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What is Secondary Storage (External Storage Device)? Floppy diskettes, hard disk, taps and optical disks come under the category of external storage device or ancillary storage device. These devices are very sensitive to environmental conditions (humidity and temperature) as well as to external magnetic fields and need to be stored carefully. Types of external storage device are as follows: 1.       Floppy disk 2.       Hard disk 3.       Tape 4.       Optical disk 1.       Floppy disk: It is magnetic storage media, using flat circular platter. Floppy disks are primarily used on PCs . Information on a floppy disk is recorded in the magnetized states of particles of iron oxides evenly placed upon concentric circles known as Tracks. Tracks are further divided into sectors. The difference between the capacities of double density and the quad de...

T-18 with fares 40-50% higher than Shatabdi The new train has a number of feature to enhance passenger comfort which includes inter-connection fully-sealed gangways, automatic doors with retractable footsteps, onboard Wi-Fi and infotainment, GPS-based passenger information system, rotational seats which can be aligned in the direction of travel(available only in the Executive Class) roller blinds and diffused LED lighting and disabled-friendly toilets. T-18 , which runs on electric traction like Metro trains, will start replacing the Shatabdi   Express fleet from next year, the officials said. The train-18 built by the Integral Coach Factory (ICF) in Chennai, has undergone extensive trains under the supervision of Research designs and Standards Organisation ( RDSO) ,Lucknow. It has successfully complicated trials up to a speed of 180 km/h. The train is capable of touching a maximum speed of 200 km/h. The Executive class fare would be between Rs 2,800 and ...

Harmful effects of Tattoo 1.       Hepatitis: It is major health risk that you may be subjecting yourself to by getting a tattoo is Hepatitis. Hepatitis is caused by sharing needles that are not sterilized properly after being used on someone else. 2.       Skin Cancer: Tattoo   can also cause skin cancer if they affect your skin and body in extreme ways. A notable number of cases have come up where tattoos have led to melanoma or cancer in the skin cells. 3.       Infections: The tattoo needles harbor more germs than you can imagine. According to a study by the   Tulane University school of Medicine, 3% of all tattoo get infected and people may experience persistent itching or irritation on their tattoos. 4.       Complications in medical procedures: During medical procedures, metal-based tattoo inks may interfere with result of an MRI-Scan or an ...

                      WHAT IS  RADAR? The word radar is coined from the phrase “Radio detection and Ranging”. It is basically an echo-ranging system in which electromagnetic energy in the from of high-power short-duration pulse are sent out at distant objects or targets. The reflected signal or the echo is received at the   transmitting station and analysis   to obtain information on the location of the targets. Essentially, the radar system consists of a transmitter and receiver, both connected to a directional antenna through a switching arrangement, called a duplexer. A small portion of the pulse power generated by the transmitter excites the duplexer which disconnects the receiver from the antenna and connects the transmitter to the antenna. In most systems, the antenna scans   i,e.,   rotates to direct the radiated beam as desired. The scanning speed is small compared to the speed of ligh...

The Twin Paradox The relativistic effects give rise to a famous so-called      paradox      of     two persons, say A and B, who are twins, born at the same time. Suppose that A flies away in a space ship at a speed comparable to the speed of light, leaving B stationary on the ground.  B sees A moving fast, so that A’s clock appears to go slower from B’s point of view. If A comes back, he will find his twin brother B older than himself. The paradox arises from the contention that all motion is relative; so either twin could consider the other to be moving.  Thus each should find the other younger, which is a logical contradiction. This contention presupposes that the twins situations are symmetrical and interchangeable. But this is not true. For the twins to meet and make the comparison, A has to turn around to come back.  When the turns around, he feels the acceleration, while B feels nothing. Thus the situation ...

The most Beautiful Fort In Maharashtra, Vijay Durg   Vijaydurg, an impressing ancient fort is located near the mouth of the Vaghotan River, district-Sindhudurg of Maharashtra. One of the largest forts on the konkan coast, Vijaydurg is the best of forts to visit in Maharashtra. It is a protected monument under the Archaeological Survey of India. Vijaydurg fort is spread across an area of   68796.55 sqm and provides evidence of the martial supremacy of the Marathas under shivaji’s period. This fort is also known as the victory fort. It is belived that the fort was built by Bhojraja Shilahar between 1196 and 1206 ad over an area of 5 acres, which later was extended to 17 acres by Shivaji Maharaj . The Maratha King Shivaji Maharaj   took the fort from Adil Shahi dynasty in 1656 and renamed it as Vijaydurg. It is also one of two forts where Maratha King Shivaji Maharaj personally hoisted the saffron flag. The fort was initially named Gheria a...

                                                 PRIZE Prize – Field 1.       Oscar – Film 2.       Dada Sahib Phalke – Film 3.       Grammy – Music 4.       Pulitzer – Journalism and Literature 5.       Arjuna – sports 6.       Bowelay – Agriculture 7.       Kalinga – Science 8.       Dhanwantri – Medical Science 9.       Bhatnagar – Science 10.   Nobel Prize – Peace, Literature, economics, Physics, Chemistry, Medical Science, 11.   Abel – Mathematics 12.   Merlin – Magic 13.   Bharat Ratna – Art, Science, Public Service, Sports 14.   Vyas Samman – Hindi Literature...

                     Military Exercises Exercises name - Countries Involved   - type of exercise Sundarban   Moitry - Border Security Force(BSF) — Military Sampriti — India and Bangladesh   Army  –  Military Hand-in-Hand  –  India and China –  Military Surya Kiran  –  India and Nepal  –  Military               Nomadic Elephant  –  India and Mongolia  –  Military Khanjar  ---  India and Kyrgyzstan — Military Mitra Shakti – India and Sri Lanka – Military EKUVERIN  –  India and Maldives  –  Military LAMITYE  –  India and Seychelles  –  Military AL NAGAH  –  India and Oman  –  Military COBRA GOLD  –  India and   Thailand , A...