11.01.21 - Day 2? / Monday Motivation And A Double Shot Of Expresso;; My Project Is Off To A Fairly Good

Romanticize your education

the midday stillness of a library

coursework sprawled on top of a desk

notes on the margins of a textbook

tracing names carved into an armchair

the inherent eroticism of the library after dark

a note falling out of a battered book

reminders scrawled across your hands

cursive handwriting

whispers cutting through the silence of the dormitory

the cold glow of a laptop screen in a dark room

ink stains

notebooks with half the pages crossed out

passing notes during lecture

getting up at 3 am to google something

leatherbound books with gold lining

crisp white paper

the smell of new books

another go at the eagle nebula

Propagation of Error

When I first started in physics, I was utterly clueless about propagating error. After three years of college, I have a better grasp of it and feel more comfortable using it in the lab. Have a look if you’re having trouble with error propagation!

Error and Uncertainty

Error: an unknown quantity in the realm of the state of nature

Uncertainty: a parameter in the realm of our state of knowledge about nature

Type A uncertainty: statistical in nature (an example of this would be if you were launching an object 15 times and recorded each distance)

Type B uncertainty: not statistical in nature (an example of this would be a digital reading on a scale - no matter how many times you put the same object on the scale, you will get the same reading)

Random vs Systematic Error

Random Error

environmental fluctuations

equipment noise

natural processes

Systematic Error

environment: fixed beyond a relevant parameter

measurement technique: assumptions, experimenter bias

equipment with an offset or using equipment beyond its limits

uninformed choices

You can reduce random error by taking more measurements.

You can reduce systematic error through thoroughness, properly calibrating equipment, reading manuals, and ensuring reproducibility. 

Basic Error Propagation

This is the standard equation for error propagation:

This represents the uncertainty in the measurement of some value x. Suppose you are measuring this value based on this equation:

You took three measurements, a, b, and c, and plugged them into this equation to get x. However, there is some uncertainty associated with each of these three values. Let’s say you measured a on a scale, b on an oscilloscope, and c with a ruler. There is uncertainty associated with all of those measurements. When you’re reading the scale, you read it as 15.45g. Let’s assume there is an uncertainty of 0.01g in that reading. Similarly, you read your oscilloscope to be 3V, and there is an uncertainty of 0.05V. You read your ruler to be 3.45cm, and there is an uncertainty of 0.05cm. We now have our uncertainties for the three values:

a = 15.45g +/- 0.01g

b = 3V +/- 0.05V

c = 3.45cm +/- 0.05cm

The other aspect of the uncertainty equation is taking the partial derivative. Those are the dx/da and dx/db parts of the equation. We will take the partial with respect of each term. 

The partial derivative of the equation for x with respect to a is 2a2

The partial derivative of the equation for x with respect to b is 2

The partial derivative of the equation for x with respect to c is 4.5

Now, we can plug into our equation:

Your uncertainty in your measurement for x is +/- 22.86.

I hoped this helped you if you’re struggling with uncertainty! 

How to remain productive with online classes:

A few tips from a broke neuro-divergent academic

Try and wake up early, and go to bed early too. I’m not saying get up at 5 (unless that’s you’re thing) but sleeping into noon is a productivity blackhole. I go for 8 or 8:30, generally, but that’s just what works for me.

Get dressed for the day. I’m not talking like, jeans and a business casual outfit, but a clean pair of sweatpants, fresh underwear, and a new shirt can really put you in the mood for a new morning.

Have a workspace. Whether it be the kitchen table, a desk, a spot on the floor with a lap desk, have a place that’s dedicated to your work. Have items that signify that workspace too, like your book, planner, laptop, lamp, whatever. It can help you get into the zone, being in that space.

Have a morning drink. I choose earl grey tea with honey and cream, but black coffee, herbal tea, lemon water, whatever works for you is awesome, as long as itll wake you up and start your day.

To do lists. To do lists and to do lists and more to do lists. I have three. One is a post it weekly planner deal (3.99 at a local grocery store). it’s a weekly spread already set up, and if you’re anything like me, its really hard to set up a weekly spread. Then I have an app called Ike. I have a daily to do list I write on that app, and then I have four more to-do lists of what I have to for each specific class.

Spread out your assignments. Don’t overwhelm yourself. If you’re professors are like mine, and have the due date for each module as Sunday at midnight. What I do is spread out all my assignments from Monday to Saturday, and I leave Sunday blank, so anything I didn’t do that week, I finish on Sunday. It works for me, it might work for you.

Have a folder for each class, and a notebook for each class. I hate spending money, I’m broke as hell, sono al verde as the Italians say, but a 0.99 cent folder and a 0.25 cent notebook can do wonders for motivating one to fill them up.

Study with a drink. Tea, water, coffee, whatever, but my go to is generally a warm drink. I cannot study if I’m cold, I get tired and groggy, so warm socks, a robe, and a hot drink really keep me going.

Take breaks. Make time for your hobbies, for something fun. Working without stopping absolutely destroys my motivation, and let me tell you, when I feel like that, an episode of Avatar and a snack gets me right back on the wagon.

Do self check ins. Does your back hurt? Are you sad? Stressed? Do you have to pee? Are you hungry? Never put your homework over your health. You won’t be able to get anything done well anyway if you’ve got those blocks.

Most importantly, get enough sleep. I beg of you. Sleep is so important, and it’s the game changer, at least to me. We as students have such an amazing opportunity to get more sleep than we ever have before during the year. Take advantage of that.

Astronomers are the funniest people on earth actually

US Elevation.

by @cstats1

Can we romanticize humble academia?? Be in love with sharing your knowledge with others. having a sheepish smile on your face as you clumsily explain a concept that you fully understand but haven’t read up on recently. Happily help someone understand a complex concept that you do understand. Roll your eyes and make funny faces at people purposely being pretentious. Give away or sell at a reasonable price old textbooks that you know are still in use. Lend and exchange notes with other genuine acedmics. Encourage others with whatever their studies/aspirations are.

Pretentiousness in academia is so outdated, and frankly off putting. Romanticize the academic practice of being kind.

told my project partner all she had to do was write the sql script following the logical schema i drew so carefully

this is what she came up with 🤦‍♀️:

where are the foreign keys, where are the semicolons, and why the hell are there STRINGs in an sql script

do i yeet her out of the window or do i yeet myself out of the window

the physics students

as requested by the wonderful @starferns

the chalkboard at the front of the lecture hall, covered in equations and graphs

visualizing a problem in your mind, step by step

cold water with ice cubes and a slice of lemon

diagrams drawn hastily on the corner of your paper, scribbled lines and half formed thoughts

replicating famous experiments and demonstrations

watching youtube videos late at night, picking apart complex theories

having an instinct for force diagrams and direction of motion

rushed, messy handwriting

finding beauty in motion and calculation and precision

seeing the universe as unimaginably small and unimaginably large at the same time

a well-worn grey sweater, frayed a little at the sleeves

equations scribbled on your arm until you know them by heart

studying newton and meitner and plank, all those who went before

talking with your hands, forming the shapes of arcs and trajectories as you work through a problem

long hallways and cold, sunny days

late night study groups

staring up at the sky, knowing exactly why and how the planets move as they do

trying einstein’s thought experiments

an old grandfather clock, pendulum measuring the passage of time

pages filled with calculations and precise strings of digits

I'm not actually smart, I just prep for a class like I'm going into battle