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2 results

  • Development of modularized in-pipe inspection robotic system: MRINSPECT VII+

  • Heesik Jang, Ho Moon Kim, Min Sub Lee, Yong Heon Song, Yoongeon Lee, Whee Ryeong Ryew, Hyouk Ryeol Choi
  • Journal:
    Robotica / Volume 40 / Issue 5 / May 2022
    Published online by Cambridge University Press:
    03 September 2021, pp. 1361-1384

  • This paper presents a modularized autonomous pipeline inspection robot called MRINSPECT VII+, which we recently developed. MRINSPECT VII+ is aimed at inspect in-service urban gas pipelines with a diameter of 200 mm. The robot consists of five basic modules: driving, sensing, joint, and battery modules. For nondestructive testing (NDT), an NDT module can be added to the system. The driving module uses a multiaxial differential gear mechanism to provide traction forces to the robot. The sensor module recognizes the pipeline element using position-sensitive detector (PSD) sensors and a CCD camera. The control module contains a computing unit and manages the robot’s autonomous navigation. The battery module supplies power to the system. Each module is connected via backdrivable active joint modules, which provide flexibility while moving inside narrow pipelines. Additionally, the wireless communication module helps the system communicate with the ground station. We tested MRINSPECT VII+ in real pipeline environments and validated its feasibility successfully.

  • Borna disease virus and deficit schizophrenia

  • Yong-Ku Kim, Sang-Hyun Kim, Chang-Su Han, Heon-Jeong Lee, Hyung-Seob Kim, Sung-Chul Yoon, Dai-Jin Kim, Ki-Joon Song, Michael Maes, Jin-Won Song
  • Journal:
    Acta Neuropsychiatrica / Volume 15 / Issue 5 / October 2003
    Published online by Cambridge University Press:
    24 June 2014, pp. 262-265
  • Background:

    It is controversial whether Borna disease virus (BDV) infects humans and causes psychiatric disorders.

    Objectives:

    The relationship between BDV infection and schizophrenia with deficit syndrome was investigated.

    Study design:

    Using the Schedule for the Deficit Syndrome, 62 schizophrenic in-patients were selected from three psychiatric hospitals. RNA was extracted from peripheral blood mononuclear cells and analyzed using nested reverse transcriptase-polymerase chain reaction with primers to detect BDV p24 and p40.

    Results and conclusions:

    BDV transcripts were not detected in samples from any of the 62 schizophrenic patients. These data do not support an etiologic association between BDV infection and the deficit form of schizophrenia.