This course provides an introduction to the design of feedback systems. Topics …
This course provides an introduction to the design of feedback systems. Topics covered include: properties and advantages of feedback systems, time-domain and frequency-domain performance measures, stability and degree of stability, root locus method, Nyquist criterion, frequency-domain design, compensation techniques, application to a wide variety of physical systems, internal and external compensation of operational amplifiers, modeling and compensation of power converter systems, and phase lock loops.
All of us have felt sick at some point in our lives. …
All of us have felt sick at some point in our lives. Many times, we find ourselves asking, "What is the quickest way that I can start to feel better?" During this two-lesson unit, students study that question and determine which form of medicine delivery (pill, liquid, injection/shot) offers the fastest relief. This challenge question serves as a real-world context for learning all about flow rates. Students study how long various prescription methods take to introduce chemicals into our blood streams, as well as use flow rate to determine how increasing a person's heart rate can theoretically make medicines work more quickly. Students are introduced to engineering devices that simulate what occurs during the distribution of antibiotic cells in the body.
Working individually or in groups, students explore the concept of stress (compression) …
Working individually or in groups, students explore the concept of stress (compression) through physical experience and math. They discover why it hurts more to poke themselves with mechanical pencil lead than with an eraser. Then they prove why this is so by using the basic equation for stress and applying the concepts to real engineering problems.
Students develop and solidify their understanding of the concept of "perimeter" as …
Students develop and solidify their understanding of the concept of "perimeter" as they engage in a portion of the civil engineering task of land surveying. Specifically, they measure and calculate the perimeter of a fenced in area of "farmland," and see that this length is equivalent to the minimum required length of a fence to enclose it. Doing this for variously shaped areas confirms that the perimeter is the minimal length of fence required to enclose those shapes. Then students use the technology of a LEGO MINDSTORMS(TM) NXT robot to automate this task. After measuring the perimeter (and thus required fence length) of the "farmland," students see the NXT robot travel around this length, just as a surveyor might travel around an area during the course of surveying land or measuring for fence materials. While practicing their problem solving and measurement skills, students learn and reinforce their scientific and geometric vocabulary.
Using the LEGO® NXT robotics kit, students construct and program robots to …
Using the LEGO® NXT robotics kit, students construct and program robots to illustrate and explore the Fibonacci sequence. Within teams, students are assigned roles: group leader, chassis builder, arm builder, chief programmer, and Fibonacci verifier. By designing a robot that moves based on the Fibonacci sequence of numbers, they can better visualize how quickly the numbers in the sequence grow. To program the robot to move according to these numbers, students break down the sequence into simple algebraic equations so that the computer can understand the Fibonacci sequence.
This is a series of five activities about geology on the moon. …
This is a series of five activities about geology on the moon. Learners will explore lunar stratigraphy (caused by lava flows), impact craters, the moon's history, spacecraft design in which students build models of the LRO out of edible or non-edible materials, and the future of lunar exploration. This guide includes the activities from the original Field Trip to the Moon guide plus activities relating to these two moon missions - Lunar Reconnaissance Orbiter and the Lunar Crater Observation and Sensing Satellite.
This course covers the fundamental driving forces for transport—chemical gradients, electrical interactions, …
This course covers the fundamental driving forces for transport—chemical gradients, electrical interactions, and fluid flow—as applied to the biology and biophysics of molecules, cells, and tissues.
This course introduces the basic driving forces for electric current, fluid flow, …
This course introduces the basic driving forces for electric current, fluid flow, and mass transport, plus their application to a variety of biological systems. Basic mathematical and engineering tools will be introduced, in the context of biology and physiology. Various electrokinetic phenomena are also considered as an example of coupled nature of chemical-electro-mechanical driving forces. Applications include transport in biological tissues and across membranes, manipulation of cells and biomolecules, and microfluidics.
This lesson describes the major components and functions of the immune system …
This lesson describes the major components and functions of the immune system and the role of engineers in keeping the body healthy (e.g., vaccinations and antibiotics, among other things). This lesson also discusses how an astronaut's immune system is suppressed during spaceflight due to stress and other environmental factors.
This resource is a video abstract of a research paper created by …
This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:
"Left unchecked, excessive CO₂ emissions have the potential to significantly warm the planet in the coming decades. One way to curb this trend is to develop more efficient power electronics, which can channel electricity from clean energy sources to the global grid, with minimal energy losses. A new study reports one device that could help make this clean future a reality. Losses in traditional power electronics can be traced to the relatively sluggish movement of the charge carriers that carry current through them. That translates to slow switching speeds and overall inefficient device performance. This new device takes advantage of a phenomenon called bulk conduction, where charge carriers are generated (in this case, with light) and controlled nearly simultaneously throughout the device. Results showed that the device, made from silicon carbide, could perform 6 times faster than existing solid-state devices. That speed improvement alone could help reduce global CO₂ emissions by more than 10%..."
The rest of the transcript, along with a link to the research itself, is available on the resource itself.
Filtering is the process of removing or separating the unwanted part of …
Filtering is the process of removing or separating the unwanted part of a mixture. In signal processing, filtering is specifically used to remove or extract part of a signal, and this can be accomplished using an analog circuit or a digital device (such as a computer). In this lesson, students learn the impact filtering can have on different types of signals, the concepts of frequency and spectrum, and the connections these topics have to real-world signals such as musical signals. Students also learn the roles that these concepts play in designing different types of filters. The lesson content prepares students for the associated activity in which they use an online demo and a variety of filters to identify the message in a distress signal heavily corrupted by noise.
Students learn the basic principles of filtering as well as how to …
Students learn the basic principles of filtering as well as how to apply digital filters to extract part of an audio signal by using an interactive online demo website. They apply this knowledge in order to isolate a voice recording from a heavily noise-contaminated sound wave. After completing the associated lesson, expect students to be able to attempt (and many successfully finish) this activity with minimal help from the instructor.
This course about financial technology, or FinTech, is for students wishing to …
This course about financial technology, or FinTech, is for students wishing to explore the ways in which new technologies are disrupting the financial services industry—driving material change in business models, products, applications and customer user interface. Amongst the significant technological trends affecting financial services into the 2020’s, the class will explore AI, deep learning, blockchain technology and open APIs. Students will gain an understanding of the key technologies, market structure, participants, regulation and the dynamics of change being brought about by FinTech.
We plan to facilitate several engineering lessons that requires students to design, …
We plan to facilitate several engineering lessons that requires students to design, build ROV controllers, calculate weight, underwater thrust and buoyancy.
In this activity, the students will investigate a variety of plants and …
In this activity, the students will investigate a variety of plants and animals common to the Amazon through research. They will determine the plant or animal characteristics that make them edible or useful for the trip and learn to categorize them by comparing similarities and/or differences.
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