Simulation and Analysis of Microspines Interlocking Behavior on Rocky Surfaces: An In-Depth Study of the Isolated Spine

2020 ◽  
Vol 12 (6) ◽  
Author(s):  
Saverio Iacoponi ◽  
Marcello Calisti ◽  
Cecilia Laschi
Keyword(s):  
Analytic Functions ◽  
Extreme Environments ◽  
Performance Characteristics ◽  
Experimental Comparison ◽  
Rock Interaction ◽  
New Model ◽  
Field Robotics ◽  
Depth Study ◽  
Spine Model ◽  
Single Spine

Abstract Microspine grippers address a large variety of possible applications, especially in field robotics and manipulation in extreme environments. Predicting and modeling the gripper behavior remains a major challenge to this day. One of the most complex aspects of these predictions is how to model the spine to rock interaction of the spine tip with the local asperity. This paper proposes a single spine model, in order to fill the gap of knowledge in this specific field. A new model for the anchoring resistance of a single spine is proposed and discussed. The model is then applied to a simulation campaign. With the aid of simulations and analytic functions, we correlated performance characteristics of a spine with a set of quantitative, macroscopic variables related to the spine, the substrate and its usage. Eventually, this paper presents some experimental comparison tests and discusses traversal phenomena observed during the tests.

Experimental comparison of condensers and evaporators for use in both bottom-mount and side-by-side refrigerator/freezer units

2006 ◽  
Vol 220 (2) ◽  
pp. 215-222
Author(s):  
L M Chamra ◽  
P J Mago ◽  
G J Zdaniuk
Keyword(s):  
Sine Wave ◽  
Performance Characteristics ◽  
Experimental Comparison ◽  
Fin Spacing

The performance characteristics of several evaporators and condensers with different geometries for use in both bottom-mount and side-by-side refrigerator/freezer units are discussed and compared. This comparison was performed on the basis of the units' material, the type of fins, the fin spacing, and the overall length of the tubes. The condenser that showed the best performance for the bottom-mount and side-by-side refrigerator/freezer applications was made with copper-rifled tubes with sine-wave aluminium fins. Similarly, the evaporator that showed the best performance for the bottom-mount and side-by-side refrigerator/freezer units was made with copper-rifled tubes with plain aluminium fins.

The Study of Mechanism Analysis and Dynamical Simulation Based on Ultrasound Enhanced Supercritical and Subcritical CO2 Dissolution

2013 ◽  
Vol 690-693 ◽  
pp. 2951-2956
Author(s):  
Bin Zhang ◽  
Wei Wei Liu ◽  
Ming Zheng Li ◽  
Hong Chao Zhang
Keyword(s):  
Mass Transfer ◽  
New Technologies ◽  
Industrial Applications ◽  
Mechanism Analysis ◽  
New Model ◽  
Dynamical Simulation ◽  
Cavitation Bubbles ◽  
Simulation Based ◽  
Depth Study ◽  
Simulation Results

The supercritical and subcritical CO2 fluids are both new technologies having good industrial applications such as cleaning with the advantages of no residue, recyclability and so on. The technology of ultrasound coupled with them can enhance the dissolution and improve the mass transfer. However, there is a lack of in-depth study of its mechanism. The reasonable mechanism analysis of enhancement is stated in this paper. A new model is proposed that can simulate the dynamics of cavitation bubbles in the subcritical CO2 fluid based on the Rayleigh-Plesset equation. The effects of different parameter conditions on the dynamics of cavitation bubbles have been discussed and ideal parameter conditions which are beneficial to the dissolution are also listed from the dynamical simulation results.

The Hitachi Model HS-8 Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 238-239
Author(s):  
H. Akabori ◽  
K. Nishiwaki ◽  
K. Yoneta
Keyword(s):  
Electron Microscope ◽  
New Model ◽  
Predecessor Model

By improving the predecessor Model HS- 7 electron microscope for the purpose of easier operation, we have recently completed new Model HS-8 electron microscope featuring higher performance and ease of operation.

516: A Simplified Method to Estimate the Absolute Renal Uptake of 99MTC-DMSA: Evaluation with a New Model using the Radioactivity of Nephrectomy Specimens as Reference

2005 ◽  
Vol 173 (4S) ◽  
pp. 140-141
Author(s):  
Mariana Lima ◽  
Celso D. Ramos ◽  
Sérgio Q. Brunetto ◽  
Marcelo Lopes de Lima ◽  
Carla R.M. Sansana ◽  
...  
Keyword(s):  
New Model ◽  
Renal Uptake ◽  
Simplified Method ◽  
The Absolute

Analyzing Stochastic Dependence of Cognitive Processes in Multidimensional Source Recognition

2014 ◽  
Vol 61 (5) ◽  
pp. 402-415 ◽  
Author(s):  
Thorsten Meiser
Keyword(s):  
Cognitive Processes ◽  
Model Complexity ◽  
Multinomial Model ◽  
Stochastic Dependence ◽  
New Model ◽  
Multinomial Processing Tree ◽  
Cognitive States ◽  
The Family ◽  
Tree Models ◽  
Flexible Framework

Stochastic dependence among cognitive processes can be modeled in different ways, and the family of multinomial processing tree models provides a flexible framework for analyzing stochastic dependence among discrete cognitive states. This article presents a multinomial model of multidimensional source recognition that specifies stochastic dependence by a parameter for the joint retrieval of multiple source attributes together with parameters for stochastically independent retrieval. The new model is equivalent to a previous multinomial model of multidimensional source memory for a subset of the parameter space. An empirical application illustrates the advantages of the new multinomial model of joint source recognition. The new model allows for a direct comparison of joint source retrieval across conditions, it avoids statistical problems due to inflated confidence intervals and does not imply a conceptual imbalance between source dimensions. Model selection criteria that take model complexity into account corroborate the new model of joint source recognition.

From Harm to Help: A New Model of Feminist Therapy

1986 ◽  
Vol 31 (2) ◽  
pp. 108-109
Author(s):  
Alexandra G. Kaplan
Keyword(s):  
Feminist Therapy ◽  
New Model
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