developing an educational outreach kit based on dimensional metrology
DESCRIPTION
Developing an Educational Outreach Kit based on Dimensional Metrology. Speaker: Hy D. Tran, PhD, PE Sandia National Laboratories Monday July 30, 2012. - PowerPoint PPT PresentationTRANSCRIPT
Developing an Educational Outreach Kit based on Dimensional Metrology
Speaker:Hy D. Tran, PhD, PESandia National Laboratories
Monday July 30, 2012
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.
Desired Outcomes• Participants will be familiar with the contents of the
newly developed dimensional metrology kit for metrology ambassador activities
• Participants will be familiar with the contents of the laser interferometer demonstration
• Participants will seek opportunities to use both new kits in STEM outreach activities, and will add new materials for use by other metrology ambassadors
04/22/2023 2
Why a dimensional metrology kit?• Existing kits in the L&D library have well developed
content, including structure and learning outcomes aligned with educational content standards
• Existing kits limit number of participants (two students per kit approaches a practical limit)
• Dimensional metrology is easily related to NCSLI “Introduction to Metrology” presentation (the Cubit is a dimensional standard)– The author is familiar with dimensional metrology
04/22/2023 3
Challenges and Possible Solutions• Loss of interest in STEM fields for US students in
middle school and high school– Hands-on activities to engage and enthuse student
• Teacher interest and involvement– Links between materials in outreach and state
standards• Volunteer effort
– Prepared materials, presentations, activities
04/22/2023 4
Intended audience and goals for outreach• Easy for metrology ambassadors to use
– Easy for metrology ambassadors to extend!– Well-articulated outcomes that schools can use
• Target audience is middle school to high school (US ages 12-18)– Keep (or increase) students’ interests in STEM fields– Provide STEM teachers additional resources and ideas
04/22/2023 5
Development plan
Questions:• What are “good”
student outcomes?• What experiences
would help lead to good outcomes?
• Balance with volunteer development effort
• Balance with resources
Solutions• Investigate educational
standards; talk with teachers; talk with other volunteers
• Borrow ideas from metrology ambassadors, from L&D community, …
• Solicit donations
04/22/2023 6
Ideas for dimensional metrology ambassador kit
04/22/2023 7
The dimensional kit• Target audience: Middle school and up (adjust
content depth depending on time and audience)• Measurement content: Aligns with NM math and
science standards; also aligns with new US “common core” math standards– Analysis of experimental data– Concepts in traceability and uncertainty
• Can also be used with more “open-ended” questions• Can weave in “careers in metrology” resources
– Motivate students to learn more about metrology
04/22/2023 8
Audience participation• Pass around parts of dimensional kit• Students would be asked to measure diameter &
length of serialized cylinders.• Possible concepts:
– Comparison– Statistical evaluation– Procedures and communications
04/22/2023 9
Sample slides for the caliper kit
04/22/2023 10
04/22/2023 11
Learning ObjectivesParticipants will be able to:
• Describe “metrology”• Explain what is a
measurement• Describe repeatability
and accuracy
• Describe mean, variance, standard deviation
• Apply mean and standard deviation in evaluating measurement data
• Describe a histogram, and plot a histogram
• Relate mathematics and statistics to a career
Hands on• We’re going to do some hands-on exercises
– Divide into teams of 2• Measuring cylinders: Want both diameter and length
– To use the digital calipers:• Turn on (press on button); close jaws; press zero button;
select units (inch or mm)• Measure length and measure diameter (use inch
units. Official policy is to use SI, but for this class we’ll use inches because I’m contrary) – legally, worldwide: 1 inch = 0.0254 meter exactly
• One of the team members raise your hand (and keep it up) when you’re done.
04/22/2023 12
Discussion• How did you measure the item?
– How many times did you measure?– If you measured more than once, was it
on the same points?– Or different points?– What plan did you make beforehand?– If you measured a diameter on a
cylinder more than once, how did you decide what value to record?
04/22/2023 13
Student worksheet
04/22/2023 14
OK, let’s compare!• Do you want to re-measure your cylinders before we
continue?• Each team selects the last cylinder you measured,
and report:– Cylinder number– Length– Diameter
• (go to next slide to write down data)
04/22/2023 15
Interferometer demonstration• Set up interferometer demo. Play slide
interferometer slide show• Concepts:
– History of length unit and SI– Demonstration of Michelson interferometer
04/22/2023 16
Sample slides for interferometer
04/22/2023 17
www.MetrologyCareers.com
PRESENTINGtheNCSLI Michelson Interferometer
in a Pizza Box!
Objectives
The roots of the metric system The definition of the meter Albert Michelson’s contribution to optics Principles of interferometry The geometry of the Michelson interferometerAnd you will interact with a working interferometer
NCSL INTERNATIONALSERVING THE WORLD OF
MEASUREMENT SINCE 1961
You will learn about
Origins of the metric system Prior to the French revolution, each region
in France had its own standards• Different “yard” units for textiles (toise)• Different “bushel” units for grain• Different “pint” measures for beer
Idea of rationalizing units from 1670: Abbé Mouton proposes 1 minute of arc of the circumference of the earth as the primary standard of length; decimal divisions
NCSL INTERNATIONALSERVING THE WORLD OF
MEASUREMENT SINCE 1961
The meter in the US 1875: US signs the Convention of the
Meter 1890: US receives K-4 and K-20 (kilogram
standards) and meter 21 and 27 1893: T. C. Mendenhall, Superintendent of
Weights & Measures in the US orders the adoption of the international prototype meter and kilogram as US standards.
NCSL INTERNATIONALSERVING THE WORLD OF
MEASUREMENT SINCE 1961
Albert A. Michelson 1852-1931 Grew up in Northern California & West Nevada Appointed to US Naval Academy; returned as an
instructor, then, to Case School of Applied Science, Clark University, and finally University of Chicago
Did experiments to measure the speed of light, and also the Michelson-Morley experiment to determine the speed of travel of earth in the “aether” (1887)
Visited BIPM to set up interferometers for measuring the meter bars!
NCSL INTERNATIONALSERVING THE WORLD OF
MEASUREMENT SINCE 1961
Measuring outcomes• Questions on student self-assessment of attitudes “before” and “after” (7th,
10th, & 1st year college students): Rate from 1-5
Q1___Before attending the presentations, I can describe what is “metrology” Q2___Before attending the presentations, I can explain what is a measurement and give an example Q3___Before attending the presentations, I can describe or explain repeatability and accuracy Q4___Before attending the presentations, I can relate the use of measurements to society Q5___Before attending the presentations, I can describe or explain a histogram, and describe or explain
measures of dispersion of data Q6___Before attending the presentations, I was interested in pursuing a career in a science, technology,
engineering, or mathematics-related field
• Consultation with statistician; evaluation of changes
04/22/2023 23
Some outcome measurements
04/22/2023 24
Chan
ge in
Q1
Chan
ge in
Q2
Chan
ge in
Q3
Chan
ge in
Q4
Chan
ge in
Q5
Chan
ge in
Q6
Avg changes 2.4 0.7 1.1 1.0 1.4 0.8
avg change 3.1 0.7 1.1 1.6 0.0 0.4
7th grade
10th grade
avg change 3.2 0.8 1.0 1.0 1.6 1.61st year college (small sample size)
Q1 Q2 Q3 Q4 Michelson Q6avg change 2.6 0.9 0.6 0.4 2.7 0.1
12th grade (small sample size)
Conclusions and path forward
• Dimensional kit, including measuring tools, measurand, sample presentations, outcome surveys
• Demonstration “Laser Interferometer in a Pizza Box”, includes sample presentation
• Please check them out from the NCSLI L&D library • Use the kit and demonstration interferometer as
metrology ambassadors!• Develop additional presentations!• Provide feedback to L&D for best practices!
04/22/2023 25