(Article begins on next page) The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters. Citation Sarkar, Subhendra N., Jason L. Mangosing, and Pooja R. Sarkar.2013. “Effect of Low Refocusing Angle in T1-Weighted Spin

HF radar can provide Over the Horizon detection of ships on very large oceanic areas, making use of the ionospheric refraction of

provides signal recognition training for Navy aviation warfare systems operators. EER is an air-deployed active multisensor acoustic system designed for P-3C aircraft. The active system relies on the detection of submarine echoes generated by reflected impulsive acoustic energy generated

. Calculations of signal intensity were shown to correspond to these measures. RESULTS: Optimum detectibility was obtained with an echo time of 29 msec and was independent of spoiling. As repetition time ranged from 30 msec to 700 msec, the optimal flip angle ranged from 17 ° to 66°. CONCLUSIONS: Gradient-echo

We propose and evaluate a method to identify tornadoes automatically in Doppler radar imagery by detecting hook echoes, which are important signatures of tornadoes, in Doppler radar precipitation density data. Our method uses a skeleton to represent 2D storm shapes. To characterize hook echoes, we

-models (and the respective constraints) and among themselves. This paper describes Echo, a tool that aims at simplifying this task by au-tomating inconsistency detection and repair using a solver based engine. Consistency between different models can be specified by bidirectional model transformations

Abstract. Peculiar near range echoes observed in summer with the SuperDARN HF radar in Finland are presented. The echoes were detected at four frequencies of 9, 11, 13 and 15 MHz at slant ranges of 105–250 km for about 100 min. Inter-ferometer measurements indicate that the echoes are returned from

Abstract In this paper, we proposed a performance improvement method of the double talk detector which can operate before the echo canceller converges. Microphone input signal is filtered by the linear prediction filter and this filtered signal is used for detection. The coefficients of the linear

:1. An important reason for the large amount of processing time is that users subjectively decide which soundings are outliers. There is an apparent need for an automated approach for detecting outliers that would reduce the extensive labor and obtain consistent results from the multibeam data cleaning process

Contrast echocardiography has been shown to be a sensitive method for detecting patent foramen ovale in embolic stroke, implying paradoxical embolization. However, not all two-dimensional echocardiographic studies are of diagnostic quality, and direct evidence for paradoxical cerebral embolization