AC/DC

Since the industrial revolution, people’s life quality has improved dramatically, along with new machines invented and new technology innovated. While people are enjoying their life with those advancements, energy consumption has also increased enormously. With limited resources on earth, the development of renewable technology has become the focus for the past decades. The sun, the giant burning star that is 92 million miles away from us, is warming us the earth and providing us with light and…

limit of an OFDM system is given as: b/s/Hz Where B is the Band width of the system In OFDMA by the consideration of the cyclic prefix overhead, the capacity of an OFDM system is modified as: b/s/Hz Where Ds is the OFDM symbol duration and Dc is the cyclic prefix duration. Then capacity of OFDMA system b/s/Hz (4) III. AIR INTERFACE CAPACITY AND SIGNAL DEGRADATION IN OFDMA A. Air interference capacity of OFDMA system The air interface capacity of an OFDMA system…

With the rapid growth of industry & trade in big cities and urban areas as well as with increasing the development of infrastructure projects in railway transportation, hence increasing the need for transportation equipment for people . According to long-term development planning of the Republic of Indonesia, urban railway transportation infrastructure build in many places , some of those projects are, APMS (Automatic People Mover System) project at the Soekarno-Hatta Airport, MRT (Mass…

Buckle your seat belts boys and girls, professor or whoever may be reading this at this spectacular time in your life because in five short pages I am going to teach you a thing that I only know the basics on since 9th grade and the rest I learned in a matter of a few hours ago. So sit down, shut up, and enjoy the experience of my 3AM-Monster Energy-ADHD-Medicine Induced-Self Hatred-Fuelled-Writing-Extravaganza about under water welding and what you’re going to read is the dang near the best…

Global warming is one of the biggest threats in the future to the planet we live on. We are starting to see the effects of global warming around us today, but it is nothing compared to what is to come if we don’t start taking care of the planet now. According to alternative energy organization, the world produces carbon dioxide that is release to the earth’s atmosphere everyday. The carbon dioxide that is released increases the warmth of our planet which is causing “Global Warming”…

that, they all have power electronic control that comes with electronic commutation and none of them has windings in the rotor. The mode of operation is what differentiates the three motors. The permanent magnet operates on the basis of the AC motor principle with DC machine characteristics while the reluctance motor operates…

LED gaining popularity in decorative and entertainment lighting The increased popularity of the energy efficient technologies and green energy has led to a surge in demand for latest LED innovations across various sectors including hospitality, retail and entertainment among others. A longer life, brighter illumination and less electricity consumption are some of the reasons why LED is being chosen above others. Entertainment and furnishing markets are also trying to make the most out of the…

Chapter-4 (Introduction to FEM Analysis using COMSOL MULTIPHYSICS) 4.1 Introduction: In simplest form we can define Micro Electro Mechanical Systems (MEMS) as miniaturized electro-mechanical devices made by using various techniques of micro-fabrication, where the dimensions can be in the range from less than one micron to several millimeters. Many MEMS devices are of the size of a grain or the eye of a needle. MEMS is indeed one of the most promising and emerging areas of engineering. This…

When you hear the name Australia, what do you think of? Do you think of animals like kangaroos and koalas? Do you possibly think of famous landmarks like the Sydney Opera House or famous people like Steve Irwin and the band AC/DC? The country of Australia is not just big cities, Sydney and Melbourne. In his book In a Sunburned Country, Bill Bryson shows the many forms of diversity in both the people who live there and the fauna of the country, which he explains using his humor. There are also…

When Thriller was first released, listeners could only expect greatness considering Michael Jackson’s prior experience in the music industry. Ever since he started singing at the age of just 5 years old, Jackson had stunned the world with his musical and performing skills. It is certainly an understatement to say this guy had already had some success in the industry before releasing Thriller. Coming off of his hugely-successful album, Off the Wall in 1980, he certainly had high expectations to…