cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Signals triggered by enteropathogenic Escherichia coli in epithelial cells
Creators: name: Foubister, Vida Joan
Publisher: name: University of British Columbia
Year: 2009

description: Enteropathogenic Escherichia coli (EPEC) is a leading cause of infantile diarrhea in developing countries. Upon attachment to cultured epithelial cells, EPEC triggers a number of eucaryotic signals including host cell protein phosphorylation and increases in intracellular calcium. These signals function to initiate cytoskeletal rearrangement and other changes in infected cells. Intracellular and extracellular calcium was shown to be involved in bacterial attachment and entry into HeLa cells. In addition the level of inositol phosphates (IPs) increased in eucaryotic cells following EPEC addition. EPEC induced release of IPs preceded actin rearrangement beneath the attached bacterium and invasion. Noninvasive EPEC mutants and tyrosine protein kinase inhibitors were used to demonstrate that the formation of IPs depends on tyrosine phosphorylation of eucaryotic cell proteins. Inhibitors of host protein tyrosine phosphatases (02)vanadate/H₂O₂ promote uptake of EPEC into HeLa cells, supporting a role for host cell tyrosine phosphorylation in EPEC invasion. Collectively, these results highlight the essential role of host cell second messengers in EPEC infection. Several EPEC loci have been identified and found to be involved in events occurring prior to invasion, including adherence, cytoskeletal rearrangements, and the activation of host cell signals. The cfm genes are necessary for the tyrosine phosphorylation of a eucaryotic protein (Hp90). A second chromosomal locus, eaeA, encodes a 94-kDa outer membrane protein (intimin) that is essential for the establishment of intimate adherence and invasion and contributes to virulence. Recently an additional locus (eaeB), which maps approximately 5 kb downstream of the eaeA gene, was identified. Mutants carrying a deletion in the eaeB gene (UMD864) were deficient for invasion and induction of actin rearrangement, and did not attach intimately to eukaryotic cells. The AeaeB mutant was also unable to activate epithelial cell signals, including tyrosine phosphorylation of Hp90 and the release of IPs. Coinfection of HeLa cells with eaeA and eaeB mutants restored all of the phenotypes associated with attaching and effacing lesion formation. These data indicate that the EaeB protein is necessary for induction of host cell signals in infected cells, and that it has a different function than the eaeA gene product, intimin.
A maximum entropy model of bounded rational decision-making with prior beliefs and market feedback
Creators: name: Evans, Benjamin Patrick
name: Prokopenko, Mikhail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Artificial Intelligence (cs.AI)
subject: Theoretical Economics (econ.TH)
subject: Physics and Society (physics.soc-ph)
subject: Computational Finance (q-fin.CP)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Bounded rationality is an important consideration stemming from the fact that agents often have limits on their processing abilities, making the assumption of perfect rationality inapplicable to many real tasks. We propose an information-theoretic approach to the inference of agent decisions under Smithian competition. The model explicitly captures the boundedness of agents (limited in their information-processing capacity) as the cost of information acquisition for expanding their prior beliefs. The expansion is measured as the Kullblack-Leibler divergence between posterior decisions and prior beliefs. When information acquisition is free, the homo economicus agent is recovered, while in cases when information acquisition becomes costly, agents instead revert to their prior beliefs. The maximum entropy principle is used to infer least-biased decisions based upon the notion of Smithian competition formalised within the Quantal Response Statistical Equilibrium framework. The incorporation of prior beliefs into such a framework allowed us to systematically explore the effects of prior beliefs on decision-making in the presence of market feedback, as well as importantly adding a temporal interpretation to the framework. We verified the proposed model using Australian housing market data, showing how the incorporation of prior knowledge alters the resulting agent decisions. Specifically, it allowed for the separation of past beliefs and utility maximisation behaviour of the agent as well as the analysis into the evolution of agent beliefs.
description: 39 pages, 15 figures
Curvature induced quantum potential on deformed surfaces
Creators: name: Atanasov, Victor
name: Dandoloff, Rossen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the effect of curvature on the behaviour of a quantum particle bound to move on a surface. For the Gaussian bump we derive and discuss the quantum potential which results in the appearance of a bound state for particles with vanishing angular momentum. The Gaussian bump provides a characteristic length for the problem. For completeness we propose an inverse problem in differential geometry, i.e. what deformed surfaces produce prescribed curvature induced quantum potentials. We solve this inverse problem in the case of rotational surfaces. We also show that there exist rotational surfaces in the form of a circular strip around the axis of symmetry which allow particles with generic angular momentum to bind.
Gereja-gereja dengan Ritus Syriak
Creators: name: Andre, Akijuwen, Jr
Publisher: name: Zenodo
Year: 2025
Subjects: Syriak Ortodoks
Ritus Syriak
Syriak Katolik
Gereja Timur
Nestorian

description: Makalah ini membahas gereja-gereja yang menggunakan Ritus Syriak, yang memiliki warisan teologi, liturgi, dan budaya yang kaya dalam tradisi Kristen Timur. Fokus utama penelitian ini adalah untuk mengeksplorasi sejarah, perkembangan teologi, dan struktur organisasi gereja-gereja seperti Gereja Syriak Ortodoks, Gereja Syriak Katolik, Gereja Maronit, dan gereja-gereja dalam tradisi Syriak lainnya. Penelitian ini mengkaji bagaimana gereja-gereja ini mempertahankan identitas teologis dan liturgis mereka dalam konteks sejarah yang penuh gejolak, termasuk perpecahan yang terjadi setelah Konsili Chalcedon dan tantangan sosial-politik yang mereka hadapi, baik di tanah asal mereka di Timur Tengah maupun dalam konteks diaspora di seluruh dunia.

Menggunakan pendekatan deskriptif-analitis, makalah ini juga membandingkan praktik liturgi dan ajaran gereja-gereja ini dengan gereja-gereja utama lainnya dalam tradisi Kristen, serta bagaimana mereka mengadaptasi diri di tengah modernisasi dan perubahan sosial yang terjadi. Hasil dari penelitian ini menunjukkan pentingnya peran Patriarkh dalam menjaga otoritas ajaran gereja dan bagaimana gereja-gereja ini beradaptasi dengan pengaruh luar tanpa mengorbankan tradisi yang sudah ada.
Σακχαρώδης Διαβήτης: μικροαγγειακές και μακροαγγειακές επιπλοκές-ιατρική, νομική και βιοηθική προσέγγιση
Creators: name: Τόζιος, Σωτήριος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Σακχαρώδης διαβήτης
Μικροαγγειακές επιπλοκές,
Δικαιώματα ασθενών με σακχαρώδη διαβήτη
Diabetes mellitus
Microvascular complications
Rights of patients with diabetes

description: Ο σκοπός της παρούσας εργασίας είναι η παρουσίαση των μικροαγγειακών και μακροαγγειακών επιπλοκών που δημιουργούνται από τη νόσο του σακχαρώδη διαβήτη από την ιατρική, νομική και βιοηθική σκοπιά. Πιο συγκεκριμένα, στο πρώτο κεφάλαιο παρουσιάζονται γενικά στοιχεία για το σακχαρώδη διαβήτη κάνοντας μια ιστορική αναδρομή και διατυπώνοντας τον ορισμό της νόσου. Παράλληλα, παρουσιάζονται επιμέρους στοιχεία του σακχαρώδη διαβήτη όπως η ταξινόμηση της νόσου, επιδημιολογικά στοιχεία, τα κυριότερα συμπτώματα και τα διαγνωστικά κριτήρια της νόσου. Στο δεύτερο κεφάλαιο παρουσιάζονται οι μικροαγγειακές και μακροαγγειακές επιπλοκές του σακχαρώδη διαβήτη και γίνεται επιμέρους ανάλυση τους ανά συστήματα. Στο τρίτο κεφάλαιο γίνεται αναφορά στο χρόνιο πόνο και στη σύνδεση του με το σακχαρώδη διαβήτη. Στο τέταρτο κεφάλαιο παρουσιάζεται η νομική προσέγγιση, όπου γίνεται εκτενής αναφορά στα δικαιώματα των ατόμων με σακχαρώδη διαβήτη τύπου 1 και σακχαρώδη διαβήτη τύπου 2. Το πέμπτο κεφάλαιο πραγματεύεται το βιοηθικό προβληματισμό. Λέξεις κλειδιά: σακχαρώδης διαβήτης, μικροαγγειακές επιπλοκές, μακροαγγειακές επιπλοκές, δικαιώματα ασθενών με σακχαρώδη διαβήτη, βιοηθικός προβληματισμός.
description: The purpose of the current work is to present the microvascular and macrovascular complications caused by diabetes mellitus from a medical, legal and bioethical point of view. More specifically, the first chapter presents general data on diabetes by making a historical overview and formulating the definition of the disease. At the same time, individual elements of diabetes mellitus, such as the classification of the disease, epidemiological data, the main symptoms and the diagnostic criteria of the disease, are presented. The second chapter presents the microvascular and macrovascular complications of diabetes mellitus and analyzes them by system. In the third chapter, reference is made to chronic pain and its association with diabetes mellitus. The fourth chapter presents the legal approach, where extensive reference is made to the rights of people with type 1 diabetes and type 2 diabetes. The fifth chapter deals with bioethical reflection. Key words: diabetes mellitus, microvascular complications, macrovascular complications, rights of patients with diabetes, bioethical reflection.
Ανάπτυξη εφαρμογής Βάσεων Δεδομένων-Ψηφιακής Βιβλιοθήκης Θεολογικού Ενδιαφέροντος
Creators: name: Γκιάτα, Χρυσάνθη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ψηφιακές Βιβλιοθήκες
Κλείς Πατρολογίας
Βάσεις Δεδομένων
Digital Library
Kleis Patrologias
Database

description: Σκοπός της παρούσας εργασίας είναι κατά κύριο λόγο η κατασκευή μιας εφαρμογής βάσης δεδομένων την οποία επιλέγουμε να υλοποιήσουμε σε MS Access για κοινά ευέλικτους λόγους (ευελιξία, κοινή χρήση, κλπ.). Σύμφωνα με την εν λόγω βάση επιχειρείται η ψηφιοποίηση της συλλογής των κειμένων της Πατρολογίας Migne, δηλαδή η μεταφορά των δεδομένων της από έντυπη σε ψηφιακή μορφή. Η “Κλεις Πατρολογίας” είναι μία συλλογή κειμένων η οποία περιέχει έργα Χριστιανών Πατέρων και Εκκλησιαστικών συγγραφέων που έγραψαν στην ελληνική και λατινική γλώσσα και αναφέρεται στη χριστιανική γραμματεία των 15 πρώτων αιώνων του χριστιανισμού. Στο έργο αυτό συμπεριλαμβάνονται συγκεντρωμένα όλα τα περιεχόμενα των έργων από όπου μπορεί κανείς να αντλήσει διδάγματα θείας σοφίας. Με τη συγκεκριμένη εφαρμογή ο χρήστης θα έχει τη δυνατότητα να αντλεί άμεσα όλες τις πληροφορίες που είναι σχετικές με τις συλλογές των κειμένων
description: The aim of the present thesis in the first place is the manufacture of application of database which we try to materialize in MS Access for flexible reasons (flexibility, common use, etc.) According to the base is attempted the digitalization of collection of texts of Patrologia Migne, the transport of the data from printed in digital form. “Kleis Patrologias” is a collection of texts which contains projects of Christian Fathers and Ecclesiastical writers that they wrote in the Greek and Latin language and are reported the Christian secretariat of the first 15 centuries of Christianity. In this thesis are included all the contents of these projects from where can someone has access to these teachings of divine wisdom. With the particular application the user will have the possibility of drawing immediately all the information about the texts
Οι Ειδικοί Λογαριασμοί Κονδυλίων Έρευνας των Α.Ε.Ι. μετά τον ν.4485/2017 – Το νέο δημοσιονομικό πλαίσιο λειτουργίας τους
Creators: name: Κυριάκου, Ηλιάνα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Λογαριασμοί
Έρευνα
Ανώτατα Εκπαιδευτικά Ιδρύματα
Accounts
Research
Higher Education Institutions

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη και παρουσίαση του νέου θεσμικού πλαισίου που διέπει τους Ειδικούς Λογαριασμούς Κονδυλίων Έρευνας (ΕΛΚΕ) των ΑΕΙ μετά τη θέση σε ισχύ του ν.4485/2017. Ειδικότερα οι ΕΛΚΕ των ΑΕΙ εντάχθηκαν με το νόμο αυτό στο δημόσιο λογιστικό που διέπει εν γένει τους Φορείς Γενικής Κυβέρνησης, παραμετροποιημένο όμως σύμφωνα με τις ιδιαιτερότητες που παρουσιάζει η φύση και ο σκοπός τους. Στην εργασία παρουσιάστηκαν αναλυτικά η ιστορική εξέλιξη του θεσμού των ΕΛΚΕ, το νέο θεσμικό πλαίσιο λειτουργίας τους, τα όργανα διοίκησης και διαχείρισης, η διαχειριστική και οικονομική λειτουργία τους καθώς και οι οικονομικοί έλεγχοι στους οποίους υπόκεινται.
description: The aim of the present thesis was the study and presentation of the new legal framework which governs the Special Accounts for Research Funds (ELKE) of the Higher Education Institutions under law 4485/2017. In particular, by means of the above mentioned law, the Special Accounts for Research Funds of the Higher Education Institutions joined the public accounting, which governs all the General Government Institutions. However, this public accounting framework was parameterized to specific features which emanate from the special nature and aim of ELKE. We presented in detail the historic development of ELKE, the new institutional framework of their function, the administration and management bodies, the financial and management function as well as the financial audits to which they are subjected.
Effective Potential and Thermodynamics for a Coupled Two-Field Bose Gas Model
Creators: name: Pinto, Marcus Benghi
name: Ramos, Rudnei O.
name: Cruz, Frederico F. de Souza
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the thermodynamics of a two-species homogeneous and dilute Bose gas that is self-interacting and quadratically coupled to each other. We make use of field theoretical functional integral techniques and evaluate the one-loop finite temperature effective potential for this system considering the resummation of the leading order temperature dependent as well as infrared contributions. The symmetry breaking pattern associated to the model is then studied by considering different values of self and inter-species couplings. We pay special attention to the eventual appearance of reentrant phases and/or shifts in the observed critical temperatures as compared to the monoatomic (one-field Bose) case.
description: 21 pages, 4 eps figures
Το δικαίωμα στη φορητότητα δεδομένων
Creators: name: Σαββίδης, Νικόλαος Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Δικαίωμα
Φορητότητα
Δεδομένα
Right
Portability
Data

description: Σκοπός της παρούσας διατριβής ήταν η παρουσίαση του νέου δικαιώματος στη φορητότητα των δεδομένων προσωπικού χαρακτήρα, το οποίο αποτελεί καινοτομία του Γενικού Κανονισμού 2016/679/ΕΕ για την προστασία των φυσικών προσώπων έναντι της επεξεργασίας των δεδομένων προσωπικού χαρακτήρα και την ελεύθερη κυκλοφορία των δεδομένων αυτών, που τέθηκε σε ισχύ τον Μάιο του 2018. Αρχικά εξετάσαμε το περιεχόμενο του νέου αυτού δικαιώματος και τις προϋποθέσεις υπό τις οποίες είναι δυνατή η εφαρμογή του. Ακόμη παρουσιάσαμε αναλυτικά τις υποχρεώσεις των υπευθύνων επεξεργασίας απέναντι στα υποκείμενα των δεδομένων, καθώς και τη διαδικασία εξέτασης του αιτήματος των τελευταίων για την παροχή των δεδομένων τους. Τέλος, μας απασχόλησε και ο τρόπος παροχής των δεδομένων από τους υπεύθυνους επεξεργασίας (τα χρησιμοποιούμενα μέσα, ο απαιτούμενος μορφότυπος κλπ.).
description: The aim of the present thesis was to present the new right to the portability of personal data, which is an innovation of General Regulation 2016/679 / EU on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, which took effect in May 2018. Initially, were examined the content of this new right and the conditions under which it can be implemented (Lawful processing). Furthermore, we analyzed in detail the obligations of the data controllers and data processors, as well as the process of examining a data portability request. Lastly, we are also concerned with the way data is provided by the controllers (the means used, the required format, etc.).
Fermi-GBM Observations of the SGR J1935+2154 Burst Forest
Creators: name: Kaneko, Yuki
name: Gogus, Ersin
name: Baring, Matthew G.
name: Kouveliotou, Chryssa
name: Lin, Lin
name: Roberts, Oliver J.
name: van der Horst, Alexander J.
name: Younes, George
name: Keskin, Ozge
name: Coban, Omer Faruk
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: During 2020 April and May, SGR J1935+2154 emitted hundreds of short bursts and became one of the most prolific transient magnetars. At the onset of the active bursting period, a 130 s burst "forest," which included some bursts with peculiar time profiles, were observed with the Fermi/Gamma-ray Burst Monitor (GBM). In this Letter, we present the results of time-resolved spectral analysis of this burst "forest" episode, which occurred on 2020 April 27. We identify thermal spectral components prevalent during the entire 130 s episode; high-energy maxima appear during the photon flux peaks, which are modulated by the spin period of the source. Moreover, the evolution of the $νF_ν$ spectral hardness (represented by $E_{\rm peak}$ or blackbody temperature) within the lightcurve peaks is anti-correlated with the pulse phases extrapolated from the pulsation observed within the persistent soft X-ray emission of the source six hours later. Throughout the episode, the emitting area of the high-energy (hotter) component is 1-2 orders of magnitude smaller than that for the low-energy component. We interpret this with a geometrical viewing angle scenario, inferring that the high-energy component likely originates from a low-altitude hotspot located within closed toroidal magnetic field lines.
description: 23 pages, 8 figures, 1 table (machine-readable table provided separately), Matches the published version
Πρόβλεψη βαθμού κρισιμότητας ευπαθειών λογισμικού με τη χρήση της περιγραφής τους
Creators: name: Ραπτόπουλος, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ευπάθειες
Λογισμικό
Παλινδρόμηση
Vulnerabilities
Software
Regression

description: Αντικείμενο της παρούσας εργασίας είναι η μελέτη των ευπαθειών λογισμικού και η εκτίμηση της σοβαρότητας και της κρισιμότητας αυτών. Οι ευπάθειες λογισμικού είναι άρρηκτα συνδεδεμένες με την ασφάλεια των πληροφοριακών συστημάτων και αποτελούν ένα εξαιρετικά μεγάλο κίνδυνο, όσον αφορά θέματα τεχνολογίας, οικονομίας αλλά και καθημερινότητας. Σκοπός της εργασίας είναι η ανάπτυξη ενός συστήματος βαθμολόγησης της κρισιμότητας των ευπαθειών των πληροφοριακών συστημάτων. Το σύστημα έχει ως στόχο την πρόβλεψη του βαθμού της κρισιμότητας μιας ευπάθειας λογισμικού, στην κλίμακα από 0 έως 10, χρησιμοποιώντας την περιγραφή που τη συνοδεύει και συγκεκριμένα τις λέξεις που περιέχονται σε αυτή. Αυτό επιχειρήθηκε να υλοποιηθεί με τη χρήση του μοντέλου της Λογιστικής Παλινδρόμησης Ποσοστημορίων.
description: Object of present thesis is the study of software vulnerabilities and the estimation of their severity and criticality. Software vulnerabilities are inseparably linked to the security of information systems and pose a great risk to technology, economy and everyday life. The aim of the thesis is to develop a system for assessing the criticality of the vulnerabilities of information systems. The system aims to predict the score of criticality of a software vulnerability, on a scale of 0 to 10, using the description that accompanies it and, in particular, the words contained therein. This has been attempted through the use of the Logistic Quantile Regression.
On the equivalence of Reggeon field theory in zero transverse dimensions and reaction-diffusion processes
Creators: name: Bondarenko, S.
name: Motyka, L.
name: Mueller, A. H.
name: Shoshi, A. I.
name: Xiao, B. -W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Reggeon field theory in zero transverse dimensions is investigated. Two versions of the theory are considered: one that allows at most triple pomeron interactions and the other that embodies an additional 2-->2 quartic Reggeon coupling. The behavior of the scattering amplitude at asymptotic rapidities is obtained in both cases. In an s-channel picture of the high energy scattering both models can be viewed as reaction-diffusion processes. We derive known results in Reggeon field theory rather easily using the reaction-diffusion formalism. We find that some results which are surprising from the Reggeon field theory point of view turn out to have a simple interpretation from the reaction-diffusion point of view.
description: 19 pages, no figures
Waveless Approximation Theories of Gravity
Creators: name: Isenberg, James A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The analysis of a general multibody physical system governed by Einstein's equations in quite difficult, even if numerical methods (on a computer) are used. Some of the difficulties -- many coupled degrees of freedom, dynamic instability -- are associated with the presence of gravitational waves. We have developed a number of ``waveless approximation theories'' (WAT) which repress the gravitational radiation and thereby simplify the analysis. The matter, according to these theories, evolves dynamically. The gravitational field, however, is determined at each time step by a set of elliptic equations with matter sources. There is reason to believe that for many physical systems, the WAT-generated system evolution is a very accurate approximation to that generated by the full Einstein theory.
title: DRIVING BUSINESS TOWARDS SUSTAINABLE SUCCESS: THE ROLE OF CORPORATE GOVERNANCE WITH ENVIRONMENTAL AND SOCIAL MANAGEMENT AS MEDIATORS
Creators: name: Thanomsilp JANKANAKITTIKUL
Publisher: name: Asian Administration and Management Review
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Corporate Governance
Environmental Management
Social Management
Business Performance
Sustainability

description: Asian Administration and Management Review, 8, 1, Article 21
Effects of flares on solar high-degree helioseismic acoustic mode amplitudes
Creators: name: Soares, M. Cristina Rabello
name: Baudin, Frédéric
name: Teixeira, Vanessa G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Several attempts have been made to observe whether solar flares excite acoustic modes since Charles Wolff suggested this possibility almost fifty years ago. We look for the impact of flares on the amplitude of solar acoustic modes and other effects that are also affecting the mode amplitude. Solar acoustic mode amplitudes are known to be sensitive to magnetic fields. As flares usually occur in the presence of strong magnetic fields and most likely are the by-product of magnetic reconnection, we show how the magnetic field in and around the flaring region affects the mode amplitude. The mode amplitudes were obtained using ring-diagram analysis, which was first applied to a single event, the largest flare in the space age (the `Halloween Flare', SOL2003-10-28T11:00), using MDI data. Then, using HMI data, the analysis was applied to the regions corresponding to the flares observed during the high activity phase of cycle 24 and that fall into two groups. These two groups consist of small (10-60 erg/cm^2/s) and large (>1200 erg/cm^2/s) peak-flux flares, based on the Heliophysics Event Knowledgebase (HEK). The first set is used as a comparison to the results of the strong flares in the second set. After applying several corrections in order to take into account several sources of bias, we did not find any amplification in the inferred mode amplitude due to flaring activity larger than a 10% uncertainty.
description: Accepted: MNRAS
Selective Excitation of Subwavelength Atomic Clouds
Creators: name: Alaee, Rasoul
name: Safari, Akbar
name: Boyd, Robert W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A dense cloud of atoms with randomly changing positions exhibits coherent and incoherent scattering. We show that an atomic cloud of subwavelength dimensions can be modeled as a single scatterer where both coherent and incoherent components of the scattered photons can be fully explained based on effective multipole moments. This model allows us to arrive at a relation between the coherent and incoherent components of scattering based on the conservation of energy. Furthermore, using superposition of four plane waves, we show that one can selectively excite different multipole moments and thus tailor the scattering of the atomic cloud to control the cooperative shift, resonance linewidth, and the radiation pattern. Our approach provides a new insight into the scattering phenomena in atomic ensembles and opens a pathway towards controlling scattering for applications such as generation and manipulation of single-photon states.
description: 14 pages, 4 figures
Measurement of the DA$Φ$NE luminosity with the KLOE detector using large angle Bhabha scattering
Creators: name: KLOE Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We describe the method of measuring the integrated luminosity of the $e^+e^-$ collider DA$Φ$NE, the Frascati $ϕ-$factory. The measurement is done with the KLOE detector selecting large angle Bhabha scattering events and normalizing them to the effective cross section. The $e^+e^- \to e^+e^-(γ)$ cross section is calculated using different event generators which account for the $O(α)$ radiative initial and final state corrections, and the $ϕ$ resonance contribution. The accuracy of the measurement is 0.6%, where 0.3% comes from systematic errors related to the event counting and 0.5% from theoretical evaluations of the cross section.
description: Submitted to Eur. Phys. J. C
Atomic detection in microwave cavity experiments: a dynamical model
Creators: name: Rossi, R.
name: Nemes, M. C.
name: de Faria, J. G. Peixoto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct a model for the detection of one atom maser in the context of cavity Quantum Electrodynamics (QED) used to study coherence properties of superpositions of electromagnetic modes. Analytic expressions for the atomic ionization are obtained, considering the imperfections of the measurement process due to the probabilistic nature of the interactions between the ionization field and the atoms. Limited efficiency and false counting rates are considered in a dynamical context, and consequent results on the information about the state of the cavity modes are obtained.
description: 12 pages, 1 figure
Fractional generalized cumulative entropy and its dynamic version
Creators: name: Di Crescenzo, Antonio
name: Kayal, Suchandan
name: Meoli, Alessandra
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Information Theory (cs.IT)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Following the theory of information measures based on the cumulative distribution function, we propose the fractional generalized cumulative entropy, and its dynamic version. These entropies are particularly suitable to deal with distributions satisfying the proportional reversed hazard model. We study the connection with fractional integrals, and some bounds and comparisons based on stochastic orderings, that allow to show that the proposed measure is actually a variability measure. The investigation also involves various notions of reliability theory, since the considered dynamic measure is a suitable extension of the mean inactivity time. We also introduce the empirical generalized fractional cumulative entropy as a non-parametric estimator of the new measure. It is shown that the empirical measure converges to the proposed notion almost surely. Then, we address the stability of the empirical measure and provide an example of application to real data. Finally, a central limit theorem is established under the exponential distribution.
description: 25 pages, 8 figures, accepted for publication on Communications in Nonlinear Science and Numerical Simulation
Οι στάσεις των εκπαιδευτικών απέναντι στα ρομπότ και την χρήση τους στην εκπαίδευση
Creators: name: Φιλιππίδη, Νίνα Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ρομπότ
Εκπαιδευτική ρομποτική
Εκπαιδευτικοί πρωτοβάθμιας εκπαίδευσης
Robot
Educational robotics
Teachers

description: Οι εξελίξεις στον τομέα της τεχνολογίας τρέχουν με ραγδαίους ρυθμούς και φυσικά δε θα μπορούσαν να αφήσουν άθικτο το τομέα της εκπαίδευσης. Τα τελευταία χρόνια τα ρομπότ παίζουν ενεργό ρόλο μέσα στην εκπαιδευτική διαδικασία ως εκπαιδευτικά εργαλεία κυρίως πάνω στον τομέα των φυσικών επιστημών και των τεχνολογιών. Ο τρόπος με τον οποίο όμως χρησιμοποιούνται και το αποτέλεσμα αυτής της χρήσης εξαρτάται από τη στάση που τηρούν οι εκπαιδευτικοί απέναντι σε αυτά τα διδακτικά εργαλεία και περεταίρω τι μαθησιακά αποτελέσματα έχει πάνω στα παιδιά. Στη παρούσα εργασία γίνεται διερεύνηση των στάσεων των εκπαιδευτικών πρωτοβάθμιας εκπαίδευσης απέναντι στα ρομπότ και των αντιλήψεων τους απέναντι στην εκπαιδευτική ρομποτική. Τα αποτελέσματα της έρευνας δείχνουν ότι οι στάσεις των εκπαιδευτικών απέναντι στα ρομπότ επηρεάζεται από την ευχέρεια με την οποία μπορούν να χειριστούν τα ρομπότ στην εκπαιδευτική διαδικασία και από το αποτέλεσμα που έχει η χρήση αυτών στις γνώσεις και δεξιότητες των μαθητών τους.
description: Technological developments are running at a rapid pace, and of course they could not leave the field of education intact. In recent years, robots have been playing an active role in the educational process as educational tools, particularly in the field of sciences and technologies. However, the way in which the outcome of this use is used depends on the teachers' attitude towards these teaching tools and further on what the learning outcomes have on children. This paper explores the attitudes of primary school teachers towards robots and their attitudes towards educational robotics. The results of the research show that teachers' attitudes towards robots are affected by their ability to handle the robots in the educational process and the effect their use has on the knowledge and skills of their pupils.
Secret Broadcasting of W-type state
Creators: name: Chakrabarty, Indranil
name: Choudhury, B. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we describe a protocol by which one can secretly broadcast W-type state among three distant partners. This work is interesting in the sense that we introduce a new kind of local cloning operation to generate two W- type states between these partners from a W-type state initially shared by them.
description: Accepted in International Journal of Quantum Information (IJQI)
Αλγεβρικές σειρές με τιμές σε διμονοειδή
Creators: name: Τορπάρη, Φαίδρα Σωτηρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αλγεβρικές σειρές
Αλγεβρικές γραμματικές με βάρη
Διμονοειδή
Context-free series
Weighted context-free grammars
Bimonoids

description: Σε αυτή την διπλωματική εργασία εισάγουμε και διερευνούμε αλγεβρικές γραμματικές με βάρη σε διμονοειδή με αριστερό πολλαπλασιαστικό-μηδέν. Αποδεικνύουμε ότι κάθε αλγεβρική γραμματική με βάρη σε διμονοειδή μπορεί να μετασχηματιστεί σε μια ισοδύναμη γραμματική η οποία θα είναι στην γενικευμένη κανονική μορφή Chomsky. Έπειτα, δείχνουμε ότι το Θεώρημα Chomsky-Schutzenberger ισχύει τροποποιημένο για τις σειρές που παράγονται από τις γραμματικές μας. Επιπλέον, αποδεικνύουμε ότι μια σειρά προέρχεται από μία δεξιά-γραμμική αλγεβρική γραμματική με βάρη αν και μόνο αν αυτή αναγνωρίζεται από ένα αυτόματο με βάρη στο ίδιο διμονοειδές. Επίσης, δείχνουμε ιδιότητες κλειστότητας των αλγεβρικών σειρών μας.
description: We introduce and investigate weighted context-free grammars over bimonoids with a multiplicative-zero only from the left. We show that every weighted context-free grammar over such a weight structure can be transformed to an equivalent one in generalized Chomsky normal form. Furthermore, a Chomsky-Schutzenberger type result holds for the series produced by our grammars. Also, we prove that every recognizable series over a bimonoid can be generated from a right-linear weighted context-free grammar over the same bimonoid and vice versa. We prove also several closure properies of our series.
title: A COMPARATIVE ANALYSIS OF DIGITAL MARKETING STRATEGIES AND BRAND SUCCESS: THE CASE OF LEADING THAI UNDER-300CC MOTORBIKE BRANDS
Creators: name: Watcharapong TUNPORNCHAI
Publisher: name: Asian Administration and Management Review
publisherIdentifierScheme: ROR
Year: 2025
Subjects: Digital Marketing Strategies
4Es Framework
Brand Attitude
Purchase Intention
Thai Motorbike Market

description: Asian Administration and Management Review, 8, 1, Article 22
Luttinger liquids with curvature: Density correlations and Coulomb drag effect
Creators: name: Aristov, D. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider the effect of the curvature in fermionic dispersion on the observable properties of Luttinger liquid (LL). We use the bosonization technique where the curvature is irrelevant perturbation, describing the decay of LL bosons (plasmon modes). When possible, we establish the correspondence between the bosonization and the fermionic approach. We analyze modifications in density correlation functions due to curvature at finite temperatures, T. The most important application of our approach is the analysis of the Coulomb drag by small momentum transfer between two LL, which is only possible due to curvature. Analyzing the a.c. transconductivity in the one-dimensional drag setup, we confirm the results by Pustilnik et al. for T-dependence of drag resistivity, R_{12} ~ T^2 at high and R_{12} ~ T^5 at low temperatures. The bosonization allows for treating both intra- and inter-wire electron-electron interactions in all orders, and we calculate exact prefactors in low-T drag regime. The crossover temperature between the two regimes is T_1 ~ E_F Δ, with Δrelative difference in plasmon velocities. We show that Δ\neq 0 even for identical wires, due to lifting of degeneracy by interwire interaction, U_{12}, leading to crossover from R_{12} ~ U_{12}^2 T^2 to R_{12} \~ T^5/U_{12} at T ~ U_{12}.
description: 16 pages, 10 figures, REVTEX
Σύνθεση και Μελέτη Υλικών για εφαρμογές μονίμων μαγνητών
Creators: name: Τσιταμπάνης, Αθανάσιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μαγνήτες τύπου 1:12
Δομή RFe10Si2
Φερρίτες
Magnet structure 1:12
Structure RFe10Si2
Ferrites

description: Η απόφαση για τη συγγραφή της παρούσας διπλωματικής πάρθηκε, ύστερα από αρκετή σκέψη γύρω από την ολοένα και διαρκώς αυξανόμενη διείσδυση της χρήσης μονίμων μαγνητών στην καθημερινότητα και ως στόχο έχει να μελετήσει νέα μαγνητικά υλικά στο πεδίο αυτό. Ο σκοπός της διπλωματικής αυτής εργασίας είναι διττός: η σύνθεση αλλά και ο χαρακτηρισμός υλικών για εφαρμογές σε μόνιμους μαγνήτες, που εντάσσονται στο ευρύτερο πεδίο του Ηλεκτρολόγου Μηχανικού και κυρίως έχουν εφαρμογή στους κινητήρες και στις Ανεμογεννήτριες. Η διπλωματική είναι χωρισμένη σε δύο κύρια μέρη και σε καθένα από αυτά εξετάζονται οι μέθοδοι σύνθεσης και οι ιδιότητες των διαμεταλλικών ενώσεων σπανίων γαιών με μέταλλα καθώς και των φερριτών. Αρχικά σε θεωρητικό επίπεδο και κατόπιν σε πειραματικό. Για την επεξεργασία των δεδομένων των εργαστηριακών πειραμάτων έγινε νόμιμη χρήση των προγραμμάτων powdercell 2.4, Origin Pro.8 και Micrοsoft Excel. Τέλος, έγιναν μετρήσεις των μαγνητικών ιδιοτήτων των φερριτικών μαγνητικών υλικών και παρουσιάζονται τα συμπεράσματα για τη χρήση που μπορεί να έχουν.
description: The decision for writing this thesis, entitled “Synthesis and Study of materials for applications in permanent magnets”, was made after much thought and careful consideration about the ever increasing usage of permanent magnets in everyday life’s applications, so the aim is to discover new materials in this field. The purpose of this diploma thesis is double: the synthesis and the characterization of materials for applications in permanent magnets, which belong to the wider field of Electrical Engineering mainly used in motors and wind turbines. The diploma thesis is divided into two main parts, each of them examines the methods of synthesis and the properties of the rare earth intermetallic compounds with metals as well as the ferrites. At the beginning each of them there is a theoretical introduction which is followed by the experimental process. The softwares used to process the data from the experiments are: PowderCell 2.4, Origin Pro.8 and Microsoft Excel (legal use). Finally, there is a presentation of the measurements of the magnetic properties of ferrites. Also, there are conclusions for their use.
Ground State Quarkonium Spectral Functions Above Deconfinement
Creators: name: Mocsy, Agnes
name: Petreczky, Peter
name: Casalderrey-Solana, Jorge
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the temperature-dependence of S-wave quarkonium spectral functions in a nonrelativistic Green's function approach and compare these to lattice QCD results.
description: Contribution to proceedings of "Strong and Electroweak Matter 2006", Brookhaven, NY, May 2006 and "Hard Probes 2006" Asilomar, CA, June 2006
Point-Defect-Localized Bound States in the Continuum in Photonic Crystals and Structured Fibers
Creators: name: Vaidya, Sachin
name: Benalcazar, Wladimir A.
name: Cerjan, Alexander
name: Rechtsman, Mikael C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We show that point defects in two-dimensional photonic crystals can support bound states in the continuum (BICs). The mechanism of confinement is a symmetry mismatch between the defect mode and the Bloch modes of the photonic crystal. These BICs occur in the absence of bandgaps and therefore provide an alternative mechanism to confine light. Furthermore, we show that such BICs can propagate in a fiber geometry and exhibit arbitrarily small group velocity which could serve as a platform for enhancing non-linear effects and light-matter interactions in structured fibers.
description: Manuscript is 5 pages, 3 figures. Supplementary 3 pages, 4 figures
Η Τέχνη στην Αυλή του Σελτζούκου Ηγεμόνα Αλλαεντίν Καϊκομπάντ Α΄ (1220-1237)
Creators: name: Ορφανίδης, Γεώργιος Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Σελτζούκοι
Αλλαεντίν Καϊκομπάντ Α΄
Τέχνη
Seljuks
Alâeddin Keykubad I
Art

description: Σκοπός της μεταπτυχιακής διατριβής ήταν η μελέτη των διαφόρων εκφάσεων τέχνης, όπως αναπτύχθηκαν στην Αυλή του Σελτζούκου Σουλτάνου Αλλαεντίν Καϊκομπάντ Α΄ (1220-1237), με έμφαση στην παρουσίαση των αντίστοιχων αρχιτεκτονικών μνημείων. Πιο συγκεκριμένα, ειδικότερο αντικείμενο του οικείου εκπονήματος αποτελούν οι κάτωθι θεματικοί άξονες: α) η Γενική Τοπογραφία-Πολεοδομική Οργάνωση συνοδευόμενη από την εκάστοτε Οχυρωματική-Αμυντική Οικοδομική Δραστηριότητα, β) η Αρχιτεκτονική των Ανακτορικών Συγκροτημάτων, γ) η Αρχιτεκτονική των Θρησκευτικών Συγκροτημάτων, και δ) η συμβολή της Γλυπτικής και της Κεραμικής. Ακόμα, συζητήθηκαν, όπου κρίθηκε απαραίτητο, ζητήματα Αυλικής ιδεολογίας, μυθολογίας και θρησκευτικών πεποιθήσεων της ευρύτερης γεωγραφικής ζώνης της Ανατολίας, προκειμένου να ερμηνευθούν με τον βέλτιστο τρόπο οι εκάστοτε επιλογές αρχιτεκτονικής.
description: The purpose of the postgraduate dissertation was the study of the various artworks as developed in the Court of Seljuk Sultan Alâeddin Keykubad I (1220-1237), with emphasis on the presentation of the respective architectural monuments. More specifically, the specific subject of the dissertation is the following thematic axes: a) The General Topography-Urban Organization accompanied by the respective Fortification-Defense Building Activity, b) The Architecture of the Palaces; c) The Architecture of the Religious Complexes; the contribution of Sculpture and Ceramics. Furthermore, questions of the Court ideology, mythology and religious beliefs of the wider geographical area of Anatolia were discussed, where necessary, in order to interpret the architectural options in the best way.
Shadow of axisymmetric, stationary and asymptotically flat black holes in the presence of plasma
Creators: name: Badía, Javier
name: Eiroa, Ernesto F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the shadow produced by a class of rotating black holes surrounded by plasma. The metric for these black holes arises by applying the Newman-Janis algorithm to a family of spherically symmetric spacetimes, which includes several well known geometries as special cases. We derive a general expression for the shape of the shadow in the case that the plasma frequency leads to a separable Hamilton-Jacobi equation for light. We present two examples in which we obtain the shadow contours and the observables resulting from them. In one, we analyze Kerr-Newman-like geometries, including braneworld and Horndeski gravity black holes, while in the other, we consider scalar-tensor 4D Einstein-Gauss-Bonnet gravity spacetimes. In both cases, we find that the presence of plasma leads to a smaller and less deformed shadow.
description: 15 pages, 4 figures; v3: improved and extended version, new references added
Little String Theory from a Double-Scaled Matrix Model
Creators: name: Ling, Henry
name: Mohazab, Ali Reza
name: Shieh, Hsien-Hang
name: van Anders, Greg
name: Van Raamsdonk, Mark
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following Lin and Maldacena, we find exact supergravity solutions dual to a class of vacua of the plane wave matrix model by solving an electrostatics problem. These are asymptotically near-horizon D0-brane solutions with a throat associated with NS5-brane degrees of freedom. We determine the precise limit required to decouple the asymptotic geometry and leave an infinite throat solution found earlier by Lin and Maldacena, dual to Little String Theory on S^5. By matching parameters with the gauge theory, we find that this corresponds to a double scaling limit of the plane wave matrix model in which N \to \infty and the 't Hooft coupling λscales as \ln^4(N), which we speculate allows all terms in the genus expansion to contribute even at infinite N. Thus, the double-scaled matrix quantum mechanics gives a Lagrangian description of Little String Theory on S^5, or equivalently a ten-dimensional string theory with linear dilaton background.
description: 31 pages, LaTeX, 3 figures. Correction of typos in the appendices
title: E-SERVICE QUALITY AS A MEDIATOR: INFLUENCING VIDEO STREAMING ADOPTION IN THAILAND
Creators: name: Nutchapisitd AEKPHATCHARAPHAN
Publisher: name: Asian Administration and Management Review
publisherIdentifierScheme: ROR
Year: 2025
Subjects: E-Service Quality
Video Streaming
Technology Acceptance
Online User Behavior
Thailand

description: Asian Administration and Management Review, 8, 1, Article 23
Ο Ηράκλειτος και ο Πλάτωνας στην ποίηση του Γιώργου Σεφέρη
Creators: name: Ζαχαρούδη, Αγγελική Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Γ. Σεφέρης
Ποιήματα
Ηράκλειτος και Πλάτωνας
G. Seferis
Poems
Heraclitus and Plato

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη της επίδρασης που άσκησαν δύο μεγάλες μορφές της φιλοσοφικής σκέψης στα ποιήματα του Σεφέρη, ο Ηράκλειτος και ο Πλάτωνας. Οι δύο φιλόσοφοι συνόδευσαν την ποίηση του Σεφέρη με κύριο στόχο την ανάδειξη της φιλοσοφικής σκέψης του ποιητή σε εμπόλεμη περίοδο. Στα έργα του Σεφέρη αξιοποιήθηκε σε μεγάλο βαθμό η μυθική μέθοδος, καθώς ήταν ένας ποιητής που συνδύαζε την ποίηση με την φιλοσοφία. Πιο αναλυτικά, στο πρώτο κεφάλαιο πραγματοποιήθηκε εκτενής αναφορά στη φιλοσοφική επιρροή που δέχτηκε ο Γιώργος Σεφέρης από τον Ηράκλειτο προτείνοντας τρόπους, ώστε να του χαριστεί το ποίημα. Ακόμη, στο επόμενο κεφάλαιο αναζήτησα και ερμήνευσα την επικοινωνία του ποιητή με την αρχαία ελληνική παράδοση αξιοποιώντας του Πλατωνικούς λόγους, προσπαθώντας ο ποιητής να ερμηνεύσει τα προβλήματα της εποχής και να προβάλλει τις ανθρώπινες αξίες. Αναλύθηκε η ιστορική συγκυρία μέσα στην οποία συντέθηκαν τα ποιήματα και η μυθολογία αποτέλεσε θεμέλιο λίθο, για να στηριχτεί η ποίηση του Σεφέρη επιτυγχάνοντας τη σύνδεση του παρελθόντος με τον παρόν και προωθώντας την ποιητική του σοφία.
description: The aim of the present thesis is to study the effect of two great figures of philosophical thinking in the poetry of Seferis, Heraclitus and Plato. The two philosophers accompanied the poetry Seferis having as main goal the emergence of poet’s philosophical thinking in a warfare period. In the works of Seferis, the mythical method was used to a great extent, as he was a poet who combined poetry and philosophy. In more details, the first chapter is dedicated to the philosophical influence Seferis received from Heraclitus, that is the suggesting ways so that poem would be delivered to him. Furthermore, in the next chapter we surveyed and investigated the communication of the poet with the ancient greek tradition using Plato’s speeches, that is the attempt of the poet to interpret his era problems and demostrate human values. The historical circumstances, in which the poems were composed and mythology played the role of foundation stone, were analysed to argue for Seferis’ poetry accomplishment of the connection of past and present while promoting his poetic wisdom.
Constraining the Adaptive Optics Point-Spread Function in Crowded Fields: Measuring Photometric Aperture Corrections
Creators: name: Sheehy, Christopher D.
name: McCrady, Nate
name: Graham, James R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The point-spread function (PSF) of an adaptive optics (AO) system is often poorly known. This ignorance can lead to significant systematic errors in photometry. Since the degree of AO correction is sensitive to the observing conditions: seeing, wind speed, brightness of the wavefront reference, etc., it would be desirable to estimate the PSF from the data themselves. We have developed a method to estimate the PSF delivered by an AO system in the case where the scene consists of a crowded star field. We model the modulation transfer function (MTF) of several key components of the imaging system. The power spectrum of the image, even a dense star field, can then be used to constrain our model, which in turn can be used to reconstruct the PSF. We show that the method yields reasonable fit parameters and a useful approximation to the PSF when applied to data from laser guide star (LGS) AO system at the Keck Observatory. Comparison of Keck LGS/AO and HST/NICMOS data shows that photometric accuracy of a few percent can be achieved for data with Strehl ratios as low as 4%.
description: 19 pages & 14 figures. Accepted for publication in Astrophysical Journal. Based on observations obtained at the W.M. Keck Observatory