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Evaluating effects of application based and automatic energy saving strategies on NWChem 25

Evaluating effects of application based and automatic energy...

25th High Performance Computing Symposium, HPC 2017, Part of the 2017 Spring simulation Multi-Conference, SpringSim 2017

作者： Sundriyal, Vaibhav Fought, Ellie Sosonkina, Masha Windus, Theresa L. Department of Modeling Simulation and Visualization Engineering Old Dominion University NorfolkVA23529 United States Department of Chemistry Iowa State University AmesIA50010 United States

ISBN: (纸本)9781510838222

High-performance application developers are becoming increasingly aware of effects of the increasing energy consumption on the costs and reliability of modern computing systems. A traditional way to achieve energy savings is by changing the processor frequency dynamically during application execution. Several techniques have been proposed in the past at application, library, and transparent level. In this work, the effect of two such techniques, at application and transparent levels, are evaluated in terms of their effects on the execution time and energy consumption for different algorithms in the quantum chemistry package NWChem. Experimental results depict that there is no clear winner between the two methods since the transparent-level makes decisions without intimate knowledge of the application while the strategy based solely on application does not take into the account the platform characteristics at the runtime. Hence, it is argued that the best strategy would be a hybrid of the two levels. ©2017 Society for modeling & simulation International (SCS).

关键词： Energy utilization

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TOWARDS AN ANATOMICAL modeling PIPELINE FOR simulation AND ACCURATE NAVIGATION FOR BRAIN AND SPINE SURGERY 17

TOWARDS AN ANATOMICAL MODELING PIPELINE FOR SIMULATION AND A...

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simulation Multiconference

作者： Michel A. Audette Tanweer Rashid Shrabani Ghosh Nirmal Patel Sharmin Sultana Department of Modeling Simulation and Visualization Engineering Old Dominion University

ISBN: (纸本)9781510838284

This paper summarizes work underway on neurosurgery simulation and navigation, emphasizing anatomical modeling techniques and clinical requirements for simulation. We describe innovations that center on patient-specific anatomical modeling of the brain, including skull base anatomy, and spine. In general, we advocate a model-based approach to segmentation that leverages digital atlases of the anatomy, as well as a discrete deformable contour or surface model which can be deformed to fit patient image data. Furthermore, we proceed in a manner that represents several tissue boundaries at once, whereby a voxel-based functional atlas is expressed as a deformable 2-Simplex multi-surface model. Our research has also endowed the 2-Simplex multi-surface model with shape statistics and shared faces. We also describe innovations on deformable 1-Simplex 3D contour models that have been applied to identifying the intracranial portion of cranial nerves. Innovations on the clinical requirements front relate to the development of neurosurgical ontologies.

关键词： Surgery simulation Meshing Segmentation Intra-operative tissue shift Therapy planning engaging Cerebrum simulating Technological Innovations surface modeling navigation Anatomic Models pipeline WWOX gene image data Anatomy atlas modeling Skull Base

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AN AGENT-BASED simulation OF THE IMPACT OF YOGIC BREATHING ADOPTION 17

AN AGENT-BASED SIMULATION OF THE IMPACT OF YOGIC BREATHING A...

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simulation Multiconference

作者： Saturnina Nisperos Sonali Kakde Frederic McKenzie Department of Modeling Simulation & Visualization Engineering Old Dominion University

ISBN: (纸本)9781510838284

Stress can impose negative impact on the health and well-being of a person. People who do not have tools to manage their stress are more likely to acquire cardiovascular disease (CVD) - the leading cause of death in the USA. For affected individuals, it not only implies health risks but also increased medical expenditures which can lead to financial issues - the top stressor in the USA. Research studies reveal that yoga reduces the stress perceived and modulates stress response systems. In this study, an agent-based model was developed to simulate the impact of adopting a yogic breathing technique, particularly on managing stress, preventing CVD and reducing the associated medical expenses. The simulation results show that people who practice SKY have generally lower and normal SBP, BMI and stress levels while those who don't, have generally higher levels and fall into the high-risk category.

关键词： Agent-based model Cardiovascular disease Yogic breathing technique Cardiovascular Diseases Agent-Based modeling respiration Cause of Death stresses Stress (mechanics) Stress Persons simulating sky Yoga Stress intensity Health hazards Stressing Adoption

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Hurricane Evacuation modeling Using Behavior Models and Scenario-Driven Agent-based simulations

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Procedia Computer Science 2018年 130卷 836-843页

作者： Yuan Zhu Kun Xie Kaan Ozbay Hong Yang New York University C2SMART Center (A Tier USDOT UTC) 6 Metrotech Center Brooklyn NY 11201 USA Old Dominion University Department of Modeling Simulation & Visualization Engineering 4700 Elkhorn Ave Norfolk VA 23529 USA University of Canterbury Department of Civil and Natural Resources Engineering 20 Kirkwood Ave Christchurch 8041 New Zealand

Transportation modeling and simulation play an important role in the planning and management of emergency evacuation. It is often indispensable for the preparedness and timely response to extreme events occurring in highly populated areas. Reliable and robust agent-based evacuation models are of great importance to support evacuation decision making. Nevertheless, these models rely on numerous hypothetical causal relationships between the evacuation behavior and a variety of factors including socio-economic characteristics and storm intensity. Understanding the impacts of these factors on evacuation behaviors (e.g., destination and route choices) is crucial in preparing optimal evacuation plans. This paper aims to contribute to the literature by integrating well-calibrated behavior models with an agent-based evacuation simulation model in the context of hurricane evacuation. Specifically, discrete choice models were developed to estimate the evacuation behaviors based on large-scale survey data in Northern New Jersey. Monte-Carlo Markov Chain (MCMC) sampling method was used to estimate evacuation propensity and destination choices for the whole population. Finally, evacuation of over a million residents in the study area was simulated using agent-based simulation built in MATSim. The agent-based modeling framework proposed in this paper provides an integrated methodology for evacuation simulation with specific consideration of agents’ behaviors. The simulation results need to be further validated and verified using real-world evacuation data.

关键词： Hurricane evacuation demand modeling agent-based simulation MATSim

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Proposed unified discrete event simulation content roadmap for M&S curricula 17

Proposed unified discrete event simulation content roadmap f...

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simulation Winter Conference

作者： James F. Leathrum Roland R. Mielke Andrew J. Collins Michel A. Audette Department of Modeling Simulation and Visualization Engineering Old Dominion University Norfolk VA USA

ISBN: (纸本)9781538634271

This paper presents a new educational roadmap for teaching discrete event system (DES) simulation software design. This roadmap represents the hierarchical structure and inter-relationships characterizing the worldviews of DES simulation, namely, event scheduling and process interaction. The roadmap was developed from the authors' experience while teaching DES simulation to both undergraduate and graduate students, spanning several years. The roadmap's development was motivated by the need to strive for greater completeness as well as fewer inconsistencies in the material curriculum. The commonality between the worldviews is highlighted in striving for a uniform approach. The intent of this paper is to provide other educators a foundation for their own DES simulation course development. A simple example is used to illustrate the worldviews within the roadmap.

关键词： Software Markov processes Petri nets Flowcharts Algorithms

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EVALUATING EFFECTS OF APPLICATION BASED AND AUTOMATIC ENERGY SAVING STRATEGIES ON NWCHEM 17

EVALUATING EFFECTS OF APPLICATION BASED AND AUTOMATIC ENERGY...

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simulation Multiconference

作者： Vaibhav Sundriyal Masha Sosonkina Ellie Fought Theresa L. Windus Department of Modeling Simulation and Visualization Engineering Old Dominion University Department of Chemistry Iowa State University

ISBN: (纸本)9781510838222

关键词： DVFS Energy Power NWChem Oversubscription energy saving Energy sources Platform Characteristics energy consumption execution time AUTOMATIC Power (Psychology) Hyalin

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A New Job Shop Heuristic Algorithm for Machine Scheduling Problems

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Journal of Applied Mathematics and Physics 2017年第11期5卷 2172-2182页

作者： Maryam Ehsaei Duc T. Nguyen Civil and Environmental Engineering Department Old Dominion University Norfolk VA USA Civil and Environmental Engineering (CEE) and Modeling Simulation and Visualization Engineering (MSVE) Departments Old Dominion University Norfolk VA USA

The purpose of this research is to present a straightforward and relatively efficient method for solving scheduling problems. A new heuristic algorithm, with the objective of minimizing the makespan, is developed and presented in this paper for job shop scheduling problems (JSP). This method determines jobs’ orders for each machine. The assessment is based on the combination of dispatching rules e.g. the “Shortest Processing Time” of each operation, the “Earliest Due Date” of each job, the “Least Tardiness” of the operations in each sequence and the “First come First Serve” idea. Also, unlike most of the heuristic algorithms, due date for each job, prescribed by the user, is considered in finding the optimum schedule. A multitude of JSP problems with different features are scheduled based on this proposed algorithm. The models are also solved with Shifting Bottleneck algorithm, known as one of the most common and reliable heuristic methods. The result of comparison between the outcomes shows that when the number of jobs are less than or equal to the number of machines, the proposed algorithm concludes smaller, and better, makespan in a significantly lower computational time, which shows the superiority of the suggested algorithm. In addition, for a category when the number of jobs are greater than the number of machines, the suggested algorithm generates more efficient results when the ratio of the number of jobs to the number of machines is less than 2.1. However, in this category for the mentioned ratio to be higher than 2.1, the smaller makespan could be generated by either of the methods, and the results do not follow any particular trend, hence, no general conclusions can be made for this case.

关键词： Heuristic Algorithm Job Shop Scheduling Shifting Bottleneck Makespan

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Runtime power limiting of parallel applications on Intel Xeon phi processors 4

Runtime power limiting of parallel applications on Intel Xeo...

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4th International Workshop on Energy Efficient Supercomputing, E2SC 2016

作者： Lawson, Gary Sundriyal, Vaibhav Sosonkina, Masha Shen, Yuzhong Department of Modeling Simulation and Visualization Engineering Old Dominion University NorfolkVA23529 United States

ISBN: (纸本)9781509038565

Energy-efficient computing is crucial to achieving exascale performance. Power capping and dynamic voltage/frequency scaling may be used to achieve energy savings. The Intel Xeon Phi implements a power capping strategy, where power thresholds are employed to dynamically set voltage/frequency at the runtime. By default, these power limits are much higher than the majority of applications would reach. Hence, this work aims to set the power limits according to the workload characteristics and application performance. Certain models, originally developed for the CPU performance and power, have been adapted here to determine power-limit thresholds in the Xeon Phi. Next, a procedure to select these thresholds dynamically is proposed, and its limitations outlined. When this runtime procedure along with static power-threshold assignment were compared with the default execution, energy savings ranging from 5% to 49% were observed, mostly for memory-intensive applications. © 2016 IEEE.

关键词： Benchmarking

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High-performance flow visualization for effective data analysis

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Journal of Flow visualization and Image Processing 2016年第1-2期23卷 41-57页

作者： Liu, Zhanping Moorhead, Robert J. Department of Modeling Simulation and Visualization Engineering Old Dominion University ODU-MSVE 1300 ECSB 4700 Elkhorn Avenue NorfolkVA23529 United States Department of Electrical and Computer Engineering Mississippi State University United States

As data grows at exponential rates toward exa-scale (1018) computing, it is necessary to exploit scientific visualization in the form of a visual, informative, and interactive methodology to help resolve daunting problems arising from a wide variety of disciplines that involve big data analysis. While novel visualization algorithms are investigated for effective as well as efficient exploration of surface and volume flows, there are signs of revisiting sparse geometry-based methods with further improvement, back from dense texture-based approaches, and resorting to parallel visualization. This paper presents our innovative research along this path in high-performance visualization of flow data for exploration, recognition, representation, and analysis of overall patt erns and salient features, with techniques from texture-based to geometry-based, flows from 2D to 3D, complexity from steady to unsteady, and computing from serial to parallel. Specifically, a high-level description is primarily focused on four algorithms, i.e., accelerated unsteady flow line integral convolution, its extension to time-varying volume flows, advanced evenly spaced streamline placement, and interactive view-driven evenly spaced streamline placement. Also introduced are four systems, i.e., ActiveLIC, ActiveIBFV, ActiveFLOVE, and DOXIV, which we developed for high-performance flow visualization coupled with applications to demonstrate the practical applicability. © 2016 by Begell House, Inc.

关键词： Data visualization

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Synthesizing and visualizing symmetric flows

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Journal of Flow visualization and Image Processing 2016年第3-4期23卷 253-273页

There are frequent user studies in flow visualization for comparing different algorithms in the effectiveness. While much work is focused on statistical analysis of the collected results, considerable bias arising from both flow data and task design is seldom addressed, compromising and even invalidating the subsequent conclusion. This paper presents topology-based synthesis of symmetric flows for explicit data generation, which then facilitates implicit task design, so as to enable convincing user studies. This method can produce a large number of (x-/y-/center-)symmetric flows with different structures but with nearly the same degree of topological complexity, and geometrically symmetric yet topologically asymmetric flows. The wide variety of topological constitution requires local + global visual perception, comprehensive feature recognition, and discreet pattern classification to gain a proper understanding of such symmetric and asymmetric flows. To visualize these flows, we propose to use a set of representative techniques including sparse geometry-based methods (i.e., arrow plots and evenly spaced streamlines) and dense texture-based approaches (i.e., three variants of line integral convolution) coupled with two color map schemes (i.e., rainbow band and color wheel). This selection, out of a broad range of candidate techniques, is based on thorough investigation of the working mechanisms, in-depth analysis of perceptual factors, and extensive observation of the advances in flow visualization. Thus, the rationale helps identify strengths and weaknesses of the existing flow visualization methods and provides hints for designing new effective algorithms. © 2016 by Begell House, Inc.

关键词： Flow visualization

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