More COVID-19

So a matter of hours after I post that the numbers don’t look credible, as if they were being constrained by a testing lab capacity issue or similar, China releases a big spike in infectious numbers and revealing they are now counting patients diagnosed but yet to be tested. It will be interesting to see if they change the reporting criteria for sites outside Hubei too.

It does reinforce this is an incredibly infectious virus, and illustrates how quickly business as usual health facilities reach their limits in a pandemic. Hopefully, the global response continues to be aggressive and effective.


The novel Coronavirus/Covid-19 outbreak that started in Wuhan is concerning.

It looks as though the virus is very contagious, and with a mortality rate higher than influenza – but with no vaccine or effective anti-viral treatment. What I am curious about are the figures being reported from China on infections and deaths.

For the past fortnight, infections have grown by a very regular number in the daily Chinese update. The figures don’t exhibit the variability you would expect to see in a normal distribution, and don’t reflect the growing infection totals. If they are accurate, the Chinese quarantine efforts have been spectacularly successful, yet fail with unexplained regularity. Hmm. Maybe there is a local limit in lab testing or other limitation which puts a daily ceiling on how many cases can be confirmed?

The last two days have seen figures released with a declining number of daily infections. Given the large population pool in Wuhan and the other major Chinese cities reporting infections, and the experience of cities like Singapore and Hong Kong, a decline infection growth strains credibility. I have seen a rumour stating only more severe cases are now being counted.

This is a concern if China has determined the economic impact of quarantine is greater than the increased illness and death a widespread outbreak would entail. If there is a lack of transparency, other governments might under rate the risk and severity of the illness, ultimately risking more exposure.

Hopefully, China has contained the outbreak, but it is disconcerting to watch figures that don’t reflect an expected path.

Some thoughts on blockchains and Bitcoin

I’m not a mathematician or Computer Scientist, but I like the elegance of a genuinely ne idea, so I’ve been watching the various block chain developments for a few years.
When BTC was under $30 I ran the numbers and figured my cost of power would never make mining profitable. When it spiked up over $100 I did the numbers again for cloud hosted mining, with the same result.
Now it is around $3000. Huh.


I think the blockchain currencies will end up being the less interesting part of the equation, unless you are using them to avoid Chinese currency controls, or deal drugs or something else you want to sell without a trail. The initial excitement was all about untraceable cash, but you can avoid taxes with cash today, and hold precious metals if you don’t want to be beholden to fiat currencies.

While bitcoin and other currencies (Doge, anyone?) are exciting in a speculative sense, and interesting in a fresh idea sense, they have a number of issues to be useful except in edge cases.
Number one for me is the energy use for mining and transaction processing. The algorithm that produces coins has increasing rarity built in, a bit like prime numbers in the real world, so to grow the bitcoin supply takes enormous energy – which could be used for productive purposes at less cost to things like climate change. This algorithm also ensures ongoing inflation, offering all the advantages of the gold standard in the 1970s…

Transactions also take energy to process, and there is debate at the moment on how to streamline this, but the current situation is that transactions are limited to around 7 per second, compared to VISA, for example, that typically handles thousands, and while there are ways to scale this, there are arguments against too – with the end result being a system that is less than ideal.

This combination suggests to me we’ll see examples of people ‘breaking’ the transaction system ‘for the lullz’, probably timed to coincide with bitcoin being launched for some legitimate, high profile system.

The other issue I’ll be interested to see merge is just how anonymous crypto currencies are. I don’t mean that there is a flaw in the implementation, but rather that privacy exploits will be developed that rely on meta data in the transactional record to breach anonymity. I don’t think this has happened yet, but I can imagine it being around the corner should transaction volumes grow enough that statistical methods can be applied to infer personal data from transaction patterns, timing, network origin etc.

In the future, I suspect the real action will be in Ethereum like block chain computational models, rather than currencies.
If you consider the blockchain mechanism as the underlying platform, then currency is just one application.
To draw an analogy, email was an early and cool application on the Internet, but the really innovative stuff that harnessed Internet technologies to make something with no real analog in the offline world came later, often much later.
When the Internet went mainstream in the early 1990s, there were plenty of people making a bit of money selling web hosting or writing client software, but much later the Googles and Facebooks arrived.
I think bitcoin is at the Alta-Vista or Hotbot level of maturity – people made plenty of money there but the world quickly moved on.
The Ethereal model is interesting, but there is little reason to use the Eth public coin (or, urgh, classic ETH), when you can host a completely separate fork for basically free. And less reason as the coin price rises.
So blockchain is real and useful. Coins are a valid application. They are a convenient current speculation, but like tulips or Hotbot shares, have little inherent worth. But the emerging applications might be very valuable.

Mac OSX Chrome adware malware Cloudscout removal

cloudscoutSomehow, no doubt after installing some bit of software from a seedy part of the Internet, I ended up with ads being injected into my web browser as the pages rendered. You get this stuff all day on Windows, but not something I’d seen before on a Mac.
I looked for suspect extensions, and found none, but disabled them all any way.
The ads took the form of aggressive animated gif banners, plus highlighted words in text linking to advertisements, see above.

I tried searching the file system for suspect software, but didn’t find anything useful. I also tried searching the Internet, but while there is info for removing this from Windows, there is nothing for Mac that works.

I ended up watching the developer console in Chrome to see what connections the browser was requesting. The list I got that I reckon is suspect is below. I added it to Adblock plus and the ads are gone. If you know what software is the culprit, please post in the comments and I will update the post.

Good Luck

Power button on iPhone 4s

The power button on my old iPhone 4s (ok, I suppose I should retire this phone for something a bit more modern, but the obvious Apple upgrade in near $1000! so I am looking at China androids. Anyway) stopped working.

The Internet says it is the surface mount cable strip under the button that is likely to go wrong. I ordered one that included tools for about $5 from ebay. I ordered a new battery for another $7 at the same time as I was going to be opening up the device.

It was an exceptionally tricky repair. Much harder than replacing a laptop screen or anything except maybe when I tried to surface mount solder some RAM chips to a Palm Pilot back in 1998 (I failed, and wasted $50 worth or chips back then).

Luckily, I was a bit better this time, but the internal design is pretty close to impossible to repair, as if Steve Jobs said make it hard so it can’t be repaired, just replace.

If you are brave, there are directions to fix it here:

and here: