I Wonder Who : Has Taken My Place With You

https://digitalcommons.library.umaine.edu/mmb-vp/3903/thumbnail.jp

P1_6 Moon Shoes on the Moon

Moon shoes are a children's toy described as 'mini trampolines for your feet'. By assuming that the rubber bands in these shoes obey Hooke's law, we have investigated how these shoes would work when used on the moon and compared this to how they work on Earth. We found that if the bands were stretched by just 0.04m, an astronaut on the moon could bounce up to 14.7

Hybrid Manufacturing: Integrating Direct Write and Stereolithography

A commercial stereolithography (SL) machine was modified to integrate fluid dispensing or direct-write (DW) technology with SL in an integrated manufacturing environment for automated and efficient hybrid manufacturing of complex electrical devices, combining threedimensional (3D) electrical circuitry with SL-manufactured parts. The modified SL system operates similarly to a commercially available machine, although build interrupts were used to stop and start the SL build while depositing fluid using the DW system. An additional linear encoder was attached to the SL platform z-stage and used to maintain accurate part registration during the SL and DW build processes. Individual STL files were required as part of the manufacturing process plan. The DW system employed a three-axis translation mechanism that was integrated with the commercial SL machine. Registration between the SL part, SL laser and the DW nozzle was maintained through the use of 0.025-inch diameter cylindrical reference holes manufactured in the part during SL. After depositing conductive ink using DW, the SL laser was commanded to trace the profile until the ink was cured. The current system allows for easy exchange between SL and DW in order to manufacture fully functional 3D electrical circuits and structures in a semi-automated environment. To demonstrate the manufacturing capabilities, the hybrid SL/DW setup was used to make a simple multi-layer SL part with embedded circuitry. This hybrid system is not intended to function as a commercial system, it is intended for experimental demonstration only. This hybrid SL/DW system has the potential for manufacturing fully functional electromechanical devices that are more compact, less expensive, and more reliable than their conventional predecessors, and work is ongoing in order to fully automate the current system.Mechanical Engineerin

P1_2 Freezing the Oceans

We modelled the Earth's oceans as a series of concentric shells of water. By nding the freezingtemperature of saline water at each depth, we found the energy change required to reduce the tem-perature of each shell to freezing point. By including the energy change needed to cause a changein state, we found that the total energy change required to freeze the oceans is approximately7.0 X10^23kJ

P1_5 I Would Walk 500 More

In the paper 'P1 3 I Would Walk 500 Miles' [1] the reduction in body mass of the average Scottish male, or 'Proclaimer', was considered as a relation to distance walked. It was further proposed that a model could be formed in which the Proclaimers' energy is drawn from some carried mass of food, rather than its own body fat. In this paper we consider the relation between body mass and the necessary carried mass of food for a Proclaimer to walk, with negligible mass reduction, over fixed distances. It was found that the mass a Proclaimer must carry is directly proportional to the Proclaimers' body mass. It was also found that the initial carried mass increases exponentially over journey length. It is therefore not feasible for the Proclaimer to carry its own food over the full 1000 miles

If I Only Had You Back Again

No cover arthttps://scholarsjunction.msstate.edu/cht-sheet-music/9333/thumbnail.jp

Dark Energy and Modified Gravity

Despite two decades of tremendous experimental and theoretical progress, the riddle of the accelerated expansion of the Universe remains to be solved. On the experimental side, our understanding of the possibilities and limitations of the major dark energy probes has evolved; here we summarize the major probes and their crucial challenges. On the theoretical side, the taxonomy of explanations for the accelerated expansion rate is better understood, providing clear guidance to the relevant observables. We argue that: i) improving statistical precision and systematic control by taking more data, supporting research efforts to address crucial challenges for each probe, using complementary methods, and relying on cross-correlations is well motivated; ii) blinding of analyses is difficult but ever more important; iii) studies of dark energy and modified gravity are related; and iv) it is crucial that R&D for a vibrant dark energy program in the 2030s be started now by supporting studies and technical R&D that will allow embryonic proposals to mature. Understanding dark energy, arguably the biggest unsolved mystery in both fundamental particle physics and cosmology, will remain one of the focal points of cosmology in the forthcoming decade.Comment: 5 pages + references; science white paper submitted to the Astro2020 decadal surve