نتایج جستجو برای: ultra sonic

تعداد نتایج: 66870  

2013
Yousif I. Al-Mashhadany

Programmable logic control (PLC) has many definitions according to application or function. It is a device that has the ability to program and execute many processes at the same time and it has a wide range of applications in many scientific fields. This paper presents the design and analysis for a car speed measurement on a run away by using remote sensing sensor. This technique is implemented...

1998
Petra Perner

The availability of a variety of sophisticated data acquisition instruments has resulted in large repositories of imagery data in different applications like non-destructive testing, technical drawing, medicine, museums and so one. Effective extraction of visual features and contents is needed to provide meaningful index of and access to visual data. In this paper, we propose an image database ...

2001
HEPING LIU THOMAS FOKEN

Many new types of sonic anemometer obtain sonic temperature from an average value of temperature measured along three paths, unlike previous sonic anemometers that generally used one path. New equations are derived to calculate temperature variance from sonic temperature variance and sensible heat flux from buoyancy flux considering the influence of a crosswind. These equations can be applied t...

2012
C. S. Eschenazi C. F. B. Palmeira

Local 1-shock curve arcs and local reverse 2-shock curve arcs were constructed, in the geometric context of the wave manifold, in a previous paper. In that geometric context, sonic and sonic’ surfaces are the boundaries of admissible shock curve arcs; in order to introduce the concept of non-local 1-shock curve arcs and non-local reverse 2shock curve arcs it is necessary to understand how a hug...

Journal: :Developmental dynamics : an official publication of the American Association of Anatomists 1996
S A Ting-Berreth C M Chuong

Sonic hedgehog is involved in vertebrate tissue interactions during development. During early feather development, Sonic hedgehog appears very early in epithelial placodes. During late feather development, Sonic hedgehog expression precedes the development of the marginal plates and is specifically localized in the marginal plate epithelium, which will later undergo cell death. By using retrovi...

2011
Antti Jylhä

While the majority of studies in sonic interaction design (SID) focuses on sound as the output modality of an interactive system, the broad scope of SID includes also the use of sound as an input modality. Sonic gestures can be defined as sound-producing actions generated by a human in order to convey information. Their use as input in computational systems has been studied in several isolated ...

Journal: :Journal of the Brazilian Society of Mechanical Sciences and Engineering 2005

Journal: :Mechanisms of Development 2003
Kimiko Fukuda Takashi Kameda Kanako Saitoh Hideo Iba Sadao Yasugi

During the development of the proventriculus (glandular stomach) of the chicken embryo, the endodermal epithelium invades into the surrounding mesenchyme and forms glands. The glandular epithelial cells produce pepsinogen, while the non-glandular (luminal) epithelial cells secrete mucus. Sonic hedgehog is expressed uniformly in the proventricular epithelium before gland formation, but its expre...

2016
Ying Wang Yu Zhou Shuyu Zhou

We study the sonic horizon phenomena of the oscillating Bose-Einstein condensates in isotropic harmonic potential. Based on the Gross-Pitaevskii equation model and variational method, we derive the original analytical formula for the criteria and lifetime of the formation of the sonic horizon, demonstrating pictorially the interaction parameter dependence for the occur- rence of the sonic horiz...

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