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    Google Homepage ~ May 17, 2017

    Antikythera mechanism
    wikipedia.org
    Generally referred to as the first known analogue computer,[26] the quality and complexity of the mechanism's manufacture suggests it has undiscovered predecessors made during the Hellenistic period. Its construction relied upon theories of astronomy and mathematics developed by Greek astronomers, and is estimated to have been created around the late second century BCE. In 1974, Derek de Solla Price concluded from gear settings and inscriptions on the mechanism's faces that it was made about 87 BC and lost only a few years later. Jacques Cousteau and associates visited the wreck in 1976 and recovered coins dated to between 76 and 67 BC.



    A schematic representation of the gearing of the Antikythera Mechanism, including the 2012 published interpretation of existing gearing, gearing added to complete known functions, and proposed gearing to accomplish additional functions, namely true sun pointer and pointers for the five then-known planets, as proposed by Freeth and Jones, 2012. Based also upon similar drawing in the Freeth 2006 Supplement and Wright 2005, Epicycles Part 2. Proposed (as opposed to known from the artefact) gearing crosshatched.




    This reminds me of bicycle gearing, both internal planetary hubs and external derailleurs and gears. You can see were I might get my celestial mechanical fascination from, in relation to bicycles. Fascinating in deed!
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      CommentAuthorSigurd
    • CommentTimeJun 9th 2017
     
    WANTED: For the downtube on my Stumpy and in the style likeness of the "StumpJumper" logo below, a "TrumpDumper" decal set.


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      CommentAuthorPaul
    • CommentTimeJun 10th 2017
     
    Shady John:For everyone who has climbed Nate Harrison Grade:

    https://www.sandiegoreader.com/news/2017/jun/09/ticker-black-mountain-school-nate-harrison/?google_editors_picks=true


    A friend of ours did some archaeological excavations of Nate's home in grad school.
    • CommentAuthorShady John
    • CommentTimeJun 27th 2017
     
    Why we shouldn't complain about having to fix a flat:

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    The Tea Pursuit, which aimed to test one’s mettle while holding a cup and saucer on a moving bicycle…
    (Ah, the places you'll go with a bike share!)
    The Chap Olympiad

    Splendid group of eccentric Brits, the world’s best dressed, descend on Bedford Square Gardens for Britain’s most eccentric sporting event. A midsummer ceremony, celebrating the weird, wonderful and wacky. A day-long celebration of diversity, set to the backdrop of a traditional summer garden party with a roster of live entertainment including eleven Olympiad games. The Chap Olympiad is designed to reward panache rather than sporting prowess and the games require the minimum amount of physical exertion. Not since the days of Bee versus Pigeon Racing during the Victorian times have so many befuddled anarcho-dandies and gin-addled punks been gathered together under one parasol.

    The Chap Olympiad — A Very British Day Out

    (Seems quite the "tweedy" event!)
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      CommentAuthorbikingbill
    • CommentTimeJul 31st 2017
     
    Riding the Burke-Gilman trail today ...

    Burke-Gilman trail
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      CommentAuthorbikingbill
    • CommentTimeOct 6th 2017
     
    I often travel by a combo of train+bike. Today Oceanside to UCLA. Two train trips, two bike rides to get there.

    Wish there was a navigation app that supported that sort of thing.
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      CommentAuthorbikingbill
    • CommentTimeOct 8th 2017 edited
     
    Shady John:Google Maps? Choose the "transit" option:

    https://www.google.com/maps/dir/Oceanside+Transit+Center,+South+Tremont+Street,+Oceanside,+CA/University+of+California,+Los+Angeles,+Los+Angeles,+CA+90095/@33.6452239,-118.4758115,9z/data=!3m1!4b1!4m18!4m17!1m5!1m1!1s0x80dc6e3a306243af:0x39d056e74bd8bf5!2m2!1d-117.3792197!2d33.1929342!1m5!1m1!1s0x80c2bc85f05c0f65:0x25a993585c134837!2m2!1d-118.4451811!2d34.068921!2m3!6e0!7e2!8j1507539600!3e3


    It doesn't support mixed mode.

    By mixed mode I mean this:

    Oceanside to UCLA.

    Amtrak->2 mile bike ride to the Metro Exposition Line->Metro to Westwood->3 mile bike ride to UCLA.

    It won't plan that route. You have to do it manually.

    Oh, FYI ... track incident on the LA->Orange County line. The train home was delayed by over 5 hours. I got home at 3:30AM.
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    VC celebrates return of historic “Stars” road sign
    Robert Lerner, VC Historian November 13, 2017 valleycenter.com
    Seventy years ago this month, in November 1947, crowds braved cold and rain as they stood in awe as a 40-ton tractor crawled through the streets of Valley Center hauling a 200-inch telescope mirror toward a new observatory atop Palomar Mountain.

    To mark the occasion, the street known today as Valley Center Road (originally Rincon Road) was renamed “Highway to the Stars via Valley Center” and signs with that name were posted from the Escondido city limit to the top of Palomar Mountain.
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    Valley Center looks to regain its star quality
    Logan Jenkins January 21, 2017 sandiegouniontribune.com
    In 1928, George Ellery Hale, the founder of the California Institute of Technology in Pasadena, secured funding for his visionary project from the Rockefeller Foundation: A 200-inch telescope that would dwarf any other in the world, an endeavor that many science historians refer to as the “moon shot” of the ‘30s and ‘40s.

    The problem of getting the $600,000 mirror from Caltech to its home atop Palomar was solved in the mid-1930s with the construction of a winding mountain road eventually dubbed the “Highway to the Stars.”
    “Safely completing a ticklish 160-mile trip by trailer from Pasadena, Palomar Observatory’s 200-inch mirror arrived here late this morning — inching over the last miles of twisting mountain road in heavy mist, bursts of hail and flurries of sleet.

    “Tonight, man’s most ambitious astronomical undertaking — to peer a billion light-years into space from this mile-high mountain 64 miles northeast of San Diego — is only a step from fulfillment.”
    VCHistory.org
    MAP Image
    MAP Google


    Smorg Cycle
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    22 December 2017: Friday evening ~ 5:30 PM
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      CommentAuthorbikingbill
    • CommentTimeDec 27th 2017 edited
     
    Fellow rider made an astute observation on a possible reason why I don't get harassed by drivers:

    I posted this pic of my bike on the Coronado Ferry on Facebook (did a 27+ mile loop):


    (The recumbent with the big yellow cargo box)

    And a he made this cogent observation:

    Your Bacchetta Giro 26 towers over those road bikes and makes them look like kid's bikes. I can tell you if I were a driver with a could care less attitude towards bicycles, I'd still instinctively give your bike a much wider berth as that tail box looks big and heavy like something that could scrape up the side of the car if passing too close.

    Maybe so.

    That box, by the way, is folded from a single piece of corrugated plastic, is supported by tension alone (there's no frame), is extraordinarily light, attaches and detaches in seconds, and the sole structural element is a thin piece of plywood at the front.

    Twenty years of refinement in that design.
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    BAD TIDINGS: La Jolla flooding circa 2070
    Corey Levitan December 12, 2017 lajollalight.com

    San Diego, CA
    King Tides Monday, January 1st, 2018:
    High Tide 7:52am 7.5'
    Low Tide 2:58pm -1.9' (Good afternoon low tide beach riding!)

    King Tides Tuesday, January 2nd, 2018:
    High Tide 8:38am 7.5'
    Low Tide 3:44pm - 2.0' (Good afternoon beach riding!)

    King Tides in December 2015. Early morning in Mission Bay near the Catamaran Hotel.





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    SkyandTelescope.com
    Saturday, February 3, 2018
    After it’s good and dark, look due east, not very high, for twinkly Regulus. Extending upper left from it is the Sickle of Leo, a backward question mark. "Leo announces spring," goes an old saying. Actually, Leo showing up in the evening announces the cold, messy back half of winter. Come spring, Leo will already be high up in the east.
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    Rescheduled for Wednesday February 21, 2018 at 6:17am
    Let's hope the weather will have cleared by then.


    It’s Not The Apocalypse, It’s Another SpaceX Rocket Launch
    KPBS News February 16, 2018 kpbs.org
    SpaceX is launching a rocket Sunday from the Vandenberg Air Force Base near Santa Barbara. The Falcon 9 is scheduled to lift off at 6:16 a.m. Liftoff occurs 29 minutes before Vandenberg AFB sunrise. This means the exhaust plume will probably be illuminated by the sun when the vehicle reaches high altitude. According to the Spacearchive.info, Falcon 9’s bright orange flame should be visible as far away as San Luis Obispo and Santa Monica. The Falcon 9’s contrail and exhaust plume could be visible from San Francisco to Baja California.

    This early morning launch will have the sun at our backs as we look out, over the Pacific Ocean, into dark skies. We might not see the bright orange flame but as the rocket transitions from lower to higher altitude, the contrail and exhaust plume (white) will transition from earth's shadow into fully illuminated sunlight. That's when the exhaust will really become apparent. Also, as the rocket gets higher and higher, the exhaust plume expands very dramatically, getting much bigger. Be sure to watch for the first stage separation, retro-burn and return to landing off the SoCal coast. Coolamundo!