Results 111 to 120 of about 358,286 (141)

Mixed RF and Hybrid RF/FSO Relaying

2015 IEEE Globecom Workshops (GC Wkshps), 2015
Abstract-In this paper, we consider a mixed RF and hybrid RF/FSO system where several mobile users transmit their data over an RF link to a relay node (e.g. a small cell base station) and the relay forwards the information to a destination (e.g. a macro cell base station) over a hybrid RF/FSO backhaul link. The relay and the destination employ multiple
Jamali, V., Michalopoulos, D. S., Uysal, Murat, Schober, R.   +3 more
openaire   +1 more source

Optimizing RF Output for Cooled RF Ablation

Journal of Cardiovascular Electrophysiology, 2004
Cooled RF ablation catheters increase lesion size and facilitate ablation compared to standard RF ablation catheters. Cooling the ablation electrode increases the disparity between tissue temperature and electrode temperature, making use of temperature for guiding power application during ablation of less certain value.
William G, Stevenson, Joshua, Cooper, John, Sapp   +2 more
openaire   +2 more sources

RFS

ACM SIGOPS Operating Systems Review, 2011
Due to the increasing number of applications (and their data) being placed on mobile devices, access to dependable storage is becoming a key issue in mobile system design -- and cloud storage is becoming an attractive solution. However, this introduces a number of new issues related to unpredictable wireless network connectivity and data privacy over ...
Yuan Dong, Haiyang Zhu, Jinzhan Peng, Fang Wang, Michael P. Mesnier, Dawei Wang, Sun C. Chan   +6 more
openaire   +1 more source

Session 3 overview / RF: RF techniques

2011 IEEE International Solid-State Circuits Conference, 2011
Summary form only given. Wireless circuits have become the foundation of the way we live our lives, and this trend will only continue further in the future. Even in this mature field, new techniques are developed every year, and these inventions will allow the further integration of new technologies into every consumer product that will in no time ...
Jan Craninckx, Jing-Hong Conan Zhan
openaire   +1 more source

RF/Microwave processing in RF systems

2016 Progress in Electromagnetic Research Symposium (PIERS), 2016
Recent wireless communication systems have been developed with various and complicated additional functions. Whereas conventional RF/Microwave systems have done the original functions of frequency up/down conversions, spectral power selection/limitation, and noise control, they are required for more agile operations such as antenna beam steering ...
Sang-Min Han, Seok-Jae Lee, Won-Sang Yoon   +2 more
openaire   +1 more source

Monitoring RF ablation

European Radiology Supplements, 2004
The addition of contrast-enhanced ultrasound to monitor the extent of interstitial ablation has simplified this procedure. Newer agents such as SonoVue used with microbubble-specific software (CPS) allow continuous real-time scanning at low MIs so that, if residual perfused tumour is found, complete evaluation of the extent of tissue ablation can be ...
Luigi, Solbiati, Massimo, Tonolini, Luca, Cova   +2 more
openaire   +2 more sources

Recursive RF excitation

Magnetic Resonance in Medicine, 1992
AbstractWe have investigated the properties of a recursive process in which the output signal from a given RF excitation pulse may be used as the input (excitation) pulse of a subsequent iteration. This recursive excitation technique increases contrast and improves feature segmentation for the purpose of motion tracking.
P S, Christy, R C, Grimm, J F, Greenleaf, R L, Ehman   +3 more
openaire   +2 more sources

RF-Mehndi: A Fingertip Profiled RF Identifier

IEEE INFOCOM 2019 - IEEE Conference on Computer Communications, 2019
This paper presents RF-Mehndi, a passive commercial RFID tag array formed identifier. The key RF-Mehndi novelty is that when the user’s fingertip touching on the tag array surface during the communication, the backscattered signals by the tag array become user-dependent and unique.
Cui Zhao, Zhenjiang Li, Ting Liu, Han Ding, Jinsong Han, Wei Xi, Ruowei Gui   +6 more
openaire   +1 more source

RF-MEMS Application to RF Tuneable Circuits

Advances in Science and Technology, 2016
The bursting wireless communication market, including 5G, advanced satellite communication systems and COTM (Communication On The Move) terminals, require ever more sophisticated functions, from multi-band and multi-function operations to electronically steerable and reconfigurable antennas, pushing technological developments towards the use of tunable
Roberto Sorrentino, Paola Farinelli, Alessandro Cazzorla, Luca Pelliccia   +3 more
openaire   +1 more source

RF bandpass tunable filter using RF MEMS

2008 International Conference on Computer and Communication Engineering, 2008
A bandpass tunable RF filter is proposed by using Radio Frequency (RF) Microelectro Mechanical Systems (MEMS). The tenability is obtained by using capacitive MEMS switches. The performance of the filter depends on geometry and location and types of the MEMS switches. The paper described the optimization procedure to design a bandpass filter that can be
A.H.M. Zahirul Alam, Md. Rafiqul Islam, Sheroz Khan, Soheli Farhana, null Nik Noor, Noraini Aziz   +5 more
openaire   +1 more source