bluuebunny/crossref_metadata_2025_split huggingface dataset:
All order effective action for charge diffusion from Schwinger-Keldysh holography
Authors: Bu Yanyan , Demircik Tuna , Lublinsky Michael 
Published: May 2021

Abstract
An effective action for diffusion of a conserved U(1) charge is derived to all orders in the derivative expansion within a holographic model dual to the Schwinger-Keldysh closed time path. A systematic approach to solution of the 5D Maxwell equations in a doubled Schwarzschild-AdS5 black brane geometry is developed. Constitutive relation for the stochastic charge current is shown to have a term induced by thermal fluctuations (coloured noise). All transport coefficient functions parameterising the effective action and constitutive relations are computed analytically in the hydrodynamic expansion, and then numerically for finite momenta.
Nonperturbative dynamics of (2+1)d ϕ4-theory from Hamiltonian truncation
Authors: Anand Nikhil , Katz Emanuel , Khandker Zuhair U. , Walters Matthew T. 
Published: May 2021

Abstract
We use Lightcone Conformal Truncation (LCT)—a version of Hamiltonian truncation — to study the nonperturbative, real-time dynamics of ϕ4-theory in 2+1 dimensions. This theory has UV divergences that need to be regulated. We review how, in a Hamiltonian framework with a total energy cutoff, renormalization is necessarily state-dependent, and UV sensitivity cannot be canceled with standard local operator counter-terms. To overcome this problem, we present a prescription for constructing the appropriate state-dependent counterterms for (2+1)d ϕ4-theory in lightcone quantization. We then use LCT with this counterterm prescription to study ϕ4-theory, focusing on the ℤ2 symmetry-preserving phase. Specifically, we compute the spectrum as a function of the coupling and demonstrate the closing of the mass gap at a (scheme-dependent) critical coupling. We also compute Lorentz-invariant two-point functions, both at generic strong coupling and near the critical point, where we demonstrate IR universality and the vanishing of the trace of the stress tensor.
The bi-conical vector model at 1/N
Authors: Chai Noam , Rabinovici Eliezer , Sinha Ritam , Smolkin Michael 
Published: May 2021

Abstract
We study finite N aspects of the O(m) × O(N − m) vector model with quartic interactions in general 2 ≤ d ≤ 6 spacetime dimensions. This model has recently been shown [1, 2] to display the phenomenon of persistent symmetry breaking at a perturbative Wilson-Fisher-like fixed point in d = 4 − ϵ dimensions. The large rank limit of the biconical model displays a conformal manifold and a moduli space of vacua. We find a set of three double trace scalar operators that are respectively irrelevant, relevant and marginal deformations of the conformal manifold in general d. We calculate the anomalous dimensions of the single and multi-trace scalar operators to the first sub-leading order in the large rank expansion. The anomalous dimension of the marginal operator does not vanish in general, indicating that the conformal manifold is lifted at finite N . In the case of equal ranks we are able to derive explicitly the scaling dimensions of various operators as functions of only d.
String integrability of defect CFT and dynamical reflection matrices
Authors: Linardopoulos Georgios , Zarembo Konstantin 
Published: May 2021

Abstract
The D3-D5 probe-brane system is holographically dual to a defect CFT which is known to be integrable. The evidence comes mainly from the study of correlation functions at weak coupling. In the present work we shed light on the emergence of integrability on the string theory side. We do so by constructing the double row transfer matrix which is conserved when the appropriate boundary conditions are imposed. The corresponding reflection matrix turns out to be dynamical and depends both on the spectral parameter and the string embedding coordinates.
Snowfall and snowpack in the Western U.S. as captured by convection permitting climate simulations: current climate and pseudo global warming future climate
Authors: Ikeda Kyoko , Rasmussen Roy , Liu Changhai , Newman Andrew , Chen Fei , Barlage Mike , Gutmann Ethan , Dudhia Jimy , Dai Aiguo , Luce Charles , Musselman Keith 
Published: May 2021

AbstractThis study examines current and future western U.S. snowfall and snowpack through current and future climate simulations with a 4-km horizontal grid spacing cloud permitting regional climate model over the entire CONtinental U.S. for a 13-year period between 2001 and 2013. At this horizontal resolution, the spatiotemporal distribution of the orographic snowfall and snowpack is well captured partly due to the ability of the model to realistically simulate mesoscale and microphysical features such as orographically induced updrafts driving clouds and precipitation. The historical simulation well captures the observed snowfall and snowpack amounts and pattern in the western U.S. The future climate simulation uses the Pseudo-Global Warming approach, taking the climate change signal from CMIP5 multi-model ensemble-mean difference between 2070–2099 and 1976–2005. The results show that the thermodynamic impacts of climate change in the western U.S. can be characterized considering mountain ranges in two distinct geographic regions: the mountain ranges close to the Pacific Ocean (coastal ranges) and those in the inter-mountain west. Climate change out to 2100 significantly impacts all aspects of the water cycle, with pronounced climate change response in the coastal ranges. A notable result is that the snowpack in the Pacific Northwest is predicted to decrease by ~ 70% by 2100. Trends of this magnitude have already been observed in the historical data and in previous studies. The current Pseudo Global Warming future climate simulation and previous global climate simulations all suggest that these trends will continue to the point that most snowpack will be gone by 2100 in the Pacific Northwest for the most aggressive RCP8.5 climate scenario, even if annual precipitation increases by 10%. Future work will focus on extending the current convective permitting results to a full climate change simulation allowing for dynamical changes in the flow.
Orchestrating children’s action: an in-depth multimodal analysis of child-educator interactions in one Italian early childhood education setting
Authors: Fatigante Marilena , Antici Lilia , Zucchermaglio Cristina , Fantasia Valentina , Alby Francesca 
Published: May 2021

AbstractEarly childhood educational centers (ECEC) are contexts where young children make their first contact with specific, culturally determined rules, practices, and values. Only a few studies have analyzed in-depth the practices through which the educators direct the children’s action and attention while they are performing routine educational activities. By means of detailed transcription of educators-children conversations and Conversation Analytic methodology, this work examines a set of videorecorded interactions collected in one Italian ECE center (“nido”), particularly focusing on the verbal and multimodal resources employed by ECEC teachers as they manage episodes, where the children diverge from an expected course of action. Analyses reveal that the educators employ a variety of multimodal resources to orchestrate the child’s attention and actions toward the desired course of activity, which open spaces where the child’s agency, however more or less strongly reprimanded, is admitted and negotiated.
Voting with random classifiers (VORACE): theoretical and experimental analysis
Authors: Cornelio Cristina , Donini Michele , Loreggia Andrea , Pini Maria Silvia , Rossi Francesca 
Published: May 2021

AbstractIn many machine learning scenarios, looking for the best classifier that fits a particular dataset can be very costly in terms of time and resources. Moreover, it can require deep knowledge of the specific domain. We propose a new technique which does not require profound expertise in the domain and avoids the commonly used strategy of hyper-parameter tuning and model selection. Our method is an innovative ensemble technique that uses voting rules over a set of randomly-generated classifiers. Given a new input sample, we interpret the output of each classifier as a ranking over the set of possible classes. We then aggregate these output rankings using a voting rule, which treats them as preferences over the classes. We show that our approach obtains good results compared to the state-of-the-art, both providing a theoretical analysis and an empirical evaluation of the approach on several datasets.
Human–Animal Relations in Business and Society: Advancing the Feminist Interpretation of Stakeholder Theory
Authors: Tallberg Linda , García-Rosell José-Carlos , Haanpää Minni 
Published: May 2021

AbstractStakeholder theory has largely been anthropocentric in its focus on human actors and interests, failing to recognise the impact of nonhumans in business and organisations. This leads to an incomplete understanding of organisational contexts that include key relationships with nonhuman animals. In addition, the limited scholarly attention paid to nonhumans as stakeholders has mostly been conceptual to date. Therefore, we develop a stakeholder theory with animals illustrated through two ethnographic case studies: an animal shelter and Nordic husky businesses. We focus our feminist reading of Driscoll and Starik’s (J Bus Ethics 49:55–73, 2004) stakeholder attributes for nonhumans and extend this to include affective salience built on embodied affectivity and knowledge, memories, action and care. Findings reveal that nonhuman animals are important actors in practice, affecting organisational operations through human–animal care relationships. In addition to confirming animals are stakeholders, we further contribute to stakeholder theory by offering ways to better listen to nontraditional actors.
Modification of cotton fabrics with 2-diethylaminoethyl chloride for salt-free dyeing with anionic dyes
Authors: Tang Peixin , Lockett Leilah-Marie E. , Zhang Mengxiao , Sun Gang 
Published: May 2021

AbstractA chemical modification of cotton fabrics by 2-diethylaminoethyl chloride (DEAE-Cl) was achieved, and the resulted cotton fabrics demonstrated salt-free dyeing properties with anionic dyes. Nucleophilic property of hydroxyl groups in cotton cellulose was enhanced under alkaline conditions and could react with DEAE-Cl, a chemical possessing both nucleophilic and electrophilic sites. The monolayered DEAE-grafted cotton cellulose could further react with DEAE-Cl to form multiple cationic quaternary ammonium salts (denoted as DEAE@Cotton), which are highly interactive with anionic dye molecules. The strong electrostatic interactions between the DEAE@Cotton and the dyes eliminated the use of inorganic salts in cotton dyeing process. The chemical structure and property of DEAE@Cotton were characterized and compared with untreated cotton. The DEAE@Cotton can be dyed in a salt-free system, and the dye exhaustion was faster than the conventional dyeing method due to the robust electrostatic interactions of the fabrics with anionic dyes. The dyed fabrics demonstrated outstanding color fastness under repeated washing, light exposure, and crocking. The dye adsorption process on DEAE@Cotton follows Langmuir isotherm model (R2 = 0.9667). The mechanism of enhanced dyeability was experimentally proved by treating the fabric with other anionic dyes in a salt-free system, proving the process to be environmentally friendly and cost-effective.
Graphic abstract
Oversized Area Indications on Bonus Packs Fail to Affect Consumers’ Transactional Decisions—More Experimental Evidence on the Mars Case
Authors: Purnhagen K. P. , van Herpen E. , Kamps S. , Michetti F. 
Published: May 2021

AbstractFindings from behavioural research are gaining increased interest in EU legislation, specifically in the area of unfair commercial practices. Prior research on the Mars case (Purnhagen and van Herpen 2017) has left open whether empirical evidence can provide an indication that this practice of using oversized indications of additional volume alters the transactional decision of consumers. This, however, is required to determine the “misleadingness” of such a practice in the legal sense as stipulated by the Unfair Commercial Practices Directive 2005/29/EC. The current paper closes this gap by illustrating how behavioural research can inform legal interpretation. In particular, it extends the previous research in two important ways: first, by examining the actual choice that people make; and second, by investigating whether the effects remain present in a context where a comparison product is available. Yet, while supporting and extending the findings of the study from Purnhagen and van Herpen (2017) on deceptiveness, the current study could not produce empirical evidence of a clear influence on the transactional decision of consumers, in the way “UCPD” requires.
Influence of Annular Dynamics and Material Behavior in Finite Element Analysis of Barlow’s Mitral Valve Disease
Authors: Aguilera Hans Martin , Urheim Stig , Skallerud Bjørn , Prot Victorien 
Published: May 2021

AbstractBarlow’s disease affects the entire mitral valve apparatus, by altering several of the fundamental mechanisms in the mitral valve which ensures unidirectional blood flow between the left atrium and the left ventricle. In this paper, a finite element model of a patient diagnosed with Barlow’s disease with patient-specific geometry and boundary conditions is presented. The geometry and boundary conditions are extracted from the echocardiographic assessment of the patient prior to surgery. Material properties representing myxomatous, healthy human and animal mitral valves are implemented and computed response are compared with each other and the echocardiographic images of the patient. This study shows that the annular dilation observed in Barlow’s patients controls several aspects of the mitral valve behavior during ventricular systole. The coaptation of the leaflets is observed to be highly dependent on annular dilation, and the coaptation area reduces rapidly at the onset of mitral regurgitation. Furthermore, the leaflet material implementation is important to predict lack of closure in the FE model correctly. It was observed that using healthy human material parameters in the Barlow’s diseased FE geometry gave severe lack of closure from the onset of mitral regurgitation, while myxomatous material properties showed a more physiological leakage.
Ariel planetary interiors White Paper
Authors: Helled Ravit , Werner Stephanie , Dorn Caroline , Guillot Tristan , Ikoma Masahiro , Ito Yuichi , Kama Mihkel , Lichtenberg Tim , Miguel Yamila , Shorttle Oliver , Tackley Paul J. , Valencia Diana , Vazan Allona 
Published: May 2021

AbstractThe recently adopted Ariel ESA mission will measure the atmospheric composition of a large number of exoplanets. This information will then be used to better constrain planetary bulk compositions. While the connection between the composition of a planetary atmosphere and the bulk interior is still being investigated, the combination of the atmospheric composition with the measured mass and radius of exoplanets will push the field of exoplanet characterisation to the next level, and provide new insights of the nature of planets in our galaxy. In this white paper, we outline the ongoing activities of the interior working group of the Ariel mission, and list the desirable theoretical developments as well as the challenges in linking planetary atmospheres, bulk composition and interior structure.
Plane polar Cremona maps of arbitrarily large degree in positive characteristic
Authors: Bignalet-Cazalet Rémi 
Published: May 2021

AbstractA result of I.V. Dolgachev states that the complex homaloidal polynomials in three variables, i.e. the complex homogeneous polynomials whose polar map is birational, are of degree at most three. In this note we describe homaloidal polynomials in three variables of arbitrarily large degree in positive characteristic. Using combinatorial arguments, we also classify line arrangements whose polar map is homaloidal in positive characteristic.
The Cyclical Return of the IQ Controversy: Revisiting the Lessons of the Resolution on Genetics, Race and Intelligence
Authors: Serpico Davide 
Published: May 2021

AbstractIn 1976, the Genetics Society of America (GSA) published a document entitled “Resolution of Genetics, Race, and Intelligence.” This document laid out the Society’s position in the IQ controversy, particularly that on scientific and ethical questions involving the genetics of intellectual differences between human populations. Since the GSA was the largest scientific society of geneticists in the world, many expected the document to be of central importance in settling the controversy. Unfortunately, the Resolution had surprisingly little influence on the discussion. In 1979, William Provine analyzed the possible factors that decreased the impact of the Resolution, among them scientists’ limited understanding of the relationship between science and ethics. Through the analysis of unpublished versions of the Resolution and exchanges between GSA members, I will suggest that the limited impact of the statement likely depended on a shift in the aims of the GSA due to the controversies that surrounded the preparation of the document. Indeed, the demands of the membership made it progressively more impartial in both scientific and political terms, decreasing its potential significance for a wider audience. Notably, the troubled history of the Resolution raises the question of what can make effective or ineffective the communication between scientists and the public—a question with resonance in past and present discussions on topics of social importance.
Quality of research as source and signal: revisiting the valorization process beyond substitution vs complementarity
Authors: Bonaccorsi Andrea , Blasi Brigida , Nappi Carmela Anna , Romagnosi Sandra 
Published: May 2021

AbstractIn recent years, the growing interest of universities in valorization of research activities (tipically through technology transfer—patenting and licensing—and academic entrepreneurship) has generated a debate on its impact on scientific knowledge production. There have been controversies on the potentially negative effect of university research valorization on public research, in terms of quality, long term vs short term orientation, and accessibility. The debate has been traditionally framed in terms of substitution vs complementarity between public research and valorization. In this paper we argue that the key to understand the relation between public research and valorization lies in the role of research funding, particularly: (a) competitive public research funding; (b) third party commercial funding. If the funding system (both public and private) takes the value of academic research as signal of quality, then high quality researchers are able to attract extra-funds beyond ordinary endowment. In turn, these additional funds can be used as a source to organize an effective and long-term division of labor in laboratories in order to support inventions and licensing (patents) and entrepreneurial activities (spin-off companies). In this case academic quality and commercialization are strong complement and positive feedback loops are generated. This interpretation on the role of funding is strongly supported by original data from the Italian Evaluation of Research Quality VQR 2011–2014 dataset. The paper is based on a unique and novel dataset, that integrates data on valorization of research activities at individual and institutional level on all the Italian universities and microdata on research quality on 32,616 researchers in STEM disciplines.
Path-pairability of infinite planar grids
Authors: Jobson Adam S. , Kézdy André E. , Lehel Jenő 
Published: May 2021

AbstractFor a given integer $$k\ge 1$$

k
≥
1

, a graph G with at least 2k vertices is called k-path-pairable, if for any set of k disjoint pairs of vertices, $$s_i,t_i$$

s
i

,

t
i

, $$1\le i\le k$$

1
≤
i
≤
k

, there exist pairwise edge-disjoint $$s_i,t_i$$

s
i

,

t
i

-paths in G. The path-pairability numberis the largest k such that G is k-path-pairable. Bounds on the path-pairability number are given here if G is the graph of infinite integer grids in the Euclidean plane. We prove that the path-pairability number of the integer quadrant is 4, and we show that the integer half-plane is 6-path-pairable and at most 7-path-pairable.
Image-based semi-multiscale finite element analysis using elastic subdomain homogenization
Authors: Jansson J. , Salomonsson K. , Olofsson J. 
Published: May 2021

AbstractIn this paper we present a semi-multiscale methodology, where a micrograph is split into multiple independent numerical model subdomains. The purpose of this approach is to enable a controlled reduction in model fidelity at the microscale, while providing more detailed material data for component level- or more advanced finite element models. The effective anisotropic elastic properties of each subdomain are computed using periodic boundary conditions, and are subsequently mapped back to a reduced mesh of the original micrograph. Alternatively, effective isotropic properties are generated using a semi-analytical method, based on averaged Hashin–Shtrikman bounds with fractions determined via pixel summation. The chosen discretization strategy (pixelwise or partially smoothed) is shown to introduce an uncertainty in effective properties lower than 2% for the edge-case of a finite plate containing a circular hole. The methodology is applied to a aluminium alloy micrograph. It is shown that the number of elements in the aluminium model can be reduced by $$99.89\%$$

99.89
%

while not deviating from the reference model effective material properties by more than $$0.65\%$$

0.65
%

, while also retaining some of the characteristics of the stress-field. The computational time of the semi-analytical method is shown to be several orders of magnitude lower than the numerical one.
Indefinites and free choice
Authors: Degano Marco , Aloni Maria 
Published: May 2021

AbstractIndefinites display a great functional variety and they give rise to different pragmatic effects. We focus on free choice indefinites and in particular on the Italian qualsiasi. Our aim is to reconstruct the grammaticalization path of this item and understand how diachronic data might shed some light on existing semantic theories of free choice. We employ corpus-based tools to build a database containing occurrences of qualsiasi from its origin and early forms to its current usage. We show that qualsiasi emerged from a particular unconditional construction and we outline the different stages which led to its grammaticalization. We analyze the compatibility of our diachronic study with formal accounts of free choice inferences, with a focus on Alternative Semantics analyses for indefinite pronouns and so-called grammatical theories of free choice. Our work shows that an integration between formal semantics and historical linguistics is fruitful and worth pursuing.