| 1. |
- Andersson, Roland, et al.
(författare)
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Financing roads and railways with decentralized real estate taxes : The case of Sweden
- 2012
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Ingår i: The annals of regional science. - : Springer Science and Business Media LLC. - 0570-1864 .- 1432-0592. ; 48:3, s. 839-853
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Tidskriftsartikel (refereegranskat)abstract
- Roads and railways in Sweden are mainly financed with national government taxes. However, the regional distribution of benefits differs widely from that of tax payments. As a consequence, overspending is likely to occur. A condition for efficiency is that the collective of users should pay for such projects. Therefore, we propose a new regional order for financing projects: government expenditures for transportation projects should be transferred to regions as well as the real estate tax to finance them. We present estimates of the size of such expenditures and of the income from real estate taxes following decentralization to regions.
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| 2. |
- Bengtsson, Lars, et al.
(författare)
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Open to a Select Few? Matching Partners and Knowledge Content for Open Innovation Performance
- 2015
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Ingår i: Creativity and Innovation Management. - : John Wiley & Sons. - 0963-1690 .- 1467-8691. ; 24:1, s. 72-86
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of the paper is to illuminate the costs and benefits of crossing firm boundaries in inbound open innovation (OI) by determining the relationships among partner types, knowledge content and performance. The empirical part of the study is based on a survey of OI collaborations answered by R&D managers in 415 Italian, Finnish and Swedish firms. The results show that the depth of collaboration with different partners (academic/consultants, value chain partners, competitors and firms in other industries) is positively related to innovation performance, whereas the number of different partners and size have negative effects. The main result is that the knowledge content of the collaboration moderates the performance outcomes and the negative impact of having too many different kinds of partners. This illustrates how successful firms use selective collaboration strategies characterized by linking explorative and exploitative knowledge content to specific partners, to leverage the benefits and limit the costs of knowledge boundary crossing processes.
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| 3. |
- Elgammal, Karim, et al.
(författare)
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Density functional calculations of graphene-based humidity and carbon dioxide sensors : effect of silica and sapphire substrates
- 2017
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Ingår i: Surface Science. - : Elsevier. - 0039-6028 .- 1879-2758. ; 663, s. 23-30
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Tidskriftsartikel (refereegranskat)abstract
- We present dispersion-corrected density functional calculations of water and carbon dioxide molecules adsorption on graphene residing on silica and sapphire substrates. The equilibrium positions and bonding distances for the molecules are determined. Water is found to prefer the hollow site in the center of the graphene hexagon, whereas carbon dioxide prefers sites bridging carbon-carbon bonds as well as sites directly on top of carbon atoms. The energy differences between different sites are however minute - typically just a few tenths of a millielectronvolt. Overall, the molecule-graphene bonding distances are found to be in the range 3.1-3.3 (A) over circle. The carbon dioxide binding energy to graphene is found to be almost twice that of the water binding energy (around 0.17 eV compared to around 0.09 eV). The present results compare well with previous calculations, where available. Using charge density differences, we also qualitatively illustrate the effect of the different substrates and molecules on the electronic structure of the graphene sheet.
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| 4. |
- Halling, Bengt, et al.
(författare)
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Sense of Coherence and Lean-based leadership and alterations in sick leave and productivity at a steel wire manufacturing unit
- 2021
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Ingår i: Work. - : IOS Press. - 1051-9815 .- 1875-9270. ; 68:4, s. 1211-1220
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Managers have an important role in the creation of workplace conditions that prevent sick leave and lead to high performance. In Lean, the assumption is that people are the source for continuous improvements. There is a need for more knowledge about what kind of leadership can help managers in a Lean context to create workplace conditions for less sick leave and higher performance. OBJECTIVE: The purpose of this study was to examine how productivity and rate of sick leave changed at a stainless wire manufacturing unit after implementing a new leadership approach based on Sense of Coherence theory (SOC) and Lean philosophy. METHODS: In this case study, interventions coupled with productivity, quality and sick leave evaluations through the company's key performance indicators were performed. The follow-up was also based on narrative descriptions from the management team in the course of four meetings during the intervention. Notes were taken and analyzed regarding perceived outcomes of the intervention. RESULTS: The results showed that leadership based on SOC and Lean philosophy is positively correlated with productivity per worker, as was the amount of yearly production that met the quality specifications. The amount of sick leave decreased during the period of the intervention compared to before the intervention. CONCLUSIONS: Changes in management contribute to productivity. Combining Lean tools and Lean philosophy with the Sense of Coherence theory (SOC) as a base for leadership can influence productivity and decrease the rate of sick leave.
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| 5. |
- Hugosson, Håkan Wilhelm, et al.
(författare)
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Sulfur- and Oxygen-Induced Alterations of the Iron (001) Surface Magnetism and Work Function : A Theoretical Study
- 2013
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Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 117:12, s. 6161-6171
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Tidskriftsartikel (refereegranskat)abstract
- The electronic structure and magnetic properties of atomic sulfur and oxygen adsorbed on the iron (001) surface are examined using density functional theory (DFT). The sulfur/oxygen coverage is considered from a quarter of one monolayer (ML) to a full monolayer. The work function change, magnetic properties, and density of states are determined and compared. We find that the work function increases with sulfur coverage in agreement with experiment. We also find that sulfur interacts strongly with the surface layer and that the magnetic moment of the Fe surface decreases as the sulfur coverage increases. In the case of oxygen adsorption, we find that the magnetic moment of the surface Fe atoms instead increases. We show that the difference in surface magnetic moment between sulfur adsorption and oxygen adsorption can be simply explained combining the Slater-Pauling rigid band model linking d-occupation and magnetic moment with an electronegativity argument. Moreover, the work function of the Fe surface as a function of oxygen coverage is found to be very sensitive to overlayer arrangement, here seen in the cases of 0.5 ML c(2 x 2) and 0.5 ML p(2 x 1). This is shown to result from large differences in the surface dipole moment change induced by the oxygen adsorption in the two different overlayer arrangements.
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| 6. |
- Hugosson, Håkan Wilhelm, et al.
(författare)
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Surface energies and work functions of the transition metal carbides
- 2004
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Ingår i: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 557:03-jan, s. 243-254
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Tidskriftsartikel (refereegranskat)abstract
- We have performed an ab initio study of the surface energies, surface electronic structures and work functions for the (10 0) surface of the, existent and hypothetical, cubic 3d (Sc-Cu), 4d (Zr-Ag) and 5d (La-Au) transition metal carbides. The calculated surface energies have been compared to predictions using a so-called bond-cutting model and a model based on the so-called bonding energies. The absolute values and rough trends of the surface energies are fairly well predicted within the simple bond-cutting model, as compared to fully self-consistent calculations, while both trends and absolute values are well reproduced within the bonding energy model. The electronic structure (densities of states) of the transition metal carbides at the surface and in the bulk have been calculated. The trends are discussed in relation to the behavior of the surface energy and the work function across the series.
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| 7. |
- Hugosson, Håkan Wilhelm, et al.
(författare)
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Surface segregation of transition metal impurities on the TiC(100) surface
- 2005
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Ingår i: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 585:02-jan, s. 101-107
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Tidskriftsartikel (refereegranskat)abstract
- The segregation energies of 3d (Sc-Cu), 4d (Y-Ag) and 5d (La-Au) transition metal impurities on the (10 0) surface of TiC have been obtained using first-principles electronic structure calculations. The results are in agreement with available experimental data and show that the difference in atomic size between the impurity and host species, as well as the difference in surface energies determines if the impurity will segregate towards the surface or not. The results indicate that the difference in size is the dominant factor for the trends in segregation of transition metal impurities towards the (100) surface of TiC.
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| 8. |
- Jackson, Jennie A., et al.
(författare)
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Is what you see what you get? : Standard inclinometry of set upper arm elevation angles
- 2015
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Ingår i: Applied Ergonomics. - : Elsevier BV. - 0003-6870 .- 1872-9126. ; 47, s. 242-252
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Tidskriftsartikel (refereegranskat)abstract
- Previous research suggests inclinometers (INC) underestimate upper arm elevation. This study was designed to quantify possible bias in occupationally relevant postures, and test whether INC performance could be improved using calibration. Participants were meticulously positioned in set arm flexion and abduction angles between 0 degrees and 150 degrees. Different subject-specific and group-level regression models comprising linear and quadratic components describing the relationship between set and INC-registered elevation were developed using subsets of data, and validated using additional data. INC measured arm elevation showed a downward bias, particularly above 600. INC data adjusted using the regression models were superior to unadjusted data; a subject-specific, two-point calibration based on measurements at 0 and 900 gave results closest to the 'true' set angles. Thus, inclinometer measured arm elevation data required calibration to arrive at 'true' elevation angles. Calibration to a common measurement scale should be considered when comparing arm elevation data collected using different methods.
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| 9. |
- Laukka, Petri, et al.
(författare)
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Expression of affect in spontaneous speech : Acoustic correlates and automatic detection of irritation and resignation
- 2011
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Ingår i: Computer speech & language (Print). - : Elsevier. - 0885-2308 .- 1095-8363. ; 25:1, s. 84-104
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Tidskriftsartikel (refereegranskat)abstract
- The majority of previous studies on vocal expression have been conducted on posed expressions. In contrast, we utilized a large corpus of authentic affective speech recorded from real-life voice controlled telephone services. Listeners rated a selection of 200 utterances from this corpus with regard to level of perceived irritation, resignation, neutrality, and emotion intensity. The selected utterances came from 64 different speakers who each provided both neutral and affective stimuli. All utterances were further automatically analyzed regarding a comprehensive set of acoustic measures related to F0, intensity, formants, voice source, and temporal characteristics of speech. Results first showed that several significant acoustic differences were found between utterances classified as neutral and utterances classified as irritated or resigned using a within-persons design. Second, listeners’ ratings on each scale were associated with several acoustic measures. In general the acoustic correlates of irritation, resignation, and emotion intensity were similar to previous findings obtained with posed expressions, though the effect sizes were smaller for the authentic expressions. Third, automatic classification (using LDA classifiers both with and without speaker adaptation) of irritation, resignation, and neutral performed at a level comparable to human performance, though human listeners and machines did not necessarily classify individual utterances similarly. Fourth, clearly perceived exemplars of irritation and resignation were rare in our corpus. These findings were discussed in relation to future research.
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| 10. |
- Lindahl, Lars, et al.
(författare)
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Normative positions within an algebraic approach to normative systems
- 2004
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Ingår i: Journal of Applied Logic. - : Elsevier BV. - 1570-8683 .- 1570-8691. ; 2:1, s. 63-91
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Tidskriftsartikel (refereegranskat)abstract
- The formal analysis of normative systems as initiated by Alchourrón and Bulygin can be complemented by the analysis of normative positions as pursued by Kanger, Lindahl, Sergot and Jones. The paper is a step towards integrating the two approaches within an algebraic theory of so-called Boolean quasi-orderings (Bqo's). In the general Bqo theory presented, a number of theoretical tools are introduced and elucidated by theorems, in particular those of fragment, connection, coupling and pair coupling. Condition implication structures (cis's) are models of the Bqo theory used for the representation of normative systems. A system of normative positions is introduced as a special kind of cis. The final section is devoted to an example exhibiting a legal mini-system where a cis of normative positions (np-cis) is joined to a descriptive cis.
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