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MATLAB : Fourier transform

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By Nuno Nogueira, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=3912826 MATLAB has been  crucial programming language across worldwide that let us express matrix and array mathematics directly. In signal processing and communication it plays vital role in analysing and exploring time series data in time domain or frequency domain. For analysing non periodic signals in frequency domain we use Fourier transform instead of Fourier series ,which is used to express periodic signals in terms of infinite sum of sinusoidal terms .   Fourier transform can exist for :      1. Energy signals      2. Power signals       3. Impulse signals  That means absolutely integrable signals can have their Fourier transform only.  Formula for Fourier transform;   Then its come to use Fourier transform in MATLAB. So here is the code for Fourier transform of sinusoidal wave , for any other signal we ...

Top 5 building innovations for civil engineers

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With the introduction of smart and more energy-efficient housing, the need is there for construction to get smarter and more efficient too. With more innovative tools and techniques appearing all the time, here are five industry-changing examples of the new technology used in civil engineering today. Self-healing concrete Cement is one of the major construction material, but also one of the largest contributor to harmful carbon emissions.  Cracking is a major problem in construction, usually caused by exposure to water and chemicals. Researchers at Bath University are looking to develop a self-healing concrete, using a mix containing bacteria within microcapsules, which will aid building innovation by germinating when water enters a crack in the concrete to produce limestone, plugging the crack before water and oxygen has a chance to corrode the steel reinforcement. Photovoltaic glaze One of the most exciting new technologies used in civil engineering is building integrated p...

Memristor : brain-on-a-chip

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In the field of AI, researchers are working on devices having their own memory and ability of thinking, they are trying to mimic the human brain. The human brain is the most complicated structure consisting of millions of neurons that are interlinked by a thread-like structure called synapses. The engineers from the Massachusetts Institute of Technology have designed 'brain-on -a-chip'. The chip is smaller than a piece of confetti, that is about 1 mm in dimension and made from thousands of artificial brain synapses known as Memristors. Memristors are the silicon-based component that mimics the information-transmitting synapses in the human brain. Memristors or memory resistors are the necessary elements of neuromorphic computing. In a neuromorphic device, memristors would work more similar to a brain synapse. The synapse receives signals from one neuron, in the form of ions, and sends a corresponding signal to the next neuron. Like a brain synapse, a memristor would also be...

Chandrayaan : A glorious legacy

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In series of posts celebrating the success of ISRO, this is our third post and in this, we are going to remember a milestone of ISRO's journey, Chandrayaan-1.                                                                                                                      pic by:- Universe today Chandrayaan -1 was India's first mission to the moon. It was launched by ISRO in October 2008 and it was active until August 2009. The mission was a significant uplift to India's space program as most of the technologies used were developed in India. This mission is well known for the discovery of evidence of water molecules on the moon. MISSION HISTORY & OBJECTIVE The word...