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Involutory Property of the Discrete Hartley Transform
Involutory Property of the Discrete Hartley Transform
Discret Hartley Transform is a unitary transform although its proof is hard to find in the Web. This short note explains that the Discrete Hartley Transform is an involution, which implies that this transform is unitary indeed.
Frank the Bunny
Physical Interactions of Simple Tools with JSC-1A Regolith Simulant
Physical Interactions of Simple Tools with JSC-1A Regolith Simulant
As part of the NASA IMPACT program to model mechanical interactions with bodies in space such as comets, asteroids, and other Near Earth Objects (NEOs), the Colorado School of Mines team is designing a motor stage apparatus to interact with JSC-1A regolith simulant surfaces. This initial study involved development and testing of a prototype motor stage apparatus which was used to drive three types of probes into JSC-1A surfaces while collecting force data under standard Earth atmospheric conditions. The probes used were a conical-tipped probe, a wedge-tipped probe, and an anchoring probe. Main goals of the prototype system were to acquire general force trends for each interaction, and to isolate the most important design features for a more-complex in-vacuum system. Our data revealed force interactions that were very small in magnitude—on the order of tenths of Newtons—and more complex than our simple stiff beam probe and mount model could accurately predict. Our results lead us to recommend a more complex experimental model that can accurately represent deflection in the probes while also allowing for better measurement of regolith movement near the tip of the probes. Specifically, we recommend the following design features for the in-vacuum system: a load cell capable of measuring at very low ranges (thousandths of Newtons), reliability of structural axis alignment between trials, a robust mounting system that can accommodate each different type of probe, and consistency of sample preparation between trials.
ted
The Mathematics of Cryptography
The Mathematics of Cryptography
University Assignment
Joe Allen
HW1: Linear System Theory (ECE532)
HW1: Linear System Theory (ECE532)
HW1: Linear System Theory (ECE532)
thanh nguyentang
ARML Lecture:  Intermediate Proofs
ARML Lecture: Intermediate Proofs
A lecture on intermediate proofs that I taught at ARML.
Justin Stevens
homework 4w
homework 4w
homework 4w
Geoffrey Bostany
E5 Übungsblatt 3
E5 Übungsblatt 3
Experimentalphysik 5: Kern- und Teilchenphysik
Jean Amadeus Elsner
MY FAVORITE THEOREM
MY FAVORITE THEOREM
A requirement for our Math330 class.
princess sy

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