Results 31 to 40 of about 945,461 (308)

Measurement of Overlapping Leaf Area of Ice Plants Using Digital Image Processing Technique

Agriculture, 2022
Non-destructive and destructive leaf area estimation are critical in plant physiological and ecological experiments. In modern agriculture, ubiquitous digital cameras and scanners are primarily replacing traditional leaf area measurements.
Bolappa Gamage Kaushalya Madhavi, Anil Bhujel, Na Eun Kim, Hyeon Tae Kim   +3 more
doaj   +1 more source

ciliaFA : a research tool for automated, high-throughput measurement of ciliary beat frequency using freely available software [PDF]

, 2012
Background: Analysis of ciliary function for assessment of patients suspected of primary ciliary dyskinesia (PCD) and for research studies of respiratory and ependymal cilia requires assessment of both ciliary beat pattern and beat frequency.
C O’Callaghan, CL O’Callaghan, CM Smith, CW Wilson, EE Davis, G Mantovani, JH Sisson, JJ Ballenger, JR Kennedy, M Ryser, MA Chilvers, MA Chilvers, RA Hirst, RA Hirst, RA Hirst, S Dimova, TJ Mitchell, WA Stannard, WI Lee, WS Rasband   +19 more
core   +1 more source

Comparing Between Different Impressions Materials and Techniques for the Accuracy of Implant Position Transfer [PDF]

Al-Rafidain Dental Journal
Aims: This study aimed to compare the accuracy of implant position transfer using three impression materials with two techniques. Materials and methods: A master model was fabricated with two parallel dental implants at the first and second premolars ...
Ahmed Abduljawad Ismail Alubaidi, Nagham H Kassab, Hasan Khiraldeen Mohialdeen   +2 more
doaj   +1 more source

Coulomb crystal mass spectrometry in a digital ion trap [PDF]

, 2015
We present a mass spectrometric technique for identifying the masses and relative abundances of Coulomb-crystallized ions held in a linear Paul trap.
Deb, Nabanita, Heazlewood, Brianna R, Keller, Matthias, Pollum, Laura L, Rennick, Christopher J, Smith, Alexander D, Softley, Timothy P   +6 more
core   +2 more sources

High resolution measurements of the switching current in a Josephson tunnel junction: Thermal activation and macroscopic quantum tunneling

, 2002
We have developed a scheme for a high resolution measurement of the switching current distribution of a current biased Josephson tunnel junction using a timing technique.
A. Kemp, A. Lukashenko, A. V. Ustinov, A. Wallraff, Bocko M. F., C. Coqui, Han S., Jackel L. D., Larkin A. I., Martinis J. M., Pashkin Y. A., T. Duty, Turlot E., Wallraff A., Washburn S.   +14 more
core   +1 more source

Calibration of DAC mismatch errors in sigma delta ADCs based on a sine-wave measurement [PDF]

, 2013
We present an offline calibration procedure to correct the nonlinearity due element mismatch in the digital-to-analog converter (DAC) of a multibit Sigma Delta-modulation A/D converter.
De Bock, Maarten, Gielen, Georges, Rombouts, Pieter, Weyten, Ludo, Xing, Xinpeng   +4 more
core   +1 more source

Digital Techniques in Measurement Instrumentation

Measurement and Control, 1969
Data acquisition systems employing digital measuring and recording equipment are now being used in many scientific disciplines. To obtain maximum advantage from these systems it is essential to take into account considerations of the Sampling Theorem, the effects of a finite sampling aperture, and the various types of noise which can affect the signal
openaire   +2 more sources

Reliability of capturing foot parameters using digital scanning and the neutral suspension casting technique

Journal of Foot and Ankle Research, 2011
Background A clinical study was conducted to determine the intra and inter-rater reliability of digital scanning and the neutral suspension casting technique to measure six foot parameters.
Rome Keith, Annabell Mary-Ellen, Carroll Matthew   +2 more
doaj   +1 more source

Digital Flow Rate Measurement System Design for Minichannel based on Cross Correlation Technique [PDF]

Engineering and Technology Journal, 2017
In this paper, a demonstration for an experimental study to measure mean fluid velocity in minichannels is presented. Fluid flow velocity was estimated by applying cross correlation technique on measured thermal fluctuation using two ultra-small ...
H.A. Dhahad, E.M. Alfayydh, K.H. Fahem
doaj   +1 more source

Generalized lock-in amplifier for precision measurement of high frequency signals

, 2013
We herein formulate the concept of a generalized lock-in amplifier for the precision measurement of high frequency signals based on digital cavities. Accurate measurement of signals higher than 200 MHz using the generalized lock-in is demonstrated.
Edman, Fredrik, Fu, Siyuan, Karki, Khadga, Liu, Liang, Pullerits, Tõnu, Sakurai, Atsunori, Öwall, Viktor   +6 more
core   +1 more source