Mariusz Trzaska

Mariusz Trzaska
Polish-Japanese Academy of Information Technology | PJWSTK · Software Engineering

PhD

About

27
Publications
3,530
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41
Citations
Additional affiliations
October 2000 - present
Polsko-Japonska Wyzsza Szkola Technik Komputerowych

Publications

Publications (27)
Article
The modern Web requires new ways for creating applications. We present our approach combining a web framework with a modern object-oriented database and a dedicated Integrated Development Environment (IDE). It makes it easier to develop web applications by rising the level of abstraction. In contrast to many existing solutions, where the business l...
Article
Full-text available
Introduction and Objectives: Many scoring systems in liver diseases use static values of liver function parameters. These parameters may change significantly in liver transplant (LTx) recipients over time due to various processes. The study was aimed at building a new model for survival prediction after LTx based on variability of selected paramete...
Conference Paper
Augmented Reality (AR) gains increased attention over the past few years. It becomes recognized as a valuable tool for a casual user and for a business/industry customer. One of the biggest problems of AR is lack of a common data protocol that would allow creating a data scheme independently of technology that will be used by the end user. This fac...
Conference Paper
Full-text available
Thanks to technology the world is getting smaller and smaller every day. We are moving towards the model in which we do not have to be in the same place where our employer is located. Remote, scattered teams are something that we encounter every day. In our research we explore methods and strategies that will allow increase efficiency of teamwork u...
Article
In our work, we have built models predicting whether a patient will lose an organ after a liver transplant within a specified time horizon. We have used the observations of bilirubin and creatinine in the whole first year after the transplantation to derive predictors, capturing not only their static value but also their variability. Our models ind...
Conference Paper
Full-text available
The modern Web requires new ways for creating applications. We present our approach combining a web framework with a modern object-oriented database. It makes it easier to develop web applications by rising the level of abstraction. In contrast to many existing solutions, where the business logic is developed in an object-oriented programming langu...
Conference Paper
Full-text available
We present a new version of the Smart Persistence Layer (SPLv2) which is a working prototype following our approach to modern data sources. Contrary to the most popular solutions, it does not use Object-Relational Mappers nor relational databases. This approach guarantees complete lack of the impedance mismatch. The new features of the SPLv2 concer...
Conference Paper
We present an approach to solve the impedance mismatch problem caused by incompatibility between two models: object-oriented and relational ones. We believe that it cannot be unraveled by creating new Object-Relational Mappers (ORMs) like most of the software industry does. It is caused by some inherent differences between those two worlds. In our...
Conference Paper
Full-text available
While in the traditional workflow processes the control flow is determined statically within process definitions, in declarative workflow processes the control flow is dynamic and implicit, determined by conditions that occur in the workflow data and the service environment. The environment consists of active objects, which play a double role. On t...
Article
Full-text available
Graphical User Interfaces (GUI) can be created using several approaches. Beside using visual editors or a manually written source code, it is possible to employ a declarative method. Such a solution usually allows working on a higher abstraction level which saves the developers’ time and reduces errors. The approach can follow many ideas. One of th...
Article
Full-text available
The paper presents motivations and technical assumptions of a prototype object-oriented declarative workflow management system that is developed and implemented at the Polish-Japanese Institute of Information Technology in Warsaw. The main assumption that differs this system from many similar systems is the possibility of dynamic changes of running...
Chapter
Full-text available
We have presented a Domain Specific Language called GCL. The purpose of the language is to facilitate creation of Graphical User Interfaces. Our research has been supported by the working implementation for the Java platform. However, utilized approach and design are generic enough to create the language for other platforms (like MS .NET and C#). T...
Conference Paper
Full-text available
Creating GUIs for data-intense application is a time consuming task. A promising approach, saving the developer’s time, assumes a declarative way of generating such interfaces. In this paper we present an extended version of our library called the senseGUI. Using simple annotations of the source code, the library is able to automatically generate c...
Conference Paper
Full-text available
ODRA (Object Database for Rapid Application development) is an object- oriented database management system provided as an integrated programming tool for building various business and administration applications, including centralized and distributed systems, Web applications, service buses, virtual repositories, P2P networks, and so on. The paper...
Conference Paper
Full-text available
Mavigator is a graphical querying and browsing tool dedicated to naive users (computer non-professionals). It allows them to retrieve and analyse information from various data sources, in particular, from object-oriented and XML-oriented databases, providing a corresponding wrapper is implemented. Mavigator key concepts related to information retri...
Conference Paper
Full-text available
We present Mavigator, a prototype of a graphical user interface to databases. The system is dedicated to naive users (computer non-professionals) and allows them to retrieve information from any data source, including object-oriented and XML-oriented databases. The system extends its core functionalities by the Active Extensions (AE) module, which...
Chapter
Full-text available
The retrieval capabilities of the visual information retrieval system Mavigator have been designed for a naive user, typically a computer nonprofessional. In contrast to retrieval engines on raw text (such as Google), Mavigator addresses structured data (e.g. XML repositories). For such data a query language is proper, however naive users cannot de...
Conference Paper
Full-text available
We present visual metaphors of Mavigator, a visual information retrieval system for Web-oriented database applications. The metaphors allow the naive users (computer non-professionals) to retrieve information from object-oriented databases in an easy and intuitive form. Novel features of Mavigator include coherent combination of a few paradigms: in...
Article
Structural Knowledge Graph Navigator (SKGN) supports end users of Web applications by simple means for ad hoc querying and browsing in an object-oriented database. The interface has been implemented within the European project ICONS. SKGN utilizes three core concepts: intentional navigation (in a schema graph), extensional navigation (in an object...
Conference Paper
Structural Knowledge Graph Navigator (SKGN) supports end users of Web applications by simple means for ad hoc querying and browsing in an object-oriented database. The interface has been implemented within the European project ICONS. SKGN utilizes three core concepts: intentional navigation (in a schema graph), extensional navigation (in an object...
Conference Paper
Full-text available
The old idea of navigation in a database is revisited with two essential changes: we address Web users rather than programmers and the navigation is accomplished as a visual metaphor. The Structural Knowledge Graph Navigator (SKGN) is a prototype implementation of this metaphor. It supports end users of Web applications by simple means for ad hoc q...
Article
Full-text available
The old idea of navigation in a database is revisited with two essential changes: we address Web users rather than programmers and the navigation is accomplished as a visual metaphor. The Structural Knowledge Graph Navigator (SKGN) is a prototype implementation of this metaphor. It supports end users of Web applications by simple means for ad hoc q...
Article
Full-text available
Structural Knowledge Graph Navigator (SKGN) supports end users of Web applications by simple means for ad hoc querying and browsing in an object-oriented database. The interface has been implemented within the European project ICONS. SKGN utilizes three core concepts: intentional navigation (in a schema graph), extensional navigation (in an object...
Article
Virtual Schemas are part of the visual information retrieval system called Mavigator. The system is dedicated to naive users (computer non-professionals) and allows them to retrieve information from any data source, in particular, from object- oriented and XML-oriented databases. A significant problem related to all browsing tools is a way of prese...

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Project (1)
Project
Working on methods that can upgrade ways of remote interaction and cooperation. Allows to make a easy to use AR session without any technical knowledge. System based on SaaS concept