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Journal articles on the topic 'Mobility track'

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Published: 1 July 2023

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1

Hallinan, Maureen T. "Track Mobility in Secondary School." Social Forces 74, no. 3 (March 1996): 983. http://dx.doi.org/10.2307/2580389.

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2

Hallinan, M. T. "Track Mobility in Secondary School." Social Forces 74, no. 3 (March 1, 1996): 983–1002. http://dx.doi.org/10.1093/sf/74.3.983.

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3

McCullough, M. K., and E. J. Haug. "Dynamics of High Mobility Track Vehicles." Journal of Mechanisms, Transmissions, and Automation in Design 108, no. 2 (June 1, 1986): 189–96. http://dx.doi.org/10.1115/1.3260801.

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A mechanical system superelement that represents spatial dynamics of high mobility track vehicle suspension systems is derived. Using results from a companion paper [1], the equations of motion for a suspension system with an arbitrary number of road wheels are systematically derived. Track is represented as a complex internal force element that acts between ground, wheels, and the chassis of the vehicle. Track tension is computed from a relaxed catenary relationship and track bridging effects are modeled. Numerical results for driver acceleration and absorbed power, as well as track tension are presented. A factor of 90 decrease in compute time is achieved over a comparable multibody model of the same vehicle.
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4

Lucas, Samuel R., and Aaron D. Good. "Race, Class, and Tournament Track Mobility." Sociology of Education 74, no. 2 (April 2001): 139. http://dx.doi.org/10.2307/2673167.

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5

Schedel, Roland. "Mazda on track for environmentally friendly mobility." ATZautotechnology 8, no. 10 (October 2008): 52–53. http://dx.doi.org/10.1007/bf03247091.

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6

Feilhauer, Thomas, Florian Braun, Katja Faller, David Hutter, Daniel Mathis, Johannes Neubauer, Jasmin Pogatschneg, and Michelle Weber. "Mobility Choices—An Instrument for Precise Automatized Travel Behavior Detection & Analysis." Sustainability 13, no. 4 (February 10, 2021): 1912. http://dx.doi.org/10.3390/su13041912.

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Within the Mobility Choices (MC) project we have developed an app that allows users to record their travel behavior and encourages them to try out new means of transportation that may better fit their preferences. Tracks explicitly released by the users are anonymized and can be analyzed by authorized institutions. For recorded tracks, the freely available app automatically determines the segments with their transportation mode; analyzes the track according to the criteria environment, health, costs, and time; and indicates alternative connections that better fit the criteria, which can individually be configured by the user. In the second step, the users can edit their tracks and release them for further analysis by authorized institutions. The system is complemented by a Web-based analysis program that helps authorized institutions carry out specific evaluations of traffic flows based on the released tracks of the app users. The automatic transportation mode detection of the system reaches an accuracy of 97%. This requires only minimal corrections by the user, which can easily be done directly in the app before releasing a track. All this enables significantly more accurate surveys of transport behavior than the usual time-consuming manual (non-automated) approaches, based on questionnaires.
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7

Zang, Liguo, Shaoqing Yang, Chongyou Wu, Xingyu Wang, and Fei Teng. "Design and kinematics analysis of coordinated variable wheel-track walking mechanism." International Journal of Advanced Robotic Systems 17, no. 4 (July 1, 2020): 172988142093057. http://dx.doi.org/10.1177/1729881420930577.

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Wheeled walking mechanism has the advantages of high mobility and low rolling resistance, but it is easy to sink and slip when working in soft and muddy terrain. Tracked walking mechanism has the advantages of high passability and stability, but it has the problems of difficult steering and slow walking speed. In order to make the walking mechanism possess a combination of passability, stability, and mobility, a coordinated variable wheel-track walking mechanism was designed. The coordinated variable triangle track can change the landing area through the deformation structure to improve the ability of the walking mechanism to adapt to different terrains. The kinematics equation of the wheel-track walking mechanism was established, and the front wheel steering angle equation during motion was derived. Based on RecurDyn software, the motion simulation of the walking mechanism was carried out under the conditions of straight walking and turning on the flat ground, climbing hillsides, and crossing ditches. The simulation results show that the coordinated variable wheel-track walking mechanism has the mobility of wheeled walking mechanism and the passability and stability of the tracked walking mechanism. The stability and climbing ability of the wheel-track walking mechanism was better when the coordinated variable triangle track in the stretch state, and the mobility and steering ability was better in the contraction state.
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8

KINUGASA, Tetsuya, Takafumi HAJI, Koji Yoshida, Yuta OTANI, Koichi OSUKA, and Hisanori AMANO. "719 Mobility of Flexible Mono-Tread Mobile Track." Proceedings of Conference of Chugoku-Shikoku Branch 2008.46 (2008): 269–70. http://dx.doi.org/10.1299/jsmecs.2008.46.269.

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9

Jacob, Marita, and Nicole Tieben. "SOCIAL SELECTIVITY OF TRACK MOBILITY IN SECONDARY SCHOOLS." European Societies 11, no. 5 (December 2009): 747–73. http://dx.doi.org/10.1080/14616690802588066.

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10

Novgorodtseva, Anastasia N., Nadezhda I. Sivkova, Evgeniy V. Knysh, and Mikhail Bo Zavadski. "Global and national tracks of mobility of graduates of educational institutions in Russia." Perspectives of Science and Education 54, no. 6 (December 31, 2021): 55–68. http://dx.doi.org/10.32744/pse.2021.6.4.

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Introduction. Involvement in global information flows, holding major international events in Russia, focusing on interaction with foreign universities and partners creates conditions for the formation of modern youth's focus on the global track of mobility – admission to educational organizations of foreign countries. At the same time, role and quality of education in Russia in the global market are increasing through the development of Russian education, internationalization and networking of universities. Such tendencies to increase mobility in education naturally require a study of the prevalence of the ideas of mobility in general and in certain areas among schoolchildren and university students. The aim of the study is to reveal the prevalence of the ideas of mobility (potential mobility), both within Russia and abroad, among graduates of educational institutions (at different levels). Materials and research methods. The study involved 1136 graduates of educational institutions in Ekaterinburg, of which 30% are graduates of secondary schools, lyceums and gymnasiums, 60% are graduates of bachelor's degrees from 4 universities, and 10% are graduates of master's degree from 3 universities. Research results. A study conducted in 2020–2021 indicated the following trends: the higher the level of education, the higher the value of the educational environment in the country of residence, the more broadly represented the national track of mobility (schoolchildren – 46%, bachelors – 51%, masters – 54%). Among the global market of educational services for all graduates of educational institutions in Russia, priority is given to Europe. Among bachelors, there are more of those who are confident that they can find the desired job in Russia (21%) than in another country. Master students are more confident in the possibilities of working in their specialty in Russia (36%). The older the graduate becomes, the more rational motives prevail in the track of mobility. Conclusion. The study of potential mobility allows us to conclude that the predominance of the national track of mobility is directly proportional to growing up, the older the respondent, the more rationally he approaches the choice of a further place of study and residence, taking into account the possibilities, both intellectual and financial. Thus, it becomes obvious why sufficiently high figures of potential mobility do not become as high indicators of real educational and labor emigrations.
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11

Liu, Weifeng, Linlin Du, Weining Liu, and David J. Thompson. "Dynamic response of a curved railway track subjected to harmonic loads based on the periodic structure theory." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 232, no. 7 (January 31, 2018): 1932–50. http://dx.doi.org/10.1177/0954409718754470.

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In this study, the authors have analysed the dynamic response of a curved railway track that is subjected to moving and non-moving harmonic loads. The track is considered as a curved Timoshenko beam supported by periodically spaced discrete fasteners. The displacement and rotation of the curved rail are expressed as the superposition of track modes in the frequency domain. Periodic structure theory is applied to the equations of motion of the curved track, allowing the dynamic response of the track to be calculated efficiently in a reference cell. The effect of the stiffness and damping of the fasteners, the fastener spacing and the radius of curvature on the mobility and decay rate of the track are analysed for non-moving loads on the rail head. The vibration of the rail due to moving loads is also discussed. It is found that the dynamic response of a curved rail with a large radius has the same characteristics as that of a straight track. However, the dynamic response of the track is significantly affected when the radius of curvature becomes small. The radius affects the mobility; it also has an effect on the track decay rate below 2000 Hz and the velocity of the rail in the vertical direction when the radius is smaller than about 15 m and for the lateral direction when it is less than about 30 m. Moreover, the curvature has a significant influence on the vertical/lateral cross mobility, the magnitude of which increases as the radius is reduced. When the radius is larger than 10 m, the amplitude of the lateral vibration under a moving vertical load and the vertical response to a moving lateral load are inversely proportional to the radius.
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12

Teichmann, Joerg, Harald Burchardt, Rachel Tan, and Patrick Daniel Healy. "Hip Mobility and Flexibility for Track and Field Athletes." Advances in Physical Education 11, no. 02 (2021): 221–31. http://dx.doi.org/10.4236/ape.2021.112017.

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13

Hallinan, Maureen T. "Race effects on students' track mobility in high school." Social Psychology of Education 1, no. 1 (March 1996): 1–24. http://dx.doi.org/10.1007/bf02333403.

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14

Yastrebov, Gordey, Yuliya Kosyakova, and Dmitry Kurakin. "Slipping Past the Test: Heterogeneous Effects of Social Background in the Context of Inconsistent Selection Mechanisms in Higher Education." Sociology of Education 91, no. 3 (May 28, 2018): 224–41. http://dx.doi.org/10.1177/0038040718779087.

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In this article, we analyze how the existence of alternative pathways to higher education, which implies different selection mechanisms, shapes social inequality in educational attainment. We focus on the Russian educational system, in which higher education can be accessed from academic and vocational tracks, but the rules of admission to higher education from these tracks are different. Access through the academic track is highly selective due to obligatory high-stakes testing, which determines secondary-school graduates’ eligibility to pursue higher education. The vocational track is generally less selective with regard to student intake and provides less restrictive access to higher education. We argue that this system has nuanced implications for social inequality. On one hand, transitions from vocational education to higher education can promote greater social mobility by offering an affordable and low-risk gateway to higher education for children from less-advantaged families. On the other hand, more-advantaged families might use the vocational track to higher education if their children face a high risk of failure in the more selective academic track. We test this conjecture and provide supporting evidence using data from the longitudinal survey Trajectories in Education and Careers.
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15

Ventura, Antonio, Claudia Smiraglio, Antonio Viscomi, Sergio De Salvatore, and Bernardo Bertucci. "The Glenoid Track Concept: On-Track and Off-Track—A Narrative Review." Osteology 2, no. 3 (July 19, 2022): 129–36. http://dx.doi.org/10.3390/osteology2030015.

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Shoulder instability is described as a functional deficiency caused by excessive mobility of the humeral head over the glenoid. Various Glenohumeral Instability (GI) types have been described, but the traumatic anteroinferior form is the most frequent. The differences between engaging and non-engaging Hill–Sachs lesions (HSLs) are linked to bone loss assessment. On the contrary, the novel difference between “on-track” and “off-track” lesions is strictly related to surgical techniques. The specific involvement of glenoid and humerus bone defects in recurrent GI was poorly assessed in the literature before the glenoid-track concept (GT). Magnetic Resonance Imaging (MRI) and Arthro-MRI have been widely used to identify and characterize lesions to the ligamentous structures. However, only new technologies (3 Tesla MRI) accurately detect HSLs. On the contrary, Computed Tomography (CT) has been adopted to quantify glenoid bone deficit. The GT concept is a valuable tool for evaluating anterior shoulder instability in patients. Shoulders out of alignment may require more than just an arthroscopic Bankart, and a remplissage or bone transfer may be necessary. Specifically, isolated Bankart repair should be considered in patients with recurrent instability and an on-track lesion with less than 25% glenoid bone loss. In off-track lesions and less than 25% glenoid bone loss, remplissage should be used. Bone transplant surgery is required for patients with a glenoid bone defect of more than 25%. This narrative review aims to report the most updated findings on “on-track” and “off-track” lesions in GI.
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16

Rahmayana, Putri Elsari, Humiras Hardi Purba, and Budi Susetyo. "Improving Ballastless Track Quality Using Project Quality Management and SmartPLS." ComTech: Computer, Mathematics and Engineering Applications 12, no. 1 (April 28, 2021): 19–32. http://dx.doi.org/10.21512/comtech.v12i1.6616.

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Transportation is still a significant problem in Indonesia. Indonesians prefer to use private vehicles for daily mobility purposes because public transportation lacks safety and comfort and has a longer trip duration. This issue causes congestion and air pollution problems. Hence, sustainable railbased public transportation is recommended. Light Rail Transit (LRT) tends to be congestion-free and has a relatively shorter travel time with a large passenger capacity. Most LRT track constructions use the ballastless track. However, this track construction is still new in Indonesia. The research aimed to determine the most important factors in improving ballastless track construction performance on LRT. The research referred to the existing LRT construction in Indonesia using Lean Construction (LC) and Project Quality Management (PQM) approaches. Statistical science approach with SmartPLS software was also used in data processing and modeling the relationship between variables. The research was conducted by distributing questionnaires to determine the most important factors in improving the quality of ballastless tracks with variables and indicators extracted from LC and PQM methods. From five tested hypotheses, only one hypothesis is accepted. Quality control has a positive effect on track quality. It is also found that quality control becomes the most important variable in improving ballastless track quality.
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17

Buchner, D. M. "One Lap Around the Track: The Standard for Mobility Disability?" Journals of Gerontology Series A: Biological Sciences and Medical Sciences 63, no. 6 (June 1, 2008): 586–87. http://dx.doi.org/10.1093/gerona/63.6.586.

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18

Vega, Anthony R., Spencer A. Freeman, Sergio Grinstein, and Khuloud Jaqaman. "Multistep Track Segmentation and Motion Classification for Transient Mobility Analysis." Biophysical Journal 114, no. 5 (March 2018): 1018–25. http://dx.doi.org/10.1016/j.bpj.2018.01.012.

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19

Vogeler, Iris, Rogerio Cichota, Siva Sivakumaran, Markus Deurer, and Ian McIvor. "Soil assessment of apple orchards under conventional and organic management." Soil Research 44, no. 8 (2006): 745. http://dx.doi.org/10.1071/sr06096.

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To determine the effect of wheel traffic and two different management practices on soil compaction and its consequences on physical and chemical soil properties, we measured penetration resistance, water infiltration, bulk density, macroporosity, chemical mobility, air permeability, and soil strength in a conventional orchard (integrated fruit-production program) with bare (sprayed with herbicides) rows and an organic apple orchard with grassed rows. Resistance measurements were taken both within the tree row and the wheel track, down to a depth of 0.35 to 0.40 m. The results indicate that compaction is greater in the wheel tracks under both management methods. Compaction in the wheel track was higher under organic than conventional management. Organic management resulted in a higher macroporosity in both the row and the wheel-track than conventional management. The ‘close-to-saturation’ infiltration rate was significantly greater within the row of the organic orchard (0.06 m/h) compared with the row of the conventional orchard (0.02 m/h), and compared with the wheel tracks (0.01 m/h). The precompression stress value in the top 100 mm, a measure of the soil strength, was low on all sites. The chemical mobilities were 57 and 50% in the organic orchard, and 86 and 93% in the conventional orchard, respectively, for wheel track and row. Apart from the compaction in the wheel track of the organic orchard, physical and chemical soil characteristics were in a better condition compared with the conventional orchard.
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20

Yang, Y. B., Zhi-Lu Wang, Kang Shi, Hao Xu, and Y. T. Wu. "State-of-the-Art of Vehicle-Based Methods for Detecting Various Properties of Highway Bridges and Railway Tracks." International Journal of Structural Stability and Dynamics 20, no. 13 (August 31, 2020): 2041004. http://dx.doi.org/10.1142/s0219455420410047.

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The vehicle scanning method (VSM), an indirect approach for bridge measurement, has attracted intensive attention since it was proposed. By this method, a moving test vehicle is employed to detect the “mechanical” properties of the bridge, e.g. frequencies, mode shapes, damages, etc., utilizing the interaction between the two substructures. Compared with the conventional direct approach that requires quite a few sensors and data loggers to be fitted on the bridge, the advantage of the VSM is obvious: mobility, economy, and efficiency. As for railways, the broader vehicle-based techniques have long been used to detect the “geometrical” properties of the track, such as track profiles and rail conditions. Relatively little use has been made of the interaction between the moving vehicle/train and the track/bridge. This paper is a state-of-the-art report of the VSM’s applications to highway bridges and the vehicle-based techniques to railway tracks. It starts with a summary of the pioneering works by Yang and co-workers on the VSM. Then, the applications of the techniques to highway bridges and railway tracks will be separately reviewed. Conclusions will be made, along with future research directions, at the end of the paper.
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21

Ferreira, Joao. "Mining Users Mobility at Public Transportation." Inteligencia Artificial 20, no. 59 (February 6, 2017): 32. http://dx.doi.org/10.4114/intartif.vol20iss59pp32-41.

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In this research work we propose a new approach to estimate the number of passengers in a public transportation and determinate the users’ route path based on a passive approach without user intervention. The method is based on the probe requests of users mobile device through the collected data in wireless access point. This data is manipulated to extract the information about the numbers of users with mobile devices and track their route path and time. This data can be manipulated to extract useful knowledge related with users’ habits at public transportation and extract user mobility patterns.
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22

Chen, Lin, Fengli Xu, Qianyue Hao, Pan Hui, and Yong Li. "Getting Back on Track: Understanding COVID-19 Impact on Urban Mobility and Segregation with Location Service Data." Proceedings of the International AAAI Conference on Web and Social Media 17 (June 2, 2023): 126–36. http://dx.doi.org/10.1609/icwsm.v17i1.22132.

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Understanding the impact of COVID-19 on urban life rhythms is crucial for accelerating the return-to-normal progress and envisioning more resilient and inclusive cities. While previous studies either depended on small-scale surveys or focused on the response to initial lockdowns, this paper uses large-scale location service data to systematically analyze the urban mobility behavior changes across three distinct phases of the pandemic, i.e., pre-pandemic, lockdown, and reopen. Our analyses reveal two typical patterns that govern the mobility behavior changes in most urban venues: daily life-centered urban venues go through smaller mobility drops during the lockdown and more rapid recovery after reopening, while work-centered urban venues suffer from more significant mobility drops that are likely to persist even after reopening. Such mobility behavior changes exert deeper impacts on the underlying social fabric, where the level of mobility reduction is positively correlated with the experienced segregation at that urban venue. Therefore, urban venues undergoing more mobility reduction are also more filled with people from homogeneous socio-demographic backgrounds. Moreover, mobility behavior changes display significant heterogeneity across geographical regions, which can be largely explained by the partisan inclination at the state level. Our study shows the vast potential of location service data in deriving a timely and comprehensive understanding of the social dynamic in urban space, which is valuable for informing the gradual transition back to the normal lifestyle in a “post-pandemic era”.
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23

Haji, Takafumi, Tetsuya Kinugasa, Shinichi Araki, Daiki Hanada, Koji Yoshida, Hisanori Amano, Ryota Hayashi, Kenichi Tokuda, and Masatsugu Iribe. "New Body Design for Flexible Mono-Tread Mobile Track: Layered Structure and Passive Retro-Flexion." Journal of Robotics and Mechatronics 26, no. 4 (August 20, 2014): 460–68. http://dx.doi.org/10.20965/jrm.2014.p0460.

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<div class=""abs_img""><img src=""[disp_template_path]/JRM/abst-image/00260004/08.jpg"" width=""300"" />Flexible mono-tread mobile track RT06</span></div> Robot technology is expected to be applicable to missions on rough terrain, such as rescue activities, environmental investigation, and planetary exploration. Tracked vehicles are effective in such environments because the contact pressure of the vehicle can be distributed more widely. To improve mobility, new mechanisms such as serpentine tracked vehicles have been proposed. We previously proposed the flexible mono-tread mobile track (FMT). The first prototype, WORMY, had a mechanical problem when it moves flexing, i.e., track belt interference and derailing. This paper proposes and confirms a new FMT design strategy using a layered structure to reduce space between vertebrae, solving derailing. A new prototype using the layered structure confirmed its mobility. We also used the prototype to evaluate the effectiveness of passive retro-flexion against obstacles. </span>
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24

Johnson, Raymond H., Susan M. Hall, and Aaron D. Tigar. "Using Fission-Track Radiography Coupled with Scanning Electron Microscopy for Efficient Identification of Solid-Phase Uranium Mineralogy at a Former Uranium Pilot Mill (Grand Junction, Colorado)." Geosciences 11, no. 7 (July 16, 2021): 294. http://dx.doi.org/10.3390/geosciences11070294.

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At a former uranium pilot mill in Grand Junction, Colorado, mine tailings and some subpile sediments were excavated to various depths to meet surface radiological standards, but residual solid-phase uranium below these excavation depths still occurs at concentrations above background. The combination of fission-track radiography and scanning electron microscope energy-dispersive X-ray spectroscopy (SEM-EDS) provides a uniquely efficient and quantitative way of determining mineralogic associations of uranium that can influence uranium mobility. After the creation of sample thin sections, a mica sheet is placed on those thin sections and irradiated in a nuclear research reactor. Decay of the irradiated uranium creates fission tracks that can be viewed with a microscope. The fission-track radiography images indicate thin section sample areas with elevated uranium that are focus areas for SEM-EDS work. EDS spectra provide quantitative elemental data that indicate the mineralogy of individual grains or grain coatings associated with the fission-track identification of elevated uranium. For the site in this study, the results indicated that uranium occurred (1) with coatings of aluminum–silicon (Al/Si) gel and gypsum, (2) dispersed in the unsaturated zone associated with evaporite-type salts, and (3) sorbed onto organic carbon. The Al/Si gel likely formed when low-pH waters were precipitated during calcite buffering, which in turn retained or precipitated trace amounts of Fe, As, U, V, Ca, and S. Understanding these mechanisms can help guide future laboratory and field-scale efforts in determining long-term uranium release rates to groundwater.
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25

Chung, Jane, Joseph Boyle, and David Wheeler. "CORRELATIONS OF GPS-BASED COMMUNITY MOBILITY METRICS BETWEEN PERSONS WITH DEMENTIA AND FAMILY CAREGIVERS." Innovation in Aging 6, Supplement_1 (November 1, 2022): 453. http://dx.doi.org/10.1093/geroni/igac059.1767.

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Abstract Currently, the majority of dementia care is provided at home by informal caregivers. Most informal caregivers share a routine with their loved ones and change their activity patterns to adapt to a new routine of persons with dementia (PWDs). Given the dementia caregiving context, caregivers’ mobility behaviors and PWDs’ mobility may be positively associated. This study aimed to characterize patterns of GPS-derived community mobility in dementia dyads and examine relationships between PWDs’ and caregivers’ mobility patterns. Six dyads wore a GPS data logger inside and outside the home for 8-11 days. Twelve participants generated valid GPS track files (N=110). Four temporal and spatial mobility metrics were derived from GPS data (total distance, time use, median speed, and convex hull area). Then we calculated Pearson correlation coefficients between PWDs and their caregivers over all tracks. All dyads made active out-of-home trips, indicated by mean daily distance (range: 6,198 - 115,592m for PWDs; 5,125 - 108,857m for caregivers). Median speed of movement ranged from 0.09 to 1.29 km/hour for PWDs, and from 0.21 to 0.97 km/hour for caregivers. The mean size of convex hull over the monitoring period indicates a limited space usage level in both PWDs and caregivers, meaning restricted community mobility despite relatively large distance trips. The correlation coefficient was positive and significant for each metric (r = 0.70-0.97, p &lt; .001). These results suggest substantial agreement in the mobility metrics between PWD and their caregivers, indicating a high level of dyadic effects of a partner’s experience of community mobility.
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26

Nilsson, Andreas, and Urban Nuldén. "TrottingPal: designing for mobility, personalization and collaboration at the trotting track." Managing Leisure 8, no. 3 (January 2003): 154–67. http://dx.doi.org/10.1080/1360671032000123681.

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27

Lucas, Samuel R. "Effectively Maintained Inequality: Education Transitions, Track Mobility, and Social Background Effects." American Journal of Sociology 106, no. 6 (May 2001): 1642–90. http://dx.doi.org/10.1086/321300.

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28

Koyama, Tsutomu, Tetsuya Kinugasa, Takafumi Haji, and Koji Yoshida. "C10 Mobility of Flexible Mono-Tread Mobile Track (FMT) : Additional Experiments." Proceedings of Conference of Kyushu Branch 2008 (2008): 107–8. http://dx.doi.org/10.1299/jsmekyushu.2008.107.

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29

Vidya, K., and A. Aarthy. "Mobility Platform for Physically Challenged People using Wireless Sensor Network." International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 255. http://dx.doi.org/10.14419/ijet.v7i2.24.12059.

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The Primary objective of Automatic Railway Bridge System is to help the physically Challenged Passenger to move from one Platform to another. Crossing the railway track inside the railway station is very difficult. But it is quite difficult to the handicapped and aged persons to cross the railway track without the help of other. The proposed system uses the train time for opening and closing of bridges. This is done by wireless communication. Each train is connected with RF transceiver, which will send a data of arrival before it reaches the station platform. If the train leaves the platform, the automatically the mobile platform will be bridged between two platforms to build a path between them. This project is designed with arduino microcontroller. The arduino microcontroller gives the input from the RSSI and give command to the motor to run in order to change in the position of open and close the mobility rostrum
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30

Duncan, Derek. "In the Wake: Postcolonial Migrations from the Horn of Africa." Forum for Modern Language Studies 56, no. 1 (December 23, 2019): 96–109. http://dx.doi.org/10.1093/fmls/cqz055.

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Abstract Abu Bakr Khaal’s African Titanics (written in Arabic) and Jonny Steinberg’s A Man of Good Hope (written in English) track diasporic movements from the former Italian colonies of Eritrea and Somalia. Focusing on mobility as well as memory, both books trace complicated and unpredictable patterns of forced displacement and precarious settlement. African Titanics charts the journey from Eritrea to the shores of the Mediterranean and the sea crossing to Europe, while A Man of Good Hope follows the movement overland from Somalia to South Africa. Both texts delineate communities networked across national borders and propose an alternative geography formed by cultural commonality rather than geopolitical division. The essay draws on Christina Sharpe’s concept of the ‘wake’ as a means of understanding how migrant subjectivity and community are formed through the multiple forms of racialized violence experienced in transnational mobility.
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31

Vaisman, Alejandro, and Esteban Zimányi. "Mobility Data Warehouses." ISPRS International Journal of Geo-Information 8, no. 4 (April 2, 2019): 170. http://dx.doi.org/10.3390/ijgi8040170.

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The interest in mobility data analysis has grown dramatically with the wide availability of devices that track the position of moving objects. Mobility analysis can be applied, for example, to analyze traffic flows. To support mobility analysis, trajectory data warehousing techniques can be used. Trajectory data warehouses typically include, as measures, segments of trajectories, linked to spatial and non-spatial contextual dimensions. This paper goes beyond this concept, by including, as measures, the trajectories of moving objects at any point in time. In this way, online analytical processing (OLAP) queries, typically including aggregation, can be combined with moving object queries, to express queries like “List the total number of trucks running at less than 2 km from each other more than 50% of its route in the province of Antwerp” in a concise and elegant way. Existing proposals for trajectory data warehouses do not support queries like this, since they are based on either the segmentation of the trajectories, or a pre-aggregation of measures. The solution presented here is implemented using MobilityDB, a moving object database that extends the PostgresSQL database with temporal data types, allowing seamless integration with relational spatial and non-spatial data. This integration leads to the concept of mobility data warehouses. This paper discusses modeling and querying mobility data warehouses, providing a comprehensive collection of queries implemented using PostgresSQL and PostGIS as database backend, extended with the libraries provided by MobilityDB.
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Hansen, Jens B., Jens F. L. Sørensen, Eva N. Glassou, Morten Homilius, and Torben B. Hansen. "Reducing patient–staff contact in fast-track total hip arthroplasty has no effect on patient-reported outcomes, but decreases satisfaction amongst patients with self-perceived complications: analysis of 211 patients." Acta Orthopaedica 93 (January 24, 2022): 264–70. http://dx.doi.org/10.2340/17453674.2022.1617.

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Background and purpose: Several studies have compared fast-track with conventional pathways for total hip arthroplasty (THA) patients, but none have compared different fast-track pathways. Due to COVID-19 restrictions, our department had to minimize patient–staff contact in the THA pathway. First, telephone consultations were implemented instead of an outpatient clinic visit and subsequently preoperative patient education was discontinued. This enabled us to compare patient-reported outcomes and satisfaction among 3 fast-track pathways. Patients and methods: We collected data from patients treated for hip osteoarthritis with THA at Gødstrup Hospital between 2018 and 2021. The patients had experienced 1 of 3 pathways and were interviewed via telephone between 2 and 6 months after discharge. We analyzed the influence of patient pathway on patient-reported pain and mobility level, self-perceived complications, and compliance using logistic regression. We then compared the pathway’s effect on patient satisfaction both for the total sample and for the patients who experienced complications. Results: The amount of patient–staff contact in the patient pathway did not have any influence on patientreported outcomes or the probability of self-perceived complications. For the full sample, patient–staff contact had no statistically significant influence on patient satisfaction either, but for the subgroup of patients experiencing complications, the pathways with less patient–staff contact reducedsatisfaction. Patient satisfaction was primarily related to pain and mobility outcomes. Interpretation: Our results indicate that reducing patient–staff contact in fast-track THA can be done without influencing mobility and pain outcomes, but the overall satisfaction among patients with self-perceived complications will be negatively affected.
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Holden, Erling, Geoffrey Gilpin, and David Banister. "Sustainable Mobility at Thirty." Sustainability 11, no. 7 (April 2, 2019): 1965. http://dx.doi.org/10.3390/su11071965.

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It is now almost three decades since the concept of ‘sustainable mobility’ first appeared in the 1992 EU Green Paper on the Impact of Transport on the Environment. This paper reviews the literature and reflects on how societies’ understanding and interpretation of the concept of sustainable mobility has evolved. We track this evolution over six dimensions: research and policy, transport impacts and categories, scientific disciplines, methodological approach, and research questions. From this review we assert that the mainstream understanding and interpretation of sustainable mobility can be grouped into four generations of studies. The first generation of studies (1992–1993) were techno-centric and focused on how to limit transport’s negative environmental impacts by improving then-existing technology. The second, third and fourth generations of studies (1993–2000, 2000–2010 and 2010–2018 respectively) increasingly acknowledge the limitations of preceding efforts to achieve sustainable mobility, and open for a more diverse set of alternatives. These studies have gradually become more interdisciplinary in nature—reflecting the inter-relatedness of mobility with all other aspects of society. We conclude that despite the ensuing elevation of mobility into the holistic picture society, we still have not achieved a sustainable mobility system. Furthermore, what is much needed now, more than ever, is a bold set of new narratives.
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Dieder, Janaina Andretta, and Gustavo Roese Sanfelice. "Track and field as a tool for social inclusion in Brazil." Concilium 23, no. 3 (March 2, 2023): 11–29. http://dx.doi.org/10.53660/clm-830-23b03.

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This study aims to analyze track and field as a tool for social inclusion. It has a qualitative methodological approach. The data collection instruments were interviews/narratives/biographies conducted with 20 Brazilian Olympic track and field medalists. Based on the athletes' reports, track and field is evidently a great tool for social inclusion because most athletes came from vulnerable social conditions, low income families, which are socially excluded in many aspects. Therefore, they found in track and field an opportunity for upward mobility, which can be maintained to help their families after starting in the sport. Other forms of social inclusion by the sport were also noticed, such as higher education scholarships, knowing new places, peoples, and cultures, as well as support for their families.
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Lewis, Daniel J., Karel Mertens, James H. Stock, and Mihir Trivedi. "High-Frequency Data and a Weekly Economic Index during the Pandemic." AEA Papers and Proceedings 111 (May 1, 2021): 326–30. http://dx.doi.org/10.1257/pandp.20211050.

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This paper describes a weekly economic index (WEI) developed to track the rapid economic developments associated with the onset of and policy response to the novel coronavirus in the United States. The WEI, with its ten component series, tracks the overall economy. Comparing the contributions of the WEI's components in the 2008 and 2020 recessions reveals differences in how the two events played out at a high frequency. During the 2020 collapse and recovery, it provides a benchmark to interpret similarities and differences of novel indicators with shorter samples and/or nonstationary coverage, such as mobility indexes or credit card spending.
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36

Mahalingam, Ilango, and Chandramouli Padmanabhan. "Planar Multi-body Dynamics of a Tracked Vehicle using Imaginary Wheel Model for Tracks." Defence Science Journal 67, no. 4 (June 30, 2017): 460. http://dx.doi.org/10.14429/dsj.67.11548.

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<p class="p1">Off-road vehicles achieve their mobility with the help of a track system. A track has large number of rigid bodies with pin joints leading to computational complexity in modelling the dynamic behaviour of the system. In this paper, a new idea is proposed, where the tracks are replaced by a set of imaginary wheels connected to the road wheels using mechanical links. A non-linear wheel terrain interaction model considering longitudinal slip is used to find out the normal and tangential contact forces. A linear trailing arm suspension, where a road arm connecting the road wheel and chassis with a rotational spring and damper system is considered. The differential algebraic equations (DAEs) from the multi-body model are derived in Cartesian coordinates and formulated using augmented formulation. The augmented equations are solved numerically using appropriate stabilisation techniques. The novel proposition is validated using experimental measurements done on a tracked vehicle.</p>
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37

Zhang, Weiwei. "The History of the National College Entrance Examination Reform and its Impact on Social Mobility." Lecture Notes in Education Psychology and Public Media 7, no. 1 (May 17, 2023): 260–66. http://dx.doi.org/10.54254/2753-7048/7/20220812.

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The National College Entrance Examination is an indispensable part of Chinas education system. There is also a lot of discussion about the college entrance examination. However, the summary of the reform process of the college entrance examination and the analysis of the impact of policies on social mobility in different periods often ignore the first 17 years and the stage of the Cultural Revolution. Therefore, this paper makes a complete policy summary of the college entrance examination, and analyzes the different attributes of social mobility under different policies. These analyses are based on a detailed dissection of the policy and relevant data as supporting material. Finally, the following conclusions are drawn. The dual-track system of education and district-based college entrance examinations from 1949 to 1967 contributed to low social mobility during this time period. During the Cultural Revolution, more rural students went to the cities. However, they often return to their hometowns after finishing their university studies, forming a special phenomenon of mobility. The subsequent single-track system, university enrollment expansion, and the new college entrance examination reform all took equity as the reform goal. However, these reforms often have the opposite effect due to the huge disparity between urban and rural areas. It is worth noting that these deficiencies have been noticed and relevant measures have been implemented.
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38

Hextrum, Kirsten. "Reproducing Sports Stars: How Students Become Elite Athletes." Teachers College Record: The Voice of Scholarship in Education 121, no. 4 (April 2019): 1–38. http://dx.doi.org/10.1177/016146811912100404.

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Background/Context School-sponsored sports programs are seen in both the public and policy spheres as meritocratic mobility institutions. In the U.S. context, athletic participation can yield access to college via sports performance. Meritocratic mobility would be achieved as individuals use their athletic ability and effort to enter universities and in turn improve their social standing. Yet few existing studies empirically examine the extent to which interscholastic athletic participation yields mobility. As a result, little is known about how individuals access colleges via athletics. Purpose/Objective This study's purpose was to understand how individuals began a path to college via sports. In doing so, it asks: what larger social forces influence how youth become top-level college athletes? It draws upon social reproduction theory—how publicly funded educational entities ensure the maintenance rather than the reduction of class inequality—to determine whether youth sports participation facilitates mobility. Research Design This qualitative study examined the athletic and academic trajectories of 47 National Collegiate Athletic Association (NCAA) Division I student-athletes from one university classified as Research-1, Tier-1, and as a member of a power-five athletic conference. Data include semistructured life history interviews, an original database, and institutional reports. Population Participants were recruited from four teams to investigate the athletic selection process: men's and women's track & field and rowing. The teams offered multiple comparisons in macro- and micro-social processes. Rowing draws from White and elite communities, because it requires tremendous resources to participate. Conversely, track & field requires fewer resources and draws more participants from marginalized communities. Findings Research reveals a sports-track-to-college pipeline and a correspondence between White middle-class communities and greater access to elite universities via athletics. Access to the sports-track-to-college pipeline is co-constructed through interactions at the individual, familial, and institutional levels. Five reproductive mechanisms are discussed—community access, bureaucracies, social access, knowledge, and enacted knowledge—all of which emerged as greater determiners for college athletic recruiting than individual athletic merit. Conclusions Recommendations offer policy and programmatic changes at the high school, college, and NCAA levels that make athletic recruiting more transparent and systematic to lessen the reproductive effects.
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39

Nelson, Greg. "Crossing Tentatively from the 'Right' Side of the Track: Dimensions of Mobility." Critical Studies in Education 45, no. 2 (November 1, 2004): 23–45. http://dx.doi.org/10.1080/17508487.2004.9525893.

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40

Nelson, Greg. "Crossing tentatively from the ‘right’ side of the track: Dimensions of mobility." Melbourne Studies in Education 45, no. 2 (November 2004): 23–45. http://dx.doi.org/10.1080/17508487.2004.9558614.

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41

Manika, I., J. Maniks, M. Toulemonde, and K. Schwartz. "Dislocation mobility study of heavy ion induced track damage in LiF crystals." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 267, no. 6 (March 2009): 949–52. http://dx.doi.org/10.1016/j.nimb.2009.02.019.

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42

Hubbard, Ruth E., Eamonn M. P. Eeles, Michael R. H. Rockwood, Nader Fallah, Elyse Ross, Arnold Mitnitski, and Kenneth Rockwood. "Assessing Balance and Mobility to Track Illness and Recovery in Older Inpatients." Journal of General Internal Medicine 26, no. 12 (August 16, 2011): 1471–78. http://dx.doi.org/10.1007/s11606-011-1821-7.

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43

Ryu, H. S., D. S. Bae, J. H. Choi, and A. A. Shabana. "A compliant track link model for high-speed, high-mobility tracked vehicles." International Journal for Numerical Methods in Engineering 48, no. 10 (2000): 1481–502. http://dx.doi.org/10.1002/1097-0207(20000810)48:10<1481::aid-nme959>3.0.co;2-p.

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44

Prayudyanto, Muhammad Nanang. "SUSTAINABILITY INDEX ASSESSMENT OF URBAN TRANSPORT SERVICES IN DEVELOPING CITIES." astonjadro 10, no. 1 (May 2, 2021): 150. http://dx.doi.org/10.32832/astonjadro.v10i1.4268.

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<p>The growth and concentration of motor vehicles in developing cities has led to increased demand for urban mobility. Renewed commitments of Asian cities are required in order to achieve the SDG target on urban mobility as well as to enhance overall sustainability of urban transport systems and services. Cities and countries need to track the progress in improving urban mobility. With a view to support evidence based decision, the paper introduces the Sustainable Urban Transport Index (SUTI) of urban transport services, to help summarize, track and compare the state of urban mobility in Asian cities, as model for developing cities in the world. It also presents the results of pilot application of SUTI in four Asian cities: Greater Jakarta; Kathmandu; Hanoi; and Colombo. The four pilot cities were able to collect data, analyzed and assess the state of urban mobility in their city using SUTI. The assessment result supported policy makers to identify policy gaps, prioritize additional measures and investment strategies required to improve urban transport systems and services in each city. The visual output display in spider diagram was useful to comprehend state of all 10 key indicators in a glace. The pilot study demonstrated the usefulness of SUTI tool and the pilot cities were already using the results of SUTI analysis. In Kathmandu additional efforts are required to improve pedestrian infrastructure and facilities, Colombo needed to improve quality and reliability of public transport system, while Hanoi and Greater Jakarta need to put additional efforts to increase mode share of public transport system.</p>
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45

Hong, Zirong, Weichen Du, and Hong Wang. "Design and Implementation of Path Planning for Wheel-Track Hybrid Mobile Robot." Mobile Information Systems 2022 (June 18, 2022): 1–11. http://dx.doi.org/10.1155/2022/6418706.

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Wheel-track hybrid mobile robot has been widely used because of its high autonomous mobility and its ability to adapt to complex and changeable outdoor environment. Map construction and path planning are the main conditions to achieve its autonomous mobility. Therefore, a wheel-track hybrid robot path planning has been designed and implemented. Simultaneous Localization and Mapping (SLAM) algorithms are used to process the road images captured by the robot’s camera and other sensors. A rapid raster map with Robot Operating System (ROS) was constructed by rapid recognition of key elements from the images with the help of the Oriented Fast and Rotated Brief (ORB) feature vector. The ant colony algorithm with strong optimization ability, high optimization efficiency, and flexible algorithm is used for path planning, and the problem of unfixed location of outdoor obstacles is solved at the same time. The simulation results show that the global performance and convergence speed of the improved algorithm are increased.
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46

Yao, Yu, Kai Cheng, Bangcheng Zhang, Jinhua Lin, Dawei Jiang, and Zhi Gao. "A steering model for articulated tracked vehicle considering soil deformation on track–soil interaction." Advances in Mechanical Engineering 10, no. 10 (October 2018): 168781401880270. http://dx.doi.org/10.1177/1687814018802704.

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With the advantage of steering performance, articulated tracked vehicles have excellent mobility in off-road application. However, in current models for steering performance, soil deformation on the interaction between track and soil cannot always be taken into account. Therefore, steering performance cannot always be calculated accurately. In order to solve the problem, it is essential to propose a steering model which can take the effect of soil deformation on track–soil interaction into consideration. In this article, a steering model of articulated tracked vehicle is proposed on track–soil interaction. Moreover, in order to improve steering performance, a track–soil sub-model is developed that can consider soil deformation on track–soil interaction. Using this steering model based on track–soil sub-model, steering performance can be calculated more accurately. Simulation studies and experimental results are in strong agreement with the theoretical results in this article. The results show that equipped with the track–soil sub-model, the proposed steering model can be used to accurately predict steering performance. The steering model of articulated tracked vehicle proposed in this article can provide a basis for other similar vehicles.
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47

Masoumi, Hamid, and Bradlay Hunt. "Hybrid experimental-numerical methodology for assessment of the building isolation performance." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 264, no. 1 (June 24, 2022): 616–22. http://dx.doi.org/10.3397/nc-2022-787.

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The Building Base Isolation (BBI) indicator proposed in the frame of BIOVIB project, has been examined by means of a hybrid experimental-numerical methodology. A two-story building adjacent to railway track is selected for this study. The building has been isolated at the top of the foundation footings at the ground level. The foundation mobility as well as the transmission loss has been obtained by in-situ measurement and the mobility of the building has been determined by FE modeling of the building.
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48

Wong, J. Y. "Optimization of the Tractive Performance of Articulated Tracked Vehicles Using an Advanced Computer Simulation Model." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 1 (January 1992): 29–45. http://dx.doi.org/10.1243/pime_proc_1992_206_158_02.

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This paper describes the results of a study of the effects of articulation joint configuration, suspension characteristics, location of the centre of gravity and initial track tension on the mobility of a two-unit, articulated tracked vehicle. The study was carried out using a comprehensive computer simulation model known as NTVPM-86. The results show that suspension characteristics, location of the centre of gravity and initial track tension have noticeable effects on the mobility of articulated tracked vehicles over marginal terrain, while the articulation joint angle has a less significant influence on vehicle performance. Locking the articulation joint between the two units of an articulated tracked vehicle usually causes a degradation of tractive performance. The approach to the optimization of the design of articulated tracked vehicles is demonstrated. It is shown that the simulation model NTVPM-86 can play a significant role in the optimization of articulated tracked vehicle design or in the evaluation of vehicle candidates for a given mission and environment.
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Mazumder, Bhashkar. "Intergenerational Mobility in the United States: What We Have Learned from the PSID." ANNALS of the American Academy of Political and Social Science 680, no. 1 (November 2018): 213–34. http://dx.doi.org/10.1177/0002716218794129.

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This article reviews the contributions of the Panel Study of Income Dynamics (PSID) to the study of intergenerational mobility. The PSID enables researchers to track individuals as they form new households and covers many dimensions of socioeconomic status over large portions of the life cycle, making the data ideal for studying intergenerational mobility. Studies have used PSID data to show that the United States is among the least economically mobile countries among advanced economies. The PSID has been instrumental to understanding various dimensions of intergenerational mobility, including occupation; wealth; education; consumption; health; and group differences by gender, race, and region. Studies using the PSID have also cast light on the mechanisms behind intergenerational persistence.
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Foster, Thomas B. "The Persistent Black-White Gap in and Weakening Link between Expecting to Move and Actually Moving." Sociology of Race and Ethnicity 4, no. 3 (September 25, 2017): 353–70. http://dx.doi.org/10.1177/2332649217728374.

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This paper leverages four decades of longitudinal data from the Panel Study of Income Dynamics to document Black-White gaps in the translation of mobility expectations into actual mobility, track those racial gaps over time in the context of declining mobility among all Americans, and identify a substantial weakening in the ability of both Black and White householders to move when they expect to. Results show a substantial racial gap in the realization of mobility expectations with foundations in the relative inability of Black householders to leverage socioeconomic resources in segmented housing markets. There is no indication of significant improvement or growth in this gap over time. While householders’ expressed expectations are the best predictor of future mobility, this predictive relationship has weakened significantly since 1970, primarily because of a decline in mobility among expectant householders. Trends in the expectation of mobility offer support for the notion that declining mobility is indicative of voluntary “rootedness” among Whites but also suggest that a substantial share of Americans (and Blacks in particular) are increasingly likely to be “stuck” expecting to move but unable to do so.
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