Roller skis are used by cross-country skiers for snow-free training, with the aim of imitating skiing on snow. The roller skis on the market that are constructed for use in the classical style are equipped with a front and a back wheel, one of which has a ratchet to enable it to grip the surface when diagonal striding and kick double poling. A new type of roller ski was constructed with a funct...

Complex and time-critical process chains in industrial production of premium automobiles demand a sophisticated supply chain management and logistics as well as safe and reliable transport systems. Inside a vast factory individual parts (e.g. engines) cover large distances by using electric monorail suspension conveyers. In such an environment, the avoidance of any collision of units with the s...

compared to other methods of vaccine production, (e.g. culture flask and bioreactor system), the roller culture method for producing rabies vaccine is simpler, and the equipment easier to install and maintain, and also in the event of contamination of one roller, the entire batch need not be discarded. this system provides a much larger surface area than the culture flask, and also ensures a mu...

Rollers crimpers have been used in conservation agriculture to terminate cover crops; however, excessive vibration generated by the original straight-bar roller design has delayed adoption of this technology in the United States. To avoid excessive vibration, producers generally reduce operating speeds that increase the time needed to perform the field operation. The objectives of this research...

OBJECTIVE To describe the circumstances, severity, and outcomes of skating-related injuries among children admitted to trauma centers. DESIGN A cross-sectional comparison of roller skaters (n = 154), in-line skaters (n = 190), and skateboarders (n = 254) aged 5 to 19 years who were hospitalized with injuries. SETTING Seventy-nine hospitals and pediatric trauma centers participating in the N...

[Purpose] The purpose of this study is to examine the influence of the vibration form-roller exercise on the pain in the hip joint and the joint performances. [Subjects and Methods] 30 adult patients were randomly sampled and divided into form-roller group (15) and the vibration form-roller group (15). The two groups were exposed to an exercise regimen of 3 sessions per week, over 4 weeks. Each...

Objective.-To describe circumstances, severity, and outcomes of skating-related injuries among children admitted to trauma centers. Design.-Cross-sectional comparison of roller skaters (N = 154), inline skaters (N = 190), and skateboarders (N = 254) age 5 to 19 who were hospitalized for their injuries. Setting.-79 hospitals and pediatric trauma centers participating in the National Pediatric Tr...

A prototype of a non-occlusive pressure-regulated blood pump (M-pump) was evaluated in-vitro for safety in a comparative study with the roller and centrifugal pumps. The M-pump consists of collapsible tubing of unique design wrapped under tension around a rotor without a stator. The prototype M-pumps were tested in vitro to evaluate performance with respect to flow/ pressure characteristics, he...

The main testing parameter of the roller brake tester is the braking force. Actually, there are some differences in results even if the same vehicle is tested on the same tester. So it will bring trouble to evaluate the braking performance accurately. Based on force analysis, the mathematical model of the roller opposite force type automobile brake tester is built in this article. And then the ...