Pulsed Force Mode SFM

2006 ◽  
pp. 208-249
Author(s):  
Alexander Gigler ◽  
Othmar Marti
Keyword(s):  
Force Mode

Mechanical properties of UV-photopolymerizable hybrid sol–gel films investigated by AFM in Pulsed Force Mode

2005 ◽  
Vol 33 (2-4) ◽  
pp. 233-242 ◽  
Author(s):  
O. Soppera ◽  
M. Feuillade ◽  
C. Croutxé-Barghorn ◽  
C. Carré
Keyword(s):  
Mechanical Properties ◽  
Sol Gel ◽  
Force Mode ◽  
Sol Gel Films

TEST RESULTS OF 60-cm BORE Nb3Sn TEST MODULE COIL (TMC-I) IN THE CLUSTER TEST FACILITY

1984 ◽  
Vol 45 (C1) ◽  
pp. C1-101-C1-104
Author(s):  
T. Ando ◽  
S. Shimamoto ◽  
T. Hiyama ◽  
H. Tsuji ◽  
Y. Takahashi ◽  
...  
Keyword(s):  
Time Constant ◽  
Decay Time ◽  
Superconducting State ◽  
Heat Input ◽  
Test Facility ◽  
Test Results ◽  
Normal Zone ◽  
Out Of Plane ◽  
Force Mode ◽  
Test Module

An extended test of a 60-cm-bore Nb3Sn coil (TMC-I), constructed as a development of superconducting toroidal coil in tokamak machine, has been carried out in the cluster test facility. A 192-cm-length (one turn) normal zone, nucleated by a heat-input in the innermost turn, is recovered to superconducting state at 6 kA and 10 T. For the manual dump with a decay time constant of 6.6 sec (B = 1.0 T/sec), no damage is found on the TMC-I. In addition, a out-of-plane force mode operation, using one of the cluster test coils, is done with no trouble. With these good results, the first stage in TMC-I test was completed. And as the next stage, up-grading the cluster test facility for further TMC-I test in 11 T is now going ahead.

Mapping of electrical double-layer force between tip and sample surfaces in water with pulsed-force-mode atomic force microscopy

1997 ◽  
Vol 71 (18) ◽  
pp. 2632-2634 ◽  
Author(s):  
Tatsuya Miyatani ◽  
Miki Horii ◽  
Armin Rosa ◽  
Masamichi Fujihira ◽  
Othmar Marti
Keyword(s):  
Atomic Force Microscopy ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Force Microscopy ◽  
Atomic Force ◽  
Force Mode ◽  
Mode Atomic Force Microscopy

AFM with the Slope Compensation Technique for High-Speed Precision Measurement of Micro-Structured Surfaces

2008 ◽  
Vol 381-382 ◽  
pp. 35-38
Author(s):  
Yu Guo Cui ◽  
Bing Feng Ju ◽  
J. Aoki ◽  
Yoshikazu Arai ◽  
Wei Gao
Keyword(s):  
Precision Measurement ◽  
High Speed ◽  
Surface Profile ◽  
Scanning Speed ◽  
Constant Force ◽  
Capacitance Sensor ◽  
Structured Surfaces ◽  
Constant Height ◽  
Force Mode ◽  
Compensation Technique

In this paper, we applied the contact constant-height mode together with the pre-compensation technique which can realize the capability of high speed as well as faithful topographical image. Before scanning, the slope variation of the micro-structured surface was measured by the capacitance sensor and then stored in a PC. During the surface profile scanning, a piezoelectric actuator is applied which can provide the inconsecutive motion that corresponds to the pre-measured slope variation. As a result, the precision measurement can also be achieved. The validity of the proposed method and its performance are verified by compare the topographical images that were gained by the contact constant-force mode with feedback control. However, the scanning speed of our method is obviously high.

Research on the single anchor node moving strategy based on the weighted virtual force mode

2018 ◽  
Vol 22 (S4) ◽  
pp. 9027-9036
Author(s):  
Lian-suo Wei ◽  
Hong-bin Wang ◽  
Xian-cheng Hu
Keyword(s):  
Anchor Node ◽  
Virtual Force ◽  
Force Mode

scholarly journals Equifinality and its violations in a redundant system: multifinger accurate force production

2013 ◽  
Vol 110 (8) ◽  
pp. 1965-1973 ◽  
Author(s):  
Luke Wilhelm ◽  
Vladimir M. Zatsiorsky ◽  
Mark L. Latash
Keyword(s):  
Force Production ◽  
Uncontrolled Manifold ◽  
Total Force ◽  
Redundant System ◽  
Uncontrolled Manifold Hypothesis ◽  
Final State ◽  
Performance Variables ◽  
Force Mode ◽  
Finger Forces ◽  
The Individual

We explored a hypothesis that transient perturbations applied to a redundant system result in equifinality in the space of task-related performance variables but not in the space of elemental variables. The subjects pressed with four fingers and produced an accurate constant total force level. The “inverse piano” device was used to lift and lower one of the fingers smoothly. The subjects were instructed “not to intervene voluntarily” with possible force changes. Analysis was performed in spaces of finger forces and finger modes (hypothetical neural commands to fingers) as elemental variables. Lifting a finger led to an increase in its force and a decrease in the forces of the other three fingers; the total force increased. Lowering the finger back led to a drop in the force of the perturbed finger. At the final state, the sum of the variances of finger forces/modes computed across repetitive trials was significantly higher than the variance of the total force/mode. Most variance of the individual finger force/mode changes between the preperturbation and postperturbation states was compatible with constant total force. We conclude that a transient perturbation applied to a redundant system leads to relatively small variance in the task-related performance variable (equifinality), whereas in the space of elemental variables much more variance occurs that does not lead to total force changes. We interpret the results within a general theoretical scheme that incorporates the ideas of hierarchically organized control, control with referent configurations, synergic control, and the uncontrolled manifold hypothesis.

scholarly journals AFM in peak force mode applied to worn siloxane-hydrogel contact lenses

2015 ◽  
Vol 128 ◽  
pp. 61-66 ◽  
Author(s):  
Clara Abadías ◽  
Carme Serés ◽  
Juan Torrent-Burgués
Keyword(s):  
Contact Lenses ◽  
Peak Force ◽  
Force Mode

scholarly journals Risk assessment of sea ice disasters on fixed jacket platforms in the Liaodong Bay

2018 ◽  
Author(s):  
Ning Xu ◽  
Shuai Yuan ◽  
Xueqin Liu ◽  
Yuxian Ma ◽  
Wenqi Shi ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Sea Ice ◽  
Bohai Sea ◽  
Vulnerability Index ◽  
Structural Vulnerability ◽  
Liaodong Bay ◽  
The Bohai Sea ◽  
Oil Platforms ◽  
Force Mode ◽  
Ice Force

Abstract. Sea ice disasters seriously threaten the safety of oil platforms in the Bohai Sea. Therefore, it is necessary to carry out the risk assessment of sea ice disasters on oil platforms in the Bohai Sea. In the study, the risk assessment of sea ice disasters on fixed jacket platforms in the Liaodong Bay was performed. Firstly, the formation mechanisms of sea ice disasters were analyzed and the sources and modes of sea ice risks were clarified. Secondly, according to the calculation formulas of extreme ice force, dynamic ice force and accumulated force, several ice indices such as thickness, motion, strength, period, and concentration were proposed as the hazard indices and corresponding values were assigned to the proposed indices based on ice conditions in the Bohai Sea. Thirdly, based on four structural failure modes (structures overturned by the extreme ice force (Mode 1), structural fracture failure caused by dynamic ice force (Mode 2), facility damage caused by the dynamic ice force (Mode 3), and structural function failure caused by accumulated ice (Mode 4)), the structural vulnerability index, overturning index, dynamic index, ice-induced vibration index, and function index were proposed and corresponding values were assigned to the structural vulnerability index of fixed jacket platforms in the Liaodong Bay. Fourthly, the weight of each risk index was determined according to previous sea ice disasters and accidents and the sea ice risk was calculated with the weighted synthetic index method. Finally, with the above index system and risk assessment methods, the risk assessment of sea ice disasters on 10 jacket platforms in three sea areas in the Liaodong Bay was carried out. The analysis results showed that efficient sea ice prevention strategies could largely mitigate the sea ice-induced vibration-related risks of jacket platforms in the Liaodong Bay. If steady-state vibration occurred (usually in front of the vertical legged structure) or the structural fundamental frequency was high, the structural vulnerability was significantly increased and the calculated risk levels were high. The sea ice risk assessment method can be applied in the design, operation, and management of other engineering structures in sea ice areas.

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