Status-Q

If you have an electric car, and a home battery as well, you may have the problem that charging your car drains your house battery.

I’ve had a few queries after some of my other videos about how I avoid this, so here you go:

(Direct link)

When I was writing recently about ‘generations’ and ‘Baby-boomers’, I came across an interesting article talking about why the Baby Boom happened. It wasn’t just those soldiers coming back from the Second World War and making up for lost time, because it started in the 1930s. Interesting reading. Part of the motivation for the article, though, is that if we could understand why sudden changes in fertility rates happened, it might help reverse the current decline in birth rates.

This is something I have never understood.

Surely, the best thing we can do for the planet, and for the generations who will follow us, is to encourage declining birth rates wherever possible. Nobody likes to talk about it — it’s certainly not a vote-winner for politicians — but the single best way for a couple to reduce their carbon footprint is to have fewer children. If they can instil that tendency in any children they do have, too, their decision could have an exponential long-term impact through time. Forget installing solar panels or buying an EV! Spend the money on contraceptives if you really care about climate change. A world with less congestion, less competition for resources, less overcrowding, less pollution, less demand for housing, less intensive farming… can only be a better world, it seems to me?

We should institute tax benefits right now for people with fewer children, rather than continuing child-support for those who breed excessively. Those who install solar panels, drive Teslas and, most of all, are voluntarily childless, should of course be publicly honoured and cheered in the streets. (I may have a slight personal agenda here!)

Seriously, though… I know there are issues with an ageing population. Declining birth rates mean more old people hanging around for younger people to support. (Though in a country with a good social security scheme, that larger elderly population should at least have paid for most of their care up front during their working lives.) A declining birth rate also tends to lead to reduced economic growth and a few other challenges.

But it’s always seemed to me that these are short term problems, and somewhat selfish arguments. Yes, our modest numbers of children, grandchildren and perhaps great-grandchildren may not appreciate the demographic change until we’re well out of the way. But for those with a longer-term view, won’t the denizens of the 23rd Century be exceedingly grateful for anything we can do now to encourage population decline? And isn’t that the best way to ensure there will actually still be people around to enjoy the 24th Century?

I hear these phrases like ‘Millennials’ and ‘Generation Y’ in the media and realise I have no idea what they mean. Perhaps it’s because I don’t have kids, and so don’t know which pigeonhole the tabloids and marketing agencies want them to occupy!

I know roughly when ‘baby-boomers’ were born, but that was a phrase invented in the seventies to describe a genuine phenomenon visible in historical data. And I presume ‘millennials’ are people born around the turn of the millennium. But when did it become trendy to label other generations? And who decides on the boundaries and the letters? (I suspect the culprits are the same people who tell us that this is “International Year of the Aubergine“ and things like that.)

I have no more idea of which ‘generation’ I fall into than I do about my supposed star sign, and I suspect they are almost equally fictitious constructs. I’m guessing someone invented ‘Generation X’ because, while it was easy to say ‘grew up in the fifties’, it’s just too silly to say ‘born in the noughties’ (or whatever Generation X actually means). We really don’t have very good words for the last couple of decades. It’ll be easier in a little while when we can talk about a ‘twenties kid’. And if (as I assume), Gen X and Y (and I think there’s even a Z now) all came after Millennials, then they can’t really be generations, can they? There’s not enough time for them to have 20-30 years each… At least they’ve run out of alphabet now, so perhaps they’ll need to start using some meaningful names again soon.

Still, I was distressed to see the single-letter-generation-labelling game going on even in reputable newspapers recently, so I’d better go and find out what they’re supposed to mean, and what unicode character they’re going to adopt for my great-nephews/nieces expected in the spring. Perhaps it’ll be an emoji. I like to think they’ll be part of ‘Generation 😁’.

Yes, I’d better go and look it up. Otherwise I risk being relegated to that no-man’s land of the ‘post-boomer-pre-wikipedias’…

“Not all cottons are equal”, says the label on my new John Lewis shirt. “We use Supima cotton because it’s one of the most superior types of cotton in the world for creating strong, comfortable and colourful fabric.”

Oh, for heaven’s sake! One of the most superior types in the world? What do they teach kids in English lessons these days? Before you ask, this does appear to be a label printed by that old English retail partnership itself, not by the Bangladeshi factory from which the shirt originates.

Still, perhaps I’m being too fussy. At least they are only claiming it to be one of the most superior types, and, in any case, if I am going to wear a superior type of cotton, I should probably be grateful that it’s not one of the least superior types.

I wrote a couple of years ago about why I really like the Signal app for chat-style communications.  

(Quick summary: it’s just like WhatsApp but doesn’t require you to sell your soul and all of your contacts’ private information to the devil!)  

I’ve been using it for a few years now, for business and social discussions, and it’s been great.  It has very nice software both for mobile and desktop devices, and I know that several people have started using it because of my recommendations, too.

So I thought it only fair also to highlight here one of its key ‘limitations’; in fact, probably its only downside, as far as I’m concerned.  But it’s something fairly important that you may never discover… until it takes you by surprise.

Messages in a Signal conversation are transmitted using end-to-end encryption between the devices taking part in the conversation, and stored in encrypted form only on those devices as well.  Unlike some other communication networks, they are not archived on any organisation’s central servers and, on iOS at least, the messages are not included in any backups of the device.

If you buy a new phone, there’s a process you can go through to move your history directly from your old device to the new one, but here’s the rub:

Both devices need to be available and operational for you to do that.

There isn’t any other method. If you have lost your old iPhone, or it has completely died, then, while you can connect to Signal on your new phone and carry on your conversations, you won’t be able to see any past messages.  If you have them on another device such as an iPad or desktop machine, you should still be able to see your history there, but not transfer it.

There are good security reasons for most of this, and it certainly doesn’t stop me using Signal any more than it stops me using phone calls, but the price of the security is that you should consider Signal messages to be somewhat ephemeral.  Don’t think of them as an archive you will necessarily be able to go back and search indefinitely.  For that, it’s still better to use standards-compliant email… or to copy the important stuff into your personal Knowledge Management System.  You do have one of those, right?  

If so, make sure it’s something that you will always be able to get your data out of in future, like Obsidian.

At Telemarq today we were discussing some of the rather good Open Source text-to-speech systems now available, and testing them with some difficult-to-pronounce words.  They did struggle a bit with some of them, but who can blame them?

British names can be challenging at the best of times; I knew, for example, that Menzies is not usually pronounced as it appears, but I must confess to being ignorant of the fact that the surname ‘Dalziel’ is actually pronounced ‘Dee-El’ (which sounds like a class of droid from Star Wars, don’t you think?  “That old DL-4 unit will do fine.  We’ll take that one.”)

While looking at the Wikipedia page, though, my colleague Nicholas noticed the Dalziel coat of arms, which is rather striking, and should eliminate any suggestion that the Dalziels are not thoroughly human. Take a look! (The page does explain the origin too.)

If you examine the expression on his face, it can be fun coming up with captions.

“Listen, laddie, if I’m willing to come into battle armed only wi’ this, are ye really ready to fight me?”

I think Robert Burns would approve, though. “Gie fools their silks, and knaves their wine; // A Man’s a Man for a’ that:”

Heraldry, of course, has a language of its own.  Your family’s arms might be technically described as “azure a fess or between three mullets argent”, for example, and we are reminded by this Britannica article that ‘a bordure is an ordinary in England, but in Scotland it is never a charge, being reserved for cadency. Some count the roundel as a subordinary, while others consign it to the “others” category as a simple charge.’  

Actually, if you read the article, you’ll understand the above. (I had a splendid teacher at school who believed that a well-educated English gentleman ought to have at least a smattering of knowledge of a range of topics that weren’t in the normal curriculum, and would take the odd lesson out to tell us about them, so I gained some awareness of those who charge a field purpure or a bend sinister with a lion rampant, when I should technically have been learning about Thomas Hardy.  It’s wonderful stuff.)

There are rules to be followed too. The aforementioned article reminds me that “a colour is very rarely placed upon a colour, a metal upon a metal, or a fur upon a fur. “

All of which made me think this would be a fun body of material for training an AI system.  Could you create something which, given a coat of arms, would return the correct heraldic description, and vice versa? And then, phase 2: given somebody’s ancestry and history, could you create a coat of arms for them following the conventions and the rules?  I fancy doing another PhD, so if anybody could kindly come up with a source of funding for this, I propose to create such a system and name it ‘Sable Basilisk’, in honour of the character of that name immortalised by Ian Fleming.

The funder of my research would, of course, have a beautiful coat of arms generated just for them.  If they’re really lucky, it might resemble the Dalziel’s.

John’s excellent column in the Observer this weekend was a reminder to those of us who enjoy driving EVs that we shouldn’t feel too smug about our environmental impact.  

Electric vehicles have a greater carbon footprint in their manufacturing process than fossil-burners, and it takes a while for the environmental benefits after you drive it off the forecourt to make up for this.  In countries like the UK, where it’s relatively easy to get your electricity from renewable or nuclear sources, that’ll probably take about 6-12 months.  In countries like the US where you’re probably getting a lot more of your ‘fuel’ from coal, it could take several years, and it’ll probably be the second or third owners of an EV who really have a more carbon-neutral vehicle! 

In the intervening period, though, we can feel a little bit more virtuous because — and I do appreciate that any pro-EV points I make in this post might definitely be classified as self-justification! — at least we have moved a lot of pollution away from highly populated areas.  (This is distinct from carbon footprint, which can happen anywhere and has a much greater area of impact.)  When it comes to human health, though, we’re only starting to get to grips with, for example, the damaging effects of the tiny particulates emitted from exhaust pipes — Tim Smedley’s book Clearing the Air is an excellent explanation — and the key thing about them is that they don’t travel very far.  You are more at risk in a cycle lane next to traffic than are the pedestrians a few meters away… especially if they walk on the further side of the pavement.

I’m often annoyed by people who sit stationary with the engine running, while waiting for their kids to come out of school or their spouse to come out of the supermarket… and then I have to remember that the poor things are in such primitive vehicles that they can’t even keep themselves warm in their cars without polluting the local area.

Long-lasting?

One thing we don’t know much about yet is the longer-term outlook for individual vehicles, because they just haven’t been around long enough.  EVs are generally expected to outlive their internal combustion predecessors because they have far fewer moving parts, less vibration, less thermal stress, and so forth.  Yes, the batteries will have a limited lifespan, but they can be replaced, and they don’t get thrown away: their consituent materials are much too valuable not to recycle.  

What’s also sometimes not appreciated by the Jeremy-Clarkson-watching fraternity is that these aren’t like phone batteries where you have to replace the entire thing. Car batteries are made up of lots of cells packaged into modules, and individual modules or even cells can often be replaced when they start to fail.  Yes, we all know rechargeable batteries do wear out… but they don’t die suddenly; their capacity just decreases over time (or more specifically, as they go through an increasing number of charging cycles, which usually corresponds to mileage).

When Nissan started producing the Leaf, they announced all sorts of plans for how they would recycle and reuse the batteries when they were no longer useful in the cars.  In fact, though, few of these plans have really come into play yet, because cars and batteries are lasting far longer than expected. 

Part of the reason battery life has never really worried me from a practical or financial viewpoint is that battery range has also been increasing.  This page describes a study of Tesla Model S batteries (the Model S having been around longer than most), and includes a nice graph showing the battery degradation against mileage:

Now, I happily drove my previous EV for 5 years, which had a range of about 70 miles.  My current car has a range of around 300 miles.  If it follows this trajectory, then after 20 years of my current 10,000 miles per year, it will still have a range of around 250 miles, which is plenty for almost anybody, and certainly for me!

Let’s talk about cobalt

The issues around the sometimes-worrying mining practices of the rarer elements involved in battery manufacture are well known, and a cause for concern.  Cobalt, in particular, is a key component of current batteries and is mined almost exclusively in the Democratic Republic of Congo.  Somewhere in the range of 15-20% of this is done by small-scale mines, often in hazardous working conditions, and some modest proportion of this is done by children.

Certain companies, like Tesla, claim to have eliminated these sources from their supply chain, though how much they can really have achieved this is uncertain.  It’s partly for this reason that there is significant research going into creating cobalt-free batteries, but in the meantime, it is a situation which needs (and is getting) considerable attention.

It is, however, a situation for which we are all culpable, not just EV owners (though we EV owners take more of the blame).  But you’re probably reading this on a device that includes a battery containing cobalt.  And cobalt is used for many other processes too.

Something like 41% of cobalt production is for use in batteries.  And roughly two-thirds of that – about 27% of the total – is for electric vehicles.  (Sources here and here.)  So the proportion of cobalt used by EVs is about the same as the combined use in carbide-tipped drills, paints, and cobalt-based catalysts (the vast bulk of which are used, in fact, for oil-refining!)

So we should treat with skepticism those headlines that suggest that there’s child labour in cobalt mines in the Congo because of EVs.  Yes, some single-digit percentage of cobalt production does involve children, and yes, there’s more of it because of EVs.  We EV owners need to acknowledge that, while also pointing out that EVs represent only a quarter of the cobalt use in the world. Anyone who owns a laptop, iPad or mobile phone, or drives or travels in fossil-fuel-based vehicles… even people who like blue paint — we all need to take responsibility.

And while admitting that our electric vehicles do not come guilt-free, I think we do need to remind that bloke in the pub that powering internal combustion engines has been known to have one or two negative aspects too!  Conscience doth make cowards of us all.  🙂

On Sunday I had a video call with an old family friend, Marjorie, who has just celebrated her 103rd birthday, and is doing well. To put that in context, she was a teenager when the king acceded to the throne. No, not the current king. His grandfather. You know, the one whose daughter reigned for three score years and ten after him.

So I had longevity in mind when I saw Charles Arthur’s link to a rather nice study by S. J. Newman from the Australian National University, looking at the data about other people who have lived beyond 100 years.  The records of supercentenarians tend to cluster in particular geographic areas, and many reasons have been suggested for this.

As the paper says,

The observation of individuals attaining remarkable ages, and their concentration into geographic  sub-regions or ‘blue zones’, has generated considerable scientific interest. Proposed drivers of remarkable longevity include high vegetable intake, strong social connections, and genetic markers. Here, we reveal new predictors of remarkable longevity and ‘supercentenarian’ status.

It’s a nice read, and a good lesson in why those involved in data analysis sometimes need to dig a bit deeper.

The quick summary is that areas reporting large numbers of supercentenarians not only have high degrees of poverty, social interaction, and high vegetable intake.  They are also areas where reliable record-keeping was only recently introduced, or where there may be other reasons for assuming that reports of very old people are not entirely accurate.

Some of this can be deduced by looking at the data directly, for example the fact that “supercentenarian birthdates are concentrated on the first of the month and days divisible by five” or that some areas with numerous residents in their 100s seem to have surprisingly few residents in their 90s.

Sometimes there are other reasons for doubting the reliablility of the data:

The large-scale US bombing and invasion of Okinawa involved the destruction of entire cities and towns, obliterating around 90% of the Koseki birth and death records with almost universal losses outside of Miyako and the Yaeyama archipelago. Post-war Okinawans subsequently requested replacement documents, using dates recalled from memory in different calendars, from a US-led military government that largely spoke no Japanese.

Sometimes, past researchers have had to use their own judgement when assessing individual cases:

Individual case studies often highlight the role of personal judgement, and the potential for both conscious and unconscious bias, during age validation. For example, Jiroemon Kimura, the world’s oldest man, is widely considered to be a valid supercentenarian case. However, Kimura has at least three wedding dates to the same wife, has three dates of graduation from the same school, was conscripted to the same military three times in four years despite the mandatory conscription period being three years long, and has at least two birthdays.

Then there are the financial issues to consider:

In 1997 Italy discovered it was paying 30,000 pensions to dead people

and

A subsequent 2012 investigation by the Greek labor ministry was triggered by the “unusually high number of 9,000 Greek centenarians drawing old-age benefits”, a notable figure given the 2011 Greek census found only 2,488 living centenarians.

Yes, the sad conclusion is that:

Like the ‘blue zone’ islands of Sardinia and Ikaria, Okinawa represents deprived regions of rich, high-welfare states. These regions may have higher social connections, and arguably may have had higher vegetable intakes in the past, but they also rank amongst the least educated, poorest, highest-crime and least healthy regions of their respective countries.

Lastly, you know those reports that the longest-lived are often people whose lives are characterised by smoking, drinking and unhealthy lifestyles?  The paper has some wry comments about that too:

It is unclear why clinically excessive drinkers or daily smokers should survive at equal or higher rates, and increase in population frequency at extreme ages, unless these lifestyle factors are positively correlated with committing fraud or having an incorrect age.

And, referring again to the decisions of the researchers who build the databases:

A reliance on this type of opinion, where qualitative judgements are employed to shape public perceptions of authenticity, seems to be widely considered satisfactory. This seems particularly the case when explaining the otherwise anomalous health habits of supercentenarians. For example, Maier et al. issued a contradictory statement that Jeanne Calment smoked both one and two cigarettes a day for an entire century, followed by the justification that this counter-indication of health could be explained because she “possibly did not inhale at all”.

It was likewise observed that, from age 20 to age 117, the then-oldest man in the world, Christian Mortensen, smoked “mainly a pipe and later on cigars, but almost never cigarettes… he had also chewed tobacco…but never inhaled”.

Why two people would voluntarily choose to smoke for an accumulated 190 years, yet never inhale, was never explained.