cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interpretation of magnetoelectric phase states using the praphase concept and exchange symmetry
Creators: name: Ter-Oganessian, N. V.
name: Sakhnenko, V. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The majority of magnetoelectric crystals show complex temperature-magnetic field or temperature-pressure phase diagrams with alternating antiferromagnetic incommensurate, magnetoelectric, and commensurate phases. Such phase diagrams occur as a result of successive magnetic instabilities with respect to different order parameters, which usually transform according to different irreducible representations (IR) of the space group of the crystal. Therefore, in order to build a phenomenological theory of phase transitions in such magnetoelectrics one has to employ several order parameters and assume the proximity of various instabilities on the thermodynamic path. In this work we analyze the magnetoelectrics MnWO4, CuO, NaFeSi2O6, NaFeGe2O6, Cu3Nb2O8, alpha-CaCr2O4, and FeTe2O5Br using the praphase concept and the symmetry of the exchange Hamiltonian. We find that in all the considered cases the appearing magnetic structures are described by IR's entering into a single exchange multiplet, whereas in the cases of MnWO4 and CuO by a single IR of the space group of the praphase structure. Therefore, one can interpret the complex phase diagrams of magnetoelectrics as induced by a single IR either of the praphase or of the symmetry group of the exchange Hamiltonian. Detailed temperature-magnetic field phase diagrams of MnWO4 and CuO for certain field directions are obtained and the magnetic structures of the field-induced phases are determined.
description: 33 pages, 4 figures, 3 tables
Electron Spin Relaxation in Graphene Nanoribbon Quantum Dots
Creators: name: Droth, Matthias
name: Burkard, Guido
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene is promising as a host material for electron spin qubits because of its predicted potential for long coherence times. In armchair graphene nanoribbons (aGNRs) a small bandgap is opened, allowing for electrically gated quantum dots, and furthermore the valley degeneracy is lifted. The spin lifetime T_1 is limited by spin relaxation, where the Zeeman energy is absorbed by lattice vibrations, mediated by spin-orbit and electron-phonon coupling. We have calculated T_1 by treating all couplings analytically and find that T_1 can be in the range of seconds for several reasons: (i) low phonon density of states away from Van Hove singularities; (ii) destructive interference between two relaxation mechanisms; (iii) Van Vleck cancellation at low magnetic fields; (iv) vanishing coupling to out-of-plane modes in lowest order due to the electronic structure of aGNRs. Owing to the vanishing nuclear spin of 12C, T_1 may be a good measure for overall coherence. These results and recent advances in the controlled production of graphene nanoribbons make this system interesting for spintronics applications.
description: 11 pages, 9 figures, v2: published version
Do children think liking the same foods or sharing saliva is more predictive of social closeness?
Creators: name: Thomas, Ashley J.
name: Hung, Michelle S
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Social and Behavioral Sciences
subject: Developmental Psychology
subject: Psychology
subject: FOS: Psychology

description: Description In this study, we're interested in whether children think that people who share saliva, by using the same spoon, are closer than those who don’t. We also contrast this with whether children think that people who like the same foods, but don’t want to share saliva, are closer. Hypotheses We hypothesize that children will use both cues to make inferences about social affiliation, but will use saliva sharing more strongly.
Outage Probability in Arbitrarily-Shaped Finite Wireless Networks
Creators: name: Guo, Jing
name: Durrani, Salman
name: Zhou, Xiangyun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper analyzes the outage performance in finite wireless networks. Unlike most prior works, which either assumed a specific network shape or considered a special location of the reference receiver, we propose two general frameworks for analytically computing the outage probability at any arbitrary location of an arbitrarily-shaped finite wireless network: (i) a moment generating function-based framework which is based on the numerical inversion of the Laplace transform of a cumulative distribution and (ii) a reference link power gain-based framework which exploits the distribution of the fading power gain between the reference transmitter and receiver. The outage probability is spatially averaged over both the fading distribution and the possible locations of the interferers. The boundary effects are accurately accounted for using the probability distribution function of the distance of a random node from the reference receiver. For the case of the node locations modeled by a Binomial point process and Nakagami-$m$ fading channel, we demonstrate the use of the proposed frameworks to evaluate the outage probability at any location inside either a disk or polygon region. The analysis illustrates the location dependent performance in finite wireless networks and highlights the importance of accurately modeling the boundary effects.
description: accepted to appear in IEEE Transactions on Communications
Mapping Image Potential States on Graphene Quantum Dots
Creators: name: Craes, Fabian
name: Runte, Sven
name: Klinkhammer, Jürgen
name: Kralj, Marko
name: Michely, Thomas
name: Busse, Carsten
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Free electron like image potential states are observed in scanning tunneling spectroscopy on graphene quantum dots on Ir(111) acting as potential wells. The spectrum strongly depends on the size of the nanostructure as well as on the spatial position on top, indicating lateral confinement. Analysis of the substructure of the first state by spatial mapping of constant energy local density of states reveals characteristic patterns of confined states. The most pronounced state is not the ground state, but an excited state with a favorable combination of local density of states and parallel momentum transfer in the tunneling process. Chemical gating tunes the confining potential by changing the local workfunction. Our experimental determination of this workfunction allows to deduce the associated shift of the Dirac point.
description: 4 figures
Helical glasses near ferromagnetic quantum criticality
Creators: name: Thomson, S. J.
name: Krüger, F.
name: Green, A. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the effects of quenched charge disorder on the phase reconstruction near itinerant ferromagnetic quantum critical points in three spatial dimensions. Combining a replica disorder average with a fermionic version of the quantum order-by-disorder mechanism, we show that weak disorder destabilizes the ferromagnetic state and enhances the susceptibility towards incommensurate, spiral magnetic ordering. The Goldstone modes of the spiral phase are governed by a 3d-XY model. The induced disorder in the pitch of the spiral generates a random anisotropy for the Goldstone modes, inducing vortex lines in the phase of the helical order and rendering the magnetic correlations short ranged with a strongly anisotropic correlation length.
description: 7 pages, 4 figures
Doping Mechanisms in Graphene-MoS2 Hybrids
Creators: name: Sachs, B.
name: Britnell, L.
name: Wehling, T. O.
name: Eckmann, A.
name: Jalil, R.
name: Belle, B. D.
name: Lichtenstein, A. I.
name: Katsnelson, M. I.
name: Novoselov, K. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a joint theoretical and experimental investigation of charge doping and electronic potential landscapes in hybrid structures composed of graphene and semiconducting single layer MoS2. From first-principles simulations we find electron doping of graphene due to the presence of rhenium impurities in MoS2. Furthermore, we show that MoS2 edges give rise to charge reordering and a potential shift in graphene, which can be controlled through external gate voltages. The interplay of edge and impurity effects allows the use of the graphene-MoS2 hybrid as a photodetector. Spatially resolved photocurrent signals can be used to resolve potential gradients and local doping levels in the sample.
description: 11 pages, 7 figures
Leppin, Hartmut: Die Kirchenväter und ihre Zeit
Creators: name: Wölke, Hansjörg
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Leppin, Hartmut: Die Kirchenväter und ihre Zeit. München: Beck 2000. 126 S. (Beck Wissen in der Beck‘schen Reihe. 2141; ISBN 3-404-44741-1).
description: Forum Classicum, Nr. 1 (2001): Forum Classicum
A note on tamed Euler approximations
Creators: name: Sabanis, Sotirios
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H99

description: Strong convergence results on tamed Euler schemes, which approximate stochastic differential equations with superlinearly growing drift coefficients that are locally one-sided Lipschitz continuous, are presented in this article. The diffusion coefficients are assumed to be locally Lipschitz continuous and have at most linear growth. Furthermore, the classical rate of convergence, i.e. one--half, for such schemes is recovered when the local Lipschitz continuity assumptions are replaced by global and, in addition, it is assumed that the drift coefficients satisfy polynomial Lipschitz continuity.
description: 10 pages
Infinitesimal rigidity for non-Euclidean bar-joint frameworks
Creators: name: Kitson, Derek
name: Power, Stephen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C25 (primary), 05C10 (secondary)

description: The minimal infinitesimal rigidity of bar-joint frameworks in the non-Euclidean spaces (R^2, ||.||_q) are characterised in terms of (2,2)-tight graphs. Specifically, a generically placed bar-joint framework (G,p) in the plane is minimally infinitesimally rigid with respect to a non-Euclidean l^q norm if and only if the underlying graph G = (V,E) contains 2|V|-2 edges and every subgraph H=(V(H),E(H)) contains at most 2|V(H)|-2 edges.
description: This preprint version differs from the final version which is to appear in the Bulletin of the London Mathematical Society
title: Αυτόματη απομαγνητοφώνηση ακουστικών σημάτων ηχογραφημένα από τηλεοπτικές εκπομπές
Creators: name: Τσέργουλας Ορφέας
Publisher: name: Technical University of Crete
Year: 2007

description: Μη διαθέσιμο
Table S1. from Pollen nutrition fosters honeybee tolerance to pesticides
Creators: name: Barascou, Lena
name: Sene, Deborah
name: Barraud, Alexandre
name: Michez, Denis
name: Lefebvre, Victor
name: Medrzycki, Piotr
name: Di Prisco, Gennaro
name: Strobl, Verena
name: Yañez, Orlando
name: Neumann, Peter
name: Le Conte, Yves
name: Alaux, Cedric
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology

description: Pollen species composition of S pollen and BQ pollen blends.
Hellmut Flashar: Sophokles. Dichter im demokratischen Athen
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Hellmut Flashar: Sophokles. Dichter im demokratischen Athen. München (C. H. Beck) 2000. 220 S. (ISBN 3 406 46639 7).
description: Forum Classicum, Nr. 1 (2001): Forum Classicum
Methods for the quantification of p-coumaric acid and quercetin in pollen mixes from Pollen nutrition fosters honeybee tolerance to pesticides
Creators: name: Barascou, Lena
name: Sene, Deborah
name: Barraud, Alexandre
name: Michez, Denis
name: Lefebvre, Victor
name: Medrzycki, Piotr
name: Di Prisco, Gennaro
name: Strobl, Verena
name: Yañez, Orlando
name: Neumann, Peter
name: Le Conte, Yves
name: Alaux, Cedric
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology

description: A reduction in floral resource abundance and diversity is generally observed in agro-ecosystems, along with widespread exposure to pesticides. Therefore, a better understanding on how the availability and quality of pollen diets can modulate honeybee sensitivity to pesticides is required. For that purpose, we evaluated the toxicity of acute exposure and chronic exposures to field realistic and higher concentrations of azoxystrobin (fungicide) and sulfoxaflor (insecticide) in honeybees provided with pollen diets of differing qualities (named S and BQ pollens). We found that pollen intake reduced the toxicity of the acute doses of pesticides. Contrary to azoxystrobin, chronic exposures to sulfoxaflor increased by 1.5- to 12-fold bee mortality, which was reduced by pollen intake. Most importantly, the risk of death upon exposure to a high concentration of sulfoxaflor was significantly lower for the S pollen diet when compared with the BQ pollen diet. This reduced pesticide toxicity was associated with a higher gene expression of vitellogenin, a faster sulfoxaflor metabolization and a lower concentration of the phytochemical p-coumaric acid, known to upregulate detoxification enzymes. Thus, our study revealed that pollen quality can influence the ability of bees to metabolize pesticides and withstand their detrimental effects, providing another strong argument for the restoration of suitable foraging habitat.
Geometric quantum discord with Bures distance
Creators: name: Spehner, Dominique
name: Orszag, Miguel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We define a new measure of quantum correlations in bipartite quantum systems given by the Bures distance of the system state to the set of classical states with respect to one subsystem, that is, to the states with zero quantum discord. Our measure is a geometrical version of the quantum discord. As the latter it quantifies the degree of non-classicality in the system. For pure states it is identical to the geometric measure of entanglement. We show that for mixed states it coincides with the optimal success probability of an ambiguous quantum state discrimination task. Moreover, the closest zero-discord states to a given state are obtained in terms of the corresponding optimal measurements.
description: The first version has been split into two papers. Sec. V have been removed. The results of this section are published separately in a new preprint arXiv:1308.5005. Minor changes with respect to the second version. 24 pages, no figure
n-digit Benford distributed random variables
Creators: name: Khosravani, Azar
name: Rasinariu, Constantin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 11Kxx (primary), 60Exx (secondary)

description: The scope of this paper is twofold. First, to emphasize the use of the mod 1 map in exploring the digit distribution of random variables. We show that the well-known base- and scale-invariance of Benford variables are consequences of their associated mod 1 density functions being uniformly distributed. Second, to introduce a new concept of the $n$-digit Benford variable. Such a variable is Benford in the first $n$ digits, but it is not guaranteed to have a logarithmic distribution beyond the $n$-th digit. We conclude the paper by giving a general construction method for $n$-digit Benford variables, and provide a concrete example.
description: 9 pages, 5 figures
title: Αποτυπώματα θερινής κατοίκησης: αναγνώσεις στο τοπίο της Αντιπάρου
Creators: name: Παπασηφακη Αικατερινη
name: Μπαρμπαγαδακη Ρωξανη
Publisher: name: Technical University of Crete
Year: 2017

description: Σκοπός της εργασίας είναι η διερεύνηση της επιρροής της παραθεριστικής κατοικίας στην εξέλιξη του τοπίου των Κυκλάδων μέσα από τη μελέτη της περιπτώσεως της Αντιπάρου. Αντικείμενο της έρευνας αποτελούν οι τοπιακές μεταβολές που δημιουργούνται στα νησιά των Κυκλάδων και ειδικά στο νησί της Αντιπάρου, από την εξάπλωση των τουριστικών εγκαταστάσεων, καθώς και περιπτώσεις παραθεριστικών κατοικιών των τελευταίων δεκαετιών στην Αντίπαρο.
title: Φάμπρικα Υφανέτ : Eπανάχρηση της πρώην βιομηχανίας,  ανάπλαση και διαμόρφωση αστικού πρασίνου σε τμήμα του ρέματος Κωνσταντινίδη στη Θεσσαλονίκη
Creators: name: Τομαρα Αγαθη-Σταυρουλα
name: Μπολου Ευαγγελια
name: Παναγιωταρου Σταυρουλα
Publisher: name: Technical University of Crete
Year: 2017

description: Στην παρούσα εργασία μελετάται η παλιά βιομηχανία
κλωστοϋφαντουργίας ΥΦΑΝΕΤ, ο υπολειμματικός χώρος
πρασίνου του ρέματος Κωνσταντινίδη που γειτνιάζει με
αυτήν και ο περιβάλλον αστικός ιστός στην περιοχή της
Κάτω Τούμπας στη Θεσσαλονίκη. Η εγκατάλειψη που
χαρακτηρίζει την περιοχή μελέτης καθιστά τους παραπάνω
χώρους αστικά κενά που επιφέρουν ασυνέχειες, δυσκολία
προσβασιμότητας, αυθαίρετη δόμηση και μη ελεγχόμενη
στάθμευση.
Η αξιοποίηση του κτιριακού αποθέματος , η επανάχρησή
του και η συνύπαρξή του με νέα στοιχεία , η αναδιάρθρωση
του αστικού χώρου καθώς και η εξυγίανση του χώρου
πρασίνου γύρω απ' το ρέμα αποτελούν το αντικείμενο
μελέτης μας.
Προτείνεται λοιπόν ένα δίκτυο κινήσεων και ανοιχτών
χώρων για την ένωση με τους υπόλοιπους ελκυστήρες της
πόλης, αλλά και την επανένταξη του κελύφους στον αστικό
ιστό, καθιστώντας το έτσι νέο πόλο έλξης. Συμπληρωματικά,
η αξιοποίηση του φυσικού τοπίου και η δημιουργία χώρων
για περίπατο, περισυλλογή, παιχνίδι στόχο έχουν την
γενικότερη αναβάθμιση της περιοχής.
Στην παλιά βιομηχανία προτείνεται η διατήρηση και
επανάχρηση του βασικού κτιριακού όγκου, ενώ παράλληλα
αποκαλύπτονται οι όψεις του από τις περιμετρικές μονάδες
για τη δημιουργία ικανού ανοιχτού δημόσιου χώρου. Με τις
νέες χρήσεις που οργανώνουν πλέον το πρόγραμμα του
κτιρίου μελετώνται συλλογικές δομές εργασίας και
κατοίκησης που στοχεύουν στην ενίσχυση κοινωνικών και
οικονομικών δραστηριοτήτων. Πιο συγκεκριμένα πρόκειται
για ένα χώρο πολιτισμού πολλαπλών χρήσεων, μονάδες
βιοτεχνιών , συνεργατικούς χώρους (co working), χώρους
προς ενοικίαση για εμπόριο, χώρους εστίασης. Επιπλέον
προστίθενται δύο νέοι όγκοι, ένα κτίριο hostel και μια
μεταλλική κατασκευή - τοπόσημο, που λειτουργεί ως
ημιυπαίθριος κήπος και παρατηρητήριο.
title: ''Robotics in Architecture_μια νέα σχέση πραγματικού – ψηφιακού''. Ρομποτικές εφαρμογές στην αρχιτεκτονική κατασκευή και σχεδιασμό. Η εφαρμογή WorldCraft (Swarm Fabrication app.) στη νήσο ήμερη Γραμβούσα

Creators: name: Ντζουφρας Σωτηριος
Publisher: name: Technical University of Crete
Year: 2017

description: Στα πλαίσια της ερευνητικής εργασίας: ''Robotics in Architecture_Μια νέα σχέση πραγματικού – ψηφιακού'', η παρούσα διπλωματική εργασία εστιάζει στην επικοινωνία μεταξύ σχεδιαστή και ρομποτικού σμήνους στην διαδικασία της κατασκευής. Λαμβάνοντας υπόψη τα συμπεράσματα της έρευνας ‘Extra-terrestrial habitats’ (σχεδιασμός αποικίας στον Άρη, Ερευνητική: κεφάλαιο 4/4.3.1) και εστιάζοντας στις δυσκολίες επικοινωνίας και διαχείρισης του σμήνους από τον χρήστη, γίνεται μια προσπάθεια διερεύνησης ενός νέου εργαλείου επικοινωνίας και ανάλυσης ενός συνολικότερου συστήματος στο οποίο λαμβάνει χώρα (η εφαρμογή παρουσιάζεται στην ερευνητική εργασία στο κεφάλαιο 4/4.3.2).
Στόχος
   Η συγκεκριμένη έρευνα προσπαθεί να εξερευνήσει ένα νέο σχεδιαστικό εργαλείο μέσα από το οποίο ο σχεδιαστής θα έχει την δυνατότητα να επικοινωνήσει με ένα σμήνος αυτόνομων ρομποτικών πρακτόρων, με σκοπό τον σχεδιασμό και την κατασκευή ενός πολύπλοκου κτιριακού όγκου, χρησιμοποιώντας γεωμορφολογικά δεδομένα. Με λίγα λόγια, στόχος είναι να δημιουργηθεί μια αποτελεσματική πλατφόρμα επικοινωνίας μεταξύ πραγματικού – εικονικού.
Βασισμένο σε μια υπάρχουσα πλατφόρμα το Minecraft, το νέο αυτό εργαλείο προσπαθεί να μεταφέρει την εμπειρία του χώρου μεταξύ πραγματικού και ανάλυσης δομής, να διαχειριστεί την πολυπλοκότητα του σχεδιασμού, το δομημένο περιβάλλον αλλά και τον προγραμματισμό των ρομπότ, προκειμένου να προσφέρει πληροφορίες για το περιβάλλον εφαρμογής, καθώς και νέες δυνατότητες κυρίως ως προς την πραγματοποίηση  απαιτητικών αρχιτεκτονικών έργων.
   Το εργαλείο ονομάζεται Worldcraft και η λειτουργία του βασίζεται στις σχέσεις ενός ευρύτερου συστήματος. Για την κατανόηση του εργαλείου είναι σημαντική η διερεύνηση της λειτουργίας του.
   Το σύστημα αποτελείται από τέσσερα στάδια, την αποτύπωση και δημιουργία βάσης δεδομένων, την διαδικασία κυβοποίησης, την κωδικοποίηση του σχεδιασμού  για τη διαδικασία της κατασκευής και τέλος τη μεθοδολογία του σχεδιασμού, ο οποίος διεξάγεται από την αρχή του συστήματος παράλληλα με τα ενδιάμεσα στάδια.
   Επομένως, η έρευνα εστιάζει στα διαφορετικά στάδια του συστήματος και στις σχέσεις μεταξύ αυτών, καθώς, όπως αναφέρθηκε και στο πρώτο κεφάλαιο της ερευνητικής εργασίας, η ρομποτική και συγκεκριμένα το ρομποτικό σμήνος στην διαδικασία του σχεδιασμού και κατασκευής, απαιτεί μια ολιστική προσέγγιση των διαδικασιών με έμφαση στις σχέσεις ενός συστήματος.
title: Έξυπνες Πόλεις (Smart Cities): οι νέες τεχνολογίες και η επίδρασή τους στο σύγχρονο αστικό περιβάλλον μέσα από μελέτες περίπτωσης
Creators: name: Χαριτωνιδης Χαριτων
Publisher: name: Technical University of Crete
Year: 2017

description: Στην παρούσα ερευνητική εργασία, θα πραγματοποιηθεί μελέτη σχετικά με το
μοντέλο των ‘’Έξυπνων Πόλεων’’ ή ‘’Ευφυών πόλεων’’ (Intelligent or Smart City,) και την συμβολή του στην αντιμετώπιση των σύγχρονων αστικών προβλημάτων μέσα από την ανάλυση παραδειγμάτων. Ο όρος Ευφυής Πόλη στην εργασία αυτή,
αντιπροσωπεύει του όρους Intelligent City και Smart City που εμφανίστηκαν τον 21ο αιώνα. Θα διερευνηθούν οι έννοιες, οι ορισμοί, τα επίπεδα και τα χαρακτηριστικά που διαμορφώνουν το μοντέλο αυτό, και θα αναζητηθεί η προέλευση των όρων ψηφιακή πόλη, έξυπνη πόλη, ευφυής πόλη, μέσα από μια αναδρομή στην εξέλιξη των τεχνολογιών της πληροφορικής και των επικοινωνιών σε παγκόσμια κλίμακα.
Στη συνέχεια θα πραγματοποιηθεί ανάλυση πρακτικών εφαρμογών του, σε πόλεις
οι οποίες υιοθέτησαν και ανέπτυξαν επιτυχημένα στρατηγικές έξυπνων πόλεων
στον Ευρωπαικό χώρο (Βαρκελώνη, Άμστερνταμ) και στην Ελλάδα (Ηράκλειο). Στο τέλος θα παρουσιαστούν γενικά συμπεράσματα που προέκυψαν από την ανάλυση των πρακτικών εφαρμογών του, και θα τεθούν προβληματισμοί για το μέλλον των ‘’Έξυπνων Πόλεων’’.
Η ανάπτυξη των τεχνολογιών πληροφορικής και επικοινωνιών, σε συνδυασμό με τις συμπράξεις μεταξύ επιχειρήσεων, βιομηχανίας, τοπικών αρχών και κοινωνίας
αποτέλεσαν τη βασική συνιστώσα για την σκιαγράφηση αυτής της νέας ψηφιακής
εποχής. Στόχος είναι η διερεύνηση της ιδέας της ‘’έξυπνης πόλης’’ ως ένα νέο
μοντέλο σχεδιασμού στις σύγχρονες κοινωνίες, το οποίο διαμέσου τις τεχνολογίας
και της καινοτομίας καθιστά τις πόλεις πιο βιώσιμες και λειτουργικές,
συμβάλλοντας στην αειφόρο ανάπτυξή τους και βελτιώνοντας παράλληλα την
ποιότητα ζωής των κατοίκων τους. Η προσέγγιση του θέματος, πραγματοποιείται
μέσω βιβλιογραφικής έρευνας, κυρίως αγγλικής, που περιλαμβάνει κείμενα, άρθρα,
δημοσιεύσεις σε βιβλία, επιστημονικά περιοδικά και πηγές από το διαδίκτυο.
Direct versus indirect methods for growth measurements in batch cultures of Nitzschia palea
Creators: name: Merse, Ana
name: Sánchez Humayor, Mireia
name: Medina Alcaraz, Carolina
name: Martel Quintana, Antera
name: Gómez Pinchetti, Juan Luis
name: Pisapia, Francesco
Publisher: name: Zenodo
Year: 2021
Subjects: Nitzschia palea
diatoms
Optical density
basal fluorescence
growth
microalgae
aquaculture
batch
cell counting
biomass

description: Direct measurements such as cell density, are considered the most reliable methods for growth monitoring of microalgae. In comparison, indirect methods are undoubtedly less time-consuming, but their relevance needs to be evaluated case by case for the species and the experimental conditions used. Our study focused on the relevance of optical density (OD) and basal fluorescence (FO) measurements for batch cultures of the benthic diatom Nitzschia palea. Three Canarian strains of N. palea were cultured in triplicate 1 L Erlenmeyer flasks with 270 mL FDMed medium for 26 days with 1.3 x 105 cells mL-1 ± 27% (RSD). The three strains showed their maximum growth rate between days 4 and 7 (BEA0255B: 0.21 day-1 ± 0.023 (SD), BEA0256B: 0.23 day-1 ± 0.058 (SD), BEA0392B: 0.42 day-1 ± 0.065 (SD)), and entered the stationary phase at day 17, maintaining an average concentration of 1.5 x 106 cells mL-1± 11% (RSD). Comparison between cell density, OD and FO was performed using the data of each replicate of the three strains in the same analysis. The relevance of OD and FO measurements was demonstrated during the exponential phase, as they both positively correlated with cell density in a linear regression model (R2 > 0.89, n = 45). No linear correlation was found during the stationary phase (R2 < 0.46, n = 45). Further studies will address the study of photosynthetic efficiency, biomass weight and composition throughout the growth phases of N. palea, with the aim of determining the optimal harvesting time for biotechnology.
description: YAS2021 organized by EABA
Q&A: How do plants respond to ethylene and what is its importance?
Creators: name: Chang, Caren
Publisher: name: Springer Nature
Year: 2016
Subjects: Ethephon
Ethylene Response
Ethylene Biosynthesis
Endoplasmic Reticulum Membrane
Ethylene Signaling

description: Ethylene gas is a major plant hormone that influences diverse processes in plant growth, development and stress responses throughout the plant life cycle. Responses to ethylene, such as fruit ripening, are significant to agriculture. The core molecular elements of the ethylene-signaling pathway have been uncovered, revealing a unique pathway that is negatively regulated. Practical applications of this knowledge can lead to substantial improvements in agriculture.
title: КОРРЕЛЯЦИЯ МЕЖДУ УБОЙНЫМИ И МИКРОСТРУКТУРНЫМИ ПОКАЗАТЕЛЯМИ МЯСНОЙ ПРОДУКТИВНОСТИ ОВЕЦ
Creators: name: ДМИТРИК,  ИРИНА ИВАНОВНА
name: СЕЛИОНОВА , МАРИНА ИВАНОВНА
name: ЗАВГОРОДНЯЯ,  ГАЛИНА ВИКТОРОВНА
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: Сравнительная гистологическая оценка мясных качеств овец разных классов продуктивности показала, что мясо овец, полученное от животных класса экстра в среднем по тонкорунным породам (ставропольская и манычский меринос) характеризовалось большим числом мышечных волокон на единицу площади на 9,6 %, меньшим их диаметром на 14,8 %, более высокой оценкой «мраморности» на 8,3 балла, меньшим содержанием соединительной тканина 1,72 абс.% по сравнению с 3-м классом при Р < 0,05-0,01. В среднем по обеим тонкорунным породам по живой массе класс «экстра» имел преимущество над 1-м и 2-м классами на 17,3и 41,4 % соответственно, 3-й класс уступал животным класса «экстра» на 40,7 %. Убойный выход у животных класса «экстра» на 0,97; 2,1 и 6,2 абс.% превосходил 1-й, 2-й и 3-й классы соответственно. Положительная корреляция установлена между диаметром мышечных волокон и всеми убойными показателями у животных классов «экстра», 1-й и 2-й, а в 3-м классе эти зависимости были отрицательные (r = -0,273 и -0,360), кроме убойного выхода ( r= 0,381), причем убойный выход у животных всех изученных классов высоко положительно коррелировал со всеми показателями микроструктурного анализа мяса и только содержание соединительной ткани имело отрицательные корреляции, кроме животных 3-го класса. Со снижением класса уменьшается уровень корреляции убойных показателей с микроструктурными показателями качества мяса.У животных 3-го класса корреляция убойных показателей с гистологией мышечной ткани была в основном отрицательная. Следовательно, с увеличением продуктивности овец увеличиваются коэффициенты корреляции с показателями микроструктурного анализа мяса. Таким образом,большее число мышечных волокон умеренного размера с меньшим содержанием соединительной ткани дает больше мяса хорошего качества. Полученные результаты указывают на целесообразность использования морфометрических показателей мышечной ткани при оценке мясной продуктивности овец.
title: К ВОПРОСУ СОВЕРШЕНСТВОВАНИЯ СЕРТИФИКАЦИИ ШЕРСТИ
Creators: name: ТИМОШЕНКО,  НИКОЛАЙ КОНСТАНТИНОВИЧ
name: СЕЛИОНОВА,  МАРИНА ИВАНОВНА
name: ЕЛИЗАРОВА,  ИРАИДА ГРИГОРЬЕВНА
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: В статье рассмотрены состояние добровольной сертификации шерсти и возможные направления ее совершенствования: целесообразность аккредитации органов по сертификации и испытательных лабораторий шерсти в единых хозяйствующих структурах; необходимость изменения терминологии шерсти Общероссийского классификатора продукции и области аккредитации юридических лиц в соответствии с ее терминологией в ГОСТах; возможность аккредитации национальных лабораторий шерсти в международных системах; методология отбора образцов шерсти, их испытаний и схемы сертификации; необходимость участия органов по сертификации и испытательных лабораторий шерсти в созданной Росстандартом Национальной системе сертификации.
NFDI4Culture - Konsortium für Forschungsdaten zu materiellen und immateriellen Kulturgütern
Creators: name: Schrade, Torsten
Publisher: name: Zenodo
Year: 2022
Subjects: NFDI
Text+
Textplus
Text+ Plenary 22
Research Data Management
nfdi4culture

description: Presentation at the plenary meeting of the NFDI consortium Text+ on September 12, 2022 in Mannheim, Germany.
description: Text+ receives a funding grant from the DFG under the grant agreement number 460033370. Text+ is contributing to the NFDI, the National Research Data Infrastructure (NFDI).
title: УБОЙНЫЕ ПОКАЗАТЕЛИ И ГИСТОЛОГИЧЕСКИЙ АНАЛИЗ МЯСА БАРАНЧИКОВ ПОРОДЫ ДЖАЛГИНСКИЙ МЕРИНОС ПРИ ВЫРАЩИВАНИИ НА ЗАМЕНИТЕЛЕ ОВЕЧЬЕГО МОЛОКА СЕРВАКИД ПРО
Creators: name: АНДРУШКО , АЛЕКСАНДР МЕЧИСЛАВОВИЧ
name: ЗАВГОРОДНЯЯ,  ГАЛИНА ВИКТОРОВНА
name: ДМИТРИК,  ИРИНА ИВАНОВНА
name: ПАВЛОВА,  МАРИЯ ИВАНОВНА
name: СЕРДЮКОВ,  ИГОРЬ ГЕННАДЬЕВИЧ
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: Во все времена ведения овцеводства особой проблемой была и остается сохранность полученного молодняка. Учитывая, что основной отход молодняка в первые сутки жизни происходит из числа двойневых ягнят, ягнят-сирот или полученных от маломолочных маток, разработан метод их выращивания без маток с использованием заменителей овечьего молока. Для искусственного выращивания из двойневых, тройневых ягнений берут, как правило, одного или двух ягнят в 2-3-суточном возрасте. При этом необходимо, чтобы ягненок в течение первых 1-2 сут получил молозиво своей или чужой матери. При выращивании ягнят с использованием заменителей овечьего молока, комбикормов и сена обеспечивается максимальная сохранность народившихся ягнят, а при дальнейшем их откорме - увеличение производства молодой баранины. Одним из таких заменителей овечьего молока является Сервакид Про, произведенный французской фирмой «Сервал». Эксперимент по использованию этого препарата показал, что мясная продукция молодняка во всех сравниваемых группах по предубойной массе и убойному выходу была фактически одинаковой. Однако выявлено, что 3-я опытная группа молодняка отличалась большим коэффициентом мясности в среднем на 5,6 %, большим числом мышечных волокон на единицу площади - в среднем на 14,0 %, меньшим диаметром мышечного волокна и количеством соединительной ткани - на 11,6 и 6,2 %, при этом отмечалось большое число межволоконных и межпучковых включений, что обусловило более высокую оценку «мраморности» мяса в среднем на 3,1 балла, т. е. мясо баранчиков 3-й опытной группы, получавшей заменитель овечьего молока, было нежнее и сочнее по сравнению со сверстниками 1-й контрольной и 2-й опытной групп.
The Group of Units on an Affine Variety
Creators: name: Ford, Timothy J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13A05 (Primary), 14C20, 14R99 (Secondary)

description: The object of study is the group of units O^\ast(X) in the coordinate ring of a normal affine variety X over an algebraically closed field k. Methods of Galois cohomology are applied to those varieties that can be presented as a finite cyclic cover of a rational variety. On a cyclic cover X \rightarrow A^m of affine m-space over k such that the ramification divisor is irreducible and the degree is prime, it is shown that O^\ast(X) is equal to k^\ast, the nonzero scalars. The same conclusion holds, if X is a sufficiently general affine hyperelliptic curve. If X has a projective completion such that the divisor at infinity has r components, then sufficient conditions are given for O^\ast(X)/k^\ast to be isomorphic to Z^(r-1).
title: ФИЗИКО-МЕХАНИЧЕСКИЕ СВОЙСТВА ОВЧИН ОВЕЦ РАЗНЫХ ГЕНОТИПОВ
Creators: name: ДМИТРИК,  ИРИНА ИВАНОВНА
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: В настоящее время потребность в овчинно-меховом сырье для меховой промышленности определяет необходимость детального изучения особенностей овчин разных пород овец, без чего невозможны разработка и реализация мер по повышению качества сырья, рациональному построению и совершенствованию технологических процессов его переработки. Основные товарные и технологические свойства овчин формируются на животных в прижизненный период, поэтому сохранение их качества необходимо начинать с выращивания и содержания овец с учетом биологических особенностей и условий разведения, а также влияние разных вариантов скрещивания на гистологическую структуру кожи и физико-механические свойства овчин. В ОАО ПЗ «Улан-Хееч» Яшкульского района Республики Калмыкия проведена работа по изучению особенностей формирования овчинно-меховой продукции овец грозненской породы (ГТ) с разной долей кровности баранов австралийский мясной меринос (АММ) и ставропольской породы (СТ). Установлено, что наибольшей живой массой обладали ярочки 1-й группы (АММ×ГТ) - 35,0 кг, что на 2,04; 0,3; 5,1 и 6,7 % выше, чем у ярочек 2-й (½(АММ×ГТ)×ГТ),3-й (½(АММ×СТ) ×ГТ), 4-й (СТ×ГТ) и 5-й (ГТ×ГТ) групп соответственно. По площади парной овчины и толщине кожевой ткани невыделанные овчины от ярочек 1-й группы превосходили сверстниц 2-й, 3-й, 4-й и 5-й групп на 9,3; 1,3; 12,0; 14,2 % и 18,8; 5,6; 26,7; 35,7 % соответственно. Количество волокон на 1 мм2 площади кожи невыделанных овчин в 1-й группе имело превосходство на 10,8; 4,0; 17,8 и 32,1 %, соответственно, над другими группами, с достаточно высокими показателями соотношения ВФ/ПФ во всех группах. Толщина кожи ярочек 1-й группы была выше на 24,9; 14,3; 38,5 и 40,2 %, соответственно, чем у сверстниц 2-й, 3-й, 4-й и 5-й групп. Это указывает на то, что овчины молодняка 1-й группы (АММ×ГТ) характеризуются более густой однородной тонкой шерстью, более легкие, которые лучше использовать для изготовления зимней женскойи детской одежды.
title: ПРОДУКТИВНОСТЬ БАРАНОВ-ПРОИЗВОДИТЕЛЕЙ ПРИ ИСПОЛЬЗОВАНИИ В РАЦИОНЕ КОРМОВОЙ ДОБАВКИ «ГЛЮТЕН КУКУРУЗНЫЙ»
Creators: name: АБИЛОВ,  БАТЫРХАН ТЮЛИМБАЕВИЧ
name: МАРЫНИЧ,  АЛЕКСАНДР ПАВЛОВИЧ
name: СЕРДЮКОВ,  ИГОРЬ ГЕННАДЬЕВИЧ
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: При обогащении рационов баранов-производителей шерстного и мясо-шерстного направлений продуктивности в случной период кормовой добавкой «Глютен кукурузный» в количестве 56 и 66 г на голову в сутки увеличивается содержание сырого протеина, лизина, метионина и цистина; повышаются: переваримость основных питательных веществ рационов, объем эякулята, активность спермиев и показатель резистентности, концентрация спермиев, оплодотворяемость овцематок.
Sinc-based method for an efficient solution in the direct space of quantum wave equations with periodic boundary conditions
Creators: name: Marconcini, Paolo
name: Logoteta, Demetrio
name: Macucci, Massimo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The solution of differential problems, and in particular of quantum wave equations, can in general be performed both in the direct and in the reciprocal space. However, to achieve the same accuracy, direct-space finite-difference approaches usually involve handling larger algebraic problems with respect to the approaches based on the Fourier transform in reciprocal space. This is the result of the errors that direct-space discretization formulas introduce into the treatment of derivatives. Here, we propose an approach, relying on a set of sinc-based functions, that allows us to achieve an exact representation of the derivatives in the direct space and that is equivalent to the solution in the reciprocal space. We apply this method to the numerical solution of the Dirac equation in an armchair graphene nanoribbon with a potential varying only in the transverse direction.
description: 24 pages, 5 figures. This is the final version published in JAP, and has several changes and additions with respect to the previous arXiv version
title: О СЕРТИФИКАЦИИ И КАЧЕСТВЕ ШЕРСТИ
Creators: name: ТИМОШЕНКО,  НИКОЛАЙ КОНСТАНТИНОВИЧ
name: РАЗГОНОВ,  НИКОЛАЙ ТИМОФЕЕВИЧ
name: БАЖЕНОВА,  ИРИНА АЛЕКСАНДРОВНА
name: ЕЛИЗАРОВА,  ИРАИДА ГРИГОРЬЕВНА
name: ТРЕТЬЯКОВА,  ЛЮДМИЛА ИВАНОВНА
Publisher: name: ФГБНУ "Северо-Кавказский федеральный научный аграрный центр"
Year: 2019

description: Сертификация продукции, как известно, в рыночной экономике является одним из основных общепринятых механизмов управления ее качеством. В статье обозначены основные показатели сертифицированной шерсти за 2018 г. и 2015-2017 гг. 12 регионов страны (Северного Кавказа, Поволжья, Алтая, Забайкалья): количество шерсти; тонина шерсти - основной показатель, предопределяющий ее прядильную способность; состояние (засоренность) шерсти, от которой зависит выход пряжи. Для улучшения качества шерсти предложены мероприятия: необходимость дополнительного субсидирования производства тонкой и полутонкой шерсти и ориентации овцеводства на производство тонкой шерсти 70 и 64 «качеств» (тониной до 23 мкм), на которую имеется постоянный спрос на рынке.
Use of selective breeding in the diatom species Seminavis robusta for improvement of European aquaculture
Creators: name: Pisapia, Francesco
name: Chaerle, Peter
name: Cucchi, Francesca
name: Chepurnova, Olga
name: Martel Quintana, Antera
name: Vyverman Wim
name: Gómez Pinchetti, Juan Luis
Publisher: name: Zenodo
Year: 2022
Subjects: Seminavis robusta
sexual reproduction
growth
plate reader
CY5 fluorescence
microalgae
aquaculture
diatoms
fatty acids
progeny
wild-type

description: Microalgae are a natural source of high-value fatty acids and could address the reduced availability of fish oil from pelagic fisheries and the increasing needs from the aquaculture sector and the ω-3 market (Chauton et al., 2015). Still, their exploitation on an industrial scale is scarce, mainly due to the lack of highly performant strains.
 Classical breeding constitutes a source of genetic diversification in microalgae, generating progeny strains with unique genetic heritage and bypassing the controversial issue of genetically modified organisms (GMOs). In the framework of the H2020 NewTechAqua project, our goal is to generate improved microalgae strains via classical breeding for application as aquafeed in European aquaculture. The heterothallic diatom species Seminavis robusta is particularly suitable for controlled breeding programs based on pedigree selection (Chepurnov et al., 2012).
 Eight wild-type strains of S. robusta were purchased from the BCCM/DCG collection (PAE laboratory, UGENT, Belgium) and crossbred according to their sexual compatibility (De Decker et al., 2018). Single cells of 66 F1 progeny strains from eleven breeding pairs successfully developed into monoclonal cultures. All the 74 strains were cultured for twelve days under the same growth conditions in 6-well plates. Sixteen bright field and fluorescence CY5 images per well were taken every three days using the Cytation™ 3 plate reader and imager from BioTek, and processed using Gen5 and ImageJ softwares. Cell density over time was estimated using the percentage of surface showing CY5 fluorescence over the total surface.
 Sixteen F1 progeny strains aroused biotechnological interest as they showed faster growth compared to their wild-type parents. Further studies will address fatty acid composition and
 quantification for all the strains. The most performant F1 strains will undergo crossbreeding experiments in an iterative manner, using a pedigree-based approach.
 Our findings will ultimately contribute to achieving a more sustainable, resilient, and cost-effective European aquaculture.
description: ABS2022 organized by ABO
Crossover physics in the non-equilibrium dynamics of quenched quantum impurity systems
Creators: name: Vasseur, Romain
name: Trinh, Kien
name: Haas, Stephan
name: Saleur, Hubert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A general framework is proposed to tackle analytically local quantum quenches in integrable impurity systems, combining a mapping onto a boundary problem with the form factor approach to boundary-condition-changing operators introduced in Phys. Rev. Lett. 80, 4370 (1998). We discuss how to compute exactly two central quantities of interest: the Loschmidt echo and the distribution of the work done during the quantum quench. Our results display an interesting crossover physics characterized by the energy scale T_b of the impurity corresponding to the Kondo temperature. We discuss in detail the non-interacting case as a paradigm and benchmark for more complicated integrable impurity models, and check our results using numerical methods.
description: 4.5 pages + supplementary material. Published version
Completely flat bands and fully localized states on surfaces of anisotropic diamond-lattice models
Creators: name: Takahashi, Ryuji
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We discuss flat-band surface states on the (111) surface in the tight-binding model with nearest-neighbor hopping on the diamond lattice, in analogy to the flat-band edge states in graphene with a zigzag edge. The bulk band is gapless, and the gap closes along a loop in the Brillouin zone. The verge of the flat-band surface states is identical with this gap-closing loop projected onto the surface plane. When anisotropies in the hopping integrals increase, the bulk gap-closing points move and the distribution of the flat-band states expands in the Brillouin zone. Then when the anisotropy is sufficiently large, the surface flat bands cover the whole Brillouin zone. Because of the completely flat bands, we can construct surface-state wavefunctions which are localized in all the three directions.
description: 9 pages, 9 figures
An accurate Newtonian description of particle motion around a Schwarzschild black hole
Creators: name: Tejeda, Emilio
name: Rosswog, Stephan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A generalized Newtonian potential is derived from the geodesic motion of test particles in Schwarzschild spacetime. This potential reproduces several relativistic features with higher accuracy than commonly used pseudo-Newtonian approaches. The new potential reproduces the exact location of the marginally stable, marginally bound, and photon circular orbits, as well as the exact radial dependence of the binding energy and the angular momentum of these orbits. Moreover, it reproduces the orbital and epicyclic angular frequencies to better than 6%. In addition, the spatial projections of general trajectories coincide with their relativistic counterparts, while the time evolution of parabolic-like trajectories and the pericentre advance of elliptical-like trajectories are both reproduced exactly. We apply this approach to a standard thin accretion disc and find that the efficiency of energy extraction agrees to within 3% with the exact relativistic value, while the energy flux per unit area as a function of radius is reproduced everywhere to better than 7%. As a further astrophysical application we implement the new approach within a smoothed particle hydrodynamics code and study the tidal disruption of a main-sequence star by a supermassive black hole. The results obtained are in very good agreement with previous relativistic simulations of tidal disruptions in Schwarzschild spacetime. The equations of motion derived from this potential can be implemented easily within existing Newtonian hydrodynamics codes with hardly any additional computational effort.
description: 11 pages, 8 figures, minor corrections to match version accepted for publication in MNRAS
Batch cultures of three native Canarian strains of Nitzschia palea: growth and fatty acid production
Creators: name: Pisapia, Francesco
name: Merse, Ana-Luisa
name: Quintana Martel, Antera
name: Gómez Pinchetti, Juan Luis
Publisher: name: Zenodo
Year: 2022
Subjects: Nitzschia palea
fatty acids
growth
basal fluorescence
optical density
aquaculture

description: Assessment of growth and production of metabolites of interest from a given microalgae on a laboratory scale is crucial to evaluate its potential applicability on larger scales into the biotechnology sector. Our work within the H2020 NewTechAqua project focuses on fatty acid production for use of microalgae as aquafeed in the aquaculture industry.
 Growth studies of microalgae comprise the estimation of cell density over time, for which several methods have been described in the literature. While indirect methods are undoubtedly less time-consuming, their relevance needs to be evaluated case by case for the species and the experimental conditions used.
 Our study focused on the benthic diatom Nitzschia palea, a species of interest for biotechnology (Abdel-Hamid et al., 2013). Three native strains of N. palea from the Canaries were cultured for 26 days in triplicate flasks under the same culture conditions. Growth was monitored using cell counting as direct method, and optical density (OD) and basal fluorescence (Fo) as indirect methods. The three strains showed their maximum growth rates between days 4 and 7 (0.21 – 0.29 day-1), and entered the stationary phase at day 17. The relevance of OD and Fo was demonstrated during the exponential phase only (days 4 – 17), as they both positively correlated with cell density in a linear regression model (R2 > 0.89, n = 45).
 Preliminary results on the fatty acid (FA) composition indicated that the major FAs produced by N. palea were palmitic acid (18 – 41 %) and palmitoleic acid (12 – 25 %), in accordance with a previous study (Touliabah et al., 2020). As for the ω-3 FAs, DHA was poorly produced (≤ 3%), while EPA constituted a major FA for two of the strains (21% and 13%).
 This study showed that OD and Fo were suitable alternatives to cell counting for cell density estimation, at least during the exponential phase of growth, allowing faster execution of the daily laboratory work.
 More accurate studies on the fatty acid production should be developed in the future to have a more comprehensive view of the biotechnological value of these strains.
description: ABS2022 organized by ABO