cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Disq, a library for manipulating bioinformatics sequencing formats in Apache Spark
Creators: name: Bergelson, Louis
name: Heuer, Michael L
name: Norman, Chris
name: White, Tom
name: Williams, Ryan
Publisher: name: F1000 Research Limited
Year: 2019

description: ADAM and GATK have independently developed parallel and distributed genomic applications on Apache Spark.

To access flat file formats such as BAM, CRAM, SAM, and VCF, both depend on the htsjdk library, which provides low­level codecs, and the Hadoop-­BAM library, which extends these for parallel and distributed access.

Hadoop-­BAM was found to have correctness (invalid BAM file splits, leading to corrupt read data) and performance (sequential implementation of some parallelizable tasks) issues. The Spark­-BAM project demonstrated these issues could be addressed, and developed a comprehensive benchmark.

Thus members of the ADAM, Hadoop-­BAM, htsjdk, GATK, Spark­-BAM, and ViraPipe projects identified an opportunity to collaborate on a replacement library. Discussion between collaborators began virtually, then in­person at OpenBio Winter Codefest 2018 in Boston, and continued at GCCBOSC Collaboration Fest 2018 in Portland. A new project Disq was started in 2018, and has since made at least three releases (most recently version 0.3.0, released 19 March 2019).

Benchmarks show that Disq is faster and more accurate than Hadoop­-BAM, and at least as fast as Spark­BAM.

Disq also adds significant new features, such as support for writing sharded files for efficiency, for taking advantage of index files while reading (e.g. .sbi index files to find splits between BAM records, .crai index files to find record boundaries in CRAM files), and for writing index files where appropriate.

In addition to unit tests, Disq includes integration tests that run against real­world files (multi­GB in size). SAMtools and BCFtools are used to verify files written with Disq can be read successfully.

Disq has been incorporated into ADAM and GATK, and will provide a convenient venue for further collaboration between those project teams. We also welcome new collaborators seeking correct and performant access to flat file formats on Apache Spark.
Natural Wonders: Implementing Environmental Programming in Libraries
Creators: name: Harrington, Eileen G.
name: Beale, Hayley
Publisher: name: Association for Library Service to Children (ALSC)
Year: 2010
Subjects: Environmental education
Library programs for children
Public Libraries
School Libraries
Museums

description: The Naturalist Center is the public library and resource center of the California Academy of Sciences. Visitors come to find out more about the natural world, either on their own or with thehelp of our staff. This article describes some of the programming offered to help children engage with and increase their appreciation of the natural world, as well as their science literacy. It also describes ways in which these programs could be implemented in public and school libraries. Environmental programming is crucial to giving children the knowledge and tools they need to work for change and to help them put into practice some of what they are learning. In addition, libraries can help fill the gap in science education that has emerged since the implementation of No Child Left Behind. Many of the environmental problems we face are complex and can appear onerous. With many scattered, small actions, however, we can achieve a more sustainable future.
Analysis and evaluation of three symbol timing recovery techniques for digital wireless personal communication systems
Creators: name: Williams, Christopher A.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis investigates the performance in the presence of CCI and multipath fading of three symbol timing recovery schemes, maximum likelihood (ML) non-data aided (NDA) and data-aided (DA) tracking loops, and a ML block symbol synchronizer, for QPSK, π/4—shift DQPSK, and 16—QAM modulation schemes. In the first part of the thesis, analysis of the three symbol synchronizers in a combined AWGN and CCI environment is performed, based on a linear assumption for small jitter, and expressions for RMS symbol timing jitter are presented for each technique, assuming Nyquist pulse shaping. Computer simulations are also performed in order to validate the results and provide bit-error rate (BER) performance of each synchronizer. CCI was found to be the chief limit on symbol timing jitter performance at high signal-to-noise ratios (SNR) for all three synchronizers. Simulations matched theory in most cases, except where the linear assumption is no longer valid. Simulation showed that for carrier-to-interference (C/I) ratios of ≥ 10 dB, CCI effects on symbol timing recovery result in negligible BER degradation over ideal sampling. The second part of the thesis investigates the three symbol synchronizers in a fading environment. Irreducable BER and RMS timing jitter estimates were made by computer simulation using π/4—shift DQPSK modulation in frequency non-selective Rayleigh and Ricean fading, as well as in frequency selective fading. Rayleigh fading had little effect on symbol timing jitter at high SNR unless the fading was extremely fast, that is where the fading bandwidth (B[sub F]) times the information symbol duration (T) product is relatively high (i.e. Β[sub F]Τ>0.1), and had no noticeable effect on irreducable BER for the range simulated. In frequency selective fading with a two-ray model, the synchronizers were observed to track the optimum sampling instant well at high SNR, for delay spreads of the two-ray model used of τ[sub d] < 0.2T. For more severe fading (i.e. τ[sub d]> 0.2T), the ML block synchronizer performed best, tracking the optimum sampling instant with no increase in the irreducable BER until τ[sub d] = T/2. The ML NDA technique was found to be the worst performer for frequency selective multipath fading, with double the irreducable BER in the worst case simulated.
I confini del rischio sociale di povertà attraverso i requisiti soggettivi e oggettivi del reddito di cittadinanza
Creators: name: Comande' Daniela
Publisher: name: Zenodo
Year: 2020
Subjects: Welfare
Reddito di cittadinanza

description: L’operazione sociale varata attraverso il reddito di cittadinanza e la pensione di cittadinanza ha costituito il più ingente trasferimento di risorse pubbliche a favore dei poveri mai effettuato in Italia. Ciononostante, l’esigenza di venire a patti con la realtà del bilancio dello Stato ha portato il governo a ridimensionare le pretese iniziali di contrasto alla povertà: la disciplina relativa ai requisiti di accesso, ritoccata in sede di conversione, rivela il tentativo di restringere quanto più possibile l’ambito soggettivo di applicazione della misura al fine di limitare le risorse economiche realmente investite, come difatti è già emerso dalla legge di stabilità per il 2020. L'autrice illustra criticamente i requisiti che concorrono a forgiare la figura del beneficiario, che sono di tipo soggettivo – cioè quelli che si riferiscono a cittadinanza, residenza e soggiorno – e oggettivo – ovvero legati al reddito e al patrimonio del richiedente.
Fast and Accurate Road Crack Detection Based on Adaptive Cost-Sensitive Loss Function
Creators: name: Li, Kai
name: Wang, Bo
name: Tian, Yingjie
name: Qi, Zhiquan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Numerous detection problems in computer vision, including road crack detection, suffer from exceedingly foreground-background imbalance. Fortunately, modification of loss function appears to solve this puzzle once and for all. In this paper, we propose a pixel-based adaptive weighted cross-entropy loss in conjunction with Jaccard distance to facilitate high-quality pixel-level road crack detection. Our work profoundly demonstrates the influence of loss functions on detection outcomes, and sheds light on the sophisticated consecutive improvements in the realm of crack detection. Specifically, to verify the effectiveness of the proposed loss, we conduct extensive experiments on four public databases, i.e., CrackForest, AigleRN, Crack360, and BJN260. Compared with the vanilla weighted cross-entropy, the proposed loss significantly speeds up the training process while retaining the test accuracy.
description: 14 pages,12 figures, 8 tables
La somministrazione di lavoro nella regolamentazione collettiva delle agenzie: competenze e istituti
Creators: name: Comande' Daniela
Publisher: name: Zenodo
Year: 2019
Subjects: Flessibilità
Somministrazione

description: Il saggio si concentra sulle modifiche restrittive del decreto dignità all’istituto della somministrazione di lavoro e sulle misure di flexsecurity adottate nel nuovo contratto collettivo siglato il 21 dicembre 2018. Le scelte restrittive del legislatore sono state in parte arginate da quelle effettuate dalle parti sociali. Grazie a queste opzioni la somministrazione di lavoro, in tempi di crisi economica, si rivela terreno elettivo di flessibilità tutelata che gode di un potenziamento di diritti e tutele a sostegno del reddito, della continuità occupazionale e di politiche attive speciali.
Ηλεκτροχημικός προσδιορισμός ασκορβικού οξέος με χημικά μορφοποιημένο, με dsDNA, ηλεκτρόδιο πάστας άνθρακα
Creators: name: Σουρουτζίδης, Αναστάσιος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ασκορβικό οξύ – Βιταμίνη C
DNA ηλεκτροχημικός βιοαισθητήρας
Ηλεκτρόδιο πάστας άνθρακα
Ascorbic acid – Vitamin C
DNA electrochemical biosensor
Carbon paste electrode

description: Στην παρούσα μεταπτυχιακή εργασία, πραγματοποιήθηκε ηλεκτροχημικός προσδιορισμός του ασκορβικού οξέος με χρήση DNA βιοαισθητήρα. Για τον ηλεκτροχημικό προσδιορισμό, χρησιμοποιήθηκε η τεχνική της προσροφητικής αναδιαλυτικής βολταμμετρίας, με τεχνική σάρωσης δυναμικού αυτή του διαφορικού παλμού. Ο DNA βιοαισθητήρας δημιουργήθηκε με μορφοποίηση ενός ηλεκτροδίου πάστας άνθρακα, με dsDNA από θύμο αδένα βοοειδούς. Για τον προσδιορισμό, υπήρξε μια βελτιστοποίηση παραμέτρων όπως ο χρόνος προσυγκέντρωσης του ασκορβικού οξέος στο μορφοποιημένο ηλεκτρόδιο, η εφαρμογή, ή μη, δυναμικού κατά την αλληλεπίδραση, καθώς και η εύρεση του ιδανικού pH των διαλυμάτων διαλυτοποίησης και μέτρησης του ασκορβικού οξέος αλλά και η παρουσία, ή μη, αλάτων σε αυτά. Επίσης, πραγματοποιήθηκε βελτιστοποίηση των παραμέτρων του ποτενσιοστάτη όπως η ταχύτητα σάρωσης, το βήμα δυναμικού και το δυναμικό παλμού. Στόχος της εργασίας, ήταν η ανάπτυξη των ιδανικών συνθηκών ανίχνευσης του ασκορβικού οξέος με χρήση DNA βιοαισθητήρα και η δημιουργία πρότυπης καμπύλης αναφοράς της μεθόδου, για πιθανή μελλοντική εφαρμογή σε πραγματικά δείγματα. Τα αποτελέσματα έδειξαν, ότι ο βιοαισθητήρας, έχει υψηλή ευαισθησία και εκλεκτικότητα στην ανίχνευση ασκορβικού οξέος διαφόρων συγκεντρώσεων
description: In this thesis, an electrochemical determination of ascorbic acid was performed using a DNA biosensor. Differential pulse adsorptive stripping voltammetry (DPAdSV) was used for the determination. The DNA biosensor was developed by the modification, with dsDNA from bovine thymus gland, of a carbon paste electrode. An optimization of various parameters, such as the preconcentration time of the ascorbic acid on the modified electrode, the application, or not, of voltage during the interaction, as well as finding the ideal pH value of the ascorbic acid solubilization and measuring buffer and the presence or absence of salts therein, was performed. An optimization of the potentiostat parameters such as scan rate, voltage step and voltage pulse, was also performed. The aim of the present thesis was to develop the ideal conditions for the determination of ascorbic acid using a DNA biosensor and the generation of a standard reference method curve, for a possible future application in real samples. The results shown, that the biosensor has high sensitivity and selectivity towards various ascorbic acid concentrations
An effective time-domain based periodic steady-state solution algorithm
Creators: name: Wang, Qing
Publisher: name: University of British Columbia
Year: 2009

description: Time-domain steady-state analysis of a class of nonlinear networks with periodic inputs is stud ied in this thesis. The problem is formulated as a particular type of the two-point boundary value (TPBV) problem. After treatment of the boundary conditions, the very efficient relax ation method is used to solve the problem. The relaxation matrix presented has a special band form, and a backward-computation plus forward-substitution algorithm is proposed to compute the correction of history sources. Since the direct inversion of the relaxation matrix is avoided, the algorithm requires minimal computational effort. The performance of the proposed method for steady-state analysis is demonstrated and compared with other methods for four examples: a linear RLC network, a nonlinear RLC network, one dc power supply circuit, and one rectifer circuit. The comparison among these methods shows that the proposed technique has a higher convergence rate and a wider convergence region than those of other methods.
On sections of elliptic fibrations
Creators: name: Korkmaz, Mustafa
name: Ozbagci, Burak
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M50, 57R17

description: We find a new relation among right-handed Dehn twists in the mapping class group of a $k$-holed torus for $4 \leq k \leq 9$. This relation induces an elliptic Lefschetz pencil structure on the four-manifold \cp $#(9-k)$ \cpb $ $ with $k$ base points and twelve singular fibers. By blowing up the base points we get an elliptic Lefschetz fibration on the complex elliptic surface $E(1)=$ \cp $#9$ \cpb $ \to S^2$ with twelve singular fibers and $k$ disjoint sections. More importantly we can locate these $k$ sections in a Kirby diagram of the induced elliptic Lefschetz fibration. The $n$-th power of our relation gives an explicit description for $k$ disjoint sections of the induced elliptic fibration on the complex elliptic surface $E(n) \to S^2$ for $n \geq 1$.
description: 12 pages, 12 figures
Dynamic coarse-graining of polymer systems using mobility functions
Creators: name: Li, Bing
name: Daoulas, Kostas
name: Schmid, Friederike
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We propose a dynamic coarse-graining (CG) scheme for mapping heterogeneous polymer fluids onto extremely CG models in a dynamically consistent manner. The idea is to use as target function for the mapping a wave-vector dependent mobility function derived from the single-chain dynamic structure factor, which is calculated in the microscopic reference system. In previous work, we have shown that dynamic density functional calculations based on this mobility function can accurately reproduce the order/disorder kinetics in polymer melts, thus it is a suitable starting point for dynamic mapping. To enable the mapping over a range of relevant wave vectors, we propose to modify the CG dynamics by introducing internal friction parameters that slow down the CG monomer dynamics on local scales, without affecting the static equilibrium structure of the system. We illustrate and discuss the method using the example of infinitely long linear Rouse polymers mapped onto ultrashort CG chains. We show that our method can be used to construct dynamically consistent CG models for homopolymers with CG chain length N=4, whereas for copolymers, longer CG chain lengths are necessary
description: to appear in the J. Phys.: Cond. Matter - update of references and small changes in Sec. 2.1
A Classroom Demonstration of Levitation and Suspension of a Superconductor over a Magnetic Track
Creators: name: Strehlow, Charles P.
name: Sullivan, M. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The suspension and levitation of superconductors by permanent magnets is one of the most fascinating consequences of superconductivity, and a wonderful instrument for generating interest in low temperature physics and electrodynamics. We present a novel classroom demonstration of the levitation/suspension of a superconductor over a magnetic track that maximizes levitation/suspension time, separation distance between the magnetic track and superconductor and also insulator aesthetics. The demonstration as described is both inexpensive and easy to construct.
description: 5 pages
Querying RDF Databases with Sub-CONSTRUCTs
Creators: name: Duval, Dominique
name: Echahed, Rachid
name: Prost, Frédéric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Graph query languages feature mainly two kinds of queries when applied to a graph database: those inspired by relational databases which return tables such as SELECT queries and those which return graphs such as CONSTRUCT queries in SPARQL. The latter are object of study in the present paper. For this purpose, a core graph query language GrAL is defined with focus on CONSTRUCT queries. Queries in GrAL form the final step of a recursive process involving so-called GrAL patterns. By evaluating a query over a graph one gets a graph, while by evaluating a pattern over a graph one gets a set of matches which involves both a graph and a table. CONSTRUCT queries are based on CONSTRUCT patterns, and sub-CONSTRUCT patterns come for free from the recursive definition of patterns. The semantics of GrAL is based on RDF graphs with a slight modification which consists in accepting isolated nodes. Such an extension of RDF graphs eases the definition of the evaluation semantics, which is mainly captured by a unique operation called Merge. Besides, we define aggregations as part of GrAL expressions, which leads to an original local processing of aggregations.
description: In Proceedings SCSS 2021, arXiv:2109.02501
Experiment and theory in the Casimir effect
Creators: name: Klimchitskaya, G. L.
name: Mostepanenko, V. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Casimir effect is the attractive force which acts between two plane parallel, closely spaced, uncharged, metallic plates in vacuum. This phenomenon was predicted theoretically in 1948 and reliably investigated experimentally only in recent years. In fact, the Casimir force is similar to the familiar van der Waals force in the case of relatively large separations when the relativistic effects come into play. We review the most important experiments on measuring the Casimir force by means of torsion pendulum, atomic force microscope and micromechanical torsional oscillator. Special attention is paid to the puzzle of the thermal Casimir force, i.e., to the apparent violation of the third law of thermodynamics when the Lifshitz theory of dispersion forces is applied to real metals. Thereafter we discuss the role of the Casimir force in nanosystems including the stiction phenomenon, actuators, and interaction of hydrogen atoms with carbon nanotubes. The applications of the Casimir effect for constraining predictions of extra-dimensional unification schemes and other physics beyond the standard model are also considered.
description: 11 pages, 14 figures
Simple Systems with Anomalous Dissipation and Energy Cascade
Creators: name: Mattingly, Jonathan C.
name: Suidan, Toufic
name: Vanden-Eijnden, Eric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 76F55; 76M35;60J60;37L55

description: We analyze a class of linear shell models subject to stochastic forcing in finitely many degrees of freedom. The unforced systems considered formally conserve energy. Despite being formally conservative, we show that these dynamical systems support dissipative solutions (suitably defined) and, as a result, may admit unique (statistical) steady states when the forcing term is nonzero. This claim is demonstrated via the complete characterization of the solutions of the system above for specific choices of the coupling coefficients. The mechanism of anomalous dissipations is shown to arise via a cascade of the energy towards the modes ($a_n$) with higher $n$; this is responsible for solutions with interesting energy spectra, namely $\EE |a_n|^2$ scales as $n^{-α}$ as $n\to\infty$. Here the exponents $α$ depend on the coupling coefficients $c_n$ and $\EE$ denotes expectation with respect to the equilibrium measure. This is reminiscent of the conjectured properties of the solutions of the Navier-Stokes equations in the inviscid limit and their accepted relationship with fully developed turbulence. Hence, these simple models illustrate some of the heuristic ideas that have been advanced to characterize turbulence, similar in that respect to the random passive scalar or random Burgers equation, but even simpler and fully solvable.
description: 32 Pages
Evaluating preschoolers who are D/HH using LSL (Carden et al., 2024)
Creators: name: Carden, Kameron C.
name: Blaiser, Kristina M.
name: Moog Brooks, Betsy
name: McWilliam, R. A.
Publisher: name: ASHA journals
Year: 2024
Subjects: classificationCode: 420102
subject: Audiology
classificationCode: 470402
subject: Child language acquisition
classificationCode: 390411
subject: Special education and disability

description: Purpose: Many young children who are deaf/hard of hearing (D/HH) using listening and spoken language (LSL) demonstrate improved spoken language outcomes. Anecdotally, one cascading effect of these improved outcomes is that many children are not qualifying for continued services at the age of 3 years during the Individuals with Disabilities Education Act (IDEA) of 2004 Part C to Part B transition due to norm-referenced language performance within the average range. Although norm-referenced performance is one metric for determining language delay and is heavily relied on by educational teams, these siloed measures do not reflect listening, language, and learning demands of a typical preschool classroom. This tutorial highlights the research-to-practice gap currently existing in school-based contexts when evaluating a young child who is D/HH using LSL for special education services.Conclusions: An evidence-based framework for ecologically valid, school-based evaluations during the transition period from IDEA (2004) Part C to Part B for young children who are D/HH using LSL between 30 and 35 months of age is presented that balances sensitivity with feasibility. With a particular emphasis on assessment practices for spoken language, the framework connects the purpose of special education eligibility evaluations with evidence-based practice guidance from the literature.Supplemental Material S1. Evaluation checklist for a preschooler who is D/HH using LSL during the IDEA (2004) Part C to Part B transition.Carden, K. C., Blaiser, K. M., Moog Brooks, B., & McWilliam, R. A. (2024). Evidence-based practices for evaluating preschoolers who are deaf/hard of hearing using listening and spoken language for special education eligibility. Perspectives of the ASHA Special Interest Groups, 9(5), 1377–1397. https://doi.org/10.1044/2024_PERSP-24-00081
Speech BERT Embedding For Improving Prosody in Neural TTS
Creators: name: Chen, Liping
name: Deng, Yan
name: Wang, Xi
name: Soong, Frank K.
name: He, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper presents a speech BERT model to extract embedded prosody information in speech segments for improving the prosody of synthesized speech in neural text-to-speech (TTS). As a pre-trained model, it can learn prosody attributes from a large amount of speech data, which can utilize more data than the original training data used by the target TTS. The embedding is extracted from the previous segment of a fixed length in the proposed BERT. The extracted embedding is then used together with the mel-spectrogram to predict the following segment in the TTS decoder. Experimental results obtained by the Transformer TTS show that the proposed BERT can extract fine-grained, segment-level prosody, which is complementary to utterance-level prosody to improve the final prosody of the TTS speech. The objective distortions measured on a single speaker TTS are reduced between the generated speech and original recordings. Subjective listening tests also show that the proposed approach is favorably preferred over the TTS without the BERT prosody embedding module, for both in-domain and out-of-domain applications. For Microsoft professional, single/multiple speakers and the LJ Speaker in the public database, subjective preference is similarly confirmed with the new BERT prosody embedding. TTS demo audio samples are in https://judy44chen.github.io/TTSSpeechBERT/.
Misure di welfare e contrattazione collettiva di categoria
Creators: name: Comande' Daniela
Publisher: name: Zenodo
Year: 2019
Subjects: Welfare
Contratti collettivi

description: Il saggio approfondisce le misure di welfare adottate dalle parti sociali per fronteggiare la stagnazione salariale dovuta alla crisi economica che ha colpito fortemente l’Italia negli ultimi 10 anni. Sull’onda delle leggi di stabilità che dal 2015 in poi hanno provato ad incentivare le misure negoziali, si esamina la funzione complementare e sussidiaria assolta dai contratti collettivi in rapporto al modello di welfare pubblicistico. Il legislatore ha inteso aderire, attraverso lo strumento delle politiche fiscali, ad un paradigma più ampio di welfare contrattuale categoriale/settoriale, non limitato al solo livello periferico. Per questa via si favorisce non solo una più efficace interazione della rete di collegamenti tra negoziati collettivi e prestazioni/servizi di welfare, ma anche una maggiore estensione della copertura e delle tutele approntate.
Goal Oriented Adaptive Finite Element Method for the Precise Simulation of Optical Components
Creators: name: Zschiedrich, L.
name: Burger, S.
name: Pomplun, J.
name: Schmidt, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Adaptive finite elements are the method of choice for accurate simulations of optical components. However as shown recently by Bienstman et al. many finite element mode solvers fail to compute the propagation constant's imaginary part of a leaky waveguide with sufficient accuracy. In this paper we show that with a special goal oriented error estimator for capturing radiation losses this problem is overcome.
description: 9 pages, 4 figures
Charge order at high temperature in cuprate superconductors
Creators: name: Arpaia, Riccardo
name: Ghiringhelli, Giacomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The presence of different electronic orders other than superconductivity populating the phase diagram of cuprates suggests that they might be the key to disclose the mysteries of this class of materials. In particular charge order in the form of charge density waves (CDW), i.e., the incommensurate modulation of electron density in the CuO$_2$ planes, is ubiquitous across different families and presents a clear interplay with superconductivity. Until recently, CDW had been found to be confined inside a rather small region of the phase diagram, below the pseudogap temperature and the optimal doping. This occurrence might shed doubts on the possibility that such "low temperature phenomenon" actually rules the properties of cuprates either in the normal or in the superconducting states. However, recent resonant X-ray scattering (RXS) experiments are overturning this paradigm. It results that very short-ranged charge modulations permeate a much wider region of the phase diagram, coexisting with CDW at lower temperatures and persisting up to temperatures well above the pseudogap opening. Here we review the characteristics of these high temperature charge modulations, which are present in several cuprate families, with similarities and differences. A particular emphasis is put on their dynamical character and on their coupling to lattice and magnetic excitations, properties that can be determined with high resolution resonant inelastic x-ray scattering (RIXS).
description: 17 pages, 8 figures. Invited paper on the JPSJ Special Issue "Charge orders and fluctuations in high-Tc cuprates"
3-D Photoionization Structure and Distances of Planetary Nebulae III. NGC 6781
Creators: name: Schwarz, Hugo E.
name: Monteiro, Hektor
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Continuing our series of papers on the three-dimensional (3-D) structures of and accurate distances to Planetary Nebulae (PNe), we present our study of the planetary nebula NGC6781. For this object we construct a 3-D photoionization model and, using the constraints provided by observational data from the literature we determine the detailed 3-D structure of the nebula, the physical parameters of the ionizing source and the first precise distance. The procedure consists in simultaneously fitting all the observed emission line morphologies, integrated intensities and the 2-D density map from the [SII] line ratios to the parameters generated by the model, and in an iterative way obtain the best fit for the central star parameters and the distance to NGC6781, obtaining values of 950+-143pc and 385 Lsun for the distance and luminosity of the central star respectively. Using theoretical evolutionary tracks of intermediate and low mass stars, we derive the mass of the central star of NGC6781 and its progenitor to be 0.60+-0.03 Msun and 1.5+-0.5 Msun respectively.
description: 16 pp, 6 figues, 2 tables, submitted to the ApJ
Seminar for older adults with hearing loss (Gaeta & Ahlquist, 2024)
Creators: name: Gaeta, Laura
name: Ahlquist, Julia
Publisher: name: ASHA journals
Year: 2024
Subjects: classificationCode: 420102
subject: Audiology
classificationCode: 420301
subject: Aged health care
classificationCode: 390301
subject: Continuing and community education

description: Purpose: Despite the recognized benefits of aural rehabilitation (AR), its adoption has been limited. The purpose of this study was to investigate the effectiveness of group AR through an educational seminar for older adults with hearing loss, “Optimal Hearing,” evaluating the application of various patient-reported outcome measures.Method: Participants were older adults with hearing loss. The seminar covered content such as hearing loss and aging, audiogram interpretation, clear speech, lipreading, and hearing aids. Small group activities for personalized instruction also included: the Client Oriented Scale of Improvement (COSI), Communication Confidence Profile (CCP), and, a study-specific measure, the Optimum Hearing Questionnaire (OHQ).Results: Participants experienced significant improvements in various areas measured by the COSI. The CCP showed significant change in one item (confidence while conversing with friends in a noisy restaurant), while several items on the OHQ indicated significant changes postintervention.Conclusion: The findings suggest the potential clinical utility of these measures in group AR settings and the importance of individualized goal setting.Supplemental Material S1. Optimum Hearing Questionnaire.Gaeta, L., & Ahlquist, J. (2024). Effectiveness of an educational seminar for older adults with hearing loss. Perspectives of the ASHA Special Interest Groups, 9(5), 1343–1351. https://doi.org/10.1044/2024_PERSP-24-00038
Seoul National University Bright Quasar Survey in Optical (SNUQSO). II. Discovery of 40 Bright Quasars Near the Galactic Plane
Creators: name: Im, Myungshin
name: Lee, Induk
name: Cho, Yunseok
name: Choi, Changsu
name: Ko, Jongwan
name: Song, Mimi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of 40 bright quasars and active galactic nuclei (AGNs) at low Galactic latitude (b<20deg). The low Galactic latitude region has been considered a place to avoid when searching for extragalactic sources, because of the high Galactic extinction, as well as a large number of stars contaminating the sample selection. Bright quasars (R
description: 16 pages, 3 figures
Διαφορές φύλου παιδιών ηλικίας 6 χρονών στην κατανόηση και στη συμπεριφορά απέναντι στην αναπηρία
Creators: name: Κωνσταντάκη, Μαρία Ηρακλή
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Στάσεις
αποδοχή
ειδικές εκπαιδευτικές ανάγκες
attitudes
acceptance
special educational needs

description: Σκοπός της παρούσας έρευνας ήταν η εκτίμηση των διαφορών φύλου παιδιών ηλικίας 6 χρόνων στην κατανόηση και στη συμπεριφορά απέναντι στην αναπηρία. Στην έρευνα συμμετείχαν 200 παιδιά που φοιτούσαν στην Α’ δημοτικού δημοσίων σχολείων των νομών Θεσσαλονίκης, Χαλκιδικής και Σερρών. Η αξιολόγηση της κατανόησης και της συμπεριφοράς των παιδιών έγινε με τη συμπλήρωση ερωτηματολογίων που εφαρμόσθηκε στους μαθητές από την ερευνήτρια με τη μορφή συνέντευξης. Από την ανάλυση των αποτελεσμάτων φάνηκε πως το φύλο δεν επηρεάζει το βαθμό κατανόησης της αναπηρίας από τα παιδιά τυπικής ανάπτυξης στην πρωτοσχολική ηλικία. Συμπερασματικά, φάνηκε πως το φύλο δεν επηρεάζει το βαθμό κατανόησης και την αποδοχή της αναπηρίας από τους συνομηλίκους τους με τυπική ανάπτυξη
description: The aim of this current survey was the assessment of the sex differences in six-year old children concerning their comprehension and behavior towards disability. The two hundred children who participated in this research were in the first year of state primary schools in the prefectures of Thessaloniki, Chalkidiki and Serres. The evaluation of children's comprehension and behavior was carried out through questionnaires completion distributed to the students by the researcher in the form of an interview. From the analysis of the results it was evident that the sex does not affect the degree of the disability comprehension by the children in average development at the age of preschool years. In conclusion, it was evident that the sex does not affect the degree of the disability comprehension and the acceptance by the children with typical development
Driven quantum spin chain in the presence of noise: Anti-Kibble-Zurek behavior
Creators: name: Singh, Manvendra
name: Gangadharaiah, Suhas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study defect generation in a quantum XY-spin chain arising due to the linear drive of the many-body Hamiltonian in the presence of a time-dependent fast Gaussian noise. The main objective of this work is to quantify analytically the effects of noise on the defect density production. In the absence of noise, it is well known that in the slow sweep regime, the defect density follows the Kibble-Zurek (KZ) scaling behavior with respect to the sweep speed. We consider time-dependent fast Gaussian noise in the anisotropy of the spin-coupling term [$γ_0=(J_1-J_2)/(J_1+J_2)$] and show via analytical calculations that the defect density exhibits anti-Kibble-Zurek (AKZ) scaling behavior in the slow sweep regime. In the limit of large chain length and long time, we calculate the entropy and magnetization density of the final decohered state and show that their scaling behavior is consistent with the AKZ picture in the slow sweep regime. We have also numerically calculated the sub-lattice spin correlators for finite separation by evaluating the Toeplitz determinants and find results consistent with the KZ picture in the absence of noise, while in the presence of noise and slow sweep speeds the correlators exhibit the AKZ behavior. Furthermore, by considering the large $n$-separation asymptotes of the Toeplitz determinants, we further quantify the effect of the noise on the spin-spin correlators in the final decohered state. We show that while the correlation length of the sub-lattice correlator scales according to the AKZ behavior, we obtain different scaling for the magnetization correlators.
description: 11 pages, 10 figures
On the VLSI complexity and architecture of the Arithmetic Fourier Transform (AFT)
Creators: name: Antezana, Oswaldo
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents a novel logarithmic-depth VLSI network for implementing a fundamental computation of the Arithmetic Fourier Transform (AFT). The VLSI optimality —in terms of area-time trade-off— of this Orthogonal Flat Tree (OFT) network is proved. Namely, it is proven that the area of the network is 0(N2) and the corresponding total time delay is 0(log N). In addition, a number of layout rules for the construction of this network is proposed. The topology of this network is fairly simple and is based on an orthogonal interconnection of binary trees and linear arrays, or flat trees, where the nodes of the trees are bit-serial devices (adders and distributed shift registers). This OFT network uses only a small number of bit-serial adders to implement a matrix-vector multiplication. Moreover, two architectures for the computational area are considered and their respective bounds are proved. From this discussion it can be concluded that the interconnection area is dominant as the area for computation is relatively small of the order Nlog²N. In addition, an upper-bound on the area of the butterfly network , proposed in [31] for the first stage of the AFT, is introduced. This network computes the Bruns averages vector which constitutes one of the inputs to the OFT network. These two networks can lead to a practical implementation of the AFT. Finally, the oversampling problem of the AFT algorithm is also studied. When using the butterfly network it is proved that to obtain all the samples required takes an area slightly larger than 0(N2) which can result in a non-optimal AT2 bound. This is due to the large number that need to be averaged, up to 2N numbers, for a single multiple-input AFT butterfly. However, for practical sizes (N=16, 32) of a butterfly network the AT2 bound is very close to the optimal bound.
Impact of Coulomb interaction and Kondo effect on transport in quantum dots
Creators: name: Golub, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We examine the impact of Coulomb electron-electron interaction on transport in a junction with a quantum dot described by Kondo Hamiltonian. We analyze the Fermi liquid regime and consider the limit of zero temperature. With the help of Keldysh technique we calculate the non-linear current and shot noise as a function of applied voltage. We show that Coulomb interaction markable influences the universal effective charge of current-carrying particles e*=5/3e which can be measured in shot-noise experiments. The electron-electron interaction modifies this universal value by a factor (e*=5/3eF) which is less then one and also voltage dependent.
description: 6 pages, 5 figures. Revised version with added calculations of shot noise and effectve charge. Complete 1/N expansion is presented
Chemical characterization and in vitro toxicity on human bronchial epithelial cells BEAS-2B of PM$_{2.5}$ from an urban site under industrial emission influence
Creators: name: Courcot, Dominique
name: Landkocz, Yann
name: Billet, Sylvain
name: Ledoux, Frédéric
name: Verdin, Anthony
name: Martin, Perrine
name: Cazier, Fabrice
Publisher: name: Karlsruhe
Year: 2019
Subjects: Fine and ultrafine particles
chemical composition
BEAS-2B cells
cytotoxicity
biotransformation
genotoxicity

description: Particulate Matter (PM) is one of the most relevant environment-related health issues all over the world. In 2013, the International Agency for Research on Cancer (IARC) has classified air pollution and PM as a carcinogen for humans [1]. However, the mechanisms involved in the toxicity of these particles remains poorly understood, mainly because PM are uniquely complex owing to their physicochemical characteristics. In this study, fine particles were collected in the city center of Dunkirk, northern France using a 5 stages high volume cascade impactor (Staplex® 235, 68m3/h) and a Digitel DA80 high volume sampler (30m3/h).Samples were extensively characterized for their physico-chemical properties, including trace metals, water-soluble ions and organic species. Normal human bronchial epithelial cells (BEAS-2B) were used as cell model for toxicological analysis. Cytotoxicity, PAHs-metabolizing enzymes gene expression and genotoxic alterations were evaluated after 24, 48 or 72 h of exposure considering increasing concentrations of PM$_{2.5-0.3}$, organic extracts (OE) and water-soluble fraction (WF) of PM$_{2.5-0.3}$ and PM$_{2.5}$. Several sources such as road traffic, industrial activities mainly related to steelmaking, marine emissions including sea-salts and shipping, as well as soil resuspension were found to contribute to the PM$_{2.5}$ composition. Cytotoxicity assessment results showed time and dose dependent responses, with effects mainly related to PAH compounds in PM$_{2.5}$ OE in which their content were 12 times higher than in PM$_{2.5-0.3}$ one [2]. Differences in the induction of CYP1A1, CYP1B1 and NQO1 genes expression involved in the metabolic activation of organic compounds, as well as genotoxic effects (oxidative DNA adducts, H2A.X phosphorylation) were also evidenced after cells exposure to OE and PM$_{2.5-0.3}$ [3]. These results confirm the major effect of organic compounds on toxic effects, but also the potential contribution of the inorganic fraction of the PM which maintains longer the effects in exposed cells.
Micromagnetic Monte Carlo method with variable magnetization length based on the Landau-Lifshitz-Bloch equation for computation of large-scale thermodynamic equilibrium states
Creators: name: Lepadatu, Serban
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An efficient method for computing thermodynamic equilibrium states at the micromagnetic length scale is introduced, using the Markov chain Monte Carlo method. Trial moves include not only rotations of vectors, but also a change in their magnetization length. The method is parameterized using the longitudinal susceptibility, reproduces the same Maxwell-Boltzmann distribution as the stochastic Landau-Lifshitz-Bloch equation, and is applicable both below and above the Curie temperature. The algorithm is fully parallel, can be executed on graphical processing units, and efficiently includes the long range dipolar interaction. This method is generally useful for computing finite-temperature relaxation states both for uniform and non-uniform temperature profiles, and can be considered as complementary to zero-temperature micromagnetic energy minimization solvers, with comparable computation time. Compared to the dynamic approach it is shown the micromagnetic Monte Carlo method is up to almost 20 times faster. Moreover, unlike quasi-zero temperature approaches which do not take into account the magnetization length distribution and stochasticity, the method is better suited for structures with unbroken symmetry around the applied field axis, granular films, and at higher temperatures and fields. In particular, applications to finite-temperature hysteresis loop modelling, chiral magnetic thin films, granular magnetic media, and artificial spin ices are discussed.
Monoclinic EuSn$_2$As$_2$: A Novel High-Pressure Network Structure
Creators: name: Zhao, Lin
name: Yi, Changjiang
name: Wang, Chang-Tian
name: Chi, Zhenhua
name: Yin, Yunyu
name: Ma, Xiaoli
name: Dai, Jianhong
name: Yang, Pengtao
name: Yue, Binbin
name: Cheng, Jinguang
name: Hong, Fang
name: Wang, Jian-Tao
name: Han, Yonghao
name: Shi, Youguo
name: Yu, Xiaohui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The layered crystal of EuSn$_2$As$_2$ has a Bi$_2$Te$_3$-type structure in rhombohedral ($R\bar{3}m$) symmetry and has been confirmed to be an intrinsic magnetic topological insulator at ambient conditions. Combining {\it ab initio} calculations and \emph{in-situ} x-ray diffraction measurements, we identify a new monoclinic EuSn$_2$As$_2$ structure in $C2/m$ symmetry above $\sim$14 GPa. It has a three-dimensional network made up of honeycomb-like Sn sheets and zigzag As chains, transformed from the layered EuSn$_2$As$_2$ via a two-stage reconstruction mechanism with the connecting of Sn-Sn and As-As atoms successively between the buckled SnAs layers. Its dynamic structural stability has been verified by phonon mode analysis. Electrical resistance measurements reveal an insulator-metal-superconductor transition at low temperature around 5 and 15 GPa, respectively, according to the structural conversion, and the superconductivity with a \textit{T}${\rm {_C}}$ value of $\sim 4$ K is observed up to 30.8 GPa. These results establish a high-pressure EuSn$_2$As$_2$ phase with intriguing structural and electronic properties and expand our understandings about the layered magnetic topological insulators.
Tetraquark molecular states in the $D_s\bar{D}_{s1}$ and $D_s^*\bar{D}_{s0}^*$ mass spectrum
Creators: name: Wang, Zhi-Gang
name: Yang, Xiao-Song
name: Xin, Qi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the present work, we construct the color-singlet-color-singlet type four-quark currents to investigate the $D_s\bar{D}_{s1}$ and $D_s^*\bar{D}_{s0}^*$ tetraquark molecular states with the $J^{PC}=1^{--}$ and $1^{-+}$ via the QCD sum rules, and obtain satisfactory results. We can search for the $D_s\bar{D}_{s1}$ and $D_s^*\bar{D}_{s0}^*$ tetraquark molecular states with the $J^{PC}=1^{--}$ and $1^{-+}$ at the BESIII and Belle II in the future.
description: 11 pages, 4 figures
Generalized Heisenberg Algebras and Fibonacci Series
Creators: name: de Souza, J.
name: Curado, E. M. F.
name: Rego-Monteiro, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have constructed a Heisenberg-type algebra generated by the Hamiltonian, the step operators and an auxiliar operator. This algebra describes quantum systems having eigenvalues of the Hamiltonian depending on the eigenvalues of the two previous levels. This happens, for example, for systems having the energy spectrum given by Fibonacci sequence. Moreover, the algebraic structure depends on two functions f(x) and g(x). When these two functions are linear we classify, analysing the stability of the fixed points of the functions, the possible representations for this algebra.
description: 24 pages, 2 figures, subfigure.sty