Thursday, 26 February 2015

Episode 13, 22nd February 2015

The running order and show notes for episode 13 of The Wonder of Stuff...

John talked about Superfish/Komodio - The Spy In Your Computer;
Ross talked about HTTP2;
Richard talked about the new Biological Strength Record;
- John

Wednesday, 18 February 2015

Episode 12, 15th February 2015

The running order and show notes for episode 12 of The Wonder of Stuff...

Ross talked about Samsung - The Spy In Your Living Room;
John talked about On-The-Fly Genetics;
Richard talked about Can Humans Multi-Task?;
- John

Monday, 16 February 2015

Can we multitask?

This week we discussed multitasking on the show. We live in an age where the constant checking of emails comes with the territory in many workplaces. In the home, text message notifications and those from social media applications are now common place on our phones, and form part of modern life.

We call it multitasking when we think we are doing several things at once, but what we are actually doing is rapidly switching from one task to another.

This idea can be traced back to 1954 when James Olds and Peter Milner of McGill University, reported evidence for the existence of the brain's reward centre. In an experiment on rats, the Olds and Milner paper demonstrated the dramatic behavioural effects of reward and aversion. Their finding was that rats would continually press a lever to receive a brief pulse of electrical stimulation in the the septal region of the brain. The rate of reinforcement from the electrical stimulation was at least comparable to that produced by natural rewards, and the paper inferred that stimulation in this brain area was somehow rewarding or positively reinforcing in of itself. This provided the first key evidence for the existence of certain regions in the brain that process reward/reinforcement. (Likewise Olds and Milner also were able to demonstrate that sites in the lower centres of the same brain region could be stimulated to provoke the opposite effect: aversion; the rats would do everything possible to avoid the stimulation, but this is veering off topic).

When we reply to an email or check our twitter feed and see some new information, the septal region rewards us. The preprontal cortex is bias towards novelty and so these activities create a dopamine feedback loop which ends up rewarding your brain -much like the rats- for losing focus and searching for that external stimulation. Think Homer Simpson.

Attempting to multitask also increases the production of the hormone cortisol which makes us feel stressed, as well as adrenaline and opioid, which puts us into fight or flight mode. This can overstimulate the brain and make it difficult to hold on to a thought. Shifting attention (what we are actually doing when we think we are multitasking) causes the the prefrontal cortex to use up oxygenated glucose, literally using up the nutrients the brain uses to stay on task. The continual shifting we do when rapidly switch activities in this way burns through fuel so quickly that we feel exhausted and disoriented after a short period of time.

Ironically, all of this makes us worse decision makers and less efficient when we attempt to complete activities simultaneously than we would be by focusing on doing them in serial - there have many many productivity studies that bear this out. Multitasking is an illusion and there are plenty of good reasons to stop buying in to it.

- Richard

Thursday, 12 February 2015

The gulf between the American public and the scientific community is widening, report indicates

Scientific literacy is an increasingly important requirement to be an informed participant in any modern society. It’s difficult to imagine how you could consider someone informed who has very little understanding of science in the age we now live.

It should be alarming, then, that the Pew Research Center in collaboration with the American Association for the Advancement of Science (AAAS) have released a report recently, based on a pair of surveys conducted on the American public and scientific community that reveals that citizens and scientists see a host of science-related issues in a completely different light.

57% of the general public say that GM foods are generally unsafe to eat; by contrast, 88% of AAAS scientists say GM foods are generally safe.

34% of the American public say science has mostly had a negative effect on the quality of food.

31% believe science has had a negative effect on the quality of the environment today.

24% do not believe government investment in basic science research (71%) pays off in the long run.

You can read the report in its entirety here. We await the promised follow-up report, due at the end of this month. We discuss this issue and others on the 1st February edition of our show, which you can view here.

- Richard

Wednesday, 11 February 2015

Show Notes for Episode 11, 8th February 2015

The running order and show notes for episode 11 of The Wonder of Stuff...

Ross talked about the SNARC effect in Chickens;
Richard talked about a possible cure for peanut allergies;
John talked about changing speed of light in a vacuum;
- John

Sunday, 8 February 2015

Genetically modified mosquitoes

On episode ten of WoS which aired on 01/02/2015 we discussed genetically modified mosquitoes (you can view the YouTube video here).

Oxitec are the British company behind the projects we discussed and they have a page with more on the science behind how they incorporate the new gene's into the mosquito’s own DNA, from where it is then copied into every cell of the mosquito’s body. You can find this here.

The petition against releasing the mosquitoes which Richard talks about in his segment now has 147,536 supporters and can be viewed here.

The petition contains some inaccuracies alluded to in the video, which you can see for yourself.

- Richard