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Centroidal Voronoi Tessellation With Local Optimization, Tianyu Ye, Yiqun Wang, Dongming Yan, Junhai Yong Feb 2019

Centroidal Voronoi Tessellation With Local Optimization, Tianyu Ye, Yiqun Wang, Dongming Yan, Junhai Yong

Journal of System Simulation

Abstract: Centroidal Voronoi tessellation is a special geometric structure, which has many applications in various fields such as geographical information system, signal processing, mesh generation/optimization, visualization and so on. Due to the highly non-convex nature of the CVT energy function, the existing methods for computing CVT have several drawbacks, which always trap into local minima. We propose generation optimization and stochastic optimization schemes for further reducing the CVT energy. Experimental results show that the proposed method improves both quality and efficiency compared to the recent approaches.

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Satellite Formation Keeping And Its Stability Analysis Based On Artificial Potential Field Method, Shengqing Yang, Wenyu Ye, Yubin He, Yabin Wan Feb 2019

Satellite Formation Keeping And Its Stability Analysis Based On Artificial Potential Field Method, Shengqing Yang, Wenyu Ye, Yubin He, Yabin Wan

Journal of System Simulation

Abstract: In this paper, a control method of satellite formation keeping is investigated based on artificial potential field. Since the N-body problem doesn’t have analytical solutions, a leader-follower formation is proposed as a restricted N-body problem. The stable structure has infinite possible pairs of coordinates in the inertial frame, therefore the Jacobian matrix of the corresponding error dynamic system at the equilibrium point is unsolvable. By introducing a transformation of coordinates from inertial frame to a specific reference frame, the stability analysis of error dynamic system is only related to the structure of formation. By the reduction of error …

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Structure Optimization Analysis Of Distillation Kettle Based On Elastic-Plastic Mechanics, Xiaodong Hu, Liu Ning, Xiangsong Qi, Jianpeng Wang Feb 2019

Structure Optimization Analysis Of Distillation Kettle Based On Elastic-Plastic Mechanics, Xiaodong Hu, Liu Ning, Xiangsong Qi, Jianpeng Wang

Journal of System Simulation

Abstract: Based on the analysis of structural strength by elastic mechanics, there is a large stress singularity due to the discontinuity of the equipment structure, which makes the calculation result not consistent with the actual stress of the equipment. According to the actual design and structure of a distillation reactor, based on the theory of elastic-plastic mechanics, through modeling, meshing, loading and constraint analysis, the stress distribution of distillation kettle is analyzed; and the wall thickness and stiffener structure are optimized. The results show that the calculation results are reliable and the design of wall thickness is smaller than the …

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Design Of An Energy-Aware Enhanced Cooperative Mac Protocol In Mobile Ad Hoc Networks, Jaeshin Jang, Balasubramaniam Natarajan Feb 2019

Design Of An Energy-Aware Enhanced Cooperative Mac Protocol In Mobile Ad Hoc Networks, Jaeshin Jang, Balasubramaniam Natarajan

Journal of Marine Science and Technology–Taiwan

In this paper, we present a new energy-efficient cooperative MAC protocol, called the e2 BT-COMAC protocol for mobile ad hoc networks, and evaluate its performance. In the proposed MAC protocol, which is an enhanced version of our previous eBT-COMAC protocol, a cross-layer energy-aware strategy for cooperative communication is employed using mobile nodes. Considering a random waypoint mobility model for all mobile nodes, we compare the system throughput and network lifetime of the e2 BT-COMAC protocol with previously proposed cooperative MAC protocols. Using a new metric that is a weighted combination of normalized system throughput and lifetime, we determine optimal values …

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Evaluating The Costs And Benefits Of A Smart Contract Blockchain Framework For Credit Default Swaps, Ryan Clements Feb 2019

Evaluating The Costs And Benefits Of A Smart Contract Blockchain Framework For Credit Default Swaps, Ryan Clements

William & Mary Business Law Review

Despite wide speculation about its use-value, there are very few large-scale Blockchain implementations, particularly in sophisticated financial applications and mature markets. The extent of Blockchain’s disruptive potential in these domains is uncertain. This Article considers Blockchain’s use-value for credit default swap contract execution, fulfillment, and post-trade processing by using, as an assessment base, a series of derivative industry whitepapers, academic and technological evaluative studies, and commentary relating to current market undertakings. In summary, when applied to credit default swaps, there are many barriers to implementation, as well as costs, fragmentation risks, technological deficiencies, and practical drawbacks. As a result, there …

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Removal Without Approval? Corporate Litigative Authority To Consent To Federal Removal Where Adverse Parties Are Co-Equal Shareholder Co-Directors, James M. Mcclure Feb 2019

Removal Without Approval? Corporate Litigative Authority To Consent To Federal Removal Where Adverse Parties Are Co-Equal Shareholder Co-Directors, James M. Mcclure

William & Mary Business Law Review

The Case of Swart v. Pawar involved a novel question of law: can a president of a corporation claim authority on behalf of that corporation to consent to federal removal in a suit against a co-equal shareholder co-director even though that president lacks board approval or explicit authority from the business’s bylaws or charter? To address this question, the parties in Swart analogized removal to suit initiation and defense. Since the federal courts hearing the case did not assess the validity of these analogical arguments or a president’s removal authority generally, this Note evaluates the analogies as well as several …

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Classifying Private Landowners To Improve Understanding Of Management Decisions And Conservation Opportunities In Urbanizing Forested Landscapes, Jessica A. Balukas, Kathleen P. Bell, Dana Marie Bauer Feb 2019

Classifying Private Landowners To Improve Understanding Of Management Decisions And Conservation Opportunities In Urbanizing Forested Landscapes, Jessica A. Balukas, Kathleen P. Bell, Dana Marie Bauer

Economics

Viewed as coupled natural and human systems, urbanizing forested landscapes exhibit fascinating and complex dynamics, where landowner decisions and biophysical processes together influence conservation and development outcomes. To improve understanding of land management decisions and conservation opportunities on private lands in these landscapes, we developed a landowner typology that accounts for heterogeneity among landowners that goes beyond ownership objectives and investigated its usefulness in predicting individual private landowners' stated intentions to implement diverse land management actions. Using survey responses collected from private landowners in two metropolitan areas in Maine, USA, we focused on understanding differences in owners' stated likelihood of …

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James Porter, February 15, 2019, Matt Jones, Mia Colavito Feb 2019

James Porter, February 15, 2019, Matt Jones, Mia Colavito

Oral Histories

Dr. James Porter began his tenure with the Eastern Michigan University Department of Astronomy and Physics in 1968, a particularly tumultuous time for the University. Witness to many student protests and the local law enforcement response to them, Porter shares his perspective on a changing university and the community surrounding it. Porter received Emeritus status when he retired in 2008.

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Experimental Study: Underwater Propagation Of Super-Gaussian And Multi-Gaussian Schell-Model Partially Coherent Beams With Varying Degrees Of Spatial Coherence, Svetlana Avramov-Zamurovic, Charles L. Nelson, Milo W. Hyde Iv Feb 2019

Experimental Study: Underwater Propagation Of Super-Gaussian And Multi-Gaussian Schell-Model Partially Coherent Beams With Varying Degrees Of Spatial Coherence, Svetlana Avramov-Zamurovic, Charles L. Nelson, Milo W. Hyde Iv

Faculty Publications

We report on experiments where super-Gaussian and flat-top, multi-Gaussian Schell-model spatially partially coherent beams, with varying degrees of spatial coherence, were propagated underwater. Two scenarios were explored—calm and mechanically agitated water. The main objective of our study was the experimental comparison of the scintillation statistics. For a similar degree of coherence widths, the results show a potentially improved performance of scintillation index for the multi-Gaussian Schell-model beams as compared to the super-Gaussian beams. It should be noted that the presented results pertain only to the given experimental scenarios and further investigation is necessary to determine the scope of the findings.

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Application Of Random Geometric Imperfection Method To Nonlinear Buckling Analysis Of Spherical Shell, Zhixin Xiong, Zhiquan Huang, Xiaochuan Yu Feb 2019

Application Of Random Geometric Imperfection Method To Nonlinear Buckling Analysis Of Spherical Shell, Zhixin Xiong, Zhiquan Huang, Xiaochuan Yu

Journal of Marine Science and Technology–Taiwan

This paper focuses on spherical shells with random geometric imperfections under uniform external pressure. An extensive numerical investigation is performed to calculate the buckling loads of perfect and imperfect spherical shells. To discuss the effects of initial geometric imperfections, a finite element analysis model of the perfect spherical shell is considered to obtain its first 60 modes. Then, the consistent imperfect buckling analysis method is applied to analyze the nonlinear stability of the spherical shells with geometric imperfections. The shapes of the shell in the 1st to 20th eigenmode are considered. A lower buckling load is found corresponding to the …

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Rectangle-Based Approaches For Representing Flood Data In Spatial Indices, Ya-Hui Chang, Wen-Han Lee, Tai-Feng Ke Feb 2019

Rectangle-Based Approaches For Representing Flood Data In Spatial Indices, Ya-Hui Chang, Wen-Han Lee, Tai-Feng Ke

Journal of Marine Science and Technology–Taiwan

Appropriate representation of flood data in indices is crucial for efficient future querying. A common approach is to use minimum bounding rectangles to build R-tree indices rather than storing real complex objects; however, the results may be imprecise. Herein, to improve the performance of this approach, we discuss methods for producing corresponding rectangles. The first method involves generating a set of small fixed-sized squares, and the second one attempts to initially obtain a large rectangle. The third approach recursively partitions the space into four quadrants until the given size constraint is satisfied. Experimental results based on the real flood data …

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Flipster: A New Way To Access Digital Magazines, Tina Beis Feb 2019

Flipster: A New Way To Access Digital Magazines, Tina Beis

University Libraries Blog Archive

University of Dayton students, faculty and staff can now access a variety of popular magazines digitally using the Libraries' subscription to Flipster, a next-generation magazine service.

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Volume Cxxxvi, Number 15, February 15, 2019, Lawrence University Feb 2019

Volume Cxxxvi, Number 15, February 15, 2019, Lawrence University

The Lawrentian

No abstract provided.

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Uncut, Unfiltered ... But Not Necessarily Uninterrupted, Scott N. West Feb 2019

Uncut, Unfiltered ... But Not Necessarily Uninterrupted, Scott N. West

University Libraries Blog Archive

Hurricane response, an immigrant 'caravan,' the Dayton Accords and more in Scott West's latest dispatch from government documents.

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Becoming A Nurse: Building Student Leadership, Self-Efficacy, And Clinical Reasoning, Shannon Lanctot-Shah, Susan P. Hackett Feb 2019

Becoming A Nurse: Building Student Leadership, Self-Efficacy, And Clinical Reasoning, Shannon Lanctot-Shah, Susan P. Hackett

Creating Healthy Work Environments (CHWE)

This innovative project supports novice nursing students through to newly graduated registered nurses. Key skill development include self-efficacy, leadership, professional development, interprofessional practice and self-care. This research informs the workbook Becoming a Nurse to support nursing students across North America to prepare for high stakes exams and transition into practice.

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Improving Patient-Centered Diabetes Care In A Nurse Practitioner-Led Clinic: A Qi Project, Tarnia Newton Feb 2019

Improving Patient-Centered Diabetes Care In A Nurse Practitioner-Led Clinic: A Qi Project, Tarnia Newton

Creating Healthy Work Environments (CHWE)

A quality improvement project to improve patient centered standardization of diabetes care in a chaotic Nurse Practitioner Led clinic. That resulted in increased patient centered standardized care for diabetic patients. This project highlights that a team has significant power for achieving better diabetes outcomes.

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Transformational Change: A Shift To A Healthy Work Environment Throughout Nursing Academia, Donna Carazzone, Sylvia Colon Cabassa Feb 2019

Transformational Change: A Shift To A Healthy Work Environment Throughout Nursing Academia, Donna Carazzone, Sylvia Colon Cabassa

Creating Healthy Work Environments (CHWE)

Schools of Nursing are continuously working on ways of offering and facilitating positive learning experiences for their nursing students This paper will introduce steps that will help nursing faculty in making the paradigm shift that will develop a healthy work environment enhancing caring, collaboration, and self-care for their students.

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Raising The Bar: Advancing Expertise At The Bedside, Kate J. Williams-Ashman Feb 2019

Raising The Bar: Advancing Expertise At The Bedside, Kate J. Williams-Ashman

Creating Healthy Work Environments (CHWE)

To advance professionalism and expertise at the bedside the organization invested in a certification program focusing on removing identified barriers and using a peer-to-peer mentorship model to motivate, encourage, and support nurses embarking on the certification journey.

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Using Skilled Nurse Communication To Curb Patient Aggression: Findings From A Quality Improvement Project, Scott S. Christensen, Laura Adams, Barbara L. Wilson Feb 2019

Using Skilled Nurse Communication To Curb Patient Aggression: Findings From A Quality Improvement Project, Scott S. Christensen, Laura Adams, Barbara L. Wilson

Creating Healthy Work Environments (CHWE)

With aggressive patient encounters becoming more common in non-mental health settings, one large academic medical center created a safer patient care environment by implementing a Behavioral Emergency Response Team (BERT) program. Project findings are relevant for identifying nurse communication gaps, building nurse communication skills, and mitigating patient aggression toward nurses.

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Using Appreciative Inquiry To Decrease Incivility And Promote A Healthy Work Environment: A Literature Review, Kelly C. Tomlinson, David P. Hrabe, Joyce Zurmehly, Barbara Warren Feb 2019

Using Appreciative Inquiry To Decrease Incivility And Promote A Healthy Work Environment: A Literature Review, Kelly C. Tomlinson, David P. Hrabe, Joyce Zurmehly, Barbara Warren

Creating Healthy Work Environments (CHWE)

Incivility is an issue in nursing that needs to be addressed. This is a literature review to find if there is evidence that appreciative inquiry could be an intervention to address incivility and help create a healthy work environment.

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Insight Into Faculty Perspectives Transitioning To Concept-Based Curriculum In Nursing Education, Tammy Martineau Feb 2019

Insight Into Faculty Perspectives Transitioning To Concept-Based Curriculum In Nursing Education, Tammy Martineau

Creating Healthy Work Environments (CHWE)

This qualitative research study explored faculty perspectives and experiences of full-time associate degree nursing faculty transitioning to a concept-based curriculum. The study revealed an influence on the personal and professional lives of faculty through two major themes identified in the findings.

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Two Sides To The Story: Utilizing Simulation To Improve Communication, Aliesha S. Emerson Feb 2019

Two Sides To The Story: Utilizing Simulation To Improve Communication, Aliesha S. Emerson

Creating Healthy Work Environments (CHWE)

Simulated scenarios were developed for Behavioral Health Nurses, who were to assess the decompensating medically acute psychiatric patient. Medical providers were behind the scenes unaware of the scenarios. By the nurses utilizing the SBAR communication format, partnership between members of the medical team as well as Nursing was vastly improved.

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February 2019, Randy Curry, Cindy Brooks Feb 2019

February 2019, Randy Curry, Cindy Brooks

RURAL ROCKS

Rural Rocks, the Rural Health Network newsletter by the SWOSU College of Pharmacy

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2019-February-15-In The Name Of Love, University Marketing And Communications, East Tennessee State University Feb 2019

2019-February-15-In The Name Of Love, University Marketing And Communications, East Tennessee State University

ETSU News

No abstract provided.

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Hand To Heart, Elizabeth Elward Feb 2019

Hand To Heart, Elizabeth Elward

Materials from the University of Dayton Magazine Website

On Valentine's Day, CPR kiosk training was held at RecPlex.

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Overview Of Image Segmentation And Registration For Spine Biological Modeling, Juping Gu, Tianyu Cheng, Hua Liang, Jianping Wang, Zhao Jian, Cao Yong Feb 2019

Overview Of Image Segmentation And Registration For Spine Biological Modeling, Juping Gu, Tianyu Cheng, Hua Liang, Jianping Wang, Zhao Jian, Cao Yong

Journal of System Simulation

Abstract: The prevalence of common spinal fractures is high in this day. Spinal image segmentation and registration are the key step and prerequisite of target recognition, biomechanical modeling and finite element analysis. They are also the key technology of noninvasive surgery navigation. Aiming at the problems of spinal image processing, the classical medical image segmentation and registration algorithm is introduced. It also analyzes the defects and prospects of the future development trend of spine image processing. The research results have certain significance for further understanding of spinal medical image processing and promoting the development of rehabilitation therapy for spinal fractures.

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Traffic Patterns For Intelligent Vehicles In The Intersection, Wang Jian, Feng Qi, Xiaowei Hu Feb 2019

Traffic Patterns For Intelligent Vehicles In The Intersection, Wang Jian, Feng Qi, Xiaowei Hu

Journal of System Simulation

Abstract: With the applications of GPS/DR/MM integrated positioning technology and vehicle infrastructure integration technology, three traffic patterns with which intelligent vehicles go through the intersection are put forward. These three traffic patterns include signal lights adaptive traffic pattern, vehicle self-organizing traffic pattern and vehicle infrastructure integration traffic pattern. They can reduce vehicle delay, avoid traffic conflicts, decrease the probability of traffic accidents, improve traffic efficiency and realize the barrier-free accessibility of intelligent vehicles to the intersection. According to the parameters such as vehicles arrival rate, critical velocity and the average vehicle spacing, a clearance movement model and a circular path …

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Modeling And Simulation Of Car-Following On Expressway, Yuhan Jia, Jianping Wu, Yiman Du, Mingyu Liu Feb 2019

Modeling And Simulation Of Car-Following On Expressway, Yuhan Jia, Jianping Wu, Yiman Du, Mingyu Liu

Journal of System Simulation

Abstract: Aiming at the high-speed following phenomenon on expressways, an improved car-following model is developed in the paper considering variable safety headway distance. The new model is calibrated and validated by the data collected using an instrumented vehicle in Beijing. Stability analysis of the new model is investigated using the control theory method. The numerical simulations are implemented and the result shows good consistency with theoretical study. The new model is integrated into the traffic simulation system of FLOWSIM. Experiment results show that the improved OV model based FLOWSIM can outperform the original system on some specific conditions.

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Evaluation Method Of Imminent Battle Situation In Air Combat, Huimin Cao, Anxiang Huang, Lei Xiang Feb 2019

Evaluation Method Of Imminent Battle Situation In Air Combat, Huimin Cao, Anxiang Huang, Lei Xiang

Journal of System Simulation

Abstract: In the state of air combat, the situation change rapidly. Quick and accurate assessment of the current situation and making decisions is the key to the victory of air combat and the preservation of own strength. Based on the specialty of the modern air battle and pelagic operation, this article adds the political factor, the pilot individual actual combat ability, and the formation cooperative tactical task to fight against the single constraint into the evaluation index system. This makes the evaluation more reasonable and comprehensive and closer to the actual combat, so as to provide more accurate basis for …

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3d Flight Trajectory Simulation Generator Based On Track Constraints, Shuguang Sun, Cheng Peng Feb 2019

3d Flight Trajectory Simulation Generator Based On Track Constraints, Shuguang Sun, Cheng Peng

Journal of System Simulation

Abstract: The airborne navigation equipment needs accurate flight trajectory data to test its performance. According to the requirements of the Beidou receivers, considering the constraint of trajectory and flight performance, a flight trajectory generator is designed using iteration like method. The flight trajectory generator can generate the whole trajectory data and the flight parameters of the aircraft based on the actual flight procedures, and display the data and parameters in real time. The whole flight trajectory simulation data from Beijing International Capital Airport to Guangzhou Baiyun International Airport is generated. The result shows that the flight trajectory generator can generate …

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