Body reactions during chain saw work were studied in 14 subjects. The subjects divided into three groups (control, sulpiride, and propranolol) successively cut down logs with a chain saw for seven minutes. The start of the sawing led to a pronounced increase in heart rate which persisted during the sawing. The groups taking sulpiride and propranolol showed a smaller increase in heart rate compa...

The most common adverse effect after bone cutting is a thermal damage. The aim of our study was to evaluate the bone temperature rise during an alveolar ridge splitting, rating the time needed to perform this procedure and the time to raise the temperature of a bone by 10°C, as well as to evaluate the bone carbonization occurrence. The research included 60 mandibles (n = 60) of adult pigs, divi...

OBJECTIVE To assess the clinical relevance of mean and minimum femorotibial joint space narrowing (JSN) for predicting future osteoarthritis related surgery in patients with knee osteoarthritis. METHODS 126 subjects with primary knee osteoarthritis were followed prospectively for a mean eight years. Minimum and mean joint space width (JSW) were assessed from standard x rays at baseline and af...

A rapid particle concentration method in a sessile droplet has been developed using asymmetric surface acoustic wave (SAW) propagation on a substrate upon which the droplet is placed. The SAW device consisted of a 0.75-mm thick, 127.68 YXaxis-rotated cut LiNbO3 as a substrate. An interdigital transducer electrode (IDT) with 25 straight finger pairs in a simple repeating pattern, 12 mm aperture,...

Merchant ships are generally built by joining steels with various welding methods. When the methods used in shipyards examined, it is seen that gas metal arc (GMAW), submerged (SAW), covered electrode and tungsten inert (TIG) come to fore. In assembly of ship hull sheets, GMAW SAW preferred. this sense, extremely important characterize mechanical properties weld zone after shipbuilding steel jo...

The metatarsophalangeal joint (MPJ) is a significant absorber of energy in sprinting. This study examined the influence of MPJ axis choice and filter cut-off frequency on kinetic variables describing MPJ function during accelerated sprinting. Eight trained sprinters performed maximal sprints along a runway. Three-dimensional high-speed (1000 Hz) kinematic and kinetic data were collected at the ...

Surgical reattachment of medial meniscus posterior root tear (MMPRT) with transtibial sutures can delay the presenceof medial knee joint compartment osteoarthritis. Most suture configurations are placed five mm away from the tornmargin in the meniscal substance which is already degenerated and may decrease the pull out strengths of repairconstruct. The number of meniscus penet...

Chain saws were first used in Kyusyu in 1956 for cutting down trees and sawing timber in the national forests. In 1961, some workers complained of symptoms due to the vibrations, but countermeasures were not taken until later. The working system and payment system in those times were different from the systems, today. The magnitudes of the chain saw vibrations were very large and the chain saws...