ALL JNTU EXAMS ARE POSTPONED

All the Affilated colleges of JNTU-HYD University will remain closed from 4th To 18Th Dec.All the exams scheduled from 4th Dec are postponed.New Time Tables will be announced later...........

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30 dec exam postponed

All the university semester end examinations (B.Tech/MBA/MCA) scheduled on 30-11-2009 are postponed(officially De cleared BY JNTU-HYD) & The Exams for B.Tech./B.Pharm 4-1 sem (R05, RR & NR) scheduled on 12th Dec will be conducted as usual ( same Timings )

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Bharti slashes mobile roaming charges, shares fall

A rickshaw driver talks on his mobile phone as he rides past a billboard outside...

Bharti Airtel launched yet another new billing plan on Friday, slashing mobile roaming rates by nearly 60 percent and signalling a tariff war in the world's fastest-growing wireless market was far from over.

The announcement accelerated losses in the shares of Bharti, the country's top mobile operator. The stock fell as much as 3.3 percent but trimmed losses to 2.7 percent at 284.90 rupees by 0825 GMT in a Mumbai market that was up 0.3 percent.

The price war, aimed at grabbing new users ahead of fresh entrants waiting in the wings, has raised concerns about telecom firms' profitability. Four new firms, including ventures funded by Telenor and Etisalat, are set to start services this year adding to the existing 11 operators.

Bharti's market value has slumped more than a fifth this year to about $24 billion and its stock is the second worst performer in the main index that has risen about 72 percent. Rival Reliance Communications has fallen about a quarter in 2009.

Bharti, whose about 115 million users account for more than 23 percent of India's total mobile subscribers, in September cut call charges within its own network to 50 paise (U.S. 1 cent) a minute and in October launched a low-profit per-second billing plan, reacting to competition.

Tata Teleservices, the No. 6 operator, was the first to launch per-second billing, deviating from the industry norm of per-minute billing. The offer was a roaring success and the firm has topped the new signings for three months in a row.

Bharti's latest offer will allow users to recieve calls at 60 paise a minute while roaming, and they can make calls at 60 paise a minute within the Airtel network and at 80 paise a minute for calls to rival networks.

Analysts say Bharti still charges about 8-10 percent higher than Reliance's call prices.

Bharti has said it would be competitive in pricing but had no intention to match the lowest price in the market.

Britney Spears' Twitter account hacked

Pop diva Britney Spears has become a victim of Internet hackers.

The Toxic singer's Twitter and MySpace accounts were hacked and the messages posted on her page claimed she worshipped the devil.

However, several of the messages were deleted after Spears' management regained control of the account, reports China Daily.

The 27-year-old singer's Twitter feed has more than 3.7 million followers and is updated by herself and her "team" of handlers.

A message apologized for "any offense the hacker's messages caused."

Hydraulic Turbines: Definition and Basics

Hydraulic Turbines transfer the energy from a flowing fluid to a rotating shaft. Turbine itself means a thing which rotates or spins. To know more about what are Hydraulic Turbines, what is the working principle of Hydraulic Turbines and how are they classified, read on through this article series.

Leonardo da Vinci once said “The power of water has changed more in this world than emperors or kings”. It was very rightly stated by him as in present time Hydropower, the power generated from water, has a major contribution to the world’s total power production. This all was made possible by the development of Hydraulic Turbines which can transfer the energy from flowing water to the shafts of dynamos producing electrical power.

Hydraulic Turbines

Hydraulic Turbines have a row of blades fitted to the rotating shaft or a rotating plate. Flowing liquid, mostly water, when pass through the Hydraulic Turbine it strikes the blades of the turbine and makes the shaft rotate. While flowing through the Hydraulic Turbine the velocity and pressure of the liquid reduce, these result in the development of torque and rotation of the turbine shaft. There are different forms of Hydraulic Turbines in use depending on the operational requirements. For every specific use a particular type of Hydraulic Turbine provides the optimum output.

Classification of Hydraulic Turbines: Based on flow path

Water can pass through the Hydraulic Turbines in different flow paths. Based on the flow path of the liquid Hydraulic Turbines can be categorized into three types.

1. Axial Flow Hydraulic Turbines: This category of Hydraulic Turbines has the flow path of the liquid mainly parallel to the axis of rotation. Kaplan Turbines has liquid flow mainly in axial direction.
2. Radial Flow Hydraulic Turbines: Such Hydraulic Turbines has the liquid flowing mainly in a plane perpendicular to the axis of rotation.
3. Mixed Flow Hydraulic Turbines: For most of the Hydraulic Turbines used there is a significant component of both axial and radial flows. Such types of Hydraulic Turbines are called as Mixed Flow Turbines. Francis Turbine is an example of mixed flow type, in Francis Turbine water enters in radial direction and exits in axial direction.

None of the Hydraulic Turbines are purely axial flow or purely radial flow. There is always a component of radial flow in axial flow turbines and of axial flow in radial flow turbines.

Classification of Hydraulic Turbines: Based on pressure change

One more important criterion for classification of Hydraulic Turbines is whether the pressure of liquid changes or not while it flows through the rotor of the Hydraulic Turbines. Based on the pressure change Hydraulic Turbines can be classified as of two types.

1. Impulse Turbine: The pressure of liquid does not change while flowing through the rotor of the machine. In Impulse Turbines pressure change occur only in the nozzles of the machine. One such example of impulse turbine is Pelton Wheel.
2. Reaction Turbine: The pressure of liquid changes while it flows through the rotor of the machine. The change in fluid velocity and reduction in its pressure causes a reaction on the turbine blades; this is where from the name Reaction Turbine may have been derived. Francis and Kaplan Turbines fall in the category of Reaction Turbines.