170,567 research outputs found
Chapter 23. Studies on sleep during the apallic syndrome
No full textThe presence of electroencephalographic and behavioral patterns typical of sleep in unconscious patients was established some time ago (Jouvet et al., 1961; Chatrian et al., 1963; Silverman, 1963; Hess, 1965; Bergamasco et al., 1966a, b; Bricolo, 1966; Cadilhac et al., 1966; Lepetit et al., 1966). There have also been studies on the correlation between the organization of sleep, degree of coma, and anatomic cerebral lesions (French, 1952; Jouvet et al., 1961; Silverman, 1963; Bricolo, 1966; Cadilhac et al., 1966; Lepetit et al., 1966). Finally, it has been suggested that the type of sleep organization might yield useful elements for a prognosis (Bergamasco et al., 1966a, b; Bricolo, 1966). The research carried out by Dolce and Kaemmerer (1966), Gentilomo et al. (1966), Bricolo (1966), Rosadini and Gentilomo (1967) appears particularly important, since they studied the EEG patterns of sleep in a group of comatose patients who were evolving towards the apallic syndrome. These authors reported that they had found all the various phases of physiologic sleep, noticing only a peculiar gradual recovery of each single phase, characterized by the constant delay of desynchronized sleep with REM which always reappears after the complete restructuring of synchronized sleep. These initial observations led to further research on the sleep of comatose patients and in particular in cases of prolonged comas and of apallic syndromes. These studies were undertaken during the past few years by sleep laboratories in Turin, Frankfurt, Genoa, and Verona
Modelos aplicados a cultura da cana-de-açúcar: CANEGRO e outros.
No full textModelo matemático-fisiológico de estimativa de produtividade, descrito por Barbieri, 1993. Modelo matemático de Balanço de Carbono, descrito por Pereira, 1987. Modelo de acúmulo de matéria seca, descrito por Inman-Bamber and Thompson, 1989. Modelo CANEGRO, descrito por Inman-Bamber, Culverwell, McGlinchey, 1993. Evolução para a programação modular, descrito por International Consortium for Agricultural Systems Applications - ICASA. Modelo de Transferência de metais pesados no sistema solo-cana-de-açúcar, descrito por Fábio César da Silva, Laércio Luis Vendite, Alessandra Fabíola Bergamasco, 2000. Modelo de Crescimento de Índice de Área Foliar (IAF) de cana-de-açúcar, descrito por Teruel, 1996
Il lanificio bergamasco nel XVII secolo: lavoro, consumi e mercati
No full textAnalisi del comparto laniero bergamasco nella cosiddetta "crisi" del Seicento. Nel caso in questione si può parlare di un settore davvero in controtendenza e proiettato verso futuri importanti sviluppi
A 6-DOF haptic manipulation system to verify assembly procedures on CAD models
No full textDuring the design phase of products and before going into production, it is necessary to verify the presence of mechanical plays, tolerances, and encumbrances on production mockups. This work introduces a multimodal system that allows verifying assembly procedures of products in Virtual Reality starting directly from CAD models. Thus leveraging the costs and speeding up the assessment phase in product design. For this purpose, the design of a novel 6-DOF Haptic device is presented. The achieved performance of the system has been validated in a demonstration scenario employing state-of-the-art volumetric rendering of interaction forces together with a stereoscopic visualization setup
Rotorcraft system identification: an integrated time-frequency domain approach
No full textThe problem of rotorcraft system identification is considered and a novel,
two step technique is proposed, which combines the advantages of time domain and
frequency domain methods. In the first step, the identification of a black-box model
using a subspacemodel identificationmethod is carried out, using a techniquewhich
can deal with data generated under feedback; subsequently, in the second step, a-
priori information on the model structure is enforced in the identified model using
an Hinf model matchingmethod. A simulation study is used to illustrate the proposed
approach
- …
