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Tiberius Brastaviceanu

Open Source Completely 3-D Printable Centrifuge - Appropedia, the sustainability wiki - 0 views

www.appropedia.org/etely_3-D_Printable_Centrifuge

open science open hardware OSH catalog

shared by Tiberius Brastaviceanu on 10 Oct 23 - No Cached
  • Tiberius Brastaviceanu on 10 Oct 23
     
    "Centrifuges are commonly required devices in medical diagnostics facilities as well as scientific laboratories. Although there are commercial and open source centrifuges, the costs of the former and the required electricity to operate the latter limit accessibility in resource-constrained settings. There is a need for low-cost, human-powered, verified, and reliable lab-scale centrifuges. This study provides the designs for a low-cost 100% 3-D printed centrifuge, which can be fabricated on any low-cost RepRap-class (self-replicating rapid prototyper) fused filament fabrication (FFF)- or fused particle fabrication (FPF)-based 3-D printer. In addition, validation procedures are provided using a web camera and free and open source software. This paper provides the complete open source plans, including instructions for the fabrication and operation of a hand-powered centrifuge. This study successfully tested and validated the instrument, which can be operated anywhere in the world with no electricity inputs, obtaining a radial velocity of over 1750 rpm and over 50 N of relative centrifugal force. Using commercial filament, the instrument costs about U.S. $25, which is less than half of all commercially available systems. However, the costs can be dropped further using recycled plastics on open source systems for over 99% savings. The results are discussed in the context of resource-constrained medical and scientific facilities."
Francois Bergeron

Robot's Gentle Touch Aids Delicate Cancer Surgery - 0 views

www.sciencedaily.com/...090821135017.htm

robot touch aids cancer surgery

shared by Francois Bergeron on 25 Apr 12 - No Cached
  • Surgeons have developed new minimally invasive surgery (MIS) techniques and instruments so that procedures that would previously have required a large incision can now be performed through a tiny 10mm cut.
  • University of Western Ontario and Canadian Surgical Technologies and Advanced Robotics (CSTAR) in London, Ontario
  • The researchers used a torque sensor to measure the force of the palpations.
  • ...2 more annotations...
  • Using tactile MIS sensing instruments under robotic control reduces the maximum force applied to the tissue by over 35% compared to a human controlling the same instrument. Accuracy in detecting the tumours was also far greater with the robot - between 59 and 90% depending on the robot control method used for palpation.
  • If developed further, the authors suggest that this type of instrument would particularly benefit surgeons performing lung tumour resection, where tissue often shifts significantly.
Tiberius Brastaviceanu

The commons law project: A vision of green governance - 0 views

blog.p2pfoundation.net/...26

commons law project governance legal David Bollier Michel Bauwens

shared by Tiberius Brastaviceanu on 27 May 12 - No Cached
  • “commons law” (not to be confused with common law)
  • Commons law consists of those social practices, cultural traditions and specific bodies of formal law that recognize the rights of commoners to manage their own resources
  • Ever since the rise of the nation-state and especially industrialized markets, however, commons law has been marginalized if not eclipsed by contemporary forms of market-based law
  • ...19 more annotations...
  • individual property rights and market exchange have been elevated over most everything else, and this has only eroded the rights of commoners,
  • reframe the very notion of “the economy” to incorporate non-market sharing and collaboration.
  • we had concluded that incremental efforts to expand human rights and environmental protection within the framework of the State/Market duopoly were simply not going to achieve much
  • the existing system of regulation and international treaties has been a horrendous failure over the past forty years. Neoliberal economics has corrupted and compromised law and regulation, slashing away at responsible stewardship of our shared inheritance while hastening a steady decline of the world’s ecosystems
  • We concluded that new forms of ecological governance that respect human rights, draw upon commons models and reframe our understanding of economic value, hold great promise
  • An economics and supporting civic polity that valorizes growth and material development as the precondition for virtually everything else is ultimately a dead end—literally.
  • Achieving a clean, healthy and ecologically balanced environment requires that we cultivate a practical governance paradigm based on, first, a logic of respect for nature, sufficiency, interdependence, shared responsibility and fairness among all human beings; and, second, an ethic of integrated global and local citizenship that insists upon transparency and accountability in all activities affecting the integrity of the environment.
  • We believe that commons- and rights-based ecological governance—green governance—can fulfill this logic and ethic. Properly done, it can move us beyond the neoliberal State and Market alliance—what we call the ‘State/Market’—which is chiefly responsible for the current, failed paradigm of ecological governance.
  • The basic problem is that the price system, seen as the ultimate governance mechanism of our polity, falls short in its ability to represent notions of value that are subtle, qualitative, long-term and complicated.
  • These are, however, precisely the attributes of natural systems.
  • Exchange value is the primary if not the exclusive concern.
  • anything that does not have a price and exists ‘outside’ the market is regarded (for the purposes of policy-making) as having subordinate or no value.
  • industry lobbies have captured if not corrupted the legislative process
  • regulation has become ever more insulated from citizen influence and accountability as scientific expertise and technical proceduralism have come to be more and more the exclusive determinants of who may credibly participate in the process
  • we have reached the limits of leadership and innovation within existing institutions and policy structures
  • it will not be an easy task to make the transition from State/Market ecological governance to commons- and rights-based ecological governance
  • It requires that we enlarge our understanding of ‘value’ in economic thought to account for nature and social well-being; that we expand our sense of human rights and how they can serve strategic as well as moral purposes; that we liberate ourselves from the limitations of State-centric models of legal process; and that we honor the power of non-market participation, local context and social diversity in structuring economic activity and addressing environmental problems.
  • articulate and foster a coherent new paradigm
  • deficiencies of centralized governments (corruption, lack of transparency, rigidity, a marginalized citizenry)
Francois Bergeron

A miniature microsurgical instrument tip force sensor for enhanced force feedback durin... - 3 views

docs.google.com/viewer

shared by Francois Bergeron on 23 Apr 11 - No Cached
Luciano Silva liked it
    • Francois Bergeron
      Francois Bergeron on 26 Apr 11
       
      that's why a sensor is required !
    • Tiberius Brastaviceanu
      Tiberius Brastaviceanu on 26 Apr 11
       
      Right man! It's interesting to see that these instruments are also needed to almost all robot-assisted surgery procedures. So it's more than just brain manual surgery.   
  • Tiberius Brastaviceanu on 23 Apr 11
     
    A Miniature Microsurgical Instrument Tip Force Sensor for Enhanced Force Feedback During Robot-Assisted Manipulation
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