568 research outputs found
Structural fire safety assessment of car and motor scooter RC parks using the FSE approach
No full textApplication of FSE approach for structural fire safety assessment of car and motor scooter parks
No full textIn the international research field, the application of the FSE approach to study car parks fire behaviour is a well-investigated topic, unlike when the park is intended for motorcycles. Thus, the aim of this work is to investigate several fire scenarios correlated to the two different intended uses. Different fire curves were obtained thanks to thermo-fluid-dynamic zone models knowing Heat Release Rate (HRR) curves from the literature. Results showed that a motorcycle fire can become significant for exodus reason, while the car fire must be considered for structural fire resistance purpose. Several advanced thermo-mechanical analyses were carried out on substructures selected according to FSE criteria, both using natural and nominal fire curves. The results have underlined the importance of the FSE to reduce the structural fire demand
CHARACTERISTICS AND PERFORMANCE OF AN ELECTROMAGNETIC SHOWER SAMPLING CALORIMETER WITH WAVELENGTH SHIFTING FIBER READOUT
No full textWe have studied the properties of electromagnetic shower counters made of scintillator and lead tiles of different thickness. Light collection is achieved by wavelength shifting fibres sparse in the body of the calorimeter. The counters were tested in a beam of electrons, pions and muons with energies between 2 and 8 GeV. We report here the final results of the test. The energy resolution is in good agreement with what is expected from the sampling fraction, i.e. sigma/E = 0.07/root E, the non uniformity of the response is less than 1% at the centre of a counter and 7 in the boundaries between modules, and the pi/e contamination is at the level of a few 10(-3). Performance of the calorimeter with readout systems able to operate in magnetic field is also reported
Parameterization of e and gamma initiated showers in the NOMAD lead-glass calorimeter
No full textA description of the response of the NOMAD electromagnetic calorimeter to electrons and photons is discussed. In
particular, the dependence of the two-dimensional shower shape on the angle and energy of the incident particle is
parametrized by analytical functions. Some applications to the neutrino event reconstruction are also reported
North-Holland Characteristics and performance ofan electromagnetic shower sampling calorimeter with wavelength shifting fibre readout
No full textWe have studied the properties ofelectromagnetic shower counters made ofscintillator and lead tiles ofdifferent thickness. Light collection is achieved by wavelength shifting fibres sparse in the body of the calorimeter. The counters were tested in a beam of electrons, pions and muons with energies between 2 and 8 GeV. We report here the final results of the test. The energy resolution is in good agreement with what is expected from the sampling fraction, i.e. Q/E = 0.07/vT, the non uniformity of the response is less than 1 % at the centre of a counter and 7 % in the boundaries between modules, and the n/e contamination is at the level of a few 10-3. Performance of the calorimeter with readout systems able to operate in magnetic field is also reported.
Superluminal velocity through near-maximal neutrino oscillations or by being off shell
No full textRecently it was suggested that the observation of superluminal neutrinos by the OPERA collaboration may be due to group velocity effects resulting from close-to-maximal oscillation between neutrino mass eigenstates, in analogy to known effects in optics. We show that superluminal propagation does occur through this effect for a series of very narrow energy ranges, but this phenomenon cannot explain the OPERA measurement. Superluminal propagation can also occur if one of the neutrino masses is extremely small. However the effect only has appreciable amplitude at energies of order this mass and thus has negligible overlap with the multi-GeV scale of the experiment
Studio sull'applicabilità del PTR-MS al controllo degli odori negli impianti per il trattamento dei rifiuti
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