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  • JLA Vol:24 Iss:5 (<em>Quo vadis</em>, laser additive manufacturing?)


    Authors:
    Ingomar Kelbassa
    Fraunhofer Institute for Laser Technology ILT, Steinbachstrasse 15, 52074 Aachen, Germany and Chair for Laser Technology LLT, RWTH Aachen University, Steinbachstrasse 15, 52074 Aachen, Germany

    Terry Wohlers
    Tim Caffrey
    Wohlers Associates, Inc., OakRidge Business Park, 1511 River Oak Drive, Fort Collins, Colorado 80525


    $25.00

  • JLA Vol:24 Iss:5 (The numerical analysis and measurements of temperature profile in fat tissue during neodymium-doped yttrium aluminum garnet laser irradiation for laser-assisted lipolysis)


    Authors:
    Jong-In Youn
    Department of Biomedical Engineering, College of Medical Science, Catholic University of Daegu, Hayangeup, Gyongsansi, Gyongbuk 712-702, South Korea


    The purpose of the study is to investigate the temperature profile of fat tissue during neodymium-doped yttrium aluminum garnet laser irradiation (1064, 1320, and 1444 nm wavelengths) for laser-assisted lipolysis. The numerical analysis was performed to assess the wavelength dependence of the temperature distribution in fat tissue. For the internal temperature profile measurements, a cannula was placed in the middle of fat tissue for laser irradiation, and two hypodermic thermocouple needles were placed at 2 and 5 mm...

    $25.00

  • JLA Vol:24 Iss:5 (Development of new processes for welding of thermal Al&ndash;Cu solar absorbers using diode lasers)


    Authors:
    Andre Springer
    Peter Kallage
    Michael Hustedt
    Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany

    Stephan Barcikowski
    University of Duisburg-Essen, Technical Chemistry I, Universitaetsstr. 5–7, 45141 Essen, Germany

    Volker Wesling
    Heinz Haferkamp
    Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany


    Flat-plate solar collectors are favorable devices to generate heat from the energy of the Sun. The central part of a collector, the solar absorber, is a front-coated aluminum sheet with a copper tube fixed on the back side in order to transport heated liquid. ...

    $25.00

  • JLA Vol:25 Iss:1 (Spatial analysis of the back reflected laser light during CO<sub>2</sub>-laser cutting of metal sheets)


    Authors:
    David Schindhelm
    Graduate School of Excellence Advanced Manufacturing Engineering in Stuttgart (GSaME), Universita¨t Stuttgart, D-70569 Stuttgart, Germany and Institut fu¨r Strahlwerkzeuge (IFSW), Universita¨t Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Germany

    Rudolf Weber
    Thomas Graf
    Institut fu¨r Strahlwerkzeuge (IFSW), Universita¨t Stuttgart, Pfaffenwaldring 43, D-70569 Stuttgart, Germany


    During laser material processing such as laser welding or cutting, it is known that the whole laser power is not only absorbed in or transmitted through the interaction zone, but a significant percentage is also reflected back ...

    $25.00

  • JLA Vol:25 Iss:1 (Review on laser drilling I. Fundamentals, modeling, and simulation)


    Authors:
    Wolfgang Schulz
    Fraunhofer Institute for Laser Technology, ILT, Aachen, Germany and Nonlinear Dynamics of Laser Processing, RWTH Aachen University, 52074 Germany

    Urs Eppelt
    Nonlinear Dynamics of Laser Processing, RWTH Aachen University, 52074 Germany

    Reinhart Poprawe
    Fraunhofer Institute for Laser Technology, ILT, Aachen, Germany and Nonlinear Dynamics of Laser Processing, RWTH Aachen University, 52074 Germany


    High peak power lasers have been used for years for ablating matter. The most relevant application of this process is laser marking. Marking meets the demands of applications although the quality of ablation has potential to b...

    $25.00

  • JLA Vol:25 Iss:1 (Theoretical analysis of multiple-pulse thermal damage thresholds of the retina)


    Authors:
    C. D. Clark
    TASC Inc., 4141 Petroleum Road, Suite 4007 Fort Sam Houston, Texas 78234

    W. J. Marshall
    Laser Safety Specialties, Wilmington, Delaware 19810

    R. J. Thomas
    Air Force Research Laboratory, 711 HPW/RHDO, 4141 Petroleum Road, Fort Sam Houston, Texas 78234


    In this paper, we present a theoretical analysis of multiple-pulse thermal damage thresholds based on the Arrhenius integral damage model. We consider the dependence of thresholds on both the number of pulses and the pulse spacing and show that the trends can be understood by considering the thermal relaxation time. The biological data that exists in the multiple-pulse therma...

    $25.00

  • JLA Vol:25 Iss:1 (Implementation of a novel scan localization system for wireless sensor networks)


    Authors:
    K. Sun
    W. Huang
    Sachula Meng
    Y. Xiao
    M. T. Wang
    Z. Xiao
    Inner Mongolia University, Hohhot 010021, China


    A novel localization scheme called laser beam scan localization by combining grid and light (laser) with mobile localization policy for wireless sensor networks is designed. The scheme utilizes a moving location assistant (LA) with a laser beam, through which the deployed area is scanned. The LA sends identities to unknown nodes to obtain the locations of sensor nodes. High localization accuracy can be achieved without the aid of expensive hardware on the sensor nodes, as required by other localization systems...

    $25.00

  • JLA Vol:25 Iss:1 (Fatigue crack propagation in laser alloyed ductile cast iron surface)


    Authors:
    Zheng-yang Li
    Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China and Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China

    Hai-yan Zhao
    Yu Gu
    Min-lin Zhong
    Bin Zhang
    Hong-jun Zhang
    Wen-jin Liu
    Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China

    Zhi-yuan Ren
    Ming-jiang Yang

    $25.00

  • JLA Vol:25 Iss:1 (Wettability modification of electrospun poly(&epsilon;-caprolactone) fiber by femtosecond laser irradiation)


    Authors:
    Lingna He
    Dave F. Farson
    Laboratory for Multiscale Processing and Characterization, The Ohio State University, 1248 Arthur E Adams Drive, Columbus, Ohio 43221 and Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Road, Columbus, Ohio 43210

    Jian Chen
    Materials Science and Technology Division, Oak Ridge National Laboratory, One Bethel Road, P.O. Box 2008, MS-6095, Oak Ridge, Tennessee 37831-6095

    John J. Lannutti
    Department of Materials Science and Engineering, The Ohio State University, 477 Watts Hall, 2041 College Road, Columbus, Ohio 43210

    Stan I. Rokhlin
    Labora...

    $25.00

  • JLA Vol:24 Iss:5 (A comparative study of cut front profiles and absorptivity behavior for disk and CO<sub>2</sub> laser beam inert gas fusion cutting)


    Authors:
    Leonardo Daniele Scintilla
    Luigi Tricarico
    Dipartimento di Meccanica, Matematica e Management (DMMM), Politecnico di Bari, Viale Japigia, 182–70126 Bari, Italy

    Achim Mahrle
    Institute of Manufacturing Technology, Technische Universita¨t Dresden, 01062 Dresden, Germany and Fraunhofer IWS Dresden, Winterbergstraße 28, 01277 Dresden, Germany

    Andreas Wetzig
    Fraunhofer IWS Dresden, Winterbergstraße 28, 01277 Dresden, Germany

    Eckhard Beyer
    Institute of Manufacturing Technology, Technische Universita¨t Dresden, 01062 Dresden, Germany and Fraunhofer IWS Dresden, Winterbergstraße 28, 01277 Dres...

    $25.00

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