2013 ◽  
Vol 42 (4) ◽  
pp. 1213-1225 ◽  
Author(s):  
N. J. M. Prater ◽  
K. R. Brye ◽  
S. Dunn ◽  
T. S. Soerens ◽  
A. N. Sharpley ◽  
...  

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Liangdong Sun ◽  
Hongcheng Gu ◽  
Xiaojiang Liu ◽  
Haibin Ni ◽  
Qiwei Li ◽  
...  

AbstractConventional atomic force microscopy (AFM) tips have remained largely unchanged in nanomachining processes, constituent materials, and microstructural constructions for decades, which limits the measurement performance based on force-sensing feedbacks. In order to save the scanning images from distortions due to excessive mechanical interactions in the intermittent shear-mode contact between scanning tips and sample, we propose the application of controlled microstructural architectured material to construct AFM tips by exploiting material-related energy-absorbing behavior in response to the tip–sample impact, leading to visual promotions of imaging quality. Evidenced by numerical analysis of compressive responses and practical scanning tests on various samples, the essential scanning functionality and the unique contribution of the cellular buffer layer to imaging optimization are strongly proved. This approach opens new avenues towards the specific applications of cellular solids in the energy-absorption field and sheds light on novel AFM studies based on 3D-printed tips possessing exotic properties.


2008 ◽  
Vol 13 (8) ◽  
pp. 665-670 ◽  
Author(s):  
Kelli S. Hart ◽  
Brad D. Lee ◽  
Philip J. Schoeneberger ◽  
Donald P. Franzmeier ◽  
Phillip R. Owens ◽  
...  

2014 ◽  
Vol 532 ◽  
pp. 297-300 ◽  
Author(s):  
Chang Chun Yu

It introduces ways and means of designing this kind of vibration absorbers which are presented using parallel mechanisms as the main mechanisms ,it ,which takes the parallel mechanisms with 3-DOF translation as an example, validates the feasibility of the method, and enumerates some of the parallel mechanisms that are fit for multi-DIM vibration absorber. In a word, the multi-DIM vibration absorber system based on parallel mechanism is a new idea and breakthrough in multi-DIM vibration absorption field, which has the characteristic of simple structure, compact mechanism, high accuracy, partially or fully decoupled mechanism easy for control and so on, and provides a new method for the study of Multi-DIM vibration.


2018 ◽  
Vol 923 ◽  
pp. 3-7
Author(s):  
Yong Jie Yan ◽  
Qing Qing Ni

Barium titanate/graphene oxide/polyurethane (BTO@GO@PU) composite membranes for microwave absorption were designed and fabricated by mechanical-blending of BTO and GO in PU medium, followed by mold formation. The cross section morphology of the BTO@GO@PU membrane indicated that the BTO nanoparticles with 450 nm average diameter are successfully incorporated into the PU matrix. Mechanical tensile measurement showed that, as the amount of BTO nanoparticles increased from 5 wt% to 20 wt%, the elastic modulus of the corresponding membrane increased up to 23.0 MPa elongation with the elongation above 450 %. Microwave absorption property of the BTO@GO@PU membranes were evaluated by measuring its reflection loss in the frequency range of 0.1-18 GHz. With the addition of BTO up to 20 wt%, the maximum absorptivity of the composite reached up to 51 %. This is attributed to the dielectric loss of BTO nanoparticles.


2016 ◽  
Vol 41 (18) ◽  
pp. 4202 ◽  
Author(s):  
Mamatha Venugopal ◽  
Peter van Es ◽  
Srirang Manohar ◽  
Debasish Roy ◽  
Ram Mohan Vasu

Author(s):  
Stuart M. Newman ◽  
Paul D. Green ◽  
Igor V. Ptashnik ◽  
Tom D. Gardiner ◽  
Marc D. Coleman ◽  
...  

Remote sensing of the atmosphere from space plays an increasingly important role in weather forecasting. Exploiting observations from the latest generation of weather satellites relies on an accurate knowledge of fundamental spectroscopy, including the water vapour continuum absorption. Field campaigns involving the Facility for Airborne Atmospheric Measurements research aircraft have collected a comprehensive dataset, comprising remotely sensed infrared radiance observations collocated with accurate measurements of the temperature and humidity structure of the atmosphere. These field measurements have been used to validate the strength of the infrared water vapour continuum in comparison with the latest laboratory measurements. The recent substantial changes to self-continuum coefficients in the widely used MT_CKD (Mlawer–Tobin–Clough–Kneizys–Davies) model between 2400 and 3200 cm −1 are shown to be appropriate and in agreement with field measurements. Results for the foreign continuum in the 1300–2000 cm −1 band suggest a weak temperature dependence that is not currently included in atmospheric models. A one-dimensional variational retrieval experiment is performed that shows a small positive benefit from using new laboratory-derived continuum coefficients for humidity retrievals.


2005 ◽  
Vol 30 (24) ◽  
pp. 3311 ◽  
Author(s):  
Guillaume Legros ◽  
José L. Torero ◽  
Andrés Fuentes ◽  
Philippe Ben-Abdallah ◽  
Jacques Baillargeat ◽  
...  

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