A high strain rate tensile testing technique for sheet materials is presented which makes use of a split Hopkinson pressure bar system in conjunction with a load inversion device. With compressive loads applied to its boundaries, the load inversion device introduces tension into a sheet specimen. Two output bars are used to minimize the effect of bending waves on the output force measurement. A...

This article presents the investigative work conducted on the fracture toughness and microstructure of Al6061-9% graphite particulate composites. The requisite specimens for the fracture toughness testing were compact tension ones prepared using stir casting technique. The Al6061-9% graphite particulate metal matrix composite has been heat treated in the underaged condition. It is observed from...

Metal nanolaminate coatings are introduced as a new approach in post-weld treatment methods. A Cu/Ni coating is electrodeposited from single citrate bath onto butt-welded tension-tension fatigue specimen. The consists of Ni base layer and 160 alternating Cu layers. specimen tested with stress range close to the yield strength This first study reveals surprisingly high lifetime extensions welded...

Migration of extravillous trophoblasts (EVT) into decidua and myometrium is a critical process in the conversion of maternal spiral arterioles and establishing placenta perfusion. EVT migration is affected by cell-to-cell communication and oxygen tension. While the release of exosomes from placental cells has been identified as a significant pathway in materno-fetal communication, the role of p...

An element test specimen with ply drops, intended to be representative of a composite structure varying thickness such as the main laminate in wind turbine rotor blade structure, is used investigate fatigue damage initiating from drop under cyclic tension–tension loading. The focus measure growth rate delamination cracks propagating thin towards thicker section. Several delaminations initiate t...

High performance fiber reinforced cement-based composite (HPFRCC) materials have unique properties that are advantageous for many structural applications. In direct tension these materials can reach strains between 0.5% and 6% depending on material and specimen geometry. The large tensile strain capacity allows these materials to strain compatibly with steel reinforcement and achieve higher ten...

Advanced applications of materials need sophisticated measurement methods for research, process development and quality control. X-ray Computed Tomography (CT) is a very powerful method for non-destructive testing of materials. A CT-scanner generates a series of X-ray attenuation measurements, which are used to produce computed reconstructed images of an object. In the last years 3D-CT systems ...

Background: F-FDG PET/CT imaging is widely utilized in the clinical evaluation of patients with suspected or documented lymphoma. The aim was to describe our cumulative experience with a multimodal F-FDG-directed lymph node surgical excisional biopsy approach in patients with suspected lymphoma. Methods: Thirteen patients (mean age 51 (±16;22–76) years), with suspected new or suspected recurren...

BACKGROUND To report a case of fatal tension pneumocephalus in a 9-year-old boy following a severe motor vehicle accident. METHODS A young boy with a serious closed head injury was resuscitated in the emergency room and underwent CT scan of the head and orbits. RESULTS The CT-scan revealed a fracture of the orbital roof with extensive bilateral pneumocephalus. CONCLUSIONS A high index of ...

Tension lag time on electric stimulation (TLTe), i.e., latency from the stimulus to the rise of tension, and contraction time (CT) of the rectus femoris muscle on twitch contraction were measured on the affected and non-affected sides of eight patients with spastic hemiparesis due to stroke. Both TLTe and CT were significantly longer on the affected side than on the non-affected side, suggestin...