3,143 research outputs found
Effect of a surface tension imbalance on a partly submerged cylinder
We perform a static analysis of a circular cylinder that forms a barrier
between surfactant-laden and surfactant-free portions of a liquidgas
interface. In addition to determining the general implications of the balances
for forces and torques, we quantify how the imbalance
between the uniform surface tension
of the surfactant-free portion of the interface and the uniform surface tension
of the surfactant-laden portion of the interface influences the
load-bearing capacity of a hydrophobic cylinder. Moreover, we demonstrate that
the difference between surface tensions on either side of a cylinder with a
cross-section of arbitrary shape induces a horizontal force component
equal to in magnitude, when measured per unit length of the
cylinder. With an energetic argument, we show that this relation also applies
to rod-like barriers with cross-sections of variable shape. In addition, we
apply our analysis to amphiphilic Janus cylinders and we discuss practical
implications of our findings for Marangoni propulsion and surface pressure
measurements
Improved Secure Address Resolution Protocol
In this paper, an improved secure address resolution protocol is presented
where ARP spoofing attack is prevented. The proposed methodology is a
centralised methodology for preventing ARP spoofing attack. In the proposed
model there is a central server on a network or subnet which prevents ARP
spoofing attack.Comment: 10 pages, 15 figures, paper selected in fifth international
conference of communications security and information assurance 201
- …