This paper investigates the noise radiated by a cascade of flat-plate airfoils interacting with homogeneous, isotropic turbulence. An analytic formulation for the spectrum of acoustic power of a two-dimensional flat-plate is derived. The main finding of this paper is that the acoustic power spectrum from the cascade of flat airfoils may be split into two distinct frequency regions of low freque...

Beyond the normal DNA transactions mediated by topoisomerase II, we have recently demonstrated that the cleavage activity of the two human topoisomerase II isoforms is several-fold stimulated if a ribonucleotide rather than a deoxyribonucleotide is present at the scissile phosphodiester in one strand of the substrate. Here we show that ribonucleotides exert a position-specific effect on topoiso...

A single-stage axial fan having a pressure ratio of 1.01 is designed in the current study. The design chosen based on power available from existing motor (2.2 kW). space for flow was generated by varying specific and geometrical parameters suitable steps, using program written MATLAB. varied are mass rate, inlet Mach number, angle, rotor speed. that were hub to tip ratio, aspect blade solidity....

Compressed air energy storage systems must promptly adapt to power network demand fluctuations, necessitating a high surge margin in the compression system ensure safety. It is challenging completely eliminate blade geometric variations caused by limited machining precision, important effects of which should be considered during aerodynamic shape design and production inspection. The present pa...

A variety of methods have been developed for cloning PCR products, including blunt-end cloning (1), restriction cut back (2), ligation-independent cloning (3), uracil DNA–glycosylase (UDG) treatment of uracil-containing deoxyoligonucleotide primers (4,5) and TA cloning (6–8). Blunt-end cloning of PCR products often requires treatment of PCR products to polish the ends (9). Even with treatments,...

We describe a method for the induction of different polymorphic forms of actin filament paracrystals. This polymorphism is probably based on differences in the stagger and/or polarity of adjacent filaments in single-layered paracrystals and by superposition of different layers in multilayered paracrystals. The helical parameters defining the filament geometry are indistinguishable for the diffe...

A consistent checkpointing algorithm saves a consistent view of a distributed application's state on stable storage. The traditional consistent checkpointing algorithms require diierent processes to save their state at about the same time. This causes contention for the stable storage, potentially resulting in large overheads. Staggering the checkpoints taken by various processes can reduce che...

A consistent checkpointing algorithm saves a consistent view of a distributed application's state on stable storage. The traditional consistent checkpoint-ing algorithms require diierent processes to save their state at about the same time. This causes contention for the stable storage, potentially resulting in large overheads. Staggering the checkpoints taken by various processes can reduce ch...