|Ken Novak's Weblog
Purpose of this blog: to retain annotated bookmarks for my future reference, and to offer others my filter technology and other news. Note that this blog is categorized. Use the category links to find items that match your interests.
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Friday, May 07, 2004
: "This module is a wrapper for the Google Web APIs. It allows you to do Google searches, retrieve pages from the Google cache, and ask Google for spelling suggestions." 11:03:00 PM
India's secret army of online ad 'clickers':
"A growing number of housewives, college graduates, and even working professionals across metropolitan cities are rushing to click paid Internet ads to make $100 to $200 (up to Rs 9,000) per month. "It's boring, but it is extra money for a couple of hours of clicking weblinks every day," says a resident of Delhi's Patparganj, who has kept a $300-target for the summer
" 11:02:40 PM
: "MIDlog, a J2ME client for all blogging systems that support the Blogger API.
MIDlog is open-source and GPL software," 10:34:31 PM
PMICRO Temperature recorder
: Cheezy wired temperature sensor gear that uses SNMP and ethernet for data collection. Very cheap: $200 per ethernet collection box, wired to up to 16 daisy-chained $15-25 sensors. 4:49:16 PM
Internet-Enabled Wireless Web Sensor Network (WWSN)
: "Combining direct sensor inputs and microprocessor based transmitters employing time division multiple access (TDMA) techniques, this system allows large networks of remote transmitters to communicate digital data to a single receiver. A sleep timer with random wake-up allows multiple periodic transmitters to operate on the same communications channel (418 MHz RF) with a very low collision probability. Each transmitter includes sensor signal conditioning, multiplexer, 16 bit A/D converter, microprocessor, and RF link. The transmitters are compatible with a wide variety of sensors, including thermocouples (cold junction compensated), strain gauges, load cells, torque transducers, and displacement transducers (DVRT’s).
The receiver includes a single board computer (SBC) with Ethernet capability, built in XML and HTML (internet enabled) file transfer protocols, and data storage capability. The web server interrogates the SBC from a standard web browser (MicroSoft’s Internet Explorer or Netscape’s Navigator) to receive multi-channel sensor data from the SBC in extensible mark-up language (XML) format." User manual and pricing online, currently $895 for wifi or ethernet base station, $395 for temperature/humidity node, $2495 for 3 node, base station and software." 4:21:32 PM
How Secure Is Secure?
Simple description of 802.11 and other signal processing, and how more advanced signal processing like direct-sequence spread spectrum (DSSS) can enhance security. In effect, the signal can disappear below the noise level, and only be detected by knowing where to look (which frequencies and time slots) in advance. 4:07:34 PM
Krugman on oil supplies:
"the end [the energy crisis of the 1970's] has been widely misunderstood: prices went down not because the world found new sources of oil, but because it found ways to make do with less. During the 1980's, oil consumption dropped around the world as the delayed effects of the energy crisis led to the use of more fuel-efficient cars, better insulation in homes and so on. Although economic growth led to a gradual recovery, as late as 1993 world oil consumption was only slightly higher than it had been in 1979. In the United States, oil consumption didn't regain its 1979 level until 1997.
Since then, however, world demand has grown rapidly: the daily world consumption of oil is 12 million barrels higher than it was a decade ago, roughly equal to the combined production of Saudi Arabia and Iran. It turns out that America's love affair with gas guzzlers, shortsighted as it is, is not the main culprit: the big increases in demand have come from booming developing countries. China, in particular, still consumes only 8 percent of the world's oil — but it accounted for 37 percent of the growth in world oil consumption over the last four years.
The collision between rapidly growing world demand and a limited world supply is the reason why the oil market is so vulnerable to jitters. .. In a way it's ironic. Lately we've been hearing a lot about competition from Chinese manufacturing and Indian call centers. But a different kind of competition — the scramble for oil and other resources — poses a much bigger threat to our prosperity.
So what should we be doing? Here's a hint: We can neither drill nor conquer our way out of the problem. Whatever we do, oil prices are going up. What we have to do is adapt." 8:50:35 AM