Purpose The EORTC Quality of Life Questionnaire is a widely used cancer-specific quality of life instrument comprising a core set of 30 items (QLQ-C30) supplemented by cancer site-specific modules.

The more crucial a physical law is, the more important it is to keep testing it. One of the most important laws formulated in the last century or so is Albert Einstein's principle of invariance, which ...

This is a preview. Log in through your library . Abstract This paper studies the invariant structure of the one-sided testing problem μ = 0 vs μ ≥ 0 in Np(μ, Σ) and it is shown that the requirement of ...

Measurement invariance is a fundamental property of educational assessments that ensures a given test or scale measures the intended construct consistently across different student groups, cultural ...

Lorentz invariance is fundamental to the special theory of relativity and the Standard Model of particle physics. The principle of Lorentz invariance states that the result of an experiment is ...