Offshore wind turbines are complex pieces of engineering and are, generally, exposed to harsh environmental conditions that making them susceptible unexpected potentially catastrophic damage. This results in significant downtime high maintenance costs. Therefore, early detection major failures is important improve availability, boost power production, reduce article proposes a supervisory contr...

This study focuses on the effect of accountability, transparency, and operational efficiency decision to pay zakat with ability as a moderating variable at national amil institution in Surabaya. The population used this was 105.644 people. sample 399 people determined by non-probability sampling method. In study, questionnaire research instrument used, namely, set questions addressed respondent...

To assess operational performance of air traffic control sector, a multivariate detection index system consisting of 5 variables and 17 indicators is presented, which includes operational trafficability, operational complexity, operational safety, operational efficiency, and air traffic controller workload. An improved comprehensive evaluation method, is designed for the assessment by optimizin...

Microbial electrolysis cell (MEC) is one of the promising and cutting-edge technologies for generating hydrogen from wastewater through biodegradation of organic waste by exoelectrogenic microbes. In the MECs, the operational parameters, such as applied voltage (Eap), anode surface area, anode-cathode distance, and N2/CO2 volume ratio have a significant impact on the hydrogen yield and producti...

Overview Description of real life problem Motivation for choosing a multiple objective model Multiple objective model (decision variables, objectives, constraints) Technique used to solve the problem Analysis of results Opinion about the proposed model and solution approach Description of the real life problem We consider a waste incineration plant Input : Waste (cardboard, wood, glass, food wa...

In this paper, we focus on the relationship between operations-based variables (specifically, production speed, scrap rate and maintenance speed) and the manufacturing cost. These variables usually produce opposite influences on the variable cost and the fixed cost. For example, setting the production speed at a high level is beneficial for reducing the variable cost. However, maintaining the h...

Two-stage data envelopment analysis (2-DEA) is commonly used in productive efficiency analysis to estimate the effects of operational conditions and practices on performance. In this method the DEA efficiency estimates are regressed on contextual variables representing the operational conditions. We reexamine the statistical properties of the 2-DEA estimator, and find that it is statistically c...

We formally specified the type system and operational semantics of Loop with Ott and Isabelle/HOL proof assistant. Moreover, both the type system and the semantics of Loop have been tested using Isabelle/HOL program extraction facility for inductively defined relations. In particular, the program that computes the Ackermann function type checks and behaves as expected. The main difference (apar...

Efficiency improvement is one of three patterns a public utility should follow in order to get funds for investments realization. The other two are recourse to bank loans or to private equity and tariff increase. Efficiency can be improved, for example, by growth and vertical integration and may be conditioned by environmental variables, such as customer and output density. Prior studies into t...