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  • Open Access

    ARTICLE

    FUNDAMENTALS AND APPLICATIONS OF NEAR-FIELD RADIATIVE ENERGY TRANSFER

    Keunhan Parka,∗, Zhuomin Zhangb

    Frontiers in Heat and Mass Transfer, Vol.4, No.1, pp. 1-26, 2013, DOI:10.5098/hmt.v4.1.3001

    Abstract This article reviews the recent advances in near-field radiative energy transfer, particularly in its fundamentals and applications. When the geometrical features of radiating objects or their separating distances fall into the sub-wavelength range, near-field phenomena such as photon tunneling and surface polaritons begin to play a key role in energy transfer. The resulting heat transfer rate can greatly exceed the blackbody radiation limit by several orders magnitude. This astonishing feature cannot be conveyed by the conventional theory of thermal radiation, generating strong demands in fundamental research that can address thermal radiation in the near field. More >

  • Open Access

    ARTICLE

    Ureteroscopic biopsy of upper tract urothelial carcinoma using a novel ureteroscopic biopsy forceps

    Shaun E. L. Wason1, John D. Seigne1, Alan R. Schned2, Vernon M. Pais Jr1

    Canadian Journal of Urology, Vol.19, No.6, pp. 6560-6565, 2012

    Abstract Introduction: We sought to assess the adequacy of surgical specimens obtained utilizing the BIGopsy (Cook Medical, Bloomington, IN, USA) biopsy forceps both ex vivo and in vivo and compare them to traditional 3Fr biopsy forceps in patients with suspected upper tract urothelial carcinoma.
    Materials and methods: Patients undergoing nephroureterectomy for suspected upper tract transitional cell carcinoma were recruited. Surgical specimens, immediately after extirpation were examined and alternatively biopsied ex vivo with the BIGopsy and 3Fr biopsy forceps. We then retrospectively reviewed our most recent experience with ureteroscopic biopsy. The biopsy device, size, depth, grade, stage, pathologic diagnosis… More >

  • Open Access

    ARTICLE

    Cross validation of the prostate cancer radiotherapy late toxicity (PCRT) questionnaire with the expanded prostate cancer index composite (EPIC) instrument

    George Rodrigues1,2, Glenn Bauman1, Varagur Venkatesan1, Belal Ahmad1, Michael Lock1, Tracy Sexton1, David D’Souza1, Larry Stitt2, Somaya Eid1,2

    Canadian Journal of Urology, Vol.18, No.4, pp. 5802-5810, 2011

    Abstract Introduction: A 29-item prostate cancer radiotherapy (PCRT) questionnaire with genitourinary (GU), gastrointestinal (GI), and sexual (S) domains has been previously validated for the assessment of late toxicity health-related quality of life (HRQoL) effects. The study objective was to cross-validate the PCRT domains versus the expanded prostate cancer index composite (EPIC) questionnaire urinary (U), bowel (B), hormonal (H), and S subscales.
    Methods and materials: A single-institution cross-sectional PCRT patient cohort was surveyed. Descriptive and intra- and inter-class correlation coefficient statistics for the various EPIC and PCRT HRQoL domain scores were generated. Univariable and multivariable Cox and logistic regressions… More >

  • Open Access

    ABSTRACT

    Deformation mechanisms in advanced Ti-based alloy in instrument-workpiece interaction

    Murat Demiral, Anish Roy, Vadim V. Silberschmidt

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.017.087

    Abstract Industrial applications of Ti-based alloys especially in aerospace, marine and offshore industries have grown significantly over the years primarily due to their high strength, light weight as well as excellent temperature- and corrosion-resistance properties. Since these alloys are hard to machine, there is an obvious demand to develop simulation tools in order to analyze the material's behavior in machining processes, such as a turning, and to optimize process parameters. High levels of strains and strain rates accompanied by generated high temperatures characterize the deformation process in turning. The character of realisation of deformation mechanisms as… More >

  • Open Access

    ARTICLE

    Development of a near-infrared spectroscopy instrument for applications in urology

    Andrew J. Macnab, Lynn Stothers

    Canadian Journal of Urology, Vol.15, No.5, pp. 4233-4240, 2008

    Abstract Introduction: Near infrared spectroscopy (NIRS) is an established technology using photons of light in the near infrared spectrum to monitor changes in tissue of naturally occurring chromophores, including oxygenated and deoxygenated hemoglobin. Technology and methodology have been validated for measurement of a range of physiologic parameters. NIRS has been applied successfully in urology research; however current instruments are designed principally for brain and muscle study.
    Objective: To describe development of a NIRS instrument specifically designed for monitoring changes in chromophore concentration in the bladder detrusor in real time, to facilitate research to establish the role of this… More >

  • Open Access

    EDITORIAL COMMENT

    The Erectile Function Visual Analog Scale (EF-VAS): a disease-specific utility instrument for the assessment of erectile function - Page 3016

    Kok Bin Lim, Gerald B Brock

    Canadian Journal of Urology, Vol.13, No.2, pp. 3026-3026, 2006

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    The Erectile Function Visual Analog Scale (EF-VAS): a disease-specific utility instrument for the assessment of erectile function

    R. Casey1, J. E. Tarride2, M. A. Keresteci3, G. W. Torrance2,4

    Canadian Journal of Urology, Vol.13, No.2, pp. 3016-3025, 2006

    Abstract This article presents the responsiveness results of the Erectile Function Visual Analog Scale (EF-VAS) and reports, for the first time, utilities associated with erectile dysfunction (ED), as calculated by a disease-specific utility assessment. The EF-VAS is a new quality of life (QoL) instrument specific to ED that combines the strengths of the disease-specific approach to measuring QoL (greater disease relevance and responsiveness, with relevance to clinicians and patients) with those of preference-based assessments (generalizability and relevance to decision makers). The EF-VAS has demonstrated feasibility, reliability, and validity as reported in a recent publication.
    Methods: Standard instrument… More >

  • Open Access

    ARTICLE

    On Foundations of the Ultrasonic Non-Destructive Method of Determination of Stresses in Near-the-Surface Layers of Solid Bodies

    Aleksandr N. Guz1

    CMES-Computer Modeling in Engineering & Sciences, Vol.8, No.3, pp. 217-230, 2005, DOI:10.3970/cmes.2005.008.217

    Abstract The ultrasonic non-destructive method of determination of stresses in near-the-surface layers of solid bodies is based on the regularities of elastic surface wave propagation in bodies with initial (residual) stresses. Above mentioned regularities are received in the framework of the 3-D linearized theory of waves propagation in bodies with initial (residual) stresses. Computational methods are used for solution of the dispersion equations as applied to problems under consideration. Description of the non-destructive method and information on instruments and devices for measurements are presented. Some examples of non-destructive determination of stresses in near-the-surface layers of materials More >

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