Theory and experiment on the London moment is reviewed. A simple mathematical model is motivated and then used to study the responses of a spherical superconductor to an external field and to rotation. It reveals a connection between perfect diamagnetism (Meissner effect) and the London moment. In the model neither of these are exact but the deviation from B = 0 internal field in the former and...

Interruption interference is a significant decrease in performance that follows task interruption. This interference is often studied using a primary and interrupting task pair. Evidence suggests that interruption interference can be reduced through practice by exposing individuals to many interruptions. However, the evidence that this skill transfers beyond the tasks being trained is less clea...

Design of a natural dry cooling tower has been accomplished in two sections: the design of heat exchangers and the numerical solution of flow through the tower. Heat exchanger (Heller type) has been simulated thermodynamically and then coupled with a computer program, which calculated the turbulent natural convection flow through the tower. The computer program developed for this purpose can be...

Wind affects adversely the cooling tower thermal performance. A field investigation was carried out to study the thermal performance of Heller cooling towers under wind conditions, involving measurement of wind velocity and its direction around the cooling tower, and obtaining water flow rates and temperatures at the cooling tower inlet and outlet. Results show that air suction at the tower top...

Background. Ceftolozane/tazobactam (TOL/TAZ) is a novel antibacterial with activity against P. aeruginosa (PSA) and other common Gram-negative pathogens (GN). TOL/TAZ is currently under clinical development for the treatment of nosocomial pneumonia, complicated intra-abdominal infections and complicated UTIs. The in vitro activity of TOL/TAZ was tested against GN in patients hospitalized with p...

In a steam power plant, the temperature of the cooling water leaving the condenser for recyclingshould decrease. This is achieved in a cooling tower. The Heller cooling tower does not require waterfor operation, thus, it is a suitable system for use in thermal power plants throughout Iran. Wind is anenvironmental factor that unfavorably affects the performance of a cooling tower. Previous studi...

introduction executive function define as ability to maintain a suitable and gool directed condition for problem solving. the results of previous studies on tourette syndrome (ts) were contradiction, but the impairment of visual-spatial performance, working memory and reaction time were shown. in children with attention defiat hyperactivity disorder (adhd) impairment of set shifting, motor inhi...