Academic literature on the topic 'Resilience wheel'
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Journal articles on the topic "Resilience wheel"
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Secu, Cristian Vasilică, Dan Cristian Lesenciuc, Ionuț Vasiliniuc, Gabi Zaldea, Ancuța Nechita, and Lulu Cătălin Alexandru. "Determining Attribute—Response Relationships of Soils under Different Land Uses: A Case Study." Land 12, no. 9 (2023): 1750. http://dx.doi.org/10.3390/land12091750.
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Soil researchers are interested in a gaining better understanding of the soil system state by analyzing its properties and their dynamics in time as well as in relation to land use change. Tilled, abandoned, and forest soils were assessed regarding attribute–response relationships for the bulk density (BD), total porosity (TP), volumetric moisture (θv), and penetration resistance (PR) with the use of the interquartile ratio (IRI) integrated into a resilience formula and Shannon entropy indices. The IRI results differentiated soil properties according to agrotechnics (wheel track vs. between wheels) and the state of the system (tilled vs. abandoned vineyard). Entropy (En) indicated a high level of uncertainty for PR. The linear regression applied to the pairs of BD-TP, TP-θv, and PR-θv showed better results for the IRI weight (IRIweight) compared to the entropy weight (Enweight) for the soil between the wheels. The soil of the abandoned vineyard showed a faster tendency toward resilience that was more pronounced in the tilled wheel tracks than in the area between the wheels. The IRI can thus be an alternative to entropy in the evaluation of the response of some soil properties according to their use. When integrated into a resilience formula, the IRI can estimate the dynamics of soil properties for abandoned land compared to reference soil.
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Li, Yan, and Sukol Ariyasajsiskul. "Construction of Outdoor Adventure Education Courses to Develop Psychological Resilience for University Students." International Journal of Sociologies and Anthropologies Science Reviews 3, no. 6 (2023): 261–74. http://dx.doi.org/10.60027/ijsasr.2023.3479.
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Background and aims: Most schools only pay attention to the cultivation of students' bodies, knowledge, and skills, but neglect the development and training of university students' psychological skills. When university students exhibit some psychological problems, often will be given to students' mental health education centers to solve, due to the student's mental health education center teachers and the site being more limited. This study aims to evaluate the impact of outdoor adventure education courses on the psychological resilience of university students. Materials and methods: The researchers used an experience-based learning circle model, incorporating The Resiliency Wheel, Full value contracts, and guidance techniques. Using quantitative studies, interviews, and experimental data, participants were divided into two groups: the experimental group and the control group. The effect of the adventure education course as an 8-week intervention was studied using the psychological resilience Scale. Data were analyzed using a t-test and one-way ANOVA. The experimental group scored higher than the control group in the total scores of psychological resilience and the three components (tenacity, strength, optimism), and these results were statistically significant. Further, the experimental group shows marginal positive changes in the total resilience scale and its three dimensions in terms of effect size. The designed adventure education courses significantly improve the psychological resilience of university students. Results: The results found that the psychological resilience level of university students was significantly improved after the intervention, and the scores in the dimensions of tenacity, strength, and optimism significantly increased after the intervention. through the research of this paper, we can expand the analytical perspective of psychological resilience and provide a new way of thinking for the improvement of the psychological resilience of university students. Conclusion: The content of previous interventions on psychological resilience and the factors affecting psychological resilience, applying the concept of the psychological resilience wheel to this course, And the full value contract, guide technology, and outdoor adventure education courses are fully combined and designed.
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Fuller, Ian C., Dave J. Gilvear, Martin C. Thoms, and Russell G. Death. "Framing resilience for river geomorphology: Reinventing the wheel?" River Research and Applications 35, no. 2 (2019): 91–106. http://dx.doi.org/10.1002/rra.3384.
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Zhu, Lida, Juan Wang, Christina Pettan-Brewer, Warren Ladiges, and Jorming Goh. "Wheel running predicts resilience to tumors in old mice." Pathobiology of Aging & Age-related Diseases 9, no. 1 (2019): 1676104. http://dx.doi.org/10.1080/20010001.2019.1676104.
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Malyukov, Yury A. "FUZZY ANALYSIS OF “DAISY WHEEL OF RELATIONSHIPS” ORGANIZATION." EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA 8/3, no. 139 (2023): 140–45. http://dx.doi.org/10.36871/ek.up.p.r.2023.08.03.015.
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In this article, we trace the relationship between the quality of the company’s relational model and its economic resilience. Zade linguistic variables are used to assess the quality of relationships between companies and their stakeholders. The quality of relationships is linked to stakeholder satisfaction based on the principle of minimum quality (the bottleneck). In turn, a linguistic matrix is used to analyze stability based on information on relationship quality. The article demonstrates the technique of evaluating economic resilience based on relationship quality data using a simple example. The complexity of the presented model should be accompanied by an expansion of the range of measures using matrix aggregate calculator (MAC) technology. The relationship model between quality and stability can be loaded into a balanced organization performance system and tracked regularly (e.g., based on management reporting).
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Krykavskyy, Yevhen, Nataliya Chornopyska, Oksana Dovhun, Nataliya Hayvanovych, and Sofiya Leonova. "Defining supply chain resilience during wartime." Eastern-European Journal of Enterprise Technologies 1, no. 13 (121) (2023): 32–46. http://dx.doi.org/10.15587/1729-4061.2023.272877.
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Russia's full-scale military invasion of Ukraine led to the occupation of a large part of the territory of Ukraine, active warfare in the East and South parts of Ukraine, activation of military logistics, rapid development of humanitarian logistics. At the same time, non-kinetic warfare, destruction of functional society, attack on the logistics infrastructure and supply chain disruptions are observed. Civil Logistics and Supply Chains acquired the specifics of working in wartime conditions – constant danger, brittle, anxious, nonlinear, incomprehensible. The following two research questions were asked in the paper. First – how was it possible to ensure the functioning of the supply chains, overcoming logistics obstacles. Second – how are the events unfolding and what strategic consequences will the war have for Ukraine's logistics landscape. To answer the first research question, the focus group method was used (the representativeness of which was ensured by top managers of logistics companies). The answer to the second research question was obtained by the method of summarizing and systematizing figures and facts about the events that have a direct impact on the logistics industry of Ukraine, supplemented by the method for graphical visualization of research results – Futures-Wheel. As a result, the highlighted strategies that were used in managing supply chains when facing logistics obstacles caused by war can potentially be useful in other crises. Futures-Wheel presents an overall picture of the impact of war on the logistics landscape of Ukraine as well as a vision of the future
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Yevhen, Krykavskyy, Chornopyska Nataliya, Dovhun Oksana, Hayvanovych Nataliya, and Leonova Sofiya. "Defining supply chain resilience during wartime." Eastern-European Journal of Enterprise Technologies 1, no. 13(121) (2023): 32–46. https://doi.org/10.15587/1729-4061.2023.272877.
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Russia's full-scale military invasion of Ukraine led to the occupation of a large part of the territory of Ukraine, active warfare in the East and South parts of Ukraine, activation of military logistics, rapid development of humanitarian logistics. At the same time, non-kinetic warfare, destruction of functional society, attack on the logistics infrastructure and supply chain disruptions are observed. Civil Logistics and Supply Chains acquired the specifics of working in wartime conditions – constant danger, brittle, anxious, nonlinear, incomprehensible. The following two research questions were asked in the paper. First – how was it possible to ensure the functioning of the supply chains, overcoming logistics obstacles. Second – how are the events unfolding and what strategic consequences will the war have for Ukraine's logistics landscape. To answer the first research question, the focus group method was used (the representativeness of which was ensured by top managers of logistics companies). The answer to the second research question was obtained by the method of summarizing and systematizing figures and facts about the events that have a direct impact on the logistics industry of Ukraine, supplemented by the method for graphical visualization of research results – Futures-Wheel. As a result, the highlighted strategies that were used in managing supply chains when facing logistics obstacles caused by war can potentially be useful in other crises. Futures-Wheel presents an overall picture of the impact of war on the logistics landscape of Ukraine as well as a vision of the future
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Ma, Xiaochuan, Ping Wang, Jingmang Xu, and Rong Chen. "Effect of the vertical relative motion of stock/switch rails on wheel–rail contact mechanics in switch panel of railway turnout." Advances in Mechanical Engineering 10, no. 7 (2018): 168781401879065. http://dx.doi.org/10.1177/1687814018790659.
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In order to enable the vehicle to change among the tracks, the stock and switch rails are separated and provided with different rail resilience levels on the baseplate in the railway turnout switch panel. Therefore, there will be vertical relative motion between stock/switch rails under wheel loads, and the relative motion will change the combined profile of stock/switch rails and consequently affect the wheel–rail contact mechanics. A method is developed in this article to investigate the effect of the relative motion of stock/switch rails on the wheel–rail contact mechanics along the railway turnout switch panel. First, the possible rigid wheel–rail contact points, called primary and secondary stock/switch rail contact points, are calculated based on the trace line method; second, the actual contact points are determined by the presented equations; finally, the distribution of wheel–rail contact forces on the stock/switch rails is obtained based on the continuity of interface displacements and forces. A numerical example is presented in order to investigate the effect of the relative motion of stock/switch rails on the wheel–rail contact points, stresses, and forces, and the results are presented and discussed.
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Chowdhury, Tara G., Gauri S. Wable, Yi-Wen Chen, et al. "Voluntary Wheel Running Exercise Evoked by Food-Restriction Stress Exacerbates Weight Loss of Adolescent Female Rats But Also Promotes Resilience by Enhancing GABAergic Inhibition of Pyramidal Neurons in the Dorsal Hippocampus." Cerebral Cortex 29, no. 10 (2018): 4035–49. http://dx.doi.org/10.1093/cercor/bhy283.
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Abstract Adolescence is marked by increased vulnerability to mental disorders and maladaptive behaviors, including anorexia nervosa. Food-restriction (FR) stress evokes foraging, which translates to increased wheel running exercise (EX) for caged rodents, a maladaptive behavior, since it does not improve food access and exacerbates weight loss. While almost all adolescent rodents increase EX following FR, some then become resilient by suppressing EX by the second–fourth FR day, which minimizes weight loss. We asked whether GABAergic plasticity in the hippocampus may underlie this gain in resilience. In vitro slice physiology revealed doubling of pyramidal neurons’ GABA response in the dorsal hippocampus of food-restricted animals with wheel access (FR + EX for 4 days), but without increase of mIPSC amplitudes. mIPSC frequency increased by 46%, but electron microscopy revealed no increase in axosomatic GABAergic synapse number onto pyramidal cells and only a modest increase (26%) of GABAergic synapse lengths. These changes suggest increase of vesicular release probability and extrasynaptic GABAA receptors and unsilencing of GABAergic synapses. GABAergic synapse lengths correlated with individual’s suppression of wheel running and weight loss. These analyses indicate that EX can have dual roles—exacerbate weight loss but also promote resilience to some by dampening hippocampal excitability.
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Luzaan, Schlebusch, Schlebusch Gawie, and Lineo Matjeane. "Fostering Resilience in South African Township Primary School Teachers." International Journal of Learning, Teaching and Educational Research 22, no. 5 (2023): 58–73. http://dx.doi.org/10.26803/ijlter.22.5.3.
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Resilience is needed for township teachers to overcome their stressful classroom and school environment. The main objective of this paper is to examine the role of teacher resilience in enabling them to respond positively to challenges they encounter. To address these challenges, the study explored the fostering of resilience in township primary school teachers in the Lejweleputswa District of the Free State Province in South Africa. A qualitative approach was followed as it allowed the researchers to gather the necessary in-depth data based on the opinions, experiences, and beliefs of the participants. The sample of the study consisted of two principals, two heads of department, and thirty-three teachers from two township primary schools. Data were collected through semi-structured interviews and open-ended questionnaires. The study's major findings revealed that the most common challenges adversely affecting teachers’ resilience were a lack of teaching and learning resources, a negative work atmosphere, and overcrowded classes. The study recommends that the fostering of resilience should be brought about by school management teams (SMT) implementing the Resilience Wheel model in support of teachers’ resilience regardless of the challenges they faced.
Dissertations / Theses on the topic "Resilience wheel"
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Dareeju, Biyanvilage. "Performance evaluation of unsaturated rail track foundations under cyclic moving wheel load." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/102697/4/Biyanvilage%2520Sampath%2520Sri%2520Sameera_Dareeju_Thesis.pdf.
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This thesis developed an alternative laboratory element testing method to evaluate the response of the unsaturated soils of rail track foundations under repeated moving wheel loadings. The novel laboratory testing method is more capable of producing the realistic strength-deformation characteristics of the unsaturated soils with the effects of principal stress axis rotation (PSAR), which can be used to redesign the conservative rail track guidelines.
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Jayakody, Arachchige Shiran Pradeep. "Investigation on characteristics and performance of recycled concrete aggregates as granular materials for unbound pavements." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/78131/1/Shiran%20Pradeep_Jayakody%20Arachchige_Thesis.pdf.
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This research was a step forward in investigating the characteristics of recycled concrete aggregates to use as an unbound pavement material. The results present the guidelines for successfully application of recycled concrete aggregates in high traffic volume roads. Outcomes of the research create more economical and environmental benefits through reducing the depletion of natural resources and effectively manage the generated concrete waste before disposal as land fill.
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Zago, João Paulo. "Estudo da deformação permanente de três solos típicos de subleitos rodoviários de Santa Maria - RS." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/12036.
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Studies conducted in 2016 show that 58% of the highways in Brazil presents any
deficiency in the pavement, signaling or in its geometry. These deficiencies are, on
average, the cause for about 6% of the accidents and for the increase of the
operational cust by 91,6%. Among them we can stress the permanent deformation,
the so called wheel tracks, which is harmful to the dynamic of the loads, to the
comfort provided by the pavement, increasing its risk. To the correct design of the
pavement it is very important to better know the characteristics of the materials to be
used. In this context, stands out the subgrade, the foundation for the whole structure
of the pavement, which one is studied in the present reseach by considering three
typical soils used as highway subgrade in Santa Maria, Rio Grande do Sul State, and
having the permanent deformations as the main focus. The metodology aplied in this
work consisted in the location, sampling and characterization of the soil fields, lab
tests and empirical machanistic design. Besides the physical, chemical and
mechanical characterizations, it was performed the repeated triaxial load test aiming
to obtain the resilient modulus and the permanent deformation parameters, according
to the Brazilian Petroleum Corporation Manual (PETROBRAS). The Resilient
Modulus model presented the better results with frequencies of 1 Hz and 2 Hz, and
the presence of silt in one of the soils affected its resilient behaviour. The permanent
deformation tests were performed with the frequency of 2 Hz and 150.000 load
cicles. The average statistic correlation, according to Guimaraes (2009)´s
methodology, was 0.91, bigger than the one provided by the Monismith and
Barksdale´s models. However, the dominance of fine grained soils, along with low
compactation energy, lead to a higher deformation rates, motivating the use of
intermediate energy. With this new approach the permanent deformation was
reduced 40% and the resilient modulus increased 78,8%. However, the numerical
simulation according to the mechanistic approach, and using the layer thickness
obtained from the Departamento Nacional de Infraestrutura de Transportes (DNIT)
method, under 8,2 ton standard axle load, showed that the wheel tracks deeping
would be small, based on the low stresses observed in the subgrade. On the other
hand, the fatigue behaviour presented an inferior performance, reducing the project´s
useful life. It was observed the presence of shakedown in the ranges A, B and C.<br>Pesquisas realizadas no ano de 2016 mostram que 58,2 % das rodovias de
todo o país apresentam alguma deficiência no pavimento, na sinalização ou na
geometria da via. Em média, esses defeitos são responsáveis por cerca de 6% do
número de acidentes, além de aumentar o custo operacional das vias em até 91,6%.
Dentre essas anomalias, destaca-se a deformação permanente denominada de
afundamento na trilha de roda (ATR), que prejudica a dinâmica das cargas, afeta o
conforto ao rolamento e causa risco à segurança. Para o adequado
dimensionamento de um pavimento, é fundamental o conhecimento dos materiais
que o compõem. Neste contexto, destaca-se o subleito, por ser a fundação sobre a
qual são assentes todas as camadas, motivo pelo qual o objetivo geral desta
pesquisa é analisar três solos típicos de subleitos rodoviários de Santa Maria, estado
do Rio Grande do Sul, em especial quanto aos parâmetros de deformação
permanente. A metodologia aplicada neste trabalho consistiu na localização, coleta e
caracterização das jazidas de solos, realização de ensaios laboratoriais e
dimensionamento mecanístico - empírico. Assim, além da caracterização física,
química e mecânica, foram realizados ensaios triaxiais de cargas repetidas para
obtenção do módulo de resiliência e dos parâmetros de deformação permanente,
segundo recomendações do manual de execução de trechos monitorados da
empresa Petróleo Brasileiro Sociedade Anônima (PETROBRAS). O modelo
composto do módulo de resiliência apresentou os melhores resultados, a partir de
ensaios com frequência de 1 Hz e 2 Hz, sendo que a presença de silte em um dos
solos afetou seu comportamento resiliente. Os ensaios de deformação permanente
foram conduzidos a 2 Hz, com 150.000 ciclos de aplicação de carga, cuja correlação
estatística média, empregando a metodologia de Guimarães (2009), foi de 0,91 –
superior a dos modelos de Monismith e Barksdale. Entretanto, a predominância de
materiais finos, aliada à baixa energia de compactação (normal), resultaram em
elevadas taxas de deformação, o que motivou o estudo de um dos solos também
com uso da energia intermediária. Esse procedimento reduziu a deformação
permanente em 40% e elevou o módulo de resiliência em 78,8%. Entretanto, a
simulação numérica do pavimento sob a ótica mecanicista, a partir das espessuras
calculadas pelo método do Departamento Nacional de Infraestrutura de Transportes
(DNIT), aplicando-se a carga padrão de 8,2 toneladas, mostrou que o ATR seria
pequeno, em face das baixas tensões atuantes no subleito, em contraposição ao
desempenho à fadiga, que reduziu sensivelmente a vida útil de projeto. Constatouse
a ocorrência de shakedown nos domínios A, B e C.
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Пасічник, Сергій Сергійович, Сергей Сергеевич Пасичник та Sergey S. Pasichnik. "Поліпшення динамічних і ресурсних показників вантажних вагонів з комплексно модернізованими візками". Thesis, Видавництво Дніпропетровського національного університету залізничного транспорту імені академіка В. Лазаряна, 2012. http://eadnurt.diit.edu.ua:82/jspui/handle/123456789/1321.
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Пасічник, С. С. Поліпшення динамічних та ресурсних показників вантажних вагонів з комплексно модернізованими візками : авт. дис. к. т. н.: 05.22.07 / С. С. Пасічник ; Дніпропетр. нац. ун-т залізн. трансп. ім. акад. В. Лазаряна. - Д. : Вид-во Днiпропетр. нац. ун-ту залізн. трансп. iм. акад. В. Лазаряна, 2012 УДК 629.463.027.1 ГРНТИ 55.41.37<br>UK: АНОТАЦІЯ Дисертацію присвячено розробці пропозицій щодо спрощення обслуговування комплексно модернізованих візків вантажних вагонів при їх експлуатації і ремонті, а також подальшому розвитку комплексної модернізації візків за рахунок використання нових елементів.
Ґрунтуючись на даних спостережень за станом вагонами з комплексно модернізованими візками, що експлуатуються, визначено та розв’язано ряд питань, пов'язаних з поліпшенням технології встановлення елементів модернізації, експлуатацією і ремонтом таких вагонів. Зокрема, проведено розрахунки і розроблено нові конструкції корпусу пружно-коткового ковзуна, що виключають випадки випадання роликів при експлуатації візків; запропоновано зміни в систему переточувань коліс, що дає значне збільшення їх ресурсу; розроблено і випробувано нову схему вимірювання вертикальних сил що діють на візок при проведенні ходових динамічних випробувань вантажних вагонів, використання якої дозволяє підвищити достовірність отримуваної інформації, та ін.
Проведено теоретичні дослідження спрямовані на подальший розвиток комплексної модернізації за рахунок використання в буксових вузлах касетних підшипників, як з жорсткими, так і з пружними адаптерами. Визначено раціональні значення зазорів в буксових вузлах при використанні жорстких адаптерів і раціональні значення жорсткості для пружних адаптерів. Розглянуто варіанти поліпшення схеми з’єднання між надресорною балкою і бічними рамами, а також ряд змін в клиновій системі гасіння коливань.
Розроблено математичну модель вантажного вагона, що дозволяє враховувати жорсткість дисків коліс у різних напрямах. За допомогою цієї математичної моделі визначено раціональні значення жорсткості коліс з пружними дисками. Проведено дослідження щодо оцінки впливу геометричних і фізико-механічних параметрів коліс на їх жорсткість у різних напрямах. Знайдено раціональну форму диска залізничного колеса для застосування в комплексно модернізованих візках.
Використання отриманих при виконанні дисертації результатів дозволить поліпшити динамічні і ресурсні показники вантажних вагонів з комплексно модернізованими візками, а також підвищить ефективність оновлення парку вантажних вагонів.
RU: АННОТАЦИЯ Диссертация посвящена разработке предложений по упрощению обслуживания комплексно модернизированных тележек грузовых вагонов при их эксплуатации и ремонте, а также дальнейшему развитию комплексной модернизации тележек за счет использования новых элементов.
Известно, что на железных дорогах Украины и стран СНГ в последние десятилетия парк грузовых вагонов обновлялся в недостаточной степени. Так, согласно статистике около 90% грузовых вагонов уже приблизились к граничному сроку службы. К тому же у отечественных вагонов используются преимущественно технически устаревшие и малоэффективные тележки модели 18-100.
Библиографический поиск показал, что наиболее эффективным решением проблемы обновления грузового подвижного состава является применение комплексной модернизации тележек (проект С03.04), которая позволяет при незначительных финансовых затратах существенно улучшить динамические и ресурсные показатели грузовых вагонов. Причем указанная модернизация может быть выполнена как при постройке новых вагонов, так и при проведении плановых ремонтов вагонов, находящихся в эксплуатации.
Основываясь на данных наблюдений за состоянием эксплуатируемых вагонами с комплексно модернизированными тележками, в диссертации обозначен и решен ряд вопросов, связанных с усовершенствованием технологии установки элементов модернизации, эксплуатацией и ремонтом таких вагонов. В частности, проведены расчеты и разработаны новые конструкции корпуса упруго-каткового скользуна, предотвращающие случаи выпадения роликов при эксплуатации тележек; предложены изменения в систему переточек колес, что дает существенное увеличение их ресурса; разработана и испытана новая схема измерений действующих на тележку вертикальных сил при проведении ходовых динамических испытаний грузовых вагонов, применение которой позволяет повысить достоверность получаемой информации, и др.
Проведены теоретические исследования, направленные на дальнейшее развитие комплексной модернизации тележек грузовых вагонов за счет использования в буксовых узлах кассетных подшипников, как с жесткими, так и с упругими адаптерами. Определены рациональные значения зазоров в буксовых узлах в случае использования жестких адаптеров и рациональные значения жесткости для упругих адаптеров. Рассмотрены варианты улучшения схемы сочленения надрессорной балки и боковых рам, а также ряд изменений в клиновой системе гашения колебаний.
Разработана математическая модель грузового вагона, позволяющая учитывать жесткость дисков колес в разных направлениях. С помощью этой математической модели определены рациональные значения жесткости колес с упругими дисками. Проведены исследования по оценке влияния геометрических и физико-механических параметров колес на их жесткость в разных направлениях. Найдена рациональная форма диска железнодорожного колеса для применения в комплексно модернизированных тележках.
Использование полученных при выполнении диссертации результатов позволит улучшить динамические и ресурсные показатели грузовых вагонов с комплексно модернизированными тележками, а также повысит эффективность обновления парка грузовых вагонов.
EN: ABSTRACT In dissertation, being base on data of watching cars with the complex modernized bogies, the problem issues related to technology of installing elements of modernization are certain, by exploitation and repairs of such cars. Recommendations are worked out on permission of these problems. The improvements of technology of realization of modernization are offered, theoretical calculations are conducted and the new constructions of case of side bearings, preventing cases falls of rollers, are worked out, the new chart of measuring of vertical forces is worked out and tested during realization of working dynamic tests, allowing to promote authenticity of the got results. Offered change in the system of regrinds of wheels, allowing considerably to increase their resource.
Theoretical studies referred to further development of project of complex modernization due to the use of the cassette bearing with hard or resilient adapters in box knots. The rational values of gaps in box knots at the use of hard adapters and parameters of inflexibility of resilient adapters are certain. Considered some variants to use of the improved method of interaction between a bolster and lateral frames, and some changes of wedges system of antihunting.
The mathematical model of freight car, allowing to take into account inflexibility of wheels in various directions, is worked out.
The rational values of inflexibility of wheels with resilient disks are certain. Researched on determination of influence of geometrical and physical-mechanical properties of wheels on their inflexibility in various directions. The rational form of disk of railway wheel is certain for the use in the complex modernized bogies.
Drawing on the results got in dissertation will allow to improve the dynamic and resource characteristics of freight cars with the complex modernized bogies, and also will promote safety of motion.<br>Інститут технічної механіки Національної академії наук України і Національне космічне агентство України
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West, Colleen Sarah. "First Nation educators' stories of school experiences: reclaiming resiliency." 2012. http://hdl.handle.net/1993/8763.
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This thesis presents the results of a qualitative research study that examined the resilience
development with six Anishinabe (Ojibway) women. This study examined from the women’s
perspectives, “What meaning(s) do First Nation graduates of secondary or post-secondary
education make about risk and/or protective factors that may have affected their success in
completing their degree/diploma requirements?” In this research, I closely examined the
historical accounts and progressive educational changes of six successful Anishinabe women
who attended either the residential, provincial or band operated schools. The narrative/storywork
voiced by the women was gathered by one in-depth interview and were analyzed in two parts.
First, the Western idea of resilience (Benard, 2004) was examined. Second, the development of
resilience utilizing Indigenous narrative/storywork (Archibald, 2008; Thomas, 2008; Wilson,
2008) and the cultural framework of the Medicine Wheel teachings (Bopp, Bopp, Brown, &
Lane, 1988; Medicine Wheel Evaluation Framework, 2012) was explored. The findings from
this thesis revealed that through protective factors and/or supports of their community,
environment, school, and family and restored Indigenous philosophy, maintained culture,
language, spirituality and traditional worldviews, a process of resilience emerged and/or was
developed and overpowered risk factors, challenges and/or adversities. The amalgamation of
findings supports what research suggests that Aboriginal people exist in two worlds, their world
and mainstream world (Fitznor, 2005). Co-existance, acceptance, and a balance of both worlds
are supports and fundamental keys to resiliency and educational success.
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Szlawieniec-Haw, Michael. "The China Factor: Economic vulnerability and global resilience." Thesis, 2012. http://hdl.handle.net/10214/5201.
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This M.A. thesis makes use of the concept and methodology of vulnerability, ‘state capacity’ theory, and Robert Wade’s ‘Wheels Within Wheels’ argument to assess the role of China within the modern global economy. The thesis draws upon the repeated identification of China as a possible global systemic risk by the World Economic Forum’s Global Risk Network as a starting point, with the goal of determining why and how China would be identified in such a way, what elements support such an identification, and to what extent China’s economy might indeed represent a source of vulnerability in the global economic system. The thesis analyzes two key Chinese economic sectors: currency and reserve policy, and the domestic banking sector. Six broad vulnerability vectors are ultimately identified. The thesis concludes that, while China may represent a source of vulnerability in the global economy, it also represents a potentially strong source of resilience due to its unique economic system that emphasizes the role of the state.
Book chapters on the topic "Resilience wheel"
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Röhe, Achim. "Corporate Resilience as Part of the “Winning Wheel”." In Future of Business and Finance. Springer Berlin Heidelberg, 2025. https://doi.org/10.1007/978-3-662-70794-4_3.
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Prakash, Jai, Michele Vignati, and Edoardo Sabbioni. "Vehicle Teleoperation: SRPT Approach Resilience to State Estimation Errors Through Simulation Insights." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_70.
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AbstractVehicle teleoperation holds great promise but faces challenges in complex scenarios, limited awareness, and network delays, impacting human operators’ cognitive workload. Our prior work introduced the Successive Reference Pose Tracking (SRPT) approach, transmitting poses instead of steering commands, potentially mitigating delays. Yet, SRPT’s robustness in the face of state estimation inaccuracies and the necessary sensors remain unclear. In this study, we assess SRPT under various challenging environmental conditions and measurement errors using a Simulink-based 14-DOF vehicle model. Results show SRPT’s consistent performance, using estimated states, in worst-case scenarios. Our minimalist sensor setup - IMU, wheel speed encoder, and steer encoder - underscores SRPT’s resilience without relying on GPS, vital for urban environments. This paper highlights SRPT’s robust teleoperation, setting the stage for future real-world vehicle tests prone to measurement errors.
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Milivinti, M., M. Amadini, F. Ballo, M. Gobbi, and G. Mastinu. "Force Sensors for the Active Safety of Road Vehicles." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_132.
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AbstractForce and moment measurement within road vehicles plays a break-through role in automotive engineering. Both wheel force transducers and instrumented hub carriers are considered in the paper. Both technologies have advantages and disadvantages. Active safety systems (ABS, ESP, up to full automated driving) are expected to be impacted by the measurement of forces and moments at the wheels. Friction potential evaluation and driver model development and monitoring are major field of research. Force and moment measurement technology may also be exploited for lightweight construction purposes. Promising technologies are the ones that don’t need RF data transfer, providing low latency for data transfer and are resiliency against cyber-attacks.
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Gabbar, Hossam A. "Transportation with Electric Wheel." In Fast Charging and Resilient Transportation Infrastructures in Smart Cities. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09500-9_12.
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Röhe, Achim. "Erste Fallstudie: Interviews auswerten mit dem Winning Wheel." In Das resiliente Unternehmen – Die Krisen der Zukunft erfolgreich meistern. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64815-5_4.
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Röhe, Achim. "Unternehmerische Resilienz als Teil des „Winning Wheels“." In Das resiliente Unternehmen – Die Krisen der Zukunft erfolgreich meistern. Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64815-5_3.
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Zhou, Q., Y. He, F. Xu, X. Sheng, Y. He, and Z. Liu. "An Investigation into the Effect of the Number of the Rubber Blocks of a Resilient Wheel on Wheel-Rail Noise." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-7852-6_41.
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Tetteh-fio, Miriam E. K., Victor A. Opoku, Evangeline B. T. Edum-Fotwe, and Linda A. Ofori. "Diversity of Microbes on the Steering Wheels and Door Handles of Commercial Taxis Around KNUST Campus." In Sustainable and Resilient Infrastructure Development in Africa's Changing Climate. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-69606-0_31.
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Momoya Y. and Sekine E. "Deformation characteristics of railway asphalt roadbed under a moving wheel load." In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. IOS Press, 2005. https://doi.org/10.3233/978-1-61499-656-9-1757.
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For the purpose of a basic study to develop a relevant performance-based design method for railway asphalt roadbed, resilient and residual deformation characteristics of roadbed and subgrade were evaluated by means of scale model tests. In this study, moving-wheel loading tests were carried out, because the deformation characteristics under fixed-point loading were substantially different from that under traveling trainloads. This paper discusses the effect of the stiffness and thickness of roadbed on the resilient and residual deformation of roadbed and subgrade under the moving-wheel loads.
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Filipowicz, K., W. Biedunkiewicz, M. Krolikowski, and D. Grzesiak. "Machining of Resilient Wheelsets on Wheel-Turning Lathes." In DAAAM International Scientific Book 2010. DAAAM International Vienna, 2010. http://dx.doi.org/10.2507/daaam.scibook.2010.05.
Full textConference papers on the topic "Resilience wheel"
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Hitchiner, Michael P. "Current Status of Peel Grinding Technology." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34219.
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Paper reviews the development of peel grinding from what was once a highly specialized process for finishing small hardened ferrous materials involving CBN grain in an ultra-tough metal bonded wheel requiring ultra-high work and wheel speeds in oil coolant for small batch production to replace plunge grinding. Recent developments are now questioning the need for the bond resilience with its attending difficulties of dressing, oil coolant, hard workpieces, or even high wheel or work speeds. The process has progressed to now challenge not only plunge grinding but other machining processes including rough machining of billets, hard turning and finish turning of steels in the soft state. The use of peel grinding is also considered in combination with other machining processes.
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Jimin, Zhang, Wan Jingyuan, Li Wen, et al. "Research on Simulation of Resilient Wheel Dynamometer." In 2020 Joint Rail Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/jrc2020-8069.
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Abstract Among many testing items of infrastructure, wheel-rail force is an important factor that causes track failure, damage, train derailment and vehicle parts damage. It is also used to evaluate the ride stability, safety and as the main basis for speed limit and speed increase. Among many methods of wheel-rail force detection, the method of wheel-rail force measurement is the most accurate and direct method of wheel-rail force measurement. The method of measuring wheel-rail interaction force using wheelset of railway locomotive and rolling stock as force sensor has the highest accuracy among all wheel-rail force measurement methods. Force-measuring wheelset is the core sensor in the dynamic test research of railway vehicles, and its performance directly affects the evaluation results of the tested objects. Before the actual line test, it is necessary to calibrate the dynamometer wheelset on the test bench. The calibration of dynamometer wheelset is an important link in the research and application of dynamometer wheelset. With the rapid development of rail transit in various countries and the great improvement of locomotive and rolling stock manufacturing technology, higher and higher requirements has been put forward for the performance of force-measuring wheelsets, which are mainly embodied in obtaining ideal sensitivity and linearity, minimizing cross-interference and all kinds of possible external interference, and reducing the influence of the change of the position of the action point on the measurement results. For the rigid wheelset, the calibration of the force-measuring wheelset is basically perfect from the actual production to the algorithm. The relevant countries also determine the calibration in the standard form. At present, more and more urban rail low floor vehicles are using independent resilient wheels. The mechanical structure of the bogie with resilient wheels is complex. At the same time, because of the small diameter of the resilient wheels and the rubber layer between the wheel hoop and the wheel center, it is difficult to find the strain/stress sensitive area accurately, as well as the unique installation process, the calibration of resilient wheels is rather difficult. This paper takes the low floor resilient wheels as the research object, and studies how to make the calibration method of high precision and suitable for the independent rotating wheels of resilient wheels and the processing and analysis of calibration data. The main research contents are as follows: the development of force-measuring wheelset which is based on the finite element simulation of a resilient wheel, stress distribution analysis, and the fabrication scheme of force-measuring wheelset which meets the requirement of test accuracy is proposed by using virtual bridge formation.
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Greene, Rob. "Vibration Control Design for Light Rail Transit: A Single Project With the Full Rainbow of Vibration Control Features: Case Study." In 2015 Joint Rail Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/jrc2015-5617.
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Because of the recent emphasis on rail transit infrastructure expansion and rebuilding in the United States, there is concern about the potential adverse vibration effects on existing activities that are sensitive to vibration and ground-borne-noise located in proximity to new or reactivated rail system rights-of-way. A Southern California at-grade/elevated LRT system that is currently under construction required the design and specification of extensive vibration control features. The final design needed to include the entire range of vibration mitigation tools presented in the Federal Transit Administration guidance manual. Designs and Contract Specifications included simple single-layer ballast mats; multi-layer ballast mats; high-resilience direct fixation fasteners; potential wheel-squeal solutions; low-vibration special trackwork; continuously-supported, street-running, floating slab track; and discrete, steel-helical-spring-supported floating slab track. It is noteworthy that the discrete steel-spring-supported FST is the first use of this vibration control approach in an at-grade rail system in the United States. This paper will discuss the overall approach, data analysis, solutions development, and the final designs prepared for this project and how this information may be beneficial to other projects with similar issues.
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Dhameliya, Maulikkumar, Sidharth Sher, and Souma Chowdhury. "Prototyping and Simulated Analysis of Autonomous Swarm-Bots." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-86226.
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Teams of small (mm-to-cm scale) robots, often known as swarm-bots, can provide unique functionality owing to their small form factor, distributed sensing capabilities, resilience to disruptions and agent-loss, and likely low cost. Such swarm-bots are being increasingly touted to support various indoor surveillance, hazard detection, and search and rescue missions. This paper presents the conceptual design, fabrication, and testing of a new cm-scale wheeled swarm-bot. Simulated investigation of a simple particle-swarm-inspired approach to coordinated path planning for these swarm-bots is also presented. The swarm bot is developed around a modular platform, comprising snap-on (3D printed) structural components, a stepper-motor actuated wheel system, a Raspberry Pi computing node, a wireless radio module, a Lipo battery, and proximity sensors; all components are readily detachable, thereby allowing reconfiguration flexibility. Through three design generations, a stable prototype offering >20cm/s speed and ∼50 min endurance, was developed, assembled and tested. A virtual simulated environment is developed by combining MATLAB-based modules and a V-Rep environment, in order to simulate the coordinated operation of these swarm-bots. A 78% rate of success in completing target (light source) search missions was observed during the numerical experiments, and performance robustness was observed to improve with increasing swarm size.
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Christodoulou, Chrysovalanto, and Georgios Ellinas. "Resilient Wheel-Based Optical Access Network Architecture." In 2019 11th International Workshop on Resilient Networks Design and Modeling (RNDM). IEEE, 2019. http://dx.doi.org/10.1109/rndm48015.2019.8949090.
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Hu, Xianting, Zhao Xue, and Jimin Zhang. "Dynamic Model of Resilient Wheel and its Performance Comparison." In 2022 Joint Rail Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/jrc2022-79357.
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Abstract In order to further study the improvement effect of resilient wheel on performance of vehicle dynamic, the dynamic models of tram with resilient wheel which has concentrated force element, 4 and 20 uniform circumferential distributed force elements are established respectively. Under three modeling methods, the performance indexes of tram are compared and analyzed. The running stability of the tram with resilient wheel with 4 and 20 distributed force elements is basically consistent. The curve passing simulation results of 4 force elements and concentrated force element are quite different from those of 20 force elements. The influence of whose internal transmission mode is simplified and ignored, so 4 force elements and concentrated force element modeling methods are not suitable in the curve passing performance research.
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Imbert, Luc, and Matteo Frea. "Benchmarking the Adaptive Wheel Slide Protection." In EuroBrake 2021. FISITA, 2021. http://dx.doi.org/10.46720/6676035eb2021-stp-003.
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With the ever-increasing railway traffic on existing lines railway operators are requesting means to increase line capacity, operational resiliency and lower Life Cycle Costs. WSP systems integrated in railway vehicles can address the three aspects. Indeed, a shorter braking distance in low wheel/rail adhesion conditions can increase the line capacity by allowing the vehicles to safely travel closer to each other. Furthermore, WSP systems with better performing algorithms in very and extremely low wheel/rail adhesion conditions would lead to less wheel locks and lower wheel slide velocities diminishing the number of wheel flats and overall wheel damage, thereby reducing the LCC. The increased performance in these conditions would also lead to an increased resiliency to environmental conditions. As a follow-up to the work presented in the paper entitled “ADAPTIVE WHEEL SLIDE PROTECTION ALGORITHMS” - EB2019-IBC-010, a two-point investigation is led to evaluate how the A-WSP addresses the railway operators needs. The first investigation will quantify the differences in terms of braking distance and air consumption between a WSP device incorporating a traditional WSP algorithm and a WSP device incorporating an adaptive WSP algorithm. The second investigation will quantify differences in terms of wheel flats and wheel damage between a WSP device incorporating a traditional WSP algorithm and a WSP device using an adaptive WSP algorithm, </p><p><br></p><p>The quantification of both investigations will be done at least according to EN15595:2018 criteria and could be extended if these do not provide a holistic view of the differences. The quantification will be based on the analysis of test results from a hardware in the loop test bench and on test results from the Multi-axle Roller Rig present in Wabtec’s laboratory.</p><p>In order to produce a realistic output, the hardware in the loop test bench and the Multi-axle Roller Rig will be configured according to the characteristics of an existing vehicle and subjected to a real mission profile including the most critical situation identified by railway operators.
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Qiang, Feng, and Na Wu. "Research on resilient wheel sluggish movement of light rail transit." In 4th International Conference on Mechanical, Electronics and Electrical and Automation Control (METMS 24), edited by Junxing Zhang, Zeashan Hameed Khan, and Pengfei Zeng. SPIE, 2024. http://dx.doi.org/10.1117/12.3030305.
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Talamini, Brandon, Jeff Gordon, and A. Benjamin Perlman. "Investigation of the Effects of Sliding on Wheel Tread Damage." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82826.
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Wheel tread spalling is the main source of damage to wheel treads and a primary cause for wheel removals from service. Severe frictional heating of the wheel-rail contact patch during sliding causes the formation of martensite, a hard, brittle microstructure. The martensite patches break away from the more resilient bulk of the wheel tread when subjected to contact loads, resulting in spall formation. Prolonged sliding allows a greater volume of wheel tread material to reach extremely high temperatures, which will lead to material ablation and the formation of a slid flat. Such flats are the cause of wheel impact loads, which are extremely damaging to truck components and rail. This paper outlines an approach developed to estimate the effects of sliding on wheel flat formation and the potential severity of spalling. The methodology is described and preliminary results are presented using an intentionally simplified idealization of the wheel-rail contact geometry. Material characterization (temperature-dependent properties and failure criteria) and management of model size are of equal importance to geometric fidelity and are the focus in the early stages of the development of the qualitative model present here.
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Khasawneh, M. A. "Investigating the impact of pavement surface features on skid resistance: A review on machine learning approach." In Civil and Environmental Engineering for Resilient, Smart and Sustainable Solutions. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903414-100.
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Abstract. Pavement friction is a critical factor in ensuring road safety and performance. This review explores the correlation between asphalt pavement surface features and locked-wheel skid trailer friction values using Machine Learning (ML) algorithms. The study focuses on how ML algorithms, particularly Artificial Neural Networks (ANNs), can be utilized to analyze and predict pavement surface characteristics and their impact on skid resistance. The review provides an overview of common pavement surface features that influence skid resistance, such as texture and roughness, and describes the measurement techniques used to quantify these features. It also discusses the application of locked-wheel skid trailer testing as a method for measuring pavement friction and highlights the potential of ML algorithms in analyzing skid resistance data. The review concludes with a discussion on the challenges and future directions of using ML algorithms and ANNs in pavement engineering studies, emphasizing the importance of study in improving road safety and pavement performance.