Search results for "Radon"

Absolutely continuous variational measures of Mawhin's type

2011

Abstract In this paper we study absolutely continuous and σ-finite variational measures corresponding to Mawhin, F- and BV -integrals. We obtain characterization of these σ-finite variational measures similar to those obtained in the case of standard variational measures. We also give a new proof of the Radon-Nikodým theorem for these measures.

Gaussian surface measures and the radon transform on separable banach spaces

1980

INQUINAMENTO INDOOR DA RADON. UNA APPLICAZIONE DELLE RETI BAYESIANE A SUPPORTO DELLA DIAGNOSI

2010

Nel quadro più generale della tematica del controllo della qualità ambientale e più in particolare dell’Indoor Air Quality, la presente relazione riporta lo studio di un fenomeno di inquinamento da radon riguardante la scuola “G. Mancino” di Palermo. Lo spunto viene offerto dal fatto che nel 2005, nel corso di un monitoraggio della radioattività ambientale di Palermo, i tecnici dell’ARPA Sicilia hanno rilevato in questa scuola elementare degli anni ’30, livelli di radon indoor molto superiori ai limiti di legge fissati dal D.Lgs. 241/2000. Nella prima fase, dopo lo studio delle caratteristiche tipologiche e costruttive del plesso e l’acquisizione dei dati di misura pregressi, si è proceduto…

PARAMETRI STRUTTURALI DI SITI SPORTIVI INDOOR E RISCHIO RADON. RISULTATI PRELIMINARI DI UN'INDAGINE NELLE PALESTRE A PALERMO.

2008

Natural radioactivity in a volcanic island: Ustica, Southern Italy

1997

Abstract Gamma-ray spectrometric measurements were performed on rocks and soils of the island of Ustica (Southern Italy) to quantify the concentrations of the natural radionuclides. The 238U, 232Th, and 40K concentration ranges (15–164, 16–174, and 201–1350 Bq kg−1, respectively) were compared with mineralogical and chemical data obtained by XRD and XRF analyses. The observed levels of the primordial radionuclides corresponded to the magmatological features of the rocks. Soil samples generally showed specific gamma-ray activities not directly correlatable to those measured in the underlying rocks. A survey was also perormed to measure air kerma in outdoor and indoor environments using therm…

Observation of octupole structures in radon and radium isotopes and their contrasting behavior at high spin

1997

Multinucleon transfer reactions have been used, for the first time, to populate high-spin bands of alternating parity states in {sup 218,220,222}Rn and {sup 222,224,226}Ra. The behavior of the angular momentum alignment with rotational frequency for the Rn isotopes is very different when compared with Ra and Th isotopes with N{approx}134, indicating a transition from octupole vibrational to stable octupole deformation. Throughout the measured spin range the values of {vert_bar}D{sub 0}/Q{sub 0}{vert_bar} remain constant for {sup 222}Ra and {sup 226}Ra and have a very small value for {sup 224}Ra, suggesting that the charge and mass distributions are not affected appreciably by rotations. {co…

Radon and material radiopurity assessment for the NEXT double beta decay experiment

2015

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM

EFFICIENT MACHINE LEARNING FRAMEWORK FOR COMPUTER-AIDED DETECTION OF CEREBRAL MICROBLEEDS USING THE RADON TRANSFORM

2014

International audience; Recent developments of susceptibility weighted MR techniques have improved visualization of venous vasculature and underlying pathologies such as cerebral microbleed (CMB). CMBs are small round hypointense lesions on MRI images that are emerging as a potential biomarker for cerebrovascular disease. CMB manual rating has limited reliability, is time-consuming and is prone to errors as small CMBs can be easily missed or mistaken for venous crosssections. This paper presents a computer-aided detection technique that utilizes a novel cascade of random forest classifiers which are trained on robust Radon-based features with an unbalanced sample distribution. The training …

Radionuklīdu piesārņojuma kontrole bīstamo atkritumu pārvaldības valsts aģentūras objektu pazemes ūdeņos

2017

Rаdionuklīdu piesārņojumа kontrole bīstаmo аtkritumu pārvаldībаs vаlsts аģentūrаs objektu pаzemes ūdeņos Rundāne. I, zinātniskā vаdītājа Dr. сhem. Pаjuste E. Mаģistrа dаrbs. 58 lаppuses, 29 аttēls, 11 tаbulаs, 36 literаtūrаs аvoti. Lаtviešu vаlodā. Dаrbā аnаlizētа rаdionuklīdu H3, Сs137, Th 232 un U238 īpаtnējā аktivitātē RАG Rаdons pаzemes ūdeņos no urbumiem B-3 un B-4. Аnаlizēti pārskаtа ikmānešа rezultāti pаr lаikа posmu no 2011. gаdа līdz 2016. gаdаm. Noskаidrots, kа аktivitāte nepārsniedz pieļаujаmo līmeni nevienā no urbumiem, bet ir novērotаs tritijа īpаtnējās rаdioаktivitātes svārstībаs. Bаlstoties uz pārskаtu rezultātiem izstrādātаs rekomendāсijаs monitoringа progrаmmаs uzlаbošаnаi.…

Radon-Nikodym theorem in quasi *-algebras

2013

In this paper some properties of continuous representable linear functionals on a quasi $*$-algebra are investigated. Moreover we give properties of operators acting on a Hilbert algebra, whose role will reveal to be crucial for proving a Radon-Nikodym type theorem for positive linear functionals.