50 episodes

Guest speakers, researchers and University of California faculty explore physics to better understand and predict the world around us.

Physics (Video) UCTV

    • Natural Sciences

Guest speakers, researchers and University of California faculty explore physics to better understand and predict the world around us.

    • video
    Biomolecular Action Movies: Flash Imaging with X-ray Lasers

    Biomolecular Action Movies: Flash Imaging with X-ray Lasers

    Proteins are nature’s machines, performing tasks from transforming sunlight into useable energy to binding oxygen for transport through the body. These functions depend on structural arrangement of atoms within the protein, which was, until recently, only possible to measure statistically, in easily crystallized samples via conventional X-ray diffraction. In the past decade, X-ray Free Electron Lasers (XFELs), a new type of X-ray source, have begun to come online. Using ultra-bright, ultrafast X-ray pulses of the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory, this technology allows us to measure not only static pictures of protein structure but to record “molecular movies” of proteins in action. Series: "Field Trip at the Lab: Science on Saturday" [Science] [Show ID: 33432]

    • 53 min
    • video
    Laser-Plasma Accelerators: Riding the Wave to the Next Generation X-Ray Light Sources

    Laser-Plasma Accelerators: Riding the Wave to the Next Generation X-Ray Light Sources

    Particle accelerators have been revolutionizing discoveries in science, medicine, industry and national security for over a century. An estimated 30,000 particle accelerators are currently active around the world. In these machines, electromagnetic fields accelerate charged particles, such as electrons, protons, ions or positrons to velocities nearing the speed of light. Although their scientific appeal will remain evident for many decades, one limitation of the current generation of particle accelerators is their tremendous size, typically a mile long, and cost, which often limits access to the broader scientific community. Acceleration of electrons in plasmas, in particular in laser-driven plasmas, has been drawing considerable attention over the past decade. These laser wakefield accelerators promise to dramatically reduces the size of accelerators and revolutionize applications in medicine, industry, and basic sciences. Series: "Field Trip at the Lab: Science on Saturday" [Science] [Show ID: 33429]

    • 48 min
    • video
    Complexity and Robustness: How Biology Ecology and Technology Balance Tradeoffs in an Uncertain World

    Complexity and Robustness: How Biology Ecology and Technology Balance Tradeoffs in an Uncertain World

    Do complex systems exhibit fundamental properties? This talk looks at tradeoffs between robustness and fragility that occur in biological, ecological, and technological systems that are driven by design, evolution, or other sorting processes to high-performance states which are also tolerant to uncertainty in the environment and components. Series: "GRIT Talks" [Science] [Show ID: 32758]

    • 29 min
    • video
    Why Do Your Shoelaces Come Untied?

    Why Do Your Shoelaces Come Untied?

    UC Berkeley mechanical engineers have shown why your shoelaces keep coming untied. It’s a question that everyone asks themselves, often after stopping to retie their shoes, yet no one had investigated. The answer, the study suggests, is that a double whammy of stomping and whipping forces act like an invisible hand, loosening the knot and then tugging on the free ends of your laces until the whole thing unravels.
    Using a slow-motion camera and a series of experiments, the study shows that shoelace knot failure happens in a matter of seconds, triggered by a complex interaction of forces. The study is more than an example of science answering a seemingly obvious question. A better understanding of knot mechanics is needed for sharper insight into how knotted structures fail under a variety of forces. Series: "UC Berkeley News" [Science] [Show ID: 32685]

    • 1 min
    • video
    Lakshana Huddar Berkeley: How to Build an Advanced Nuclear Reactor in a University Laboratory

    Lakshana Huddar Berkeley: How to Build an Advanced Nuclear Reactor in a University Laboratory

    Lakshana Huddar, Berkeley: How to Build an Advanced Nuclear Reactor in a University Laboratory Series: "Women in Science" [Science] [Show ID: 31079]

    • 5 min
    • video
    Tianyu Liu Santa Cruz: Enhancing the Performance of Supercapacitors Through Facilitation of Ion Diffusion

    Tianyu Liu Santa Cruz: Enhancing the Performance of Supercapacitors Through Facilitation of Ion Diffusion

    Tianyu Liu, Santa Cruz: Enhancing the Performance of Supercapacitors Through Facilitation of Ion Diffusion Series: "Women in Science" [Science] [Show ID: 31080]

    • 5 min

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