Proceedings RIDE '96. Sixth International Workshop on Research Issues in Data Engineering
Page 1. History Merging as a Mechanism for Concurrency Control in Cooperative Environments* Jurge... more Page 1. History Merging as a Mechanism for Concurrency Control in Cooperative Environments* Jurgen Wasch and Wolfgang Klas Integrated Publication and Information Systems Institute (GMD-IPSI) GMD - German National ...
Introduction and Motivation Applications very often have to handle multimedia data. They have to ... more Introduction and Motivation Applications very often have to handle multimedia data. They have to process, manipulate, present, audio, video, graphics, images, text, and combinations of these media types. One characteristics is that multimedia information often constitutes a huge amount of data. For example, 500 pages of text correspond to about 1 MB data, 500 images of JPEG compressed data amount in about 0.2 GB, 5 minutes of CD-DA quality audio amount in about 53 MB, 5 minutes of PAL-coded video corresponds to about 6.6 GB, and 5 minutes HDTV-coded video is in the order of 30 GB. For that very reason it is often necessary to have the multimedia data managed by a dedicated multimedia storage system. There are several approaches to the management of multimedia data by means of a database system [1]. One can distinguish between approaches which exploit traditional database technology without any adaptations or extensions of the conventional databa
Continuous delivery of media streams like video over IP networks so far is mainly handled by comm... more Continuous delivery of media streams like video over IP networks so far is mainly handled by commercial approaches that deliver the stream forward-oriented in their own proprietary format. Though some existing streaming technologies are able to adapt to varying bandwidths, they do not provide smooth reactions to user interactions with the continuous stream. We have developed the MPEG-L/MRP strategy, an adaptive prefetching algorithm for the MPEG-1 video format in combination with an intelligent buffering technique that allows for smooth and quick reactions to user interactions with the stream. With L/MRP [12] an approach already has been presented to deliver and buffer homogeneous continuous data streams like Motion-JPEG with special focus on fast reaction to user interactions. In contrast, the MPEG-1 encoding with its different frame types and the dependencies between frames opens the door to a more �ne-grained adaptation of the continous stream. However, the complexity of MPEG-1 c...
Proceedings of the 2020 2nd International Electronics Communication Conference, 2020
Blockchain systems make use of the Internet infrastructure to connect thousands of nodes in peer-... more Blockchain systems make use of the Internet infrastructure to connect thousands of nodes in peer-to-peer (P2P) networks. These connected nodes form complex ecosystems encompassing various technologies that collaborate to offer millions of users distributed, decentralized, secure, and read-only data stores. With the proliferation of various private and public platforms and applications that are built on top of blockchain technology, rich sources of several types of simple or complex datasets have been created. Consequently, new requirements for managing these rich data sources, integrating them with their hosting environment, and making them discoverable have emerged. Fulfilling these requirements calls for extending the architecture of current blockchain systems by adding different layers that offer dedicated services for handling the data and allowing for integrating the blockchain-based platforms and applications with other systems, including Web-based applications. In this paper, we present a novel approach aiming at extending the architecture of current blockchain systems by adding new service layers for processing the data and offering new services to provide a bridge between blockchain systems and Web-based external applications enabling them to query, retrieve, and access the datasets managed by robust permission-based access control.
Establishing a standard like Dublin Core is like building a bridge. It makes exchange possible. F... more Establishing a standard like Dublin Core is like building a bridge. It makes exchange possible. Fittingly, the Dublin Core conference 2008 is taking place in Berlin, which is often called a bridge between Western and Eastern Europe. This event reaches even beyond Europe, with registered participants from nations all over the world such as United States, South Africa, Japan and New Zealand. This year's conference will focus on metadata for social and semantic applications. For the first time, alongside the English tutorials there will be tutorials in German, prepared and presented by students from the University of Applied Sciences Potsdam. After three days of plenary as well as parallel sessions the conference will close on Friday with four different seminars focussing on interoperability and metadata vocabularies. Organizing such a conference would be impossible without the invaluable help of the following six organizations: the Competence Centre for Interoperable Metadata (KIM), the Max Planck Digital Library (MPDL), the Göttingen State and University Library (SUB), the German National Library (DNB), Humboldt-Universität zu Berlin (HU Berlin) and the Dublin Core Metadata Initiative (DCMI). For the funding we would like to thank the German Research Foundation (DFG) and the Federal Ministry of Education and Research (BMBF). Additionally we would like to thank Elsevier, the Common Library Network GBV, IBM, OCLC and Sun Microsystems for their generous sponsoring. Last but not least, the conference is supported by Wikimedia Deutschland, local support community of Wikipedia, the well-known online encyclopedia. We are sure that this year's conference will serve as a bridge between the participants and their knowledge, ideas and visions. With sincere wishes for a productive conference, Heike Neuroth Niedersächsische Staats-und Universitätsbibliothek Göttingen on behalf of the DC-2008 Host Organisation Committee The DC2008 proceedings represented in the following pages are the end-result of a long process that includes the submission of papers, reports, and posters; reviewing the submissions; organizing the accepted work among themes; and reviewing and formatting the final copies of the accepted works for publication in these proceedings. The process required the input of all members of the Program Committee and the Publications Committee. As conference Co-Chairs, we'd like to thank and acknowledge the efforts of the members of both of these committees, and, in particular, the outstanding and tremendous efforts of
Welcome to the 9th ACM Multimedia Conference, held Sept. 30-Oct.5, 2001 in Ottawa, Ontario, the c... more Welcome to the 9th ACM Multimedia Conference, held Sept. 30-Oct.5, 2001 in Ottawa, Ontario, the capital city of Canada. This beautiful city is often called "Silicon Valley North" because of the high concentration of major telecommunications and software companies, such as NORTEL, ALCATEL, CISCO, MITEL, COREL, COGNOS, JDS Uniphase, Entrust and many others. The conference complements this setting by presenting and exploring technological and artistic advancements in multimedia. Technical issues, theory and practice, artistic and consumer innovations will bring together researchers, artists, developers, educators, performers, and practitioners of multimedia. This conference is sponsored by NTT, ALCATEL, HP, Fuji-Xerox Palo Alto Laboratory, the Association for Computing Machinery (ACM) and its special interest groups SIGMM, SIGGRAPH, and SIGCOMM.Brigitte Kerherve did a tremendous job of selecting three outstanding workshops on emerging topics. Tamer Ozsu organized an exciting plenary panel and Ketan Mayer-Patel did again a wonderful job of organizing this year's doctoral symposium. Vincent Ofia did a splendid job in chasing the authors and organizing the papers. Roger Price has been working on the electronic proceedings since 1997.
Existing multimedia streaming technologies offer no specific support for user interaction like ju... more Existing multimedia streaming technologies offer no specific support for user interaction like jumping to bookmarks in a video, or switching to reverse play. When the users, e.g., jump to a bookmark, the player requests frames for the new presentation point from the server and resumes playing only when the data has arrived. Our solution for this problem is the client prefetching the buffering strategy, MPEG-L/MRP, that ensures that the frames which are needed for a response to a possible user interaction are already in the client's buffer, which leads to qucik and smooth reaction to user interactions. In case of variable bandwidth, our MPEG-1 streaming approach selects only a subset of all frames to be fetched from the server and supports a smooth presentation at a reduced frame rate with correct timelines.The technical demonstration shows the interactive streaming of MPEG-videos and illustrates our buffering and prefetching strategy.
With the emergence of cooperative applications it turned out that traditional transaction con- ce... more With the emergence of cooperative applications it turned out that traditional transaction con- cepts are not suitable for these scenarios. Isola- tion of transactions, as guaranteed by the ACID transaction properties, contradicts the need of cooperation between users. In this paper, we propose a cooperative activity model that pro- vides transactional properties suitable for coop- erative scenarios. Each user participating
Mobile devices are becoming more and more important in the context of e-learning. This requires a... more Mobile devices are becoming more and more important in the context of e-learning. This requires appropriate models for structuring and delivering content to be used on various devices. Different technical characteristics of devices as well as different needs of learners require specific approaches. In this paper we propose a model for structuring content that allows rendering for different devices like Notebooks, PDAs, and Smartphones as well as presentation of the content in different levels of details according to didactic concepts like case study, definition, example, interaction, motivation, directive. This approach allows adaptation of content (device, granularity of content, content selection based on didactic concepts) at run time to specific needs in a particular learning situation. The approach realized in the joint MobiLearn project of several universities in Austria shows high acceptance by students during an initial pilot application.
Transaction Management Support for Cooperative Applications, 1998
ABSTRACT This chapter describes the TRANSCOOP cooperative transaction model CoACT, and its underl... more ABSTRACT This chapter describes the TRANSCOOP cooperative transaction model CoACT, and its underlying paradigm of cooperative work. As motivated in Chapter 4 new application areas of the transaction concept impose new requirements on transaction models. In all of the discussed application areas there is a need to support the cooperation of human actors engaged in common tasks and working towards a common goal. a transaction model supporting cooperation should make the sharing and exchange of information among co-workers as natural as possible while still preserving a notion of consistency.
Proceedings of the seventh ACM international conference on Multimedia (Part 1) - MULTIMEDIA '99, 1999
Adaptation techniques for multimedia presentations are mainly concerned with switching between di... more Adaptation techniques for multimedia presentations are mainly concerned with switching between different qualities of single media elements to reduce the data volume and by this to adapt to limited presentation resources. This kind of adaptation, however, is limited to an inherent lower bound, i.e., the lowest acceptable technical quality of the respective media type. To overcome this limitation, we propose cross-media adaptation in which the presentation alternatives can be media elements of different media type, even different fragments. Thereby, the alternatives can extremely vary in media type and data volume and this enormously widens the possibilities to efficiently adapt to the current presentation resources. However, the adapted presentation must still convey the same content as the original one, hence, the substitution of media elements and fragments must preserve the presentation semantics. Therefore, our cross-media adaptation strategy provides models for the automatic augmentation of multimedia documents by semantically equivalent presentation alternatives. Additionally, during presentation, substitution models enforce a semantically correct information flow in case of dynamic adaptation to varying presentation resources. The cross-media adaptation strategy allows for flexible reuse of multimedia content in many different environments and, at the same time, maintains a semantically correct information flow of the presentation.
ICMI 2012 Chairs' Welcome Welcome to Santa Monica and to the 14 th edition of the International C... more ICMI 2012 Chairs' Welcome Welcome to Santa Monica and to the 14 th edition of the International Conference on Multimodal Interaction, ICMI 2012. ICMI is the premier international forum for multidisciplinary research on multimodal human-human and human-computer interaction, interfaces, and system development. We had a record number of submissions this year: 147 (74 long papers, 49 short papers, 5 special session papers and 19 demo papers). From these submissions, we accepted 15 papers for long oral presentation (20.3% acceptance rate), 10 papers for short oral presentation (20.4% acceptance rate) and 19 papers presented as posters. We have a total acceptance rate of 35.8% for all short and long papers. 12 of the 19 demo papers were accepted. All 5 special session papers were directly invited by the organizers and the papers were all accepted. In addition, the program includes three invited Keynote talks. One of the two novelties introduced at ICMI this year is the Multimodal Grand Challenges. Developing systems that can robustly understand human-human communication or respond to human input requires identifying the best algorithms and their failure modes. In fields such as computer vision, speech recognition, and computational linguistics, the availability of datasets and common tasks have led to great progress. This year, we accepted four challenge workshops: the AudioVisual Emotion Challenge (AVEC), the Haptic Voice Recognition challenge, the D-META challenge and Brain-Computer Interface challenge. Stefanie Telex and Daniel Gatica-Perez are co-chairing the grand challenge this year. All four Grand Challenges will be presented on Monday, October 22 nd , and a summary session will be happening on Wednesday, October 24 th , afternoon during the main conference. The second novelty at ICMI this year is the Doctoral Consortium-a separate, one-day event to take place on Monday, October 22nd, co-chaired by Bilge Mutlu and Carlos Busso. The goal of the Doctoral Consortium is to provide Ph.D. students with an opportunity to present their work to a group of mentors and peers from a diverse set of academic and industrial backgrounds and institutions, to receive feedback on their doctoral research plan and progress, and to build a cohort of young researchers interested in designing multimodal interfaces.
In object-oriented programming languages, multiple-dispatching provides increased expressive powe... more In object-oriented programming languages, multiple-dispatching provides increased expressive power over single-dispatching by guiding method lookup using the values of all arguments instead of the receiver only. There have been several programming languages supporting this mechanism and they demonstrate its usefulness. However, efficient implementation of multi-methods is still critical with regard to its success as a standard. In this paper, we present a new mechanism for implementing multi-methods dynamic lookup based on automaton techniques. Analysis and experimental results show that our strategy is time and space efficient. The presented result can provide the basis for designing new object-oriented paradigms based on multi-methods. 1. the first argument can be understood as the method receiver.
In this paper, we outline the features of a knowledge-based retrieval interface MERIT (Multimedia... more In this paper, we outline the features of a knowledge-based retrieval interface MERIT (Multimedia Extensions of Retrieval Interaction Tools), and VODAK, an object-oriented DBMS suitable for multimedia data. MERIT offers access to a subset of the CORDIS databases with data about European research programs, projects, and consortia in the field of information technology. The system features graphical presentations of retrieval results, employs interactive maps for geographical data, and provides scanned-in documents, e.g. photos of contact persons. The database management system functionality of VODAK is extended such that it treats multimedia data, like text, audio, or video, as an integral part of the databases. Furthermore VODAK is an extendible database management system which allows to integrate information from heterogeneous and distributed resources.
Multimedia Information Storage and Management, 1990
Advanced multimedia applications call for integrated database system support for the management o... more Advanced multimedia applications call for integrated database system support for the management o f m ultimedia data. Traditional database management systems do not provide appropriate concepts and services for the integrated modeling, management, and interactive presentation of multimedia data. Our approach t o wards a multimedia database management system o ers presentation independence to applications, which is in line with traditional database system services like data independence and multiuser support. This new service is realized by the integration of appropriate concepts for continuous object management, the representation and presentation of multimedia data, and the execution of interactive end-user presentations into an open objectoriented database system. The resulting multimedia database system consists of database clients for the interactive presentation of multimedia data, which c a n b e adapted to particular needs of applications, and a database server for the e cient management of and access to multimedia data. 2 Chapter 1 dependent (continuous). We follow the de nition of 27] and refer with the term multimedia application to those applications which include both timedependent and time-independent media types. When looking at the di erent t ypes of multimedia applications one can nd different c haracteristics with regard to the challenging problems. In the following we give examples of some multimedia applications with interesting properties relevant in the framework of our work. With Video-On-Demand (VOD) applications users access video information from one or more remote servers. Recent d e v elopments for VOD systems support to a high degree the time-dependent presentation of a single media type, at the same time they neglect the editing, capturing, and modeling of single media types as well as multimedia compositions. VOD applications show l o w complexity with respect to presentation functionality as only videos are retrieved from the server and continuous data are delivered uni-directionally to the clients. At the same time VOD applications need high-performance storage and networking systems due to the high data volume of time-dependent m e d i a types. Another class of applications are computer games. They are based on interactivity b e t ween the user and the computer and can show high complexity. Games can be played locally or remotely by one or more players. Interactive games use branching techniques or advanced algorithms for interactivity 2 7 ]. Games are`custom made' and lay emphasis on the idea behind the game, the behavior of the interface, stability, and robustness. Video conferencing applications focus on real-time communication aspects and live synchronization of video and audio streams. The synchronization is in exible as these applications have to reproduce the data streams at a target system di erent from the source where the streams are captured. Video conferencing is concerned only with tightly coupled continuous video and audio streams. The realization of advanced video conferencing technology is to a high degree dependent on the development o f n e t working technology. Multimedia applications such as computer-based training, learning programs, and electronic encyclopedias require complex content modeling and speci c presentation techniques reconciled with individual user needs. This also applies to home shopping, ticket reservation, and electronic product catalogues. These applications use both discrete and continuous media types. They focus on the interactive presentation of multimedia information and are reasonable only in a m ulti-user environment i n w h i c h s e v eral users have access to the multimedia
2009 IEEE International Conference on Automation Science and Engineering, 2009
VLDB 2007 is the premier international forum for database researchers, vendors, practitioners, ap... more VLDB 2007 is the premier international forum for database researchers, vendors, practitioners, application developers, and users. We are looking forward to an exciting conference, discussing original results on all aspects of data management as well as panels, tutorials, and demonstrations that will present the most critical issues and views on practical leading-edge database technology, applications, and techniques. VLDB conferences have become a celebrity seat for co-located workshops on topics related to data management. Continuing this tradition VLDB 2007 also hosts a series of workshops that cover important aspects in the thematic context of data bases.
Proceedings RIDE '96. Sixth International Workshop on Research Issues in Data Engineering
Page 1. History Merging as a Mechanism for Concurrency Control in Cooperative Environments* Jurge... more Page 1. History Merging as a Mechanism for Concurrency Control in Cooperative Environments* Jurgen Wasch and Wolfgang Klas Integrated Publication and Information Systems Institute (GMD-IPSI) GMD - German National ...
Introduction and Motivation Applications very often have to handle multimedia data. They have to ... more Introduction and Motivation Applications very often have to handle multimedia data. They have to process, manipulate, present, audio, video, graphics, images, text, and combinations of these media types. One characteristics is that multimedia information often constitutes a huge amount of data. For example, 500 pages of text correspond to about 1 MB data, 500 images of JPEG compressed data amount in about 0.2 GB, 5 minutes of CD-DA quality audio amount in about 53 MB, 5 minutes of PAL-coded video corresponds to about 6.6 GB, and 5 minutes HDTV-coded video is in the order of 30 GB. For that very reason it is often necessary to have the multimedia data managed by a dedicated multimedia storage system. There are several approaches to the management of multimedia data by means of a database system [1]. One can distinguish between approaches which exploit traditional database technology without any adaptations or extensions of the conventional databa
Continuous delivery of media streams like video over IP networks so far is mainly handled by comm... more Continuous delivery of media streams like video over IP networks so far is mainly handled by commercial approaches that deliver the stream forward-oriented in their own proprietary format. Though some existing streaming technologies are able to adapt to varying bandwidths, they do not provide smooth reactions to user interactions with the continuous stream. We have developed the MPEG-L/MRP strategy, an adaptive prefetching algorithm for the MPEG-1 video format in combination with an intelligent buffering technique that allows for smooth and quick reactions to user interactions with the stream. With L/MRP [12] an approach already has been presented to deliver and buffer homogeneous continuous data streams like Motion-JPEG with special focus on fast reaction to user interactions. In contrast, the MPEG-1 encoding with its different frame types and the dependencies between frames opens the door to a more �ne-grained adaptation of the continous stream. However, the complexity of MPEG-1 c...
Proceedings of the 2020 2nd International Electronics Communication Conference, 2020
Blockchain systems make use of the Internet infrastructure to connect thousands of nodes in peer-... more Blockchain systems make use of the Internet infrastructure to connect thousands of nodes in peer-to-peer (P2P) networks. These connected nodes form complex ecosystems encompassing various technologies that collaborate to offer millions of users distributed, decentralized, secure, and read-only data stores. With the proliferation of various private and public platforms and applications that are built on top of blockchain technology, rich sources of several types of simple or complex datasets have been created. Consequently, new requirements for managing these rich data sources, integrating them with their hosting environment, and making them discoverable have emerged. Fulfilling these requirements calls for extending the architecture of current blockchain systems by adding different layers that offer dedicated services for handling the data and allowing for integrating the blockchain-based platforms and applications with other systems, including Web-based applications. In this paper, we present a novel approach aiming at extending the architecture of current blockchain systems by adding new service layers for processing the data and offering new services to provide a bridge between blockchain systems and Web-based external applications enabling them to query, retrieve, and access the datasets managed by robust permission-based access control.
Establishing a standard like Dublin Core is like building a bridge. It makes exchange possible. F... more Establishing a standard like Dublin Core is like building a bridge. It makes exchange possible. Fittingly, the Dublin Core conference 2008 is taking place in Berlin, which is often called a bridge between Western and Eastern Europe. This event reaches even beyond Europe, with registered participants from nations all over the world such as United States, South Africa, Japan and New Zealand. This year's conference will focus on metadata for social and semantic applications. For the first time, alongside the English tutorials there will be tutorials in German, prepared and presented by students from the University of Applied Sciences Potsdam. After three days of plenary as well as parallel sessions the conference will close on Friday with four different seminars focussing on interoperability and metadata vocabularies. Organizing such a conference would be impossible without the invaluable help of the following six organizations: the Competence Centre for Interoperable Metadata (KIM), the Max Planck Digital Library (MPDL), the Göttingen State and University Library (SUB), the German National Library (DNB), Humboldt-Universität zu Berlin (HU Berlin) and the Dublin Core Metadata Initiative (DCMI). For the funding we would like to thank the German Research Foundation (DFG) and the Federal Ministry of Education and Research (BMBF). Additionally we would like to thank Elsevier, the Common Library Network GBV, IBM, OCLC and Sun Microsystems for their generous sponsoring. Last but not least, the conference is supported by Wikimedia Deutschland, local support community of Wikipedia, the well-known online encyclopedia. We are sure that this year's conference will serve as a bridge between the participants and their knowledge, ideas and visions. With sincere wishes for a productive conference, Heike Neuroth Niedersächsische Staats-und Universitätsbibliothek Göttingen on behalf of the DC-2008 Host Organisation Committee The DC2008 proceedings represented in the following pages are the end-result of a long process that includes the submission of papers, reports, and posters; reviewing the submissions; organizing the accepted work among themes; and reviewing and formatting the final copies of the accepted works for publication in these proceedings. The process required the input of all members of the Program Committee and the Publications Committee. As conference Co-Chairs, we'd like to thank and acknowledge the efforts of the members of both of these committees, and, in particular, the outstanding and tremendous efforts of
Welcome to the 9th ACM Multimedia Conference, held Sept. 30-Oct.5, 2001 in Ottawa, Ontario, the c... more Welcome to the 9th ACM Multimedia Conference, held Sept. 30-Oct.5, 2001 in Ottawa, Ontario, the capital city of Canada. This beautiful city is often called "Silicon Valley North" because of the high concentration of major telecommunications and software companies, such as NORTEL, ALCATEL, CISCO, MITEL, COREL, COGNOS, JDS Uniphase, Entrust and many others. The conference complements this setting by presenting and exploring technological and artistic advancements in multimedia. Technical issues, theory and practice, artistic and consumer innovations will bring together researchers, artists, developers, educators, performers, and practitioners of multimedia. This conference is sponsored by NTT, ALCATEL, HP, Fuji-Xerox Palo Alto Laboratory, the Association for Computing Machinery (ACM) and its special interest groups SIGMM, SIGGRAPH, and SIGCOMM.Brigitte Kerherve did a tremendous job of selecting three outstanding workshops on emerging topics. Tamer Ozsu organized an exciting plenary panel and Ketan Mayer-Patel did again a wonderful job of organizing this year's doctoral symposium. Vincent Ofia did a splendid job in chasing the authors and organizing the papers. Roger Price has been working on the electronic proceedings since 1997.
Existing multimedia streaming technologies offer no specific support for user interaction like ju... more Existing multimedia streaming technologies offer no specific support for user interaction like jumping to bookmarks in a video, or switching to reverse play. When the users, e.g., jump to a bookmark, the player requests frames for the new presentation point from the server and resumes playing only when the data has arrived. Our solution for this problem is the client prefetching the buffering strategy, MPEG-L/MRP, that ensures that the frames which are needed for a response to a possible user interaction are already in the client's buffer, which leads to qucik and smooth reaction to user interactions. In case of variable bandwidth, our MPEG-1 streaming approach selects only a subset of all frames to be fetched from the server and supports a smooth presentation at a reduced frame rate with correct timelines.The technical demonstration shows the interactive streaming of MPEG-videos and illustrates our buffering and prefetching strategy.
With the emergence of cooperative applications it turned out that traditional transaction con- ce... more With the emergence of cooperative applications it turned out that traditional transaction con- cepts are not suitable for these scenarios. Isola- tion of transactions, as guaranteed by the ACID transaction properties, contradicts the need of cooperation between users. In this paper, we propose a cooperative activity model that pro- vides transactional properties suitable for coop- erative scenarios. Each user participating
Mobile devices are becoming more and more important in the context of e-learning. This requires a... more Mobile devices are becoming more and more important in the context of e-learning. This requires appropriate models for structuring and delivering content to be used on various devices. Different technical characteristics of devices as well as different needs of learners require specific approaches. In this paper we propose a model for structuring content that allows rendering for different devices like Notebooks, PDAs, and Smartphones as well as presentation of the content in different levels of details according to didactic concepts like case study, definition, example, interaction, motivation, directive. This approach allows adaptation of content (device, granularity of content, content selection based on didactic concepts) at run time to specific needs in a particular learning situation. The approach realized in the joint MobiLearn project of several universities in Austria shows high acceptance by students during an initial pilot application.
Transaction Management Support for Cooperative Applications, 1998
ABSTRACT This chapter describes the TRANSCOOP cooperative transaction model CoACT, and its underl... more ABSTRACT This chapter describes the TRANSCOOP cooperative transaction model CoACT, and its underlying paradigm of cooperative work. As motivated in Chapter 4 new application areas of the transaction concept impose new requirements on transaction models. In all of the discussed application areas there is a need to support the cooperation of human actors engaged in common tasks and working towards a common goal. a transaction model supporting cooperation should make the sharing and exchange of information among co-workers as natural as possible while still preserving a notion of consistency.
Proceedings of the seventh ACM international conference on Multimedia (Part 1) - MULTIMEDIA '99, 1999
Adaptation techniques for multimedia presentations are mainly concerned with switching between di... more Adaptation techniques for multimedia presentations are mainly concerned with switching between different qualities of single media elements to reduce the data volume and by this to adapt to limited presentation resources. This kind of adaptation, however, is limited to an inherent lower bound, i.e., the lowest acceptable technical quality of the respective media type. To overcome this limitation, we propose cross-media adaptation in which the presentation alternatives can be media elements of different media type, even different fragments. Thereby, the alternatives can extremely vary in media type and data volume and this enormously widens the possibilities to efficiently adapt to the current presentation resources. However, the adapted presentation must still convey the same content as the original one, hence, the substitution of media elements and fragments must preserve the presentation semantics. Therefore, our cross-media adaptation strategy provides models for the automatic augmentation of multimedia documents by semantically equivalent presentation alternatives. Additionally, during presentation, substitution models enforce a semantically correct information flow in case of dynamic adaptation to varying presentation resources. The cross-media adaptation strategy allows for flexible reuse of multimedia content in many different environments and, at the same time, maintains a semantically correct information flow of the presentation.
ICMI 2012 Chairs' Welcome Welcome to Santa Monica and to the 14 th edition of the International C... more ICMI 2012 Chairs' Welcome Welcome to Santa Monica and to the 14 th edition of the International Conference on Multimodal Interaction, ICMI 2012. ICMI is the premier international forum for multidisciplinary research on multimodal human-human and human-computer interaction, interfaces, and system development. We had a record number of submissions this year: 147 (74 long papers, 49 short papers, 5 special session papers and 19 demo papers). From these submissions, we accepted 15 papers for long oral presentation (20.3% acceptance rate), 10 papers for short oral presentation (20.4% acceptance rate) and 19 papers presented as posters. We have a total acceptance rate of 35.8% for all short and long papers. 12 of the 19 demo papers were accepted. All 5 special session papers were directly invited by the organizers and the papers were all accepted. In addition, the program includes three invited Keynote talks. One of the two novelties introduced at ICMI this year is the Multimodal Grand Challenges. Developing systems that can robustly understand human-human communication or respond to human input requires identifying the best algorithms and their failure modes. In fields such as computer vision, speech recognition, and computational linguistics, the availability of datasets and common tasks have led to great progress. This year, we accepted four challenge workshops: the AudioVisual Emotion Challenge (AVEC), the Haptic Voice Recognition challenge, the D-META challenge and Brain-Computer Interface challenge. Stefanie Telex and Daniel Gatica-Perez are co-chairing the grand challenge this year. All four Grand Challenges will be presented on Monday, October 22 nd , and a summary session will be happening on Wednesday, October 24 th , afternoon during the main conference. The second novelty at ICMI this year is the Doctoral Consortium-a separate, one-day event to take place on Monday, October 22nd, co-chaired by Bilge Mutlu and Carlos Busso. The goal of the Doctoral Consortium is to provide Ph.D. students with an opportunity to present their work to a group of mentors and peers from a diverse set of academic and industrial backgrounds and institutions, to receive feedback on their doctoral research plan and progress, and to build a cohort of young researchers interested in designing multimodal interfaces.
In object-oriented programming languages, multiple-dispatching provides increased expressive powe... more In object-oriented programming languages, multiple-dispatching provides increased expressive power over single-dispatching by guiding method lookup using the values of all arguments instead of the receiver only. There have been several programming languages supporting this mechanism and they demonstrate its usefulness. However, efficient implementation of multi-methods is still critical with regard to its success as a standard. In this paper, we present a new mechanism for implementing multi-methods dynamic lookup based on automaton techniques. Analysis and experimental results show that our strategy is time and space efficient. The presented result can provide the basis for designing new object-oriented paradigms based on multi-methods. 1. the first argument can be understood as the method receiver.
In this paper, we outline the features of a knowledge-based retrieval interface MERIT (Multimedia... more In this paper, we outline the features of a knowledge-based retrieval interface MERIT (Multimedia Extensions of Retrieval Interaction Tools), and VODAK, an object-oriented DBMS suitable for multimedia data. MERIT offers access to a subset of the CORDIS databases with data about European research programs, projects, and consortia in the field of information technology. The system features graphical presentations of retrieval results, employs interactive maps for geographical data, and provides scanned-in documents, e.g. photos of contact persons. The database management system functionality of VODAK is extended such that it treats multimedia data, like text, audio, or video, as an integral part of the databases. Furthermore VODAK is an extendible database management system which allows to integrate information from heterogeneous and distributed resources.
Multimedia Information Storage and Management, 1990
Advanced multimedia applications call for integrated database system support for the management o... more Advanced multimedia applications call for integrated database system support for the management o f m ultimedia data. Traditional database management systems do not provide appropriate concepts and services for the integrated modeling, management, and interactive presentation of multimedia data. Our approach t o wards a multimedia database management system o ers presentation independence to applications, which is in line with traditional database system services like data independence and multiuser support. This new service is realized by the integration of appropriate concepts for continuous object management, the representation and presentation of multimedia data, and the execution of interactive end-user presentations into an open objectoriented database system. The resulting multimedia database system consists of database clients for the interactive presentation of multimedia data, which c a n b e adapted to particular needs of applications, and a database server for the e cient management of and access to multimedia data. 2 Chapter 1 dependent (continuous). We follow the de nition of 27] and refer with the term multimedia application to those applications which include both timedependent and time-independent media types. When looking at the di erent t ypes of multimedia applications one can nd different c haracteristics with regard to the challenging problems. In the following we give examples of some multimedia applications with interesting properties relevant in the framework of our work. With Video-On-Demand (VOD) applications users access video information from one or more remote servers. Recent d e v elopments for VOD systems support to a high degree the time-dependent presentation of a single media type, at the same time they neglect the editing, capturing, and modeling of single media types as well as multimedia compositions. VOD applications show l o w complexity with respect to presentation functionality as only videos are retrieved from the server and continuous data are delivered uni-directionally to the clients. At the same time VOD applications need high-performance storage and networking systems due to the high data volume of time-dependent m e d i a types. Another class of applications are computer games. They are based on interactivity b e t ween the user and the computer and can show high complexity. Games can be played locally or remotely by one or more players. Interactive games use branching techniques or advanced algorithms for interactivity 2 7 ]. Games are`custom made' and lay emphasis on the idea behind the game, the behavior of the interface, stability, and robustness. Video conferencing applications focus on real-time communication aspects and live synchronization of video and audio streams. The synchronization is in exible as these applications have to reproduce the data streams at a target system di erent from the source where the streams are captured. Video conferencing is concerned only with tightly coupled continuous video and audio streams. The realization of advanced video conferencing technology is to a high degree dependent on the development o f n e t working technology. Multimedia applications such as computer-based training, learning programs, and electronic encyclopedias require complex content modeling and speci c presentation techniques reconciled with individual user needs. This also applies to home shopping, ticket reservation, and electronic product catalogues. These applications use both discrete and continuous media types. They focus on the interactive presentation of multimedia information and are reasonable only in a m ulti-user environment i n w h i c h s e v eral users have access to the multimedia
2009 IEEE International Conference on Automation Science and Engineering, 2009
VLDB 2007 is the premier international forum for database researchers, vendors, practitioners, ap... more VLDB 2007 is the premier international forum for database researchers, vendors, practitioners, application developers, and users. We are looking forward to an exciting conference, discussing original results on all aspects of data management as well as panels, tutorials, and demonstrations that will present the most critical issues and views on practical leading-edge database technology, applications, and techniques. VLDB conferences have become a celebrity seat for co-located workshops on topics related to data management. Continuing this tradition VLDB 2007 also hosts a series of workshops that cover important aspects in the thematic context of data bases.
Uploads
Papers by Wolfgang Klas