scholarly journals Green Fabrication of Nanoscale Energetic Molecular Perovskite (H2dabco)[Na(ClO4)3] with Reduced Mechanical Sensitivity

2021 ◽  
Vol 18 (3) ◽  
pp. 369-384
Author(s):  
Li-shuang Hu ◽  
Zelin Du ◽  
Yang Liu ◽  
Shida Gong ◽  
Chunyu Guang ◽  
...  
Keyword(s):  
Mechanical Sensitivity

scholarly journals Design and optimization of differential capacitive micro accelerometer for vibration measurement

2021 ◽  
Vol 30 (1) ◽  
pp. 19-27
Author(s):  
Kumar Gomathi ◽  
Arunachalam Balaji ◽  
Thangaraj Mrunalini
Keyword(s):  
Software Design ◽  
Proof Mass ◽  
Vibration Measurement ◽  
Design Parameters ◽  
Mechanical Sensitivity ◽  
Design And Optimization ◽  
Capacitive Accelerometer ◽  
Cross Axis ◽  
Micro Accelerometer

Abstract This paper deals with the design and optimization of a differential capacitive micro accelerometer for better displacement since other types of micro accelerometer lags in sensitivity and linearity. To overcome this problem, a capacitive area-changed technique is adopted to improve the sensitivity even in a wide acceleration range (0–100 g). The linearity is improved by designing a U-folded suspension. The movable mass of the accelerometer is designed with many fingers connected in parallel and suspended over the stationary electrodes. This arrangement gives the differential comb-type capacitive accelerometer. The area changed capacitive accelerometer is designed using Intellisuite 8.6 Software. Design parameters such as spring width and radius, length, and width of the proof mass are optimized using Minitab 17 software. Mechanical sensitivity of 0.3506 μm/g and Electrical sensitivity of 4.706 μF/g are achieved. The highest displacement of 7.899 μm is obtained with a cross-axis sensitivity of 0.47%.

scholarly journals Cystitis increases colorectal afferent sensitivity in the mouse

2009 ◽  
Vol 297 (6) ◽  
pp. G1250-G1258 ◽  
Author(s):  
Pablo Rodolfo Brumovsky ◽  
Bin Feng ◽  
Linjing Xu ◽  
Carly Jane McCarthy ◽  
G. F. Gebhart
Keyword(s):  
Urinary Bladder ◽  
Treated Group ◽  
Mechanical Sensitivity ◽  
Pelvic Nerve ◽  
Treatment Groups ◽  
Colon Inflammation ◽  
Afferent Fibers ◽  
Peripheral Mechanism ◽  
Inflammatory Soup

Studies in humans and rodents suggest that colon inflammation promotes urinary bladder hypersensitivity and, conversely, that cystitis contributes to colon hypersensitivity, events referred to as cross-organ sensitization. To investigate a potential peripheral mechanism, we examined whether cystitis alters the sensitivity of pelvic nerve colorectal afferents. Male C57BL/6 mice were treated with cyclophosphamide (CYP) or saline, and the mechanosensitive properties of single afferent fibers innervating the colorectum were studied with an in vitro preparation. In addition, mechanosensitive receptive endings were exposed to an inflammatory soup (IS) to study sensitization. Urinary bladder mechanosensitive afferents were also tested. We found that baseline responses of stretch-sensitive colorectal afferents did not differ between treatment groups. Whereas IS excited a proportion of colorectal afferents CYP treatment did not alter the magnitude of this response. However, the number of stretch-sensitive fibers excited by IS was increased relative to saline-treated mice. Responses to IS were not altered by CYP treatment, but the proportion of IS-responsive fibers was increased relative to saline-treated mice. In bladder, IS application increased responses of muscular afferents to stretch, although no differences were detected between saline- and CYP-treated mice. In contrast, their chemosensitivity to IS was decreased in the CYP-treated group. Histological examination revealed no changes in colorectum and modest edema and infiltration in the urinary bladder of CYP-treated mice. In conclusion, CYP treatment increased mechanical sensitivity of colorectal muscular afferents and increased the proportion of chemosensitive colorectal afferents. These data support a peripheral contribution to cross-organ sensitization of pelvic organs.

MOF as the rigid shell to improve the mechanical sensitivity of nitramine explosives

2021 ◽  
pp. 130940
Author(s):  
Shuang Wang ◽  
Li Yang ◽  
Jimin Han ◽  
Zhenzhan Yan
Keyword(s):  
Mechanical Sensitivity ◽  
Rigid Shell

Models of the mechanical sensitivity and growth of otoliths in fish

2003 ◽  
Vol 13 (4-6) ◽  
pp. 189-203
Author(s):  
Alexander V. Kondrachuk
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Oscillator Model ◽  
Distributed Model ◽  
Mechanical Sensitivity ◽  
Otolith Growth ◽  
Altered Gravity ◽  
Gel Layer ◽  
Longitudinal Size ◽  
Spatially Distributed

It has been suggested that, in the fish, the change of otolith mass during development under altered gravity conditions [1,2,3,4,5,6,24,25,36,37] and the growth of otoliths in normal conditions [22,23,26], are determined by feedback between otolith dynamics and the processes that regulate otolith growth. The hypothesis originates from an oscillator model of the otolith [30] in which otolith mass is one of the parameters. However, the validity of this hypothesis is not obvious and has not been experimentally verified. We tested this hypothesis by comparing the oscillator model with a simplified spatially distributed model of the otolith. It was shown that in the case of a spatially distributed fixation of the otolith plate (otoconial layer) to the macular surface, the mechanical sensitivity of the otolith does not depend on the total otolith mass nor on its longitudinal size. It is determined by otolith thickness, the Young's modulus and viscosity of gel layer of the growing otolith. These parameters may change in order to maintain otolith sensitivity under conditions (such as growth or altered gravity) that change the dynamics of otolith movement.

Mechanical sensitivity of group III and IV afferents from posterior articular nerve in normal and inflamed cat knee

1986 ◽  
Vol 55 (4) ◽  
pp. 635-643 ◽  
Author(s):  
P. Grigg ◽  
H. G. Schaible ◽  
R. F. Schmidt
Keyword(s):  
Sciatic Nerve ◽  
Knee Joint ◽  
Conduction Velocity ◽  
Mechanical Stimulation ◽  
Dorsal Root ◽  
Receptive Fields ◽  
Group Iv ◽  
Mechanical Sensitivity ◽  
Group Iii ◽  
Stimulation Of

Recordings were performed from sciatic nerve or dorsal root filaments in 28 cats to study single group III (conduction velocity 2.5-20 m/s) and group IV (conduction velocity less than 2.5 m/s) units supplying the knee joint via the posterior articular nerve (PAN). In seven of these cats the knee joint had been inflamed artificially. Recordings from sciatic nerve filaments revealed responses to local mechanical stimulation of the joint in only 3 of 41 group IV units and in 12 of 18 group III units from the normal joint. In the inflamed joint 14 of 36 group IV units and 24 of 36 group III units were excited with local mechanical stimulation. In recordings from dorsal root filaments (normal joint) 4 of 11 group IV units and 7 of 13 group III units were activated by stimulating the joint locally. In the normal joint four group IV units (recorded from dorsal root filaments) responded only to rotations against the resistance of the tissue, whereas the majority of the fibers did not respond even to forceful movements. Group III units with local mechanosensitivity in the normal joint reacted strongly or weakly to movements in the working range of the joint or only to movements against resistance of the tissue. In the inflamed joint, group IV fibers (recorded in sciatic nerve filaments) with detectable receptive fields responded strongly to gentle movements or only to movements against resistance of tissue. Some did not react to movements. Group III units reacted strongly or weakly to gentle movements or only to movements against resistance of the tissue.(ABSTRACT TRUNCATED AT 250 WORDS)

Sensitivity in Large Deflection of Bossed and Pre-Tensioned Layered Plate under Lateral Load

2008 ◽  
Vol 47-50 ◽  
pp. 33-36
Author(s):  
Chun Fu Chen ◽  
Yu Chou Wu
Keyword(s):  
Large Deflection ◽  
Plate Theory ◽  
Single Layer ◽  
Radial Force ◽  
Iteration Scheme ◽  
Layered Plate ◽  
Mechanical Sensitivity ◽  
Initial Tension ◽  
Numerical Iteration ◽  
Over The Top

Mechanical sensitivity of a bossed and clamped layered isotropic circular plate with pretension in large deflection is evaluated. The approach extends Von-Karman’s plate theory for large deflection to a symmetrically layered plate with a center boss. The derived nonlinear governing equations are solved using a finite difference method incorporating a numerical iteration scheme in finding the lateral slope and radial force resultant. The obtained geometrical responses are further manipulated to calculate the associated mechanical sensitivity. For a 3-layered plate with nearly the same layer moduli, the results correlate well with those following available formulation for a single-layer isotropic plate. The developed approach is then implemented for various initial tensions, lateral pressures as well as different boss sizes and ratios between the layer moduli. The obtained numerical results show that, initial tension appears to have the strongest influence upon the radial variation of mechanical sensitivity over the top surface of the bossed layered plate. While both the size of center boss and magnitude of lateral pressure can still have a significant effect, the mechanical sensitivity seems to be insensitive to the change of the ratio between layer moduli for a bossed and symmetrically layered plate.

Correlating Mechanical Sensitivity with Spin Transition in the Explosive Spin Crossover Complex [Fe(Htrz)3]n[ClO4]2n

2020 ◽  
Vol 142 (10) ◽  
pp. 4842-4851 ◽  
Author(s):  
Thuy-Ai D. Nguyen ◽  
Jacqueline M. Veauthier ◽  
Gary F. Angles-Tamayo ◽  
David E. Chavez ◽  
Ekaterina Lapsheva ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Spin Transition ◽  
Mechanical Sensitivity
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