3,516 research outputs found

    Results of the Magnetorquer Wrapping

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    This summer I had worked with a team of engineers on a life-changing research project that is important to the well-being of living. This project has also afforded me the opportunity to develop a lesson plan around the research that I conducted about satellites, not only will this lesson plan contain research done by myself but by other researchers as well. The first step of my research consisted of me learning about satellites and all their capabilities. Once I had gained new knowledge about satellites I was then tasked to learn about a specific satellite known as Technological and Educational Nanosatellite 7 (TechEdSat7), which was the satellite that the my team was tasked to working on in (JPL) Jet Propulsion Lab. The second step of my research then consisted of me doing “the history of mathematics” to find out what ideas had led to satellites being develop in today’s society. When doing the mathematics research I expanded my knowledge about mathematic techniques, methods, and formulas across many regions in the world like Europe 400-1200AD and Middle East 700-1200AD; furthermore, I learned about famous scientists/philosophers and their ideas like Sir Isaac Newton, Gottfried Wilhelm von Leibniz to help stretch my research. This preliminary research was important so that I can make a connection between mathematics and satellites so that I can translate such high level knowledge to elementary students. The next phase of my project was to then find out how the “Eratosthenes Measurement (276-195 B.C)” was so instrumental in astronomy for satellites to be so effective. The last stage of my project was helping develop a nanosatellite and creating a lab procedure for future and fellow engineers when making a nanosatellite

    The Connection between Professional Sporting Events, Holidays and Domestic Violence in Calgary, Alberta

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    There are some days in Calgary, Alta when domestic violence is more likely to happen than other days. There is a statistically significant connection between higher rates of domestic violence and certain Calgary Stampeders’ football games as well as the arrival of the Calgary Stampede. During the 10-day-long Calgary Stampede, domestic violence calls on the seventh, ninth and tenth day of Stampede, were up 15 per cent compared to an average day. Weekends and summer months were also generally associated with the highest rates of domestic violence reports in Calgary. When it came to Calgary Stampeders’ football games, calls were higher only when the Stampeders faced off against the rival Edmonton Eskimos – with a 15 per cent increase in domestic violence reports. Grey Cup games in which Calgary played were associated with a 40 per cent increase in reports of domestic violence. However, games played by the Calgary Flames seemed to have no relationship to domestic violence calls, even those against the rival Edmonton team. Also, New Year’s Day appears to be associated with a significant spike in domestic violence, going by a four-year count of phone calls reporting domestic violence to both police and a local help line for those experiencing domestic and sexual abuse. There are also increases in calls associated with Good Friday, Easter, Canada Day, Labour Day, Valentine’s Day and Halloween. Meanwhile, the 2013 catastrophic floods in Calgary resulted in an increase in reports of domestic violence to police and the Connect help line, averaging an additional 6.6 reported incidents of domestic violence per day during the flood, 14 per cent higher than average. A correlation was also found in Calgary between the fall in oil prices and the rise in calls, with every US$10 fall in the price of West Texas Intermediate resulting in an extra call for help every two days. Since reducing domestic violence requires recognizing possible contributing factors and finding ways to counteract their effect, identifying these correlates is the first step to prevention. New places to look, based on these results, are highly charged Stampeder football games, the Calgary Stampede, weekends, summer months and certain holidays. Based on the study results, the authors recommend increasing publically funded childcare and affordable family outings; working with sporting organizations to better educate and support gender equity, healthy relationship skills and bystander skills; increasing training in social and emotional learning for parents and families; and conducting further research on the role of alcohol in domestic violence

    Community Participation and Multidimensional Child Growth:Evidence from the Vietnam Young Lives Study

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    BACKGOUND: Community participation has the potential to improve the effects of interventions and reduce inequalities in child growth. Multidimensional indicators capture such effects and inequalities. OBJECTIVES: The objective of this study was to measure the association between multidimensional child growth and community participation in 2 nutrition-sensitive interventions. METHODS: A Multidimensional Index of Child Growth was calculated with the 5-y-old cohort of the Vietnam Young Lives Survey. Young Lives is a unique dataset that has information on community participation in the design and implementation stages of 2 interventions: a health and a water, sanitation, and hygiene (WASH) intervention. Community participation during the interventions was recorded retrospectively with interviews at the household level. Ordinary least-squares and quantile regressions were estimated using data on 240 children. A Multidimensional Index of Child Advantage, sex, and location (urban/rural) were included as control covariates. RESULTS: A positive association (post hoc statistical power = 0.859) was estimated for community participation during the design stage of the WASH intervention, particularly for the most deprived children (P < 0.05). Negative effects were estimated for the health intervention during the design stage (P < 0.05) and no significant effects were found for community participation during the implementation stage of the interventions. Instead of the physical dimension, the significant associations in the design stage were related to the nonphysical dimension of child growth. Inequalities in multidimensional growth were found for children living in rural areas, but not for girls. CONCLUSIONS: The association between community participation and multidimensional child growth is indicative of the importance of community participation during the design phase of interventions, in particular for the nonphysical dimensions of child growth related to social and psychological factors. The benefits of participation were greater for urban children compared with rural children, which deserves further attention

    Possible evidence for variation in magnitude for marsquakes from fallen boulder populations, Grjota Valles, Mars

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    Following observations of mobilized boulder trail populations from Cerberus Fossae, Mars, that have been interpreted as possible evidence of large magnitude marsquakes rupturing for distances of ~207 km along exposed active faults, additional boulder trail populations were measured along shorter faults within the region of Grjota Valles (50-150 km length) to test the hypotheses that (1) these faults are also candidate locations for marsquakes, and (2) that marsquake magnitude might be smaller, limited by fault dimensions available for rupture. For a region containing two en echelon graben, boulder trail data define two anomalies with maxima in (a) boulder trails per kilometer, and (b) maximum width of boulder trails, one that is ~116 km in length along strike and the other ~70 km in length along strike. Values for the maxima are 45 trails per km and 5 m mean trail width for the 70 km long anomaly, and 115 trails per km with 5.3 m mean trail width for the 116 km long anomaly, above background values measured elsewhere along these faults of zero trails per kilometer with zero boulder trail widths. If combined with published data from Cerberus Fossae with a ~207 km long anomaly in boulder trails per km (125 trails per km maxima) and maximum mean boulder trail width (8.5 m maximum trail width), the 3 datasets suggest correlations between the (a) along-strike length of boulder trail anomalies, (b) boulder trails per km and (c) maximum boulder trail width. If interpreted as due to single marsquakes, and if the dimensions of these anomalies are a proxy for rupture length, when combined, one interpretation of this is that boulders have been mobilized by marsquakes and that the marsquake magnitude is proportional to the along strike length of the anomalies. In other words, the data suggest that marsquake magnitude, if that is the cause of the anomalies, is limited by fault length as expected for terrestrial seismically active faults. Such findings suggest that the Martian surface may have been shaken, in the very recent past, by large magnitude marsquakes. We discuss this in terms of the seismicity of Mars

    A New Supersymmetric CP Violating Contribution to Neutral Meson Mixing

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    We study the contribution to flavor changing neutral current processes from box diagrams with light higgsinos and squarks. Starting with just the Cabbibo Kobayashi Maskawa (CKM) phase, we find contributions to the K0K^0 and B0B^0 meson mass matrices that are out of phase with the Standard Model contributions in the case of substantial mixing between the up-type squarks. This difference in phase could be large enough to be detected at the proposed BB factories, with interesting implications for the unitarity triangle of CKM matrix elements.Comment: 1 reference added, 1 reference clarified, 2 typos corrected (QCD corrections to K meson mixing in Tables 1 and 3). To be published in Phys. Rev. D. 15 pages (Latex), 2 figures and epsfig.sty submitte

    The effect of pulmonary rehabilitation on mortality, balance, and risk of fall in stable patients with chronic obstructive pulmonary disease: a systematic review

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    Objectives: To evaluate the impact of pulmonary rehabilitation on survival and fall (including balance) in patients with chronic obstructive pulmonary disease (COPD) at stability. Design: Systematic Review. Methods: OVID, MEDLINE, EMBASE, and Cochrane Collaboration Library were searched for literature dating from January 1980 up to November 2014 as well as an update in October 2015. Two reviewers screened titles, abstracts and full text records, extracted data and assessed studies for risk of bias; any disagreements were resolved by a third member of the team, and consensus was always sought. Results: Initial searches yielded 3216 records but after review, only 7 studies were included and no studies focused solely on falls. Two cohort studies found some positive benefits of pulmonary rehabilitation on balance but the results were inconsistent across the studies. Regarding survival, two randomised controlled trials were conducted; one study showed significant survival benefit at 1 year while the other one showed non-significant survival benefit at 3 years. Neither were adequately powered and in both, survival was a secondary outcome. Conclusions: There was only limited inconclusive evidence to show that pulmonary rehabilitation has a significant beneficial effect on balance or survival

    chi^2 Analysis of Supersymmetric Models

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    We discuss the results of a global fit to precision data in supersymmetric models. We consider both gravity- and gauge-mediated models. As the superpartner spectrum becomes light, the global fit to the data typically results in larger values of chi^2. We indicate the regions of parameter space which are excluded by the data. We discuss the additional effect of the B(B --> X_s\gamma) measurement. Our analysis excludes chargino masses below MZ in the simplest gauge-mediated model with mu>0, with stronger constraints for larger values of tan beta.Comment: 11 pages, 13 figures. Talk given by D.M.P. at the 5th International Conference on Supersymmetries in Physics (SUSY 97), Philadelphia, Pennsylvania, May 27-31, 199

    Positronium Portal into Hidden Sector: A new Experiment to Search for Mirror Dark Matter

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    The understanding of the origin of dark matter has great importance for cosmology and particle physics. Several interesting extensions of the standard model dealing with solution of this problem motivate the concept of hidden sectors consisting of SU(3)xSU(2)_LxU(1)_Y singlet fields. Among these models, the mirror matter model is certainly one of the most interesting. The model explains the origin of parity violation in weak interactions, it could also explain the baryon asymmetry of the Universe and provide a natural ground for the explanation of dark matter. The mirror matter could have a portal to our world through photon-mirror photon mixing (epsilon). This mixing would lead to orthopositronium (o-Ps) to mirror orthopositronium oscillations, the experimental signature of which is the apparently invisible decay of o-Ps. In this paper, we describe an experiment to search for the decay o-Ps -> invisible in vacuum by using a pulsed slow positron beam and a massive 4pi BGO crystal calorimeter. The developed high efficiency positron tagging system, the low calorimeter energy threshold and high hermiticity allow the expected sensitivity in mixing strength to be epsilon about 10^-9, which is more than one order of magnitude below the current Big Bang Nucleosynthesis limit and in a region of parameter space of great theoretical and phenomenological interest. The vacuum experiment with such sensitivity is particularly timely in light of the recent DAMA/LIBRA observations of the annual modulation signal consistent with a mirror type dark matter interpretation.Comment: 40 pages, 29 Figures 2 Tables v2: Ref. added, Fig. 29 and some text added to explain idea for backscattering e+ background suppression, corrected typos v3: minor corrections: Eq 2.1 corrected (6 lines-> 5 lines), Eq.2.17: two extra "-" signs remove

    Talking textiles, making value: Catalysing fashion, dress, and textiles heritage in the Midlands

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    This is an accepted manuscript of an article published by Taylor & Francis in Journal of Textile Design Research and Practice on 11/11/2019, available online: https://www.tandfonline.com/doi/full/10.1080/20511787.2019.1682909 The accepted version of the publication may differ from the final published version.There are hundreds of small museums, archives, and collections in the English Midlands, United Kingdom (UK), many of which are the legacy of the region’s rich industrial heritage. A surprising number of these include dress and textiles in various forms, from the costume collection of Charles Paget-Wade at Berrington Hall (Leominster) to intricately stitched smocks made by local needlewomen in Herefordshire, and the wealth of manufacturers’ samples that comprise the silk ribbon trade archive at the Herbert Museum, Coventry. These are challenging times for many such organisations as they face cutbacks in staff and local authority funding. Yet they offer a unique and largely unexploited resource for staff, students, and researchers in art and design higher education (HE), not only for primary research but also as a catalyst for design innovation. The discussion here, which takes the format of group research practitioner interview, builds on a Knowledge Exchange event that was held December 2017 at the Fashion Lab, University of Wolverhampton (UoW). The event brought together a diverse group of fashion and textiles professionals to talk, exchange ideas, take part in object handling sessions, mind-map, and brain-storm how to catalyse connections between heritage collections and higher education and build value. With seed funding from the Museum-University Partnership Initiative (MUPI) (see National Co-ordinating Centre for Public Engagement - NCCPE 2019), the day built on a series of scoping visits to collections in the region undertaken by Professor Fiona Hackney and Dr Emily Baines. The group involved staff, students and museum professionals including those from UoW, De Montfort University (DMU), Hereford College of Arts (HCA), Nottingham Trent University (NTU), artist Ruth Singer who leads the Arts Council-funded Criminal Quilts project in association with Staffordshire Record Office (Singer 2019), and representatives from Herefordshire Museum Service, the Herbert Gallery (Coventry), Walsall Museums Service, the Lace Guild Stourbridge, and Ironbridge Gorge Museum Trust. The following conversation reflects themes that emerged in the project including: the need to embed archival work and primary research in fashion and textiles curricula at all levels, the development of hubs to connect university research with museum practice, the added value of artist-led projects, and the significance of place-based textiles heritage as a catalyst for new business and sustainable design practice
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