The Use of “Exploding Wires” as a Light Source of Very High Intensity and Short Duration

1951 ◽  
Vol 41 (7) ◽  
pp. 445 ◽  
Author(s):  
William M. Conn
Keyword(s):  
Light Source ◽  
Short Duration ◽  
High Intensity ◽  
Exploding Wires ◽  
Very High

Rating Perceived Exertion during Short Duration, Very High Intensity Cycle Exercise

2005 ◽  
Vol 100 (3) ◽  
pp. 767-773 ◽  
Author(s):  
Randall F. Gearhart ◽  
M. Daniel Becque ◽  
Chad M. Palm ◽  
Matthew D. Hutchins
Keyword(s):  
Resistance Exercise ◽  
Short Duration ◽  
High Resistance ◽  
High Intensity ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Cycle Exercise ◽  
Low Resistance ◽  
Resistance Exercises ◽  
Very High

This study compared undifferentiated ratings of perceived exertion (RPE) during short duration, very high intensity cycle exercise using high and low resistance. 30 recreationally trained males (24.2 ± 2.4 yr.) were memory-anchored to the Borg 15-category scale. The high and low resistance exercises were defined by 30-sec. maximum tests assigned in counterbalanced order, with resistances set before testing during an orientation session. High resistance was 10% of body mass. Low resistance resulted in the same total work as the high resistance over the 30-sec. sessions (± 5%) but increased pedal rate. RPE was taken at 8, 13, 18, 23, and 28 sec. during the high and the low resistance exercises. Measurements were compared using a 2-way repeated-measures analysis of variance. RPE was significantly greater ( p = .005) for the high than the low resistance exercise at each interval. RPE increased when the subjects were required to pedal against a greater resistance and produce the highest forces. These RPE data are consistent with data from both aerobic cycle and resistance exercise. The data suggest that instantaneous force production, not summed work, is a primary determinant of RPE. All of these observations support Cafarelli's theoretical model of effort sense. In conclusion, as an individual generates more force during high resistance exercise than in light resistance exercise, a potential explanation of our results is that the increased motor outflow and corollary sensory signal lead to a greater sense of effort.

A High Intensity Short Duration Spark Light Source

1950 ◽  
Vol 21 (12) ◽  
pp. 1269-1271 ◽  
Author(s):  
J. A. Fitzpatrick ◽  
J. C. Hubbard ◽  
W. J. Thaler
Keyword(s):  
Light Source ◽  
Short Duration ◽  
High Intensity

Factors Influencing Blood Alkalosis and Other Physiological Responses, Gastrointestinal Symptoms, and Exercise Performance Following Sodium Citrate Supplementation: A Review

2020 ◽  
pp. 1-19
Author(s):  
Charles S. Urwin ◽  
Rodney J. Snow ◽  
Dominique Condo ◽  
Rhiannon Snipe ◽  
Glenn D. Wadley ◽  
...  
Keyword(s):  
Short Duration ◽  
Exercise Performance ◽  
High Intensity ◽  
Sodium Citrate ◽  
Physiological Responses ◽  
Gastrointestinal Symptoms ◽  
High Intensity Exercise ◽  
Similar Frequency ◽  
Gi Symptoms ◽  
Very High

This review aimed to identify factors associated with (a) physiological responses, (b) gastrointestinal (GI) symptoms, and (c) exercise performance following sodium citrate supplementation. A literature search identified 33 articles. Observations of physiological responses and GI symptoms were categorized by dose (< 500, 500, and > 500 mg/kg body mass [BM]) and by timing of postingestion measurements (in minutes). Exercise performance following sodium citrate supplementation was compared with placebo using statistical significance, percentage change, and effect size. Performance observations were categorized by exercise duration (very short < 60 s, short ≥ 60 and ≤ 420 s, and longer > 420 s) and intensity (very high > 100% VO2max and high 90–100% VO2max). Ingestion of 500 mg/kg BM sodium citrate induced blood alkalosis more frequently than < 500 mg/kg BM, and with similar frequency to >500 mg/kg BM. The GI symptoms were minimized when a 500 mg/kg BM dose was ingested in capsules rather than in solution. Significant improvements in performance following sodium citrate supplementation were reported in all observations of short-duration and very high–intensity exercise with a 500 mg/kg BM dose. However, the efficacy of supplementation for short-duration, high-intensity exercise is less clear, given that only 25% of observations reported significant improvements in performance following sodium citrate supplementation. Based on the current literature, the authors recommend ingestion of 500 mg/kg BM sodium citrate in capsules to induce alkalosis and minimize GI symptoms. Supplementation was of most benefit to performance of short-duration exercise of very high intensity; further investigation is required to determine the importance of ingestion duration and timing.

Improvement of the Detection Sensitivity of Edxrf Trace Element Analysis by Means of Efficient X-Ray Focusing Based on Strongly Curved Hopg Crystals

1995 ◽  
Vol 39 ◽  
pp. 109-117
Author(s):  
Burkhard Beckhoff ◽  
Birgit Kanngießer
Keyword(s):  
High Intensity ◽  
Focal Plane ◽  
Bragg Reflection ◽  
Pyrolytic Graphite ◽  
Trace Element Analysis ◽  
Detection Sensitivity ◽  
Element Analysis ◽  
X Ray ◽  
Wide Range ◽  
Very High

X-ray focusing based on Bragg reflection at curved crystals allows collection of a large solid angle of incident radiation, monochromatization of this radiation, and condensation of the beam reflected at the crystal into a small spatial cross-section in a pre-selected focal plane. Thus, for the Bragg reflected radiation, one can achieve higher intensities than for the radiation passing directly to the same small area in the focal plane. In that case one can profit considerably from X-ray focusing in an EDXRF arrangement. The 00 2 reflection at Highly Oriented Pyrolytic Graphite (HOPG) crystals offers a very high intensity of the Bragg reflected beam for a wide range of photon energies. Furthermore, curvature radii smaller than 10 mm can be achieved for HOPG crystals ensuring efficient X-ray focusing in EDXRF applications. For the trace analysis of very small amounts of specimen material deposited on small areas of thin-filter backings, HOPG based X-ray focusing may be used to achieve a very high intensity of monochromatic excitation radiation.

Chronic ?-blockade does not influence muscle power output during high-intensity exercise of short-duration

1993 ◽  
Vol 67 (5) ◽  
pp. 415-419 ◽  
Author(s):  
Wayne E. Derman ◽  
Fiona Dunbar ◽  
Matt Haus ◽  
Mike Lambert ◽  
Timothy D. Noakes
Keyword(s):  
Short Duration ◽  
Power Output ◽  
High Intensity ◽  
Muscle Power ◽  
High Intensity Exercise ◽  
Muscle Power Output

Fast ignition by laser driven particle beams of very high intensity

2007 ◽  
Vol 14 (7) ◽  
pp. 072701 ◽  
Author(s):  
H. Hora ◽  
J. Badziak ◽  
M. N. Read ◽  
Yu-Tong Li ◽  
Tian-Jiao Liang ◽  
...  
Keyword(s):  
High Intensity ◽  
Fast Ignition ◽  
Particle Beams ◽  
Very High

The Effect of Short-duration, High-intensity Electromagnetic Pulses on Fresh Ulnar Fractures in Rats

2002 ◽  
Vol 49 (1) ◽  
pp. 33-37 ◽  
Author(s):  
S. LEISNER ◽  
R. SHAHAR ◽  
I. AIZENBERG ◽  
D. LICHOVSKY ◽  
T. LEVIN-HARRUS
Keyword(s):  
Short Duration ◽  
High Intensity ◽  
Electromagnetic Pulses
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