Designing power system stabilizer for multimachine power system using neuro-fuzzy algorithm

This paper describes a design procedure for a fuzzy logic based power system stabilizer (FLPSS) and adaptive neuro-fuzzy inference system (ANFIS) and investigates their robustness for a multi-machine power system. Speed deviation of a machine and its derivative are chosen as the input signals to the FLPSS. A four-machine and a two-area power system is used as the case study. Computer simulations for the test system subjected to transient disturbances i.e. a three phase fault, were carried out and the results showed that the proposed controller is able to prove its effectiveness and improve the system damping when compared to a conventional lead-lag based power system stabilizer controller

Ontology reasoning using SPARQL query: A case study of e-learning usage

The involvement of learning pedagogy towards implementation of e-learning contribute to the additional values, and it is assign as a benchmark when the investigation and evaluation will carry out. The results obtained later believed would be fit to the domain problem.The results might provide instructional theories including recommendation after reasoning that can be used to improve the quality of teaching and learning in the virtual classroom. Ontology as formal conceptualization has been chosen as research methodology. Ontology conceptualization helps to illustrate the e-learning usage including activities and actions, likewise learning pedagogy in the form of concepts, class, relationships and instances. The ontology constructed in this paper is used in conjunction with the SPARQL rules, which are designed to test the reasoning ability of ontology. Reasoning results should be able to describe the knowledge contained in ontology, as well the facts on it. The SPARQL rules contains triplets to verify if the students are actively engaged in a meaningful way towards e-learning usage. The backward engine is optimized to store the facts obtained from queries. Development of ontology knowledge based and reasoning rules with SPARQL queries allow to contribute a sustainable competitive advantages regarding the e-learning utilization. Eventually, this research produced a learning ontology with reasoning capability to get meaningful information

Mechanical Properties Of Zeolite Filled Ethylene Vinyl Acetate Composites Crosslinked By Peroxide.

The effects of filler content and chemical crosslinking on mechanical properties of ethylene vinyl acetate (EVA) filled with zeolite particles in various volume fractions (5-25 vol. %) were investigated

Implementation Analysis Of Service Quality In Business Package Delivery Services (Case PT. Indah Logistic Cabang Pekanbaru)

At this time the service is needed in services once by the community. For the provision of services in the field of services need to be improved so that the community as a customer service users were satisfied with the service provided. PT. Indah Logistic cabang Pekanbaru is engaged in the business of shipping services or goods.The research was conducted at PT. Indah Logistic cabang Pekanbaru. The problem formulation is How Quality Service at PT Indah Logistic cabang Pekanbaru? This study aims to determine the Quality of Service at PT. Indah Logistic cabang Pekanbaru and to determine the barriers faced by PT. Indah Logistic cabang Pekanbaru in Service Quality. In line with this research, the quality of service with a number of the respondents were 97 customers. This study uses quantitative analysis method using the theory put forward by some members about the quality of services. In this study researchers using indicators namely Utilization, Reliability, Responsiveness, Assurance, and Emphaty as a measure of the Quality of Service at PT. Indah Logistic cabang Pekanbaru. Technique used data collection with interviews and kuisioner ie, sampling techniques for Accidental Sampling. Shared data source that is divided into two primary data source is the source of information obtained through kuisioner, interviews with informants and secondary data obtained through the documents available in PT. Indah Logistic cabang Pekanbaru. From the research results obtained can be seen that the Quality of Service of PT. Indah Logistic cabang Pekanbaru categorized good arm.Keywords : Quality of Service, Tangible, Reliability, Responsiveness,Assurances and Emphat

Association of the Glu298→Asp polymorphism in the endothelial nitric oxide synthase gene with risk of coronary artery disease

Genetic variants of endothelial nitric oxide synthase (eNOS) could influence individual susceptibility to coronary artery disease (CAD) with or without associated demographic factors. The aim of this study was to assess whether Glu298/Asp polymorphism of the eNOS gene is associated with the occurrence and severity of angiographycially defined coronary artery disease. Polymerase chain reaction/restriction fragment length polymorphism (PCR-RFLP) analyses were carried out to detect the Glu298/Asp variant of the eNOS gene in 279 patients with CAD as compared to controls (250). The prevalence of the Asp298 variant of eNOS was not found to be significantly and independently associated with the risk of CAD (OR = 1.08, 95% CI = 0.77 to 1.51, P = 0.663), extent of CAD on angiography (OR = 1.18, 95% CI = 0.63 to 2.23, P = 0.605) and in-hospital mortality (OR = 1.08, 95% CI = 0.29 to 4.04, P = 0.908). This investigation examined whether the Glu298/Asp polymorphism of the eNOS could represent a useful genetic marker to identify individuals prone to the development of atherosclerotic diseases. More studies are needed to confirm whether the Glu298/Asp polymorphism of the eNOS gene could represent a useful genetic marker to identify individuals of the study population prone to the development of atherosclerotic disease.Key words: eNOS gene, polymorphisms, coronary artery disease (CAD), risk factors, genetic markers

Carbonate Hydroxyapatite and Silicon-Substituted Carbonate Hydroxyapatite: Synthesis, Mechanical Properties, and Solubility Evaluations

The present study investigates the chemical composition, solubility, and physical and mechanical properties of carbonate hydroxyapatite (CO3Ap) and silicon-substituted carbonate hydroxyapatite (Si-CO3Ap) which have been prepared by a simple precipitation method. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence (XRF) spectroscopy, and inductively coupled plasma (ICP) techniques were used to characterize the formation of CO3Ap and Si-CO3Ap. The results revealed that the silicate (SiO4 4−) and carbonate (CO3 2−) ions competed to occupy the phosphate (PO4 3−) site and also entered simultaneously into the hydroxyapatite structure.TheSi-substitutedCO3Ap reduced the powder crystallinity and promoted ion release which resulted in a better solubility compared to that of Si-free CO3Ap. The mean particle size of Si-CO3Ap was much finer than that of CO3Ap. At 750∘C heat-treatment temperature, the diametral tensile strengths (DTS) of Si-CO3Ap and CO3Ap were about 10.8 ± 0.3 and 11.8 ± 0.4 MPa, respectively

Reflection Impacts Preservice Teachers\u27 Instruction and Planning

Creating a habit of reflective practice promotes ongoing and sustainable instructional improvement for preservice teachers. Furthermore, reflection enables teachers to strengthen their instruction through critical analysis of student learning and engagement. While reflection may be intuitive for an in-service teacher, preservice teachers need this experience to develop intentional and automatic reflective practice. Adopted from the field of medicine, Subjective, Observation, Assessment, Planning (SOAP) Notes is a reflective strategy that allows educators to critically reflect on the lessons they have taught. SOAP Notes promote critical reflection on planning and student learning and may impact classroom management and instructional decision-making