This paper examines the change drivers and challenges involved in transitioning of Water Research Commission’s Amanzi for Food training agricultural educators farmers’ face-to-face co-engaged course to an online aligned with Education Sustainable Development (ESD) (www.amanziforfood.co.za). The study drew on system thinking analyse components within development activity system. Insights from st...

OBJECTIVE To compare the suitability of CO2 laser with steel instruments for margin excision in transoral laser microsurgery. METHODS Prospective randomized blinded study. Patients with glottic cancer undergoing laser resection were randomized to margin excision by either steel instruments or CO2 laser. Margins were analyzed for size, interpretability and degree of artifact by a pathologist w...

A test artifact, intended for standardization, is proposed for the purpose of evaluating the performance of additive manufacturing (AM) systems. A thorough analysis of previously proposed AM test artifacts as well as experience with machining test artifacts have inspired the design of the proposed test artifact. This new artifact is designed to provide a characterization of the capabilities and...

We introduce a spatial artifact detection method for a surface electromyography (EMG) based speech recognition system. The EMG signals are recorded using grid-shaped electrode arrays affixed to the speakers face. Continuous speech recognition is performed on the basis of these signals. As the EMG data are highdimensional, Independent Component Analysis (ICA) can be applied to separate artifact ...

PURPOSE To describe a case where detection of blood flow in the central retinal artery and the central retinal vein was limited by an artifact evoked by the optic disc drusen. METHODS Case report. RESULTS During color Doppler sonography, examination of optic disc drusen may generate an artifact--the so-called twinkling artifact--which can simulate blood flow and make evaluation of the central...

In this paper, a new model for adaptive artifact cancelation in impedance cardiography (ICG) signals is presented. It is a hybrid model based on wavelet decomposition and an adaptive filter. A novel feature of this model is the implementation of reference-free adaptive artifact cancellers (AAC). For this implementation, the reference signal is constructed using a wavelet transformation. During ...

The artifact ecologies emerging from an increasing number of interactive digital artifacts, capable of communicating with each other wirelessly, have created an interaction space where software applications are no longer limited by the physical boundaries of a single device. With the new opportunities follows an added complexity that interaction designers need to address. Previous work have sho...

The purpose of this research is to develop a research model that examines the impact of mobile social capital on technology adoption through IT artifact Influence. To do so, we suggest that mobile networks of practice as social actors affect technology use through the userIT artifact interaction in which mobile social capital lies, thus differentiating it from social capital and bestowing uniqu...

Gwin JT, Gramann K, Makeig S, Ferris DP. Removal of movement artifact from high-density EEG recorded during walking and running. J Neurophysiol 103: 3526–3534, 2010. First published April 21, 2010; doi:10.1152/jn.00105.2010. Although human cognition often occurs during dynamic motor actions, most studies of human brain dynamics examine subjects in static seated or prone conditions. EEG signals ...

A "featherlike" artifact, termed a cusp artifact, is sometimes seen along the phase-encoding direction in sagittal or coronal fast spin echo images. This artifact arises from the spins, at a location distant from the magnet isocenter, that are excited and aliased to the field of view because their precession frequency is similar to those at the isocenter. Such a situation is created due to a co...