The original article unfortunately contained a mistake.

BACKGROUND Accurate calculation of dosages and safe administration of medications in clinical practice is an essential skill for the registered nurse. Appropriate educational preparation of student nurses is the key to ensuring they become safe practitioners in the workforce. A review of the literature on different approaches for teaching and assessing medication calculation with student nurses...

In [1], the author studied the oscillation of forced neutral delay differential equations with positive and negative coefficients, having the following form: [x(t)− R(t)x(t − r)] + P(t)x(t − τ)− Q(t)x(t − σ) = f (t), (1) where R, P, Q ∈ C([t0,∞),R) with r > 0, τ ≥ σ ≥ 0. The readers are referred to [1] for further details. The author uses an ill representation which yields a mistake. To avoid t...

We present a generalization of the Perceptron algorithm. The new algorithm performs a Perceptron-style update whenever the margin of an example is smaller than a predefined value. We derive worst case mistake bounds for our algorithm. As a byproduct we obtain a new mistake bound for the Perceptron algorithm in the inseparable case. We describe a multiclass extension of the algorithm. This exten...