| 1. |
- Algesten, Grete, et al.
(författare)
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Organic carbon budget for the Gulf of Bothnia
- 2006
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Ingår i: Journal of Marine Systems. - : Elsevier BV. - 0924-7963 .- 1879-1573. ; 63:3-4, s. 155-161
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Tidskriftsartikel (refereegranskat)abstract
- We calculated input of organic carbon to the unproductive, brackish water basin of the Gulf of Bothnia from rivers, point sources and the atmosphere. We also calculated the net exchange of organic carbon between the Gulf of Bothnia and the adjacent marine system, the Baltic Proper. We compared the input with sinks for organic carbon; permanent incorporation in sediments and mineralization and subsequent evasion of CO2 to the atmosphere. The major fluxes were riverine input (1500 Gg C year(-1)), exchange with the Baltic Proper (depending on which of several possible DOC concentration differences between the basins that was used in the calculation, the flux varied between an outflow of 466 and an input of 950 Gg C year(-1)), sediment burial (1100 Gg C year) and evasion to the atmosphere (3610 Gg C year(-1)). The largest single net flux was the emission of CO2 to the atmosphere, mainly caused by bacterial mineralization of organic carbon. Input and output did not match in our budget which we ascribe uncertainties in the calculation of the exchange of organic carbon between the Gulf of Bothnia and the Baltic Proper, and the fact that CO2 emission, which in our calculation represented 1 year (2002) may have been overestimated in comparison with long-term means. We conclude that net heterotrophy of the Gulf of Bothnia was due to input of organic carbon from both the catchment and from the Baltic Proper and that the future degree of net heterotrophy will be sensible to both catchment export of organic carbon and to the ongoing eutrophication of the Baltic Proper.
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| 2. |
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| 3. |
- Brännström, Mattias, et al.
(författare)
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Rear end collision mitigation system for an automotive vehicle : patent pending
- 2006
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Patent (populärvet., debatt m.m.)abstract
- The present invention relates to a system (1) and method for autonomous rear impact mitigation in a host vehicle (2) having a brake system (4) and a steering system (5). The relative motion parameters between the host vehicle (2) and a second vehicle (11) behind the host vehicle (2) are established. While the host vehicle (2) has a positive velocity, the brake system (4) of the host vehicle (2) is selectively activated based on the determined relative motion parameters.
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| 4. |
- Bylesjö, Max, et al.
(författare)
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MASQOT-GUI : spot quality assessment for the two-channel microarray platform
- 2006
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Ingår i: Bioinformatics. - : Oxford University Press (OUP). - 1367-4803 .- 1367-4811. ; 22:20, s. 2554-2555
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Tidskriftsartikel (refereegranskat)abstract
- MASQOT-GUI provides an open-source, platform-independent software pipeline for two-channel microarray spot quality control. This includes gridding, segmentation, quantification, quality assessment and data visualization. It hosts a set of independent applications, with interactions between the tools as well as import and export support for external software. The implementation of automated multivariate quality control assessment, which is a unique feature of MASQOT-GUI, is based on the previously documented and evaluated MASQOT methodology. Further abilities of the application are outlined and illustrated. AVAILABILITY: MASQOT-GUI is Java-based and licensed under the GNU LGPL. Source code and installation files are available for download at http://masqot-gui.sourceforge.net/
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| 5. |
- Dvinskikh, Sergey V., et al.
(författare)
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Mesomorphism in columnar phases studied by solid-state nuclear magnetic resonance
- 2006
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Ingår i: Physical Review E. - : American Physical Society. - 1539-3755. ; 74:2, s. 021703-
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we present C-13 and H-1 NMR investigations of 2, 3, 6, 7, 10, 11-hexahexyl-thiotriphenylene (HHTT). The measurements were carried out under both static and magic-angle spinning conditions. The phase diagram of HHTT is K <-> H <-> D-hd <-> I, where H is a helical phase and D-hd is a columnar liquid crystal. The motivation was to characterize the molecular order and dynamics and to investigate differences at the molecular level between the two mesophases: H and D-hd. It is shown that D-hd is a conventional columnar liquid crystal, where the molecular core undergoes fast rotation about the symmetry axis. The orientational order in this mesophase is lower and the temperature dependence of the order parameter is steeper than in other triphenylene-based compounds. On the other hand, in the helical phase the core, similarly to the solid phase, is essentially rigid. The difference between the solid and helical phases is mainly manifested in an increased mobility of the aliphatic chains observed in the latter phase. In addition, the sample exhibits thermal history effects, which are observed in the different behavior upon cooling and heating.
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| 6. |
- Fridell, Mats, et al.
(författare)
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15-årsuppföljning av drogberoende personer.
- 2006
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Ingår i: Vad vet vi om narkotikaanvändarna i Sverige? Mobilisering mot narkotika: rapport. - : Vad vet vi om narkotikaanvändarna i Sverige? Mobilisering mot narkotika: rapport Mobilisering mot narkotika. ; 14, s. 14-21
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- En representativ sample drogberoende patienter på sjukhus 1988 - 89 (n=125) följdes upp vid 5 år och vid 15 år. Kliniska ata och utfallsdata registrerades vid indevårdtillfället och vid uppföljningarna med en semistrukturerad intervju omfattande demografiska karakteristika, kliniska diagnoser kompletterade med kliniska test och skattningsskalor. Registerdata används för validering och jämförelse. Säkre utfallsdata vid 5 år finns registrerade för 112 personer av hela samplet (90 %) och för 110 (88 %) vid 15 år.
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| 7. |
- Jansson, Johan, 1978
(författare)
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Automated Computational Modeling
- 2006
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is part of the FEniCS project of Automation of Computational Mathematical Modeling (ACMM) as the modern manifestation of the basic principle of science:formulating mathematical equations (modeling) and solving equations (computation). The vision of FEniCS is to set a new standard towards the goals of generality, efficiency, and simplicity, concerning mathematical methodology, implementation, and application.ACMM includes the key steps of Automation of (a) discretization of differential equations,(b) solution of discrete systems, (c) error control of discrete solutions, (d) optimizationand (e) modeling. FEniCS is based on adaptive finite element methods (FEM) [1]. This thesis presents the following examples of Automated Computational Modeling asconcrete realizations of ACMM with main focus on (a)-(c): MG: Multi-adaptive Galerkin ODE-solver: This part concerns the automation of (a1) discretization in time by the MG implementation of the multi-adaptive ODE-solver mcG(q)/mdG(q) formulated in the thesis ([9]) by Anders Logg, based on Galerkin's method with continuous/discontinuous piecewise polynomial approximation in time of degree q with different time steps for different components, automati- cally determined by a posteriori error estimation. MG realizes automation of (a1) by Galerkin's method, (b) by fixed-point or Newton's method, and (c) by a posteriori error estimation using duality. MG is the first general multi-adaptive ODE-solver with automatic error control based on duality. MG has potentially a very vast range of applicability. MG may also be run in mono-adaptive form with the same time step for all components, eliminating the over-head required for multi-adaptivity. For bench-mark problems with different time scales, we demonstrate substantial performance gains with MG, as compared to mono-adaptive solvers. MG is joint work with Anders Logg. Ko: Solid mechanics solver: This part includes the automation of (a2) discretization in space of a general continuum model for solid mechanics with elasto-visco-plastic materials and large displacements, rotations and deformations. When coupled with MG for time-discretization this gives the solid mechanics solver Ko realizing (a) and (b) with (c) in progress. Ko is based on an updated Lagrangian formulation where equilibrium and constitutive equations are expressed on the current deformed configuration. Ko is the first automated solid mechanics solver and the range of possible applications is very large. We show that the performance of Ko is comparable to that of a mass-spring solver, which is the industry standard for performance-intensive solid mechanics simulations [8]. Ko demonstrates the general capability and potential of FEniCS. DOLFIN as a PSE: We present the FEniCS tool chain, and in particular DOLFIN, as a general and automated problem solving environment (PSE). DOLFIN realizes the overall concept of automated computational modeling by taking a PDE in mathematical notation as input and automatically discretizing and computing the solution by the FEM with full efficiency, including automated time discretization of time dependent PDE with the ODE solver. This is joint work with Johan Hoffman, Anders Logg and Garth Wells. Automated Modeling: We present a case study of automated modeling (e) in a model problem with a fast and a slow time scale. By resolving the fast time scale for a short period of time an effective coefficient is determined by optimization, which allows simulation of the slow time scale over long time. This is joint work with Claes Johnson and Anders Logg.
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| 8. |
- Jansson, Johan, 1973-, et al.
(författare)
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What does Corporate Citizenship have to do with the consumer? : Views on taking responsibility for a sustainable future
- 2006
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Ingår i: In Proceedings of the Nordic Academy of Management Conference.
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Konferensbidrag (refereegranskat)abstract
- This paper addresses the concept of corporate citizenship (CC) which has gained increasing attention both in society in general and in academic circles. Based on a review of the concepts of corporate social responsibility, stakeholder view of the firm and CC we argue that the debate on CC has been developed in a promising way the last few years. Although the extended view of CC, which views corporations as administering citizenship rights, is a theoretical advancement there is also an apparent lack of focus on private or individual citizens in order to understand responsibility-taking in society overall. We address this problem by introducing the notion of political consumerism and citizen consumer into the CC conceptualization. By analyzing the responsibilities of both corporations and citizens the possibility of achieving a sustainable future is increased. From this line of arguing we develop a conceptual model, called the CC-matrix, in which we describe the consumer inclusion into the academic CC debate. Thereafter we discuss a case (the Black Spot sneakers) in relation to this model and present some ideas for future research into corporate and consumer responsibilities for a sustainable future.
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| 9. |
- Jansson, Linda, et al.
(författare)
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Region Specific Hypothalamic Neuronal Activation and Endothelial Cell Proliferation in Response to Electroconvulsive Seizures.
- 2006
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Ingår i: Biological Psychiatry. - : Elsevier BV. - 0006-3223. ; 60:8, s. 874-881
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Tidskriftsartikel (refereegranskat)abstract
- Background: Major depression is often associated with disturbances in basal biological functions regulated by the hypothalamus. Electroconvulsive therapy (ECT), an efficient anti-depressant treatment. alters the activity of hypothalamic neurons. We have previously shown an increased proliferation of endothelial cells in specific areas of the rat hippocampus in response to electroconvulsive seizure (ECS) treatment, an animal model for ECT. Here we examine the effect of ECS treatment on neuronal activation and endothelial cell proliferation in mid-hypothalamus. Methods. Rats received one daily ECS treatment for 5 days and cell proliferation was detected by bromodeoxyuridine (BrdU). The number of cells double-labeled for BrdU and the endothelial cell marker rat endothelial cell antigen-1 was determined. Neuronal activation in response to acute ECS treatment was detected as c-Fos immunoreactivity in an additional experiment. Results: We demonstrate a correlating pattern of increases in neuronal activation and increased endothelial cell proliferation in the paraventricular nucleus, the supraoptic nucleus, and the ventromedial nucleus of the hypothalamus after ECS treatment. Conclusions: Hypothalamic areas with the largest increase in neuronal activation after ECS treatment exhibit increased endothelial cell proliferation. We suggest that similar angiogenic responses to ECT might counteract hypothalamic dysfunction in depressive disorder.
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| 10. |
- Jansson, Patrik, 1972, et al.
(författare)
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Testing Properties of Generic Functions
- 2006
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Software testing is an important part of the software development process. Testing comes in many flavours: unit testing, property testing, regression testing, contract checking, etc. QuickCheck is probably one of the most advanced tools for testing properties of functional programs. It supports the definition of properties and random test-data generators in Haskell, and checks that a property passes the test cases. A datatype-generic function is parametrised by a type. Examples of generic functions are equality tests, maps and pretty printers. A generic function can be seen as a template algorithm that can be instantiated with (the structure of) a data type. Generic functions satisfy generic properties. This paper discusses testing properties of generic functions. It shows how generic properties can be formulated, and how QuickCheck can be used to test generic properties. Furthermore, it shows how to automatically generate QuickCheck generators using Generic Haskell.
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