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“INS ARIHANT” INDIA’s First Nuclear Submarine

August 3, 2009 · 4 Comments

India launched its first nuclear-powered submarine in a ceremony in southern port city of Vishakhapatnam 0n 26 July 2009, becoming one of just six nations in the world to have successfully built one. The 367-foot long INS Arihant, which means “Destroyer of the Enemies” in Hindi according to the official news release. The name Arihant has its origins in the Jain religion, and unofficial news reports stating “Destroyer of Enemies” omitting the definite article. India became the sixth country in the world to have built one. Besides the US, which has 74 nuclear submarines, Russia (45), UK (13), France (10) and China (10) also possess nuclear-powered submarines – the US has nearly as many nuclear submarines as all other countries combined.

India is a nation that struggled to enter the select group of countries that build nuclear powered submarines. Its program ATV, or Advanced Technology Vessel, was initiated in 1974. But after three decades it had not presented results that could modify the current picture of the navies with nuclear propulsion.

The INS Arihant, India’s first nuclear submarine that was till now known by the code name S 2, was launched at a simple ceremony in the port town of Visakhapatnam [Vizac] with the traditional breaking of a coconut on its hull by Prime Minister Manmohan Singh’s wife, Gursharan Kaur. It was expected to be ready for induction into the Navy by 2011 after a series of exhaustive trials.

The launch ceremony was attended by the prime Minister. Dr. Manmohan Singh, accompanied by Smt. Gursharan Kaur, Raksha Mantri Shri.AK Antony, Chief minister of Andhra Pradesh Dr. YS Rajasekhar Reddy, Raksha Rajya Mantri Shri MM Pallam Raju, Minister of State for Human Resource Development, Smt. D Purandareswari, Chief of the Naval Staff Admiral Sureesh Mehta and high ranking officials from the Navy, Department of Atomic Energy, and Defence Research and Development Organisation.

FREE SEMINARS AND TECHNICAL PPT PRESENTATIONS

On this occasion, the Prime Minister congratulated the Director General of the ATV (Advanced Technology vehicle) Program Vice Admiral DSP Verma (Retd) and all personnel associated with it for achieving this historic milestone in the country’s defence preparedness. He noted that they had overcome several hurdles and barriers to enable the country to acquire self reliance in the most advanced areas of defence technology. The Prime Minister made a special mention of the cooperation extended by Russia. The Prime Minister stated that the Government is fully committed to ensuring the Defence of our national interests and the protection of our territorial integrity. The Government would render all support to the constant modernization of our defence forces and to ensuring that they remain at the cutting edge of technology.

The project director, Vice Admiral (retd) D S P Verma, said that the Arihant is a 6,000-tonne submarine with a length of 110 meters and a breadth of 11 meters. The length is about 10 percent longer than previously published estimates, while the 11 meter beam is much less than the 15 meters of previous un-offcial estimates. Experts say the vessel will be able to carry 12 K 15 submarine launched ballistic missiles that have a range of over 700 km. The Indian nuclear powered attack submarine design was said in some reports to have a 4,000-ton displacement and a single-shaft nuclear power plant of Indian origin. By other accounts it would be 9,400 tons displacement when submerged and 124 meters long.

The MoD/PMO decided not to release any photographs of the submarine, and no filming or photography by the media was permitted inside the Matsya Dock. One report stated that the submarine was visibly based on the Russian Borei-class SSBN, and claimed that the official invitation had a silhouette of the submarine indicating that it’s almost definitely based on the Borei. But the 935 Borei has a length of 170 meters (580 feet), a beam of 13 meters (42 feet), and a displacement of 11,750-12,250 tons Surfaced and 17,000 tons Submerged.

India has been working actively since 1985 to develop an indigenously constructed nuclear-powered submarine, one that was possibly based on elements of the Soviet Charlie II-class design, detailed drawings of which are said to have been obtained from the Soviet Union in 1989. This project illustrates India’s industrial capabilities and weaknesses. The secretive Advanced Technology Vessel (ATV) project to provide nuclear propulsion for Indian submarines has been one of the more ill-managed projects of India.With the participation of involved Russian scientists and technician in the diverse phases of the program, came the possibility of that the first Indian submarine with nuclear propulsion can be operational in 2009, having been launched in 2006-2007.

Although India has the capability of building the hull and developing or acquiring the necessary sensors, its industry had been stymied by several system integration and fabrication problems in trying to downsize a 190 MW pressurized water reactor (PWR) to fit into the space available within the submarine’s hull. The Proto-type Testing Centre (PTC) at the Indira Gandhi Centre For Atomic Research. Kalpakkam, was used to test the submarine’s turbines and propellers. A similar facility is operational at Vishakapatnam to test the main turbines and gear box.

In 1998, L&T began fabricating the hull of ATV but the struggle with the reactor continued. After BARC designs failed, India bought reactor designs from Russia. By 2004 the reactor had been built, tested on land at the IGCAR and had gone critical. Its modest size, around 6,000 tons (the Ohio class SSBN in the movie Crimson Tide weighs over 14,000 tons), led experts to call it a “baby boomer”.

India had ample experience building Pressurised Heavy Water Reactors (PHWRs) using natural un-enriched uranium as fuel, and heavy water as moderator and coolant. But this was the first time that India has built a PWR that used enriched uranium as fuel, and light water as both coolant and moderator. The electrical power reactors that India would be importing (potentially from Russia, France, and the US) would also be PWRs with enriched uranium as fuel, and light water as both coolant and moderator. Naval nuclear reactors typically use uranium that is enriched to much higher levels than is the case with shore-based power reactors.

While the present project reportedly ends at three units, defence officials have not ruled out building larger submarines on the basis of national strategic imperatives. These have changed since the conception of the project. By the time the first unit was launched in July 2009, the construction of the hull for the next one was reportedly already underway at the Larson and Toubro (L&T) facility at Hazira where the first hull was built. The cost of the three submarines was reported at over Rs3,000 crore, over US$600,000,000 [the Indian numbering system is denominated in Crore 1,00,00,000 and Lakhs 1,00,000, so Rs3,000 crore is Rs30,000,000,000, or US$623,104,807.77 the day INS Arihant was launched]. Another report said that the first submarine alone had cost Rs. 14,000 Crore [$US2.9 billion]. In April 2006, the larger American Virginia-class subs were priced at $2.4 billion apiece, at which time the goal was to cut the program’s cost to about $2 billion per sub. The $2 billion figure is a baseline expressed in fiscal 2005 dollars. As of late 2008 the Procurement Cost for the first three units of the British Astute class SSN was forecast at £3,806 M (outturn prices) [US$6,275 B at 2009 conversion rates], for a unit cost of about US$2.1 billion.

The three submarines would be based at a facility being developed at Rambilli close to Vishakpatnam, where hundreds of acres of land had already been acquired. The Indian Navy hoped to commission the base by 2011 in time for INS Arihant’s commissioning, and two of these submarines would be at sea at any given time while the third would be in maintenance at the base. Other reports claim that India plans to build a fleet of five nuclear-powered submarines. On report in 2009 stated that the government had given clearance for the construction of much bigger SSBNs, nuclear-powered submarines capable of launching ballistic missiles, each of them costing about $2 billion (approximately Rs 10,000 crore each). This would take off once the three Arihant class submarines were ready.

By 2004 it was reported that the first ATV would be launched by 2007. At that time it was reported that it would be an SSGN and displacing some 6,500 tons, with a design derivative of Russia’s Project 885 Severodvinsk-class (Yasen) SSN. The ATV multirole platform would be employed for carrying out long-distance interdiction and surveillance of both submerged targets as well as principal surface combatants. It would also facilitate Special Forces operations by covertly landing such forces ashore. The ATV pressure hull will be fabricated with the HY-80 steel obtained from Russia.

This would have the possibility of multiple performance: it could use missiles of cruise of average reach (1,000 km), ballistic missiles of short reach (300 km), torpedoes and mines, besides participating of operations special.

The ATV is said to be a modified Akula-I class submarine. The Russian Akula-2 and Yasen are also modified Akula-1. By this line of reasoning the ATV would be in league of Yasen, so the ATV would be 6500 tons light, 8500 tons armed and surfaced and 10000 tons submerged. It would be the biggest and heaviest combat naval vessel built in India to date.

The 100-member crew, which will man the submarine, was trained at an indigenously-developed simulator in the School for Advanced Underwater Warfare (SAUW) at the naval base in Vizag. Hands-on training will be done on the INS Chakra, a 12,000-tonne Akula-II class nuclear-powered attack submarine being taken on a 10-year lease from Russia. SBC in Vizag is to become the assembly line for three ATVs, costing a little over Rs 3,000 crore each or the cost of a 37,000 ton indigenous aircraft carrier built at the Cochin Shipyard. Larsen and Toubro (L&T) has begun building the hull of the second ATV at its facility in Hazira, to be inducted into the navy by 2012.

As of 2007 the first of the five long-delayed ATVs was scheduled to be fully-ready by 2010 or so. In August 2008 it was reported that on January 26, 2009, the sluice gates of an enclosed dry-dock in Visakhapatnam were to be opened and the world was to take its first look at India’s first nuclear-powered submarine, the Advanced Technology Vessel (ATV), as it entered the waters.

In February 2009 defence minister A K Antony confirmed that India’s nuclear-powered submarine is in the final stages. “The Advanced Technology Vessel (ATV) project is in the final stage. We had some problems with the raw material in the initial phase. But now the project is in its final stage,” he said at the ongoing Aero-India show. This was a rare admission by the defence minister – not only on the existence of the secretive project to build an indigenous nuclear submarine, but also on its developmental status. The submarine, modelled on the Russian Charlie class submarine, is slated for a sea trial in 2009. Officials in the navy and atomic energy department are hopeful of meeting the deadline this time. In the long run, the government plans to buy three nuclear submarines to provide the navy with capability to stay underwater for a very long time. Though defence and nuclear sccientists have been working on this project since 1985, they had initial setbacks with the material and miniaturisation of the nuclear reactor whih will be fitted into the submarine’s hull.

Categories: NEWS & EVENTS · TECH-TALK
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Save Energy Go green

February 13, 2009 · Leave a Comment


Not with envy, but kindness to the environment, and alertness to your electricity bills
You leave your PC on all day. But you care for the environment, so you switch off the monitor. Good move, but did you know you are still wasting about 45 Watts with the CPU running?
That’s what Tufts University’s Climate Initiative says. And it also says that if you leave your PC on for the entire day, 850-1500 pounds of carbon dioxide is released into the atmosphere a year. And this means that you need 60-300 trees to absorb that much CO2 in a year.
That does get you thinking doesn’t it! Now, all that noise about climate change because of our insensitivity to the environment starts to make sense. We cut down trees, we waste electricity, we replace cellphones and gadgets with the latest ones, without bothering about what really happens to the old ones. While there could be debates on how much all this really impacts our environment, most of us know intuitively that what we are doing mindlessly is really not right, and is likely to have negative repercussions.
That is why the world over, the word Green is becoming red hot. Green computing is in. This means that you start to use computing resources efficiently. It’s not just about being good to Mother Nature, but also being able to save a lot of money being spent on electricity. For companies that have thousands and thousands of computers running, datacenters keeping their businesses up and running, all this can add to a huge fortune. In fact, going green is now gaining so much momentum that those companies which do not have green computing initiatives are seen as enemies of the environment.
So how does it matter to you? You might have one PC and a laptop at home, in addition to the multiple electronic devices you run. And you might even be considering another PC for the little one. Think if you really need all those PCs. Buy only if you have to. While buying, remember that laptops consume less power, so it could be wiser to go the portable way. Or if you need to look at a PC, opt for monitors that consume less power. LCD monitors need much less power than CRT ones. Look for Energy Star ratings and save energy.
Explore the power saving options of your PC and customize them to suit the way you work. If you often go away from your PC for a long time, you can set the monitor and hard disk to be switched off after a few minutes of no-activity.
To dispose old PCs and gadgets, get in touch with NGOs working in this area and figure out the best way to do so. Or if you own a branded PC or gadget, get in touch with the company and ask how this e-waste can be managed. Most computer vendors and cellphone makers have Green initiatives on, so you might get some help.
These are still early days for green initiatives for companies in India. But if you and I make a start, the rest will fall in place.

Categories: NEWS & EVENTS · TECH-TALK · how to live · life
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LabVIEW the new emerging tool

November 16, 2008 · Leave a Comment


LabVIEW is a powerfull tool developed by NATIONAL INSTRUMENS having many new features….

Increase Throughput with Parallel Test test engineers use LabVIEW, multicore processors, and new bus technologies to create high-performance test systems capable of parallel processing, parallel measurements, and even parallel test on the production floor. Connect to Any Instrument, Any Sensor, Any Bus Built-in I/O and communication libraries in LabVIEW provide native connectivity to any instrument, sensor, bus, or software interface to simplify integration of these components into your test applications.

Boeing Uses LabVIEW to Develop a Low-Cost Test System LabVIEW software and NI hardware helped a single Boeing developer create a high-channel-count, synchronized test system in only six months to measure the effectiveness of new commercial jetliner designs in reducing noise during flight.

Acquire Measurements from Any Sensor, Any Bus LabVIEW may be used to create a fully functional measurement application with analysis and a custom user interface using a variety of PCI- and USB-based data acquisition hardware. Measure in Minutes with LabVIEW and the DAQ Assistant LabVIEW uses the interactive DAQ Assistant and high-level functions to combine the flexibility and scalability of traditional programming languages and the ease of use of configuration-based data acquisition tools.
Acquire, Analyze, and Present Data Quickly with Express VIs to develop a powerful DAQ application that includes advanced analysis and a custom user interface. See how tasks that would take several lines of code in traditional programming languages are interactively configured with Express VIs in LabVIEW.

Use LabVIEW to Program the Next-Generation PLC Industrial engineers pushing the boundaries of controller technology can use LabVIEW graphical programming and programmable automation controllers (PACs) to combine PC functionality with programmable logic controller (PLC) reliability. Add Advanced Analysis to Your PLC Add advanced analysis, signal processing, decision making, and debugging diagnostics to an existing PLC-based industrial application with LabVIEW and OPC connectivity.

Simplify Embedded Development with Graphical System Design Discover how LabVIEW graphical system design software provides domain experts with high-level tools, such as statecharts, to design and implement their systems on off-the-shelf hardware. Get to Market Faster with LabVIEW and COTS Hardware LabVIEW graphical programming and commercial off-the-shelf (COTS) hardware help design teams get products to market faster by accelerating every stage of development – from the earliest stages of design and simulation to prototyping the system with real-world signals and deploying to a chosen processor target.
Prototype and Deploy a Custom Controller with LabVIEWDrivven used LabVIEW and COTS prototyping hardware to quickly develop custom IP for an FPGA-based engine control unit (ECU) in a high-performance motorcycle engine.

Control Industrial Machinery Remotely with LabVIEW Nexans uses LabVIEW and NI reconfigurable embedded hardware to control the hydraulic systems on a remotely operated underwater excavator that prepares the ocean floor for a pipeline to extract natural gas.

Combine Graphical and Textual Programming to Reduce Design Time Reduce embedded design time by using a LabVIEW graphical system design approach to combine the traditionally separate tasks of theoretical design and prototyping. Choose between graphical and textual programming throughout the process. Choose the Software Preferred by Students for Signal Processing Professor Mark Yoder, Ph.D., recently transitioned the signal processing course at Rose-Hulman from The MathWorks, Inc. MATLAB® software to LabVIEW software. Dr. Yoder’s research later showed that students prefer LabVIEW as a learning tool by a 3 to 1 margin. MATLAB® is a registered trademark of The MathWorks, Inc.


Students Use LabVIEW to Create Segway-Inspired Machine A senior design team at Rensselaer Polytechnic Institute used LabVIEW to develop a two-wheeled robotic locomotion platform inspired by the Segway Human Transporter. With LabVIEW software and NI hardware, the students could use one platform throughout the project.

source: www.ni.com

Categories: INSTRUMENTATION · LabVIEW · NI · SIMULATION · TOOL
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IMAGES OF CHANDRAYAN-1

October 22, 2008 · 8 Comments

Photo Gallary of Chandrayaan-1 and PSLV-C11

 

 

Click for full image Chandrayaan-1 spacecraft undergoing pre-launch tests
Click for full image Moon Impact Probe integration with Chandrayaan-1 spacecraft
Click for full image Moon Impact Probe
Click for full image Readying Chandrayaan-1 spacecraft for Thermovac test
Click for full image Fully integrated Chandrayaan-1 spacecraft (left) and loading it to Thermovac Chamber (right)

PSLV-C11 Liftoff

Click for full image PSLV-C11 Liftoff
Click for full image PSLV-C11 Liftoff
Click for full image PSLV-C11 Lift0ff

PSLV-C11 On Launch Pad

Click for full image PSLV-C11 on Launch Pad
Click for full image PSLV-C11 on its way to launchpad
Click for full image PSLV-C11 on its way to launchpad from Vehicle Assembly Building
Click for full image PSLV-C11 comming out from Vehicle Assembly Building
Click for full image PSLV-C11 at Vehicle Assembly Building

PSLV-C11 Third and Fourth Stages

Click for full image Close-up view of PSLV-C11 fourth stage
Click for full image PSLV-C11 Vehicle stacked up to fourth stage
Click for full image Hoisting of third and fourth stages of PSLV-C11

PSLV-C11 Second Stage

Click for full image Hoisting of PSLV-C11 Second Stage
Click for full image PSLV-C11 Second Stage with its VIKAS engine

PSLV-C11 First Stage

Click for full image Loading of PSLV-C11 First Stage Nozzle End Segment
Click for full image PSLV-C11 First Stage Nozzle End Segment on its way to Vehicle Assembly Building
Click for full image Positioning of PSLV-C11 First Stage Nozzle End Segment over launch pedestal

PSLV-C11 Strap-on

Click for full image Unloading a PSLV-C11 strap-on from transporter at Vehicle Assembly Building
Click for full image Fully Assembled First Stage surrounded by strap-ons of PSLV-C11

 

 

 

source: www.isro.org

Categories: IMAGES · NEWS & EVENTS · TECH-TALK
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WiFi

September 10, 2008 · 2 Comments

If you’ve been in an airport, coffee shop, library or hotel recently, chances are you’ve been right in the middle of a wireless network. Many people also use wireless networking, also called WiFi or 802.11 networking, to connect their computers at home, and some cities are trying to use the technology to provide free or low-cost Internet access to residents. In the near future, wireless networking may become so widespread that you can access the Internet just about anywhere at any time, without using wires.

One wireless router can allow multiple devices to connect to the Internet.

One wireless router can allow multiple devices to connect to the Internet.

WiFi has a lot of advantages. Wireless networks are easy to set up and inexpensive. They’re also unobtrusive — unless you’re on the lookout for a place to use your laptop, you may not even notice when you’re in a hotspot. In this article, we’ll look at the technology that allows information to travel over the air. We’ll also review what it takes to create a wireless network in your home.

First, let’s go over a few WiFi basics.

What Is WiFi?

A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication. Here’s what happens:
  1. A computer’s wireless adapter translates data into a radio signal and transmits it using an antenna.
  2. A wireless router receives the signal and decodes it. The router sends the information to the Internet using a physical, wired Ethernet connection.

The process also works in reverse, with the router receiving information from the Internet, translating it into a radio signal and sending it to the computer’s wireless adapter.

The radios used for WiFi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s. But WiFi radios have a few notable differences from other radios:

  • They transmit at frequencies of 2.4 GHz or 5 GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.
  • They use 802.11 networking standards, which come in several flavors:
    • 802.11a transmits at 5 GHz and can move up to 54 megabits of data per second. It also uses orthogonal frequency-division multiplexing (OFDM), a more efficient coding technique that splits that radio signal into several sub-signals before they reach a receiver. This greatly reduces interference.
    • 802.11b is the slowest and least expensive standard. For a while, its cost made it popular, but now it’s becoming less common as faster standards become less expensive. 802.11b transmits in the 2.4 GHz frequency band of the radio spectrum. It can handle up to 11 megabits of data per second, and it uses complementary code keying (CCK) modulation to improve speeds.
    • 802.11g transmits at 2.4 GHz like 802.11b, but it’s a lot faster — it can handle up to 54 megabits of data per second. 802.11g is faster because it uses the same OFDM coding as 802.11a.
    • 802.11n is the newest standard that is widely available. This standard significantly improves speed and range. For instance, although 802.11g theoretically moves 54 megabits of data per second, it only achieves real-world speeds of about 24 megabits of data per second because of network congestion. 802.11n, however, reportedly can achieve speeds as high as 140 megabits per second. The standard is currently in draft form — the Institute of Electrical and Electronics Engineers (IEEE) plans to formally ratify 802.11n by the end of 2009.
  • Other 802.11 standards focus on specific applications of wireless networks, like wide area networks (WANs) inside vehicles or technology that lets you move from one wireless network to another seamlessly.
  • WiFi radios can transmit on any of three frequency bands. Or, they can “frequency hop” rapidly between the different bands. Frequency hopping helps reduce interference and lets multiple devices use the same wireless connection simultaneously.

WiFi Hotspots

If you want to take advantage of public WiFi hotspots or start a wireless network in your home, the first thing you’ll need to do is make sure your computer has the right gear. Most new laptops and many new desktop computers come with built-in wireless transmitters. If your laptop doesn’t, you can buy a wireless adapter that plugs into the PC card slot or USB port. Desktop computers can use USB adapters, or you can buy an adapter that plugs into the PCI slot inside the computer’s case. Many of these adapters can use more than one 802.11 standard.

Once you’ve installed your wireless adapter and the drivers that allow it to operate, your computer should be able to automatically discover existing networks. This means that when you turn your computer on in a WiFi hotspot, the computer will inform you that the network exists and ask whether you want to connect to it. If you have an older computer, you may need to use a software program to detect and connect to a wireless network.

Being able to connect to the Internet in public hotspots is extremely convenient. Wireless home networks are convenient as well. They allow you to easily connect multiple computers and to move them from place to place without disconnecting and reconnecting wires. In the next section, we’ll look at how to create a wireless network in your home.

Building a Wireless Network

If you already have several computers networked in your home, you can create a wireless network with a wireless access point. If you have several computers that are not networked, or if you want to replace your Ethernet network, you’ll need a wireless router. This is a single unit that contains:

  1. A port to connect to your cable or DSL modem
  2. A router
  3. An Ethernet hub
  4. A firewall
  5. A wireless access point

A wireless router allows you to use wireless signals or Ethernet cables to connect your computers to one another, to a printer and to the Internet. Most routers provide coverage for about 100 feet (30.5 meters) in all directions, although walls and doors can block the signal. If your home is very large, you can buy inexpensive range extenders or repeaters to increase your router’s range.

A wireless router uses an antenna to send signals to wireless devices and a wire to send signals to the InternetA wireless router uses an antenna to send signals to wireless devices and a wire to send signals to the Internet.

As with wireless adapters, many routers can use more than one 802.11 standard. 802.11b routers are slightly less expensive, but because the standard is older, they’re slower than 802.11a, 802.11g and 802.11n routers. Most people select the 802.11g option for its speed and reliability.

Once you plug in your router, it should start working at its default settings. Most routers let you use a Web interface to change your settings. You can select:

  • The name of the network, known as its service set identifier (SSID) — The default setting is usually the manufacturer’s name.
  • The channel that the router uses — Most routers use channel 6 by default. If you live in an apartment and your neighbors are also using channel 6, you may experience interference. Switching to a different channel should eliminate the problem.
  • Your router’s security options — Many routers use a standard, publicly available sign-on, so it’s a good idea to set your own username and password.

Security is an important part of a home wireless network, as well as public WiFi hotspots. If you set your router to create an open hotspot, anyone who has a wireless card will be able to use your signal. Most people would rather keep strangers out of their network, though. Doing so requires you to take a few security precautions.

It’s also important to make sure your security precautions are current. The Wired Equivalency Privacy (WEP) security measure was once the standard for WAN security. The idea behind WEP was to create a wireless security platform that would make any wireless network as secure as a traditional wired network. But hackers discovered vulnerabilities in the WEP approach, and today it’s easy to find applications and programs that can compromise a WAN running WEP security.

To keep your network private, you can use one of the following methods:

  • WiFi Protected Access (WPA) is a step up from WEP and is now part of the 802.11i wireless network security protocol. It uses temporal key integrity protocol (TKIP) encryption. As with WEP, WPA security involves signing on with a password. Most public hotspots are either open or use WPA or 128-bit WEP technology, though some still use the vulnerable WEP approach.
  • Media Access Control (MAC) address filtering is a little different from WEP or WPA. It doesn’t use a password to authenticate users — it uses a computer’s physical hardware. Each computer has its own unique MAC address. MAC address filtering allows only machines with specific MAC addresses to access the network. You must specify which addresses are allowed when you set up your router. This method is very secure, but if you buy a new computer or if visitors to your home want to use your network, you’ll need to add the new machines’ MAC addresses to the list of approved addresses. The system isn’t foolproof. A clever hacker can spoof a MAC address — that is, copy a known MAC address to fool the network that the computer he or she is using belongs on the network.

    Sources

    • Borisov, Nikita, Ian Goldberg and David Wagner. “Security of the WEP algorithm.” University of California, Berkeley. (Aug. 7, 2008)
      http://www.isaac.cs.berkeley.edu/isaac/wep-faq.html
    • Geier, Jim. “802.11 WEP: Concepts and Vulnerability.” Wi-Fi Planet. June 20, 2002. (Aug. 6, 2008)
      http://www.wi-fiplanet.com/tutorials/article.php/1368661
    • IEEE. (Aug. 6, 2008)
      http://www.ieee.org
    • IEEE. “IEEE Standard for Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements.” (Aug. 6, 2008) http://standards.ieee.org/getieee802/download/802.11-2007.pdf

Categories: INSTRUMENTATION · TECH-TALK · TUTORIALS · Uncategorized
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BEFORE u get enroled for an ENGINEERING course

September 7, 2008 · 3 Comments

Details of Various Engineering Courses

Aeronautical Engineers
Job Description:
The work involves designing, constructing, development and testing of aircrafts, spacecrafts and their components as well as satellites and missiles. Aeronautical engineering is technologically one of the most challenging fields of engineering. 
Educational Qualification:
Graduate in Aeronautical Engineering; Associate Membership exam conducted by the Aeronautical Society of India; Those with a degree in electronics or physics can also find opportunities in this area.
Opening:
Job opportunities for an Aeronautical Engineer lies with various airlines and aircraft manufacturers like the Hindustan Aeronautics Ltd. (HAL). The main thrust of the area being in development, most Aeronautical Engineers take on work in Research and Development (R&D) areas in the Ministry of Defense and Civil Aviation and other defense or space research laboratories.
 
Agriculture Engineers
Job Description:
An Agriculture Engineer deals with the design and development of farm equipments and machineries, production, processing, transportation and storage of agricultural produce. He would also work on soil and water conservation. 
Educational Qualification:
Graduate in Agricultural Engineering
 
Opening:
Agriculture Engineers may be involved in the sales, marketing and servicing of farm equipment and agricultural implements, in designing and constructing farm buildings, in product planning and so on. They also get jobs as Assistant Engineers or Management Trainees in banks. Openings are also available in teaching, research and journalism. Besides these engineers are absorbed in large numbers by the agricultural department of the Central as well as the State Governments.
Automobile Engineers
Job Description:
As the name suggests is concerned with the design, development, repair and manufacture of automotive vehicles. The Automobile Engineer designs new models, keeping in mind the performance capacity, durability and customer preferences. With the growing concern about the vehicular pollution they also set stringent norms on such matters.
Educational Qualification:
Graduate in Automobile Engineering
Opening:
Employment opportunities lie with the vehicle manufacturers/assemblers in maintenance and service stations, private transport companies and insurance companies. Option for setting up own garage or maintenance workshops also exist.
 
Chemical Engineers
Job Description:
Chemical Engineers apply the principles of chemistry and engineering to solve problems in production of chemicals and chemical products.  They are concerned with the designing, construction, installation and operation of plants and equipments for the manufacture of chemical products.
Educational Qualification:
Graduate in Chemical Engineering 
Opening:
They have a very wide scope of employment both in the public sector as well as the private sector. They are needed and gainfully employed in the soap, oil, paint, plastics, synthetic fibers, explosives and petrochemical plants. They may also pursue management after B.Tech and take on marketing jobs.
Civil Engineers
Job Description:
Design and construction of buildings, roads, airports, harbours, tunnels, bridges, rail roads, dams, water and sewage systems and, even nuclear power plants. A Civil Engineer is responsible for planning and designing a project and then having it constructed to the required scale.  
Educational Qualification:
Graduate in Civil Engineering
Opening:
They are employed at all the major construction companies whether in public or in private, railways, consultancy firms, army and so on. Civil Engineer graduates can also pursue teaching and research or start their own consultancy firm.
Computer Engineers
Job Description:
They design computers and its control systems i.e. the hardware, and also develop computer software. They often work as part of a team that designs new computing devices or computer-related equipment, systems, or software. Computer hardware engineers usually design, develop, test, and supervise the manufacture of computer hardware—such as chips or device controllers. Software engineers, on the other hand, can be involved in the design and development of software systems for control and automation of manufacturing, business, and management processes.
Educational Qualification:
Graduate in Computer Science & Engineering
Opening:
With wide spread use of computers computer engineers can find employment in almost any area of industrial sector and in defense and research establishments. They can work with multinationals, in management consultancy firms and in areas where computer aided systems are used such as aeronautics and space science, petroleum industry and power plants.
Electrical Engineers
Job Description:
The role of Electrical Engineers comprises design and development of more efficient electrical machinery, power systems and control equipment for the generation, transmission and distribution of electrical energy and telecommunication. They specialize in different areas like power generation, transmission and distribution, electrical equipment manufacturing etc.
Educational Qualification:
Graduate in Electrical Engineering
Opening:
Electrical Engineers find jobs in power plants whether thermal, hydro or nuclear. They have job opportunities in industries like the railways, construction, civil aviation, and all types of manufacturing plants.

Electronics Engineers

Job Description:
This area may be considered as an offshoot of the Electrical Engineering field. It is different in the sense that it deals with lower power generation. These Engineers are concerned with design, fabrication, maintenance and supervision of electrical equipment used in the entertainment sector, media, hospitals, and computer industry and for communication and in defense. They work with microprocessors, fibre optics and in telecommunication, television and radio. Electronic Engineers may specialize in computers, industrial equipment and controls, aerospace equipment or bio medical equipment.
Educational Qualification:
Graduate in Electronics Engineering
Opening:
Electronic Engineers are employed in industries manufacturing electronic equipment, research and development and places where electronic devices are extensively used e.g. television and radio broadcasting, aerospace industry and automobile industry. They also have attractive openings in utility companies like MTNL. They also have the option to take on teaching and research.
Instrumentation Engineers
Job Description:
They are responsible for designing, development, construction and maintenance of instruments and instrumentation systems. The Instrumentation Engineer decides the type of instruments needed for ensuring better quality and efficiency of the end products, in any industrial undertaking.
Educational Qualification:
Graduate in Instrumentation Engineering
Opening:
The demand for Instrumentation Engineers comes from user industries such as steel, chemical, fertilizer, refineries power industry and so on. They also have a demand in R&D Units of government, defense and private sector. The instrument manufacturers and the growing industrial automation industry also employ them.
Marine Engineers
Job Description:
They deal in designing, development, fabrication and maintenance of marine engines, boilers, refrigerating, sanitary equipment, deck machinery and steam connections of marine ships. The job, also includes the supervision of engine crew involved in operating the machines and checking for smooth functioning of all sea, engines, electric motors, propulsion engines etc. 
Educational Qualification:
The Directorate of Marine Engineering (DMET) Calcutta now known as Marine Engineering Research Institute (MERI) offers 4-year course in Marine Engineering. Selection for the course is through the Joint Entrance Examination conducted by IIT.
Opening:
Marine Engineers find jobs as officers in the merchant navy. Port and harbour authorities and ship repair dockyard companies also employ them.
Mechanical Engineers
Job Description:
Mechanical Engineering is the largest part of the engineering industry. These engineers deal with the mechanism and functioning of all types of machinery. They are concerned with the design, operation and maintenance of machines, their components, machine tools, manufacturing systems and processes. They work on power-producing machines such as electricity-producing generators, internal combustion engines, steam and gas turbines, and jet and rocket engines. They also develop power-using machines such as refrigeration and air-conditioning equipment, robots used in manufacturing, machine tools, materials handling systems, and industrial production equipment. Mechanical engineers also design tools needed by other engineers for their work.
Educational Qualification:
Graduate in Mechanical Engineering
Opening:
Employment opportunities are open in practically every segment of the industry and especially in the area of machine tools, railway engineering, aerospace, automobile industries and power plants.

Material, Metallurgical And Ceramic Engineers 

Job Description:
Material Engineers manipulate the atomic and molecular structure of substances to make different products like computer chips, television screens and also composite materials required for specific purposes such as for fabricating the body of a space craft. Metallurgical and Ceramic engineers are also material engineers specializing in metals and ceramics respectively.
Most metallurgical engineers work in one of the three main branches of metallurgy—extractive or chemical, physical, and mechanical or process. Extractive metallurgists are concerned with removing metals from ores and refining and alloying them to obtain useful metal. Physical metallurgists study the nature, structure, and physical properties of metals and their alloys, and methods of processing them into final products. Mechanical metallurgists develop and improve metalworking processes such as casting, forging, rolling, and drawing.
Ceramic engineers develop new ceramic materials and methods for making ceramic materials into useful products. They work on products as diverse as glassware, automobile and aircraft engine components, fibre-optic communication lines, tile, and electric insulators.
Educational Qualification:
Graduate in Material/Metallurgical/Ceramic Engineering
Opening:
They are employed by research establishments, industries and plants extracting and processing metals like iron and steel, nickel, copper, zinc etc. in foundries and rolling mills and in large steel plants.
Mining Engineers
Job Description:
Mining engineers do prospecting of the natural reserves of minerals, petroleum and other natural substances. They design open pit and underground mines, supervise the construction of mine shafts and tunnels in underground operations, and devise methods for transporting minerals to processing plants. Mining engineers are responsible for the safe, economical, and environmentally sound operation of mines. 
Educational Qualification:
Graduate in Mining Engineering and a certificate from the Director General of Mines and Safety, Dhanbad
Opening:
Job opportunities are available at Indian Bureau of Mines (IBM), Geological Survey of India (GSI) and mining companies such as Coal India Ltd, IPCL etc. Teaching and research are also available as options.

Production And Industrial Engineers

Job Description:
They aim at maximizing output by effective planning and optimum use of men and machinery. Their work involves designing and installation of integrated systems for men and materials, equipment and processes for attaining maximum productivity with optimum use of resources. These engineers use ‘Operations Research’ and other such mathematical methods to analyze and solve production and other organizational problems. They are a link between the management and the operations.
Educational Qualification:
Graduate in Production & Industrial Engineering. National Productivity Council, New Delhi, also offers short duration courses in this area. 
Opening:

Private or public sector engineering and manufacturing industries. Financial Institutions and Management Consultants also recruit them.

Telecommunication Engineers

Job Description:
Design, development, installation and maintenance of communication systems e.g. telephones, telegraphs, radar, radio, radio navigational aids, television and satellite communication.  
Educational Qualification:
Graduate in Telecommunication Engineering  
Opening:
Ample job opportunities in Information and Broadcasting sectors, railways, police, Para–military, and defence related organizations. Private companies manufacturing radio equipment and electronic goods also require their services.

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