Non-Hermitian extended midgap states and bound states in the continuum

We investigate anomalous localization phenomena in non-Hermitian systems by solving a class of generalized Su-Schrieffer-Heeger/Rice-Mele models and by relating their provenance to fundamental notions of topology, symmetry-breaking and biorthogonality. We find two flavours of bound states in the continuum, both stable even in the absence of chiral symmetry. The first being skin bulk states which are protected by the spectral winding number. The second flavour is constituted by boundary modes associated with a quantized biorthogonal polarization. Furthermore, we find the extended state stemming from the boundary state that delocalizes while remaining in the gap at bulk critical points. This state may also delocalize within a continuum of localized (skin) states. These results clarify fundamental aspects of topology, and symmetry in the light of different approaches to the anomalous non-Hermitan bulk-boundary correspondence -- and are of direct experimental relevance for mechanical, electrical and photonic systems

Institutional ontology for Conceptual Modeling

Conceptual models are intended to capture knowledge about the world. Hence, the design of conceptual models could be informed by theories about what entities exist in the world and how they are constituted. Further, a common assumption within the field of conceptual modeling is that conceptual models and information systems describe entities in the real world, outside the systems. An alternative view is provided by an ontological commitment that recognizes that the institutional world is constructed through language use and the creation of institutional facts. Such an ontological commitment implies that there is an institutional reality, which, to a great extent, is constructed using information infrastructures. Accordingly, conceptual models have not only a descriptive role but also a prescriptive one, meaning that modelers set up a framework of rules that restrict and enable people to construct institutional reality using information infrastructures. Understanding the prescriptive role of conceptual models may revive the area of conceptual modeling in the information systems research community. Reviving conceptual modeling through institutional modeling is motivated by the effect that implemented conceptual models have on information infrastructures and institutions. The purpose of this article is to propose an institutional ontology that can support the design of information infrastructures. The ontology is theoretically informed by institutional theory and a communicative perspective on information systems design, as well as being empirically based on several case studies. It is illustrated using a case study in the welfare sector. A number of guidelines for modeling institutional reality are also proposed

Prestationsmätning av Kreativt Arbete : en kulturstudie

Authors : Maria Bergholtz, Alexander Westesson Tutor : Daniel Ericsson Title : Performance Measurement of Creative work – a culture study at PS Communication Keywords : Key Performance Indicators, Organizational Culture, Macro-culture, Subculture, Micro-culture, Art, Business, Creativity, PS Communication In the paper’s introductory chapter, the chosen problem area regarding art and business will be presented. The paper’s studied empirical case will also be introduced here. This then leads to the reports chosen research questions: How do the company management and the companies’ creative personnel approach differ in the discussion regarding performance measurement on PS Communication? - What causes these differences? What impact does the corporate culture have in the discussion about performance measurement of PS Communication? - Is the corporate culture weak or strong? The purpose of this paper is to resolve the stand still in the discussion regarding performance management by creating an understanding of different people active in the organization’s approach to performance measurement. To create a deeper understanding of where the different views have their origin, a cultural analysis will be performed. Then with that information, we hope that we will be able to create a basis for further discussion of performance measurement. The methodology chapter is based on a hermeneutic approach and qualitative approaches. In this chapter an introduction of the sample that has been made will also be presented and it will also describe the quality of the research. The chapter concludes with a presentation of the research process method. VI The theory chapter begins with a presentation of the problem between art and business. Then the theory behind creative ideal types, culture and power, and conflict will be presented. The paper’s empirical chapter is based on interviews with the two employees at PS Communication. It also includes revised information from the company’s employee handbook. The analysis chapter compares the theoretical chapter with the empirical findings, which creates an understanding for how situation at the company today. This will culminate into the paper’s conclusion, which states: The managements and the creators view on performance measurement are different in that management believes measurement gives them an overview of where in the organization they are profitable, which creates a strategy for where focus should be. The corporate culture has central roll in the conflict because of the differences that exists between the two subcultures. The differences due to management and the creative, belongs to two different subcultures with a widely different idea on how work should be valued. Two strong subcultures create one weak corporate culture

Institution Aware Conceptual Modelling

Conceptual modelling for information systems design is to alarge extent about describing and prescribing the actions and interactions of agents in organizations. Thus, rules, regulations, organizational roles and other institutional aspects become key notions for conceptual modelling. While modellers may intuitively take these notions into account when creating conceptual models, it would be valuable also to take a more systematic and methodical approach to institutional aspects in the modelling activity. As a first step to such a method, this paper proposes a set of guidelines that support a modeller in identifying classes in a domain model starting from an analysis of the institutional aspects of the domain. The guidelines build on an institutional ontology that describes key notions of institutions, including actors, rules, rights, contracts, and processes

Institutional ontology for conceptual modeling

Conceptual models are intended to capture knowledge about the world. Hence, the design of conceptual models could be informed by theories about what entities exist in the world and how they are constituted. Further, a common assumption within the field of conceptual modeling is that conceptual models and information systems describe entities in the real world, outside the systems. An alternative view is provided by an ontological commitment that recognizes that the institutional world is constructed through language use and the creation of institutional facts. Such an ontological commitment implies that there is an institutional reality, which, to a great extent, is constructed using information infrastructures. Accordingly, conceptual models have not only a descriptive role but also a prescriptive one, meaning that modelers set up a framework of rules that restrict and enable people to construct institutional reality using information infrastructures. Understanding the prescriptive role of conceptual models may revive the area of conceptual modeling in the information systems research community. Reviving conceptual modeling through institutional modeling is motivated by the effect that implemented conceptual models have on information infrastructures and institutions. The purpose of this article is to propose an institutional ontology that can support the design of information infrastructures. The ontology is theoretically informed by institutional theory and a communicative perspective on information systems design, as well as being empirically based on several case studies. It is illustrated using a case study in the welfare sector. A number of guidelines for modeling institutional reality are also proposed

BRINGING SPEECH ACTS INTO UMM WORK IN PROGRESS REPORT

In order to understand human communication, it is important to consider the means by which communication is carried out as well as the effects produced by communication. One way to do this is to view human actions as taking place in three different worlds: � The physical world. In this world, people carry out physical actions – they utter sounds

Misalignments of Social and Numerical Identity—An Ontological Analysis

Numerisk identitet är den relation som en individuell sak har till sig själv och endast sig själv, vilken inte är beroende av något annat objekt. Dock, i diskursen om identitetshantering, är identitet ofta något annat: en identifierare som en organisation har tilldelat någon enhet, här kallad social identitet. Dessa två uppfattningar av identitet är nära relaterade, eftersom sociala identiteter är utformade för att spegla numeriska identiteter ur ett organisatoriskt perspektiv. Men denna spegling kan lätt förvanskas eller bli missanpassad. Denna artikel erbjuder en ontologisk analys av relationerna mellan numerisk och social identitet, med fokus på att identifiera olika former av deras missanpassningar och potentiella orsaker till dessa. För analysen förlitar vi oss på Unified Foundational Ontology (UFO), och för den konceptuella modelleringen använder vi OntoUML. Resultatet av den ontologiska analysen tar formen av en konceptuell modell. Vi föreställer oss att denna modell inte bara kan klargöra teoretiska begrepp relaterade till identitet, utan också ha praktiska tillämpningar i att adressera frågor om rättigheter och handlingskraft inom digital identitetshantering.Numerical identity is the relation that an individual thing bears to itself and only itself, which is not dependent on any other object. However, in the discourse of identity management, identity is often something else: an identifier that an organization has assigned to some entity, here called social identity. These two notions of identity are closely related, as social identities are designed to mirror numerical identities from an organisational point of view. But this mirroring can easily break down or be misaligned. This paper offers an ontological analysis of the relationships between numerical and social identity, with a focus on identifying different forms of their misalignments and potential causes for these. For the analysis we rely on the Unified Foundational Ontology (UFO), and for the conceptual modelling we use OntoUML. The result of the ontological analysis takes the form of a conceptual model. We envisage that this model can not only clarify theoretical concepts related to identity, but also have practical applications in addressing issues of rights and agency in digital identity management