cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Δομή και λειτουργία οικολογικών συστημάτων: μία μεθοδολογική ανασυγκρότηση
Creators: name: Σχίζας, Δημήτριος Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Θεωρία δρώντων δικτύων
Οικοσύστημα
Ολισμός
Συστημική οικολογία
Epistemology
Actor network theory
Ecosystem
System ecology
Holism

description: Το ερευνητικό ερώτημα που πραγματεύεται η διατριβή είναι το αν η οικολογική θεωρία των δικτύων(ΟΘΔ) που διατυπώνουν συστημικοί οικολόγοι όπως ο Bernard Patten καταφέρνει να ανασκευάσει το παλαιό και ξεπερασμένο παράδειγμα της συστημικής οικολογίας με τρόπο που θα το ξαναφέρει στο προσκήνιο. Η απάντηση βασίζεται σε ένα μεταθετιστικό επιστημολογικό πλαίσιο το οποίο και ορίζει την υπόθεση εργασίας : για να αναβιώσει η συστημική οικολογία θα πρέπει η ΟΔΘ α)να εναρμονιστεί με τις κυρίαρχες ιδέες και ανάγκες β)να απαντήσει στα προβλήματα που εξασθένησαν την επιρροή του παλαιού πεδίου. Η μεθοδολογία περιλαμβάνει τν ανάλυση δημοσιευμένων επιστημονικών άρθρων του Patten και των συνεργατών του, σε πίνακες περιεχομένου. Το συμπέρασμα είναι ότι η ΟΔΘ απαντά με αρκετή επιτυχία στο πρόβλημα της ελλιπούς αυτονομίας του παλαιού πεδίου αλλά αδυνατή να εναρμονιστεί με το κυρίαρχο κοινωνικό κοσμοείδωλο. Ο λόγος είναι ότι αποφεύγει να έρθει σε ρήξη με τις ιδεολογικές προδιαγραφές του παλαιού πεδίου, πράγμα που εν τέλει καθιστά αμφίβολο το ανα η ΟΔΘ θα έχει την αποδοχή που έχουν οι δικτυακές μεταμοντέρνες θεωρίες
description: The basic question posed is weather the ecological network theory(ENT) recoustructs successfully the old and weakened ecosystem paradigm and puts it again on the fore. The answer is based on a post-positivistic epistemological framework, which formulates research hypothesis as follow : the field of Ecosystem Studies would recapture its strength if ENT achieves to a)converge ideologically with dominant social ideas and b)overcome the problems interior to the old field the final conclusion is that ENT comes to enhance the autonomy of the old field but fails to comply with the contemporary social ideas and demands because it avoids conflicting with the ideological viewpoint through which the old paradigm perceives the research object. Thus, we argue that the revised ecosystem paradigm will not flourish as other post-modern network ideas do
Διερεύνηση του ρόλου των μορφογενετικών πρωτεϊνών των οστών σε φυσιολογικούς και παθολογικούς ιστούς
Creators: name: Χέβα, Αγγελική Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Παραγαγγλιώματα
Φαιοχρωμοκυτώματα
Γλοιοβλαστώματα
Αδενοκαρκινώματα γαστρεντερικού συστήματος
paraganglioma
Pheochromocytoma
Glioblastoma
Gastric adenocarcinoma

description: Οι μορφογενετικές πρωτεϊνες των οστών(BMPs) ανήκουν στην οικογένεια του TGF-β και συνδεόμενη με τους αντίστοιχους υποδοχείς ενεργοποιούν γονίδια-στόχους στον πυρήνα του κυττάρου. ετσι διδραματίζουν σημαντικό ρόλο στην απόπτωση, τον πολλαπλασιασμό, την διαφοροποίηση, την επιβίωση φυσιολογικών και νεοπλασματικών κυττάρων. Η μελέτη μας έχει σκοπό την διερεύνηση του ρόλου τους στα εξής νεοπλάσματα : Παραγαγγλιώματα-Φαιοχρωμοκυτώματα, Γλοιβλαστώματα και Αδενοκαρκινώματα στομάχου και παχέος εντέρου. Αυτό έγινε με την βοήθεια της ανοσοϊστοχημείας και διαπιστώθηκαν τα παρακάτω : οι BMPs εκφράζονται τόσο στα φαιοχρωμλυτώματα όσο και στα παραγγαγλιώματα αλλά εντονότερα και πιο εκτεταμένα στα πρώτα. Στα γλοιοβλαστώματα η ΒΜΡ-6 και ο υποδοχέας BMPRIa εκφράζονται χαμηλότερα. Οι BMPs και οι υποδοχείς τους εκφράζονται σε μεγαλύτερες ποσότητες στα κύτταρα αδενοκαρκινωμάτων στομάχων εντερικού τύπου απ'οτι στα διαχύτου τύπου καθώς και στα κύτταρα των μεταστατικών εστιών απ΄οτι στην πρωτοπαθή εστία
description: Bone morphogenetic proteins(BMPs) are myltifunctional cytokines which belong to the TGF-β superfamily of signaling molecules. They play an important role in the differentiation, proliferation, apoptosis and survival of different cell types(normal and neoplastic ones). In this study we have investigated the expression of BMPs and their receptors in neoplasms of central nervous system(glioblastomas) of the system of paraganglia(paragangliomas and pheochromocyptomas) and of the gastrointestinal system (gastric adenocarcunomas and adenocarcinomas of large bowel). We used polyclonal antibodies adn the intensity and the extent of the immunohistochemical expression were graded semiquantitatively. BMPs and their receptors expressed in both paragangliomas and pheochromocytomas, but more intensely and extensively in pheochromocytomas. The glioblastomas were characterized by low expression of BMP-6 and BMPRIa. BMPs and their receptors were expressed both in gastric adenocarcinomas and in adenocarcinomas of large bowel with differences between the subtypes of gastric cancer and between the neoplastic cells of the primary tumors and these of the nodal metastases
Spin-dependent tunneling in modulated structures of (Ga,Mn)As
Creators: name: Sankowski, P.
name: Kacman, P.
name: Majewski, J. A.
name: Dietl, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A model of coherent tunneling, which combines multi-orbital tight-binding approximation with Landauer-Büttiker formalism, is developed and applied to all-semiconductor heterostructures containing (Ga,Mn)As ferromagnetic layers. A comparison of theoretical predictions and experimental results on spin-dependent Zener tunneling, tunneling magnetoresistance (TMR), and anisotropic magnetoresistance (TAMR) is presented. The dependence of spin current on carrier density, magnetization orientation, strain, voltage bias, and spacer thickness is examined theoretically in order to optimize device design and performance.
description: 9 pages, 13 figures, submitted to PRB
Observation and resonant x-ray optical interpretation of multi-atom resonant photoemission effects in O 1s emission from NiO
Creators: name: Mannella, N.
name: Yang, S. -H.
name: Mun, B. S.
name: de Abajo, F. J. Garcia
name: Kay, A. W.
name: Sell, B. C.
name: Watanabe, M.
name: Ohldag, H.
name: Arenholz, E.
name: Young, A. T.
name: Hussain, Z.
name: Van Hove, M. A.
name: Fadley, C. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present experimental and theoretical results for the variation of the O 1s intensity from a NiO(001) surface as the excitation energy is varied through the Ni 2p1/2,3/2 absorption resonances, and as the incidence angle of the radiation is varied from grazing to larger values. For grazing incidence, a strong multi-atom resonant photoemission (MARPE) effect is seen on the O 1s intensity as the Ni 2p resonances are crossed, but its magnitude decreases rapidly as the incidence angle is increased. Resonant x-ray optical (RXRO) calculations are found to predict these effects very well, although the experimental effects are found to decrease at higher incidence angles faster than those in theory. The potential influence of photoelectron diffraction effects on such measurements are also considered, including experimental data with azimuthal-angle variation and corresponding multiple-scattering-diffraction calculations, but we conclude that they do not vary beyond what is expected on the basis of the change in photoelectron kinetic energy. Varying from linear polarization to circular polarization is found to enhance these effects in NiO considerably, although the reasons are not clear. We also discuss the relationship of these measurements to other related interatomic resonance experiments and theoretical developments, and make some suggestions for future studies in this area.
description: Phys. Rev. B, in press
Quasi-periodic attractors, Borel summability and the Bryuno condition for strongly dissipative systems
Creators: name: Gentile, Guido
name: Bartuccelli, Michele V.
name: Deane, Jonathan H. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 37C10, 37C55, 37C60, 40C15, 40D05

description: We consider a class of ordinary differential equations describing one-dimensional analytic systems with a quasi-periodic forcing term and in the presence of damping. In the limit of large damping, under some generic non-degeneracy condition on the force, there are quasi-periodic solutions which have the same frequency vector as the forcing term. We prove that such solutions are Borel summable at the origin when the frequency vector is either any one-dimensional number or a two-dimensional vector such that the ratio of its components is an irrational number of constant type. In the first case the proof given simplifies that provided in a previous work of ours. We also show that in any dimension $d$, for the existence of a quasi-periodic solution with the same frequency vector as the forcing term, the standard Diophantine condition can be weakened into the Bryuno condition. In all cases, under a suitable positivity condition, the quasi-periodic solution is proved to describe a local attractor.
description: 10 pages
A new reduced network to simulate detonations in superbursts from mixed H/He accretors
Creators: name: Noel, C.
name: Goriely, S.
name: Busegnies, Y.
name: Papalexandris, M. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We construct a new reduced nuclear reaction network able to reproduce the energy production due to the photo-disintegration of heavy elements such as Ru, which are believed to occur during superbursts in mixed H/He accreting systems. We use this network to simulate a detonation propagation, inside a mixture of C/Ru. As our reference, we use a full nuclear reaction network, including 14758 reactions on 1381 nuclides. Until the reduced and full networks converge to a good level of accuracy in the energy production rate, we iterate between the hydrodynamical simulation, with a given reduced network, and the readjustment of a new reduced network, on the basis of previously derived hydrodynamical profiles. We obtain the thermodynamic state of the material after the passage of the detonation, and the final products of the combustion. Interestingly, we find that all reaction lengths can be resolved in the same simulation. This will enable C/Ru detonations to be more easily studied in future multi-dimensional simulations, than pure carbon ones. We underline the dependence of the combustion products on the initial mass fraction of Ru. In some cases, a large fraction of heavy nuclei, such as Mo, remains after the passage of the detonation front. In other cases, the ashes are principally composed of iron group elements.
description: 6 pages, 12 figures
Noise Correlations in a Coulomb Blockaded Quantum Dot
Creators: name: Zhang, Y.
name: DiCarlo, L.
name: McClure, D. T.
name: Yamamoto, M.
name: Tarucha, S.
name: Marcus, C. M.
name: Hanson, M. P.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report measurements of current noise auto- and cross-correlation in a tunable quantum dot with two or three leads. As the Coulomb blockade is lifted at finite source-drain bias, the auto-correlation evolves from super-Poissonian to sub-Poissonian in the two-lead case, and the cross-correlation evolves from positive to negative in the three-lead case, consistent with transport through multiple levels. Cross-correlations in the three-lead dot are found to be proportional to the noise in excess of the Poissonian value in the limit of weak output tunneling.
Ατμοσφαιρική ρύπανση-μετεωρολογία σε αστικό περιβάλλον υπό συνθήκες υψηλού υπόβαθρου
Creators: name: Παπαναστασίου, Δημήτρης Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Αιωρούμενα σωματίδια
Όζον
Θαλάσσια αύρα
Ozone
Particulate matter
Sea breeze
Βόλος
Volos(Greece)

description: Το αντικείμενο της Διατριβής είναι η μελέτη της ατμοσφαιρικής ρύπανσης και της μετεωρολογίας στην αστική περιοχή του Βόλου, όπου η συγκέντρωση υποβάθρου κάποιων ρύπων είναι αρκετά υψηλή. Η Διατριβή αναδεικνύει τα στατιστικά χαρακτηριστικά του όζοντος και των ΡΜ10, παρουσιάζοντας αποτελέσματα που απεικονίζουν την ετήσια, εβδομαδιαία και ημερήσια πορεία των δύο αυτών ρύπων. Επίσης, εξετάζεται αν πληρούνται τα όρια ποιότητα της ατμόσφαιρας που έχουν καθοριστεί για τους ρύπους αυτούς με τις Οδηγίες της Ευρωπαϊκής Ένωσης. Στη συνέχεια έγινε ποιοτική και ποσοτική εκτίμηση της συγκέντρωσης υποβάθρου του όζοντος κατά τη διάρκεια του καλοκαιριού με την εφαρμογή του φωτοχημικού μοντέλου UAM και αποδείχθηκε ότι η συγκέντρωση υποβάθρου του όζοντος στην υπό μελέτη περιοχή διατηρείται σε υψηλά επίπεδα. Κατόπιν, εξετάστηκε διεξοδικά η σχέση της συγκέντρωσης του όζοντος και των ΡΜ10 με διάφορες μετεωρολογικές μεταβλητές, οι οποίες χρησιμοποιήθηκαν για τη βραχυχρόνια πρόγνωση της συγκέντρωσής τους μέσω διαφόρων τεχνικών (πολλαπλή γραμμική παλινδρόμηση, νευρωνικό δίκτυο). Ακόμη, μελετήθηκε λεπτομερώς το σύστημα κυκλοφορίας της θαλάσσιας αύρας που αναπτύσσεται πολύ συχνά στην περιοχή. Συγκεκριμένα, καθορίστηκαν τα χαρακτηριστικά της θαλάσσιας αύρας, αναπτύχθηκε μια τεχνική για την πρόγνωση της εμφάνισής της και διερευνήθηκε η επίδρασή της στα επίπεδα ρύπανσης της περιοχής. Τέλος, με τη βοήθεια του προγνωστικού μοντέλου WRF προσομοιώθηκε το πεδίο ροής του ανέμου στην ευρύτερη περιοχή του Νομού Μαγνησίας και εξάχθηκαν τα χαρακτηριστικά του
description: The title of this dissertation is "Atmospheric pollution and meteorology in an urban environment under high background pollution levels". The study area is the greater urban agglomeration of Volos, a medium sized coastal city in central Greece. A statistical analysis of ozone and PM10 concentration levels was carried out, which revealed information concerning their annual, weekly and diurnal variation. Also, it was investigated whether the air quality standards that are established by European Union are fulfilled. Furthermore, a qualitative and quantitative calculation of the background ozone concentration levels during summer was attempted by applying the photochemical model UAM. Moreover, models were developed and tested, relating ozone and PM10 concentration with various meteorological and pollution variables. Additionally, this research investigates the characteristics of the sea breeze that is developing in Volos area, defines a critical value of sea breeze index that could predict precisely the occurrence of a sea breeze system and studies sea breeze's influence on concentration levels of ozone and PM10. Finally, the wind field was produced by applying the weather prediction model WRF
Evidence for strong evolution of the cosmic star formation density at high redshift
Creators: name: Mannucci, F.
name: Buttery, H.
name: Maiolino, R.
name: Marconi, A.
name: Pozzetti, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Deep HST/ACS and VLT/ISAAC data of the GOODS-South field were used to look for high-redshift galaxies in the rest-frame UV wavelength range and to study the evolution of the cosmic star-formation density at z~7. The GOODS-South area was surveyed down to a limiting magnitude of about (J+Ks)=25.5 looking for drop-out objects in the z ACS filter. The large sampled area would allow for the detection of galaxies which are 20 times less numerous and 1-2 magnitudes brighter than similar studies using HST/NICMOS near-IR data. Two objects were initially selected as promising candidates of galaxies at z~7, but have subsequently been dismissed and identified as Galactic brown dwarfs through a detailed analysis of their morphology and Spitzer colors, as well as through spectroscopic information. As a consequence, we conclude that there are no galaxies at z~7 down to our limiting magnitude in the field we investigated. Our non detection of galaxies at z~7 provides clear evidence for a strong evolution of the luminosity function between z=6 and z=7, i.e. over a time interval of only ~170 Myr. Our constraints also provide evidence for a significant decline of the total star formation rate at z=7, which must be less than 40% of that at z=3 and 40-80% of that at z=6. We also derive an upper limit to the ionizing flux at z=7, which is only marginally consistent with that required to completely ionize the Universe.
description: 11 pages, A&A, in press. New version after proof correction
Local Collaborative Autoencoders
Creators: name: Choi, Minjin
name: Jeong, Yoonki
name: Lee, Joonseok
name: Lee, Jongwuk
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Top-N recommendation is a challenging problem because complex and sparse user-item interactions should be adequately addressed to achieve high-quality recommendation results. The local latent factor approach has been successfully used with multiple local models to capture diverse user preferences with different sub-communities. However, previous studies have not fully explored the potential of local models, and failed to identify many small and coherent sub-communities. In this paper, we present Local Collaborative Autoencoders (LOCA), a generalized local latent factor framework. Specifically, LOCA adopts different neighborhood ranges at the training and inference stages. Besides, LOCA uses a novel sub-community discovery method, maximizing the coverage of a union of local models and employing a large number of diverse local models. By adopting autoencoders as the base model, LOCA captures latent non-linear patterns representing meaningful user-item interactions within sub-communities. Our experimental results demonstrate that LOCA is scalable and outperforms state-of-the-art models on several public benchmarks, by 2.99~4.70% in Recall and 1.02~7.95% in NDCG, respectively.
description: In Proceedings of the Fourteenth ACM Inter-national Conference on Web Search and Data Mining. 9 pages
Living statues
Creators: name: Jormakka, Kari
Publisher: name: Austrian Journal of Historical Studies
Year: 2001

description: The author looks at the notion of movement in architecture, beginning with Futu- rism. Artists such as Boccioni, Marinetti and Sant'Elia expressively turned »the art of the becoming, the perishable, the transitory and the expendable« into their central concern, but unfortunately, they were never able to bring their projects to successful completion. Using the Futurist manifesto as a starting point, the author investigates theoretical debates throughout the ages pertaining to the notion of movement in art and architecture. The analysis looks at the concept of statues in ancient Egypt and Greece, describes the unsettling impact that photography caused in artistic circles towards the end of the 19th century, and continues right up to the philosophical discussions on space and duration by Henri Bergson and Edmund Husserl. Identifying a resemblance between Husserl's notion of Nahsphären and the Deleuzean notion of >smooth< - as opposed to >striated< - space, these discussions are then linked to current trends and concepts in architecture, such as the Hydrogen House in Vienna, designed by Greg Lynn.
description: Austrian Journal of Historical Studies, Bd. 12 Nr. 3 (2001): Architekturen
Η Μητρόπολη Θεσσαλονίκης από τα μέσα του 8ου αι. έως το 1430: ιεραρχική τάξη-εκκλησιαστική περιφέρεια-διοικητική οργάνωση
Creators: name: Χατζηαντωνίου, Ελισάβετ Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Ιεραρχική τάξη
Εκκλησιαστική οργάνωση
Οφφικιάλιοι
Hierarchical order
Church administration
Church offices/officia

description: Το θέμα της διατριβής αφορά στην εκκλησιαστική διοίκηση της μητρόπολης της Θεσσαλονίκης από τα μέσα του 8ου έως το 1430. Επειτα από την παράθεση μιας ιστορικής αναδρομής στο κύριο μέρος ασχολούμαστε με την τάξη που έλαβε η μητρόπολη στην ιεραρχία του Πατριαρχείου Κωνσταντινουπόλεως και τον χαρακτήρα της ιεραρχικής της εξέλιξης. Αναφερόμαστε ακόμη στους τίτλους που αποδόθηκαν κατά καιρούς στους μητροπολίτες Θεσ/νικης και στις προσφωνήσεις που του αποδίδονταν. Σε ξεχωριστό κεφάλαιο περιγράφουμε την εκκλησιαστική περιφέρεια της μητρόπολης και τη διαίρεση της σε επισκοπές. Διερευνούμε επίσης το βαθμό συσχετισμού και αλληλεπίδρασης της πολιτικής διοικητικής οργάνωσης με την εκκλησιαστική οργάνωση της περιοχής. Στο τελευταίο μέρος παρουσιάζουμε τον θεσμό της μητροπολιτικής συνόδου και τις αρμοδιότητές της. Τέλος ανασυνθέτουμε κατά το δυνατό την οργάνωση των υπηρεσιών(σεκρέτων) της μητρόπολης. Κλείνουμε καταγράφοντας τα συμπεράσματα της μελέτης μας και παραθέτουμε δύο καταλόγους των μητροπολιτών της περιόδου, εννέα βοηθητικούς πίνακες και επτά χάρτες της πολιτικής και εκκλησιαστικής γεωγραφίας της περιοχής
description: The subject of our study is about the administration of the archbishopic of Thessaloniki from the mid-eighth century to 1430. After an introductory chapter we study the hierarchical order of the archbishopric of Thessaloniki in the patriarchate of Constantinople and the character of its evolution. We also refer to the titles of the archibishops and the ways they were adressed. In the third part we describe the prefecture of the archbishopric and the administrative division in bishoprics. We also study the corelation between the civic and ecclesiastical organisation of the region. In the last part we present the function and the role of the metropolitan Synod. In the end we demonstrate the different offices of the archbishopric(secreta). We close our study by presenting the conclusions and giving a catalogue of the metropolitans(mid 8th c. - 1430), nine tables and seven maps of the region
Nonanalytic Magnetic Response of Fermi- and non-Fermi Liquids
Creators: name: Maslov, Dmitrii L.
name: Chubukov, Andrey V.
name: Saha, Ronojoy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the nonanalytic behavior of the static spin susceptibility of 2D fermions as a function of temperature and magnetic field. For a generic Fermi liquid, χ_s (T, H)= const+c_1 max (T,μ_B|H|), where c_1 is shown to be expressed via complicated combinations of the Landau parameters, rather than via the backscattering amplitude, contrary to the case of the specific heat. Near a ferromagnetic quantum critical point, the field dependence acquires a universal form χ^{-1}_s(H)= const- c_2|H|^{3/2}$, with $c_2>0$. This behavior implies a first-order transition into a ferromagnetic state. We establish a criterion for such a transition to win over the transition into an incommensurate phase.
description: 5 pages, 1 figure
Oligotrichum obtusatum Broth.
Creators: name: Zhao, Wei
name: Wang, Zhaoming
name: Zheng, Lina
name: Naren, Gaowa
name: He, Qiang
name: Han, Wei
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Polytrichales
Polytrichaceae
Oligotrichum
Oligotrichum obtusatum

description: Oligotrichum obtusatum Broth.
Materials
Type status: Other material. Occurrence: catalogNumber: PE 2155874; recordNumber: 12176; recordedBy: Q. He; occurrenceID: D9CB2D58-4FEC-5582-940F-61363733E69C; Taxon: order: Polytrichales; family: Polytrichaceae; genus: Oligotrichum; Location: continent: Asia; country: China; countryCode: China / CN; stateProvince: Tibet; county: Jilong; municipality: Jilong; locality: Latola; verbatimLocality: Shigatse; verbatimElevation: 3954 m; verbatimCoordinates: 28 º 23 ′ 26 " N, 85 º 24 ′ 25 " E; Identification: identifiedBy: Y. Jia and Q. He; Event: year: 2018; month: 6; day: 17; habitat: On the roadside soil surface; Record Level: language: cn
Description
Plants rather small, 0.5-1.2 cm high, brownish green to reddish-brown, often in tufts (Fig. 1 a and b). Leaves nearly oblong-oval (Fig. 1 c), 1.5-2.0 × 0.5-1.0 mm, usually concave; margins serrate; costa somewhat broad, ending near the apex (Fig. 1 e); ventral lamellae slightly wavy or crisped, usually in 3-10 rows, 3-5 cells high; on leaf back with only a few spines (Fig. 1 c); median leaf cells rounded quadrate to irregularly oval, 9-15 μm wide; basal cells elongate or irregularly rectangular, 18-25 × 8-16 μm, slightly thick-walled (Fig. 1 f-h). Dioecious. Perichaetial leaves lanceolate above, sheathing at base (Fig. 1 d). Setae reddish-brown, straight; capsules oblong-ovoid to shortly cylindrical, usually curved; peristome teeth 32; opercula conical, shortly beaked. Calyptrae cucullate, smooth. Spores spherical, ca. 10 μm in diameter, finely papillose (Wu and Jia 2004).
Distribution
China (Tibet [present study]; Guizhou, Yunnan and Fujian, India and Nepal (Hyvönen and Lai 1991, Wu and Jia 2004).
description: Published as part of Zhao, Wei, Wang, Zhaoming, Zheng, Lina, Naren, Gaowa, He, Qiang & Han, Wei, 2024, A step forward in botanical exploration with three new Polytrichaceae records from Tibet, China, pp. e 133971 in Biodiversity Data Journal 12 on page e133971, DOI: 10.3897/BDJ.12.e133971
Use and Abuse of a Fractional Fokker-Planck Dynamics for Time-Dependent Driving
Creators: name: Heinsalu, E.
name: Patriarca, M.
name: Goychuk, I.
name: Hänggi, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate a subdiffusive, fractional Fokker-Planck dynamics occurring in time-varying potential landscapes and thereby disclose the failure of the fractional Fokker-Planck equation (FFPE) in its commonly used form when generalized in an {\it ad hoc} manner to time-dependent forces. A modified FFPE (MFFPE) is rigorously derived, being valid for a family of dichotomously alternating force-fields. This MFFPE is numerically validated for a rectangular time-dependent force with zero average bias. For this case subdiffusion is shown to become enhanced as compared to the force free case. We question, however, the existence of any physically valid FFPE for arbitrary varying time-dependent fields that differ from this dichotomous varying family.
description: 4 pages, 2 figures
Oblique electromagnetic instabilities for an ultra relativistic electron beam passing through a plasma
Creators: name: Bret, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present an investigation of the electromagnetic instabilities which are trig gered when an ultra relativistic electron beam passes through a plasma. The linear growth rate is computed for every direction of propagation of the unstable modes, and temperatures are modelled using simple waterbag distribution functions. The ultra relativistic unstable spectrum is located around a very narrow band centered on a critical angle which value is given analytically. The growth rate of modes propagating in this direction decreases like k^(-1/3).
description: 5 pages, 3 figures, to appear in EuroPhysics Letters
Η διαμόρφωση των λόγων διαζυγίου κατά το κυπριακό δίκαιο: μία συγκριτική ενδοσκόπηση του ελληνικού και αγγλικού δικαίου
Creators: name: Σεργίδης, Γιώργος Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Λύση γάμου
Μοιχεία
Εγκατάλειψη
Dissolution of marriage
Adultery
Desertion

description: Στόχος αυτής της διατριβής είναι η συστηματική εξέταση και κριτική των λόγων διαζυγίου στην Κύπρο, όπως διαμορφώθηκαν από τους αρχαιότατους χρόνους μέχρι σήμερα με συγκριτική επισκόπηση του ελληνικού και αγγλικού δικαίου. Η παρούσα διατριβή αποτελεί έναν απολογισμό του ουσιαστικού έργου του Οικογενειακού Δικαστηρίου στην Κύπρο. Αποτελεί επίσης μια πραγματεία υπέρ της αρχής της αιτιότητας ή κατάρρευσης του γάμου, η οποία θεωρεί το διαζύγιο ως επισφράγιση της αποτυχίας του γάμου και ταυτόχρονα ως θεραπεία. Υποστηρίζεται πως το κυπριακό δίκαιο δεν έχει ενιαία φυσιογνωμία και θα μπορούσε να χαρακτηριστεί ως ένας νομικός λαβύρινθος, αφού για την εφαρμογή του έχουν σημασία εκτός από την κοινότητα, την ιθαγένεια και τη θρησκεία, και ο χρόνος και τόπος τέλεσης του γάμου. Γίνεται πρόταση για καθιέρωση του συναινετικού διαζυγίου και του θεσμού της διαμεσολάβησης. Γίνονται τέλος διάφορες προτάσεις για ενοποίηση και απλούστευση των λόγων διαζυγίου με σκοπό οι λόγοι αυτοί να μην οξύνουν τις αντιπαραθέσεις αλλά να βοηθούν τα μέρη να λύουν φιλικά το γάμος τους
description: The purpose of this dissertation is the systematic examination and critique of the grounds in Cyprus as they have evolved from ancient times until the present, with a comparative reference to greek and english law. This thesis comprises a review of the core work of the Family Court in Cyprus. It also constitutes a thesis in favour of the principle of causation, otherwise known as the breakdown of the marriage, which regards divorce as merely the confirmation of the failure of the marriage and simultaneously as a cure for it. It is asserted that Cyprus law does not have a cohesive identity and could be characterized as a legal labyrinth, since for its application, apart from the community, nationality and religion, the time and place of the celebration of the marriage are also relevant. It is proposed that divorce by consert and mediation should be established in Cyprus. In conclusion, various proposals are made for the unification and simplification of the grounds for divorce in order to preclude the possibility of them worsening the acrimony and instead, aid the parties in amicably dissolving their marriage
Das neu eröffnete Technische Museum Wien - Anmerkungen zur Rezension von Siegfried Mattl
Creators: name: Lackner, Helmut
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2001

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 12 Nr. 3 (2001): Architekturen
Photodetachment and Test-Particle Simulation Constraints on Negative Ions in Solar System Plasmas
Creators: name: Desai, Ravindra T.
name: Zhang, Zeqi
name: Wu, Xinni
name: Lue, Charles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Geophysics (physics.geo-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Negative ions have been detected in abundance in recent years by spacecraft across the solar system. These detections were, however, made by instruments not designed for this purpose and, as such, significant uncertainties remain regarding the prevalence of these unexpected plasma components. In this article, the phenomenon of photodetachment is examined and experimentally and theoretically derived cross-sections are used to calculate photodetachment rates for a range of atomic and molecular negative ions subjected to the solar photon spectrum. These rates are applied to negative ions outflowing from Europa, Enceladus, Titan, Dione and Rhea and their trajectories are traced to constrain source production rates and the extent to which negative ions are able to pervade the surrounding space environments. Predictions are also made for further negative ion populations in the outer solar system with Triton used as an illustrative example. This study demonstrates how, at increased heliocentric distances, negative ions can form stable ambient plasma populations and can be exploited by future missions to the outer solar system.
description: Planetary Science Journal Article, accepted 05 April 2021. Preprint contains 21 pages, 8 figures, 1 table
Im Zeichen der Immersion. Zur Architektur des Jüdischen Museums Berlin
Creators: name: Drescher, Bettina
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2001

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 12 Nr. 3 (2001): Architekturen
Ο Οικουμενικός Πατριάρχης Κωνσταντινουπόλεως Γρηγόριος ΣΤ' ο Φουρτουνιάδης εν μέσω εθνικών και εθνοφυλετικών ανταγωνισών
Creators: name: Χαμχούγιας, Χρήστος Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Βουλγαρικό Ζήτημα
Εθνοφυλετισμός
National rivalries
Bulgarian ecclesiastical question

description: Μέ τήν συστηματική παράθεση βιογραφικών καί εργογραφικών στοιχείων,επιχειρήθηκε η ανάσυρση από τήν λήθη καί η ιστορική αποκατάσταση τής προσωπικότητος τού Οικουμενικού Πατριάρχου Κωνσταντινουπόλεως Γρηγορίου ΣΤ΄.Περιγράφηκε η ακολουθούμενη από τήν Μεγάλη Εκκλησία οικουμενική,δηλαδή υπερεθνική,υπερφυλετική καί υπερταξική πολιτική,σέ αντιπαραβολή πρός τούς αναδυόμενους εθνικισμούς τού 19ου αιώνα.Εξετάστηκε η κατάσταση εντός τής Ορθοδόξου Εθνοθρησκευτικής Κοινότητας καί οι σχέσεις μεταξύ Ορθοδόξων-Ετεροδόξων χριστιανών.Ακολούθησε ευρεία επισκόπηση τής πολιτικής καταστάσεως τής εποχής μέ έμφαση στούς συσχετισμούς ισχύος τών Μεγάλων Δυνάμεων,καθώς επίσης καί στίς Οθωμανικές Μεταρρυθμίσεις.Ιδιαιτέρας αναπτύξεως έτυχαν τα ζητήματα τών Εκκλησιών Επτανήσου,Ελλάδος,Βουλγαρίας,Ρουμανίας,τής αναθεωρήσεως τών Εθνικών Κανονισμών και τής Μοναστηριακής περιουσίας στίς Παραδουνάβιες Ηγεμονίες.Το πατριαρχοκεντρικό πρότυπο διακυβερνήσεως που πρότεινε ό Γρηγόριος ΣΤ΄ διέσωζε τό ενιαίο καί αδιαίρετο τής εθναρχικής εξουσίας του πατριάρχου καί επομένως τών Προνομίων Εκκλησίας καί Γένους
description: The historical reestablishment of the Ecumenical Patriarch Gregorius VIth personality was based on a systematical quotation of his biographical and ergographical backround.Several other issues have been examined as well:the Great Church's ecumenical policy above any national,racial or social class discrimination,the emergence of Balkan nationalities of the 19th century,the situation within the Orthodox Community and the relations between Orthodox and Heterodox Christians.Also the Great Powers'rivalries,the Ottoman Reforms,the ecclesiastical questions of Ionian Islands',Greece's,Boulgaria's,Rumania's Churches',the matter of National Regulations revision and the problem of the dedicated monasteries'properties in Rumania.A patriarh-centered model of governing suggested by Gregorius VIth was intended to preserve the patriarch's dignity and authority as an Ethnarch,and therefore to maintain the Privilegies of the Orthodox Church and Nation
Polytrichum sphaerothecium Mull. Hal.
Creators: name: Zhao, Wei
name: Wang, Zhaoming
name: Zheng, Lina
name: Naren, Gaowa
name: He, Qiang
name: Han, Wei
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Polytrichales
Polytrichaceae
Polytrichum
Polytrichum sphaerothecium

description: Polytrichum sphaerothecium (Besch.) Müll. Hal.
Materials
Type status: Other material. Occurrence: catalogNumber: PE 2155741; recordNumber: 12035; recordedBy: Q. He; occurrenceID: 6BB4EF1B-4969-55F7-A776-DD969F0109CE; Taxon: order: Polytrichales; family: Polytrichaceae; genus: Polytrichum; Location: island: Asia; country: China; countryCode: China / CN; stateProvince: Tibet; county: Dingri; municipality: Qudang; locality: Cuoqu; verbatimLocality: Shigatse; verbatimElevation: 3796 m; verbatimCoordinates: 28 º 05 ′ 23 " N, 87 º 21 ′ 53 " E; Identification: identifiedBy: Y. Jia and Q. He; Event: year: 2018; month: 6; day: 21; habitat: On the forest floor; Record Level: language: cn
Description
Plants small, brownish-green, slightly glossy, in dense aggregated tufts (Fig. 3 a). Stems erect, 1-3 cm high. Leaves slightly incurved, usually appressed on stems when dry, erect-patent when moist, 3-6 × 1.2-1.5 mm, ovate-lanceolate to oblong-lanceolate, acuminate or cucullate at apex, sheathing indistinct (Fig. 3 f, g); costa excurrent into a short filiform apex, smooth or a few teeth on back near apex; leaf margins involute, covering ventral lamellae; upper leaf cells quadrate or oblate, 12-15 μm wide, sometimes the length 1-2 times longer than width; median cells rectangular, 18-40 × 8-10 μm; basal cells quadrate to narrowly rectangular, bordered by narrow, hyaline cells; ventral lamellae in ca. 30 rows, 6-11 cells high; marginal cells of lamellae pyriform, thick-walled. Dioecious. Male plants similar to the female ones, occasionally with new innovations. Perigonial leaves ca. 3 mm long, with oblong sheathing base. Perichaetial leaves up to 9 mm long, from an ovate sheathing base, suddenly narrowing to a lanceolate lamina (Fig. 3 e). Setae 5-9 mm long, pendulous; capsules nearly spherical, horizontal to cernuous, with distinct discoid apophyses (Fig. 3 b); exothecial cells hexagonal to triangular, without mammillae; opercula with short beaks; peristome teeth often more than 32, triangular, acuminate, ca. 30 μm long (Fig. 3 d), greyish-yellow, membrane nearly as long as the peristome teeth. Calyptrae triangular, 3-4 mm long, densely covered with long hairs (Fig. 3 c).
Distribution
China (Tibet [present study], Jilin), Korea, Japan and the Aleutian Islands (Wu and Jia 2004).
description: Published as part of Zhao, Wei, Wang, Zhaoming, Zheng, Lina, Naren, Gaowa, He, Qiang & Han, Wei, 2024, A step forward in botanical exploration with three new Polytrichaceae records from Tibet, China, pp. e 133971 in Biodiversity Data Journal 12 on page e133971, DOI: 10.3897/BDJ.12.e133971
Interacting cosmic fluids in power-law Friedmann-Robertson-Walker cosmological models
Creators: name: Cataldo, Mauricio
name: Mella, Patricio
name: Minning, Paul
name: Saavedra, Joel
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide a detailed description for power--law scaling Friedmann-Robertson-Walker cosmological scenarios dominated by two interacting perfect fluid components during the expansion. As a consequence of the mutual interaction between the two fluids, neither component is conserved separately and the energy densities are proportional to $1/t^{2}$. It is shown that in flat FRW cosmological models there can exist interacting superpositions of two perfect fluids (each of them having a positive energy density) which accelerate the expansion of the universe. In this family there also exist flat power law cosmological scenarios where one of the fluids may have a ``cosmological constant" or "vacuum energy" equation of state ($p =-ρ$) interacting with the other component; this scenario exactly mimics the behavior of the standard flat Friedmann solution for a single fluid with a barotropic equation of state. These possibilities of combining interacting perfect fluids do not exist for the non-interacting mixtures of two perfect cosmic fluids, where the general solution for the scale factor is not described by power--law expressions and has a more complicated behavior. In this study is considered also the associated single fluid model interpretation for the interaction between two fluids.
description: 10 pages. Accepted for publication in Physics Letters B
Accelerating Sparse Approximate Matrix Multiplication on GPUs
Creators: name: Liu, Xiaoyan
name: Liu, Yi
name: Dun, Ming
name: Yin, Bohong
name: Yang, Hailong
name: Luan, Zhongzhi
name: Qian, Depei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Although the matrix multiplication plays a vital role in computational linear algebra, there are few efficient solutions for matrix multiplication of the near-sparse matrices. The Sparse Approximate Matrix Multiply (SpAMM) is one of the algorithms to fill the performance gap neglected by traditional optimizations for dense/sparse matrix multiplication. However, existing SpAMM algorithms fail to exploit the performance potential of GPUs for acceleration. In this paper, we present cuSpAMM, the first parallel SpAMM algorithm optimized for multiple GPUs. Several performance optimizations have been proposed, including algorithm re-design to adapt to the thread parallelism, blocking strategies for memory access optimization, and the acceleration with the tensor core. In addition, we scale cuSpAMM to run on multiple GPUs with an effective load balance scheme. We evaluate cuSpAMM on both synthesized and real-world datasets on multiple GPUs. The experiment results show that cuSpAMM achieves significant performance speedup compared to vendor optimized cuBLAS and cuSPARSE libraries.
Mid-Infrared Imaging of the Herbig Ae Star AB Aurigae: Extended Emission on Several Scales
Creators: name: Marinas, N.
name: Telesco, C. M.
name: Fisher, R. S.
name: Packham, C.
name: Radomski, J. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high sensitivity sub-arcsecond resolution images of the Herbig Ae star AB Aurigae at 11.6 and 18.5 microns taken with Michelle on Gemini North. Bright extended dust emission close to the star is resolved at both wavelengths, with quadratically subtracted FWHM of 17+/-4 AU at 11.6 microns and 22+/-5 AU at 18.5 microns. Additional, fainter emission is detected out to a radius of 280 AU at 11.6 microns and 350 AU at 18.5 microns down to the sensitivity limit of the observations. The latter value is identical to the measured size of the millimeter-continuum disk, but much smaller than the CO disk. Assuming moderately absorbing material, we find that larger particles (~ 1 microns) dominate the mid-IR emission in the inner (< 100 AU) regions of the disk, and smaller particles (< 0.3 microns) dominate in the outer regions of the disk. A model of a nearly face-on passive flared disk with an inner rim accounts well for our observations.
Raumlektüren: Von »space« zu »place«
Creators: name: Horak, Roman
name: Mattl, Siegfried
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2001

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 12 Nr. 3 (2001): Architekturen
Atrichum crispulum Besch.
Creators: name: Zhao, Wei
name: Wang, Zhaoming
name: Zheng, Lina
name: Naren, Gaowa
name: He, Qiang
name: Han, Wei
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Polytrichales
Polytrichaceae
Atrichum
Atrichum crispulum

description: Atrichum crispulum Schimp. ex Besch.
Distribution
China, North Korea, Japan and Thailand (Wu and Jia 2004).
description: Published as part of Zhao, Wei, Wang, Zhaoming, Zheng, Lina, Naren, Gaowa, He, Qiang & Han, Wei, 2024, A step forward in botanical exploration with three new Polytrichaceae records from Tibet, China, pp. e 133971 in Biodiversity Data Journal 12 on page e133971, DOI: 10.3897/BDJ.12.e133971
Atrichum rhystophyllum Paris 1900
Creators: name: Zhao, Wei
name: Wang, Zhaoming
name: Zheng, Lina
name: Naren, Gaowa
name: He, Qiang
name: Han, Wei
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Bryopsida
Polytrichales
Polytrichaceae
Atrichum
Atrichum rhystophyllum

description: Atrichum rhystophyllum (Müll. Hal.) Paris
Distribution
China, North Korea and Japan (Wu and Jia 2004).
description: Published as part of Zhao, Wei, Wang, Zhaoming, Zheng, Lina, Naren, Gaowa, He, Qiang & Han, Wei, 2024, A step forward in botanical exploration with three new Polytrichaceae records from Tibet, China, pp. e 133971 in Biodiversity Data Journal 12 on page e133971, DOI: 10.3897/BDJ.12.e133971
The role of resonant plasma instabilities in the evolution of blazar induced pair beams
Creators: name: Perry, Roy
name: Lyubarsky, Yuri
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The fate of relativistic pair beams produced in the intergalactic medium by very high energy emission from blazars remains controversial in the literature. The possible role of resonance beam plasma instability has been studied both analytically and numerically but no consensus has been reached. In this paper, we thoroughly analyze the development of this type of instability. This analysis takes into account that a highly relativistic beam loses energy only due to interactions with the plasma waves propagating within the opening angle of the beam (we call them parallel waves), whereas excitation of oblique waves results merely in an angular spreading of the beam, which reduces the instability growth rate. For parallel waves, the growth rate is a few times larger than for oblique ones, so they grow faster than oblique waves and drain energy from the beam before it expands. However, the specific property of extragalactic beams is that they are extraordinarily narrow; the opening angle is only $Δθ\sim 10^{-6}-10^{-5}$. In this case, the width of the resonance for parallel waves, $\proptoΔθ^2$, is too small for them to grow in realistic conditions. We perform both analytical estimates and numerical simulations in the quasilinear regime. These show that for extragalactic beams, the growth of the waves is incapable of taking a significant portion of the beam's energy. This type of instability could at best lead to an expansion of the beam by some factor but the beam's energy remains nearly intact.
description: To be published in MNRAS
Transcription of the narration of Reel #5 (collection LA 256)
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: hup

description: Audio files VP-080216-05 and VP-080216-06: transcription of VP-161215-01 (narration of Reel #5 from the LA 256 collection at SCOIL, one of six reels of 8mm film created by Verdena in the 1960s, featuring scenes of everyday life around Hoopa Valley as well as Brush Dances). Edited files (51 seconds of preamble by J. Spence deleted in order to align video) from 8:43 to 10:29 (VP-080216-05) and 10:29 to 10:34 (VP-080216-06). Due to re-numbering, Reel #5 has been assigned the CLA item number LA 256.044.
editorial: tele visionen
Creators: name: Bernold, Monika
name: Szely, Sylvia
Publisher: name: Österreichische Zeitschrift für Geschichtswissenschaften
Year: 2001

description: Österreichische Zeitschrift für Geschichtswissenschaften, Bd. 12 Nr. 4 (2001): Tele Visionen - Historiografien des Fernsehens
Transition from participant to spectator fragmentation in Au+Au reaction between 60 AMeV and 150 AMeV
Creators: name: Zbiri, K.
name: LeFèvre, A.
name: Aichelin, J.
name: Łukasik, J.
name: Reisdorf, W.
name: Gulminelli, F.
name: Lynen, U.
name: Müller, W. F. J.
name: Orth, H.
name: Schwarz, C.
name: Sfienti, C.
name: Trautmann, W.
name: Turzó, K.
name: Zwiegliński, B.
name: Auger, G.
name: Charvet, J. L.
name: Chbihi, A.
name: Dayras, R.
name: Durand, D.
name: Frankland, J. D.
name: Legrain, R.
name: Neindre, N. Le
name: Lopez, O.
name: Nalpas, L.
name: Parlog, M.
name: Rivet, M. F.
name: Rosato, E.
name: Vient, E.
name: Vigilante, M.
name: Volant, C.
name: Wieleczko, J. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using the quantum molecular dynamics approach, we analyze the results of the recent INDRA Au+Au experiments at GSI in the energy range between 60 AMeV and 150 AMeV. It turns out that in this energy region the transition toward a participant-spectator scenario takes place. The large Au+Au system displays in the simulations as in the experiment simultaneously dynamical and statistical behavior which we analyze in detail: The composition of fragments close to midrapidity follows statistical laws and the system shows bi-modality, i.e. a sudden transition between different fragmentation pattern as a function of the centrality as expected for a phase transition. The fragment spectra at small and large rapidities, on the other hand, are determined by dynamics and the system as a whole does not come to equilibrium, an observation which is confirmed by FOPI experiments for the same system.
description: published version