cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Διαχείριση διακινδύνευσης κατολισθήσεων
Creators: name: Σακουμπέντα, Ελένη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Διακινδύνευση
Επικινδυνότητα
Τρωτότητα
Κατολισθήσεις
Διαχείριση
Αξιοπιστία
Risk
Hazard
Vulnerability
Landslides
Management
Reliability

description: Η παρούσα εργασία αναπτύσσει τη διεργασία της Διαχείρισης ΔιακινδύνευσηςΚατολισθήσεων αναλύοντας την στις επιμέρους συνιστώσες της και περιγράφοντας έναπρος ένα τα βήματά της. Στο πλαίσιο της ανάπτυξης αυτής αποσαφηνίζονται βασικοί όροιδιακινδύνευσης, περιγράφονται τα βασικά χαρακτηριστικά των κατολισθήσεων καικαταγράφονται οι αβεβαιότητες και τα διάφορα επίπεδα ανάλυσης στη μελέτησταθεροποίησής τους. Παρέχονται κατευθυντήριες οδηγίες για μεθόδους υπολογισμούστοιχείων της ανάλυσης και δίνονται πίνακες για την ποιοτική εκτίμησή τους όταν ηπσοσοτικοποίησή τους δεν είναι εφικτή. Τέλος, γίνεται περιορισμένης μορφής ανάλυσηδιακινδύνευσης σε κατολίσθηση πάνω στην χάραξη της Εγνατίας οδού για δύο εναλλακτικάσενάρια μέτρων σταθεροποίησης. Η ανάλυση καταλήγει στην πιθανότητα αστοχίας και μεβάση συγκεκριμένες παραδοχές, υπολογίζεται το συνολικό κόστος κάθε εναλλακτικούσεναρίου. Τα αποτελέσματα της ανάλυσης σχολιάζονται σε σχέση με τα ήδη εγκεκριμένακαι υπό κατασκευή έργα σταθεροποίησης.
description: The present thesis deals with the process of the Landslide Risk Management. It analyses theprocess into its components and describes in more detail its various stages. In theframework of the discussion, it clarifies the fundamental terms in the risk domain, presentsthe basic features of landslides and reports the uncertainties and design levels involved in alandslide stabilisation design. Furthermore, it provides general guidance on methods forcalculating elements of the risk analysis and tables for qualitative estimates of theseelements when a quantitative estimate is not feasible. Finally, it includes a preliminary riskanalysis carried out for a landslide identified on Egnatia motorway alignment. The analysisresults in the probability of failure and, based on particular assumptions, in the total cost oftwo scenarios of stabilization measures. The results of the analysis are commented withrespect to the already approved stabilisation measures which are currently underconstruction.
ESAME DELL'INFLUENZA DEL PROFILO DEI POLI DI UN SINCROTRONE DA 1 BEV SUL COSTO  DELLA MACCHINA  E SUL COSTO DELL'ALIMENTAZIONE
Creators: name: G. SACERDOTI
Publisher: name: INFN Open Access Repository
Year: 1953

description: Per una certa forma di polo, quando ci si proponga di non superare un certo valore del campo magnetico nel ferro, onde evitare la saturazione, e' determinato il valore massimo che il campo magnetico puo' assumere nell'intraferro. Da tale campo magnetico massimo ottenibile nella gap del sincrotrone, si risale, nota la energia a cui si vuole accelerare la particella, al raggio del sincrotrone. In funzione quindi della forma del polo, in questa nota ricercheremo principalmente come varii il costo del sincrotrone e della sua alimentazione. Ci riserviamo di completare il quadro dei costi, quando si avranno dati indicativi sul costo dei basamenti e delle strutture di supporto del sincrotrone in funzione delle dimensioni del sincrotrone stesso.
CIZSL++: Creativity Inspired Generative Zero-Shot Learning
Creators: name: Elhoseiny, Mohamed
name: Yi, Kai
name: Elfeki, Mohamed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Zero-shot learning (ZSL) aims at understanding unseen categories with no training examples from class-level descriptions. To improve the discriminative power of ZSL, we model the visual learning process of unseen categories with inspiration from the psychology of human creativity for producing novel art. First, we propose CIZSL-v1 as a creativity inspired model for generative ZSL. We relate ZSL to human creativity by observing that ZSL is about recognizing the unseen, and creativity is about creating a likable unseen. We introduce a learning signal inspired by creativity literature that explores the unseen space with hallucinated class-descriptions and encourages careful deviation of their visual feature generations from seen classes while allowing knowledge transfer from seen to unseen classes. Second, CIZSL-v2 is proposed as an improved version of CIZSL-v1 for generative zero-shot learning. CIZSL-v2 consists of an investigation of additional inductive losses for unseen classes along with a semantic guided discriminator. Empirically, we show consistently that CIZSL losses can improve generative ZSL models on the challenging task of generalized ZSL from a noisy text on CUB and NABirds datasets. We also show the advantage of our approach to Attribute-based ZSL on AwA2, aPY, and SUN datasets. We also show that CIZSL-v2 has improved performance compared to CIZSL-v1.
description: This paper is an extended version of a paper published on the International Conference on Computer Vision (ICCV), held in Seoul, Republic of Korea, October 27-Nov 2nd, 2019 CIZSL-v2 code is available here https://github.com/Vision-CAIR/CIZSLv2. arXiv admin note: substantial text overlap with arXiv:1904.01109
SCIENTIFIC APPROACHES AND PRINCIPLES OF ENTREPRENEURIAL COMPETENCE FORMATION IN PHYSICS LESSONS
Creators: name: Mukha, A.
Publisher: name: The Scientific Heritage
Year: 2021
Subjects: scientific approaches
scientific principles
entrepreneurial competence
problem approach
problem situations
axiological approach
integration approach
system-activity approach
personality-oriented approach
competence approach
acmeological approache.

description: The article deals with the formation of entrepreneurial competence of students in physics lessons. It focuses on the structure of entrepreneurial competence. The main attention is focused on highlighting the potential of scientific approaches and principles to the formation of entrepreneurial competence. The expediency of applying axiological, problem-based, system-activity, competence-based, personality-oriented and acmeological approaches as an important methodological basis for the formation of entrepreneurial competence in physics lessons is substantiated.
Optimal Prefix Codes for Infinite Alphabets with Nonlinear Costs
Creators: name: Baer, Michael B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Information Theory (cs.IT)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: E.4; H.1.1

description: Let $P = \{p(i)\}$ be a measure of strictly positive probabilities on the set of nonnegative integers. Although the countable number of inputs prevents usage of the Huffman algorithm, there are nontrivial $P$ for which known methods find a source code that is optimal in the sense of minimizing expected codeword length. For some applications, however, a source code should instead minimize one of a family of nonlinear objective functions, $β$-exponential means, those of the form $\log_a \sum_i p(i) a^{n(i)}$, where $n(i)$ is the length of the $i$th codeword and $a$ is a positive constant. Applications of such minimizations include a novel problem of maximizing the chance of message receipt in single-shot communications ($a<1$) and a previously known problem of minimizing the chance of buffer overflow in a queueing system ($a>1$). This paper introduces methods for finding codes optimal for such exponential means. One method applies to geometric distributions, while another applies to distributions with lighter tails. The latter algorithm is applied to Poisson distributions and both are extended to alphabetic codes, as well as to minimizing maximum pointwise redundancy. The aforementioned application of minimizing the chance of buffer overflow is also considered.
description: 14 pages, 6 figures, accepted to IEEE Trans. Inform. Theory
Excalibur: A Non-Parametric, Hierarchical Wavelength-Calibration Method for a Precision Spectrograph
Creators: name: Zhao, L. L.
name: Hogg, D. W.
name: Bedell, M.
name: Fischer, D. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Excalibur is a non-parametric, hierarchical framework for precision wavelength-calibration of spectrographs. It is designed with the needs of extreme-precision radial velocity (EPRV) in mind, which require that instruments be calibrated or stabilized to better than $10^{-4}$ pixels. Instruments vary along only a few dominant degrees of freedom, especially EPRV instruments that feature highly stabilized optical systems and detectors. Excalibur takes advantage of this property by using all calibration data to construct a low-dimensional representation of all accessible calibration states for an instrument. Excalibur also takes advantage of laser frequency combs or etalons, which generate a dense set of stable calibration points. This density permits the use of a non-parametric wavelength solution that can adapt to any instrument or detector oddities better than parametric models, such as a polynomial. We demonstrate the success of this method with data from the EXtreme PREcision Spectrograph (EXPRES), which uses a laser frequency comb. When wavelengths are assigned to laser comb lines using excalibur, the RMS of the residuals is about five times lower than wavelengths assigned using polynomial fits to individual exposures. Radial-velocity measurements of HD 34411 showed a reduction in RMS scatter over a 10-month time baseline from $1.17$ to $1.05\, m\,s^{-1}$.
description: 16 pages, 10 figures, presented here following first referee report
Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
Creators: name: Ferrari, G.
name: Poli, N.
name: Sorrentino, F.
name: Tino, G. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the observation of Bloch oscillations on the unprecedented time scale of severalseconds. The experiment is carried out with ultra-cold bosonic strontium-88 loaded into a vertical optical standing wave. The negligible atom-atom elastic cross section and the absence of spin makes $^{88}$Sr an almost ideal Bose gas insensitive to typical mechanisms of decoherence due to thermalization and to external stray fields. The small size enables precision measurements of forces at micrometer scale. This is a challenge in physics for studies of surfaces, Casimir effects, and searches for deviations from Newtonian gravity predicted by theories beyond the standard model.
Η συνεισφορά του Συμβουλίου Ασφαλείας των Ηνωμένων Εθνών στο Διεθνές Ανθρωπιστικό Δίκαιο
Creators: name: Βρύζα, Αθηνά Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Συμβούλιο Ασφαλείας
Διεθνές ανθρωπιστικό δίκαιο
Security Council
International Humanitarian Law

description: Μετά το τέλος του Ψυχρού Πολέμου το Συμβούλιο Ασφαλείας με μια σειρά από ψηφίσματά του συνέβαλε στην ανάπτυξη και προώθηση του Διεθνούς Ανθρωπιστικού Δικαίου.
description: After the end of the Cold War the Security Council of the UIV, contributed to the development and evolution of the international humanitarian law
An Ultra-deep Multi-band VLA Survey of the Faint Radio Sky (COSMOS-XS): Source Catalog and Number Counts
Creators: name: Van der Vlugt, D.
name: Algera, H. S. B.
name: Hodge, J. A.
name: Novak, M.
name: Radcliffe, J. F.
name: Riechers, D. A.
name: Röttgering, H.
name: Smolčić, V.
name: Walter, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present ultra-deep, matched-resolution Karl G. Jansky Very Large Array (VLA) observations at 10 and $3$ GHz in the COSMOS field: the COSMOS-XS survey. The final 10 and $3$ GHz images cover $\sim16\rm{arcmin}^{2}$ and $\sim180\rm{arcmin}^{2}$ and reach median rms values of $0.41μ\rm{Jy\,beam}^{-1}$ and $0.53μ\rm{Jy\,beam}^{-1}$, respectively. Both images have an angular resolution of $\sim 2.0''$. To fully account for the spectral shape and resolution variations across the broad bands, we image all data with a multi-scale, multi-frequency synthesis algorithm. We present source catalogs for the 10 and $3$ GHz image with 91 and 1498 sources, respectively, above a peak brightness threshold of $5σ$. We present source counts with completeness corrections included that are computed via Monte Carlo simulations. Our corrected radio counts at $3$ GHz with direct detections down to $\sim2.8μ$Jy are consistent within the uncertainties with other results at 3 and 1.4 GHz, but extend to fainter flux densities than previous direct detections. The ultra-faint $3$ GHz number counts are found to exceed the counts predicted by the semi-empirical radio sky simulations developed in the framework of the SKA Simulated Skies project, consistent with previous P(D) analyses. Our measured source counts suggest a steeper luminosity function evolution for these faint star-forming sources. The semi-empirical Tiered Radio Extragalactic Continuum Simulation (T-RECS) predicts this steeper evolution and is in better agreement with our results. The $10$ GHz radio number counts also agree with the counts predicted by the T-RECS simulation within the expected variations from cosmic variance. In summary, the multi-band, matched-resolution COSMOS-XS survey in the well-studied COSMOS field provides a high-resolution view of the ultra-faint radio sky that can help guide next generation radio facilities.
description: Resubmitted to ApJ after incorporating suggestions from the referee; 20 pages, 17 figures. This is a companion paper to Algera et al., on arXiv today
Από τη Μέση Ανατολή στη Θεσσαλονίκη, πρόσφυγες, μετανάστες, φοιτητές
Creators: name: Μενελαΐδου, Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Παλαιστίνη
Παλαιστινιακή παροικία
Παλαιστίνιος
Ξένος
Αλλος
Γραφειοκρατία, Φιλοξενία
Palestine
Palestine community
Palestinian
Alien strangers
Others
Bureaucracy, Hospitality

description: Επιτόια έρευνα για τους Παλαιστίνιους που ζούν στη Θεσσαλονίκη, παρουσίαση της παλαιστινιακής παροικίας και των παλαιστίνιων φοιτητών. Σχέσεις με την εδώ κοινωνία και προβλήματα με τη γραφειοκρατία. Οι παλαιστίνιοι σαν ιδιαίτερη κοινότητα στη Θεσσαλονίκη, μια κοινότητα διασποράς και φοιτητών. Διαφοροποίησή της από τους οικονομικούς μετανάστες
description: The image of "other" in the Greek society.Fieldwork with Palestinian people who live in Thessaloniki.Presentation of the Palestinian community and the Palestinian Students and their relationship with the Greek society and the problems caused by the bureaucracy. The Palestinians as a community of diaspora and the community of students, a different one from the communities of classical economical emigrants
The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection
Creators: name: Althaus, L. G.
name: Serenelli, A. M.
name: Panei, J. A.
name: Corsico, A. H.
name: Garcia-Berro, E.
name: Scoccola, C. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This paper is designed to explore the formation and evolution of hydrogen-deficient post-AGB white dwarfs. To this end, we compute the complete evolution of an initially 2.7 M_sun star from the zero-age main sequence through the thermally pulsing and mass-loss phases to the white dwarf stage. Particular attention is given to the chemical abundance changes during the whole evolution. A time-dependent scheme for the simultaneous treatment of abundance changes caused by nuclear reactions, diffusive overshooting, salt fingers and convection is considered. We employed the double-diffusive mixing-length theory of convection for fluids with composition gradients (Grossman & Taam 1996). The study can therefore be considered as a test of its performance in low-mass stars. Also, time-dependent element diffusion for multicomponent gases is taken into account during the white dwarf evolution. The evolutionary stages corresponding to the last helium thermal pulse on the early white-dwarf cooling branch and the following born-again episode are carefully explored. Relevant aspects for PG1159 stars and DB white dwarf evolution are studied in the frame of these new evolutionary models that take into account the history of the white dwarf progenitor. The scope of the calculations is extended to the domain of the helium-rich, carbon-contaminated DQ white dwarfs with the aim of exploring the plausibility of the evolutionary connection PG1159-DB-DQ. In this regard, the implications for the double-layered chemical structure in pulsating DB white dwarfs is investigated. Another aspect of the investigation concerned the consequences of mass-loss episodes during the PG1159 stage for the chemical stratification of the outer layer of DB and DQ white dwarfs.
description: 20 pages, 15 figures. Accepted by Astronomy & Astrophysics
Compactness theorems of gradient Ricci solitons
Creators: name: Zhang, Xi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58G30;53C20

description: In this paper, we prove the compactness theorem for gradient Ricci solitons. Let $(M_α, g_α)$ be a sequence of compact gradient Ricci solitons of dimension $n\geq 4$, whose curvatures have uniformly bounded $L^{\frac{n}{2}}$ norms, whose Ricci curvatures are uniformly bounded from below with uniformly lower bounded volume and with uniformly upper bounded diameter, then there must exists a subsequence $(M_α, g_α)$ converging to a compact orbifold $(M_{\infty}, g_{\infty})$ with finitly many isolated singularities, where $g_{\infty}$ is a gradient Ricci soliton metric in an orbifold sense.
description: 21pages
Stay Connected, Leave no Trace: Enhancing Security and Privacy in WiFi via Obfuscating Radiometric Fingerprints
Creators: name: Abanto-Leon, Luis F.
name: Baeuml, Andreas
name: Hong, Gek
name: Sim
name: Hollick, Matthias
name: Asadi, Arash
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computers and Society (cs.CY)
subject: Networking and Internet Architecture (cs.NI)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The intrinsic hardware imperfection of WiFi chipsets manifests itself in the transmitted signal, leading to a unique radiometric fingerprint. This fingerprint can be used as an additional means of authentication to enhance security. In fact, recent works propose practical fingerprinting solutions that can be readily implemented in commercial-off-the-shelf devices. In this paper, we prove analytically and experimentally that these solutions are highly vulnerable to impersonation attacks. We also demonstrate that such a unique device-based signature can be abused to violate privacy by tracking the user device, and, as of today, users do not have any means to prevent such privacy attacks other than turning off the device. We propose RF-Veil, a radiometric fingerprinting solution that not only is robust against impersonation attacks but also protects user privacy by obfuscating the radiometric fingerprint of the transmitter for non-legitimate receivers. Specifically, we introduce a randomized pattern of phase errors to the transmitted signal such that only the intended receiver can extract the original fingerprint of the transmitter. In a series of experiments and analyses, we expose the vulnerability of adopting naive randomization to statistical attacks and introduce countermeasures. Finally, we show the efficacy of RF-Veil experimentally in protecting user privacy and enhancing security. More importantly, our proposed solution allows communicating with other devices, which do not employ RF-Veil.
description: ACM Sigmetrics 2021 / In Proc. ACM Meas. Anal. Comput. Syst., Vol. 4, 3, Article 44 (December 2020)
Characteristic Lie Algebra and Classification of Semi-Discrete Models
Creators: name: Habibullin, Ismagil
name: Pekcan, Asli
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Characteristic Lie algebras of semi-discrete chains are studied. The attempt to adopt this notion to the classification of Darboux integrable chains has been undertaken.
description: 33 pages, corrected typos, submitted to the Proceedings of the workshop "Nonlinear Physics: Theory and Experiment IV", Theoretical Mathematical Physics
TRANSGRESSIVE SEQUENCES ON FORELAND MARGINS: A CASE STUDY OF THE NEOGENE CENTRAL GUADALQUIVIR BASIN, SOUTHERN SPAIN
Creators: name: GABRIEL PENDÓN, J.
name: RUIZ, FRANCISCO
name: ABAD, MANUEL
name: LUZ GONZÁLEZ-REGALADO, M.
name: I. BACETA, JUAN
name: TOSQUELLA, JOSEP
Publisher: name: Università degli Studi di Milano
Year: 2004

description: The Guadalquivir foreland basin, located between the Iberian basement northward and the Betic orogen to the South, represents the western sector of the earlier foredeep basin of the Betic Cordillera. Along the northern foreland margin, the sedimentary fill of this basin includes a Tortonian Basal Transgressive Complex (BTC), composed of five internal sequences bounded by transgressive surfaces. Two main parts are distinguished within each sequence: the lower transgressive lag deposits, and the upper stillstand/prograding sediments. Three facies associations were distinguished within this stratigraphic succession along the central sector of this basin margin: unfossiliferous conglomerates and coarse-grained sands (A), fossiliferous conglomerates and coarse-grained sands (B), and yellow medium-coarse-grained fossiliferous sands (C). A fourth facies association (D: blue silty marlstones and shales) overlies the BTC. Deposits of alluvial sediments (facies association A) and shallow-marine/foreshore sediments (facies association C), were recurrently interrupted by transgressive pulses (facies associations B and C). Every pulse is recorded by an erosional, cemented sandy-conglomerate bar with bivalves (Ostreidae, Isognomon), balanids, gastropods and other marine bioclasts; or their transgressive equivalents. The lateral facies changes in each individual sequence of the BTC are related to: (1) the influence on the northern foreland margin of the tectonic activity of the southern orogenic margin; (2) the palaeorelief formed by irregularities of the substrate which controls the sediment dispersal; and (3) the evolution stages of the sedimentary systems.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
PALAEOECOLOGIC AND PALAEOBIOGEOGRAPHIC CHARACTER OF MIDDLE PLIOCENE NON-MARINE MOLLUSC FAUNAS FROM NORTH-WESTERN ITALY
Creators: name: ESU, DANIELA
name: CIANGHEROTTI, ANTONELLA
Publisher: name: Università degli Studi di Milano
Year: 2004

description: Significant new records of rich Middle Pliocene nonmarine mollusc assemblages from the Piedmont basin (North-western Italy) have led to an update of the systematic position of some taxa known since the end of the 19th century. The recorded molluscs come from deposits belonging to the San Martino unit in the "Villafranchian type-area" (Villafranca d’Asti) and to Cuneo and Alessandria districts. Vertebrate remains referred to the Middle Pliocene Triversa Faunal Unit (Mammal Neogene zone MN16a) are often associated with molluscs. A detailed palaeoecologic and palaeobiogeographic picture of the Middle Pliocene aquatic and terrestrial mollusc faunas is outlined. The assemblages are characterised by a high degree of species diversity and by the dominance of land prosobranchs and pulmonates. The palaeoecologic character is related to the different sedimentary facies recognised in the lithostratigraphic units: hygrophilous land faunas in paleosols and dominant aquatic taxa in lacustrine-palustrine sediments. Thermophilous swampy and forest taxa point to warm-temperate and humid climate conditions. A high number of extinct taxa and a high rate of endemism are underlined. A Mio-Pliocene Central-western European origin is noticed for many species. In the Middle Pliocene a spreading of some terrestrial species took place from North-western Italy towards Central Italy. Some new extinct taxa, belonging to the families Aciculidae (Renea sp. 1) and Clausiliidae [Monoptychia (subgen. n.) sp. 1; Neostyriacasp. 1; Fusulus (Fusulus) sp. 1], are identified.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
LARGE MAMMAL TURNOVER AND DIVERSITY FROM THE PLIOCENE TO THE PLEISTOCENE IN ITALIAN PENINSULA
Creators: name: AZANZA, BEATRIZ
name: RITA PALOMBO, MARIA
name: TERESA ALBERDI, MARIA
Publisher: name: Università degli Studi di Milano
Year: 2004

description: Patterns of mammalian species turnover, richness, and faunal composition are assessed on the basis of relative sampling quality and correlated with climatic changes. The most important faunal renewals took place at the early to middle Villafranchian, middle to late Villafranchian, and Early to Middle Pleistocene transitions. The turnover phase at Triversa to Montopoli FU transition corresponds to the Middle Pliocene climate worsening, and can be considered a starting point for the dispersal phases that occurred during the Middle and Late Pliocene. Around 1.9-1.7 Ma (Olivola and Tasso FUs) both a clear increase in diversity as well as a turnover pulse can be detected. The so-called "wolfevent" has to be regarded not only as a dispersal phase but also as a true turnover pulse that is related to the climatic changes occurring at the end of Pliocene. Finally, the transition from Early to Middle Pleistocene faunas represents a major community reorganization (dispersal followed by turnover phase) that shows a significant and progressive rejuvenation coincident with the onset of 100 ka climate cyclicity and vegetation changes related to the climate worsening. The results obtained support the argument that climatic changes are a forcing factor in the first appearances (number of first appearances (Nf ) and rate quotient of first appearance (RQf), including migrations) of mammal taxa.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
Συνδυασμένη μελέτη θερμοηλεκτρικών υλικών-χαλκογενιδίων
Creators: name: Γεωργακάκη, Δήμητρα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Θερμοηλεκτρικά φαινόμενα
Εμπέδηση
Παθητικά κυκλώματα
Θερμικά τετράπολα
Θερμική αγωγιμότητα
Συντελεστής Seebeck
Thermoelectric material
Passive rc circuit
Thermal quadrupole
Fitting
Models
Thermal impedance

description: Στην παρούσα εργασία αναπτύχθηκαν και συγκρίθηκαν δύο υπολογιστικά μοντέλαπου προσομοιώνουν το μέτρο της μιγαδικής εμπέδησης σε συχνοτικό επίπεδο τουθερμοηλεκτρικού υλικού Bi2Te3.Στο πρώτο κεφάλαιο γίνεται μια αναφορά στη φύση των θερμοηλεκτρικώνφαινομένων, στα υλικά που χρησιμοποιούνται σε θερμοηλεκτρικές εφαρμογές καιστην επιλογή του υλικού Bi2Te3 ως δείγμα εξέτασης, με συντελεστή θερμοηλεκτρικήςαπόδοσης ΖΤ~1 σε θερμοκρασία δωματίου.Στα επόμενα δύο κεφάλαια αναπτύσσονται οι θεωρίες των ισοδύναμων παθητικώνRC κυκλωμάτων και των θερμικών τετραπόλων που θα χρησιμοποιηθούν για τηνπροσομοίωση των πειραματικών φασμάτων του Bi2Te3. Αναφέρονται επίσης ταμεγέθη που προσδιορίζει η κάθε μέθοδος, τόσο αυτά που αποτελούν πρωτογενώςενδογενείς ιδιότητες του υλικού όσο και αυτά που υπολογίζονται με έμμεσο τρόπο(π.χ. με χρήση εξισώσεων).Λόγω της πολυπλοκότητας του μοντέλου των θερμικών τετραπόλων, στο τέταρτοκεφάλαιο γίνεται η κατασκευή των μοντέλων με τιμές των θερμικών και ηλεκτρικώνπαραμέτρων που δίνονται από τη βιβλιογραφία και διερευνάται η επίδραση καθεμίαςπαραμέτρου ξεχωριστά στη συνολική ηλεκτροθερμική απόκριση του υλικού.Στο πέμπτο κεφάλαιο γίνεται η προσομοίωση των πειραματικών δεδομένων μιαςδιάταξης ΤΕ module που αποτελείται από 62 ζεύγη ημιαγωγικών blocks Bi2Te3 καθώςκαι ενός σκέτου block Bi2Te3, και με τα δύο μοντέλα.Τέλος παρατίθενται τα συμπεράσματα που προκύπτουν από τη συγκριτική μελέτητων δύο μοντέλων και σχολιάζονται τα όρια εφαρμογής τους.
description: In this paper two different computational models have been developed and studied. These models simulate the magnitude of the impedance in the frequency domain of the material, Bi2Te3. There has been a reference to the materials used in the thermoelectric applications and the theory of equivalent passive RC circuits and thermal quadrupoles have been developed. We simulate the experimental data of a commercial TE module that consists of 31 semiconductor couples of Bi2Te3 blocks and we compare the results with those of a single Bi2Te3 block. The fitting procedure involves both models.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
Re-transcription of unpublished Whilkut texts
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-300120-06 and VP-300120-07: Re-transcription and translation of Whilkut texts transcribed by P.E. Goddard, American Philosophical Society Na20j.1, notebook #1, pp. 99-100 (VP-300120-06) and pp. 99-100 (VP-300120-07).
NN Final-State Interaction in the Helicity Dependence of Inclusive $π^-$ Photoproduction from the Deuteron
Creators: name: Darwish, Eed M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The helicity dependence of the inclusive $π^-$ photoproduction reaction from the deuteron in the $Δ$(1232)-resonance region is investigated with inclusion of final-state nucleon-nucleon rescattering ($NN$-FSI). For the elementary $π$-production operator an effective Lagrangian model which includes the standard pseudovector Born terms and a contribution from the $Δ$-resonance is used. The half-off-shell $NN$-scattering matrix is obtained from a separable representation of a realistic $NN$-interaction. The differential polarized cross-section difference for parallel and antiparallel helicity states is predicted and compared with experiment. We find that the effect of $NN$-FSI is much less important in the helicity difference than in the previously studied unpolarized differential cross section. Furthermore, the contribution of $\vec d(\vecγ,π^-)pp$ to the deuteron spin asymmetry is explicitly evaluated with inclusion of $NN$-FSI. It has been found that the effect of $NN$-FSI is much larger in the asymmetry than in the total cross section, and this leads to an appreciable reduction of the spin asymmetry in the $Δ$-region. Inclusion of such effect also leads to improved and quite satisfactory agreement with existing experimental data.
description: 13 pages, 6 eps figures, published in Prog. Theor. Phys. 113 (2005) 169-181
CALCAREOUS NANNOFOSSIL EVENTS IN THE LOWER-MIDDLE PLEISTOCENE TRANSITION AT THE MONTALBANO JONICO SECTION AND ODP SITE 964: CALIBRATION WITH ISOTOPE AND SAPROPEL STRATIGRAPHY
Creators: name: MAIORANO, PATRIZIA
name: MARINO, MARIA
name: DI STEFANO, ENRICO
name: CIARANFI, NERI
Publisher: name: Università degli Studi di Milano
Year: 2004

description: We present quantitative data on calcareous nannofossil biostratigraphy in the section of Montalbano Jonico (Southern Italy). This is one of the candidate Global Statotype Section and Point (GSSP) of the Middle Pleistocene. The first common occurrence (FCO) and last common occurrence (LCO) of Reticulofenestra asanoi are well detectable in the section and are here proposed as additional events for improving biostratigraphic resolution in the interval corresponding to the transition between the small Gephyrocapsa Zone and Pseudoemiliania lacunosa Zone. The potential value of the bioevents is tested in a Mediterranean deep-sea core of ODP Site 964, located in the Ionian Sea. At Site 964 the FCO of R. asanoi occurs in the marine oxygen isotope stage (MIS) 30, and the LCO of the species correlates with MIS 23. The ages of the FCO and LCO of R. asanoi have been estimated at 1.06 Ma and 0.93 Ma respectively. The first occurrence (FO) of Gephyrocapsa sp. 3 has been correlated to MIS 25, both at Site 964 and at the Montalbano Jonico section. The age of the FO of Gephyrocapsa sp. 3 is estimated at 0.95 Ma, based on the astronomical datings of sapropels occurring at the Montalbano Jonico section. In addition, an interval of temporary disappearance of Gephyrocapsa sp. 3 has been identified within the P. lacunosa Zone. The beginning of this interval is correlated with MIS 20/19 and can be considered a reliable event in the Mediterranean area, occurring close to the Brunhes/Matuyama magnetic boundary. The recognized events provide a basis for interpreting the Montalbano Jonico section within a standard chronostratigraphic framework.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
Gamma-ray emission from the solar halo and disk: a study with EGRET data
Creators: name: Orlando, Elena
name: Strong, Andrew W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: The Sun has recently been predicted to be an extended source of gamma-ray emission, produced by inverse-Compton (IC) scattering of cosmic-ray (CR) electrons on the solar radiation field. The emission was predicted to be extended and a confusing foreground for the diffuse extragalactic background even at large angular distances from the Sun. The solar disk is also expected to be a steady gamma-ray source. While these emissions are expected to be readily detectable in the future by GLAST, the situation for available EGRET data is more challenging. Aims: The theory of gamma-ray emission from IC scattering on the solar radiation field by Galactic CR electrons is given in detail. This is used as the basis for detection and model verification using EGRET data. Methods: We present a detailed study of the solar emission using the EGRET database, accounting for the effect of the emission from 3C 279, the moon, and other sources, which interfere with the solar emission. The analysis was performed for 2 energy ranges, above 300 MeV and for 100-300 MeV, as well as for the combination to improve the detection statistics. The technique was tested on the moon signal, with our results consistent with previous work. Results: Analyzing the EGRET database, we find evidence of emission from the solar disk and its halo. The observations are compared with our model for the extended emission. The spectrum of the solar disk emission and the spectrum of the extended emission have been obtained. The spectrum of the moon is also given. Conclusions: The observed intensity distribution and the flux are consistent with the predicted model of IC gamma-rays from the halo around the Sun.
description: Corrected typos, added acknowledgements. A&A in press
Pre-supernova feedback mechanisms drive the destruction of molecular clouds in nearby star-forming disc galaxies
Creators: name: Chevance, Mélanie
name: Kruijssen, J. M. Diederik
name: Krumholz, Mark R.
name: Groves, Brent
name: Keller, Benjamin W.
name: Hughes, Annie
name: Glover, Simon C. O.
name: Henshaw, Jonathan D.
name: Herrera, Cinthya N.
name: Kim, Jenny J.
name: Leroy, Adam K.
name: Pety, Jérôme
name: Razza, Alessandro
name: Rosolowsky, Erik
name: Schinnerer, Eva
name: Schruba, Andreas
name: Barnes, Ashley T.
name: Bigiel, Frank
name: Blanc, Guillermo A.
name: Emsellem, Eric
name: Faesi, Christopher M.
name: Grasha, Kathryn
name: Klessen, Ralf S.
name: Kreckel, Kathryn
name: Liu, Daizhong
name: Longmore, Steven N.
name: Meidt, Sharon E.
name: Querejeta, Miguel
name: Saito, Toshiki
name: Sun, Jiayi
name: Usero, Antonio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is a major open question which physical processes stop the accretion of gas onto giant molecular clouds (GMCs) and limit the efficiency at which gas is converted into stars within these GMCs. While feedback from supernova explosions has been the popular feedback mechanism included in simulations of galaxy formation and evolution, `early' feedback mechanisms such as stellar winds, photoionisation and radiation pressure are expected to play an important role in dispersing the gas after the onset of star formation. These feedback processes typically take place on small scales ($\sim 10-100$ pc) and their effects have therefore been difficult to constrain in environments other than the Milky Way. We apply a novel statistical method to $\sim 1$" resolution maps of CO and Ha emission across a sample of nine nearby disc galaxies, in order to measure the time over which GMCs are dispersed by feedback from young, high-mass stars, as a function of the galactic environment. We find that GMCs are typically dispersed within $\sim$ 3 Myr after the emergence of unembedded high-mass stars, showing no significant trend with galactocentric radius. Comparison with analytical predictions demonstrates that, independently of the environment, early feedback mechanisms (particularly photoionisation and stellar winds) play a crucial role in dispersing GMCs and limiting their star formation efficiency in nearby galaxies. Finally, we show that the efficiency at which the energy injected by these early feedback mechanisms couples with the parent GMC is relatively low (a few tens of per cent), such that the vast majority of momentum and energy emitted by the young stellar populations escapes the parent GMC.
description: 17 pages, 8 figures, 3 tables; submitted to MNRAS (October 23, 2020)
THE MIDDLE PLEISTOCENE DEPOSITS OF THE ROMAN BASIN (LATIUM, ITALY):AN INTEGRATED APPROACH OF MAMMAL BIOCHRONOLOGY AND SEQUENCE STRATIGRAPHY
Creators: name: MILLI, SALVATORE
name: RITA PALOMBO, MARIA
name: PETRONIO, CARMELO
name: SARDELLA, RAFFAELE
Publisher: name: Università degli Studi di Milano
Year: 2004

description: The biochronological setting proposed for the Plio-Pleistocene large mammal faunas of the Italian peninsula is based on the definition of faunal units (FUs) and mammal ages (MAs). Many evidences suggest that a multidisciplinary approach could enable us to better understand the actual meaning of a given faunal assemblage taking into account sedimentological and physical stratigraphic studies of the sedimentary successions in which local mammal faunas occur. The Pleistocene deposits of the Roman Basin can be considered a significant model to test this integrated approach. The detailed study of this sedimentary succession, in terms of facies analysis and sequence stratigraphy, sets some physical and temporal constrains to the occurrence of faunal complexes because the allocyclic control (climate and eustatic variations) on both landscape and stratigraphical evolution can affect the association type of mammal faunas. A correlation scheme between the Roman Pleistocene sequence-stratigraphic units and the mammal biochrons has been proposed; this approach constitutes a first tentative to connect the mammal fauna remains to the sedimentary processes which are responsible of their transport, stock and potential preservation in the depositional environments and to collocate this fauna in the systems tracts of the fourth-order depositional sequences recognised in the local Roman Basin Pleistocene succession.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
Evidence for Magnetic Ordering Associated with Metal-Insulator Transition in SmRu4P12 Studied by Muon Spin Relaxation
Creators: name: Hachitani, K.
name: Fukazawa, H.
name: Kohori, Y.
name: Watanabe, I.
name: Sekine, C.
name: Shirotani, I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Muon spin relaxation measurements on the filled skutterudite compound SmRu4P12 have been carried out in zero- and longitudinal-fields. Temperature dependence of both initial asymmetry and muon-spin depolarization rate show the appearance of a magnetically ordered state below the metal-insulator transition temperature TMI. The present study indicates that the ordering below TMI is not a non-magnetic antiferro-quadrupolar ordering but a magnetic one, which supports a scenario that a magnetic octupolar ordering occurs below TMI in SmRu4P12.
description: 5 pages, 5 figures, Phys. Rev. B 73, 052408 (2006)
NUCINELLA ALIBRANDI (CONTI, 1864) AND N. SEGUENZAE (DALL, 1898),THE LAST EUROPEAN NUCINELLIDS (BIVALVIA, PROTOBRANCHIA)
Creators: name: LA PERNA, RAFAEL
Publisher: name: Università degli Studi di Milano
Year: 2004

description: The revision of the genus Nucinella Wood, 1851 from the Italian Pleistocene led to the identification of two species, Nucinella alibrandi (Conti, 1864) and N. seguenzae (Dall, 1898). The former is from the continental shelf deposit of Monte Mario (Rome), the latter from upper slope deposits in Southern Italy (Calabria and Messina). The two species are very similar to each other and differ mainly in the anterior features of hinge. The peculiar hinge of Nucinella is examined in detail and its ontogenetic changes are reported. The Tertiary to Quaternary palaeobiogeographic history of Nucinella in the European area proves the Tethyan origins of this genus. Since the closure of the seaway to the Indo-Pacific in the Early Miocene, Nucinella survived in the European waters as a Tethyan relict until the Plio-Pleistocene, when cooling caused its definitive disappearance. N. alibrandi and N. seguenzae are the last representatives of the genus in the European waters.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 2
The Radio Structure of the Narrow-Line Seyfert 1 Mrk 783 with VLBA and e-MERLIN
Creators: name: Congiu, E.
name: Kharb, P.
name: Tarchi, A.
name: Berton, M.
name: Caccianiga, A.
name: Chen, S.
name: Crepaldi, L.
name: Di Mille, F.
name: Järvelä, E.
name: Jarvis, M. E.
name: La Mura, G.
name: Vietri, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this paper, we present the analysis of new radio and optical observations of the narrow-line Seyfert 1 galaxy Mrk 783. 1.6 GHz observations performed with the e-MERLIN interferometer confirm the presence of the diffuse emission previously observed. The Very Long Baseline Array (VLBA) also detects the nuclear source both at 1.6 GHz (L-Band) and 5 GHz (C-band). While the L-band image shows only an unresolved core, the C-band image shows the presence of a partially resolved structure, at a position angle of 60°. The brightness temperature of the emission in both bands ($>10^6$ K) suggests that it is a pc-scale jet produced by the AGN. The relatively steep VLBA spectral index ($α_{VLBA} = 0.63\pm0.03$) is consistent with the presence of optically thin emission on milliarcsecond scales. Finally, we investigated two possible scenarios that can result in the misalignment between the kpc and pc-scale radio structure detected in the galaxy. We also analysed the optical morphology of the galaxy, which suggests that Mrk 783 underwent a merging in relatively recent times.
description: 10 pages, 6 figures, accepted for publication on MNRAS
CAMBRIAN LINGULID AND ACROTRETID BRACHIOPODS FROM THE IGLESIENTE AREA (CAMPO PISANO FORMATION, SOUTHWESTERN SARDINIA)
Creators: name: MERGL, MICHAL
name: ELICKI, OLAF
Publisher: name: Università degli Studi di Milano
Year: 2004

description: Cambrian brachiopods from Sardinia are investigated for the first time in this paper. The silicified specimens come from nodular limestones of the late Early to Middle Cambrian Campo Pisano Formation of Gutturu Pala (southwestern Sardinia). The brachiopod fauna consists of lingulids and acrotretids and yields two new acrotretid species, described here as Opisthotreta sardica n.sp. and Vandalotreta proclinis n.sp. Material attributed to the genus Schmidtites is reported here for the first time from both the Middle Cambrian and western Gondwana. The genus Linnarssonella is reported for the first time from the Middle Cambrian and from outside North America. Whereas most brachiopods from Gutturu Pala biostratigraphically indicate a rather undifferenciated Middle Cambrian age, the last mentioned genus points to a late Middle Cambrian age for the uppermost part of the Campo Pisano Formation.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 110, No 3
Detection of the LMC-induced sloshing of the Galactic halo
Creators: name: Erkal, Denis
name: Deason, Alis J.
name: Belokurov, Vasily
name: Xue, Xiang-Xiang
name: Koposov, Sergey E.
name: Bird, Sarah A.
name: Liu, Chao
name: Simion, Iulia T.
name: Yang, Chengqun
name: Zhang, Lan
name: Zhao, Gang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A wealth of recent studies have shown that the LMC is likely massive, with a halo mass $>10^{11} M_\odot$. One consequence of having such a nearby and massive neighbour is that the inner Milky Way is expected to be accelerated with respect to our Galaxy's outskirts (beyond $\sim 30$ kpc). In this work we compile a sample of $\sim 500$ stars with radial velocities in the distant stellar halo, $r_{\rm GC}> 50$ kpc, to test this hypothesis. These stars span a large fraction of the sky and thus give a global view of the stellar halo. We find that stars in the Southern hemisphere are on average blueshifted, while stars in the North are redshifted, consistent with the expected, mostly downwards acceleration of the inner halo due to the LMC. We compare these results with simulations and find the signal is consistent with the infall of a $1.5\times10^{11} M_\odot$ LMC. We cross-match our stellar sample with \textit{Gaia} DR2 and find that the mean proper motions are not yet precise enough to discern the LMC's effect. Our results show that the outer Milky Way is significantly out of equilibrium and that the LMC has a substantial effect on our Galaxy.
description: 9 pages, 7 figures, submitted to MNRAS. Comments welcome!
Spin current injection by intersubband transitions in quantum wells
Creators: name: Sherman, E. Ya.
name: Najmaie, Ali
name: Sipe, J. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that a pure spin current can be injected in quantum wells by the absorption of linearly polarized infrared radiation, leading to transitions between subbands. The magnitude and the direction of the spin current depend on the Dresselhaus and Rashba spin-orbit coupling constants and light frequency and, therefore, can be manipulated by changing the light frequency and/or applying an external bias across the quantum well. The injected spin current should be observable either as a voltage generated via the anomalous spin-Hall effect, or by spatially resolved pump-probe optical spectroscopy.
description: minor changes, short version published