Pyroelectric X-ray generator
Article Abstract:
Pyroelectric CsNO3 crystals next to a gold foil produce X-rays when the temperature is increased from 77 to 300 calories. If the temperature is reduced from 300 to 77 calories, CsNO3 becomes an electric dipole and ejects electrons from the negative end. If the temperature is increased within a temperature range that varies with crystals, the dipole ejects electrons from the positive end. L X-rays are produced by the gold foil when bombarded with electrons from the positive end. However, the generator does not produce K X-rays, indicating its 25.5 keV upper limit for ejected electrons' energy.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
How the chip changed it all
Article Abstract:
The world was changed when Gordon Moore and Robert Noyce, founders of Intel, developed the first microprocessor chip in 1971 in Mountain View, CA. The new chip could do the work of a room-sized computer and made the invention of the microcomputer possible. The history of the microprocessor is traced.
Publication Name: Life
Subject: General interest
ISSN: 0024-3019
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Sheila Dow's concept of dualism: clarification, criticism and development
Article Abstract:
Dow's concept of dualism is highlighted. The development and criticisms of the Dow's concepts is explained. The difference between the heuristic dualism and fixed dualism is also specified.
Publication Name: Cambridge Journal of Economics
Subject: Economics
ISSN: 0309-166X
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: What is the chance of Yuan revaluation?. Overnight interbank loan markets. Bank runs and investment decisions revisited
- Abstracts: On custom in economics: the case of humanism and trade regimes. The positive economics of methodology
- Abstracts: Cyclical risk, sectoral allocations and growth. The yen and Japanese manufacturing employment. Worker flows and job flows in Danish manufacturing, 1980-91
- Abstracts: Capital income taxation and welfare in a small open economy. Victorian Values
- Abstracts: Size distortions of tests of the null hypothesis of stationarity: evidence and implications for the PPP debate