In a geometric context, two objects are “visible” to each other if there is a line segment connecting them that does not cross any obstacles. Over 500 papers have been published on aspects of visibility in computational geometry in the last 40 years. The research can be broadly classified as primarily focused on combinatorial issues, or primarily focused on algorithms. We partition the combinat...

Bronchiolitis, a disease primarily of the first 2 years of life charac­ terized by signs and symptoms of obstructive airway disease, is caused most commonly by viruses. Approximately 2% to 3% of infants in the first 12 months of life are hospitalized with bron­ chiolitis, accounting for approximately 125,000 hospitalizations and 200 to 500 deaths annually in the United States. Data from the Cen...

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Glucose-6-phosphate dehydrogenase (G6PDH, EC 1.1.1.49) from Leuconostoc pseudomesenteroides (the previously named: Leuconostoc mesenteroides) catalyzes the oxidation of glucose-6-phosphate in the presence of the coenzyme NADP or NAD. The enzyme is one of the industrially important enzymes and is applied in clinical settings. It is mainly useful in determinations of glucose and creatine kinase b...