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Domestic architecture of the Sinhalese elite in the age of nationalism
No full textDomestic architecture of the Sinhalese elites in Sri Lanka remained as unchartered territory until recently. Having focused on the period of nationalism, which indeed is an area in oblivion (both historically and architecturally), this research established that the elite are in a position to better represent/evoke the shifting political/social/cultural forces (i.e. periodic changes) through their architecture within the Ceylonese (Sri Lankan) society. This was the foremost research question tackled. Moreover, the works of the architects Geoffrey Bawa and Valentine Gunasekara were singled-out for being two most varying trajectories aimed at the elite; the background study of post-independence architecture having led the way. How they represented the aspirations of two differing elite groups - the 'governing elite' and the 'political-class' - was then confirmed having placed them against the extant elitist theories. Moreover, the cultural strands of the Ceylonese elite to survive from pre-colonial and colonial situations were identified, and how the articulations became evident in their domestic architectures was assessed through case studies. On the other hand, as broader aims, the applicability of the outcome of the main research question to contexts other than Sri Lanka, communities other than the Sinhalese, or time periods that draw their meanings for being historically/architecturally significant, were established. Other than the foregoing unique contributions to knowledge, the enquiry into the area of elitism was significant
Role of Pollinators in the Evolution of Dioecy from Distyly
No full textAlthough dioecy in flowering plants is mostly thought to have evolved because of its function as an outbreeding system (Lewis 1942; Stebbins 1950; Baker 1959; Charlesworth and Charlesworth 1978; and see Willson 1979), other possible explanations based on the ecological and energetic advantages of unisexual individuals have been offered (Darwin 1877; Janzen 1970; Bawa and Opler 1975: Charnov et al. 1976; Freeman et al. 1980; Symon 1980). Willson (1979) and Bawa (1980) pointed out some of the limitations of the classic genetic hypothesis for the evolution of dioecy, and discussed the potential role of sexual selection in the evolution of separate male and female individuals. Horovitz and Harding (1972). Lloyd (1974, 1979), and Horovitz (1978) have also discussed the theoretical basis of gender specialization of hermaphrodites. The proposal presented here is a specific hypothesis for the evolution of dioecy in entomophilous groups. It does not displace the importance of the genetic benefits of outcrossing as a factor in the evolution of unisexuality, but rather provides a mechanism that may have operated in conjunction with the fitness rewards resulting from the production of genetically diverse progeny
On empirical risk measurement with asymmetric returns data
No full textBy formulating a nested test of the asymmetric response model of Bawa, Brown, and Klein (1981), the mean-lower partial moment CAPM (LPMCAPM) of Bawa and Lindenberg (1977) and the mean-variance CAPM of Sharpe (1963, 1964), Lintner (1965) and Mossin (1969), this paper investigates the relative merits of symmetric and asymmetric risk measures using UK equity data for differently sized companies and at different frequencies. Our analysis shows that, when equity returns are not normal - which is the case for most daily and weekly returns, and for a large portion of smaller firms - the CAPM is rejected in 30%-50% of cases, and the optimal choice of alternative model is LPM-CAPM in over two thirds of these. These, and our further results, have strong consequences for the accurate measurement of equity risk, performance and prices, as downside and/or asymmetric risk measures often outperform the traditional CAPM framework, thus rendering it’s related and widely-used current approaches sub-optimal for some company sizes/data frequency combinations
Computerised medical record systems that guide and protect – reflections on the Bawa-Garba case
No full textLawrence Weed proposed we develop computerised, problem orientated medical records that guide and teach. The Bawa-Garba case outcomes might have been different if care had been supported by computerised medical record (CMR) systems. CMR systems can reduce prescribing errors and could be develop to flag gaps in supervision. However, CMR systems are not a panacea and need to be fit for purpose. Our informatics perspective on this case is to call for widespread use of CMR systems – designed to guide and protect
Measurements of the Total and Differential Higgs Boson Production Cross Sections Combining the H→γγ and H→ZZ∗→4ℓ Decay Channels at s√=8 TeV with the ATLAS Detector
No full text6 pages plus author list + cover page + supplemental material (26 pages total), 7 figures, 23 tables, submitted to Physical Review Letters. All figures including auxiliary figures are available at this http URL - See paper for full list of authorsInternational audienceMeasurements of the total and differential cross sections of Higgs boson production are performed using 20.3 fb−1 of pp collisions produced by the Large Hadron Collider at a center-of-mass energy of s√=8 TeV and recorded by the ATLAS detector. Cross sections are obtained from measured H→γγ and H→ZZ∗→4ℓ event yields, which are combined accounting for detector efficiencies, fiducial acceptances and branching fractions. Differential cross sections are reported as a function of Higgs boson transverse momentum, Higgs boson rapidity, number of jets in the event, and transverse momentum of the leading jet. The total production cross section is determined to be σpp→H=33.0±5.3(stat)±1.6(sys)pb. The measurements are compared to state-of-the-art predictions
Search for charged Higgs bosons decaying via H-+/- -> tau(+/-)nu in fully hadronic final states using pp collision data at root s=8 TeV with the ATLAS detector
No full textSee paper for full list of authors – 27 pages plus author list + cover pages (50 pages total), 8 figures, 5 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-30/International audienceThe results of a search for charged Higgs bosons decaying to a lepton and a neutrino, , are presented. The analysis is based on 19.5 fb of proton-proton collision data at TeV collected by the ATLAS experiment at the Large Hadron Collider. Charged Higgs bosons are searched for in events consistent with top-quark pair production or in associated production with a top quark. The final state is characterised by the presence of a hadronic decay, missing transverse momentum, -tagged jets, a hadronically decaying boson, and the absence of any isolated electrons or muons with high transverse momenta. The data are consistent with the expected background from Standard Model processes. A statistical analysis leads to 95% confidence-level upper limits on the product of branching ratios , between 0.23% and 1.3% for charged Higgs boson masses in the range 80-160 GeV. It also leads to 95% confidence-level upper limits on the production cross section times branching ratio, , between 0.76, pb and 4.5, fb, for charged Higgs boson masses ranging from 180, GeV to 1000, GeV. In the context of different scenarios of the Minimal Supersymmetric Standard Model, these results exclude nearly all values of above one for charged Higgs boson masses between 80 GeV and 160 GeV, and exclude a region of parameter space with high for masses between 200 GeV and 250 GeV
Search for the Higgs boson decays H → ee and H → eμ in pp collisions at s=13TeV with the ATLAS detector
No full textSearches for the Higgs boson decays H -> ee and H -> e mu are performed using data corresponding to an integrated luminosity of 139 fb(-1) collected with the ATLAS detector in pp collisions at root s = 13 TeV at the LHC. No significant signals are observed, in agreement with the Standard Model expectation. For a Higgs boson mass of 125 GeV, the observed (expected) upper limit at the 95% confidence level on the branching fraction B(H -> ee) is 3.6 x 10(-4) (3.5 x 10(-4)) and on B(H -> e mu) is 6.2 x 10(-5) (5.9 x 10(-5)). These results represent improvements by factors of about five and six on the previous best limits on B(H -> ee) and B(H -> e mu) respectively
Search for a light charged Higgs boson in the decay channel H+→cs¯ in tt¯ events using pp collisions at s√=7 TeV with the ATLAS detector
No full textA search for a charged Higgs boson (H +) in tt¯ decays is presented, where one of the top quarks decays via t→H + b, followed by H +→ two jets ( cs¯ ). The other top quark decays to Wb, where the W boson then decays into a lepton (e/μ) and a neutrino. The data were recorded in pp collisions at s√=7 TeV by the ATLAS detector at the LHC in 2011, and correspond to an integrated luminosity of 4.7 fb−1. With no observation of a signal, 95 % confidence level (CL) upper limits are set on the decay branching ratio of top quarks to charged Higgs bosons varying between 5 % and 1 % for H + masses between 90 GeV and 150 GeV, assuming B(H+→cs¯)=100 %
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