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John Burk

Studying the Diving Reflex in the Laboratory > Innovative Uses > Vernier Software & Tec... - 0 views

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    A much smaller version of the diving reflex occurs in humans and is easy to demonstrate in the lab using a few Vernier sensors, a large bowl of cold water, or a cold pack on the face. When cold water (10°C or less) contacts the face, the diving reflex is elicited. Breathing is inhibited and heart rate decreases. This response is not observed during normal breath holding in air or when the face is placed in warm water. Heart rate will actually increase in these two conditions.
John Burk

How One College President Is Breaking Down Barriers For Women In Tech - Forbes - 0 views

  • The reluctance of women to enter STEM fields seems to have deep roots — which often don’t disappear even in the face of success. One of Dr. Klawe’s favorite topics is what she calls The Imposter Syndrome. “Even women who get into MIT, and major in engineering,” she says, “often continue to second guess themselves, worrying that success was a mistake. So the first time they get a B on an exam, they switch to a major in the humanities.  Yet males can get all C’s and think they’re doing great. It’s just normal for males to overestimate their success and for women to worry that they don’t deserve to be where they are. That insecurity often haunts them into their professional lives.”
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    A very interesting article about how Harvey Mudd has increased enrollment in computer science from 10% female to 40% female in <3yrs.  Quote is particularly interesting. 
John Burk

Why Ignorance Trumps Knowledge In Scientific Pursuit : NPR - 0 views

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    In Ignorance: How It Drives Science, neuroscientist Stuart Firestein writes that science is often like looking for a black cat in a dark room, and there may not be a cat in the room. Firestein discusses why the hit-or-miss process, the "not knowing" is the true engine of science.
John Burk

Why Science is "Just So Darn Hard" - THE DAILY RIFF - Be Smarter. About Education. - 0 views

  • The traditional lecture format is the not the best method for teaching science. Again to draw an analogy with physical education, lectures are of limited use when the subject being taught is an activity.
  • The competitive model for science education, and for education in general, is poor training for how work is actually accomplished. Corporations compete, athletes compete, politicians compete, but the vast majority of working people have to cooperate if they want to get anything done.
  • Competitive grading systems discourage recreational interest. This is true in school athletic programs and it is also true for science classes. Just as students who get picked last for sports teams conclude athletics is not for them, students who fail to make the cut in science classes, conclude that they lack the "science gene," and should not even try to understand the subject.
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  • Pedagogies that use "inquiry-based" or "discovery" methods have their place in science instruction, but should not, as some educators have advocated, be the only methods used.&nbsp;
  • Traditional classroom education does not select for some character traits that are critical for success in science. Patience and above all persistence are necessary personal traits for a successful career in science.
  • I tell them that when choosing research assistants I am not necessarily looking for the best student in the classroom, I am looking for a student with a strong work ethic,&nbsp; one who can accept direction and feedback, and one who is excited about the work.
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    interesting article that compares training of scientists to athletes and flaws with that model. 
John Burk

Onset of Electrical Resistance Measured for First Time | Wired Science | Wired.com - 0 views

  • Using a fast-pulsing laser, physicists have recorded the first moments of electrical resistance, the friction that generates heat as electricity travels through circuits.
  • Physicists knew electrical resistance didn’t kick in the moment a voltage was applied. Electrons experience some freedom before slowing to a crawl and scattering. What wasn’t certain was how quickly they make that transition (illustrated in the animation above, with electrons in blue, “electron holes” left by departing electrons in red, and voltage signified by the green arrow).
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    post contains very interesting video simulation showing electrons in a semiconductor responding to the applied voltage. 
John Burk

Inquiry: The birth of a model « Shifting Phases - 0 views

  • I explained that we were building the model we’d be using to predict the behaviour of circuits for the&nbsp; next two years, and that on tests, I would be evaluating whether they used their model in a well-reasoned way (“You’re going to grade us based on what we say??”&nbsp; They were astounded).&nbsp; I cautioned them against rejecting things too quickly, since they would need as much structure as they could get.&nbsp;
  • After each presentation, we discuss it and voted on it.&nbsp; For voting, they used the feedback flashcards I’d made in September.&nbsp; Green means accept; red means reject; yellow means “I have a question or want something clarified”.&nbsp;
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    outstanding post describing a true inquiry based classroom in a college level electronics course. Students actively build model to explain the behavior they see in circuits. 
John Burk

Embracing The Challenges Of Science Education : 13.7: Cosmos And Culture : NPR - 0 views

  • I never let my students forget that pairing of difficulty with results, because I never forget it. I let them know they are engaged in a sacred task that connects them to millennia of human effort encoded in their genes. If they can fight their way to the truth, the truth will make them free, just as it did for me that day in high school physics.
  • To engage with the world in search of any kind of Truth is an expression of the search for excellence. That, by its very nature, is desperately difficult. There will always be a price to be paid in time, sweat and tears. We should never sugarcoat that reality.
  • We want to teach students more than just how to get jobs, we also want to teach them how to live with depth and for purposes that stretch beyond their own immediate interests. We should never forget that connection. If we do, we are in danger of losing more than just the next generation of science majors.
John Burk

Experts vs Novices: what students struggle with most in STEM disciplines (pdf) - 0 views

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    hese results seem to indicate a troubling disconnect between how students (novice learners in the discipline), learn and understand their course material and how faculty (expert learners in the discipline) traditionally approach and teach this material. Possible reasons for this disconnect become clearer when we look at what differentiates an expert from a novice learner.
John Burk

Multicellular Life Evolves in Laboratory | Wired Science | Wired.com - 0 views

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    very cool story about multicellular yeast evolving in the lab in just 60 days. 
John Burk

Monet's ultraviolet vision - 0 views

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    Monet had his lenses removed due to cataracts late in life, and therefore could see in UV
John Burk

On Being the Right Size | Farnam Street - 0 views

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    cool article on scaling in animals in biology
John Burk

FlipperTeach (CArolyn Durley, AP Biology, British Columbia) - 0 views

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    Carolyn Durley is a fast talking, multi-tasking, teacher of students first and biology second, who has fallen hard for technology. She attended McGill University and after receiving a Bachelor of Science she ventured West and made BC home for the last 20 years. She is currently in her 18th year of teaching; Biology 12 and AP Biology at OKM in Kelowna, B.C.
John Burk

US students need new way of learning science - 1 views

  • Traditionally, science in the United States has been taught in isolated disciplines such as chemistry, biology and physics without clear connections being made between the subjects. The 8+1 effort encourages K-12 teachers to use the eight science concepts to build understanding within and between their courses as students advance through the grades.
  • Today's frontiers in science often occur at these disciplinary edges. Aided by the explosion in technology and scientific discoveries, new fields are arising that were hardly imagined a generation ago such as synthetic biology, digital organisms and genomics.
John Burk

"Was Einstein Right About Imagination?" - THE DAILY RIFF - Be Smarter. About Education. - 0 views

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    EO Wilson thinks de-emphasizing math in science will lead to increased interest in science
John Burk

App Store - Molecules - 1 views

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    Molecules is an application for viewing three-dimensional renderings of molecules and manipulating them using your fingers. You can rotate the molecules by moving your finger across the display, zoom in or out by using two-finger pinch gestures, or pan the molecule by moving two fingers across the screen at once. These structures can be viewed in both ball-and-stick and spacefilling visualization modes.
John Burk

Hunting Endangered Species - Marginal Revolution - 0 views

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    I was surprised to discover, however, that "some exotic animal species that are endangered in Africa are thriving on ranches in Texas, where a limited number are hunted for a high price." Texas hunters have saved several endangered African species, unfortunately for the animals, the story does not end happily. Video from 60 Minutes below-some excellent material on incentives, ethics and conservation for classroom discussion.
John Burk

Quantum Biology | World Science Festival Webcast - 0 views

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    Can the spooky world of quantum physics explain bird navigation, photosynthesis and even our delicate sense of smell? Clues are mounting that the rules governing the subatomic realm may play an unexpectedly pivotal role in the visible world. Leading thinkers in the emerging field of quantum biology explored the hidden hand of quantum physics on the scales of everyday life.
John Burk

Free Technology for Teachers: Interactive Build a Body Lesson - 0 views

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    In Sponge Lab Biology's Build a Body students construct a human body system-by-system. To build a body students drag and drop into place the organs and bones of a human body. Each organ and bone is accompanied by a description of the purpose of that bone or organ. The systems that students can build in the Build a Body activity are the skeletal, digestive, respiratory, nervous, excretory, and circulatory systems.
John Burk

10 Things I'm doing this Summer in Physics Class « Teach. Brian. Teach. - 0 views

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    great list of things to try in a physics class
John Burk

Life Out There: Eden in a Test Tube - Video Library - The New York Times - 0 views

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    great video from NYT on what is life? and effort to create life in a test tube, using RNA. 
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