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August 11, 2004


Bob Wyman

Nova, you asked: "a few postings in my own blogs have a link in them and they aren't showing up yet."...

Sorry, we won't/can't "catch up" on links that were written in the past. PubSub.com implements a "prospective search" using a matching engine. Thus, we only see events that happen in the future. We only hold any particular entry for the few milliseconds that it takes to match against existing subscriptions. This is unlike a "retrospective search engine" that keeps a history of entries found and can re-inspect that history on demand. Since we've already read all the past entries on your site, and the entries on many of the sites of those who may have tried to get into the Channel Mob in the past, we can't match those entries again. However, we *will* catch any *new* links that are created in the future. Sorry about that...

You wrote: How long is the time delay for indexing?

Well, it depends on where you post your entry. For instance, if you post an item on LiveJournal, we'll typically find and match it within about 25 seconds. That's because we get an aggregate feed of blog updates from LiveJournal which is updated every 15 seconds. On the other hand, if you create an entry in a blog that pings us at xping.pubsub.com/ping or via blo.gs, ping-o-matic, etc., then the delay is likely to be on the order of a minute or two. Finally, if you write your entry in a blog that doesn't ping either us or one of the sites that forwards pings to us, then it can take a few hours to get an entry into our matching engine -- assuming that we know your blog exists. (Please visit http://pubsub.com/add-feed if you create a new blog that doesn't ping us.) Once an entry is in our system, it only takes a few milliseconds at most to match it against all the existing subscriptions. (for more on the speed at which we match see: http://bobwyman.pubsub.com/main/2004/06/hyperbole_numbe.html)

bob wyman

Nova Spivack

To Bob Wyman: Great, thanks Bob! Looks better. It still isn't catching everything though -- for example a few postings in my own blog have the link in them and they aren't showing up yet. How long is the time delay for indexing?

Bob Wyman

I think I've fixed the problem... MyStack is a distinct application from PubSub.com. It is basically a sample application that demonstrates what one can build on top of the kind of "prospective" matching engine that we provide at PubSub.com. Unfortunately, there were changes to some PubSub.com interfaces that I failed to propogate to the MyStack code. The result was that your Channel Mob subscription wasn't matching all the items that it should have matched. I've got MyStack caught up now and things should work much better in the future. Please accept my sincere apologies for this problem.

bob wyman

Bob Wyman


Sorry, but I didn't get the email you sent "last week." Anyway, we're connected now and I'm trying to figure out what might be the problem. Note: We completely replaced our hardware (i.e. every server, cabinet, etc.) on Sunday and that meant some downtime over the weekend. But, I think we should be running fine now. I'll take this to email for further discussion. Thanks for letting us know there might be a problem.

bob wyman

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Nova's Trip to Edge of Space

  • Stepsedgestratosphere
    In 1999 I flew to the edge of space with the Russian air force, with Space Adventures. I made it to an altitude of just under 100,000 feet and flew at Mach 3 in a Mig-25 piloted by one of Russia's best test-pilots. These pics were taken by Space Adventures from similar flights to mine. I didn't take digital stills -- I got the whole flight on digital video, which was featured on the Discovery Channel.

Nova & Friends, Training For Space...

  • Img021
    In 1999 I was invited to Russia as a guest of the Russian Space Agency to participate in zero-gravity training on an Ilyushin-76 parabolic flight training aircraft. It was really fun!!!! Among other people on that adventure were Peter Diamandis (founder of the X-Prize and Zero-G Corporation), Bijal Trivedi (a good friend of mine, science journalist), and "Lord British" (creator of the Ultima games). Here are some pictures from that trip...


People I Like

  • Peter F. Drucker
    Peter F. Drucker was my grandfather. He was one of my principal teachers and inspirations all my life. My many talks with him really got me interested in organizations and society. He had one of the most impressive minds I've ever encountered. He died in 2005 at age 95. Here is what I wrote about his death. His foundation is at http://www.pfdf.org/
  • Mayer Spivack
    Mayer Spivack is my father; he's a brilliant inventor, cognitive scientist, sculptor, designer and therapist. He also builds carbon fiber trimarans in his spare time, and studies animal intelligence. He is working on several theories related to the origins of violence and ways to prevent it, new treatments for learning disabilities, and new theories of cognition. He doesn't have a Web site yet, but I'm working on him...
  • Marin Spivack
    Marin Spivack is my brother. He is the one of the only western 20th generation lineage holders of the original Chen Family Tai Chi tradition in China. He's been practicing Tai Chi for about 6 to 10 hours a day for the last 10 years and is now one of the best and most qualified Tai Chi teachers in America. He just returned from 3 years in China studying privately with a direct descendant of the original Chen family that created Tai Chi. The styles that he teaches are mainly secret and are not known or taught in the USA. One thing is for sure, this is not your grandmother's Tai Chi: This is serious combat Tai Chi -- the original, authentic Tai Chi, not the "new age" form that is taught in the USA -- it's intense, physically-demanding, fast, powerful and extremely deadly. If you are serious about Tai Chi and want to learn the authentic style and applications, the way it was meant to be, you should study with my brother. He's located in Boston these days but also travels when invited to teach master classes.
  • Louise Freedman
    Louise specializes in art-restoration. She does really big projects like The Museum of Fine Arts in Boston, The Gardner Museum and Harvard University. She's also a psychotherapist and she's married to my dad. She likes really smart parrots and she knows how to navigate a large sailboat.
  • Kris Thorisson
    Kris has been working with me for years on the design of the Radar Networks software, a new platform for the Semantic Web. He has a PhD from the MIT Media Lab. He designs intelligent humanoids and virtual realities. He is from Iceland, which makes him pretty cool.
  • Kimberly Rubin
    Kim is my girlfriend and partner, and also a producer of 11 TV movies, and now an entrepreneur in the pet industry. She is passionate about animals. She has unusual compassion and a great sense of humor.
  • Kathleen Spivack
    Kathleen Spivack is my mother. She's a poet, novelist and creative writing teacher. She was a personal student of Robert Lowell and was in the same group of poets with Silvia Plath, Elizabeth Bishop and Anne Sexton. She coaches novelists, playwrites and poets in France and the USA. She teaches privately and her students, as well as being published, have won many of the top writing prizes.
  • Josh Kirschenbaum
    Josh is a visual effects whiz, director and generalist hacker in LA. We have been pals and collaborators since the 1980's. Josh is probably going to be the next Jim Cameron. He's also a really good writer.
  • Joey Tamer
    Joey is a long-time friend and advisor. She is an expert on high-tech strategic planning.
  • Jim Wissner
    Jim is among the most talented software developers I've ever worked with. He's a prolific Java coder and an expert on XML. He's the lead engineer for Radar Networks.
  • Jerry Michalski
    I have been friends with Jerry for many years; he's been advising Radar Networks on social software technology.
  • Chris Jones
    Chris is a long-time friend and now works with me in Radar Networks, as our director of user-experience. He's a genius level product designer, GUI designer, and product manager.
  • Bram Boroson
    Bram is an astrophysicist and college pal of mine. We spend hours and hours brainstorming about cellular automata simulations of the universe. He's one of the smartest people I ever met.
  • Bari Koral
    Bari Koral is a really talented singer songwriter. We co-write songs together sometimes. She's getting some buzz these days -- she recently opened for India Arie. She worked at EarthWeb many years ago. Now she tours almost all year long and she just had a hit in Europe. Check out her video, on her site.
  • Adam Cohen
    Adam Cohen is a long-term friend; we were roommates in college. He is a really talented composer and film-scorer. He doesn't have a Web site but I like him anyway! He's in Hollywood living the dream.
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