28 research outputs found

    혐기-λ¬΄μ‚°μ†Œ-호기 곡정을 μ΄μš©ν•œ ν•˜μˆ˜μ˜ μ§ˆμ†ŒΒ·μΈ μ œκ±°μ— κ΄€ν•œ 연ꡬ

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    ν•™μœ„λ…Όλ¬Έ(석사)--μ„œμšΈλŒ€ν•™κ΅ λ³΄κ±΄λŒ€ν•™μ› :ν™˜κ²½λ³΄κ±΄ν•™κ³Ό ν™˜κ²½λ³΄κ±΄μ „κ³΅,2000.Maste

    Localization of Mono Microphone with Stereo Loudspeaker Using Hidden Time Synchronization Signal in Audio

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    ν•™μœ„λ…Όλ¬Έ (석사)-- μ„œμšΈλŒ€ν•™κ΅ λŒ€ν•™μ› : 전기·컴퓨터곡학뢀, 2012. 2. 성ꡉλͺ¨.항법μž₯치(Navigation System)은 μ—¬λŸ¬ 가지 μš©λ„μ™€ κ·Έ μš©λ„μ— λ§žλŠ” μ μ ˆν•œ λ°©λ²•μœΌλ‘œ κ΅¬ν˜„λ˜μ–΄ μ™”λ‹€. κ°€μž₯ λŒ€ν‘œμ μΈ 항법 μž₯치인 GPS 와 λΉ„μŠ·ν•œ λ°©λ²•μœΌλ‘œ, GPS μ‹ ν˜Έκ°€ λ„λ‹¬ν•˜μ§€ μ•ŠλŠ” μ‹€λ‚΄μ—μ„œλ„ μ‚¬μš©ν•  수 μžˆλŠ” λ§Žμ€ μœ„μΉ˜ν™•μΈ μ‹œμŠ€ν…œλ“€μ΄ κ°œλ°œλ˜μ–΄ μ™”λ‹€. μ΄λŸ¬ν•œ μ‹€λ‚΄μ˜ μ •λ°€ν•œ μœ„μΉ˜ν™•μΈ μ‹œμŠ€ν…œμ€ μ μ™Έμ„ μ΄λ‚˜ μ „μžκΈ°νŒŒλ₯Ό μ‚¬μš©ν•˜κ±°λ‚˜ ν˜Ήμ€ 초음파λ₯Ό μ‚¬μš©ν•˜μ—¬ μ‹€λ‚΄μ—μ„œ μ†Œν˜• λ‘œλ΄‡μ˜ μœ„μΉ˜λ₯Ό νŒŒμ•…ν•˜κ±°λ‚˜ 거리λ₯Ό κ³„μΈ‘ν•˜λŠ” μž‘μ—…μ— 주둜 μ‚¬μš©λ˜μ–΄ μ™”λ‹€. κ·ΈλŸ¬λ‚˜ μ΄λŸ¬ν•œ 기쑴의 방법듀은, μ„±λŠ₯μ΄λ‚˜ μ •ν™•λ„μ˜ 문제λ₯Ό λ– λ‚˜ μ „μžκΈ°νŒŒ ν˜Ήμ€ 초음파 μ‹ ν˜Έλ₯Ό μƒμ„±ν•˜λŠ” Beacon 을 μ§€μ •λœ μœ„μΉ˜μ— μ„€μΉ˜ν•΄ μ£Όμ–΄μ•Ό ν•œλ‹€λŠ” μ μ—μ„œ μ œμ•½μ΄ μžˆμ—ˆλ‹€. κ·ΈλŸ¬λ‚˜ λ³Έ λ…Όλ¬Έμ—μ„œ μ œμ•ˆν•˜λŠ” 방법은, 기쑴에 κ°€μ •μ΄λ‚˜ 사무싀, 식당, μ „μ‹œνšŒμž₯ 등에 ν”νžˆ μ„€μΉ˜λ˜μ–΄μžˆλŠ” λΌμš°λ“œ μŠ€ν”Όμ»€λ₯Ό μ΄μš©ν•΄ μž¬μƒλ˜λŠ” μŒμ•… 속에 μ‹œκ°„λ™κΈ°ν™” μ‹ ν˜Έ(Time Synchronization Waveform)λ₯Ό 16kHz μ΄μƒμ˜ λŒ€μ—­μ— 은닉 ν•˜μ—¬, λͺ¨λ…Έ(Mono) 마이크둜폰 ν•˜λ‚˜λ‘œλ„ 좔가적인 μž₯치의 μ„€μΉ˜ 없이 μŒμ•…μ‹ ν˜Έκ°€ μŠ€ν”Όμ»€λ₯Ό 톡해 μž¬μƒ 되고 μžˆλŠ” μƒν™©μ—μ„œ μœ„μΉ˜ν™•μΈμ„ ν•  수 μžˆλŠ” μ‹œμŠ€ν…œμ„ κ΅¬ν˜„ν•˜κ³  μžˆλ‹€. μ΄λŸ¬ν•œ μ œμ•ˆλœ 방법은 좔가적인 Beacon 의 μ„€μΉ˜ 없이 μ €λ ΄ν•œ λΉ„μš©κ³Ό 곡간적 μ œμ•½ 없이 μœ„μΉ˜ν™•μΈ μ‹œμŠ€ν…œμ„ ꡬ좕이 ν•„μš”ν•œ μ—¬λŸ¬ μ‘μš©λΆ„μ•Όμ— 적용될 수 μžˆλ‹€.We here propose a method for localizing mono channel microphones using loudspeakers, with hidden time synchronization waveforms in the audio signal. There are cases where obtaining the location of devices such as gamepads or remote controllers are necessary, in the context of playing video games or tuning home theater systems to optimum conditions. However, due to the high costs of localization sensor devices and the volume of such equipment, manufacturers are reluctant to install localization sensor devices into TVs or loudspeakers in home theater systems. Therefore, we propose using a loudspeaker and a single microphone as communication equipment for the localization of a device. Our proposed system successfully found the location of a device without using any communication devices except a microphone. Also, by modifying Magnitude of the signal in frequency domain, we successfully hid the waveforms used for time synchronization. Thus, users remain unaware of the hidden time synchronization signal while the microphone is detecting the time synchronization waveform. With this hidden signal, we successfully obtained the location of the microphone while playing music with loudspeakers. We anticipate various interesting applications of our proposed technique.Maste

    μžμ•„ 동일성 연ꡬ

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    ν•™μœ„λ…Όλ¬Έ(석사)--μ„œμšΈλŒ€ν•™κ΅ λŒ€ν•™μ› :μ² ν•™κ³Ό μ„œμ–‘μ² ν•™μ „κ³΅,2000.Maste

    Two NP-complete Graph Problems

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    Maste

    Performance Prediction of Multi-stage Axial Compressors

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    Maste

    Measurement of Pork Freshness from Near Infrared Spectra Analysis

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    ν•™μœ„λ…Όλ¬Έ(석사)--μ„œμšΈλŒ€ν•™κ΅ λŒ€ν•™μ› :λ°”μ΄μ˜€μ‹œμŠ€ν…œΒ·μ†Œμž¬ν•™λΆ€(λ°”μ΄μ˜€μ‹œμŠ€ν…œκ³΅ν•™),2007.ν•™μœ„λ…Όλ¬Έ(석사) -

    μ–Όκ΅΄ 초기 νŒ¨ν„°λ‹μ—μ„œ retinoic acid 에 μ˜ν•œ 세포 이동과 μ¦μ‹μ˜ 쑰절

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    Dept. of Medical Science/석사[ν•œκΈ€]μ–Όκ΅΄ 돌기의 ν˜•μ„±κ³Ό νŒ¨ν„°λ‹ 및 골격 ν˜•μ„± κ³Όμ •μ—λŠ” μˆ˜λ§Žμ€ μ‹ ν˜ΈλΆ„μž, μ „μ‚¬μΈμž, 그리고 μ„±μž₯μΈμžλ“€μ΄ κ΄€μ—¬ν•œλ‹€. Retinoic acid (RA)λŠ” 비타민 A의 ν™œμ„± λŒ€μ‚¬ λ¬Όμ§ˆλ‘œμ„œ, λ‹€μ–‘ν•œ λ°°μ•„ λ°œμƒ 과정에 μž‘μš©ν•˜λŠ” μ€‘μš”ν•œ μ‹ ν˜ΈλΆ„μžμ΄λ‹€. κ·ΈλŸ¬λ‚˜ μ–Όκ΅΄ 초기 νŒ¨ν„°λ‹ κ³Όμ •μ—μ„œ 정상 λ†λ„μ˜ RAκ°€ λ‹΄λ‹Ήν•˜λŠ” 역할은 λͺ…ν™•ν•˜μ§€ μ•Šλ‹€. λ”°λΌμ„œ λ³Έ μ—°κ΅¬μ—μ„œλŠ” μ €λ†λ„μ˜ RAκ°€ 상악골과 ν•˜μ•…κ³¨μ˜ λ°œμƒμ—μ„œ 초기 νŒ¨ν„°λ‹ μ‘°μ ˆμ— κ΄€μ—¬ν•˜λŠ”μ§€ μ•Œμ•„λ³΄κ³ μž ν•˜μ˜€λ‹€.Hamberger-Hamilton stage 15 λ‹­ 배자의 제1인두ꢁ에 νˆ¬μ—¬λœ μ €λ†λ„μ˜ RA에 μ˜ν•΄ ν•˜μ•…κ³¨ κΈΈμ΄λŠ” κ°μ†Œλ˜μ—ˆκ³  특히 근심뢀 λ‘κ»˜κ°€ κ°μ†Œλ˜μ—ˆλ‹€. 그리고 상악골 κ·Όμ‹¬λΆ€μ—μ„œ λΌˆμ™€ μ—°κ³¨μ˜ κΈ°ν˜•, λ³€μœ„, 그리고 뢀뢄적인 μ†Œμ‹€μ΄ λ°œμƒν•˜μ˜€λ‹€.μ–Όκ΅΄λŒκΈ° 근심뢀 세포듀은 상악 근심뢀, μƒμ•…λŒκΈ°, ν•˜μ•…λŒκΈ°μ™€ maxillomandibular cleft λΆ€μœ„λ‘œ μ’€ 더 μ΄λ™ν•˜μ˜€μ§€λ§Œ RAκ°€ νˆ¬μ—¬λœ ν•˜μ•…λŒκΈ°λ‘œμ˜ 세포 이동은 μ œν•œλ˜μ—ˆλ‹€. 그리고 maxillomandibular cleft λΆ€μœ„λΏλ§Œ μ•„λ‹ˆλΌ μƒμ•…λŒκΈ°μ™€ ν•˜μ•…λŒκΈ°μ˜ κ·Όμ‹¬λΆ€μ—μ„œ 세포 μ¦μ‹μ˜ 증가가 κ΄€μ°°λ˜μ—ˆλ‹€.그리고 RA μ‹ ν˜Έκ³„, νŒ¨ν„°λ‹, 세포 이동 및 증식과 κ΄€λ ¨λœ λͺ‡λͺ‡ μœ μ „μž 및 λ‹¨λ°±μ§ˆμ˜ λ°œν˜„ νŒ¨ν„΄ λ³€ν™”κ°€ κ΄€μ°°λ˜μ—ˆλ‹€. λŒ€ν‘œμ μœΌλ‘œ RarΞ², AP-2와 actin capping protein의 λ°œν˜„μ΄ μ¦κ°€λ˜μ—ˆκ³  Barx1, Dlx5와 tubulin Ξ± chain의 λ°œν˜„μ€ κ°μ†Œλ˜μ—ˆλ‹€.결둠적으둜 RAλŠ” 세포 이동과 증식을 μ‘°μ ˆν•˜κ³  골격계 ν˜•νƒœ λ°œλ‹¬μ— μ°Έμ—¬ν•˜μ—¬ μ–Όκ΅΄ 초기 νŒ¨ν„°λ‹ 과정을 μ‘°μ ˆν•œλ‹€. [영문]Many signaling molecules, transcription factors, and growth factors are involved in the formation and patterning of facial prominences as well as of facial structures. Retinoic acid (RA), the active metabolites of vitamin A, is one of essential molecules for the embryogenesis. But it has not been elucidated for its roles in the early facial patterning especially at the endogenous level of concentration. So I wanted to address whether the low concentration of exogenous RA could control the early patterning in maxillaryand mandibular development.Low concentration of exogenous RA in the first pharyngeal arch at H-H stage 15 of chicken embryos caused the shortened and proximally thinned skeletal mandible. And it accompanied the deformation, derangement, and partial loss of bones and cartilages in the proximal part of maxillary regions.The DiI labeled cells showed more proximal cells migrated into the proximal maxilla, maxillary prominence, and maxillomandibular cleft, while being restricted to mandibular prominence. And more cell proliferation was found at proximal maxilla and mandible as well as maxillomandibular cleft without the noticeable changed pattern of cell death.And some of RA signaling, facial patterning, cell migration, and proliferation related genes and proteins showed the different expression pattern. The representative profile included the up-regulated RarΞ², AP-2, and actin capping protein and down-regulated Barx1, Dlx5 and tubulin Ξ± chain.Conclusively endogenous RA is actively involved in the early facial developmental patterning by the regulatory control of cell migration and proliferation and the modulation of facial skeletal patternings.ope
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