Why Don't Electric Cars Have Multi-Gear Transmissions?
One of the biggest differences between electric cars and their conventional counterparts has to do with the drivetrain. An internal combustion vehicle has a multi-speed gearbox with numerous ratios; nearly every electric car has a single-speed transmission.
Implicitly, this makes sense. An electric motor delivers its maximum torque at zero RPM. Unlike an internal combustion engine, it doesn't need a system to disconnect it from the drivetrain to allow it to idle while the vehicle is stopped. But there's a more in-depth explanation to be had here, and it's fascinating.
Watch the video that explains it at http://www.roadandtrack.com/new-cars/car-technology/a12019034/why-dont-electric-cars-have-multi-gear-transmissions/
|Why Don’t Electric Cars Have Multi-Gear Transmissions?
Most electric cars have a single gear ratio. You probably understand the basic reasons for this, but the math is still super fascinating.
It’s harder than you think to get your smartphone stolen in South Africa
f there’s one thing you can count on in South Africa, it’s that if you need something stolen, you don’t have to try hard to make it happen, right?
It turns out our countrymen are honest and caring people, and my efforts to get a smartphone stolen multiple times failed miserably.
|It’s harder than you think to get your smartphone stolen in South Africa
Turns out our country is home to many kind and considerate people.
How to Install Linux in Windows With a VMware Virtual Machine
You’ve tried Linux from a live CD. Now you want to install it, but you’re unsure about dual booting. The sensible option is to install your chosen Linux operating system in a virtual machine (VM).
This means that a software environment replicates the conditions of a hardware environment: a personal computer. The environment is based on the hardware of your physical PC and limited only by the components within. For instance, you couldn’t have a virtual four core CPU on a processor with two cores.
However, while virtualization can be achieved on many systems, the results will be far superior on computers equipped with a CPU that supports it.
Several virtualization tools are available that make it easy to install Linux operating systems (OS) and there are many in Windows.
VMware produces the most accomplished virtual machine applications. Let’s find out how to install Linux in Windows with VMware Workstation Player.
I certainly find VMware Workstation to be more refined and better integrated on my MacOS than Oracle's VirtualBox.
|How to Install Linux in Windows With a VMware Virtual Machine
Do you want to install Linux, but can’t leave Windows? Try a virtual machine to run your favorite version of Linux inside Windows. We show you how to set up VMware Workstation Player.
Public charging stations: Can South Africa support electric cars?
Around the world, support is growing for electric cars. Automakers are delivering more electric models with longer range and lower prices, such as the Chevrolet Bolt and the Tesla Model 3.
China has set aggressive targets for electric vehicle sales to curb pollution; some European countries aim to be all-electric by 2040 or sooner.
Those lofty ambitions face numerous challenges, including one practical consideration for consumers: If they buy electric cars, where will they charge them?
In South Africa, there are three fully electric vehicles on sale in the market: BMW's i3 and i8, and the Nissan Leaf. Various manufacturers have several battery-hybrid vehicles available locally, including Volvo and Mercedes-Benz.
Nissan South Africa says: "In Gauteng there are more than 90 EV charging stations. These are available at shopping centres and office blocks. "There are 9 Nissan dealerships with EV charging stations, 7 of them also sells Nissan LEAF. We also have the memorandum of understanding (MOU) with BMW where we can tap into each other’s charging network. Cape Town is also catching up with various charging stations installed across the city."
Bottom line is SA has a very long road ahead of itself still for EVs and with little government incentive at this stage, it is not likley to pick up very soon…
|Public charging stations: Can South Africa support electric cars?
Electric cars are gaining momentum but charging infrastructure still needs to catch up globally. Can South Africa support battery-powered cars?
Italian-style coffee could halve the risk of prostate cancer
Key takeaways here are that this is about caffeinated coffee and the traditional Italian style of preparation (boiled under pressure, no paper filters). This means a 'Moka pot' or in SA we refer also to percolated coffee. See how this coffee is prepared at https://bluebottlecoffee.com/preparation-guides/bialetti-moka-pot and more on Moka pots at https://en.wikipedia.org/wiki/Moka_pot.
|Italian-style coffee could halve the risk of prostate cancer
Drinking at least three cups of Italian-style coffee every day may lower men’s risk of prostate cancer by more than 50 percent, new research suggests.
Foxit Reader – The free PDF Reader for the Connected World
If you're sick of having to open PDFs in your web browser or Microsoft's simple Reader app, take a look at Foxit. This free PDF software lets you view, sign and annotate PDFs before sharing them.
Foxit Reader makes navigating large, cumbersome PDFs easy, and its tabbed interface lets you work with several files at once.
Note the product is free to use but not open source.
|Download of the day – Foxit Reader
Read, create, annotate
The MusixMatch Desktop Lyrics App Is Available for Linux
If you used to use the Spotify lyrics feature you will already be familiar with Musixmatch’s main USP: synchronized lyrics.
With a single click, you could see lyrics scroll up the screen in sync with the playing song, perfect for both impromptu desk-based karaoke sessions to well-known classic, as well as learning lyrics to new tracks by your favourite artists.
Another click lets you view full lyrics as a static, scrollable page.
Sadly Spotify removed lyrics functionality from all of its apps last year, as its deal with lyrics database Musixmatch came to an end. Spotify says it plans to make ‘improvements’ to its lyrics support in the future, but over a year on we’re yet to hear so much as squeak about the how and when.
But the Musixmatch app fills the lyrical void in the meantime — and it works well on Linux. A desktop Musixmatch app launched on Windows and mac app earlier this year.
|The MusixMatch Desktop Lyrics App Is Available for Linux
This weekend I learnt that the Musixmatch desktop app is available for Linux! Not that Linux users are short of desktop lyrics apps. We’ve written about s
Root Certificates and HTTPS Explained, All You Need to Know
Encryption has a simple role in the digital world: wrap data in a cloak of security so only the intended recipient can read it. The process is a lot like creating a key and a lockbox for every piece of information that leaves your computer. The cryptography behind the process is incredibly complex, as is the process used to initiate the exchange and verify keys. After all, creating an unbreakable lock doesn’t do you much good if anyone can get ahold of the key.
This is where certificates come into play. These tiny files are a fundamental part of public key cryptography used by browsers and HTTPS sites to validate certain types of encryption. In other words, certificates ensure everyone is who they claim to be, preventing malicious hackers and invasive third parties from stepping in and spying on your activity.
Root certificates sit at the heart of the entire certificate system to make sure they operate as intended. It’s an intricate world with a lot of jargon to wade through, but knowing how certificates work can give you a much better understanding of how the internet operates on a day to day basis.
An easy to follow guide can be found at http://www.addictivetips.com/vpn/root-certificates-explained/
Free DevOps Tools Engineer Beta Exam by Linux Professional Institute in Canada, Poland and South Africa…
Free DevOps Tools Engineer Beta Exam by Linux Professional Institute in Canada, Poland and South Africa
Register now for the DevOps Tools Engineer Beta Exam to influence how system administrators and developers like you around the globe will be recognized for in-demand DevOps skills.
About the DevOps Tools Engineer Beta Exam:
– Play a role in shaping the final exam
– Be one of the first to obtain the LPIC-OT DevOps Tools Engineer Certification
– Write the beta exam for free
Register at http://www.lpi.org/ShapeTheFuture/. More info too about LPIC-OT DevOps Tools Engineer Objectives at https://wiki.lpi.org/wiki/LPIC-OT_DevOps_Tools_Engineer_Objectives_V1.
|Linux Professional Institute – DevOps Tools Engineer Beta Exam Registration
Now’s your chance. Shape the future. Register now for the DevOps Tools Engineer Beta Exam to influence how system administrators and developers like you around the globe will be recognized for in-demand DevOps skills. About the DevOps Tools Engineer Beta Exam: Play a role in shaping the final …
Parked electric cars earn $1 530 feeding power grids in Europe and help balance the grid
A year-long trial in Denmark is showing that utilities can use parked electric vehicles (EVs) as spare batteries, and those EVs can earn quite a bit of money for their owners from the utilities.
In an interview with Bloomberg New Energy Finance, Nissan Europe’s director of energy services, Francisco Carranza, said that a fleet of 10 Nissan e-NV200 vans has earned €1,300 ($1,530) over the year.
Electricity grids around the world are facing an era of rapid change as more electric vehicles hit the road and as grid supply changes. For grid managers, sometimes small amounts of power are necessary to regulate current frequency and keep the grid working. At the same time, if a lot of electric vehicles draw power from the grid concurrently (for example, when they’re parked at home at night, or when they’re parked at work during the day), that threatens to change how grid operators plan to meet demand, as well.
Researchers and grid managers have theorized that vehicle-to-grid connections could help solve some of these problems. By installing two-way connections where an EV could charge its battery and send power back to the grid when it’s needed, an electric car battery increases its value and makes electricity infrastructure more stable.
My note: There are more and more reasons why older grids need to get with the times to cater for new consumer demand as well as renewable energy generation.
|Parked electric cars are earning money balancing the grid in Denmark
Vehicle-to-grid system could offer frequency response, incentivize electric ownership.