As an open system, synthetic aperture radar (SAR) inevitably receives radio frequency interference (RFI) generated by electromagnetic equipment in the same band. The existence of RFI seriously affects SAR signal processing and image interpretation. In recent years, many algorithms models related to mitigation have been proposed. However, most that focus on effectively mitigating is insufficient...

Synthetic Aperture Radar (SAR) satellite images are used increasingly more for Earth observation. While SAR useable in most conditions, they occasionally experience image degradation due to interfering signals from external radars, called Radio Frequency Interference (RFI). RFI affected often discarded further analysis or pre-processed remove the RFI. However, few on-ground radars can cause and...

The objectives of this study were to determine the extent to which selection for decreased residual feed intake (RFI) affects pork composition and quality. Pigs from the fifth generation of selection for decreased RFI (select) and a randomly selected line (control) were utilized. Two experiments were conducted. In Exp. 1, barrows (22.6 ± 3.9 kg) from select and control lines were paired based o...

In this research, the traditional fuzzy ISODATA ( FI ) algorithm is integrated with probabilistic relaxation labeling ( PRL ) algorithm to form a new clustering algorithm called relaxed fuzzy ISODATA ( RFI ). During the clustering process, both the fuzzy membership function values and local contextual information are employed for grouping data into clusters. The RFI algorithm is considered for ...

Cross correlation of an RFI reference signal with the corrupted radio astronomy data channels permits construction of the adaptive correction that is suitable for radio spectroscopy where time-averages are recorded. The reference signal is constructed from the cross power spectrum of the signals from the two polarizations of a reference horn pointed at the source of the RFI signal. The method i...

Understanding the application resilience in the presence of faults is critical to address the HPC resilience challenge. Currently we largely rely on random fault injection (RFI) to quantify the application resilience. However, RFI provides liŠle information on how fault tolerance happens, and RFI results are o‰en not deterministic due to its random nature. In this paper, we introduce a new meth...

Synthetic aperture radar (SAR) has proven to be a powerful remote sensing instrument for underground and obscured object detection. However, SAR echoes are often contaminated by radio frequency interferences (RFI) from multiple broadcasting stations. Essentially, RFI suppression problem is one-dimensional stationary time series denoising problem. This article proposed a novel RFI suppression al...

The human H(+)-coupled di-/tripeptide transporter (hPEPT1) mediates intestinal absorption of dietary di- and tripeptides, as well as several peptidomimetic drug compounds. The aim of the present study was to investigate the possible role of the hPEPT1 variant hPEPT1-RF in hPEPT1 regulation. However, the proposed hPEPT1-RF mRNA sequence could not be detected in Caco-2 cells or in human intestina...

Radio astronomical observations are increasingly corrupted by radio frequency interferences (RFIs), and real time filtering algorithms are becoming essential. In this paper, it is shown how spatial processing techniques can limit the impact of the incoming RFIs for phased array radio telescopes. The proposed approaches are based on estimation of the RFI spatial signature. It requires the diagon...