An efficient rotation circuit and its application in VLSI transform processors

Karathanasis, H.C.; Frantzeskakis, E.; Karathanasis, I.C.; Birbas, A. N.

doi:10.1109/eurmic.1994.390365

Cited by 3 publications

(17 citation statements)

References 11 publications

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“…John made several important innovations in the fields of human physiology, pharmacology, and uroscopy, including the introduction of a graduated urine vial that became extremely popular in the Renaissance West after the translation of his On Urines into Latin by Leo of Nola (1458/9-1525 in 1519. 16 A diagram of John's urine vial has been drawn in the margin of f. 54r. As in other manuscripts already mentioned, here too we can see recipes added by later hands, including one for a julep for the dissolution of kidney or bladder stones by the otherwise unknown Photios, an infirmarian (νοσοκόμος) on f. 44r.…”

Section: Figures the Wellcome Greek Collection Petros Bouras-vallianatosmentioning

confidence: 99%

“…15 It required enormous efforts from the Museum Director, E. Ashworth Underwood (1899, and his staff to reopen part of the Museum in 1946 and the Library itself in 1949, albeit in only a small portion of the lavish building that had been planned as part of a scheme that would have covered the whole block between Gordon Street and Gower Street. 16 Space was at a premium, and continued to be so even after the transfer of the Historical Museum on the second floor and the Tropical Museum in the basement.…”

Section: Vivian Nuttonmentioning

confidence: 99%

“…Overall the Anonymous refers (without mention of a source) to the full range of causes found in other Greco-Roman medical sources: qualitative changes related to heat, chill, wetness and dryness in the entire body, or in certain parts or substances; blockage or hindrance to the passage of substances such as blood or air; accumulation of blood, air or humours in locations they should not naturally be; physical trauma. In vertigo, for example, the liquids in the head and the pneuma are blocked (ἐνανείλησις); 16 in colic it is "either inflammation of the colon or stoppage of the thick pneumata in it"; 17 spasm can arise from dryness of the nerves which are thus "contracted like leather straps" and on account of "lack of tension of the pneuma" (ἀτονία πνεύματος). 18 This last reference to the tension of the pneuma and to the lack thereof (ἀτονία) as a cause of disease are interesting.…”

Section: A Range Of Causesmentioning

confidence: 99%

“…In the case of dysenteric flux he refers to the lack of tension of the innate pneuma (ἀτονία ἐμφύτου πνεύματος). 21 In the case of syncope, the pneuma loses its natural tension on account of 16 Anonymus Parisinus, On Acute and Chronic Diseases, 17, ed. Garofalo (1997) 110.6-7. 17 Anonymus Parisinus, On Acute and Chronic Diseases, 15, ed.…”

Section: A Range Of Causesmentioning

confidence: 99%

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Exploring Greek Manuscripts in the Library at Wellcome Collection in London

Bouras-Vallianatos¹

2020

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List of figures ix Preface xi Notes on contributors xii Note to the reader xv The Wellcome Greek Collection 1 PETROS BOURAS-VALLIANATOS 1 Greek manuscripts in the Library at Wellcome Collection: Owners and cataloguers 12 VIVIAN NUTTON 2 The clinical method of the anonymous of Paris 25 ORLY LEWIS 3 Wellcomensis MS.MSL.14 as a therapeutic handbook 54 BARBARA ZIPSER 4 The language of iatrosophia: A case-study of two manuscripts of the Library at Wellcome Collection (MS.4103 and MS.MSL.14) 66 TINA LENDARI AND IO MANOLESSOU 5 Jewish astronomy in Byzantium: The case of Wellcomensis MS.498 ANNE TIHON 6 Manuel Korinthios' poems in Wellcomensis MS.498 MARIA TOMADAKI

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Section: Figures the Wellcome Greek Collection Petros Bouras-vallianatosmentioning

confidence: 99%

Section: Vivian Nuttonmentioning

confidence: 99%

Section: A Range Of Causesmentioning

confidence: 99%

Section: A Range Of Causesmentioning

confidence: 99%

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Exploring Greek Manuscripts in the Library at Wellcome Collection in London

Bouras-Vallianatos¹

2020

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“…We observe that the IIR architecture consists of a feedback structure with M = 2 delay elements. The parameters di,i = 1 , 2 and n,,,i = O , l , j = 0 , 1 , 2 , 3 are given by the expressions shown in (19), at the bottom of the page.…”

Section: Iir Architecture Based On Shift Propertymentioning

confidence: 99%

Time-recursive computation and real-time parallel architectures: a framework

Frantzeskakis

Baras

Liu

1995

IEEE Trans. Signal Process.

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The time-recursive computation has been proven a particularly useful tool in real-time data compression, in transform domain adaptive filtering, and in spectrum analysis. Unlike the FFT-based ones, the time-recursive architectures require only local communication. Also, they are modular and regular, thus they are very appropriate for VLSI implementation and they allow a high degree of parallelism. In this two-part paper, we establish an architectural framework for parallel time-recursive computation. We clonsider a class of linear operators that consists of the discrete time, time invariant, compactly supported, but otherwise arbitrary kernel functions. We show that the structure of the realization of a given linear operator is dictated by the decomposition of the latter with respect to proper basis functions. An optimal way for carrying out this decomposition is demonstrated. The parametric forms of the basis functions are identified and their properties pertinent to the architecture design are studied. A library of architectural building modules capable of realizing these functions is developed. An analysis of the implementatioin complexity for the aforementioned modules is conducted. Based on this framework, the time-recursive architecture of a given h e a r operator can be derived in a systematic routine way. Since 1991, he has been the Director of the Center for Satellite and Hybrid Communication Networks, a NASA Center for the Commercial Development of Space, which he co-founded. He has numerous publications in control and communication systems, and is the co-editor of Recent Progress in Stochastic Calculus (Spnnger-Verlag, 1990). His current research interests include stochastic systems and signal processing and understandmg with emphasis on speech and image signals, real-time architectures, symbolic computation, intelligent control systems, robust nonlinear control, dxtributed parameter systems, hybnd communication network simulahon and management.

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Αλγοριθμοι Και Αρχιτεκτονικες Vlsi Για Συμπιεση Ψηφιακων Εικονων

Καραθανασησ¹

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Μέλη Εξεταστικής Επιτροπής καθ. Θ. Παπαθεοδώρου (επιβλέπων) καθ. Κ. Γκούτης αν. καθ. Σ. Κόλλιας καθ. Ε. Κυρούσης λεκ. Α. Μπίρμπας καθ. Π. Σπυράκης αν. καθ. Α. Στουραίτης Δεκέμβριος 1993 ΠΑΝΕΠΙΣΤΗΜΙΟ ΠΑΤΡΩΝ ΤΜΗΜΑ ΜΗΧΑΝΙΚΩΝ ΗΛΕΚΤΡΟΝΙΚΩΝ ΥΠΟΛΟΓΙΣΤΩΝ ΚΑΙ ΠΛΗΡΟΦΟΡΙΚΗΣ ΑΛΓΟΡΙΘΜΟΙ ΚΑΙ ΑΡΧΙΤΕΚΤΟΝΙΚΕΣ VLSI ΓΙΑ ΣΥΜΠΙΕΣΗ ΨΗΦΙΑΚΩΝ ΕΙΚΟΝΩΝ Χαράλαμπος Κ. Καραθανάσης Διδακτορική Διατριβή Μέλη Εξεταστικής-ΈΐΜχροπής καθ. Θ. Παπαθεοδώρου (επιβλέπων) καθ. Κ. Γκούτης αν. καθ. Σ. Κόλλιας καθ. Ε. Κυρούσης λεκ. Α. Μπίρμπας καθ. Π. Σπυράκης αν. καθ. Α. Στουραίτης Δεκέμβριος 1993 ΠερίληψηΣτη διατριβή αυτή εστιάζουμε την προσοχή μας σε υβριδικούς αλγορίθμους πρόβλεψης -μετασχηματισμών για συμπίεση ψηφιακών εικόνων, για τους οποίους παρουσιάζουμε βελτιώσεις όπως και αρχιτεκτονικές VLSI για την υλοποίηση τους σε συνθήκες πραγ ματικού χρόνου. Αρχικά προτείνουμε ένα αλγόριθμο βασισμένο σε περιστροφές για τον υπολογισμό του Διακριτού Μετασχηματισμού Συνημίτονου (ΔΜΣ), ο οποίος υλο ποιούμενος με τη χρήση ενός πρωτότυπου κυκλώματος περιστροφής κατανεμημένης αριθ μητικής, οδηγεί σε συνολικές απαιτήσεις ROM μικρότερες από το 10% εκείνων, άλλων γνωστών υλοποιήσεων του ΔΜΣ, για την ίδια ταχύτητα λειτουργίας. Επειτα, ασχολού μαστε με τον Διαμορφωμένο Επικαλυπτόμενο Μετασχηματισμό (ΔΕΜ), ο οποίος χρη σιμοποιείται για την αντιμετώπιση του φαινομένου "παρενέργειας τμημάτων", που εμ φανίζεται κατά την κωδικοποίηση εικόνων σε πολύ χαμηλούς ρυθμούς. Για τον ΔΕΜ προτείνουμε μια πολύ αποδοτική παράλληλη αρχιτεκτονική, η οποία αναπτύχθηκε με τη βοήθεια της μεθοδολογίας αναδρομής στο χρόνο. Κατόπιν, παρουσιάζουμε εύκαμπτες συ στολικές διατάζεις τμηματικής σύγκρισης εξαντλητικής αναζήτησης για τα προβλήματα εκτίμησης κίνησης και στερεοσκοπικής διαφοράς, τα οποία έχουν κεντρικό ρόλο στις προ βλεπτικές τεχνικές συμπίεσης. Στη συνέχεια προτείνουμε ταχείς αλγορίθμους Μαρκοβιανών Στοχαστικών Πεδίων (ΜΣΠ) για ανίχνευση ακμών, για μη γραμμική εξομάλυνση εικόνας με διατήρηση ακμών και για εκτίμηση οπτικής ροής, οι οποίοι μπορούν να βελτιώσουν δραματικά την απόδοση των υβριδικών τεχνικών συμπίεσης εικόνας. Τέλος, εισάγουμε VLSI αρχιτεκτονικές για την υλοποίηση των αλγορίθμων αυτών, ικανές να αποτελέσουν τον υπολογιστικό πυρήνα ενός βασισμένου σε ΜΣΠ Εξειδικευμένου Συστή ματος Επεξεργασίας Εικόνας.

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An efficient rotation circuit and its application in VLSI transform processors

Cited by 3 publications

References 11 publications

Exploring Greek Manuscripts in the Library at Wellcome Collection in London

Exploring Greek Manuscripts in the Library at Wellcome Collection in London

Time-recursive computation and real-time parallel architectures: a framework

Αλγοριθμοι Και Αρχιτεκτονικες Vlsi Για Συμπιεση Ψηφιακων Εικονων

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