cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TOPIC: - HUMAN CAPITAL INVOLVEMENT IN MERGER AND ACQUISITION (A CASE STUDY WITH INDIAN BANKING SECTOR)
Creators: name: choudhary, kamna R
Publisher: name: figshare
Year: 2023
Subjects: Human resources management

description: The article tries to explain tmhe role in involveents of employee in merger of banks. The analysis has been done based on primary data athrough the merged bank employees.
The determinants of research quality in Italy. Empirical evidence using Bibliometric data in the biotech sector
Creators: name: Iorio, Roberto
name: Labory, Sandrine
name: Paci, Daniele
Publisher: name: Universita' degli Studi di Salerno
Year: 2007
Subjects: innovation
university-industry relationship
scientific publications
biotechnology

description: Does the collaboration between firms and universities or other research organisations improves the quality of research? Why do firms collaborate with public research organisations? The rising importance of university- industry collaboration over the last twenty years makes this question a relevant one. We therefore analyse the relationships between firms and universities using data on firms’ publications in scientific journals. Among all channels through which the relationships between universities and firms are built, joint scientific publications appear to be an important but yet little explored one, especially as regards Italy. We consider the case of the biotechnology sector in Italy. Our aim is to analyse the behaviour of the firms with respect to publications and innovation, in order to shed new insights on the peculiarities of the Italian innovation system and the possible policy implications. For this purpose we built a database of all scientific publications of Italian biotechnology firms over the period 1990 to 2006 and we provide evidence on the institutional and geographic nature of publication networks and on the determinants of research quality. We find that the collaboration with universities and international partners, especially if the research networks are large and varied, increases the research quality. We also begun to collect data on firm size from 1997 to 2006, in order to confront them with the data on publications: our preliminary analysis shows that larger firms have a higher propensity to publish, however small (but not micro) firms publish very high quality papers
Spin precession mapping at ferromagnetic resonance via nuclear resonant scattering
Creators: name: Bocklage, Lars
name: Swoboda, Christian
name: Schlage, Kai
name: Wille, Hans-Christian
name: Dzemiantsova, Liudmila
name: Bajt, Saša
name: Meier, Guido
name: Röhlsberger, Ralf
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We probe the spin dynamics in a thin magnetic film at ferromagnetic resonance by nuclear resonant scattering of synchrotron radiation at the 14.4 keV resonance of $^{57}$Fe. The precession of the magnetization leads to an apparent reduction of the magnetic hyperfine field acting at the $^{57}$Fe nuclei. The spin dynamics is described in a stochastic relaxation model adapted to the ferromagnetic resonance theory by Smit and Beljers to model the decay of the excited nuclear state. From the fits of the measured data the shape of the precession cone of the spins is determined. Our results open a new perspective to determine magnetization dynamics in layered structures with very high depth resolution by employing ultrathin isotopic probe layers.
A Place Meaning Scale for Rural Communities Undergoing Landscape Change
Creators: name: Evans, Nicole M.
name: Stewart, William P.
name: van Riper, Carena
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: Computational Biology

description: Sense of place provides a strategy to identify qualities of landscape change in rural areas undergoing urban development, yet a scale to assess such qualities has not been developed. Research on place meanings tends to draw from either an interpretivist or positivist approach but does not integrate them. This research integrates the two approaches with a mixed-methods design that resulted in the first scale of regional place meanings for two counties undergoing landscape change on the urban-rural fringe. We conducted interviews and focus groups with stakeholders in Jasper County, IA and Will County, IL, followed by a household survey to assess the psychometric properties of our scale. Eight regional place meanings were identified to characterize the reasons why residents developed connections with places. This paper responds to previous calls for research to merge different philosophical paradigms and it directs attention within the place scholarship to the study of rural communities.
OPT-R: Exploring the Role of Explanations in Finetuning and Prompting for Reasoning Skills of Large Language Models
Creators: name: AlKhamissi, Badr
name: Verma, Siddharth
name: Yu, Ping
name: Jin, Zhijing
name: Celikyilmaz, Asli
name: Diab, Mona
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper, we conduct a thorough investigation into the reasoning capabilities of Large Language Models (LLMs), focusing specifically on the Open Pretrained Transformers (OPT) models as a representative of such models. Our study entails finetuning three different sizes of OPT on a carefully curated reasoning corpus, resulting in two sets of finetuned models: OPT-R, finetuned without explanations, and OPT-RE, finetuned with explanations. We then evaluate all models on 57 out-of-domain tasks drawn from the SUPER-NATURALINSTRUCTIONS benchmark, covering 26 distinct reasoning skills, utilizing three prompting techniques. Through a comprehensive grid of 27 configurations and 6,156 test evaluations, we investigate the dimensions of finetuning, prompting, and scale to understand the role of explanations on different reasoning skills. Our findings reveal that having explanations in the fewshot exemplar has no significant impact on the model's performance when the model is finetuned, while positively affecting the non-finetuned counterpart. Moreover, we observe a slight yet consistent increase in classification accuracy as we incorporate explanations during prompting and finetuning, respectively. Finally, we offer insights on which skills benefit the most from incorporating explanations during finetuning and prompting, such as Numerical (+20.4%) and Analogical (+13.9%) reasoning, as well as skills that exhibit negligible or negative effects.
description: Proceedings of the 1st Workshop on Natural Language Reasoning and Structured Explanations (NLRSE) at ACL 2023
Curvature-induced pseudogauge fields from time-dependent geometries in graphene
Creators: name: Morales, Pablo A.
name: Copinger, Patrick
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The massless Dirac equation is studied in curved spacetime on the (2+1)-dimensional graphene sheet in time-dependent geometries. Emergent pseudogauge fields are found both in the adiabatic regime and, for high-frequency periodic geometries, in the nonadiabatic regime for a generic Friedmann-Lemaître-Robertson-Walker metric in Fermi normal coordinates. The former extends the conventionally understood homogeneous pseudogauge field to include weak temporal inhomogeneities. The latter, through the usage of Floquet theory, represents a new class of emergent pseudogauge field and is argued to potentially provide a condensed matter realization of cosmological high-frequency geometries.
description: 13 pages, 1 figure; version accepted for publication in Physical Review B
Assessing variance components in multilevel linear models using approximate Bayes factors: A case study of ethnic disparities in birthweight
Creators: name: Herring, Amy H.
name: Saville, Benjamin R.
name: Kaufman, Jay S.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Racial/ethnic disparities in birthweight are a large source of differential morbidity and mortality worldwide and have remained largely unexplained in epidemiologic models. We assess the impact of maternal ancestry and census tract residence on infant birth weights in New York City and the modifying effects of race and nativity by incorporating random effects in a multilevel linear model. Evaluating the significance of these predictors involves the test of whether the variances of the random effects are equal to zero. This is problematic because the null hypothesis lies on the boundary of the parameter space. We generalize an approach for assessing random effects in the two-level linear model to a broader class of multilevel linear models by scaling the random effects to the residual variance and introducing parameters that control the relative contribution of the random effects. After integrating over the random effects and variance components, the resulting integrals needed to calculate the Bayes factor can be efficiently approximated with Laplace’s method.
KineticNet: Deep learning a transferable kinetic energy functional for orbital-free density functional theory
Creators: name: Remme, Roman
name: Kaczun, Tobias
name: Scheurer, Maximilian
name: Dreuw, Andreas
name: Hamprecht, Fred A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.2.6; J.2
subject: 68T07 (Primary) 81-10 (Secondary)

description: Orbital-free density functional theory (OF-DFT) holds the promise to compute ground state molecular properties at minimal cost. However, it has been held back by our inability to compute the kinetic energy as a functional of the electron density only. We here set out to learn the kinetic energy functional from ground truth provided by the more expensive Kohn-Sham density functional theory. Such learning is confronted with two key challenges: Giving the model sufficient expressivity and spatial context while limiting the memory footprint to afford computations on a GPU; and creating a sufficiently broad distribution of training data to enable iterative density optimization even when starting from a poor initial guess. In response, we introduce KineticNet, an equivariant deep neural network architecture based on point convolutions adapted to the prediction of quantities on molecular quadrature grids. Important contributions include convolution filters with sufficient spatial resolution in the vicinity of the nuclear cusp, an atom-centric sparse but expressive architecture that relays information across multiple bond lengths; and a new strategy to generate varied training data by finding ground state densities in the face of perturbations by a random external potential. KineticNet achieves, for the first time, chemical accuracy of the learned functionals across input densities and geometries of tiny molecules. For two electron systems, we additionally demonstrate OF-DFT density optimization with chemical accuracy.
description: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in The Journal of Chemical Physics 159, 144113 (2023) and may be found at https://doi.org/10.1063/5.0158275
On the statistical mechanics of shape fluctuations of nearly spherical lipid vesicle
Creators: name: Bivas, I.
name: Tonchev, N. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The mechanical properties of biological membranes play an important role in the structure and the functioning of living organisms. One of the most widely used methods for determination of the bending elasticity modulus of the model lipid membranes (simplified models of the biomembranes with similar mechanical properties) is analysis of the shape fluctuations of the nearly spherical lipid vesicles. A theoretical basis of such an analysis is developed by Milner and Safran. In the present studies we analyze their results using an approach based on the Bogoljubov inequalities and the approximating Hamiltonian method. This approach is in accordance with the principles of statistical mechanics and is free of contradictions. Our considerations validate the results of Milner and Safran if the stretching elasticity K_s of the membrane tends to zero.
description: 8 pages, talk at the 18th International School on Condensed Matter Physics, Sept. 2014, Varna, Bulgaria
Ballot-Polling Audits of Instant-Runoff Voting Elections with a Dirichlet-Tree Model
Creators: name: Everest, Floyd
name: Blom, Michelle
name: Stark, Philip B.
name: Stuckey, Peter J.
name: Teague, Vanessa
name: Vukcevic, Damjan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applications (stat.AP)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Instant-runoff voting (IRV) is used in several countries around the world. It requires voters to rank candidates in order of preference, and uses a counting algorithm that is more complex than systems such as first-past-the-post or scoring rules. An even more complex system, the single transferable vote (STV), is used when multiple candidates need to be elected. The complexity of these systems has made it difficult to audit the election outcomes. There is currently no known risk-limiting audit (RLA) method for STV, other than a full manual count of the ballots. A new approach to auditing these systems was recently proposed, based on a Dirichlet-tree model. We present a detailed analysis of this approach for ballot-polling Bayesian audits of IRV elections. We compared several choices for the prior distribution, including some approaches using a Bayesian bootstrap (equivalent to an improper prior). Our findings include that the bootstrap-based approaches can be adapted to perform similarly to a full Bayesian model in practice, and that an overly informative prior can give counter-intuitive results. Via carefully chosen examples, we show why creating an RLA with this model is challenging, but we also suggest ways to overcome this. As well as providing a practical and computationally feasible implementation of a Bayesian IRV audit, our work is important in laying the foundation for an RLA for STV elections.
description: 17 pages, 6 figures. Presented at EIS 2022. This version contains minor corrections to match the final published version
Sample size estimation for alternating logistic regressions analysis of multilevel randomized community trials of under-age drinking
Creators: name: Wolfson, Mark
name: Song, Eun-Young
name: Preisser, John S.
name: Reboussin, Beth A.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Under-age drinking is an enormous public health issue in the USA. Evidence that community level structures may impact on under-age drinking has led to a proliferation of efforts to change the environment surrounding the use of alcohol. Although the focus of these efforts is to reduce drinking by individual youths, environmental interventions are typically implemented at the community level with entire communities randomized to the same intervention condition. A distinct feature of these trials is the tendency of the behaviours of individuals residing in the same community to be more alike than that of others residing in different communities, which is herein called ‘clustering’. Statistical analyses and sample size calculations must account for this clustering to avoid type I errors and to ensure an appropriately powered trial. Clustering itself may also be of scientific interest. We consider the alternating logistic regressions procedure within the population-averaged modelling framework to estimate the effect of a law enforcement intervention on the prevalence of under-age drinking behaviours while modelling the clustering at multiple levels, e.g. within communities and within neighbourhoods nested within communities, by using pairwise odds ratios. We then derive sample size formulae for estimating intervention effects when planning a post-test-only or repeated cross-sectional community-randomized trial using the alternating logistic regressions procedure.
Wind accretion: Theory and Observations
Creators: name: Shakura, N. I.
name: Postnov, K. A.
name: Kochetkova, A. Yu.
name: Hjalmarsdotter, L.
name: Sidoli, L.
name: Paizis, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A review of wind accretion in HMXB is presented. We focus on different regimes of quasi-spherical accretion onto a NS: supersonic (Bondi) accretion, which takes place when the captured matter cools down rapidly and falls supersonically towards the NS magnetosphere, and subsonic (settling) accretion which occurs when the plasma remains hot until it meets the magnetospheric boundary. The two regimes are separated by a limit in X-ray luminosity at about 4 10^{36} erg/s. In subsonic accretion, which works a hot quasi-spherical shell must form around the magnetosphere, and the actual accretion rate onto the NS is determined by the ability of the plasma to enter the magnetosphere due to the Rayleigh-Taylor instability. Two regimes of subsonic accretion are possible, depending on the plasma cooling mechanism (Compton or radiative) near the magnetopshere. The transition from the high-luminosity regime with Compton cooling to the low-luminosity (L_x < 3\times 10^35 erg/s) regime with radiative cooling can be responsible for the onset of the 'off' states repeatedly observed in several X-ray pulsars, such as Vela X-1, GX 301-2 and 4U 1907+09. The triggering of the transition may be due to a switch in the X-ray beam pattern in response to a change in the optical depth in the accretion column with changing luminosity. We also show that in the settling accretion theory, bright X-ray flares (10^{38}-10^{40} ergs) observed in SFXT may be produced by sporadic capture of magnetized stellar-wind plasma. At sufficiently low accretion rates, magnetic reconnection can enhance the magnetospheric plasma entry rate, resulting in copious production of X-ray photons, strong Compton cooling and ultimately in unstable accretion of the entire shell. A bright flare develops on the free-fall time scale in the shell, and the typical energy released in an SFXT bright flare corresponds to the mass of the shell.
description: 18 pages, 5 figures, Invited talk at the Zeldovich-100 Conference in Minsk, March 2014; To be published in a special issue of Astron. Reports; new references added
Triggering Boundary Phase Transitions through Bulk Measurements in 2D Cluster States
Creators: name: Guo, Yuchen
name: Zhang, Jian-Hao
name: Bi, Zhen
name: Yang, Shuo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the phase diagram at the boundary of an infinite two-dimensional cluster state subject to bulk measurements using tensor network methods. The state is subjected to uniform measurements $M = \cosθZ+\sinθX$ on the lower boundary qubits and in all bulk qubits. Our results show that the boundary of the system exhibits volume-law entanglement at the measurement angle $θ= π/2$ and area-law entanglement for any $θ< π/2$. Within the area-law phase, a phase transition occurs at $θ_c=1.371$. The phase with $θ\in(θ_c,π/2)$ is characterized by a noninjective matrix product state, which cannot be realized as the unique ground state of a one-dimensional local, gapped Hamiltonian. Instead, it resembles a cat state with spontaneous symmetry breaking. These findings demonstrate that the phase diagram of the boundary of a two-dimensional system can be more intricate than that of a standard one-dimensional system.
description: 7 pages, 6 figures
Développer ensemble la résonnance au monde
Creators: name: Rosa, Hartmut
name: Wallenhorst, Nathanaël
Publisher: name: bildungsforschung
Year: 2018

description: Interview de Hartmut Rosa
description: bildungsforschung, Nr. 1 (2017): Nous n’avons pas fini d’apprendre! Wir lernen immer weiter!
Minsum Location Extended to Gauges and to Convex Sets
Creators: name: Jahn, Thomas
name: Kupitz, Yaakov S.
name: Martini, Horst
name: Richter, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Metric Geometry (math.MG)
subject: Functional Analysis (math.FA)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 46A22, 46B20, 49K10, 49N15, 52A20, 52A21, 52A41, 90B85, 90C25, 90C46

description: One of the oldest and richest problems from continuous location science is the famous Fermat-Torricelli problem, asking for the unique point in Euclidean space that has minimal distance sum to n given (non-collinear) points. Many natural and interesting generalizations of this problem were investigated, e.g., by extending it to non-Euclidean spaces and modifying the used distance functions, or by generalizing the configuration of participating geometric objects. In the present paper, we extend the Fermat-Torricelli problem in a two-fold way: more general than for normed spaces, the unit balls of our spaces are compact convex sets having the origin as interior point (but without symmetry condition), and the n given objects can be general convex sets (instead of points). We combine these two viewpoints, and the presented sequence of new theorems follows in a comparing sense that of theorems known for normed spaces. Some of these results holding for normed spaces carry over to our more general setting, and others not. In addition, we present analogous results for related questions, like, e.g., for Heron's problem. And finally we derive a collection of results holding particularly for the Euclidean norm.
description: submitted to Journal of Optimization Theory and Applications
Multiscale adaptive regression models for neuroimaging data: Multiscale Adaptive Regression Models
Creators: name: Gilmore, John H.
name: Shen, Dinggang
name: Li, Yimei
name: Ibrahim, Joseph G.
name: Lin, Weili
name: Zhu, Hongtu
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Neuroimaging studies aim to analyze imaging data with complex spatial patterns in a large number of locations (called voxels) on a two-dimensional (2D) surface or in a 3D volume. Conventional analyses of imaging data include two sequential steps: spatially smoothing imaging data and then independently fitting a statistical model at each voxel. However, conventional analyses suffer from the same amount of smoothing throughout the whole image, the arbitrary choice of smoothing extent, and low statistical power in detecting spatial patterns. We propose a multiscale adaptive regression model (MARM) to integrate the propagation–separation (PS) approach (Polzehl and Spokoiny, 2000, 2006) with statistical modeling at each voxel for spatial and adaptive analysis of neuroimaging data from multiple subjects. MARM has three features: being spatial, being hierarchical, and being adaptive. We use a multiscale adaptive estimation and testing procedure (MAET) to utilize imaging observations from the neighboring voxels of the current voxel to adaptively calculate parameter estimates and test statistics. Theoretically, we establish consistency and asymptotic normality of the adaptive parameter estimates and the asymptotic distribution of the adaptive test statistics. Our simulation studies and real data analysis confirm that MARM significantly outperforms conventional analyses of imaging data.
Entanglement barrier and its symmetry resolution: theory and experiment
Creators: name: Rath, Aniket
name: Vitale, Vittorio
name: Murciano, Sara
name: Votto, Matteo
name: Dubail, Jérôme
name: Kueng, Richard
name: Branciard, Cyril
name: Calabrese, Pasquale
name: Vermersch, Benoît
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The operator entanglement (OE) is a key quantifier of the complexity of a reduced density matrix. In out-of-equilibrium situations, e.g. after a quantum quench of a product state, it is expected to exhibit an entanglement barrier. The OE of a reduced density matrix initially grows linearly as entanglement builds up between the local degrees of freedom, it then reaches a maximum, and ultimately decays to a small finite value as the reduced density matrix converges to a simple stationary state through standard thermalization mechanisms. Here, by performing a new data analysis of the published experimental results of [Brydges et al., Science 364, 260 (2019)], we obtain the first experimental measurement of the OE of a subsystem reduced density matrix in a quantum many-body system. We employ the randomized measurements toolbox and we introduce and develop a new efficient method to post-process experimental data in order to extract higher-order density matrix functionals and access the OE. The OE thus obtained displays the expected barrier as long as the experimental system is large enough. For smaller systems, we observe a barrier with a double-peak structure, whose origin can be interpreted in terms of pairs of quasi-particles being reflected at the boundary of the qubit chain. As $U(1)$ symmetry plays a key role in our analysis, we introduce the notion of symmetry resolved operator entanglement (SROE), in addition to the total OE. To gain further insights into the SROE, we provide a thorough theoretical analysis of this new quantity in chains of non-interacting fermions, which, in spite of their simplicity, capture most of the main features of OE and SROE. In particular, we uncover three main physical effects: the presence of a barrier in any charge sector, a time delay for the onset of the growth of SROE, and an effective equipartition between charge sectors.
description: 13 + 24 pages with 3 + 7 figures
Internet of Things al servizio della salute e della sicurezza dei lavoratori
Creators: name: Ambrosino, Antonio
Publisher: name: Diritto della sicurezza sul lavoro
Year: 2022

description: Il contributo esamina il ruolo dei dispositivi di protezione individuale evoluti nell’ambito del rapporto di lavoro, appuntando l’interesse sull'impiego della c.d. “tecnologia indossabile”, che rappresenta un’area di sviluppo dell’Internet of Things. A tal proposito, è stata indagata la possibilità, da parte del datore di lavoro, di poter assolvere all’obbligazione di sicurezza di cui all’art. 2087 c.c. mediante l’utilizzo della tecnologia dell’Internet of Things. Ulteriore ambito di ricerca approfondito nell’articolo ha riguardato, poi, la verifica del pieno rispetto delle tutele in materia di privacy e dati personali dei prestatori nelle ipotesi di utilizzo delle nuove tecnologie in funzione prevenzionistica e, segnatamente, dell’Internet of Things.
description: Diritto della sicurezza sul lavoro, N. 2 (2022)
Per una letteratura dell’inclusione. Attuali metodologie e nuove proposte per la didattica della letteratura a partire dall’estetica di Lev S. Vygotskij
Creators: name: Tabacchini, Paolo
Publisher: name: Linguæ & - Journal of Modern Languages and Cultures
Year: 2022

description: L’articolo presenta i principali metodi della didattica della letteratura e si focalizza sui più attuali e articolati: l’ermeneutico e l’ermeneutico e relazionale. Quest’ultimo viene esplorato dettagliatamente nelle sua struttura e procedura e nelle sua correlazione con altri modelli didattici che intende integrare: la comunicazione interculturale e la psicologia della Gestalt. Viene messo in luce il punto meno sviluppato del metodo, la globalità, la delicata e fondamentale fase inziale del processo di insegnamento/apprendimento. Si propone quindi un’ipotesi metodologica in grado di correggere il tiro ed ampliare quest’importante fase: una concezione aggiornata del concetto di estetica, intesa in senso neuropsicologico di complessa reazione emozionale all’opera letteraria, alla luce della teorizzazione dello psicologo e pedagogista sovietico Lev Semënovič Vygotskij espresse nei suoi scritti giovanili dedicate al tema.
description: Linguæ & - Journal of Modern Languages and Cultures, V. 21 N. 1 (2022)
Apprendre ensemble une citoyenneté existentielle – Enjeux anthropologiques et politiques en anthropocène
Creators: name: Wallenhorst, Nathanaël
Publisher: name: bildungsforschung
Year: 2018

description: Cette contribution est une étude théorique dans le champ de la pensée éducative à partir de ce qui est considéré ici comme la principale caractéristique de la période contemporaine : l’entrée dans l’anthropocène. La proposition développée n’est pas consacrée à la façon dont nous apprenons mais à ce qu’il nous faut apprendre. L’auteur prend ainsi le risque d’une pensée normative, dans le prolongement de la tradition de la théorie critique de l’école de Frankfort et de la théorie politique. La réflexion commence par le constat de l’anthropocène et formule une double hypothèse de la défaillance de la responsabilité du monde et de la préparation de l’avenir, révélant ainsi une crise du politique. La proposition théorique développée s’appuie ensuite sur l’hypothèse de la nécessité pour l’humanité d’évoluer pour assurer sa pérennité au sein de l’étendue terrestre. Enfin, la dernière partie porte sur un moyen (parmi d’autres) d’accompagnement de cette évolution anthropologique : l’« apprentissage ensemble » d’une citoyenneté existentielle. This contribution is a theoretical study in the field of the educational thought from what is considered here as the main characteristic of the contemporary period: the entry into the anthropocene. The proposal developed is not devoted to the way we learn but to what we need to learn. The author thus takes the risk of a normative thought, following the tradition of the critical theory of the Frankfurt school and of political theory. The reflection begins with the anthropocene's observation and formulates a double hypothesis of the failure of the responsibility of the world and the preparation of the future, thus revealing a crisis of politics. The theoretical proposition developed then relies on the hypothesis of the necessity for humanity to evolve to ensure its perenniality on Earth. Finally, the last part deals with a means (among others) of accompanying this anthropological evolution: the « learning together » of an existential citizenship.
description: bildungsforschung, Nr. 1 (2017): Nous n’avons pas fini d’apprendre! Wir lernen immer weiter!
Cumulative incidence association models for bivariate competing risks data: Cumulative Incidence Association Models
Creators: name: Fine, Jason P.
name: Cheng, Yu
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Association models, like frailty and copula models, are frequently used to analyze clustered survival data and evaluate within-cluster associations. The assumption of noninformative censoring is commonly applied to these models, though it may not be true in many situations. In this paper, we consider bivariate competing risk data and focus on association models specified for the bivariate cumulative incidence function (CIF), a nonparametrically identifiable quantity. Copula models are proposed which relate the bivariate CIF to its corresponding univariate CIFs, similarly to independently right censored data, and accommodate frailty models for the bivariate CIF. Two estimating equations are developed to estimate the association parameter, permitting the univariate CIFs to be estimated either parametrically or nonparametrically. Goodness-of-fit tests are presented for formally evaluating the parametric models. Both estimators perform well with moderate sample sizes in simulation studies. The practical use of the methodology is illustrated in an analysis of dementia associations.
Nonlinear valley and spin currents from Fermi pocket anisotropy in 2D crystals
Creators: name: Yu, Hongyi
name: Wu, Yue
name: Liu, Gui-Bin
name: Xu, Xiaodong
name: Yao, Wang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Controlled flow of spin and valley pseudospin is key to future electronics exploiting these internal degrees of freedom of carriers. Here we discover a universal possibility for generating spin and valley currents by electric bias or temperature gradient only, which arises from the anisotropy of Fermi pockets in crystalline solids. We find spin and valley currents to the second order in the electric field, as well as their thermoelectric counterparts, i.e. the nonlinear spin and valley Seebeck effects. These second-order nonlinear responses allow two unprecedented possibilities to generate pure spin and valley flows without net charge current: (i) by an AC bias; or (ii) by an arbitrary inhomogeneous temperature distribution. As examples, we predict appreciable nonlinear spin and valley currents in two-dimensional (2D) crystals including graphene, monolayer and trilayer transition metal dichalcogenides, and monolayer gallium selenide. Our finding points to a new route towards electrical and thermal generations of spin and valley currents for spintronic and valleytronic applications based on 2D quantum materials.
Analyse discursive et intersémiotique des livrets des musées du Quai Branly et de Nantes pour les enfants
Creators: name: Raschi, Nataša
Publisher: name: Linguæ & - Journal of Modern Languages and Cultures
Year: 2022

description: Notre contribution analysera quelques livrets pour les enfants de musées français consacrés à l’esclavage selon trois moments différents : la description des matériaux repérés, l’analyse textuelle et la comparaison critique. Notre point de vue, discursif et intersémiotique, nous permettra d’observer ce qui se construit entre ces œuvres et l’enfant, et, plus largement, entre l’enfant et le musée.
description: Linguæ & - Journal of Modern Languages and Cultures, V. 21 N. 1 (2022)
Apprendre et participer: Le jeu de l’enfant en situation de handicap
Creators: name: Blin, Ludovic
Publisher: name: bildungsforschung
Year: 2018

description: L’article tente d’appréhender la relation entre participer et apprendre, apprendre et participer, et ce, lorsque l’enfant en situation de handicap joue avec d’autres, enfants ou adultes. Pour mettre en lumière ce lien, nous utilisons des données empiriques émanant d’une recherche ethnographique dans le cadre d’une thèse de doctorat sur la participation de l’enfant en situation de handicap à un jeu. Ensuite, nous analysons ces données en utilisant le cadre théorique des communautés de pratique de Wenger (2005) et les deux dimensions de la participation que sont pour Billett (2008), l’engagement et l’affordance. Learn and participate: The play of the child in situation of handicap The article tries to understand the relation between participate and learn, learn and participate and that, when the child in situation of handicap plays with others, child or adult. To highlight this link, we use empirical data emanating from an ethnographical search within the framework of a doctoral thesis about the participation of the child in situation of handicap in a play. Then, we analyze these data using the theoretical frame of the communities of practice of Wenger (2005) and the two dimensions of the participation that are the commitment and the affordance for Billett (2008).
description: bildungsforschung, Nr. 1 (2017): Nous n’avons pas fini d’apprendre! Wir lernen immer weiter!
Three-body model calculation of the 2$^+$ state in $^{26}$O
Creators: name: Hagino, K.
name: Sagawa, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We discuss the energy of the excited 2$^+$ state in the unbound nucleus $^{26}$O using the three-body model of $^{24}$O+$n$+$n$. This model fully takes into account the continuum effects as well as the dineutron correlation of the valence neutrons. The present calculation yields the energy of 1.354 MeV, which is slightly smaller than the unperturbed energy, 1.54 MeV. The energy shifts for the ground and the 2$^+$ states with respect to the unperturbed energy suggest that 0$^+$ and the 2$^+$ states in $^{26}$O show a typical spectrum well described by a short-range pairing interaction acting on two valence nucleons in the same orbit.
description: 4 pages, 1 figure
Two-dimensional metal-chalcogenide films in tunable optical microcavities
Creators: name: Schwarz, S.
name: Dufferwiel, S.
name: Walker, P. M.
name: Withers, F.
name: Trichet, A. A. P.
name: Sich, M.
name: Li, F.
name: Chekhovich, E. A.
name: Borisenko, D. N.
name: Kolesnikov, N. N.
name: Novoselov, K. S.
name: Skolnick, M. S.
name: Smith, J. M
name: Krizhanovskii, D. N.
name: Tartakovskii, A. I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quasi-two-dimensional (2D) films of layered metal-chalcogenides have attractive optoelectronic properties. However, photonic applications of thin films may be limited owing to weak light absorption and surface effects leading to reduced quantum yield. Integration of 2D films in optical microcavities will permit these limitations to be overcome owing to modified light coupling with the films. Here we present tunable microcavities with embedded monolayer MoS2 or few monolayer GaSe films. We observe significant modification of spectral and temporal properties of photoluminescence (PL): PL is emitted in spectrally narrow and wavelength-tunable cavity modes with quality factors up to 7400; PL life-time shortening by a factor of 10 is achieved, a consequence of Purcell enhancement of the spontaneous emission rate. This work has potential to pave the way to microcavity-enhanced light-emitting devices based on layered 2D materials and their heterostructures, and also opens possibilities for cavity QED in a new material system of van der Waals crystals.
Local polynomial regression for symmetric positive definite matrices: Local Polynomial Regression
Creators: name: Yuan, Ying
name: Zhu, Hongtu
name: Marron, J. S.
name: Lin, Weili
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Local polynomial regression has received extensive attention for the nonparametric estimation of regression functions when both the response and the covariate are in Euclidean space. However, little has been done when the response is in a Riemannian manifold. We develop an intrinsic local polynomial regression estimate for the analysis of symmetric positive definite (SPD) matrices as responses that lie in a Riemannian manifold with covariate in Euclidean space. The primary motivation and application of the proposed methodology is in computer vision and medical imaging. We examine two commonly used metrics, including the trace metric and the Log-Euclidean metric on the space of SPD matrices. For each metric, we develop a cross-validation bandwidth selection method, derive the asymptotic bias, variance, and normality of the intrinsic local constant and local linear estimators, and compare their asymptotic mean square errors. Simulation studies are further used to compare the estimators under the two metrics and to examine their finite sample performance. We use our method to detect diagnostic differences between diffusion tensors along fiber tracts in a study of human immunodeficiency virus.
Survey on Machine Learning for Traffic-Driven Service Provisioning in Optical Networks
Creators: name: Panayiotou, Tania
name: Michalopoulou, Maria
name: Ellinas, Georgios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The unprecedented growth of the global Internet traffic, coupled with the large spatio-temporal fluctuations that create, to some extent, predictable tidal traffic conditions, are motivating the evolution from reactive to proactive and eventually towards adaptive optical networks. In these networks, traffic-driven service provisioning can address the problem of network over-provisioning and better adapt to traffic variations, while keeping the quality-of-service at the required levels. Such an approach will reduce network resource over-provisioning and thus reduce the total network cost. This survey provides a comprehensive review of the state of the art on machine learning (ML)-based techniques at the optical layer for traffic-driven service provisioning. The evolution of service provisioning in optical networks is initially presented, followed by an overview of the ML techniques utilized for traffic-driven service provisioning. ML-aided service provisioning approaches are presented in detail, including predictive and prescriptive service provisioning frameworks in proactive and adaptive networks. For all techniques outlined, a discussion on their limitations, research challenges, and potential opportunities is also presented.
description: This paper appears in IEEE Communications Surveys & Tutorials
Joint Multi-Cell Resource Allocation Using Pure Binary-Integer Programming for LTE Uplink
Creators: name: Zhang, Tong
name: Tao, Xiaofeng
name: Cui, Qimei
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Due to high system capacity requirement, 3GPP Long Term Evolution (LTE) is likely to adopt frequency reuse factor 1 at the cost of suffering severe inter-cell interference (ICI). One of combating ICI strategies is network cooperation of resource allocation (RA). For LTE uplink RA, requiring all the subcarriers to be allocated adjacently complicates the RA problem greatly. This paper investigates the joint multi-cell RA problem for LTE uplink. We model the uplink RA and ICI mitigation problem using pure binary-integer programming (BIP), with integrative consideration of all users' channel state information (CSI). The advantage of the pure BIP model is that it can be solved by branch-and-bound search (BBS) algorithm or other BIP solving algorithms, rather than resorting to exhaustive search. The system-level simulation results show that it yields 14.83% and 22.13% gains over single-cell optimal RA in average spectrum efficiency and 5th percentile of user throughput, respectively.
description: Accepted to IEEE Vehicular Technology Conference (VTC Spring), Seoul, Korea, May, 2014
Simplicial 2-spheres obtained from non-singular complete fans
Creators: name: Suyama, Yusuke
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 52B05, 14M25

description: We prove that a simplicial 2-sphere satisfying a certain condition is the underlying simplicial complex of a 3-dimensional non-singular complete fan. In particular, this implies that any simplicial 2-sphere with $\leq 18$ vertices is the underlying simplicial complex of such a fan.
description: 9 pages, 39 figures
Le potentiel apprenant et capacitant du bénévolat: Une perspective inter- et intragénérationnelle
Creators: name: Cortessis, Sandrine
name: Weber Guisan, Saskia
Publisher: name: bildungsforschung
Year: 2018

description: A partir de témoignages de bénévoles de deux tranches d’âge (16-25 ans et 37-63 ans) issus de deux recherches qualitatives, cet article s’intéresse aux mécanismes d’engagement, de développement et de transmission au sein des pratiques bénévoles. Les questions suivantes sont notamment abordées : qu’est-ce qui conduit des individus à s’engager de manière volontaire et non rémunérée à différents âges de la vie et qu’y trouvent-ils ? Quels apprentissages et quels développements identitaires peut-on constater ? Comment s’opère la transmission inter- et intragénérationnelle dans le secteur associatif bénévole ? Qu’offrent les associations pour accueillir, encadrer et motiver les bénévoles à s’impliquer ? The learning and enabling potential of volunteering: An inter- and intragenerational perspective Based on testimonies of volunteers of two age groups (16-25 y.o. and 37-63 y.o.) from two qualitative studies, this article focuses on the mechanisms of engagement, development and transmission within voluntary practices. The following questions are addressed in particular: what does lead individuals to voluntarily commit themselves at different stages of life and what do they find there? What kind of learning outcomes and identity developments can be observed? How does inter- and intragenerational transmission take place in the voluntary sector? What do associations offer to welcome, guide and motivate people to commit themselves?
description: bildungsforschung, Nr. 1 (2017): Nous n’avons pas fini d’apprendre! Wir lernen immer weiter!
Measurements of the azimuthal anisotropy of prompt and nonprompt charmonia in PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The second-order ($v_2$) and third-order ($v_3$) Fourier coefficients describing the azimuthal anisotropy of prompt and nonprompt (from b-hadron decays) J/$ψ$, as well as prompt $ψ$(2S) mesons are measured in lead-lead collisions at a center-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV. The analysis uses a data set corresponding to an integrated luminosity of 1.61 nb$^{-1}$ recorded with the CMS detector. The J/$ψ$ and $ψ$(2S) mesons are reconstructed using their dimuon decay channel. The $v_2$ and $v_3$ coefficients are extracted using the scalar product method and studied as functions of meson transverse momentum and collision centrality. The measured $v_2$ values for prompt J/$ψ$ mesons are found to be larger than those for nonprompt J/$ψ$ mesons. The prompt J/$ψ$ $v_2$ values at high $p_\mathrm{T}$ are found to be underpredicted by a model incorporating only parton energy loss effects in a quark-gluon plasma medium. Prompt and nonprompt J/$ψ$ meson $v_3$ and prompt $ψ$(2S) $v_2$ and $v_3$ values are also reported for the first time, providing new information about heavy quark interactions in the hot and dense medium created in heavy ion collisions.
description: Replaced with the published version. Added the journal reference and the DOI.. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-21-008 (CMS Public Pages)