My Spreadsheet Doesn’t Do That! (Excel 1992 vs. Today’s Technologies) Christophe Yamahata 2026-09-22 | My Spreadsheet Doesn’t Do That! (Excel 1992 vs. Today’s Technologies)
Citrus sprayer (3D model) Christophe Yamahata 2022-08-02 | 3D animation published on Sketchfabhttps://sketchfab.com/3d-models/citru...Original kitchenware designed by LékuéSoundtrack: Bon Entendeur vs. Pierre Bachelet - Coup de têteVideo created with DaVinci Resolve 18
A 3D model of the double-headed serpent Christophe Yamahata 2022-01-28 | 3D model showing the left head of the double-headed serpent (Turquoise mosaic on wood. Mixtec-Aztec, AD 1400-1521, British Museum). Completed using: Meshroom, SpaceClaim, MeshLab, Photoshop, KeyshotCheck out this 3D model on Sketchfab: skfb.ly/o8WZ9Musique utilisée dans cette vidéo
Automated photolithography with the idonus UV-EXP150R mounted on an XY stage Christophe Yamahata 2021-01-22 | Here is a video prepared for the company idonus (www.idonus.com). ---A client needed to perform UV photolithography (365 nm wavelength) on wide panels.At idonus, we offered him to combine the idonus UV-LED exposure system UV-EXP150R with a motorized XY stage. We first needed to adapt the XY stage in order for the motors to be able to move a payload of more than 50 kg.The exposure cycle is launched with a dedicated graphical user interface (GUI).A programmable logic controller (PLC) drives the motorized stage and the UV-EXP150R.The end user simply needs to save his parameters in a CSV files that contains: the X and Y coordinates, the exposure settings.
Portuguese retrograde mechanism Christophe Yamahata 2018-10-21 | You can download this 3D model on GrabCAD: grabcad.com/library/portuguese-retrograde-mechanism-1
Pallweber mechanism: How it works Christophe Yamahata 2018-10-20 | The IWC Tribute to Pallweber Edition “150 years” is a wristwatch with jumping numerals. Contrary to the historical pocket watches, in the IWC-manufactured 94200 calibre, the display discs are powered using a separate barrel. In this way, the flow of power in the main gear train is unaffected.I made this model entirely from scratch, just from a few photos of the wristwatch. You can download the 3D model of this mechanism on GrabCAD: grabcad.com/library/iwc-tribute-to-pallweber-1There, you can find the SpaceClami CAD model and a fully animated Blender file.You can appreciate the jumping mechanism when the time changes from 9:59 to 10:00.
IWC Pellaton mechanism Christophe Yamahata 2018-10-20 | This mechanism was invented by Albert Pellaton to rewind the mainspring in mechanical watches.Download the 3D model on GrabCAD: grabcad.com/library/pellaton-mechanism-1
Bat flight deconstructed Christophe Yamahata 2017-05-21 | Motion tracking of an egyptian fruit bat flight performed using Adobe After Effects CC 2014.Original footage: slow motion video from the Organization for Bat Conservation (youtu.be/YTKNZDjSaXQ)Video inspired by the work of Eleanor Lutz (http://tabletopwhale.com/2014/09/29/flight-videos-deconstructed.html)
Water-cooled rotary union designed for high vacuum Christophe Yamahata 2017-04-01 | This water-cooled rotary union is designed to work beneath a high energy ion beam, inside a high vacuum chamber. This system is used in a surface treatment machine to actively cool down parts that are being homogeneously treated.The system was entirely designed and manufactured by idonus' team.---Soundtrack: WhoMadeWho - "Heads Above"
Retractable pen (click pen): How it works Christophe Yamahata 2016-09-27 | This animated three-dimensional model of a retractable pen visually explains the working principle of this mechanism. A truly nice piece of engineering of our everyday life.The 3D model can be accessed on Sketchfab [ skfb.ly/Tq9N ]
Midnight Nuit Lumineuse: Piezoelectric effect used to backlight the dial of a mechanical watch Christophe Yamahata 2016-01-24 | During the SIHH 2016, Van Cleef & Arpels unveiled its first Poetic Complication™ that creates a luminous motif illuminating the dial.In this watch, two piezoceramic beams are made to vibrate and the generated electricity is directly converted into light. Light Emitting Diodes backlight six of the diamonds set in the dial.---Van Cleef & Arpels a présenté la Midnight Nuit Lumineuse au SIHH 2016. Cette complication horlogère utilise l'effet piézoélectrique pour convertir l'énergie mécanique en électricité et alimenter des LED blanches.
Modern Times: A sequence with many many gears (frame by frame analysis of the factory scene) Christophe Yamahata 2015-09-17 | I was looking for a video with gears as I wanted to illustrate how discrete Fourier analysis could be used to measure displacement with subpixel resolution.Modern Times is a great choice, a movie with many many gears...The HQ sequence was extracted from the restored version presented in 2003. youtu.be/D2AEcUc8tOAnano+ is a small Matlab GUI dedicated to the measurement of in-plane linear displacements of MicroElectroMechanical Systems (MEMS). See http://dx.doi.org/10.1109/JMEMS.2010.2067445 for scientific details.
Experimental setup used for the trapping of DNA bundles with silicon tweezers. Christophe Yamahata 2015-08-28 | In an article published in Biophysical Journal 94 (1), pp. 63-70, 2008 (DOI: 10.1529/biophysj.107.115980), we have studied the electrical properties of DNA bundles captured between silicon tweezers. This video shows the experimental setup used for DNA trapping.
Visualization of Nutrient Pollution in the USA using Voronoi Tessellation Christophe Yamahata 2015-08-20 | This sequence shows how Voronoi tessellationwas used to visualize inorganic nitrogen (nitrate & nitrite) concentration levels in water media. The interactive map was built with d3.js, a powerful JavaScript library.The interactive map is viewable at the URL: http://c.yamahata.fr/NutriViz/
Folded-beam suspension: How it works Christophe Yamahata 2015-03-24 | Flexible bearings are advantageous for microelectromechanical systems (MEMS) as they enable precise, accurate, repeatable, and reliable motion without frictional contact.This animation shows the deformation of a rotary folded-beam suspension. Finite Element Analysis performed with SolidWorks Simulation.Publications on this topic:http://dx.doi.org/10.1109/JMEMS.2012.2189367http://dx.doi.org/10.1109/JMEMS.2010.2040139
Electromagnetically actuated nozzle-diffuser micropump Christophe Yamahata 2015-01-08 | Nozzle-diffuser elements are interesting structures that can be used to build "valveless" reciprocating micropumps. In this video we demonstrate that the designed micropump is bubble-tolerant (it is also self-priming).
Micromanipulation of a DNA bundle with silicon nanotweezers Christophe Yamahata 2015-01-07 | Electrostatically actuated silicon nanotweezers are intended for the manipulation and characterization of filamentary molecules. The microelectromechanical system consists of a pair of opposing tips whose distance can be accurately adjusted by means of an integrated differential capacitive sensor. The fabrication process is based on silicon-on-insulator technology and combines KOH wet anisotropic etching and deep reactive ion etching of silicon to form sharp nanotips and high aspect ratio microstructures, respectively. The device was used to perform static and dynamic mechanical manipulations on DNA molecules.
HAREM: High Aspect Ratio Etching & Metallization Christophe Yamahata 2015-01-07 | HAREM is a simple bulk micromachining method for the fabrication of high aspect ratio monocrystalline silicon MEMS (microelectromechanical systems) in a standard silicon wafer. We called this two-mask microfabrication process "High Aspect Ratio Etching & Metallization" or HAREM. It combines double-side etching and metallization to create suspended micromechanical structures with electrically 'insulating walls' on their backside
GyroTracker | VeoSwiss Christophe Yamahata 2015-01-06 | Plate-forme manuelle pour la caractérisation de l'organe réglant des calibres mécaniques.
Noise cancelling : A simple demonstration Christophe Yamahata 2014-09-30 | A simple demonstration of noise cancelling using a Hi-Fi stereo system and a mono sound recording. One just needs to invert connections on one speaker.
Butterfly pivot (S. Henein, P. Spanoudakis) Christophe Yamahata 2014-03-20 | Butterfly pivot designed at CSEM by Henein and Spanoudakis
Pivot plate motion (S. Henein, P. Spanoudakis) Christophe Yamahata 2014-03-20 | Butterfly pivot designed at CSEM by Henein and Spanoudakis
How a Watch Works Christophe Yamahata 2012-02-13 | Vintage video (1949) from Hamilton Watch Co. explaining how a mechanical watch works.This short movie gives a simple demonstration of the working principle of a mechanical watch. "The inside story of a fine watch" is shown on a giant in-line movement, exact and to scale in every detail. The function of each part is demonstrated as the huge watch is assembled and disassembled.This is a shorten version of the original movie (1949) produced by the Jam Handy Orginization for Hamilton Watch Company.The original version can be downloaded on archive.org(http://archive.org/details/HowaWatc1949)
Single-Mask Rotary Stepper Micromotor Fabricated with SOI Technology Christophe Yamahata 2011-10-05 | 3-phase electrostatic rotary stepper micromotor fabricated with Silicon-On-Insulator technology (single-mask micromachining process). A differential capacitive sensor has been integrated for angular measurements.
Two-Mask Rotary Stepper Micromotor Fabricated with SOI Technology Christophe Yamahata 2011-10-05 | 3-phase electrostatic rotary stepper micromotor fabricated with Silicon-On-Insulator technology (two-mask micromachining process)
nano+ software demonstration Christophe Yamahata 2011-05-22 | Demonstration video showing the software nano+ in action (http://lmis2.epfl.ch/nanoplus/)
Electrostatic Rotary Stepper Micromotor Christophe Yamahata 2010-12-27 | 3-phase electrostatic rotary stepper micromotor in silicon fabricated by vertical trench isolation technology.
Electrostatic 3-Phase Linear Stepper Micromotor Fabricated by Vertical Trench Isolation Technology Christophe Yamahata 2009-02-04 | Linear stepper micromotor moving back and forth
