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Proceedings of the 9th Ph.D. retreat of the HPI Research School on service-oriented systems engineering
Design and implementation of service-oriented architectures impose numerous research questions from the fields of software engineering, system analysis and modeling, adaptability, and application integration. Service-oriented Systems Engineering represents a symbiosis of best practices in object orientation, component-based development, distributed computing, and business process management. It provides integration of business and IT concerns. Service-oriented Systems Engineering denotes a current research topic in the field of IT-Systems Engineering with high potential in academic research and industrial application. The annual Ph.D. Retreat of the Research School provides all members the...
Proceedings of the 10th Ph.D. Retreat of the HPI Research School on Service-oriented Systems Engineering
Design and Implementation of service-oriented architectures imposes a huge number of research questions from the fields of software engineering, system analysis and modeling, adaptability, and application integration. Component orientation and web services are two approaches for design and realization of complex web-based system. Both approaches allow for dynamic application adaptation as well as integration of enterprise application. Commonly used technologies, such as J2EE and .NET, form de facto standards for the realization of complex distributed systems. Evolution of component systems has lead to web services and service-based architectures. This has been manifested in a multitude of in...
An individual-centered approach to visualize people’s opinions and demographic informationc
The noble way to substantiate decisions that affect many people is to ask these people for their opinions. For governments that run whole countries, this means asking all citizens for their views to consider their situations and needs. Organizations such as Africa's Voices Foundation, who want to facilitate communication between decision-makers and citizens of a country, have difficulty mediating between these groups. To enable understanding, statements need to be summarized and visualized. Accomplishing these goals in a way that does justice to the citizens' voices and situations proves challenging. Standard charts do not help this cause as they fail to create empathy for the people behind ...
Snow Country
In the 87 issues of Snow Country published between 1988 and 1999, the reader can find the defining coverage of mountain resorts, ski technique and equipment, racing, cross-country touring, and the growing sport of snowboarding during a period of radical change. The award-winning magazine of mountain sports and living tracks the environmental impact of ski area development, and people moving to the mountains to work and live.
Alien Theory
From the early days of pulp magazines to contemporary works of science fiction, the subject of the alien has been a fertile and enduring--if not also the most vital--element of the genre. In Alien Theory, author Patricia Monk asserts that the creation of the alien in short fiction contributes substantially to humanity's understanding of its present status and future potential in the universe. By employing a Jungian and archetypal approach to these stories, Monk attempts to direct the attention of readers to the significance of the vast body of imaginative fiction about the alien, arguing that studying the alien will reveal why this archetype is necessary in the development of humanity's unde...
Modeling and Formal Analysis of Meta-Ecosystems with Dynamic Structure using Graph Transformation
The dynamics of ecosystems is of crucial importance. Various model-based approaches exist to understand and analyze their internal effects. In this paper, we model the space structure dynamics and ecological dynamics of meta-ecosystems using the formal technique of Graph Transformation (short GT). We build GT models to describe how a meta-ecosystem (modeled as a graph) can evolve over time (modeled by GT rules) and to analyze these GT models with respect to qualitative properties such as the existence of structural stabilities. As a case study, we build three GT models describing the space structure dynamics and ecological dynamics of three different savanna meta-ecosystems. The first GT mod...
Modeling and enacting complex data dependencies in business processes
Enacting business processes in process engines requires the coverage of control flow, resource assignments, and process data. While the first two aspects are well supported in current process engines, data dependencies need to be added and maintained manually by a process engineer. Thus, this task is error-prone and time-consuming. In this report, we address the problem of modeling processes with complex data dependencies, e.g., m:n relationships, and their automatic enactment from process models. First, we extend BPMN data objects with few annotations to allow data dependency handling as well as data instance differentiation. Second, we introduce a pattern-based approach to derive SQL queries from process models utilizing the above mentioned extensions. Therewith, we allow automatic enactment of data-aware BPMN process models. We implemented our approach for the Activiti process engine to show applicability.
