A nylon insert lock nut is hex shaped, internally threaded with a nylon insert. The nylon material prevents loosening from vibration and cross threads to stop the nut from backing off of the fastener. The insert deforms elastically over the threads of the screw, but threads are not cut into the nylon. The nylon insert locks the nut in two ways. First, it forces the bottom face of the screw threads against the top face of the nut threads, increasing the friction between the two. Second, the nylon applies a compressive force against the screw itself.
Searching clinical trial registries is an essential tool to improve the value of systematic reviews. This is a resource review on a paper that describes whether and how this is done in published systematic reviews of pharmacotherapy and assesses their quantitative impact on meta-analysis.
Charlotte and Sophie, final year medical students, discuss a recent Cochrane review assessing the effectiveness of interventions for medical students that aim to improve interpersonal communication in medical consultations.
Chris set up a student journal club in his first year of Physical Therapy training. In this blog, he describes how he started the club, how it has changed and expanded throughout his studies, and provides tips and suggested papers to get you started.
Conducting successful research requires choosing the appropriate study design. This article describes the most common types of designs conducted by researchers.
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This page provides a brief introduction to Cochrane and highlights some of the Cochrane platforms you can participate in, connect with, and learn from. Participate in Cochrane’s mission to produce and promote trusted health evidence.