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  • Open Access

    ARTICLE

    EFFECT OF CYLINDER DIAMETER ON STATE QUANTITIES FOR IRREVERSIBLE PROCESS IN PISTON-CYLINDER SYSTEM

    Siti Nurul Akmal Yusofa , Yutaka Asakoa,*,Mohammad Faghrib , Lit Ken Tana , Nor Azwadi bin Che Sidika, Wan Mohd Arif bin Aziz Japara

    Frontiers in Heat and Mass Transfer, Vol.13, pp. 1-5, 2019, DOI:10.5098/hmt.13.25

    Abstract A numerical analysis for the effect of a cylinder diameter on the state quantities for the irreversible process in a piston-cylinder system was conducted using the LB1S model. The numerical method is based on the ALE method. The cylinder-diameter range of D=0.01 m to 0.10 m was chosen. The effect of the cylinder-diameter on the state quantities was slight in the single compression with the piston velocity of -10 m/s. The ratio of the average pressure to the pressure of the reversible process at the end of the first cycle ranged from 1.00023 to 1.00462 in More >

  • Open Access

    ABSTRACT

    The Effect of Sinus Diameter on the Opening and Closing Performance of Aortic Valve Under the Expansion of Aortic Root

    Qianwen Hou1, Aike Qiao1,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 37-37, 2019, DOI:10.32604/mcb.2019.05717

    Abstract In order to explore the effect of aortic sinus diameter on aortic valve opening and closing performance in the case that aortic valve itself has no obvious disease and aortic root expands continuously. In this study, 20 groups of aortic root models with different aortic sinus and root diameters were constructed according to the size of clinical surgical guidance to simulate the possible expansion of aortic root at the later stage of operation. The valve sinus diameter DS were set to 32 mm, 36 mm, 40 mm and 44 mm, the aortic root diameter DA… More >

  • Open Access

    ARTICLE

    Reversible Data Hiding Based on Pixel-Value-Ordering and Pixel Block Merging Strategy

    Wengui Su1,2, Xiang Wang3,*, Yulong Shen1

    CMC-Computers, Materials & Continua, Vol.59, No.3, pp. 925-941, 2019, DOI:10.32604/cmc.2019.04842

    Abstract With the reversible data hiding method based on pixel-value-ordering, data are embedded through the modification of the maximum and minimum values of a block. A significant relationship exists between the embedding performance and the block size. Traditional pixel-value-ordering methods utilize pixel blocks with a fixed size to embed data; the smaller the pixel blocks, greater is the embedding capacity. However, it tends to result in the deterioration of the quality of the marked image. Herein, a novel reversible data hiding method is proposed by incorporating a block merging strategy into Li et al.’s pixel-value-ordering method,… More >

  • Open Access

    ARTICLE

    SORET AND RADIATION EFFECTS ON AN UNSTEADY FLOW OF A CASSON FLUID THROUGH POROUS VERTICAL CHANNEL WITH EXPANSION AND CONTRACTION

    N. Vijayaa,*, Y. Hari Krishnaa , K. Kalyanib, G.V.R. Reddya

    Frontiers in Heat and Mass Transfer, Vol.11, pp. 1-11, 2018, DOI:10.5098/hmt.11.19

    Abstract The present paper deals with the thermo physical properties of a Casson fluid through an oscillating vertical wall embedded through porous medium under the influence transverse magnetic field, radiation, constant heat source and first order chemical reaction. The radiative heat loss is modelled by using Rosseland approximation. Similarity variables were used to convert the partial differential equations into ordinary differential equation. The transformed ordinary differential equations are solved numerically using Runge - Kutta -Fehlberg method with shooting technique. In order to get perfect perception of the flow pattern we obtain the graphs of axial velocity, More >

  • Open Access

    ARTICLE

    Insurance access in adults with congenital heart disease in the Affordable Care Act era

    Chien-Jung Lin1, Eric Novak1, Michael W. Rich1, Joseph J. Billadello1,2

    Congenital Heart Disease, Vol.13, No.3, pp. 384-391, 2018, DOI:10.1111/chd.12582

    Abstract Background: Adults with congenital heart disease (ACHD) have traditionally been viewed as an underinsured population. Whether this is true in the Affordable Care Act era is unknown. We determined insurance patterns in ACHD patients compared to the non-ACHD cardiology population in a contemporary cohort.
    Methods: All cardiology outpatient visits between July 2016 and February 2017 to a large referral center in the United States were reviewed. The primary payer was categorized as health maintenance organization (HMO), preferred provider organization (PPO), Medicare, Medicaid, self-pay, or other. Diagnosis and lesion severity of ACHD were extracted from ICD-10 diagnostic codes… More >

  • Open Access

    ARTICLE

    Potential spatial expansion of Ulmus macrocarpa population in Keerqin sandy lands, China

    Jianar A, JH Yuan, YF Yang

    Phyton-International Journal of Experimental Botany, Vol.87, pp. 32-39, 2018, DOI:10.32604/phyton.2018.87.032

    Abstract Ulmus macrocarpa Hance can form monodominant woodlands in the semiarid Keerqin sandy lands, China. Methods of sampling at meter intervals from the bases of trees at the woodland edges and isolated trees, respectively, were employed along vertical sections in different directions. Using statistical methods based on the density function of the Weibull distribution, the patterns of seed dispersal and the spatial expansion response of U. macrocarpa, which is a typical anemochorous plant, were analyzed. Although as an effect of the wind direction varying owing to the monsoon, there were differences in the degree of dispersal of seeds… More >

  • Open Access

    ARTICLE

    Extrapolation Method for Cauchy Principal Value Integral with Classical Rectangle Rule on Interval

    Maohui Xia1, Jin Li*,2

    CMES-Computer Modeling in Engineering & Sciences, Vol.115, No.3, pp. 313-326, 2018, DOI:10.3970/cmes.2018.08053

    Abstract In this paper, the classical composite middle rectangle rule for the computation of Cauchy principal value integral (the singular kernel 1/(x-s)) is discussed. With the density function approximated only while the singular kernel is calculated analysis, then the error functional of asymptotic expansion is obtained. We construct a series to approach the singular point. An extrapolation algorithm is presented and the convergence rate of extrapolation algorithm is proved. At last, some numerical results are presented to confirm the theoretical results and show the efficiency of the algorithms. More >

  • Open Access

    ARTICLE

    Symmetric Learning Data Augmentation Model for Underwater Target Noise Data Expansion

    Ming He1,2, Hongbin Wang1,*, Lianke Zhou1, Pengming Wang3, Andrew Ju4

    CMC-Computers, Materials & Continua, Vol.57, No.3, pp. 521-532, 2018, DOI:10.32604/cmc.2018.03710

    Abstract An important issue for deep learning models is the acquisition of training of data. Without abundant data from a real production environment for training, deep learning models would not be as widely used as they are today. However, the cost of obtaining abundant real-world environment is high, especially for underwater environments. It is more straightforward to simulate data that is closed to that from real environment. In this paper, a simple and easy symmetric learning data augmentation model (SLDAM) is proposed for underwater target radiate-noise data expansion and generation. The SLDAM, taking the optimal classifier… More >

  • Open Access

    ARTICLE

    Neuraminidase enhances in vitro expansion of human erythroid progenitors

    Gwellaouen Bodivit1,2, Philippe Chadebech1,2, Isabelle Vigon4,5,6,8, Azzedine Yacia4,5,6, Nicolas Burin des Roziers1,2,9, France Pirenne1,2,3,a, Serge Fichelson4,5,6,7,a

    European Cytokine Network, Vol.27, No.2, pp. 23-33, 2016, DOI:10.1684/ecn.2016.0374

    Abstract Background: In spite of recent key improvements, in vitro mass production of erythrocytes from human stem cells is still limited by difficulties in obtaining sufficient numbers of erythroid progenitors. In fact, such progenitors are as scarce in the bone marrow as in peripheral blood. Study design and Methods: We used a two-step culture model of human cord blood-derived erythroid progenitors in the presence or absence of highpurity neuraminidase, in a serum-free, defined culture medium. Granulocytic and megakaryocytic progenitor cell expansions were also studied. Results: We show that significant enhancement of erythroid cell generation is obtained… More >

  • Open Access

    ARTICLE

    ASYMMETRIC FLOW OF A NANOFLUID BETWEEN EXPANDING OR CONTRACTING PERMEABLE WALLS WITH THERMAL RADIATION

    A. Vijayalakshmi, S. Srinivas*

    Frontiers in Heat and Mass Transfer, Vol.7, pp. 1-11, 2016, DOI:10.5098/hmt.7.10

    Abstract In the present study, the flow and heat transfer characteristics of a nanofluid in an expanding or contracting porous channel with different permeabilities in presence of thermal radiation are investigated. Analytical solutions for the flow variables are obtained by employing homotopy analysis method (HAM). Maxwell-Garnetts and Brinkman models are considered to calculate the thermal conductivity and the viscosity of nanofluid. In this investigation, we considered water and ethylene glycol as base fluids and silver ( Ag ), copper ( Cu ), titanium dioxide ( TiO2 ) and alumina ( Al2O3 ) as nanoparticles. The effects of various More >

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