To reproduce, females of the parasitoid fly Ormia ochracea detect and localise a calling male cricket upon which they deposit their endoparasitic larvae. Calling male crickets are therefore subject to both sexual and natural selection by simultaneously attracting mates and phonotactic parasitoids. The possible strategy of song interruption employed by the cricket host to reduce his attractivene...

This paper describes research on 3D formation ight using carrier-di erential GPS sensors. Although absolute position at the centimeter level is generally not possible in real-time, relative position between vehicles within the formation can be obtained at these levels of accuracy using carrier phase di erencing. However, several challenges exist before these measurements can be used in the form...

Three neonicotinoids, imidacloprid, clothianidin and thiacloprid, agonists of the nicotinic acetylcholine receptor in the central brain of insects, were applied at non-lethal doses in order to test their effects on honeybee navigation. A catch-and-release experimental design was applied in which feeder trained bees were caught when arriving at the feeder, treated with one of the neonicotinoids,...

Time-of-Flight (ToF) cameras gain depth information by emitting amplitude-modulated near-infrared light and measuring the phase shift between the emitted and the reflected signal. The phase shift is proportional to the object’s distance modulo the wavelength of the modulation frequency. This results in a distance ambiguity. Distances larger than the wavelength are wrapped into the sensor’s non-...

The results of the precursor flight of the AMS experiment are reviewed, the interpretation of the measured proton flux reported, and the prospects for the forthcoming main phase on the International Space Station outlined.

taking off in low cloud ceilings. When flying IFR, pilots rely on navigation instruments in conjunction with instructions from air traffic control agencies issuing clearances for routes and altitudes. In congested areas, air traffic controllers essentially “steer” aircraft using radar vectoring. To ensure an orderly flow of traffic, most phases of flight must follow a track, or flight path, tha...

Nowadays, in-flight comfort has become an essential characteristic to survive in domestic airline businesses. Air hostesses’ quality of service and response time to customer demand plays a vital role in enhancing quality of the flight experience and passenger satisfaction. However, additional requirements on air hostess expose them to fatigue which could eventually result in job dissatisfac...

T he business environment is characterized by environmental and exogenous factors that affect company performance to the extent that it prevents managers from interacting effectively with a company. This study built on the literature on the ease of doing business and capital flight by empirically demonstrating the importance of business environments across different countries. To thi...

– A flight path rate demand modified two-loop lateral missile autopilot design methodology for a class of rear controlled guided missile, based on state feedback, output feedback, reduced order Das & Ghosal observer (DGO) and PI controller is proposed. The open loop undamped model of two-loop autopilot has been stabilized by using pole placement and state feedback. The non-minimum phase feature...

Measuring the costs of soaring, gliding and flapping flight in raptors is challenging, but essential for understanding their ecology. Among raptors, vultures are scavengers that have evolved highly efficient soaring-gliding flight techniques to minimize energy costs to find unpredictable food resources. Using electrocardiogram, GPS and accelerometer bio-loggers, we report the heart rate (HR) of...