569 research outputs found
The Salinity Distribution in Young Sea-Ice
When undertaking a study of the lateral variation of the salinity of sea-ice it is necessary to select an area of ice with a known history. The field measurements reported here were made in North Star Bay, Thule, northwestern Greenland .... The sampling for the sheet ice grid was started at 1100 on November 6 and by 2100 the 2-, 4-, 8- and 16-foot grids were completed. The 32-, 64- and 128-foot grids were completed the following morning. ... Sampling of the pancake ice was started at 0900 on November 9 and completed by the evening of the same day. ... the standard deviation of the salinity values from closely spaced cored samples in sheet ice is always equal to or greater than ±0.3 per mil. In pancake ice, the standard deviation is usually ±1.0 per mil. ... this uncertainty will produce a standard deviation of approx. ±4 to 6 per cent of the total brine volume in the sheet ice and ±11 to 19 per cent of the total brine volume in pancake ice. This then accounts for a considerable proportion of the scatter observed in studying the strength properties of sea-ice
Correction to: Thermal decomposition of rice husk: a comprehensive artificial intelligence predictive model
Unfortunately, in the original publication of the article the third author name was misspelled as
Faisal Abnisal. The corrected author name should read as âFaisal Abnisaâ. The affiliation of
third author was incorrectly published. The corrected affiliation is given below
Thermal decomposition of rice husk: a comprehensive artificial intelligence predictive model
This study explored the predictive modelling of the pyrolysis of rice husk to
determine the thermal degradation mechanism of rice husk. The study can
ensure proper modelling and design of the system, towards optimising the
industrial processes. The pyrolysis of rice husk was studied at 10, 15 and
20 °C minâ1 heating rates in the presence of nitrogen using thermogravimetric
analysis technique between room temperature and 800 °C. The thermal
decomposition shows the presence of hemicellulose and some part of
cellulose at 225â337 °C, the remaining cellulose and some part of lignin were
degraded at 332â380 °C, and lignin was degraded completely at 480 °C. The
predictive capability of artificial neural network model was studied using
different architecture by varying the number of hidden neurone node, learning
algorithm, hidden and output layer transfer functions. The residual mass, initial degradation temperature and thermal degradation rate at the end of the
experiment increased with an increase in the heating rate. Levenbergâ
Marquardt algorithm performed better than scaled conjugate gradient
learning algorithm. This result shows that rice husk degradation is best
described using nonlinear model rather than linear model. For hidden and
output layer transfer functions, âlog-sigmoid and tan-sigmoid', and âtansigmoid
and tan-sigmoid' transfer functions showed remarkable results based
on the coefficient of determination and root mean square error values. The
accuracy of the results increases with an increasing number of hidden
neurone. This result validates the suitability of an artificial neural network
model in predicting the devolatilisation behaviour of biomass
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in âs = 7 TeV pp collisions with the ATLAS detector
A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fbâ1 of protonâproton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results
Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
Measurements of inclusive jet suppression in heavy ion collisions at the LHC
provide direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated
luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with
a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the
transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the
anti-kt algorithm with values for the distance parameter that determines the
nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of
the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp.
Jet production is found to be suppressed by approximately a factor of two in
the 10% most central collisions relative to peripheral collisions. Rcp varies
smoothly with centrality as characterized by the number of participating
nucleons. The observed suppression is only weakly dependent on jet radius and
transverse momentum. These results provide the first direct measurement of
inclusive jet suppression in heavy ion collisions and complement previous
measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables,
submitted to Physics Letters B. All figures including auxiliary figures are
available at
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02
Structureâactivity Relationships of Amyloid Beta-aggregation Inhibitors Based on Curcumin: Influence of Linker Length and Flexibility
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66293/1/j.1747-0285.2007.00557.x.pd
A multi-center study on the attitudes of Malaysian emergency health care staff towards allowing family presence during resuscitation of adult patients
BACKGROUND
The practice of allowing family members to witness on-going active resuscitation has been gaining ground in many developed countries since it was first introduced in the early 1990s. In many Asian countries, the acceptability of this practice has not been well studied.
AIM
We conducted a multi-center questionnaire study to determine the attitudes of health care professionals in Malaysia towards family presence to witness ongoing medical procedures during resuscitation.
METHODS
Using a bilingual questionnaire (in Malay and English language), we asked our respondents about their attitudes towards allowing family presence (FP) as well as their actual experience of requests from families to be allowed to witness resuscitations. Multiple logistic regression was used to analyze the association between the many variables and a positive attitude towards FP.
RESULTS
Out of 300 health care professionals who received forms, 270 responded (a 90% response rate). Generally only 15.8% of our respondents agreed to allow relatives to witness resuscitations, although more than twice the number (38.5%) agreed that relatives do have a right to be around during resuscitation. Health care providers are significantly more likely to allow FP if the procedures are perceived as likely to be successful (e.g., intravenous cannulation and blood taking as compared to chest tube insertion). Doctors were more than twice as likely as paramedics to agree to FP (p-value = 0.002). This is probably due to the Malaysian work culture in our health care systems in which paramedics usually adopt a 'follow-the-leader' attitude in their daily practice.
CONCLUSION
The concept of allowing FP is not well accepted among our Malaysian health care providers
A common variant near TGFBR3 is associated with primary open angle glaucoma
Primary open angle glaucoma (POAG), a major cause of blindness worldwide, is a complex disease with a significant genetic contribution. We performed Exome Array (Illumina) analysis on 3504 POAG cases and 9746 controls with replication of the most significant findings in 9173 POAG cases and 26 780 controls across 18 collections of Asian, African and European descent. Apart from confirming strong evidence of association at CDKN2B-AS1 (rs2157719 [G], odds ratio [OR] = 0.71, P = 2.81 Ă 10â33), we observed one SNP showing significant association to POAG (CDC7âTGFBR3 rs1192415, ORG-allele = 1.13, Pmeta = 1.60 Ă 10â8). This particular SNP has previously been shown to be strongly associated with optic disc area and vertical cup-to-disc ratio, which are regarded as glaucoma-related quantitative traits. Our study now extends this by directly implicating it in POAG disease pathogenesis
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