InDetail

Introduction Missile guidance concerns the method by which the missile receives its commands to move along a certain path to reach a target. On some missiles, these commands are generated internally by the missile computer autopilot. On others, the commands are transmitted to the missile by some external source. The missile sensor or seeker, on the other hand, is a component within a missile that generates data fed into the missile computer. This data is processed by the computer and used to generate guidance commands. Sensor types commonly used today include infrared, radar, and the global positioning system. Based on the relative position between the missile and the target at any given point in flight, the computer autopilot sends commands to the control surfaces to adjust the missile's course. Missiles are the one of the major weapon in the wars. The word missile comes from the Latin verb mittere, meaning "to send". The first missiles to be used operationally we...

GRAPHENE | GRAPHENE TECHNOLOGY | GRAPHENE THE MATERIAL OF THE FUTURE | GRAPHENE REVIEW | GRAPHENE PROPERTIES | GRAPHENE PRODUCTION The graphene is a substance which has a single-layer crystal lattice of carbon atoms, which is unusual since it is different from all of the materials of its kind. Several researchers have identified a way of making this substance, which allows them to use it in various fields and especially for the high-speed electronic devices. Graphene Definition: Graphene is defined as a one atom thin sheet of carbon atoms arranged in a Hexagonal format or a flat monolayer of carbon atoms that are tightly packed into a 2D honeycomb lattice. History: In October 2010, two University of Manchester (U.K.) scientists, Andre Geim and Konstantin Novolselov, were awarded the 2010 Nobel Prize in physics for their research on graphene. Graphene is a one-atom-thick sheet of carbon whose strength, flexibility, and electrical conductivity have opened up new...

अतीत   में   जो कुछ भी हुआ , वह  अच्छे के लिए   हुआ,   जो कुछ   हो रहा है ,  अच्छा हो रहा   है, जो   भविष्य में  होगा ,  अच्छा ही  होगा.  अतीत   के लिए   मत रोओ ,  अपने   वर्तमान जीवन   पर ध्यान केंद्रित करो ,   भविष्य   के लिए   चिंता मत करो   (Whatever happened in the past, it happened for the good; Whatever is happening, is happening for the good; Whatever shall happen in the future, shall happen for the good only. Do not weep for the past, do not worry for the future, concentrate on your present life.) जन्म के समय में   आप क्या   लाए थे जो अब खो दिया है?  आप ने  क्या पैदा किया था  जो नष्ट हो गया है?  जब  आप   पैदा हुए थे,  तब  आप कुछ भी  साथ  नहीं लाए थे.    आपके पास   जो कुछ भी है,    आप  को  इस धरती   पर  भगवान ...

HUMMINGBIRDS VS. HELICOPTERS A quantitative analysis of hummingbird wings shows that they generate lift more efficiently than the best microhelicopter blades. The findings could lead to more powerful, bird-inspired robotic vehicles. More than 42 million years of natural selection have turned hummingbirds into some of the world's most energetically efficient flyers, particularly when it comes to hovering in place. Humans, however, are gaining ground quickly. A new study led by  David Lentink , an assistant professor of  mechanical engineering  at Stanford, reveals that the spinning blades of microhelicopters are about as efficient at hovering as the average hummingbird. The experiment involved spinning hummingbird wings – sourced from a pre-existing museum collection – of 12 different species on an apparatus designed to test the aerodynamics of helicopter blades. The researchers used cameras to visualize airflow around the wings, and sensitive load cells to measu...

The first benefit offered by all forms of CNC machine tools is improved automation. The operator intervention related to producing workpieces can be reduced or eliminated. Many CNC machines can run unattended during their entire machining cycle, freeing the operator to do other tasks. This gives the CNC user several side benefits including reduced operator fatigue, fewer mistakes caused by human error, and consistent and predictable machining time for each workpiece. Since the machine will be running under program control, the skill level required of the CNC operator (related to basic machining practice) is also reduced as compared to a machinist producing workpieces with conventional machine tools. The second major benefit of CNC technology is consistent and accurate workpieces. Today's CNC machines boast almost unbelievable accuracy and repeatibility specifications. This means that once a program is verified, two, ten, or one thousand identical workpieces can be easily produce...