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  • Retractable pen: How it works
      The retractable pen is a truly nice piece of engineering of our everyday life.

      As a tribute to that invention, I prepared an animated three-dimensional model of a retractable pen that visually explains the working principle of this mechanism. My video can be seen on YouTube.
      The 3D model can also be found on Sketchfab.

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C. Yamahata, Ph.D. (2005) and M.Sc. (2000) in Microengineering, graduated from the EPFL (Lausanne, Switzerland).

My R&D activities are mainly focused on the development of Micro Electro Mechanical Systems (MEMS) dedicated to scientific instrumentation.
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capillary passive valve Photograph of a setup using the principle of capillary passive valve to interface a bio-MEMS device with a chamber filled with a culture medium.
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photo microtweezers Photograph of Silicon Microtweezers fabricated by Silicon-On-Insulator (SOI) technology.
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