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Journal articles on the topic 'FDM Service'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Shemelyunas, S. S., A. V. Drobotov, and D. V. Samoylov. "SERVICE FUNCTIONS AUTOMATION IN FDM 3D PRINTER." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 3(250) (March 26, 2021): 78–82. http://dx.doi.org/10.35211/1990-5297-2021-3-250-78-82.

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The article discusses systems for automatic removal and retrieval of printed products, as well as control systems for material supply in FDM 3D printers. The process of the module software for ensuring the functioning of these systems in a software and hardware integrated 3D printer is described. The capabilities of the developed module and the ways of its application in modern additive manufacturing are described.

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Deng, Xianzheng, Xin Bian, and Mingqi Li. "LDM-Ex-FDM: A Novel Multi-Service Transmission Scheme for the ATSC 3.0 System." Applied Sciences 11, no. 7 (2021): 3178. http://dx.doi.org/10.3390/app11073178.

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In order to improve system coverage performance, in this paper, a multi-service transmission scheme on the basis of the puncturing technique, namely layered division multiplexing extension frequency-division multiplexing (LDM-Ex-FDM), is proposed. The key idea of the proposed scheme is that the symbols punctured from the enhanced layer (EL) of fixed services will be independently transmitted on a certain number of subcarriers orthogonal to the LDM signal of the core layer (CL) and most of the EL. By doing so, the punctured symbols will be demodulated with a higher signal-to-noise ratio (SNR) o

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Shen, Hsu-Ming, Kung-Jen Tu, and Ting-Yi Chiang. "ESTABLISH A CUSTOMER PROPERTY SERVICE STRATEGY FRAMEWORK." International Journal of Strategic Property Management 25, no. 3 (2021): 204–2015. http://dx.doi.org/10.3846/ijspm.2021.14568.

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The property management services sector in China is developing rapidly, contributing significantly to employment and income. We have made recommendations for service differentiation and low costs so that even with limited resources, property management services can distribute their services effectively, reduce unnecessary costs, and implement an optimal plan. This study helps property management service providers understand the needs and expectations of customers because it is a key factor contributing to the success of the business. Based on the consumer and service quality (SERVQUAL) theorie

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Rahman, Nik Hisamuddin, and Tuan Hairulnizam Tuan Kamauzaman. "Developing Key Performance Indicators for Emergency Department of Teaching Hospitals: A Mixed Fuzzy Delphi and Nominal Group Technique Approach." Malaysian Journal of Medical Sciences 29, no. 2 (2022): 114–25. http://dx.doi.org/10.21315/mjms2022.29.2.11.

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Background: This article demonstrates combination of the fuzzy Delphi method (FDM) and the nominal group technique (NGT) to consolidate consensus agreement within a panel of experts regarding key performance indicators (KPIs) development for emergency department (ED). Methods: Twenty-four participants for NGT and 10 experts for FDM were randomly chosen from the emergency medicine (EM) department staff list obtained from the human resource department of study centres. A set of item constructs related to KPIs was developed from the NGT session and used for the FDM session in the second phase of

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Bakır, Ali Alperen, Resul Atik, and Sezer Özerinç. "Mechanical properties of thermoplastic parts produced by fused deposition modeling:a review." Rapid Prototyping Journal 27, no. 3 (2021): 537–61. http://dx.doi.org/10.1108/rpj-03-2020-0061.

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Purpose This paper aims to provide an overview of the recent findings of the mechanical properties of parts manufactured by fused deposition modeling (FDM). FDM has become a widely used technique for the manufacturing of thermoplastic parts. The mechanical performance of these parts under service conditions is difficult to predict due to the large number of process parameters involved. The review summarizes the current knowledge about the process-property relationships for FDM-based three-dimensional printing. Design/methodology/approach The review first discusses the effect of material select

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Gordelier, Tessa Jane, Philipp Rudolf Thies, Louis Turner, and Lars Johanning. "Optimising the FDM additive manufacturing process to achieve maximum tensile strength: a state-of-the-art review." Rapid Prototyping Journal 25, no. 6 (2019): 953–71. http://dx.doi.org/10.1108/rpj-07-2018-0183.

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Purpose Additive manufacturing or “3D printing” is a rapidly expanding sector and is moving from a prototyping service to a manufacturing service in its own right. With a significant increase in sales, fused deposition modelling (FDM) printers are now the most prevalent 3D printer on the market. The increase in commercial manufacturing necessitates an improved understanding of how to optimise the FDM printing process for various product mechanical properties. This paper aims to identify optimum print parameters for the FDM process to achieve maximum tensile strength through a review of recent

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Keleş, Özgür, Eric H. Anderson, and Jimmy Huynh. "Mechanical reliability of short carbon fiber reinforced ABS produced via vibration assisted fused deposition modeling." Rapid Prototyping Journal 24, no. 9 (2018): 1572–78. http://dx.doi.org/10.1108/rpj-12-2017-0247.

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Purpose Mechanical reliability (variations in mechanical properties) of fused deposition modeled (FDMed) short-fiber-reinforced composites are unknown, which limits wider and safer use of these composites. Accordingly, this paper aims to investigate the mechanical reliability of FDMed model material short-carbon-fiber-reinforced acrylonitrile butadiene styrene (SCFR-ABS). A new vibration-assisted FDM (VA-FDM) process was used to reduce porosity. Design/methodology/approach Tensile tests were performed on FDMed SCFR-ABS produced with and without vibrations. Weibull analysis was performed to qua

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Deng, Xianzheng, Xin Bian, and Mingqi Li. "Enhanced LDM for Next-Generation Digital Broadcasting Transmission." Sensors 21, no. 5 (2021): 1716. http://dx.doi.org/10.3390/s21051716.

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In the traditional layered division multiplexing (LDM) system, by simply adjusting the injection level, the reception performance of the core layer (CL) mobile services will be decreased significantly, resulting in the deterioration of system coverage performance. Thus, it is necessary to improve the performance of the enhanced layer (EL) service reception without affecting the reception threshold of CL service. To achieve this, in this paper, an enhanced LDM (En-LDM) scheme that supports multi-service transmission is proposed for the next-generation broadcasting network. In this scheme, at th

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Singh, Sunpreet, and Rupinder Singh. "Mechanical characterization and comparison of additive manufactured ABS, Polyflex™ and ABS/Polyflex™ blended functional prototypes." Rapid Prototyping Journal 26, no. 2 (2020): 225–37. http://dx.doi.org/10.1108/rpj-11-2017-0234.

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Purpose Additive manufacturing (AM) is one of the latest and most advanced technologies that are continuously expanding into various field applications. Undoubtedly, fused deposition modeling (FDM) is one of the oldest and extensively used AM technologies not only because of the advantage of low cost, comparatively moderate production speed and negligible wastage but also due to acceptance of a wide range of thermoplastics, reinforced and blended feedstock for making the end product suitable for service. The purpose of this work to perform mechanical characterization of standard samples printe

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Augsten, Marie Theres, Patryk Fischer, Janna Kienbaum, Anna Lehmann, Sven Paßmann, and Simon Schmiederer. "Forschungsdatenmanagement im Verbund weiterentwickeln – ein Einblick in das Projekt FDNext." Bibliotheksdienst 56, no. 9 (2022): 520–37. http://dx.doi.org/10.1515/bd-2022-0083.

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Zusammenfassung Im DFG-Forschungsprojekt FDNext arbeiten sechs Universitäten aus Berlin und Brandenburg zusammen, um im Verbund ein nachhaltiges institutionelles Forschungsdatenmanagement mit der Entwicklung verschiedener Tools für Fachbereiche, Rechtsberatung, Policies und Service Management auszubauen. In der dreijährigen Förderphase werden Werkzeuge und Konzepte für Fachbereiche, Rechtsberatung, Policies und Service-Management im engen Austausch mit Projektpartner*innen aus Fakultäten, Fachbereichen und der Forschung erarbeitet, (weiter-)entwickelt und abschließend mit Akteur*innen der bund

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Martins, Rui F., Ricardo Branco, Filippo Berto, Nuno Soares, and Sebastião Bandeira. "Structural Integrity of Polymeric Components Produced by Additive Manufacturing (AM)—Polymer Applications." Polymers 13, no. 24 (2021): 4420. http://dx.doi.org/10.3390/polym13244420.

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In the work presented herein, the structural integrity of polymeric functional components made of Nylon-645 and Polylactic acid (PLA) produced by additive manufacturing (Fused Deposition Modelling, FDM) is studied. The PLA component under study was selected from the production line of a brewing company, and it was redesigned and analyzed using the Finite Element Method, 3D printed, and installed under real service. The results obtained indicated that, even though the durability of the 3D printed part was lower than the original, savings of about EUR 7000 a year could be achieved for the compon

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Bermudo Gamboa, Carolina, Sergio Martín-Béjar, Francisco Javier Trujillo Vilches, Manuel Herrera Fernández, and Lorenzo Sevilla Hurtado. "Fatigue Behavior Analysis in Reinforced PLA Parts Manufactured by FDM." Key Engineering Materials 956 (September 29, 2023): 91–98. http://dx.doi.org/10.4028/p-ocvw8o.

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Fused Material Deposition Modelling (FDM) is one of the most extensive 3D printing processes. However, its integration and application to structural parts remain limited to some extent, due to the polymeric materials that can be processed, generally PLA and ABS. FDM printing involves a large number of manufacturing parameters, which can also influence the mechanical properties of the final part. Although the static mechanical properties of FDM components are well documented, the dynamic mechanical properties are not yet fully analyzed. Similarly, in the field of composite materials, reinforced

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Durgun, Ismail, and Rukiye Ertan. "Experimental investigation of FDM process for improvement of mechanical properties and production cost." Rapid Prototyping Journal 20, no. 3 (2014): 228–35. http://dx.doi.org/10.1108/rpj-10-2012-0091.

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Purpose – The mechanical properties and surface finish of functional parts are important consideration in rapid prototyping, and the selection of proper parameters is essential to improve manufacturing solutions. The purpose of this paper is to describe how parts manufactured by fused deposition modelling (FDM), with different part orientations and raster angles, were examined experimentally and evaluated to achieve the desired properties of the parts while shortening the manufacturing times due to maintenance costs. Design/methodology/approach – For this purpose, five different raster angles

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Finali, Asmar, and Muhammad Abdul Wahid. "Pelatihan 3D Print FDM Untuk Teaching Factory Di SMK Dian Kirana Sragen." Jurnal Pengabdian kepada Masyarakat UBJ 8, no. 1 (2025): 13–22. https://doi.org/10.31599/2sxtj039.

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FDM (Fused Deposition Modeling) 3D Printer tool training to support Teaching Factory (TEFA) in SMK aims to improve technical skills and students' readiness to face the challenges of industry 4.0. 3D printing technology has become an important innovation in the manufacturing world, which allows the creation of three-dimensional objects quickly and precisely. Therefore, mastery of this technology is very important for SMK, especially those involved in the TEFA program. This community service activity was carried out to provide practical training to teachers on how to operate an FDM 3D Printer, a

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Barile, Claudia, Caterina Casavola, and Alberto Cazzato. "Acoustic Emissions in 3D Printed Parts under Mode I Delamination Test." Materials 11, no. 9 (2018): 1760. http://dx.doi.org/10.3390/ma11091760.

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This paper applies an innovative approach based on the acoustic emission technique to monitor the delamination process of 3D parts. Fused deposition modelling (FDM) is currently one of the most widespread techniques for additive manufacturing of a solid object from a computer model. Fundamentally, this process is based on a layer-by-layer deposition of a fused filament. The FDM technique has evolved to the point where it can now be proposed, not only as a prototyping technique, but also as one applicable to direct manufacturing. Nonetheless, a deeper comprehension of mechanical behavior and it

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CHEN, Chien-Jung, Yi-Kai JUAN, and Yin-Hao HSU. "DEVELOPING A SYSTEMATIC APPROACH TO EVALUATE AND PREDICT BUILDING SERVICE LIFE." Journal of Civil Engineering and Management 23, no. 7 (2017): 890–901. http://dx.doi.org/10.3846/13923730.2017.1341956.

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Analyzing the reasonable service life of buildings is a critical step to evaluate the decision for building utilization, reuse, or disposal. If buildings manifest service value, sustainable refurbishment and reuse methods can be employed to extend their service life. Previous studies on building service life largely focused on physical obsolescence. Few studies have analyzed other aspects. The objective of the present study was to propose a systematic approach to evaluate and predict the reasonable service life of buildings. First, the Fuzzy-Delphi Method (FDM) and analytical hierarchy process

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Wang, Jian Mei, Qing Xue Huang, Jian Feng Kang, and Yang Fan. "Research on Energy Equation of Lubrication Model on Large-Scale Journal Bearing System." Advanced Materials Research 145 (October 2010): 139–44. http://dx.doi.org/10.4028/www.scientific.net/amr.145.139.

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To prolong the service life of large-scale journal bearings, the major factors that have influences on bearing performances should be taken into account. By consideration of the variations of viscosity and density with pressure and temperature, a more thorough thermo-hydrodynamic lubrication model was established. With designation of variables with nondimensional parameters, a series of equations were nondimensionied, and the corresponding energy equations at different oil-film layers and boundaries were obtained respectively according to proper difference formats, and then solved by the integ

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DOROKHOV, ALEKSEI S., and ALEKSEI S. SVIRIDOV. "APPLICATION OF ADDITIVE TECHNOLOGIES IN THE TECHNICAL SERVICE OF GARDEN EQUIPMENT." AGRICULTURAL ENGINEERING, no. 6 (2020): 39–44. http://dx.doi.org/10.26897/2687-1149-2020-6-39-44.

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The paper considers the analysis of the market for garden equipment. The authors consider some information on garden equipment failures, using an example of Husqvarna trimmers. They also assess a possibility of using additive technologies to manufacture sliding bearings for mechanical drives of garden equipment. For testing the physical and mechanical properties, a batch of samples was prepared by means of 3D printing using FDM (FFF) technology. According to the ASTM D638-14 standard, samples were prepared on a PICASO 3D Desingner X Pro 3D printer. Samples were made of ABS-plastic and PA12 wit

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Che Jamaludin, Farrah Ilyani, Muhammad Ridhuan Tony Lim Abdullah, Mohd Nuri Al-Amin Endut, Mohd Ikhwan Izzat Zulkefli, and Syaaibah Zulkipli. "Development of impact assessment instruments for renewable energy investments in Orang Asli communities." Journal of Nusantara Studies (JONUS) 10, no. 1 (2025): 443–65. https://doi.org/10.24200/jonus.vol10iss1pp443-465.

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Background and Purpose: The transition to renewable energy is crucial for sustainability, but its impact on marginalized communities, such as the Orang Asli in Malaysia, is insufficiently explored. This study aims to develop culturally sensitive impact assessment tools to evaluate renewable energy projects' effects on the Orang Asli. The purpose is to create a comprehensive framework that ensures these projects are socially, economically, and environmentally inclusive. Methodology: This study used the Fuzzy Delphi Method (FDM) and Analytic Hierarchy Process (AHP) to identify and prioritize key

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Tunalioglu, Mert Safak, and Bekir Volkan Agca. "Wear and Service Life of 3-D Printed Polymeric Gears." Polymers 14, no. 10 (2022): 2064. http://dx.doi.org/10.3390/polym14102064.

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Plastic gears are mostly used in the textile, food, and automotive industries due to their silent operation, corrosion resistance, and light and cheap advantages. Plastic gears are generally manufactured by injection molding or hobbing methods. The excess costs of the molds used to produce parts in injection molding and the problems of wastes that occur during production in hobbing lead companies to additive manufacturing, which is an alternative application. In the additive manufacturing method, the desired amount of product is produced without the problem of waste. In this study, the wear re

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Chen, Wen-Kuo, Venkateswarlu Nalluri, Man-Li Lin, and Ching-Torng Lin. "Identifying Decisive Socio-Political Sustainability Barriers in the Supply Chain of Banking Sector in India: Causality Analysis Using ISM and MICMAC." Mathematics 9, no. 3 (2021): 240. http://dx.doi.org/10.3390/math9030240.

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The banking sector often plays a crucial role in the improvement of infrastructure and economy of any country. In many emerging economies, it is apparent that a wide variety of social and political issues are related to the associated supply chain sustainability of financial service firms. Although such sustainability and its implementation issues have largely been addressed in existing research literature and in practice for many years, the attention towards socio-political sustainability aspects has been quite limited. Thus, this study attempted to explore the determinants for improving soci

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Ahmad, Mohamed Tarmizi, Michael Lam, A. S. Mohd Harithuddin, Amzari Zhahir, and Omar Kassim Ariff. "Flight Data Monitoring/Tracker System for Search and Rescue Mission." Applied Mechanics and Materials 629 (October 2014): 350–54. http://dx.doi.org/10.4028/www.scientific.net/amm.629.350.

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<p>Traditionally, Kalman Filter is used for the purpose of mixing several input signals and extracting a more reliable output, which greatly benefits aircraft navigation. This paper considers a fusion of four sensor systems: Global Positioning System (GPS), accelerometer, gyroscope and magnetometer. The resultant device, known as Starfish Main Tracking Unit (MTU), is a Flight Data Monitoring (FDM) / Tracking System equipment that uses General Packet Radio Service (GPRS) / Iridium / ICS (Internet Communications Services), which provides low cost telemetry as well as multiple solutions for

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Pervaiz, Salman, Taimur Ali Qureshi, Ghanim Kashwani, and Sathish Kannan. "3D Printing of Fiber-Reinforced Plastic Composites Using Fused Deposition Modeling: A Status Review." Materials 14, no. 16 (2021): 4520. http://dx.doi.org/10.3390/ma14164520.

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Composite materials are a combination of two or more types of materials used to enhance the mechanical and structural properties of engineering products. When fibers are mixed in the polymeric matrix, the composite material is known as fiber-reinforced polymer (FRP). FRP materials are widely used in structural applications related to defense, automotive, aerospace, and sports-based industries. These materials are used in producing lightweight components with high tensile strength and rigidity. The fiber component in fiber-reinforced polymers provides the desired strength-to-weight ratio; howev

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Zhang, Jun, Zude Zhou, Fan Zhang, Yuegang Tan, Yiwen Tu, and Baojun Yang. "Performance of 3D-Printed Continuous-Carbon-Fiber-Reinforced Plastics with Pressure." Materials 13, no. 2 (2020): 471. http://dx.doi.org/10.3390/ma13020471.

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Fused Deposition Modeling (FDM) has been investigated as a low-cost manufacturing method for fiber-reinforced composites. The traditional and mature technology for manufacturing continuous-carbon-fiber-reinforced plastics is Automated Fiber Placement (AFP), which uses a consolidation roller and an autoclave process to improve the quality of parts. Compared to AFP, FDM is simple in design and operation but lacks the ability to pressurize and heat the model. In this work, a novel method for printing continuous carbon-fiber-reinforced plastics with a pressure roller was investigated. First, the p

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Karupaiah, Vigneshwaran, Venkateshwaran Narayanan, Rajini Nagarajan, et al. "Performance evaluation of 3D-printed ABS and carbon fiber-reinforced ABS polymeric spur gears." BioResources 19, no. 2 (2024): 2796–810. http://dx.doi.org/10.15376/biores.19.2.2796-2810.

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Acrylonitrile butadiene styrene (ABS) polymer and carbon fiber reinforced acrylonitrile butadiene styrene (CF/ABS) spur gears were 3D-printed using fusion deposition modeling (FDM) with different fillet radii of 0.25, 0.50, and 0.75 mm. The performance of the fabricated gears was studied with the effect of fillet radius on varying load and speed conditions. The thermal properties of the gears were also investigated. The results indicated that 3D-printed CF/ABS spur gear exhibited better performance than the pure ABS. The 3D-printed CF/ABS gear with fillet radius of 0.25 mm recorded the highest

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Màrius, Caus, and Isabel Pérez-Neira Ana. "FBMC-based Random Access Signal Design and Detection for LEO Base Stations." IEEE Trans. Wireless Commun. 22, no. 3 (2023): 1. https://doi.org/10.1109/TWC.2022.3209898.

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The integration of non-terrestrial networks into the 5G ecosystem is mainly driven by the possibility of provisioning service in remote areas. In this context, the advent of flying base stations at the low Earth orbit (LEO) will enable anywhere and anytime connectivity. To materialize this vision, it is of utmost importance to improve radio protocols with the aim of allowing direct satellite access. Bearing this aspect in mind, we present a new random access signal, which is based on the filter bank multicarrier (FBMC) waveform, and a computationally efficient detection scheme. The proposed so

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Liu, Yuhao, Jiayuan Han, Peng Yan, Biyao Li, Maolin Yang, and Pingyu Jiang. "A Novel Kind of Knowledge Graph Construction Method for Intelligent Machine as a Service Modeling." Machines 12, no. 10 (2024): 723. http://dx.doi.org/10.3390/machines12100723.

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With the development of Intelligent Machine as a Service (IMaaS), devices increasingly require personalization, intelligence, and service orientation, making resource modeling a key challenge. Knowledge graph (KG) technology, known for unifying heterogeneous data, has become an essential tool for modeling and analyzing manufacturing resources. On this basis, this study proposes a novel resource KG construction method for IMaaS. First, an E-R diagram is used to divide the constant and variable entities and set the constant attributes and the constant relationships. Then, the triplets are named,

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Nsengimana, Joseph, Jacobus Van der Walt, Eujin Pei, and Maruf Miah. "Effect of post-processing on the dimensional accuracy of small plastic additive manufactured parts." Rapid Prototyping Journal 25, no. 1 (2019): 1–12. http://dx.doi.org/10.1108/rpj-09-2016-0153.

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Purpose This paper aims to investigate the effect of post-processing techniques on dimensional accuracy of laser sintering (LS) of Nylon and Alumide® and fused deposition modelling (FDM) of acrylonitrile butadiene styrene (ABS) materials. Design/methodology/approach Additive manufacturing (AM) of test pieces using LS of Nylon and Alumide® powders, as well as the FDM of ABS materials, were first conducted. Next, post-processing of the test pieces involved tumbling, shot peening, hand finishing, spray painting, CNC machining and chemical treatment. Touch probe scanning of the test pieces was und

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Cao, Yan, Liang Huang, Yu Bai, and Qingming Fan. "FDM Rapid Prototyping Technology of Complex-Shaped Mould Based on Big Data Management of Cloud Manufacturing." Complexity 2018 (November 1, 2018): 1–14. http://dx.doi.org/10.1155/2018/9432897.

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In order to solve the problem of high cost and long cycle in the process of traditional subtractive material manufacturing of a complex-shaped mould, the technology of FDM rapid prototyping is used in combination with the global service idea of cloud manufacturing, where the information of various kinds of heterogeneous-forming process data produced in the process of FDM rapid prototyping is analysed. Meanwhile, the transfer and transformation relation of each forming process data information in the rapid manufacturing process with the digital model as the core is clarified, so that the FDM ra

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Naiju, C. D., K. Annamalai, Ramaraj Goutham, and S. Karthik. "Reliability of Fused Deposition Modelling (FDM) Components on Fatigue Cycles to Failure Using Weibull Analysis." Applied Mechanics and Materials 232 (November 2012): 895–98. http://dx.doi.org/10.4028/www.scientific.net/amm.232.895.

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Application of fused deposition modelling components are gaining popularity in functional application. In order to use these components directly for functional application, reliability in service has to be acheived. A Reliability analysis was caried out on components manufactured by fused deposition modelling. A standard test specimen as per ASTM was prepared and tested for fatigue cycles to failure. Bending stress was calculated prior to the fatigue testing by varying the slice thickness. Fatigue test was carried out with differnt loading condition. Fatigue test results were subjected to weib

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Ahn, S. H., S. McMains, C. H. Séquin, and P. K. Wright. "Mechanical implementation services for rapid prototyping." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 216, no. 8 (2002): 1193–99. http://dx.doi.org/10.1243/095440502760272467.

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Inspired by the metal oxide system implementation service (MOSIS) project, CyberCut is an experimental fabrication testbed for an Internet-accessible, computerized prototyping and machining service. Client-designers can create mechanical components, generally using our web-based computer aided design (CAD) system (available at http://cad.berkeley.edu ), and submit appropriate files to the server at Berkeley for process planning. CyberCut then utilizes an open-architecture, computer numerical control (CNC) machine tool for fabrication. Rapid tool path planning, novel fixturing techniques and se

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Wang, Jian Mei, Qing Xue Huang, Zheng Yi Jiang, and Kiet Tieu. "The Effects of Shear Stress on the Lubrication Performances of Oil Film of Large-Scale Mill Bearing." Advanced Materials Research 76-78 (June 2009): 713–18. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.713.

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A new coupling numerical algorithm has been developed to integrate Finite Difference Method (FDM) with Boundary Element Method (BEM) to analyze shear performance of oil film by iteratively solving a series of equations such as the film flow velocity and shear stress equations for contact bodies in bearing system. With consideration of the variations of viscosity and density with pressure and temperature, the effects of shear stress of oil film layers on lubrication performance of contact surfaces under different loadcases were discussed. Moreover, Germany-made Anton Paar MRD (Magnetic Rheologi

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Li, Wei, Yiyan Wu, Sébastien Laflèche, et al. "Coverage Study of ATSC 3.0 under Strong Co-Channel Interference Environments." IEEE Transactions on Broadcasting 65, no. 1 (2018): 73–82. https://doi.org/10.1109/TBC.2018.2832446.

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In addition to the traditional TDM/FDM, the advanced television systems committee (ATSC) 3.0 next generation digital TV standard has adopted state-of-the-art coding and modulation, as well as the new layered division multiplexing (LDM) technology. The ATSC 3.0 system is able to provide higher data throughput, more robust reception, better spectrum efficiency, and flexible service combinations in one RF channel with different robustness and reception conditions. Due to the adoption of a two-layer LDM, the coverage for ATSC 3.0 is very different from the legacy one-transmitter-one-coverage ATSC

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Kumar Rai, Ashish. "FDI in Service Sector - Policy for India?s Services Sector." International Journal of Scientific Engineering and Research 5, no. 8 (2017): 7–13. https://doi.org/10.70729/ijser171755.

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Peng, Lei-Yi, Jia Lu, Jian-Ji Luo, and Yu-Xuan Wang. "A Combination of FDM, DEMATEL, and DANP for Disclosing the Interrelationship of Influencing Factors in Rural Homestay Business: Empirical Evidence from China." Sustainability 14, no. 16 (2022): 10341. http://dx.doi.org/10.3390/su141610341.

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As a rural tourism product, homestays play an essential role in sustainability. The operation of homestay business is directly linked to the success or failure of community-based tourism development. By taking rural homestay business in Zhejiang as a research object, the paper aims to clarify the interrelationships among influencing factors in the operation of rural homestay business from a performance perspective. Based on multi-criteria decision making (MCDM) techniques, this paper not only constructed the evaluation system of homestay business in the Chinese context by the Fuzzy Delphi Meth

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Zhou, Xin Gang, and Hui Xia. "Influence of Geometry Parameters on Durability of Concrete Structures Exposed to Chloride Environment." Applied Mechanics and Materials 204-208 (October 2012): 3194–200. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3194.

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Finite difference method (FDM) is used to numerical stimulation analysis for chloride diffusion in concrete. By numerical computing, comparison of chloride content profile in different concrete members with different sectional shapes is made. Calculation and comparison show the chloride content prolife in rectangular and circular section has obvious difference. If the side length of rectangular section is equal to the diameter of circular section, as well as the material property and environment, the chloride content in rectangular section is higher than that in that in circular section. In th

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Jirků, Petr, Miroslav Muller, Rajesh Kumar Mishra, and Jaroslava Svobodová. "Effect of Recycling and UV Ageing on the Properties of PLA-Based Materials Used in Additive Manufacturing." Polymers 17, no. 13 (2025): 1862. https://doi.org/10.3390/polym17131862.

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This article focuses on the possibility of using biodegradable polymer-composite materials in additive manufacturing via fused deposition modelling (FDM) 3D printing. The main objective was to experimentally verify the technical feasibility of the repeated use of recycled PLA and PLA composites containing 10% natural coffee-ground (CG) filler in a print–degradation–recycling–print cycle. Special attention was paid to simulated ultraviolet radiation as a degradation factor affecting the materials’ mechanical properties. Pure PLA and PLA_CG were compared at four levels of degradation time and af

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Zhang, Jiansheng, Guiqian Xiao, Jie Peng, Yingyan Yu, and Jie Zhou. "Path Generation Strategy and Wire Arc Additive Manufacturing of Large Aviation Die with Complex Gradient Structure." Materials 15, no. 17 (2022): 6115. http://dx.doi.org/10.3390/ma15176115.

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To realize automatic wire arc additive manufacturing (WAAM) of a large aviation die with a complex gradient structure, a new contour-parallel path generation strategy was proposed and practically applied. First, the planar curve was defined as a vertical slice of a higher-dimensional surface and a partial differential equation describing boundary evolution was derived to calculate the surface. The improved Finite Element Method (FEM) and Finite Difference Method (FDM) were used to solve this partial differential equation. Second, a cross section of a large aviation die was used to test the pat

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Saeed, Khalid, Alistair Mcilhagger, Thomas Dooher, et al. "Lap Shear Strength and Fatigue Analysis of Continuous Carbon-Fibre-Reinforced 3D-Printed Thermoplastic Composites by Varying the Load and Fibre Content." Polymers 16, no. 5 (2024): 579. http://dx.doi.org/10.3390/polym16050579.

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This study focuses on evaluating the fatigue life performance of 3D-printed polymer composites produced through the fused deposition modelling (FDM) technique. Fatigue life assessment is essential in designing components for industries like aerospace, medical, and automotive, as it provides an estimate of the component’s safe service life during operation. While there is a lack of detailed research on the fatigue behaviour of 3D-printed polymer composites, this paper aims to fill that gap. Fatigue tests were conducted on the 3D-printed polymer composites under various loading conditions, and s

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Solanki, Kalpana. "An Exploratory Study: Evaluation of the Customer Happiness Based on the Administrative Services Provided by A Low-Cost Airline." Archives of Business Research 12, no. 3 (2024): 162–78. http://dx.doi.org/10.14738/abr.123.16675.

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The current research as presented in this report, was carried out on a selected organization, which is Fly Dubai Airlines, operating in the United Arab Emirates (UAE). The aim of the study was to analyse whether the company is offering high quality of administrative services, and how well the services are satisfying and making its customers happy. The study attempted to determine the effectiveness of the administrative services suggest improvement its services over time. A mixed methods research approach was considered for the study, based on which a combination of the qualitative and quantita

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Chen, Wen-Kuo, Venkateswarlu Nalluri, Suresh Ma, Mei-Min Lin, and Ching-Torng Lin. "An Exploration of the Critical Risk Factors in Sustainable Telecom Services: An Analysis of Indian Telecom Industries." Sustainability 13, no. 2 (2021): 445. http://dx.doi.org/10.3390/su13020445.

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Different sources of risk factors can occur in sustainable supply chain management due to its complex nature. The telecommunication service firm cannot implement multiple improvement practices altogether to overcome the risk factors with limited resources. The industries should evaluate the relationship between risk factors and explore the determinants of improvement measures. The purpose of the present study is to identify and analyze critical risk factors (CRFs) for enhancing sustainable supply chain management practices in the Indian telecommunication industry using interpretive structural

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Wu, Lee-Chun, Kuei-Lun Chang, Tung-Lin Chuang, You-Shyang Chen, and Jung-Fa Tsai. "Identification of Applicable YouTubers for Hotels: A Case Study of Integrated Hybrid MCDM Model." Sustainability 14, no. 18 (2022): 11494. http://dx.doi.org/10.3390/su141811494.

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The coronavirus disease 2019 (COVID-19) pandemic has caused a serious business recession in various walks of life, particularly in the full-service hotel industry. YouTube has one billion active users and is undoubtedly a social media platform that companies use to build relationships with customers and create value for brands. Marketers should be aware of YouTubers’ significant influence on complex decision-making processes. Given the above reasons, identifying a YouTuber attracts the concerns of various industries; thus, this important issue is focused on and offered the study’s rationality.

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Hetrick, Dakota R., Seyed Hamid Reza Sanei, Omar Ashour, and Charles E. Bakis. "Charpy impact energy absorption of 3D printed continuous Kevlar reinforced composites." Journal of Composite Materials 55, no. 12 (2021): 1705–13. http://dx.doi.org/10.1177/0021998320985596.

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Additive manufacturing (AM) has been used widely to produce three-dimensional (3D) parts from computer-aided design (CAD) software. Traditional Fused Deposition Modeling (FDM) 3D printed polymer parts lack the necessary strength to be used for functional parts in service. The potential of printing continuous fiber reinforced composites has resulted in parts with better mechanical properties and enhanced performance. Very few studies have investigated the impact energy absorption of continuous fiber reinforced 3 D printed composites. The purpose of this work is to investigate the effect of diff

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Velázquez, Jose S., Francisco Cavas, José M. Bolarín, and Jorge L. Alió. "3D Printed Personalized Corneal Models as a Tool for Improving Patient’s Knowledge of an Asymmetric Disease." Symmetry 12, no. 1 (2020): 151. http://dx.doi.org/10.3390/sym12010151.

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Additive manufacturing is a vanguard technology that is currently being used in several fields in medicine. This study aims to evaluate the viability in clinical practice of a patient-specific 3D model that helps to improve the strategies of the doctor-patient assistance. Data obtained from a corneal topographer were used to make a virtual 3D model by using CAD software, to later print this model by FDM and get an exact replica of each patient’s cornea in consultation. Used CAD and printing software were open-source, and the printing material was biodegradable and its cost was low. Clinic user

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Rehman, Rizwan Ur, Uzair Khaleeq uz Zaman, Shahid Aziz, et al. "Process Parameter Optimization of Additively Manufactured Parts Using Intelligent Manufacturing." Sustainability 14, no. 22 (2022): 15475. http://dx.doi.org/10.3390/su142215475.

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Additive manufacturing is the technique of combining materials layer by layer and process parameter optimization is a method used popularly for achieving the desired quality of a part. In this paper, four input parameters (layer height, infill density, infill pattern, and number of perimeter walls) along with their settings were chosen to maximize the tensile strength for a given part. Taguchi DOE was used to generate an L27 orthogonal array which helped to fabricate 27 parts on the Ender 3 V2 fused deposition modeling (FDM) printer. The ultimate testing machine was used to test all 27 samples

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Cong, Yu, Zhulan Liu, Xiaoshan Wang, et al. "Critical Instability Criterion of Large-Diameter Shafts in Deep Topsoil Based on Ultimate Strain Analysis." Sustainability 14, no. 21 (2022): 14552. http://dx.doi.org/10.3390/su142114552.

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Shaft stability plays an important role in mine safety. Most of the previous studies focused on the stress analysis of shafts using monitoring data. Since the shaft wall state in the deep topsoil stratum is still not clear, the ultimate analysis method is adopted to study the bearing capacity and the strain of a large-diameter shaft wall in Yanzhou coal mine. First, the bearing capacity of the shaft wall is discovered. The value of the auxiliary shaft, main shaft and ventilating shaft is 22.22 MPa, 22.07 MPa and 21.73 MPa, respectively. Then, the ultimate strain of the shaft wall is obtained;

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Shalenko, Vadym, Boris Korniychuk, and Andriі Masluyk. "Z-axis limit switch 3D printer." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 96 (December 31, 2020): 22–27. http://dx.doi.org/10.32347/gbdmm2020.96.0301.

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Not much time has passed since the appearance of the first 3D printer. Today there are many different printers. They differ in various 3D printing technologies, namely: Stereolithography – SL, Selective Laser Sintering, Fused Deposition Modeling – FDM, Laminated Object Manufacturing – LOM, Polyjet and Ployjet Matrix. In recent years, the spread of 3D printing technology has become and continues to be used more and more today. Of course, in the future we will see a large-scale spread of additive methods, but the practical application of 3D printing today is available to everyone. Melting

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Rondeau, Claude, and Gilles Guérin. "Sélection des méthodes de cueillette de l’information dans la recherche d’emploi : une analyse empirique." Articles 52, no. 2 (2009): 185–205. http://dx.doi.org/10.7202/800670ar.

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Abstract Assuming that differences in the cost of using various job search methods are negligible, the authors suggest that the job searcher makes use of specific combinations of complementary methods, and that the composition of these combinations reflects relevant personal characteristics of the job searcher (the structure of labour supply) and the searcher's perception of the characteristics of vacancies (the structure of labor demand). This hypothesis is analysed with the help of data collected by a questionnaire mailed to 1100 blue- and white-collar workers laid off from a Montreal aerona

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Muhammad, Sabir Ramadhan, Jalinus Nizwardi, Refdinal, et al. "Analysis of FAM in satisfaction of inpatient services." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 19, no. 5 (2021): 1529–34. https://doi.org/10.12928/telkomnika.v19i5.20295.

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Patients are the main object who must get the best service at a hospital, because the quality of hospital services determines the recovery of a patient and the quality of the hospital. The quality of hospital services has two components, namely the fulfillment of predetermined quality standards and the fulfillment of patient satisfaction. Hospitals must provide services that focus on patient satisfaction. Improving the quality of health services can be started by evaluating each element that plays a role in shaping patient satisfaction. The application of evaluation measures to patient care in

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Palka, Dorota. "Use of Reverse Engineering and Additive Printing in the Reconstruction of Gears." Multidisciplinary Aspects of Production Engineering 3, no. 1 (2020): 274–84. http://dx.doi.org/10.2478/mape-2020-0024.

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AbstractDespite the very rapid technological development, the general concept of mechanical devices has not changed. Still, the most common element of these devices are gears, whose range of use is very wide. There are both technological and historical considerations for the reconstruction of gears and other elements. In particular, this applies to spare parts for technical facilities that are not available on the market or service costs are too high. Contemporary reconstruction is called Reverse Engineering, which offers tools that allow transformation of an existing object through a virtual

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