introduction: intense pulsed light (ipl) has long been used for skin rejuvenation. photo rejuvenation with red light (with or without photo sensitizer) is a newer noninvasive way for this purpose; but, until now few comparative studies between these modalities have been performed . the aim of this study was to compare efficacy, adverse effects, and compliance of intense pulsed light rejuvenatio...

As one of core technologies of software rejuvenation, analytical models provide a decision-making basis for implementing rejuvenation. This paper builds analytic models using stochastic reward nets with three different rejuvenation policies: non-rejuvenation, time-based rejuvenation, and time and load-based delay rejuvenation, and presents how system transits from one state into another. The re...

This paper develops time-based rejuvenation policies to improve the performability measures of a cluster system. Three rejuvenation policies, namely standard rejuvenation, delayed rejuvenation and mixed rejuvenation, are designed to improve the cluster’s performability under varying workload. Analytic models are built to evaluate these three policies. Since deterministic transitions are used in...

It is well-known that the harsh operational conditions of turbine blades lead to a gradual change in the microstructure of underlying Ni-based superalloy of blades. According to this, a rejuvenation process should be conducted on turbine blades superalloys to recover their microstructures. The first and main step of rejuvenation process is the determination of appropriate solution condition in ...

Submitted for the MAR14 Meeting of The American Physical Society Atomistic study of rejuvenation of amorphous metals via thermal loading MASATO WAKEDA, Osaka University, JUNJI SAIDA, Tohoku University, JU LI, Massachusetts Institute of Technology, SHIGENOBU OGATA, Osaka University — Rejuvenation is the structural excitation of amorphous system accompanied by enthalpy and free volume rise, and i...

In this paper we present a comparative experimental study of the main software rejuvenation techniques developed so far to mitigate the software aging effects. We consider six different rejuvenation techniques with different levels of granularity: (i) physical node reboot, (ii) virtual machine reboot, (iii) OS reboot, (iv) fast OS reboot, (v) standalone application restart, and (vi) application...

A two-level rejuvenation policy for software systems with degradation process is studied. Both full restarts and partial restarts are considered in this rejuvenation strategy. A semi-Markov process model is constructed, and based on its closed-form solution we obtain the system availability as a bivariate function. Then, the rejuvenation policy is analyzed to maximize the system availability. S...

Software aging and rejuvenation research has shown that the application of approaches for software aging modeling, monitoring, and rejuvenation has the potential to significantly increase software resilience. In this chapter, we present an overview of important analytical models and measurement approaches for software aging and rejuvenation. We start by describing the Markov based approaches an...

Software rejuvenation has been addressed in hundreds of papers since it was proposed in 1995 by Huang et al. The growing number of research papers shows the great importance of this topic. However, no paper has studied yet software rejuvenation in the real world. This paper investigates to what extent software rejuvenation techniques are integrated in the IT and Telco solutions. For this purpos...

The author uses combination volume rejuvenation therapy (CVRT) in patients who desire facial rejuvenation with minimal downtime. He describes how the combined use of relatively large doses of multiple injectables-including fat, pharmaceutical soft tissue fillers, and Botox-permits simultaneous volume rejuvenation of most facial areas with or without excisional surgery.