In recent years there has been a breakthrough in non-invasive techniques of facial rejuvenation. The greater understanding of the anatomical changes involved in the aging process was accompanied by rapid evolution in how to address these changes and the expansion of substances and technologies used in this approach. Of the arsenal of substances used for rejuvenation, the upper third of the face...

T o cast this sage historical advice into contemporary terms, the eternal human predisposition to believe in flimsy promises of rejuvenation needs to be well understood, or repeated. As an ingenious species, we have made grand advances in overcoming the physical limits of our biology. Yet while technology has overcome our native ponderous, gravityand land-bound locomotion with air, land and sea...

Mobile communication devices have multitasking embedded software running in their operating systems (OS) as well as applications. Both the OS modules and the application components are assigned predetermined memory in those devices due to their near-realtime performance requirements. Memory (stack and heap) overflow problems occur in such software components because of programmer’s inability to...

In this paper we investigate the effect of three time-triggered system rejuvenation policies on service availability using a queuing model. The model is formulated as an extended stochastic Petri net using a variety of distributions for times between state changes. We define a metric for steady-state service availability and derive how it can be estimated from the models. We further analyze tim...

Software systems are known to suffer from outages due to transient errors. Recently, the phenomenon of “software aging”, one in which the state of the software system degrades with time, has been reported. To counteract this phenomenon,a proactive approach of fault management, called “software rejuvenation”, has been proposed. This essentially involves gracefully terminating an application or a...

Rejuvenation is the configurational excitation of amorphous materials and is one of the more promising approaches for improving the deformability of amorphous metals that usually exhibit macroscopic brittle fracture modes. Here, we propose a method to control the level of rejuvenation through systematic thermal processing and clarify the crucial feasibility conditions by means of molecular dyna...

The main idea behind the increase in use of real time systems is that their performance is measured in terms of clock time and not on the basis of logical time which imposes timing constraints on the performance evaluation of such systems. It is a fact that any software with aging becomes prone to failure. Mostly the complex systems are safety critical systems whose reliability is the most impo...

Cluster systems, using commercially available personal computers connected in a loosely coupled fashion can provide high levels of availability. To improve the availability of personal computer-based Active/Standby cluster systems, we have conducted a study of software rejuvenation that follows a proactive fault-tolerant approach to handle software-origin system failure. In this paper, we map s...

Electrical impedance spectroscopy (EIS) and cyclic voltammetry (CV) measure properties of the electrode-tissue interface without additional invasive procedures, and can be used to monitor electrode performance over the long term. EIS measures electrical impedance at multiple frequencies, and increases in impedance indicate increased glial scar formation around the device, while cyclic voltamme...

In a client-server type system, the server software is required t o run continuously for very long periods. Due to repeated and potentially faulty usage b y many clients, such software “ages” with time and eventually fails. Huang et. al. proposed a technique called %oftware rejuvenation” [9] in which the software i s periodically stopped and then restarted in a “robust” state a f ter proper mai...