The sun's total irradiance decreased from 1980 to mid-1985, remained approximately constant until mid-1987, and has recently begun to increase. This time interval covered the decrease in solar activity from the maximum of solar cycle 21 to solar minimum and the onset of cycle 22. The sun's ultraviolet irradiance also decreased during the descending phase of cycle 21 and, like the total irradian...

Across the country's four largest states, uninsured rates vary for adults ages 19 to 64: 12 percent of New Yorkers, 17 percent of Californians, 21 percent of Floridians, and 30 percent of Texans lacked health coverage in 2014. Differences also extend to the proportion of residents reporting problems getting needed care because of cost, which was significantly lower in New York and California co...

Occupational skin disorders, in particular inflammations, dryness and erythema, in 80% of cases affect the skin of hands. The most frequent diagnosis, in over 90% of cases of occupational skin diseases, points to an irritant or allergic contact dermatitis. Our aim was to study the prevalence of self-reported skin symptoms on hands and forearms in different populations. The study was conducted o...

The possible contribution of computed tomography (CT) in the management of patients with solitary pulmonary nodules (SPNs) or masses was reviewed retrospectively in 65 patients undergoing fiberoptic bronchoscopy (FOB). Nodules were evaluated by size, location, surface contour, and the presence in cross-section of a bronchus leading to or contained within the nodule or mass, a "positive bronchus...

Constant temperature and replica-exchange molecular dynamics simulations of two Aβ21-30 decapeptides in explicit solvent reveal metastable dimer states that are abundant near physiological temperatures. As Alzheimer's disease is associated with the neurotoxic oligomers of amyloid β-protein, the formation of these dimers provides insight into oligomer assembly.

We performed a randomized trial comparing two dosing regimens of recombinant tissue plasminogen activator (rt-PA) plus heparin vs heparin alone in the treatment of acute proximal deep vein thrombosis in 83 patients. Of 12 patients who received 0.5 mg/kg rt-PA plus heparin over 4 h, seven (58 percent) had greater than 50 percent lysis of the thrombus, compared with none of 12 who received placeb...

Pulmonary arterial pressure-flow relation was studied in 142 patients with artrial septal defect (ASD) and was compared with that of 139 patients with ventricular septal defect (VSD) and was compared with that of ductus arteriosus (PDA). The incidence of pulmonary arterial mean pressure (PAm) over 25 mmHg was 21 percent in ASD, 36 percent in VSD and 43 percent in PDA, and that over 40 mmHg was ...

The 1990s saw the emergence of managed care into the Medicare marketplace. In the beginning of the decade nearly all beneficiaries were in the Medicare fee-forservice (FFS) program. In 1991 there were only 1 million Medicare risk health maintenance organization (HMO) members accounting for a little over 3 percent of the Medicare population. By 1999 there were over 6 million Medicare risk HMO me...