For the generation of picosecond (< 100 ps) electron beam pulses, we studied the RF modulation of a conventional triode electron gun. The feasibility study for this scheme has been experimentally investigated by modulating a triode gun of the Y-824 cathode-grid (KG) structure provided by the CPI Eimac, with 2.856-GHz pulsed RF’s generated by a solid-state amplifier (SSA). In this paper, we pres...

When the theory of constraints (TOC) supply chain replenishment system (TOC-SCRS) is deployed in a plant or a central warehouse, replenishment frequency (RF) becomes one of the important decision parameters and depends on the sales or replenishment quantity (RQ) in the plant. The higher RF is preferred by TOC for the low inventory and the fast response to different market requirements. However,...

background chronic sacroiliac (si) joint pain constitutes 16% to 30% of the total prevalence of chronic low back pain, which is commonly unilateral. apart from conservative management, various interventional pain management procedures have been reported. intraarticular deposteroid injection has been described as the most evidence-based, but different various radio frequency (rf) procedures have...

A certificate of authenticity (COA) is an inexpensive physical object that has a random and unique multidimensional structure S which is hard to near-exactly replicate. An inexpensive device should be able to scan object’s physical “fingerprint,” i.e., obtain a set of features in the form of a multidimensional signal x that pseudo-uniquely represents S. For a given “fingerprint” x and without a...

The issue of radio frequency interference in Digital Subscriber Line (DSL) networks is of particular concern in urban areas with many strong radio sources nearby. This paper investigates in detail the mechanisms underlying the capacity reduction due to the presence of radio frequency signals from Amplitude Modulated (AM) broadcast stations in an ADSL network. An ADSL system, channel, and radio ...

We describe a new mode of operation of the single electron transistor (SET). The so-called RF-SET (radio frequency-SET) is a dual of the RF-SQUID (radio frequency-superconducting quantum interference device). It has been operated at frequencies above 100 MHz with a very high charge sensitivity (1.2 3 10e/ÏHz). The large bandwidth, combined with a high sensitivity, will enable studies of the dyn...

Radio Frequency (RF) spectrum is a natural resource widely used by wireless network operators to provide radio communications or transmission systems (e.g. telephone operators and TV broadcast stations). Scarcity of RF spectrums has led to the enhancement of new techniques for better utilization of the RF spectrums. The questions asked are how much RF spectrum is available and can be used oppor...

In this paper, a low voltage ultra-wideband RF receiver for Software-Defined Radio (SDR) is presented. In SDR design, the radio frequency (RF) receiver should be able to receive signals over a broadbandwidth so that it can satisfy a variety of different communication standards. In the proposed design, working frequency ranging from 0.1GHz to 6GHz RF front-end for SDR, covering almost all of mat...

In this work, a Radio Frequency (RF) Energy Harvester comprised of a differential Radio Frequency-to-Direct Current (RF-DC) converter realized in ST130 nm Complementary Metal-Oxide-Semiconductor (CMOS) technology and a customized broadband Printed Circuit Board (PCB) antenna with inductive coupling feeding is presented. Experimental results show that the system can work with different carrier f...

This paper presents a comprehensive radio ontology. The ontology describes the communication/networking scenario, the RF devices, their components and protocols that they support, the policies, and the tasks to be performed. The developed ontology enables wireless Software-Defined Networks (SDN) composed of abstract heterogeneous Radio Frequency (RF) devices.