cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ab initio calculations of third-order elastic constants and related properties for selected semiconductors
Creators: name: Lopuszynski, Michal
name: Majewski, Jacek A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present theoretical studies for the third-order elastic constants $C_{ijk}$ in zinc-blende nitrides AlN, GaN, and InN. Our predictions for these compounds are based on detailed ab initio calculations of strain-energy and strain-stress relations in the framework of the density functional theory. To judge the computational accuracy, we compare the ab initio calculated results for $C_{ijk}$ with experimental data available for Si and GaAs. We also underline the relation of the third-order elastic constants to other quantities characterizing anharmonic behaviour of materials, such as pressure derivatives of the second-order elastic constants and the mode Grüneisen constants for long-wavelength acoustic modes.
description: 8 pages, 3 figures, minor language and typos corrections
Hairpin Branes and D-Branes Behind the Horizon
Creators: name: Okuyama, Kazumi
name: Rozali, Moshe
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Lorentzian D-particles in linear dilaton and the two dimensional black hole backgrounds. The D-particle trajectory follows an accelerated trajectory which is smeared by stringy corrections. For the black hole background we find that the portion of the trajectory behind the horizon appears to an asymptotic observer as ghost D-particle. This suggests a way of constructing a matrix model for the Lorentzian black hole background.
description: 27 pages, 3 figures
Φυτεμένες όψεις. Η συμβολή τους στην αναβάθμιση του αστικού τοπίου.:
Creators: name: Στεφανακάκη, Δήμητρα Απόστολου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Φυτεμένες όψεις
Κάθετοι κήποι
Φυτεμένες όψεις με αναρριχώμενα
Vertical Greenery Systems
Vertical gardens/ Green walls
Green screens/ Green façades

description: Η ένταξη των φυτεμένων όψεων στις ευρωπαϊκές στρατηγικές για την ενίσχυση του αστικού πρασίνου, αποτελεί σημαντική κατεύθυνση για την αειφορία των πόλεων. Ειδικότερα, σε αστικές περιοχές, όπου υπάρχει κορεσμός ελεύθερων χώρων, η αξιοποίηση των ανεκμετάλλευτων, κατακόρυφων επιφανειών των κτιρίων, μπορεί να συμβάλλει σημαντικά στην αναβάθμιση του αστικού τοπίου. Τα οφέλη των φυτεμένων όψεων είναι βιοκλιματικά, κοινωνικά και οικονομικά και εντοπίζονται σε διαφορετικές κλίμακες, στην κλίμακα κτιρίου, γειτονιάς και πόλης. Ωστόσο, για να μεγιστοποιηθούν τα οφέλη στις αστικές περιοχές, οι φυτεμένες όψεις θα πρέπει να ενταχθούν σε ένα ευρύτερο δίκτυο πρασίνου, όπου οι όψεις και οι οροφές των κτιρίων θα συνδέονται με τους χώρους πρασίνου. Σε αυτό το πλαίσιο, κυμαίνεται η μελέτη εφαρμογής, η οποία μέσα από την πρόταση φυτεμένων όψεων στο γήπεδο ‘Κλεάνθης Βικελίδης’, στην περιοχή Χαριλάου της Θεσσαλονίκης, μπορεί να αποτελέσει παράδειγμα για αντίστοιχες προτάσεις, με στόχο τη δημιουργία ενός ενιαίου δικτύου πρασίνου, στο οποίο θα συμπεριλαμβάνονται οι όψεις των κτιρίων και οι χώροι πρασίνου. Η συμβολή των φυτεμένων όψεων στην αναβάθμιση της περιοχής μελέτης εξετάζεται μέσα από την εφαρμογή δεικτών (BAF - Biotope Area Factor).
description: The integration of vertical greenery systems in European strategies to enhance urban green, is an important direction for the sustainability of cities. Particularly in urban areas where there is saturation of free sites, the exploitation of untapped, vertical surfaces of buildings can contribute significantly to the upgrading of the urban landscape. The benefits of vertical greenery systems are bioclimatic, social and economic and can be pointed out at multiple scales - the scales of building, neighborhood and city. However, to maximize the benefits in urban areas, the vertical greenery systems should be integrated into a wider green network, where the façades and the roofs of buildings are linked to the parks. Under this aspect, the case study with the topic ‘Vertical greenery systems on the ‘Kleanthis Vikelides' stadium in Harilaou Thessaloniki’, may be an example for similar proposals to create an integrated green network, which will include the façades of the buildings and the green spaces. The contribution of vertical greenery systems to the melioration of the study area is examined through the application of indicators (BAF - Biotope Area Factor).
title: Development of user-friendly enviromental data products: a pilot case for Latvian marine areas
Creators: name: Ikauniece, Anda
name: Brūns, Pēteris
name: Strāķe, Solvita
name: Jurgensone, Iveta
name: Alberte, Madara
name: Jermakovs, Vadims
name: Auniņš, Ainārs
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Joining the attempts of EC ICT project HABITATS and current EC LIFE+ project MARMONI a GIS based tool has been developed. Linked with the several databases the platform provides access to and visualization of sediment substrate and depth records, borders and status of marine protected areas and some additional limitations in the sea use, composition of benthic and pelagic communities in the areas, biodiversity indicators on plankton, benthos, fish and birds
MPEC 2024-T171 : 2024 TO4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TO4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Self-induced density modulations in the free expansion of Bose-Einstein condensates
Creators: name: Salasnich, L.
name: Manini, N.
name: Bonelli, F.
name: Korbman, M.
name: Parola, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We simulate numerically the free expansion of a repulsive Bose-Einstein condensate with an initially Gaussian density profile. We find a self-similar expansion only for weak inter-atomic repulsion. In contrast, for strong repulsion we observe the spontaneous formation of a shock wave at the surface followed by a significant depletion inside the cloud. In the expansion, contrary to the case of a classical viscous gas, the quantum fluid can generate radial rarefaction density waves with several minima and maxima. These intriguing nonlinear effects, never observed yet in free-expansion experiments with ultra-cold alkali-metal atoms, can be detected with the available setups.
description: 4 pages, 4 figures
title: Harmonising data from heterogeneous sources to characterise small pelagic fish habitat in the Mediterranean Sea.
Creators: name: Giannoulaki, Marianna
name: Iglesias, Magdalena
name: Tugores, Pilar
name: Pyrounaki, Maria Myrto
name: Leonori, Iole
name: Campanella, Fabio
name: Bonanno, Angelo
name: Patti, Bernando
name: Bigot, Jean Luis
name: Claire Saraux, Andrea De Felice
name: Tičina, Vjekoslav
name: Basilone, Gualtiero
name: Machias, Athanassios
name: Somarakis, Stylianos
name: Schismenou, Eudoxia
name: Siapatis, Apostolos
name: Tserpes, George
name: Cuttitta, Angela
name: Valavanis, Vasilis
name: Papadopoulou, Nadia
name: Nikolopoulou, Matina
name: Cristina, Michele
name: Martin, Corinne
name: Spedicato, Maria Teresa
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Within the current work, the habitat of small pelagic fish populations in the Mediterranean was assessed combining historic survey data (i.e. acoustic, ichthyoplankton, bottom trawl surveys) from five different areas along with satellite environmental and bathymetry data
Diagnosis of aspergillosis by double immunodiffusion method with home-made Aspergillus antigens and antisera
Creators: name: Nittaya Tripinyipap, Anakana Chaiprasert
Publisher: name: Faculty of Medicine,Srinakharinwirot University
Year: 1997
Subjects: aspergillosis, double immunodiffusion method

description: 1, 4, Journal of Medicine and Health Sciences
title: Integration of multimodal data sources in designing decision support tools for marine resource management.
Creators: name: Sullivan, Timothy
name: Connor, Edel O’
name: Zhang, Dian
name: Briciu-Burghina, Ciprian
name: Heery, Brendan
name: Connor, Noel E. O’
name: Smeaton, Alan F.
name: Regan, Fiona
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Effective integration of science and decision-making requires access to high quality, high frequency and timely data, and the capability to interrogate this data in order to enhance decision-making. The advent of environmental sensing networks has promised a tide of such data to policy and decision makers, however in many instances these networks or indeed the sensors comprising these networks are not yet utilised by managers or monitoring agencies to provide such data. The reasons for this are not yet certain, but may well be related to the perceived difficulties and costs associated with deployment of monitoring systems, and the subsequent limitations and difficulties in interpreting data thus obtained
Effects of kink and flexible hinge defects on mechanical responses of short double stranded DNA molecules
Creators: name: Chen, Hu
name: Yan, Jie
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biomolecules (q-bio.BM)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: We predict various detectable mechanical responses to the presence of local DNA defects which are defined as short DNA segments exhibiting mechanical properties obviously different from the 50 nm persistence length based semiflexible polymer model. The defects discussed are kinks and flexible hinges either permanently fixed on DNA or thermally excited. Their effects on extension shift, the effective persistence length, the end-to-end distance distribution, and the cyclization probability are computed using a transfer-matrix method. Our predictions will be useful in future experimental designs to study DNA nicks or mismatch base pairs, mechanics of specific DNA sequences, and specific DNA-protein interaction using magnetic tweezer, fluorescence resonance energy transfer or plasmon resonance technique, and the traditional biochemistry cyclization probability measurements.
description: 9 pages with 9 figures. Theoretical calculation based on transfer matrix. Minor updates, a new figure and more discussions are added
Garnet-type Li7La3Zr2O12 solid electrolyte thin films grown by CO2-laser assisted CVD for all-solid-state batteries
Creators: name: Loho, Christoph
name: Djenadic, Ruzica
name: Bruns, Michael
name: Clemens, Oliver
name: Hahn, Horst
Publisher: name: Universität Ulm
Year: 2016
Subjects: subject: All-solid-state lithium ion battery
subject: Garnet-type Li7La3Zr2O12
subject: Ionic conductivity
subject: Solid electrolyte
subject: DDC 540 / Chemistry & allied sciences
subject: Chemical vapor deposition
subject: Thin films
subject: Lithium-Ionen-Akkumulator
subject: Gasphasenimprägnierung
subject: Dünnschichttechnik

description: The detailed characterization of garnet-type Li-ion conducting Li7La3Zr2O12 (LLZO) solid electrolyte thin films grown by novel CO2-laser assisted chemical vapor deposition (LA-CVD) is reported. A deposition process parameter study reveals that an optimal combination of deposition temperature and oxygen partial pressure is essential to obtain high quality tetragonal LLZO thin films. The polycrystalline tetragonal LLZO films grown on platinum have a dense and homogeneous microstructure and are free of cracks. A total lithium ion conductivity of 4.2·10−6 S·cm−1 at room temperature, with an activation energy of 0.50 eV, is achieved. This is the highest total lithium ion conductivity value reported for tetragonal LLZO thin films so far, being about one order of magnitude higher than previously reported values for tetragonal LLZO thin films prepared by sputtering and pulsed laser deposition. The results of this study suggest that the tetragonal LLZO thin films grown by LA-CVD are applicable for the use in all-solid-state thin film lithium ion batteries.
title: Ecosystem monitoring of marine areas in Russia (by the example of the Baltic Sea, the Curonian and Vistula Lagoons)
Creators: name: Aleksandrov, Sergey
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. Assessment of the ecological state and pollution of the environment is one of the important lines of fisheries research in Russia. As an example of ecosystem monitoring in Russia it is possible to review the regular complex monitoring of hydrochemical, radioecological and hydrobiological indicators which is carried out by «AtlantNIRO» in the south-eastern part of the Baltic Sea, the Curonian and Vistula Lagoons
Τεχνική απαλοιφής του offset σε υψηλής ταχύτητας μετατροπείς αναλογικού σήματος σε ψηφιακό αρχιτεκτονικής Flash:
Creators: name: Βάσσου, Χρυσούλα Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Τάση εκτροπής
Υψηλής Ταχύτητας Μετατροπέας αναλογικού σήματος σε ψηφιακό
Αρχιτεκτονική Flash
Offset
High-Speed ADC
Flash Architecture

description: Το αντικείμενο της διπλωματικής εργασίας αφορά στη μελέτη μιας τεχνικής απαλοιφής του offset σε έναν μετατροπέα αναλογικού σήματος σε ψηφιακό υψηλού ρυθμού μετατροπής. Στα πλαίσια της εργασίας μελετήθηκε και σχεδιάστηκε ένας μετατροπέας αναλογικού σήματος σε ψηφιακό ανάλυσης 6-bits σε CMOS τεχνολογία 90nm χρησιμοποιώντας αρχιτεκτονική flash, πολύ χαμηλού offset με το πρόγραμμα σχεδίασης αναλογικών κυκλωμάτων Cadence. Η απαλοιφή του offset πραγματοποιείται στην βαθμίδα του προενισχυτή με ψηφιακό έλεγχο της τάσης υποστρώματος των τρανζίστορ εισόδου και διορθώνει το offset ολόκληρης της αλυσίδας του μετατροπέα. Το γεγονός αυτό επιτρέπει την ελαχιστοποίηση των διαστάσεων των στοιχείων του κυκλώματος, πετυχαίνοντας αύξηση της ταχύτητας του. Ο μετατροπέας A/D αρχικά σχεδιάστηκε με συχνότητα λειτουργίας fs=1.7GHz, σύμφωνα με τις δοθείσες προδιαγραφές λειτουργίας. Στη συνέχεια προσομοιώθηκε σε συχνότητες 2.5GHz και 5GHz. Τα αποτελέσματα των προσομοιώσεων επιβεβαιώνουν την σωστή λειτουργία του ADC καθώς και την θεαματική μείωση του offset σε κάθε περίπτωση. Τέλος, έγινε η φυσική σχεδίαση (layout) του κυκλώματος του μετατροπέα και τα αποτελέσματα της post-layout προσομοίωσης παρατίθενται σε συγκριτικό πίνακα.
description: This work deals with the presentation of a digital offset calibration technique for a high speed analog to digital converter (ADC). In the context of the work, an analog to digital converter with a resolution of 6 bits was studied and designed in CMOS 90nm technology using flash architecture using the analog circuit design program Cadence. The offset calibration is achieved by digitally adjusting the bulk voltages of the preamplifier input devices, correcting the offset of the entire chain of the converter. This way higher speed is achieved by minimizing the dimensions of the circuit components. The ADC was initially designed for operating frequency fs=1.7GHz, in accordance with the required specifications. Then, it was simulated for operating frequencies of 2.5GHz and 5GHz. The simulation results confirm the correct operation of the ADC and the spectacular offset reduction in any case. Finally, the layout of the ADC was extracted and the results of the post-layout simulation are listed in a comparable summary table.
TEXNIK OLIY TA'LIMDA MUAMMOLI TA'LIM TEXNOLOGIYALARINI QO'LLASH
Creators: name: Tursunova, Gulbahor
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada talabalarning bilish faolligi hamda ijodiy mustaqilligini oshirishda muammoli ta’lim metodlaridan foydalanishning ahamiyati, muammoli ta’limning maqsadi, “keys” va “Muammoli vaziyat” metodlarini tashkil etish bosqichlari, o‘qituvchi va talabalarning birgalikdagi faoliyati, mazkur metodlar asosida dars jarayonini tashkil etish algoritmlari kabi masalalar yoritilgan.
Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope
Creators: name: Konopelko, A.
name: Atkins, R. W.
name: Blaylock, G.
name: Buckley, J. H.
name: Butt, Y.
name: Carter-Lewis, D. A.
name: Celik, O.
name: Cogan, P.
name: Chow, Y. C. K.
name: Cui, W.
name: Dowdall, C.
name: Ergin, T.
name: Falcone, A. D.
name: Fegan, D. J.
name: Fegan, S. J.
name: Finley, J. P.
name: Fortin, P.
name: Gillanders, G. H.
name: Gutierrez, K. J.
name: Hall, J.
name: Hanna, D.
name: Horan, D.
name: Hughes, S. B.
name: Humensky, T. B.
name: Imran, A.
name: Jung, I.
name: Kaaret, P.
name: Kenny, G. E.
name: Kertzman, M.
name: Kieda, D. B.
name: Kildea, J.
name: Knapp, J.
name: Kosack, K.
name: Krawczynski, H.
name: Krennrich, F.
name: Lang, M. J.
name: LeBohec, S.
name: Moriarty, P.
name: Mukherjee, R.
name: Nagai, T.
name: Ong, R. A.
name: Perkins, J. S.
name: Pohl, M.
name: Ragan, K.
name: Reynolds, P. T.
name: Rose, H. J.
name: Sembroski, G. H.
name: Schroedter, M.
name: Smith, A. W.
name: Steele, D.
name: Syson, A.
name: Swordy, S. P
name: Toner, J. A.
name: Valcarcel, L.
name: Vassiliev, V. V.
name: Wagner, R. G.
name: Wakely, S. P.
name: Weekes, T. C.
name: White, R. J.
name: Williams, D. A.
name: Zitzer, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescope for a total of 65.5 hrs between 2003 and 2005. The standard two-dimensional analysis developed by the Whipple collaboration for a stand-alone telescope reveals an excess in the field of view at a pre-trials significance level of 6.1 standard deviations. The measured position of this excess is alpha(2000) =20 h 32 m 27 s, delta(2000) = 41 deg 39 min 17 s. The estimated integral flux for this gamma-ray source is about 8% of the Crab-Nebula flux. The data are consistent with a point-like source. Here we present a detailed description of the standard two-dimensional analysis technique used for the analysis of data taken with the Whipple Observatory 10 m telescope and the results for the TeV J2032+4130 campaign. We include a short discussion of the physical mechanisms that may be responsible for the observed gamma-ray emission, based on possible association with known astrophysical objects, in particular Cygnus OB2.
description: Accepted for publication in the Astrophysical Journal
Observation of topological electronic structure in quasi-1D superconductor TaSe3
Creators: name: Chen, Cheng
name: Liang, Aiji
name: Liu, Shuai
name: Nie, Simin
name: Huang, Junwei
name: Wang, Meixiao
name: Li, Yiwei
name: Pei, Ding
name: Yang, Haifeng
name: Zheng, Huijun
name: Zhang, Yong
name: Lu, Donghui
name: Hashimoto, Makoto
name: Barinov, Alexei
name: Jozwiak, Chris
name: Bostwick, Aaron
name: Rotenberg, Eli
name: Kou, Xufeng
name: Yang, Lexian
name: Guo, Yanfeng
name: Wang, Zhijun
name: Yuan, Hongtao
name: Liu, Zhongkai
name: Chen, Yulin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Topological superconductors (TSCs), with the capability to host Majorana bound states that can lead to non-Abelian statistics and application in quantum computation, have been one of the most intensively studied topics in condensed matter physics recently. Up to date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator CuxBi2Se3 and iron-based superconductor FeTe0.55Se0.45. Here, by carrying out synchrotron and laser based angle-resolved photoemission spectroscopy (ARPES), we systematically investigated the electronic structure of a quasi-1D superconductor TaSe3, and identified the nontrivial topological surface states. In addition, our scanning tunneling microscopy (STM) study revealed a clean cleaved surface with a persistent superconducting gap, proving it suitable for further investigation of potential Majorana modes. These results prove TaSe3 as a stoichiometric TSC candidate that is stable and exfoliable, therefore a great platform for the study of rich novel phenomena and application potentials.
description: to appear in Matter
Cooperative output regulation for networks of hyperbolic systems using adaptive cooperative observers
Creators: name: Enderes, Tarik
name: Gabriel, Jakob
name: Deutscher, Joachim
Publisher: name: Universität Ulm
Year: 2024
Subjects: subject: DDC 620 / Engineering & allied operations
subject: Hyperboloid structures
subject: Automatic control
subject: Regelungssystem

description: This paper is concerned with the cooperative output regulation problem for heterogeneous networks of hyperbolic agents. Both the leaders’ output as well as the disturbances are generated by finite-dimensional signal models that are unknown to the followers. An adaptive cooperative reference observer is employed and an infinite-dimensional adaptive cooperative disturbance observer is designed using the backstepping approach to estimate both the states and the signal model parameters. By combining them with a local state feedback regulator, an adaptive cooperative output feedback regulator results. It is shown that the resulting network controlled multi-agent system achieves asymptotic leader–follower output synchronization. The results of the paper are illustrated for a heterogeneous network of three hyperbolic agents in simulations.
title: Improved understanding of marine biodiversity: modelling, improved indicators, and integrated assessment for the European Marine Strategy Framework Directive
Creators: name: Borja, Ángel
name: Uyarra, María C.
name: Elliott, Mike
name: Austen, Melanie
name: Heiskanen, Anna-Stiina
name: Uusitalo, Laura
name: Berg, Torsten
name: Lynam, Christopher
name: Wilson, Christian
name: Danovaro, Roberto
name: Cochrane, Sabine
name: Carstensen, Jacob
name: Andersen, Jesper
name: Newton, Alice
name: Mea, Marianna
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. The DEVOTES project (DEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status) is a collaboration of 23 partner and 2 observer organisations and is funded for 4 years (2012- 2016) by the 7th Framework Programme of the European Union. The project focuses on biodiversity assessment for the Marine Strategy Framework Directive (MSFD), but also encompassing food webs and seafloor integrity, on the four regional seas of the EU.
Tuning Dzyaloshinskii-Moriya Interaction in Ferrimagnetic GdCo: A First Principles Approach
Creators: name: Morshed, Md Golam
name: Khoo, Khoong Hong
name: Quessab, Yassine
name: Xu, Jun-Wen
name: Laskowski, Robert
name: Balachandran, Prasanna V.
name: Kent, Andrew D.
name: Ghosh, Avik W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a systematic analysis of our ability to tune chiral Dzyaloshinskii-Moriya Interactions (DMI) in compensated ferrimagnetic Pt/GdCo/Pt1-xWx trilayers by cap layer composition. Using first principles calculations, we show that the DMI increases rapidly for only ~ 10% W and saturates thereafter, in agreement with experiments. The calculated DMI shows a spread in values around the experimental mean, depending on the atomic configuration of the cap layer interface. The saturation is attributed to the vanishing of spin orbit coupling energy at the cap layer and the simultaneous constancy at the bottom interface. Additionally, we predict the DMI in Pt/GdCo/X (X=Ta, W, Ir) and find that W in the cap layer favors a higher DMI than Ta and Ir that can be attributed to the difference in d-band alignment around the Fermi level. Our results open up exciting combinatorial possibilities for controlling the DMI in ferrimagnets towards nucleating and manipulating ultrasmall high-speed skyrmions.
description: 6 pages, 5 figures
title: A monitoring survey for integrated ecosystem assessment regarding shellfish culture
Creators: name: Gangnery, Aline
name: Picoche, Coralie
name: Le Gendre, Romain
name: Legendre, Aurélie
name: Maheux, Frank
name: Mary, Charlotte
name: Parrad, Sophie
name: Simon, Benjamin
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. A monitoring survey was developed to i) understand the functioning of an ecosystem supporting shellfish culture, ii) provide field data allowing the development of an ecosystem model and iii) use this model for ecosystem based management.
FANDANGO: Evolving Language-Based Testing
Creators: name: Zamudio Amaya, José Antonio
name: Zeller, Andreas
name: Smytzek, Marius
Publisher: name: CISPA
Year: 2025

description: Language-based fuzzers leverage formal input specifications (languages) to generate arbitrarily large and diverse sets of valid inputs for a program under test. Modern language-based test generators combine grammars and constraints to satisfy syntactic and semantic input constraints. ISLa, the leading input generator in that space, uses symbolic constraint solving to solve input constraints. Using solvers places ISLa among the most precise fuzzers but also makes it slow.

In this paper, we explore search-based testing as an alternative to symbolic constraint solving. We employ a genetic algorithm that iteratively generates candidate inputs from an input specification, evaluates them against defined constraints, evolving a population of inputs through syntactically valid mutations and retaining those with superior fitness until the semantic input constraints are met. This evolutionary procedure, analogous to natural genetic evolution, leads to progressively improved inputs that cover both semantics and syntax. This change boosts the efficiency of language-based testing: In our experiments, compared to ISLa, our search-based FANDANGO prototype is faster by one to three orders of magnitude without sacrificing precision.

The search-based approach no longer restricts constraints to constraint solvers' (miniature) languages. In FANDANGO, constraints can use the whole Python language and library. This expressiveness gives testers unprecedented flexibility in shaping test inputs. It allows them to state arbitrary goals for test generation: "Please produce 1,000 valid test inputs where the field follows a Gaussian distribution but never exceeds 20 mV."
Qubit measurements with a double-dot detector
Creators: name: Gilad, T.
name: Gurvitz, S. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose to monitor a qubit with a double-dot (DD) resonant-tunneling detector, which can operate at higher temperatures than a single-dot detector. In order to assess the effectiveness of this device, we derive rate equations for the density matrix of the entire system. We show that the signal-to-noise ratio can be greatly improved by a proper choice of the parameters and location of the detector. We demonstrate that quantum interference effects within the DD detector play an important role in the measurement. Surprisingly, these effects produce a systematic measurement error, even when the entire system is in a stationary state.
description: 4 pages, some explanations added, Phys. Rev. Lett., in press
Random walk model applicable to rivers
Creators: name: Vine, Jason
Publisher: name: University of British Columbia
Year: 2009

description: The disposal of waste effluent from industrial and municipal sources into rivers for the purpose of dilution is a common practice. Dilution occurs in the near-field due to specifics of the diffuser design, and in the mid-field due to parameters of the ambient environment. The ability to predict downstream dilution is of interest to regulatory officials and engineers who wish to design such disposal systems. A random walk model has been developed which is geared towards use in rivers. The model only performs mid-field calculations, however the potential exists to accept the results from a near-field model as input. The model attempts to account for the major velocity structures that occur in an open channel, including transverse and vertical shear, secondary currents due to flow through a bend, and turbulent fluctuations. Equations describing such phenomena are obtained from the literature. Laboratory experiments are conducted to verify the validity of some of these equations. As expected from theory, the research confirms that random walk modelling predicts the same results as Fickian diffusion. Arguments are presented as to the choice of a suitable timestep for use with a random walk model. Several key parameters of the random walk are identified, and their effect on the stability and accuracy of the model results are examined. The model is applied to the disposal of effluent from a pulp and paper mill located in Prince George, B.C. Results agree acceptably with a popular diffusion model as well as with digital imagery of the plume. Plots of plume width and dilution are produced for various river flow rates which may be expected at Prince George.
MPEC 2024-T172 : 2024 TP4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TP4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Bayesian Optimized Monte Carlo Planning
Creators: name: Mern, John
name: Yildiz, Anil
name: Sunberg, Zachary
name: Mukerji, Tapan
name: Kochenderfer, Mykel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.8

description: Online solvers for partially observable Markov decision processes have difficulty scaling to problems with large action spaces. Monte Carlo tree search with progressive widening attempts to improve scaling by sampling from the action space to construct a policy search tree. The performance of progressive widening search is dependent upon the action sampling policy, often requiring problem-specific samplers. In this work, we present a general method for efficient action sampling based on Bayesian optimization. The proposed method uses a Gaussian process to model a belief over the action-value function and selects the action that will maximize the expected improvement in the optimal action value. We implement the proposed approach in a new online tree search algorithm called Bayesian Optimized Monte Carlo Planning (BOMCP). Several experiments show that BOMCP is better able to scale to large action space POMDPs than existing state-of-the-art tree search solvers.
description: 8 pages
Superlight small bipolarons: a route to room temperature superconductivity
Creators: name: Alexandrov, A. S.
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: Extending the BCS theory towards the strong electron-phonon interaction (EPI), a charged Bose liquid of small bipolarons has been predicted by us with a further prediction that the highest superconducting critical temperature is found in the crossover region of the EPI strength from the BCS-like to bipolaronic superconductivity. Later on we have shown that the unscreened (infinite-range) Froehlich EPI combined with the strong Coulomb repulsion create \emph{superlight} small bipolarons, which are several orders of magnitude lighter than small bipolarons in the Holstein-Hubbard model (HHM) with a zero-range EPI. The analytical and numerical studies of this Coulomb-Froehlich model (CFM) provide the following recipes for room-temperature superconductivity: (a) The parent compound should be an ionic insulator with light ions to form high-frequency optical phonons, (b) The structure should be quasi two-dimensional to ensure poor screening of high-frequency phonons polarized perpendicular to the conducting planes, (c) A triangular lattice is required in combination with strong, on-site Coulomb repulsion to form the small superlight bipolaron, (d) Moderate carrier densities are required to keep the system of small bipolarons close to the Bose-Einstein condensation regime. Clearly most of these conditions are already met in the cuprates.
description: 17 pages, 5 figures, invited paper to the volume "High Tc Superconductors and Related Transition Metal Oxides", eds. A. Bussmann-Holder and H. Keller (Springer, Berlin, 2007)
Zone-folded longnitude acoustic phonons driving self-trapped state emission in colloidal CdSe nanoplate superlattice
Creators: name: Sui, Xinyu
name: Gao, Xiaoqing
name: Wu, Xianxin
name: Li, Chun
name: Yang, Xuekang
name: Du, Wenna
name: Ding, Zhengping
name: Jin, Shengye
name: Wu, Kaifeng
name: Sum, Tze Chien
name: Gao, Peng
name: Tang, Zhiyong
name: Zhang, Qing
name: Liu, Xinfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Colloidal cadmium chalcogenide nanoplates are two-dimensional semiconductors that have shown great application prospect for light-emitting technologies. Self-trapped state (STS), a special localized state originated from strong electron-phonon coupling (EPC), has great potential in one-step white light luminance owing to its broadband emission linewidth. However, achieving STS in cadmium chalcogenide nanocrystals is extremely challenging due to their intrinic weak EPC nature. By building hybrid superlattice (SL) structures via self-assembly of colloidal CdSe nanoplates (NPLs), we demonstrated an emergence of zone-folded longnitude acoustic phonons (ZFLAP) differ from monodispersed NPLs, and observed a broadband STS emission in spectra range of 450-600 nm. Through femtosecond transient absorption and impulsive vibrational spectroscopy, we revealed that STS is generated in time scale of ~500 fs and is driven by strong coupling of excitons and ZFLAPs with Huang-Rhys parameter as large as ~22.7. Our findings provide a new avenue for generating and manipulating STS emission by artificially designing and building hybrid periodic structures superior to single material optimization.
description: 25 pages, 4 figures
Conductivity of a suspension of nanowires in a weakly conducting medium
Creators: name: Hu, Tao
name: Grosberg, A. Yu.
name: Shklovskii, B. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study macroscopic electrical or thermal conductivity of a composite made of straight or coiled nanowires suspended in poorly conducting medium. We assume that volume fraction of the wires is so large that spaces occupied by them overlap, but there is still enough room to distribute wires isotropically. We found a wealth of scaling regimes at different ratios of conductivities of the wire, $σ_1$ and of the medium, $σ_2$, length of wires, their persistent length and volume fraction. There are large ranges of parameters where macroscopic conductivity is proportional to $(σ_{1}σ_{2})^{1/2}$. These results are directly applicable to the calculation of the macroscopic diffusion constant of the nonspecific DNA-binding proteins in semidilute DNA solution.
description: 9 pages, 5 figures
title: Monitoring to ensure seafood safety of large fish stocks – A baseline study of Atlantic cod (Gadus morhua).
Creators: name: Julshamn, Kaare
name: Nilsen, Bente M.
name: Duinker, Arne
name: Frantzen, Sylvia
name: Valdersnes, Stig
name: Nedreaas, Kjell
name: Maage, Amund
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. This study is one of several baseline studies conducted to provide comprehensive basic information about the content of undesirable substances in important fish species caught in Norwegian waters. More than 2000 Atlantic cod sampled from 83 different positions in the Barents Sea, the North Sea and in coastal areas of Norway, were analyzed for metals and persistent organic pollutants (POPs) in muscle and liver.
title: Comparison of observed and remotely sensed chlorophyll in Icelandic waters
Creators: name: Ágústsdóttir, Kristín
name: Guðmundsson, Kristinn
name: Guðfinnsson, Hafsteinn
name: Marteinsdóttir, Guðrún
Publisher: name: ASC 2013 - Theme session G
Year: 2024
Subjects: Ecosystem observation, processes and dynamics
Pressures, impacts, conservation, and management

description: No abstracts are to be cited without prior reference to the author. The Icelandic shelf area is ranked among the most productive in terms of annual primary production. Nevertheless, phytoplankton growth is highly variable, both spatially and temporally due to factors as vertical winter mixing (Ólafsdóttir 2006), stratification v.s. wind stress, upwelling and cloud cover (Thórdardóttir 1984).
Vital capacity inhalation of sevoflurane with nitrous oxide: comparison with propofol and thiopental infusion adults
Creators: name: Jirawan Bunbanchong
Publisher: name: Faculty of Medicine,Srinakharinwirot University
Year: 1997
Subjects: vital capacity, sevoflurane, propofol, thiopental

description: 2, 4, Journal of Medicine and Health Sciences
K-GRAPE: A Krylov Subspace approach for the efficient control of quantum many-body dynamics
Creators: name: Larocca, Martin
name: Wisniacki, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Gradient Ascent Pulse Engineering (GRAPE) is a celebrated control algorithm with excellent converging rates, owing to a piece-wise-constant ansatz for the control function that allows for cheap objective gradients. However, the computational effort involved in the exact simulation of quantum dynamics quickly becomes a bottleneck limiting the control of large systems. In this paper, we propose a modified version of GRAPE that uses Krylov approximations to deal efficiently with high-dimensional state spaces. Even though the number of parameters required by an arbitrary control task scales linearly with the dimension of the system, we find a constant elementary computational effort (the effort per parameter). Since the elementary effort of GRAPE is super-quadratic, this speed up allows us to reach dimensions far beyond. The performance of the K-GRAPE algorithm is benchmarked in the paradigmatic XXZ spin-chain model.
description: 10 pages, 5 figures
Υπολογισμός των επαγόμενων ρευμάτων στους ανθρώπινους ιστούς με την τεχνική «subcell»:
Creators: name: Γιουνανλής, Παναγιώτης Αριστείδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: επαγόμενα ρεύματα
μέθοδος αντιστάσεων
τεχνική υποκυψελίδας
induced currents
impedance method
subcell technique

description: Στην παρούσα εργασία σκοπός μας είναι να διερευνήσουμε την επίδραση που έχουν οι αγωγοί μεγάλων αγωγιμοτήτων στα επαγόμενα ρεύματα σους ανθρώπινους ιστούς, λόγω έκθεσης σε μαγνητικά και ηλεκτρικά πεδία χαμηλών συχνοτήτων. Για το σκοπό αυτό, αφού γίνει μία γενική παρουσίαση των επιπτώσεων που έχει η έκθεση σε αυτά τα πεδία στην ανθώπινη υγεία και μετέπειτα παρουσιαστούν οι βασικότερες τεχνικές μέθοδοι υπολογισμού των επαγόμενων ρευμάτων, αναπτύσσεται η τεχνική subcell. Η τεχνική subcell αποτελεί μία ειδική περίπτωση της μεθόδου των αντιστάσεων (Impedance Method), όπου χρησιμοποιώντας τους κανόνες του Kirchoff για κάθε υποκυψελίδα, μοντελοποιούμε με τέτοιο τρόπο την προσομοίωση ώστε να καθίσταται δυνατό να βελτιώσουμε το χρόνο και την ακρίβεια των υπολογισμών μας, για μικρότερο υπολογιστικό χώρο.
description: In this work our aim is to investigate the influence of highly conductive wires on the induced currents in human tissues exposed to low frequency magnetic fields. For this purpose, after a general presentation of health effects due to exposure to electro-magnetic fields we present the basic computational techniques and methods used to calculate the induced currents in the human body. Eventually we develop a numerical technique to deal with the problem. This method is based on subcell modeling and is a special case of the Impedance Method, in which, with the use of Kirchoff's rules in each subcell, we improved the simulation to get more accurate results for less computational resources.
TeV J2032+4130: a not-so-dark Accelerator?
Creators: name: Butt, Yousaf M.
name: Combi, Jorge A.
name: Drake, Jeremy
name: Finley, John P.
name: Konopelko, Alexander
name: Lister, Matthew
name: Rodriguez, Jerome
name: Shepherd, Debra
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The HEGRA gamma-ray source TeV J2032+4130 is considered the prototypical 'dark accelerator', since it was the first TeV source detected with no firm counterparts at lower frequencies. The Whipple collaboration observed this source in 2003-5 and the emission hotspot appears displaced about 9 arcminutes to the northeast of the HEGRA position, though given the large positional uncertainties the HEGRA and Whipple positions are consistent. Here we report on Westerbork Synthesis Radio Telescope (WSRT), Very Large Array (VLA), Chandra and INTEGRAL data covering the locations of the Whipple and HEGRA hotspots. We confirm a dual-lobed radio source (also see Marti et al., 2007) coincident with the Whipple hotspot, as well as a weak, partially non-thermal shell-like object, with a location and morphology very similar to the HEGRA source, in our WSRT and mosaicked VLA datasets, respectively. Due to its extended nature, it is likely that the latter structure is a more plausible counterpart of the reported very high energy (VHE) gamma-ray emissions in this region. If so, TeV J2032+4130 may not be a 'dark accelerator' after all. Further observations with the new generation of imaging Cherenkov telescopes are needed to pin down the precise location and morphology of the TeV emission region and thus clear up the confusion over its possible lower frequency counterparts.
description: accepted, MNRAS
title: Sustainable fisheries: broadening criteria for assessment
Creators: name: Hornborg, Sara
name: Nilsson, Per
name: Valentinsson, Daniel
name: Ziegler, Friederike
Publisher: name: ASC 2013 - Theme session H
Year: 2024
Subjects: Fisheries and aquaculture
The sea and human culture and societies

description: No abstracts are to be cited without prior reference to the author. While fishing mortality is approaching sustainable levels in some European fisheries, there is also a need to monitor and follow-up on the broader impacts attributed to implemented or planned management measures
MPEC 2024-T173 : 2024 TQ4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TQ4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
On spike-and-slab priors for Bayesian equation discovery of nonlinear dynamical systems via sparse linear regression
Creators: name: Nayek, Rajdip
name: Fuentes, Ramon
name: Worden, Keith
name: Cross, Elizabeth J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Systems and Control (eess.SY)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents the use of spike-and-slab (SS) priors for discovering governing differential equations of motion of nonlinear structural dynamic systems. The problem of discovering governing equations is cast as that of selecting relevant variables from a predetermined dictionary of basis variables and solved via sparse Bayesian linear regression. The SS priors, which belong to a class of discrete-mixture priors and are known for their strong sparsifying (or shrinkage) properties, are employed to induce sparse solutions and select relevant variables. Three different variants of SS priors are explored for performing Bayesian equation discovery. As the posteriors with SS priors are analytically intractable, a Markov chain Monte Carlo (MCMC)-based Gibbs sampler is employed for drawing posterior samples of the model parameters; the posterior samples are used for variable selection and parameter estimation in equation discovery. The proposed algorithm has been applied to four systems of engineering interest, which include a baseline linear system, and systems with cubic stiffness, quadratic viscous damping, and Coulomb damping. The results demonstrate the effectiveness of the SS priors in identifying the presence and type of nonlinearity in the system. Additionally, comparisons with the Relevance Vector Machine (RVM) - that uses a Student's-t prior - indicate that the SS priors can achieve better model selection consistency, reduce false discoveries, and derive models that have superior predictive accuracy. Finally, the Silverbox experimental benchmark is used to validate the proposed methodology.
Classical Correlation in Quantum Dialogue
Creators: name: Tan, Yong-gang
name: Cai, Qing-yu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Classical communications are used in the post-processing procedure of quantum key distribution. Since the security of quantum key distribution is based on the principles of quantum mechanics, intuitively the secret key can only be derived from the quantum states. We find that classical communications are incorrectly used in the so-called quantum dialogue type protocols. In these protocols, public communications are used to transmit secret messages. Our calculations show that half of Alice's and Bob's secret message is leaked through classical channel. By applying Holevo bound, we can see that the quantum efficiency claimed in the quantum dialogue type of protocols is not achievable.
description: Here we point out the erroneous use of classical communication results in the insecurity of quantum dialogue protocols. Int. J. Quant. Inf. (In press)