cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TIGRIS: An Informed Sampling-based Algorithm for Informative Path Planning
Creators: name: Moon, Brady
name: Chatterjee, Satrajit
name: Scherer, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Informative path planning is an important and challenging problem in robotics that remains to be solved in a manner that allows for wide-spread implementation and real-world practical adoption. Among various reasons for this, one is the lack of approaches that allow for informative path planning in high-dimensional spaces and non-trivial sensor constraints. In this work we present a sampling-based approach that allows us to tackle the challenges of large and high-dimensional search spaces. This is done by performing informed sampling in the high-dimensional continuous space and incorporating potential information gain along edges in the reward estimation. This method rapidly generates a global path that maximizes information gain for the given path budget constraints. We discuss the details of our implementation for an example use case of searching for multiple objects of interest in a large search space using a fixed-wing UAV with a forward-facing camera. We compare our approach to a sampling-based planner baseline and demonstrate how our contributions allow our approach to consistently out-perform the baseline by 18.0%. With this we thus present a practical and generalizable informative path planning framework that can be used for very large environments, limited budgets, and high dimensional search spaces, such as robots with motion constraints or high-dimensional configuration spaces.
description: 7 pages, 5 figures, IROS 2022
REVIEWS: The autobiography of Joseph Mayert of Quainton 1783-1839, edited by Ann Kussmaul; Seventy summers, by Tony Harman; A guide to the historic buildings of Milton Keynes, by Paul Woodfield and Milton Keynes Development Council
Creators: name: Baines, Arnold H J
name: Chenevix Trench, John
Publisher: name: Archaeology Data Service
Year: 2023

description: Records of Buckinghamshire, 28, 216-219
Teaching pragmatics to instructors of L2 Japanese: A relevance-theoretic approach
Creators: name: Marcet, Erika
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 47
subject: Language, communication and culture

description: There are few continuing professional development (CPD) courses for language instructors who want to incorporate the teaching of pragmatics, particularly outside second and foreign language (L2) English and Spanish (e.g., Cohen et al., 2023; Vellenga, 2011). Furthermore, most courses rarely include pragmatics theories that describe the cognitive processes involved in communication. To address this gap, this study assesses what pre-service and in-service instructors of L2 Japanese (n = 9) know about pragmatics and presents data from a 3-hCPD course. The CPD is based on Sperber & Wilson’s (1986/1995) Relevance Theory, an ostensive-inferential pragmatics theory that explains the cognitive mechanisms used to interpret utterances. These cognitive processes and how to teach them are explained through a pedagogical framework that equips instructors with the pragmatic knowledge and tools needed to help their learners achieve effective communication. A qualitative pre- and post-test was employed to ascertain instructors’ knowledge of pragmatics and ability to activate their pragmatic competence. Focus groups with each cohort were conducted to gather insights into instructors’ willingness and preparedness to teach pragmatics. The CPD increased both participants’ understanding of pragmatics and knowledge of how to activate learners’ pragmatic competence. The data also reveals differences between pre-service and in-service teachers, as well as native and non-native speakers’ willingness to include pragmatics in their teaching.
Self-Distillation from the Last Mini-Batch for Consistency Regularization
Creators: name: Shen, Yiqing
name: Xu, Liwu
name: Yang, Yuzhe
name: Li, Yaqian
name: Guo, Yandong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Knowledge distillation (KD) shows a bright promise as a powerful regularization strategy to boost generalization ability by leveraging learned sample-level soft targets. Yet, employing a complex pre-trained teacher network or an ensemble of peer students in existing KD is both time-consuming and computationally costly. Various self KD methods have been proposed to achieve higher distillation efficiency. However, they either require extra network architecture modification or are difficult to parallelize. To cope with these challenges, we propose an efficient and reliable self-distillation framework, named Self-Distillation from Last Mini-Batch (DLB). Specifically, we rearrange the sequential sampling by constraining half of each mini-batch coinciding with the previous iteration. Meanwhile, the rest half will coincide with the upcoming iteration. Afterwards, the former half mini-batch distills on-the-fly soft targets generated in the previous iteration. Our proposed mechanism guides the training stability and consistency, resulting in robustness to label noise. Moreover, our method is easy to implement, without taking up extra run-time memory or requiring model structure modification. Experimental results on three classification benchmarks illustrate that our approach can consistently outperform state-of-the-art self-distillation approaches with different network architectures. Additionally, our method shows strong compatibility with augmentation strategies by gaining additional performance improvement. The code is available at https://github.com/Meta-knowledge-Lab/DLB.
description: 10 pages
Méthodes pour la représentation informatisée de données lexicales / Methoden der Speicherung lexikalischer Daten
Creators: name: Romary, Laurent
name: Witt, Andreas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In recent years, new developments in the area of lexicography have altered not only the management, processing and publishing of lexicographical data, but also created new types of products such as electronic dictionaries and thesauri. These expand the range of possible uses of lexical data and support users with more flexibility, for instance in assisting human translation. In this article, we give a short and easy-to-understand introduction to the problematic nature of the storage, display and interpretation of lexical data. We then describe the main methods and specifications used to build and represent lexical data. This paper is targeted for the following groups of people: linguists, lexicographers, IT specialists, computer linguists and all others who wish to learn more about the modelling, representation and visualization of lexical knowledge. This paper is written in two languages: French and German.
description: This text comprises both a French and a German version
Upper and lower bound on delta-crossing number and tabulation of knots
Creators: name: Jablonowski, Michal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We will strengthen the known upper and lower bounds on the delta-crossing number of knots in therms of the triple-crossing number. The latter bound turns out to be strong enough to obtain (unknown values of) triple-crossing numbers for a few knots. We also prove that we can always find at least one tangle from the set of four tangles, in any triple-crossing projections of any non-trivial knot or non-split link. In the last section, we enumerate and generate tables of minimal delta-diagrams for all prime knots up to the delta-crossing number equal to four. We also give a concise survey about known inequalities between integer-valued classical knot invariants.
description: 11 pages
DETERMINATION OF PROTHROMBIN TIME, ACTIVATED PARTIAL THROMBOPLASTIN TIME AND PLATELET COUNT OF TYPE II DIABETES MELLITUS PATIENTS ATTENDING FELEGEHIWOT REFERRAL HOSPITAL, BAHIR DAR, NORTHWEST ETHIOPIA
Creators: name: Yitayal Amogne
Publisher: name: Zenodo
Year: 2015

description: Introduction: Diabetes mellitus is a metabolic disorder characterized with chronic hyperglycemia which results in polyuria, polydipsia and polyphagia. The incidence of cardiovascular disease (CVD) due to thrombosis is 2-4 folds greater in diabetic patients than the general population. Prothrombine time, activated partial thromboplastin time and platelet count are hematological indices that give an insight about the coagulation status of diabetic mellitus patients.

Objective: -To compare Prothrombin time, activated partial thromboplastin time and platelet count of type II diabetes mellitus patients attending Felegehiwot referral hospital, Bahir Dar, Northwest Ethiopia.

Method: A comparative cross-sectional study from March to April 2015 was carried out on a total of 40 treated type II diabetic, 40 untreated diabetics and 40 non-diabetic controls with similar age range of 30-60years.Simple random sampling technique was used to select study subjects of untreated DM and systematic sampling technique was used to select study subjects of both treated type II DM and non-diabetic individuals. Demographic data were collected through face to face interview and about 4ml of blood was collected aseptically by Felegehiwot referral hospital laboratory staff. The collected data was entered and analyzed through SPSS ver 16.One-way Anova and independent t-test were used to compare means of PT, aPTT and platelet count. P <0.05 was considered as statically significant.
Linear response of a one-dimensional conductor coupled to a dynamical impurity with a Fermi edge singularity
Creators: name: Snyman, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: I study the dynamical correlations that a quantum impurity induces in the Fermi sea to which it is coupled. I consider a quantum transport set-up in which the impurity can be realised in a double quantum dot. The same Hamiltonian describes tunnelling states in metallic glasses, and can be mapped onto the Ohmic spin-boson model. It exhibits a Fermi edge singularity, i.e. many fermion correlations result in an impurity decay rate with a non-trivial power law energy dependence. I show that there is a simple relation between temporal impurity correlations on the one hand, and the linear response of the Fermi sea to external perturbations on the other. This results in a power law singularity in the space and time dependence of the non-local polarisability of the Fermi sea, which can be detected in transport experiments.
description: 11 Pages. Typo in Abstract corrected
Landau-Stark states and edge-induced Bloch oscillations in topological lattices
Creators: name: Chesnokov, Iliya Yu.
name: Kolovsky, Andrey R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider dynamics of a charged particle in a finite along the $x$ direction square lattice in the presence of normal to the lattice plane magnetic field and in-plane electric field aligned with the $y$ axis. For vanishing magnetic field this dynamics would be common Bloch oscillations where the particle oscillates in the $y$ direction with amplitude inverse proportional to the electric field. We show that a non-zero magnetic field crucially modifies this dynamics. Namely, the new Bloch oscillations consist of time intervals where the particle moves with constant velocity in the $x$ direction intermitted by intervals where it is accelerated or decelerated along the lattice edges. The analysis is done in terms of the Landau-Stark states which are eigenstates of a quantum particle in a two-dimensional lattice subject to (real or synthetic) electric and magnetic fields.
description: epl-style, 9 pages, 5 figures
Learning Speech Emotion Representations in the Quaternion Domain
Creators: name: Guizzo, Eric
name: Weyde, Tillman
name: Scardapane, Simone
name: Comminiello, Danilo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The modeling of human emotion expression in speech signals is an important, yet challenging task. The high resource demand of speech emotion recognition models, combined with the the general scarcity of emotion-labelled data are obstacles to the development and application of effective solutions in this field. In this paper, we present an approach to jointly circumvent these difficulties. Our method, named RH-emo, is a novel semi-supervised architecture aimed at extracting quaternion embeddings from real-valued monoaural spectrograms, enabling the use of quaternion-valued networks for speech emotion recognition tasks. RH-emo is a hybrid real/quaternion autoencoder network that consists of a real-valued encoder in parallel to a real-valued emotion classifier and a quaternion-valued decoder. On the one hand, the classifier permits to optimize each latent axis of the embeddings for the classification of a specific emotion-related characteristic: valence, arousal, dominance and overall emotion. On the other hand, the quaternion reconstruction enables the latent dimension to develop intra-channel correlations that are required for an effective representation as a quaternion entity. We test our approach on speech emotion recognition tasks using four popular datasets: Iemocap, Ravdess, EmoDb and Tess, comparing the performance of three well-established real-valued CNN architectures (AlexNet, ResNet-50, VGG) and their quaternion-valued equivalent fed with the embeddings created with RH-emo. We obtain a consistent improvement in the test accuracy for all datasets, while drastically reducing the resources' demand of models. Moreover, we performed additional experiments and ablation studies that confirm the effectiveness of our approach. The RH-emo repository is available at: https://github.com/ispamm/rhemo.
description: Accepted for Publication in IEEE/ACM Transactions on Audio, Speech and Language Processing
Electronic supporting file: Sexual dimorphism in trait variability and its eco-evolutionary and statistical implications
Creators: name: Zajitschek, Susanne
name: Zajitschek, Felix
name: Bonduriansky, Russell
name: Brooks, Robert C.
name: Cornwell, Will
name: Falster, Daniel
name: Malgorzata Lagisz
name: Mason, Jeremy
name: Senior, Alistair
name: Noble, Daniel
name: Nakagawa, Shinichi
Publisher: name: Zenodo
Year: 2020

description: This is an electronic supporting file for the publication: https://elifesciences.org/articles/63170 The HTML file can be viewed online here: https://rpubs.com/SusZaj/ESF and is based on a R markdown script (.rmd also submitted), which has been developed for the analysis of a data set of mouse traits (raw data: https://zenodo.org/deposit/3759701). More locations with our shared resources: OSF https://osf.io/25h4t/, GitHub https://github.com/itchyshin/mice_sex_diff
Non-detection of CHIME/FRB sources with the Arecibo Observatory
Creators: name: Good, Deborah C.
name: Chawla, Pragya
name: Fonseca, Emmanuel
name: Kaspi, Victoria
name: Meyers, B. W.
name: Pleunis, Ziggy
name: Sand, Ketan R.
name: Scholz, Paul
name: Stairs, I. H.
name: Tendulkar, Shriharsh P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this work, we present follow-up observations of two known repeating fast radio bursts (FRBs) and seven non-repeating FRBs with complex morphology discovered with CHIME/FRB. These observations were conducted with the Arecibo Observatory 327 MHz receiver. We detected no additional bursts from these sources, nor did CHIME/FRB detect any additional bursts from these sources during our follow-up program. Based on these non-detections, we provide constraints on the repetition rate, for all nine sources. We calculate repetition rates above 1 Jy using both a Poisson distribution of repetition and the Weibull distribution of repetition presented by Oppermann et al. (2018). For both distributions, we find repetition upper limits of the order $λ= 10^{-2} - 10^{-1} \text{hr}^{-1}$ for all sources. These rates are much lower than those recently published for notable repeating FRBs like FRB 20121102A and FRB 20201124A, suggesting the possibility of a low-repetition sub-population.
description: 12 pages, 4 figures, 5 tables
The semiclassical energy density of kinks and solitons
Creators: name: Martin, Maria Angeles Alberti
name: Schlesier, Robert
name: Zahn, Jochen
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute semiclassical corrections to the energy density of kinks in $ϕ^4$ theory and of solitons in the sine-Gordon model in $1+1$ dimensions, using local and covariant renormalization techniques from quantum field theory in curved spacetimes. For the semiclassical correction to the energy, we recover the known results. Our analysis highlights a subtlety in the definition of a conserved stress tensor for scalar field theories in $1+1$ dimension.
description: 20 pages; Mathematica notebooks containing the relevant calculations as ancillary files; v3: final version
A simulation of convective dynamo in the solar convective envelope: maintenance of the solar-like differential rotation and emerging flux
Creators: name: Fan, Yuhong
name: Fang, Fang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the results of a magneto-hydrodynamic (MHD) simulation of a convective dynamo in a model solar convective envelope driven by the solar radiative diffusive heat flux. The convective dynamo produces a large-scale mean magnetic field that exhibits irregular cyclic behavior with oscillation time scales ranging from about 5 to 15 years and undergoes irregular polarity reversals. The mean axisymmetric toroidal magnetic field is of opposite signs in the two hemispheres and is concentrated at the bottom of the convection zone. The presence of the magnetic fields is found to play an important role in the self-consistent maintenance of a solar-like differential rotation in the convective dynamo model. Without the magnetic fields, the convective flows drive a differential rotation with a faster rotating polar region. In the midst of magneto-convection, we found emergence of strong super-equipartition flux bundles at the surface, exhibiting properties that are similar to emerging solar active regions.
description: 32 pages, 13 figures, accepted for publication in the Astrophysical Journal
title: Food Web Structure in the Canadian Subarctic: Implications for Harp Seals
Creators: name: Doherty, Edward
Publisher: name: University of Liverpool Repository
Year: 2023

description: The Arctic is warming by nearly four times the rate of the global average, leading to changing ocean conditions that have far-reaching consequences for marine ecosystems. Effective ecosystem-based management strategies are therefore essential for preserving the health and resilience of these ecosystems amidst the challenges posed by climate change. Subarctic regions serve as an interface between Arctic and temperate waters, offering a unique and accessible setting to observe marine populations at the fringes of their respective ecosystems and to monitor their responses to environmental shifts. The Newfoundland shelf in the Northwest Atlantic (NWA) is a highly productive region of the subarctic, supporting multiple commercial fisheries, that has experienced considerable restructuring of its marine food web since the early 1990s. Recent observations of variability in the ice conditions (e.g., timing of retreat, extent and thickness), zooplankton community composition, fish biomass and marine mammal population dynamics highlight the need for a holistic analysis of the NWA shelf food web that incorporates multiple functional groups and trophic levels. For this PhD thesis, I used stable isotope analysis of bulk tissues and individual amino acids to: 
(1) Quantify trophic discrimination factors (TDFs) for multiple functional groups and tissues, and found that TDFs did not differ between tissues, but did decrease with increasing trophic position (TP), being largest in zooplankton (6.9‰) and lowest in harp seals (3.1‰). Though speculative, the mechanisms likely responsible for this are diet quality and mode of excretion (urea/uric acid vs. ammonia). This has implications for accurate calculations of TP and our interpretations of food web structure more broadly.
(2) Characterise the structure of the NWA food web between 2012 and 2018. The isotopic baseline, as proxied by the
Transport and entanglement growth in long-range random Clifford circuits
Creators: name: Richter, Jonas
name: Lunt, Oliver
name: Pal, Arijeet
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Conservation laws can constrain entanglement dynamics in isolated quantum systems, manifest in a slowdown of higher Rényi entropies. Here, we explore this phenomenon in a class of long-range random Clifford circuits with U$(1)$ symmetry where transport can be tuned from diffusive to superdiffusive. We unveil that the different hydrodynamic regimes reflect themselves in the asymptotic entanglement growth according to $S(t) \propto t^{1/z}$, where the dynamical transport exponent $z$ depends on the probability $\propto r^{-α}$ of gates spanning a distance $r$. For sufficiently small $α$, we show that the presence of hydrodynamic modes becomes irrelevant such that $S(t)$ behaves similarly in circuits with and without conservation law. We explain our findings in terms of the inhibited operator spreading in U$(1)$-symmetric Clifford circuits, where the emerging light cones can be understood in the context of classical Lévy flights. Our work sheds light on the connections between Clifford circuits and more generic many-body quantum dynamics.
description: 8 pages, 4 figures (+11 pages, 10 figures)
Modal Decomposition in Goalpost Micro/nano Electro-mechanical Devices
Creators: name: Collin, Eddy
name: Defoort, Martial
name: Lulla, Kunal
name: Blanc, Christophe
name: Guidi, Jean
name: Dufresnes, Sebastien
name: Bourgeois, Olivier
name: Godfrin, Henri
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied the first three symmetric out-of-plane flexural resonance modes of a goalpost silicon micro-mechanical device. Measurements have been performed at 4.2K in vacuum, demonstrating high Qs and good linear properties. Numerical simulations have been realized to fit the resonance frequencies and produce the mode shapes. These mode shapes are complex, since they involve distortions of two coupled orthogonal bars. Nonetheless, analytic expressions have been developed to reproduce these numerical results, with no free parameters. Owing to their generality they are extremely helpful, in particular to identify the parameters which may limit the performances of the device. The overall agreement is very good, and has been verified on our nano-mechanical version of the device.
description: Journal of Low Temperature Physics (2013)
Πορτρέτα Αισώπου και Σωκράτη και το ιδανικό της ασχήμιας
Creators: name: Κυργιαλάνη, Ειρήνη Μαρία Βύρωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Αίσωπος
Σωκράτης
Πορτρέτο
Aesop
Socrates
Portrait

description: Στην παρούσα μεταπτυχιακή διατριβή συγκεντρώνονται οι σωζόμενες απεικονίσεις του Αισώπου και του Σωκράτη στην πλαστική τέχνη και άλλα εικαστικά μέσα με σκοπό την παρουσίαση των δυσειδών φυσιογνωμικών χαρακτηριστικών τους. Στο κύριο μέρος της εργασίας εξετάζονται οι απεικονίσεις του Αισώπου καθώς και οι σωζόμενες αρχαίες γραμματειακές πηγές που αναφέρονται στην εξωτερική του εμφάνιση. Στη συνέχεια, πραγματοποιείται εξέταση των πορτρέτων και άλλων απεικονίσεων του Σωκράτη συνοδευμένη από την παράθεση σωζόμενων περιγραφών των φυσιογνωμικών χαρακτηριστικών του φιλοσόφου όπως εντοπίζονται στις αρχαίες γραμματειακές μαρτυρίες. Οι περιγραφές των εξωτερικών χαρακτηριστικών των δύο αυτών πνευματικών ανδρών παρουσιάζονται με σκοπό να διαπιστωθεί αν και κατά πόσο συγκλίνουν με τις απεικονίσεις τους στην αρχαία τέχνη. Τέλος, επιχειρείται η παρουσίαση του ιδανικού της ασχήμιας μέσα από μαρτυρίες της αρχαίας γραμματείας και απεικονίσεις άλλων πνευματικών ανδρών της αρχαιότητας
description: In the present thesis, the surviving depictions of Aesop and Socrates in plastic art and other visual means are collected in order to present their dual physiognomic features. The main part of the thesis examines the depictions of Aesop as well as the surviving ancient literary sources that refer to his external appearance. Then, an examination of portraits and other depictions of Socrates is presented, accompanied by the citation of extant descriptions of the philosopher's physiognomic features as identified in the ancient literary evidence. The descriptions of the external features of these two intellectual men are presented in order to determine whether and to what extent they converge with their own depictions in ancient art. Finally, an attempt is made to demonstrate the ideal of ugliness through the testimonies of ancient literature and depictions of other spiritual men of antiquity
Landau theory for finite-time dynamical phase transitions
Creators: name: Meibohm, Jan
name: Esposito, Massimiliano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the time evolution of thermodynamic observables that characterise the dissipative nature of thermal relaxation after an instantaneous temperature quench. Combining tools from stochastic thermodynamics and large-deviation theory, we develop a powerful theory for computing the large-deviation statistics of such observables. Our method naturally leads to a description in terms of a dynamical Landau theory, a versatile tool for the analysis of finite-time dynamical phase transitions. The topology of the associated Landau potential allows for an unambiguous identification of the dynamical order parameter and of the phase diagram. As an immediate application of our method, we show that the probability distribution of the heat exchanged between a mean-field spin model and the environment exhibits a singular point, a kink, caused by a finite-time dynamical phase transition. Using our Landau theory, we conduct a detailed study of the phase transition. Although the manifestation of the new transition is similar to that of a previously found finite-time transition in the magnetisation, the properties and the dynamical origins of the two turn out to be very different.
description: 30 pages, 9 figures
The Dark Dimension and the Swampland
Creators: name: Montero, Miguel
name: Vafa, Cumrun
name: Valenzuela, Irene
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by principles from the Swampland program, which characterize requirements for a consistent UV completion of quantum gravity, combined with observational data, we are led to a unique corner of the quantum gravity landscape. In particular, using the Distance/Duality conjecture and the smallness of dark energy, we predict the existence of a light tower of states and a unique extra mesoscopic dimension of length $l\sim Λ^{-\frac{1}{4}}\sim 10^{-6}\, m$, with extra massless fermions propagating on it. This automatically leads to a candidate for a tower of sterile neutrinos, and an associated active neutrino mass scale $m_ν\sim \langle H\rangle^2\, Λ^{-\frac{1}{12}}M_{pl}^{-\frac{2}{3}}$. Moreover, assuming the mechanism for stabilization of this dark dimension leads to similar masses for active and sterile neutrinos we are led to the prediction of a Higgs vev $\langle H\rangle \sim Λ^{\frac{1}{6}}M_{pl}^{\frac{1}{3}}$. Another prediction of the scenario is a species scale ${\hat M} \sim Λ^ {\frac{1}{12}}M_{pl}^{\frac{2}{3}}\sim 10^{9}-10^{10} GeV$, corresponding to the higher-dimensional Planck scale. This energy scale may be related to the resolution of the instability of the Higgs effective potential present at a scale of $\sim 10^{11}\, GeV$. We also speculate about the interplay between this energy scale and the GZK limit on ultra-high energy cosmic rays.
description: 13 pages + refs; 2 figures. v2: further details and references added; v3: Published version
lpSpikeCon: Enabling Low-Precision Spiking Neural Network Processing for Efficient Unsupervised Continual Learning on Autonomous Agents
Creators: name: Putra, Rachmad Vidya Wicaksana
name: Shafique, Muhammad
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: Hardware Architecture (cs.AR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent advances have shown that SNN-based systems can efficiently perform unsupervised continual learning due to their bio-plausible learning rule, e.g., Spike-Timing-Dependent Plasticity (STDP). Such learning capabilities are especially beneficial for use cases like autonomous agents (e.g., robots and UAVs) that need to continuously adapt to dynamically changing scenarios/environments, where new data gathered directly from the environment may have novel features that should be learned online. Current state-of-the-art works employ high-precision weights (i.e., 32 bit) for both training and inference phases, which pose high memory and energy costs thereby hindering efficient embedded implementations of such systems for battery-driven mobile autonomous systems. On the other hand, precision reduction may jeopardize the quality of unsupervised continual learning due to information loss. Towards this, we propose lpSpikeCon, a novel methodology to enable low-precision SNN processing for efficient unsupervised continual learning on resource-constrained autonomous agents/systems. Our lpSpikeCon methodology employs the following key steps: (1) analyzing the impacts of training the SNN model under unsupervised continual learning settings with reduced weight precision on the inference accuracy; (2) leveraging this study to identify SNN parameters that have a significant impact on the inference accuracy; and (3) developing an algorithm for searching the respective SNN parameter values that improve the quality of unsupervised continual learning. The experimental results show that our lpSpikeCon can reduce weight memory of the SNN model by 8x (i.e., by judiciously employing 4-bit weights) for performing online training with unsupervised continual learning and achieve no accuracy loss in the inference phase, as compared to the baseline model with 32-bit weights across different network sizes.
description: To appear at the 2022 International Joint Conference on Neural Networks (IJCNN), the 2022 IEEE World Congress on Computational Intelligence (WCCI), July 2022, Padova, Italy
BiFeO3/La0.7Sr0.3MnO3 heterostructures deposited on Spark Plasma Sintered LaAlO3 Substrates
Creators: name: Pravarthana, D.
name: Trassin, M.
name: Chu, Jiun Haw
name: Lacotte, M.
name: David, A.
name: Ramesh, R.
name: Salvador, P. A.
name: Prellier, W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Multiferroic BiFeO3 (BFO) / La0.7Sr0.3MnO3 heterostructured thin films were grown by pulsed laser deposition on polished spark plasma sintered LaAlO3 (LAO) polycrystalline substrates. Both polycrystalline LAO substrates and BFO films were locally characterized using electron backscattering diffraction (EBSD), which confirmed the high-quality local epitaxial growth on each substrate grain. Piezoforce microscopy was used to image and switch the piezo-domains, and the results are consistent with the relative orientation of the ferroelectric variants with the surface normal. This high-throughput synthesis process opens the routes towards wide survey of electronic properties as a function of crystalline orientation in complex oxide thin film synthesis.
description: 10 pages, 4 figures, Submitted to Applied Physics Letters
On Elliptic Lax Systems on the Lattice and a Compound Theorem for Hyperdeterminants
Creators: name: Delice, N.
name: Nijhoff, F. W.
name: Yoo-Kong, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A general elliptic $N\times N$ matrix Lax scheme is presented, leading to two classes of elliptic lattice systems, one which we interpret as the higher-rank analogue of the Landau-Lifschitz equations, while the other class we characterize as the higher-rank analogue of the lattice Krichever-Novikov equation (or Adler's lattice). We present the general scheme, but focus mainly of the latter type of models. In the case $N=2$ we obtain a novel Lax representation of Adler's elliptic lattice equation in its so-called 3-leg form. The case of rank $N=3$ is analysed using Cayley's hyperdeterminant of format $2\times2\times2$, yielding a multi-component system of coupled 3-leg quad-equations.
Discriminating single-photon states unambiguously in high dimensions
Creators: name: Agnew, Megan
name: Bolduc, Eliot
name: Resch, Kevin J.
name: Franke-Arnold, Sonja
name: Leach, Jonathan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ability to uniquely identify a quantum state is integral to quantum science, but for non-orthogonal states, quantum mechanics precludes deterministic, error-free discrimination. However, using the non-deterministic protocol of unambiguous state discrimination (USD) enables error-free differentiation of states, at the cost of a lower frequency of success. We discriminate experimentally between non-orthogonal, high-dimensional states encoded in single photons; our results range from dimension $d=2$ to $d=14$. We quantify the performance of our method by comparing the total measured error rate to the theoretical rate predicted by minimum-error state discrimination. For the chosen states, we find a lower error rate by more than one standard deviation for dimensions up to $d=12$. This method will find immediate application in high-dimensional implementations of quantum information protocols, such as quantum cryptography.
description: 4 pages + 3 pages supplementary, 4 figures
Momentum Stiefel Optimizer, with Applications to Suitably-Orthogonal Attention, and Optimal Transport
Creators: name: Kong, Lingkai
name: Wang, Yuqing
name: Tao, Molei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Dynamical Systems (math.DS)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The problem of optimization on Stiefel manifold, i.e., minimizing functions of (not necessarily square) matrices that satisfy orthogonality constraints, has been extensively studied. Yet, a new approach is proposed based on, for the first time, an interplay between thoughtfully designed continuous and discrete dynamics. It leads to a gradient-based optimizer with intrinsically added momentum. This method exactly preserves the manifold structure but does not require additional operation to keep momentum in the changing (co)tangent space, and thus has low computational cost and pleasant accuracy. Its generalization to adaptive learning rates is also demonstrated. Notable performances are observed in practical tasks. For instance, we found that placing orthogonal constraints on attention heads of trained-from-scratch Vision Transformer [Dosovitskiy et al. 2022] could markedly improve its performance, when our optimizer is used, and it is better that each head is made orthogonal within itself but not necessarily to other heads. This optimizer also makes the useful notion of Projection Robust Wasserstein Distance [Paty & Cuturi 2019; Lin et al. 2020] for high-dim. optimal transport even more effective.
description: Code: https://github.com/konglk1203/VariationalStiefelOptimizer
Large-Scale Structure Formation: from the first non-linear objects to massive galaxy clusters
Creators: name: Planelles, S.
name: Schleicher, D. R. G.
name: Bykov, A. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The large-scale structure of the Universe formed from initially small perturbations in the cosmic density field, leading to galaxy clusters with up to 10^15 Msun at the present day. Here, we review the formation of structures in the Universe, considering the first primordial galaxies and the most massive galaxy clusters as extreme cases of structure formation where fundamental processes such as gravity, turbulence, cooling and feedback are particularly relevant. The first non-linear objects in the Universe formed in dark matter halos with 10^5-10^8 Msun at redshifts 10-30, leading to the first stars and massive black holes. At later stages, larger scales became non-linear, leading to the formation of galaxy clusters, the most massive objects in the Universe. We describe here their formation via gravitational processes, including the self-similar scaling relations, as well as the observed deviations from such self-similarity and the related non-gravitational physics (cooling, stellar feedback, AGN). While on intermediate cluster scales the self-similar model is in good agreement with the observations, deviations from such self-similarity are apparent in the core regions, where numerical simulations do not reproduce the current observational results. The latter indicates that the interaction of different feedback processes may not be correctly accounted for in current simulations. Both in the most massive clusters of galaxies as well as during the formation of the first objects in the Universe, turbulent structures and shock waves appear to be common, suggesting them to be ubiquitous in the non-linear regime.
description: Review article. Accepted for publication in Space Science Reviews. It will appear as a contribution to an ISSI book
Suppression of antiferromagnetic order and hybridization gap by electron- and hole-doping in the Kondo semiconductor CeOs$_{2}$Al$_{10}$
Creators: name: Kawabata, J.
name: Takabatake, T.
name: Umeo, K.
name: Muro, Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Kondo semiconductor CeOs$_{2}$Al$_{10}$ exhibits an antiferromagnetic (AFM) order at $T_\mathrm{N}= 28.5$ K, whose temperature is unexpectedly high for the small ordered moment of $0.3$ $μ_\mathrm{B}/$Ce. We have studied the effects of electron- and hole-doping on the hybridization gap and AFM order by measuring the magnetization $M$, magnetic susceptibility $χ$, electrical resistivity $ρ$, and specific heat $C$ on single crystals of Ce(Os$_{1-x}$Ir$_{x}$)$_{2}$Al$_{10}$($x \le 0.15$) and Ce(Os$_{1-y}$Re$_{y}$)$_{2}$Al$_{10}$($y \le 0.1$). The results of $M (B)$ indicates that the AFM ordered moment $μ_\mathrm{AF}$ changes the direction from the $c$-axis for $x = 0$ to the $a$-axis for $x = 0.03$. With increasing $x$ up to 0.15, $T_\mathrm{N}$ gradually decreases although the $4f$ electron state becomes localized and the magnitude of $μ_\mathrm{AF}$ is increased to $1$ $μ_\mathrm{B}/$Ce. With increasing $y$, the $4f$ electron state is more delocalized and the AFM order disappears at a small doping level $y = 0.05$. In both electron- and hole-doped systems, the suppression of $T_\mathrm{N}$ is well correlated with the increase of the Sommerfeld coefficient $γ$ in $C(T)$. Furthermore, the simultaneous suppression of $T_\mathrm{N}$ and the semiconducting gap in $ρ(T)$ at $T > T_\mathrm{N}$ indicates that the presence of the hybridization gap is indispensable for the unusual AFM order in CeOs$_{2}$Al$_{10}$.
description: 16 pages, 7 figures, submitted to Phys. Rev. B
Where are the Poor: Ethiopia summary
Creators: name: START Center
name: Friedman, Morgan
name: Secor, Andrew
name: Chen, Wei-Ming
name: Badshah, Akhtar
Publisher: name: Gates Open Research
Year: 2023

description: The START team researched the levels of poverty, the lifestyles of those living in poverty, and the current state of financial inclusion in Bangladesh and Ethiopia at a national and subnational level.
Birth asphyxia burden assessment and landscaping
Creators: name: Grayson, Shira
name: Secor, Andrew
name: Hergott, Dianna
name: Jairam Lingappa
name: START Center
Publisher: name: Gates Open Research
Year: 2023

description: The START Team performed a targeted literature search to assess current interventions for neonatal hypoxic ischemic encephalopathy (HIE), specifically those that show promise in low- and middle-income countries (LMICs).
A multiple system of high-mass YSOs surrounded by disks in NGC7538 IRS1
Creators: name: Moscadelli, Luca
name: Goddi, Ciriaco
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: NGC7538 IRS1 is considered the best high-mass accretion disk candidate around an O-type young star in the northern hemisphere. We investigated the 3D kinematics and dynamics of circumstellar gas with very high linear resolution, from tens to 1500 AU, with the ultimate goal of building a comprehensive dynamical model for this YSO. We employed four different observing epochs of EVN data at 6.7 GHz, spanning almost eight years, which enabled us to measure, besides line-of-sight (l.o.s.) velocities and positions, also l.o.s. accelerations and proper motions of methanol masers. In addition, we imaged with the JVLA-B array highly-excited ammonia inversion lines, from (6,6) to (13,13), which enabled us to probe the hottest molecular gas very close to the exciting source(s). We found five 6.7 GHz maser clusters which are distributed over a region extended N-S across ~1500 AU and are associated with three peaks of the radio continuum. We proposed that these maser clusters identify three individual high-mass YSOs, named IRS1a, IRS1b, and IRS1c. We modeled the maser clusters in IRS1a and IRS1b in terms of edge-on disks in centrifugal equilibrium. In the first case, masers may trace a quasi-Keplerian thin disk, orbiting around a high-mass YSO, IRS1a, of up to 25 solar masses. This YSO dominates the bolometric luminosity of the region. The second disk is both massive (<16 Msun within ~500 AU) and thick, and the mass of the central YSO, IRS1b, is constrained to be at most a few solar masses. In summary, we present compelling evidence that NGC7538 IRS1 is not forming just one single high-mass YSO, but consists of a multiple system of high-mass YSOs, which are surrounded by accretion disks, and are probably driving individual outflows. This new model naturally explains all the different orientations and disk/outflow structures proposed for the region in previous models.
description: 34 pages, 18 figures, accepted for publication in Astronomy & Astrophysics
Ο Θεσμικός Ρόλος του Εισαγγελέα στην Ακούσια Νοσηλεία
Creators: name: Κετσιατζή, Εμμανουέλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: subject: Ψυχική Νόσος
subject: Νόμος
subject: Εισαγγελέας
subject: Mental Illness
subject: Law
subject: FOS: Law
subject: District Attorney

description: Η παρούσα διπλωματική εργασία τιτλοφορείται ΄΄ Ο ΘΕΣΜΙΚΟΣ ΡΟΛΟΣ ΤΟΥ ΕΙΣΑΓΓΕΛΕΑ ΣΤΗΝ ΑΚΟΥΣΙΑ ΝΟΣΗΛΕΙΑ΄΄ και εκπονείται υπό του πλαισίου του προγράμματος μεταπτυχιακών σπουδών της Σχολής Επιστημών Υγείας του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης ΄΄ ΙΑΤΡΟΔΙΚΑΣΤΙΚΗ – ΨΥΧΙΑΤΡΟΔΙΚΑΣΤΙΚΗ ΄΄ . Αποτελείται από τέσσερις [ 4] ενότητες – κεφάλαια στα οποία πραγματεύεται Α] ψυχική νόσο και ιστορική αναδρομή [ κεφ. 1ο ] , Β] ανθρώπινα δικαιώματα, ψυχική ασθένεια , περίθαλψη ψυχικά πασχόντων , Ν. ΨΜΒ του 1862, Ν.Δ. 104/1973 , κοινωνική ψυχιατρική και ψυχιατρική μεταρρύθμιση [κεφ. 2ο ] , Γ] δικαιώματα ψυχικά πάσχοντος , ελευθερία και κράτηση ψυχικά πασχόντων κατά την ΕΣΔΑ [κεφ. 3ο ] , Δ] Ν. 2071/1992 , προυποθέσεις επιβολής της ακούσιας νοσηλείας , δικαστική διαδικασία , δικαιώματα ασθενή, διάρκεια , υλοποίηση , υπουργικές αποφάσεις , [ κεφ. 4ο ] και εν κατακλείδι το θεσμικό ρόλο που έχει να επιτελέσει ο Εισαγγελικός Λειτουργός στη μάχη για τα Ανθρώπινα Δικαιώματα ως εγγυητής των ατομικών και κοινωνικών δικαιωμάτων των πολιτών και επέκεινα των ψυχικά πασχόντων
description: This dissertation is titled ‘’ The institutional role of the district attorney / prosecutor in involuntary hospitalization of persons suffering from mental disorders’’ and is being prepared in the context of the postgraduate Diploma Program. It consists of four [4] chapters in which it deals with i] mental illness and historical retrogression, ii] human rights , mental health care, social psychiatry and psychiatric reform, iii] mental health rights, freedom and detention according to the European Convention on Human Rights , iiii] law 2071/1992 , assumptions, judicial process, rights , duration, implementation and in conclusion the institutional role of the prosecutor in the fight for human rights as a guarantor of the individual and social rights of citizens and the mentally ill
High pressure tuning of magnon-polarons in the layered antiferromagnet FePS$_3$
Creators: name: Pawbake, Amit
name: Pelini, Thomas
name: Delhomme, Alex
name: Romanin, Davide
name: Vaclavkova, Diana
name: Martinez, Gerard
name: Calandra, Matteo
name: Measson, Marie-Aude
name: Veis, Martin
name: Potemski, Marek
name: Orlita, Milan
name: Faugeras, Clement
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Magnetic layered materials have emerged recently as promising systems to introduce magnetism in structures based on two-dimensional (2D) materials and to investigate exotic magnetic ground states in the 2D limit. In this work, we apply high hydrostatic pressures up to P = 8.7 GPa to the bulk layered antiferromagnet FePS$_3$ to tune the collective lattice excitations (phonons) in resonance with magnetic excitations (magnons). Close to P = 4 GPa, the magnon-phonon resonance is achieved and the strong coupling between these collective modes leads to the formation of new quasi-particles, the magnon-polarons, evidenced in our low temperature Raman scattering experiments by a particular avoided crossing behavior between the phonon and the doubly degenerate antiferromagnetic magnon. At the pressure-induced magnon-phonon resonance, three distinct coupled modes emerge. As it is mainly defined by intralayer properties, we show that the energy of the magnon is nearly pressure independent. We additionally apply high magnetic fields up to B = 30 T to fully identify and characterize the magnon excitations, and to explore the different magnon-polaron regimes for which the phonon has an energy lower-, equal to-, or higher- than the magnon energy. The description of our experimental data requires introducing a phonon-phonon coupling not taken into account in actual calculations.
description: 11 pages + 6 pages of supplementary materials