PPT-Chapter # 3 Data and Signals

Introduction One of the major functions of physical layer is to move data in the form of electromagnetic signals across a transmission medium Thus the data must be transformed to electromagnetic signals to be transmitted. In this lecture we discuss these signals and then proceed to a discussion of sys tems first in general and then in terms of various classes of systems defined by specific system properties The unit step both for continuous and discrete time is zero Antti Meriläinen, Edward . Hæggström. Using high frequency acoustic waves for mm-/µm-scale imaging. Method is non-destructive. It “Sees” inside the sample. Ultrasound images differences of acoustic impedances. High Frequency Trading Using Regime Switching Strategy. Huynh . Gia. . Huy. (G1000176L). Le Hoang Thai (G1000293G). Reference. “Developing High-Frequency Equities Trading Models”, Leandro Rafael . Examples of signals:. Voltage output of a RLC circuit, stock market, ECG, speech, sequences of bases in a gene, MRI or CT scan. Examples of systems:. RLC circuit, an algorithm for predicting future of stock market, an algorithm for detecting abnormal heart rhythms, speech understanding systems, edge detection algorithm for medical images.. Molecular Structure. by Nuclear Magnetic Resonance (NMR). 2. Nuclear Magnetic Resonance Spectroscopy exploits a property called Nuclear Spin. Any atomic nucleus that has an odd mass, an odd atomic number, or both is a nucleus . Analog and Digital. Analog and Digital Data & Signals. Periodic & Aperiodic Signals. Contents. Information can be voice, image, numeric data, characters or any message that is readable and has meaning to the destination . Testbed. Jeremy . Bergan. , Ben Green, Alex Lee. Network Coding Overview.  Our project goal is to implement a Network Coding . Testbed. To be used by researchers in the future. Ability to test different networking schemes . Dr. Leonid Perlovsky. Northeastern . University, lperl@rcn.com. Tutorial, IJCNN 2015. 12 July 2015. OUTLINE. The fundamental principles . of the mind-brain . The mind is more powerful than standard algorithms. COMMUNICATION IS AND WAS AN ESSENTIAL AID BETWEEN SHIPS ,AND SHIPS AND SHORE STATIONS.. AT THE BEGINNING OF 19° CENTURY THERE WAS A HUGE INCREASE IN MARITIME TRAFFIC DUE TO THE INVENTION OF STEAM POWER,APPLIED TO SHIP PROPULSION.. Nyquist. Theorem . Richa. Sharma. Dept. of Physics And Astrophysics. University of Delhi. Signal : . Any physical quantity that varies with time, space, or any other independent variable or variables.. Showcasing work by N. Morizet, N.Godin, J.Tang, E.Maillet, M.Fregonese, and B.Normand on "Classification of Acoustic Emission Signals Using Wavelets. and Random Forests: Application to localized corrosion".. Instructor: . Dr. Ghazi Al Sukkar. Dept. of Electrical Engineering. The . University of Jordan. Email: . ghazi.alsukkar@ju.edu.jo. 1. Fall 2014. 2. Course Details. Objective. Establish a background in Signal and System Analysis. Presented by. Jodi K. . Haponski. (GSSP Summer Program). Mentors. Radina P. Soebiyanto (USRA/NASA). Richard K. Kiang(NASA). Background. Most common disease. Annually Infects 5-15% of global population. Carrier . is strong and stable sinusoidal signal . x(t) = A cos(. w. c . t + . q. ). Carrier transports . information. (audio, video, text, email) across the world. Why is the carrier required?. Audio and video signals cannot travel over large distances since they are weak.