The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
Luis J Villanuevarivera - One of the best experts on this subject based on the ideXlab platform.
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using automated Digital Recording systems as effective tools for the monitoring of birds and amphibians
Wildlife Society Bulletin, 2006Co-Authors: Miguel A Acevedo, Luis J VillanuevariveraAbstract:There is a need to improve the quantity and quality of data in biodiversity monitoring projects. We compared an automated Digital Recording system (ADRS) with traditional methods (point-counts and transects) for the assessment of birds and amphibians. The ADRS proved to produce better quantity and quality of data. This new method has 3 additional advantages: permanent record of a census, 24 h/d data collection and the possibility of automated species identification.
Scott H Woodward - One of the best experts on this subject based on the ideXlab platform.
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holographic particle image velocimetry from film to Digital Recording
Measurement Science and Technology, 2004Co-Authors: Hui Meng, Ye Pu, Scott H WoodwardAbstract:Holographic particle image velocimetry (HPIV) offers potentially the best solution to volumetric measurements of the three-dimensional velocity fields in complex flows. However, the traditional film-based HPIV measurement is rather cumbersome, limiting its use to only a handful of groups worldwide. The newly emerged Digital HPIV revolutionizes flow measurement science by providing a practical 3D velocimetry tool. It commands simple hardware that is similar to regular two-dimensional particle image velocimetry (PIV), yet it provides continuous (time-series) three-dimensional, three-component flow field data. Not only is the need for chemical processing eliminated, but also the cumbersome optical reconstruction is completely replaced by numerical reconstruction algorithms. Several breakthroughs have led to the development of the first practical and integrated Digital HPIV systems. To explain the transition from film to Digital Recording, fundamental issues in HPIV are reviewed in this paper. Axial accuracy in HPIV measurement is ultimately limited by an inherent depth-of-focus problem, while information capacity is limited by inherent speckle noise. Information capacity is an important concept in HPIV, comprising the maximum acceptable seeding density multiplied by the sample volume depth along the optic axis. Both the axial accuracy and the information capacity are limited by the effective hologram aperture. The pursuit of a large hologram aperture in the past has resulted in further complexity in film-based HPIV systems. Digital HPIV, on the other hand, enjoys great simplicity of implementation and operation. A Digital HPIV is also far more compact and rugged compared to existing film-based HPIV systems, making it suitable for duplication and commercialization. However, since Digital sensors suffer from inferior pixel resolutions compared to films, the effective hologram aperture is much smaller in Digital HPIV than that achievable in film-based HPIV. Alleviating this problem, Digital HPIV also presents new possibilities in data processing such as the use of the complex amplitude of the reconstructed light wave to improve depth sensitivity and signal-to-noise ratio. Two examples of Digital HPIV systems and measurement results are given. We believe Digital HPIV can revitalize holographic particle imaging and bring it into the mainstream in much the same way that Digital PIV brought PIV into widespread use a decade ago.
Miguel A Acevedo - One of the best experts on this subject based on the ideXlab platform.
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using automated Digital Recording systems as effective tools for the monitoring of birds and amphibians
Wildlife Society Bulletin, 2006Co-Authors: Miguel A Acevedo, Luis J VillanuevariveraAbstract:There is a need to improve the quantity and quality of data in biodiversity monitoring projects. We compared an automated Digital Recording system (ADRS) with traditional methods (point-counts and transects) for the assessment of birds and amphibians. The ADRS proved to produce better quantity and quality of data. This new method has 3 additional advantages: permanent record of a census, 24 h/d data collection and the possibility of automated species identification.
Tova Rainis - One of the best experts on this subject based on the ideXlab platform.
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Digital Recording and documentation of endoscopic procedures: physicians’ practice and perspectives
Israel Journal of Health Policy Research, 2019Co-Authors: Maya Peled-raz, Nadav Willner, Dan Shteinberg, Keren Or-chen, Tova RainisAbstract:Background In recent years, it has become increasingly prevalent internationally to record and archive Digital Recordings of endoscopic procedures. This emerging documentation tool raises weighty educational, ethical and legal issues – which are viewed as both deterrents and incentives to its adoption. We conducted a survey study aimed at evaluating the use of DRD in endoscopic procedures, to examine physicians’ support of this practice and to map the considerations weighed by physicians when deciding whether or not to support a more extensive use of DRD.
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Digital Recording and Documentation of Endoscopic Procedures: Do Patients and Doctors Think Alike?
Canadian Journal of Gastroenterology & Hepatology, 2016Co-Authors: Nadav Willner, Maya Peled-raz, Dan Shteinberg, Michal Shteinberg, Dean Keren, Tova RainisAbstract:Aims and Methods. Conducting a survey study of a large number of patients and gastroenterologists aimed at identifying relevant predictors of interest in Digital Recording and documentation (DRD) of endoscopic procedures. Outpatients presenting to the endoscopy unit at our institution for an endoscopy examination were anonymously surveyed, regarding their views and opinions of a possible Recording of the procedure. A parallel survey for gastroenterologists was conducted. Results. 417 patients and 62 gastroenterologists participated in two parallel surveys regarding DRD of endoscopic procedures. 66.4% of the patients expressed interest in Digital documentation of their endoscopic procedure, with 90.5% of them requesting a copy. 43.6% of the physicians supported Digital Recording while 27.4% opposed it, with 48.4% opposing to making a copy of the Recording available to the patient. No sociodemographic or background factors predicted patient’s interest in DRD. 66% of the physicians reported having Recording facilities in their institutions, but only 43.6% of them stated performing Recording. Having institutional guidelines for DRD was found to be the only significant predictor for routine Recording. Conclusions. Our study exposes patients’ positive views of Digital Recording and documentation of endoscopic procedures. In contrast, physicians appear to be much more reluctant towards DRD and are centrally motivated by legal concerns when opposing DRD, as well as when supporting it.
Hui Meng - One of the best experts on this subject based on the ideXlab platform.
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holographic particle image velocimetry from film to Digital Recording
Measurement Science and Technology, 2004Co-Authors: Hui Meng, Ye Pu, Scott H WoodwardAbstract:Holographic particle image velocimetry (HPIV) offers potentially the best solution to volumetric measurements of the three-dimensional velocity fields in complex flows. However, the traditional film-based HPIV measurement is rather cumbersome, limiting its use to only a handful of groups worldwide. The newly emerged Digital HPIV revolutionizes flow measurement science by providing a practical 3D velocimetry tool. It commands simple hardware that is similar to regular two-dimensional particle image velocimetry (PIV), yet it provides continuous (time-series) three-dimensional, three-component flow field data. Not only is the need for chemical processing eliminated, but also the cumbersome optical reconstruction is completely replaced by numerical reconstruction algorithms. Several breakthroughs have led to the development of the first practical and integrated Digital HPIV systems. To explain the transition from film to Digital Recording, fundamental issues in HPIV are reviewed in this paper. Axial accuracy in HPIV measurement is ultimately limited by an inherent depth-of-focus problem, while information capacity is limited by inherent speckle noise. Information capacity is an important concept in HPIV, comprising the maximum acceptable seeding density multiplied by the sample volume depth along the optic axis. Both the axial accuracy and the information capacity are limited by the effective hologram aperture. The pursuit of a large hologram aperture in the past has resulted in further complexity in film-based HPIV systems. Digital HPIV, on the other hand, enjoys great simplicity of implementation and operation. A Digital HPIV is also far more compact and rugged compared to existing film-based HPIV systems, making it suitable for duplication and commercialization. However, since Digital sensors suffer from inferior pixel resolutions compared to films, the effective hologram aperture is much smaller in Digital HPIV than that achievable in film-based HPIV. Alleviating this problem, Digital HPIV also presents new possibilities in data processing such as the use of the complex amplitude of the reconstructed light wave to improve depth sensitivity and signal-to-noise ratio. Two examples of Digital HPIV systems and measurement results are given. We believe Digital HPIV can revitalize holographic particle imaging and bring it into the mainstream in much the same way that Digital PIV brought PIV into widespread use a decade ago.