cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
GiD+OpenSees Interface: a major extension to nonlinear finite element analysis
Creators: name: Κάρταλης Καούνης Θεοχάρης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προσομοίωση
Μέθοδος Πεπερασμένων Στοιχείων
Ανάλυση
Simulation
Finite Element Method
Analysis

description: The objective of this dissertation is to present a new graphical user interface that has been recently developed for OpenSees, which seamlessly connects the opensees solver with the general pre/post-processor gid including its recent extension to nonlinear finite element analysis. This interface, available as open-source, is easily installed in the gid graphical environment and provides an extended set of user dialogs and tools to efficiently create model geometry, assign materials, elements and boundary conditions, select various analysis options and finally invoke the opensees solver to execute the analysis. The interface automatically transforms the bulk of numerical results produced by opensees to a gid compatible format, for the user to take advantage of the versatile gid graphical postprocessor. This includes a deformed shape viewer with animation capabilities, force/stress/strain vectors and contours, line diagrams and x-y graphs. At the present state of development, majority of advanced modeling capabilities of opensees are supported, which renders the interface as a promising alternative to the cumbersome code-based modeling, considerably shortening the respective learning curve, especially for new and inexperienced users.
description: Η παρούσα μεταπτυχιακή εργασία έχει ως κύριο στόχο την παρουσίαση ενός νέου γραφικού περιβάλλοντος που αναπτύχθηκε πρόσφατα για το πρόγραμμα ανάλυσης opensees που χρησιμοποιεί τη μέθοδο πεπερασμένων στοιχείων, καθώς και των εκτεταμένων δυνατοτήτων που υποστηρίζονται πλέον στο πλαίσιο της μη γραμμικής ανάλυσης. Πρόκειται για τη συνεργασία του opensees με το γενικής χρήσης πρόγραμμα προεπεξεργασίας και μετεπεξαργασίας gid μέσω της ανταλλαγής αρχείων. Το γραφικό περιβάλλον, διαθέσιμο πλέον ως ανοικτού κώδικα πρόγραμμα, αποτελεί μια επέκταση στο γραφικό περιβάλλον του gid και παρέχει παράθυρα αλληλεπίδρασης με το χρήστη καθώς και πλήθος εργαλείων που αφορούν τη σχεδίαση, τον ορισμό υλικών, στοιχείων, συνοριακών συνθηκών κλπ., τη διακριτοποίηση, καθώς και πληθώρα επιλογών ανάλυσης, για την οποία λαμβάνει χώρα το πρόγραμμα opensees. Το πρόγραμμα αυτόματα μετατρέπει τα ογκώδη αριθμητικά αποτελέσματα που εξάγει το opensees σε ειδικά αρχεία για την εισαγωγή τους στο γραφικό περιβάλλον μετεπεξαργασίας που παρέχεται από το gid, μέσα από το οποίο ο χρήστης μπορεί να παρακολουθήσει τα επιθυμητά αποτελέσματα όπως παραμορφωμένους φορείς, δυνάμεις, τάσεις, παραμορφώσεις μέσω διανυσμάτων ή με κλίμακα χρωμάτων, διαγράμματα εφαρμοσμένα πάνω στον φορέα καθώς και διαγράμματα μορφής x-y. Με αυτόν τον τρόπο το παρόν πρόγραμμα αποτελεί ένα εναλλακτικό και πολλά υποσχόμενο εργαλείο προσομοίωσης, ανάλυσης και μετεπεξαργασίας μοντέλων, έχοντας ως παράλληλο στόχο την εύκολη και γρήγορη ανάλογη εκπαίδευση, ειδικά για νέους και άπειρους χρήστες του opensees.
Non-Loudon-Fleury Raman scattering in spin-orbit coupled Mott insulators
Creators: name: Yang, Yang
name: Li, Mengqun
name: Rousochatzakis, Ioannis
name: Perkins, Natalia B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We revisit the theory of magnetic Raman scattering in Mott insulators with strong spin-orbit coupling, with a major focus on Kitaev materials. We show that Kitaev materials with bond-anisotropic interactions are generally expected to show both one- and two-magnon responses. It is further shown that, in order to obtain the correct leading contributions to the Raman vertex operator $\mc{R}$, one must take into account the precise, photon-assisted microscopic hopping processes of the electrons and that, in systems with multiple hopping paths, $\mc{R}$ contains terms beyond those appearing in the traditional Loudon-Fleury theory. Most saliently, a numerical implementation of the revised formalism to the case of the three-dimensional hyperhoneycomb Kitaev material $β$-Li$_2$IrO$_3$ reveals that the non-Loudon-Fleury scattering terms actually dominate the Raman intensity. In addition, they induce a qualitative modification of the polarization dependence, including, e.g., the emergence of a sharp one-magnon peak at low energies which is not expected in the traditional Loudon-Fleury theory. This peak is shown to arise from microscopic photon-assisted tunneling processes that are of similar type with the ones leading to the symmetric off-diagonal interaction $Γ$ (known to be present in many Kitaev materials), but take the form of a bond-directional magnetic dipole term in the Raman vertex. These results are expected to apply across all Kitaev materials and mark a drastic change of paradigm for the understanding of Raman scattering in materials with strong spin-orbit coupling and multiple exchange paths.
description: 16 pages, 9 figures
Μελέτη κυτταρογενετικών ευρημάτων κατά τη διερεύνηση της υπογονιμότητας και των καθ’έξιν αποβολών σε ζευγάρια από τη Βόρεια Ελλάδα
Creators: name: Ξανθοπούλου, Ελένη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: καρυότυπος
χρωμοσωμικές ανωμαλίες
καθ’έξιν αποβολές
Karyotype
chromosomal abnormalities
recurrent miscarriages

description: Ως καρυότυπος ορίζεται το σύνολο όλων των μεταφασικών χρωμοσωμάτων ενός κυττάρου. Ο καρυότυπος είναι χαρακτηριστικός για κάθε είδος και αποτελεί μια εξαιρετικά σημαντική εξέταση διότι μπορεί να δείξει ορισμένες χρωμοσωμικές ανωμαλίες (δομικές και αριθμητικές) που δεν μπορούν να ανιχνευθούν με την ίδια ευκολία με άλλες τεχνικές. Εκτός από τις ασθένειες με τις οποίες σχετίζεται άμεσα ένας παθολογικός καρυότυπος, όπως είναι το σύνδρομο Down με την τρισωμία του χρωμοσώματος 21, υπάρχουν και πολυάριθμες άλλες καταστάσεις, οι οποίες φαίνεται να σχετίζονται με τον καρυότυπο. Σε αυτές περιλαμβάνονται, μεταξύ άλλων, τα προβλήματα υπογονιμότητας, οι καθ’έξιν αποβολές και οι παλίνδρομες κυήσεις. Στο πλαίσιο αυτό, λοιπόν, στόχος της παρούσας εργασίας είναι η καταγραφή των κυτταρογενετικών ευρημάτων σε ζευγάρια από τη Βόρεια Ελλάδα που έχουν ιστορικό υπογονιμότητας ή καθ’έξιν αποβολών. Για το σκοπό αυτό, συγκεντρώθηκαν συνολικά 715 άτομα, τα οποία ελέγχθηκαν με κλασικό καρυότυπο ύστερα από καλλιέργεια λεμφοκυττάρων περιφερικού αίματος, και στη συνέχεια, πραγματοποιήθηκε επεξεργασία των δεδομένων που προέκυψαν από το δείγμα αυτό. Τα αποτελέσματα έδειξαν πως ο καρυότυπος δε σχετίζεται με το επάγγελμα και την περιοχή διαμονής των ατόμων, αλλά με το πρόβλημα που αντιμετωπίζουν τα άτομα αυτά
description: Karyotype is defined as the set of all the metaphase chromosomes of one cell. Karyotype is characteristic for each species, and is a very important examination for human because it can show some chromosomal abnormalities (structural or arithmetic) that cannot be observed by any other procedure. Except for the diseases that are immediately associated with pathological karyotype, such as the Down syndrome and the 21 trisomy, there are numerous cases that seem to be connected with karyotype. These cases include, among other, the fertility problems and the recurrent miscarriages. In this context, the main objective of this project is to record the cytogenetic findings in couples from northern Greece who have a history of infertility or recurrent miscarriages. For this reason, 715 people were collected and tested with the classic karyotype after a culture of the lymphocytes of peripheral blood, and afterwards, this data were processed. The results showed that karyotype is not associated with the profession and the place of residence, but it is connected with the problem that couples face
ความต้องการได้รับทราบข้อมูลข่าวสารของเจ้าหน้าที่สายสนับสนุน ผ่านช่องทางการสื่อสารของภาควิชาในคณะแพทยศาสตร์โรงพยาบาลรามาธิบดี
Creators: name: ณรังษี จ้อยเจนสินธุ์
name: กัลยพัชร ภู่สาระ
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ข้อมูลข่าวสาร,ช่องทางการสื่อสาร,การติดต่อสื่อสารในองค์กร

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Relating pressure response profile during hot pressing to property development in flakeboard
Creators: name: Feng, Yan
Publisher: name: University of British Columbia
Year: 2009

description: The pressure response profile of a flakeboard during hot pressing was exclusively studied using variables of flake species (aspen and lodgepole pine), flake types (small-size flakes and large-size flakes), resin contents (0 and 8 percent), moisture contents (2 and 6 percent), and press closing times (30, 60 and 90 seconds). This pressure response profile was found to reflect the panel's overall rheological behaviour in relation to each of the variables. Pressure response was related to the development of the panel properties such as vertical density gradient, modulus of rupture, modulus of elasticity, internal bond and dimensional stability, as well as the development of in situ adhesive cure. The development of a panel vertical density gradient was found to depend on the panel overall rheological behaviour during hot pressing and could be well determined either by mat pressure response or by mat displacement response. The development of the panel modulus of rupture, modulus of elasticity, and internal bond, on the other hand, depended not only on the development of the vertical density gradient, but the adhesive cure as well. The in situ adhesive cure could be determined by mat displacement response for a panel with limited rheological response during hot pressing. With large rheological response, the mat displacement was not sensitive to adhesive cure. By monitoring system temperature, mat pressure and displacement response, the developments of panel properties and in situ adhesive cure could be satisfactorily explained. The feasibility of altering panel properties by pressure manipulation was also studied. The introduction of a pressure breathing stage during hot pressing was found to improve properties only in panels with 2 percent moisture content. With 6 percent moisture content, panel properties were adversely affected.
เยาวชนไทยกับการละเมิดลิขสิทธิ์บนอินเทอร์เน็ต
Creators: name: พิมพ์อร วรรณชาติ
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: การละเมิดลิขสิทธิ์,ทรัพย์สินทางปัญญา,อินเทอร์เน็ต

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Long-Term X-Ray spectral variability of the radio-loud NLS1 galaxy PKS 0558-504
Creators: name: Gliozzi, M.
name: Papadakis, I. E.
name: Brinkmann, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present X-ray observations of the Narrow-Line Seyfert 1 galaxy PKS 0558-504 obtained with RXTE during a 1-year monitoring campaign. This source, which is one of the very few radio-loud NLS1 galaxies, shows strong X-ray flux variability on time scales of weeks-months accompanied by spectral variability. The main goal of this study is to investigate the spectral variability with model-independent methods and time-resolved spectroscopy in order to shed light on the origin of the X-rays. The main results can be summarized as follows: 1) The flux typically changes by a factor of 1.5-2 on time scales of 10-30 days, with few extreme events where the flux increases by a factor of ~4 in 3 days. 2) We do not observe any large amplitude, flux related spectral variations. During the flux variations, the spectrum varies mainly in normalization and not in shape. We do observe some small amplitude spectral variations, which do not correlate with flux, although there is a hint of spectral hardening as the source brightens. 3) There is no evidence for reprocessing features such as the Fe Kalpha line or a Compton hump. We argue that PKS 0558-504 is a peculiar object that appears to be different from most of the radio-quiet and radio-loud AGN. If a jet is responsible for the bulk of the X-rays, it must operate in an unusual way. If instead a corona is responsible for the X-rays, the system might be a large-scale analog of the Galactic black holes in the transient intermediate state.
description: 12 pages, 7 figures, accepted for publication in ApJ
ปัญหามาตรการบังคับทางปกครองในกรณีความรับผิดทางละเมิดของเจ้าหน้าที่
Creators: name: ศิริชัย วิชชุวัชรากร
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: มาตรการบังคับทางปกครอง,ความรับผิดทางละเมิดของเจ้าหน้าที่

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Pushing planets into an inner cavity by a resonant chain
Creators: name: Ataiee, S.
name: Kley, W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. The orbital distribution of exoplanets indicates an accumulation of super-Earth sized planets close to their host stars in compact systems. When an inward disc-driven migration scenario is assumed for their formation, these planets could have been stopped and might have been parked at an inner edge of the disc, or be pushed through the inner disc cavity by a resonant chain. This topic has not been properly and extensively studied. Using numerical simulations, we investigate the possibility that the inner planets in a resonant chain can be pushed into the disc inner cavity by outer planets. We performed hydrodynamical and N-body simulations of planetary systems embedded in their nascent disc. The inner edge of the disc was represented in two different ways, resembling either a dead zone inner edge (DZ) or a disc inner boundary (IB). The main difference lies in the steepness of the surface density profile. The innermost planet always has a mass of 10 M Earth , with additional outer planets of equal or higher mass. A steeper profile is able to stop a chain of planets more efficiently than a shallower profile. The final configurations in our DZ models are usually tighter than in their IB counterparts, and therefore more prone to instability. We derive analytical expressions for the stopping conditions based on power equilibrium, and show that the final eccentricities result from torque equilibrium. For planets in thinner discs, we found, for the first time, clear signs for over-stable librations in the hydrodynamical simulations, leading to very compact systems. We also found that the popular N-body simulations may overestimate the number of planets in the disc inner cavity.
description: 22 pages (including appendices), Accepted for publication in A & A
Optical polarimetric monitoring of the type II-plateau SN 2005af
Creators: name: Pereyra, A.
name: Magalhaes, A. M.
name: Rodrigues, C. V.
name: Silva, C. R.
name: Campos, R.
name: Hickel, G.
name: Cieslinski, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. Core-collapse supernovae may show significant polarization that implies non-spherically symmetric explosions. We observed the type II-plateau SN 2005af using optical polarimetry in order to verify whether any asphericity is present in the supernova temporal evolution. Methods. We used the IAGPOL imaging polarimeter to obtain optical linear polarization measurements in R (five epochs) and V (one epoch) broadbands. Interstellar polarization was estimated from the field stars in the CCD frames. The optical polarimetric monitoring began around one month after the explosion and lasted ~30 days, between the plateau and the early nebular phase. Results. The weighted mean observed polarization in R band was [1.89 +/- 0.03]% at position angle (PA) 54 deg. After foreground subtraction, the level of the average intrinsic polarization for SN 2005af was ~0.5% with a slight enhancement during the plateau phase and a decline at early nebular phase. A rotation in PA on a time scale of days was also observed. The polarimetric evolution of SN 2005af in the observed epochs is consistent with an overall asphericity of ~20% and an inclination of ~30 deg. Evidence for a more complex, evolving asphericity, possibly involving clumps in the SN 2005af envelope, is found.
description: 6 pages, 5 figures, to be published A&A
Additional file 1: of 1-Pyrroline-5-carboxylate released by prostate Cancer cell inhibit T cell proliferation and function by targeting SHP1/cytochrome c oxidoreductase/ROS Axis
Creators: name: Yan, Yutao
name: Chang, Lei
name: Tian, Hongzhe
name: Wang, Lu
name: Zhang, Yawei
name: Yang, Tao
name: Li, Guohao
name: Hu, Weifeng
name: Shah, Kavita
name: Chen, Gang
name: Guo, Yonglian
Publisher: name: figshare
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology

description: Figure S1. The Effect of PCM on T Cells and Jurkat cells, Related to Fig. 1. Figure S2. ROS Scavenger and Inhibitor of CIII Could Weaken the Effect of PCM on T cells. Figure S3. ROS Scavenger and Inhibitor of CIII Could Weaken the Effect of PCM on T cells. Figure S4. The Media of RM-1 Have No Effect on SHP1 Knockdown T Cells. Figure S5. Quality Control of the RNAseq, Rlated to Fig. 3. Figure S6. Quality Control of the Metabonomics, Rlated to Fig. 5. Figure S7. The Efficiency of PRODH Knockdown and the Effect to Cell Number, and the Effect of Additional P5C on Human CD3+ T Cells, Related to Fig. 6. Figure S8. The Change of PRODH Expression Affect CD4+ and CD8+ T cells Infiltration in vivo Which Have no Influence on Nude Mice Xenograft. Table S1. The clinical information on the patients. (DOCX 3226 kb)
Η αλούμινα ως ετερογενής πράσινος καταλύτης για την εκλεκτική σύνθεση των 2-νιτρο- και 2-αμινο-3-αρυλοϊμιδαζο[1,2-a]πυριδινών παρουσία νανοσωματιδίων Au
Creators: name: Τζάνη, Μαρίνα Αριστοτέλη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ιμιδαζο[1,2-a]πυριδίνες
Αλούμινα
Ετερογενής Κατάλυση
Imidazo[1,2-a]pyridines
Alumina
Heterogeneous Catalysis

description: Στα πλαίσια της παρούσας μεταπτυχιακής εργασίας μελετήθηκε η τοποεκλεκτική σύνθεση των 3-αρυλο-2-νιτροϊμιδαζο[1,2-a]πυριδινών σε ετερογενείς συνθήκες με τη χρήση οξινισμένου Al2O3 ως καταλύτη και ως αντιδραστήρια τις 2-αμινοπυριδίνες και τα νιτροαλκένια. Επιπλέον, έγινε μελέτη της καταλυτικής εκλεκτικής αναγωγής της νιτροομάδας που φέρουν τα ετεροκυκλικά προϊόντα στις αντίστοιχες αμίνες. Τα αποτελέσματα συνοψίζονται ως εξής: • Επιτεύχθηκε η σύνθεση μιας σειράς από 3-αρυλο-2-νιτροϊμιδαζο- [1,2-a]πυριδίνες με τη χρήση οξινισμένου οξειδίου του αργιλίου (Al2O3, 0,3M HCl) σε 1,2-διχλωροαιθάνιο (1,2-DCE). Ο χρόνος της αντίδρασης ήταν 24 ώρες, ενώ παράλληλα απαιτήθηκε θέρμανση (80oC). Με την εφαρμογή του παραπάνω πρωτοκόλλου συντέθηκαν και απομονώθηκαν οι ενώσεις 39 έως 53. • Ο καταλύτης Al2O3 (0,3Μ HCl) είναι ένας εξαιρετικά αποτελεσματικός καταλύτης για τη σύνθεση των 3-αρυλο-2-νιτροϊμιδαζο[1,2-a]πυριδινών και μπορεί να χρησιμοποιηθεί ικανοποιητικά έως και δύο φορές ενώ για περαιτέρω χρήση απαιτείται η κατεργασία του χρησιμοποιημένου καταλύτη με υδατικό διάλυμα 0,3Μ HCl. • Επιτεύχθηκε η εκλεκτική αναγωγή των 3-αρυλο-2-νιτροϊμιδαζο- [1,2-a]πυριδινών προς τις αντίστοιχες αμίνες κάτω από ήπιες συνθήκες με χρήση NaBH4 ως αναγωγικού, Au/Al2O3 (1 mol % Au) ως καταλύτη και μεθανόλης ως διαλύτη σε θερμοκρασία δωματίου. Με την εφαρμογή των παραπάνω συνθηκών συντέθηκαν και απομονώθηκαν τα παράγωγα αμινών 78 έως 92.
description: In this MSc thesis, we studied a novel regio-selective synthesis of 3-aryl-2-nitroimidazo[1,2-a]pyridines under heterogeneous conditions in the presence of acidic Al2O3 and using 2-aminopyridines and nitroalkenes as starting materials. Also, we further performed the heterogeneous Au/Al2O3 catalytic reduction of these nitro derivatives into the corresponding amines. The results are summarized as follows: • The synthesis of a variety of 3-aryl-2-nitroimidazo[1,2-a]pyridines was achieved using acidic aluminum oxide (Al2O3, 0.3M HCl) in 1,2-DCE. The reaction required 24 hours for completing at 80oC. By implementing the above protocol were synthesized and isolated compounds 39-53. • The catalyst Al2O3 (0.3M HCl) is a highly efficient catalyst for the synthesis of 3-aryl-2-nitroimidazo[1,2-a]pyridines and can be re-used two times without any significant decrease of its activity, while for further use the treatment of the used catalyst with 0.3M aqueous solution of HCl is required. • Selective reduction of 3-aryl-2-nitroimidazo[1,2-a]pyridines to the corresponding amines under mild conditions was achieved using NaBH4 as the reducing agent, Au/Al2O3 (1 mol% Au) as the catalyst in methanol at room temperature. Using the above conditions, derivatives 78 to 92 were synthesized and isolated in high yields.
$Λα$DM: Observational constraints on unified dark matter with constant speed of sound
Creators: name: Balbi, Amedeo
name: Bruni, Marco
name: Quercellini, Claudia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the hypothesis that dark energy and dark matter are the two faces of a single dark component, a unified dark matter (UDM) that we assume can be modeled by the affine equation of state (EoS) $P= p_0 +αρ$, resulting in an {\it effective cosmological constant} $ρ_Λ=-p_0/(1+α)$. The affine EoS arises from the simple assumption that the speed of sound is constant; it may be seen as an approximation to an unknown barotropic EoS $P=P(ρ)$, and may as well represent the tracking solution for the dynamics of a scalar field with appropriate potential. Furthermore, in principle the affine EoS allows the UDM to be phantom. We constrain the parameters of the model, $α$ and $Ω_Λ$, using data from a suite of different cosmological observations, and perform a comparison with the standard $Λ$CDM model, containing both cold dark matter and a cosmological constant. First considering a flat cosmology, we find that the UDM model with affine EoS fits the joint observations very well, better than $Λ$CDM, with best fit values $α=0.01 \pm 0.02$ and $Ω_Λ=0.70 \pm 0.04$ (95% confidence intervals). The standard model (best fit $Ω_Λ=0.71\pm 0.04$), having one less parameter, is preferred by a Bayesian model comparison. However, the affine EoS is at least as good as the standard model if a flat curvature is not assumed as a prior for $Λ$CDM. For the latter, the best fit values are $Ω_K=-0.02^{+0.01}_{-0.02} $ and $Ω_Λ=0.71 \pm 0.04$, i.e. a closed model is preferred. A phantom UDM with affine EoS is ruled out well beyond $3σ$.
description: 7 pages, 4 figures. Matching version published on PRD
Canto de Janãi
Creators: name: Mỹky, Janãi
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Deitado na rede, Janãi canta uma melidia tradicional.
Lying down in his hammock, Janãi sings a traditional tune.
The Generalized Weierstrass System for Nonconstant Mean Curvature Surfaces and the Nonlinear Sigma Model
Creators: name: Bracken, P
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A study of the generalized Weierstrass system which can be used to induce mean curvature surfaces in three-dimensional Euclidean space is presented.
Σύγχρονες τάσεις περιβαλλοντικής πολιτικής στα λιμάνια.Η περίπτωση του λιμένα της Θεσσαλονίκης
Creators: name: Παυλίδου-Χαραλαμπίδου, Σοφία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Λιμένες
Περιβάλλον
Διαχείριση
Ports
Environment
Management

description: Οι λιμένες αποτελούν «οικονομικές μηχανές», κατέχοντας εξέχουσα σημασία όχι μόνο για την ίδια την περιοχή του λιμένα, αλλά και για μία ευρύτερη ζώνη επιρροής, που αφορά την ενδοχώρα.Στη σημερινή εποχή, στις πόλεις που διαθέτουν λιμάνια, επικρατεί πλέον η σύγχρονη τάση αναστήλωσης της παράκτιας ζώνης, με απώτερο σκοπό τη χρησιμοποίηση του λιμένα, ως χώρο αναψυχής από τους πολίτες, για την εγκατάσταση των ναυτικών λεσχών, αλλά και για διάφορες τουριστικές δραστηριότητες, που λαμβάνουν χώρα εκεί. Στο πλαίσιο αυτό λοιπόν, οι Ευρωπαϊκές Αρχές των λιμένων είναι υπεύθυνες για την παρακολούθηση και τον έλεγχο της περιβαλλοντικής ρύπανσης, η οποία υφίσταται εξαιτίας της λειτουργίας του λιμένα και των επιμέρους λιμενικών δραστηριοτήτων του. Ως εκ τούτου, γίνεται κατανοητό πλέον, ότι ο έλεγχος στο χώρο των λιμένων είναι ζωτικής σημασίας τόσο από οικονομική και κοινωνική άποψη, όσο και από περιβαλλοντική.Στην παρούσα εργασία παρουσιάζεται η περιβαλλοντική πολιτική στους λιμένες, οι Διεθνείς Συμβάσεις, οι Ευρωπαϊκές οδηγίες, οι κανονισμοί και οι νόμοι, που διέπουν τη σχέση μεταξύ των λιμένων και του περιβάλλοντος, καθώς και τα απαραίτητα εργαλεία για την περιβαλλοντική διαχείριση των λιμένων, γεγονός που αποτελεί βασική μέριμνα των διαχειριστών των λιμένων. Εν κατακλείδι, η εργασία εστιάζει και εξετάζει την περίπτωση του λιμένα της Θεσσαλονίκης, καταγράφοντας την πολιτική και τους τρόπους με τους οποίους ο ΟΛΘ Α.Ε αντιμετωπίζει την περιβαλλοντική ρύπανση του λιμένα, εφαρμόζοντας ένα βιώσιμο σύστημα περιβαλλοντικής διαχείρισης.
description: Ports are considered to be “financial machines” of outmost importance, not only for the port area itself, but also for a wider zone of influence that reaches to the inner part of the country.Nowadays, in the cities that have ports, there is a modern approach of renovating the coastal zone, which has the purpose of using the port as a leisure area from the citizens, like establishing nautical clubs, as well as various tourist activities.On this context, European port authorities are responsible of monitoring and checking the environmental pollution that exists due to the activities that take place at the port. So it is in extend vital, from economic, social and environmental point of view, the necessity to manage port areas with quality.In this essay will be presented the environmental policy of ports, the International Conventions, the European Guidelines and National legislation, that regulate the connection between environment and ports, as well as the tools necessary for the environmental management of ports, a major concern of port managers.In conclusion, the essay focuses and examines the case of Thessaloniki’s Port, recording the policy and means that the Organization of Thessaloniki’s Port SA, is using in order to manage the environmental pollution of the port, applying a sustainable system of environmental management.
Μελέτη συμπεριφοράς δομικών στοιχείων (δοκοί/στύλοι) οπλισμένου σκυροδέματος που συντρέχουν σε τρισδιάστατους κόμβων πριν και μετά την επισκευή τους
Creators: name: Μελίδης, Λάζαρος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κόμβοι οπλισμένου σκυροδέματος
Ενίσχυση δομικών στοιχείων
Σύστημα αγκύρωσης FRP
R-C joints
Structural members strengthening
FRP anchoring szstem

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η μελέτη συμπεριφοράς δομικών στοιχείων οπλισμένου σκυροδέματος, δοκών και υποστυλωμάτων, που συντρέχουν σε τρισδιάστους κόμβους πριν και μετά την επισκευή τους. Για το σκοπό αυτό, προσομοιώνονται φορείς, τόσο υπό κλίμακα, αλλά και πρωτότυπου μεγέθους και για την αξιολόγηση των αποτελεσμάτων τους, συγκρίνονται με τα αντίστοιχα πειραματικά αποτελέσματα. Η μελέτη επικεντρώνεται στην καμπτική αστοχία των δομικών στοιχείων που συντρέχουν στον κόμβο και όχι σε αστοχίες του σώματος του κόμβου. Η προσομοίωση πραγματοποιείται με τα λογισμικά SAP2000 και ABAQUS. Αρχικά μελετώνται οι αρχικοί φορείς πριν την ενίσχυση. Πιο συγκεκριμένα, προσομοιώνεται ένα δοκίμιο υπό κλίμακα του Εργαστηρίου Πειραματικής Αντοχής Υλικών και Κατασκευών και οι κόμβοι, εσωτερικός και εξωτερικός, από ερευνητικό πρόγραμμα που πραγματοποιήθηκε σε συνεργασία Η.Π.Α. και Ιαπωνία (Joglekar et al.). Έπειτα, επιχειρείται η προσομοίωση της μεθόδου ενίσχυσης με την χρήση λωρίδων FRP έναντι σε κάμψη, αξιοποιώντας το σύστημα αγκύρωσης που προτείνεται από το Εργαστήριο Πειραματικής Αντοχής Υλικών και Κατασκευών. Τέλος, γίνεται σύγκριση των αποτελεσμάτων που προέκυψαν από τις αναλύσεις με τα αντίστοιχα πειραματικά, με σκοπό την επιβεβαίωση των αριθμητικών μοντέλων που αναπτύχθηκαν και την αξιολόγηση της αποτελεσματικότητας της μεθόδου ενίσχυσης που εφαρμόστηκε.
description: This master thesis investigates the behavior of R/C structural members (beams/columns) in 3-D joints before and after strengthening. For this purpose, 3 specimens are studied, one scaled and two full scale joints, are analyzed and compared with the corresponding experimental results. The study focuses on the bending failure of the structural elements at the joint and not on the joint’s body faults. The simulation is done with SAP2000 and ABAQUS software. The subassemblages initially studied before the reinforcement. In particular, a scaled specimen of the Laboratory of Experimental Strength of Materials and Structures Laboratory and two full scale beam-column joints, internal and external, from a research project carried out in cooperation between the United States and Japan is being simulated (Joglekar et al.). Then, simulation of the reinforcement method using FRP strips against bending failure is attempted, using the anchoring system developed by the Laboratory of Experimental Strength of Materials and Structures. Finally, the results from the analysis and the corresponding experiments are compared, in order to confirm the numerical models developed and to evaluate the effectiveness of the method of FRP strengthening.
$SU(5) \times U(1)_X$ Axion Model with Observable Proton Decay
Creators: name: Okada, Nobuchika
name: Raut, Digesh
name: Shafi, Qaisar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a $SU(5) \times U(1)_X \times U(1)_{PQ}$ model, where $U(1)_X$ is the generalization of the $B-L$ (baryon minus lepton number) gauge symmetry and $U(1)_{PQ}$ is the global Peccei-Quinn (PQ) symmetry. There are four fermions families in $\bf{\overline 5} + \bf{10}$ representations of $SU(5)$, a mirror family in $\bf{5}+\bf{\overline {10}}$ representations, and three $SU(5)$ singlet Majorana fermions. The $U(1)_X$ related anomalies all cancel in the presence of the Majorana neutrinos. The $SU(5)$ symmetry is broken at $M_{GUT} \simeq (6-9)\times 10^{15}$ GeV and the proton lifetime $τ_p$ is estimated to be well within the expected sensitivity of the future Hyper-Kamiokande experiment, $τ_p \lesssim 1.3 \times 10^{35}$ years. The $SU(5)$ breaking also triggers the breaking of the PQ symmetry, resulting in axion dark matter (DM), with the axion decay constant $f_a$ of order $M_{GUT}$ or somewhat larger. The CASPEr experiment can search for such an axion DM candidate. The Hubble parameter during inflation must be low, $H_{inf} \lesssim 10^9 $ GeV, in order to successfully resolve the axion domain wall, axion DM isocurvature and $SU(5)$ monopole problems. With the identification of the $U(1)_X$ breaking Higgs field with the inflaton field, we implement inflection-point inflation, which is capable of realizing the desired value for $H_{inf}$. The vectorlike fermions in the model are essential for achieving successful unification of the SM gauge couplings as well as the phenomenological viability of both axion DM and inflation scenario.
description: 20 pages, 3 figures, Figures 1 and 2 revised, updated version accepted for publication in PRD
Additional file 2 of Long non-coding RNA crnde promotes deep vein thrombosis by sequestering miR-181a-5p away from thrombogenic Pcyox1l
Creators: name: He, Xin
name: Liu, Yu
name: Li, Yaozhen
name: Wu, Kemin
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Supplementary Material 2
Taming the Leibniz Rule on the Lattice
Creators: name: Kato, Mitsuhiro
name: Sakamoto, Makoto
name: So, Hiroto
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a product rule and a difference operator equipped with Leibniz rule in a general framework of lattice field theory. It is shown that the difference operator can be determined by the product rule and some initial data through the Leibniz rule. This observation leads to a no-go theorem that it is impossible to construct any difference operator and product rule on a lattice with the properties of (i) translation invariance, (ii) locality and (iii) Leibniz rule. We present a formalism to overcome the difficulty by an infinite flavor extension or a matrix expression of a lattice field theory.
description: 15 pages
ปัญหาการเตรียมทีมนักกีฬาคนหูหนวกสมาคมกีฬาจังหวัด เพื่อเข้าร่วมการแข่งขัน กีฬาคนพิการแห่งชาติครั้งที่ 30
Creators: name: ชนินันท์ แย้มขวัญยืน
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: ปัญหาการเตรียมทีม นักกีฬาคนหูหนวก การแข่งขันกีฬาคนพิการ

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Radio observations of the CDF-South: a possible link between radio emission and star formation in X-ray selected AGN
Creators: name: Rovilos, E.
name: Georgakakis, A.
name: Georgantopoulos, I.
name: Afonso, J.
name: Koekemoer, A. M.
name: Mobasher, B.
name: Goudis, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the nature of the radio emission of X-ray selected AGN by combining deep radio (1.4GHz; 60micro-Jy) and X-ray data with multiwavelength (optical, mid-infrared) observations in the Extended Chandra Deep Field South (E-CDFS). The fraction of radio detected X-ray sources increases from 9% in the E-CDFS to 14% in the central region of this field, which has deeper X-ray coverage from the 1Ms CDFS. We find evidence that the radio emission of up to 60% of the hard X-ray/radio matched AGN is likely associated with star-formation in the host galaxy. Firstly, the mid-IR (24micron) properties of these sources are consistent with the infrared/radio correlation of starbursts. Secondly, most of them are found in galaxies with blue rest-frame optical colours (U-V), suggesting a young stellar population. On the contrary, X-ray/radio matched AGN which are not detected in the mid-infrared have red U-V colours suggesting their radio emission is associated with AGN activity. We also find no evidence for a population of heavily obscured radio-selected AGN that are not detected in X-rays. Finally, we do no confirm previous claims for a correlation between radio emission and X-ray obscuration. Assuming that the radio continuum measures star-formation, this finding is against models where the dust and gas clouds associated with circumnuclear starbursts are spherically blocking our view to the central engine.
description: Accepted by A&A
Additional file 3 of Long non-coding RNA crnde promotes deep vein thrombosis by sequestering miR-181a-5p away from thrombogenic Pcyox1l
Creators: name: He, Xin
name: Liu, Yu
name: Li, Yaozhen
name: Wu, Kemin
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Supplementary Material 3
แรงจูงใจในการออกกำลังกายของนักศึกษามหาวิทยาลัยราชภัฏกลุ่มรัตนโกสินทร์
Creators: name: พนิดา ไขแสง
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556
Subjects: แรงจูงใจ,การออกกำลังกาย,มหาวิทยาลัยราชภัฏกลุ่มรัตนโกสินทร์

description: 1, 9, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Η μορφή του Οδυσσέα στην αυγούστεια ποίηση (Οράτιος, Βιργίλιος, Οβίδιος)
Creators: name: Κουτσονίκου, Θεοδώρα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Οδυσσέας
Αυγούστεια ποίηση
Ρωμαίοι συγγραφείς
Odysseus
Augustan poetry
Roman authors

description: Η παρούσα μελέτη αποτελεί μια προσπάθεια να μελετηθεί με ποιόν τρόπο οι Ρωμαίοι συγγραφείς προσέλαβαν από τους Έλληνες προκατόχους τους τις μυθικές παραδόσεις που αφορούσαν τον ήρωα Οδυσσέα και πώς επέλεξαν να τις αξιοποιήσουν στο πλαίσιο της δημιουργίας της δικής τους λογοτεχνικής παραγωγής. Η εξέταση ξεκινάει με την πρώτη παρουσία του Οδυσσέα (Ulixes) στη λογοτεχνική παραγωγή της respublica και το επικό ποίημα Odusia του Λίβιου Ανδρόνικου, που αποτελεί το εναρκτήριο έργο της λατινικής λογοτεχνίας. Εξετάζονται ακόμη εν συντομία σκηνές από τις κωμωδίες του Πλαύτου, στις οποίες ο Οδυσσέας χρησιμοποιείται ως πρότυπο για την απεικόνιση του πανούργου δούλου (servus callidus), αλλά και οι ευκαιριακές αναφορές στον ήρωα στα έργα του Κικέρωνα, ο οποίος ενδιαφέρθηκε για τη φιλοσοφική διάσταση της δράσης του. Το κύριο μέρος της μελέτης καταλαμβάνει η εξέταση του τρόπου παρουσίασης του Οδυσσέα στο έργο των τριών μεγάλων ποιητών της αυγούστειας περιόδου, του Ορατίου, του Βιργιλίου και του Οβιδίου. Η χρήση του ομηρικού ήρωα ως πρότυπης μορφής σε ορισμένα από τα σημαντικότερα έργα της ρωμαϊκής λογοτεχνίας, αποδεικνύει εντέλει όχι μόνο την έντονη επίδραση που άσκησε η δράση και η προσωπικότητα του Οδυσσέα στους Ρωμαίους συγγραφείς διαχρονικά, αλλά και τον πολυδιάστατο λογοτεχνικό χαρακτήρα του ήρωα, ο οποίος μπορούσε να αξιοποιηθεί με επιτυχία σε κείμενα που εξυπηρετούσαν ακόμη και διαφορετικούς μεταξύ τους σκοπούς.
description: The present study is an attempt to examine in which way Roman authors accept from their Greek predecessors the mythical traditions of the hero Odysseus, and how they chose to use them in order to create their own literary production. The study begins with the first appearance of Odysseus (Ulysses) in the literary production of respublica and the epic poem Odusia by Livius Andronicus, which is the inaugural work of Latin literature. We also examine briefly scenes from Plautus’ comedies, in which Odysseus is used as a model for the depiction of the cunning slave (servus callidus), as well as occasional references to the hero in Cicero's works, who was interested in the philosophical dimension of Odysseus’ action. The main part of this essay takes the examination of how the three great poets of the Augustan period, Horace, Vιrgil and Ovid, chose to present Odysseus in their works. The use of the Homeric hero as a prototype form in some of the most important works of Roman literature proves ultimately not only the intense influence of Odysseus' action and personality on Roman writers over time, but also the multi-dimensional character of the hero who could be used successfully in texts that served even different purposes.
The Intrinsically X-ray Weak Quasar PHL 1811. I. X-ray Observations and Spectral Energy Distribution
Creators: name: Leighly, Karen M.
name: Halpern, Jules P.
name: Jenkins, Edward B.
name: Grupe, Dirk
name: Choi, Jiehae
name: Prescott, Kimberly B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the first of two papers reporting observations and analysis of the unusually bright (m_b=14.4), luminous (M_B=-25.5), nearby (z=0.192) narrow-line quasar PHL 1811, focusing on the X-ray properties and the spectral energy distribution. Two Chandra observations reveal a weak X-ray source with a steep spectrum. Variability by a factor of 4 between the two observations separated by 12 days suggest that the X-rays are not scattered emission. The XMM-Newton spectra are modelled in the 0.3--5 keV band by a steep power law with Γ= 2.3\pm 0.1, and the upper limit on intrinsic absorption is 8.7 x 10^{20} cm^{-2}. The spectral slopes are consistent with power law indices commonly observed in NLS1s, and it appears that we observe the central engine X-rays directly. Including two recent Swift ToO snapshots, a factor of ~5 variability was observed among the five X-ray observations reported here. In contrast, the UV photometry obtained by the XMM-Newton OM and Swift UVOT, and the HST spectrum reveal no significant UV variability. The α_{ox} inferred from the Chandra and contemporaneous HST spectrum is -2.3 \pm 0.1, significantly steeper than observed from other quasars of the same optical luminosity. The steep, canonical X-ray spectra, lack of absorption, and significant X-ray variability lead us to conclude that PHL 1811 is intrinsically X-ray weak. We also discuss an accretion disk model, and the host galaxy of PHL 1811.
description: 45 pages, 9 figures, accepted for publication in ApJ
FaSTrack: a Modular Framework for Real-Time Motion Planning and Guaranteed Safe Tracking
Creators: name: Chen, Mo
name: Herbert, Sylvia L.
name: Hu, Haimin
name: Pu, Ye
name: Fisac, Jaime F.
name: Bansal, Somil
name: Han, SooJean
name: Tomlin, Claire J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Real-time, guaranteed safe trajectory planning is vital for navigation in unknown environments. However, real-time navigation algorithms typically sacrifice robustness for computation speed. Alternatively, provably safe trajectory planning tends to be too computationally intensive for real-time replanning. We propose FaSTrack, Fast and Safe Tracking, a framework that achieves both real-time replanning and guaranteed safety. In this framework, real-time computation is achieved by allowing any trajectory planner to use a simplified \textit{planning model} of the system. The plan is tracked by the system, represented by a more realistic, higher-dimensional \textit{tracking model}. We precompute the tracking error bound (TEB) due to mismatch between the two models and due to external disturbances. We also obtain the corresponding tracking controller used to stay within the TEB. The precomputation does not require prior knowledge of the environment. We demonstrate FaSTrack using Hamilton-Jacobi reachability for precomputation and three different real-time trajectory planners with three different tracking-planning model pairs.
description: Published in the IEEE Transactions on Automatic Control
Texto: O morcego
Creators: name: Mỹky, Janãi
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Deitado na rede, Janãi conta a história do morcego em língua mỹky.
Lying down in his hammock, Janãi tells the myth of the bat in Mỹky.
Effect of Blue Component Stars in Parameters of NGC 6866
Creators: name: Joshi, Gireesh C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The open star clusters (OSC) are important tracers for understanding the Galactic evolution. The parametric study of these astronomical-objects is crucial task due to the appearing sequence of the members of OSC. These members are defined through the various approaches such as photometric, statistical, kinematics etc. In the present paper, we have been using the photometric colours of the identified stars for categorized them into the blue and red component groups and identification of these groups is possible through (B-V) vs V colour magnitude diagram (CMD). Furthermore, the influence/effect of these groups is also examined in the estimation of cluster parameters. The stellar enhancement of cluster NGC 6866 is found through the blue-component-stars (BCS) and the linear solution of best fitted values of King Models of the radial-densityprofile (RDP) gives the core radius as 5.22+/-0.29 arcmin. The good agreement of present estimated parameters of the cluster with the literature seems to be an effective evidence to consider BCS as the true representative of the cluster. The stellar distribution of the cluster shows continuous phenomena of the mass segregation. An effect of the incompleteness of photometric data is related to the mass-function slope values, which is found to be -3.80+/-0.11 and also shows the incremental nature with the incompleteness.
description: 08 pages, 12 figures, 02 tables, multidisciplinary conference
"Waterfalls" in cuprates
Creators: name: Kordyuk, A. A.
name: Borisenko, S. V.
name: Inosov, D.
name: Zabolotnyy, V. B.
name: Fink, J.
name: Buechner, B.
name: Follath, R.
name: Hinkov, V.
name: Keimer, B.
name: Berger, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: New hot topic in ARPES on HTSC, the observation of the so called "waterfalls", is addressed. The energy scale at about 0.2-0.3 eV that can be derived from the coherent component of ARPES spectra measured along the nodal direction is not new but has been already discussed in terms of a coupling to a bosonic continuum. However, the waterfalls, namely the long vertical parts of the experimental dispersion around the center of the Brillouin zone (BZ), seem to be purely artificial. They are a consequence of simple matrix-element effect: a complete suppression of the photoemission intensity from both the coherent and "incoherent" components. When the matrix-elements are taken into account, the latter reveals a grid-like structure along the bonding directions in the BZ.
Calibration of the Surface Array of the Pierre Auger Observatory
Creators: name: Bertou, X.
name: Allison, P. S.
name: Bonifazi, C.
name: Bauleo, P.
name: Grunfeld, C. M.
name: Aglietta, M.
name: Arneodo, F.
name: Barnhill, D.
name: Beatty, J. J.
name: Busca, N. G.
name: Creusot, A.
name: Dornic, D.
name: Filevitch, A. Etchegoyen. A.
name: Ghia, P. L.
name: Lhenry-Yvon, I.
name: Medina, M. C.
name: Moreno, E.
name: Nitz, D.
name: Ohnuki, T.
name: Ranchon, S.
name: Salazar, H.
name: Suomijärvi, T.
name: Supanitsky, D.
name: Tripathi, A.
name: Urban, M.
name: Villasenor, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Pierre Auger Observatory is designed to study cosmic rays of the highest energies ($>10^{19}$ eV). The ground array of the Observatory will consist of 1600 water Cherenkov detectors deployed over 3000 km^2. The remoteness and large number of detectors require a robust, automatic self-calibration procedure. It relies on the measurement of the average charge collected by a photomultiplier tube from the Cherenkov light produced by a vertical and central through-going muon determined to 5 - 10% at the detector via a novel rate-based technique and to 3% precision through analysis of histograms of the charge distribution. The parameters needed for the calibration are measured every minute, allowing for an accurate determination of the signals recorded from extensive air showers produced by primary cosmic rays. The method also enables stable and uniform triggering conditions to be achieved.
description: 8 pages, 6 figures