Maintaining trust in cloud computing through SLA monitoring

© Springer International Publishing Switzerland 2014. Maintaining trust in cloud computing is a significant challenge due to the dynamic nature of cloud computing and the fragility of trust. Trust can be established by conducting successful transactions and meeting all the parameters of the Service Level Agreement (SLA) drawn up between two interacting parties. Trust can be maintained by continuous monitoring of these predefined SLA parameters. There are number of commentaries on SLA monitoring that describe different frameworks for the proactive or reactive detection of SLA violations. The aim of this research is to present an overview of the literature and make a comparative analysis of SLA monitoring in respect of trust maintenance in cloud computing

Prevalence of Low Back Pain and Associated Risk Factors among Saudi Arabian Adolescents: A Cross-Sectional Study

Low back pain is the most prevalent musculoskeletal condition. Studies on adolescent low back pain are scarce, with no research to determine its prevalence in Saudi Arabia. This study aimed to assess the prevalence and associated risk factors of low back pain in Saudi Arabian adolescents. This cross-sectional study was conducted among Saudi Arabian high school students, which included demographic data, medical and low back pain history. The completed survey by 2000 participants showcased 57.9% of students experiencing low back pain in the last 12 months. This included 31.2% men and 26.7% women. This study found a link between low back pain and age, clinical symptoms of diabetes, heart disease, lung disease, thyroid disease, arthritis, and back surgery, a family history of low back pain, as well as smoking. There is substantial prevalence of low back pain in Saudi Arabian adolescents. This study identified several modifiable and non-modifiable risk factors stemming from adolescent low back pain

Structural characteristics and high-temperature oxidation behavior of porous Fe-40 at.%Al alloy

Porous FeAl alloy was prepared by Fe and Al elemental reaction synthesis. The cyclic oxidation evolutions of porous Fe-40 at.%Al alloy at the elevated temperatures of 600 and 800 A degrees C in air were studied and compared to porous materials of Ti, Ni, and 316L stainless steel. It has been shown that the oxidation of porous Fe-40 at.%Al alloy fitted a power law and no spallation was found after cyclic oxidation for 202 h in air. The porous FeAl alloy exhibits much better oxidation resistance than other porous materials, such as Ti, Ni, and 316L stainless steel, indicating that the porous Fe-40 at.%Al alloy has the highest structural stability at the elevated temperature in the oxidation atmosphere. Thus, the porous FeAl alloy can be used as filtering materials at elevated temperature in the oxidation atmosphere