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Journal articles on the topic 'Hand printer'

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1

Lee, Keun Ho, Sung Jae Kim, Yong Ho Cha, Jae Lim Kim, Dong Kyu Kim, and Sang Jun Kim. "Three-dimensional printed prosthesis demonstrates functional improvement in a patient with an amputated thumb: A technical note." Prosthetics and Orthotics International 42, no. 1 (2016): 107–11. http://dx.doi.org/10.1177/0309364616679315.

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Background and Aim: Three-dimensional printer is widely used in industry, biology, and medical fields. We report a finger prosthesis produced by a three-dimensional scanner and printer for a 67-year-old man with a right thumb amputation above the metacarpophalangeal joint. Technique: His right amputated and left intact hands were scanned with a three-dimensional scanner, and the left-hand image was rotated to the right side to design the right thumb prosthesis. The designed prosthesis was printed with a three-dimensional printer using the fused filament fabrication output system. Discussion: T
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Wendo, Kevin, Catherine Behets, Olivier Barbier, et al. "Dimensional Accuracy Assessment of Medical Anatomical Models Produced by Hospital-Based Fused Deposition Modeling 3D Printer." Journal of Imaging 11, no. 2 (2025): 39. https://doi.org/10.3390/jimaging11020039.

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As 3D printing technology expands rapidly in medical disciplines, the accuracy evaluation of 3D-printed medical models is required. However, no established guidelines to assess the dimensional error of anatomical models exist. This study aims to evaluate the dimensional accuracy of medical models 3D-printed using a hospital-based Fused Deposition Modeling (FDM) 3D printer. Two dissected cadaveric right hands were marked with Titanium Kirshner wires to identify landmarks on the heads and bases of all metacarpals and proximal and middle phalanges. Both hands were scanned using a Cone Beam Comput
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Maryam, Hanan Yahya, Hamzah Norhazimi, Othman Azizul, Diyana Rosli Anis, Baharudin Rohaiza, and Izhar Che Ani Adi. "Design and Development ofa Mirror Effect Control Prosthetic Hand with Force Sensing." TELKOMNIKA Telecommunication, Computing, Electronics and Control 15, no. 2 (2017): 949–56. https://doi.org/10.12928/TELKOMNIKA.v15i2.6150.

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Some of the already available prosthetic hands in the market are operated in open loop, without any feedback and expensive. This system counters those by having the prosthetic hand printed using 3D printer and consist of a feedback sensor to make it a closed loop system. The system generally consists of two sections, mainly Finger Input and Prosthetic Output. The two sections communicate wirelessly for data transferring. The main purpose of the system is to control the prosthetic hand wirelessly using the Mirror Glove by performing a mirror effect that will translate movement from the glove on
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Racz, Laszlo, and Mircea Cristian Dudescu. "Numerical Investigation of the Infill Rate upon Mechanical Proprieties of 3D-Printed Materials." Polymers 14, no. 10 (2022): 2022. http://dx.doi.org/10.3390/polym14102022.

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The paper proposes a novel method of numerical simulation of the fused deposition molding 3Dprinted parts. The single filaments are modeled by a script using the G-code of the 3D printer. Based on experimental evaluation of the cross-sectional geometry of a printed tensile specimen, the connection between the filaments is determined and the flattening effect of the filaments can be counted. Finite element (FE) simulations considering different element lengths were validated by experimental tests. The methodology allows, on one hand, numerical estimation of the true cross-sectional area of a sp
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Baronio, Gabriele, Sami Harran, and Alberto Signoroni. "A Critical Analysis of a Hand Orthosis Reverse Engineering and 3D Printing Process." Applied Bionics and Biomechanics 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8347478.

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The possibility to realize highly customized orthoses is receiving boost thanks to the widespread diffusion of low-cost 3D printing technologies. However, rapid prototyping (RP) with 3D printers is only the final stage of patient personalized orthotics processes. A reverse engineering (RE) process is in fact essential before RP, to digitize the 3D anatomy of interest and to process the obtained surface with suitable modeling software, in order to produce the virtual solid model of the orthosis to be printed. In this paper, we focus on the specific and demanding case of the customized productio
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Yurii, Vizir, Chala Olena, Maksymova Svitlana, and Alkhalaileh Ahmad. "Lighting Control Module Development." JOURNAL OF UNIVERSAL SCIENCE RESEARCH 1, no. 12 (2023): 645–57. https://doi.org/10.5281/zenodo.10437563.

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Lighting control is an extremely pressing task in the modern world. On the one hand, poor lighting leads to reduced safety, including injuries and deaths. On the other hand, excessive lighting leads to excess energy waste, which should be avoided. This article describes the development of a lighting control module based on Arduino Mega. The article provides a selection of the necessary equipment, and a block diagram of the proposed device is also created. A 3D model of the device case was developed, and the case was also printed on a 3D printer. The assembly of the developed lighting control m
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Takeda, Kohei, Shunichi Hayashi, and Kazunori Ueki. "Deformation Properties of 3D Printed Shape Memory Polymer." Key Engineering Materials 725 (December 2016): 378–82. http://dx.doi.org/10.4028/www.scientific.net/kem.725.378.

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Recently, the 3D printer which can make products in a short time without cutting or casting has been attracted worldwide attention. If we use the 3D printer, it is possible that a customized product which is well suited to the individual is fabricated with low cost and in a short time. On the other hand, in the intelligent materials, shape memory polymer (SMP) has been practically used. In SMP, shape fixity and shape recovery appear based on the difference of properties of molecular motion between above and below the glass transition temperature in temperature variation. The thermomechanical p
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8

Ishikawa, Ren, and Kazuaki Hirana. "Development of Five-finger Robot Hand by Using 3D Printer." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2018 (2018): 2P2—D13. http://dx.doi.org/10.1299/jsmermd.2018.2p2-d13.

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9

Jassim, Mohamed S., and Hussain Kareem Khaleaf. "Design of 3D printer prosthetic hand with gear mechanism finger." IET Conference Proceedings 2024, no. 34 (2025): 200–205. https://doi.org/10.1049/icp.2025.0083.

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10

Kalas, David, Silvan Pretl, Jan Reboun, Radek Soukup, and Ales Hamacek. "Towards Hand Model with Integrated Multichannel Sensor System for Thermal Testing of Protective Gloves." Periodica Polytechnica Electrical Engineering and Computer Science 62, no. 4 (2018): 165–71. http://dx.doi.org/10.3311/ppee.13264.

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This paper deals with the development of a temperature sensor system consisting of multiple temperature sensors integrated into a model of a human hand and a system for data collection, processing and 3D visualization. The measuring part of the system uses temperature sensors TMP05, which enable daisy chain serial connection. The individual chains are then connected to the microprocessor. The microprocessor controls the temperature measurement and sends data to the computer, where data is processed, evaluated and visualized. The temperature sensors are mounted on flexible printed circuit board
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Bhagwat, Prasad, Prashant Raut, Shubham Darade, Soham Gangurde, and Neha R. Hiray. "Hand Gesture Enabled Operation for Computer Using Deep Learning." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 11 (2024): 1–7. http://dx.doi.org/10.55041/ijsrem38487.

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This project aims to develop a system that detects hand gestures and prints corresponding instructions for computer operators. The system utilizes Deep learning algorithms CNN and mediapipe to recognize hand gestures, and then prints instructions for the operator to perform specific computer operations.Operations like Notepad Open,Shutdown,Volume Up,Volume Down etc.The system will consist of a webcam, a Deep learning model, and a printer. The webcam will capture images of hand gestures, which will be processed using the Deep learning model to identify the specific gesture. The system will then
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Narlıoğlu, Nasir, Tufan Salan, and Mehmet Hakkı Alma. "Properties of 3D-printed wood sawdust-reinforced PLA composites." BioResources 16, no. 3 (2021): 5467–80. http://dx.doi.org/10.15376/biores.16.3.5467-5480.

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Thermal, morphological, and mechanical properties of three-dimensional (3D) printed polylactic acid (PLA) composites reinforced with different amounts of waste pine sawdust were investigated. To determine the mechanical properties of the obtained filaments, test samples were produced using a 3D printer according to the mechanical test standards. The filaments that were produced from blends that contained the wood sawdust at the highest level (20%) could be printed via a 3D printer without any problems. According to the results obtained from the mechanical tests, a decrease in the tensile stren
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Kuramochi, Takaho, Masaru Kawakami, Ajit Khosla, et al. "(Digital Presentation) Developing Meat Alternatives with Screw-Based 3D Food Printing." ECS Meeting Abstracts MA2022-01, no. 57 (2022): 2371. http://dx.doi.org/10.1149/ma2022-01572371mtgabs.

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Food 3D printers are next generation devices that can fabricate food products with complex internal structures and external shapes, and are expected to be used as devices for producing food products with shapes and textures that meet people's preferences, but also provide requirement of seven essential factors for a balanced diet: carbs, protein, fat, fiber, vitamins, minerals, and water [1, 2]. The food 3D printer can handle two types of food at the same time, and since it can form food in two colors, it can make food that cannot be made with a syringe nozzle. On the other hand, there are con
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DOWNTON, A. C., R. W. S. TREGIDGO, and E. KABIR. "RECOGNITION AND VERIFICATION OF HARDWRITTEN AND HAND-PRINTER BRITISH POSTAL ADDRESSES." International Journal of Pattern Recognition and Artificial Intelligence 05, no. 01n02 (1991): 265–91. http://dx.doi.org/10.1142/s0218001491000168.

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An algorithmic architecture for a high-performance optical character recognition (OCR) system for hand-printed and handwritten addresses is proposed. The architecture integrates syntactic and contextual post-processing with character recognition to optimise postcode recognition performance, and verifies the postcode against simple features extracted from the remainder of the address to ensure a low error rate. An enhanced version of the characteristic loci character recognition algorithm was chosen for the system to make it tolerant of variations in writing style. Feature selection for the cla
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15

Selleslach, Kristof. "A Reliability Check of Privilege Summaries Printed by Balthasar Moretus I (1610-1641)." Early Modern Low Countries 8, no. 2 (2024): 206–28. https://doi.org/10.51750/emlc20858.

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Publishers rarely provided the full text of a privilege in their books, instead offering only a summary, often in the language of the publication. Previous research has proved in one instance that the Antwerp printer Balthasar Moretus I (1574-1641) printed a summary which reflected his own desires rather than the terms of the privilege itself: he extended its territorial scope from the Duchy of Brabant to the entire Habsburg Netherlands, and he even cited his mother as a grantee. This incident raises the question how reliable the summaries of printer’s privileges were. For publishers in
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16

Kim, Sang Jun, Sung Jae Kim, Yong Ho Cha, Keun Ho Lee, and Jeong-Yi Kwon. "Effect of personalized wrist orthosis for wrist pain with three-dimensional scanning and printing technique: A preliminary, randomized, controlled, open-label study." Prosthetics and Orthotics International 42, no. 6 (2018): 636–43. http://dx.doi.org/10.1177/0309364618785725.

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Background: Three-dimensional printer technology can produce the personalized orthosis in various forms. Objective: To develop a personalized wrist orthosis using a three-dimensional scanner and three-dimensional printer for patients with wrist pain. Study design: A preliminary, prospective, randomized, open-label study. Methods: A total of 22 patients with wrist pain were randomly assigned to the control and experimental groups. The control group wore a cock-up orthosis and the experimental group wore a three-dimensional-printed wrist orthosis for 1 week. The Patient-Rated Wrist Evaluation, J
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Avrin, Leila. "Hebraica Now! The Book Arts, 1991-1993." Judaica Librarianship 8, no. 1 (1994): 154–61. http://dx.doi.org/10.14263/2330-2976.1261.

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There have been several positive developments in the areas of Hebrew typography, fine and private printing, and artists' books from 1991 to 1993. The paper discusses recent typefaces by the Jerusalem designer Zvi Narkiss; the typographic experiments of Ariel Wardi, former head of the Printing Department of Hadassah College of Technology in Jerusalem, as well as a new Hebrew display letter, "Hillel," designed by Scott-Martin Kosofsky for the Harvard Hillel Sabbath Songbook. The works of two private presses are examined: that of the Santa Monica private printer Jacob Samuel in a book illustrated
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Păcurar, Răzvan, Ancuţa Păcurar, Florin Popişter, and Anca Popişter. "Finite Element Analysis to Improve the Accuracy of ABS Plastic Parts Made by Desktop 3D Printing Method." Applied Mechanics and Materials 760 (May 2015): 509–14. http://dx.doi.org/10.4028/www.scientific.net/amm.760.509.

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The development of low-cost desktop versions of three-dimensional (3D) printers has made these devices widely accessible for rapid prototyping and small-scale manufacturing in home and office settings. Many desktop 3D printers rely fused deposition modeling process, that it is based on heated thermoplastic filiform material that it is extrused through a nozzle and deposited afterwards onto a heated building platform. The extruding accuracy in part fabrication is subject to transmission machinery and filament diameter on one hand and the technological parameters that are used in the manufacturi
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Ahmad, Mohd Nazri, and Abdullah Yahya. "Effects of 3D Printing Parameters on Mechanical Properties of ABS Samples." Designs 7, no. 6 (2023): 136. http://dx.doi.org/10.3390/designs7060136.

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The most modern technique utilized to create intricate manufactured parts for a variety of applications is called additive manufacturing (AM). Fused deposition modeling (FDM) has been acknowledged as the greatest consideration in the development and industrial sectors. The main objective of this study was to investigate how printing factors affected the mechanical characteristics of printed samples. Samples were produced via an FDM 3D printer in compliance with an ASTM D638 using a variety of input settings, including orientation, layer thickness, speed, and infill pattern. Tensile tests and m
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20

Wolterink, Gerjan, Pedro Dias, Remco G. P. Sanders, et al. "Development of Soft sEMG Sensing Structures Using 3D-Printing Technologies." Sensors 20, no. 15 (2020): 4292. http://dx.doi.org/10.3390/s20154292.

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3D printing of soft EMG sensing structures enables the creation of personalized sensing structures that can be potentially integrated in prosthetic, assistive and other devices. We developed and characterized flexible carbon-black doped TPU-based sEMG sensing structures. The structures are directly 3D-printed without the need for an additional post-processing step using a low-cost, consumer grade multi-material FDM printer. A comparison between the gold standard Ag/AgCl gel electrodes and the 3D-printed EMG electrodes with a comparable contact area shows that there is no significant difference
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Mou, Younss Ait, and Muammer Koc. "Dimensional capability of selected 3DP technologies." Rapid Prototyping Journal 25, no. 5 (2019): 915–24. http://dx.doi.org/10.1108/rpj-03-2019-0061.

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Purpose This paper aims to report on the findings of an investigation to compare three different three-dimensional printing (3DP) or additive manufacturing technologies [i.e. fused deposition modeling (FDM), stereolithography (SLA) and material jetting (MJ)] and four different equipment (FDM, SLA, MJP 2600 and Object 260) in terms of their dimensional process capability (dimensional accuracy and surface roughness). It provides a comprehensive and comparative understanding about the level of attainable dimensional accuracy, repeatability and surface roughness of commonly used 3DP technologies.
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Poier, Paloma Hohmann, Rodrigo Pulido Arce, Gabriel Chemin Rosenmann, Maria Gabriela Reis Carvalho, Leandra Ulbricht, and José Aguiomar Foggiatto. "Development of modular wrist, hand and finger orthesis by additive manufacturing." Research, Society and Development 10, no. 15 (2021): e333101522707. http://dx.doi.org/10.33448/rsd-v10i15.22707.

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Additive Manufacturing (AM) has been considered an innovative technology for the development of orthoses. Even so, the use of AM, utilizing low cost rigid and flexible material which can be used in different ways by the same user, to produce a modular orthosis has yet to be explored. Purpose: Develop a modular wrist, hand and finger orthosis that can be utilized as a functional or static orthosis, depending on the therapeutic objective. This being produced by low cost Additive Manufacturing, through a single anatomy acquisition process. Approach: Firstly, requirements for modularization and de
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Alsoufi, Mohammad, and Abdulrhman Elsayed. "Quantitative analysis of 0% infill density surface profile of printed part fabricated by personal FDM 3D printer." International Journal of Engineering & Technology 7, no. 1 (2018): 44. http://dx.doi.org/10.14419/ijet.v7i1.8345.

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Fused deposition modeling or FDM technology is an additive manufacturing (AM) technology commonly used for prototyping applications which suffer seriously from low levels of fluctuated surface finish quality, demanding some hand finishing tool for even the necessary levels of 3D printed parts. This paper, therefore, aims at giving close attention to the variation in the surface roughness profile between the inner and the outer faces of FDM 3D printed parts based on advanced polylactic acid (PLA+) thermoplastic filament material. The surface roughness is quantitatively analyzed using a contact-t
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HIRANO, Yasuyuki, Yuuki MISHIMA, and Ryuta OZAWA. "3P1-R03 Development of a simple assembly robotic hand with 3D printer(Robot Hand Mechanism and Grasping Strategy (1))." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2014 (2014): _3P1—R03_1—_3P1—R03_2. http://dx.doi.org/10.1299/jsmermd.2014._3p1-r03_1.

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Nishikawa, Kotaro, Kentaro Hirata, and Masahiro Takaiwa. "Development of Self-Powered 5-Finger Pneumatically Driven Hand Prosthesis Using Supination of Forearm." Journal of Robotics and Mechatronics 34, no. 2 (2022): 454–65. http://dx.doi.org/10.20965/jrm.2022.p0454.

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Recently, myoelectric hand prostheses produced by the combination of 3D-CAD and printer have gained attention. 3D printing of hand prosthesis has resulted in cost reduction. However, when an electric actuator with reduction gears is used as the driving source of the hand prosthesis, the joint rigidity becomes high; therefore, compliance control is required to grasp soft target objects. In this study, we propose a pneumatically driven hand prosthesis using a flexible bellows actuator. The hand prosthesis is lightweight and inexpensive because it is self-powered and generates compressed air thro
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Devaraja, Rahul Raj, Rytis Maskeliūnas, and Robertas Damaševičius. "Design and Evaluation of Anthropomorphic Robotic Hand for Object Grasping and Shape Recognition." Computers 10, no. 1 (2020): 1. http://dx.doi.org/10.3390/computers10010001.

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We developed an anthropomorphic multi-finger artificial hand for a fine-scale object grasping task, sensing the grasped object’s shape. The robotic hand was created using the 3D printer and has the servo bed for stand-alone finger movement. The data containing the robotic fingers’ angular position are acquired using the Leap Motion device, and a hybrid Support Vector Machine (SVM) classifier is used for object shape identification. We trained the designed robotic hand on a few monotonous convex-shaped items similar to everyday objects (ball, cylinder, and rectangular box) using supervised lear
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Ismail, Rifky, Rilo Berdin Taqriban, Mochammad Ariyanto, et al. "Affordable and Faster Transradial Prosthetic Socket Production Using Photogrammetry and 3D Printing." Electronics 9, no. 9 (2020): 1456. http://dx.doi.org/10.3390/electronics9091456.

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This study aims to invent a new, low-cost, and faster method of prosthetic socket fabrication, especially in Indonesia. In this paper, the photogrammetry with the 3D printing method is introduced as the new applicative way for transradial prosthetic making. Photogrammetry is used to retrieve a 3D model of the amputated hand stump using a digital camera. A digital camera is used for photogrammetry technique and the resulting 3D model is printed using a circular 3D printer with Polylactic acid (PLA) material. The conventional casting socket fabrication method was also conducted in this study as
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Jackson, Brandon, Kamran Fouladi, and Babak Eslami. "Multi-Parameter Optimization of 3D Printing Condition for Enhanced Quality and Strength." Polymers 14, no. 8 (2022): 1586. http://dx.doi.org/10.3390/polym14081586.

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Fused deposition modeling (FDM) 3D printing is the most common type of additive manufacturing available in both research and the industry. Due to the rapid development of 3D printing, there is now a significant need to fabricate parts with higher quality with respect to cosmetics, precision, and strength of the final products. This work is focused on finding the optimal printing condition for a commercially available 3D printer and filament material (i.e., Polylactic acid (PLA)). In this work, we focus on finding the combined effect of retraction speed, deposition angle, and number of walls on
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Jaber, Haneen Mahdi, Muhammed Abdul -Sattar, and Nabel Kadhim Abd al-Sahib. "Developing a Prosthesis Design using A Gearbox to Replicate the Human Hand Mechanism." Al-Khwarizmi Engineering Journal 16, no. 2 (2020): 24–33. http://dx.doi.org/10.22153/kej.2020.04.001.

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Prosthetic is an artificial tool that replaces a member of the human frame that is absent because of ailment, damage, or distortion. The current research activities in Iraq draw interest to the upper limb discipline because of the growth in the number of amputees. Thus, it becomes necessary to increase researches in this subject to help in reducing the struggling patients. This paper describes the design and development of a prosthesis for people able and wear them from persons who have amputation in the hands. This design is composed of a hand with five fingers moving by means of a gearbox is
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Brewin, Robert, Thomas Brewin, Joseph Phillips, et al. "A Printable Device for Measuring Clarity and Colour in Lake and Nearshore Waters." Sensors 19, no. 4 (2019): 936. http://dx.doi.org/10.3390/s19040936.

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Two expanding areas of science and technology are citizen science and three-dimensional (3D) printing. Citizen science has a proven capability to generate reliable data and contribute to unexpected scientific discovery. It can put science into the hands of the citizens, increasing understanding, promoting environmental stewardship, and leading to the production of large databases for use in environmental monitoring. 3D printing has the potential to create cheap, bespoke scientific instruments that have formerly required dedicated facilities to assemble. It can put instrument manufacturing into
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Liu, Xinhua, Xianhua Zheng, and Shengpeng Li. "Development of a humanoid robot hand with coupling four-bar linkage." Advances in Mechanical Engineering 9, no. 1 (2017): 168781401668631. http://dx.doi.org/10.1177/1687814016686313.

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To improve the operating performance of robots’ end-effector, a humanoid robot hand based on coupling four-bar linkage was designed. An improved transmission system was proposed for the base joint of the thumb. Thus, a far greater motion range and more reasonable layout of the palm were obtained. Moreover, the mathematical model for kinematics simulation was presented based on the Assur linkage group theory to verify and optimize the proposed structure. To research the motion relationships between the fingers and the object in the process of grasping object, the grasping analysis of multi-fing
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Ding, Shirun, and Bing Feng Ng. "Particle emission levels in the user operating environment of powder, ink and filament-based 3D printers." Rapid Prototyping Journal 27, no. 6 (2021): 1124–32. http://dx.doi.org/10.1108/rpj-02-2020-0039.

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Purpose This study aims to examine on-site particle concentration levels due to emissions from a wide spectrum of additive manufacturing techniques, including polymer-based material extrusion, metal and polymer-based powder bed fusion, directed energy deposition and ink-based material jetting. Design/methodology/approach Particle concentrations in the operating environments of users were measured using a combination of particle sizers including the TSI 3910 Nano SMPS (10–420 nm) and the TSI 3330 optical particle sizer (0.3–10 µm). Also, fumes from a MEX printer during printing were directly ca
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Gedik, Ebru, and Abdullah Toğay. "Association crafter approach with technology: Customized product design with 3d printer." New Trends and Issues Proceedings on Humanities and Social Sciences 2, no. 1 (2016): 584–94. http://dx.doi.org/10.18844/prosoc.v2i1.512.

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Before the industrial revolution, production had been taking place on the basis of craft, products had been designing and producing specifically to people. İn time, diversifying and expanding consumer needs had led to the evolution of mechanical production to the production of hand. The mass production associated with the industrial revolution had made it possible to produce many of the same products and cheaply. Initially ,this new mode of production maked easier to be able to access the objects but eventually human beings covered with surrounding objects had led to emergance concept of “m
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Belen, Aysu, Peyman Mahouti, Filiz Gunes, and Ozlem Tari. "Gain Enhancement of a Traditional Horn Antenna using 3D Printed Square-Shaped Multi-layer Dielectric Lens for X-band Applications." Applied Computational Electromagnetics Society 36, no. 2 (2021): 132–38. http://dx.doi.org/10.47037/2020.aces.j.360203.

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In this work, gain of a traditional horn antenna is enhanced up to 2.9 dB over X-band using 3D printed square-shaped multi-layer lens. For this purpose, firstly the multi-layer lenses are designed using Invasive Weed Optimization (IWO) and simulated in 3-D CST Microwave Studio (MWS) environment as consisting of square-shaped five layers with variable dielectric constants and heights. Thus, optimum values of the dielectric constants and heights are resulted limiting from 1.15 to 2.1 and 9.2 mm to 10 mm, respectively compatible for Fused Deposition Modeling (FDM) based 3D-printing process. Final
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Pierpaoli, Mattia, Chiara Giosuè, Natalia Czerwińska, et al. "Characterization and Filtration Efficiency of Sustainable PLA Fibers Obtained via a Hybrid 3D-Printed/Electrospinning Technique." Materials 14, no. 22 (2021): 6766. http://dx.doi.org/10.3390/ma14226766.

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The enormous world demand for personal protective equipment to face the current SARS-CoV-2 epidemic has revealed two main weaknesses. On one hand, centralized production led to an initial shortage of respirators; on the other hand, the world demand for single-use equipment has had a direct and inevitable effect on the environment. Polylactide (PLA) is a biodegradable, biocompatible, and renewable thermoplastic polyester, mainly derived from corn starch. Electrospinning is an established and reproducible method to obtain nano- and microfibrous materials with a simple apparatus, characterized by
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Selleslach, Kristof. "A Reliability Check of Privilege Summaries Printed by Balthasar Moretus I (1610-1641)." Early Modern Low Countries 8, no. 2 (2024): 206–28. https://doi.org/10.51750/emlc20858.

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Publishers rarely provided the full text of a privilege in their books, instead offering only a summary, often in the language of the publication. Previous research has proved in one instance that the Antwerp printer Balthasar Moretus I (1574-1641) printed a summary which reflected his own desires rather than the terms of the privilege itself: he extended its territorial scope from the Duchy of Brabant to the entire Habsburg Netherlands, and he even cited his mother as a grantee. This incident raises the question how reliable the summaries of printer’s privileges were. For publishers in the Ha
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Razumov-Fryziuk, I. A., D. V. Gurin, D. O. Nikitin, R. Ye Strilets, and D. S. Blyzniuk. "Modeling a screw extruder for FFF 3D printing." Radiotekhnika, no. 209 (June 24, 2022): 206–14. http://dx.doi.org/10.30837/rt.2022.2.209.21.

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The article presents the development and modeling of a screw extruder for 3D printers operating on the FFF technology, namely, the Fused Filament Fabrication (“production by fusing threads”). Extruders, usually installed on FFF 3D printers, use a thermoplastic polymer filament as a material. There are two filament standards: 1.75mm and 2.85mm. The minimum cost of such a filament starts from $ 11 per kilogram (ABS plastic 1.75 mm). The cost of more expensive filaments can reach several thousand or even tens of thousands per kilogram (depending on the material, filler, the presence of inhibitors
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Halama, Ota. "Biblické ilustrace Jana Konůpka." Acta Musei Nationalis Pragae – Historia litterarum 68, no. 3-4 (2024): 35–47. http://dx.doi.org/10.37520/amnpsc.2023.0023.

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In the 19th century, illustrated Bibles reappeared in the Czech environment. On the one hand, these were illustrations taken from the milieu of the Nazarene movement, combining admiration for the old Renaissance and Baroque masters with modern works. On the other hand, particular popularity among Czech Catholics as well as Protestants was enjoyed by the illustrations of Gustave Doré. At the beginning of the 20th century, the circle of Czech bibliophiles conceived the idea of commissioning a completely Czech illustrated Bible. It was implemented in 1936–1939 through the efforts of the private p
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Michal, Pavol, Milan Vaško, Milan Sapieta, Jaroslav Majko, and Jakub Fiačan. "The Impact of Internal Structure Changes on the Damping Properties of 3D-Printed Composite Material." Applied Sciences 14, no. 13 (2024): 5701. http://dx.doi.org/10.3390/app14135701.

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This article investigates the impact of changes in the internal structure of composite materials on their dynamic properties. The present research focuses on 3D-printed specimens with different reinforcement fiber arrangements. The specimens are printed on a Markforged Mark Two 3D printer. The base material is nylon filled with chopped carbon fibers (Onyx) and the reinforcement is in the form of long carbon, glass and Kevlar fibers. The experiment is carried out by the impact method. The principle of this method is to expose the specimen to a short impulse of force while monitoring its frequen
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Fan, Qinguo, Hongxia Xue, and Yong K. Kim. "Effect of UV Curable Pretreatments on the Color Quality of Inkjet Printed Polyester Fabrics." Research Journal of Textile and Apparel 12, no. 1 (2008): 1–8. http://dx.doi.org/10.1108/rjta-12-01-2008-b001.

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Woven and knitted polyester fabrics were pretreated with formulations containing waterborne UV curable resins and silica particles to improve inkjet print quality. The selected formulations were applied with low add-on to reduce the adverse effect on fabric hand without sacrificing the print quality. A print pattern with block areas and lines in cyan, magenta, yellow, and black colors was designed and inkjet printed on the pretreated fabrics with a wide-format inkjet printer (Encad Novajet 750) to investigate the effects of the UV curable pretreatment on the inkjet print color qualities includ
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Yilmaz, Musa, and Necip Fazil Yilmaz. "Effects of raster angle in single- and multi-oriented layers for the production of polyetherimide (PEI/ULTEM 1010) parts with fused deposition modelling." Materials Testing 64, no. 11 (2022): 1651–61. http://dx.doi.org/10.1515/mt-2022-0085.

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Abstract Material type and part deposition orientation are two important concerns in additive manufacturing. Additive manufacturing methods utilized by the industry are generally based on polylactic acid (PLA) or acrylonitrile butadiene styrene (ABS) materials using the fused deposition modelling (FDM) method. However, in present commercial applications, besides extensive use of PLA/ABS, their low strength has emerged as their biggest disadvantage. However, polyetherimide (PEI)/ULTEM 1010 parts represent high-performance engineering thermoplastics and offer superior mechanical properties with
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Nugroho, Yohanes Eko. "Kit Hand Made Berbahan Limbah untuk Meningkatkan Kompetensi Alat Optik." Jurnal Penelitian Pembelajaran Fisika 9, no. 1 (2018): 45. http://dx.doi.org/10.26877/jp2f.v9i1.2346.

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There are two problems that underlie the classroom action research. First, the learning process is still dominated by lectures method and less empowering environment to develop the lesson materials. As a result, student competence is still far from expectations. Based on preliminary observations, in terms of daily test results VIII C grade on the subject matter “reflection and refraction of light”, indicating learning outcomes are still low. Classical completeness only reached 33.33% is still far from the minimum limit is 75%, and the average value of daily tests only 66.85, it is still far mi
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KUTANI, Keigo, Sadao KAWAMURA, and Zhongkui WANG. "High-Speed Grasping and Transfer of Fragile Food by Soft Hand Fabricated Using Liquid Silicone 3D Printer." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2023 (2023): 2P1—I09. http://dx.doi.org/10.1299/jsmermd.2023.2p1-i09.

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Łukaszewski, Krzysztof, Radosław Wichniarek, and Filip Górski. "Determination of the Elasticity Modulus of Additively Manufactured Wrist Hand Orthoses." Materials 13, no. 19 (2020): 4379. http://dx.doi.org/10.3390/ma13194379.

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The article describes the experimental and simulation research on the material properties of the individualized wrist orthoses produced in the additive manufacturing (AM) process by the fused filament fabrication (FFF) method. The authors produced a series of standard (normalized) samples for three-point bending from acrylonitrile butadiene styrene (ABS) filament on a low-budget 3D printer and a series of samples in the shape of a fragment of the orthosis and the entire orthosis. All types of samples were subjected to experimental tests on a universal testing machine, which allowed us to deter
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Torah, Russel, Yang Wei, Neil Grabham, et al. "Enabling platform technology for smart fabric design and printing." Journal of Engineered Fibers and Fabrics 14 (January 2019): 155892501984590. http://dx.doi.org/10.1177/1558925019845903.

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A hardware and software platform is presented enabling the design, and realisation via printing, of smart fabrics. The cultural and creative industries are an important economic area within which designers frequently utilise fabrics. Smart fabrics offer further creative opportunities to the cultural and creative industries, but designers often lack the required specialist knowledge, in electronics, software and materials, to produce smart fabrics. The software platform offers the ability to perform design, layout and visualisation of a smart fabric using a library of standard smart fabric func
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Yurchenko, A. V. "Formation of the database using the results of mechanical testing of the samples obtained by additive technologies." Industrial laboratory. Diagnostics of materials 86, no. 10 (2020): 56–65. http://dx.doi.org/10.26896/1028-6861-2020-86-10-56-65.

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We present methodological developments and approach to the formation of the database proceeding from the results of mechanical tests of the samples obtained by Fused Deposition Method (FDM) on a Fortus 380 mc 3D-printer using ABS-plastic. The material of 3D-printed structures reveals a natural anisotropy of the mechanical characteristics which are to be studied prior to developing of the mathematical models. Such studies are always limited by the goals and capabilities of researchers, on the one hand, but, on the other hand, they are aimed at sharing and integrating of the results obtained by
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Rijckaert, Sander, Lode Daelemans, Ludwig Cardon, Matthieu Boone, Wim Van Paepegem, and Karen De Clerck. "Continuous Fiber-Reinforced Aramid/PETG 3D-Printed Composites with High Fiber Loading through Fused Filament Fabrication." Polymers 14, no. 2 (2022): 298. http://dx.doi.org/10.3390/polym14020298.

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Recent development in the field of additive manufacturing, also known as three-dimensional (3D) printing, has allowed for the incorporation of continuous fiber reinforcement into 3D-printed polymer parts. These fiber reinforcements allow for the improvement of the mechanical properties, but compared to traditionally produced composite materials, the fiber volume fraction often remains low. This study aims to evaluate the in-nozzle impregnation of continuous aramid fiber reinforcement with glycol-modified polyethylene terephthalate (PETG) using a modified, low-cost, tabletop 3D printer. We anal
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Łukaszewski, Krzysztof, Ratnesh Raj, and Anna Karwasz. "Mechanical Evaluation of PET-G 3D-Printed Wrist-Hand Orthosis: An Integrated Experimental and Numerical Approach." Materials 16, no. 18 (2023): 6132. http://dx.doi.org/10.3390/ma16186132.

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Limb injuries frequently necessitate orthotic bracing, and the utilization of material extrusion (MEX) additive manufacturing (AM) or 3D printing offers a rapid and cost-effective means of producing orthoses. These characteristics are highly sought after in today’s orthotic market. The study focused on the mechanical strength analysis of the wrist-hand orthosis (WHO) made of PET-G filament. Experimental testing and simulation were employed to assess the properties of individualized wrist orthoses fabricated through the MEX AM process. Standard three-point bending samples were manufactured usin
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Sanchez-Barra, Angel, Gonzalo Zambrano-Narvaez, and Rick Chalaturnyk. "An In-Depth Analysis of Strength and Stiffness Variability in 3D-Printed Sandstones: Implications for Geomechanics." Energies 16, no. 14 (2023): 5406. http://dx.doi.org/10.3390/en16145406.

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Natural rocks are highly heterogeneous due to various geological processes that constantly alter their properties. The accumulation, deposition, and cementation of mineral and organic particles continuously modify the spatial characteristics of rock properties. Property variability or anisotropy is commonly observed in most rock types and influences strength, transport, and thermal conductivity behavior. This unpredictability presents a significant challenge for laboratory testing. Binder-jet additive manufacturing (3D printing) has emerged as a valuable technology for characterizing rock prop
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Chen, Yi Ping, and Ming Der Yang. "Micro-Scale Manufacture of 3D Printing." Applied Mechanics and Materials 670-671 (October 2014): 936–41. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.936.

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3D printing as additive manufacturing enables to give concept proposers and designers a great possibility of producing physical parts and concept models at acceptable cost during a short time. Such technology is quite distinct from traditional machining techniques adopting subtractive process. The purpose of this study is to briefly describe new micro-scale manufacture utilizing a series of process of 3D printing, including 3D modeling, 3D model slicing, printing, and products. Especially, 3D modeling is one of major components in 3D printing process and becomes a barrier to entry the business
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