scholarly journals Stability of Bar Code Information Stored in Magnetic Nanowire Arrays

2017 ◽  
Vol 2017 ◽  
pp. 1-8
Author(s):  
Eduardo Cisternas ◽  
Eugenio E. Vogel ◽  
Julián Faúndez
Keyword(s):  
Magnetic Material ◽  
Triangular Lattice ◽  
Porous Alumina ◽  
Nanowire Arrays ◽  
Bar Code ◽  
Bar Codes ◽  
Repulsive Energy ◽  
Magnetic Nanowire ◽  
Magnetization Orientation ◽  
Stored Information

Firmware applications such as security codes, magnetic keys, and similar products can be stored in magnetic bar codes similar to optical bar codes. This can be achieved on the triangular lattice present in porous alumina, whose pori can be filled by magnetic material, over which magnetic bar codes can be inscribed. We study the conditions to improve the durability of the stored information by minimizing the repulsive energy among wires with parallel magnetization within the same bar but interacting with attractive energy with wires in the neighboring bar. The following parameters are varied to minimize the energy of the system: relative amount of magnetization orientation within the bar code area in any orientation, width of the bars, and distribution of wider bars to the outside or to the inside of the code. It is found that durability of the code is favored for equal amount of magnetization in each direction, abundance of narrow bars trying to locate a few wider ones towards the center. Three real commercial optical bar codes taken at random were mapped into magnetic bar codes; it is found that the corresponding magnetic energies are similar to those analyzed here which provides a realistic test for this approach.

Self-assembled magnetic nanowire arrays

2007 ◽  
Vol 90 (10) ◽  
pp. 103105 ◽  
Author(s):  
Ming Liu ◽  
Jalal Lagdani ◽  
Hassan Imrane ◽  
Carl Pettiford ◽  
Jing Lou ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Self Assembled

Self-assembled magnetic nanowire arrays

2006 ◽  
Author(s):  
J. Lagdani ◽  
H. Imrane ◽  
C. Pettiford ◽  
J. Lou ◽  
S. D. Yoon ◽  
...  
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Nanowire ◽  
Self Assembled

scholarly journals Porous alumina membranes with branched nanopores as templates for fabrication of Y-shaped nanowire arrays

2012 ◽  
Vol 16 (11) ◽  
pp. 3611-3619 ◽  
Author(s):  
Leszek Zaraska ◽  
Elżbieta Kurowska ◽  
Grzegorz D. Sulka ◽  
Marian Jaskuła
Keyword(s):  
Porous Alumina ◽  
Nanowire Arrays ◽  
Alumina Membranes

Optical Properties of Cu-Co Alloy Nanowire Arrays in Porous Alumina Template

2009 ◽  
Vol 29 (1) ◽  
pp. 277-280 ◽  
Author(s):  
郑萌萌 Zheng Mengmeng ◽  
吴福全 Wu Fuquan ◽  
刘在国 Liu Zaiguo ◽  
张立春 Zhang Lichun ◽  
李清山 Li Qingshan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Porous Alumina ◽  
Nanowire Arrays ◽  
Alumina Template ◽  
Porous Alumina Template

scholarly journals Patient Misidentifications Caused by Errors in Standard Bar Code Technology

2010 ◽  
Vol 56 (10) ◽  
pp. 1554-1560 ◽  
Author(s):  
Marion L Snyder ◽  
Alexis Carter ◽  
Karen Jenkins ◽  
Corinne R Fantz
Keyword(s):  
Point Of Care ◽  
Data Integrity ◽  
Medication Administration ◽  
Error Rates ◽  
Healthcare Applications ◽  
Worst Case ◽  
Bar Code ◽  
Bar Codes ◽  
Glucose Testing ◽  
Code Identification

BACKGROUND Bar code technology has decreased transcription errors in many healthcare applications. However, we have found that linear bar code identification methods are not failsafe. In this study, we sought to identify the sources of bar code decoding errors that generated incorrect patient identifiers when bar codes were scanned for point-of-care glucose testing and to develop solutions to prevent their occurrence. METHODS We identified misread wristband bar codes, removed them from service, and rescanned them by using 5 different scanner models. Bar codes were reprinted in pristine condition for use as controls. We determined error rates for each bar code–scanner pair and manually calculated internal bar code data integrity checks. RESULTS As many as 3 incorrect patient identifiers were generated from a single bar code. Minor bar code imperfections, failure to control for bar code scanner resolution requirements, and less than optimal printed bar code orientation were confirmed as sources of these errors. Of the scanner models tested, the Roche ACCU-CHEK® glucometer had the highest error rate. The internal data integrity check system did not detect these errors. CONCLUSIONS Bar code–related patient misidentifications can occur. In the worst case, misidentified patient results could have been transmitted to the incorrect patient medical record. This report has profound implications not only for point-of-care testing but also for bar coded medication administration, transfusion recipient certification systems, and other areas where patient misidentifications can be life-threatening. Careful control of bar code scanning and printing equipment specifications will minimize this threat to patient safety. Ultimately, healthcare device manufacturers should adopt more robust and higher fidelity alternatives to linear bar code symbologies.

SYNTHESIS OF COBALT NANOTUBULES AND CHARACTERIZATION OF MAGNETIZATION DYNAMICS

2011 ◽  
Vol 10 (04n05) ◽  
pp. 641-646 ◽  
Author(s):  
SACHIN PATHAK ◽  
SUKHVINDER SINGH ◽  
MANISH SHARMA
Keyword(s):  
Nanowire Arrays ◽  
Magnetic Recording Media ◽  
Magnetization Dynamics ◽  
Cobalt Nanowires ◽  
Micromagnetic Modeling ◽  
Magnetic Nanowire ◽  
High Density Magnetic Recording ◽  
Poly Carbonate ◽  
Unique Capability

Magnetic nanowire arrays formed by templated electrodeposition are a promising way of making ultra-high density magnetic recording media. We have used both Poly Carbonate Track Etched (PCTE) and Anodic Aluminum Oxide (AAO) membranes to obtain Cobalt nanowires. Also by suitably adjusting the electrodeposition process, hollow Cobalt nanotubules were formed. The hollow cylindrical structure gives a unique capability to tailor their magnetization. The morphology of the samples was investigated using SEM and TEM. Magnetic characterization done using SQUID shows the influence of morphology and that the nanotubules have rather different switching behaviour than solid nanowires. Finite element micromagnetic modeling was performed of a single nanowire, a single nanotubule and also arrays of nanotubules. The calculated static M-H curves were found to match closely the SQUID measurements. The coercivity increases with length while the inner and outer diameters greatly affect rotational switching of the magnetization.

scholarly journals Fabrication of Microwave Devices Based on Magnetic Nanowires Using a Laser-Assisted Process

Micromachines ◽  
2019 ◽  
Vol 10 (7) ◽  
pp. 475 ◽  
Author(s):  
Vivien Van Kerckhoven ◽  
Luc Piraux ◽  
Isabelle Huynen
Keyword(s):  
Magnetic Field ◽  
Porous Alumina ◽  
Nanowire Arrays ◽  
Microwave Devices ◽  
Substrate Integrated Waveguide ◽  
Magnetic Nanowires ◽  
Ferromagnetic Nanowires ◽  
Dc Magnetic Field ◽  
Pros And Cons ◽  
Lithography Technique

This paper compares two laser-assisted processes developed by the authors for the fabrication of microwave devices based on nanowire arrays loaded inside porous alumina templates. Pros and cons of each process are discussed in terms of accuracy, reproducibility and ease of fabrication. A comparison with lithography technique is also provided. The efficiency of the laser-assisted process is demonstrated through the realization of substrate integrated waveguide (SIW) based devices. A Nanowired SIW line is firstly presented. It operates between 8.5 and 17 GHz, corresponding to the first and second cut-off frequency of the waveguide, respectively. Next, a Nanowired SIW isolator is demonstrated. It shows a nonreciprocal isolation of 12 dB (corresponding to 4.4 dB/cm), observed in absence of a DC magnetic field, and achieved through an adequate positioning of ferromagnetic nanowires inside the waveguide cavity.

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