Two different artificial neural networks (ANNs) for infrared spectra analysis are presented: the self-organising Kohonen ANN for mapping of the infrared spectra into a 2-D plane and the counterpropagation ANN for determination of the structural features of organic compounds based on their infrared spectra. The preliminary learning in the Kohonen ANN with all spectra from the collection yields t...

We present the Spitzer/IRS mid-infrared spectrum of the infrared-luminous ( ) brightest 11 L p 4 # 10 L IR , cluster galaxy (BCG) in the X-ray–luminous cluster Zwicky 3146 (Z3146; ). The spectrum shows strong z p 0.29 aromatic emission features, indicating that the dominant source of the infrared luminosity is star formation. The most striking feature of the spectrum, however, is the exceptiona...

Near-infrared emission lines provide unique diagnostics of the geometry, structure, kinematics, and excitation of η Carinae’s circumstellar ejecta, and give clues to the nature of its wind. The infrared spectrum is a strong function of position in η Car’s nebula, with a mix of intrinsic and reflected emission. Molecular hydrogen traces cool gas and dust in the polar lobes, while [Fe ii] blanket...

We present the mid-infrared spectrum of the planetary nebula IC 2448. In order to determine the chemical composition of the nebula, we use the infrared line fluxes from the Spitzer spectrum along with optical line fluxes from the literature and ultraviolet line fluxes from archival IUE spectra. We determine an extinction of CHβ = 0.27 from hydrogen recombination lines and the radio to Hβ ratio....

Background: Holothuroids (sea cucumbers) are members of the phylum echinodermata, which produce saponins. Saponins exhibit a wide spectrum of pharmacological and biological activities. In this study, we isolated the crude saponins from the body wall of the dominant Iranian species of sea cucumber, Holothuria leucospilota (H. leucospilota). The purpose of this study was to confirm the presence o...

copper vanadate nanostructures were prepared via ex-situ precipitation approach in presence of schiff-base ligand (n,n׳ -buthylenebis(acetylacetone iminato)dianion = acacbn) as a new capping agent. the effect of different cu sources and ph on the size, morphology and size distribution of copper vanadate nanostructures was investigated. the as-prepared products were characterized using x-ray dif...

Background: The infrared spectrum analysis can reveal subtle changes of the body’s infrared radiation. It provides a good method to research the specificity of acupoints. Objective: To compare the acupoint infrared radiation spectra of patients and healthy volunteers to determine whether patients’ spectra carry distinctive pathological information. Design, Setting, and Participants: The study i...

Heterogeneous face recognition aims to recognize faces across different sensor modalities. Typically, gallery images are normal visible spectrum images, and probe images are infrared images or sketches. Recently significant improvements in visible spectrum face recognition have been obtained by CNNs learned from very large training datasets. In this paper, we are interested in the question to w...