8,351 research outputs found
Resonant Leptogenesis
We study the scenario of thermal leptogenesis in which the leptonic
asymmetries are resonantly enhanced through the mixing of nearly degenerate
heavy Majorana neutrinos that have mass differences comparable to their decay
widths. Field-theoretic issues arising from the proper subtraction of real
intermediate states from the lepton-number-violating scattering processes are
addressed in connection with an earlier developed resummation approach to
unstable particle mixing in decay amplitudes. The pertinent Boltzmann equations
are numerically solved after the enhanced heavy-neutrino self-energy effects on
scatterings and the dominant gauge-mediated collision terms are included. We
show that resonant leptogenesis can be realized with heavy Majorana neutrinos
even as light as about 1 TeV, in complete accordance with the current solar and
atmospheric neutrino data.Comment: 53 pages, LaTeX, 5 eps figures, improved Eq. (A.7) and clarifying
comments adde
Standardised method for reporting exercise programmes : protocol for a modified Delphi study
Introduction Exercise is integral to health across the lifespan and important for people with chronic health conditions. A systematic review of exercise trials for chronic conditions reported suboptimal descriptions of the evaluated interventions and concluded that this hinders interpretation and replication. The aim of this project is to develop a standardised method for reporting essential exercise programme details being evaluated in clinical trials.
Methods and analysis A modified Delphi technique will be used to gain consensus among international exercise experts. We will use three sequential rounds of anonymous online questionnaires to refine a standardised checklist. A draft checklist of potentially relevant items was developed based on the results of a systematic review of exercise systematic reviews. An international panel of experts was identified by exercise systematic review authorship, established international profile in exercise research and practice and by peer referral. In round 1, the international panel of experts will be asked to rate the importance of each draft item and provide additional suggestions for revisions or new items. Consensus will be considered reached if at least 70% of the panel strongly agree/disagree that an item should be included or excluded. Where agreement is not reached or there are suggestions for altered or new items, these will be taken to round 2 together with an aggregated summary of round 1 responses. Following the second round, a ranking of item importance will be made to rationalise the number of items. The final template will be distributed to panel members for approval.
Ethics and dissemination Ethics approval was received from The Cabrini Institute Ethics Committee, Melbourne, Australia (HREC 02-07-04-14). We plan to use a stepwise process to develop and refine a standardised and internationally agreed template for explicit reporting of exercise programmes. The template will be generalisable across all types of exercise interventions. The findings will be disseminated through peer-reviewed publications and conference presentations
STARPROBE: Scientific rationale
The scientific rationale and instrumentation problems in the areas of solar internal dynamics and relativity, solar plasma and particle dynamics, and solar atmosphere structure were studied. Current STARPROBE mission and system design concepts are summarized
Interview with Elena Marchevska
Edited transcripts of interviews with selected mother/artists, which have been carried out over the course of the project Performance and the Maternal. Interviews are published in the language in which they were conducted and have been edited for clarity
Book Review : H. A. Becker and A. L. Porter, IMPACT ASSESSMENT TODAY. Utrecht: Uitgeverij Jan van Arkel, 1986
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/68751/2/10.1177_104687818801900217.pd
Experiments in Strategic Level Driver Behavior
https://deepblue.lib.umich.edu/bitstream/2027.42/154110/1/underwood1990b.pd
A comparison of interaction patterns of high-anxiety and low-anxiety student teachers
This investigation was undertaken to compare the behavioral interaction patterns of student teacher that ranked either high or low in anxiety and high or low in perception of threat.
[This is an excerpt from the abstract. For the complete abstract, please see the document.
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