These results show that MAGIC-f gel is a promise for tridimensional dose distribution measurements.

Due to the strong energy dependence observed with microchambers containing high-Z components, these chambers may not be suitable dosimeters for kilovoltage x-ray applications, as they do not meet the TG-61 requirements. It is recommended that only microchambers containing low-Z materials (Z ≤ 13) be considered for air-kerma calibrations for reference dosimetry in low- and medium-energy x-ray beams.

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We present measurements of kaon and antiproton production cross sections in the momentum region of 700 MeV/c from 0" to 10" by 28.4-GeV/c protons on complex nuclei. A model to describe the A dependence of these cross sections is discussed and compared with these and other data.

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We describe the online event monitoring systems using ROOT [1] for the CDF and DØ collaborations in the upcoming Fermilab Tevatron runII. The CDF and DØ experiments consist of many detector subsystems and will run in a high rate large bandwidth data transfer environment. In the experiments, it is crucial to monitor the performance of each subsystem and the integrity of the data, in real time with minimal interruption. ROOT is used as the main analysis tool for the monitoring systems and its GUI is used to browse the results via socket, allowing multiple GUI client connections.

An extension of the neutrino sector with two right handed singlet neutrinos responsible for Dirac neutrino masses is discussed. We show that this setup with flavor symmetry can give large solar and atmospheric neutrino mixings and suppressed θ 13 . The flavor symmetry U (1) × S 4 is shown to lead to θ 23 ≃ π/4 and a new predictive formula for the θ 13 (≃ 0.015).