Category Archives: Students

Items for students and others, interested in learning about science and engineering and the application of science in our lives. We post many of the general interest items here.

Science Interview with John Edwards

Interview with Senator John Edwards on Science-Related Topics

How would you address the current problems of scientific research in the USA – stopping the brain-drain, attracting foreign students, energizing young Americans to consider careers in science, the need for balance between basic and applied research, and encouraging development of science in other countries (with free flow of information between nations as well as between scientists and the public in the USA) while still retaining the US dominance?

There are so many things we can and must do. The president can send a signal that science is the cornerstone of American innovation and will support it, free from political agendas and distortions, send a signal that that the United States wants to lead the way in scientific inquiry, not close doors to certain avenues of research.

We must have a sensible policy towards attracting young scholars. International students are a valuable part of our higher education community, and I support our student visa programs. We need to do a better job tracking student visas, but we ought to be able to do that without creating long lines. U.S. consulates have been asked to interview more applicants personally, but have not been given enough resources.

The answers overall seem to be lacking in specifics. While providing a show of support for science they don’t seem to offer much else.

Well Preserved Baby Mammoth Discovered in Permafrost

Baby mammoth discovery unveiled

The six-month-old female calf was discovered on the Yamal peninsula of Russia and is thought to have died 10,000 years ago. The animal’s trunk and eyes are still intact and some of its fur remains on the body.
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Mammoths first appeared in the Pliocene Epoch, 4.8 million years ago. What caused their widespread disappearance at the end of the last Ice Age remains unclear; but climate change, overkill by human hunters, or a combination of both could have been to blame. One population of mammoths lived on in isolation on Russia’s remote Wrangel Island until about 5,000 years ago.

Engineering – Economic Benefits

The issues involved in the impact of engineering education and a strong economy are not easy to address in one short article. Impacts are delayed over time. Confusion between available skills and available skills at a certain price is often raised (people claiming there can’t be a shortfall of engineers if salaries are not rising even higher). But I continue to post about these topics because I think they are important (and I find it interesting to think about and read about…). And hopefully a good understanding can be gained through the many post (and the sources referenced in those posts – Economic Strength Through Technology Leadership, includes a listing of over 15 posts on these topics). Another article addresses some of these issues with some interesting points – Innovator fears U.S. losing edge:

Not unlike Hewlett and Packard or Harley and Davidson, Bob Kern created a company while tinkering in a rented garage in Waukesha more than five decades ago. To him, too few Americans seem capable of doing that today. “There’s a gross shortage of engineering talent in the country,” Kern says. Now 81, Kern built Generac into a company that employs some 2,000 people at three factories in Wisconsin and one in his native Iowa.

Generac makes power generators, the type that back up data centers, hospitals and homes during power failures. Equipped with a mechanical engineering degree from the University of Illinois, Kern spent his career searching for inventive folks to maintain a culture of constant innovation. More often than he cares to admit, he couldn’t find them in his home country. Since the 1970s, he has contracted with engineers in Korea, Taiwan, China, Japan and Great Britain.

What Kern represents is exactly what countries around the world are trying to duplicate. Talented businessmen creating good job. And note he started as an engineer and retired as the head of a 2,000 person company (S&P 500 CEOs – Again Engineering Graduates Lead).
Continue reading →

Interesting Lobsters

Is there a 400 pound lobster out there?

Lobsters sometimes bury their food and eat it over several days. They use teeth located in their stomachs, eat their molted shells (full of calcium) and can shed appendages if attacked, wounded or surprised, only to regenerate them later. Finally, lobsters live in a hierarchy and it’s the females who do the courting.

But there’s one lobster fact that trumps them all: lobsters show no apparent signs of aging. They don’t slow down or become weaker or more susceptible to disease. They don’t get infertile — older lobsters are actually more fertile than younger ones. Most lobsters seem to die because of something inflicted upon them and not because a body part failed or broke down. They’re such hardy creatures that scientists aren’t even sure how old lobsters can get. Add in that lobsters grow throughout their lives, and one has to ask: Is possible that a lobster born before Napoleon and as heavy as an NFL lineman is chowing down on the seafloor?

1=2: A Proof

1=2: A Proof using Complex Numbers

See if you can figure out in which step the fallacy lies. When you think you’ve figured it out, click on that step and the computer will tell you whether you are correct or not, and will give an additional explanation of why that step is or isn’t valid.

See how many tries it takes you to correctly identify the fallacious step!

This is a nice quick math refresher but the real reason I posted it is so I can say I got it on the first try 🙂

Intel International Science and Engineering Fair 2007

Top 3 students - Intel ISEF 2007

Can These Kids Save American Science?

Jose Manuel Otero realized that science was his goal in 1996, when he went to ISEF with a project on filtering diesel from water using charcoal that he made from leaves and grass. Otero, the son of Spanish immigrants who never finished high school, took first place in the Connecticut state fair and went on to the internationals, winning third place in his division. “I didn’t know I wanted to be a scientist until I got to ISEF,” he says.
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Where students in previous generations built robots in their basements or sampled pond water in the local park, the majority of today’s winning projects showcase research done in a lab under the supervision of a mentor, an academic at a university or corporate research institute. Students get their own portion of the lab’s investigation. If they discover anything of significance, they might be rewarded as a co-author of a paper the professor submits to a journal, or they might share in a patent that the lab takes out on their work. One team project from Stony Brook’s summer program on detecting individual cancer cells by how hard or soft they are is up for a patent and has been submitted to the journal Science.

The top three winners of the ISEF receive a $50,000 scholarship and $4 million in cash and scholarships are awarded. Related: Intel ISEF Awards 2006 – Science Fair Project on Bacterial Growth on Packaged Salads – Amber’s Science Talent Search Blog – Science Fair Directory

Obesity Epidemic Explained – Kind Of

Graphic: percentage of population over 15 with a body-mass index greater than 30, for more see Wellington Grey

Obesity Epidemic Explained – Kind Of

So maybe everyone else already knew this and I am like, bumpkin girl, but I just have to take a moment and point everyone to this USDA research site on the massive inflationary trend in daily caloric consumption over the past three decades.

1970 – Americans ate an average of 2170 calories per day
2000 – Americans ate an average of 2700 calories per day

I don’t think most people know that. It does seem odd to me that so much effort is put into trying to come up with explanations that are much more complicated. Most of the complicated suggestions (usually some explanation that indicates it is some biology issue and not eating to much or exercising too little) don’t explain why there is an increase in the incidence of obesity over time – at least I don’t see how they do. It seems to me the base requirement for improving the health issue of increasing obesity is to have an explanation of what has caused the incredible increase.

I can certainly believe biological issues impact how easy it is to become obese or how difficult it is to maintain a healthy weight. But it seems to me the proportion of the population that is obese has drastically increased over time (or different regions of the globe with a similar genetic makeup) and the logical place to look for an explanation is behavior differences that created this change (not some biological issue that has changed). If 5% of the population was predisposed obesity in 1950 to obesity I can’t see any rational reason to think that has increased to 30% today.

Home Engineering: Windmill for Electricity

photo of windmill

William Kamkwamba’s Malawi Windmill:

I built my first windmill when I was 15. Over the next few years I kept refining the design. I made many modifications to the plans i found in the book. For example, I increased the blades from three to four to provide more power output. The windmill now powers lights for 3 rooms and a light over our porch outside. I also use it to power my family’s two radios. I also can charge mobile phones that the neighbors have.
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Two weeks ago I used a computer for the first time. I learned about Google and searched for “windmill” and “solar energy.” I was amazed to learn how many entries there were for both subjects. My friends showed me how to create an email address and now I am on Gmail. Now I am practicing sending and receiving emails when I have access to a computer.
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On Sunday, my friends from National Solar and I completed the next phase of work on my electrical system. You can see a compete set of (my first) digital photos at my new site on Flickr. I had the following goals:

1. Upgrade the power generation in the windmill
2. Upgrade the battery technology and capacity, to provide more even power for more hours at a time
3. Increase the brightness of the lighting (lumens) to make it easier for my family to accomplish tasks at night, especially to read…

Photo: Back in November, the windmill was only 5 meters (15 feet) tall compared to 12 meters (36 feet) today. I raised the height because I discovered that the best wind was just over the top of the shorter windmill.

Learn Physics with Free Space Flight Simulator

The free, Orbiter Space Flight Simulator, is not a typical computer game.

The emphasis is firmly on realism, and the learning curve can be steep. Be prepared to invest some time and effort to brush up on your orbital mechanics background. Good starting points are JPL’s Basics of Space Flight, and R. Braeunig’s Rocket & Space Technology.
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Improved physics: Gravity-gradient torque effects are now implemented. Vessels in low orbit will now experience torques as a result of their mass distribution. Orbiter’s model of angular motion has also been extensively overhauled.

via: Space Simulator Related: So You Want to be a Computer Game Programmer – Physics Concepts in 60 Seconds – PhysicsQuest – Non-Newtonian Fluid Demo

Single Electron on Video

Researchers Catch Motion of a Single Electron on Video

Maris and Wei Guo, a doctoral student, took advantage of the bubbles that form around electrons in supercold liquid helium. Using sound waves to expand the bubbles and a coordinated strobe light to illuminate them, Guo was able to catch their movements on a home video camera.

A free electron repels the atoms that surround it, creating a small space, or bubble, around itself. In conventional liquids, the bubble shrinks to nothing because the surface tension of the liquid works against the repulsive force. Superfluid helium has very little surface tension, so the bubble can become much larger. The two opposing forces balance when the diameter of the bubble is about 40 angstroms – still far to tiny to see.

The researchers used a planar transducer – basically, a loudspeaker that produces flat, not focused, sound waves – to pummel the whole volume of liquid helium with sound. As each wave overtook an electron bubble, it alternately increased and decreased the surrounding pressure. Under negative pressure, the bubbles expanded to about eight microns, the size of a small speck of dust, then shrank again as the next wave of high pressure washed over them. A strobe light, synchronized to the sound pulse, illuminated the bubbles without overheating the chamber.

Running a camcorder in “super night mode,” Guo and Maris were able to record the approximately 2,000 photons they estimate were scattered by the expanded bubbles, producing a series of electron-bubble images on each frame of videotape.

Pretty amazing. My pictures are of a bit larger things.