Shapes

Math like science is a kind of art. Parabola and sphere drawn with VTK.

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There is no housing tech

This post is about housing technology. Basically there isn't any. There is technological and other improvements for housing but in the US basically none of them are put into widespread use. There are heat exchangers that keep warmth in houses while letting fresh air in I have heard they are getting more and more common in northern Europe. There floor heating system using electricity or hot water. Floor heating is one of the most efficient systems around and are standard in South Korea. Housing can have thick walls like strawbale houses, if you don't like these modular houses built in factories have excellent insulation. There are passive heating systems that face most of the windows south and have a long overhanging roof that shades the windows from the high summer sun and lets the low winter sun in. Leaf trees planted on the south side of a house shade the windows with there leaves in summer and their bare branches let the sun in while north side planted trees keep cold breeze...
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Most efficient ways to build fitness

Some of the most efficient ways to exercise are weight lifting about 24 repetitions of each exercise to complete exhaustion and interval training like some kind of sprinting. Lower weight higher repetition weight lifting (meaning about 24 reps) done to complete muscle exhaustion (lift until you can't lift a single time more) can actually build muscle even faster low repetition with a heavier weight. A study on this is here: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0012033 N. A. Burd, et al. “Low-Load High Volume Resistance Exercise Stimulates Muscle Protein Synthesis More Than High-Load Low Volume Resistance Exercise in Young Men,” PLoS ONE, vol. 5, no. 8, p. e12033, 2010. Interval training works so well partly because you move fast turning on more fibers. Each muscle fiber in a skeletal muscle either contracts fully or not at all. You lift heavier weights or move faster by contracting/engaging more muscle fibers. So fast motions in interval training...
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In a great place - make a great place

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This is my recommendation for Swampscott's town development meeting. Swampscott is a small town in beautiful place by the ocean and I would love to be able to walk around town more. Walkable communities are healthier having lower rates of obesity and diabetes, property values are higher because people want to live in walkable communities and there aren't enough of them. To get to a walkable community we need to develop infrastructure for walking and bicycling like more sidewalks and trails. We need to build mixed use higher density living/working/shopping/recreation zones so that people live and work close to things they want to walk to. Higher density mixed use development is made by permitting taller buildings with street level shopping, office and condo living at higher levels. The higher density needs to be offset by more public green spaces which will benefit the entire community more than individual back yards. And higher density living frees up more space for public u...
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