cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Islands and mixed states in closed universes
Creators: name: Fallows, Seamus
name: Ross, Simon F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the appearance of islands when a closed universe with gravity is entangled with a non-gravitating quantum system. We use braneworlds in three-dimensional multiboundary wormhole geometries as a model to explore what happens when the non-gravitating system has several components. The braneworld can be either completely contained in the entanglement wedge of one of the non-gravitating systems or split between them. In the former case, entanglement with the other system leads to a mixed state in the closed universe, unlike in simpler setups with a single quantum system, where the closed universe was necessarily in a pure state. We show that the entropy of this mixed state is bounded by half of the coarse-grained entropy of the effective theory on the braneworld.
description: 21 pages, v2: reference added, v3: clarifying comments added in response to referee report
Bilateral Control-Based Imitation Learning for Velocity-Controlled Robot
Creators: name: Sakaino, Sho
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Machine learning is now playing important role in robotic object manipulation. In addition, force control is necessary for manipulating various objects to achieve robustness against perturbations of configurations and stiffness. The author's group revealed that fast and dynamic object manipulation with force control can be obtained by bilateral control-based imitation learning. However, the method is applicable only in robots that can control torque, while it is not applicable in robots that can only follow position or velocity commands like many commercially available robots. Then, in this research, a way to implement bilateral control-based imitation learning to velocity-controlled robots is proposed. The validity of the proposed method is experimentally verified by a mopping task.
description: 6pages, 10 figures, submitted for ISIE2021
Exact results for state-to-state transition probabilities in the multistate Landau-Zener model by non-stationary perturbation theory
Creators: name: Volkov, M. V.
name: Ostrovsky, V. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Multistate generalizations of Landau-Zener model are studied by summing entire series of perturbation theory. A new technique for analysis of the series is developed. Analytical expressions for probabilities of survival at the diabatic potential curves with extreme slope are proved. Degenerate situations are considered when there are several potential curves with extreme slope. New expressions for some state-to-state transition probabilities are derived in degenerate cases.
description: 21 pages, 0 figures
Postnatal experiences of North Shore women
Creators: name: Erickson, Debra Lynn
Publisher: name: University of British Columbia
Year: 2008

description: This study explores and identifies the needs of North Shore women during their postpartum period (0-3 months). In order to compare the perspective of the service users and the professional care givers, data were collected from three groups: new mothers, community health nurses and hospital maternity nurses. Discussions resulting from eight focus group interviews were the primary source of information for this exploratory study. Six groups of mothers, one group of community health nurses and one group of hospital nurses participated in the focus group discussions. The total number of participants were thirty-three mothers, eight community health nurses and six hospital nurses. Content analysis of the qualitative data identified three themes: 1) lack of knowledge, 2) role confusion and/or role redefinition, and 3) lifestyle adjustments. Each theme was examined within the context of three developmental time periods: the first week, 1 week to 6 weeks, and 6 weeks to three months. The data indicated that women were concerned with six tasks during their postnatal period: breast-feeding, infant care, maternal care, maintaining their spousal relationship, sibling care and household care. The relationship of each task to each theme was considered in each time period. In addition to the themes and tasks identified, the focus groups revealed that assistance and emotional support from spouses, other family members and friends is one of the most important components in the maternal recovery and adjustment process. The overall findings of the study indicate that during their postnatal period the mothers needed information, support and validation to assist them in adapting to their role as parents. The results of this study have implications for health care service providers, agencies and organizations providing services and resources to women and their families, and for the family and friends of new mothers.
The dust mass in Cassiopeia A from infrared and optical line flux differences
Creators: name: Niculescu-Duvaz, Maria
name: Barlow, Michael J.
name: Bevan, Antonia
name: Milisavljevic, Danny
name: De Looze, Ilse
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The large quantities of dust that have been found in a number of high redshift galaxies have led to suggestions that core-collapse supernovae (CCSNe) are the main sources of their dust and have motivated the measurement of the dust masses formed by local CCSNe. For Cassiopeia~A, an oxygen-rich remnant of a Type~IIb CCSN, a dust mass of 0.6-1.1~M$_\odot$ has already been determined by two different methods, namely (a) from its far-infrared spectral energy distribution and (b) from analysis of the red-blue emission line asymmetries in its integrated optical spectrum. We present a third, independent, method for determining the mass of dust contained within Cas~A. This compares the relative fluxes measured in similar apertures from [O~{\sc iii}] far-infrared and visual-region emission lines, taking into account foreground dust extinction, in order to determine internal dust optical depths, from which corresponding dust masses can be obtained. Using this method we determine a dust mass within Cas~A of at least 0.99$^{+0.10}_{-0.09}$~M$_\odot$.
description: Accepted by MNRAS, 17 pages, 12 figures. Author accepted manuscript. Accepted on 21/03/2021. Deposited on 22/03/2021
Derivation of amplitudes for [pi] - 2[pi] reaction channels using the oset-vicente-vacas model, and calculation of the chiral symmetry breaking parameter
Creators: name: Fazel, Neil Behzad
Publisher: name: University of British Columbia
Year: 2008

description: The Oset and Vicente-Vacas model for π N --> π πN reaction has ben used to derive theoretical values of the amplitudes and cross sections for the π - 2π reaction channels. It is shown that the N* --> N(π π)s—wave mechanism is required in order to obtain agreement with the world data for the π-ρ --> π-π+ and π-ρ ---> π0 π0 n channels. The x2 analyses of the world data near threshold for all the channels strongly support the Weinberg's value of Ƹ = 0 for the chiral symmetry breaking parameter. The value of C, the factor related to N*Nπ π coupling through the exchange of the scalar meson ε, was estimated to be C = (-1.97 + 0.11) μ-1.
Unparticle Physics
Creators: name: Georgi, Howard
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss some simple aspects of the low-energy physics of a nontrivial scale invariant sector of an effective field theory -- physics that cannot be described in terms of particles. I argue that it is important to take seriously the possibility that the unparticle stuff described by such a theory might actually exist in our world. I suggest a scenario in which some details of the production of unparticle stuff can be calculated. I find that in the appropriate low energy limit, unparticle stuff with scale dimension $d_{\mathcal{U}}$ looks like a non-integral number $d_{\mathcal{U}}$ of invisible particles. Thus dramatic evidence for a nontrivial scale invariant sector could show up experimentally in missing energy distributions.
description: 9 pages, 1 figure - more references and minor wording changes in v3
Discussion on the recent proton-DVCS results of Jefferson Lab
Creators: name: Guidal, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the recent data issued from the Halls A and B of Jefferson Laboratory for the Deep Virtual Compton Scattering Process on the proton. An important set of data for beam spin asymmetries, unpolarized cross sections and differences of polarized cross sections have been obtained. We modestly attempt a first "global" analysis of these three observables at a single $$, $$ and $$ kinematic point. We find that it is extremely challenging to describe simultaneously these data in the framework of a few Generalized Parton Distributions models.
description: proceeding of the Photon2007 conference (International Conference on the Structure and Interactions of the Photon, Paris 9-13 July 2007)
Magnetic friction due to vortex fluctuation
Creators: name: Dias, R. A.
name: Rapini, M.
name: Coura, P. Z.
name: Costa, B. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We use Monte Carlo and molecular dynamics simulation to study a magnetic tip-sample interaction. Our interest is to understand the mechanism of heat dissipation when the forces involved in the system are magnetic in essence. We consider a magnetic crystalline substrate composed of several layers interacting magnetically with a tip. The set is put thermally in equilibrium at temperature T by using a numerical Monte Carlo technique. By using that configuration we study its dynamical evolution by integrating numerically the equations of motion. Our results suggests that the heat dissipation in this system is closed related to the appearing of vortices in the sample.
description: 6 pages, 41 figures
Differential Equations for Algebraic Functions
Creators: name: Bostan, Alin
name: Chyzak, Frédéric
name: Salvy, Bruno
name: Lecerf, Grégoire
name: Schost, Éric
Publisher: name: arXiv
Year: 2007
Subjects: subject: Symbolic Computation (cs.SC)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: It is classical that univariate algebraic functions satisfy linear differential equations with polynomial coefficients. Linear recurrences follow for the coefficients of their power series expansions. We show that the linear differential equation of minimal order has coefficients whose degree is cubic in the degree of the function. We also show that there exists a linear differential equation of order linear in the degree whose coefficients are only of quadratic degree. Furthermore, we prove the existence of recurrences of order and degree close to optimal. We study the complexity of computing these differential equations and recurrences. We deduce a fast algorithm for the expansion of algebraic series.
La controversia storiografica sulle glottotecnologie
Creators: name: Torsani, Simone
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description:

History plays an important role in research on Computer Assisted Language Learn- ing (CALL) as it can help researchers better define a composite field in which the connection between technology and pedagogy has never been either clear or easy. Yet, despite CALL be- ing a rather recent field of investigation and work, accounts of its historical development vary among authors, especially as regards the so-called interpretative histories, which sketch the field's evolution by identifying and characterising broad historical phases. This paper aims at describing such controversy and compare the various accounts so as to highlight the different interpretations of the field which underpin each of them. A new history will be proposed in the end based on the field's development in the last decades which posits that network technologies may be able to reconcile CALL with Second Language Acquisition research.

description: EL.LE
Formazione on line dei docenti di lingue
Creators: name: Celentin, Paola
name: Luise, Maria Cecilia
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description: The online training language teacher courses challenge requires knowledge and methodological competence that teacher trainers have constantly to debate in order to reach an affective result. This essay aims to point out not just the needs and the expectations of the language teachers during their training, but also those answers that Web could give. Then, the study is developed either on language teachers training, or on online and blended training cours- es; at this moment the study aims to highlight some techniques and some education tools used online that have resulted very successful thank to their metacognitive and reflective properties.
description: EL.LE
Semantic-Driven Topic Modeling Using Transformer-Based Embeddings and Clustering Algorithms
Creators: name: Mersha, Melkamu Abay
name: yigezu, Mesay Gemeda
name: Kalita, Jugal
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Topic modeling is a powerful technique to discover hidden topics and patterns within a collection of documents without prior knowledge. Traditional topic modeling and clustering-based techniques encounter challenges in capturing contextual semantic information. This study introduces an innovative end-to-end semantic-driven topic modeling technique for the topic extraction process, utilizing advanced word and document embeddings combined with a powerful clustering algorithm. This semantic-driven approach represents a significant advancement in topic modeling methodologies. It leverages contextual semantic information to extract coherent and meaningful topics. Specifically, our model generates document embeddings using pre-trained transformer-based language models, reduces the dimensions of the embeddings, clusters the embeddings based on semantic similarity, and generates coherent topics for each cluster. Compared to ChatGPT and traditional topic modeling algorithms, our model provides more coherent and meaningful topics.
Identification and validation of a cellular senescence-related lncRNA signature for prognostic prediction in patients with multiple myeloma
Creators: name: Zeng, Tanlun
name: Jiang, Sihan
name: Wang, Yichuan
name: Sun, Guanqun
name: Cao, Jinjin
name: Hu, Dingtao
name: Wang, Guang
name: Liang, Xijun
name: Ding, Jin
name: Du, Juan
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Cancer
subject: Hematology
subject: Computational Biology

description: Multiple myeloma (MM) is the second most common hematologic malignancy, which primarily occurs in the elderly. Cellular senescence is considered to be closely associated with the occurrence and progression of malignant tumors including MM, and lncRNA can mediate the process of cellular senescence by regulating key signaling pathways such as p53/p21 and p16/RB. However, the role of cellular senescence related lncRNAs (CSRLs) in MM development has never been reported. Herein, we identified 11 CSRLs (AC004918.5, AC103858.1, AC245100.4, ACBD3-AS1, AL441992.2, ATP2A1-AS1, CCDC18-AS1, LINC00996, TMEM161B-AS1, RP11-706O15.1, and SMURF2P1) to build the CSRLs risk model, which was confirmed to be highly associated with overall survival (OS) of MM patients. We further demonstrated the strong prognostic value of the risk model in MM patients receiving different regimens, especially for those with three-drug combination of bortezomib, lenalidomide, and dexamethasone (VRd) as first-line therapy. Not only that, our risk model also excels in predicting the OS of MM patients at 1, 2, and 3 years. In order to verify the function of these CSRLs in MM, we selected the lncRNA ATP2A1-AS1 which presented the largest expression difference between high-risk groups and low-risk groups for subsequent analysis and validation. Finally, we found that down-regulation of ATP2A1-AS1 can promote cellular senescence in MM cell lines. In conclusion, the CSRLs risk model established in present study provides a novel and more accurate method for predicting MM patients’ prognosis and identifies a new target for MM therapeutic intervention.
Heavy neutrino signals at large hadron colliders
Creators: name: del Aguila, F.
name: Aguilar-Saavedra, J. A.
name: Pittau, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the LHC discovery potential for heavy Majorana neutrino singlets in the process pp -> W+ -> l+ N -> l+ l+ jj (l=e,mu) plus its charge conjugate. With a fast detector simulation we show that backgrounds involving two like-sign charged leptons are not negligible and, moreover, they cannot be eliminated with simple sequential kinematical cuts. Using a likelihood analysis it is shown that, for heavy neutrinos coupling only to the muon, LHC has 5 sigma sensitivity for masses up to 200 GeV in the final state mu+- mu+- jj. This reduction in sensitivity, compared to previous parton-level estimates, is driven by the ~ 10^2-10^3 times larger background. Limits are also provided for e+- e+- jj and e+- mu+- jj final states, as well as for Tevatron. For heavy Dirac neutrinos the prospects are worse because backgrounds involving two opposite charge leptons are much larger. For this case, we study the observability of the lepton flavour violating signal e+- mu-+ jj. As a by-product of our analysis, heavy neutrino production has been implemented within the ALPGEN framework.
description: Latex 36 pages, 49 PS figures. Major extension incorporating analysis for e+- e+-, e+- mu+- and e+- mu-+ final states. Final version to appear in JHEP
Moire Superlattice Modulations in Single-Unit-Cell FeTe Films Grown on NbSe2 Single Crystals
Creators: name: Deng, Han-Bin
name: Li, Yuan
name: Feng, Zili
name: Guan, Jian-Yu
name: Yu1, Xin
name: Huang, Xiong
name: Liu, Rui-Zhe
name: Zhu, Chang-Jiang
name: Liu, Limin
name: Sun, Ying-Kai
name: Peng, Xi-liang
name: Li, Shuai-Shuai
name: Du, Xin
name: Wang, Zheng
name: Wu, Rui
name: Yin, Jia-Xin
name: Shi, You-Guo
name: Mao, Han-Qing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Interface can be a fertile ground for exotic quantum states, including topological superconductivity, Majorana mode, fractal quantum Hall effect, unconventional superconductivity, Mott insulator, etc. Here we grow single-unit-cell (1UC) FeTe film on NbSe2 single crystal by molecular beam epitaxy (MBE) and investigate the film in-situ with home-made cryogenic scanning tunneling microscopy (STM) and non-contact atomic force microscopy (AFM) combined system. We find different stripe-like superlattice modulations on grown FeTe film with different misorientation angles with respect to NbSe2 substrate. We show that these stripe-like superlattice modulations can be understood as moire pattern forming between FeTe film and NbSe2 substrate. Our results indicate that the interface between FeTe and NbSe2 is atomically sharp. By STM-AFM combined measurement, we suggest the moire superlattice modulations have an electronic origin when the misorientation angle is relatively small (<= 3 degree) and have structural relaxation when the misorientation angle is relatively large (>= 10 degree).
description: 10 pages, 4 figures
Determining the maximum information gain and optimising experimental design in neutron reflectometry using the Fisher information
Creators: name: Durant, James H.
name: Wilkins, Lucas
name: Butler, Keith
name: Cooper, Joshaniel F. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: An approach based on the Fisher information (FI) is developed to quantify the maximum information gain and optimal experimental design in neutron reflectometry experiments. In these experiments, the FI can be analytically calculated and used to provide sub-second predictions of parameter uncertainties. This approach can be used to influence real-time decisions about measurement angle, measurement time, contrast choice and other experimental conditions based on parameters of interest. The FI provides a lower bound on parameter estimation uncertainties and these are shown to decrease with the square root of measurement time, providing useful information for the planning and scheduling of experimental work. As the FI is computationally inexpensive to calculate, it can be computed repeatedly during the course of an experiment, saving costly beam time by signalling that sufficient data has been obtained; or saving experimental datasets by signalling that an experiment needs to continue. The approach's predictions are validated through the introduction of an experiment simulation framework that incorporates instrument-specific incident flux profiles, and through the investigation of measuring the structural properties of a phospholipid bilayer.
description: Revised submission to the Journal of Applied Crystallography
The Effect of alpha' Corrections in String Gas Cosmology
Creators: name: Borunda, Monica
name: Boubekeur, Lotfi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the Brandenberger-Vafa scenario of string gas cosmology, the Universe starts as a small torus of string length dimension filled with a hot gas of strings. In such extreme conditions, in addition to the departure from Einstein gravity which is due to the dilaton, one expects higher curvature corrections to be relevant. Motivated by this fact, we study the effect of the leading alpha'^3 corrections in type IIB string theory for this scenario. Within the assumptions of: weak coupling, adiabatic evolution and thermodynamical equilibrium, we perturbatively solved the corresponding equations of motion in two different cases: (i) the isotropic case which is governed by a single scale factor and (ii) the anisotropic case given by two different scale factors. In the first case, we consider two regimes (ia) The Hagedorn regime where the string gas equation of state is that of pressureless dust, and (ib) the radiation regime. In the second case, (ii), we only considered a radiation-like equation of state. We found that the inclusion of alpha' corrections affects the scale factor(s) in opposite way in the Hagedorn and in the radiation regimes, acting as a driving force for the first one and a damping force for the second one. This effect is small for reasonable initial conditions and it is only observed at early times. Morever it is bigger in the Hagedorn regime than in the radiation regime. We also analyzed the fixed points of the system. We found that there exists a stable dS fixed point, which does not exist when the corrections are neglected.
description: 28 pages, 6 figures. Typos corrected. Reference added. Final version to appear in JCAP
Formazione online degli insegnanti di lingue via web-forum
Creators: name: Celentin, Paola
name: Da Rold, Marilena
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description:

We (Celentin e Da Rold 2004) have analysed the interaction between students in three web-forums of the Master Itals.1 This study was based on the model of content analysis proposed by Garrison, Anderson, Archer in Practical Inquiry Model (2001), which suggested to evaluate the knowledge building development in relation to variables of on-line teaching course. Our analysis stressed the role of tutors in on-line learning environments. Their chosen strategies are pedagogically of pivotal importance for the mind-set of learners. In particular, we noticed that tutors’ directions were extremely influential on the quality and typology of students’ reac- tion and knowledge building. Thus, we have reconsidered this prominent process. Focusing on the leading role of the tutor, we analysed his/her teaching methodologies with a view to note how a particular approach could enhance students’ competence more than another. We used Anderson, Garrison, Rourke and Archer, Assessing Teaching Presence in a computer conferenc- ing context (2001) as a base for our investigation, which is carried out on 2 web-forums of the Master Itals directed by two tutors - a female and a male - with different teaching approaches and style. The final aim of this research is to collect additional data on teaching and learning re- lationship. Any additional considerations and suggestions, which such a data may uncover, will help to sift through different methodologies and detect more effective ways to achieve learning aims and objectives by tutors who are engaged in web-forum teaching environments.

description: EL.LE
Direct Observation and Control of Surface Termination in Perovskite Oxide Heterostructures
Creators: name: Orvis, Thomas
name: Cao, Tengfei
name: Surendran, Mythili
name: Kumarasubramanian, Harish
name: Cunniff, Austin
name: Mishra, Rohan
name: Ravichandran, Jayakanth
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interfacial behavior of quantum materials leads to emergent phenomena such as two dimensional electron gases, quantum phase transitions, and metastable functional phases. Probes for in situ and real time surface sensitive characterization are critical for active monitoring and control of epitaxial synthesis, and hence the atomic-scale engineering of heterostructures and superlattices. Termination switching, especially as an interfacial process in ternary complex oxides, has been studied using a variety of probes, often ex situ; however, direct observation of this phenomena is lacking. To address this need, we establish in situ and real time reflection high energy electron diffraction and Auger electron spectroscopy for pulsed laser deposition, which provide structural and compositional information of the surface during film deposition. Using this unique capability, we show, for the first time, the direct observation and control of surface termination in complex oxide heterostructures of SrTiO3 and SrRuO3. Density-functional-theory calculations capture the energetics and stability of the observed structures and elucidate their electronic behavior. This demonstration opens up a novel approach to monitor and control the composition of materials at the atomic scale to enable next-generation heterostructures for control over emergent phenomena, as well as electronics, photonics, and energy applications.
description: 23 pages, 3 figures, submitted to ACS Nano Letters
La marginalità della cinesica nella manualistica dell’italiano L2
Creators: name: Giovannini, Michela
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description: Italian gestures are very important in teaching and learning Italian as a second language. Well-known Italian books for foreigners of different levels and publishing houses propose traditional teaching materials based on pictures and images to explain typical Italian gestures. Nevertheless, international and national studies have demonstrated the importance of Italian gestures for travelling, living and communicating in Italy. For this reason, in this article I will focus on how Italian gestures can be taught with innovative forms (i.e. video or movie) and how this process activates the speaker’s productive and receptive competence and improve his performance. However, I will specify the rule of communicative contexts and linguistic registers and I will propose a review of Italian gestures classification based on Common European Framework of Reference for Languages levels.
description: EL.LE
Decoy states for quantum key distribution based on decoherence-free subspaces
Creators: name: Yin, Zhen-Qiang
name: Zhao, Yi-Bo
name: Zhou, Zheng-Wei
name: Han, Zheng-Fu
name: Guo, Guang-Can
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum key distribution with decoherence-free subspaces has been proposed to overcome the collective noise to the polarization modes of photons flying in quantum channel. Prototype of this scheme have also been achieved with parametric-down conversion source. However, a novel type of photon-number-splitting attack we proposed in this paper will make the practical implementations of this scheme insecure since the parametric-down conversion source may emit multi-photon pairs occasionally. We propose decoy states method to make these implementations immune to this attack. And with this decoy states method, both the security distance and key bit rate will be increased.
description: 6 pages,1 figure
«Migliorare l’efficienza nell’apprendimento linguistico»
Creators: name: Balboni, Paolo
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description: In Italy the acronym Mass Online Open Course, MOOC, is still rather unknown, whilst in America and Northern Europe large consortia organize open online courses aimed at attracting students to member universities. The course this essay is not aimed at attracting students to Ca’ Foscari University but to help people become more efficient in language learning – students in schools, in universities, in continuing education programmes; migrants who leave Italy or come to it. The essay discusses the aim, the methodology and the contents of Meal, http://www.unive. it/meal.
description: EL.LE
Questionário semântico (cont.), Questionário semântico do Setor Lingüístico do Museu Nacional (PTLI)
Creators: name: Brandão, Militão
name: Vieira Cândido, Gláucia
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: swo

description: Lado A: do dado 526 ao 730. Lado B: do dado 731 ao 800; do dado 1 ao 40. Alguns dados dos informantes jovens.
Improved Generation of Synthetic Imaging Data Using Feature-Aligned Diffusion
Creators: name: Nair, Lakshmi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Synthetic data generation is an important application of machine learning in the field of medical imaging. While existing approaches have successfully applied fine-tuned diffusion models for synthesizing medical images, we explore potential improvements to this pipeline through feature-aligned diffusion. Our approach aligns intermediate features of the diffusion model to the output features of an expert, and our preliminary findings show an improvement of 9% in generation accuracy and ~0.12 in SSIM diversity. Our approach is also synergistic with existing methods, and easily integrated into diffusion training pipelines for improvements. We make our code available at \url{https://github.com/lnairGT/Feature-Aligned-Diffusion}.
description: Accepted to First International Workshop on Vision-Language Models for Biomedical Applications (VLM4Bio 2024) at the 32nd ACM-Multimedia conference
Didattica delle lingue corpus-based
Creators: name: Corino, Elisa
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description:

Competences required to a language teacher today go far beyond the simple knowledge of a foreign language, thus implying a proficient literacy in all the multiple aspects of the influence wielded by the web on the language itself, dealing with computer mediated communication, its emerging textual genres and the ongoing transformation of language related to the influence of technologies. In such a context being familiar with the tools offered by linguistic research is a priority for foreign language teachers, in order to observe, analyze and find new cues and opportunities for their didactics.

This contribution is aimed at presenting tools and activities, showing how corpora can intervene in language classroom practice, thus being actively used by both teachers and students.

description: EL.LE
Semiclassical dynamics and long time asymptotics of the central-spin problem in a quantum dot
Creators: name: Chen, Gang
name: Bergman, Doron L.
name: Balents, Leon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin of an electron trapped in a quantum dot is a promising candidate implementation of a qubit for quantum information processing. We study the central spin problem of the effect of the hyperfine interaction between such an electron and a large number of nuclear moments. Using a spin coherent path integral, we show that in this limit the electron spin evolution is well described by classical dynamics of both the nuclear and electron spins. We then introduce approximate yet systematic methods to analyze aspects of the classical dynamics, and discuss the importance of the exact integrability of the central spin Hamiltonian. This is compared with numerical simulation. Finally, we obtain the asymptotic long time decay of the electron spin polarization. We show that this is insensitive to integrability, and determined instead by the transfer of angular momentum to very weakly coupled spins far from the center of the quantum dot. The specific form of the decay is shown to depend sensitively on the form of the electronic wavefunction.
description: 13 pages, 4 figures, accepted by PRB
The role of adenylate cyclase in the regulation of competence development in haemophilus influenzae
Creators: name: Dorocicz, Irene Renate
Publisher: name: University of British Columbia
Year: 2008

description: To study the role of adenylate cyclase in competence development, a partial clone of the Haemophilus influenzae cya gene was isolated by complementation of a Acya Escherichia coli strain. Adenylate cyclase was believed to have a role in competence development because it catalyzes production of adenosine 3':5'-cyclic monophosphate (cAMP), a known regulator of competence. To prove that adenylate cyclase was essential for competence development, transposon mutagenesis was used to form the cya- H. influenzae strain RR668, with an insertion in the region of cya coding for the catalytic domain. Characterization of this mutant has shown that cya is an essential gene for spontaneous late log competence, and for competence induced by starvation conditions. The partial preliminary sequence of the cloned gene had significant amino acid homology to the cya genes from enteric bacteria and the more closely related bacterium Pasteurella multocida. Examination of the cya sequence also revealed a possible CRP binding site (with 55% homology to the consensus Escherichia coli site) located upstream of the putative start codon GTG. The presence of the presumptive CRP site indicated that H. influenzae, like other bacterial species, may regulate cAMP synthesis by CRP mediated feedback repression of transcription. If the start codon was correctly identified as GTG, then this is the first known bacterial cya gene to use GTG as a start codon instead of ATG or TTG.
Collisional decay of 87Rb Feshbach molecules at 1005.8 G
Creators: name: Syassen, N.
name: Volz, T.
name: Teichmann, S.
name: Dürr, S.
name: Rempe, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present measurements of the loss-rate coefficients K_am and K_mm caused by inelastic atom-molecule and molecule-molecule collisions. A thermal cloud of atomic 87Rb is prepared in an optical dipole trap. A magnetic field is ramped across the Feshbach resonance at 1007.4 G. This associates atom pairs to molecules. A measurement of the molecule loss at 1005.8 G yields K_am=2 10^-10 cm^3/s. Additionally, the atoms can be removed with blast light. In this case, the measured molecule loss yields K_mm=3 10^-10 cm^3/s.
Backward DVCS and Proton to Photon Transition Distribution Amplitudes
Creators: name: Lansberg, J. P.
name: Pire, B.
name: Szymanowski, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyse deeply-virtual Compton scattering on a proton target, gamma* P -> P' gamma in the backward region and in the scaling regime. We define the transition distribution amplitudes which describe the proton to photon transition. Model-independent predictions are given to test this description, for current or planned experiments at JLab or by Hermes.
description: 8 pages, 3 figures, LaTeX, uses espcrc1.sty (included). Invited talk at the Vth International Conference on Perspectives in Hadronic Physics, 22-26 May 2006, ICTP, Trieste, Italy
Non-supersymmetric Black Holes and Topological Strings
Creators: name: Saraikin, Kirill
name: Vafa, Cumrun
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study non-supersymmetric, extremal 4 dimensional black holes which arise upon compactification of type II superstrings on Calabi-Yau threefolds. We propose a generalization of the OSV conjecture for higher derivative corrections to the non-supersymmetric black hole entropy, in terms of the one parameter refinement of topological string introduced by Nekrasov. We also study the attractor mechanism for non-supersymmetric black holes and show how the inverse problem of fixing charges in terms of the attractor value of CY moduli can be explicitly solved.
description: 47 pages, harvmac. v2: footnote(4) expanded, references added
Additional file 4: of RNA-Seq and iTRAQ reveal multiple pathways involved in storage root formation and development in sweet potato (Ipomoea batatas L.)
Creators: name: Dong, Tingting
name: Zhu, Mingku
name: Yu, Jiawen
name: Han, Rongpeng
name: Tang, Cheng
name: Xu, Tao
name: Liu, Jingran
name: Li, Zongyun
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: Figure S2. GO analysis of four clusters in transcriptome. (PDF 219 kb)
Finite transverse conductance and anisotropic magnetoconductance under an applied in-plane magnetic field in two-dimensional electron gases with strong spin-orbit coupling
Creators: name: Soori, Abhiram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The current in response to a bias in certain two-dimensional electron gas (2DEG), can have a nonzero transverse component under a finite magnetic field applied in the plane where electrons are confined. This phenomenon known as planar Hall effect is accompanied by dependencies of both the longitudinal and the transverse components of the current on the angle $ϕ$ between the bias direction and the magnetic field. In 2DEG with spin orbit coupling (SOC) such as oxide interfaces, this effect has been experimentally witnessed. Further, a fourfold oscillation in longitudinal resistance as a function of $ϕ$ has also been observed. Motivated by these, we perform scattering theory calculations on a 2DEG with SOC in presence of an in-plane magnetic field connected to two dimensional leads on either sides to obtain longitudinal and transverse conductances. We find that the longitudinal conductance is $π$-periodic and the transverse conductance is $2π$-periodic in $ϕ$. The magnitude of oscillation in transverse conductance with $ϕ$ is enhanced in certain patches in $(α,b)$-plane where $α$ is the strength of SOC and $b$ is Zeeman energy due to magnetic field. The oscillation in transverse conductance with $ϕ$ can be highly multi-fold for large values of $α$ and $b$. The highly multi-fold oscillations of transverse conductance are due to Fabry-Pérot type interference between the modes in the central region as backed by its length dependent features. Our study establishes that SOC in a material is sufficient to observe planar Hall effect without the need for anisotropic magnetic ordering or nontrivial topology of the bandstructure.
description: 6 pages, 7 captioned figures
`Eppur Si Muove': On The Motion of the Acoustic Peak in the Correlation Function
Creators: name: Smith, Robert E.
name: Scoccimarro, Roman
name: Sheth, Ravi K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The baryonic acoustic signature in the large-scale clustering pattern of galaxies has been detected in the two-point correlation function. Its precise spatial scale has been forwarded as a rigid-rod ruler test for the space-time geometry, and hence as a probe for tracking the evolution of Dark Energy. Percent-level shifts in the measured position can bias such a test and erode its power to constrain cosmology. This paper addresses some of the systematic effects that might induce shifts: namely non-linear corrections from matter evolution, redshift space distortions and biasing. We tackle these questions through analytic methods and through a large battery of numerical simulations, with total volume of the order ~100[Gpc\h]^3. A toy-model calculation shows that if the non-linear corrections simply smooth the acoustic peak, then this gives rise to an `apparent' shifting to smaller scales. However if tilts in the broad band power spectrum are induced then this gives rise to more pernicious `physical' shifts. Our numerical simulations show evidence of both: in real space and at z=0, for the dark matter we find percent level shifts; for haloes the shifts depend on halo mass, with larger shifts being found for the most biased samples, up to 3%. From our analysis we find that physical shifts are greater than ~0.4% at z=0. In redshift space these effects are exacerbated, but at higher redshifts are alleviated. We develop an analytical model to understand this, based on solutions to the pair conservation equation using characteristic curves. When combined with modeling of pairwise velocities the model reproduces the main trends found in the data. The model may also help to unbias the acoustic peak.
description: Revisions made in line with referee reports. 22 Pages, 9 Figures. PRD submitted
Interaction-resistant metals in multicomponent Fermi systems
Creators: name: Richaud, Andrea
name: Ferraretto, Matteo
name: Capone, Massimo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze two different fermionic systems that defy Mott localization showing a metallic ground state at integer filling and very large Coulomb repulsion. The first is a multiorbital Hubbard model with a Hund's coupling, where this physics has been widely studied and the new metallic state is called a Hund's metal, and the second is a SU(3) Hubbard model with a patterned single-particle potential designed to display a similar interaction-resistant metal in a set-up which can be implemented with SU($N$) ultracold atoms. With simple analytical arguments and exact numerical diagonalization of the Hamiltonians for a minimal three-site system, we demonstrate that the interaction-resistant metal emerges in both cases as a compromise between two different insulating solutions which are stabilized by different terms of the models. This provides a strong evidence that the Hund's metal is a specific realization of a more general phenomenon which can be realized in various strongly correlated systems.
description: 11 pages, 11 figures
Theoretical Analysis of the "Double-q" Magnetic Structure of CeAl2
Creators: name: Harris, A. B.
name: Schweizer, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A model involving competing short-range isotropic Heisenberg interactions is developed to explain the "double-q" magnetic structure of CeAl$_2$. For suitably chosen interactions, terms in the Landau expansion quadratic in the order parameters explain the condensation of incommensurate order at wavevectors in the star of (1/2 $-δ$, 1/2 $+δ$, 1/2)$(2π/a)$, where $a$ is the cubic lattice constant. We show that the fourth order terms in the Landau expansion lead to the formation of the so-called "double-q" magnetic structure in which long-range order develops simultaneously at two symmetry-related wavevectors, in striking agreement with the magnetic structure determinations. Based on the value of the ordering temperature and of the Curie-Weiss $Θ$ of the susceptibility, we estimate that the nearest neighbor interaction $K_0$ is ferromagnetic, with $K_0/k=-11\pm 1$K and the next-nearest neighbor interaction $J$ is antiferromagnetic with $J/k=6 \pm 1$K. We also briefly comment on the analogous phenomenon seen in the similar system TmS.
description: 22 pages, 6 figures
Teaching English to Young Learners with Dyslexia
Creators: name: Favaro, Luciana
name: Pesce, Antonella
name: Daloiso, Michele
Publisher: name: Università Ca’ Foscari Venezia, Italia
Year: 2014

description: Il bambino italiano con dislessia può incontrare notevoli difficoltà nell'accostamento alla lingua inglese a causa di alcune sue proprietà fonologiche ed ortografiche, che ne vanno a colpire le abilità deficitarie. In questo saggio si presenterà l'impianto teorico e metodologico alla base dei ‘Percorsi Sonori’ pubblicati dagli autori per Oxford University Press. Si tratta di percorsi glottodidattici strutturati e multi-sensoriali, basati su un impianto narrativo e finalizzati al potenziamento delle abilità di discriminazione fonetica, riproduzione orale e scoperta delle regolarità ortografiche della lingua inglese.
description: EL.LE
Adaptive Bounded Integral Control With Enhanced Anti-Windup Design
Creators: name: Russo, A.
Publisher: name: Zenodo
Year: 2023
Subjects: CleanAviation
CAJU
EC
HorizonEurope
EUResearch
EUInnovation
SustainableEurope
HECATE
HEP
hybridelectricregionalaircraft
electricdistributiontechnologies
highvoltage
regionalaircraft
distributiontechnologies
digitaltwin
lifecycleassessment

description: Presentation at 62nd IEEE Conference on Decision and Control - IEEECDC2023, 13-15 Dec 2023, Singapore