The Sudbury Neutrino Observatory

The Sudbury Neutrino Observatory is a second generation water Cherenkov detector designed to determine whether the currently observed solar neutrino deficit is a result of neutrino oscillations. The detector is unique in its use of D2O as a detection medium, permitting it to make a solar model-independent test of the neutrino oscillation hypothesis by comparison of the charged- and neutral-current interaction rates. In this paper the physical properties, construction, and preliminary operation of the Sudbury Neutrino Observatory are described. Data and predicted operating parameters are provided whenever possible.Comment: 58 pages, 12 figures, submitted to Nucl. Inst. Meth. Uses elsart and epsf style files. For additional information about SNO see http://www.sno.phy.queensu.ca . This version has some new reference

Measurement of the νe and total 8B solar neutrino fluxes with the Sudbury Neutrino Observatory phase-III data set

This paper details the solar neutrino analysis of the 385.17-day phase-III data set acquired by the Sudbury Neutrino Observatory (SNO). An array of 3He proportional counters was installed in the heavy-water target to measure precisely the rate of neutrino-deuteron neutral-current interactions. This technique to determine the total active 8B solar neutrino flux was largely independent of the methods employed in previous phases. The total flux of active neutrinos was measured to be 5.54-0.31+0.33(stat.)-0.34+0.36(syst.)×106 cm-2 s-1, consistent with previous measurements and standard solar models. A global analysis of solar and reactor neutrino mixing parameters yielded the best-fit values of Δm2=7.59-0.21+0.19×10 -5eV2 and θ=34.4-1.2+1.3degrees

Agree or Disagree? Cognitive processes involved in answering contrastive survey questions

Survey designers have long assumed that respondents who disagree with a negative question (“This policy is bad.”: Yes or No; 2-point scale) will agree with an equivalent positive question (“This policy is good.”: Yes or No; 2-point scale). However, experimental evidence has proven otherwise: Respondents are more likely to disagree with negative questions than to agree with positive ones. To explain these response effects for contrastive questions, the cognitive processes underlying question answering were examined. Using eye tracking, the authors show that the first reading of the question and the answers takes the same amount of time for contrastive questions. This suggests that the wording effect does not arise in the cognitive stages of question comprehension and attitude retrieval. Rereading a question and its answering options also takes the same amount of time, but happens more often for negative questions. This effect is likely to indicate a mapping difference: Fitting an opinion to the response options is more difficult for negative questions

Studies on human filariasis in Malaysia: Immunodiagnosis using indirect immunofluorescence

Southeast Asian Journal of Tropical Medicine and Public Health104486-497SJTM

Studies on human filariasis in Malaysia: The application of an indirect hemagglutination technique for immunodiagnosis

American Journal of Tropical Medicine and Hygiene294548-552AJTH

Clinical outcome among nasopharyngeal cancer patients in a multi-ethnic society in Singapore

10.1371/journal.pone.0126108PLoS ONE105e012610

Modification of the NCEP ATP III definitions of the metabolic syndrome for use in Asians identifies individuals at risk of ischemic heart disease

10.1016/j.atherosclerosis.2005.07.020Atherosclerosis1862367-37

Outcome of liver transplantation for children with liver disease

Singapore Medical Journal477595-59