0000000000244208
AUTHOR
Jonas Persson
Development of a Chemistry Concept Inventory for General Chemistry Students at Norwegian and Finnish Universities
A Chemistry concept inventory has been developed for assessing students’ learning and identifying alternative conceptions that students may have in general chemistry. The inventory aims at functioning as a tool for adjusting teaching practices in chemistry and is mainly aimed at assessing students’ learning during general chemistry courses. The inventory was administered as a post-test in a general chemistry course at the Norwegian University of Science and Technology (NTNU) in spring 2015, and evaluated using different statistical tests, focusing both on item analysis and the test as a whole. The results from this analysis indicated that the concept inventory is a reliable and discriminati…
Influenza Vaccination After Myocardial Infarction:A Randomized, Double-Blind, Placebo-Controlled, Multicenter Trial
Background: Observational and small, randomized studies suggest that influenza vaccine may reduce future cardiovascular events in patients with cardiovascular disease. Methods: We conducted an investigator-initiated, randomized, double-blind trial to compare inactivated influenza vaccine with saline placebo administered shortly after myocardial infarction (MI; 99.7% of patients) or high-risk stable coronary heart disease (0.3%). The primary end point was the composite of all-cause death, MI, or stent thrombosis at 12 months. A hierarchical testing strategy was used for the key secondary end points: all-cause death, cardiovascular death, MI, and stent thrombosis. Results: Because of the COV…
A Fatty Acid Based Bayesian Approach for Inferring Diet in Aquatic Consumers
We modified the stable isotope mixing model MixSIR to infer primary producer contributions to consumer diets based on their fatty acid composition. To parameterize the algorithm, we generated a 'consumer-resource library' of FA signatures of Daphnia fed different algal diets, using 34 feeding trials representing diverse phytoplankton lineages. This library corresponds to the resource or producer file in classic Bayesian mixing models such as MixSIR or SIAR. Because this library is based on the FA profiles of zooplankton consuming known diets, and not the FA profiles of algae directly, trophic modification of consumer lipids is directly accounted for. To test the model, we simulated hypothet…