American elections are conducted using a hodge-podge of different voting technologies: paper ballots, lever machines, punch cards, optically scanned ballots, and electronic machines. And the technologies we use change frequently. Over the last two decades, counties have moved away from paper ballots and lever machines and toward optically scanned ballots and electronic machines. The changes hav...

I N this article we discuss briefly the evalua­ tion of the intensity and radial distribution functions which are involved in the determina­ tion of the structures of gas molecules by the electron diffraction method.1 Heretofore, these calculations were by far the most time-consuming part of the entire investigation; however, with International Business Machines Corporation equipment and the pu...

cerebral trauma. While in the hospital, he passed tarry stool and developed anemia. He then suddenly had severe hemorrhage andwent into shock. Emergent upper gastrointestinal tract endoscopy revealed several shallow, geographical ulcers with coagula in the second and third parts of the duodenum (●" Fig. 1). One of the ulcers had an exposed vessel that was bleeding heavily (●" Fig. 2). We stoppe...

PURPOSE This study assessed the association between eye symptoms (enophthalmos or diplopia) and site of damage, volume, deviated inferior rectus muscle (IRM) and type of fracture with computed tomography (CT). The intent is to anticipate the prognosis of orbital trauma at initial diagnosis. METHODS Forty-five patients were diagnosed with fractures of the inferior wall of one orbit. Fracture a...

Air filters support fungal growth, leading to generation of conidia and volatile organic compounds, causing allergies, infections and food spoilage. Filters that inhibit fungi are therefore necessary. Zinc oxide (ZnO) nanoparticles have anti-fungal properties and therefore are good candidates for inhibiting growth. Two concentrations (0.012 M and 0.12 M) were used to coat two types of filters (...

Figures 1. a) WALTER (circa 1965) was a teleoperated anthropomorphic robot constructed as a high-school science-fair entry; b) WALTER's grippers, elbows, and shoulder joints were tendon-actuated. 7. This actual punched card used on CRAWLER I shows the two rows of holes representing input and output data. The sketch on the back is a preliminary gripper design (for CRAWLER II) that was abandoned ...