Previous hemodynamic studies of patients with septal defects, or patent ductus arteriosus, have been made with the patient recumbent in the horizontal posture. Our studies indicate unexpected changes in pulmonary blood flow with the upright posture, and often further increments in flow during walking that are different from those reported for exercise in recumbency. It is suggested that such de...

Falls cause substantial death and morbidity in the elderly. An important prerequisite to the development of fall prevention interventions is improved understanding of the biomechanical and neuromuscular variables that govern ability to recover balance. In the present study, we examined the relative importance of strength versus speed of response variables in explaining differences in balance re...

A 16-year-old Class II female patient was treated without tooth extraction. The upper first molars were distalized by the Pendulum appliance. After six months, the molars tipped significantly to the distal. To correct this side effect, we decided to upright the molars using skeletal anchorage. On each side, a mini-screw was inserted between first and second premolars in the buccal cortical plat...

Left ventricular (LV) performance at rest and during multilevel exercise in the supine and upright positions was studied in seven normal subjects with equilibrium radionuclide ventriculography. The mean left ventricular end-diastolic volume (LVEDV) during supine rest was 107 4 10 ml (± SEM) and 85 ± 6 ml (p < 0.02) in the upright position; the mean resting left ventricular end-systolic volumes ...

Decreased upright cerebral blood flow (CBF) with hyperpnea and hypocapnia is seen in a minority of patients with postural tachycardia syndrome (POTS). More often, CBF is not decreased despite upright neurocognitive dysfunction. This may result from time-dependent changes in CBF. We hypothesized that increased oscillations in CBF occurs in POTS (N = 12) compared to healthy controls (N = 9), and ...

A large (> 200-cm diameter) coast redwood (Sequoia sempervirens) stump occurring upright on an Oregon beach, 257 km from the northern limit of its native distribution, may be a remnant of an extinct disjunct population or it may be the result of vertical emplacement of a drift log. Holocene tree stumps in situ in paleosols commonly emerge on the shore platform as a result of a complex history o...

Over the past few decades, there have been significant technological advancements in field of robots, particularly area mobile robots. The performance standards speed, accuracy, and stability become key indicators progress robotic technology. Self-balancing robots are designed to maintain an upright position without toppling over. By continuously adjusting their center mass, they can even when ...

The monomolecular organization of the main tetraether phospholipid from the archaeon Thermoplasma acidophilum was studied by means of a Langmuir film balance integrated into a fluorescence microscope. After transfer to solid surfaces at different pressures the films were further investigated by ellipsometry, small angle X-ray scattering and atomic force microscopy. In order to complete former r...

Cvecka, J., Cacek, J. & Ondracek, J. (2014). Agings and the parameters in static postural way. J. Hum. Sport Exerc., 9(Proc1), pp.S533-S537. There is strong scientific evidence from research trials that aging is associated with loss of muscle mass and decline of neuromuscular abilities. Postural stability is an important neuromuscular ability for the maintenance of upright posture as well as ma...