Following the U.S. Clean Air Act Amendments of 1990, electric utilities dramatically increased their utilization of low-sulfur coal from the Powder River Basin (PRB). Recent studies indicate that railroads hauling PRB coal exercise a substantial degree of market power and that relative price changes in the mining and transportation sectors were contributing factors to the observed pattern of in...

This paper proposes a multichannel speech enhancement technique that leverages three essential cues embedded in the observed signal, i.e., spatial, spectral and temporal cues, for differentiating target clean speech components from noise. The proposed method estimates clean speech and noise features using a single optimization criterion by integrating two approaches, namely, exampleand model-ba...

We track multiple human subjects using ultra-wide band (UWB) radar based on their target signatures. To resolve the correspondence problem, the use of CLEAN algorithm is proposed. Walking two human subjects are measured by UWB radar. The feasibility of classification is investigated using the suggested method.

1098-4402= Strained-layer GaAs and strained-superlattice GaAs photocathodes are used at Jefferson Laboratory to create high average current beams of highly spin-polarized electrons. High electron yield, or quantum efficiency (QE), is obtained only when the photocathode surface is atomically clean. For years, exposure to atomic hydrogen or deuterium has been the photocathode cleaning technique e...

The automatic transcription process of spoken document results in several word errors, especially when very noisy conditions are encountered. Document representations based on neural embedding frameworks have recently shown significant improvements in different Spoken and Natural Language Understanding tasks such as denoising and filtering. Nonetheless, these methods mainly need clean represent...

Bulk analysis of environmental swipe samples taken within nuclear installations as part of routine IAEA inspections has proven to be a very sensitive analytical technique. The combination of chemical separations under very clean conditions with highly sensitive mass spectrometric measurements assists in the identification and characterization of uranium and plutonium signatures at ultratrace le...

 In this paper we characterize all $2times 2$ idempotent and nilpotent matrices over an integral domain and then we characterize all $2times 2$ strongly nil-clean matrices over a PID. Also, we determine when a $2times 2$ matrix  over a UFD is nil-clean.

Background: Health care-associated infections (HAI) continue to be a significant global community health issue and concern patient safety despite progress in infection control strategies. Among the most often reported illnesses acquired hospitals are surgical site (SSI) (HAI). Methods: This prospective observational study was held various Surgical departments of Bakhtawar Amin Trust Teaching Ho...