scholarly journals Collective Dynamics in Quasi-One-Dimensional Hard Disk System

2021 ◽  
Vol 9 ◽  
Author(s):  
Adrián Huerta ◽  
Taras Bryk ◽  
Victor M. Pergamenshchik ◽  
Andrij Trokhymchuk
Keyword(s):  
Hard Disk ◽  
Close Packing ◽  
Collective Excitations ◽  
Hard Disks ◽  
Disk System ◽  
Disk Diameter ◽  
One Dimensional ◽  
Collective Dynamics ◽  
Transverse Modes ◽  
2D Arrays

We present the results of molecular dynamic studies of collective dynamics in a system of hard disks confined to a narrow quasi-one-dimensional (quasi-1D) channel. The computer simulations have been performed for the specific channel width of 3/2 of disk diameter in which the disk arrangement at close packing resembles zigzag ordering characteristic of a vertically oriented two-dimensional (2D) triangular lattice. In such a quasi-1D system, which is intermediate between 1D and 2D arrays of hard disks, the transverse excitations obey very specific dispersion law typical of the usual optical transverse modes. This is in a sharp contrast both to the 1D case, where transverse excitations are not possible, and to the 2D case, where the regular shear waves with a propagation gap were observed. Other peculiarities of the dispersion of collective excitations as well as some results of disk structuring and thermodynamics of the quasi-1D hard disk system are presented and discussed for a range of hard disk densities typical for fluid and distorted crystal states.

scholarly journals Kosterlitz-Thouless-type caging-uncaging transition in a quasi-one-dimensional hard disk system

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
A. Huerta ◽  
T. Bryk ◽  
V. M. Pergamenshchik ◽  
A. Trokhymchuk
Keyword(s):  
Hard Disk ◽  
Disk System ◽  
One Dimensional

scholarly journals Assessing the role of static length scales behind glassy dynamics in polydisperse hard disks

2015 ◽  
Vol 112 (22) ◽  
pp. 6920-6924 ◽  
Author(s):  
John Russo ◽  
Hajime Tanaka
Keyword(s):  
Correlation Length ◽  
Hard Disk ◽  
Decay Length ◽  
Hard Disks ◽  
Dynamic Heterogeneity ◽  
Disk System ◽  
Slowing Down ◽  
Static Correlation ◽  
Dynamic Length

The possible role of growing static order in the dynamical slowing down toward the glass transition has recently attracted considerable attention. On the basis of random first-order transition theory, a new method to measure the static correlation length of amorphous order, called “point-to-set” (PTS) length, has been proposed and used to show that the dynamic length grows much faster than the static length. Here, we study the nature of the PTS length, using a polydisperse hard-disk system, which is a model that is known to exhibit a growing hexatic order upon densification. We show that the PTS correlation length is decoupled from the steeper increase of the correlation length of hexatic order and dynamic heterogeneity, while closely mirroring the decay length of two-body density correlations. Our results thus provide a clear example that other forms of order can play an important role in the slowing down of the dynamics, casting a serious doubt on the order-agnostic nature of the PTS length and its relevance to slow dynamics, provided that a polydisperse hard-disk system is a typical glass former.

scholarly journals Collective excitations of trapped one-dimensional dipolar quantum gases

2008 ◽  
Vol 77 (1) ◽  
Author(s):  
P. Pedri ◽  
S. De Palo ◽  
E. Orignac ◽  
R. Citro ◽  
M. L. Chiofalo
Keyword(s):  
Quantum Gases ◽  
Collective Excitations ◽  
One Dimensional

Assessment of Current Health of Hard Disk Drives

2010 ◽  
Author(s):  
Abe Zeid ◽  
Sagar Kamarthi
Keyword(s):  
Health Management ◽  
State Of The Art ◽  
Hard Disk Drives ◽  
Health Assessment ◽  
Hard Disk ◽  
Assessment Method ◽  
Hard Disks ◽  
Disk Drives ◽  
Future Directions ◽  
Self Monitoring

Prognostics and health management of computer hard disk drives is beneficial from two different angles: it can help computer users plan for timely replacement of HDDs before they catastrophically fail and cause serious data loss; it can also help product recover facilities reuse hard disks recovered from the end-of-life computers for building refurbished computers. This paper presents a HDD health assessment method using Self-Monitoring, Analysis, and Reporting Technology (SMART) attributes. It also presents the state-of-the art results in monitoring the condition of hard disks and offers future directions for distributed hard disk monitoring.

scholarly journals Research on Fractal Characterization of Data Transmission Performance of Hard Disk

2018 ◽  
Vol 173 ◽  
pp. 03035
Author(s):  
Wei Jiang ◽  
Cuicui Ji ◽  
Yuntian Dai
Keyword(s):  
Fractal Dimension ◽  
Data Transmission ◽  
Transfer Rate ◽  
Data Transfer ◽  
Fractal Theory ◽  
Hard Disk ◽  
Hard Disks ◽  
Transmission Performance ◽  
Rotating Speed ◽  
Solid State Disks

The data transfer rate is the traditional criterion for evaluating the overall performance of a hard disk. In this paper, the data transmission performance of hard disk was characterized based on fractal theory. The traditional mechanical hard disks and solid state disks with different capacities and specifications were tested and the corresponding signal graph of data transfer was analysed for the calculation of fractal dimension D. The results indicate that the process of hard disk data transfer has fractal characteristics; the fractal dimension D increases with the increase of the average transfer rate and the rotating speed of mechanical hard disk. However, there seems no direct correspondence between the fractal dimension D and the capacity of the hard disk; the larger the floating range of data transmission, the greater value of fractal dimension D.

Fabrications and Electron Transport Properties of One Dimensional Arrays of Gold and Sulfur Containing Fullerene Nanoparticles

2001 ◽  
Vol 704 ◽  
Author(s):  
Sheng-Ming Shih ◽  
Wei-Fang Su ◽  
Yuh-Jiuan Lin ◽  
Cen-Shawn Wu ◽  
Chii-Dong Chen
Keyword(s):  
Gold Nanoparticles ◽  
Coulomb Blockade ◽  
Fullerene Derivative ◽  
Step Method ◽  
Covalent Bonds ◽  
One Dimensional ◽  
Fullerene Nanoparticles ◽  
Electron Transport Properties ◽  
2D Arrays ◽  
Sulfur Containing

AbstractNovel arrays of gold nanoparticles with sulfur containing fullerene nanoparticles were self-assembled through the formation of Au-S covalent bonds. Disulfide functional groups were introduced into C60 molecule by reacting propyl 2-aminoethyl disulfide with C60. The two dimensional(2D) arrays were formed at the interface of aqueous phase of gold particles and organic phase of fullerene particles as a blue transparent film. TEM images showed that the fullerene spacing between adjacent Au(~10 nm) particles was about 2.1±0.4 nm, which was consistent with the result of 2.18 nm by molecular molding calculations(MM+). The arrays were deposited on the top of pairs of gold electrodes to form 2D colloidal single electron devices. The electrode pairs were made by electron beam lithography techniques, and the separation between tips of the two electrodes in a pair was less then 100 nm. Transport measurements at low temperatures exhibited Coulomb-Blockade type current-voltage characteristics, the lower the temperature the more pronounced the Coulomb gap. Also, step-by-step method was used to assemble one-dimensional(1D) array of gold nanoparticles with fullerene derivative between two electrodes spaced with 15 nm. The Coulomb blockade behavior of 1D arrays was clearer than that of 2D arrays.

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