Tag Archives: Students

Experimenting Social Network

Social media is definitely a fad filled with lots of ways to waste time. It also does have real value, ways to connect to things people care about and wish to focus on. Reddit is a good site for finding interesting resources online. Sub-reddits are topical areas within Reddit (I have set up management and investing sub-reddits). A new experiment subreddit looks very interesting:

Each experiment will go through a few threads. The first step will be a query for experimental methods. Someone will present a problem or piece of information they want to find out, and then others will suggest methods. Once this is agreed upon, it will be carried out, and a second thread will be posted detailing the method and providing a place to post results via the comments. Then, a third thread can be made to discuss the results. Having more than one thread for every experiment will make things more accessible and easier to sort.

Don’t research ways other people have experimentally determined these things. Submit original ideas to the experimental design thread. Try to come up with a novel way to discover things, but don’t be completely limited by this suggestion. This is chiefly about rediscovery, not repeating someone else’s experiment, but sometimes there’s fun and merit in that as well.

I have joined. You can go to Reddit and join this subreddit to see experiences with experimenting to learn about the world around us.

What is a Molecule?

One of the things I keep meaning to do more of with this blog is provide some post on basic science concepts that may help raise scientific literacy. Some of these will be pretty obvious but even reminders on some facts you know can sometimes help.

What is a molecule?

A molecule is the smallest particle of a compound that has all the chemical properties of that compound. Molecules are made up of two or more atoms, either of the same element or of two or more different elements. The example of molecules are water (H₂O) and carbon dioxide (CO₂) and molecular nitrogen (N₂).

Organic molecules contain Carbon, for example, Methane CH₄). The original definition of “organic” chemistry came from the misconception that organic compounds were always related to life processes.

A few types of compounds such as carbonates, simple oxides of carbon and cyanides, as well as the allotropes of carbon, are considered inorganic. The division between “organic” and “inorganic” carbon compounds while “useful in organizing the vast subject of chemistry…is somewhat arbitrary”

Ionic compounds, such as common salt, are made up not of molecules, but of ions arranged in a crystalline structure. Unlike ions, molecules carry no net electrical charge.

Young Engineers Take LEGO ‘Bots For a Swim

The Stevens Institute of Technology hosts this competition annually on its campus here, gathering students earlier this month from more than 40 middle and high schools to pit their designs against one another in kiddie pools on the banks of the Hudson River. In dozens of such competitions around the world, young people build, program and drive vehicles made of Legos and other more rugged materials. These events are a bid to interest a new generation in careers in engineering and robotics, and they are becoming more sophisticated.
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Upping the ante this year, Build IT introduced Lego’s NXT programmable control box. At least one student on each team learned to program the NXT. The programmer determined which of the vehicle’s propellers would spin and in which direction when the driver moved the levers.

Holding up the device, Abigail Symons from Lincoln Park Middle School demonstrated her work. “Those are the controls and those are the touch sensors and this is a rotation sensor,” she said. She had never used such technology before she joined the team.

“I thought I was going to be bad at it because I wasn’t sure if the right motor would go with the right propeller, but in the end I got it so, it was good,” she said.
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The Build IT program is funded by a $1.2 million grant from the National Science Foundation with further funding by the Motorola Foundation. It is one facet in the NSF’s scheme to entice students into future careers in engineering and other sciences.

Roger Tsien Lecture On Green Florescent Protein

Nobel Laureate Roger Tsien discusses his research on green florescent protein. From the Nobel Prize web site:

n the 1960s, when the Japanese scientist Osamu Shimomura began to study the bioluminescent jelly-fish Aequorea victoria, he had no idea what a scientific revolution it would lead to. Thirty years later, Martin Chalfie used the jellyfish’s green fluorescent protein to help him study life’s smallest building block, the cell.
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when Anton van Leeuwenhoek invented the microscope in the 17th century a new world opened up. Scientists could suddenly see bacteria, sperm and blood cells. Things they previously did not know even existed. This year’s Nobel Prize in Chemistry rewards a similar effect on science. The green fluorescent protein, GFP, has functioned in the past decade as a guiding star for biochemists, biologists, medical scientists and other researchers.
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This is where the third Nobel Prize laureate Roger Tsien makes his entry. His greatest contribution to the GFP revolution was that he extended the researchers’ palette with many new colours that glowed longer and with higher intensity.

To begin with, Tsien charted how the GFP chromophore is formed chemically in the 238-amino-acid-long GFP protein. Researchers had previously shown that three amino acids in position 65–67 react chemically with each other to form the chromosphore. Tsien showed that this chemical reaction requires oxygen and explained how it can happen without the help of other proteins.

With the aid of DNA technology, Tsien took the next step and exchanged various amino acids in different parts of GFP. This led to the protein both absorbing and emitting light in other parts of the spectrum. By experimenting with the amino acid composition, Tsien was able to develop new variants of GFP that shine more strongly and in quite different colours such as cyan, blue and yellow. That is how researchers today can mark different proteins in different colours to see their interactions.

Science Knowledge Quiz

pew research science quiz results

Pew Research Center’s new study of science and its impact on society includes a science knowledge quiz. You can test yourself on the quiz. Thankfully I was able to get all 12 answers correct, which 10% of those taking the test have done. The median score was 8 out of 12.

I find some of the results surprising. The question most often answered correctly is “Which over-the-counter drug do doctors recommend that people take to help prevent heart attacks?”. The least often “Electrons are smaller than atoms,” a true or false question fewer than 50% of people got right.

Public Praises Science; Scientists Fault Public, Media

Americans like science. Overwhelming majorities say that science has had a positive effect on society and that science has made life easier for most people. Most also say that government investments in science, as well as engineering and technology, pay off in the long run. And scientists are very highly rated compared with members of other professions: Only members of the military and teachers are more likely to be viewed as contributing a lot to society’s well-being.
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Just 17% of the public thinks that U.S. scientific achievements rate as the best in the world. A survey of more than 2,500 scientists, conducted in collaboration with the American Association for the Advancement of Science (AAAS), finds that nearly half (49%) rate U.S. scientific achievements as the best in the world.
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large percentages think that government investments in basic scientific research (73%) and engineering and technology (74%) pay off in the long run. Notably, the partisan differences in these views are fairly modest, with 80% of Democrats and 68% of Republicans saying that government investments in basic science pay off in the long run. Comparable percentages of Democrats and Republicans say the same about government investments in engineering and technology.

In this regard, public views about whether funding for scientific research should be increased, decreased or kept the same have changed little since the start of the decade. Currently, more than twice as many people say that, if given the task of making up the budget for the federal government, they would increase (39%) rather than decrease (14%) funding for scientific research; 40% say they would keep spending as it is. That is largely unchanged from 2001, when 41% said they would increase funding for scientific research.

Paper Towels vs Electric Dryer

Sustainability Showdown: Paper Towels vs Electric Dryer

First off, let’s address one common misconception: for the most part, nobody’s cutting down trees just for paper towels. Most paper towels you find in public bathrooms are made from recycled paper, and even those that aren’t are made from industrial waste created in the manufacturing of regular paper.
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The reason hand dryers came out ahead ended up having surprisingly little to do with the actual act of drying your hands. Most of the emissions and contributions to greenhouse gases come from decomposition of the towels in a landfill.
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Like all life-cycle analyses, this one’s a bit messy, but no studies appear to support the use of paper towels over a hand dryer. Even in the best paper cases, hand dryers come out ahead. To top it off, if a business uses 100% clean energy, the impact and emissions from a hand dryer become a orders of magnitude better than those for paper towels.

So the next time you’re standing with drippy hands and a dilemma on the wall, you can choose the hand dryer, and let the green part of your brain breathe freely.

Ant mega-colony

Ant mega-colony takes over world

Argentine ants living in vast numbers across Europe, the US and Japan belong to the same interrelated colony, and will refuse to fight one another. The colony may be the largest of its type ever known for any insect species, and could rival humans in the scale of its world domination.
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In Europe, one vast colony of Argentine ants is thought to stretch for 6,000km (3,700 miles) along the Mediterranean coast, while another in the US, known as the ‘Californian large’, extends over 900km (560 miles) along the coast of California. A third huge colony exists on the west coast of Japan.
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While ants are usually highly territorial, those living within each super-colony are tolerant of one another, even if they live tens or hundreds of kilometres apart. Each super-colony, however, was thought to be quite distinct. But it now appears that billions of Argentine ants around the world all actually belong to one single global mega-colony.
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The team selected wild ants from the main European super-colony, from another smaller one called the Catalonian super-colony which lives on the Iberian coast, the Californian super-colony and from the super-colony in west Japan, as well as another in Kobe, Japan.

Ants from the smaller super-colonies were always aggressive to one another. So ants from the west coast of Japan fought their rivals from Kobe, while ants from the European super-colony didn’t get on with those from the Iberian colony.
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But whenever ants from the main European and Californian super-colonies and those from the largest colony in Japan came into contact, they acted as if they were old friends.

Student Invents Solar-Powered Fridge

solar powered refrigerator illustration

Student Invents Solar-Powered Fridge for Developing Countries

21-year-old student/inventor/entrepreneur Emily Cummins has designed a brilliant portable solar-powered refrigerator that works based upon the principle of evaporation. Employing a combination of conduction and convection, the refrigerator requires no electricity and can be made from commonly available materials like cardboard, sand, and recycled metal.
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Simply place perishable foods or temperature-sensitive medications in the solar refrigerator’s interior metal chamber and seal it. In-between the inner and outer chamber, organic material like sand, wool or soil is then saturated with water. As the sun warms the organic material, water evaporates, reducing the temperature of the inner chamber to a cool, 6 ÂºC [43 ÂºF] for days at a time!

After winning Â£5,000 from York Merchant Adventurers for her idea, Emily delayed going to college for a year to take her refrigerator to Africa for further development.
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At 16 Emily won a regional Young Engineer for Britain Award for creating a toothpaste squeezer for people with arthritis, and the next year went on to win a Sustainable Design Award for a water-carrier made from wood and rubber tubing. In 2007 Emily was named the British Female Innovator of the Year, and last year was short-listed for Cosmopolitan’s 2008 Ultimate Women of the Year Competition.

Update: some readers seem confused by what related means below. Those links show previous post to related items and include previous similar designs to keep things cool, including “Refrigerator Without Electricity” which is a clay pot design by Mohammed Bah Abba of Nigeria for the Pot in Pot Cooling System that received the 2000 Rolex award.

Seventh-grader’s Solar Cell Research

photo of William Yuan

Seventh-grader shines with solar cell research

Yuan worked on his project for the past two years with the encouragement of his science teacher Susan Duncan; support of his parents Gang Yuan and Zhiming Mei; and counsel of professional mentors Professor Chunfei Li of Portland State University’s Center for Nanofabrication and Electron Microscopy, Fred Li of Applied Materials Inc. and Professor Shaofan Li of the Department of Civil Engineering at the University of California – Berkeley.

“He is our youngest fellow in science that we’ve ever had,” Moessner said. “He is really spectacular. “His project will really make a difference in advancing the technology of solar cells. You would never know he’s 12 looking at the quality of his work.”

Beaverton boy lauded for solar cell invention

there have been many questions about the research by William Yuan. Some have even questioned whether he copied the research of others and claimed it as his own. That is far from the case. Yuan fully documented all of his sources and never tried to imply that he invented the 3D solar cell. He did create a new type of 3D solar cell that works for visible and UV light

William Yuan was awarded a 2008 Davidson Fellow award

In his project, “High Efficient 3-Dimensional Nanotube Solar Cell for Visible and UV Light,” William invented a novel solar panel that enables light absorption from visible to ultraviolet light. He designed carbon nanotubes to overcome the barriers of electron movement, doubling the light-electricity conversion efficiency. William also developed a model for solar towers and a computer program to simulate and optimize the tower parameters. His optimized design provides 500 times more light absorption than commercially-available solar cells and nine times more than the cutting-edge, three-dimensional solar cell.

Students at Powhatan Engineering Camp

Students attend Powhatan’s first-ever engineering camp

The 28 students participating in the first-ever Powhatan County Schools engineering camp spent eight days doing hands-on activities like building model amusement park rides and suspension bridges, and taking field trips to see engineering in action. They visited the Richmond Times Dispatch’s production facility, where they observed robots shuttling stacks of paper back and forth, and the Watkins Center, where they observed engineers at work on a construction site.

The group even enjoyed a presentation from a NASA engineer, who spoke of his experience working on the Mars rover.

These engineering camps help kids enjoy their naturally inquisitive minds – which unfortunately they don’t get to do often enough.