The paper is concerned with the boundary controllability of entropy weak solutions to hyperbolic systems of conservation laws. We prove a general result on the asymptotic stabilization of a system near a constant state. On the other hand, we give an example showing that exact controllability in finite time cannot be achieved, in general.

By using concrete scenarios, we present and discuss a new concept of probabilistic Self-Stabilization in Distributed Systems.

Dijkstra’s concept of self-stabilization assumes that faults can only affect the variables of a program. We study the notion of self-stabilization if faults can also affect (i.e., augment) the program code of a system. A code stabilizing system automatically recovers from (almost) arbitrary perturbations of its program code. We prove some lower bounds for code stabilizing systems and argue that...

✔ Spinal fractures are frequently located at the thoracolumbar junction for biomechanical reasons ✔ The AO classification has gained widespread acceptance in Europe for the grading of thoracolumbar fractures: Type A: vertebral compression fractures; Type B: anterior and posterior column injuries with distraction; Type C: anterior and posterior element injury with rotation ✔ The initial focus of...

Comparative study conducted on eighty dentate mandibular fracture patients at maxillofacial unit of de,Montmorency College of Dentistry / Punjab Dental Hospital Lahore, treated by open reduction and internal Fixation (ORIF) by mini plates and screws in two Groups. Group-A, treated by two plate fixation and Group-B, treated by one plate fixation with tension banding by an archbar in place of sec...

This study compared the results of external fixation combined with limited open reduction and internal fixation (EF + LORIF), minimally invasive percutaneous plate osteosynthesis (MIPPO), and intramedullary nailing (IMN) for distal tibia fractures. A total of 84 patients with distal tibia shaft fractures were randomized to operative stabilization using EF + LORIF (28 cases), MIPPO (28 cases), o...

BACKGROUND The placement of iliac screws is a biomechanically sound method for the stabilization of long multi-segment lumbar constructs. Traditional techniques for the placement of iliac screws often involve either substantial iliac muscle dissection for visualization of screw trajectory based on bony landmarks, or alternatively the use of intra-operative imaging to visualize these landmarks a...