Randy F. Espinal, PhD

Fulbright Scholar to the U.S. @fulbrightprgrm| Founder @ventnostics| Bioanalytical Chemist| Data Scientist

[Randy F. Espinal, PhD @randyfespinal]

1/ .@AmerChemSociety "Chemical sensor researchers have embraced consumer electronics with gusto because of the convenience and possibilities they provide. Think about the connectiveness of smart phones. Think about the cameras on these phones..

[ACS Sensors @ACS_Sensors]

“Chemical sensors are an unmet need within smart devices, despite the fact that watches & phones typically have many sensors”.

Justin Gooding, Editor-in-Chief @ACS_Sensors weighs out pitfalls & rewards of relying on consumer electronics
Thread 1/2
https://t.co/1Pu5miK0fk

[Fermat's Library @fermatslibrary]

Canadian computer scientist Ken Iverson introduced the modern symbols and names for the floor and ceiling functions in 1962.

Typesetters made the symbols work by trimming the tops and bottoms of the square brackets, [ and ].

Iverson's notation was quickly adopted.

[Fermat's Library @fermatslibrary]

Green flashes are sometimes glimpsed above the setting or rising sun. Here's a quick explanation of this effect.

[Adam Grant @AdamMGrant]

A sign of wisdom is choosing not to believe everything you think. A mark of emotional intelligence is choosing not to internalize everything you feel.

Thoughts and emotions are possibilities to ponder, not facts to accept. We don’t always invite them in, but we do decide whether they deserve to stay.

[Fermat's Library @fermatslibrary]

Joseph Liouville was born exactly 216 years ago. In 1844, he became the first person to prove the existence of transcendental numbers — numbers that are not roots of any non-zero polynomial equation with integer coefficients — and provided the first explicit decimal examples, such as the Liouville constant.

[ESPN @espn]

THE 10-SEED RAZORBACKS SURVIVE THE ST. JOHN'S RALLY! 😤

John Calipari is just the second coach to take FOUR different schools to the Sweet 16 🔥

[University of Arkansas @UArkansas]

SWEET 16 ‼️

[SportsCenter @SportsCenter]

John Calipari and Arkansas take down legendary coaches BACK-TO-BACK in Cal's first year with the Razorbacks 😮

[Arkansas Men’s Basketball 🐗 @RazorbackMBB]

HOGS WIN

[SEC Network @SECNetwork]

THE HOGS ARE SWEET 16 BOUND‼️ @RazorbackMBB

[Arkansas Razorbacks 🐗 @ArkRazorbacks]

ITS PRONOUNCED KAN-SAW

[Fermat's Library @fermatslibrary]

Here's an example when scientists were wrong - and the outsider was right

In Gulliver’s Travels (1726), Jonathan Swift mocked British scientists for failing to solve the Longitude Problem: how to track your east-west position within a mile after crossing the Atlantic.

It was the great scientific challenge of the 18th century. Parliament offered £20,000 - worth millions today - for a solution, entrusting the Royal Observatory to award the prize.

In 1731, a self-taught clockmaker, John Harrison, cracked it. The astronomers didn’t believe him. For 40 years, Harrison refined his invention while the Observatory stonewalled.

Only in 1773 - by act of Parliament - did he finally receive the prize and east-west navigation could be made safe.

[Mastery Quotes @MasteryQuot]

The ability to focus is the key to all achievement.

[Arkansas Men’s Basketball 🐗 @RazorbackMBB]

Dancin' deets

[Daniel Pink @DanielPink]

Less talk, more action. Be the change instead of just yapping about it.

[Adam Grant @AdamMGrant]

Happiness depends on the freedom to exit toxic relationships and enter healthy ones.

97k people, 34 countries: Well-being is higher when changing groups, friends, and partners is easy and acceptable.

A vital form of liberty is the ability to choose the people in our lives.

[Fermat's Library @fermatslibrary]

If you put a spherical loaf of bread through a bread slicer, then each slice comes out with equal crust

[Fermat's Library @fermatslibrary]

Mathematician G.H. Hardy on proof by contradiction

[Fermat's Library @fermatslibrary]

On November 12, 1833, there was a meteor shower so intense that it was possible to see up to 100,000 meteors crossing the sky every hour. Many at the time believed it was the end of the world, leading Adolf Vollmy to create a woodcut inspired by the event.