a. fatehi

In this paper, for the first time, the combination of these two concepts is used for the earthquake acceleration wave. For this purpose, eight earthquakes from four different locations in the world have been selected. Initially, each earthquake is filtered up to 5 stages using a discrete wavelet transform. Due to the close approximation of the frequency content of the wave to the original earthquake, the approximate wave is used for subsequent calculations. In the next stage, the spectrum of Fourier and the diagram of five of the frequency of dominant of the earthquake are plotted. Also, using the continuous wavelet transform, the time-frequency curves of the main earthquakes and the time-frequency curves of the wave obtained from the discrete wavelet transform are investigated. The goal is to find the best stage of a discrete wavelet filter based on frequency content to reduce computations to over 80%. In the next step, the study examines the time of the strong ground motion, the structure response of single degree of freedom, and the dynamical response of the timing of the structure of a degree of freedom. By examining the above parameters, the best-performing wavelet transformation step is inferred.

Improving and optimizing corrosion protection methods, including cathodic protection, has received much attention in recent years. Due to the advancement of science and technology and industry development, manufacturing and controlling rectifiers has also made significant progress. The performance characteristics and efficiency of rectifier components have improved over the years. Based on the studies, an industrial pulse rectifier that can produce pulsed current in the frequency range of 800 Hz to 60 kHz based on the desired frequency and duty cycle was successfully designed and manufactured. In order to evaluate the protection performance of this system in the field, the pulse rectifier was placed next to the conventional rectifier, and the protection conditions of the system were continuously monitored. Three test points with specified intervals were analyzed at frequency and duty cycle of 50 kHz and 73% (A), 60 kHz and 73% (B), 60 kHz and 50% (C), and 50 kHz and 50% (D), respectively. Results showed that AC voltage in the pulse system has decreased by more than 80% compared to the conventional system. In addition, the current consumption values showed that in the pulse system, the current consumption has decreased by more than 70% in certain values of frequency and duty cycle. Because the pulse wave has practically no current consumption during off time, energy consumption is greatly reduced, an important factor in energy consumption and economic costs. Also, this system has no cooling system like the conventional rectifiers. Accordingly, the system has a better performance at certain values of frequency and duty cycle. Such systems in areas with high electrolyte resistance can be considered a good option. Also, if the pipeline has a cover, the system can function properly even with the cover separation areas. Moreover, the protection potential became more uniform and remained within the protection range during the measurement period, despite the poor performance of the anode bed.

This paper proposes a fuzzy-GPC based on a mathematical model of human immunodeficiency virus (HIV) to determine the drug dosage and control the progression of the illness. For this purpose, a Takagi-Sugeno (TS) fuzzy model is generated to identify the nonlinear behavior of HIV. The parameters of HIV are estimated by the least square error (LSE) estimation method. Moreover, three scenarios are proposed to control HIV. In scenario 1, according to TS fuzzy model, generalized Predictive Control (GPC) is designed for a daily base drug therapy. Scenario 2 and 3 are more practical. In scenario 2, since the biological behavior of patients are different, the variation in the patients biology is taken into account by generating data according to a group of patients with varying parameters in their mathematical model. In senario3, since daily diagnosis of patient’s health is costly, it is assumed that a patient information is available every month, and drug dosage is determined each month. As a result of which, the sample time of the measurement increases to 30 make it a multi-rate system. The result shows that the TS fuzzy models  the mathematical model of HIV very well, and in all scenarios, the proposed controller has a good performance and the number of healthy cells are controlled in acceptable amount.

 This study was conducted to determine the factors related to infant formula milk consumption in Rafsanjan in 2016.

 This study was a descriptive study conducted on 372 mothers referred to Rafsanjan health centers with children under one-year-old consuming formula milk. Frequency and percentage were used to describe qualitative data, while mean and standard deviation were used for quantitative variables.

 The mean age of mothers was 23.61 ± 4.87 years. The mean age of the formula onset was 40.71 ± 39.46 days. 208 mothers (55.9%) had the highest frequency as the initiator of formula milk consumption. The most common causes related to this issue were maternal perceptions of insufficient milk with 206 individuals (55.4%) and poor infant weight gain with 107 individuals (28.8%), respectively.

 The results showed that mothers have a key role in formula milk consumption. Educational programs that strengthen mothers' beliefs may be needed to continue breastfeeding.

Transcatheter closure of small to moderate patent ductus arteriosus (PDA) has been well established during this last decade. The Amplatzer device occluder (ADO) is a self expandable device with ease of delivery and a rapid learning curve. The aim of the study was to access the optimum sizing of ADO in regard to maximum efficacy with respect to shunt occlusion without oversizing and reducing bulk and potential protrusions.

From April 2007 to July 2008, a total of twenty-four adult PDA closures were reviewed.Occlusion was achieved via antegrade venous approach. Our primary objective was an evaluation of optimum ADO sizing for PDA closures. We retrospectively compared the patients with a theoretical optimum size as regards complications and residual shunts.

PDA size determination was based on the smallest diameter at pulmonary artery (PA) side.Based on specific criteria, undersizing was not observed in our cases, while oversizing was noted in 42% of cases. Oversizing did not lead to a decrease in residual shunts (37.5% vs. 36%, p=NS). Although no short-term complications were observed in the oversized group, oversizing resulted in a characteristic mushroom deformity due to unnecessary tension applied to our device. The Chinese device also performed well in terms of deployment and short-term complications with no significant difference in comparison to its American counterpart (p=NS).

An acceptable rate of acute complications was obtained; nonetheless, we were frequently oversizing, leading to mild device deformation and protrusion. Although not previously described in the literature, the terminal ballooning of the ADO should alert us of such a complication.