Friday, July 13, 2018

Extracting strawberry DNA

Following the instructions in Double Helix Issue 24 2018 to extract DNA from strawberries using common kitchen items and chemicals, plus methylated spirits, while keeping an eye on their blog to ensure it doesn't crash under load!

Mixing salt, detergent and water
Mashing up the strawberry with the detergent mix
After adding the chilled meths the DNA separates at the top
Sticky DNA!

Monday, July 09, 2018

3 Days of Winter School Holidays

Just about finished the third day of the winter school holidays and already:

  • Made a heartbeat flashing birthday card using Chibi lights.
  • Did two hours of karate
  • Chilled out during medieval reenactments at Winterfest
  • Donuts and pies at Berry (plus a birthday party)
  • Finished the Multivariate Calculus in Machine Learning Course
  • Almost finished editing a technical document for B
  • Helped Alex program the MicroBit and built touch buttons as lift controls*
  • Took him for a hair cut
  • Made pesto
  • Did my work
  • Watched a little bit of Runaway on SBS and wondered if some people in the robotics group were like Gene Simmons character.

Not sure how to survive the whole holidays at this rate!

Over the same period last year I was with the family in Nagoya, Takayama and Unazuki Onsen in Japan after doing the Northernmost and Easternmost stations in Hokkaido. Poor Japan is suffering severe flooding again. Last year it was Kyushu, this time Southern Honshu and Shikoku. 

* More information later. 

Tuesday, July 03, 2018

Mazda - Then and Now

Four years ago today we visited the Mazda Museum and factory in Hiroshima. Today, a new Mazda 6. A long way since the second hand Mazda 626 that did 275,000 kilometres.

Friday, April 20, 2018

Harry Potter and the Prisoner of Azkaban in Concert

Of all the Harry Potter movies this was both my favourite to watch and to listen to. And tonight watching it performed live by the Sydney Symphony Orchestra at the Opera House all I can say is "Wow!"

After a swathe of these concerts over the past few years, including the first two Harry Potters episodes last year, you know the drill. Tonight they got the balance just right and allowed John Williams' complex score shine through.

It had so many wonderful moments, from the cartoonish jazz of the Knight Bus to the drama of quidditch, the soaring Buckbeak's flight and choral mystique of the patronus charm. The most beautiful of the gentle Window to the Past as Harry remembers his parents.

If you've only ever heard the recorder played badly at primary school then you will be surprised just how lovely it sounds here.

Williams' orchestration is sophisticated and apart from the recorder many other instruments and sounds drew my attention away from the action on the screen. Subtitles meant that the dialogue didn't overshadow the score.

A fair amount of the score, including many beautiful fleeting themes, is lacking from the soundtrack release so there is much to listen for during the performance.

Unlike the previous Star Wars performance I couldn't fault the Sydney Symphony Orchestra or its conductor Nicholas Buckbeak's here. I simply enjoyed it all.

I had kind of hoped that they would stop at this point, when John Williams left the scoring duties, so I wouldn't be "forced" to pay for more performances (I've got the Empire Strikes Back later this year) but tickets to Patrick Doyle's Harry Potter and the Goblet of Fire go on sale Monday and the other scores are pretty good...

Sunday, April 15, 2018

Emergency broadcasts

The air is fragrant with smoke, the sky transected with grey. Since last night we have been told to stay at home and defend our house from ember attack.

Bush fires are a fact of life in this area. Back in 1994 my wife was living with her family in another part of this suburb and I was in Canberra, proving updates to the world over Internet Relay Chat based upon television reports.

Now as a resident of the affected area I have a personal interest in how information about the fire is communicated. The nature of media has changed since then and I've got some thoughts about the coverage of the bush fires from a local perspective.


We live in the Information Age and as such expect to have access to instantaneous and detailed information about events. The better the information you have, the better you can plan your actions. That is true both for those fighting the fire and those potentially affected by it.

I'm not certain how much information is gathered and available to the fire service from assets on the ground, in the air and in space. It would be interesting to find out. Potentially a lot, but combining that information into something useful for making decisions would be a challenging task.

I can imagine a mesh of sensors on firefighters, fire trucks, drones, aircraft and static assets all sending information back to base to be processed and combined by artificial intelligence. Challenging indeed.

And how to make that information available to the public?

Traditional media

During emergencies we are expected to turn to television, as I did in 1994, and radio for information. I did both but found the experience somewhat disappointing. Being a Saturday night the commercial television stations were more concerned with sports events and the sole free-to-air 24 hour news station, ABC News 24, was primarily filled with non-current news programming or reports on the airstrikes in Syria. This is the problem with being an underfunded national broadcaster, most of your audience are unaffected by regional fires.

Instead you are suggested to turn to ABC Local Radio, which suddenly presents an issue. Who has an AM radio outside of their car these days? I've got an old cassette player downstairs, but if the power went out I'd be in trouble finding any big batteries for it. Most devices run on something smaller.

I still have some FM radios in older mobile phones, though they too are being phased out by manufacturers. Still, it's a pity they don't have an FM broadcast instead. It does suggest I should buy a small AM capable radio, which would have the advantage of picking up the cricket as well!

Fortunately you can listen to ABC Local Radio streamed over the internet, but this takes up valuable bandwidth in emergencies and the infrastructure is more vulnerable to destruction than a distant radio transmitter.

Much as I like the ABC, the other downside of having to listen out for updates over the radio is putting up with their regular programming in between. I just have a different taste to music.

Social media and the Web

The other major source of information these days is social media. Everyone thinks it's something new, but as mentioned above, I was using it back in 1994!

There are useful websites such as the official Fires Near Me and Google's Crisis Map. The issue with the former is the very limited information it provides.

I followed updates from the NSW Rural Fire Service Twitter account, which shared interesting line scan maps of fire areas and videos, and local Facebook pages.

The problem with social media is information pollution. Official updates on Twitter get lost in streams of irrelevant updates from other accounts and on Facebook masses of non-time ordered questions and comments from ordinary (or worse, narcissistic) citizens. There is also the big issue of incorrect or malicious information (so called "fake news") can be inserted into these streams.

There should be an app for that

If one doesn't exist already I'm thinking it would be useful to have an official emergency warnings app for mobile phones. The app would have the following features:

  • An ability to detect the user's location or allow them to subscribe to other locations (useful when you are outside the area)
  • Emergency push broadcasts (eg imminent tsunami or new fire detected in your area)
  • On demand lookup as well as broadcast streaming of updates 
  • Interrupt media streams when updates are broadcast, allowing the user to listen to locally stored or streamed music or video without missing updates
  • Audio and video output as well as text (user selects).
  • Provide maps of affected areas and relevant transport updates.

Maybe there could be a forum or social media component to it focused only on that event, but not sure if that would be necessary or just too much trouble.

Might get chatting with some people at work to see what is already out there and what they think.

Right now the conditions have eased and it looks like we should be able to get a good night's sleep tonight. Even if we haven't as yet been directly affected it's certainly been a good opportunity to consider our disaster preparedness. And many, many thanks to all the emergency services for working so very hard to keep us safe. They are fantastic.

Monday, April 09, 2018

4th Kyu

Okay, a bit of self-gloss. Alex and I graded to 4th kyu purple belts in Ishinryu karate tonight. It took us 45 minutes and nine and twelve months respectively. And I got my first distinction!

I'm very proud of that. I thought I might have it in me this time. Everything has felt so natural these past few months, even the two katas, which definitely benefited from the additional instruction at the camp in March.

Two gradings ago I was a mess and felt terrible after my grading, after putting so much effort in while stuffing up many basic things. The most important things I've learned and practiced in karate and life since then is to relax.

I learned some techniques to relax from the flight anxiety course but also Sensei Alison and others telling us all to relax between each strike, each block, between moves in the katas.

Even last night when I knew I needed to sleep but was struggling to I used breathing techniques and muscle relaxation to focus the mind and body and stop it thinking and worrying. It worked last night.

And it worked tonight. Time to relax!

Monday, March 12, 2018

Five days of karate

I'm into the final day of five days of karate. Every year Ishinryu Australia hold a summer camp at the Wollongong Surf Leisure resort. This was my third year of attendance, my first of staying over for the full three days, beginning with a Friday night session.

On the Thursday prior the dojo hosted a special session from Sensei Wayne Otto, a nine times World Karate Championship winner and current coach of Norway. Also a bloody good teacher of kumite techniques and someone who can bring a smile to kids' faces no matter how well they try to suppress it!

The course was fantastic and I learned (or tried to learn) heaps of good stuff, including kumite moves, improving my kata and knife defense. There was an early morning session on the beach where I discovered that mindfullness and mean a pair of shorts full of wet sand.

Alex stayed with me. It was a lot of karate for a nine year old and he was a bit ambivalent about some of it until the Sunday when he entered the team blocker competition. Team up with our Sensei's daughter and her best friend the three of them made it to the final.

He drew his bout, then his team mate won hers. The other team won their round, but by only a single point, not enough to win on aggregate, so the combined scores were tied. So another round was fought, but they drew as well! It came down to Alex and another nine year old from his dojo.

Alex won and so his team got gold!

This was his first gold for anything and he had won it for his team. The look of joy and pride on his face was amazing and I was so proud of him too. No more "Can we go home now?" He wanted to stay for the presentation in the afternoon (and was even prepared to do his homework first!).

He had also competed in the team kata on the previous day and by virtue of there being three teams won a bronze trophy, also his first trophy ever. Considering the age and skill level of his team, especially compared to the high belts of the other competitors, I was just proud that they all gave it a go and tried so very hard.

I think we'll be back next year!

Tonight it's just the regular Monday session in the dojo, but the fact that I can sustain so many days of karate in a row is evidence of how far I've come in three years. Still stiff though!

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