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Steve Bosserman

'Biochemiresistor' sensor is fast, super-sensitive | KurzweilAI - 4 views

www.kurzweilai.net/sensor-is-fast-super-sensitive

sensor_technology biosensor contaminants biochemiresistor

shared by Steve Bosserman on 01 Jun 12 - No Cached
  • Francois Bergeron on 03 Jun 12
     
    this sensor is amazing ! very close to the vision we have for personal portable sensors: fast to immediate reading, detection of any compound...
Tiberius Brastaviceanu

xyz piezo micromanipulator (SENSORICA) - 0 views

sites.google.com/...xyz-piezo-micromanipulator

xyzpiezo_project

shared by Tiberius Brastaviceanu on 23 Nov 12 - No Cached
  • Tiberius Brastaviceanu on 23 Nov 12
     
    webpage for the xyz piezo positioner
Francois Bergeron

MyoStretcher - 0 views

www.ionoptix.com/...myostretcher

tools company cardiac myocytes scientific instruments

shared by Francois Bergeron on 24 Oct 12 - No Cached
  • IonOptix is proud to announce the release of the MyoStretcher, our new cardiomyocyte force measurement system.  Facilitated by the arrival of IonOptix MyoTak, our bio-compatible cell adhesive, we've developed the MyoStretcher with a focus on simplicity, ease-of-use and reliability.  The MyoStretcher includes all of the necessary components to stretch as well as record force in isolated myocytes.  In addition to the sensitive force transducer, motorized micro-manipulators and all component fittings, we also offer an optional piezo-electric translator for programmable stretching and a kit to facilitate attachment of glass rods to the MyoStretcher arms.
Tiberius Brastaviceanu

Places to Intervene in a System by Donella H. Meadows - developer.*, Developer Dot Star - 0 views

www.developerdotstar.com/...places_intervene_system.html

systems complexity management paper

shared by Tiberius Brastaviceanu on 20 Sep 11 - Cached
  • Folks who do systems analysis have a great belief in "leverage points."
  • where a small shift in one thing can produce big changes in everything.
  • backward intuition
  • ...15 more annotations...
  • "Places to Intervene in a System," followed by nine items: 9.  Numbers (subsidies, taxes, standards). 8.  Material stocks and flows. 7.  Regulating negative feedback loops. 6.  Driving positive feedback loops. 5.  Information flows. 4.  The rules of the system (incentives, punishment, constraints). 3.  The power of self-organization. 2.  The goals of the system. 1.  The mindset or paradigm out of which the goals, rules, feedback structure arise.
  • an invitation to think more broadly about system change.
  • Numbers ("parameters" in systems jargon) determine how much of a discrepancy turns which faucet how fast.
  • some of which are physically locked in, but most of which are popular intervention points.
  • Probably ninety-five percent of our attention goes to numbers, but there's not a lot of power in them.
  • Not that parameters aren't important—they can be, especially in the short term and to the individual who's standing directly in the flow. But they rarely change behavior. If the system is chronically stagnant, parameter changes rarely kick-start it. If it's wildly variable, they don't usually stabilize it. If it's growing out of control, they don't brake it.
  • Spending more on police doesn't make crime go away.
  • Numbers become leverage points when they go into ranges that kick off one of the items higher on this list.
  • Probably the most common kind of critical number is the length of delay in a feedback loop.
  • A delay in a feedback process is critical relative to rates of change (growth, fluctuation, decay) in the system state that the feedback loop is trying to control.
  • Delays that are too short cause overreaction, oscillations amplified by the jumpiness of the response. Delays that are too long cause damped, sustained, or exploding oscillations, depending on how much too long. At the extreme they cause chaos. Delays in a system with a threshold, a danger point, a range past which irreversible damage can occur, cause overshoot and collapse.
  • delays are not often easily changeable
  • It's usually easier to slow down the change rate (positive feedback loops, higher on this list), so feedback delays won't cause so much trouble
  • Most systems have evolved or are designed to stay out of sensitive parameter ranges. Mostly, the numbers are not worth the sweat put into them.
  • The plumbing structure, the stocks and flows and their physical arrangement, can have an enormous effect on how a system operates.
Tiberius Brastaviceanu

peer into the future - Insect wing flap sensor - 0 views

sites.google.com/...insect-wing-flap-sensor

projects

shared by Tiberius Brastaviceanu on 28 May 24 - No Cached
  • You might want to add some background, define the vision, mission, main objectives, strategy, priorities (you need to update), ...
  • This device can then be used
    • Tiberius Brastaviceanu
      Tiberius Brastaviceanu on 28 May 24
       
      This is really interesting ...
  • buzzing sounds of larger insects, but not of very small insects, since the variation in air pressure that their wings create falls below the sensitivity threshold of these types of sensors. One option for tiny insects, such as Drosophila, is to use an optical tachometer, which uses light to detect the flapping of wings.
  • ...1 more annotation...
  • hen insects fly around they buzz. One can use a convention
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