نتایج جستجو برای: aperture size

تعداد نتایج: 581310  

Journal: :American journal of physical anthropology 2002
Antonio Rosas Markus Bastir

The relationship between allometry and sexual dimorphism in the human craniofacial complex was analyzed using geometric morphometric methods. Thin-plate splines (TPS) analysis has been applied to investigate the lateral profile of complete adult skulls of known sex. Twenty-nine three-dimensional (3D) craniofacial and mandibular landmark coordinates were recorded from a sample of 52 adult female...

Journal: :Journal of neurophysiology 2002
Alice C Roy Yves Paulignan Martine Meunier Driss Boussaoud

Prehension movements were examined in freely behaving monkeys and compared with the well-known characteristics of human movements. The degree of independence of the components of movements (i.e., reaching and grasping) was investigated in animals trained to reach for and grasp three-dimensional objects. To this aim, the kinematics of prehension movements was recorded using an Optotrak system in...

Journal: :Ground water 1999
S Nakao J Najita K Karasaki

Cluster variable aperture (CVA) simulated annealing has been used as an inversion technique to construct fluid flow models of fractured formations based on transient pressure data from hydraulic tests. A two-dimensional fracture network system is represented as a filled regular lattice of fracture elements. The algorithm iteratively changes element apertures for a cluster of fracture elements i...

2005
A. Persaud T. Schenkel E. O. Lawrence J. Bokor

We describe a scanning probe instrument which integrates ion beams with the imaging and alignment function of a piezo-resistive scanning probe in high vacuum. The beam passes through several apertures and is finally collimated by a hole in the cantilever of the scanning probe. The ion beam spot size is limited by the size of the last aperture. Highly charged ions are used to show hits of single...

Journal: :Biomedical optics express 2016
Xin Yuan Shuo Pang

We present a compressive video microscope based on structured illumination with incoherent light source. The source-side illumination coding scheme allows the emission photons being collected by the full aperture of the microscope objective, and thus is suitable for the fluorescence readout mode. A 2-step iterative reconstruction algorithm, termed BWISE, has been developed to address the mismat...

Journal: :Arabian Journal of Geosciences 2021

Four hundred eighty sandstone core samples obtained from three different hydrocarbon charged formations of geologic ages (Pliocene; Miocene and Cretaceous) geographic locations (Egypt Hungary) are used to correlate the effective pore aperture size adopted by Winland (r35) new r36 present work. These percentiles (r35 r36) calculated with empirical equations correlated each other declare which on...

Journal: :Cortex; a journal devoted to the study of the nervous system and behavior 2012
Rocco Y-C Chiou Denise H Wu Ovid J-L Tzeng Daisy L Hung Erik C Chang

Previous research found that quantitative information labelled on target objects of grasping movement modulates grip apertures. While the interaction between numerical cognition and sensorimotor control may reflect a general representation of magnitude underpinned by the parietal cortex, the nature of this embodied cognitive processing remains unclear. In the present study, we examined whether ...

Medical ultrasound imaging due to close behavior of cancer tumors to body tissues has a low contrast. This problem with synthetic aperture imaging method has been addressed. Although the synthetic aperture imaging technique solved the low-contrast problem of ultrasound images, to an acceptable limit, but the performance of these methods is not even acceptable when the signal to noise ratio (SNR...

2017
Man Zhang Guanyong Wang Lei Zhang

Precise azimuth-variant motion compensation (MOCO) is an essential and difficult task for high-resolution synthetic aperture radar (SAR) imagery. In conventional post-filtering approaches, residual azimuth-variant motion errors are generally compensated through a set of spatial post-filters, where the coarse-focused image is segmented into overlapped blocks concerning the azimuth-dependent resi...

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