Monday, 19 September 2011

activity: CYCLING

The bicycle, bike or cycle is a human-powered vehicle that is driven by foot pedals. It has a basic frame with two wheels attached to it, one after the other. Almost 1.4 billion people in the world use this vehicle, and is obviously one of the most popular and cost-effective vehicles in use today. Not only is it an important and popular means of transport, but also an effective recreational tool. It has several uses such as police and military applications, courier services and cycling sports as well as adult fitness equipment.

Introduced in the 19th century in Europe, bicycle has a host of innovators and inventors credited to its name. The bicycle is supposed to originate from the human-powered vehicle called Draisines. This was introduced to the people in Paris in 1818 by German Baron Karl von Drais. Kirkpatrick MacMillan made an upgrade to this vehicle by adding a mechanical crank drive that as used to drive the vehicle. Thus, the modern `bicycle` came into being.

The French inventors Pierre Michaux and Pierre Lallement designed a high-seated and big front-wheeled bicycle (ordinary bicycle, as it was formally called) that wasn`t much preferred as of its bad weight distribution. The dwarf ordinary bicycle mended these faults but the front oversized wheel remained a problem to be solved. J.K. Starley`s 1885 Rover was the first modern bicycle in its true sense with even wheels and a proper seat.

The modern bicycle has many parts. They may be jotted down as follows.

Frame - Every bicycle today has a `diamond` frame, where the front triangle consists of the head tube, top tube, down tube and seat tube. The rear triangle consists of the seat tube and chain stays as well as seat stays. The basic of bicycle frames is to have high strength yet low weight so as to optimize the energy of the rider to the fullest. Women`s bicycles generally have a step-through frame. This defines that the top tube is absent as it allows the rider (usually a woman) to mount and dismount in a dignified way while wearing a skirt or dress.

Drivetrain - The pedals which rotate the arms of the mechanical crank and chain rings and the brackets, all are elements of the drivetrain. They are used for gears and other related functions in the bicycle.

Handlebars - The handlebars are one of the most important parts of a bicycle. Upright handlebars are used in normal bicycles while dropped handlebars are used in racing and mountaineering bicycles. The latter are used because they give aerodynamic steering and speed to the biker.

Saddles - The saddles are varying depending on the journey and preference of the rider. Cushioned ones are usually used for short journeys while narrower ones are meant to give more space for leg swings.

Brakes - Modern bicycle brakes are usually rim brakes that use friction pads to de-intensify speed. There are also internal hub brakes that have friction pads within the hubs that halt a speeding bicycle. Disc brakes are used on mountain, racing etc bicycles that need braking to be immediate and accurate.

Suspension - A bicycle has suspension to guard itself from the hard roads and also provide comfort to the rider who has to face the rough road.

Wheels - Wheels are necessary for a bicycle to run and reach its destination. Sizes, shapes and powerful wheels vary as per the rider`s needs and choice.

place: MOUNT KILIMANJARO


This dramatic image of Kilimanjaro was made from data acquired from the Shuttle Radar Topography Mission (SRTM and a Landsat 7 image (both in February 2000). The sky was added. This clearly shows the topography (shape and form) of the mountain, but the vertical scale has been expanded to twice its true height. The view represents a width across of 77 miles, from about 100 miles away.

place: MOUNT KILIMANJARO

KILIMANJARO SATELLITE IMAGES

Mount Kilimanjaro (Swahili meaning is 'shining mountain'), is the continent&s most famous mountain. It is Africa&s highest point above sea level, rising to 19,340 feet. Being so high, it has a permanent ice cap of glaciers on its southern and southwestern flanks, even though it is close to the equator. It is the only place in Africa where ice and snow persist year-round. The ice cap has diminished significantly in recent years, most likely due to global warming. Scientists estimate that by 2015 the glaciers will no longer exist.

It is the largest and highest free-standing mountain (not part of a range) in the world, but was not always so. Kilimanjaro is a volcano comprised of three peaks that merged together. The last eruption was perhaps more than 100,000 years ago but volcanic gases are still vented. Hot magma may be present less than 1,000 feet below the surface of the summit plain (Reusch Crater) It is surrounded by about 20 other volcanoes, mostly to the west. Most prominent is Mount Meru. Kilimanjaro&s slopes support a wide range of flora, from dense rain forests to unique afromontane communities. Its isolation has led to the evolution of many unique species of plants and animals. These are increasingly threatened by human encroachment of unprotected areas. Lower down, in the mountainĂ•s shadow, dry savanna grasslands of the plains support a range of African wildlife. 


This astonishing image of Kilimanjaro was taken February 2000 from the Landsat 7 satellite. The three main peaks of the mountain are to the right of the picture, whereas the complex of smaller volcanoes is evident to the west (left of picture). The prominent mountain to the center is Mount Meru. Arusha National Park (Tanzania) is visible to the south of Kilimanjaro, while Amboseli National Park (Kenya) protects the northern half. The colors result from computer enhancement of image data using shortwave infrared, infrared, and green wavelengths.


place: MOUNT KILIMANJARO

taking a different look at the mountain:
view from space




place: MOUNT KILIMANJARO








place: MOUNT KILIMANJARO

Elevation: 19,340 feet (5,895 meters)
Location: Tanzania, east Africa
First Ascent: Hans Meyer (Germany), Yoanas Kinyala Lauwo (Tanzania), and Ludwig Purtscheller (Austria) on October 5, 1889.

Fast Facts:

  • The meaning and origin of the name Kilimanjaro is unknown. It is thought to be a combination of the Swahili word Kilima, meaning “mountain,” and the KiChagga word Njaro, loosely translated as “whiteness,” giving the name White Mountain. The name Kibo in KiChagga means “spotted” and refers to rocks seen on snowfields. The name Uhuru translates as “freedom,” a name given to commemorate Tanzanian independence from Great Britain in 1961.

  • Kilimanjaro, the highest mountain in Africa and fourth highest of the Seven Summits, is considered the tallest freestanding mountain in the world, rising 15,100 feet (4,600 meters) from base to summit.

  • Kilimanjaro is composed of three distinct volcanic cones: Kibo 19,340 feet (5,895 meters); Mawenzi 16,896 feet (5,149 meters); and Shira 13,000 feet (3,962 meters). Uhuru Peak is the highest summit on Kibo’s crater rim.

  • Kilimanjaro is a giant stratovolcano that began forming a million years ago when lava spilled from the Rift Valley zone. The mountain was built by successive lava flows. Two of its three peaks—Mawenzi and Shira—are extinct while Kibo, the highest peak is dormant and could erupt again. The last major eruption was 360,000 years ago, while the most recent activity was only 200 years ago.

  • Kilimanjaro has 2.2 square kilometers of glacial ice and is losing it quickly due to global warming. The glaciers have shrunk 82% since 1912 and declined 33% since 1989. It may be ice free within 20 years, dramatically affecting local drinking water, crop irrigation, and hydroelectric power.

  • Kilimanjaro lies within the 756-square-kilometer Kilimanjaro National Park, a UNESCO World Heritage Site, and is one of the few places on earth that encompasses every ecological life zone including tropical jungle, savannah, and desert to montane forests, subalpine plants, and the alpine zone above timberline.

  • Kilimanjaro was first climbed on October 5, 1889 by German geologist Hans Meyer, Marangu scout Yoanas Kinyala Lauwo, and Austrian Ludwig Purtscheller. After reaching the summit, Meyer later wrote that they gave “three ringing cheers, and in virtue of my right as its first discoverer christened this hitherto unknown—the loftiest spot in Africa and the German Empire—Kaiser Wilhelm’s Peak.”

  • Kilimanjaro has five common routes to its highest summit: Marangu Route; Machame Route; Rongai Route; Lemosho Route; and Mweka Route. Machame and Lemosho routes are popular and scenic. Marangu is easiest and busy although the last ascent to the crater rim is difficult.

  • Climbing Kilimanjaro is easy and requires no technical climbing or mountaineering experience. The biggest challenge and danger is the high altitude. Climbers die from improper acclimatization and altitude sickness rather than falls.

  • Kilimanjaro is not a peak you can climb on your own. It is mandatory to climb with a licensed guide and have porters carry your equipment. This sustains the local economy and allows local people to reap the rewards of tourism.

  • The fastest verified ascent time was by Italian Bruno Brunod in 2001. He climbed Uhuru Peak from Marangu Gate in 5 hours, 38 minutes, and 40 seconds. The fastest round-trip time was by local guide Simon Mtuy who ran up and down on December 26, 2004 in 8 hours and 27 minutes.

  • Mount Meru, a 14,980-foot volcanic cone, lies 45 miles west of Kilimanjaro. It is an active volcano; has a snowcap; lies in Arusha National Park; and is often climbed as a training peak for Kilimanjaro.

object: THE MOON

I managed to capture these images on a clear night using our telescope: