cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 1 of Quasi-dendritic sulfonate-based organic small molecule for high-quality NIR-II bone-targeted imaging
Creators: name: Chen, Pengfei
name: Qu, Fan
name: He, Liuliang
name: Li, Mingfei
name: Sun, Pengfei
name: Fan, Quli
name: Zhang, Chi
name: Li, Daifeng
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 1: Experimental section and supporting figures associated with this article can be found in the online version.
GRB 050223: A dark GRB in a dusty starburst galaxy
Creators: name: Pellizza, L. J.
name: Duc, P. -A.
name: Floc'h, E. Le
name: Mirabel, I. F.
name: Antonelli, L. A.
name: Campana, S.
name: Chincarini, G.
name: Cimatti, A.
name: Covino, S.
name: Della Valle, M.
name: Fiore, F.
name: Fugazza, D.
name: Giommi, P.
name: Goldoni, P.
name: Israel, G. L.
name: Molinari, E.
name: Moretti, A.
name: Piro, L.
name: Saracco, P.
name: Stella, L.
name: Tagliaferri, G.
name: Vietri, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods: We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties. Results: We find a single galaxy within the Swift error box of GRB 050223. It is located at z = 0.584 and its luminosity is L ~ 0.4 L*. Emission lines in the galaxy spectrum imply an intrinsic SFR > 7 Msun/yr, and a large extinction A_V > 2 mag within it. We also detect absorption lines, which reveal an underlying stellar population with an age between 40 Myr and 1.5 Gyr. Conclusions: The identification of a host galaxy with atypical properties using only the X-ray transient suggests that a bias may be present in the former sample of host galaxies. Dust obscuration together with intrinsic faintness are the most probable causes for the darkness of this burst.
description: 4 pages, 2 figures, accepted for publication in Astronomy & Astrophysics
Vorwort
Creators: name: Junkerjürgen, Ralf
Publisher: name: ForAP- Forschungsergebnisse von Absolventen und Promovierenden der SLK
Year: 2019

description: ForAP- Forschungsergebnisse von Absolventen und Promovierenden der SLK, Bd. 2 Nr. 2 (2019): ForAP: Forschungsergebnisse von Absolventen und Promovierenden der Fakultät für Sprach-, Literatur- und Kulturwissenschaften
Βέλτιστη κατανομή ισχύος σε ασύρματο δίκτυο αισθητήρων με χρήση νέου υβριδικού αλγορίθμου Teaching-Learning-Based Optimization – Jaya
Creators: name: Τσιφλικιώτης, Αντώνιος Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ασύρματο δίκτυο αισθητήρων
Βέλτιστη κατανομή ισχύος
Αλγόριθμοι βελτιστοποίησης
Wireless sensor network
Optimal power allocation
Optimization algorithms

description: Σε αυτή την εργασία, εξετάζουμε ένα ασύρματο δίκτυο αισθητήρων, αποτελούμενο από L χωρικά κατανεμημένους αισθητήρες, που υπόκεινται σε προσθετικό Γκαουσιανό θόρυβο μηδενικού μέσου όρου, όπου ο κεντρικός κόμβος αντιμετωπίζει ένα πρόβλημα δυαδικού ελέγχου υπόθεσης (παρουσία ή απουσία σήματος). Καθώς η κατανάλωση ισχύος είναι βασικό χαρακτηριστικό ενός ασύρματου δικτύου αισθητήρων, ο στόχος είναι να ελαχιστοποιήσουμε την συνολική κατανάλωση ισχύος των κόμβων, κατανέμοντας βέλτιστα την διαθέσιμη ισχύ σε κάθε κόμβο, αναφορικά με ένα επιθυμητό κριτήριο απόδοσης, που εδώ προσδιορίζεται ως η πιθανότητα σφάλματος κατά την ανίχνευση στον κεντρικό κόμβο. Για την λύση του προβλήματος, αναπτύξαμε έναν νέο υβριδικό στοχαστικό αλγόριθμο βελτιστοποίησης, ο οποίος ονομάζεται TLBO-Jaya, και είναι αποτέλεσμα υβριδισμού δύο προσφάτως προτεινόμενων αλγορίθμων βελτιστοποίησης, του Teaching-Learning-Based-Optimization (TLBO) και του Jaya αλγορίθμου. Τα αποτελέσματα δείχνουν την ανωτερότητα του προτεινόμενου TLBO-Jaya αλγορίθμου απέναντι στους άλλους αλγορίθμους, παρέχοντας καλύτερες αριθμητικές λύσεις για τις περισσότερες εκ των εξεταζόμενων περιπτώσεων.
description: In this work, we consider a wireless sensor network, consisted of L spatially distributed nodes subject to local Gaussian noise with zero mean, where the fusion center faces a binary hypothesis testing problem (no signal or signal present). Since power consumption is a basic characteristic of a wireless sensor network, the aim is to minimize the total power consumption of the nodes, with respect to a desired performance criterion, which is specified as the detection error probability at the fusion center. We propose a novel hybrid stochastic optimization algorithm, called the TLBO-Jaya algorithm, which is a hybridization of two recently proposed algorithms, the Teaching-Learning-Based Optimization (TLBO) algorithm, and the Jaya algorithm. The results validate that the proposed algorithm emerges as the best algorithm, providing better numerical solutions for the most of tested cases.
Unconventional superconductors under rotating magnetic field II: thermal transport
Creators: name: Vorontsov, A.
name: Vekhter, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a microscopic approach to the calculations of thermal conductivity in unconventional superconductors for a wide range of temperatures and magnetic fields. Our work employs the non-equilibrium Keldysh formulation of the quasiclassical theory. We solve the transport equations using a variation of the Brandt-Pesch-Tewordt (BPT) method, that accounts for the quasiparticle scattering on vortices. We focus on the dependence of the thermal conductivity on the direction of the field with the respect to the nodes of the order parameter, and discuss it in the context of experiments aiming to determine the shape of the gap from such anisotropy measurements. We consider quasi-two dimensional Fermi surfaces with vertical line nodes and use our analysis to establish the location of gap nodes in heavy fermion CeCoIn$_5$ and organic superconductor $κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$.
description: 17 pages, 13 figures
Squeeze-and-Excitation Normalization for Automated Delineation of Head and Neck Primary Tumors in Combined PET and CT Images
Creators: name: Iantsen, Andrei
name: Visvikis, Dimitris
name: Hatt, Mathieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Development of robust and accurate fully automated methods for medical image segmentation is crucial in clinical practice and radiomics studies. In this work, we contributed an automated approach for Head and Neck (H&N) primary tumor segmentation in combined positron emission tomography / computed tomography (PET/CT) images in the context of the MICCAI 2020 Head and Neck Tumor segmentation challenge (HECKTOR). Our model was designed on the U-Net architecture with residual layers and supplemented with Squeeze-and-Excitation Normalization. The described method achieved competitive results in cross-validation (DSC 0.745, precision 0.760, recall 0.789) performed on different centers, as well as on the test set (DSC 0.759, precision 0.833, recall 0.740) that allowed us to win first prize in the HECKTOR challenge among 21 participating teams. The full implementation based on PyTorch and the trained models are available at https://github.com/iantsen/hecktor
description: 7 pages, 2 figures, 2 tables
High Sensitivity Torsion Balance Tests for LISA Proof Mass Modeling
Creators: name: Schlamminger, S.
name: Hagedorn, C. A.
name: Famulare, M. G.
name: Pollack, S. E.
name: Gundlach, J. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have built a highly sensitive torsion balance to investigate small forces between closely spaced gold coated surfaces. Such forces will occur between the LISA proof mass and its housing. These forces are not well understood and experimental investigations are imperative. We describe our torsion balance and present the noise of the system. A significant contribution to the LISA noise budget at low frequencies is the fluctuation in the surface potential difference between the proof mass and its housing. We present first results of these measurements with our apparatus.
description: 6th International LISA Symposium
GRB030406 an extremely hard burst outside of the INTEGRAL field of view
Creators: name: Marcinkowski, R.
name: Denis, M.
name: Bulik, T.
name: Goldoni, P.
name: Laurent, Ph.
name: Rau, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the IBIS Compton mode, the INTEGRAL satellite is able to detect and localize bright and hard GRBs, which happen outside of the nominal INTEGRAL telescopes field of view. We have developed a method of analyzing such INTEGRAL data to obtain the burst location and spectra. We present the results for the case of GRB030406. The burst is localized with the Compton events, and the location is consistent with the previous Interplanetary Network position. A spectral analysis is possible with the detailed modeling of the detector response for such a far off-axis source with the offset of 36.9 $^\circ$. The average spectrum of the burst is extremely hard: the photon index above 400 \kev is -1.7, with no evidence of a break up to 1.1 \mev at 90% confidence level.
description: Astronomy and Astrophysics in press
Sprachliche Diskriminierung. Voraussetzungen und Wirkungsweise einer sozialen Praxis in Gesellschaft und Schule
Creators: name: Weber, Maximilian
Publisher: name: ForAP- Forschungsergebnisse von Absolventen und Promovierenden der SLK
Year: 2019

description: Diskriminierung aufgrund von Sprache ist ein wenig beachtetes Phänomen. Die negativen sozialen Folgen, die damit einhergehen, verlangen von der Linguistik jedoch, über die Mechanismen ihres Zustandekommens aufzuklären. Als zentrale Bausteine erweisen sich dabei sprachliche Ideolo-gien und Mythen, auf deren Basis bestimmte Sprechweisen entweder auf- oder abgewertet werden. Sprachliche Diskriminierung als soziale Praxis wird bereits in der Schule eingeübt. Der vorliegende Beitrag legt die Überzeugun-gen von und Einstellungen zu Sprache offen, die sprachlicher Diskriminie-rung zugrunde liegen, und verdeutlicht, wie mit ihrer Hilfe soziale Hierarchien hergestellt werden. Im Anschluss daran wird anhand des Lehrwerks Deutsch-buch (Cornelsen-Verlag) gezeigt, dass ebendiese sprachlichen Ideologien und Mythen auch dem schulischen Nachdenken über Sprache nicht fremd sind.
description: ForAP- Forschungsergebnisse von Absolventen und Promovierenden der SLK, Bd. 2 Nr. 2 (2019): ForAP: Forschungsergebnisse von Absolventen und Promovierenden der Fakultät für Sprach-, Literatur- und Kulturwissenschaften
Η νομική προστασία των Δασών
Creators: name: Μπαρμπαγεωργόπουλος, Θεόδωρος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Νομική Προστασία Δασών
Απαγόρευση Μεταβολής Προορισμού Δασών
Δασικό Δίκαιο
Legal protection of the Forests
Prohibition of alteration of the purpose of forests
Forest Law

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η εξέταση των βασικών πυλώνων της νομικής προστασίας που απολαμβάνουν οι δασικές εκτάσεις στην Ελλάδα. Στα πλαίσια αυτά παρουσιάστηκε η βασική συνταγματική αρχή της απαγόρευσης μεταβολής του προορισμού των δασών, ως θεμελιώδης κατεύθυνση του συντακτικού νομοθέτη αναφορικά με το περιεχόμενο των μετέπειτα νομοθετικών πρωτοβουλιών στον τομέα της δασικής προστασίας. Εν συνεχεία, υπό το πρίσμα της ανωτέρω αρχής, εξετάστηκαν τα ειδικότερα ζητήματα της εξέλιξης του νομοθετικού ορισμού των δασών και των δασικών εκτάσεων, ως μέτρου που καθορίζει την συνολική έκταση των προστατευτέων περιοχών, της εφαρμογής του κανόνα της προληπτικής προστασίας των δασών προκειμένου να αποφευχθεί εξ’ αρχής η μεταβολή του προορισμού τους και τέλος του νομικού πλαισίου της αναδάσωσης, το οποίο αποτελεί το στάδιο της εκ των υστέρων επέμβασης στην δασική έκταση που έχει καταστραφεί, ούτως ώστε να την επαναφέρει στην αρχική της μορφή.
description: The aim of this thesis was to examine the basic pillars of the legal protection entertained by forest lands in Greece. In this context, this thesis presents the basic constitutional principle of the prohibition of alteration of the purpose of forests as a fundamental purpose of the constitutional legislator regarding the content of subsequent legislative initiatives in the field of forest protection. Subsequently, in the light of the aforementioned principle, this thesis examines the particular issues of development of the statutory definition of forests and forest lands as a means to define the total surface of areas deserving protection, the application of the rule of preventive protection of forests in order to avoid the alteration of their nature from the very beginning and, finally, the legal framework of reforestation, which is the stage of post hoc intervention in a destroyed forest land in order to restore its initial form.
Spin Hall effect in a spin-1 chiral semimetal
Creators: name: Tang, Ke
name: Lau, Yong-Chang
name: Nawa, Kenji
name: Wen, Zhenchao
name: Xiang, Qingyi
name: Sukegawa, Hiroaki
name: Seki, Takeshi
name: Miura, Yoshio
name: Takanashi, Koki
name: Mitani, Seiji
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-1 chiral semimetal is a new state of quantum matter hosting unconventional chiral fermions that extend beyond the common Dirac and Weyl fermions. B20-type CoSi is a prototypal material that accommodates such an exotic quasiparticle. To date, the spin transport properties in the spin-1 chiral semimetals, have not been explored yet. In this work, we fabricated B20-CoSi thin films on sapphire c-plane substrates by magnetron sputtering and studied the spin Hall effect (SHE) by combining experiments and first-principles calculations. The SHE of CoSi using CoSi/CoFeB/MgO heterostructures was investigated via spin Hall magnetoresistance and harmonic Hall measurements. First-principles calculations yield an intrinsic spin Hall conductivity (SHC) at the Fermi level that is consistent with the experiments and reveal its unique Fermi-energy dependence. Unlike the Dirac and Weyl fermion-mediated Hall conductivities that exhibit a peak-like structure centering around the topological node, SHC of B20-CoSi is odd and crosses zero at the node with two antisymmetric local extrema of opposite sign situated below and above in energy. Hybridization between Co d-Si p orbitals and spin-orbit coupling are essential for the SHC, despite the small (~1%) weight of Si p-orbital near the Fermi level. This work expands the horizon of topological spintronics and highlights the importance of Fermi-level tuning in order to fully exploit the topology of spin-1 chiral fermions for spin current generation.
description: 24 pages, 6 figures
Comparative performance of the BGI and Illumina sequencing technology for single-cell RNA-sequencing
Creators: name: Senabouth, Anne
name: Andersen, Stacey B.
name: Qianyu Shi
name: Shi, Lei
name: Jiang, Feng
name: Wenwei Zhang
name: Wing, Kristof
name: Daniszewski, Maciej
name: Lukowski, Samuel W.
name: Hung, Sandy S.C.
name: Nguyen, Quan H.
name: Fink, Lynn
name: Beckhouse, Antony
name: Pébay, Alice
name: Hewitt, Alex W.
name: Powell, Joseph E.
Publisher: name: F1000 Research Limited
Year: 2019

description: The libraries generated by high-throughput single cell RNA-sequencing platforms such as the Chromium from 10x Genomics require considerable amounts of sequencing, typically due to the large number of cells. The ability to use this data to address biological questions is directly impacted by the quality of the sequence data. Here we have compared the performance of the Illumina NextSeq 500 and NovaSeq 6000 against the BGI MGISEQ-2000 platform using identical Single Cell 3’ libraries consisting of over 70,000 cells. Our results demonstrate a highly comparable performance between the NovaSeq 6000 and MGISEQ-2000 in sequencing quality, in addition to cell, UMI, and gene detection. However, compared with the NextSeq 500, the MGISEQ-2000 platform performs consistently better, identifying more cells, genes, and UMIs at equalized read depth. We were able to call an additional 1,065,659 SNPs from sequence data generated by the BGI platform, enabling an additional 14% of cells to be assigned to the correct donor from a multiplexed library. However, both the NextSeq 500 and MGISEQ-2000 detected similar frequencies of gRNAs from a pooled CRISPR single cell screen. Our study provides a benchmark for high capacity sequencing platforms applied to high-throughput single cell RNA-seq libraries.
An ecologically valid examination of event-based and time-based prospective memory using immersive virtual reality: the effects of delay and task type on everyday prospective memory
Creators: name: Kourtesis, Panagiotis
name: Collina, Simona
name: Doumas, Leonidas A. A.
name: MacPherson, Sarah E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: J.4; J.3; K.4.0

description: Recent research has focused on assessing either event- or time-based prospective memory (PM) using laboratory tasks. Yet, the findings pertaining to PM performance on laboratory tasks are often inconsistent with the findings on corresponding naturalistic experiments. Ecologically valid neuropsychological tasks resemble the complexity and cognitive demands of everyday tasks, offer an adequate level of experimental control, and allow a generalisation of the findings to everyday performance. The Virtual Reality Everyday Assessment Lab (VR-EAL), an immersive virtual reality neuropsychological battery with enhanced ecological validity, was implemented to comprehensively assess everyday PM (i.e., focal and non-focal event-based, and time-based). The effects of the length of delay between encoding and initiating the PM intention and the type of PM task on everyday PM performance were examined. The results revealed that everyday PM performance was affected by the length of delay rather than the type of PM task. The effect of the length of delay differentially affected performance on the focal, non-focal, and time-based tasks and was proportional to the PM cue focality (i.e., semantic relationship with the intended action). This study also highlighted methodological considerations such as the differentiation between functioning and ability, distinction of cue attributes, and the necessity of ecological validity.
description: 9 Figures, 4 Tables
XMM-Newton view of MS0735+7421: the most energetic AGN outburst in a galaxy cluster
Creators: name: Gitti, Myriam
name: McNamara, Brian R.
name: Nulsen, Paul E. J.
name: Wise, Michael W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the possible cosmological effects of powerful AGN outbursts in galaxy clusters by starting from the results of an XMM-Newton observation of the supercavity cluster MS0735+7421.
description: 6 pages, 5 figures. To appear in the Proceedings of "Heating vs. Cooling in Galaxies and Clusters of Galaxies", August 2006, Garching (Germany)
Τεχνικές προσομοίωσης διαδικασιών σύναψης δημοσίων συμβάσεων για χρήση στην εκπαίδευση και στην αξιολόγηση των υπαλλήλων που ασκούν καθήκοντα σχετικά με τις ανωτέρω διαδικασίες
Creators: name: Φουντουκίδης, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Προμήθεια
Εκπαίδευση
Προσομοίωση
Procurement
Education
Simulation

description: Σκοπός της παρούσας εργασίας, είναι η μελέτη της εφαρμογής διαδικτυακών υπηρεσιών, για την αναπαράσταση, με τη χρήση τεχνικών προσομοίωσης, των διαδικασιών σύναψης δημοσίων συμβάσεων, με σκοπό την εκπαίδευση αλλά και τη συμβουλευτική, των λειτουργών της δημόσιας διοίκησης που εμπλέκονται καθ’ οιοδήποτε ρόλο στη σχετική διαδικασία. Ειδικότερα, εξετάζονται τα πλεονεκτήματα και τα μειονεκτήματα της εξ’ αποστάσεως εκπαίδευσης των ενηλίκων που επιθυμούν να αποκτήσουν γνώση σε θέματα που σχετίζονται με τη σύναψη δημοσίων συμβάσεων, σε σχέση με τις παραδοσιακές μορφές εκπαίδευσης και παρουσιάζονται λογισμικά για τη δημιουργία εικονικών μαθημάτων. Τέλος, συγκεντρώθηκαν τα συχνότερα επαναλαμβανόμενα λάθη που παρατηρούνται στις διαγωνιστικές διαδικασίες προμηθειών όπως αυτά μνημονεύονται σε κατευθυντήριες οδηγίες και οδηγούς που έχει εκδώσει η Ενιαία Ανεξάρτητη Αρχή Δημοσίων Συμβάσεων και η Ευρωπαϊκή Ένωση και μελετήθηκε η δημιουργία σεναρίου προσομοίωσης σύναψης σύμβασης για την προμήθεια υγειονομικού υλικού, με τη χρήση ελεύθερου λογισμικού ανοικτού κώδικα.
description: The aim of this thesis is to study the implementation of web services for the simulation of public procurement procedures, using simulation techniques in order to educate and counsel the officers of public administration who are involved at any step of this process. Especially, the advantages and disadvantages of distance education compared to traditional forms of education are examined, concerning participants who wish to acquire knowledge on issues related to public procurement, and the software used to create virtual courses is presented. Finally, the most frequently repeated errors in tendering procurement procedures are gathered and presented, as they are mentioned in the guidelines and instructions authored by the Hellenic Single Authority for Public Procurement and the European Union and finally, the creation of a procurement simulation scenario for the supply of medical equipment, using a free open source software is presented.
On the Existence of Non-Supersymmetric Black Hole Attractors for Two-Parameter Calabi-Yau's and Attractor Equations
Creators: name: Kaura, Payal
name: Misra, Aalok
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We look for possible nonsupersymmetric black hole attractor solutions for type II compactification on (the mirror of) CY_3(2,128) expressed as a degree-12 hypersurface in WCP^4[1,1,2,2,6]. In the process, (a) for points away from the conifold locus, we show that the attractors could be connected to an elliptic curve fibered over C^8 which may also be "arithmetic" (in some cases, it is possible to interpret the extremization conditions as an endomorphism involving complex multiplication of an arithmetic elliptic curve), and (b) for points near the conifold locus, we show that the attractors correspond to a version of A_1-singularity in the space Image(Z^6-->R^2/Z_2(embedded in R^3)) fibered over the complex structure moduli space. The potential can be thought of as a real (integer) projection in a suitable coordinate patch of the Veronese map: CP^5-->CP^{20}, fibered over the complex structure moduli space. We also discuss application of the equivalent Kallosh's attractor equations for nonsupersymmetric attractors and show that (a) for points away from the conifold locus, the attractor equations demand that the attractor solutions be independent of one of the two complex structure moduli, and (b) for points near the conifold locus, the attractor equations imply switching off of one of the six components of the fluxes. Both these features are more obvious using the atractor equations than the extremization of the black hole potential.
description: 1+29 pages, LaTeX; to appear in Fortsch. der Physik
Interminiband Rabi oscillations in biased semiconductor superlattices
Creators: name: Abumov, Pavel
name: Sprung, D. W. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Carrier dynamics at energy level anticrossings in biased semiconductor superlattices, was studied in the time domain by solving the time-dependent Schroedinger equation. The resonant nature of interminiband Rabi oscillations has been explicitly demonstrated to arise from interference of intrawell and Bloch oscillations. We also report a simulation of direct Rabi oscillations across three minibands, in the high field regime, due to interaction between three strongly coupled minibands.
description: 13 pages, 16 figures
Effects of students’ background vs. school conditions on primary schools students’ academic achievement in Thailand
Creators: name: Chinvarakorn, Vasana
Publisher: name: University of British Columbia
Year: 2009

description: This study attempted to investigate whether or not the results derived from research conducted in industrialized countries, about school resources and school conditions having very little effect on students’ academic achievement when students’ background is controlled for, apply to a developing country such as Thailand. Data on Grade-6 students from the BRIDGES Project in 1987-1988 were analyzed; however, the aggregated nature of data only allowed an investigation at the school level. The analyses show that both sets of variables representing students’ background and school conditions have a significant impact on students’ achievement scores. However, the national-level results do not agree with results from any single region. The study concluded that specific social and economic conditions in each locality seem to have a significant impact on how students’ background and school conditions affect students’ academic achievement; therefore, one should not assume that results from research in industrialized countries will necessarily apply to a developing country, or that national-level results will apply to regions within the country.
Heavy Pair Production Currents with General Quantum Numbers in Dimensionally Regularized NRQCD
Creators: name: Hoang, Andre H.
name: Ruiz-Femenia, Pedro
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the form and construction of general color singlet heavy particle-antiparticle pair production currents for arbitrary quantum numbers, and issues related to evanescent spin operators and scheme-dependences in nonrelativistic QCD (NRQCD) in n=3-2epsilon dimensions. The anomalous dimensions of the leading interpolating currents for heavy quark and colored scalar pairs in arbitrary (2S+1)L_J angular-spin states are determined at next-to-leading order in the nonrelativistic power counting.
description: 39 pages, 2 tables, 10 figures; typos corrected, published version
Biosynthesis of CuO nanoparticles using Mimosa hamata extracts
Creators: name: Ntwampe, Seteno Karabo Obed
Publisher: name: figshare
Year: 2021
Subjects: subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Green chemistry with its objective of overcoming chemical hazards is an attractive method of synthesisingnano-metallic oxides. This study reports for the first time, the green synthesis and characterization ofCuO nanoparticles using Mimosa hamata flower extracts as reducing agents. The X-ray diffraction (XRD),Attenuated total reflection-Fourier transform infrared (ATR/FTIR), and Photoluminescence (PL) spectroscopyanalyses were subsequently performed post-annealing at 500 ?C in air, confirming the formationof Tenorite- based centered monoclinic CuO. The average particle size obtained from the XRD for bothannealed and as-preapred samples varied with the concentrations. The energy band gap calculated fromthe diffuse reflectance was 1.5 eV, 1.3 eV, and 1.2 eV for the different cupric acetate concentrations used,i.e. 0.5, 1.0 and 1.5 g per 10 mL, respectively. The photoluminescence properties obtained at ambienttemperature gave emission peaks at 417 and 437 nm which were ascribed to the near-band-edge emissionpeak of CuO. Furthermore, Anti-bacterial studies were performed on both the as-prepared andannealed CuO for direct application purposes. The as-prepared CuO (liquid form) was demonstrated tohave better antimicrobial activity than the CuO powder formed after annealing at 500 ?C.
Correlation between the scaling factor of the yukawa coupling and cross section for the $e^+ e^- \rightarrow hhf\overline{f}$ ($f\neq t$) in type-I 2HD
Creators: name: Ahmed, Ijaz
name: Gul, Sehrish
name: Khurshid, Taimoor
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The objective of this study is to correlate the scaling factor of the Standard Model (SM) like Higgs boson and the cross section ratio of the process $e^+ e^- \rightarrow hhf\overline{f}$ where $f\neq t$, normalized to SM predictions in the type I of the Two Higgs Doublet Model. All calculations have been performed at $\sqrt{s}=500$ GeV and $1 \leq \tanβ \leq 30$ for masses $m_H = m_A = m_{H^\pm} = 300GeV$ and $m_H=300$ GeV, $m_A=m_{H^\pm}=500$ GeV. The working scenario is by taking without alignment limit, that is $s_{β-α}= 0.98$ and $s_{β-α}= 0.99,$ $0.995$, which gives the enhancement in the cross section, particularly a few times greater than the predictions of the SM due to resonant-impacts of the additional heavy neutral Higgs bosons. This shows that enhancement in cross section occurs on leaving the alignment i.e., $s_{β-α}=1$, at which all the higgs that couple to vector bosons and fermions have the same values as in SM at tree level. A large value of enhancement factor is obtained at $s_{β-α}= 0.98$ compared to $s_{β-α}= 0.99,$ $0 .995$. Furthermore, the decrease in the enhancement factor is observed for the case when $m_H=300$ GeV, $m_A=m_{H^\pm}=500$ GeV. The behavior of the scaling factor with $\tanβ$ is also studied, which shows that for large values of $\tanβ$, the scaling factor becomes equal to $s_{β-α}$. Finally a convincing correlation is achieved by taking into account, the experimental and theoretical constraints e.g, perturbative unitarity, vacuum stability and electroweak oblique parameters.
description: 17 pages, 17 figures. International Journal of Theoretical Physics, 2021
Σχέση Κινητικής Ικανότητας και Σχολικού Εκφοβισμού σε παιδιά δημοτικού σχολείου, ηλικίας 9-12 ετών
Creators: name: Γούλα, Ιωάννα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: εκφοβισμός
θυματοποίηση
αδεξιότητα
bullying
victimization
disorder

description: Σκοπός της παρούσας έρευνας ήταν να εξετάσει τη σχέση μεταξύ κινητικής ικανότητας και σχολικού εκφοβισμού. Συγκεκριμένα, στην έρευνα συμμετείχαν συνολικά 274 παιδιά (150 αγόρια και 124 κορίτσια), ηλικίας 9-12 ετών, τα οποία φοιτούσαν σε δημοτικά σχολεία αγροτικών και αστικών περιοχών των νομών Σερρών και Θεσσαλονίκης. Για τη μέτρηση της κινητικής επίδοσης χρησιμοποιήθηκε το τεστ κινητικής αξιολόγησης Movement Assessment Battery for Children, ενώ η μέτρηση των εμπειριών εκφοβισμού-θυματοποίησης έγινε με τα Ερωτηματολόγια κοινωνικών σχέσεων Student Survey of Bullying Behavior- Revised 2 (SSBB-R2). Από τα αποτελέσματα της παρούσας μελέτης φάνηκε ότι η κινητική απόδοση δε σχετίζεται με τις περισσότερες μεταβλητές εκφοβισμού που αξιολογήθηκαν. Στατιστικά σημαντική επίδραση της κινητικής επίδοσης, υπήρξε μόνο στην κλίμακα του εκφοβισμού. Το σημαντικότερο εύρημα αυτής της μελέτης είναι ότι γενικότερα και στις δυο υποκλίμακες εκφοβισμού (θύτης-θύμα), ο μέσος όρος εμπλοκής σε επεισόδια είτε εκφοβισμού είτε θυματοποίησης ήταν πολύ χαμηλός. Παρόλο που το φαινόμενο του σχολικού εκφοβισμού έχει αναγνωριστεί ως πλέον σημαντικό και έχει δοθεί μεγάλη δημοσιότητα στο θέμα παγκοσμίως, το πρόβλημα στην Ελλάδα δε φαίνεται να είναι τόσο έντονο όπως σε κάποιες άλλες χώρες. Ωστόσο, με την έγκυρη αξιολόγηση των συμπεριφορών εκφοβισμού από την παιδική ακόμη ηλικία, θα μπορέσουμε να κατανοήσουμε το πρόβλημα στην πραγματική του διάσταση και να παρέμβουμε έγκαιρα στους πραγματικά «ευάλωτους» μαθητές που το έχουν ανάγκη.
description: The aim of the present study was to examine the relationship between motor performance and bullying behavior. In particular the sample consisted of 274 children (150 boys and 124 girls), 9-12 years old of primary schools from rural and urban areas from Serres and Thessaloniki. The motor performance was measured with the Movement Assessment Battery for Children (M-ABC) test and the bullying-victim behavior with the questionnaire of social relations Student Survey of Bullying Behavior-Revised 2(SSBB-R2). The results indicate that the motor performance is not associated with the most bullying variables that were assessed. Statistically significant effect of the motor performance was only in the bully scale. However, the most impressive finding of the present research is that in both bullying scales the average of involvement in either bullying incidents or victimization incidents was very low. Although the problem of bullying at schools is recognized as a serious concern and is of high publicity worldwide, it seems that the problem in Greece is not as intensive as in other countries. However, with the valid assessment of bullying behaviors from the early childhood we will be able to understand the problem in its true dimensions and intervene on time in really vulnerable students.
The role of the continuum and the spurious 1- transitions in incoherent mu - e conversion rate calculations
Creators: name: Papakonstantinou, P.
name: Civitarese, O.
name: Kosmas, T. S.
name: Wambach, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: By using the Continuum RPA (CRPA) method, the incoherent transition strength of the exotic mu - e conversion in the 208Pb and 40Ca nuclei is investigated. The question whether excited nuclear states lying high in the continuum give an important contribution to the incoherent rate is addressed. The admixture of spurious components in the rate coming from 1- excitations is investigated in detail by using the self-consistent CRPA with Skyrme interactions as well as a less consistent version and by employing two ways to remove the spurious strength: the use of effective operators or simply the exclusion of the spurious state appearing close to zero energy. In all cases, the correction achieved is quite large.
description: 7 pages, incl. 4 figures; Proc. MEDEX'05 Meeting, Corfu, Greece, Sept.2005
Εξαγωγή υποσχόμενων προκλήσεων από επιστημονικά άρθρα
Creators: name: Δημητριάδης, Δημήτρης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: επεξεργασία φυσικής γλώσσας
ανάλυση αναφορών
ανάλυση λόγου
natural language processing
citation analysis
discourse analysis

description: Αντικείμενο της παρούσας εργασίας είναι η υλοποίηση ενός συστήματος το οποίο θα προτείνει υποσχόμενες προκλήσεις που αναφέρονται σε επιστημονικά άρθρα. Οι προκλήσεις αναγνωρίζονται από έναν καινοτόμο συνδυασμό τεχνικών της επεξεργασίας φυσικής γλώσσας και γραφημάτων και βασίζονται στις σχέσεις μεταξύ των αναφορών που αποκαλύπτονται στα γραφήματα αναφορών. Οι τεχνικές βασισμένες στα γραφήματα αναγνωρίζουν ένα σύνολο άρθρων που πιθανώς περιέχει υποσχόμενες προκλήσεις και οι τεχνικές της επεξεργασίας φυσικής γλώσσας εξάγουν τις προτάσεις στις οποίες εκφράζονται αυτές οι προκλήσεις. Συγκεκριμένα, τα γραφήματα αναφορών αναπαριστούν τις σχέσεις μεταξύ των άρθρων χρησιμοποιώντας τις αναφορές τους. Σύμφωνα με την βιβλιογραφία χρησιμοποιούνται για τον ορισμό βιβλιομετρικών μετρικών και την ανάλυση θεμάτων (topic analysis) αφού οι σχέσεις των αναφορών μεταξύ των άρθρων αποκαλύπτουν ομοιότητες μεταξύ των ερευνητικών περιοχών και συσχετίσεις μεταξύ των θεμάτων. Επίσης μπορούν να αποκαλύψουν την ποιότητα των άρθρων όταν εφαρμόζονται οι κατάλληλες μετρικές. Από την άλλη μεριά ο ρόλος των τεχνικών επεξεργασίας φυσικής γλώσσας είναι σημαντικός διότι αναγνωρίζουν ποια τμήματα των άρθρων μπορούν να αποτελέσουν πρόκληση. Δεδομένης της βιβλιογραφία που έχουμε δεν υπάρχει ένδειξη αντιμετώπισης του προβλήματος των υποσχόμενων προκλήσεων με τον συνδυασμό των δύο τεχνικών. Επίσης, τα αποτελέσματα που προέκυψαν αποδεικνύουν ότι το σύστημα επιλύει το πρόβλημα αλλά επιδέχεται βελτιώσεις.
description: The objective of this research is the implementation of a system that extracts promising challenges described in scientific articles. The challenges are identified by a novel combination of Natural Language Processing and graph-based techniques based on the citing relations expressed through citation graphs. The graph-based techniques identify a set of articles that may contain open challenges, and the Natural Language Processing component extracts the sentences where the challenges are expressed. Specifically, citation graphs represent citing relations among scientific articles using the references. According to the related work. they have mainly been used for the definition of bibliometric measures and topic analysis, since citing relations between articles reveal domain similarities and topic relevance. Moreover, citation graphs may reveal importance of article quality, when appropriate measures are applied. On the other hand, the role of Natural Language Processing techniques are important because they identify which parts of the articles may be promising challenges. To the best of our knowledge there is no work that recommend promising challenges by using a combination of these two techniques. Furthermore, our results are promising and verify that our system is able to solve this problem although it needs improvements.
Hempel's dilemma and the physics of computation
Creators: name: Beenakker, C. W. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Carl Gustav Hempel (1905-1997) formulated the dilemma that carries his name in an attempt to determine the boundaries of physics. Where does physics go over into metaphysics? The purpose of this contribution is to indicate how a recently developed field of research, the physics of computation, might offer a new answer to that old question: The boundary between physics and metaphysics is the boundary between what can and what cannot be computed in the age of the universe.
description: 5 pages
Development of the first Portuguese radar tracking sensor for Space Debris
Creators: name: Pandeirada, João
name: Bergano, Miguel
name: Neves, João
name: Marques, Paulo
name: Barbosa, Domingos
name: Coelho, Bruno
name: Ribeiro, Valério
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Currently, space debris represents a threat for satellites and space-based operations, both in-orbit and during the launching process. The yearly increase in space debris represents a serious concern to major space agencies leading to the development of dedicated space programs to deal with this issue. Ground-based radars can detect Earth orbiting debris down to a few square centimeters and therefore constitute a major building block of a space debris monitoring system. New radar sensors are required in Europe to enhance capabilities and availability of its small radar network capable of tracking and surveying space objects and to respond to the debris increase expected from the New Space economy activities. This article presents ATLAS, a new tracking radar system for debris detection located in Portugal. It starts by an extensive technical description of all the system components followed by a study that estimates its future performance. A section dedicated to waveform design is also presented, since the system allows the usage of several types of pulse modulation schemes such as LFM and phase coded modulations while enabling the development and testing of more advanced ones. By presenting an architecture that is highly modular with fully digital signal processing, ATLAS establishes a platform for fast and easy development, research and innovation. The system follows the use of Commercial-Off-The-Shelf technologies and Open Systems which is unique among current radar systems.
description: Reviewed; Accepted for Publication at Signals, MDPI, ISSN 2624-6120, February 2021; 16 pages, 8 Figures
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2015

description: The following description is provided by the publisher:
 FICTION
 “Man of New Skin” by Gerald Fleming
 “Sparrowbush” by Dennis McFadden
 “The House That Modern Art Built” by Rebecca Rosenblum
 NON-FICTION
 “Dandelion” by Sherry Wong
 DRAMA
 “Houdini” by Kirby Wright
 TRANSLATION
 “Stories Adrift” by Melanie Taylor-Herrera, translated from the Spanish by Christina Vega-Westhoff
 POETRY
 Two Poems by Kathryn Dillard
 Three Poems by Michael Quilty
 Two Poems by Elizabeth Hoover
 Two Poems by Matt McLean
 Three Poems by Julie Paul
 Two Poems by Esther Mazakian
 Three Poems by Ben LaDouceur
 COVER IMAGE
 “Landscapes IV” by Levi van Veluw, courtesy of Ron Mandos Gallery
Thermal valorisation extracts of selected agro-waste for human pathogen antibacterial NiO nanoparticles synthesis
Creators: name: Ntwampe, Seteno Karabo Obed
Publisher: name: figshare
Year: 2021
Subjects: subject: 30199 Analytical Chemistry not elsewhere classified
subject: FOS: Chemical sciences

description: Waste management stays a challenge in developing countries. This research reports on the valorisation ofagro-waste for the synthesis of nickel oxide nanoparticles (NiO NPs), useful as antibacterial agents toassure the sustainable use of renewable waste resources for human health protection. Agro-wasteextracts from Persea americana seed, Zea mays silk and Eucalyptus globulus leaves were used as chelatingagents in combination with nickel nitrate to synthesis NiO NPs. Optical, physical and chemical characteristicsof synthesised NiO NPs were analysed by Ultraviolet spectroscopy studies (UV–VIS analysis), X-raypowder diffraction (XRD) and Scanning Electron Microscopy (SEM); Fourier Transform Infrared analysis(FTIR) and Energy Dispersive X-Ray Spectroscopy (EDS), respectively. Antibacterial activity of each synthesisedNiO-NPs was determined by cell culture in nutrient agar using well diffusion method. TheUV–VIS results showed the formation of NiO NPs at wavelength range 300 – 400 nm. The XRD patternsdemonstrated the crystalline form of the NiO NPs with a lattice face-centered cubic with average size of14, 18 and 19 nm for NiO NPs from Persea americana seed, Zea mays silk and Eucalyptus globulus leaves,respectively. SEM images revealed the spherical, pleomorphism and nanosheet surface shape of the synthesisedNiO NPs. Chemical elements K, P, Mg, Na, C and O were detected by EDS analysis as forming part of the elemental composition of the NiO NPs synthesised. Chemical bending between O–H, C–H, C–C and C-N was observed using FTIR. Furthermore, antibacterial studies showed the efficacy of all the NiO NPs synthesised against pathogen microbial growth with the largest inhibition zone (IZ) of 26 mm for theNiO NPs from Eucalyptus globulus leaves being observed. Therefore, Eucalyptus globulus leaves are recommendedto synthesise NiO NPs for antibacterial applications.
Δρομική οικονομία σε διάφορες μορφές μυικού έργου
Creators: name: Τσιαφίδου, Ευσταθία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Δρομική οικονομία
Τρέξιμο σε δαπεδοεργόμετρο
Κλίσεις στο δαπεδοεργόμετρο
Running economy
Running at treadmill
Slopes at treadmill

description: Σκοπός της παρούσας εργασίας ήταν ο προσδιορισμός της δρομικής οικονομίας και της φυσιολογικής επιβάρυνσης κατά την διάρκεια τρεξίματος σε 10 διαφορετικές συνθήκες ταχύτητας και κλίσης εδάφους. Για το σκοπό αυτό, μετρήθηκαν 8 καρδιοαναπνευστικοί και μεταβολικοί παράμετροι (καρδιακή συχνότητα, πνευμονικός αερισμός, αναπνευστικό πηλίκο, πρόσληψη οξυγόνου σε απόλυτες τιμές, πρόσληψη οξυγόνου σε σχετικές τιμές, ποσοστό της μέγιστης πρόσληψης οξυγόνου, γαλακτικό οξύ, υποκειμενική κλίμακα κόπωσης Borg) σε δείγμα 12 γυναικών ηλικίας 19.4±0,9 ετών, κατά τη διάρκεια τρεξίματος στα 8 km/h και 9 km/h σε 5 διαφορετικές κλίσεις (-5%, -2.5%, 0%, 2.5% και 5%). Κατά τη στατιστική επεξεργασία των αποτελεσμάτων παρουσιάστηκε σημαντική διαφορά σε όλες τις παραμέτρους ανάμεσα στο τρέξιμο σε οριζόντιο επίπεδο και σε ανωφέρεια με κλίση +5%, ενώ δεν παρουσιάστηκε καμιά διαφορά κατά το τρέξιμο σε κλίση -2,6 και -5%. Όλες οι παράμετροι που μετρήθηκαν εμφάνισαν υψηλότερη μέση τιμή στην ταχύτητα των 9 km/h σε σχέση με αυτή των 8 km/h για την ίδια κλίση του επιπέδου τρεξίματος. Ακόμα και η μικρή αυτή μεταβολή της ταχύτητας (1km/h) εμφάνισε στατιστικά σημαντικές διαφορές κυρίως στην κλίση +5%, χωρίς διαφορά όμως στη πρόσληψη οξυγόνου σε απόλυτες τιμές και στο ποσοστό της VO2max. Τέλος, φάνηκε να υπάρχει γραμμική συσχέτιση μεταξύ των παραμέτρων που μετρήθηκαν και της κλίσης του επιπέδου, η ένταση της οποίας όμως δεν διαφέρει σημαντικά μεταξύ των δύο ταχυτήτων.
description: The objective of the present study was the determination of running economy and physiological responses during treadmill running in 10 different speed and slope conditions. For this purpose, 8 physical and metabolic parameters were measured (heart rate, minute ventilation, respiratory quotient, oxygen consumption/ minute, oxygen consumption/ kg of body weight/ min, maximum oxygen volume consumption percentage, blood lactate, Borg Perceived Exertion Scale) in 12 women aged 19.4±0,9 years old, during running at speed of 8 km/h and 9 km/h on 5 different slopes (-5%, -2,5%, 0%, 2,5% and 5%). Statistical difference was found for all parameters between 0% slope running and +5% uphill running, but there was no differene between -2,6% and -5% downhill running. The value of all parameters was greater at the speed of 9 km/h comparing with that of 8 km/h for the same slope. Most parameters, except oxygen consumption/ minute and maximun oxygen volume consumption percentage, differed statistically even with such a small speed change (1 km/h), especially on +5% slope. A strong linear colleration was found between the response and the slope, that didn’t differ between the 2 speeds.
Diffusion Processes in Phase Spaces and Quantum Mechanics
Creators: name: Beniaminov, E. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A diffusion process for charge distributions in a phase space is examined. The corresponding charge moves in a force field and under an action of a random field. There are the diffusion motions for coordinates and for momenta. In our model, an inner state of the charge is defined by a complex vector. The vector rotates with a great constant angular velocity with respect to the proper time of the charge. A state of the diffusion process is a (complex-valued) wave function on the phase space. As in quantum mechanics, we assume that, for the wave functions, the superposition principle holds. The diffusion process averages out vectors of inner states from different points of the phase space. A differential equation for this diffusion process is founded and examined. We demonstrate that the motion (described by this process) decomposes into a fast motion and a slow motion. The fast motion reduces an arbitrary wave function to a function from a subspace whose elements are parameterized by complex-valued functions of coordinates. The slow motion occurs in this subspace and it is described by the Schr\''odinger equation. The parameters of the suggested model are estimated. The duration of the fast motion is of order $10^{-11}$ s.
description: 9 pages