Printing - Science topic

The existence of joints or other kinds of discontinuities has a dramatic effect on the stability of rock excavations and engineering. As a result, a great challenge in rock mass mechanics testing is to prepare rock or rock-like samples with defects. In recent years, 3D printing technology has become a promising tool in the field of rock mass mechan...

3D printing of cementitious materials or concrete (3DCP) has developed unbelievably in past 10 years and has the potential to revolutionize the concrete industry completely in the couple of incoming decades. Compared to cast concrete, 3DCP technology has a high customizability of architectural and structural design; can reduce material consumption,...

This study investigates the mechanism of fibre deposition in conventional 3D printing and presents an aligned fibre deposition (AFD) method to improve the fibre placement. The deposition mechanism reveals that the cracking of the filament in the transition zone and the torsional deformation during the steering path are the main cause of the defects...

Four-dimensional (4D) printing is a promising technology that provides solutions for compelling needs in various fields. Most of the reported 4D printed systems are based on the temporal shape transformation of printed subjects. Induction of temporal heterogenicity in functions in addition to shape may extend the scope of 4D printing. Herein, we re...

Due to easy access, faster production, and on-demand printing, the applications of 3D printing are proliferating and reaching the mass customization level where individuals can print their self-design products. Many service providers emerge and supply 3D printers to allow mass customization within their specific service areas. Along with the techno...

This action research is a backup of a current plan following the Deped Order No. 018 s. 2020, Policy Guidelines for the Provision of Learning Resources in the Implementation of the Basic Education Learning Continuity Plan. To address the challenges posed in the delivery of education in the Department of Education (DepEd), schools adopted various mo...

A R T I C L E I N F O Keywords: Electron beam freeform fabricate Shape memory effect Phase transformation Microstructure evolution A B S T R A C T Compared to the traditional additive manufacturing techniques, the electron beam freeform fabrication (EBF 3), is carried out in a vacuum atmosphere, indicating its superiority in the manufacturing of el...

Hydrogels with different functionalities such as printability, antifreezing properties, adhesion, biocompatibility, and toughness are being continually developed. However, it has been extremely challenging to design adhesive, antifreezing, tough, and biocompatible multifunctional hydrogels with complex shapes simultaneously and prepare them in a sh...

In this research the potential of using polymer punches in a deep drawing process to realize stainless steel cups having diameter equal to 40 mm and drawing depth equal to 18 mm was investigated. Punches have been Additive Manufacturing printed following two different orientations (horizontal and vertical) and two different wire orientations with r...

3D printing is gaining traction in research and development as a way to quickly, cheaply, and easily manufacture polydimethylsiloxane (PDMS) molds. The most commonly used method is resin printing, which is relatively expensive and requires specialized printers. This study shows that polylactic acid (PLA) filament printing is a cheaper, more readily...

The orientalists have great efforts in studying the Islamic and Arab heritage, and the Germans have a special interest in the Holy Qur'an, its history, readings, and drawing. This research is an attempt to show the care of the oriental orientalism of the Qur'anic readings since the beginning of the orientalist movement. The printing of the Holy Qur...

The efficiency of the fabrication and the cost of feedstock materials are important constraining factors for a wider application of the laser powder bed fusion (LPBF) process in the industry. Therefore, it is necessary to investigate the feasibility of using different particle size distributions (PSD) combined with higher layer thickness for achiev...

The direct ink writing (DIW) method of 3D-printing liquid resins has shown promising results in various applications such as flexible electronics, medical devices, and soft robots. A cost-effective extrusion system for a two-part high-viscous resin is developed in this article to fabricate soft and immensely stretchable structures. A static mixer c...

The journey of copyright protection that started with the printing press in the 16th century entered a new era of challenges with the technological advancement of the 21st century. Copyright has rights and enforcement that are grounded in legislative enactments. This paper advocates that A. I.-produced work is original and deserves copyright protec...

Multi-material manufacturing through the hybridisation of printed electronics and additive manufacturing has gained great interest recently. However, such hybridisation attempts are not trivial due to the need for functional material development and compatible process identification, as well as further performance understanding, comprehensive chara...

Additive manufacturing of shape memory polymers has gained tremendous interest in recent years due to their versatile potential applications in various industries, such as biomedicine and aerospace. However, the polymers' mechanical properties, specifically stiffness and strength, often hinder their use in mechanically demanding applications, e.g....

Metal foams, which are similar to other types of foam materials, are composed of solid material with a significant proportion of the volume consisting of pores. Although metal foams retain some of the properties of the original material, they also possess several advantageous characteristics such as low density and thermal conductivity, high specif...

There is increased interest in recent literature on the disfluency effect in an effort to contextualize the outcomes for typography research that is grounded in functional readability. Recently, a small group of typographic and legibility researchers have begun to call for more collaboration to generate knowledge that is useful and practical ( Thie...

Citation: Gorobtsov, P.Y.; Simonenko, T.L.; Simonenko, N.P.; Simonenko, E.P.; Kuznetsov, N.T. Preparation of V 2 O 5 Thin Film by Sol-Gel Technique and Pen Plotter Printing. Colloids Interfaces 2023, 7, 20. https:// Abstract: The work is dedicated to study of thin V 2 O 5 film formation by pen plotter printing using vanadyl alkoxyacetylacetonate as...

The additive manufacturing system using the continuous liquid interface production (CLIP) method, which was designed and constructed by the researchers of this article, was utilized in this research to examine the impacts of the oxygen control area's thickness on the speed of producing parts. The main goal of this research is to produce porous part...

Patterning is attractive for nanofabrication, electron devices, and bioengineering. However, achieving the molecular-scale patterns to meet the demands of these fields is challenging. Here, we propose a bubble-template molecular printing concept by introducing the ultrathin liquid film of bubble walls to confine the self-assembly of molecules and a...

Considering the great increase in the use of additive manufacturing, new types of materials are being studied for the most diverse applications. The insertion of blowing agents in polymeric matrices, such as CO2 and N2, aiming at reducing the density of these materials, has been studied by several authors. Recently, low-density polylactic acid flam...

Thermoelectric generators (TEGs) convert temperature differences into electrical power and are attractive among energy harvesting devices due to their autonomous and silent operation. While thermoelectric materials have undergone substantial improvements in material properties, a reliable and cost-effective fabrication method suitable for micrograv...

In the biomedical industry, tricalcium phosphate is a bioceramic substance that is frequently employed in the fabrication of scaffolds and bone structures. Fabrication of porous ceramic structures using conventional manufacturing techniques is very challenging because of the brittle nature of the ceramics, which has led to a newly adapted direct in...

: translating acronyms of media and international (& world) organizations helps the researcher to draw the following conclusions:1- Acronyms of world news agencies can be translated into Arabic in three ways: by indicating the lexical meaning; by indicating English abbreviated form as letter by letter & by indicating Arabic abbreviated form as a wo...

To use Ag nanowires for various industries, it is crucial to develop an appropriate patterning method. There are various types of patterning methods, but there has been no comprehensive review discussing and summarizing them. This review paper provides an overview of the various patterning techniques of Ag nanowire electrodes, including photolithog...

Human organoids have potential to revolutionize in vitro disease modeling by providing multicellular architecture and function that are similar to those in vivo. This innovative and evolving technology, however, still suffers from assay throughput and reproducibility to enable high-throughput screening (HTS) of compounds due to cumbersome organoid...

4D printing is a cutting-edge technology that allows for the creation of dynamic, self-assembling structures by utilizing cutting edge, newly introduced smart materials. It builds upon traditional 3D printing by adding the dimension of time, allowing printed objects to change shape or behavior over time. This is achieved through the use of smart ma...

The Internet of Things (IoT) can form state-of-the-art in the healthcare domain. Thus, during the COVID-19 situation, various application-based work has to be studied and deployed to enable an IoT-based health framework. Based on this, a clear analysis is needed for the research track. Various works based on IoT in healthcare and COVID-19 Disease a...

This research aims to elicit Quranic purposes from the field interpretation of Sheikh Abdul Rahman Hasaan Habanka Al-Maidani by studying Surat Al-Asr, Al-Adiyat, Al-Kawthar, and Al-Takathur as a model. The knowledge of the purposes of the surahs leads to the realization of some of the notable purposes of the revelation of the Quran, the considerati...

Experimental and computational studies were conducted to predict failure loads of specimens containing different-sized holes made using the additive manufacturing (AM) technique. Two different types of test specimens were prepared. Flat specimens, manufactured from polylactic acid (PLA), were subjected to uniaxial loading. Tubular specimens, made o...

We propose the use of an n-doped periodic AlN/GaN quantum cascade structure for the optical up-conversion of multiple mid-infrared (mid-IR) photons into deep-ultraviolet (deep-UV) radiation. Without applying an external bias voltage, the active region of such a device will (similar to an un-biased quantum cascade laser) resemble a sawtooth-shaped i...

This in-vitro study aimed to evaluate the influence of the printing orientation on parallelism, distance, and thickness between adjacent cylinders of 3D-printed surgical guides. CAD software was used to design a surgical guide with two adjacent parallel cylinders (reference); the design was saved as standard tessellation software (STL) and 63 sampl...

“As per the SNS Insider Research, the Digital Textile Printing Inks Market size was valued at US$ 1496.5 Mm in 2022, and is Projected to reach US$ 3302.5 Mm by 2030, with growing healthy CAGR of 10.4% over the Forecast Period 2023-2030.”

Extrusion-based bioprinting is a widely used approach to construct artificial organs or tissues in the medical fields due to its easy operation and good ability to combine multi-material. Nevertheless, the current technology is limited to some printing errors when combining multi-material printing, including mismatch between printing filaments of d...

Gravure printing is widely used in food, pharmaceutical, and other packaging industries. As a green printing material, water-based ink has problems such as non-volatile and poor drying on non-absorbent packaging substrates, which has a great impact on its application. To solve these difficulties, this study adopts the volume of fluid (VOF) method a...

Purpose: This technical procedure report explains the fabrication protocol for a newly developed 4D-printed sports mouthguard (MG) based on 4D-printing technology. Methods: An intraoral scanner was used to scan a maxillary arch model. A two-layer sports MG was designed based on the scanned model using computer-aided design software and output in a...

A new method named implicit pseudo-spectral arrays (IPSA) was developed to obtain the numerical solution and plot it as a three-dimensional (3D) pattern. These results were used to elaborate the computational simulation of the spatiotemporal dynamics of the Swift-Hohenberg equation (SHE) of quintic order. Numerical solutions are employed as complex...

Egypt is ranked in the first place among the top five date producing countries in the world according the latest report 2020. The leaf (jarid in Arabic), which is (palm fronds) is one of the most important and untapped local resources that, (through recycling, Up cycling, re-use and all the sustainability development strategies and tools), could pr...

Additive manufacturing (AM) technologies have transformed manufacturing, by providing greater control over material deposition and consumption. Thanks to greater customization and their high strength-to-mass ratio, the AM of composite materials has significantly grown over the past few years. The main focus in this research area is improving printi...

Flexible electronic devices are widely used in automobile, healthcare, space exploration, oil and gas, and marine industries, etc. Owing to the broad application areas, they are exposed to harsh environmental conditions that inhibit their stable performance. Thus, there is a need to develop flexible electronic devices that can sustain these conditi...

3D printing of continuous fiber reinforce plastics (CCFRP) with fused deposition modeling is a burgeoning manufacturing method because of its exceptional mechanical properties. Nevertheless, it cannot manufacture parts at high speeds. Using laser heating instead of the traditional resistive heating in 3D printing of CCFRP has the potential to impro...

Reports from the academy often refer that students arrive at the final stage of the bachelor's degree in educational inclusion with deficiencies in writing skills. To favor students' writing skills, we used Célestin Freinet's free text technique -the free text- publishing the writings in the student magazine "Volando clase." The result allowed us t...

Resolving the contradictions between the pumping and deposition process still remain as a bottleneck in 3D concrete printing. Fluidity retention is beneficial for pumping operations, while fast stiffening after extrusion is indispensable for a high construction rate. To overcome this drawback, an inline mixing strategy, named twin-pipe pumping, usi...

Delicate geometries and suitable mechanical properties are essential for device applications of polymer materials. 3D printing offers unprecedented versatility, but the geometries and mechanical properties are typically fixed after printing. Here, we report a 3D photo-printable dynamic covalent network that can undergo two independently controllabl...

Selective Paste Intrusion (SPI) is an additive manufacturing (AM) process in which thin layers of aggregates are selectively bonded by cement paste only where the structure is to be produced. In this way, concrete elements with complex geometries and structures can be created. Reinforcement is required to increase the flexural strength of the concr...

Roll-to-roll gravure (R2Rg) has become highly affiliated with printed electronics in the past few years due to its high yield of printed thin-film transistor (TFT) in active matrix devices, and to its low cost. For printing TFTs with multilayer structures, achieving a high-precision in overlay printing registration accuracy (OPRA) is a key challeng...

Spearing mantis shrimps are aggressive crustaceans using specialized appendages with sharp spikes to capture fishes with fast movement. Each spike is a biological tool that has to combine high toughness, as required by the initial impact with the victim, with high stiffness and strength, to ensure sufficient penetration while avoid breaking. We per...

We introduce the idea of beneficiary framing to the promotion response literature. Two large-scale field experiments (total N = 73,010) in the context of print-at-home coupons show that framing a savings message as affecting a beneficiary (i.e., “save for X”) increases coupon printing and redemptions. This beneficiary framing effect is equivalent t...

High-technology businesses face severe competition in their respective industries, necessitating constant innovation of their systems through the infusion of new technologies. To this end, these companies incorporate multiple technologies into new successful systems to improve key requirements that can ultimately affect the overall revenue and prof...

Security features are topographies invisible to the naked eye, such as micro-printing or features visible in ultraviolet, transmitted, and oblique light. The present paper focuses on the examination of Indian currency notes such as 2000, 500, 200, 100, 50, 20, and10 in different light sources and with the help of a compound microscope. This kind of...

This paper incorporates the homogenization theory into non-penalized Smooth-Edged Material Distribution for Optimizing Topology (SEMDOT) algorithm to conduct the design of cellular structures with the maximum shear modulus. The parametric study and comparison with existing results obtained by BESO are carried out. The numerical examples in 2D and 3...

The mechanical and shape-recovery characteristics of 4D-printed thermally responsive shape-memory polyurethane (SMPU) reinforced with two types of reinforcements, multiwalled carbon nanotubes (MWCNTs) and Halloysite nanotubes (HNTs), are investigated in the present study. Three weight percentages of reinforcements (0, 0.5, and 1) in the SMPU matrix...

Reinforcement learning (RL) is a subfield of machine learning that has shown significant promise in improving the efficiency and quality of additive manufacturing (AM). Additive manufacturing, also known as 3D printing, is a process of building objects layer by layer using digital models. RL can help optimize the manufacturing process by allowing m...

The hydrothermal synthesis of nickel oxide in the presence of triethanolamine was studied. Furthermore, the relationship between the synthesis conditions, thermal behavior, crystal structure features, phase composition and microstructure of semi-products, and the target oxide nanopowders was established. The thermal behavior of the semi-products wa...

This study shows how a computational fluid dynamics (CFD) model can be used as a complementary approach to investigate the influence of processing parameters on the morphology of printed strands, in material extrusion additive manufacturing (AM). Experimental investigations were also realized to validate the numerical model. Both experiments and nu...

Citation: Leontiou, A.; Georgopoulos, S.; Karabagias, V.K.; Kehayias, G.; Karakassides, A.; Salmas, C.E.; Giannakas, A.E. Three-Dimensional Abstract: Three-dimensional (3D) printing has gained increasing attention for its unique ability to create geometrically complex designs, which not only can be used for mass manufacturing but also has environme...

Electrohydrodynamic jet (E-jet) printing has broad application prospects in the preparation of flexible electronics and optical devices. Ejection cycle time and droplet size are two key factors affecting E-jet-printing quality, but due to the complex process of E-jet printing, it remains a challenge to establish accurate relationships among ejectio...

Acrylonitrile butadiene styrene (ABS) is a multipurpose thermoplastic and the second most popular material in material extrusion (MEX) additive manufacturing (AM). It is widely used in various types of industrial applications in the automotive sector, housing, and food processing, among others. This work investigates the effect of seven generic con...

The review aimed at analyzing the evidence available on 3D printable materials and techniques used for the fabrication of orthodontic appliances, focusing on materials properties that are clinically relevant. MEDLINE/PubMed, Scopus, and Cochrane Library databases were searched. Starting from an initial retrieval of 669 citations, 47 articles were f...

The Internet Printing Protocol (IPP) is a bridge between hosts and printers, and is supported by more than 98 percent of printers today. In addition to supporting local use, the IPP protocol also supports online use. Although this can expand the scope of its application, it has also introduced potential risks to user data. IPP has security componen...

In this study, novel Zn catalysts were prepared by the wet impregnation method using printing and dyeing wastewater (PDW)-modified petroleum coke (petcoke) as a carrier, and they were applied to the acetylene acetoxylation. The pretreated petroleum coke has a high specific surface area which provides sufficient space for the loading of Zn. Calcinat...

Additive manufacturing of thermoset is attractive due to their superior stiffness, chemical resistance, and thermal stability. However, the slow curing rate of thermoset such as epoxy poses challenge in layer by layer printing. Traditionally, photoinitiators are incorporated in epoxy to enhance the curing rate using UV light. However, photo initiat...

Additive manufacturing (AM) of polymeric materials has allowed the manufacturing of complex structures for a wide range of applications. Among AM methods vat photopolymerization(VP) techniques are desired owing to their improved efficiency and printing resolution. Nevertheless, the major portion of resins available for VP are based on systems with...

Relevance: the relevance, declared in the article of the problem, and the time being discussed, based on theoretical analysis of scientific approaches, their generalization systematized theoretical and methodological bases of functioning of entertainment, and recreational facilities in the national economy, refined the concept of recreation and wel...