Results 261 to 270 of about 3,454,711 (304)
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Lock-in amplifier based peak force infrared microscopy
The Analyst, 2023Peak Force Infrared (PFIR) microscopy enables label-free chemical imaging with a spatial resolution below Abbe's diffraction limit through the integration of atomic force microscopy and infrared radiation.
Andrea Dorsa +3 more
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Peak dynamic force in human gait
Journal of Biomechanics, 1981Abstract Studies were made of the forces generated at heel stroke in human gait using both force plates having a high resonant frequencies (capable of picking up high frequency components in the contact force) as well as a force transducer inserted into the heel of the shoe of the subjects.
S R, Simon +5 more
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Peak force tapping atomic force microscopy for advancing cell and molecular biology
Nanoscale, 2021Recent advances in peak force tapping (PFT)-based atomic force microscopy (AFM) imaging for applications in cell and molecular biology are summarized. Future perspectives for future progression and biomedical applications are provided.
Mi Li, Ning Xi, Lianqing Liu
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Verbal Estimation of Peak Force
Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 2001This study investigated the precision and accuracy with which individuals could estimate the magnitude of submaximal, upper extremity forceful exertions over a range of tasks typical of occupational/industrial settings. Without training, the average estimation errors were 15.3, 23.2, and 11.8%Max for low, medium, and high levels of force, respectively.
Matthew M. Marshall +2 more
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Peak-To-Average Power Ratio Reduction by Zero Forcing Peaks
2006 IEEE International Multitopic Conference, 2006One of main drawback of orthogonal frequency division multiplexing (OFDM) is high peak to average power ratio (PAPR) which causes non-linearity at power amplifier stage. In this paper a new technique for reducing PAPR of the OFDM signal is implemented. This method does not spread the OFDM signal bandwidth and no additional IFFT has to be performed thus
Seema Khalid, Syed Ismail Shah
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A force sensor and peak-reading recorder for measurement of cervical dilatation force
Journal of Biomedical Engineering, 1984Earlier dilatation force-sensing transducers, when subjected to side loads, suffered frictional losses which affected their accuracy. This new instrument incorporates a thermal-writing chart recorder and a digital readout of the peak force during dilatation of the cervix.
A J, Crawford +4 more
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Total Internal Reflection Peak Force Infrared Microscopy
Analytical Chemistry, 2020Total internal reflection (TIR) infrared spectroscopy is a convenient measurement tool for collecting spectra for chemical identification. However, TIR infrared microscopy lacks high spatial resolution due to the optical diffraction limit and difficulty to preserve a high-quality wave front for focus. In this article, we present the peak force infrared
Haomin Wang +4 more
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Relationship Between Isokinetic Average Force, Average Torque, Peak Force, and Peak Torque of the Knee Extensor and Flexor Musculature [PDF]
Isokinetics and Exercise Science, 1994 The purpose of this study was to determine the relationship between average force, average torque, peak force, and peak torque produced by the knee musculature. Twenty women were assessed for isokinetic concentric and eccentric knee extensor and flexor muscular strength at a velocity of 90 deglsec.
Tis, Laurie L., Perrin, David H.
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Principle and Application of Peak Force Tapping Mode Atomic Force Microscope
2021Unlike conventional optical and electron microscopies, atomic force microscopy (AFM) characterizes the properties of samples at high resolution by controlling and detecting the interaction between the tip and the sample. The basic working principle of AFM is briefly described.
Shoujin Wang, Chunxue Hao
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Vertical peak ground force in human infant crawling
Gait & Posture, 2013Quadrupedalism is a common mode of locomotion in land animals. The load distribution between the forelimbs (FL) and hindlimbs (HL) in quadrupedalism has been of great interest to researchers, and a database of the vertical peak force (Vpk) for FL and HL has been created for various species. However, Vpk in human infant crawling, a natural form of human
Arito, Yozu +5 more
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