About the battery: each cell in a hybrid should be individually controlled, and a dead cell will only give you a drop in capacity (its capacity is offline), it should not otherwise decrease the performance of the entire battery (or other cells)! In a hybrid, each cell has a mosfet that can bypass it -- it's used for cell balancing during both charge and discharge cycles, and for cell isolation in case of a cell failure. Failed cells are designed for, and a normall occurrence in a battery pack with lots of cycles. There is no way a dead cell (or a bunch of them!) would cause "under utilization" of other cells -- that's some crazy talk as far as I'm concerned.
That's quite informative. MOSFET Rds losses aren't all that relevant in a hybrid car. In a modern, compact, high-frequency inverter the Rds losses are probably on par with gate capacitance losses, even in resonant gate designs. Inverters, at lest in Ph.D. theses, get optimized to hell and back, a couple times, it seems.
You've missed the point. What's worthwile for them may not be worthwhile for you. People get satisfaction from a whole lot of things, there's nothing universally worthwhile to do on this world!
I don't know about what's available in the U.S., but perhaps going to Canada would be an alternative? Vancouver is a very nice city, and there's Science AL!VE program at Simon Fraser University, run by student volunteers. I've heard some praises of it.
That gave me a chuckle. Fluent is one of those companies that thinks adhering to a scammer-like front page template gives them a reason to be proud. FundUtopia, ha ha.
Modern equivalents of "old" chips behave just like that. Believe it or not, 6502 is still made, in CMOS, as 65C02. It runs down to 1.8V -- at that voltage it has 0.5mA/MHz current consumption, and 1uA static leakage. It will run from those lemons all right, assuming you hook it up to equally low-current peripherals. All you really need is a static ram chip, and some glue debounce logic for the switches.
15MPH crash?? Informative? Of course there will be oscillations, you integrate them to see what was the change in speed (not absolute speed!) during the period the recording was taken in. Those oscillations are mostly immaterial, you can put a low pass filter to get a more accurate representation of what the driver was subjected into. His bones were not bolted to the chassis, W2^10. The recording is not long enough, in this case, to capture entire delta-v from initial impact to the car coming to a rest.
Should have read the fine report:) The retained data is a rather short freeze-frame data that includes a couple hundred data points at most. It's there mostly for the manufacturer of the restraint system controller to be able to cover their asses in case the customer, say, claims that the airbags deployed for no reason. It's not designed to be a real crash recorder. For those, you'd want decent inertial reference (6 DOF), audio recording, survivable memory module, etc.
It's the deceleration that kills, not the speed. If you'd run at 130mph into a wall, the car may as well be your coffin. If you'd run into a field with shrubs/bushes, and not overturn, you'll be fine.
A "Video Wall" controller of this resolution is pretty much a Parallax Propeller attached to some serial network that slowly feeds the data to all of them. You could probably make it for $20 in small quantity, and the board with its male DB15 connector would plug directly into the PC input of the monitor.
I think you must have a bad battery. My wife's neanderthal Motorola worked for 1-2 days until I changed the battery, now it lasts a week+. Even when new, the battery lasted only 3 days.
I vote with my wallet, and I'm vocal about it every time a distributor/vendor calls to complain we stopped ordering from them. I then tell them that I have no time to fax an order over, or even to reenter it every time I need 200 line items to replenish production stock/kits. A few distributors allow uploads of CSV or XLS files, and that works reasonably well, even though you still have to screen-scrape the entire process to extract the final outcome (what's in stock, what is the pricing, etc). It gets real boring real quick when you have to manually copy a 200 line PO to your ERP system...
I just happnened to visit the harbour seaport on a walk. Any large city with lots of water and lots of population spread out on neighboring islands will probably have a company offering seaplane rides. It's fun as hell, even if you really need to use those hearing protectors if you'd want to do it frequently.
Oh, if only column type was a problem. If they are a real enterprise with real history and real design, the SQL probably looks more like this:
DELETE from ENTERPRISE_VAL v001, ENTERPRISE_VAL v002, ENTERPRISE_LOOKUP lk001 where v001.kludge_15 != 44 and v001.col='fee' and v001.val = '2' and v001.k018 = v002.k081 and v002.col = 'type_post_2010' and v002.val = 'card' and lk001.p3 != v001.lp3 and lk001.p4 != v002.lp8;
Hmm, so they, for once took customer feedback seriously? What the heck just happened? A galaxy must have just imploded somewhere (from our vantage point, that is).
If you're taking a jet -- true. If you're taking a small plane, then you will pretty much always beat the car over 400 miles. Just recently I flew on a single engine seaplane in Canada, and the whole procedure, without planning anything in advance, had an overhead of 5 minutes from walking in without even knowing what options are there to being on my way to the plane. We were airborne within 7 minutes of me signing the credit card slip. I know that such services are not available everywhere, but on a short notice the price is quite competitive with any legacy carrier. And they will fly you very close to your destination if there happens to be water nearby (or even a small airfield open to general aviation).
Slashdot Mirror
ISA slots are hardly defunct. Ever heard of PC/104? Alive and well is what they are, with new products being still developed all righty.
About the battery: each cell in a hybrid should be individually controlled, and a dead cell will only give you a drop in capacity (its capacity is offline), it should not otherwise decrease the performance of the entire battery (or other cells)! In a hybrid, each cell has a mosfet that can bypass it -- it's used for cell balancing during both charge and discharge cycles, and for cell isolation in case of a cell failure. Failed cells are designed for, and a normall occurrence in a battery pack with lots of cycles. There is no way a dead cell (or a bunch of them!) would cause "under utilization" of other cells -- that's some crazy talk as far as I'm concerned.
That's quite informative. MOSFET Rds losses aren't all that relevant in a hybrid car. In a modern, compact, high-frequency inverter the Rds losses are probably on par with gate capacitance losses, even in resonant gate designs. Inverters, at lest in Ph.D. theses, get optimized to hell and back, a couple times, it seems.
You've missed the point. What's worthwile for them may not be worthwhile for you. People get satisfaction from a whole lot of things, there's nothing universally worthwhile to do on this world!
I don't know about what's available in the U.S., but perhaps going to Canada would be an alternative? Vancouver is a very nice city, and there's Science AL!VE program at Simon Fraser University, run by student volunteers. I've heard some praises of it.
That gave me a chuckle. Fluent is one of those companies that thinks adhering to a scammer-like front page template gives them a reason to be proud. FundUtopia, ha ha.
Modern equivalents of "old" chips behave just like that. Believe it or not, 6502 is still made, in CMOS, as 65C02. It runs down to 1.8V -- at that voltage it has 0.5mA/MHz current consumption, and 1uA static leakage. It will run from those lemons all right, assuming you hook it up to equally low-current peripherals. All you really need is a static ram chip, and some glue debounce logic for the switches.
I don't think any of those use ultrasound. It doesn't really work all that well over the distances in question (dozens of metres).
Given only Acceleration(t), you can integrate it into Velocity(t) + C where C is unknown because no initial velocity is given.
And that's what one should know pretty well upon leaving high school, too.
15MPH crash?? Informative? Of course there will be oscillations, you integrate them to see what was the change in speed (not absolute speed!) during the period the recording was taken in. Those oscillations are mostly immaterial, you can put a low pass filter to get a more accurate representation of what the driver was subjected into. His bones were not bolted to the chassis, W2^10. The recording is not long enough, in this case, to capture entire delta-v from initial impact to the car coming to a rest.
Uh-huh, much good a know-it-all brain does you when you're asleep...
Should have read the fine report :) The retained data is a rather short freeze-frame data that includes a couple hundred data points at most. It's there mostly for the manufacturer of the restraint system controller to be able to cover their asses in case the customer, say, claims that the airbags deployed for no reason. It's not designed to be a real crash recorder. For those, you'd want decent inertial reference (6 DOF), audio recording, survivable memory module, etc.
It's the deceleration that kills, not the speed. If you'd run at 130mph into a wall, the car may as well be your coffin. If you'd run into a field with shrubs/bushes, and not overturn, you'll be fine.
A "Video Wall" controller of this resolution is pretty much a Parallax Propeller attached to some serial network that slowly feeds the data to all of them. You could probably make it for $20 in small quantity, and the board with its male DB15 connector would plug directly into the PC input of the monitor.
This is one of the most insightful things I've read today. Thank you!
I think you must have a bad battery. My wife's neanderthal Motorola worked for 1-2 days until I changed the battery, now it lasts a week+. Even when new, the battery lasted only 3 days.
I vote with my wallet, and I'm vocal about it every time a distributor/vendor calls to complain we stopped ordering from them. I then tell them that I have no time to fax an order over, or even to reenter it every time I need 200 line items to replenish production stock/kits. A few distributors allow uploads of CSV or XLS files, and that works reasonably well, even though you still have to screen-scrape the entire process to extract the final outcome (what's in stock, what is the pricing, etc). It gets real boring real quick when you have to manually copy a 200 line PO to your ERP system...
I just happnened to visit the harbour seaport on a walk. Any large city with lots of water and lots of population spread out on neighboring islands will probably have a company offering seaplane rides. It's fun as hell, even if you really need to use those hearing protectors if you'd want to do it frequently.
Oh, if only column type was a problem. If they are a real enterprise with real history and real design, the SQL probably looks more like this:
DELETE from ENTERPRISE_VAL v001, ENTERPRISE_VAL v002, ENTERPRISE_LOOKUP lk001 where v001.kludge_15 != 44 and v001.col='fee' and v001.val = '2'
and v001.k018 = v002.k081 and v002.col = 'type_post_2010' and v002.val = 'card' and lk001.p3 != v001.lp3 and lk001.p4 != v002.lp8;
And that's on a good day.
Hmm, so they, for once took customer feedback seriously? What the heck just happened? A galaxy must have just imploded somewhere (from our vantage point, that is).
They must fly very slowly, then. Columbus, OH to Chicago is the same duration, but I had it take 45 minutes take-off-to-landing a few times.
If you're taking a jet -- true. If you're taking a small plane, then you will pretty much always beat the car over 400 miles. Just recently I flew on a single engine seaplane in Canada, and the whole procedure, without planning anything in advance, had an overhead of 5 minutes from walking in without even knowing what options are there to being on my way to the plane. We were airborne within 7 minutes of me signing the credit card slip. I know that such services are not available everywhere, but on a short notice the price is quite competitive with any legacy carrier. And they will fly you very close to your destination if there happens to be water nearby (or even a small airfield open to general aviation).
A 60 minute flight is more like 8 hours in the car...
So, since reengineering implies design and implementation (including building/putting it together), wouldn't it be cheaper to reverse engineer?
Yep, but I'm sure you can live OK in some areas in the U.S. for much less than in U.K.