Artifact-centric systems are a recent paradigm for representing and implementing business processes. We present further results on the verification problem of artifact-centric systems specified by means of FO-CTL specifications. While the general problem is known to be undecidable, results in the literature prove decidability for artifact systems with infinite domains under boundedness and cond...

A very important artifact corrupting Magnetic Resonance (MR) Images is the RF inhomogeneity, also called Bias artifact. The visual effect produced by this kind of artifact is an illumination variation which afflicts these kind of medical images. In literature a lot of works oriented to the suppression of this artifact can be found; among them, those ones based on homomorphic filtering offer an ...

An electroencephalogram (EEG) is often corrupted by different types of artifacts. Many efforts have been made to enhance its quality by reducing the artifact. The EEG contains the technical artifacts (noise from the electric power source, amplitude artifact, etc.) and biological artifacts (eye artifacts, ECG and EMG artifacts). This paper is focused on eyeblinking artifact detection from the vi...

BACKGROUND With advances in technology and increasing demand, wearable biosignal monitoring is developing and new applications are emerging. One of the main challenges facing the widespread use of wearable monitoring systems is the motion artifact. The sources of the motion artifact lie in the skin-electrode interface. Reducing the motion and deformation at this interface should have positive e...

Despite considerable research on information systems adoption and use by individuals, little is known about how the information system (IS) artifact itself affects adoption and use. Prior research has generally treated the IS artifact as a “blackbox” such that it remained peripheral to the central questions asked regarding adoption and use. This paper presents a feature-centric “IS artifact rat...

In this article we present an artifact due to the conventional use of periodic boundary condition (PBC) which produces misleading results on charge transport behavior at low field regime. When simulated using PBC, artifact produces a negative field dependence of mobility (NFDM) at low field regime even when the positional disorder is neglected. The artifact is due to the extra bias the carrier ...

OBJECTIVE Simultaneous acquisition of electroencephalogram (EEG) and functional magnetic resonance imaging (fMRI) enables studies of brain activity at both high temporal and high spatial resolution. However, EEG acquired in a magnetic field is contaminated by ballistocardiogram (BKG) artifact. The most commonly used method of BKG artifact reduction, averaged artifact subtraction (AAS), was not ...

Introduction With specific combinations of B0-field, B1-field, and gradient field, peripheral signals outside the prescribed field of view (FOV) can fold back onto the image, resulting in a bright spot, a series of spots, a band, or a “feather-like” artifact along the phase encoding direction. In a fast spin echo (FSE) image, this type of artifact has been termed as cusp artifact [1,2], annefac...

In four experiments, Malt and Sloman [Malt, B. C., & Sloman, S. A. (2007). Category essence or essentially pragmatic? Creator’s intention in naming and what’s really what. Cognition, 105, 615–648] show that the naming of artifacts is affected by discourse context. They see this phenomenon as posing a problem for the intentional-history theory of artifact categorization (e.g., [Bloom, P. (1996)....

Ballistocardiogram and imaging artifacts cause major interference with simultaneous electroencephalogram (EEG) and functional magnetic resonance imaging (fMRI) recording. In particular, the large amplitude of the imaging artifact precludes easy retrieval of EEG signals during fMRI scanning. Recording with 20,000-Hz digitization rate combined with 3000-Hz low-pass filter revealed the real wavefo...