A suboptimal algorithm for synthesis of a movable object control

Two setups for X-ray visualization of objects interior structure were designed and assembled in TPU. These radiographic systems are based on linear gas-discharge and GaAs semiconductor detectors. During investigation of biological object control of radiation doses has a high priority. In this report radiation dose calculations in X-ray visualization are presented. These calculation also includes dose calculations of sinograms which are used for reconstruction of tomography slices.

Download Full-text

Simulation and design of Charged object control system

2011 International Conference on Computer Science and Service System (CSSS) ◽

10.1109/csss.2011.5974586 ◽

2011 ◽

Author(s):

Jianbo Wang ◽

Mingxin Yang ◽

Nan Wang ◽

Chao Cheng

Keyword(s):

Control System ◽

Object Control

Download Full-text

La competencia motriz en estudiantes chilenos de 3° y 4° de educación básica. Aprendizajes esperados versus realidad (Motor competence in Chilean students in 3rd and 4th grade of primary school. Expected learning versus reality)

Retos ◽

10.47197/retos.v44i0.91095 ◽

2021 ◽

Vol 44 ◽

pp. 515-524

Author(s):

Daniel Rodríguez-Briceño ◽

Felipe Castro-Vilugron ◽

Mauricio Díaz-Alvarado ◽

Jaime Carcamo Oyarzun

Keyword(s):

Motor Performance ◽

Fourth Grade ◽

Learning Objectives ◽

Motor Competence ◽

Object Control ◽

Third Grade Students ◽

Fourth Grade Students ◽

Low Levels ◽

And Gender ◽

Better Than

Este estudio busca determinar los niveles de competencia motriz de estudiantes chilenos y las posibles diferencias en función del grado y del sexo. Participaron 377 estudiantes (37.7% niñas) de tercer y cuarto básico. La competencia motriz fue evaluada a través del test MOBAK 3-4. Se encontraron bajos niveles de competencia motriz. Los estudiantes de cuarto grado presentan un mejor desempeño motriz que los de tercero. Los niños presentan un mayor desempeño que las niñas en control de objetos, mientras que las niñas obtienen puntajes más altos que los niños en control del cuerpo, aunque con un tamaño del efecto irrelevante. Al contrastar estos resultados con los objetivos del currículum, muchos estudiantes no alcanzan los aprendizajes esperados, siendo necesario poner mayor énfasis en el fomento de la competencia motriz. Abstract. This study aims to determine the levels of motor competence of Chilean students and possible differences according to grade and gender. 377 students (37.7% girls) of the third and fourth grade participated in the study. Motor competence was evaluated through the MOBAK 3-4 test. Low levels of motor competence were found. Fourth grade students showed a better motor performance than third grade students. Boys performed better than girls in object control, while girls scored higher than boys in self-movement, although with an irrelevant effect size. When these results are contrasted with the learning objectives stipulated in the curriculum, many students do not achieve the expected skills, what makes it necessary to place greater emphasis on the promotion of motor competence.

Download Full-text

Equilibrium, Stability, and Robustness in Underactuated Grasping

Volume 8: 31st Mechanisms and Robotics Conference, Parts A and B ◽

10.1115/detc2007-34963 ◽

2007 ◽

Cited By ~ 5

Author(s):

Gert A. Kragten ◽

Just L. Herder

Keyword(s):

Degrees Of Freedom ◽

Equilibrium Configuration ◽

Performance Measure ◽

Equilibrium Stability ◽

Equilibrium Conditions ◽

Design Decisions ◽

Grasp Stability ◽

Movable Object ◽

Passive Compliance ◽

Freely Moving

This paper aims to develop a performance measure for underactuated grasping devices, which is useful in making design decisions to obtain an optimally performing device. Underactuated fingers, defined as having more degrees of freedom than degrees of actuation, intrinsically adapt their shape to the object. However, the equilibrium configuration and grasp forces of these fingers are not fully controllable, which may limit their performance. The grasp performance measure defined in this paper consists of three aspects: (1) the ability to grasp objects, which is limited by the equilibrium conditions and constraints of both the underactuated fingers and the freely movable object; (2) the grasp stability, which takes the passive compliance of the fingers into account; (3) the ability to oppose disturbance forces on the grasped object by passively adapting the frictional grasp forces. This measure was applied to optimize a planar grasping device with two underactuated fingers, each consisting of two phalanges, able to grasp freely moving circular objects.

Download Full-text