Presentation on theme: "YOU PICK TWO (or THREE) !!! PROJECT: BUILDING A BETTER WORLD Goal: To develop housing for flood and wind prone areas Science Content: Forces, Buoyancy,"— Presentation transcript:
YOU PICK TWO (or THREE) !!!
PROJECT: BUILDING A BETTER WORLD Goal: To develop housing for flood and wind prone areas Science Content: Forces, Buoyancy, Bernoulli’s Principle Engineering Focus: Constraints, Criteria, Scaling, Testing Values Focus: Sustainability, cultural imperatives, quality of life
A NEW WORLD Current world population - 7.2 billion Growth rate - 1.2% 95% of the growth is in developing or underdeveloped countries. (Statistics from the World Bank) Unprecedented demands for energy, food, land, water, transportation, materials, health care, communication and infrastructure. Engineers will be crucial in fulfilling those demands at various scales, ranging from remote small communities to large urban areas (megacities), mostly in the developing world.
Appropriate technology is small-scale technology. It is simple enough that people can manage it directly and on a local level. Appropriate technology makes use of skills and technology that are available in a local community to supply basic human needs, such as gas and electricity, water, food, and waste disposal. Three women in Gorom-Gorom, Burkina Faso with their CooKits. http://www.hipporoller.org/
The worldwide refuge situation reached 5.9 million by mid-2013 (UNHCR)
QUICK BUILD VERSION Given material and time (15 minutes)constraints can you engineer a “home” that meets the following criteria? It should be able to float when it contains “people and furniture” One wall or the roof must withstand lateral “compressor winds” Can it withstand some leaking/taking on water from tropical downpours?
Hands for the World
BIOMECHANICS OF THE HAND The basic functions of the hand can be grouped into grasping activities (latching onto objects) or non-grasping activities (touching, feeling, tapping, etc.). There is an immense range of motions that can be performed. A hand can move not only up- down (y-axis), left-right (x-axis), and forward- backward (z-axis), but can also rotate about these three axes.
Levers in the Body Muscles and bones act together to form levers. There are four parts to a lever – lever arm, pivot or fulcrum, effort and load(resistance). In our bodies: -bones act as lever arms -joints act as pivots -muscles provide the effort forces to move loads -loads are the body parts that are being moved
QUICK BUILD VERSION Given material and time (15 minutes)constraints can you engineer a “hand” that meets the following criteria? It can be “operated” with the other hand functioning as an actuator. It can pick up a packet of candy and hold it while the other hand opens it. It can pick up a Starburst and hold it while the other hand opens it.
By 2025, an estimated 1.8 billion people will live in areas plagued by water scarcity, with two-thirds of the world's population living in water-stressed regions as a result of use, growth, and climate change. (United Nations)
The UN also estimates that by 2025, 75% of the world population won’t have reliable, clean water.
The total water footprint of the average consumer in the world 3.8% of the water footprint relates to home water use 22% of the water footprint does not lie within the country of the consumer, but other parts of the world 96.2% of the water footprint is ‘invisible’, related to the products bought on the market (The majority of this is agricultural.) Source: Hoekstra & Mekonnen (2012) The Water Footprint of Humanity, PNAS 3800 liters/day
The water footprint of products 1 kg wheat1 m 3 water 1 kg rice3 m 3 water 1 kg milk1 m 3 water 1 kg cheese5 m 3 water 1 kg pork5 m 3 water 1 kg beef15 m 3 water [Hoekstra & Chapagain, 2008] (global averages)
Water footprint of one coke (250 ml) 0.25 liters water 0.25 liters for production, washing 2.5 liters for PET bottle 50 liters for sugar ___________________ 53 liters total The CocaCola Company
40 liters of water for 1 slice of bread
2500 liters of water for 1 cotton shirt
Working with a partner, choose 6 index cards. Estimate the water footprint of each and fill in your score card. (No looking it up!!) Also identify whether the product uses more blue, green or gray water. Score your results as follows (you have to show the calculation of the percentage): +/- 40% 1 points +/- 30% 2 points +/- 20% 3 points +/- 10% 4 points +/- 5% or less 5 points Correct assessment of blue, green or gray +1 for each item. Extra Bonus – whoever is closest to predicting their average daily water footprint. (+5) Highest score wins and can have all of our leftover candy!! What’s My Water Footprint Game
Build a Better Chevron Engine chevrons are attachments to the tail-end of a jet engine These shapes dampen sound coming from the engine Current flight: approx. 90dB inside the cabin BETA TEST: This lesson is currently designed to be used with a Thunder Drum. I am looking for some participants to try using a hair dryer as the sound source to see if this might be feasible in the classroom. Uses a free sound meter app (Decibel 10 th ) and MC Oscilloscope ($4.99)
Save Your Payload! MSL entered the Martian atmosphere at 6.1 m/s For seven minutes, Curiosity was exposed to the heat of entry, requiring significant heat resistance. The MEDLI (MSL Entry, Descent, and Landing) Suite of sensors gathered data about entering Mars’ atmosphere.