| 1. |
- Karlkvist, Tommy, et al.
(författare)
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Molecular recognition in mineral flotation : Selectivity in apatite-calcite system
- 2014
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Ingår i: 27th International Mineral Processing Congress, IMPC 2014, Santiago, Chile, 20-24 October 2014.
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Konferensbidrag (refereegranskat)abstract
- The present investigation aims to develop and distinguish mineral specific reagents with two functional groups for use in flotation of calcium containing minerals. For this purpose, a series of dicarboxylate-based surfactants with varying length between the carboxylate groups (one, two or three methylene groups) were synthesized. As reference, a surfactant with the same alkyl chain length but with only one carboxylate group in the polar part was synthesized. The adsorption behavior of these new reagents on pure apatite and calcite mineral surfaces was studied using Hallimond tube flotation, FTIR and ζ potential measurements. The relation between the adsorption behavior of a given surfactant on a specific mineral surface and its molecular structure over a range of concentration and pH values, as well as the region of maximum recovery were established. It was found that one of the reagents, with a specific distance between the carboxylate groups, was much more selective for a particular mineral surface than the other homologues synthesized. This selective adsorption of a given surfactant to a particular mineral surface relative to other mineral surfaces as evidenced in flotation studies is substantiated by ζ potential and infra-red spectroscopy data.
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| 2. |
- Anna, Malm, 1978, et al.
(författare)
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Production start-up phase - A comparison between New Product Development and Production Relocation
- 2012
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Ingår i: Proceedings of the 5th International Swedish Production Symposium. - 9789175197524 ; , s. 593-598
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Konferensbidrag (refereegranskat)abstract
- New product development in a globalized industrial environment with a constant increasing competition, challenges the ways to perform production start-up and production relocation. A product development process focuses in general on product function and to avoid product quality problems. A production relocation focus also on avoiding product quality problems, but relocation is mostly related to forgotten or misunderstood information. The challenging situation due to a more global market is the increasing need for production relocation. In this paper, a literature review is performed investigating these three areas and relate them with industrial experience from production relocations. To summaries, the existing processes in industry today seem to be based on processes for product development. The results view that effectiveness in production relocation are dependent on technology and knowledge transfer and the production start-up process.
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| 3. |
- Eriksson, Victor, 1990, et al.
(författare)
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The role of public actors in construction logistics: effects on and of relational interfaces
- 2021
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Ingår i: Construction Management and Economics. - Abingdon, Oxon, United Kingdom : Informa UK Limited. - 1466-433X .- 0144-6193. ; 39:10, s. 791-806
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Tidskriftsartikel (refereegranskat)abstract
- Public actors are increasingly enforcing the use of specifically designed construction logistics setups (CLS) to cope with logistical challenges and minimising disturbances on third parties in large construction projects. The organising of these CLS is contingent on the interaction among several types of actors. The purpose of the paper is to advance the understanding of the design and use of CLS and the distribution of various outcomes of such arrangements on the actors involved. The paper analyses the role of public actors in the initiating of CLS and how this affects the relational interfaces in the CLS triad of developers, contractors and logistics service providers, and the outcomes of their interactions. First, the main reason for a public actor to initiate a CLS is not cost, productivity or innovativity gains, but to decrease disturbances on third parties. Second, developers and contractors are forced to use the CLS initiated by the public actor. This makes them take on a forced customer role, explaining why these actors are often resistant to adopt to a certain CLS. Third, ripple effects, such as unintended costs and productivity impacts, occur in the construction supply chain because of the use of CLS.
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| 4. |
- Leo, Christoph, et al.
(författare)
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Holistic pedestrian safety assessment for average males and females
- 2023
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Ingår i: Frontiers in Public Health. - : Frontiers Media S.A.. - 2296-2565. ; 11
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Tidskriftsartikel (refereegranskat)abstract
- Objective: An integrated assessment framework that enables holistic safety evaluations addressing vulnerable road users (VRU) is introduced and applied in the current study. The developed method enables consideration of both active and passive safety measures and distributions of real-world crash scenario parameters. Methods: The likelihood of a specific virtual testing scenario occurring in real life has been derived from accident databases scaled to European level. Based on pre-crash simulations, it is determined how likely it is that scenarios could be avoided by a specific Autonomous Emergency Braking (AEB) system. For the unavoidable cases, probabilities for specific collision scenarios are determined, and the injury risk for these is determined, subsequently, from in-crash simulations with the VIVA+ Human Body Models combined with the created metamodel for an average male and female model. The integrated assessment framework was applied for the holistic assessment of car-related pedestrian protection using a generic car model to assess the safety benefits of a generic AEB system combined with current passive safety structures. Results: In total, 61,914 virtual testing scenarios have been derived from the different car-pedestrian cases based on real-world crash scenario parameters. Considering the occurrence probability of the virtual testing scenarios, by implementing an AEB, a total crash risk reduction of 81.70% was achieved based on pre-crash simulations. It was shown that 50 in-crash simulations per load case are sufficient to create a metamodel for injury prediction. For the in-crash simulations with the generic vehicle, it was also shown that the injury risk can be reduced by implementing an AEB, as compared to the baseline scenarios. Moreover, as seen in the unavoidable cases, the injury risk for the average male and female is the same for brain injuries and femoral shaft fractures. The average male has a higher risk of skull fractures and fractures of more than three ribs compared to the average female. The average female has a higher risk of proximal femoral fractures than the average male. Conclusions: A novel methodology was developed which allows for movement away from the exclusive use of standard-load case assessments, thus helping to bridge the gap between active and passive safety evaluations.
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| 5. |
- Lindman, M., et al.
(författare)
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Cyclists interacting with passenger cars; A study of real world crashes
- 2015
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Ingår i: 2015 IRCOBI Conference Proceedings - International Research Council on the Biomechanics of Injury. ; , s. 1-12
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Konferensbidrag (refereegranskat)abstract
- A growth in the number of cyclists was observed over the past decades. At the same time, cyclists account for a large share of injured road users. Crash data analysis for safety priorities, design of safety systems and development of effectiveness assessment methods for cyclist safety should be based on relevant and representative datasets of real world crashes. This study presents descriptive statistics and cyclist injury risk estimations from Volvo Cars Cyclist Accident Database that provides up-to-date distributions of conflict situations, crash configurations as well as cyclist characteristics and driver information. The most dominant conflict situations with MAIS2+ injured cyclists were 'Straight Crossing Path' scenarios, 'Car Turning when Cyclist approaching from Opposite Direction' and 'Cyclist hit an opening car door when passing by' (dooring). The most common crash configurations were 'car front to cyclist side', 'cyclist front to car side', 'car front to cyclist front' and 'dooring' in that order. The body parts with the highest risk for serious injuries were the torso and the lower extremities followed by the head. When adding moderate injuries, the highest risk for injuries was found in the upper extremities. The results of the analysis aim at prioritize and develop active, integrated and passive safety countermeasures in car to cyclist crashes.
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| 6. |
- Patra, Anuttam, et al.
(författare)
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Design and development of novel mineral-specific collectors for flotation
- 2014
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Ingår i: 27th International Mineral Processing Congress, IMPC 2014, Santiago, Chile, 20-24 October 2014.
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Konferensbidrag (refereegranskat)abstract
- Almost all of the flotation reagents used today were discovered by continued application of empirical methods and/or trial and error experimentation. Moreover, with the metal-ion specific approach used so far, it is difficult to separate the minerals containing the same constituent metal ion. A critical assessment of molecular recognition processes involved in biomineralization suggested the possibility of using reagents which are surface specific. The concept that the molecules consisting of two or more functional groups having appropriate spacing between those so as to achieve structural/stereochemical compatibility during interaction with the mineral surface exhibit structure-specificity is thought to be extended to the design of specific collectors in flotation processes. In the present study, for the first time, a rational design of surface active molecules, and thereby the recognition of crystal faces (of minerals) by these molecules through structural and stereochemical matching is being utilized successfully to selectively float various minerals. For this purpose, carboxylate-based collectors (for mineral specific flotation of calcium minerals) as well as xanthate-based collectors (for mineral specific flotation of sulphide minerals) with a fixed alkyl chain length but having two functional groups with varying geometrical distances (separated by a spacer of one, two and three carbon atoms) between them have been synthesized. In this article, we have discussed the design, synthesis, purification of these novel mineral specific collectors as well as their important solution parameters in relation to flotation processes.
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| 7. |
- Amani, Pegah, 1983, et al.
(författare)
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Food product clustering for customized food logistics
- 2013
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Ingår i: 7th International European Forum (Igls-Forum) - (136th EAAE Seminar) on System Dynamics and Innovation in Food Networks , Innsbruck-Igls, Austria.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 8. |
- Edh Mirzaei, Nina, 1984, et al.
(författare)
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Strategic consensus on manufacturing strategy content: including the operators' perceptions
- 2016
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Ingår i: International Journal of Operations and Production Management. - : Emerald Group Publishing Limited. - 1758-6593 .- 0144-3577. ; 36:4, s. 429-466
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – Strategic consensus between operators and managers is an important means toaccomplish a successful manufacturing strategy (MS) process. Previous studies largely leftout individual operators from this concept. Therefore, the purpose of this paper was toempirically examine the level of strategic consensus on the MS within the operationsfunction, that is, the operators’ and managers’ perceptions of MS.Design/methodology/approach – Interviews were conducted with both operators andmanagers at three small and medium-sized enterprises in Sweden. The MS dimensions wereselected based on previous research; the data was analysed by using thematic coding.Findings – The study shows that the levels of strategic consensus on the MS vary amongcompanies. Even when strategic consensus exists between operators and managers, theirunderlying reasons often differ. Furthermore, the levels of strategic consensus vary amongMS dimensions. The companies’ usage of information-sharing channels, along with their sizeand position in the supply chain, can be important for the level of strategic consensus.Originality/value – This paper contributes to the body of knowledge in three ways. First, itexpands the scope of the MS dimensions under study, thus offering a stronger, resource-basedperspective on MS and strategic consensus than what earlier studies showed. Second, it goesbeyond the management level by including both managers and operators as the unit ofanalysis. Third, compared to previous research, it focuses on a new context and is based on indepthcase studies.
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| 9. |
- Edh, Nina, 1984, et al.
(författare)
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Strategic Consensus in SMEs: Behavioral Operations Perspective on Manufacturing Strategy
- 2013
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Ingår i: Proceedings for the 22nd International Conference on Production Research, Challenges for Sustainable Operations, July 28th - Aug 1, 2013, Parana, Brazil.
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Konferensbidrag (refereegranskat)abstract
- Previous manufacturing strategy (MS) studies have to a limited extent incorporated the people dimension emphasized in the behavioral operations field. This paper aims to empirically examine the relationship between managers’ and operators’ perceptions of MS from a behavioral operations perspective. Interviews with both managers and operators at three Swedish metalworking small and medium enterprises (SMEs) were conducted. The results show a higher level of strategic consensus, compared to earlier research. Strategic consensus is primarily seen within the intra-organizational dimensions. Lack of consensus seems to be caused primarily by poor communication about strategic objectives and long-term plans. By emphasizing the people dimension of MS, this paper contributes to increased knowledge about strategic consensus at SMEs and the importance of strategic commitment and strategic consensus for a successful MS process.
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| 10. |
- Edh, Nina, 1984, et al.
(författare)
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The people dimension in manufacturing strategy: contextual factors influencing a joint view
- 2014
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Ingår i: Proceedings for the 21th International Annual EurOMA Conference | Operations Management in an Innovation Economy | 20-25 June 2014, Palermo, Italy. - : International Annual EurOMA Conference.
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Konferensbidrag (refereegranskat)abstract
- This paper explicates the contextual factors influencing the workers’ perceptions of theMS, and hence, the possibilities for a joint view between workers and managers. Thepaper is based on in depth interviews with 16 workers in four metal working SMEs inSweden. The contextual factors can be viewed at two levels: individual andorganisational. This paper contributes to richer descriptions of what the individual andorganisational contextual factors incorporate, and to the clarification of the importantrole communication channels plays for the possibilities of a joint view. Thereby,contributing to increased knowledge on the manufacturing strategy formation process.
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