Poster Abstracts

Posters: Friday Night

Jerold Touger

WebLinks: An Online Resource for single-Concept Exploration

Curry College
jtouger@curry.edu

Examples will be shown of WebLinks.  These are short interactive Flash scenarios, each exploring a single concept.  Many involve animation.  I developed several WebLinks per chapter for my textbook (Introductory Physics: Building Understanding, John Wiley & Sons) but they are freely available online, and I would like folks to be aware of them as a resource.


Laurence I. Gould

“Global Warming, Climate Change” — A Critical Look

University of Hartford

lgould@hartford.edu
There continues to be an increasing number of scientists from around the world who are challenging the dominant claim that has been bolstered by so-called “consensus” scientific views — that dangerous “global warming/climate change” is caused primarily by human-produced carbon dioxide.  This poster will show that scientific evidence contradicts that claim.  It will also explain some of the errors that have been introduced from a corruption of the scientific method.  (Further information can be found at http://uhaweb.hartford.edu/lgould/ )

Norma M. Chase

Enhancing student understanding of DC circuit concepts and principles

Massachusetts College of Pharmacy and Health Sciences
norma.chase@mcphs.edu

Acquisition of full working knowledge of DC circuit concepts and principles remains an elusive goal for many students.  Here we present a sequence of twenty-three increasingly complex batteries and bulbs mini-experiments, along with more complex follow-up exercises (for discussion in class and homework).
Each mini-experiment consists of pair of circuits: an initial circuit and another circuit  obtained from the latter by adding or removing a circuit element. Students are required to make predictions based on first physics principles and then compare observed results (bulb brightnesses) with their predictions.  By design, predictions are not possible for one of the experiments,  although retrodictions are.  Decades of use have shown that student work on the mini-experiments generates interesting and productive in-lab discussions, and facilitates learning.

Deborah Mason-McCaffrey, Ph.D.

A Force is a Force – Extending a Newton’s Third Law Interactive Lecture Demonstration to Forces Acting at a Distance

Salem State University
dmasonmccaffre@salemstate.edu
Many students confuse momentum or acceleration with force. They are convinced that large objects exert larger forces on smaller objects or that fast-moving objects exert larger forces on slow-moving objects.  These contact force misconceptions are very effectively addressed by Thornton & Sokoloff’s Newton’s Third Law Interactive Lecture Demonstration (N3L-ILD).
However, after several years of using the N3L-ILD with my students, it became obvious that they did not understand that Newton’s Third Law also applies to electrostatic, magnetic and gravitational forces—forces acting at a distance. A inexpensive magnetic extension to the Newton’s Third Law ILD was designed and piloted last Fall. There is initial evidence that it has had some efficacy in addressing student misconceptions.

Paul H. Carr

Human Influence on Global Warming & Weather Extremes

AF Research Lab; U Mass Lowell Emeritus

paulcarr@alum.mit.edu

Since the beginning of the industrial era, carbon dioxide(C02)increases correlate with those of temperature.  Carbon dating shows that the C02 increase is from burning ancient fossil fuels. Increased greenhouse gases(C02,H20,CH4, etc.)blanket and warm the earth’s surface, allowing less heat to reach the stratosphere, which is cooling. This is expected from the constancy of solar irradiance. The present CO2 rate increase is 2000 times the average rate over the last 800,000 years, and the present level of 390 ppm is 31% higher.  Present C02 rates extrapolate to 900 ppm by 2100.  In the next millennium, sea levels could be hundreds of feet higher, as it was 51,000,000 years ago, when C02 was 1000 ppm andthe earth’s poles were ice-free. By 2100, present sea levels are projected to increase 2.5 – 6 ft. Without the radiative forcing of noncondensing CO2, the terrestrial greenhouse would collapse, plunging the global climate into an icebound earth state. Although economic losses from weather and climate-related disasters vary from year to year and place to place, they have increased in recent decades, according to IPCC and NOAA reports.

Reference:http://mirrorofnature.org/GlobalWarmingDebateNESAPS.pdf

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