Periodically ordered mesoporous titania thin films (MTTF) present a high surface area, controlled porosity in the 2-20 nm pore diameter range and an amorphous or crystalline inorganic framework. These materials are nowadays routinely prepared by combining soft chemistry and supramolecular templating. Photocatalytic transparent coatings and titania-based solar cells are the immediate promising a...

In this investigation, the explicit expressions for reliability function and mean time to failure (MTTF) of a repairable system with provision of spares and removable multi-repair facility have been established. In removable repairmen strategy, the repairmen turn on when there are N or more than N failed units and turn-off when system is empty. The failure times of operating/spare units and rep...

Electromigration of eutectic SnPb flip chip solder joints and their mean-time-to-failure ~MTTF! have been studied in the temperature range of 100 to 140 °C with current densities of 1.9 to 2.75 310 A/cm. In these joints, the under-bump-metallization ~UBM! on the chip side is a multilayer thin film of Al/Ni~V!/Cu, and the metallic bond-pad on the substrate side is a very thick, electroless Ni la...

Wireless closed-loop control is of major significance for future industrial manufacturing. However, applications pose stringent quality service requirements reliable operation. Contrary to traditional ultra-reliable low-latency communications design goals such as low packet loss rates and latency, research results in the domain networked systems (NCS) state that depending on sampling period, in...

The article analyzes the operational reliability of filter on gas turbine compressor intake and electric transformer connector. Empirical data (statistical sample) were collected to determine failure density function f (t), hazard λ expected value mean time MTTF. numerical model was created in Minitab 19 software tool. Anderson-Darling test used accept or reject hypothesis.

Increasing MTTF requires increasing reliability. In previous lectures we saw a variety of ways to do so: testing, static analysis, formal methods, etc. A highly reliable system is a highly available system. Reducing MTTR requires reducing the (mean) time it takes for the system to come back up once a failure has occurred. Once a failure occurs, we must detect it, diagnose it, and the recover th...

Maintaining performance in a faulty distributed computing environment is a major challenge in the design of future peta and exa-scale class systems. Better defining application resilience as a function of scale, is a key to developing reliable software systems and programming methodologies. This paper defines the resilience of a task as the survivability of that task (i.e., how well will it sur...

Improved performance and reliability of 9xx nm single emitter laser diodes are presented. To date, over 15,000 hours of accelerated multi-cell lifetest reliability data has been collected, with drive currents from 14A to 18A and junction temperatures ranging from 60C to 110C. Out of 208 devices, 14 failures have been observed so far. Using established accelerated lifetest analysis techniques,...