cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Particle acceleration in shearing flows: the self-generation of turbulent spine-sheath structures in relativistic MHD jet simulations
Creators: name: Wang, Jie-Shuang
name: Reville, Brian
name: Mizuno, Yosuke
name: Rieger, Frank M.
name: Aharonian, Felix A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray observations of several kiloparsec-scale extragalactic jets favour a synchrotron origin. The short cooling times of the emitting electrons requires distributed acceleration of electrons up to sub-PeV energies. In a previous paper, we found that this can be self-consistently explained by a shear acceleration model, where particles are accelerated to produce power-law spectra with a spectral index being determined mainly by the velocity profile and turbulence spectrum. In this paper, we perform 3D relativistic magneto-hydrodynamic simulations to investigate the formation of a spine-sheath structure and the development of turbulence for a relativistic jet propagating into a static cocoon. We explore different spine velocities and magnetic field profiles with values being chosen to match typical Fanaroff-Riley type I/II jets. We find that in all cases a sheath is generated on the interface of the spine and the cocoon mainly due to the Kelvin-Helmholtz instability. The large scale velocity profile in the sheath is close to linear. Turbulence develops in both the spine and the sheath, with a turbulent velocity spectrum consistent with Kolmogorov-scaling. The implications for shear particle acceleration are explored, with a focus on the particle spectral index.
description: 9 pages, 11 figures, 1 table, accepted for publication in MNRAS
Sonnenfleckenzeichnung Nr. 27554.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.06.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
title: Ενεργειακή προσομοίωση μεταβατικής λειτουργίας συστήματος τρι-συμπαραγωγής συνδυασμένου κύκλου με καύση φυσικού αερίου
titleType: AlternativeTitle
Creators: name: Ζώγου, Ολυμπία
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΘΕΡΜΟΔΥΝΑΜΙΚΗ
subject: ΠΗΓΕΣ ΕΝΕΡΓΕΙΑΣ -- ΕΡΕΥΝΑ

description: Η συμπαραγωγή ηλεκτρικής - θερμικής - ψυκτικής ισχύος διεισδύει όλο και περισσότερο στην παγκόσμια αγορά ενέργειας. Στην εργασία παρουσιάζεται η χρήση της δυναμικής προσομοίωσης στο σχεδίασμά συστημάτων συμπαραγωγής. Παραδοσιακά ο σχεδιασμός αυτών των συστημάτων γίνεται με βάση τυπικές τιμές των χαρακτηριστικών μόνιμης λειτουργίας τους. Η δυναμική προσομοίωση εισάγεται με στόχο την βελτίωση του σχεδιασμού των συστημάτων συμπαραγωγής, ώστε να λαμβάνει υπόψη τις ημερήσιες και εποχιακές διακυμάνσεις της παραγωγής και ζήτησης ηλεκτρικής, θερμικής και ψυκτικής ισχύος. Το σύστημα συμπαραγωγής που μελετάται βασίζεται σε συνδυασμένο κύκλο αεριοστροβίλου - ατμοστροβίλων, με ενδιάμεση απομάστευση ατμού διεργασίας, καθώς και εκμετάλλευση θερμικής ισχύος σε διάφορα επίπεδα θερμοκρασιών. Για την ανάπτυξη του μοντέλου δυναμικής προσομοίωσης συμπαραγωγής χρησιμοποιήσαμε τα ενεργειακά δεδομένα του Νοσοκομείου του Βόλου. Παρουσιάζεται αναλυτικά το σύστημα συμπαραγωγής καθώς και τα επιμέρους δομικά στοιχεία (components) του ενεργειακού συστήματος. Επίσης παρουσιάζονται και σχολιάζονται αποτελέσματα από την ενεργειακή προσομοίωση στη διάρκεια ενός τυπικού μετεωρολογικού έτους καθώς και οι θερμοδυναμικοί συντελεστές που επηρεάζουν τον σχεδίασμά και την βελτιστοποίηση του. Τέλος παρουσιάζεται μία συγκριτική παραμετρική ανάλυση διαφορετικού μεγέθους συστημάτων, καθώς και μια απλή οικονομική ανάλυση της απόδοσής τους με στόχο την κατάδειξη της βέλτιστης λύσης.
A Proposed Framework for Development of a Visualizer Based on Memory Transfer Language (MTL)
Creators: name: Nyamawe, Ally S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Computer programming is among the fundamental aspects of computer science curriculum. Many students first introduced to introductory computer programming courses experience difficulties in learning and comprehending. Vast amount of researches have revealed that, generally programming courses are regarded as difficult and challenging and thus often have the highest dropout rates. Moreover, numerous researches have devoted in delivering new approaches and tools in enhancing the process of teaching and learning computer programming to novice programmers. One among the tools that have emerged to offer positive results is Program Visualization tool (Visualizer). Visualizers have shown remarkable contributions in facilitating novices to learn and comprehend computer programming. In addition to that, an approach to visualize codes execution, Memory Transfer Language (MTL), allows a novice to animate the code through paper and pencil mechanism without actively involving the machine. MTL depends on the concepts of RAM (Random Access Memory) to interpret the code line by line. Programming requires effort and special approach in the way it is learned and taught, thus this paper aimed at presenting a proposed framework for developing a visualizer that employs the use of MTL to enhance teaching and learning programming.
description: 5 Pages, 15 Figures, Published with International Journal of Computer Trends and Technology (IJCTT)
Photometric, Astrometric and Polarimetric observations of gravitational microlensing events
Creators: name: Sajadian, Sedighe
name: Rahvar, Sohrab
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The gravitational microlensing as a unique astrophysical tool can be used for studying the atmosphere of stars thousands of parsec far from us. This capability results from the bending of light rays in the gravitational field of a lens which can magnify the light of a background source star during the lensing. Moreover, one of properties of this light bending is that the circular symmetry of the source is broken by producing distorted images at either side of the lens position. This property makes the possibility of the observation of the polarization and the light centroid shift of images. Assigning vectors for these two parameters, they are perpendicular to each other in the simple and binary microlensing events, except in the fold singularities. In this work, we investigate the advantages of polarimetric and astrometric observations during microlensing events for (i) studying the surface of the source star and spots on it and (ii) determining the trajectory of source stars with respect to the lens. Finally we analyze the largest sample of microlensing events from the OGLE catalog and show that for almost ~ 4.3 per cent of events in the direction of the Galactic bulge, the polarization signals with large telescopes would be observable.
description: Accepted for publication by MNRAS
Sonnenfleckenzeichnung Nr. 27645.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.11.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Sonnenfleckenzeichnung Nr. 27621.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.09.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Synthetic Expertise
Creators: name: Fulbright, Ron
name: Walters, Grover
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We will soon be surrounded by artificial systems capable of cognitive performance rivaling or exceeding a human expert in specific domains of discourse. However, these cogs need not be capable of full general artificial intelligence nor able to function in a stand-alone manner. Instead, cogs and humans will work together in collaboration each compensating for the weaknesses of the other and together achieve synthetic expertise as an ensemble. This paper reviews the nature of expertise, the Expertise Level to describe the skills required of an expert, and knowledge stores required by an expert. By collaboration, cogs augment human cognitive ability in a human/cog ensemble. This paper introduces six Levels of Cognitive Augmentation to describe the balance of cognitive processing in the human/cog ensemble. Because these cogs will be available to the mass market via common devices and inexpensive applications, they will lead to the Democratization of Expertise and a new cognitive systems era promising to change how we live, work, and play. The future will belong to those best able to communicate, coordinate, and collaborate with cognitive systems.
description: 19 pages; 10 figures; 5 equations
Sonnenfleckenzeichnung Nr. 27486.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.03.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Coronavirus Geopolitics. A Reflection on the Russian Case
Creators: name: Scocozza, Carmen
Publisher: name: Universita' degli Studi di Salerno
Year: 2020
Subjects: Russia
Coronavirus
Geopolitics

description: The current pandemic has shown that, over and above the more immediate consequences to be tackled, such as the health emergency and the economic crisis, there are long-term effects that will require reflection at a global level. In this article, we will analyse how the fight against coronavirus has become an interesting test of whether the Russian Government can enjoy comparative advantages over Western democracies. In particular, we highlight how the global health emergency is being used by the Kremlin to fuel the Russian narrative on an energetic and resolute country, against a divided and weakened West, and to loudly invoke a different world order where Moscow could find new centrality.
Preliminary studies on selection indices for activating seedling growth in mangosteen (Garcinia mangostana L.)
Creators: name: Yusuf, L.M.
name: Kurien, S.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: Studies on selection indices for activating seedling growth in mangosteen were conducted in the central orchard at the main campus of Kerala Agricultural University. The present investigation was undertaken with the main aim of identifying some of the basic reasons for slow growth in mangosteen, and to address this problem by developing and identifying criteria to select the age of the mother plant, fruit, seed and seedling characters or direct selection indices at all four stages with respect to seedling growth. Mother plants of four distinct age groups were used in the study. Variables were generated using all fruit, seed and seedling characters such as fruit index, seed index and seedling index by principal component analysis (PCA). Using PCA and multiple regression analysis, prediction model was fitted for the three indices. Major fruit, seed and seedling characters were identified by stepwise regression. Hierarchial analysis was performed based on Euclidean distance to find the similarities between the four age groups. Discriminant function analysis was performed and six discriminant functions were fitted with corresponding D2 values to discriminate the six pairs involving the four age groups of the mother plants. For practical purposes, selection indices and best age group of mother plants are described in the work.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Unidirectional Rashba Spin Splitting in Single Layer WS$_{2(1-x)}$Se$_{2x}$ alloy
Creators: name: Zribi, Jihene
name: Pierucci, Debora
name: Bisti, Federico
name: Zheng, Biyuan
name: Avila, Josse
name: Khalil, Lama
name: Ernandes, Cyrine
name: Chaste, Julien
name: Oehler, Fabrice
name: Pala, Marco
name: Maroutian, Thomas
name: Hermes, Ilka
name: Lhuillier, Emmanuel
name: Pan, Anlian
name: Ouerghi, Abdelkarim
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Atomically thin two-dimensional (2D) layered semiconductors such as transition metal dichalcogenides (TMDs) have attracted considerable attention due to their tunable band gap, intriguing spin-valley physics, piezoelectric effects and potential device applications. Here we study the electronic properties of a single layer WS$_{1.4}$Se$_{0.6}$ alloys. The electronic structure of this alloy, explored using angle resolved photoemission spectroscopy, shows a clear valence band structure anisotropy characterized by two paraboloids shifted in one direction of the k-space by a constant in-plane vector. This band splitting is a signature of a unidirectional Rashba spin splitting with a related giant Rashba parameter of 2.8 0.7 eV . The combination of angle resolved photoemission spectroscopy with piezo force microscopy highlights the link between this giant unidirectional Rashba spin splitting and an in-plane polarization present in the alloy. These peculiar anisotropic properties of the WS$_{1.4}$Se$_{0.6}$ alloy can be related to local atomic orders induced during the growth process due the different size and electronegativity between S and Se atoms. This distorted crystal structure combined to the observed macroscopic tensile strain, as evidenced by photoluminescence, displays electric dipoles with a strong in-plane component, as shown by piezoelectric microscopy. The interplay between semiconducting properties, in-plane spontaneous polarization and giant out-of-plane Rashba spin-splitting in this two-dimensional material has potential for a wide range of applications in next-generation electronics, piezotronics and spintronics devices.
description: Nanotechnology (2022)
title: Χαρακτηριστικά μοναχικών κυμάτων σε ροή υγρού υμένα : η επίδραση της κλίσης
titleType: AlternativeTitle
Creators: name: Μπόκαρη, Ανδρομάχη
Publisher: name: University of Thessaly
Year: 2008
Subjects: subject: ΚΥΜΑΤΑ
subject: ΡΕΥΣΤΟΔΥΝΑΜΙΚΗ

description: Η ροή υγρού υμένα είναι σημείο αναφοράς για τη μηχανική των ρευστών καθώς αποτελεί αντικείμενο έρευνας για πλήθος επιστημόνων ανά τον κόσμο και πάνω της στηρίζονται πολλές βιομηχανικές εφαρμογές. Με τον όρο ροή υγρού υμένα εννοείται η ροή σε στοιβάδα πάχους πολύ μικρότερου σε σχέση με τα υπόλοιπα χαρακτηριστικά της μήκη. Η ευρεία χρήση της ροής υγρού υμένα οφείλεται στην ικανότητα της να μεταφέρει θερμότητα και μάζα σε χαμηλή υδραυλική αντίσταση. Χαρακτηριστικά παραδείγματα του πεδίου εφαρμογής της αποτελούν οι εξατμιστήρες/συμπυκνωτές και οι ατμοπαραγωγικές εγκαταστάσεις. Η παρούσα εργασία μελετά τα χαρακτηριστικά των μοναχικών κυμάτων που εμφανίζονται κατά τη ροή υγρού υμένα σε κεκλιμένο επίπεδο τοίχωμα δίνοντας έμφαση στην επίδραση της κλίσης. Για τα πειράματα χρησιμοποιήθηκε ιδιοκατασκευή του εργαστηρίου και το ρευστό ήταν νερό. Η μέθοδος συλλογής των δεδομένων είναι απεικόνιση με φθορισμό, κατά την οποία το υγρό εμπλουτίζεται με χρωστική και υπό την επίδραση υπεριώδους ακτινοβολίας εκπέμπει σε καθορισμένο ορατό μήκος κύματος. Η ένταση της εκπεμπόμενης ακτινοβολίας είναι ανάλογη του τοπικού πάχους του υμένα. Οι κυριότερες παράμετροι του προβλήματος είναι ο αριθμός Re, η κλίση του καναλιού και η συχνότητα της εξωτερικά επιβαλλόμενης διαταραχής. Στην παρούσα εργασία εξετάζονται κυρίως τα χαρακτηριστικά των διδιάστατων πλήρως ανεπτυγμένων μοναχικών κυμάτων. Παρατηρήθηκε ότι σε χαμηλές συχνότητες διαταραχής εμφανίζονται παρασιτικά κύματα. Επίσης, σε χαμηλές τιμές του αριθμού Re τα κύματα είναι διδιάστατα, ενώ σε υψηλότερες τιμές μεταβαίνουν σε τρισδιάστατες δομές. Αποδείχθηκε ότι το μήκος, το ύψος και η φασική ταχύτητα των διδιάστατων κυμάτων αυξάνονται με αύξηση του αριθμού Re και επαληθεύτηκε η γραμμική συσχέτιση μεταξύ των διαστατικών τιμών της φασικής ταχύτητας και του μέγιστου ύψους του κύματος. Τέλος, εξετάστηκε η αδιαστατοποίηση των αποτελεσμάτων, τόσο με το πάχος του υμένα και τη μέση ταχύτητα κατά Nusselt, όσο και με τα αντίστοιχα μεγέθη του υποστρώματος της ροής.
In vitro drought effects on morphological and physiological indices of two fig (Ficus carica L.) cultivars
Creators: name: Shekafandeh, A.
name: Hojati, S.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: In vitro responses of two fig cultivars, ‘Sabz’ and ‘Siah’, were evaluated in MS media containing four levels of polyethylene glycol (PEG) (0, 2, 4, 6%) as a simulation of water stress. The results showed that in Sabz cultivar, shoot length, shoot fresh and dry weights were 43, 36 and 25%, respectively, lower than control in drought treatments caused by 4% PEG, while the leaf area and specific leaf area were not significantly (P>0.05) affected. In Siah cultivar, shoot length, fresh and dry weights were 57, 58 and 40%, respectively, lower in stressed media in comparison to control. In contrast to Sabz cultivar, leaf area and specific leaf area of Siah cultivar were significantly reduced by addition of 6% PEG (56 and 21.5%, respectively). Naturally, the amount of proline in ‘Sabz’ was higher than in ‘Siah’ (81.8 µmole g-1 versus 16.7 µmole g-1). However, in both cultivars, with the addition of PEG in culture media, leaf proline content was increased, in comparison to control. With increasing PEG% in culture media, the amount of leaf soluble sugars content increased and the amount of starch decreased. The results show that ‘Siah’ is more sensitive to drought than ‘Sabz’ and that in vitro culture can be used to evaluate drought tolerance of cultivars.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Sonnenfleckenzeichnung Nr. 27666.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.12.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Renormalization of the Standard Model Effective Field Theory from Geometry
Creators: name: Helset, Andreas
name: Jenkins, Elizabeth E.
name: Manohar, Aneesh V.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: $S$-matrix elements are invariant under field redefinitions of the Lagrangian. They are determined by geometric quantities such as the curvature of the field-space manifold of scalar and gauge fields. We present a formalism where scalar and gauge fields are treated together, with a metric on the combined space of both types of fields. Scalar and gauge scattering amplitudes are given by the Riemann curvature $R_{ijkl}$ of this combined space, with indices $i,j,k,l$ chosen to be scalar or gauge indices depending on the type of external particle. One-loop divergences can also be computed in terms of geometric invariants of the combined space, which greatly simplifies the computation of renormalization group equations. We apply our formalism to the Standard Model Effective Field Theory (SMEFT), and compute the renormalization group equations for even-parity bosonic operators to mass dimension eight.
description: 40 pages, 8 tables, 1 figure
Sonnenfleckenzeichnung Nr. 27589.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 07.08.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g)
Torsional Alfven waves and the period ratio P_1/P_2 in spicules
Creators: name: Ebadi, Hossein
name: Shahmorad, Sadagat
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The effects of both density stratification and magnetic field expansion on torsional Alfven waves in solar spicules are studied. Also, their eigenfrequencies, eigenfunctions, and the period ratio P_1/P_2 are obtained with a novel mathematical method. We showed that under some circumstances this ratio can approach its observational value even though it departs from its canonical value of $2$. Moreover, Eigenfunction height variations show that the oscillations amplitude are increasing towards higher heights which is in agreement with the observations. This means that with a little increase in height, amplitude of oscillations expands due to the significant decrease in the density.
description: Accepted for publication in Astrophysics and Space Science
Sonnenfleckenzeichnung Nr. 27584.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.07.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Quantitative analysis of soil water content in young drip-irrigated olive orchards
Creators: name: Masmoudi Charfi, C.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: The present work was carried out in northern Tunisia (36°40’ N, 10°16’ E) during a single growing season in order to examine how water is distributed within young drip-irrigated olive orchards on the basis of distance to trunk and depth. Soil water content was measured by using a time domain reflectometer (TDR) and a neutron probe calibrated by concurrently measuring soil water content gravimetrically. Measurements were made below the canopies, along the line of drippers and out of the projected canopy area, at distances of 1.4 m, 2.2 m, 2.8 m and 4.2 m from trunks (Compartments G1, G2, G3 and G4), taking into account the heterogeneous distribution of roots. Results showed significant and positive correlations between the series of data collected simultaneously with the PVC and aluminum access tubes and those collected using the different methods and apparatus, demonstrating that any device may be employed, depending only on their availability. Results showed significant changes in soil water contents and stocks according to the season, depth and distance to trunk. During the rainy period, the stocks of water increased homogeneously within all soil compartments, but varied consistently during the dry season with lower values recorded within the upper soil layers. The area situated at 4.2 m from trunks was the driest in summer but it was the wettest during the rainy period. No roots were found at this distance while maximum root densities were observed at 0.4 m from trunk within the upper layers. The lack of water recorded after June affected tree height and fruit growth rates, although irrigation application was sufficient to meet the seasonal crop water needs.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
title: Australian Sub-bottom Profiling Guidelines
Creators: name: N., Lennard
name: M., McNeil
name: D., Bergersen
name: E., Johnstone
name: P., Vandenbossche
name: C., Yule
Publisher: name: Commonwealth of Australia (Geoscience Australia)
Year: 2023
Subjects: subject: AusSeabed
subject: Guidelines
subject: Marine
subject: Seabed
subject: Acoustic
subject: Sub-bottom
subject: Earth Sciences
subject: Applied geophysics
subject: Published_External

description: The Australian Sub-bottom Profiling Guidelines were developed by the AusSeabed community to establish a standardised approach to the acquisition of sub-bottom profiler data in an Australian context. They complement a suite of ocean best practice guidelines developed by the AusSeabed community including the Australian Multibeam Guidelines (eCat Record 121571) and the Australian Satellite Derived Bathymetry Guidelines.The guidelines provide recommended procedures for data acquisition, quality checking and data submission to the AusSeabed marine data portal. They were initially designed for use by the Australian Hydrographic Office Hydroscheme Industry Partnership Program (HIPP) to enable the acquisition of standardised, efficient and effective sub-bottom profile data for general seabed characterisation and collection of baseline data. Additionally, the guidelines may be used by any agency or party collecting seabed geophysical data in Australia’s marine jurisdiction for a range of use cases.
The guidelines include a broad examination of data acquisition, basic processing for quality checking, metadata description, and guidance for data submission to AusSeabed. They do not include prescriptive equipment-specific hardware and software specifications, detailed user-defined settings or instrument preparation activities such as bench/workshop tests, personnel requirements, or provide survey costing information.
The sustainability of old grapevine mother plants in relation to new mandatory diagnostic tests for virus control
Creators: name: Rizzo, D.
name: Stefani, L.
name: Paoli, M.
name: Triolo, Enrico
name: Panattoni, A.
name: Luvisi, Andrea
Publisher: name: Advances in Horticultural Science
Year: 2012

description: In 2011, the methods to perform phytosanitary tests to check for viruses in grapevine nurseries were reassessed and new regulations were defined (DM 13 December 2011). The mandatory tests require serological assays for the diagnosis of five viruses in grapevine mother plants transplanted in Tuscany in 2001 or before. The aim of the present paper is to report the impact of certification programs applied before 2001 in Tuscany and the sustainability of older mother plants with relation to the new mandatory diagnostic tests. Among the cultivars, virus infection was reported in 19.2% of pool samples, whereas 2.4% of rootstock pool samples showed a compromised health status. GLRaV-3 is the most frequently found virus (10.4% and 1.3% of cultivar and rootstock pools, respectively), and it is also included in the most frequent multiple infections. Multiple infections represent about 25% of infected cultivar pools and almost 50% of infected rootstock pools.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
BaFe$_2$Se$_3$: a high $T_{\rm C}$ magnetic multiferroic with large ferrielectric polarization
Creators: name: Dong, Shuai
name: Liu, J. -M.
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The iron-selenides are important because of their superconducting properties. Here, an unexpected phenomenon is predicted to occur in an iron-selenide compound with a quasi-one-dimensional ladder geometry: BaFe$_2$Se$_3$ should be a magnetic ferrielectric system, driven by its magnetic block order via exchange striction. A robust performance (high $T_{\rm C}$ and large polarization) is expected. Different from most multiferroics, BaFe$_2$Se$_3$ is ferrielectric, with a polarization that mostly cancels between ladders. However, its strong magnetostriction still produces a net polarization that is large ($\sim$$0.1$ $μ$C/cm$^2$) as compared with most magnetic multiferroics. Its fully ferroelectric state, with energy only slightly higher than the ferrielectric, has a giant improper polarization $\sim$$2-3$ $μ$C/cm$^2$.
description: 5 pages, 3 figures
Effects of chicken manure and vermicompost teas on herb yield, secondary metabolites and antioxidant activity of lemon basil (Ocimum x citriodorum Vis.)
Creators: name: Javanmardi, J.
name: Ghorbani, E.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: Effects of chicken manure tea (CMT) and vermicompost tea (VCT) as soil drench on vegetative growth, herb yield, essential oil content, total phenolics, total flavonoids and antioxidant activity of lemon basil (Ocimum × citriodorum Vis.) was evaluated in a two-year field experiment. The greatest plant height and number of leaves and flowers, shoot fresh and dry weight and leaf chlorophyll content were obtained using CMT at either 1:5 or 1:10 dilutions with no significant differences. The highest number of lateral branches and flavonoid content were obtained when CMT at 1:5 dilution was applied. Essential oil content was at its highest level (0.618%) when CMT or VCT were used at 1:10 dilution, while the greatest total phenolic content and total antioxidant activity were obtained at 1:5 dilution of VCT. The results emphasize the possibility of using organic-based compost teas for enhancing herbal yield and important secondary metabolites in aromatic medicinal plants.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Unraveling biomarkers in Parkinson’s disease: the role of Insulin-like growth factor-1 (IGF-1) and DAT imaging
Creators: name: Picillo, Marina
Publisher: name: Universita degli studi di Salerno
Year: 2018
Subjects: subject: MED/26 NEUROLOGIA
subject: Parkinson
subject: Biomarker
subject: DAT

description: 2015 - 2016
description: Parkinson's disease (PD) is the second most common neurodegenerative disease after Alzheimer's disease, affecting up to 10 million individuals worldwide. Although symptomatic treatment ameliorates motor symptoms, currently there are no disease-modifying treatments. A biomarker is defined by the National Institutes of Health as “a characteristic that is objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes or pharmacological responses to a therapeutic intervention”. Thus, biomarkers include clinical data, measurements of biological samples (e.g., plasma, serum, cerebrospinal fluid) and application of brain imaging techniques to detect changes in brain structure and function. As for PD, biomarkers represent tools potentially suitable for either clinical or research settings and useful in predicting onset, confirming diagnosis, detecting progression and evaluating the response to disease-modifying treatments. In addition, biomarkers’ trends in different stages of disease may reflect the widespread neurochemical and neuroanatomical changes that occur throughout the course of PD and, thus, possibly suggest new insights in the pathophysiological mechanisms underlying disease progression. The range of available biomarkers in PD is fast expanding and includes an increasing number of laboratory, clinical and imaging data. ... [edited by Author]
Influence of bagging on fruit quality and mineral composition of Himsagar mango grown in new alluvial zones of West Bengal
Creators: name: Dutta, P.
name: Majumder, D.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: The effect of polybagging of mango (Mangifera indica L.) fruits was evaluated at different stages of fruit development (35, 45, 55 and 65 days after fruit set). Fruits were harvested at different stages of maturity (75, 85 and 90 days after fruit set) and allowed to ripen at room temperature (34-36°C, RH 85-90%). The use of bagging at different stages of fruit development improved the appearance of fruit, fruit weight and size through other effects such as increased relative humidity and a consequently reduced fruit water loss. The maturity of fruits, at all stages of fruit harvest, was delayed with increasing bagging duration. Early bagging of fruit (35 days after fruit set) delayed the development of ripening characteristics in comparison to delayed bagging and unbagged control fruit, which ripened earliest. This was clearly evident from the carotene content in the mango flesh, at the different stages of harvest and of ripening fruit, which was the result of higher temperature inside the bags. In bagged fruits usually day/night temperature fluctuations were reduced and there was a cut off in the temperature curve inside the bag. The total soluble solids and sugar content were higher and titratable acid content was always less in unbagged fruit at all stages of fruit harvest and fruit ripening. Mineral elements were also affected by the number of days of bagging. The reduced Ca concentration in long-duration bagging (early bagging) might be due to increased RH around the fruits. Fruits bagged for 55 days recorded an increased content of N, P, Zn, Mn and Fe while fruit calcium concentration was reduced by bagging for 55 days. Anthracnose and stem-end-rot (SER) caused by Colletotrichum and Diplodia spp. Respectively were reduced by bagging in both years through a reduction in contact between disease propagules and fruits. These results indicate that bagging can improve fruit quality by reducing disease, lead to a better appearance of fruit and increase fruit weight and size.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Sonnenfleckenzeichnung Nr. 27653.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 25.11.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Sonnenfleckenzeichnung Nr. 27500.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.03.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Oleiculture in progress
Creators: name: Marone, Elettra
name: Fiorino, Piero
Publisher: name: Advances in Horticultural Science
Year: 2012

description: The present work evaluates the limits and possibilities of development with regard to the most recent olive-growing techniques in light of up-to-date knowledge of species characteristics. After a brief introduction regarding the productive capacity of olive, the new taxonomic position of the cultivated species and a reorganization of the genus Olea is presented in the first part of the work. Examination follows of the assumed stages of domestication, spread (from the Bronze Age until decline in the 6-10th centuries A.D.) and then globalization of the species from the 19th century until the present. The second part addresses the spread of olive to the different continents, environmental limitations to its cultivation and the growth model that distinguishes it from most of the other cultivated woody species. The various problems that arise when olive is cultivated outside its areal of origin are considered, from induction processes to effective chilling requirements, as well as the effects of climatic environment on plant growth and product quality following shifts in areal. The paper concludes with a brief analysis of open questions relative to new models of cultivation.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Universal and non-universal effective $N$-body interactions for ultracold harmonically-trapped few-atom systems
Creators: name: Yin, X. Y.
name: Blume, D.
name: Johnson, P. R.
name: Tiesinga, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We derive the ground-state energy for a small number of ultracold atoms in an isotropic harmonic trap using effective quantum field theory (EFT). Atoms are assumed to interact through pairwise energy-independent and energy-dependent delta-function potentials with strengths proportional to the scattering length $a$ and effective range volume $V$, respectively. The calculations are performed systematically up to order $l^{-4}$, where $l$ denotes the harmonic oscillator length. The effective three-body interaction contains a logarithmic divergence in the cutoff energy, giving rise to a non-universal three-body interaction in the EFT. Our EFT results are confirmed by nonperturbative numerical calculations for a Hamiltonian with finite-range two-body Gaussian interactions. For this model Hamiltonian, we explicitly calculate the non-universal effective three-body contribution to the energy.
description: 7 pages, 4 figures
Scattering line polarization in rotating, optically thick disks
Creators: name: Milic, Ivan
name: Faurobert, Marianne
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: To interpret observations of astrophysical disks it is essential to understand the formation process of the emitted light. If the disk is optically thick, scattering dominated and permeated by a Keplerian velocity field, Non-Local Thermodynamic Equilibrium radiative transfer modeling must be done to compute the emergent spectrum from a given disk model. We investigate Non-local thermodynamic equilibrium polarized line formation in different simple disk models and aim to demonstrate the importance of both radiative transfer effects and scattering as well as the effects of velocity fields. We self-consistently solve the coupled equations of radiative transfer and statistical equilibrium for a two level atom model by means of Jacobi iteration. We compute scattering polarization, that is Q/I and U/I line profiles. The degree of scattering polarization is significantly influenced by the inclination of the disk with respect to observer, but also by the optical thickness of the disk and the presence of rotation. Stokes U shows double-lobed profiles with amplitude which increases with the disk rotation. Our results suggest that the line profiles, especially the polarized ones, emerging from gaseous disks differ significantly from the profiles predicted by simple approximations. The profiles are diverse in shape, but typically symmetric in Stokes Q and antisymmetric in Stokes U. A clear indicator of disk rotation is the presence of Stokes U, which might prove to be a useful diagnostic tool. We also demonstrate that, for moderate rotational velocities, an approximate treatment can be used, where non-local thermodynamic equilibrium radiative transfer is done in the velocity field-free approximation and Doppler shift is applied in the process of spatial integration over the whole emitting surface.
description: 16 pages; 12 figures; Accepted with revision for A&A. This is the version after first round of referee's suggestions
Mechanical harvesting of oil olives by trunk shaker with a reversed umbrella interceptor
Creators: name: Di Vaio, Claudio
name: Marallo, N.
name: Nocerino, S.
name: Famiani, F.
Publisher: name: Advances in Horticultural Science
Year: 2012

description: Trunk shakers are primarily used for the mechanical harvesting of oil olives in intensive orchards. The objective of this trial was to determine the efficiency of mechanical harvesting of olives with a self-propelled trunk shaker with a reversed umbrella interceptor (model F3, SICMA, Catanzaro, Italy), from adult trees of two autochthonous cultivars, ‘Ortice’ and ‘Ortolana’, growing in southern Italy with 6 × 6 m spacing and trained to the vase system. The main characteristics of the trunk shaker were: an engine power of 77 Kw (105 CV), a very-high-frequency vibrating head (1800-2000 vibrations/min), a self-braking system and a 6-meter diameter umbrella opening. The worksite consisted of two workers, one for maneuvering the harvesting machine, and the other for handling the olives. Mechanical harvesting was carried on 30 November 2006 when the fruits of ‘Ortice’ and ‘Ortolana’ had a weight and detachment force around 2.8 g and 3.1 N and 3.8 g and 4.6 N, respectively, and the fruit drop was around 14% and 10%, respectively. Both cultivars had a good production (26.06 and 21.18 kg/tree). The mechanical harvesting yield (percentage of mechanically harvested olives) was very high, reaching values around 97% in both cultivars. Moreover, the low number of workers, the reduced time for the operation (2.5 min/tree), the good yield/tree and the high quantity of harvested fruit allowed a very high work productivity to be obtained: around 302 kg/h/worker for ‘Ortice’ and 246 kg/h/worker for ‘Ortolana’. The quality of the oils extracted from the harvested olives met the requirements set by European law for extra virgin olive oils. The results indicate that the use of a trunk shaker with a reversed umbrella can be an efficient solution for mechanical harvesting of the ‘Ortice’ and ‘Ortolana’ cultivars in southern Italy.
description: Advances in Horticultural Science, Vol 26 No 3-4 (2012)
Sonnenfleckenzeichnung Nr. 27625.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.10.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Sonnenfleckenzeichnung Nr. 27541.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.06.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Sonnenfleckenzeichnung Nr. 27495.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 21.03.1987, erstellt von Hans Ulrich Keller
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken