A Hybrid Individual‐Based and Food Web–Ecosystem Modeling Approach for Assessing Ecological Risks to the Topeka Shiner ( Notropis topeka ): A Case Study with Atrazine

2019 ◽  
Vol 38 (10) ◽  
pp. 2243-2258
Author(s):  
Steven M. Bartell ◽  
Amelie Schmolke ◽  
Nicholas Green ◽  
Colleen Roy ◽  
Nika Galic ◽  
...  
Keyword(s):  
Food Web ◽  
Ecosystem Modeling ◽  
Ecological Risks ◽  
Hybrid Individual ◽  
Modeling Approach ◽  
Notropis Topeka ◽  
Topeka Shiner

scholarly journals Lifetime Benefit Analysis of Intelligent Maintenance: Simulation Modeling Approach and Industrial Case Study

2021 ◽  
Vol 11 (8) ◽  
pp. 3487
Author(s):  
Helge Nordal ◽  
Idriss El-Thalji
Keyword(s):  
Simulation Model ◽  
Simulation Modeling ◽  
Study Data ◽  
Opportunistic Maintenance ◽  
Maintenance Strategies ◽  
Modeling Approach ◽  
Intelligent Maintenance ◽  
Diagnosis And Prognosis ◽  
Case Study Data

The introduction of Industry 4.0 is expected to revolutionize current maintenance practices by reaching new levels of predictive (detection, diagnosis, and prognosis processes) and prescriptive maintenance analytics. In general, the new maintenance paradigms (predictive and prescriptive) are often difficult to justify because of their multiple inherent trade-offs and hidden systems causalities. The prediction models, in the literature, can be considered as a “black box” that is missing the links between input data, analysis, and final predictions, which makes the industrial adaptability to such models almost impossible. It is also missing enable modeling deterioration based on loading, or considering technical specifications related to detection, diagnosis, and prognosis, which are all decisive for intelligent maintenance purposes. The purpose and scientific contribution of this paper is to present a novel simulation model that enables estimating the lifetime benefits of an industrial asset when an intelligent maintenance management system is utilized as mixed maintenance strategies and the predictive maintenance (PdM) is leveraged into opportunistic intervals. The multi-method simulation modeling approach combining agent-based modeling with system dynamics is applied with a purposefully selected case study to conceptualize and validate the simulation model. Three maintenance strategies (preventive, corrective, and intelligent) and five different scenarios (case study data, manipulated case study data, offshore and onshore reliability data handbook (OREDA) database, physics-based data, and hybrid) are modeled and simulated for a time period of 20 years (175,200 h). Intelligent maintenance is defined as PdM leveraged in opportunistic maintenance intervals. The results clearly demonstrate the possible lifetime benefits of implementing an intelligent maintenance system into the case study as it enhanced the operational availability by 0.268% and reduced corrective maintenance workload by 459 h or 11%. The multi-method simulation model leverages and shows the effect of the physics-based data (deterioration curves), loading profiles, and detection and prediction levels. It is concluded that implementing intelligent maintenance without an effective predictive horizon of the associated PdM and effective frequency of opportunistic maintenance intervals, does not guarantee the gain of its lifetime benefits. Moreover, the case study maintenance data shall be collected in a complete (no missing data) and more accurate manner (use hours instead of date only) and used to continuously upgrade the failure rates and maintenance times.

scholarly journals URBAN MODELLING WITH TYPOLOGICAL APPROACH. CASE STUDY: MERIDA, YUCATAN, MEXICO

2017 ◽  
Vol XLII-2/W5 ◽  
pp. 617-620
Author(s):  
A. Rodriguez
Keyword(s):  
3D Modeling ◽  
Three Dimensional ◽  
Historical Reconstruction ◽  
Colonial Era ◽  
Common Features ◽  
Modeling Approach ◽  
Urban Modelling ◽  
Typological Approach ◽  
Three Dimensional Models

In three-dimensional models of urban historical reconstruction, missed contextual architecture faces difficulties because it does not have much written references in contrast to the most important monuments. This is the case of Merida, Yucatan, Mexico during the Colonial Era (1542-1810), which has lost much of its heritage. An alternative to offer a hypothetical view of these elements is a typological - parametric definition that allows a 3D modeling approach to the most common features of this heritage evidence.

Class-modeling approach to PTR-TOFMS data: a peppers case study

2014 ◽  
Vol 95 (8) ◽  
pp. 1757-1763 ◽  
Author(s):  
Cosimo Taiti ◽  
Corrado Costa ◽  
Paolo Menesatti ◽  
Diego Comparini ◽  
Nadia Bazihizina ◽  
...  
Keyword(s):  
Modeling Approach

MODIFIED HALO MODELING APPROACH A CASE STUDY OF HAI SU DEN FRACTURED BASEMENT RESERVOIR

2019 ◽  
Author(s):  
Hoang Gia Diem ◽  
Duong Tan Da ◽  
Nguyen Do Ngoc Nhi ◽  
Nguyen Tien Thanh
Keyword(s):  
Modeling Approach

Food web management. 4 case study of Lake Mendota (J. F Kitchell [ed.])

1993 ◽  
Vol 38 (7) ◽  
pp. 1587-1588
Author(s):  
John G. Stockner ◽  
Curtis A. Suttle
Keyword(s):  
Food Web ◽  
Lake Mendota ◽  
Web Management

Systematic Affinities of Notropis topeka (Topeka Shiner) Inferred from Sequences of the Cytochrome b Gene

Copeia ◽  
1995 ◽  
Vol 1995 (1) ◽  
pp. 199 ◽  
Author(s):  
Timothy R. Schmidt ◽  
John R. Gold
Keyword(s):  
Cytochrome B ◽  
Cytochrome B Gene ◽  
Notropis Topeka ◽  
Topeka Shiner

An agent-based modeling approach to predict the evolution of market share of electric vehicles: A case study from Iceland

2012 ◽  
Vol 79 (9) ◽  
pp. 1638-1653 ◽  
Author(s):  
Ehsan Shafiei ◽  
Hedinn Thorkelsson ◽  
Eyjólfur Ingi Ásgeirsson ◽  
Brynhildur Davidsdottir ◽  
Marco Raberto ◽  
...  
Keyword(s):  
Market Share ◽  
Electric Vehicles ◽  
Agent Based Modeling ◽  
Agent Based ◽  
Modeling Approach
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