Results 91 to 100 of about 126,749 (256)

Optical phase‐sensitive amplification of higher‐order QAM signal with single Mach–Zehnder amplitude modulator

Electronics Letters, 2021
An optical phase‐sensitive amplifier (PSA) has the potential of low‐noise optical amplification. A frequency non‐degenerate PSA (ND‐PSA) can amplify arbitrary modulation formats including higher‐order QAM.
S. Shimizu, T. Kobayashi, T. Kazama, T. Umeki, K. Enbutsu, R. Kasahara, Y. Miyamoto   +6 more
doaj   +1 more source

POISSON project - II - A multi-wavelength spectroscopic and photometric survey of young protostars in L 1641

, 2011
Characterising stellar and circumstellar properties of embedded young stellar objects (YSOs) is mandatory for understanding the early stages of the stellar evolution.
A. Caratti o Garatti, Adams, Adams, Alecian, Alexander, Allen, Andre, Antona, Antoniucci, Antoniucci, B. Nisini, Baldovin-Saavedra, Baraffe, Beck, Bergin, Boogert, Buzzoni, Calvet, Caratti o Garatti, Caratti o Garatti, Caratti o Garatti, Cardelli, Carr, Chen, Chen, Chiar, Cieza, Cieza, Connelley, Connelley, Covey, Cushing, D. Lorenzetti, Davies, Davis, Davis, Dent, Di Francesco, Doppmann, Edwards, Enoch, Esteban, Esteban, Evans, Fang, Fazio, Fedele, Fischer, Forbrich, Garcia Lopez, Garcia Lopez, Garcia Lopez, Gerakines, Gorlova, Greene, Gullbring, Hamann, Hamann, Hartigan, Hartmann, Hartmann, Herczeg, Hernández, Hillenbrand, Houck, J. Eislöffel, Kelly, Kenyon, Kenyon, Kleinmann, Kóspál, Lada, Lahuis, Lahuis, Luhman, Makovoz, Manoj, Megeath, Merín, Meyer, Moorwood, Morales-Calderón, Morgan, Muzerolle, Muzerolle, Muzerolle, Natta, Natta, Nisini, Nisini, Nisini, Nussbaumer, Peterson, Podio, Prato, R. Garcia Lopez, Rayner, Reipurth, Rieke, Rieke, Rigliaco, Robitaille, Rossi, Rowles, S. Antoniucci, S. Cabrit, Shu, Sicilia-Aguilar, Sicilia-Aguilar, Siess, Skrutskie, Spezzi, Strom, T. Giannini, T. P. Ray, Takami, Terebey, Watson, White, Whitney, Whitney, Williams, York, Zacharias   +123 more
core   +3 more sources

A Search for Variability in Exoplanet Analogues and Low-Gravity Brown Dwarfs [PDF]

, 2018
We report the results of a $J$-band survey for photometric variability in a sample of young, low-gravity objects using the New Technology Telescope (NTT) and the United Kingdom InfraRed Telescope (UKIRT).
Allers, Katelyn N., Best, William M. J., Biller, Beth A., Bonavita, Mariangela, Bonnefoy, Mickaël, Brandner, Wolfgang, Buenzli, Esther, Crossfield, Ian, Deacon, Niall, Dupuy, Trent J., Eriksson, Simon, Henning, Thomas, Homeier, Derek, Janson, Markus, Kopytova, Taisiya, Liu, Michael C., Manjavacas, Elena, Metchev, Stanimir, Radigan, Jacqueline, Schlieder, Joshua, Vos, Johanna M.   +20 more
core   +2 more sources

Brain tissue classification in hyperspectral images using multistage diffusion features and transformer

Journal of Microscopy, EarlyView.
Abstract Brain surgery is a widely practised and effective treatment for brain tumours, but accurately identifying and classifying tumour boundaries is crucial to maximise resection and avoid neurological complications. This precision in classification is essential for guiding surgical decisions and subsequent treatment planning.
Neetu Sigger, Tuan T. Nguyen, Gianluca Tozzi   +2 more
wiley   +1 more source

Photoelectrochemical Properties of Gallium-nitride-based Photoanode in Tandem Cell Analyzed by AC Impedance Method

Electrochemistry
This study used an AC impedance method to quantitatively analyze the internal resistance in a tandem cell with a gallium-nitride (GaN) based photoanode for the water splitting reaction.
Yuya UZUMAKI, Yoko ONO, Kazuhide KUMAKURA, Takeshi KOMATSU, Atsushi ARATAKE, Hironobu MINOWA   +5 more
doaj   +1 more source

Estimating National and Foreign Trade Elasticities Using Generalized Transport Costs

Journal of Regional Science, Volume 65, Issue 2, Page 471-496, March 2025.
ABSTRACT We introduce the definition of two distinct trade elasticities corresponding to imports from regions located in the same country (national elasticities) and foreign regions located in other countries (foreign elasticities). We resort to a three‐tier nested CES utility structure to derive the corresponding demand gravity equations.
José L. Zofío, Jorge Díaz‐Lanchas, Damiaan Persyn, Javier Barbero   +3 more
wiley   +1 more source

Density‐Valued ARMA Models by Spline Mixtures

Journal of Time Series Analysis, EarlyView.
ABSTRACT This paper proposes a novel framework for modeling time series of probability density functions by extending autoregressive moving average (ARMA) models to density‐valued data. The method is based on a transformation approach, wherein each density function on a compact domain [0,1]d$$ {\left[0,1\right]}^d $$ is approximated by a B‐spline ...
Yasumasa Matsuda, Rei Iwafuchi
wiley   +1 more source

On-chip temporal focusing of elastic waves in a phononic crystal waveguide

Nature Communications, 2018
Here the authors demonstrate the temporal control of ultrasonic wave propagation in a one-dimensional phononic crystal waveguide. Four-wave mixing experiments are implemented, providing a platform on which to realize novel nonlinear phenomena in the ...
M. Kurosu, D. Hatanaka, K. Onomitsu, H. Yamaguchi   +3 more
doaj   +1 more source

“Corporate restructuring issues under the holding company structure – The NTT Case in Japan” [PDF]

This research paper focused on the corporate restructuring of Nippon Telegraph Telecommunication (NTT Group) under the pure holding company structure in 1999 and its implications.
Dinh, Huy Tran Ngoc, Kei, Nishino, Koh, Gek Pin, Liu, Yang, Maulana, Achmad Rizzqi   +4 more
core   +1 more source

Discovery of an optical bow-shock around pulsar B0740-28 [PDF]

, 2002
We report the discovery of a faint H-alpha pulsar wind nebula (PWN) powered by the radio pulsar B0740-28. The characteristic bow-shock morphology of the PWN implies a direction of motion consistent with the previously measured velocity vector for the ...
Aldcroft, Arzoumanian, B. M. Gaensler, B. W. Stappers, Bailes, Bell, Bland-Hawthorn, Blandford, Bucciantini, Chen, Cordes, D. H. Jones, Dopita, Fomalont, Gaensler, Hester, Koribalski, Kulkarni, McCulloch, Neckel, Stone, Taylor, Wilkin, Wilkin   +23 more
core   +2 more sources