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  • Nvidia: Solid Quarter Marred By Weak Guidance And High OpEx [View article]
    Yes, that is the point. NVDA's valuation today is much like days back in 2008 while the overall market has rocketed.
    Feb 14, 2013. 10:25 AM | 1 Like Like |Link to Comment
  • Nvidia: Solid Quarter Marred By Weak Guidance And High OpEx [View article]
    I once bought NVDA for $7.9 per share. Of course that was in Nov. 2008. And happily sold that chunk for more than $18 at the end of 2009 ( I really did not understand why at that time people would pay 16+ for this company) .
    Feb 14, 2013. 10:00 AM | Likes Like |Link to Comment
  • Axion Power Concentrator 208: Feb. 13: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    With current commercial available cathodes, electrolyte and shell, I just do not believe 300% energy density claim even if we could find an anode material weighting zero.

    from the link above:
    "Future research by the group will focus finding a new cathode material with a high capacity that will pair well with the porous silicon nanowires and/or porous silicon nanoparticles to create a completely redesigned battery."
    Feb 13, 2013. 10:32 PM | 4 Likes Like |Link to Comment
  • Axion Power Concentrator 207: Feb. 10: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    JRP3,
    "Musk often stutters. Words can't keep up with the speed of his brain."

    You should warn people before commenting this low. I was eating something and choked.
    Feb 12, 2013. 05:14 AM | 6 Likes Like |Link to Comment
  • Intel: Enough Of The Nonsense [View article]
    Another greate piece. Good Job!
    Feb 11, 2013. 04:59 AM | 11 Likes Like |Link to Comment
  • Axion Power Concentrator 207: Feb. 10: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    Bravo, Carlos!
    Feb 10, 2013. 08:38 AM | 3 Likes Like |Link to Comment
  • Axion Power Concentrator 206: Feb. 6: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    Many if not most Chinese people buy cars not for commute but for social recognition. Nothing makes them happier than a gas guzzling exotic brand masculine SUV in that regard.
    And a large percent of commuters do not have to pay their gas. Their companies cover that as a means of employee welfare and tax reduction.
    Tesla, if not an EV, should definitely be a hit in China.
    Those mini cars, except SMART from Daimler AG, are regretfully unpopular though a dozen of SMART copycats are readily available. The reason why is obvious to me.
    Feb 8, 2013. 03:17 AM | 5 Likes Like |Link to Comment
  • Axion Power Concentrator 206: Feb. 6: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    MHF is old school flooded lead acid battery plus carbon addictive. Exide is more willing to tout MHF solution probably because capex for MHF is substantially less compared to AGM. Many OEMs are willing to receive this kind of products as long as they could kick the can down the road.

    Good thing is Jim Bolch does not think JCI's solution very attractive.
    Feb 8, 2013. 12:42 AM | 5 Likes Like |Link to Comment
  • EPower Engine Systems; Exploring The Limits Of Hybrid Truck Efficiency [View instapost]
    Hi guys I am not worrying about their wiring a bit indeed. I just tried to show anything could go wrong with 300 amps even the wiring. The real picture of current in/out battery pack would be rectangle wave like with peak and bottom at positive/minus 300 amps and this kind of transition from +300 to -300 could happen in less than one second.

    As the diesel engine is the only real power source for the truck, I, as a dilettante, think predicting MPG is relatively simple. The number should be a little less than ( due to overhead and occasionally unfavorable SOC of the battery pack) a truck with "A 197 horsepower four cylinder John Deere turbo-diesel" towing 80k pounds cargo at 65 MPH on flat highway. All other parts of system are built to absorb extra power from vehicle decelerating and to provide HPs during accelerating, thus making the diesel engine believe himself running at 65 MPH on level highway all the time. That is my ignorant understanding of the system. Hope you guys could enlighten me as always. TIA.
    Feb 2, 2013. 06:05 PM | 5 Likes Like |Link to Comment
  • EPower Engine Systems; Exploring The Limits Of Hybrid Truck Efficiency [View instapost]
    Thanks John,
    An electrical system handling 600 volts 300 amps is a tremendous piece of work, very intimidating. No wonder those delays. Even the wires have to be carefully designed and thoroughly tested otherwise excessive heat may be generated caused by surge current due to skin effect, which may blow insulating coating of the wires away in seconds.
    Fortunately epower tech staff should already have extensive experience with such system. With the help from Axion power, they would make it though predicting timing may be extremely difficult.
    Feb 2, 2013. 10:32 AM | 3 Likes Like |Link to Comment
  • EPower Engine Systems; Exploring The Limits Of Hybrid Truck Efficiency [View instapost]
    John,
    Thanks for this instablog.
    One quick question after first-pass reading, how much kw power does the battery pack provide to help during acceleration?
    Feb 2, 2013. 02:44 AM | 3 Likes Like |Link to Comment
  • A Look Into The New And Improved Amazon.com Estimates [View article]
    Amazon experienced an outage of its main Amazon.com homepage that lasted for nearly one hour yesterday (http://tcrn.ch/12fbulL). Its business model seems not that impeccable after all.
    Feb 1, 2013. 10:26 AM | 1 Like Like |Link to Comment
  • Axion Power Concentrator 202: Jan. 24: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications Norfolk Southern [View instapost]
    John,
    the second 2011 should be 2012.
    Jan 28, 2013. 09:44 PM | 4 Likes Like |Link to Comment
  • Axion Power Concentrator 201: Jan. 22: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    Bang, we can not afford to lose you, therefore TG would cut a deal beyond 20 cents.
    Jan 24, 2013. 09:14 AM | 5 Likes Like |Link to Comment
  • Axion Power Concentrator 201: Jan. 22: Axion Power PbC Batteries Continue To Demonstrate Effectiveness For Railroad Applications [View instapost]
    NGS,
    While I was educated LiFePO4 to be the safest li-ion chemistry available, the BYD E6 taxi burning to ashes in China did equip iron phosphate cells ( http://bit.ly/GWUFfr ) . Though the company claimed the fire was caught by "electric arcs caused by the short-circuiting of high voltage lines of the high voltage distribution box ignited combustible material in the vehicle including the interior materials and part of the power batteries."
    "They also noted that the battery pack did not explode, and 75% of the single cell batteries did not catch on fire, and no flaws in the safety design of the vehicle were identified."

    It seems, 25% cells did catch on fire.
    Jan 23, 2013. 08:49 PM | 2 Likes Like |Link to Comment
COMMENTS STATS
195 Comments
113 Likes