This paper presents a concurrent interpreter for a general-purpose concurrent logic programming language, Guarded Horn Clauses (GHC). Unlike typical implementations of GHC in logic programming languages, the interpreter is implemented in the Actor language Acore. The primary motivation for this work was to probe the strengths and weaknesses of Acore as a platform for developing sophisticated programs. The GHC interpreter provided a rich testbed for exploring Actor programming methodology. The interpreter is a pedagogical investigation of the mapping of GHC constructs onto the Actor model. Since we opted for simplicity over optimization, the interpreter is somewhat inefficient.

Systems thinking. Systems theory. The systems approach. All these concepts have in various guises been claimed as central to logistics management, since its dawning in the mid twentieth century. Such claims are the starting point of this dissertation, the purpose of which is to contribute to an increased understanding of systems thinking in logistics management research, both present and for future advances. The primary unit of analysis in this dissertation is thus logistics management research. The purpose is pursued through a strategy of triangulation of research approaches, via two research objectives: To describe the nature of systems thinking in logistics management research. To explore the merits for logistics management research of an interpretive approach to actors’ systems thinking. The term systems thinking in this dissertation denotes any somewhat ‘organised’ bodies of thought with aspirations to be ‘holistic’ in the sense of aiming for comprehensiveness. This part relates mostly to the systems part of the term. With regard to the other part, systems thinking is also regarded as a term that encompasses thinking about, and in terms of, systems; either that of researchers or that of actors in logistics practices. Systems thinking can sometimes be theorised on in such a way that it seems fair to label it as systems theory. Another term that is also frequently employed is systems approach. This denotes any approach to intervene in and/or conduct research on enterprises, with a holistic ambition. Such approaches can or cannot be informed by systems theory. By approach is meant the fundamental assumptions of the effort, such as ontological and epistemological positions, views on human nature, and methodologies. This dissertation employs an approach informed by a strand of systems theory labelled Critical Systems Thinking (CST). This builds on a pluralist strategy, which entails an awareness of the strengths and weaknesses of all types of systems approaches, and thus strives towards putting them to work under such circumstances in which they are best suited. The first objective is pursued by means of a combined inductive-deductive approach presented mainly through two peer-reviewed, published journal articles. The first is an extensive literature review of academic publications in logistics management; the second is a survey of logistics management academics. Results show that the systems thinking within the discipline most often is not informed by systems theory, and is oriented towards a narrow section of the available systems approaches. This is an approach that builds on an objective world-view (realist ontology), and which seeks knowledge in terms of different kinds of law-like regularities. There are variations to the kinds of knowledge that are sought, in the sense that some search for deeper, underlying generative mechanisms (structuralist epistemology), some seek causal relationships among observable phenomena (positivist epistemology). The common view on human nature is determinist, and methodologies are often quantitative. It is concluded that logistics management employs a functionalist systems approach, which implicitly assumes homogeneity in actors’ systems thinking in mutual contexts (i.e. shared logistics practices). The second objective is pursued by adopting an interpretive systems approach, thus embracing a nominalist ontology and interpretivist epistemology, in order to explore what benefits such a perspective can lend to logistics management. Informed by the pluralist commitment of CST, theoretical constructs and methods grounded in cognitive psychology are employed to study logistics management practitioners’ systems thinking through cognitive mapping. If this reveals heterogeneities in systems thinking among actors of a mutual context, in which a high degree of homogeneity can be expected, the rationale is that the dominant homogeneity assumption is insufficient. The study, presented through an unpublished working paper, concludes that actors’ systems thinking can differ in ways that render the assumptions of the functionalist systems approach inadequate. More thought, debate, and research on an interpretive systems approach within logistics management is called for. With constant expansions in the scope of ambition for logistics management in mind – towards larger enterprise systems in the spirit of supply chain management, towards more goals for enterprises than the traditional financial ones, and towards new application areas (e.g. healthcare) – it is recognised that more and more actors become stakeholders in the practices that logistics management research seeks to incorporate within its domain of normative ambitions. This leads to an expanding scope of voices that ought to be heard in order to legitimise efforts to improve logistics management practices. This in turn motivates that we should seek to accommodate not only interpretive systems approaches, but also emancipatory, in order to ensure normative prescriptions that are legitimate from the perspectives of as many stakeholders as possible, not only from the common a priori efficiency perspectives of functionalist logistics management research.

Discretion is commonly analyzed as the scope for choice set by formal superiors. This study aims at developing an alternative theory of discretion which also takes into account the assumptions of the actors in implementing positions. The theory is constructed with the purpose of being an empirical tool for analyzing discretion on a nation-wide basis and in a central-local government context. It concerns two main questions: to what extent does discretion vary and how can this variation be explained? The theory section concludes with a number of empirically testable hypotheses. The concept of discretion is defined as the scope for choice available to actors, in formally subordinate positions, vis-à-vis their superiors. It is seen as a special case of autonomy, as it is attributed to subordinates and primarily concerns one dimension of autonomy, namely freedom of action. In the second half of the study, the theory is applied empirically to the discretion available to Swedish local government Education Committees. A questionnaire study of all Education Committee Chairpersons and Chief Education Officers and in-depth interviews of a selected sample of these have been undertaken. The empirical study clearly indicates that there is variation in discretion. In spite of the uniformity of the system of governing local education, it is found that the limits for discretion are set differently by different Education Committee representatives. The variation follows a pattern which has been, at least partly, reconstructed. Variables which appear as important in explaining variation include: the extent to which the control system is regarded as efficient; the size and population density of the local authority; and individual traits such as length of experience and gender. However, our analysis also shows that these explanations are more valid in certain contexts than in others, which points the way for further research. / digitalisering@umu

The Independent Practice During the last hundred years, the music industry has evolved with the record labels playing a central role. However, many argue that this situation is about to change as record sales have decreased during the last ten years. This imminent change in the music industry will not only affect the multinational record labels, but also the independent record labels.  As record sales have decreased during the last ten years, the number of members in the Swedish Independent Music Producers Association (SOM) has increased and the association now includes 300 independent record labels which are responsible for around 30 percent of the music being produced in Sweden. However, they can be considered a dominated group within the music industry, since they only have around 10 percent of the total market shares when it comes to selling figures. Considering the changes in record sales, the domination of the major record labels and the somewhat fascinating growth of independent actors during turbulent times, this thesis will study how the Swedish independent actors relate to the practices and ideals relevant in the daily work of running an independent record label. The practices studied in this thesis are the practice of work, the practice of recognition and the practice of content production. The purpose of this thesis is to analyse how independence is constructed among the members of SOM. The thesis is based on material collected in a web survey as well as seven interviews with representatives of indie labels. The web survey was distributed to all members of SOM, and the interviewed informants were selected by snowball sampling, using a locator to find informants. The survey material was analysed with cluster and variance analysis, while the interview material was analysed using content analysis – searching for themes connected to the practices. All material is understood through the theoretical frame of the field theory. The main results of the study are that there are different ways of relating to practices among the Swedish independent actors, and that these ways of relating are closely connected to their position within the field. There are common ways of relating to practices such as always promoting DIY, the importance of music and the need to resist the dominance of the major labels. However, the independent actors are not consistent in how these commonalities work in practice. For example, DIY is not applied if it is not economically necessary, and the need to resist the major labels is only apparent when the independent actor has a weaker position within the field. The more established an independent actor is within the field, the lesser resistant he is against the dominating structures of the music industry.  As a result of a weakening resistance against the major labels, the independent actors turn to struggle each other.

This dissertation focuses the attention toward inventors and key actors involved in product development projects. The study focuses on how a new product development process is carried out operationally and strategically in small, technology-driven firms. The study is based on findings from four case studies among small aircraft manufacturers, two from Sweden, one from Germany, and one from northern Finland. By using one of the Swedish cases as a platform, issues concerning the development process emerged and were summarized in sixteen statemens. The statements were then used as themes and checkpoints when gathering information from the three additional cases. The analysis has been made in two steps; first, a comparison between the platform case and the additional case were made based on the statements, second, issues emerging from all four cases are discussed. The dissertation introduces perpetual product development as a terminology suitable for explaining the behaviour found in the studied firms. A foundation for perpetual product development is presented based on both actor and process characteristics. The actors are technology devotees with numerous ideas to pursue. Their technological interest result in a preference for the first part of the development process since they experience a higher degree of technological freedom from start. Once the product starts to materialize, the actors' possibility of incorporating new technical gadgets diminishes. As a consequence, a weaker interest for the exploitation/launch phase is present. The actors also have a time conception that differs from what is normally assumed. They do not consider speeding-to-market important, since the actors prefer a superior product than being first out on the market. Their attitude toward speeding-to- market also demand actors with a high degree of stamina, since it often involves projects carried out over a long period of time. Due to the individual characteristics described above, the process is technology-driven. The process also experience a fuzzy start and culmination. The actors will continue to make adjustments to the construction even after the product has been launched, if they believe it can be technically improved. A consequence regarding the way the actors are managing their firm is that there is a tendency to regard the product development as a leisure-time activity. In view of the findings, it can be established that each case has to be evaluated on its own merits, with regard to the central actors' personal objectives. / digitalisering@umu

The study of location has a long and extensive history. As this area of study has evolved, there has been an increased recognition of the challenges and the many significant external factors, driven by the changes of trends and criteria on location decisions. Whether it is the world economy, technology and environment issues, and it has affected the existing models used in production location decision.    The primary aim of this thesis was to review the broad base of literature of production location decision, especially on models and factors concerning the manufacturing and supply chain area. The thesis also uncovers previous research that has examined the current status concerning models and factors used in production localisation decision.   Following a brief quantitative analysis of the research area development, the project applied mainly a qualitative approach to the study. Literature databases, literature reviews and case study reports were used as data sources. Literature reviews were used as base for the description, explanation, exploration and correlation analyses within the study.   Based on existing literature, this thesis presents a framework to categorise the existing location models and factors. The framework presents the used models and factors in production location decisions. Three industrial case study reports (from master thesis projects from Väderstad, Alfdex and IKEA) were gathered and used to examine the researchers’ own synthetic framework and further explore the research questions. The result is summarized in the framework that can lead users to understand the current status and the trend concerning the models and factors used in production location decision.     Keywords: Location decision, Production location, Location models and Location factors, Models and actors categorization.

There has recently been a resurgence in interest in techniques for effective programming of multi-core computers. Most programmers find general-purpose concurrent programming to be extremely difficult. This difficulty severely limits the number of applications that currently benefit from multi-core computers. There already exist many concurrent solutions for the class of regular applications, which include various algorithms for linear algebra. For the class of irregular applications, which operate on dynamic and pointer- and graph-based structures, efficient concurrent solutions have so far remained elusive. Dataflow analysis applications, which are often found in compilers and program analysis tools, have received particularly little attention with regard to execution on multi-core machines. Operating on the theory that the Actor model, which structures computations as systems of asynchronously-communicating entities, is a more appropriate method for representing irregular algorithms than the shared-memory model, this work presents a concurrent Actor-based formulation of the IFDS, or Interprocedural Finite Distributive Subset, dataflow analysis algorithm. The implementation of this algorithm is done using the Scala language and its Actors library. This algorithm achieves significant speedup on multi-core machines without using any optimistic execution. This work contributes to Actor research by showing how the Actor model can be practically applied to a dataflow analysis problem. This work contributes to static analysis research by showing how a dataflow analysis algorithm can effectively make use of multi-core machines, allowing the possibility of faster and more precise analyses.

<p>This dissertation explains the influence of ethnic non-state actors on the management of International Crises. I begin by arguing that when actively engaged in a crisis, ethnic actors contribute to; crisis violence, indecisive outcomes, and the escalation of interstate tensions. They do so because their more robust sponsorship allows them to drive relatively hard bargains with the state they are in conflict with. The analysis contributes to the development of theory by filling a gap in the literature and helping to resolve an important debate. Here I consider the entire population of non-state actors as a topic for analysis. This is in contrast to the general trend, which is to treat non-state actors as part of the landscape in studies that are otherwise concerned with ethnic conflict, terrorism or nation-building. In addition, the analysis here helps resolve a debate between bargaining theorist and ethnic conflict scholars concerning the relevance of ethnicity for our understanding of (both interstate and intrastate) conflict. In particular it identifies mechanisms specifically associated with ethnic rebel groups and demonstrates that ethnicity has an influence on interstate conflict through the actions of violent non-state actors. In the analysis I build on the logic above to develop a series of testable hypotheses. I then collect a new data-set of crisis-dyad-years and identify each crisis with a participating non-state actor (NSA-Crises) as well as those with ethnic non-state actors. Next I conduct a series of quantitative test of the relationship between ethnic actor participation and crisis management. The results demonstrate that ethnically mobilized rebel groups influence crises in unique ways, causing higher levels of violence and a higher incidence of stalemate. These findings are robust to various model specifications and the relationship between ethnic actors and crisis management is not conditioned by state-based sponsorship. I conclude with a discussion of the implications of this analysis for both theory and policy-making.</p> / Dissertation

This thesis sought to understand reasons for noncompliant respondents and ineffective leadership in the National Incident Management System (NIMS) by Texas public safety training officers. Research has been conducted on the policies and their implications for NIMS, organizational culture and its impact on NIMS, and the hierarchy network of the Incident Command System (ICS). However, research evaluating the attitudes and perceptions regarding the effectiveness of NIMS is scarce. Training officers from rural fire departments, emergency medical services, and law enforcement agencies were the population for this study (n=33). The results of this study have implications for combined fire department, emergency medical services, and law enforcement training (interoperability), simplification of the management structure, and a mentoring program. This study should be explored further in an urban setting, based on this model. This study showed that respondents agreed that rural emergency responders tend to be noncompliant with NIMS. Respondents mentioned that rural emergency responders disagree with the effectiveness of NIMS. This study showed that a correlation occurred between the effectiveness of NIMS and the number of times a respondent was involved in a formal NIMS incident command. The following recommendations were made based on the findings and conclusions of this study. Researchers should continue to look at what public safety training officers believe affects the adaptability of NIMS. Training officers should consider contributing to the future NIMS curriculum. Training officers should focus on interoperability issues through increased field exercises. Research should be conducted to determine what improvements to curriculum effect future NIMS compliance. Further research should be conducted on the effectiveness of individual compliance, and achievement.

This thesis examines TOBB within the global and national socioeconomic context in which it operates, focusing on the last decade. Though states are the main governing bodies and important actors, the role of non-state actors (NSAs) is becoming increasingly important as they are able to intervene and influence policy decisions through various activities. They matter in issues regarding globalization and governance. They interact with various other actors, they have a role in governance schemes and they may have the capability to effect acceleration of globalization. In return they are also affected by this process. For this research project TOBB has been chosen as a case study to evaluate the impact of such institutions in this process. Information on TOBB, including its chamber features, its interactions in governance, its special projects, and its view-point (made public through certain declarations and criteria), the economic platforms in which it participates, its contribution to G20 meetings and establishment of C20 all show that TOBB has taken an active stand in this process during the last decade. The context within which TOBB operates is an enabling one, both domestically and internationally. A comparison of TOBB with FICCI, its organizational counterpart in India, further demonstrates that the overall impact of similar institutions, in our case chambers, is larger when the system is taken as a whole. In this thesis it is argued that TOBB &ldquo / matters&rdquo / and is able to intervene and influence decision making processes.