Joachim Hammer

OTH Regensburg, Mechanical Engineering, Faculty Member

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Stefano R L Campana

University of Siena / Università di Siena

Petko Kiriazov

Bulgarian Academy of Sciences

Peter Hobson

Queen Mary, University of London

Daniel Ribeiro

University of Otago

Enrico Dall'Ara

The University of Sheffield

naveen noronha

Visvesvaraya Technological University

Kaushik Mukherjee

Indian Institute of Technology Delhi

pasztai zoltan

University of Oradea

Sudheesh K Shukla, PhD

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Richard Crawford

The University of Texas at Austin

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Papers by Joachim Hammer

Process Connectors: Linking Distributed Processes In The Construction Supply Chain

This paper reviews the architecture, approaches, and research issues associated with the developm... more This paper reviews the architecture, approaches, and research issues associated with the development of process connectors. Process connectors are software links that support coordination of distributed processes (schedules in particular) across the many firms on a construction project. The architecture of a process connector is presented as an efficient approach for both initial setup and run-time capabilities. Process connectors include a stub for connection to each firm and a bridge between stubs. A stub represents company information, including schedules and resource assignments, and makes this information available for connection and evaluation. A bridge component validates schedule mappings between firms and includes limited capabilities for schedule evaluation and recommendation when participating firms' schedules do not correspond. Beyond the architecture, specific research issues reviewed include discovery and representation of firm specific information as well as const...

Ends and Means in Public Health Policy in Developing Countries

International discussions of public health policy strategies in developing countries have been ch... more International discussions of public health policy strategies in developing countries have been characterized by strong and conflicting positions. Differences regarding the means of health sector improvement can often be traced to differences about the ends, that is, the goals of the health sector. Three types of health sector goals are reviewed: health status improvement, equity and poverty alleviation, and individual welfare (utility) improvement. The paper argues that all three must be considered in developing health sector reform strategies in all countries. Highly normative policy positions often can be attributed a unidimensional affiliation with one health sector goal and denial of the relevance of the others. The current global interest in using cost-effectiveness analysis to set national health priorities is assessed in light of this eclectic approach. Examples are provided of how a health sector strategy based on cost-effectiveness would give sub-optimal solutions. These examples include situations where a private health care sector exists and provides some degree of substitution for publicly provided services; significantly high income elasticities exist for health care such that higher income beneficiaries may differentially capture public subsidies; and market failures exist in insurance. It is argued that these conditions are virtually universal in developing countries. Thus, rational policy development should explicitly consider multiple goals for the health sector.

From SEEKing Knowledge to Making Connections: Challenges, Approaches and Architectures for Distributed Process Integration

Lecture Notes in Computer Science, 2006

Abstract. Integration and coordination of distributed processes remains a cen-tral challenge of c... more

Enabling Supply-Chain Coordination: Leveraging Legacy Sources for Rich Decision Support

Applied Optimization, 2005

As supply chains come under escalating pressure for responsiveness to customer demands as well as... more As supply chains come under escalating pressure for responsiveness to customer demands as well as cost pressures, there is increased scope for decision support models to enhance coordination of supply chain activities. However, enhanced coordination implicitly requires sharing information about costs, production capacity, materials availability, delivery schedules, etc. This information is currently stored in a panoply of legacy information systems distributed across the many firms that comprise a given supply chain. As such, accessing useful information presents considerable technical challenges, effectively limiting the deployment of decision support tools for supply chain operations. The purpose of this chapter is to present the research issues and approaches to accessing or integrating data in legacy information systems. Current industry approaches to information integration, including information hubs and Web Services technologies, are briefly reviewed and critiqued as useful but inadequate to the task of integrating data stored in legacy systems. Recommended requirements for new methods include rapid deployment, ability to connect to heterogeneous legacy systems, composition of knowledge for decision support, and provision for secure data access. These requirements motivate a review of the research literature on knowledge extraction and composition. As an example of new methods built from current research, an integrated toolkit known as SEEK: Scalable Extraction of Enterprise Knowledge is presented. Capabilities and limitations of the SEEK toolkit are used to suggest novel areas of research in visualization and representation of data for human refinement of automatic integration results, as well as further development of evolutionary algorithms to enhance the scope of automatic knowledge extraction. Throughout the chapter, an example of a construction industry supply chain is used to motivate discussion.

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Integration of heterogeneous information sources

AN APPROACH TO RESOLVING SEMANTIC HETEROGENEITY IN A FEDERATION OF AUTONOMOUS, HETEROGENEOUS DATABASE SYSTEMS

by Joachim Hammer and Dennis McLeod

International Journal of Cooperative Information Systems, 1993

The Identification and Resolution of Semantic Heterogeneity in Multidatabase Systems

by Joachim Hammer and Dennis McLeod

This paper describes several aspects of theRemote--Exchange project at USC, which focuseson the c... more This paper describes several aspects of theRemote--Exchange project at USC, which focuseson the controlled sharing and exchange of informationamong autonomous, heterogeneous databasesystems. The spectrum of heterogeneity which mayexist among the components in a federation of databasesystems is examined, and an approach to accommodatingsuch heterogeneity is described. Anoverview of the Remote--Exchange experimentalsystem is provided.1 IntroductionConsider an environment consisting...

Malaria; New Patters and Perspectives

Situation-aware risk management in autonomous agents

Proceedings of the 14th ACM international conference on Information and knowledge management - CIKM '05, 2005

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Knowledge Management to Support Situation-aware Risk Management in Autonomous, Self-managing Agents

We present a novel approach to enable decision-making in a highly distributed multiagent environm... more We present a novel approach to enable decision-making in a highly distributed multiagent environment where individual agents need to act in an au- tonomous fashion. Our architecture framework integrates risk management, knowl- edge management, and agent deliberation to enable sophisticated, autonomous decision-making. Instead of a centralized knowledge repository, our approach sup- ports a highly distributed knowledge base in which each agent manages a fraction of the knowledge needed by the entire system. Our approach also addresses the fact that the desired knowledge is often highly dynamic, context-sensitive, incom- plete, or uncertain. Thus risk management becomes an integral component which enables context-based, situation-aware decision making, which in turn supports au- tonomous, self-managing behavior of the agents. A prototype system demonstrat- ing the feasibility of our approach is being developed as part of an ongoing funded research project.

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Special Issue on Materialised Views on Data Warehousing

A replicable Web-based negotiation server for e-commerce

Proceedings of the 33rd Annual Hawaii International Conference on System Sciences, 2000

... 4), a cost-benefit analysis component is called to perform quantitative analysis and to provi... more

Browsing tsim- mrs data sources through the web

Speeding Up Materialized View Selection in Data Warehouses Using a Randomized Algorithm

International Journal of Cooperative Information Systems, 2001

The IDEAL approach to Internet-based negotiation for e-business

Proceedings of 16th International Conference on Data Engineering (Cat. No.00CB37073), 2000

ABSTRACT With the emergence of e-business as the next killer application for the Web, automating ... more ABSTRACT With the emergence of e-business as the next killer application for the Web, automating bargaining-type negotiations between clients (i.e., buyers and sellers) has become increasingly important. With IDEAL (Internet based Dealmaker for e-business), we have developed an architecture and framework, including a negotiation protocol, for automated negotiations among multiple IDEAL servers. The main components of IDEAL are a constraint satisfaction processor (CSP) to evaluate a proposal, an Event-Trigger-Rule (ETR) server for managing and triggering the execution of rules which make up the negotiation strategy (rules can be updated at run-time to deal with the dynamic nature of negotiations), and a cost-benefit analysis to help in the selection of alternative strategies. We have implemented a fully functional prototype system of IDEAL to demonstrate automated negotiations among buyers and suppliers participating in a supply chain

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Data integration through transform reuse in the Morpheus project

Proceedings of the 2006 ACM SIGMOD international conference on Management of data - SIGMOD '06, 2006

1. INTRODUCTION Data warehouses have been prevalent in large enterprises for at least the last de... more

THALIA: Test Harness for the Assessment of Legacy Information Integration Approaches

21st International Conference on Data Engineering (ICDE'05), 2005

We introduce a new, publicly available testbed and benchmark called THALIA (Test Harness for the ... more We introduce a new, publicly available testbed and benchmark called THALIA (Test Harness for the Assessment of Legacy information Integration Approaches) to simplify the evaluation of existing integration technologies and to enable more thorough and more focused testing. THALIA provides researchers with a collection of downloadable data sources representing University course catalogs, a set of twelve benchmark queries, as well

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Making quality count in biological data sources

Proceedings of the 2nd international workshop on Information quality in information systems - IQIS '05, 2005

... 16. Mihaila, G., Raschid, L., Vidal, ME Querying &amp;amp;amp;quot;quality of data&am... more ... 16. Mihaila, G., Raschid, L., Vidal, ME Querying &amp;amp;amp;quot;quality of data&amp;amp;amp;quot; metadata. Proc. of the Third IEEE Meta-Data Conference. Bethesda, Maryland (April 1999), 526--531. ... Collaborative Colleagues: Alexandra Martinez: colleagues. Joachim Hammer: colleagues. ...

Information translation, mediation, and mosaic-based browsing in the TSIMMIS system

ACM SIGMOD Record, 1995

... TSIMMIS System* Joachim Hammer, Hector Garcia-Molina, Kelly Ireland, YannisPapakonstantinou, ... more

Dynamic Decision Support in Direct-Access Sensor Networks; A Demonstration

2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, 2006

This paper describes application demonstrations of a new middleware that supports dynamic decisio... more

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Process Connectors: Linking Distributed Processes In The Construction Supply Chain

Ends and Means in Public Health Policy in Developing Countries

From SEEKing Knowledge to Making Connections: Challenges, Approaches and Architectures for Distributed Process Integration

Lecture Notes in Computer Science, 2006

Abstract. Integration and coordination of distributed processes remains a cen-tral challenge of c... more

Enabling Supply-Chain Coordination: Leveraging Legacy Sources for Rich Decision Support

Applied Optimization, 2005

Download

Integration of heterogeneous information sources

AN APPROACH TO RESOLVING SEMANTIC HETEROGENEITY IN A FEDERATION OF AUTONOMOUS, HETEROGENEOUS DATABASE SYSTEMS

by Joachim Hammer and Dennis McLeod

International Journal of Cooperative Information Systems, 1993

The Identification and Resolution of Semantic Heterogeneity in Multidatabase Systems

by Joachim Hammer and Dennis McLeod

Malaria; New Patters and Perspectives

Situation-aware risk management in autonomous agents

Proceedings of the 14th ACM international conference on Information and knowledge management - CIKM '05, 2005

Download

Knowledge Management to Support Situation-aware Risk Management in Autonomous, Self-managing Agents

Download

Special Issue on Materialised Views on Data Warehousing

A replicable Web-based negotiation server for e-commerce

Proceedings of the 33rd Annual Hawaii International Conference on System Sciences, 2000

... 4), a cost-benefit analysis component is called to perform quantitative analysis and to provi... more

Browsing tsim- mrs data sources through the web

Speeding Up Materialized View Selection in Data Warehouses Using a Randomized Algorithm

International Journal of Cooperative Information Systems, 2001

The IDEAL approach to Internet-based negotiation for e-business

Proceedings of 16th International Conference on Data Engineering (Cat. No.00CB37073), 2000

Download

Data integration through transform reuse in the Morpheus project

Proceedings of the 2006 ACM SIGMOD international conference on Management of data - SIGMOD '06, 2006

1. INTRODUCTION Data warehouses have been prevalent in large enterprises for at least the last de... more

THALIA: Test Harness for the Assessment of Legacy Information Integration Approaches

21st International Conference on Data Engineering (ICDE'05), 2005

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Making quality count in biological data sources

Proceedings of the 2nd international workshop on Information quality in information systems - IQIS '05, 2005

Information translation, mediation, and mosaic-based browsing in the TSIMMIS system

ACM SIGMOD Record, 1995

... TSIMMIS System* Joachim Hammer, Hector Garcia-Molina, Kelly Ireland, YannisPapakonstantinou, ... more

Dynamic Decision Support in Direct-Access Sensor Networks; A Demonstration

2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, 2006

This paper describes application demonstrations of a new middleware that supports dynamic decisio... more

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