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Graduate Studies (until 1993)
Studies: software engineering, formal languages, protocol
specification, distributed systems; Minor studies:
electrical engineering; Master thesis: "A Formal Security
Model for Message Handling Systems (MHS)".
Research Assistant: Specification and implementation of a
Security Interoperability Sublayer; Design and implementation of
an object-oriented extension of the specification language SDL.
Studies Abroad: two terms at the University of
Waterloo/Canada; Studies in realtime systems and compiler construction.
Research Area 'Security' (1990-1993)
Development of a Security Interoperability Layer (SIS)
between layers 3 and 4 of the ISO-OSI reference model as part of
a government-funded project. SIS introduces security mechanisms
such as encryption and authentication. The SIS-layer was to be designed
in such a way that the API defined by X.213 remains unchanged. X.213
defines an interface between ISO-OSI layers 3 and 4. The design of the SIS
protocol was implemented using the GEODE specification tool. The resulting
prototype was tested over a TCP-network .
A formal security model for Message Handling Systems (MHS)
according to X.400 was developed as a continuation of this project.
Specification of a formal threat analysis based on the Bell-LaPadula-Model.
As a requirement of the Bundesamtes für Sicherheit in der
Informationstechnik (BSI) the threat analysis was specified through
a formal model as well as mathematically verified according to the BSI
security standard Q7 .
Doctoral studies 'Service Trading' (1993-1997)
Development of a trading model for open distributed systems.
Investigation of appropriate type specification languages for services
, . In was shown that in the context of
open distributed systems type specifications are necessary at
different levels of abstraction (system vs. user level). Furthermore
no a-priori knowledge of existing type specifications can be
Development of a type specification language based on a knowledge
representation technique , . Definition of mapping rules for
DCE-IDL and CORBA-IDL to and from the knowledge representation
language . Prototype
implementation of a knowledge based trader including the IDL
translators . The work was later
funded by the Deutsche Telekom AG, where the concept of a knowledge
based trader was integrated into a TINA environment .
Postdoctoral studies 'Architectures of middleware platforms' (1997-2002)
Development of a CORBA compliant implementation called MICO for research and educational
purposes . Based on a
micro-kernel approach which moves extra functionality outside the
Object Request Broker (ORB). Integration of ATM transport
layer outside the ORB .
Development of a generic user interface to a-priori unknown
object types based on meta-data . Three book publications describing the usage as well as
the internal architecture of MICO by dpunkt-Publishers in Germany and
Morgan Kaufmann Publishers in the US. MICO is branded as CORBA compliant
by The Open Group and is widely used in industry and academia.
First International MICO Workshop held in Germany, November 1998.
Second International MICO Workshop held at Stanford University,
Research Area 'Conformance Testing and Web-Applications' (2002-2005)
First research area at the San Francisco State University is the
conformance testing of middleware platforms. Project lead for the
COST (CORBA Open Source Testing) effort at the OMG . Development of a programming
language independent method for functional testing based on
XML , . Second research area are web
applications; amongst others a generic web-based user interface
. Automatic translation of
desktop applications to web application
Specification of the XML11 protocol,
inspired by the X-Windows protocol.
XML11 is an XML-based, client-server abstract windowing protocol
. XML11 supports code migration
of business logic to the client. This code migration framework is
based on an XML-based programming language called XMLVM. XMLVM
is modeled after the Java virtual machine and allows easy translation
Research Area 'Embedded Systems and Sensor Networks' (since 2004)
Another research area at the San Francisco State University are
embedded systems and sensor networks. Agilent Labs funded a research
project for measuring water quality of the San Francisco Bay. In
cooperation with colleagues from the Romberg Tiburon Center we built
an end-to-end application to deliver realtime sensor data to the
desktop . Sensor data is relayed
to arbitrary consumers via a Sensor Management Framework (SMF)
. Use of Distributed Hash Tables
(DHT) to build a multicast tree to guarantee a scalable architecture
of the SMF . This part of the
project is funded by the National Science Foundation (NSF). The project
has become known under the acronym NetBEAMS (Networked Bay Environmental
Assessment Monitoring System) and has won the Duke Choice Award at the
JavaOne 2005 convention. Our web page for Bay Area sensory data
www.netbeams.org is being adopted
by other life science research groups along the Californian coast.
Seminars/Term Projects: Supervising of seminars in the area
of object-oriented concepts in distributed systems as well as term
projects in the area of distributed algorithms at the University of
Master thesis: Supervising of several master thesis on various
topics at the University of Frankfurt, Germany, the International
Computer Science Institute, Berkeley, and the San Francisco State
Lecturer position: 3-units class on C++ and Java at the Applied
University of Fulda, Germany (Fall 1996).
Classes: taught several 3-units classes at the San
Francisco State University since Fall 2002:
- Introduction to Computer Programming (C++)
- Operating Systems
- Advanced Operating Systems
- Distributed Systems