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High Speed Ground Transport: Overview of The Technologies
Published in Thomas Lynch, High Speed Rail in the U.S. Super Trains for the Millennium, 2020
In Germany, the attraction mode electromagnetic “TRANS-RAPID” Maglev system has been under development for high speed ground transportation since the late 1960s. Evolutionary development through a series of test vehicles led to the construction of the Emsland facility in the early 1980s. This 31.5 km figure-of-eight shaped guide-way allows full scale vehicles to be tested and demonstrated under close to operational conditions. The pre-production vehicle TR-07 has been under evaluation for almost five years, and has now shown itself to be ready for implementation at speeds of 400-450 km/h. This technology has been selected by the German government for a new line from Hamburg to Berlin by the middle of the first decade of the 21st century to enhance east-west travel links following the reunification of Germany.
Management and Leadership – The Two Key Skills
Published in Wilson Lonnie, Sustaining Workforce Engagement, 2019
Earlier, in Chapter 6, we discussed the Theta cell, which was designed to produce a headrest for Toyota. This cell was one of five value streams in this plant. This cell was U-shaped in design. It was a tier two value stream and was staffed with 16 workers. The design of the cell was such that at modest defect rates, the profitability was very labor-sensitive. Target profitability required the productivity be 100 headrests/person/day (hpppd). Following PPAP and a brief start-up period, the cell leveled out at 65 hpppd. (PPAP is an abbreviation for the production parts approval process, which is a pre-production standard in the automotive industry.)
Rapid Tooling and the LOMOLD process
Published in Paulo Jorge Bártolo, Artur Jorge Mateus, Fernando da Conceição Batista, Henrique Amorim Almeida, João Manuel Matias, Joel Correia Vasco, Jorge Brites Gaspar, Mário António Correia, Nuno Carpinteiro André, Nuno Fernandes Alves, Paulo Parente Novo, Pedro Gonçalves Martinho, Rui Adriano Carvalho, Virtual and Rapid Manufacturing, 2007
D. Dimitrov, E.F. Joubert, N. de Beer
The only advantage that the AFET has over the HSC-Aluminium tool is a shorter lead-time and a marginal cost improvement. In terms of tool life and part geometric accuracy, the HSC-Aluminium tool is superior. Considering this information, the application of AFET is recommended for small volume, prototype and pre-production runs. It should be ideal for tool design confirmation, part functional testing and part appearance testing.
Quantum computing to solve scenario-based stochastic time-dependent shortest path routing
Published in Transportation Letters, 2023
Vinayak V. Dixit, Chence Niu, David Rey, S. Travis Waller, Michael W. Levin
Recently, there are more studies focusing on the transport optimization problems solved by quantum computing, such as drive cycles estimation (Dixit and Jian 2022b), transport network design problems (Dixit and Niu 2022), traveling salesman problems (Jain 2021; Warren 2020), pre-production vehicle configurations problem (Glos, Kundu, and Salehi 2022), logistics optimization problem (Sales and Araos 2023), Vehicle Routing Problems as well as its variants such as multi-depot capacitated vehicle routing problem (MDCVRP) and its dynamic version (Harikrishnakumar et al. 2020), Traffic signal control (Hussain et al. 2020) and) Redistributing and rerouting vehicles for optimal network utilization (Neukart et al. 2017). Both the gate-based quantum computing with 15 qubits and quantum annealing with thousands of qubits are used to solve optimization problems. Compared with the traditional methods, quantum computing shows the potential of vast computing power and advanced capacities for large-scale problems. The problems are usually formulated as Quantum Fourier transform, QUBO and mixed integer programming model with different solvers. With more qubits and better connection, quantum computing is able to build a more efficient and sustainable transportation ecosystem.
Digital prototyping, open design, and sustainability in industrial design education: a case study
Published in Digital Creativity, 2023
A prototype is defined as ‘a pre-production functional representation of some aspect of a product service or system’ (Camburn and Wood 2018), although the role of prototypes has been evolving along with the design field. The main aim of prototyping is defined as ‘to produce information for design processes and design decisions, as well as to explore and communicate propositions about the design and its context’ (Kurvinen, Koskinen, and Battarbee 2008). The broader definition of prototypes exceeds the physical object but also includes other design tools such as storytelling, scenarios, and co-design toolkits employed during the fuzzy front end of the design process (Sanders 2014). Moreover, Schrage (2014) defines the prototype as ‘a tool for discovery, insight, and test’ and the process of interaction it evokes during the design process as ‘serious play’ (Schrage 1999).
Evolution of process capability in a manufacturing process
Published in Journal of Management Analytics, 2018
Sérgio Sousa, Nuno Rodrigues, Eusébio Nunes
This paper will study the selection of quality control mechanisms to be adopted in mass production that can be made at pre-production analysis based on capability studies of potential critical product variables. Then, it will assess over two years the evolution of such variables and describes the definition of quality improvement project when its quality level decreases. This specific design of an SPC, in terms of sample size, sample frequency, type of control charts or procedure is out of the scope of this work despite its relevancy in detecting process variation and contribution to process costs (Muhammad, Farooq, Nóvoa, & Araújo, 2017). Finally, it will discuss the need to periodically review quality control mechanisms.