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  • Open Access

    ARTICLE

    Secure and Optimal LOADng Routing for IoT with Composite Routing Metric

    Divya Sharma1,*, Sanjay Jain2, Vivek Maik3

    CMC-Computers, Materials & Continua, Vol.74, No.1, pp. 655-669, 2023, DOI:10.32604/cmc.2023.032207 - 22 September 2022

    Abstract Security is the one of the major challenges for routing the data between the source and destination in an Internet of Things (IoT) network. To overcome this challenge, a secure Lightweight On-demand Ad hoc Distance-vector—Next Generation (LOADng) Routing Protocol is proposed in this paper. As the LOADng protocol is the second version of Ad Hoc On-Demand Distance Vector (AODV) protocol, it retains most of the basic functionality and characteristics of AODV. During the route discovery process, the cyclic shift transposition algorithm (CSTA) is used to encrypt the control packets of the LOADng protocol to improve its security. More >

  • Open Access

    ARTICLE

    Improved Staggered Algorithm for Phase-Field Brittle Fracture with the Local Arc-Length Method

    Zhijian Wu, Li Guo*, Jun Hong

    CMES-Computer Modeling in Engineering & Sciences, Vol.134, No.1, pp. 611-636, 2023, DOI:10.32604/cmes.2022.020694 - 24 August 2022

    Abstract The local arc-length method is employed to control the incremental loading procedure for phase-field brittle fracture modeling. An improved staggered algorithm with energy and damage iterative tolerance convergence criteria is developed based on the residuals of displacement and phase-field. The improved staggered solution scheme is implemented in the commercial software ABAQUS with user-defined element subroutines. The layered system of finite elements is utilized to solve the coupled elastic displacement and phase-field fracture problem. A one-element benchmark test compared with the analytical solution was conducted to validate the feasibility and accuracy of the developed method. Our More >

  • Open Access

    ARTICLE

    Fin Field Effect Transistor with Active 4-Bit Arithmetic Operations in 22 nm Technology

    S. Senthilmurugan1,*, K. Gunaseelan2

    Intelligent Automation & Soft Computing, Vol.35, No.2, pp. 1323-1336, 2023, DOI:10.32604/iasc.2023.027650 - 19 July 2022

    Abstract A design of a high-speed multi-core processor with compact size is a trending approach in the Integrated Circuits (ICs) fabrication industries. Because whenever device size comes down into narrow, designers facing many power density issues should be reduced by scaling threshold voltage and supply voltage. Initially, Complementary Metal Oxide Semiconductor (CMOS) technology supports power saving up to 32 nm gate length, but further scaling causes short severe channel effects such as threshold voltage swing, mobility degradation, and more leakage power (less than 32) at gate length. Hence, it directly affects the arithmetic logic unit (ALU),… More >

  • Open Access

    ARTICLE

    Trend Autoregressive Model Exact Run Length Evaluation on a Two-Sided Extended EWMA Chart

    Kotchaporn Karoon, Yupaporn Areepong*, Saowanit Sukparungsee

    Computer Systems Science and Engineering, Vol.44, No.2, pp. 1143-1160, 2023, DOI:10.32604/csse.2023.025420 - 15 June 2022

    Abstract The Extended Exponentially Weighted Moving Average (extended EWMA) control chart is one of the control charts and can be used to quickly detect a small shift. The performance of control charts can be evaluated with the average run length (ARL). Due to the deriving explicit formulas for the ARL on a two-sided extended EWMA control chart for trend autoregressive or trend AR(p) model has not been reported previously. The aim of this study is to derive the explicit formulas for the ARL on a two-sided extended EWMA control chart for the trend AR(p) model as well as… More >

  • Open Access

    ARTICLE

    The effect of day of discharge on hospital readmission after minimally invasive partial nephrectomy

    Kristian D. Stensland1,2, Joan C. Delto3, Navneet Ramesh4, Chris Robertson4, Jared P. Schober1, Peter Chang5, Andrew A. Wagner5

    Canadian Journal of Urology, Vol.29, No.2, pp. 11080-11086, 2022

    Abstract Introduction: To assess the association between postoperative discharge day after minimally invasive partial nephrectomy with 30-day readmission rates, and specifically compare postoperative day 1 to postoperative day 2 discharge. We hypothesized that discharge on earlier postoperative days would be associated with higher rates of readmission after partial nephrectomy.
    Materials and methods: The National Cancer Database was queried for patients undergoing minimally invasive partial nephrectomy for non-metastatic disease without chemo or radiation therapy from 2010-2014. Readmission rates were compared between postoperative discharge days. Multivariable logistic regression was used to analyze variables associated with 30-day readmission.
    Results: A total of… More >

  • Open Access

    ARTICLE

    Considerations in ureteral stent selection in order to minimize symptoms

    Rathika R. Ramkumar1, Sasha Vereecken2, Tyler Williams3, Smita De1

    Canadian Journal of Urology, Vol.29, No.4, pp. 11231-11242, 2022

    Abstract Introduction: Ureteral stent-related symptoms are common after stent placement. Various characteristics of stent design have been previously investigated to mitigate this issue. Our review summarizes available literature on stent design parameters (diameter, material, position, length, distal loop modifications) and their effect on stent-related symptoms, including pain.
    Materials and methods: We identified articles from PubMed, Medline, EMBASE, Web of Science, and Grey Literature using a search strategy employing MESH search headings (i.e., ureteral stent diameter, length, composition, material, durometer, and stent-related pain).
    Results: Out of 2,970 identified studies, 26 met eligibility criteria. Most diameter studies found patients with >… More >

  • Open Access

    ARTICLE

    CFD SIMULATION OF REACTIVE FLOW IN COUNTER FLOW SHAFT KILNS USING POROUS MEDIA MODEL

    Kamyar Mohammadpour*, Ali Chitsazan, Eckehard Specht

    Frontiers in Heat and Mass Transfer, Vol.19, pp. 1-8, 2022, DOI:10.5098/hmt.19.37

    Abstract The length of flame and behavior of the flame and homogenization in temperature distribution play the main roles to obtain a better quality of lime. Performing experiments in a real lime shaft kiln plant are quite complicated. A lime shaft kiln normally has a large geometry, including a height of 15 meters and a diameter of 3 meters, and is filled with large stones moving in a vertical direction. In most cases, the measuring instruments are damaged. Due to these difficulties, modeling of physical and chemical processes is required for having a better understanding of… More >

  • Open Access

    ARTICLE

    CONSIDERATION OF INFLUENCING PARAMETERS ON THE FLAME LENGTH IN PARALLEL FLOW REGENERATIVE SHAFT KILNS USING POROUS MEDIA MODEL

    Kamyar Mohammadpour, Ali Chitsazan, Eckehard Specht

    Frontiers in Heat and Mass Transfer, Vol.19, pp. 1-5, 2022, DOI:10.5098/hmt.19.34

    Abstract Understanding the flow pattern of the gas jets in packed beds can have considerable significance in improving reactor design and process optimization. This study researches the fuel diffusion in the radial direction and the flame length in a packed bed of a Parallel Flow Regenerative (PFR) Shaft kiln. This kiln is characterized that the fuel being injected vertically into the packed bed using a lot of lances in the cross-section while the combustion air is distributed continuously. The packed bed approximated as a porous media and the measured values match approximately with those calculated with More >

  • Open Access

    ARTICLE

    Speed-Direction Sensing under Multiple Vehicles Scenario Using Photonic Radars

    Abhishek Sharma1, Sushank Chaudhary2,*, Jyoteesh Malhotra3, Muhammad Saadi4, Sattam Al Otaibi5, Lunchakorn Wuttisittikulkij2

    CMC-Computers, Materials & Continua, Vol.73, No.3, pp. 5399-5410, 2022, DOI:10.32604/cmc.2022.031173 - 28 July 2022

    Abstract Recent reports from World Health Organization (WHO) show the impact of human negligence as a serious concern for road accidents and casualties worldwide. There are number of reasons which led to this negligence; hence, need of intelligent transportation system (ITS) gains more attention from researchers worldwide. For achieving such autonomy different sensors are involved in autonomous vehicles which can sense road conditions and warn the control system about possible hazards. This work is focused on designing one such sensor system which can detect and range multiple targets under the impact of adverse atmospheric conditions. A More >

  • Open Access

    ARTICLE

    Optimization Analysis of the Mixing Chamber and Diffuser of Ejector Based on Fano Flow Model

    Lixing Zheng1,*, Weibo Wang2, Yiyan Zhang1, Lingmei Wang3, Wei Lu2

    CMES-Computer Modeling in Engineering & Sciences, Vol.133, No.1, pp. 153-170, 2022, DOI:10.32604/cmes.2022.021235 - 18 July 2022

    Abstract An improved model to calculate the length of the mixing chamber of the ejector was proposed on the basis of the Fano flow model, and a method to optimize the structures of the mixing chamber and diffuser of the ejector was put forward. The accuracy of the model was verified by comparing the theoretical results calculated using the model to experimental data reported in literature. Variations in the length of the mixing chamber Lm and length of the diffuser Ld with respect to variations in the outlet temperature of the ejector Tc, outlet pressure of the ejector… More >

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