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Ultra-reliable and low latency communications is envisioned to enable new services and applications with high reliability, availability and low latency, e.g, factory automation, Tactile Internet. Device-to-device communication is one such mean that allows devices to experience benefits in terms of shorter communication latency. Currently most device-to-device communication in frequency-division duplex...
General reliability and availability analysis methods that can be applied to structures, systems, and components (SSCs) in nuclear power generating stations and other nuclear facilities are contained in this guide.
Single axis trackers are becoming a common means to achieve greater efficiency from solar farms. Two competing architectures include independent-rows designs and linked-rows designs. Many manufacturers contend that linked-rows design is a superior design because it has fewer components and higher reliability. However, since these systems are repairable, availability is a better measure of superior...
The need for performance has motivated the increasing adoption of solid-state drives (SSD) both in personal computers and data centers. However, the high cost per gigabyte and reduced lifetime hinder the thorough replacement of hard disk drives (HDD) with SSDs. To mitigate these issues, several architectures have been conceived based on hybrid storage systems, but performance and dependability models...
Traditional cloud stacks are designed to tolerate server or rack-level failures, that are unpredictable and uncorrelated. � Such stacks successfully deliver highly-available cloud services at global scale. The increasing criticality of cloud services to the overall world economy is causing concern about the impact of power outages, cyber-attacks, configuration errors, or other causes of datacenter...
The Internet of Things (IoT) is captivating the society because of its potential to rapidly transform businesses and people's lives. It is widely believed that IoT will also transform the industrial automation business in terms of improved productivity, less cost, flexibility, and increased revenues. Hence, there are some challenges that needs to be addressed when IoT is introduced to the industrial...
Artificial Lift systems are routinely employed in the petroleum industry in order to provide the energy needed for the fluid to be transferred from the reservoir to the surface. The ESP system is a method of artificial lift widely used in recovery, often applied in mature fields or fields with heavy oil (low API gravity), as well as high flow rate wells. The energy for ESP systems is supplied by a...
Analyses of the interactions among quality requirements (QRs) have often found that optimizing on one QR will cause serious problems with other QRs. As just one relevant example, one large project had an Integrated Product Team optimize the system for Security. In doing so, it reduced its vulnerability profile by having a single-agent key distribution system and a single copy of the data base – only...
Multiservice delivery is an important research issue in wireless sensor networks (WSNs) integrated with cloud computing, especially for heterogeneous applications which require reliable, timely and fair data delivery in adversarial environments. Therefore, both reliability requirements and delay constraints should be taken into account. Moreover, the delivery protocol should be designed to cater for...
The vision of cyber-physical systems (CPSs) considered the Internet as the future communication network for such systems. A challenge with this regard is to provide high communication reliability, especially, for CPSs applications in critical infrastructures. Examples include smart grid applications with reliability requirements between 99–99.9999% [2]. Even though the Internet is a cost effective...
The power supply of the surgical luminaires represents an important source of risk for the patient's safety. The performance indicator for this system is availability. Considering the dedicated standards, there has been proposed a structure for the power supply system of a H-Surgical LED luminaire for which it is evaluated the availability, respectively the unavailability. It's presented a method...
The paper describes a new methodology that allows to design scalable complex control and data acquisition systems taking into consideration the additional, non-functional requirements of High-Energy Physics (HEP). Electronic systems applied in HEP often operate in difficult conditions. Access to such devices is difficult or even impossible. The HEP systems require high availability, serviceability...
This paper is a strong critic to the classical procedure used for the prediction of failure occurrences for mechanical and electronic equipment. The present procedure is based on the concept of randomness that has the undoubted vantage of the easiness, moreover, it is traditionally used so it is well known by scientists, technicians and experts in the field, but it a priori renounces to the knowledge...
This paper discusses SEE effects in an architecture based on commercial-off-the-shelf multicore processors for consolidating mixed criticalities applications in single board computers for space applications. This paper builds on previously proposed system-level architectures for mixed-criticality applications, describing them both for convenience together with the previous validation results. The...
The Internet of Things (IoT) paradigm describes a vision where different heterogeneous physical objects like cell phones, computers, sensors, cars, refrigerators, kitchen appliances, TVs, smart homes are connected over the Internet in a global network. Such an immense network of interconnected objects will raise some new dependability and security challenges. In this paper, we propose a way to address...
In the paper, mathematical support and software of a computer-aided design system of preventive maintenance schedule of radio communication equipment are proposed. Mathematical support is based on a Monte Carlo simulation model of an operational process that realizes multivariate approach of reliability indices estimation. System's software was implemented using C++ language and Matlab instruments...
This paper presents a mathematical model for assessing the availability of a non-redundant telecommunications system, which is continuously tested during operation. The types of faults that can occur in such systems are defined as permanent and intermittent faults. Mathematical equations are derived to calculate the mean times spent by the system in the operable and repair states using the properties...
By taking both CMF (Common Mode Failure) and middle states into account, numerical analysis of availability of cluster system is analyzed. Firstly, a CTMC (Continuous Time Markov Chain) model of cluster system containing three cluster nodes is constructed with failure rate (λ), repair rate (μ), CMF rate (7), reconfiguration rate (β) and reset rate (á) etc. Then the steady state solution of the CMTC...
Applications well-defined with high Fault Tolerance index are considered reliable and trustworthy to drive quality. Fault Tolerance metrics for web mobile applications are neither defined formally nor are they organized at a single place for measurement to researchers and quality engineers. Fault Tolerance metrics determines the quality of web mobile applications provided they are measured accurately...
In the last decades, the interest in solar photovoltaic (PV) energy has increased considerable around the world. That are many publications that focus on the temperature assessment of PV modules and solar heat collectors but fewer discuss the temperature and reliability evaluation of PV-inverters components. IGBT power modules are the key components from the reliability point of view. Some solar power...
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