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Ivan Sutherland's Sketchpad is one of the most influential computer programs ever written by an individual, as recognized in his citation for the Tur-ing award in 1988. The Sketchpad program itself had limited distribution — executable versions were limited to a customized machine at the MIT Lincoln Laboratory — so its influence has been via the ideas that(More)
s Advanced Technology Group provided a supportive and productive environment during the summer of 1992, enabling me to undertake this analysis along with other concomitant activities. Parts of this research were also funded by the UK SERC/ESRC/MRC Joint Council Initiative on Cognitive Science and Human Computer Interaction, and by the Commission of the(More)
This study investigates Information Systems (IS) personnel turnover in South Africa. The results indicate that there is significant positive correlation between job satisfaction, career satisfaction and organisational commitment, whereby individuals experiencing job satisfaction are more likely to be committed to their organisation and experience career(More)
s Advanced Technology Group provided a supportive and productive environment during the summer of 1992, enabling me to undertake this analysis along with other concomitant activities. Parts of University) provided valuable comments on several drafts of this paper. Abstract As part of a series of investigations on the nature of programming and debugging(More)
OBJECTIVES Determine the real-world difference between 2 groups of patients with severe aortic stenosis and similar baseline comorbidities: surgical turn down (STD) patients, who were managed medically prior to the availability of transcatheter aortic valve implantation (TAVI) following formal surgical outpatient assessment, and patients managed with a TAVI(More)
BACKGROUND Primary percutaneous intervention (PPCI) is the treatment of choice for ST elevation myocardial infarction (STEMI) but robust evidence in the very elderly is lacking. We compared PPCI outcomes between different age quartiles (quartile 1 < 60 years, quartile 2 ≥ 60 to < 70 years, quartile 3 ≥ 70 to < 80 years, quartile 4 ≥ 80 years). METHODS(More)
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