While internet-based technologies can open up greater awareness of the world or create self-perpetuating echo-chambers, Catholics & Cultures project aspires to do former. Aiming ‘widen lens’ on variety Catholic communities and practices, site delivers this goal by introducing viewers a vast array articles, pictures videos from around world. The organization country certain key features lived Ca...

This paper presents evaluations of a nonlinear-echo suppressor based on a frequency-domain model of highly nonlinear residual echo. The residual-echo model, which is based on correlation between spectral amplitudes of residual echo and echo replica, is evaluated by a regression analysis. The results justify the nonlinear-echo suppressor structure. The output signals are subjectively evaluated b...

Acoustic echo arises due to acoustic coupling between the loudspeaker and the microphone of a communication device. Acoustic echo cancellation and suppression techniques are used to reduce the acoustic echo. In this work we propose to first cancel the early echo, which is related to the early part of the echo path, and subsequently suppress the late echo, which is related to the later part of t...

PURPOSE To compare lesion enhancement after injection of gadopentetate dimeglumine on spin-echo and gradient-echo T1-weighted images. METHODS A total of 48 contrast-enhancing intracranial lesions were evaluated using a spin-echo and two gradient-echo T1-weighted pulse sequences. Percent contrast, contrast-to-noise, and signal-to-noise measurements were made on the spin-echo T1-weighted, three...

Acoustic echoes arise whenever there is acoustic coupling between a loudspeaker and a microphone. A traditional solution for eliminating the undesired echo signal is an acoustic echo canceler (AEC), which identifies the echo path between a loudspeaker and a microphone by means of an adaptive filter. The echo signal can be canceled successfully when the modeling filter approaches the true echo p...

i Abstract Repetition of signals due to reflection from ceiling, wall, floor and other objects in an enclosed environment can be perceived as the acoustic echo. It is resulted from the hands-free operation on the cellular, teleconferencing application and hearing aid system. Since the echo propagates in an enclosed environment, e.g. a room, the room acoustics acts as a filter. To remove the aco...

BACKGROUND To resolve the current shortage of donor hearts, we established the Adonhers protocol. An upward shift of the donor age cut-off limit (from the present 55 to 65 years) is acceptable if a stress echo screening on the candidate donor heart is normal. This study aimed to verify feasibility of a "second opinion" of digitally transferred images of stress echo results to minimize technical...

From October 26 to November 12, 2010, Indonesia’s Mount Merapi blew its top in the volcano’s largest series of eruptions in decades. It spewed ash and lava rock thousands of meters into the air. Hundreds of thousands of villagers fled, abandoning their homes along with more than 1,000 ha of farm fields to the scalding ash, rock, and mud spilling down the slope (1, 2). The following July, space ...