1,274 research outputs found
The Convention on Nuclear Safety: A Closer Look at Nuclear Accidents and Policy Decisions
The Convention on Nuclear Safety (CNS) proposed safety standards for land based nuclear power plants in response to widespread demand for standardized rules in the wake of the Chernobyl accident. This paper aims to analyze the determinants of countries’ ratification delay for the CNS using non-parametric estimates of the survival function. The current body of literature addresses either determinants of ratification of a multilateral environmental treaty, or an examination of the effectiveness of the CNS itself. However, there is little research done on the ratification delay of multilateral environmental treaties. This presentation will present these findings along with possible policy implications of the findings
Does Reading-While-Listening Enhance Students' Reading Fluency? Preliminary Results from School Experiments in Rural Uganda
Although studies on the effects of Reading While Listening (RWL) to audiobooks on students' reading fluency is limited, the available emerging literature consistently demonstrates its favourable contribution to improve reading fluency. Since improving fluency is an important instructional goal of primary schools, understanding the role of RWL to audiobooks in improving reading fluency is essential. The goal of the study was to assess the impact of RWL to audiobooks on reading fluency. To achieve this goal, we conducted a randomized controlled experiment using forty six students enrolled in grade 3 at Hadassa Primary School in rural Mbale, Uganda.The significance of the study underscores the current inefficiencies within classrooms globally and the ease with which simple interventions can be implemented to improve fluency. Limitations of the study are discussed. Keywords: Reading While Listening (RWL); reading fluency; randomized control trial; The Walking School Bus; Uganda; audioboo
Ariel - Volume 9 Number 6
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\u3cem\u3eDrosophila Unpaired\u3c/em\u3e Encodes a Secreted Protein that Activates the JAK Signaling Pathway
In vertebrates, many cytokines and growth factors have been identified as activators of the JAK/STAT signaling pathway. In Drosophila, JAK and STAT molecules have been isolated, but no ligands or receptors capable of activating the pathway have been described. We have characterized the unpaired (upd) gene, which displays the same distinctive embryonic mutant defects as mutations in the Drosophila JAK (hopscotch) and STAT (stat92E) genes. Upd is a secreted protein, associated with the extracellular matrix, that activates the JAK pathway. We propose that Upd is a ligand that relies on JAK signaling to stimulate transcription of pair-rule genes in a segmentally restricted manner in the early Drosophila embryo
Comment on studying the corrections to factorization in B -> D(*) X
We propose studying the mechanism of factorization in exclusive decays of the
form B->D(*)X by examining the differential decay rate as a function of the
invariant mass of the light hadronic state X. If factorization works primarily
due to the large N_c limit then its accuracy is not expected to decrease as the
X invariant mass increases. However, if factorization is mostly a consequence
of perturbative QCD then the corrections should grow with the X invariant mass.
Combining data for hadronic tau decays and semileptonic B decays allows tests
of factorization to be made for a variety of final states. We discuss the
examples of B->D^*\pi^+\pi^-\pi^-\pi^0 and B->D^*\omega\pi^-. The mode
B->D^*\omega\pi^- will allow a precision study of the dependence of the
corrections to factorization on the invariant mass of the light hadronic state.Comment: 7 pages, minor clarifications to tex
Ever Green: An Enduring System of Parks and Greenways in Detroit
http://deepblue.lib.umich.edu/bitstream/2027.42/110956/1/ever_green.pd
Prereferral Intervention to Increase Attention and Work Productivity Among Difficult-To-Teach Pupils
Determining the Weak Phase From Charged Decays
A quadrangle relation is shown to be satisfied by the amplitudes for , and . By comparison with the
corresponding relation satisfied by decay amplitudes, it is shown that
the relative phases of all the amplitudes can be determined up to discrete
ambiguities. Making use of an SU(3) relation between amplitudes contributing to
the above decays and those contributing to , it is
then shown that one can determine the weak phase , where is the Cabibbo-Kobayashi-Maskawa
matrix describing the charge-changing weak interactions between the quarks
and .Comment: 16 pages, latex, 7 uuencoded figure
Amplitude relations for decays involving and
A class of amplitude relations for decays of mesons is discussed.
Processes involving and in the final state are shown to provide
useful information about weak phases in some cases even in the presence of
octet-singlet mixing in these states. Some of the relations are unaffected by
first-order SU(3) breaking.Comment: 7 pages, latex, 1 uuencoded figur
What is Microbial Dormancy?
Life can be stressful. One way to deal with stress is to simply wait it out. Microbes do this by entering a state of reduced activity and increased resistance commonly called ‘dormancy’. But what is dormancy? Different scientific disciplines emphasize distinct traits and phenotypic ranges in defining dormancy for their microbial species and system-specific questions of interest. Here, we propose a unified definition of microbial dormancy, using a broad framework to place earlier discipline-specific definitions in a new context. We then discuss how this new definition and framework may improve our ability to investigate dormancy using multi-omics tools. Finally, we leverage our framework to discuss the diversity of genomic mechanisms for dormancy in an extreme environment that challenges easy definitions – the permafrost
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