Line Current Commutated (LCC) HVDC systems consists of uncertain plants. These uncertainties are result of changes/disturbances in the ac networks or in the LCC HVDC system itself. Further uncertainties can be introduced due to simplified system modelling techniques. Quantitative Feedback Theory is a frequency-domain technique that utilises the Nichols chart to achieve a robust design over a sp...

Analysts are constantly overwhelmed by large amounts of data which lack meaningful or useful structure. LCC is working on two tools which help to alleviate this problem, Jaguar and Po-laris. The technical contributions of each of these tools, namely automatic extraction of semantic relations, automatic ontology construction , and metrics to evaluate ontology quality, as well as experimental res...

Prostate cancer and prostatic calcifications have a high incidence in elderly men. We aimed to investigate the diagnostic capabilities of susceptibility-weighted imaging in detecting prostate cancer and prostatic calcifications. A total number of 156 men, including 34 with prostate cancer and 122 with benign prostate were enrolled in this study. Computed tomography, conventional magnetic resona...

BACKGROUND Digital mammography is the most reliable imaging modality for breast carcinoma diagnosis and breast micro-calcifications is regarded as one of the most important signs on imaging diagnosis. In this paper, a computer-aided diagnosis (CAD) system is presented for breast micro-calcifications based on dual-tree complex wavelet transform (DT-CWT) to facilitate radiologists like double rea...

During the past 15 to 20 years the detection in vivo of intracardiac calcifications and their identification has become a fairly common accomplishment in the hands of careful, painstaking roentgenologists. No individual has contributed more toward stimulating his confreres in detecting these lesions than has Merrill Sosman, of B o ~ t o n . ~ # ~ . l ~ Among technical advances which have greatl...

BACKGROUND AND PURPOSE Nonlacunar cerebral infarcts are presumed to be caused by thromboembolism from the heart or extracranial arteries, whereas lacunar infarcts are thought to be caused by small vessel disease. We investigated to what extent arterial calcifications differ between nonlacunar and lacunar ischemic strokes. METHODS We studied 820 consecutive patients with transient ischemic att...

BACKGROUND Dystrophic calcifications may occur in patients with J uvenile Idiopathic Inflammatory Myopathy (JIIM) as well as other connective tissue and metabolic diseases, but a reliable method of measuring the volume of these calcifications has not been established. The purpose of this study is to determine the feasibility of low dose, limited slice, Computed Tomography (CT) to measure object...

BACKGROUND To establish an efficient prophylaxis of coronary artery disease reliable risk stratification is crucial, especially in the high risk population of patients suffering from diabetes mellitus. This prospective study determined the predictive value of coronary calcifications for future cardiovascular events in asymptomatic patients with diabetes mellitus. METHODS We included 716 patie...