Military Academy

About: Military Academy is a based out in . It is known for research contribution in the topics: Population & Fuzzy logic. The organization has 2478 authors who have published 3003 publications receiving 33188 citations.

Micelle and Surface Tension of Double-Chain Cationic Surfactants.

Abstract: Since the early 20th century, the slightly disparate measurements of a surfactant’s critical micelle concentration, via either surface tension or electrical conductivity, have been assumed one and the same As a consequence, the possibility that micelles can adsorb at the air/water surface has been disregarded and has led to some abnormalities in the literature that remain as yet unresolved In this paper, we closely examined the two critical concentrations for a double-chain cationic surfactant We confirmed that the two concentrations represent two different physical phenomena Furthermore, the results verified the existence of surface micelles, which are different from the bulk micelles The formation of the surface micelles can be explained by the structural changes of the adsorption layer, which was also corroborated by molecular simulations The findings open new challenges to examine the surface adsorption, which offers new insights into the molecular levels

A new algorithm for site-dependent vehicle routing problem

Abstract: In the site-dependent vehicle routing problem (SDVRP), a heterogeneous fleet of vehicles is used to service a set of customers, but there exist compatibility dependencies between customer sites and vehicle types. Some customers with extremely large demands may require large vehicles, whereas some customers located in congested areas may require small or medium-size vehicles. Other customers might be serviced by any type of vehicle. The goal is to carefully select an allowable vehicle type for each customer. Then, for each vehicle type, a classical vehicle routing problem (VRP) is solved over all customers selecting that vehicle type so that the total distance traveled by the entire fleet is minimized and all VRP constraints as well as the site-dependent constraints are satisfied. In this paper, a new algorithm for solving the SDVRP is presented and applied to a set of 12 test problems taken from the literature. The computational results show that the new algorithm easily outperforms the previous methods.