Donald Ellis @MathADon
University professor in electrical engineering. Hobbyist in programming (C/C++, MATLAB, Julia), data science, ham radio, music, and baseball. Phoenix, Arizona USA Joined November 2008-
Tweets326
-
Followers212
-
Following58
-
Likes3
EE/Math problem of the day (3/18/18): A bipolar music waveform with peak voltages +- 2.5 V will be encoded in binary computer bits, where each code represents a 20 mV signal span. How many bits will we need to encode this signal?
0
0
0
0
0
View Details
Just changed my Twitter name to Log2Don (from MathADon). A few years ago I was tweeting math problems for fun, maybe I'll try that again. But now not only math, but electrical engineering as well.
Donald Ellis retweeted
Long-time SciAm math columnist Martin Gardner died peacefully today, per James Randi, @jref. Randi's reflections: ow.ly/1ODo6
Donald Ellis retweeted
Today's date (01.02.2010) is a palindrome of numbers! It reads the same forward and backward :)
Donald Ellis retweeted
Holiday Tweet-a-Day time: A look at 2010! http://bit.ly/5OOWQO RT to win!
Science problem for 11/25: Water decomposes into 8 parts oxygen, 1 part hydrogen by mass. Why then is the formula for water H2O, not HO8?
Math problem for 11/25: Perpendicular lines have negative reciprocal slopes. If a line has slope 2/3, what's the slope of its perpendicular?
Answer to 11/12 science problem: When atoms emit particles from their nucleus, it's called radioactivity. Radioactivity can be dangerous.
Answer to 11/12 math problem: A circle is inscribed inside a square, the ratio of their areas is (pi r^2) / (2 r)^2 = pi / 4 or about 0.79.
Science problem for 11/12: When atoms emit electrons it's electric current. What's it called when atoms emit particles from the nucleus?
Math problem for 11/12: A circle is inscribed inside a square. What's the ratio of the circle's area to the square's area?
Answer to 11/9 science problem: In this case, the gravity force is same as the universal gravity constant G = 6.67 x 10^(-11) in newtons.
Answer to 11/9 math problem: It's a trick. Two circles touch at one point, but they might not be in the same plane! So 0 < d < 2r.
Math problem for 11/7: Two circles of radius 1 touch at a single point. What is the distance between their centers? Hint: maybe a trick!
Science problem for 11/9: Two large plastic spheres of mass 1 kg and diameter 1 meter are touching. What is their gravity attraction force?
Answer to 11/7 science problem: Standing in a vacuum chamber, you can't hear anything because sound needs something like air to travel in.
Answer to 11/7 math problem: First find the sum of all angles in a pentagon = (5 - 2) x 180 = 540. Then divide by 5 to get each angle = 108.
RT @timoreilly: Fascinating article about math in the Soviet Union, Russia, and the U.S. http://bit.ly/1GrEy2
Math problem for 11/7: Each angle in an eqilateral triangle is 60 degrees, and in a square is 90 degrees. What's each angle in a pentagon?
CoCalc by SageMath, I... @cocalc_ai
2K Followers 4K Following Build and use software with AI in shared CoCalc projects. Inspect the work, make changes, and keep going.
Genevieve Royce @ruth63665193461
413 Followers 2K Following Go outdoors and feel the sun, city and nature
lisbeth mora @lisbethmora1997
311 Followers 3K Following Passionate about health, repost does not mean agree, only personal opinionLove adventure: travel, golf, skiing and partying ☘️☘️
Harper @vegac5432
727 Followers 3K Following I love cycling. Cycling in the city or in the countryside is a healthy and environmentally friendly activity.
Beauty @EfezzoNastassja
395 Followers 4K Following I stayed true to myself, fearless, and stood up to evil even when I was wrong. God is victorious. Trump is our president, thank God!
Liu Fangyan @Abracellerssx
2K Followers 5K Following No matter how hard the loss, defeat might serve as well as victory to shape the soul and let the glory out.
Tateauez @Tateauez9fd
36 Followers 2K Following
Love Love @LoveLove686984
0 Followers 22 Following
Chloe Kim @funkjenny2009ij
116 Followers 4K Following From California, love to travel and explore nature. @women's health
Zeniff Partida @ZeniffP76630
6 Followers 303 Following
Neashit @neashit50607
19 Followers 2K Following There are no difficulties that cannot be overcome, there are only people who cannot overcome them.
Evan Horvith @EvanHorvith
601 Followers 3K Following Dawson High School Pearland TX 2024 | Varsity MIF | 6'0'' 180lbs I 3.7/4.0 GPA | SAT=1320 ACT =30 | [email protected] | @dawson_baseball | @OSPBaseball
Angela mary @maryloveth034
20 Followers 225 Following Loving💖💖just here for fun serious mind alone book me for pleasure 💋💋💋
Lincoln @AiSakata411185
1 Followers 67 Following Life isn't about waiting for the storm to pass， it's about learning to dance in the rain。
Kaweme Rajabu @KawemeRajabu
1 Followers 42 Following
Gaius Iliya @gaius_iliya
266 Followers 5K Following PG Student, International Master of Science Program in the Field of Embedded Artificial Intelligence (Co-funded by the Erasmus+ Programme of the European Union)
Andrew @Lukyandrew
388 Followers 2K Following
GOODNESS @finianfancy
43 Followers 728 Following electrical engineer, project manager, safety officer, and crypto enthusiast.
Azundow Dasori @EDasori
52 Followers 448 Following
Jay Cordes @jjcordes
242 Followers 2K Following Dad, data scientist, co-author of award-winning “The 9 Pitfalls of Data Science” https://t.co/5qzdNtnBAY
Mara Tecnologia @LincolnCesar8
3K Followers 4K Following 🚩🚩Mostro dicas importantes para você aplicar no seu dia a dia. Teremos muitas novidades. Sigo todos de volta.📌Administrativo🚩
Anil @AnilLamichhan11
57 Followers 301 Following Green Energy/technology ||Power Electronics ||Transport Electrification (Trains, Aircraft, Cars) ||Sustainable development.
kelcise.sesay @kelciseSesay
31 Followers 242 Following Engineer | Tech Enthusiast | Regulator | Husband and Dad |
Dr. Rahul Satheesh @rahulsatheesh21
190 Followers 2K Following Assistant Professor, CEN, School of AI, Amrita Vishwa Vidyapeetham Coimbatore |BOSCH | Doctorate Power systems NITC| Ex- BOSCH Global Software Technologies
Zubair C. @ZubairC14
4 Followers 204 Following
Axioms @Axioms_MDPI
648 Followers 1K Following Axioms (ISSN 2075-1680, IF 2.0) is an international, #openaccess journal of #mathematics, mathematical logic and mathematical physics.
Wahad Ur Rahman @wahad_rahman
20 Followers 186 Following Mechatronics Engineer, Lab Engineer (@UET Peshawar), Software Expert (MATLAB, Proteus, COMSOL Multiphysics, Arduino IDE)
Muhammad Asif @engrasifpk003
25 Followers 689 Following Proud to be a Pakistani,Research Scholar , Electrical Power System & its automatization Engineer
Katarin @Katarin09908625
4 Followers 93 Following I am working as a conference Secretary for Electronics and Electrical Engineering conference at an Albedo Meetings
Sabeer Saeed @sabeerawa05
1K Followers 5K Following @sabeerawa05 [email protected] MSC in @software_engineering_technology
MathWorks AI @MathWorksAI
1K Followers 523 Following Makers of #MATLAB & #Simulink. The enterprise engineering platform for AI. Follow @MATLAB for the latest of #DeepLearning, #MachineLearning and #DataScience
Architecture, Enginee... @ArchitectureE13
143 Followers 2K Following AET-2021 represents the ideal academic platform to spark discussions and present the latest research findings in all aspects of engineering sciences
Nikiha @Nikiha11
0 Followers 6 Following
Nicholas Bannor 🍀�... @lordinasparks
219 Followers 2K Following don’t mention my name on a table I don’t sit at 🤫👹(shuru🤫)
Engr Abba Abubakar @EngrAbbaAbubak1
12 Followers 438 Following I am student of knowledge , ( Islamic ) and Electrical and Electronics Engineering student
Semiconductor Enginee... @SemiEngineering
18K Followers 4K Following Deep Insights For The Tech Industry #semiconductor #semiEDA #AI #embedded #verification #lowpower #test #DataAnalytics #automotive #chipdesign #ICmanufacturing
ijaceee @ijaceeejournal
87 Followers 1K Following
Current Engineering T... @Roser59639570
411 Followers 4K Following Journal of Current Engineering and Technology (JCET) aims to publish research and scholar studies in field of Engineering and Technology Research
MATLAB @MATLAB
106K Followers 854 Following MATLAB is a high-level language and interactive environment for numerical computation, visualization, and programming 📲 Follow us on Instagram @MATLAB
The Julia Language @JuliaLanguage
29K Followers 317 Following Julia is a high-level, dynamic programming language built for technical computing. Join the conversation at #JuliaLang @JuliaConOrg @JuliaInclusive
MIT CSAIL @MIT_CSAIL
351K Followers 20K Following MIT's Computer Science & Artificial Intelligence Laboratory (CSAIL). Media Inquiries: [email protected] Check out the latest CSAIL content ⬇️
depths of wikipedia! @depthsofwiki
814K Followers 4K Following hi i’m @anniierau and i like wikipedia! more active at https://t.co/2nXPROcYCZ!
American Mathematical... @amermathsoc
78K Followers 644 Following The American Mathematical Society is dedicated to advancing research and connecting the diverse global mathematical community.
MAA @maanow
102K Followers 4K Following The Mathematical Association of America is the world's largest community of mathematicians, students, and enthusiasts.
Jody Jackson @Jody_Jackson
24K Followers 4K Following @Dbacks @MLB host and reporter. @AZCardinals and @AZSports contributor. faculty assoc @Cronkite_ASU Proud wife and mom FL born, AZ living instagram: Jodysports
Local Sports Arizona @BALLYSPORTSAZ
77K Followers 887 Following
GCU FacultyDev @GCU_FacultyDev
896 Followers 583 Following Official Twitter account of Grand Canyon University Faculty #GCU #HigherEd #GCUFaculty #GCU_FAB
Teresa Allen @rubyredruru
9 Followers 112 Following https://t.co/LAr3DSeD7Z -- 5 novels, 4 nonfiction, 4 poetry books. current novel: "The Man from Sacaton," my law school experience, life of a Pima Indian man.
SIAM @TheSIAMNews
21K Followers 222 Following SIAM helps build cooperation between math and the worlds of science and tech to solve real-world problems through publications, conferences, programs, & more.
Marette Hahn @marette_hahn
39 Followers 177 Following MS, Higher Education Support Professional | Student Empowerer | Growth & Love | Proud #AuggieAlum
Dina Higgins @DinaHigginsPE
100 Followers 47 Following
Inside Higher Ed @insidehighered
220K Followers 4K Following Helping 🫵 make sense of #HigherEducation. Follow us for the latest news, opinions, jobs, and resources. Send #HigherEd news and tips via DM.
Arizona Diamondbacks @Dbacks
598K Followers 3K Following The official account of the Arizona Diamondbacks.
MathWorks @MathWorks
34K Followers 117 Following Makers of @MATLAB & #Simulink. Accelerating the pace of discovery, innovation, & development in engineering and science. 📲 Follow us on Instagram @mathworks
JuliaHub @JuliaHub_Inc
12K Followers 97 Following JuliaHub’s flagship product Dyad combines SciML, digital twins & AI-driven simulations for high-performance modeling.
All About Circuits @AllAboutCircuit
7K Followers 259 Following One of the largest online electrical engineering communities in the world with over 700K engineers, who collaborate every day to design.
GCU News @GCUNews49
15K Followers 6K Following GCU News is the official news source for Grand Canyon University. #LopesUp
Grand Canyon U @gcu
141K Followers 33K Following The official Twitter account of Grand Canyon University. Founded in 1949, GCU is a private Christian university located in Phoenix, Arizona. #LopeCountry
The Ellen Show @TheEllenShow
62.2M Followers 23K Following The home for The Ellen DeGeneres Show on X. Enjoy the best moments from 19 incredible seasons!
Yuja @YujaWang
50K Followers 177 Following Official Account. Musician living life with curiosity & passion. 🎹 Ambassador @rolex @steinwayandsons @rimowa @EsteeLauder @OnitsukaTiger
Nikki Yanofsky @officialnikkiy
17K Followers 1K Following Gee, it's nice to see you here! ✨5X platinum jazz singer ✨
Digits @WSJdigits
43K Followers 78 Following Digits delivers breaking news and insights about the technology landscape, including Q&As with newsmakers, product news and strategic moves.
Phoenix Business Jour... @phxbizjournal
87K Followers 390 Following The Phoenix region's source for local business news & events. Part of the American City Business Journals network. Subscribe today! https://t.co/l1pwlAh8le
Forbes @Forbes
20.3M Followers 5K Following Sign up now for Forbes' free daily newsletter for unmatched insights and exclusive reporting: https://t.co/v3UAa9BzAT
IEEE Spectrum @IEEESpectrum
153K Followers 3K Following The latest technology news and analysis from the world's leading engineering magazine.
Wolfram|Alpha @Wolfram_Alpha
61K Followers 713 Following Official info source for Wolfram|Alpha, the computational intelligence engine by @WolframResearch founded by @stephen_wolfram.
WIRED @WIRED
10.4M Followers 317 Following For Future Reference. Sign up for our newsletters: https://t.co/Tl6GImvc8R
Tim O'Reilly @timoreilly
4.6M Followers 2K Following Founder and CEO, O'Reilly Media. Watching the alpha geeks, sharing their stories, helping the future unfold. Didn't pay for a blue check, cannot make it go away
Hans Rosenthal @rosy222
4 Followers 16 Following
Gary Waldman @jokesareme1
2 Followers 1 Following
WestValley101 @WestValley101
4K Followers 4K Following West Valley, Arizona. Also see http://t.co/AW48iEtrKn
The Onion @TheOnion
10.6M Followers 14 Following America's Finest News Source. Get the paper delivered to your door: https://t.co/jJP2Apbhe8. Signup for The Onion newsletter https://t.co/koxBGNkhqO
Ars Technica @arstechnica
2.5M Followers 1K Following Original news, reviews, analysis of tech trends, and expert advice on the most fundamental aspects of tech.
Scientific American @sciam
4.2M Followers 789 Following Awesome discoveries. Expert insights. Science that shapes the world.
USA TODAY Tech @usatodaytech
188K Followers 68 Following Breaking tech news, product reviews and more from USA TODAY.
The New York Times @nytimes
53.9M Followers 847 Following We seek the truth and help people understand the world. Not a subscriber? Your first month is now free in our app. https://t.co/e2FWJZOvXD
Tony Robbins @TonyRobbins
3.2M Followers 1K Following Empowering millions to live a life of meaning.
David Pogue @Pogue
1.2M Followers 2K Following "CBS Sunday Morning" correspondent; "NOVA" host; author; former NY Times tech columnist; dad of 3! Get my stuff by email: https://t.co/dWX7ur7BTU
Arizona DOT @ArizonaDOT
296K Followers 707 Following Driven to get Arizonans where they want to go. Hosted by PIOs Kathy, David, Julian, Lexi and Kelsey. For real-time traffic info, visit https://t.co/ZdMHqA8S4h
NYT Science @NYTScience
1.1M Followers 443 Following Science, Medicine, Environment, Space & Astronomy. Sign up for the Science Times email, in your inbox every Tuesday: https://t.co/kpdN2C1hDy
VisualMath @VisualMath
43 Followers 35 Following Helping Teachers Find Innovative ways to reach their students
NPR @NPR
7.7M Followers 57K Following NPR is an independent news organization committed to informing the public about the world around us. You can find us every other place you read the news.Trends for United States
You might like
Adam Allison
@BrightsideChef
384 Followers
Walusimbi James
@walusimbijimmy
232 Followers
Tim Caldwell
@mathnerd2011
21 Followers
Mark L. Adams
@au_eeprof
16 Followers
who, me!?!? (Parody o...
@garcant7
28 Followers