| 1. |
- Tang, Zheng, et al.
(författare)
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Interlayer for Modified Cathode in Highly Efficient Inverted ITO-Free Organic Solar Cells
- 2012
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 24:4, s. 554-
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Tidskriftsartikel (refereegranskat)abstract
- Inverted polymer solar cells with a bottom metal cathode modified by a conjugated polymer interlayer show considerable improvement of photocurrent and fill factor, which is due to hole blocking at the interlayer, and a modified surface energy which affects the nanostructure in the TQ1/[70]PCBM blend.
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| 2. |
- Abel, I, et al.
(författare)
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Overview of the JET results with the ITER-like wall
- 2013
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 1741-4326 .- 0029-5515. ; 53:10, s. 104002-
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Tidskriftsartikel (refereegranskat)abstract
- Following the completion in May 2011 of the shutdown for the installation of the beryllium wall and the tungsten divertor, the first set of JET campaigns have addressed the investigation of the retention properties and the development of operational scenarios with the new plasma-facing materials. The large reduction in the carbon content (more than a factor ten) led to a much lower Z(eff) (1.2-1.4) during L- and H-mode plasmas, and radiation during the burn-through phase of the plasma initiation with the consequence that breakdown failures are almost absent. Gas balance experiments have shown that the fuel retention rate with the new wall is substantially reduced with respect to the C wall. The re-establishment of the baseline H-mode and hybrid scenarios compatible with the new wall has required an optimization of the control of metallic impurity sources and heat loads. Stable type-I ELMy H-mode regimes with H-98,H-y2 close to 1 and beta(N) similar to 1.6 have been achieved using gas injection. ELM frequency is a key factor for the control of the metallic impurity accumulation. Pedestal temperatures tend to be lower with the new wall, leading to reduced confinement, but nitrogen seeding restores high pedestal temperatures and confinement. Compared with the carbon wall, major disruptions with the new wall show a lower radiated power and a slower current quench. The higher heat loads on Be wall plasma-facing components due to lower radiation made the routine use of massive gas injection for disruption mitigation essential.
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| 3. |
- Ahrens, Jens, 1978, et al.
(författare)
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Tutorial on scaling of the discrete fourier transform and the implied physical units of the spectra of time-discrete signals
- 2020
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Ingår i: 148th Audio Engineering Society International Convention.
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Konferensbidrag (refereegranskat)abstract
- The combination of the time-discrete property of digital signals together with the commonly employed definition of the discrete Fourier transform (DFT) can cause ambiguity when interpreting magnitude spectra with respect to the physical unit of the signal under consideration. Standardized scaling of spectra increases the comparability of frequency-domain data that are published in scientific articles or data sheets of commercial products. We present and discuss in this tutorial a collection of the most relevant scaling options for DFT spectra to yield amplitude spectra, power spectra, and power density spectra, and we illustrate how an implied physical unit of the underlying signal is reflected by the magnitude of the spectrum. The tutorial is accompanied by Matlab/Octave scripts that demonstrate the different cases.
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| 4. |
- Almefelt, Lars, 1968, et al.
(författare)
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Exploring Requirements Management in the Automotive Industry
- 2003
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Ingår i: 14th International Conference on Engineering Design Research for Practice - innovative products, processes and organisations.
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Konferensbidrag (refereegranskat)abstract
- This paper presents an empirical study carried out in the automotive industry, with the aim to bring forward new experiences and knowledge on management of requirements in practice. Adopting a qualitative systems approach, and using multiple information sources, the requirements management process during the development of a passenger car cockpit has been mapped out. The logical reconstruction of the requirements management process is complemented with descriptions of associated phenomena, such as important events and attitudes. Findings are presented, analysed and discussed considering also factors underlying observed phenomena.
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| 5. |
- Andersson, Fredrik, 1974, et al.
(författare)
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Computer Based Requirements and Concept Modelling - Information Gathering and Classification
- 2000
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Ingår i: 12th International Conference on Design Theory and Methodology. 2000 ASME International Design Engineering Technical Conferences.
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Konferensbidrag (refereegranskat)abstract
- This paper proposes a requirement and concept model based on a functional decomposition of mechanical systems. It is an object-oriented approach to integrate the representation of the design artefact and the design activity, through the decisions made during the design evolution. The requirements co-evolve simultaneously with the formation of the conceptual layout, through the opportunity to alter between function and physical/abstract solutions. This approach structures the design requirements and concepts in such a way that it supports the ability to document their sources, to allow for validation and verifications of both requirements and design solutions. First, the proposed model is presented from a theoretical viewpoint. Secondly, a methodology for modelling requirements and concepts in an object-oriented fashion is discussed. Finally, the model is implemented in METIS software and tested in a case study of an electric window winder on a truck door.
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| 6. |
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| 7. |
- Andersson, Joakim, 1964, et al.
(författare)
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Big Data in spare parts supply chains: The potential of using product-in-use data in aftermarket demand planning
- 2018
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Ingår i: International Journal of Physical Distribution and Logistics Management. - 0960-0035. ; 48:5, s. 524-544
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this paper is to explore and propose how product-in-use data can be used in, and improve the performance of, the demand planning process for automotive aftermarket services. A literature review and a single-case study investigate the underlying reasons for the demand for spare parts by conducting in-depth interviews, observing actual demand-generating activities, and studying the demand planning process. This study identifies the relevant product-in-use data and divides them into five main categories. We have analysed how product-in-use data is best utilised, in planning spare parts with different attributes, e.g. different life-cycle phases and demand frequencies. Furthermore, we identify eight potentially relevant areas of application of product-in-use data in the demand planning process, and elaborate on their performance effects. This study details the understanding of what impact context has on the potential performance effects of using product-in-use data in aftermarket demand planning. Propositions generate several strands for future research. This study shows the potential impact of using product-in-use data, using eight different types of interventions for spare parts, in the aftermarket demand planning. The literature focuses on single applications of product-in-use data, but would benefit from considering the context of application. This study presents interventions and explores how these enable improved demand planning by analysing usage and effects.
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| 9. |
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| 10. |
- Andersson, Joakim, 1964, et al.
(författare)
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Sales and operations execution: An explorative study on potential effects
- 2020
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Ingår i: Proceedings of the Nofoma conference 2020.
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Konferensbidrag (refereegranskat)abstract
- Purpose Sales and operations planning have a long history in practice and has been researched extensively. It has been proposed that this tactical concept needs to be aligned with a more operational, short-term concept, hence the purpose of this paper is to investigate how sales and operations execution (S&OE) can enhance the performance of a supply chain by analyzing contingency factors regarding design and use. Methodology A multiple-case study approach investigates the potential outcome of implementing a S&OE process in various contexts. Empirical data from several firms in various industries are analyzed according to common and unique factors affecting the potential result. Findings his study identifies critical design for an S&OE process to have a positive outcome in different contexts. Furthermore, relevant data is identified, as well as actors essential for successful usage. Finally, we present, by using knowledge management theory, the importance of integrating S&OE in the planning hierarchy and how the S&OE practice leads to results. Research implications This study details the understanding of how sales and operations execution affects the supply chain performance, given different contextual aspects. Practical implications This study shows the potential impact of implementing S&OE for different types of businesses, as well as giving guiding principles for its design. Original/value S&OE as a concept is today merely described as white papers and consultancy reports. To our best knowledge, this is the first academic study that explores the sales and execution phenomenon in a real-world context.
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