Does holding schools accountable for student performance cause good teachers to leave low-performing schools? Using data from New York City, which assigns accountability grades to schools based on student achievement, I perform a regression discontinuity analysis and find evidence of the...

Does holding schools accountable for student performance cause good teachers to leave low-performing schools? Using data from New York City, which assigns accountability grades to schools based on student achievement, I perform a regression discontinuity analysis and find evidence of the...

Does holding schools accountable for student performance cause good teachers to leave low-performing schools? Using data from New York City, which assigns accountability grades to schools based on student achievement, I perform a regression discontinuity analysis and find evidence of the...

Strong motivation exists within the marine sector to reduce fuel expenses and to comply with ever stricter emission regulations. Heat recovery can address both of these issues. The ORC (organic Rankine cycle), the Kalina cycle and the steam Rankine cycle have received the majority of the focus...

Today, most merchant vessels use Heavy Fuel Oils (HFOs) for ship propulsion. These fuels are cost effective but they produce significant amounts of noxious emissions. In order to comply with International Maritime Organization (IMO) rules, Liquefied Natural Gas (LNG) is becoming an interesting...

For application of kites to ships for power and propulsion, a scheme for predicting time averaged kite forces is required. This paper presents a method for parameterizing figure of eight shape kite trajectories and for predicting kite velocity, force and other performance characteristics....

Evidence has been accumulating from theoretical and model test studies over several years that propellers that could be designated as “oscillating foil” are potentially more energy efficient than conventional screw propellers (Lai, 1990). There has also been demonstrations that, in the...