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The Perception of Sustainability in an Ethernet Network Cable: A Qualitative Analysis Using the AHP Method 32nd

The Perception of Sustainability in an Ethernet Network Cabl...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： dos Santos, Cleiton Ferreira Loures, Eduardo de Freitas Rocha Portela Santos, Eduardo Alves Pontif Catholic Univ Parana PUC PR Curitiba Parana Brazil Fed Univ Parana UFPR Curitiba Parana Brazil

ISBN: (纸本)9783031381645;9783031381652

Sustainability has been gaining focus in recent years in companies of different segments and sizes in order to create competitive advantages and differentiation in the market to maximize profit and opportunities. Sustainable innovation corroborates this concept in order to create products that have the theme of sustainability in their development. However, inmarkets where the source of rawmaterial comes from commodity products, this practice is not trivial. Thus, in an attempt to differentiate itself from competitors, a company developed a product with a "sustainable" vision, using polymer originating from ethanol (sugarcane). However, is this perception of sustainability transmitted to customers, partners and society? Therefore, this study uses the AHP multicriteria decision-making method to quantify the qualitative analyzes carried out. The results indicate that the sustainability message is transmitted, but at different levels (percentage of confirmation), and therefore, it is suggested that improvements/focuses be implemented in the marketing informational materials.

关键词： Sustainability Sustainable product Multicriteria decision AHP Ethernet networks

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Design of Personalized Orthoses with Support of PTC Creo and FDM Technology 8th

Design of Personalized Orthoses with Support of PTC Creo and...

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Torok, Jozef Vodilka, Adrian Kascak, Jakub Kocisko, Marek Tech Univ Kosice Fac Mfg Technol Bayerova 1 Presov 08001 Slovakia

ISBN: (纸本)9783031564581;9783031564567

The proposed research was focused on the development of a personalized wrist orthosis using PTC Creo for design and FDM technology for manufacturing. The innovation in this approach is the production of the orthosis in an unfolded state, which allows for faster and more efficient production with a lower risk of orthosis breakage due to insufficient adhesion of the layers. The design utilizes a 2.5D Octagonal lattice structure of 40 x 40 mm, rotated by 40 degrees, which contributes to the lightweight of the orthosis while maintaining its strength. Printing the orthosis in its unfolded state also significantly shortened the orthosis fabrication process by 47.78% compared to standard printing oriented normal to the build plate. After the physical model was fabricated, the orthosis was heated above glass transition temperature for 60 s and then formed directly onto the patient's hand, which took approximately 10 s. This forming process was considered simple and intuitive, as well as comfortable. The orthosis provided sufficient strength and the comfort of wearing it was positively assessed. Findings indicated increased orthosis integrity when printing in the unfolded state, a significant improvement over standard FDM printing. The benefits are innovative design, improved efficiency of the manufacturing process, and increased quality and wearing comfort of the brace. Suggested future research includes testing the durability of the brace with different thicknesses, comparing it with FEA analysis, and exploring the potential of using different materials and other types of lattice structures.

关键词： Orthosis personalized orthosis splint PTC Creo FDM 3D printing lattice

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Numerical Simulation of Capillary Waves: Comparative Study of Volume of Fluid and Level Set Methods 14th

Numerical Simulation of Capillary Waves: Comparative Study o...

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14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Mukim, Vineet Vishnu Giljarhus, Knut Erik Teigen Time, Rune Wiggo Rabenjafimanantsoa, Andrianifaliana Herimonja Univ Stavanger Dept Energy & Petr Engn Kjell Arholms Gate 41 N-4021 Stavanger Norway Univ Stavanger Dept Mech & Struct Engn & Mat Sci Kjell Arholms Gate 41 N-4021 Stavanger Norway

ISBN: (纸本)9783031666087;9783031666094

Linear wave theory establishes a relationship between the interfacial tension, viscosity, and capillary wave parameters such as wavelength and decay coefficient. This makes capillary waves an excellent non-intrusive tool for measuring fundamental properties of liquids. But these waves exhibit distinct length scales for their amplitude and wavelength posing significant challenges for numerical simulation. This study investigates numerical simulation methods, Volume of Fluid (VoF) and Level Set (LS), in the context of capillary waves. Both methods are widely used to simulate multiphase flows and differ mainly in numerical implementation and approaches of handling the interface. Accuracy of measuring wave properties heavily relies on precise and reliable interface capturing prompting the need for a comparative investigation. For this study, interIsoFoam (OpenFOAM) and Level Set (COMSOL Multiphysics) solvers are considered. Numerical experiments conducted for a range of parameters show that VoF (average error = 1.09%) performs better than LS (average error = 3.92%). Additionally, VoF provides superior results in other aspects of the wave, including amplitude and sinusoidal appearance. This study also validates linear wave theory in real-world scenarios with finite-amplitude and finite-depth waves with reflections.

关键词： capillary waves Volume of Fluid (VoF) Level Set (LS) interface capturing dynamic mesh motion

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Numerical Study on Vibration Characteristics of Non-pneumatic Tire Coupled with Quarter-Car Model 16th

Numerical Study on Vibration Characteristics of Non-pneumati...

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16th International Symposium on Advanced Vehicle Control

作者： Washimi, Yuta Suzuki, Takuma Okano, Toshihiko Sasaki, Kensuke Nissan Motor Co Ltd 1-1 Morinosatoaoyama Atsugi Kanagawa 2430123 Japan

ISBN: (纸本)9783031703942;9783031703928;9783031703911

Non-Pneumatic Tires are primarily recognized for their puncture-free attributes, particularly suitable for specialized vehicles. However, not only the advantages, but also vehicle characteristics such as noise, vibration, and harshness need to be considered in case of application to standard passenger cars. To address this, estimating the vibration characteristics of NPT, considering the nonlinear behavior of the tire and its interaction with other car components, is important for vehicle development and chassis control. In this study, tire finite element analysis combined with the multibody simulation of a quarter-car model is employed. The vibration characteristics of a passenger car equipped with NPT are investigated on a specific tire construction and a car model in comparison to a pneumatic tire. It was found that the NPT exhibits high-frequency characteristic vibrations, although the overall trend is qualitatively similar to that of the pneumatic tire when the vertical stiffness and the contact properties are set to be close to those of the pneumatic tire.

关键词： Non-pneumatic tire Cleat Impact Vibration Ride Comfort

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Material Parameters Identification of Thin Fiber-Based Materials Using the Method of Machine Learning Exploiting Numerically Generated Simulation Data 14th

Material Parameters Identification of Thin Fiber-Based Mater...

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14th International Conference on Numerical Methods in Industrial Forming Processes (NUMIFORM)

作者： Sanjon, Cedric Wilfried Leng, Yuchen Hauptmann, Marek Majschak, Jens-Peter Groche, Peter Fraunhofer Inst Proc Engn & Packaging IVV Heidelberger Str 20 D-01189 Dresden Germany Tech Univ Darmstadt Inst Prod Engn & Forming Machines PtU Otto Berndt Str 2 D-64287 Darmstadt Germany

ISBN: (纸本)9783031580086;9783031580062;9783031580055

The determination and validation of material parameters required for finite element simulation of the forming processes of fiber-based materials such as paper-board can be accomplished by strain-based loading of a specimen in combination with a simulation-based reverse engineering approach. Due to the complexity of the material itself, such as anisotropy, the development of such approaches can be very time-consuming and requires programming skills as well as expertise in FEM analysis and optimization. Machine learning methods offer a practical alternative to optimization, parameterization, and reverse engineering approaches, assuming that the data is fully known, generalized, and learned by the machine learning model. More specifically, a machine learning model can compute the material parameters required for a finite element simulation directly from the experimental measurements, if the hypothetical mapping function in this case is learned from the numerical study between material parameters and deformation behavior. In this paper, such data generated by numerical studies are used to train the machine learning model and, based on this, to determine elastic (e.g., Young's modulus), plastic, and Hill's parameters.

关键词： Finite element analysis Materials analysis Material parameters Material identification Machine learning

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Improved Methods for the Separation of Track and Wheel Noise Components During a Train Pass-By 14th

Improved Methods for the Separation of Track and Wheel Noise...

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14th International Workshop on Railway Noise (IWRN)

作者： Thompson, David Zhao, Dong Cierco, Ester Jansen, Erwin Dittrich, Michael Univ Southampton Inst Sound & Vibrat Res Southampton SO17 Hants England Ingn El Control Ruido SL Berruguete 52 Barcelona 08035 Spain TNO Acoust & Sonar Oude Waalsdorperweg 63 NL-2597 AK The Hague Netherlands

ISBN: (纸本)9789819978519;9789819978526

Experimental techniques are described that aim to allow the wheel and track components of rolling noise to be separated from pass-by measurements. These are based on Advanced Transfer Path Analysis, Pass-by Analysis, and a method based on the TWINS model. Improvements to these methods and their experimental validation using field tests are described. Initial comparisons are made for two test cases, a metro train running at 60 km/h and a regional train running at 80 km/h. The three methods agree reasonably well in terms of overall trends. The largest differences are found at low frequencies where the two experimental methods give similar levels for sleeper and rail vertical components whereas the TWINS model gives a larger distinction between them.

关键词： Rolling noise Source separation Pass-by tests

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A Human-Robot Collaboration Workstation Design to AssessWorker Physical Workload with JACK Software 8th

A Human-Robot Collaboration Workstation Design to AssessWork...

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Ulutas, Berna Yetkin, Busra Nur Eskisehir Osmangazi Univ Dept Ind Engn Fac Engn & Architecture TR-26480 Eskisehir Turkiye

ISBN: (纸本)9783031564581;9783031564567

Collaborative robots present promising solutions to partial automation of assemblyworkstations to combine theworkers' flexibility and robots' capability to apply force and speed. To assess and visualize the time-relatedwork characteristics, models can be generated. Digital human modelling (DHM) enables to design and analyze motions, required time, and several ergonomic assessments through developing simulation models. In this study, a Human-Robot Collaboration (HRC) system is built using Siemens JACK software. Three different scenarios are developed for a gear pump assembly workstation to compare the physical workload of the worker when different number of cobots are utilized. Furthermore, other objective parameters like productivity and cycle time as an outcome of the human-robot task allocation are calculated within the software. The presented approach demonstrates the advantages of the collaborative work between the worker and the cobot in a shared workplace and evaluate different allocations of the tasks. The results reveal significant improvements for worker' conditions in terms of several physical workload aspects and productivity when certain assembly tasks are assigned to cobots.

关键词： Digital human modelling (DHM) Human Robot Collaboration (HRC) Simulation Assembly

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Turbulent Heat Flux Modelling by Using Elliptic-Blending k-ε-ζ-f RANS Model

Turbulent Heat Flux Modelling by Using Elliptic-Blending k-...

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Saudi International Conference on Nuclear Power engineering (SCOPE)

作者： Hadziabdic, Muhamed Hodza, Ammar Niceno, Bojan Int Univ Sarajevo Hrasnicka Cesta 15 Sarajevo 71000 Bosnia & Herceg Paul Scherrer Inst Sci Comp Theory & Data CH-5232 Villigen Switzerland

ISBN: (纸本)9783031643613;9783031643620

We report the results for two buoyancy-driven benchmark cases, heatdriven square cavity at Ra = 10(11), and Rayleigh- Benard convection at Ra = 10(9), by using the elliptic-blending eddy viscosity k-epsilon-zeta-f model (or just-f), and three different formulations of the turbulent heat flux, namely the Simple Gradient Diffusion Hypothesis (SGDH), the General Gradient Diffusion Hypothesis (GGDH) and the Algebraic heat Flux Model (AFM). The zeta-f model is well-posed for computing turbulent heat transfer since it contains an approximation of the normal Reynolds stress in the wall-normal direction that is needed in GGDH and AFM formulations. Furthermore, the modelling of the wall-blocking effect by using the elliptic-relaxation approach is physically more sound than the commonly used damping functions. This work is motivated by the recently held 17(th) ERCOFTAC SIG15/MONACO2025 workshop on turbulent natural convection flows in differentially heated cavities, [1], which demonstrated superior performance of the zeta-f model in predicting the main flow features for the selected cases.

关键词： Turbulent Heat Flux RANS Turbulent Heat Convection

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On Applicability of Local Inertia Model for Integrated Surface-Subsurface Flow Systems 23rd

On Applicability of Local Inertia Model for Integrated Surfa...

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2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Kumar, Alok Pahar, Gourabananda Indian Inst Technol Kanpur Dept Civil Engn Kanpur 208016 Uttar Pradesh India

ISBN: (纸本)9789819760084;9789819760091

Interaction between surface water and groundwater is observed in all-natural water bodies such as lakes and ponds and coastal areas. This complex interaction of fluid and the porous media can be resolved in three-dimensional models with significant accuracy, however, with humongous computational overhead. Very few unified surface and groundwater flow models exist in the literature, where a single set of equations can describe such flows. The current study considers a single set of conservation laws for flow in/outside of porous media obtained from the volume-averaging and then subsequent depth-averaging of the three-dimensional conservation laws. Further simplifications based on the assumption that inertial effects in these flows are very small leads to the development of the current local inertia model (LIM). LIM conceptualization of the flow significantly reduces the computational overhead compared to diffusive wave models, signaling potential extension to the real-time scenarios. The resulting model is solved using an augmented approximate Riemann solver [Harten, Lax, and Leer (HLL) method]. The potential applicability of the model is tested against different representative scenarios (such as vertical and inclined interfaces).

关键词： Surface water Groundwater LIM

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The Prospect of Nuclear Power Integrated Desalination Plants in Saudi Arabia

The Prospect of Nuclear Power Integrated Desalination Plants...

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Saudi International Conference on Nuclear Power engineering (SCOPE)

作者： Alsubhi, Abdulaziz Balabaid, Abdallah Al-Qahtani, Khaled Al-Gazlan, Osamah Shams, Afaque Al-Athel, Khaled King Fahd Univ Petr & Minerals KFUPM Dhahran 31261 Saudi Arabia KFUPM Interdisciplinary Res Ctr Adv Mat IRC AM Dhahran 31261 Saudi Arabia KFUPM Interdisciplinary Res Ctr Ind Nucl Energy IRC INE Dhahran 31261 Saudi Arabia

ISBN: (纸本)9783031643613;9783031643620

Despite the amount of water on our planet, water scarcity is a crucial problem facing the world. Thus, many countries resort to seawater desalination to solve this problem. Some of the most popular desalination technologies in the world are Reverse Osmosis desalination (RO), Multi Effect Desalination (MED) and Multi-Stage Flash desalination (MSF). These technologies are operated by heat and electricity, which are conventionally provided through fossil fuels. The world's largest desalinated water producer by a significant margin is Saudi Arabia. Consequently, with the prospect of reducing the dependence on fossil fuels and shifting to more environmentally friendly sources, nuclear desalination will be a contributing factor. This study discusses the process of coupling Nuclear Power Plants (NPPs) with RO desalination plants in Saudi Arabia. As well as provide valuable recommendations to utilize the country's new nuclear ventures in its already existing desalination infrastructure.

关键词： Desalination Vision 2030 Nuclear energy Reverse Osmosis Development Economy Environment

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