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One of the promises of “meaningful use” of Electronic Health Records (EHRs) is to facilitate digital information exchange between healthcare providers through continuity of care documents. Despite such promise, outside medical records (OMRs) of referral patients including clinical notes, lab test results or diagnostic test reports are frequently provided through fax or print out. Moreover, it is not...
A constant voltage output independent of loads is desirable in magnetically resonant wireless power transfer (WPT) systems. Most of the magnetically resonant WPT systems developed so far do not have such a property. In this paper, we introduce compensation networks to the WPT systems and develop the conditions and parameters that allow the magnetically resonant coupling WPT systems to be of load independent.
Meshless methods have proposed recently to solve electromagnetic problems for some advantages. This paper extends the meshless radial point interpolation method (RPIM) to the application of electromagnetics with the plasma media. The discretized equations for a plasma driven by an electric field is derived with the shape function expansion. Consequently, this paper shows a numerical experiment solved...
This paper presents the use and formulation of generalizing node-based meshless method for a computational platform allows unification and hybridization of different numerical methods. It is based on the node-based meshless method with the applications of the method of weighted residuals (MWR). Numerical example shows the effectiveness and validity of the platform.
This paper presents a new transmitting array system of magnetically-coupled resonance for uniform spatial wireless power transfer coverage. Unlike a conventional array system in which each resonant coil element has its own respective resonant tuning capacitor, the proposed array system consists of four identical resonant coil elements with only one common tuning capacitor. Four resonant coils are...
Time reversal (TR) techniques have been introduced for many applications in acoustics, seismology, medical imaging, electromagnetics, and so on. One of the applications is source locating in a time-invariant environment. By performing the TR process, temporal and spatial focusing occurs at the original source location and consequently the source locations are identified. In this paper, we propose...
This paper presents a new transmitting array of magnetically-coupled resonance system for multi-receiver wireless power transfer systems. It consists of several resonant coils driven by a single source loop. Our analysis shows that it can deliver power wirelessly to multiple receivers evenly and automatically without any control circuits with a relatively high power transfer efficiency. The proposed...
Retrodirective arrays are unique phased array systems that are capable of providing power gain in the direction of a received source with no prior knowledge of the source's location. When compared to fully adaptive arrays that adjust their beam patterns to the signal environment based on the received spatial signature, retrodirective arrays have small computational burdens for antenna pattern adaptation...
The finite-difference time-domain (FDTD) method is a popular time-domain numerical method for solving RF/microwave structure problems. It can compute the wideband electrical parameters such as S-parameters. In simulating a waveguide structure, effective absorbing boundary conditions are needed to terminate the waveguide while simulate the infinite long waveguide that create no reflections of modes...
Antenna diversity has long been one method of increasing gains and enhancing performance in wireless systems. Such diversity provides a means to overcome the effects of signal multipath and fading in realistic RF channels or propagation environments. The design proposed here uses hybrid combining of two types of antenna diversity, spatial and polarization, to provide a consistently better received...
A novel method of developing an electromagnetic absorber is proposed through the design of an ultrawideband resistor-loaded planar dipole absorber. With the method, an antenna array structure is first designed for its best transmission performance and configured as an absorber with the application of the reciprocal principle. The designed planar dipole antenna has achieved a fractional bandwidth of...
In this paper, a multichannel energy detection (MED) receiver based on nonlinear square law (SL) technology is proposed for ultra-wideband (UWB) system. By using a group of band-pass filters, the received signal processed by SL device is separated into multiple channels, and then the channel with serious narrow band interference (NBI) will be omitted to improve the NBI mitigation ability of the receiver...
Due to increasing demands for a large number of users and a large amount of data transmission, a 4G LTE communication system will require its antenna to have omnidirectional radiation patterns and wide frequency bandwidth. To this end, in this paper, a novel omnidirectional horizontally polarized (HP) antenna is presented for the 4G communication systems. The antenna consists of four pairs of flag-shaped...
Electromagnetics forms the foundation of modern electrical and electronic systems that see the technologies we enjoy and take for granted today. It has been used to transfer information and power in daily lives. In the wireless domain, however, it had not been considered and employed much for power transfer until 2008 when a MIT research team lead by Prof. Marin Soljacic successfully demonstrated...
Subgriding is much desirable for FDTD modeling of small structures in large structures. However, it has remained to be very challenging for its instability. In this paper, we propose a simple subgridding scheme that takes advantage of the explicit unconditionally stable finite-difference time-domain (FDTD) method free of unstable modes: it is applied to the coarse mesh regions with larger space steps...
The late-time instability has been an issue of main concern for time-domain integral equation (TDIE) method using the march-on-time algorithms. It can be identified with by analyzing the eigenvalues of the synthetic impedance matrix of the methods. In this paper, we reformulate the TDIE methods and analyze the late-time instability of different types of TDIE. A new category of the eigenvalues is presented...
It is well known that Joule heat losses in integrated circuits (ICs) may change electrical behaviors of devices, especially semiconductor components. In this paper, a meshless approach based on a radial point interpolation method (RPIM) is developed to numerically model the coupled electrical-thermal process in time domain. The effectiveness of the proposed RPIM is verified through simulation of thin-film...
Considered as an alternative to ERP and a pre-condition to the future Enterprise 4.0 based on IoT and Cyber physical system principle, this paper tentatively presents a proposal to develop an Enterprise Operating System (EOS). At first a set of requirements and functionalities are identified. Then a survey on existing relevant works is presented and mapped to the requirements. The architecture of...
Black phosphorous is a layered semiconductor material which shows interesting electronic and optical properties. Few layer black phosphorous named as phosphorene is the new two-dimensional semiconductor material demonstrated in 2014. In this paper, we use tight-binding method to implement a matrix representation for single layer and multilayer phosphorene nanoribbon structures. By this approach, the...
This paper aims at presenting the basic concepts and approaches on enterprise interoperability measurements. Methods to evaluate enterprise performances will be at first presented and reviewed. Then the paper focuses on the interoperability measurement. Three basic enterprise interoperability measures are discussed, namely, interoperability potential, interoperability incompatibility, and interoperability...
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