First Order Reversal Curves (FORC) Diagrams of Co Nanowire Arrays

2008 ◽  
Vol 8 (11) ◽  
pp. 5725-5732 ◽  
Author(s):  
M. Ciureanu ◽  
F. Béron ◽  
P. Ciureanu ◽  
R. W. Cochrane ◽  
D. Ménard ◽  
...  
Keyword(s):  
Wire Diameter ◽  
Nanowire Arrays ◽  
Wire Length ◽  
First Order ◽  
Factors Influencing ◽  
Theoretical Predictions ◽  
Nanoporous Alumina Templates ◽  
The Wire ◽  
The Individual ◽  
Array Geometry

Nanowire arrays of Co and Ni have been obtained by current pulse electrodeposition into nanoporous alumina templates. By adjusting the pH of the bath, the microstructure of the Co wires was tailored, resulting in two types of arrays of crystalline Co—hcp, with c-axis nominally parallel (Co (c∥)), or nominally perpendicular (Co (c⊥)) to the wire. First-order reversal curve (FORC) diagrams provide information on average coercivity of the individual nanowire and the factors influencing the field created in the saturated array by the magnetostatic interactions. The dependences of this field on array geometry (wire length and diameter) and saturation magnetization were found to be in excellent agreement with theoretical predictions from a micromagnetic model. For arrays with lower wire diameter, the average coercivity of the individual wires is systematically higher than the coercivity of the array. The most important difference between the two Co series is in the dependence of the FORC diagrams on the wire diameter, with the Co (c⊥) showing significant pattern changes at large diameters. Two possible sources of those changes are discussed.

Reviewing hook degradation to promote ejection after ingestion by marine fish

2011 ◽  
Vol 62 (10) ◽  
pp. 1237 ◽  
Author(s):  
Shane P. McGrath ◽  
Paul A. Butcher ◽  
Matt K. Broadhurst ◽  
Stuart C. Cairns
Keyword(s):  
Carbon Steel ◽  
Marine Fish ◽  
Quantitative Data ◽  
Wire Diameter ◽  
Wire Material ◽  
Technical Factors ◽  
The Wire ◽  
Negative Impacts ◽  
The Individual

A widely recommended strategy for releasing fish that have ingested hooks is to simply cut the line. The utility of this approach is based on the premise that the individual will eventually eject the hook following sufficient oxidation. However, few quantitative data are available describing the mechanisms affecting hook decay. We addressed this issue by testing the independence of various technical factors on the degradation of 828 hooks comprising 23 designs (absolute sizes 227–611 mm2) after protracted submersion in seawater. Twelve replicates of each hook were destructively assessed for compression and tensile strengths (using a force gauge) and 24 replicates were weighed, photographed and submersed in seawater. After submersion for 8 and 28 days, 12 replicate hooks were removed, re-photographed, re-weighed and tested for compression and tensile strengths to provide indices of decay. Hook degradation was mainly affected by the wire material and diameter and could be significantly promoted by choosing carbon steel designs, either with a wire diameter of ≤0.9 mm for the examined sizes or, alternatively, bait-holder barbs (or similar modifications) along the shaft. By rapidly oxidising and weakening after ingestion, such designs could ultimately help to reduce negative impacts of hooks on released fish.

Thermoelectric Potential of Bi and Bi1−x Sbx Nanowire Arrays

2001 ◽  
Vol 691 ◽  
Author(s):  
M. S. Dresselhaus ◽  
Y.-M. Lina ◽  
O. Rabin ◽  
S. B. Cronin ◽  
M. R. Black ◽  
...  
Keyword(s):  
Thermoelectric Material ◽  
High Performance ◽  
Wire Diameter ◽  
Nanowire Arrays ◽  
Thermoelectric Performance ◽  
The Wire ◽  
Low Dimensional

ABSTRACTThe potential of Bi and Bi1−x Sbx nanowire arrays for thermoelectric applications is discussed. The advantages of bismuth as a low dimensional thermoelectric material are enumerated and the role of modeling is emphasized. The advantages of using the Sb concentration as well as the wire diameter as materials parameters for optimizing the thermoelectric performance of these nanowires are discussed, with particular emphasis given to the development of a high performance p-type nanowire thermoelectric material.

scholarly journals Self inductance of a wire loop as a curve integral

2016 ◽  
Vol 5 (1) ◽  
pp. 1 ◽  
Author(s):  
R. Dengler
Keyword(s):  
Cross Section ◽  
Mutual Inductance ◽  
Second Order ◽  
The Self ◽  
Wire Radius ◽  
Wire Length ◽  
Wire Loop ◽  
First Order ◽  
The Wire ◽  
Sharp Corners

It is shown that the self inductance of a wire loop can be written as a curve integral akin to the Neumann formula for the mutual inductance of two wire loops. The only difference is that contributions where the two integration variables get too close to each other must be excluded from the curve integral and evaluated in detail. The contributions of these excluded segments depend on the distribution of the current in the cross section of the wire. They add to a simple constant proportional to the wire length. The error of the new expression is of first order in the wire radius if there are sharp corners and of second order in the wire radius for smooth wire loops.

scholarly journals Facile decoding of quantitative signatures from magnetic nanowire arrays

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohammad Reza Zamani Kouhpanji ◽  
Ali Ghoreyshi ◽  
P. B. Visscher ◽  
Bethanie J. H. Stadler
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowires ◽  
Linear Combinations ◽  
First Order ◽  
Individual Type ◽  
Magnetic Nanowire ◽  
Data Points ◽  
Reversal Field ◽  
The Individual ◽  
Contact Free

Abstract Magnetic nanoparticles have been proposed as contact-free minimal-background nanobarcodes, and yet it has been difficult to rapidly and reliably decode them in an assembly. Here, high aspect ratio nanoparticles, or magnetic nanowires (MNWs), are characterized using first-order reversal curves (FORC) to investigate quantitative decoding. We have synthesized four types of nanowires (differing in diameter) that might be used for barcoding, and identified four possible “signature” functions that might be used to quickly distinguish them. To test this, we have measured the signatures of several combination samples containing two or four different MNW types, and fit them to linear combinations of the individual type signatures to determine the volume ratios of the types. We find that the signature which determines the ratios most accurately involves only the slope of each FORC at its reversal field, which requires only 2–4 data points per FORC curve, reducing the measurement time by a factor of 10 to 50 compared to measuring the full FORC.

Development of Wire Suspended Robot System (ARANEUS 2.0) for Bridge Inspection

10.29007/zw9k ◽  
2020 ◽  
Author(s):  
Kazuhide Nakata ◽  
Kazuki Umemoto ◽  
Kenji Kaneko ◽  
Ryusuke Fujisawa
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Concrete Surface ◽  
Wire Length ◽  
High Definition ◽  
Bridge Inspection ◽  
Robot System ◽  
Inspection Method ◽  
Aerial Vehicle ◽  
The Wire

This study addresses the development of a robot for inspection of old bridges. By suspending the robot with a wire and controlling the wire length, the movement of the robot is realized. The robot mounts a high-definition camera and aims to detect cracks on the concrete surface of the bridge using this camera. An inspection method using an unmanned aerial vehicle (UAV) has been proposed. Compared to the method using an unmanned aerial vehicle, the wire suspended robot system has the advantage of insensitivity to wind and ability to carry heavy equipments, this makes it possible to install a high-definition camera and a cleaning function to find cracks that are difficult to detect due to dirt.

Factors influencing the individual effects of blood transfusions on oxygen delivery and oxygen consumption*

2001 ◽  
Vol 29 (Supplement) ◽  
pp. S173-S179 ◽  
Author(s):  
Mattias Casutt ◽  
Burkhardt Seifert ◽  
Thomas Pasch ◽  
Edith R. Schmid ◽  
Marko I. Turina ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Oxygen Delivery ◽  
Blood Transfusions ◽  
Factors Influencing ◽  
Individual Effects ◽  
The Individual

First order reversal curve investigation of the hard and soft magnetic phases of annealed CoFeCu nanowire arrays

2013 ◽  
Vol 429 ◽  
pp. 46-51 ◽  
Author(s):  
M. Almasi-Kashi ◽  
A. Ramazani ◽  
E. Golafshan ◽  
M. Arefpour ◽  
E. Jafari-Khamse
Keyword(s):  
Nanowire Arrays ◽  
Soft Magnetic ◽  
Magnetic Phases ◽  
First Order

scholarly journals Decentralised sweetpotato (Ipomoea batatas) vine multiplication in Lake Zone, Tanzania: Five years later

2020 ◽  
Vol 5 (1) ◽  
pp. 677-689
Author(s):  
Margaret A. McEwan ◽  
Conny J. M. Almekinders ◽  
Moses S. Matui ◽  
Dorothy Lusheshanija ◽  
Mariana Massawe ◽  
...  
Keyword(s):  
Group Dynamics ◽  
Ipomoea Batatas ◽  
Water Access ◽  
Qualitative And Quantitative ◽  
Factors Influencing ◽  
Lake Zone ◽  
Norms And Values ◽  
Group Members ◽  
Market Factors ◽  
The Individual

AbstractFarmer-based seed multiplication is widely promoted by development practitioners, but there is limited understanding of the individual or collective motivations of farmers to engage or disengage in specialised seed production. The objective of this study is to understand the factors influencing the continuity of sweetpotato vine multiplication enterprises in the Lake Zone of Tanzania, five years after support from a project ended. A total of 81 out of 88 trained group or individual decentralised vine multipliers (DVMs) were traced to assess their vine multiplication activities. Qualitative and quantitative data were collected through telephone and field interviews. Our data showed that 40% of the 81 DVMs had sold vines in the year prior to the study and 20% had maintained the improved varieties for their own use. Some group members had continued vine sales as individuals. The DVMs’ reasons for abandoning vine multiplication included climatic and water access issues, market factors and group dynamics. The DVMs did not engage in high volumes of commercial sales. Socio-economic norms and values underpin the transactions of sweetpotato vines. These norms may undermine the emergence of commercially viable enterprises yet seem navigable for a substantial number of the DVMs. Group DVMs seem less commercially successful than individuals.

Critical examination of various approaches used for analysing helical cables

1994 ◽  
Vol 29 (1) ◽  
pp. 43-55 ◽  
Author(s):  
M Raoof ◽  
I Kraincanic
Keyword(s):  
Large Diameter ◽  
Numerical Results ◽  
Hertzian Contact ◽  
Critical Examination ◽  
First Order ◽  
Wide Range ◽  
End Conditions ◽  
Parametric Studies ◽  
The Individual ◽  
Fixed End

Using theoretical parametric studies covering a wide range of cable (and wire) diameters and lay angles, the range of validity of various approaches used for analysing helical cables are critically examined. Numerical results strongly suggest that for multi-layered steel strands with small wire/cable diameter ratios, the bending and torsional stiffnesses of the individual wires may safely be ignored when calculating the 2 × 2 matrix for strand axial/torsional stiffnesses. However, such bending and torsional wire stiffnesses are shown to be first order parameters in analysing the overall axial and torsional stiffnesses of, say, seven wire stands, especially under free-fixed end conditions with respect to torsional movements. Interwire contact deformations are shown to be of great importance in evaluating the axial and torsional stiffnesses of large diameter multi-layered steel strands. Their importance diminishes as the number of wires associated with smaller diameter cables decreases. Using a modified version of a previously reported theoretical model for analysing multilayered instrumentation cables, the importance of allowing for the influence of contact deformations in compliant layers on cable overall characteristics such as axial or torsional stiffnesses is demonstrated by theoretical numerical results. In particular, non-Hertzian contact formulations are used to obtain the interlayer compliances in instrumentation cables in preference to a previously reported model employing Hertzian theory with its associated limitations.

Sign in / Sign up

Export Citation Format

Share Document