Physics

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Series Prediction based on Algebraic Approximants

Series Prediction based on Algebraic Approximants

์ด ๋…ผ๋ฌธ์€ ๋ณต์žกํ•œ ํ•จ์ˆ˜์˜ ์‹œํ€€์Šค ์˜ˆ์ธก์„ ์œ„ํ•œ ์ƒˆ๋กœ์šด ์ ‘๊ทผ๋ฒ•์„ ์ œ์‹œํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ, ์ด ์—ฐ๊ตฌ๋Š” ๋Œ€์ˆ˜์  ๊ทผ์‚ฌ์™€ ํ—ˆ๋ฏธํŠธ ํŒŒ๋ฐ ๋‹คํ•ญ์‹(HPP)์— ์ค‘์ ์„ ๋‘๊ณ  ์žˆ์œผ๋ฉฐ, ์ด๋ฅผ ํ†ตํ•ด ๋ณต์žกํ•œ ์‹œํ€€์Šค๋ฅผ ํšจ๊ณผ์ ์œผ๋กœ ์˜ˆ์ธกํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐฉ๋ฒ•๋ก ์„ ๊ฐœ๋ฐœํ•˜์˜€์Šต๋‹ˆ๋‹ค. 1. ๋Œ€์ˆ˜์  ๊ทผ์‚ฌ์˜ ๊ฐœ๋… ๋…ผ๋ฌธ์€ ๋Œ€์ˆ˜์  ๊ทผ์‚ฌ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ณต์žกํ•œ ํ•จ์ˆ˜์˜ ์ง€์ˆ˜ ๊ธ‰์ˆ˜๋ฅผ ๊ทผ์‚ฌํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์„ค๋ช…ํ•ฉ๋‹ˆ๋‹ค. ์ด๋Š” ํ—ˆ๋ฏธํŠธ ํŒŒ๋ฐ ๋‹คํ•ญ์‹(HPP)์„ ์ด์šฉํ•ด ์ˆ˜ํ–‰๋˜๋ฉฐ, HPP๋Š” ์ฃผ์–ด์ง„ ํ•จ์ˆ˜ f ๊ฐ€ ์ง€์ˆ˜ ๊ธ‰์ˆ˜ ํ˜•ํƒœ๋กœ ํ‘œํ˜„๋  ๋•Œ, ์ด๋ฅผ ๊ทผ์‚ฌํ•˜๋Š” ๋‹คํ•ญ์‹ ์ง‘ํ•ฉ์ž…๋‹ˆ๋‹ค. 2. ํ—ˆ๋ฏธํŠธ ํŒŒ๋ฐ ๋‹คํ•ญ์‹์˜ ๊ตฌ์„ฑ

Mathematics Physics
Turbulent viscosity variability in self-propelled body wake model

Turbulent viscosity variability in self-propelled body wake model

: ๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์ž๊ฐ€ ์ถ”์ง„์ฒด์˜ ๋‚œ๋ฅ˜ ํ›„๋ฅ˜์—์„œ ์ผ์ •ํ•œ ๋‚œ๋ฅ˜ ์ ๋„ ๊ฐ€์ •์„ ํ๊ธฐํ•˜๊ณ , ์ขŒํ‘œ์— ๋”ฐ๋ฅธ ๋ณ€๋™์„ ๊ณ ๋ คํ•˜๋Š” ์ƒˆ๋กœ์šด ์ ‘๊ทผ ๋ฐฉ์‹์„ ์ œ์‹œํ•œ๋‹ค. ์ด๋Š” ์‹ค์ œ ํ๋ฆ„ ํ˜„์ƒ๊ณผ ๋” ์ž˜ ๋ถ€ํ•ฉํ•˜๋ฉฐ, ๊ธฐ์กด ๋ชจ๋ธ์˜ ํ•œ๊ณ„๋ฅผ ๊ทน๋ณตํ•˜๋ ค๋Š” ์‹œ๋„์ด๋‹ค. 1. ๋‚œ๋ฅ˜ ํ›„๋ฅ˜์˜ ์ค‘์š”์„ฑ ๋‚œ๋ฅ˜ ํ›„๋ฅ˜์˜ ์—ฐ๊ตฌ๋Š” ๊ณผํ•™์  ์ดํ•ด๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ์‹ค์šฉ์ ์ธ ์ธก๋ฉด์—์„œ๋„ ๋งค์šฐ ์ค‘์š”ํ•˜๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด, ๊ณตํ•ญ ์šด์˜์—์„œ๋Š” ๋‚œ๋ฅ˜ ํ›„๋ฅ˜๊ฐ€ ๋น„ํ–‰๊ธฐ์˜ ์ด์ฐฉ๋ฅ™์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋ฉฐ, ํ•ด์–‘ ํ‘œ์ธต์—์„œ์˜ ํ˜ผํ•ฉ ๊ณผ์ •์€ ์„ ๋ฐ•์˜ ์šดํ•ญ๊ณผ ์ง์ ‘์ ์œผ๋กœ ์—ฐ๊ด€๋˜์–ด ์žˆ๋‹ค. ํŠนํžˆ, ์„ ๋ฐ•์˜ ๋‚œ๋ฅ˜ ํ›„๋ฅ˜๋Š” ๋ ˆ์ด๋” ๊ด€์ธก ํ•ด์„์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜

Physics Model
Electrostatic accelerometer with bias rejection for deep space   gravitation tests

Electrostatic accelerometer with bias rejection for deep space gravitation tests

์ด ๋…ผ๋ฌธ์€ ์šฐ์ฃผ ์ค‘๋ ฅ ์‹คํ—˜์„ ์œ„ํ•œ ๊ณ ๋„๋กœ ์ •๊ตํ•œ ์ „๊ธฐ ๊ฐ€์†๋„๊ณ„์ธ ๋ฏธํฌ๋กœ์Šคํƒ€๋ฅด(MicroSTAR)์™€ ๋ฐ”์ด์–ด์Šค ์žฌ๊ฑฐ์ ˆ ์‹œ์Šคํ…œ์— ๋Œ€ํ•œ ์‹ฌ์ธต ๋ถ„์„์„ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ์šฐ์ฃผ์—์„œ์˜ ๋น„์ค‘๋ ฅ ํ™˜๊ฒฝ์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๊ทนํžˆ ๋ฏธ์„ธํ•œ ๊ฐ€์†๋„๋ฅผ ์ธก์ •ํ•˜๊ธฐ ์œ„ํ•œ ์ƒˆ๋กœ์šด ์ ‘๊ทผ ๋ฐฉ์‹์„ ์ œ์‹œํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ๋ฏธํฌ๋กœ์Šคํƒ€๋ฅด(MicroSTAR)์™€ ๋ฐ”์ด์–ด์Šค ์žฌ๊ฑฐ์ ˆ ์‹œ์Šคํ…œ ๋ฏธํฌ๋กœ์Šคํƒ€๋ฅด : ์ด๋Š” ์ „ํ•˜ ๊ฐ€์†๋„๊ณ„๋กœ, Onera์—์„œ ๊ฐœ๋ฐœ๋œ ์˜จ๋ผ ๊ธฐ์ˆ ์„ ํ™œ์šฉํ•˜์—ฌ ์œ„์„ฑ์˜ ๋น„์ค‘๋ ฅ ํ™˜๊ฒฝ์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๊ทนํžˆ ๋ฏธ์„ธํ•œ ๊ฐ€์†๋„๋ฅผ ์ธก์ •ํ•ฉ๋‹ˆ๋‹ค. ์ธก์ • ๋…ธ์ด์ฆˆ๋Š” 1.8 ร— 10^ 4 mยทs^ 2 ๋ฒ”

General Relativity Physics
Electroluminescence in photovoltaic cell

Electroluminescence in photovoltaic cell

: ๋ณธ ๋…ผ๋ฌธ์€ ๋ฐœ๊ด‘ ํƒœ์–‘์ „์ง€(Electroluminescence, EL) ํ˜„์ƒ์„ ์ดฌ์˜ํ•˜๋Š” ๊ธฐ์ˆ ์„ ์ƒ์„ธํžˆ ์„ค๋ช…ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Š” ๊ณผํ•™์ž๋“ค์ด ํƒœ์–‘์ „์ง€์˜ ์„ฑ๋Šฅ๊ณผ ์ƒํƒœ๋ฅผ ์‹œ๊ฐ์ ์œผ๋กœ ๋ถ„์„ํ•  ์ˆ˜ ์žˆ๋Š” ์ค‘์š”ํ•œ ๋„๊ตฌ์ž…๋‹ˆ๋‹ค. 1. EL ํ˜„์ƒ ๋ฐ ์นด๋ฉ”๋ผ ๊ฐ๋„ ๋ฌธ์ œ ํƒœ์–‘์ „์ง€๋Š” ์ž‘๋™ ์ค‘์— ์†Œ๋Ÿ‰์˜ ๋ฐฉ์‚ฌ์„ ์„ ๋ฐฉ์ถœํ•ฉ๋‹ˆ๋‹ค. ์ด ๋ฐฉ์‚ฌ์„ ์€ ์ฃผ๋กœ ์ ์™ธ์„  ์˜์—ญ์— ์œ„์น˜ํ•˜๋ฉฐ, ์ƒ์šฉ ๋””์ง€ํ„ธ ์นด๋ฉ”๋ผ๋Š” ์ด๋Ÿฌํ•œ ๋น›์„ ํšจ๊ณผ์ ์œผ๋กœ ํฌ์ฐฉํ•˜๊ธฐ ์–ด๋ ต์Šต๋‹ˆ๋‹ค. ๋Œ€๋ถ€๋ถ„์˜ CCD ์„ผ์„œ๋Š” ๊ทผ์ ์™ธ์„ (1000nm๊นŒ์ง€)์— ๋ฏผ๊ฐํ•˜์ง€๋งŒ, IR ํ•„ํ„ฐ๋ฅผ ํ†ตํ•ด IR ๋น›์œผ๋กœ ์ธํ•œ ํ๋ฆผ ํ˜„์ƒ์„ ๋ณด์™„ํ•ฉ๋‹ˆ๋‹ค. ์ด๋กœ

Physics
Hydrogen Geysers: Explanation for Observed Evidence of Geologically   Recent Volatile-Related Activity on Mercurys Surface

Hydrogen Geysers: Explanation for Observed Evidence of Geologically Recent Volatile-Related Activity on Mercurys Surface

: ์ด ๋…ผ๋ฌธ์€ ์ˆ˜์„ฑ์˜ ์ง€ํ˜• ํ˜•์„ฑ์— ๋Œ€ํ•œ ์ƒˆ๋กœ์šด ์ด๋ก ์„ ์ œ์‹œํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ๊ทธ ์ค‘์‹ฌ์—๋Š” ํœ˜๋ฐœ์„ฑ ํ™œ๋™๊ณผ ์ฒ ์˜ ์—ญํ• ์ด ์žˆ์Šต๋‹ˆ๋‹ค. ์ €์ž๋Š” ๊ธฐ์กด ๋ชจ๋ธ๋“ค๊ณผ๋Š” ๋‹ค๋ฅธ ๊ด€์ ์„ ํ†ตํ•ด ์ˆ˜์„ฑ์˜ ํ•ต์— ์—„์ฒญ๋‚œ ์–‘์˜ ์ˆ˜์†Œ๊ฐ€ ํฌํ•จ๋˜์–ด ์žˆ๋‹ค๋Š” ๊ฐ€์„ค์„ ๋‚ด์„ธ์šฐ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ํœ˜๋ฐœ์„ฑ ํ™œ๋™์˜ ์ค‘์š”์„ฑ ์ˆ˜์„ฑ ํ‘œ๋ฉด์—์„œ ๋ฐœ๊ฒฌ๋œ '๋น„์ •์ƒ์ ์ธ ์ง€ํ˜•'์€ ํœ˜๋ฐœ์„ฑ ํ™œ๋™์œผ๋กœ ์ธํ•ด ํ˜•์„ฑ๋˜์—ˆ๋‹ค๋Š” ์ฃผ์žฅ์ด ์ œ๊ธฐ๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ง€ํ˜•์€ ์ˆ˜์„ฑ์˜ ๊ณ ์œ ํ•œ ํŠน์ง• ์ค‘ ํ•˜๋‚˜๋กœ, ๊ทธ ์›์ธ์„ ๊ทœ๋ช…ํ•˜๋Š” ๊ฒƒ์€ ํ–‰์„ฑ ๊ณผํ•™์— ์ค‘์š”ํ•œ ์˜๋ฏธ๋ฅผ ๊ฐ–์Šต๋‹ˆ๋‹ค. 2. ์ˆ˜์„ฑ ํ•ต ๋‚ด๋ถ€์˜ ํœ˜๋ฐœ์„ฑ ์š”์†Œ ์ €์ž๋Š” ์ดˆ๊ธฐ ํƒœ์–‘๊ณ„์—์„œ ๋ฐœ์ƒํ•œ

Physics
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Mathematical proof of fraud in Russian elections unsound

์ด ๋…ผ๋ฌธ์€ ๋Ÿฌ์‹œ์•„ ์„ ๊ฑฐ ๊ฒฐ๊ณผ์— ๋Œ€ํ•œ ์ˆ˜ํ•™์  ๋ถ„์„๊ณผ ๋น„ํŒ์„ ์ค‘์‹ฌ์œผ๋กœ, ํŠนํžˆ ๊ฐ€์šฐ์Šค ๋ถ„ํฌ์™€ ํˆฌํ‘œ์œจ์˜ ๊ด€๊ณ„๋ฅผ ํƒ๊ตฌํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ฃผ์š” ๋‚ด์šฉ์€ ๋‹ค์Œ๊ณผ ๊ฐ™์Šต๋‹ˆ๋‹ค: 1. ๊ฐ€์šฐ์Šค ๋ถ„ํฌ์™€ ํˆฌํ‘œ์œจ ๋…ผ๋ฌธ์€ ๋ธ”๋กœ๊ฑฐ๊ฐ€ ์—ฐํ•ฉ ๋Ÿฌ์‹œ์•„๋‹น์˜ ํˆฌํ‘œ์œจ์ด ์ง€์—ญ๊ตฌ๋ณ„๋กœ ๋น„๊ฐ€์šฐ์Šค ๋ถ„ํฌ๋ฅผ ๋ณด์ธ๋‹ค๋Š” ์ ์„ ์ง€์ ํ•˜๊ณ  ์ด๋ฅผ ์„ ๊ฑฐ ์กฐ์ž‘์˜ ์ฆ๊ฑฐ๋กœ ์ฃผ์žฅํ•˜๋Š” ๋‚ด์šฉ์— ๋Œ€ํ•ด ๋ฐ˜๋ก ํ•ฉ๋‹ˆ๋‹ค. ๊ฐ€์šฐ์Šค ๋ถ„ํฌ๋Š” ์—ฌ๋Ÿฌ ๋…๋ฆฝ์ ์ธ ์š”์ธ์ด ์ƒํ˜ธ์ž‘์šฉํ•  ๋•Œ ๋ฐœ์ƒํ•˜๋ฉฐ, ์ด๋Š” ์ž์—ฐ ํ˜„์ƒ์—์„œ ํ”ํžˆ ๋ณผ ์ˆ˜ ์žˆ๋Š” ํŒจํ„ด์ž…๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ๋ชจ๋“  ์‚ฌํšŒ์  ํ˜„์ƒ์ด ์ด๋Ÿฌํ•œ ํŒจํ„ด์„ ๋”ฐ๋ฅด์ง€ ์•Š๋Š”๋‹ค๋Š” ์ ์„ ๊ฐ•์กฐํ•ฉ๋‹ˆ๋‹ค. 2. ๋งˆ๋ฅด์ฝ”ํ”„์˜ ๋ชจ๋ธ

Applications Statistics Physics
Introduction to Bronsteins 'Quantum theory of weak gravitational   fields'

Introduction to Bronsteins 'Quantum theory of weak gravitational fields'

๋ธŒ๋ก ์Šˆํƒ€์ธ์˜ ๋…ผ๋ฌธ์€ 1935๋…„์ด๋ผ๋Š” ์‹œ๋Œ€์  ๋ฐฐ๊ฒฝ์—์„œ ์ค‘์š”ํ•œ ์˜๋ฏธ๋ฅผ ์ง€๋‹ˆ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ์‹œ๊ธฐ์—๋Š” ํ˜„๋Œ€์ ์ธ ์–‘์ž์žฅ ์ด๋ก ์ด ์•„์ง ์ดˆ๊ธฐ ๋‹จ๊ณ„์— ์žˆ์—ˆ์œผ๋ฉฐ, ๋ธŒ๋ก ์Šˆํƒ€์ธ์˜ ์—ฐ๊ตฌ๋Š” ์ด๋Ÿฌํ•œ ๋งฅ๋ฝ์—์„œ ๋งค์šฐ ํ˜์‹ ์ ์ด์—ˆ์Šต๋‹ˆ๋‹ค. ๊ทธ์˜ ์ž‘์—…์€ ๋กœ์  ํŽ ๋“œ(L. Rosenfeld)์˜ ๋…ผ๋ฌธ ์ดํ›„ ๋‘ ๋ฒˆ์งธ๋กœ ์–‘์žํ™”๋œ ์ค‘๋ ฅ(์„ ํ˜•ํ™”๋œ ์ค‘๋ ฅ)์— ๋Œ€ํ•œ ์—ฐ๊ตฌ์˜€์œผ๋ฉฐ, ์ด๋Š” ๋‹น์‹œ์˜ ๋ฌผ๋ฆฌํ•™์  ์ƒํ™ฉ์„ ๋ฐ˜์˜ํ•˜๊ณ  ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค. ๋ธŒ๋ก ์Šˆํƒ€์ธ์˜ ์—ฐ๊ตฌ๋Š” ํ‰ํ‰ํ•œ ์‹œ๊ณต์—์„œ ์งˆ๋Ÿ‰ ์—†๋Š” ์Šคํ•€ 2 ํ•„๋“œ์˜ ๋‘ ๋ฒˆ์งธ ์–‘์žํ™”๋ฅผ ๋‹ค๋ฃจ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ ‘๊ทผ ๋ฐฉ์‹์€ ์ œ๋กœ ํฌ์ธํŠธ ์—๋„ˆ์ง€๋ฅผ ํ”ผํ•˜๊ธฐ ์œ„ํ•œ ์ ์ ˆํ•œ

General Relativity Physics
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Procedure to produce discretized path composed by semi-circle and straigth sub-paths

: ๋ณธ ๋…ผ๋ฌธ์€ ๋ณต์žกํ•œ ๋ฌผ๋ฆฌํ•™ ๋ฌธ์ œ์—์„œ ๊ฒฝ๋กœ ์ •๋ณด๋ฅผ ์ด์‚ฐํ™”ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ํŠนํžˆ ์—ญํ•™, ์—ด์—ญํ•™, ์œ ์ฒด์—ญํ•™ ๋ฐ ์ •์ „๊ธฐํ•™ ๋ถ„์•ผ์—์„œ์˜ ์ ์šฉ ๊ฐ€๋Šฅ์„ฑ์„ ํƒ์ƒ‰ํ•œ๋‹ค. ์ด๋Ÿฌํ•œ ๋ฌธ์ œ๋“ค ์ค‘ ํ•˜๋‚˜๋Š” ๋งˆ์ฐฐ์— ์˜ํ•œ ์ผ์„ ๊ณ„์‚ฐํ•˜๋Š” ๊ฒƒ์ด๋ฉฐ, ์ด๋ฅผ ์œ„ํ•ด์„œ๋Š” ๊ฒฝ๋กœ์˜ ๊ฐ๋„์™€ ์œ„์น˜ ์ •๋ณด๊ฐ€ ํ•„์š”ํ•˜๋‹ค. ๋…ผ๋ฌธ์€ ๊ฒฝ๋กœ s๋ฅผ ์ด์‚ฐํ™”ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•˜๋Š”๋ฐ, ์—ฌ๊ธฐ์„œ ds๋Š” ๊ฒฝ๋กœ์˜ ์ž‘์€ ๋ถ€๋ถ„์„ ๋‚˜ํƒ€๋‚ด๋ฉฐ, ์ด๋ฅผ dx์™€ dy๋กœ ํ‘œํ˜„ํ•  ์ˆ˜ ์žˆ๋‹ค. ๋˜ํ•œ ฮธ๋ฅผ x์ถ•๊ณผ ds ์‚ฌ์ด์˜ ๊ธฐ์šธ๊ธฐ ๊ฐ๋„๋กœ ์ •์˜ํ•˜์—ฌ, ๊ฒฝ๋กœ์˜ ๋ฐฉํ–ฅ์„ฑ์„ ๋‚˜ํƒ€๋‚ธ๋‹ค. ์ด๋Ÿฌํ•œ ์ด์‚ฐํ™” ๊ณผ์ •์€ ๊ฒฝ๋กœ๋ฅผ N๊ฐœ์˜ ๊ท ๋“ฑํ•œ ์„ธ๊ทธ

Physics
No Image

The Geometry of the Non-Linear Least Squares Adjustment

: ๋ณธ ๋…ผ๋ฌธ์€ ๋น„์„ ํ˜• ๋ณด์ƒ(๋˜๋Š” ๋น„์„ ํ˜• ์กฐ์ •)์˜ ๊ธฐํ•˜ํ•™์  ์ ‘๊ทผ ๋ฐฉ์‹๊ณผ ํŒŒ์ฆˆ๋งŒ ์ •๋ฆฌ์— ์ค‘์ ์„ ๋‘๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ๊ฐ€์šฐ์Šค ๋งˆ์ฝ”ํ”„ ๋ชจ๋ธ์„ ์ด์šฉํ•˜์—ฌ ๊ด€์ธก๊ฐ’๊ณผ ๋ฏธ์ง€ ๋ณ€์ˆ˜ ๊ฐ„์˜ ๊ด€๊ณ„๋ฅผ ํ‘œํ˜„ํ•˜๊ณ , ์ตœ์†Œ์ œ๊ณฑ๋ฒ•์„ ํ†ตํ•ด ์ด๋ฅผ ํ•ด๊ฒฐํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•ฉ๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์—์„œ ๋‹ค๋ฃจ๋Š” ๋น„์„ ํ˜• ๊ฐ€์šฐ์Šค ๋งˆ์ฝ”ํ”„ ๋ชจ๋ธ์€ ๋‹ค์Œ๊ณผ ๊ฐ™์ด ์ •์˜๋ฉ๋‹ˆ๋‹ค: ฮถ(X) Le; ์—ฌ๊ธฐ์„œ e๋Š” ํ‰๊ท ์ด 0์ด๊ณ  ๋ถ„์‚ฐ ํ–‰๋ ฌ ฮ“๋ฅผ ๋”ฐ๋ฅด๋Š” ์ •๊ทœ ๋ถ„ํฌ๋ฅผ ๊ฐ–๋Š” ์˜ค์ฐจ ๋ฒกํ„ฐ์ž…๋‹ˆ๋‹ค. ์ด ๋ชจ๋ธ์„ ํ†ตํ•ด ๊ด€์ธก๊ฐ’๊ณผ ๋ฏธ์ง€ ๋ณ€์ˆ˜ ๊ฐ„์˜ ๊ด€๊ณ„๋ฅผ ํ‘œํ˜„ํ•˜๊ณ , ์ตœ์†Œ์ œ๊ณฑ๋ฒ•์„ ์ด์šฉํ•˜์—ฌ ์ด ๋ชจ๋ธ์—์„œ์˜ ํ•ด๋ฅผ ์ฐพ์Šต๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์—์„œ๋Š”

Physics
No Image

Note sur Les Representations Quasi-Conformes

1. ๋“ฑ๊ฐ์  ์œ„๋„ ๋ณ€ํ™˜ ๋“ฑ๊ฐ์  ์œ„๋„ ๋ณ€ํ™˜์€ ์ฃผ์–ด์ง„ ์œ„๋„๋ฅผ ๋ณด์กดํ•˜๋Š” ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ตฌ์˜ ํ‘œ๋ฉด์„ ํ‰๋ฉด์œผ๋กœ ๋งคํ•‘ํ•˜๋Š” ๋ฐฉ๋ฒ•์ด๋‹ค. ์ด ๋…ผ๋ฌธ์—์„œ๋Š” `1 + e sin(ฯ†) / (1 e sin(ฯ†)) 4`๋ผ๋Š” ์‹์„ ํ†ตํ•ด ์œ„๋„ ๋ณด์กด์„ ์„ค๋ช…ํ•œ๋‹ค. ์—ฌ๊ธฐ์„œ `e`๋Š” ํƒ€์›์ฒด์˜ ํŽธ์‹ฌ๋ฅ , `ฯ†`๋Š” ์œ„๋„๋ฅผ ๋‚˜ํƒ€๋‚ธ๋‹ค. 2. ์ค€๋“ฑ๊ฐ ๋ณ€ํ™˜์˜ ์ •์˜์™€ ํŠน์„ฑ ์ค€๋“ฑ๊ฐ ๋ณ€ํ™˜์€ ๊ฐ์„ ๋ณด์กดํ•˜๊ฑฐ๋‚˜ ๋” ์ •ํ™•ํ•˜๊ฒŒ๋Š” ๋ณต์†Œํ‰๋ฉด์—์„œ ๋ฏธ๋ถ„ ๊ฐ€๋Šฅํ•œ ํ•จ์ˆ˜๋ฅผ ํ†ตํ•ด ํ‘œํ˜„๋œ๋‹ค. ์ด ๋…ผ๋ฌธ์—์„œ๋Š” `Z(z) f(z) z^n + ...` ํ˜•ํƒœ์˜ ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ค€๋“ฑ๊ฐ ๋ณ€ํ™˜์„ ์„ค๋ช…ํ•œ๋‹ค. ์—ฌ๊ธฐ์„œ `z L

Physics
How to produce discreet Gaussian sequences: Algorithm and code

How to produce discreet Gaussian sequences: Algorithm and code

๋งค๋ ฅ์ ์ธ ํ•œ๊ธ€ ์ œ๋ชฉ: ๊ฐ€์šฐ์Šค ๋ถ„ํฌ ์‹œํ€€์Šค ์ƒ์„ฑ ์•Œ๊ณ ๋ฆฌ์ฆ˜๊ณผ ์ฝ”๋“œ ์ดˆ๋ก ์ „์ฒด ๋ฒˆ์—ญ ๋ฐ ์ •๋ฆฌ: ๊ฐ€์šฐ์Šค ๋ถ„ํฌ ํ•จ์ˆ˜๋Š” ์ˆ˜ํ•™ ๋ชจ๋ธ๋ง, ๋ฌผ๋ฆฌํ•™, ์–‘์ž ํ™”ํ•™, ํ•ต๋ฌผ๋ฆฌํ•™, ๋ฐ˜๋„์ฒด ์žฅ์น˜ ๋“ฑ ๋‹ค์–‘ํ•œ ๊ณผํ•™ ๋ถ„์•ผ์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•ฉ๋‹ˆ๋‹ค. ํŠนํžˆ ๋ถ„์ž ๋™์—ญํ•™ ์‹œ๋ฎฌ๋ ˆ์ด์…˜์—์„œ๋Š” ๊ฐ€์šฐ์Šค ๋ถ„ํฌ๋ฅผ ๋”ฐ๋ฅด๋Š” ์‹œํ€€์Šค ์ƒ์„ฑ์ด ํ•„์ˆ˜์ ์ž…๋‹ˆ๋‹ค. ๋ณธ ๋…ผ๋ฌธ์€ ์ด๋Ÿฌํ•œ ์‹œํ€€์Šค๋ฅผ ์ƒ์„ฑํ•˜๋Š” ์•Œ๊ณ ๋ฆฌ์ฆ˜๊ณผ C++ ์ฝ”๋“œ๋ฅผ ์ œ์‹œํ•ฉ๋‹ˆ๋‹ค. ๊ฐ€์šฐ์Šค ๋ถ„ํฌ ํ•จ์ˆ˜๋Š” ํ‰๊ท  ฮผ์™€ ํ‘œ์ค€ ํŽธ์ฐจ ฯƒ๋กœ ํ‘œํ˜„๋˜๋ฉฐ, ์ด ํ•จ์ˆ˜์˜ ๊ทน์ ์€ z ฮผ์—์„œ ๋ฐœ์ƒํ•˜๊ณ , z ฮผ ยฑ 1.2ฯƒ์—์„œ๋Š” ํŠน์ • ๊ฐ’์„ ๊ฐ€์ง‘๋‹ˆ๋‹ค. ์‹œ๋ฎฌ๋ ˆ์ด์…˜์— ์‚ฌ์šฉ๋˜๋Š”

Physics
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A 3D Multiscale Modelling of Cortical Bone Structure, Using the Inverse Identification Method: Microfibril Scale Study

: ๋ณธ ๋…ผ๋ฌธ์€ ์••์ถ•์„ฑ ๋ผˆ์˜ ๋ฏธ์„ธ๊ตฌ์กฐ๋ฅผ ๋‹ค์ค‘ ๊ทœ๋ชจ ๋ชจ๋ธ๋ง์„ ํ†ตํ•ด ๋ถ„์„ํ•˜๊ณ ์ž ํ•˜๋Š” ์—ฐ๊ตฌ๋กœ, ํŠนํžˆ ๋ฏธ์„ธ์„ฌ์œ (microfibril) ์ˆ˜์ค€์—์„œ์˜ ๊ตฌ์กฐ์™€ ๊ธฐ๊ณ„์  ํŠน์„ฑ์„ ํƒ๊ตฌํ•ฉ๋‹ˆ๋‹ค. ์ด๋Š” ๊ณจ์งˆ(cortical bone) ๋‚ด์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š” ์ฝœ๋ผ๊ฒ ์„ฌ์œ ์™€ ๊ทธ์— ํฌํ•จ๋œ ํŠธ๋กœํฌ์ฝœ๋ผ๊ฒ ๋ถ„์ž๋“ค์˜ ๋ฐฐ์—ด ๋ฐ ๋ฏธ๋„ค๋ž„ํ™” ๊ณผ์ •์— ๋Œ€ํ•œ ์‹ฌ๋„ ์žˆ๋Š” ์ดํ•ด๋ฅผ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. 1. ์—ฐ๊ตฌ ๋ฐฐ๊ฒฝ๊ณผ ๋ชฉ์  ๋ณธ ์—ฐ๊ตฌ๋Š” ์••์ถ•์„ฑ ๋ผˆ์˜ ๋ณต์žกํ•œ ๊ตฌ์กฐ๋ฅผ ์ดํ•ดํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด ๋ผˆ์˜ ๊ธฐ๊ณ„์  ํŠน์„ฑ์„ ๋ถ„์„ํ•˜๋ ค๋Š” ๋ชฉ์ ์œผ๋กœ ์ˆ˜ํ–‰๋˜์—ˆ์Šต๋‹ˆ๋‹ค. ์ด์ „ ์—ฐ๊ตฌ๋“ค์€ ์ฃผ๋กœ ๋ฏธ์„ธ์„ฌ์œ ์˜ ๊ธฐํ•˜ํ•™์  ํŠน์„ฑ ๋ฐ ๋ถ„์ž ๋ฐฐ

Model Physics
Electron beam-plasma interaction in a dusty plasma with excess   suprathermal electrons

Electron beam-plasma interaction in a dusty plasma with excess suprathermal electrons

๋ณธ ์—ฐ๊ตฌ๋Š” ์ „์ž ๋น”๊ณผ ๋จผ์ง€ ํ”Œ๋ผ์ฆˆ๋งˆ ๋‚ด ๊ณผ์—ด ์ „์ž์˜ ์ƒํ˜ธ์ž‘์šฉ์„ ๋ถ„์„ํ•˜๋Š” ๊ฒƒ์„ ๋ชฉํ‘œ๋กœ ํ•œ๋‹ค. ํŠนํžˆ, ์ด ์—ฐ๊ตฌ์—์„œ๋Š” ์ „์ž ์Œํ–ฅ ์†”๋ฆฌ๋“œ ๊ตฌ์กฐ์— ๋Œ€ํ•œ ๋น„์„ ํ˜• ํ˜„์ƒ์„ ํƒ๊ตฌํ•˜๋ฉฐ, ์ด๋ฅผ ํ†ตํ•ด ๋‹ค์–‘ํ•œ ๋งค๊ฐœ๋ณ€์ˆ˜์˜ ์˜ํ–ฅ์„ ์ดํ•ดํ•˜๊ณ ์ž ํ•œ๋‹ค. 1. ํ”Œ๋ผ์ฆˆ๋งˆ ๊ตฌ์„ฑ ์š”์†Œ ๋ณธ ์—ฐ๊ตฌ์—์„œ ๊ณ ๋ คํ•˜๋Š” ํ”Œ๋ผ์ฆˆ๋งˆ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ตฌ์„ฑ ์š”์†Œ๋กœ ์ด๋ฃจ์–ด์ ธ ์žˆ๋‹ค: ์ฐจ๊ฐ€์šด ์ธะตั€ั‚ial ๋“œ๋ฆฌํ”„ํŒ… ์ „์ž (๋น”) : ์ด๋“ค์€ ๋น” ์ „์ž๋ผ๊ณ  ๋ถˆ๋ฆฌ๋ฉฐ, ์ •์ƒ ์ƒํƒœ์—์„œ๋Š” ์ผ์ •ํ•œ ์†๋„๋ฅผ ์œ ์ง€ํ•œ๋‹ค. ์ฐจ๊ฐ€์šด ์ธะตั€ั‚ial ๋ฐฐ๊ฒฝ ์ „์ž : ํ”Œ๋ผ์ฆˆ๋งˆ ๋‚ด์—์„œ ์ฃผ์š” ๊ตฌ์„ฑ ์š”์†Œ๋กœ ์ž‘์šฉํ•˜๋ฉฐ, ์ผ๋ฐ˜์ ์œผ๋กœ ๊ฐ€์žฅ ๋งŽ์€

Physics Astrophysics
Two methods for the light curves extrema determination

Two methods for the light curves extrema determination

๋ณธ ๋…ผ๋ฌธ์€ ๋ณ€๊ด‘์„ฑ ๋ณ„์˜ ๋น› ๊ณก์„ ์—์„œ ๊ทน๋Œ€๊ฐ’๊ณผ ๊ทน์†Œ๊ฐ’์„ ๊ฒฐ์ •ํ•˜๊ธฐ ์œ„ํ•œ ๋‘ ๊ฐ€์ง€ ์ ‘๊ทผ ๋ฐฉ์‹์„ ์ œ์‹œํ•˜๊ณ  ์žˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ์ฒœ์ฒด๋ฌผ๋ฆฌํ•™ ๋ถ„์•ผ์—์„œ ์ค‘์š”ํ•œ ๋ฌธ์ œ ์ค‘ ํ•˜๋‚˜์ธ ๋ณ€๊ด‘์„ฑ ๋ณ„์˜ ์‹œ๊ฐ„ ์‹œ๋ฆฌ์ฆˆ ๋ฐ์ดํ„ฐ ๋ถ„์„์— ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ์œผ๋ฉฐ, ํŠนํžˆ ๋น„์ฃผ๊ธฐ์ ์ธ ๋ณ€๊ด‘ ๋˜๋Š” ์ฃผ๊ธฐ์ ์ธ ๋น› ๊ณก์„ ์„ ๋ณด์ด๋Š” ์ฒœ์ฒด์— ๋Œ€ํ•œ ๊ทน๊ฐ’ ๊ฒฐ์ • ๋ฐฉ๋ฒ•์„ ๋‹ค๋ฃจ๊ณ  ์žˆ๋‹ค. 1. ์„ ํ˜• ํšŒ๊ท€ ๋ถ„์„์„ ์ด์šฉํ•œ ๊ทน๋Œ€๊ฐ’ ๊ฒฐ์ • ์ฒซ ๋ฒˆ์งธ ์ ‘๊ทผ ๋ฐฉ์‹์€ ์„ ํ˜• ํšŒ๊ท€ ๋ชจ๋ธ์„ ์‚ฌ์šฉํ•˜์—ฌ ๊ทน๋Œ€ ๋ฐ ๊ทน์†Œ ์‹œ๊ฐ„์„ ๊ฒฐ์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์ด๋‹ค. ์ด ๋ฐฉ๋ฒ•์—์„œ๋Š” ๊ด€์ธก๋œ ๋ฐ์ดํ„ฐ๋ฅผ ๋ฒกํ„ฐ Y์™€ t๋กœ ํ‘œํ˜„ํ•˜๊ณ , ๊ฐ๊ฐ์˜ ์ธก์ • ๊ฐ’์— ๊ฐ€์ค‘์น˜ w

Physics Astrophysics
New Zealand pathway towards Asia-Pacific and global e-VLBI research and   development

New Zealand pathway towards Asia-Pacific and global e-VLBI research and development

๋ณธ ๋…ผ๋ฌธ์€ ๋‰ด์งˆ๋žœ๋“œ์˜ ์ฒœ๋ฌธํ•™ ๋ฐœ์ „ ๊ณผ์ •์—์„œ ์ค‘์š”ํ•œ ์ „ํ™˜์ ์ด ๋˜๋Š” ์˜คํด๋žœ๋“œ ๊ณต๊ณผ๋Œ€ํ•™(AUT)์˜ ์—ญํ• ์„ ์ง‘์ค‘์ ์œผ๋กœ ๋ถ„์„ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ, 2005๋…„๋ถ€ํ„ฐ ์‹œ์ž‘๋œ AUT์˜ ๋…ธ๋ ฅ์€ ๋‰ด์งˆ๋žœ๋“œ๊ฐ€ ๊ตญ์ œ์ ์ธ VLBI ๋„คํŠธ์›Œํฌ์— ํ•ฉ๋ฅ˜ํ•˜๋Š” ๊ณ„๊ธฐ๊ฐ€ ๋˜์—ˆ์œผ๋ฉฐ, ์ด๋Š” ์•„์‹œ์•„ ํƒœํ‰์–‘ ์ง€์—ญ์—์„œ ์ฒœ๋ฌธํ•™ ์—ฐ๊ตฌ ๊ฐœ๋ฐœ์„ ์ฃผ๋„ํ•˜๋Š” ์ค‘์š”ํ•œ ๋‹จ๊ณ„๋กœ ํ‰๊ฐ€๋ฉ๋‹ˆ๋‹ค. 1. ์—ญ์‚ฌ์  ๋ฐฐ๊ฒฝ ๋ฐ ์ดˆ๊ธฐ ๋ฐœ์ „ ๋…ผ๋ฌธ์€ ๋‰ด์งˆ๋žœ๋“œ์˜ ์ฒœ๋ฌธํ•™ ์—ญ์‚ฌ๋ฅผ ๊ฐ„๋žตํ•˜๊ฒŒ ์†Œ๊ฐœํ•˜๋ฉฐ, ํŠนํžˆ 1948๋…„ ํ˜ธ์ฃผ CSIRO์—์„œ ์ง„ํ–‰๋œ ๋ฐ”๋‹ค๋ฅผ ๊ฑฐ์šธ๋กœ ์‚ฌ์šฉํ•œ ๊ฐ„์„ญ๊ณ„ ์„ค์น˜ ์‹คํ—˜์„ ์–ธ๊ธ‰ํ•ฉ๋‹ˆ๋‹ค. ์ด ์‹คํ—˜์€ ๋ผ๋””์˜คํŒŒ ์›์ฒœ์˜ ์œ„์น˜

Physics Astrophysics
Marching of Freely Falling Plates

Marching of Freely Falling Plates

'์ž์œ  ๋‚™ํ•˜ํ•˜๋Š” ํŒ์˜ ํ–‰์ง„: ์ˆ˜์น˜ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๋ถ„์„'์€ ์œ ์ฒด ์—ญํ•™๊ณผ ๋น„์„ ํ˜• ๋™์—ญํ•™ ๋ถ„์•ผ์—์„œ ์ค‘์š”ํ•œ ๋ฌธ์ œ์ธ ์ž์œ  ๋‚™ํ•˜ํ•˜๋Š” ํŒ์˜ ์šด๋™์— ๋Œ€ํ•œ ์‹ฌ์ธต์ ์ธ ์—ฐ๊ตฌ๋ฅผ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ๋‹ค์–‘ํ•œ ๋ฌผ๋ฆฌ์  ์กฐ๊ฑด ํ•˜์—์„œ ํŒ์ด ์–ด๋–ป๊ฒŒ ํ–‰๋™ํ•˜๋Š”์ง€, ๊ทธ๋ฆฌ๊ณ  ์ด๋Ÿฌํ•œ ํ–‰๋™์ด ์ฃผ๋ณ€ ์œ ์ฒด์™€ ์–ด๋–ค ์ƒํ˜ธ์ž‘์šฉ์„ ํ•˜๋Š”์ง€๋ฅผ ํƒ๊ตฌํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ํŒ์˜ ๊ถค์ ๊ณผ ์šด๋™ ์ž์œ  ๋‚™ํ•˜ํ•˜๋Š” ํŒ์˜ ๊ถค์ ์€ ๋งค์šฐ ๋ณต์žกํ•˜๋ฉฐ, ์ด๋Š” ๋ ˆ์ด๋†€์ฆˆ ์ˆ˜์น˜(Reynolds number)์™€ ํ”„๋ผ์šฐ๋“œ ์ˆ˜(Froude number)์— ํฌ๊ฒŒ ์˜์กดํ•ฉ๋‹ˆ๋‹ค. ๋†’์€ ๋ ˆ์ด๋†€์ฆˆ ์ˆ˜์—์„œ ์†Œํ˜• ํ”„๋ผ์šฐ๋“œ ์ˆ˜๋ฅผ ๊ฐ€์ง„ ํŒ์€ ์ง„

Physics
No Image

Partition function of 1-, 2-, and 3-D monatomic ideal gas: A simple and comprehensive review

๋ณธ ๋…ผ๋ฌธ์€ ์›์ž ๊ธฐ์ฒด์˜ ๋ถ„ํ•  ํ•จ์ˆ˜๋ฅผ 1์ฐจ์›, 2์ฐจ์›, ๊ทธ๋ฆฌ๊ณ  3์ฐจ์›์—์„œ ๊ฐ๊ฐ ํƒ๊ตฌํ•˜๊ณ  ์ด๋ฅผ ํ†ตํ•ด ์ฐจ์›์— ๋”ฐ๋ฅธ ๊ณตํ†ต์ ๊ณผ ์ฐจ์ด์ ์„ ๋ถ„์„ํ•œ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ๊ณ ์ „์ ์ธ ๋ฌผ๋ฆฌํ•™์  ์ ‘๊ทผ ๋ฐฉ์‹์„ ๋ฐ”ํƒ•์œผ๋กœ ํ•˜๋ฉฐ, ํŠนํžˆ ๋งฅ์Šค์›ฐ ๋ณผ์ธ ๋งŒ ํ†ต๊ณ„ํ•™์˜ ์›๋ฆฌ๋ฅผ ํ™œ์šฉํ•˜์—ฌ ์ž…์ž์˜ ์ƒํƒœ ์ˆ˜์™€ ์—๋„ˆ์ง€ ๊ฐ„์˜ ๊ด€๊ณ„๋ฅผ ์ •๋ฆฝํ•˜๊ณ  ์ด๋ฅผ ํ†ตํ•ด ๋ถ„ํ•  ํ•จ์ˆ˜๋ฅผ ๋„์ถœํ•˜๋Š” ๋ฐฉ๋ฒ•๋ก ์„ ์ œ์‹œํ•œ๋‹ค. 1. ์ด๋ก ์  ๋ฐฐ๊ฒฝ ๋…ผ๋ฌธ์€ ฮ“ ํ†ตํ•ฉ๊ณผ ๋งฅ์Šค์›ฐ ๋ณผ์ธ ๋งŒ ํ†ต๊ณ„ํ•™์— ๋Œ€ํ•œ ์ดํ•ด๊ฐ€ ํ•„์š”ํ•˜๋‹ค๋Š” ์ ์—์„œ ์ถœ๋ฐœํ•œ๋‹ค. ์ด๋Ÿฌํ•œ ์ˆ˜ํ•™์  ๊ธฐ๋ฐ˜ ์œ„์—์„œ, ์›์ž ๊ธฐ์ฒด์˜ ๋ถ„ํ•  ํ•จ์ˆ˜๋ฅผ ๊ณ„์‚ฐํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ํƒ๊ตฌํ•œ๋‹ค. ์ด๋ก ์ ์œผ๋กœ, ๋ถ„ํ• 

Condensed Matter Physics
A Rejoinder on Energy versus Impact Indicators

A Rejoinder on Energy versus Impact Indicators

: ๋ณธ ๋…ผ๋ฌธ์€ ๊ณผํ•™ ์—ฐ๊ตฌ์˜ ์˜ํ–ฅ๋ ฅ์„ ์ธก์ •ํ•˜๋Š” ์ƒˆ๋กœ์šด ์ง€ํ‘œ์ธ ํ†ตํ•ฉ ์˜ํ–ฅ ์ง€ํ‘œ(I3)๋ฅผ ์ œ์•ˆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Š” ๊ธฐ์กด์˜ ์ €๋„ ์ธ์šฉ ์ ์ˆ˜(JCS)์™€ ๋ถ„์•ผ ์ธ์šฉ ์ ์ˆ˜(FCS)๋ฅผ ํ‰๊ท ์œผ๋กœ ์‚ฌ์šฉํ•˜๋Š” ๋ฐฉ์‹๊ณผ ๋‹ฌ๋ฆฌ, ๋‘ ํžˆํŠธ(citations)์˜ ์˜ํ–ฅ์„ ํ•ฉ์œผ๋กœ ๊ณ„์‚ฐํ•ฉ๋‹ˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ ‘๊ทผ๋ฒ•์€ ์ถฉ๋Œ ์‹œ ๋ชจ๋ฉ˜ํ…€์˜ ๋ฒกํ„ฐ ํ•ฉ๊ณผ ์œ ์‚ฌํ•œ ๊ฐœ๋…์„ ์ ์šฉํ•˜๋ฉฐ, ์ธ์šฉ ๋ถ„์„์—์„œ ์Šค์นผ๋ผ ํ•ฉ์„ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์ด ํƒ€๋‹นํ•˜๋‹ค๋Š” ์ฃผ์žฅ์„ ํ•ฉ๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์—์„œ๋Š” I3๋ฅผ ๊ฐœ๋ฐœํ•˜๋ฉด์„œ Prathap (2011a)์˜ ์—”ํŠธ๋กœํ”ผ ๊ฐœ๋…์ด ํ™•๋ฅ ์  ์—”ํŠธ๋กœํ”ผ๊ฐ€ ์•„๋‹Œ ์—ด์—ญํ•™์  ์—”ํŠธ๋กœํ”ผ๋ผ๋Š” ์ ์„ ์ง€์ ํ•ฉ๋‹ˆ๋‹ค. ์ด

Physics Computer Science Digital Libraries
Unsteady Hydromagnetic Flow of Viscoelastic Fluid down an Open Inclined   Channel

Unsteady Hydromagnetic Flow of Viscoelastic Fluid down an Open Inclined Channel

: ๋ณธ ๋…ผ๋ฌธ์€ ๊ฐœ๋ฐฉํ˜• ๊ฒฝ์‚ฌ ์ฑ„๋„ ๋‚ด์—์„œ ์›”ํ„ฐ ์œ ์ฒด์˜ ๋น„์ •์ƒ ์ˆ˜๋ ฅํ•™์  ํ๋ฆ„์„ ์—ฐ๊ตฌํ•˜๋ฉฐ, ํŠนํžˆ ๊ท ์ผํ•œ ์ˆ˜์ง ์ž๊ธฐ์žฅ์ด ์ด ํ๋ฆ„์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ๋ถ„์„ํ•œ๋‹ค. ์›”ํ„ฐ ์œ ์ฒด๋Š” ๋น„๋‰ดํ„ด ์œ ์ฒด ์ค‘ ํ•˜๋‚˜๋กœ, ๊ณ ์ „์ ์ธ ์‘๋ ฅ ๋ณ€ํ˜•๋ฅ  ๊ด€๊ณ„๋ฅผ ๋”ฐ๋ฅด์ง€ ์•Š๋Š” ํŠน์„ฑ์„ ๊ฐ€์ง„๋‹ค. ์ด๋Ÿฌํ•œ ๋ฌผ์งˆ์€ ํ”Œ๋ผ์Šคํ‹ฑ ์„ฑํ˜•, ์„ฌ์œ  ์ œ์กฐ ๋“ฑ ๋‹ค์–‘ํ•œ ์‚ฐ์—…์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š”๋ฐ, ์ด ์—ฐ๊ตฌ๋Š” ์›”ํ„ฐ ์œ ์ฒด์˜ ํ๋ฆ„์— ๋Œ€ํ•œ ์ดํ•ด๋ฅผ ๊นŠ๊ฒŒ ํ•˜๊ธฐ ์œ„ํ•ด ์ˆ˜ํ–‰๋˜์—ˆ๋‹ค. ๋…ผ๋ฌธ์—์„œ๋Š” ๋ผํ”Œ๋ผ์Šค ๋ณ€ํ™˜๊ณผ ์œ ํ•œ ํ‘ธ๋ฆฌ์— ์‚ฌ์ธ ๋ณ€ํ™˜ ๊ธฐ๋ฒ•์„ ์‚ฌ์šฉํ•˜์—ฌ ์†๋„ ๋ถ„ํฌ๋ฅผ ํ‰๊ฐ€ํ•œ๋‹ค. ์ด๋Ÿฌํ•œ ์ˆ˜ํ•™์  ๋ฐฉ๋ฒ•์€ ๋ณต์žกํ•œ ๋ฏธ๋ถ„ ๋ฐฉ์ •์‹์„ ํ•ด๊ฒฐํ•˜

Physics Computational Engineering Computer Science
A possible use of the Khas protractor

A possible use of the Khas protractor

: ๋ณธ ๋…ผ๋ฌธ์€ ๊ณ ๋Œ€ ์ด์ง‘ํŠธ ๊ฑด์ถ•๊ฐ€ ์นด์˜ ๋ฌด๋ค์—์„œ ๋ฐœ๊ฒฌ๋œ ๋ฌผ์ฒด๋ฅผ ์ž(protractor)๋กœ ๊ฐ„์ฃผํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด ๊ฒฝ์‚ฌ๋ฉด ๊ฐ๋„๋ฅผ ์ธก์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•œ๋‹ค. ์ด๋Ÿฌํ•œ ๊ฐ€์„ค์€ ๊ณ ๋Œ€ ์ด์ง‘ํŠธ ์„๊ณต ๊ธฐ์ˆ ๊ณผ ๊ฑด์ถ•์— ๋Œ€ํ•œ ์ดํ•ด๋ฅผ ๋„“ํžˆ๋Š” ๋ฐ ์ค‘์š”ํ•œ ์˜๋ฏธ๊ฐ€ ์žˆ๋‹ค. 1. ์นด์˜ ๋ฌด๋ค์—์„œ ๋ฐœ๊ฒฌ๋œ ๋ฌผ์ฒด ์นด์™€ ๊ทธ์˜ ์•„๋‚ด ๋ฉ”๋ฆฌํŠธ์˜ ๋ฌด๋ค์€ 18์™•์กฐ ์‹œ๋Œ€์˜ ์™„๋ฒฝํ•˜๊ฒŒ ๋ณด์กด๋œ ๋ฌด๋ค์œผ๋กœ, ์ด๊ณณ์—์„œ๋Š” ๊ฑด์ถ•๊ฐ€ ์นด๊ฐ€ ์ผ์ƒ์ ์œผ๋กœ ์‚ฌ์šฉํ•˜๋˜ ์—ฌ๋Ÿฌ ๋„๊ตฌ๋“ค์ด ๋ฐœ๊ฒฌ๋˜์—ˆ๋‹ค. ํŠนํžˆ ๋ชฉ์žฌ๋กœ ๋งŒ๋“ค์–ด์ง„ ์ ‘์ด์‹ ๊ด€์ ˆ์„ ๊ฐ€์ง„ ์ž(cubit)์™€ ๊ธ€์“ฐ๊ธฐ ๋„๊ตฌ ๋“ฑ์ด ํฌํ•จ๋˜์–ด ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ๋ฌผํ’ˆ๋“ค์€ ์นด์˜ ์ง

Physics Mathematics
Multiscale approach for bone remodeling simulation based on finite   element and neural network computation

Multiscale approach for bone remodeling simulation based on finite element and neural network computation

: ๋ณธ ๋…ผ๋ฌธ์€ ๊ณจ ์žฌ๊ตฌ์„ฑ ๊ณผ์ •์„ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ํ•˜๊ธฐ ์œ„ํ•œ ์ƒˆ๋กœ์šด ๋‹ค์ค‘ ๊ทœ๋ชจ ์ ‘๊ทผ ๋ฐฉ์‹, ์ฆ‰ ํ•˜์ด๋ธŒ๋ฆฌ๋“œ FENN(Finite Element and Neural Network) ๋ฐฉ๋ฒ•์„ ์ œ์•ˆํ•œ๋‹ค. ์ด ๋ฐฉ๋ฒ•์˜ ํ•ต์‹ฌ์€ ์œ ํ•œ ์š”์†Œ ๋ถ„์„๊ณผ ์ธ๊ณต ์‹ ๊ฒฝ๋ง ๊ณ„์‚ฐ์„ ๊ฒฐํ•ฉํ•˜์—ฌ ๊ณจ ์žฌ๊ตฌ์„ฑ ๊ณผ์ •์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๋ณต์žกํ•œ ํ˜„์ƒ์„ ํšจ๊ณผ์ ์œผ๋กœ ๋ชจ๋ธ๋งํ•˜๊ณ  ์‹œ๋ฎฌ๋ ˆ์ด์…˜ํ•  ์ˆ˜ ์žˆ๋„๋ก ํ•˜๋Š” ๊ฒƒ์ด๋‹ค. 1. ๋‹ค์ค‘ ๊ทœ๋ชจ ์ ‘๊ทผ ๋ฐฉ์‹์˜ ํ•„์š”์„ฑ ๊ณจ ์žฌ๊ตฌ์„ฑ์€ ๋ผˆ์˜ ๋ฏธ์„ธ ๊ตฌ์กฐ๋ถ€ํ„ฐ ๊ฑฐ์‹œ์  ํ–‰๋™๊นŒ์ง€ ๋‹ค์–‘ํ•œ ๊ทœ๋ชจ์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๋ณต์žกํ•œ ๊ณผ์ •์ด๋‹ค. ์ด ๊ณผ์ •์„ ์ •ํ™•ํ•˜๊ฒŒ ๋ชจ๋ธ๋งํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๊ฐ ์ˆ˜์ค€์—์„œ์˜ ์ƒํ˜ธ

Quantitative Biology Model Network Physics
Gravitational constant calculation methodologies

Gravitational constant calculation methodologies

1. ์—ฐ๊ตฌ ๋ฐฐ๊ฒฝ ์ค‘๋ ฅ ์ƒ์ˆ˜(G)๋Š” ์ค‘๋ ฅ์„ ์ดํ•ดํ•˜๊ณ , ์šฐ์ฃผ์™€ ์ง€๊ตฌ ๋‚ด์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๋‹ค์–‘ํ•œ ํ˜„์ƒ์„ ์„ค๋ช…ํ•˜๋Š”๋ฐ ํ•„์ˆ˜์ ์ธ ๋ฌผ๋ฆฌ ์ƒ์ˆ˜์ด๋‹ค. ์ด ๋…ผ๋ฌธ์€ G์˜ ์ •ํ™•ํ•œ ๊ณ„์‚ฐ ๋ฐฉ๋ฒ•์„ ๊ฐœ๋ฐœํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด ๊ณผํ•™ ๋ฐ ๊ณตํ•™ ๋ถ„์•ผ์— ์ค‘์š”ํ•œ ์˜ํ–ฅ์„ ๋ฏธ์น  ์ˆ˜ ์žˆ๋Š” ๊ฐ€๋Šฅ์„ฑ์„ ํƒ์ƒ‰ํ•œ๋‹ค. 2. ์—ฐ๊ตฌ ๋ชฉ์  ๋ณธ ์—ฐ๊ตฌ๋Š” ์ฃผ๋กœ ์„ธ ๊ฐ€์ง€ ์ ‘๊ทผ ๋ฐฉ์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ์ค‘๋ ฅ ์ƒ์ˆ˜(G)๋ฅผ ๊ณ„์‚ฐํ•˜๋Š” ๋ฐฉ๋ฒ•๋ก ์„ ๊ฒ€ํ† ํ•˜๋ฉฐ, ํŠนํžˆ ๋น„๊ท ์ผ ๊ฐ€์Šค ํ๋ฆ„์ด G ๊ฐ’์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ๋ถ„์„ํ•˜๊ณ ์ž ํ•œ๋‹ค. ์ด๋ฅผ ํ†ตํ•ด G์˜ ์ •ํ™•ํ•œ ๊ฐ’์„ ์–ป๊ธฐ ์œ„ํ•œ ์ƒˆ๋กœ์šด ๋ฐฉ๋ฒ•๋ก ์„ ์ œ์‹œํ•œ๋‹ค. 3. ์—ฐ๊ตฌ ๋ฐฉ๋ฒ• ๋ฐฉ๋ฒ• 1: ๋ถˆ์กฐํ™” ์ง„๋™

Physics
Computational Fluid Dynamics In GARUDA Grid Environment

Computational Fluid Dynamics In GARUDA Grid Environment

๋ณธ ๋…ผ๋ฌธ์€ ๊ณ„์‚ฐ ์œ ์ฒด์—ญํ•™(CFD) ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜์˜ ํšจ์œจ์ ์ธ ๊ตฌํ˜„๊ณผ ๊ทธ๋ฆฌ๋“œ ์ปดํ“จํŒ… ํ™˜๊ฒฝ์˜ ์ค‘์š”์„ฑ์„ ๊ฐ•์กฐํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ, ๊ตญ๊ฐ€ ์ง€์‹ ๋„คํŠธ์›Œํฌ(NKN) ๊ธฐ๋ฐ˜์˜ GARUDA ๊ทธ๋ฆฌ๋“œ ํ™˜๊ฒฝ์„ ํ™œ์šฉํ•˜์—ฌ CFD ๋ชจ๋ธ์„ ๊ตฌํ˜„ํ•จ์œผ๋กœ์จ, ๊ณ ์„ฑ๋Šฅ ์ปดํ“จํŒ…(HPC) ์ž์› ๋ถ€์กฑ๊ณผ ๋ณต์žกํ•œ ๋„๊ตฌ ๊ฒฐํ•ฉ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๋ ค๋Š” ์‹œ๋„๊ฐ€ ๋‹๋ณด์ž…๋‹ˆ๋‹ค. 1. CFD์™€ HPC์˜ ๊ด€๊ณ„ CFD๋Š” ๋ณต์žกํ•œ ์œ ์ฒด ์—ญํ•™ ๋ฌธ์ œ๋ฅผ ์ˆ˜์น˜์ ์œผ๋กœ ๋ชจ๋ธ๋งํ•˜๊ณ  ๋ถ„์„ํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ๋˜๋Š” ๊ธฐ์ˆ ๋กœ, ์ด๋ฅผ ์ˆ˜ํ–‰ํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ๋Œ€๊ทœ๋ชจ ๊ณ„์‚ฐ ์ž์›์ด ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค. ์ด์— ๋”ฐ๋ผ CFD๋Š” HPC ๋ฐœ์ „์˜ ํ•ต์‹ฌ ๋™๋ ฅ ์ค‘ ํ•˜๋‚˜์ž…

Physics
QCDMAPT_F: Fortran version of QCDMAPT package

QCDMAPT_F: Fortran version of QCDMAPT package

QCDMAPT F๋Š” ์–‘์ž ์ƒ‰์—ญํ•™(QCD) ๋ถ„์•ผ์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š” ํ”„๋กœ๊ทธ๋žจ ํŒจํ‚ค์ง€๋กœ, ์ด์ „ ๋ฒ„์ „์ธ Maple ์‹œ์Šคํ…œ์šฉ QCDMAPT๋ฅผ Fortran์œผ๋กœ ๊ตฌํ˜„ํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ด ํŒจํ‚ค์ง€๋Š” ๊ฐ•ํ•œ ์ƒํ˜ธ์ž‘์šฉ์˜ ๋ณต์žก์„ฑ์„ ๋‹ค๋ฃจ๋Š” ๋ฐ ์žˆ์–ด ํ•ต์‹ฌ์ ์ธ ๋„๊ตฌ์ด๋ฉฐ, ํŠนํžˆ ์ŠคํŽ™ํŠธ๋Ÿผ ํ•จ์ˆ˜ ๊ณ„์‚ฐ์— ์ค‘์ ์„ ๋‘๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ํ”„๋กœ๊ทธ๋žจ ๊ฐœ์š” QCDMAPT F๋Š” Fortran 77 ์ด์ƒ์„ ์ง€์›ํ•˜๋Š” ๋ชจ๋“  ์ปดํ“จํ„ฐ์™€ ์šด์˜ ์ฒด์ œ์—์„œ ์‹คํ–‰๋  ์ˆ˜ ์žˆ์œผ๋ฉฐ, CERNLIB์˜ MATHLIB ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค. ์ด ํŒจํ‚ค์ง€๋Š” ๋ฉ”์ธ ํ”„๋กœ๊ทธ๋žจ(QCDMAPT F.f)๊ณผ ๋‘ ๊ฐœ์˜

HEP-PH HEP-TH Physics
Measuring the Earth-Sun distance during a lunar eclipse

Measuring the Earth-Sun distance during a lunar eclipse

๋ณธ ๋…ผ๋ฌธ์€ ๊ณ ๋Œ€ ์ฒœ๋ฌธํ•™์ž๋“ค์ด ์‚ฌ์šฉํ–ˆ๋˜ ์ง€๊ตฌ ํƒœ์–‘ ๊ฑฐ๋ฆฌ ์ธก์ •๋ฒ•์„ ํ˜„๋Œ€์ ์ธ ๊ด€์ ์—์„œ ์žฌํ•ด์„ํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด ์ฒœ๋ฌธ ๋‹จ์œ„์˜ ์ •ํ™•ํ•œ ๊ฐ’์„ ์ถ”์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ๋‹ฌ ์‹ ๋™์•ˆ ๋ฐœ์ƒํ•˜๋Š” ํ˜„์ƒ์„ ๊ธฐ๋ฐ˜์œผ๋กœ ํ•˜๋ฉฐ, ํŠนํžˆ ์ง€๊ตฌ ๊ทธ๋ฆผ์ž์˜ ๋ชจ์–‘๊ณผ ํฌ๊ธฐ๋ฅผ ๋ถ„์„ํ•˜์—ฌ ์ง€๊ตฌ์™€ ํƒœ์–‘ ์‚ฌ์ด์˜ ๊ฑฐ๋ฆฌ๋ฅผ ์ธก์ •ํ•˜๋Š” ๋ฐ ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ๋ฐฉ๋ฒ•๋ก  ๋‹ฌ ์‹ ๋™์•ˆ ์ง€๊ตฌ๊ฐ€ ๋‹ฌ์„ ๊ฐ€๋ฆฌ๋Š” ํ˜„์ƒ์„ ๊ด€์ฐฐํ•จ์œผ๋กœ์จ, ์ง€๊ตฌ ๊ทธ๋ฆผ์ž์˜ ๋ชจ์–‘๊ณผ ํฌ๊ธฐ๋ฅผ ํŒŒ์•…ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋Š” ๋‹ฌ์˜ ๊ฐ๋„์™€ ์ง€๊ตฌ ๊ทธ๋ฆผ์ž ๋ฐ˜์ง€๋ฆ„ (RโŠ•,M)๋ฅผ ์ธก์ •ํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค. ์ €์ž๋Š” Hipparcos

Physics Astrophysics
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Misure quantitative del seeing atmosferico

์ด ๋…ผ๋ฌธ์€ ๋Œ€๊ธฐ๊ด‘ํ•™ ํ˜„์ƒ, ํŠนํžˆ Seeing๊ณผ ๊ด€๋ จ๋œ ์ด๋ฏธ์ง€ ์šด๋™ ๋ฐ ๋ธ”๋Ÿฌ๋ง์— ๋Œ€ํ•œ ์‹ฌ๋„ ์žˆ๋Š” ๋ถ„์„์„ ์ œ๊ณตํ•œ๋‹ค. ์ด๋Š” ์ฒœ๋ฌธ ๊ด€์ธก์—์„œ ์ค‘์š”ํ•œ ์š”์†Œ๋กœ, ๋ง์›๊ฒฝ์˜ ์„ฑ๋Šฅ๊ณผ ์ง์ ‘์ ์œผ๋กœ ์—ฐ๊ด€๋˜์–ด ์žˆ๋‹ค. 1. ๋Œ€๊ธฐ๊ด‘ํ•™ ํ˜„์ƒ ์ดํ•ด ๋Œ€๊ธฐ๊ด‘ํ•™์€ ๊ด‘์„ ์ด ์ง€๊ตฌ ๋Œ€๊ธฐ๋ฅผ ํ†ต๊ณผํ•˜๋ฉด์„œ ๋ฐœ์ƒํ•˜๋Š” ๋‹ค์–‘ํ•œ ํ˜„์ƒ์„ ๋‹ค๋ฃจ๋ฉฐ, ์ด ์ค‘ Seeing์€ ํŠนํžˆ ์ค‘์š”ํ•˜๋‹ค. Seeing์€ ๋Œ€๊ธฐ์˜ ํˆฌ๋ช…๋„์™€ ๊ด€๋ จ๋œ ๊ฐœ๋…์œผ๋กœ, ๋ง์›๊ฒฝ์„ ํ†ตํ•ด ๋ณผ ์ˆ˜ ์žˆ๋Š” ์ฒœ์ฒด ์ด๋ฏธ์ง€์˜ ์„ ๋ช…๋„๋ฅผ ๊ฒฐ์ •ํ•œ๋‹ค. ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” Seeing์ด ์–ด๋–ป๊ฒŒ ๋ฐœ์ƒํ•˜๊ณ , ์ด๋ฅผ ์ธก์ •ํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์„ค๋ช…ํ•œ๋‹ค. 2. Fried

Astrophysics Physics
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Stone structures in the Syrian Desert

: ์ด ์—ฐ๊ตฌ๋Š” ์‹œ๋ฆฌ์•„ ์‚ฌ๋ง‰์—์„œ ๋ฐœ๊ฒฌ๋œ ๋‚ ๊ฐœ ๋‹ฌ๋ฆฐ ๊ทธ๋ฌผ(kite)๊ณผ ๊ด€๋ จ๋œ ์„์กฐ ๊ตฌ์กฐ๋ฌผ์„ ์ค‘์‹ฌ์œผ๋กœ ๊ณ ๋Œ€ ์ธ๊ฐ„์˜ ์ƒํ™œ ๋ฐฉ์‹์— ๋Œ€ํ•œ ํ†ต์ฐฐ๋ ฅ์„ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. ์ด๋“ค ๊ตฌ์กฐ๋ฌผ์€ ๋‹จ์ˆœํžˆ ๋™๋ฌผ์„ ํฌํšํ•˜๊ณ  ์‚ดํ•ดํ•˜๋Š” ๋ฐ๋งŒ ์‚ฌ์šฉ๋˜์ง€ ์•Š๊ณ , ์‹๋Ÿ‰ ๋ณด์กด ๋ฐ ์‚ฌ๋ƒฅ๊ฐ ์œ ์ง€์—๋„ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ–ˆ์Šต๋‹ˆ๋‹ค. ์ด๋Ÿฌํ•œ ๋ฐœ๊ฒฌ์€ ๊ณ ๋Œ€ ์ธ๋ฅ˜๊ฐ€ ์–ด๋–ป๊ฒŒ ์ž์›์„ ๊ด€๋ฆฌํ•˜๊ณ  ์ƒ์กด์— ํ•„์š”ํ•œ ๊ธฐ์ˆ ์„ ๋ฐœ์ „์‹œ์ผฐ๋Š”์ง€๋ฅผ ์ดํ•ดํ•˜๋Š” ๋ฐ ์ค‘์š”ํ•œ ๋‹จ์„œ๋ฅผ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. ๋‚ ๊ฐœ ๋‹ฌ๋ฆฐ ๊ทธ๋ฌผ์˜ ์กด์žฌ๋Š” ๋ฐฉ์‚ฌ์„ฑ ํƒ„์†Œ ๋ถ„์„์„ ํ†ตํ•ด ํ™•์ธ๋˜์—ˆ์œผ๋ฉฐ, ๊ฐ€์žฅ ์˜ค๋ž˜๋œ ๊ตฌ์กฐ๋ฌผ์€ ์•ฝ 9์ฒœ ๋…„ ์ „๋ถ€ํ„ฐ 11์ฒœ ๋…„ ์ „๊นŒ์ง€ ๊ฑฐ์Šฌ๋Ÿฌ ์˜ฌ๋ผ๊ฐ‘๋‹ˆ๋‹ค

Physics
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Study on radon and radium concentrations in drinking water in west region of Iran

: ๋ณธ ์—ฐ๊ตฌ๋Š” ํˆฌ๋ฅด์‚ฐ ์ง€์—ญ์˜ ์ง€ํ•˜์ˆ˜ ๋‚ด ๋ผ๋ˆ๊ณผ ๋ฐฉ์‚ฌ์šฐ์˜ ๋†๋„๋ฅผ ์ธก์ •ํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด ์ธ์ฒด์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ๋ถ„์„ํ•˜๋Š” ๊ฒƒ์„ ๋ชฉํ‘œ๋กœ ํ•ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ํŠนํžˆ ๋ผ๋ˆ์ด ํ์•” ๋ฐ ์œ„์•” ๋ฐœ๋ณ‘๋ฅ  ์ฆ๊ฐ€์™€ ๊ด€๋ จ์ด ์žˆ๋‹ค๋Š” ์ ์„ ๊ฐ•์กฐํ•˜๋ฉฐ, ๋ฌผ ๊ณต๊ธ‰ ๊ณผ์ •์—์„œ ๊ณ ๊ฐ์—๊ฒŒ ๋„๋‹ฌํ•œ ํ›„, ํก์ž…๊ณผ ์„ญ์ทจ๋ฅผ ํ†ตํ•ด ์ธ๊ฐ„ ๋…ธ์ถœ์ด ์ผ์–ด๋‚˜๋Š” ๊ฒƒ์„ ๋ถ„์„ํ•ฉ๋‹ˆ๋‹ค. ๋ผ๋ˆ์€ ์ง€ํ•˜์ˆ˜ ๋‚ด์— ์กด์žฌํ•˜๋Š” ๋ฐฉ์‚ฌ์„ฑ ๋™์œ„์›์†Œ๋กœ, ์ง€ํ‘œ๋ฉด ์ˆ˜์งˆ๋ณด๋‹ค ๋†’๊ฒŒ ๋‚˜ํƒ€๋‚ฉ๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ์—์„œ๋Š” PRASSI ์‹œ์Šคํ…œ ๋ชจ๋ธ 5S๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌผ ์ƒ˜ํ”Œ ๋‚ด ๋ผ๋ˆ ๋†๋„๋ฅผ ์ธก์ •ํ–ˆ์Šต๋‹ˆ๋‹ค. ์ด ์‹œ์Šคํ…œ์€ ๋†’์€ ๊ฐ๋„์™€ ์งง์€ ์‘๋‹ต ์‹œ๊ฐ„์„

Physics
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Top-quark pair cross-section measurement in the lepton+jets channel

์ด ๋…ผ๋ฌธ์€ LHC ์ดˆ๊ธฐ ๋ฐ์ดํ„ฐ ์ˆ˜์ง‘ ๊ธฐ๊ฐ„ ๋™์•ˆ tt ์Œ์˜ ๊ต์ฐจ ์ ˆ๋‹จ(cross section) ์ธก์ •์— ๋Œ€ํ•œ ์‹ฌ๋„ ์žˆ๋Š” ๋ถ„์„์„ ์ œ๊ณตํ•œ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ํผํŠธ๋ฅด๋ธŒ QCD ์˜ˆ์ธก์˜ ์ •ํ™•์„ฑ์„ ๊ฒ€์ฆํ•˜๊ณ , ์ดˆ์›” ํ‘œ์ค€ ๋ชจ๋ธ ๋ฌผ๋ฆฌํ•™ ํƒ์ƒ‰์—์„œ ์ค‘์š”ํ•œ ๋ฐฐ๊ฒฝ์„ ํ˜•์„ฑํ•˜๋ฉฐ, ์ƒˆ๋กœ์šด ๋ฌผ๋ฆฌํ•™ ํƒ์‚ฌ์˜ ์ฒซ๊ฑธ์Œ์ด ๋˜๋Š” ์ธก์ •์— ์ค‘์ ์„ ๋‘”๋‹ค. 1. ์ด๋ก ์  ๋ฐฐ๊ฒฝ ๋ฐ ์ค‘์š”์„ฑ tt ์Œ์˜ ๊ต์ฐจ ์ ˆ๋‹จ์€ pp ์ถฉ๋Œ์—์„œ ์œ„ ์ฟผํฌ์™€ ๋ฐ˜์œ„ ์ฟผํฌ๊ฐ€ ์ƒ์„ฑ๋˜๋Š” ํ™•๋ฅ ์„ ๋‚˜ํƒ€๋‚ธ๋‹ค. ์ด ์ธก์ •์€ ํผํŠธ๋ฅด๋ธŒ QCD ์˜ˆ์ธก๊ณผ ์ง์ ‘ ๋น„๊ตํ•˜์—ฌ ๊ทธ ์ •ํ™•๋„๋ฅผ ๊ฒ€์ฆํ•˜๋Š” ๋ฐ ์‚ฌ์šฉ๋œ๋‹ค. ๋˜ํ•œ, tt ์ƒ์‚ฐ์€ ์ดˆ์›” SM ๋ฌผ

Physics HEP-EX
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Abusir: from Pliny the Elder to Google Maps

: ๋ณธ ๋…ผ๋ฌธ์€ ์ด์ง‘ํŠธ ์•„๋ถ€์‹œ๋ฅด ์œ ์ ์ง€์˜ ๋ฐœ๊ตด๊ณผ ์—ฐ๊ตฌ ๊ณผ์ •์„ ์ค‘์‹ฌ์œผ๋กœ, ํ˜„๋Œ€ ๊ธฐ์ˆ ์ธ ๊ตฌ๊ธ€ ๋งต ์œ„์„ฑ ์ด๋ฏธ์ง€ ์ฒ˜๋ฆฌ๋ฅผ ํ†ตํ•ด ๊ณ ๊ณ ํ•™์  ๋ฐœ๊ฒฌ์ด ์–ด๋–ป๊ฒŒ ์ด๋ฃจ์–ด์งˆ ์ˆ˜ ์žˆ๋Š”์ง€๋ฅผ ๊นŠ์ด ์žˆ๊ฒŒ ๋ถ„์„ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ, ์ฒด์ฝ” ์›์ •๋Œ€์™€ ์ดํƒˆ๋ฆฌ์•„ ํ•™์ž๋“ค์˜ ์—ญํ• ์— ์ดˆ์ ์„ ๋งž์ถ”์–ด ์•„๋ถ€์‹œ๋ฅด ํ”ผ๋ผ๋ฏธ๋“œ ๋ณตํ•ฉ์ฒด์˜ ์—ญ์‚ฌ์  ๋ฐฐ๊ฒฝ๊ณผ ํ˜„๋Œ€ ์—ฐ๊ตฌ ๋ฐฉ๋ฒ•๋ก ์„ ๋‹ค๋ฃจ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์€ ์•„๋ถ€์‹œ๋ฅด ์œ ์ ์ง€๊ฐ€ 14๊ฐœ์˜ ํ”ผ๋ผ๋ฏธ๋“œ๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ์œผ๋ฉฐ, ์ด๋“ค ๊ตฌ์กฐ๋ฌผ์˜ ํ’ˆ์งˆ์ด ์ œ4์™•์กฐ๋ณด๋‹ค ์—ด๋“ฑํ•˜๋‹ค๋Š” ์ ์„ ๊ฐ•์กฐํ•ฉ๋‹ˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ฐจ์ด๋Š” ์™•๊ถŒ์˜ ์•ฝํ™” ๋˜๋Š” ๊ฒฝ์ œ ์ƒํ™ฉ์˜ ์•…ํ™”์™€ ๊ด€๋ จ์ด ์žˆ์„ ๊ฒƒ์œผ๋กœ ์ถ”์ •๋ฉ๋‹ˆ๋‹ค

Physics
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The Curious Case of Lemaitres Equation No. 24

์ด ๋…ผ๋ฌธ์€ ์ฒœ์ฒด๋ฌผ๋ฆฌํ•™ ์—ญ์‚ฌ์ƒ ์ค‘์š”ํ•œ ๋ฐœ๊ฒฌ ์ค‘ ํ•˜๋‚˜์ธ ์šฐ์ฃผ์˜ ํŒฝ์ฐฝ์— ๋Œ€ํ•œ ์ดˆ๊ธฐ ์—ฐ๊ตฌ๋ฅผ ๋‹ค๋ฃน๋‹ˆ๋‹ค. ํŠนํžˆ, ์ด ๋…ผ๋ฌธ์€ ๋ ˆ๋งˆํŠธ์˜ 1927๋…„ ๋…ผ๋ฌธ๊ณผ ๊ทธ ํ›„์˜ ์˜์–ด ๋ฒˆ์—ญ๋ณธ ๊ฐ„์˜ ์ฐจ์ด์ ์„ ์ง‘์ค‘์ ์œผ๋กœ ๋ถ„์„ํ•ฉ๋‹ˆ๋‹ค. ๋ ˆ๋งˆํŠธ๋Š” ์„ฑ์ง์ž๋กœ์„œ ์šฐ์ฃผ์˜ ์ฐฝ์กฐ์— ๋Œ€ํ•œ ์ž์‹ ์˜ ํŽธํ–ฅ์„ ์ธ์ •ํ•˜๋ฉด์„œ, ์šฐ์ฃผ ํŒฝ์ฐฝ์˜ ๋ฐœ๊ฒฌ์€ ๊ทธ์—๊ฒŒ ํŠน๋ณ„ํ•œ ์˜๋ฏธ๋ฅผ ๊ฐ€์กŒ์Šต๋‹ˆ๋‹ค. ์ด ๋…ผ๋ฌธ์—์„œ ๋ ˆ๋งˆํŠธ๋Š” 42๊ฐœ์˜ ์€ํ•˜๋“ค์˜ ๊ฑฐ๋ฆฌ์™€ ๋ฐฉ์‚ฌ์†๋„ ๋ฐ์ดํ„ฐ๋ฅผ ๋ถ„์„ํ•˜์—ฌ ์šฐ์ฃผ์˜ ํŒฝ์ฐฝ์„ ์ตœ์ดˆ๋กœ ์ œ์‹œํ–ˆ์Šต๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜, ๋ ˆ๋งˆํŠธ์˜ ๋ฐœ๊ฒฌ์€ ์—๋“œ์œˆ ํ—ˆ๋ธ”์ด 1929๋…„์— ๋ฐœํ‘œํ•œ ์—ฐ๊ตฌ๋ณด๋‹ค ๋‘ ํ•ด ์•ž์„ฐ์Œ์—๋„ ๋ถˆ๊ตฌํ•˜๊ณ  ๋„๋ฆฌ ์•Œ๋ ค์ง€์ง€

Astrophysics Physics
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Harmonic analysis of spherical sampling in diffusion MRI

๋ณธ ๋…ผ๋ฌธ์€ ํ™•์‚ฐ MRI์—์„œ ๋‹ค์ค‘ ์…ธ ๊ตฌํ˜• ์ƒ˜ํ”Œ๋ง์˜ ํšจ์œจ์„ฑ์„ ์ด๋ก ์ ์œผ๋กœ ๋ถ„์„ํ•˜๊ณ , ์ด๋ฅผ ํ†ตํ•ด HYDI์™€ ์œ ์‚ฌํ•œ ์ ‘๊ทผ ๋ฐฉ์‹์— ๋Œ€ํ•œ ์ดํ•ด๋ฅผ ์ฆ์ง„์‹œํ‚ค๋ฉฐ ํ–ฅํ›„ ์ตœ์ ํ™” ์ „๋žต์„ ์ œ์‹œํ•˜๋Š” ๊ฒƒ์„ ๋ชฉํ‘œ๋กœ ํ•œ๋‹ค. ์—ฐ๊ตฌ๋Š” ํ™•์‚ฐ MRI์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š” ๋ฐฉํ–ฅ ๋ถ„ํฌ ํ•จ์ˆ˜(ODF)์˜ ๊ณ„์‚ฐ ๋ฐฉ๋ฒ•๊ณผ ๊ทธ ๊ณผ์ •์—์„œ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ๋Š” ๋ฌธ์ œ์ ๋“ค์„ ์ง‘์ค‘์ ์œผ๋กœ ๋‹ค๋ฃฌ๋‹ค. 1. ODF์™€ ๊ตฌ๋ฉด ์กฐํ™” ๋ณ€ํ™˜(SH) ODF๋Š” ํ™•์‚ฐ ์‹ ํ˜ธ๋ฅผ ๋ฐฉํ–ฅ๋ณ„๋กœ ๋ถ„์„ํ•˜์—ฌ ๋‡Œ ๋‚ด ๋ฏธ์„ธ๊ตฌ์กฐ์˜ ๋ฐฉํ–ฅ์„ฑ์„ ํŒŒ์•…ํ•˜๋Š” ๋ฐ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•œ๋‹ค. ์ด ๋…ผ๋ฌธ์—์„œ๋Š” ODF๋ฅผ ๊ณ„์‚ฐํ•˜๊ธฐ ์œ„ํ•ด ๊ตฌ๋ฉด ์กฐํ™” ๋ณ€ํ™˜(SH)์„ ์‚ฌ

Quantitative Biology Analysis Physics
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The Stochastic Universe: Professor A.M. Mathais 75th Birthday

A.M. ๋งˆํƒ€์ด ๊ต์ˆ˜๋Š” 1970๋…„๋Œ€๋ถ€ํ„ฐ ํ™•๋ฅ  ๋ฐ ํ†ต๊ณ„๋ฅผ ํ™œ์šฉํ•œ ๋ฌผ๋ฆฌํ•™ ์—ฐ๊ตฌ ํ”„๋กœ๊ทธ๋žจ์„ ์‹œ์ž‘ํ•˜์—ฌ, ์ •๋ณด ์ด๋ก ๊ณผ ์—”ํŠธ๋กœํ”ผ ํ•จ์ˆ˜, ์ •๊ทœ ๋ถ„ํฌ, ๊ทธ๋ฆฌ๊ณ  ์ผ๋ฐ˜ํ™”๋œ ํ•˜์ดํผ์ง€์ˆ˜ ํ•จ์ˆ˜ ๋“ฑ์„ ๋‹ค๋ฃฌ ์„ธ ๊ถŒ์˜ ๋‹จํ–‰๋ณธ์„ ์ถœํŒํ–ˆ์Šต๋‹ˆ๋‹ค. ๊ทธ์˜ ์—ฐ๊ตฌ๋Š” ์ˆ˜ํ•™๊ณผ ๋ฌผ๋ฆฌํ•™ ๊ฐ„์˜ ๊นŠ์€ ์—ฐ๊ด€์„ฑ์„ ๊ฐ•์กฐํ•˜๋ฉฐ, ํŠนํžˆ ํ†ต๊ณ„๋ฌผ๋ฆฌํ•™์—์„œ ์•„์ง ํ˜•์‹์  ๊ณต๋ฆฌ๊ณ„๊ฐ€ ๊ฐœ๋ฐœ๋˜์ง€ ๋ชปํ•œ ๋ถ€๋ถ„์— ์ฃผ๋ชฉํ•ฉ๋‹ˆ๋‹ค. ์ˆ˜ํ•™๊ณผ ๋ฌผ๋ฆฌํ•™์˜ ์ƒํ˜ธ์ž‘์šฉ์€ ์˜ค๋žœ ์—ญ์‚ฌ๋ฅผ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด, ์ผ๋ฐ˜ ์ƒ๋Œ€์„ฑ์ด๋ก ์€ ๋ฆฌ๋งŒ ๊ธฐํ•˜ํ•™์„ ๋ฐ”ํƒ•์œผ๋กœ ํ•˜๋ฉฐ, ์–‘์ž์—ญํ•™์€ ํ•จ์ˆ˜ ๋ถ„์„์— ํฌ๊ฒŒ ์˜์กดํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์•„์ธ์Šˆํƒ€์ธ์€ 1915๋…„์—

Physics
Echo-based measurement of the speed of sound

Echo-based measurement of the speed of sound

์ด ๋…ผ๋ฌธ์€ ๊ฐ„๋‹จํ•œ ์‹คํ—˜ ๋ฐฉ๋ฒ•์œผ๋กœ ์Œ์†์„ ์ธก์ •ํ•˜๋Š” ๊ณผ์ •๊ณผ ๊ทธ ๊ฒฐ๊ณผ๋ฅผ ์ƒ์„ธํžˆ ์„ค๋ช…ํ•˜๊ณ  ์žˆ๋‹ค. ์—ฐ๊ตฌ์˜ ํ•ต์‹ฌ์€ ํ’์„ ์ด ํ„ฐ์ง€๋Š” ์ˆœ๊ฐ„๋ถ€ํ„ฐ ์—์ฝ”๊ฐ€ ๋„์ฐฉํ•  ๋•Œ๊นŒ์ง€์˜ ์‹œ๊ฐ„ ์ฐจ์ด๋ฅผ ํ†ตํ•ด ์Œ์†์„ ๊ณ„์‚ฐํ•˜๋Š” ๊ฒƒ์ด๋‹ค. ์‹คํ—˜ ๋ฐฉ๋ฒ• ๋ฐ ์žฅ๋น„ ์‹คํ—˜์—์„œ๋Š” Audacity๋ผ๋Š” ์˜ค๋””์˜ค ํŽธ์ง‘ ์†Œํ”„ํŠธ์›จ์–ด๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ํ’์„ ์ด ํ„ฐ์ง€๋Š” ์ˆœ๊ฐ„๊ณผ ์—์ฝ”๊ฐ€ ๋„์ฐฉํ•œ ์‹œ์ ์„ ์ •ํ™•ํžˆ ์ธก์ •ํ•˜์˜€๋‹ค. ํ’์„ ์€ ํฐ ํ‰ํ‰ํ•œ ๋ฒฝ์—์„œ 45.72m ๋–จ์–ด์ง„ ๊ณณ์—์„œ ํ„ฐ์กŒ์œผ๋ฉฐ, ์‹คํ—˜ ํ™˜๊ฒฝ์˜ ์˜จ๋„๋Š” 18.3ยฐC, ์Šต๋„๋Š” 16.1%, ํ˜„์ง€ ๊ณ ๋„๋Š” 360m์˜€๋‹ค. ๊ฒฐ๊ณผ ๋ถ„์„ ์‹คํ—˜์—์„œ๋Š” ์„ธ ๊ฐœ์˜ ํ’์„ ์„ ์‚ฌ์šฉํ•˜์—ฌ ์ธก์ •์„

Physics
Reply to Comment on `Formation of bound states of electrons in   spherically symmetric oscillations of plasma

Reply to Comment on `Formation of bound states of electrons in spherically symmetric oscillations of plasma

: ์ด ๋…ผ๋ฌธ์€ ํ”Œ๋ผ์ฆˆ๋งˆ ๋ฌผ๋ฆฌํ•™์—์„œ ์ค‘์š”ํ•œ ๋ฌธ์ œ์ธ ์•ˆ์ •์ ์ธ ์ž์—ฐ ํ”Œ๋ผ์ฆˆ๋งˆ ๊ตฌ์กฐ์˜ ์ด๋ก ์  ๋ชจ๋ธ ๋ถ€์กฑ์„ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•œ ์ƒˆ๋กœ์šด ์ ‘๊ทผ ๋ฐฉ์‹์„ ์ œ์‹œํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํŠนํžˆ, ํ”Œ๋ผ์ฆˆ๋ชจ์ด๋“œ๋ผ๋Š” ๊ตฌ์กฐ์—์„œ ์ „์ž ๊ธฐ์ฒด์˜ ๋ฐฉ์‚ฌํ˜• ์ง„๋™์— ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ์œผ๋ฉฐ, ์ด๋Ÿฌํ•œ ํ˜„์ƒ์€ ์–‘์ž ๋ฐ ๊ณ ์ „ ํ”„๋ ˆ์ž„์›Œํฌ ๋ชจ๋‘์—์„œ ๋‹ค๋ฃจ์–ด์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์˜ ํ•ต์‹ฌ ๋‚ด์šฉ ์ค‘ ํ•˜๋‚˜๋Š” ์ด์˜จ ์ŒํŒŒ ๊ตํ™˜์„ ํ†ตํ•ด ์ „์ž์˜ ๊ฒฐํ•ฉ ์ƒํƒœ ํ˜•์„ฑ ๊ฐ€๋Šฅ์„ฑ์„ ๋ถ„์„ํ•œ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ์ €์ž๋Š” ์ด๋ฅผ ๊ณ ์ „ ์ „์ž๊ธฐํ•™์˜ ํ”„๋ ˆ์ž„์›Œํฌ์—์„œ ๋‹ค๋ฃจ์—ˆ์œผ๋ฉฐ, ์ด๋Ÿฌํ•œ ์ ‘๊ทผ ๋ฐฉ์‹์€ ํ”Œ๋ผ์ฆˆ๋งˆ ๋ฌผ๋ฆฌํ•™์—์„œ ์ค‘์š”ํ•œ ํ˜„์ƒ์„ ์ดํ•ดํ•˜๋Š” ๋ฐ ๋„์›€์ด ๋ 

Physics
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Toward Large-Scale Photonics-Empowered AI Systems: From Physical Design Automation to System-Algorithm Co-Exploration

์ด ๋…ผ๋ฌธ์€ ํฌํ† ๋‹‰์Šค ๊ธฐ๋ฐ˜ ์ธ๊ณต์ง€๋Šฅ ๊ฐ€์†๊ธฐ์˜ ์—ฐ๊ตฌ๊ฐ€ โ€œ๋””๋ฐ”์ด์Šคโ€‘๋ ˆ๋ฒจ ํ˜์‹ โ€์—์„œ โ€œ์‹œ์Šคํ…œโ€‘๋ ˆ๋ฒจ ์‹ค์šฉํ™”โ€ ๋‹จ๊ณ„๋กœ ์ „ํ™˜๋˜๋Š” ๋ฐ ํ•„์š”ํ•œ ํ•ต์‹ฌ ๊ณผ์ œ๋ฅผ ์ฒด๊ณ„์ ์œผ๋กœ ์ •๋ฆฌํ•˜๊ณ , ์ด๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•œ ํ†ตํ•ฉ ์„ค๊ณ„ ํ๋ฆ„์„ ์ œ์‹œํ•œ๋‹ค๋Š” ์ ์—์„œ ์˜๋ฏธ๊ฐ€ ํฌ๋‹ค. ์ฒซ ๋ฒˆ์งธ ๊ณ ๋ ค์‚ฌํ•ญ์ธ ๋™์  ํ…์„œ ์—ฐ์‚ฐ ์ง€์›์€ ํ˜„์žฌ AI ๋ชจ๋ธ์ด ๊ณ ์ •๋œ ๊ฐ€์ค‘์น˜ ๋งคํŠธ๋ฆญ์Šค๋งŒ์„ ํ™œ์šฉํ•˜๋Š” ์ „ํ†ต์ ์ธ ์ปจ๋ณผ๋ฃจ์…˜ ๊ฐ€์†๊ธฐ์™€๋Š” ๊ทผ๋ณธ์ ์œผ๋กœ ๋‹ค๋ฅธ ์š”๊ตฌ์‚ฌํ•ญ์ด๋‹ค. ํŠนํžˆ Transformer์™€ ๊ฐ™์€ ์–ดํ…์…˜ ๋ฉ”์ปค๋‹ˆ์ฆ˜์€ ์ž…๋ ฅ ์‹œํ€€์Šค ๊ธธ์ด์— ๋”ฐ๋ผ ์‹ค์‹œ๊ฐ„์œผ๋กœ ๊ฐ€์ค‘์น˜ ํ–‰๋ ฌ์„ ์žฌ๊ตฌ์„ฑํ•˜๊ณ , ๋‹ค์ค‘ ํ—ค๋“œ ์—ฐ์‚ฐ์„ ๋ณ‘๋ ฌ์ ์œผ๋กœ ์ˆ˜ํ–‰ํ•œ๋‹ค

System Physics
Floating Extensional Flows

Floating Extensional Flows

๋ณธ ๋…ผ๋ฌธ์€ ๋น™ํ•˜ ์‹œํŠธ์˜ ํ™•์žฅ ํ๋ฆ„์— ๋Œ€ํ•œ ์‹ฌ๋„ ์žˆ๋Š” ๋ชจ๋ธ๋ง๊ณผ ๋ถ„์„์„ ํ†ตํ•ด, ๋‰ดํ„ด ์œ ์ฒด์™€ ๋น„๋‰ดํ„ด ์œ ์ฒด ์‚ฌ์ด์˜ ์ค‘์š”ํ•œ ์—ญํ•™์  ์ฐจ์ด๋ฅผ ํƒ๊ตฌํ•œ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ํŠนํžˆ ๋น™ํ•˜๊ฐ€ ๋ฐ”๋‹ค ์œ„๋กœ ๋– ์˜ค๋ฅด๋ฉด์„œ ๋ฐœ์ƒํ•˜๋Š” ํ™•์žฅ ํ๋ฆ„์— ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ๋‹ค. 1. ๋น™ํ•˜ ์‹œํŠธ์˜ ๊ธฐ๋ณธ ํŠน์„ฑ ์ „๋‹จ ํ๋ฆ„ : ๋น™ํ•˜์˜ ์ค‘์‹ฌ๋ถ€๋Š” ์ง€๋ฐ˜์— ๊ณ ์ •๋˜์–ด ์žˆ์œผ๋ฉฐ, ์ฃผ๋œ ํ๋ฆ„์€ ์ „๋‹จ ํ๋ฆ„์ด๋‹ค. ํ™•์žฅ ํ๋ฆ„ : ์ค‘๋ ฅ์— ์˜ํ•ด ๋ณ€ํ˜•๋˜๋Š” ๋น™ํ•˜๋Š” ๋‘๊ป˜๊ฐ€ ์ถฉ๋ถ„ํžˆ ์–‡์•„์ง€๋ฉด ๋ฐ”๋‹ค ์œ„๋ฅผ ๋– ๋‹ค๋‹ ์ˆ˜ ์žˆ๋‹ค. ์ด๋•Œ์˜ ํ๋ฆ„์„ ํ™•์žฅ ํ๋ฆ„์ด๋ผ ๋ถ€๋ฅธ๋‹ค. 2. ๋‰ดํ„ด ์œ ์ฒด์™€ ๋น„๋‰ดํ„ด ์œ ์ฒด์˜ ๋น„๊ต ๋‰ดํ„ด ์œ ์ฒด : ์ ์„ฑ์ด ์ผ์ •ํ•œ

Physics
Cicada: a Heavy but Agile Flyer

Cicada: a Heavy but Agile Flyer

์ด ๋…ผ๋ฌธ์€ ๋งค๋ฏธ์˜ ๋น„ํ–‰ ๋ฉ”์ปค๋‹ˆ์ฆ˜์— ๋Œ€ํ•œ ๊นŠ์ด ์žˆ๋Š” ๋ถ„์„์„ ์ œ๊ณตํ•˜๋ฉฐ, ํŠนํžˆ ๊ทธ๋“ค์˜ ๋ฌด๊ฑฐ์šด ์ฒด์ค‘์—๋„ ๋ถˆ๊ตฌํ•˜๊ณ  ๋†’์€ ์–‘๋ ฅ์„ ๋ฐœ์ƒ์‹œํ‚ค๋Š” ๋Šฅ๋ ฅ์— ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ๋Š” ๊ณค์ถฉ ๋น„ํ–‰์˜ ๋ณต์žก์„ฑ์„ ์ดํ•ดํ•˜๋Š” ๋ฐ ์ค‘์š”ํ•œ ๋‹จ๊ณ„๋ฅผ ์ œ๊ณตํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์ด๋Ÿฌํ•œ ์ง€์‹์€ ๋งˆ์ดํฌ๋กœ ์—์–ด ๋น„ํžˆํด(MAV) ์„ค๊ณ„์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. 1. ๋งค๋ฏธ์˜ ํŠน์„ฑ ๋ถ„์„ ๋งค๋ฏธ๋Š” ๋‹ค๋ฅธ ๊ณค์ถฉ๋“ค์— ๋น„ํ•ด ์ƒ๋Œ€์ ์œผ๋กœ ๋ฌด๊ฑฐ์šด ์ฒด์ค‘์„ ๊ฐ€์ง€๊ณ  ์žˆ์ง€๋งŒ, ๋†’์€ ์–‘๋ ฅ์„ ๋ฐœ์ƒ์‹œ์ผœ ๋‚  ์ˆ˜ ์žˆ๋Š” ๋Šฅ๋ ฅ์ด ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ์—ฐ๊ตฌ์—์„œ๋Š” ์ด๋Ÿฌํ•œ ๋ฉ”์ปค๋‹ˆ์ฆ˜์„ ์ดํ•ดํ•˜๊ธฐ ์œ„ํ•ด ๊ณ ์† ํฌ๊ทธ๋ผ๋ฉ”ํŠธ๋ฆฌ ์‹œ์Šคํ…œ

Physics
No Image

Markov-Binary Visibility Graph: a new method for analyzing Complex Systems

์ฃ„์†กํ•ฉ๋‹ˆ๋‹ค, ํ•˜์ง€๋งŒ ์ œ๊ณต๋œ ํ…์ŠคํŠธ ์กฐ๊ฐ์—๋Š” ์‹ค์ œ ๋‚ด์šฉ์ด ํฌํ•จ๋˜์–ด ์žˆ์ง€ ์•Š์•„์„œ ๋…ผ๋ฌธ์˜ ์ดˆ๋ก์ด๋‚˜ ์‹ฌ๋„ ๋ถ„์„์„ ์ˆ˜ํ–‰ํ•  ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์˜ ๋ณธ๋ฌธ ๋˜๋Š” ์ค‘์š”ํ•œ ๋ถ€๋ถ„์„ ํฌํ•จํ•˜๋Š” ์ถ”๊ฐ€ ์ •๋ณด๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค. ๋งŒ์•ฝ ๋…ผ๋ฌธ์˜ ํŠน์ • ์„น์…˜์ด๋‚˜ ์š”์•ฝ, ๊ทธ๋ž˜ํ”„, ํ‘œ ๋“ฑ์„ ์ œ๊ณตํ•ด ์ฃผ์‹ค ๊ฒฝ์šฐ, ๊ทธ์— ๋”ฐ๋ฅธ ๋ถ„์„๊ณผ ๋ฒˆ์—ญ์„ ๋„์™€๋“œ๋ฆด ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

Physics Nonlinear Sciences System
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The Degree Sequence of Random Apollonian Networks

๋ณธ ๋…ผ๋ฌธ์€ ๋žœ๋ค ์•„ํด๋กœ๋‹ˆ ๋„คํŠธ์›Œํฌ(RANs)์˜ ์ •๋„ ๋ถ„ํฌ์— ๋Œ€ํ•œ ๊นŠ์ด ์žˆ๋Š” ๋ถ„์„์„ ์ œ๊ณตํ•˜๋ฉฐ, ์ด๋Š” ๊ทธ๋ž˜ํ”„ ์ด๋ก ์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š” ๋ชจ๋ธ ์ค‘ ํ•˜๋‚˜์ด๋‹ค. RANs๋Š” ํ‰๋ฉด ๊ทธ๋ž˜ํ”„๋กœ์„œ, ๊ฐ ๋‹จ๊ณ„์—์„œ ๋ฌด์ž‘์œ„๋กœ ์‚ผ๊ฐํ˜•์„ ์„ ํƒํ•˜๊ณ  ๊ทธ ๋‚ด๋ถ€์— ์ƒˆ๋กœ์šด ์ •์ ์„ ์ถ”๊ฐ€ํ•˜์—ฌ ๋„คํŠธ์›Œํฌ๋ฅผ ํ™•์žฅํ•œ๋‹ค. 1. ์„œ๋ก  ์„œ๋ก ์—์„œ๋Š” ๋ณธ ๋…ผ๋ฌธ์˜ ์ฃผ์š” ๋ชฉํ‘œ์™€ ์—ฐ๊ตฌ ๋ฐฐ๊ฒฝ์ด ์„ค๋ช…๋œ๋‹ค. RANs๋Š”

Physics Network Mathematics Social Networks Computer Science
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The cradle of pyramids in satellite images

๋ณธ ๋…ผ๋ฌธ์€ ์œ„์„ฑ ์ด๋ฏธ์ง€์™€ ์›๊ฒฉ ๊ฐ์ง€ ๊ธฐ๋ฒ•์ด ์–ด๋–ป๊ฒŒ ์ด์ง‘ํŠธ ๊ณ ๋Œ€ ์œ ์  ๋ฐœ๊ตด์— ํ™œ์šฉ๋  ์ˆ˜ ์žˆ๋Š”์ง€๋ฅผ ํƒ๊ตฌํ•˜๊ณ  ์žˆ๋‹ค. ์ €์ž๋Š” ๊ตฌ๊ธ€ ๋งต์Šค์˜ ์ด๋ฏธ์ง€ ์ฒ˜๋ฆฌ ๊ธฐ๋Šฅ๊ณผ SIR C/X SAR ๋ ˆ์ด๋” ์‹œ์Šคํ…œ์„ ๋น„๊ต ๋ถ„์„ํ•จ์œผ๋กœ์จ, ์›๊ฒฉ ๊ฐ์ง€ ๊ธฐ๋ฒ•์˜ ํšจ๊ณผ์„ฑ์„ ์ž…์ฆํ•˜๋ ค๊ณ  ๋…ธ๋ ฅํ•œ๋‹ค. 1. ์›๊ฒฉ ๊ฐ์ง€ ๊ธฐ๋ฒ•์˜ ์ค‘์š”์„ฑ ๋…ผ๋ฌธ์€ ๊ณ ๊ณ ํ•™์—์„œ ์›๊ฒฉ ๊ฐ์ง€ ๊ธฐ๋ฒ•์ด ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•œ๋‹ค๋Š” ์ ์„ ๊ฐ•์กฐํ•˜๊ณ  ์žˆ๋‹ค. ํŠนํžˆ, SIR C/X SAR ๋ ˆ์ด๋” ์‹œ์Šคํ…œ๊ณผ ๊ตฌ๊ธ€ ๋งต์Šค์˜ ์ด๋ฏธ์ง€๋ฅผ ๋น„๊ต ๋ถ„์„ํ•จ์œผ๋กœ์จ, ์ด๋Ÿฌํ•œ ๊ธฐ์ˆ ๋“ค์ด ์ด์ง‘ํŠธ ๊ณ ๋Œ€ ์œ ์  ๋ฐœ๊ตด์— ์–ด๋–ป๊ฒŒ ํ™œ์šฉ๋  ์ˆ˜ ์žˆ๋Š”์ง€ ์„ค๋ช…ํ•œ๋‹ค. 2. ๊ตฌ๊ธ€

Physics
Weighted Radial Variation for Node Feature Classification

Weighted Radial Variation for Node Feature Classification

๋ณธ ๋…ผ๋ฌธ์€ ๋ณต์žกํ•œ ๋„คํŠธ์›Œํฌ์—์„œ ๋…ธ๋“œ ํŠน์„ฑ ๋ถ„๋ฅ˜์˜ ์ƒˆ๋กœ์šด ์ ‘๊ทผ๋ฒ•์ธ ๊ฐ€์ค‘ ๋ฐฉ์‚ฌ ๋ณ€์ด(WRV) ๊ธฐ๋ฒ•์„ ์ œ์•ˆํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. WRV๋Š” ๊ฐ ๋…ธ๋“œ์— ๋Œ€ํ•œ ๋ฒกํ„ฐ ํ๋ฆ„ ๊ตฌ์„ฑ์— ๊ธฐ๋ฐ˜ํ•˜์—ฌ, ์นด๋ฅด๋””๋‚˜๋ฆฌํ‹ฐ(๋…ธ๋“œ ๊ฐ„ ์—ฐ๊ฒฐ ์ˆ˜), ๋ฐฉํ–ฅ, ๊ธธ์ด, ๊ทธ๋ฆฌ๊ณ  ํ๋ฆ„ ํฌ๊ธฐ์˜ ์ธก๋ฉด์—์„œ ๋™๊ธฐํ™”๋œ ๊ฐ ์—”ํ‹ฐํ‹ฐ์˜ ๋ฒกํ„ฐ๋ฅผ ์‚ฌ์šฉํ•ฉ๋‹ˆ๋‹ค. ์ด๋Š” ๋ณต์žกํ•œ ๋„คํŠธ์›Œํฌ ๋ถ„์„์—์„œ ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•˜๋Š”๋ฐ, ํŠนํžˆ ๋น„์ธ์ ‘ ๊ณต๊ฐ„์— ์—ฐ๊ฒฐ๋˜๋Š” ์ธ๊ฐ„๊ณผ ์ •๋ณด ํ๋ฆ„์˜ ๋ณต์žกํ•œ ์—ญํ•™์„ ์ดํ•ดํ•˜๋Š” ๋ฐ ์œ ์šฉํ•ฉ๋‹ˆ๋‹ค. WRV ๊ณผ์ •์€ ๋ณ„ ๋ชจ์–‘ ์—”ํ‹ฐํ‹ฐ์˜ ๊ฐœ๋ณ„ ํ๋ฆ„ ๋ฒกํ„ฐ๋ฅผ 0 360ยฐ ์ŠคํŽ™ํŠธ๋Ÿผ์— ํŽผ์ณ ๋…ํŠนํ•œ ์‹ ํ˜ธ๋ฅผ ํ˜•์„ฑํ•˜๋ฉฐ, ์ด

Computer Science Computer Vision Physics

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