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  • 51.
    Abelow, Alexis
    et al.
    University of Utah, Salt Lake City, USA.
    Persson, Kristin
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Jager, Edwin
    Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, The Institute of Technology.
    Berggren, Magnus
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Zharov, Ilya
    University of Utah, Salt Lake City, USA.
    Electroresponsive Nanoporous Membranes by Coating Anodized Alumina with Poly(3,4-ethylenedioxythiophone) and Polypyrrole2014In: Macromolecular materials and engineering (Print), ISSN 1438-7492, E-ISSN 1439-2054, Vol. 299, no 2, 190-197 p.Article in journal (Refereed)
    Abstract [en]

    Electrically-active nanoporous membranes are prepared by coating the surface of anodized alumina with electroactive polymers using vapor phase polymerization with four combinations of conjugated polymers and doping ions: poly(3,4-ethylenedioxythiophone) and polypyrrole, FeCl3 and FeTs3. The permeability of the polymer-coated membranes is measured as a function of the applied electric potential. A reversible three-fold increase is found in molecular flux of a neutral dye for membranes in oxidized state compared to that in the reduced state. After analyzing various factors that may affect the molecular transport through these membranes, it is concluded that the observed behavior results mostly from swelling/deswelling of the polymers and from the confinement of the polymers inside the nanopores.

  • 52.
    Aberg, D
    et al.
    Royal Inst Technol, SE-16440 Kista, Sweden Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden.
    Storasta, Liutauras
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials.
    Hallen, A
    Royal Inst Technol, SE-16440 Kista, Sweden Linkoping Univ, Dept Phys & Measurement Technol, SE-58183 Linkoping, Sweden.
    Svensson, BG
    Implantation temperature dependent deep level defects in 4H-SiC2001In: Materials Science Forum, Vols. 353-356, 2001, Vol. 353-3, 443-446 p.Conference paper (Refereed)
    Abstract [en]

    Deep level transient spectroscopy spectra of the near Z-defect region (150-350K) were investigated for B implanted samples of low doses (10(8)-10(9) cm(-2)). For 300 degreesC implantation, a level at an energy of 0.41 eV below the conduction hand edge was found, referred to as the S-level. The S-center was shown to form in both implanted and electron irradiated 4H-SiC, either after room temperature (R.T.) implantation followed by mild heat treatments or lung R.T. storage (several months) or after 200-300 degreesC implantations/irradiations. The S-center was found to anneal out at temperatures above 250 degreesC.

  • 53.
    Aberger, Martin
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Effects of Nonlinearities in Black Box Identification of an Industrial Robot2000Report (Other academic)
    Abstract [en]

    This paper discusses effects of nonlinearities in black box identification of one axis of a robot. The used data come from a commercial ABB robot, IRB1400. A three-mass flexible model for the robot was built in MathModelica. The nonlinearities in the model are nonlinear friction and backlash in the gear box.

  • 54.
    Abidin, Aysajan
    Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
    Authentication in Quantum Key Distribution: Security Proof and Universal Hash Functions2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Quantum Key Distribution (QKD) is a secret key agreement technique that consists of two parts: quantum transmission and measurement on a quantum channel, and classical post-processing on a public communication channel. It enjoys provable unconditional security provided that the public communication channel is immutable. Otherwise, QKD is vulnerable to a man-in-the-middle attack. Immutable public communication channels, however, do not exist in practice. So we need to use authentication that implements the properties of an immutable channel as well as possible. One scheme that serves this purpose well is the Wegman-Carter authentication (WCA), which is built upon Almost Strongly Universal2 (ASU2) hashing. This scheme uses a new key in each authentication attempt to select a hash function from an ASU2 family, which is then used to generate the authentication tag for a message.

    The main focus of this dissertation is on authentication in the context of QKD. We study ASU2 hash functions, security of QKD that employs a computationally secure authentication, and also security of authentication with a partially known key. Specifically, we study the following.

    First, Universal hash functions and their constructions are reviewed, and as well as a new construction of ASU2 hash functions is presented. Second, security of QKD that employs a specific computationally secure authentication is studied. We present detailed attacks on various practical implementations of QKD that employs this authentication. We also provide countermeasures and prove necessary and sufficient conditions for upgrading the security of the authentication to the level of unconditional security. Third, Universal hash function based multiple authentication is studied. This uses a fixed ASU2 hash function followed by one-time pad encryption, to keep the hash function secret. We show that the one-time pad is necessary in every round for the authentication to be unconditionally secure. Lastly, we study security of the WCA scheme, in the case of a partially known authentication key. Here we prove tight information-theoretic security bounds and also analyse security using witness indistinguishability as used in the Universal Composability framework.

  • 55.
    Abidin, Aysajan
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Weaknesses of Authentication in Quantum Cryptography and Strongly Universal Hash Functions2010Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Authentication is an indispensable part of Quantum Cryptography, which is an unconditionally secure key distribution technique based on the laws of nature. Without proper authentication, Quantum Cryptography is vulnerable to “man-in-the-middle” attacks. Therefore, to guarantee unconditional security of any Quantum Cryptographic protocols, the authentication used must also be unconditionally secure. The standard in Quantum Cryptography is to use theWegman-Carter authentication, which is unconditionally secure and is based on the idea of universal hashing.

    In this thesis, we first investigate properties of a Strongly Universal hash function family to facilitate understanding the properties of (classical) authentication used in Quantum Cryptography. Then, we study vulnerabilities of a recently proposed authentication protocol intended to rule out a "man-in-the-middle" attack on Quantum Cryptography. Here, we point out that the proposed authentication primitive is not secure when used in a generic Quantum Cryptographic protocol. Lastly, we estimate the lifetime of authentication using encrypted tags when the encryption key is partially known. Under simplifying assumptions, we derive that the lifetime is linearly dependent on the length of the authentication key. Experimental results that support the theoretical results are also presented.

  • 56.
    Abidin, Aysajan
    et al.
    Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
    Larsson, Jan-Åke
    Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
    Direct proof of security of Wegman-Carter authentication with partially known key2014In: Quantum Information Processing, ISSN 1570-0755, E-ISSN 1573-1332, Vol. 13, no 10, 2155-2170 p.Article in journal (Refereed)
    Abstract [en]

    Information-theoretically secure (ITS) authentication is needed in Quantum Key Distribution (QKD). In this paper, we study security of an ITS authentication scheme proposed by Wegman& Carter, in the case of partially known authentication key. This scheme uses a new authentication key in each authentication attempt, to select a hash function from an Almost Strongly Universal2 hash function family. The partial knowledge of the attacker is measured as the trace distance between the authentication key distribution and the uniform distribution; this is the usual measure in QKD. We provide direct proofs of security of the scheme, when using partially known key, first in the information-theoretic setting and then in terms of witness indistinguishability as used in the Universal Composability (UC) framework. We find that if the authentication procedure has a failure probability ε and the authentication key has an ε´ trace distance to the uniform, then under ITS, the adversary’s success probability conditioned on an authentic message-tag pair is only bounded by ε +|Ƭ|ε´, where |Ƭ| is the size of the set of tags. Furthermore, the trace distance between the authentication key distribution and the uniform increases to |Ƭ|ε´ after having seen an authentic message-tag pair. Despite this, we are able to prove directly that the authenticated channel is indistinguishable from an (ideal) authentic channel (the desired functionality), except with probability less than ε + ε´. This proves that the scheme is (ε + ε´)-UC-secure, without using the composability theorem.

  • 57.
    Abidin, Aysajan
    et al.
    Linköping University, Department of Mathematics. Linköping University, The Institute of Technology.
    Larsson, Jan-Åke
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Lifetime of Authentication Using Encrypted Tags When the Encryption Key is Partially KnownManuscript (preprint) (Other academic)
    Abstract [en]

    Quantum cryptography is an unconditionally secure key growing technique provided that an unconditionally secure authentication protocol is combined with it. This paper is about the study of the lifetime of a message authentication scheme, where a message to be authenticated is first hashed by a secret–but fixed–Strongly Universal hash function then the output is encrypted with a one-time-pad key to generate a tag for the message. If the onetime-pad is completely secret, then the lifetime is exponential in the tag length. If, however, the one-time-pad key is partially known in each authentication round, as is the case in practical quantum key distribution protocols, then the picture is different; because the adversary’s partial knowledge of the one-time-pad key in each authentication round contributes to his/her ability to identify the secret hash function. We estimate the lifetime of this type of authentication. Here the parameters are the length of the key identifying the secret hash function and the amount of knowledge that Eve has on the one-time-pad. A theoretical estimate is presented, along with experimental results that support it.

  • 58.
    Abidin, Aysajan
    et al.
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Larsson, Jan-Åke
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Special Properties of Strongly Universal2 Hash Functions Important in Quantum Cryptography2009In: AIP Conference Proceedings, ISSN 0094-243X, Foundations of Probability and Physics—5, Växjö, augusti 2008, New York: American Institute of Physics , 2009, Vol. 1101, 289-293 p.Conference paper (Refereed)
    Abstract [en]

    Secure message authentication is an important part of Quantum Key Distribution. In this paper we analyze special properties of a Strongly Universal2 hash function family, an understanding of which is important in the security analysis of the authentication used in Quantum Cryptography. We answer the following question: How much of Alices message does Eve need to influence so that the message along with its tag will give her enough information to create the correct tag for her message?

  • 59.
    Abidin, Aysajan
    et al.
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Larsson, Jan-Åke
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    Vulnerability of "A Novel Protocol-Authentication Algorithm Ruling out a Man-in-the-Middle Attack in Quantum Cryptography"2009In: International Journal of Quantum Information, ISSN 0219-7499, Vol. 7, no 5, 1047-1052 p.Article in journal (Refereed)
    Abstract [en]

    In this paper, we review and comment on "A novel protocol-authentication algorithm ruling out a man-in-the-middle attack in quantum cryptography" [M. Peev et al., Int. J. Quant. Inf. 3 (2005) 225]. In particular, we point out that the proposed primitive is not secure when used in a generic protocol, and needs additional authenticating properties of the surrounding quantum-cryptographic protocol.

  • 60.
    Abidin, Aysajan
    et al.
    Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
    Pacher, Christoph
    Austrian Institute of Technology, Austria.
    Lorünser, Thomas
    Austrian Institute of Technology, Austria.
    Larsson, Jan-Åke
    Linköping University, Department of Electrical Engineering, Information Coding. Linköping University, The Institute of Technology.
    Peev, Momtchil
    Austrian Institute of Technology, Austria.
    Quantum cryptography and authentication with low key-consumption2011In: Proceedings of SPIE - The International Society for Optical Engineering, 2011, 818916- p.Conference paper (Refereed)
    Abstract [en]

    Quantum Key Distribution (QKD - also referred to as Quantum Cryptography) is a technique for secret key agreement. It has been shown that QKD rigged with Information-Theoretic Secure (ITS) authentication (using secret key) of the classical messages transmitted during the key distribution protocol is also ITS. Note, QKD without any authentication can trivially be broken by man-in-the-middle attacks. Here, we study an authentication method that was originally proposed because of its low key consumption; a two-step authentication that uses a publicly known hash function, followed by a secret strongly universal2 hash function, which is exchanged each round. This two-step authentication is not information-theoretically secure but it was argued that nevertheless it does not compromise the security of QKD. In the current contribution we study intrinsic weaknesses of this approach under the common assumption that the QKD adversary has access to unlimited resources including quantum memories. We consider one implementation of Quantum Cryptographic protocols that use such authentication and demonstrate an attack that fully extract the secret key. Even including the final key from the protocol in the authentication does not rule out the possibility of these attacks. To rectify the situation, we propose a countermeasure that, while not informationtheoretically secure, restores the need for very large computing power for the attack to work. Finally, we specify conditions that must be satisfied by the two-step authentication in order to restore informationtheoretic security.

  • 61. Abom, A.E.
    et al.
    Comini, E.
    Dipto. di Chim. e Fis. dei Materaili, INFM, Università di Brescia, Via Valotti 9, I-251 33 Brescia, Italy.
    Sberveglieri, G.
    Dipto. di Chim. e Fis. dei Materaili, INFM, Università di Brescia, Via Valotti 9, I-251 33 Brescia, Italy.
    Finnegan, N.
    Ctr. for Microanalysis of Materials, Frederick Seitz Mat. Res. Laboratory, University of Illinois, Urbana, IL 61801, United States.
    Petrov, I.
    Ctr. for Microanalysis of Materials, Frederick Seitz Mat. Res. Laboratory, University of Illinois, Urbana, IL 61801, United States.
    Hultman, Lars
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.
    Erikssion, M.
    Experimental evidence for a dissociation mechanism in NH3 detection with MIS field-effect devices2003In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 89, no 1-2Article in journal (Refereed)
    Abstract [en]

    The gas response mechanism of ammonia detection with Pt-based metal-insulator-semiconductor (MIS) field-effect sensors was investigated. An experimental model system was designed which compares the responses of thick continuous Pt layers with controlled morphology and surface chemical composition, with the response of thin, discontinuous layers. The surface of a thick, continuous sputter-deposited Pt film is modified, either by (i) the deposition of a thin SiO2 overlayer, (ii) reactive sputter deposition of PtOx, or (iii) co-deposition of Pt with SiO2 in Ar + O2 atmospheres. We show that the ammonia response is caused by the formation of atomic hydrogen through the dissociation of NH3 at temperatures <200 °C. It is found that the modified surfaces exhibit increased ammonia selectivity compared to a pure Pt film. Results from this work indicate that the reason for the changed selectivity is the appearance of an oxidized PtOx phase or triple phase boundaries between Pt, SiO2 and the ambient gas, rather than for solely morphological reasons. © 2002 Elsevier Science B.V. All rights reserved.

  • 62. Abom, A.E.
    et al.
    Comini, E.
    Sberveglieri, G.
    Hultman, Lars
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.
    Eriksson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Thin oxide films as surface modifiers of MIS field effect gas sensors2002In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 85, no 1-2, 109-119 p.Article in journal (Refereed)
    Abstract [en]

    The catalytic activity at the surface of Pt based MIS field effect gas sensors is modified by the deposition of thin films of SnO2, Al2O3 and SiO2, grown by reactive sputtering. It is found that a very thin layer (<10 nm) of SiO2 and SnO2 changes the catalytic activity towards higher NH3 selectivity, but with thicker films the sensor response vanishes. Since the response mechanism for these sensors is dependent on dissociation of molecules, it is likely that at low temperatures (140 °C), neither dissociation on nor transport/diffusion through the thicker films takes place. However, with Pt in conjunction with SiO2 or SnO2, the surface reactions will be altered, with enhanced NH3 selectivity as a result. A thin film of Al2O3, on the other hand, has a much smaller influence on the gas response to the test gases used in this work. Furthermore the sputtering process is found to strongly influence the sensor responses, and specifically reduce the sensitivity of the sensor. A thin intermediate layer of evaporated Pt does not completely protect the underlying structure from sputter induced damage. © 2002 Elsevier Science B.V. All rights reserved.

  • 63. Abom, A.E.
    et al.
    Haasch, R.T.
    Frederick Seitz Mat. Res. Laboratory, University of Illinois, Urbana, IL 61801, United States.
    Hellgren, N.
    Frederick Seitz Mat. Res. Laboratory, University of Illinois, Urbana, IL 61801, United States.
    Finnegan, N.
    Frederick Seitz Mat. Res. Laboratory, University of Illinois, Urbana, IL 61801, United States.
    Hultman, Lars
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.
    Eriksson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Characterization of the metal-insulator interface of field-effect chemical sensors2003In: Journal of Applied Physics, ISSN 0021-8979, Vol. 93, no 12, 9760-9768 p.Article in journal (Refereed)
    Abstract [en]

    The metal-insulator interface of hydrogen-sensitive metal-insulator-semiconductor capacitors, with SiO2 as the insulator and Pt as the metal contact, was discussed. It was found that the difference in hydrogen response between differently prepared devices was explained by a difference in concentration of available adsorption sites. The analysis showed that the concentration of Pt atoms in contact with the oxide affected both the hydrogen response and the metal-oxide adhesion.

  • 64. Abom, A.E.
    et al.
    Persson, Per
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.
    Hultman, Lars
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.
    Eriksson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
    Influence of gate metal film growth parameters on the properties of gas sensitive field-effect devices2002In: Thin Solid Films, ISSN 0040-6090, Vol. 409, no 2, 233-242 p.Article in journal (Refereed)
    Abstract [en]

    Thin films of Pt have been grown as gate metals on the oxide surface of gas sensitive field-effect devices. Both electron beam evaporation and dc magnetron sputtering has been used. The energy of the impinging Pt atoms, the substrate temperature and the thickness of the Pt film were used as parameters in this study. The influence of the growth parameters on the gas response has been investigated and compared with the properties of the films, studied by transmission electron microscopy, Auger electron spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The conditions during growth of the Pt film are found to have a large impact on the properties of the device. As expected, crystallinity, morphology and the metal/substrate interfacial structure are also affected by processing parameters. Three different growth processes stand out as the most promising from gas sensor considerations, namely room temperature evaporation, sputtering at high pressures and sputtering at high temperatures. The correlation between gas responses and properties of the gas sensitive layer is discussed. © 2002 Elsevier Science B.V. All rights reserved.

  • 65.
    Abouzeedan, Adli
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    SME Performance and Its Relationship to Innovation2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Current SME performance models suffer from a number of disadvantages. The models use intensively a business ratio approach, they look at SMEs as a homogenous group, they consider firms to be closed systems, they do not directly incorporate the impact of an enterprise’s innovation activities, and finally they are complex and rely on sophisticated statistical refining methods making them unpractical to use by SME managers. There are four major challenges when one tries to build SME performance models that lack these deficiencies. The first challenge is that the desired performance evaluation model must optimally incorporate both quantitative and qualitative input. The second challenge is that the model must incorporate non-financial input parameters, such as firm size and age (among others), in the performance evaluation models. The third is that the model must consider the variety of SMEs as concerns their business sectors, nationalities, sizes, and ages. The final challenge is that the model must be able to utilize existing limited information available from the SMEs bookkeeping practices in an optimal way.

    The thesis addresses three questions related to constructing a better SMEperformance model, namely (1) What are the advantages and disadvantages of the existing models used in evaluating SME performance? (2) What characterizes a comprehensive model for measuring SME performance with acknowledgement of the firm’s innovation activities? (3) How can a firm’s innovation activities be enhanced in relation to the firm’s external environment?

    To construct a model that copes with these challenges, I used a literature-based selection of parameters as well as a theory-based selection. I used both a conceptual approach and an empirical approach to discuss and propose a model, the Survival Index Value (or SIV) model, as an alternative to the existing performance models for SMEs.

    The major contributions of this thesis to the field of SME performance can be summarized in three outcomes: the SIV model as a new model of SME performance evaluation, the ASPEM as a new tool for strategic utilization of SME performance models, and a new approach to account for innovation in relation to the external environment of the firm using the IBAM tool.

    The work adds to the theory of the firm, as it presents a new way of evaluating firm performance. It also contributes to bridging the theory of the firm to organizational theory, by elevating the significance of networking and its impact on SME efficiency.

  • 66.
    Abouzeedan, Adli
    et al.
    Sahlgrenska Academy, University of Gothenburg, Sweden.
    Klofsten, Magnus
    Linköping University, Department of Management and Engineering, Project management, Innovations and Entrepreneurship . Linköping University, The Institute of Technology.
    Hedner, Thomas
    Sahlgrenska Academy, University of Gothenburg, Sweden.
    Analysis of a Swedish High Technology SME Using the Survival Index Value (SIV) Model2011In: Paper Sessions, Workshops and Special Meetings: The 56th ICSB World Conference, Stockholm, Sweden, 15th and 18th of June, ICSB , 2011, 170-179 p.Conference paper (Refereed)
    Abstract [en]

    One of the major deficiencies in the existing Small and Medium-sized Enterprises’ (SMEs) performance evaluation models is the fact that they lack a clear coupling to the issue of innovation and its impact on performance. A possible candidate model which could achieve this is the Survival Index Value (SIV) model. The model has a parameter incorporated in its structure, the technology-intake. This parameter can be used as an indicator of the degree of innovativeness of the firm. Previous works using the model looked at general performance without specific focus on innovation activities of the firm and without relating that to aspects of survival and growth. In this paper the aim was to demonstrate the ability of the SIV model to indicate a positive overall performance due to the intensive investment of a selected firm in innovation activities.

    The enterprise analyzed, Autoadapt AB, is a Swedish high technology firm working in adapting cars and automobiles to handicapped people. Due to the nature of their activities the firm has a high level of innovation input to be able to solve the complex problems related to usage of cars by disabled people. Both the product development process and managing the activities around it requires a high level of innovativeness and ingenuity. As thus the firm presented a very interesting object to study. The study has a clear significance as there is a need to differentiate the performance of innovation-intensive enterprises from firms who are using less investment in innovation in their activities. This can be done by considering the investment in new technologies both as product development and/or as investing in absorption of external management, product or process innovation. Applying the SIV model to run this analysis can help to demonstrate the need to incorporate the technology intake as an essential component of SME’s performance model.

    The results indicated that the SIVmodel is able to predict correctly the performance of the object firm. By having mostly positive survival factor values, which are single data-points, during years of operation, and also having mostly positive survivability coefficient values, which are agglomerate data-points, the SIVmodel proved its abilities. Clearly, the model has a good potential to be developed and fine-tuned even more. The SIV model can be tested further to look at deviations in performance of firms among different sectors and relates that to the innovativeness of whole sectors.

  • 67.
    Abouzeedan, Adli
    et al.
    University of Gothenburg.
    Klofsten, Magnus
    Linköping University, Department of Management and Engineering, Project management, Innovations and Entrepreneurship . Linköping University, The Institute of Technology.
    Hedner, Thomas
    University of Gothenburg.
    Implementing the SIV Model on an Intensively Innovation-Oriented Firm: The Case of Autoadapt AB2012In: World Journal of Entrepreneurship, Management and Sustainable Development, ISSN 2042-5961, Vol. 8, no 2/3, 122-145 p.Article in journal (Refereed)
    Abstract [en]

    Small to medium-sized enterprise (SME) evaluation models lack a clear coupling to innovation and its impact on firm performance. A model which can achieve this is the Survival Index Value (SIV) model. The purpose of this paper is to demonstrate the ability of the SIV model to indicate and predict the performance of a company. The firm, Autoadapt AB, is an innovation-oriented enterprise, adapting personal cars to be driven by handicapped people. The authors knew in advance about the good performance of the firm and its high efficiency in conducting its operations and expected the SIV model to reflect correctly on Autoadapt's performance. Because the handicap degree of each of the individuals who benefit from the firm activities differs from one person to another, product solutions have to be individually designed. Therefore the firm has had to pursue a high level of innovativeness and it had to abide with this policy right from the start. The product development processes in the firm needed to adapt to such strategies.

    To be able to demonstrate the ability of the SIV model to indicate a positive performance due to the intensive innovation activities of Autoadapt AB, a case study approach was used. Case studies are very suited for in-depth analysis of an object under a longer period of time. It is a widely-used research method in firm performance studies.

    The results of the SIV analysis indicated that the model is able to project correctly the performance of the object firm. At all the four levels of analysis, i.e. SI values, the SPI slope, the survival factors, and the survivability coefficients, the SIV analysis performance indicated a stable positive development of the firm through the life time of the enterprise.

    Measuring performance of SMEs is an important issue. There are couple of models stemming from the traditional accountancy disciplines in use; however these models suffer from clear disadvantages. Recently a new model, the SIV model, was introduced and has shown the ability of being a better candidate for performance analysis. The paper demonstrates the ability of the SIV model to judge correctly the performance of an innovative firm.

  • 68.
    Abraham-Nordling, Mirna
    et al.
    Karolinska institutet.
    Persson, Bengt
    Linköping University, Department of Physics, Chemistry and Biology, Bioinformatics. Linköping University, The Institute of Technology.
    Nordling, Erik
    Linköping University, Department of Physics, Chemistry and Biology, Bioinformatics. Linköping University, The Institute of Technology.
    Model of the complex of Parathyroid hormone-2receptor and Tuberoinfundibular peptide of39 residues2010In: BMC Reseach Notes, ISSN 1756-0500, Vol. 3, no 270Article in journal (Refereed)
    Abstract [en]

    Background

    We aim to propose interactions between the parathyroid hormone-2 receptor (PTH2R) and its ligand the tuberoinfundibular peptide of 39 residues (TIP39) by constructing a homology model of their complex. The two related peptides parathyroid hormone (PTH) and parathyroid hormone related protein (PTHrP) are compared with the complex to examine their interactions.

    Findings

    In the model, the hydrophobic N-terminus of TIP39 is buried in a hydrophobic part of the central cavity between helices 3 and 7. Comparison of the peptide sequences indicates that the main discriminator between the agonistic peptides TIP39 and PTH and the inactive PTHrP is a tryptophan-phenylalanine replacement. The model indicates that the smaller phenylalanine in PTHrP does not completely occupy the binding site of the larger tryptophan residue in the other peptides. As only TIP39 causes internalisation of the receptor and the primary difference being an aspartic acid in position 7 of TIP39 that interacts with histidine 396 in the receptor, versus isoleucine/histidine residues in the related hormones, this might be a trigger interaction for the events that cause internalisation.

    Conclusions

    A model is constructed for the complex and a trigger interaction for full agonistic activation between aspartic acid 7 of TIP39 and histidine 396 in the receptor is proposed.

  • 69.
    Abrahamsson, Henrik
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering.
    Carlson, Peter
    Linköping University, The Institute of Technology.
    Robust Torque Control for Automated Gear Shifting in Heavy Duty Vehicles2008Independent thesis Advanced level (professional degree), 20 points / 30 hpStudent thesis
    Abstract [en]

    In an automated manual transmission it is desired to have zero torque in the transmission when disengaging a gear. This minimizes the oscillations in the driveline which increases the comfort and makes the speed synchronization easier. The automated manual transmission system in a Scania truck, called Opticruise, uses engine torque control to achieve zero torque in the transmission.In this thesis different control strategies for engine torque control are proposed in order to minimize the oscillations in the driveline and increase the comfort during a gear shift. A model of the driveline is developed in order to evaluate the control strategies. The main focus was to develop controllers that are easy to implement and that are robust enough to be used in different driveline configurations. This means that model dependent control strategies are not considered.A control strategy with a combination of a feedback from the speed difference between the output shaft speed and the wheel speed, and a feedforward with a linear ramp, showed very good performance in both simulations and tests in trucks. The amplitude of the oscillations in the output shaft speed after neutralengagement are halved compared to the results from the existing method in Scania trucks. The new concept is also more robust against initial conditions and time delay estimations.

  • 70.
    Abrahamsson, Jesper
    Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
    Ett försprång till skapande - en undersökning om förutsättningarna för Musikproduktion på Kulturskolan2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med rapporten är att undersöka förutsättningarna för en introduktionskurs i musikproduktion på Kulturskolan i Karlskrona, samt att utforma en övergripande plan för undervisningen. Arbetet omfattar även en mindre undersökning av eventuella liknande kurser på kulturskolor i tolv större svenska städer. För att besvara frågeställningarna har intervjuer genomförts med lärare och ledning på Kulturskolan i Karlskrona, anställda på kulturskolor på andra orter, musikgymnasium i Karlskrona samt på kommunens kulturförvaltning. Undersökningen visade att endast två av tolv städer har motsvarande eller liknande kurser på sina kulturskolor. De materiella förutsättningarna för en musikproduktionskurs på Kulturskolan i Karlskrona är goda, i form av lokaler med befintlig ljudutrustning och programvara. När det gäller ekonomiska förutsättningar kommer Kulturskolans intäkter från elevavgifter och kommunala medel. Kursen skulle innebära en utgift för lärarlön, men i övrigt går den att starta utan ytterligare kostnader. På kommunens kulturförvaltning menar man att det är viktigt med bredd i Kulturskolans kursutbud och att en musikproduktionskurs kan berika det lokala kulturlivet. Kursen är tänkt att fokusera på musik med datorn. Momenten bör kretsa kring inspelningsprogram, mjukvaruinstrument, plugin-program, med inslag av arrangering och mixning. Kursens målsättningar ligger i linje med Kulturskolans policydokument och är inspirerade av liknande kurser på andra kulturskolor.

  • 71. Abrahamsson, Lena
    et al.
    Bengtsson, Lars
    Gremyr, Ida
    Kowalkowski, Christian
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Lindahl, Marcus
    Nilsson, Anders
    Rehn, Alf
    Segerstedt, Anders
    Säfsten, Kristina
    Öhman, Peter
    Industriell ekonomi och organisering2016Book (Refereed)
  • 72.
    Abrahamsson, Marcus
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    A platform for third-party applications on the web2013Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    A trend seen on the web today is to create a platform where externally developed applications can run inside some kind of main application. This is often done by providing an API to access data and business logic of your service and a sandbox environment in which third-party applications can run. By providing this, it is made possible for external developers to come up with new ideas based on your service. Some good examples on this are Spotify Apps, Apps on Facebook and SalesForce.com.

    Ipendo Systems AB is a company that develops a web platform for intellectual properties. Currently most things on this platform are developed by developers at Ipendo Systems AB. Some interest has though risen to enable external developers to create applications that will in some way run inside the main platform.

    In this thesis an analysis of already existing solutions has been done. These solutions were Spotify Apps and Apps on Facebook. The two have different approaches on how to enable third-party applications to run inside their own service. Facebook’s solution builds mainly on iframe embedded web pages where data access is provided through a web API. Spotify on the other hand hosts the third-party applications themselves but the applications may only consist of HTML5, CSS3 and JavaScript.

    In addition to the analysis a prototype was developed. The purpose of the prototype was to show possible ways to enable third-party applications to run inside your own service. Two solutions showing this were developed. The first one was based on Facebook’s approach with iframing of external web pages. The second was a slightly modified version of Spotify’s solution with only client-side code hosted by the main application. To safely embed the client side code in the main application a sandboxing tool for JavaScript called Caja was used.

    Of the two versions implemented in the prototype was the Iframe solution considered more ready to be utilized in a production environment than Caja. Caja could be seen as an interesting technique for the future but might not be ready to use today. The reason behind this conclusion was that Caja decreased the performance of the written JavaScript as well as adding complexity while developing the third-party applications.

  • 73.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Dagens Managementverktyg är alldeles för trubbigt.2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 5, 20-21 p.Article in journal (Other (popular science, discussion, etc.))
  • 74.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Det är skillnad på elitserien och lägre divisioner2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 4Article in journal (Other (popular science, discussion, etc.))
  • 75.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Logistics in the Strategy of the Firm2007In: NOFOMA,2006, 2007, 15-20 p.Conference paper (Refereed)
  • 76.
    Abrahamsson, Mats
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Nya tider kräver nya managementverktyg2003In: Management magazine, ISSN 1651-8055, Vol. 2Article in journal (Other academic)
    Abstract [sv]

       

  • 77.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Logistics in Corporate Strategy2010In: Dimensionen der Logistik / [ed] in Schönberger, R., & Elbert, R., Heidelberg: Gabler Research , 2010, 533-552 p.Chapter in book (Other academic)
    Abstract [de]

    Funktionen, Institutionen und Handlungsebenen beschreiben die drei Dimensionen des von Professor Dr. Dr. h.c. Hans-Christian Pfohl geschaffenen Logistikwürfels. Anlässlich seiner Emeritierung beleuchten Wissenschaftler und Praktiker in 75 Fachbeiträgen die Logistik mit all ihren Facetten und aktuellen Entwicklungen und geben Anregungen für die zukünftige Forschung und Praxis.

  • 78.
    Abrahamsson, Mats
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Logistics in Corporate Strategy2008In: Northern lights in logistics & supply chain management / [ed] Stentoft, Halldorsson, Jahre, Spens, Copenhagen: Copenhagen Business School Press, 2008, 1, 49-66 p.Chapter in book (Refereed)
    Abstract [en]

    "Northern Lights in Logistics & Supply Chain Management" portrays the past, present and future research of the subject in the Nordic countries. The NOFOMA conference - a network of Nordic researchers within the field of Logistics and Supply Chain Management - has been a focal point in the contribution to the continuous improvement and further development of Nordic research. The network has also opened up for interaction with fellow researchers from other countries. There are sixteen chapters in the book that in its own way colours the Nordic rainbow of research within Logistics and Supply Chain Management. The chapters are structured in four themes: 1) Origins and strategic aspects; 2) Research approaches in the Nordic countries; 3) Advancement of distribution strategies and; 4) Emerging application areas of logistics and SCM. The chapters provide an understanding and, perhaps more importantly, consciousness for scholars that are part of this research environment: Where are we now, what have we been influenced by, and in what area are we able to provide positive impact? The aim of the book is also to contribute to increased visibility to fellow international scholars within Logistics and Supply Chain Management.

  • 79.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aldin, Niklas
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Stahre, Fredrik
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Logistics Platforms for Improved Dynamic Effectiveness2003In: International Journal of Logistics Management, ISSN 0957-4093, Vol. 3Article in journal (Refereed)
  • 80.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    A model for measuring logistics structures2003In: ESTIEM magazine, ISSN 0874-5242, Vol. 25, no 2/2003Article in journal (Other academic)
    Abstract [en]

      

  • 81.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Ett avancerat laboratorium för visualisering av logistiksystem2004In: TH : Transport & Hantering, ISSN 0346-2773, Vol. 3, 18-19 p.Article in journal (Other (popular science, discussion, etc.))
  • 82.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Measuring Logistics Structure1999In: International Journal of Logistics Management, ISSN 0957-4093, Vol. 2, no 3, 263-284 p.Article in journal (Refereed)
  • 83.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Aronsson, Håkan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Lindskog, Magnus
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Beyond the Beer-Game: An Arena for Visualising Complex Logistics Systems.2004In: Annual NOFOMA Conference for Nordic Researchers in Logistics: Challenging Boundaries with Logistics.,2004, Linköping: Linköpings universitet , 2004Conference paper (Refereed)
  • 84.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Industrial marketing.
    Dynamic Effectiveness - Improved Industrial Distribution from Interaction between Marketing and Logistics Strategies2004In: Journal of Distribution Channels, ISSN 1046-669X, Vol. 12, no 2, 83-112 p.Article in journal (Refereed)
  • 85.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Logistics .
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics .
    Dynamic effectiveness: Improved industrial distribution from interaction between marketing and logistics strategies2005In: Journal of Distribution Channels, ISSN 1046-669X, Vol. 12, no 2, 83-112 p.Article in journal (Refereed)
    Abstract [en]

    Based on different observations, in theory as well as in practice, we have identified strategies and operations following two different tracks, striving in different directions, despite it being well known they should go hand in hand. For companies challenged by a more and more dynamic business environment with heavier market segmentation, additional marketing channels, increasing globalisation on supplier and customer side, and high pressure on profit margins, the result from this is competitive weakness. The purpose of this article is to switch focus from operational effectiveness and strategic positioning as static success concepts on how to improve industrial distribution, to dynamic challenges of how to continuously manage the interaction between marketing strategies and operations (e.g., logistics) under the influence of a dynamic business environment. From theories in market strategies, logistics, flexibility, and marketing channels together with empirical experience from a best practice case study, we are introducing a model for dynamic effectiveness, describing the different characteristics of a company and what to focus on in order to become more dynamic. In order to constantly move to new market positions, and at the same time, restructure logistics and improve operational effectiveness, we have identified the dynamic capabilities of an organisation to be the key to success in industrial distribution. We define dynamic effectiveness as "how fast-and-well a company can go from one strategic positioning and productivity frontier to another." It tells that a frequent interaction between new strategic moves and actions for higher operational effectiveness is required to be in pace with the dynamic and changing business environment and to stay ahead of competition. As a part, of this, best, practice logistics performance makes it possible not only to be more agile to new strategic moves, but also to drive strategic development from a high operational level. This is achieved by designing logistics to be a resource base to support and be an enabler for new strategic moves on the market. © 2004 by The Haworth Press, Inc. All rights reserved.

  • 86.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Brege, Staffan
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Industrial marketing.
    Norrman, Andreas
    Lunds universitet.
    Distribution Channel Reengineering - organizational separation of distribution and sales functions in the European market1998In: Transport Logistics, ISSN 0929-9645, Vol. 1, no 4, 237-249 p.Article in journal (Refereed)
  • 87.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Karlöf, Stefan
    Sonat, Sverige.
    Det dynamiska företaget: om följsamhet och flödesorienterade affärsmodeller2011 (ed. 1)Book (Other (popular science, discussion, etc.))
    Abstract [sv]

    Dagens osäkra affärsklimat betraktas av många som ett problem och en risk som måste hanteras. I den här boken vänder författarna på perspektivet och betraktar osäkerheten som en möjlighet till framgång - om företaget har tillräcklig dynamisk förmåga. Den dynamiska förmågan innebär att företaget snabbt kan förändra sin marknadsstrategi och sin dagliga verksamhet. Det kräver en tydlig och flödesorienterad affärsmodell med en effektiv och följsam kedja från leverantör till slutkund. Denna bok presenterar en modell för hur företaget kan uppnå en sådan dynamisk effektivitet och diskuterar hur man kan omsätta den i praktisk handling. Boken vänder sig till chefer och ledningsgrupper i företag som vill utvecklas i takt med omvärldens krav och därmed få bäst förutsättningar att överleva och växa i det krävande affärsklimatet - survival of the fittest!

  • 88.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Malmgren, Mike
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Andersson, Dan
    Chalmers.
    Inside the Core: Managing risks in Business Critical Outsourcing2011In: Proceedings of the 20th Annual IPSERA Conference, Vision 20/20 – Preparing Today for Tomorrow’s Challenges / [ed] F. Rozemeijer, M. Wetzels, L. Quintens, 2011, 1092-1101 p.Conference paper (Refereed)
    Abstract [en]

    Organizations are increasingly outsourcing business critical activities, which increases the risk of substantial negative impact on the financial and strategic business performance. The aim of this paper is to show how outsourcer and supplier seek to mitigate the risks during the negotiations and the ongoing operations of the outsourced activities. The conclusion is that risk mitigating dimensions are directional and operates at different organizational levels, and secondly, that the dimension operates sequentially as a means to mitigate performance and relational risks. It is also concluded that goodwill trust and a cooperative stance have substantial impact on the success of the outsourcing.

  • 89.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Malmgren, Mike
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Andersson, Dan
    Chalmers.
    Managing risk in complex and business critical outsourcing of services2011In: Proceedings of 18th International Annual Conference of the European Operations Management Association. EurOMA, 2011Conference paper (Refereed)
    Abstract [en]

    Over the past two decades the phenomenon of outsourcing of resources and activities has emerged as an important trend in a wide range of organizations and many companies are today outsourcing complex and business critical resources and activities. This increase in business criticality also increases the risk of substantial and negative impact on the financial and strategic performance. The proposition is that business critical outsourcing is approached with a joint risk perspective and that an understanding of the decision process is essential for success. Further, it is important to view outsourcing as an ongoing process with a number of key stages.

  • 90.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    The Role of Logistics in Retailers' Corporate Strategy: A Driver for Growth and Customer Value2010In: Supply Chain Forum: an International Journal, ISSN 1625-8312, Vol. 11, no 4, 14-23 p.Article in journal (Refereed)
    Abstract [en]

    This article explores the role of logistics and supply chain management (SCM) in retailers’ corporate strategy and is based on reviewing multiple qualitative case studies of companies in the Swedish food retail sector. The article proposes that the role of logistics for what is referred to in this paper as modern retailers is twofold: to create profitability and to support growth and market expansion. International modern retailers are empirically compared with similar companies in the Swedish market. The dominating Swedish food retailers have taken command in the food supply chain but are primarily concerned with traditional logistics roles in cost cutting. This role is perfectly fine as long as the strategic intent of the companies is focused on market retention and not on geographical expansion and/or new marketing or store concepts. We argue that the success of modern retailers in terms of growth rate, profitability, and market expansion is explained to a large extent by the role of logistics in corporate strategy—when the role for supporting growth and increasing customer value from high-performance supply capabilities is a driver for market expansion. However, in many of our cases the traditional logistics roles of cutting costs and lead-times is still the dominating pattern that limits the possibility of expanding into new markets. Better knowledge of logistics’ role in retail corporate strategy can help companies develop and improve their strategic intent as well as redefine the role of logistics.

  • 91.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Olle, Olsson
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The Role of Buying Groups in Retail Logistics2010Conference paper (Refereed)
  • 92.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Olsson, Olle
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    The role of purchasing groups in retail logistics2012In: Nordic Retail Research: Emerging Diversity / [ed] Johan Hagberg, Ulrika Holmberg, Malin Sundström, Lars Walter, Göteborg: Bokförlaget BAS , 2012, 1, 155-172 p.Chapter in book (Other academic)
    Abstract [en]

    This book aims to provide an illustration of the diversity that characterises contemporary Nordic research in the field of retail. The book draws on a large variety of methods, describes a variety of retail sectors and covers a large number of retail phenomena. The book is suitable for researchers, graduate students and professionals who want to learn more about contemporary retailing research

  • 93.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Sandberg, Erik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Logistik i svensk handel: Ett projekt finansierat av Handelns Utvecklingsråd2011Report (Other academic)
    Abstract [sv]

    Den här rapporten sammanfattar ett forskningsprojekt, Logistik i svensk handel, som har pågått under perioden juli 2009 t.o.m. februari 2011 och som är finansierat av Handelns Utvecklingsråd.

    En utgångspunkt och hypotes för projektet var att det finns avgörande branschmässiga skillnader i sättet att arbeta med logistikfrågor. En hypotes som har testats mot empirin, vilket har lett till slutsatsen att logistiken endast i begränsad omfattning är branschspecifik och att branschtillhörighet inte är den avgörande faktorn för hur logistiken utformas för handelsföretag. En viktigare faktor, är hur butikerna drivs visavi centrala enheter, hur integrationen ser ut mellan logistikstrategi och inköps- respektive marknadsstrategi, samt hur systemgränserna för logistiken definieras.

    Genom hela arbetet har vi jämfört den logistikbild vi har sett med en ”ideal bild”, i form av logistiken i internationell ”mega-retailing”, vilket idag representerar ”best practice” inom logistik och där logistiken är en integrerad del av företagens affärsmodell och ett direkt stöd för företagets lönsamhet och tillväxt. Den jämförelsen visar att det är mycket stora skillnader i logistikkompetens och mognad mellan olika företag och att logistik inom många handelsföretag fortfarande är ett område med stor förbättringspotential.

    Förutom den här rapporten har projektet genererat en lång rad akademiska artiklar som är publicerade i journaler och/eller har presenterats på konferenser och seminarier. Vi har varit i kontakt med ett stort antal, kollegor, företag och forskare i Sverige och andra länder för att samla material. Ett stort tack till alla de som har bidragit med material till projektet.

    Ett speciellt tack till Andreas Hedlund på Handelns Utvecklingsråd, som förutom finansiellt stöd har backat upp projektet med seminarier arrangerade av Handelns utvecklingsråd.

    Linköping i Maj 2011

    Mats Abrahamsson   Jakob Rehme   Erik Sandberg

  • 94.
    Abrahamsson, Mats
    et al.
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Stahre, Fredrik
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Huge-Brodin, Maria
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Rehme, Jakob
    Linköping University, Department of Management and Engineering, Industrial Marketing and Industrial Economics. Linköping University, The Institute of Technology.
    Andersson, Dan
    Linköping University, Department of Management and Engineering, Logistics Management. Linköping University, The Institute of Technology.
    Logistics Changes and Challenges in Swedish Food Supply Chains2008In: Nofoma 2008, 2008Conference paper (Refereed)
  • 95.
    Abrahamsson, Mats
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Economics, Logistics.
    Wandel, Sten
    Lunds universitet.
    Model of Tiering in Third Party Logistics with a Service Parts Distribution Case Study1998In: Transport Logistics, ISSN 0929-9645, Vol. 1, no 3, 181-194 p.Article in journal (Refereed)
  • 96.
    Abrahamsson, Robin
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Kovalev, Anton
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Lindell, Johan
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Lövhall, Jakob
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Nordfors, Per
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Rydström, Simon
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Stoltz, Robert
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Utveckling av energioptimeringsprogrammet Humble: erfarenheter från projekt i programvaruutveckling2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Den här rapporten behandlar ett kandidatarbete som utfördes mot Institutionen för ekonomisk och industriell utveckling. Arbetet gick ut på att modernisera det existerande programmet MODEST som använts för att beräkna optimala energisystem. Moderniseringen gjordes genom att skapa programmet Humble, vars funktionalitet bygger på MODEST.

    I den här rapporten beskrivs hur program kan utvecklas för att de ska vara enkla att använda, samt hur de kan konstrueras för att möjliggöra vidareutveckling. Dessa aspekter framställdes av kunden som viktiga i projektet.

    Gruppens tillvägagångssätt för att utveckla programmet förklaras och en överskådlig bild över den arkitektur som använts ges. De erfarenheter som gruppen förskaffat sig under projektet beskrivs och reflekteras över. Detta gäller såväl tekniska erfarenheter som erfarenheter kopplade till projektprocessen. Gruppmedlemmarnas personliga erfarenheter kopplade till de roller de haft i projektet beskrivs i individuellt skrivna delar.

    Slutligen diskuteras projektet och hur resultatet har uppnåtts, varefter slutsatser kopplade till frågeställningarna dras. Dessa slutsatser är att prototypning och användbarhetstester är effektiva metoder för att skapa program som är enkla att använda, samt att program som tillämpar tydligt dokumenterade designmönster och är modulärt uppbyggda möjliggör vidareutveckling.

  • 97.
    Abrahamsson, S.
    et al.
    SLU, Umeå, Sweden .
    Ahlinder, J.
    FOI, Umeå, Sweden .
    Waldmann, Patrik
    Linköping University, Department of Computer and Information Science, Statistics. Linköping University, The Institute of Technology.
    García-Gil, M. R.
    SLU, Umeå, Sweden .
    Maternal heterozygosity and progeny fitness association in an inbred Scots pine population2013In: Genetica, ISSN 0016-6707, E-ISSN 1573-6857, Vol. 141, no 1-3, 41-50 p.Article in journal (Refereed)
    Abstract [en]

    Associations between heterozygosity and fitness traits have typically been investigated in populations characterized by low levels of inbreeding. We investigated the associations between standardized multilocus heterozygosity (stMLH) in mother trees (obtained from12 nuclear microsatellite markers) and five fitness traits measured in progenies from an inbred Scots pine population. The traits studied were proportion of sound seed, mean seed weight, germination rate, mean family height of one-year old seedlings under greenhouse conditions (GH) and mean family height of three-year old seedlings under field conditions (FH). The relatively high average inbreeding coefficient (F) in the population under study corresponds to a mixture of trees with different levels of co-ancestry, potentially resulting from a recent bottleneck. We used both frequentist and Bayesian methods of polynomial regression to investigate the presence of linear and non-linear relations between stMLH and each of the fitness traits. No significant associations were found for any of the traits except for GH, which displayed negative linear effect with stMLH. Negative HFC for GH could potentially be explained by the effect of heterosis caused by mating of two inbred mother trees (Lippman and Zamir 2006), or outbreeding depression at the most heterozygote trees and its negative impact on the fitness of the progeny, while their simultaneous action is also possible (Lynch. 1991). However,since this effect wasn’t detected for FH, we cannot either rule out that the greenhouse conditions introduce artificial effects that disappear under more realistic field conditions.

  • 98.
    Abrahamsson, Thomas
    et al.
    Saab Military Aircraft, Sweden.
    Andersson, Magnus
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    McKelvey, Tomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Finite Element Model Updating Formulation Using Frequency Responses and Eigenfrequencies1996Report (Other academic)
    Abstract [en]

    A novel frequency and modal domain formulation of the model updating problem is presented. Deviations in discrete frequency responses and eigenfrequencies, between the model to be updated and a reference model, constitute the criterion function. A successful updating thus results in a model with the reference's input-output relations at selected fre- quencies. The formulation is demonstrated to produce a criterion function with a global minimum having a large domain of attraction with respect to stiffness and mass variations. The method relies on mode grouping and uses a new extended modal assurance criterion number (eMAC) for identifying related modes. A quadratic objective with inexpensive evaluation of approximate Hessians give a rapid convergence to a minimum by the use of a regularized Gauss-Newton method. Physical bounds on parameters and complementary data, such as structural weight, are treated by imposing set constraints and linear equality constraints. Efficient function computation is obtained by model reduction using a moderately sized base of modes which is recomputed during the minimization. Statistical properties of updated parameters are discussed. A verification example show the performance of the method.

  • 99.
    Abrahamsson, Tomas
    et al.
    Saab Military Aircraft, Sweden.
    McKelvey, Tomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Study of some Approaches to Vibration Data Analysis1993Report (Other academic)
    Abstract [en]

    Using data from extensive vibrational tests of the new aircraft Saab 2000 three different methods for vibration analysis are studied. These methods are ERA (eigensystem realization algorithm), N4SID (a subspace method) and PEM (prediction error approach). We find that both the ERA and N4SID methods give good initial model parameter estimates that can be further improved by the use of PEM. We also find that all methods give good insights into the vibrational modes.

  • 100.
    Abrasonis, Gintautas
    et al.
    Forschungszentrum Dresden Rossendotf.
    Oates, Thomas
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
    Kovacs, Gyoergy J
    Forschungszentrum Dresden Rossendotf.
    Grenzer, Joerg
    Forschungszentrum Dresden Rossendotf.
    Persson, Per
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
    Heinig, Karl-Heinz H
    Forschungszentrum Dresden Rossendotf.
    Martinavicius, Andrius
    Forschungszentrum Dresden Rossendotf.
    Jeutter, Nicole
    Forschungszentrum Dresden Rossendotf.
    Baehtz, Carsten
    Forschungszentrum Dresden Rossendotf.
    Tucker, Mark
    University of Sydney.
    Bilek, Marcela M M
    University of Sydney.
    Moeller, Wolfhard
    Forschungszentrum Dresden Rossendotf.
    Nanoscale precipitation patterns in carbon-nickel nanocomposite thin films: Period and tilt control via ion energy and deposition angle2010In: JOURNAL OF APPLIED PHYSICS, ISSN 0021-8979, Vol. 108, no 4, 043503- p.Article in journal (Refereed)
    Abstract [en]

    Periodic precipitation patterns in C:Ni nanocomposites grown by energetic ion codeposition are investigated. Films were grown at room temperature by ionized physical vapor deposition using a pulsed filtered cathodic vacuum arc. We reveal the role of the film composition, ion energy and incidence angle on the film morphology using transmission electron microscopy and grazing incidence small angle x-ray scattering. Under these growth conditions, phase separation occurs in a thin surface layer which has a high atomic mobility due to energetic ion impacts. This layer is an advancing reaction front, which switches to an oscillatory mode, producing periodic precipitation patterns. Our results show that the ion induced atomic mobility is not random, as it would be in the case of thermal diffusion but conserves to a large extent the initial direction of the incoming ions. This results in a tilted pattern under oblique ion incidence. A dependence of the nanopattern periodicity and tilt on the growth parameters is established and pattern morphology control via ion velocity is demonstrated.

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