This preview of next week’s new episode of Mythbusters on Discovery previews host Adam Savage sneaking through rooms setup like the DOOM video game complete with old-school growls, plasma guns, and chainsaws. Next week Jamie and Adam will be taking on video game myths and will be interesting to see what they come up with and could possibly be plausible or confirmed in a world design to be pure fiction…[Unfortunately because Discovery’s video embeds do not support loading on an encrypted page you will need to follow this link to see the video preview.]
Phys.org reports on a new algorithm developed by a doctoral student at École polytechnique fédérale de Lausanne (EPFL) that changes frequencies and bandwidth usage based on the type of data packets being sent and received. Many routers today are set by default to use channel 6 of the 2.4 GHz frequency which causes a build-up of WiFi traffic on that channel. The problem is that many other channels overlap and use much of the same frequencies. In fact, while there are 14 total channels made available in the 2.4 GHz range, many countries ban the use of some of those frequencies. In the United States (US) channels 12 through 14 are not able to be used yet are the ones with the greatest frequency gap between channels. In effect, because the frequency bands overlap you can argue that there are really only 3 available spaces to transmit data in the 2.4 GHz WiFi band.
The graph above shows the frequency channels for the 2.4 GHz WiFi range and how the channels overlap. Most routers are set to channel 6 by default and while they may change channels depending on availability they generally pick a channel and stick with it. In addition, many routers will use up to 8 of these channels at the same time. The problem is that this rather small range gets filled up in areas where many routers are being run and essentially cause a traffic jam of data. The other problem is that because routers will often stick with a set channel other may actually be open and unused.
The new algorithm would determine the bandwidth requirements of the data being sent and received and would select an appropriate channel and width. It essentially removed the idea of “channels” and instead divvies up the available frequency range into “lanes.” Some of the lanes are specialized similar to having a carpool or bike lane. As an example, if all you did was check your e-mail and browse a few websites you don’t need much bandwidth. The new algorithm would utilize a small amount of bandwidth – say within channels 1 and 2 – for just website browsing and email. Videos such as Vimeo and YouTube, which require much more bandwidth, may get a large chunk of channels 6 through 10 to use, and the remaining could be used for various other purposes such as websites with larger images, chat programs, and cell-phone updates. It spreads out the use over the available bandwidth and specialized certain areas for things like low-bandwidth data such as web and email, cell-phone updates, and high-bandwidth videos. The developer claims that it could increase typical router throughput by up to seven times (7X).
Phys.org reports on how not everyone is being hurt by lower gas prices. In addition to giving middle-class America a well-deserved break on rising prices, farmers and ranchers are reaping the benefits of low gas prices and finally refilling the fuel tanks they have kept near-empty since prices soared a number of years ago. Farmers have been sticking with lower-maintenance crops to save on fuel are planning on planting more higher expenditure crops such as corn and rice since the cost to cultivate, plant, rear, harvest, and deliver are not eating into their pocket books as deeply as in recent years. Similarly for ranchers, the cost to raise and feed cattle hinges a lot on fuel prices as it takes many farm vehicle hours (tractors, balers, planters, fertilizers, sprayers, trucks, etc) to feed, move, and deliver farm animals as well as to farm the hay, silage, and grains that they consume. [quote align=”right” width=”40%”]”However, the other side of the coin is that while we have had a collapse in the oil market, we also have had a collapse in the grain market.”[/quote]
High gas prices and low crop prices in recent years have eroded profit margins for farmers and have lead to price increases at the supermarkets. Even though consumers won’t see lower food prices it will likely mean the price increases may slow in the midterm. It’s also noted that transportation cost only contributes a small percent to food prices. Much of the cost comes from the cost of recent natural disasters such as droughts, frost, and flooding that occurred in farm areas. Disasters and market price fluctuations along with production costs (which include fuel used on the farm) make up the bulk of the cost of food.
After going without a website for quite a while I finally put up a new site that I will use for public posting of items just in general as well as for technology posts (instead of just spitting out status updates on Facebook, Google+, and LinkedIn). I did not (and still don’t) have much available… Continue reading New Website