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Dr. Dorit Donoviel, Dr. Eugene de Juan, Jr., Sunday, 11-23-14 November 24, 2014

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Dr. Dorit Donoviel, Dr. Eugene de Juan, Jr., Sunday, 11-23-14

http://archived.thespaceshow.com/shows/2361-BWB-2014-11-23.mp3

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Guests:  Dr. Dorit Donoviel, Dr. Eugene, de Juan, Jr.  Topics:  Microgravity effects on optic nerve, NSRBI Vision for Mars Challenge, vision issues for long duration spaceflight.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See http://www.onegiantleapfoundation.org/amazon.htm.  For those listening to archives using live365.com and rating the programs, please email me as to why you assign a specific rating to the show. This will help me bring better programming to the audience.

We welcomed our guests Dr. Dorit Donoviel & Dr. Eugene de Juan, Jr. to discuss the National Space Biomedical Research Institute (NSBRI) “Vision for Mars Challenge: A Unique Opportunity for Ophthalmology Companies.”  Read about this project at http://www.nsbri.org/newsflash/indivArticle.asp?id=454&articleID=212.  For additional information on the grants, visit http://www.smartcap.org.  I would also like to thank Kacey White for her hard work with both guests and TSS in making this program possible.  During the first segment of our 97 minute discussion, Dr. Donoviel started us off with background information for the Vision for Mars Challenge, then Dr. de Juan discussed the nature of the eye problems and the effects of low gravity on the optic nerve.  As you will hear from our guests, the Vision for Mars Challenge will award to small companies a grant of $100,000 to “to help identify and advance medical technologies for ocular health in space through collaboration and funding support.”  After this introductory part of our discussion, our guests went into detail about the medical issues relating to optic nerve changes, pressures, fluid balance and more and what this does to vision.  Our guests were asked how these vision issues might impact a crew on Mars or on the way to Mars but unfortunately not much information is known at this time. Also, we do not know the needed level of gravity to offset the optic nerve, fluid and pressure changes.  Our guests mentioned the upcoming year long crew visit to the ISS and that eye issues will be monitored so that accurate data on vision problems can be collected.  Dr. de Juan did go into many of the medical issues contributing to the vision problem including intraocular pressure and fluid balances.  In addition, we spoke about possible countermeasures.  Both artificial gravity with a short arm centrifuge and mechanical intervention via a certain type of pressure garment were discussed.  Medical intervention was also discussed, then BJohn suggested spinning the spaceship would be more cost effective that other types of countermeasures.  Our guests disagreed, saying medical countermeasures would be designed for patients on Earth as well as astronauts so the market size of potential beneficiaries worldwide would be huge as compared to just a handful of astronauts on a spinning spaceship.  Engineering problems were also cited as a severe cost driver in terms of creating artificial gravity for the crew.  Marshall called to ask about Lasik surgery.  Our guests were then asked about gender & other differences.  Don’t miss these discussions.

In the second segment, Dr. Doug was our first caller.  Doug had multiple questions as usual but first he wanted to know if astronauts could be selected for the longer space missions who had a lengthy stay on the ISS and did not show optic nerve changes or adverse effects.  Our guest thought this would be impractical given around 70% of all astronauts show some vision impact from being in space.  Prisms were talked about as part of mitigation in the form glasses with a variable prescription.  We talked about focus issues in space and on a submarine given my comments about wearing prisms glasses.  Doug’s additional questions dealt with doing a lumbar puncture in space as well as GCRs.  Doug and other listeners via email asked our guests if the vision problems were a show stopper for long duration spaceflight missions.  Don’t miss what Dorit & Gene had to say about this.  Near the end of the program, we talked about the impact of space medicine research on Earth medical problems.  The resulting discussion was most interesting, especially given the examples cited by Dorit via ultrasound in space.  The subject of aerospace medicine medical school programs came up and here Dorit explained the innovative program at Baylor’s Center for Space Medicine.

Please post your comments/questions on TSS blog.  You can contact our guests through me.

The John Batchelor Show Hotel Mars, Wednesday, 7-2-14 July 3, 2014

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The John Batchelor Show Hotel Mars, Wednesday, 7-2-14

http://archived.thespaceshow.com/shows/2273-BWB-2014-07-02.mp3

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Guests: John Batchelor, Dr. Frank Martin, Dr. David Livingston.  Topics:  The NRC study “Pathways to Exploration: Rationales and Approaches for a U.S. Program of Human Space Exploration.” You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog. Comments, questions, and any discussion must be relevant and applicable to Space Show programming. Written Transcripts of Space Show programs are not permitted without prior written consent from The Space Show (even if for personal use) & are a violation of the Space Show copyright. We do not permit the commercial use of any Space Show program or part thereof, nor do we permit Space Show programs to be edited, placed on YouTube, or other private channels & websites. Space Show programs can be quoted in news articles, papers, academic & research work but must be cited or referenced in the proper citation format. Contact Dr. Livingston for questions about our copyright and trademark policies which we do enforce.This program is archived on The Space Show website, podcasting, and blog sites with permission from John Batchelor. Please visit the John Batchelor Show website for more information about this fine program, www.johnbatchelorshow.com.  Remember, your Amazon Purchases Can Help Support The Space Show/OGLF (www.onegiantleapfoundation.org/amazon.htm).  For those of you listening to archives on live365.com & rating the programs, please email me the reasons for your rating.  This will definitely help improve Space Show programming. Thank you.

We welcomed to Hotel Mars Dr. Frank Martin who was part of the study team for the National Research Council’s “Pathways to Exploration: Rationales and Approaches for a U.S. Program of Human Space Exploration” study.  You can download a free copy of the 280 page report as a pdf document at www.nap.edu/catalog.php?record_id=18801.  Dr. Martin introduced us to the report which focused on the goal of human spaceflight to Mars.  During our Hotel Mars summary of the report and related issues, we discussed the problems with constrained budgets, the risks it poses for our human spaceflight program, and the leadership vacuum it creates in the U.S.  human spaceflight program.  John asked Dr. Martin about radiation, the use of the ISS, using the Moon to facilitate Mars, and the incremental approach to going to Mars.  At the end of the 11.5 minute segment, Dr. Martin was asked about the private sector doing the Mars human spaceflight mission, particularly SpaceX.

Please post any comments/questions you might have on The Space Show blog.  You can contact any of  us through drspace@thespaceshow.com.

Dr. Jason Cassibry, Friday, 12-20-13 December 21, 2013

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Dr. Jason Cassibry, Friday, 12-20-13

http://archived.thespaceshow.com/shows/2147-BWB-2013-12-20.mp3

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Guest:  Dr. Jason Cassibry.   Topics:  Nuclear propulsion including fission, fusion, reactors in space and more.  Please direct all comments and questions regarding Space Show programs/guest(s) to the Space Show blog, https://thespaceshow.wordpress.com.  Comments and questions should be relevant to the specific Space Show program. Written Transcripts of Space Show programs are a violation of our copyright and are not permitted without prior written consent, even if for your own use. We do not permit the commercial use of Space Show programs or any part thereof, nor do we permit editing, YouTube clips, or clips placed on other private channels & websites. Space Show programs can be quoted, but the quote must be cited or referenced using the proper citation format. Contact The Space Show for further information. In addition, please remember that your Amazon purchases can help support The Space Show/OGLF. See www.onegiantleapfoundation.org/amazon.htm.

We welcomed back to the show Dr. Jason Cassibry from the University of Alabama Huntsville to discuss nuclear propulsion of all kinds.  In our initial segment of this 1 hour 30 minute discussion, I first asked Dr. Cassibry about a fusion drive project as reported at www.youtube.com/watch?v=r-jlv1x3ov4.  Dr. Cassibry spoke about the work going on at the University of Washington which was mentioned in the fusion drive video above.  We then talked about transit times to and from Mars and the differences with chemical propulsion, nuclear thermal, and then fusion.  During this discussion, Jason also described the differences in nuclear thermal and nuclear electric propulsion.  A related issue we discussed dealt with the nuclear regulatory environment.  We talked about the nuclear climate, protests, and how best to overcome such protests.  Doug called asking about timelines and said it was moving at such a slow pace, for his projects that he thinks about, he dismisses nuclear propulsion, instead opting for analysis and mission planning using chemical rockets though many are not much further along than a Power Point at this point in time.  Doug also thought it might be easier to do nuclear propulsion by partnering with Russia as they might be easier on the regulatory environment than the U.S.  Our caller asked about ion propulsion and thrusters as well as thermal protection needs.

In the second segment, Jerry emailed about nuclear propulsion in other countries plus more about possible consumer protests.  Ben asked if we could substantially improve chemical rockets and I inquired as to why the recent nuclear program Prometheus was killed.  VASIMIR was next brought up for discussion.  I asked Jason about nuclear accidents in space or on Mars and would they be as destructive as nuclear reactor accidents here on Earth.  Jason provided a most interesting answer saying he thought nuclear reactors in space would be accident proof!  Christine in Dallas suggested we need a better story for more support for nuclear propulsion.  Don’t miss the reply offered by Dr. Cassibry. Near the end of our discussion, I asked our guest about suborbital propulsion.

Please post your comments/questions on TSS blog above.  You can email our guest through me.