scholarly journals CleanStart DERMS: Modeling Effort Update

2018 ◽  
Author(s):  
Bishnu Bhattarai ◽  
Sri Nikhil Gourisetti ◽  
Priya Thekkumparambath Mana ◽  
Jason Fuller
Keyword(s):  
Modeling Effort

scholarly journals Whole Heliosphere Interval: Overview of JD16

2009 ◽  
Vol 5 (H15) ◽  
pp. 471-479 ◽  
Author(s):  
David F. Webb ◽  
Sarah E. Gibson ◽  
Barbara J. Thompson
Keyword(s):  
Solar Minimum ◽  
Planetary System ◽  
Three Dimensional ◽  
50Th Anniversary ◽  
Carrington Rotation ◽  
Modeling Effort ◽  
International Geophysical Year ◽  
Simulations And Modeling ◽  
International Geophysical ◽  
Whole Heliosphere Interval

AbstractThe Whole Heliosphere Interval is an international observing and modeling effort to characterize the three-dimensional interconnected solar-heliospheric-planetary system, i.e., the “heliophysical” system. WHI was part of the International Heliophysical Year, on the 50th anniversary of the International Geophysical Year, and benefited from hundreds of observatories and instruments participating in IHY activities. WHI describes the 3-D heliosphere originating from solar Carrington Rotation 2068, March 20–April 16, 2008. The focus of IAU JD16 was on analyses of observations obtained during WHI, and simulations and modeling involving those data and that period. Consideration of the WHI interval in the context of surrounding solar rotations and/or compared to last solar minimum was also encouraged. Our goal was to identify connections and commonalities between the various regions of the heliosphere.

scholarly journals HESS Opinions: Repeatable research: what hydrologists can learn from the Duke cancer research scandal

2016 ◽  
Vol 20 (9) ◽  
pp. 3739-3743 ◽  
Author(s):  
Michael N. Fienen ◽  
Mark Bakker
Keyword(s):  
Cancer Research ◽  
Data Analysis ◽  
Data Management ◽  
Open Source ◽  
Modeling Effort ◽  
Cancer Study ◽  
The Past ◽  
Duke University ◽  
Collaborative Coding

Abstract. In the past decade, difficulties encountered in reproducing the results of a cancer study at Duke University resulted in a scandal and an investigation which concluded that tools used for data management, analysis, and modeling were inappropriate for the documentation of the study, let alone the reproduction of the results. New protocols were developed which require that data analysis and modeling be carried out with scripts that can be used to reproduce the results and are a record of all decisions and interpretations made during an analysis or a modeling effort. In the hydrological sciences, we face similar challenges and need to develop similar standards for transparency and repeatability of results. A promising route is to start making use of open-source languages (such as R and Python) to write scripts and to use collaborative coding environments (such as Git) to share our codes for inspection and use by the hydrological community. An important side-benefit to adopting such protocols is consistency and efficiency among collaborators.

Arriving from Delphi at O'Hare: Predictive Cognitive Engineering in the O'Hare Modernization Project and Beyond

2005 ◽  
Vol 49 (1) ◽  
pp. 108-112
Author(s):  
Steven Estes
Keyword(s):  
Cognitive Modeling ◽  
Mental Workload ◽  
Cognitive Models ◽  
Cognitive Engineering ◽  
Work Time ◽  
Modeling Effort ◽  
International Airport

This paper describes a cognitive modeling effort for the O'Hare Modernization Project (OMP). Beginning with a statement of the problem, it describes how cognitive modeling was used to measure the mental workload and work time of controllers running various positions at O'Hare International Airport, both under the current airport configurations and a future set of configurations (proposed in the OMP). The O'Hare case is used as an exemplar of the type of data that can be acquired with relatively simple cognitive models

Typical event sequences as licensors of direct object ellipsis in Russian

2018 ◽  
Vol 41 (2) ◽  
pp. 179-212
Author(s):  
Marjorie McShane
Keyword(s):  
Intelligent Agents ◽  
Cognitive Modeling ◽  
Direct Object ◽  
Event Sequence ◽  
Language Understanding ◽  
Modeling Effort ◽  
Event Sequences ◽  
Sequence Of Events ◽  
Typical Sequence ◽  
Typical Event

Abstract This paper extends the computationally-oriented theory of ellipsis presented in McShane’s A Theory of Ellipsis (2005) by introducing the feature typical event sequence. It is argued that, in Russian, the presence of a typical sequence of events in a pair of clauses can be the key feature licensing the ellipsis of the latter’s direct object. The linguistic analysis contributes to a larger cognitive modeling effort aimed at configuring language-endowed intelligent agents with human-level language understanding capabilities.

scholarly journals Modeling the Local Bubble

1997 ◽  
Vol 166 ◽  
pp. 121-131 ◽  
Author(s):  
Donald P. Cox
Keyword(s):  
Solar System ◽  
Facial Expressions ◽  
Simplified Model ◽  
Observational Constraints ◽  
Local Bubble ◽  
Interstellar Absorption ◽  
Modeling Effort ◽  
X Ray ◽  
Idealized Modeling ◽  
X Ray Background

AbstractModeling the Local Bubble is one of those activities fraught with danger. It is very easy to be too naive, to fail to consider the dependence of the model on assumptions about the nearby ambient state, or the likelihood of such a structure. It is similarly easy to become so caught up in the details of the vicinity that it is unclear where to begin a necessarily idealized modeling effort. And finally, it is important to remember that the data we have may in some cases be lying to us, and that we have not yet learned to read their facial expressions quite carefully enough.That said, I’ve tried in this paper to be helpful to those who may wish to take the risks. I surveyed the very most basic stories that the data seem to tell, and pointed out the standard coincidences that may be telling us a lot about what is happening, but may turn out once again to have been just coincidences. I’ve described 5 distinct conceptions that in one flavor or another pretty well survey the collection of mental images that have so far been carried by those who’ve attempted models. One may be right, or something entirely different may be more appropriate. It’s at least vital to realize that a conception comes first, followed by a simplified model of details. I’ve also included a long list of questions directed at observers. Some have partial answers, some one wouldn’t know today quite how to approach. But it is a list that students of the soft x-ray background, interstellar absorption lines, possible instrumentation, and the heliosphere may wish to review from time to time, just to see whether they can figure out how to be more helpful. There is another list for modelers, things the models must address, however-so-flimsily if necessary, because there are strong observational constraints (and stronger ones coming) on what can and cannot be present in the local ISM. To that I’ve added a few remarks concerning x-ray emission coming from beyond the Local Bubble, and another few on how x-ray emission from within the solar system might be contaminating what we see. That last bit is new, exciting, and possibly wrong, but it is an example of the ongoing wariness I believe one has to take toward the facts in the case. By the way, Dieter, it really was a great meeting.

Modeling of Autonomous Hydrofoil Craft Tracking a Moving Target

2020 ◽  
Vol 08 (02) ◽  
pp. 171-178 ◽  
Author(s):  
Konstantin I. Matveev
Keyword(s):  
Horizontal Plane ◽  
High Speed ◽  
Effective Control ◽  
Moving Target ◽  
Control Methods ◽  
Modeling Effort ◽  
Pure Pursuit ◽  
Marine Vessels ◽  
Marine Vehicle

The interest in autonomous marine vessels has been continuously growing in the recent years. Most platforms of the autonomous surface watercraft involve traditional mono- or multi-hulls. Advanced marine vehicle concepts, such as hydrofoils, can provide high-speed and high seakeeping capabilities. In this study, a modeling effort is initiated for a small autonomous hydrofoil boat intended for intercepting operations. A 3-DOF model, including surge, sway and yaw, is applied for simulating maneuvering motions of the boat in the foilborne state. Forces generated by the propulsor, rudder and struts are accounted for in the simulations of the horizontal-plane boat dynamics. Two scenarios of a hydrofoil boat pursuing a moving target are investigated. In the pure pursuit, the interceptor always attempts to aim at the target and uses full thrust to quickly reach the target at a high speed. In the constant-bearing scenario, the interceptor approaches the target with diminishing speed trying to achieve a rendezvous. The presented models and results can help engineers to design more effective control methods for fast boats intended for intercepting operations.

scholarly journals Determining a reasonable range of relative numerical tolerance values for simulating deterministic models of biochemical reactions

2018 ◽  
Author(s):  
Ming Yang ◽  
Louis Z. Yang
Keyword(s):  
Uncertainty Principle ◽  
Deterministic Model ◽  
Biochemical Reaction ◽  
Biochemical Reactions ◽  
Deterministic Models ◽  
Modeling Effort ◽  
Reasonable Range ◽  
Simulation Results

ABSTRACTWhat values of relative numerical tolerance should be chosen in simulation of a deterministic model of a biochemical reaction is unclear, which impairs the modeling effort since the simulation outcomes of a model may depend on the relative numerical tolerance values. In an attempt to provide a guideline to selecting appropriate numerical tolerance values in simulation of in vivo biochemical reactions, reasonable numerical tolerance values were estimated based on the uncertainty principle and assumptions of related cellular parameters. The calculations indicate that relative numerical tolerance values can be reasonably set at or around 10−4 for the concentrations expressed in ng/L. This work also suggests that further reducing relative numerical values may result in erroneous simulation results.

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