Results 241 to 250 of about 690,254 (288)

Expiration rate drives human airway design

Journal of Theoretical Biology, 2008
Analyses of human airway architecture based on calculations of airflow resistance or energy dissipation suggest that the branching pattern is not optimized for minimizing energy loss by flow dissipation during respiration. Airway flow dissipates only a few percent of the total body work during normal breathing, so branching patterns deviate from ...
Dongyoub, Lee, Anthony S, Wexler, Michelle V, Fanucchi, Charles G, Plopper   +3 more
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Psychological Rating of Human Fatigue

Ergonomics, 1971
Abstract A factor-analytic study was carried out in order to construct a fatigue rating scale (FR scale) which allows a judgement of human fatigue through a person's appearance. Twenty-eight items for the prospective FR scale were prepared, combined with 20 items of a fatigue scale (F scale) which had boon factor-analytically classified into two groups,
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Growth rate of human pituitary adenomas

Journal of Neurosurgery, 1987
✓ The immunohistological detection of a proliferation-associated nuclear antigen by the monoclonal antibody Ki-67 allows the determination of the growth fraction in human cell populations. In this study, biopsy specimens of 31 pituitary adenomas representing all major endocrine types were examined.
A M, Landolt, T, Shibata, P, Kleihues
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Central dogma rates in human mitochondria

Human Molecular Genetics
Abstract In human cells, the nuclear and mitochondrial genomes engage in a complex interplay to produce dual-encoded oxidative phosphorylation (OXPHOS) complexes. The coordination of these dynamic gene expression processes is essential for producing matched amounts of OXPHOS protein subunits.
Erik McShane, L Stirling Churchman
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Limits to sustainable human metabolic rate

Journal of Experimental Biology, 2001
SUMMARYThere is a limit to the performance of an organism set by energy intake and energy mobilization. Here, the focus is on humans with unlimited access to food and for whom physical activity can be limited by energy mobilization. The physical activity level (PAL) in the general population, calculated as doubly-labelled-water-assessed average daily ...
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Human Heart Rate during Anxiety

Perceptual and Motor Skills, 1958
When anxiety is induced experimentally by signals of shock-to-come, two opposing effects on human heart rate have been observed. Somecimes the heart decelerates; somecirnes it accelerates. Typical of the deceleration findings is the paper of Notcerman, Schoenfeld, and Bersh (3).
George E. Deane, David Zeaman
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Human biological decline and mortality rates

Mechanisms of Ageing and Development, 1997
Intercepts on the x (age)-axis of 107 normalized declining human biological functions were determined and assembled in 3 histograms, being placed in increasing order within each decade (10 year period). The histograms were classed accordingly as they contained properties associated with dividing cells, sensory properties and non-dividing cells ...
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Perspectives on Spacecraft Human-Rating

42nd International Conference on Environmental Systems, 2012
The term ‘human-rated’ is typically used to differentiate the increased safety requirements imposed on crewed spacecraft relative to unmanned satellites, including the launch vehicle as an integrated element. At a fundamental level, human-rating attempts to ensure the vehicle(s) and mission are designed to ‘accommodate, protect, and utilize’ the crew ...
David Klaus, Christine Fanchiang, Robert Ocampo   +2 more
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Human Heart Rate Detection Application

2017 International Conference on Soft Computing, Intelligent System and Information Technology (ICSIIT), 2017
Modern daily activities make some people have difficulty to care about his health. Urban air pollution, work pressure, and irregular diet increase the risk of such a person to become infected. In fact, some of the diseases would not cause any symptoms prior to severe ones. One of them is the coronary heart disease. According to a study conducted by the
Semuil Tjiharjadi, Aufar Fajar
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Revising the human mutation rate: implications for understanding human evolution

Nature Reviews Genetics, 2012
It is now possible to make direct measurements of the mutation rate in modern humans using next-generation sequencing. These measurements reveal a value that is approximately half of that previously derived from fossil calibration, and this has implications for our understanding of demographic events in human evolution and other aspects of population ...
Aylwyn, Scally, Richard, Durbin
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