tech

I'm a big fan of solar power. But as with anything, I like to know exactly what I'm getting. One of the big unspoken issues in the solar sector is the difference between the rated or estimated potential output of a solar system--and the actual production of kilowatt-hours. A range of factors from the margin of error in the modules, to temperature, dust and losses from wiring, conversion to AC power and any batteries all can contribute to as much as 30 percent lower actual power production--even in the first year.

Compounding this problem in my mind is … Read more

Back when I started at CNET Download as the main Mac producer, part of my job was to go out into the wild world of the Internet to scout out new Mac programs. We used to get several submissions from software developers which we added and updated regularly, but if we wanted the big name titles, we often had to do the footwork ourselves. This meant we had to comb developer Web sites and other download sites to see what was out there. Whatever we found we would add to the software library.

Many things have changed over the years … Read more

The 2007 Frankfurt auto show officially opens to the public on Saturday, but we've been getting a preview of the automotive delights on display for the past couple of days. CNET Car Tech Senior Editor Wayne Cunningham has been busy scouring the show floor to bring you a whole slew of picture galleries. His roundup of the show's speed kings includes close-ups of the V-8 BMW M3, the Porsche 911 GT2, and the Mercedes C63.

Meanwhile, Frankfurt is showing off its fair share of concept cars, including the futuristic Nissan Mixim and the Porsche Cayenne hybrid. Among the … Read more

The new models and concept cars just keep on coming at the 2007 Frankfurt auto show. One notable trend at this year's event is the willingness of luxury German automakers to finally embrace hybrid technology, with Audi, BMW, Porsche, and Mercedes all either announcing production hybrids or showing off advanced hybrid concepts. Meanwhile, the 2009 Jaguar XF shows that concept technology can make it off the auto show floor, as the latest Big Cat retains its futuristic shifter for production. On the subject of cabin gadgetry, automotive equipment manufacturer Siemens VDO showed off its next-generation in-car touch screen technology, … Read more

DAVIS, Calif.--What kind of clean tech product will thrive over the long term?

"Something that doesn't defy laws of physics, and there are plenty of those," said Rodrigo Prudencio, a partner with Nth Power LLC. The venture capital firm helped Evergreen Solar and Imperium Renewables to get off the ground.

Nobody at the AlwaysOn Going Green conference was making bold predictions about what might become the Google of green tech, but the sector is expected to continue expanding at a rapid clip.

Clean tech companies receive the third largest amount of venture capital, a staggering increase … Read more

I use TechSmith's Snagit screen-capturing tool (review) on a daily basis to gather all sorts of shots for posts and archival purposes. It works great at getting those pixel-precise sizes you might be going for, along with taking a step or two out Windows' less-than-stellar built-in print screen function. Today I've been playing with a small download called Clip2Net. It's a free and simple screenshot program with built-in Web uploading for screenshots AND image files. It's not at all as advanced as Snagit, but if you're in the market for a relatively easy way to take and host screenshots, or share a roll of pictures with friends, Clip2Net is a promising hybrid solution.

Setup is simple: Just download and install the less-than-1MB file and you're good to go. You can start capturing right away, either in regions or the entire screen at a time. Registering and plugging in your login credentials lets you upload your shots to a Web folder that saves all your shots. Likewise, if you'd like to stay anonymous, Clip2Net will provide you with a URL where your shot is being hosted--although keep in mind that if you lose that URL, you won't be able to track it down again. … Read more

We've been trawling the floor on the first day of the Frankfurt auto show, and there have been plenty of new model launches and concept-car unveilings to keep us busy. Mercedes-Benz delivered on its promise to take the wraps off a fleet of new cars, including hybrid versions of its C300 wagon and its ML450 SUV, as well as its F700 research vehicle. Volkswagen and BMW also took advantage of being on their home turf, with the latter unveiling its partnership with Google for a local-search-enabled in-dash navigation system, and VW showing off its Up concept, an ultra-compact rear-engined … Read more

We're not convinced about the wisdom of this one. GM is using this week's Frankfurt auto show to reiterate its commitment to alternative fuel cars with the unveiling of the Opel Flextreme, a concept plug-in car that builds on the buzz of the E-Flex drive train from the Chevy Volt. The car itself relies on a series hybrid drive train, which combines a lithium-ion powered-electric motor with a biodiesel combustion engine that is used solely for running the electric motor when the battery's charge runs out.

However, as blue-sky as the vehicle's power train may be (… Read more

DAVIS, Calif.--Here's a novel business plan. Prairie Village, Kansas-based Nowa Technology has come up with a wastewater treatment plant that sucks out materials from wastewater and some of these removed products can be consumed as a diesel additive. It depends on what's in your wastewater, but Nowa CEO Richard Nelson says you find the fuel there quite a bit.

You can mix it 50-50 with diesel and get about the same amount of energy as pure diesel, according to Nelson. (I ran into him in the hallway at the GoingGreen conference taking place here.) This is different … Read more