Surface-acoustic-wave (SAW) transversal filters consist of piezoelectric single-crystal quartz plates (dies) with interdigital thin film transducers. The performance of these devices is critically dependent on the spacing and geometry of the interdigitation. Any manufacturing process errors that affect the geometry of the transducers and/or the surface acoustic wave speed will affect the device...

Wurtzite structured ZnS nanoribbons have been synthesized by a catalyst-free solid–vapor deposition technique. The nanoribbon has a saw-teeth shape, and the nanosaw is formed by a two-step process: a fast growth along a-axis forms the body of the saw; a subsequent growth along c-axis creates the teeth. The one-sided teeth structure is suggested to be the self-catalyzed growth of the Znterminate...

Most of data in a multi attribute decision making (MADM) problem are unstable and changeable, and thus sensitivity analysis can effectively contribute to making proper decisions. Here, we offer a new method for sensitivity analysis of multi-attribute decision making problems so that by changing one element of decision making matrix, we can determine changes in the results of a decision making p...

Abstract: The Central Bureau of Statistics is a government agency that serves the public in providing accurate statistical data. Every year accepts new partners. Partners who do data processing has been done on field. In this case, acceptance partner candidates quite often held to carry out survey and population census activities. process less effective because it still uses manual method, name...

PURPOSE To develop a device for sectioning prostatectomy specimens that would facilitate comparison between histology and in vivo MRI. MATERIALS AND METHODS A multi-bladed cutting device was developed, which consists of an adjustable box capable of accommodating a prostatectomy specimen up to 85 mm in size in the lateral direction, a "plunger" tool to press on the excised gland from the top t...

An active self-interference (SI) cancellation technique for SAW-less receiver linearity improvement is proposed. The active canceler combines programmable gain and phase in a single stage and is co-designed with a highly-linear LNA, achieving low noise and low power. A cross-modulation mechanism of the SI canceler is identified and strongly suppressed thanks to the introduction of an internal r...

In this paper, the structure of SAW has been studied. In previous work in SAW, materials such as lithium niobium, lithium tantalite and gallium nitride were used in the structure of SAW, and thus had a low operating frequency and the highest reported operating frequency was about 4 GHz. In this paper, aluminum nitride and gallium nitride in the SAW structure are used in combination. The electro...

Guth and Katz’s seminal work on the number of distinct distances [4] was based on several novel ideas. One can regard their proof of as consisting of four main tools: (i) A reduction from the distinct distances problem to a problem about line intersections in R. This part is usually referred to as the Elekes-Sharir framework. We will refer to it as the Elekes-Sharir-Guth-Katz framework, for rea...

In this paper, an active filtering technique is presented which is capable of filtering the out-of-band blockers in wireless receivers. The concept is based on the feedforward cancellation technique where a blocker replica is subtracted at the output of the low-noise amplifier (LNA). In contrast to the previously reported feedforward cancellation methods, exact gain and phase matching are easil...