Minggu, 01 September 2013

EU Proposes Satellite Based Speed Limiters

A great demonstration of how the Europeans are not necessarily worth emulating. The EU has proposed ISA (intelligent speed adaptation) based on GPS or sign reading cameras, which would first warn a driver and then automatically slow a vehicle down, if they were exceeding local speed limits.

The scheme would work either using satellites, which would communicate limits to cars automatically, or using cameras to read road signs. Drivers can be given a warning of the speed limit, or their speed could be controlled automatically under the new measures.

Something like this would simply be laughed out of Congress in the States. But in Europe, the EU central regulatory agencies have a lot of power, and top-down regulation is a way of life.

Source: Telegraph

Jumat, 30 Agustus 2013

Diesels: Good MPG, Less So Carbon

I have heard man advocates of small diesels moan that we "just don't get it" here in the U.S. and we need to be more European, and somehow encourage light duty diesels.

What the compression ignition lovers don't realize is that the U.S. policy is very much now based around global warming and carbon reduction, whereas it used to be about reducing oil consumption for geopolitical reasons (OPEC etc.)

So, let's look at carbon emissions:

1 gallon of gasoline when burned will emit approximately 19.64 pounds of CO2.
1 gallon of diesel will emit approximately 22.38 pounds of CO2.

Diesel is about 14% more carbon emitting than gasoline.

But, a diesel engine is about 30% more fuel efficient than a similarly sized gasoline engine. So if we do the math, a similarly sized diesel powered car will emit about 14% less CO2 than a similar diesel car. Not bad, but not huge.

Meanwhile, diesel fuel offers no advantage in the U.S. in cost (it is more expensive than gasoline by about 30%), and the vehicles cost more due to the diesel hardware premium.

Senin, 26 Agustus 2013

Tesla's Extra 0.4 Star

Tesla is trumpeting the Model S' excellent performance in NHTSA's safety tests. Tesla says that the model S has achieved a combined rating of "5.4 stars":

Palo Alto, CA � Independent testing by the National Highway Traffic Safety Administration (NHTSA) has awarded the Tesla Model S a 5-star safety rating, not just overall, but in every subcategory without exception. Approximately one percent of all cars tested by the federal government achieve 5 stars across the board. NHTSA does not publish a star rating above 5, however safety levels better than 5 stars are captured in the overall Vehicle Safety Score (VSS) provided to manufacturers, where the Model S achieved a new combined record of 5.4 stars.

This is very odd publicity, to me. NHTSA awards star ratings as integers, and 5 stars is the most you can get. A 5 star rating means that you have less than a 10% chance of serious injury in a serious accident, according to NHTSA's statistical model.

You can't get more than 5 stars, awarded by NHTSA.

Tesla is just trying too hard, here, I think. A 5-star result is excellent, and they should proudly publicize it.

Rabu, 21 Agustus 2013

Here, there and everywhere: Google Keep reminds you at the right time

Notes are a good way to keep track of all you have to do, but most of us need a little nudge now and then. Google Keep can remind you of important tasks and errands at just the right time and place. For example, Keep works with Google Now to remind you of your grocery list when you walk into your favorite grocery store, and nudges you on Thursday night to take out the trash.

To get started, select the �Remind me� button from the bottom of any note and choose the type of reminder you want to add. You can add time-based reminders for a specific date and time, or a more general time of day, like tomorrow morning. Adding a location reminder is incredibly easy too�as soon as you start typing Google Keep suggests places nearby.


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Of course, sometimes plans change. If you get a reminder you�re not ready to deal with, simply snooze it to a time or place that�s better for you.



 

It�s now even easier to get to all of your notes using the new navigation drawer, which includes a way to view all of your upcoming reminders in one place. And for people who want more separation between their home and work lives, the drawer also lets you easily switch between your accounts. 


And finally, we've made it easier to add your existing photos to a Google Keep note on Android. When you tap the camera icon you can choose between taking a new photo or adding one you already have from Gallery.

The new update is gradually rolling out in Google Play, and available now on the web at http://drive.google.com/keep and in the Chrome App.


Posted by Erin Rosenthal, Product Manager

Jumat, 16 Agustus 2013

Ford's C-Max Debacle Explained

Ford yesterday announced that it was re-stating the fuel economy label of the C-Max hybrid, from 47 city / 47 highway /47 combined to a still very good but not as impressive 45city / 40highway / 43combined. Note the large decline in the highway number.

So what happened? Did Ford cheat the test? Not really.

What happened was that Ford used the Fusion Hybrid test results to certify the C-Max, which they are allowed to do according to EPA regulations. The EPA regs allow manufacturers to certify vehicles as a group if they are in the same weight class and share powertrains.

Here is the EPA's short report on the matter. An excerpt:

Ford based the 2013 Ford C-Max label on testing of the related Ford Fusion hybrid, which has the same engine, transmission and test weight as allowed under EPA regulations. For the vast majority of vehicles this approach would have yielded an appropriate label value for the car, but these new vehicles are more sensitive to small design differences than conventional vehicles because advanced highly efficient vehicles use so little fuel.

In this case, EPA's evaluation found that the C-Max's aerodynamic characteristics resulted in a significant difference in fuel economy from the Fusion hybrid.

Was this intentional, a case of Ford using the higher number for marketing purposes? Or was it a case of simply not knowing that the C-Max would test out so much differently? I have no idea. But I think in the future, Ford and other carmakers are going to be more careful about publishing fuel economy numbers based on assumptions, after this PR disaster.


Kamis, 15 Agustus 2013

Tesla Quality Checking

An interesting insight into Tesla's assembly and delivery process over at Wired, here.

Tesla is testing every car they build with a battery of tests which takes a whopping 5 hours to complete. This compares with the end-of-line testing of a true high volume mass production auto plant, which takes typically several minutes. At the end of the assembly line, the completed car is run on a rolls machine (chassis dyno) which takes the car through an automated test sequence which spot checks the engine, brakes, transmission, and other systems. There are also final visual inspections.

And that's it. In a modern plant, the quality checks and reliability are built into the assembly process and design itself. Most cars fire up at the end of the line and are ready for a consumer to drive them 150,000 miles.

If Toyota, for example, took 5 hours to test and quality check each Lexus they built, they would not be able to produce many cars, and the plant would not make money.

Is Tesla's extensive end-of-line testing due to a lack of confidence in upstream processes and parts?

If Tesla hopes to be a major player, they will need to increase throughput and reduce in-plant time. They won't be able to check each car for 5 hours.

Jumat, 09 Agustus 2013

Get ready for college with textbooks on Google Play

Heading to college? Be prepared for the typical rites of passage: decorating your dorm room, choosing your classes and buying textbooks. And when it comes to buying textbooks from the campus store, some things never change like long lines, limited supplies and heavy backpacks. Or do they?

Rolling out this week, you can now rent or purchase digital textbooks from the Books section on Google Play. We have a long list of publishing partners, and we�re launching with a comprehensive selection of higher education titles from science and mathematics to history and English, and everything in between.

All your textbooks, anywhere you go 
With digital textbooks, there�s no need to worry about which ones you have with you and which ones you left in your dorm room. Because your library is stored in the cloud, you have instant access to the titles you need�when you need them�on your Android tablet, phone, iOS device and on the web. Now an overstuffed backpack is a thing of the past with all your textbooks weighing as much as the device you�re reading them on.



Take great notes, stay organized 
With the Google Play Books app, you have convenient tools at hand to make studying simpler and faster. You can instantly search within a textbook for a particular word or phrase, bookmark chapters and pages, highlight and annotate key passages and get quick access to dictionaries, translation tools, Wikipedia and Google search.



Rent and save 
Need your textbooks for just a semester or two? You can rent any textbook on Google Play for six months and save up to 80% as compared to buying print textbooks.

Shop for textbooks today on Google Play, and learn more at our Google in Education site.

Posted by Scott Dougall, Director, Product Management