Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Takuma Nakamura"'
Publikováno v:
Annals of Medicine, Vol 56, Iss 1 (2024)
Objective We hypothesized that patients with amyotrophic lateral sclerosis (ALS) face a dilemma between motivation to live and difficulty in living, and brain–machine interfaces (BMIs) can reduce this dilemma. This study aimed to investigate the pr
Externí odkaz:
https://doaj.org/article/8e0c58aa56004705a0e29e2d61c08eb1
Publikováno v:
APL Photonics, Vol 9, Iss 5, Pp 051301-051301-7 (2024)
Non-destructive testing (NDT) is crucial for ensuring product quality and safety across various industries. Conventional methods, such as ultrasonic, terahertz, and x-ray imaging, have limitations in terms of probe-contact requirement, depth resoluti
Externí odkaz:
https://doaj.org/article/006135195cd04cdc8caf99eaaca57fb7
Publikováno v:
Ultrafast Science, Vol 4 (2024)
Raman scattering spectroscopy is widely used as an analytical technique in various fields, but its measurement process tends to be slow due to the low scattering cross-section. In the last decade, various broadband coherent Raman scattering spectrosc
Externí odkaz:
https://doaj.org/article/ee84ade4216440a4a3697086d48776d8
Autor:
Yifan Liu, Dahyeon Lee, Takuma Nakamura, Naijun Jin, Haotian Cheng, Megan L. Kelleher, Charles A. McLemore, Igor Kudelin, William Groman, Scott A. Diddams, Peter T. Rakich, Franklyn Quinlan
Publikováno v:
APL Photonics, Vol 9, Iss 1, Pp 010806-010806-7 (2024)
We demonstrate a high finesse, microfabricated mirror-based, air-gap cavity with volume less than 1 ml, constructed in an array, that can support low-noise microwave generation through optical frequency division. We use the air-gap cavity in conjunct
Externí odkaz:
https://doaj.org/article/ca8b52d7e0d6450d97da562c1a4afd50
Autor:
Kazuki Hashimoto, Takuma Nakamura, Takahiro Kageyama, Venkata Ramaiah Badarla, Hiroyuki Shimada, Ryoich Horisaki, Takuro Ideguchi
Publikováno v:
Light: Science & Applications, Vol 12, Iss 1, Pp 1-10 (2023)
We develop upconversion time-stretch infrared spectroscopy, which enables high-speed and high-resolution broadband mid-infrared spectroscopy with over 1000 spectral elements at a rate of more than 10 MSpectra s−1.
Externí odkaz:
https://doaj.org/article/acf343483f9a420091cbeee99f819609
Autor:
Dahyeon Lee, Takuma Nakamura, Andrew J. Metcalf, Nathan E. Flowers-Jacobs, Anna E. Fox, Paul D. Dresselhaus, Franklyn Quinlan
Publikováno v:
APL Photonics, Vol 8, Iss 8, Pp 086115-086115-9 (2023)
We demonstrate a sub-GHz resolution, fully programmable Fourier-domain pulse shaper capable of generating arbitrary optical pulse patterns for superconducting circuit platforms. This high resolution allows line-by-line pulse shaping of a 1 GHz-spaced
Externí odkaz:
https://doaj.org/article/ffb94ac171274c5597e2fbfd229dc541
Autor:
Vertti Tarvus, Lucile Turc, Hongyang Zhou, Takuma Nakamura, Adriana Settino, Kevin Blasl, Giulia Cozzani, Urs Ganse, Yann Pfau-Kempf, Markku Alho, Markus Battarbee, Maarja Bussov, Maxime Dubart, Evgeniy Gordeev, Fasil Tesema Kebede, Konstantinos Papadakis, Jonas Suni, Ivan Zaitsev, Minna Palmroth
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 62 (2024)
The Kelvin–Helmholtz instability (KHI), characterized by vortices forming at a perturbed velocity shear layer, is a prominent candidate mechanism for mass, momentum, and energy transport across boundaries with velocity shear in various space plasma
Externí odkaz:
https://doaj.org/article/ce474053f32941f4a5031fb5d69feeac
Autor:
Kyoung-Joo Hwang, Chih-Ping Wang, Katariina Nykyri, Hiroshi Hasegawa, Mark B. Tapley, James L. Burch, Stephen A. Fuselier, Jerry Goldstein, Kyunghwan Dokgo, Takuma Nakamura, Mikhail Sitnov, Xuanye Ma, Yu Lin, Xue Wang
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
About sixty years ago it was proposed that the solar wind entry and changes in magnetospheric magnetic topology via dayside magnetic reconnection initiate the magnetospheric convection over the poles. On the other hand, the quasi-viscous interaction
Externí odkaz:
https://doaj.org/article/4a232cc126634439960a4a1fa62f768c
Publikováno v:
IEEE Photonics Journal, Vol 13, Iss 3, Pp 1-12 (2021)
High-fidelity photodetection enables the transfer of the low noise inherent to optical oscillators to the microwave domain. However, when photodetecting optical signals of the highest timing stability, photodiode flicker (1/f) noise can dominate the
Externí odkaz:
https://doaj.org/article/9e642435e7d2495083d92b2afbb4446f
Autor:
Masaaki Chiwa, Yasuhiro Utsumi, Naoaki Tashiro, Yuko Yasuda, Ken’ichi Shinozuka, Yang Ru, Nao Nagano, Shusuke Murata, Takuma Nakamura, Kohei Yamauchi, Yuji Kabemura, Tatsuro Ando, Hiroshi Sawamura
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Abstract Rawanbuki, a variety of Japanese butterbur (Petasites japonicus subsp. giganteus), grow naturally along the Rawan River, Hokkaido, northern Japan. Most plants reach 2–3 m in height and 10 cm in diameter in 2 months and are much larger than
Externí odkaz:
https://doaj.org/article/1d7c6da31b7f42b0ada9e32d1459eab1