Abstract: Aspects relate to calculating energy expenditure values from an apparatus configured to be worn on an appendage of a user. Steps counts may be quantified, such as by detecting arm swings peaks and bounce peaks in motion data. A search range of acceleration frequencies related to an expected activity may be established. Frequencies of acceleration data within a search range may be analyzed to identify one or more peaks, such as a bounce peak and an arm swing peak. Novel systems and methods may determine whether to utilize the arm swing data, bounce data, and/or other data or portions of data to quantify steps. The number of peaks (and types of peaks) may be used to choose a step frequency and step magnitude. At least a portion of the motion data may be classified into an activity category based upon the quantification of steps.

Abstract: An adjustable base for attaching a sighting device such as a telescopic sight to a rifle or other ballistic projectile launcher, comprising upper and lower rails pivotally attached at the muzzle ends thereof, is disclosed. Adjustments are provided for altering the angle between the sight and the weapon's boreline or similar axis in elevation in increments of minutes of arc or fractions thereof.