Engineering Resources for K-12 Teachers

Teach Engineering, funded by NSF, provides k-12 teachers “teacher-tested, standards-based engineering content” to “enhance learning, excite students and stimulate interest in science and math through the use of hands-on engineering.”

The TeachEngineering digital library provides teacher-tested, standards-based engineering content for K-12 teachers to use in science and math classrooms. Engineering lessons connect real-world experiences with curricular content already taught in K-12 classrooms. Mapped to educational content standards, TeachEngineering’s comprehensive curricula are hands-on, inexpensive, and relevant to children’s daily lives.

Available modules include: Engineering and the Human Body, Exploring Solar Power, Engineering: Simple Machines and Environmental Engineering.

How do antibiotics kill bacteria?

How do antibiotics kill bacterial cells but not human cells? (pointy haired bosses (phb) at Scientific American broke the link so I removed it – see links in comments below that are not broken by phb behavior)

Most bacteria produce a cell wall that is composed partly of a macromolecule called peptidoglycan, itself made up of amino sugars and short peptides. Human cells do not make or need peptidoglycan. Penicillin, one of the first antibiotics to be used widely, prevents the final cross-linking step, or transpeptidation, in assembly of this macromolecule. The result is a very fragile cell wall that bursts, killing the bacterium.

Read more blog posts on antibiotics and on health care.

Beyond Genetics in DNA

Scientists Say They’ve Found a Code Beyond Genetics in DNA by Nicholas Wade:

The genetic code specifies all the proteins that a cell makes. The second code, superimposed on the first, sets the placement of the nucleosomes, miniature protein spools around which the DNA is looped. The spools both protect and control access to the DNA itself.
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Jerry Workman of the Stowers Institute in Kansas City said the detection of the nucleosome code was “a profound insight if true,” because it would explain many aspects of how the DNA is controlled.

Survey of Working Engineers

Working hard for their money by Elizabeth M. Taurasi, on the annual Design News salary survey:

Engineers earned an average of $73,000 last year, with the majority receiving a 3 percent increase over last year. Eighty-three percent of those surveyed stayed in the same job.

On average, engineers are working 46 hours per week and more than 40 percent have a bachelor’s degree in engineering. But to earn that paycheck, you’re doing more than ever.

From taking on supervisory and budgetary functions to learning new skill sets, to broadening their responsibilities, today’s design engineers are doing far more than they ever had before.

This is one more confirmation of the idea that engineers have to learn and practice not just engineering concepts but many management skills (as do other specialists). The workplace is becoming continuously more integrated and all specialists have to adapt to this reality. All specialists are having to work increasingly with those outside of their specialty.

And, as in the past, though even more toady, as more responsibility is gained often this means needing new skills outside of engineering (or whatever the specific specialty is).

The article provides more interesting thoughts relating to the survey.

USA Engineering Jobs

Jobs Update: The Death of U.S. Engineering by Paul Craig Roberts

The alleged “shortage” of U.S. engineering graduates is inconsistent with reports from Duke University that 30 percent to 40 percent of students in its master’s of engineering management program accept jobs outside the profession. About one-third of engineering graduates from MIT go into careers outside their field. Job outsourcing and work visas for foreign engineers are reducing career opportunities for American engineering graduates and, also, reducing salary scales.

The number of students that go into other fields does raise questions. However, I do not think the data provides answers on its own. Given that engineering majors are the highest paid graduates it is not a case that the students options are poor. It could well be that the engineering students are very capable in many ways and find jobs that are not focused on engineering (say management, finance or …).

Engineering curriculums are demanding. The rewards for the effort are being squeezed out by jobs offshoring and work visas. If the current policy continues of substituting foreign engineers for American engineers, the profession will die in the United States.

Once again the whole area of engineering jobs and the future is complex. But once again I disagree with the thinking presented here. The competition from abroad will increase greatly going forward. That is because every country that is focused on competing with the most successful economies is focused on improving their engineering capabilities. They all want the high paying and economically valuable jobs.

See more posts on science and engineering careers.

Reducing Risk of Diabetes Through Exercise

A Diabetic Battle of the Bulge by Diane Garcia

Diabetes appears to be written into some people’s genes, but with the right diet and exercise, the disease may never surface, according to a new study.
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In the lifestyle modification group, however, even individuals with two copies of the variant were no more likely to develop type 2 diabetes than participants without the variant, the team reports 20 July in the New England Journal of Medicine

Update – AAAS broke the link so I removed the link. I hope those responsible for web sites eventually take the time to learn what that responsibility entails: Web Pages Must Live Forever. I find these failures to follow the most basic web usability practices displayed most often in organizations where burocrates that don’t understand technology make decisions on how web sites should work instead of allowing those that have the necessary understanding of the technology do so.

A plane You Can Print

A plane you can print by Paul Marks:

In rapid prototyping, a three-dimensional design for a part – a wing strut, say – is fed from a computer-aided design (CAD) system to a microwave-oven-sized chamber dubbed a 3D printer. Inside the chamber, a computer steers two finely focused, powerful laser beams at a polymer or metal powder, sintering it and fusing it layer by layer to form complex, solid 3D shapes.

Polecat is a new unmanned plane: “About 90 per cent of Polecat is made of composite materials with much of that material made by rapid prototyping.”

More information on 3d printing from a manufacturer of the printers. Not quite ready for in home printing of say a new can opener on demand but can that day really be far away?