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Sam Cooper
United Kingdom
เข้าร่วมเมื่อ 28 พ.ย. 2006
Samba Segment Tutorial
www.sambasegment.com
0:00 - Intro
02:34 - 1. Handling Data
04:22 - 2. Labelling
09:15 - 3. Viewing
10:15 - 4. Segmenting
12:38 - 5. Saving Results
github.com/tldr-group/samba-web
0:00 - Intro
02:34 - 1. Handling Data
04:22 - 2. Labelling
09:15 - 3. Viewing
10:15 - 4. Segmenting
12:38 - 5. Saving Results
github.com/tldr-group/samba-web
มุมมอง: 74
วีดีโอ
Introduction to tomographic imaging, reconstruction, segmentation and analysis - Dr Sam Cooper 2022
มุมมอง 1.2K2 ปีที่แล้ว
This lecture was delivered as past of the Institute for Molecular Science and Engineering (IMSE) MSc course at Imperial College London in January 2022. 00:03:05 - Image acquisition 00:11:20 - X-ray computed tomography (XCT) 00:34:21 - Neutron tomography 00:44:48 - Electrons tomography 01:05:38 - Reconstruction 01:24:00 - Segmentation 01:32:16 - Data analysis and metric extraction
Introduction to Electrochemical Impedance Spectroscopy (EIS: Maths and Theory)
มุมมอง 53K3 ปีที่แล้ว
Lecture deliver as part of a series from the Electrochemistry Network for graduates at Imperial College London (17/02/2021). Dr Sam Cooper - www.imperial.ac.uk/people/samuel.cooper If you enjoy this style of teaching, try my Mathematics for Machine Learning specialization on Coursera: www.coursera.org/specializations/mathematics-machine-learning Follow me on twitter: camsooper And t...
Coursera: Mathematics for Machine Learning - Introduction to Multivariate Calculus: Welcome!
มุมมอง 1.2K5 ปีที่แล้ว
Welcome video for Course 2 on the Mathematics for Machine Learning specialisation (Version 2). Link to course: www.coursera.org/learn/multivariate-calculus-machine-learning Link to specialisation: www.coursera.org/specializations/mathematics-machine-learning Check out the reviews on Class Central : www.classcentral.com/course/coursera-mathematics-for-machine-learning-multivariate-calculus-10452
DE1-MEM: Fourier Series
มุมมอง 1K7 ปีที่แล้ว
In this lecture we introduce the topic of Fourier series, including some examples of when they can and can't be used. The lecture was created for the DE1-MEM course at the Dyson School of Design Engineering, Imperial College London.
DE1-MEM: Power Series
มุมมอง 5717 ปีที่แล้ว
In this lecture we introduce the topic of power series, including some examples of when they can and can't be used. The lecture was created for the DE1-MEM course at the Dyson School of Design Engineering, Imperial College London.
DE1-MEM: Sequence and Series
มุมมอง 5147 ปีที่แล้ว
In this lecture we discuss sequence and series, as well as introducing the topic of convergence. The lecture was created for the DE1-MEM course at the Dyson School of Design Engineering, Imperial College London.
DE1-MEM: Curve Sketching
มุมมอง 8767 ปีที่แล้ว
In this lecture we work through the steps required to sketch a function. Bonus info: Domain: (-inf,2)u(2,inf) Range: (-inf,9-6root(2)]u[9 6root(2),inf) The lecture was created for the DE1-MEM course at the Dyson School of Design Engineering, Imperial College London.
Microtubular Solid Oxide Fuel Cell
มุมมอง 5869 ปีที่แล้ว
Microtubular Solid Oxide Fuel Cell Anode supported Silver-LSCF-CGO-CGO/Ni-Silver 1 mm Diameter X-Ray Microtomography Thresholded 3D www3.imperial.ac.uk/people/samuel.cooper08
Why did you stopped uploading videos. Great video this.
just too basic for electrical guys when he talks about basics of impedances in the first one hour unfortunately.
Hello, Good morning, I appreciate the knowledge shared on this channel. Studying about the EIS technique I have a doubt that I have not yet been able to solve clearly, the question is What does it mean that a material has its phase angle at lower or higher frequencies than another material? In which of these cases would there be a higher resistance to corrosion?
Guess the even function should be f(x) = f(-x) instead of f(x) = -f(x)
Thank you
excellent Explanation
I enjoyed your presentation. Thank you
Thanks much for the wonderful video👍
The best lecture for someone who wishes to brush up the EIS chapter. Thank you Sam🙏
Thank you for this excellent video. This is just amazing.
Hi Dr. Cooper, thanks for the great Video. Could you please tell me which tool you used to simulate the circuit in your animation? 😊
Just a little matlab script
the math lost me
Excellent explanation on this topic! I have a question regarding EIS for large Li ion battery cells (over 50Ah, prismatic or pouch). the impedance of these kind of cells is significantly lower than the typical cylindrical cells so how can you "wake up" these cells?
It is a very informative video. Thanks for your good explanation.
This is just amazing. Probably the best introductory lecture video I found on TH-cam on EIS.
greeeeat video. helped me a lot! coincidentally, i will be going to imperial college in a few months and this video is part of my preparations. what a small world...
1:20:43
1:15:10
1:20:43
Great work. I have a question. Why imaginary part is negative and what is characteristic frequency?
Outstanding presentation. I like it. Great!!!
As an EE student, I found this material is overly complicated. So the first hour is about phaser. The next part is about circuit components in series and parallel solving using phasers. Characteristic frequency is where half the current contribution is flowing from the resistor and half is on the capacitor. When you daisy-chain multiple parallel RC blocks you just have multiple taus. I watched the whole 2 hours and still didn't get the point of EIS. Do you want to sweep the frequency and look at the output response to characterize the system?
Fantastic lecture. Really enjoyed it!
Thank you so much ! Really like the lecture.
Thank you for the nice presentation! Will you consider to make a second video regarding how to model all process in a battery into the RC equivalent circuit?
Just WOW ! ! ! Awesome ! ! !
I love the way Dr. Cooper delivers information, always greatly enjoy your talks
Great video and great explanation. Really shows the amount of effort that went into this video. You have a new subscriber! :D Also, really liked the part when someone sent you flowers!
T H A N K Y O U! It helps a lot. We can´t find out some of these information even in books.
this is really amazing . nicely explained.
How Can I reach the stable state with a coating electrode? What technique can I apply before the EIS study and how I know the stable state is reached?
Very useful. thanks for the presentation 👌
Excellent lecture !!
Absolute legend!
Priceless! Please make more courses available on TH-cam. Your teaching skills are too rare and valuable to not do more for the public. Thank you so much!
I can't beleive how good the rope example was. I'm somebody who works with a potentiostat but never reached such a point of general understanding of what actually happens in those wires!
Puff of air under the sheet! That got me both happy and laughing. Happy that I finally have a clear example in my mind about the situation, and laughing at how simple but close the example is.
Thank you Dr. Cooper, Quite informative to understand the basics of EIS. 😊👍🏻
As a master's student, this is the easiest course I have ever seen!! Thanks You~! Hope it will be explained about Warburg Thanks!!
Amazing lecture, Dr. Cooper! Some authors showed either faradaic and non-faradaic proccess in the diffusion bulk solution or charge transfer effects. So how can we describe this two proccess (faradaic and non-faradaic) for the Nyquist plot and the circuit equivalent components?
This was an amazing lecture Dr. Cooper. I however have one question. I understand that we obtain the capacitance of the system from the value of tau-c. What is the physical significance of the tau-c? What information does it give us about the system being measured? :-)
Thank you Emmanuel! Perhaps one way to think about it is the following: let’s say you measure a system and extract an impedance spectrum. At each frequency you now have an impedance value. If you had a simple semi-circle shape only, you might assume a parallel RC circuit. You could then immediately determine the value of R from the more frequency intercept. However in order to work out C you could either use a circuit fitting package (like Z-view) to fit the semi-circle, or instead just read off the frequency at the top of the semi-circle (remembering that tau_c = RC). Once you know C, you have to hypothesis about what is physically causing this capacitance in your system. Think of it like a blocking spring somewhere, for example, liquid ions packing densely together (due to a voltage) near the surface of an electrode. When the voltage is relaxed, the ions will spring back to a lower energy configuration. If the capacitance is very high, it might suggest that your material has a very high microscopic surface area for example.
Could you provide me a book on this topic, please.
와... 엄청난 강의다
Thank you! :-)
1:01:25 that's funny
Sam, would some "funny shape" fillers/ pigments/ additives for organic coatings impact the shape of a Nyquist plot? And, could they change the spectrum in such a way that the analyst could think there is a reaction where, in fact, it would be just a response of the system?
Fantastic video. Would be great if you can make one on analyzing the data and correlating with systems being investigated
Great explanation
how to do it for the samples of thin film on ito , fto
Really amazing lecture
Can we get the presentation slides please? Loved it, helped me a lot <3
Link now in the description!
Thanks for the great lecture. What is alfa, I mean alfa in the Z CLE Formula, in physics?
One way to think about it is the ratio of capacity to resistance in the component. alpha=0 means no capacity (it's a resistor), alpha=1 is no resistance (its a capacitor). So you might have a kind of faulty capacitor where the more capacitance you want to access, the more energy loss (resistance) you have to pay
@@sajoco Thank you very much! We are blessed having such a wonderful lecture.
I enjoyed every minute of your lecture. Thank you very much!
Very kind of you to say, thanks!
Hi Sam! Do you have some recommendations for SYMMETRICAL CELLS? I'm working on this and need to understand the chemistry behind it. I'll appreciate your recommendation. Thanks for your time.
I'm afraid I don't have any specific recommendations. I vaguely remember watching a great talk on this by Bernard Boukamp, but don't think it was recorded.
Many thanks for your response, Sam. I really appreciate 🙏🏿.
I'm not sure i do really. Some tips - if you do impedance at either 0% and 100% state of charge, you're gunna have a bad time because you cant lithiate more than 100% or less than 0%...