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Annual Conference of the Canadian-Society-for-Civil-Engineering (CSCE)

作者： Sejkot, Petr Iqbal, Asif Czech Tech Univ Prague Czech Republic Univ Northern British Columbia Prince George BC Canada

ISBN: (纸本)9783031615337;9783031615313;9783031615306

Reinforced angle brackets are commonly used as connectors in wood structures. These connectors are typically installed with ring shank nails or screws. This paper presents the experimental results of cross-laminated timber (CLT) connections which consist of reinforced angle brackets and heavy-duty screws. These screws are one of the stiffest and the strongest options for the fasteners which can be used with the reinforced angle brackets. However, this option has not been extensively studied by many scholars yet. Therefore, this paper contains detailed numerical simulations with aim to be able to predict the failure modes and the load-bearing capacities of experimentally tested connections. Benefits together with the limitations of the presented numerical method are discussed.

关键词： Timber connections Angle brackets Screws Numerical simulation Full-scale tests python scripting

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Teaching Wild Horses to Sing: Managing the Deluge of Electronic Serials

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Serials Librarian 2013年第1-4期64卷 99-104页

作者： Ogier, Andrea Lynn Sechler, Michael W. Aschmann, Althea University Libraries at Virginia Tech VA United States Randolph College Lynchburg VA United States

When the sheer volume of incoming electronic serials threatened to overwhelm us in the University Libraries at Virginia Tech, we embraced the opportunity to examine our entire e-serials management system and options for utilizing services provided by vendors. This resulted in the formation of a collaborative task force composed of people from serials management and cataloging. We describe our process of implementing a vendor supplied service, the ways in which the MARC [machine-readable cataloging] record service changed the way we manage serials cataloging and holdings records for electronic journals, and the way in which some simple scripting in python helped us overcome some significant obstacles. © 2013 Copyright The North American Serials Interest Group, Inc.

关键词： batch loading electronic serials management MARC record service (MRS) python scripting record quality vendor supplied cataloging

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Balancing Detection Speed and Resource Efficiency in Healthcare Vulnerability Scanning 29

Balancing Detection Speed and Resource Efficiency in Healthc...

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29th IEEE Symposium on Computers and Communications (IEEE ISCC)

作者： Belghith, Aymen Saudi Elect Univ Comp Sci Dept Riyadh Saudi Arabia

ISBN: (纸本)9798350354249;9798350354232

Vulnerable systems are a prime target for cyberattacks in healthcare organizations. This paper explores how automatic vulnerability scanning, triggered by network changes through python scripting, can significantly reduce the window of opportunity for attackers. We delve into the crucial yet challenging task of finding the optimal scan frequency, balancing faster detection of vulnerabilities with minimized resource consumption on healthcare networks. A risk- based framework is presented to guide this selection process. Furthermore, we address the issue of false positives in Network Traffic Analysis (NTA) and propose mitigation strategies to enhance the accuracy of threat detection. By implementing these recommendations, healthcare organizations can establish a proactive approach to network security, safeguarding sensitive patient data and ensuring the continuity of critical healthcare services.

关键词： Healthcare Network Security Automatic Vulnerability Scanning python scripting Network Traffic Analysis (NTA) Risk-Based Scanning Frequency

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Hosting Capacity: A Tool for Modernizing the Grid 7

Hosting Capacity: A Tool for Modernizing the Grid

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7th IEEE Conference on Technologies for Sustainability (SusTech)

作者： Jensen, Brad Uyehara, Ryan Burns & McDonnell Kansas City MO 64114 USA

ISBN: (纸本)9781728131085

The U.S. power grid is undergoing a transformation. Operational focus is shifting away from utilities with large centralized generators at the transmission level and moving toward individual customers who contribute generation from distributed energy resources (DERs) at the distribution level Utility-scale renewable generation, meanwhile, continues to span across both transmission and distribution networks. The current interconnection process for small- to grid-scale DERs is well-defined, time-consuming and complex. It involves studying every DER application within a network model to identify its impacts on the network, both locally and systemwide. New technologies and applications are expanding the use cases for the capacity analysis approach. which is radically changing how interconnections are evaluated. Rather than focusing on individual DER connections, capacity analysis can allow you to study nearly every possible interconnection scenario. By identifying and understanding the ideal locations and usage times for DERs - and optimizing operating conditions - capacity analysis is making faster approvals and interconnections. as well as higher DER penetration, possible. This presentation will cover recent implementations of capacity analysis performed for Southern California Edison.

关键词： DER Studies Distribution Planning Hosting Capacity EV Planning python scripting

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ABAQUS plug-in finite element tool for designing and analyzing lattice cell structures

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ADVANCES IN ENGINEERING SOFTWARE 2022年 169卷

作者： Fadeel, Abdalsalam Abdulhadi, Hasanain Srinivasan, Raghavan Mian, Ahsan Wright State Univ Dept Mech & Mat Engn 3640 Colonel Glenn Hwy Dayton OH 45435 USA

This paper presents the development of a lattice structure design (LSD) tool for building and analyzing different configurations of 3D-printed lattice structure (LS). This tool was developed via ABAQUS graphical user interface (GUI) based on python code. Due to the extensive research activities in the field of lattice design using experimental and computational methods, there is a high demand for finding new techniques to reduce the computational time and human effort. Also, several challenges were revealed while creating finite element models for lattices of complicated geometries. These models showed the capability for capturing the elastic and inelastic mechanical responses of LSs during the compression test. Consequently, the LSD tool was designed not only to build lattice structures in a short time and simple way, but also to analyze the associated compressive mechanical behavior that goes beyond initial yielding to cover the entire crushing behavior. This paper examined many challenges involved in generating and decomposing the lattice geometry, creating hexahedron elements and optimizing the mesh density, assigning and inserting the material type, activating the face recognition to define the boundary and loading conditions, and conducting linear and polar patterns. Finally, to demonstrate the effectiveness of the new approach in designing and analyzing LSs, finite element results were validated with the previous experimental findings.

关键词： 3D-printed lattice structures Finite element modeling ABAQUS plugin tools Graphical user interface python scripting

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An innovative, fast method for landslide susceptibility mapping using GIS-based LSAT toolbox

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ENVIRONMENTAL EARTH SCIENCES 2021年第6期80卷 217-217页

作者： Polat, Ali Prov Directorate Disaster & Emergency Management TR-58050 Sivas Turkey

In this study, landslide susceptibility maps (LSM) of the Akincilar region were produced with the methods of frequency ratio (FR), information value (IV), logistic regression (LR), random forest (RF), and multi-layer perceptron (MLP) by using a new GIS-based toolbox (LSAT, Landslide Susceptibility Assessment Tool). LSAT was used to assess the landslide susceptibility of the Akincilar region located 150 km northwest of Sivas city (Turkey). LSM was successfully constructed using five different methods for the study area. Area under the curve (AUC) values were calculated as 70.95%, 71.85%, 72.57%, 72.67%, 73.93% for prediction rate of FR, IV, LR, MLP and RF methods, respectively. Time-consuming processes are one of the significant problems of constructing LSM. LSAT can be used easily in this type of study and minimizes such problems. Data preparation processes, visualization of modeling results, and accuracy assessment of LSM could very quickly and automatically be done thanks to this tool.

关键词： Landslide susceptibility python scripting Akı ncı lar Weka Geographic information system (GIS)

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FibrePlug-An ABAQUS plug-in for multi-scale modelling of textile composites

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COMPOSITE STRUCTURES 2023年第1期322卷

作者： Oyebanji, Jide Sun, Changze Saleh, Mohamed Nasr Krishnan, Kapil Guan, Zhongwei Adv Mat Res Ctr Technol Innovat Inst Abu Dhabi U Arab Emirates

In this paper, a plug-in - FibrePlug - developed within the ABAQUSTM Simple GUI (RSG) and Fox GUI development environments is introduced. In contrast to traditional meso-scale modeling, FibrePlug provides an advanced user-friendly environment for simultaneously modeling fibers at micro- and meso-scales. With FibrePlug, the yarn level fabrics may be replaced by a specific user-defined number of representative bundles also known as virtual fibers. Further customizations, including the modification of the number of virtual fibers, are available within the GUI. In addition to the FibrePlug's microscale modeling capabilities, readers are also introduced with the beam and solid element discretization features within the plug-in and their implications to computational efficiencies. The feature of the plug-in's hybrid multi-scale model generation is also demonstrated. Furthermore, the accuracy of a uniform beam-element model generated with FibrePlug is validated by simple tensile tests performed with the 3D DIC equipment. Despite noticeable deviations in mechanical properties with respect to traverse direction, these properties are satisfactorily predicted along the loading direction.

关键词： Multi-scale model Finite element analysis ABAQUS plug -in Textile composite python scripting

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Development of RiverBoxAn ArcGIS Toolbox for River Bathymetry Reconstruction

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WATER 2018年第9期10卷 1266-1266页

作者： Dysarz, Tomasz Poznan Univ Life Sci Dept Hydraul & Sanit Engn Ul Wojska Polskiego 28 PL-60637 Poznan Poland

The main purpose of the present research is to develop software for reconstruction of the river bed on the basis of sparse cross-section measurements. The tools prepared should support the process of hydrodynamic model preparation for simulation of river flow. Considering the formats of available data and the requirements of modern modeling techniques, the prepared software is fully integrated with the GIS environment. The scripting language python 2.7 implemented in ArcGIS 10.5.1 was chosen for this purpose. Two study cases were selected to validate and test the prepared procedures. These are stream reaches in Poland. The first is located on the Warta river, and the second on the Ner river. The data necessary for the whole procedure are: a digital elevation model, measurements of the cross-sections in the form of points, and two polyline layers representing an arbitrary river centerline and river banks. In the presented research the concept of a channel-oriented coordinate system is applied. The elevations are linearly interpolated along the longitudinal and transversal directions. The interpolation along the channel is implemented in three computational schemes linking different tools available in ArcGIS and ArcToolbox. A simplified comparison of memory usage and computational time is presented. The scheme linking longitudinal and spatial interpolation algorithms seems to be the most advantageous.

关键词： river bathymetry channel-oriented interpolation ArcGIS toolbox python scripting application of GIS for modeling of river flow

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Assessing the accuracy and efficacy of multiscale computational methods in predicting reaction mechanisms and kinetics of SN2 reactions and Claisen rearrangement

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SCIENTIFIC REPORTS 2024年第1期14卷 1-13页

作者： Dehabadi, Maryam Haji Saidi, Hamid Zafari, Faezeh Irani, Mehdi Univ Kurdistan Dept Chem Sanandaj *** Iran

This study investigates the application of quantum mechanical (QM) and multiscale computational methods in understanding the reaction mechanisms and kinetics of S(N)2 reactions involving methyl iodide with NH2OH and NH2O-, as well as the Claisen rearrangement of 8-(vinyloxy)dec-9-enoate. Our aim is to evaluate the accuracy and effectiveness of these methods in predicting experimental outcomes for these organic reactions. We achieve this by employing QM-only calculations and several hybrids of QM and molecular mechanics (MM) methods, namely QM/MM, QM1/QM2, and QM1/QM2/MM methodologies. For the S(N)2 reactions, our results demonstrate the importance of explicitly including solvent effects in the calculations to accurately reproduce the transition state geometry and energetics. The multiscale methods, particularly QM/MM and QM1/QM2, show promising performance in predicting activation energies. Moreover, we observe that the size of the MM active region significantly affects the accuracy of calculated activation energies, highlighting the need for careful consideration during the setup of multiscale calculations. In the case of the Claisen rearrangement, both QM-only and multiscale methods successfully reproduce the proposed reaction mechanism. However, the activation free energies calculated using a continuum solvation model, based on single-point calculations of QM-only structures, fail to account for solvent effects. On the other hand, multiscale methods more accurately capture the impact of solvents on activation free energies, with systematic error correction enhancing the accuracy of the results. Furthermore, we introduce a python code for setting up multiscale calculations with ORCA, which is available on GitHub at https://***/iranimehdi/pdbtoORCA.

关键词： Multiscale modeling ORCA software QM/MM Reaction mechanism python scripting

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Design and Optimization of a Composite Canard Control Surface of an Advanced Fighter Aircraft under Static Loading

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CURVED AND LAYERED STRUCTURES 2015年第1期2卷 91-105页

作者： Shrivastava, Sachin Mohite, P. M. Indian Inst Technol Kanpur Dept Aerosp Engn Kanpur 208016 Uttar Pradesh India

The minimization of weight and maximization of payload is an ever challenging design procedure for air vehicles. The present study has been carried out with an objective to redesign control surface of an advanced allmetallic fighter aircraft. In this study, the structure made up of high strength aluminum, titanium and ferrous alloys has been attempted to replace by carbon fiber composite (CFC) skin, ribs and stiffeners. This study presents an approach towards development of a methodology for optimization of first-ply failure index (FI) in unidirectional fibrous laminates using Genetic-Algorithms (GA) under quasi-static loading. The GAs, by the application of its operators like reproduction, cross-over, mutation and elitist strategy, optimize the ply-orientations in laminates so as to have minimum FI of Tsai-Wu first-ply failure criterion. The GA optimization procedure has been implemented in MATLAB and interfaced with commercial software ABAQUS using python scripting. FI calculations have been carried out in ABAQUS with user material subroutine (UMAT). The GA's application gave reasonably welloptimized ply-orientations combination at a faster convergence rate. However, the final optimized sequence of ply-orientations is obtained by tweaking the sequences given by GA's based on industrial practices and experience, whenever needed. The present study of conversion of an all metallic structure to partial CFC structure has led to 12% of weight reduction. Therefore, the approach proposed here motivates designer to use CFC with a confidence.

关键词： Control Surface Failure Index Optimization Weight Reduction Genetic-Algorithm python scripting

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