Witricity : wireless electricity

The seed which was sown in early 1900’s by Nicola Tesla started germinating in 2007 and is ready to spread its roots deep into the technological world. From the past days the transmission of messages has been developed in a significant process from letters to telephone, telephone to mobile, mobile to mails through internet. And these are facilitated by the electronic appliances such as mobiles, computers, laptops etc., like the evolutionary development creating revolution in the field of communication, scientists and technologists started a search which will soon turn our planet into an adobe of electricity. This search was stopped at Witricity (wireless +electricity).

Witricity, a portmanteau for wireless electricity, is a term coined initially by  Dave Gerding in 2005 and used by an MIT research team led by Prof. Marin Soljačić in 2007, to describe the ability to provide electrical energy to remote objects without wires.

Wireless power transmission is the process that takes place in any system where electrical energy is transmitted from a power source to an electrical load, without interconnecting wires in an electrical grid.

Now we shall discuss whether the transmission of power without wires is a theory or a reality. 

Every technology will have its own merits and demerits. We have to convert those demerits into merits and welcome the innovative ideas for making the life of man easier, as the budding technologists of 21^st century. Monthly electric utility bills from old-fashioned, fossil-fuelled, loss prone electrified wire-grid delivery services will be optional, much like “cable TV” of today. In the 21st century, “Direct TV” is the rage, which is an exact parallel of Tesla’s “Direct Electricity.”

Top 10 drawing/sketching applications for PC : 2013

Drawing/sketching is the most coolest art ever. Every time art gets a new direction with changing era. Still there are many online / offline applications for a artist but we have shortlisted the top 10 among the best of the best .
    
       when you will try any of these below you will love drawing so world news express proudly presents the top 10 :

 10#Skencil:

     
       The free software interactive vector drawing application christened simply as Skencil is a great option to rely on especially when you are on the lookout for flexible diagram and illustration tools. Some of its major attributes read as transformed text and images, gradient fills, bézier curves, blend groups, ellipses and the ability to write EPS files. Some of the platforms that currently support the software are FreeBSD, Solaris 8, 9, Mac OS X and GNU/Linux. And did we mention that it’s absolutely free to use Skencil?

09#CorelDraw Graphics Suite X6 :

    The vector graphics editor known as CorelDraw Graphics Suite X6 makes its way next into our drawing software roster. It ports along a whole slew of great tools that allows you to create works of art, all on a virtual canvas. Some of these features include professional graphic design tools, website design software, content-rich images and fonts, and photo-editing capabilities.

08#Paint.NET :

     One of the best free apps you'll ever find, Paint.NET offers you loads of powerful tools and special effects in an intuitive interface.

07#Sketch Master :

     

    One of my personal favorites. Create sketches out of any photo. Use one of the many brushes provided or just let the random settings generator come up with a sketch for you.

06#Artweaver 

      A free drawing tool that offers a wide range of brushes and layers and can load up plugins. Accessible to beginners.

05#Google Sketchup Pro

 

        Easy to use yet very powerful, it lets you create realistic 3d models. Good for architects and field planners.

04#Facial Studio :

       You can use this tool to quickly draw up anybody's face. Just scan a portrait, let Facial Studio analyze it and you'll then be able to change anything from the skin texture to chin, nose or hair.

03#OpenCanvas :

          When we talk about art & sketch and...This is more of a sketching app. With lots of highly realistic brushes it is a unique and beautiful thing. The program is very similar to Photoshop it uses layers & offers  friendly interface easy for newones to handle OpenCanvas.

02#Manga Studio :

        Do you ever wanted to recreate Ranma 1/2, Dragonball Z or Astro Boy or like these bla..bla..bla..? Now Create your own anime with this Manga Studio, which has more than 3,200 screen tones and 90 different templates.

NO1#Toon Boom Studio :

     BOOM!!!

                    Toon Boom Studio is an animation program. It's easy to use if you know how it works. You just need to have Toon Boom Studio, and a draw tablet. I only explain how you can make a simple animation, but on the internet there are hundreds of websites about Toon Boom Studio. Its totally Aimed at people in the animation industry & this program lets you create cartoons in the cut-out way with motion paths.

Servo motors and robotics

Introduction to Servos :

The servo motor is a specialized motor that may be commanded to turn to a specific position. The servo motor consists of a DC motor, a gear reduction unit, a shaft position sensor, and an electronic circuit that controls the motor’s operation. The next figure shows a typical servo motor used or RC cars or small mobile robots.

closed-loop servos :

Unmodified servos are closed loop in the sense that there is a feedback mechanism that allows the servo to move to a specific angle. Servo motors use a standard three-wire interface consisting of a power, ground, and control line. The power supply is typically 5-6 volts. The control line expects a periodic control pulse (pulse train) no faster than 20 milliseconds. This means that you should not send pulses faster than 20 ms. Pulses slower than 20 ms will work, but you will not get the optimal response out of the servo.


Pulses that are far too slow may cause your robot to seem awkward and jerky. Rotation position of the servo depends on the pulse with (time the pulse is high or near +5V). This is called Pulse Coded Modulation (PCM) or Servo Pulse Width Modulation (Servo PWM). The following figure shows how the closed-loop servos work.

Depending on the manufacturer, the range of the pulse width to drive the servo varies. In general, typical values are in the ranges: 0.9 ms to 1.5 ms to move to the left, 1.5 ms in the center, 1.5 ms to 2.1 ms to move to the right.

open-loop servos :


Modified servos are modified so that they can turn freely forever. There is no way of determining how far they have traveled, or making them only to turn to a certain angle since the feedback mechanism has been removed.
One main advantage of this type of servos is that it can be used to drive a robot wheel continuously while controlling both speed and direction. Open-loop servos are similar to closed-loop in that they turn one direction or the other depending on the pulse that are given.
Open-loop servos expect a periodic control pulse of 20 ms just as close-loop servos. The main difference is that the feedback mechanism stopping the servo from “moving to far” has been removed
The speed of the servo depends on how much more or how much less the pulse with is compared to a “STOP” pulse. Here the STOP pulse stops the servo from moving rather that moving to the CENTER position. By varying the pulse widths, you can vary the speed. The following figure shows how the open-loop servos work.


If a servo is driving the wheel of a mobile robot, you can measure the rotational speed or get the manufacturer rated rotational speed. Using this rotational speed and the diameter of the wheel, you can calculate the distance the robot travels
Distance S = π ω D
where
S is the distance traveled in one minute (cm)
D is diameter of the wheel (cm)
ω is the angular velocity of the servo measured in Revolutions Per Minute (RPM)

All the best ..!

PayPal accidentally credits man USD 92 quadrillion

New York .. Online Cash Transfer Pepol the company's account by mistake a person 92 Quadrillion put the 9 lakh 22 thousand 337 trillion. The person of the Company for the time being accidentally became the wealthiest man in the world.

Delaware's Chris Renolds (56) This pleasant setback last week when the monthly statement they came Pepol by email. Accordingly, their account will Kwadriyiln 92. In terms of the amount so Chris richest man Carlos Slim became the thousands of times. Mexico's Carlos property is only 73 billion dollars.

Philadelphia Daily News Renolds is quoted as saying, "At first, I thought I would trillion trillions. It was too big a surprise. " Renolds said he used Pepol shopping online for ten years and do not spend more than $ 100 per month.

Renolds recovered from the initial surprise, he found that Pepol viewed by going to your account on the site and only zero dollars in his account.

Samsung Galaxy Core up for pre-booking at Rs 15,350 INR ships on 1 July

Samsung Galaxy Core up for pre-booking at Rs 15,350 INR ships on 1 July

Core Samsung Galaxy smartphone began appearing on the Istor. Its price is Rs 15 350. The Pre - booking has already begun. Shipping will start from July 1.
The Gigahrtj 1.2 smartphone dual - core processor, 8 GB storage, 1 GB RAM and 4.3-inch TFT LCD display with 480x800 pixels.
A 5 megapixel main camera and a front VGA camera. This is a 1800mAh battery. It runs on ऐndroid 4.1 Jellybean.
Connectivity options 2G, 3G, Wi - Fi and Bluetooth 3.0 are included. The single will also get a SIM with dual SIM.