OBJECTIVE This study evaluates noncompressive sonography of appendicitis in children according to the potential positions of the appendix. SUBJECTS AND METHODS We evaluated 425 consecutive boys and girls clinically suspected of having appendicitis. Noncompressive sonography used a 5.0-MHz curved-array transducer to assess deep layers. We systematically investigated the possible positions of t...

A tunable computer controlled UV laser spectrometer utilizing intracavity second harmonic generation of a cw ring dye laser is described. The spectrometer yields broadband (~100-GHz) second harmonic outputs of up to 30 mW and narrowband (~100-MHz) single-mode UV outputs of up to 10 mW continuously tunable over intervals of 3200 GHz in the 285-311-nm wavelength range.

Background: This work evaluated the efficiency of common ultrasound stimulation (U.S.S) types on bacterial growth in vitro using clinically relevant conditions.Objective: To estimate different frequencies ultrasound bactericidal ability on bacteria in bacteria of Pseudomonas Aeruginosa. Methods: Six types of U.S.S (continuous wave, 7w/cm2, 20 KHz; continuous wave, 35w/0.8L, 40 KHz; continuous ...

For metal crack nondestructive detection, most conventional sensors are unable to realize the direction detection. In this work, a direction-sensitive microwave sensor is proposed for The consists of rectangular patch resonator and two perpendicular coupled feeding ports, which improves current distribution on surface sensitivity performances verified by simulation measurement experiments. resu...

The physical structure of the single junction thermal voltage converter (SJTVC) can be represented in simulation using an equivalent RLC circuit to investigate the performance and estimate the error sources. This paper describes instruments and techniques that apply 0.6 V thermal converters to achieve this aim. The technique was performed in the department of electrical metrology, National Inst...

Some 15% of solar flares having a soft X-ray flux above GOES class C5 are reported to lack coherent radio emission in the 100 – 4000 MHz range (type I – V and decimetric emissions). A detailed study of 29 such events reveals that 22 (76%) of them occurred at a radial distance of more than 800′′ from the disk center, indicating that radio waves from the limb may be completely absorbed in some fl...

Fast optimization of CMOS circuits is needed to reduce design cycle time and chip cost and to enhance yield. Mature electronic design automation (EDA) tools and well-defined abstraction-levels for digital circuits have largely automated the digital design process. However, analog circuit design and optimization is still not automated. Custom design of analog circuits and slow analog in SPICE ha...

Some 15% of solar flares having a soft X-ray flux above GOES class C5 are reported to lack coherent radio emission in the 100 – 4000 MHz range (type I – V and decimetric emissions). A detailed study of 29 such events reveals that 22 (76%) of them occurred at a radial distance of more than 800′′ from the disk center, indicating that radio waves from the limb may be completely absorbed in some fl...

A tri-band miniaturized Planar Inverted F Antenna (PIFA) design for bio-telemetry communications is investigated in this work. This smaller antenna effectively covers the three bands namely the Medical Implant Communications Service (MICS) band, the Industrial, Scientific, and Medical (ISM) band and a third band which is devoted to make the implanted device to work as and when required. The ope...

The design, fabrication, and evaluation of two dimensional array transducers for real-time volumetric imaging are described. The transducers we have previously described operated at frequencies below 3 MHz and were unwieldy to the operator because of the interconnect schemes used in connecting to the transducer handle. Several new transducers have been developed using new connection technology....