Papers by Milan Trifunovic
International Journal on Artificial Intelligence Tools, 2014
Recognizing topological analogy between the parts of semantic network seems to be very important ... more Recognizing topological analogy between the parts of semantic network seems to be very important step in the process of semantic categorization and interpretation of data that are embedded into the semantic network. Considering the semantic network as a set of graphs, recognition of topological analogy between the parts of semantic network can be treated as maximum common subgraph problem which falls in the group of exact graph matching problems. In this paper authors propose a new algorithm for maximum common subgraph detection aimed to a specific semantic network called Active Semantic Model (ASM). This semantic network can be represented as the set of labeled directed multigraphs with unique node labels. The structure of these graphs is specific because associations or edges are labeled with several attributes and some of them are related to nodes connected by edge. That kind of association-oriented structure enables associations or edges to play key role in the process of semant...
The current major scaffold design concepts for bone tissue recovery are characterized by labyrint... more The current major scaffold design concepts for bone tissue recovery are characterized by labyrinthine design. Their main shortcomings are low level of permeability for new growing tissue, poor design adaptability in regard to particular anatomy and required biomechanical conditions during recovery, as well as very demanding post processing after free form fabrication. In contrast to the most of the existing solutions, latticed scaffold design does not try to imitate the trabecular structure and rejects the labyrinthine concept. It is characterized by simple 3D latticed support structure, which provides a high level of permeability for the new growing tissue cells, and in the same time a proper level of bio-adhesiveness. In addition, its design is easy to manage in order to make it follow the particular anatomical shape and at the same time provide the required elastic properties and structural strength. The paper presents a part of design concept proving process, which is related to...
Computer Science and Information Systems, 2015
A procedure for creation of subject specific finite element (FE) models of human tibia is describ... more A procedure for creation of subject specific finite element (FE) models of human tibia is described in the paper. Model geometry and material properties are based on medical images, obtained by computed tomography (CT) scanning. The most important steps of the procedure are: extraction of polygonal model from medical images, creation of surface model based on polygonal model and creation of FE model. An important step in subject specific FE model creation is assignment of material properties, which should also be subject specific. To achieve this goal, material properties were assigned to FE model by means of automatic mapping of CT numbers onto FE models, based on correlation between bone density and elastic properties of bone material. Optimal mesh density was established through convergence checks, performed on a series of FE tibia models of growing mesh density. The paper also describes a preliminary analysis of a created FE model, which was performed in order to check model int...
In this paper the method of semantic network analysis which enables semantic network data categor... more In this paper the method of semantic network analysis which enables semantic network data categorization is presented. The main goal of the network analysis is determination of the similarity of the semantic network associations based on their attribute values. The method allows highly efficient semantic categorization of new concepts, which does not depend on pre-planned inputs and predefined inference rules. Also, the method allows different semantic interpretations of the same concept in different semantic contexts. As a specific example for demonstration of the semantic categorization process, a part of mold manufacturing workflow is chosen.
Artificial Intelligence for Engineering Design, Analysis and Manufacturing, 2015
ABSTRACT One of the biggest challenges associated with design and digital reconstruction of free ... more ABSTRACT One of the biggest challenges associated with design and digital reconstruction of free forms comes from uniqueness and unrepeatability of these shapes. During digital reconstruction of these forms, the designer has to choose the right set of geometric features and then compose them in a way that will enable the most accurate reconstruction of the geometry. While doing this, the designer primarily relies on personal experience gained through work with free-form objects of similar geometry. In our opinion, the analysis of free-form objects geometry should rely upon semantic interpretation of their geometric and other features, and the greatest challenge of automation of digital reconstruction and free-form object design in general is closely related to automation of semantic interpretation of geometric and other free-form object features. In this paper, a case of chest bone implant digital reconstruction is presented, where a new semantic model called the active semantic model was used for modeling the meaning of geometric elements, that is, the semantic features of a free-form object. The active semantic model and its analogy-based reasoning algorithms have shown themselves as applicable for the automation of semantic interpretation of the unique, unrepeatable, and unpredictable forms of chest bone. Moreover, this semantic model showed the potential to help automate selecting and composing of geometric features for efficient digital reconstruction of the geometry of free forms.
This paper deals with the level of detail that is necessary for representation of tread pattern i... more This paper deals with the level of detail that is necessary for representation of tread pattern in finite element tire models. Different methods for creation of tire tread mesh are systematized by two different criteria: the most common approaches and the finite element analysis type. Some of the representative approaches found in literature are given in more detail and their advantages and disadvantages discussed. An example from author’s experience, which describes the creation of finite element tire model with detailed tread for steady-state rolling analysis, is presented. The paper also brings a head-to-head comparison of the response of simplified and detailed tread tire models, subjected to a range of finite element analyses, from footprint analysis at static loading conditions to steady-state rolling cornering analysis.
International Journal on Artificial Intelligence Tools, 2014
ABSTRACT Recognizing topological analogy between the parts of semantic network seems to be very i... more ABSTRACT Recognizing topological analogy between the parts of semantic network seems to be very important step in the process of semantic categorization and interpretation of data that are embedded into the semantic network. Considering the semantic network as a set of graphs, recognition of topological analogy between the parts of semantic network can be treated as maximum common subgraph problem which falls in the group of exact graph matching problems. In this paper authors propose a new algorithm for maximum common subgraph detection aimed to a specific semantic network called Active Semantic Model (ASM). This semantic network can be represented as the set of labeled directed multigraphs with unique node labels. The structure of these graphs is specific because associations or edges are labeled with several attributes and some of them are related to nodes connected by edge. That kind of association-oriented structure enables associations or edges to play key role in the process of semantic categorization and interpretation of data. Furthermore, this kind of structure enables modeling semantic contexts in a form of semantically designated graphs (of associations). Proposed algorithm is capable of recognizing simultaneously maximum common subgraph of input graph and each of the graphs representing different contexts in ASM semantic network.
Thermal Science, 2010
Page 1. CO2 REDUCTION OPTIONS IN CEMENT INDUSTRY THE NOVI POPOVAC CASE by Gordana M. STEFANOVI]... more Page 1. CO2 REDUCTION OPTIONS IN CEMENT INDUSTRY THE NOVI POPOVAC CASE by Gordana M. STEFANOVI] * , Goran D. VU^KOVI], Mirko M. STOJILJKOVI], and Mi lan B. TRIFUNOVI] Fac ulty of Me chan i cal En gi neer ing, Uni ver sity of Ni{, Ni{, Ser bia ...
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188 J SCI IND RES VOL 69 MARCH 2010 Journal of Scientific & Industrial Research Vol. 69, March 20... more 188 J SCI IND RES VOL 69 MARCH 2010 Journal of Scientific & Industrial Research Vol. 69, March 2010, pp. 188-193 ... *Author for correspondence E-mail: [email protected]. rs ... Exception detection in business process management systems
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Tissue engineering (TE) is a relatively new field in biomedical engineering that is receiving muc... more Tissue engineering (TE) is a relatively new field in biomedical engineering that is receiving much attention among the scientific community and the general public. One approach to promote the regeneration of new tissue is application of scaffolds as a template to guide the proliferation, growth and development of cells appropriately. Scaffolds internal structure plays an important role for this purpose. The process of creating customized scaffolds includes definition of the internal architecture suitable for the development of the desired tissue and creation of external geometry to match the geometry of fragment being replaced. This paper analyzes the approaches which aim to simplify and automate the process of creating customized scaffolds.
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Papers by Milan Trifunovic