Posts by Category

Algorithm

Local Search

6 minute read

2020-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์•Œ๊ณ ๋ฆฌ์ฆ˜โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Branch and Bound

5 minute read

2020-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์•Œ๊ณ ๋ฆฌ์ฆ˜โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Modern Algebra1

Modern Algebra I - PS3

5 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ˜„๋Œ€๋Œ€์ˆ˜1โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Modern Algebra I - PS2

3 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ˜„๋Œ€๋Œ€์ˆ˜1โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Modern Algebra I - PS1

5 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ˜„๋Œ€๋Œ€์ˆ˜1โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Polynomial over UFD

6 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ˜„๋Œ€๋Œ€์ˆ˜1โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Gaussian Integer

11 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ˜„๋Œ€๋Œ€์ˆ˜1โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Kubernetes

Install Knative Serving

11 minute read

์ขŒ์ถฉ์šฐ๋Œ! Knative ์„ค์น˜ ์ˆ˜๋‚œ๊ธฐ. Istio๋ฅผ ๋„คํŠธ์›Œํ‚น ๋ฐฑ์—”๋“œ๋กœ ์‚ฌ์šฉํ•˜๋Š” Knative โ›ต๏ธ

Istio Virtual Machine Architecture

6 minute read

non-kubernetes ์›Œํฌ๋กœ๋“œ๋ฅผ Istio ์„œ๋น„์Šค ๋ฉ”์‰ฌ์— ์ถ”๊ฐ€ํ•˜๋Š” ๋ฐฉ๋ฒ•. WorkloadEntry์™€ WorkloadGroup์œผ๋กœ VM ์›Œํฌ๋กœ๋“œ ๊ด€๋ฆฌํ•˜๊ธฐ! ๐Ÿค

Istio Circuit Breaking

4 minute read

Circuit Breaker๋กœ ๋ฌธ์ œ ์žˆ๋Š” ์›Œํฌ๋กœ๋“œ๋ฅผ ์ œ์™ธ์‹œํ‚ค๊ธฐ ๐Ÿšง

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Develop

Istio Certified Associate ์‹œํ—˜ ํ›„๊ธฐ โญ๏ธ

13 minute read

2024๋…„์˜ ์ฒซ ์ž๊ฒฉ์ฆ์œผ๋กœ ๋„์ „ํ•œ Istio ์ž๊ฒฉ์ฆ!! ๊ทธ๋ฆฌ๊ณ  K8s ์—”์ง€๋‹ˆ์–ด๋กœ ์„ฑ์žฅํ•œ ๋‚˜์˜ ์ด์•ผ๊ธฐ โ›ต๏ธ

2023 AWS re:invent ์‹ ๊ธฐ์ˆ  ์ •๋ฆฌ

16 minute read

์ง์ ‘ ๋‹ค๋…€์˜จ ๐ŸŽฐ 2023 AWS re:invent์—์„œ ์†Œ๊ฐœ๋œ ์‹ ๊ธฐ์ˆ ๊ณผ ์‹ ๊ธฐ๋Šฅ ์ •๋ฆฌ ๋ฐ ์†Œ๊ฐœ!

Swarmpit ํด๋Ÿฌ์Šคํ„ฐ ๊ตฌ์ถ•๊ธฐ

10 minute read

Docker์—์„œ ์ œ๊ณตํ•˜๋Š” ์ปจํ…Œ์ด๋„ˆ ์˜ค์ผ€์ŠคํŠธ๋ ˆ์ด์…˜ ๊ธฐ๋Šฅ์ธ Docker Swarm, ๊ทธ๋ฆฌ๊ณ  Swarm Cluster๋ฅผ ๊ด€๋ฆฌํ•˜๋Š” Web UI์ธ Swarmpit์„ ์‚ฌ์šฉํ•ด๋ณด๊ณ  ์‹คํ—˜ํ•ด๋ณธ ๊ฑธ ์ •๋ฆฌํ•ด๋ณด์•˜๋‹ค.

AWS Amazon Linux 2 ๊ฐœ๋ฐœ ์…‹์—…

5 minute read

์ด ๊ธ€์€ ์ •๋ฆฌ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ž‘์„ฑ๋œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

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Applied Statsitcs

Density Estimation

6 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜๋ฐ์ดํ„ฐ ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Model-based Clustering

7 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Clustering

5 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

PCA

7 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Bagging & Random Forest

8 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Statistics

Degree of Freedom in Statistics

7 minute read

ํ†ต๊ณ„ํ•™์—์„œ ์ž์œ ๋„(Degree of Freedom)๋ž€ ๋ฌด์—‡์ธ๊ฐ€? ์™œ ๋ณดํ†ต ์ž์œ ๋„๋กœ $(n-1)$ ๊ฐ’์„ ์“ฐ๋Š”๊ฐ€?

Prediction on Regression

6 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Statistics - PS3

8 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Test on Regression

5 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Statistics - PS2

3 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

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Differential Equations

Banach Space

8 minute read

์™„๋น„์„ฑ(Completeness)์™€ ํž๋ฒ ๋ฅดํŠธ ๊ณต๊ฐ„, ๊ทธ๋ฆฌ๊ณ  ๋ฐ”๋‚˜ํ ๊ณต๊ฐ„์— ๋Œ€ํ•ด

Picard Iteration

10 minute read

$Xโ€™ = F(X)$์˜ ํ•ด๊ฐ€ ์กด์žฌํ•˜๊ณ  ์œ ์ผํ•จ์„ ๋ณด์ด๋Š” ๊ณผ์ •.

Lipschitz Constant

2 minute read

ํ•จ์ˆ˜ ๊ธฐ์šธ๊ธฐ์— ์ƒํ•œ(supreme)์ด ์žˆ๋Š” ํ•จ์ˆ˜๋“ค์— ๋Œ€ํ•ด

Gronwallโ€™s Inequality

6 minute read

๋ฏธ๋ถ„๋ฐฉ์ •์‹์—์„œ ๋งŒ๋‚˜๋Š” ๋ถ€๋“ฑ์‹. ๊ฐ„๋‹จํ•˜์ง€๋งŒ ๊ฐ•๋ ฅํ•œ ๋„๊ตฌ!!

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Calculus

๋ฏธ์ ๋ถ„ํ•™์„ ๋‹ค์‹œ ๊ณต๋ถ€ํ•˜๋ฉฐ ๋“  ์ƒ๊ฐ๋“ค

8 minute read

์ปด๊ณต๊ณผ ํ•™์ƒ์ด ์ˆ˜ํ•™๊ณผ ์กธ์—…์‹œํ—˜์„ ์œ„ํ•ด ๊ณ ๊ตฐ๋ถ„ํˆฌ ํ•˜๋Š” ์ฒซ๋ฒˆ์งธ ์ด์•ผ๊ธฐ. ๊ทธ๋ž˜๋„ ๋ณตํ•™ ํ•˜๊ธฐ ์ „์— ๋ฏธ์ ๋ถ„ํ•™์€ ๋๋ƒˆ๋‹ค๋Š” ๊ฐ๋™์ ์ธ ์ด์•ผ๊ธฐ ๐Ÿฅบ

Divergence Theorem

2 minute read

๋ฐœ์‚ฐ์— ๋Œ€ํ•œ ๋ถ€ํ”ผ ์ ๋ถ„์€, ๊ฒฝ๊ณ„ ๊ณก๋ฉด์— ๋Œ€ํ•œ ๋ฉด์ ๋ถ„๊ณผ ๊ฐ™๋‹ค๋Š” ์ •๋ฆฌ.

Stokesโ€™ Theorem

4 minute read

ํšŒ์ „(curl)์— ๋Œ€ํ•œ ๊ธฐ๋ณธ์ •๋ฆฌ. ์—ด๋ฆฐ ๊ณก๋ฉด์—์„œ์˜ curl ๋ฒกํ„ฐ์˜ ๋ฉด์ ๋ถ„์€ ๊ฒฝ๊ณ„ ๊ณก์„ ์˜ ์„ ์ ๋ถ„๊ณผ ๊ฐ™๊ณ , ๋‹ซํžŒ ๊ณก๋ฉด์—์„œ์˜ curl ๋ฒกํ„ฐ์˜ ๋ฉด์ ๋ถ„์˜ ๊ฒฐ๊ณผ๋Š” ํ•ญ์ƒ 0์ด๋‹ค! ๐ŸŒ€

Parametric Surface, and Surface Integral

6 minute read

3์ฐจ์›์—์„œ ๊ณก๋ฉด์„ ์ •์˜ํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด. ๊ณก๋ฉด์˜ ๋ฐฉํ–ฅ์„ ์ •์˜ํ•˜๋Š” ๋ฐฉ๋ฒ•๊ณผ ์ •์˜ํ•œ ๊ณก๋ฉด์„ ์Šค์นผ๋ผ์žฅ๊ณผ ๋ฒกํ„ฐ์žฅ์—์„œ ์ ๋ถ„ํ•˜๋Š” ๊ณก๋ฉด ์ ๋ถ„์— ๋Œ€ํ•ด. ๐ŸŒ

Divergence and Curl

20 minute read

๋ฒกํ„ฐ์žฅ์„ ํ๋ฅด๋Š” ์œ ์ฒด๋กœ ๋ณด๊ณ , ํ•œ ์ ์— ๋Œ€ํ•ด ์œ ์ฒด๊ฐ€ ํŒฝ์ฐฝ or ์••์ถ• ํ•˜๋Š”์ง€, ์•„๋‹ˆ๋ฉด ํ•œ ์ ์„ ์ฃผ๋ณ€์œผ๋กœ ์œ ์ฒด๊ฐ€ ์–ผ๋งˆ๋‚˜ ๋น ๋ฅด๊ฒŒ ํšŒ์ „ํ•˜๋Š”์ง€๋ฅผ ์ •์˜ํ•œ ๋‘ ์ง€ํ‘œ. ์˜์—ญ ๋‚ด๋ถ€์˜ ํšŒ์ „(circulation)๊ณผ ์œ ์ถœ(flux)์„ ๊ทธ๋ฆฐ ์ •๋ฆฌ์˜ ์„ ์ ๋ถ„์œผ๋กœ ๊ณ„์‚ฐํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด์„œ ๐ŸŒŠ

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Probability

Negative Binomial Theorem

5 minute read

์กฐํ•ฉ์— ์Œ์ˆ˜ $n$์ด ๋“ค์–ด๊ฐ„ $\binom{-n}{k}$๋ฅผ ์–ด๋–ป๊ฒŒ ์ •์˜ํ• ๊นŒ?

Momemtum Generating Function

14 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Transformations of Random Variable - 2

6 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Transformations of Random Variable - 1

17 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Weibull Distribution (Optional)

5 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

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Istio

Istio Certified Associate ์‹œํ—˜ ํ›„๊ธฐ โญ๏ธ

13 minute read

2024๋…„์˜ ์ฒซ ์ž๊ฒฉ์ฆ์œผ๋กœ ๋„์ „ํ•œ Istio ์ž๊ฒฉ์ฆ!! ๊ทธ๋ฆฌ๊ณ  K8s ์—”์ง€๋‹ˆ์–ด๋กœ ์„ฑ์žฅํ•œ ๋‚˜์˜ ์ด์•ผ๊ธฐ โ›ต๏ธ

Istio Virtual Machine Architecture

6 minute read

non-kubernetes ์›Œํฌ๋กœ๋“œ๋ฅผ Istio ์„œ๋น„์Šค ๋ฉ”์‰ฌ์— ์ถ”๊ฐ€ํ•˜๋Š” ๋ฐฉ๋ฒ•. WorkloadEntry์™€ WorkloadGroup์œผ๋กœ VM ์›Œํฌ๋กœ๋“œ ๊ด€๋ฆฌํ•˜๊ธฐ! ๐Ÿค

Istio Circuit Breaking

4 minute read

Circuit Breaker๋กœ ๋ฌธ์ œ ์žˆ๋Š” ์›Œํฌ๋กœ๋“œ๋ฅผ ์ œ์™ธ์‹œํ‚ค๊ธฐ ๐Ÿšง

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Machine Learning

Gaussian Process Regression

8 minute read

โ€œMachine Learningโ€์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Bayesian Regression

5 minute read

โ€œMachine Learningโ€์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Predictive Distribution

8 minute read

โ€œMachine Learningโ€์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Machine Learning Basics

1 minute read

โ€œMachine Learningโ€์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

MLE vs. MAP

4 minute read

โ€œMachine Learningโ€์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Complex Variable

Extended Cauchyโ€™s Integral Formula

11 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์‘์šฉ๋ณต์†Œํ•จ์ˆ˜๋ก โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Cauchyโ€™s Integral Formula

11 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์‘์šฉ๋ณต์†Œํ•จ์ˆ˜๋ก โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Cauchy-Goursat Theorem

3 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์‘์šฉ๋ณต์†Œํ•จ์ˆ˜๋ก โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

complex primitive function & ML-inequality

3 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์‘์šฉ๋ณต์†Œํ•จ์ˆ˜๋ก โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Contour Integrals

4 minute read

2020-2ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์‘์šฉ๋ณต์†Œํ•จ์ˆ˜๋ก โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Time Series Analysis

Moving-Average Model

3 minute read

์˜ค์ฐจ๋กœ ๋ฏธ๋ž˜๋ฅผ ์˜ˆ์ธกํ•œ๋‹ค

Auto-Regressive Model

4 minute read

๊ณผ๊ฑฐ๊ฐ€ ๋ฏธ๋ž˜๋ฅผ ์˜ˆ์ธกํ•œ๋‹ค

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Computer Vision

SVM; Support Vector Machine

12 minute read

๋ณธ ๊ธ€์€ 2020-2ํ•™๊ธฐ โ€œ์ปดํ“จํ„ฐ ๋น„์ „โ€ ์ˆ˜์—…์˜ ๋‚ด์šฉ์„ ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

YOLO: You Only Look Once

3 minute read

์ด ๊ธ€์€ ์ œ๊ฐ€ ใ€ŽYOLO: You Only Look Onceใ€๋ฅผ ๊ณต๋ถ€ํ•˜๋ฉด์„œ, ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

CenterNet ์‹ค์Šต (Windows)

4 minute read

์ด ๊ธ€์€ ์ œ๊ฐ€ ใ€ŽCenterNet: Objects as Pointsใ€์˜ ์ฝ”๋“œ๋ฅผ ์ง์ ‘ ์‹ค์Šตํ•ด๋ณธ ๊ณผ์ •์„ ๊ธฐ๋กํ•œ ํฌ์ŠคํŠธ ์ž…๋‹ˆ๋‹ค.

SphereNet(2018)

12 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

Anti-Aliasing

3 minute read

์ด ๊ธ€์€ ์ •๋ฆฌ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ž‘์„ฑ๋œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

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Spark

Spark Jobs, Stages and Tasks

7 minute read

Spark๊ฐ€ Lazy Evaluation์„ ์ฒ˜๋ฆฌํ•˜๋Š” ๊ณผ์ •. Narrow Transformation๊ณผ Wide Transformation. RDD Partition๊ณผ Spark Task์— ๋Œ€ํ•ด.

Spark Speculative Execution

3 minute read

Spark์—์„œ ๋Š๋ฆฐ ์ž‘์—…์„ ์ฒ˜๋ฆฌํ•˜๊ธฐ ์œ„ํ•œ ๊ธฐ๋ฒ•. ๋Š๋ฆฌ๊ฒŒ ์‹คํ–‰๋˜๋Š” ์ž‘์—…์„ ๊ฑด๊ฐ•ํ•œ ์›Œ์ปค ๋…ธ๋“œ์— ๋ณต์ œํ•˜์—ฌ ์‹คํ–‰ํ•˜๋Š” ๊ธฐ๋ฒ•.

Spark Kryo Serializer

1 minute read

Spark์˜ ์ง๋ ฌํ™”, ๊ทธ๋ฆฌ๊ณ  ์ง๋ ฌํ™” ์„ฑ๋Šฅ์„ ์˜ฌ๋ ค์ฃผ๋Š” Kryo Serializer ์‚ฌ์šฉํ•˜๊ธฐ.

Spark Adaptive Query Execution

11 minute read

Spark 3์˜ ํ•ต์‹ฌ ๊ธฐ๋Šฅ์ด AQE์— ๋Œ€ํ•ด ์‚ดํŽด๋ณด์ž.

Jump into Spark Sessions and Contexts

11 minute read

Spark Session์ด๋ž€ ๋ฌด์—‡์ธ๊ฐ€? Spark Session์— ๋“ค์–ด์žˆ๋Š”, SparkContext, SQLContext ๋“ฑ์— ๋Œ€ํ•ด ๐ŸŽ‡

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Problem Solving

Bitmask Technique

8 minute read

์ด๋ฒˆ ํฌ์ŠคํŠธ๋Š” PS ํ…Œํฌ๋‹‰ ์ค‘ ํ•˜๋‚˜์ธ ๋น„ํŠธ๋งˆ์Šคํฌ(Bitmask) ๊ธฐ๋ฒ•์„ ๋‹ค๋ฃน๋‹ˆ๋‹ค. Bitmask ๊ธฐ๋ฒ•์€ ์ด์ง„์ˆ˜(bit)์™€ ์ด์ง„์ˆ˜ ์—ฐ์‚ฐ(bitwise operation)์„ ํ™œ์šฉํ•ด ์—ฐ์‚ฐ์—์„œ ํฐ ์ด๋“์„ ์ œ๊ณตํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๊ณ ๊ธ‰ PS๋ฅผ ์œ„ํ•ด์„œ๋Š” ๊ผญ ์ตํ˜€์•ผ ํ•˜๋Š” ๊ธฐ๋ฒ•์ž…๋‹ˆ๋‹ค.

์ฟผ๋“œ ํŠธ๋ฆฌ ๋’ค์ง‘๊ธฐ

7 minute read

โ€˜์•Œ๊ณ ๋ฆฌ์ฆ˜ ๋ฌธ์ œํ•ด๊ฒฐ ์ „๋žตโ€™์„ ์ฝ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Statistics - PS3

8 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Statistics - PS2

3 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

Statistics - PS1

6 minute read

โ€œํ™•๋ฅ ๊ณผ ํ†ต๊ณ„(MATH230)โ€ ์ˆ˜์—…์—์„œ ๋ฐฐ์šด ๊ฒƒ๊ณผ ๊ณต๋ถ€ํ•œ ๊ฒƒ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ „์ฒด ํฌ์ŠคํŠธ๋Š” Probability and Statistics์—์„œ ํ™•์ธํ•˜์‹ค ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค ๐ŸŽฒ

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Philosophy

Leibnizโ€™s Law: Identity of Indiscernibles

2 minute read

๋ณธ ๊ธ€์€ 2020-1ํ•™๊ธฐ ํฌํ•ญ๊ณต๋Œ€ ์ด์ถฉํ˜• ๊ต์ˆ˜๋‹˜์˜ โ€˜์‹œ๊ณต๊ฐ„๊ณผ ๋ฌผ์งˆ์˜ ์ฒ ํ•™โ€™ ์ˆ˜์—…์˜ ์ฝ๊ธฐ์ž๋ฃŒ์˜ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๋ฌผ๋ฆฌํ•™๋„๋Š” ์•„๋‹ˆ์ง€๋งŒ ์ˆ˜์—…์˜ ๋ณธ์งˆ์— ๋‹ค๊ฐ€๊ฐ€๊ณ ์ž ์ด๋ ‡๊ฒŒ ๋ฌธ์„œํ˜•ํƒœ๋กœ ์ •๋ฆฌํ•ด๋‘ก๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Wasserman, Metaphysical Puzzles

18 minute read

๋ณธ ๊ธ€์€ 2020-1ํ•™๊ธฐ ํฌํ•ญ๊ณต๋Œ€ ์ด์ถฉํ˜• ๊ต์ˆ˜๋‹˜์˜ โ€˜์‹œ๊ณต๊ฐ„๊ณผ ๋ฌผ์งˆ์˜ ์ฒ ํ•™โ€™ ์ˆ˜์—…์˜ ์ฝ๊ธฐ์ž๋ฃŒ์˜ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๋ฌผ๋ฆฌํ•™๋„๋Š” ์•„๋‹ˆ์ง€๋งŒ ์ˆ˜์—…์˜ ๋ณธ์งˆ์— ๋‹ค๊ฐ€๊ฐ€๊ณ ์ž ์ด๋ ‡๊ฒŒ ๋ฌธ์„œํ˜•ํƒœ๋กœ ์ •๋ฆฌํ•ด๋‘ก๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Background for discussion of โ€˜Special Relativityโ€™

10 minute read

๋ณธ ๊ธ€์€ 2020-1ํ•™๊ธฐ ํฌํ•ญ๊ณต๋Œ€ ์ด์ถฉํ˜• ๊ต์ˆ˜๋‹˜์˜ โ€˜์‹œ๊ณต๊ฐ„๊ณผ ๋ฌผ์งˆ์˜ ์ฒ ํ•™โ€™ ์ˆ˜์—…์˜ ์ฝ๊ธฐ์ž๋ฃŒ์˜ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๋ฌผ๋ฆฌํ•™๋„๋Š” ์•„๋‹ˆ์ง€๋งŒ ์ˆ˜์—…์˜ ๋ณธ์งˆ์— ๋‹ค๊ฐ€๊ฐ€๊ณ ์ž ์ด๋ ‡๊ฒŒ ๋ฌธ์„œํ˜•ํƒœ๋กœ ์ •๋ฆฌํ•ด๋‘ก๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Maudlin, Classical Accounts Of Space And Time

11 minute read

๋ณธ ๊ธ€์€ 2020-1ํ•™๊ธฐ ํฌํ•ญ๊ณต๋Œ€ ์ด์ถฉํ˜• ๊ต์ˆ˜๋‹˜์˜ โ€˜์‹œ๊ณต๊ฐ„๊ณผ ๋ฌผ์งˆ์˜ ์ฒ ํ•™โ€™ ์ˆ˜์—…์˜ ์ฝ๊ธฐ์ž๋ฃŒ์˜ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๋ฌผ๋ฆฌํ•™๋„๋Š” ์•„๋‹ˆ์ง€๋งŒ ์ˆ˜์—…์˜ ๋ณธ์งˆ์— ๋‹ค๊ฐ€๊ฐ€๊ณ ์ž ์ด๋ ‡๊ฒŒ ๋ฌธ์„œํ˜•ํƒœ๋กœ ์ •๋ฆฌํ•ด๋‘ก๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Bigelow and Pargetter, Doctrine of Change

11 minute read

๋ณธ ๊ธ€์€ 2020-1ํ•™๊ธฐ ํฌํ•ญ๊ณต๋Œ€ ์ด์ถฉํ˜• ๊ต์ˆ˜๋‹˜์˜ โ€˜์‹œ๊ณต๊ฐ„๊ณผ ๋ฌผ์งˆ์˜ ์ฒ ํ•™โ€™ ์ˆ˜์—…์˜ ์ฝ๊ธฐ์ž๋ฃŒ์˜ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๋ฌผ๋ฆฌํ•™๋„๋Š” ์•„๋‹ˆ์ง€๋งŒ ์ˆ˜์—…์˜ ๋ณธ์งˆ์— ๋‹ค๊ฐ€๊ฐ€๊ณ ์ž ์ด๋ ‡๊ฒŒ ๋ฌธ์„œํ˜•ํƒœ๋กœ ์ •๋ฆฌํ•ด๋‘ก๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Deep Learning

RNN & LSTM

6 minute read

2020-2ํ•™๊ธฐ โ€œ์—ฐ๊ตฌ์ฐธ์—ฌ(CSED339A)โ€์—์„œ ์ง„ํ–‰ํ•œ โ€œStanford CS231โ€ ์Šคํ„ฐ๋””์—์„œ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

mmdetection + CPU

3 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

Transformer(2017) - 3

2 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

Transformer(2017) - 2

3 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

Transformer(2017) - 1

7 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

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Linear Algebra

Generalized Eigen Values

11 minute read

์ค‘๊ทผ์ธ ๊ณ ์œ ๊ฐ’์ด ์žˆ์„ ๋•Œ, ๊ทธ๊ฒƒ์˜ ๊ณ ์œ ๋ฒกํ„ฐ๋ฅผ ๊ตฌํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด์„œ

Supp-1: Linear Algebra - 4

11 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Supp-1: Linear Algebra - 3

7 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Supp-1: Linear Algebra - 2

7 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜ํ†ต๊ณ„์  ๋ฐ์ดํ„ฐ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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NestJS

TypeORM - DB Relationship

5 minute read

NestJS๋ฅผ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

NestJS: Mocking & Spy

11 minute read

๋ณธ ๊ธ€์€ ์ œ๊ฐ€ NestJS ํ”„๋ ˆ์ž„์›Œํฌ๋ฅผ ํ†ตํ•ด ๊ฐœ๋ฐœํ•˜๋ฉด์„œ ๊นจ๋‹ฌ์€ ๋…ธํ•˜์šฐ๋ฅผ ๊ธฐ๋กํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ œ๊ฐ€ ์ œ์‹œํ•œ ๋ฐฉ๋ฒ•๋ณด๋‹ค ๋” ์ข‹์€ ๋ฐฉ๋ฒ•์ด ์žˆ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Dependency Injection

7 minute read

๋ณธ ๊ธ€์€ ์ œ๊ฐ€ NestJS ํ”„๋ ˆ์ž„ ์›Œํฌ๋ฅผ ํ†ตํ•ด ๊ฐœ๋ฐœํ•˜๋ฉด์„œ ๊นจ๋‹ฌ์€ ๋…ธํ•˜์šฐ๋ฅผ ๊ธฐ๋กํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ œ๊ฐ€ ์ œ์‹œํ•œ ๋ฐฉ๋ฒ•๋ณด๋‹ค ๋” ์ข‹์€ ๋ฐฉ๋ฒ•์ด ์žˆ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

How to save JSON array in MySQL with TypeORM

8 minute read

๋ณธ ๊ธ€์€ ์ œ๊ฐ€ NestJS ํ”„๋ ˆ์ž„ ์›Œํฌ๋ฅผ ํ†ตํ•ด ๊ฐœ๋ฐœํ•˜๋ฉด์„œ ๊นจ๋‹ฌ์€ ๋…ธํ•˜์šฐ๋ฅผ ๊ธฐ๋กํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ œ๊ฐ€ ์ œ์‹œํ•œ ๋ฐฉ๋ฒ•๋ณด๋‹ค ๋” ์ข‹์€ ๋ฐฉ๋ฒ•์ด ์žˆ์„ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Life

2024๋…„ ๋ชฉํ‘œ

1 minute read

(๋น ๋ฐค!) ์ „์—ญ์˜ ํ•ด๊ฐ€ ๋ฐ์•˜์Šต๋‹ˆ๋‹ค ๐ŸŒž

2023๋…„ ๋ชฉํ‘œ

1 minute read

2022๋…„์— ์ด์–ด ์˜ฌํ•ด๋„ ๋ชฉํ‘œ๋ฅผ ์„ธ์›Œ๋ด…๋‹ˆ๋‹ค. ์ด๋ฒˆ ๋…„๋„์—๋„ ๋งŽ์€ ๊ฑธ ์ด๋ฃจ๊ณ  ๋” ์„ฑ์žฅํ•  ์ˆ˜ ์žˆ๊ธธ ๐Ÿ™

2022๋…„ ๋ชฉํ‘œ

2 minute read

2021๋…„์— ์ด์–ด ์˜ฌํ•ด๋„ ๋ชฉํ‘œ๋ฅผ ์„ธ์›Œ๋ด…๋‹ˆ๋‹ค. ์ด๋ฒˆ ๋…„๋„์—๋„ ๋งŽ์€ ๊ฑธ ์ด๋ฃจ๊ณ  ๋” ์„ฑ์žฅํ•  ์ˆ˜ ์žˆ๊ธธ ๐Ÿ™

2021๋…„ ๋ชฉํ‘œ

2 minute read

์†Œ์†Œํ•˜๊ฒŒ ์ด๋ฒˆ ๋…„๋„ ๋ชฉํ‘œ๋ฅผ ์ •๋ฆฌํ•ด์„œ ์ ์–ด๋ด…๋‹ˆ๋‹ค ใ…Žใ…Ž ์ด๋ฒˆ ๋…„๋„๊ฐ€ ๋‹ค ์ง€๋‚ฌ์„ ๋•Œ, ์–ผ๋งˆ๋งŒํผ ์ด๋ค˜์„์ง€ ๊ธฐ๋Œ€๊ฐ€ ๋ฉ๋‹ˆ๋‹ค ใ…Žใ…Ž

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Operating System

Stack Frame

11 minute read

ํ•จ์ˆ˜ ํ˜ธ์ถœ์ด ํ˜ธ์ถœ๋˜๋Š” ๊ณผ์ • ์‚ดํŽด๋ณด๊ธฐ. SP, BP, LP(IP) ๋ ˆ์ง€์Šคํ„ฐ๋“ค์˜ ๊ฐ’์ด ์–ด๋–ป๊ฒŒ ๋ณ€๊ฒฝ๋˜๊ณ , ๋ณต๊ตฌ๋˜๋Š”์ง€ ๊ทธ ์›๋ฆฌ์— ๋Œ€ํ•ด.

Hello, pthread!

10 minute read

C์—์„œ ์ง€์›ํ•˜๋Š” POSIX thread ์ฒดํ—˜๊ธฐ.

Unix and Linux

10 minute read

์šด์˜์ฒด์ œ์˜ ๊ณ„๋ณด ๐ŸŒณ ์šด์˜์ฒด์ œ ์ˆ˜์—…์„ ์ดํ•ดํ•˜๊ธฐ ์œ„ํ•œ ์ฒซ๊ฑธ์Œ.

Introduction to Makefile

7 minute read

Makefile๋กœ C ํ”„๋กœ์ ํŠธ ๋˜‘๋˜‘ํ•˜๊ฒŒ ์ปดํŒŒ์ผํ•˜๊ณ  ๋นŒ๋“œํ•˜๊ธฐ! โœŒ๏ธ

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PyTorch

Faster R-CNN

10 minute read

์ด ํฌ์ŠคํŠธ๋Š” ์ œ๊ฐ€ ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ •๋ฆฌํ•˜๋Š” ์šฉ๋„์˜ ๊ธ€ ์ž…๋‹ˆ๋‹ค.

PyTorch - ๋ชจ๋ธ ์ปค์Šคํ…€

4 minute read

๋ณธ ๊ธ€์€ ์ œ๊ฐ€ PyTorch Turotial์˜ torchvision object detection ๋ถ€๋ถ„์„ ์ฝ๊ณ  ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

PyTorch - autograd

11 minute read

๋ณธ ๊ธ€์€ ์ œ๊ฐ€ PyTorch Turotial์˜ autograd ๋ถ€๋ถ„์„ ์ฝ๊ณ  ์ดํ•ด๊ฐ€ ์•ˆ ๋˜๋Š” ๋ถ€๋ถ„์„ ๋ณด์ถฉํ•˜๊ธฐ ์œ„ํ•ด ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Network

Network Devices

1 minute read

์ด ํฌ์ŠคํŠธ๋Š” [Youtube] Hub, Bridge, Switch, Router - Network Devices ์˜์ƒ์˜ ๋‚ด์šฉ์„ ๋ฐ”ํƒ•์œผ๋กœ ์ž‘์„ฑ๋œ ๊ฒƒ์ž„์„ ๋ฐํž˜๋‹ˆ๋‹ค.

Proxy - Forward & Reverse Proxy

1 minute read

์ด ๊ธ€์€ Proxy๋ฅผ ๊ณต๋ถ€ํ•˜๋ฉด์„œ ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

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Delta Lake

Delta Lake Optimize

18 minute read

Delta Lake๋กœ ์ €์žฅ๋œ ๋ฐ์ดํ„ฐ๋ฅผ ์ตœ์ ํ™”ํ•˜๋Š” ์—ฌ๋Ÿฌ ํ…Œํฌ๋‹‰๋“ค. Compaction(์••์ถ•), Data Skipping, Z-Ordering

Delta Lake Vacuum

3 minute read

Stale ๋œ Parquet ํŒŒ์ผ๋“ค์„ ์ •๋ฆฌํ•ด์„œ ์šฉ๋Ÿ‰ ์••์ถ•ํ•˜๊ธฐ ๐Ÿงน

Delta Lake Time Travel

2 minute read

Delta ํ…Œ์ด๋ธ”์˜ ๋ฒ„์ „ ๊ด€๋ฆฌ๋ฅผ ํ†ตํ•ด ํŠน์ • ์‹œ์ ๊ณผ ํŠน์ • ๋ฒ„์ „์œผ๋กœ ์‹œ๊ฐ„ ์—ฌํ–‰ํ•˜๊ธฐ. ํŠน์ • ๋ฒ„์ „์œผ๋กœ ๋ณต๊ตฌํ•˜๋Š” ๊ฒƒ๊นŒ์ง€!

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Reading

์ข…๋งŒ๋ถ ๋ฆฌ๋”ฉ - 1

1 minute read

์ด ๊ธ€์€ ์ •๋ฆฌ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ž‘์„ฑ๋œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

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AWS

Games on AWS 2023 ๋ฆฌ๋ทฐ

12 minute read

๋ฐœ๋กœ๋ž€ํŠธ, Marvel Sanp์˜ ์•„ํ‚คํ…์ฒ˜์™€ AWS Serverless ํŠธ๋ Œ๋“œ, K8s Pod/Node Scaling

EKS Cluster Setup ํ›„๊ธฐ

6 minute read

AWS CLI๋ฅผ ํ†ตํ•ด EKS ํด๋Ÿฌ์Šคํ„ฐ๋ฅผ ๋„์šฐ๊ณ , AWS Access Key๋ฅผ ์ด์šฉํ•ด ์ ‘์†ํ•ด๋ณด์ž! ์ฒ˜์Œ์—๋Š” โ€˜EKS Cluster? ๊ทธ๊ฑฐ ๊ทธ๋ƒฅ ๋„์šฐ๋ฉด K8s ํด๋Ÿฌ์Šคํ„ฐ ๋„์šฐ๋Š” ๊ฑฐ ์•„๋‹Œ๊ฐ€?โ€™๋ผ๊ณ  ๋งŒ๋งŒํ•˜๊ฒŒ ๋ดค๋Š”๋ฐ, ์ด๋Ÿฐโ€ฆ EKS ํด๋Ÿฌ์Šคํ„ฐ๋ฅผ ๋„์šฐ๊ณ  ์‹ค์ œ ์ ‘์†๊นŒ์ง€ ํ•˜๋Š” ๊ณผ์ •์ด ์ˆœํƒ„์น˜ ์•Š์•˜๋‹ค....

AWS Amazon Linux 2 ๊ฐœ๋ฐœ ์…‹์—…

5 minute read

์ด ๊ธ€์€ ์ •๋ฆฌ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์ธ ์šฉ๋„๋กœ ์ž‘์„ฑ๋œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ์กฐ์–ธ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค ใ…Žใ…Ž

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Recommendation Algorithm

Latent Matrix Factorization

13 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜๊ณผ์ œ์—ฐ๊ตฌโ€™ ์ˆ˜์—…์—์„œ ์ง„ํ–‰ํ•˜๋Š” ๊ฐœ์ธ ํ”„๋กœ์ ํŠธ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ๊ต๋ฅ˜๋Š” ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Recommendation Algorithm - Basic

7 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜๊ณผ์ œ์—ฐ๊ตฌโ€™ ์ˆ˜์—…์—์„œ ์ง„ํ–‰ํ•˜๋Š” ๊ฐœ์ธ ํ”„๋กœ์ ํŠธ๋ฅผ ์œ„ํ•ด ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ๊ณผ ๊ต๋ฅ˜๋Š” ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Artificial Intelligence

Back-propagation

3 minute read

2020-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์ธ๊ณต์ง€๋Šฅโ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

Introduction to AI

2 minute read

2020-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜์ธ๊ณต์ง€๋Šฅโ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Data Mining

Fourier Transform

6 minute read

2021-1ํ•™๊ธฐ, ๋Œ€ํ•™์—์„œ โ€˜๋ฐ์ดํ„ฐ ๋งˆ์ด๋‹โ€™ ์ˆ˜์—…์„ ๋“ฃ๊ณ  ๊ณต๋ถ€ํ•œ ๋ฐ”๋ฅผ ์ •๋ฆฌํ•œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

SVM; Support Vector Machine

12 minute read

๋ณธ ๊ธ€์€ 2020-2ํ•™๊ธฐ โ€œ์ปดํ“จํ„ฐ ๋น„์ „โ€ ์ˆ˜์—…์˜ ๋‚ด์šฉ์„ ๊ฐœ์ธ์ ์œผ๋กœ ์ •๋ฆฌํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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NLP

RNN & LSTM

6 minute read

2020-2ํ•™๊ธฐ โ€œ์—ฐ๊ตฌ์ฐธ์—ฌ(CSED339A)โ€์—์„œ ์ง„ํ–‰ํ•œ โ€œStanford CS231โ€ ์Šคํ„ฐ๋””์—์„œ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ ์ •๋ฆฌํ•œ ํฌ์ŠคํŠธ์ž…๋‹ˆ๋‹ค. ์ง€์ ์€ ์–ธ์ œ๋‚˜ ํ™˜์˜์ž…๋‹ˆ๋‹ค :)

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Security

Istio Security

13 minute read

Istio์—์„œ Zero-Trust Network๋ฅผ ๊ตฌ์ถ•ํ•˜๋Š” ๊ธธ ๐Ÿ” PeerAuthentication์œผ๋กœ Istio ์›Œํฌ๋กœ๋“œ์˜ ์ ‘๊ทผ๋งŒ ํ—ˆ์šฉํ•˜๊ธฐ, AuthorizationPolicy๋กœ ์š”์ฒญ์˜ ์ถœ๋ฐœ์ง€/๋„์ฐฉ์ง€/์†์„ฑ์„ ๊ธฐ์ค€์œผ๋กœ ์ ‘๊ทผ ์ œ์–ดํ•˜๊ธฐ, Sidecar๋กœ Envoy Sidecar ๊ตฌ์„ฑ ...

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Set Theory

์นธํ† ์–ด ์ง‘ํ•ฉ

1 minute read

๊ธธ์ด๋Š” 0์ด๋ฉด์„œ, ์ง‘ํ•ฉ์˜ ํฌ๊ธฐ๋Š” ์‹ค์ˆ˜ ์ „์ฒด์™€ ๋ฐ˜์ง๊ด€์ ์ธ ์ง‘ํ•ฉ

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knative

Install Knative Serving

11 minute read

์ขŒ์ถฉ์šฐ๋Œ! Knative ์„ค์น˜ ์ˆ˜๋‚œ๊ธฐ. Istio๋ฅผ ๋„คํŠธ์›Œํ‚น ๋ฐฑ์—”๋“œ๋กœ ์‚ฌ์šฉํ•˜๋Š” Knative โ›ต๏ธ

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Kafka

Hello, Avro!

7 minute read

Json๋ณด๋‹ค ๋น ๋ฅด๊ณ  ์ปดํŒฉํŠธํ•œ Avro ํฌ๋งท์„ ๋งŒ๋‚˜๋ณด์ž ๐Ÿ‘‹

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