This paper presents the preliminary systems design of a pole-sitter. This is a spacecraft that hovers over an Earth pole, creating a platform for full hemispheric observation of the polar regions, as well as direct-link telecommunications. To provide the necessary thrust, a hybrid propulsion system combines a solar sail with a more mature solar electric propulsion (SEP) thruster. Previous work ...

A Solar Sail Radiation Environment (SSRE) model has been developed for defining charged particle environments over an energy range from 0.01 keV to 1 MeV for hydrogen ions, helium ions, and electrons. The SSRE model provides the free field charged particle environment required for characterizing energy deposition per unit mass, charge deposition, and dose rate dependent conductivity processes r...

The use of fossil fuels on commercial ships significantly contributes to the increase carbon dioxide emission, and adaptation renewable energy can help control that emission efficiently. Historically, extraction wind is found be best solution for ships; recently, with renewed interest in this area, various devices are proposed literature. This study investigates effectiveness one such technolog...

writing is a skill many feel they lack, the question ‘How’s your writing?’ gets at one of the dark hearts of imposter syndrome among medical education researchers. And, let’s be frank, a lot of our scientific writing is terrible: dry, chalky, convoluted stuff that even an engaged reader struggles to choke down. We find ourselves in a troubling situation: one of our valued practices—writing—is h...

Brewing has a long history in this country—first making an appearance in 1620 with the landing of the Pilgrims at Plymouth Rock in Massachusetts. Today, beers can be easily categorized into one of two types: 1) industrial, and 2) craft. The focus of this paper is on this second type, the "craft beer" and the so-called "renaissance" it experienced during the 1980s. In 1983, there were only 43 op...

The shocks and impacts encountered on small high-speed craft exceed the limits set for safe working practice according to current standards. European legislation regarding the exposure to vibration will have far reaching effects on the operators of such craft with respect to the safety of their employees. This paper sets out to highlight the vibration dose values that can be expected during typ...

ACADIA 2007 The distinction between matter (mechanics) and information (electronics) in the context of responsive building skins has promoted unique design protocols for integrating sensor technologies into material components. Such a distinction results in applications of remote sensing after the process of material fabrication. Sensors are commonly perceived as electronic patches which initia...

Traditionally, programming languages have been designed with an eye toward implementation on general-purpose computers. The advent of computationally-enhanced craft items–small programmable objects with simple geometries and scaled-down computational components–suggests the need for new language and software environment models tailored for these objects. In some respects, the task of the craft-...