Relevant bibliographies by topics / #NoDAPL movement

Academic literature on the topic '#NoDAPL movement'

Author: Grafiati
Published: 25 July 2024
Last updated: 31 July 2024

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Journal articles on the topic "#NoDAPL movement"

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Deem, Alexandra. "Mediated Intersections of Environmental and Decolonial Politics in the No Dakota Access Pipeline Movement." Theory, Culture & Society 36, no. 5 (November 18, 2018): 113–31. http://dx.doi.org/10.1177/0263276418807002.

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This article explores the politics of digital protest and emergent forms of sociality in the #NoDAPL (No Dakota Access Pipeline) movement using Elizabeth Povinelli’s concept of geontopower. I begin by situating the concept of geontopower in relation to a range of biopolitical, decolonial, and ecocritical theory in order to show its importance in conceptualizing the interconnectedness of decolonial and environmental interests. I use this theoretical framework to analyze several instances of what I call ‘digital decoloniality’ in the #NoDAPL movement, cases where the particular affordances of social media technologies and the efforts of Indigenous activists and non-Indigenous allies disrupted normative assumptions regarding the boundaries of the digital and ‘analog’ worlds and resisted the geontopolitical structuring of life and nonlife. I argue that the #NoDAPL hashtag works to enact the prerogatives of Western science-based environmentalism and Indigenous epistemological tenets in common, performatively generating new possibilities for conceptualizing social struggle and shared history.
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Legg, John. "Standing with Standing Rock: Voices from the #NoDAPL Movement." Journal of American Ethnic History 40, no. 4 (July 1, 2021): 124–26. http://dx.doi.org/10.5406/jamerethnhist.40.4.0124.

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Privott. "An Ethos of Responsibility and Indigenous Women Water Protectors in the #NoDAPL Movement." American Indian Quarterly 43, no. 1 (2019): 74. http://dx.doi.org/10.5250/amerindiquar.43.1.0074.

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Privott, Meredith. "An Ethos of Responsibility and Indigenous Women Water Protectors in the #NoDAPL Movement." American Indian Quarterly 43, no. 1 (January 2019): 74–100. http://dx.doi.org/10.1353/aiq.2019.a720014.

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Editors, RIAS. "Errata." Review of International American Studies 14, no. 1 (September 30, 2021): 273. http://dx.doi.org/10.31261/rias.11706.

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Erratum for the article: Hoover, Elizabeth. “Fires were lit inside them”. Review of International American Studies, 12 (1/2019), 11-44. https://doi.org/10.31261/rias.7391 The article "The Fires Were Lit Inside Them: The Pyropolitics of Water Protector Camps at Standing Rock" by Elizabeth Hoover, published in the Spring/Summer issue of Volume 12 of RIAS is regretfully missing a citation. Much of the history of the NoDAPL movement on pages 18-19 was drawn from a presentation compiled by Jennifer Weston, a Standing Rock Sioux Tribal member, educator, and language advocate who has been working tirelessly to inform the public about the Standing Rock Dakota Access Pipeline Opposition movement.
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Delaney, Danielle. "Under Coyote’s Mask: Environmental Law, Indigenous Identity, and #NoDAPL." Michigan Journal of Race & Law, no. 24.2 (2019): 299. http://dx.doi.org/10.36643/mjrl.24.2.under.

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This Article studies the relationship between the three main lawsuits filed by the Standing Rock Sioux Tribe, the Cheyenne River Sioux Tribe, and the Yankton Sioux Tribe against the Dakota Access Pipeline (DaPL) and the mass protests launched from the Sacred Stone and Oceti Sakowin protest camps. The use of environmental law as the primary legal mechanism to challenge the construction of the pipeline distorted the indigenous demand for justice as U.S. federal law is incapable of seeing the full depth of the indigenous worldview supporting their challenge. Indigenous activists constantly re-centered the direct actions and protests within indigenous culture to remind non-indigenous activists and the wider media audience that the protests were an indigenous protest, rather than a purely environmental protest, a distinction that was obscured as the litigation progressed. The NoDAPL protests, the litigation to prevent the completion and later operation of the pipeline, and the social movement that the protests engendered, were an explosive expression of indigenous resistance—resistance to systems that silence and ignore indigenous voices while attempting to extract resources from their lands and communities. As a case study, the protests demonstrate how the use of litigation, while often critical to achieving the goals of political protest, distorts the expression of politics not already recognized within the legal discourse.
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Hinzo, Angel M., and Lynn Schofield Clark. "Digital survivance and Trickster humor: exploring visual and digital Indigenous epistemologies in the #NoDAPL movement." Information, Communication & Society 22, no. 6 (February 17, 2019): 791–807. http://dx.doi.org/10.1080/1369118x.2019.1573911.

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Clark, Lynn Schofield, and Angel Hinzo. "Digital Survivance: Mediatization and the Sacred in the Tribal Digital Activism of the #NoDAPL Movement." Journal of Religion, Media and Digital Culture 8, no. 1 (March 20, 2019): 76–104. http://dx.doi.org/10.1163/21659214-00801005.

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To explore the role of contestation in mediatization processes, this article utilizes digital and visual methods to analyze instances of Indigenous digital survivance. Focusing on recent examples at the heart of the #NoDAPL movement allows us to flesh out and argue for a decolonizing approach to the study of mediatization, which we define, following Clark (2011), as the process by which collective uses of communication media (1) extend the development of independent media industries and their circulation of narratives, (2) contribute to new forms of action and interaction in the social world, and (3) give shape to how we think of humanity and our place in the world. The article therefore concludes with suggestions regarding the further development of methodological approaches to studying processes of mediatization in relation to contestations over normative claims and pragmatic concerns regarding the role of media systems in our collective future.
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Casagrande, Gaia, Mohamed Amine Khaddar, and Stefania Parisi. "Technology and the Local Community: Uses of Drones in #NoDAPL Movement and Dandora Dumpsite Storytelling." American Behavioral Scientist 64, no. 13 (August 30, 2020): 1906–20. http://dx.doi.org/10.1177/0002764220952133.

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This article aims to explore the connection between drones and alternative journalistic narratives for local communities. Starting from the frame of digital technologies domestication, we explore how UAVs (Unmanned Aerial Vehicles) could allow mediated practices of mobilization and resistance. By adopting an exploratory approach, we considered two case studies of drone journalism related to specific community issues that share similar characteristics of social inequalities and environmental risks and analyzed the journalistic work by Digital Smoking Signal, related to the #NoDAPL protests, and the African skyCAM reconstruction of the Dandora dumpsite in Kenya. As a result, we are able to show how the appropriation and use of drones can help communities to highlight some underinvestigated social issues. The analysis underlines two different ways of using drone technology to support the local community’s narrative, based on the level of involvement of the journalists in the community cause itself.
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Timmerman, Nicholas A. "Standing with Standing Rock: Voices from the #NODAPL Movement ed. by Nick Estes and Jaskiran Dhillon." American Indian Quarterly 45, no. 2 (2021): 199–201. http://dx.doi.org/10.1353/aiq.2021.0012.

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Dissertations / Theses on the topic "#NoDAPL movement"

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Gaston, Emilia. "Framing a Sacred Fight: Framing Analysis and Collective Identity of the #noDAPL Movement." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703426/.

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The #noDAPL movement was an Indigenous-led environmental social movement occurring between 2015 and 2017, in which the Standing Rock Sioux and other American Indian tribes comprising the Oceti Sakowin garnered support to oppose the 1,172-mile Dakota Access Pipeline. Pipeline opponents agreed that the pipeline's construction posed a threat to the health and safety of tribal members and other residents of the area and that the pipeline's path crossed previously-designated tribal treaty boundaries, compromising tribal sovereignty. In this body of work, I utilize Facebook data from the Sacred Stone Camp Facebook page to locate and identify collective action frames and core framing tasks, adhering to social movement framing theory. Further, I provide insight into the movement's most used collective action frames and how their use enabled to movement to maintain occupation at protest camps along the Missouri River, garner resources from participants and gain international social support. I also draw on concepts of pan-Indianism and supratribalism to discuss indigenous collective identity, as well as concepts like relational values and Indigenous traditional knowledge to better assess the nuances of Indigenous environmental activism and how this movement evoked discussions of modern day settler colonialism.
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Books on the topic "#NoDAPL movement"

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Standing with Standing Rock: Voices from the #NoDAPL Movement. University of Minnesota Press, 2019.

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Standing with Standing Rock: Voices from the #NoDAPL Movement. University of Minnesota Press, 2019.

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Estes, Nick, and Jaskiran Dhillon. Standing with Standing Rock: Voices from the #NoDAPL Movement. University of Minnesota Press, 2019.

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Standing with Standing Rock: Voices from the #NoDAPL Movement. University of Minnesota Press, 2019.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Verso Books, 2019.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Verso, 2021.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Verso Books, 2023.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Tantor Audio, 2019.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Verso, 2019.

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Our History Is the Future: Standing Rock Versus the Dakota Access Pipeline, and the Long Tradition of Indigenous Resistance. Haymarket Books, 2024.

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Book chapters on the topic "#NoDAPL movement"

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Shearer, Tobin Miller. "Prayers permeated: water protectors and the #NoDAPL movement." In Religion and Social Protest Movements, 142–64. Abingdon, Oxon ; New York, NY : Routledge, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9781315102542-6-7.

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Gogoi, Aparajita, Mercy Manoranjini, and Rohini Banerjee. "The Impact of COVID-19 on Adolescents, Nodal Teachers, and Frontline Workers." In Global Perspectives of COVID-19 Pandemic on Health, Education, and Role of Media, 233–47. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1106-6_10.

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AbstractAdolescence is a critical developmental period that has the power to shape an individual’s dreams and future. Young people have been severely impacted by the COVID-19 pandemic. Closure of schools and non-formal education deprived them of learning opportunities and also of social engagement with their peers and educators. Prolonged lockdowns/closures and movement restrictions led to additional emotional and mental unrest and anxiety. Adolescents and youth, especially adolescent girls and young women, experienced higher levels of violence due to quarantine and isolation. The authors discuss the effects of these ground realities on access to health services and education during the COVID-19 lockdowns. They highlight important issues and make recommendations for policy dialogue and advocacy around critical areas like vulnerability to COVID-19 infection, physical abuse, limited access to mobile phones, disruption of supply chains, adolescent-friendly counseling, dealing with violence, early marriage, school drop-outs, and trafficking. Recommendations are made to decision-makers and program implementers for addressing barriers to access timely and appropriate care.
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Parkhurst, Nicholet A. Deschine. "2. From #Mniwiconi to #StandwithStandingRock: How the #NoDAPL Movement Disrupted Physical and Virtual Spaces and Brought Indigenous Liberation to the Forefront of People’s Minds." In Indigenous Peoples Rise Up, 32–47. Rutgers University Press, 2021. http://dx.doi.org/10.36019/9781978808812-003.

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Okada, Yasushi, and Nobutaka Hirokawa. "Observation of Nodal Cilia Movement and Measurement of Nodal Flow." In Methods in Cell Biology, 265–85. Elsevier, 2009. http://dx.doi.org/10.1016/s0091-679x(08)91014-1.

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Kim, Jihoon. "New Social Movements and Alternative Media Practices." In Activism and Post-activism, 88–124. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/oso/9780197760413.003.0004.

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Abstract This chapter maps out an array of documentaries that engage feminist and LGBTQ movements and environmental activism as two noticeable twenty-first-century social movements that also attest to the coalition of tajung (multitude), a group of diverse subjects who differ in class, occupation, culture, gender, and sexual orientation but who share common interests, in contrast to minjung in the 1980s mass democratization movement premised on a unilateral class consciousness. It also explains alternative journalism documentary, migratory-grassroots activism, and issue-based omnibus documentary as innovations in the activist tradition of Korean documentary cinema in the context of twenty-first-century Korea, including the Candlelight Protests and the Sewol Ferry Disaster, which functioned as their common nodal point.
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Narahari, S. R., Madhur Guruprasad Aggithaya, and Terence J. Ryan. "Advances in Understanding the Use of Yoga as Therapy in Lymphedema." In Handbook of Research on Evidence-Based Perspectives on the Psychophysiology of Yoga and Its Applications, 263–82. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3254-6.ch015.

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Lymphedema may be caused by dysfunction of the lymphatic system due to damage, block, hypoplasia due to genetic causes or by lymph overload. Lymphatic Filariasis is most prevalent and among the leading causes of disability. This chapter describes the improvements in three yoga protocols of integrative treatment, for lower limb, upper limb, and genital lymphedema. There are two sessions of yoga in our treatment protocol. Yoga helps to drain lymph through various mechanisms. Asanas focus on the dermal stretch, joint movement, muscle pumps, and muscle stretch and pranayamas on lung expansion. Joint movements and muscle contractions are designed to mimic nodal drainage. The yoga protocol also provides knee strengthening, gait correction, shoulder joint strengthening. Yoga asanas for comorbidities like hypertension, cardiovascular diseases, and arthritis and joint surgeries with movement restrictions are customized in the revised protocol. Yoga is an effective treatment in lymphedema and considerably improves the patient's quality of life.
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Narahari, Saravu, Madhur Guruprasad Aggithaya, and Terence J. Ryan. "Research-Based Applied Psychophysiology." In Research-Based Perspectives on the Psychophysiology of Yoga, 241–62. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-2788-6.ch014.

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The lymphedema is a disfiguring and disabling disease caused by dysfunction of lymphatic system due to damage/block or by lymph overload. Breast Cancer Related Lmyphedema and elephantiasis due to Lymphatic Filariasis are most prevalent world over. This chapter describes the yoga protocols used as a part of integrative medicine treatment, to treat lymphedema. Patients perform yoga in two sessions. It includes warm up, breathing, prolonged exercise with appropriate rests and relaxation. Yoga helps to drain lymph though various mechanisms. Asanas focus on dermal stretch, joint movement, muscle pumps and muscle stretch and pranayamas on lung expansion. Yoga also provides knee strengthening, gait correction and improves shoulder movement. Joint movements and muscle contractions are designed to mimic nodal drainage. Yoga sequence is arranged to achieve a similar role of manual lymph drainage as that of Foldi's Complex Decongestive Therapy. Yoga as a self-care in lymphedema is an effective treatment in endemic communities albeit not supported by randomized controlled trials.
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Narahari, Saravu, Madhur Guruprasad Aggithaya, and Terence J. Ryan. "Research-Based Applied Psychophysiology." In Complementary and Alternative Medicine, 492–515. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7039-4.ch023.

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The lymphedema is a disfiguring and disabling disease caused by dysfunction of lymphatic system due to damage/block or by lymph overload. Breast Cancer Related Lmyphedema and elephantiasis due to Lymphatic Filariasis are most prevalent world over. This chapter describes the yoga protocols used as a part of integrative medicine treatment, to treat lymphedema. Patients perform yoga in two sessions. It includes warm up, breathing, prolonged exercise with appropriate rests and relaxation. Yoga helps to drain lymph though various mechanisms. Asanas focus on dermal stretch, joint movement, muscle pumps and muscle stretch and pranayamas on lung expansion. Yoga also provides knee strengthening, gait correction and improves shoulder movement. Joint movements and muscle contractions are designed to mimic nodal drainage. Yoga sequence is arranged to achieve a similar role of manual lymph drainage as that of Foldi's Complex Decongestive Therapy. Yoga as a self-care in lymphedema is an effective treatment in endemic communities albeit not supported by randomized controlled trials.
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Nedaei, Mahnaz. "New Insights into Major Seismic Events by Coulomb Stress Change Pattern and Aftershock Distributions – Implication for Active Tectonics." In Natural Hazards - New Insights [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110728.

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Identification of the fault plane of earthquakes can be a critical contribution of seismology to regional tectonic studies and assessment of expected deformation and damage patterns. A fundamental ambiguity in the representation of an earthquake with a focal mechanism is to recognize the causative fault plane accommodating the slip during the event among the two nodal planes. The Coulomb static stress has been commonly used to determine the stress distribution induced by an event. However, for the first time in this research, the Coulomb regional stress was resolved on nodal planes to realize the optimally oriented plane for failure having maximum Coulomb stress on which the regional stress triggers an event. The method has been conducted for the April 5th, 2017 Sefidsang earthquake in NE Iran. The results reveal that the earthquake-triggering fault is a northeast-dipping listric fault with dextral reverse movement. The identified structural aspects subjected to active deformation in the area have crucial implications for seismic hazard assessment of the region and potential future failure areas.
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Creswell, Robyn. "Lebanon and Late Modernism." In City of Beginnings, 21–51. Princeton University Press, 2018. http://dx.doi.org/10.23943/princeton/9780691182186.003.0002.

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This chapter emphasizes the importance of Beirut in conditioning the historical and intellectual emergence of the modernist poetry movement, not only because of the city's suddenly central and yet anomalous place in the intellectual life of the Arab world, but also for its nodal position in the global history of modernism during the early Cold War. It focuses on the antagonistic nature of intellectual exchanges during the period, particularly as seen in literary magazines and journals of opinion. If, as Robert Scholes and others have argued for the European case, “modernism begins in the magazines,” then the same is profoundly true of the Arabic movement. Intellectual life in Beirut was not so much a playground as a battleground, and this war of position extended beyond the borders of Lebanon. The debates between local intellectuals—nationalist, Marxist, and liberal—reflect the global agon between the main ideological camps of the early Cold War.
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Conference papers on the topic "#NoDAPL movement"

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Zhang, Tengfei, Hongchun Wu, Youqi Zheng, Liangzhi Cao, and Yunzhao Li. "Development of REFT Code System for the Analysis of Highly Heterogeneous Research Reactors." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30950.

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As an effort to enhance the accuracy in simulating the operations of research reactors, a fuel management code system REFT was developed. Because of the possible complex assembly geometry and the core configuration of research reactors, the code system employed HELIOS in the lattice calculation to describe arbitrary 2D geometry, and used the 3D triangular nodal SN method transport solver, DNTR, to model unstructured geometry in the core analysis. Flux reconstruction with the least square method and micro depletion model for specific isotopes were incorporated in the code. At the same time, to make it more user friendly, a graphical user interface was also developed for REFT. In the analysis of the research reactors, the calculations involving the control rod movement are encountered frequently. The modeling of the control rods differential worth behavior is important in that the movement of the control rod may introduce variations on the reactivity. To handle the problem two effective ways of alleviating the control rod cusping effect are recently proposed, based on the established code system. The methodologies along with their application and validation will be discussed.
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Guthrie, Richard, and Emma Reid. "Estimating Landslide Induced Probability of Failure to Pipelines Using a Structured Reductionist Approach." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78157.

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Much of North America, and indeed much of the global landscape, is comprised of either locally or regionally steep slopes, river valleys, and weak or unstable geology. Landslides and ground movements continue to impact pipelines that traverse these regions. Pipeline integrity management programs (IMP’s) are increasingly expecting quantitative estimates of ground movement or pipe failure as part of pipeline risk management systems. Quantitative analysis usually relies on one or more of statistics, physical models, and expert judgment. Statistics incorporate ground and pipe behavior (for hazard and vulnerability respectively) over a broad area to infer local probabilities. They carry the weight of big data, but the local application is almost certainly incorrect (variability even for regions exceeds 2 orders of magnitude). Detailed geotechnical (hazard) and soil-pipe interaction and stress (vulnerability) models provide rigorous results, but require substantial effort and/or expert judgment to parameterize the inputs and boundary conditions. We present herein a structured tool to calculate probability of failure (PoF) using expert judgment supported by known, instrumented or observable conditions and statistics (where available). We provide a series of tables used as a basis for nodal calculations along a branch path of a decision tree, and discuss the challenges and results from actual application to over 100 sites in the Interior Plains. The method is intended to be a practical informative approach based on, and limited by, data inputs. It is a flexible fit for purpose assessment that takes advantage of the best available data, however, the method relies on the user to articulate a level of confidence in, or the basis of the results.
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Barbely, Natasha L., Sorin I. Pirau, and Narayanan M. Komerath. "Measurements of Wall Formation Forces in an Acoustic Resonator." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63307.

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Acoustic or electromagnetic shaping in resonators can form thin walled structures from pulverized materials. The technology is applicable to a wide variety of materials, particle shapes, and sizes. While radiation force models adequately capture the transport of particles towards the nodal surfaces where walls form, the actual wall formation process involves complex particle-field and interparticle forces. A finite element computation is used along with pulsed laser particle image velocimetry for air movement, and particle tracking velocimetry for particle movement, to close the gap between predictions and measurements. Non-intrusive force measurement is attempted by deriving the acceleration field of particles, from velocity field data. Results are compared with particle acceleration computed from velocity calculations using the finite element code. The predicted acoustic velocity field from the standing wave pattern in the resonator, is compared with measurements. The difference between the computed particle velocity and the acoustic velocity is used to assess the relative roles of fluid dynamic drag and radiation forces on the acceleration of the particles. The measured particle acceleration does differ substantially and consistently from the computed values, showing the effect of the unmodeled near-field particle-field interaction forces.
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Singh, P. J. "Gas Deliverability Monitoring and Reserves Quantification without Shut-In the Well: Application of Coupled Material Balance - Nodal Analysis Approach in Main Zone of Tunu Field, Mahakam." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-e-127.

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The classical Material Balance (P/Z) plot requires fully shut-in built-up reservoir pressure (Pr) for its calculation by generating static Pr as a function of cumulative gas production (Gp). Shut-in the well only for Pr data acquisition is impractical and creates several issues such as risk of production loss and production disturbance. Mattar & McNeil (1997) introduced Flowing Material Balance approach for gas deliverability monitoring and reserves estimation based on surface well flowing parameter by creating parallel line through the initial Pr to estimate Initial-Gas-In-Place (IGIP). The method is practical for qualitative purpose, but any dynamic behavior of the well will be challenging. Improved model is presented, a Coupled Material Balance - Nodal Analysis approach for gas deliverability monitoring and reserves quantification of connected gas in place volume (CGIP). Initial Pr as a known variable then extended by the decline of Pr as a function of Gp and improved by performing “flowing mode” Nodal Analysis, converting bottom hole flowing pressure from wellhead flowing pressure to determine estimated Pr. Pr uncertainty and its depletion could be identified by sensitivity analysis, such as inflow productivity and water encroachment evolution. This approach has been applied for well T-32 of Tunu field, a mature field in Mahakam, to perform as single-reservoir gas deliverability monitoring by using only flowing parameter data. The “flowing” mode of Pr estimation with actual Gp, gives good performance of CGIP estimation without any shut-in activities, since this well is one of the big gas producer. This model also handled the dynamic activities of operation: well movement, production curtailment and improvement. The unknown variable of continuous water encroachment is also handled by wellbore temperature model which justified with actual data. This improved model could be considered as an alternative approach for gas reserves quantification and gives advantage for production strategy.
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Wang, Pengfei, Huawei Fang, Zhao Wang, Shoujun Yan, Jiashuang Wan, and Fuyu Zhao. "Development of a Fast Simulation Program for AP1000 Reactor With Application of Mechanical Shim (MSHIM) Control Strategy and Nodal Method." In 2014 22nd International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icone22-30373.

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The Mechanical Shim (MSHIM) core control strategy makes use of two independently controlled rod groups to provide fine control of both core reactivity and axial power distribution. This paper presents a reactor core fast simulation program (RCFSP) for AP1000 using MATLAB/SIMULINK. A nodal core model including xenon iodine dynamics is used to describe the core thermal power transient with the two group neutron diffusion equation for neutron kinetics modeling and an integral method for thermal-hydraulic calculation. Two closed loop rod controllers with implementation of the MSHIM core control strategy are developed to modulate the insertion of control rods. Based on the developed RCFSP, the MSHIM load follow operations with the original and revised MSHIM control strategies and two typical MSHIM load regulation operations with ten-percent step load change and five-percent per minute ramp load change are simulated. Results of these MSHIM operations demonstrate that the core reactivity and axial power distribution can be well-controlled via automatic rod control only. It has also been demonstrated that the MSHIM capabilities provided by the original MSHIM strategy are not diminished by the revised one. Moreover, the M-bank insertion for the original strategy is much deeper than that for the revised one. Thus, the power distribution perturbations associate with the M-bank movement for the revised strategy are not as pronounced as those for the original one during load change transients, which helps to alleviated peaking factor concerns associated with the control rod insertion. In view of its accuracy, simplicity and fast computation speed, the developed RCFSP can be used for dynamic simulations and control studies of the AP1000 reactor with application of MSHIM control strategy. With the adoption of modular programming techniques, the RCFSP code can be easily modified and applied to other pressurized water nuclear reactors that employs separate, independent control rod banks for respectively controlling core reactivity and axial offset within corresponding deadbands.
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Andreev, F. B., F. Thouverez, A. M. Gouskov, and L. Blanc. "Stability Study of a Bladed Disk in Interaction With a Casing via a Labyrinth Seal." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25954.

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In this paper a simplified coupled model of a bladed disk and flexible stator developed in a rotating frame is introduced. The interaction between the rotating and stationary parts is adjusted using the gas flow in the straight-through labyrinth seal located on the tip of the blades. This is therefore an “aero elastic contact” problem. An energy-based method is used to express the equations of motion. The computation of eigenvalues provides the Campbell diagram and information on stability. A single-control-volume analysis is performed to predict the destabilizing force exerted by the labyrinth seal. In terms of strategy a simpler and efficient model with a rigid rotating shaft is compared with models found in the literature before the complete rotor-stator aero elastic contact study is presented. This is followed by a study of the interaction between the bladed disk with a labyrinth seal and the flexible stator. The model proposed provides a new approach to modelling rotor systems with labyrinth seals. The stator is then modelled as a flexible body and the rotor as a bladed disk. It is shown in the example described that the stability of the system depends on the rigid body movement of the stator and is independent of its nodal diameter modes.
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Hamper, Martin B., Khaled E. Zaazaa, and Ahmed A. Shabana. "Development of the Finite Segment Method for Modeling Railroad Track Structures." In 2011 Joint Rail Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/jrc2011-56099.

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In the finite segment method, the dynamics of a deformable body is described using a set of rigid bodies that are connected by elastic force elements. This approach can be used, as demonstrated in this investigation, in the simulation of some rail movement scenarios. The purpose of this investigation is to develop a new track model that combines the absolute nodal coordinate formulation (ANCF) geometry and the finite segment method. The ANCF finite elements define the track geometry in the reference configuration as well as the change in the geometry due to the movement of the finite segments of the track. Using ANCF geometry and the finite segment kinematics, the location of the wheel/rail contact point is predicted online and used to update the creepage expressions due to the finite segment displacements and rotations. The location of the wheel/rail contact point and the updated creepage expressions are used to evaluate the creep forces. A three-dimensional elastic contact formulation (ECF-A), that allows for wheel/rail separation, is used in this investigation. The rail displacement due to the applied loads is modeled by a set of rigid finite segments that are connected by set of spring-damper elements. Each rail finite segment is assumed to have six rigid body degrees of freedom. The equations of motion of the finite segments are integrated with the railroad vehicle system equations of motion in a sparse matrix formulation. The resulting dynamic equations are solved using a predictor-corrector numerical integration method that has a variable order and variable step size. As shown in this paper, the finite segments may be used to model specific phenomena that occur in railroad vehicle applications, including rail rotations and gage widening. The procedure used in this investigation to implement the finite segment method in a general purpose multibody system (MBS) computer program is described. Four simple models are presented in order to demonstrate the implementation of the finite segment method in MBS algorithms. The limitations of using the finite segments approach for modeling the track structure and rail flexibility are also discussed.
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Mohammadi, Narges, and José Luis Escalona. "Dynamic Simulation of Reeving Systems With the Extension of the Modal Approach in the Axial Direction." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-71078.

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Abstract In this work, the simulation of reeving systems has been studied by including axial modes using the Arbitrary Lagrangian-Eulerian (ALE) description. The reeving system is considered as a deformable multibody system in which the rigid bodies are connected by the elastic wire ropes through sheaves and reels. A set of absolute nodal coordinates and modal coordinates is employed to describe the motion and deformation in the axial direction. This new method allows the analysis of elements with non-constant axial strain along its length. In addition, modal coordinates are employed to describe the dynamic motion in the transverse direction. The non-constant axial displacement within the wire rope is computed in terms of the absolute position coordinates, longitudinal material coordinates, and modal deformation coordinates. To derive the governing equations of motion, Lagrange’s equation is employed. The formulation is validated for a simple pendulumlike motion actuated by an initial velocity. The simulation results are provided to trace the movements of the payload. It can be seen that by adding modal coordinates, the axial force within the element changes. Moreover, the effects of modal coordinates in the axial direction are presented for a different number of nodes, and the resulting axial forces are compared with reference solution.
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Gabriela Ene, Alexandra, Carmen Mihai, and Constantin Jomir. "Prototyping of the experimental lifting parachute system." In AHFE 2023 Hawaii Edition. AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1004306.

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Aquatic accidents and incidents due to the hydro-meteorological conditions or to the carelessness of the crew (that can generate failures and collisions between ships), the research of the wrecks and of the lifting of various archaeological, speleological, ecological, geological underwater objects, require the usage of the lifting parachute that represents an extremely useful equipment in these situations.The paper presents the prototyping of the dispensable and executable system including the description of the working environment represented by the fluid medium which can be used as a basis for formulating the requirements imposed for: i) product development (type-dimensions, engineering characteristics, raw material, maximum working depth, object weight flushed), and ii) operation in blue water (open sea where there are no visual reference points to determine the positioning in the water column, and where depth monitoring and strict buoyancy control are needed).From a mathematical point of view, it was considered that, in a marine or oceanic wave, as the depth increases, the circular movement of the fluid particles on the surface transforms and their movement could be described by a set of hyperbolic differential equations.The values of the total force necessary to raise the "wreck" to the surface were determined as a function of the: i) weight of the outside and inside deposits, ii) adhesion force on the bottom of the water, iii) theoretical lift capacity and actual lift capacity. It was demonstrated that for a parachute of a certain shape, with dimensions of 55cm x 55 cm, at a pressure of 8 bar, the maximum weight that can be lifted to the surface is 15,000 kgf. In addition, the following specific coefficients for the aquatic systems design were considered: coefficient of floating area: 0.84; block coefficient: 0.652; belt convergence coefficient: 1.03, etc.The system thus developed was tested with the help of a specialized software, based on the following working assumptions: the medium is continuous, so the mass distribution is continuous in the analysed volume; the infinitesimal internal forces in the environment are considered average statistical values of the interaction forces between the constituent elements; the environment is loaded with concentrated forces Fi and distributed loads pi. These input data enabled to evidence the deformations under the effect of dynamic pressure, Von Misses nodal values, the distribution of displacement vectors and errors. The same set of input data will be used for testing the system under real conditions of usage.
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Jäger, Florian, Ferhat Kaptan, Lars Panning-Von Scheidt, and Jörg Wallaschek. "Development of a Multi-Shaker-Control to Investigate the Influence of the Interblade Phase Angle on Frictionally Damped Turbine Blades." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-59272.

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Abstract Constructive damper concepts are developed and integrated in turbomachinery to reduce vibration amplitudes generated by dynamic loads. The potential damping effectiveness of friction-based damper concepts is strongly dependent on the relative motion between adjacent blades, besides other factors such as normal force. In cyclic symmetric structures the phase difference is determined by the excited nodal diameter, which leads to different damper movements and efficiencies for given mode shapes. Several studies on the investigation of the damper performance of different underplatform damper geometries have been carried out on non-rotating test stands consisting usually of two blades in order to reduce the experimental effort before setting up rotational tests. Based on the existing modes of the two blades and the application of commonly just one shaker, the investigations are limited to the in-phase and out-of-phase modes. In this paper an experimental approach is developed to reduce the gap of transferability between non-rotating and rotational tests to analyze the effects of a variable interblade phase angle on the damping effect of underplatform dampers. For this purpose, a cascaded control system using two shakers is being developed to control the force amplitudes and the phase difference between the response of the two blades. The control algorithm is designed in a model-based way by using a two degrees of freedom oscillator with friction contact and is subsequently integrated in the non-rotating test stand.
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