cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparison of the Stellar Populations of Bulges and Discs using the MaNGA Survey
Creators: name: Lah, Philip
name: Scott, Nicholas
name: Barone, Tania M.
name: Robotham, A. S. G.
name: D'Eugenio, Francesco
name: Colless, Matthew
name: Casura, Sarah
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the MaNGA integral-field spectroscopic survey of low-redshift galaxies to compare the stellar populations of the bulge and disc components, identified from their Sersic profiles, for various samples of galaxies. Bulge dominated regions tend to be more metal-rich and have slightly older stellar ages than their associated disc dominated regions. The metallicity difference is consistent with the deeper gravitational potential in bulges relative to discs, which allows bulges to retain more of the metals produced by stars. The age difference is due to star formation persisting longer in discs relative to bulges. Relative to galaxies with lower stellar masses, galaxies with higher stellar masses tend to have bulge dominated regions that are more metal-rich and older (in light-weighted measurements) than their disc dominated regions. This suggests high-mass galaxies quench from the inside out, while lower-mass galaxies quench across the whole galaxy simultaneously. Early-type galaxies tend to have bulge dominated regions the same age as their disc dominated regions, while late-type galaxies tend to have disc dominated regions significantly younger than their bulge dominated regions. Central galaxies tend to have a greater metallicity difference between their bulge dominated regions and disc dominated regions than satellite galaxies at similar stellar mass. This difference may be explained by central galaxies being subject to mergers or extended gas accretion bringing new, lower-metallicity gas to the disc, thereby reducing the average metallicity and age of the stars; quenching of satellite discs may also play a role.
description: Accepted by PASA
title: Ψυχολογικά οφέλη και ανασταλτικοί παράγοντες στη συμμετοχή στην υπαίθρια δραστηριότητα αναψυχής της χιονοδρομίας
titleType: AlternativeTitle
Creators: name: Νάκης, Νικόλαος
Publisher: name: University of Thessaly
Year: 2008
Subjects: subject: ΣΚΙ -- ΨΥΧΟΛΟΓΙΚΕΣ ΑΠΟΨΕΙΣ
subject: ΣΚΙ -- ΕΡΕΥΝΑ

description: Ο σύγχρονος τρόπος ζωής με τους εξοντωτικούς ρυθμούς καθώς και το υποβαθμισμένο περιβάλλον των σύγχρονων πόλεων καθιστά τη συμμετοχή σε υπαίθριες δραστηριότητες άκρως απαραίτητη. Η συμμετοχή σε υπαίθριες δραστηριότητες συνδέεται με μια σειρά συναισθημάτων, όπως η ευχαρίστηση, η επίτευξη, η ικανοποίηση τα οποία ενδυναμώνουν και προστατεύουν την ψυχική υγεία των ατόμων. Εντούτοις υπάρχουν πολλοί τύποι εμποδίων που μπορούν να επηρεάσουν τη συμμετοχή σε δραστηριότητες αναψυχής. Σκοπός της έρευνας ήταν να διαπιστώσει τα ψυχολογικά οφέλη που αποκομίζονται από τη συμμετοχή στην υπαίθρια δραστηριότητα αναψυχής του σκι και να τα καθορίσει. Επιπλέον να καθορίσει κατά πόσο κάποιοι συγκεκριμένοι ανασταλτικοί παράγοντες επηρεάζουν την δυνατότητα συμμετοχής στο σκι. Το δείγμα αποτέλεσαν 143 άνδρες και γυναίκες χιονοδρόμοι σε 3 χιονοδρομικά κέντρα (Καλάβρυτα, Παρνασσός, Μέτσοβο).Για τους σκοπούς της έρευνας χρησιμοποιήθηκε ερωτηματολόγιο, το οποίο προέκυψε από τη χρήση: 1) του ερωτηματολογίου «Κλίμακα μέτρησης ανασταλτικών παραγόντων συμμετοχής στην χιονοδρομία αναψυχής Constraints toward ski recreational participation.» των Κουθούρη X., Αλεξανδρή Κ. και Γιοβάνη X., και 2) του ερωτηματολογίου «Ελληνική έκδοση ερωτηματολογίου εσωτερικών κινήτρων Intrinsic Motivation Inventory - Greek (IMI)» των Παπαχαρίση και Γούδα. Από την ανάλυση διακύμανσης που εφαρμόστηκε δεν παρουσιάστηκαν στατιστικά σημαντικές διαφορές όσον αφορά τα χιονοδρομικά κέντρα. Όσον αφορά τους παράγοντες των δύο ερωτηματολογίων με τα δημογραφικά χαρακτηριστικά εμφανίστηκαν σημαντικές διαφορές στην ηλικία, στο επίπεδο εκπαίδευσης και στην αλληλεπίδραση της ηλικίας και του φύλου. Αντίθετα δεν εμφανίστηκαν διαφορές στο φύλο και την οικογενειακή κατάσταση. Επομένως περισσότερη ενημέρωση και ευαισθητοποίηση των υπευθύνων των χιονοδρομικών κέντρων μπορεί να συμβάλλει στην δημιουργία καλύτερων προγραμμάτων.
Agnostic Learning for Packing Machine Stoppage Prediction in Smart Factories
Creators: name: Filios, Gabriel
name: Katsidimas, Ioannis
name: Nikoletseas, Sotiris
name: Panagiotou, Stefanos H.
name: Raptis, Theofanis P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The cyber-physical convergence is opening up new business opportunities for industrial operators. The need for deep integration of the cyber and the physical worlds establishes a rich business agenda towards consolidating new system and network engineering approaches. This revolution would not be possible without the rich and heterogeneous sources of data, as well as the ability of their intelligent exploitation, mainly due to the fact that data will serve as a fundamental resource to promote Industry 4.0. One of the most fruitful research and practice areas emerging from this data-rich, cyber-physical, smart factory environment is the data-driven process monitoring field, which applies machine learning methodologies to enable predictive maintenance applications. In this paper, we examine popular time series forecasting techniques as well as supervised machine learning algorithms in the applied context of Industry 4.0, by transforming and preprocessing the historical industrial dataset of a packing machine's operational state recordings (real data coming from the production line of a manufacturing plant from the food and beverage domain). In our methodology, we use only a single signal concerning the machine's operational status to make our predictions, without considering other operational variables or fault and warning signals, hence its characterization as ``agnostic''. In this respect, the results demonstrate that the adopted methods achieve a quite promising performance on three targeted use cases.
Autonomous dynamic decision making in fuel cycle simulators using a game theoretic approach
Creators: name: Phathanapirom, Urairisa Birdy
name: 0000-0002-8992-4917
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Nuclear fuel cycle
Systems analysis
Sequential decision making under uncertainty
Game theory

description: A novel methodology for optimizing nuclear fuel cycle transitions that captures interactions between a policy maker and electric utility company is presented. The methodology is demonstrated using a two-person general-sum sequential game with uncertainty that is implemented using a nuclear fuel cycle simulator capable of calculating a material- and technology-constrained material balance, coupled to a multi-objective optimization solver. The solver explicitly treats uncertainties using a stochastic programming approach with chance nodes depicted as a Nature player who moves randomly. The methodology is demonstrated through a Transition Game that features tradeoffs between investments in competing reprocessing and waste disposal technologies, dynamic reactor deployment responses to resolutions in reactor capital cost uncertainty, and the influence of capital subsidies on the future nuclear technology mix. Each player in the game uses a unique set of decision criteria to identify optimal near-term hedging strategies that consider all of Nature’s possible moves as well as the other player’s available decisions. These hedging strategies balance the exchange between the risk of immediate action and delay and maintain flexibility to allow for intelligent recourse decisions once uncertainties are resolved. Results from the Transition Game indicate that early transition to high-temperature gas-cooled reactors is preferred, with the option to abandon the transition following a learning period if capital costs are unfavorable. Under these conditions, transition to used fuel recycling in sodium-cooled fast reactors may be spurred by policy incentives under some certain decision criteria weightings. Otherwise, operating with a baseline set of decision criteria weightings, transition to a closed fuel is never observed when players hedge optimally against Nature’s moves. It is only when players have perfect information regarding Nature’s future moves will transition to a closed fuel be observed.
title: Η επίδραση της προπόνησης ταχυδύναμης με βάρη σε παραμέτρους της φυσικής κατάστασης και της τεχνικής κατάρτισης σε καλαθοσφαιριστές ηλικίας 14-16 ετών
titleType: AlternativeTitle
Creators: name: Αργυρού, Μάριος
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΚΑΛΑΘΟΣΦΑΙΡΙΣΗ, ΕΦΗΒΙΚΗ -- ΠΡΟΠΟΝΗΣΗ
subject: ΠΡΟΠΟΝΗΣΗ ΜΕ ΒΑΡΗ

description: Παρατηρήσεις έκδοσης: λείπουν οι σελίδες 7, 43-47 από το φυσικό τεκμήριο.
description: Σκοπός της παρούσας έρευνας είναι η εξέταση της επίδρασης της προπόνησης ισχύος, συμπληρωματικοί με την προπόνηση καλαθοσφαίρισης, σε παραμέτρους της φυσικής κατάστασης και της τεχνικής καλαθοσφαιριστών ηλικίας 14-16 χρονών. Στη μελέτη συμμετείχαν 30 έφηβοι καλαθοσφαιριστές, χωρίς προηγούμενη εμπειρία στη προπόνηση με βάρη. Οι δοκιμαζόμενοι χωρίσθηκαν σε 3 ομάδες: ομάδα βάρη/καλαθοσφαίριση (ΟΚΒ, η=10), ομάδα καλαθοσφαίρισης (OK, π=10) και ομάδα ελέγχου (ΟΕ, π=10). Η ομάδα ΟΚΒ ακολούθησε ένα πρόγραμμα με βάρη διάρκειας 8 εβδομάδων, επιπρόσθετα της προπόνησης καλαθοσφαίρισης. Και οι τρεις ομάδες αξιολογήθηκαν, στην αρχή στο μέσο και στο τέλος του προγράμματος, στα ανθρωπομετρικά χαρακτηριστικά, στη σύσταση σώματος, στην αξιολόγηση της τεχνικής με μπάλα και στις φυσικές ικανότητες (ευκινησία, ευκαμψία, ταχύτητα, μέγιστη δύναμη, αναερόβια ικανότητα, αλτική ικανότητα και ταχυδύναμη). Η συχνότητα των προπονήσεων ήταν 2 φορές τη βδομάδα με ένταση 50% και 6 επαναλήψεις, με περιοδικότητα της ποσότητας, για τον πρώτο μήνα. Το δεύτερο μήνα η ένταση αυξήθηκε στο 60% και 6 επαναλήψεις, με περιοδικότητα της ποσότητας αντίστοιχα. Οι δευτερεύοντες ασκήσεις εκτελούνταν με ένταση 75% καθ’ όλη τη διάρκεια του προγράμματος στις 10-12 επαναλήψεις. Μετά από την άσκηση πιέσεις ποδιών, ο δοκιμαζόμενος έκανε και 6 κάθετα άλματα με το βάρος του σώματος. Από τα αποτελέσματα προκύπτει ότι η ενασχόληση των εφήβων με την καλαθοσφαίριση επιφέρει σημαντικές αλλαγές, στο άλμα από ημικάθισμα (ρ<0,05), στην ευκινησία (ρ<0,05), στην ταχύτητα (ρ<0,05) και στην τεχνική κατάρτιση με μπάλα (ρ<0,05). Η προσθήκη ενός προγράμματος ταχυδύναμης με βάρη με συχνότητα 2 φορές τη βδομάδα, βελτιώνει σημαντικά (ρ<0,05) την αλτική ικανότητα, τη μέγιστη δύναμη άνω και κάτω άκρων, την ευκινησία, την ταχύτητα και την τεχνική.
Mist and Edge Computing Cyber-Physical Human-Centered Systems for Industry 5.0: A Cost-Effective IoT Thermal Imaging Safety System
Creators: name: Fraga-Lamas, P.
name: Barros, D.
name: Lopes, S. I.
name: Fernández-Caramés, T. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: While many companies worldwide are still striving to adjust to Industry 4.0 principles, the transition to Industry 5.0 is already underway. Under such a paradigm, Cyber-Physical Human-centered Systems (CPHSs) have emerged to leverage operator capabilities in order to meet the goals of complex manufacturing systems towards human-centricity, resilience and sustainability. This article first describes the essential concepts for the development of Industry 5.0 CPHSs and then analyzes the latest CPHSs, identifying their main design requirements and key implementation components. Moreover, the major challenges for the development of such CPHSs are outlined. Next, to illustrate the previously described concepts, a real-world Industry 5.0 CPHS is presented. Such a CPHS enables increased operator safety and operation tracking in manufacturing processes that rely on collaborative robots and heavy machinery. Specifically, the proposed use case consists of a workshop where a smarter use of resources is required, and human proximity detection determines when machinery should be working or not in order to avoid incidents or accidents involving such machinery. The proposed CPHS makes use of a hybrid edge computing architecture with smart mist computing nodes that processes thermal images and reacts to prevent industrial safety issues. The performed experiments show that, in the selected real-world scenario, the developed CPHS algorithms are able to detect human presence with low-power devices (with a Raspberry Pi 3B) in a fast and accurate way (in less than 10 ms with a 97.04% accuracy), thus being an effective solution that can be integrated into many Industry 5.0 applications. Finally, this article provides specific guidelines that will help future developers and managers to overcome the challenges that will arise when deploying the next generation of CPHSs for smart and sustainable manufacturing.
description: 32 pages
title: Η επίδραση της θεραπευτικής άσκησης στη λειτουργική ικανότητα και στους βιοχημικούς και ανοσολογικούς δείκτες του ορού του αίματος ασθενών με οστεοαρθρίτιδα του γόνατος
titleType: AlternativeTitle
Creators: name: Καραγιαννίδης, Αλέξανδρος
Publisher: name: University of Thessaly
Year: 2006
Subjects: subject: ΑΣΚΗΣΗ -- ΦΥΣΙΟΛΟΓΙΑ
subject: ΟΣΤΕΟΑΡΘΡΙΤΙΔΑ

description: Η οστεοαρθρίτιδα του γόνατος αποτελεί συχνή αιτία πόνου και σωματικής ανικανότητας και η άσκηση αποτελεί μια από τις κυριότερες μη φαρμακευτικές μεθόδους για την αντιμετώπισή των συμπτωμάτων που προκαλεί. Οι μεταλλοπρωτεϊνάσες είναι ένζυμα τα οποία προκαλούν καταστροφή των συστατικών του αρθρικού χόνδρου και η ανίχνευσή τους στον ορό του αίματος δίνει πληροφορίες για τη μεταβολική του δραστηριότητα. Σκοπός της εργασίας ήταν η μελέτη της επίδρασης της άσκησης στην αίσθηση πόνου, τη δυσκαμψία και τη λειτουργική ικανότητα ασθενών με οστεοαρθρίτιδα (ΟΑ) του γόνατος, καθώς και στα επίπεδα των μεταλλοπροπεϊνασών (MMPs) ProMMP-1, ΜΜΡ-3 και ΜΜΡ-8 στον ορό του αίματος. Μελετήθηκαν συνολικά 24 γυναίκες με ΟΑ του γόνατος και μέσο όρο ηλικίας 62,1 ±8,2 έτη ηλικίας, που ταξινομήθηκαν σε 3 ομάδες: αρχόμενη ΟΑ, προχωρημένη ΟΑ και ομάδα ελέγχου. Οι ασθενείς των δυο πρώτων ομάδων συμμετείχαν σε ένα πρόγραμμα άσκησης διάρκειας 6 εβδομάδων. Όλοι οι ασθενείς αξιολογήθηκαν με βάση την κλίμακα WOMAC. Τα επίπεδα της έκφρασης των MMPs μετρήθηκαν στον ορό του αίματος με την ανοσοενζυμική δοκιμασία ELISA διπλού αντισώματος. Όλες οι μετρήσεις πραγματοποιήθηκαν στην έναρξη και στο τέλος του προγράμματος άσκησης. Στατιστικά σημαντική βελτίωση στην κλίμακα WOMAC παρατηρήθηκε μόνο στην ομάδα της αρχόμενης ΟΑ, με βελτίωση αυτής κατά 28% (Ρ<0,05). Ακόμη, στατιστικά σημαντική αύξηση παρατηρήθηκε μόνο στην ProMMP-1 κατά 3% (Ρ<0,05) στην ομάδα της αρχόμενης ΟΑ. Συμπεραίνουμε ότι η θεραπευτική άσκηση ωφελεί κυρίως στα αρχικά στάδια της πάθησης, χωρίς να επιδρά στην κατάσταση του αρθρικού χόνδρου, αφού δεν επηρεάζει τα επίπεδα των μεταλλοπρωτεϊνασών ProMMP-Ι, ΜΜΡ-3 και ΜΜΡ-8 στον ορό του αίματος.
Energy and water production trends in the Powder River Basin
Creators: name: Pfeil, Audrey
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Coalbed methane
Produced water
Hydraulic fracturing
Powder River Basin

description: Energy extraction and water are intrinsically linked. Quantifying this relationship is critical to develop effective management strategies that minimize adverse environmental impacts and potentially reduce production costs. The objective of this study was to assess the spatiotemporal variability in water use and water production through hydrocarbon extraction from conventional and unconventional reservoirs using data from the Powder River Basin in Wyoming as a case study. Field level and detailed well-by-well analyses were conducted to quantify the spatiotemporal variability of oil and gas volumes and the corresponding co-produced water from conventional oil reservoirs and coal bed methane (CBM) reservoirs, and additional water used for hydraulic fracturing in unconventional shale reservoirs. Results show that conventional oil and CBM gas production has markedly declined along with produced water. The water demands of unconventional oil and gas development in the last decade have increased with increasing unconventional oil production, however water use per unit of energy produced has increased. Produced water from unconventional oil wells does not meet hydraulic fracturing water demands. CBM wells in proximity to new unconventional well development may be a source of water needing minimal treatment for growing hydraulic fracturing water demands.
Handling Flash-Crowd Events to Improve the Performance of Web Applications
Creators: name: Junior, Ubiratam de Paula
name: Drummond, Lúcia M. A.
name: de Oliveira, Daniel
name: Frota, Yuri
name: Barbosa, Valmir C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Cloud computing can offer a set of computing resources according to users' demand. It is suitable to be used to handle flash-crowd events in Web applications due to its elasticity and on-demand characteristics. Thus, when Web applications need more computing or storage capacity, they just instantiate new resources. However, providers have to estimate the amount of resources to instantiate to handle with the flash-crowd event. This estimation is far from trivial since each cloud environment provides several kinds of heterogeneous resources, each one with its own characteristics such as bandwidth, CPU, memory and financial cost. In this paper, the Flash Crowd Handling Problem (FCHP) is precisely defined and formulated as an integer programming problem. A new algorithm for handling with a flash crowd named FCHP-ILS is also proposed. With FCHP-ILS the Web applications can replicate contents in the already instantiated resources and define the types and amount of resources to instantiate in the cloud during a flash crowd. Our approach is evaluated considering real flash crowd traces obtained from the related literature. We also present a case study, based on a synthetic dataset representing flash-crowd events in small scenarios aiming at the comparison of the proposed approach against Amazon's Auto-Scale mechanism.
description: Submitted to the 30th Symposium On Applied Computing (2015)
Ultrasensitive Measurement of Angular Rotations via Hermite-Gaussian Pointer
Creators: name: Xia, Binke
name: Huang, Jingzheng
name: Li, Hongjing
name: Liu, Miaomiao
name: Xiao, Tailong
name: Fang, Chen
name: Zeng, Guihua
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Exploring high sensitivity on the measurement of angular rotations is an outstanding challenge in optics and metrology. In this work, we employ the mn-order Hermite-Gaussian beam in the weak measurement scheme with an angular rotation interaction, where the rotation information is taken by another HG mode state completely after the post-selection. By taking a projective measurement on the final light beam, the precision of angular rotation is improved by a factor of 2mn+m+n. For verification, we perform an optical experiment where the minimum detectable angular rotation improves $\sqrt{15}$-fold with HG55 mode over that of HG11 mode, and achieves a sub-microradian scale of the measurement precision. Our theoretical framework and experimental results not only provide a more practical and convenient scheme for ultrasensitive measurement of angular rotations, but also contribute to a wide range of applications in quantum metrology.
description: 21 pages, 8 figures, 3 tables. Published in Photonics Research
Elastic Properties of Chemical-Vapor-Deposited Monolayer MoS2, WS2, and Their Bilayer Heterostructures
Creators: name: Liu, Kai
name: Yan, Qimin
name: Chen, Michelle
name: Fan, Wen
name: Sun, Yinghui
name: Suh, Joonki
name: Fu, Deyi
name: Lee, Sangwook
name: Zhou, Jian
name: Tongay, Sefaattin
name: Ji, Jie
name: Neaton, Jeffrey B.
name: Wu, Junqiao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Elastic properties of materials are an important factor in their integration in applications. Chemical vapor deposited (CVD) monolayer semiconductors are proposed as key components in industrial-scale flexible devices and building blocks of 2D van der Waals heterostructures. However, their mechanical and elastic properties have not been fully characterized. Here we report high 2D elastic moduli of CVD monolayer MoS2 and WS2 (~ 170 N/m), which is very close to the value of exfoliated MoS2 monolayers and almost half the value of the strongest material, graphene. The 2D moduli of their bilayer heterostructures are lower than the sum of 2D modulus of each layer, but comparable to the corresponding bilayer homostructure, implying similar interactions between the hetero monolayers as between homo monolayers. These results not only provide deep insight to understanding interlayer interactions in 2D van der Waals structures, but also potentially allow engineering of their elastic properties as desired.
Quantum gates with weak van der Waals interactions of neutral Rydberg atoms
Creators: name: Shi, Xiao-Feng
name: Lu, Yan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Neutral atoms are promising for large-scale quantum computing, but accurate neutral-atom entanglement depends on large Rydberg interactions which strongly limit the interatomic distances. Via a phase accumulation in detuned Rabi cycles enabled by a Rydberg interaction of similar magnitude to the Rydberg Rabi frequency, we study a controlled-phase gate with an arbitrary phase and extend it to the controlled-NOT gate. The gates need only three steps for coupling one Rydberg state, depend on easily accessible van der Waals interaction that naturally arises between distant atoms, and have no rotation error in the weak interaction regime. Importantly, they can work with very weak interactions so that well-separated qubits can be entangled. The gates are sensitive to the irremovable fluctuation of Rydberg interactions, but can still have a fidelity over 98\% with realistic position fluctuation of qubits separated over 20~$μ$m.
description: 7 pages, 3 figures
Temnothorax subditivus
Creators: name: Prebus, Matthew M.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Temnothorax
Temnothorax subditivus

description:  subditivus group This group is composed of two species, Temnothorax politus and T. subditivus, which together have a vast range spanning all elevations, from the southern United States to northern South America (Fig. 165). Typically found nesting in dead vegetation, under bark, or in the leaf litter, the finer details of the biology of this group remain unknown. All nest collections so far have been monogynous. The morphology of T. subditivus is extremely variable across its range and may prove to be a species complex with additional sampling and further investigation. As a species group, T. politus is easy to distinguish from other Nearctic Temnothorax, but the morphological characteristics and range of T. subditivus overlap broadly with the pulchellus group, the pastinifer group, and members of the sallei clade with characters of the Macromischa syndrome. The keys above and the ‘similar species’ sections below should be used to distinguish it from lookalikes.
description: Published as part of Prebus, Matthew M., 2021, Taxonomic revision of the Temnothorax salvini clade (Hymenoptera: Formicidae), with a key to the clades of New World Temnothorax, pp. 1-462 in PeerJ (e 11514) (e 11514) 9 on page 421, DOI: 10.7717/peerj.11514, http://zenodo.org/record/5102026
title: Tinkertoy theories for E₇ and E₈
title: Tinkertoy theories for E7 and E8
titleType: AlternativeTitle
Creators: name: Zhu, Yinan
name: 0000-0002-2085-1916
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Conformal field theory
Supersymmetry

description: We construct the 4D N = 2 super conformal field theories (SCFT) of class-S of type E₇ and E₈. These are four-dimensional N = 2 SCFT arising from the compactification of the E₇ and E₈ (2, 0) theory on a punctured Riemann surface, C. The classification is given by listing all 3-punctured spheres (“fixtures”), and connecting cylinders, which can arise in a pants-decomposition of C. There are 11,000 and 49,836 isolated SCFTs which arise as 3-punctured spheres in E₇ and E₈ respectively. We analyse the Coloumb branch geometry of these theories by studying pole structure of corresponding Seiberg-Witten solution. We discover possible enhanced flavour symmetry and free hypermultiplets by computing the Hall-Littlewood (H-L) index. We propose a new method which allows one to identify which group representation would contribute to the H-L index up to a given order using simple arithmetic, making the computation much more tractable. From the classification results, we discovered various alternative realizations of known 4d SCFT in class-S, including Minahan-Nemeschansky theories and the conformal matter theories, which are 6d (1, 0) SCFTs compactified on T² . We also discovered a few SCFT with several copies of E₈ as global symmetry, and we conjecture them to be product theories.
Internal and external dynamics in language: Evidence from verb regularity in a historical corpus of English
Creators: name: Cuskley, Christine F.
name: Pugliese, Martina
name: Castellano, Claudio
name: Colaiori, Francesca
name: Loreto, Vittorio
name: Tria, Francesca
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computation and Language (cs.CL)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Human languages are rule governed, but almost invariably these rules have exceptions in the form of irregularities. Since rules in language are efficient and productive, the persistence of irregularity is an anomaly. How does irregularity linger in the face of internal (endogenous) and external (exogenous) pressures to conform to a rule? Here we address this problem by taking a detailed look at simple past tense verbs in the Corpus of Historical American English. The data show that the language is open, with many new verbs entering. At the same time, existing verbs might tend to regularize or irregularize as a consequence of internal dynamics, but overall, the amount of irregularity sustained by the language stays roughly constant over time. Despite continuous vocabulary growth, and presumably, an attendant increase in expressive power, there is no corresponding growth in irregularity. We analyze the set of irregulars, showing they may adhere to a set of minority rules, allowing for increased stability of irregularity over time. These findings contribute to the debate on how language systems become rule governed, and how and why they sustain exceptions to rules, providing insight into the interplay between the emergence and maintenance of rules and exceptions in language.
description: 12 page, 4 figures + Supporting Information (18 pages)
title: Journal of Additive Manufacturing Technologies, Vol. 2 No. 2 (2022): J AM Tech
title: J AM Tech
titleType: AlternativeTitle
Creators: name: Journal Of Additive Manufacturing Technologies
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2023

description: Laser weldability of laser powder bed fused AlSi7Mg0.6...702 Post-processing of surface topography data for as-built metal additive surface texture characterization...697 Energy Density Determination for L-PBFP of Ti-6Al-4V Alloy for Various Beam Diameters and Hatch Distances ...695 A numerical and experimental investigation on buckling behavior of additively manufactured ribbed casings...694 Surface treatment effects on chemical milling performance of L-PBF produced Ti6Al4V ELI...677 Surface roughness assessment of post-process effects on L-PBF alloy 718...690 Characterization of metal powder reused multiple times for laser powder bed fusion ...688 Coordination of spatial and temporal laser beam profile towards ultra-fine feature fabrication in laser powder bed fusion...687 Contact-free support structures effect on dimensional deviation of LPBF printed components with overhang features...686 Defect detection with image processing and deep learning in polymer powder bed additive manufacturing systems ...684 On the mechanical behavior and microstructural characterization of wire + arc additive manufacturing of Mn-Si based steel alloy (ER70S-6)...648
Slip-enhanced Rayleigh-Plateau instability of a liquid film on a fibre
Creators: name: Zhao, Chengxi
name: Zhang, Yixin
name: Si, Ting
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Boundary conditions at a liquid-solid interface are crucial to dynamics of a liquid film coated on a fibre. Here a theoretical framework based on axisymmetric Stokes equations is developed to explore the influence of liquid-solid slip on the Rayleigh-Plateau instability of a cylindrical film on a fibre. The new model not only shows that the slip-enhanced growth rate of perturbations is overestimated by the classical lubrication model, but also indicates a slip-dependent dominant wavelength, instead of a constant value obtained by the lubrication method, which leads to larger drops formed on a more slippery fibre. The theoretical findings are validated by direct numerical simulations of Navier-Stokes equations via a volume-of-fluid method. Additionally, the slip-dependent dominant wavelengths predicted by our model agree with the experimental results provided by Haefner. et al.[Nat. Commun., Vol. 6(1), 2015, 18 pp. 1-6].
RATAN-600 multi-frequency data for the BL Lac objects
Creators: name: Mingaliev, M. G.
name: Sotnikova, Yu. V.
name: Udovitskiy, R. Yu.
name: Mufakharov, T. V.
name: Nieppola, E.
name: Erkenov, A. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a new catalogue of the RATAN-600 multi-frequency measurements for BL Lac objects. The purpose of this catalogue is to compile the BL Lac multi-frequency data that is acquired with the RATAN-600 simultaneously at several frequencies. The BL Lac objects emit a strongly variable and polarized non-thermal radiation across the entire electromagnetic spectrum from radio to gamma-rays and represent about one percent of known AGNs. They belong to the blazar population and differ from other blazars featureless optical spectrum, which sometimes have absorption lines, or have weak and narrow emission lines. One of the most effective ways of studying the physics of BL Lacs is the use of simultaneous multi-frequency data. The multi-frequency broadband radio spectrum was obtained simultaneously with an accuracy of up to 1-2 minutes for four to six frequencies: 1.1, 2.3, 4.8, 7.7, 11.2, and 21.7 GHz. The catalogue is based on the RATAN-600 observations and on the data from: equatorial coordinate and redshift, R-band magnitude, synchrotron peak frequency, SED classes and object type, literature. The present version of the catalogue contains RATAN-600 flux densities measurements over nine years (2006-2014), radio spectra at different epochs, and their parameters for more than 300 BL Lacs objects and candidates. The BL Lacs list is constantly updated with new observational data of RATAN-600.
Expertise in the unemployment industry
Creators: name: Sheehan, Patrick Ignacio Thomas
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Expertise
Work
Unemployment
White-collar

description: Over the last forty years, US employment has become increasingly precarious and unemployment has become an increasingly common experience for many workers. This thesis examines how white-collar unemployment is organized during this era of precarious employment. It conceptualizes and takes as its object of inquiry what I call the “unemployment industry:” the network of actors, organizations, discourses and technologies that provide services and guidance to unemployed professional workers as they search for a job. I use three local “job clubs” for unemployed workers in Austin, Texas as windows into examining this industry. This thesis asks how expertise is constructed within the unemployment industry. It begins with a puzzling observation: Many of the unemployment experts that give presentations at the job clubs are themselves out of work. How is it that someone who themselves cannot find a employment can become an expert in coaching others to find employment? From this initial puzzle, I explore broader questions about knowledge and political economy: What is unemployment expertise? What can the dynamics of expertise in the unemployment industry tell us about the political economy of work today? To answer these questions, I draw on eight months of participant observation in the three job clubs and seventeen interviews with unemployment experts. I use two theories of the social construction of expertise in the analysis, Andrew Abbott’s (1988) theory of professions and Gil Eyal’s (2013) theory of expertise-as-assemblage. I identify and analyze three ideal-type unemployment experts - Job Coaches, Self-help Gurus, and Skill-certifiers - based on their distinct diagnoses and solutions for the problem of unemployment. I ultimately find, however, that unemployment expertise is not something that an expert has but something that they access by tapping into a particular network of organizations, discourses, and technologies. The result is a sort of expertise without experts. In the conclusion, I discuss the implications of these findings for social science understandings of expertise and work and unemployment in the new economy.
CAT: Learning to Collaborate Channel and Spatial Attention from Multi-Information Fusion
Creators: name: Wu, Zizhang
name: Wang, Man
name: Sun, Weiwei
name: Li, Yuchen
name: Xu, Tianhao
name: Wang, Fan
name: Huang, Keke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Channel and spatial attention mechanism has proven to provide an evident performance boost of deep convolution neural networks (CNNs). Most existing methods focus on one or run them parallel (series), neglecting the collaboration between the two attentions. In order to better establish the feature interaction between the two types of attention, we propose a plug-and-play attention module, which we term "CAT"-activating the Collaboration between spatial and channel Attentions based on learned Traits. Specifically, we represent traits as trainable coefficients (i.e., colla-factors) to adaptively combine contributions of different attention modules to fit different image hierarchies and tasks better. Moreover, we propose the global entropy pooling (GEP) apart from global average pooling (GAP) and global maximum pooling (GMP) operators, an effective component in suppressing noise signals by measuring the information disorder of feature maps. We introduce a three-way pooling operation into attention modules and apply the adaptive mechanism to fuse their outcomes. Extensive experiments on MS COCO, Pascal-VOC, Cifar-100, and ImageNet show that our CAT outperforms existing state-of-the-art attention mechanisms in object detection, instance segmentation, and image classification. The model and code will be released soon.
description: 8 pages, 5 figures
Predictive use of matched and mismatched gender-marked articles in Spanish-English bilinguals
Creators: name: Baron, Alisa
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Bilingualism
Gender processing
Language processing
Eye-tracking

description: Most behavioral research involving typically-developing children has been devoted to understanding language production processes, but there is limited information on language comprehension; thus, part of the developmental picture is incomplete. Although there is a growing body of literature focusing on production of grammatical forms for bilingual children, there is a critical need to understand how children’s comprehension skills develop in conjunction with production skills by understanding their language knowledge and language experience. With regard to grammatical class, articles are especially important because they precede nouns in most contexts in Spanish and therefore are used with a high frequency in all aspects of language. Articles should be studied in the language processing of elementary age children to understand what children attend to during language comprehension. In this study, the visual world paradigm was used to examine gendered articles using phonological competitors in trials with informative (different-gender grammatical trials), uninformative (same-gender grammatical trials), or incorrect (ungrammatical trials) articles in bilingual children and adults. Participants named common nouns and completed an eye-tracking task, a grammaticality judgment task, and a standardized vocabulary test in both English and Spanish. Bilingual children ages 5-6 and 8-9 did not show gender sensitivity in informative vs. uninformative trials but were significantly slower on ungrammatical trials. Bilingual adults showed sensitivity to gender and were significantly faster on informative trials relative to uninformative trials, which in turn were significantly faster than ungrammatical trials regardless of participants’ profile of current Spanish language input. Children may be merging their representation of articles in the two languages and not find the gender cue in Spanish to be necessary. Spanish, a gendered language and English, a non-gendered language, may be in competition during this developmental period. Bilingual adults are able to quickly and accurately process the incoming gendered information, and are therefore able to demonstrate gender sensitivity.
title: Journal of Additive Manufacturing Technologies, Vol. 2 No. 1 (2022): J AM Tech
title: J AM Tech
titleType: AlternativeTitle
Creators: name: Journal Of Additive Manufacturing Technologies
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2023

description: Electromagnetic Characterization of 3D printed Metamaterial Absorber with Conductive Paint...706 Peridynamic investigation of surface cracks in optimality criterion-based topology optimization for additive manufacturing ...705 Combination of peridynamics and genetic algorithm based topology optimization methods for AM-friendly designs...704 Effects of design parameters on surface roughness of additively manufactured thin-walled structures...692 Functionally graded ceramics by lithography-based ceramic manufacturing (LCM)...678 Heat pipe embedded cold plate design with additive manufacturing technologies...675 Additive manufacturing and acoustic Emission: a brief review ...632
Multi-scale Feature Imitation for Unsupervised Anomaly Localization
Creators: name: Hu, Chao
name: Lai, Shengxin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The unsupervised anomaly localization task faces the challenge of missing anomaly sample training, detecting multiple types of anomalies, and dealing with the proportion of the area of multiple anomalies. A separate teacher-student feature imitation network structure and a multi-scale processing strategy combining an image and feature pyramid are proposed to solve these problems. A network module importance search method based on gradient descent optimization is proposed to simplify the network structure. The experimental results show that the proposed algorithm performs better than the feature modeling anomaly localization method on the real industrial product detection dataset in the same period. The multi-scale strategy can effectively improve the effect compared with the benchmark method.
description: International Joint Conference on Neural Networks 2023
On Vector-Valued Schrodinger Operators in Lp-spaces
Creators: name: Maichine, Abdallah
Publisher: name: Universita degli studi di Salerno
Year: 2018
Subjects: subject: MAT/05 ANALISI MATEMATICA
subject: Schrodinger
subject: Semigroup

description: 2016 - 2017
description: We construct a realization Ap of A in the spaces Lp(Rd;Cm), 1 p < 1, that generates a contractive strongly continuous semigroup. First, by using form methods, we obtain generation of holomorphic semigroups when the potential V is symmetric. In the general case, we use some other techniques of functional analysis and operator theory to get a m-dissipative realization. But in this case the semigroup is not, in general, analytic. We characterize the domain of the operator Ap in Lp(Rd;Cm) by using rstly a non commutative version of the Dore-Venni theorem and then a perturbation theorem due to Okazawa. We discuss some properties of the semigroup such as analyticity, compactness and positivity. We establish ultracontractivity and deduce that the semigroup is given by an integral kernel. Here, the kernel is actually a matrix whose entries satisfy Gaussian upper estimates. Further estimates of the kernel entries are given for potentials with a diagonal of polynomial growth. Suitable estimates lead to the asymptotic behavior of the eigenvalues of the matrix Schr odinger operator when the potential is symmetric. [edited by Author]
Laboratory framework for understanding mix formulation for 3D printed cementitious materials
Creators: name: Rahman, Farzana
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: 3D printing
Rheology
Bingham
Printability

description: Over the recent years, additive manufacturing has gained significant traction in the arena of automated construction application via 3D printing of concrete. Unlike the regular concrete construction, 3D printing of concrete is carried out through extrusion of cementitious materials controlled digitally to print out pre-assigned architectural and structural components. Current research is focused on efficient automation of 3D concrete printers and printability of such structures. However significant fundamental research on rheology of such cementitious mixtures are absent. Before a large scale print job is undertaken it is crucial to predetermine the rheological properties and printability of the cementitious mixtures. The commonly used rheological model for fresh state concrete is the Bingham model. Since 3D printed cement-based materials are variant in mixture designs due to incorporation of various powder additives and chemical admixtures to achieve the unique processing methods that are needed for printing, an appropriate rheological model for 3D-printed mixtures is still missing. It is vital to study the flow properties and the way these properties changes with time of fresh 3D printed cementitious mixtures in order to understand the extrudability, stability and buildability of printed layers. This research presents the preliminary results aimed at characterizing the rheological properties of cementitious mixtures used for 3D printing purposes. Mix designs consisting of limestone powder, sand and chemical admixtures were formulated for understanding the rheological properties of manually controlled, printed mixtures. This is the initial phase for outlining optimum mixture design which can be employed for scaled up 3D printing construction based off the laboratory tests
The new discontinuous Galerkin methods based numerical relativity program Nmesh
Creators: name: Tichy, Wolfgang
name: Ji, Liwei
name: Adhikari, Ananya
name: Rashti, Alireza
name: Pirog, Michal
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Interpreting gravitational wave observations and understanding the physics of astrophysical compact objects such as black holes or neutron stars requires accurate theoretical models. Here, we present a new numerical relativity computer program, called Nmesh, that has the design goal to become a next generation program for the simulation of challenging relativistic astrophysics problems such as binary black hole or neutron star mergers. In order to efficiently run on large supercomputers, Nmesh uses a discontinuous Galerkin method together with a domain decomposition and mesh refinement that parallelizes and scales well. In this work, we discuss the various numerical methods we use. We also present results of test problems such as the evolution of scalar waves, single black holes and neutron stars, as well as shock tubes. In addition, we introduce a new positivity limiter that allows us to stably evolve single neutron stars without an additional artificial atmosphere, or other more traditional limiters.
description: 44 pages, 17 figures
Long-term human impact on a neotropical fluvial system in the Belize-Guatemala transboundary area
Creators: name: Donn, Leila Dolce
name: 0000-0001-8763-6068
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Human-environment interaction
Landscape change
Soils

description: Humans have played a significant role in the geomorphic evolution of the Belize River Valley in western Belize over the past 4,000 years, and this anthropogenic landscape still influences land use and flooding regimes today. Using LiDAR and GIS, fieldwork and lab analyses, I have studied the ways in which ancient Maya construction and agriculture affected the sediment budget thereby influencing geomorphic evolution of the river system. Soil geochemistry and radiocarbon dating have identified potential paleosols characterized by high levels of phosphorus, calcium, and potassium. These horizons are also composed of clay-sized particles, abundant organic matter and elevated magnetic susceptibility values. These buried soils are often overlain by a deposit of coarse, non-local sandy material that was transported from the Maya Mountains some 50 km away. These results may suggest that Maya activity caused changes to the Belize River’s sediment budget, thus contributing to the geomorphic evolution of the fluvial landscape. More research is required to further test this hypothesis
Observation of dispersive wave emission by temporal cavity solitons
Creators: name: Jang, Jae K.
name: Erkintalo, Miro
name: Murdoch, Stuart G.
name: Coen, Stephane
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We examine a coherently-driven, dispersion-managed, passive Kerr fiber ring resonator and report the first direct experimental observation of dispersive wave emission by temporal cavity solitons. Our observations are in excellent agreement with analytical predictions and they are fully corroborated by numerical simulations. These results lead to a better understanding of the behavior of temporal cavity solitons under conditions where higher-order dispersion plays a significant role. Significantly, since temporal cavity solitons manifest themselves in monolithic microresonators, our results are likely to explain the origins of spectral features observed in broadband Kerr frequency combs.
description: 4 pages, 3 figures