We present the rst imaging circular polarimetry of the Orion Molecular Cloud, OMC-1. The observations, taken in the J , H , K n and nbL bands, reveal a complex pattern of circular polarisation. Globally, there is a background circular polarisation of the order of 2 percent in the K n band, conforming to the typical quadrupolar patterns that have been observed in other outtow sources. Overlaying...

in this paper, a new topology for boost z-source inverterbased on switched-inductor cell is proposed. the operating modes of the proposed inverter are analyzed and also a suitable control method to generate the trigger signals of the inverter is presented. having a common earth between the input source and inverter and capability to generate a higher voltage gain by using lower amounts of the d...

An analysis is performed to determine the accuracy with which an ac heterodyne lateral shear interferometer can measure wavefront aberrations if a white light extended source is used with the interferometer, and shot noise is the predominate noise source. The analysis shows that for uniform circular or square sources larger than a derived minimum size, the wavefront measurement accuracy depends...

Both decabromodiphenyl ether (BDE 209) and ethane (DBDPE) are still produced in large quantities China, especially the Shandong Province closed to Bohai Sea (BS). This study conducted a comprehensive investigation of distribution budget brominated flame retardants (BFRs) BS. BDE 209 was predominant BFR most investigated rivers flowing into BS, although DBDPE exceeded certain as result replaceme...

The number of infrared beamlines at synchrotron facilities is expending worldwide. Due to the long wavelength of the radiation in the infrared region, the optimum collection of the emitted photons requires large opening angles, both vertically and horizontally (order of few tens of mrad). Most of the infrared beamlines use toroid shaped mirrors, or elliptical mirror to conjointly focus both the...

lag is a general term applied to coarse grained (> 2 mm), hard, but partially weathered rockfragments, which are concentrated at the surface through attrition of finer materials. based on morphology,mineralogy and the origin of lag from the cobar region of australia, lag may be conveniently grouped intothree broad morpho-mineralogical categories; (a) those with a rough, blocky, lithic morpholog...

We report on mid-IR observations of the central region in the Trifid nebula, carried out with ISOCAM in several broad-band infrared filters and in the low resolution spectroscopic mode provided by the circular variable filter. Analysis of the emission indicates the presence of a hot dust component (500 to 1000 K) and a warm dust component at lower temperatures (∼ 150 − 200 K) around several mem...