Carbon Super-Springs

2010 ◽  
Vol 132 (03) ◽  
pp. 30-35
Author(s):  
Carol Livermore
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Mechanical Energy ◽  
Small Diameter ◽  
Low Leakage ◽  
Test Models ◽  
Large Numbers ◽  
Ideal System ◽  
Single Walled Cnts

This article highlights the advantages of carbon nanotubes (CNT) and their high potential in the mechanical engineering fields. It also demonstrates comparison between a CNT and normal spring use. Carbon nanotubes have the potential to store a thousand times more mechanical energy, pound for pound, than steel springs. Lab results point to a day when nanotube-powered bikes and lawn equipment could become practical. The test models have made it clear that from an energy storage standpoint, the ideal system would be composed of large numbers of long, small-diameter, single-walled CNTs arranged in well-ordered groupings and loaded in tension. The results point up the need for more work to be done to understand how interactions among carbon nanotubes can both enhance and limit the performance of CNT springs. Applications requiring long-term, low-leakage energy storage are good candidates for CNT-based elastic energy storage technology.

Enhanced dielectric, ferroelectric, energy storage and mechanical energy harvesting performance of ZnO-PVDF composites induced by MWCNT as an additive third phase

Soft Matter ◽  
2021 ◽  
Author(s):  
Shewli Pratihar ◽  
Aniket Patra ◽  
Abhishek Sasmal ◽  
Samar Kumar Medda ◽  
Shrabanee Sen
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Energy Harvesting ◽  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Third Phase ◽  
Poly Vinylidene Fluoride ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The present work highlights an attempt of fabricating a nanocomposite by addition of multi-walled carbon nanotubes (MWCNT) as third phase into flexible ZnO-Poly(vinylidene fluoride) (ZnO-PVDF) composites. MWCNT played very important...

The wind-evoked escape behavior of the cricket Gryllus bimaculatus: integration of behavioral elements

1995 ◽  
Vol 198 (9) ◽  
pp. 1895-1907 ◽  
Author(s):  
E Tauber ◽  
J Camhi
Keyword(s):  
Energy Storage ◽  
Motor Neurons ◽  
Alternative Energy ◽  
High Speed ◽  
Escape Behavior ◽  
Mechanical Energy ◽  
Gryllus Bimaculatus ◽  
High Speed Video ◽  
Co Activation

The wind-evoked escape behavior of freely ranging crickets (Gryllus bimaculatus) was studied using high-speed video and film analysis. The escape response can be of three types: a turn, a jump or a turn + jump. Any of these can be followed by running. The turn is similar to that of the cockroach, in terms of the details of body and leg movements. A jump occurs only when the cricket has its back to the wind, either because the stimulus came approximately from behind or because the cricket had first turned away from the wind and then jumped. The jump, like that of locust, requires some form of energy storage and quick release to obtain the necessary power. Locusts use long-term co-activation of antagonistic leg motor neurons to produce mechanical energy storage. By contrast, crickets do not appear to co-activate antagonistic leg motor neurons. Possible alternative energy storage and release mechanisms are discussed.

Modeling mechanical energy storage in springs based on carbon nanotubes

2009 ◽  
Vol 20 (25) ◽  
pp. 255704 ◽  
Author(s):  
F A Hill ◽  
T F Havel ◽  
C Livermore
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Mechanical Energy

scholarly journals Mechanical Energy: Storage of Mechanical Energy Based on Carbon Nanotubes with High Energy Density and Power Density (Adv. Mater. 9/2019)

2019 ◽  
Vol 31 (9) ◽  
pp. 1970064
Author(s):  
Yunxiang Bai ◽  
Boyuan Shen ◽  
Shenli Zhang ◽  
Zhenxing Zhu ◽  
Silei Sun ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
Mechanical Energy ◽  
High Energy ◽  
High Energy Density

Superstrong Ultralong Carbon Nanotubes for Mechanical Energy Storage

2011 ◽  
Vol 23 (30) ◽  
pp. 3387-3391 ◽  
Author(s):  
Rufan Zhang ◽  
Qian Wen ◽  
Weizhong Qian ◽  
Dang Sheng Su ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Mechanical Energy

Computer Analyses in Preventive Health Research

1967 ◽  
Vol 06 (01) ◽  
pp. 8-14 ◽  
Author(s):  
M. F. Collen
Keyword(s):  
Medical Research ◽  
Preventive Medicine ◽  
Health Research ◽  
Large Scale ◽  
Preventive Health ◽  
New Era ◽  
Large Numbers ◽  
Normal Test ◽  
Computer Analyses

The utilization of an automated multitest laboratory as a data acquisition center and of a computer for trie data processing and analysis permits large scale preventive medical research previously not feasible. Normal test values are easily generated for the particular population studied. Long-term epidemiological research on large numbers of persons becomes practical. It is our belief that the advent of automation and computers has introduced a new era of preventive medicine.

A compact guided-wave EMAT with pulsed electromagnet for ferromagnetic tube inspection

2020 ◽  
Vol 64 (1-4) ◽  
pp. 951-958
Author(s):  
Tianhao Liu ◽  
Yu Jin ◽  
Cuixiang Pei ◽  
Jie Han ◽  
Zhenmao Chen
Keyword(s):  
Power Plants ◽  
Signal To Noise Ratio ◽  
Small Diameter ◽  
Performance Testing ◽  
Guided Wave ◽  
High Signal ◽  
Receiver Coil ◽  
Signal To Noise ◽  
Corrosion Defects

Small-diameter tubes that are widely used in petroleum industries and power plants experience corrosion during long-term services. In this paper, a compact inserted guided-wave EMAT with a pulsed electromagnet is proposed for small-diameter tube inspection. The proposed transducer is noncontact, compact with high signal-to-noise ratio and unattractive to ferromagnetic tubes. The proposed EMAT is designed with coils-only configuration, which consists of a pulsed electromagnet and a meander pulser/receiver coil. Both the numerical simulation and experimental results validate its feasibility on generating and receiving L(0,2) mode guided wave. The parameters for driving the proposed EMAT are optimized by performance testing. Finally, feasibility on quantification evaluation for corrosion defects was verified by experiments.

scholarly journals The Infrared Absolute Radiance Interferometer (ARI) for CLARREO

2020 ◽  
Vol 12 (12) ◽  
pp. 1915
Author(s):  
Joe K. Taylor ◽  
Henry E. Revercomb ◽  
Fred A. Best ◽  
David C. Tobin ◽  
P. Jonathan Gero
Keyword(s):  
Brightness Temperature ◽  
New Technologies ◽  
Spectral Radiance ◽  
Overall Design ◽  
Societal Challenges ◽  
Ideal System ◽  
Uncertainty Estimates ◽  
Infrared Spectrometer ◽  
Global Coverage

The Absolute Radiance Interferometer (ARI) is an infrared spectrometer designed to serve as an on-orbit radiometric reference with the ultra-high accuracy (better than 0.1 K 3‑σ or k = 3 brightness temperature at scene brightness temperature) needed to optimize measurement of the long-term changes of Earth’s atmosphere and surface. If flown in an orbit that frequently crosses sun-synchronous orbits, ARI could be used to inter-calibrate the international fleet of infrared (IR) hyperspectral sounders to similar measurement accuracy, thereby establishing an observing system capable of achieving sampling biases on high-information-content spectral radiance products that are also < 0.1 K 3‑σ. It has been shown that such a climate observing system with <0.1 K 2‑σ overall accuracy would make it possible to realize times to detect subtle trends of temperature and water vapor distributions that closely match those of an ideal system, given the limit set by the natural variability of the atmosphere. This paper presents the ARI sensor's overall design, the new technologies developed to allow on-orbit verification and test of its accuracy, and the laboratory results that demonstrate its capability. In addition, we describe the techniques and uncertainty estimates for transferring ARI accuracy to operational sounders, providing economical global coverage. Societal challenges posed by climate change suggest that a Pathfinder ARI should be deployed as soon as possible.

Interpenetrating Gels as Conducting/Adhering Matrices Enabling High-Performance Silicon Anodes

2021 ◽  
Author(s):  
Tingting Xia ◽  
Chengfei Xu ◽  
Pengfei Dai ◽  
Xiaoyun Li ◽  
Riming Lin ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Electrochemical Energy Storage ◽  
Active Materials ◽  
Silicon Anodes ◽  
Weak Binding ◽  
Binding Forces

Three-dimensional (3D) conductive polymers are promising conductive matrices for electrode materials toward electrochemical energy storage. However, their fragile nature and weak binding forces with active materials could not guarantee long-term...

scholarly journals Dispersion of Carbon Nanotubes with “Green” Detergents

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2908
Author(s):  
Kazuo Umemura ◽  
Ryo Hamano ◽  
Hiroaki Komatsu ◽  
Takashi Ikuno ◽  
Eko Siswoyo
Keyword(s):  
Carbon Nanotubes ◽  
Sodium Dodecyl ◽  
Detergent Solution ◽  
Absorbance Spectroscopy ◽  
Fundamental Research ◽  
The Stability ◽  
Single Walled Cnts ◽  
Better Than ◽  
Walled Cnts ◽  
Cnt Suspensions

Solubilization of carbon nanotubes (CNTs) is a fundamental technique for the use of CNTs and their conjugates as nanodevices and nanobiodevices. In this work, we demonstrate the preparation of CNT suspensions with “green” detergents made from coconuts and bamboo as fundamental research in CNT nanotechnology. Single-walled CNTs (SWNTs) with a few carboxylic acid groups (3–5%) and pristine multi-walled CNTs (MWNTs) were mixed in each detergent solution and sonicated with a bath-type sonicator. The prepared suspensions were characterized using absorbance spectroscopy, scanning electron microscopy, and Raman spectroscopy. Among the eight combinations of CNTs and detergents (two types of CNTs and four detergents, including sodium dodecyl sulfate (SDS) as the standard), SWNTs/MWNTs were well dispersed in all combinations except the combination of the MWNTs and the bamboo detergent. The stability of the suspensions prepared with coconut detergents was better than that prepared with SDS. Because the efficiency of the bamboo detergents against the MWNTs differed significantly from that against the SWNTs, the natural detergent might be useful for separating CNTs. Our results revealed that the use of the “green” detergents had the advantage of dispersing CNTs as well as SDS.

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