66 research outputs found

    Classification of Unsecured Claims in Chapter 13 of the Bankruptcy Reform Act of 1978: What is Fair?

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    The subject of the classification of unsecured claims in Chapter 13 is a subject which has been written about before. There have also been several informative and well written articles dealing with Chapter 13 in general, which also refer to the problem of classification of claims in Chapter 13. This article will not attempt to reiterate the principles and concepts stated in those articles

    P4_3 Total Free Fall

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    This paper analyses the logistics of The Fall, a fictional elevator through the Earth in the 2012 film Total Recall. In the film, it is claimed that the elevator can make its journey in 17 minutes by free falling through the centre of the planet. By modelling the actual free fall of an object in a vacuum through the Earth, it is shown that this trip would in fact take over 42 minutes. Drag forces were then considered, showing that without an external force The Fall would enter damped harmonic motion and would never reach its destination

    P4_2 Beam Me Up

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    The effects of sending a laser powered platform to low Earth orbit are investigated. We consider the effects of drag, attenuation by the atmosphere and divergence of the laser beam. It is found that a 1000kg platform could be accelerated to an altitude of 200km using an average laser power of 1.8 terawatts; however it is unfeasible to extend this argument to a much more massive space shuttle sized object

    P4_7 Make a Brake for It!

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    AbstractThe paper investigates the plausibility of using a solar sail to reduce the orbital radius of a satellite around Mars instead of rocket thrusters. This is done by calculating the surface area of sail needed to lower the orbital radius from 3657km to 3517km by deploying the sail for a quarter of the orbit. The resulting surface area is 2.5x10 km2, which is impractical as a replacement for current methods

    P4_6 A Good Hose Down

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    This paper investigates the maximum pressure of a fire hydrant that a human can withstand before losing control due to the impulse at the hose aperture. The effects of static friction and the maximum grip force are compared, and it is found that at a hydrant pressure of 131KPa, a human will lose grip of the hose, whereas a pressure of 140KPa is required to cause the handler of the hose to begin to slide backwards

    Silicon device performance measurements to support temperature range enhancement

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    Characterization results of a MOS controlled thyristor (MCTA60P60) are presented. This device is rated for 60A and for an anode to cathode voltage of -600 V. As discussed in the last report, the MCT failed during 500 V leakage tests at 200 C. In contrast to the BJT (bipolar junction transistor), MOSFET, and IGBT (insulated gate bipolar transistor) devices tested, the breakdown voltage of the MCT decreases significantly with increasing temperature

    Signaling via interleukin-4, receptor alpha chain is required for successful vaccination against schistosomiasis in BALB/c mice

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    Radiation-attenuated (RA) schistosome larvae are potent stimulators of innate immune responses at the skin site of exposure (pinna) that are likely to be important factors in the development of Th1-mediated protective immunity. In addition to causing an influx of neutrophils, macrophages, and dendritic cells (DCs) into the dermis, RA larvae induced a cascade of chemokine and cytokine secretion following in vitro culture of pinna biopsy samples. While macrophage inflammatory protein 1 and interleukin-1 (IL-1) were produced transiently within the first few days, the Th1-promoting cytokines IL-12 and IL-18 were secreted at high levels until at least day 14. Assay of C3H/HeJ mice confirmed that IL-12 secretion was not due to lipopolysaccharide contaminants binding Toll-like receptor 4. Significantly, IL-12 p40 secretion was sustained in pinnae from vaccinated mice but not in those from nonprotected infected mice. In contrast, IL-10 was produced from both vaccinated and infected mice. This cytokine regulates IL-12-associated dermal inflammation, since in vaccinated IL-10/ mice, pinna thickness was greatly increased concurrent with elevated levels of IL-12 p40. A significant number of IL-12 p40 cells were detected as emigrants from in vitro-cultured pinnae, and most were within a population of rare large granular cells that were Ia, consistent with their being antigen-presenting cells. Labeling of IL-12 cells for CD11c, CD205, CD8, CD11b, and F4/80 indicated that the majority were myeloid DCs, although a proportion were CD11c F4/80, suggesting that macrophages were an additional source of IL-12 in the skin
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