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Two Stars Collided And Solved Half of Astronomy's Problems. Now What? - Slashdot
"It's hard to overstate the enormous leap forward that astronomy took on August 17, 2017," reports an article shared by schwit1:
On that day, astronomers bore witness to the titanic collision of two neutron stars, the densest things in the universe besides black holes. In the collision's wake, astronomers answered multiple major questions that have dominated their field for a generation. They solved the origin of gamma-ray bursts, mysterious jets of hardcore radiation that could potentially roast Earth. They glimpsed the forging of heavy metals, like gold and platinum. They measured the rate at which the expansion of the universe is accelerating. They caught light at the same time as gravitational waves, confirmation that waves move at the speed of light. And there was more, and there is much more yet to come from this discovery... "Now it's a question of, do we have the right instrumentation for doing all the follow-up work?" said Edo Berger, an astronomer at Harvard who studies explosive cosmic events. "Do we have the right telescopes? What's going to happen when we have not just one event, but one a month, or one a week -- how do we deal with that flood...?"
slashdot  stars  Astronomy  science  Gravity 
21 hours ago by gardencat
Calculating the optimum temperature for serving hot beverages. - PubMed - NCBI
“A linear (with respect to temperature) figure of merit merged the two effects to identify an optimal drinking temperature of approximately 136 degrees F (57.8 degrees C). The analysis points to a reduction in the presently recommended serving temperature of coffee to achieve the combined result of reducing the scald burn hazard and improving customer satisfaction.”
science  nih  coffee  tea  hot  temperature  2017 
yesterday by handcoding
Some Cochrane risk of bias items are not important in osteoarthritis trials: A meta-epidemiological study based on Cochrane reviews
Twenty reviews including 126 OA trials with a high degree of heterogeneity was included (τˆ2=0.1247). Among RoB domains only patient blinding had an impact on the results (reducing heterogeneity according to τˆ2 <7%). Inadequate blinding of patients yielded larger effects (SMDDifference = 0.15; 95% CI: 0.11 to 0.29, P=0.035). The most important study characteristic was trial size (heterogeneity reduced by 25%), with small trials reporting larger effects (SMDDifference = 0.29; 95% CI: 0.16 to 0.42, P<0.001).
Science  RiskOfBias 
yesterday by pwhaley
Flaws in the application and interpretation of statistical analyses in systematic reviews of therapeutic interventions were common: a cross-sectional analysis
When considering the index (primary or first reported) meta-analysis of each SR, just over half (62/110 [56%]) used the random-effects model, but few (5/62 [8%]) interpreted the meta-analytic effect correctly (as the average of the intervention effects across all studies). A statistical test for funnel plot asymmetry was reported in 17/110 (15%) SRs, however, in only 4/17 (24%) did the test include the recommended number of at least 10 studies of varying size. Subgroup analyses accompanied 42/110 (38%) index meta-analyses, but findings were not interpreted with respect to a test for interaction in 29/42 (69%) cases, and the issue of potential confounding in the subgroup analyses was not raised in any SR.
Science  StatsMethods 
yesterday by pwhaley
Between-trial heterogeneity in meta-analyses may be partially explained by reported design characteristics
Our interpretation of the results is limited by imprecise estimates. There is some indication that between-trial heterogeneity could be partially explained by reported design characteristics, and hence adjustment for bias could potentially improve accuracy of meta-analysis results.
Science  RiskOfBias 
yesterday by pwhaley
Differences between protocols for randomized controlled trials and systematic reviews
How to game a protocol? Although we fully acknowledge the potential benefits of protocols for SRs, it is important to point out that there is a clear difference between protocols for SRs when compared to protocols for RCTs.
Science  SRStandards  Protocol 
yesterday by pwhaley

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