Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment Re: So absurd to pose this as a mystery (Score 1) 63

Like every other oil-and-gas producing nation. Though there are significant costs for the materiel of production - pipelines, pressure valves, etc. Their "cost per barrel to the wellhead" is lower than for some countries, but the main factor in that is always how much tax the government take. Which is how the West (UK, America, essentially ; some input from France) set up their oil economies in the 1930s to 1950s.

Comment Re:Hypothetical question (Score 1) 26

This I know - I was on about the 4th time around that loop, and I guess I fat-fingered something and lost the post.

Do you ever not get the "this check is taking longer than expected" warning? It normally takes several minutes for that page to load for me - I assume it doesn't like my mixture of ad-blocking and NoScript. Which is Cloudflare/ Slashdot's problem, not mine. If they don't want comments, comments they won't get.

Does Slashdot actually have advertising? I've had that "Advertising disabled because of your contributions" checkbox for so long, I can't remember when it appeared (Before or after the Millennium? I can't remember. I guess it switched on when I reached 100 or so successful submissions, but I've never made any effort to find out.

But they're definitely enshittifying the site, as Cory Doctorow would say.

Comment Re:A Walkable City? (Score 1) 199

Many people would not consider the idea of transit or driving not being much faster than walking to be a feature, but you do you.

You're confusing description with approbation.

Since we don't have ultra-diffuse suburbs here (typical house plots are 8~10m wide on the street frontage) we don't get the large distances where transit can get much above walking pace. With bus stops every few hundred metres, and a busy bus system (so many of those bus stops getting used for pick up, drop off, or both), the bus rarely gets up to the speed limit. And that's in slack hours, not the rush hour. Several addresses ago, I was in the habit of taking buses on some of the long boulevards to get to or from home, and I could be watching the next bus hove into view for 10 minutes before it got to my stop - and I'd have walked 3 or 4 stops in that time. But that was an unusual situation of long straight roads combined with moderate hills, so you could see a kilometre or more along the road. Most cities didn't have that phase of expansion and moving the city centre away from the medieval centre, so you didn't get those long sight lines.

Sounds rather ableist.

You should see some of the disabled-bike-chairs that are the norm in Africa. There's no profit margin in making them, so the market here is for motorised devices these days. But that's a failure of the infallible market, not a technological problem.

Comment "Sparking" ? (Score 0) 136

Well, for values of "sparking" that include "adding just another example to a debate that was over some time before the Millennium Bug became a serious concern".

It's very simple : if you don't have a hard copy of the installation media, that works on a machine without serial, USB, WiFi, Ethernet or RFC 1149 access to any network of any sort, then (this is the hard bit - concentrate! - you can get there! ) YOU do NOT own IT.

You may have temporarily leased a copy of $WHATEVER$ software, but you own it as much as you own your taxi driver's vehicle. (I don't know about Uber's vehicles - if they operated within an hour's drive of me, I might pay them enough attention to find out.)

Come on "digital natives", this argument was over while you were still trying to master bowel control. It's not news, and if you believe anything else, then you have been lied to, successfully. The people who lied to you are probably intending to steal from you, somehow. It's called "life" ; get used to it, because humans (and businesses) aren't going to change if they're successful in hoodwinking people like this.

Comment Re:A Walkable City? (Score 1) 199

Few people would walk across even a small city in any reasonable amount of time.

Define a "reasonable amount of time". I live in - and walk around (I should start the car some time this year, but it's probably rusted solid. Meh. Useless machine.) a small city of about 50,000. (It was the nation's capital for a century or three - I'd have to read it's history to check.) Takes about an hour, edge to edge, which I find perfectly reasonable. If I want to travel faster, I walk to the bus stop, wait for a bus, then use that. It doesn't really save much time. Because the road network was designed for horse and cart, using the car doesn't save much time either.

Of course, I could think of the small town I grew up in - totally nothing special, about twice the population of the small city I live in, slightly larger, and takes twice as long to get anywhere, unless you go out ti the outskirts and use the ring road - which normally means driving twice as far as necessary. And oddly, still takes about the same amount of time to get anywhere. A fifth of the number of bus routes though, so you really need a push bike if you want to get around fast. Road network designed for horse and cart, about the same time as the "small city".

Comment Re: A Walkable City? (Score 2) 199

No hand-waving was required. The plan was to have high-speed and low-speed railways in each direction built below the human-friendly strip. The high-speed line would stop at, approximately every 10th station (say every 10km); the low-speed at every station (about every km, whatever that is in American ; 10 minutes walk, -ish). At the ends of the line ("harbour" and "inland") the trains loop back from "inland" to "shoreward" directions. You could add an interchange wherever the "city" intersects the "along-shore" railway system.

Nothing complicated there - just rational city design.

No cars. They've been designed out at the start. Similarly, no roads - just walk ways and cycle ways. This may sound heretical in some parts of the world.

Comment Re:So now what? (Score 1) 25

Not quite.

As an organelle, it should be carrying enough DNA (and replication biochemistry) to duplicate itself, but will probably have transferred some of the genes it needs to prepare some of it's precursor materials to the enclosing organism. Which means that it then becomes an obligate endosymbiont (it is obliged to live in a host with those biochemical tricks).

So, you'd need to identify the sections of host genome that the organelle depends on, copy them (for which CRISPR may well be appropriate) into the new host organism (along with the necessary control proteins, genes, etc), then inoculate the modified organism with the appropriate strain of the organelle.

If you were adding it to a commercial food/ profit system ("crop" is so 16th century), you'd need to prevent it from breeding without buying something (an artificial dependency, like Monsanto are dependent on annual revenues), while not (ehemm) eating into your profits from your "corn" food/ profit system. You'd market the "artificial dependency" chemical as a safety feature, to prevent the new food system from reproducing without active human input (and AgroBiz profits).

Comment Lynn Margulis waving from her grave ... (Score 1) 25

... and shouting "I told you so!"

Which she did, in the early 1970s, with the then-controversial suggestion that chloroplasts and mitochondria came into existence as separately achieved symbioses between bacteria (with particular biochemical tricks) and multiple strains of bacteria without those tricks. Then later, the symbiotic bacteria lost DNA and cytoplasm to become "organelles". In at least one case, it happened twice (yielding mitochondria and chloroplasts within plant cells - hardly unsuccessful!)

Some time later (late 1970s, mid-1980s, I'm not sure) she further suggested symbiosis as an origin route for (IIRC) Golgi apparatuses (for fat metabolism), nuclei (for finer control of protein synthesis), actin fibrils (for muscles, motility and the endoplasmic reticule)... and a list of other things too. Which seemed to be stretching a good idea a bit far. But now ... well, we're a step further towards Margulis' scenario.

Submission + - New charger could double the service-life of Li-Ion batteries 1

NewtonsLaw writes: Lithium-Ion (LI) batteries are the backbone of much of our modern technology. They're in our phones, our laptops, our smartwatches and even the EVs that are increasingly appearing on our roads. One of the problems with LI technolgy however, is the very finite life of those batteries.

In the case of an EV, the battery pack represents a very significant portion of the total price you pay when buying one. Right now, the life of EV batteries is generally considered to be at least eight years, under normal use. But what if that could be doubled — simply by changing the way those batteries are charged?

This announcement by researchers in Europe indicates that the service life (ie: the number of charg/discharge cycles) of LI batteries could be as much as doubled, through the use of a pulsed current charging technology.

The standard charge method for LI cells is to deliver a constant direct current (DC) until the voltage of the cell rises to around 4.2 volts, at which time the voltage is maintained at a constant level and the charge current allowed to fall off. Once the charge current reaches a predefined minimum level, the cell is considered charged.

The new pulsed current method does not use DC but instead opts to recharge by way of intermittent pulses of current. This is not a new charging technology although it's not the norm for LI cells. Pulsed current chargers have been used on older chemistries such as nickel-cadmium in order to reduce/eliminate the formation of dendrites that would otherwise create short-circuits or significantly increase the self-discharge rate. Applying this tech to recharging LI cells seems to be a significant game-changer, if the lab results are duplicated in "the real world (TM)"

Doubling the life of your EV's battery or even your smartphone's battery is no small thing.

Comment Re:Lots of OCR errors. (Score 1) 102

Never encountered that in the 1980s. Though I did have a friend who, like you, made a little money on the side typing up people's theses for them. And inserting up to 11 "Judas pages" with deliberate erors [sic] on them, to encourage the recipient to do their proof reading carefully. (He'd say there were a dozen "Judas pages", not 11.)

What you describe would have been fought by the SRC (Student's Representative Council : trade union, in effect) as being biased against poorer students, and in favour of richer students. Which may be acceptable behaviour in America, but in socialist Britain, didn't fly. Marks could be deducted for poor handwriting, sloppy diagrams, etc but this was meant to be a minor part of the marking, unless it was so bad that the work was literally incomprehensible.

It's not as if your work was expected to be returned so quickly that you didn't have time to do a "rough copy", and then a "copy book" copy. Indeed, this was strongly encouraged as a way of developing the habit of writing, then editing and reviewing your work before presentation. In short : professionalism. I gather that is no longer valued significantly. Certainly not on Slashdot.

Actually ... one class lecturer - mathematical statistics - did issue homework on Tuesday afternoons, to be marked "in seminar" on the Wednesday morning. But you were expected to present your work as a "round robin" at the blackboard, passing from one class member to another at the TA's whim. But there, your marks were awarded on your presentation to the seminar, not the beauty of your notes, and the actual red-pen marking was done by your seminar neighbour.

Comment Re:Hypothetical question (Score 1) 26

What do you think is the velocity of a particle (say, falling from Sedna's aphelion to the surface of a Sun-size BH) when it crosses the event horizon. And consequently, what is it's time dilation factor?

It might break the speed limit. For tarmac roads. Small-integer fractions of c ? I don't think so.

Slashdot Top Deals

The rule on staying alive as a program manager is to give 'em a number or give 'em a date, but never give 'em both at once.

Working...