OBJECTIVE This study aimed to determine if occupational exposure to whole-body vibration is associated with cervical intervertebral disc herniation among container truck drivers. METHODS We conducted a walk-through survey among container truck drivers and unexposed workers. We also measured the vibration hazard of the container truck over the driver's back and seat when the driver was loading...

The use of forklifts to move material is very common in large manufacturing companies. Exposure to whole body vibration from industrial vehicles such as forklifts has been associated with low back pain and also with the degeneration of intervertebral disc. Predicted health risks, associated with the operation of forklifts, based on ISO 2631-1 criteria are limited and have not yet been determine...

The story goes back to 1940, with the publication of Quine's Mathematical Logic [5]. He there presents a system of quantificational logic in which only sentences or closed formulas are theorems. In that system, the sole rule of inference is Modus Ponens and the axioms are the universal closures of the following formulas: (1) $, for @ tautologous; (2) Wvb) 1 vcwv~~); (3) qb 3 Vcuj, for o not fre...

We report on some recent progress in the classification of smooth projective varieties with small invariants. This progress is mainly due to the finer study of the adjunction mapping by Reider, Sommese and Van de Ven [So1], [VdV], [Rei], [SV]. Adjunction theory is a powerful tool for determining the type of a given variety. Classically, the adjunction process was introduced by Castelnuovo and E...

the purpose of this study was to assess exposure to hand-arm vibration in tiller users, forty users of tiller in northeastern provinces of iran were examined to measure hand-arm vibration parameters such as root mean square acceleration (rms), total equivalent acceleration, vibration dose value (vdv) and crest factor in three directions (x, y, and z) and various operating modes for comparing th...

Public transport faces a challenging period in which relevant operators invest in telematics systems in order to upgrade their internal operations and improve the services provided. Moreover, the public transport system has become quite dynamic during recent years, in the sense that the performance, effectiveness, and quality of its processes depend, to a large extent, on the factors affecting ...