cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Robotic Playing for Hierarchical Complex Skill Learning
Creators: name: Hangl, Simon
name: Ugur, Emre
name: Szedmak, Sandor
name: Piater, Justus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In complex manipulation scenarios (e.g. tasks requiring complex interaction of two hands or in-hand manipulation), generalization is a hard problem. Current methods still either require a substantial amount of (supervised) training data and / or strong assumptions on both the environment and the task. In this paradigm, controllers solving these tasks tend to be complex. We propose a paradigm of maintaining simpler controllers solving the task in a small number of specific situations. In order to generalize to novel situations, the robot transforms the environment from novel situations into a situation where the solution of the task is already known. Our solution to this problem is to play with objects and use previously trained skills (basis skills). These skills can either be used for estimating or for changing the current state of the environment and are organized in skill hierarchies. The approach is evaluated in complex pick-and-place scenarios that involve complex manipulation. We further show that these skills can be learned by autonomous playing.
description: Published at IROS2016 (http://www.iros2016.org/)
Ionic Diffusion and Electronic Transport in Eldfellite Na$_x$Fe(SO$_4$)$_2$
Creators: name: Yu, Chol-Jun
name: Choe, Song-Hyok
name: Ri, Gum-Chol
name: Kim, Sung-Chol
name: Ryo, Hyok-Su
name: Kim, Yong-Jin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Discovering new electrodes for sodium-ion battery requires clear understanding of the material process during battery operation. Using first-principles calculations, we identify mechanisms of ionic diffusion and electronic transfer in newly developed cathode material, eldfellite Na$_x$Fe(SO$_4$)$_2$, reproducing the electrochemical properties in good agreement with experiment. The inserted sodium atom is suggested to diffuse along the two-dimensional pathway with preceding movement of the host sodium atom, and the activation energy is calculated to be reasonable for fast insertion. We calculate the electronic properties, showing the band insulating at low composition of inserted sodium, for which the electron polaron formation and hoping are also suggested. Our results may contribute to opening a new way of developing innovative cathode materials based on iron and sulfate ion.
Magnetic excitations in the S = 1/2 antiferromagnetic-ferromagnetic chain compound BaCu2V2O8 at zero and finite temperature
Creators: name: Klyushina, E. S.
name: Tiegel, A. C.
name: Fauseweh, B.
name: Islam, A. T. M. N.
name: Park, J. T.
name: Klemke, B.
name: Honecker, A.
name: Uhrig, G. S.
name: Manmana, S. R.
name: Lake, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Unlike most quantum systems which rapidly become incoherent as temperature is raised, strong correlations persist at elevated temperatures in $S=1/2$ dimer magnets, as revealed by the unusual asymmetric lineshape of their excitations at finite temperatures. Here we quantitatively explore and parameterize the strongly correlated magnetic excitations at finite temperatures using the high resolution inelastic neutron scattering on the model compound BaCu$_2$V$_2$O$_8$ which we show to be an alternating antiferromagnetic-ferromagnetic spin$-1/2$ chain. Comparison to state of the art computational techniques shows excellent agreement over a wide temperature range. Our findings hence demonstrate the possibility to quantitatively predict coherent behavior at elevated temperatures in quantum magnets.
description: 5 pages + 6 pages supplement; problems with list of references are fixed
title: Ο ρόλος των Κοινωνικών Εταίρων στη Διά Βίου Εκπαίδευση και Κατάρτιση των Εργαζομένων
title: The Role of Social Partners in the Lifelong Education and Training of Employees
titleType: AlternativeTitle
Creators: name: Κυρίτσης, Δημήτρης
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2023
Subjects: subject: Συνεχιζόμενη εκπαίδευση -- Ελλάδα
subject: Εκπαίδευση ενηλίκων -- Ελλάδα
subject: Επαγγελματική εκπαίδευση -- Ελλάδα
subject: Επαγγελματική κατάρτιση -- Ελλάδα
subject: Επαγγελματική επιμόρφωση -- Ελλάδα
subject: Αγορά εργασίας -- Ελλάδα
subject: Επαγγελματικά προσόντα -- Πιστοποίηση -- Ελλάδα
subject: Κοινωνικοί εταίροι
subject: Δια βιου εκπαίδευση
subject: Κατάρτιση
subject: Συνεργασία
subject: Τεχνολογία
subject: Ανάγκες εκπαίδευσης
subject: Εργαζόμενοι
subject: Προσαρμογή
subject: Ανάπτυξη δεξιοτήτων
subject: Social partners
subject: Lifelong learning
subject: Training
subject: Collaboration
subject: Technology
subject: Education needs
subject: Workers
subject: Adaptation
subject: Skill development

description: Αριθμός Εισαγωγής: 013715 cd
description: Η συγκεκριμένη μελέτη βασίστηκε σε μια ποιοτική έρευνα που περιλάμβανε συνεντεύξεις με 5 άτομα που εκπροσωπούν τους κοινωνικούς εταίρους και 5 άτομα που ήταν επιμορφούμενοι. Από αυτήν την έρευνα προέκυψαν τα εξής γενικά συμπεράσματα: Και οι εκπρόσωποι των κοινωνικών εταίρων και οι επιμορφούμενοι αναγνωρίζουν τη σημασία της διά βίου εκπαίδευσης και κατάρτισης για την ανάπτυξη των εργαζομένων και την προσαρμογή στις αλλαγές του εργασιακού περιβάλλοντος. Οι επιμορφούμενοι εκφράζουν την ανάγκη για βελτίωση των εκπαιδευτικών προγραμμάτων, ώστε να ανταποκρίνονται στις σύγχρονες απαιτήσεις της αγοράς εργασίας και να παρέχουν τις απαραίτητες δεξιότητες και γνώσεις στους εργαζόμενους. Οι εκπρόσωποι των κοινωνικών εταίρων αναφέρουν την ανάγκη για ενίσχυση της συνεργασίας μεταξύ τους, προκειμένου να προωθηθεί η διά βίου εκπαίδευση και κατάρτιση και να αναπτυχθούν αποτελεσματικές πρωτοβουλίες. Οι συνεντεύξεις αποδεικνύουν ότι η ταχεία εξέλιξη της τεχνολογίας και οι κοινωνικοί μετασχηματισμοί απαιτούν συνεχή προσαρμογή και εκπαίδευση των εργαζομένων, καθώς και ανταλλαγή πληροφοριών και βέλτιστων πρακτικών μεταξύ των κοινωνικών εταίρων. Αυτά τα συμπεράσματα προέκυψαν από τις συνεντεύξεις και παρέχουν μια καλή βάση για την κατανόηση του ρόλου των κοινωνικών εταίρων στη διά βίου εκπαίδευση και κατάρτιση των εργαζομένων. Ωστόσο, πρέπει να ληφθεί υπόψη ότι αυτά τα συμπεράσματα βασίζονται στις απόψεις και τις εμπειρίες των συνεντευξιαζόμενων και ενδέχεται να μην αντιπροσωπεύουν τις απόψεις όλων των ενδιαφερόμενων μερών. Η ανάλυση των δεδομένων βασίστηκε στην ποιοτική προσέγγιση, καθώς οι ηχογραφήσεις και οι σημειώσεις από τις συνεντεύξεις αναλύθηκαν συστηματικά και θεματικά για την εύρεση κοινών μοτίβων, τάσεων και θεμάτων που προέκυπταν από τις απαντήσεις των συμμετεχόντων. Οι κατηγορίες και οι θεματικές ενότητες προέκυψαν από την επανειλημμένη ανάγνωση και ακρίβεια των δεδομένων.
Locality of correlation in density functional theory
Creators: name: Burke, Kieron
name: Cancio, Antonio
name: Gould, Tim
name: Pittalis, Stefano
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Hohenberg-Kohn density functional was long ago shown to reduce to the Thomas-Fermi approximation in the non-relativistic semiclassical (or large-$Z$) limit for all matter, i.e, the kinetic energy becomes local. Exchange also becomes local in this limit. Numerical data on the correlation energy of atoms supports the conjecture that this is also true for correlation, but much less relevant to atoms. We illustrate how expansions around large particle number are equivalent to local density approximations and their strong relevance to density functional approximations. Analyzing highly accurate atomic correlation energies, we show that the correlation energy tends to $-A_c Z ln Z + B_c Z$ as $Z$ tends to infinity, where $Z$ is the atomic number, $A_c$ is known, and we estimate $B_c$ to be about 37 millihartrees. The local density approximation yields $A_c$ exactly, but a very incorrect value for $B_c$, showing that the local approximation is less relevant for correlation alone. This limit is a benchmark for the non-empirical construction of density functional approximations. We conjecture that, beyond atoms, the leading correction to the local density approximation in the large-$Z$ limit generally takes this form, but with $B_c$ a functional of the TF density for the system. The implications for construction of approximate density functionals are discussed.
description: 17 pages, 10 figures
Fractional Fick's law for the boundary driven exclusion process with long jumps
Creators: name: Bernardin, Cédric
name: Jimenez, Byron Oviedo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: A fractional Fick's law and fractional hydrostatics for the one dimensional exclusion process with long jumps in contact with infinite reservoirs at different densities on the left and on the right are derived.
The Linearized Inverse Problem in Multifrequency Electrical Impedance Tomography
Creators: name: Alberti, Giovanni S.
name: Ammari, Habib
name: Jin, Bangti
name: Seo, Jin-Keun
name: Zhang, Wenlong
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper provides an analysis of the linearized inverse problem in multifrequency electrical impedance tomography. We consider an isotropic conductivity distribution with a finite number of unknown inclusions with different frequency dependence, as is often seen in biological tissues. We discuss reconstruction methods for both fully known and partially known spectral profiles, and demonstrate in the latter case the successful employment of difference imaging. We also study the reconstruction with an imperfectly known boundary, and show that the multifrequency approach can eliminate modeling errors and recover almost all inclusions. In addition, we develop an efficient group sparse recovery algorithm for the robust solution of related linear inverse problems. Several numerical simulations are presented to illustrate and validate the approach.
description: 25 pp, 11 figures
The Completeness Problem for Modal Logic
Creators: name: Achilleos, Antonis
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We introduce the completeness problem for Modal Logic and examine its complexity. For a definition of completeness for formulas, given a formula of a modal logic, the completeness problem asks whether the formula is complete for that logic. We discover that completeness and validity have the same complexity --- with certain exceptions for which there are, in general, no complete formulas. To prove upper bounds, we present a non-deterministic polynomial-time procedure with an oracle from PSPACE that combines tableaux and a test for bisimulation, and determines whether a formula is complete.
Minimal conformal extensions of the Higgs sector
Creators: name: Helmboldt, Alexander J.
name: Humbert, Pascal
name: Lindner, Manfred
name: Smirnov, Juri
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we find the minimal extension of the Standard Model's Higgs sector which can lead to a light Higgs boson via radiative symmetry breaking and is consistent with the phenomenological requirements for a low-energy realization of a conformal theory. The model which turns out to be stable under renormalization group translations is an extension of the Standard Model by two scalar fields, one of which acquires a finite vacuum expectation value and therefore mixes into the physical Higgs. We find that the minimal model predicts a sizable amount of mixing which makes it testable at a collider. In addition to the physical Higgs, the theory's scalar spectrum contains one light and one heavy boson. The heavy scalar's properties render it a potential dark matter candidate.
description: 18 pages, 9 figures. Added section on "Embedding into semiclassical gravity", main results remain unchanged, version published in JHEP
On duality of algebraic quantum groupoids
Creators: name: Timmermann, Thomas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16T05

description: Like quantum groups, quantum groupoids frequently appear in pairs of mutually dual objects. We develop a general Pontrjagin duality theory for quantum groupoids in the algebraic setting that extends Van Daele's duality theory for multiplier Hopf algebras and overcomes the finiteness restrictions of the approach of Kadison, Szlachányi, Böhm and Schauenburg. Our construction is based on the integration theory for multiplier Hopf algebroids and yields, as a corollary, a duality theory for weak multiplier Hopf algebras with integrals. We compute the duals in several examples and introduce morphisms of multiplier Hopf algebroids to succinctly describe their structure. Moreover, we show that such morphisms preserve the antipode.
description: 45 pages
New axiomatizable classes of Banach spaces via disjointness-preserving isometries
Creators: name: Raynaud, Yves
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46B42, 46E30 (Primary), 03C65, 46M07 (Secondary)

description: Let C be an axiomatizable class of order continuous real or complex Banach lattices, that is, this class is closed under isometric vector lattice isomorphisms and ultraproducts, and the complementary class is closed under ultrapowers. We show that if linear isometric embeddings of members of C in their ultrapowers preserve disjointness, the class C^B of Banach spaces obtained by forgetting the Banach lattice structure is still axiomatizable. Moreover if C coincides with its "script class" SC, so does C^B with SC^B. This allows us to give new examples of axiomatizable classes of Banach spaces, namely certain Musielak-Orlicz spaces, Nakano spaces, and mixed norm spaces.
description: v2: 30 pages; title changed, preliminaries added, first section divided in two sections, references added, one proposition added in section 3 v3: 31 pages: minor changes (typos, language, comments, references)
LEg-GOdt: Play Well Co-constructed Meaning-making in an Elementary Classroom
Creators: name: Disotuar, Demetra
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Making meaning is a social and semiotic endeavor. The positive roles of talk and play have long been argued as critical factors in the comprehension process. Yet, in classrooms today, there are limited opportunities for students to enact these social behaviors, collaborate, and negotiate understanding of a text or concept in spaces independent of the teacher. Comprehension is named and evaluated as an outcome versus honoring the agentive processes that lead learners to that outcome (Aukerman, 2013). There is still much to be learned by scholars and practitioners about the acts of making meaning—the agentive work done in the spirit of comprehending. This single case study sought to better understand what can be learned about the comprehension process by observing five fourth grade students (organized in two groups) co-construct meaning of a story using LEGO pieces. The data revealed that when students are provided with the gifts of time, talk, manipulatives (i.e., LEGO pieces), and play, they can co-construct deep and symbolic understandings of a text. The findings contributed to a conceptual model for co-constructed meaning-making, which reflects how students explore inferential understandings and empathy and concretize their understanding through the meaning potential of the LEGO pieces. In the process, the students create a shared LEGO language, which in turn, allows them to reconstruct representations that reflect deep and personalized understandings of the text. The findings of this study challenge educators--intermediate grade teachers, in particular--to think broadly about how they design opportunities for students to co-construct meaning of texts through talk and play. Additionally, this conceptual model extends to theory in that it reveals how students move toward understanding; it is a latent and layered process.
Little Strings, Quasi-topological Sigma Model on Loop Group, and Toroidal Lie Algebras
Creators: name: Ashwinkumar, Meer
name: Cao, Jingnan
name: Luo, Yuan
name: Tan, Meng-Chwan
name: Zhao, Qin
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the ground states and left-excited states of the A_{k-1} N=(2,0) little string theory. Via a theorem by Atiyah [1], these sectors can be captured by a supersymmetric nonlinear sigma model on CP^1 with target space the based loop group of SU(k). The ground states, described by L^2-cohomology classes, form modules over an affine Lie algebra, while the left-excited states, described by chiral differential operators, form modules over a toroidal Lie algebra. We also apply our results to analyze the 1/2 and 1/4 BPS sectors of the M5-brane worldvolume theory.
description: 32 pages. Minor imprecisions and typos corrected. To appear in Nuclear Physics B
A bicategory of decorated cospans
Creators: name: Courser, Kenny
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: If $\mathbf{C}$ is a category with pullbacks then there is a bicategory with the same objects as $\mathbf{C}$, spans as morphisms, and maps of spans as 2-morphisms, as shown by Benabou. Fong has developed a theory of "decorated" cospans, which are cospans in $\mathbf{C}$ equipped with extra structure. This extra structure arises from a lax symmetric monoidal functor $F \colon \mathbf{C} \to \mathbf{D}$; we use this functor to "decorate" each cospan with apex $N \in \mathbf{C}$ with an element of $F(N)$. Using a result of Shulman, we show that when $\mathbf{C}$ has finite colimits, decorated cospans are morphisms in a symmetric monoidal bicategory. We illustrate our construction with examples from electrical engineering and the theory of chemical reaction networks.
description: 29 pages
Baryogenesis in false vacuum
Creators: name: Hamada, Yuta
name: Yamada, Masatoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The null result in the LHC may indicate that the standard model is not drastically modified up to very high scales such as the GUT/string scale. Having this in the mind, we suggest a novel leptogenesis scenario realized in the false vacuum of the Higgs field. If the Higgs field develops a large vacuum expectation value in the early universe, a lepton number violating process is enhanced, which we use for baryogenesis. To demonstrate the scenario, several models are discussed. For example, we show that the observed baryon asymmetry is successfully generated in the standard model with higher-dimensional operators.
description: 25 pages, 7 figures, published version(v4)
Speeding Up Distributed Machine Learning Using Codes
Creators: name: Lee, Kangwook
name: Lam, Maximilian
name: Pedarsani, Ramtin
name: Papailiopoulos, Dimitris
name: Ramchandran, Kannan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Codes are widely used in many engineering applications to offer robustness against noise. In large-scale systems there are several types of noise that can affect the performance of distributed machine learning algorithms -- straggler nodes, system failures, or communication bottlenecks -- but there has been little interaction cutting across codes, machine learning, and distributed systems. In this work, we provide theoretical insights on how coded solutions can achieve significant gains compared to uncoded ones. We focus on two of the most basic building blocks of distributed learning algorithms: matrix multiplication and data shuffling. For matrix multiplication, we use codes to alleviate the effect of stragglers, and show that if the number of homogeneous workers is $n$, and the runtime of each subtask has an exponential tail, coded computation can speed up distributed matrix multiplication by a factor of $\log n$. For data shuffling, we use codes to reduce communication bottlenecks, exploiting the excess in storage. We show that when a constant fraction $α$ of the data matrix can be cached at each worker, and $n$ is the number of workers, \emph{coded shuffling} reduces the communication cost by a factor of $(α+ \frac{1}{n})γ(n)$ compared to uncoded shuffling, where $γ(n)$ is the ratio of the cost of unicasting $n$ messages to $n$ users to multicasting a common message (of the same size) to $n$ users. For instance, $γ(n) \simeq n$ if multicasting a message to $n$ users is as cheap as unicasting a message to one user. We also provide experiment results, corroborating our theoretical gains of the coded algorithms.
description: This work is published in IEEE Transactions on Information Theory and presented in part at the NIPS 2015 Workshop on Machine Learning Systems and the IEEE ISIT 2016
АЛТАЙСКИЕ МАРШРУТЫ АКАДЕМИКА ПЕТРА СИМОНА ПАЛЛАСА: К 250-ЛЕТИЮ ЭКСПЕДИЦИИ ПО АЛТАЮ (1771)
Creators: name: Л.В. Пестова
Publisher: name: Известия Алтайского отделения Русского географического общества
Year: 2022
Subjects: Петр Симон Паллас
Алтайский край
Барнаул
Колывано-Воскресенские рудники и заводы.

description: Петр Симон Паллас – известнейший русский ученый иностранного происхождения, большую часть своей жизни проживший в России и служивший на благо ее. Как отмечено в статье Русского биографического словаря (1902), это «один из наиболее выдающихся естествоиспытателей всех стран и народов… Он составлял красу … Академии наук… с гордостью можем причислить его к русским ученым». В 1771 г. маршрут П.С. Палласа пролегал через Рудный Алтай, в т.ч. и в границах современного Алтайского края. Он не только подробно описал слагаемые породы и устройство руд-ников региона, но и дал экономическую оценку их деятельности. Привел списки растений и животных, а также их видовое описание. В многотомном труде П.С. Палласа можно найти картины быта и устройства алтайских поселений, включая Барнаул – город, который он покидал с сожалением. Статья посвящена путешествию П.С. Палласа по Алтаю.
Huber_Cabra_García_2023_The_pholcid_spiders_of_Colombia_ver01.pdf
Creators: name: Huber, Bernhard A.
name: Cabra García, Jimmy
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 310913
subject: Invertebrate biology

description: This report summarizes the results of an expedition to Colombia in September 2022. The specific aim was an overview of pholcid spider diversity and distribution in two distinct regions in Colombia: the Andean and Caribbean biogeographic regions. We visited 46 localities and collected 1353 adult specimens that are tentatively assigned to ~90 morphospecies (only 22 species are currently known from Colombia). This is now the world’s largest collection of Colombian Pholcidae. Our preliminary data suggest that the number of new species is approximately 77 (i.e., ~85% of the collected species are new). Of these 77 new species, 65 are represented by males and females. Our data suggest a high species turnover among localities and highly distinct faunal compositions in terms of genera among different biogeographic regions in Colombia. Excluding synanthropic species, only two of the 90 species were found in both biogeographic regions. We also give a brief summary of other major collections worldwide holding Colombian pholcid spiders, and outline some of the potential next steps in terms of publications and further collecting.
On the hidden charm pentaquark-s in $Λ_b \to J/ψK^- p$ decay
Creators: name: Roca, L.
name: Oset, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a previous work we presented a theoretical analysis of the $Λ_b \to J/ψK^- p$ reaction from where a recent experiment by the LHCb collaboration at CERN claimed the existence of two hidden charm pentaquarks, $P_c(4380)^+$ and $P_c(4450)^+$. In that work we focused only on the $Λ(1405)$ and $P_c(4450)^+$ signals and discussed the possible explanation of this pentaquark state within the picture of a dynamical meson-baryon molecule made up mostly from $\bar D^* Σ_c$ and $\bar D^* Σ^*_c$ components. In the present work we improve upon the previous one by considering the total $K^- p$ and $J/ψp$ data including all the relevant resonances contributing to the spectra, and discuss the possible nature of both $P_c(4380)^+$ and $P_c(4450)^+$. We also discuss several important topics, like the effect of the contact term in the reaction, the viability of reproducing the data without the $P_c(4380)^+$ and the possible quantum numbers assignment to these pentaquarks.
description: 12 pages, 10 figures
MIND-USA In-Hospital Outcomes
Creators: name: Thompson, Jennifer
name: Raman, Rameela
name: Girard, Timothy
name: Ely, E.
Publisher: name: Open Science Framework
Year: 2022

description: In-hospital outcomes for clinical trial aiming to define the role of antipsychotics in the management of delirium in critically ill patients. clinicaltrials.gov: NCT01211522
Safe Learning of Regions of Attraction for Uncertain, Nonlinear Systems with Gaussian Processes
Creators: name: Berkenkamp, Felix
name: Moriconi, Riccardo
name: Schoellig, Angela P.
name: Krause, Andreas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Control theory can provide useful insights into the properties of controlled, dynamic systems. One important property of nonlinear systems is the region of attraction (ROA), a safe subset of the state space in which a given controller renders an equilibrium point asymptotically stable. The ROA is typically estimated based on a model of the system. However, since models are only an approximation of the real world, the resulting estimated safe region can contain states outside the ROA of the real system. This is not acceptable in safety-critical applications. In this paper, we consider an approach that learns the ROA from experiments on a real system, without ever leaving the true ROA and, thus, without risking safety-critical failures. Based on regularity assumptions on the model errors in terms of a Gaussian process prior, we use an underlying Lyapunov function in order to determine a region in which an equilibrium point is asymptotically stable with high probability. Moreover, we provide an algorithm to actively and safely explore the state space in order to expand the ROA estimate. We demonstrate the effectiveness of this method in simulation.
description: Proc. of the Conference on Decision and Control (CDC) 2016 (extended version), 7 pages, code and experiment documentation available at https://github.com/befelix/lyapunov-learning
Quasars physical properties study based on the medium-band photometric survey
Creators: name: Kotov, Sergey
name: Dodonov, Sergey
name: Grokhovskaya, Aleksandra
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The study is about the quasars cosmological evolution. We used the medium-band photometric survey at the 1-m Schmidt telescope of the Byurakan Astrophysical Observatory. The HS47-22 field with an area of 2.38 square degrees has been selected. We have classified objects and composed a sample of quasars using broadband photometric data and morphological classification from the DECaLS survey, infrared photometry from the WISE survey, spectroscopy from the SDSS survey, ROSAT X-ray data, FIRST radio data and stellar parallax data from the GAIA survey. We have compiled a sample of 682 quasars, determined their photometric redshifts from the medium-band photometric data, and calculated the absolute stellar magnitudes. The space density of quasars was calculated for different luminosity ranges at different redshifts using the $λ$-CDM model with $Ω_m = 0.3$ and $Ω_λ= 0.7$. In this paper, we present the comparison of our results with other works.
description: 8 pages, 8 figures
The formation and physical origin of highly ionized cooling gas
Creators: name: Bordoloi, Rongmon
name: Wagner, Alexander Y.
name: Heckman, Timothy M.
name: Norman, Colin A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a simple model that explains the origin of warm diffuse gas seen primarily as highly ionized absorption line systems in the spectra of background sources. We predict the observed column densities of several highly ionized transitions such as OVI, OVIII, NeVIII, NV, and MgX; and present a unified comparison of the model predictions with absorption lines seen in the Milky Way disk, Milky Way halo,starburst galaxies, the circumgalactic medium and the intergalactic medium at low and high redshifts. We show that diffuse gas seen in such diverse environments can be simultaneously explained by a simple model of radiatively cooling gas. We show that most of such absorption line systems are consistent with being collisionally ionized, and estimate the maximum likelihood temperature of the gas in each observation. This model satisfactorily explains why OVI is regularly observed around star-forming low-z L* galaxies, and why NV is rarely seen around the same galaxies. We further present some consequences of this model in quantifying the dynamics of the cooling gas around galaxies and predict the shock velocities associated with such flows. A unique strength of this model is that while it has only one free (but physically well-constrained) parameter, it nevertheless successfully reproduces the available data on O VI absorbers in the interstellar, circumgalactic, intra-group, and intergalactic media, as well as the available data on other absorption-line from highly ionized species.
description: 15 pages, 10 figures, Accepted in ApJ, Substantial Revision, Simulation section added, new NeVIII vs OVI comparison added
On thresholdless lasing features in high-$β$ nitride nanobeam cavities: a quantum optical study
Creators: name: Jagsch, Stefan T.
name: Triviño, Noelia Vico
name: Lohof, Frederik
name: Callsen, Gordon
name: Kalinowski, Stefan
name: Rousseau, Ian M.
name: Barzel, Roy
name: Carlin, Jean-François
name: Jahnke, Frank
name: Butté, Raphaël
name: Gies, Christopher
name: Hoffmann, Axel
name: Grandjean, Nicolas
name: Reitzenstein, Stephan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Exploring the limits of spontaneous emission coupling is not only one of the central goals in the development of nanolasers, it is also highly relevant regarding future large-scale photonic integration requiring energy-efficient coherent light sources with a small footprint. These studies are accompanied by a vivid debate on how to prove and interpret lasing in the high-$β$ regime. We investigate close-to-ideal spontaneous emission coupling in GaN nanobeam lasers grown on silicon. Due to their high optical quality, such nanobeam cavities allow for efficient funneling of spontaneous emission from the quantum well gain material into the laser mode. By performing a comprehensive optical and quantum-optical characterization, supported by microscopic modeling of the nanolasers, we identify high-$β$ lasing at room temperature and show a lasing transition in the absence of a threshold nonlinearity at 156 K. This peculiar characteristic is explained in terms of a temperature and excitation power dependent interplay between 0D and 2D gain contributions.
A new look at the decomposition of unipotents and the normal structure of Chevalley groups
Creators: name: Stepanov, Alexei
Publisher: name: arXiv
Year: 2015
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20G35

description: The current article continues a series of papers on decomposition of unipotents and its applications. Let $G(Φ,R)$ be a Chevalley group with a reduced irreducible root system $Φ$ over a commutative ring $R$. Fix $h\in G(Φ,R)$. Call an element $a\in G(Φ,R)$ "good", if it lies in the unipotent radical of a parabolic subgroup whereas the conjugate to $a$ by $h$ belongs to another proper parabolic subgroup (here we assume that all parabolics contain a given split maximal torus). Decomposition of unipotents is a representation of a root unipotent element as a product of "good" elements. Existence of such a decomposition implies a simple proof of the normality of the elementary subgroup and description of the normal structure of $G(Φ,R)$. However, the decomposition is available not for all root systems. In the current article we show that for the proof of the standard normal structure it suffices to construct only one "good" element for the generic element of the scheme $G(Φ,_-)$, and construct such a "good" element. The question whether "good" elements generate the whole elementary group will be addressed in a separate paper (the first version of the article was in Russian).
Half-Skyrmion Spin Textures In Polariton Microcavities
Creators: name: Cilibrizzi, Pasquale
name: Sigurdsson, Helgi
name: Liew, Tim C. H.
name: Ohadi, Hamid
name: Askitopoulos, Alexis
name: Brodbeck, Sebastian
name: Schneider, Christian
name: Shelykh, Ivan A.
name: Höfling, Sven
name: Ruostekoski, Janne
name: Lagoudakis, Pavlos
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the polarization dynamics of a spatially expanding polariton condensate under nonresonant linearly polarized optical excitation. The spatially and temporally resolved polariton emission reveals the formation of non-trivial spin textures in the form of a quadruplet polarization pattern both in the linear and circular Stokes parameters, and an octuplet in the diagonal Stokes parameter. The continuous rotation of the polariton pseudospin vector through the condensate due to TE-TM splitting exhibits an ordered pattern of half-skyrmions associated with a half-integer topological number. A theoretical model based on a driven-dissipative Gross-Pitaevskii equation coupled with an exciton reservoir describes the dynamics of the nontrivial spin textures through the optical spin-Hall effect.
description: 13 pages, 9 figures
Serine/threonine kinase of Mpox virus: computational modeling and structural analysis
Creators: name: Abduljalil, Jameel
name: Al-Madhagi, Haitham
name: Elfiky, Abdo
name: AlKhazindar, Maha
Publisher: name: Zenodo
Year: 2022
Subjects: Atypical kinase
Orthopoxvirus
Monkeypox virus

description: These are the supplementary data for the article "Serine/threonine kinase of Mpox virus: computational modeling and structural analysis".
On the Determination of the Solar Rotation Elements i, Ω and Period using Sunspot Observations by Ruđer Bošković in 1777
Creators: name: Husak, Mirko
name: Brajša, Roman
name: Špoljarić, Dragan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In September 1777, Ruđer Bošković observed sunspots for six days. Based on these measurements, he used his own methods to calculate the elements of the solar rotation, the longitude of the node, the inclination of the solar equator and the period. He published a description of the methods, the method of observation and detailed instructions for calculations in the second chapter of the fifth part of the Opera in 1785. In this paper, Bošković original calculations and repeated calculations by his procedure are published. By analysing the input quantities, procedures, and results, the input quantities of the error, and the calculation results are discussed. The reproduction of Bošković calculations is successfully reproduced and we obtained very similar results. The conclusion proposes a relationship of Bošković research with modern astronomy.
description: 22 pages, 2 figures, 41 tables, published in The Mining-Geology-Petroleum Engineering Bulletin (https://www.scopus.com/sourceid/101730, https://hrcak.srce.hr/rgn-zbornik)
Non-Markovian quantum processes: complete framework and efficient characterisation
Creators: name: Pollock, Felix A.
name: Rodríguez-Rosario, César
name: Frauenheim, Thomas
name: Paternostro, Mauro
name: Modi, Kavan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Currently, there is no systematic way to describe a quantum process with memory solely in terms of experimentally accessible quantities. However, recent technological advances mean we have control over systems at scales where memory effects are non-negligible. The lack of such an operational description has hindered advances in understanding physical, chemical and biological processes, where often unjustified theoretical assumptions are made to render a dynamical description tractable. This has led to theories plagued with unphysical results and no consensus on what a quantum Markov (memoryless) process is. Here, we develop a universal framework to characterise arbitrary non-Markovian quantum processes. We show how a multi-time non-Markovian process can be reconstructed experimentally, and that it has a natural representation as a many body quantum state, where temporal correlations are mapped to spatial ones. Moreover, this state is expected to have an efficient matrix product operator form in many cases. Our framework constitutes a systematic tool for the effective description of memory-bearing open-system evolutions.
description: 10+4 pages, 6 figures; split into new version and arXiv:1801.09811
Differential Gene Expression of Ca2+ Channel-Mediated Signaling Pathways in DPSCs under Hypoxic Condition
Creators: name: Tran, John T
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Dental pulp stem cell (DPSC) survival, differentiation into odontoblast and deposition of matrix for mineralization is essential for vital pulp therapy (VPT) and regenerative endodontic therapy (RET). Calcium homeostasis in DPSC plays a critical role for its survival, longevity, and differentiation processes. Cells use this external source of signal calcium ions by activating various entry channels with different properties. The objective of this research is to investigate key gene candidates involved with calcium homeostasis in human dental pulp tissue and DPSCs. DPSCs isolated from human dental pulp were cultured in hypoxic chamber (3%) for 21 days at 37°C in differentiation media and controls were cultured under normal conditions. Later, DPSCs collected were extracted for mRNA isolation. The mRNA was sequenced using NextSeq Illunima and was analyzed using the ERGOTM transcription tool using statistical methods such as Limma (Linear Model) and DESeq2 (Negative Binomial). There were a total of 24 biomarkers identified with a 6-fold higher over expressed in hypoxic conditions compared to normoxia. These include key genes such as CALM2, MYLK, FGR1, ASPH, PDGFRA, ATP2B4, ATP2B1, PDGFRB, CALM1, and PPP3CA. The genes and pathways were identified in KEGG pathways overlaying expression values. The release of calcium ions from internal stores and the influx of calcium ions from the environment cause a dramatic and rapid increase in cytoplasmic calcium concentration, which has been exploited for signal transduction. In combination with power statistical analysis such as DESeq2 and Limma, key pathways can be identified that are responsible for calcium homeostasis and calcium channel signaling as key diagnostic markers for VPT and RET.
National Open Access Monitor Project: Cost To Sector Survey
Creators: name: Ferris, Catherine
Publisher: name: Zenodo
Year: 2023
Subjects: open access monitoring
open access
Ireland
survey

description: This is a reference PDF copy of the Cost To Sector stakeholder survey for the National Open Access Monitor project, with submissions captured through the Online Survey platform. The context is detailed in the National Open Access Monitor Project Plan: https://doi.org/10.5281/zenodo.7331431 and in the Stakeholder Information and Consent Form: https://doi.org/10.5281/zenodo.7589770 This project is managed by IReL and has received funding from Ireland’s National Open Research Forum under the NORF Open Research Fund. https://norf.ie/funding/ https://norf.ie/orf-projects-announcement/
Magnetotransport in single layer graphene in a large parallel magnetic field
Creators: name: Chiappini, F.
name: Wiedmann, S.
name: Titov, M.
name: Geim, A. K.
name: Gorbachev, R. V.
name: Khestanova, E.
name: Mishchenko, A.
name: Novoselov, K. S.
name: Maan, J. C.
name: Zeitler, U.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene on hexagonal boron-nitride (h-BN) is an atomically flat conducting system that is ideally suited for probing the effect of Zeeman splitting on electron transport. We demonstrate by magneto-transport measurements that a parallel magnetic field up to 30 Tesla does not affect the transport properties of graphene on h-BN even at charge neutrality where such an effect is expected to be maximal. The only magnetoresistance detected at low carrier concentrations is shown to be associated with a small perpendicular component of the field which cannot be fully eliminated in the experiment. Despite the high mobility of charge carries at low temperatures, we argue that the effects of Zeeman splitting are fully masked by electrostatic potential fluctuations at charge neutrality.
description: v2: updated with some modifications/clarifications
Actifield, an automated open-source actimeter for rodents
Creators: name: Kumbol, Victor
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: activity meter
subject: Arduino
subject: locomotion
subject: low cost
subject: mice
subject: open field test

description: ActiField is an Arduino-driven activity meter box which can be used to measure locomotor activity of rodents for neurobehavioural experiments. This project was started during the 1st TReND Advanced Open Labware Workshop in Cape Town, South Africa in April 2018.
An $S_4$ model inspired from self-complementary neutrino mixing
Creators: name: Zhang, Xinyi
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We build an $S_4$ model for neutrino masses and mixings based on the self-complementary (SC) neutrino mixing pattern. The SC mixing is constructed from the self-complementarity relation plus $δ_{\rm CP}=-\fracπ{2}$. We elaborately construct the model at a percent level of accuracy to reproduce the structure given by the SC mixing. After performing a numerical study on the model's parameter space, we find that in the case of normal ordering, the model can give predictions on the observables that are compatible with their $3σ$ ranges, and give predictions for the not-yet observed quantities like the lightest neutrino mass $m_1\in [0.003,0.010]$ eV and the Dirac CP violating phase $δ_{\rm CP}\in[256.72^\circ,283.33^\circ]$.
description: updated analysis using the latest global analysis; references added; matches version accepted for publication in J. Phys. G: Nucl. Part. Phys
Broadcasting Quantum Coherence via Cloning
Creators: name: Chakrabarty, Indranil
name: Sharma, Udit Kamal
name: Shukla, Manish Kumar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum coherence (QCh) is considered to be a key ingredient in quantum resource theories and also plays a pivotal role in the design and implementation of various information processing tasks. Consequently, it becomes important for us to create more number coherent quantum states between two labs from a given coherent state shared initially. We call this process as \textbf{Broadcasting of Quantum Coherence (QCh)}. In this work we extensively study the problem of broadcasting of QCh. In order to have a holistic view of broadcasting, we start with a most general representation two qubit mixed state in terms of Bloch vectors. As a cloning transformation we have used universal symmetric optimal Buzek-Hillery (BH) cloner locally as well as non locally. Remarkably, we find that in either of the case it is impossible to do optimal broadcasting of QCh. Further we show in case of non optimal broadcasting it is impossible to increase QCh of the state by both local and non local cloning operations. In non optimal case, apart from general result we consider examples like, a) Werner like states (WLS) and b) Bell diagonal states (BDS) and obtain ranges for broadcasting in terms of input state parameters.
description: 6 Figures, 2 Tables, 11 Pages, Accepted in Physical Review A
The geometry of homothetic covering and illumination
Creators: name: Bezdek, Karoly
name: Khan, Muhammad A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: At a first glance, the problem of illuminating the boundary of a convex body by external light sources and the problem of covering a convex body by its smaller positive homothetic copies appear to be quite different. They are in fact two sides of the same coin and give rise to one of the important longstanding open problems in discrete geometry, namely, the Illumination Conjecture. In this paper, we survey the activity in the areas of discrete geometry, computational geometry and geometric analysis motivated by this conjecture. Special care is taken to include the recent advances that are not covered by the existing surveys. We also include some of our recent results related to these problems and describe two new approaches -- one conventional and the other computer-assisted -- to make progress on the illumination problem. Some open problems and conjectures are also presented.
description: 22 pages, 7 figures