Face recognition methods analysis

Face Recognition is one of the most important issues in Image processing tasks. It is important because it uses for various purposes in real world such as Criminal detection or for detecting fraud in passport and visa check in airports. Face book is a nice example of Face recognition application, when it sends notification to one user's friends who are recognized by their images that user uploaded in face book page. To solve Face Recognition problem different methods are introduced such as Principal Component Analysis (PCA), Independent Component Analysis (ICA), Support Vector Machine (SVM), Linear Discriminant Analysis (LDA), and Hidden Markov Models (HMM) which are explained and analyzed. Also algorithms like; Eigen face, Fisher face and Local Binary Pattern Histogram (LBPH) which are simplest and most accurate methods are implemented in this project for AT&T dataset to recognize the most similar face to other faces in this data set. To this end these algorithms are explained and advantages and disadvantages of each one are analyzed as well. Consequently, the best method is selected with comparison between the results of face reconstruction by Engine face, Fisher face and Local binary pattern histogram methods. In this project Eigen face method has best result. It should be noted that for implementing face recognition algorithms color map methods are used to distinguish the facial features more precisely. In this work Rainbow color map in Eigen Face algorithm and HSV color map in Fisher Face algorithm are utilized and results shows that HSV color map is more accurate than rainbow color map

Substructure Development and Deformation Twinning Stimulation through Regulating the Processing Path during Multi-Axial Forging of Twinning Induced Plasticity Steel

Multi‐axial forging (MAF) at room temperature is employed to investigate the effects of deformation processing path and the amount of imposed strain on the deformation mechanisms of a twinning‐induced plasticity (TWIP) steel. The results indicate that the twin frequency is decreased by applying the 2nd compression (∑ɛ = 0.8), however, an unexpected increase is realized at the end of first MAF pass (∑ɛ = 1.2). This is attributed to the change in strain path and orientation dependence of deformation twinning. The latter is phenomenal considering the previous researches reporting the suppression of twinning at the early stage of deformation (ɛ < 0.4). The same sequence is followed during the second pass of MAF process. Interestingly, the progressive and continues substructure development along with dynamic Hall–Petch effect results from deformation twinning leads to an appreciable grain refinement. The latter is accompanied by the sharp drop of hardening rate in corresponding flow curves. The microtexture analysis indicates the strengthened texture of the 1 pass‐processed specimens which is weaken at the end of 2 pass due to the recrystallization and increasing the number of texture component. The current work also explores the room temperature mechanical properties of the multi axial forged workpiece through elaborating the miniaturized tensile testing method

Comparative effects of the arachidonic acid enrichment of the concentrated food and live feed on growth rate and reproductive indices in zebrafish, Danio rerio

In this study, the comparative effects of arachidonic acid (ARA) enrichment of the concentrated food and live feed (Artemia nauplius) were investigated on growth rate and reproductive indices in zebrafish (Danio rerio). Thirty-day-old juveniles (n = 400, with an average initial weight of 0.125 g) were randomly distributed in six treatments (each in three replicates) in eighteen 10-L aquariums (with a stocking density of 15 juveniles per aquarium). Fish were fed with concentrated diet containing three levels of ARA (0, 1 and 2% in the diet) and live feed (Instar II Artemia nauplii) in three levels of ARA (0, enriched with 1% and 2% of ARA) for 60 days until sexual maturity. The results of Two-Way ANOVA showed that the final body weight, body weight gain rate (%), and female’s reproductive indices were not affected by the combined effects of two factors; food type and ARA levels (p>0.05). Body weight in fish fed with concentrated diet containing 2% ARA was significantly higher than compared with the other treatments (p<0.05). The highest absolute and relative fecundities, and gonadosomatic index were obtained in females fed ARA-free concentrated diet, the enriched- Artemia with 1-2% ARA, and the enriched- Artemia with 1% ARA (p<0.05), respectively. The ARA enrichment in the concentrated diet only accelerated the growth rate of fish until sexual maturity for breeding. However, fish fed the enriched- Artemia with 1% ARA exhibited higher gonadal weight and much higher relative fecundity compared to other groups despite lower final weight (p<0.05). Based on the results and in order to improve the female’s reproductive performance in zebrafish hatcheries, it is suggested that fish fed the enriched Artemia with 1% ARA two months before reproduction

Comparison of the Performance Indicators of the Emergency Department of Qom Shahid Beheshti Hospital before and after the Health Transformation Plan, (Iran)

Background and Objectives: Considering the initiation of the Health Transformation Plan in the Ministry of Health and Medical Education in 2014, evaluation of this plan is of particular importance. The aim of this study was to investigate the performance indicators of the Emergency Department of Shahid Beheshti Hospital in Qom city (before and after the transformation plan).   Methods: The study was carried out as a descriptive cross-sectional study in Shahid Beheshti Hospital of Qom city (year 2014). The statistical population consisted of the patients referring to the Emergency Department of the hospital, which was selected from the emergency and archived records and entered into the database. Four emergency department performance indicators, were selected and evaluated before and after the Health Development Plan. These indicators included the percentages of patients who were disposed under 6 hours, percentage of hospitalization of patients under 12 hours, unsuccessful cardiopulmonary resuscitation (CPR), and discharge with personal satisfaction. Data analysis was performed using the Chi square test.   Results: Before and after the Health Transformation Plan, the percentage of patients who were disposed under 6 hours, reached from 86% to 78.5%, hospitalization rate of patients under 12 hours reached from 96% to 83%, discharge with personal satisfaction from 19% to 14%, and the percentage of unsuccessful cardiopulmonary resuscitation from 83% to 55.3%. The mean of these four indicators, was statistically significant 4 years after the implementation of the transformation plan (p<0.0001).   Conclusion: According to the results of this study, emergency performance indicators improved with the implementation of the Health Transformation Plan. Therefore, this study should be carried out at a broader level for all hospital indicators

Rapid Homemade Reverse Transcriptase PCR Detection and Phylogenetic Analysis for SARS-CoV-2 Based on E and M Genes

Background & Objective: Coronavirus disease 2019 spreads worldwide and needs detection systems capable of rapid diagnostic of this virus (SARS-CoV-2). The aim of this study is to design the homemade RT-PCR method for the Detection and phylogenetic analysis of this virus Material & Methods: The genes selected for diagnosis were E and M genes for this virus. PCR product was cloned in pTZ57R/T plasmid for preparation of positive control. In order to determine the sensitivity of this molecular method, the genes mentioned in the clone pTZ57R/T vector and the Limit of detection (LOD) the genes were determined and phylogenetic analysis was performed using partial E and M gene sequences. Results: PCR product was observed for E and M genes 156 and 547 bp on the Agarose gel. The LOD of the E and M gene was 60 and 82 copies. There was also a positive response to the samples of patients who were positive by other methods. Conclusions: Since this virus is considered to be the cause of a pandemic in different countries all over the world, the present study is very important as a method of rapid and low-cost molecular diagnosis for monitoring this virus. Phylogenetic analysis is necessary for epidemiological studies for the control and prevention of the disease

Comparison between Management and Pharmacotherapy of COVID-19 in Iran and Switzerland: Management and Pharmacotherapy of COVID-19 in Iran and Switzerland

Background: On 30 January 2020, the WHO declared the outbreak of SARS-CoV-2 as a public healthemergency. In the present study, we compared the preventative and therapeutic strategies and the success rates of Iran and Switzerland during the COVID-19 outbreak.Materials and Methods: This study was conducted using electronic databases such as PubMed, Scopus, andWeb of Science. In addition, the official documents of developed countries and WHO from 1st February until 15th May 2020 were studied. Relevant documents were reviewed in detail, and vital data were extracted.Results: Both countries have restriction policies to reduce the infection rate in the prevention setting. Thesepolicies, such as the recommendation to all citizens to stay home unless necessary, army participation, andnon-face-to-face counseling, were surveyed by similar techniques in both countries. Some policies wereimplemented in both countries with different protocols. These policies, including social distancing practices,smart distancing methods, business activities, border closures, border controls, and restrictions, travelrestrictions, testing and screening for infection and fever, and decreased working hours, were performed inboth countries. In the treatment setting, the therapeutic strategy used in Iran consisted of hydroxychloroquineor chloroquine phosphate and anti-viral drugs. Switzerland followed the guidelines of the European countries.The infection rate, recovery rate, and death rate were 0.139%, 78.73%, and 5.91% in Iran, while these rateswere 0.352%, 88.81%, and 6.15% in Switzerland, respectively.Conclusion: Due to the lack of special treatment for the disease, prevention must be considered the mostimportant factor in policymaking. Importantly, observing social distance is the most effective method amongthe preventative strategies. The capacity of the health care systems to provide optimal services and facilities isan important factor for patients recovery