cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Έρευνα κοινού σχετικά με το βαθμό ευαισθητοποίησης και τις ενέργειες των νοικοκυριών για την αντιμετώπιση της κλιματικής αλλαγής
title: Public research on the degree of awareness and actions of households in dealing with climate change
titleType: AlternativeTitle
Creators: name: Σκολαρίκης, Ισαάκ
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Κλιματική αλλαγή
Πανδημία
Covid-19
Ελλάδα
Ελληνικά νοικοκυριά
Βαθμός ευαισθητοποίησης
Ενημέρωση
Climate change
Pandemic
Greece
Awareness

description: Η κλιματική αλλαγή είναι ένα θέμα που απασχολεί έντονα τη διεθνή κοινότητα, με τους κινδύνους για τα φυσικά, κοινωνικά και οικονομικά συστήματα να είναι ιδιαίτερα σοβαροί. Για τη βέλτιστη διαχείριση της χρειάζονται σημαντικές μειώσεις στις εκπομπές αερίων θερμοκηπίου τις επόμενες δεκαετίες, κάτι που απαιτεί μετασχηματισμό της καθημερινότητας και ευρεία αποδοχή από τους πολίτες. Τις τελευταίες δεκαετίες συμμετέχουν όλο και περισσότερο οι ενδιαφερόμενοι φορείς σε στρατηγικές δράσεις και ενημέρωσης της κοινής γνώμης για την κλιματική αλλαγή. Δεδομένης της πανδημίας, η καθημερινότητα των πολιτών έχει αλλάξει σημαντικά και οι παγκόσμιες εκπομπές αερίων του θερμοκηπίου το 2020 έχουν μειωθεί, αλλά το ποσοστό αυτό θα ανακάμψει μόλις αρθούν οι περιορισμοί κινητικότητας και μόλις ανακάμψουν οι οικονομίες, εκτός εάν παρέμβουν οι κυβερνήσεις και οι πολίτες ενημερωθούν και ευαισθητοποιηθούν περισσότερο. Σκοπός της παρούσας ερευνητικής εργασίας αποτελεί η διατύπωση των απόψεων των ελληνικών νοικοκυριών σχετικά με την κλιματική αλλαγή. Για τον σκοπό της έρευνας, ακολουθήθηκε η ποσοτική μέθοδος με χρήση ηλεκτρονικού ερωτηματολογίου, σε δείγμα 200 πολιτών της Ελλάδας. Σύμφωνα με τα αποτελέσματα της παρούσας έρευνας, η πλειοψηφία των συμμετεχόντων έχουν από μέτριο έως και πολύ καλό επίπεδο ενημέρωσης για την κλιματική αλλαγή. Ιδιαίτερα επιβαρυντικά στοιχεία θεωρούν την καύση ορυκτών καυσίμων, την καταστροφή των δασών, τα οχήματα, τα ΜΜΜ και την ανθρώπινη υπερκατανάλωση. Κύριο αντίκτυπο αναφέρουν την αύξηση της θερμοκρασίας, καθώς και τις επιπτώσεις στο νερό, στην χλωρίδα και στην πανίδα του κόσμου. Σε ότι αφορά την ευαισθητοποίηση, η πλειοψηφία δήλωσε πως έχει προβεί σε αλλαγές στην καθημερινότητα προκειμένου να συνεισφέρει στην αντιμετώπιση της κλιματικής αλλαγής. Το δείγμα αναγνωρίζει τα οφέλη της πανδημίας covid – 19 στις συνήθειες των νοικοκυριών για την αντιμετώπιση της κλιματικής αλλαγής. Τέλος, προέκυψαν διαφοροποιήσεις ως προς τα δημογραφικά στοιχεία σε σχέση με την ευαισθητοποίηση απέναντι στην κλιματική αλλαγή και σε σχέση με τις αλλαγές του κοινού στην καθημερινότητα του, προς όφελος της κλιματικής αλλαγής.
Quantification of fecal short chain fatty acids by liquid chromatography tandem mass spectrometry – investigation of preanalytic stability
Creators: name: Liebisch, Gerhard
name: Ecker, Josef
name: Roth, Sebastian
name: Schweizer, Sabine
name: Öttl, Veronika
name: Schött, Hans-Frieder
name: Holler, Ernst
name: Burkhardt, Ralph
name: Matysik, Silke
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: SCFA; mass spectrometry; feces; LC-MS/MS; method validation
subject: 610 Medizin

description: Short chain fatty acids (SCFAs) are generated by the degradation and fermentation of complex carbohydrates, (i.e., dietary fiber) by the gut microbiota relevant for microbe–host communication. Here, we present a method for the quantification of SCFAs in fecal samples by liquid chromatography tandem mass spectrometry (LC-MS/MS) upon derivatization to 3-nitrophenylhydrazones (3NPH). The method includes acetate, propionate, butyrate, and isobutyrate with a run time of 4 min. The reproducible (coefficients of variation (CV) below 10%) quantification of SCFAs in human fecal samples was achieved by the application of stable isotope labelled internal standards. The specificity was demonstrated by the introduction of a quantifier and qualifier ions. The method was applied to investigate the pre-analytic stability of SCFAs in human feces. Concentrations of SCFA may change substantially within hours; the degree and kinetics of these changes revealed huge differences between the donors. The fecal SCFA level could be preserved by the addition of organic solvents like isopropanol. An analysis of the colon content of mice either treated with antibiotics or fed with a diet containing a non-degradable and -fermentable fiber source showed decreased SCFA concentrations. In summary, this fast and reproducible method for the quantification of SCFA in fecal samples provides a valuable tool for both basic research and large-scale studies.
title: Ανίχνευση απορριμμάτων σε παράκτιες περιοχές με χρήση μη επανδρωμένου θαλάσσιου οχήματος (USV)
title: Litter detection in coastal areas using an unmanned marine vehicle (USV)
titleType: AlternativeTitle
Creators: name: Κουράκη, Δήμητρα
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Θαλάσσια ρύπανση
Μη επανδρωμένο όχημα
Απορρίμματα

description: Το ζήτημα των θαλάσσιων απορριμμάτων έχει αποτελέσει σημαντική ανησυχία παγκοσμίως, με καταστροφικές συνέπειες για το περιβάλλον και τη θαλάσσια ζωή. Οι παραδοσιακές μέθοδοι εντοπισμού θαλάσσιων απορριμμάτων, όπως και οι οπτικές έρευνες και οι χειροκίνητες επιθεωρήσεις, χρησιμοποιούνται εδώ και δεκαετίες, αλλά έχουν περιορισμούς όσον αφορά την ακρίβεια, την αποτελεσματικότητα και τη σχέση κόστους- αποτελεσματικότητας. Ωστόσο, η εμφάνιση μη επανδρωμένων οχημάτων για την ανίχνευση θαλάσσιων απορριμμάτων έχει παρουσιάσει νέες ευκαιρίες για την βελτίωση της ακρίβειας και της αποτελεσματικότητας της ανίχνευσης και χαρτογράφησης των θαλάσσιων απορριμμάτων. Η χρήση μη επανδρωμένων οχημάτων προσφέρει πολλά πλεονεκτήματα, όπως αυξημένη ακρίβεια, αποτελεσματικότητα, αποδοτικότητα και μειωμένες περιβαλλοντικές επιπτώσεις. Υπό το πρίσμα αυτών των πλεονεκτημάτων, συνιστάται σε οργανισμούς και ομάδες που ασχολούνται με την ανίχνευση και διατήρηση των θαλάσσιων απορριμμάτων να εξετάσουν το ενδεχόμενο ενσωμάτωσης μη επανδρωμένων οχημάτων στις μεθόδους τους. Η παρούσα μελέτη, αναλύει τις παραδοσιακές και μη επανδρωμένες μεθόδους εντοπισμού θαλάσσιων απορριμμάτων και παρουσιάζει μια πρόταση για τη χρήση μη επανδρωμένων οχημάτων για τον εντοπισμό και τη χαρτογράφηση θαλάσσιων απορριμμάτων.
Collagen Type I Conduits for the Regeneration of Nerve Defects
Creators: name: Klein, Silvan
name: Vykoukal, J.
name: Felthaus, Oliver
name: Dienstknecht, T.
name: Prantl, Lukas
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: CLINICAL-EXPERIENCE; ULNAR NERVES; REPAIR; RECONSTRUCTION; FOREARM; BIOMATERIALS; SURGERY; INJURY; HAND; QUESTIONNAIRE; Type I collagen nerve conduit; biocompatibility; peripheral nerve repair
subject: 610 Medizin

description: To date, reliable data to support the general use of biodegradable materials for bridging nerve defects are still scarce. We present the outcome of nerve regeneration following type I collagen conduit nerve repair in patients with large-diameter nerve gaps. Ten patients underwent nerve repair using a type I collagen nerve conduit. Patients were re-examined at a minimal follow-up of 14.0 months and a mean follow-up of 19.9 months. Regeneration of nerve tissue within the conduits was assessed by nerve conduction velocity (NCV), a static two-point discrimination (S2PD) test, and as disability of arm shoulder and hand (DASH) outcome measure scoring. Quality of life measures including patients' perceived satisfaction and residual pain were evaluated using a visual analog scale (VAS). No implant-related complications were observed. Seven out of 10 patients reported being free of pain, and the mean VAS was 1.1. The mean DASH score was 17.0. The S2PD was below 6 mm in 40%, between 6 and 10 mm in another 40% and above 10 mm in 20% of the patients. Eight out of 10 patients were satisfied with the procedure and would undergo surgery again. Early treatment correlated with lower DASH score levels. The use of type I collagen in large-diameter gaps in young patients and early treatment presented superior functional outcomes.
A Note on the Sagnac Effect and Current Terrestrial Experiments
Creators: name: Ruggiero, Matteo Luca
name: Tartaglia, Angelo
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We focus on the Sagnac effect for light beams in order to evaluate if the higher order relativistic corrections of kinematic origin could be relevant for actual terrestrial experiments. Moreover, we discuss to what extent the analogy with the Aharonov-Bohm effect holds true in a fully relativistic framework. We show that the analogy with the Aharonov-Bohm is not true in general, but is recovered in a suitable low order approximation, and that even though the Sagnac effect is influenced by both the position of the interferometer in the rotating frame and its extension, these effects are negligible for current terrestrial experiments.
description: 5 pages, revised to match the version accepted for publication in The European Physical Journal - Plus
OWNERSHIP TRANSFORMATIONS IN AGRICULTURE IN THE YEARS 1992-2020
Creators: name: BOŻENA, TAŃSKA-HUS
name: BARBARA, KUTKOWSKA
name: BOŻENA, TAŃSKA-HUS
name: BARBARA, KUTKOWSKA
Publisher: name: Unknown
Year: 2022
Subjects: subject: Land Economics/Use
subject: Agricultural Property Agency (APA)
subject: transformations
subject: land sale
subject: land lease
subject: land area

description: The aim of the article was to describe the process of ownership transformations carried out in the years 1992-2020. It addresses economic determinants for the establishment of the Agricultural Property Agency of the State Treasury (APAST) Agricultural Property Agency (APA) as well as its tasks aimed at implementing these transformations. The analysis covered two transformation periods, namely the years 1992-1996 and 2000-2020. The research applied descriptive and descriptive–comparative methods as well as statistical descriptive and also a tabular technique. The basic source of research materials was the source literature and statistical data from the Agricultural Property Agency (APA), the National Support Centre for Agriculture (NSCA) reports and the studies published in Institute of Agricultural and Food Economics (IAFE) entitled “The Market of Agricultural Land”. It was attempted to define the role of land sale and land lease in this process. The changes which occurred in the leased and sold land were also indicated. The legal regulations in force regarding property turnover were discussed, pointing to the limitations resulting from these legal acts in the implementation of transformations. The research showed that both sale and lease played an important role in transformations in various periods of the APAST/APA functioning.
Exciton spin noise in quantum wells
Creators: name: Smirnov, D. S.
name: Glazov, M. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A theory of spin fluctuations of excitons in quantum wells in the presence of non-resonant excitation has been developed. Both bright and dark excitonic states have been taken into account. The effect of a magnetic field applied in a quantum well plane has been analyzed in detail. We demonstrate that in relatively small fields the spin noise spectrum consists of a single peak centered at a zero frequency while an increase of magnetic field results in the formation of the second peak in the spectrum owing to an interplay of the Larmor effect of the magnetic field and the exchange interaction between electrons and holes forming excitons. Experimental possibilities to observe the exciton spin noise are discussed, particularly, by means of ultrafast spin noise spectroscopy. We show that the fluctuation spectra contain, in addition to individual contributions of electrons and holes, an information about correlation of their spins.
description: 9 pages, 4 figures, Sec. IIB revised, Appendix added
The operadic modeling of gauge systems of the Yang-Mills type
Creators: name: Paal, Eugen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The basics of operadic variational formalism is presented which is necessary when modeling the operadic systems. A general gauge theoretic approach to the abstract operads, based on the physical measurements concepts, is justified and considered. It is explained how the matrix and Poisson algebra relations can be extended to operadic realm. The tangent cohomology spaces of the binary associative flows with their Gerstenhaber algebra structure can be seen as equally natural objects for operadic modeling, just as the matrix and Poisson algebras in conventional modeling. In particular, the relation of the tangent Gerstenhaber algebras to operadic Stokes law for operadic observables is revealed and discussed. Based on this, the rational (cohomological) variational principle and operadic Heisenberg equation for quantum operadic flows are stated. As a modeling selection rule, the operadic gauge equations of the Yang-Mills type are considered and justified from the point of view of the physical measurements and the algebraic deformation theory. It is also shown how the binary weakly non-associative operations are related to approximate operadic (anti-)self-dual models.
description: 12pp, LaTeX2e, 1 Fig, 36 Refs. v8: presentation essentially improved, misprints corrected
Supplementary informations from Aggregation in an heterospecific population of blow-fly larvae: social behaviour is impacted by species-specific thermal requirements and settlement order
Creators: name: CHARABIDZE, Damien
name: Aubernon, Cindy
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: 60801 Animal Behaviour

description: Temperature inside the setup and 4h control results
Constraining Sterile Neutrinos Using Reactor Neutrino Experiments
Creators: name: Girardi, Ivan
name: Meloni, Davide
name: Ohlsson, Tommy
name: Zhang, He
name: Zhou, Shun
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Models of neutrino mixing involving one or more sterile neutrinos have resurrected their importance in the light of recent cosmological data. In this case, reactor antineutrino experiments offer an ideal place to look for signatures of sterile neutrinos due to their impact on neutrino flavor transitions. In this work, we show that the high-precision data of the Daya Bay experi\-ment constrain the 3+1 neutrino scenario imposing upper bounds on the relevant active-sterile mixing angle $\sin^2 2 θ_{14} \lesssim 0.06$ at 3$σ$ confidence level for the mass-squared difference $Δm^2_{41}$ in the range $(10^{-3},10^{-1}) \, {\rm eV^2}$. The latter bound can be improved by six years of running of the JUNO experiment, $\sin^22θ_{14} \lesssim 0.016$, although in the smaller mass range $ Δm^2_{41} \in (10^{-4} ,10^{-3}) \, {\rm eV}^2$. We have also investigated the impact of sterile neutrinos on precision measurements of the standard neutrino oscillation parameters $θ_{13}$ and $Δm^2_{31}$ (at Daya Bay and JUNO), $θ_{12}$ and $Δm^2_{21}$ (at JUNO), and most importantly, the neutrino mass hierarchy (at JUNO). We find that, except for the obvious situation where $Δm^2_{41}\sim Δm^2_{31}$, sterile states do not affect these measurements substantially.
description: 23 pages, 9 figures, more discussions added, matches the published version
The Importance of Behavioural Studies and Bioacoustics of Aquatic Animals
Creators: name: Aminifard, Marziyeh
name: Shafiei Sabet, Saeed
Publisher: name: figshare
Year: 2022
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: There are growing concerns about monitoring scientific developments, building scientific capacity, and providing an introduction and overview of a new field of science for academia worldwide. The aim of this paper is to enhance promotion of science, steering undergraduate students and researchers in the field of behavioural studies, bioacoustics also cultivation of a new area of research. Although the technology to monitor acoustic changes and sound components is complex and limited, international scientific communications may play an important role and create the opportunity to overcome the limitations of this filed of research in Iran. In the other hand, cognitive processes, and concepts such as perception, learning, memory and decision making play an important role in mate choice, foraging and many other behaviours of aquatic animals. Here, we classify underwater sound sources and describe underwater bioacoustics. Moreover, we review some of our recent behavioural study publications in the field of research; give an overview of other relevant research contributions also compare laboratory-based studies with field-based behavioural studies. The authors suggest sound-related behavioural studies and a series of continuous monitoring of underwater acoustics in real field conditions and habitats but also acoustic measurements under laboratory conditions.
In vitro testing of scaffolds for mesenchymal stem cell-based meniscus tissue engineering – introducing a new biocompatibility scoring system
Creators: name: Achatz, Felix Paul
name: Kujat, Richard
name: Pfeifer, Christian G.
name: Koch, Matthias
name: Nerlich, Michael
name: Angele, Peter
name: Zellner, Johannes
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: POLYURETHANE SCAFFOLD; CLINICAL-OUTCOMES; FOLLOW-UP; REPAIR; MENISCECTOMY; KNEE; IMPLANT; DIFFERENTIATION; REGENERATION; PROGENITOR; meniscus; polyurethane scaffold; composite scaffold; hyaluronic acid; collagen; gelatin; chondrogenesis; human mesenchymal stem cells; biocompatibility
subject: 610 Medizin

description: A combination of mesenchymal stem cells (MSCs) and scaffolds seems to be a promising approach for meniscus repair. To facilitate the search for an appropriate scaffold material a reliable and objective in vitro testing system is essential. This paper introduces a new scoring for this purpose and analyzes a hyaluronic acid (HA) gelatin composite scaffold and a polyurethane scaffold in combination with MSCs for tissue engineering of meniscus. The pore quality and interconnectivity of pores of a HA gelatin composite scaffold and a polyurethane scaffold were analyzed by surface photography and Berliner-Blau-BSA-solution vacuum filling. Further the two scaffold materials were vacuum-filled with human MSCs and analyzed by histology and immunohistochemistry after 21 days in chondrogenic media to determine cell distribution and cell survival as well as proteoglycan production, collagen type I and II content. The polyurethane scaffold showed better results than the hyaluronic acid gelatin composite scaffold, with signs of central necrosis in the HA gelatin composite scaffolds. The polyurethane scaffold showed good porosity, excellent pore interconnectivity, good cell distribution and cell survival, as well as an extensive content of proteoglycans and collagen type II. The polyurethane scaffold seems to be a promising biomaterial for a mesenchymal stem cell-based tissue engineering approach for meniscal repair. The new score could be applied as a new standard for in vitro scaffold testing.
Total Fatty Acid Analysis of Human Blood Samples in One Minute by High-Resolution Mass Spectrometry
Creators: name: Gallego, S. F.
name: Hermansson, M.
name: Liebisch, Gerhard
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: total fatty acid analysis; human blood plasma; shotgun lipidomics; high resolution mass spectrometry; Orbitrap
subject: 610 Medizin

description: Total fatty acid analysis is a routine method in many areas, including lipotyping of individuals in personalized medicine, analysis of foodstuffs, and optimization of oil production in biotechnology. This analysis is commonly done by converting fatty acyl (FA) chains of intact lipids into FA methyl esters (FAMEs) and monitoring these by gas-chromatography (GC)-based methods, typically requiring at least 15 min of analysis per sample. Here, we describe a novel method that supports fast, precise and accurate absolute quantification of total FA levels in human plasma and serum samples. The method uses acid-catalyzed transesterification with 18O-enriched H2O (i.e., H218O) to convert FA chains into 18O-labeled free fatty acids. The resulting “mass-tagged” FA analytes can be specifically monitored with improved signal-to-background by 1 min of high resolution Fourier transform mass spectrometry (FTMS) on an Orbitrap-based mass spectrometer. By benchmarking to National Institute of Standards and Technology (NIST) certified standard reference materials we show that the performance of our method is comparable, and at times superior, to that of gold-standard GC-based methods. In addition, we demonstrate that the method supports the accurate quantification of FA differences in samples obtained in dietary intervention studies and also affords specific monitoring of ingested stable isotope-labeled fatty acids (13C16-palmitate) in normoinsulinemic and hyperinsulinemic human subjects. Overall, our novel high-throughput method is generic and suitable for many application areas, spanning basic research to personalized medicine, and is particularly useful for laboratories equipped with high resolution mass spectrometers, but lacking access to GC-based instrumentation.
Exhausting the Information: Novel Bayesian Combination of Photometric Redshift PDFs
Creators: name: Kind, M. Carrasco
name: Brunner, R. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The estimation and utilization of photometric redshift probability density functions (photo-$z$ PDFs) has become increasingly important over the last few years and currently there exist a wide variety of algorithms to compute photo-$z$'s, each with their own strengths and weaknesses. In this paper, we present a novel and efficient Bayesian framework that combines the results from different photo-$z$ techniques into a more powerful and robust estimate by maximizing the information from the photometric data. To demonstrate this we use a supervised machine learning technique based on random forest, an unsupervised method based on self-organizing maps, and a standard template fitting method but can be easily extend to other existing techniques. We use data from the DEEP2 and the SDSS surveys to explore different methods for combining the predictions from these techniques. By using different performance metrics, we demonstrate that we can improve the accuracy of our final photo-$z$ estimate over the best input technique, that the fraction of outliers is reduced, and that the identification of outliers is significantly improved when we apply a Na\"ıve Bayes Classifier to this combined information. Our more robust and accurate photo-$z$ PDFs will allow even more precise cosmological constraints to be made by using current and future photometric surveys. These improvements are crucial as we move to analyze photometric data that push to or even past the limits of the available training data, which will be the case with the Large Synoptic Survey Telescope.
description: 21 pages, 19 figures, minor corrections, accepted for publication to MNRAS
title: Προβλέψεις χρονολογικών σειρών μέσω τεχνητών νευρωνικών δικτύων
title: Neural networks for time-series forecasting
titleType: AlternativeTitle
Creators: name: Χαϊδεμένος, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Νευρωνικά δίκτυα
subject: MLP
subject: CNN
subject: Χρονοσειρές

description: Η δυνατότητα προβλέψεων με βάση ιστορικά δεδομένα χρονοσειρών είναι πολύ σημαντική και έχει εφαρμογές σε πολλούς τομείς, όπως η οικονομετρία, τα χρηματοοικονομικά, το περιβάλλον, η βιολογία, οι τηλεπικοινωνίες και πολλοί άλλοι. Σκοπός αυτής της εργασίας είναι η λεπτομερής παρουσίαση ενός μεγάλου εύρους μεθόδων πρόβλεψης χρονοσειρών που βασίζονται σε τεχνητά νευρωνικά δίκτυα πρόσθιας τροφοδότησης (feed-forward neural networks). Πιο συγκεκριμένα, θα περιγραφούν και θα υλοποιηθούν αλγόριθμοι ανάπτυξης νευρωνικών δικτύων Συνέλιξης (Convolutional Neural Networks) και Πολυεπίπεδων Αντίληπτρων (Multilayer Perceptron). Tα δίκτυα αυτά θα εκπαιδευτούν χρησιμοποιώντας ιστορικά δεδομένα από τη χρονοσειρά του QQQ ETF της Invesco, η οποίο στοχεύει στο να αντιγράψει την πορεία του δείκτη Nasdaq-100. Επίσης, θα αξιοποιήσουμε και κάποιες από τις σημαντικότερες μετοχές που συμβάλουν στη διαμόρφωση αυτού του δείκτη. Η απόδοση των προβλέψεων των μοντέλων θα εξεταστεί εμπειρικά, και θα συγκριθεί με παραδοσιακές μεθόδους πρόβλεψης, όπως το υπόδειγμα ARIMA.
Higher Ratios of Hyaluronic Acid Enhance Chondrogenic Differentiation of Human MSCs in a Hyaluronic Acid–Gelatin Composite Scaffold
Creators: name: Pfeifer, Christian G.
name: Berner, Arne
name: Koch, Matthias
name: Krutsch, Werner
name: Kujat, Richard
name: Angele, Peter
name: Nerlich, Michael
name: Zellner, Johannes
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: MESENCHYMAL STEM-CELLS; AUTOLOGOUS CHONDROCYTE IMPLANTATION; ARTICULAR-CARTILAGE REPAIR; PORE-SIZE; TISSUE; MATRIX; KNEE; TRANSPLANTATION; HYDROGELS; DEFECTS; composite scaffold; hyaluronic acid; gelatin; chondrogenesis; human mesenchymal stem cells
subject: 610 Medizin

description: Mesenchymal stem cells (MSCs) seeded on specific carrier materials are a promising source for the repair of traumatic cartilage injuries. The best supportive carrier material has not yet been determined. As natural components of cartilage's extracellular matrix, hyaluronic acid and collagen are the focus of biomaterial research. In order to optimize chondrogenic support, we investigated three different scaffold compositions of a hyaluronic acid (HA)-gelatin based biomaterial. Methods: Human MSCs (hMSCs) were seeded under vacuum on composite scaffolds of three different HA-gelatin ratios and cultured in chondrogenic medium for 21 days. Cell-scaffold constructs were assessed at different time points for cell viability, gene expression patterns, production of cartilage-specific extracellular matrix (ECM) and for (immuno-) histological appearance. The intrinsic transforming growth factor beta (TGF-beta) uptake of empty scaffolds was evaluated by determination of the TGF-beta concentrations in the medium over time. Results: No significant differences were found for cell seeding densities and cell viability. hMSCs seeded on scaffolds with higher ratios of HA showed better cartilage-like differentiation in all evaluated parameters. TGF-beta uptake did not differ between empty scaffolds. Conclusion: Higher ratios of HA support the chondrogenic differentiation of hMSCs seeded on a HA-gelatin composite scaffold.
Ab initio calculation of the spectrum and structure of $^{16}$O
Creators: name: Epelbaum, Evgeny
name: Krebs, Hermann
name: Lähde, Timo A.
name: Lee, Dean
name: Meißner, Ulf-G.
name: Rupak, Gautam
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present ab initio lattice calculations of the low-energy even-parity states of $^{16}$O using chiral nuclear effective field theory. We find good agreement with the empirical energy spectrum, and with the electromagnetic properties and transition rates. For the ground state, we find that the nucleons are arranged in a tetrahedral configuration of alpha clusters. For the first excited spin-0 state, we find that the predominant structure is a square configuration of alpha clusters, with rotational excitations that include the first spin-2 state.
description: 4 pages, 4 figures, final version to appear in Phys. Rev. Lett
Novel population pharmacokinetic approach to explain the differences between cystic fibrosis patients and healthy volunteers via protein binding
Creators: name: Shah, Nirav R.
name: Bulitta, J. B.
name: Kinzig, M.
name: Kees, Frieder
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: cystic fibrosis patients; healthy volunteers; cefotiam; beta-lactam antibiotics; population pharmacokinetics; protein binding; allometric scaling; body size; body composition; S-ADAPT
subject: 540 Chemie

description: The pharmacokinetics in patients with cystic fibrosis (CF) has long been thought to differ considerably from that in healthy volunteers. For highly protein bound β-lactams, profound pharmacokinetic differences were observed between comparatively morbid patients with CF and healthy volunteers. These differences could be explained by body weight and body composition for β-lactams with low protein binding. This study aimed to develop a novel population modeling approach to describe the pharmacokinetic differences between both subject groups by estimating protein binding. Eight patients with CF (lean body mass [LBM]: 39.8 ± 5.4kg) and six healthy volunteers (LBM: 53.1 ± 9.5kg) received 1027.5 mg cefotiam intravenously. Plasma concentrations and amounts in urine were simultaneously modelled. Unscaled total clearance and volume of distribution were 3% smaller in patients with CF compared to those in healthy volunteers. After allometric scaling by LBM to account for body size and composition, the remaining pharmacokinetic differences were explained by estimating the unbound fraction of cefotiam in plasma. The latter was fixed to 50% in male and estimated as 54.5% in female healthy volunteers as well as 56.3% in male and 74.4% in female patients with CF. This novel approach holds promise for characterizing the pharmacokinetics in special patient populations with altered protein binding.
Specific wheat fractions influence hepatic fat metabolism in diet-induced obese mice
Creators: name: Graf, Daniela
name: Weitkunat, K.
name: Dötsch, A.
name: Liebisch, Gerhard
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: wheat; whole grain; bran; aleurone; microbiota; SCFA; lipid metabolism; obesity
subject: 610 Medizin

description: Low whole grain consumption is a risk factor for the development of non-communicable diseases such as type 2 diabetes. Dietary fiber and phytochemicals are bioactive grain compounds, which could be involved in mediating these beneficial effects. These compounds are not equally distributed in the wheat grain, but are enriched in the bran and aleurone fractions. As little is known on physiological effects of different wheat fractions, the aim of this study was to investigate this aspect in an obesity model. For twelve weeks, C57BL/6J mice were fed high-fat diets (HFD), supplemented with one of four wheat fractions: whole grain flour, refined white flour, bran, or aleurone. The different diets did not affect body weight, however bran and aleurone decreased liver triglyceride content, and increased hepatic n-3 polyunsaturated fatty acid (PUFA) concentrations. Furthermore, lipidomics analysis revealed increased PUFA concentration in the lipid classes of phosphatidylcholine (PC), PC-ether, and phosphatidylinositol in the plasma of mice fed whole grain, bran, and aleurone supplemented diets, compared to refined white flour. Furthermore, bran, aleurone, and whole grain supplemented diets increased microbial α-diversity, but only bran and aleurone increased the cecal concentrations of short-chain fatty acids. The effects on hepatic lipid metabolism might thus at least partially be mediated by microbiota-dependent mechanisms.
Ultracold mixtures of metastable He and Rb: scattering lengths from ab initio calculations and thermalization measurements
Creators: name: Knoop, S.
name: Żuchowski, P. S.
name: Kȩdziera, D.
name: Mentel, Ł.
name: Puchalski, M.
name: Mishra, H. P.
name: Flores, A. S.
name: Vassen, W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We have investigated the ultracold interspecies scattering properties of metastable triplet He and Rb. We performed state-of-the-art ab initio calculations of the relevant interaction potential, and measured the interspecies elastic cross section for an ultracold mixture of metastable triplet $^4$He and $^{87}$Rb in a quadrupole magnetic trap at a temperature of 0.5 mK. Our combined theoretical and experimental study gives an interspecies scattering length $a_{4+87}=+17^{+1}_{-4}$ $a_0$, which prior to this work was unknown. More general, our work shows the possibility of obtaining accurate scattering lengths using ab initio calculations for a system containing a heavy, many-electron atom, such as Rb.
description: 11 pages, 11 figures, accepted for publication in Phys. Rev. A
Antidiabetic, tyrosinase inhibitory, and free radical scavenging activitiesof the purified extracts from Morinda citrifolia unripe fruits
Creators: name: Jintana Masoongnoen
name: Sompong Sansenya
name: Kongaphisith Tongpoolsomjit
name: Jarupa Viyoch
name: Kanokorn Wechakorn
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: Morinda citrifolia unripe fruit extract
tyrosinase inhibition
glucosidase inhibition
amylase inhibition
free radical scavenging

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 735-743
Physicochemical properties, techno-functionality,and resistant starch of green fragrant banana flour
Creators: name: Kunchaporn Thawornlamlert
name: Areerat Nonsawang
name: Jirarat Anuntagool
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: fragrant banana
Gros Michel
resistant starch
green banana flour

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 744-751
Vanishing superconformal indices and the chiral symmetry breaking
Creators: name: Spiridonov, V. P.
name: Vartanov, G. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Superconformal indices of 4d \N=1 SYM theories with SU(N) and SP(2N) gauge groups are investigated for N_f=N and N_f=N+1 flavors, respectively. These indices vanish for generic values of the flavor fugacities. However, for a singular submanifold of fugacities they behave like the Dirac delta functions and describe the chiral symmetry breaking phenomenon. Similar picture holds for partition functions of 3d supersymmetric field theories with the chiral symmetry breaking.
description: 26 pp
Immunprivileg des Auges: Ca2+ -Signaling der äußeren Blut-Retina-Schranke
Creators: name: Reichhart, Nadine
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2023
Subjects: subject: RPE
subject: blood-retina-barrier
subject: VEGF
subject: Ca2+ -Signaling
subject: secretion
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Ca2+ fungiert als elementares Signalmolekül der Zelle. Der zeitliche und räumliche Verlauf eines Ca2+-Signals bestimmt seine Wirkung auf die Zellfunktion. Wesentliche, durch Ca2+ gesteuerte Funktionen des RPE sind Ionentransport, Phagozytose von Photorezeptoraußensegmenten und Sekretion. In der vorliegenden Arbeit wurde das Verständnis der komplexen Vorgänge des Ca2+-Signaling im RPE wesentlich verbessert. Die Modulation von 2 Ionenkanälen, die den Ca2+-Spiegel in RPE Zellen erhöhen, TRPV2 und CaV1.3, wurde beleuchtet. Hier kam es zu erhöhter Membranoberflächenexpression sowie Veränderungen wesentlicher elektrophysiologischer Parameter wie Stromdichte und Aktivierungspotential. Zudem wurden mit Ano2 und Ano4 molekulare Korrelate für den Ca2+-abhängigen Cl--Kanal bzw. Ca2+-abhängigen Kationenkanal in der basolateralen Membran des RPE identifiziert. Als Ca2+-abhängige Mechanismen wurde neben dem Ionentransport ein Fokus auf die Sekretion von pro-angiogenen und pro-inflammatorischen Komponenten VEGF-A und PGF gelegt. Somit konnte eine Brücke geschlagen werden von der Analyse zellphysiologischer Mechanismen zu Pathomechanismen bei verschiedenen retinalen Erkrankungen mit inflammatorischer und angiogener Komponente wie zum Beispiel diabetischer Retinopathie (DR) und Altersabhängiger Makuladegeneration (AMD). Das RPE fungiert hier als „educational barrier“: bei Inflammation kommt es nicht zum Versagen der Barriere, sondern vielmehr zu einer orchestrierten Reaktion, bestehend aus ionalen und zellulären Mechanismen. Autokrine und endokrine Sekretion von proinflammatorischen und pro-angiogenen Faktoren spielt hier ebenso eine Rolle wie die Interaktion mit zellulären Komponenten der angeborenen und adaptiven Immunantwort. Hieraus leitet sich die Notwendigkeit ab zukünftige Therapiestrategien für DR und AMD nicht primär auf die Effektoren wie Endothelzellen oder Entzündungszellen zu konzentrieren, sondern die pathophysiologischen Prozesse im Zentrum, dem RPE zu adressieren/modulieren.
Biological CO2-Methanation: an Approach to Standardization
Creators: name: Thema, M.
name: Weidlich, T.
name: Hörl, M.
name: Bellack, Annett
name: Huber, Harald
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: methanation; standardization; biological methanation; CO2-methanation; power-to-gas; power-to-methane; trickle-bed reactor; CSTR; bubble column reactor; membrane reactor
subject: 570 Biowissenschaften, Biologie

description: Power-to-Methane as one part of Power-to-Gas has been recognized globally as one of the key elements for the transition towards a sustainable energy system. While plants that produce methane catalytically have been in operation for a long time, biological methanation has just reached industrial pilot scale and near-term commercial application. The growing importance of the biological method is reflected by an increasing number of scientific articles describing novel approaches to improve this technology. However, these studies are difficult to compare because they lack a coherent nomenclature. In this article, we present a comprehensive set of parameters allowing the characterization and comparison of various biological methanation processes. To identify relevant parameters needed for a proper description of this technology, we summarized existing literature and defined system boundaries for Power-to-Methane process steps. On this basis, we derive system parameters providing information on the methanation system, its performance, the biology and cost aspects. As a result, three different standards are provided as a blueprint matrix for use in academia and industry applicable to both, biological and catalytic methanation. Hence, this review attempts to set the standards for a comprehensive description of biological and chemical methanation processes.
Bipartite entanglement dynamics of two-level systems in sub-Ohmic reservoirs
Creators: name: Kast, Denis
name: Ankerhold, Joachim
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum dynamics of pairs of two level systems immersed in dissipative reservoirs with sub-Ohmic spectral distributions is studied by means of numerically exact path integral Monte Carlo methods. It is shown that this class of reservoirs, relevant for generic properties of strongly non-Markovian environments with possible realizations in solid state structures at cryogenic temperatures, supports bipartite entanglement in broad ranges of parameter space and even for broken symmetries and in presence of thermal noise. The sensitivity of creation of entanglement in non-equilibrium on initial preparations of the reservoir is investigated in detail.
description: 5 pages, 5 figures. Submitted to PRB as rapid communication
Early Changes in Pain Acceptance Predict Pain Outcomes in Interdisciplinary Treatment for Chronic Pain
Creators: name: Probst, Thomas
name: Jank, R.
name: Dreyer, Nele
name: Seel, Stefanie
name: Mühlberger, Andreas
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: chronic pain; pain acceptance; early change; interdisciplinary pain treatment
subject: 150 Psychologie

description: Studies have shown that pain acceptance is associated with a better pain outcome. The current study explored whether changes in pain acceptance in the very early treatment phase of an interdisciplinary cognitive-behavioral therapy (CBT)-based treatment program for chronic pain predict pain outcomes. A total of 69 patients with chronic, non-malignant pain (at least 6 months) were treated in a day-clinic for four-weeks. Pain acceptance was measured with the Chronic Pain Acceptance Questionnaire (CPAQ), pain outcomes included pain intensity (Numeric Rating Scale, NRS) as well as affective and sensory pain perception (Pain Perception Scale, SES-A and SES-S). Regression analyses controlling for the pre-treatment values of the pain outcomes, age, and gender were performed. Early changes in pain acceptance predicted pain intensity at post-treatment measured with the NRS (B = −0.04 (SE = 0.02); T = −2.28; p = 0.026), affective pain perception at post-treatment assessed with the SES-A (B = −0.26 (SE = 0.10); T = −2.79; p = 0.007), and sensory pain perception at post-treatment measured with the SES-S (B = −0.19 (SE = 0.08); T = −2.44; p = 0.017). Yet, a binary logistic regression analysis revealed that early changes in pain acceptance did not predict clinically relevant pre-post changes in pain intensity (at least 2 points on the NRS). Early changes in pain acceptance were associated with pain outcomes, however, the impact was beneath the threshold defined as clinically relevant.
The small and large D limit of Parikh-Wilczek tunneling model for Hawking radiation
Creators: name: Wei, June-Yu
name: Wen, Wen-Yu
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this note, we study both the small and large dimension $D$ limit of the tunneling model of Hwaking radiation proposed by Parikh and Wilczek\cite{Parikh:1999mf}. We confirm that the result $Γ\sim e^{ΔS}$ is still valid for arbitrary $D>3$. The sensible large $D$ limit is given by $\sqrt{D} \ll r_0$ in order to have nonzero radiation. On the other hand, the sensible small $D$ limit is given by taking $D=3+ε$ as a continuous parameter. We also explicitly show the leading order correction to the thermal radiation and discuss its connection to the two-dimensional dilaton gravity.
description: 7 pages, updated version submitted to CQG
Altered processing of food stimuli in adolescents with loss of control eating
Creators: name: Biehl, Stefanie C.
name: Ansorge, U.
name: Naumann, Eva
name: Svaldi, J.
Publisher: name: Universität Regensburg
Year: 2019
Subjects: subject: loss of control eating; adolescents; event-related potentials; P3; Go/NoGo task; visual food stimuli
subject: 150 Psychologie

description: Loss of control eating (LOC) constitutes a common eating pathology in childhood and adolescence. Models developed for adult patients stress a biased processing of food-related stimuli as an important maintaining factor. To our knowledge, however, no EEG study to date investigated the processing of visual food stimuli in children or adolescents with LOC. Adolescents with at least one self-reported episode of LOC in the last four weeks and a matched control group completed a modified Go/NoGo task, with a numerical target or non-target stimulus being presented on one side of the screen and an irrelevant high-calorie food or neutral stimulus being presented on the opposite side. Mean P3 amplitudes were analyzed. In Go trials, the LOC group’s mean P3 amplitudes were comparable irrespective of distractor category, while for NoGo trials, mean P3 amplitudes were significantly higher when the distractor was a high-calorie food stimulus. This pattern was reversed in the control group. Results are interpreted in light of Gray’s reinforcement sensitivity theory. They might reflect altered processes of behavioral inhibition in adolescents with LOC upon confrontation with visual food stimuli.
Paleoseismicity of the Alpine foreland: the Upper Rhine Graben
Creators: name: Reicherter, Klaus
name: Ritter, Joachim R. R.
name: Hürtgen, Jochen
name: Pena-Castellnou, Sara
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Paleoseismicity
subject: Upper Rhine Graben
subject: 500 Natural sciences and mathematics::550 Earth sciences::550 Earth sciences

description: The Upper Rhine Graben faults in Central Europe are known for significant seismic activity within the Earth's crust, even though they are located within a tectonic plate, in an intraplate setting. This region has experienced destructive earthquakes throughout history, such as the 1356 Basel earthquake amongst others, which had a magnitude below 7 on the Richter scale. In recent decades, several research initiatives have assessed the seismic hazard associated with the Rhine Graben. These efforts primarily concentrated on investigating the western edges of the graben, where Late Pleistocene to Early Holocene faults that ruptured the surface during earthquakes were identified. However, the use of "period and characteristic" fault models in earthquake geology has led to incomplete estimates of the faulting history and the seismic potential of these faults. Our research is designed to comprehensively characterize the seismogenic faults within the Rhine Graben by examining their recent geological activity and creating a chronological record of seismic events along each fault or fault segment. Our approach involves several methods, including geomorphological mapping of fault features, studying the deposits from the Quaternary period, trenching to investigate paleoseismic evidence, and employing various morphometric parameters to delineate the segmentation of these faults while considering long-term deformation. The data we have collected provide compelling evidence regarding the dynamic behavior of these faults, allowing us to define specific areas with varying levels of tectonic activity formerly not known. We conducted trenching activities at several key sites for paleoseismological investigations, including comprehensive geophysical surveys conducted in the Upper Rhine Graben. Notably, our findings include the discovery of surface rupturing earthquakes near Karlsruhe (Ettlingen) and Freiburg (Tunsel), offering the initial evidence of tectonic activity during the Late Pleistocene and Holocene periods, with magnitudes exceeding M 6 on the Richter scale. Consequently, our research significantly, hence we contribute significantly to the completeness of the earthquake history in this region North of the Alps.
Nanggulan formation as a roof pendant at the central part ofKulon Progo Mountains, Yogyakarta, Indonesia
Creators: name: Winarti
name: Rizqi, Al Hussein Flowers
name: Sukiyah, Emi
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: roof pendant
metasediment
fragments
dike
alteration

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 752-759
Supplementary Materials 2 from Network structure of avian mixed-species flocks decays with elevation and latitude across the Andes
Creators: name: Montaño-Centellas, Flavia A.
name: Muñoz, Jenny
name: Mangini, Gabriela Giselle
name: Ausprey, Ian J.
name: Newell, Felicity L.
name: Jones, Harrison H.
name: Fanjul, M. Elisa
name: Tinoco, Boris A.
name: Colorado Z., Gabriel J.
name: Cahill, Jennifer R. A.
name: Arbeláez-Cortés, E.
name: Marin-Gómez, Oscar H.
name: Astudillo, Pedro X.
name: Guevara, Esteban A.
name: Ippi, Silvina
name: McDermott, Molly E.
name: Rodewald, Amanda D.
name: Matthysen, Erik
name: Robinson, Scott K.
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Data Sources