In this paper, a compact tri-band bandpass filter (BPF) using multi-stub-loaded resonator with controllable frequencies is presented. The multi-stub-loaded resonator consists of a main transmission line, two open stubs and a short stub. Characterized by using evenand odd-mode analysis, it is found that the resonator consists three modes, and the modes can be controlled individually, which enabl...

A compact microstrip lowpass filter using radial stub resonators is developed. This filter is composed of two radial stub resonators that are asymmetrically connected to each other by a stepped impedance structure. This structure results in a very high rejection and wide stopband. The proposed filter with a 3 dB cutoff frequency of 2.07 GHz has been designed, fabricated and measured. Measuremen...

A printed rectangular slot antenna excited by a 50 Ω Co-Planar Waveguide with a triangular shaped tuning stub is proposed for UWB applications. The triangular shaped tuning stub is used to remove the high and low frequency limitations of UWB operation, improving the impedance matching. A prototype has been designed and fabricated and both the impedance bandwidth and radiation characteristics ar...

A real-time ion cyclotron range of frequencies (ICRF) antenna matching system has been successfully implemented on Alcator C-Mod. This system is a triple-stub tuning system working at 80 MHz, where one stub acts as a pre-matching stub and the other two stubs use fast ferrite tuners (FFT) to accomplish fast tuning. It utilizes a digital controller for feedback control (200 μs per iteration) usin...

We have proposed a novel type of bandpass plasmonic filter consisting of metal-insulator-metal bus waveguides coupled with a series of side-coupled cavities and stub waveguides. The theoretical modeling demonstrates that our waveguide-resonator system performs a plasmonic analogue of electromagnetically induced transparency (EIT) in atomic systems, as is confirmed by numerical experiments. The ...

Because of the increasing complexity of the applications running in Kitten, a lightweight HPC OS targeted for compute nodes of massively-parallel, distributed-memory supercomputers, and the complex hardware that Kitten is running on, bugs are becoming more difficult to find. As a result, the need for Kitten to support user-level application debugging becomes more critical. Unfortunately, Kitten...

This document describes a backward-compatible technique that may be used by OSPF (Open Shortest Path First) implementations to advertise a router's unavailability to forward transit traffic or to lower the preference level for the paths through such a router. (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Int...

Fast flux networks represent a special type of botnets that are used to provide highly available web services to a backend server, which usually hosts malicious content. Detection of fast flux networks continues to be a challenging issue because of the similar behavior between these networks and other legitimate infrastructures, such as CDNs and server farms. This paper proposes Fast Flux Watch...

This paper proposes a new Feature Interaction (FI) ltering method at the requirements level. FI ltering is to screen out some irrelevant feature combinations before the FI detection process, by using simple indications that certain combinations are likely to cause FI. To achieve this, we extensively utilize a requirement notation method, called Use Case Maps (UCMs), which helps designers to vis...

Presentation conversion is a key operation in any development environment for distributed applications, such as Corba, Java-RMI, DCE or ASN.1-based environments. It is also well-known performance bottleneck in high-speed network communication. Presentation conversion code is usually generated by an automatic code generation tool referred to as stub compiler. The quality of the code generated by...