Categories
Tech

Hybrid fixed wing drone goes at speeds of up to 100 kph

X PlusOne The Hybrid Fixed wing drone has come up with some Simple innovation to make Drones more and more faster.

 

I think the inspiration has come from Bell Boeing V-22 Osprey. But instead of having a tiltrotor here, we have the alternating speeds of brushless motors to tilt the drone 90 Degrees and effectively put in a flight position.

US_Navy_120209-N-RE822-273_An_Osprey_makes_a_historic_first_landing_ce

 

 

 

 

 

 

 

 

 

They are on Kickstarter trying to raise funds and have managed to reach 86% funding till now.

 

My only concern is, how can these be used for commercial purposes like, transporting stuff Or mounting cameras for shooting ?

Something that the team should think about.

Kickstarter Campaign Link:

https://www.kickstarter.com/projects/137596013/x-plusone-your-ultimate-hover-speed-aerial-camera

Categories
Tech Unix

Reblogging: My experience with using cp to copy a lot of files 432 millions, 39 TB

One morning I was notified that a disk had failed. No big deal, this happens
now and then. I called Dell and next day I had a replacement disk. While
rebuilding, the replacement disk failed, and in the meantime another disk had
also failed. Now Dell’s support wisely suggested that I did not just replace
the failed disks as the array may have been punctured. Apparently, and as I
understand it, disks are only reported as failed when they have sufficiently
many bad blocks, and if you’re unlucky you can lose data if 3 corresponding
blocks on different disks become bad within a short time, so that the RAID
controller does not have a chance to detect the failures, recalculate the data
from the parity, and store it somewhere else. So even though only two drives
flashed red, data might have been lost.

Having almost used up the capacity we decided to order another storage
enclosure, copy the files from the old one to the new one, and then get the old
one into a trustworthy state and use it to extend the total capacity. Normally
I’d have copied/moved the files at block-level (eg. using dd or pvmove), but
suspecting bad blocks, I went for a file-level copy because then I’d know which
files contained the bad blocks. I browsed the net for other peoples’ experience
with copying many files and quickly decided that cp would do the job nicely.
Knowing that preserving the hardlinks would require bookkeeping of which files
have already been copied I also ordered 8 GB more RAM for the server and
configured more swap space.

When the new hardware had arrived I started the copying, and at first it
proceeded nicely at around 300-400 MB/s as measured with iotop. After a while
the speed decreased considerably, because most of the time was spent creating
hardlinks, and it takes time to ensure that the filesystem is always in a
consistent state. We use XFS, and we were probably suffering for not disabling
write barriers which can be done when the RAID controller has a write cache
with a trustworthy battery backup. As expected, the memory usage of the cp
command increased steadily and was soon in the gigabytes.

For more visit: My experience with using cp to copy a lot of files 432 millions, 39 TB.

Categories
Tech

Elon Musk, our patent’s will not come in your way Tesla Motors

Elon Musk CEO of Tesla Motors and SpaceX just announced that Tesla Motors which holds at least 133 Patents will be allowed for  use by anyone with fair intentions.

Tesla will not initiate patent lawsuits against anyone who, in good faith. wants to use our technology.

In times when innovation is Rare and Costly, Elon Musk has set a extraordinary example by letting this happen and he has a greater vision for doing this, simply say. He wants all Or any of the competitors/manufacturers to use the technology that they have developed by intellect, sweat and money.

Here’s a Pic of the wall that held the patents

The Tesla Patent Wall at HQ, now set free

A good Close-up

The Tesla Motors Patent Wall
The Tesla Motors Patent Wall

The most humbling thing about Elon Musk is that he is completely Okay with other competitors sharing the pie of the market, as he bravely accepts that they alone can not satisfy the needs for good future cars which have a positive impact on earth.

I strongly believe that Elon and the stakeholders in Tesla Motors are equally to be thanked in this decision, as in todays capitalist environment this is a brave move.

Lets just see if other’s take some learning.

Image Source: Steve Jurvetson

Source: All Our Patent Are Belong To You | Blog | Tesla Motors.

Categories
Tech Tools

Announcing Portia, the open source visual web scraper! | Scrapinghub Blog

 

The guys at Scrapinghub have come out with an interesting new product which will be immensely helpful for Data Mining and Researchers of all type.

As officially

Portia allows you to visually configure what’s crawled and extracted in a very natural way. It provides immediate feedback, making the process of creating web scrapers quicker and easier than ever before!

Checkout the Video to see it working live. #Awesome

Original blog post here: Announcing Portia, the open source visual web scraper! | Scrapinghub Blog.

Categories
Tech

How is the World Wide Web Actually connected ?

If you ever wondered how were you able to access Google.com and the data hosted elsewhere in US.

Or even have a conversation with someone over Skype over miles of distance.

A lot of physical wiring in form of optical cables (cables that carry light signals as data).

Follow the link below to see how does the connectivity happens between nations…

via What the Internet looks like: The undersea cables wiring the ends of the Earth – CNN.com.