Augustin Prodan - Academia.edu (original) (raw)

Papers by Augustin Prodan

Lecture Notes in Computer Science, 1999

Energies, 2019

The present study develops the influence of inclined border temperature variations on the isother... more The present study develops the influence of inclined border temperature variations on the isotherms, streamlines, and isoconcentrations for unsteady free convection in a trapezoidal region filled with the water-based nanofluid. The considered mathematical nanofluid approach was formulated based on the Buongiorno’s model. The set of governing partial differential equations formulated using non-dimensional primitive variables such as velocity, pressure, temperature, and nanoparticles concentration volume fraction was solved numerically using the finite element method for various magnitudes of control characteristics. It was revealed that control characteristics affected the liquid circulation and energy transport coefficients. The Nusselt number is a growing function of wave number, amplitude, and the Rayleigh number.

This paper presents a Java framework for designing and implementing intelligent and practical e-l... more This paper presents a Java framework for designing and implementing intelligent and practical e-learning tools, to be used by both the students and the teaching staff in their didactic and research activities, especially in a context of open learning. As the electronic technologies do not contain teaching methods and pedagogical characteristics, we have to simulate a high quality teaching-learning relation inside the e-course. Such a simulation must incorporate both the integrated knowledge of the best teachers and the best pedagogical strategies, obtaining this way an intelligent e-learning tool. At the same time, we prepare our e-courses based on practice and real world experiences, as the practice is essential in learning activities. An e-course consists of a set of e-learning scenarios, each e-learning scenario being generated by virtue of some well-defined learning objectives. To generate e-learning scenarios for a particular e-course, we have to create first a particular infra...

This paper presents a Java based e-learning framework for analyzing, processing and understanding... more This paper presents a Java based e-learning framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning. Relying on a colour imaging system, we use statistical methods in assessment of potential methodologies for noninvasive wound evaluation. The colour image processing methods have many advantages over traditional human methods in assessment of wounds. Computer based methods are objective, repeatable and with a large potential of processing. We build in Java models for various categories of wounds, due to aetiologies such as pressure, burn, chilblain, vascular insufficiencies, diabetic foot ulcer, venous leg ulcer and other chronic disease states. Bas...

Korean Journal of Computational & Applied Mathematics

Previous research has shown that the flow of patients around departments of geriatric medicine an... more Previous research has shown that the flow of patients around departments of geriatric medicine and ex-patients in the community may be modelled by the application of a mixed-exponential distribution. In this paper we considered a five-compartment model using a continuous-time Markov process to describe the flow of patients. Using a M/Ph/c queuing model, we present a way of optimizing the number of beds in order to maintain an acceptable delay probability at a sufficiently low level. Finally, we constructed a Java computer simulation, using data from St George’s Hospital, London.

Proceedings of the International Conference on Computational Science Part I, 2002

The paper focuses on a set of Java class libraries for stochastic modeling and simulation, create... more The paper focuses on a set of Java class libraries for stochastic modeling and simulation, created and implemented by the Department of Mathematics and Informatics from Iuliu Haţieganu University Cluj-Napoca. Previous research has shown that stochastic models are advantageous tools for representation of the real world activities. Due to actual spread of fast and inexpensive computational power everywhere in the world, the best approach is to model the real phenomenon as faithfully as possible, and then rely on a simulation study to analyze it. We approached the new bootstrapping methods, which are very useful in analyzing a simulation. Our aim is to implement bootstrapping strategies in software tools which will be used by both the teaching staff and the students in didactic and research activities, with the purpose to optimize the use of substances and reactants.

IFMBE Proceedings, 2009

This paper presents a numerical study of a diffusive free convection in a rectangular cavity fill... more This paper presents a numerical study of a diffusive free convection in a rectangular cavity filled with a porous medium. It is assumed that the left vertical wall is subject to a mixed boundary condition (Robin) and the right vertical wall is kept at a constant concentration, while the horizontal walls are adiabatic. The governing mass conservation, Darcy law and

2010 IEEE International Conference on Automation, Quality and Testing, Robotics (AQTR), 2010

This paper is devoted to investigate numerical optimization algorithms of the theory of deformabl... more This paper is devoted to investigate numerical optimization algorithms of the theory of deformable surfaces and to emphasize some of their computerized applications in medical image analysis and prosthetic surgery. After defining the 3D variational deformable model, both in static and dynamic form, an algorithm for finding the optimal deformable surface is presented, together with estimations for its approximation error and a condition for its convergence. Finally, a statistical modeling and a corresponding algorithm applied in surgery are presented.

The paper presents a Java framework for stochastic modelling and sim- ulation, used as an infrast... more The paper presents a Java framework for stochastic modelling and sim- ulation, used as an infrastructure to model and simulate real world activities, phe- nomena and processes, particularly in health care, patient monitoring and medical education. We modelled the flow of patients through medical units, considering both their arrivals and their stay in the hospital. Also, we implemented bootstrap- ping

Methodologies, Tools and New Developments for E-Learning, 2012

2010 Fourth International Conference on Digital Society, 2010

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify the main barriers to wound healing, such as tissue nonviable, infection, inflammation, moisture imbalance, or edge non-advancing. This framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. We make experiments for wound healing simulation using various treatments and compare the results with experimental observations. Our experiments are supported by XML based databases containing knowledge extracted from previous wound healing experiences and from medical experts' knowledge. Also, we rely on new paradigms of the Artificial Intelligence for creating e-learning scenarios to be used in a context of active learning, for wound image understanding. To implement the e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning.

ECMS 2006 Proceedings edited by: W. Borutzky, A. Orsoni, R. Zobel, 2006

The paper presents a Java framework for analysing and processing wound images, which are incorpor... more The paper presents a Java framework for analysing and processing wound images, which are incorporated in elearning tools, to be used by both the students and the teaching staff in their didactic and research activities. We implement in Java traditional methods and algorithms for analysing a digital picture of a wound from a specific distance, for identifying its boundaries and for calculating its area. We build in Java models for various categories of wounds, due to aetiologies such as pressure, burn, chilblain, vascular insufficiencies, diabetic foot ulcer, venous leg ulcer and other chronic disease states. Based on colour and texture analysis, we identify the main barriers to wound healing, such as tissue non-viable, infection, inflammation, moisture imbalance, or edge non-advancing. The Java framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. Also, we rely on new paradigms of artificial intelligence (Bayesian Inference, Case Based Reasoning and Intelligent Agents) for creating e-learning scenarios to be used in a context of active learning. To implement these e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content (data and documents). Proceedings 20th European Conference on Modelling and Simulation Wolfgang Borutzky, Alessandra Orsoni, Richard Zobel © ECMS, 2006 ISBN 0-9553018-0-7 / ISBN 0-9553018-1-5 (CD)

2010 Fourth UKSim European Symposium on Computer Modeling and Simulation, 2010

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify the main barriers to wound healing, such as tissue non-viable, infection, inflammation, moisture imbalance, or edge non-advancing. This framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. We make experiments for wound healing simulation using various treatments and compare the results with experimental observations. Our experiments are supported by XML based databases containing knowledge extracted from previous wound healing experiences and from medical experts' knowledge. Also, we rely on new paradigms of the Artificial Intelligence for creating e-learning scenarios to be used in a context of active learning, for wound image understanding. To implement the e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning.

2009 IEEE/ACS International Conference on Computer Systems and Applications, 2009

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify

Lecture Notes in Computer Science, 1999

Energies, 2019

The present study develops the influence of inclined border temperature variations on the isother... more The present study develops the influence of inclined border temperature variations on the isotherms, streamlines, and isoconcentrations for unsteady free convection in a trapezoidal region filled with the water-based nanofluid. The considered mathematical nanofluid approach was formulated based on the Buongiorno’s model. The set of governing partial differential equations formulated using non-dimensional primitive variables such as velocity, pressure, temperature, and nanoparticles concentration volume fraction was solved numerically using the finite element method for various magnitudes of control characteristics. It was revealed that control characteristics affected the liquid circulation and energy transport coefficients. The Nusselt number is a growing function of wave number, amplitude, and the Rayleigh number.

This paper presents a Java framework for designing and implementing intelligent and practical e-l... more This paper presents a Java framework for designing and implementing intelligent and practical e-learning tools, to be used by both the students and the teaching staff in their didactic and research activities, especially in a context of open learning. As the electronic technologies do not contain teaching methods and pedagogical characteristics, we have to simulate a high quality teaching-learning relation inside the e-course. Such a simulation must incorporate both the integrated knowledge of the best teachers and the best pedagogical strategies, obtaining this way an intelligent e-learning tool. At the same time, we prepare our e-courses based on practice and real world experiences, as the practice is essential in learning activities. An e-course consists of a set of e-learning scenarios, each e-learning scenario being generated by virtue of some well-defined learning objectives. To generate e-learning scenarios for a particular e-course, we have to create first a particular infra...

This paper presents a Java based e-learning framework for analyzing, processing and understanding... more This paper presents a Java based e-learning framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning. Relying on a colour imaging system, we use statistical methods in assessment of potential methodologies for noninvasive wound evaluation. The colour image processing methods have many advantages over traditional human methods in assessment of wounds. Computer based methods are objective, repeatable and with a large potential of processing. We build in Java models for various categories of wounds, due to aetiologies such as pressure, burn, chilblain, vascular insufficiencies, diabetic foot ulcer, venous leg ulcer and other chronic disease states. Bas...

Korean Journal of Computational & Applied Mathematics

Previous research has shown that the flow of patients around departments of geriatric medicine an... more Previous research has shown that the flow of patients around departments of geriatric medicine and ex-patients in the community may be modelled by the application of a mixed-exponential distribution. In this paper we considered a five-compartment model using a continuous-time Markov process to describe the flow of patients. Using a M/Ph/c queuing model, we present a way of optimizing the number of beds in order to maintain an acceptable delay probability at a sufficiently low level. Finally, we constructed a Java computer simulation, using data from St George’s Hospital, London.

Proceedings of the International Conference on Computational Science Part I, 2002

The paper focuses on a set of Java class libraries for stochastic modeling and simulation, create... more The paper focuses on a set of Java class libraries for stochastic modeling and simulation, created and implemented by the Department of Mathematics and Informatics from Iuliu Haţieganu University Cluj-Napoca. Previous research has shown that stochastic models are advantageous tools for representation of the real world activities. Due to actual spread of fast and inexpensive computational power everywhere in the world, the best approach is to model the real phenomenon as faithfully as possible, and then rely on a simulation study to analyze it. We approached the new bootstrapping methods, which are very useful in analyzing a simulation. Our aim is to implement bootstrapping strategies in software tools which will be used by both the teaching staff and the students in didactic and research activities, with the purpose to optimize the use of substances and reactants.

IFMBE Proceedings, 2009

This paper presents a numerical study of a diffusive free convection in a rectangular cavity fill... more This paper presents a numerical study of a diffusive free convection in a rectangular cavity filled with a porous medium. It is assumed that the left vertical wall is subject to a mixed boundary condition (Robin) and the right vertical wall is kept at a constant concentration, while the horizontal walls are adiabatic. The governing mass conservation, Darcy law and

2010 IEEE International Conference on Automation, Quality and Testing, Robotics (AQTR), 2010

This paper is devoted to investigate numerical optimization algorithms of the theory of deformabl... more This paper is devoted to investigate numerical optimization algorithms of the theory of deformable surfaces and to emphasize some of their computerized applications in medical image analysis and prosthetic surgery. After defining the 3D variational deformable model, both in static and dynamic form, an algorithm for finding the optimal deformable surface is presented, together with estimations for its approximation error and a condition for its convergence. Finally, a statistical modeling and a corresponding algorithm applied in surgery are presented.

The paper presents a Java framework for stochastic modelling and sim- ulation, used as an infrast... more The paper presents a Java framework for stochastic modelling and sim- ulation, used as an infrastructure to model and simulate real world activities, phe- nomena and processes, particularly in health care, patient monitoring and medical education. We modelled the flow of patients through medical units, considering both their arrivals and their stay in the hospital. Also, we implemented bootstrap- ping

Methodologies, Tools and New Developments for E-Learning, 2012

2010 Fourth International Conference on Digital Society, 2010

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify the main barriers to wound healing, such as tissue nonviable, infection, inflammation, moisture imbalance, or edge non-advancing. This framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. We make experiments for wound healing simulation using various treatments and compare the results with experimental observations. Our experiments are supported by XML based databases containing knowledge extracted from previous wound healing experiences and from medical experts' knowledge. Also, we rely on new paradigms of the Artificial Intelligence for creating e-learning scenarios to be used in a context of active learning, for wound image understanding. To implement the e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning.

ECMS 2006 Proceedings edited by: W. Borutzky, A. Orsoni, R. Zobel, 2006

The paper presents a Java framework for analysing and processing wound images, which are incorpor... more The paper presents a Java framework for analysing and processing wound images, which are incorporated in elearning tools, to be used by both the students and the teaching staff in their didactic and research activities. We implement in Java traditional methods and algorithms for analysing a digital picture of a wound from a specific distance, for identifying its boundaries and for calculating its area. We build in Java models for various categories of wounds, due to aetiologies such as pressure, burn, chilblain, vascular insufficiencies, diabetic foot ulcer, venous leg ulcer and other chronic disease states. Based on colour and texture analysis, we identify the main barriers to wound healing, such as tissue non-viable, infection, inflammation, moisture imbalance, or edge non-advancing. The Java framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. Also, we rely on new paradigms of artificial intelligence (Bayesian Inference, Case Based Reasoning and Intelligent Agents) for creating e-learning scenarios to be used in a context of active learning. To implement these e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content (data and documents). Proceedings 20th European Conference on Modelling and Simulation Wolfgang Borutzky, Alessandra Orsoni, Richard Zobel © ECMS, 2006 ISBN 0-9553018-0-7 / ISBN 0-9553018-1-5 (CD)

2010 Fourth UKSim European Symposium on Computer Modeling and Simulation, 2010

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify the main barriers to wound healing, such as tissue non-viable, infection, inflammation, moisture imbalance, or edge non-advancing. This framework provides the infrastructure for preparing e-learning scenarios based on practice and real world experiences. We make experiments for wound healing simulation using various treatments and compare the results with experimental observations. Our experiments are supported by XML based databases containing knowledge extracted from previous wound healing experiences and from medical experts' knowledge. Also, we rely on new paradigms of the Artificial Intelligence for creating e-learning scenarios to be used in a context of active learning, for wound image understanding. To implement the e-learning tools, we use Java technologies for dynamic processes and XML technologies for dynamic content. Our approach to e-learning is so called blended learning, which combines traditional face-to-face and Web-based on-line learning, with focus on principles of active learning.

2009 IEEE/ACS International Conference on Computer Systems and Applications, 2009

This paper presents a Java framework for analyzing, processing and understanding wound images, to... more This paper presents a Java framework for analyzing, processing and understanding wound images, to be used in teaching, learning and research activities. We intend to promote e-learning technologies in medical, pharmaceutical and health care domains. Using Java and XML technologies, we build models for various categories of wounds, due to various etiologies. Based on color and texture analysis, we identify