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Journal articles on the topic 'Longitudinal'

To see the other types of publications on this topic, follow the link: Longitudinal.

Author: Grafiati

Published: 4 June 2021

Last updated: 7 July 2024

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1

Gera, B., M. Sitarz, and Ya Bolzhelarskyi. "Longitudinal vibrations of viscoelastic longitudinally nonuniform rod under power load distributed along its length." Mathematical Modeling and Computing 3, no. 2 (December 31, 2016): 135–45. http://dx.doi.org/10.23939/mmc2016.02.135.

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2

Campbell, Richard T., Elizabeth Mutran, and Robert Nash Parker. "Longitudinal Design and Longitudinal Analysis." Research on Aging 8, no. 4 (December 1986): 480–502. http://dx.doi.org/10.1177/0164027586008004003.

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3

Kotzian, Bruno, Ives Cavalcante Passos, and Flávio Kapczinski. "Longitudinal course of bipolar disorder." Revista Debates em Psiquiatria Ano 6 (October 1, 2016): 6–8. http://dx.doi.org/10.25118/2236-918x-6-5-1.

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4

Gerdes, B., H. H. Köhler, B. Stinner, P. J. Barth, I. Celik, and M. Rothmund. "Der longitudinale Muskel des Analkanals The anal longitudinal muscle." Der Chirurg 68, no. 12 (December 1997): 1281–85. http://dx.doi.org/10.1007/s001040050360.

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5

Yang, Keming. "Longitudinal Loneliness and Its Risk Factors among Older People in England." Canadian Journal on Aging / La Revue canadienne du vieillissement 37, no. 1 (January 2, 2018): 12–21. http://dx.doi.org/10.1017/s0714980817000526.

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RÉSUMÉCet article présente les trajectoires longitudinales de la solitude associée au vieillissement et modélise les impacts de ses différents facteurs de risques. Les données proviennent des vagues 2 à 6 (2004/5 – 2012/13) de l’Étude longitudinale anglaise sur le vieillissement de la population (English Longitudinal Studies of Ageing; ELSA). Les répondants ayant participé à au moins deux vagues qui ont répondu de manière valide à l’Échelle de solitude de la UCLA (UCLA three-item loneliness scale) ont été inclus dans l’étude (ligne de base : n = 9171). Bien que les statistiques décrivant les changements entre les vagues confirment la stabilité de la solitude dans une optique longitudinale chez les personnes âgées, une attention particulière devrait être portée à la proportion restreinte de personnes âgées qui se retrouvent dans une « solitude longitudinale ». L’état de santé autodéclaré et les relations avec l’époux et les enfants faisaient partie des facteurs de risques significatifs; aussi, les changements dans le lien de proximité avec l’époux affectaient davantage le score de solitude que la perte de l’époux. D’autres recherches devront être menées afin d’identifier les événements personnels et sociaux qui accroissent la solitude des personnes âgées sur le long terme.

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6

Leach, Michael J. "Longitudinal." Medical Journal of Australia 203, no. 7 (October 2015): 307. http://dx.doi.org/10.5694/mja15.00555.

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7

Gudra, Tadeusz, Lukasz Palasz, and Krzysztof J. Opielinski. "Ultrasonic transducers with directional converters of vibration of longitudinal-longitudinal type and longitudinal-longitudinal-longitudinal type intended to work in gaseous media." Journal of the Acoustical Society of America 133, no. 5 (May 2013): 3600. http://dx.doi.org/10.1121/1.4806670.

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8

Sobel, E., S. Levitz, R. Cohen, R. Giorgini, and KT Jules. "Longitudinal epiphyseal bracket: associated foot deformities with implications for treatment." Journal of the American Podiatric Medical Association 86, no. 4 (April 1, 1996): 147–55. http://dx.doi.org/10.7547/87507315-86-4-147.

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The longitudinal epiphyseal bracket is a rare ossification defect of bones of the hands and feet and results in an abnormal epiphysis that is C-shaped, longitudinally oriented, and vertically extends into the diaphysis. The longitudinal epiphyseal bracket may exist as an isolated deformity, but is commonly associated with digital deformities such as polydactyly, duplicated digits, congenital hallux varus, and clinodactyly. Five case histories of children with the longitudinal epiphyseal bracket in different bones of the foot are described with three distinct clinical presentations. The development of the longitudinal epiphyseal bracket and implications for treatment are considered.

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9

Stewart, S. F. C., and D. J. Lyman. "Finite Elasticity Modeling of the Biaxial and Uniaxial Properties of Compliant Vascular Grafts." Journal of Biomechanical Engineering 110, no. 4 (November 1, 1988): 344–48. http://dx.doi.org/10.1115/1.3108451.

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Compliant vascular grafts were modeled by finite elasticity theory. A linear, biaxial model satisfactorily described the stress-strain behavior in inflation tests, where the sample length was fixed longitudinally and inflated. The model was then used to predict the behavior in a longitudinal test (where the longitudinal stretch was varied while keeping the pressure zero), and in a uniaxial test of a circumferential strip. The model satisfactorily predicted the longitudinal Young’s modulus measured in the longitudinal test. The model was less successful in predicting the circumferential Young’s modulus measured in the uniaxial test, possibly because the state of stress was not purely uniaxial.

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10

Havens, Betty. "Overview of Longitudinal Research on Aging." Canadian Journal on Aging / La Revue canadienne du vieillissement 14, S1 (1995): 119–34. http://dx.doi.org/10.1017/s0714980800005468.

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RÉSUMÉCet article est une courte introduction sur les méthodes de recherche et l'analyse des données longitudinales en gérontologie. On y présente les questions de recherche gérontologique qui exigent une étude longitudinale et démontre que l'utilisation de l'analyse de données secondaires est sur le point de devenir essentielle pour ces études. Ces analyses fournissent la possibilité de maximiser tant les stratégies de recherche longitudinale que les possibilités de recherche. L'importance d'une stabilité administrative et financière en vue de maintenir les bases de données pour les recherches longitudinales est mise en lumière à l'aide d'exemples. L'article comprend également un compte rendu des principales études longitudinales canadiennes sur le vieillissement et de certaines études entreprises à l'étranger. Finalement, on cite bon nombre de sources de données quantitatives et qualitatives.

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11

Huang, Guoping, Jianhua Hu, Haibo Liu, and Xiugui Sun. "Girder Longitudinal Movement and Its Factors of Suspension Bridge under Vehicle Load." Advances in Civil Engineering 2021 (October 1, 2021): 1–14. http://dx.doi.org/10.1155/2021/1443996.

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Vehicle load may not only cause vertical deformation and vibration of suspension bridge but also lead to longitudinal deformation and vibration. And the longitudinal behavior is closely related to the durability of the girder end devices and the bending fatigue failure of suspenders. In this study, the longitudinal deformation behavior and longitudinal vibration of suspension bridge under vehicles, as well as the related influencing factors, are investigated. The underlying mechanism of girder longitudinal movement under the moving vehicles is revealed. Based on the simplified vehicle model of vertical concentrated force, the characteristics of main cable deformation and girder longitudinal displacement under vertical loads are analyzed first. Then, the longitudinal motion equation of the girder under vertical moving loads is derived. Finally, a single long-span suspension bridge is employed in the case study, and the girder longitudinal response and influencing factors are investigated based on both numerical simulation and field monitoring. Results indicate that the asymmetric vertical load leads to cable longitudinal deflection owing to the geometrically nonlinear characteristic of the main cable, leading to longitudinal movement of the girder. The results of field monitoring and numerical simulation indicate that the girder moves quasi-statically and reciprocates longitudinally with centimeter amplitude under normal operational loads.

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12

Kuo, Pei-Lun, Jennifer A. Schrack, Morgan E. Levine, Michelle D. Shardell, Eleanor M. Simonsick, Chee W. Chia, Ann Zenobia Moore, et al. "Longitudinal phenotypic aging metrics in the Baltimore Longitudinal Study of Aging." Nature Aging 2, no. 7 (July 2022): 635–43. http://dx.doi.org/10.1038/s43587-022-00243-7.

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AbstractTo define metrics of phenotypic aging, it is essential to identify biological and environmental factors that influence the pace of aging. Previous attempts to develop aging metrics were hampered by cross-sectional designs and/or focused on younger populations. In the Baltimore Longitudinal Study of Aging (BLSA), we collected longitudinally across the adult age range a comprehensive list of phenotypes within four domains (body composition, energetics, homeostatic mechanisms and neurodegeneration/neuroplasticity) and functional outcomes. We integrated individual deviations from population trajectories into a global longitudinal phenotypic metric of aging and demonstrate that accelerated longitudinal phenotypic aging is associated with faster physical and cognitive decline, faster accumulation of multimorbidity and shorter survival. These associations are more robust compared with the use of phenotypic and epigenetic measurements at a single time point. Estimation of these metrics required repeated measures of multiple phenotypes over time but may uniquely facilitate the identification of mechanisms driving phenotypic aging and subsequent age-related functional decline.

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13

Geng, Fangfang, Youliang Ding, and Aiqun Li. "Passive Control System for Mitigation of Longitudinal Buffeting Responses of a Six-Tower Cable-Stayed Bridge." Mathematical Problems in Engineering 2016 (2016): 1–18. http://dx.doi.org/10.1155/2016/6497851.

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This paper presents an investigation of mitigation of longitudinal buffeting responses of the Jiashao Bridge, the longest multispan cable-stayed bridge in the world. A time-domain procedure for analyzing buffeting responses of the bridge is implemented in ANSYS with the aeroelastic effect included. The characteristics of longitudinal buffeting responses of the six-tower cable-stayed bridge are studied in some detail, focusing on the effects of insufficient longitudinal stiffness of central towers and partially longitudinal constraints between the bridge deck and part of bridge towers. The effectiveness of viscous fluid dampers on the mitigation of longitudinal buffeting responses of the bridge is further investigated and a multiobjective optimization design method that uses a nondominating sort genetic algorithm II (NSGA-II) is used to optimize parameters of the viscous fluid dampers. The results of the parametric investigations show that, by appropriate use of viscous fluid dampers, the top displacements of central towers and base forces of bridge towers longitudinally restricted with the bridge deck can be reduced significantly, with hampering the significant gain achieved in the base forces of bridge towers longitudinally unrestricted with the bridge deck. And the optimized parameters for the viscous fluid dampers can be determined from Pareto-optimal fronts using the NSGA-II that can satisfy the desired performance requirements.

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14

Šlogar, Helena. "Longitudinal research." Zbornik Veleučilišta u Rijeci 10, no. 1 (2022): 111–28. http://dx.doi.org/10.31784/zvr.10.1.7.

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The aim of this study is to conduct a longitudinal reasearch into the influence between market orientation, innovativeness and business performance. The study endevours to examine possible changes in the model of the influence of market orientation on innovativeness and business performance in the 2016-2019 period in Croatian companies. To analyse data, we used regression and covariance analysis. The results show that the influence of market orientation, competitor orientation and interfunctional coordination on innovativeness and business performance did not exhibit statistically significant differences in the 2016-2019 period in Croatian companies. At the same time the influence of customer orientation on innovativeness, product innovation, business system innovativeness and on business performance showed a signifcant statistical change. Empirical results provide consequential theoretical implications and implications for the management in implementing market orientation, which would allow for the increase in company competitiveness on the market.

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15

Cohen, Philip R. "Longitudinal Erythronychia." American Journal of Clinical Dermatology 12, no. 4 (August 2011): 217–31. http://dx.doi.org/10.2165/11586910-000000000-00000.

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16

Demarzo, Marcelo Marcos Piva, Bruno José Barcellos Fontanella, Débora Gusmão Melo, Lucimar Retto da Silva de Avó, Renata Giannecchini Bongiovanni Kishi, Augustus Tadeu Relo de Mattos, Petterson de Jesus Floriano, and Guilherme Arantes Mello. "Internato Longitudinal." Revista Brasileira de Educação Médica 34, no. 3 (September 2010): 430–37. http://dx.doi.org/10.1590/s0100-55022010000300013.

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O internato médico tem gerado recorrente debate frente às transformações curriculares em andamento no País. A despeito das discussões, um modelo de internato consonante com essas mudanças ainda não foi consistentemente delineado. Neste ensaio, trazemos uma proposta de matriz estruturante para o internato médico. Propomos que o internato médico seja realizado durante os seis anos do curso, de forma longitudinal, tendo como eixo estruturante a clínica da Atenção Básica (AB). Esse modelo de "internato longitudinal" prevê a introdução progressiva na prática clínica, iniciando-se pela AB nos dois primeiros anos, acrescentando-se progressivamente os ambulatórios de especialidades, os estágios hospitalares e demais atividades práticas, alcançando-se, dessa forma, o rol de diversidade e complexidade previsto para o egresso da escola médica.

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17

Orzechowski, Nicole M., and Clement J. Michet. "Longitudinal Myelitis." Mayo Clinic Proceedings 83, no. 3 (March 2008): 350. http://dx.doi.org/10.4065/83.3.350.

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18

HANEKE, ECKART, and ROBERT BARAN. "Longitudinal Melanonychia." Dermatologic Surgery 27, no. 6 (June 2001): 580–84. http://dx.doi.org/10.1097/00042728-200106000-00014.

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19

EDELMAN, SIDNEY K. "Longitudinal Resolution." Echocardiography 5, no. 4 (July 1988): 269–72. http://dx.doi.org/10.1111/j.1540-8175.1988.tb00263.x.

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20

Shepherd, Peter, and Scott Menard. "Longitudinal Research." Contemporary Sociology 20, no. 6 (November 1991): 960. http://dx.doi.org/10.2307/2076231.

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21

Robinson, C. S. L. "LONGITUDINAL VIBRATION." Journal of the American Society for Naval Engineers 61, no. 4 (March 18, 2009): 883–86. http://dx.doi.org/10.1111/j.1559-3584.1949.tb02663.x.

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22

Robinson, C. S. L. "LONGITUDINAL VIBRATION." Journal of the American Society for Naval Engineers 61, no. 3 (March 18, 2009): 597–98. http://dx.doi.org/10.1111/j.1559-3584.1949.tb02813.x.

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23

Scheike, Thomas H., and Torben Martinussen. "longitudinal data." Annals of Statistics 28, no. 4 (August 2000): 1000–1025. http://dx.doi.org/10.1214/aos/1015956705.

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24

André, Josette, and Sophie Goettman-Bonvallot. "Longitudinal melanonychia." Journal of the American Academy of Dermatology 49, no. 4 (October 2003): 776. http://dx.doi.org/10.1067/s0190-9622(02)61466-5.

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25

Baran, R. "Longitudinal Melanonychia." Dermatology 186, no. 2 (1993): 83. http://dx.doi.org/10.1159/000247312.

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26

Colombini, Marco, and Gary Parker. "Longitudinal streaks." Journal of Fluid Mechanics 304 (December 10, 1995): 161–83. http://dx.doi.org/10.1017/s0022112095004381.

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A commonly observed bedform in wide erodible-bed channels consists of rows of streaks or stripes parallel to the flow. These stripes can be manifested in terms of transverse variation of bed elevation, characteristic grain size (and thus roughness or both. The former case is manifested most strongly in sediment with a nearly uniform size distribution and the latter most strongly in sediment with substantial heterogeneity in size. The amplitude of stripes is rarely larger than one or two grain diameters, and the transverse spacing is invariably of the order of the flow depth. They are closely linked to a pattern of paired cells of secondary flow in the flow cross-section.An existing theory of streak formation for the case of uniform sediment relies on a second-order turbulence closure which explicitly links the streamwise flow to transverse variations in bed elevation. The theory successfully predicts the formation of streaks, but only at rather high values of the Shields stress, i.e. rather strong sediment transport. Streaks are commonly observed, however, at Shields stresses as low as only slightly above the threshold of motion.In the present analysis the previous flow model is adapted to the case of transverse variation of roughness as well as elevation, and the constraint of uniform sediment is removed. The theory indicates that allowance for even slight heterogeneity of bed sediment results in the formation of streaks at any Shields stress above the threshold of motion. The resulting streaks are hybrid in the sense that they show transverse variation in both elevation and roughness. The model thus provides a general theory of streak formation.

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27

Gómez Vázquez, Mercedes, Ramón Navarra Amayuelas, and Gustavo Tapia Melero. "Eritroniquia longitudinal." Piel 26, no. 5 (May 2011): 236–37. http://dx.doi.org/10.1016/j.piel.2011.01.004.

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28

López, David Pedrazas, David García Font, and Bernat de Pablo Márquez. "Melanoniquia longitudinal." FMC - Formación Médica Continuada en Atención Primaria 25, no. 7 (August 2018): 411–13. http://dx.doi.org/10.1016/j.fmc.2017.07.007.

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29

Di Chiacchio, Nilton, Beth S. Ruben, and Walter Refkalevsky Loureiro. "Longitudinal melanonychias." Clinics in Dermatology 31, no. 5 (September 2013): 594–601. http://dx.doi.org/10.1016/j.clindermatol.2013.06.007.

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30

GALLAGHER, JAMES J. "Longitudinal Interventions." American Behavioral Scientist 34, no. 4 (March 1991): 431–39. http://dx.doi.org/10.1177/0002764291034004004.

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31

Haneke, Eckart, and Robert Baran. "Longitudinal Melanonychia." Dermatologic Surgery 27, no. 6 (July 18, 2008): 580–84. http://dx.doi.org/10.1111/j.1524-4725.2001.01916.x.

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32

Jellinek, Nathaniel J., and Shari R. Lipner. "Longitudinal Erythronychia." Dermatologic Surgery 42, no. 3 (March 2016): 310–19. http://dx.doi.org/10.1097/dss.0000000000000594.

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33

Greenberg, David F. "Longitudinal Criminology." Journal of Quantitative Criminology 26, no. 4 (September 23, 2010): 437–43. http://dx.doi.org/10.1007/s10940-010-9111-9.

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34

Lumens, Joost, Frits W. Prinzen, and Tammo Delhaas. "Longitudinal Strain." JACC: Cardiovascular Imaging 8, no. 12 (December 2015): 1360–63. http://dx.doi.org/10.1016/j.jcmg.2015.08.014.

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35

Geier, Anne-Kathrin, Thomas Frese, and Tobias Deutsch. "Longitudinal Continuity." Journal of General Internal Medicine 34, no. 11 (August 16, 2019): 2302. http://dx.doi.org/10.1007/s11606-019-05272-4.

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36

Nathan, Miriam. "Longitudinal Continuity." Journal of General Internal Medicine 34, no. 11 (August 27, 2019): 2303. http://dx.doi.org/10.1007/s11606-019-05273-3.

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37

Ford, Christine D., Premal G. Patel, Victor S. Sierpina, Mark W. Wolffarth, and Judith L. Rowen. "Longitudinal Continuity." Journal of General Internal Medicine 34, no. 11 (August 13, 2019): 2304. http://dx.doi.org/10.1007/s11606-019-05274-2.

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38

Duncan, Susan C., Terry E. Duncan, and Hyman Hops. "Analysis of longitudinal data within accelerated longitudinal designs." Psychological Methods 1, no. 3 (1996): 236–48. http://dx.doi.org/10.1037/1082-989x.1.3.236.

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39

Scurtu, Petru Razvan, Mike Clark, and Jean W. Zu. "Coupled longitudinal and transverse vibration of automotive belts under longitudinal excitations using analog equation method." Journal of Vibration and Control 18, no. 9 (September 30, 2011): 1336–52. http://dx.doi.org/10.1177/1077546311418866.

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There are many studies on vibrations of moving belts originated from automotive belt drives. These studies, however, mainly consider the nonlinear effect of the transversal vibration of the belt under transversal excitation without considering the coupling effect between the transversal and longitudinal vibrations under longitudinal excitation. In this paper, a nonlinear model is built for a standing tensioned belt periodically excited longitudinally at one end with a known amplitude and frequency and with the other end clamped, which allows for coupling between the periodic longitudinal excitation and transversal vibration. The nonlinear system is solved using the Analog Equation Method. The two coupled nonlinear hyperbolic differential equations of the system are reduced to two uncoupled linear equations pertaining to the longitudinal and transverse deformation of a substitute beam with unit longitudinal and bending stiffness, respectively. The reduced equations are under a fictitious time-dependent load distribution with the same boundary and initial conditions. The fictitious forces are established numerically from the integral expression of the oscillation solution with the requirement that the equations of motion be satisfied at discreet time intervals. It is found that the transversal vibration appears as a stable and predictable beating phenomenon due to an internal resonance from the periodic energy transfer between the longitudinal excitation and the transversal vibration, which manifests itself as a standing wave.

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40

Archer, Branch T., Yu-Hsuan Chao, John M. Cormack, Kang Kim, Kyle S. Spratt, and Mark F. Hamilton. "Surface excitation of focused shear wave beams in soft elastic media: Theory." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A46. http://dx.doi.org/10.1121/10.0015489.

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Shear wave propagation is employed in medical ultrasound imaging, because it reveals variation in the viscoelastic properties of tissue. Frequencies below 1 kHz are required for imaging with shear waves in soft tissue due to their high attenuation and low propagation speeds, compared to compressional waves with frequencies above 1 MHz used for ultrasound imaging. Shear waves exhibiting particle motion in the direction of propagation, referred to as longitudinally polarized shear waves, can be generated by applying longitudinal motion of a circular disk to the surface of a soft elastic medium. This approach is used in practice because it permits imaging of the longitudinal shear wave with a conventional ultrasound transducer that is coaxial with the source of the shear wave. Presented here are the theoretical framework and numerical simulations that illustrate effects of focusing on longitudinally polarized shear waves. Longitudinal, transverse, radial, and torsional source polarizations are considered. The present investigation was motivated initially by an experimental study in optics due to Dorn et al. [Phys. Rev. Lett. 91, 233901 (2003)]. Our predictions for shear wave beams support their measurements of light beams revealing that the longitudinal electric field component produces a smaller focal spot than the transverse field component.

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41

Zhudenkov, Kirill, Sergey Gavrilov, Kirill Peskov, Gabriel Helmlinger, and Sergey Aksenov. "Longitudinal tumor size and NLR as predictive factors of individual survival compared to their baseline values in patients with non-small cell lung cancer treated with durvalumab." Journal of Clinical Oncology 37, no. 15_suppl (May 20, 2019): e20047-e20047. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e20047.

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e20047 Background: Our ability to accurately predict survival of patients with non-small cell lung cancer (NSCLC) while on treatment is limited. Prognostic markers such as stage and tumor size are well established, while neutrophil-to-lymphocytes ratio (NLR) and other hemogram measurements have recently been studied. Gain in prognostic accuracy of these markers when measured longitudinally has not been established. Methods: There were 679 NSCLC patients (Stage 3 or 4, ECOG PS 0 or 1) from clinical studies of durvalumab 10 mg/kg every two weeks (NCT02087423 and NCT01693562). We developed three models of overall survival (OS) all with ECOG as covariate: a Cox proportional hazards model with baseline tumor sum-of-longest-diameters (SLD) and NLR as covariates (COX); a joint model of OS and longitudinal SLD and baseline NLR (JM SLD); and a joint model of OS and longitudinal SLD and NLR (JM SLD&NLR). We compared prognostic accuracy of these markers measured longitudinally vs. at baseline, using predicted probability of OS at 12 months after start of durvalumab as a prognostic score. We evaluated predictive performance of the models using area under the receiver-operating characteristic curve (ROC AUC) describing trade-off between true and false positives (i.e., survival past 12 months). The AUCs were calculated for patients in the dataset using longitudinal data up to different cut-offs. Results: The AUC for all patients starting durvalumab using baseline ECOG, SLD and NLR was 0.73, while it decreased to 0.64 for patients surviving to 6 months, compared to 0.50 for noninformative models. The AUC using longitudinal information for SLD and NLR was larger the more longitudinal data was used for prediction and was 0.81 using 6 months’ worth of data. Conclusions: Using longitudinal information for SLD and NLR increased individual predictive performance of these markers compared to only baseline information in NSCLC patients. [Table: see text]

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42

Hamilton, Graham A., and Lawrence A. Ford. "Longitudinal Tear of the Tibialis Anterior Tendon." Journal of the American Podiatric Medical Association 95, no. 4 (July 1, 2005): 390–93. http://dx.doi.org/10.7547/0950390.

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Diagnosis and treatment of longitudinal tears of the tibialis anterior tendon are not well documented in the surgical literature. Described here is successful primary surgical repair of a longitudinally torn tibialis anterior tendon in a 60-year-old woman. (J Am Podiatr Med Assoc 95(4): 390–393, 2005)

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43

Houston, S. S. "Longitudinal stability of gyroplanes." Aeronautical Journal 100, no. 991 (January 1996): 1–6. http://dx.doi.org/10.1017/s0001924000027196.

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AbstractThe class of aircraft known as gyroplanes (or autogyros) helped to pave the way for the development of the helicopter. However, they have found no application in contemporary commercial or military aviation. It is in recreational or sport flying that the gyroplane has proved popular. Most if not all designs are however homebuilts, and as a consequence little analysis of any significance has been conducted on the flight mechanics of these aircraft. This Paper presents an analysis of the longitudinal stability of gyroplanes. Simple consideration of the basic forces and moments that might influence stability, in the context of elementary rotor behaviour, is used to assess the fundamental nature of gyroplane longitudinal stability. This is quantified by the application of a sophisticated generic rotorcraft mathematical model to the gyroplane problem. It is concluded that the basic configuration can be longitudinally stable with appropriate design, and that the rotorspeed degree of freedom must also be included when modelling the aircraft.

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44

Mannava, Kathleen A., Sandeep Mannava, L. Andrew Koman, Leslie Robinson-Bostom, and Nathaniel Jellinek. "LONGITUDINAL MELANONYCHIA: DETECTION AND MANAGEMENT OF NAIL MELANOMA." Hand Surgery 18, no. 01 (January 2013): 133–39. http://dx.doi.org/10.1142/s0218810413300015.

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Malignant melanoma of the nail confers a higher mortality rate compared to other cutaneous melanomas, which is often attributable to delayed diagnosis. Two-thirds of nail melanomas present as longitudinal melanonychia (LM), longitudinally-oriented brown-black bands of pigment in the nail plate. This article delineates the appropriate clinical approach toward evaluation and management of a patient with longitudinal melanonychia, which includes determining risk factors for melanoma, recognizing scenarios in which biopsy is indicated, selecting the appropriate biopsy technique, and managing a patient in whom the diagnosis of nail melanoma has been made.

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Masouleh, Sepehr Akhavan, Tracy Holsclaw, Babak Shahbaba, and Daniel L. Gillen. "A Flexible Joint Longitudinal-Survival Model for Analyzing Longitudinally Sampled Biomarkers." Open Journal of Statistics 11, no. 05 (2021): 778–805. http://dx.doi.org/10.4236/ojs.2021.115046.

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Wang, Wen-Yue, Tian-Yu Cheng, Zhen-Xu Bai, Shuo Liu, and Jia-Qi Lü. "Vector Optical Beam with Controllable Variation of Polarization during Propagation in Free Space: A Review." Applied Sciences 11, no. 22 (November 12, 2021): 10664. http://dx.doi.org/10.3390/app112210664.

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The vector optical beam with longitudinally varying polarization during propagation in free space has attracted significant attention in recent years. Compared with traditional vector optical beams with inhomogeneous distribution of polarization in the transverse plane, manipulating the longitudinal distribution of polarization provides a new dimension for the expansion of the applications of vector optical beams in volume laser machining, longitudinal detection, and in vivo micromanipulation. Two theoretical strategies for achieving this unique optical beam are presented in the way of constructing the longitudinally varying phase difference and amplitude difference. Relevant generation methods are reviewed which can be divided into the modulation of complex amplitude in real space and the filtering of the spatial spectrum. In addition, current problems and prospects for vector optical beams with longitudinally varying polarization are discussed.

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Zonfrillo, Mark R., James G. Linakis, Eunice S. Yang, and Michael J. Mello. "A Systematic Review of Longitudinal Cohort Studies Examining Unintentional Injury in Young Children." Global Pediatric Health 5 (January 1, 2018): 2333794X1877421. http://dx.doi.org/10.1177/2333794x18774219.

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Objective. Injury is the leading cause of death and long-term disability in children. Longitudinal cohorts are designed to follow subjects longitudinally in order to determine if early-life exposures are related to certain health outcomes. Methods. We conducted a systematic review to identify studies of children from birth through 5 years who were followed longitudinally with unintentional injury as an outcome of interest. Results. Of the 1892 unique references based on the search criteria, 12 (published between 2000 and 2013) were included. The studies varied on the population of focus, injury definition, and incidence rates. Existing studies that longitudinally follow children aged 0 to 5 years are limited in number, scope, and generalizability. Conclusions. Further study using population-based longitudinal cohorts is necessary to more comprehensively estimate incidence of injury in young children.

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Neynaber, Sven, Hans Wolff, Gerd Plewig, and Ralf Wienecke. "Longitudinale Melanonychie bei Einnahme von Hydroxycarbamid. Longitudinal melanonychia induced by hydroxyurea therapy." Journal der Deutschen Dermatologischen Gesellschaft 2, no. 7 (July 2004): 588–91. http://dx.doi.org/10.1046/j.1439-0353.2004.04093.x.

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Fangfang, Geng, and Ding Youliang. "Multiobjective Optimal Control of Longitudinal Seismic Response of a Multitower Cable-Stayed Bridge." Shock and Vibration 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/6217587.

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The dynamic behavior of a multitower cable-stayed bridge with the application of partially longitudinal constraint system using viscous fluid dampers under real earthquake ground motions is presented. The study is based on the dynamic finite element model of the Jiashao Bridge, a six-tower cable-stayed bridge in China. The prime aim of the study is to investigate the effectiveness of viscous fluid dampers on the longitudinal seismic responses of the bridge and put forth a multiobjective optimization design method to determine the optimized parameters of the viscous fluid dampers. The results of the investigations show that the control objective of the multitower cable-stayed bridge with the partially longitudinal constraint system is to yield maximum reductions in the base forces of bridge towers longitudinally restricted with the bridge deck, with slight increases in the base forces of bridge towers longitudinally unrestricted with the bridge deck. To this end, a multiobjective optimization design method that uses a nondominating sort genetic algorithm II (NSGA-II) is used to optimize parameters of the viscous fluid dampers. The effectiveness of the proposed optimization design method is demonstrated for the multitower cable-stayed bridge with the partially longitudinal constraint system, which reveals that a design engineer can choose a set of proper parameters of the viscous fluid dampers from Pareto optimal fronts that can satisfy the desired performance requirements.

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Moloney, David, Silvin P. Knight, Louise Newman, Rose Anne Kenny, and Roman Romero-Ortuno. "Eight Orthostatic Haemodynamic Patterns in The Irish Longitudinal Study on Ageing (TILDA): Stability and Clinical Associations after 4 Years." Geriatrics 6, no. 2 (May 11, 2021): 50. http://dx.doi.org/10.3390/geriatrics6020050.

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Previous research cross-sectionally characterised eight morphological systolic blood pressure (SBP) active stand (AS) patterns using a clinical clustering approach at Wave 1 (W1) of the Irish Longitudinal Study on Ageing. We explored the longitudinal stability and clinical associations of these groupings at Wave 3 (W3), four years later. Eight AS groups had their clinical characteristics and AS patterns at W3 compared to W1. We explored longitudinal associations (new cognitive decline, falls, syncope, disability, and mortality) using multivariate logistic regression models. In total, 2938 participants (60% of Wave 1 sample) had adequate AS data from both W1 and 3 for analysis. We found no longitudinal stability of the eight AS groups or their morphological patterns between the waves. A pattern of impaired stabilisation and late deficit seemed more preserved and was seen in association with new cognitive decline (OR 1.63, 95% CI: 1.12–2.36, p = 0.011). An increase in antihypertensive usage seemed associated with reduced immediate SBP drops, improved AS patterns, and reduced orthostatic intolerance (OI). In pure longitudinal groups, AS patterns were not preserved after 4 years. AS patterns are longitudinally dynamic, and improvements after 4 years are possible even in the presence of higher antihypertensive burden.

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