Florica Moldoveanu

Florica Moldoveanu
Polytechnic University of Bucharest | UPB · Department of Computers

Doctor of Engineering

About

197
Publications
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918
Citations

Publications

Publications (197)
Article
Full-text available
Photorealism has become a growing requirement for real-time graphics applications. Among the components needed to obtain photorealism, one of the most important is the simulation of the light transport, the result of which is called global illumination. With the growing interest in the research in this field, the need to develop a learning approach...
Article
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Virtual and augmented reality technologies have known an impressive market evolution due to their potential to provide immersive experiences. However, they still have significant difficulties to enable fully fledged, consumer-ready applications that can handle complex tasks such as multi-user collaboration or time-persistent experiences. In this co...
Article
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The most important component of photorealism in Computer Graphics is given by a physically correct approximation of the light transport. Besides the direct illumination from light sources, there is an indirect illumination, produced by the reflections of the light rays on other surfaces of the scene. In Computer Graphics, the process of computing t...
Article
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This paper focuses on the binary classification of the emotion of fear, based on the physiological data and subjective responses stored in the DEAP dataset. We performed a mapping between the discrete and dimensional emotional information considering the participants' ratings and extracted a substantial set of 40 types of features from the physiolo...
Chapter
As more and more people suffer from anxiety disorders, new means of clinical and therapeutical interventions are required. For instance, virtual agents or embodied conversational agents, enriched with human-like appearance and verbal and non-verbal behavior have emerged in recent years. They simulate the real-world therapist, communicate with the p...
Chapter
In the last decade, technology has been rapidly evolving, making the humankind more dependent on digital devices than ever. We rely more and more on digitalization and we are excited to welcome emergent technologies like Augmented Reality (AR) into our everyday activities as they show great potential to enhance our standard of life. AR applications...
Article
Public speaking started to gain much attention when it comes to phobias, which is anxiety for new presenters. In some cases, specialists consider that avoiding the phenomenon which causes the phobia is sufficient treatment; in others, the exact opposite, being gradually exposed to the object of fear may lead to a cure. We have to start looking for...
Article
Objectives Manual or semi-automated segmentation of the lower extremity arterial tree in patients with peripheral arterial disease (PAD) remains a notoriously difficult and time-consuming task. The complex manifestations of the disease, including discontinuities of the vascular flow channels, the presence of calcified atherosclerotic plaque in clos...
Article
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This paper proposes a protocol for the acquisition and processing of biophysical signals in virtual reality applications, particularly in phobia therapy experiments. This protocol aims to ensure that the measurement and processing phases are performed effectively, to obtain clean data that can be used to estimate the users’ anxiety levels. The prot...
Preprint
Full-text available
As life expectancy is mostly increasing, the incidence of many neurological disorders is also constantly growing. For improving the physical functions affected by a neurological disorder, rehabilitation procedures are mandatory, and they must be performed regularly. Unfortunately, neurorehabilitation procedures have disadvantages in terms of costs,...
Article
Full-text available
As life expectancy is mostly increasing, the incidence of many neurological disorders is also constantly growing. For improving the physical functions affected by a neurological disorder, rehabilitation procedures are mandatory, and they must be performed regularly. Unfortunately, neurorehabilitation procedures have disadvantages in terms of costs,...
Chapter
This paper presents the design, a pilot implementation and validation of eTher, an assistive virtual agent for acrophobia therapy in a Virtual Reality environment that depicts a mountain landscape and contains a ride by cable car. eTher acts as a virtual therapist, offering support and encouragement to the patient. It directly interacts with the us...
Chapter
This paper presents a human-centered methodology for designing and developing Virtual Reality Exposure Therapy (VRET) systems. By following the steps proposed by the methodology – Users analysis, Domain Analysis, Task Analysis and Representational Analysis, we developed a system for acrophobia therapy composed of 9 functional, interrelated modules...
Chapter
This paper presents the conceptual design, implementation and evaluation of a VR based system for treating phobias that simulates stress-provoking real-world situations, accompanied by physiological signals monitoring. The element of novelty is the holonic architecture we propose for the real-time adaptation of the virtual environment in response t...
Conference Paper
Full-text available
As technology advances, we can see that companies come up with different solutions for different problems. Blind and visually impaired people are a category of people that require help from technology to complete daily tasks. Whether it is to read and navigate on a computer or walk around, technology plays a big role in these people’s lives. But su...
Article
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Computer vision based indoor localization methods use either an infrastructure of static cameras to track mobile entities (e.g., people, robots) or cameras attached to the mobile entities. Methods in the first category employ object tracking, while the others map images from mobile cameras with images acquired during a configuration stage or extrac...
Article
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In this paper, we investigate various machine learning classifiers used in our Virtual Reality (VR) system for treating acrophobia. The system automatically estimates fear level based on multimodal sensory data and a self-reported emotion assessment. There are two modalities of expressing fear ratings: the 2-choice scale, where 0 represents relaxat...
Article
Full-text available
Emotions constitute an indispensable component of our everyday life. They consist of conscious mental reactions towards objects or situations and are associated with various physiological, behavioral, and cognitive changes. In this paper, we propose a comparative analysis between different machine learning and deep learning techniques, with and wit...
Conference Paper
Globally, rehabilitation in healthcare systems requires major improvements so that affordable, high-quality services will become available to a larger scale. Rehabilitation benefits both individuals and the entire community from an economic and social point of view. There are different types of rehabilitation, for a wide range of medical conditions...
Article
This paper introduces a real-time region growing segmentation algorithm, designed for Graphics Processing Units (GPUs), which labels only a fraction of the input elements. Instead of searching locally around each element for strong similarity, like state-of-the-art segmentation and pre-segmentation methods do, the proposed algorithm inexactly searc...
Article
Full-text available
There has been steady progress in the field of affective computing over the last two decades that has integrated artificial intelligence techniques in the construction of computational models of emotion. Having, as a purpose, the development of a system for treating phobias that would automatically determine fear levels and adapt exposure intensity...
Conference Paper
The paper is generalizing and enhancing the modeling principles and concepts introduced by the authors in previous research in order to surpass known drawbacks affecting the performance of current 3D modeling software applications. The proposed modeling method presents increased flexibility in modifying and reusing existing models and is alleviatin...
Article
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As more and more people are left disabled by stroke each year, it is of vital importance to progress in the research of new ways to improve their condition, and to ensure that they maintain as much as possible their independence in everyday life. A step in this direction of research was taken with TRAVEE, a system dedicated to neuromotor rehabilita...
Article
Full-text available
Our paper presents a series of modern ways used for augmenting reading and increasing people's interest in books. In today's society, reading has been replaced with other activities related to technology and the evolution of science. However, the advantages brought in by technology can also be applied to books in order to increase their attractiven...
Conference Paper
Full-text available
This paper presents the design and development of a Virtual Reality game for treating acrophobia, as well as a comparative study between the players' performance in the game, under two different conditions - one in which the difficulty levels are adjusted according to the subjects' biophysical data and one in which they are not. The results showed...
Article
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This work describes the geometry behind the Smith chart, recent 3D Smith chart tool and previously reported conceptual Hyperbolic Smith chart. We present the geometrical properties of the transformations used in creating them by means of inversive geometry and basic non-Euclidean geometry. The beauty and simplicity of this perspective are complemen...
Article
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This paper presents the state in which the TRAVEE (Virtual Therapist with augmented feedback for neuromotor rehabilitation) project has ended, what it has achieved, why it should be pursued, as well as outline a few of the main directions in which the research started by TRAVEE must be continued. For this purpose, the paper begins by presenting inf...
Article
Full-text available
Sorin Hostiuc,1 Arthur-Jozsef Molnar,2 Alin Moldoveanu,3 Maria Aluaş,4 Florica Moldoveanu,3 Iuliana Bocicor,2 Maria-Iuliana Dascalu,5 Elisabeta Bădilă,6 Mihaela Hostiuc,6 Ionut Negoi7 1Department of Legal Medicine and Bioethics, Carol Davila University, 2SC Info World SRL, 3Department of Computers, Polytechnic University of Bucharest, Bucharest, 4D...
Article
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This paper is intended to define a new concept, the Dynamic Management of Distributed Cases - DMDC, and to describe it in the context of its implementation in the automation of processes put in execution by liberal professions. It also makes an inventory of existing systems' shortcomings and identifies the minimal set of standards for process forma...
Article
Full-text available
The purpose of this paper is to introduce our training strategy, based on gamified 3D virtual environments, for improving sound localization and navigational skills of visually impaired people (VIP). During training, the VIPs will use an advanced sensory substitution device (SSD) which conveys information about the environment. An example of such d...
Article
This paper contains the implementation details of a solution aimed to improve the learning process during the biomechanics study. The original aspect of the paper consists in the usage of Virtual and Augmented Reality to assess the quality of their benefits in the educational area. The Virtual Reality setup contains two scenarios due to the cybersi...
Conference Paper
Full-text available
In this paper, we present the indoor 3D pipeline of an assistive system for visually impaired people, whose goal is to scan the environment, extract information of interest and send it to the user through haptics and sounds. The particularities of indoor scenes, containing man-made objects, with many planar faces, led us to the idea of developing t...
Article
Simulating multi-body dynamics with both rigid and flexible parts and with frictional contacts is a hard problem. We solve this by expressing the couplings between the bodies as position level constraints. The implicit treatment of the constraint directions gives us improved stability over velocity based methods. Then by employing regularization of...
Conference Paper
Full-text available
In this paper we present a new position based approach for simulating rigid and flexible bodies with two-way coupling. This is achieved by expressing all the dynamics as constraints and running them in the same solver. Our main contribution is an accurate contact and Coulomb friction model based on a fixed point iteration of a cone complementarity...
Article
Introduction As the number of people with visual impairments (that is, those who are blind or have low vision) is continuously increasing, rehabilitation and engineering researchers have identified the need to design sensory-substitution devices that would offer assistance and guidance to these people for performing navigational tasks. Auditory and...
Preprint
Full-text available
The paper is exploring the possibility of using the non-linearity of elementary function compositions in designing new cryptographic methods, and particularly in designing synchronous stream ciphering methods. The security analysis and the statistical tests run on the proposed method show that the new approach is promising.
Article
Source Routing allows a node in the path of a packet to specify partially or completely the route taken by that packet. The route is appended to packet header as a list of nodes to traverse, therefore making simple, stateless forwarding decisions. In this paper, we present a novel approach of Source Routing in SDN that uses stacked VLAN tags. Our s...
Conference Paper
This paper describes a prototype system based on Augmented Reality (AR), designed to improve the biomechanics study. The proposal includes a full system overview with accents on the AR area, where the main solution is based on HoloLens. The whole system is focused on the latest available technology, not only for the AR module. To get to the best re...
Conference Paper
EFFICIENT LEARNING TECHNIQUE IN MEDICAL EDUCATION BASED ON VIRTUAL AND AUGMENTED REALITY A. Voinea, A. Moldoveanu, F. Moldoveanu University Politehnica of Bucharest (ROMANIA) The usage of Virtual and Augmented Reality (VR and AR) in medical education is a discussed subject in the scientific papers from the past years if not decades. Fortunately,...