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Application of 3D printing concepts in the Architecture engineering and Construction (AEC) industry - A scientometric review

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Materials Today: Proceedings 2023年

作者： Prasad, K.v. vasugi, v. Senthil Kumaran, G. Hyderabad500101 India Vellore Institute of Technology Chennai600127 India The Copperbelt University Kitwe21692 Zambia

The construction industry builds the essential infrastructure and contributes to the economic development of any nation. The productivity of the construction industry has been lagging behind manufacturing for many decades. The COvID-19 pandemic has exposed the vulnerability of the industry and its severe dependencies on manual, labour-oriented practices. The industry needs to become resilient and rebound quickly to recover from the impacts of the pandemic. The 3D printing or additive manufacturing concept offers to automate the processes of construction, improve efficiencies in design & construction, reduce wastage and sustainable development. The present paper intends to summarize the developments, trends, and application areas through a scientometric review. Research articles were obtained from the Scopus database. The USA leads the research studies followed by China, Australia, the UK and Germany. 339 documents were obtained from the initial search. These were systematically filtered for review through the PRISMA framework. The screened 193 articles were quantitatively analyzed through the vOS viewer software. The study summarizes the current research trends, themes, and future research trends. The study contributes to the existing body of knowledge and intends to raise awareness of the concept and encourage researchers and practitioners to adopt the concept on a larger scale, especially in India. © 2023

关键词： 3D printing

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Integrated design of emulsified cosmetic products: A review

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CHEMICAL engineering RESEARCH & design 2020年 161卷 279-303页

作者： Calvo, Fernando Gomez, Jorge M. Ricardez-Sandoval, Luis Alvarez, Oscar Univ Los Andes Chem Engn Dept Bogota Cundinamarca Colombia Univ Waterloo Chem Engn Dept Waterloo ON Canada

Chemical product design has progressively become a more critical issue since the chemical industry is rapidly moving toward the production of consumer-oriented products at low cost. This new paradigm has boosted research and developments in this emerging field. However, designing a new chemical product through an integrated approach is still challenging. In particular, the design of emulsified cosmetic products commonly involves the implementation of heuristics during the formulation of the product, highlighting the need of implementing integrated strategies in this field. This study reviews the current status of the integrated design of emulsified cosmetic products, including but not limited to, property modeling, manufacturing methods, the key variables affecting final product quality, and the current challenges in this field. This review highlights the need to perform close integration between market parameters, engineering variables, and business models, on the one hand, and systematic and standardized approaches to translate consumer needs into technical specifications on the other. Also, this study presents the requirement for better accuracy of predictive models for emulsified product's physical properties for the successful integrated design of cosmetic emulsions, considering different modeling frameworks such as population balance models that have the potential to improve the models' prediction capabilities. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.v. All rights reserved.

关键词： Product design Cosmetic emulsion Integrated design Process design Population balance models

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A 224-Gb/s Inverter-Based TIA with Interleaved Active-Feedback and Distributed Peaking in 28-nm CMOS for Silicon Photonic Receivers

A 224-Gb/s Inverter-Based TIA with Interleaved Active-Feedba...

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2022 IEEE International Conference on Integrated Circuits, Technologies and Applications, ICTA 2022

作者： Chen, Sikai Xue, Jintao Li, Leliang Li, Guike Zhang, Zhao Liu, Jian Liu, Liyuan Wang, Binhao Li, Yingtao Qi, Nan Lanzhou University Lanzhou China Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences State Key Laboratory of Transient Optics and Photonics Xi'an China University of Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering Beijing China Institute of Semiconductors Chinese Academy of Sciences State Key Laboratory of Superlattices and Microstructures Beijing China School of Future Technology University of Chinese Academy of Sciences Beijing China

ISBN: (数字)9781665492690

ISBN: (纸本)9781665492690

This paper presents the design and simulations of a 224-Gb/s inverter-based transimpedance amplifier (TIA) designed in 28-nm CMOS process. The co-design of the photodiode and CMOS TIA efficiently optimize the optical receiver. The TIA achieves the bandwidth enhancement with the distributed peaking and interleaved active-feedback (IAFB) technology. The simulations result show that the proposed TIA has 39-dBΩ transimpedance gain and 70-GHz bandwidth (BW). Overall, it achieves a clear 224-Gb/s PAM4 eye diagram. The total power consumption is 20.7mW at 0.9-v supply voltage. And the input referred noise current is 8.2uArms. © 2022 IEEE.

关键词： Operational amplifiers

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velocity (μPIv) and temperature/concentration (μLIF) measurements in a dual serpentine microchannel of a micro DMFC stack

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Thermal Science and engineering Progress 2024年 51卷

作者： Hsieh, Shou-Shing Feng Yeh, Ming Huang, Ching-Feng Department of Mechanical and Electromechanical Engineering National Sun Yat-Sen University Kaohsiung80424 Taiwan

Herein, we present an experimental study of the flow, as well as the thermal and concentration characteristics of two serpentine microchannels, via micro particle image velocity/micro laser induced fluorescence optical visualization techniques, which simulate the flow channels at the anode of a typical micro direct methanol fuel cell stack (two cells: Cell A/B). The flow channel consists of two serpentine microchannels. Each channel has one channel and six paths. Channels A and B were connected by a connecting tube to create an entire flow loop with methanol as the working fluid. The velocity, temperature and concentration distribution along the channel downstream for 5.7 ≤ Re ≤ 594 were visualized and measured. At a particular operation condition of methanol flow rate of 1 ml/min and concentration of 1 M at stack temperature of 25 °C, both in series and parallel arrangements were examined with a peak power density of 61.4 mW/cm2 (current density 120 mA/cm2 and voltage 1.0 v) and of 75 mW/cm2 (current density 120 mA/cm2 and voltage 1.2 v), respectively. CO2 ellipse-like bubbles were found at the up/down stream corners with a definite major/minor axis length. Furthermore, relevant (f, Nu, and Sh) correlations regarding the relationship of the methanol solution pumping power, heat transfer and utilization with Reynolds number in form of power law were developed with 95 % accuracy of experimental data. With these related results, it might be beneficial to the configuration design of the μDMFC stack. © 2024 Elsevier Ltd

关键词： Methanol

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Enhancing the Efficiency of (CH3NH3)2CuCl4-based Perovskite Solar Cells by Selecting a Suitable Electron Transport Layer

Enhancing the Efficiency of (CH3NH3)2CuCl4-based Perovskite ...

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International Conference on Electrical, Computer and Communication engineering (ECCE)

作者： Asadul Islam Shimul Swarna Rani Sarker Md Maruf Hossain Subir Kumar Ghosh Md Jannatul Naime Safia Aktar Dipa Department of Electrical and Electronic Engineering Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj Bangladesh Department of Electrical Engineering and Computer Science University of Missouri Columbia MO USA

ISBN: (数字)9798350357509

ISBN: (纸本)9798350357516

The compound (CH 3 NH 3 ) 2 CuCl 4 demonstrates exceptional electrical and optical characteristics, positioning it as a viable candidate for solar cell device, with the potential to enhance efficiency and reduce manufacturing expenses. This research examines the ideal device architecture utilizing a configuration of FTO/ETL/(CH 3 NH 3 ) 2 CuCl 4 /HTL/Au, assessed with the SCAPS-1D simulator. Six electron transport layers (ETLs) and one hole transport layer (HTL) were evaluated, with essential device parameters, including thickness, temperature, interface defect, doping density, and defect density, meticulously tuned to improve device performance. The optimized device configuration, FTO/WS 2 /(CH 3 NH 3 ) 2 CuCl 4 /CuSCN/Au, demonstrated exceptional performance compared to the tested ETL materials (IGZO, PCBM, SnO 2 , WS 2 , ZnO, and ZnSe), achieving a power conversion efficiency (PCE) of 33.35%, a short circuit current density (J SC ) of 37.77 mA/cm 2 , an open circuit voltage (v OC ) of 1.0 v, and a fill factor (FF) of 87.65%. This advanced perovskite solar cell design highlights (CH 3 NH 3 ) 2 CuCl 4 as a viable choice for next-generation solar energy applications, providing enhanced efficiency with less toxicity relative to traditional thin-film solar cells.

关键词： Performance evaluation Toxicology II-vI semiconductor materials Photovoltaic cells Space technology voltage Zinc oxide Perovskites Topology Electrons

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Ultrashort Throw Lenses with Catadioptric Relay Suitable for Flat and Curved Screens 11

Ultrashort Throw Lenses with Catadioptric Relay Suitable for...

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Conference on current developments in Lens design and optical engineering XXI

作者： Nishikawa, Jun Nishiyama, Mariko Sony Corp R&D Ctr Atsugi Kanagawa Japan

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In the past two decades, to realize high resolutions and low distortions while miniaturizing optical systems, various ultrashort throw lenses (USTs) have been proposed. In this work, ultrashort throw lenses with a catadioptric relay (USTCRs) with rotational symmetry are proposed to provide the solution. First, the initial design method of the USTCR and the optimized design solution are presented. Although this optical system with a throw ratio of 0.26:1 has resolutions and distortions equivalent to those of conventional UST with one aspherical mirror, the depth of focus (DOF) on the panel side becomes 1.31 times deeper with appropriate corrections of the field curvature. The total length of the lens is reduced to 0.89 times, the area of the main mirror is reduced to 0.22 times, and the number of lenses is reduced from 13 to 9 elements. Based on these results, several optical designs for USTCR have been tried and an optical design with robustness has been proposed. By optimizing the power of each lens group, the decenter sensitivity improved to 0.46 times for parallel decenter and 0.55 times for tilt decenter. By optimizing glass materials, the shift of focal plane can be suppressed to 0.56 times when the temperature increases by 30 degrees C. An USTCR suited for a curved screen has also been proposed. By introducing appropriate constraints that correct distortions, high resolutions and low distortions have been realized while maintaining a wide angle of view. USTCRs suited for various curved screens are currently underway.

关键词： ultrashort throw projector projection lens catadioptric relay lens lens design lens system design concave mirror curved screen mirror system design

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Status of the demonstration of the critical technologies of the ATHENA telescope

Status of the demonstration of the critical technologies of ...

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2022 International Conference on Space Optics, ICSO 2022

作者： Ferreira, Ivo Bavdaz, Marcos Ayre, Mark Wille, Eric Shortt, Brian Fransen, Sebastiaan Collon, Maximilien J. vacanti, Giuseppe Barrière, Nicolas M. Landgraf, Boris Riekerink, Mark Olde Haneveld, Jeroen Start, Ronald van Baren, Coen Della Monica Ferreira, Desiree Massahi, Sonny Svendsen, Sara Christensen, Finn Krumrey, Michael Skroblin, Dieter Burwitz, vadim Pareschi, Giovanni Tagliaferri, Gianpiero Salmaso, Bianca Basso, Stefano Moretti, Alberto Spiga, Daniele valsecchi, Giuseppe vernani, Dervis Lupton, Paul Mundon, William Phillips, Gavin Schneider, Jakob Korhonen, Tapio Sanchez, Alejandro Heinis, Dominique Colldelram, Carles Tordi, Massimiliano Willingale, Richard European Space Agency ESTEC Keplerlaan 1 PO Box 299 NoordwijkNL-2200 AG Netherlands Cosine Warmonderweg 14 Sassenheim2171 AH Netherlands Micronit B.V. Colosseum 15 EnschedeNL-7521 PV Netherlands SRON Niels Bohrweg 4 Leiden2333 CA Netherlands DTU Space Elektrovej 328 Kgs Lyngby2800 Denmark Abbestr. 2-12 BerlinD-10587 Germany MPI für extraterrestrische Physik Giessenbachstrasse GarchingD-85748 Germany INAF Osservatorio Astronomico di Brera Via E. Bianchi 46 LC MerateI- 23807 Italy Media Lario S.r.l. Località Pascolo LC Bosisio PariniI-23842 Italy Teledyne E2V 106 Waterhouse Lane Essex ChelmsfordCM1 2QU United Kingdom Fraunhofer Institute for Material and Beam Technology Winterbergstrasse 28 DresdenD-01277 Germany Opteon Oy Väisäläntie 20 PiikkiöFI-21500 Finland ALBA Synchrotron Carrer de la Llum 2-26 Cerdanyola del Vallès Barcelona08290 Spain EIE Space Technologies Srl Via Torino 151 Mestre-VeneziaA - 30172 Italy University of Leicester University Road LeicesterLE1 7RH United Kingdom

ISBN: (纸本)9781510668034

The ATHENA (Advanced Telescope for High ENergy Astrophysics) mission is the current 2nd 'Large' mission (L2) in the ESA Cosmic vision programme currently. It is currently at Phase B1 but the mission concept will now enter a reformulation phase that will follow a design-to-cost approach. This paper describes the main technologies behind its reference X-ray telescope based on the modular Silicon Pore Optics (SPO) technology. The large X-ray mirror is the mission enabler being specifically developed for ATHENA, in a joint effort by industry, research institutions and ESA. All aspects of the optics are being addressed, from the mirror plates and their coatings to the mirror modules and their assembly into the ATHENA telescope, as well as the facilities required to build and test the flight optics, demonstrating performance, robustness, and programmatic compliance. An overview of the status of the design and demonstration of the telescope is given. The risks that have successfully been mitigated are made explicit and the remaining risks are identified. © 2023 SPIE. All rights reserved.

关键词： Silicon

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Ambient Infrared Solar Energy Harvesting Using Log-Periodic optical Rectenna at 28.3 THz

Ambient Infrared Solar Energy Harvesting Using Log-Periodic ...

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Mediterrannean Microwave Symposium (MMS)

作者： Ali Yahyaoui Ahmad Elsharabasy Fahad Al-Qahtani Mohammed Aseeri Hatem Rmili Taoufik Aguili Communications Systems Laboratory (SysCom) University of Tunis El Manar (UTM) National Engineering School of Tunis (ENIT) Tunis Tunisia Electrical and Computer Engineering Department McMaster University Hamilton ON Canada Electrical and Computer Engineering Department Faculty of Engineering King Abdulaziz University Jeddah Saudi Arabia Next Generation Connectivity and Wireless Sensors Institute King Abdulaziz City of Science and Technology (KACST) Riyadh Saudi Arabia K. A. CARE Energy Research and Innovation Center King Abdulaziz University Jeddah Saudi Arabia

This work presents the conception and design of log-periodic nano-antenna for the infrared IR solar energy harvesting applications. The suggested nano-antenna contain three layers. The first layer contains two arms of the log-periodic nano-antenna made of gold (Au), the second is a quartz substrate and finally, the ground layer is a gold (Au) plane reflector. The analysis of the proposed nano-antenna is performed using FDTD technique in the range of frequencies [28 to 29 THz]. A huge parametric study was performed to optimize the different parameters (thickness of the arms, teeth angle, number of teeth, substrate thickness, solid angles, and inner radius) of the nano-antenna. With the optimized design parameters, the structure captures a maximum electric field E at the hotspot point of around 800 v/m. The optimized geometry and shape of the presented structure make it a suitable choice to design a metal-insulator-metal (MIM) rectifier system in order to harvest solar infrared IR energy with good performance in terms of E-field, current-voltage I/v, resistance, and responsivity.

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Testing of Fiber Optic Based Sensors for Advanced Reactors in the Texas A&M University Triga Reactor

SSRN

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SSRN 2023年

作者： Gates, Jonathan Tyler Tsvetkov, Pavel v. Texas A&M University Nuclear Engineering Department College StationTX United States

An optical Fiber Based Gamma Thermometer has been developed and tested at the Texas A&M University reactor as well as the Ohio State Research Reactor. This sensor technology provides temperature measurement of a thermal mass undergoing gamma heating, from which the gamma flux along the length of the sensor may be calculated. The gamma flux data from an array of OFBGTs could allow the determination of local power density within a nuclear reactor core in three dimensions. The design of the sensor makes use of optical fiber as a truly distributed temperature sensor with a spatial resolution less than 1mm and temperature accuracy of ±1°C. The testing program showed that the system provided the expected temperature data for each location. Overall, this sensor technology shows significant promise for current Light Water Reactors as well as advanced nuclear reactors by providing an unparalleled level of precision in reactor power measurement. © 2023, The Authors. All rights reserved.

关键词： optical fibers

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Low-capacitance Ultrathin InGaAs Membrane Photodetector on Si Slot Waveguide towards Receiver-less System

Low-capacitance Ultrathin InGaAs Membrane Photodetector on S...

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2022 IEEE Symposium on vLSI Technology and Circuits, vLSI Technology and Circuits 2022

作者： Akazawa, T. Wu, D. Sumita, K. Sekine, N. Okano, M. Toprasertpong, K. Takagi, S. Takenaka, M. University of Tokyo Department of Electrical Engineering and Information Systems Tokyo Japan Japan

ISBN: (纸本)9781665497725

We proposed a Si/III-v hybrid waveguide photodetector consisting of an ultrathin InGaAs membrane and Si slot waveguide, enabling low capacitance and high responsivity simultaneously. The strong optical confinement in a Si slot waveguide enhanced optical absorption in the InGaAs membrane. As a result, we successfully demonstrated high responsivity of 1 A/W and sufficiently small capacitance of 1.9 fF to realize a receiver-less (TIA-less) system. © 2022 IEEE.

关键词： Capacitance

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