| 1. |
- Chen, Zhe, et al.
(författare)
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Nano-scale characterization of white layer in broached Inconel 718
- 2017
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Ingår i: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. - Amsterdam : Elsevier BV. - 0921-5093 .- 1873-4936. ; 684, s. 373-384
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Tidskriftsartikel (refereegranskat)abstract
- The formation mechanism of white layers during broaching and their mechanical properties are not well investigated and understood to date. In the present study, multiple advanced characterization techniques with nano-scale resolution, including transmission electron microscopy (TEM), transmission Kikuchi diffraction (TKD), atom probe tomography (APT) as well as nano-indentation, have been used to systematically examine the microstructural evolution and corresponding mechanical properties of a surface white layer formed when broaching the nickel-based superalloy Inconel 718.TEM observations showed that the broached white layer consists of nano-sized grains, mostly in the range of 20–50 nm. The crystallographic texture detected by TKD further revealed that the refined microstructure is primarily caused by strong shear deformation. Co-located Al-rich and Nb-rich fine clusters have been identified by APT, which are most likely to be γ′ and γ′′ clusters in a form of co-precipitates, where the clusters showed elongated and aligned appearance associated with the severe shearing history. The microstructural characteristics and crystallography of the broached white layer suggest that it was essentially formed by adiabatic shear localization in which the dominant metallurgical process is rotational dynamic recrystallization based on mechanically-driven subgrain rotations. The grain refinement within the white layer led to an increase of the surface nano-hardness by 14% and a reduction in elastic modulus by nearly 10% compared to that of the bulk material. This is primarily due to the greatly increased volume fraction of grain boundaries, when the grain size was reduced down to the nanoscale.
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| 2. |
- Engzell, Jeanette, 1989-, et al.
(författare)
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Academic intrapreneurs navigating multiple institutional logics : An integrative framework for understanding and supporting intrapreneurship in universities
- 2024
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Ingår i: Technovation. - : Elsevier. - 0166-4972 .- 1879-2383. ; 129
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Tidskriftsartikel (refereegranskat)abstract
- Although several studies have extensively discussed the role of intrapreneurs, individuals’ experiences of intrapreneurial processes in the academic context remain largely unexplored. The prominence of intrapreneurial logic in academia has led to increased institutional complexity and highlighting the need for an improved understanding of how to navigate multiple logics present at individual, organizational, and field levels to attain the desired intrapreneurial outcomes. To address these challenges, we propose an integrative framework that captures both organizational and individual-level responses to these multiple logics, while also incorporating intrapreneurial logic. Upon analyzing data from nineteen intrapreneurs across three universities, this study reveals that universities actively uphold the academic logic that intrapreneurs identify as a barrier, compelling them to refine their skills and actively hybridize logics by integrating multiple specific elements of intrapreneurship, teaching, and research. Simultaneously, universities incorporate intrapreneurial logic into their operational processes, even combining multiple logics, which intrapreneurs leverage within their own activities to push their ideas forward. The study offers implications for intrapreneurship literature, academic management, and policymakers to more effectively foster intrapreneurial activities.
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| 3. |
- Frei, R., et al.
(författare)
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Evolvable assembly systems : Towards user friendly manufacturing
- 2007
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Ingår i: ISAM 2007 - IEEE International Symposium on Assembly and Manufacturing. - : IEEE. - 1424405637 - 9781424405633 ; , s. 288-293
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Konferensbidrag (refereegranskat)abstract
- Besides coping with the highly dynamic product and production system life cycles with ever-changing requirements, modern assembly systems also need to be user-friendly. Their modularity at fine granularity-level combined with local intelligence and a distributed control approach allows the systems to evolve together with the requirements - but their complexity would soon not be manageable from outside any more if user-friendliness was not considered a major criterion. Systems must be made to serve their users. Thanks to Self-* capabilities, systems can gain an increasingly high degree of autonomy. Diagnosis plays a particularly important role in this process.
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| 4. |
- Gremyr, Ida, 1975, et al.
(författare)
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A developmental view on implementation of quality management concepts
- 2014
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Ingår i: International Journal of Quality and Service Sciences. - : Emerald Group Publishing Limited. - 1756-669X .- 1756-6703. ; 6:2/3, s. 143-154
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – The purpose of this paper is to examine the value of a developmental learning view on implementation of quality management (QM) concepts. QM concepts are common in various organizations; some implement them smoothly, others struggle and sometimes even abandon the initiatives. What is then a successful implementation – is it the use a specific QM method as a standard problem solving approach, or is it that learning has occurred during implementation?Design/methodology/approach – The paper is based on an illustrative case study carried out at a hospital in western Sweden. The data have been collected through about 130 hours of participation in project work by the first author and through seven face-to-face interviews of about one hour each.Findings – It is shown that a Design for Six Sigma pilot project with a narrow view on implementation could be regarded as a failure, but it gave rise to much learning and new improved ways of working. Hence, it is argued that a developmental view on implementation can support learning by an emergent and experimental approach to implementation processes.Originality/value – Much research has been done on how to increase the success rate of implementations of QM initiatives, e.g. procedures to follow to reach an outcome where the new way of working is standard procedure. Less research has problematized the implementation process, questioning what a successful outcome of an implementation is.
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| 5. |
- Grimsberg, Michaël, et al.
(författare)
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Vem styr egentligen grundutbildningen?
- 2015
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Ingår i: Proceedings 5:e Utvecklingskonferensen för Sveriges ingenjörsutbildningar, Uppsala universitet, 18 – 19 november 2015. - : Uppsala universitet. ; , s. 18-22
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Konferensbidrag (refereegranskat)abstract
- Vi belyser olikheter och likheter i hur grundutbildningen styrs på fyra svenska tekniska högskolor. Vi jämför hur lärare och examinatorer väljs ut, hur medel fördelas och vilken roll programansvariga (eller motsvarande) har. De strukturella skillnaderna är relativt stora med störst autonomi för programansvariga på Chalmers tekniska högskola vilket delvis har att göra med att detta lärosäte lyder under aktiebolagslagen.
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| 6. |
- Thunberg, Micael, 1986-, et al.
(författare)
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Identifying and positioning construction supply chain planning problems
- 2014
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Ingår i: Proceedings 30th Annual Association of Researchers in Construction Management Conference, ARCOM 2014. - Reading : Association of Researchers in Construction Management. - 9780955239083 ; , s. 1069-1078
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Konferensbidrag (refereegranskat)abstract
- The construction industry struggles with an ineffective supply chain. A literature review, in combination with an empirical study aims at identifying and positioning perceived supply chain planning problems. The empirical part is a series of semi-structured interviews with construction site managers, purchase coordinators, and a project leader. Most site managers are responsible for mid-sized turnkey contracts, which enable comparison. Findings show that most of the supply chain planning problems relate to lack of coordination between actors, and that many of the problems discovered on-site originate from the supply process or the design process. Through proactive coordination of the actors in the supply chain planning process and the actors in the construction process, the problems on-site causing "fire-fighting"-activities could be reduced.
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| 7. |
- Blissing, Björn, 1978-, et al.
(författare)
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Exploring the suitability of virtual reality for driving simulation
- 2018
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Ingår i: Proceedings of the Driving Simulation Conference 2018. - Antibes, France. - 9782857827344 ; , s. 163-166, s. 163-166
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Konferensbidrag (refereegranskat)abstract
- Head mounted displays (HMDs) is an emerging technology and the availability of affordable systems is growing fast. Replacing projector and large screen solutions with head mounted displays may appear as an appealing solution. However, inherent properties and technical limitations of these systems need to be understood and considered before making the leap to virtual reality.This paper outlines some of the most fundamental limitations of head mounted displays relevant to this context, both from a technical and human factors perspective. Desirable properties of scenarios and types of studies are deduced, based on these limitations. Finally, a meta analysis is performed on the feasibility of transferring simulator studies found in the literature to platforms with head mounted displays. The results suggest that a noticeable amount (40%) of the investigated simulator studies could likely have been performed with head mounted displays. This number could be increased further with technical advances in display resolution, display technology, reduction in latency, etc.
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| 8. |
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| 9. |
- Xiong, Kunli, 1987, et al.
(författare)
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Active control of plasmonic colors: emerging display technologies
- 2019
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Ingår i: Reports on Progress in Physics. - : IOP Publishing. - 0034-4885 .- 1361-6633. ; 82:2
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Forskningsöversikt (refereegranskat)abstract
- In recent years there has been a growing interest in the use of plasmonic nanostructures for color generation, a technology that dates back to ancient times. Plasmonic structural colors have several attractive features but once the structures arc prepared the colors arc normally fixed. Lately, several concepts have emerged for actively tuning the colors, which opens up for many new potential applications, the most obvious being novel color displays. In this review we summarize recent progress in active control of plasmonic colors and evaluate them with respect to performance criteria for color displays. It is suggested that actively controlled plasmonic colors are generally less interesting for emissive displays but could be useful for new types of electrochromic devices relying on ambient light (electronic paper). Furthermore, there are several other potential applications such as images to be revealed on demand and colorimetric sensors.
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| 10. |
- Abdul Malek, Nurul Aida, et al.
(författare)
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Analyzing Sustainable Competitive Advantage : Strategically Managing Resource Allocations to Achieve Operational Competitiveness
- 2015
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Ingår i: Management and Production Engineering Review. - : De Gruyter Open. - 2080-8208 .- 2082-1344. ; 6:4, s. 70-86
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Tidskriftsartikel (refereegranskat)abstract
- In today’s dynamic business environment, a key challenge for all companies is to make adaptive adjustments to their manufacturing strategy. This study demonstrates the competitive priorities of manufacturing strategy in hydro-power case company to evaluate the level of sustainable competitive advantage and also to further analyze how business strategies are aligned with manufacturing strategies. This research is based on new holistic analytical evaluation of manufacturing strategy index, sense and respond, and sustainable competitive advantage models. These models help to describe, evaluate, and optimize resource allocation to meet the performance requirements in dynamic decision making. Furthermore, these models evaluate operational competitiveness for manufacturing strategies according to the multi-criteria priority. The results show that the adjustments of competitive priorities in manufacturing strategies by implementing the proposed holistic analytical models are helpful in strategically managing business operations. The discussion derives the most critical attributes in business operations while alignment of resource allocation with competitive priorities help to strategically focus those attributes. In conclusion, we argue that resource allocation and manufacturing strategies have become the most important capabilities in a business environment where companies focus to get a sustainable competitive advantage.
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