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Lunar Eclipse of June, 15, 2011: Three-color umbra surface photometry

์ด ๋…ผ๋ฌธ์€ 2011๋…„ 6์›” 15์ผ์— ๋ฐœ์ƒํ•œ ์ด ๋‹ฌ ์‹์„ ๊ด€์ธกํ•˜์—ฌ ์ง€๊ตฌ ๋Œ€๊ธฐ์˜ ๊ด‘ํ•™์  ์„ฑ๋ถ„๊ณผ ๊ทธ ๋ณ€ํ™”๋ฅผ ๋ถ„์„ํ•˜๋Š” ๋ฐ ์ดˆ์ ์„ ๋งž์ถ”๊ณ  ์žˆ๋‹ค. ๋‹ฌ ์‹์€ ํƒœ์–‘์—์„œ ๋ฐœ์‚ฐ๋œ ๋ฐฉ์‚ฌ์„ ์ด ์ง€๊ตฌ ๋Œ€๊ธฐ๋ฅผ ํ†ต๊ณผํ•˜๋ฉด์„œ ๊ตด์ ˆ, ์‚ฐ๋ž€ ๋ฐ ํก์ˆ˜๋˜๋Š” ๊ณผ์ •์„ ๊ด€์ฐฐํ•  ์ˆ˜ ์žˆ๋Š” ์ค‘์š”ํ•œ ๊ธฐํšŒ๋กœ, ์ด๋Š” ๋Œ€๊ธฐ ์กฐ๊ฑด์— ํฌ๊ฒŒ ์˜์กดํ•œ๋‹ค. ๋…ผ๋ฌธ์˜ ํ•ต์‹ฌ ๋‚ด์šฉ์€ ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค: 1. ๋‹ฌ ์‹์˜ ๊ด‘๋„ ์ธก์ • : ๋‹ฌ ํ‘œ๋ฉด์˜ ๊ด‘๋„๋ฅผ ์ธก์ •ํ•จ์œผ๋กœ์จ ์ง€๊ตฌ ๋Œ€๊ธฐ์˜ ๋‹ค์–‘ํ•œ ๊ณ ๋„์™€ ๊ฒฝ๊ณ„์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๊ตด์ ˆ์„ ํฌ๊ด„ํ•œ๋‹ค. ํŠนํžˆ, 2011๋…„ 6์›” 15์ผ์˜ ์ด ๋‹ฌ ์‹์€ ์ ๋„ ๋ฐ ์—ด๋Œ€ ์ง€์—ญ์˜ ๋Œ€๊ธฐ๋ฅผ ๊ด€์ฐฐํ•  ์ˆ˜ ์žˆ๋Š”

Physics Astrophysics
Brief comment: Dicke Superradiance and Superfluorescence Find Application for Remote Sensing in Air

Brief comment: Dicke Superradiance and Superfluorescence Find Application for Remote Sensing in Air

๋ณธ ๋…ผ๋ฌธ์€ ๋”•์ผ€ ์ดˆ๊ณผ๋ฐฉ์‚ฌ(SR)์™€ ์ดˆ๊ณผ๋ฐœ๊ด‘(SF), ๊ทธ๋ฆฌ๊ณ  ์ฆ๊ฐ• ๋ฌด์ž‘์œ„ ๋ฐฉ์ถœ(ASE)์˜ ์ฐจ์ด์ ์— ๋Œ€ํ•ด ์„ค๋ช…ํ•˜๊ณ , ์ด๋“ค ํ˜„์ƒ์ด ๊ณต๊ธฐ ์ค‘ ์›๊ฒฉ ๊ฐ์ง€ ๊ธฐ์ˆ ์— ์–ด๋–ป๊ฒŒ ํ™œ์šฉ๋  ์ˆ˜ ์žˆ๋Š”์ง€๋ฅผ ๋ถ„์„ํ•ฉ๋‹ˆ๋‹ค. ๋…ผ๋ฌธ์€ ์ด๋Ÿฌํ•œ ํ˜„์ƒ์„ ์‹๋ณ„ํ•˜๋Š” ๋ฐฉ๋ฒ•์„ ์ œ์‹œํ•˜๋ฉฐ, ํŠนํžˆ Dogariu ์™ธ ์—ฐ๊ตฌ์ง„์˜ ๊ด€์ฐฐ ๊ฒฐ๊ณผ๋ฅผ ํ†ตํ•ด SR๊ณผ SF๊ฐ€ ์‹ค์ œ ์‹คํ—˜์—์„œ ์–ด๋–ป๊ฒŒ ๊ตฌ๋ถ„๋˜๋Š”์ง€ ์„ค๋ช…ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. 1. ๋”•์ผ€ ์ดˆ๊ณผ๋ฐฉ์‚ฌ(SR)์™€ ์ดˆ๊ณผ๋ฐœ๊ด‘(SF) ๋”•์ผ€๋Š” 1954๋…„์— ๊ฐ€์Šค ์ƒํƒœ์˜ ์›์ž ๋˜๋Š” ๋ถ„์ž์˜ ๋ฐ€์ง‘๋œ ํฅ๋ถ„ 2๋‹จ๊ณ„ ์‹œ์Šคํ…œ์—์„œ ๋ ˆ์ด์ € ๊ณต๋ช… ์—†์ด ํ˜‘๋™ ๋ฐฉ์ถœ์„ ์˜ˆ์ธกํ–ˆ์Šต๋‹ˆ๋‹ค. ์ดํ›„ ๋ณด๋‹ˆํ”ผ

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
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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
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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