PK Tech

 Light Pollution Introduction Light is also called photo pollution or luminescence pollution refers to a brightening of night sky due to scattering of artificial light by gaseous molecule and dust particle in the air. Light pollution Sky glow Glare Light trespass Light clutter Sky glow Most of the times the lightning are not endowed with adequate shielding provisions as a result the light is reflected by the object it illuminates and spills away into the sky. In the atmosphere it is reflected causing orange color sky glow refers to the glow effect that can be seen over populated areas. Light trespass Light may go across property lines and illuminates some one else premises. This condition is called light trespass. This is not only a nuisance bus also a security risk. A common light trespass problem occur when a beam if light from one house enters a windows of another house. This may lead to sleep deprivaion or blocking of a evening view. Glare The condition of glare result when more

 Advantage & Disadvantage  Computer Computer  C-Common O-Operating M-Machine P-Particularly U-Used For T-Training  E-Education R-Research What is computer ? Computer is an electronic device Which takes input from the user and give the output after processing. Characteristics Speed Accuracy  Diligence  Versatility Reliable  Large storage capacity  ADVANTAGES E-mail Allow peoples across the world to communicate with each other, by using E-mail. Connection with Internet With the internet we can communication with people faster throughout the globe. We can send  email, hold voice & video calls, use IM service. Also allows for instant sharing of files, we can also connect with our family, friends, and with our relatives. Backup & Recovery User can backup copies of work easily, without having to rewrite everything. And at any time it can be recovery Education  Allows creation of a wider variety of individualized and differentiated lessons. DISADVANTAGES Health Risks  Prolonged us

 Human Capital Capital Cash or goods used to generate income either by investing in a business or a different income property. The money, property, and other valuables which collectively represent the wealth of an individual or business. Human Capital Human capital is the attributes of a person that are productive in some economic context. Human capital is the stock of competencies, knowledge, social and personality attributes, including creativity, embodied in the ability to perform labor so as to produce economics value. Human Capital Development Human capital development is the act of increasing the productive qualities of labor forces by providing more education and by increasing skill, health and nutrition level. If the people of a country are well educated, well nourished, skillied and healthy that will be said to have more human capital. Types of Human Capital Biological capital Knowledge capital Track record capital Social capital Factors of Human Capital Development Importing

Road Safety  What is road Safety? Road safety refers to methods and measures for reducing the risk of a person using the road network for being killed or seriously injured. The users of a road include pedestrians, cyclists,  motorists, etc. Do you know? More than 1.2 million people are killed in road accidents, world wide, every year. One child is killed in Road Accidents, every three minutes in the World. 3-4% of Gross National Product is lost in Road accidents. Road Accidents Photos Why these accidents are happening? Over Speeding Drunken Driving Distraction to Driver Red light jumping Avoiding Safety Gears like Helmets Unawareness Of road rules, regulation and signs Prevention of road accidents TV and Other media should be effectively used for public safety awareness. Major accidents and accident prone areas should be scientifically analyzed. License of those who make accidents should be cancelled. Zebra crossing should be provided for pedestrians for safe road crossing at appro

 Solar System Sun  Located  93,000,000 from the earth  Closest star to earth   At least 4.5 billion years old   Has a surface temperature of 10,000 degrees and a center temperature of 27,000,000 degrees Fahrenheit Moon Bigger than pluto Only object in the solar system visited by humans A lunar months is 29.35 days; 1 new moon to the next. The moon’s gravitational pull on earth is the main cause of the ocean’s tide. Asteroids   The asteroids belt is the space between mars and jupiter It contains irregularly shaped chunks of debris called asteroids Asteroids made of rock and metal. Mostly nickel and iron. Planets  Mercury  Venus  Earth   Mars  Jupiter  Saturn   Uranus   Neptune  Mercury Closest to the sun Smallest planet Rotates once every 59 earth days One day on Mercury lasts 176 earth days Very dry, hot and almost airless Venus   Second closest planet to the sun Brightest celestial body besides the moon and sun Cannot be seen in the middle of the night  Can be observed in the east a

 Robotics What is a Robot ?? A re-programmable, multifunction, automatic industrial machine designed to replace human in hazardous work. It can be used as : An automatic machine sweeper  An automatic car for a child to play with  It is also used as in space, military, and many more.  What is Robotics need ? Robotics is science of designing or building an application of robots. Simply, Robotics may be defines as “The study of Robots”. The aim of robotics is to design an efficient robot. Why is robotics needed ?? Robotics is needed because: Speed Can work in hazardous\dangerous temperatures Can do repetitive task Can work with accuracy Robotic History First use of the word “robotics” Three laws of Robotics The first robot “unimate” First use of the word “robotics” The word “robotics”, used to describe this field of study, was coined accidentally by the Russian-born, American scientist and science fiction writer, Isaac Asimov(1920-1992) in 1940s. Three Laws of Robotics First law : A r