Relevant bibliographies by topics / Moving roofs

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Moving roofs'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Moving roofs"

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Trinkaus, John. "Snow on Motor Vehicle Roofs: An Informal Look." Psychological Reports 92, no. 3_suppl (June 2003): 1227–28. http://dx.doi.org/10.2466/pr0.2003.92.3c.1227.

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Following a snowstorm, a viewing of 4,347 moving noncommercial motor vehicles, which apparently had been outside during a storm, showed about 65% had roofs which had not been cleared of snow deposits—with vans outnumbering cars by about 2 to 1.
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Chen, Yong, Guo-Guang Liu, and Bing-Nan Sun. "Dynamic Response of Flat Roofs Subjected to Non-Stationary Moving Microbursts." Engineering Applications of Computational Fluid Mechanics 7, no. 4 (January 2013): 519–32. http://dx.doi.org/10.1080/19942060.2013.11015490.

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Al-Zu bi, Maha, and Osama Mansour. "Water, Energy, and Rooftops: Integrating Green Roof Systems into Building Policies in the Arab Region." Environment and Natural Resources Research 7, no. 2 (March 10, 2017): 11. http://dx.doi.org/10.5539/enrr.v7n2p11.

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Recent research claim that adopting green roof systems in building sectors in the Arab region is becoming necessary because of the current environmental, social, and economical challenges. Some Arab countries have already developed green building rating systems and recognized the importance of green roofs; however, they still do not fully benefit from such systems owing to limited supporting policies and financial incentives. The purpose of this article is to contribute to a better understanding of the potential role of green roof systems in effective planning and moving towards sustainable urban development in the Arab region. We argue that integrating green roof systems within governmental policies and green building strategies would potentially help in saving energy, enhancing water management, and coping with climate change. This paper presents a conceptual framework to help governments in the Arab region to adopt green roofs in their environmental policies. To present this framework; first, we studied the current international policies that adopt green roof systems and practices, then proposed a conceptual framework for adopting green roof systems in the Arab region. Second, we have chosen Cairo, Egypt, and Amman, Jordan from the Arab region to demonstrate the applicability of this framework at city level while considering the national and local context. This demonstration provides a novel perspective for the benefits of green roof systems in energy savings and water management in the Arab region.
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Droz, Anna G., Reid R. Coffman, Taylor G. Fulton, and Christopher B. Blackwood. "Moving beyond habitat analogs: Optimizing green roofs for a balance of ecosystem services." Ecological Engineering 173 (December 2021): 106422. http://dx.doi.org/10.1016/j.ecoleng.2021.106422.

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Pawlak-Jakubowska, Anita. "PARAMETRIC MODELLING OF CLASS II MECHANISMS APPLIED IN MOVABLE STRUCTURES." Boletim da Aproged, no. 34 (December 2018): 21–24. http://dx.doi.org/10.24840/2184-4933_2018-0034_0002.

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Movable engineering structures are an important topic of modern scientific issues connected with civil engineering. Working on solutions to these issues requires an interdisciplinary action in fields such as geometry, construction, machine theory and mechanics or automatics. The author work considers class II mechanisms in existing solutions that occur in moving engineering, such as retractable roofs and bridges. Movement realization has a major influence on the behaviour of the structure during displacement. The analysis of the movability of existing engineering objects supported by parametric modelling facilitates the study of movement and allows for new concepts of solutions. KEYWORDS: retractable roof, movable bridge, class II mechanisms, quadrangles.
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Sabri Salim, Muhammed. "Optimizing solar energy for houses with slanting type roofs." International Journal of Engineering & Technology 7, no. 2 (June 5, 2018): 913. http://dx.doi.org/10.14419/ijet.v7i2.11262.

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During the daily sun cycle, the falling rays are of varying intensity on the solar panel reducing the energy generated from it. This is evident in the energy production of solar panels that are installed on the slanted surfaces of homes scattered in the rain regions of the world. In this research, the reasons for the low efficiency of energy production of solar panels that are installed on the A-frame designs of homes were studied and solved. The design of an integrated tracking system is developed based on fuzzy logic control using an open source code that can be easily modified. The performance and characteristics of the solar tracking device are tested experimentally to test its suitability for use with slanted roofs homes. The integrated solar localization system offers economical and efficient solar monitoring, as well as open source programming, which allows for future improvements and changes. In addition, the single-axis fuzzy tracking system was good for moving both panels in less than five seconds towards the sun. The adoption of the proposed design provides an extremely accurate tracking system and therefore, maximizes the potential of power generated by the solar panel since it will meet the sun's rays from dawn to dusk. The economic effect of the proposed design is to approximately double the value of electrical power received compared to the fixed design.
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Vianna dos Santos, Patricia. "ENERGIA RENOVÁVEL; UTILIZAÇÃO DE ENERGIA SOLAR PARA ACIONAMENTO DE TELHADO MÓVEL." Revista Científica Semana Acadêmica 9, no. 209 (September 17, 2021): 1–24. http://dx.doi.org/10.35265/2236-6717-206-9132.

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The present work aims to exemplify a renewable and sustainable energy source as such the energy from sunlight to drive mobile coverage as a clean source of energy that does not cause damage to the environment, taking advantage of solar energy as a source of heat and light being one of the most propitious and reliable energies in the world. With the installation of solar panels at the roof top of houses, industries and plantations, the energy captured by the photovoltaic solar panel is sent to the load controller that powers the battery and the frequency inverter energizes the motor , allowing the activation of the cover with the objective of bringing greater comfort and satisfaction of our final client, people who want to have comfort in relation to their roofs, taking advantage of more than nature has to offer us, not only in homes but also in areas of leisure and entertainment, sheds, plantations and many other places that needs a roof, with the purpose of taking advantage of the sunlight, also saving the electric energy by making people aware of a more sustainable and renewable country. It is worth mentioning that in case of rain-sensitive plantations with the mobile cover, it will not be necessary to move to totally enclosed sheds, but in sheds using a structure such as that of the moving roof
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Kovic, Christine. "Jumping from A Moving Train: Risk, Migration and Rights at NAFTA's Southern Border." Practicing Anthropology 30, no. 2 (April 1, 2008): 32–36. http://dx.doi.org/10.17730/praa.30.2.322h537x62451722.

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July 2007. Hundreds of Central American migrants were camped along the railway tracks in Arriaga, Chiapas waiting to for the freight train to leave. Some were eating, perhaps their last food for days, others had bottles of water tied across their shoulders, some attempted to rest under the train cars to escape the hot sun. One young man brushed his teeth under the trees, using the water he carried in a recycled coca-cola bottle, to prepare himself for the journey ahead. Arriaga, a town of 25,000 people, is split in half by the train tracks. The town's tiny plaza, with a small playground, fondas (eateries), and a railway museum, sits on one side of the tracks. The town's church and market lie on the other. These Central American migrants in Arriaga, some 150 miles from Mexico's southern border with Guatemala, were eager to jump the freight train to continue their journey north to the United States. The train had not left Arriaga for a full week and many were desperate as they felt trapped. Their preparations underscored the dangers and harshness of the trip. They would have to hold on to the train for hours and days at a time, riding on ladders and the roofs of tank cars. Those who fall asleep and lose their grip risk death or severe injury, such as dismemberment.
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Larmour, Paul. "Philip Bell: a champion of the Modern Movement in Northern Ireland." Architectural Research Quarterly 17, no. 1 (March 2013): 49–62. http://dx.doi.org/10.1017/s1359135513000353.

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Architecture in Northern Ireland in the twentieth century followed much the same pattern as elsewhere in the British Isles moving, broadly, from historic styles around the turn of the century, through a phase of Arts and Crafts activity for a decade or so, until settling down to a concentrated period of interest in Neo-Georgian styling in the 1920s and '30s. This inter-war era included, however, some examples of Modernism, primarily of an ornamented Art Deco type but occasionally of a more plain variety which ranged between Functionalism and the International Style. Examples of this type of modern architecture – characterised by flat roofs, white walls, large horizontal windows and a general avoidance of ornamentation – formed only a comparatively small part of the overall output of the period in Northern Ireland, and, for most architects who were involved, their contribution amounted to little more than a building or two; such was the prevailing tradition-bound architectural mood of the time.One architect in Northern Ireland, however, demonstrated a commitment to the Modern Movement that appears to have been greater than most. That was Philip Bell, whose name has been mentioned from time to time by various commentators, whether as a designer of Modernist houses or as the architect of one other particularly well-known building of the 1930s in Northern Ireland, the Strangford Lough Yacht Club House, which was an accomplished and stylish enough building to have been featured in the English architectural press at the time.
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Ravi Subrahmanyam, B., and A. Ambikapathy. "Automatic moving floor for smart rooms." IOP Conference Series: Materials Science and Engineering 594 (September 16, 2019): 012034. http://dx.doi.org/10.1088/1757-899x/594/1/012034.

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Dissertations / Theses on the topic "Moving roofs"

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Brown, Tyler. "Books Balls and Walls – Mt. Vernon Library and Recreation Center." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33331.

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"A significant work of architecture is never the product of a single individual. It is always a collaboration with history and tradition, with the silent wisdom of the discipline of architecture. An architect who understands the essence of his craft accepts his role as a builder of a tradition, and he places his work in the context of this continuum with combined humility and pride." Juhani Pallasmaa.
Master of Architecture
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Miller, Ryan J. "Implementing Green Roofs on Movie Theaters and Shopping Centers: Business Cases in Profitable Sustainability." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/pomona_theses/99.

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This thesis presents the business case for installing green roofs on movie theaters and shopping centers. These businesses can then derive increased profits from the environmental benefits of reduced energy use and increased stormwater retention. After presenting the basic design and benefits of a green roof, the thesis develops stand-alone business plans for a movie theater and shopping center. The author finds that green roofs are a profitable sustainability solution for the commercial enterprise.
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Wu, Jun Wei, and 吳俊緯. "An experimental study of the effects of a moving automatic guided vehicle on airflow patterns in clean rooms." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/tfwc7h.

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碩士
國立臺北科技大學
能源與冷凍空調工程系碩士班
96
A moving object, such as automatic guided vehicles (AGV), automatic stockers, or other similar loaders, destroys the uni-directional airflow patterns in clean rooms. The particles provoked by wake and vortex behind the AGV possibly contaminate the wafers or the substrate on a cassette. This research examined the influences of velocities of the airflow and the AGV, moving on the raised floor with an opening rate of 19%, on the airflow patterns, and measured the quantities of particles at the back and the top of the AGV, moving on the raised floor with opening rates of 19% and 50%, at conditions of particles released by a tool and no particle generation. This study conducted experimental measurements in a reduced-scale uni-directional clean room with a ceiling coverage rate of 100%. Results show that the wake at the back of AGV became induced airflow, and the clean downward flow suppressed the rebounded air flow from the raised floor and limited its rebounded height. The quantities of particles at the back and the top of the moving AGV were also measured at various velocities of airflow and AGV at the two opening rates of the raised floor.
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Neves, Ana Cristina Trindade. "A Holistic Approach to the Ontario Curriculum: Moving to a More Coherent Curriculum." Thesis, 2009. http://hdl.handle.net/1807/18107.

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This study is an interpretive form of qualitative research that is founded in educational connoisseurship and criticism, which uses the author’s personal experiences as a holistic educator in a public school to connect theory and practice. Key research questions include: How do I, as a teacher, work with the Ontario curriculum to make it more holistic? What strategies have I developed in order to teach a more holistic curriculum? What kinds of difficulties interfere with my practice as I attempt to implement my holistic philosophy of education? This dissertation seeks to articulate a methodology for developing holistic curriculum that is in conformity with Ontario Ministry guidelines and is also responsive to the multifaceted needs of the whole student. The research findings will serve to inform teachers who wish to engage in holistic education in public schools and adopt a curriculum that is transformative while still being adaptable within mainstream education.
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Books on the topic "Moving roofs"

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John, Harris. Moving rooms. New Haven [Conn.]: Yale University Press for the Paul Mellon Centre for Studies in British Art, 2007.

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ill, Pilkington Brian, ed. Flowers on the roof. [Reykjavík]: Mál og menning, 1996.

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Roots and wings: Poems to my daughter : your growing up and moving away from home hasn't been easy for me. Boulder, Colo: Blue Mountain Press, 1996.

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Faithful and fearless: Moving feminist protest inside the church and military. Princeton, N.J: Princeton University Press, 1998.

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Ren shi hui dong de shu, dou you kan bu jian de gen = Humans are just like moving trees with invisible roots. Taibei Shi: Ren ben zi ran wen hua shi ye you xian gong si, 2012.

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(Composer), Sheldon Harnick, and Jerry Bock (Composer), eds. Fiddler on the Roof (MOVIE): Vocal Score. Hal Leonard Corporation, 2006.

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Moving Rooms: The Trade in Architectural Salvages (Paul Mellon Centre for Studies in British Art). Paul Mellon Centre BA, 2007.

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Kim, Monica. The Interrogation Rooms of the Korean War. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691166223.001.0001.

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Traditional histories of the Korean War have long focused on violations of the thirty-eighth parallel, the line drawn by American and Soviet officials in 1945 dividing the Korean peninsula. But this book presents an entirely new narrative, shifting the perspective from the boundaries of the battlefield to inside the interrogation room. The book demonstrates how the Korean War evolved from a fight over territory to one over human interiority and the individual human subject, forging the template for the US wars of intervention that would predominate during the latter half of the twentieth century and beyond. The book looks at how, during the armistice negotiations, the United States and their allies proposed a new kind of interrogation room: one in which prisoners of war could exercise their “free will” and choose which country they would go to after the ceasefire. The global controversy that erupted exposed how interrogation rooms had become a flashpoint for the struggles between the ambitions of empire and the demands for decolonization, as the aim of interrogation was to produce subjects who attested to a nation's right to govern. The complex web of interrogators and prisoners that the book uncovers contradicts the simple story in US popular memory of “brainwashing” during the Korean War. Bringing together a vast range of sources that track two generations of people moving between three continents, the book delves into an essential yet overlooked aspect of modern warfare in the twentieth century.
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Stephens, Piers. Environmental Political Theory and the Liberal Tradition. Edited by Teena Gabrielson, Cheryl Hall, John M. Meyer, and David Schlosberg. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780199685271.013.22.

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This chapter discusses the history of environmental concern within the liberal tradition from the latter’s roots onwards, moving from the private property orientated “old liberalism” of John Locke into the self-development orientated “new liberalism” of John Stuart Mill, then onwards into American pragmatism and the neutralist liberalism of John Rawls and his contemporary followers. This leads into an overview of the current debate, which started in the 1990s, over the possibilities of synthesizing environmentalist goals of sustainability and nature protection with some variant of liberalism. The chapter concludes with an argument that yokes the new liberal concern with self-development to the environmentalist emphasis on nature protection, arguing that the continued existence of relatively untransformed nonhuman nature is a vital precondition and assistance to human imaginative development and thus freedom.
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Mazzolai, Barbara. Growth and tropism. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199674923.003.0009.

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Plants or plant parts, such as roots or leaves, have the capacity of moving by growing in response to external stimuli with high plasticity and morphological adaptation to the environment. This chapter analyses some plant features and how they have been translated in artificial devices and control. A new generation of ICT hardware and software technologies inspired from plants is described, which includes an artificial root-like prototype that moves in soil imitating the sloughing mechanism of cells at the root apex level; as well as innovative osmotic-based actuators that generate movement imitating turgor variation in the plant cells. As future directions, new technologies expected from the study of plants concern energy-efficient actuation systems, chemical and physical microsensors, sensor fusion techniques, kinematics models, and distributed, adaptive control in networked structures with local information and communication capabilities.
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Book chapters on the topic "Moving roofs"

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Blokland, Talja. "On Roots and Routes." In Moving Cities – Contested Views on Urban Life, 29–42. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-18462-9_3.

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Schneider, Arnd. "Setting up Roots: On the Set of a Cinema Movie in a Mapuche Reservation." In Appropriation as Practice, 111–31. New York: Palgrave Macmillan US, 2006. http://dx.doi.org/10.1057/9781403983176_6.

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Long, F. Y. "Psychology in Singapore: Its Roofs, Context and Growth." In Psychology Moving East, 223–48. Routledge, 2019. http://dx.doi.org/10.4324/9780429303333-16.

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Garland, Robert. "Conclusions." In Wandering Greeks. Princeton University Press, 2014. http://dx.doi.org/10.23943/princeton/9780691161051.003.0012.

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This concluding chapter argues that the brilliance of Greek civilization was predicated in part upon the shiftlessness of its population. Being Greek meant facing the prospect of being displaced at some point in one's life without any certainty of return. When compelled to do so, the Greeks were fully capable of putting their roofs on their backs and moving an entire population elsewhere. It was also the case that the mobility of the Greeks, and the spirit of adaptability that this bred inside them, encouraged the construction of panhellenic institutions and fostered cultural homogeneity. Greece, in sum, was a civilization of displaced persons.
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Repič, Jaka. "Tracing Roots:." In Moving Places, 85–104. Berghahn Books, 2016. http://dx.doi.org/10.2307/j.ctvr694z4.7.

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Fillitz, Thomas. "Movement versus Roots?" In Moving Places, 194–210. Berghahn Books, 2016. http://dx.doi.org/10.2307/j.ctvr694z4.12.

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Stevenson, Harold. "Moving Away From Stereotypes and Preconceptions." In Cross-Cultural Roots of Minority Child Development, 313–19. Psychology Press, 2014. http://dx.doi.org/10.4324/9781315746555-18.

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Adams, Gordon. "Moving the Public: Advertising and the Grass Roots." In The Politics of Defense Contracting, 185–97. Routledge, 2020. http://dx.doi.org/10.4324/9780429338304-16.

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Har-El, Rivi. "Introduction: The Roots of the RiVision® Method." In Moving Pain Away RiVision®: An Innovative Physical Therapy Method, 1. Jaypee Brothers Medical Publishers (P) Ltd., 2017. http://dx.doi.org/10.5005/jp/books/12967_2.

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Gonçalves, Wayner Tristão. "Gif as a Narrative Tool." In Handbook of Research on Contemporary Storytelling Methods Across New Media and Disciplines, 224–39. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6605-3.ch012.

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This chapter centres around a new type of creative and artistic expression, namely the gif. Positioned somewhere between an image and a video, the gif provides an interesting sense of narrative, since it presents itself on a never-ending loop. Although this type of moving image is currently associated with contemporary social media and the internet, its roots go back to the beginning of cinematic history, when the first recorded moving images were displayed repeatedly in from of the viewer. As such, starting from these cinematic roots, the present chapter will deal with the intricacies of the gif's narrative pattern and the status of art on the internet, before delving into the analysis of a series of gifs which were part of an art exhibition.
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Conference papers on the topic "Moving roofs"

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Friedman, Donald, Acen Jordan, Jack Bish, Carl E. Nash, and Terence Honikman. "Rollover Roof Test Results for a Production Vehicle." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59888.

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We have described the Jordan Rollover System (JRS), a dynamic rollover test fixture, in previous reports (Friedman and Nash 2002 and Friedman et al., 2003). The JRS addresses the shortcomings — lack of repeatability and control over test conditions — of previous rollover tests and test devices including various static, drop, and dynamic roll tests. The JRS is designed to emulate specific roof impacts in actual multiple rollovers in a highly repeatable, controlled test. The JRS holds a passenger compartment at the desired pitch and yaw between two drop towers. The vehicle is rotated about its roll axis and, at the appropriate time, the front end is dropped to contact a moving roadway at a prescribed road speed; roll rate; drop height; and roll, pitch and yaw angles. Vehicle parameters can be changed and anthropomorphic crash test dummies added depending upon the variables being tested. We have conducted tests with production vehicles illustrating the performance of production roofs under controlled test situations and at varying strength-to-weight ratios. One such test is described here.
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Hamill, Brian. "Kinetic Architecture Application at The Shed at Hudson Yards." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0767.

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<p>As the arrangement of modern performance art evolves to be more dynamic and fluid, the physical and programmatic flexibility of performance spaces plays a vital role in the long-term sustainability of these facilities. Because of its transformable nature and ability to provide unprecedented flexibility, kinetic architecture is a fast-growing field which integrates architecture with electro-mechanical and structural engineering. Building functionality and performance integration is enhanced by moving various elements to reconfigure a space to the desires of its artists. Retractable roofs have been used in stadiums and other types of facilities to control environmental effects; however, this case study demonstrates how kinetic architecture has been creatively adapted to provide a highly flexible performance and exhibit space.</p><p>This paper provides a brief overview of the design and construction of The Shed at Hudson Yards. This twelve- story high moving structure, weighing 3725 tonnes (8,000,000 pounds), is designed to be moved from its nested position over a fixed building to its deployed position over the adjacent plaza. The Shed’s deployed position creates an enclosed space similar in size and scale to the main concourse of Grand Central Terminal. For additional flexibility, The Shed also features large movable wall sections which can be opened allowing air and pedestrian movement through the plaza space.</p>
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Coraggio, Gaetano, Gianfranco Rizzo, Cecilia Pisanti, and Adolfo Senatore. "Energy Management and Control of a Moving Solar Roof for a Vehicle." In 10th International Conference on Engines & Vehicles. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-24-0072.

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Friedman, Donald, Acen Jordan, Carl Nash, Jack Bish, Terence Honikman, and Jason Sigel. "Repeatable Dynamic Rollover Roof Test Fixture." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43076.

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Experimental rollover tests have been criticized for their poor emulation of actual rollovers and for their lack of repeatability. We have designed and built a test fixture that overcomes both of these criticisms. The fixture holds a passenger compartment, weighted to match the inertia characteristics of a complete vehicle, or a complete vehicle at the appropriate pitch and yaw. The compartment is then rotated about its principal (longitudinal) axis through an arc that mimics the rolling motion of an entire vehicle. At the appropriate roll angle and falling velocity, the roof strikes a moving patch of concrete. The compartment is controlled throughout the sequence and is suspended after the impact, so that a sequence of impacts can be individually studied in separate tests. Initial tests have shown that we can achieve repeatable impacts. Test variables include pitch, yaw, roll rate and vehicle center of gravity motion (both lateral and vertical velocity). This test device addresses the various shortcomings of previous rollover tests, fixtures and the various static and drop tests of vehicles conducted to determine rollover performance.
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Cui, Lei, and Jian S. Dai. "A Polynomial Approach to Inverse Kinematics of Rolling Contact." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70852.

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A moving object has three rotational degrees of freedom with respect to the fixed one when the two objects maintain rolling contact. Thus three kinematic inputs are considered necessary for the moving object to follow a trajectory described by its velocity profile as function of time. This paper formulates the problem as a system of three nonlinear equations and reduces it to solving a polynomial of degree six with one variable. This leads to fast and accurate numerical approximations of roots on a computer either by commercial software or open-source software. This polynomial formulation is different from previous ones that require solving a system of nonlinear ordinary differential equations.
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Hu, Ming-Hui, Shan-Tung Tu, Fu-Zhen Xuan, and Zheng-Dong Wang. "On-Line Structural Damage Feature Extraction Based on Autoregressive Statistical Pattern of Time Series." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28142.

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The main aim of this paper is to demonstrate an autoregressive statistical pattern analysis method for the on-line structural health monitoring based on the damage feature extraction. The strain signals obtained from sensors are modeled as autoregressive moving average (ARMA) time series to extract the damage sensitive features (DSF) to monitor the variations of the selected features. One algebra combination of the first three AR coefficients is defined as damage sensitive feature. Using simple theory of polynomial roots, the relationship between the first three AR coefficient and the roots of the characteristic equation of the transfer function is deduced. Structural damage detection is conducted by comparing the DSF values of the inspected structure. The corresponding damage identification experiment was investigated in X12CrMoWVNbN steel commonly used for rotor of steam turbine in power plants. The feasibility and validity of the proposed method are shown.
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Zhang, Change-de, and Shin-Min Song. "Forward Position Analysis of Nearly General Stewart Platforms." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0201.

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Abstract This paper presents the closed-form solution of forward position analysis of the nearly general stewart platform, which consists of a base and a moving planar platforms connected by six extensible limbs through spherical joints in the two planar platforms. It becomes a general stewart platform if the centers are not constrained to those two planes. In this study, transformation matrix is used to represent the position of the moving platform. Based on the six dependency equations of the rotation matrix and the six constraint equations related to the six link lengths, a set of six 4-th degree equations in three unknowns are derived. Further derivations produce twenty-one dependent constraint equations. By simultaneous elimination of two unknowns a 20-th order polynomial equation in one unknown is obtained. Due to dual solutions of other unknowns, this indicates a maximum of forty possible solutions. The roots of this polynomial are solved numerically and the realistic solutions are constructed using computer graphics.
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Fujita, Katsuhisa. "Dynamic Stability of a Flexible Plate Moving in a Parallel Flow." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97132.

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Abstract:
The dynamic stability of a flexible plate subjected to a parallel flow is investigated when it moves in a flowing fluid. As the flexible flat plates, the papers in a high speed printing machine, the papers discharged by a paper machine, and the thin plastic and metal films, the fluttering flag and the oscillating doom roof caused by wind are enumerated. The fluid is assumed to be treated as an ideal fluid in a subsonic domain, and the fluid pressure is calculated using the velocity potential theory. The fluid-structure coupled equation of motion of a flexible flat plate supported simply at the both ends is derived into consideration with the added mass, added damping and added stiffness of a fluid, respectively. In addition, the effect of tension acting on a flexible plate, the influence of velocity of a moving plate and that of a fluid velocity, are also included into the coupled equation of motion respectively. The eigenvalue analysis is performed for the dynamic stability analysis. Changing the velocities of a plate and a fluid, and the specifications of a plate as parameter studies, the influences of these parameters on the dynamic stability of a plate are clarified. It is made clear that the plate moving in a still fluid becomes unstable at slightly lower velocity than the stationary plate subjected to a parallel flow. Moreover, it is found that the present solution shows a good agreement with the already reported experiments in which the flexible flat plate was a paper.
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9

Hutchinson, John, and Keith Friedman. "Comparison of the Jordan Rollover System With an Over the Ground Rollover." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68876.

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The Jordan Rollover System (JRS) is a physical test apparatus which evaluates vehicle rollover protection performance by dropping a rotating vehicle with a stationary CG position onto a moving road bed. This test configuration permits control and monitoring of the rollover test conditions, and allows the rollover test to be conducted in a limited space. A finite element study was conducted to determine how well the JRS test replicates the impact environment of an equivalent over-the-ground rollover event. In particular, the effects of the finite mass of the test roadbed and the test apparatus constraints were examined. The finite element study showed that roof intrusion measures occurring during the JRS test do not vary significantly from those resulting from an unrestrained over-the-ground rollover impact with the same initial conditions.
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10

Zhang, Ying, Qizheng Liao, Shimin Wei, Feng Wei, and Duanling Li. "A New Algebraic Solution to Inverse Static Force Analysis of a Special Planar Three-Spring System." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59790.

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In this paper, we present a new algebraic elimination algorithm for the inverse static force analysis of a special planar three-spring system. The system consists of three linear springs joined to the ground at the two fixed pivots and connected to the two moving pivots at the platform. When exerted by specified static force, the goal of inverse static analysis is to determine all the equilibrium configurations. First of all, a system of seven polynomial equations in seven variables is established based on the geometric constraint and static force balancing. Then, four basic constraint equations in four variables are obtained by variable substitution. Next, a 20 by 20 resultant matrix is reduced by means of three consecutive Sylvester elimination process. Finally, a 54th-degree univariate polynomial equation is directly derived without extraneous roots in the computer algebra system Mathematica 9.0. At last, a numerical example is given to verify the elimination procedure.
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