We introduce a new mechanism to pump liquid in microchannels based on the directional growth and displacement of gas bubbles in conjunction with the non-directional and selective removal of the bubbles. A majority of the existing bubble-driven micropumps employs boiling despite the unfavorable scaling of energy consumption for miniaturization because the vapor bubbles can be easily removed by c...

We present spectrophotometric observations of the Broad Line Radio Galaxy OQ 208 (≡ Mrk 668 ≡ 14040+286) obtained between 1985 and 1991. We show that the Balmer line fluxes and profile shapes undergo remarkable changes. The ratio of intensities between the broad and narrow components of Hβ increased monotonically from ∼ 15 in 1985 to ∼ 40 in 1991. The peak of the broad components of Hβ and Hα w...

[Purpose] The aim of the present study was to investigate the effects of a single session of transcranial direct current stimulation combined with virtual reality training on the balance of children with cerebral palsy. [Subjetcs and Methods] Children with cerebral palsy between four and 12 years of age were randomly allocated to two groups: an experimental group which performed a single sessio...

A new approach for the metrology on Coordinate Measuring Machine (CMM) is presented. It is based on the utilization of virtual gauges. The originality of the presented virtual gauge model is the notion of «fitter gauge» which develops the traditional possibilities of gauges. This model allows the verification of functional specifications of the geometrical tolerancing. An example of inspection ...

This research is an attempt to present a theoretical method for calculating the elastic movements of an adaptive system in order to optimize the design of the developed system and to describe the behavior of the system under the effect of variable cutting forces for the purpose of achieving the greatest possible accuracy and productivity of processing carried by this system. During the calculat...

An experimental evaluation of mixed mode fracture tests conducted on adhesively bonded wood specimens using a dual actuator load frame is presented. This unit allows the fracture mode mixity to be easily varied during testing of a given specimen, providing improved consistency, accuracy, and ease of testing over a range of loading modes. Double cantilever beam (DCB) type specimens made of south...

Background: The objective of the present study was to investigate the combinative effect of ball milling and solvent displacement method on size reduction of Celecoxib particles. Celecoxib is a poorly water soluble cyclooxygenase 2 inhibitor which has a wide range of therapeutic applicability. Methods: Microparticles were developed via solvent displacement method followed by planetary ball mill...

for the unknown column vector u(x , t) defined in some volume in space, V. Here, L is a linear partial differential operator in the spatial coordinate(s), x~, though the known continuous coefficients may be functions of t as well. For example, in a simple model for a single lifting rotor blade in forward flight, the dimensionless transverse displacement of the uniform blade satisfies the dimens...

We have studied the structural and electronic properties of pure, deffect and doped chalcopyrite semiconductors using Density functional theory (DFT) based first principle technique within Tight binding Linear Muffin Tin orbital (TB-LMTO) method. Our calculated structural parameters such as lattice constant, anion displacement parameter(u) in case of pure chalcopyrite and anion displacement par...