LEEVENSPARK

Born:  September 15, 1860 Died:  April 14, 1962 Achievements:  Architect of Krishnarajasagar Dam; devised steel doors to stop the wasteful flow of water in dams; honored with Bharat Ratna. Sir Mokshagundam Visvesvaraya was an eminent engineer and statesman and played a key role in building of modern India. Sir M. Visvesvaraya was born on September 15, 1860 in Muddenahalli village in the Kolar district of the erstwhile princely state of Mysore (present day Karnataka). His father Srinivasa Sastry was a Sanskrit scholar and Ayurvedic practitioner. His mother Venkachamma was a religious lady. He lost his father when he was only 15 years old. Visvesvaraya completed his early education in Chikkaballapur and then went to Bangalore for higher education. He cleared his B.A. Examination in 1881. He got some assistance from the Government of Mysore and joined the Science College in Poona to study Engineering. In 1883 he ranked first in the L.C.E. and the F.C.E. Examinations (equivalent to B.

Born:  November 30, 1858 Died:  November 23, 1937 Achievements:  He was the first to prove that plants too have feelings. He invented wireless telegraphy a year before Marconi patented his invention. Jagdish Chandra Bose was an eminent Indian scientist. He was the first to prove that plants and metals too have feelings. Jagdish Chandra Bose was born on November 30, 1858 in Mymensingh (now in Bangladesh). His father Bhagabanchandra Bose was a Deputy Magistrate. Jagadish Chandra Bose had his early education in village school in Bengal medium. In 1869, Jagadish Chandra Bose was sent to Calcutta to learn English and was educated at St.Xavier's School and College. He was a brilliant student. He passed the B.A. in physical sciences in 1879. In 1880, Jagdishchandra Bose went to England. He studied medicine at London University, England, for a year but gave it up because of his own ill health. Within a year he moved to Cambridge to take up a scholarship to s

Born:  October 30, 1909 Died:  January 24, 1966 Achievements:  Founded Tata Institute of Fundamental Research; was the first chairman of India's Atomic Energy Commission; was chairman of the first United Nations Conference on the Peaceful Uses of Atomic Energy, held in Geneva in 1955. Homi Bhabha, whose full name was Homi Jehnagir Bhabha, was a famous Indian atomic scientist. In Independent India, Homi Jehnagir Bhabha, with the support of Jawaharlal Nehru, laid the foundation of a scientific establishment and was responsible for the creation of two premier institutions, Tata Institute of Fundamental Research and Bhabha Atomic Research Centre. Homi Bhabha was the first chairman of India's Atomic Energy Commission. Homi Jehangir Bhabha was born on October 30, 1909, in Bombay in a rich Parsi family. After graduating from Elphinstone College and the Royal Institute of Science in Bombay, he went to Cambridge University. He received his doctorate in 1934. During this p

'Total Earth blackout' due to alignment of Universe- NASA moves to shed light on rumours!! Rumours are rife that the Sun itself will be totally blacked out by an 'alignment' of the Universe causing those who are easily led astray to hyperventilate about doomsday - using NASA's own data! The truth is far from that. Here is a mythbuster straight from NASA's Francis Reddy. Thick dust clouds block our night-time view of the Milky Way, creating what is sometimes called the Dark Rift. The fact that -- from the viewpoint of Earth -- the sun aligns with these clouds, or the galactic center, near the winter solstice is no cause for concern. Credit: A. Fujii One of the most bizarre theories about 2012 has built up with very little attention to facts. This idea holds that a cosmic alignment of the sun, Earth, the center of our galaxy -- or perhaps the galaxy's thick dust clouds -- on the winter solstice could for some unknown reason lead to destruction. Such alig

using this kind of the solar powered boat or the ships we can able to save the fuel and protect the atmosphere from pollution and global warming.   But there should be a large batteries that are capable enough to supply the power to the high torque motors and to drive the propellers at a required speed to reach the destination and on the other side we have to keep in mind that the time  to reach to the destination is also an important thing that satisfies the travelers.  So the scientist are improving the solar  panels in which a way that the panel can able to grasp the heat from the atmosphere and convert the heat into the direct current [DC].In order to make that scientists are using the nano technology to decrease the size of each crystal fine pill to compress the size of the panel and increase the life and efficiency of the solar panel  because the solar panel is kept in the open atmosphere and it should be capable enough to resist the different outer atmospheric conditi

Scientists have created the smallest petrol engine in the world ( less than a centimeter long not even half an inch ), small enough to power a watch or any small gadget. The mini-motor, which runs for two years on a single squirt of lighter fuel, is set to revolutionize world technology. It generates 700 times more energy than a conventional battery. It could be used to operate laptops and mobile phones for months doing away with the need for charging. Experts believe it could be phasing out batteries in such items within just six years. The engine, minute enough to be balanced on a fingertip, has been produced by engineers at the University of Birmingham.

This type of power screw is used for high  speed high efficiency applications, and is  becoming more common. It has become  popular because it is essential in CNC, as well as robots and aircraft actuators. The ball screw assembly is as shown below and includes a circular shaped groove cut in a helix on the shaft. The ball nut also includes an internal circular shaped groove which matches the shaft groove. The nut is retained in position on the shaft by balls moving within the groove. When the nut rotates relative to the shaft the balls move in one direction along the groove supporting any axial load. When the balls reach one end of the nut they are directed back to the other end via ball guides. The balls are therefore being continuously recirculated. The recirculated ball screw has the following advantages and disadvantages to the conventional threaded power screws:  Advantages: 1.High Efficiency - Over 90% 2.Predictable life expectancy 3.Precise and repeatable mo

Well,many of will be thinking that HOW AEROPLANES FLY??,Same question strike in my mind,so here is the answer for you guys. Drop a stone into the ocean and it will sink into the deep. Chuck a stone off the side of a mountain and it will plummet as well. Sure, steel ships can float and even very heavy airplanes can fly, but to achieve flight, you have to exploit the four basic aerodynamic fo rces: lift, weight, thrust and drag. You can think of them as four arms holding the plane in the air, each pushing from a different direction. First, let's examine thrust and drag. Thrust, whether caused by a propeller or a jet engine, is the aerodynamic force that pushes or pulls the airplane forward through space. The opposing aerodynamic force is drag, or the friction that resists the motion of an object moving through a fluid (or immobile in a moving fluid, as occurs when you fly a kite).If you stick your hand out of a car window while moving, you'll experience a very simple demon

A clutch is a mechanical device that provides for the transmission of power (and therefore usually motion) from one component (the driving member) to another (the driven member) when engaged, but can be disengaged. Clutches are used whenever the transmission of power or motion needs to be controlled either in amount or over time (e.g., electric screwdrivers limit how much torque is transm itted through use of a clutch; clutches control whether automobiles transmit engine power to the wheels). In the simplest application, clutches are employed in devices which have two rotating shafts (drive shaft or line shaft). In these devices, one shaft is typically attached to a motor or other power unit (the driving member) while the other shaft (the driven member) provides output power for work to be done. In a torque-controlled drill, for instance, one shaft is driven by a motor and the other drives a drill chuck. The clutch connects the two shafts so that they may be locked together and s

Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. It is revealed, for example, in the floating of some objects on the surface of water, even though they are denser than water, and in the ability of some insects (e.g. water striders) to run on the water surface. This property is caused by cohesion of similar molecules,  and is responsible for many of the behaviors of liquids. Surface tension has the dimension of force per unit length, or of energy per unit area. The two are equivalent—but when referring to energy per unit of area, people use the term surface energy—which is a more general term in the sense that it applies also to solids and not just liquids.The cohesive forces among liquid molecules are responsible for the phenomenon of surface tension. In the bulk of the liquid, each molecule is pulled equally in every direction by neighboring liquid molecules, resulting in a net force of zero.

Thanks to gyros, accelero meters  and sophisticated control  mechanisms, remaining upright on  a two-wheeled vehicle is no longer  quite the balancing act it might  once have been, even when at a  standstill. Visions of future mobility  like Honda's U3-X take such ideas  in whole new directions, quite  literally, by including multi- directional capabilities, and  concepts such as Supple go even  further still by ditching wheels  altogether in favor of balls. It's this  freedom of movement that inspired  a group of students from the  Charles W Davidson College Of  Engineering at San Jose State  University to begin work on the  ambitious Spherical Drive System  (SDS) electric motorcycle. The SDS concept vehicle is described as a self-balancing electric motorcycle that rides on spheres. Rather than using the kind of mechanical gyros that help keep the Gyrobike or the C-1 from Lit Motors in an upright position, the SDS creation uses data from MEMS gyroscopic sensor technol