How Healthy Is Squid for Us?
Posted on April 19, 2014 Comments (1)
I try to eat healthfully, especially when I can tweak what I eat to gain a health advantage. I know fish have good qualities. I live in Malaysia now and squid (called sotong here) is often available. I often prefer squid to fish here as the fish use here are often fairly small with bones to deal and not much meat for the effort (it is great sometimes but I am often lazy).
So I looked online for some details, it wasn’t as easy I would have hoped. The Shellfish Association of Great Britain offered a good overview.
They say 100g of raw squid (pre cooking weight) provides about 200% of Vitamin B12, 100% of Selenium, 80% of Copper, 50% of Vitamin B6, 35% of Vitamin E, 34% of Phosphorous, 30 % of Protein, 20% of Niacin, 10% of B1 (Thiamin), 8% of Potassium, 10% of Magnesium, 14% of Zinc.
From various sources online it seems there are 92 calories in 100 grams of Squid with a calorie breakdown of 72% protein, 14% fat and 14% carbs.
From the Heart Association of Australia “omega-3s are found primarily in oily fish, such as Atlantic and Australian salmon, blue-eye trevalla, blue mackerel, gem fish… Other fish such as barramundi, bream or flathead, and seafood such as arrow squid, scallops and mussels, are also good sources of omega-3… To reduce the risk of heart disease, the Heart Foundation recommends that Australian adults consume about 500 milligrams of omega-3 (marine source) every day.”
Using Drones to Deliver Medical Supplies in Roadless Areas
Posted on April 10, 2014 Comments (4)
This is an awesome use of technology to tackle important problems. Engineers are great.
[Andreas] Raptopoulos said the new system would be used to leapfrog the building of infrastructure, in the same way mobile networks have overtaken fixed lines in poorly connected countries.
In sub-Saharan Africa, 85% of roads are inaccessible during the wet season, cutting off huge swaths of the population and hindering the transport of medical supplies, he said.
There are three parts to the system delivering medical goods: the UAVs themselves, landing stations where packages can be dropped off and transferred, and the software that ensures vehicles get securely from point to point. Because of their short battery life, networks of drones are needed to work together, shuttling between ground stations
Approximate costings from Matternet put the price of unmanned aerial vehicles at £6,000 each and ground stations at £3,000 each. A network of five ground stations and 10 UAVs, as well as setup and training, would cost a charity in the region of £90,000, according to Raptopoulos. An eight-propeller drone can carry 2kg and travel 10km in good weather. Batteries need to be replaced every 600 cycles.
They are hiring: software engineer and avionic engineering right now. They are Palo Alto, California.
Alternative Career Paths Attract Many Women in Science Fields
Posted on April 5, 2014 Comments (1)
Instead of following traditional paths, women are using their science, technology, engineering, and math degrees to create new careers.
Because women have traditionally been excluded from these disciplines, and because their fresh eyes allow them to make connections between fields, many women are launching careers, and even entire industries, based on a flexible and creative definition of what it means to be a scientist, artist, or engineer. K-12 schools have done a particularly poor job of integrating study across STEM fields and encouraging creativity and interdisciplinary connections.
We continue to teach science, technology, and math in isolation, as if they have little to do with one another. This sort of compartmentalized approach runs counter to what we know about effective learning: Students need to be able to connect content knowledge and concepts to real-world applications in order to develop mastery and passion for a subject.
The challenge for anyone seeking to forge a brave new path through STEM careers, particularly ones that involve interdisciplinary study and practice, is the challenge of job stability. Kendall Hoyt, professor of technology and biosecurity at Thayer School of Engineering explained, “Interdisciplinary career paths are easier to create than they are to sustain, because there is not an established career trajectory and evaluation system.”
The challenge of how to maximize the opportunities for those interested in careers in science, technology, engineering and math is important to all economies. There are difficulties in doing this and so continued focus on this area is good. My personal belief is we focus too much on the gender issue. Yes, we should reduce discrimination. I think we have done well but still have further to go.
Most of the suggested changes in how things should be done help women and also plenty of men that are turned off by the old way of doing things.
I also think we need to be careful in how we use data. Clamoring about discrepancies in a field with far more men (say physics) while not doing the same about a field with far more women (say psychology) is questionable to me. I don’t believe that any field that isn’t 50% male and 50% female is evidence that we need to fix the results so they are 50% each.
I believe we should provide everyone the opportunity to pursue the interests they have. They must perform to earn the right to continue. And we don’t want to waste potential with foolish barriers (for women, minorities or men). But if we do so and certain fields attract more women and others attract more men I think we can waste our effort by being too worried that certain fields are problematic.
If we are concerned it should be based on data and looking at the real world situation. In the coming decades my guess is women will exceed men in careers in many science disciplines (engineering still has fairly high male bias overall though some field, such as bio-engineering are already majority female graduates). It starts with education and women are already the majority of undergraduate degrees in science and engineering overall. And in many disciplines they dominate.
Goats Excel at Learning and Remembering a Complex Tasks
Posted on March 29, 2014 Comments (1)
I like research showing animals using intelligence that seems advanced, for example: Crow Using a Sequence of Three Tools – Insightful Problem Solving in an Asian Elephant – Bird-brains smarter than your average ape – Tropical Lizards Can Solve Novel Problems and Remember the Solutions – Pigeon Solves Box and Banana Problem.
I also like open access science, and this has both: Goats excel at learning and remembering a highly novel cognitive task
The individual learning abilities and long-term memory of goats highlighted in our study suggest that domestication has not affected goat physical cognition. However, these cognitive abilities contrast with the apparent lack of social learning, suggesting that relatively intelligent species do not always preferentially learn socially. We propose that goat cognition, and maybe more generally ungulate cognition, is mainly driven by the need to forage efficiently in harsh environments and feed on plants that are difficult to access and to process, more than by the computational demands of sociality. Our results could also explain why goats are so successful at colonizing new environments.
The experiment was done with domesticated goats. I also learned this from the article, which I didn’t know before:
Refusal to Follow Scientific Guidance Results in Worms Evolving to Eat Corn Designed to Kill The Worms
Posted on March 22, 2014 Comments (0)
An understanding of natural selection and evolution is fundamental to understanding science, biology, human health and life. Scientists create wonderful products to improve our lives: vaccines, antibiotics, etc.; if we don’t use them or misuse them it is a great loss to society.
There is also great value in genetic enhanced seeds and thus plants (through natural human aided processes such as breeding and providing good genetic material over a wide area – distances that would not be covered naturally, at least not in a time that helps us much). Genetic Modified Organisms (GMO) food, in which we tinker with the genes directly also holds great promise but has risks, especially if we forget basic scientific principles such as biodiversity.
By the turn of the millennium, however, scientists who study the evolution of insecticide resistance were warning of imminent problems. Any rootworm that could survive Bt exposures would have a wide-open field in which to reproduce; unless the crop was carefully managed, resistance would quickly emerge.
Key to effective management, said the scientists, were refuges set aside and planted with non-Bt corn. Within these fields, rootworms would remain susceptible to the Bt toxin. By mating with any Bt-resistant worms that chanced to evolve in neighboring fields, they’d prevent resistance from building up in the gene pool.
But the scientists’ own recommendations — an advisory panel convened in 2002 by the EPA suggested that a full 50 percent of each corn farmer’s fields be devoted to these non-Bt refuges — were resisted by seed companies and eventually the EPA itself, which set voluntary refuge guidelines at between 5 and 20 percent. Many farmers didn’t even follow those recommendations.
Using extremely powerful tools like GMO requires society to have much better scientific literacy among those making decisions than any societies have shown thus far. The failure of our governments to enforce sensible scientific constraints on such use of genetic engineering creates huge risks to society. It is due to this consistent failure of our government to act within sensible scientific constraints that causes me to support efforts (along with other reasons – economic understanding – the extremely poor state of patent system, risk reduction…) to resist the widespread adoption of GMO, patenting of life (including seeds and seeds produced by seeds).
Wonderful things are possible. If we grow up and show a long term track record of being guided by scientific principles when the risks of not doing so are huge then I will be more supportive of using tactics such as GMO more easily. But I don’t see us getting their anytime soon. If anything we are much less scietifically minded and guided than we were 50 years ago: even while we bask in the glorious wonders science has brought us on a daily basis.
More Muscle Mass Appears Linked to Longer Life
Posted on March 15, 2014 Comments (0)
New UCLA research suggests that the more muscle mass older Americans have, the less likely they are to die prematurely. The findings add to the growing evidence that overall body composition — and not the widely used body mass index, or BMI — is a better predictor of all-cause mortality. The study was published in the in a closed science journal (it is too bad UCLA promotes such anti-science practices). The research was funded by the NIH (who also shouldn’t allow such anti-science practices).
Dr. Preethi Srikanthan: “many studies on the mortality impact of obesity focus on BMI. Our study indicates that clinicians need to be focusing on ways to improve body composition, rather than on BMI alone, when counseling older adults on preventative health behaviors.”
The researchers analyzed data collected by the National Health and Nutrition Examination Survey (NHANES) III, conducted between 1988 and 1994. They focused on a group of 3,659 individuals that included men who were 55 or older and women who were 65 or older at the time of the survey. The authors then determined how many of those individuals had died from natural causes based on a follow-up survey done in 2004.
The body composition of the study subjects was measured using bioelectrical impedance, which involves running an electrical current through the body. Muscle allows the current to pass more easily than fat does, due to muscle’s water content. In this way, the researchers could determine a muscle mass index — the amount of muscle relative to height — similar to a body mass index. They looked at how this muscle mass index was related to the risk of death.
They found that all-cause mortality was significantly lower in the fourth quartile of muscle mass index compared with the first quartile.
Explaining the Higgs Boson Particle Again
Posted on March 10, 2014 Comments (0)
Excerpt from Piled Higher and Deeper by Jorge Cham – go see the entire illustration.
Related: 5% of the Universe is Normal Matter, What About the Other 95%? – At the Heart of All Matter – The god of small things – CERN Pressure Test Failure – Ninja Professors – Friday Fun, CERN Version
Math Education Results Show China, Singapore, Korea and Japan Leading
Posted on March 4, 2014 Comments (3)
The most comprehenvise comparison of student achievement in math and science around the globe undertaken by the Organisation for Economic Co-operation and Development (OECD). The 2012 Program for International Student Assessment (PISA) focuses on math understanding of 15 year olds (the 2014 report will focus on science). The 2009 report focused on the results of science education student achievement around the globe.
2012 results for the math portion (rank – country – mean score)(I am not listing all countries):
- 1 – Singapore – 573
- 2 – Korea – 554
- 3 – Japan – 536
- 5 – Switzerland – 531
- 6 – Netherlands – 523
- 7 – Estonia – 521
- 8 – Finland – 519
- 9 – Canada – 518
- 12 – Germany – 514
- 24 – UK – 494 (this is also the OECD average)
- 34 – USA – 481
- 49 – Malaysia – 421
- 50 – Mexico – 413
All 34 OECD member countries and 31 partner countries and economies participated in PISA 2012, representing more than 80% of the world economy. Portions of China participated and did very well including Shanghai-China (highest mean score of 613 points – if you ranked that as a country, I ignored these “regional results” in the ranks I shown here), Hong Kong-China (561, 3rd if including countries and regions together), Chinese Taipei [Taiwan] (560, 4th), Macao-China (538, 6th).
Boys perform better than girls in mathematics in 38 out of the 65 countries and economies that participated in PISA 2012, and girls outperform boys in 5 countries.
Related: Playing Dice and Children’s Numeracy – Numeracy: The Educational Gift That Keeps on Giving – Mathematicians Top List of Best Occupations – The Economic Consequences of Investing in Science Education – Country H-index Ranking for Science Publications – Economic Strength Through Technology Leadership
How Wolves Changed the Yellowstone Ecosystem
Posted on February 22, 2014 Comments (0)
A great short video explaining the dramatic changes to the Yellowstone ecosystem with the re-introduction of wolves. Even the rivers changed.
Related: Light-harvesting Bacterium Discovered in Yellowstone – Fishless Future – The Sea Otter story – Yellowstone Youth Conservation Corps – Polar Bears Playing with Huskies – Curious Cat travel photos of Yellowstone National Park
Do It Yourself Solar Furnace for Home Heating
Posted on February 15, 2014 Comments (5)
“Just mount it on the side. If you touch the side of the house, even at —20 C, it’s still hot. We should be gathering that heat and driving it inside as quickly as possible.”
It is great to see do it yourself solutions that easily tap the energy provided by the sun to heat your house.
I had a friend that had a south facing greenhouse (attached to her house) that had 2 huge water tanks. They would heat up in the sun and give off heat all night (the stone floor would do the same thing).
Related: Brian’s Pop Can Solar Heater – Solar DIY Space Heating Projects – How to Build a Soda Can Heater – Pay as You Go Solar in India – Soda-can furnaces powered by solar energy heat Denver neighborhood – Green Building with Tire Bales – Cost Efficient Solar Dish by Students (2008)
Why Don’t All Ant Species Replace Queens in the Colony, Since Some Do
Posted on February 8, 2014 Comments (1)
My response to: There are other species of ants that do replace the queen, so why did some species not do this?
Basically the method they evolved copes well with losing the queen. Out of various ways of dealing with having a dominant Queen some may lead to replacement if she dies.
There are lots of examples of method is very effective at creating lots of successful offspring but happens to be less than ideal in some situations. Natural selection is pretty amazing and awesome at creating effective genes but we certainly can look at the results sometimes and see improvements that would be useful.
Likely if losing the queen was very common a good way of dealing with that would be found (or that species would be disadvantaged and at risk). If the queen happens to evolve to being very reliable coping with her death becomes less important. If they produce lots of useful offspring but have a less than ideal method of coping with their home colony losing her it is entirely sensible to imagine that species could flourish.
I would imagine species with queens that had shorter lifespans, that invested more in the home colony, that were less effective at setting up new colonies… would be more likely to have better queen replacement strategies/results.