The Experts below are selected from a list of 1629 Experts worldwide ranked by ideXlab platform
George Chryssolouris - One of the best experts on this subject based on the ideXlab platform.
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an approach to operational aircraft Maintenance planning
Decision Support Systems, 2010Co-Authors: Nikolaos Papakostas, P Papachatzakis, Vangelis Xanthakis, Dimitris Mourtzis, George ChryssolourisAbstract:This paper describes a short-term planning methodology of the line Maintenance activities of an airline operator, at the airports, during turn-around time (TAT). The proposed methodology supports decision making for deferring Maintenance actions that affect the dispatching of the aircrafts, aiming at high fleet operability and low Maintenance cost. Based on health assessment and additional information regarding operational and economical constraints at the operator's fleet level, a multi-criteria mechanism evaluates a set of generated Maintenance plan alternatives. An alternative is defined as the possible allocation of all Deferred Maintenance tasks to a set of suitable airport resources. The selected decision making criteria are cost, remaining useful life (RUL), operational risk and flight delay. A series of experiments is conducted in order to validate and test the approach.
K Ramanjaneyulu - One of the best experts on this subject based on the ideXlab platform.
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condition evaluation of existing reinforced concrete bridges using fuzzy based analytic hierarchy approach
Expert Systems With Applications, 2008Co-Authors: Saptarshi Sasmal, K RamanjaneyuluAbstract:There is an urgent need for a systematic methodology for condition assessment of the bridges because the old bridges of most of the countries are inadequate to carry current-day traffic and satisfy the present codal provisions and even in newer bridges, deterioration caused by unforeseen service condition and Deferred Maintenance is of great concern. In view of this, an attempt has been made in this study to develop a systematic procedure and formulations for condition evaluation of existing bridges using Analytic Hierarchy Process in a fuzzy environment. Analytic Hierarchy Process (AHP) is an efficient decision making tool for complicated problems with multiple evaluation criteria and uncertainty. Fuzzy logic approach has been used to take care of the uncertainties and imprecision in the bridge inspector's observations. In this paper, first, a methodology has been proposed for condition ranking of number of reinforced concrete (RC) bridges. Then, based on the results obtained from prioritization, rating of the most deserved bridge has been carried out using MADM based fuzzy logic. Computer programs have been developed based on the formulations presented in this paper for evaluating condition of existing bridges and the details are presented in the paper. The methodology and its application are demonstrated through a case study. This methodology would certainly help the engineers and policy makers concerned with bridge management to overcome the problem related to prioritization and decision on funding related to rehabilitation of bridges.
Rayls, Emilee A - One of the best experts on this subject based on the ideXlab platform.
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Big Bone Lick State Park, A Land Lost in Time
Encompass, 2020Co-Authors: Rayls, Emilee AAbstract:Big Bone Lick State Park is located at Big Bone in Boone County, Kentucky. The park is home to many educational attractions such as; a herd of bison, a museum, hiking trails, recreational events, campgrounds, and a lake. Big Bone has also been recorded to be one of the Lewis and Clark heritage sites east of the Mississippi River. It was estimated by recreational officials that ten percent of the American population will participate in a Lewis and Clark activity in the next three years. The officials also stated if Kentucky could get one percent of the expected grow that would be a huge inflation in the visitation to the state. A study revealed that in 2002 visitors to Boone, Kenton, and Campbell county brought in $219 million in indirect spending into the economy. But since then the park has suffered many budgeting issues park commissioners say the park is in need of $240 million in Deferred Maintenance charges, also due to the recent flooding in the area the damn has started leaking making the lake and some trails have to close because of safety recently the park received $1.1 million in improvements by Governor Bevin. It is a start to helping this park succeed but I believe the way to get more visitors is to market the park to the public more. Since the park is so rich in history and has so much promise in teaching visitors about the history of Kentucky it should be one of the states top priorities to give this park the funding and advertising it deserves
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Big Bone Lick State Park, A Land Lost in Time
Encompass, 2020Co-Authors: Rayls, Emilee A, Bradley, Michael J.Abstract:Big Bone Lick State Park is located at Big Bone in Boone County, Kentucky. The park is home to many educational attractions such as; a herd of bison, a museum, hiking trails, recreational events, campgrounds, and a lake. Big Bone has also been recorded to be one of the Lewis and Clark heritage sites east of the Mississippi River. It was estimated by recreational officials that ten percent of the American population will participate in a Lewis and Clark activity in the next three years. The officials also stated if Kentucky could get one percent of the expected grow that would be a huge inflation in the visitation to the state . A study revealed that in 2002 visitors to Boone, Kenton, and Campbell county brought in $219 million in indirect spending into the economy. But since then the park has suffered many budgeting issues park commissioners say the park is in need of $240 million in Deferred Maintenance charges, also due to the recent flooding in the area the damn has started leaking making the lake and some trails have to close because of safety recently the park received $1.1 million in improvements by Governor Bevin. It is a start to helping this park succeed but I believe the way to get more visitors is to market the park to the public more. Since the park is so rich in history and has so much promise in teaching visitors about the history of Kentucky it should be one of the states top priorities to give this park the funding and advertising it deserves.https://encompass.eku.edu/swps_undergraduategallery/1268/thumbnail.jp
Nikolaos Papakostas - One of the best experts on this subject based on the ideXlab platform.
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an approach to operational aircraft Maintenance planning
Decision Support Systems, 2010Co-Authors: Nikolaos Papakostas, P Papachatzakis, Vangelis Xanthakis, Dimitris Mourtzis, George ChryssolourisAbstract:This paper describes a short-term planning methodology of the line Maintenance activities of an airline operator, at the airports, during turn-around time (TAT). The proposed methodology supports decision making for deferring Maintenance actions that affect the dispatching of the aircrafts, aiming at high fleet operability and low Maintenance cost. Based on health assessment and additional information regarding operational and economical constraints at the operator's fleet level, a multi-criteria mechanism evaluates a set of generated Maintenance plan alternatives. An alternative is defined as the possible allocation of all Deferred Maintenance tasks to a set of suitable airport resources. The selected decision making criteria are cost, remaining useful life (RUL), operational risk and flight delay. A series of experiments is conducted in order to validate and test the approach.
Donald R Drew - One of the best experts on this subject based on the ideXlab platform.
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using simulation to understand the impact of Deferred Maintenance
Computer-aided Civil and Infrastructure Engineering, 2002Co-Authors: Allan D Chasey, Jesus M De La Garza, Donald R DrewAbstract:Understanding the impact of Deferred Maintenance on a highway system can help policy makers and transportation planners in the decision process on how to best utilize limited resources to provide for an area's total infrastructure needs. This paper presents the development of a framework and methodology to use dynamic simulation to understand and quantify the impact of Deferred Maintenance and the effect on user and non-user benefits. This simulation will allow the testing of policies or assumptions for their impact over time, in order to gain insight into the problem solution. A hypothetical region is used to demonstrate the use of the framework, and three possible measures of effectiveness, total net benefits per capita, revenues less expenditures, and benefit-cost ratio, are introduced that could be utilized to help decision-makers understand the impact of various Maintenance funding rates on different interest groups being served within the community. The model can be calibrated to a region to provide specific impact information for that location.
