Laminar flow control (LFC) is one of the key enabling technologies for quiet and efficient supersonic aircraft. Recent work at Arizona State University has led to the development of a novel concept for passive LFC on crossflow dominated flow configurations. It employs distributed leading-edge roughness to limit the growth of naturally dominant instabilities that would otherwise lead to an earli...

a new multi-stage fuzzy (msf) controller based on multi-objective harmony search algorithm (mohsa) is proposed in this paper to solve the load frequency control (lfc) problem of power systems in deregulated environment. lfc problem are caused by load perturbations, which continuously disturb the normal operation of power system. the objectives of lfc are to mini small size the transient deviati...

BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is considered as the hepatic manifestation of insulin resistance (IR) syndrome. The effect of insulin sensitizers on liver function tests and metabolic indices in NAFLD patients is a matter of debate. OBJECTIVES The aim of study was to compare the effects of two different insulin sensitizers, pioglitazone, and metformin, on liver function t...

Gamma ray spectroscopy systems have dead time losses during data collection due to pulse processing in the electronics. Several methods have been developed in the past to recover from dead time losses. These include live-time clocks and loss-free counting. The live-time clock (LTC) extension technique (where the counting time is extended to compensate for the lost counts) gives accurate results...

OBJECTIVES The objective of this study was to evaluate the outcomes of the Ponseti manipulation and casting method for clubfoot in a tertiary hospital in Zimbabwe and explore predictors of these outcomes. METHODS A cohort study included children with idiopathic clubfoot managed from 2011 to 2013 at Parirenyatwa Hospital. Demographic data, clinical features and treatment outcomes were extracte...

PURPOSE Iodinated contrast media (CM) and iron in the liver are known to hinder an accurate quantification of liver fat content (LFC) with single-energy computed tomography (SECT). The purpose of this study was to evaluate the feasibility and accuracy of dual-energy CT (DECT) for ex vivo quantification of LFC, in the presence of iron and CM, compared with SECT. MATERIALS AND METHODS Sixteen p...

Load Frequency control (LFC) in power system is undergoing a lot of changes due to the rapidly growing demand and due to various renewable generation integration to the existing system. This work proposes an LFC scheme based on Fuzzy Logic Control for a hybrid wind-diesel power system. Therefore the objective of this LFC is to minimize system frequency deviations and tie line power changes. The...

The article discusses the technology of casting according to smelted models, in particular, processes manufacturing wax models. We considered methods elements model blocks with use molds and help additive technologies. In this paper we showed features application technologies lost-wax casting. A simulation has been developed evaluate effectiveness using printing produce Based on results modelin...

Due to the complexity and diversity of large-scale power systems in practice, designing load-frequency control (LFC) strategies against load variations faces big challenges to ensure the stability and economy of the network. The focus of this paper is to design a novel adaptive PI-type fuzzy logic (FL)-based LFC architecture for solving the LFC problem in such an interconnected electric power g...

This paper is focused on the preparation procedures, using a talc-based filler, to improve rheologic properties of lost foam refractory coatings. Talc, with grain size 40 ?m, was mechanically activated in vibration mill over following times: 10, 20 and 30 min. Depending time required for mechanical activation, change filler shape analysed along their effects talc-filled coating dispersion abili...