scholarly journals II. The Bakerian lecture.—On the electro-dynamic properties of metals

1857 ◽  
Vol 8 ◽  
pp. 50-55 ◽  
Keyword(s):  
Electric Conductivity ◽  
Dynamic Properties ◽  
Mechanical Strain ◽  
Thermo Electric ◽  
Electric Convection

The Lecturer gave an exposition of the substance of a paper presented by him to the Society under the above title. The paper consists of five parts, namely:— 1. On the Electric Convection of Heat; 2. On Thermo-electric Inversions; 3. On the Effects of Mechanical Strain and of Magnetization on the Thermo-electric Qualities of Metals; 4. On Methods for comparing and testing Galvanic Resistances, illustrated by Preliminary Experiments on the Effects of Tension and Magnetization on the Electric Conductivity of Metals; 5. On the Effects of Magnetization on the Electric Conductivity of Iron.

A Study on Thermal and Electrical Conductivities of Ethylene-Butene Copolymer Composites with Carbon Fibers

2021 ◽  
Vol 36 (4) ◽  
pp. 417-422
Author(s):  
Y. Hamid ◽  
P. Svoboda
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Electric Conductivity ◽  
Carbon Fibers ◽  
Mechanical Strain ◽  
Electric Resistance ◽  
Resistance Change ◽  
Electrical Conductivities ◽  
Fiber Sample

Abstract Ethylene-butene copolymer (EBC)/carbon-fiber (CF) composites can be utilized as an electromechanical material due to their ability to change electric resistance with mechanical strain. The electro-mechanical properties and thermal conductivity of ethylene butene copolymer (EBC) composites with carbon fibers were studied. Carbon fibers were introduced to EBC with various concentrations (5 to 25 wt%). The results showed that carbon fibers’ addition to EBC improves the electric conductivity up to 10 times. Increasing the load up to 2.9 MPa will raise the electric resistance change by 4 500% for a 25% fiber sample. It is also noted that the EBC/CF composites’ electric resistance underwent a dramatic increase in raising the strain. For example, the resistance change was around 13 times higher at 15% strain compared to 5% strain. The thermal conductivity tests showed that the addition of carbon fibers increases the thermal conductivity by 40%, from 0.19 to 0.27 Wm–1K–1.

Improvement on Thermoelectric Characteristics of Layered Nanostructure by Ion Beam Bombardment

2006 ◽  
Vol 929 ◽  
Author(s):  
Bangke Zheng ◽  
S. Budak ◽  
C. Muntele ◽  
Z. Xiao ◽  
S. Celaschi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Electric Conductivity ◽  
Ion Beam ◽  
Thermo Electric ◽  
Super Lattice ◽  
Before And After ◽  
The Cross ◽  
Nano Cluster ◽  
P Type

ABSTRACTWe made p-type nanoscale super lattice thermoelectric cooling devices which consist of multiple periodic layers of Si1−x Gex / Si, The thickness of each layer ranges between 10 and 50 nm. The super lattice was bombarded by 5 MeV Si ion with different fluencies aiming to form nano-cluster quantum dot structures. We estimated the thermo-electric efficiency of the so fabricated devices, measuring the thin film cross plane thermal conductivity by the 3rd harmonic method, measuring the cross plane Seebeck coefficient, and finally measuring the cross plane electric conductivity before and after ion bombardment. As predicted, the thermo-electric Figure of Merit of the films increases with increasing Si ion fluencies. In addition to the effect of quantum well confinement of the phonon transmission, the nano-scale crystal quantum dots produced by the incident Si beam further adversely affects the thermal conductivity by absorbing and dissipating phonon along the lattice, and therefore further reduces the cross plane thermal conductivity, This process increases the electron density of state therefore increasing Seebeck coefficient, and the electric conductivity.

2. Laboratory Notes: On Thermo-Electricity

1872 ◽  
Vol 7 ◽  
pp. 308-309 ◽  
Author(s):  
Tait
Keyword(s):  
Thermal Conductivity ◽  
Electric Conductivity ◽  
Experimental Results ◽  
The Other ◽  
Dissipation Of Energy ◽  
Electric Convection

In a paper presented to the Society in 1867–8 I deduced from certain hypothetical considerations regarding Dissipation of Energy results connected with the thermal and electric conductivity of bodies, the electric convection of heat, &c. As these were all of a confessedly somewhat speculative character, I printed at the time only that connected with thermal conductivity, which I had the means of comparing with experiment, and which seemed to accord fairly with Forbes' experimental results. But the assumption on which this was based was essentially involved in all the other portions of the paper.

4. On the Dissipation of Energy

1869 ◽  
Vol 6 ◽  
pp. 309-311 ◽  
Author(s):  
Tait
Keyword(s):  
The Other ◽  
Electric Currents ◽  
Thermo Electric ◽  
Dissipation Of Energy ◽  
Electric Convection

The paper contains some curious applications of the principle of dissipation to the conduction of heat, the connection of heat and electricity, thermo-electric currents, the electric convection of heat, &c. But in this abstract we confine ourselves to one very simple case of the conduction of heat, as the hypothesis on which it is investigated is fundamentally assumed in all the other applications.

scholarly journals DC conductivity with external magnetic field in hyperscaling violating geometry

2018 ◽  
Vol 33 (04) ◽  
pp. 1850028 ◽  
Author(s):  
Neha Bhatnagar ◽  
Sanjay Siwach
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electric Conductivity ◽  
Dc Conductivity ◽  
Gauge Fields ◽  
Liouville Type ◽  
Thermo Electric ◽  
Analytic Expressions ◽  
Momentum Relaxation ◽  
Type Potential

We investigate the holographic DC conductivity of (2[Formula: see text]+[Formula: see text]1)-dimensional systems while considering hyperscaling violating geometry in bulk. We consider Einstein–Maxwell-dilaton system with two gauge fields and Liouville-type potential for dilaton. We also consider axionic fields in bulk to introduce momentum relaxation in the system. We apply an external magnetic field to study the response of the system and obtain analytic expressions for DC conductivity, Hall angle and (thermo)electric conductivity.

6. Laboratory Notes by Professor Tait (c) The Electric Conductivity of Nickel

1878 ◽  
Vol 9 ◽  
pp. 120-123
Author(s):  
C. Michie Smith ◽  
J. Gordon MacGregor
Keyword(s):  
Electric Conductivity ◽  
Thermoelectric Properties ◽  
Pure Nickel ◽  
Nickel Foil ◽  
Thermo Electric

Pure nickel foil, obtained in Paris by Dr Andrews, was cut into spiral about 20 inches long, and it was on this spiral that all the following experiments were made. During the month of November 1875 a large number of experiments were made as to its thermoelectric properties, and these were found to be almost identical with that of the specimen from observations on which the line was laid down on the “thermo-electric diagram.” (Trans. R.S.E., 1872–3.) This line, it will be remembered, is a peculiar one, and is very similar to that of iron, with this difference, that the peculiar changes take place at much lower temperatures in nickel than in iron.

Effects of mechanical strain on the electric conductivity of multiwalled carbon nanotube (MWCNT)/polyurethane (PU) composites

2009 ◽  
Vol 10 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Sang-Do Lee ◽  
Oh-Jin Kwon ◽  
Byoung Chul Chun ◽  
Jae Whan Cho ◽  
Jong-Shin Park
Keyword(s):  
Carbon Nanotube ◽  
Electric Conductivity ◽  
Mechanical Strain ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon

The distribution of antigen on the surface of RBL-2H3 rat basophilic leukemia cells observed by back-scattered electron imaging

1986 ◽  
Vol 44 ◽  
pp. 274-275
Author(s):  
R.F. Stump ◽  
J.R. Pfeiffer ◽  
JC. Seagrave ◽  
D. Huskisson ◽  
J.M. Oliver
Keyword(s):  
Cell Surface ◽  
Dynamic Properties ◽  
Leukemia Cells ◽  
Antigen Binding ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Rat Basophilic Leukemia Cells ◽  
Electron Imaging ◽  
Basophilic Leukemia

In RBL-2H3 rat basophilic leukemia cells, antigen binding to cell surface IgE-receptor complexes stimulates the release of inflammatory mediators and initiates a series of membrane and cytoskeletal events including a transformation of the cell surface from a microvillous to a lamellar topography. It is likely that dynamic properties of the IgE receptor contribute to the activation of these responses. Fewtrell and Metzger have established that limited crosslinking of IgE-receptor complexes is essential to trigger secretion. In addition, Baird and colleagues have reported that antigen binding causes a rapid immobilization of IgE-receptor complexes, and we have demonstrated an apparent increase with time in the affinity of IgE-receptor complexes for antigen.

Nucleosome dynamics

2006 ◽  
Vol 73 ◽  
pp. 109-119 ◽  
Author(s):  
Chris Stockdale ◽  
Michael Bruno ◽  
Helder Ferreira ◽  
Elisa Garcia-Wilson ◽  
Nicola Wiechens ◽  
...  
Keyword(s):  
High Resolution ◽  
Chromatin Structure ◽  
Current Knowledge ◽  
Dynamic Properties ◽  
Structure And Dynamics ◽  
Nucleosome Dynamics ◽  
Sharp Focus ◽  
Recent Advances ◽  
Insight Into ◽  
Chromatin Structure And Dynamics

In the 30 years since the discovery of the nucleosome, our picture of it has come into sharp focus. The recent high-resolution structures have provided a wealth of insight into the function of the nucleosome, but they are inherently static. Our current knowledge of how nucleosomes can be reconfigured dynamically is at a much earlier stage. Here, recent advances in the understanding of chromatin structure and dynamics are highlighted. The ways in which different modes of nucleosome reconfiguration are likely to influence each other are discussed, and some of the factors likely to regulate the dynamic properties of nucleosomes are considered.

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