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The use of multi-criteria decision analysis (MCDA) by online broker to rank different service providers in the Cloud is based upon criteria provided by a customer. However, such ranking is prone to bias if the customer has insufficient domain knowledge. He/she may exclude relevant or include irrelevant criterion termed as 'misspecification of criterion'. This causes structural uncertainty within the...
Eldercare monitoring using non-wearable sensors is a candidate solution for improving care and reducing costs. Abnormal sensor patterns produced by certain resident behaviors could be linked to early signs of illness. We propose an unsupervised method for detecting abnormal behavior patterns based on a new context preserving representation of daily activities. A preliminary analysis of the method...
Breaches in online contracts (Service Level Agreements, SLAs) are usually compensated by gift vouchers at present, however as the online contracts emerge towards smart contracts, the breaches could potentially lead to court injunctions over blockchains. This research proposes Probability based Factor Model (PFM) that can be implemented over the blockchain to automatically identify breaches that can...
In this paper, compact size band pass filters are proposed and designed for WLAN applications. The coupled DGS resonators are considered the main block of proposed band pass filters. The three proposed filters are designed by using the same defected ground structure shape, but with different feed line configurations. The feed line configuration affects the presence of transmission zeros in the rejection...
3D ultrasound (US) acquisition acquires volumetric images, thus alleviating a classical US imaging bottleneck that requires a highly-trained sonographer to operate the US probe. However, this opportunity has not been explored in practice, since 3D US machines are only suitable for hospital usage in terms of cost, size and power requirements. In this work we propose the first fully-digital, single-chip...
This paper introduces a 401–457 MHz BFSK transmitter (TX) architecture that utilizes mixing and image rejection techniques to generate the two carrier frequencies for BFSK transmission. The proposed architecture enables low power consumption for a wide range of data rates by avoiding fast settling time requirements for the frequency-locked loop. Simulations indicate that the TX designed in 130nm CMOS...
The sector of water pumping is one of the greatest consumers of electricity. Integrating microgrids and renewable energy sources facilitates stainable energy future. This paper proposes an optimal operation of energy management system in a microgrid with water pumping. The microgrid includes PV, wind turbine, and energy storage system (ESS). The proposed method determines the optimal hour-by-hour...
This paper introduces the design of low pass filter for radar applications. The main block of the proposed filter is the combination of defected microstrip structure (DMS), compensated microstrip capacitors, and two defected ground structures (DGS). The proposed filter has several desirable features such as low insertion loss of 0.3 dB within the pass band, a wide rejection band from 1.5 GHz to 8...
This paper presents the design of a metamaterial MIMO antenna which operates at 5.8 GHz. The left handed single cell of series capacitor and shunt inductor are considered the main block of the antenna elements. The configuration of the shunt stub is reversed to achieve lower coupling between the antenna elements The small size of only 2.93cm×2.6cm and high isolation of more than 35 dB are considered...
This paper presents the design and measurement of a two-element MIMO antenna for UWB applications. Feeding for the MIMO antenna is employed using Asymmetric Coplanar Strip (ACS). The two elements are printed side-by-side on FR4 substrate, without having to use a decoupling structure between the two antennas. The edge-to-edge separation distance is 0.23λ0 at 3 GHz. The proposed antenna operates in...
UWB MIMO with four elements antenna is introduced in this paper. The asymmetric coplanar strip (ACS) is used to feed the MIMO antenna. The single antenna element consists of quarter elliptical ring radiator. The proposed antenna has size of (6 × 5) cm2. The distance between the edge to edge points of the antenna elements equals 0.37 λ0 between antenna 1 and 2 and 0.14 between antenna 1 and 3 at 3...
In this paper, a maximum power point tracking (MPPT) architecture for micro-scale photovoltaic (PV) energy harvesting systems is presented. A switching DC-DC boost converter is used to provide the required voltage for the circuits of the ultra-low-power application. The MPPT tracks different illumination intensities through changing the input impedance of the boost converter. The proposed technique...
Analysis of human tissue endogenous fluorescence is becoming a new modality of medical imaging. Its capacities represent the missing link between macroscopic radiological tools such as MRI and CT-scan and the surgeon view during surgical procedures. However, numerous aspects of this signal are not well known. Time dependence is one of these aspects. The aim of this work is to investigate the autofluorescence...
Electronic skin can be integrated into a prosthetic device to endow the prosthesis with artificial cutaneous sensing, thereby partially restoring the sensory information lost due to an amputation. Non-invasive cutaneous electrostimulation transmits the tactile information sensed by the electronic skin on the prosthetic hand to the human brain, through the amputee's afferent nervous system. In this...
A second-order Gm-C low-pass filter with a novel large-signal linearization method for operational transconductance amplifiers having low supply voltages is presented. The design technique uses a combination of unbalanced resistively degenerated differential pairs and adaptive biasing to extend the linear range. The presented unity-gain biquad filter cell is intended to be used as a building block...
3D ultrasound, an emerging medical imaging technique that is presently only used in hospitals, has the potential to enable breakthrough telemedicine applications, provided that its cost and power dissipation can be minimized. In this paper, we present an FPGA architecture suitable for a portable medical 3D ultrasound device. We show an optimized design for the digital part of the imager, including...
This paper presents a 12-Gb/s power-efficient voltage-mode driver for multi-standard serial-link applications. The proposed driver combines the advantages of voltage-mode drivers and those of variable-output-swing ones into a single architecture for multi-standard operation. This is achieved by having a reconfigurable pull-up network and a fixed shared pull-down network. In addition, this technique...
The present paper aims to design shunt active power filter (APF) for harmonic cancelation of grid-connected wind turbine (WT). The wind energy conversion system (WECS) consists of permanent magnet synchronous generator (PMSG) driven by a variable-speed WT. The output of the PMSG is connected to a direct three phase AC/AC matrix converter (MC) to interface the system with the distribution grid. The...
This paper presents a design of converter controllers and filters of Line Commutated Converter High voltage direct current (LCC-HVDC) power transmission system to increase loadability and reliability of long power transmission. Also the proposed tuned PI controllers for HVDC Converters are verified in sense of HVDC transmission system performance and reliability. The studied system performances are...
This paper introduces an application of active power filter (APF) in photovoltaic (PV) renewable energy system for power quality (PQ) improvement. The PV energy system is connected to Saudi Arabia National Grid (110/13.8/0.4 KV) via inverter circuit, transmission line and step-up transformer. The harmonics due to the inverter circuit and non-linear local load are mitigated and reduced using shunt...
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