Showing posts from December, 2011

new year images 2012

wish you a happy new year to all the human being in the world and in space stations SUPPPORT THE GREEN LIFE AND SAVE THE BLUE PLANET 'THE EARTH'

Technical files

*presentations and documents for the Mechanical* 3d_machine_vision_systems   [DOC] a_web_based_manufacturing_service_system_for_rapid_product_development  [PPT] adaptive_control_system   [DOC] air_brake_system   [DOC] air-muscle   [DOC] automatic_speed_control_system   [DOC] bending_load_capacity_enhancement_using_asymmetric_tooth_profile   [PPT] composites_materials [ DOC] di_diesel_engine   [DOC] emulsified_ethanol   [DOC] fuel_cells   [DOC] liquid_nitrogen   [DOC] mechanical_design   [PPT] mechanical_properties_i   [PPT mechanical-working-of-metals   [PPT] mechanics_of_metal_cutting   [PPT] metallurgical_changes_in_steels_   [DOC] microelectromechanical_systems   [DOC] nanotechnology_and_prototyping   [DOC] nanotechnology_new   [DOC] nanotechnology_perfecting_the_future   [DOC] nd_evaluation_of_composite_pressure_vessels_using_fbg_sensors [PPT] neural_networks   [DOC] six_sigma [ DOC] tidal_power   [DOC] vehicle_dynamics   [DOC] 

History of Planes

HISTORY OF AIRPLANES: Before the Wright Brothers created the first flying Airplane able to carry a human, there were those who inspired the idea. If not for their ideas and experiments perhaps airplanes as we know it today might not of been. The first ideas of the perfect airplane were the flapping-wing machines, called ornithopters. The Ornithopter is where the wings are providing both the lift and thrust. Apart from ornithopters three devices important to aviation had been invented in Europe in the Middle Ages and had reached a high stage. 1799-1809 Between 1799 and 1809 Sir George Cayley who was an English Baronet came up with the concept of the modern airplane. At this time Cayley had abandoned the ornithopters tradition. He designed airplanes with rigid wings to provide lift, and separate propelling devices to provide trust. Cayley laid the foundations of aerodynamics through his published works. He showed both with models and full-size flight control by means of a single rudde

Aircraft Engine

Aircraft Engine More PowerPoint presentations from jesudas

Milky Way or Galaxy

  Milky Way or Galaxy  The Milky Way or Galaxy with a capital G, is the name given to our galaxy. Aged 12 billion years, it has been there since the beginning of the universe. Our galaxy contains a set of 200 billion stars and probably a huge amount of dark matter. Together by their gravitational forces.  Galaxies are of three types: elliptical, spiral, irregular. The Milky Way is a spiral. The Hubble Space Telescope regularly sends pictures which show the diversity of galaxies.  Our city is really huge star. This is a huge spiral of stars wheel with a diameter of approximately 100 000 light years. Light takes 100 000 years to cross the Milky Way. It appears that the Earth is a continuous white band of the Milky Way.  Our galaxy is composed of three spiral arms (Sagittarius arm, the arm of Orion and Perseus arm). Its mass is 10 11  kg or 2x10 41  solar masses.  The center of our galaxy is occupied by a black hole, as many galaxies.  The Large and Small Magellanic Cloud gala


BLACK HOLE Black hole is one of the most enigmatic and mysterious objects in the universe. It cannot be seen even with most powerful of telescopes. No object can escape once it falls into a black hole. Even light is held in its grip. Space is highly curved and time moves extremely slowly close to a black hole. Apparently, a black hole is a region of greatly distorted space [and also time]. A black hole, once create, is like a bottom precipice that cannot be filled in or ‘plugged’ with anything. They are almost perpetual holes in space time. They grow at the expense of matter falling into them. Even when no matter fall into black hole, it may stay in the same state for trillions of years. What are black holes? Have you ever had to vacuum your bed room? When you do so, watch closely because you will see dirt, and crumbs start to move towards the vacuum cleaner, cleaning up derbies left behind in outer space.  It is not suction power that makes thing fall into a black hole. Suction


NO TOOTHACHE From time immemorial, oral hygiene has always been an integral parts of body care. Although considered to be the hardest substance in the human body, the tooth is frequently associated with pain. One of the primary causes of dental pain is Dental Caries or tooth decay. The incidence of caries has greatly increased due to a change in dietary patterns like increase in surgery foods and carbonated drinks. Poor oral hygiene is seen as a contributing factor. Bacterial accumulation leads to acid production there b causing loss of tooth structure and pain. Another area of significance is the supporting gum tissue. A good tooth gum relationship ensures better health.  Factor such as smoking, poor oral hygiene, nutritional deficiencies and systemic factors cause the breakdown of the attachment. The bone and gum support reduces leading to tooth mobility and finally loss of the tooth. Toothache can be minimized greatly if certain guidelines are followed to ensure good oral hea


FIRE DESTROYS LIFE Every year thousands of people lose their lives in fire is very important to take steps to prevent fire in our homes as well as institutional premises. Following are some safety tips to make your house a safe home: 1.        Fit smoke alarms on each level in your home. Keep them free from dust and test them once a week. Consider buying a 10 years alarm; otherwise change the batteries in your alarm every year. 2.        Make a fire action plan so that everyone in your home knows how to escape if there is a fire. 3.        Keep the exits from your home clear so that people can escape if there is a fire. Make sure that every in your home can easily find keys for doors and windows. 4.        Take extra care in the kitchen accidents while cooking account for over half of fires in homes. Never leave young children alone in kitchen. 5.        Take extra care when cooking with hot oil. Consider buying a deep fat fryer which is controlled by a thermostat [if y