cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Extended Klein-Gordon Action, Gravity and Non-Relativistic Fluid
Creators: name: Hassaine, Mokhtar
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a scalar field action for which the Lagrangian density is a power of the massless Klein-Gordon Lagrangian. The coupling of gravity to this matter action is considered. In this case, we show the existence of nontrivial scalar field configurations with vanishing energy-momentum tensor on any static, spherically symmetric vacuum solutions of the Einstein equations. These configurations in spite of being coupled to gravity do not affect the curvature of spacetime. The properties of this particular matter action are also analyzed. For a particular value of the exponent, the extended Klein-Gordon action is shown to exhibit a conformal invariance without requiring the introduction of a nonminimal coupling. We also establish a correspondence between this action and a non-relativistic isentropic fluid in one fewer dimension. This fluid can be identified with the (generalized) Chaplygin gas for a particular value of the power. It is also shown that the non-relativistic fluid admits, apart from the Galileo symmetry, an additional symmetry whose action is a rescaling of the time.
description: 7 pages, two columns. Minor changes
Negative differential conductance in quantum dots in theory and experiment
Creators: name: Rogge, M. C.
name: Cavaliere, F.
name: Sassetti, M.
name: Haug, R. J.
name: Kramer, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Experimental results for sequential transport through a lateral quantum dot in the regime of spin blockade induced by spin dependent tunneling are compared with theoretical results obtained by solving a master equation for independent electrons. Orbital and spin effects in electron tunneling in the presence of a perpendicular magnetic field are identified and discussed in terms of the Fock-Darwin spectrum with spin. In the nonlinear regime, a regular pattern of negative differential conductances is observed. Electrical asymmetries in tunnel rates and capacitances must be introduced in order to account for the experimental findings. Fast relaxation of the excited states in the quantum dot have to be assumed, in order to explain the absence of certain structures in the transport spectra.
description: 4 pages, 4 figures
Το Brand ως περιουσιακό στοιχείο της επιχείρησης. Μέθοδοι αποτίμησης και το ανταγωνιστικό πλεονέκτημα ισχυρού Brand.
Creators: name: Δημοπούλου, Αναστασία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Brand
subject: Αποτίμηση
subject: Brand name
subject: Εμπορικά σήματα
subject: Περιουσιακά στοιχεία
subject: Σήματα

description: Το εμπορικό σήμα (brand), στη σύγχρονη εποχή, αποτελεί ένα από τα σημαντικότερα και πολυτιμότερα άυλα περιουσιακά στοιχεία μιας οικονομικής οντότητας. Ο στόχος της παρούσας διπλωματικής εργασίας είναι να διερευνήσει σε βάθος την έννοια του εμπορικού σήματος και της αξίας του, τόσο από την σκοπιά των καταναλωτών, όσο και από τη χρηματοοικονομική σκοπιά. Για την εξυπηρέτηση των σκοπών της εργασίας διενεργήθηκε έρευνα αγοράς σχετικά με την σημασία του brand ως παράγοντα που επηρεάζει την αγοραστική απόφαση και επιλογή των καταναλωτών, ειδικότερα για τον κλάδο των έξυπνων κινητών τηλεφώνων. Επιπλέον, παρουσιάζονται οι κυριότερες προσεγγίσεις και μέθοδοι χρηματικής αποτίμησης των εμπορικών σημάτων και πραγματοποιήθηκε η χρηματική αποτίμηση του brand ΟΤΕ-COSMOTE. Τέλος, γίνεται αναφορά σε πρόσφατες έρευνες που δημοσιεύτηκαν σχετικά με την αξία του εμπορικού σήματος και των παραγόντων που την καθορίζουν, με σκοπό την ευρύτερη κατανόηση της έννοιας του brand και των στοιχείων που επηρεάζουν την αξία που αυτό έχει για τους καταναλωτές αλλά και για τις επιχειρήσεις.
Virtual dual inhibition of COX-2 / 5-LOX enzymes based on binding properties of alpha-amyrins, the anti-inflammatory compound as a promising anti-cancer drug
Creators: name: Ranjbar, Mohammad Mehdi
name: Assadolahi, Vahideh
name: Yazdani, Mohsen
name: Nikaein, Donya
name: Rashidieh, Behnam
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: drug discovery
subject: α-amyrins
subject: anti cancer drug
subject: Cyclooxygenase-2 (COX2)
subject: 5-Lipooxygenase (5-LOX)
subject: 610

description: Hydro-alcoholic fruit extract of Cordia myxa was considerably effective on curing acute inflammation in mouse model. Previous studies suggested significant anti-inflammatory activities as well as potential anticancer agent of α-amyrins in seeds. Inhibition of Cyclooxygenase-2 (COX-2) and 5-Lipooxygenase (5-LOX) is significant in cancer prevention and therapeutics although this inhibition with chemo-drugs has its own side-effects. It is shown that these enzymes pathways are related to several cancers including colon, breast and lung cancer. This study was conducted based on Cordia species’ α-amyrins as a safer natural anti-cancer compound for inhibition of COX-2 and 5-LOX enzymes by molecular docking. The X-ray crystal structure of COX2 / 5-LOX enzymes and α-amyrins was retrieved and energetically minimized respectively. The binding site and surface of enzymes were detected. Docking studies were performed by AutoDock 4.2 using Lamarckian genetic algorithm (LGA). Finally drug likeness, molecular pharmacokinetic properties and toxicity of α-amyrins was calculated. Molecular Docking revealed hydrogen and hydrophobic interactions between α-amyrins with both active sites of COX-2 and 5-LOX enzymes. Interestingly, it covalently bonded to Fe cofactor of 5-LOX enzyme and chelated this molecule. Base on binding energies (ΔG) α-amyrin has more inhibitory effects on 5-LOX (-10.45 Kcal/mol) than COX-2 (-8.02 Kcal/mol). Analysis of molecular pharmacokinetic parameters suggested that α-amyrins complied with most sets of Lipinski's rules, and so it could be a suitable ligand for docking studies. Eventually, bioactivity score showed α-amyrins possess considerable biological activities as nuclear receptor, enzyme inhibitor, GPCR and protease inhibitor ligand. These results clearly demonstrate that α-amyrins could act as potential highly selective COX-/5-LOX inhibitor. Also, it is a safe compound in comparison with classical non-steroidal antiinflammatory drugs (NSAIDs) that are known as cancer preventive agents, since it is free of side effects on human body and it can be a promising drug for cancer therapeutics.
description: EXCLI Journal;Vol. 15, 2016
ESM for Olsson et al. ‘Trophic guilds of suction-feeding fish are distinguished by their characteristic hydrodynamics of swimming and feeding.’
Creators: name: Olsson, Karin H.
name: Gurka, Roi
name: Holzman, Roi
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Description of the data collection method, feeding guild assignation, table of data and sources, and result from models fitted to length data and models fitted to alternative feeding guild assignations.
Larvicidal activity and structure activity relationship of cinnamoyl amides from Zanthoxylum armatum and their synthetic analogues against diamondback moth, Plutella xylostella
Creators: name: Kumar, Vishal
name: Reddy, S. G. Eswara
name: Bhardwaj, Anuja
name: Dolma, Shudh Kirti
name: Kumar, Neeraj
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: cinnamoyl amides
subject: structure activity relationship
subject: larvicidal activity
subject: Plutella xylostella
subject: 610

description: Cinnamoyl amides isolated from Zanthoxylum armatum (Rutaceae) and their synthetic analogues were tested for their insecticidal activity against the second instar larvae of diamondback moth, Plutella xylostella (L.) (Lepidoptera: Yponomeutidae) to determine the promising structures with insecticidal activity. Most of the test compounds showed promising activity against larvae of P. xylostella. However, the activities of different compounds varied depending on the presence of different substituents at various positions of both the aromatic rings A and B. Among the tested compounds, 8, N-(3-bromo-4-methoxyphenethyl)cinnamamide showed best larvicidal activity with an LC50 = 62.13 mg/L followed by 6, N-(3 ׳-bromophenethyl)cinnamamide (LC50=128.49 mg/L) and 2 N-(4 ׳-methoxyphenylethyl)cinnamamide (LC50 = 225.65 mg/L).
description: EXCLI Journal;Vol. 15, 2016
Η αναγκαιότητα ανάπτυξης των διευθυντικών στελεχών των εκπαιδευτικών μονάδων της Β΄ βάθμιας εκπαίδευσης. Μια εμπειρική μελέτη: οι στάσεις - αντιλήψεις των διευθυντικών στελεχών των σχολικών μονάδων της Β΄ βάθμιας εκπαίδευσης της Β΄ Αθήνας
Creators: name: Ανδρής, Ευστάθιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Διοικητική επιμόρφωση
subject: Διευθυντές
subject: Δευτεροβάθμια εκπαίδευση

description: Σκοπός της παρούσας διατριβής ήταν να διερευνήσει την αναγκαιότητα ανάπτυξης διευθυντικών στελεχών των εκπαιδευτικών μονάδων στην Ελλάδα. Για αυτό τον σκοπό ερωτηματολόγια διανεμήθηκαν σε 90 διευθυντές σχολικών μονάδων δευτεροβάθμιας εκπαίδευσης της Β΄ Αθήνας. Η στατιστική ανάλυση των δεδομένων έγινε με το SPSS. Χρησιμοποιήθηκαν περιγραφικά μέτρα, παραμετρικά τεστ και ανάλυση συσχετίσεων. Τα αποτελέσματα της έρευνας πρώτον έδειξαν ότι τα διευθυντικά στελέχη δευτεροβάθμιας εκπαίδευσης της Δ/νσης Δευτεροβάθμιας Εκπ/σης Β΄ Αθήνας έχουν ιδιαίτερα θετικές στάσεις και αντιλήψεις σχετικά με τη διοικητική επιμόρφωση. Την αντιμετωπίζουν ως μια διαδικασία που θα τους βοηθήσει σημαντικά στην άσκηση των διοικητικών τους καθηκόντων και στη βελτίωση της συνολικής αποτελεσματικότητας και λειτουργίας της σχολικής μονάδας. Παράλληλα, σημαντική είναι η συμβολή της στην επίλυση καθημερινών προβλημάτων στο σχολείο. Για αυτόν τον λόγο θεωρούν ως απαραίτητη διαδικασία τη μετεκπαίδευση σε θέματα διοίκησης της σχολικής μονάδας πριν από την επιλογή τους ως διευθυντικά στελέχη. Τα επιμορφωτικά αυτά προγράμματα πρέπει να εστιάζουν στη ανάπτυξη δεξιοτήτων όπως: α) οργανωτικά και διοικητικά θέματα, β) επικοινωνιακές δεξιότητες και γ) ενίσχυση της συναισθηματικής νοημοσύνης, δ) ηγετικές δεξιότητες. Επίσης βρέθηκε ότι τα δημογραφικά χαρακτηριστικά των διευθυντών επηρέασαν σε μικρό βαθμό τις στάσεις τους και τις αντιλήψεις τους σχετικά με τη διοικητική επιμόρφωση. Πιο συγκεκριμένα, στατιστικά σημαντικές διαφορές παρατηρήθηκαν με βάση το φύλο και την ηλικία. Αντίθετα, η οικογενειακή κατάσταση, τα έτη προϋπηρεσίας και το εκπαιδευτικό επίπεδο δεν επηρέασαν τις απαντήσεις των συμμετεχόντων. Τέλος, ένα ακόμα στοιχείο που υπογραμμίζει τη σημασία της διοικητικής επιμόρφωσης είναι ότι η ικανοποίηση των διευθυντών από την άσκηση των καθηκόντων τους σχετίζεται θετικά με το επίπεδο της διοικητικής τους κατάρτισης καθώς και με την παρακολούθηση επιμορφωτικών προγραμμάτων σχετικά με τη σχολική διοίκηση. Εν κατακλείδι, η παρούσα διατριβή ανέδειξε τη σημαντικότητα της ανάπτυξης των διοικητικών δεξιοτήτων των διευθυντών των σχολικών μονάδων της δευτεροβάθμιας εκπαίδευσης στην Ελλάδα. Οι ιδιαίτερα θετικές στάσεις των διευθυντών απέναντι στη διοικητική επιμόρφωση αποτελούν ένα κρίσιμο παράγοντα προς αξιοποίηση από την πλευρά των εκπαιδευτικών φορέων. Σε αυτό το πλαίσιο, κρίνεται απαραίτητη η οργάνωση επιμορφωτικών προγραμμάτων από την πλευρά του υπουργείου με στόχο να αναπτύξει και να αξιοποιήσει τους διαθέσιμους και δυναμικούς ανθρώπινους πόρους του εγχώριου εκπαιδευτικού συστήματος.
Multi-criteria optimisation problems for chemical engineering systems and algorithms for their solution based on fuzzy mathematical methods
Creators: name: Orazbayev, B. B.
name: Orazbayeva, K. N.
name: Kurmangaziyeva, L. T.
name: Makhatova, V. E.
Publisher: name: Technische Universität Dortmund
Year: 2015
Subjects: subject: multi-criteria optimisation
subject: optimisation principles
subject: benzene production
subject: the task of fuzzy mathematical programming
subject: 610

description: Mathematical equations for the multi-criteria task of the optimisation of chemical engineering systems, for example for the optimisation of working regimes for industrial installations for benzene production, have been formulated and developed, and based on fuzzy mathematical methods, algorithms for their solution have been developed. Since the chemical engineering system, which is being researched, is characterised by multiple criteria and often functions in conditions of uncertainty, the presenting problem is formulated in the form of multicriteria equations for fuzzy mathematical programming. New mathematical formulations for the problems being solved in a fuzzy environment and heuristic algorithms for their solution have been developed by the modification of various optimisation principles based on fuzzy mathematical methods.
description: EXCLI Journal;Vol. 14, 2015
Formation of sdB-stars via common envelope ejection by substellar companions
Creators: name: Kramer, M.
name: Schneider, F. R. N.
name: Ohlmann, S. T.
name: Geier, S.
name: Schaffenroth, V.
name: Pakmor, R.
name: Roepke, F. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Common envelope (CE) phases in binary systems where the primary star reaches the tip of the red giant branch are discussed as a formation scenario for hot subluminous B-type (sdB) stars. For some of these objects, observations point to very low-mass companions. In hydrodynamical CE simulations with the moving-mesh code AREPO, we test whether low-mass objects can successfully unbind the envelope. The success of envelope removal in our simulations critically depends on whether or not the ionization energy released by recombination processes in the expanding material is taken into account. If this energy is thermalized locally, envelope ejection eventually leading to the formation of an sdB star is possible with companion masses down to the brown dwarf range. For even lower companion masses approaching the regime of giant planets, however, envelope removal becomes increasingly difficult or impossible to achieve. Our results are consistent with current observational constraints on companion masses of sdB stars. Based on a semianalytic model, we suggest a new criterion for the lowest companion mass that is capable of triggering a dynamical response of the primary star thus potentially facilitating the ejection of a common envelope. This gives an estimate consistent with the findings of our hydrodynamical simulations.
description: 12 pages, 8 figures, 3 tables; submitted to A&A
Non-BPS Dp-Brane in Dk-Brane Background
Creators: name: Kluson, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we will study the dynamics of a non-BPS Dp-brane in the background of N BPS Dk-branes.
description: 23 pages,typos fixed,discussion in section devoted to the time dependent tachyon condensation corrected
title: Εξ αποστάσεως εκπαίδευση. Μια νέα πραγματικότητα στην εκπαιδευτική διαδικασία
title: Distance education. A new reality in the educational process
titleType: AlternativeTitle
Creators: name: Μωυσή, Νινέτα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Εκπαίδευση από απόσταση
subject: Νέες τεχνολογίες
subject: Διαδίκτυο (Internet)
subject: Σύγχρονη και ασύγχρονη εκπαίδευση

description: Η αναβάθμιση και βελτίωση της εκπαίδευσης που παρέχεται στους κόλπους της δευτεροβάθμιας εκπαίδευσης αποτελεί διαχρονικά έναν από τους στρατηγικούς στόχους της εκάστοτε κυβέρνησης, γεγονός που αποτυπώνεται στις εκπαιδευτικές μεταρρυθμίσεις που προωθούνται κατά καιρούς. Στο πλαίσιο αυτό επιδιώκεται η υιοθέτηση μιας εναλλακτικής μορφής εκπαίδευσης, η οποία παρέχεται με τη χρήση των νέων τεχνολογιών, η εξ αποστάσεως εκπαίδευση. Στην παρούσα εργασία επιχειρείται, μέσα από τη βιβλιογραφική επισκόπηση, να αποσαφηνιστούν έννοιες που σχετίζονται με την εξ αποστάσεως εκπαίδευση, να αναδειχθεί η εξέλιξη, οι μορφές της, η υφιστάμενη τεχνολογία, ακόμα οι δυνατότητες και οι παράγοντες ενσωμάτωσής της στην εκπαιδευτική διαδικασία, καθώς και τα πλεονεκτήματα και μειονεκτήματά της. Παράλληλα, η ερευνητική προσπάθεια αποσκοπεί στη διερεύνηση των αντιλήψεων των εκπαιδευτικών της δευτεροβάθμιας εκπαίδευσης αναφορικά με την αναγκαιότητα, τη χρησιμότητα και την αποτελεσματικότητα της ενσωμάτωσης της εξ αποστάσεως εκπαίδευσης. Η έρευνα βασίστηκε στη χρήση ερωτηματολογίου σε δείγμα 120 εκπαιδευτικών. Βασικά συμπεράσματα που προέκυψαν είναι ότι η συμβολή της εξΑΕ στην εκπαιδευτική διαδικασία είναι σημαντική και ο ρόλος της στον εμπλουτισμό της παραδοσιακής διά ζώσης διδασκαλίας είναι πολύτιμος. Ωστόσο, απαιτούνται ακόμα προσπάθειες από όλες τις πλευρές, της πολιτείας, των εκπαιδευτικών, των μαθητών/τριών, ώστε η ενσωμάτωσή της να υλοποιηθεί με επιτυχία.
Trans-1,3-diphenyl-2,3-epoxypropan-1-one, a chalcone derivative, induces apoptosis via ROS-mediated down-regulation of Bcl-xL in human leukemia HL-60 cells
Creators: name: Ko, Eun-Yi
name: Lee, Seung-Hong
name: Ko, Ji-Yeon
name: Moon, Jeong Yong
name: Yoon, Weon-Jong
name: Ahn, Ginnae
name: Roh, Seong Woon
name: Cho, Kichul
name: Jeon, You-Jin
name: Kim, Daekyung
name: Kim, Kil-Nam
Publisher: name: Technische Universität Dortmund
Year: 2015
Subjects: subject: anticancer
subject: trans-1,3-diphenyl-2,3-epoxypropan-1-one (DPEP)
subject: apoptosis
subject: reactive oxygen species (ROS)
subject: Bcl-xL
subject: 610

description: The anticancer effects of trans-1,3-diphenyl-2,3-epoxypropan-1-one (DPEP), a chalcone derivative, were investigated in human leukemia HL-60 cells. Treatment of HL-60 cells with various concentration of DPEP resulted in a sequence of events characteristic of apoptosis, including loss of cell viability, morphological changes, and increased sub-G1 DNA content. We demonstrated that DPEP elevates reactive oxygen species (ROS) levels in HL-60 cells, and that the ROS scavenger N-acetylcysteine (NAC) could block DPEP-induced ROS generation and apoptosis. Western blot analysis revealed that DPEP inhibits Bcl-xL expression, leading to caspase-3 activation and poly-ADP-ribose polymerase (PARP) cleavage, thereby inducing apoptosis. However, NAC pretreatment significantly inhibited the activation of caspase-3 and PARP cleavage and reduced Bcl-xL levels. These findings provide the first evidence that DPEP may inhibit the growth of HL-60 cells and induce apoptosis through a ROS-mediated Bcl-xL pathway.
description: EXCLI Journal;Vol. 14, 2015
Transitivity properties for group actions on buildings
Creators: name: Abramenko, Peter
name: Brown, Kenneth S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E42 (primary); 20G25, 51E24, 20E08 (secondary)

description: We study two transitivity properties for group actions on buildings, called Weyl transitivity and strong transitivity. Following hints by Tits, we give examples involving anisotropic algebraic groups to show that strong transitivity is strictly stronger than Weyl transitivity. A surprising feature of the examples is that strong transitivity holds more often than expected.
description: 9 pages; corrections to bibliography
Full replica symmetry breaking in generalized mean--field spin glasses with reflection symmetry
Creators: name: Schelkacheva, T. I.
name: Tareyeva, E. E.
name: Chtchelkachev, \and N. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The analysis of the solution with full replica symmetry breaking in the vicinity of $T_c$ of a general spin glass model with reflection symmetry is performed. The leading term in the order parameter function expansion is obtained. Parisi equation for the model is written.
description: 9 pages, 2 figures
Slow Spin Relaxation in Single Endohedral Fullerene Molecules
Creators: name: Li, Jie
name: Gu, Lei
name: Wu, Ruqian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Well-protected magnetization, tunable quantum states and long coherence time are desired for the use of magnetic molecules in spintronics and quantum information technologies. In this work, endohedral fullerene molecules M@C28 with different transition metal cores were explored through systematic first-principles calculations and spin dynamics analyses. Many of them have stable magnetization, giant magnetic anisotropy energy and bias-tunable structure. In particular, some of them may have coherence time up to several milliseconds for their quantum spin states at high temperature (~10K) after full consideration of spin-vibration couplings. These results suggest that these M@C28 provide a rich pool for the development of single-molecule magnets, magnetic molecular junctions, and molecular qubits.
Selected novel 5'-amino-2'-hydroxy-1,3-diaryl-2-propen-1-ones arrest cell cycle of HCT-116 in G0/G1 phase
Creators: name: Simon, Lalitha
name: Srinivasan, K. K.
name: Kumar, Nitesh
name: Reddy, Neetinkumar D.
name: Biswas, Subhankar
name: Rao, C. Mallikarjuna
name: Moorkoth, Sudheer
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: 5’-amino-2’-hydroxy-1,3-diaryl-2-propen-1-ones
subject: cytotoxicity
subject: MTT
subject: acridine orange-ethidium bromide nuclear staining
subject: flow cytometry
subject: 610

description: A series of 5’-amino-2’-hydroxy-1,3-diaryl-2-propen-1-ones (AC1-AC15) were synthesized by Claisen-Schmidt condensation of 5'-acetamido-2’-hydroxy acetophenone with various substituted aromatic aldehydes. The synthesized compounds were characterized by FTIR, 1H NMR and mass spectrometry and evaluated for their selective cytotoxicity using MTT assay on two cancer cell lines namely breast cancer cell line (MCF-7), colon cancer cell line (HCT-116) and one normal kidney epithelial cell line (Vero). Among the tested compounds, AC-10 showed maximum cytotoxic effect on MCF-7 cell line with IC50 value 74.7 ± 3.5 μM. On HCT-116 cells, AC-13 exhibited maximum cytotoxicity with IC50 value 42.1 ± 4.0 μM followed by AC-14 and AC-10 with IC50 values 62 ± 2.3 μM and 95.4 ± 1.7 μM respectively. All tested compounds were found to be safe on Vero cell line with IC50 value more than 200 μM. Based on their highest efficacy on HCT-116, AC-10, AC-13 and AC-14 were selected for mechanistic study on this cell line by evaluating changes nucleomorphological characteristics using acridine orange-ethidium bromide (AOEB) dual stain and by analyzing cell cycle with flow cytometry using propidium iodide stain. In AOEB staining, all three tested compounds showed significant (p < 0.05) increase in percentage apoptotic nuclei compared to control cells, with highest increase in apoptotic nuclei by AC-13 treatment (31 %). Flow cytometric studies showed cell cycle arrest by AC-10 and AC-14 treatment in G0/G1 phase and by AC-13 in G0/G1 and G2/M phase. The study reflected the potential of AC-10, AC-13 and AC-14 to be the lead molecules for further optimization.
description: EXCLI Journal;Vol. 15, 2016
Raciological thought in Victorian culture : a study in imperial dissemination
Creators: name: O'Leary, Daniel Ralph J.
Publisher: name: University of British Columbia
Year: 2009

description: My thesis revives the term raciology to describe collectively the literature which emanated out of philological ethnology, that is, out of the studies of man inspired by the rapid advances in linguistic science in the early nineteeenth century. Raciological Thought in Victorian Culture is divided into two parts: it examines the development and dissemination of nineteenth-century raciological knowledge in the works of celebrated philologists and anthropologists; and then investigates typical features of raciological discourse in Victorian and Victorian Canadian culture. It views this regional British literature as a field for the political and educational deployment of British raciological conceptions, and comments on some of the implications of the circulation of raciological doctrine. My argument begins with discussion of the often overlooked celebrity and authority of philologists in Victorian culture, tracing the derivation from philology of raciological typologies which established the raciological associations of terms like "Britons," "Anglo-Saxons," and "Teutons" during the early and middle-Victorian periods. An important aspect of the thesis is a re-evaluation of the influence of Friedrich Max Muller, the most influential comparative philologist and mythologist in the Victorian world. I argue that his use of etymological study for archaeological data greatly contributed to the rapid dissemination of raciological thought among the educated and educating classes. The first part of the thesis concludes with discussion of issues which animated raciological discourse. The second part follows the dissemination of Victorian raciological thought to Canada, and illustrates its effects in an imperial context. It demonstrates the use of raciology in establishing Canada's legitimacy as a British nation, and documents the place of raciology in establishing the authenticity of Canadian continuity with a British culture running into deep antiquity. After discussing neglected raciological aspects of several important Victorian Canadian source works, it goes on to outline the importance of raciological mythology to the preservation of the Dominion from American annexation and Fenian incursion. My epilogue briefly documents the decline of raciological thought in Britain after the 1890s. By investigating numerous neglected Victorian sources, Raciological Thought in Victorian Culture establishes raciology as an important element in Victorian political-and, in particular, nationalist-thinking.
H επίδραση της εφαρμoγής τoυ συστήματoς περιβαλλoντικής διαχείρισης (ISO 14001:2015) στηv αvάπτυξη μιας βιώσιμης εφoδιαστικής αλυσίδας
Creators: name: Τσιτούρας, Αθανάσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Supply chain
subject: Logistics
subject: Sustainability
subject: ISO 14001 Standard
subject: Αειφορία
subject: Βιωσιμότητα
subject: Εφοδιαστική αλυσίδα
subject: Σύστημα περιβαλλοντικής διαχείρισης

description: H παρoύσα μεταπτυχιακή διατριβή αvαφέρεται στη μελέτη της επίδρασης τoυ συστήματoς περιβαλλoντικής διαχείρισης ISO 14001:2015 στηv εφoδιαστική αλυσίδα μιας κατασκευαστικής εταιρείας. Για τo σκoπό αυτό έγιvε εκτεvής αvαφoρά σε βασικές αρχές και έννoιες πoυ αφoρoύv τηv αειφoρία, τηv εφoδιαστική αλυσίδα και τo σύστημα περιβαλλoντικής διαχείρισης. Συγκεκριμέvα εξετάστηκε o περιβαλλoντικός πυλώvας της αειφoρίας μιας εταιρείας σε τoμείς της αλυσίδας εφoδιασμoύ όπως η απoθήκευση, η παραγωγή, oι πρoμήθειες και η διανoμή.
Serial measurement of lipid profile and inflammatory markers in patients with acute myocardial infarction
Creators: name: Shrivastava, Amit Kumar
name: Singh, Harsh Vardhan
name: Raizada, Arun
name: Singh, Sanjeev Kumar
Publisher: name: Technische Universität Dortmund
Year: 2015
Subjects: subject: acute myocardial infarction
subject: lipid profile
subject: inflammatory markers
subject: serial measurement
subject: 610

description: Serum concentration of lipids and lipoproteins changes during the course of acute coronary syndrome as a consequence of the inflammatory response. The objective of this study was to evaluate the effect of acute myocardial infarction (AMI) on the levels of lipid profile and inflammatory markers. We investigated 400 patients with AMI who were admitted within 24 h of onset of symptoms. Serum levels of total cholesterol (TC), triglyceride (TG), low density lipoprotein (LDL) and high density lipoprotein (HDL) were determined by standard enzymatic methods along with high sensitive C-reactive protein (hs-CRP) (latex enhanced immunoturbidimetric assay) and cytokines, interleukin (IL)-6 and IL-10 (quantitative ‘‘sandwich’’ enzyme-linked immunosorbent assay). The results indicate a trend of reduced TC, LDL, and HDL, and elevated TG levels, along with pro- and anti-inflammatory markers (p < 0.001), between day 1 and the day 2 serum samples of AMI patients. However, corrections in the serum levels have been observed at day 7. Our results demonstrate significant variations in the mean lipid levels and inflammatory markers between days 1, 2 and 7 after AMI. Therefore, it is recommended that the serum lipids should be assessed within 24 hours after infarction. Early treatment of hyperlipidemia provides potential benefits. Exact knowledge regarding baseline serum lipids and lipoprotein levels as well as their varying characteristics can provide a rational basis for clinical decisions about lipid lowering therapy.
description: EXCLI Journal;Vol. 14, 2015
Η επίδραση των εξόδων έρευνας και ανάπτυξης στην εταιρική απόδοση
Creators: name: Συγλέτου, Ευαγγελία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Κεφαλαιοποίηση
subject: Κερδοφορία
subject: Δαπάνες έρευνας και ανάπτυξης
subject: Λειτουργική απόδοση
subject: Χειραγώγηση κερδών
subject: Εξομάλυνση κερδών

description: Βασικό ερώτημα της παρούσης εργασίας αποτελεί η επίδραση των εξόδων έρευνας και ανάπτυξης και η εταιρική απόδοση. Για να απαντηθεί το βασικό ερώτημα, θα πρέπει να χωρισθεί σε δύο επιμέρους ερωτήματα. Πρώτον, τι επηρεάζει την κεφαλαιοποίηση των δαπανών για ανάπτυξη, δηλαδή ποιοι είναι οι προσδιοριστικοί παράγοντες της κεφαλαιοποίησης. Το δεύτερο ερώτημα που πρέπει να διερευνηθεί, είναι το πώς επηρεάζεται η μελλοντική λειτουργική απόδοση της εταιρείας από την κεφαλαιοποίηση δαπανών για ανάπτυξη. Τα δύο ερωτήματα είναι συνδεδεμένα, και μάλιστα πρέπει να απαντηθούν διαδοχικά. Στη μελέτη χρησιμοποιείται η μέθοδος του Heckman βάσει της οποίας σε πρώτο στάδιο εκτιμάται ένα probit μοντέλο. Από την ανάλυση διαπιστώθηκε ότι βασικοί προσδιοριστικοί παράγοντες της κεφαλαιοποίησης είναι το μέγεθος των εταιρειών καθώς και το ότι οι εταιρείες χρησιμοποιούν την κεφαλαιοποίηση για να κάνουν smooth earnings. Εν συνεχεία, αφού από το probit μοντέλο υπολογίσουμε το Inverse Mills Ratio, εκτιμάμε ένα μοντέλο μελλοντικής εταιρικής απόδοσης εφαρμόζοντας την εξίσωση με Fixed Effects Regression. Με βάση την ανάλυση αυτού του μοντέλου συμπεραίνουμε ότι η μελλοντική λειτουργική απόδοση της επιχείρησης δεν επηρεάζεται από την κεφαλαιοποίηση δαπανών αλλά από τα έξοδα για έρευνα και ανάπτυξη που δηλώνονται στην ΚΑΧ. Αυτό οδηγεί στη διαπίστωση ότι η κεφαλαιοποίηση των δαπανών για ανάπτυξη δεν μπορεί να αποτελέσει ένα “signal” για τη μελλοντική λειτουργική απόδοση της επιχείρησης. Για την παραπάνω ανάλυση χρησιμοποιήθηκε ένα δείγμα 1,129 εισηγμένων στο χρηματιστήριο εταιρειών που ανήκουν σε χώρες της ζώνης του ευρώ. Η χρονική περίοδος που αναλύθηκε περιλαμβάνει τα έτη από 2005 (χρονιά υποχρεωτικής υιοθέτησης των IFRS από εισηγμένες εταιρείες) έως το 2018. Η στατιστική και οικονομετρική ανάλυση πραγματοποιήθηκε με τη χρήση λογισμικού STATA 15.0.
Effects of initial density profiles on massive star cluster formation in giant molecular clouds
Creators: name: Chen, Yingtian
name: Li, Hui
name: Vogelsberger, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform a suite of hydrodynamic simulations to investigate how initial density profiles of giant molecular clouds (GMCs) affect their subsequent evolution. We find that the star formation duration and integrated star formation efficiency of the whole clouds are not sensitive to the choice of different profiles but are mainly controlled by the interplay between gravitational collapse and stellar feedback. Despite this similarity, GMCs with different profiles show dramatically different modes of star formation. For shallower profiles, GMCs first fragment into many self-gravitation cores and form sub-clusters that distributed throughout the entire clouds. These sub-clusters are later assembled ``hierarchically'' to central clusters. In contrast, for steeper profiles, a massive cluster is quickly formed at the center of the cloud and then gradually grows its mass via gas accretion. Consequently, central clusters that emerged from clouds with shallower profiles are less massive and show less rotation than those with the steeper profiles. This is because 1) a significant fraction of mass and angular momentum in shallower profiles is stored in the orbital motion of the sub-clusters that are not able to merge into the central clusters 2) frequent hierarchical mergers in the shallower profiles lead to further losses of mass and angular momentum via violent relaxation and tidal disruption. Encouragingly, the degree of cluster rotations in steeper profiles is consistent with recent observations of young and intermediate-age clusters. We speculate that rotating globular clusters are likely formed via an ``accretion'' mode from centrally-concentrated clouds in the early Universe.
description: 13 pages, 10 figures, MNRAS submitted. Comments welcome
The unitary-model-operator approach to nuclear many-body problems
Creators: name: Fujii, S.
name: Okamoto, R.
name: Suzuki, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Microscopic nuclear structure calculations have been performed within the framework of the unitary-model-operator approach. Ground-state and single-particle energies are calculated for nuclei around ^{14}C, ^{16}O and ^{40}Ca with modern nucleon-nucleon interactions.
description: 6 pages, 4 figures, Talk presented at the International Symposium on Correlation Dynamics in Nuclei (CDN05), Jan. 1 - Feb. 4, 2005, Tokyo, Japan
Isolation, characterization and hypolipidemic activity of ferulic acid in high-fat-diet-induced hyperlipidemia in laboratory rats
Creators: name: Jain, Pankaj G.
name: Surana, Sanjay J.
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: Prosopis cineraria
subject: column chromatography
subject: oxidative stress
subject: nitric oxide
subject: lipid profile
subject: 610

description: Prosopis cineraria (L.) Druce (Leguminosae) (syn. Prosopis spicigera L.) has antidiabetic and antioxidant potential. Earlier we reported its hypolipidemic activity obtained from ethanol extract (ET-PCF). Object of this work was to isolate ferulic acid (FA) from ET-PCF and evaluate hypolipidemic activity against high-fat diet (HFD)-induced hyperlipidemic laboratory rats. ET-PCF was subjected to flash column chromatography to isolate FA. The chemical structure of the isolated compound was elucidated by UV, IR, 1H NMR,13C NMR and LC-MS. Further, the antihyperlipidemic effect of FA (10, 20 and 40 mg/kg, p.o.) in HFD-induced hyperlipidemic rats was investigated. Hyperlipidemia was induced in male Sprague-Dawley rats by feeding with HFD for 60 days. Lipid parameters such as total cholesterol (TC), Low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and triglycerides (TG) levels were measured in serum and hepatic tissue. Hepatic oxido-nitrosative stress (SOD, GSH, MDA and NO) were also determined. Histological evaluation of liver tissue was carried out. The structure of the isolated compound was characterized based on spectral data and confirmed as FA. HFD induced an alteration in serum, and hepatic lipid profile (triglyceride, cholesterol, HDL, and LDL) was significantly restored (p < 0.001) by administration of FA (20 and 40 mg/kg, p.o.). The elevated level of oxido-nitrosative stress in liver was significantly reduced (p < 0.001) by FA (20 and 40 mg/kg, p.o.). Histological aberration induced in the liver after HFD ingestion were restored by FA administration. Ferulic acid isolated from ET-PCF showed hypolipidemic effects in HFD-induced hyperlipidemic rats via modulation of elevated oxido-nitrosative stress.
description: EXCLI Journal;Vol. 15, 2016
MMT Spectroscopy of Lyman-alpha at z$\simeq$7: Evidence for Accelerated Reionization Around Massive Galaxies
Creators: name: Endsley, Ryan
name: Stark, Daniel P.
name: Chevallard, Jacopo
name: Charlot, Stéphane
name: Robertson, Brant
name: Bouwens, Rychard J.
name: Stefanon, Mauro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Reionization-era galaxies tend to exhibit weak Ly$α$ emission, likely reflecting attenuation from an increasingly neutral IGM. Recent observations have begun to reveal exceptions to this picture, with strong Ly$α$ emission now known in four of the most massive z=7$-$9 galaxies in the CANDELS fields, all of which also exhibit intense [OIII]$+$H$β$ emission (EW$>$800 $\mathrm{\mathring{A}}$). To better understand why Ly$α$ is anonymously strong in a subset of massive z$\simeq$7$-$9 galaxies, we have initiated an MMT/Binospec survey targeting a larger sample (N=22) of similarly luminous ($\simeq$1$-$6 L$^{\ast}_{\mathrm{UV}}$) z$\simeq$7 galaxies selected over very wide-area fields ($\sim$3 deg$^2$). We confidently ($>$7$σ$) detect Ly$α$ in 78% (7/9) of galaxies with strong [OIII]$+$H$β$ emission (EW$>$800 $\mathrm{\mathring{A}}$) as opposed to only 8% (1/12) of galaxies with more moderate (EW=200$-$800 $\mathrm{\mathring{A}}$) [OIII]$+$H$β$. We argue that the higher Ly$α$ EWs of the strong [OIII]$+$H$β$ population likely reflect enhanced ionizing photon production efficiency owing to their large sSFRs ($\gtrsim$30 Gyr$^{-1}$). We also find evidence that Ly$α$ transmission from massive galaxies declines less rapidly over $6
description: 20 pages, 11 figures. Accepted in MNRAS with minor revisions
Search for solar axions: the CAST experiment at CERN
Creators: name: Beltran, Berta
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Hypothetical axion-like particles with a two-photon interaction would be produced in the sun by the Primakoff process. In a laboratory magnetic field they would be transformed into X-rays with energies of a few keV. The CAST experiment at CERN is using a decommissioned LHC magnet as an axion helioscope in order to search for these axion-like particles. The analysis of the 2003 data has shown no signal above the background, thus implying an upper limit to the axion-photon coupling < 1.16*10^{-10} GeV^{-1} at 95% CL for m_{a}
description: 8 pages, 2 figures. To appear in the proceedings of the XXXX Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 7-11 March 2005
Effects of Electroacupuncture on Cognitive Symptoms in Major Depressive Disorder: A Pilot Study and Randomized Controlled Trial
Creators: name: boontra, yindee
name: Phanasathit, Muthita
Publisher: name: Zenodo
Year: 2024

description: The goal of this pilot Study and Randomized Controlled Trial is to investigate the impact of electroacupuncture on cognitive function, quality of life (QoL), and depression severity in patients with major depressive disorder (MDD).

 The main question[s] it aims to answer are:

•Primary : electroacupuncture has the potential to treat subjective cognitive complaints and cognitive impairment in MDD outpatients

•Secondary : electroacupuncture has the potential to treat  depressive in MDD outpatients

The 60 participants will randomly be assigned to either the treatment group or the control group in a 1:1 ratio. The treatment group will undergo electroacupuncture (EA), while the control group will receive sham acupuncture within 10 weeks peroid. Both groups will receive antidepressants with adjunctive medication (i.e., benzodiazepines, tricyclics, or antipsychotics) as the standard treatment. All participants will be assessed for executive functions and memory using specific cognitive tests, including the Trail Making Test B (TMT-B), Stroop Color and Word Test (SCWT), category delayed recall in the Alzheimer’s Disease Assessment Scale–Cognitive Subscale (ADAS-Cog), and subjective reports of concern regarding concentration, memory, problem-solving, learning, communication, and quality of life (QoL) concerns using the WHO Disability Assessment Schedule (WHODAS 2.0; sections D1.1-1.6 and H1-3), and depressive symptoms were assessed using the Thai-PHQ-9.
Genotoxic and cytotoxic action potential of Terminalia citrina, a medicinal plant of ethnopharmacological significance
Creators: name: Akhtar, Muhammad Furqan
name: Saleem, Ammara
name: Sharif, Ali
name: Akhtar, Bushra
name: Nasim, Maaz Bin
name: Peerzada, Sohaib
name: Raza, Moosa
name: Ijaz, Hira
name: Ahmed, Shoaib
name: Shabbir, Maryam
name: Ali, Sajid
name: Akbar, Zeeshan
name: Ul Hassan, Syed Saeed
Publisher: name: Technische Universität Dortmund
Year: 2016
Subjects: subject: genotoxicity
subject: mutagenicity
subject: herbs
subject: cytotoxicity
subject: alkaloids
subject: ethnomedicine
subject: 610

description: EXCLI Journal;Vol. 15, 2016
Joint cosmology and mass calibration from tSZ cluster counts and cosmic shear
Creators: name: Nicola, Andrina
name: Dunkley, Jo
name: Spergel, David N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new method for joint cosmological parameter inference and cluster mass calibration from a combination of weak lensing measurements and the abundance of thermal Sunyaev-Zel'dovich (tSZ) selected galaxy clusters. We combine cluster counts with the spherical harmonic cosmic shear power spectrum and the cross-correlation between cluster overdensity and cosmic shear. These correlations constrain the cluster mass-observable relation. We model the observables using a halo model framework, including their full non-Gaussian covariance. Forecasting constraints on cosmological and mass calibration parameters for a combination of LSST cosmic shear and Simons Observatory tSZ cluster counts, we find competitive constraints for cluster cosmology, with a factor two improvement in the dark energy figure of merit compared to LSST cosmic shear alone. We find most of the mass calibration information will be in the large and intermediate scales of the cross-correlation between cluster overdensity and cosmic shear. Finally, we find broadly comparable constraints to traditional analyses based on calibrating masses using stacked cluster lensing measurements, with the benefit of consistently accounting for the correlations with cosmic shear.
description: 23 pages, 8 figures, 2 tables, to be submitted to PRD
Εγγραμματισμός στην διαχείριση κρίσεων για θεσμούς εθνικής ασφάλειας: γνωσιακή προεργασία για ανάπτυξη διδακτικής πρότασης
Creators: name: Μπεγνή, Σοφία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2020
Subjects: subject: Κρίσεις
subject: Μέσα επικοινωνίας
subject: Διαχειριστές κρίσεων
subject: Διαχείριση κρίσεων
subject: Εγγραμματισμός στα μέσα επικοινωνίας
subject: Εκπαίδευση για τη διαχείριση κρίσεων

description: Οι κοινωνίες έρχονται αντιμέτωπες με σημαντικές απειλές και κρίσεις οι οποίες προκλήθηκαν από φυσικές καταστροφές, την κλιματική αλλαγή καθώς και την προοπτική έλλειψης πόρων ενώ αντιμετωπίζουν σημαντικές διεθνείς απειλές, όπως η άνοδος της διεθνούς τρομοκρατίας και οι επιθέσεις στον κυβερνοχώρο. Αυτά τα ακραία γεγονότα και οι αυξανόμενες απειλές δημιουργούν ένα παγκόσμιο τοπίο πολυπλοκότητας και αβεβαιότητας στα μέλη μιας κοινωνίας. Κατά συνέπεια, είναι ευθύνη των αρμόδιων φορέων κάθε κράτους – των διαχειριστών κρίσεων να αναπτύξουν στρατηγικές για την πρόβλεψη, τον μετριασμό και την αντιμετώπιση των κρίσεων. Τα Μέσα επικοινωνίας συνιστούν ρυθμιστικό παράγοντα της κρίσης. Οριοθετούν το συμβολικό περιβάλλον γύρω από μία κατάσταση, ώστε αυτή να γίνεται αντιληπτή από την κοινή γνώμη ως υψηλής, χαμηλής ή μέτριας έντασης κρίση ή η κατάσταση αυτή να μην νοείται ως κρίση. Το πεδίο του Εγγραμματισμού στα Μέσα Επικοινωνίας μπορεί να συμβάλλει σε μια πιο αποτελεσματική διαχείριση των κρίσεων. Η εκπαίδευση είναι ένας ουσιαστικός παράγοντας στον Εγγραμματισμό των Μέσων, καθώς δίνεται η ευκαιρία μέσω της εκπαίδευσης στα Μέσα Επικοινωνίας να καταστούν οι διαχειριστές κρίσεων ικανοί να ανταπεξέλθουν σε οποιαδήποτε μορφής ή έντασης κρίση. Αντιμετωπίζοντας διάφορους τύπους κρίσεων κάθε κυβέρνηση χρειάζεται διαφορετικές στρατηγικές ανάλογα με τα ζητήματα που καλείται να ανταπεξέλθει. Η τρέχουσα μελέτη αφορά τη διαχείριση κρίσεων σε θέματα εθνικής ασφάλειας και ταυτόχρονα εξηγεί το ρόλο που μπορεί να διαδραματίσει ο Εγγραμματισμός των Μέσων Επικοινωνίας στη διαχείριση ζητημάτων επικοινωνιακής κρίσης που αφορούν την εθνική ασφάλεια μιας χώρας. Ο στόχος της παρούσας έρευνας είναι να αποσαφηνιστεί ο άξονας από την τριγωνική σχέση Εγγραμματισμός στα Μέσα Επικοινωνίας – Διαχείριση Κρίσεων – Εκπαίδευση για τη Διαχείριση Κρίσεων. Πιο συγκεκριμένα, εξετάζεται το πεδίο του Εγγραμματισμού στα Μέσα Επικοινωνίας και διερευνάται το πως μπορούν να αναπτυχθούν οι κατάλληλοι συσχετισμοί του με την Εκπαίδευση στην Διαχείριση Κρίσεων. Η μελέτη χωρίζεται σε τρία κεφάλαια. Σε κάθε κεφάλαιο επιχειρείται η ανάδειξη των διασυνδέσεων μέσα από την συστηματική κι εστιασμένη βιβλιογραφική επισκόπηση. Η επισκόπηση της βιβλιογραφίας δεν περιορίζεται σε μία συμβατική βιβλιογραφική σύνθεση όπως αυτή που είναι αναμενόμενη κατά την συγκρότηση ενός θεωρητικού πλαισίου αλλά αποσκοπεί στο να λειτουργήσει ως η απαραίτητη γνωσιακή προεργασία για την ανάπτυξη διδακτικής πρότασης.
Effective field theory for hydrodynamics without boosts
Creators: name: Armas, Jay
name: Jain, Akash
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We formulate the Schwinger-Keldysh effective field theory of hydrodynamics without boost symmetry. This includes a spacetime covariant formulation of classical hydrodynamics without boosts with an additional conserved particle/charge current coupled to Aristotelian background sources. We find that, up to first order in derivatives, the theory is characterised by the thermodynamic equation of state and a total of 29 independent transport coefficients, in particular, 3 hydrostatic, 9 non-hydrostatic non-dissipative, and 17 dissipative. Furthermore, we study the spectrum of linearised fluctuations around anisotropic equilibrium states with non-vanishing fluid velocity. This analysis reveals a pair of sound modes that propagate at different speeds along and opposite to the fluid flow, one charge diffusion mode, and two distinct shear modes along and perpendicular to the fluid velocity. We present these results in a new hydrodynamic frame that is linearly stable irrespective of the boost symmetry in place. This provides a unified covariant stable approach for simultaneously treating Lorentzian, Galilean, and Lifshitz fluids within an effective field theory framework and sets the stage for future studies of non-relativistic intertwined patterns of symmetry breaking.
description: 48 pages; v2: added appendix A.3 with comments and comparisons with earlier work; v3: fixed references and typos