Diagnostic Accuracy of the Electrocardiogram for Heart Failure With Reduced or Preserved Ejection Fraction

Current heart failure (HF) guidelines recommend electrocardiography (ECG) as an essential initial investigation in a patient's workup. 1 However, these recommendations were based on studies primarily including patients with HF with reduced ejection fraction (HFrEF). 1 , 2 , 3 Guidelines do not distinguish HFrEF from HF with preserved and mid-range ejection fraction (HFpEF and HFmrEF) in their ECG recommendations. We hypothesized that a normal ECG does not exclude HFpEF and has a considerably lower sensitivity for diagnosing HFpEF than HFrEF

Racetrack mapping : Engaging students in mathematics and geography

Calvin Tromp and Rob Davis lead us through a mapping task that engages students in significant learning in the final weeks of the year: this paper reports on a classroom investigation of a sequence of cross-disciplinary mapping lessons undertaken by Grade Five students at Black Hill Primary, a Victorian State Primary School in BallaratC

Learning arithmetic blocks: a concrete model for teaching decimals

Copyright confirmation in progress. Any queries to [email protected] booklet is an introduction to using the LAB model with your students. It outlines a number of activities using LAB to assist students in gaining an understanding of the decimal number system

Lesson ideas and activities for teaching decimals

Copyright confirmation in progress. Any queries to [email protected] information regarding the book is available at http://staff.edfac.unimelb.edu.au/~kayecs/projects/decprojlink.htmThe Department of Science and Mathematics Education has produced this booklet to assist teachers with students learning to work confidently with decimal numbers. It contains many classroom activities that will motivate and engage students making the teaching and learning of decimals both enjoyable and effective

Reduced raindrop-impact driven soil erosion by infiltration

We used a simple laboratory experiment to investigate whether infiltration influences raindrop-impact induced soil erosion. There was substantially less erosion under infiltration conditions than with no infiltration. This was because a "shield" layer of deposited particles developed more rapidly under infiltration compared to "no-infiltration" conditions. Interestingly, the "shield" depth that fully protected the underlying soil from raindrop-impacts was shallower under infiltrating conditions. We found that the Rose soil erosion model captured the erosion dynamics well (R² ≈ 0.9). Predicting the "full-shield" depth remains unresolved. These results add evidence to previous studies indicating that saturated, slowly draining areas in the landscape are particularly susceptible to soil erosion from raindrop impact