Abstract. The growing size of wind turbines leads to extremely high tip speeds when the blades are rotating. prone leading edge erosion raindrops hit at such speeds, and blade damage will eventually affect power production until repair or replacement is performed. Since these actions come with a cost, it relevant estimate lifetime for given farm site prior construction. Modeling tools predictio...

Reliability as one of main indices of quality deals with products in service. There has developed the intensive study of distribution types in the reliability theory. Ramified computing systems often have elements which are exposed to aging on output level. Lifetime of such elements is often circumscribed by the Rayleigh distribution. Elements of upper levels have lifetime circumscribed by the ...

One of the main design constraints in mobile adhoc networks (MANETs) is that they are power constrained. Hence, every effort is to be channeled towards reducing power. More precisely, network lifetime is a key design metric in MANETs. Since every node has to perform the functions of a router, if some nodes die early due to lack of energy, it will not be possible for other nodes to communicate w...

Three-parameter lognormal distribution has been demonstrated for applications in electromigration data analysis, especially for Cu interconnect structures with insufficient redundancy. Examples are given on estimating parameter values from experimental data using the maximum likelihood method. Detailed analyses are presented on confidence bound estimations of the parameters and their propagatio...

A citations analysis Purpose of this paper This paper addresses the question: should the world s top universities be led by top researchers, and are they? Design / methodology / approach The lifetime citations are counted by hand of the leaders of the world s top 100 universities identified in a global university ranking. These numbers are then normalised by adjusting for the different citation...

The authors develop a framework that incorporates projected profitability of customers in the computation of lifetime duration. Furthermore, the authors identify factors under a manager’s control that explain the variation in the profitable lifetime duration. They also compare other frameworks with the traditional methods such as the recency, frequency, and monetary value framework and past cus...

Most existing integrated circuit reliability models assume a uniform, typically worst-case, operating temperature, but temporal and spatial temperature variations affect expected device lifetime. As a result, design decisions and dynamic thermal management techniques using worst-case models are pessimistic and result in excessive design margins and unnecessary runtime engagement (and associated...

Background: The likelihood of developing Posttraumatic Stress Disorder (PTSD) depends on the interaction of individual risk factors and cumulative traumatic experiences. Hence, the identification of individual susceptibility factors warrants precise quantification of trauma exposure. Previous research indicated that some traumatic events may have more severe influences on mental health than oth...

Prediction of the remaining life of high-voltage power transformers is an important issue for energy companies because of the need for planning maintenance and capital expenditures. Lifetime data for such transformers are complicated because transformer lifetimes can extend over many decades and transformer designs and manufacturing practices have evolved. We were asked to develop statistically...

Limited energy is the major driving factor for research on wireless sensor networks. Clustering alleviates this energy shortage problem by reducing data traffic conveyed over the network and therefore several clustering methods are proposed in the literature. Researchers put forward their methods by making serious assumptions such as always locating single sink at one side of the topology or ma...