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Thematische Bibliographien / Longitudinal position of center of mass / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Longitudinal position of center of mass“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Zhang, Zhiguo, Guodong Yin, and Zhixin Wu. "Joint Estimation of Mass and Center of Gravity Position for Distributed Drive Electric Vehicles Using Dual Robust Embedded Cubature Kalman Filter." Sensors 22, no. 24 (2022): 10018. http://dx.doi.org/10.3390/s222410018.

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The accurate estimation of the mass and center of gravity (CG) position is key to vehicle dynamics modeling. The perturbation of key parameters in vehicle dynamics models can result in a reduction of accurate vehicle control and may even cause serious traffic accidents. A dual robust embedded cubature Kalman filter (RECKF) algorithm, which takes into account unknown measurement noise, is proposed for the joint estimation of mass and CG position. First, the mass parameters are identified based on directly obtained longitudinal forces in the distributed drive electric vehicle tires using the who

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Sakhno, Volodymyr, Victor Poljakov, Svitlana Sharai, and Iruna Tchovcha. "Influence of the position of the center of mass of a trailer category O1 on the stability of the road train." Journal of Mechanical Engineering and Transport 14, no. 2 (2022): 111–20. http://dx.doi.org/10.31649/2413-4503-2021-14-2-111-120.

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In a number of operational properties of motor vehicle (ATZ) at the tendency of increase of speeds of movement the most important indicators of the kept quality, in any modes, are stability and controllability. The choice of constructive parameters of ATZ providing these properties increases active safety of operation and reduces probability of road accidents during the execution of transport operations. From the point of view of practical purposes at operation of ATZ not only the reason of infringement of stability becomes important, and reaction of ATZ to it and control actions of the driver

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3

Mbou, E. Tiaya, E. Njeugna, A. Kemajou, N. R. Tagne Sikame, and D. Ndapeu. "Modelling of the Water Absorption Kinetics and Determination of the Water Diffusion Coefficient in the Pith ofRaffia viniferaof Bandjoun, Cameroon." Advances in Materials Science and Engineering 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/1953087.

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The present work focuses on the study of the water absorption phenomenon through the pith ofRaffia viniferaalong the stem. The water absorption kinetics was studied experimentally by the gravimetric method with the discontinuous control of the sampling mass at temperature of 30°C. The samples of 70 mm × 8 mm × 4 mm were taken from twelve sampling zones of the stem ofRaffia vinifera. The result shows that the percentage of water absorption of the pith ofRaffia viniferaincreases from the periphery to the center in the radial position and from the base to the leaves in the longitudinal position.

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Bazhukov, Artem, Vladimir Rolle, Polina Stepina, Stanislav Akhmetshin, Adel Yakushev, and Alexandra Orekhovskaya. "Estimated assessment of the static position of the hull with a change in the pre-tensioning force of the tracks." E3S Web of Conferences 471 (2024): 05004. http://dx.doi.org/10.1051/e3sconf/202447105004.

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The article proposes a method for calculating the static position of the machine body. The mathematical model of the running gear is given. The dependence of the position of the center of mass in height relative to the ground on the pre-tension forces, as well as the angular deviation of the longitudinal axis of the hull from the horizontal position, is shown. A control calculation was performed, the results of which are presented in the form of graphical dependencies. The numerical experiment was carried out on the example of a tracked vehicle of a light category with a rear drive wheel.

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Zhang, Xue Yan, and Wen Ming Zhang. "Vibration Simulation of Articulated Dump Truck with the Variation of Longitudinal Center of Gravity Position of Rear Sprung Mass and Rear Suspension Stiffness." Advanced Materials Research 383-390 (November 2011): 1812–18. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1812.

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The paper is concerned with the vibration for the articulated dump truck (ADT) which is multi-axle vehicle and different from rigid dump truck. The balanced suspension was employed as the rear suspension in the 60t ADT which the paper takes as the research object. A vibration model of 6 dof for the truck was proposed. The impact of the variation of longitudinal center of gravity position of rear sprung mass and rear suspension stiffness on vibration was investigated in stochastic excitation of the truck in the frequency domain. It is found that it is beneficial to the comfort of the truck when

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Skrucany, Tomas, Jan Vrabel, and Patrik Kazimir. "The influence of the cargo weight and its position on the braking characteristics of light commercial vehicles." Open Engineering 10, no. 1 (2020): 154–65. http://dx.doi.org/10.1515/eng-2020-0024.

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AbstractThe influence of the cargo weight loaded on the vehicle and the total gross mass of the vehicle on the braking characteristics is often researched from the road safety reason. However, there is not enough knowledge about the influence of weight and load distribution on the loading area of small trucks or vans on their braking characteristics. This article presents the results of measurements of braking decelerations of the van of N1 category and the braking characteristics of a vehicle loaded with different cargo mass with different cargo locations on the loading area. The impact of th

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Dou, Yilin, Kelei Wang, Zhou Zhou, Peter R. Thomas, Zhuang Shao, and Wanshan Du. "Investigation of the Free-Fall Dynamic Behavior of a Rectangular Wing with Variable Center of Mass Location and Variable Moment of Inertia." Aerospace 10, no. 5 (2023): 458. http://dx.doi.org/10.3390/aerospace10050458.

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In recent years, the air-drop launch technology of near-space UAVs has attracted much attention. Between downfall from the carrier and the flight control system’s initiation, the UAV presents free-fall movement. This free-fall process is very important for the control effect of the flight control system and is also crucial for the safety of the UAV and the carrier. Focus is required on two important dynamic parameters of the UAV: the moment of inertia and the center of mass position. In this paper, we used a quasi-steady model proposed by predecessors to address the flat-plate falling problem

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Muis, Jasper. "The Rise and Demise of the Dutch Extreme Right: Discursive Opportunities and Support for the Center Democrats in the 1990s." Mobilization: An International Quarterly 20, no. 1 (2015): 41–60. http://dx.doi.org/10.17813/maiq.20.1.f211773qm103w030.

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This article seeks to explain why the Dutch extreme-right party, Center Democrats (CD), never succeeded in breaking out of its marginal position. It argues that, in addition to analyzing fluctuations in electoral support, scholars should also examine the degree to which extreme-right parties are able to express their views in the mass media. Supply-side explanations are extended by showing that discursive political opportunities need to be openly acknowledged and debated publicly to become relevant. Relying on longitudinal data derived from political claims analysis and opinion polls, this art

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Shahzad, Aamir, Aniqa Shah, and Shamsul Haq. "Heat and Mass Transfer of Viscous Fluid in a Permeable Channel with Reabsorbing Walls." International Journal of Emerging Multidisciplinaries: Mathematics 1, no. 3 (2022): 74–87. http://dx.doi.org/10.54938/ijemdm.2022.01.3.114.

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An analytical investigation is made to determine the heat and mass transfer mechanism of non-isothermal highly viscous uid in a long narrow porous channel. The walls of the channel are maintained at the same temperature. The mathematical model is developed by using the continuity, momentum, energy and diffusion equations. Analytical solutions are establish to get the expressions of velocity eld, pressure distribution, mass ow rate, wall shear stress, temperature profile, mass concentration distribution as well as the heat transfer rate (Nusselt number) and mass transfer rate (Sherwood number)

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Seeram, Madhuri, and Pramod Kumar. "Free Vibration Analysis of Symmetric and Asymmetric RCC Structures." IOP Conference Series: Materials Science and Engineering 1273, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1757-899x/1273/1/012010.

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Abstract Symmetric and asymmetric structures behave differently under external loads even though they are of an equal number of stories or equal in dimensions. It is necessary to estimate the dynamic properties of the asymmetric structures carefully to avoid failure. Modal analysis for symmetric and asymmetric multi-storied reinforced concrete (RC) buildings is very essential to assess the dynamic characteristics of the structure. The plan asymmetric buildings with the shift of core from a central position to different positions and vertical asymmetry with the mass variation in vertical direct

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Al-Solihat, Mohammed Khair, Meyer Nahon, and Kamran Behdinan. "Three-dimensional nonlinear coupled dynamic modeling of a tip-loaded rotating cantilever." Journal of Vibration and Control 24, no. 22 (2018): 5366–78. http://dx.doi.org/10.1177/1077546317753058.

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This paper presents a general three-dimensional flexible dynamic model of a tip-loaded rotating cantilever beam. For generality, the beam tip is assumed to be loaded with a rigid body with an arbitrary center of mass position, and subject to external force and moment. The coupled longitudinal (axial), bending–bending, and twist elastic motions are considered to formulate the system dynamics. The beam structural internal damping is modeled utilizing Rayleigh’s dissipation function. As well, the influence of gravity is considered. A symbolic code is developed to derive the equations of motion, a

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Sagalovich, S. A., V. V. Kremenchutsky, and D. Yu Strelets. "Research of the influence of the volumetric-mass layout of the aircraft on the dynamics of rotational motion in the longitudinal plane." E3S Web of Conferences 383 (2023): 05008. http://dx.doi.org/10.1051/e3sconf/202338305008.

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In this paper, the influence of the volumetric-mass layout of the aircraft on the dynamics of rotational motion in the longitudinal plane is considered. The studies allow us to evaluate the relationship between the space-mass layout of the aircraft and the perturbing aerodynamic effects that occur during the transition process. The deviation of the empirical values of the aerodynamic moment from the linear dependence and the time of the transition process were considered to be quantitative estimates of the quality of the transient process. An original aerodynamic experiment with a moving aircr

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Podrigalo, L., and Shi Ke. "Study of biomechanical parameters of kickboxers with different training experience." Єдиноборства, no. 2(32) (February 9, 2024): 71–80. http://dx.doi.org/10.15391/ed.2024-2.07.

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Purpose: to carry out a comparative analysis of biomechanical indicators of kickboxers with different training experience. Material and methods. The study was conducted with the participation of 23 kickboxing athletes, divided into 2 groups. Group 1 – 11 athletes, average age (14,00±0,56) years, training experience (0,65±0,18) years. Group 2 – 12 athletes, average age (13,75±1,04) years, training experience (5,00±0,58) years. Anthropometric studies included determination of body length and weight. The calculation of the main biomechanical parameters was carried out according to special regress

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Boughari, Yamina, Ruxandra Mihaela Botez, Georges Ghazi, and Florian Theel. "Flight control clearance of the Cessna Citation X using evolutionary algorithms." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 231, no. 3 (2016): 510–32. http://dx.doi.org/10.1177/0954410016640821.

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In this paper, an Aircraft Research Flight Simulator equipped with Flight Dynamics Level D (highest level) was used to collect flight test data and develop new controller methodologies. The changes in the aircraft’s mass and center of gravity position are affected by the fuel burn, leading to uncertainties in the aircraft dynamics. A robust controller was designed and optimized using the H∞ method and two different metaheuristic algorithms; in order to ensure acceptable flying qualities within the specified flight envelope despite the presence of uncertainties. The H∞ weighting functions were

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Su, Qianye, Chunlei Liu, Yu Zhang, et al. "Consistency of Changes in the Ascending and Descending Positions of the Hadley Circulation Using Different Methods." Atmosphere 16, no. 4 (2025): 367. https://doi.org/10.3390/atmos16040367.

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The shift in the intertropical convergence zone (ITCZ) and the poleward expansion of the Hadley circulation termini have attracted many investigations, since they affect the hydrological cycle and hence the societies and ecosystems in the tropical and subtropical areas. Using the observed precipitation and three atmospheric reanalysis data sets, different methods have been employed to quantify the changes in the ITCZ position, the Hadley circulation width, terminus position, and center intensity in both hemispheres over the global and seven longitudinal sections. It is found that the ITCZ posi

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Verdú, Enrique, Rafael O. Labrador, Francisco J. Rodríguez, Dolores Ceballos, Joaquim Forés, and Xavier Navarro. "Alignment of collagen and laminin-containing gels improve nerve regeneration within silicone tubes." Restorative Neurology and Neuroscience 20, no. 5 (2002): 169–80. https://doi.org/10.3233/rnn-2002-00217.

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Purpose: Placement of extracellular matrix components has been used as a mean to enhance axonal growth across nerve long gaps repaired by tubulization. However, such matrices may impede axonal regeneration depending on its density and microgeometry. Methods: Silicone tubes were prefilled with collagen or laminin-containing gels and implanted into a 6 mm gap, a length considered limiting for regeneration, in the mouse sciatic nerve. Gels were polymerized prior to implantation either in horizontal position or subjected to gravitational (in vertical position) or to magnetic forces to induce longi

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Biswas, Konish, Sanjay Agrawal, Priyanka Gupta, and Rajnish Arora. "Evaluation of risk factors for postoperative neurologic intensive care admission after brain tumor craniotomy: A single-center longitudinal study." Journal of Anaesthesiology Clinical Pharmacology 40, no. 2 (2024): 217–27. http://dx.doi.org/10.4103/joacp.joacp_323_22.

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Abstract Background and Aims: Perioperative variable parameters can be significant risk factors for postoperative intensive care unit (ICU) admission after elective craniotomy for intracranial neoplasm, as assessed by various scoring systems such as Cranio Score. This observational study evaluates the relationship between these factors and early postoperative neurological complications necessitating ICU admission. Material and Methods: In total, 119 patients, aged 18 years and above, of either sex, American Society of Anesthesiologists (ASA) grades I–III, scheduled for elective craniotomy and

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Nakajima, Kazuhisa, Jonathan Wheeler, Gérard Mourou, and Toshiki Tajima. "Novel laser-plasma TeV electron-positron linear colliders." International Journal of Modern Physics A 34, no. 34 (2019): 1943003. http://dx.doi.org/10.1142/s0217751x19430036.

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TeV center-of-mass energy electron-positron linear colliders comprising seamlessly staged capillary laser-plasma accelerators are presented. A moderate intensity laser pulse coupled with the single electromagnetic hybrid mode in a gas-filled capillary can generate plasma waves in the linear regime, where laser wakefields can accelerate equally focused electron and positron beams. In multiple stage capillary accelerators, a particle beam with respect to the laser wakefield can undergo consecutive acceleration up to TeV energies, associated with continuous transverse focusing in a beam size down

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Li, Xiaogao, Ning Zhang, Xianjian Jin, and Nan Chen. "Modeling and Analysis of Vehicle Shimmy with Consideration of the Coupling Effects of Vehicle Body." Shock and Vibration 2019 (March 24, 2019): 1–14. http://dx.doi.org/10.1155/2019/3707416.

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Based on the Lagrange equation, a 9-degrees-of-freedom shimmy model with consideration of the coupling effects between the motions of vehicle body and the shimmy of front wheels and a 5-degrees-of-freedom shimmy model ignoring these coupling effects for a vehicle with double-wishbone independent front suspensions are presented here to study the problem of vehicle shimmy. According to the eigenvalue loci of system’s Jacobian matrix plotted on the complex plane, the Hopf bifurcation characteristics of nonlinear shimmy are studied and the conditions for the generation of limit cycle are analyzed.

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Decker, Oliver. "Secondary authoritarianism ‐ the economy and right-wing extremist attitudes in contemporary Germany." Journal of Psychosocial Studies 12, no. 1 (2019): 203–13. http://dx.doi.org/10.1332/147867319x15608718111032.

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In this essay the thesis of a secondary authoritarian dynamic governing contemporary German society is presented. The author follows Sigmund Freud’s distinction between primary and secondary masses ‐ a leader as idealized object of the group members constitutes the first, an abstract object produces the latter mass. To underpin his thesis the author argues with empirical findings of the longitudinal research project ‘Leipzig-Studies on Authoritarianism’ measuring right-wing extremist attitudes in the general German population since 2002 (until 2018 known as ‘Leipzig “Center”-Studies’). Those e

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Rindani, Saurabh D., and Balbeer Singh. "Indirect measurement of triple-Higgs coupling at an electron–positron collider with polarized beams." International Journal of Modern Physics A 35, no. 04 (2020): 2050011. http://dx.doi.org/10.1142/s0217751x20500116.

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We examine the possibility of using single-Higgs production at an [Formula: see text] collider with polarized beams to measure, or constrain, indirectly a possible anomalous triple-Higgs coupling, which can contribute to the process via one-loop diagrams. In the dominant process [Formula: see text], longitudinally polarized beams can lead to an improvement in the cross-section by 50% for [Formula: see text] and [Formula: see text] polarizations of [Formula: see text] and [Formula: see text], respectively. This corresponds to an improvement in the sensitivity to the triple-Higgs coupling of abo

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Pang, Ce, Zeqing He, Kaiyin Song, and Shenghong Cao. "Analysis of Wind Field Response Characteristics of Tethered Balloon Systems." Aerospace 11, no. 5 (2024): 360. http://dx.doi.org/10.3390/aerospace11050360.

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Tethered balloon systems encounter various complex wind field environments during flight. To investigate the conditions under which the system can operate safely and smoothly, a longitudinal dynamic model for tethered balloon systems is established. The model incorporates a streamlined balloon shape with its aerodynamic center at the body’s center. Steady-state aerodynamic force coefficients are calculated through simulations and fitted to a function based on the angle of attack within a specified range. The complex cable model is simplified using the lumped mass method, considering the influe

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Hsu, Wei-Li, John P. Scholz, Gregor Schöner, John J. Jeka, and Tim Kiemel. "Control and Estimation of Posture During Quiet Stance Depends on Multijoint Coordination." Journal of Neurophysiology 97, no. 4 (2007): 3024–35. http://dx.doi.org/10.1152/jn.01142.2006.

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This study tested the hypotheses that all major joints along the longitudinal axis of the body are equally active during quiet standing and that their motions are coordinated to stabilize the spatial positions of the center of mass (CM) and head. Analyses of the effect of joint configuration variance on the stability of the CM and head positions were performed using the uncontrolled manifold (UCM) approach. Subjects stood quietly with arms folded across their chests for three 5-min trials each with and without vision. The UCM analysis revealed that the six joints examined were coordinated such

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Sokil, B. I., A. P. Senyk, M. B. Sokil, and A. Ye Lisnichuk. "Method of normal oscillations and substantiation of the choice of parameters for certain nonlinear systems with two degrees of freedom." Mathematical Modeling and Computing 10, no. 3 (2023): 927–34. http://dx.doi.org/10.23939/mmc2023.03.927.

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On the example of the plane model of wheeled vehicle oscillations with adaptive power characteristic of the suspension system, the methodology for selecting its main parameters that would maximize the movement smoothness is developed. To solve this problem, the mathematical model of relative oscillations of the sprung part is constructed, provided that they are carried out in the vertical plane. The latter represents the system of two nonlinear differential equations describing the relative displacement of the center of mass of the sprung part and the angle of rotation of the latter around the

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Nowicki, Waldemar. "The Longitudinal Superdiffusive Motion of Block Copolymer in a Tight Nanopore." Polymers 12, no. 12 (2020): 2931. http://dx.doi.org/10.3390/polym12122931.

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The structure and dynamic properties of polymer chains in a confined environment were studied by means of the Monte Carlo method. The studied chains were represented by coarse-grained models and embedded into a simple 3D cubic lattice. The chains stood for two-block linear copolymers of different energy of bead–bead interactions. Their behavior was studied in a nanotube formed by four impenetrable surfaces. The long-time unidirectional motion of the chain in the tight nanopore was found to be correlated with the orientation of both parts of the copolymer along the length of the nanopore. A pos

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Коваль, Андрій. "ЗАБЕЗПЕЧЕННЯ КЕРОВАНОСТІ ГУСЕНИЧНИХ ЗЕМЛЕРИЙНИХ МАШИН БЕЗПЕРЕРВНОЇ ДІЇ ЗА УМОВИ МОНТАЖУ ЇХ РОБОЧОГО ОБЛАДНАННЯ ЗБОКУ ВІД БАЗОВОГО ШАСІ". Automobile Roads and Road Construction, № 112 (30 листопада 2022): 287–94. http://dx.doi.org/10.33744/0365-8171-2022-112-287-294.

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This paper presents the problem of determination of stable transposition controllability conditions for the continuously operating earthmoving machine under conditions of working equipment mounting to the side from the base chassis (towing unit). The economical crisis in the country requires promising directions in the new technology creation, one of which is the creation of multipurpose towing units designated for mounting working equipment for different technological purposes. Such equipment can be mounted at the front, back, or side of the towing unit (chassis) and the machine created in su

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Homma, Takahiro, and Hiroshi Yamaura. "Evaluating Inertial Parameter Uncertainty in High-Acceleration Movements and Improving Predictions Through Identification Using Free Vibration Measurements." Biomechanics 5, no. 1 (2025): 18. https://doi.org/10.3390/biomechanics5010018.

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Background/Objectives: This study aimed to examine how uncertainties in inertial properties and minimal sets of inertial parameters (MSIP) affect inverse-dynamics simulations of high-acceleration sport movements and to demonstrate that applying MSIP identified through the free vibration measurement method improves simulation accuracy. Methods: Monte Carlo simulations were performed for running, side-cutting, vertical jumping, arm swings, and leg swings by introducing uncertainties in inertial properties and MSIP. Results: These uncertainties significantly affect the joint torques and ground re

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Тretyak, V. M., V. V. Sheban, R. V. Oliadnichuk, O. F. Govorov, and R. V. Melnik. "Influence of hinged device parameters on negative resonance oscillations during the operation of machine-tractor unit in transport mode." Mehanization and electrification of agricultural, no. 12 (2020): 129–36. http://dx.doi.org/10.37204/0131-2189-2020-12-15.

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Annotation Purpose. Reducing the influence of resonance phenomena on the structural elements of a tractor of the KIY 14102 type when driving with an attached implement in transport mode. Methods. To solve this problem means of graph-analytical constructions, analytical geometry, oscillation theory and theoretical mechanics were used. Results. On the basis of the graphic-analytical analysis of the kinematic diagram of the tractor attachment of the KIY 14102 type, it was found that the position of the instantaneous center of its rotation significantly depends on the change in the angle between t

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Macpherson, J. M. "Changes in a postural strategy with inter-paw distance." Journal of Neurophysiology 71, no. 3 (1994): 931–40. http://dx.doi.org/10.1152/jn.1994.71.3.931.

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1. The purpose of this study was to examine the effect of changing initial stance conditions on the postural response of the cat to horizontal plane translations of the support surface. Cats were trained to stand, unrestrained, on a moveable force platform. The platform was translated linearly in each of 16 directions in the horizontal plane, with a ramp-and-hold displacement. The animal's response was quantified in terms of the forces exerted at the ground. The trajectory of the center of mass (CoM) was computed from the forces. 2. Stance length was varied along the longitudinal (sagittal) ax

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Abbassi, Younes, Youcef Ait-Amirat, and Rachid Outbib. "Global modeling and simulation of vehicle to analyze the inertial parameters effects." International Journal of Modeling, Simulation, and Scientific Computing 07, no. 03 (2016): 1650032. http://dx.doi.org/10.1142/s179396231650032x.

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This paper mainly studies the comparison of the global vehicle models and the effects of the inertial parameters due to the center of gravity (CG) positions when we consider that the vehicle has only one CG. This paper proposes a new nonlinear model vehicle model which considers both unsprung mass and sprung mass CG. The CG positions and inertial parameters effects are analyzed in terms of the published vehicle dynamics models. To this end, two 14 degree-of-freedom (DOF) vehicle models are developed and compared to investigate the vehicle dynamics responses due to the different CG height and i

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Didmanidze, Otari, Roman Fedotkin, Vitaliy Kryuchkov, Nikita Degtiarev, Daniil Dudin, and Aleksei Alipichev. "Operational tests of a small-sized farm multi-purpose vehicle." E3S Web of Conferences 583 (2024): 08023. http://dx.doi.org/10.1051/e3sconf/202458308023.

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The paper deals with the issue of expanding the scope of application of small-sized farm multi-purpose vehicles in the production process. The authors focus on the risks associated with the use of this type of machines. The authors prove that application of small-sized farm multi- purpose vehicles is feasible in agricultural production. To increase the interest of agricultural producers in small-sized farm vehicles it is necessary to develop a system of reliable assessment and verification of their actual consumer properties. For this purpose, the authors have studied the existing normative an

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Tonguç, Güray, İsmail Hakkı Akçay, and Habib Gürbüz. "Improvement of the visual warning system for various driving and road conditions in road transportation." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, no. 2 (2017): 175–87. http://dx.doi.org/10.1177/0954407017690962.

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This study aims to identify the potential adverse driving conditions which result from driver behavior, road surfaces and weather conditions for vehicles during a cruise, and to inform the drivers of the other vehicles moving on the same route. Adverse driving condition scenarios were developed via acceleration data in lateral, longitudinal and vertical directions gathered by using an accelerometer sensor placed at the gravity center of the test vehicles. The drivers were warned through the symbols designed according to the developed scenarios in different shapes and colors, displayed on an in

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Frost, Shawn B., Maria Iliakova, Caleb Dunham, Scott Barbay, Paul Arnold, and Randolph J. Nudo. "Reliability in the location of hindlimb motor representations in Fischer-344 rats." Journal of Neurosurgery: Spine 19, no. 2 (2013): 248–55. http://dx.doi.org/10.3171/2013.4.spine12961.

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Object The purpose of the present study was to determine the feasibility of using a common laboratory rat strain for reliably locating cortical motor representations of the hindlimb. Methods Intracortical microstimulation techniques were used to derive detailed maps of the hindlimb motor representations in 6 adult Fischer-344 rats. Results The organization of the hindlimb movement representation, while variable across individual rats in topographic detail, displayed several commonalities. The hindlimb representation was positioned posterior to the forelimb motor representation and posterolater

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GOOLISH, EDWARD M. "Swimbladder Function and Buoyancy Regulation in the Killifish Fundulus Heterochtus." Journal of Experimental Biology 166, no. 1 (1992): 61–81. http://dx.doi.org/10.1242/jeb.166.1.61.

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Killifish, Fundulus heteroclitus, subjected to artificial lift above their center of gravity (10% of body weight) required a minimum of 7–8 days to resorb swimbladder gases completely. The swimbladders of some fish, however, did not fall below 50% of normal volume. The rate of increase in swimbladder volume upon removal of lift varied little among individuals, with approximately 6 days required for complete refilling. Previous deflation of the swimbladder (by syringe) did not result in faster or more complete gas resorption when the fish were subjected to artificial lift. This suggests that th

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Шаталова, Н. В., О. В. Бородина, and М. Ю. Михайлова. "Model of intelligent motion control of an unmanned aircraft system when landing on moving marine objects." MORSKIE INTELLEKTUAL`NYE TEHNOLOGII)</msg> 1, no. 3(65) (2024): 239–47. http://dx.doi.org/10.37220/mit.2024.65.3.046.

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Смещение центра масс снаряженного летательного аппарата, движущегося в непрерывно изменяющемся профиле движущихся воздушных масс процесс нестабильный и требует постоянной компенсации. Пилоту для визуального контакта с движущимся морским объектом необходимо управлять не только продольной устойчивость гидросамолёта, но и его пространственному положению по отношению к плоскости движущегося морского объекта. Компенсировать аэродинамический профиль полёта призваны системы обратной связи бортового оборудования летательного аппарата. В статье проведен анализ мирового опыта интеграции беспилотных лета

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Bondyrev, V. E., S. I. Knyazev, V. I. Korolev, and S. F. Jatsun. "Small-size Unmanned Control Algorithm of an Underwater Complex." Proceedings of the Southwest State University 24, no. 4 (2021): 166–79. http://dx.doi.org/10.21869/2223-1560-2020-24-4-166-179.

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Purpose of research: The creation of water bodies monitoring systems makes it possible to evaluate environmental situation in various points of monitoring area quickly. One of the main stages of water quality research is sampling, which is currently carried out at stationary posts, which makes it impossible to ensure operational control in various areas of an observation site. The problem can be solved by using mobile robotic platforms. The purpose of this study is to create mathematical model and algorithm for controlling autonomous movement of an underwater robotic device for collecting wate

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Kąkol, Marcin, Zbigniew Lozia, and Radosław Piłatowicz. "Car-trailer coupling devices - description of requirements and overview of flexible and static load measuring solutions." WUT Journal of Transportation Engineering 138 (June 1, 2024): 19–34. http://dx.doi.org/10.5604/01.3001.0054.5450.

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The article presents an overview of the current normative, national, and international documents, containing in their content the requirements for devices coupling a car with a trailer in terms of technical conditions that these devices must meet to confirm proper performance and ensure the possibility of safe use during exploitation before will go on sale. Attention was paid to the division of coupling devices of motor vehicles and trailers into classes according to Regulation 55 of the UN/ECE and the resulting requirements. The principles according to which it should be accepted that couplin

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Koryak, Yu A., T. B. Kukoba, and D. R. Babich. "Dynamics of Changes in Muscle Architecture, Force, Strength-Velocity Properties of the Muscles of Lower Limbs in Humans under the Influence of a Three Week Unloading." Физиология человека 49, no. 2 (2023): 27–43. http://dx.doi.org/10.31857/s0131164622600604.

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The present study examined the hypothesis that significant alterations in antigravity muscle architecture would occur with dry water immersion (DI) and that some structural changes may be seen in postural muscles because of the overall decrease in physical activity. Ten men (age (mean ± SE) – 24.5 ± 3.9 years, height – 176.1 ± 1.2 m, mass – 71.1 ± 3.4 kg) volunteered for the study. The healthy men underwent of DI for 21 days. All subjects did not use physical training during the exposure. The contractile properties of the muscle ankle extensors and flexors (maximal voluntary contraction (MVC)

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Nekuchaev, V. O., A. V. Tarsin, and P. V. Fedorov. "THE INFLUENCE OF INHOMOGENEOUS RADIAL PROFILE OF WAXY CRUDE OIL TEMPERATURE AND SHEAR STRESS IN A STOPPED PIPELINE ON THE RESTART PUMPING PRESSURE FOR «USA — UKHTA» MAIN PIPELINE." Petroleum Engineering 21, no. 2 (2023): 127–38. http://dx.doi.org/10.17122/ngdelo-2023-2-127-138.

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The purpose of this work is to calculate the shear pressure gradient and shear radius of paraffinic oil in a stopped pipeline as functions of the longitudinal coordinate z along the axis of the stopped section, as well as the minimum shear pressure difference between the ends of the pipeline, taking into account the non-uniform cooling of oil over time in the radial direction, leading to a significant increase in static shear stress with distance from the center to the edge of the pipe. Using a simple mathematical model that describes the non-uniform cooling of oil along the radius r and along

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Keller, Sarah, Tabea Borde, Julia Brangsch, et al. "Native T1 Mapping Magnetic Resonance Imaging as a Quantitative Biomarker for Characterization of the Extracellular Matrix in a Rabbit Hepatic Cancer Model." Biomedicines 8, no. 10 (2020): 412. http://dx.doi.org/10.3390/biomedicines8100412.

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To characterize the tumor extracellular matrix (ECM) using native T1 mapping magnetic resonance imaging (MRI) in an experimental hepatic cancer model, a total of 27 female New Zealand white rabbits with hepatic VX2 tumors were examined by MRI at different time points following tumor implantation (day 14, 21, 28). A steady-state precession readout single-shot MOLLI sequence was acquired in a 3 T MRI scanner in prone position using a head-neck coil. The tumors were segmented into a central, marginal, and peritumoral region in anatomical images and color-coded T1 maps. In histopathological sectio

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Klar, Antonio Evaldo, Cleber Junior Jadoski, Marcio Furlan Maggi, Juliana Ramiro, and Alexandre Barreto Almeida dos Santos. "DISTRIBUIÇÃO DA ENERGIA NO INTERIOR DE UMA ESTUFA PLÁSTICA NO PERÍODO DO INVERNO." IRRIGA 11, no. 2 (2006): 257–65. http://dx.doi.org/10.15809/irriga.2006v11n2p257-265.

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DISTRIBUIÇÃO DA ENERGIA NO INTERIOR DE UMA ESTUFA PLÁSTICA NO PERÍODO DO INVERNO Antonio Evaldo Klar; Cleber Junior Jadoski; Marcio Furlan Maggi; Juliana Ramiro; Alexandre Barreto Almeida dos SantosFaculdade de Ciências Agronômicas de Botucatu, Universidade Estadual Paulista Botucatu, SP, klar@fca.unesp.br 1. RESUMO Este trabalho teve por objetivo estudar a distribuição da energia no interior de um ambiente protegido durante o período do inverno do ano de 2005. O experimento foi instalado em uma estufa de polietileno na Fazenda Experimental Lageado da Faculdade de Ciências Agronômicas (FCA). P

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Srygley, R. B., and R. Dudley. "CORRELATIONS OF THE POSITION OF CENTER OF BODY MASS WITH BUTTERFLY ESCAPE TACTICS." Journal of Experimental Biology 174, no. 1 (1993): 155–66. http://dx.doi.org/10.1242/jeb.174.1.155.

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Using the evolution of neotropical butterflies as a natural experiment, we examine Ellington's biomechanical hypothesis that the position of center of body mass affects insect maneuverability. We find that the position of center of body mass is correlated with the butterflies' palatability, natural flight speeds and their ability to evade predators in a small cage. Relative to distasteful species, palatable butterflies fly faster and maneuver more successfully to evade attacks from aerial predators. The large thorax and short abdomen of palatable species position the center of body mass near t

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Maly, Connor, Nacime S. Mansur, Matthieu Lalevee, et al. "Middle Facet Subluxation Correlation with Foot and Ankle Offset in the Assessment of Progressive Collapsing Foot Deformity." Foot & Ankle Orthopaedics 7, no. 1 (2022): 2473011421S0033. http://dx.doi.org/10.1177/2473011421s00333.

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Category: Other; Hindfoot; Midfoot/Forefoot Introduction/Purpose: Identifying markers of severity and progression in Progressive Collapsing Foot Deformity (PCFD) provides surgeons with critical information, possibly aiding in the decision making along the treatment algorithm. Subtalar middle facet subluxation (MFS), the percent undercoverage of the talus in relation to its calcaneus counterpart, was recognized as a reliable marker in weight-bearing computerized tomography (WBCT) for PCFD diagnosis. The Foot and Ankle Offset (FAO), the relative position between the center of the ankle joint and

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Eremeykin, Sergey, Grigory Panovko, and Alexander Shokhin. "Analysis of oscillations of a mechanical system with inertial exciters at an alternating position of it’s mass center." MATEC Web of Conferences 224 (2018): 02064. http://dx.doi.org/10.1051/matecconf/201822402064.

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Numerical simulation results of dynamics of a mechanical system with self-synchronizing unbalance exciters with displaced center of mass relative to the initial centered state are described in application to analysis of dynamics of vibrating machines with variable position of operation load. Features of self-synchronization of exciters are revealed depending on position of the center of mass. Influence of position of the center of mass on resonance frequencies and modes is presented.

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AGUILAR, P., C. CHRYSSOMALAKOS, H. HERNANDEZ CORONADO, and E. OKON. "POSITION OPERATORS AND CENTER-OF-MASS: NEW PERSPECTIVES." International Journal of Modern Physics A 28, no. 29 (2013): 1350146. http://dx.doi.org/10.1142/s0217751x13501467.

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After reviewing the work of Pryce on Center-of-Mass (CoM) definitions in special relativity, and that of Jordan and Mukunda on position operators for relativistic particles with spin, we propose two new criteria for a CoM candidate: associativity, and compatibility with the Poisson bracket structure. We find that they are not satisfied by all of Pryce's definitions, and they also rule out Dixon's CoM generalization to the curved space–time case. We also emphasize that the various components of the CoM position do not commute among themselves, in the general case, and thus provide a natural ent

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Pai, Yi-Chung, and James Patton. "Center of mass velocity-position predictions for balance control." Journal of Biomechanics 30, no. 4 (1997): 347–54. http://dx.doi.org/10.1016/s0021-9290(96)00165-0.

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Sands, Timothy. "Autogenetic Gravity Center Placement." Sensors 25, no. 12 (2025): 3786. https://doi.org/10.3390/s25123786.

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Operations by space drones mandate significant autonomy. This study experimentally evaluates key proposed applications of autonomy. Center of gravity auto-location is proposed using autonomous identification of mass properties, necessitating nonlinear state estimation. Nonlinear, coupled governing kinetics are strictly adopted as the control, and inversion provides closed-form estimates of mass properties. Seminally neglecting the diagonal inertia moments, the inertia cross-products are utilized to exactly find the mass center coordinates using the parallel axis theorem to parameterize the loc

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Martić, Ivana, Nastia Degiuli, Carlo Giorgio Grlj, Kornelija Borčić, Josip Andrišić, and Igor Lalović. "Impact of the Longitudinal Center of Buoyancy on the Total Resistance of a Passenger Ship." Journal of Marine Science and Engineering 12, no. 10 (2024): 1749. http://dx.doi.org/10.3390/jmse12101749.

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A numerical investigation into the impact of the longitudinal position of the center of buoyancy on the total resistance of a passenger ship is conducted using the computational fluid dynamics software package STAR-CCM+. The modification of the hull form is performed using the CAESES software package, respecting the limitations on the longitudinal position of the center of buoyancy set by Flow Ship Design d.o.o. The total numerical uncertainty for the total resistance, sinkage, and trim angle of the original hull form is assessed within the verification study. The flow around the ship hull is

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Wang, Yan. "Longitudinal Stress Analysis of Local Compression on the Center of Plain Concrete Column." Applied Mechanics and Materials 578-579 (July 2014): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amm.578-579.71.

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Taking local compression on the center of plain concrete square column as an example, by using finite element analysis found that longitudinal stressdistribution and size of local compression on the center of plain concrete square column related to local compression acting position and local compression area ratio.

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Moosmann, Julian, and Ralf Hofmann. "Evolving Center-Vortex Loops." ISRN Mathematical Physics 2012 (May 28, 2012): 1–15. http://dx.doi.org/10.5402/2012/236783.

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We consider coarse-graining applied to nonselfintersecting planar centervortex loops as they emerge in the confining phase of an SU(2) Yang-Mills theory. Well-established properties of planar curve-shrinking predict that a suitably defined, geometric effective action exhibits (mean-field) critical behavior when the conformal limit of circular points is reached. This suggests the existence of an asymptotic mass gap. We demonstrate that the initially sharp mean center-of-mass position in a given ensemble of curves develops a variance under the flow as is the case for a position eigenstate in fre

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