Showing posts with label power. Show all posts
Showing posts with label power. Show all posts

Tuesday, 13 July 2021

"Ancillary Justice" trilogy by Ann Leckie - positive review and discussion

"Ancillary Justice" (book 1 - 2013), "Ancillary Sword" (book 2 - 2014), "Ancillary Mercy" (book 3 -2015).

►Review:

"Ancillary Justice" is the first in the highly acclaimed, multi-award winning "Imperial Radch" series, from a debut female author [Wikipedia, Goodreads]. It felt very different from most of the sci-fi that I've read and loved, in not being primarily about a technologically exciting setting, cosmologically consequential events, or near future insights. It's overwhelmingly character driven, with an extreme focus on their development and back story.

Consequently, I was not utterly riveted by the first book, coming to it a couple years late, with a gap of a few more years before recently returning to finish the arc. But the story really grew on me; I can understand why this caused a splash.

I'd describe the core (feel good) hook of these books as ethics competency porn. The central character, Breq, always seems to hit the nail on the head, in terms of picking the most righteous course of action. Even in thorny situations, sticking it to the callous powers that be, etc. In a similar way to how Iain M Bank's Culture novels have a kind of ship mind competency porn, where it may come down to the last breath, but they clutch it out somehow, against all odds. More on the link between these authors, later.

Much has been made of Leckie's unique take on gender [e.g. Slate]. With Breq's biological sex never explicitly confirmed. Equality and gender neutral pronouns are one progressive aspect of the deeply flawed Imperial Radch empire. Feminine pronouns are always the default: she/her. Breq struggling to accurately gender some of the people they meet is certainly a cute device to accentuate this point. But it made less sense to me by the end of the series; when she was the troop carrying spaceship "Justice of Torren", she will have been intimately involved in matchmaking and interpersonal harmony between the many officers of her crew.

See, Breq is the last surviving fragment of a millennia old ship AI. Out, from the start, for revenge against the tyrant who murdered the rest of her. In the first novel, the story and meaning behind that unfolds in flashbacks interwoven with her travails on this quest. It's built up in a way to really put the reader into the shoes of this perpetually angry but compassionate intellect. Dealing with loss of function, identity and purpose. Redefining herself as she unexpectedly builds up a new life, sweeping through the whole arc to a satisfying conclusion.

The prose is well written and paced, with the occasional song lyric snippets included, that didn't make me turn off or really cringe; songs and their collection is a core personality trait of our protagonist. The latter two books are essentially linear, by comparison. And set in roughly the same place; this isn't a romp around the galaxy. Instead we explore in more depth, as events develop and unlock new possibilities.

There's certainly exciting build-ups and some interesting action. But generally it's more low key and human scale - tactical and psychological. Perhaps more of a stereotypically female thinking approach to things, overall, with tensions bubbling under the surface of outward civility. A lot of weight placed into subtle details and even menial activities, that, on paper I wouldn't have expected to get on board with. But fell into an easy rhythm.

I was really glad I read the whole of this trilogy, by the end. Hitting a very satisfactory conclusions via an often unexpectedly understated route. Although I wonder if it will be less memorable for me, in not hitting the more physical/technological notes that usually excite my interest. This trilogy might be good for fiction readers who don't normally go for sci-fi; maybe genre gateway books. 


► Discussion with SPOILERS!: much of the text below is content summary, as I struggled a little to pick many outright faults or failings. Nor interpret meanings too far beyond some fairly direct, probable and some (perhaps) wishful thinking references.

Thursday, 18 December 2008

Top Gear's misrepresentation of Hydrogen Verses Battery Electric Cars

I'm referring to the most recent Top Gear - Series 12, episode 7, [previously] viewable here: 

James May's review of the Honda FCX Clarity (at the end of said episode) makes out that the very limited production (essentially concept) hydrogen fuel cell car is near perfect, ready to save us from the outdated uselessness of battery power cars. To really bang this home Clarkson has already demolished 2 Tesla Roadsters on the track earlier on.

What was plain ignored:

 - The hydrogen tank has the most flammable gas known to man stored at 340 times atmospheric pressure! I'm not scaremongering, this is still a huge issue holding back hydrogen cars; the gas is only a liquid at -250 degrees C (at standard pressure). Billions are being spent on developing storage substances that can hold and release the gas safely. So far they have efficiencies of about 0.1% hydrogen to substrate, by weight.

Above: 5000psi hydrogen storage tank being fitted to a Honda FCX Clarity.
 - Hydrogen gas has to be liberated from petrochemicals (oil) or electrolyzed from water using electrical energy. This process has much greater inefficiencies than with electrical battery storage.

Clarkson, and the "Top Plug" team, while continually pouncing on battery cars for refilling from power station electricity, appear to have swallowed the "hydrogen is the most abundant element in the universe" line and presume it's just lying about ready to fling in your car.

 - There is *no* hydrogen distribution system in place and is not going to be one anytime soon because it is so difficult and expensive.

 - There is (and has to be) a sizable lithium battery in the Honda Clarity for energy regeneration under breaking and buffering the power from the fuel cell (because it is too slow on it's own).

In fact, this car uses identical technology to the Tesla, except that a hydrogen cell recharges the drive battery, instead of having a bigger battery or a high efficiency petrol generator topping it up (like the PML flightlink QED Mini).

What I can't wait to see is the all British Lightning GT driving around the Top Gear track after their first cars are produced in 2009. They use PMLs 'Hi-Pa drive' system of 4 in-wheel motors, which give the Lightning the same 0-60 time as the Tesla, but a slightly higher top speed, no overheating problems and 4 wheel independent drive for perfect handling.

 Above: Lightning GT
This technology has also been taken fully on-board by Volvo who have a serious plug-in hybrid scheduled for full roll out in under 4 years, and there is the Ford F150 pickup truck concept demonstrating that big vehicles can be made green just as easily.

[UPDATED 2014-03-26 - Refurbished with new pictures.]

The Lightning GT seem to have dropped hub motors some time ago, and this link (previously included) is officially dead - http://www.hipadrive.com/phev.html

But more recently, engineering CEO superstar, Elon Musk, called out fuel cell bullshit too.

Thursday, 19 April 2007

Near future of automotive propulsion:

Lecture this evening by a guy from PML about their electric BMW Mini QED (quad electric drive):
0-60mph < 5 seconds
65-80 mpg with approx 600 mile range
zero emmissions for short to medium travel

Wheel hub motors (4 of): 750Nm, 15kg, 480A, 450V, 1800rpm.
Brushless permanent magnets, constant torque at all speeds.
Integrated inverter circuitry: 24 Phase sine wave (IGBT), water cooled.
Regenerative braking, dump resistors for excess energy.
No friction brakes!

Battery: 300V, 70Amp hour, Lithium Polymer (700A peak).
Therefore: 21kW hour, 75600000J=75.6MJ
(typical lightning bolt ~500MJ; thinking about accidents)
100 mile battery range @ 70mph

Ultra Capacitors: 350V, 11 Farad, 700A limited (3850 Coulombs)
Therefore: 0.67MJ

Generator: 250cc, 2 stroke gasoline, 15kW (at it's 7000rpm).
Power required to cruise at 70mph

Energy re-circulator: 1400A IGBT distributer.

Indipendent traction control via torque adjustment, yada, yada...

Thier inovation is in the compactness of the motor (their speciality) and the efficiency of the motor drive electronics (IGBT). The generator could be a fuel cell, or any other portable source, but battery/capacitor advancements look set to make everything else obsolete.

It's basically the prototype of the type of car comming off the line in the film Minority Report (i believe Tom Cruise gets trapped/built into a chasis during a fight, then escapes by driving it away!): Basically, new cars in the next couple of years (PML claim to be working with 3 large scale automotive manufacturers to bring out full products by the beginning of next year) will be the prototypes of car perfection: chasis with 4 integrated motor/wheels and a really big capacitor. They'll be charged up at home, in car parks, at *power* stations, probably by inductive coils (or wireless power transmission, when that technology properly comes of age) so u'll probly forget about this strange concept of fuel (!?) altogether...

All that's left is for the cars to drive themselves, then u have the perfect private/public transport system. Public transport with a driverless, pollution neutral fleet of vehicals of any size. Providing door to door, personalisal transport and dynamically reroutable busses for the busiest routes (to avoid rush hour/end of night, taxi rank style queues).

Can't wait to see if stanley pulls off safe town driving during the next grand challenge installment this November. But in a way i'd rather the problem wasn't solved too quickly, so that i personally have some time to work on solving it. Naturally there's always room for improvements.

I'd say this will all be realised in well under 20 years (for post industrial regions). Maybe that sounds too good to be true? Well, u'd better get used to lots of stuff sounding like that and then *actually* happening; it's the Singularity baby! Though i need not preach to a public that take for granted mobile phones and internet access, u now couldn't live without, when u hadn't even heard of such things 20 years ago!

Wednesday, 15 November 2006

On the tide

Just been to a IMechE organised lecture on a tidal turbine power solution by TidalStream at Foster Wheeler, just down the road. Basically, they're a start up with personnel experienced in wind energy putting together designs with a view to producing modules placed in deep sea water (over 40 meters) which has particularly high tidal flows.

Seems like a solid idea, using a resource that could provide around 20% of UK demand, as we have favourable geography; Atlantic flowing around to fill/empty the North Sea twice a day.

Variable but highly predictable power generation, about par with off-shore wind power for pricing. Worry of physical impact dangers to medium/large sea life, which weren't mitigated by the speaker. Also, what amount of large debris is there floating about in the seas in these regions that could make such systems untenable (a rouge shipping container lurking about could easily put one of these out of action).