earth-moon fireman’s pole | juno images from jupiter

earthmoonpole

A five-year old asked on xkcd: If there were a kind of a fireman’s pole from the Moon down to the Earth, how long would it take to slide all the way from the Moon to the Earth?

First things first, it’s impossible to place a pole between the moon and the earth because of the two bodies’ constant movement. There is no stability whatsoever between the two end points of the pole. Then there are the scientific impossibilities–can’t slide because there’s no gravity between the two points, the relative rotation of the earth and the moon, the moon’s equivalent ground speed. Then there is the effect of sonic waves and the atmosphere. Plus the adventurer will gather so much speed coming towards earth that a huge giant mattress is needed to cushion the sudden stop.

Basically, too many variables.

But what if we froze the earth and the moon, and all of time except for our adventurer. It should be an easy calculation:

timedistancespeed

Assume we use the average lunar distance of 384,400km. The issue is, what do we use as speed? The earth’s gravitational acceleration is 9.8m/s, but that isn’t very helpful.

Anyway the answer.

Spoiler below.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

There is no answer.

Hmm. Too many unknowns.

So I don’t end a post with such an anticlimax, here’s a link to pictures of Jupiter that the spacecraft Juno has sent back. (All images below ©NASA.)

The familiar red spot, taken when Juno flew just 5,600 miles above it in July 2017:

junojupiter01

Then there’s this of Jupiter’s south pole, which is not visible from earth. It’s like the inside of a crystal:

junojupiter02

Cloud systems in the northern hemisphere:

junojupiter03

More at vox. Vox also reports that the mission is approved until July 2018 and if it doesn’t get extended, Juno will be abandoned and left to fall and get burnt up by Jupiter’s atmosphere.

growing vegetables in antarctica

Blick ins Gewächshaus vor der Ernte

I know hydroponics is the future of agriculture, if we have a chance of keeping our species and the planet in good shape. I was glad to read about a group of German scientists who successfully grew greens, radishes and cucumbers in Antarctica.

Of course they didn’t grow the veg outside, in sub-freezing temperatures. They use optimised lighting and temperature conditions and a closed water system in a greenhouse next to the research station. No soil involved. Take a look at the flickr set of the project, called EDEN-ISS. They expect to be able to regularly harvest 4-5kg of vegetables each week.

The idea isn’t merely to grow vegetables for the scientists at the research station, this is an experiment to see whether it’s possible to grow vegetables on the moon, on Mars, and under harsh climate conditions on Earth.

how far can the eye see

ynp205moon

How far can the human eye see?

Think about it.

What’s the answer?
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

I saw this on an r/askreddit thread that asked: “What’s the smartest thing you’ve ever done?”

seeingmoonreddit

Duh.

Probably further, because some stars are way, way past the moon. The andromeda galaxy, located 2.6 million light years away, is the furthest object visible with the naked eye under the right conditions.

Those military higher-ups were probably asking how far can the human eye see on earth and with the ability to see details. Or the more common question, how far can a human eye detect a candle flame? The quickest answer from googling is 48km. Researchers at Texas A&M university say it’s less than that, at around 2.5-2.8 km.

It’s surprisingly hard to test, because there are assumptions and external variables. Do we take into account the earth’s curvature? At around 3km it’s less significant than 48km. How about light pollution? Even in completely rural areas, are we seeing the candle flame absent light from the stars and the moon? How about under conditions of absolute darkness?

I can see why there was a discussion.

single atom photograph

epsrcwinner01

via giz, the Engineering and Physical Sciences Research Council (“EPSRC”) just announced the winner of its annual photography prize, which goes to David Nadlinger of Oxford University for a photography of a single strontium atom. The atom was excited by a laser, absorbs the energy, re-emits the light, and was held stationary by electric fields. The process occured sufficiently quickly for an ordinary camera to capture.

epsrcwinner02

Zoom in and the atom may be seen clearly. Images © David Nadlinger.

There were over 100 entries to the competition, in 5 cutely named categories: Eureka & Discovery, Equipment & Facilities, People & Skills, Innovation, and Weird & Wonderful.

The ESPRC was formed in 1994 after the SERC was split into reserach councils responsible for engineering & physical sciences, particle physics & astronomy, and biotechnology & biological sciences. Every scientist in my university cohort who went beyond first degree knows the SERC very well.

eat more chocolate, win a Nobel prize

chocnobel

This came from a reddit thread about a paper presented in the New England Journal of Medicine in 2012 entitled Chocolate Consumption, Cognitive Function, and Nobel Laureates. The paper needs to be accessed from authorised (aka paid) sources but it was extensively discussed by Stanford professor Sanjay Basu in his public health blog. The NEJM paper claimed that:

chocolate consumption enhances cognitive function

based on the correlation between chocolate consumption and the number of Nobel Laureates in a selected sample of countries (r = 0.791 P < 0.0001). According to the authors, this is due to the beneficial effect of the flavanols contained in cocoa.

Prof Basu rightly called the paper:

the worst example of medical statistical misadventure we’ve seen in years.

Researchers from Belgium wrote in the Journal of Nutrition and sided with Prof Basu in dismissing the paper. They pointed out that this is a classic case of ecological inference fallacy, where conclusions about group data is drawn from individual data with no relationship between group and individuals presented. In other words:

the observed correlation is in fact based on country-averaged chocolate consumption and not on the actual consumption of Nobel Laureates themselves.

The two sets of data points have no commonality whatsoever. Chocolate consumption was over a 2 year period for the entire country, whereas the count of Nobel Laureates was over time. Some of the said laureates weren’t even alive during the 2 year chocolate consumption period. The Belgian researchers found an even higher correlation (r = 0.82 P < 0.0001) between the number of Ikea stores and Nobel Laureates in a country, a correlation they used to illustration the fact that it’s so meaningless that it’s laughable. All correlations do is to give a numerical relationship between data points, it’s up to the researcher to give meaning to the correlation. In some cases, there is no meaning.

The interesting observation is how the original paper even got through peer review into a journal. Was it meant to be ironic or humorous? Who knows. The research design comes into question. I’ve always thought of research as following the process of: do experiments -> make observations -> arrive at conclusion -> propose theory. This is the most traditional research method, especially in the natural sciences. In talking with mm, her professor seems to take the opposite approach: predict desired outcomes for theory -> design experiment/study -> get results that confirm theory. Seems to be a common method in social sciences.

researchmethods

There are different names for these research designs. Bottom up research is called exploratory or inductive research. The opposite, the top down approach, is called confirmatory or deductive research. Which is better, which more effective, that’s a difficult question to answer. It depends on the overall goals and the specific topic, I guess. Doing a lot of experiments lead to more new knowledge. Knowing what results you want may lead to more effective experiments but may not advance the overall knowledgebase. I don’t know the answer. All I know is, eating more chocolate does not, unfortunately, lead to winning Nobel Prizes.

why we miss things in front of us

Here’s an interesting NYT article about how we miss objects in front of us.

toothbrush

The challenge: find the toothbrush in this messy bathroom. I saw the black one straightaway, which apparently made me an atypical person. Most people notice the smaller one first, and actually I had trouble finding it even after reading that there is a smaller one. The reason behind most people’s reaction is due to size and expectation. People expect toothbrushes to be a certain size and will look for an object that size, so our brains process the information accordingly. This is also why we may miss something that is right in front of us in a phenomenon known as inattentive blindness. We expect things to be in certain places and ignore if they are not. Remember the invisible gorilla? Christopher Chabris was a co-author:

[w]hat we pay attention to is largely determined by our expectations of what should be present.

So why did it take me less than one second to see the large toothbrush? One of the commenters on the mefi thread mentioned hidden object games. Bingo! Glad that all the time spent playing ravenhearst ddin’t go to waste.

the most important part of learning is forgetting

learningforgetting

Mum has expressed her frustration at me numerous times when my answer to her questions is constantly “I don’t know.” Some questions are IMO unreasonable expectation that I am a cross between Superman and google.com. How did the tradesman get in through the main gate? How much should she pay the part time helper? Does abc shop sell xyz brand of whatever? Sometimes I’m expected to have a 10TB hard disk in my brain. What was that $50 transaction on her bank account 6 months ago; how much did the tv originally cost; when did so-and-so visit us.

What she has difficulty understanding or unwilling to make the effort–because it’s sooooo easy to ask a question and push the responsibility to someone else–is I archive a lot of information I process. Once the receipt is filed away, I no longer need to remember how much the tv cost. I may remember where it was purchased, simply because there are only a limited number of electronics shops. What I do retain, is where the receipt is so I know where to find it if necessary.

Although I’m not an AI entity (or are we all living in a computer simulation?) this approach to storing information is behind a new idea of how deep neural networks learn. Like how alphago learned how to play go and won against the European champion but slightly different.

There is a long article at quanta magazine that I’ve been trying to read for a few days that is sort of related to this. I still only have a tenuous grasp of the theories, it’s quite technical.

Naftali Tishby, a computer scientist and neuroscientist from the Hebrew University of Jerusalem, proposed that deep neural networks learn via something he called information bottleneck where the AI iteratively discards irrelevant information and retains the important ones. This theory is not only relevant to machine learning, it may also shed light on how human brains learn and retain information. It’s all about filtering and archiving. Or as Professor Tishby said:

the most important part of learning is actually forgetting.

museum wars

Thanks to my friend N (who works at the Smithsonian, how cool!) for linking to this.

The Natural HIstory Museum and the Science Museum had a twitter museum-off the other day. It started when someone asked who would win in a battle between the two. The social media managers at both places had a field day.

museumwars1

First shot fired by NHM, and a quick return by SM. It got worse from there, when random ammo like vampire fish, polaris missile, cockroaches, wellies, dragons, submarines, fleas, balloons were brought out. When NHM fired a tweet with locust, SM fired back with pesticide. All were museum exhibits.

museumwars2

Meanwhile, the V&A were sitting pretty.

Of course, civility returned. We’re British after all. Compliments all around and each took the opportunity to mention more of their interesting exhibits. The entire silliness episode here.

yay, science

The spring issue of the Imperial magazine arrived in my postbox. So rare to receive an actual paper magazine nowadays. Lots of interesting reading.

you are your brain — the feature of this issue talks about how it is our brain that makes us who we are, it is

icmag42brain

the storehouse of personhood – of emotion, thought, memory – of all the things that make us the individuals we are

Several departments at IC look at how the brain works. Neuropathology looks at the structure of the brain; the Intelligent Systems and Networks group in the Department of Electrical and Electronic Engineering studies how electric current from neuron to neuron which is how our brains process information; and the Centre for Neuropsychopharmacology considers the changes in our brains when under the influence of psychedelic drugs. The research carried out by all these scientists go towards improving our knowledge of how the brain works, and more importantly, how we can better diagnose and treat brain disorders. For instance, a team at St Mary’s has developed an infra-red scanner that checks for blood clots and has a 90% accuracy in a hospital setting.

standard matter 3.0 — this article about theoretical physics and the large hadron collider at CERN is a little above my head. I’m fascinated by it, yet I always find theoretical physics (and chemistry) difficult to fully grasp.

icmag42matter

My takeaway is that there are 12 fundamental particles (including quarks and leptons) that are subject to 4 fundamental forces of the universe (eg electromagnetic). This is the Standard Model which has been accepted since the 1960s and confirmed by what the large hadron collider has found: nothing new. The concept of particle physics is so vast and so much of it is still unknown. Professor Henrique Araujo:

We know a lot about five per cent of our universe, and almost nothing about the other 95 per cent

blockchain — the price of bitcoins reached US$3500, so $100 invested in bitcoins in 2010 will be worth millions. Who was to know? Bitcoin has been lauded as the future, but the image is poor as it is the currency of choice for hackers and blackmailers. The technology behind bitcoin, blockchain, is sound and researchers point out, secure since all transactions are distributed amongst the entire network without a central server. Every computer in the network stores and authenticates the transaction in real time,

but once it is added, a transaction record is permanent and cannot be changed – it’s ‘immutable’ in blockchain-speak – because altering it would require access to millions of separate computers

Outside of the financial services industry, uses include any item or commodity that is distributed globally. There was an article in the NYT about how bananas are shipped to new york and this will be a good use of blockchain technology. At every step of the way, from the farmer who grew the banana to the ship that carried the banana to the supermarket that has the banana on its shelves, every party registers information about the banana and it makes it easy to collect and retrieve records of the banana’s production. Important if something goes wrong along the way, or someone is trying to commit fraud.


The magazine isn’t all about academics. Articles about student activities and alumni news too. Apparently alumni can purchase a lifetime membership for £40 and use all the union activities including the bar and join clubs and societies. If I’m back living in London and near South Ken I may do that. I should check out King’s alumni membership too.

hyde park relays — the biggest student race, a 5k team relay with representation from IC as well as other universities. Costumes optional. Past racers include Dave Moorcroft and Seb Coe, who helped Loughborough to victory.

the gliding club — formed in 1930, it’s the oldest gliding club in UK universities. Club secretary Amy describes the sensation when launching:

you go from 0 to 60 mph in a few seconds. And from the canopy it looks like you are going straight up into the air

I don’t even want to go parachuting but there’s something peaceful about gliding that is appealing.

make fire with water

24shiny

Sis is a bit obsessed with survival gear, and it’s spread to me. I have an emergency go-bag in my wardrobe, small survival stuff in an altoid tin and a couple of knives in my drawer. My amazon order history includes MRE packs and firestarters.

Life Below Zero has been showing at lunchtime and there’s Glenn showing us how he makes fire without matches.


So I was interested in this video showing how to make fire using a ziploc bag and water. Although the video seems a bit too good to be true, the process looks possible with strong sunshine. The same idea as starting a fire with glasses may be. The most useful tip I learned is to wave the bundle around after the ember is formed.

numbers are fun

traincups

I found an absolutely fantastic youtube channel numberphile, which posts videos about science and maths in an interesting and fun way.

This one with Professor Tadashi Tokieda, Director of Studies in Mathematics at Trinity Hall, Cambridge where he explains why train wheels are shaped the way they are so they can go around bends safely. It’s all to do with large circles travelling longer distance per rotation than small circles. He illustrates it using disposable plastic cups taped together. What an engaging professor, he made it so easy to understand.

hidden not hidden

Car was telling me about hidden figures, an inspirational film about african-american women who worked on the space program in the 1960s. It’s so important, especially now, to show the achievements of women and minorities. As jason kottke said

You watch this movie and think, how much higher could the human race have flown if women and people of color had always had the same opportunities as white men?

Not only in the past, it’s a current problem too.

nasawomen

And right on time, lego announced that they will release a set of 5 female NASA scientists including: scientist Katherine Jenkins; computer scientist Margaret Hamilton; astronaut, physicist and educator Sally Ride; astronomer Nancy Grace Roman; and astronaut and physician Mae Jemison. Lego solicits ideas all the time and some of the ideas are put into production. About the women of NASA idea:

As a science editor and writer, with a strong personal interest for space exploration as well as the history of women in science and engineering, Maia Weinstock’s Women of NASA project was a way for her to celebrate accomplished women in the STEM professions.

paper centrifuge

papercentrifuge

This is so cool. Scientists at Stanford developed a human-powered centrifuge from bits of paper and string.

The idea of spinning something quickly via a piece of string is an old idea. Very similar to how survivalists teach us how to start a fire. The Stanford centrifuge can achieve

spinning speeds of 125,000 revolutions per minute (RPM), and exert centrifugal forces equivalent to 30,000g

The reason for developing this centrifuge is for separating blood samples in the field for testing, especially in third world countries. Conventional centrifuges are bulky and require electricity. This one can be constructed from paper, wood, plastic, fishing wire.

I love stories like this. Low tech solutions that make the world better.

welcome home Major Peake

After a 6-month stay at the ISS, Tim Peake came back to earth.

The first UK astronaut to spacewalk; the second astronaut to run a marathon (London, which he completed in 3.35). I’ve been following him on the news, on twitter and flickr. He’s safely back on earth now, but not before a final tweet from space:

Beautiful pics on his flickr feed. Aside from the marvel that is seeing the Earth from space, there’s his keen eye too. It’s good to be reminded of how beautiful our planet is.

The Earth:
Planet Earth

Aurora over Canada:
Aurora masterclass

Sunlight reflecting on a Himalayan lake:
Stunning colours

p.s. all pics copyright Tim Peake ESA/NASA, from Tim’s flickr.

science & engineering news from IC

I get the Imperial magazine which they send out to alumni and people they manage to get onto their mailing lists. The most recent issue [pdf] is quite interesting reading. Technical focus of course, since it’s IC.

There’s an interview with the new President, Professor Alice P. Gast, the first woman and the first non-Briton to be the head of IC. There’s news about the new White City site (the old BBC Wood Lane buildings). A recap of the 2015 festival and other alumni news.

A few articles were worthy of detailed reading.

Campus Life: Potential Energy is about a PhD student doing research into converting waste products to biofuels, who also doubles as co-founder of a startup that provides regions in India with clean energy–from solar power to equipment that converts agricultural waste to electricity. She was the first winner of the £10,000 Althea-Imperial prize for women students.

A team of IC engineers have developed a small sensor that syncs with an app to enable users and their medical practitioners to monitor their health. The team won a $120,000 Distinguished Award at X-Challenge, an international competition for medical sensing technologies. The AcuPebble is the size of a pound coin and sticks to the user’s chest or back, listening to heart-rate & breathing, and sending the results to an app.

From this acoustic signal, a variety of physiological and disease related parameters can be obtained, such as lung volumes, breathing rate, heart rate that are useful for diagnosing several medical conditions.

timetravelclock

A short article celetrated the 100th anniversary of Einsten’s general relativity, which theoretically makes time travel possible, by asking several alumni and professors what they would do with a time travel machine. The answers were pretty boring and predictable: they’d all go back in time to visit certain specific points in history. One said to visit Nikola Tesla; another said he’d take Leonardo Da Vinci to the 21st century; someone namechecked Maxwell and Newton. Hmm, not a very original bunch, IC people.

p.s. I think I get the King’s magazine too, although it’s now an app which means they prefer we fetch it ourselves.

on the #timhunt incident

My niece was complaining about her Chemistry teacher so I offered to give her some Chemistry help over the summer holiday. She didn’t really say yes or no; can’t blame her, who in their right minds will voluntarily do schoolwork during the summer holiday? Anyway, I’ll have to read up on the topic if I do need to help her, I’d all but lost my chemistry knowledge. Why did I leave my research job? It was boring and there didn’t seem to be a good career progression.

A dinosaur masquarading as a Nobel Laureate made stupid comments about “girls” falling in love and crying when criticised and was asked to resign from his post at UCL. I agree with the outcome, and even though I should feel sorry about the speed and ferocity of his treatment by social media and his employer, I don’t. He claims it was a self-deprecating joke and he’s been hung out to dry but again, no sympathies.

People are allowed to express their opinions in private; this is the basic tenet of a free world. But he wasn’t in private, and as a Nobel Laureate, he is a role model and speaking from a position of eminence. Did he think before he spoke? Obviously not. Did he think what he said was wrong? From his half-hearted apology afterwards, no. He only apologised more profusely after the backlash. It’s another case of being sorry that his remarks were heard by journalists.

Here was someone who took credit for work done by scores of undergrads, postgrads and postdocs under his supervision, and yet his attitude towards 50% of the population is so backwards that I wonder at atmosphere in his labs. Then again it’s likely that his labs had around the national average 12.8% women (oh sorry, Prof Hunt, “girls”) so it’s not like they count, right.

Lots of commentaries, tweets and opinions about this incident. Women scientists started posting pictures of themselves looking #distractinglysexy. Other prominent male scientists rushed to his defence. Even Boris Johnson chimed in. Astrophysicist Dr Katie Mack summed it up nicely:

scienceresearch01 scienceresearch02

In other news, scientific research is bizarre. In Ways of Knowing, photographer Danier Stier took photos of actual research going on at actual research institutes. He says,

we get the wrong idea of science when we look at something like National Geographic, we think of lab coats, high-tech equipment—the realities couldn’t be more different

Hmm, there aren’t that many women in the photos either. Credit to them that they’re not crying.

coke bio cooler

The Coca-Cola Bio cooler from Leo Burnett Colombia on Vimeo

It’s beginning to get oppressively hot, over 30°C. I’ve escaped to parents’ place because theirs is more open, with an occasional breeze and I don’t want to blast the air-con all day at my flat.

Some places in the world get very, very hot. And at some of these places, there is no electricity. No air-conditioning, no fans, no fridges.

So Coca-Cola just invented a cooling device that doesn’t need electricity. Developed by advertising agency Leo Burnett in collaboration with the International Physics Center, it uses natural technology: plants grow at the top of the container, when watered excessively the water trickles down the soil and because of the high temperature, evaporates and mixes with other materials into an unnamed gas. Mirrors inside the contained space condense the gas back to liquid, triggering a cooling effect (remember the first law of thermodynamics).

The device is placed the village of Aipir in Columbia, where temperatures reach 45°C, there is no electricity and villagers have to trek 12 hours to get ice. They press a button and hey presto! chilled coke cans.

Cynics would of course say the village probably need to have ways to cool their staples like meat, vegetables or milk, moreso than a gimmicky (albeit colourful) box that dispenses a high sugar unhealthy drink. The technology hopefully can be used on more practical purposes but as adweek observed,

this is about bringing people a modest luxury that’s normally out of reach

Very often we forget this, that things we take for granted in the first world have a different meaning to people who are less privileged. Lots of debate about how unhealthy coke and other soft drinks are, but for these Columbian villagers, it’s something that brings a smile to their faces.

TIL people think the sun goes around the earth

orrery

Hard to believe that so many people believe the sun revolves around the earth. While I had to stop for 10 seconds to remember the correct order of the planets (Jupiter comes before Saturn, I always get confused; I’m good with the rest), it’s a little shocking to learn that there is a gap in education or belief system in some pockets of the population. Wow.

I also learned a new word: orrery, which means a mechanical model of the solar system. The epitome of steam punk art, if you asked me. I spotted this post via flipboard, of a beautiful orrery designed and handcrafted by ken condal.

If only we can show this to the people who think the sun goes around the earth, hopefully we can reduce the ignorance.

geoguessr

Spent a chunk of the weekend playing geoguessr, which I’ve bookmarked since it came out wanting to try it. Basically it drops you at a random google street view location, you can move around, make your guess on the map at the side and the game awards points based on how close your guess is. Sometimes it’s easier, with street signs, buildings even buses as clues, sometimes it’s just a dirt path with vegetation all around it. It’s an honours game, and you’re not supposed to google but, well. So here’s a typical game, you get 5 locations.
geoguessr01
location 1: a busy pavement-less road, dry vegetation and what looks like a goat at the side of the road
analysis: right-hand drive, seems to be a hot location so not UK or Ireland. No pavements so probably not Australia. More likely to be South Africa. Further down the road there is a Toyota dealer with partial name. At this point I did google
result: Botswana, not SA

 

geoguessr02
location 2: holy cow, coral in the middle of the ocean
analysis: no idea, so I guessed the great barrier reef

geoguessr03
result: somewhere in the gulf of mexico. At least I got more than zero points

 

geoguessr03
location 3: straight single-lane road surrounded by farm, small road on the left with US-style mailbox leading to several houses and a barn
analysis: somewhere in the middle of the US, it’s flat and farm country. I guessed Wyoming
result: it was Idaho

 

geoguessr04
location 4: chinese-styled white arch with red curved-roof building behind it, tourist buses parked in front
analysis: I can read the writing on the arch, and I’ve been to this place

geoguessr06
result: chiang kai shek memorial, taipei. I was 100m out because I didn’t put the pin exactly where the street view vehicle was

 

geoguessr05
location 5: corn fields, just like what we used to see on the X-files
analysis: mid-west USA, I guessed Indiana
result: southern Illinois

 

geoguessrscore

Total score 17,587. I think the max is around 30,000. My highest score so far is 24,989. It’s not all guessing, and some tips include looking at the weather, vegetation and soil if it’s in the middle of nowhere. Whether it’s right- or left-hand drive (if there are no cars road markings may help) is a good clue, as are road signs. I was dropped in a snow covered road surrounded by trees and thought it was Canada until I saw a beat-up Volvo and road maintenance signs that didn’t feel like Canada. Correctly guessed it was Sweden. It’s also useful to know where street view has visited: most of Africa, the middle of South America, China, Middle-East and the eastern part of Russia are out.

It gets slightly boring after about 20-30 games though, when it’s yet another empty road with nothing around it but scenery — I don’t have sufficient interest in plants or soil to spend time figuring out that reddish soil means either Australia or Mexico, or conifers suggest a colder region.

aquaponics

aquaponics

Sis and I went to a talk about growing your own vegetables sponsored by the slow food movement. There were 4 speakers talking about their experiences, as well as what they are doing in schools to help kids learn and grow their own fruit and vegetables. There was one speaker who introduced us to the concept of aquaponics which combines raising fish (or shrimp or the like) and a soil-less vegetable planting system. The waste water from the fish tank is pumped into the vegetable growing tub, where the plants absorb nutrients and clean water pumped back to the fish tank. When running, it’s a self-sustaining system.

I remember when I used to keep tropical fish how my window plants really thrived when I watered them using the fish water. Makes sense. Aquaponics systems can be set up in a small area in the garden, on a balcony and even on a very small scale indoors. Here’s a video made by the University of Hawaii.

It doesn’t seem impossibly difficult, just need the space, the parts and some tools. I’d much rather set it up outdoors, need lighting and a system to reduce humidity indoors. The sort of fish can be edible, like catfish or tilapia, or just plain goldfish for those who are squeamish about killing fish. Plants are usually leafy lettuce, pak choy or herbs like basil and mint. Sounds awesome.

i track myself

OMG, why has it taken me so long to find it. I so have to start doing this!! via bb, over at quantified self, Alexandra Carmichael explains how she keeps a record of 40 different things in her life every day, and what she’s learned about herself from studying the data.

I track these things about my health and personal patterns every day:

– sleep (bed time, wake time, sleep quality, naps)
– morning weight
– daily caloric intake (each meal, total calculated at end of day)
– mealtimes

  • mood (average of 3 positive and 3 negative factors on 0-5 scale)
  • day of menstrual cycle
  • sex (quantity, quality)
  • exercise (duration, type)

  • supplements I take (time, dosage)

  • treatments for vulvodynia (a chronic pain condition)
  • pain of administering the vulvodynia treatment I take (0-5)
  • vulvodynia-related pain (0-5)
  • headache,nausea (0-5)

  • time spent working, time with kids

  • number of nursings and night wakings (I’m a mom)
  • weather
  • unusual events (text)

The mood factors I measure every day are:
1. Happiness
2. Irritability
3. Calmness
4. Sadness
5. Feeling beautiful / self-love
6. Feeling fat / ate too much

She used google spreadsheets initially, and this came out of a project of setting up cure together, a platform for open source health research.

I don’t think it’s difficult to set up a spreadsheet for this, and in a way I’m kinda sorta tracking some stuff in different places. I can see myself tracking things like:

  • time I wake up, leave for work, arrive at work, arrive back home
  • meal times and what i ate
  • calorie intake and expenditure (something that daily plate does well)
  • exercise — daily plate again, plus I now record my runs on both nike plus and twitter
  • weight
  • blog posts made
  • google reader posts read
  • books read
  • words written
  • IM convos
  • emails read and answered (home and work)
  • number of facebook requests received

Alexandra analysed her data by looking at correlation between moods and certain activities like exercise. I can’t quite see myself tracking moods, cos it’ll be “meh” almost all the time. My motivation for tracking will be for the sake of getting data and putting them into pretty graphs.

And no, I won’t be tracking
– sex (quantity, quality)

periodic videos

via kottke, a series of absolutely fantastic short videos on all 118 elements of the periodic table, presented by the Chemistry professors at the University of Nottingham. Never has the chemistry of elements been so interesting and so inspiring. That, and Professor Martyn Poliakoff’s big hair.

One of the commenters suggested that they put them all on a DVD. Oh yes, I’d so buy it. Watch all 118 videos here.

do i know my elements?

quiz
via the always interesting kottke, a periodic table quiz. Only in this one we have to enter the long name instead of the elemental symbol. Some of the spelling I simply couldn’t get. It’s like in those “name the European countries” quiz when I can never spell Liechtenstein correctly.

88/118 isn’t bad, considering they included 112-118, the Unh series. Okay, this was the second or third time around, I did a little studying in between.

I have to say, I’ve never needed to use the periodic table after my first degree, so there really isn’t much use knowing the elements.

chemical colours

via wired, an experiment that lava lamps will get jealous of.

Non-science readers should stop here and play the video again. Science geeks read on.

*

The experiment is an example of an oscillating reaction and is attributed to Thomas Briggs and Warren Rauscher who first demonstrated it in 1973. No wonder that it’s called the Briggs-Rauscher reaction. It’s a combination of 3 solutions:

  • 410ml 30% hydrogen peroxide diluted to 1l — it’s been far too long since I’ve done chemistry I’m not even going to try to calculate the molar equivalent
  • 43g potassium iodate KIO3 and 4.2ml conc. sulphuric acid diluted to 1l
  • 16g malonic acid and 3.4g of manganese sulphate mixed with 3g soluble starch solution, diluted to 1l

Solutions A and B are mixed in a beaker and then solution C added while stirring. The initially colourless solution will become amber almost immediately. Then it will suddenly turn blue-black. The blue-black will fade to colourless, and the cycle will repeat several times with a period which initially lasts about 15 seconds but gradually lengthens. After a few minutes the solution will remain blue-black.

The rationale is that several reactions happen at the same time. Or more specifically, two competing reactions happen at the same time that uses up material at different rates, so the concentration of iodine and iodide ions (I) produced during the reactions fluctuate. Iodine produces the amber colour, hydrogen peroxide bleaches everything and iodide ions reaction with the starch to form the blue-black solution.

Sigh. I tried to read through the chemistry but lost interest. Damn.

the flash drive of my mind

Relating to yesterday’s post and an example of how my thoughts flow in strange directions, here’s some mind babble about information explosion, email addresses and human-robot relationships.

We are surrounded by information. Lots of information. Ever since I switched to google reader I’ve been spending a lot more time than before reading feeds. Comparatively I shouldn’t have enough feeds for rss fatigue to set in — around 60, of which some are to keep track of friends who hardly post. That’s pretty manageable, even though I dread to think what I’d have to go through if I went on vacation for 2 weeks.

It’s not just the sheer amount of information around us, it’s the speed at which it’s coming at us. We’re literally bombarded 24/7 by an unending stream of news, or stuff on digg, or pictures of the newest gadgets. We don’t have enough room in our brains and we’re remembering fewer and fewer basic facts these days:

This summer, neuroscientist Ian Robertson polled 3,000 people and found that the younger ones were less able than their elders to recall standard personal info. When Robertson asked his subjects to tell them a relative’s birth date, 87 percent of respondents over age 50 could recite it, while less than 40 percent of those under 30 could do so. And when he asked them their own phone number, fully one-third of the youngsters drew a blank. They had to whip out their handsets to look it up.

It’s true. When I left OldJob I printed a copy of my personal Outlook address book but I couldn’t take the entire company email database of course. Sending emails to ex-colleagues became less intuitive; I actually had to think about it. Fortunately, like most corporate emails the external emails were mainly firstname.lastname@company.com; but there were a few exceptions I had to specially remember.

It’s even worse for friends’ and family’s email addresses. I can remember the ones I email regularly, but the rest I rely on gmail’s autofill feature. I can’t remember anyone’s birthdays apart from the most important people; and forget about addresses — 90% of letters I send via snailmail are to pay bills at places I can’t pay online. Every memory seems to be archived, it’s now a matter of remember where the information is stored rather than the information itself. It’s like I have flashdrives hooked up to my brain that I need to download and upload memories to.

I feel like I’m developing hardware. The mbp is almost an extension of my body, it is more important than the tv, or any sentient or insentient entity in my existence.

AI researchers were talking about the possibility of sex between humans and robots in five years and marriage by 2050. With humans becoming more robot-like and robots becoming more lifelike, it’s a matter of time before the two species merge. There’s enough sci-fi stories and movies about this that it’s not as whacky of preposterous as it first may seem. Yes, it’s icky and the exact ethical implications haven’t been thought through, but pesonally I don’t want to rule it out. Some part deep down inside me can see how the idea may be attractive.

Robots can provide a tremendous amount of comfort. For example look at the Ri-Man that was developed at the Bio-Mimetic Control Research Center in Nagoya. It’s a robot that is intended to be a nurse’s aid, to help pick up patients at the hospital. But with artificial intelligence that allows the robots to learn emotions and even develop personalities, who’s to say that there is a limit to the degree and type of comfort / companionship that a robot can offer? Think real doll [nsfw].

robot ri-man

At least, robots can be programmed not to a) engage in or b) feel hurt if they’re told that they are engaged in annoying behaviour. Which leads me back to email addresses, a reminder to think before forwarding those cute / “send to 10 other people or you’ll die” / “send to 10 other people and you will meet the love of your life” emails because:

  • may be it was cute once, a very long time ago when people only read one newspaper; but not after you’ve seen it 457 times
  • nah, a hippo with a baby chimpanzee on its back eating a banana ain’t cute
  • by the time I get one, the fwd:fwd:re:re chain is so long, I wonder why it took me so long to get it … am I not popular enough? [/sarcasm]
  • if I were a spam harvester I’d wet myself — all those hundreds of email addresses of real people
  • baby elephants and polar bears cuddling with an Eskimo child ain’t cute … really
  • most people are too embarrassed to tell their cute-email-sending friends to buzz off (um I don’t have this problem, I tell them to buzz off)
  • they’re not just sending me an email, it’s a AYCE malware party — open an attachment, get viruses, trojan horses, spyware, worms compliments of your (shouldn’t it be ex- by now?) friend

Is it a stretch to see why a customised robot may be a viable alternative?

I’m right brained, huh

I’m a straighter-than-a-straight-arrow person who is usually logical, organised and punctual — not surprising for someone who has a science background and works in a technical field.

And yet I can write a little. It’s been a source of puzzlement for me. I mean, I can’t draw to save my life and the way I react to art is an either/or: it’s pretty, or it’s not.

This all has to do with left and right brain behaviour.

left brain
uses logic
detail oriented
facts rule
words and language
present and past
math and science
can comprehend
knowing
acknowledges
order/pattern perception
knows object name
reality based
forms strategies
practical
safe

right brain
uses feeling
“big picture” oriented
imagination rules
symbols and images
present and future
philosophy & religion
can “get it” (i.e. meaning)
believes
appreciates
spatial perception
knows object function
fantasy based
presents possibilities
impetuous
risk taking

 

I found a couple of simple tests. The Hemispheric Dominance test tells me that I use my left brain more — though it was 10 left and 8 right, closer than expected. The Art Institute of Vancouver confirms that — I got 56% left and 44% right, which is almost the same split.

Now to turn everything on its head. Instead of consciously doing tests that arguably I can influence the result, here’s one I came across via kottke: a visual test for left- or right-brainedness. It can get dizzy looking at it for a long time, so I’ll put it under the cut.

Look at the dancer. Do you see the dancer turning clockwise or anti-clockwise?

If clockwise, then you use more of the right side of the brain and vice versa.

dancer

Apparently most people would see the dancer turning anti-clockwise though it is possible to try to focus and see if she changes direction.

For the record, I see her turning strongly clockwise. Meaning, I’m right brained. Does it mean that my perception of myself may have skewed the test? That I’d consciously or subconsciously pick the safer, left brain answers because I thought “that’s me”? But when given a visual test where I can’t control the results I end up being right brained? Looking at the traits, I’d say I’m some of each, which again is not surprising.

Hmm. I don’t have a split personality, but in a way I’m glad that there’s some evidence that I can be creative.

80-20

I was chatting with Car (literally just 5 minutes ago) and she was telling me about the books I should be reading. I said I have little time for reading right now, cos of the 80-20 rule — I’m now at the time-consuming 20% part of the Great Website Redesign project.

She said, and I’ll quote:

80-20 rule? is that something you’ve made up in your anal little mind? lol

Oh my friend, it’s real alright. It’s called the Pareto Principle and was used originally to describe the distribution of wealth. In project management terms, it means that 80% of the work uses up 20% of time / resources.

As anyone who’s spent splodges of time putting the final touch on any project — baking, planning a holiday, building an office block — it’s the last litty bitty details that take up most time, energy and frustration. In terms of the website stuff, it means I’m spending time on the css details before moving onto the static pages.

I tried to explain all this, and the response was still:

car: I think that’s something you’ve made up
me: HA! it’s on wikipedia
car: oh whatever…it simply justifies your need to spend hours changing the color and margins of your website. LOL

Who’s a skeptic now? (Or she’s pulling my very anal legs.)

greatness@home

I used to shut down my computers every night and reboot the next day. At work I’m in the habit of logging off every Friday. But some people prefer sleeping to shutting down. Personal preference I suppose.

In cnet today there was (yet another) mac vs PC debate and the talkback turned to uptime of weeks, months, years. So what to occupy the CPU during idle time? Enter distributed / grid computing, where people volunteer the use of their computers’ CPU when they’re not using them.

I looked at folding@home and seti@home. Both involve running work unit tasks either in the background or as screensavers. In a way the network of personal computers combined is as powerful as a supercomputer. Complex problems, such as the human genome project, finding a cure for AIDS and looking for extra-terrestrial lifeforms, that require massive amounts of calculations are split into smaller calculations and farmed out to millions of computers around the world. Wired magazine compared it to someone needing to label 10,000 envelopes. Do they do it themselves, or ask 100 friends to label 100 each? Which one is more efficient?

Sounds good. And an opportunity to contribute towards scientific research.

But I haven’t downloaded the client and joined the fun. I need to find out more about how much power it uses, and if I leave the mbp on for extended periods of time, even idle, how hot will it get?

honey drink my wine

From New Scientist via reuters.

If you’re in a long distance relationship, you’d want to be as close to the other party as possible, as often as possible, whatever it takes. Like you’d be on the phone co-ordinating activites so you’re doing them “together;” or you imagine they’re having say a bowl of cereal and you get yourself a bowl of cereal too. You know, try to connect.

Now researchers at MIT have the answer to those nights when you just want to open a bottle of wine but have no one to share the intimate moment with … wine glasses that glow when one partner picks up the glass and even brighter when they put it against their lips. The glasses are wired with coloured LEDs, liquid sensors and wireless (GPRS or wi-fi) links that work across the miles.

Jackie Lee and Hyemin Chung, experts in human-computer interaction, say the wireless glasses really do “help people feel as if they are sharing a drinking experience together.”

For more practical use, the technology could also be used to check that hospital patients or elderly people are drinking enough water.

The glasses, dubbed lover’s cups, will be unveiled next month at a conference in Montreal on computer-human interaction.

All I want to say is, let’s hope the glasses don’t go all cloudy or disgusting when one party pukes in it.

get rich quick

From reuters.

One in five Americans believe the best way to get rich is to win the lottery, while 11 percent say inheriting money is the way to go, a survey showed on Monday. Asked the most practical way to accumulate “several hundred thousand dollars,” 21 percent chose winning the lottery, compared to 55 percent who thought saving something each month for many years was best, according to a survey by the Consumer Federation of America and the Financial Planning Association.

Dude, the odds of winning the lottery are … kinda hopeless. Just randomly googling “lottery odds” gives me (from the lottery site):

lottery odds
US Powerball 80,089,128
Australian PowerBall 54,979,155
British Lotto 13,983,816
Hong Kong Lotto 10,737,573
Irish Lotto 5,245,786

 

Time to move to Ireland?

Phasers … grrr

From new scientist

What do boys (and girls) who play with guns do when they grow up? They go into the military and invent “non-lethal” laser guns.

phasr

The Personnel Halting and Stimulation Response (PHASR) rifle was developed at the Air Force Research Laboratory in New Mexico, US, and two prototypes have been delivered to military bases in Texas and Virginia for further testing.

They temporarily blind suspects at a distance, allowing the police and military personnel to quickly disarm them.

It seems that the military have been developing these laser weapons for a long time but they were too strong that they caused permanent blindness. Anyone who owns a laser pointer for presentations can tell you the risk. However these new weapons may use less powerful laser beams and reduce the risk of long term damage.

Me? I think they just want to play with phasers and lasers. I mean, they are the stock in trade for sci-fi programs and films for ages and ages.

technipretender

Within my circle of friends, colleagues and family, I have the tech skills of a god. Like I don’t know anyone who has a website, runs a weblog, or knows their way round (albeit in a really beginner’s way) status symbols like photoshop.

But talking to more technically inclined people makes me realize how pathetically basic my so called skills are. It’s good to be humble.

Another expectation is I can solve all their problems. Man, don’t they know I’m know nothing about support, hardware, connections and most importantly, I don’t touch PCs with a 40 foot pole. This means start talking about Windows and I’m gonna blow a gasket. Unfortunately I know a bit about MS Office cos I have to use it at work, but no, I don’t use it at home.

So yeah, they think I know, but I’m just pretending.

So I studied chemistry and I get questions about the side effects of drugs, or how to make a bomb from fertilizer. Like, dude, if you trust a chemistry grad to tell you all about these things? mm took computer science and she’s the first to admit she’s totally lost the knowledge. Yeah, considering she switched as soon as she graduated.

I’m just glad I don’t get asked about repairing elevators and stuff like that.

what do robodogs dream of

I was surfing around researching Oxford for the Moments stories and I came across this group of Spatial Reasoning researchers working on a project called the Robot Sheepdog Project. The aim was to design a robot sheepdog that can herd sheep. Not as easy as it sounds. For a start, they used ducks cos ducks and sheep have similar “flocking patterns” and are easier to manage.

Then they had to design a mathematical model that predicted the ducks’ movements. The model was based on 3 flocking characteristics:

  • attraction to one another
  • repulsion from fixed obstacles such as walls
  • repulsion from the dog

To move the flock, the dog has to move till it is on the other side of the flock as the target, then gently move towards the target.

Ok, enough crazy scientific sidebars for today.

playing with numbers

For someone who studied the sciences my mathematics is terrible.

So I was reading a story the other day and I read about the Fibonacci Series. Once it’s explained, it’s so easy – it’s a series of numbers where the next number is the sum of the previous two, so it goes:

1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597

The origin for the series date back to 1202 when Fibonacci was thinking about the reproductive rate of rabbits. Really? Really.

It’s possible to find Fibonacci numbers without going through the addition, for instance to find f(500) involves a lot of adding so some guy called Binet worked out the formula for that. There’s also another formula to find the next term in the series.

Now, relating to the Fibonacci series is the golden number, which denotes the ratio between the long side and the short side of the most aesthetically pleasing rectangle. The definition of a golden rectangle is one that, when squared, gives another golden rectangle. For an illustration, go here.

The golden number has been denominated by the greek letter phi (φ) and has been calculated to be 1.61803398875…

So how do the Fibonacci series and the golden number relate. Watch. First take the first few Fibonacci numbers:

f(1) = 1
f(2) = 1
f(3) = 2
f(4) = 3
f(5) = 5
f(6) = 8
f(7) = 13
f(8) = 21
f(9) = 34
f(10)= 55

Then divide each number by the one before it:

r(1) = 1/1 = 1
r(2) = 2/1 = 2
r(3) = 3/2 = 1.5
r(4) = 5/3 = 1.6666..
r(5) = 8/5 = 1.6
r(6) = 13/8 = 1.625
r(7) = 21/13 = 1.6153846
r(8) = 34/21 = 1.6190476
r(9) = 55/34 = 1.6176471
r(10)= 89/55 = 1.6181818

Essentially the further we go in this calculation the closer we get to φ. Neat isn’t it.

What’s that got to do with real life? Not surprisingly there’s so much of mathematics in nature. Many flowers have a Fibonacci number of petals, like sunflowers have 34 petals and daisies 34, 55 or 89.

I wished I was better at all this. It’s quite fascinating.