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Santiago
@svpino 5 years, 4 months ago 747 views

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Some of the things I've learned in more than 20 years in the tech industry.

You need to hear these.

🧵👇

Listen to more people who don't look like you, don't speak your language, and don't come from the same place you do.

We aren't doing this near enough.

Small habits compound.

No small improvement is too small.

Just aim for something new every day, and you'll be surprised at the end.

Take responsibility.

It doesn't really matter how you feel, I'm sure you could have done better.

Always keep the big picture in mind and never lose the forest for the trees.

Be the person that pulls everyone out of the rabbit holes.

Focus on the final goal, and don't worry too much about how you get there.

Great results will get you farther than processes, but good processes can help you achieve good results.

Be generous with your knowledge.

It's funny how everything you share finds a way to reward you back.

Who you are is more important than who you were.

We all make mistakes. Move on from them and focus on what's coming.

There are no stupid questions.

Ask away!

(There are, however, stupid people with fragile egos that get bothered when others ask. Ignore them.)

Change is the only thing you can always count on. (And death, and taxes, of course.)

Embrace change.

Better is not always best.

People fantasize about perfection, but perfectionism rarely wins.

Shipping more often will give you better odds than gilding the lily.

Learn to say no.

(I can't say this loud enough!)

Be gracious, professional, nice, but say it more.

Make a habit out of learning.

What you know today will be outdated tomorrow.

Make a plan to keep up and follow it... or you'll get behind.

Focus on one thing at a time.

Multi-tasking murders productivity.

(And turn your phone off!)

Job-hoping may be great for your bank account, but it does nothing to improve the impact you make in the world.

(And it looks horrible in your resume.)

Ideas are worth shit. Execution is worth everything.

Don't be the "idea person". Be the one that takes them and runs with them.

Good communication is a fundamental asset.

You can never invest too much in improving it.

(It doesn't matter how technically good you are if you can't properly communicate with others.)

More from Santiago

Santiago
@svpino

12 machine learning YouTube videos.

On libraries, algorithms, tools, and theory.

↓

1. Jupyter Notebooks: https://t.co/HqE9yt8TkB

2. Pandas: https://t.co/aOLh0dcGF5

3. Matplotlib: https://t.co/tKADpmihkh

4. Seaborn: https://t.co/s8EUxh6x1f

5. Numpy: https://t.co/pJoc0Lfjwm

6. Decision Trees: https://t.co/tKtUpO1K3l

7. Neural Networks: https://t.co/bc7emyjc9q

8. Scikit-Learn: https://t.co/LrKG7cMxRq

9. TensorFlow: https://t.co/fhO6T9sblU

10. PyTorch: https://t.co/5w9mJxijdd

11. Essense of Linear Algebra: https://t.co/o3kOnxl90i

12. Essense of Calculus: https://t.co/rfo7v0cpR4

Santiago
@svpino

A topic that comes up in every interview.

Bias, variance, and their relationship with machine learning algorithms. One of the most basic concepts that you have to know by heart.

Here is a simple summary that you will easily remember.

↓

Every machine learning algorithm deals with 3 types of errors:

1. Bias error
2. Variance error
3. Irreducible error

There's nothing we can do about #3.

Let's focus on the other two.

↓ 1/5

"Bias" refers to the assumptions the model makes to simplify the process of finding answers.

The more assumptions it makes, the more biased the model is.

"Variance" refers to how much the answers given by the model will change if we use different training data.

If the answers stay the same regardless of the data, the model has low variance.

Often, linear models are high-bias, and nonlinear models are low-bias.

Example low-bias algorithms:
• Decision Trees
• SVN
• kNN

Example high-bias algorithms:
• Linear Regression
• Logistic Regression

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Santiago
@svpino

I told everyone that I didn't care.

"Screw math! I've never been great with it, so I'm not starting with machine learning to fail at the end."

That was many years ago.

Math is still hard, but I don't think you should be scared at all. Here is why: 🧵👇

[1] One thing changed my mind: school pushed me to the deep end of the pool, and I was forced to swim.

I had to face my fears, and I started machine learning and realized that the math involved is not as scary (or as much) as some people believe.

👇

[2] Probably one of the most frequent questions I get is around the math needed for machine learning.

Answer:

▫️ Probabilities and Statistics
▫️ Linear Algebra
▫️ Calculus

But it turns out that this is not helpful.

👇

[3] What are you gonna do with this?

Are you going to learn all there's is about linear algebra before looking into machine learning?

How about probabilities and statistics? Or calculus? Do you know how extensive calculus is?

👇

[4] Many people stop looking into machine learning as soon as somebody tells them that calculus is a pre-requisite.

First of all, the amount of calculus you truly need is minuscule.

Second, without proper direction, there's no way you'll find your way through the noise.

👇

Santiago
@svpino

Some of my machine learning books.

Hands-On Machine Learning from @aureliengeron and Deep Learning with Python from @fchollet.

Santiago
@svpino

You gotta think about this one carefully!

Imagine you go to the doctor and get tested for a rare disease (only 1 in 10,000 people get it.)

The test is 99% effective in detecting both sick and healthy people.

Your test comes back positive.

Are you really sick? Explain below 👇

The most complete answer from every reply so far is from Dr. Lena. Thanks for taking the time and going through

Really doesn\u2019t fit well in a tweet. pic.twitter.com/xN0pAyniFS
— Dr. Lena Sugar \U0001f3f3\ufe0f\u200d\U0001f308\U0001f1ea\U0001f1fa\U0001f1ef\U0001f1f5 (@_jvs) February 18, 2021

You can get the answer using Bayes' theorem, but let's try to come up with it in a different —maybe more intuitive— way.

👇

Here is what we know:

- Out of 10,000 people, 1 is sick
- Out of 100 sick people, 99 test positive
- Out of 100 healthy people, 99 test negative

Assuming 1 million people take the test (including you):

- 100 of them are sick
- 999,900 of them are healthy

👇

Let's now test both groups, starting with the 100 people sick:

▫️ 99 of them will be diagnosed (correctly) as sick (99%)

▫️ 1 of them is going to be diagnosed (incorrectly) as healthy (1%)

👇

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Matt Wallace
@MattFnWallace

Hey, who wants to read a story about @Upwork fucking over freelancers in order to upsell their clients on unnecessary services the clients don't want and can't afford? Strap in!

So after my marketing agency closed I started freelancing again. A marketing company that wanted to work with me only hires freelance writers through @Upwork. So I signed up. I wasn't thrilled about it, but that's who they contract with and it's their marketing company.

I've been receiving regular assignments from this company, thru @Upwork, for over a month now. I've written dozens of articles for them. My work has been exemplary. I've been handling repeated rush jobs and delivering. The client was and is very happy. That's coming from them.

While I was wrapping up several assignments this week I was contacted by the marketing company. They asked if I had taken a new full-time job and wasn't available anymore. It seems @Upwork's talent group told them I was no longer available to take assignments.

I was very surprised. Nothing had changed on my end. I still needed the freelance work very much. I told them so. So the marketing company pressed @Upwork and were told there were "compliance" issues that were preventing the marketing company from giving me any more work.

foone
@Foone

I went looking for a remote-controlled power switch (the wireless christmas kind, not the modern IoT kind) and didn't find it, but I did find this thing I bought just to figure out why it exists.
It's a timer outlet, but you program it from your phone... but it's not wireless.

Yeah instead it plugs into your phone's HEADPHONE PORT

I got it on sale.
probably because iphone dropped the headphone port and they had to get with the 21st century and make it bluetooth

So inside the box is the device. it's got a little 2-prong polarized outlet with no ground.

on top is the only controls: on/off/timer.

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foone
@Foone

you know how Atari called the Jaguar as a "64bit system", because it had two 32bit CPUs? (or because it had a 64bit bus, but let's not worry about that)
we should apply that logic to the current generation of consoles.
So the Switch is a 256bit console. It's the Nintendo 256.

The Xbox Series X? terrible name.
Better call it the "Xbox 512 Blu-ray".
like the Jaguar CD, the Sega CD... the good old days when consoles had their media type in the name.

Boringly the PS5 is also a Playstation 512 Blu-ray, because both of them are using the same AMD Zen 2 CPU.

The Switch one is weeeird. It's built on an Nvidia Tegra X1, which is an 8 core 64-bit CPU, so that should be 512, right?

Well... no. Four of them can't be used. And later documentation doesn't even mention them.

it's some weird system where the system-on-a-chip has four Cortex-A57 cores and four Cortex-A53 cores but only the A57s are usable?

Brad Kaellner - Stock ...
@bkaellner

Incumbents almost always prevail with sustaining innovation

In disruptive circumstances, the entrants are likely to beat the incumbents

H/t Clayton Christensen, The Innovator’s Solution

foone
@Foone

argh chrome updated and it seems they've intentionally broken custom search engines. I have had a keyword search for "foone" which searches my own twitter, so I just type "foone BLAH" and it gives me a twitter search for when I said BLAH, right?

but now I get that option in the titlebar of "search twitter self-search" which is the name of the search"
if I just type "foone blah" now...

it ignores the search I have had defined for years and just googles it.

and this is definitely on purpose because they didn't just break it, they changed it. it's now "fooneblah"

there doesn't seem to be an option to make this stop and get the old behavior back :(

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Khatvaanga
@khatvaanga

Starting my 2nd thread on Sringeri Parampara. This will cover the Jagadgurus after Sri Vidyaranya to Sri Shivabhinava Nrisimha Bharati.

It is really very tough to match the brilliance and achievements of Vidyaranya. After whom came 15 - Chandrashekara Bharati [1386-1389].

The next Acharya was Nrisimha Bharati [1389-1408]. Harihara raya found a town for this Acharya - Narasimhapuram. Acharya helped the king by guiding him in political affairs. He also initiated the kind with mahamantras for spiritual development.

Subsequent Acharyas were
15-Puroshottama Bharati [1408 - 1448]
16-Shankara Bharati[1448 - 1455]
17-Chandrasekhara Bharati II [1455 - 1464]
18- Nrisimha Bharati II [1464 - 1479]
19-Puroshottama Bharati II [1479 - 1517]

20-Ramachandra Bharati [1517 - 1560]. Sadashiva Raya was emporer of Vijayanagara during this time.
21-Nrisimha Bharati III [1560 - 1573]
22-Nrisimha Bharati IV [1573 - 1576]
23-Nrisimha Bharati V [1576 - 1600]

24-Abhinava Nrisimha Bharati [1600-1623]. When he visited Malahanikareswara temple for first time he noticed there was no Vinayaka there so he took piece of turmeric and drew outline of Ganesha on a pillar and offered puja.

Jaya_Upadhyaya
@Jayalko1

SRI BANKEY BIHARI JI, VRINDAVAN (UP)

Very famous Krishna Mandir where Bankey Bihari Ji is worshipped and looked after as a child.
Bankey means “Bent at three places”.
Thakur Ji was worshipped in Nidhivan till 1863. This mandir was constructed in 1864 by Goswamis.
@LostTemple7

Legend says that Swami Haridas used to worship Krishna in Nidhivan.
Once, his curious disciples entered the forest but they were almost blinded by bright, intense light. Upon knowing this, Swamiji himself went there and after his requests, Krishna appeared with his consort.

Krishna, then, left back this black charming murti,which we see now, before disappearing.
A curtain is drawn before the murti after every 15-30 second. It is said that if one stares long enough into the eyes of Shri Banke Bihari, the person would lose his self consciousness.

Bankey Bihari Ji sports a flute only once a year on the eve of Sharad Purnima.
Darshan of His lotus feet can be done only on Akshay Tritiya every year.
There are no loud bells here and
no early morning Darshan can be done so that child Krishna’s sleep is not disturbed.

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Jaya_Upadhyaya
@Jayalko1

SRI SWETHA VINAYAGAR, THIRUVALANCHUZHI, KUMBAKONAM
(TN)
#bharatmandir

While main deity is Shiva as Kapartheeswarar, the kshetram is famous for Ganesha, known as Swetha/Vellai Vinayagar (white Vinayak)

During samudra manthan, Vasuki snake (used as rope) started spewing venom.

Unable to bear the intense heat, Devas rushed to Siva. He told them that this was because the task was started without getting Ganesha’s approval.
So the Devas created a Ganesha murti from white sea foam and worshipped it.
It was later taken by Indra to Indralok.
@GunduHuDuGa

But once Indra had to come to Earth to pray to Shiva to seek relief from a curse inflicted on him. So he brought the murti of Ganesha with him. When he came here, he wanted to take bath before puja. So he gave the murti to a boy to hold for sometime. The boy was actually Shiva.

He kept the murti down and vanished. Indra could not lift it again and a divine voice told him to let Vinayagar stay there and visit every Ganesh Chaturthi to pray.
Since Vinayagar is made of foam, no abhishekam is done here. Only punugu is applied n camphor powder is sprinkled

Jaya_Upadhyaya
@Jayalko1

JWALAMUKHI TRIPURASUNDARI, UTHANAHALLI, MYSURU (KAR)
#bharatmandir

Jwalamukhi Tripursundari is believed to be the sister of Devi Chamundeshwari, the presiding deity of Mysuru
It is also that she represents the flaming mouth of Jalandhara, the demon whom Shiva crushed to death.

When Devi Chamundeswari was fighting Mahishasura, she observed that from every drop of blood that spilled out of Mahishasura, another demon was born. So she created Tripurasundari to ensure that no blood dripped from Mahishasura.

Tripura Sundari means beauty of the three worlds.
The murti was installed during Wodeyar rule. An utsava murti made of pancha loha is kept in the sanctum sanctorum.
Another shrine here is dedicated to Siddeshwara / Shiva surrounded by a beautiful wooden Mantapa.
@GunduHuDuGa

Conservative Trader
@AnandableAnand

How to get rich trading (without getting lucky)

Complete beginner’s guide to wealth of Rs 10 Cr in 10 years

Step 1: start trading live

1/n

Nothing can substitute experience of live trading

No amount of back-test, studies or indicators can substitute training your mind with screen time

As a beginner, In live trading, you will make losses almost everyday

2/n

So here are the conditions which you can’t violate in first year
If you can’t follow these rules, this document is not for you

Start with trading capital of Rs 1 lakhs

Max loss per trade 0.25%, i.e. 250 Rs

Max loss for the day, 1%, i.e. Rs 1000

Max 6 trades in a day

3/n

I know, these conditions will cripple you in terms of what all you can trade and how

But just like any start up, trading is also about making it through initial gruelling constraints of life

You will also learn, how to turn these adverse rules to your advantage

4/n

Btw, you can sell directional banknifty options, obviously you can buy options, can do cash stock trading and much more under these conditions

Think about it, you will be do all kinds of instruments, just that PNL will not be roller coaster ride or exciting like a casino

5/n