cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Protecting the future of academic discovery: a pro-active approach to early career faculty development of biomedical researchers
Creators: name: Kesecker, Kacy
Publisher: name: Oregon Health and Science University
Year: 2023
Subjects: subject: Mentoring
subject: Pandemics
subject: Leadership
subject: Academic Success
subject: Job Satisfaction
subject: Faculty
subject: Workplace
subject: Educational research findings
subject: Research/lab mentoring
subject: Skill building

description: Proactive mentorship and professional development are fundamental to the success of early career faculty. The Early Career Advancement Program (ECAP) within the OHSU School of Medicine (SOM) is designed to facilitate and optimize faculty productivity, promotion, and career satisfaction. The purpose of this project is to increase visibility for the Early Career Advancement Program and the opportunities it provides, demonstrate the value and effectiveness of the Early Career Advancement Program, and to illustrate outcomes of the ECAP Program.
ARABIC LITERARY LANGUAGE AND DIALECTS
Creators: name: Vokhidov Takhir Makhamatmurodovich Arabic language teacher Tashkent University of Social Innovation
Publisher: name: Zenodo
Year: 2024

description: This article explores the distinction between Classical Arabic (Fusha) and the various Arabic dialects, challenging the misconception that ancient Arab tribes spoke in the same standardized form of Arabic used in modern media and official contexts. The article emphasizes that the diversity of Arabic dialects is deeply rooted in the geographical and ethnic dispersion of tribes across the Arabian Peninsula and the influence of historical and colonial factors.

Key terms: Historical Dialect Diversity, Colonialism, the spread of Islam and the influence of Western colonialism, linguistic variations, modern dialects, Dialect, Fusha Debate.
Οι παθογένειες του ελληνικού κράτους αποτελούν τροχοπέδη στην ποιότητα των παρεχόμενων υπηρεσιών του. Οι μέχρι τώρα μεταρρυθμίσεις στη δημόσια διοίκηση και η εργασιακή αφοσίωση δημοσίων λειτουργών και υπαλλήλων καθώς και η αξιολόγησή τους δεν καρποφόρησαν. Τρόποι και δράσεις προς ένα πιο ευέλικτο, άμεμπτο και αποτελεσματικό δημόσιο τομέα.
Creators: name: Γιαννακάκη, Γεωργία
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2022
Subjects: subject: παθογένειες του ελληνικού κράτους - μεταρρυθμίσεις στη δημόσια διοίκηση - αξιολόγηση δημοσίων υπαλλήλων - αποτελεσματικό δημόσιο τομέα

description: Μ.Δ.Ε. 365
description: O σκοπός της παρούσας διπλωματικής εργασίας είναι η κριτική ανάλυση βασικών προβλημάτων της ελληνικής δημόσιας διοίκησης, μέσα από ένα πλαίσιο που εμπεριέχει αναφορές στη δημόσια διοίκηση σε ευρωπαϊκό επίπεδο και η διενέργεια έρευνας με την χρησιμοποίηση ενός αρκετά εύστοχου, πλούσιου και δομημένου ερωτηματολογίου, ο στόχος της οποίας ήταν να αναζητηθούν απόψεις και βιώματα των ατόμων που συμμετείχαν σε αυτή, μέσα από την επαφή τους με την ελληνική δημόσια διοίκηση. Σε γενικές γραμμές, τα αποτελέσματα που προέκυψαν από την διεξαγωγή της έρευνας, έδειξαν ότι τα προβλήματα της ελληνικής δημόσιας διοίκησης εξακολουθούν να υπάρχουν και παρά τις προσπάθειες των τελευταίων ετών, επιμένουν να ταλανίζουν και να ταλαιπωρούν τους Έλληνες πολίτες. Έτσι, η διαρκής προσπάθεια μεταρρύθμισης της δημόσιας διοίκησης, με γνώμονα την εξάλειψη της διαφθοράς και την αύξηση της αποτελεσματικότητας, από κοινού με το ώριμο και αναγκαίο αίτημα ως προς μια περισσότερο ουσιαστική και ποιοτική αξιολόγηση, τόσο των δημοσίων υπαλλήλων και λειτουργών όσο και των προσφερόμενων δημοσίων υπηρεσιών, διαγράφονται ως τα σημαντικότερα ζητήματα της παρούσας διπλωματικής εργασίας.
title: Μελέτη και σχεδίαση μη επανδρωμένου οχήματος για αντιμετώπιση φυσικών καταστροφών
title: Study and design of an unmanned vehicle to respond to natural disasters
titleType: AlternativeTitle
Creators: name: Φιλάνδρας, Θεοχάρης
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Unmanned ground vehicle
Raspberry Pi Pico
Earthquake
Disasters
UGV

description: Η παρούσα διπλωματική εργασία ασχολείται με τη μελέτη και τη σχεδίαση μη επανδρωμένου οχήματος για την αντιμετώπιση φυσικών καταστροφών. Το όχημα που κατασκευάστηκε ανήκει στην κατηγορία της έρευνας και διάσωσης (Search and Rescue- SaR) και έχει τη μορφή ενός rocker-bogie. Τα οχήματα αυτά αποτελούνται από έξι τροχούς πάνω στους οποίους βρίσκονται 6 κινητήρες, οι άξονες των οποίων έχουν ανεξάρτητη κίνηση για ευκολία κίνησης αφ’ ενός σε ανώμαλο έδαφος και αφ’ εταίρου για την αναρρίχησή του.
Probing turbulence intermittency via Auto-Regressive Moving-Average models
Creators: name: Faranda, Davide
name: Pons, Flavio Maria Emanuele
name: Dubrulle, Berengere
name: Daviaud, Francois
Publisher: name: arXiv
Year: 2014
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We suggest a new approach to probing intermittency corrections to the Kolmogorov law in turbulent flows based on the Auto-Regressive Moving-Average modeling of turbulent time series. We introduce a new index $Υ$ that measures the distance from a Kolmogorov-Obukhov model in the Auto-Regressive Moving-Average models space. Applying our analysis to Particle Image Velocimetry and Laser Doppler Velocimetry measurements in a von Kármán swirling flow, we show that $Υ$ is proportional to the traditional intermittency correction computed from the structure function. Therefore it provides the same information, using much shorter time series. We conclude that $Υ$ is a suitable index to reconstruct the spatial intermittency of the dissipation in both numerical and experimental turbulent fields.
description: 5 pages
Eleocharis sphacelata: internal gas transport pathways and modelling of aeration by pressurized flow and diffusion
Creators: name: Sorrell, Brian K
name: Brix, Hans
name: Orr, Philip T
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

The ability of diffusive gas transport and pressurized, convective flow to satisfy internal oxygen demands was examined for an aquatic sedge, Eleocharis sphacelata R. Br. Resistances to convection and diffusion through the plant were quantified from anatomical studies of the airspace dimensions, and these were used in mathematical models to calculate the fluxes required to satisfy oxygen demands measured in the tissue. The greatest resistance to diffusion in the underwater tissue was the submerged culm between the waterline and sediment surface (1560 Ms m−3 per m culm length). Resistances of the nodal intercalary meristem (52 Ms m−3) and rhizome internode (34 Ms m−3) were minor. In contrast, resistances to convection were low in the culms (38 MPa s m−3 per m culm length), and higher in the nodal meristems (93 MPa s m−3). The rhizome internodes had large cortical canals with a low convective resistance (0.75 MPa s m−3), and a parallel spongy pith with a very high resistance (518 MPa s m−3) that is probably short-circuited by convection. The resistance of the submerged culm means that diffusion is inadequate to satisfy oxygen demands in plants growing in >10 cm of water, and that convection is therefore essential in the natural habitat of this species (water to c. 2 m depth). However, a convective oxygen influx as low as 28 × 10−8 mol s−1 per culm (equivalent to a gas flow rate of 3 μl s−1 per culm) could satisfy the entire oxygen demand of the underwater tissue; this value is well below actual rates. At this flow rate, the spongy pith in the rhizome would also remain aerobic: it has a low resistance to diffusion (73 Ms m−3) and could receive sufficient oxygen by diffusion from the node. The data agree well with previous empirical measurements of convection in this species and show that diffusion and convection are both important processes for its aeration.
Genomewide pharmacogenomic study of metabolic side effects to antipsychotic drugs
Creators: name: McClay, J L
name: Lieberman, J A
name: Adkins, D E
name: van den Oord, E J C G
name: Zhao, Z
name: Jia, P
name: Sullivan, P F
name: McEvoy, J P
name: Stroup, T S
name: Bukszár, J
name: Åberg, K
name: Perkins, D
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Understanding individual differences in the susceptibility to metabolic side effects as a response to antipsychotic therapy is essential to optimize the treatment of schizophrenia. Here we perform genomewide association studies (GWAS) to search for genetic variation affecting the susceptibility to metabolic side effects. The analysis sample consisted of 738 schizophrenia patients, successfully genotyped for 492K SNPs, from the genomic subsample of the Clinical Antipsychotic Trial of Intervention Effectiveness (CATIE) study. Outcomes included twelve indicators of metabolic side effects, quantifying antipsychotic-induced change in weight, blood lipids, glucose and hemoglobin A1c, blood pressure and heart rate. Our criterion for genomewide significance was a pre-specified threshold that ensures, on average, only 10% of the significant findings are false discoveries. Twenty-one SNPs satisfied this criterion. The top finding indicated a SNP in MEIS2 mediated the effects of risperidone on hip circumference (q =.004). The same SNP was also found to mediate risperidone's effect on waist circumference (q =.055). Genomewide significant finding were also found for SNPs in PRKAR2B, GPR98, FHOD3, RNF144A, ASTN2, SOX5 and ATF7IP2, as well as several intergenic markers. PRKAR2B and MEIS2 both have previous research indicating metabolic involvement and PRKAR2B has previously been shown to mediate antipsychotic response. Although our findings require replication and functional validation, this study demonstrates the potential of GWAS to discover genes and pathways that potentially mediate adverse effects of antipsychotic medication.
Experimental manipulations of the biomass of introduced carp (Cyprinus carpio) in billabongs. I. Impacts on water-column properties
Creators: name: King, A. J
name: Robertson, A. I
name: Healey, M. R
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

Two billabongs on the floodplain of the Murrumbidgee River, Australia, were partitioned in half with impermeable plastic barriers for four months from summer to winter 1995. The densities of carp were manipulated to establish high- and low-carp biomass treatments in each billabong. Final standing stocks of carp in the high- and low-carp treatments of each billabong were 1181 and 101 kg ha-1 , and 669 and 348 kg ha-1 , respectively. Turbidity, phytoplankton biomass and total and dissolved phosphorus concentrations were similar in both ends of each billabong before the establishment of the plastic barriers. Throughout the experimental period, turbidity and phytoplankton biomass were significantly higher in the high-carp treatment in both billabongs. However, the two billabongs had different temporal patterns for both turbidity and phytoplankton biomass. Concentrations of total phosphorus were usually greater in the high-carp end of each billabong but there was no consistent pattern for dissolved phosphorus. Carp had a significant impact on turbidity and intensity of algal bloom but this varied with carp biomass and billabong sediment type, and factors other than carp usually contributed to most of the variation in measured water quality.
title: Έρευνα και επισκόπηση αλγορίθμων μηχανικής μάθησης για πολλαπλή κατηγοριοποίηση με χρήση του εργαλείου Weka και εφαρμογή στην εκπαίδευση
title: Research and overview of machine learning algorithms for multiple classification using the Weka tool and application in education
titleType: AlternativeTitle
Creators: name: Μήτρου, Γεώργιος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Μηχανική μάθηση
Κατηγοριοποίηση
Ταξινόμηση
Πρόβλεψη
Απόδοση μαθητών
Weka

description: Η παρούσα διπλωματική εργασία προσεγγίζει ένα θέμα που απασχολεί την ερευνητική κοινότητα, την εφαρμογή αλγορίθμων μηχανικής μάθησης στην εκπαίδευση. Γίνεται εφαρμογή τεχνικών και μεθόδων από το πεδίο της μηχανικής μάθησης με στόχο την πρόβλεψη της απόδοσης των μαθητών, στόχος που επιπλέον παρουσιάζει ενδιαφέρον για την εκπαιδευτική και τη μαθητική κοινότητα. Αρχικά, γίνεται μια καταγραφή του επιστημονικού πεδίου της μηχανικής μάθησης παρουσιάζοντας και τα τρία είδη μηχανικής μάθησης, τη μάθηση με επίβλεψη, τη μάθηση χωρίς επίβλεψη και τη μάθηση με ενίσχυση. Πραγματοποιήθηκε εκτενέστερη αναφορά στη μάθηση με επίβλεψη και ειδικότερα στους σημαντικότερους αλγορίθμους κατηγοριοποίησης – ταξινόμησης (classification) που παρουσιάστηκαν αναλυτικά. Καταγράφονται προηγούμενες έρευνες που δείχνουν ότι η χρήση αλγορίθμων κατηγοριοποίησης υλοποιείται για την πρόβλεψη της απόδοσης των μαθητών, αλλά και για άλλους μαθησιακούς στόχους με ποικίλα ποσοστά επιτυχίας. Στη συνέχεια γίνεται παρουσίαση του λογισμικού εξόρυξης γνώσης Weka, που αποτελεί ένα δημοφιλές εργαλείο έρευνας και εφαρμογής αλγορίθμων μηχανικής μάθησης. Οι αλγόριθμοι του Weka εκπαιδεύτηκαν σε ένα σύνολο εκπαιδευτικών δεδομένων που αντλήθηκε από το Διαδίκτυο. Τα δεδομένα χωρίστηκαν σε 2 και σε 5 κλάσεις και εκτελέστηκαν οι αλγόριθμοι κατηγοριοποίησης. Σύμφωνα με τα αποτελέσματα των πειραμάτων οι μέθοδοι κατηγοριοποίησης μπορούν να εφαρμοστούν επιτυχώς, καθώς η απόδοση τους κυμάνθηκε από 80% έως 95% περίπου.
$f(Q,T)$ gravity, its covariant formulation, energy conservation and phase-space analysis
Creators: name: Loo, Tee-How
name: Solanki, Raja
name: De, Avik
name: Sahoo, P. K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present article we analyze the matter-geometry coupled $f(Q,T)$ theory of gravity. We offer the fully covariant formulation of the theory, with which we construct the correct energy balance equation and employ it to conduct a dynamical system analysis in a spatially flat Friedmann-Lemaître-Robertson-Walker spacetime. We consider three different functional forms of the $f(Q,T)$ function, specifically, $f(Q,T)=αQ+ βT$, $f(Q,T)=αQ+ βT^2$, and $f(Q,T)=Q+ αQ^2+ βT$ . We attempt to investigate the physical capabilities of these models to describe various cosmological epochs. We calculate Friedmann-like equations in each case and introduce some phase space variables to simplify the equations in more concise forms. We observe that the linear model $f(Q,T)=αQ+ βT$ with $β=0$ is completely equivalent to the GR case without cosmological constant $Λ$. Further, we find that the model $f(Q,T)=αQ+ βT^2$ with $β\neq 0$ successfully depicts the observed transition from decelerated phase to an accelerated phase of the universe. Lastly, we find that the model $f(Q,T)= Q+ αQ^2+ βT$ with $α\neq 0$ represents an accelerated de-Sitter epoch for the constraints $β< -1$ or $ β\geq 0$.
description: EPJC accepted version
Zhenya Zhekova – Stela Doncheva, Production of Imitative Byzantine Folles in the First Bulgarian Kingdom.
Creators: name: Curto Pelle, Ilia
Publisher: name: The Byzantine Review
Year: 2024
Subjects: Byzantine numismatics
Bulgaria
Byzantine imitative coins

description: Zhenya Zhekova – Stela Doncheva, Production of Imitative Byzantine Folles in the First Bulgarian Kingdom. Veliko Tarnovo: Faber 2022. 316 pp., color illustrations. – ISBN 978-619-00-1586-4
description: The Byzantine Review, Bd. 6 (2024)
Master's thesis recital (composition)
Creators: name: Matthews, Rachel Elizabeth
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Woodwind trios (Saxophones (3))
Piano music
Sextets (Piano, clarinet, flute, violin, percussion, cello)

description: Surrounded by dreamers (Sarah Hetrick, soprano saxophone ; Bryant Anderson, alto saxophone ; Ally Morales, baritone saxophone) -- Vignettes (Dr. Patricia Dinkins-Matthews, piano) -- The heart of grief (Zach Warren, flute ; Daniel Toscano Rodriguez, clarinet ; John Dawson, percussion ; Q langman, piano ; Jillan Gunawan, violin ; Akshaya Avril Tucker, cello ; Yoona Jeong, conductor)
Experimental manipulations of the biomass of introduced carp (Cyprinus carpio) in billabongs. II. Impacts on benthic properties and processes
Creators: name: Robertson, A. I
name: Healey, M. R
name: King, A. J
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

Two billabongs on the floodplain of the Murrumbidgee River, Australia, were partitioned in half with impermeable plastic barriers and the biomass of carp was manipulated to establish high- and low-carp biomass treatments in each billabong. Measurements of benthic variables (rates of particle settlement, biofilm development, sediment respiration, macrophyte detritus decomposition, sediment solid-phase nutrient concentrations and benthic algal biomass) were performed over four months from summer to winter 1995. Rates of particle settlement were greater in the high-carp treatment of each billabong throughout the experiment. High carp biomass had a negative impact on the autotrophic component of the biofilm developing on wood blocks placed at different heights above the sediment surface but the mechanism responsible differed between billabongs. Sediment oxygen demand became greater in the presence of a higher biomass of carp during the experiment but time courses differed between billabongs. Manipulations of carp biomass did not influence algal biomass on the sediment surface, the rate of decomposition of macrophyte detritus or sediment solid-phase nutrients or nutrient ratios. The impact of carp on benthic and surficial processes was significant but the mechanisms of change differed between billabongs.
GWA study data mining and independent replication identify cardiomyopathy-associated 5 (CMYA5) as a risk gene for schizophrenia
Creators: name: Blackman, J
name: Lee, G
name: Shi, J
name: Craddock, N J
name: van den Oord, E
name: Zhao, Z
name: Owen, M J
name: Schwab, S
name: Levinson, D F
name: Walsh, D
name: Sullivan, P F
name: Duan, J
name: O'Donovan, M C
name: O'Neill, F A
name: Lencz, T
name: Gejman, P V
name: Chen, X
name: Nimgaonkar, V
name: Chowdari, K
name: Darvasi, A
name: Bronstein, M
name: Kirov, G K
name: Sanders, A
name: Lewis, D
name: Weinberger, D R
name: Guo, A
name: Chen, J
name: Maher, B S
name: Qin, W
name: Wildenauer, D
name: Fanous, A H
name: Straub, R E
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: We conducted data-mining analyses using the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) and molecular genetics of schizophrenia genome-wide association study supported by the genetic association information network (MGS-GAIN) schizophrenia data sets and performed bioinformatic prioritization for all the markers with P-values ≤0.05 in both data sets. In this process, we found that in the CMYA5 gene, there were two non-synonymous markers, rs3828611 and rs10043986, showing nominal significance in both the CATIE and MGS-GAIN samples. In a combined analysis of both the CATIE and MGS-GAIN samples, rs4704591 was identified as the most significant marker in the gene. Linkage disequilibrium analyses indicated that these markers were in low LD (3 828 611–rs10043986, r2 = 0.008; rs10043986–rs4704591, r2 = 0.204). In addition, CMYA5 was reported to be physically interacting with the DTNBP1 gene, a promising candidate for schizophrenia, suggesting that CMYA5 may be involved in the same biological pathway and process. On the basis of this information, we performed replication studies for these three single-nucleotide polymorphisms. The rs3828611 was found to have conflicting results in our Irish samples and was dropped out without further investigation. The other two markers were verified in 23 other independent data sets. In a meta-analysis of all 23 replication samples (family samples, 912 families with 4160 subjects; case–control samples, 11 380 cases and 15 021 controls), we found that both markers are significantly associated with schizophrenia (rs10043986, odds ratio (OR) = 1.11, 95% confidence interval (CI) = 1.04–1.18, P = 8.2 × 10−4 and rs4704591, OR = 1.07, 95% CI = 1.03–1.11, P = 3.0 × 10−4). The results were also significant for the 22 Caucasian replication samples (rs10043986, OR = 1.11, 95% CI = 1.03–1.17, P = 0.0026 and rs4704591, OR = 1.07, 95% CI = 1.02–1.11, P = 0.0015). Furthermore, haplotype conditioned analyses indicated that the association signals observed at these two markers are independent. On the basis of these results, we concluded that CMYA5 is associated with schizophrenia and further investigation of the gene is warranted.
title: Albert Einstein, Alfred North Whitehead
title: Eine kurze Geschichte der Physik
titleType: Subtitle
Creators: name: Kohl, Christian Thomas
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: Einstein
subject: Whitehead
subject: Geschichte
subject: Physik
subject: Philosophie
subject: 100 Philosophie und Psychologie::100 Philosophie::101 Theorie der Philosophie

description: Abstract Die moderne Physik besteht nicht nur aus neuen Entdeckungen und Erfindungen durch die Relativitätstheorie und durch die Quantenphysik. Sie besteht auch aus völlig neuen Sichtweisen und flexiblen Denkweisen von Zusammenhängen und Verschränkungen zwischen den Dingen. Die moderne Physik hat sich von dem Klischee des Schwarz-Weiß-Denkens verabschiedet, für das es nur getrennte Dinge, ohne fließende Übergänge gibt. Solche unbeweglichen, dogmatischen schwarzweißen Denkweisen können wir zurückverfolgen bis zu dem griechischen Philosophen Aristoteles. In der Zeit der Klassischen Mechanik hatten sie einen überwältigenden Erfolg. Galilei behauptete, das Buch der Natur sei in der Sprache der Mathematik geschrieben. Das war die sehr kurzgefasste Formulierung der Klassischen Mechanik. Die moderne Physik hat sich keineswegs von der Mathematik verabschiedet, ganz und gar nicht. Doch der heilige Ernst und der starre und absolute Dogmatismus hat nachgelassen. Moderne Denkweisen in der Physik können mit den Begriffen von fließenden Übergängen, von Zwischenstufen, von Zusammenhängen zwischen den Dingen und von Schwingungen gekennzeichnet werden. Seit Faraday und Maxwell hat sich eine Verschiebung der Untersuchungsobjekte ergeben: Seit der Mitte des 19. Jahrhunderts, seit ca 1850, drehen sich die Denkmodelle der modernen Physik nicht mehr um getrennte, isolierten Körper, die im Nichts schwimmen, sondern um die Zwischenräume zwischen den Körpern und um die flexiblen Beziehungsgeflechte zwischen den Dingen und um die Netzwerke, die die Dinge umgeben. Das sind ganz neue physikalische Denkweisen, die durchaus Dunkelzonen und Zweifel und Ungewissheiten kennen, die den Bereich der Exaktheit überschatten. Neue Beiträge der physikalischen Denkweisen sind auch durch eine Flexibilität bei der Bildung von Begriffen gekennzeichnet. Sie lassen sich nicht auf einige wenige Begriffe oder auf eine starre und exakte Festlegung der Wortwahl festnageln. „Jede Philosophie bezieht ihre Farbe von der geheimen Lichtquelle eines Vorstellungshintergrunds, der niemals ausdrücklich in ihren Gedankenketten auftaucht“ (Whitehead) (1)
Pure connection formalism for gravity: Recursion relations
Creators: name: Delfino, Gianluca
name: Krasnov, Kirill
name: Scarinci, Carlos
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In the gauge-theoretic formulation of gravity the cubic vertex becomes simple enough for some graviton scattering amplitudes to be computed using Berends-Giele-type recursion relations. We present such a computation for the current with all same helicity on-shell gravitons. Once the recursion relation is set up and low graviton number cases are worked out, a natural guess for the solution in terms of a sum over trees presents itself readily. The solution can also be described either in terms of the half-soft function familiar from the 1998 paper by Bern, Dixon, Perelstein and Rozowsky or as a matrix determinant similar to one used by Hodges for MHV graviton amplitudes. This solution also immediate suggests the correct guess for the MHV graviton amplitude formula, as is contained in the already mentioned 1998 paper. We also obtain the recursion relation for the off-shell current with all but one same helicity gravitons.
description: 13 pages, no figures
Unraveling Baroclinicity in Black Hole Weather Storms
Creators: name: Wittor, Denis
name: Gaspari, Massimo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the intracluster, intragroup, and circumgalactic medium (ICM, IGrM, CGM), turbulence plays a vital role in the self-regulated feedback and feeding cycle of central supermassive black holes (SMBHs). Here we continue our systematic dissection of the turbulent "weather" in high-resolution hydrodynamical simulations of feedback driven by active galactic nuclei (AGN). In non-barotropic and stratified atmospheres, baroclinicity is expected to generate fresh turbulence via misaligned gradients of density and pressure - such as in cyclonic storms on Earth. In this work, we dissect for the first time baroclinicity and its components in the astrophysical halo weather. Over the macro-scale galaxy cluster, baroclinicity tends to be dynamically subdominant for the enstrophy amplification. However, at and below the meso scale near the SMBH (r<10 kpc; t<20 Myr), baroclinicity is important to seed the initial enstrophy during active periods of AGN jet feedback. We find that baroclinicity shows stronger correlation with the density rather than pressure gradients. Despite the density-pressure gradient misalignment being often below 45°, their amplitudes boosted by mechanical AGN feedback are sufficient to enable key enstrophy/turbulence generation. Our study provides a novel step forward in understanding astrophysical atmospheres toward a unified BlackHoleWeather framework, akin to the complexity of Earth's weather.
description: 6 pages, 6 figures, accepted for publication in MNRAS Letters
The psychiatric disease risk factors DISC1 and TNIK interact to regulate synapse composition and function
Creators: name: Crozier, R A
name: Hayashi-Takagi, A
name: Dunlop, A J
name: Revilla-Sanchez, R
name: Charych, E I
name: Pausch, M
name: Weinberg, R J
name: Kelly, M P
name: Houslay, M D
name: Bates, B
name: Brandon, N J
name: Ishizuka, K
name: Yan, Z
name: Pulito, V L
name: Kariya, K
name: Murdoch, H
name: Xie, Y
name: Moss, S J
name: Seshadri, S
name: Lee, J B
name: Graziane, N M
name: Sawa, A
name: Wang, Q
name: Taylor, N
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2011

description: Disrupted in schizophrenia 1 (DISC1), a genetic risk factor for multiple serious psychiatric diseases including schizophrenia, bipolar disorder and autism, is a key regulator of multiple neuronal functions linked to both normal development and disease processes. As these diseases are thought to share a common deficit in synaptic function and architecture, we have analyzed the role of DISC1 using an approach that focuses on understanding the protein– protein interactions of DISC1 specifically at synapses. We identify the Traf2 and Nck-interacting kinase (TNIK), an emerging risk factor itself for disease, as a key synaptic partner for DISC1, and provide evidence that the DISC1–TNIK interaction regulates synaptic composition and activity by stabilizing the levels of key postsynaptic density proteins. Understanding the novel DISC1–TNIK interaction is likely to provide insights into the etiology and underlying synaptic deficits found in major psychiatric diseases.
Charalambos Dendrinos (ed.), Manuelis II Imperatoris Opera Theologica.
Creators: name: Leonte, Florin
Publisher: name: The Byzantine Review
Year: 2024
Subjects: Manuel II Palaiologos
Byzantine theology

description: Charalambos Dendrinos (ed.), Manuelis II Imperatoris Opera Theologica. De processione Spiritus Sancti, De ordine in Trinitate, Epistula ad Alexium Iagoupem (Corpus Christianorum Series Graeca 71). Turnhout: Brepols 2022. cliv+435 pp. – ISBN 978-2-503-52807-6
description: The Byzantine Review, Bd. 6 (2024)
Equation of State Phase Equilibria Calculations
Creators: name: Perschke, Douglas Roger
Publisher: name: The University of Texas at Austin
Year: 1984
Subjects: Phase equilibria
Miscible flooding
Flash calculations

description: Mixtures of carbon dioxide and some hydrocarbons will form liquid-liquid-vapor equilibrium at temperatures and pressures considered reservoir conditions. So that carbon dioxide miscible flooding may be properly simulated, accurate modeling of the phase behavior is necessary. An algorithm has been developed which is capable of predicting the two-phase and liquid-liquid-vapor equilibrium shown by C02-hydrocarbon mixtures. The algorithm conducts phase stability analysis calculations in series with flash calculations using the Peng-Robinson equation of state to model fluid behavior of all phases present. Example calculations were made of CO2 mixtures with normal alkanes which show liquid-vapor, liquid-liquid, and also liquid-liquid-vapor behavior. An example calculation was also made for a mixture of CO2 with a reservoir oil.
Fotini Kondyli, Rural Communities in Late Byzantium: Resilience and Vulnerability in the Northern Aegean.
Creators: name: Murdzhev, Pavel
Publisher: name: The Byzantine Review
Year: 2024
Subjects: landscape archaeology
social history
Byzantine settlements

description: Fotini Kondyli, Rural Communities in Late Byzantium: Resilience and Vulnerability in the Northern Aegean. Cambridge: Cambridge University Press 2022. 302 pp. – ISBN  978-1-10-884549-6
description: The Byzantine Review, Bd. 6 (2024)
Wirtschaft
Creators: name: Hering, Linda
name: Kalff, Yannick
name: Lenz, Sarah
Publisher: name: Soziologie und Nachhaltigkeit
Year: 2024
Subjects: Wirtschaftssoziologie
Nachhaltigkeit
individuelle Verantwortung
Globalisierung

description: Zum Blog-Beitrag
description: Soziologie und Nachhaltigkeit, 2024: SuN Blog Beiträge 2024
Flood-mediated changes in aquatic macrophyte community structure
Creators: name: Nielsen, D. L
name: Chick, A. J
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

Sixteen artificial billabongs on the floodplain of the River Murray, New South Wales, were surveyed over a 14-month period to observe the effect of different hydrological regimes on the development of aquatic macrophyte communities. The billabongs were initially planted with Vallisneria sp. and Myriophyllum papillosum Orch. in November 1994, then flooded. The 16 billabongs were divided into four treatments: summer flood, spring flood, permanent inundation, and a control treatment that was initially flooded and then allowed to vary in depth with rainfall and evaporation. The plant communities were surveyed on six occasions between April 1995 and June 1996, and percentage cover was estimated on each sampling occasion. Fourteen aquatic macrophyte taxa were recorded over the study period. Billabongs in the permanent and summer treatments exhibited less plant diversity than did billabongs in the control or spring treatments. Terrestrial plants germinated on the exposed areas in both spring and control treatments, but not in the other treatments.
X-Ray absorption spectroscopy of H3O+
Creators: name: Schwarz, Julius
name: Kielgast, Fridtjof
name: Baev, Ivan
name: Reinwardt, Simon
name: Trinter, Florian
name: Klumpp, Stephan
name: Perry-Sassmannshausen, Alexander
name: Mondes, Valerie
name: Flesch, Roman
name: Rühl, Eckart
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: X-ray absorption
subject: spectroscopy
subject: H3O+
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: We report the X-ray absorption of isolated H3O+ cations at the O 1s edge. The molecular ions were prepared in a flowing afterglow ion source which was designed for the production of small water clusters, protonated water clusters, and hydrated ions. Isolated H2O+ cations have been analyzed for comparison. The spectra show significant differences in resonance energies and widths compared to neutral H2O with resonances shifting to higher energies by as much as 10 eV and resonance widths increasing by as much as a factor of 5. The experimental results are supported by time-dependent density functional theory calculations performed for both molecular cations, showing a good agreement with the experimental data. The spectra reported here could enable the identification of the individual molecules in charged small water clusters or liquid water using X-ray absorption spectroscopy.
A note on $m$-factorizations of complete multigraphs arising from designs
Creators: name: Kiss, György
name: Rubio-Montiel, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C70, 51E23

description: Some new infinite families of simple, indecomposable $m$-factorizations of the complete multigraph $λK_v$ are presented. Most of the constructions come from finite geometries.
Deficient serotonin neurotransmission and depression-like serotonin biomarker alterations in tryptophan hydroxylase 2 (Tph2) loss-of-function mice
Creators: name: Flik, G
name: Cools, M J
name: Folgering, J H A
name: Siesser, W B
name: Peterson, S
name: Sachs, B D
name: Caron, M G
name: Jacobsen, J P R
name: Setola, V
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Probably the foremost hypothesis of depression is the 5-hydroxytryptamine (5-HT, serotonin) deficiency hypothesis. Accordingly, anomalies in putative 5-HT biomarkers have repeatedly been reported in depression patients. However, whether such anomalies in fact reflect deficient central 5-HT neurotransmission remains unresolved. We employed a naturalistic model of 5-HT deficiency, the tryptophan hydroxylase 2 (Tph2) R439H knockin mouse, to address this question. We report that Tph2 knockin mice have reduced basal and stimulated levels of extracellular 5-HT (5-HTExt). Interestingly, cerebrospinal fluid (CSF) 5-hydroxyindoleacetic acid (5-HIAA) and fenfluramine-induced plasma prolactin levels are markedly diminished in the Tph2 knockin mice. These data seemingly confirm that low CSF 5-HIAA and fenfluramine-induced plasma prolactin reflects chronic, endogenous central nervous system (CNS) 5-HT deficiency. Moreover, 5-HT1A receptor agonist-induced hypothermia is blunted and frontal cortex 5-HT2A receptors are increased in the Tph2 knockin mice. These data likewise parallel core findings in depression, but are usually attributed to anomalies in the respective receptors rather than resulting from CNS 5-HT deficiency. Further, 5-HT2A receptor function is enhanced in the Tph2 knockin mice. In contrast, 5-HT1A receptor levels and G-protein coupling is normal in Tph2 knockin mice, indicating that the blunted hypothermic response relates directly to the low 5-HTExt. Thus, we show that not only low CSF 5-HIAA and a blunted fenfluramine-induced prolactin response, but also blunted 5-HT1A agonist-induced hypothermia and increased 5-HT2A receptor levels are bona fide biomarkers of chronic, endogenous 5-HT deficiency. Potentially, some of these biomarkers could identify patients likely to have 5-HT deficiency. This could have clinical research utility or even guide pharmacotherapy.
Timing of Pulsars in the Globular Cluster Omega Centauri
Creators: name: Dai, S.
name: Johnston, S.
name: Kerr, M.
name: Berteaud, J.
name: Bhattacharyya, B.
name: Camilo, F.
name: Keane, E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the timing of the first five millisecond pulsars discovered in the globular cluster Omega Centauri and the discovery of a pulsar with a spin period of 3.68 ms. With a timing baseline of $\sim$3.5 yr we are able to measure the derivative of the spin frequency ($\dotν$) for the first five pulsars. Upper limits on the pulsar line-of-sight acceleration are estimated and compared with predictions based on analytical models of the cluster. We find that PSRs J1326$-$4728B and D show large negative accelerations, which are in tension with the minimum acceleration predicted by analytical models. We searched for pulsed $γ$-ray signals using 14.3 yr of data from the Fermi Large Area Telescope. Although we found no evidence for $γ$-ray pulsations, PSRs~J1326$-$4728A, B, C and E are associated with X-ray sources. This suggests that the observed $γ$-ray emission from Omega Centauri is likely caused by the emission of the ensemble of MSPs. Finally, the linearly polarised emission from PSR J1326$-$4728A yields a rotation measure of $-18\pm8$ rad m$^{-2}$.
description: 8 pages, 5 figures, MNRAS accepted
Grazer control and nutrient limitation of phytoplankton biomass in two Australian reservoirs
Creators: name: Matveev, Vladimir
name: Matveeva, Lilian
Publisher: name: La Trobe
Year: 2023

description: Murray-Darling Freshwater Research Centre

MDFRC item.

1. Grazer and nutrient controls of phytoplankton biomass were tested on two reservoirs of different productivity to assess the potential for zooplankton grazing to affect chlorophyll/phosphorus regression models under Australian conditions. Experiments with zooplankton and nutrients manipulated in enclosures, laboratory feeding trials, and the analysis of in-lake plankton time series were performed.2. Enclosures with water from the more productive Lake Hume (chlorophylla = 3–17.5 μg l–1), revealed significant zooplankton effects on chlorophyll a in 3/6, phosphorus limitation in 4/6 and nitrogen limitation in 1/6 of experiments conducted throughout the year. Enclosures with water from the less productive Lake Dartmouth (chlorophyll a = 0.8–3.5 μg l–1), revealed significant zooplankton effects in 5/6, phosphorus limitation in 5/6 and nitrogen limitation in 2/6 of experiments.3. While Lake Hume enclosure manipulations of the biomass of cladocerans (Daphnia and Diaphanosoma) and large copepods (Boeckella) had negative effects, small copepods (Mesocyclops and Calamoecia) could have positive effects on chlorophyll a.4. In Lake Hume, total phytoplankton biovolume was negatively correlated with cladoceran biomass, positively with copepod biomass and was uncorrelated with total crustacean biomass. In Lake Dartmouth, total phytoplankton biovolume was negatively correlated with cladoceran biomass, copepod biomass and total crustacean biomass.5. In both reservoirs, temporal variation in the biomass of Daphnia carinata alone could explain more than 50% of the observed variance in total phytoplankton biovolume.6. During a period of low phytoplankton biovolume in Lake Hume in spring–summer 1993–94, a conservative estimate of cladoceran community grazing reached a maximum of 0.80 day–1, suggesting that Cladocera made an important contribution to the development of the observed clear-water phase.7. Enclosure experiments predicted significant grazing when the Cladocera/Phytoplankton biomass ratio was greater than 0.1; this threshold was consistently exceeded during clear water phase in Lake Hume.8. Crustacean length had a significant effect on individual grazing rates in bottle experiments, with large Daphnia having highest rates. In both reservoirs, mean crustacean length was negatively correlated with phytoplankton biovolume. The observed upper limit of its variation was nearly twice as high compared to other world lakes.
Functional gene group analysis identifies synaptic gene groups as risk factor for schizophrenia
Creators: name: Holmans, P A
name: Cornelisse, L N
name: Hultman, C M
name: Toonen, R F
name: Verhage, M
name: Smit, A B
name: Lips, E S
name: Sullivan, P F
name: Posthuma, D
name: O'Donovan, M C
name: Visscher, P M
name: Min, J L
name: Purcell, S M
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Schizophrenia is a highly heritable disorder with a polygenic pattern of inheritance and a population prevalence of ∼1%. Previous studies have implicated synaptic dysfunction in schizophrenia. We tested the accumulated association of genetic variants in expert-curated synaptic gene groups with schizophrenia in 4673 cases and 4965 healthy controls, using functional gene group analysis. Identifying groups of genes with similar cellular function rather than genes in isolation may have clinical implications for finding additional drug targets. We found that a group of 1026 synaptic genes was significantly associated with the risk of schizophrenia (P=7.6 × 10−11) and more strongly associated than 100 randomly drawn, matched control groups of genetic variants (P<0.01). Subsequent analysis of synaptic subgroups suggested that the strongest association signals are derived from three synaptic gene groups: intracellular signal transduction (P=2.0 × 10−4), excitability (P=9.0 × 10−4) and cell adhesion and trans-synaptic signaling (P=2.4 × 10−3). These results are consistent with a role of synaptic dysfunction in schizophrenia and imply that impaired intracellular signal transduction in synapses, synaptic excitability and cell adhesion and trans-synaptic signaling play a role in the pathology of schizophrenia.
First sodium laser guide star asterism launching platform in China on 1.8m telescope at Gaomeigu Observatory
Creators: name: Wang, Rui-Tao
name: Li, Hong-Yang
name: Feng, Lu
name: Li, Min
name: Bian, Qi
name: Zuo, Jun-Wei
name: Jin, Kai
name: Wang, Chen
name: Liang, Yue
name: Wang, Ming
name: Dou, Jun-Feng
name: Zhang, Ding-Wen
name: Wei, Kai
name: Guo, You-Ming
name: Bo, Yong
name: Xue, Sui-Jian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The application of sodium laser guide star is the key difference between modern adaptive optics system and traditional adaptive optics system. Especially in system like multi-conjugate adaptive optics, sodium laser guide star asterism which is formed by several laser guide stars in certain pattern is required to probe more atmospheric turbulence in different directions. To achieve this, a sodium laser guide star asterism launching platform is required. In this paper, we will introduce the sodium laser guide star asterism launching platform built and tested on the 1.8m telescope of the Gaomeigu Observatory. The platform has two functions: one is to compare the performance of sodium laser guide stars generated by different lasers at the same place; the other is to generate sodium laser guide star asterism with adjustable shape. The field test results at the beginning of 2021 verify the important role of the platform, which is also the first time to realize sodium laser guide star asterism in China.
(:unas) unassigned
Creators: name: (:Unkn) Unknown
Publisher: name: Universita' degli Studi di Salerno
Year: 2024

description: Recensione
description: Recensione di IVAN PUPO, «Nessuno trionfa, tranne il caso». Le ultime novelle di Pirandello tra filologia e critica, Edizioni di pagina, Bari 2021, 291 pp.
A stellar occultation by the transneptunian object (50000) Quaoar observed by CHEOPS
Creators: name: Morgado, B. E.
name: Bruno, G.
name: Gomes-Júnior, A. R.
name: Pagano, I.
name: Sicardy, B.
name: Fortier, A.
name: Desmars, J.
name: Maxted, P. F. L.
name: Braga-Ribas, F.
name: Rauer, Heike
Publisher: name: Freie Universität Berlin
Year: 2022
Subjects: subject: methods: observational
subject: techniques: photometric
subject: occultations
subject: minor planets
subject: asteroids: individual: Quaoar
subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften

description: Context. Stellar occultation is a powerful technique that allows the determination of some physical parameters of the occulting object. The result depends on the photometric accuracy, the temporal resolution, and the number of chords obtained. Space telescopes can achieve high photometric accuracy as they are not affected by atmospheric scintillation. Aims. Using ESA’s CHEOPS space telescope, we observed a stellar occultation by the transneptunian object (50000) Quaoar. We compare the obtained chord with previous occultations by this object and determine its astrometry with sub-milliarcsecond precision. Also, we determine upper limits to the presence of a global methane atmosphere on the occulting body. Methods. We predicted and observed a stellar occultation by Quaoar using the CHEOPS space telescope. We measured the occultation light curve from this dataset and determined the dis- and reappearance of the star behind the occulting body. Furthermore, a ground-based telescope in Australia was used to constrain Quaoar’s limb. Combined with results from previous works, these measurements allowed us to obtain a precise position of Quaoar at the occultation time. Results. We present the results obtained from the first stellar occultation by a transneptunian object using a space telescope orbiting Earth; it was the occultation by Quaoar observed on 2020 June 11. We used the CHEOPS light curve to obtain a surface pressure upper limit of 85 nbar for the detection of a global methane atmosphere. Also, combining this observation with a ground-based observation, we fitted Quaoar’s limb to determine its astrometric position with an uncertainty below 1.0 mas. Conclusions. This observation is the first of its kind, and it shall be considered as a proof of concept of stellar occultation observations of transneptunian objects with space telescopes orbiting Earth. Moreover, it shows significant prospects for the James Webb Space Telescope.
Deep $z$-band observations of the coolest Y dwarf
Creators: name: Kopytova, Taisiya G.
name: Crossfield, Ian J. M.
name: Deacon, Niall R.
name: Brandner, Wolfgang
name: Buenzli, Esther
name: Bayo, Amelia
name: Schlieder, Joshua E.
name: Manjavacas, Elena
name: Biller, Beth A.
name: Kopon, Derek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: WISE J085510.83-071442.5 (hereafter, WISE 0855-07) is the coolest Y dwarf known to date and is located at a distance of 2.31$\pm 0.08$ pc, giving it the fourth largest parallax of any known star or brown dwarf system. We report deep $z$-band observations of WISE 0855-07 using FORS2 on UT1/VLT. We do not detect any counterpart to WISE 0855-07 in our $z$-band images and estimate a brightness upper limit of AB mag $>$ 24.8 ($F_ν$ $
description: 13 pages, 3 figures; accepted to ApJ
title: Διερεύνηση της επιρροής του επαγγέλματος των εκπαιδευτικών πρωτοβάθμιας εκπαίδευσης στην προσωπική τους ζωή
title: Investigating the influence of primary education teachers' profession on their personal lives
titleType: AlternativeTitle
Creators: name: Λυσανδροπούλου, Φωτεινή
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Επαγγελματικά καθήκοντα
subject: Επάγγελμα εκπαιδευτικού
subject: Λειτούργημα
subject: Επαγγελματική και προσωπική ζωή εκπαιδευτικών

description: Αντικείμενο της παρούσας διπλωματικής εργασίας αποτελεί το επάγγελμα του εκπαιδευτικού της Πρωτοβάθμιας Εκπαίδευσης, και κατά πόσο αυτό επηρεάζει άλλες πτυχές της ζωής του. Η διερεύνηση του θέματος γίνεται μέσα από βιβλιογραφική ανασκόπηση επιστημονικών αναλύσεων της Ευρωπαϊκής Επιτροπής, καθώς και μέσα από την ανάλυση των αποτελεσμάτων σχετικών ερευνών. Αρχικά, παρουσιάζονται τα διάφορα εκπαιδευτικά συστήματα που συναντώνται στον κόσμο, τα ιδιαίτερα χαρακτηριστικά τους και στη συνέχεια περιγράφονται λεπτομερώς, τα καθήκοντα των εκπαιδευτικών. Σημαντικό μέρος της εργασίας καταλαμβάνει η περιγραφή της δομής των εκπαιδευτικών συστημάτων και ο διαχωρισμός τους. Επιπρόσθετα, αναλύονται και περιγράφονται οι συνθήκες εργασίας των εκπαιδευτικών στα εκπαιδευτικά συστήματα της Γαλλίας, της Φινλανδίας και της Ελλάδας. Τέλος, επιχειρείται μέσω της έρευνας να δοθεί μια απάντηση στο ερώτημα αν το επάγγελμα του εκπαιδευτικού αποτελεί λειτούργημα, αλλά και να εξεταστούν οι επιπτώσεις που μπορεί να επιφέρει αυτή η ταύτιση του επαγγελματικού βίου με τον προσωπικό, εις βάρος του δεύτερου.