What's The Greenest Insulation? It's Getting Harder To Decide Every Day Screen shot from Youtube video What's wrong with this picture? It is in a video promoting Ultra-touch denim insulation, showing an installer pushing a full-size batt into an irregular cavity. Either the insulation isn't going to work because it is compressed or it is going to pop the drywall right off the wall. The installer also isn't wearing a mask, even though the company's material safety data sheet recommends an OSHA approved air mask. Even though I got seriously schooled by an Ultratouch distributor at a home show last year, I still have problems with batt insulation; it is rarely properly installed around electric wires and other irregularities and does not seal as well as sprays. Post consumer recycled jeans are not good for the chemically sensitive, for whom this is a prime product. More on Denim Insulation:What's The Greenest Insulation? Is Sprayed Polyurethane Insulation Safe? Polystyrene Insulation Doesn't Belong in Green Building Fiberglass: Is Pink Really Green?
isc Home | SANS Internet Storm Center; Cooperative Network Security Community - Internet Security U.S. scientists develop new clean energy technology LOS ANGELES, May 26 (Xinhua) -- U.S. scientists have developed a new clean energy known as Direct Methanol Fuel Cell for future Pentagon and commercial applications, it was announced on Thursday. This novel fuel cell technology uses liquid methanol as a fuel to produce electrical energy, and does not require any fuel processing, according to NASA's Jet Propulsion Laboratory (JPL), which partnered with the University of Southern California (USC) in developing the technology. Pure water and carbon dioxide are the only byproducts of the fuel cell, and no pollutants are emitted, said JPL in Pasadena, Los Angeles. Direct Methanol Fuel Cells offer several advantages over other current fuel cell systems, especially with regard to simplicity of design and higher energy density, JPL said. Current systems rely on hydrogen gas, a substance that is more difficult to transport and store.
A Simple Way to Cut Coal Plant Carbon Emissions The same chemical reactions that allow water to carve out caves in limestone could be used to capture carbon dioxide from smokestacks, say researchers at Stanford and the University of California at Santa Cruz. The process—which uses seawater and crushed limestone to capture carbon dioxide—would be simpler than conventional carbon capture and storage (CCS) technologies, and potentially cheaper and more practical. The researchers have demonstrated the idea in laboratory tests, but not yet at an actual power plant. Conventional CCS is a complex process that involves first isolating carbon dioxide from other exhaust gases, then compressing it and shipping it to an underground storage site. As a result, the technologies are expensive and haven’t been demonstrated at a large scale (see “What Carbon Capture Can’t Do” and “Grasping for Ways to Capture Carbon Dioxide on the Cheap”). The new approach captures and stores the carbon dioxide in a single step.
Grid energy storage Simplified electrical grid with energy storage. Simplified grid energy flow with and without idealized energy storage for the course of one day. As of March 2012, pumped-storage hydroelectricity (PSH) is the largest-capacity form of grid energy storage available; the Electric Power Research Institute (EPRI) reports that PSH accounts for more than 99% of bulk storage capacity worldwide, around 127,000 MW. PSH energy efficiency varies in practice between 70% to 75%. An alternate approach to achieve the same effect as grid energy storage is to use a smart grid communication infrastructure to enable Demand response (DR). The core effect of both of these technologies is to shift energy usage and production on the grid from one time to another. Forms Air Compressed air 60 - 90% efficient Another grid energy storage method is to use off-peak or renewably generated electricity to compress air, which is usually stored in an old mine or some other kind of geological feature.
Wood gas vehicles: firewood in the fuel tank Wood gasification is a proces whereby organic material is converted into a combustible gas under the influence of heat - the process reaches a temperature of 1,400 °C (2,550 °F). The first use of wood gasification dates back to 1870s, when it was used as a forerunner of natural gas for street lighting and cooking. In the 1920s, German engineer Georges Imbert developed a wood gas generator for mobile use. Second World War The technology became commonplace in many European countries during the Second World War, as a consequence of the rationing of fossil fuels. A network of some 3,000 "petrol stations" was set up, where drivers could stock up on firewood. In 1942 (when the technology had not yet reached the height of its popularity), there were about 73,000 producer gas vehicles in Sweden, 65,000 in France, 10,000 in Denmark, 9,000 in both Austria and Norway, and almost 8,000 in Switzerland. Research programme in Sweden Fuel "Producing wood gas is not that hard", says John. Range Trailer
Using suphp To Secure A Shared Server The challenge with securing a shared hosting server is how to secure the website from attack both from the outside and from the inside. PHP has built-in features to help, but ultimately it s the wrong place to address the problem. Apache has built-in features too, but the performance cost of these features is prohibitive. This has created a gap that a number of third-party solutions have attempted to fill. One of the oldest of these is suphp, created by Sebastian Marsching. suphp: Running PHP As A Specified UserInstalling suphpConfiguring ApacheSome BenchmarksOther ConsiderationsConclusions suphp: Running PHP As A Specified User Like Apache’s own suexec, suphp is a solution that allows PHP to run as the user and group that owns any particular website on a shared hosting server. suphp consists of two components: mod_suphp, an Apache module that replaces mod_phpsuphp, a setuid binary that replaces Apache’s suexec It relies on PHP/CGI having been installed onto the server first. Installing suphp
Scientists Discover Wild Solar Energy Effect, Allows Power Without Cells Up until now scientists thought that only the electrical charge separation effects of photons were strong enough to produce energy from sunlight. (Source: Aether Wave Theory) Researchers have discovered a novel new effect which produces energy when intense light passes through an insulating material like glass, creating a strong magnetic field. New energy harvesting devices would leverage magnetism effects, rather than electric ones Mankind currently only harvests a minuscule fraction of the estimated 12.2 billion kilowatt-hours of solar energy that hits the Earth every day [source]. That's why a new breakthrough in alternative energy at the University of Michigan is so exciting. No, it's not some novel photosynthesis scheme. I. Light has two components -- magnetism and electricity. But Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics at U of M, was fascinated by this property. II. So what's the catch? III. Mr. IV.
Startup Shows Off Its Cheaper Grid Battery Startup Sun Catalytix is designing a flow battery for grid energy storage that uses custom materials derived from inexpensive commodity chemicals. It joins dozens of other companies seeking to make a device that can cheaply and reliably provide multiple hours of power to back up intermittent wind and solar power. The MIT spinoff, which hopes to differentiate itself with a novel chemistry and inexpensive mechanical systems, is testing a small-scale five-kilowatt prototype. It projects that a full-scale system, which it expects to make in 2015 or 2016, will cost under $300 per kilowatt-hour, or less than half as much as the sodium-sulfur batteries now used for multihour grid storage. Sun Catalytix CEO Mike Decelle says one advantage of the company’s technology is that it uses cheap ingredients. The active material in a typical flow battery is a metal, such as vanadium or zinc, dissolved in a liquid electrolyte. Sun Catalytix intends to pilot-test a full-scale battery in 2015.
Forget batteries: future devices could store power in wires Batteries have always been one of the biggest problems when developing small lightweight electronic devices. They're big and bulky, taking up a serious chunk of the real estate inside your smartphone or tablet. So imagine if they could be dispensed with, and replaced by a new type of internal wiring that can actually store power inside the body of the wire itself. That's the goal of a team of nanotechnology researchers at the University of Central Florida in Orlando. Professor Jayan Thomas and Ph.D. student Zenan Yu have developed a way to cover copper wires with a sheath made from alloy nanowhiskers, which then become one of the two electrodes needed to create a supercapacitor. Dr. University of Central Florida, via Treehugger