This study aimed to evaluate and better understand the mechanical crystalline responses of polycrystalline silicon sawn by diamond wire sawing. To simplify multi-wire sawing kinematic, an endless saw with a single looped welded was used. The cutting speed feed rate were varied in order characteristics surface morphology, roughness, subsurface damage. analysis brittle-ductile transition residual...

OBJECTIVE Repetitive training of simple upper limb movements is effective in stroke rehabilitation. For the repetitive training of complex movements, however, results are inconsistent. The aim of this study was to determine whether repetitive training of complex upper limb movements, focussing on strength and velocity as shaping elements, is effective in stroke rehabilitation. DESIGN Longitud...

Case hardening is a feature of dried wood that causes the wood to deform (cup) after re-sawing and equalising the moisture content. VTT has analysed case hardening with the aid of the simulation model PEO and with experimental drying, conditioning and storage tests. Case hardening cannot be predicted by the moisture content gradient alone. However, the case hardening gap after drying to a high ...

Computerized grading of hardwood lumber according to NHLA rules would permit fast assessment of sawn lumber and the evaluation of potential edging and trimming operations to improve lumber value. More importantly, to enable optimization of the hardwood lumber sawing process, a fast means of evaluating the potential value of boards before they are sawn is necessary. As log and lumber scanning sy...

the conventional tunneling procedures for example drilling, charging, blasting, loading and supporting, are highly developed. new tunneling machines have recently come into operation and others are under construction or development. impactors are used in large numbers in the coal mining industry. face-heading machines are successfully used in new tunneling procedures in both soft and medium-har...