cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Σχεδιασμός μεθόδου κατακρήμνισης πατώματος για την εκμετάλλευση πορφυριτικού κοιτάσματος
Creators: name: Βαρδαρου Μαρινα
Publisher: name: Technical University of Crete
Year: 2019

description: Στην παρούσα διπλωματική εργασία ερευνάται η υπόγεια εκμετάλλευση πορφυριτικού κοιτάσματος με την μέθοδο της κατακρήμνισης πατώματος (Block Caving). Η μέθοδος μπορεί να εφαρμοσθεί για την εκμετάλλευση του πορφυριτικού κοιτάσματος των Σκουριών Χαλκιδικής.
Το κοίτασμα των Σκουριών αποτελεί ένα παγκοσμίου επιπέδου παράδειγμα για κοιτάσματα πορφυριτικού Cu-Au που οφείλει την γένεση του, στη διείσδυση ενός έντονα αλκαλικού πορφύρη. Η περιοχή μελέτης ανήκει στην Σερβομακεδονική μάζα και συγκεκριμένα στον σχηματισμό του Βερτίσκου. Το κοίτασμα έχει μορφή σωλήνα, διαμέτρου περίπου 440μέτρων και έχει διεισδύσει εντός αμφιβολιτικών και βιοτιτικών σχιστολίθων, κατά το Ολιγόκαινο-Μειόκαινο. Το κοίτασμα εκτείνεται από την επιφάνεια σε βάθος που ξεπερνάει τα 800m.
Η μέθοδος της κατακρήμνισης πατώματος παρέχει την δυνατότητα εκμετάλλευσης κοιτασμάτων με μεγάλη ανάπτυξη και στις 3 διαστάσεις του χώρου, με υψηλές δυνατότητες παραγωγής. Βασικό πλεονέκτημα της μεθόδου αποτελεί το χαμηλό λειτουργικό κόστος της, έτσι ώστε να επιτρέπεται η οικονομική εκμετάλλευση μεταλλευμάτων χαμηλής ποιότητας. Για την επιτυχή λειτουργία της μεθόδου, οι ιδιότητες του κοιτάσματος πρέπει να συμμορφώνονται με τις απαιτήσεις της μεθόδου, όπως παρουσία πάνω από 3 οικογενειών ασυνεχειών με μικρή απόσταση μεταξύ των, μεγάλη οριζόντια εξάπλωση, μεγάλη κλίση του κοιτάσματος και ευνοϊκό εντατικό πεδίο.
Η εκμετάλλευση του πορφυριτικού κοιτάσματος προτείνεται να γίνει με ένα συνδυασμό επιφανειακής και υπόγειας εκμετάλλευσης. Αυτό προτάσσεται, διότι οι εργασίες προετοιμασίας για την ανάπτυξη της υπόγειας μεθόδου εκμετάλλευσης είναι χρονοβόρες και απαιτούν μεγάλο κεφαλαιουχικό κόστος.
Στην εργασία αυτή, παρουσιάζεται ο σχεδιασμός της υπόγειας εκμετάλλευσης με την μέθοδο της κατακρήμνισης πατώματος. Η υπόγεια εκμετάλλευση πραγματοποιείται σε δυο φάσεις στα βάθη με υψόμετρο +70m και -180m.
Τέλος, πραγματώνεται η χρονοδρομολόγηση της εκμετάλλευσης, επιλέγεται ο βασικός εξοπλισμός που απαιτείται για τα έργα προσπέλασης, προπαρασκευής και παραγωγής και γίνεται μια πρώτη εκτίμηση της κοστολόγησης των έργων αυτών.
Group of Eight Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Eight labels (from top right to bottom right, center, then top left to bottom left) identify each fish as follows: 1. 花島魚 Hanashimauo (Bambooleaf wrasse; Pseudolabrus sieboldie (young)); 2. 無名 [name unknown] (Japanese snipefish; Macrorhamphosus scalopax); 3. 高邉 Takabe (Yellow-striped butterfish; Labracoglossa argentiventris); 4. 際魚 Kiwauo (Japanese sand lance; Ammodytes personatus); 5. 隈引 Kumahiki (Threestripe tigerfish; Terapon jarbua); 6. 左與利 Sayori (漢名 鱵魚) (Japanese halfbeak; Hyperhamphus sajori); 7. 小津奈與利 Kotsunayori (Japanese tubesnout; Aulichthys japonicus); 8. 之於 Shio (Purplish amberjack; Seriola dumerili). For further clarification, consult the key to the image in the Art Properties curatorial file.
Reinhart Herzog / Peter Lebrecht Schmidt (Hrsg.): Handbuch der lateinischen Literatur. Erster Band. Die archaische Literatur. Von den Anfängen bis zu Sullas Tod. Die vorliterarische Periode und die Zeit von 240 - 78 v. Chr. Hrsg. von Werner Suerbaum
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Reinhart Herzog / Peter Lebrecht Schmidt (Hrsg.): Handbuch der lateinischen Literatur. Erster Band. Die archaische Literatur. Von den Anfängen bis zu Sullas Tod. Die vorliterarische Periode und die Zeit von 240 - 78 v. Chr. Hrsg. von Werner Suerbaum. München (Beck) 2002, 611 S., (ISBN3-406-48134-5).
description: Forum Classicum, Nr. 3 (2003): Forum Classicum
ФЕДЕРАЛЬНЫЕ ГОСУДАРСТВЕННЫЕ ОБРАЗОВАТЕЛЬНЫЕ СТАНДАРТЫ НАЧАЛЬНОГО И ОСНОВНОГО ОБРАЗОВАНИЯ: ХАРАКТЕР ИЗМЕНЕНИЙ И ПРОБЛЕМЫ ВНЕДРЕНИЯ
Creators: name: Басюк В. С.
name: Виноградова Н.Ф.
name: Лазебникова А. Ю.
Publisher: name: Отечественная и зарубежная педагогика
Year: 2021

description: Вместо эпиграфа Более десяти лет российские школы работают по федеральным государственным образовательным стандартам (далее — ФГОС). Все это время продолжалась интенсивная доработка отдельных позиций стандарта начального общего и основного общего образования, уточнялся терминологический и понятийный аппарат, конкретизировались положения, которые были не всегда понятны для тех, кто должен пользоваться этим документом ежедневно [1; 3; 6]. Но все происходящие с ФГОС события не уменьшали числа оппонентов, которые постоянно критиковали стандарт, находя все новые и новые его недостатки. В мае 2021 года Министерство просвещения Российской Федерации утвердило усовершенствованный вариант ФГОС, поэтому нам хотелось бы оценить произошедшие в нем изменения, ответив на вопросы предполагаемых оппонентов (Комментарий 1). Оппонент: Стандарт называется образовательным, но, как известно, образование включает обучение, развитие и воспитание. Если обучение представлено достаточно подробно предметными результатами, то воспитание сделано формально и не соответствует современным требованиям общества и государства.
Advancing the conductivity-permselectivity tradeoff of electrodialysis ion-exchange membranes with sulfonated CNT nanocomposites
Creators: name: Fan, Hanqing
name: Huang, Yuxuan
name: Yip, Ngai Yin
Publisher: name: Columbia University
Year: 2020
Subjects: Ion-permeable membranes
Carbon nanotubes
Nanocomposites (Materials)
Membranes (Technology)
Electrodialysis

description: Ion exchange membranes, IEMs, are widely applied in water and energy technologies, such as, electrodialysis for desalination and reverse electrodialysis for sustainable power generation. However, a tradeoff between conductivity and permselectivity constrains the efficiency of IEM-based technologies. The incorporation of rationally functionalized 1-dimensional nanomaterials as fillers into the polymer matrix offers opportunities to depart from this tradeoff. In this study, we develop nanocomposite cation exchange membranes by incorporating sulfonic acid-functionalized carbon nanotubes, sCNTs, in sulfonated poly(2,6-dimethyl-1,4-phenyleneoxide) polymer matrix. The fabricated nanocomposite IEMs exhibit improved conductivity while maintaining permselectivity. Intrinsic resistivity, the reciprocal of conductivity, is lowered with greater blending of sCNTs fillers, decreasing by approximately 25% with 20 w/w% incorporation of sCNTs, while permselectivity is effectively unchanged across the different degrees of sCNT incorporation (within 2% variation). Compared with pristine membranes, the conductivity-permselectivity tradeoff line of the fabricated nanocomposite membranes is advantageously advanced, thus improving overall performance. Further characterization and analysis show a percolating network of carbon nanotubes is achieved in the polymer matrix with 10 w/w% sCNTs. We posit that the improved effective ionic conductivity is attributed to the interconnected sCNT network reducing the tortuosity of the ion transport path. This study demonstrates the promise of percolating 1D nanomaterial networks to potentially advance the conductivity-permselectivity tradeoff governing conventional IEMs.
Robust Smoothing for Estimating Optical Phase Varying as a Continuous Resonant Process
Creators: name: Roy, Shibdas
name: Rehman, Obaid Ur
name: Petersen, Ian R.
name: Huntington, Elanor H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Continuous phase estimation is known to be superior in accuracy as compared to static estimation. The estimation process is, however, desired to be made robust to uncertainties in the underlying parameters. Here, homodyne phase estimation of coherent and squeezed states of light, evolving continuously under the influence of a second-order resonant noise process, are made robust to parameter uncertainties using a robust fixed-interval smoother, designed for uncertain systems satisfying a certain integral quadratic constraint. We observe that such a robust smoother provides improved worst-case performance over the optimal smoother and also performs better than a robust filter for the uncertain system.
description: 6 pages, 7 figures, Proceedings of the 2014 European Control Conference, pp. 896-901
How Self-Propelled Particles (SPP) Models can explain the Origin of Collective Behaviour
Creators: name: Abutuqayqah, Hajar
Publisher: name: University of Leicester
Year: 2022
Subjects: Uncategorized

description: In this work we explore the collective behavior of self–driven particles in active matter. We analyze the mechanisms of the emerging circular motion through Vicsek–like models with a leader. We consider both a circular trajectory of the leader (”shepherd” – a hierarchical leader that orbits a fixed circle with a constant speed) and linearly–moving leader (i.e. a hierarchical leader that moves with a constant speed in a fixed direction) or a group of leaders. We show that the circular motion may not be supported by Vicsek-like models. We also analyze models based on the inter–particle interaction forces. We considered rather large systems which allows to analyze thermodynamic–like behavior with different phases. We report the existence of different phases of the system, gaseous, liquid, swirlonic, collapsed and solid phases, depending on the system parameters. Here the new swirlonic phase is composed of new quasi-particles, comprised of active particles orbiting a common center of mass. Surprisingly, we do not observe the coexistence of different phases, although it is common for conventional matter. Finally, to explore a possible coexistence of phases we analyze systems, comprised of active particles of two different types, which differ either by their motility of by the interaction potential. We observed a rich behavior of these system, with numerous phases and phase coexistence. For instance, we found that the novel swirlonic phase might coexist in such systems with gaseous and liquid phase, or even be dissolved in these phases. Several theoretical approaches are developed and extensive numerical simulations are pereformed in this work. Our theoretical predictions are in a good quantitative and qualitative agreement with the numerical results.
title: Συμβολή της σεισμικής ανάκλασης στην απεικόνιση του υπεδάφους για την παρακολούθηση κατολισθήσεων σε περιοχή στις Βαυαρικές Άλπεις
Creators: name: Αργυρης Θεοδωρος
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα διπλωματική εργασία μελετά τη διαχείριση συνθετικών δεδομένων σει-σμικής ανάκλασης για την παρακολούθηση κατολισθήσεων σε περιοχή των Βαυαρικών Άλπεων. Αρχικά, καταγράφεται αναλυτικά ο τρόπος και η διαδικασία δημιουργίας των συνθετικών δεδομένων. Στο πλαίσιο αυτό, εφαρμόστηκε η μέθοδος των πεπερασμένων διαφορών με τη χρήση του περιβάλλοντος Matlab και σχετικών αλγορίθμων. Η όλη διαδικασία έλαβε χώρα στο Εργαστήριο Εφαρμοσμένης Γεωφυσικής του Πολυτεχνείου Κρήτης.
Στη συνέχεια, περιγράφεται η επεξεργασία των συνθετικών δεδομένων, η οποία περιλαμβάνει τη στατική διόρθωση των συνθετικών δεδομένων, τον υπολογισμό της μέσης τετραγωνικής ταχύτητας, τη σεισμική χωροθέτηση και τη σεισμική υπέρθεση (stacking). Για την επίτευξη βελτιωμένης αναπαράστασης της τομής σεισμικής υπέρθεσης έγινε χρήση του προγράμματος Transform.
Ακόμη, πραγματοποιήθηκε χωροθέτηση πριν την υπέρθεση, κατά την οποία χωρο-θετήθηκαν τα δεδομένα της κοινής πηγής, καθώς και κάθε πηγής μεμονωμένα, και κα-τόπιν προστέθηκαν τα χωροθετημένα στοιχεία από το σύνολο των πηγών, με στόχο τη διαμόρφωση της χωροθετημένης πλέον σεισμικής τομής. Στην διαδικασία της υπέρθεσης αθροίζονται όλα τα σεισμογράμματα, το οποίο συνεπάγεται την αύξηση του πλάτους των κυμάτων που ανακλώνται και επιπλέον την ενίσχυση του σήματος των σεισμικών ανακλάσεων.
Από την επεξεργασία προέκυψε ότι η σεισμική ανάκλαση είναι κατάλληλη μέθοδος για την απεικόνιση της ζώνης ολίσθησης. Η απεικόνιση των στρωμάτων είναι περιορισμένη λόγω μικρού αριθμού πηγών. Για την καλύτερη απεικόνιση των ανακλαστήρων, προτείνεται η αύξηση τους πλήθους των σεισμικών πηγών από έξι τουλάχιστον σε είκοσι. Επιπλέον, κρίνεται κατάλληλο να επαναληφθεί η διαδικασία της στατικής διόρθωσης χρησιμοποιώντας μοντέλο δύο στρωμάτων για τον ακριβέστερο υπολογισμό της.
Group of Three Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Three labels (clockwise from upper right) identify each fish as follows: 1. 追剥 Oihagi (Threadsail filefish; Stephanolepis cirrhifer); 2. 蓍剥 Medohagi (Sawtail; Prionurus scalprum); 3. 與曽義 Yosogi (又 剥魚) (Black scraper; Thamnaconus modestus). For further clarification, consult the key to the image in the Art Properties curatorial file.
Duden. Das Wörterbuch medizinischer Fachausdrücke. 7., vollständig überarbeitete und ergänzte Auflage
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Duden. Das Wörterbuch medizinischer Fachausdrücke. 7., vollständig überarbeitete und ergänzte Auflage. 856 S. Dudenverlag, Mannheim usw. 2003, (ISBN 3-411-04617-1).
description: Forum Classicum, Nr. 3 (2003): Forum Classicum
Group of Three Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Three labels (clockwise from the top) identify each fish as follows: 1. 金鉾赤目 Kanahokoakame (Alfonsino; Beryx splendens); 2. 葛目張 Katsuramebaru (Saddled brown rockfish; Sebastes joyneri); 3. 黒目張 Kuromebaru (Schlegel' s black rockfish; Sebastes schlegelii). For further clarification, consult the key to the image in the Art Properties curatorial file.
Philipp Vandenberg, Cäsar und Kleopatra. Die letzten Tage der römischen Republik
Creators: name: Nitschke, Jens
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Philipp Vandenberg, Cäsar und Kleopatra. Die letzten Tage der römischen Republik, Bergisch Gladbach, 2000.
description: Forum Classicum, Nr. 3 (2003): Forum Classicum
Dynamical influence processes on networks: General theory and applications to social contagion
Creators: name: Harris, Kameron Decker
name: Danforth, Christopher M.
name: Dodds, Peter Sheridan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We study binary state dynamics on a network where each node acts in response to the average state of its neighborhood. Allowing varying amounts of stochasticity in both the network and node responses, we find different outcomes in random and deterministic versions of the model. In the limit of a large, dense network, however, we show that these dynamics coincide. We construct a general mean field theory for random networks and show this predicts that the dynamics on the network are a smoothed version of the average response function dynamics. Thus, the behavior of the system can range from steady state to chaotic depending on the response functions, network connectivity, and update synchronicity. As a specific example, we model the competing tendencies of imitation and non-conformity by incorporating an off-threshold into standard threshold models of social contagion. In this way we attempt to capture important aspects of fashions and societal trends. We compare our theory to extensive simulations of this "limited imitation contagion" model on Poisson random graphs, finding agreement between the mean-field theory and stochastic simulations.
description: 12 pages, 7 figures
[Gymnasium 110, 2003, H. 4 / Museum Helveticum 60, 2003, H. 3 / Göttingische Gelehrte Anzeigen 255, 2003, H.1-2…]
Creators: name: Mensching, Eckart
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 4 (2003): Forum Classicum
title: Επίδραση της τεχνικής της ελεγχόμενης έκπλυσης στη θερμική συμπεριφορά και λειτουργία των κλιβάνων κατά την συν-καύση λιγνιτών και βιομαζικών υλικών
Creators: name: Αυγουστιδης-Μεριανος Χρηστος
Publisher: name: Technical University of Crete
Year: 2019

description: Η συν-καύση των αγροτικών ή δασικών υπολειμμάτων με λιγνίτη σε υφιστάμενους σταθμούς ηλεκτροπαραγωγής έχει κεντρίσει το ενδιαφέρον τα τελευταία χρόνια, διότι εκτός από τα περιβαλλοντικά οφέλη, αντικαθιστά μέρος των συμβατικών καυσίμων και δεν απαιτεί μεγάλες επενδύσεις σε νέες μονάδες βιομάζας. Στα πλαίσια της εργασίας αυτής, μελετήθηκε η θερμική συμπεριφορά βιομαζικών υλικών (κλαδοδέματα ακακίας, άχυρο σίτου, στελέχη αγγινάρας, υπολείμματα εκκοκισμού βάμβακος και πυρήνες ροδάκινου) κατά την συν-καύση τους με τους λιγνίτες Μαυροπηγής και Νότιου Πεδίου. Επίσης, διερευνήθηκε η θερμική συμπεριφορά των δειγμάτων μετά την απομάκρυνση προβληματικών στοιχείων κατά την καύση τους.
Η καύση των βιομαζικών υλικών πραγματοποιήθηκε μεταξύ 192 και 566ºC και στους λιγνίτες μεταξύ 208 και 736 ºC, ενώ η θερμοχημική αντιδραστικότητα ακολούθησε τη σειρά : άχυρο σίτου> κλαδοδέματα ακακίας> υπολείμματα εκκοκισμού βάμβακος> στελέχη αγγινάρας> πυρήνες ροδάκινου> λιγνίτης Νότιου Πεδίου> λιγνίτης Μαυροπηγής. Κατά την συν- καύση των δύο λιγνιτών με τα βιομαζικά υλικά παρατηρήθηκε ότι όσο αυξάνεται το ποσοστό συμμετοχής της βιομάζας στο μίγμα, αυξάνεται ο ρυθμός καύσης του μίγματος και τα μέγιστα των ρυθμών μετατοπίστηκαν σε χαμηλότερες θερμοκρασίες. Η τάση επικαθίσεων/επισκωριώσεων των μιγμάτων λιγνίτη/εκχυλισμένων βιομαζικών υλικών μειώθηκε. Στους λιγνίτες, με την προσθήκη των βιομαζικών υλικών αυξήθηκε η θερμοκρασία αρχικής παραμόρφωσης της τέφρας στα μίγματα (έως και 60℃), καθώς και η θερμοκρασία ροής (έως 40℃) σε σύγκριση με τους λιγνίτες. Όταν τα εκχυλισμένα βιομαζικά υλικά αναμίχθηκαν με τους λιγνίτες, παρατηρήθηκε ότι όλες οι θερμοκρασίες τήξης αυξήθηκαν σε σύγκριση με τις θερμοκρασίες των μη εκχυλισμένων μιγμάτων.
RS-DAT: Deployable analysis environment for remote sensing
Creators: name: Chandramouli, Pranav
Publisher: name: Zenodo
Year: 2022
Subjects: research software
software development
earth observation
remote sensing
data access
data processing

description: RS-DAT is an eScience Center - SURF Alliance project that aim to lessen the gap between the use of large-scale computing infrastructure that can provide for processing and analyzing big geospatial and Earth observation data, and the accustomed workflows of researchers with specific skills and technical knowledge. For this purpose, it provides tools and middleware focusing on common issues in the Earth Observation and Remote Sensing workflow chains, such as efficient and effective data access, reproducible research, and paralla/distributed computing. It lowers the barrier to use technologies like SpatioTemporal Asset Catalog (STAC), DASK, docker, dCache, as well as HPC computing infrastructure such as Snellius and SPIDER.
Group of Three Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Three labels (clockwise from the top) identify each fish as follows: 1. 別種鷹羽 Besshu takanoha (Whitespot-tail morwong; Goniistius zonatus); 2. 田守 Tamori (Skewband grunt; Hapalogenys nitens); 3. 黒鏡鯛 Kurokagami-dai (又 的魚) (Targetfish; Zeus faber). For further clarification, consult the key to the image in the Art Properties curatorial file.
On the Initial Value Problem for Causal Variational Principles
Creators: name: Finster, Felix
name: Grotz, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We formulate the initial value problem for causal variational principles in the continuous setting on a compact metric space. The existence and uniqueness of solutions is analyzed. The results are illustrated by simple examples.
description: 26 pages, LaTeX, 2 figures, minor improvements (published version)
Quantum Steering Ellipsoids
Creators: name: Jevtic, Sania
name: Pusey, Matthew F.
name: Jennings, David
name: Rudolph, Terry
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum steering ellipsoid of a two-qubit state is the set of Bloch vectors that Bob can collapse Alice's qubit to, considering all possible measurements on his qubit. We provide an elementary construction of the ellipsoid for arbitrary states, calculate its volume, and explain how this geometric representation can be made faithful. The representation provides a range of new results, and uncovers new features, such as the existence of "incomplete steering" in separable states. We show that entanglement can be analysed in terms of three geometric features of the ellipsoid, and prove that a state is separable if and only if it obeys a "nested tetrahedron" condition.
description: 5+9 pages, 3+8 figures. v2: Re-organisation and improved notation, new discussion of possible extensions
Group of Five Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Five labels (top right to middle right, then top left to bottom) identify each fish: 1. 義々 Gigi (漢名 黄顙魚) (Striped catfish eel; Plotosus lineatus); 2. 土゛世゛宇゛ Dojō (漢名 泥鰌) (Oriental weatherfish; Misgurnus anguillicaudatus); 3. 柳泥鰌 Yanagidojō (Spined loach; Cobitis striata); 4. 加持加 Kajika (漢名 杜父魚・俗名 川於古世゛) (Japanese sculpin; Cottus japonicus); 5. 鯰 Namazu (漢名 鮧魚) (Japanese catfish; Silurus asotus). For further clarification, consult the key to the image in the Art Properties curatorial file.
First steps in the development of a support application for Easy-to-Read adaptation: Supplementary Information
Creators: name: Suárez-Figueroa, Mari Carmen
name: Diab, Isam
name: Ruckhaus, Edna
name: Cano, Isabel
Publisher: name: Zenodo
Year: 2022

description: This record presents the supplementary information of the paper entitled "First steps in the development of a support application for Easy-to-Read adaptation": Appendix A includes tables and figures to complete the content of the paper The questionnaire (via Google Forms) we used in the paper A csv document that contains the responses obtained in the user study performed in the context of the paper.
A novel data-driven method to estimate GIA from GPS and GRACE
Creators: name: Vishwakarma, Bramha D
name: Ziegler, Yann
name: Royston, Sam
name: Bamber, Jonathan L
Publisher: name: Zenodo
Year: 2022

description: Presentation at European Space Agency (ESA) 2022 Living Planet Symposium, 23-27 May, Bonn
A new approach to the equivariant topological complexity
Creators: name: Lubawski, Wojciech
name: Marzantowicz, Wacław
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55M99, 57S10 (Primary), 55M30, 55R91 (Secondary)

description: We present a new approach to equivariant version of the topological complexity, called a symmetric topological complexity. It seems that the presented approach is more adequate for the analysis of an impact of symmetry on the the motion planning algoritm than the one introduced and studied by Colman and Grant. We show many bounds for the symmetric topological complexity comparing it with already known invariants and prove that in the case of a free action it is equal to the Farber's topological complexity of the orbit space. We define the Whitehead version of it.
description: 18 pages, new 3 figures, minor bugs and misprints fixed
title: Aktualisierte Risikobewertung zu Gehalten an 1,2-ungesättigten Pyrrolizidinalkaloiden (PA) in Lebensmitteln: Stellungnahme Nr. 026/2020 des BfR vom 17. Juni 2020
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2020
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2020, no. 026
title: Ποιοτική αναβάθμιση μεταλλεύματος βωξίτη, μέσω διαφόρων μεθόδων εμπλουτισμού
title: Upgrading of bauxite ore using various mineral processing methods
Creators: name: Μιχαηλ Ιωαννης
Publisher: name: Technical University of Crete
Year: 2019

description: Αντικείμενο της διπλωματικής εργασίας ήταν η ποιοτική αναβάθμιση μεταλλεύματος βωξίτη από την περιοχή του Παρνασσού μέσω διαφόρων μεθόδων εμπλουτισμού. Αρχικά πραγματοποιήθηκαν δοκιμές εκλεκτικής λειοτρίβησης με στόχο τον προσδιορισμό των βέλτιστων συνθηκών για την πιθανή αναβάθμιση του μεταλλεύματος. Στη συνέχεια, μέσω κλασικών μεθόδων (επίπλευση και μαγνητικός διαχωρισμός) μελετήθηκε ο εμπλουτισμός του μεταλλεύματος σε επιλεγμένα κοκκομετρικά κλάσματα που προέκυψαν από τις δοκιμές λειοτρίβησης.
Από τη χημική και ορυκτολογική ανάλυση τoυ αρχικού υλικού προέκυψε ότι τα κυριότερα οξείδια ήταν το Al2O3 (58%), Fe2O3 (22%) και TiO2 (4%), ενώ οι κύριες ορυκτολογικές φάσεις ήταν το διάσπορο (AlO(OH)), ο βαιμίτης (AlO(OH), ο αιματίτης (Fe2O3), ο ανατάσης (TiO2) και ο καολινίτης (Al2O3.2SiO2.2H2O).
Οι δοκιμές λειοτρίβησης πραγματοποιήθηκαν σε σφαιρόμυλο, με χρήση σφαιρών διαφορετικών διαμέτρων (12,7, 25,4 και 40 mm), σε τέσσερις διαφορετικούς χρόνους λειοτρίβησης (2, 4, 8, και 12 min) και για τρειίς διαφορετικούς συντελεστές πλήρωσης fc (0,05, 0,1, 0,15) του μύλου με υλικό. Τα αποτελέσματα έδειξαν ότι η μεγαλύτερη περιεκτικότητα του Al2O3 (65,15%), που αντιστοιχεί σε αύξηση 6,28%, επιτεύχθηκε στο χονδρό κλάσμα (-3,35+1,18 mm), για χρόνο λειοτρίβησης 8 min και για πλήρωση του υλικού fc = 0,05. Μεγαλύτερος ρυθμός θραύσης του μεταλλεύματος επιτυγχάνεται στη μικρότερη πλήρωση που επιλέχθηκε (fc = 0,05). Γενικά, υπάρχει μια τάση αύξησης της ανάλυσης περιεκτικότητας % του Al2O3 με την αύξηση του χρόνου λειοτρίβησης πάνω από ένα συγκεκριμένο μέγεθος προϊόντος, γεγονός που δείχνει ότι σε μεγαλύτερα ενεργειακά επίπεδα το υλικό πάνω από αυτό μέγεθος εμπλουτίζεται ως προς το Al2O3. Ανάκτηση του Al2O3 μεγαλύτερη από 70% επιτυγχάνεται και στις τρείς διαφορετικές πληρώσεις του μύλου, με μεγαλύτερη στο συντελεστή πλήρωσης fc = 0,15. Σε αυτές τις συνθήκες η ανάκτηση έφτασε έως και 90%, με ανάλυση περιεκτικότητα Al2O3 περίπου 62% (αύξηση 2-3%).
Στην μελέτη επίπλευσης δεν παρουσιάστηκαν ενθαρρυντικά αποτελέσματα καθώς δεν επιτεύχθηκε εμπλουτισμός του μεταλλεύματος. Πραγματοποιήθηκαν τρείς δοκιμές για τους αντίστοιχους συντελεστές fc, με μέγεθος τροφοδοσίας -0,300 mm και πυκνότητα πολφού 30% στερεά. Από τα αποτελέσματα, δεν παρατηρήθηκε ιδιαίτερη μεταβολή στην περιεκτικότητα των οξειδίων. Τέλος, στον μαγνητικό διαχωρισμό πραγματοποιήθηκαν δοκιμές σε τρεις διαφορετικούς μαγνήτες, για τρία κοκκομετρικά κλάσματα (-3,35+1,18, -1,18+0,300, -0,300 mm). Από τις χημικές αναλύσεις προκύπτει ότι στο ενοποιημένο κλάσμα +0,300 mm, η μεγαλύτερη τιμή της περιεκτικότητας (66,9%, αύξηση 7,8%) του Al2O3 παρατηρείται στο μη μαγνητικό 2 (ΜΜ2) όταν ο συντελεστής πλήρωσης ήταν fc = 0,05 και σε χρόνο λειοτρίβησης 2,7 min, ενώ στο κλάσμα -0,300 mm η μεγαλύτερη τιμή της περιεκτικότητας (61,6%, αύξηση 7,5%) του Al2O3, παρατηρείται στο μη μαγνητικό 1 (ΜΜ1) στον ίδιο συντελεστή πλήρωσης και στον ίδιο χρόνο λειοτρίβησης.
Group of Two Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Two labels (top to bottom) identify each fish as follows: 1. 真魥 Makochi (Bar-tailed flathead; Platycephalus sp.); 2. 魥 Kochi (漢名 牛尾魚・讃州方言 黒魥) (Bar-tailed flathead; Platycephalus sp.).
title: Εύρωστη αναγνώριση φωνής για πολλαπλά τοπολογικά σενάρια του GSM δικτύου κινητής τηλεφωνίας
Creators: name: Σαλωνίδης Θεόδωρος
Publisher: name: Technical University of Crete
Year: 1997

description: Μη διαθέσιμο
Monitoring Asthma in School-aged Children using the Forced Oscillation Technique
Creators: name: AlRaimi, Afnan Saleh
Publisher: name: University of Leicester
Year: 2022
Subjects: Uncategorized

description: Background: Diagnosing asthma in school-aged children can be difficult, as spirometry can be challenging and even when successful is often normal when the patient is stable. Forced Oscillation Technique (FOT) could offer a rapid, non-invasive alternative test that reflects the resistance and reactance of the lungs during spontaneous breathing, requiring minimal patient cooperation. Aims: To assess FOT measurements in children with acute, stable and uncontrolled asthma before and after bronchodilator administration (BDR), while also comparing the FOT to other lung function tests. Methods: Children aged 5–16 years with stable controlled or uncontrolled asthma or doctor-diagnosed asthma attacks were eligible. A control group of healthy children in the same age range was also included. After obtaining informed consent, we assessed FOT using waveforms of 5–37 Hz and 7–41 Hz, before and after bronchodilation with salbutamol inhalation in asthma patients only. We reported, each at 5 or 7 Hz, the (i) resistance (Rrs5 or Rrs7), (ii) differences in resistance over the frequency range to 20 Hz (Rrs5-20 or Rrs7-20), (iii) reactance (Xrs5 or Xrs7) and (iv) area under the reactance curve (AX). Results: FOT was feasible in cases of stable controlled and uncontrolled asthma and in children with asthma attacks. Of the reported parameters, AX best discriminated between asthmatic and healthy children. FOT measurements were more sensitive in children with stable asthma with diagnoses confirmed by objective tests than in those with incomplete or no evidence. In addi-tion, FOT measurements at 5–37 Hz and 7–41 Hz showed significant airway improvements following bronchodilator in children with acute and uncontrolled asthma, with no significant differences between measurements at different frequencies. Conclusion: FOT measurements, including the assessment of BDR, are feasible in school-aged children with asthma. FOT is a useful method that could be applied alongside additional objective testing methods in asthmatic children.
Anita Maris Boggs
Creators: name: Serna, Laura Isabel
Publisher: name: Columbia University
Year: 2020
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: Anita Maris Boggs was the co-founder of the Bureau of Commercial Economics, a Washington D.C.-based distributor of industrial and educational films that was founded in 1913 and dissolved sometime in the 1930s. Despite its official sounding name, the Bureau was not a government agency. Rather, it was a charitable institution supported by sponsors, donors, and the modest fees it charged for the shipping of film prints. International in scope, the organization described itself as “an association of the governments, institutions, manufacturers, producers and transportation lines of America and other countries,” whose goal was “to engage in disseminating geographical, commercial, industrial, and vocational information by the graphic method of motography” (Bureau of Commercial Economics 2). Its films, distributed via a network of university extension services and other partners, were screened free of charge to audiences in universities, high schools, convention halls, community centers, prisons, and even on screens set up outdoors. In 1920, the Bureau claimed to be reaching two million viewers a month.
S. Schäfer: Würde und Bürde des Humanismus. Elf Abitur-Reden an einem (ehemals) altsprachlichen Gymnasium
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: S. Schäfer: Würde und Bürde des Humanismus. Elf Abitur-Reden an einem (ehemals) altsprachlichen Gymnasium. Kelkheim (M. G. Schmitz) 2002. 74 S. (ISBN 3-922272-84-3).
description: Forum Classicum, Nr. 1 (2004): Forum Classicum
The role of albumin in compound transport: new possibilities by intravital imaging
Creators: name: Hamdy, Amira
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2022
Subjects: albumin
intravital imaging
compound transport

description: EXCLI Journal; 21:Doc1352; ISSN 1611-2156
title: Σχεδιασμός & κατασκευή συστήματος αυτόματης διεπιλογής κλήσεων με αναγνώριση φωνής για το τηλεφωνικό κέντρο της Πολυτεχνειούπολης
Creators: name: Κουμπής Κωνσταντίνος
Publisher: name: Technical University of Crete
Year: 1997

description: Μη διαθέσιμο
title: Μελέτη χαρακτηριστικών καθυστέρησης πακέτων και μηνυμάτων πληροφορίας σε ένα κόμβο δικτύου για εκρηκτικές διαδικασίες άφιξης
Creators: name: Τοπαλόγλου Νικόλαος
Publisher: name: Technical University of Crete
Year: 1997

description: Μη διαθέσιμο
Group of Two Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Two labels (top to bottom) identify each fish as follows: 1. 石目張 Ishimebaru (Brassblotched rockfish; Sebastes pachycephalus chalcogrammus); 2. 赤鉾 Akahoko (Honeycomb rockfish; Hozukius emblemarius).
Foreign Direct Investment in India: Trend and Direction Analysis
Creators: name: Alam, Aftab
Publisher: name: figshare
Year: 2023
Subjects: International economics

description: The analysis of FDI inflow in India shows a fluctuating trend. It shows wide variation over the study period. There is lack of consistency. Further it is also observed that the FDI inflow is positively skewed towards few states namely Maharashtra, Dadra & Nagar Haveli and Daman & Diu and Delhi NCR region. The Mumbai region and Delhi NCR region together attracted almost 50% of total FDI in India. Moreover it is concluded that major FDI inflow in India came through Mauritius and Singapore. It is because especially India entered into double taxations avoidance agreement (DDTA) with Mauritius leading to protection from taxations in India.
Pangea B and the Late Paleozoic Ice Age
Creators: name: Kent, Dennis V.
name: Muttoni, Giovanni
Publisher: name: Columbia University
Year: 2020
Subjects: Paleozoic Geologic Period
Orogenic belts
Carbon cycle (Biogeochemistry)
Weathering
Paleoclimatology

description: The Late Paleozoic Ice Age (LPIA) was the penultimate major glaciation of the Phanerozoic. Published compilations indicate it occurred in two main phases, one centered in the Late Carboniferous (~315 Ma) and the other in the Early Permian (~295 Ma), before waning over the rest of the Early Permian and into the Middle Permian (~290 Ma to 275 Ma), and culminating with the final demise of Alpine-style ice sheets in eastern Australia in the Late Permian (~260 to 255 Ma). Recent global climate modeling has drawn attention to silicate weathering CO2 consumption of an initially high Greater Variscan edifice residing within a static Pangea A configuration as the leading cause of reduction of atmospheric CO2 concentrations below glaciation thresholds. Here we show that the best available and least-biased paleomagnetic reference poles place the collision between Laurasia and Gondwana that produced the Greater Variscan orogen in a more dynamic position within a Pangea B configuration that had about 30% more continental area in the prime equatorial humid belt for weathering and which drifted northward into the tropical arid belt as it transformed to Pangea A by the Late Permian. The presence of widespread equatorial coal basins with Euramerica flora in the footprint of the Greater Variscan orogen during the Late Carboniferous is more compatible with a heterogeneous horst-and-graben morphology, characterized by uplifted crystalline massifs acting as loci of intense silicate weathering CO2 consumption and supplying sediment for proximal basins as venues of organic carbon burial, than a contiguous high mountain plateau, as assumed in recent climate modeling of the LPIA and its demise. The culminating phase of the LPIA occurred at about 275 Ma with the transformation from Pangea B to Pangea A and the attendant reduction of continental area in the equatorial humid belt, as well as with continued northward drift that placed what remained of the Greater Variscan orogen into the Zechstein arid belt in the Late Permian, by which time the geologic landscape was largely blanketed with siliciclastics. The resulting warming from reduced silicate weathering and thus increasing pCO2 was interrupted at 260 Ma with a cooling trend that coincided with emplacement of the Emeishan large igneous province on the equatorial South China Craton as well as the drift of the Cimmerian continental blocks through the equatorial humid belt due to opening of the Neo-Tethys. A return to ice age conditions from the increase in silicate weathering uptake of CO2 was avoided by drift of the Emeishan large igneous province out of the equatorial belt, that in conjunction with massive outgassing from emplacement of the Siberian Traps in high latitudes at the end of the Permian (252 Ma), helped steer the climate system to sustained non-glacial conditions.
Bianchi Type-$V$ cosmology in $f(R,T)$ gravity with $Λ(T)$
Creators: name: Ahmed, Nasr
name: Pradhan, Anirudh
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: A new class of cosmological models in $f(R, T)$ modified theories of gravity proposed by Harko et al. (2011), where the gravitational Lagrangian is given by an arbitrary function of Ricci scalar $R$ and the trace of the stress-energy tensor $T$, have been investigated for a specific choice of $f(R, T) = f_{1}(R) + f_{2}(T)$ by considering time dependent deceleration parameter. The concept of time dependent deceleration parameter (DP) with some proper assumptions yield the average scale factor $a(t) = \sinh^{\frac{1}{n}}(αt)$, where $n$ and $α$ are positive constants. For $0 < n \leq 1$, this generates a class of accelerating models while for $n > 1$, the models of universe exhibit phase transition from early decelerating phase to present accelerating phase which is in good agreement with the results from recent astrophysical observations. Our intention is to reconstruct $f(R,T)$ models inspired by this special law for the deceleration parameter in connection with the theories of modified gravity. In the present study we consider the cosmological constant $Λ$ as a function of the trace of the stress energy-momentum-tensor, and dub such a model "$Λ(T)$ gravity" where we have specified a certain form of $Λ(T)$. Such models may display better uniformity with the cosmological observations. The statefinder diagnostic pair $\{r,s\}$ parameter has been embraced to characterize different phases of the universe. We also discuss the physical consequences of the derived models.
description: 16 pages, 10 figures. I have removed the over lap
Heike Schmoll: Lob der Elite. Warum wir sie brauchen
Creators: name: Meißner, Helmut
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Heike Schmoll: Lob der Elite. Warum wir sie brauchen. C.H. Beck Verlag, München 2008.
description: Forum Classicum, Nr. 1 (2008): Forum Classicum
Group of Two Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Two labels (right to left) identify each fish as follows: 1. 別種左々゛伊破不加 Besshu Sazaiwari-buka (Japanese bullhead shark; Heterodontus japonicus); 2. 左々゛伊破不加 Sazaiwari-buka (Japanese bullhead shark; Heterodontus japonicus).
Asymptotic behaviour of ruin probabilities in a general discrete risk model using moment indices
Creators: name: Lehtomaa, Jaakko
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60E05, 60G07, 60K25, 60K35

description: We study the rough asymptotic behaviour of a general economic risk model in a discrete setting. Both financial and insurance risks are taken into account. Loss during the first $n$ years is modelled as a random variable $B_1+A_1B_2+\ldots+A_1\ldots A_{n-1}B_n$, where $A_i$ corresponds to the financial risk of the year $i$ and $B_i$ represents the insurance risk respectively. Risks of the same year $i$ are not assumed to be independent. The main result shows that ruin probabilities exhibit power law decay under general assumptions. Our objective is to give a complete characterisation of the relevant quantities that describe the speed at which the ruin probability vanishes as the amount of initial capital grows. These quantities can be expressed as maximal moments, called moment indices, of suitable random variables. In addition to the study of ultimate ruin, the case of finite time interval ruin is considered. Both of these investigations make extensive use of the new properties of moment indices developed during the first half of the paper.
description: Peer-reviewed version, results stay the same
Group of Three Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Three labels (clockwise from the top) identify each fish as follows: 1. 銀河豚 Ginfugu (Redeye puffer; Takifugu chrysops); 2. 鯖河豚 Sabafugu (Striped puffer; Takifugu xanthopterus). ; 3. 名護屋河豚 Nagoyafugu (又 岩河豚・又 米河豚) (Purple puffer; Takifugu porphyreus). For further clarification, consult the key to the image in the Art Properties curatorial file.
Detlef Liebs: Lateinische Rechtsregeln und Rechtssprichwörter
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Detlef Liebs: Lateinische Rechtsregeln und Rechtssprichwörter, zusammengest., übers. und erläut. v. Detlef Liebs. 7., vollständig überarb. und verbess. Auflage. Beck, München 2007 (ISBN 978 3 406 56294 5).
description: Forum Classicum, Nr. 1 (2008): Forum Classicum
Characterisation of the Berkovich Spectrum of the Banach Algebra of Bounded Continuous Functions
Creators: name: Mihara, Tomoki
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Functional Analysis (math.FA)
subject: General Topology (math.GN)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 11S80, 18B30, 46S10

description: For a complete valuation field k and a topological space X, we prove the universality of the underlying topological space of the Berkovich spectrum of the Banach k-algebra Cbd(X,k) of bounded continuous k-valued functions on X. This result yields three applications: a partial solution to an analogue of Kaplansky conjecture for the automatic continuity problem over a local field, comparison of two ground field extensions of Cbd(X,k), and non-Archimedean Gel'fand theory.
description: 32 pages
Multiuser MISO Beamforming for Simultaneous Wireless Information and Power Transfer
Creators: name: Xu, Jie
name: Liu, Liang
name: Zhang, Rui
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Simultaneous wireless information and power transfer (SWIPT) is anticipated to have abundant applications in future machine or sensor based wireless networks by providing wireless data and energy access at the same time. In this paper, we study a multiuser multiple-input single-output (MISO) broadcast SWIPT system, where a multi-antenna access point (AP) sends information and energy simultaneously via spatial multiplexing to multiple single-antenna receivers each of which implements information decoding (ID) or energy harvesting (EH). Since EH receivers in practice operate with considerably higher received power than ID receivers, we propose a receiver location based transmission scheduling, where receivers that are close to the AP are scheduled for EH while those more distant from the AP for ID. We aim to maximize the weighted sum-power transferred to all EH receivers subject to a given set of minimum signal-to-interference-and-noise ratio (SINR) constraints at different ID receivers. In particular, we consider two types of ID receivers (referred to as Type I and Type II, respectively) without or with the capability of cancelling the interference from (a priori known) energy signals. For each type of ID receivers, we formulate the joint information and energy transmit beamforming design as a non-convex quadratically constrained quadratic program (QCQP). First, we obtain the globally optimal solutions for our formulated QCQPs by applying an optimization technique so-called semidefinite relaxation (SDR). It is shown via SDR that no dedicated energy beam is needed for Type I ID receivers to achieve the optimal solution; while for Type II ID receivers, employing no more than one energy beam is optimal. Next, we establish a new form of the celebrated uplink-downlink duality to develop alternative algorithms to obtain the same optimal solutions as SDR.
description: This is the longer version of a paper to appear in IEEE Transactions on Signal Processing
Development of metal matrix nanocomposite based on AZ91 magnesium alloy using conventional stir casting assisted ultrasonic treatment processing
Creators: name: Ponhan, Kowit
Publisher: name: University of Leicester
Year: 2022
Subjects: Uncategorized

description: Magnesium metal matrix nanocomposites (Mg-MMNCs) have recently gained attention in the aerospace and automotive sectors due to their superior strength, ductility, and creep resistance compared to conventional alloys. Nevertheless, for the manufacturing of Mg-MMNCs, it is significantly challenging to distribute ceramic nanoparticles homogeneously in the molten magnesium using liquid metallurgy owing to their poor wettability and high surface-to-volume ratio. In this study, the AZ91D magnesium nanocomposite reinforced by SiC nanoparticles (1.0 wt.%) was fabricated using stir casting assisted by ultrasonic treatment. Several particle feeding techniques were developed to incorporate SiC nanoparticles into the AZ91D melt. The majority of them have been unsuccessful due to the formation of oxide layers on the melt surface and increased melt viscosity. However, a master pellet feeding technique has shown substantial potential for enhancing particle engulfment into the melt. The microstructural analysis revealed a relatively uniform distribution of the SiC nanoparticles within the AZ91D matrix. As compared to the unreinforced AZ91D alloy, the microhardness improved by 28%. Also, the yield strength, ultimate tensile strength, and elongation to fracture were simultaneously increased by 63%, 34%, and 88%, respectively. Additionally, the master pellet feeding technique was employed to produce AZ91D nanocomposites with varying SiC contents (1, 1.5, and 2 wt.%). It was found that increasing SiC concentration improved the grain refinement, particle distribution, and tensile properties of the composites. However, when the SiC content was increased to 2.0 wt.%, the tensile properties considerably decreased because of the higher porosity content and particle clusters in the microstructure. Moreover, the as-cast AZ91D/1.0 wt.% SiC nanocomposite was heat-treated to improve its quality and properties. The findings indicated that T6 heat treatment considerably affected the microstructure of the composite, leading to an increase in hardness and tensile properties compared to the composite without heat treatment.