| 1. |
- Andersén, Jim, 1976-, et al.
(författare)
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Resource organization and firm performance : How entrepreneurial orientation and management accounting influence the profitability of growing and non-growing SMEs
- 2016
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Ingår i: International Journal of Entrepreneurial Behaviour & Research. - : Emerald Group Publishing Limited. - 1355-2554 .- 1758-6534. ; 22:4, s. 466-484
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Tidskriftsartikel (refereegranskat)abstract
- PurposeThe aim of this study is to examine how entrepreneurial orientation (EO) and the use of management accounting practices (MAPs) in decision making affects the profitability of SMEs, and also to analyze the extent to which EO and the use of MAPs affects profitability differently in growing and non-growing SMEs.Design/methodology/approachThe paper employs an empirical investigation which is based on a sample of 153 Swedish manufacturing SMEs. The data is analyzed by two- and three way interaction regressions.FindingsEO and MAPs have a positive effect on profitability in non-growing SMEs, but the combined effect of EO and MAPs has no additional effect. However, for growing SMEs, high usage of MAPs in decision making is a prerequisite for EO to influence profitability.Originality/valueThis study is the first to use the resource-based view to examine the relationship between two dimensions of resource organization and SME profitability. Entrepreneurial orientation (EO) is used as a proxy for how resources are organized in order to identify opportunities, and management accounting practices (MAPs) are used as a proxy for how efficiently resources are organized.
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| 2. |
- Andersson, Bo, et al.
(författare)
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Structure Functions and general final state properties in the linked dipole chain model
- 1996
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Ingår i: Zeitschrift für Physik C Particles and Fields. - : Springer Science and Business Media LLC. - 0170-9739 .- 1431-5858. ; 71:4, s. 613-624
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Tidskriftsartikel (refereegranskat)abstract
- We have in an earlier paper, [1], presented a generalization, the Linked Dipole Chain Model LDC, of the model developed by Ciafaloni-Catani-Fiorani-Marchesini, [2], to decribe the structure functions and the states in Deep Inelastic Scattering events. In this paper we would like to present an investigation of a set of general features of the LDC Model, viz the behaviour of the structure functions (we will show how the result interpolates in a precise way in between the well-known DGLAP and BFKL approaches), the average bremsstrahlung emission in the states and finally a partitioning of the structure functions into three different channels: the ''ordinary'' parton-probe events, where all bremsstrahlung emissions are below the probe Q(2), the boson-gluon fusion events where the last splitting of the par ton chains contain transverse momentum above Q(2), and the resolved Rutherford scattering events between the probe and the hadron (where the largest transverse momentum occur somewhere along the emission lines away from the ends).
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| 3. |
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| 4. |
- Lundin, Björn, et al.
(författare)
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Subsequent events to GTP binding by the plant PsbO protein: structural changes, GTP hydrolysis and dissociation from the photosystem II complex
- 2007
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Ingår i: Biochimica et Biophysica Acta - Bioenergetics. - Amsterdam : Elsevier BV. - 0005-2728 .- 1879-2650. ; 1767:6, s. 500-508
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Tidskriftsartikel (refereegranskat)abstract
- Besides an essential role in optimizing water oxidation in photosystem II (PSII), it has been reported that the spinach PsbO protein binds GTP [C. Spetea, T. Hundal, B. Lundin, M. Heddad, I. Adamska, B. Andersson, Proc. Natl. Acad. Sci. U.S.A. 101 (2004) 1409–1414]. Here we predict four GTP-binding domains in the structure of spinach PsbO, all localized in the β-barrel domain of the protein, as judged from comparison with the 3D-structure of the cyanobacterial counterpart. These domains are not conserved in the sequences of the cyanobacterial or green algae PsbO proteins. MgGTP induces specific changes in the structure of the PsbO protein in solution, as detected by circular dichroism and intrinsic fluorescence spectroscopy. Spinach PsbO has a low intrinsic GTPase activity, which is enhanced fifteen-fold when the protein is associated with the PSII complex in its dimeric form. GTP stimulates the dissociation of PsbO from PSII under light conditions known to also release Mn2+ and Ca2+ ions from the oxygen-evolving complex and to induce degradation of the PSII reaction centre D1 protein. We propose the occurrence in higher plants of a PsbO-mediated GTPase activity associated with PSII, which has consequences for the function of the oxygen-evolving complex and D1 protein turnover.
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| 5. |
- Rögnvaldsson, Thorsteinn, 1963-, et al.
(författare)
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Improved protein identification in mammalian cells using a new automatic peak detection algorithm
- 2002
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Ingår i: Proceedings - 50th ASMS Conference on Mass Spectrometry and Allied Topics. - Santa Fe : ASMS. ; , s. 785-786
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Konferensbidrag (refereegranskat)abstract
- A comparison of two automatic peak detection algorithms is presented. One algorithm comes with the Voyager 5 Data ExplorerTM program, the other is a new algorithm called Pepex® (short for PEptide Peak Extractor) from BioBridge Computing. The peak sets selected with both tools have been compared, against each other and against manual peak selections, on a large set of mass spectra obtained after tryptic in gel digestion of 2D-gel samples from human fetal fibroblasts. It is shown how much variation there is in peak sets, both when selected by human operators and when selected by automatic peak detection algorithms. This variation has been used as an advantage to gain significantly better protein identification results, using the Pepex tool, than what an experienced mass spectroscopist has achieved on the same data. The strongest improvement has been observed in weak spectra, where the signal peak intensities are low.
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| 6. |
- Rögnvaldsson, Thorsteinn, et al.
(författare)
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Improving automatic peptide mass fingerprint protein identification by combining many peak sets
- 2004
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Ingår i: Journal of chromatography. B. - : Elsevier. - 1570-0232 .- 1873-376X. ; 807:2, s. 209-215
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Tidskriftsartikel (refereegranskat)abstract
- An automated peak picking strategy is presented where several peak sets with different signal-to-noise levels are combined to form a more reliable statement on the protein identity. The strategy is compared against both manual peak picking and industry standard automated peak picking on a set of mass spectra obtained after tryptic in gel digestion of 2D-gel samples from human fetal fibroblasts. The set of spectra contain samples ranging from strong to weak spectra, and the proposed multiple-scale method is shown to be much better on weak spectra than the industry standard method and a human operator, and equal in performance to these on strong and medium strong spectra. It is also demonstrated that peak sets selected by a human operator display a considerable variability and that it is impossible to speak of a single “true” peak set for a given spectrum. The described multiple-scale strategy both avoids time-consuming parameter tuning and exceeds the human operator in protein identification efficiency. The strategy therefore promises reliable automated user-independent protein identification using peptide mass fingerprints.
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| 7. |
- Samuelsson, Joachim, et al.
(författare)
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Formal accounting planning in SMEs : the influence of family ownership and entrepreneurial orientation
- 2016
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Ingår i: Journal of Small Business and Enterprise Development. - : Emerald Group Publishing Limited. - 1462-6004 .- 1758-7840. ; 23:3, s. 691-702
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Tidskriftsartikel (refereegranskat)abstract
- PurposeSeveral studies have highlighted the importance of management accounting practices such as formal short-term planning and formal long-term planning for SME performance. However, few studies have considered what actually explains differences in the use of formal planning (from a management accounting approach) in SMEs. Family ownership and EO are two plausible explanations for such differences. The aim of this study is therefore to examine how family ownership and EO are correlated to the use of formal short-term planning and formal long-term planning in SMEs.Design/methodology/approachIn this study, we examined how family ownership and entrepreneurial orientation affect the use of formal planning by analyzing a sample of 156 Swedish manufacturing SMEs, using multivariate regression analysis.FindingsAs could be expected, we were able to validate the notion that family firms use less formal planning than non-family firms. However, in contrast to some previous studies, we found that there is a strongly positive relationship between entrepreneurial orientation and the use of formal short-term planning and long-term planning.Originality/valueWhereas many previous studies on family business have assumed that family firms use less formal planning than non-family firms, the present study is one of few to actually confirm this notion. Also, this study has provided strong evidence that EO is positively correlated to the use of formal planning, in the short term and in the longer term.
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| 8. |
- Samuelsson, Jim, et al.
(författare)
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Modular, scriptable and automated analysis tools for high-throughput peptide mass fingerprinting
- 2004
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Ingår i: Bioinformatics. - Oxford : Oxford University Press. - 1367-4803 .- 1367-4811. ; 20:18, s. 3628-3635
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Tidskriftsartikel (refereegranskat)abstract
- A set of new algorithms and software tools for automatic protein identification using peptide mass fingerprinting is presented. The software is automatic, fast and modular to suit different laboratory needs, and it can be operated either via a Java user interface or called from within scripts. The software modules do peak extraction, peak filtering and protein database matching, and communicate via XML. Individual modules can therefore easily be replaced with other software if desired, and all intermediate results are available to the user. The algorithms are designed to operate without human intervention and contain several novel approaches. The performance and capabilities of the software is illustrated on spectra from different mass spectrometer manufacturers, and the factors influencing successful identification are discussed and quantified.
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| 9. |
- Samuelsson, Jim, et al.
(författare)
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PIUMS® - A new algorithm for protein identification using peptide fingerprints
- 2002
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Ingår i: Proceedings. - Santa Fe : ASMS. ; , s. 783-784
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Konferensbidrag (refereegranskat)abstract
- Piums®, a new protein identification tool for peptide fingerprints, is presented. Piums includes both a peak extraction tool (Pepex®) and a new protein scoring algorithm (Piped®). The basic ideas underlying the scoring algorithm are presented and it is demonstrated on some real sample spectra. It is shown, using simulated peak lists, how the scoring performance varies with contamination levels and protein sequence coverage, and that there is a boundary for when scoring is possible. Piums is fully scriptable and modularised. Each individual module can be used by itself, with input and output in XML format, to e.g. include it in an analysis chain. Piums is benchmarked against the Mascot software from Matrix Science LLC, The results indicate that Piums is more precise than the Mascot score, and about 5-10% more efficient than Mascot for real peak lists, for the same level of false positives.
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