Vienna University

Displaying 1-32 of 32 results

  • White Papers // Jan 2013

    A Study on the Effects of Routing Symbol Design on Process Model Comprehension

    Process modeling grammars are used to create models of business processes. In this paper, the authors discuss how different routing symbol designs affect an individual's ability to comprehend process models. They conduct an experiment with 154 students to ascertain which visual design principles influence process model comprehension. Their findings suggest...

    Provided By Vienna University

  • White Papers // Jun 2012

    Modeling Context-Aware RBAC Models for Business Processes in Ubiquitous Computing Environments

    With ubiquitous computing technologies, business processes become more mobile and distributed and are executed in varying contexts. Context-aware access control mechanisms are an important prerequisite to protect sensitive data and services in secure ubiquitous computing environments. In an IT-supported workflow, process-related context constraints are a means to consider context information...

    Provided By Vienna University

  • White Papers // May 2012

    A UML Extension for the Model-Driven Specification of Audit Rules

    In recent years, a number of laws and regulations (such as the Basel II accord or SOX) demand that organizations record certain activities or decisions to fulfill legally enforced reporting duties. Most of these regulations have a direct impact on the information systems that support an organization's business processes. Therefore,...

    Provided By Vienna University

  • White Papers // May 2012

    An Approach to Bridge the Gap Between Role Mining and Role Engineering Via Migration Guides

    Mining approaches, such as role mining or organizational mining, can be applied to derive permissions and roles from a system's configuration or from log files. In this way, mining techniques document the current state of a system and produce current-state RBAC models. However, such current-state RBAC models most often follow...

    Provided By Vienna University

  • White Papers // Aug 2011

    Detecting and Resolving Conflicts of Mutual-Exclusion and Binding Constraints in a Business Process Context

    Mutual exclusion and binding constraints are important means to define which combinations of subjects and roles can be assigned to the tasks that are included in a business process. Due to the combinatorial complexity of potential role-to-subject and task-to-role assignments, there is a strong need to systematically check the consistency...

    Provided By Vienna University

  • White Papers // May 2011

    Integrity and Confidentiality Annotations for Service Interfaces in SoaML Models

    This paper presents an approach for incorporating data integrity and data confidentiality into the Model-Driven Development (MDD) of process-driven Service-Oriented Architectures (SOAs) based on the OMG SoaML. Specifications for service interfaces are extended by UML activities to model invocation protocols. An invocation protocol makes the control and the object flows...

    Provided By Vienna University

  • White Papers // Mar 2011

    Cognitive Complexity in Business Process Modeling

    Although (business) process models are frequently used to promote human understanding of processes, practice shows that understanding complex models soon reach cognitive limits. The aim of this paper is to investigate the cognitive difficulty of understanding different relations between model elements. To allow for empirical assessment of this research question...

    Provided By Vienna University

  • White Papers // Feb 2011

    Recognising Activity Labeling Styles in Business Process Models

    Quality assurance is a serious issue for large-scale process modeling initiatives. While formal control flow analysis has been extensively studied in prior research, there is little work on how the textual content of a process model and its activity labels can be systematically analyzed. In this paper, it is a...

    Provided By Vienna University

  • White Papers // Aug 2010

    Growth Cycles: Transformation And Regional Development

    Departing from the renewed interest within economic history and neo-Schumpeterian perspectives on growth and economic transformation, the authors will suggest a theoretical framework for analyzing long term regional economic growth and transformation. Emphasis will be given to different driving forces and their various roles over time, lead-lag relations between industries...

    Provided By Vienna University

  • White Papers // Aug 2010

    Generic Algorithms for Consistency Checking of Mutual-Exclusion and Binding Constraints in a Business Process Context

    In this paper, the authors present generic algorithms to ensure the consistency of mutual-exclusion and binding constraints in a business process context. They repeatedly identified the need for such generic algorithms in their real-world projects. Thus, the algorithms are a result of the experiences they gained in analyzing, designing, and...

    Provided By Vienna University

  • White Papers // Apr 2010

    The Size Of The Government And Economic Growth: An Empirical Study Of Sri Lanka

    The new growth theory establishes, among other things, that government expenditure can manipulate economic growth of a country. This paper attempts to explain whether government expenditure increases or decreases economic growth in the context of Sri Lanka. Results obtained applying an analytical framework based on time series and second degree...

    Provided By Vienna University

  • White Papers // Jan 2010

    Which Policy Options For Europe In The Global Competition For Talent? Brain Competition Policy As A New Breed Of Locational Policy With Positive Externalities

    The emerging knowledge economy has led to an increase of demand and locational competition for highly-skilled labor. Brain Competition Policy (BCP) is the reaction from national and regional policymakers. In short, BCP refers to the attraction, education and circulation of talent in and between regional and national economies. This new...

    Provided By Vienna University

  • White Papers // Dec 2009

    On the Cognitive Effectiveness of Routing Symbols in Process Modeling Languages

    Process models provide visual support for analyzing and improving complex organizational processes. In this paper, the authors discuss differences of process modeling languages using cognitive effectiveness considerations, to make statements about the ease of use and quality of user experience. Aspects of cognitive effectiveness are of importance for learning a...

    Provided By Vienna University

  • White Papers // Dec 2009

    Towards a Usability Assessment of Process Modeling Languages

    Visual process models provide support for analyzing and improving complex organizational processes. In this paper, the authors discuss differences of process modeling languages according to their ease of use and quality of user experience. These aspects are of importance for learning a modeling language, creating models, and understanding models. Modeling...

    Provided By Vienna University

  • White Papers // Oct 2009

    Population Ageing And Endogenous Economic Growth

    This paper investigates the consequences of population ageing for long-run economic growth perspectives. The authors introduce population ageing into a generalized model of endogenous technological change incorporating the model of Romer (1990) and Jones (1995) as special cases. They find that increases in longevity have positive effects on steady state...

    Provided By Vienna University

  • White Papers // Sep 2009

    Decreasing Fertility, Economic Growth And The Intergenerational Wage Gap

    Persistent low fertility rates lead to lower population growth rates and eventually also to decreasing population sizes in most industrialized countries. There are fears that this demographic development is associated with declines in per capita GDP and possibly also increasing inequality of the wage distribution. The authors investigate whether this...

    Provided By Vienna University

  • White Papers // Aug 2009

    Firewire Blocker: A Software Defense Against Firewire-Based Physical Security Attacks on Windows Systems

    This paper presents a software solution to Firewire-based physical security attacks on Microsoft Windows operating systems. In this first proof-of-concept, the FirewireBlocker service is running with SYSTEM privileges in order to be able to enable/disable hardware. While users can normally not interface with service, risk for privilege escalation remains. For...

    Provided By Vienna University

  • White Papers // Jun 2009

    Establishing Context of Digital Objects' Creation, Content and Usage

    The context of objects is essential for the interpretation of information entities, for establishing their authenticity as well as ensuring appropriate use. Thus, documenting the context of creation and use is an essential task in digital library and document management settings, for retrieval tasks as well as for digital preservation....

    Provided By Vienna University

  • White Papers // Jun 2009

    Information Retrieval in the Semantic-LIFE Personal Digital Memory Framework

    Ever increasing capacities of contemporary storage devices inspire the vision to accumulate (personal) information without the need of deleting old data over a long time-span. Hence the target of SemanticLIFE project is to create a Personal Information Management system for a human lifetime data. One of the most important characteristics...

    Provided By Vienna University

  • White Papers // Apr 2009

    The Finance-Dominated Accumulation Regime, Income Distribution And The Present Crisis

    The paper discusses the interactions of changes in income distribution and the accumulation dynamics in the post-Fordist accumulation regime in OECD countries, which is characterized by deregulated financial markets. The neoliberal mode of regulation came with a decisive shift in power relations at the expense of labor, which is clearly...

    Provided By Vienna University

  • White Papers // Nov 2008

    The Role Of Structured Finance In The Overall Funding Strategy Of The CEE Banks. The Case Of Asset Securitisation

    Since the political changes in Eastern Europe took place, banks in this region have experienced a significant reorganization in structure, core activities and business understanding. These changes have led to the development of banking entities which are flexible, open to the new banking perspectives and react promptly to market changes....

    Provided By Vienna University

  • White Papers // Aug 2008

    Financial Uncertainty And Business Investment

    The paper seeks to contribute to the empirical analysis of financial uncertainty and investment from a Post Keynesian perspective. The paper uses the volatility of the exchange rate, the volatility of the stock market index, and the real gold price as indicators for financial uncertainty. An increase in the volatility...

    Provided By Vienna University

  • White Papers // Jun 2007

    What Makes Process Models Understandable?

    Despite that formal and informal quality aspects are of significant importance to Business Process Modeling, there is only little empirical work reported on process model quality and its impact factors. In this paper, the authors investigate understandability as a proxy for quality of process models and focus on its relations...

    Provided By Vienna University

  • White Papers // Apr 2007

    Extending the Discussion of Model Quality: Why Clarity and Completeness May not be Enough

    Quality of modeling for information systems analysis and design is an important field of research in which, however, a comprehensive and generally acknowledged understanding is still outstanding. Notions of "Model" and "Quality" often remain vague and focus on particular aspects such as "Syntax" or "Semantics" rather than a comprehensive perspective...

    Provided By Vienna University

  • White Papers // Mar 2007

    Formalization and Verification of EPCs with OR-Joins Based on State and Context

    The semantics of the OR-join in Business Process Modeling languages like EPCs or YAWL have been discussed for a while. Still, the existing solutions suffer from at least one of two major problems. First, several formalizations depend upon restrictions of the EPC to a sub-set. Second, several approaches contradict the...

    Provided By Vienna University

  • White Papers // Mar 2007

    Error Metrics for Business Process Models

    Little research has been conducted so far on causes for errors in Business Process Models. In this paper, the authors investigate on how mainly domain independent factors such as the size or complexity of models influence errors observed in a wide range of existing Business Process Models. In particular, they...

    Provided By Vienna University

  • White Papers // Feb 2007

    Extending Business Process Modeling Tools with Workflow Pattern Reuse

    For their reuse advantages, workflow patterns are increasingly attracting the interest of both researchers and vendors. However, actual workflow modeling tools do not provide functionalities that enable users to define, query, and reuse workflow patterns properly. In this paper, the authors gather a set of requirements for process modeling tools...

    Provided By Vienna University

  • White Papers // Nov 2006

    Towards EPC Semantics based on State and Context

    The semantics of the OR-join have been discussed for some time, in the context of EPCs, but also in the context of other Business Process Modeling languages like YAWL. In this paper, the authors show that the existing solutions are not satisfactory from the intuition of the modeler. Furthermore, they...

    Provided By Vienna University

  • White Papers // Nov 2006

    Integration of Conceptual Process Models by the Example of Event-driven Process Chains

    It has become common place in business life that companies with related operations engage in a so-called merger in order to benefit from synergies or from combined products and services. In order to handle the complexity of such an endeavour, it is important to utilize a structured approach for finding...

    Provided By Vienna University

  • White Papers // Jul 2006

    From WS-CDL Choreography to BPEL Process Orchestration

    The Web Service Choreography Description Language (WS- CDL) is a specification for describing multi party collaboration based on Web Services from a global point of view. WS-CDL is designed to be used in conjunction with the Web Services Business Process Execution Language (WS-BPEL or BPEL). As WS-CDL is a new...

    Provided By Vienna University

  • White Papers // Jun 2006

    Business Process Execution Language for Web Service (BPEL)

    The standardization of Business Process Management and workflow technology has been discussed for more than ten years. Several standardization bodies have proposed specifications for different aspects of Business Process Management. The five bodies that have gained the most attention in this context are WfMC, OMG, BPMI, W3C, and OASIS. BPEL...

    Provided By Vienna University

  • White Papers // Feb 2006

    Verification of Forbidden Behavior in EPCs

    Event-driven Process Chains (EPCs) are frequently used as a modeling language for the representation of business processes. As such, business analysts are familiar with using EPC models in the context of Business Process Management. Up to now, there is no verification technique available that allows business analysts to express forbidden...

    Provided By Vienna University

  • White Papers // Nov 2006

    Integration of Conceptual Process Models by the Example of Event-driven Process Chains

    It has become common place in business life that companies with related operations engage in a so-called merger in order to benefit from synergies or from combined products and services. In order to handle the complexity of such an endeavour, it is important to utilize a structured approach for finding...

    Provided By Vienna University

  • White Papers // Feb 2006

    Verification of Forbidden Behavior in EPCs

    Event-driven Process Chains (EPCs) are frequently used as a modeling language for the representation of business processes. As such, business analysts are familiar with using EPC models in the context of Business Process Management. Up to now, there is no verification technique available that allows business analysts to express forbidden...

    Provided By Vienna University

  • White Papers // Jun 2012

    Modeling Context-Aware RBAC Models for Business Processes in Ubiquitous Computing Environments

    With ubiquitous computing technologies, business processes become more mobile and distributed and are executed in varying contexts. Context-aware access control mechanisms are an important prerequisite to protect sensitive data and services in secure ubiquitous computing environments. In an IT-supported workflow, process-related context constraints are a means to consider context information...

    Provided By Vienna University

  • White Papers // Jul 2006

    From WS-CDL Choreography to BPEL Process Orchestration

    The Web Service Choreography Description Language (WS- CDL) is a specification for describing multi party collaboration based on Web Services from a global point of view. WS-CDL is designed to be used in conjunction with the Web Services Business Process Execution Language (WS-BPEL or BPEL). As WS-CDL is a new...

    Provided By Vienna University

  • White Papers // Mar 2011

    Cognitive Complexity in Business Process Modeling

    Although (business) process models are frequently used to promote human understanding of processes, practice shows that understanding complex models soon reach cognitive limits. The aim of this paper is to investigate the cognitive difficulty of understanding different relations between model elements. To allow for empirical assessment of this research question...

    Provided By Vienna University

  • White Papers // Jun 2006

    Business Process Execution Language for Web Service (BPEL)

    The standardization of Business Process Management and workflow technology has been discussed for more than ten years. Several standardization bodies have proposed specifications for different aspects of Business Process Management. The five bodies that have gained the most attention in this context are WfMC, OMG, BPMI, W3C, and OASIS. BPEL...

    Provided By Vienna University

  • White Papers // May 2012

    A UML Extension for the Model-Driven Specification of Audit Rules

    In recent years, a number of laws and regulations (such as the Basel II accord or SOX) demand that organizations record certain activities or decisions to fulfill legally enforced reporting duties. Most of these regulations have a direct impact on the information systems that support an organization's business processes. Therefore,...

    Provided By Vienna University

  • White Papers // May 2012

    An Approach to Bridge the Gap Between Role Mining and Role Engineering Via Migration Guides

    Mining approaches, such as role mining or organizational mining, can be applied to derive permissions and roles from a system's configuration or from log files. In this way, mining techniques document the current state of a system and produce current-state RBAC models. However, such current-state RBAC models most often follow...

    Provided By Vienna University

  • White Papers // May 2011

    Integrity and Confidentiality Annotations for Service Interfaces in SoaML Models

    This paper presents an approach for incorporating data integrity and data confidentiality into the Model-Driven Development (MDD) of process-driven Service-Oriented Architectures (SOAs) based on the OMG SoaML. Specifications for service interfaces are extended by UML activities to model invocation protocols. An invocation protocol makes the control and the object flows...

    Provided By Vienna University

  • White Papers // Aug 2009

    Firewire Blocker: A Software Defense Against Firewire-Based Physical Security Attacks on Windows Systems

    This paper presents a software solution to Firewire-based physical security attacks on Microsoft Windows operating systems. In this first proof-of-concept, the FirewireBlocker service is running with SYSTEM privileges in order to be able to enable/disable hardware. While users can normally not interface with service, risk for privilege escalation remains. For...

    Provided By Vienna University

  • White Papers // Jun 2009

    Establishing Context of Digital Objects' Creation, Content and Usage

    The context of objects is essential for the interpretation of information entities, for establishing their authenticity as well as ensuring appropriate use. Thus, documenting the context of creation and use is an essential task in digital library and document management settings, for retrieval tasks as well as for digital preservation....

    Provided By Vienna University

  • White Papers // Jun 2009

    Information Retrieval in the Semantic-LIFE Personal Digital Memory Framework

    Ever increasing capacities of contemporary storage devices inspire the vision to accumulate (personal) information without the need of deleting old data over a long time-span. Hence the target of SemanticLIFE project is to create a Personal Information Management system for a human lifetime data. One of the most important characteristics...

    Provided By Vienna University

  • White Papers // Oct 2009

    Population Ageing And Endogenous Economic Growth

    This paper investigates the consequences of population ageing for long-run economic growth perspectives. The authors introduce population ageing into a generalized model of endogenous technological change incorporating the model of Romer (1990) and Jones (1995) as special cases. They find that increases in longevity have positive effects on steady state...

    Provided By Vienna University

  • White Papers // Sep 2009

    Decreasing Fertility, Economic Growth And The Intergenerational Wage Gap

    Persistent low fertility rates lead to lower population growth rates and eventually also to decreasing population sizes in most industrialized countries. There are fears that this demographic development is associated with declines in per capita GDP and possibly also increasing inequality of the wage distribution. The authors investigate whether this...

    Provided By Vienna University

  • White Papers // Apr 2009

    The Finance-Dominated Accumulation Regime, Income Distribution And The Present Crisis

    The paper discusses the interactions of changes in income distribution and the accumulation dynamics in the post-Fordist accumulation regime in OECD countries, which is characterized by deregulated financial markets. The neoliberal mode of regulation came with a decisive shift in power relations at the expense of labor, which is clearly...

    Provided By Vienna University

  • White Papers // Apr 2010

    The Size Of The Government And Economic Growth: An Empirical Study Of Sri Lanka

    The new growth theory establishes, among other things, that government expenditure can manipulate economic growth of a country. This paper attempts to explain whether government expenditure increases or decreases economic growth in the context of Sri Lanka. Results obtained applying an analytical framework based on time series and second degree...

    Provided By Vienna University

  • White Papers // Aug 2010

    Growth Cycles: Transformation And Regional Development

    Departing from the renewed interest within economic history and neo-Schumpeterian perspectives on growth and economic transformation, the authors will suggest a theoretical framework for analyzing long term regional economic growth and transformation. Emphasis will be given to different driving forces and their various roles over time, lead-lag relations between industries...

    Provided By Vienna University

  • White Papers // Jan 2010

    Which Policy Options For Europe In The Global Competition For Talent? Brain Competition Policy As A New Breed Of Locational Policy With Positive Externalities

    The emerging knowledge economy has led to an increase of demand and locational competition for highly-skilled labor. Brain Competition Policy (BCP) is the reaction from national and regional policymakers. In short, BCP refers to the attraction, education and circulation of talent in and between regional and national economies. This new...

    Provided By Vienna University

  • White Papers // Nov 2008

    The Role Of Structured Finance In The Overall Funding Strategy Of The CEE Banks. The Case Of Asset Securitisation

    Since the political changes in Eastern Europe took place, banks in this region have experienced a significant reorganization in structure, core activities and business understanding. These changes have led to the development of banking entities which are flexible, open to the new banking perspectives and react promptly to market changes....

    Provided By Vienna University

  • White Papers // Aug 2008

    Financial Uncertainty And Business Investment

    The paper seeks to contribute to the empirical analysis of financial uncertainty and investment from a Post Keynesian perspective. The paper uses the volatility of the exchange rate, the volatility of the stock market index, and the real gold price as indicators for financial uncertainty. An increase in the volatility...

    Provided By Vienna University

  • White Papers // Jan 2013

    A Study on the Effects of Routing Symbol Design on Process Model Comprehension

    Process modeling grammars are used to create models of business processes. In this paper, the authors discuss how different routing symbol designs affect an individual's ability to comprehend process models. They conduct an experiment with 154 students to ascertain which visual design principles influence process model comprehension. Their findings suggest...

    Provided By Vienna University

  • White Papers // Feb 2011

    Recognising Activity Labeling Styles in Business Process Models

    Quality assurance is a serious issue for large-scale process modeling initiatives. While formal control flow analysis has been extensively studied in prior research, there is little work on how the textual content of a process model and its activity labels can be systematically analyzed. In this paper, it is a...

    Provided By Vienna University

  • White Papers // Aug 2011

    Detecting and Resolving Conflicts of Mutual-Exclusion and Binding Constraints in a Business Process Context

    Mutual exclusion and binding constraints are important means to define which combinations of subjects and roles can be assigned to the tasks that are included in a business process. Due to the combinatorial complexity of potential role-to-subject and task-to-role assignments, there is a strong need to systematically check the consistency...

    Provided By Vienna University

  • White Papers // Aug 2010

    Generic Algorithms for Consistency Checking of Mutual-Exclusion and Binding Constraints in a Business Process Context

    In this paper, the authors present generic algorithms to ensure the consistency of mutual-exclusion and binding constraints in a business process context. They repeatedly identified the need for such generic algorithms in their real-world projects. Thus, the algorithms are a result of the experiences they gained in analyzing, designing, and...

    Provided By Vienna University

  • White Papers // Dec 2009

    On the Cognitive Effectiveness of Routing Symbols in Process Modeling Languages

    Process models provide visual support for analyzing and improving complex organizational processes. In this paper, the authors discuss differences of process modeling languages using cognitive effectiveness considerations, to make statements about the ease of use and quality of user experience. Aspects of cognitive effectiveness are of importance for learning a...

    Provided By Vienna University

  • White Papers // Dec 2009

    Towards a Usability Assessment of Process Modeling Languages

    Visual process models provide support for analyzing and improving complex organizational processes. In this paper, the authors discuss differences of process modeling languages according to their ease of use and quality of user experience. These aspects are of importance for learning a modeling language, creating models, and understanding models. Modeling...

    Provided By Vienna University

  • White Papers // Nov 2006

    Towards EPC Semantics based on State and Context

    The semantics of the OR-join have been discussed for some time, in the context of EPCs, but also in the context of other Business Process Modeling languages like YAWL. In this paper, the authors show that the existing solutions are not satisfactory from the intuition of the modeler. Furthermore, they...

    Provided By Vienna University

  • White Papers // Jun 2007

    What Makes Process Models Understandable?

    Despite that formal and informal quality aspects are of significant importance to Business Process Modeling, there is only little empirical work reported on process model quality and its impact factors. In this paper, the authors investigate understandability as a proxy for quality of process models and focus on its relations...

    Provided By Vienna University

  • White Papers // Mar 2007

    Formalization and Verification of EPCs with OR-Joins Based on State and Context

    The semantics of the OR-join in Business Process Modeling languages like EPCs or YAWL have been discussed for a while. Still, the existing solutions suffer from at least one of two major problems. First, several formalizations depend upon restrictions of the EPC to a sub-set. Second, several approaches contradict the...

    Provided By Vienna University

  • White Papers // Mar 2007

    Error Metrics for Business Process Models

    Little research has been conducted so far on causes for errors in Business Process Models. In this paper, the authors investigate on how mainly domain independent factors such as the size or complexity of models influence errors observed in a wide range of existing Business Process Models. In particular, they...

    Provided By Vienna University

  • White Papers // Apr 2007

    Extending the Discussion of Model Quality: Why Clarity and Completeness May not be Enough

    Quality of modeling for information systems analysis and design is an important field of research in which, however, a comprehensive and generally acknowledged understanding is still outstanding. Notions of "Model" and "Quality" often remain vague and focus on particular aspects such as "Syntax" or "Semantics" rather than a comprehensive perspective...

    Provided By Vienna University

  • White Papers // Feb 2007

    Extending Business Process Modeling Tools with Workflow Pattern Reuse

    For their reuse advantages, workflow patterns are increasingly attracting the interest of both researchers and vendors. However, actual workflow modeling tools do not provide functionalities that enable users to define, query, and reuse workflow patterns properly. In this paper, the authors gather a set of requirements for process modeling tools...

    Provided By Vienna University