Measurements of the flow field around a low pressure turbine blade are presented. The purpose of the experimental study is to investigate the detailed transition and separation characteristics on low pressure turbine blades. The present study focuses on the effect of Reynolds number on the formation of separation bubbles on the turbine blade surface. Specific attention is paid to the flow withi...

Hydrogen peroxide (H2O2) can act as an intracellular messenger by oxidizing sulfhydryl groups in cysteines that can be oxidized at neutral pH. The oxidizing agents H2O2 and pyrroloquinoline quinone and the large thiol reagents N-ethylmaleimide and 4-(hydroxymercuri) benzoate each inhibited dipeptidyl peptidase (DP) activity in the intracellular DPIV-related proteins DP8 and DP9 at pH 7.5. In co...

As members of the derived teleost fish clade Scombridae, mackerel exhibit high-performance aquatic locomotion via oscillation of the homocercal forked caudal fin. We present the first quantitative flow visualization of the wake of a scombrid fish, chub mackerel Scomber japonicus (20-26 cm fork length, FL), swimming steadily in a recirculating flow tank at cruising speeds of 1.2 and 2.2FL s(-1)....

Since caldera collapse deformation is extremely difficult to study in real time - due the high rates that characterize this process and access structures-analogue modeling has been widely used during past decades integrate field data and, more recently, remote-sensing (e.g., InSAR). However, relationships between inherited discontinuities, such as crustal faults, remain poorly investigated. We ...

Cerebral aneurysms result from a complex interplay between mechanical stresses and pathophysiological changes occurring in the arterial wall. In order to reduce the hemodynamic forces acting on the aneurysmal wall, new endovascular treatments have been developed involving the exclusion of the aneurysm from the intracranial circulation. A comparative study of the performance of three of these te...

Swimming and flying animals generate unsteady locomotive forces by delivering net momentum into the fluid wake. Hence, swimming and flying forces can be quantified by measuring the momentum of animal wakes. A recently developed model provides an approach to empirically deduce swimming and flying forces based on the measurement of velocity and vortex added-mass in the animal wake. The model is c...

The evolution of starting jet circulation, impulse and kinetic energy are derived in terms of kinematics at the entrance boundary of a semi-infinite axisymmetric domain. This analysis is not limited to the case of parallel jet flows; and the effect of non-zero radial velocity is specifically identified. The pressure distribution along the entrance boundary is also derived as it is required for ...

The head of ray-finned fishes is structurally complex and is composed of numerous bony, muscular, and ligamentous elements capable of intricate movement. Nearly two centuries of research have been devoted to understanding the function of this cranial musculoskeletal system during prey capture in the dense and viscous aquatic medium. Most fishes generate some amount of inertial suction to captur...