Design of GCSC Stabilizing Controller for Damping Low Frequency Oscillations

This paper presents a systematic procedure for modeling and simulation of a power system equipped with FACTS type Gate Controlled Series Compensator (GCSC) based stabilizer controller. Single Machine Infinite Bus (SMIB) power system was investigated for evaluation of GCSC stabilizing controller for enhancing the overall dynamic system performance. PSO algorithm is employed to compute the optimal parameters of damping controller. Eigenvalues of system under various operating condition and nonlinear time domain simulation is employed to verify the effectiveness and robustness of GCSC stabilizing controller in damping low frequency oscillations (LFO) modes

Evaluation Of Soil Conditioner (Barbary-Plant (BP) Fertilizer) On Cucumber Hybrids (Cucumis Sativus L.) Under Cooled Plastic Houses Conditions In Khartoum State

This experiment was conducted for two successive seasons (June to September 2016 and January to mid April 2017) in cooled plastic house at Shambat Research Station, Agricultural Research Corporation, Sudan. The objective of this study is to investigate the effect of Barbary - plant (BP) fertilizer; third generation (G3) on growth and yield of two cucumber hybrids. The experiment was laid out in a split plot design with four fertilizer treatments namely; 50g Barbary-Plant (BP) fertilizer, 75 g (BP), 100 g (BP) and (NPK) fertilizer as a check in rate 1.0 - 12.5g / plant during season, used as a sub plot, and two hybrids (A and B) as main plot replicated three times. The means were compared using Duncan Multiple Range Test (DMRT) at P < = 0.05. Seventy five g of (BP) per plant resulted in a significant increase in plant height, number of flowers and fruits per plant, total fruit yield (kg/m2), number of fruits/m2, fruit height and fruit diameter followed by 50 g (BP), NPK and 100g (BP). Moreover, using of 75 g (BP) resulted in a significant saving of water irrigation followed by 50 g (BP) and 100 g (BP). Likewise, using of (B-P) reflecting in controlling of pests and diseases and extended the harvesting period of the crop. Based on the statistical and economical analysis, the study recommended the application of the soil conditioner Barbary-plant (BP) at the rate of 75g per plant of cucumber (60kg (BP) / 300m2) in Sudan

NUMERICAL PREDICTION OF SOLITARY WAVE FORMATION OF A PLANING HULL IN SHALLOW WATER CHANNELS

This paper uses a CFD (Computational Fluid Dynamics) analysis to investigate the shallow water effects on prismatic planing hull. The turbulence flow around the hull was described by Reynolds Navier Stokes equations RANSE using the k-ɛ turbulence model. The free surface was modelled by the volume of fluid (VOF) method. The analysis was steady for all the range of speeds except those close to the critical speed range due to the propagation of the planing hull solitary waves at this range. In this study, the planing hull lift force, total resistance, and wave pattern for the range of subcritical speeds, critical speeds, and supercritical speeds have been calculated using CFD. The numerical results have been compared with experimental results. The pressure distribution on the planing hull and its wave pattern at critical speed in shallow water were compared with those in deep water

Evidence-Based Medicine; Climbing a Mountain for a Better Decision-Making

Evidence-Based Medicine is a relatively new term used in medical sittings and Health Information Technology (HIT). It is a form of medicine that integrates practitioners’ expertise with the best available practical evidences to improve better patient care. Evidence-Based Medicine has increasingly been used and incorporated into daily medical practices to overcome the shortcomings in the conventional standard care. The purpose of this literature review is to highlight the importance of Evidence-Based Medicine and how it can act as a crucial tool in decision-making to empower the quality of medical services for better patient outcomes

Duchenne Muscular Dystrophy (DMD) Diagnosis: Past and Present Perspectives

Duchenne muscular dystrophy (DMD) is a fatal X-linked disorder, characterized by progressive skeletal muscle wasting. The disease is caused by various types of mutations in the dystrophin gene (DMD). The disease occurs at a frequency of about 1 in 5000 male births, making it the most common severe neuro-muscular disease. In addition to clinical examinations of muscle strength and function, diagnosis of DMD usually involves a combination of immunological assays using muscle biopsies, typically immunohistochemistry and western blotting, and molecular techniques such as DMD gene sequencing or Multiplex Ligation Dependent Probe Amplification (MLPA) using blood samples. In fact, precise molecular diagnosis is a prerequisite for determining the appropriate personalized therapeutic approach such as exon-skipping, gene therapy or stem cell-based therapies in conjunction with gene editing techniques like CRISPR-Cas9. However, the quest for reliable biomarkers with high sensitivity and specificity for DMD from liquid biopsy is still a hotspot of research, as such non-invasive biomarker(s) would not only facilitate disease diagnosis but would also help in carrier detection, which will eventually result in better disease management. In this chapter, we will illustrate the detailed current and prospect strategies for disease

An Overview and Tutorials on Modeling and Simulation

The modeling and simulation are the most important challenges to the researcher to present the system reality and study the different metrics of it. This article provides the short overview to assist the new researchers toward their goals. With aid of differ scenarios related to an engineering domain the designers have an ability to answer critical questions about modeling and simulation

An agent based architecture for cognitive spectrum management

In the recent years, wireless technologies and devices have progressed dramatically that has augmented the demand for electromagnetic spectrum. Some research work showed that spectrum access and provision to user is not possible due to shortage of spectrum but federal communication commission refused to accept this theory and indicated that the spectrum is available since most of the frequency bands are underutilized. In order to allow the use of these frequency bands without interference, cognitive radio was proposed that characterizes the growing intelligence of radio systems can adapt to the radio environment, allowing opportunistic usage and sharing with the existing uses of spectrum. To take this concept a step further, we propose to use intelligent agent for spectrum management in the context of cognitive radio in this paper. In our proposed architecture, agents are embedded in the radio devices that coordinate their operations to benefit from network and avoid interference with the primary user. Agents carry a set of modules to gather information about the terminal status and the radio environment and act accordingly to the constraints of the user application

A gorilla adenovirus-based vaccine against Zika virus induces durable immunity and confers protection in pregnancy

The teratogenic potential of Zika virus (ZIKV) has made the development of an effective vaccine a global health priority. Here, we generate two gorilla adenovirus-based ZIKV vaccines that encode for pre-membrane (prM) and envelope (E) proteins (GAd-Zvp) or prM and the ectodomain of E protein (GAd-Eecto). Both vaccines induce humoral and cell-mediated immune responses and prevent lethality after ZIKV challenge in mice. Protection is antibody dependent, CD

Video streaming over Ad hoc on-demand distance vector routing protocol

Video streaming is content sent in compressed form over the netwoks and viwed the users progressively. The transmission of video with the end goal that it can be prepared as consistent and nonstop stream. The point is that to give client support to client at anyplace and at whatever time. Mobile Ad hoc Networks (MANETs) are considered an attractive nertwork for information transmission in many applications where the customer programme can begin showing the information before the whole record has been transmitted. Ad hoc On-demand Distance Vector (AODV) protocol is considered as one of the most important routing protocols in MANET. However, routing protocols assume a crucial part in transmission of information over the network. This paper investigates the performance of AODV Routing Protocol under video traffic over PHY IEEE 802.11g. The protocol model was developed in OPNET. Different outcomes from simulation based models are analyzed and appropriate reasons are also discussed. A different scenarios of video streaming were used. The metric in terms of throughput, end to end delay, packet delivery ratio and routing overhead were measured. A comparision with GRP and GRP are also reported

The dilemma of malaria diagnosis: How accurate are the diagnostic tools?

Background: Malaria represents a major health problem for the public as well as clinicians and diagnosticians, because many diseases have similar symptoms to the symptoms of malaria. This study aimed to determine the accuracy of malaria diagnosis both clinically and using various laboratory tests compared to the gold standard microscopy.Materials and Methods: This is a descriptive, cross-sectional hospital-based study, conducted at the casualty of Atbara Hospital, in January 2011. Any patient clinically suspected to have malaria in this month was included. Demographic and clinical data was collected using a standardized pre-tested questionnaire. Each patient was diagnosed primarily by the clinician, mainly medical officers and houseofficers, investigated by a thick blood film stained by Giemsa stain in the hospital laboratory. We, thereafter, obtained blood samples from the same patient, made thick and thin films stained by Giemsa and Field stains in addition to rapid tests for malaria antigens and antibodies. For quality assurance, tests were reviewed by expert technicians in the State Reference Laboratory for Malaria. Giemsa thick blood film was taken as the gold standard. Results of the various diagnostic methods were compared.Results: Two hundred patients volunteered to participate in this study. Females were 121(60.5%). The age range was from 7 months to 70 years, mean 25.85(+20.5). Only 5(2.5%) cases were confirmed positive for malaria. When compared to the gold standard test, giemsa thin film and Field stain showed 100% sensitivity and 100% specificity. The sensitivity and specificity of the blood film done by hospital laboratory was 80% and 99.5% respectively. While Rapid Antibody scored 60% and 89.7%, and for Rapid Antigen scored 80% and 96.9% for the sensitivity and specificity respectively. The clinical diagnosis was the least accurate method 80% sensitivity and 38.5% specificity.Conclusion: The prevalence of malaria among symptomatic patients in Atbara hospital is low. The ICT antigen and antibody tests, as well as clinicians over diagnose malaria when compared to the blood film. A combination of Rapid Diagnostic Test (RDT) with thick blood film for suspected malaria cases is recommended.Keywords: Malaria, Diagnosis, Blood film, Suda