Science Nation - Dragonflies in Motion

submitted by: nsf
Next time you see a dragonfly, try to watch it catch its next meal on the go. Good luck! "Unless we film it in high speed, we can't see whether it caught the prey, but when it gets back to its perch, if we see it chewing, we know that it was successful," says Stacey Combes a biomechanist at Harvard University. With support from the National Science Foundation, she and her team are using high speed cameras to help them study how dragonflies pull off complicated aerial feats that include...

Revolutionary Advancement in Membrane Filtration Sample Preparation for Biotech Industry

submitted by: putnamr2
Photonic BioSystems, Inc. unveils game-changing microbiological testing technology. The versatile, enclosed filtration cartridge-based sample preparation technique is expected to change the paradigm of membrane filtration sample testing. Video Contents: 0:00 Filter system design explained 1:50 How the filtration system works: exemplary sample processing 4:40 Small volume samples 5:55 The filter system does what In-line filter cartridges cannot do 7:20 Variations on the...

A New Electro-Optic Waveguide Architecture and the Unprecedented Devices It Enables

submitted by: icamvid

Scott Davis gives a talk at the LC2CAM conference about a new and potent method to satisfy the long-standing need to actively control light.

The map slide and navigation hyperlinks in PowerPoint / Keynote

submitted by: jllebrun

In large presentations, a graphical map slide and invisible hyperlinks help the audience keep track of progress while letting the presenters follow either a preset or a spontaneous path through their slides. Map slide and hyperlinks allow presenters to keep to time and to respond immediately to perceived audience needs.

Role of the Neural Crest in Vertebrate Development and Evolution: Part 3: The Molecular Control of the Neural Crest Contribution to Craniofacial and Brain Development (36:10)

submitted by: video_collector
Further studies have shown that the NC cells which participate in facial skeletogenesis correspond to the anteriormost region of the body axis where the genes of the Hox cluster are not expressed. If the forced expression of Hoxa2, Hoxa3 and Hoxb4 (the most anteriorly expressed Hox genes) is induced in this part of the neural fold, brain development is deeply affected with anencephaly and no skeletogenesis takes place in the face which fails to develop. This phenotype is reproduced when the...

Epigenomics of Cancer - Prof. Wei Li (Part 1, 2009)

submitted by: ralanharris

Prof. Wei Li lectures on studies of transcription factor binding sites and histone modifications using ChIP-chip and Chip-seq assays. Part of the Computer Aided Discovery Methods 2009 course offered at Baylor College of Medicine.

Gene Expression Computational Lab - Chris Miller

submitted by: ralanharris

An introduction to computational methods for analyzing gene expression data by Chris Miller. This was presented as a lab within the Computer Aided Discovery Methods course offered within the Graduate Program at Baylor College of Medicine.

Adhesion, Signaling and Cancer by Mary C. Beckerle, July 2007 - Part 1: Understanding Cancer From Its Beginnings (36:04)

submitted by: video_collector
Cell-substratum adhesion is mediated by integrins, a family of transmembrane, heterodimeric, extracellular matrix receptors that are concentrated at focal adhesions. Integin engagement influences a variety of signaling pathways and regulates cell behaviors including motility, proliferation, and survival. Disturbance of normal integrin function is associated with a variety of pathologic conditions including cancer. In the first segment of my seminar, I provide a broad overview of the cancer...

Robust source-seeking hybrid controllers for nonholonomic vehicles (experiment)

submitted by: mayhew

This video shows an experiment involving a mobile robot, an IR-camera vision system, and a wireless network. The robot queries the vision system for position information. The robot uses this position information to simulate a potential function in its environment. The hybrid controller uses these measurements in a coordination of vehicle steering and an optimization algorithm to drive the vehicle to the minimum of the function (shown as a blue 'x').