Accepted 10 March 1998 A 36-year-old man with a 3-year history of biopsy-proven pancolitis was referred to our hospital. His clinical course had a relapsing remitting pattern of bloody diarrhoea responsive to both steroids and mesalazine. On hospital admission he had a 7-day history of bloody diarrhoea. On physical examination, he was conscious, alert, oriented and haemodynamically stable. The ...

Papilloedema is a term that describes a non-inflammatory swelling of the optic nerve head that is now restricted only to patients with increased intracranial pressure. It thus implies a clinical diagnosis in addition to a physical finding while the term optic disc swelling is employed for the mere clinical description. We describe a haemodialysis patient who developed sudden onset of optic disc...

Locate our position is one of the tasks we naturally do with our vision and our memory. However, ensuring this task in an artificial way is still a challenge for the whole community of computer vision. This paper presents a detailed literature review of pedestrian localization systems and their technologies. In the context of the visually impaired pedestrian navigation assistance, we also prese...

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Anecdotal reports that time "flies by" or "slows down" during emotional events are supported by evidence that the motivational relevance of stimuli influences subsequent duration judgments. Yet it is unknown whether the subjective quality of events as they unfold is altered by motivational relevance. In a novel paradigm, we measured the subjective experience of moment-to-moment visual perceptio...

The recognition of faces has been the focus of an extensive body of research, whereas the preliminary and prerequisite task of detecting a face has received limited attention from psychologists. Four experiments are reported that address the question how we detect a face. Experiment 1 reveals that we use information from the scene to aid detection. In experiment 2 we investigated which features...

In this commentary, I discuss each of the seven articles included in this special issue, which, as a collection, honor the impact of Howard Barrows’ vision on the scholarship and practice of problem-based learning (PBL). Collectively, these articles represent a variety of contexts, content areas, delivery formats, and structures in PBL implementations and research. Each article is examined and ...

Spatial smoothness is helpful when averaging fMRI signals across multiple subjects, as it allows different subjects' corresponding brain areas to be pooled together even if they are slightly misaligned. However, smoothing is usually not applied when performing multivoxel pattern-based analyses (MVPA), as it runs the risk of blurring away the information that fine-grained spatial patterns contai...