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  • Open Access

    ARTICLE

    Modeling of Heart Rate Variability Using Time-Frequency Representations

    Ghaylen Laouini1, Ibrahim Mahariq1, Thabet Abdeljawad2,3,4,*, Hasan Aksoy5

    CMC-Computers, Materials & Continua, Vol.69, No.1, pp. 1289-1299, 2021, DOI:10.32604/cmc.2021.018411

    Abstract The heart rate variability signal is highly correlated with the respiration even at high workload exercise. It is also known that this phenomenon still exists during increasing exercise. In the current study, we managed to model this correlation during increasing exercise using the time varying integral pulse frequency modulation (TVIPFM) model that relates the mechanical modulation (MM) to the respiration and the cardiac rhythm. This modulation of the autonomic nervous system (ANS) is able to simultaneously decrease sympathetic and increase parasympathetic activity. The TVIPFM model takes into consideration the effect of the increasing exercise test, where the effect of a… More >

  • Open Access

    ARTICLE

    Non-contact Real-time Monitoring of Driver’s Physiological Parameters under Ambient Light Condition

    Zhengzheng Li1, Jiancheng Zou2,*, Peizhou Yan1, Don Hong3

    Intelligent Automation & Soft Computing, Vol.28, No.3, pp. 811-822, 2021, DOI:10.32604/iasc.2021.016516

    Abstract Real-time and effective monitoring of a driver’s physiological parameters and psychological states can provide early warnings and help avoid traffic accidents. In this paper, we propose a non-contact real-time monitoring algorithm for physiological parameters of drivers under ambient light conditions. First, video sequences of the driver’s head are obtained by an ordinary USB camera and the AdaBoost algorithm is used to locate the driver’s facial region. Second, a face expression recognition algorithm based on an improved convolutional neural network (CNN) is proposed to recognize the driver’s facial expression. The forehead region is divided into three RGB channels as the region… More >

  • Open Access

    ARTICLE

    CO2 Assimilation Rate in Production Systems for Papaya Crops

    R. Ariza-Flores1, D. Trujillo-García2, M. A. Otero-Sánchez2, E. Canales Sosa2, C. H. Avendaño-Arrazate3,*, L. A. Gálvez-Marroquín4, P. Cadena Iñiguez5

    Phyton-International Journal of Experimental Botany, Vol.90, No.3, pp. 933-947, 2021, DOI:10.32604/phyton.2021.013227

    Abstract The aim of this study was to evaluate some physiological aspects of papaya crops in semi conventional and organic production systems. The following factors assessed in this experiment were: 1. Production systems (organic and semi conventional); 2. Genotypes (Maradol and Maradona F1), and 3. Cover crop plants (Canavalia, vegetative cover and no cover). Twelve treatments were obtained -product of factors’ combination- and distributed under a threerepetition experimental design of subdivided parcels. The factors examined in this study, that changed the CO2 assimilation rate, were production system and genotype. It was determined that the greatest gas exchange in papaya crops happened… More >

  • Open Access

    ARTICLE

    Loss of the ubiquitin-conjugating enzyme Rad6B disturbs mitochondrial function and cellular homeostasis in mouse skin

    LINGHUI YU#, RONG SHEN#, YANAN GUO, YANXUAN GUO, CHEN LI, YANFENG SONG*, DEGUI WANG*

    BIOCELL, Vol.45, No.3, pp. 761-772, 2021, DOI:10.32604/biocell.2021.014602

    Abstract Various factors can induce cell degeneration by altering the phenotype and metabolism of cells. Mitochondria play an essential role in cellular homeostasis and function, rendering aging processes highly associated with mitochondrial function and status. Herein, we describe an aging-prone phenotype of murine skin cells caused by depletion of Rad6B (Ube2b), an E2 ubiquitin-conjugating enzyme. In this study, using Masson’s trichrome, we showed that loss of Rad6B causes physiological structure changes in mouse skin with age. In addition, a combination of western blotting experiments, transmission electron microscopy and employment of immunofluorescence staining revealed that depletion of Rad6B was characterized by an… More >

  • Open Access

    ARTICLE

    Impact of Temperature on Upper Respiratory Tract Infections in Lanzhou Based on the Distributed Lag Model

    Guangyu Zhai1,2, Kuan Zhang2, Guorong Chai1,*

    Molecular & Cellular Biomechanics, Vol.18, No.1, pp. 21-31, 2021, DOI:10.32604/mcb.2021.014287

    Abstract The study mainly analyzed the relationship between temperature and the upper respiratory tract infections (URI) in Lanzhou. We collected the daily URI and meteorological data from 2010 to 2015. A distributed lag non-linear model was used to examine the relationship and potential effects of different temperatures and different lag days on the morbidity of URI. The results showed that the morbidity of URI was significantly related to the meteorological factors, and the peak of the onset of the disease usually occurred between November and February the next year. The correlation analysis was carried out between meteorological factors and URI cases,… More >

  • Open Access

    ARTICLE

    Coronavirus: A “Mild” Virus Turned Deadly Infection

    Rizwan Ali Naqvi1, Muhammad Faheem Mushtaq2, Natash Ali Mian3, Muhammad Adnan Khan4,*, Atta-ur-Rahman5, Muhammad Ali Yousaf6, Muhammad Umair6, Rizwan Majeed7

    CMC-Computers, Materials & Continua, Vol.67, No.2, pp. 2631-2646, 2021, DOI:10.32604/cmc.2021.012167

    Abstract Coronaviruses are a family of viruses that can be transmitted from one person to another. Earlier strains have only been mild viruses, but the current form, known as coronavirus disease 2019 (COVID-19), has become a deadly infection. The outbreak originated in Wuhan, China, and has since spread worldwide. The symptoms of COVID-19 include a dry cough, sore throat, fever, and nasal congestion. Antimicrobial drugs, pathogen–host interaction, and 2 weeks of isolation have been recommended for the treatment of the infection. Safe operating procedures, such as the use of face masks, hand sanitizer, handwashing with soap, and social distancing, are also… More >

  • Open Access

    ARTICLE

    Effect of Exercise-Based Cardiac Rehabilitation on Cardiorespiratory Fitness in Adults with Congenital Heart Disease

    Prisca Eser1,*, Thomas Gruber1, Thimo Marcin1, Claudia Boeni1,2, Kerstin Wustmann3, Christina DeLuigi1, Matthias Greutmann4, Daniel Tobler5, Markus Schwerzmann3, Matthias Wilhelm1

    Congenital Heart Disease, Vol.16, No.1, pp. 73-84, 2021, DOI:10.32604/CHD.2021.013051

    Abstract Background: The purpose of this study was to investigate whether patients with adult congenital heart disease (ACHD) benefit from exercise-based cardiac rehabilitation (CR) short- and long-term with regard to improvement of cardiorespiratory fitness. Methods: Cardiopulmonary exercise tests (CPET) completed by ACHD patients between January 2000 and October 2019 were analysed retrospectively. Linear mixed models were performed for peak oxygen consumption (VO2) with patients as random effect and age, sex, disease classification, preceding surgery (≤3 months) and preceding CR (≤4 weeks for short term and >4 weeks for long term) as fixed effects. Results: 1056 CPETs of 311 ACHD patients with… More >

  • Open Access

    ARTICLE

    Investigation of Coronavirus Deposition in Realistic Human Nasal Cavity and Impact of Social Distancing to Contain COVID-19: A Computational Fluid Dynamic Approach

    Mohammad Zuber1, John Valerian Corda1, Milad Ahmadi2, B. Satish Shenoy1, Irfan Anjum Badruddin3,*, Ali E. Anqi3, Kamarul Arifin Ahmad4, S. M. Abdul Khader5, Leslie Lewis6, Mohammad Anas Khan7, Sarfaraz Kamangar3

    CMES-Computer Modeling in Engineering & Sciences, Vol.125, No.3, pp. 1185-1199, 2020, DOI:10.32604/cmes.2020.015015

    Abstract The novel coronavirus responsible for COVID-19 has spread to several countries within a considerably short period. The virus gets deposited in the human nasal cavity and moves to the lungs that might be fatal. As per safety guidelines by the World Health Organization (WHO), social distancing has emerged as one of the major factors to avoid the spread of infection. However, different guidelines are being followed across the countries with regards to what should be the safe distance. Thus, the current work is an attempt to understand the virus deposition pattern in the realistic human nasal cavity and also to… More >

  • Open Access

    ARTICLE

    Long-term respiratory outcomes after primary total correction for tetralogy of Fallot and absent pulmonary valve in patient with respiratory symptoms

    Takaya Hoashi1, Toru Iwasa2, Koji Kagisaki1, Masatoshi Shimada1, Kenichi Kurosaki2, Isao Shiraishi2, Hajime Ichikawa1

    Congenital Heart Disease, Vol.12, No.4, pp. 441-447, 2017, DOI:10.1111/chd.12477

    Abstract Objective: To review long-term respiratory outcomes for tetralogy of Fallot and absent pulmonary valve (TOF/APV) in respiratory symptomatic populations.
    Methods: Of 25 consecutive patients undergoing primary total correction for TOF/APV between 1987 and 2016, Sixteen patients (64%) with a preoperative respiratory disturbance were enrolled. The median age at operation was 1.9 months old, including 4 neonates and 12 infants. Ten patients (62.5%) preoperatively necessitated mechanical ventilator support. During operation, dilated central pulmonary arteries (cPAs) were plicated and retracted anteriorly in all patients, except for the first patient of the study cohort. VSD was completely closed, and the right ventricular outflow… More >

  • Open Access

    ARTICLE

    Prenatal detection of critical cardiac outflow tract anomalies remains suboptimal despite revised obstetrical imaging guidelines

    Heather Y. Sun1, James A. Proudfoot2, Rachel T. McCandless1

    Congenital Heart Disease, Vol.13, No.5, pp. 748-756, 2018, DOI:10.1111/chd.12648

    Abstract Background: Fetal echocardiography can accurately diagnose critical congenital heart disease prenatally, but relies on referrals from abnormalities identified on routine obstetrical ultrasounds. Critical congenital heart disease that is frequently missed due to inadequate outflow tract imaging includes anomalies such as truncus arteriosus, double outlet right ventricle, transposition of the great arteries, tetralogy of Fallot, pulmonary stenosis, and aortic stenosis.
    Objective: This study evaluated the prenatal detection rate of critical outflow tract anomalies in a single urban pediatric hospital before and after “AIUM Practice Guideline for the Performance of Obstetric Ultrasound Examinations,” which incorporated outflow tract imaging.
    Design: Infants with outflow… More >

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