The motivation for adaptive filtering in subbands stems from two well-known problems in LMS-based fullband adaptive filtering. First, the convergence and tracking can be very slow if the input correlation matrix is ill conditioned such as that found in speech. Second, very high order adaptive filters are computationally expensive. Adaptive filtering in subbands has been proposed to overcome the...

cooperative alliances also arises from the need to address emerging concerns, such as the increase in shipper requirements and the role of the Internet and ICT in enhancing competition. Thus, a key operational challenge for carrier–carrier collaborative networks is to address these issues within a cooperative alliance and create win–win situations for all members in the alliance. LTL carrier co...

Using Grid technologies for enhance e-learning systems represents an attractive, but a laborious solution if we consider not only the benefits, but also the difficulties that must to be overcome. This paper presents our research for development of a Learning Management System (LMS) that integrates Grid capabilities in an efficient and flexible e-learning solution. Certain independence was desir...

INTRODUCTION In countries with high burden of HIV, major programmatic challenges have been identified to preventing new infections among children and scaling up of treatment for pregnant mothers. We initiated this study to examine operational approaches that were used to enhance implementation of PMTCT interventions in Muhima health Centre (Kigali/Rwanda) from 2007 to 2010. METHODS The prospe...

OBJECTIVE To institute and evaluate the benefits of an enhanced recovery after surgery (ERAS) program across three hospitals in Victoria. DESIGN, SETTING AND PARTICIPANTS We used a before-and-after quality improvement study design consisting of three phases: pre-ERAS program data collection from March to September 2012; ERAS training and implementation during September 2012; and change perfor...

Online forum is part of a Learning Management System (LMS) environment in which students share their opinions. This study attempts to investigate the perceptions of students towards online forum and their patterns of listening behavior during the forum interaction. The students’ perceptions were measured using a questionnaire, in which seven dimensions were used involving online experience, ben...

BACKGROUND Maximum performance and long-term stability of bilateral cochlear implants has become an important topic because there has been increasing numbers of recipients of bilateral cochlear implants. PURPOSE To determine the performance over time (up to 6yr) of subjects with simultaneous bilateral cochlear implants (CI+CI) on word recognition and localization. RESEARCH DESIGN Over-time ...

Supervised channel estimation in OFDM systems typically consists in the interpolation/smoothing over the entire time-frequency grid of the channel gains estimated on the pilot subcarriers. In this process, only statistical informations about the propagation channel are exploited (i.e., Doppler spectrum and power-delay profile). We propose a novel technique that is based on a general parametric ...

Standard evolutionary theories of aging and mortality, implicitly based on mean-field assumptions, hold that programed mortality is untenable, as it opposes direct individual benefit. We show that in spatial models with local reproduction, programed deaths instead robustly result in long-term benefit to a lineage, by reducing local environmental resource depletion via spatiotemporal patterns ca...

Learning Management Systems (LMS) generally offer big repositories of learning material, but the lack of publicly available metadata to describe the learning objects makes it very difficult to share and reuse these objects. If metadata could be generated for these objects in order to index them in Learning Object Repositories (LOR), the gained amount of resources could solve the sub-critical ma...