In order to improve the measurement accuracy of the linear CCD in the intersection of vertical target measurement system, the calibration model of linear CCD’s internal parameters is established and the various factors that affect the accuracy in the calibration process are analyzed. Making use of the linear CCD imaging optical principle, the optical center and the effective focal length are ca...

The fovea centralis is a closely-packed vertical array of inverted-cone photoreceptor cells located in the retina that is responsible for high acuity binocular vision. The cones are operational in well-lit environments and are responsible for trapping the impinging illumination. We present the vertical light-funnel silicon array as a light-trapping technique for photovoltaic applications that i...

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this study describes the design, construction and calibration of an adjustable three-point hitch dynamometer. the dynamometer frame design was based on an inverted u-shaped frame that was mounted between the tractor links and implement. the dynamometer frame design allows for use in both category i and ii three-point hitch systems because of its flexibility in a lower point hitch spread and mas...

We consider a two-link biped, a three-link biped, and a five-link planar biped without feet (with “point feet”). Their ankles are not actuated. The control torques are applied to the bipeds in the inter-link joints only. Then this family of bipeds is under actuated when only one leg tip touches the ground. It is difficult to control the walking of this kind of bipeds because they are statically...

This paper describes a fast technique for estimating the dark signals of charge coupled devices (CCDs) visible telescope (VT) onboard space multi-band variable object monitor (SVOM). It is based on vertical gradient in field images frame transfer CCDs. During process clear, exposure, and readout, characteristic signal accumulation analyzed firstly. Next, linear fitting method used to fit level ...

Meltran V, a new biped robot with telescopic legs, is introduced. For 3D walking control of the robot we analyze the dynamics of a three-dimensional inverted pendulum in which motion is constrained to move along an arbitrarily de ned plane. From this analysis we obtain simple linear dynamics, the ThreeDimensional Linear Inverted Pendulum Mode (3DLIPM). Using a real-time control method based on ...

The viewpoint aftereffect is a perceptual illusion that, after adapting to an object/face viewed from one side (e.g., 30 degrees to the left of center), when the same object/face is subsequently presented near the front view, the perceived viewing direction is biased in a direction opposite to that of the adapted viewpoint (e.g., 2 degrees to the right). In this study, we measured the face view...

tooth impaction rarely occurs in primary dentition. most of the primary teeth impactions are seen in second molars. the purpose of this article is to present a 4-year-old girl with bilateral impaction of inverted primary maxillary central incisors which trauma had displaced their tooth germ before erupting.