Introduction Many people believe that weather conditions, such as rain or barometric pressure, worsen joint or back pain, particularly among those with arthritis. Although previous studies have explored a variety of weather conditions and used detailed measures of joint pain, they were survey based, included small numbers of participants, and had mixed conclusions. We used data on millions of o...

If a drastic change in hearing has occurred in a child following a minor head trauma, change in barometric pressure, or physical exertion, large vestibular aqueduct syndrome (LVAS) should be considered. Most audiologists are unaware of LVAS or do not suspect it, in part due to the presence of a conductive component. LVAS can be seen in conjunction with Mondini's dysplasia or may appear by itsel...

We present a foot-mounted sensor system for pedestrian indoor and combined indoor/outdoor positioning. The proposed method is using a zero-velocity update scheme implemented as an Unscented Kalman filter. The technique employs a quaternion orientation representation and its performance is assessed using a custom developed sensor unit. The designed filter is tested against a more conventional Ex...

Both the high altitude physiologist and the intensivist are challenged by the human organism in a hypoxic environment. The variation in barometric pressure which occurs with latitude influences enormously the inspired oxygen concentration at extreme altitudes and can significantly effect performance. The cardiorespiratory changes which take place at high altitude, and in particular the putative...

The ascent of Mount Everest (altitude 8,848 m) by two climbers without supplementary oxygen in 1978 was a feat that astonished many physiologists; indeed, measurements of maximal oxygen uptake at lower altitudes suggested that it would be impossible. Data obtained in 1981 at extreme altitudes, including the summit itself, showed that man can tolerate the extreme hypoxia only by an enormous incr...

In two separate shallow field experiments, at two distance scales, we have used continuous monitoring to estimate the effect of barometric pressure on crosswell travel time and thereby calibrated the stress sensitivity of the rock volume between the wells. In a 3 m experiment we found a stress sensitivity of 10/Pa while in a 30 m experiment the sensitivity was 5 x 10 /Pa. Results from a deeper ...

Distinguishing sedentary from dynamic behavior is essential in addressing disease conditions that are influenced by mobility. Event-based activity recognition algorithms essentially rely on accurate classification of siting and standing postural transitions to distinguish whether the subject is sitting or standing. In this paper, the use of barometric pressure, to estimate altitude, is investig...