cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The 21 Centimeter Forest
Creators: name: Furlanetto, Steven
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the prospects for studying the pre-reionization intergalactic medium (IGM) through the so-called 21 cm forest in spectra of bright high-redshift radio sources. We first compute the evolution of the mean optical depth for models that include X-ray heating of the IGM gas, Wouthuysen-Field coupling, and reionization. Under most circumstances, the spin temperature T_S grows large well before reionization begins in earnest. As a result, the optical depth is less than 0.001 throughout most of reionization, and background sources must sit well beyond the reionization surface in order to experience measurable absorption. HII regions produce relatively large "transmission gaps" and may therefore still be observable during the early stages of reionization. Absorption from sheets and filaments in the cosmic web fades once T_S becomes large and should be rare during reionization. Minihalos can produce strong (albeit narrow) absorption features. Measuring their abundance would yield useful limits on the strength of feedback processes in the IGM as well as their effect on reionization.
description: 9 pages, 5 figures, submitted to MNRAS
Variational cluster approach to the Hubbard model: Phase-separation tendency and finite-size effects
Creators: name: Aichhorn, M.
name: Arrigoni, E.
name: Potthoff, M.
name: Hanke, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using the variational cluster approach (VCA), we study the transition from the antiferromagnetic to the superconducting phase of the two-dimensional Hubbard model at zero temperature. Our calculations are based on a new method to evaluate the VCA grand potential which employs a modified Lanczos algorithm and avoids integrations over the real or imaginary frequency axis. Thereby, very accurate results are possible for cluster sizes not accessible to full diagonalization. This is important for an improved treatment of short-range correlations, including correlations between Cooper pairs in particular. We investigate the cluster-size dependence of the phase-separation tendency that has been proposed recently on the basis of calculations for smaller clusters. It is shown that the energy barrier driving the phase separation decreases with increasing cluster size. This supports the conjecture that the ground state exhibits microscopic inhomogeneities rather than macroscopic phase separation. The evolution of the single-particle spectum as a function of doping is studied in addtion and the relevance of our results for experimental findings is pointed out.
description: 7 pages, 6 figures, published version
Dose-response and Time-course experiments in the revised version of the research titled "Fecal Microbiota Transplantation Alleviates Cirrhotic Portal Hypertension in Rats through Butyrate-Mediated HDAC3 Inhibition and PI3K/Akt/eNOS Signaling Pathway Regulation"
Creators: name: Luo, Ming
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 320209
subject: Gastroenterology and hepatology

description: We appreciate the reviewer for the insightful suggestion regarding the inclusion of dose-response and time-course experiments. To evaluate the effects of butyrate and miransertib on the Akt and eNOS phosphorylation in LSECs, we conducted dose-response experiments. Furthermore, we performed time-course experiments to examine the temporal dynamics of protein phosphorylation following treatment. We have uploaded the original Western immunoblots along with the corresponding densitometric values for phospho-Akt (Ser473), total Akt, phospho-eNOS (Ser1177), and total eNOS in primary LSECs obtained from dose-response and time-course experiments.
Short-range interaction of strongly nonlocal spatial optical solitons
Creators: name: Hu, Wei
name: Ouyang, Shigen
name: Yang, Pingbao
name: Guo, Qi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A novel phenomenon is discovered that the short-range interaction between strongly nonlocal spatial solitons depends sinusoidally on their phase difference. The two neighbouring solitons at close proximate can be inter-trapped via the strong nonlocality, and propagate together as a whole. The trajectory of the propagation is a straight line with its slope controlled by the phase difference. The experimental results carried out in nematic liquid crystals agree quantitatively with the prediction. Our study suggests that the phenomenon to steer optical beams by controlling the phase difference could be used in all-optical information processing.
description: 4 pages 6 figures
Analytic Behaviour of Competition among Three Species
Creators: name: Leach, PGL
name: Miritzis, J
Publisher: name: arXiv
Year: 2006
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We analyse the classical model of competition between three species studied by May and Leonard ({\it SIAM J Appl Math} \textbf{29} (1975) 243-256) with the approaches of singularity analysis and symmetry analysis to identify values of the parameters for which the system is integrable. We observe some striking relations between critical values arising from the approach of dynamical systems and the singularity and symmetry analyses.
description: 14 pages, to appear in Journal of Nonlinear Mathematical Physics
Fast Blue Optical Transients due to Circumstellar Interaction and the Mysterious Supernova SN 2018gep
Creators: name: Leung, Shing-Chi
name: Fuller, Jim
name: Nomoto, Ken'ichi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The discovery of SN 2018gep (ZTF18abukavn) challenged our understanding of the late-phase evolution of massive stars and their supernovae (SNe). The fast rise in luminosity of this SN (spectroscopically classified as a broad-lined Type Ic SN), indicates that the ejecta interacts with a dense circumstellar medium (CSM), while an additional energy source such as $^{56}$Ni-decay is required to explain the late-time light curve. These features hint at the explosion of a massive star with pre-supernova mass-loss. In this work, we examine the physical origins of rapidly evolving astrophysical transients like SN 2018gep. We investigate the wave-driven mass-loss mechanism and how it depends on model parameters such as progenitor mass and deposition energy, searching for stellar progenitor models that can reproduce the observational data. A model with an ejecta mass $\sim \! 2 \, M_{\odot}$, explosion energy $\sim \! 10^{52}$ erg, a circumstellar medium of mass $\sim \! 0.3 \, M_{\odot}$ and radius $\sim \! 1000 \, R_{\odot}$, and a $^{56}$Ni mass of $\sim \! 0.3 \, M_{\odot}$ provides a good fit to the bolometric light curve. We also examine how interaction-powered light curves depend more generally on these parameters, and how ejecta velocities can help break degeneracies. We find both wave-driven mass-loss and mass ejection via pulsational pair-instability can plausibly create the dense CSM in SN 2018gep, but we favor the latter possibility.
description: 22 pages, 28 figures, submitted to Astrophysical Journal at 10 March 2021, accepted for publication at 27 April 2021
Θέματα του αισθητισμού στην ελληνική πεζογραφία (1893-1912)
Creators: name: Αραμπατζίδου, Ελένη
Publisher: name: Aristotle University of Thessaloniki
Year: 2002
Subjects: Λατρεία του Ωραίου
Νοσηρότητα
Ηδυπάθεια
Φύση-τέχνη
Νιτσεϊσμός-αναγέννηση
Μοντερνισμός
Love of beauty
Morbidity
Voluptuousness
Nature-artifice
Nietzscheism-regeneration
Modernism

description: Με την εργασία επιχειρείται η πρωτότυπη και συνθετική ερμηνεία της ιδεολογίας και της θεματικής του αισθητισμού στην Ελλάδα. Η μέθοδος που ακολουθείται είναι η εκ του σύνεγγυς ανάγνωση των κειμένων, ενώ η κατάταξη των συγγραφέων γίνεται κατά χρονολογική σειρά. Πριν το δεύτερο-που είναι και το κύριο μέρος-προτάσσεται εισαγωγή στα θεωρητικά ζητήματα τόσο του ελληνικού όσο και του ξενόγλωσσου αισθητισμού. Η εργασία ξεκινά από τη διαπίστωση ότι τα κείμενα που δημοσιεύτηκαν στην Ελλάδα μεταξύ του 1893 και του 1912 εμφανίζουν έντονες εκλεκτικές συγγένειες με το κίνημα του αισθητισμού στη Δύση. Η κριτική δεν άρθρωσε ποτέ συγκροτημένο λόγο για κίνημα αλλά θεώρησε τα κείμενα αυτά ως αναπαραγωγή δυτικών προτύπων. Τα συμπεράσματα της εργασίας είναι ότι: 1. Μπορούμε και στην Ελλάδα να μιλούμε για κίνημα αισθητισμού 2. Δεν πρόκειται για μίμηση δυτικών προτύπων, αφού υπήρχαν και στην ελληνική κοινωνία συγκεκριμένα αίτια που προκάλεσαν τη δημιουργία του κινήματος 3. Υφος και είδος αποτελούν βασικά κριτήρια, για να εγγράψουμε ένα κείμενο στο κίνημα και 4. Στα περισσότερα θέματα (νοσηρότητα, ανία, λατρεία του Ωραίου, δανδισμός) οι Έλληνες συμβαδίζουν με τους ξένους αισθητιστές προετοιμάζοντας το μοντερνισμό αλλά η διαφορά τους είναι η νιτσεϊκή, διονυσιακή, αναγγενητική λύση στο δίλλημα "αρρώστεια-υγεία".
description: This thesis is the attempt of an original and synthetic interpretation of the ideology and the thematics of aestheticism in Greece. The method followed is the close reading of the texts, while authors are being listed in chronological order. An introduction to the theory of the Greek and foreign aestheticism precedes the second, most central part. The thesis begins with the realisation that texts published between 1893 and 1912 in Greece show strong eclectic affinities with the movement of aestheticism in Western Europe. The critics never formed the concrete conviction that they had to deal with a movement but considered those texts as reproductions of western models. The conclusions of the thesis are: 1. We can talk about a movement of aestheticism in Greece 2. This is not about imitating western models, even in the Greek society existed causes which led to the creation of the movement 3. Style and gender are important features to look for in a text of aestheticism. 4. In most decadent themes the Greeks go along with foreign aestheticists but make a difference with their regenerating "illness-health".
Οι στρατηγικές μάθησης στη συγκρότηση curriculum για τη διδασκαλία δεύτερης και ξένης γλώσσας: η περίπτωση της νέας ελληνικής ως δεύτερης γλώσσας
Creators: name: Αγοραστός, Γιώργος
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Στρατηγικές μάθησης
Αναλυτικά προγράμματα
Μεθοδολογία έρευνας
Δεύτερη και ξένη γλώσσα
Learning strategies
Curriculum/Syllabus
Educational research methods
Second and foreign language

description: Η διατριβή ξεκινά με τη διαπίστωση ότι η διδασκαλία δεύτερης γλώσσας συχνά σεν επιτρέπει να ανταποκρίνονται γλωσσικά στις εκπαιδευτικές τους ανάγκες. Αυτό εξηγείται εν μέρει από το γεγονός ότι η Γ2 συχνά διδάσκεται ως ξένη γλώσσα και ότι απουσιάζει μια συνολική θεωρία μάθησης. Ετσι, οι διδακτέοι στόχοι δε μετατρέπονται σε διδάξιμους στόχους. Για να αντιμετωπιστούν αυτοί οι περιορισμοί χρησιμοποιήθηκαν ως πλαίσιο περιγραφής ευρύτερες θεωρίες μάθησης. Στα πλαίσια αυτά προτείνονται οι αρχές ενός μοντέλου σύνταξης syllabus προτεινόμενων στατηγικών μάθησης. Βάσει αυτών, συντάχθηκε και δοκιμάστηκε ένα μεθοδολογικό εργαλείο φαινομενολογικής παρατήρησης. Για την εφαρμογή και αξιολόγηση του διατυπώθηκαν 4 υποθέσεις έρευνας και η επεξεργασία των δεδομένων έγινε με το SPSS 10.5. Ακολουθούν περιγραφές δεδομένων και προτάσεις βελτίωσης του εργαλείου
description: The text begins with the freguent acknowledgement that second language(L2) teaching does not always allow the L2 students to be efficient in order to face their academic obligations. This may occur because L2 is often taught as a FL and because the lack of a global learning theory. As an outcome should be noticed that the L2(and FL) teaching programms do mostly not convert the teaching goals into teachable contents. To overcome this framework learning theories were used. According to these the conduction of an additional syllabus of learning strategies is proposed within a model for conducting this syllabus. As a revelant step, an inventory for phenomenological descriptive observation was conducted and implemented in greek primary schools. In order to evaluate the effectiveness of this inventory, 4 assumptions were elaborated and observed. The SPSS 10.5 programme was issued for the needs. Quantitative data description and critics about the inventory follow
A singular perturbation approach to the steady-state 1D Poisson-Nernst-Planck modeling
Creators: name: Kosińska, I. D.
name: Goychuk, I.
name: Kostur, M.
name: Schmid, G.
name: Hänggi, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The reduced 1D Poisson-Nernst-Planck (PNP) model of artificial nanopores in the presence of a permanent charge on the channel wall is studied. More specifically, we consider the limit where the channel length exceed much the Debye screening length and channel's charge is sufficiently small. Ion transport is described by the nonequillibrium steady-state solution of the PNP system within a singular perturbation treatment. The quantities, 1/lambda -- the ratio of the Debye length to a characteristic length scale and epsilon -- the scaled intrinsic charge density, serve as the singular and the regular perturbation parameters, respectively. The role of the boundary conditions is discussed. A comparison between numerics and the analytical results of the singular perturbation theory is presented.
description: 27 pages, 8 figures, conference: Marian Smoluchowski Symposium on Statistical Physics Zakopane, Poland, September 22-29, 2007
A sample of low-redshift BL Lacertae objects. II. EVN and MERLIN data and multi-wavelength analysis
Creators: name: Giroletti, M.
name: Giovannini, G.
name: Taylor, G. B.
name: Falomo, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new radio observations of 9 members of a sample of 29 nearby (z < 0.2) BL Lac objects. The new data have been obtained with the European VLBI Network and/or the MERLIN at 1.6 and 5 GHz and complement previous observations. For one object, the TeV source Mrk 421, we also present deep multi-epoch VLBA and Global VLBI data, which reveal a resolved diffuse jet, with clear signatures of limb brightening. We use the new and old data to estimate physical parameters of the jets of the sample from which the subset with new radio data is drawn. We derive Doppler factors in the parsec scale radio jet in the range ~2 < delta < ~9. Using HST data, we separate the contribution of the host galaxy from that of the active core. From the measured and de-beamed observables, we find a weak correlation between radio power and black hole mass, and a tight correlation between radio and optical core luminosities. We interpret this result in terms of a common synchrotron origin, with little contribution from a radiatively efficient accretion disk. The BL Lacs in our sample have de-beamed properties similar to low power radio galaxies, including the fundamental plane of black hole activity.
description: Accepted by ApJ. 17 pages
Συμβολή στη μελέτη και την πρόληψη των μαστίτιδων των προβάτων
Creators: name: Κοτανίδης, Γεώργιος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Καλιφόρνια τέστ
Γαλακτική αφυδρογόναση
California mastitis test
Lactate Dehydrogenase

description: Δείγματα γάλακτος από 50 πρωτότοκες προβατίνες φυλής Σαρδηνίας. Εξετάστηκαν για 3 διαδοχικές γαλακτικές περιόδους στη Βόρεια Ελλάδα. Από τη κλινική εξέταση των μαστών και την εργαστηριακή εξέταση των δειγμάτων γάλακτος προέκυψαν τα εξείς : α) τα διάφορα είδη του γένους Staphylococcus ήταν αυτά που κυριαρχούσαν τόσο στις κλινικές όσο και υποκλινικές μορφές μαστίτιδας β) η κατηγορία που ονομάσαμε "μη στείρα υγιή ημιμόρια" παρουσίαζε τη μεγαλύτερη προδιάθεση εμφάνισης μαστίτιδας σε κάποια χρονική στιγμή της γαλακτικής περιόδου και ακολουθούσε η κατηγορία των ημιμορίων με "μη κλινική ενδομαστική μόλυνση" και κατόπιν η τρίτη κατηγορία που ονομάσαμε "στείρα υγιή ημιμόρια" γ) γάλα φυσιολογικό προερχόμενο από ημιμόριο χωρίς κλινικά συμπτώματα με αριθμό μικροβίων πάνω από 1000/ML, με αριθμό σωματικών κυττάρων πάνω από 0,5x10(6) κυτ/ML και τιμή της LDH πάνω από 150MU/ML αποτελεί κλασικό δείγμα υποκλινικής μαστίτιδας. Επίσης, η τιμή της LDH αποτελεί και πρώιμο δείκτη υποκλινικής μαστίτιδας, όταν παίρνει τιμές μεγαλύτερες από 150MU/ML σε φυσιολογικό γάλα δ) υπάρχει σημαντικός συσχετισμός ανάμεσα στον αριθμό σωματικών κυττάρων με το fossomatic και του Καλιφόρνια τέστ ε) η ενδομαστική χορήγηση αντιβιοτικού στο τέλος της γαλακτικής περιόδου, έχει ιδιαίτερα θετικά αποτελέσματα τόσο στην εξυγίανση του μαστού όσο και στην προληπτική δράση που ασκείται έναντι της μαστίτιδας, για την επόμενη γαλακτική περίοδο και στ)μεταξύ της 1ης και 2ης γαλακτικής περιόδου δεν υπάρχει στατιστική διαφορά, όσον αφορά στο ποσοστό εμφάνισης ναστίτιδας σε αντίθεση με τη σημαντική στατιστική διαφορά που παρατηρείται μεταξύ της 2ης και 3ης γαλακτικής περιόδου
description: Milk sample from 50 primiparous sarde ewe's were investigated for 3 lactation period in Northern Greece. The results of this study are as follows : a) staphylococcus SPP. was the most common isolated bacteria from the udders of clinical and subclinical mastitis b)"now sterile healthy udders" presents the more predisposition of provoking mastitis than "non-clinical intramammary infection" and "sterile cell counts was the highest limit in order to have normal milk higher than this, along with 1000 bacteria/ML and more, and LDH activity more than 150MU?ML, indicated subclinical mastitis. LDH activity was higher than 150MU/ML in infected udder and it shows that it is a suitable variety for early detection of subclinical mastitis d) there is a significant positive correlation between somatic cell counts which was measured by fossomatic counter and California mastitis test e)intramammary infusion of antibiotic at the end of lactation period is less likely to develop a new intramammary infection in the next lactation and also appears to cure existing infections f)the first and second lactate periods had had the same rate of mastitis while the rate from the third period was significantly higher
Why anthropic reasoning cannot predict Lambda
Creators: name: Starkman, Glenn D.
name: Trotta, Roberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisit anthropic arguments purporting to explain the measured value of the cosmological constant. We argue that different ways of assigning probabilities to candidate universes lead to totally different anthropic predictions. As an explicit example, we show that weighting different universes by the total number of possible observations leads to an extremely small probability for observing a value of Lambda equal to or greater than what we now measure. We conclude that anthropic reasoning within the framework of probability as frequency is ill-defined and that in the absence of a fundamental motivation for selecting one weighting scheme over another the anthropic principle cannot be used to explain the value of Lambda, nor, likely, any other physical parameters.
description: 4 pages, 1 figure. Discussion slighlty expanded, refs added, conclusions unchanged. Matches published version
Improved time-delay lens modelling and $H_0$ inference with transient sources
Creators: name: Ding, Xuheng
name: Liao, Kai
name: Birrer, Simon
name: Shajib, Anowar J.
name: Treu, Tommaso
name: Yang, Lilan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Strongly lensed explosive transients such as supernovae, gamma-ray bursts, fast radio bursts, and gravitational waves are very promising tools to determine the Hubble constant ($H_0$) in the near future in addition to strongly lensed quasars. In this work, we show that the transient nature of the point source provides an advantage over quasars: the lensed host galaxy can be observed before or after the transient's appearance. Therefore, the lens model can be derived from images free of contamination from bright point sources. We quantify this advantage by comparing the precision of a lens model obtained from the same lenses with and without point sources. Based on Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) observations with the same sets of lensing parameters, we simulate realistic mock datasets of 48 quasar lensing systems (i.e., adding AGN in the galaxy center) and 48 galaxy-galaxy lensing systems (assuming the transient source is not visible but the time delay and image positions have been or will be measured). We then model the images and compare the inferences of the lens model parameters and $H_0$. We find that the precision of the lens models (in terms of the deflector mass slope) is better by a factor of 4.1 for the sample without lensed point sources, resulting in an increase of $H_0$ precision by a factor of 2.9. The opportunity to observe the lens systems without the transient point sources provides an additional advantage for time-delay cosmography over lensed quasars. It facilitates the determination of higher signal-to-noise stellar kinematics of the main deflector, and thus its mass density profile, which in turn plays a key role in breaking the mass-sheet degeneracy and constraining $H_0$.
description: 9 pages, 4 figures, MNRAS accepted, comments welcome
Quark and lepton mass matrices with $A_4$ family symmetry
Creators: name: Sawanaka, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Realistic quark masses and mixing angles are obtained applying the successful $A_4$ family symmetry for leptons, motivated by the quark-lepton assignments of SU(5). The $A_4$ symmetry is suitable to give tri-bimaximal neutrino mixing matrix which is consistent with current experimental data. We study new scenario for the quark sector with the $A_4$ symmetry.
description: 16 pages, 2 figures, Talk given at International Workshop on Neutrino Masses and Mixings, Shizuoka, Japan, 17-19 December 2006
TripClick: The Log Files of a Large Health Web Search Engine
Creators: name: Rekabsaz, Navid
name: Lesota, Oleg
name: Schedl, Markus
name: Brassey, Jon
name: Eickhoff, Carsten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Click logs are valuable resources for a variety of information retrieval (IR) tasks. This includes query understanding/analysis, as well as learning effective IR models particularly when the models require large amounts of training data. We release a large-scale domain-specific dataset of click logs, obtained from user interactions of the Trip Database health web search engine. Our click log dataset comprises approximately 5.2 million user interactions collected between 2013 and 2020. We use this dataset to create a standard IR evaluation benchmark -- TripClick -- with around 700,000 unique free-text queries and 1.3 million pairs of query-document relevance signals, whose relevance is estimated by two click-through models. As such, the collection is one of the few datasets offering the necessary data richness and scale to train neural IR models with a large amount of parameters, and notably the first in the health domain. Using TripClick, we conduct experiments to evaluate a variety of IR models, showing the benefits of exploiting this data to train neural architectures. In particular, the evaluation results show that the best performing neural IR model significantly improves the performance by a large margin relative to classical IR models, especially for more frequent queries.
description: Accepted at SIGIR 2021
Η νομική προστασία των βάσεων δεδομένων
Creators: name: Συνοδινού, Ελένη-Τατιάνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Δίκαιο πληροφορικής
Information technology law
Πνευματική ιδιοκτησία
Intellectual law

description: Το ζήτημα της νομικής προστασίας των βάσεων συνδέεται στενά με το ζήτημα της προστασίας της πληροφορίας στην σύγχρονη εποχή. Οι βάσεις δεδομένων αποτελούν μόνο θησαυροφυλάκια αλλά και βασικά μέσα και εργαλεία διακίνησης του πληροφοριακού πλούτου. Το δίκαιο καλείται να ρυθμίσει την προστασία και την ομαλή ροή της πληροφορίας στην κοινωνία και την αγορά της πληροφορίας. Στόχος αυτής της διατριβής είναι η καλυτερη κατανόηση του πλέγματος προστασίας των βάσεων δεδομένων. Το δικαιικό πλαίσιο προστασίας των βάσεων δεδομένων που καθιερώθηκε με την κοινοτική Οδηγία 96/9/ΕΚ στοχεύει στην δικαιική κάλυψη του πληροφοριακού συνόλου ΄"βάση δεδομένων". Η δομή ή η επιλογή των περιεχομένων της βάσης δεδομένων προστατεύονται από τις διατάξεις του δικαίου πνευματικής ιδιοκτησίας. Τα περιεχόμενα της βάσης είναι δυνατό να προστατεύονται από ένα νέο, ιδιότυπο, ιδιαίτερα ισχυρό δικαίωμα, αυτό του κατασκευαστή της βάσης δεδομένων. Η ισχυρή προστασία των βάσεων δεδομένων δύναται, ωστόσο, να οδηγήσει σε μονοπωλιακή δέσμευση πληροφοριών, την οποία καλείται να αντισταθμίσει το πλέγμα των διατάξεων του δικαίου του ανταγωνισμού
description: Databases law is strongly connected to information law. Databases are the basic means of management and communication of information in the digital era. Law regulates the effective protection and the fluent dissemination of information in information society and information marked. The regime of double protection which has been established by the European Directive 96/9/E.C. aims to cover database structure and contents. Intellectual property law cover the original structure or choice of database contents, which the new suigeneris property right protects against the extraction or reuse of database contents. However, this strong protection could have indesirable monopolistic effects in information marked. Competition law through the "essential facilitier's theory is the necessary balancing factor to avoid the creation of "barriers to entry" against new competitors
Non-uniform Black Strings with Schwarzschild-(Anti-)de Sitter Foliation
Creators: name: Zhao, Liu
name: Niu, Kai
name: Xia, Bing-Shu
name: Dou, Yi-Ling
name: Ren, Jie
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present some exact non-uniform black string solutions of 5-dimensional pure Einstein gravity as well as Einstein-Maxwell-dilaton theory at arbitrary dilaton coupling. The solutions share the common property that their 4-dimensional slices are Schwarzchild-(anti-)de Sitter spacetimes. The pure gravity solution is also generalized to spacetimes of dimensions higher than 5 to get non-uniform black branes.
description: LaTeX 14 pages, 3 eps figures. V2: version appeared in CQG
Προστασία του εργαζομένου από την αφερεγγυότητα του εργοδότη
Creators: name: Σιδέρης, Δημήτρης Χρ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Αφερεγγυότητα
Ειδική εκκαθάριση
Προνόμιο
Ομιλος επιχειρήσεων
Μεταβίβαση επιχείρησης
Insolvency act
Administration volundary

description: Η διατριβή πραγματεύεται την προστασία της θέσης εργασίας και των εργατικών απαιτήσεων κατά το στάδιο της πτώχευσης και της ειδικής εκκαθάρισης των επιχειρήσεων. Περιέχει, επίσης, ειδική αναφορά στους ομίλους επιχειρήσεων και στην αυτοδύναμη προστασία των εργαζομένων (απεργία, επίσχεση εργασίας). Σε ξεχωριστό κεφάλαιο αναλύεται διεξοδικά το κοινοτικό δίκαιο της προστασίας των εργαζομένων από την αφερεγγυότητα του εργοδότη. Γίνεται ειδική αναφορά στις ομαδικές απολύσεις και στη μεταβίβαση των επιχειρήσεων, όταν ο εργοδότης καταστεί αφερέγγυος. Η προστασία του εργαζομένου κρίνεται ως μη ικανοποιητική.
Creating effective workshops using The Carpentries inclusive pedagogy
Creators: name: Allen, Kristian
name: Dennis, Tim
name: Otsuji, Reid
Publisher: name: Zenodo
Year: 2019
Subjects: pedagogy
carpentries
data science

description: Funding bodies, campus initiatives, and professional associations have recently placed an increasing importance on training as a way to help researchers, librarians and IT staff better engage with the expanding array of tools, research techniques, and vast amounts of data. The objective of many of these training programs is to improve the skills of researchers, librarians and IT staff in working with data. But how do we do this effectively in a way that promotes inclusivity? The Carpentries is an open, global community teaching researchers the skills to turn data into knowledge using evidence-based teaching practices. This session provides an overview of the inclusive pedagogy and teaching practices the Carpentries uses to create, teach and improve on their workshops. Specifically, we will cover how the Carpentries create a welcoming and supportive environment for all people regardless of background or identity. How we design our workshops with a focus on instilling a ‘growth mindset’, so learners can gain confidence in their abilities to continue learning. Finally, we'll cover some teaching practices and tips we use in our workshops that we’ve found effective in teaching technical topics to novices.
Μορφές προβολής των εθνικών ζητημάτων στην Κωνσταντινούπολη και Ανατολική Θράκη, κατά την περίοδο 1875-1900
Creators: name: Θεοδώρου, Μάρθα
Publisher: name: Aristotle University of Thessaloniki
Year: 2001

description: Δεν διατίθεται προς το παρόν περίληψη
Regularity, asymptotic behavior and partial uniqueness for Smoluchowski's coagulation equation
Creators: name: Mischler, Stéphane
name: Cañizo, José Alfredo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider Smoluchowski's equation with a homogeneous kernel of the form $a(x,y) = x^αy ^β+ x^βy^α$ with $-1 < α\leq β< 1$ and $λ:= α+ β\in (-1,1)$. We first show that self-similar solutions of this equation are infinitely differentiable and prove sharp results on the behavior of self-similar profiles at $y = 0$ in the case $α< 0$. We also give some partial uniqueness results for self-similar profiles: in the case $α= 0$ we prove that two profiles with the same mass and moment of order $λ$ are necessarily equal, while in the case $α< 0$ we prove that two profiles with the same moments of order $α$ and $β$, and which are asymptotic at $y=0$, are equal. Our methods include a new representation of the coagulation operator, and estimates of its regularity using derivatives of fractional order.
Differential polarisation studies of the deffuse interstellar band and Be stars
Creators: name: Dinshaw, Nadine
Publisher: name: University of British Columbia
Year: 2008

description: A microcomputer-controlled polarisation analyser has been designed and built at the Dominion Astrophysical Observatory specifically for the 1.83-m telescope. It is mounted before the Cassegrain spectrograph entrance, and is capable of providing spectropolarime-try at the full (--, 0.15 A) resolution of the spectrograph-detector system. The device uses a polarising beam splitter for selecting a plane of polarisation, and a quarter-wave plate to remove most 90%) of the effects of instrumental polarisation. The throughput of the analyser is --, 40%. The analyser may be rotated at a rate of up to 12.5° s'; position angles of the analyser may be set to within +0.5°. We present the results of three studies carried out with the polarisation analyser: if the diffuse interstellar bands arise in the same grains which produce the optical continuum polarisation, whereby the bands represent spectral regions of enhanced extinction, then a corresponding enhancement in the polarisation is expected. Differential polarization measurements in four of the strongest diffuse features in the spectra of HD 183143, 55 Cyg and Per revealed no polarisation structure through any of the bands at levels significantly lower than those predicted. From our results, we have established upper limits to the variation of polarisation in the 5780, 5797, 6177 and 6284 A bands of 0.01, 0.01, 0.02 and0.03%, respectively. We conclude that the diffuse features are not associated with the grains responsible for the continuum polarisation. Intermediate-sized grains (0.02 < a <0.1pm) which are poorly aligned or spherical are still consistent with our results as well as other observational properties of the bands. The absence of polarisation tends to favour a molecular origin for the diffuse bands. Attempts to measure differential polarisation associated with the line profile variations of two OB stars are also described. Analysis of the travelling subfeatures in the H/3 line of C Oph and the H/3 and He I \4921 lines of E Per failed to reveal polarisation structure with upper limits of 0.08% and 0.1%, respectively. Differential polarisation measurements in the 11,3 emission line of three intrinsically polarised Be stars are described. The stars Per and -y Cas exhibit significant polarization changes across the HO line. These changes are characterised by a decrease of polarization toward the center of the line and an increase at the line center itself. Our observations also show strong evidence for variations in the plane of polarisation across the line. We argue that unpolarised line emission cannot completely account for the observed polarization changes. Indeed, some of the polarisation structure especially in the line wings appears to be caused by absorption processes in a rotating circumstellar envelope. No significant change of polarisation was detected in the line of 28 Cyg.
Ultrafast Dynamics of Gallium Vacancy Charge States in $β$-Ga$_2$O$_3$
Creators: name: Singh, Arjan
name: Koksal, Okan
name: Tanen, Nicholas
name: McCandless, Jonathan
name: Jena, Debdeep
name: Huili
name: Xing
name: Peelaers, Hartwin
name: Rana, Farhan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Point defects in crystalline materials often occur in multiple charge states. Although many experimental methods to study and explore point defects are available, techniques to explore the non-equilibrium dynamics of the charge states of these defects at ultrafast (sub-nanosecond) time scales have not been discussed before. We present results from ultrafast optical-pump supercontinuum-probe spectroscopy measurements on $β$-Ga$_2$O$_3$. The study of point defects in $β$-Ga$_2$O$_3$ is essential for its establishment as a material platform for high-power electronics and deep-UV optoelectronics. Use of a supercontinuum probe allows us to obtain the time-resolved absorption spectra of material defects under non-equilibrium conditions with picosecond time resolution. The probe absorption spectra shows defect absorption peaks at two energies, $\sim$2.2 eV and $\sim$1.63 eV, within the 1.3-2.5 eV probe energy bandwidth. The strength of the absorption associated with each peak is time-dependent and the spectral weight shifts from the lower energy peak to the higher energy peak with pump-probe delay. Further, maximum defect absorption is seen for probe polarized along the crystal c-axis. The time-dependent probe absorption spectra and the observed dynamics for all probe wavelengths at all pump-probe delays can be fit with a set of rate equations for a single multi-level defect. Based on first-principles calculations within hybrid density functional theory we attribute the observed absorption features to optical transitions from the valence band to different charge states of Gallium vacancies. Our results demonstrate that broadband ultrafast supercontinuum spectroscopy can be a useful tool to explore charge states of defects and defect dynamics in semiconductors.
description: 8 pages, 6 figures
X-ray Emission from Extragalactic Jets
Creators: name: Harris, D. E.
name: Krawczynski, Henric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This review focuses on the X-ray emission processes of extra-galactic jets on scales resolvable by the sub arcsec resolution of the Chandra X-ray Observatory. It is divided into 4 parts. The introductory chapter reviews the classical problems for jets, as well as those associated directly with the X-ray emission. Throughout this section, we deal with the dualisms of low powered radio sources versus high powered radio galaxies and quasars; synchrotron models versus inverse Compton models; and the distinction between the relativistic plasma responsible for the received radiation and the medium responsible for the transport of energy down the jet. The second part collects the observational and inferred parameters for the currently detected X-ray jets and attempts to put their relative sizes and luminosities in perspective. In part 3, we first give the relevant radio and optical jet characteristics, and then examine the details of the X-ray data and how they can be related to various jet attributes. The last section is devoted to a critique of the two non-thermal emission processes and to prospects for progress in our understanding of jets.
description: This is a version of a review article to be published (2006 Sep) in the Annual Reviews of Astronomy and Astrophysics, vol. 44, p. 463. 8 of the 12 figures have been removed from the article and are provided as separate jpg files to conserve space. There are 38 pages remaining in the text. Complete postscript and pdf versions are available at: http://hea-www.harvard.edu/~harris/Xjetreview/
Newtonian Binding from Lattice Quantum Gravity
Creators: name: Dai, Mingwei
name: Laiho, Jack
name: Schiffer, Marc
name: Unmuth-Yockey, Judah
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study scalar fields propagating on Euclidean dynamical triangulations (EDT). In this work we study the interaction of two scalar particles, and we show that in the appropriate limit we recover an interaction compatible with Newton's gravitational potential in four dimensions. Working in the quenched approximation, we calculate the binding energy of a two-particle bound state, and we study its dependence on the constituent particle mass in the non-relativistic limit. We find a binding energy compatible with what one expects for the ground state energy by solving the Schrödinger equation for Newton's potential. Agreement with this expectation is obtained in the infinite-volume, continuum limit of the lattice calculation, providing non-trivial evidence that EDT is in fact a theory of gravity in four dimensions. Furthermore, this result allows us to determine the lattice spacing within an EDT calculation for the first time, and we find that the various lattice spacings are smaller than the Planck length, suggesting that we can achieve a separation of scales and that there is no obstacle to taking a continuum limit. This lends further support to the asymptotic safety scenario for gravity.
description: 15 pages, 18 figures, one table, includes appendix
Pair creation in inhomogeneous fields from worldline instantons
Creators: name: Dunne, Gerald V.
name: Schubert, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show how to do semiclassical nonperturbative computations within the worldline approach to quantum field theory using ``worldline instantons''. These worldline instantons are classical solutions to the Euclidean worldline loop equations of motion, and are closed spacetime loops parametrized by the proper-time. Specifically, we compute the imaginary part of the one loop effective action in scalar and spinor QED using worldline instantons, for a wide class of inhomogeneous electric field backgrounds.
description: 10 pages, 2 figures, talk given by C.S. at X Mexican Workshop on Particles and Fields, Morelia, Mexico, Nov. 6 - 12, 2005 (to appear in the conference proceedings)
Ανάπτυξη και συμπεριφορά μικτών καταλυτών Ag-Rh/γ-Al2O3 για την αυτοδιάσπαση και την αναγωγή του N2O
Creators: name: Τζιτζιός, Βασίλειος Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2002
Subjects: Περιβαλλοντική κατάλυση
Αργυρος (Ag)
Ρόδιο (Rh)
Διάσπαση Υποξειδίου του Αζώτου (N2O)
Αναγωγή Υποξειδίου του Αζώτου (N2O)
Κινητική καταλυτικών αντιδράσεων
Evironmental catalysis
Silver
Rhodium
Decomposition of N2O
Reduction of N2O
Kinetic of catalytic reactions

description: Σκοπός της διατριβής ήταν η ανάπτυξη καταλυτικών συστημάτων για τις αντιδράσεις αναγωγής του N2O με CO και της απευθείας διάσπασης του N2O σε καταλύτες Ag, Rh και Ag-Rh σε γ-Al2O3. Αρχικά μελετήθηκε η επίδραση του φορτίου του Ag και του υποστρώματος. Από τα πειράματα αυτά προκύπτει ότι βέλτιστο φορτίο για τον Ag είναι 5% κ.β. και καταλληλότερο υπόστρωμα αυτό της γ-Al2O3. Στη συνέχεια έγινε προσθήκη Rh και Pd σε συστήματα 5% κ.β. Ag/Al2O3 και η σύγκριση αυτών των καταλυτών έδειξε ότι δραστικότερος είναι ο μικτός καταλύτης Ag-Rh. Στα συστήματα Ag, Rh και Ag-Rh μελετήθηκε η αναγωγή του N2O με CH4 και C3H6 και πραγματοποιήθηκαν πειράματα κινητικής για την διάσπαση και την αναγωγή του N2O με CO. Από τα πειράματα της κινητικής προκύπτει ότι δραστικότερο είναι το διμεταλλικό σύστημα Ag-Rh, το οποίο δεν υφίσταται παρεμπόδιση από το CO.
description: Preliminary activity tests show a synergistic effect on the yield of the reduction of N2O with CO and of the direct decomposition of N2O by the addition of small quantities of Rh in a Ag/Al2O3 catalyst. An analytical comparative kinetic study over Ag, Rh and Ag-Rh catalysts was preformed in order to explain this effect. The kinetics of N2O+CO reaction seems to follow aL-H mechanism with competitive adsorption of N2O and CO over Rh catalyst. For the direct decomposition of N2O the kinetics reaction follow aL-H mechanism with N2O inhibition. In the case of Ag-Rh the above inhibition was not observed.
Starobinksy Inflation, Gravitational Contact Terms and the Induced BEH Boson Mass
Creators: name: Hill, Christopher T.
name: Ross, Graham G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Starobinsky model of inflation remains consistent with observation, forty years after its introduction. It provides a well motivated origin for the scalar inflaton, the "scaleron" with a mass of $O(10^{13})$ GeV, emerging as a graviton degree of freedom from $R^2$ corrections to Einstein-Hilbert gravity. However the coupling of such a heavy state to the BEH ("Higgs") scalar is problematic as its quantum loop corrections can induce an unacceptably large contribution to the radiatively induced BEH scalar mass. The calculation of these corrections is normally done by Weyl transforming to the Einstein frame, yet at the quantum level Weyl transformations are fraught with ambiguities. However the recent realization that there exist "gravitational contact interactions" largely sidesteps these ambiguities. Such contact terms are necessarily present, coming from t-channel graviton exchange interactions, and they show that the theory defined in the "Jordan Frame" is identical to the theory in the Einstein frame, with additional Planck-scale suppressed interactions that take on the form of a Weyl transformation. This avoids ambiguous nonlinear field redefinitions, and reliable loop calculations are possible leading to a consistent low energy theory in an expansion in $1/M^2$. Taking account of the contact terms we study the radiative corrections to the BEH mass in the mixed Higgs/$R^2$ model with explicit scale breaking, and in an extension of the model in which exact scale symmetry is spontaneously broken.
An analytical relation between entropy production and quantum Lyapunov exponents for Gaussian bipartite systems
Creators: name: Romero, K. M. Fonseca
name: Parreira, J. E.
name: Souza, L. A. M.
name: Nemes, M. C.
name: Wreszinski, W. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study and compare the information loss of a large class of Gaussian bipartite systems. It includes the usual Caldeira-Leggett type model as well as Anosov models (parametric oscillators, the inverted oscillator environment, etc), which exhibit instability, one of the most important characteristics of chaotic systems. We establish a rigorous connection between the quantum Lyapunov exponents and coherence loss, and show that in the case of unstable environments coherence loss is completely determined by the upper quantum Lyapunov exponent, a behavior which is more universal than that of the Caldeira-Leggett type model.
description: 9 pages, 1 figure, published version
The study of doubly charmed pentaquark $c c \bar qqq$ with the SU(3) symmetry
Creators: name: Xing, Ye
name: Niu, Yuekun
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the masses and lifetimes of doubly charmed pentaquark $P_{cc\bar qqq}(q=u,d,s)$ primarily. The operation of masses carried out by the doubly heavy triquark-diquark model, whose results suggests the existence of stable states $cc\bar s ud$ with the parity $J^P=\frac{1}{2}^-$. The roughly calculation about lifetimes show the short magnitudes, $(4.65^{+0.71}_{-0.55})\times 10^{-13}s $ for the parity $J^P=\frac{1}{2}^-$ and $(0.93^{+0.14}_{-0.11})\times 10^{-12} s $ for $J^P=\frac{3}{2}^-$. Since the pentaquark $cc\bar s ud$ is interpreted as the stable bound states against strong decays, then we will focus on the production and possible decay channels of the pentaquark in the next step, the study would be fairly valuable supports for future experiments. For completeness, we systematically studied the production from $Ω_{ccc}$ and the decay modes in the framework SU(3) flavor symmetry, including the processes of semi-leptonic and two body non-leptonic decays. Synthetically, we make a collection of the golden channels.
description: 18 pages, 4 figures
Proof-of-concept implementation of human genomics variant calling pipeline using BioContainers and Galaxy
Creators: name: Tartari, Giacomo
name: Gutierrez, Salvador Capella
name: Castrense Savojardo
name: Martelli, Pier Luigi
name: Casadio, Rita
Publisher: name: F1000 Research Limited
Year: 2019

description: We present a proof-of-concept workflow from Laurie et al 2016, based on BioContainers and Galaxy. It includes one aligner, one BAM processor and one variant caller.
More specifically: Burrows Wheeler Aligner (BWA) is used to map NGS reads on the reference genome, the samtools and bcftools packages to process the BAM files and call variants, respectively. The tools, installed from the main Galaxy toolshed, were configured manually with Biocontainers images.

Containerized workflows provides a prominent advantage: the same fine tuned steps of the computation can be available to each site that requires them and can be replicated even if the execution environments differ.
There are, however, few issues still to be addressed: potential version mismatch caused by manual tool configuration, and the potential incompatibility between the command line specified in the Galaxy tool and the container.
Both issues are being worked on by providing automatic container creation via Conda, Mulled and Involucro.
In this way the exact same version and container will be used transparently (still beta at the moment of writing).

This proof-of-concept workflow is a stepping stone towards an effort in benchmarking different workflow managers in executing a well established variant calling pipeline. The same workflow will be implemented in NextFLow, CWL and Galaxy and the tools included in the workflow will run in containers.
The results will be available in OpenEBench.