Nissan Leaf grief … such is progress !

[Nigel Graham 2]

On Nigel Graham 2 Said:

Cynical sales ploys based on designing cars on combining “because-we-can” instead of “because-it’s-necessary” with over-rapid obsolescence.

The comments on when to charge the car presumably assume charging at home. If you have a proper, wired-in charger it has to be installed professionally, but whether that or the sort plugged into a 13A socket, use a time-switch.

It should not be necessary to use a portable telephone to operate everything…

Yes agreed. Maybe this is an area where the EU should get involved?

It’s not surprising though as whilst Nissan were one of the first to produce modern BEV’s, like other Japanese car manufacturers they don’t really seem interested anymore. Many are predicting the demise of the Japanese car industry.

[Michael Gilligan]

On Michael Gilligan Said:

On John Haine Said:

I HATE organisations that choose to advertise themselves with YouTube videos!  Most of us can read and those that can’t probably won’t be customers.  Especially when the video appears to be sponsored by another scam space heater that defies the laws of physics.

Sorry I spoke, John !

I used the YouTube link thinking it would be more convenient for readers

… Can’t do right for doing wrong round here !

.

… all the content [without any ####### external adverts] is available ‘clean’ on the website … which I have now linked in my previous post.

MichaelG.

Take no notice Michael. I’ve had similar comments because I haven’t written a complete precis to accompany a YouTube link so others can decide whether they want to click on the link or not.

[Nigel Graham 2Participant @nigelgraham2]

Howi –

No-one here is a “progress-denier”. There is no such being, particularly since “progress” is chronological, not a value assessment nor a synonym for “improvement” – or indeed “worsening”.

That habit of slinging the suffix “denier” about to denigrate anyone with whom you disagree about anything is neither useful nor polite; and usually not even true.

.

Bazyle –

I take your point about the use of the church and its hall being too irregular for a time-switch to be an efficient controller, but I wonder if any proper comparative work generally has been done on the various ways to heat a particular type of building?

It ought be easier for a private home, but even there we need consider whether it is better to leave the heating on, controlled by carefully-located thermostats; or run only at certain times of the day via time-switches, even if you also add a remote-control function.

.

I’d not realised the demand on a domestic WiFi router could be so high!  Presumably there is a practical limit?

 

As a digression I find that notion that 30 or 40 house guests to one party “will connect”, very sad and even rather eerie. Does it mean, that to each person none of the others present matter – apart from the hosts, and then as suppliers?

I recall one evening in my caving-club being the only member present. The rest were about a dozen young men and women, all in one guest group. Their organiser, I think she was, was busy on a lap-top, possibly with work or study. A couple in the corner shared another, possibly with a film or a game. The rest all tap-tap-tapped away on their own “smart”[?]-‘phones. Nowt was said, by anyone to anyone, among themselves let alone to me, and I felt unable to say anything to them; so found things to read. After about two hours of this Trappist isolationism I slipped out to the pub for some chance of real conversation with real people, leaving the “will connect” lot to their hermetic lives.

 

 

[Michael Gilligan]

On Michael Gilligan Said:

Does anyone here know more about the recent Jaguar i-Pace story […]

Story has been updated on Manchester Evening News

MichaelG.

[Ian PParticipant @ianp]

… and on the BBC news website

https://www.bbc.co.uk/news/uk-england-merseyside-68557652

[Nigel Graham 2]

On Nigel Graham 2 Said:

…

No-one here is a “progress-denier”. There is no such being, particularly since “progress” is chronological, not a value assessment nor a synonym for “improvement” – or indeed “worsening”.

…

.

…
I’d not realised the demand on a domestic WiFi router could be so high!  Presumably there is a practical limit?

 

…
 

Nigel is surely teasing when he claims ‘progress’ to be purely chronological!   According to my OED meaning 4b of the word is ‘Advance, advancement; growth, development; usually in a good sense, continuous improvement‘.   Not new – the improvement meaning dates from 1603.  The folk who advocate advancement and reform are ‘progressives’.

The practical limit of a domestic router is an interesting question.

Assuming the older less capable IPv4,  most support 254 hosts.  But, each host can have up to 65535 port numbers, allowing the host to multi-task.  Port numbers are like extensions on a private exchange, for both internal and external connections, and they could all be used simultaneously.   A few hundred are ‘well-known’:  Email (SMTP) is Port 25, Domain Name Server 53,  Web (HTTP 80, HTTPS 443), Printers 631 and many other services.  The rest are available to any program that needs a network connection, and many require several. Connecting to a website kicks off many cooperating tasks that connect to the network.  Other programs allow the computer to concurrently deliver email, and run user applications like CAD or Word, whilst printing documents etc etc.

Whether or not a router can cope with 254 hosts all actually using 65535 port numbers each depends on how powerful it is, assuming enough internet bandwidth is available.   Small old-fashioned routers are likely to bottleneck on much smaller loads due to having a slow processor, not much memory, and primitive electronics.  Even though a basic router can connect multiple network services,  it will struggle to maintain the necessary throughput, causing buffering and drop-outs. A posh new router will be more capable: although the device has the same theoretical limits as the old one, in practice it can support many more transactions before running out of puff.

It’s possible to find out what the limit is by stress testing the router.  Even small computers are plenty fast enough to hammer a home router.  Not difficult, if you know how, to program a computer to emulate several thousand high-speed typists and connect them all to a website!   Often done to ball-park the maximum number of users that can be supported by a server and its network connection, and to identify bottlenecks.  And by persons of ill-intent hoping to cause trouble…

Ideally, any router comes with enough oomph to deal with the peak load, but that depends on how it’s used.   Although many households still have low requirements, and almost any router will do, the trend is upwards.  A church-hall full of teenagers who must streaming high-definition video will need better than my set-up!

Most domestic routers are ‘good enough’ for the average customer when bought with a network package.  There’s little need to worry about details because a 1Gbs fibre connection will come with a suitably beefy router.   However, it’s a cruel world sometimes! All engineering endeavours have a point where professional skills are needed to meet the requirement.  The trick is recognising when one needs help.  Anything not already understood could be trouble…

Dave

 

 

 

 

 

[SillyOldDuffer]

On SillyOldDuffer Said:

 

Assuming the older less capable IPv4,  most support 254 hosts.

There’s nothing to stop you using a 192.168/16 address space or even 10/8, rather than the more common 192.168.x/24 address space. That gives you 65,534 or 16,777,214 addresses respectively. 😀

[Nigel Graham 2Participant @nigelgraham2]

Dave –

Note the phrase in that definition:… “usually in a good sense…”  Usually.

I was commenting on a rather dismissive remark Howi had made.

Thank you for the explanation of router capacities. It’s never going to be a problem for my use, with just one computer in the house and no Bluetooth etc. appliances, but I had asked out of interest.

[Author]

Posts