| 1. |
- Fasth Berglund, Åsa, 1978, et al.
(författare)
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CREATING STRATEGIES FOR GLOBAL ASSEMBLY INSTRUCTIONS – CURRENT STATE ANALYSIS
- 2014
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Ingår i: The sixth Swedish Production Symposium. - 9789198097412
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Konferensbidrag (refereegranskat)abstract
- This paper present result from three global companies regarding strategies for creating global instructions, the studies are from a current state perspective. The result is based from a survey with 65 respondents. The designers are responsible for instructions and are from two different areas; assembly and service market. Furthermore a workshop has been arranged were two of three companies participated. Three main issues towards formulating a strategy will be discussed; (1) Information carrier; the results reveal that the most common information carrier for instructions are, Paper, Personal meetings and Desktops. (2) Who is responsible for quality assurance, most answers were production engineers. (3) Are there any standards concerning instruction at your company today? The respondents answered yes or under development in over 80 % of the cases on the question; if it exist any standards today.
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| 2. |
- Albin, Maria, et al.
(författare)
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0253 Hairdressers are occupationally exposed to ortho- and meta- toluidine
- 2014
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Ingår i: Occupational and Environmental Medicine. - : BMJ. - 1470-7926 .- 1351-0711. ; 71 Suppl 1, s. 32-33
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Konferensbidrag (refereegranskat)abstract
- Hairdressing work is classified as carcinogenic based on excess risk for bladder cancer. We aimed at evaluating if current hairdressers are exposed to established/suspected bladder carcinogens (aromatic amines) and indicate possible sources of exposure.
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| 3. |
- Fang, Yeyu, 1984-
(författare)
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Titled and graded anisotropy FePt and FePtCu thin films for the application of hard disk drive and spin torque oscillators
- 2011
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The FePt and FePtCu thin films with graded anisotropy and titled anisotropy are utilized to solve both the magnetic recording ‘‘trilemma’’ of the hard disk drives (HDDs) and the large field operation problem of spin torque oscillators (STOs). We have successfully realized the FePtCu thin films with graded anisotropy. During deposition a compositional gradient is achieved by continuously varying the Cu content from the top to bottom. After annealing at proper temperatures, the top Cu-poor regions remain at soft A1 phase, while the bottom Cu-rich regions transform into hard L1 0phase. Hence the gradient anisotropy is established through the film thickness. The critical role of the annealing temperatures (TA) on the resultant anisotropy gradient is investigated. Magnetic measurements support the creation of an anisotropy gradient in properly annealed films which exhibit both the reduced coercivity and moderate thermal stability. In conjunction of the fabrication, the subsequent analysis of the graded material is not trivial. The reversal mechanism of graded anisotropy have been investigated by alternation gradient magnetometer (AGM) and magneto optical Kerr effect (MOKE) measurements with first order reversal curves (FORC) technique. The AGM-FORC analysis, which clearly shows the soft and hard phases, is not able to resolve how these phases are distributed through the film thickness. MOKE-FORC measurement which preferentially probes the surface of the film, reveal that the soft components are indeed located toward the top surface. The TA plays a critical role in the induced anisotropy gradient. We provide a detailed study of the how the anisotropy gradient in a compositional graded FePtCu film gradually develops as a function of the TA. By utilizing the in-situ annealing and magnetic characterization capability of a physical property measurement system, the evolution of the induced anisotropy gradient is elucidated. These results are important and useful for the application of HDDs. In order to achieve the zero-field operation for STOs, we have successfully fabricated pseudo spinvalves based on L1 0(111) textured FePt or FePtCu. We demonstrate magnetoresistance(MR) in excess of 4% in FePt/CoFe/Cu/CoFe/NiFe pseudo spin valves based on L10(111)-oriented FePt fixed layers with a 36 ° out-of-plane tilted magnetization. The high MR is achieved by increasing the spin polarization at the Cu interfaces, using thin CoFe, and optimizing the FePt growth and Cu interface quality using Ta and Ta/Pt underlayers.We observe well-separated switching of the FePt/CoFe fixed layer and the CoFe/NiFe free layer, suggesting that CoFe is rigidly exchange coupled to FePt and NiFe in the respective layers. Futuremore, through optimization of the Cu spacer thickness, we demonstrate MR up to 5% in FePtCu/CoFe/Cu/CoFe/NiFe pseudo spin valves based on L10 (111) FePtCu fixed layers with a tilted magnetization. We find an optimum spacer thickness of about 2.4 nm which correlates with a clear onset of strong interlayer exchange coupling below 2.4 nm and spin-independent current shunting in the spacer above 2.4 nm. These results are an important milestone for future applications of tilted spin polarizers in STOs.
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| 4. |
- Larsson, Anna, et al.
(författare)
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The Global Arms Trade Network 1950-2007
- 2010
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We study the evolution of the global arms trade network using a unique dataset on all international transfers of major conventional weapons over the period 1950-2007. First, we provide a careful description of the characteristics of global arms trade using tools from social network analysis. Second, we relate our .ndings to political regimes by studying whether di¤erences in polity scores a¤ect the likelihood of arms trade by estimating an augmented gravity equation. Our .ndings from the network analysis are much in line with common views of the Cold War. We see a clear division between the Warsaw Pact and NATO, with the Soviet Union being more central to the former than the United States to the latter. We .nd that di¤erences in polity has a signi.cant, negative e¤ect on the likelihood of arms trade between two countries. The relationship is remarkably robust throughout the sample period and does not hold for trade in any other good that we investigate. The result suggests that democracies are indeed more likely to trade arms with other democracies than with autocracies since the former are not perceived as potential adversaries. We view this .nding as evidence in favour of the Democratic Peace Theory.
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| 5. |
- Miliutenko, Sofiia, 1984-, et al.
(författare)
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Energy Use and Greenhouse Gas Emissions during the Life Cycle Stages of a Road Tunnel : the Swedish Case Norra Länken
- 2012
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Ingår i: European Journal of Transport and Infrastructure Research. - : Delft University of Technology. - 1567-7133 .- 1567-7141. ; 12:1, s. 39-62
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Tidskriftsartikel (refereegranskat)abstract
- Inclusion of Life Cycle Assessment during the planning of transport infrastructure is rarely used in practice, but is becoming a widely discussed issue nowadays. This study sought to improve understanding of the life cycle energy use and greenhouse gas emissions of transport infrastructure, using the example of a road tunnel. Two levels of analysis were used: 1) detailed data inventory for the construction of rock tunnels; and 2) screening assessment for the life cycle phases of the whole tunnel infrastructure (including its main parts: concrete and rock tunnels). The first level of analysis showed that production of materials (i.e. concrete and asphalt) made the largest contribution to Cumulative Energy Demand and Global Warming Potential. The second level of analysis indicated that concrete tunnels had much higher Cumulative Energy Demand and Global Warming Potential per lane-metre than rock tunnels. Moreover, the operational phase of the tunnel was found to have the highest share of energy use and greenhouse gas emissions throughout the tunnel’s life cycle.
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| 6. |
- Orellana Coca Åkerman, Cecilia, et al.
(författare)
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Biolubricant synthesis using immobilised lipase: Process optimisation of trimethylolpropane oleate production
- 2011
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Ingår i: Process Biochemistry. - : Elsevier BV. - 1873-3298 .- 1359-5113. ; 46:12, s. 2225-2231
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Tidskriftsartikel (refereegranskat)abstract
- Synthetic esters based on polyols and fatty acids possess suitable technical and ecological properties for applications as biolubricants, and can replace the mineral oil based lubricants in several applications. In this work, the synthesis of trimethylolpropane (TMP) esters with oleic acid using immobilised lipase B from Candida antarctica (Novozym (R) 435) has been studied. TMP-trioleate has suitable properties for use as hydraulic fluids, especially at extreme temperatures. The effect of different reaction parameters on the reaction efficiency has been evaluated. The study showed that the formation of the triester product was facilitated at high temperature and biocatalyst concentration, as well as stoichiometric amounts of oleic acid and TMP. The product with the highest triester content exhibited the lowest pour point (-42 degrees C). The stability of the biocatalyst was however limited at high temperature and polyol concentration. Loss of activity during recycling of the biocatalyst at 70 degrees C was reduced to some extent by washing it with 2-propanol prior to subsequent run. (C) 2011 Elsevier Ltd. All rights reserved.
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| 7. |
- Åkerman, Anders, et al.
(författare)
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The global arms trade network 1950-2007
- 2014
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Ingår i: Journal of comparative economics (Print). - : Elsevier BV. - 0147-5967 .- 1095-7227. ; 42:3, s. 535-551
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Tidskriftsartikel (refereegranskat)abstract
- Using SIPRI data on all international transfers of major conventional weapons 1950-2007, we study the relationship between differences in polity and arms trade. To study whether states tend to trade arms within their political vicinity we estimate gravity models of the likelihood of trade at the bilateral level and study the evolution of the global network over time. We find a stable negative relationship between differences in polity and the likelihood of arms trade for the duration of the Cold War, but not in recent years. In line with these results, the global arms trade network changes drastically over the sample period in several respects: it grows more dense, clustered and decentralized over time. The differences between the NATO and Warsaw Pact sub-networks that we find corroborate the common perception that the Warsaw Pact was more strongly centralized around the USSR than NATO around the UK, the US and France.
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| 8. |
- Åkerman, Sigvard, et al.
(författare)
-
Munhålan
- 2012
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Ingår i: Kliniska färdigheter. - : Studentlitteratur AB. - 9789144075914 ; , s. 131-145
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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