نتایج جستجو برای: annulus

تعداد نتایج: 6329  

Journal: :Perception & psychophysics 1993
L E Arend B Spehar

Changes of annulus luminance in traditional disk-and-annulus patterns can be perceived to be either reflectance or illuminance changes. In the present experiments, we examined the effect of varying annulus reflectance. In Experiment 1, we placed test and standard patch-and-surround patterns in identical Mondrian patchworks. Only the luminance of the test surround changed from trial to trial, ap...

The paper is concerned with the bifurcation of limit cycles in general quadratic perturbations of a quadratic reversible and non-Hamiltonian system, whose period annulus is bounded by an elliptic separatrix related to a singularity at infinity in the poincar'{e} disk. Attention goes to the number of limit cycles produced by the period annulus under perturbations. By using the appropriate Picard...

Journal: :bulletin of the iranian mathematical society 0
l. peng school of mathematics and system sciences, beihang university y. lei school of mathematics and system sciences, beihang university/the 24th middle school of beijing

the paper is concerned with the bifurcation of limit cycles in general quadratic perturbations of a quadratic reversible and non-hamiltonian system, whose period annulus is bounded by an elliptic separatrix related to a singularity at infinity in the poincar'{e} disk. attention goes to the number of limit cycles produced by the period annulus under perturbations. by using the appropriate p...

2015
Thassadite Dirami Baptiste Rode Jean-Philippe Wolf Gérard Gacon Emmanuel Dulioust Aminata Touré

BACKGROUND The annulus is a ring-shaped structure located beneath the plasma membrane that connects the midpiece and the principal piece of mammalian sperm flagellum. It has been suggested that the annulus acts as a morphological organizer, guiding flagellum assembly during spermiogenesis, and as a diffusion barrier, confining proteins to distinct compartments of the flagellum in mature sperm. ...

Journal: :international clinical neurosciences journal 0
midiya khademi m.sc. department of biomedical engineering, tehran north branch, islamic azad university, tehran, iran. yousef mohammadi ph.d. student of biomechanical engineering, biomechanics department, biomedical engineering faculty, amirkabir university of technology, tehran, iran. seifollah gholampour deptartment of bimedical engineering, tehran north branch, islamic azad university, tehran, iran nasser fatouraee ph.d. associate professor of biomechanical engineering, biological fluid mechanics research laboratory, biomechanics department, biomedical engineering faculty, amirkabir university of technology.

background: spine of an adult is made up of five areas that include 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, sacrum and finally coccyx. selecting appropriate assumptions for modeling and biological analysis of the spine components has a significant impact on the accuracy of results in biomechanical simulation for different modes. methods: in the present study, biomechani...

Journal: :energy equipment and systems 2015
hadi imani ali cheraqi ali jafarian mohammad mahdi heyhat

laminar mixed convection of aluminium oxide (al2o3)–water nanofluid flow in an inclined annulus using a single-phase approach was numerically studied. constant heat flux boundary conditions were applied on the inner and outer walls. all the thermophysical properties of nanofluid, such as, viscosity, heat capacity, thermal conductivity, and thermal expansion coefficient, except density in the bo...

2006
Dapeng Zhan

An annulus SLEκ trace tends to a single point on the target circle, and the density function of the end point satisfies some differential equation. Some martingales or local martingales are found for annulus SLE4, SLE8 and SLE8/3. From the local martingale for annulus SLE4 we find a candidate of discrete lattice model that may have annulus SLE4 as its scaling limit. The local martingale for ann...

Reza Rooki

Underbalanced drilling as multiphase flow is done in oil drilling operation in low pressure reservoir or highly depleted mature reservoir. Correct determination of the pressure loss of three phase fluids in drilling annulus is essential in determination of hydraulic horsepower requirements during drilling operations. In this paper the pressure loss of solid-gas-liquid three-phase fluids flow in...

Journal: :Perceptual and motor skills 2015
Mitsuhiko Hanada

The sensation of being dazzled by light was investigated, and the effects of colors on the feeling were assessed using stimuli composed of a disk and a surrounding annulus with luminance gradient, which had a glowing appearance. The colors of the disk and annulus were varied, while the luminance of each pixel was unchanged. In addition, disk and maximum annulus luminances were also varied. Ten ...

Journal: :Circulation 2001

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید