ð±Ð»ÐµÐ½Ð¸Ðµ.
description: In the given work the manufacturing process for thrust bearing of the seal section of electric submersible pump is stated. The design and the operating principle of this joint are considered. The performance and the results of hard alloy soldering
and laser machining are described. The manufacturing process for thrust bearing is designed, the automated fixing device is developed.
Cooper pairing and finite-size effects in a NJL-type four-fermion model
Creators: name: Ebert, D.
name: Klimenko, K. G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting from a NJL-type model with N fermion species fermion and difermion condensates and their associated phase structures are considered at nonzero chemical potential $μ$ and zero temperature in spaces with nontrivial topology of the form $S^1\otimes S^1\otimes S^1$ and $R^2\otimes S^1$. Special attention is devoted to the generation of the superconducting phase. In particular, for the cases of antiperiodic and periodic boundary conditions we have found that the critical curve of the phase transitions between the chiral symmetry breaking and superconducting phases as well as the corresponding condensates and particle densities strongly oscillate vs $λ\sim 1/L$, where $L$ is the length of the circumference $S^1$. Moreover, it is shown that at some finite values of $L$ the superconducting phase transition is shifted to smaller values both of $μ$ and particle density in comparison with the case of $L=\infty$.
description: 13 pages, 13 figures; minor changes; new references added; version accepted to PRD
Molecular influence on nuclear-quadrupole coupling effects in laser induced alignment
Creators: name: Thesing, Linda
name: Yachmenev, Andrey
name: González-Férez, Rosario
name: Küpper, Jochen
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2024

description: We studied the effect of nuclear-quadrupole interactions on the field-free impulsive alignment of different asymmetric-top molecules. Our analysis is focused on the influence of the hyperfine- and rotational-energy-level structures. These depend on the number of nuclear spins, the rotational constants, and the symmetry of the tensors involved in the nuclear spin and external field interactions. Comparing the prototypical large-nuclear- spin molecules iodobenzene, 1,2-diiodobenzene, 1,3-diiodobenzene, and 2,5-diiodobenzonitrile, we demonstrate that the magnitude of the hyperfine splittings compared to the rotational-energy splittings plays a crucial role in the spin-rotational dynamics after the laser pulse. Moreover, we point out that the impact of the quadrupole coupling on the rotational dynamics decreases when highly excited rotational states dominate the dynamics.
Inferring Biologically Relevant Models: Nested Canalyzing Functions
Creators: name: Hinkelmann, Franziska
name: Jarrah, Abdul Salam
Publisher: name: arXiv
Year: 2010
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: Inferring dynamic biochemical networks is one of the main challenges in systems biology. Given experimental data, the objective is to identify the rules of interaction among the different entities of the network. However, the number of possible models fitting the available data is huge and identifying a biologically relevant model is of great interest. Nested canalyzing functions, where variables in a given order dominate the function, have recently been proposed as a framework for modeling gene regulatory networks. Previously we described this class of functions as an algebraic toric variety. In this paper, we present an algorithm that identifies all nested canalyzing models that fit the given data. We demonstrate our methods using a well-known Boolean model of the cell cycle in budding yeast.
Kaehler geometry of black holes and gravitational instantons
Creators: name: Aksteiner, Steffen
name: Araneda, Bernardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain a closed formula for the Kaehler potential of a broad class of four-dimensional Lorentzian or Euclidean conformal "Kaehler" geometries, including the Plebanski-Demianski class and various gravitational instantons such as Fubini-Study and Chen-Teo. We show that the Kaehler potentials of Schwarzschild and Kerr are related by a Newman-Janis shift. Our method also shows that a class of supergravity black holes, including the Kerr-Sen spacetime, is Hermitian (but not conformal Kaehler). We finally show that the integrability conditions of complex structures lead naturally to the (non-linear) Weyl double copy, and we give new vacuum and non-vacuum examples of this relation.
description: 6 pages
Positive Ground State Solutions to a Nonlocal Singular Elliptic Problem
Creators: name: Avci, Mustafa
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J40, 35J60, 35J70

description: In the present paper, we study the existence and uniqueness of solutions to some nonlocal singular elliptic problem under Dirichlet boundary condition. Problem is settled in Musielak-Sobolev spaces.
Imperfect Dark Energy from Kinetic Gravity Braiding
Creators: name: Deffayet, Cedric
name: Pujolas, Oriol
name: Sawicki, Ignacy
name: Vikman, Alexander
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
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 introduce a large class of scalar-tensor models with interactions containing the second derivatives of the scalar field but not leading to additional degrees of freedom. These models exhibit peculiar features, such as an essential mixing of scalar and tensor kinetic terms, which we have named kinetic braiding. This braiding causes the scalar stress tensor to deviate from the perfect-fluid form. Cosmology in these models possesses a rich phenomenology, even in the limit where the scalar is an exact Goldstone boson. Generically, there are attractor solutions where the scalar monitors the behaviour of external matter. Because of the kinetic braiding, the position of the attractor depends both on the form of the Lagrangian and on the external energy density. The late-time asymptotic of these cosmologies is a de Sitter state. The scalar can exhibit phantom behaviour and is able to cross the phantom divide with neither ghosts nor gradient instabilities. These features provide a new class of models for Dark Energy. As an example, we study in detail a simple one-parameter model. The possible observational signatures of this model include a sizeable Early Dark Energy and a specific equation of state evolving into the final de-Sitter state from a healthy phantom regime.
description: 41 pages, 7 figures. References and some clarifying language added. This version was accepted for publication in JCAP