Impact of lunar oxygen production on direct manned Mars missions

A manned Mars program made up of six missions is evaluated to determine the impact of using lunar liquid oxygen (LOX) as a propellant. Two departure and return nodes, low Earth orbit and low lunar orbit, are considered, as well as two return vehicle configurations, a full 70,000-kg vehicle and a 6800-kg capsule. The cost of lunar LOX delivered to orbit is expressed as a ratio of Earth launch cost

The geology of the northeast quarter of the Powell, Ohio quadrangle

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Development consortium: HCI across borders

Though every country and context is unique, and much of HCI research aims to design for situatedness, there are lessons to be learned across borders, across contexts. Questions we ask include: What are common themes that tie together different contexts? For instance, could a maternal health project in India benefit from lessons learned from a project in Kenya and vice versa? How can we, as a global HCI4D community, work within countries and across them as well? The short-term goal of this event is to link research and practice across disparate HCI4D contexts by creating a forum for conversations where 'HCI4Ders' from across the globe can speak and be heard, as they develop themes of common interests, and work on potential projects or proposals to concretely target an action plan they can pursue as collaborators. Our longterm goal is to advance HCI4D research so that, as a community, we can engage more productively in research conversations that focus on learning and collaborating across borders

Use of Technology and Perceived Level of Engagement with 1:1 Technology

This quantitative dissertation was designed to describe to the policymakers and stakeholders of School District Z the frequency of use of the 1:1 technology, the frequency of use of other technological devices by teachers and students, and the importance of 1:1 technology to student learning. District Z provided Chromebooks to each student in Grades 6, 7, and 8 during the 2014-2015 school year with the goal of harnessing the power of technology to engage students and ultimately to improve student achievement. The researcher developed a survey instrument to capture data from approximately 1,100 students 1 year after implementation of the 1:1 Technology Initiative. The survey was administered to participating students through SurveyMonkey. No personally identifiable information was collected. An analysis of the data revealed that students self-reported daily use of computers and the majority of the students believed that access to computers was important to learning. When using computers, students used descriptions such as hardworking, interested, and engaged. These data suggested that the use of 1:1 technology can be a precursor to more student engagement and enhanced student achievement