Thursday, 16 May 2013

Kansai International Airport (KIX), (関西国際空港, Kansai Kokusai Kūkō

Kansai International Airport (関西国際空港 Kansai Kokusai Kūkō?) (IATA: KIXICAO: RJBB) is an international airport located on an artificial island in the middle of Osaka Bay, 38 km (24 mi) southwest of Ōsaka Station, located within three municipalities, including Izumisano (north), Sennan (south), and Tajiri (central), in Osaka Prefecture, Japan. The airport is off the Honshu shore. The airport serves as an international hub for All Nippon Airways, Japan Airlines, and Nippon Cargo Airlines, and also serves as a hub for Peach, the first international low-cost carrier in Japan.
It is colloquially known as Kankū (関空?) in Japanese.



  Kansai opened 4 September 1994 to relieve overcrowding at Osaka International Airport, which is closer to the city of Osaka and now handles only domestic flights. During the 2006 fiscal year, KIX had 116,475 aircraft movements, of which 73,860 were international (31 countries, 71 cities), and 42,615 were domestic (19 cities). The total number of passengers was 16,689,658 of which 11,229,444 were international, and 5,460,214 were domestic, sixth in Japan and second in Osaka area. However, in 2009, airport traffic has fallen by almost 20% in just two years to 13.4 million. In 2010 airport traffic had risen to over 14 million, with international passengers accounting for approximately 10.4 million and domestic passengers accounting for approximately 3.7 million. Freight volume was at 802,162 tonnes total, of which 757,414 t were international (18th in the world), and 44,748 t were domestic. The 4,000 m × 60 m (13,123 ft × 197 ft) second runway was opened on 2 August 2007. As of May 2012, Kansai Airport has become an Asian hub, with 499 weekly flights to Asia, 66 weekly flights to Europe and the Middle East, and 35 weekly flights to North America.

History

3rd floor boarding lobby, part of the longest airport concourse in the world.
  In the 1960s, when the Kansai region was rapidly losing trade to Tokyo, planners proposed a new airport near Kobe and Osaka. Osaka International Airport, located in the densely populated suburbs of Itami and Toyonaka, was surrounded by buildings; it could not be expanded, and many of its neighbors had filed complaints because of noise pollution problems.

   After the protests surrounding New Tokyo International Airport (now Narita International Airport), which was built with expropriated land in a rural part of Chiba Prefecture, planners decided to build the airport offshore. The new airport was part of a number of new developments to revitalize Osaka, which had lost economic and cultural ground to Tokyo for most of the century.
Initially, the airport was planned to be built near Kobe, but the city of Kobe refused the plan, so the airport was moved to a more southerly location on Osaka Bay. There it could be open 24 hours per day, unlike its predecessor in the city.

Construction


Satellite photo of Kansai Airport (lower-right island) in Osaka Bay. Kobe Airport is being built on the unfinished island near the middle of the photo. Central Osaka is in the upper-right corner, along with Osaka International.

Closeup of the artificial island

  A man-made island, 4 km (2.5 mi) long and 2.5 km (1.6 mi) wide, was proposed. Engineers needed to overcome the extremely high risks of earthquakes and typhoons (with storm surges of up to 3 m (10 ft)).
Construction started in 1987. The sea wall was finished in 1989 (made of rock and 48,000 tetrahedral concrete blocks). Three mountains were excavated for 21,000,000 m3 (27,000,000 cu yd) of landfill. 10,000 workers and 10 million work hours over three years, using eighty ships, were needed to complete the 30-metre (98 ft) layer of earth over the sea floor and inside the sea wall. In 1990, a three kilometer bridge was completed to connect the island to the mainland at Rinku Town, at a cost of $1 billion. Completion of the artificial island increased the area of Osaka Prefecture just enough to move it past Kagawa Prefecture in size (leaving Kagawa as the smallest by area in Japan).

   The bidding and construction of the airport was a source of international trade friction during the late 1980s and early 1990s. Prime Minister Yasuhiro Nakasone responded to American concerns, particularly from Senator Frank Murkowski, that bids would be rigged in Japanese companies' favor by providing special offices for prospective international contractors, which ultimately did little to ease the participation of foreign contractors in the bidding process. Later, foreign airlines complained that two-thirds of the departure hall counter space had been allocated to Japanese carriers, disproportionately to the actual carriage of passengers through the airport.
The island had been predicted to sink 5.7 m (19 ft) by the most optimistic estimate as the weight of the material used for construction compressed the seabed silts. However, by this time, the island had sunk 8.2 m (27 ft) - much more than predicted. The project became the most expensive civil works project in modern history after twenty years of planning, three years of construction and several billion dollars of investment. Much of what was learned went into the successful artificial islands in silt deposits for New Kitakyushu Airport, Kobe Airport, and Chūbu Centrair International Airport. The lessons of Kansai Airport were also applied in the construction of Hong Kong International Airport.

  In 1991, the terminal construction commenced. To compensate for the sinking of the island, adjustable columns were designed to support the terminal building. These are extended by inserting thick metal plates at their bases. Government officials proposed reducing the length of the terminal to cut costs, but architect Renzo Piano insisted on keeping the terminal at its full planned length. The airport opened in 1994.
On 17 January 1995, Japan was struck by the Kobe earthquake, whose epicenter was about 20 km (12 mi) away from KIX and killed 6,434 people on Japan's main island of Honshū. Due to its earthquake engineering, the airport emerged unscathed, mostly due to the use of sliding joints. Even the glass in the windows remained intact. In 1998, the airport survived a typhoon with wind speeds of up to 200 km/h (120 mph).
   On 19 April 2001, the airport was one of ten structures given the "Civil Engineering Monument of the Millennium" award by the American Society of Civil Engineers.

  As of 2008, the total cost of Kansai Airport is $20 billion. This includes land reclamation, two runways, terminal and facilities. Most additional costs were initially due to the island sinking, expected due to the soft soils of Osaka Bay. After construction the rate of sinking was considered so severe that the airport was widely criticized as a geotechnical engineering disaster. The sink rate has since fallen from 50 cm (20 in) during 1994 to 7 cm (2.8 in) in 2008.

Operation


A Finnair MD-11 and the terminal building on the background.

4th floor ticketing hall, illustrating the terminal's airfoil roof.

  Opened on 4 September 1994, the airport serves as a hub for several airlines such as All Nippon Airways,
Japan Airlines, and Nippon Cargo Airlines. It is the international gateway for Japan's Kansai region, which contains the major cities of Kyoto, Kobe, and Osaka. Other Kansai domestic flights fly from the older but more conveniently located Osaka International Airport in Itami, or from the newer Kobe Airport.
The airport had been deeply in debt, losing $560 million in interest every year. Airlines had been kept away by high landing fees (about $7,500 for a Boeing 747), the second most expensive in the world after Narita's. In the early years of the airport's operation, excessive terminal rent and utility bills for on-site concessions also drove up operating costs: some estimates before opening held that a cup of coffee would have to cost US$10. Osaka business owners pressed the government to take a greater burden of the construction cost to keep the airport attractive to passengers and airlines. Nowadays, after deep discounts, the number of flights are increasing.

  On 17 February 2005, Chubu Centrair International Airport opened in Nagoya, just east of Osaka. The opening of the airport was expected to increase competition between Japan's international airports. Despite this, passenger totals were up 11% in 2005 over 2004, and international passengers increased to 3.06 million in 2006, up 10% over 2005. Adding to the competition was the opening of Kobe Airport, less than 25 km (16 mi) away, in 2006 and the lengthening of the runway at Tokushima Airport in Shikoku in 2007.
The main rationale behind the expansions is to compete with Incheon International Airport and Hong Kong International Airport as a gateway to Asia, as Tokyo area airports are severely congested. As of 2008, with the regional trend in open skies agreements being signed, it is possible that all airports will see increases in traffic.

  Kansai has been marketed as an alternative to Narita Airport for international travelers from the Greater Tokyo Area. By flying to Kansai from Haneda Airport and connecting to international flights there, travelers can save the additional time required to get to Narita: up to one and a half hours for many residents of Kanagawa Prefecture and southern Tokyo. As of 2008, because of the time-limited nature of Haneda's new long-haul international slots, this will remain a viable option for daytime travelers.

Expansion


Second phase of Kansai International Airport under construction

    The airport was at its limit during peak times, owing especially to freight flights, so a portion of Phase II expansion—the second runway—was made a priority. Thus, in 2003, believing that the sinking problem was almost over, the airport operators started to construct a 4,000 m (13,000 ft) second runway and terminal.
The second runway opened on 2 August 2007, but without the originally planned terminal portion postponed. This lowered the project cost to JPY¥910 billion (approx. US$8 billion), saving ¥650 billion from the first estimate. The additional runway development, which was opened in time for the IAAF world athletics championships in Osaka, has expanded the airport size to 10.5 km2 (4.1 sq mi). The second runway is used for landings and when there are incidents prohibiting take off use of runway A.
A new terminal building opened in late 2012. There are additional plans for several new aprons, a third runway (06C/24C) with a length of 3,500 m (11,483 ft), a new cargo terminal and expanding the airport size to 13 km2 (5.0 sq mi). As of 2012, the Japanese government is postponing these plans for economic reasons.
    As of August 2007, the airport expected to handle 129,000 flights during the year 2007, an increase of 11% compared to 2006 figures of 116,475 flights. The new runway allowed the airport to start 24 hour operations in September 2007.

Relationship with Itami Airport

Since July 2008, Osaka Prefecture governor Toru Hashimoto has been a vocal critic of Itami Airport, arguing that the Chuo Shinkansen maglev line will make much of its domestic role irrelevant, and that its domestic functions should be transferred to Kansai Airport in conjunction with upgraded high-speed access to Kansai from central Osaka. In 2009, Hashimoto also publicly proposed moving the functions of Marine Corps Air Station Futenma to Kansai Airport as a possible solution for the political crisis surrounding the base.

  In May 2011, the Diet of Japan passed legislation to form a new Kansai International Airport Corporation using the state's existing equity stake in Kansai Airport and its property holdings at Itami Airport. The move was aimed at offsetting Kansai Airport's debt burden.
The merger of the Itami and Kansai airport authorities was completed in July 2012. Shortly following the merger, Kansai Airport announced a 5% reduction in landing fees effective October 2012, with additional reductions during overnight hours when the airport is underutilized, and further discounts planned for the future, including subsidies for new airlines and routes. As of October 2012 these moves were intended to bring Kansai's fees closer to the level of Narita International Airport, where landing fees were around 20% lower than Kansai's, and to improve competitiveness with other Asian hubs such as Incheon International Airport in Korea.

Terminals

Terminal 1

   The main KIX passenger Terminal l is a single four-story building designed by Renzo Piano Building Workshop (Renzo Piano and Noriaki Okabe) and has a gross floor space of 296,043 square metres (3,186,580 sq ft). As of 2008, it is the longest airport terminal in the world, at a total length of 1.7 km (1.1 mi) from end to end. It has a sophisticated people mover system called the Wing Shuttle, which moves passengers from one end of the pier to the other.
   The terminal's roof is shaped like an airfoil. This shape is used to promote air circulation through the building: giant air conditioning ducts blow air upwards at one side of the terminal, circulate the air across the curvature of the ceiling, and collect the air through intakes at the other side. Mobiles are suspended in the ticketing hall to take advantage of the flowing air.
   The ticketing hall overlooks the international departures concourse, and the two are separated by a glass partition. During Kansai's early days, visitors were known to throw objects over the partition to friends in the corridor below. The partition was eventually modified to halt this practice.

Terminal 2

  Terminal 2 is a low-cost carrier (LCC) terminal designed to attract more LCCs by providing lower landing fees than terminal 1. Similar to Singapore's Changi International Airport's low cost terminal, the terminal is basic and currently serves only Japan's Peach Air. As of 2010, this terminal is not directly accessible by train. A free shuttle bus transports passengers from Kansai International Airport's train station to Terminal 2.

Airlines and destinations

  The second floor of the Passenger Terminal Building is used for domestic departures and arrivals. All ticketing, boarding, and baggage claim are handled on the second floor. International arrivals go to immigration and baggage claim on the first floor. International departures are ticketed on the fourth floor and board from the third floor.
AirlinesDestinationsTerminal
Air BusanBusanT1(North)
Air ChinaBeijing-Capital, Chengdu, Dalian, Hangzhou, Shanghai-PudongT1(South)
Air FranceParis-Charles de GaulleT1(South)
Air IndiaDelhi, Hong KongT1(South)
Air MacauMacauT1(North)
Air New ZealandAuckland (ends 30 September 2013)T1(South)
AirAsia XKuala LumpurT1(North)
AircalinNouméaT1(South)
AlitaliaRome-FiumicinoT1(North)
All Nippon AirwaysBeijing-Capital, Dalian, Fukuoka, Hakodate, Hangzhou, Hong Kong, New Ishigaki, Okinawa, Qingdao, Sapporo-Chitose, Seoul-Incheon, Shanghai-Pudong, Tokyo-Haneda
Seasonal: Asahikawa, Memanbetsu, Wakkanai
T1(North)
Asiana AirlinesBusan, Seoul-Gimpo, Seoul-Incheon
Seasonal: Saipan
T1(North)
Cathay PacificHong Kong, Taipei-TaoyuanT1(North)
Cebu PacificManilaT1(North)
China AirlinesKaohsiung, New York-JFK, Taipei-TaoyuanT1(South)
China Eastern AirlinesBeijing-Capital, Kunming, Nanjing, Qingdao, Shanghai-Pudong, Wuhan, YantaiT1(South)
China Southern AirlinesChangchun, Dalian, Guangzhou, Harbin, ShenyangT1(South)
Delta Air LinesGuam, Honolulu, Seattle/TacomaT1(North)
Eastar JetSeoul-IncheonT1(South)
EgyptAirCairoT1(South)
EmiratesDubaiT1(South)
EVA AirTaipei-TaoyuanT1(North)
FinnairHelsinkiT1(North)
Garuda IndonesiaDenpasar/Bali, Jakarta-Soekarno Hatta (begins 28 October 2013)[29]T1(North)
Hawaiian AirlinesHonoluluT1(North)
Japan AirlinesBangkok-Suvarnabhumi, Fukuoka, Honolulu, Okinawa, Sapporo-Chitose, Seoul-Gimpo, Seoul-Incheon, Shanghai-Pudong, Taipei-Taoyuan, Tokyo-HanedaT1(South)
Japan Airlines
operated by J-Air
FukuokaT1(South)
Japan Airlines
operated by JAL Express
Seoul-Gimpo, Shanghai-Pudong, Tokyo-HanedaT1(South)
Japan Airlines
operated by Japan Transocean Air
New Ishigaki, Okinawa, Tokyo-HanedaT1(South)
Jeju AirJeju, Seoul-Gimpo, Seoul-IncheonT1(North)
Jetstar AirwaysCairns, Gold Coast, Singapore, SydneyT1(North)
Jetstar Asia AirwaysManila, Singapore, Taipei-TaoyuanT1(North)
Jetstar JapanFukuoka, Okinawa, Sapporo-Chitose, Tokyo-NaritaT1(North)
KLMAmsterdamT1(North)
Korean AirBusan, Cheongju, Guam, Jeju, Seoul-Gimpo, Seoul-IncheonT1(North)
LufthansaFrankfurtT1(North)
Malaysia AirlinesKota Kinabalu, Kuala LumpurT1(North)
Mandarin AirlinesScheduled Charter: KaohsiungT1(South)
MIAT Mongolian AirlinesSeasonal: Ulan BatorT1(North)
PeachBusan [begins 13 September 2013], Fukuoka, Hong Kong, New Ishigaki [begins 14 June 2013], Nagasaki, Okinawa, Sapporo-Chitose, Sendai, Seoul-Incheon, Taipei-TaoyuanT2
Philippine AirlinesManilaT1(South)
Qatar AirwaysDohaT1(North)
Shanghai AirlinesShanghai-PudongT1(North)
Shenzhen AirlinesFuzhou, Shenzhen, WuxiT1(South)
Singapore AirlinesSingaporeT1(South)
Skymark AirlinesSeasonal: AsahikawaT1(South)
StarFlyerTokyo-HanedaT1(South)
Thai Airways InternationalBangkok-SuvarnabhumiT1(North)
TransAsia AirwaysTaipei-TaoyuanT1(South)
Turkish AirlinesIstanbul-AtatürkT1(North)
United AirlinesGuam, San FranciscoT1(North)
Uzbekistan AirwaysTashkentT1(North)
Vietnam AirlinesHanoi, Ho Chi Minh CityT1(South)

Cargo

AirlinesDestinations
Air China CargoBeijing-Capital, Shanghai-Pudong
Air Hong KongHong Kong
Aircompany YakutiaShanghai-Pudong
ANA & JP ExpressSeoul-Incheon
ANA CargoBangkok-Suvarnabhumi, Dalian, Okinawa, Qingdao, Saga, Shanghai-Pudong, Tokyo-Haneda, Tokyo-Narita, Xiamen
Asiana CargoSeoul-Incheon
Cathay Pacific CargoHong Kong, Seoul-Incheon
China Airlines CargoTaipei-Taoyuan, Anchorage, Los Angeles
China Cargo AirlinesShanghai-Pudong, Xiamen
China Postal AirlinesShanghai-Pudong
China Southern CargoShanghai-Pudong
Cathay Pacific CargoHong Kong
Emirates SkyCargoDubai, Seoul-Incheon
EVA Air CargoTaipei-Taoyuan
FedEx ExpressAnchorage, Beijing-Capital, Guangzhou, Hong Kong, Memphis, Oakland, Singapore, Shanghai-Pudong, Taipei-Taoyuan, Tokyo-Narita
Hong Kong Airlines CargoHong Kong
Korean Air CargoSeoul-Incheon
Lufthansa CargoFrankfurt, Krasnoyarsk
Nippon Cargo AirlinesBangkok-Suvarnabhumi, Beijing-Capital, Guangzhou, Hong Kong, Seoul-Incheon, Shanghai-Pudong, Singapore, Tokyo-Narita
Polar Air CargoChicago-O'Hare, Shanghai-Pudong
Singapore Airlines CargoHong Kong, Los Angeles, Singapore
UPS AirlinesAnchorage, Shanghai-Pudong, Shenzhen

Ground transportation

Rail

Kansai International Airport is connected only by the Sky Gate Bridge R, a road / railroad bridge to Rinku Town and the mainland. The lower railroad level of the bridge is used by two railroad operators: West Japan Railway (JR West) and Nankai Electric Railway.
JR West operates Haruka, the limited express train services for Kansai Airport Station from Tennōji, Shin-Ōsaka, and Kyoto Station. JR West also offers "Kansai Airport Rapid" services for Kansai Airport Station from Ōsaka, Kyōbashi Station, and several stations on the way. Various connections, such as buses, subways, trams, and other railroads, are available at each station.
Nankai operates rapi:t, a limited express train service to Namba Station on the southern edge of downtown Osaka. Subway connections are available at Namba and Tengachaya Station.
Plans were drawn in the late 1980s for an underwater railway connecting Kansai Airport to downtown Kobe and Kobe Airport, although the extremely high cost of the project led to its indefinite postponement.

Bus

Kansai Airport Transportation Enterprise and other bus operators offer scheduled express bus services, called "Airport Limousines", for Kansai International Airport.

Parking

Two six story parking structures, called P1 and P2, are located above a railroad terminal station, while the other two level parking facilities, called P3 and P4, are situated next to "Aeroplaza", a hotel complex.
The airport is only accessible from the Sky Gate Bridge R, a part of Kansai Airport Expressway. The expressway immediately connects to Hanshin Expressways Route 5, "Wangan Route", and Hanwa Expressway.

Ferry service

In July 2007, high-speed ferry service (run by Kaijo Access Co.) began operating between Kobe Airport and KIX. The journey takes about thirty minutes.

Other facilities


Kensetsu-to, the headquarters of Peach Aviation and the Kansai International Airport Land Development Co.,Ltd.
  • Kansai Airport Agency Company Building (航空会社北ビル Kūkō Kaisha Kita Biru?) - Houses the Kansai Airport Agency Co., Ltd. (株式会社 関西エアポートエージェンシー Kabushiki Kaisha Kansai Eapōto Ējenshī?)
  • Kensetsu-to (建設棟 Kensetsu-tō?)
    • The head office of the Kansai International Airport Land Development Co.,Ltd. (KALD, 関西国際空港用地造成株式会社 Kansai Kokusai Kūkō Yōchi Zōsei Kabushiki Kaisha) is on the fourth floor.
    • The Peach Aviation head office is on the fifth floor.
  • Aeroplaza (エアロプラザ Earopuraza?) is located on the west side of Kansai Airport Station. It includes a hotel, restaurants, rental car counters, and other businesses
    • Hotel Nikko Kansai Airport (north portion of Kansai Airport)
    • Head office of Peach Aviation was previously located on the third floor (central portion of Kansai Airport)
  • Central power station (KEPCO energy center, 40 MW
  • Central heating and cooling plant
  • Sewage disposal plant (disposing 20,000 m3 (5,300,000 US gal) per day)
  • Incineration plant
  • JAL Cargo import and export facilities (in southern portion)
  • Japan Coast Guard Kansai airport Coast Guard air base
  • Japan Coast Guard Special Security Team Base
  • Osaka international post office (As of 2010 carrying about 19,000 tonnes per year of international postal matter)
  • Oil tanker berths (three berths) and Fuel Supply center
  • Airport access bridge ("The Sky Gate Bridge R")
  • As of 2011, the longest truss bridge in the world at 3,750 m (12,303 ft). The double-decker bridge consists of a lower deck devoted to rail, with the upper for road.

Ruler can do anything, so Born to rule the Galaxy

Friday, 1 February 2013

Mobile Phone Market- 2012

       Samsung, Nokia and Apple are the leading Mobile vendors by shipments in Q1 2012, according to a report by Research Firm IDC (International Data Corporation). The Worldwide mobile phone market declined 1.5% year over year in the Q1 2012 with worldwide shipments of 398.4 million units compared to 404.3 million units in the first quarter of 2011.

The worldwide smartphone market grew 42.5% year over year in Q1 2012 with 144.9 million smartphones shipped compared to 101.7 million units in Q1 2012.  Samsung overtook Apple and leads as the top smartphone vendor based on Shipments. They have also created a new record for most number of smartphones shipped in a single quarter with 42.2 million shipments and 29.1%. Apple is in second spot with 24.2% market share, followed by Nokia with 8.2% market share that is down by 50.8% compared to Q1 2011.

The table above indicates the Worldwide Mobile shipments based on the total unit shipments and market share in Q1 2012. Samsung tops the worldwide Mobile phone shipments with 23.5% market share in Q1 2012 that is 35.4% more than Q1 2011. Nokia is right behind with 82.7 shipments but has 23.8% less market share compared to Q1 2011. Apple is in the same 3rd spot. ZTE pushes LG to 5th spot.

Ruler can do anything, so Born to rule the Galaxy

Thursday, 10 January 2013

பொங்கல் திருநாள்!


Pongal marks the cultural celebration of Tamil People - Tamil Literature Ilakkiyam Papers உலகெங்கும் வாழும் தமிழர்களால் தை முதல் தேதியன்று கொண்டாடப்படுவது பொங்கல்.
மஞ்சள் தோரணங்கள் கட்டி, புது அரிசியில் பொங்கல் பொங்கி, கரும்பு உண்டு கொண்டாடப்படும் பொங்கல் விழா தைப்பொங்கல். தை 1 அன்று தமிழர்களால் சிறப்பாக கொண்டாடப்படும் ஒரு தனிப்பெரும் விழா. தமிழர் திருநாளாக தமிழ்நாடு, இலங்கை, மலேசியா, சிங்கப்பூர், ஐரோப்பிய நாடுகள், வட அமெரிக்கா, தென் ஆபிரிக்கா, மொரிசியசு என தமிழர் வாழும் அனைத்து நாடுகளிலும் கொண்டாடப்படுகிறது. இவ்விழா சமயங்கள் கடந்து அனேக தமிழர்களால் கொண்டாடப்படுகிறது.
பொங்கல் பண்டிகை நான்கு நாள் பண்டிகையாகும். மார்கழி கடைசி நாளன்று போகி கொண்டாடப்படுகிறது. அந்நாளில், பழையன கழித்து புதியன புகுத்தல் வழக்கம்.
 தை முதல் தேதியன்றே தமிழ்ப் புத்தாண்டு தொடங்கும் நாள் என்று மூத்த தமிழ்ச் சான்றோர்களின் வாக்கினைப் பின்பற்றி, தை முதல் தேதியை தமிழ்ப் புத்தாண்டாக கடைபிடிப்பது என்று தமிழக அரசு முடிவெடுத்து, அதற்கான சட்டமும் நிறைவேற்றப்பட்டுள்ளது.
 "பொங்கல் பண்டிகை" என்பது அறுவடைத் திருநாளாகக் கொண்டாடப்படுகிறது. ஆண்டு முழுவதும் நமக்கு உதவி புரியும் இயற்கைக்கும், விவசாயத்திற்குப் பயன்படும் கால்நடைகளுக்கும் நன்றி தெரிவிக்கும் நாளாக பொங்கலைக் கொண்டாடி மகிழ்கிறோம்.
 பொங்கல் என்பதற்கு "பொங்கி வழிதல்", "பொங்குதல்" என்பது பொருள். அதாவது புதிய பானையில், புத்தரிசியிட்டு, அரிசியில் இருந்து பால் பொங்கி வழிந்து பொங்கி வருவதால், தை பிறந்துள்ள புத்தாண்டு முழுவதும் நம் வாழ்வும், வளமும் அந்தப் பால் போன்று பொங்கி சிறக்கும். மகிழ்ச்சியும், திளைப்பும் ஒருசேரப் பல்கிப் பெருகுவதோடு, கழனியெல்லாம் பெருகி, அறுவடை மென்மேலும் அதிகரிக்கும் என்பதே இந்தப் பண்டிகையின் மேலோங்கிய தத்துவமும், தொன்றுதொட்டு வரும் நம்பிக்கையுமாகும்.
 பொங்கல் தினத்தன்று வயல்களில் விளைந்து, அறுவடைக்குத் தயாராக இருக்கும் நெற்கதிர்களில் சிறிதளவைக் கொண்டு வந்து வீட்டில் படைத்து வணங்குவதும் வாடிக்கையாக உள்ளது. தவிர, காடுகளில் விளையக்கூடிய அனைத்து வகை காய்கறிகளையும், பூமிக்குள் விளையும் கிழங்கு வகைகளையும் படைத்து வழிபடுகிறார்கள்.
 அறுவடை தொடங்கியதைக் குறிக்கும் வகையில், பயிர் விளைச்சலுக்கு உதவிய மழை, சூரியன், கால்நடைகள் மற்றும் விவசாயத் தொழிலாளர்களுக்கு நன்றி தெரிவித்து அவர்களுக்கு வேண்டியதைச் செய்யும் நாளே தைப் பொங்கல் திருநாள் எனலாம்.
 பொங்கல் தினத்தன்று வீட்டின் வாசலில் வண்ணக்கோலமிட்டு, அதன்மீது அடுப்புக் கட்டியை வைத்து அவற்றில் புதிய பானைகளில் வெண்பொங்கலும், சர்க்கரை பொங்கலும் தனித்தனியே செய்து, சூரியனுக்குப் படைத்து வழிபடுகிறோம்.
 இயற்கை வளத்தால், மும்மாரி மழை பொழிந்தால் மட்டுமே விவசாயம் பெருகும். காடு, கழனி நனையும். சூரிய வெளிச்சம் பட்டால்தான் பயிர் வளர்ச்சியடைந்து சாகுபடி சிறக்கும்.
 விளைந்த பயிரை அறுவடை செய்து தானியமாக்குவதற்கு தொழிலாளர்கள் உதவுகிறார்கள். பயிர் நடுவதற்கு ஏதுவாக உழவுக்கும், அறுவடைக்குப் பின் போரடிப்பதற்கும், விளைந்த தானியங்களை உரிய இடத்திற்குக் கொண்டு செல்வதற்கும் கால்நடைகள் பெரிதும் உதவுகின்றன. எனவே தான் விவசாயத் தொழிலாளர்களை வீடுகளுக்கு அழைத்து, சூரியனுக்குப் படைத்த பொங்கல் உள்ளிட்டவற்றை அளித்து வயிறாரச் சாப்பிடச் செய்வதுடன், அவர்களுக்குத் தேவையான வேட்டி, துண்டு, சேலை உள்ளிட்ட துணிகளையும் வழங்கி கவுரவிக்கிறோம்.
துணி-மணிகளுடன் சிறிய தொகை ஒன்றை பொங்கல்படியாக அளிக்கும் வழக்கமும் உள்ளது. தமிழகத்தின் தென் மாவட்டங்களில் விவசாயத் தொழிலாளர்களுக்கு மட்டுமின்றி வீட்டில் உள்ள குழந்தைகளுக்கும், வயதில் சிறியவர்களுக்கும் பெரியவர்கள் பொங்கல்படி அளிப்பார்கள்.
பொங்கல்படி வாங்குவதற்கென்றே உறவினர்கள் வீடுகளுக்குச் செல்லும் வழக்கமும் இருந்துள்ளது.
 பொங்கல்படி எனும் சிறிய தொகையை விடவும், பொங்கள் திருநாளில் உறவினர்கள் ஒருவரையொருவர் சந்தித்து, பேசிக் கொள்வதுடன் நீண்ட காலம் பார்க்காமல் இருப்பவர்களும் சந்திக்க ஏதுவாகிறது. இதனால் உறவினர்களுக்கு இடையேயான உறவும் வலுப்படும்.
 "உழவுக்கும், தொழிலுக்கும் வந்தனை செய்வோம்" என்பதற்கேற்ப ஆண்டு முழுவதும் விவசாயத்திற்கு பயன்படும் எருதுகள் உள்ளிட்ட கால்நடைகளுக்கு பொங்கல் வைத்து படைத்து, அவற்றுக்கும் அளித்து, நாமும் உண்டு மகிழ்கிறோம். இதற்காகவே மாட்டுப் பொங்கல் என தனியாக ஒரு நாளில் கொண்டாடி மகிழ்கிறோம்.
 மாடுகளின் கொம்புகளுக்கு வர்ணம் தீட்டி, சிங்காரித்து அவற்றின் கழுத்தில், உரிமையாளரின் வசதிக்கேற்ப கரும்பு முதல் தங்கக்காசு வரை கட்டி சாலைகளில் ஓட விடுவதும் மாட்டுப் பொங்கலின் சிறப்பாக அமைகிறது. துள்ளித்திரிந்து ஓடிவரும் மாடுகளைப் பிடிக்கும் கட்டிளங்காளைகளாக விடலைகளும், விடலைகளை வேடிக்கை பார்க்கும் இளம் பெண்களும் மகிழ்ச்சி பூரிப்பில் திளைப்பதும் தைப் பொங்கல் முடிந்த மறுநாளில் தான்.
 தமிழர் திருநாளாம் பொங்கலை இன்றளவும் கொண்டாடுவதில் இருந்தே பண்டைய காலத்தில், வாழ்ந்த தமிழக மக்களின் தொன்மைச் சிறப்புகளை நாம் அறிந்து கொள்ள முடிகிறது. தற்கால இளைய சமுதாயத்தினருக்கும், பல்கிப் பெருகிவிட்ட பெருநகர வாழ்மக்களுக்கும் தமிழர்களின் பாரம்பரிய கலாசாரத்தை பறைசாற்றுவதாகவும் தைப் பொங்கல் விளங்குகிறது என்பதை மறுப்பதற்கில்லை.
 "பழையன கழிதலும், புதியன புகுதலும்" என்பதற்கேற்ப, குயவர்களுக்கு வாழ்வாதாரம் அளிக்கக்கூடிய வகையில், வீடுகளில் உள்ள பழைய மட்பாண்டங்களை (பானைகள், குடிநீருக்காக பயன்படுத்தும் குவளைகள்) பொங்கலுக்கு முன்தினம் போட்டுடைத்து விட்டு, தைத்திங்கள் முதல் நாளில் இருந்து புதிய பானைகளில் சமைக்கும் வழக்கமும் தொன்றுதொட்டு இருந்து வந்துள்ளது என்பதை அறிகிறோம். இதனால், மட்பாண்டங்களைச் செய்து பிழைப்பு நடத்துவோருக்கு வருவாய் கிடைப்பதுடன், வீடுகளிலும் புதிய பானைகளுடன் கூடிய நிலை உருவாகி, மனதிற்குப் புத்துணர்ச்சியைத் தரும். பொதுவாகவே மண்பானைகளில் சமைக்கப்படும் உணவு வகைகளுக்கு தனியான சுவையுண்டு என்பதை அவற்றை சாப்பிட்டு ரசித்தவர்கள் அறிய முடியும்.
 தவிர, அதுவரை நிலவிய, பழைய விரும்பத்தகாத சம்பவங்கள் - சங்கடங்கள் எல்லாம் தொலைந்து, புதிய ஆண்டில் - தைத்திங்கள் முதற்கொண்டு அனைத்தும் புதியவையாக - நல்லவையாக நிகழட்டும். முந்தைய ஆண்டில் ஏற்பட்ட கசப்பான அனுபவங்கள் வரும் புத்தாண்டில் நிகழாமல், பொங்கிவரும் பால் போன்று, சர்க்கரைப் பொங்கலின் இனிப்பான சுவையைப் போன்று இருக்கட்டும் என்பதே பாரம்பரிய தத்துவமாகக் கருதப்படுகிறது.
 தற்போதைய தகவல்-தொழில்நுட்ப காலத்தைப் போலல்லாமல், தொலைத்தொடர்பு வசதிகள் இல்லாத அந்நாட்களில், பரம்பரை பரம்பரையாக ஒரு சில குடும்பங்களுக்கே தெரிந்த தங்களின் பாரம்பரிய கலைகளை இளைய தலைமுறையினருக்கு பயிற்றுவித்து, வழிவழியாக அந்தக் கலைகள் சென்று சேரும் விழாவாகவும் பொங்கல் விழா இருந்து வந்துள்ளதை அறிகிறோம். தவில், சிலம்பாட்டம், மயிலாட்டம், ஒயிலாட்டம், தப்பாட்டம், நாதசுரம் இன்னிசை, வாய்ப்பாட்டு, வீணை உள்ளிட்ட தந்தி இசைக்கருவிகளை இசைத்தல், சிலேடையுடன் கூடிய பேச்சுக்கலை, நகைச்சுவை நிகழ்ச்சி என ஒவ்வொரு குடும்பத்திற்கும், அவர்கள் சார்ந்துள்ள சமூகத்திற்கும் உரிய பாரம்பரிய கலைகளை  வளர்ப்பதற்காகவும் இப்பண்டிகையை காலங்காலமாக நம் முன்னோர் பயன்படுத்தி வந்திருக்கிறார்கள். இதனால் பிரத்யேக கலைகள் ஒரு தலைமுறையுடன் முடிந்து விடாமல் அடுத்தடுத்த சந்ததியினருக்கும் சென்று சேர்ந்துள்ளது.
 பொங்கல் திருநாளில் வீட்டில் உள்ள வயதான முதியவர்கள் - அதாவது தாத்தா-பாட்டி தொடங்கி கைக்குழந்தைகள் வரை ஒரே ஊரில் - ஒரே இடத்தில் கூடி பரஸ்பரம் அன்பையும், பாசத்தையும் பரிமாறிக் கொண்டு, பொங்கலைக் கொண்டாடுவதை இன்றளவும் காண முடிகிறது. ஆனால், இன்று கூட்டுக் குடும்பங்களின் எண்ணிக்கை குறைந்து, மைக்ரோ குடும்பங்கள் (கணவன் - மனைவி, ஒரு குழந்தை அல்லது இரண்டு) பெருகிவிட்ட நிலையில், இன்றைய சந்ததியினருக்கு பொங்கல் பண்டிகையை ஏதாவது தென் மாவட்டங்களில் உள்ள கிராமங்களுக்கு அழைத்துச் சென்று காண்பித்தால் மட்டுமே அந்தப் பண்டிகையின் அருஞ்சிறப்பு தெரிய வரும்.
 அதிலும், அறுவடை உள்ளிட்ட விவசாயத் தொழில்களுக்கு அறுவடை எந்திரங்கள், நெற்கதிரில் இருந்து நெல்லை பிரித்தெடுக்கும் எந்திரங்கள் என அனைத்தும் எந்திரகதியாகி விட்டன. மாடுகள் உழவுக்குப் பயன்படுத்தப்பட்ட நிலை மாறி இன்று டிராக்டர்கள் பயன்படுத்தப்படுவது அதிகரித்துள்ளது எனலாம்.
 அதிவேகமாக வளரும் காலத்திற்கு ஏற்ப விவசாய நிலங்களும், காடு-கழனிகளும் மருகிக் கொண்டிருக்கின்றன. தமிழகத்தில் சிறு நகரங்கள் தொடங்கி, பெருநகரங்கள் வரை தொழிற்சாலைகளுக்கும், வீட்டு மனைகளுக்கும், அடுக்குமாடி குடியிருப்புகளுக்கும் கொடுத்தது போக எஞ்சியிருக்கும் விவசாய நிலங்களையாவது பாதுகாப்போம் என்ற உறுதிமொழியை இந்த தைப் புத்தாண்டில் ஏற்போமாக.
 கடந்தவை கடந்தவையாக இருக்கட்டும். நம்மிடம் உள்ள விவசாய நிலங்களை விவசாயத்தைத் தவிர வேறு நோக்கங்களுக்காக விற்க மாட்டோம் என்ற உறுதியையும் ஏற்பதுடன், முந்தைய பசுமையான பொங்கல் நினைவுகளையும், மூதாதையர்களையும் மனதில் எண்ணி பொங்கலைக் கொண்டாடுவோமாக.

தமிழர் பண்பாட்டின் அடையாளமான பொங்கல் பொங்கட்டும், தமிழர்களின் உள்ளத்தைப் போல்!



Ruler can do anything, so Born to rule the Galaxy

Friday, 28 December 2012

Alternative Energy Sources around The World

 In this website we aim to provide information about alternative energy sources around the world, and specifically  to students of a high school level.
 Everyone knows the effect that greenhouse gas production and global warming is having on our earth. We feel that it is vitally important for individuals, and especially governments, to start taking these problems seriously; before it is too late. Even though technology has greatly advanced in the last decade most countries around the world still use fossil fuel-based methods of energy production. The use of these fuels has two major problems; it depletes the natural supply and eventually we will run out; and the burning of the fuel (i.e. coal) creates vast pollution in the form of greenhouse gases (GHG's such as carbon monoxide and dioxide, and sulphur dioxide). It is these gases which lead to global warming and slowly destroy our planet. Only through the use of alternative sources of energy (which are virtually non-polluting) can we slow down this destruction and save our planet.

1.Solar Power
WHAT IS SOLAR POWER?
 Solar power is a viable alternative to fossil fuels and some alternative energy sources, as it gives off no carbon dioxide waste and uses the natural energy from our sun to generate electricity. After the lifetime of the panel, the materials that were used to make it could be recycled as no material is used in the energy generating process. There is also a lot of room for solar power to be used in the development of 3rd world economies, as it is extremely cost effective in the long run.

HOW DOES IT WORK?
 Solar panels have always been thought to be very expensive as it used to be made only from the purest silicon. Solar power has in many ways been eliminated as a viable option as a result of its high manufacturing costs. But a recent breakthrough in the hunt to find an alternative to silicon has dramatically decreased the price of solar power, and also increased it’s effectiveness. This achievement came from South Africa’s own Professor Vivian Alberts from the Johannesburg University and his team of physicists, who have formulated a new procedure of making solar panels using copper-indium-gallium-diselenide (CIGS).
 The production of CIGS solar panels is very complex and any slight deviation from the purest, high-quality elements can result in an ineffective solar cell.
1. Three metals: copper (Cu), gallium (Ga), and indium (In), have to be formed in an extremely pure alloy.
2. Next, the alloy that was formed needs to be converted into an equally pure semiconductor. This is done by adding selenium (Se)into the alloy. This creates a completely new crystal structure forming the CIGS layer of the cell.
3. Then a buffer layer of other semi-conductors are laid carefully on the CIGS layer.
4. The cell is then finished off by attaching conductive electrical contacts (usually molybdenum) on either side

IS IT RENEWABLE?
 Solar power is one of the most renewable ways of energy production. The sun as the energy source is, at least in the foreseeable future, endless and will keep providing us with power. There is no way for us to use up the sun and we don't even have to replenish it. Therefore solar power is definitely a renewable means of energy production.

APPLICATIONS OF SOLAR POWER
 The use of CIGS in the productions of solar panels as an alternative to silicon, gas been undergoing research since 1974, but scientists struggled to find reliable, repeatable, commercially affordable processes to produce this type of solar panel. Professor Alberts revolutionised this industry in inventing an entirely new procedure based on the way that the atoms behave from the beginning to the end of the process. His procedure is going to be implemented in the first full-scale CGIS production plant that uses this procedure, currently being built in Germany by IFE Solar Systems a company that has invested R500-million in this South African invention.

ADVANTAGES
· The sun's energy is free to use, which makes the process cheaper.
· The process is completely non-polluting.
· Can be used in a wide variety of locations the world over. Wherever there is sun.
DISADVANTAGES
· Cost of the panels and equipment is expensive. This will, however, become cheaper in time.
· Can only work when the sun is available; therefore weather dependant.

2.Wind Power
WHAT IS WIND POWER?
 Wind power is when we covert the power of the wind, physical energy, to more useful types of energy. The most common type of energy it is converted to is electricity.
A wind farm is a large area of land on which there are a number of wind turbines generating electricity, as a power plant does. When creating a wind farm one must make sure that the spacing between the turbine is sufficient as not to cause energy/wind loss.
HOW DOES IT WORK?
 The most common type of energy generated from wind is electrical energy. This is by making the use of an electrical generator which is turned by turbine blades which are turned by the wind and thereby turning the turbine, creating electricity.

IS IT RENEWABLE?
 Yes, as we find wind throughout the world and the minimum wind speed needed is from 16km/h upwards. The wind needs to have a constant speed, should be non-turbulent and must not be subject to strong bursts of air. The wind also blows faster the higher into the atmosphere you go. That is why most wind farms are found quite high up.
APPLICATIONS OF WIND ENERGY
You get three types of wind farms:
  • On Shore
  • Near Shore
  • Off Shore
On Shore
 If a wind farm is about three kilometres away from the nearest shoreline it is regarded as an on shore wind farm. They are normally installed in the mountainous areas as the higher you go the faster the wind blows. The cliffs and mountains also contribute to speeding up the wind. Before setting up a wind farm much research has to be done because the smallest diffenrence of placement could even double the turbines' output.

Near Shore
 If a wind farm lies on land within three kilometres to the nearest shore line or lying on the water within ten kilometres from the shore it is considered a near shore wind farm. Sea shores tend to be very windy as the land and sea heat up and cool down at different rates, creating strong winds. The wind from the sea is also more dense and therefore carries more energy than the same speed wind in mountainous terrain.
Off Shore
 If a wind farm is more than ten kilometres into the sea form a shore then it is considered to be off-shore. Off-shore turbines are found in deep sea waters and are usually much larger than their land-based siblings. The wind over the open sea is considerably faster and stronger than that of land because they have no obstacles in their way such as trees and buildings to affect the wind speed. Their distance from land allows companies to create larger ones and they do not need to worry about any noise factors as they are a considerable distance from the shore. The off-shore wind farms are the most expensive to build as they need to be set in the open ocean where they are subjected to all the earths's elements, therefore raising the maintence cost of off shore wind farms. The cost involved in transferring the electricity from the turbine to the land could be large as there is a large distance to be covered. Off shore wind farms are much larger than the on shore counterparts as there is much more space in the open sea as opposed to land and there are no worries of people complaining about them in the sea.
Airborne
 This is a new concept with no product available as yet but there are companies busy developing an airborne wind turbine which is suspended high in the atmosphere thereby obtaining the fastest and strongest winds available.
ADVANTAGES
  • Wind is free and in abundance and we have the technology to capture the power of wind efficiently
  • The costs for wind turbines are only initial costs; once the turbine is built there are minimal maitenence costs which are involved.
  • In the rural areas which are not connected to a country's power grid it can be used to generate its own power.
  • The space which a wind turbine takes up on land is very small as the moving parts are quite a distance above the ground.
  • Wind turbines produce energy with minimal damage to the worlds environment and produces "clean power".
DISADVANTAGES
  • Some pollutants are given off into the atmosphere in the creation of a wind turbine.
  • Wind turbines can be quite noisy.
  • The wind speed is not constant and therefore there will not always be a definite supply of electricity form a wind turbine.
  • Large numbers of wind turbines are needed to power towns, as the largest turbine is able to produce electricity to sustain only +/- 500 homes.
  • Many people feel that wind turbines are unsightly and that they should not disrupt the natural beauty of landscapes.
3.Nuclear Power
WHAT IS NUCLEAR POWER?
 Nuclear power is an alternative power source that uses the nuclear fission of uranium to create heat and, thereby, through a heat transfer mechanism and turbines, create electricity.

HOW DOES IT WORK?
 For a nuclear reactor to create energy it is necessary for nuclear fission to take place. This occurs when an atom is split into smaller particles and an enormous amount of energy is released in the process. Uranium is used as the fuel for the reaction as it is radioactive, and is therefore unstable enough to be broken down into smaller parts. The uranium atom absorbs a neutron and splits into two equal parts and energy is created. This kinetic energy becomes heat energy as the particles slow down, and it is this heat energy, which is used to produce electricity. The heat is moved through a transfer medium, such as water, and is used to turn water into steam. This steam turns a turbine, which is connected to a generator. As the turbine turns the generator it creates electricity, which is then transferred to the consumers.

IS IT RENEWABLE?
 Nuclear power is renewable as it doesn't use fossil fuels or other non-renewable resources in the production of energy; however it isn't as renewable as some of the alternatives, such as wind or solar power, which rely solely on natural phenomena to create their power. In the short term it is unlikely that uranium will run out, but eventually it will. Therefore we can say that nuclear power is only renewable in the short term.
APPLICATIONS OF NUCLEAR POWER
 About 440 nuclear reactors are used around the world to produce about 17% of the world's electricity but in theory nuclear fission can be used for much more. At the end of the Second World War the Allies secured victory by dropping the atomic bomb on Japan. The bomb uses the same principles of splitting the atom as the nuclear reactors do in creating electricity. On a smaller, less destructive scale, the theories of nuclear fission are used daily in medicine. Scanning devices and the treatment of cancer both use the radiation from splitting an atom.
ADVANTAGES
  • As an alternative to normal coal-based electricity production nuclear power is favourable as it is much more efficient than coal (250g of uranium produces 20000 times more electricity than 250g of coal) and is far less polluting, especially to our atmosphere, as no harmful greenhouse gases are emitted. (ie. carbon monoxide, sulphur dioxide, nitrogen oxide etc.).
  • It is generally a reliable process that can be counted on to produce electricity for many years (average availability over three years is about 80%).
  • The amount of waste produced each year would cover only your dining room table!
  • The waste is stored in fire-, water-, and earthquake-proof capsules to ensure safety.
DISADVANTAGES
  • There is pollution in the form of radioactive waste but with new technologies the process is becoming cleaner and safer each year.
  • The possibility of radiation leakage or plant meltdown. This is possible in theory and has happened in the past (Chernobyl in Russia) but nowadays there are procedures in place to ensure safety.
  • There are problems and dangers, which could lead to accidents. The power stations are all manually run and human error could lead to possible accidents.
  • The reactors also have a very expensive capital outlay in the beginning, although the costs are cheaper in the long run.
  • The plants do require downtime for maintenance.
4.Hydro Power
WHAT IS HYDRO POWER?
 Hydro power is the process of changing the kinetic energy of flowing water in a river into electrical power that we can use.
HOW DOES IT WORK?
 A dam is built where there is a natural lake or a big river in a valley. The dam is used to hold the water and create pressure so that the water can produce more electrical power. There is gravitational potential energy stored in the water and this energy is used to turn generators and create electricity. These turbines are within tunnels in the dam wall. Electrical generators are turned by these massive turbines and create electricity. Water flows through these tunnels with great pressure and is used to turn these turbines. The water has immense pressure due to the great height at which is kept in the dam. If there is a greater volume of water or there is a very large difference between the water level and where it flows out than you can get more power out of the water as it has greater potential energy. This difference in height of the water is called the head. The generator contains 2 main parts: the rotor and the stator. The rotator is the part which rotates and the wire has a huge magnet inside of it; and the stator is the part which is covered in copper. The electrical current is created when the rotor spins around the copper wire on the stator. This is the charge which is then used as electricity.

IS IT RENEWABLE?
 It is renewable because the process takes nothing away from the environment and therefore nothing needs to be replenished. The water stays in the water cycle and can keep producing energy endlessly.

APPLICATIONS OF HYDRO POWER
 Hydro power is also utilised by large scale companies as a private use. Many large mining companies or aluminium manufacturers use vast amounts of electrical so rather than buying from the state they can generate their own power by using hydro power generation.
ADVANTAGES
  • No pollution or waste produced
  • Renewable energy source
  • Very reliable energy source
  • Not expensive to maintain once the dam has been built
  • Can increase the plants production or decrease it whenever there is high or low demand
  • Water can be stored, waiting to be used in peak times
DISADVANTAGES
  • Building the dam is expensive and time taking
  • The dam will change the habitat and landscape upstream, as much more land will be submersed
  • The land below the dam is also affected as the flow of water is reduced
  • Silt can build up in the dam as the water slows down it does not have enough energy to carry the sand and silt which it was
5.Tidal Power
WHAT IS TIDAL POWER? Tidal Power is the generation of electrical power through the harnessing of the ebb and flow of the tides.
HOW DOES IT WORK?
A barrage, which is in fact a huge dam, is built across a river estuary or bay. This barrage has gates in it which allow the water to flow into the barrage with the incoming tide. These gates are then closed when the tide begins to go back out. This water which is now trapped inside the barrage is now called a ‘hydrostatic head’. The greater the head the more power can be generated from the outflowing water. There are other gates within the barrage which are now opened; these gates contain hydro-electric generators, very similar to the ones used in Hydropower. These generators are now turned by the outflowing water and power is generated.

The tidal range has to be sufficient in order for this to be a practical means to generate power. This range should be in excess of 5 metres otherwise the power generated is not sufficient.
The main downfall of tidal power generation is the capital needed at the beginning of the project to construct the barrages and the effect on the environment by the change in the water levels. But once the barrages have been built there is a very low maintenance cost. The generators only need changing once every 30 or so years and there is very little work needed to be done.
IS IT RENEWABLE?
 Yes, the tides will continue to ebb and flow, thus there will always be power being generated. The water is not used up, it stays in the water cycle, and can therefore be used over and over again without the need for replenishment.

APPLICATIONS OF TIDAL POWER
 Small-scale tidal mills were used in the Middle Ages for grinding corn. The barrages which are built can be used as a means to cross the estuary with much greater ease. The main application of tidal power is as an additional means of generating renewable, sustainable energy which does not affect the environment in a negative way.

ADVANTAGES
· It is very cheap to maintain
· There is no waste or pollution
· Very reliable
· We can predict when tides will be in or out
· The barrage can help to reduce the damage of very high tidal surges or storms on   the land

DISADVANTAGES
· It changes the coastline completely and the estuaries are flooded so any mud flats   or habitats that birds or animals live on are destroyed
· Initial building cost is very expensive
· Water is not replenished, it cannot flow away so any dirt or pollution lingers around   the coast much longer
· Silt builds up behind the barrage
· Disrupts creatures’ migration in the oceans
· Needs a very big piece of sea to be cost effective
· Not many sites suitable for this kind of power generation; building the barrage
· Only produces power for about 10 hours of the day
6. Biomass
WHAT IS BIOMASS?
 In the developed world biomass is becoming more important for dual applications such as heat and power generation.
 Biomass is a clean renewable energy resource derived from the waste of various human and natural activities. It excludes organic material which has been transformed by geological processes into substances such as coal or petroleum.
 The energy of biomass is extracted from three distinct sources:
  • Wood
  • Waste
  • Alcohol fuels
  • Crops
  • Landfill gases

 Wood is the largest energy source of biomass: contributors include the timber industry, agricultural crops and raw materials from the forest.
 Waste energy is the second largest source of biomass energy. The main contributors are: municipal solid waste and manufacturing waste.
 Alcohol fuels is the third largest contributor and is derived mainly from corn.
Any source can be used to fuel biomass energy production. We can use rubbish, animal manure, woodchips, seaweed, corn stalks and other wastes. Biomass is matter usually thought of as garbage. Some of the sources are just lying around: dead trees, left-over crops, woodchips, sawdust from lumber mills, even used tires and livestock manure will do.
 In California, USA, more than 60 million tons of energy sources for biomass energy are collected each year. If all these sources were used to create biomass energy, California could make up to 2000 megawatts of electricity. That is enough to make electricity for about 2 million homes.
HOW DOES IT WORK?
 The harnessing of energy from biological mass (biomass) is a simple process. The waste wood and other sources are gathered in big trucks. The waste is then transported to a biomass plant. Here, the waste is fed into furnaces where it is burned. The heat created is used to boil water and the energy from the steam is used to rotate turbines and generators.
 The second method, through which energy is created, is called Landfill Gas. When garbage is burned or is allowed to decompose it gives off methane gas. Pipelines are put into the landfills (pits in which garbage is burned) and the methane gas is collected. It is then used to make energy in power plants.

 The use of biomass can help reduce Global Warming. Plants use and store carbon dioxide (CO2) when they grow. When it burns or decomposes, it releases the CO2. Replanting plants, crops or trees etc. ensures that the C02 is reused. If the plants are not replanted the biomass will disrupt the natural carbon equilibrium and thus continue to contribute towards Global Warming.

IS IT RENEWABLE?
 Biomass is renewable; we are going to carry on making waste products, plants and trees are going to die and the cycle will continue. This ensures that the sources contributing to biomass are always available.
The use of biomass can be environmentally friendly because the biological mass is reduced, recycled and then re-used.
 Innovations and ideas in which biomass can be used are continually being invented. One such way is the production of ethanol, a liquid alcohol fuel. Ethanol can be used in special types of cars that have been manufactured to accept alcohol fuels instead of petrol. This innovation helps reduce our dependence on oil.
APPLICATIONS OF BIOMASS ENERGY
 Biomass energy provides an alternative source of energy. In rural India biomass is used for cooking and agricultural growth. It has been very useful for village households that own cattle. Through a simple process the cattle dung is used to produce a gas which is then used as fuel for cooking. The surplus dung is used as manure.
 The use of sugarcane to produce electricity is increasingly being used in Indian sugar mills: this is being done to clean the environment, cut down power costs and earn additional revenue. After the juice has been extracted from the sugarcanes, the leftover pulp - bagasse - is sold to power plants. Here, the bagasse is burned. The energy produced is then provided to the sugar mills.
 Biomass power plants are becoming very popular. Using resources that are easily available makes the production of energy efficient and reliable.
ADVANTAGES
  • Biomass can be used for fuels, power production and products that would otherwise be made from fossil fuels.
  • It does not add CO2 to the atmosphere as it absorbs the same amount of carbon in growing as it releases when consumed with fuel.
  • It can be used to generate electricity with the same equipment or power plants that are now burning fossil fuels.
  • It is sensible to use waste products where we can.
  • Biomass fuel generally tends to be cheap.
  • Using biomass sources places less demand on the Earth's resources.
  • The use of biomass energy has the potential to greatly reduce greenhouse gas emissions.
  • The use of biomass can reduce dependence on foreign oil.
DISADVANTAGES
  • Collecting sufficient quantities of waste can be difficult.
  • Burning the fuel creates greenhouse gases, although only a very little.
  • Certain materials aren't always available.

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