Academic literature on the topic 'Multi-layered Assembly'

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Journal articles on the topic "Multi-layered Assembly"

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Snead, Wilton T., Krishna Shrinivas, Danial Babaki, Kevin M. Weeks, and Amy S. Gladfelter. "RNA structure controls assembly of multi-layered paraspeckles." Biophysical Journal 122, no. 3 (February 2023): 67a. http://dx.doi.org/10.1016/j.bpj.2022.11.571.

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Hiller, Jonathan, Joni Mici, and Hod Lipson. "Layered assemblers for scalable parallel integration." Journal of The Royal Society Interface 17, no. 171 (October 2020): 20200543. http://dx.doi.org/10.1098/rsif.2020.0543.

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Many complex natural and artificial systems are composed of large numbers of elementary building blocks, such as organisms made of many biological cells or processors made of many electronic transistors. This modular substrate is essential to the evolution of biological and technological complexity, but has been difficult to replicate for mechanical systems. This study seeks to answer if layered assembly can engender exponential gains in the speed and efficacy of block or cell-based manufacturing processes. A key challenge is how to deterministically assemble large numbers of small building blocks in a scalable manner. Here, we describe two new layered assembly principles that allow assembly faster than linear time, integrating n modules in O( n 2/3 ) and O( n 1/3 ) time: one process uses a novel opto-capillary effect to selectively deposit entire layers of building blocks at a time, and a second process jets building block rows in rapid succession. We demonstrate the fabrication of multi-component structures out of up to 20 000 millimetre scale spherical building blocks in 3 h. While these building blocks and structures are still simple, we suggest that scalable layered assembly approaches, combined with a growing repertoire of standardized passive and active building blocks could help bridge the meso-scale assembly gap, and open the door to the fabrication of increasingly complex, adaptive and recyclable systems.
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Liu, Fang Wen, Yun Xing Liang, and Hua Wu Liu. "The Research of Multi-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials." Advanced Materials Research 332-334 (September 2011): 1910–13. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1910.

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Multi-layered biaxial weft knitted fabrics has excellent mechanical properties and formability. The performances of multi-layered biaxial weft knitted fabrics were compared with multi-axial warp knitted fabrics and plain weave fabrics to highlight the advantages of this novel fibrous assembly. The manufacturing method and applications of the developed novel fabrics were illustrated in details.
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Oh, J. W., H. Na, S. Nahm, Y. Kim, and H. Choi. "Multi-Layered Membrane Electrode Assembly Fabrication by Electro-Spraying." ECS Transactions 58, no. 1 (August 31, 2013): 1075–83. http://dx.doi.org/10.1149/05801.1075ecst.

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IGNATOV, A. V., and R. M. SUBKHANKULOV. "ADHESIVE ASSEMBLY OF MULTI–LAYERED PRODUCTS WITH VARIABLE SECTION." Fundamental and Applied Problems of Engineering and Technology 339, no. 1 (2020): 48–53. http://dx.doi.org/10.33979/2073-7408-2020-339-1-48-53.

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Allen, Matthew E., James Albon, and Yuval Elani. "Layer-by-layer assembly of multi-layered droplet interface bilayers (multi-DIBs)." Chemical Communications 58, no. 1 (2022): 60–63. http://dx.doi.org/10.1039/d1cc05155e.

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Li, Mei, Erik Dujardin, and Stephen Mann. "Programmed assembly of multi-layered protein/nanoparticle-carbon nanotube conjugates." Chemical Communications, no. 39 (2005): 4952. http://dx.doi.org/10.1039/b509109h.

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Hwang, Tae-Yeon, Yomin Choi, YoSeb Song, Nu Si A. Eom, Seil Kim, Hong-Baek Cho, Nosang V. Myung, and Yong-Ho Choa. "A noble gas sensor platform: linear dense assemblies of single-walled carbon nanotubes (LACNTs) in a multi-layered ceramic/metal electrode system (MLES)." Journal of Materials Chemistry C 6, no. 5 (2018): 972–79. http://dx.doi.org/10.1039/c7tc03576d.

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Garg, Samridhi, Vinay K. Midha, and Monica Sikka. "Studies on thermal comfort of multi-layered fabric assembly after wetting with sweat and distilled water." Journal of Industrial Textiles 52 (August 2022): 152808372211101. http://dx.doi.org/10.1177/15280837221110105.

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Textiles play a vital role in assuring the thermal stability of the human body. The absorption of perspiration or moisture from a humid environment might result in wet clothing. Protective and sports apparel are often wet when the wearer is involved in high level of activity; thereby affecting the comfort. In order to understand the comfort behaviour of textiles in wet state, most of the researchers used the distilled water or NaCl aqueous solution. However, human sweat is a very complex aqueous mixture of chemicals comprising of salts, lipids, urea, lactic acid, carbohydrates, and minerals. In the present study, the effect of simulated sweat solution on the thermal behaviour of multi-layered fabric assembly is studied and compared with that of distilled water. The multi-layered fabric assembly consists of breathable PU-coated nylon as an outer layer; polyester knitted fabric as an inner layer; and micro-polyester wadding/hollow-polyester wadding/spacer fabric as the middle layer. In addition, the inner layer (next to the skin) is also tested for thermal comfort for both dry and wet states. It is observed that thermal properties of fabrics are drastically affected under wet conditions. The inner layer of fabric wetted with distilled water shows higher thermal conductivity as compared to that wetted with simulated sweat. Among various multi-layered assemblies, the thermal resistance and thermal diffusion of multi-layered assembly having hollow polyester wadding as a middle layer is high as compared to that having spacer fabric in the middle, under both dry and wet conditions.
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Zhao, Xiaolin, Lijie Zhong, Yunfang Li, Shuqiong Xu, Hongjin Fu, Zhaoxin Lu, and Danhui Zhang. "Defect enabled formation of multilayered funnel from isolated graphene nanoring." Physical Chemistry Chemical Physics 18, no. 45 (2016): 31323–29. http://dx.doi.org/10.1039/c6cp06739e.

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Dissertations / Theses on the topic "Multi-layered Assembly"

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Carvalho, João Pedro Fernandes. "Multi-layered nanosystems for the controlled release of anticancer drugs." Master's thesis, 2018. http://hdl.handle.net/10773/25644.

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Cancer is one of the leading causes of death worldwide, and current therapeutic options present numerous drawbacks. Chemotherapy, specifically, is associated with widely known side effects. However, and due to the scientific and technologic advances of the past years, a new approach to this dilemma appears in nanomedicine: the use of nanosystems capable of releasing the anticancer drugs in a controlled way and only at the designated cells. These nanosystems may be obtained from numerous materials, including biopolymers, and by various techniques. Specifically, the work described here consists in the synthesis and characterization of nanoparticles obtained by layer-by-layer assembly from amino-modified spherical SiO2 templates (diameter: 234 ± 19 nm). The alternate deposition of biopolymers - alginate (ALG) and chitosan (CH) or lysozyme nanofibrils (LNFs) - on templates pre-loaded with curcumin allowed the creation of nanoparticles covered in ALG/CH (with a diameter of 243 ± 8 nm) or ALG/LNFs (with 242 ± 8 nm). The systematic reversion the zeta-potential and the observation of the particles by scanning electron microscopy (SEM) confirms the deposition of each biopolymeric layer. The present work also includes the evaluation of the release profile of this drug from the multi-layered nanoparticles, demonstrating a more controlled release than with the bare counterparts. The evaluation of their cytotoxic capacity in human liver cancer cell line (HepG2) was posteriorly evaluated through an MTT assay. The cytotoxic effect of layered particles containing CUR was similar to the unlayered counterparts’, demonstrating that the two layers of biopolymers (ALG/CH or ALG/LNFs) do not compromise their cytotoxic potential.
O cancro é uma das principais causas de morte no mundo, e as opções terapêuticas atuais apresentam inúmeros inconvenientes. A quimioterapia, especificamente, possui efeitos secundários reconhecidos. No entanto, e graças ao desenvolvimento tecnológico e científico dos últimos anos, surge na nanomedicina uma nova abordagem para este dilema: a utilização de nanossistemas capazes de libertar fármacos anticancerígenos de forma controlada e apenas em células designadas. Estes nanossistemas podem ser obtidos a partir de inúmeros materiais, incluindo biopolímeros, e por variadas técnicas. Neste contexto, o trabalho desenvolvido nesta dissertação consiste na síntese e caracterização de nanopartículas obtidas por montagem camada-a-camada a partir de templates esféricos de SiO2 amino-modificados (diâmetro: 234 ± 19 nm). A deposição alternada de biopolímeros – alginato (ALG) e quitosano (CH) ou nanofibrilas de lisozima (LNFs) - em templates com curcumina previamente incorporada deu origem a nanopartículas cobertas por ALG/CH (com 243 ± 8 nm de diâmetro) ou por ALG/LNFs (com 242 ± 8 nm). A sistemática reversão do potencial-zeta e a observação das partículas por microscopia eletrónica de varrimento (SEM) confirma a deposição de cada camada de biopolímero. O presente trabalho inclui também a avaliação do perfil de libertação do fármaco a partir destas nanopartículas multicamada, demonstrando-se uma libertação mais controlada do que em partículas sem camadas de biopolímeros. A avaliação da capacidade citotóxica em células humanas de cancro do fígado (HepG2) foi posteriormente avaliada através de um ensaio com MTT. O efeito citotóxico das partículas contendo CUR e cobertas de polímeros revelou-se semelhante ao das partículas análogas sem camadas, demonstrando que as duas camadas de biopolímeros (ALG/CH ou ALG/LNFs) não comprometem o potencial citotóxico das mesmas.
Mestrado em Bioquímica
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Book chapters on the topic "Multi-layered Assembly"

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Brindley, Keith. "Multi-layered board manufacture." In Newnes Electronics Assembly Pocket Book, 165–67. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-7506-0222-8.50074-0.

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Brindley, Keith. "Multi-layered printed circuit boards." In Newnes Electronics Assembly Pocket Book, 162–64. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-7506-0222-8.50073-9.

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Sanmark, Alexandra. "Elite Rituals at Scandinavian Assemblies." In Viking Law and Order. Edinburgh University Press, 2017. http://dx.doi.org/10.3366/edinburgh/9781474402293.003.0004.

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This chapter builds on the evidence of thing sites as elite foci in the landscape. Previous chapters have shown that the elite strived for the ‘right’ site architecture and competed with rivals through the design of their thing sites. The assembly features were not only symbolic, but also played important roles in the various assembly site rituals. The majority of these rituals seem to have been elite-driven and modifications to the sites can therefore be seen as reflections of societal change, for example in terms of ruler ship and religion. In this chapter, the identified assembly site features will be investigated in terms of their meaning and function in elite rituals carried out at these sites. The differing roles and experiences of the thing participants and the attendees add to the multi-layered nature of the assembly gatherings The assembly rituals can be defined as ‘commemorative’, which entail performances, that is evocation and declarations of key components of ritual narratives, but also bodily movements, such as gestures, postures and motion. In addition, dramatic spectacle tends to be employed to strengthen memory creation.
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Conference papers on the topic "Multi-layered Assembly"

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Campbell, Sawyer D., Jogender Nagar, Pingjuan L. Werner, and Douglas H. Werner. "Multi-objective analysis of multi-layered core-shell nanoparticles." In 2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2017. http://dx.doi.org/10.23919/ursigass.2017.8105309.

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Brett, J., Andrew Ooi, J. Soria, and D. Honnery. "NUMERICAL STUDY OF A MULTI-LAYERED EVAPORATING FUEL DROPLET." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p12.500.

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Vellucci, S., D. De Sibi, A. Monti, M. Barbuto, A. Toscano, and F. Bilotti. "Multi-layered Metasurfaces Enabling Frequency Reconfigurability in Wire Antennas." In 2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2021. http://dx.doi.org/10.23919/ursigass51995.2021.9560378.

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Tao Yue, Masahiro Nakajima, Huaping Wang, Chengzhi Hu, Masaru Takeuchi, and Toshio Fukuda. "Fabrication and assembly of multi-layered microstructures embedding cells inside microfluidic devices." In 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2013). IEEE, 2013. http://dx.doi.org/10.1109/iros.2013.6696400.

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Jahed, Hamid, Behrooz Farshi, and Morvarid Karimi. "Optimum Design of Multi-Layered Vessels." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71543.

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Multi-layered pressure vessels are widely used in the field of high pressure technology. To enhance their load bearing capacity and life, different beneficial processes such as shrink-fit and autofrettage are usually employed. Shrink-fit process, increases load capacity but maximum interference is generally limited. Autofrettage, makes steep stress gradients moving away from bore but Bauschinger effect limits maximum feasible compression level. A combination of both, can conceivably give better stress distribution in layered vessels. The optimum design of a three-layer vessel for maximum life expectancy has been considered here, under the combined effects of autofrettage and shrink-fit. The numerical optimization procedure known as the Simplex search method is employed to get the optimum design. The layer thicknesses, shrink-fit pressures, and autofrettage percentages are treated as design variables. Under stress constraints, the operational sequences of the above processes, for assembly of the layered vessel have also been formulated so as to lead to best results. The fatigue life consideration is based on ASME code and standard for high pressure vessel technology defining the allowable final crack depth in multi-layered vessels. The proposed procedure is carried out on a number of examples. The results show that significant life enhancement can be achieved using the optimization procedure with proper combination of operations.
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Iliopoulou, V., R. De´nos, N. Billiard, and T. Arts. "Time-Averaged and Time-Resolved Heat Flux Measurements on a Turbine Stator Blade Using Two-Layered Thin-Film Gauges." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53437.

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This paper describes the steps undertaken to measure heat flux in a turbine tested in a blowdown windtunnel when using a two-layered thin film gauge array. The sensor consists of a nickel thermo resistor deposited onto a flexible polymide sheet that can be easily bounded on a substrate using double sided adhesive. The assembly constitutes a two-layered system. First, a numerical algorithm is proposed to extract the wall heat flux from the surface temperature history measured by the thin film gauge. It is very flexible and handles multi-layered systems. Then, an original procedure is proposed to determine the thermal properties and the thickness of the different layers. It uses the above numerical algorithm coupled with a minimization routine. The repeatability of the procedure is assessed. Finally, tests are processed according to the proposed method. The results are successfully compared with measurements performed with single-layered thin film gauges.
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Horváth, Imre, Zoltán Rusák, Han J. Broek, and Bert Douwes. "Processing the CAD Model of Sculptured Artifacts for Free-Form Thick-Layered Object Manufacturing." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/cie-14634.

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Abstract Processing CAD models of large sized, structurally complex, and dominantly sculptured objects for free-form thick-layered object manufacturing (FF-TLOM) is a non-trivial task. Algorithmic support is needed, especially when the applicators of the FF-TLOM technology are not specialized experts. The research team of the authors has developed and programmed a system of such algorithms to prepare NURBS-based assembly models for layered manufacturing, but also to control both the cutting tool and the manufacturing equipment. This paper starts with a brief overview of the FF-TLOM technology and the concept of reducing a CAD model to fabrication elements. Then, it explains the high-level concepts supporting the algorithms, and presents the details of their operation. The logically linked system of algorithms is applied to find the best position for segmentation. The best segmentation orientation can be found in a computation-intensive, multi-criterion optimization process. It is difficult to simplify and speed up, for the valuation of the parameters of the objective function cannot be done without a preliminary computation of the segments and layers.
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Huang, X., K. Ridgeway, S. Narasimhan, K. Reifsnider, and X. Ma. "Application of Plasma Sprayed Coatings in a Novel Integrated Composite Seal for SOFCs." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0361.

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Abstract Affordable and reliable solid oxide fuel cells (SOFCs) are being widely sought as the next-generation answer to the power needs of many applications throughout the world. Maintaining stable hermetic sealing is critical for SOFC stacks to achieve high efficiency and longevity. The authors have introduced a novel multi-layered composite seal, consisting of thin layers of oxidation resistant alloys, plasma sprayed ceramic, and hermetic filler materials. The seal structure will be directly fabricated onto the surfaces of mating adherends using low-cost manufacturing methods such as atmospheric plasma spray (APS). During stack assembly, sealing can be achieved through a simple heat/pressure-assisted curing process. As an important part of the layered composite seal, a plasma sprayed porous alumina-YSZ (yttria-stabilized zirconia) ceramic coating on Fe-Cr based interconnect material has been developed. The ceramic coating was made from low-cost commercially available powders and deposited by atmospheric plasma spray (APS) method. The coating composition and fabrication procedure were optimized for high mechanical robustness, low electric conductivity. Experimental results based on coated “button” samples have demonstrated good bond strength between the plasma-sprayed ceramic layers and interconnect substrates, excellent thermal shock resistnace, good electrical insulation properties, and low permeability. Initial testing result of a composite seal formed with a glass filler has shown a low gas leak rate and good thermo-cycling resistance.
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Lavoie, Andrew. "Lichten Award Paper: Variational Tolerance Analysis (VTA) - Design and Manufacturing Optimization Using Statistical Simulation." In Vertical Flight Society 77th Annual Forum & Technology Display. The Vertical Flight Society, 2021. http://dx.doi.org/10.4050/f-0077-2021-16817.

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Appropriate consideration of tolerances is critical to the design and manufacture of products that meet customer requirements and defined cost targets. Tolerance analysis is most commonly conducted at the individual part or sub-assembly level utilizing basic stack-up methods (worst-case analysis) to ensure the producibility of the assembled product. A worst-case analysis assumes that each dimension in the stack-up will be manufactured on the extreme end or limit of its assigned tolerance (max or min) in such a way that all tolerances become additive. This usually results in tighter than required drawing tolerances being assigned to guarantee the product can be assembled. Modern day manufacturing processes focus on targeting the nominal dimensional value, so it is safe to assume that a higher number of parts will be produced closer to the nominal value than parts produced at the extreme end of the tolerance range. When evaluating the tolerance stack-up of a larger assembly with many parts additional tolerance analysis methods apply (Root Sum Squared, RSS), and a worst-case analysis becomes more costly and less meaningful. The RSS method of tolerance analysis takes into consideration manufacturing targets and applies normal distribution methods to assess more likely tolerance results, allowing relaxed drawing tolerances to be assigned while still maintaining a high level of confidence in a successful assembly. For analysis of complex systems or installations, tolerance studies using more sophisticated approaches to deal with variation such as Monte Carlo statistical analysis is required. Variational Tolerance Analysis (VTA) tools available today allow a typical Monte Carlo tolerance simulation to be visualized by the designer through 3-dimensional real time manufacturing simulations and sensitivity analysis. This in turn simplifies the development process and allows better identification of tolerance drivers within a large system installation; analysis of the geometric effect of tolerances within the installation; and the ability to quickly iterate the analysis to optimize designs for producibility and lower cost. In this paper, the use of VTA is assessed and quantified to form a business case for further investment by Lockheed Martin. In the course of this work, VTA has been evaluated both before and after final designs were released to manufacturing. Before final designs are released VTA can be used for design optimization (i.e. build before you build simulations), part sequencing studies, or to gain insight into the assembly/installation process enabling advanced planning to take place up front. VTA can also address challenges discovered after final designs have been released to manufacturing and parts are on hand (i.e. during the build) such as: assembly issues, out of spec part disposition, and to inform manufacturing of any special tooling or part rework considerations aiding in corrective action or risk mitigation plans. Cost savings to the business due to the implementation of VTA has been demonstrated in 4 distinct ways: 1.Reduced design revisions – Design optimization up front reduces future revisions caused by producibility and tolerance related discoveries. 2.Manufacturing – Through tolerance optimization, nonimpactful tolerances can be relaxed while still ensuring a successful assembly. 3.Reduced build schedule – Increased assembly awareness and advanced planning allows a streamlined production process with risk mitigation strategies in place. 4.Reduced scrap, rework, repair (SRR) – Engineering labor to disposition out of spec parts is reduced by entering as-measured tolerances into the simulation model to assess the overall impact to installation success. The conclusion is VTA simulations provide measurable benefits to the business through robust design optimization, and multi-layered cost and risk reductions.
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Erturk, Hakan. "Characterization of Electronic Packages by Thermal Diffusion Tomography." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88380.

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One of the most important functions of an electronic package is thermal management, as package is responsible from removing the heat generated by the transistors to ensure reliability. The quality of the package is very important for proper thermal management and it is important to have minimal flaws that increase thermal resistance of the package. Therefore, detection of flaws in the multi-layered package is critical during the assembly process development to monitor the package quality. This is achieved by techniques such as computerized tomography (CT) using x-rays, or scanning acoustic microscopy (SAM), all of which require very expensive equipment and significant processing time. Thermal diffusion tomography (TDT) can be used for detecting the flaws as a lower cost alternative to these imaging techniques. The feasibility of TDT as a fault detection technique for electronic packages with IR thermometry is considered in the current study. Two reconstruction algorithms considered; an iterative perturbation approach and Levenberg-Marquard method were found to be capable of detecting the flaws in the thermal interface layer.
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