Search results for "ghost"
showing 10 items of 38 documents
Postcolonial Ghosts / Fantômes Postcoloniaux
2009
As liminal beings, ghosts seem particularly appropriate to define, question or challenge hybrid cultures where several, seemingly irreconcilable, identities coexist. The present volume wonders how they manifest themselves in the English-speaking world, and whether there is a specifically postcolonial kind of haunting. The 22 articles deal with textual, translational or historical ghosts, and take us to Canada, Australia, Africa, India or the Caribbean. Poems by Gerry Turcotte literally haunt the volume, which thus juxtaposes theory and practice in a dynamic and fruitful way.
Nonlinear resonances and some of their applications to information processing
2021
The study of resonance phenomena in nonlinear dynamical systems has drawn considerable attention for years. The most studied nonlinear resonance is undoubtedly the famous stochastic resonance, which consists of perturbing a nonlinear system with an appropriate amount of noise to enhance the detection of a subthreshold input signal. Since the introduction of stochastic resonance in the context of climate dynamics, it was later observed that a deterministic high frequency perturbation can replace noise leading to vibrational resonance. Even if this latter resonance was investigated in many areas of science for more than two decades now, it is still receiving attentions. It is the subject of t…
Vizio di firma. Plagio e dintorni
2022
Se esiste il dono della scrittura, c’è anche chi invidia quel talento e i suoi frutti: un sentimento che può trasformarsi in tentazione, magari portare al furto, perfino all’omicidio. Quante trame ci parlano di questa semplice idea: qualcuno mette il suo nome sull’opera di un altro. Romanzi e film mescolano più o meno gli stessi ingredienti, dosandoli però in modo differente. E chi li osserva può cedere alla fantasticheria di un unico grande racconto del plagio, un tema che fatalmente si ripete perché non si esce dall’ossessione che lo nutre. Una narrazione che lettori e spettatori ritroveranno in questo libro, scandita nelle sale di una lunga galleria. Siamo nel confortevole territorio del…
Noise contribution to resonance phenomena and information propagation in non linear electronic networks
2015
This manuscript presents research aiming to show possible positive effects of deterministic and stochastic perturbations on the responses of different nonlinear systems. To that end, both numerical and experimental studies were carried out on two kinds of structures : an elementary electronic FitzHugh-Nagumo oscillator and an electrical line developed by resistively coupling 45 elementary cells. In the first section, the elementary cell characterization was undertaken in a deterministic regime. In the presence of a bichromatic stimulus, it is shown that when the low frequency component is subthreshold, its detection can be maximized for an optimal magnitude of the second component thanks to…
Random angular coding for superresolved imaging.
2010
In this paper, we present a new approach capable of working under coherent and incoherent illumination for achieving superresolution by random coding of the object's angular information. By placing two static random masks in optically conjugate planes inside an aperture-limited imaging setup, one may obtain a transmitted image containing spatial resolution higher than the one obtained without the masks. As the most noticeable fact, the superresolution effect is obtained without imposing any restrictions either in the time domain or in the field-of-view domain but rather only in the dynamic range of the camera device. Experimental verifications for the proposed technique with incoherent illu…
GHOST NETS AS SUBSTRATE FOR MARINE INVERTEBRATES
An SVD-Based Approach for Ghost Detection and Removal in High Dynamic Range Images
2012
International audience; In this paper, we propose a simple method for the ghost detection problem in the context of merging multiple low dynamic range (LDR) images to form a high dynamic range (HDR) image. We show that the second biggest singular values extracted over local spatio-temporal neighbourhoods can be effectively used for ghost region detection. Furthermore, we combine the proposed method with an exposure fusion technique to generate final HDR image free of ghosting artefacts. We present experimental results to illustrate the efficiency of the proposed method and quantitative comparison with other existing approaches show the good performance of our method in detecting and removin…
Sequestrati dalla vendetta: “rimanere chiusi fuori dall’oggetto”
2013
RiassuntoA partire dal loro lavoro di psicoterapeute e attraverso alcuni frammenti clinici che si riferiscono ad un gruppo di adolescenti svoltosi in un quartiere a rischio di Palermo, le Autrici analizzano la dimensione mafiosa non restringendola al solo comportamento criminale; piuttosto declinandola lungo alcuni significanti: non identità e gruppo mafioso che colonizza e sottomette lo psichismo del singolo; fantasmi familiari potenti e spietati che impediscono il costituirsi di sé originali e autonomi; personalità impastate di indifferenza emotiva e vendicatività. Significanti che rendono conto delle vaste aree di desertificazione e pietrificazione – resistenza al cambiamento – avvertita…
Ghosts from the Abyss. The imagination of new worlds in the sea-narratives of Afrofuturism
2022
This contribution aims to investigate a different ghostscape, shaped by the turbulent materiality of the sea: the abyss. A space of trauma and simultaneously of becoming, it is populated by spectral objects, traces, fragments, and, above all, ghosts. Looking into the abyss through the turbulent materiality of the sea (where the turbulence recalls Haraway’s trouble and the materiality a livingness of the world in which “matter comes to matter”), sea-related ghosts from the Black Atlantic to the Black Mediterranean emerge as absences-presences that matter. The emersion of sea-related new worlds is one of the main topics of Afrofuturism narratives: from the Drexciya world to the Novella The De…
Regional odontodysplasia of the deciduous and permanent teeth associated with eruption disorders: A case report
2008
WOS: 000259667500007 PubMed: 18758400 Regional odontodysplasia (RO) is an unusual, non-hereditary anomaly of the dental hard tissues with characteristic clinical, radiographic and histological findings. Clinically, RO affects the primary and permanent dentition in the maxilla and mandible or both jaws. Radiographically, there is a lack of contrast between the enamel dentin, both of which are less radiopaque than unaffected counterparts. Additionally, enamel and dentin layers are thin, giving the teeth a "ghost-like" appearance. Histologically, areas of hypocalcified enamel are visible and enamel prisms appear irregular in direction. Coronal dentin is fibrous, consisting of clefts and a redu…