I love math, and it makes me ill every time I think about how badly it's taught in public schools.
I looked into the subject of good math books extensively, for use in home high-schooling my kids. Here are the best ones I found:
[[MORE]]Elementary Algebra, by Jacobs
Geometry: Seeing, Doing, Understanding, by Jacobs
Mathematics, A Human Endeavor, by Jacobs
Jacobs has a great knack for explaining math.
I've known several people who "hated" math, until they learned it the right way. One of them loved it so much afterwords that she went on to get her degree in math and to teach it at the college level.
Tuesday, 30 June 2009
Sunday, 28 June 2009
Telescopes
I love astronomy and astrophotography. If I had the right equipment, asteroid hunting is right up my alley.
If you can afford it, the Questar is a very nice, compact scope:
http://www.company7.com/questar/index.html
Televue also makes some very nice refractors that are less expensive than Questar:
http://www.company7.com/televue/index.html
[[MORE]]Unless you're planning to do serious astrophotography, you probably don't need much more than about 4 inches of aperture. You will be limited by atmospheric seeing, so a bigger scope doesn't buy you much.
Don't skimp on the mount or the eyepieces. A good mount can cost almost as much as the scope.
If you can afford it, the Questar is a very nice, compact scope:
http://www.company7.com/questar/index.html
Televue also makes some very nice refractors that are less expensive than Questar:
http://www.company7.com/televue/index.html
[[MORE]]Unless you're planning to do serious astrophotography, you probably don't need much more than about 4 inches of aperture. You will be limited by atmospheric seeing, so a bigger scope doesn't buy you much.
Don't skimp on the mount or the eyepieces. A good mount can cost almost as much as the scope.
Tuesday, 16 June 2009
Benefits of intermittent fasting for me
When I cut grains and refined carbs from my diet, my near-constant hunger went away within about a week, after I adapted to being in mild ketosis. I get hungry now only many hours after I wake in the morning. With a lite lunch, I get hungry again about 8 hours later for dinner, and generally feel no need for between-meal snacking. The net result is intermittent fasting that lasts about 15 or 16 hour per day.
[[MORE]]I also find, though, that a meal moderately high in complex carbs, including certain vegetables, can throw a wrench into things for a day or so. I get more hungry those days, and I also see my blood glucose go up.
It's interesting to me that one of the recommendations for diabetics from experts like Dr Richard Bernstein is to keep blood glucose within a range of about 10 points, 24 hrs a day. Yet non-diabetics often have huge swings, ranging from perhaps 80 to 140 or more over the course of a day. Due to the pro-aging effects of insulin, I am increasingly convinced that non-diabetics would also benefit from keeping their blood glucose under equally tight control.
[[MORE]]I also find, though, that a meal moderately high in complex carbs, including certain vegetables, can throw a wrench into things for a day or so. I get more hungry those days, and I also see my blood glucose go up.
It's interesting to me that one of the recommendations for diabetics from experts like Dr Richard Bernstein is to keep blood glucose within a range of about 10 points, 24 hrs a day. Yet non-diabetics often have huge swings, ranging from perhaps 80 to 140 or more over the course of a day. Due to the pro-aging effects of insulin, I am increasingly convinced that non-diabetics would also benefit from keeping their blood glucose under equally tight control.
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