A large number of takeoff tests have been made on a Comet aircraft with the object of (a) acquiring comprehensive data on undirected takeoffs ; (b) testing a SCAT takeoff director. SCAT is explained in detail and the aircraft installation and test method described. Tests to determine ground effect on lift and on the SCAT Lift Transducer are also described. Undirected and directed takeoffs are c...

A study was conducted to compare responses of male and female Aedes aegypti (Linn.) and Aedes taeniorhynchus (Wiedemann) to 9 olfactory repellents in the World Health Organization insecticide irritability test system. An irritant insecticide (permethrin) and a control were included for comparison. Aedes aegypti exhibited significantly more takeoffs than Ae. taeniorhynchus, and female mosquitoes...

Paper presents a Geographic Information System (GIS) based quantity takeoffs methodology, which is helpful in increasing the productivity of quantity estimator by reducing the manual work in quantity takeoffs. Proposed methodology also reduces the missing or duplication of various items of work by visualizing each components corresponding to the items in space. Several scripts developed within ...

engine and airframe manufacturers for decades have cited the direct relationship between engine wear and high exhaust gas temperature (EGT) in recommending that operators use less than maximum takeoff thrust whenever possible. While the cost benefits of reduced-thrust takeoffs are thoroughly documented, the safety benefits are not as well understood. Thus, there is a common perception that usin...

Dragonflies are four-winged insects that have the ability to control aerodynamic performance by modulating the phase lag (phi) between forewings and hindwings. We film the wing motion of a tethered dragonfly and compute the aerodynamic force and power as a function of the phase. We find that the out-of-phase motion as seen in steady hovering uses nearly minimal power to generate the required fo...

Electronic bid documents are available from a variety of sources. Historically, contractors have printed the electronic documents and then performed their takeoffs. Takeoff viewers are now available that allow the contractor to perform their takeoffs directly from the electronic documents. Several software companies that produce takeoff viewers are listed and features of takeoff viewers are des...

This paper presents a Geographic Information System (GIS) based cost estimation methodology, which may be helpful in increasing the productivity of quantity estimator by reducing the manual work in quantity takeoffs. Proposed methodology also eliminates missing or duplication of various items of work by visualizing each components corresponding to the items in three dimension (3D). Several scri...

We find that a cross-country model of economic growth successfully tracks the growth takeoffs in China and India. The major drivers of the predicted takeoffs are improved health, increased openness to trade, and a rising labor force-to-population ratio due to fertility decline. We also explore the effect of the reallocation of labor from low-productivity agriculture to the higher-productivity i...