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The availability and reasonable cost of broadband Internet made it an attractive and favourable option to billions of users worldwide. Being a fast service also encourages its users to use real-time applications which is streaming and live data transfer includes VoIP and video streaming. The performance of such applications in Wireless Local Area Network (WLAN) may be highly affected by security protocols...
This paper focuses on improving and build a discrete event simulation model for modeling outpatient pharmacy workflow queuing system with the intent of exploring options for designing an efficient the queuing system of KKUH outpatient pharmacy Riyadh KSA. Simulation models of existing workflows in the pharmacy for KKUH outpatient pharmacy were created using discrete event simulation software (Arena)...
This research relates to a single machine scheduling problem with objective is to minimize earliness & Tardiness penalties with common due dates. We proposed a heuristic method for finding initial solution as an input to the Tabu search algorithm for finding a near optimal solution for this problem. In our research study the due dates are restrictive with due date parameter h, ranges from 0.2,...
Voltage and frequency regulations are main requirements for autonomous operation of an isolated microgrid with electronically interfaced distributed energy resource (DER) units. This paper presents a robust decentralized control design scheme for a multi-DER microgrid to enhance its voltage and frequency regulations. The proposed control scheme utilizes linear quadratic (LQ) decentralized control...
High frequency radio links tend to suffer losses due to hydrometeors. Rain is among the largest contributor to these types of losses and is known to cause most outages on microwave links. Rainfall rate is one of the crucial parameters for radio engineers to calculate and predict attenuation on radio links due to rain. This paper studies the potential of rainfall rate acquired from EUMETSAT's Multi-Sensor...
In recent years, because of two way convenience of driving by both Internal Combustion Engine (ICE) and onboard batteries, Plug-in Hybrid Vehicle (PHEV) has earned familiarity, precedence and acknowledgement in the personal transportation sector. However, impact of PHEV charging on the power system stability is a hindrance to large adoption of PHEVs. Hence, there is a need of finding a suitable location...
The trend of current brain computer interfaces (BCI) seek to establish bi-directional communication with the brain, for instance, recovering motor functions by externally controlling devices and directly stimulating the brain. This will greatly assist paralyzed individuals through bypassing the damaged brain region. The key process of this communication interface is to decode movements from neural...
As the amount of non-scheduled small scale distributed generation (DG) units are increasing, lack of fault ride through (FRT) capability of these generators may have an adverse affect on the overall power system. This study focuses on the basics of transient overvoltage issue arising under faulty condition with integration of power-electronic (PE) interface based DG units in a system. Reasons behind...
A major thrust in brain machine interface (BMI) is to establish a robust, bi-directional direct link between the central nervous system (CNS) and artificial devices (e.g. medical implants, artificial organs, neural stimulators, robotic hands, etc.) for cybernetic interface and treatment of a range of neurodegenerative conditions. Significant effort has centered on support of motor control through...
Wide-scale penetration of small distributed generation (DG) units to weak distribution systems is one of the major concerns for power system engineers. As grid standards limit reactive power generation capability of small DG units, lack of sufficient reactive power support, brings the problem of slow voltage recovery under post-fault conditions. In this paper, a STATic COMpensator (STATCOM), which...
The penetration level of renewable based distributed generation (DG) has increased rapidly in recent years. Grid standards demand small DG units to operate with constant power factor control mode and large DG units with voltage control mode. As a result, small DG units are exposed to the problem of slow voltage recovery due to contingencies like fault. This paper proposes a new sensitivity index based...
Decoding of movement related neural activity is a key process required for brain computer interfaces or bio-feedback. The subthalamic nucleus (STN) is involved in the preparation, execution and imagining of movements. This study therefore aimed to decode subthalamic local field potentials (LFPs) related to movements and its laterality, left or right sided visually cued movements. STN LFPs frequency...
Renewable energy based generations are connected at subtransmission and distribution levels and are normally dispersed throughout the network. This causes a number of benefits and challenges for power system operators. This paper outlines voltage and small signal stability issues for a distribution network and provides a number of case studies.
Distributed joint source-channel coding technique is finding its application in the ever evolving world of telecommunication, especially in the sensor network paradigm. The unique characteristics of the sensor networks are giving birth to new signal processing techniques and shifting the processing burden from the transmitter to the receiver side. The nodes of sensor networks, when deployed over particular...
In this paper we have presented a novel idea to optimize the performance of Low Density Parity Check (LDPC) Codes by using selective encoding and decoding approach. We have also proposed a new simplified form of parity check matrix, h named as beacon matrix which is useful for the efficient implementation of the proposed scheme. The proposed scheme is more suitable for real time applications like...
This paper reports the influence of annealing treatment on the performance of organic solar cells. The structure of ITO/PEDOT:PSS/P3HT:PCBM/LiF/Al bulk heterojunction solar cells were fabricated and annealed with three different temperature of 50°C, 100°C and 150°C respectively. IV characteristic of the device found that the annealing treatment might optimize the solar cell performance. For optimum...
Recently, establishing reliable index to assess voltage stability condition of a stressed multi-node power transmission and distribution system is getting lot of attention. With the integration of renewable energy in power system the subject of voltage stability in distribution system is getting more interest. In this study, reactive power margin has been used as a stability index which appears as...
A wavelet-based electrocardiogram (ECG) compression algorithm is proposed in this paper. The proposed algorithm reduces the bit rate of ECG and preserves its main clinically diagnostic features intact by minimizing reconstructed signal distortion. The original signal is divided into blocks and each block goes through a discrete wavelet transform. A threshold based on energy packing efficiency of the...
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