cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MPEC 2024-A49 : 2024 AY
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AY

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Chandra and XMM-Newton Observations of the Vela-like Pulsar B1046-58
Creators: name: Gonzalez, M. E.
name: Kaspi, V. M.
name: Pivovaroff, M. J.
name: Gaensler, B. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from Chandra and XMM-Newton observations of the radio pulsar B1046-58. A high-resolution spatial analysis reveals an asymmetric pulsar wind nebula (PWN) ~6"x11" in size. The combined emission from the pulsar and its PWN is faint, with a best-fit power-law photon index of $Γ$=1.7 and unabsorbed luminosity of ~10^32 ergs/s in the 0.5-10.0 keV range (assuming a distance of 2.7 kpc). A spatially resolved imaging analysis suggests the presence of softer emission from the pulsar. No pulsations are detected from PSR B1046-58; assuming a worst-case sinusoidal pulse profile, we derive a 3$σ$ upper limit for the pulsed fraction in the 0.5-10.0 keV range of 53%. Extended PWN emission is seen within 2" of the pulsar; the additional structures are highly asymmetric and extend predominantly to the south-east. We discuss the emission from the PWN as resulting from material downstream of the wind termination shock, as outflow from the pulsar or as structures confined by a high space velocity. The first two interpretations imply equipartition fields in the observed structures of ~40-100 uG, while the latter case implies a velocity for the pulsar of ~ 190 n^-1/2 km/s (where n is the ambient number density in units of cm^-3). No emission from an associated supernova remnant is detected.
description: 8 pages, 4 figures. Accepted to ApJ
Development of short and long-range magnetic order in the double perovskite based frustrated triangular lattice antiferromagnet Ba2MnTeO6
Creators: name: Khatua, J.
name: Arh, T.
name: Mishra, Shashi B.
name: Luetkens, H.
name: Zorko, A.
name: Sana, B.
name: Rao, M. S. Ramachandra
name: Nanda, B. R. K.
name: Khuntia, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Oxide double perovskites wherein octahedra formed by both 3d elements and sp-based heavy elements give rise to unconventional magnetic ordering and correlated quantum phenomena crucial for futuristic applications. Here, by carrying out experimental and first principles investigations, we present the electronic structure and magnetic phases of Ba2MnTeO6, where Mn^2+ ions with S = 5/2 spins constitute a perfect triangular lattice. The magnetic susceptibility reveals a large Curie- Weiss temperature -152 K suggesting the presence of strong antiferromagnetic interactions between Mn^2+ moments in the spin lattice. A phase transition at 20 K is revealed by magnetic susceptibility and specific heat which is attributed to the presence of a sizeable inter-plane interactions. Below the transition temperature, the specific heat data show antiferromagnetic magnon excitations with a gap of 1.4 K. Furthermore, muon spin-relaxation reveals the presence of static internal fields in the ordered state and provides strong evidence of short-range spin correlations for T > TN. The DFT+U calculations and spin-dimer analysis infer that Heisenberg interactions govern the inter and intra-layer spin-frustrations in this perovskite. The inter and intra-layer exchange interactions are of comparable strengths (J1 = 4.6 K, J2 = 0.92 J1). However, a weak third nearest-neighbor ferromagnetic inter-layer interaction exists (J3=-0.04 J1) due to double-exchange interaction via the linear path Mn-O-Te-O-Mn. The combined effect of J2 and J3 interactions stabilizes a three dimensional long-range magnetic ordering in this frustrated magnet.
CMS-Συστήματα Διαχείρισης Περιεχομένου
Creators: name: Σπυριδάκου, Ελευθερία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Σύστημα Διαχείρισης Περιεχομένου
Διαχείριση γνώσης
CMS
Content Management System
Knowledge management

description: Στη συγκεκριμένη διπλωματική αναλύονται αρχικά οι έννοιες των CMS (Content Management Systems) και eb CMS και στη συνέχεια ο κύκλος ζωής τους, τα χαρακτηριστικά τους, οι λειτουργίες τους, τα λάθη που γίνονται κατά τη διαδικασία επιλογής τους, κ.α. Επίσης, γίνεται αναφορά σε δεκαέξι αξιόλογα CMS, καθώς και μια πιο βαθιά επισκόπηση σε δύο από αυτά (Joomlal και DotNetNuke) που κρίθηκαν άξια λόγου, αφού είναι τα πιο διαδεδομένα συστήματα διαχείρησης περιεχομένου και χρησιμοποιούνται παγκοσμίως.
description: First of all, this study analyse what is CMS (Content Management Systems) and specifically what is web CMS. Secondly, this study records the CMS life cycle, the CMS features, the CMS functions, the faults that there are always when someone chooses a CMS (many times it is not the proper), etc. Furthermore, I analyse sixteen very good CMS and I focus my attention especially on two of them, which are joomlal and DotNetNuke, because they are the best known of all and they are used very much everywhere in the world.
title: Using a Multiscale Modeling Approach to Correlate Reaction Conditions with Polymer Microstructure and Rheology
Creators: name: Zentel, Kristina M.
name: Degenkolb, Jonas
name: Busch, Markus
Publisher: name: Wiley-VCH
Year: 2024

description: Reaction conditions have a huge impact on the resulting polymer properties, but capturing this requires understanding the correlation of the underlying kinetics, the polymer architecture, and polymer flow behavior. Long‐chain branched polymers created randomly by free‐radical polymerization, such as low‐density polyethylene (LDPE), show complex rheological behavior and are thus interesting in this context. A study applying a multiscale modeling approach is used to simulate varying reaction conditions and predict the structure of the resulting LDPE polymer and its flow properties. A significant effect on the molecular weight distribution, but also the viscosity and extensional flow behavior can be predicted. Higher conversions, for example, lead to broader molecular weight distributions, increased long‐chain branching degrees, and a higher branching complexity. Consequently, also higher viscosities and increased strain hardening are observed in extension. Additionally, miniplant experiments are performed to resemble the simulations and compare the results. The accordance of predictions and analytical results are very good and validate the model over a wide range of reaction conditions.
Guarding curvilinear art galleries with edge or mobile guards via 2-dominance of triangulation graphs
Creators: name: Karavelas, Menelaos I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences
subject: F.2.2; I.3.5

description: We consider the problem of monitoring an art gallery modeled as a polygon, the edges of which are arcs of curves, with edge or mobile guards. Our focus is on piecewise-convex polygons, i.e., polygons that are locally convex, except possibly at the vertices, and their edges are convex arcs. We transform the problem of monitoring a piecewise-convex polygon to the problem of 2-dominating a properly defined triangulation graph with edges or diagonals, where 2-dominance requires that every triangle in the triangulation graph has at least two of its vertices in its 2-dominating set. We show that $\lfloor\frac{n+1}{3}\rfloor$ diagonal guards or $\lfloor\frac{2n+1}{5}\rfloor$ edge guards are always sufficient and sometimes necessary, in order to 2-dominate a triangulation graph. Furthermore, we show how to compute: a diagonal 2-dominating set of size $\lfloor\frac{n+1}{3}\rfloor$ in linear time, an edge 2-dominating set of size $\lfloor\frac{2n+1}{5}\rfloor$ in $O(n^2)$ time, and an edge 2-dominating set of size $\lfloor\frac{3n}{7}\rfloor$ in O(n) time. Based on the above-mentioned results, we prove that, for piecewise-convex polygons, we can compute: a mobile guard set of size $\lfloor\frac{n+1}{3}\rfloor$ in $O(n\log{}n)$ time, an edge guard set of size $\lfloor\frac{2n+1}{5}\rfloor$ in $O(n^2)$ time, and an edge guard set of size $\lfloor\frac{3n}{7}\rfloor$ in $O(n\log{}n)$ time. Finally, we show that $\lfloor\frac{n}{3}\rfloor$ mobile or $\lceil\frac{n}{3}\rceil$ edge guards are sometimes necessary. When restricting our attention to monotone piecewise-convex polygons, the bounds mentioned above drop: $\lceil\frac{n+1}{4}\rceil$ edge or mobile guards are always sufficient and sometimes necessary; such an edge or mobile guard set, of size at most $\lceil\frac{n+1}{4}\rceil$, can be computed in O(n) time.
description: 45 pages, 33 figures, short version has appeared in [M. I. Karavelas. Guarding curvilinear art galleries with edge or mobile guards. 2008 ACM Symposium on Solid and Physical Modeling (SPM08), 339-345, 2008.]; v2: new lower bound for the edge 2-dominance problem which now matches the upper bound
Susskind's Challenge to the Hartle-Hawking No-Boundary Proposal and Possible Resolutions
Creators: name: Page, Don N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Given the observed cosmic acceleration, Leonard Susskind has presented the following argument against the Hartle-Hawking no-boundary proposal for the quantum state of the universe: It should most likely lead to a nearly empty large de Sitter universe, rather than to early rapid inflation. Even if one adds the condition of observers, they are most likely to form by quantum fluctuations in de Sitter and therefore not see the structure that we observe. Here I present my own amplified version of this argument and consider possible resolutions, one of which seems to imply that inflation expands the universe to be larger than 10^{10^{10^{122}}} Mpc.
description: 24 pages, LaTeX, 8 references added and a distinction between Linde's and Vilenkin's tunneling proposals
Κυτταρικοί και ιϊκοί παράγοντες που συμβάλλουν στο σχηματισμό συγκυτίων του στελέχους S του απλού έρπητα τύπου 1 (HSV-1)
Creators: name: Παπαδοπούλου, Μιχαέλα Αγγέλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Στέλεχος S του απλού έρπη τύπου-1
Ακτίνη
Γλυκοπρωτεΐνη Β
Μακροπινοκύτωση
Rho-gtpases
Strain S of hsv-1
Actin
Glycoprotein B (GB)
Macropinocytosis

description: Κύριος στόχος της εργασίας αυτής ήταν η μελέτη τόσο των ιϊκών όσο και των κυτταρικών παραγόντων που συμβάλλουν στο σχηματισμό του συγκυτιακού φαινοτύπου του στελέχους S του HSV-1, ενός αυτοφυούς συγκυτιακού μεταλλάγματος που προήλθε από το πρωτότυπο στέλεχος F του απλού έρπη τύπου 1 HSV-1 (F), φέροντας μία μεταλλαγή στην κυτοπλασματική περιοχή της γλυκοπρωτεΐνης Β (gB). Οι κυτταρικοί παράγοντες που μελετήθηκαν σε αυτήν την εργασία ήταν η ακτίνη του κυτοσκελετού και οι Rho GTPάσες. Τα αποτελέσματα της παρούσας εργασίας έδειξαν ότι η ακτίνη είναι ένας πολύς σημαντικός παράγοντας τόσο για το σχηματισμό των συγκυτίων όσο και για τον πολλαπλασιασμό του ιού και σχετίζεται με την ενεργοποίηση των Rho-GTPασών. Επίσης τα δεδομένα από τις μελέτες ανοσοφθορισμού και την ενεργοποίηση των Rho GTPάσων (RhoA, Cdc42 και Rac) στα πρώτα λεπτά της μόλυνσης συνηγορούν στην άποψη ότι η είσοδος του HSV-1 (S) στα κύτταρα Vero γίνεται με τη βοήθεια ενός εναλλακτικού μονοπατιού εισόδου, που ονομάζεται μακροπινοκύτωση.
description: HSV-1(S) is a syncytial mutant derived from the prototype HSV-1 (F) after extensive plaque purification and carries a mutation (Leu to Pro substitution at codon 787) in the cytoplasmic domain of glycoprotein B (gB), which is responsible for syncytial phenotype. The results of this study showed the following: (i) both actin and Rho GTPases contributed to the syncytial formation since inhibitors of actin polymerization or the function of Rho GTPases resulted to concentration-dependent reduction of syncytial phenotype and considerable reduction of viral propagation. (ii) immunofluorescence studies revealed that the virus was entered and transferred to the nucleus of infected cells inside actin vesicles (size 0.5-2 μm). Additionally, the Rho GTPases (RhoA, Cdc42 and Rac) were active during early steps of HSV-1(S) infection. The above data support the hypothesis that viral penetration is achieved through macropinocytosis.
The Evolution of Obscuration in AGN
Creators: name: Treister, Ezequiel
name: Urry, C. Megan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In order to study the evolution of the relative fraction of obscured Active Galactic Nuclei (AGN) we constructed the largest sample to date of AGN selected in hard X-rays. The full sample contains 2341 X-ray-selected AGN, roughly 4 times the largest previous samples studied in this connection. Of these, 1229 (53%) have optical counterparts for which redshifts are available; these span the redshift range $z$=0-4. The observed fraction of obscured AGN declines only slightly with redshift. Correcting for selection bias, we find that the intrinsic fraction of obscured AGN must actually increase with redshift, as (1+$z$)$^α$, with $α$$\simeq0.4\pm$0.1. This evolution is consistent with the integrated X-ray background, which provides the strongest constraints at relatively low redshift, $z\sim$1. Summing over all AGN, we estimate the bolometric AGN light to be 3.8 nW m$^{-2}$ sr$^{-1}$, or $\lesssim$8% of the total extragalactic light. Together with the observed black hole mass density in the local Universe, this implies an accretion efficiency of $η\sim$0.1-0.2, consistent with the values typically assumed.
description: 12 pages, 2 figures, accepted for Astrophysical Journal Letters
Sample path generation of the stochastic volatility CGMY process and its application to path-dependent option pricing
Creators: name: Kim, Young Shin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Finance (q-fin.CP)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: This paper proposes the sample path generation method for the stochastic volatility version of CGMY process. We present the Monte-Carlo method for European and American option pricing with the sample path generation and calibrate model parameters to the American style S\&P 100 index options market, using the least square regression method. Moreover, we discuss path-dependent options such as Asian and Barrier options.
Turbulence, Feedback, and Slow Star Formation
Creators: name: Krumholz, Mark R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the outstanding puzzles about star formation is why it proceeds so slowly. Giant molecular clouds convert only a few percent of their gas into stars per free-fall time, and recent observations show that this low star formation rate is essentially constant over a range of scales from individual cluster-forming molecular clumps in the Milky Way to entire starburst galaxies. This striking result is perhaps the most basic fact that any theory of star formation must explain. I argue that a model in which star formation occurs in virialized structures at a rate regulated by supersonic turbulence can explain this observation. The turbulence in turn is driven by star formation feedback, which injects energy to offset radiation from isothermal shocks and keeps star-forming structures from wandering too far from virial balance. This model is able to reproduce observational results covering a wide range of scales, from the formation times of young clusters to the extragalactic IR-HCN correlation, and makes additional quantitative predictions that will be testable in the next few years.
description: 4 pages, 2 figures, CUP conference format. To be published in "IAU Symposium 237: Triggered Star Formation in a Turbulent ISM", eds. B. Elmegreen & J. Palous
Whole Slide Images based Cancer Survival Prediction using Attention Guided Deep Multiple Instance Learning Networks
Creators: name: Yao, Jiawen
name: Zhu, Xinliang
name: Jonnagaddala, Jitendra
name: Hawkins, Nicholas
name: Huang, Junzhou
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Traditional image-based survival prediction models rely on discriminative patch labeling which make those methods not scalable to extend to large datasets. Recent studies have shown Multiple Instance Learning (MIL) framework is useful for histopathological images when no annotations are available in classification task. Different to the current image-based survival models that limit to key patches or clusters derived from Whole Slide Images (WSIs), we propose Deep Attention Multiple Instance Survival Learning (DeepAttnMISL) by introducing both siamese MI-FCN and attention-based MIL pooling to efficiently learn imaging features from the WSI and then aggregate WSI-level information to patient-level. Attention-based aggregation is more flexible and adaptive than aggregation techniques in recent survival models. We evaluated our methods on two large cancer whole slide images datasets and our results suggest that the proposed approach is more effective and suitable for large datasets and has better interpretability in locating important patterns and features that contribute to accurate cancer survival predictions. The proposed framework can also be used to assess individual patient's risk and thus assisting in delivering personalized medicine. Codes are available at https://github.com/uta-smile/DeepAttnMISL_MEDIA.
description: 22 pages, 13 figures, published in Medical Image Analysis 65, 101789
Hamiltonian Relativistic Two-Body Problem: Center of Mass and Orbit Reconstruction
Creators: name: Alba, David
name: Crater, Horace W.
name: Lusanna, Luca
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: After a short review of the history and problems of relativistic Hamiltonian mechanics with action-at-a-distance inter-particle potentials, we study isolated two-body systems in the rest-frame instant form of dynamics. We give explicit expressions of the relevant relativistic notions of center of mass, we determine the generators of the Poincare' group in presence of interactions and we show how to do the reconstruction of particles' orbits from the relative motion and the canonical non-covariant center of mass. In the case of a simple Coulomb-like potential model, it is possible to integrate explicitly the relative motion and show the two dynamical trajectories.
description: 47 pages - minor changes
New Algorithms for Computing Field of Vision over 2D Grids
Creators: name: Debenham, Evan R. M.
name: Solis-Oba, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The aim of this paper is to propose new algorithms for Field of Vision (FOV) computation which improve on existing work at high resolutions. FOV refers to the set of locations that are visible from a specific position in a scene of a computer game. We summarize existing algorithms for FOV computation, describe their limitations, and present new algorithms which aim to address these limitations. We first present an algorithm which makes use of spatial data structures in a way which is new for FOV calculation. We then present a novel technique which updates a previously calculated FOV, rather than re-calculating an FOV from scratch. We compare our algorithms to existing FOV algorithms and show they provide substantial improvements to running time. Our algorithms provide the largest improvement over existing FOV algorithms at large grid sizes, thus allowing the possibility of the design of high resolution FOV-based video games.
description: Presented at the 6th International Conference on Computer Science, Engineering And Applications (CSEA 2020) 18 pages, 11 figures, 4 tables
Secondary cup and cap products in coarse geometry
Creators: name: Wulff, Christopher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: We construct secondary cup and cap products on coarse (co-)homology theories from given cross and slant products. They are defined for coarse spaces relative to weak generalized controlled deformation retracts. On ordinary coarse cohomology, our secondary cup product agrees with a secondary product defined by Roe. For coarsifications of topological coarse (co-)homology theories, our secondary cup and cap products correspond to the primary cup and cap products on Higson dominated coronas via transgression maps. And in the case of coarse $\mathrm{K}$-theory and -homology, the secondary products correspond to canonical primary products between the $\mathrm{K}$-theories of the stable Higson corona and the Roe algebra under assembly and co-assembly.
description: 57 pages, builds directly upon arXiv:2006.02053
Statistical properties of SZ and X-ray cluster detections
Creators: name: Pace, F.
name: Maturi, M.
name: Bartelmann, M.
name: Cappelluti, N.
name: Dolag, K.
name: Meneghetti, M.
name: Moscardini, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We calibrate the number density, completeness, reliability and the lower mass limit of galaxy-cluster detections through their thermal SZ signal, and compare them to X-ray cluster detections. Methods. We simulate maps of the thermal SZ effect and the X-ray emission from light cones constructed in a large, hydrodynamical, cosmological simulation volume, including realistic noise contributions. The maps are convolved with linear, optimised, single- and multi-band filters to identify local peaks and their signal-to-noise ratios. The resulting peak catalogues are then compared to the halo population in the simulation volume to identify true and spurious detections. Results. Multi-band filtering improves the statistics of SZ cluster detections considerably compared to single-band filtering. Observations with the characteristics of ACT detect clusters with masses M>6-9e13 M_o/h, quite independent of redshift, reach 50% completeness at ~1e14 M_o/h and 100% completeness at ~2e14 M_o/h. Samples are contaminated by only a few per cent spurious detections. This is broadly comparable to X-ray cluster detections with XMM-Newton with 100 ks exposure time in the soft band, except that the mass limit for X-ray detections increases much more steeply with redshift than for SZ detections. A comparison of true and filtered signals in the SZ and X-ray maps confirms that the filters introduce at most a negligible bias.
description: 13 pages, 17 figures, published on A&A
MPEC 2024-A50 : 2024 AZ
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 AZ

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Caging dynamics in a granular fluid
Creators: name: Reis, Pedro M.
name: Ingale, Rohit A.
name: Shattuck, Mark D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report an experimental investigation of the caging motion in a uniformly heated granular fluid, for a wide range of filling fractions, $ϕ$. At low $ϕ$ the classic diffusive behavior of a fluid is observed. However, as $ϕ$ is increased, temporary cages develop and particles become increasingly trapped by their neighbors. We statistically analyze particle trajectories and observe a number of robust features typically associated with dense molecular liquids and colloids. Even though our monodisperse and quasi-2D system is known to not exhibit a glass transition, we still observe many of the precursors usually associated with glassy dynamics. We speculate that this is due to a process of structural arrest provided, in our case, by the presence of crystallization.
description: 4 pages, 5 figures, submitted to Phys. Rev. Lett
Cosmogenic activation in double beta decay experiments
Creators: name: Cebrian, Susana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Double beta decay is a very rare nuclear process and, therefore, experiments intended to detect it must be operated deep underground and in ultra-low background conditions. Long-lived radioisotopes produced by the previous exposure of materials to cosmic rays on the Earth's surface or even underground can become problematic for the required sensitivity. Here, the studies developed to quantify and reduce the activation yields in detectors and materials used in the set-up of these experiments will be reviewed, considering target materials like germanium, tellurium and xenon together with other ones commonly used like copper, lead, stainless steel or argon. Calculations following very different approaches and measurements from irradiation experiments using beams or directly cosmic rays will be considered for relevant radioisotopes. The effect of cosmogenic activation in present and future double beta decay projects based on different types of detectors will be analyzed too.
description: Table 3 revised
Αναγνώριση / ταυτοποίηση μορίων με συγγένεια προς την πρωτεΐνη PrP
Creators: name: Μπλούκας, Γεώργιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Σπογγόμορφες εγκεφαλοπάθειες
Πρωτεΐνη Χ]
Βιβλιοθήκη φάγων
Ανοσοσάρωση
Αλυσιδωτή αντίδραση πολυμεράσης
Αλληλεπίδραση
PRP
Protein X
Phage display
Immunosacreening
PCR
Rion

description: Οι σπογγόμορφες εγκεφαλοπάθειες αποτελούν μια ομάδα νευροεκφυλλιστικών νοσημάτων με ικανότητα διάδοσης μεταξύ των ειδών. Αιτία εμφάνισης του κλινικού φαινότυπου αποτελεί η αλλαγή της τριτοταγούς διαμόρφωσης ενός ενδογενούς μορίου, της πρωτεϊνης PrP(c) στην παθολογική ισομορφή της PrP(sc). Στα πλαίσια αναζήτησης θεραπευτικής αντιμετώπισης μελετήθηκαν καινούρια πρωτεϊνικά μόρια που φαίνεται να αλληλεπιδρούν με την PrP(c). Οι τεχνικές που εφαρμόστηκαν ήταν : σάρωση βιβλιοθήκης φάγων, βιοπληροφορική επεξεργασία, παρασκευή πολυκλωνικού αντιορού, απομόνωση RNA, εφαρμογή PCR και υβριδισμός κατά Northern. Φιλοδοξία της παρούσας διπλωματικής ήταν η ταυτοποίηση της πρωτεϊνης Χ, η οποία πιστεύεται πως είναι ο καθοριστικός παράγοντας στη μετάπτωση της παθολογικής ισομορφής PrP(sc).
description: Prion diseases or else Transmissible Spongiform Encephalopathies (TSEs) belong to a family of neurodegenerative diseases that can be transmitted among species. The main cause of these diseases is the transition of a cellular protein PrP(c), to its abnormal isoform PrP(sc). Towards the goal of finding a therapeutical scheme, novel protein that seem to interact with the normal isoform have been identified and further investigated. The techniques that have been applied were: Phage Display, Bioinformatic Analysis, Polyclonal Antiserum Production, RNA isolation, PCR and Northern. Blot by bridization. The ambition of the present postgraduate thesis was the identification of protein X, a proteinaceous molecule that is believed to play a crucial role during the transition to the pathological isoform PrP(sc).
The Invisible Quantum Barrier
Creators: name: de Carvalho, J. X.
name: Hussein, M. S.
name: Li, Weibin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We construct the invisible quantum barrier which represents the phenomenon of quantum reflection using the available data. We use the Abel equation to invert the data. The resulting invisible quantum barrier is double-valued in both axes. We study this invisible barrier in the case of atom and Bose-Einstein Condensate reflection from a solid silicon surface. A time-dependent, one-spatial dimension Gross-Pitaevskii equation is solved for the BEC case. We found that the BEC behaves very similarly to the single atom except for size effects, which manifest themselves in a maximum in the reflectivity at small distances from the wall. The effect of the atom-atom interaction on the BEC reflection and correspondingly on the invisible barrier is found to be appreciable at low velocities and comparable to the finite size effect. The trapping of ultracold atoms or BEC between two walls is discussed.
description: 12 pages, 5 figures; This submission has been withdrawn by the authors.
Discovery of a new cataclysmic variable through optical variability and X-ray emission
Creators: name: Pretorius, Magaretha L.
name: Knigge, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We present discovery observations of the new cataclysmic variable star (CV) 1RXS J092737.4-191529, as well as spectra and photometry of SY Vol. The selection technique that turned up these two CVs is described; it should be efficient for finding dwarf novae with high outburst duty cycles. Methods: Two very common observational features of CVs, namely optical variability and X-ray emission, are combined to select targets for follow-up observations. Long-slit spectra were taken to identify CVs in the sample. Results: Two out of three objects selected in this way are CVs. One of these is the known dwarf nova SY Vol, while the second system, 1RXS J092737.4-191529, is a new discovery. We present medium resolution spectra, $UBVRI$ magnitudes, and high-speed photometry for both these CVs. Rapid flickering in the light curve of 1RXS J092737.4-191529 confirms the mass transferring binary nature of this object; it is probably a dwarf nova that was in quiescence during our observations.
description: 4 pages, 5 figures, accepted to A&A
Long-Term Evolution of the Sun's magnetic field during Cycles 15--19 based on their proxies from Kodaikanal Solar Observatory
Creators: name: Mordvinov, Alexander V.
name: Karak, Bidya Binay
name: Banerjee, Dipankar
name: Chatterjee, Subhamoy
name: Golubeva, Elena M.
name: Khlystova, Anna I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The regular observation of the solar magnetic field is available only for about last five cycles. Thus, to understand the origin of the variation of the solar magnetic field, it is essential to reconstruct the magnetic field for the past cycles, utilizing other datasets. Long-term uniform observations for the past 100 years as recorded at the Kodaikanal Solar Observatory (KoSO) provide such opportunity. We develop a method for the reconstruction of the solar magnetic field using the synoptic observations of the Sun's emission in the Ca II K and H$α$ lines from KoSO for the first time. The reconstruction method is based on the facts that the Ca II K intensity correlates well with the unsigned magnetic flux, while the sign of the flux is derived from the corresponding H$α$ map which provides the information of the dominant polarities. Based on this reconstructed magnetic map, we study the evolution of the magnetic field in Cycles 15--19. We also study bipolar magnetic regions (BMRs) and their remnant flux surges in their causal relation. Time-latitude analysis of the reconstructed magnetic flux provides an overall view of magnetic field evolution: emergent magnetic flux, its further transformations with the formation of unipolar magnetic regions (UMRs) and remnant flux surges. We identify the reversals of the polar field and critical surges of following and leading polarities. We found that the poleward transport of opposite polarities led to multiple changes of the dominant magnetic polarities in poles. Furthermore, the remnant flux surges that occur between adjacent 11-year cycles reveal physical connections between them.
description: 6 pages including figures; accepted for publication in ApJL
Elicitation of verbs based on Axelrod (1993)
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio files VP-290810-03, VP-290810-04, and VP-290810-05: Elicitation of verbs based on Melissa Axelrod's book "The Semantics of Time: Aspectual Categorization in Koyukon Athabaskan" (University of Nebraska Press, 1993).
FORMS AND TYPES OF PROPERTY. JOINT PROPERTY
Creators: name: Kostruba, Anatoliy
Publisher: name: Zenodo
Year: 2020
Subjects: civil law
civil relationship
legal educations
property relations.
property law
Kostruba

description: Property exists in the following forms: - private property - property of individual civil law entities (individual, legal entity). - public property - property of the people of Ukraine presented as an independent form due to the specific legal regime of its use. Specific legal regime of public property: Property state (is the impersonal property of citizens of Ukraine (subsoil); Procedure for acquiring property rights (permitting and competitive); Settlement entity having a dual (private and public) legal nature (state of Ukraine, local government). Types of property - private property Individual is the ownership of property to an individual or entity. One entity is the plurality or singularity of objects. Joint is the ownership of property jointly to several individuals or entities. Plural entities are the plurality or singularity of objects. Such item belongs simultaneously to individuals or entities entitling them to jointly exercise the powers of the property owner. It is not the thing itself that is divided between the co-owners, but the ownership over it.
Psychological realism and the simulation theory of belief attribution
Creators: name: Woudzia, Lisa Ann
Publisher: name: University of British Columbia
Year: 2009

description: The presumption of individualism within the philosophy of psychology has been challenged by Tyler Burge who, using arguments like those used by Hilary Putnam against internalistic theories of meaning, points out that the determination of content of one's beliefs depends, at least in part, upon external factors. With the demise of individualism comes the demise of supervenience, and, one would think, with the demise of supervenience comes the demise of psychological realism. This thesis represents an approach to defending psychological realism in light of the falsity of supervenience. Psychological realism can be maintained, it is argued, through the adoption of the 'simulation theory' which claims that ascriptions of psychological states are based upon a kind of process rather than a theory. This represents an alternative to the traditional view, the 'theory theory', which claims that folk psychology is a theory and psychological states are posits in that theory. It is argued that the simulation theory represents a plausible alternative to the traditional view and that this alternative can accommodate the externalist concerns raised by Burge and others without sacrificing realism.
The tri-fundamental quartic model
Creators: name: Benedetti, Dario
name: Gurau, Razvan
name: Harribey, Sabine
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a multi-scalar field theory with either short-range or long-range free action and with quartic interactions that are invariant under $O(N_1)\times O(N_2) \times O(N_3)$ transformations, of which the scalar fields form a tri-fundamental representation. We study the renormalization group fixed points at two loops at finite $N$ and in various large-$N$ scaling limits for small $ε$, the latter being either the deviation from the critical dimension or from the critical scaling of the free propagator. In particular, for the homogeneous case $N_i = N$ for $i=1,2,3$, we study the subleading corrections to previously known fixed points. In the short-range model, for $εN^2\gg 1$, we find complex fixed points with non-zero tetrahedral coupling, that at leading order reproduce the results of arXiv:1707.03866 ; the main novelty at next-to-leading order is that the critical exponents acquire a real part, thus allowing a correct identification of some fixed points as IR stable. In the long-range model, for $εN \ll 1 $, we find again complex fixed points with non-zero tetrahedral coupling, that at leading order reproduce the line of stable fixed points of arXiv:1903.03578; at next-to-leading order, this is reduced to a discrete set of stable fixed points. One difference between the short-range and long-range cases is that, in the former the critical exponents are purely imaginary at leading-order and gain a real part at next-to-leading order, while for the latter the situation is reversed.
description: 26 pages, 1 figure
Microphone check
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio files VP-290810-01 and VP-290810-02: Microphone check (Verdena says the date in Hupa).
Cornell Caltech Atacama Telescope (CCAT): a 25 m aperture telescope above 5000 m altitude
Creators: name: Sebring, Thomas A.
name: Giovanelli, Riccardo
name: Radford, Simon
name: Zmuidzinas, Jonas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cornell, California Institute of Technology (Caltech), and Jet Propulsion Lab (JPL) have joined together to study development of a 25 meter sub-millimeter telescope (CCAT) on a high peak in the Atacama region of northern Chile, where the atmosphere is so dry as to permit observation at wavelengths as short as 200 micron. The telescope is designed to deliver high efficiency images at that wavelength with a total 1/2 wavefront error of about 10 microns. With a 20 arc min field of view, CCAT will be able to accommodate large format bolometer arrays and will excel at carrying out surveys as well as resolving structures to the 2 arc sec. resolution level. The telescope will be an ideal complement to ALMA. Initial instrumentation will include both a wide field bolometer camera and a medium resolution spectrograph. Studies of the major telescope subsystems have been performed as part of an initial Feasibility Concept Study. Novel aspects of the telescope design include kinematic mounting and active positioning of primary mirror segments, high bandwidth secondary mirror segment motion control for chopping, a Calotte style dome of 50 meter diameter, a mount capable of efficient scanning modes of operation, and some new approaches to panel manufacture. Analysis of telescope performance and of key subsystems will be presented to illustrate the technical feasibility and pragmatic cost of CCAT. Project plans include an Engineering Concept Design phase followed by detailed design and development. First Light is planned for early 2012.
description: 2006 SPIE Meeting
The Epoch of Giant Planet Migration Planet Search Program. I. Near-Infrared Radial Velocity Jitter of Young Sun-like Stars
Creators: name: Tran, Quang H.
name: Bowler, Brendan P.
name: Cochran, William D.
name: Endl, Michael
name: Stefansson, Gudmundur
name: Mahadevan, Suvrath
name: Ninan, Joe P.
name: Bender, Chad F.
name: Halverson, Samuel
name: Roy, Arpita
name: Terrien, Ryan C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present early results from the Epoch of Giant Planet Migration program, a precise RV survey of over one hundred intermediate-age ($\sim$20$-$200 Myr) G and K dwarfs with the Habitable-Zone Planet Finder spectrograph (HPF) at McDonald Observatory's Hobby-Eberly Telescope (HET). The goals of this program are to determine the timescale and dominant physical mechanism of giant planet migration interior to the water ice line of Sun-like stars. Here, we summarize results from the first 14 months of this program, with a focus on our custom RV pipeline for HPF, a measurement of the intrinsic near-infrared RV activity of young Solar analogs, and modeling the underlying population-level distribution of stellar jitter. We demonstrate on-sky stability at the sub-2 m s$^{-1}$ level for the K2 standard HD 3765 using a least-squares matching method to extract precise RVs. Based on a subsample of 29 stars with at least three RV measurements from our program, we find a median RMS level of 34 m s$^{-1}$. This is nearly a factor of 2 lower than the median RMS level in the optical of 60 m s$^{-1}$ for a comparison sample with similar ages and spectral types as our targets. The observed near-infrared jitter measurements for this subsample are well reproduced with a log-normal parent distribution with $μ=4.15$ and $σ=1.02$. Finally, by compiling RMS values from previous planet search programs, we show that near-infrared jitter for G and K dwarfs generally decays with age in a similar fashion to optical wavelengths, albeit with a shallower slope and lower overall values for ages $\lesssim$1 Gyr.
Wiener-hopf δείκτες παραγοντοποίησης
Creators: name: Καζαντζίδου, Χριστίνα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Πολυωνυμικοί πίνακες
Ρητοί πίνακες
Wiener-hopf δείκτες παραγοντοποίησης
Τοπικοί Wiener-hopf δείκτες παραγοντοποίησης
Πεπερασμένη δομή
Απειρη δομή
Polynomial matrices
Rational matrices
Wiener hopf factorization indices
Local Wiener Hopf factorization indices
Finite structure
Infinite structure

description: Οι έννοιες της Wiener - Hopf παραγοντοποίησης και των αντίστοιχων δεικτώνπαραγοντοποίησης είναι ευρέως γνωστές . Οι Wiener - Hopf δείκτες παραγοντο-ποίησης παίζουν σημαντικό ρόλο στην αλγεβρική θεωρία συστημάτων . Είναιχρήσιμοι στις singular ολοκληρωτικές εξισώσεις , στις Wiener - Hopf εξισώσεις ,στις διαφορικές εξισώσεις μερικών παραγώγων και στην ταξινόμηση τωνολομορφικών διανυσμάτων πάνω στη σφαίρα του Riemann . Επίσης , έχουνμεγάλη σημασία στην θεωρία Fredholm και στην μελέτη της κλάσης τωντελεστών Toeplitz . Στο πρώτο κεφάλαιο μελετούμε τους πολυωνυμικούς καιρητούς πίνακες καθώς και την πεπερασμένη και άπειρη δομή τους . Στο δεύ-τερο κεφάλαιο εισάγουμε βασικές έννοιες της θεωρίας συστημάτων . Στο τρίτοκεφάλαιο ορίζουμε την Wiener - Hopf παραγοντοποίηση και τους αντίστοιχουςδείκτες παραγοντοποίησης όπως και τους τοπικούς Wiener - Hopf δείκτεςπαραγοντοποίησης και τους συσχετίζουμε με έννοιες της θεωρίας ελέγχου .Επιπλέον , παρουσιάζονται κάποια αποτελέσματα όσον αφορά τις ιδιότητέςτους . Αυτά οδηγούν σε αλγόριθμους , οι οποίοι παρουσιάζονται στο τέταρτοκεφάλαιο , που τους υπολογίζουν . Τέλος , στο πέμπτο κεφάλαιο , ερευνάται ησχέση των Wiener - Hopf δεικτών παραγοντοποίησης με την πεπερασμένη καιάπειρη δομή πολυωνυμικών και ρητών πινάκων.
description: The concepts of the Wiener - Hopf factorization and the corresponding indicesare widely known . Wiener - Hopf factorization indices play an important rolein algebraic system theory . The are useful to singular integral equations ,Wiener - Hopf equations , partial differential equations and the classification ofvectors on the Riemann shpere . Furthermore , they are of great importance inthe Fredholm theory and the study of the class of Toeplitz operators . In thefirst chapter , we study polynomial and rational matrices and their finite andinfinite structure as well . In the second chapter , we introduce some basicconcepts of the system theory . In the third chapter , we define Wiener - Hopffactorization , Wiener - Hopf factorization indices and local Wiener - Hopffactorization indices and relate them to concepts of control theory . Moreover ,some important results are presented , concerning their properties . These leadto algorithms , which are introduced in the fourth chapter , that compute them .Finally , in the fifth chapter , the relationship between the Wiener - Hopffactorization indices and the finite and infinite structure of polynomial andrational matrices is investigated .
W + Jet Production at CDF
Creators: name: Messina, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The cross section for the inclusive production of W bosons in association with jets in ppbar collisions at sqrt(s)=1.96 TeV using the Collider Detector at Fermilab (CDF II) is presented. The measurement is based on an integrated luminosity of 320pb^-1, and includes events with up to 4 or more jets. In each jet multiplicity sample the differential and cumulative cross sections with respect to the transverse energy of the i^th-jet are measured. For W+>=2 jets the differential cross section with respect to the 2-leading jets invariant mass m_j1j2 and angular separation Delta R_j1j2 is also reported. The data are compared to predictions from Monte Carlo simulations.
description: 4 pages, FERMILAB-CONF-06-377-E, to appear in the proceedings of the 14th International Workshop on Deep Inelastic Scattering (DIS2006)
Generalized MSTB Models: Structure and kink varieties
Creators: name: Alonso-Izquierdo, A.
name: Guilarte, J. Mateos
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we describe the structure of a class of two-component scalar field models in a (1+1) Minkowskian space-time which generalize the well-known Montonen-Sarker-Trullinger-Bishop -hence MSTB- model. This class includes all the field models whose static field equations are equivalent to the Newton equations of two-dimensional type I Liouville mechanical systems with a discrete set of instability points. We offer a systematic procedure to characterize these models and to identify the solitary wave or kink solutions as homoclinic or heteroclinic trajectories in the analogous mechanical system. This procedure is applied to a one-parametric family of generalized MSTB models with a degree-eight polynomial as potential energy density.
description: 46 pages, 18 figures, corrected typos