134 research outputs found

    A consumer-grade wearable technology is valid for the assessment of walking gait “in the wild”

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    Support vector machines can classify runner’s ability using wearable sensor data from a variety of anatomical locations

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    We developed and tested an algorithm to automatically classify twenty runners as novice or experienced based on their technique. Linear accelerations and angular velocities collected from six common wearable sensor locations were used to train support vector machine classifiers. The model using input data from all six sensors achieved a classification accuracy of 98.5% (10 km/h running). The classification performance of models based on single sensor data showed a 56.3-94.5% accuracy range, with sensors from the upper body giving the best results. Comparisons of kinematic variables between the two populations confirmed significant differences in upper body biomechanics throughout the stride, thus showing applied potential when aiming to compare novice runner’s technique with movement patterns more akin to those with greater experience

    P2_7 Outrunning Climate Change

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    In this paper we investigate the rate at which you would have to move Earth away from the Sun to combat the global temperature increase due to greenhouse gas emissions. By assuming the average global temperature increases linearly between 0.2 â—¦C or 4.8 â—¦C by the year 2100, we found that the Earth would need to be moved between 5.44 Ă— 106 and 1.31 Ă— 108 meters per year

    P2_9 Feasibility of Outrunning Climate Change

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    In this paper we investigate the feasibility of moving the Earth away from the Sun to combat climate change. We found that the energy needed to move the Earth 5.44 Ă— 106 m is 8.71 Ă— 1030 J per year for the lower bound and 5.29 Ă— 1033 J to move it 1.31 Ă— 108 J for the upper bound. For the lower bound, the number of rockets required to generate this energy is 1.21 Ă— 1030 and would cost 4.97Ă—1039USD.Fortheupperbound,1.77Ă—1034rocketswouldbeneeded,costing4.97 Ă— 1039 USD. For the upper bound, 1.77 Ă— 1034 rockets would be needed, costing 7.26 Ă— 1043 USD. We conclude that this is not a feasible method for combating climate change as using renewable energy sources to power the entire planet would be much more cost effective

    P2_10 Toasty Candles

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    The majority of houses use gas boilers to heat them up. This paper looks into an alternative method of heating up one room in a house. This paper investigates how many tea light candles it would take to heat up an empty room with a volume of 63.2 m3 by 5◦C as a potential alternative. We found that the total number of lit tea light candles it would take to achieve this in 15 minutes was 5 in a 100% insulated room.

    P2_3 Balloon Ovens

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    In this paper we investigate the amount of energy which can be extracted from a balloon which has built up charge due to the Contact Electrification. We then investigate the possibility of using charged balloons to generate enough electricity to cook a whole chicken. We found that 3.0 Ă— 1010 balloons would be needed to cook the chicken so it would be safe for consumption. We conclude that the electricity generated from electrically charged balloons likely has no practical application

    P2_2 Big Ben 2: Enormous Benjamin

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    The time-keeping ability of an analogue clock in the modern age relies heavily on the functioning of the motor. In this paper we ask: In the absence of a motor as the limiter, assuming some kind of ideal time keeping implement with the power to provide an arbitrarily large amount of torque, what would be the limits of the clock’s time-keeping abilities? We find the optimal material for such a construction to be beryllium and with calculations using the shear wave speed in this material we find a 4.4km length clock hand to be a reasonable upper limit to this clock’s abilities

    P2_6 Solar Leaf

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    This paper explores the reality of a gigantic photosynthetic surface with the goal of fulfilling thehuman species energy requirements. We determined that an area of approximately 3000 km2 would suffice in producing enough energy to power the planet for 1 year. Via a comparison to solar panels we suggest that this area or perhaps even smaller covered with modern solar panels could truly power the planet. However further research into this is certainly required

    P2_5 Kinetic Impact Weapon Jabba

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    Within the Star Wars fictional universe, the Death Star was a battle station used by a government called the Galactic Empire and was designed to be able to destroy planets with a “super laser”. For this paper, we considered a method to break apart the Death Star. Jabba the Hutt was a powerful gangster in the Star Wars universe and this paper looks into how the Death Star could have been broken apart by colliding a perfect sphere of multiple Jabba the Hutt characters with the Death Star. We found that the total number of Jabba the Hutt characters was 4.018x10^25
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