http://economistsview.typepad.com/economistsview/2009/04/just-how-progressive-is-the-tax-system.html
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Monday, April 13, 2009
Tax share
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Friday, September 26, 2008
Thursday, February 28, 2008
Sunday, February 24, 2008
LED
test
The coming LED lighting revolution
LED lighting will eventually replace CFLs, halogen and incadescent lighting. This post will track the field.
Here are a few sources of good information:
Energy Star Requirements
LED magazine
Caliper testing
LED manufacturers
LED packaging manufacturers
Everlight
LED lamps
LED power supply
Catalyst
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Wednesday, December 19, 2007
Income and Health
Check out this talk by Hans Rosling: Debunking third-world myths with the best stats you've ever seen.
Try the software here
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Saturday, December 15, 2007
Housing Graphs
A few charts pointed to by Paul Krugman
Housing Charts: Genesis of a Crisis
Price to Rent ratio
Homeowners With Negative Equity
Equity distribution among homeowners
Historic Housing Prices
Price to cost
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Wednesday, December 12, 2007
The Ethyl-Poisoned Earth
At the turn of the twentieth century, as the age of automobiles was afoot, the newfangled gasoline-powered internal combustion engine began to reach the limitations of the fuel that fed it. As higher-compression designs were tried, an engine-wrecking condition known as "knock" or "ping" would invariably develop. Though they didn't know it at the time, the noisy destruction was caused when the the increased heat and pressure prompted the air/fuel mixture in the cylinder to detonate all at once as opposed to an orderly burn. In spite of this problem, there was a demand for high-compression designs since they provided increased horsepower and fuel efficiency. The latter was particularly appealing in light of America's forecasted fuel famine.
From Damm Interesting
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Tuesday, December 11, 2007
Plan for getting elected
Basic Principles
- Our common bond is the rule of law
- Governance is by the people and for the people and the earth
- Trust is the scaffold of peaceful existence.
- Lead the way towards meaningful progress
- Measure results with science and diligence
- Protect basic human and environmental rights
- Promote the common good
- Provide common trust
- Provide for health and income security
- Aggression and repression
- Promotion of fear
- Commerce
- Theft of public and private funds
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Sunday, December 9, 2007
Compact Florescent and LED lamps
LED bulbs may be finally here. Check out the pharox LED bulb, or buy it here
The table below compares the LED bulb to 40W, CFLs and incandescent bulbs plus 75 W CFL bulbs data.
| cost | watts | Lux | Lumens | lifetime (hrs) | Hg (mg) | Time on/day (hrs) | cost | hrs/yr | kwh/yr | $/KWh | Energy $/year | Bulb $/year | Total $/year | 1year$ | 10 yrar $ | carbon /year (Kg) | mercury /year (mg) |
| led | 4 | 230 | 50,000 | 0 | 10 | $59.00 | 3,650 | 15 | $0.12 | $1.75 | $4.31 | $6.06 | $60.75 | $76.52 | 6.7 | 0.3 | |
| cfl | 9 | 230 | 6,000 | 5 | 10 | $3.00 | 3,650 | 33 | $0.12 | $3.94 | $1.83 | $5.77 | $6.94 | $42.42 | 15.1 | 3.8 | |
| incadescent | 75 | 975 | 230 | 1,000 | 0 | 10 | $1.10 | 3,650 | 274 | $0.12 | $32.85 | $4.02 | $36.87 | $33.95 | $329.60 | 125.6 | 6.4 |
| N:vision | 19 | 925 | 1,200 | 6,000 | 5 | 10 | $5.97 | 3,650 | 71 | $0.12 | $8.50 | $3.63 | $12.13 | $14.47 | $90.94 | 32.5 | 4.7 |
| westinghouse | 18 | 840 | 1,200 | 6,000 | 5 | 10 | $6.00 | 3,650 | 64 | $0.12 | $7.67 | $3.65 | $11.32 | $13.67 | $82.65 | 29.3 | 4.5 |
| Phillips Marathom | 21 | 865 | 1,200 | 6,000 | 5 | 10 | $3.00 | 3,650 | 76 | $0.12 | $9.11 | $1.83 | $10.94 | $12.11 | $94.10 | 34.8 | 4.8 |
| max lite | 20 | 900 | 1,200 | 6,000 | 5 | 10 | $4.50 | 3,650 | 74 | $0.12 | $8.89 | $2.74 | $11.63 | $13.39 | $93.41 | 34.0 | 4.8 |
| sylvania | 19 | 822 | 1,200 | 6,000 | 5 | 10 | $5.75 | 3,650 | 69 | $0.12 | $8.28 | $3.50 | $11.78 | $14.03 | $88.53 | 31.7 | 4.7 |
| westinghouse doft | 18 | 830 | 1,200 | 6,000 | 5 | 10 | $6.00 | 3,650 | 65 | $0.12 | $7.80 | $3.65 | $11.45 | $13.80 | $83.96 | 29.8 | 4.6 |
| GE | 20 | 843 | 1,200 | 6,000 | 5 | 10 | $5.00 | 3,650 | 72 | $0.12 | $8.67 | $3.04 | $11.71 | $13.67 | $91.72 | 33.2 | 4.7 |
And some good info on mercury in CFL
How much mercury is contained in a CFL?
Each bulb contains an average of 5 milligrams of mercury, “which is just enough to cover a ballpoint pen tip,” says Leslie, associate director of the Lighting Research Center at Rensselaer. “Though it’s nothing to laugh at, unless you wipe up mercury [without gloves] and then lick your hand, you’re probably going to be okay.”
Approximately 0.0234 mg of mercury—plus carbon dioxide, sulfur dioxide and nitrogen oxide—releases into the air per 1 kwh of electricity that a coal-fired power plant generates. Over the 7500-hour average range of one CFL, then, a plant will emit 13.16 mg of mercury to sustain a 75-watt incandescent bulb but only 3.51 mg of mercury to sustain a 20-watt CFL (the lightning equivalent of a 75-watt traditional bulb). Even if the mercury contained in a CFL was directly released into the atmosphere, an incandescent would still contribute 4.65 more milligrams of mercury into the environment over its lifetime.And some info on lux and Lumens
The lux (symbol: lx) is the SI derived unit of illuminance or
illumination. It is equal to one lumen per square metre.
• sunlight on an average day ranges from 32 000 to 100 000 lux
• TV studios are lit at about 1 000 lux [i.e. 1000 lumens
per square metre]
• a bright office has about 400 lux of illumination
• At sunset and sunrise, ambient outdoor light is also about
400 lux (if the sky is clear).
• moonlight represents about 1 lux
• starlight measures a mere 0.00005 lux
And here is the rest of it.
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Saturday, December 1, 2007
sets
Math links on set theory, etc
- Topoi by Goldblatt
- Topos by John Baez
- Everything -
And here is the rest of it.
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