As a part of making the debut "Meet the MakerBot Operator" profile video, I worked with the Nick and Winter to co-create the "MakerBot Operators Tips" video released here. When downloading objects from Thingiverse.com, Nick and Winter take time to repair manifold ("water-tightness") issues with models before feeding them into Skeinforge to create printable gcode. Skeinforge takes an .stl file, an abstract representation for a volume, and interprets the linear printable path that will allow the MakerBot to print it. While any number of CAD and 3D design tools can export .stl files at the end of the chain, unless the object is manifold/"water-tight" (separating the surface from the interior volume it contains) it is difficult for Skeinforge to trace a linear path. After Nick and Winter fix the model to make it well and truly manifold, they take the time to re-post the fix back to Thingiverse as a derivative to help others print the object more easily. This is, in my opinion at least, a pretty awesome community service that helps everyone print objects more easily.. + Informações

"In this work, we present a novel technique for realistically removing static or moving objects in a video sequence obtained by a perspective camera. Different from previous efforts, which are typically based on processing in the 3D data volume, we slice the volume along the motion manifold of the moving object, and therefore reduce the search space from 3D to 2D, while still preserving the spatial and temporal coherence. In addition to the computational efficiency, based on geometric video analysis, the proposed approach is also able to handle real videos under perspective distortion, as well as common camera motions, such as panning, tilting, and zooming. The experimental results demonstrate that our algorithm performs comparably to 3D search based methods, but extends the current state-of-the-art techniques to videos with projective effects, as well as illumination changes. We treat a video sequence as a space time 3D volume. Keeping the temporal coherence then becomes equivalent to preserving the smoothness of space-time motion trajectories of pixels. We construct the sub-manifolds (Figure 1 (c)) of the space-time volume, which we refer to as the motion manifolds, where the entire trajectory of a pixel is projected on to a 2D curve, thus reducing the search space from 3D to 2D. By enforcing spatial and temporal coherence in the propagation of the manifold to the areas of missing data due to object removal, we can restore a visually realistic video sequence with no or .... + Informações

Dr Hinke Osinga and Professor Bernd Krauskopf have turned the famous Lorenz equations that describe the nature of chaotic systems into a beautiful real-life object, by crocheting computer-generated instructions. Together all the stitches define a complicated surface, called the Lorenz manifold. I made it and if you also want to crochet an artwork, here is all information www.enm.bris.ac.uk More of my craft www.stricktagebuch.de. + Informações

"In this work, we present a novel technique for realistically removing static or moving objects in a video sequence obtained by a perspective camera. Different from previous efforts, which are typically based on processing in the 3D data volume, we slice the volume along the motion manifold of the moving object, and therefore reduce the search space from 3D to 2D, while still preserving the spatial and temporal coherence. In addition to the computational efficiency, based on geometric video analysis, the proposed approach is also able to handle real videos under perspective distortion, as well as common camera motions, such as panning, tilting, and zooming. The experimental results demonstrate that our algorithm performs comparably to 3D search based methods, but extends the current state-of-the-art techniques to videos with projective effects, as well as illumination changes. We treat a video sequence as a space time 3D volume. Keeping the temporal coherence then becomes equivalent to preserving the smoothness of space-time motion trajectories of pixels. We construct the sub-manifolds (Figure 1 (c)) of the space-time volume, which we refer to as the motion manifolds, where the entire trajectory of a pixel is projected on to a 2D curve, thus reducing the search space from 3D to 2D. By enforcing spatial and temporal coherence in the propagation of the manifold to the areas of missing data due to object removal, we can restore a visually realistic video sequence with no or .... + Informações

Google Tech Talks May 1, 2007 ABSTRACT Images and videos form a rich source of information about the visual world. The extraction of 3D information from images is an important research problem in computer vision and graphics. The ubiquitous presence of cameras and the tremendous advances of processing and communication technologies yields important opportunities and challenges in those areas. My work has focused on developing flexible techniques for recovering 3D shape, motion and appearance from images. A first example of this is an approach to recover photo-realistic 3D models of static objects or scenes from videos recorded with a hand-held camera or on a moving vehicle. A key aspect of.... + Informações

We propose a novel nonlinear, probabilistic and variational method for adding shape information to level set-based segmentation and tracking. Unlike previous work, we represent shapes with elliptic Fourier descriptors and learn their lower dimensional latent space using Gaussian Process Latent Variable Models. Segmentation is done by a nonlinear minimisation of an image-driven energy function in the learned latent space. We combine it with a 2D pose recovery stage, yielding a single, one shot, optimisation of both shape and pose. We demonstrate the performance of our method, both qualitatively and quantitatively, with multiple images, video sequences and latent spaces, capturing both shape kinematics and object class variance.. + Informações

Manipulating objects in hand requires complex, coordinated motions of all finger joints of a hand, which accumulate to 20 or more degrees of freedom. Observing, representing, and reproducing those motions is a challenging task. Using Unsupervised Kernel Regression (UKR) we trained low-dimensional smooth manifolds to represent complex hand motions, eg the cap-turning motion. The training data are acquired using a data glove which controls a simulated object. Using the visual feedback from the simulation the learning capabilities of the human are used to realize the mapping from human hand to robot hand motions. The trained manifold can be used to realize appropriate motions on a real robot hand. Ref: ni.www.techfak.uni-bielefeld.de. + Informações

Homepage: people.umass.edu Copyright 2010 © The 21st Century Monads. Music by Kris McDaniel, Ben Bradley, Carrie Jenkins. Lyrics by Kris McDaniel. Ben Bradley ? electric bass, electric guitar Carrie Jenkins ? vocals Kris McDaniel ? vocals, electric guitar, edrums, synthesizers Carrie's parts were recorded by Carrie in Nottingham. Kris and Ben's parts were recorded by Kris and Ben in Syracuse. Song engineered by Kris McDaniel. Art by Paul Prescott. LYRICS: An intuition Is a fusion of impressions Through which an object Is immediately given But if that is all you got You don't got enough to have a thought You need a concept That comes from the understanding Synthesize the manifold Well, a concept Is a mediate representation Which would be empty With no corresponding intuition The imagination plays a role as well But whatever it does, no one can tell All combination Is due to the understanding Synthesize the manifold. + Informações

www.ansys.com presents a short tutorial on the typical setup for a Tetra Prism Mesh with ANSYS ICEM CFD. + Informações

Andrei Sharf, Dan Alcantara, Thomas Lewiner, Chen Greif, Alla Sheffer, Nina Amenta, Daniel Cohen-Or We introduce a volumetric space-time technique for the reconstruction of moving and deforming objects from point data. The output of our method is a four-dimensional space-time solid, made up of spatial slices, each of which is a three-dimensional solid bounded by a watertight manifold. The motion of the object is described as an incompressible flow of material through time. We optimize the flow so that the distance material moves from one time frame to the next is bounded, the density of material remains constant, and the object remains compact. This formulation overcomes deficiencies in the acquired data, such as persistent occlusions, errors, and missing frames. We demonstrate the performance of our flow-based technique by reconstructing coherent sequences of watertight models from incomplete scanner data.. + Informações

www.cosmowenman.com After two false starts, here's my first successful print of a custom object - an extrusion prototype for eventual manufacture in stainless or brass. I designed the object in Sketchup with the Replicator specs in mind; the object's walls are all .4mm thick, which is the print nozzle's diameter. The result is that the walls are only one layer thick - as hollow as possible. This reduced plastic consumption, made for a faster print, and, I'm guessing, reduced the chances for bad prints - less run time, less chance for random screwups. This also allowed me to directly determine the print path, and set the point for Z axis movement to an internal wall where it won't show. Even though the thing is completely hollow, as far as ReplicatorG, the .s3g file, and the printer know, this object is a watertight manifold. I made a thick sacrificial base with tendrils extending outward in order to coax ReplicatorG into make an extra broad raft. That, and setting the build platform temperature to 115 seemed to prevent the object from curling up and coming unstuck from the platform (as shown in the beginning of the video). As for the video itself, I only used one camera this time, but I managed to get it sufficiently blurry, shaky, and off target, so it's all good. I'm still exploring the motif of annoying electronica soundtracks for my MakerBot series - I think The Salmon Dance fit nicely on this one. Next time around I may work in some Die Antwoord - something off their .... + Informações

A mathematician named Klein Thought the Möbius band was divine. Said he: "If you glue The edges of two, You'll get a weird bottle like mine." The Klein bottle can be constructed (in a mathematical sense, because it cannot be done without allowing the surface to intersect itself) by joining the edges of two Möbius strips together, as described in the previous anonymous limerick: In mathematics, the Klein bottle ( /?kla?n/) is a non-orientable surface, informally, a surface (a two-dimensional manifold) in which notions of left and right cannot be consistently defined. Other related non-orientable objects include the Möbius strip and the real projective plane. Whereas a Möbius strip is a surface with boundary, a Klein bottle has no boundary. (For comparison, a sphere is an orientable surface with no boundary.) The Klein bottle was first described in 1882 by the German mathematician Felix Klein. It may have been originally named the Kleinsche Fläche ("Klein surface") and that this was incorrectly interpreted as Kleinsche Flasche ("Klein bottle"), which ultimately led to the adoption of this term in the German language as well.[1] Like the Möbius strip, the Klein bottle is a two-dimensional differentiable manifold which is not orientable. Unlike the Möbius strip, the Klein bottle is a closed manifold, meaning it is a compact manifold without boundary. While the Möbius strip can be embedded in three-dimensional Euclidean space R3, the Klein bottle cannot. It can be embedded in .... + Informações

Frederick Valentich Australian UFO case from 1978 includes the Roy Manifold picture.. + Informações

4600rpm 14ipm 3 flute ball endmill. here you can see how the contour was cut. i needed a way to hold the part down, so i used 3 of the 6 holes in the part. i previously drilled and tapped the 3 points before placing the stock, (luckily) they lined up and the part didn't move between mounting transitions. my camera battery was going dead, or i would have made it longer. all programmed in mastercam x. + Informações

object oriented. (object within an object within an object.....part within a part within a part) Mereology, Set theory, Hierarchy, Directed acyclic graph, Foundations of mathematics, Homotopy, Topological space, topology, Manifold ,. + Informações

Episode 9 of UFONAUT AUSTRALIA featuring Part 1 of the 2 part series, The Frederick Valentich UFO case and another interesting UFO case The Tully Saucer Nest incident. + Informações

Video clip of MGTF Turbo exhaust manifold glowing red hot under continious load. Note round object in center of video - this is bottom section of a genuine Tial 38 mm wastegate.. + Informações

Shows a connector model that was loaded from a step file and tessellated for display. The model is a solid model done using Non-Manifold Topology. + Informações

Change to 480p of course. I didnt capture my mouse but you should be able to follow this tutorial fine. Sorry I got the new SnagIt and yup no curor showed for the video. Wont happen again. I'm just learning all this so there may be a easier or better way of doing this tutorial. I made this to explain how I do it:) The original model's parts all have to be joined together. In Object mode press "A" key and press Ctrl + J to join them all. The model might get a error while trying to use the decimate modifier. Something like your model is a non-manifold or something. Make sure the model is a clean mess. Try to have no internal geometry, no 2 sided face(I think). Press Shift + Ctrl + Alt + M to see non-manifolds. Try and fix it if you can if thats the reason why the decimate isnt working.Try and merge if u can. Most of all make sure to remove doubles. You need to be in GLSL shading with a lamp when baking. As far as I know anyways. Thats all I can think of for now.. + Informações

- Revolutionary to the Industry! Auto-retopology, (AUTOPO), with user defined guides for accurate edge loops. Use a convenient wizard to help you identify desired areas of mesh density and to define the flow of edge loops. - Non-connected objects are supported. - Import you objects directly for AUTOPO from the "File/Import" menu. It will automatically close holes, convert to voxels, and create a practical, organized mesh. - AUTOPO automatically cleans up any non-manifold topology to avoid any subsequent problems. - Total number of triangles, quads and n-gons are visible in the Retopo Room. Each polygon type can be individually selected, for clarification and identification. - Vertex picking in retopo room has been improved. Detail www.3d-coat.com. + Informações

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I needed to rework a coupling for my new 3D printer. I was missing some tubbing that is used in the original design. I rework it so i don't need the tubbing. The video shows how to edit an object in Blender, Selecting vertices, deleting faces and adding new faces to the object, making sure it is also manifold.. + Informações

Full paper: www.elec.qmul.ac.uk Video event detection without explicitly using motion estimation or object tracking. Visualisation of the manifold of motion to detect unusual events in a low dimensional space. Contact: multimedia.signal.processing@gmail.com Bibtex: tinyurl.com. + Informações

From the Springer article: Spectral mesh deformation www.springerlink.com by: Rong, Guodong; Cao, Yan; Guo, Xiaohu Caption: Movie 1 17.5MB Journal: The Visual Computer Vol. 24 Issue 7 DOI: 10.1007/s00371-008-0260-x Published: 2008-07-02. + Informações

From this collection: members.cox.net I love repeating myself In nonsense delirium; I'm becoming a nonself Or an inaudible gulf In fleeting et ceterum. I love repeating myself Like a reiterant proof In a pandemonium; I'm becoming a nonself Dropped in a river: a leaf Outside of a museum. I love repeating myself As if I weren't just half Of an imperfect pantoum. I'm becoming a nonself In this composite of stuff Lacking cadence and rhythm. I love repeating myself; I'm becoming a nonself. When I am done talking about my Self And tune my ears so humbly to an other Whose music and whose mode I am subject As consequence of the Creator's object, I fault before the splendor of their art And celebrate my bound, reflected being. The magic of our talk and of our being Is far beyond the finish of a Self, Or so I have been taught by all the art: The increase, benefaction of an other That's placed within a material object And has our love and vanity as subject. The sighs of life to which I am subject Are revealed as the universal being Of suffering to which none may object; To weep is no affliction bound to Self, We apprehend our presence in an other And in so doing gladly we find art. With our imagination we may art A Universe where no one is subject To the hate and violence of an other; We may image in verse the well-being Of manifold vibrations of the Self And cherish our idealized object. To this only divisives may object And with their schism doctrine build an art That engenders a .... + Informações