1,721,020 research outputs found
Consonance and dissonance for dyads: combining compactness and roughness
No full textThere are basically two types of approaches that aim to explain on physical grounds the psychoacoustic perception of consonance and dissonance in music. One is based on the “compactness” of the waveform of the combined signal, while the other on the absence of “roughness” induced by beats. In a previous detailed study of each approach for dyads, we found that none of the associated model versions is fully satisfactory when faced to perceptual data, while a surprisingly successful agreement is found by combining the two approaches. In the present contribution, we extend our analysis by exploring how compactness models for dyads can be related to the early arguments by GB Benedetti
VIBROTACTILE DEVICE AIMED AT STIMULATING FOOT MECHANORECEPTORS DURING NEUROREHABILITATION
No full textMETODO ED APPARATO PER CONTROLLARE PRODUZIONE ED ALIMENTAZIONE DI SEMILAVORATI IN UN PROCESSO PER CONFEZIONARE PNEUMATICI
No full textA method and an apparatus for controlling production and feeding of semifinished products in a tyre building process
No full text[0001] The invention relates to a method for controlling production and feeding of semifinished products in a tyre building process
Value of Injection Testing as an Alternative to Conventional Well Testing: Field Experience in a Sour Oil Reservoir.
No full textEnvironmental constraints and high costs, especially offshore, are making conventional well testing less and less feasible and accepted by the public Administration.
New options were thoroughly evaluated to find a viable alternative to standard production tests for characterizing the well productivity without surface production. An accurate investigation demonstrated that injection tests could provide all the information needed to calculate the well productivity at reasonably low costs and with a good degree of reliability.
Based on the results of laboratory and field pilot tests it was proved that injectivity tests could be successfully applied to a real sour oil field. Laboratory tests proved that brine could be a suitable injection fluid because there were no compatibility problems with the oil and the reservoir rock. It was verified that the interpretation of the pressure transients should be referred to the fall-off period rather than to the injection phase. The formation permeability thickness product (kh) could be correctly identified from the pressure derivative analysis only if multiphase-flow was assumed. The total skin value could also be obtained from the test interpretation.
The total skin comprises two components, a mechanical component due to permeability damage, and a bi-phase component due to fluid interaction in the reservoir. Except for a limited number of cases, the bi-phase skin can only be evaluated with numerical well testing, provided that the fluid relative permeability curves are available. It was also demonstrated that the bi-phase component mainly depends on the injection rate, but is independent from the formation permeability.
Then, the well-known transient equation was applied to determine the well productivity index (PI) based on the kh and the mechanical skin. PI values calculated from injection tests compared satisfactorily with PI values measured from 6 DST tests performed on appraisal wells
Injection Tests As A Reliable Alternative To Conventional Well Testing: A Real Field Experience.
No full textPaper SPE 10028
Dyad’s consonance and dissonance: combining the compactness and roughness approaches
No full textAt present, there are two approaches that aim at explaining on physical grounds the psychoacoustic perception of consonance and dissonance for dyads, whose pioneers have been, respectively, Galilei and Helmholtz: One is based on the “compactness” of the waveform of the combined signal, while the other on the absence of “roughness” due to possible beats. We perform a detailed study of each approach and find that none of the associated model versions, not even the more refined ones, is fully satisfactory when faced to perceptual data on dyads. We show that combining the two approaches results instead in a surprisingly successful agreement with perceptual data: This demonstrates that compactness and roughness are both necessary ingredients for a phenomenological description of consonance and dissonance
Method for controlling the deposition of elementary semifinished products in a process for building tyres for vehicle wheels
No full text[0001] The present invention regards a method for con- trolling the deposition of elementary semifinished prod- ucts in a process for building tyres for vehicle wheels. The invention also refers to an apparatus for controlling the deposition of elementary semifinished products in a process for building tyres for vehicle wheels
Cystitises in the equine species: pathogenetic causes, histomorphological aspects and analogies with the human species
No full textReports in literature of urinary bladder alterations in the equine species are few and far between Most excretory urinary tract inflammation pathologies are triggered by some sort of infection, although chemical and physical causes have also been evidenced, particularly in human medicine. Infrequent cases of phlogosis caused by toxins in the bloodstream (Cantharidin and Mycotoxin in the horse) have, however, been observed in veterinary medicine. The aim of this paper is to present a comparative study of equine cystitises and their analogies with the human species. To this end, the authors have examined 235 urine bladders taken from regularly slaughtered horsesReports in literature of urinary bladder alterations in the equine species are few and far between Most excretory urinary tract inflammation pathologies are triggered by some sort of infection, although chemical and physical causes have also been evidenced, particularly in human medicine. Infrequent cases of phlogosis caused by toxins in the bloodstream (Cantharidin and Mycotoxin in the horse) have, however, been observed in veterinary medicine. The aim of this paper is to present a comparative study of equine cystitises and their analogies with the human species. To this end, the authors have examined 235 urine bladders taken from regularly slaughtered horses
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