21,061 research outputs found
Neutrino Masses in a 5D TeV Unification Model
We study the generation of neutrino masses in the electroweak
unified theory in spacetime. By appropriate
orbifolding, the bulk symmetry is broken into
at one of the fixed points, where the quarks reside. The leptons form
triplets, localized at the other symmetric fixed point. The fermion masses
arise from the bulk Higgs sector containing a triplet and an anti-sextet. We
construct neutrino Majorana masses via 1-loop quantum corrections by adding a
parity odd bulk triplet scalar. No right-handed neutrino is needed. The
neutrino mass matrix is of the inverted hierarchy type. We show that the model
can easily accommodate the bi-large mixing angle solution favored by the recent
neutrino experiments without much fine tuning of parameters. The constraints
from \mu\ra 3e transition and neutrinoless double beta decays are discussed.Comment: 14 pages, 4 figure
Cloud Storage and Bioinformatics in a private cloud deployment: Lessons for Data Intensive research
This paper describes service portability for a private cloud deployment, including a detailed case study about Cloud Storage and bioinformatics services developed as part of the Cloud Computing Adoption Framework (CCAF). Our Cloud Storage design and deployment is based on Storage Area Network (SAN) technologies, details of which include functionalities, technical implementation, architecture and user support. Experiments for data services (backup automation, data recovery and data migration) are performed and results confirm backup automation is completed swiftly and is reliable for data-intensive research. The data recovery result confirms that execution time is in proportion to quantity of recovered data, but the failure rate increases in an exponential manner. The data migration result confirms execution time is in proportion to disk volume of migrated data, but again the failure rate increases in an exponential manner. In addition, benefits of CCAF are illustrated using several bioinformatics examples such as tumour modelling, brain imaging, insulin molecules and simulations for medical training. Our Cloud Storage solution described here offers cost reduction, time-saving and user friendliness
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