Quasi-block Toeplitz matrix in matlab

In this paper we try to approximate any properties of quasi-block Toeplitz matrix (QBT), by means of a finite number of parameters. A quasi-block Toeplitz (QBT) matrix is a semi-infinite block matrix of the kind F = T(F) + E where T(F) = (Fj−k)j,k∈Z, that Fk are m × m matrices such that Ʃi∈Z|Fi| has bounded entries, and E = (ei,j )i,j∈Z+ is a compact correction. Also, we should say the norms ‖ F ‖w= Ʃi∈Z ‖ Fi ‖ and ‖ E ‖2 are finite. QBT-matrices are done with any given precision. The norm ‖ F ‖QBT = α ‖ F ‖w + ‖ E ‖2, is for α = (1 + √5)/2. These matrices are a Banach algebra with the standard arithmetic operations. We try to analysis some structures and computational properties for arithmetic operations of QBT matrices with some MATLAB commands.Publisher's Versio

Urban Heat Mitigation for Current and Future Conditions: A case study for downtown London ON

The urban heat island is a phenomenon wherein urban areas experience warmer temperatures than their surrounding rural areas. Techniques to reduce excess heat in urban environments are known as heat mitigation or heat island mitigation solutions, with the intent that they reduce urban temperatures. This research presents an investigation on the impacts and effectiveness of urban heat mitigation techniques on improving the outdoor thermal conditions of downtown London, Ontario. The impact of increasing vegetated areas and applying higher albedo materials for road pavements is assessed with ENVI-Met software for current and future summer weather. Furthermore, investigations were conducted for current and future winter weather scenarios to explore the effects of these heat mitigation techniques on other seasons\u27 outdoor conditions. Finally, the effects of heat mitigation strategies on building energy consumption were simulated by HAP Carrier software. Results show that increasing vegetation and trees reduce the air temperature and mean radiant temperature during both day and night periods. A higher air temperature reduction is detected for the greenery model with a higher percentage of trees relative to grasslands. The average air temperature at 17h is reduced up to 0.56°C and 0.66°C for respectively, for increasing trees and high albedo materials scenarios. Furthermore, results showed an increase in the mean radiant temperature value for the scenario with increasing albedo of the road materials. The results further demonstrated a reduction in the cooling load of buildings with increasing trees in the building neighborhoods

Assessment the prevalence of high-risk human papillomavirus types 16 and 18 in 15 to 45 years old women

Background: Cervical cancer is the fourth most common cancer in incidence and the first genital cancer in women around the world, which 95% of them are related to human papillomavirus (HPV) infections. The risk of cervical cancer increases 10-12 time in women with HPV infection. This study aim to evaluate the prevalence of high-risk HPV infections among 15-45 years old women.Materials and Methods: This cross sectional study was carried out on 92 normal women who admitted at Semnan hygiene center and has 15-45 years old. Cervical samples were collected using Cytobrush cell collector and consequently DNA extraction was performed using commercial DNA extraction kit. Polymerase Chain Reaction (PCR) was done using HPV (GP5, GP6) universal primers accompanied by positive and negative control in each PCR run. In order to extracted DNA template quality control, actin gene used as housekeeping gene.Results: In this investigation, study subjects age range found to be 15-45 with mean of 30±0.9 years old. HPV infection was not found in patient group. Thus, further approach in order to HPV16 and HPV18 types detection, was not performed. However, other studies represented low to moderate prevalence for HPV in some regions of Iran.Conclusion: Cervical cancer is one the major health concern and the fourth most common cancer around the world. This cancer is more common in developing countries than developed countries due to lack of screening program. Regard to possible high prevalence rate of HPV virus and its association with cervical cancer, we suggest further determination of the HPV prevalence as well as planning in large-scale vaccination in high risk group

Informal physics with the Middle Eastern and North African region and public

Physics, as a human venture, seeks to engage people all across the world. Engagement encompasses a variety of activities through which to interact with the public, including students and early-career physicists. In the Middle Eastern and North African (MENA) region, the landscape of the type of activities is relatively under-explored, and the exploration of these activities vis-à-vis different groups remains an area of interest within the literature. The public engagement activities that we present in this talk cover the authors’ experiences in three key activities: talks, mentorship, and social media engagement, all of which aim to address a MENA audience. The purpose of these activities is to spark interest in physics, gauge existing interest, engage in discussions about the impact of physics research locally and globally, and provide information about physics careers. Engagement comes in various forms — for instance, talks at Egyptian universities consisted of informal teaching events which engaged diverse audiences, including early-career physicists and the general public. Our online engagement has centered around mentorship of physics students and early-career physicists. Through the informality of social media, we have been able to engage with MENA students, both within the MENA region and within the diaspora in the context of research and early-stage career advice. The increasing influence of social media over the past decade has given rise to this new modality for engagement, which includes two types: public mentorship by raising awareness about physics and its applications and professional mentorship to provide information to early career physicists. In the context of the broader literature, informal physics programs play a critical role in recruitment of under-represented populations into physics and their sense of belonging to the physics community (Rethman et al., 2021). Our work highlights the impact of these engagement activities with a novel audience that has not been represented in the physics education literature. Understanding how different members of the public respond to public engagement will be important for developing future strategies and programs dedicated to improving STEM engagement efforts in the MENA region. Our goal is to advocate for public engagement in the MENA world and to encourage more research in informal physics in the Arab region. We plan to present examples and discuss our experiences in talks, mentorship, and social media engagement with a MENA audience. REFERENCE Rethman, C., Perry, J., Donaldson, J. P., Choi, D., & Erukhimova, T. (2021). Impact of informal physics programs on university student development: Creating a physicist. Physical Review Physics Education Research, 17(2), 020110

Existence of a solution for a nonlinear integral equation by nonlinear contractions involving simulation function in partially ordered metric space

In a recent paper, Khojasteh et al. presented a new collection of simulation functions, said Z-contraction. This form of contraction generalizes the Banach contraction and makes different types of nonlinear contractions. In this article, we discuss a pair of nonlinear operators that applies to a nonlinear contraction including a simulation function in a partially ordered metric space. For this pair of operators with and without continuity, we derive some results about the coincidence and unique common fixed point. In the following, many known and dependent consequences in fixed point theory in a partially ordered metric space are deduced. As well, we furnish two interesting examples to explain our main consequences, so that one of them does not apply to the principle of Banach contraction. Finally, we use our consequences to create a solution for a particular type of nonlinear integral equation

Measuring the performance of accepted investment companies in Tehran’s stock exchange by value efficiency analysis

Measuring the relative performance of firms plays an important role for investment decisions. This research presents a systematic method to evaluate the performance of accepted investment companies listed on Tehran Stock Exchange. The analysis is based on a set of criteria that are determined by experts and the values of criteria’s are extracted from the actual data reported to stock exchange. The efficiency measurement carried out by value efficiency analysis, which is an extension of data Envelopment Analysis. Finally, according to the model’s results, the efficient investment companies are introduced and they are ranked based on the defined criteria. The preliminary results indicate that both methods are capable of providing appropriate rankings for different financial firms

Role of Retinol Binding Protein -4(RBP-4) and some Biochemical Parameters in Type II Diabetes Mellitus Patients

Diabetes is an important public health issue that adversely affects the lives of millions of individuals worldwide. RBP4 involvement in the pathogenesis of insulin resistance and type 2 diabetes. The aim of this study to assessment of role retinol binding protein -4 and other biochemical parameters in T2DM. Eighty eight participated in this study. Forty four T2DM, age between (40-60) years and forty four healthy control age between (40-55). there was a highly significant increase of FBS, HbA1C, TC, TG, LDL-C and VLDL-C, while a significant decreased of HDL-C between control and T2DM patients. There was a highly significant increase of RBP-4 level between different group (control and T2DM patients). Conclusion: Elevation of retinol in diabetic patients is considered a risk indicator for them with the early onset of cardiovascular disease, and this is a result of the continuous increase in the concentrations of sugar levels in the blood, and thus a defect in the metabolism of fats occurs, which leads to its rise, and this is an indicator of the entry of a diabetic patient with one of the complications, which is heart disease

Effects of Quinazolinones on the Development of BALB/c Mice

Objective(s)Quinazolinones are heterocyclic components (able to form cyclized compounds) which have several medical effects such as anti-malarial, spasmolytic, anti-microbial, sedative, etc. They are also known for their fungicidal properties, inhibition of tyrosine-kinase and DNA repair enzyme poly (ADP-ribose) polymerase (PARP) and are also effective in treatment of cancer, diabetes, and parkinsonism complications.Materials and MethodsIn this study, for the first time different aspects of developmental effects of two new Quinazolinone components (QPPE and QEPE), on kidneys of BALB/c mice embryos were investigated. Pregnant BALB/c mice were divided into four groups of control (n=30), sham (n=30), experimental 1 (n=30) and experimental 2 (n=30). Control mice remained intact, sham and two experimental groups received 0.05% methyl cellulose and 100 mg/kg/body weight (most effective dose) of QPPE and QEPE, intraperitoneally (IP), on day 10th of gestation. Kidneys were removed by c-sections, stained with H&E, PAS, trichrome, reticholin and jones staining. Some embryonic kidneys were prepared for measurements of level of alkaline phosphatase and TEM studies.ResultsLight and TEM microscopes, and level of enzyme surveys demonstrated that QPPE and QEPE are toxic components, creating protrusions at the surface of convoluted proximal tubules, protein casts, renal necrotic cells, pseudothyroidezation, mitochondria degeneration, hyperemia, glomeruli hypertrophy, widening of renal spaces, vacuolization, as well as decrease in the number of brush border villi and level of alkaline phosphatase. ConclusionBy being teratogens and toxins, these two new derivatives affected development of embryonic kidneys at histological, biochemical and intracellular levels; QEPE had more effects and convoluted proximal tubules were more sensitive than convoluted distal tubules

The effect of L-carnitine on Oocyte Mitochondrial Activity after Cryopreservation

Background: Mitochondria are cellular organelles required for energy production, vital to reproduction, especially oocyte maturation and fertilization. It has been seen that oocyte cryopreservation (OC) can cause mitochondria damage, aggregation of lipid droplets near mitochondria and endoplasmic reticulum, and cryoinjury. In recent studies use of antioxidants such as L- carnitine can increase the number of active mitochondria and decrease intracellular ROS levels. The present study aimed to determine the beneficial effect of L –carnitine on oocyte mitochondrial activity after vitrification. Materials and Methods: In the present experimental study, 6-8 weeks of female NMRI mice were taken from the Royan Institute of Iran and stimulated with 7.5 IU Pregnant Mare Serum Gonadotrophin (PMSG) and 10 IU of human chorionic gonadotropin (HCG) after 48 hours was injected. After stimulation, oocytes were collected, and MII oocytes were selected. A two-step vitrification procedure was done, and 0.6mg/ml of L –carnitine was added to both ES and VS mediums. After two weeks, oocyte thawing was performed, intracellular GSH level was also measured mitochondrial membrane potential was measured. Captured images were analyzed by J software (Version 1.40; and obtained data were analyzed using SPSS Ver.20. Results: Average difference in intracytoplasmic GSH level in the study group was significantly higher than the control group (P<0.001). So, L –carnitine could successfully increase the oocyte intracytoplasmic GSH level. Also, it has been seen that the LC supplement could successfully grow oocyte mitochondrial function and subsequent mitochondrial membrane potentials(P<0.001). Conclusion: Adding LC to the cryopreservation media could increase mitochondrial activity, GSH level, and mitochondrial membrane potentials. Adding LC to the cryopreservation could enjoy the beneficial effect of L –carnitine on oocyte mitochondrial activity after vitrification and minimize mitochondrial damage and boost oocyte quality which can lead to successful fertilization and embryo growth

Acute lower Limb Ischemia Caused by Fungal Infective Atrial Thrombus: A Case Report

Introduction: Septic thromboemboli have two consequences, ischemic and infection. In this paper we discuss a case with acute lower limb ischemia caused by fungal infective atrial thrombus. The patient underwent an anticoagulant therapy. Case presentation:                 A 43-year-old female patient who suffered from valvular heart disease (history of mitral and tricuspid valve replacement) was referred to the vascular surgery department of Modarres hospital with acute left limb ischemia. She underwent a successful emergency surgical thrombectomy. The pathological report of thrombus demonstrated fungal infection.  Conclusion: After surgical thrombectomy to control the acute lower limb ischemia, antimicrobial treatment of septic emboli is necessary