Search Results - "Urata, R"

Simulation of the 2018 Global Dust Storm on Mars Using the NASA Ames Mars GCM: A Multitracer Approach by Bertrand, T., Wilson, R. J., Kahre, M. A., Urata, R., Kling, A.

“…Global dust storms are the most thermodynamically significant dust events on Mars. The most recent of these events occurred in 2018. Although it was monitored…”
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A compact low-power label swapper for asynchronous burst optical packets based on an optically clocked transistor array by Urata, R., Takahashi, R., Nakahara, T., Suzuki, H.

“…We have constructed a prototype optical label swapper module by integrating an optically clocked transistor array InP optoelectronic integrated circuit (OEIC)…”
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An Optically Clocked Transistor Array for High-Speed Asynchronous Label Swapping: 40 Gb/s and Beyond by Urata, R., Takahashi, R., Suemitsu, T., Nakahara, T., Suzuki, H.

“…We describe the development of an optically clocked transistor array (OCTA) interface device for label swapping high-speed asynchronous burst optical packets…”
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Low-temperature growth of GaAs on Si used for ultrafast photoconductive switches by Kai Ma, Urata, R., Miller, D.A.B., Harria, J.S.

“…GaAs was grown directly on silicon by molecular beam epitaxy (MBE) at low substrate temperature (/spl sim/250/spl deg/C). Both the silicon wafer cleaning and…”
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A 40-GHz-bandwidth, 4-bit, time-interleaved A/D converter using photoconductive sampling by Nathawad, L.Y., Urata, R., Wooley, B.A., Miller, D.A.B.

“…GaAs photoconductive switches have been integrated with two parallel 4-bit CMOS analog-to-digital (A/D) converter channels to demonstrate the time-interleaved…”
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Demonstration of the interconnection of two optical packet rings with a hybrid optoelectronic packet router by Chiaroni, D, Urata, R, Gripp, J, Simsarian, J E, Austin, G, Etienne, S, Segawa, T, Pointurier, Y, Simonneau, C, Suzaki, Y, Nakahara, T, Thottan, M, Adamiecki, A, Neilson, D, Antona, J C, Bigo, S, Takahashi, R, Radoaca, V

“…We demonstrate the interconnection of two optical packet switching systems: a hybrid optoelectronic packet router and two optical packet rings. Error-free…”
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An optically clocked transistor array with dual serial-to-parallel and parallel-to-serial conversion capability for optical label swapping by Urata, R., Takahashi, R., Nakahara, T., Takahata, K., Suzuki, H.

“…We propose an optically clocked transistor array optoelectronic integrated circuit (OEIC) for both serial-to-parallel and parallel-to-serial conversion…”
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Photonic A/D conversion using low-temperature-grown GaAs MSM switches integrated with Si-CMOS by Urata, R., Nathawad, L.Y., Takahashi, R., Kai Ma, Miller, D.A.B., Wooley, B.A., Harris, J.S.

“…By linking the unique capabilities of photonic devices with the signal processing power of electronics, photonically sampled analog-to-digital (A/D) conversion…”
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A novel optically clocked transistor array using differential operation, for parallel-to-serial conversion by Ishikawa, H, Urata, R, Nakahara, T, Suzaki, Y, Sugiyama, H, Takahashi, R

“…We propose and demonstrate a novel, differentially operated optically clocked transistor array optoelectronic integrated circuit for high bit-rate and stable…”
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Ultrafast differential sample and hold using low-temperature-grown GaAs MSM for photonic A/D conversion by Urata, R., Takahashi, R., Sabnis, V.A., Miller, D.A.B., Harris, J.S.

“…This letter demonstrates an ultrafast sample and hold circuit using optically triggered metal-semiconductor-metal switches made of low-temperature-grown GaAs…”
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Ultrafast optoelectronic sample-and-hold using low-temperature-grown GaAs MSM by Urata, R., Takahashi, R., Sabnis, V.A., Miller, D.A.B., Harris, J.S.

“…We demonstrate 20-GHz input bandwidth of an optoelectronic sample-and-hold circuit using optically triggered metal-semiconductor-metal switches made of…”
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P4500Cellular senescence of endothelial cells impairs angiogenesis by altering energy metabolism through p53-tigar axis by Urata, R, Ikeda, K, Nakagawa, T, Hoshino, A, Honda, S, Yagi, N, Emoto, N, Matoba, S

“…Abstract Background Ischemic disease is prevalent in elderly population due to impaired angiogenesis. Endothelial cell (EC) generates energy largely via…”
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3306Endothelial cell senescence accelerates atherosclerosis by enhancing monocyte recruitment via hyper-reactivity to inflammatory stimuli by Honda, S, Ikeda, K, Hoshino, A, Urata, R, Yagi, S, Emoto, N, Matoba, S

“…Abstract Background Ageing is a significant risk factor for atherosclerotic diseases. Vascular senescence has been considered to play an important role in the…”
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The NASA Ames legacy Mars global climate model: Radiation code error correction and new baseline water cycle simulation by Kahre, M.A., Haberle, R.M., Wilson, R.J., Urata, R.A., Steakley, K.E., Brecht, A.S., Bertrand, T., Kling, A., Batterson, C.M., Hartwick, V., Harman, C.E., Gkouvelis, L.

“…Haberle et al. (2019) documented the status of the NASA Ames Legacy Mars Global Climate Model (GCM) and presented a baseline water cycle simulation. Since…”
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Impact of the coagulation of dust particles on Mars during the 2018 global dust storm by Bertrand, T., Kahre, M., Urata, R., Mattaanen, A., Montmessin, F., Wilson, J., Wolff, M.

“…Coagulation of particles occurs when two particles collide and stick together. In the Martian atmosphere, coagulation of dust would increase the dust effective…”
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Hybrid optoelectronic router for asynchronous optical packets by Takahashi, R., Urata, R., Takenouchi, H., Nakahara, T.

“…A hybrid optoelectronic router which optimally utilizes both optical and electrical technologies is promising for reducing power, size, and latency, with the…”
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Asynchronous burst optical label swapper based on an optically clocked transistor array by Urata, R, Takahashi, R, Nakahara, T, Suzuki, H

“…We have fabricated a prototype label swapper module by integrating an optically-clocked-transistor-array InP OEIC with CMOS. The prototype achieves…”
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An optically clocked transistor array for dual serial-to- parallel and parallel-to-serial conversion of optical packets by Urata, R., Takahashi, R., Nakahara, T., Takahata, K., Suzuki, H.

“…We propose an optically clocked transistor array which performs both serial-to-parallel and parallel-to-serial conversion (time demux/mux) of incoming/outgoing…”
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Linear differential electro-optic conversion of sampled voltage signals using a MSM and multiple quantum well modulators by Chin, H., Urata, R., Kai Ma, Miller, D.A.B., Harris, J.S.

“…We demonstrate a photoconductive switch hybridly integrated with quantum-well self-electrooptic effect devices, capable of sampling input voltages with…”
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Linear electro-optic conversion of sampled voltage signals using a low-temperature-grown GaAs MSM and a multiple quantum well modulator by Chin, H., Urata, R., Chen, R., Miller, D.A., Kai Ma, Harris, J.S.

“…We present the hybrid integration of a low-temperature-grown GaAs metal-semiconductor-metal photoconductive switch with a GaAs SEED optical modulator, for…”
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