Enhanced flow in smooth single-file channel

2007 ◽  
Vol 127 (5) ◽  
pp. 054706 ◽  
Author(s):  
Shashwati Roy Majumder ◽  
Niharendu Choudhury ◽  
Swapan K. Ghosh
Keyword(s):  
Single File

scholarly journals Single-file and normal diffusion of magnetic colloids in modulated channels

2014 ◽  
Vol 89 (3) ◽  
Author(s):  
D. Lucena ◽  
J. E. Galván-Moya ◽  
W. P. Ferreira ◽  
F. M. Peeters
Keyword(s):  
Single File ◽  
Normal Diffusion ◽  
Magnetic Colloids

scholarly journals Single-File Water Flux Through Two-Dimensional Nanoporous Membranes

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Myung Eun Suk
Keyword(s):  
Water Flux ◽  
Interaction Strength ◽  
High Water ◽  
Potential Of Mean Force ◽  
Proximal Region ◽  
Dominant Factor ◽  
Chemical Characteristics ◽  
Nanoporous Membranes ◽  
Two Dimensional ◽  
Single File

Abstract Recent advances in the development of two-dimensional (2D) materials have facilitated a wide variety of surface chemical characteristics obtained by composing atomic species, pore functionalization, etc. The present study focused on how chemical characteristics such as hydrophilicity affects the water transport rate in hexagonal 2D membranes. The membrane–water interaction strength was tuned to change the hydrophilicity, and the sub-nanometer pore was used to investigate single-file flux, which is known to retain excellent salt rejection. Due to the dewetting behavior of the hydrophobic pore, the water flux was zero or nominal below the threshold interaction strength. Above the threshold interaction strength, water flux decreased with an increase in interaction strength. From the potential of mean force analysis and diffusion coefficient calculations, the proximal region of the pore entrance was found to be the dominant factor degrading water flux at the highly hydrophilic pore. Furthermore, the superiority of 2D membranes over 3D membranes appeared to depend on the interaction strength. The present findings will have implications in the design of 2D membranes to retain a high water filtration rate.

Influence of surrounding temperature and angle of file access on cyclic fatigue resistance of two single file nickel‐titanium instruments

2020 ◽  
Author(s):  
Giusy Rita Maria La Rosa ◽  
Carlotta Palermo ◽  
Sebastiano Ferlito ◽  
Gaetano Isola ◽  
Francesco Indelicato ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
File Access ◽  
Single File

scholarly journals Cache-Aided General Linear Function Retrieval

Entropy ◽  
2020 ◽  
Vol 23 (1) ◽  
pp. 25
Author(s):  
Kai Wan ◽  
Hua Sun ◽  
Mingyue Ji ◽  
Daniela Tuninetti ◽  
Giuseppe Caire
Keyword(s):  
Linear Function ◽  
Linear Functions ◽  
General Linear ◽  
Linear Combinations ◽  
Past Work ◽  
Single File ◽  
Caching Scheme ◽  
Retrieval Scheme ◽  
Data Points ◽  
Coded Caching

Coded Caching, proposed by Maddah-Ali and Niesen (MAN), has the potential to reduce network traffic by pre-storing content in the users’ local memories when the network is underutilized and transmitting coded multicast messages that simultaneously benefit many users at once during peak-hour times. This paper considers the linear function retrieval version of the original coded caching setting, where users are interested in retrieving a number of linear combinations of the data points stored at the server, as opposed to a single file. This extends the scope of the authors’ past work that only considered the class of linear functions that operate element-wise over the files. On observing that the existing cache-aided scalar linear function retrieval scheme does not work in the proposed setting, this paper designs a novel coded caching scheme that outperforms uncoded caching schemes that either use unicast transmissions or let each user recover all files in the library.

Structural organization and cohesiveness of foraging groups in Camponotus sericeus (Fabricius) (Hymenoptera: Formicidae): locally regulated or self-organized?

BMC Zoology ◽  
2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Panayanthatta Ashwathi ◽  
Barman Puspita ◽  
K. N. Ganeshaiah
Keyword(s):  
Small Groups ◽  
Structural Organization ◽  
Middle Part ◽  
Entire Group ◽  
Chaotic Search ◽  
Self Organized ◽  
Single File ◽  
Tail Part ◽  
Tactile Communication ◽  
Group B

Abstract Background In Camponotus sericeus (Fabricius), foraging ants are recruited mostly as individuals but occasionally as small groups that move in a single file. We studied the structure and organization of these small foraging groups and attempted to understand the process through which the cohesiveness of the moving file is maintained. Results The recruited group moves in a single file as if steered by a leader at the moving tip. Ants in the group were found to exhibit certain fidelity to their respective positions in the file, despite the occasional breakdown of the cohesiveness due to disturbance and or obstructions on their path. This fidelity decreases from both ends towards the middle part of the file. Accordingly, three segments could be recognized in the moving file: (a) the leading ant that almost always maintains its position and steers the group, (b) a short tail part with a few ants that always trail the file and, (c) the mid part that binds the group; ants in this segment always tend to follow the leader through a cascading chain of tactile communication. If the leader ant is removed, entire group loses its orientation and enters into a chaotic search state. But removing any other ant does not affect the cohesiveness; rather it’s position is occupied by the member preceding it and thus maintains the link in the group. Conclusions The cohesiveness of the moving group appeared to result from (a) regulation of the movement of the group by the leading ant, and, (b) an interactive process among the rest of the ants. Based on these two elements, a simple automated model of the group’s movement was developed that could effectively mimic the observed pattern. We also provide evidence to suggest that recruitment of groups occurs in the direction of, and in response to, the information received by the colony on, the resource rich patches.

Toward Observation of Single-File Diffusion Using the Tracer Zero-Length Column Method

2008 ◽  
Vol 112 (12) ◽  
pp. 3821-3825 ◽  
Author(s):  
Abduljelil Iliyas ◽  
Mladen Eić ◽  
M. Hassan Zahedi-Niaki ◽  
Sergey Vasenkov
Keyword(s):  
Single File ◽  
Column Method ◽  
Single File Diffusion

scholarly journals Propagation Dynamics of a Particle Phase in a Single-File Pore.

2000 ◽  
Vol 651 ◽  
Author(s):  
A.M. Lacasta ◽  
J.M. Sancho ◽  
F. Sagues ◽  
G. Oshanin
Keyword(s):  
Liquid Phase ◽  
Total Mass ◽  
Bulk Liquid ◽  
Particle Interactions ◽  
Particle Phase ◽  
Dynamic Density ◽  
Single File ◽  
Propagation Dynamics

AbstractWe study propagation dynamics of a particle phase in a single-file pore connected to a reservoir of particles (bulk liquid phase). We show that the total mass M(t) of particles entering the pore up to time t grows as (Mt) = 2m(J,ρF) √D0t, where D0 is the “bare” di usion coeffcient and the prefactor m(J,ρF) is a non-trivial function of the reservoir density ρF and the amplitude J of attractive particle-particle interactions. Behavior of the dynamic density pro les is also discussed.

Sign in / Sign up

Export Citation Format

Share Document