We discuss the very different methods in each wavelength band for selecting and finding Active Galactic Nuclei (AGN). We briefly review the history of the different techniques for finding AGN and compare and contrast the advantages and difficulties of selection in different wavelength bands. We stress the strong selection effects in each wavelength band and the difficulty of defining complete s...

We discuss the very different methods in each wavelength band for selecting and finding Active Galactic Nuclei (AGN). We briefly review the history of the different techniques for finding AGN and compare and contrast the advantages and difficulties of selection in different wavelength bands. We stress the strong selection effects in each wavelength band and the difficulty of defining complete s...

A new approach to constraint-based path selection for dynamic routing and wavelength allocation in optical networks based on Wavelength Division Multiplexing (WDM) has been proposed. The Distributed discovery wavelength path selection algorithm (DWP) proposed in the previous work takes a longer time for path selection even though it could solve some conflicting constraints imposed by electronic...

Wavelength selection is a critical step for producing better prediction performance when applied to spectral data. Considering the fact that the vibrational and rotational spectra have continuous features of spectral bands, we propose a novel method of wavelength interval selection based on random frog, called interval random frog (iRF). To obtain all the possible continuous intervals, spectra ...

This paper illustrates a filter configuration which uses a single ring resonator of larger radius connected to a grating resonator at its drop port to achieve single wavelength selectivity and switching property with spectral features suitable for on-chip wavelength selection applications. The proposed configuration is expected to find applications in silicon photonics devices such as, on-chip ...

This is a tutorial paper on the traffic grooming optimization in mesh Wavelength Division Multiplexing (WDM) networks for static traffic patterns. The traffic grooming technique provides a two-layer traffic engineering capability by aggregating and routing low-bandwidth traffic flows from the upper layer over re-configurable highbandwidth connections in the lower layer. This paper demonstrates ...

An objective wavelength selection method is proposed for near-infrared (NIR) spectroscopy mainly to overcome the possible subjectivity introduced by moving window partial least squares regression (MWPLS). This improved procedure (iMWPLS) introduced an indicator to evaluate importance of each wavelength and then all wavelengths were ranked by these indicators. On the basis of the indicator ranki...

The selection of the axial wavelength in axisymmetric Taylor-vortex flow was studied by numerical experiments where the inner cylinder speed was linearly increased from subcritical to supercritical values over a finite ramp time to values not far above Rec. For impulsive increases of the inner cylinder speed (zero ramp time) the preferred axial wavelength was less than the critical wavelength. ...

We report novel results on the improvement in wavelength stability to less than 1-GHz and sub-80ns wavelength tuning times using intelligent wavelength selection in a compact three-section DBR laser module without an active locking mechanism. The performance of the module in terms of switching time and temperature induced wavelength drift is compared to other semiconductor tuneable lasers. The ...