Relevant bibliographies by topics / FFF technology

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'FFF technology'

Author: Grafiati
Published: 28 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'FFF technology.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "FFF technology"

1

Karayannis, Panagiotis, Fotini Petrakli, Anastasia Gkika, and Elias P. Koumoulos. "3D-Printed Lab-on-a-Chip Diagnostic Systems-Developing a Safe-by-Design Manufacturing Approach." Micromachines 10, no. 12 (November 28, 2019): 825. http://dx.doi.org/10.3390/mi10120825.

Full text
Abstract:
The aim of this study is to provide a detailed strategy for Safe-by-Design (SbD) 3D-printed lab-on-a-chip (LOC) device manufacturing, using Fused Filament Fabrication (FFF) technology. First, the applicability of FFF in lab-on-a-chip device development is briefly discussed. Subsequently, a methodology to categorize, identify and implement SbD measures for FFF is suggested. Furthermore, the most crucial health risks involved in FFF processes are examined, placing the focus on the examination of ultrafine particle (UFP) and Volatile Organic Compound (VOC) emission hazards. Thus, a SbD scheme for lab-on-a-chip manufacturing is provided, while also taking into account process optimization for obtaining satisfactory printed LOC quality. This work can serve as a guideline for the effective application of FFF technology for lab-on-a-chip manufacturing through the safest applicable way, towards a continuous effort to support sustainable development of lab-on-a-chip devices through cost-effective means.
APA, Harvard, Vancouver, ISO, and other styles
2

Szmidt, Artur, and Anna Rębosz-Kurdek. "New approaches of improving FDM/FFF printing technology." Mechanik 90, no. 3 (March 6, 2017): 258–61. http://dx.doi.org/10.17814/mechanik.2017.3.46.

Full text
Abstract:
This article presents new approaches of increasing the efficiency of FDM/FFF printing technology through the introduction of modifications to the form of filament and to the feeding mechanism. Currently used solutions and innovativeness of proposed concepts are discussed in the paper. A new approach concerning the modification of the filament form was presented in descriptive and graphic way. Moreover, constructional solutions of individual components of the patented (patent PL 224144 B1) filament feeding mechanism including a description of its operation were proposed.
APA, Harvard, Vancouver, ISO, and other styles
3

Caminero, Miguel Ángel, Ana Romero, Jesús Miguel Chacón, Pedro José Núñez, Eustaquio García-Plaza, and Gloria Patricia Rodríguez. "Additive manufacturing of 316L stainless-steel structures using fused filament fabrication technology: mechanical and geometric properties." Rapid Prototyping Journal 27, no. 3 (January 27, 2021): 583–91. http://dx.doi.org/10.1108/rpj-06-2020-0120.

Full text
Abstract:
Purpose Fused filament fabrication (FFF) technique using metal filled filaments in combination with debinding and sintering steps can be a cost-effective alternative for laser-based powder bed fusion processes. The mechanical behaviour of FFF-metal materials is highly dependent on the processing parameters, filament quality and adjusted post-processing steps. In addition, the microstructural material properties and geometric characteristics are inherent to the manufacturing process. The purpose of this study is to characterize the mechanical and geometric performance of three-dimensional (3-D) printed FFF 316 L metal components manufactured by a low-cost desktop 3-D printer. The debinding and sintering processes are carried out using the BASF catalytic debinding process in combination with the BASF 316LX Ultrafuse filament. Special attention is paid on the effects of build orientation and printing strategy of the FFF-based technology on the tensile and geometric performance of the 3-D printed 316 L metal specimens. Design/methodology/approach This study uses a toolset of experimental analysis techniques [metallography and scanning electron microcope (SEM)] to characterize the effect of microstructure and defects on the material properties under tensile testing. Shrinkage and the resulting porosity of the 3-D printed 316 L stainless steel sintered samples are also analysed. The deformation behaviour is investigated for three different build orientations. The tensile test curves are further correlated with the damage surface using SEM images and metallographic sections to present grain deformation during the loading progress. Mechanical properties are directly compared to other works in the field and similar additive manufacturing (AM) and Metal Injection Moulding (MIM) manufacturing alternatives from the literature. Findings It has been shown that the effect of build orientation was of particular significance on the mechanical and geometric performance of FFF-metal 3-D printed samples. In particular, Flat and On-edge samples showed an average increase in tensile performance of 21.7% for the tensile strength, 65.1% for the tensile stiffness and 118.3% for maximum elongation at fracture compared to the Upright samples. Furthermore, it has been able to manufacture near-dense 316 L austenitic stainless steel components using FFF. These properties are comparable to those obtained by other metal conventional processes such as MIM process. Originality/value 316L austenitic stainless steel components using FFF technology with a porosity lower than 2% were successfully manufactured. The presented study provides more information regarding the dependence of the mechanical, microstructural and geometric properties of FFF 316 L components on the build orientation and printing strategy.
APA, Harvard, Vancouver, ISO, and other styles
4

Czyżewski, Piotr, Marek Bieliński, Dariusz Sykutera, Marcin Jurek, Marcin Gronowski, Łukasz Ryl, and Hubert Hoppe. "Secondary use of ABS co-polymer recyclates for the manufacture of structural elements using the FFF technology." Rapid Prototyping Journal 24, no. 9 (November 12, 2018): 1447–54. http://dx.doi.org/10.1108/rpj-03-2017-0042.

Full text
Abstract:
Purpose The aim of this paper is presenting a new application of material obtained from the acrylonitrile butadiene styrene (ABS) recycling process from electronic equipment housings. Elements of computer monitors were used to prepare re-granulate, which in turn was used to manufacture a filament for fused filament fabrication (FFF) additive manufacturing technology. Design/methodology/approach The geometry of test samples (i.e. dumbbell and bar) was obtained in accordance with the PN-EN standards. Samples made with the FFF technology were used to determine selected mechanical properties and to compare the results obtained with the properties of ABS re-granulate mould pieces made with the injection moulding technology. The GATE device manufactured by 3Novatica was used to make the prototypes with the FFF technology. Processing parameters were tested with the use of an Aflow extrusion plastometer manufactured by Zwick/Roell and other original testing facilities. Tests of mechanical properties were performed with a Z030 universal testing machine, a HIT 50P pendulum impact tester and a Z3106 hardness tester manufactured by Zwick/Roell. Findings The paper presents results of tests performed on a filament obtained from the ABS re-granulate and indicates characteristic processing properties of that material. The properties of the new secondary material were compared with the available original ABS materials that are commonly used in the additive technology of manufacturing geometrical objects. The study also presents selected results of tests of functional properties of ABS products made in the FFF technology. Originality/value The test results allowed authors to assess the possibility of a secondary application of used elements of electronic equipment housings in the FFF technology and to compare the strength properties of products obtained with similar products made with the standard injection moulding technology.
APA, Harvard, Vancouver, ISO, and other styles
5

Khan, Shaheryar Atta, Bilal Ahmed Siddiqui, Muhammad Fahad, and Maqsood Ahmed Khan. "Evaluation of the Effect of Infill Pattern on Mechanical Stregnth of Additively Manufactured Specimen." Materials Science Forum 887 (March 2017): 128–32. http://dx.doi.org/10.4028/www.scientific.net/msf.887.128.

Full text
Abstract:
Additive manufacturing has stepped down from the world of Sci-Fi into reality. Since its conception in the 1980s the technology has come a long way. May variants of the technology are now available to the consumer. With the advent of custom built (open source) Fused Deposition Modeling based printing technology Fused Filament Fabrication (FFF), FDM/FFF has become the most used Additive Manufacturing technology. The effects of the different infill patterns of FDM/FFF on the mechanical properties of a specimen made from ABS are studied in this paper. It is shown that due to changes in internal structures, the tensile strength of the specimen changes. The study also investigate the effect of infill pattern on the build time of the specimen. Extensive testing yielded the optimal infill pattern for FDM/FFF. An open source Arduino based RepRap printer was used for the preparation of specimen and showed promising results for rapid prototyping of custom built parts to bear high loads. The study can help with the increase in the use of additive manufacturing for the manufacturing of mechanically functioning parts such as prosthetics
APA, Harvard, Vancouver, ISO, and other styles
6

Ahroni, Y., N. Dresler, A. Ulanov, D. Ashkenazi, M. Aviv, M. Librus, and A. Stern. "Selected Applications of Stimuli-Responsive Polymers: 4D Printing by the Fused Filament Fabrication Technology." Annals of Dunarea de Jos University of Galati Fascicle XII Welding Equipment and Technology 31 (December 28, 2020): 13–22. http://dx.doi.org/10.35219/awet.2020.02.

Full text
Abstract:
In the past few years four-dimensional (4D) printing technologies have attained worldwide interest and they are now considered the "next big thing". The aim of this research is to provide three selected examples of stimuli-responsive polymer (SRP) applications additively manufactured (AM) by the fused filament fabrication (FFF) technique. To that end, a CCT BLUE filament of thermo-responsive polymer was chosen to produce a water temperature indicator, which changes colour from blue to white when temperature increases; a CCU RED filament of photo-responsive polymer was used to produce a sunlight / UV indicator bracelet; a transparent PLA CLEAR polymer, a CCU RED photo-responsive polymer, and an electrical conductive PLA polymer were selected to produce a smart business card stand. The temperature indicator capability was analysed based on examining colour changes as a function of temperature changes. The sunlight/UV indicator capability was analysed based on the inspection of colour change as a function of absorbed sun/ultraviolet light. The electrical conductivity of the conductive PLA polymer was examined by performing resistance measurements. All three objects were successfully produced and their functionality was demonstrated. We hope that these examples will catalyse the expansion of FFF 4D printed SRP applications, as much work remains to be done in designing the parts and developing FFF printing parameters that take advantage of the stimuli-responsive materials currently being developed for FFF technology.
APA, Harvard, Vancouver, ISO, and other styles
7

Honigmann, Philipp, Neha Sharma, Brando Okolo, Uwe Popp, Bilal Msallem, and Florian M. Thieringer. "Patient-Specific Surgical Implants Made of 3D Printed PEEK: Material, Technology, and Scope of Surgical Application." BioMed Research International 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/4520636.

Full text
Abstract:
Additive manufacturing (AM) is rapidly gaining acceptance in the healthcare sector. Three-dimensional (3D) virtual surgical planning, fabrication of anatomical models, and patient-specific implants (PSI) are well-established processes in the surgical fields. Polyetheretherketone (PEEK) has been used, mainly in the reconstructive surgeries as a reliable alternative to other alloplastic materials for the fabrication of PSI. Recently, it has become possible to fabricate PEEK PSI with Fused Filament Fabrication (FFF) technology. 3D printing of PEEK using FFF allows construction of almost any complex design geometry, which cannot be manufactured using other technologies. In this study, we fabricated various PEEK PSI by FFF 3D printer in an effort to check the feasibility of manufacturing PEEK with 3D printing. Based on these preliminary results, PEEK can be successfully used as an appropriate biomaterial to reconstruct the surgical defects in a “biomimetic” design.
APA, Harvard, Vancouver, ISO, and other styles
8

García Plaza, Eustaquio, Pedro Núñez López, Miguel Caminero Torija, and Jesús Chacón Muñoz. "Analysis of PLA Geometric Properties Processed by FFF Additive Manufacturing: Effects of Process Parameters and Plate-Extruder Precision Motion." Polymers 11, no. 10 (September 27, 2019): 1581. http://dx.doi.org/10.3390/polym11101581.

Full text
Abstract:
The evolution of fused filament fabrication (FFF) technology, initially restricted to the manufacturing of prototypes, has led to its application in the manufacture of finished functional products with excellent mechanical properties. However, FFF technology entails drawbacks in aspects, such as dimensional and geometric precision, and surface finish. These aspects are crucial for the assembly and service life of functional parts, with geometric qualities lagging far behind the optimum levels obtained by conventional manufacturing processes. A further shortcoming is the proliferation of low cost FFF 3D printers with low quality mechanical components, and malfunctions that have a critical impact on the quality of finished products. FFF product quality is directly influenced by printer settings, material properties in terms of cured layers, and the functional mechanical efficiency of the 3D printer. This paper analyzes the effect of the build orientation (Bo), layer thickness (Lt), feed rate (Fr) parameters, and plate-extruder movements on the dimensional accuracy, flatness error, and surface texture of polylactic acid (PLA) using a low cost open-source FFF 3D printer. The mathematical modelling of geometric properties was performed using artificial neural networks (ANN). The results showed that thinner layer thickness generated lower dimensional deviations, and feed rate had a minor influence on dimensional accuracy. The flatness error and surface texture showed a quasi-linear behavior correlated to layer thickness and feed rate, with alterations produced by 3D printer malfunctions. The mathematical models provide a comprehensive analysis of the geometric behavior of PLA processing by FFF, in order to identify optimum print settings for the processing of functional components.
APA, Harvard, Vancouver, ISO, and other styles
9

Jiang, Shijie, Yannick Siyajeu, Yinfang Shi, Shengbo Zhu, and He Li. "Improving the forming quality of fused filament fabrication parts by applied vibration." Rapid Prototyping Journal 26, no. 1 (January 6, 2020): 202–12. http://dx.doi.org/10.1108/rpj-12-2018-0314.

Full text
Abstract:
Purpose The purpose of this study is to investigate the efficiency of applied vibration in improving the forming quality (mechanical property and dynamics characteristics) of fused filament fabrication (FFF) parts. Design/methodology/approach A vibrating FFF three-dimensional printer was set up, with which the samples fabricated in different directions were manufactured separately without and with vibration applied. A series of experimental tests, including tensile tests, dynamics tests and scanning electron microscopy (SEM) tests, were performed on these samples to experimentally quantify the effect of applied vibration on their forming quality. Findings It has been found that the applied vibration can significantly increase the tensile strength and plasticity of the samples built in Z-direction, and obviously decrease the orthogonal anisotropy. It can also significantly change the sample’s natural frequency, decrease the resonant response and increase the modal damping ratio, thus improve the anti-vibration capability of FFF samples. In addition, the SEM analysis confirmed that applying vibration into FFF process could improve the forming quality of the fabricated part. Research limitations/implications Future research may be focused on investigating the efficiency of applied vibration in improving the forming quality of parts fabricated by the other additive manufacturing techniques. Practical implications This study helps to improve the reliability of FFF parts and extend the application range of FFF technology. Originality/value A novel method to improve the forming quality of FFF parts is provided and the available information about the performance of dynamics characteristics.
APA, Harvard, Vancouver, ISO, and other styles
10

Yonezawa, Asahi, and Akira Yamada. "Deterioration of the Mechanical Properties of FFF 3D-Printed PLA Structures." Inventions 6, no. 1 (December 22, 2020): 1. http://dx.doi.org/10.3390/inventions6010001.

Full text
Abstract:
Poly(lactic acid) (PLA) is a biodegradable polymer material used for the fabrication of objects by fused filament fabrication (FFF) 3D printing. FFF 3D printing technology has been quickly spreading over the past few years. An FFF-3D-printed object is formed from melted polymer extruded from a nozzle layer-by-layer. The mechanical properties of the object, and the changes in those properties as the object degrades, differ from the properties and changes observed in bulk objects. In this study we evaluated FFF-3D-printed objects by uniaxial tensile tests and four-point flexural tests to characterize the changes of three mechanical properties, namely, the maximum stress, elastic modulus, and breaking energy. Eight types of test pieces printed directly by an FFF 3D printer using two scan patterns and two interior fill percentages (IFPs) were tested by the aforesaid methods. The test pieces were immersed in saline and kept in an incubator at 37 °C for 30, 60, or 90 days before the mechanical testing. The changes in the mechanical properties differed largely between the test piece types. In some of the test pieces, transient increases in strength were observed before the immersion degraded the strength. Several of the test piece types were found to have superior specific strength in the tests. The results obtained in this research will be helpful for the design of PLA structures fabricated by FFF 3D printing.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "FFF technology"

1

Håkansson, Joel, and Otto Gårdebäck. "Elastiskt Ekvivalenta Modeller av Aortaaneurysm : Via 3D-printing med FFF-teknik." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-257782.

Full text
Abstract:
En aortaaneurysm är en komplicerad sjukdom med väldigt begränsade behandlingsmetoder. En bättre förståelse kring sjukdomen är därmed väsentligt för utvecklingen av ny medicin. Den här rapporten behandlar möjligheten att skriva ut modeller av aortaaneurysmer med samma materiella beteede som en riktig. Sådana modeller skulle vara en stor fördel i utveckling av ny medicin, eftersom de skulle tillåta forskare och läkare att både billigt och enkelt skapa pålitliga modeller i forskningssyfte. Skrivaren som undersökts är en Fused Filament Fabrication 3D-skrivare med polymeren TPU 95A som val av material. Detta genomfördes via två olika processer. Den första var materialtester med dragprovkurvor för vald polymer, samt undersökning av begränsningar med FFF-skrivare. Den andra var en finit elementanalys av en aortaaneurysm, från en röntgen med CT-angiografi. Resultaten från de två tillvägagångssätten har sedan jämförts och analyserats. Dragproverna gav TPU 95A en töjning på 2-4 %. Detta bedömdes för styvt i jämförelse med FEM-analysen, som uppmätte en cirka fem gånger större töjning. Om ett elastiskt material som uppfyller nödvändig töjning skulle användas har FFF-metoden fortfarande problem. Dessa problem innefattar instabilitet under utskrift samt ett större behov av supportmaterial, vilket riskerar att blockera flödet genom modellen. 3D-utskrift med FFF-metoden ansågs därmed ej lämpad för elastiskt ekvivalenta aneurysmmodeller, om inte tester med små deformationer utförs.
An abdominal aorta aneurysm is a very complicated condition with limited medical treatments. A better understanding of the disease is therefore vital for development of new treatment methods. This report covers the ability to print models of an aortic aneurysm with the same material properties as the real ones. Such models would be of great benefit as it would allow scientists and doctors to both easily and cheaply produce viable models for their research. The printer tested was a Fused Filament Fabrication printer with TPU 95A polymer as choice of material. This was done with a two-step process. The first step being material testing, producing stress-strain curves of the polymer and evaluating the limitations of FFF printing. The second being a finite element analysis of an aortic aneurysm from a CT angiography scan. The results from the two approaches then were compared. The material testing gave TPU 95A an elongation of 2-4 % which was deemed to stiff when compared to the FEM-analysis, that had an elongation approximately five times larger. If an elastic material to satisfy the required elongation were used, the FFF printing method still would have to deal with print stability problems and an increased need of support structures that could block the polymer blood vessel. As such FFF printing was seemed inadequate for printing elastic equivalent aortic aneurysm models unless for specific tests with small deformations.
APA, Harvard, Vancouver, ISO, and other styles
2

Jiroušek, Jan. "Analýza mechanických vlastností plastových vzorků zhotovených technologií 3D tisku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444289.

Full text
Abstract:
The master's thesis deals with the determination of mechanical properties of materials used for 3D printing (PLA, PETG, ABS, ASA). The theoretical part contains characteristics of polymer materials and describes testing of mechanical properties and additive technologies. In the experimental part, the standardized samples produced by the technology Fused Filament Fabrication were analysed using mechanical tests (tensile test and hardness test). Some of the examples were exposed to the selected factors of degradation. Selected parameters from mechanical testing (tensile strength, modulus of elasticity in tension, elongation and Shore hardness) were statistically processed. The conclusion of the thesis evaluates the impact of the factors of degradation on particular materials and compares them subsequently.
APA, Harvard, Vancouver, ISO, and other styles
3

Ansari, Mubashir Qamar. "Generation of Thermotropic Liquid Crystalline Polymer (TLCP)-Thermoplastic Composite Filaments and Their Processing in Fused Filament Fabrication (FFF)." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/99885.

Full text
Abstract:
One of the major limitations in Fused Filament Fabrication (FFF), a form of additive manufacturing, is the lack of composites with superior mechanical properties. Traditionally, carbon and glass fibers are widely used to improve the physical properties of polymeric matrices. However, the blending methods lead to fiber breakage, preventing generation of long fiber reinforced filaments essential for printing load-bearing components. Our approach to improve tensile properties of the printed parts was to use in-situ composites to avoid fiber breakage during filament generation. In the filaments generated, we used thermotropic liquid crystalline polymers (TLCPs) to reinforce acrylonitrile butadiene styrene (ABS) and a high performance thermoplastic, polyphenylene sulfide (PPS). The TLCPs are composed of rod-like monomers which are highly aligned under extensional kinematics imparting excellent one-dimensional tensile properties. The tensile strength and modulus of the 40 wt.% TLCP/ABS filaments was improved by 7 and 20 times, respectively. On the other hand, the 67 wt.% TLCP/PPS filament tensile strength and modulus were improved by 2 and 12 times, respectively. The filaments were generated using dual extrusion technology to produce nearly continuously reinforced filaments and to avoid matrix degradation. Rheological tests were taken advantage of to determine the processing conditions. Dual extrusion technology allowed plasticating the matrix and the reinforcing polymer separately in different extruders. Then continuous streams of TLCP were injected below the TLCP melting temperature into the matrix polymer to avoid matrix degradation. The blend was then passed through a series of static mixers, subdividing the layers into finer streams, eventually leading to nearly continuous fibrils which were an order of magnitude lower in diameter than those of the carbon and glass fibers. The composite filaments were printed below the melting temperature of the TLCPs, and the conditions were determined to avoid the relaxation of the order in the TLCPs. On printing, a matrix-like printing performance was obtained, such that the printer was able to take sharp turns in comparison with the traditionally used fibers. Moreover, the filaments led to a significant improvement in the tensile properties on using in FFF and other conventional technologies such as injection and compression molding.
Doctor of Philosophy
APA, Harvard, Vancouver, ISO, and other styles
4

ANDERSSON, AXEL. "Automation of Fused Filament Fabrication : Realizing Small Batch Rapid Production." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299447.

Full text
Abstract:
In this bachelor thesis, I examine how automation of fused filament fabrication (FFF) can be implemented, and what the limitations are for different kinds of automation solutions for FFF. Fused filament fabrication is a 3D-printing technology where a material is extruded through a nozzle, layer by layer, to create a print. The thesis also provides a calculation for the commercial feasibility of small batch rapid production with the implementation of an automation solution for FFF. The approach was a qualitative study containing five interviews, combined with empirical knowledge and data from the additive manufacturing company Svensson 3D. This was complemented with an analysis of which criteria to use when evaluating FFF automation solutions, and a framework for looking at FFF from an operator perspective. To calculate commercial feasibility of automation solutions for FFF, Internal Rate of Return and Payback Time were used. This resulted in six criteria to evaluate solutions for automation of FFF, three evaluations of problems within three solutions for automation of FFF, and a finding showing that small batch rapid production is commercially feasible with automated FFF. Lastly, the thesis contains a discussion regarding what the future is for FFF, and the limitations of the framework presented for evaluating automated FFF systems. Possible promising solutions for automated FFF are presented, together with ideas for how design for additive manufacturing can help shape the future of automated FFF.
I det här kandidatarbetet undersöker jag hur automatisering inom fused filament fabrication (FFF) kan implementeras, och vad begränsningarna är för olika sorters automatiseringslösningar för FFF. Det läggs även fram en uträkning för den kommersiella gångbarheten för small batch rapid production med implementeringen av ett automatiskt FFF-system. Tillvägagångsättet bestod av en kvalitativ studie baserad på fem intervjuer, kombinerad med empirisk kunskap och data från additiva tillverkningsföretaget Svensson 3D. Det här kompletterades med en analys av vilka parametrar som bör användas för att utvärdera lösningar för FFF-automatisering, och ett ramverk där automatiseringslösningarna betraktas ur ett operatörs-perspektiv. För att räkna ut den kommersiella gångbarheten för automatiseringslösningar av FFF användes internränta och återbetalningstid. Det här resulterade i sex parametrar för att utvärdera automatiseringslösningar för FFF, tre utvärderingar av vilka problem som finns i tre existerande automatiseringslösningar, och slutsatsen att small batch rapid production är kommersiellt gångbart för automatiserad FFF. Slutligen innehåller arbetet en diskussion gällande framtiden för FFF och begränsningarna hos det ramverk som presenterades för att utvärdera automatiserade FFF system. Möjliga lovande lösningar för automatiserad FFF presenteras och hur design för additiv tillverkning kan hjälpa till att forma framtiden för automatiserad FFF.
APA, Harvard, Vancouver, ISO, and other styles
5

Järleblad, Henrik. "Att lösapartiella differentialekvationermed FFT i fri rymd." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210860.

Full text
Abstract:
Detta kandidatexamensarbete har till syfte att belysa och utforska hur partiella differentialekvationer kan lösas på ett enkelt, effektivt och noggrant sätt i fri rymd, dvs då området är obegränsat (Rn). Lösningsmetoder som fungerar bra på begränsade domäner är generellt inte speciellt effektiva för dessa typer av problem, då artificiella randvillkor måste sättas, och beräkningsdomänen måste göras stor för att få en god noggrannhet i lösningen. Arbetet baseras på en artikel av Vico et al. som publicerades i juli 2016 och som introducerar en metod baserad på trunkerade Greens-funktioner och snabba Fouriertransformen (FFT). Den har spektral konvergens, och är relativt enkel att implementera. Jämfört med periodiska problem, för vilka FFT-baserade metoder är optimala, så måste man för samma spatiella upplösning öka gridstorleken för transformen med en översamplingsfaktor i varje rumsdimension. Metoden har komplexitet O(N log N) där N är antalet gridpunkter. För att påvisa denna metods användningspotential så visar detta projekt hur metoden kan användas för att lösa både Poissons och Helmholtz ekvationer i två respektive tre dimensioner, och demonstrerar också metodens spektrala noggrannhet och förväntade beräkningskomplexitet.
APA, Harvard, Vancouver, ISO, and other styles
6

Ivebrink, Pontus, and Peter Ytterström. "Frekvensuppdelning med FPGA." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56238.

Full text
Abstract:

Examensarbetets syfte var att skapa ett frekvensspektrum för ljud. För att representera detta frekvensspektrum används staplar av lysdioder. Systemet implementeras på ett Altera DE2 utvecklingskort. Olika sätt för att skapa dessa frekvensuppdelningar har testats och olika metoder för att lösa dessa har också testats.

Den slutliga implementeringen består av en filterbank som utnyttjar nersampling för att återanvända filter och sänka ordningen på dessa. Det största problemet var att få plats med allt på den FPGA som användes. Genom att byta till en lite mer komplicerad men effektivare filterstruktur så löstes detta problem och vi fick även gott om utrymme över.

Manualer och datablad har inte alltid varit lätta att tolka och ibland har andra metoder använts än de som beskrivs i dessa manualer med tips från support forum och handledare. Det finns vissa förbättringar att göra och vissa saker skulle kunnat göras annorlunda för att spara resurser med ett lite sämre resultat. När projektet var klart hade alla krav som ställts uppfyllts.

APA, Harvard, Vancouver, ISO, and other styles
7

Bien, Franklin Young-Jae. "Reconfigurable equalization for 10-Gb/sec serial data links in a 0.18-μm CMOS technology." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14026.

Full text
Abstract:
The objective of the proposed research is to realize a 10-Gb/sec serial data link over band-limited channels, such as backplanes, multi-mode fiber, and copper-based cables that were originally designed for data rates less than 1Gb/sec. This is achieved using electrical equalization implemented in an integrated circuit (IC). To successfully compensate for various band-limited channels at the targeted data rate with a single equalizer IC, a reconfigurable equalizer topology is proposed. In order to realize the proposed goal, various channels are characterized of their forward transmission frequency response. Based on the measured channel data, system simulations are performed to identify the required specifications for IC implementation. This provides information such as optimal number of taps, fractionally-spaced tap delay, and tap coefficients for the proposed IC. With the obtained system requirements, IC building blocks are designed and fabricated in a 0.18- and #956;m CMOS technology. The fully-integrated reconfigurable CMOS equalizer provides a single-chip solution for compensating various band-limited channels. This enables 10-Gb/sec serial data transmission achieving signal integrity beyond their designed specifications.
APA, Harvard, Vancouver, ISO, and other styles
8

Dahlbäck, Niklas. "Implementation of a fast method for reconstruction of ISAR images." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2073.

Full text
Abstract:

By analyzing ISAR images, the characteristics of military platforms with respect to radar visibility can be evaluated. The method, which is based on the Discrete-Time Fourier Transform (DTFT), that is currently used to calculate the ISAR images requires large computations efforts. This thesis investigates the possibility to replace the DTFT with the Fast Fourier Transform (FFT). Such a replacement is not trivial since the DTFT is able to compute a contribution anywhere along the spatial axis while the FFT delivers output data at fixed sampling, which requires subsequent interpolation. The interpolation leads to a difference in the ISAR image compared to the ISAR image obtained by DTFT. On the other hand, the FFT is much faster. In this quality-and-time trade-off, the objective is to minimize the error while keeping high computational efficiency.

The FFT-approach is evaluated by studying execution time and image error when generating ISAR images for an aircraft model in a controlled environment. The FFT method shows good results. The execution speed is increased significantly without any visible differences in the ISAR images. The speed-up- factor depends on different parameters: image size, degree of zero-padding when calculating the FFT and the number of frequencies in the input data.

APA, Harvard, Vancouver, ISO, and other styles
9

Teixeira, Duarte Filipe Pereira. "Microsoft-Nokia : stategy and valuation." Master's thesis, Instituto Superior de Economia e Gestão, 2015. http://hdl.handle.net/10400.5/10888.

Full text
Abstract:
Mestrado em Finanças
A constante necessidade de inovação no setor tecnológico é uma grande condicionante para o sucesso de uma empresa desse sector. A Microsoft, uma das maiores empresas do setor, tem ficado para trás dos seus principais concorrentes (Apple e Samsung), não beneficiando das novas tendências de mercado: móvel e cloud. Esta necessidade de inovar, aliada à turbulência financeira que estamos a viver, levaram a Microsoft a reagir e aproveitar a oportunidade de adquirir o segmento de telemóveis da Nokia. Para o fazer, a Microsoft predispôs-se a pagar $9,500 milhões pelo segmento de "Devices and Services". Fusões e aquisições são consideradas uma das melhores formas para as empresas aumentarem o valor para os seus acionistas, apesar das dificuldades inerentes ao processo. O objetivo deste projeto é compreender as motivações por trás do negócio, do ponto de vista da Microsoft, estimar as possíveis sinergias e avaliar a empresa que resultou desta aquisição.
The constant need for innovation in the technology sector is a major drive for a company?s success. Microsoft, one of the largest companies in the sector was lagging behind its competitors (such as Apple and Samsung), not being able to benefit from new market trends: mobile and cloud. The need to innovate, alongside the financial turmoil we are living in, led Microsoft to react and seize the opportunity to acquire Nokia?s phone segment. To do that, Microsoft paid Nokia $9,500 million for its "Devices and Services" segment. Mergers and Acquisitions are considered one of the best forms for companies to achieve value growth for their shareholders despite the inherent difficulties. The goal of this project is to understand the motivations behind the deal (from Microsoft's perspective), evaluate the possible synergies, and perform a valuation of the company that resulted from this acquisition.
APA, Harvard, Vancouver, ISO, and other styles
10

Paditz, Ludwig. "Using ClassPad-technology in the education of students of electricalengineering (Fourier- and Laplace-Transformation)." Proceedings of the tenth International Conference Models in Developing Mathematics Education. - Dresden : Hochschule für Technik und Wirtschaft, 2009. - S. 469 - 474, 2012. https://slub.qucosa.de/id/qucosa%3A1799.

Full text
Abstract:
By the help of several examples the interactive work with the ClassPad330 is considered. The student can solve difficult exercises of practical applications step by step using the symbolic calculation and the graphic possibilities of the calculator. Sometimes several fields of mathematics are combined to solve a problem. Let us consider the ClassPad330 (with the actual operating system OS 03.03) and discuss on some new exercises in analysis, e.g. solving a linear differential equation by the help of the Laplace transformation and using the inverse Laplace transformation or considering the Fourier transformation in discrete time (the Fast Fourier Transformation FFT and the inverse FFT). We use the FFT- and IFFT-function to study periodic signals, if we only have a sequence generated by sampling the time signal. We know several ways to get a solution. The techniques for studying practical applications fall into the following three categories: analytic, graphic and numeric. We can use the Classpad software in the handheld or in the PC (ClassPad emulator version of the handheld).
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "FFF technology"

1

Robinson, Philip J. Space station auxiliary thrust chamber technology: Final report 2210-90-FFR. [Cleveland, Ohio]: Lewis Research Center, National Aeronautics and Space Administration, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Solomon Islands) Regional Information Technology Strategies Meeting (6th 1999 Honiara. ITPacNet99: Sixth Regional Information Technology Strategies Meeting : FFA Regional Conference Centre, Forum Fisheries Agency, Honiara, Solomon Islands, 2nd to 4th June 1999. Honiara, Solomon Islands: The Agency, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

F, Cátedra Manuel, ed. The CG-FFT method: Application of signal processing techniques to electromagnetics. Boston: Artech House, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Catedra, Manuel F., Rafael F. Torres, Jose Basterrechea, and Emilio Gago. The CG-FFT Method: Application of Signal Processing Techniques to Electromagnetics. Artech House Publishers, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "FFF technology"

1

Lee, Seung Hee, and Young Jin Lim. "FFS Technology." In Handbook of Visual Display Technology, 1–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-35947-7_187-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lee, Seung Hee, and Young Jin Lim. "FFS Technology." In Handbook of Visual Display Technology, 2055–75. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14346-0_187.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Schultz, Christian, and Dana Mietzner. "The Technology Transfer Challenge." In FGF Studies in Small Business and Entrepreneurship, 1–8. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61477-5_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Piller, Frank, Dennis Hilgers, and Lisa Schmidthuber. "The Relevance of Technology Transfer." In FGF Studies in Small Business and Entrepreneurship, 149–63. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61477-5_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Berndt, Marko, and Dana Mietzner. "Facilitating Knowledge and Technology Transfer via a Technology Radar as an Open and Collaborative Tool." In FGF Studies in Small Business and Entrepreneurship, 207–30. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61477-5_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Landoni, Matteo, and dt ogilvie. "How Technology Travels from Old to New Firms: The Role of Employees’ Entrepreneurship in Technology Ventures." In FGF Studies in Small Business and Entrepreneurship, 263–82. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73509-2_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

McConaghy, Trent. "FFX: Fast, Scalable, Deterministic Symbolic Regression Technology." In Genetic and Evolutionary Computation, 235–60. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-1770-5_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Piller, Frank, Dennis Hilgers, Christoph Ihl, and Lisa Schmidthuber. "Using Open Innovation Platforms for Technology Transfer." In FGF Studies in Small Business and Entrepreneurship, 231–43. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61477-5_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Najmaei, Arash. "Architecture of Technology Ventures: A Business Model Perspective." In FGF Studies in Small Business and Entrepreneurship, 21–48. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73509-2_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Winter, C. J. "Entwicklungsstand und Aussichten der Solar-Wasserstoff-Technologie." In FfE Schriftenreihe der Forschungsstelle für Energiewirtschaft, 10–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-642-52288-8_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "FFF technology"

1

Ralchev, Martin, Valentin Mateev, and Iliana Marinova. "3D Printing of Magnetic Materials by FFF Technology." In 2020 12th Electrical Engineering Faculty Conference (BulEF). IEEE, 2020. http://dx.doi.org/10.1109/bulef51036.2020.9326060.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Steuben, John, Douglas L. Van Bossuyt, and Cameron Turner. "Design for Fused Filament Fabrication Additive Manufacturing." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46355.

Full text
Abstract:
In this paper, we explore the topic of Fused Filament Fabrication (FFF) 3D-printing. This is a low-cost additive manufacturing technology which is typically embodied in consumer-grade desktop 3D printers capable of producing useful parts, structures, and mechanical assemblies. The primary goal of our investigation is to produce an understanding of this process which can be employed to produce high-quality, functional engineered parts and prototypes. By developing this understanding, we create a resource which may be turned to by both researchers in the field of manufacturing science, and industrial professionals who are either considering the use of FFF-enabled technologies such as 3D printing, or those who have already entered production and are optimizing their fabrication process. In order to paint a cohesive picture for these readers, we examine several topic areas. We begin with an overview of the FFF process, its key hardware and software components, and the interrelationships between these components and the designer. With this basis, we then proceed to outline a set of design principles which facilitate the production of high quality printed parts, and discuss the selection of appropriate materials. Following naturally from this, we turn to the question of feedstock materials for FFF, and give advice for their selection and use. We then turn to the subject of the as-printed properties of FFF parts and the strong non-isotropic response that they exhibit. We discuss the root causes of this behavior and means by which its deleterious effects may be mitigated. We conclude by discussing a mixed numerical/experimental technique which we believe will enable the accurate characterization of FFF parts and structures, and greatly enhance the utility of this additive manufacturing technology. By formalizing and discussing these topics, we hope to motivate and enable the serious use of low-cost FFF 3D printing for both research and industrial applications.
APA, Harvard, Vancouver, ISO, and other styles
3

Pereira, Lucas, Todd Letcher, and Gregory J. Michna. "The Effects of 3D Printing Parameters and Surface Roughness on Convective Heat Transfer Performance." In ASME 2019 Heat Transfer Summer Conference collocated with the ASME 2019 13th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ht2019-3591.

Full text
Abstract:
Abstract Additive manufacturing technology and applications have quickly expanded into many industries over the last several years. Improvements in resolution, strength, and material options have helped propel further growth of the industry. This study focuses on an additive manufacturing technology called fused filament fabrication (FFF). FFF involves the extrusion and layer-by-layer deposition of a molten thermoplastic material to create the desired part. One potential new application of FFF is the manufacture of heat exchangers and heat sinks. This study focuses on developing baseline experimental data related to convective heat transfer coefficients over surfaces of commonly used polymers in FFF 3d printing while varying printing parameters. Samples with layer heights (LH) of 0.1 mm, 0.2 mm and 0.3 mm were printed. As the layer height increases, the surface roughness also increased. Sample 1 of LH = 0.1 mm had a roughness of 9.72 μm and at a Reynolds number of 13,200 had a heat transfer coefficient of 72.2 W/m2-K and sample 1 of LH = 0.3 mm had a roughness of 28.83 μm and at a Reynolds number of 13,600 had a heat transfer coefficient of 84.6 W/m2-K.
APA, Harvard, Vancouver, ISO, and other styles
4

Enoch, Stefan, Evgueni K. Popov, and Michel Neviere. "3D crystals dispersion relation: improved convergence using fast Fourier factorization (FFF) method." In International Symposium on Optical Science and Technology, edited by Philippe Lalanne. SPIE, 2001. http://dx.doi.org/10.1117/12.451491.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Song, Minghao, and Hongwei Sun. "Simulation and Experimental Research for Microparticles in Microchannels With Dielectrophoretic Field-Flow Fractionation." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39133.

Full text
Abstract:
The Dielectrophoretic Field-flow Fractionation (DEP-FFF) is a very promising separation technique for particles and biological molecules. To further explore this technology, we conducted a computational and experimental investigation of a single particle movement in a PDMS microfluidic channel under DEP force, where both electrokinetic effects and particle hydrodynamics are considered. The model was first validated with dipole moment theory, and a polystyrene particle (∼10 μm) behavior in a non-uniform electric field created by a pair of non-symmetrical electrodes was then studied numerically. The simulation results were compared with experimental results and a good agreement was obtained. Further research is underway to study the behavior of non-spherical particles (such as nanowire, nanorod, and nanofiber) in other microfluidic systems.
APA, Harvard, Vancouver, ISO, and other styles
6

Graf, Daniel, Simone Neermann, Lisa Stuber, Matthias Scheetz, and JOrg Franke. "Pushing the Boundaries of 3D-MID: Pulse-Width Modulated Light Technology for Enhancing Surface Properties and Enabling Printed Electronics on FFF-Printed Structures." In 2018 13th International Congress Molded Interconnect Devices (MID). IEEE, 2018. http://dx.doi.org/10.1109/icmid.2018.8526995.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Shahriar, Bakrani Balani, Chabert France, Nassiet Valerie, Cantarel Arthur, and Garnier Christian. "Toward improvement of the properties of parts manufactured by FFF (fused filament fabrication) through understanding the influence of temperature and rheological behaviour on the coalescence phenomenon." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience. Author(s), 2017. http://dx.doi.org/10.1063/1.5008034.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Nixon, Jason R., and David I. Bigio. "Effects of Variable Fiber Microstructure in Composite Fused Filament Fabrication on Physical Properties Using High Aspect Ratio Short Fibers." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51903.

Full text
Abstract:
Polymeric fused filament fabrication technology (FFF), a subfield within additive manufacturing (AM), is becoming a contender for the reintroduction of the small-scale manufacturing of customized consumer products to a mass-production dominated world market. However, before this technology can be widely implemented, there remain significant technological hurdles to overcome. One issue that has been addressed at great length in other traditional polymer manufacturing fields is the inclusion of fillers in the component for physical property enhancement or the introduction of entirely new properties to the matrix material. Experiments conducted in this study examined the inclusion of carbon microfibers (CMFs) into the matrix material prior to the printing process, and the effect of different processing parameters on the final filler structure of the composite parts post printing. Prior work on microstructural evolution during extrusion in a 3D printer has been conducted computationally to study the effects of extrusion rate, matrix rheology, and nozzle geometry on fiber orientation [1]. It was found that varying the nozzle geometry generated significantly different microstructures, and that the remainder of the parameters could be varied to fine-tune microstructural characteristics. Findings indicated that, by varying the nozzle geometry from a converging to a diverging conical section, microstructures ranging from axially oriented (with respect to the extrusion direction) to radially oriented are theoretically possible. Current work performed on extruders and FFF platforms indicates that during the extrusion process, fibers tend to align very closely to the axis of extrusion in shear flow (i.e. converging or straight dies). However, in some applications, this may not be the most effective filler structure for property enhancement, so there remains interest in exploring methodologies for fiber rotation during extrusion. For this study, CMFs and acrylonitrile butadiene styrene (ABS) were compounded using a 28mm fully-intermeshing co-rotating twin-screw (CoTSE) extruder. 3D printer feedstock was manufactured in-house. A range of concentrations from 0%wt to 15%wt fabricated and tested. Analysis of the feedstock indicated nearly axial fiber alignment post-manufacture. This feedstock was then used in a Lulzbot TAZ4 printer to manufacture composite tensile testing specimens. Printed composite properties were then identified and compared to neat ABS and bulk composite properties. It was found that using a purely converging die, highly aligned filler structures were produced (with respect to the bead laid by the printer). Using a diverging nozzle, more random filler structures were produced. Improvements in both intra-layer properties were observed using the diverging nozzle geometries to reorient fibers during extrusion. Property improvements were not found to be as high as longitudinal properties for highly aligned filler structures. Using insights gained through these experiments, we are currently working on exploring added functionality for the composites using different types of fillers as well as multi-scale filler combinations.
APA, Harvard, Vancouver, ISO, and other styles
9

Aboutaleb, Amir M., Linkan Bian, Prahalad K. Rao, and Mark A. Tschopp. "Accelerated Geometry Accuracy Optimization of Additive Manufacturing Parts." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2892.

Full text
Abstract:
Despite recent advances in improving mechanical properties of parts fabricated by Additive Manufacturing (AM) systems, optimizing geometry accuracy of AM parts is still a major challenge for pushing this cutting-edge technology into the mainstream. This work proposes a novel approach for improving geometry accuracy of AM parts in a systematic and efficient manner. Initial experimental data show that different part geometric features are not necessary positively correlated. Hence, it may not be possible to optimize them simultaneously. The proposed methodology formulates the geometry accuracy optimization problem as a multi-objective optimization problem. The developed method targeted minimizing deviations within part’s major Geometric Dimensioning and Tolerancing (GD&T) features (i.e., Flatness, Circularity, Cylindricity, Concentricity and Thickness). First, principal component analysis (PCA) is applied to extract key components within multi-geometric features of parts. Then, experiments are sequentially designed in an accelerated and integrated framework to achieve sets of process parameters resulting in acceptable level of deviations within principal components of multi-geometric features of parts. The efficiency of proposed method is validated using simulation studies coupled with a real world case study for geometry accuracy optimization of parts fabricated by fused filament fabrication (FFF) system. The results show that optimal designs are achieved by fewer numbers of experiments compared with existing methods.
APA, Harvard, Vancouver, ISO, and other styles
10

Liu, Chenang, Chen Kan, and Wenmeng Tian. "An Online Side Channel Monitoring Approach for Cyber-Physical Attack Detection of Additive Manufacturing." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8503.

Full text
Abstract:
Abstract Due to its predominant flexibility in fabricating complex geometries, additive manufacturing (AM) has gain increasing popularity in various mission critical applications, such as aerospace, health care, military, and transportation. The layerby-layer manner of AM fabrication significantly expands the vulnerability space of AM cyber-physical systems, leading to potentially altered AM parts with compromised mechanical properties and functionalities. Moreover, internal alterations of the build are very difficult to detect based on traditional geometric dimensioning and tolerancing (GD&T) features. Therefore, how to achieve effective monitoring and attack detection is a very important problem for broader adoption of AM technology. To address this issue, this paper proposes to utilize side channels for process authentication. An online feature extraction approach is developed based on autoencoder to detect unintended process/product alterations caused by cyber-physical attacks. Both supervised and unsupervised monitoring schemes are implemented based on the extracted features. To validate the effectiveness of the proposed method, two real-world case studies are conducted on a fused filament fabrication (FFF) platform equipped with two accelerometers for process monitoring. Two different types of attacks are implemented. The results demonstrate that the proposed method outperforms conventional process monitoring methods, and can effectively detect part geometry and layer thickness alterations in real time.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "FFF technology"

1

Meot, Francois. RACCAM: An example of spiral sector scaling FFA technology. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1507116.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Hepner, David J., Michael J. Hollis, and Charles E. Mitchell. Yawsonde Technology for the Jet Propulsion Laboratory (JPL) Free Flying Magnetometer (FFM) Program. Fort Belvoir, VA: Defense Technical Information Center, July 1998. http://dx.doi.org/10.21236/ada352980.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Geyer, Anton. Konzeptevaluierung der Initiative TECXPORT. FFG - Austrian Research Promotion Agency, July 2021. http://dx.doi.org/10.22163/fteval.2021.525.

Full text
Abstract:
Das Bundesministerium für Klimaschutz, Umwelt, Energie, Mobilität, Innovation und Technologie (BMK) startete im Jahr 2017 die Initiative TECXPORT zur Unterstützung des Technologietransfers und des Technologieexports der österreichischen Wirtschaft. Mit der operativen Durchführung der Initiative hat das BMK die Österreichische Forschungsförderungsgesellschaft (FFG) beauftragt. In Vorbereitung und Begleitung der TECXPORT-Initiative hatte das BMK Studien in Auftrag gegeben, um die volkswirtschaftlichen Effekte des Technologie-Exports zu ermitteln. Diese Studien bestätigten den substanziellen Beitrag technologieexportierender österreichischer Unternehmen am Gesamtexportumsatz, wobei gleichzeitig nach wie vor Nachholbedarf im EU-Vergleich konstatiert wurde.
APA, Harvard, Vancouver, ISO, and other styles
4

Heckl, Eva, and Joachim Kaufmann. Evaluierung des Programms Forschungspartnerschaften – industrienahe Dissertationen. KMU Forschung Austria, December 2020. http://dx.doi.org/10.22163/fteval.2020.496.

Full text
Abstract:
This evaluation was conducted on behalf of the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology (BMK) and examines the programme Research Partnerships – Industrial PhD with regard to its concept, implementation, achievement of objectives and impacts. Based on the results of this analysis, the evaluators draw conclusions for the further development of the programme. The evaluation covers the period from 2014 to mid-2020. The methodological basis of the evaluation is a document analysis, a secondary data analysis of the FFG project monitoring data, expert interviews, an online survey of funding recipients and a workshop.
APA, Harvard, Vancouver, ISO, and other styles
5

Tiefenthaler, Brigitte. Evaluierung des Netzwerks Altern. Endbericht. Technopolis Group - Austria, 2019. http://dx.doi.org/10.22163/fteval.2019.506.

Full text
Abstract:
In 2015, the Federal Ministry of Education, Science and Research (BMBWF), together with the Federal Ministry of Transport, Innovation and Technology (BMVIT), the Austrian Research Promotion Agency (FFG) and other partners, founded the initiative "Strategic Networking Platforms in the Context of Major Societal Challenges", including such a platform on issues of demographic change. The BMBWF has commissioned the Austrian Platform for Interdisciplinary Ageing Issues(ÖPIA) with its implementation. The three-year BMBWF funding for the Ageing Network expired in mid-2019. Therefore, Department V/10 of the BMBWF commissioned Technopolis Group Austria to evaluate the Ageing Network. The aim of this evaluation was to form a basis for the decision on the further funding of the Network Ageing after the expiry of the current contract. To this end, we analysed and evaluated what has been achieved so far and developed recommendations for the future work of the Network Ageing. Translated with www.DeepL.com/Translator (free version)
APA, Harvard, Vancouver, ISO, and other styles
6

Pichler, Rupert. The Research Financing Act. A New Framework for Publicly Funded Research in Austria and its Impact on Evaluation. Fteval - Austrian Platform for Research and Technology Policy Evaluation, July 2021. http://dx.doi.org/10.22163/fteval.2021.514.

Full text
Abstract:
On 7 July 2020, the National Council – the first chamber of the Austrian Parliament – passed a package of legislation introducing a new framework for the methods of allocating federal budgets to research, technology, and innovation (RTI). Its core is the Research Financing Act (RFA), complemented by several amendments to existing laws that are necessary for its implementation. Entry into force was on 25 July 2020, the amendments became effective as of 1 January 2021 (BGBl1. I No. 75/20202). The RFA is the biggest legislative project in the field of RTI policy since 2004 when the Research Funding Agency (FFG) was established (Pichler et al. 2007, pp. 329-336; Stampfer et al. 2010, pp. 775-776). For the first time, budget law regulations are now aligned with the needs of institutions performing or funding RTI (Pichler 2021). This article outlines the background and content of the RFA and concludes with a view on the significance of evaluation within the new system.
APA, Harvard, Vancouver, ISO, and other styles
7

Williams, Bruce A. Statement of Work for Direct Push Technology Characterization Borehole Installations During Fiscal Year 2006, 300-FF-5 Operable Unit. Office of Scientific and Technical Information (OSTI), November 2005. http://dx.doi.org/10.2172/889092.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Warta, Katharina, Tobias Dudenbostel, María del Carmen Calatrava Moreno, Francesca Guadagno, Simon Zingerle, Sandra Skok, and Harald Grill. Evaluierung des COMET-Programms. Technopolis Group - Austria, June 2021. http://dx.doi.org/10.22163/fteval.2022.524.

Full text
Abstract:
Technopolis wurde im Mai 2020 vom Bundesministerium für Klimaschutz, Umwelt, Energie, Mobilität, Innovation und Technologie (BMK) und dem Bundesministerium für Digitalisierung und Wirtschaftsstandort (BMDW) mit der Evaluierung des COMET-Programms beauftragt. Die vorliegende Evaluierung bezieht sich auf die 25 aktuell existierenden Zentren. Der Fokus der Evaluierung liegt auf der Charakterisierung der COMET-Zentren und auf dem Monitoring- und Kennzahlensystem von COMET. Im Jahr der Corona-Pandemie wurden die Methoden angepasst, Interviews mit Stakeholdern und den Zentren wurden meist per Videocalls oder telefonisch geführt, geplante on-site Visits sowie internationale Workshops konnten nicht durchgeführt werden. Zentrale Quellen der Evaluierung sind eine Befragung der Zentren und der Unternehmens- und Wissenschaftspartner sowie die Datenbasis der FFG, die wir durch diverse Harmonisierungsschritte für neuwertige Auswertungen nutzbar machten. Dies umfasst insbesondere einen historischen Rückblick sowie eine Cluster- und Netzwerkanalyse. Die Auswartungen sind in zwei Dashboards angelegt, das Dashboard zur COMET-Befragung ist anonymisiert und daher öffentlich zugänglich.
APA, Harvard, Vancouver, ISO, and other styles
9

Dorr, Andrea, Eva Heckl, and Joachim Kaufmann. Evaluierung des Förderschwerpunkts Talente. KMU Forschung Austria, December 2020. http://dx.doi.org/10.22163/fteval.2020.495.

Full text
Abstract:
With the funding programme Talents, the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology (BMK) supports people in applied research throughout their entire career. The overarching goal is to increase the utilisation of human potential in the application-oriented, scientific and technical RTI sector. The programme objectives are 1) to inspire young people for research and development, 2) to connect researchers with the economic sector, 3)to guarantee equal opportunities for all. Within the framework of three fields of intervention, there are various programme lines: 1) Intervention field Young Talents with the programme lines Internships for Students and Talents Regional, 2) Intervention field Female Talents with the programme lines FEMtech Internships for Female Students, FEMtech Career and FEMtech Career Check for SMEs (2015 and 2016), as well as FEMtech Research Projects; and 3) Intervention field Professional Talents with the programme lines The Austrian Job Exchange for Research, Development and Innovation as well as Career Grants for Interviews, Relocation and Dual Careers in Applied Research. After an interim evaluation in 2014, a final evaluation took place at the end of the programme period (end of 2020). The programme was analysed with regard to its conception, implementation, achievement of objectives and impact. Furthermore, conclusions and recommendations for the further development of the Talents programme have been drawn. The methodological basis of the evaluation is a document analysis, secondary data analysis (FFG monitoring data), interviews with experts, online surveys of funding recipients (FEMtech Career / FEMtech Career Check for SMEs and Career Grants), case studies (FEMtech Career projects) and workshops.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'FFF technology' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography