Tibor Szkaliczki

• Institute for Computer Science and Control, Hungarian Academy of Sciences

Water Management Digital Knowledge Repository presented in this article is unique in the sense that it helps to preserve the heritage of water profession and facilitates access to the latest information for a wider public. This is particularly important in a country where water-related disasters have not only threatened the people in the past but u...

The objective of the paper is to shed light on the importance of the digital presentation of religious heritage and present the multimedia documentation of a chapel developed within the “Oltári Múlt” (“Sacred Past”, in Hungarian) project. It aims to preserve the values of medieval churches through video documentation. Walls and stones come alive fo...

eHealth services require continuous data streaming and a stable level of quality of service. However, wireless network connections can be characterized by variable bandwidths. This requires continuous adaptation of systems, including adapting the bit rates of data streamed by sensors. Assigning appropriate rates to the data represents a main task i...

The paper presents the special features of the virtual walk developed in Bulgarian - Hungarian co-operation for the famous Bulgarian church named as Church of Nativity in Arbanasi. The virtual walk is created from high-resolution interactive spherical panorama pictures. The virtual walk is integrated with the Bulgarian Iconographical Digital Librar...

This chapter presents a novel learning approach for studying ancient Bulgarian history, civilization, and their cultural heritage, namely the Thracian civilization, through storytelling and serious game combinations. The chapter also provides an overview of serious educational games, digital storytelling, and game development tools that can be used...

Educational competitions belong to the most effective ways for motivating students to gain new knowledge on a specific domain. They can even bring scientific heritage closer to the next generation. The coronavirus pandemic put the organisation of competitions at risk. This paper presents how digital tools could help in organising educational compet...

In association with UNESCO, the world’s scientific community commemorated in 2019 the 100th anniversary of the death of Roland Eötvös, a worldfamous Hungarian polyhistor. This paper presents various multimedia tools and services applied in the commemorative year to preserve and present his multifold scientific and societal heritage on Web and mobil...

Reverberating on the social expectations connected to the cultural heritage, international cooperation was launched in order to communicate a lively image of archaeological research and to raise awareness for the importance of fragile monumentalized landscapes. The EU funded Iron-Age-Danube project resulted in several working camps, scientific and...

Serious educational games provide a novel way to transfer knowledge on cultural heritage, which can especially attract young people by using interactive multimedia technology. The paper presents a new flexible tool for developing, managing and presenting games. This server-based solution can facilitate the game development by applying game template...

The paper presents the application of panorama pictures for presenting cultural heritage sites in an attractive way. High-resolution interactive spherical panorama pictures of several famous locations (churches, museum, bridges) in Veliko Tarnovo region, Bulgaria, and presentation tools on both-mobile application and web pages, were created in a co...

The paper introduces an ecosystem of digital libraries and mobile applications for presenting Bulgarian cultural and science assets. The digital libraries concerned represent valuable sources of cultural heritage and related scientific results. They include the Bulgarian Iconographical Digital Library (BIDL), the BellKnow multimedia archive on bell...

The paper presents the application of panorama pictures for presenting cultural heritage sites in an attractive way. High-resolution interactive spherical panorama pictures of several famous locations (churches, museum, bridges) in Veliko Tarnovo region, Bulgaria, and presentation tools on both – mobile application and web pages, were created in a...

The paper presents a guided smartphone walk (Attila József Literary Walk) and its latest supplements, based in district 9 of Budapest. The thematic guided walk developed 2 years ago covers the scenes of the childhood of the poet Attila József. Several interactive games related to the life of the poet were developed and integrated into the applicati...

The paper introduces the mobile presentation of Bulgarian bells as the newest developments in the GUIDE@HAND mobile application family. The integration of the Web based archive on the Bulgarian bells (Multimedia Fund "BellKnow") and the mobile application family made it possible that information on bells can be presented on mobile devices. A standa...

The paper presents how the VR technology helps tourists in selecting their destinations. The current state-of-the-art service is the result of systematic development activities which has become available in the tourist information office (Tourinform) in the town of Miskolc. The visitors can discover the local sights either on the Web site of the to...

The paper introduces the mobile presentation of Bulgarian bells as the newest developments in the GUIDE@HAND mobile application family. The integration of the Web based archive on the Bulgarian bells (Multimedia Fund “BellKnow”) and the mobile application family made it possible that information on bells can be presented on mobile devices. A standa...

The paper presents the newest developments in integrating Bulgarian Iconographical Digital Library (BIDL) and the tourist mobile application family named as GUIDE@HAND for supporting the learning process of East Christian Iconographical Art. Learning content is delivered through the BIDL—a web-based environment for registration, documentation, acce...

The general clustering algorithms do not guarantee optimality because of the hardness of the problem. Polynomial-time methods can find the clustering corresponding to the exact optimum only in special cases. For example, the dynamic programming algorithm can solve the one-dimensional clustering problem, i.e., when the items to be clustered can be c...

The paper presents the newest developments in integrating Bulgarian Iconographical Digital Library (BIDL) and the tourist mobile application family named as (GUIDE@HAND). The integration made it possible for collections to be created by the user at the BIDL Web page and then downloaded to the GUIDE@HAND Veliko Tarnovo application by using QR codes....

This paper demonstrates an approach for technology-enhanced learning, combining analysis, collaborative work, mobile learning (m-learning for short), discussion, and learning-by-authoring approaches in order to achieve more active participation of the learners during the reception of knowledge and to stimulate their creative thinking. The learners...

The paper presents an offline mobile application (INFO@HAND) providing information about the DIPP conference series for conference participants and scientists interested in the conference scope and topics. In order to support the participants of the international conference, the application contains an event calendar, provides information about the...

The practical significance of bio-inspired, self-organising methods is rapidly increasing due to their robustness, adaptability and capability of handling complex tasks in a dynamically changing environment. Our aim is to examine an artificial hormone system that was introduced in order to deliver multimedia content in dynamic networks. The artific...

This paper introduces SEAHORSE (SElforganizing Artificial HORmone SystEm), a middleware that builds upon an artificial hormone system for search and delivery of information units. SEAHORSE is a generalization of an artificial hormone algorithm where information units are requested by network nodes via emitting a an artificial hormone which is propa...

The paper presents a mobile application introducing the heritage values in historical cemeteries. The application is developed for both the experts of the domain and people merely interested in the topic. Guided walks within the GUIDE@HAND audio tourist guide introduce several cemeteries of Europe. In order to support the participants of the intern...

In medical endoscopy more and more surgeons archive the recorded video streams in a long-term storage. One reason for this development, which is enforced by law in some countries, is to have evidence in case of lawsuits from patients. Another more practical reason is to allow later inspection of previous procedures and also to use parts of such vid...

The following paper presents an application of QR code marking of digital iconographical collections for their outdoor mobile access and exploring through the GUIDE@HAND audio tourist guide.

The eLearning Department of the Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) has become a key player of the domestic eLearning market in recent years. This role is based on its multimedia technology experience in different areas of eLearning, including research, expertise, product and content development. T...

Nowadays an intensive diversification can be experienced among the devices that can display multimedia content to the user. Typically, clients are unable to receive large audio-visual data volumes in original quality because of resource limitations and deficiency of terminal capabilities. The aim of media resource adaptation is to provide multimedi...

Self-organizing methods can efficiently search, route and replicate content in complex, dynamic networks. Furthermore, they make the assumption that decisions of the nodes of the networks rely only on local information and therefore the global optimum is not known. For evaluation purposes, however, it is important to compute the global optimum to s...

Nowadays an intensive diversification can be experienced among the devices that can display multimedia content to the user. Typically, clients are unable to receive large audio-visual data volumes in original quality because of resource limitations and deficiency of terminal capabilities. The aim of media resource adaptation is to provide multimedi...

In this paper the performance of layered piece-picking algorithms for Bittorrent-based peer-to-peer systems is evaluated and compared to traditional single layer solutions. In a Bittorrent-based peer-to-peer system, the piece-picking algorithm needs to ensure that the pieces of an audiovisual content are received in time to ensure smooth playback o...

The distribution of layered content over peer-to-peer networks becomes more important today as the users are consuming the content on terminals with various display capabilities and different network connections. For single-layer content distribution, the piece-picking algorithm only needs to ensure that content pieces are downloaded in time for di...

This paper introduces the piece selection problem that arises when streaming layered video content over peer-to-peer networks. The piece selection algorithm decides periodically which pieces to request from other peers (network nodes) for download. The main goal of the piece selection algorithm is to provide the best possible quality for the availa...

Planning Video-on-Demand (VoD) services based on the server architecture and the available equipment is always a challenging task. We created a formal model to support the design of distributed video servers that adapt dynamically and automatically to the changing client demands, network and host parameters. The model makes giving estimations about...

Presents a collection of slides from the author's conference presentation. Topics covered include: Motivation, Formal model, Simulation model, Performance study based on the simulation model, and Conclusions.

We plan to setup a VoD service built on an innovative multimedia server architecture which enables dynamic adaptation to the changing circumstances. The adaptation happens by replicating the server components and the stored videos based on real-time host and network monitoring and resource constraint analysis. In addition, the terminal capabilities...

In a distributed server architecture an obvious question is where to deploy the components. Host recommendation, which gives the answer, faces problems such as server selection, host deployment and, in case of multimedia servers, video replication. It is especially relevant for the Adaptive Distributed Multimedia Server (ADMS) which is dynamically...

Content adaptation is an important issue of multimedia frameworks in order to achieve universal multimedia access (UMA), i.e., to enable consumption of multimedia content independently of the given resource limitations, terminal capabilities, and user preferences. The digital item adaptation (DIA) standard, one of the core specifications of the MPE...

Multimedia services are becoming widespread over the Internet. Large amount of resources are needed to deliver multimedia data with high quality and it is a quite difficult task to set up and scale video servers to comply with expectations. We developed a formal frame model to support the design of distributed video servers, the evaluation of their...

In order to enable transparent and convenient use of multi- media content across a wide range of networks and devices, content adaptation is an important issue within multimedia frameworks. The so called Digital Item Adaptation (DIA) standard is one of the core concepts of the MPEG-21 frame- work that will support the adaptation of multimedia resou...

Content adaptation is an important issue of multimedia frameworks in order to achieve Universal Multimedia Access (UMA), that is, to enable consumption of individual multimedia content independently of the given resource limitations, terminal capabilities and user preferences. The Digital Item Adaptation (DIA) standard, one of the core specificatio...

This paper focuses on an approach for real-time metal extraction of x-ray images taken from modern x-ray machines like C-arms. Such machines are used for vessel diagnostics, surgical interventions, as well as cardiology, neurology and orthopedic examinations. They are very fast in taking images from different angles. For this reason, manual adjustm...

Computer and Automation Research Institute, Hungarian Academy of Sciences – further SZTAKI – has a really good and well-known international technology/research background. Because of this good track record SZTAKI has received the status of the EU Centre of Excellence in Information Technology and Automation. According to these experiences the staff...

Planning VoD services based on the server architecture and on the available equipment is always a challenging task. We created a mathematical frame model to support the design of distributed multimedia services. The model consists of a (1) static and a (2) dynamic part. The static part enables giving estimations about the available throughput. In t...

Multimedia services typically need not only huge resources but also a fairly stable level of Quality of Services. This requires server architectures that enable continuous adaptation. The Adaptive Distributed Multimedia Server (ADMS) of the University Klagenfurt is able to dynamically add and remove nodes to the actual configuration, thus realizing...

An incremental algorithm is proposed to dynamically place the proxies of the Adaptive Distributed Multimedia Server (ADMS) developed at the University Klagenfurt. In order to enhance the performance of the server, the proposed algorithm examines the suitable network nodes for hosting proxies. The main benefit of the algorithm is the capability to p...

The present article concentrates on the dogleg-free Manhattan model where hori- zontal and vertical wire segments are positioned on different sides of the board and each net (wire) has at most one horizontal segment. While the minimum width can be found in linear time in the single row routing, apparently there was no efficient algorithm to find th...

Gallai's classical result on interval packing can be applied in VLSI routing to find, in linear time, a minimum-width dogleg-free routing in the Manhattan model, provided that all the terminals are on one side of a rectangular [1]. Should the terminals appear on two opposite sides of the rectangular, the corresponding "channel routing problem" is N...

The present article concentrates on the dogleg-free Manhattan model where horizontal and vertical wire segments are positioned on different sides of the board and each net (wire) has at most one horizontal segment. Gallai's classical result on interval packing can be applied in VLSI routing to find, in linear time, a minimum-width dogleg-free routi...

Channel routing is one of the basic problems in VLSI routing. While the minimum width can be found in linear time in the single row routing problem, the complexity of the channel routing problem is not fully understood yet. A solution can be found, even in linear time, in the unconstrained model, but the complexity of determining the minimum width...

A kombinatorikus optimalizálás eszközeit (gráf- és matroidelméleti algoritmusok, bonyolultságelméleti vizsgálatok) alkalmaztuk villamosságtani és informatikai problémák megoldására, így konkrétan -- a nagybonyolultságú integrált áramkörök 2- és 3-dimenziós huzalozási kérdéseire (csatorna- vagy 'switchbox'-huzalozás, minimális összhosszúságú/terület...