Matrix Multiplication in the form Ax=B [Linear Algebra][Part2] Scott Lawson 2012-04-16 | Second part of the hectare field question. Here we have to solve for yield in tons per hectare. Solving the linear system of equations for the particular solution returns us our vector X1,X2,X3. Part one of this question can be found here http://www.youtube.com/watch?v=oZHIMsYHfg0
Cyclops plankton covered in other microorganisms (microscope view) Scott Lawson 2022-01-23 | This crustacean was found in a freshwater pond in Vancouver, Canada. The surface of the plankton is teeming with life, as many small microorganisms appear to be hitching a ride on this creature's exoskeleton.
Large ciliate found in freshwater pond seen with microscope. Scott Lawson 2022-01-20 | 4x objective with Nikon Ti microscope. Ciliate visible moving around in a freshwater pond water sample. The ciliate is quite large, relatively speaking, at around 1mm in length.The ciliate appears to be Spirostomum.
Microscope view of rotifer found in wet moss Scott Lawson 2022-01-18 | This rotifer was found in a clump of moss in Vancouver BC. The imaging technique used in this video is differential interference contrast (DIC) which is why the background is blue.
moss water with nikon ti microscope Scott Lawson 2022-01-16 | mossy water sample collected in Vancouver BC. Differential interference contrast.
Bluetooth gamepad using ESP32 and Zaber T-JOY3 joystick Scott Lawson 2019-12-23 | This is a modified Zaber T-JOY3 joystick with an ESP32 and lithium battery inside. It connects to the computer as a bluetooth gamepad, very similar to how a bluetooth xbox controller works.Source code for this project: github.com/scottlawsonbc/espjoy
LED strip music visualization using ESP8266 Scott Lawson 2016-12-27 | Short demo of my LED strip music visualizer. I am using a one meter LED strip (ws2812b) with 60 pixels (cost was $15 USD). The LED strip is controlled by ESP8266 module (cost was $6 USD). A computer records and processes audio in real-time and generates a 1D visualization which is streamed to the ESP8266 over WiFi.I have open sourced all of my code for this project. If you would like to make your own LED strip music visualization you can find all of the information on my GitHub repository: github.com/scottlawsonbc/audio-reactive-led-strip You can make your own strip for only $20-30 USD!Short audio clips are used in accordance with fair use doctrine.
Incredible steel wool combustion reaction [4K] Scott Lawson 2015-12-14 | This video shows the combustion reaction of steel wool. The reaction is started by passing electric current through the steel wool. The electric current causes joule heating, which rapidly heats the steel wool to the point of combustion. The hot steel wool reacts with atmospheric oxygen to produce Fe3O4 (magnetite), a naturally occurring iron oxide.The combination of high surface area and plenty of oxygen sustains the reaction as it propagates throughout the steel wool. After oxidation, the steel wool is covered in Fe3O4, leaving a blue-grey oxide coating. This coating actually makes the steel wool slightly heavier than before the reaction started.You can also burn steel wool by touching it with a common 9V battery, or with a lighter. The ability of steel wool to combust even when damp or in poor weather conditions makes it useful for starting fires in camping or survival situations.I filmed this video in 4K resolution using a Oneplus One smartphone. Video playback speed is real-time, nothing has been sped up or slowed down.If you would like to use this video then you are welcome to embed it using the embedded youtube player, but please do not reupload it.
Octopus eats a sea urchin in a tide pool Scott Lawson 2015-07-07 | This octopus was found in a tide pool in Botanical Beach, British Columbia. The octopus released an eel and swam to a nearby rock where it devoured a sea urchin. Filmed by Monique Ly with a GoPro camera.
Picomotor unidirectional ramp driver test Scott Lawson 2015-02-16 | Music playing on a picomotor piezo motor actuator using a custom slip-stick driver
RepRap Lawson 3D printer 150mm bridging test Scott Lawson 2014-11-16 | 150mm bridging test on a RepRap Lawson printer. Bridge torture test model designed by triffid_hunter.Thermoplastic: Natural PLATemperature: 181°CHotend: E3D V6Nozzle diameter: 600 micron
RepRap Lawson 3D printer speed test 175 mm/s Scott Lawson 2014-11-05 | 3D Printer: RepRap LawsonLayer height: 200 μmPrint speed: 175mm/sOuter shell print speed: 80mm/sX-axis acceleration: 8000m/s^2Y-axis acceleration: 4000m/s^2Thermoplastic: PLANozzle Temperature: 220°CHotend: E3D V6Model: Cylinder head from '5-Cylinder Radial Engine Model' on Thingiverse
RepRap Lawson first print Scott Lawson 2014-10-19 | First print with a RepRap Lawson 3D printer. Object being printed is a small herringbone gear with will be used to upgrade the Bowden feed extruder gears. 200 micron layer height.
Polyethylene 50W laser sintering test Scott Lawson 2013-11-28 | A 50W laser cutter is used to test the feasibility of polyethylene fiber sintering. The polyethylene shown is a compressed section of finely ground polyethylene fiber. It has the consistency of powder.
UBC Rapid first test of Varian Sample Preparation Scott Lawson 2013-09-28 | First test of UBC Rapid's Varian Sample Preparation machine which is to be converted into a rapid prototyping device.
Incredible 3D printer bridging ability Scott Lawson 2013-07-17 | This is a RepRap MendelMax printer built by UBC Rapid, a University of British Columbia student engineering team. For more information on UBC Rapid, see this link http://www.ubc-rapid.com/blogThis video demonstrates how 3D printers can bridge gaps to create 3D objects without support materials. Shorter gaps can be bridged more quickly and more accurately than longer gaps. Shown here is an extreme example of bridging which demonstrates the versatility of open source RepRap 3D printers.Here is the final product http://i.imgur.com/XgKcXjg.jpg . The bridge span is 75mm (~3in) and I've included a 3D printed Lego compatible block for size reference. Here's a closer image of the top of the bridge http://i.imgur.com/XQk7EXX.jpg . Keep in mind that this is a torture test designed for the sole purpose of pushing the limits of our printer's bridging capability. It's not meant to be a practical piece, but it demonstrates the potential for long distance bridging.If anyone is interested, here's a random selection of printed items http://i.imgur.com/VCmdNgg.jpg that I could find lying around the lab. Our team has printed these over the last couple of months. There are several practical pieces such as the turbine, gears, mecanum wheel, cable chain and extruder carriage.The material being extruded is a thermoplastic called PLA, which is biodegradable and inexpensive.Credit goes to triffid_hunter for designing the bridging 3D model which can be found here http://www.thingiverse.com/thing:12925 . The model shown in this video is scaled to 150% normal size.Printing speed was slowed to 5mm/s for the purpose of the demonstration. With sufficient cooling, bridging speed can be safely increased by an order of magnitude.
MendelMax PLA Test Print 65mm/s Scott Lawson 2013-04-15 | This is one of the first successful prints of UBC Rapid's newly constructed MendelMax printer. The MendelMax is an open source RepRap printer with a stable and accurate design. The object being printed is the side of a small catapult model found on thingiverse. The final product can be seen here: http://i.imgur.com/WyP6qHl.jpg Learn more about UBC Rapid: http://www.ubc-rapid.com/blog
Magnetic Putty Devours Magnet Time Lapse + Reverse HD 1080p Scott Lawson 2013-03-29 | Shown here is a time lapse that I took of a strong iron boron neodymium magnet being absorbed by magnetic putty. The recording time was just under half of an hour and is played back at 80x speed. The magnetic putty is attempting to pull the iron boron magnet to the center of its gelatinous mass, where it will be as evenly coated with putty as possible.Magnetic putty is a silicon polymer infused with millions of ferromagnetic particles, typically iron oxide powder. It looks and feels like regular silly putty, but when a magnetic field is applied the ferromagnetic particles will align and form a temporary magnet. If the applied magnetic field is removed, the putty will retain it's magnetic properties until thermal agitation will eventually shake the particles and it will lose its magnetic alignment.Song is Urbana-Metronica (wooh-yeah mix) produced by the talented spinningmerkaba and licensed under Creative Commons Attribution 3.0.
Magnetic Putty Time Lapse 1080p Scott Lawson 2013-03-25 | Magnetic putty time lapse as it absorbs a rare-earth magnet. Taken over 1.5 hours at 3fps, played back at 24fps. The magnetic putty will eventually arrange itself so that the outer surface is as evenly distributed around the magnet as possible. Ferromagnetic particles in the putty are strongly attracted to the magnet and very slowly engulf the surface of the magnet. The magnet shown in the picture is a strong neodymium iron boron magnet. It's a very powerful magnet for its size and could erase magnetic stripes found in credit cards and damage electronics!The putty looks and feels like regular silly putty, but the difference lies in the fact that it has been infused with millions of micron-sized ferrous particles (most often iron oxide powder). The magnetic putty is not actually magnetic by itself, since the infused particles are made of iron powder.The presence of the strong neodymium iron boron magnet (the silver cube in the video) magnetizes the ferromagnetic particles in the putty. When this happens, the ferrous particles align with each other and this alignment generates north and south magnetic poles, making the putty into a temporary magnet. Once magnetized, the putty will remain magnetized even after the rare-earth magnet has been removed from the putty. This effect persists for a few hours until thermal agitation shakes the particles and they lose their alignment.Song is Blue Circles by unreal_dm licensed under Creative Commons AttributionHere is a picture of what the putty looked like after a long time had elapsed http://imgur.com/97t28Fw
Minimum and Maximum Values Using Lagrange Multipliers Scott Lawson 2012-11-13 | Example question on using Lagrange Multipliers to find the min/max or optimize a multivariable calculus question. Find a,b,c so that the volume (4/3)pi(abc) of the ellipsoid (x^2)/(a^2) + (y^2)/(b^2) + (z^2)/(c^2) = 1 passing through the point (1,2,1) is as small as possible.
Plasma Arc Speaker Prototype Scott Lawson 2012-11-05 | One of the first tests of our plasma speaker. It's a work in progress. The circuit is driven by a 555 timer and a mosfet. A flyback transformer is responsible for the plasma arc. The audio is much more clear in person, my camera microphone struggles to record the higher frequency sounds that this speaker emits.
UBC Engineering Fun With Science Sodium Explodes over a building Scott Lawson 2012-09-07 | A UBC Engineering student repeatedly throws a block of sodium into a fountain, causing it to explode. On the third try, the sodium explodes over a nearby building, deemed the 'Cheese'
UBC Engineering Fun With Science Potassium Nitrate and Magnesium Scott Lawson 2012-09-07 | A UBC Engineering student combines magnesium and potassium nitrate in a fiery combination. Delicious, delicious fumes were the result.
UBC Engineering Sodium Exploding in Water Scott Lawson 2012-09-07 | UBC Engineering 'Fun With Science'. A UBC Engineering student throws a large piece of sodium in a fountain, causing it to explode.
Scott Lawsons Science and Engineering Channel Scott Lawson 2012-08-19 | Intro video for Linkman11's channel. Videos on calculus, physics, chemistry, linear algebra and astrophotography.
Saturn through 4.5in reflector Scott Lawson 2012-05-11 | Saturn taken through my 4.5in reflector on May 9, 2012. No magnification
Venus through 3.5in reflector Scott Lawson 2012-05-08 | Venus through 3.5in reflector. Atmospheric quality was poor and stability of the tripod was poor as well. Webcam is the microsoft HD-5000.
Understanding Inductors Scott Lawson 2012-04-19 | An overview of why inductors produce a counter emf (also called back emf). This video discusses the units of inductance, the energy stored in an inductor and how the intersections of magnetic field lines will induce current. How inductors work.
Matrix Multiplication on the form of Ax=B [Linear Algebra] [Part1] Scott Lawson 2012-04-16 | How to approach a problem dealing with matrix multiplication in the form Ax=B. The second part of the question is solved in this video http://www.youtube.com/watch?v=-sN7t1rkdgo
Finding a vector parallel to plane equations [Linear Algebra] Scott Lawson 2012-04-15 | How to find a vector parallel to plane equations with a specific length. You can take the cross product of the two normal lines of each plane and solve for a scalar value needed to obtain a specific length. Sorry for the static near the beginning of the video.
Alternating Current Basics [Timelapse] Scott Lawson 2012-03-30 | Timelapse for prereading of Phys 153 textbook, Modern Physics. Describes sections 31.1 to 31.3. For University of British Columbia first year physics. There is no audio do to the time compression, feel free to play your choice of dubstep in the background
Understanding Capacitors Scott Lawson 2012-03-14 | Very general overview of how a capacitor stores charge. The next video in the series will cover practical applications and I will do some example questions
DIY Potato Cannon Explodes Fail Scott Lawson 2012-02-29 | DIY Potato cannon filled with butane explodes out the wrong end, the potato did not even leave the barrel. The end cap left a small crater in the ground.
Improper Integrals and Convergence + Divergence [Examples] Scott Lawson 2012-02-28 | Part 1 of 2. This video introduces Convergence and Divergence and type 1 improper integrals (infinite interval). Part 2 introduces type 2 improper integrals and the comparison test.
Integration by Parts Examples -Calculus- LIATE method Scott Lawson 2012-02-05 | More advanced integration by parts examples. For an introduction to integration by parts, see the first part of this video http://www.youtube.com/watch?v=rVmfkSsaxBU
Introduction to Integration by Parts -Calculus- Scott Lawson 2012-02-05 | Introduction to Integration by Parts, this video introduces the concept and I go over some examples ln(x) and x*e^x. In the next video I go over some more advanced examples.
Introduction to Solids of Revolution - How to find the volume of a curve - Calculus- Scott Lawson 2012-01-24 | Basic introduction to solids of revolution. How to find the volume between two curves or a single curve. How to use integrals to find the volume.
Finding the vector equation for a line that intersects two planes - Linear Algebra - Scott Lawson 2012-01-21 | How to find the line where two planes intersect or meet. Using the cross product and centering the plane on some point, we can put the equation in parametric form. In this video I demonstrate one method for calculating the cross product. http://www.youtube.com/watch?v=e9T5p_Jwv5c&list=UUkR94koIQ7_lEL-VNLAVKxw&feature=plcp
Very easy way to calculate the cross product - Linear Algebra - Scott Lawson 2012-01-20 | How to calculate the cross product:A simple method for computing the cross product. Just remember that the cross product is:TWO vectors in THREE dimensional space that returns ONE vector. Then you get the sequence 2,3,1 and follow the X method. Finding the cross product.
Calculating the Propagation of Uncertainty Scott Lawson 2012-01-14 | How to calculate the uncertainty of a value that is a result of taking in multiple other variables, for instance, D=V*T. 'D' is the result of V*T. Since the variables used to calculate this, V and T, could have different uncertainties in measurements, we use partial derivatives to give us a good number for the final absolute uncertainty. In this video I use the example of resistivity, which is a function of resistance, length and cross sectional area.
How to estimate the area under a curve using Riemann Sums Scott Lawson 2012-01-12 | Introduction on how to use left and right Riemann Sums to estimate the area under curve. In the next video I cover how to use integrals to calculate the exact area.
How to Improve Your Memory - Introduction to Method of Loci Scott Lawson 2012-01-07 | In this video I introduce the concept of using the Method of Loci to effectively memorize unstructured information by converting it to spatial information. In the next videos in the series, I expand on the methods used to convert information as well as applying the method of Loci to words, numbers, and other unintuitive types of data. By using the Method you can greatly improve your memory and this can be employed to get better grades and even memorize formulas and facts for exams.
Example Calculus Optimization Problem (fastest route) Scott Lawson 2011-12-16 | How to find the shortest route between two points using calculus optimization. In this video, I calculate the fastest mixture of walking and swimming for a swimmer to reach a cottage. The trick is understanding the problem, drawing a diagram and putting the variables in terms of a single variable.
Finding Limits using lHopitals Rule Scott Lawson 2011-12-16 | How to calculate indeterminate limits that are either infinity over infinity or 0/0 or -inf/-inf. Using l'Hopital's rule we can use derivatives to eliminate this.
Sound intensity and wave intensity example question Scott Lawson 2011-12-12 | An example question on how to calculate the intensity of a sound from different distances. The relationship between sound intensity and wave intensity and the average power of the wave. First part is http://www.youtube.com/watch?v=RsthjfPzjgw&list=UUkR94koIQ7_lEL-VNLAVKxw&feature=plcp
Sound intensity and Wave intensity introduction Scott Lawson 2011-12-12 | This video introduces the concept of wave intensity and sound intensity. Sound intensity is the decibel representation of wave intensity. As well, this video introduces the concept of average power and area as it relates to waves.
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