Equations are established for the deformation of a viscoelastic porous solid containing a viscous fluid under the most general assumptions of anisotropy. The particular cases of transverse and complete isotropy are discussed. General solutions are also developed for the equations in the isotropic case. As an example the problem of the settlement of a loaded column is treated. The second-order e...

The use of web sites in University schools around the world has become more important than ever. Functionality has grown beyond simple presence on the web: students use them to check course schedules, enrollment, payment and several other administrative and learning activities. Because of this reason, the interaction and communication between these web sites and its users must be pleasant, usef...

A proxy re-encryption system allows the proxy to transform ciphertexts encrypted under Alice’s public key into the different ciphertexts that can be decrypted by Bob’s secret key. In this paper, we propose new proxy re-encryption systems; one for the transformation from ciphertexts encrypted under a traditional certificate-based public key into the ciphertexts that can be decrypted by an secret...

This paper studies the pickup and delivery traveling salesman problem with multiple stacks. The vehicle contains a number of (horizontal) stacks of finite capacity for loading items from the rear of the vehicle. Each stack must satisfy the last-in-first-out constraint which states that any new item must be loaded on top of a stack and any unloaded item must be on top of its stack. A branch-and-...

• Assume there is a network of parallel lines from an origin to a destination as shown in figure 2.1. Several agents want to send a particular amount of traffic along a path from the source to the destination. The more traffic on a particular line, the longer the traffic delay. • Allocation jobs to machines as shown in figure 2.2. Each job has a different size and each machine has a different s...

The Traditional data warehouse did not contain data as today. Hence, it is difficult to retrieve these data and treat them. Furthermore, its content is not updated, which may lead to bad decisions. Data are typically loaded from conventional operational systems. Given that today’s decisions, in the business world, are becoming more and more in real time. Thus, the system supporting these decisi...