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  • Open Access

    ARTICLE

    Reliability Analysis for Complex Systems based on Dynamic Evidential Network Considering Epistemic Uncertainty

    Rongxing Duan1, Yanni Lin1, Longfei Hu1

    CMES-Computer Modeling in Engineering & Sciences, Vol.113, No.1, pp. 17-34, 2017, DOI:10.3970/cmes.2017.113.015

    Abstract Fault tolerant technology has greatly improved the reliability of modern systems on one hand and makes their failure mechanisms more complex on the other. The characteristics of dynamics of failure, diversity of distribution and epistemic uncertainty always exist in these systems, which increase the challenges in the reliability assessment of these systems significantly. This paper presents a novel reliability analysis framework for complex systems within which the failure rates of components are expressed in interval numbers. Specifically, it uses a dynamic fault tree (DFT) to model the dynamic fault behaviors and copes with the epistemic More >

  • Open Access

    ARTICLE

    Optimizing the Design of PV Solar Reverse Osmosis Unit (RO/PV) by using Genetic Algorithms for Abu Dhabi Climate

    K. Bououni1, T. Jaber1, S. Elbehissy1

    FDMP-Fluid Dynamics & Materials Processing, Vol.13, No.2, pp. 127-141, 2017, DOI:10.3970/fdmp.2017.013.127

    Abstract The economic progress in the United Arab Emirates (UAE) induces to a significant increase in the demand for agricultural development. In Emirates the majority of the farms are irrigated by underground water, characterized by a high level of salinity. Liwa, Al Ain and Al Khatem areas are suffering from high water well salinity that exceeds 20,000 ppm. This work focuses on this problem and suggests a suitable solution allowing the use of renewable energy (Solar Photovoltaic) to drive RO desalination units. An optimal design of RO/PV unit adapted to a typical farm in Abu Dhabi More >

  • Open Access

    ARTICLE

    Low Velocity Impact Response and Failure Assessment of Textile Reinforced Concrete Slabs

    Subashini I1, a, Smitha Gopinath2, *, Aahrthy R3, b

    CMC-Computers, Materials & Continua, Vol.53, No.4, pp. 291-306, 2017, DOI:10.3970/cmc.2017.053.291

    Abstract Present paper proposes a methodology by combining finite element method with smoothed particle hydrodynamics to simulate the response of textile reinforced concrete (TRC) slabs under low velocity impact loading. For the constitutive modelling in the finite element method, the concrete damaged plasticity model was employed to the cementitious binder of TRC and Von-Mises criterion was used for the textile reinforcement. Strain dependent smoothed particle hydrodynamics (SPH) was used to assess the damage and failure pattern of TRC slabs. Numerical simulation was carried out on TRC slabs with two different volume fraction of glass textile reinforcement More >

  • Open Access

    ARTICLE

    A Machine Learning Approach for MRI Brain Tumor Classification

    Ravikumar Gurusamy1, Dr Vijayan Subramaniam2

    CMC-Computers, Materials & Continua, Vol.53, No.2, pp. 91-108, 2017, DOI:10.3970/cmc.2017.053.091

    Abstract A new method for the denoising, extraction and tumor detection on MRI images is presented in this paper. MRI images help physicians study and diagnose diseases or tumors present in the brain. This work is focused towards helping the radiologist and physician to have a second opinion on the diagnosis. The ambiguity of Magnetic Resonance (MR) image features is solved in a simpler manner. The MRI image acquired from the machine is subjected to analysis in the work. The real-time data is used for the analysis. Basic preprocessing is performed using various filters for noise More >

  • Open Access

    ARTICLE

    The Constitutive Relation of a Fabric Membrane Composite for a Stratospheric Airship Envelope Based on Invariant Theory

    Junhui Meng1,*, Mingyun Lv2

    CMC-Computers, Materials & Continua, Vol.53, No.2, pp. 73-89, 2017, DOI:10.3970/cmc.2017.053.073

    Abstract The study of stratospheric airships has become the focus in many countries in recent years, because of its potential applications in many fields. Lightweight and high strength envelopes are the keys to the design of stratospheric airships, as it directly determines the endurance flight performance and loading deformation characteristics of the airship. A typical envelope of any stratospheric airship is a coated-fabric material which is composed of a fiber layer and several functional membrane layers. According to composite structure, nonlinearity and viscoelasticity are the two main characteristics of such envelope. Based on the analysis on More >

  • Open Access

    ARTICLE

    A Fuzzy Approach for an IoT-based Automated Employee Performance Appraisal

    Jaideep Kaur1, Kamaljit Kaur2

    CMC-Computers, Materials & Continua, Vol.53, No.1, pp. 23-36, 2017, DOI:10.3970/cmc.2017.053.024

    Abstract The ubiquitous Internet of Things (IoT) through RFIDs, GPS, NFC and other wireless devices is capable of sensing the activities being carried around Industrial environment so as to automate industrial processes. In almost every industry, employee performance appraisal is done manually which may lead to favoritisms. This paper proposes a framework to perform automatic employee performance appraisal based on data sensed from IoT. The framework classifies raw IoT data into three activities (Positive, Negative, Neutral), co-locates employee and activity in order to calculate employee implication and then performs cognitive decision making using fuzzy logic. From More >

  • Open Access

    PEDIATRIC UROLOGY

    Technical refinements to improve outcomes following distal hypospadias repair

    John M. Lacy1, Lauren N. Hendrix1, Raevti Bole2, Enmar Habib3, Cole W. Wootton1, Ali M. Ziada1

    Canadian Journal of Urology, Vol.23, No.1, pp. 8184-8187, 2016

    Abstract Introduction: Hypospadias complications, most notably meatal stenosis, are commonly reported to occur after tubularized incised plate (TIP) hypospadias repair. We focus on a point of technique in TIP repair and its effect on outcome of this possible complication, as well as other commonly reported complications. Meatal stenosis after TIP can be avoided if the urethra and overlying glans are dissected and sutured separately with no attempt at cross suturing whether the urethra ends below, behind, or above the glans sutures. This hypothesis was evaluated by a prospective data collection before and after implementation to evaluate the… More >

  • Open Access

    RESIDENT’S CORNER

    “Spousal Revenge Syndrome”- description of a new chronic pelvic pain syndrome patient cohort

    Iryna Makovey, Robert Dolinga, Daniel A. Shoskes

    Canadian Journal of Urology, Vol.23, No.1, pp. 8176-8178, 2016

    Abstract Psychological factors may play a role in the pathophysiology of chronic prostatitis/chronic pelvic pain syndrome (CP/ CPPS). This case series describes a cohort of 10 men presenting with CP/CPPS whose symptoms began after an extramarital sexual encounter, who strongly believed they had a sexually transmitted infection (STI) despite negative testing, and who have had no improvement with empiric antibiotic treatment. Patients’ clinical presentation and physical exam findings are reviewed. All men were clinically phenotyped with the UPOINT system. Pelvic floor spasm and not infection was prominent in these men. Treatment recommendations are proposed and compliance More >

  • Open Access

    REVIEW

    Renal biopsy for medical renal disease: indications and contraindications

    Jathin Bandari, Thomas W. Fuller, Robert M. Turner II, Louis A. D’Agostino

    Canadian Journal of Urology, Vol.23, No.1, pp. 8121-8126, 2016

    Abstract Introduction: Percutaneous renal biopsy (PRB) is a safe and effective modality for sampling kidney tissue. In limited circumstances, alternative methods for kidney biopsy may be indicated. Historical contraindications for PRB such as bleeding diathesis, morbid obesity and solitary kidney have been called into question in the literature. We present a review of the literature on PRB and the risks and benefits associated with alternatives.
    Materials and methods: A review of the literature was performed through MEDLINE and PubMed. A total of 726 articles exist under the query, "percutaneous renal biopsy." Large series describing indications, contraindications, procedural methods,… More >

  • Open Access

    RESIDENT’S CORNER

    Robotic assisted laparoscopic repair of a symptomatic ureterosciatic hernia

    Mikhail Regelman, Jay D. Raman

    Canadian Journal of Urology, Vol.23, No.2, pp. 8237-8239, 2016

    Abstract Ureterosciatic hernias (USH) are a rare entity and to date there have been limited case reports detailing their presentation, diagnosis, and management. Until recently, repair of ureterosciatic hernias has been performed via open, endoscopic, or purely laparoscopic approaches. We present the second known published case of a robotic approach to the USH repair with detailed outline of the surgical technique accompanied by video recording from the operative procedure. More >

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