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Publisher
PBS
Language
English
Description
On November 25th, 1915, Einstein published his greatest work: general relativity. The theory transformed our understanding of nature's laws and the entire history of the cosmos, reaching back to the origin of time itself. Now, in celebration of the 100th anniversary of Einstein's achievement, NOVA tells the inside story of Einstein's masterpiece. The story begins with the intuitive thought experiments that set Einstein off on his quest and traces...
Author
Language
English
Description
"March 1919. Far-flung Korean patriots establish the Korean Provisional Government to protest the Japanese occupation of their country. This government-in-exile proves mostly symbolic, its petitions ignored by heads of state as Korea's nationhood is erased. After Japan's defeat in World War II, the KPG dissolves and civil war erupts, resulting in the North-South split that remains today. But what if the KPG still existed now, today-working toward...
Publisher
The Great Courses
Language
English
Description
Since 2006, the number of landlines has decreased, while the quantity of mobile phones and other communication devices now outnumber the entire human population. Explore how engineers have created the cellular systems required to manage large numbers of calls at once, even as the user moves from place to place.
Publisher
The Great Courses
Language
English
Description
No matter what source is used to generate electricity, that power must be distributed and managed to provide continuous and reliable energy for the end user. Explore the US power grid-much of which has been in place for more than 50 years-and discover the significant benefits a "smart grid" would bring.
Publisher
The Great Courses
Language
English
Description
With the technological development of sensors, feedback control, Bluetooth, and machine learning, we can now network not just computers, but "things" as well. Discover the enormous advantages this "Internet of Things" can provide-from health care to transportation to manufacturing-if we can adequately address the significant concerns regarding privacy and security.
Publisher
The Great Courses
Language
English
Description
Explore the electronics in a typical home through this episode's virtual scavenger hunt. Watch while Dr. Bottomley takes apart a hair dryer, a CD player, a computer CPU, and other machines. You'll learn about the many electronic components you'll find inside-resistors, capacitors, inductors, transistors, integrated circuits, electro-mechanical switches, and more.
Publisher
The Great Courses
Language
English
Description
Explore the earliest electronic computers, including Charles Babbage's Analytical Engine. Although Babbage was not able to completely build it out before his death, his "engine" was based on the same four components that define computers today-input device, some type of memory to store data and temporary calculations, a calculating processor, and an output device.
Publisher
The Great Courses
Language
English
Description
With the advent of logic gates that could be assembled to perform mathematical or logical calculations, engineers could build up from very simple transistors and diodes to a powerful graphic calculator or complex system of facial recognition. Learn about why the numerical basis for logic gates is binary, and how they can be combined to form logic gate circuits.
Publisher
The Great Courses
Language
English
Description
Discover the four revolutions in electrical engineering that have brought major opportunities and benefits to masses of people in just the past 150 years. Learn, specifically, what each of the four periods brought and the basic properties of the electron and electric circuits on which our entire electrified world is based.
Publisher
The Great Courses
Language
English
Description
While sound is not part of the electromagnetic spectrum, it can be manipulated, generated, and shaped by electric circuits. Explore what the signalscope output can tell you about the makeup of various sounds, from a single tone to the human voice to piano chords, and how these can be manipulated by circuits to synthesize entirely new sounds.
Publisher
The Great Courses
Language
English
Description
Explore cybernetics, systems that use information and feedback to control an output that has some type of goal, with feedback present. Discover the various parts of several cybernetic systems: your car's cruise control, an implantable insulin delivery pump, and a vending machine-three completely different control systems that all function with the same principles of cybernetics.
Publisher
The Great Courses
Language
English
Description
How do we create the massive amounts of energy needed to power our cities and individual homes? We don't. Energy can neither be created nor destroyed, only converted from one form to another. Learn how electrical engineers use Maxwell's foundational equations-via four revealing demonstrations-to create generators to power our grids.
Publisher
The Great Courses
Language
English
Description
The entire communication system between our brain and each of our senses is electrochemical, with each of our senses acting as a sensor that emits electrochemical outputs. Learn how this aspect of the body opens the door to electrical engineering solutions for medical problems-from cochlear implants to heart pacemakers to defibrillators.
Publisher
The Great Courses
Language
English
Description
When the Soviet Union launched Sputnik I in 1957, the space race was on. A US satellite was launched 14 months later and it demonstrated the feasibility of two-way satellite communications. Since then, electronic communications have become part of our daily lives. Follow the fascinating story that has led to the need for us to track almost 10,000 active satellites.
Publisher
The Great Courses
Language
English
Description
In the old-style analog telephone system, voltage increased and decreased across the wires, corresponding to the human voice signal. But in a digital system, that all changes. Learn how the human voice is changed into binary values, sent over the system, and then converted back into volts with the voltage applied to the speaker in the phone handset. The human ear takes it from there.
Publisher
The Great Courses
Language
English
Description
When people first realized that electricity could be controlled, it was the beginning of an explosion of opportunity, eventually leading to electronic circuits-circuits that can control other circuits. Learn why just two laws, Ohm's law and the conservation of energy, provide all the information and relationships needed to design circuits.
Publisher
The Great Courses
Language
English
Description
Dr. Bottomley takes you on a virtual vacation to Rwanda to highlight myriad examples of electrical engineering all around the world. From your garage door opener to airport security, the technologies developed by electrical engineers are all around you before you even board the plane. But it's the electronics you'll find in an isolated game park that might really surprise you.
Publisher
The Great Courses
Language
English
Description
Electronic sensors-instruments that detect some type of physical quantity-have been around for more than 130 years, ever since the invention of the electric thermostat. Explore today's proliferation of sensors all around us and discover their basic similarities as they convert signals into electrical quantities that can be used to take action.
Publisher
The Great Courses
Language
English
Description
The development of the transistor was motivated by the need for a device that could amplify signals. How batteries could convert chemical energy to electrical energy was also developed. Learn how the emergence of these two technologies have allowed us to move from electric circuits to electronic circuits, in which one circuit controls another.
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