Erb's Arm: A mechanical device to assist people affected by Erb's Palsy in writing

2013 ◽  
Author(s):  
Ramani Venkatesh ◽  
Sreejita Ghosh ◽  
Prabhav Reddy
Keyword(s):  
Mechanical Device ◽  
Erb’S Palsy

DESIGN OF A MECHANICAL DEVICE FOR REDUCING NOISE AND ISSUANCE OF GAS AND PARTICLES FOR DIESEL ENGINES FROM AN ENERGY GENERATING ENGINE

2018 ◽  
Author(s):  
Herivaldo Pascoal ◽  
Domingos Sávio Tavares Mendes Junior ◽  
ANTONILSON CONCEIÇÃO ◽  
Yves Bandeira ◽  
Carlisson Azevedo ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Mechanical Device

Sliding Mode Control of an Actuated Knee Joint Orthosis

2021 ◽  
Vol 15 ◽  
Author(s):  
Imen Saidi ◽  
Asma Hammami
Keyword(s):  
Sliding Mode Control ◽  
Lower Limb ◽  
Sliding Mode ◽  
Position Tracking ◽  
Sliding Mode Controller ◽  
Mechanical Device ◽  
Tracking Errors ◽  
Mode Control ◽  
Speed Tracking ◽  
Human Morphology

Introduction: In this paper, a robust sliding mode controller is developed to control an orthosis used for rehabilitation of lower limb. Materials and Methods: The orthosis is defined as a mechanical device intended to physically assist a human subject for the realization of his movements. It should be adapted to the human morphology, interacting in harmony with its movements, and providing the necessary efforts along the limbs to which it is attached. Results: The application of the sliding mode control to the Shank-orthosis system shows satisfactory dynamic response and tracking performances. Conclusion: In fact, position tracking and speed tracking errors are very small. The sliding mode controller effectively absorbs disturbance and parametric variations, hence the efficiency and robustness of our applied control.

scholarly journals Accuracy of cup placement in total hip arthroplasty by means of a mechanical positioning device: a comprehensive cadaveric 3d analysis of 16 specimens

2019 ◽  
pp. 112070001987482
Author(s):  
Arthur J Kievit ◽  
Johannes G G Dobbe ◽  
Wouter H Mallee ◽  
Leendert Blankevoort ◽  
Geert J Streekstra ◽  
...  
Keyword(s):  
3D Models ◽  
Safe Zone ◽  
3D Analysis ◽  
Anterior Pelvic Plane ◽  
Mechanical Device ◽  
Acetabular Cup ◽  
Anteversion Angle ◽  
Positioning Device ◽  
The Mean ◽  
Safe Zones

Introduction: We tested whether a mechanical device (such as Hipsecure) to pinpoint the anterior pelvic plane (APP) as a guide can improve acetabular cup placement. To assess accuracy we asked: (1) is the APP an effective guide to position acetabular cup placement within acceptable ° of divergence from the optimal 40° inclination and 15° anteversion; (2) could a mechanical device increase the number of acetabular cup placements within Lewinnek’s safe zone (i.e. inclination 30° to 50°; anteversion 5° to 25°)? Methods: 16 cadaveric specimens were used to assess the 3D surgical success of using a mechanical device APP to guide acetabular cup placement along the APP. We used the Hipsecure mechanical device to implant acetabular cups at 40° inclination and 15° anteversion. Subequently, all cadaveric specimens with implants were scanned with a CT and 3D models were created of the pelvis and acetabular cups to assess the outcome in terms of Lewinnek’s safe zones. Results: The mean inclination of the 16 implants was 40.6° (95% CI, 37.7–43.4) and the mean anteversion angle was 13.4° (95% CI, 10.7–16.1). All 16 cup placements were within Lewinnek’s safe zone for inclination (between 30° and 50°) and all but 2 were within Lewinnek’s safe zone for anteversion (between 5° and 25°). Conclusion: In cadaveric specimens, the use of a mechanical device and the APP as a guide for acetabular cup placement resulted in good positioning with respect to both of Lewinnek’s safe zones.

scholarly journals Correlation between age, muscle architecture, and muscle strength in children with Erb’s palsy

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Ahmed Saad Awad ◽  
Mostafa Soliman Ali ◽  
Mohamed Ismail Elassal
Keyword(s):  
Muscle Strength ◽  
Muscle Weakness ◽  
Muscle Thickness ◽  
Study Groups ◽  
Pennation Angle ◽  
Muscle Architecture ◽  
Active Movement ◽  
Significant Relation ◽  
Erb’S Palsy ◽  
Significant Difference

Abstract Background Muscle weakness is a widespread problem in children with Erb’s palsy as it can cause changes in muscle architecture parameters, which can be detected by ultrasonography. This study was conducted to determine the relation between age, muscle architecture, and muscle strength in children with Erb’s palsy. A total of 40 children with Erb’s palsy from both sexes aged 1–2.5 years were included in this study. Muscle thickness and pennation angle were measured by ultrasonography, and muscle strength was measured using the active movement scale. Results A significant relation was found between age, muscle thickness, pennation angle, and muscle strength (P < 0.05). Moreover, a significant difference was found in muscle architecture parameters during relaxation and contraction in both study groups and in each study group (P < 0.05). Conclusion Muscle weakness in children with Erb’s palsy has an effect on muscle architecture parameters, and these parameters also increase with age.

An electro-opto-mechanical device to make diffractive optical elements

2011 ◽  
Author(s):  
Jorge Castro-Ramos ◽  
Gabriel Gordiano-Alvarado ◽  
Carlos M. Ortiz-Lima ◽  
M. Antonio De-Jesus-Ortiz ◽  
Sergio Vazquez-Montiel ◽  
...  
Keyword(s):  
Diffractive Optical Elements ◽  
Mechanical Device ◽  
Optical Elements

A Simple Extensometer for Tensile Testing of Polymers

1958 ◽  
Vol 31 (3) ◽  
pp. 673-679
Author(s):  
A. E. Eagles ◽  
A. R. Payne
Keyword(s):  
Conventional Method ◽  
Tensile Testing ◽  
Considerable Increase ◽  
Mechanical Device

Abstract The prototype extensometer, which has now been in constant use for over a year, gives satisfactory results which compare favorably with those of the conventional method. The use of this extensometer, which is a simple mechanical device, robust and reliable in operation, removes the last obstacle from autographic recording of tests using dumbbell specimens, thus permitting a considerable increase in speed of tensile testing.

A Mechanical Device for Controlled Ocular Decompression

Ophthalmology ◽  
1979 ◽  
Vol 86 (5) ◽  
pp. 847-848
Author(s):  
Karl J. Fritz ◽  
Walter M. Jay ◽  
David J. Schanzlin ◽  
Ramesh C. Tripathi
Keyword(s):  
Mechanical Device

Research on a mechanical device to prevent people from being squeezed in elevator pit

2021 ◽  
Author(s):  
Shuangchang Feng ◽  
Yanchun Liang ◽  
Jie Chen ◽  
Bo Wang
Keyword(s):  
Mechanical Device
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