Alginate is an attractive material for controlled drug delivery and cell transplantation applications. However, alginate hydrogels are not degradable, have limited mechanical properties, and lack the functional groups required for cell interaction. To address these limitations of alginate while maintaining their favorable characteristics, we have synthesized new polymers derived from sodium poly(guluronate), the portion of the alginate molecule that is responsible for its gelling behaviour. Sodium poly(guluronate) was isolated, oxidized with sodium periodate, and cross-linked with adipic dihydrazide to yield hydrogels with a wide range of mechanical properties, and with cell adhesion peptides coupled to their backbones.
Scheduling with learning effects has been receiving increasing attention in recent years. However, most researchers assumed that there is a common goal of minimization for all the jobs. In many applications and Asian Fit Oakley Coffee Lens Brown Frame
methodological fields, it is known that multiple agents pursuing different objectives compete for the usage of a common processing resource. In this paper, we studied a single-machine problem with learning effects, where the objective is to minimize the total weighted completion time of jobs from the first agent, given that the number of tardy jobs of the second agent is zero. We proposed a branch-and-bound algorithm and Asian Fit Oakley Gray Lens Gray Frame
four heuristic algorithms to search for the optimal solution and near-optimal solutions, respectively.