The Stuff We Learn After A Plane Goes Missing ….

 

While we search for flight MH370, what else have we learnt? Photo: Vasudevan Mukunth

While we search for flight MH370, what else have we learnt?

During the search for Malaysian Airlines flight 370, many interesting facts have cropped up – about how planes navigate, how phones ring, even disturbing things like pilot suicide. What other secrets does the world of aviation hold?

It’s likely any of you knew many of or all the following, but these are things I became aware of from reading news items and analyses of the missing Malaysian Airlines flight 370, currently one of hijacked, crashed into a large water-body or next-plausible-occurrence. While some of them may not directly apply to the search for any survivors or the carrier, all of them shine important and interesting light on how things work.

Ringing phones aren’t actually ringing. Yet. – After the relative of a passenger on board flight 370 called up the person’s phone, it started to ring. This was flashed on TV channels as proof of the plane still being intact, whether or not it was in the air. A couple hours later, some telecom experts wrote in that the first few rings you hear aren’t rings that the call’s receiver is hearing, too. Instead, those are the rings the network relays to you so you don’t cut the call while it looks for the receiver’s device.

Air-traffic controllers don’t always know where the plane is* – Because planes are flying at 35,000 feet, controllers don’t anticipate much to happen to them, and they’re almost always right. This is why, while cruising at that altitude, pilots don’t constantly buzz home to controllers about where their flight is, its altitude, its speed, etc. To be on the safe side, they buzz home over specific intervals, a process that’s automated on some modern models. Between these intervals, of course, the flight might just as well be blinking in and out of extra dimensions but no one is going to have an eye on it.

Radar that controllers have access to don’t work so well beyond a range of 150-350 km** – If civilian aircraft are farther than this, they no longer show up as pings on the scanning screen. In fact, in another system, called automatic dependent surveillance-broadcast (ADS-B), a plane determines its location based on GPS and transmits it down to a controller.  Here again, there’s a distance limit of up to 300 or so km. Beyond this, they communicate over high-frequency radio. Of course, this depends on the quality of equipment, but it’s useful to know such limitations exist.

If a plane’s communication systems have been disabled, there’s no Plan B – There’s radar, then radio, then GPS, then a fourth system where the aircraft’s computers communicate via satellite with the airline’s offices. The effectiveness of radar and radio is contingent on weather conditions. Beyond a particular altitude and, again, depending on the weather, GPS is capable of blinking out. The fourth system can be be manually disabled. If a renegade technician on the flight knows these things and how to work them, he/she can take the flight off the grid.

For pilots, it’s aviate, navigate, and then communicate – If the flight is in some kind of danger, the pilot’s primary responsibility is to do those things necessary to tackle the threat, and try and get the carrier away from the danger area. Only then is he/she obligated to get in touch with the controllers.

The ocean is a LARGE place – Sure, we studied in school that the oceans cover 71% of Earth’s surface and contain 1.3 billion cubic km of water, but those were just numbers – big numbers, but numbers nonetheless. I think our sense of bigness isn’t reliant any bit on numbers but only on physical experiences. I’m 6’4″ tall, but you’ll have to come stand next to me to understand how tall I really am. That said, I now quote former US Navy sailor Jim Wright (from his Facebook post):

… even when you know exactly, and I mean EXACTLY, where to look, it’s still extremely difficult to find scattered bits of airplane or, to be blunt, scattered bits of people in the water. As a navy sailor, I’ve spent days searching for lost aircraft and airmen, and even if you think you know where the bird went down, the winds and the currents can spread the debris across hundreds or even thousands of miles of ocean in fairly short order. No machine, no computer, can search this volume, you have to put human eyeballs on every inch of the search area. You have to inspect every item you come across – and the oceans of the world are FULL of flotsam, jetsam, debris, junk, trash, crap, bits, and pieces. Often neither the sea nor the weather cooperates, it is INCREDIBLY difficult to spot [an] item the size of a human being in the water, among the swells and the spray, even if you know exactly where to look – and the sea conditions in this part of the world are some of the worst, especially this time of year.

Mr. Wright goes on to write that should flight 370 have crashed into the Bay of Bengal, the South China Sea or wherever, its leaked fuel wouldn’t exactly be visible as an oil slick because of two reasons: first, high-grade aircraft fuel evaporates really fast (if it hasn’t already been vaporized on its way down from the sky); second, given the size of the fuel-tank, such a slick might cover a few square kilometers: on an ocean, that’s a blip. The current extended search area spans 30,000 sq. km.

One of the simplest ways armored units know what they’re seeing in the sky is not a missile but a civilian aircraft is by their trajectory – This is the shape of their path. Most missiles are ballistic, which means their trajectories are like upturned Us. Aircraft, on the other hand, fly in a straight line. I suppose this really is common sense.

The global positioning system doesn’t continuously relay the aircraft’s location to controllers – See * and **.

Smaller nations advance pilots with fewer flying hours than is the norm in bigger nations – According to a piece on CNN, one of flight 370’s two pilots had clocked only 2,763 flying hours as a pilot, and was “transitioning from flight simulator training to the Boeing 777-200ER”. The other pilot had a little over 18,000 hours under his belt. As CNN goes on to explain, smaller nations tend to advance pilots they think are very talented, farther than they could go in the same time in other countries, through intensive training programs. I couldn’t find anything substantive on the nature of these supposedly advanced programs, so I can’t comment further.

Pilot suicide – Nobody wants a person at the controls who’s expressed suicidal tendencies, and it’s the airline’s responsibility to treat or accordingly deal with such people. However, the moment you’ve said that, you realize how difficult such situations could be to predict, not to mention how much more difficult to prevent. A report by the US Federal Aviation Administration titled ‘Aircraft-Assisted Pilot Suicides in the United States‘, from February 2014, describes eight case-studies of flights whose pilots have killed themselves by crashing the aircraft. Each study describes the pilot’s behavior during the flight’s duration and is careful to note no other electric/mechanical failures were present. In the case of flight 370, of course, pilot suicide is just a theory.

The Boeing 777 is one safe carrier – Since its first flight in 1994, the Boeing 777-200ER (for ‘Extended Range’) had an estimated full loss equivalent (FLE) of 0.01 as of December 31, 2012, over 6.9 million flights. According to AirSafe.com, the FLE…

… is the sum of the proportions of passengers killed for each fatal event. For example, 50 out of 100 passengers killed on a flight is an FLE of 0.50, 1 of 100 would be a FLE of 0.01. The fatal event rate for a set of fatal events is found by dividing the total FLE by the number of flights in millions.

The same site also lists the 777-200ER as having the second lowest crash rate – 0.001 per million flights – of all time, among all models with 2 million flights or more, as of September, 2013. Only the Airbus A340 is better with a crash rate of 0, although it has clocked 4 million fewer flights (just saying).

Southeast Asia is a busy area for aviation – Between April-2012 and October-2013, the number of seats per week per Southeast Asian country grew by an average of 19.4%. In the same 18 months, the entire region’s population grew by 6% (both numbers courtesy the Center for Asia-Pacific Aviation). Then, of course, there’s Singapore’s Changi Airport. It’s one of Asia’s busiest, if not the world’s, handling 6,100 flights a week. And it was in this jam-packed area that people were trying to look for one flight.

source::::Vasudevan Mukunth  in The Hindu …

BLOGS » THE COPERNICAN

natarajan

New iPhone in September 2014…

 

APPLE is to release its newest iPhone in September, with higher resolution and bigger screens, a report says, its latest salvo in the smartphone wars where it has lost global market share to rivals such as Samsung.

The new handset, expected to be called the iPhone 6, is to come in two versions with a 4.7- or 5.5-inch screen, both bigger than the current four-inch panel, the respectedNikkei business daily said on Friday, without citing sources.

US-based Apple is ordering its higher-resolution liquid crystal display screens from Japanese electronics giant Sharp, Japan Display and South Korea’s LG Display, it added.

Apple released the iPhone 5 in September 2012 and newer versions in the series last year.

A Japan-based spokesman for the California tech giant could not be immediately reached for comment on the Nikkei report, which was widely picked up by a string of technology news websites.

The Nikkei story comes after Taiwan’s Commercial Times said this month that Taiwan Semiconductor Manufacturing Co. had started producing chips for the next iPhone.

That news fed rumours that Apple is reducing its reliance for parts on South Korean giant Samsung, its main competitor in the mobile phone market and a bitter rival with which it is contesting several copyright court battles globally.

Samsung in February unveiled its new flagship Galaxy S5 smartphone armed with a fingerprint scanner and a built-in heart rate sensor, as it tries to cement its leadership of the multimillion-dollar market.

However, the South Korean giant voiced annoyance after domestic telecoms operators released its latest smartphone ahead of schedule in order to dodge sales restrictions imposed by regulators. The world’s biggest mobile phone maker had planned a worldwide debut of the Galaxy S5 on April 11.

Samsung made about 30 per cent of all smartphones sold globally last year, nearly twice the share of Apple.

 

source::: news.com.au

natarajan

Message for the Day…” In Every being There is Complete Divine Power…”

 

There is immeasurable strength and great power within us. Today, we have many satellites which go into space. Who created them? It is our scientists. How did they achieve this? This is because of the power that is already manifest in them. They worked hard and further developed that capability in them, and then the power to achieve the goal manifested. So too, if you develop that power through hard work, you too can accomplish great things. In every being, there is complete Divine Power. How can we use that power to attain God? Assume there is a small drop of water. When under hot Sun, it evaporates within a moment. However if you pour these few drops of water into the sea, they merge and become one with the ocean. So too, with adequate effort, if you lose your individual identity to the Supreme, then you too merge in Him and become One with Him.

 

Sathya Sai Baba

” Forget the Internet….Soon There will Be OuterNet …” !!!

 

  • An ambitious project known as Outernet is aiming to launch hundreds of miniature satellites into low Earth orbit by June 2015
  • Each satellite will broadcast the Internet to phones and computers giving billions of people across the globe free online access
  • Citizens of countries like China and North Korea that have censored online activity could be given free and unrestricted cyberspace
  • ‘There’s really nothing that is technically impossible to this’

 

You might think you have to pay through the nose at the moment to access the Internet.

But one ambitious organisation called the Media Development Investment Fund (MDIF) is planning to turn the age of online computing on its head by giving free web access to every person on Earth.

Known as Outernet, MDIF plans to launch hundreds of satellites into orbit by 2015.

And they say the project could provide unrestricted Internet access to countries where their web access is censored, including China and North Korea.

The ISS could be a testbed for Outernet technology

Could our Internet one day be delivered from space?

The New York company plans to ask NASA to test their Outernet technology on the International Space Station (left) so that they can begin broadcasting Wi-Fi to web users around the world (right)

 

Using something known as datacasting technology, which involves sending data over wide radio waves, the New York-based company says they’ll be able to broadcast the Internet around the world.

The group is hoping to raise tens of millions of dollars in donations to get the project on the r

 

The Outernet team claim that only 60% of the world’s population currently have access to the wealth of knowledge that can be found on the Internet.

This is because, despite a wide spread of Wi-FI devices across the globe, many countries are unable or unwilling to provide people with the infrastructure needed to access the web.

The Outernet project is aiming to raise tens of millions of dollars to launch hundreds of miniature satellites known as cubesats to make their dream a reality

The Outernet project is aiming to raise tens of millions of dollars to launch hundreds of miniature satellites known as cubesats to make their dream a reality

 

The company’s plan is to launch hundreds of low-cost miniature satellites, known as cubesats, into low Earth orbit.

Here, each satellite will receive data from a network of ground stations across the globe.

Using a technique known as User Datagram Protocol (UDP) multitasking, which is the sharing of data between users on a network, Outernet will beam information to users.

Much like how you receive a signal on your television and flick through channels, Outernet will broadcast the Internet to you and allow you to flick through certain websites.

THE OUTERNET PROJECT TIMELINE

By June of this year the Outernet project aims to begin deploying prototype satellites to test their technology

In September 2014 they will make a request to NASA to test their technology on the International Space Station

By early 2015 they intend to begin manufacturing and launching their satellites

And in June 2015 the company says they will begin broadcasting the Outernet from space

‘We have a very solid understand of the costs involved, as well as experience working on numerous spacecraft,’ said Project Lead of Outernet Syed Karim, who fielded some questions on Reddit.

‘There isn’t a lot of raw research that is being done here; much of what is being described has already been proven by other small satellite programs and experiments.

There’s really nothing that is technically impossible to this’

But at the prospect of telecoms operators trying to shut the project down before it gets off the ground, Karim said: ‘We will fight… and win.’

If everything goes to plan, the Outernet project aims to ask NASA for permission to test the technology on the International Space Station.

And their ultimate goal will be to beginning deploying the Outernet satellites into Earth orbit, which they say can begin in June 2015.

source::::Mailonline.com Uk

NATARAJAN

Read more: http://www.dailymail.co.uk/sciencetech/article-2552177/Forget-Internet-soon-OUTERNET-Company-plans-beam-free-wi-fi-person-Earth-space.html#ixzz2x56VNDjQ

Image of the Day…

Saturn’s largest and second-largest moons

The Cassini spacecraft captured this image on June 16, 2011. These are two of Saturn’s moons – the largest moon Titan and second-largest moon Rhea.

Saturn's largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this true-color scene from NASA's Cassini spacecraft.  Image via NASA/JPL-Caltech/Space Science Institute.

Saturn’s largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this true-color scene from NASA’s Cassini spacecraft. Image via NASA/JPL-Caltech/Space Science Institute.

Titan’s north polar hood can be seen. It’s 3,200 miles (5,150 kilometers) across. The hood appears as a detached layer at the top of the moon on the top right.

This view looks toward the Saturn-facing side of Rhea (949 miles or 1528 kilometers across). North on Rhea is up and rotated 35 degrees to the right.

Images taken using red, green and blue spectral filters were combined to create this natural-color view. The images were acquired with the Cassini spacecraft narrow-angle camera on June 16, 2011, at a distance of approximately 1.1 million miles (1.8 million kilometers) from Rhea and 1.5 million miles (2.5 million kilometers) from Titan. Image scale is 7 miles (11 kilometers) per pixel on Rhea and 9 miles (15 kilometers) on Titan.

Via NASA

SOURCE:::: earth sky news site

natarajan

World Water Day… 22 March …”Water and Energy are Interlinked and Interdependent…”

World Water Day 2014: Water and Energy

Azzizia desalination plant, Saudi Arabia – Flickr CC BY-NC-SA 2.0 by Waleed Alzuhair

Water and energy are closely interlinked and interdependent. Energy generation and transmission requires utilization of water resources, particularly for hydroelectric, nuclear, and thermal energy sources. Conversely, about 8% of the global energy generation is used for pumping, treating and transporting water to various consumers.

In 2014, the UN System – working closely with its Member States and other relevant stakeholders – is collectively bringing its attention to the water-energy nexus, particularly addressing inequities, especially for the ‘bottom billion’ who live in slums and impoverished rural areas and survive without access to safe drinking water, adequate sanitation, sufficient food and energy services. It also aims to facilitate the development of policies and crosscutting frameworks that bridge ministries and sectors, leading the way to energy security and sustainable water use in a green economy. Particular attention will be paid to identifying best practices that can make a water- and energy-efficient ‘Green Industry’ a reality.

Objectives of World Water Day in 2014

Selling fuel wood at wood market in Cambodia ©FAO/J. Koelen
Geothermal Power Station in Þingvellir, Iceland – Flickr CC BY-NC-ND 2.0 by Scott Ableman
  • Raise awareness of the inter-linkages between water and energy
  • Contribute to a policy dialogue that focuses on the broad range of issues related to the nexus of water and energy
  • Demonstrate, through case studies, to decision makers in the energy sector and the water domain that integrated approaches and solutions to water-energy issues can achieve greater economic and social impacts
  • Identify policy formulation and capacity development issues in which the UN system, in particular UN-Water and UN-Energy, can offer significant contributions
  • Identify key stakeholders in the water-energy nexus and actively engaging them in further developing the water-energy linkages
  • Contribute as relevant to the post-2015 discussions in relation to the water-energy nexus.

 

 

World Water Day 2014 Key Messages

World Water Day is about what you will do in 2014 and beyond to promote  sustainable practices in the realm of water and energy. The key messages provided below are to be used as a basis to help you frame and design your own activities and messages. You can adapt the messages to your local conditions or to your specific audience to make them more targeted and efficient.


Coal and firewood in Ulaanbaatar ©FAO/Sean Gallagher
Electric motor irrigation pumps for small-scale farming in Kenya CC by DIVatUSAID on Flickr

1. Water requires energy and energy requires water

Water is required to produce nearly all forms of energy. Energy is needed at all stages of water extraction, treatment and distribution.

2. Supplies are limited and demand is increasing

Demand for freshwater and energy will continue to increase significantly over the coming decades. This increase will present big challenges and strain resources in nearly all regions, especially in developing and emerging economies.

3. Saving energy is saving water. Saving water is saving energy

Choices concerning the supply, distribution, price, and use of water and energy impact one another.

4. The “bottom billion” urgently needs access to both water and sanitation services, and electricity

Worldwide, 1.3 billion people cannot access electricity, 768 million people lack access to improved water sources and 2.5 billion people have no improved sanitation. Water and energy have crucial impacts on poverty alleviation.

5. Improving water and energy efficiency is imperative as are coordinated, coherent and concerted policies

Better understanding between the two sectors of the connections and effects on each other will improve coordination in energy and water planning, leading to reducing inefficiencies. Policy-makers, planners and practitioners can take steps to overcome the barriers that exist between their respective domains. Innovative and pragmatic national policies can lead to more efficient and cost effective provision of water and energy services

 

source::::www.unwater.org

natarajan

ஆப்பிள் ஏன் விழுந்தது? – நியூட்டன் ‘பரபரப்பு’ பேட்டி!!!

நியூட்டனின் விதிகளை எளிமையாக விளக்கும் வகையில் ஒரு கற்பனை உரையாடல்!

நிருபர்: நியூட்டன் சார், ஆப்பிள் உங்கள் தலையில் விழுந்த கதை உண்மையா?

நியூட்டன்: கெப்ளர் கண்டுபிடித்த கோள்களின் இயக்க விதிகளை மூன்று நாட்களாக விடாமல் படித்துக்கொண்டிருந்தேன். கோள்களெல்லாம் சூரியனை நீள்வட்டமாகச் சுற்றிவருவதுபற்றி அவற்றின் மூலம் அறிந்தேன். அப்போது எனக்குப் பசி தாங்க முடியவில்லை. அந்த வாசிப்பைத் தொடர முடியாததால், ஆப்பிளைப் பறித்துச் சாப்பிட்டுவிட்டு வந்துவிடலாம் என்று தோட்டத்துக்குச் சென்றேன்.

நிருபர்: அப்போதுதான் அந்த ஆப்பிள் உங்கள் தலையில் விழுந்ததா?

நியூட்டன்: இல்லை, அது என் கையில் விழுந்தது.

நிருபர்: உங்களுக்குப் பசி எடுக்கிறது என்று ஆப்பிளுக்கு எப்படித் தெரியும்? அல்லது கடவுள் செயலா?

நியூட்டன்: கடவுள் செயலல்ல, கெப்ளர் செயல்.

நிருபர்: எப்படி?

நியூட்டன்: கோள்களைப் பற்றிய அவரது கண்டுபிடிப்புதான், ஆப்பிள் எப்படி நேராக என் கையில் வந்து விழுந்தது என்பதை எனக்குப் புரிய வைத்தது. கோள்களின் சுற்றுப்பாதை சூரியனை மையம் கொண்டு எப்படி ஒரு நீள்வட்டமாக அமைகிறது என்பதை அவர்தான் புரியவைத்தார்.

நிருபர்: கிரகங்களின் சுழற்சி எல்லோருக்கும் தெரிந்த விஷயம்தானே?

நியூட்டன்: மேலும் அவர் சொன்னது, “சூரியனிலிருந்து ஒரு விசை வெளிவந்து கோளங்களைப் பற்றிக்கொள்கிறது.” அதிலிருந்து நான் சொல்வது, “பூமி தன் புலப்படாத கைகளால் ஆப்பிளைப் பற்றிக்கொள்கிறது.”

நிருபர்: ஆப்பிளைப் பற்றியது உங்கள் கைதானே?

நியூட்டன்: சூரியனிலிருந்து வெளிவரும் விசைபோல் பூமியிலிருந்து ஒரு விசை வெளி வந்து அதைச் சுற்றியுள்ள அனைத்தையும் பற்றிக்கொள்கிறது என்பதைத்தான் நான் அப்படிச் சொன்னேன். கோள்கள், விண்மீன் திரள், ஆப்பிள், நீங்கள், நான் அனைத்தும் அசைவது ஒரு விதியின் கீழ்தான். அதுதான் ‘நியூட்டனின் ஈர்ப்பு விதி’.

நிருபர்: சூரியனைச் சுற்றும் சனி அல்லது புதனைப் போல் ஆப்பிள் ஒன்றும் பூமியைச் சுற்றவில்லையே?

நியூட்டன்: ஆப்பிளால் சுற்ற முடியும்.

நிருபர்: எப்படி?

நியூட்டன்: கொஞ்சம் கற்பனைசெய்து பாருங்கள். மிகமிகப் பலத்துடன், அதாவது பூமியின் ஈர்ப்பு விசையை அது சமாளிக்கக் கூடிய அளவு பலத்துடன் வீசியெறிந்தால் அது பூமியைச் சுற்ற ஆரம்பித்து, தொடர்ந்து சுற்றிக்கொண்டிருக்கும்.

நிருபர்: ஆ… புரிகிறது, பூமியைச் சுற்றும் செயற்கைக்கோள்களைப் போல…

நியூட்டன்: என் கணக்குப்படி ஆப்பிளை ஒரு நொடிக்கு 11 கிலோ மீட்டர் வேகத்தில் வீசினால், பூமியின் ஈர்ப்பு விசையிலிருந்து ஆப்பிள் விடுபட்டுவிடும். அதையே நொடிக்கு 42 கிலோ மீட்டர் வேகத்தில் வீசினால், சூரியனின் ஈர்ப்பு விசையிலிருந்து விடுபட்டு அண்டவெளியில் சுதந்திரமாகப் பயணிக்கத் தொடங்கிவிடும், இன்னொரு கோளின் அல்லது இன்னொரு நட்சத்திரத்தின் ஈர்ப்பு வலையில் விழும்வரை.

நிருபர்: ஆகையால் உங்கள் புகழ்பெற்ற ஈர்ப்பு விதி ஆப்பிளிலிருந்துதான் வந்தது.

நியூட்டன்: ஆமாம். நிறையுள்ள பொருள்கள் எல்லாமே ஒன்றையொன்று ஈர்க்கும் தன்மையுடையன. ஆகையால் மனிதர்கள் நாம் அனைவரும் ஒன்றாக இணையப் படைக்கப்பட்டவர்கள்.

நிருபர்: ஆப்பிளைச் சாப்பிடாமல் ஏன் அதைப் பார்த்தபடியே நிற்கிறீர்கள்?

நியூட்டன்: ஆப்பிளின் சிவப்பு நிறத்தைக் கவனித்தீர்களா?

நிருபர்: அதில் என்ன இருக்கிறது?

நியூட்டன்: சூரியனின் ஒளி ஆப்பிளின் தோல்மீது எதிரொலிப்பதால் ஆப்பிள் நம் கண்களுக்குத் தெரிகிறது.

நிருபர்: இதில் என்ன விஷயம்?

நியூட்டன்: சூரியனின் ஒளி வெண்மையாக இருக்க, அது எப்படி சிவப்பாகப் பிரதிபலிக்கிறது?

நிருபர்: ஆப்பிளின் தோல், ஒளியின் நிறத்தை மாற்றிவிடுகிறது.

நியூட்டன்: இல்லை இல்லை. சில நாள்களுக்கு முன்பு நான் ஒரு ஆராய்ச்சியில் ஈடுபட்டேன். சூரிய ஒளியை ஒரு முப்பட்டகம் (ப்ரிஸம்) வழியே செலுத்தினேன். அது வானவில்லாக வெளிவந்தது.

நிருபர்: ஊதா, கருநீலம், நீலம், பச்சை, மஞ்சள், ஆரஞ்சு, சிவப்பு.

நியூட்டன்: வெண்மை என்பது ஒரு நிறமல்ல, அது அனைத்து நிறங்களின் கூட்டல்.

நிருபர்: ஓ, எல்லா நிறங்களின் தொகுப்பு என்று சொல்லவருகிறீர்களா?

நியூட்டன்: அந்தத் தொகுப்பை முப்பட்டகம் முழுமையாகப் பிரித்துவிடுகிறது. ஆப்பிளோ அனைத்து நிறங்களையும் உள்வாங்கிக்கொண்டு சிவப்பை மட்டும் பிரதிபலிக்கிறது.

நிருபர்: இதைச் சரி என்று எப்படி நிரூபிப்பது?

நியூட்டன்: நீல நிற வெளிச்சத்தில் இந்த ஆப்பிள் உங்கள் கண்களுக்குத் தெரியாது.அது எதையும் பிரதிபலிக்காமல் கருநிறத்தில் தெரியும்.

நிருபர்: அந்த ஆப்பிளைக் கொடுங்கள், நான் பரிசோதித்துப் பார்க்கிறேன்.

நியூட்டன்: ஐயோ, எனது ஆப்பிள்…?

நிருபர்: இயக்கம் குறித்த விதிகளை எனக்குப் புரியும்படி விளக்குங்கள். உங்கள் ஆப்பிளைத் தந்துவிடுகிறேன்.

நியூட்டன்: சரி, சொல்கிறேன். ஒரு பொருளின் அசைவுக்குப் பின்னால் இருக்கும் ரகசியங்களை வெளிப்படுத்துவதுதான் எனது மூன்று இயக்க விதிகள். நீங்கள் ஒரு காரில் 100 கிலோ மீட்டர் வேகத்தில் நேராகச் சென்றுகொண்டிருக்கிறீர்கள் என்று வைத்துக் கொள்வோம். உங்கள் கார் எந்தவொரு மாற்றமுமின்றி நேராகச் செல்லும். அப்படிச் செல்லும் காரின் இயக்கத்தில் மாற்றம் ஏற்பட்டால் என்ன அர்த்தம்?

நிருபர்: காரை ஓட்டும் நான் வேகத்தைக் குறைத்துவிட்டேன் அல்லது கூட்டிவிட்டேன்.

நியூட்டன்: அல்லது…

நிருபர்: ஸ்டீயரிங்கை வலது அல்லது இடது பக்கம் திருப்பிவிட்டேன்.

நியூட்டன்: இதுதான் என் இயக்க விதிகளின் மூலக்கரு. எந்தவொரு பொருளின் இயக்கத்தில் மாற்றம் ஏற்பட்டாலும், அந்தப் பொருளின் மீது ஏதோவொரு விசை செயல்படுகிறது என்று அர்த்தம்.

நிருபர்: ஓ! திடீரென்று ஸ்டீயரிங்கைத் திருப்பியதுபோல்…

நியூட்டன்: ஆம்! இந்தத் திடீர் மாற்றத்தின் விளைவு உங்கள் காரின் வேகத்தில் அல்லது செல்லும் திசையில் தெரியும்.

நிருபர்: வேக மாற்றமும் விசையும் ஒன்றோடு ஒன்று தொடர்புடையது என்பதே நீங்கள் கண்டறிந்த உண்மை. இதை அனைவரும் மிகப் பெரிய சாதனை என்று சொல்கிறார்கள்.

நியூட்டன்: நான் மற்றவர்களுக்கு எப்படித் தோன்றுகிறேன் என்று எனக்குத் தெரியாது. ஆனால், என்னை நான் பார்க்கும்போது கடலோரம் விளையாடும் ஒரு குழந்தையைப் போல் தெரிகிறேன். அந்தக் குழந்தை அதிர்ஷ்டவசமாக ஒரு அழகான கிளிஞ்சலைக் கண்டெடுத்தது. ஆனால், அந்தக் குழந்தையின் முன் பரந்த பெருங்கடலாக அறியப்படாத உண்மைகள் விரிந்துகிடக்கின்றன என்பதுதான் உண்மை.

குறிப்பு:

நியூட்டன் பிறந்தபோது வழக்கத்தில் இருந்தது ஜூலியன் நாட்காட்டி முறை.

இதன்படி நியூட்டனின் பிறப்பு: 25-12-1642, இறப்பு: 20-03-1727.

புதிய நாட்காட்டி முறைப்படி (கிரிகோரியன் நாட்காட்டி) பிறப்பு: 04-01-1643, இறப்பு: 31-03-1727

 

– குமரன் வளவன், நாடகக் கலைஞர், இயற்பியலாளர்,
பிரெஞ்சு-தமிழ் மொழிபெயர்ப்பாளர்
தொடர்புக்கு: valavane@yahoo.fr

source:::::The Hindu… Tamil
natarajan

” How Safe Flying Has Become … “

When Malaysian Airlines flight MH370 disappeared without a trace over Southeast Asia sometime Saturday, a persistent question quickly emerged: How could an airliner just vanish? But as the days continue to pass without any sign of the plane, we have been reminded that flight is a complex process that we now frequently take for granted. That’s right, maybe this whole flying through the air in a metal tube with wings thing isn’t as easy or simple as we make it look, and sometimes, albeitextremely rarely, it does go wrong.

From the beginnings of the remarkable achievement of human flight and the mysterious disappearance of American aviator Amelia Earhart, a number of seemingly unbelievable incidents have helped shape how we fly. Some of the following air incidents ultimately made airplane travel safer, but usually only after emphasizing the fact that the skies — and what we do in them — can sometimes be shockingly unpredictable. Perhaps it’s amazing that things almost always go right.
1. A commercial airliner went down over the Atlantic and wasn’t found for five days.

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Crew members of a Brazilian frigate recover debris from Air France flight 447. 

A little after 10 p.m. on May 31, 2009, Air France Flight 447 took off from Rio de Janeiro, Brazil to make its way across the Atlantic to Paris’ Charles de Gaulle International Airportf. The Airbus A330-203 was carrying 216 passengers, as well as 12 crew members. The aircraft was last contacted at 2:10 a.m. on June 1. Five days later, wreckage of the plane finally began showing up in the Atlantic. All aboard were presumed dead and the cause of the crash remained largely undetermined until the plane’s flight data recorder and the cockpit voice recorder were recovered nearly two years later, about two miles under the ocean.

Analysis of the black boxes determined that Air France Flight 447’s autopilot failed and the pilots mistakenly raised the nose of the plane causing it to stall. The pilots were reportedly unaware of the stall and continued pulling up, which resulted in the plane eventually plummeting intact from 38,000 feet, falling at roughly 10,000 feet per minute. Experts concluded that the plane broke apart not in the air but upon impact with the Atlantic Ocean.

2. An American Airlines plane was stolen off a runway in Luanda, Angola and has never been seen again.

northwest airlines flight 255

The stolen American Airlines plane, 14 years prior. 

It was 2003, and Ben Charles Padilla — airline mechanic, flight engineer and private pilot — was in charge of maintenance of a used Boeing 727 American Airlines plane(owned by a Miami airline leasing company), that had been sitting on the runway in Luanda, Angola at Quatro de Fevereiro Airport for a little over a year. On May 25, 2003, the plane inexplicably made its way down the runway, without authorization and with its transponder turned off. The FBI and CIA believe Padilla was at the controls, but reports vary as to how many people were with him upon takeoff. U.S officials suspect the plane was used for illegal activity, such as running drugs, guns or perhaps even crashed for insurance money, but no one is certain. As of today, the plane and Padilla remain missing.
3. An Australian pilot reported a UFO hovering above him mid flight. He and his plane are still missing.

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Single engine Cessna craft similar to that flown by Valentich. 

In October 1978, Frederick Valentich was flying over Melbourne’s Bass Strait when he reported that an aircraft that he could not identify was hovering a thousand feet above him. The flight tower told Valentich they detected no other aircraft in the area. At about 7:12 p.m., Valentich told the tower the object was “hovering and it’s not an aircraft.” This was followed by 17 seconds of unidentified “metal scraping sounds” and then silence. Valentich and his Cessna 182L were never seen again.

Without the wreckage, we’ll never really know what happened, but subsequent reports suggest it is likely that Valentich became disoriented, possibly misjudged his altitude and crashed. Given that the disappearance took place over 30 years ago, and no wreckage has ever been found on land, it leads many to believe that Valentich must have gone down over water, which could conceivably hide a crashed plane indefinitely.
4. The roof of a commercial airliner blew off mid-flight, leaving passengers and crew exposed to the elements. The plane still managed to land safely.

aloha airlines 243

Passengers recover as the exposed cabin of Flight 243 looms in the background. 

On April 28, 1988, Aloha Airlines Flight 243 was carrying passengers from Hilo to Honolulu, Hawaii on a Boeing 737-297 when an explosive decompression caused the roof just outside the cockpit to rupture, leaving a gaping hole through which debris from the aircraft and unsecured items from the cabin were rapidly sucked out. One flight attendant, Clarabelle Lansing, was also ejected from the plane, and her body was never found. She was the lone fatality in the catastrophic incident, which according to the NTSB, was caused by a structural failure in the fuselage due to age and stress on the 19-year-old aircraft. Others had different hypotheses, but following the NTSB’s report, safety inspection and construction standards were changed for this line of commercial airliner.
5. A pilot successfully crash-landed a 737 in the middle of the jungle after flying in the wrong direction upon takeoff.

varig flight

A Varig 737 similar to the one piloted into the Amazon. 

Varig Flight 254 was supposed to be taking a plane full of passengers on the final leg of a flight from São Paulo to Belém, in Brazil, on Sept. 3, 1989. After completing a number of successful stopovers, the crew prepared for the home stretch, a short journey from Marabá to Belém. When the pilot went to input the heading for the final flight, he misread the coordinates, leading him to direct the plane to fly in the opposite direction, into an uninhabited section of the Amazon. The true extent of the mistake went unnoticed until it was too late, as the pilots attempted to find nearby airfields to land in when they couldn’t find the Belém runway. The plane eventually ran out of fuel and the crew was forced to take the aircraft down over an isolated stretch of rainforest.

The impact and ensuing disintegration of the plane led to eight fatalities. Survivors of the crash then hiked out of the jungle to retrieve help for their companions. A total of 13 were killed as a result of the incident.
6. A commercial jetliner went down in the ocean just short of its island destination. Out of 153 people on board, only one survived.

yemenia flight 626

French and Yemeni divers search the Indian Ocean for the wreckage of Yemenia Flight 626. 

Yemenia Flight 626, an Airbus A310-324, crashed into the Indian Ocean off the coast of the small island of Comoros on June 30, 2009. Thirteen hours after the crash, rescuers spotted 14-year-old Bahia Bakari clinging to debris in the ocean. Without a life vest and apparently unable to swim, Bakari was the only survivor of the flight, which also claimed the life of her mother. An investigation of the crash ultimately determined that the plane had gone down due to crew error.
7. The U.S. Navy shot down a commercial jet thinking it was an F-14.

uss vincennes

The U.S.S. Vincennes. 

With the Iran-Iraq war still going strong in 1988, there was still a great deal of uneasiness in the Persian Gulf. Iran Air Flight 655 left from Tehran on its way to Dubai on July 3. Patrolling the Gulf that day was the USS Vincennes, a U.S. Navy guided missile cruiser. The U.S. claims that it attempted to make contact with the aircraft, which did not identify itself, and thus was forced to shoot down the plane using two surface to air missiles, killing all 290 on board.

The U.S. military has stated that it believed the Airbus A300 was actually an F-14 fighter jet, a much smaller and much faster aircraft. The lack of concrete reasoning for firing upon the aircraft, along with its historical opposition to Iran, did not paint the U.S. in a forgiving light. And though it has never admitted fault, the U.S. government paid the families of the deceased $61.8 million in restitution.
8. A plane veered off the runway shortly after takeoff, severing its wing and exploding onto a nearby highway.

northwest airlines flight 255

A flatbed truck hauls the remains of Northwest Airlines flight 255’s two engines. 

Northwest Airlines Flight 255 took off just outside of Detroit on August 16, 1987. The McDonnell Douglas MD-82 departed the runway shakily and veered off in one direction, severing the fuel-filled wing of the plane on a light pole. That ignited the plane as it crashed and broke apart on nearby Interstate 94. A total of 148 passengers and six crew members were killed in the accident. Two people on the ground were also killed. The lone survivor of the flight was a 4-year-old girl named Cecelia Cichan. She lost her mother, father and 6-year-old brother in the incident. It remains thedeadliest sole-survivor crash in the history of aviation.

9. A corporate jet had part of its wing and tail clipped by a commercial airliner — at 37,000 feet.

shocking flights

The Legacy 600 jet with part of its wing and tail clipped. 

New York Times travel writer Joe Sharkey was flying above the Amazon rainforest on September 29, 2006 in what he called an “uneventful and comfortable flight.”Suddenly, the $25 million Embraer Legacy 600 corporate jet he was flying in was hit. By what, no one knew. The passengers could only see that part of a wing was gone. And all this at nearly 40,000 feet in the air, above the Amazon. The pilots, unsuccessful in contacting anybody on the ground, desperately looked for a place to land. Finally, they located a hidden military base and miraculously brought the aircraft down safely.

Sharkey and the other passengers all celebrated and joked about their brush with death, wondering what might have hit them. Then news came. A Brazilian flight went missing right in the area where they had reported the collision. It was carrying 155 passengers. The two aircraft had somehow been traveling at the same altitude in opposite directions, in the same space, each at about 500 miles per hour.

The other craft turned out to be Gol Transportes Aéreos Flight 1907, a Boeing 737 traveling from Manaus, Brazil to Rio De Janeiro. According to crash reports, the Legacy 600’s left winglet (part of the wing that juts vertically off the wing’s tip) had collided with and sliced off nearly half of the Boeing 737’s left wing. This caused Flight 1907 to nose dive from 37,000 feet into an uncontrollable spin, which broke the aircraft apart in midair, sending all passengers and crew members to their death in the jungle below.

___________________________________________________________
All of these incidents were as tragic are they were unusual, which is perhaps why they are so fascinating. Flying in an airplane is seemingly inevitable. The airline industry has made it possible for us to jet coast to coast, continent to continent and everywhere in between, pretty much at the drop of a hat. And while the two million-plus passengers who board more than 30,000 flights every day in the U.S. (and no doubt others around the world) love to complain when things go wrong and flights are delayed or interrupted by crying babies, being involved in something like one of the incidents above seems almost unthinkable.

And that’s not by accident: The airline industry has continued to improve safety standards for both planes and broader flight protocols, ensuring that we almost always get from point A to point B without any real trouble, much less danger. You have a one-in-11 million chance of being killed in an airplane crash, meaning you’re much more likely to be eaten by a shark, or as some airline executives claim, more likely to die in the airport — and certainly while driving there — than on the plane itself.

MORE:

Air FranceAirplane CrashesAloha Airlines Flight 243Northwest Airlines Flight 255Jack Gilbert GrahamJoe Sharkey Legacy 600Frederick ValentichVarig Flight 254Yemenia Flight 626Iran Air Flight 655USS VincennesAirplane IncidentsWorldPost News

source:::: The World Post

natarajan