slow sand filters are as a proper technology for pre-treatment of raw water, with a fine and medium trubidity in small communities in developing countries. thus, with a minimum operation cost and minimum need for expest bodies have the maximum efficiency. the purpose of this research is carried out to evaluate the efficiency of two processes of horizontal flow roughing filter and vertical flow ...

— This paper describes a method for video sequences denoising that exploits extra-information provided by the image sensor. Fixed Pattern Noise and Temporal Noise are removed by analyzing a series of lines placed at the top of the imager.

BACKGROUND Distal embolization of debris during percutaneous carotid artery stenting may result in neurological deficit. Filter devices for cerebral protection potentially reduce the risk of embolization. METHODS AND RESULTS Elective carotid stent implantation using 3 different types of distal filter protection devices was attempted in 88 consecutive lesions (84 patients) in the internal caro...

Brain-driven interfaces depend on estimation procedures to convert neural signals to inputs for prosthetic devices that can assist individuals with severe motor deficits. Previous estimation procedures were developed on an application-specific basis. Here we report a coherent estimation framework that unifies these procedures and motivates new applications of prosthetic devices driven by action...

Usage of cellular phones and small form factor devices as PDAs and other handhelds has been increasing rapidly. Their use is varied, with scenarios such as communication, internet browsing, audio and video recording just to name a few. This requires better sound capturing system as the sound source is already at larger distance from the device’s microphone. In this paper we propose sound captur...

Lakshminarayan Srinivasan, Uri T. Eden, Sanjoy K. Mitter, and Emery N. Brown Center for Nervous System Repair, Department of Neurosurgery, Massachusetts General Hospital, Boston; Laboratory for Information and Decision Systems, Department of Electrical Engineering and Computer Science and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge; Harvard/MIT D...

Abstract: This work contains a brief study of a new structure of a low-pass filter of N th order, operating in low frequencies. The low-pass filter is designed with CMOS technology and biased to work in weak inversion. The dimension of the lay-out of the circuit and very low power consumption enables this new structure be integrated in a single chip. The parameter n, dependent of the fabricatio...

Approximately 20 years ago, Jacque Theron suggested that embolic protection with balloon occlusion during carotid angioplasty could reduce procedure-related strokes.1 This was documented in his report, with a >50% reduction in strokes when using distal balloon occlusion. Henry et al2 described similar results using the PercuSurge balloon (Medtronic, Inc., Santa Rosa, CA) for distal protection. ...

We demonstrate integrated, mode-evolution-based, 1x2 port high-pass/low-pass filters in a silicon photonics platform that can simultaneously achieve broadband operation, single cutoff wavelength, and a record high filter roll-off of 2.5 dB/nm for the first time. OCIS codes: (130.7408) Wavelength filtering devices; (230.1360) Beam splitters; (130.3120) Integrated optics devices.

Diesel engines have been a mainstay within many industries since the early 1900s. Exposure to diesel particulate matter (DPM) is a major issue in many industrial workplaces given the potential for serious health impacts to exposed workers; including the potential for lung cancer and adverse irritant and cardiovascular effects. Personal respiratory protective devices are an accepted safety measu...