Search results for "Sound"

On Analytical vs . Schizophrenic Procedures for Computing Music

2009

The authors present a perspective on computer music, which is based on some particular definitions of music in relation to oral culture and cybernetics. They describe some experiments with different models of neural architectures which generate original music, and then suggest that if such neural systems are rich, effective and intuitive enough to produce ‘live’ music, the understanding of their behaviour may require the development of some ‘schizophrenic’ procedures, as well as analytical ones.

Discrete Time Signal Processing Framework with Support Vector Machines

2007

Digital signal processing (DSP) of time series using SVM has been addressed in the literature with a straightforward application of the SVM kernel regression, but the assumption of independently distributed samples in regression models is not fulfilled by a time-series problem. Therefore, a new branch of SVM algorithms has to be developed for the advantageous application of SVM concepts when we process data with underlying time-series structure. In this chapter, we summarize our past, present, and future proposal for the SVM-DSP frame-work, which consists of several principles for creating linear and nonlinear SVM algorithms devoted to DSP problems. First, the statement of linear signal mod…

NMR relaxation times of trabecular bone—reproducibility, relationships to tissue structure and effects of sample freezing

2010

Nuclear magnetic resonance (NMR) spectroscopy provides a potential tool for non-invasive evaluation of the trabecular bone structure. The objective of this study was to determine the reproducibility of the NMR relaxation parameters (T(2), Carr-Purcel-T(2), T(1ρ)) for fat and water and relate those to the structural parameters obtained by micro-computed tomography (μCT). Especially, we aimed to evaluate the effect of freezing on the relaxation parameters. For storing bone samples, freezing is the standard procedure during which the biochemical and cellular organization of the bone marrow may be affected. Bovine trabecular bone samples were stored at -20 °C for 7 days and measured by NMR spec…

Mikrostruktur der Lunge: Untersuchung mittels Diffusionsmessung von hochpolarisiertem 3Helium

2006

Imaging methods to study the lung are traditionally based on x-ray or on radioactive contrast agents. Conventional magnetic resonance imaging (MRI) has only limited applications for lung imaging because of the low tissue density of protons concentration of hydrogen atoms, which are usually the basis for the imaging. The introduction of hyperpolarized noble gases as a contrast agent in MRI has opened new possibilities for lung diagnosis. The present paper describes this new technique. Diffusion-weighted MRI for assessment of the lung microstructure is presented here as an example of the new possibilities of functional imaging. Studies to determine the sensitivity of the diffusion measurement…

Non-invasive determination of cardiac output by transesophageal Doppler ultrasound-clinical application and validation

2003

The authors describe the development and validation of a device using transesophageal (TE) Doppler ultrasound to provide continuous and noninvasive monitoring of cardiac output (CO) and related parameters. In intubated and artificially ventilated patients who underwent pulmonary artery catherization for hemodynamic monitoring, CO was determined by the esophageal Doppler ultrasound probe and compared to the results obtained simultaneously by means of thermodilution. A very close correlation was found between the results (r=0.99), with a standard estimate of error less than 5% as well as good reproducibility (r=0.96 and r=0.98). >

P04.29: Is the finding of a central gall bladder an anatomic variant?

2005

Oilseed treatment by ultrasounds and microwaves to improve oil yield and quality: An overview.

2016

International audience; Efficiency is a key point to ensure the profitability in the production of vegetable oils from oilseeds. To maximize the recovery yields of seed oils, the traditional process involves mechanical expression followed by subsequent chemical extraction using organic solvents (e.g. hexane). Besides health, environmental, and economic related issues to the use of organic solvents, thermal treatment of seeds during conventional oil extraction process inevitably leads to chemical changes (e.g. changes in macronutrients such as protein denaturation/degradation in the meal, oil oxidation, and changes in minor constituents such as fatty acids, sterols, phenolic compounds and to…

Functional MR imaging of pulmonary ventilation using hyperpolarized noble gases.

2000

The current status of experimental and clinical applications for functional MR imaging of pulmonary ventilation using hyperpolarized noble gases are reviewed. 3-helium (3He) and 129-xenon (129Xe) can be hyperpolarized by optical pumping techniques such as spin exchange or metastability exchange in sufficient amounts. This process leads to an artificial, non-equilibrium increase of the density of excited nuclei which represents the source of the MR signal. Those hyperpolarized gases are administered mostly via inhalation, and will fill airways and airspaces allowing for ventilation imaging. Recent human studies concentrate on imaging the airways and airspaces with high spatial resolution. N…

Verifiche Diagnostiche nell'ex Chiesa Madre di Santa Margherita di Belice

2011

La relazione presenta in modo dettagliato gli esiti della seconda campagna di indagini diagnostiche, svolta nella fabbrica architettonica a cantiere di restauro in corso d'opera. L'obiettivo delle valutazioni non distruttive e minimamente invasive è valutare la corretta esecuzione degli interventi attraverso il confronto tra la diagnosi preliminare e quella post-intervento. The report presents in detail the results of the second campaign of diagnostic investigations, carried out in the architectural restoration site. The goal of minimally invasive and non-destructive evaluation is to assess the proper execution of consolidation through the comparison between the preliminary and post-interve…

Indagini diagnostiche nella chiesa di Santa Maria delle Stelle a Comiso

2012

La relazione riporta dettagliatamente gli esiti di una campagna d'indagini non distruttive e minimamente invasive svolte nella chiesa madre di Santa Maria delle Stelle a Comiso, su incarico della Soprintendenza ai Beni Culturali e Ambientali della Provincia di Ragusa. Le indagini diagnostiche comprendono la termografia all'infrarosso, l'indagine radar, l'indagine ultrasonica, le ispezioni endoscopiche, il controllo dell'umidità e le verifiche statiche. Technical Report regarding the outcome of a campaign of minimally invasive and non-destructive surveys conducted in the mother church of Santa Maria delle Stelle in Comiso (RG) on assignment by the Superintendence of Cultural Heritage and Env…