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Featured researches published by Marija Tomić.


Advanced Materials Research | 2013

Fullerene Based Nanomaterials for Biomedical Applications: Engineering, Functionalization and Characterization

Lidija Matija; Roumiana Tsenkova; Jelena Munćan; Mari Miyazaki; Kyoko Banba; Marija Tomić; Branislava Jeftić

Since their discovery in 1985, fullerenes have attracted considerable attention. Their unique carbon cage structure provides numerous opportunities for functionalization, giving this nanomaterial great potential for applications in the field of medicine. Analysis of the chemical, physical, and biological properties of fullerenes and their derivatives showed promising results. In this study, functionalized fullerene based nanomaterials were characterized using near infrared spectroscopy, and a novel method - Aquaphotomics. These nanomaterials were then used for engineering a new skin cream formula for their application in cosmetics and medicine. In this paper, results of nanocream effects on the skin (using near infrared spectroscopy and aquaphotomics), and existing results of biocompatibility and cytotoxicity of fullerene base nanomaterials, are presented.


IFAC Proceedings Volumes | 2012

Human-And-Humanoid Motion - Distinguish between Safe and Risky Mode

Marija Tomić; Veljko Potkonjak; Aleksandar D. Rodic; Vesna Antoska

Abstract This paper explores a question rarely addressed in studies of human/humanoid gait and related movements. In the case of slow motion with the possibility of stopping and retreating, the human/humanoid has a full control over his movements, while in the latter case called “normal” motion he falls practically out of control. The idea might arise to relate the first situation with stability and the latter with instability. However, the notion of stability, defined in the system theory, does not agree with this and in order to avoid the confusion we here suggest the terms safe and risky motions.


Fullerenes Nanotubes and Carbon Nanostructures | 2016

Remanent magnetization measurements of polymeric materials containing fullerol C60(OH)24 before and after exposure to external magnetic field

Marija Tomić; Aleksandra Vasić-Milovanović; Lidija Matija; Đuro Koruga

ABSTRACT The problem of low solubility of fullerene is surpassed by its functionalization with –OH groups making a new molecule called fullerol C60(OH)24. Materials used in this study are synthesized by incorporating fullerol into commercial soft contact lens material Definitive74 made by Contamac, UK. Three different mass concentrations of fullerol are used: 0.003%, 0.01% and 0.015%. Hence, three materials are produced and the fourth material, the standard one, was used as a reference sample. The purpose of incorporating fullerol into polymer was to develop new materials for soft contact lenses with improved optical and mechanical characteristics. The magnetic properties of polymers change due to fullerol presence therefore the aim was to show the differences in magnetic properties of the materials before and after the exposure to four different external influences. The measurements of a remanent magnetization of these materials are done by spinner magnetometer, JR-6A.


Advances in Robot Design and Intelligent Control: Proceedings of the 25th International Conference on Robotics in Alpe-Adria-Danube Region (RAAD) | 2016

Embodiment of Human Personality with EI-Robots by Mapping Behaviour Traits from Live-Model

Aleksandar D. Rodic; Djordje Urukalo; Milica Vujovic; Sofija Spasojevic; Marija Tomić; Karsten Berns; Salah Al-Darraji; Zuhair Zafar

The paper deals with the problems of the development of personality and temperament at robots based on the emotional cognitive mapping models from people as biological models. The investigations were based on the use of on-line tests to determine the profile of the human personality and the type of temperament as important factors that determine the character of the behaviour. A young professional actor is involved as a model of human personality - an actor with the ability of transformation of affective states depending on the different life situations. In order to develop cognitive affective personality model, different measurements with the actor are performed. His movements, facial expressions and voice effects as a reaction to the current situation (scenario) have been acquired. Measurement data are processed and an appropriate analysis, generalisation of knowledge and data fusion is performed in order to synthesize cognitive affective model of personality. A method for the implementation (mapping) of the obtained models from the biological systems to a humanoid robot is presented. Robothespian will be used for experimental verification of the obtained results.


Archive | 2018

Nanomaterials for Skin Care

Suzana Miljković; Marija Tomić; Igor Hut; Svetlana Pelemiš

There are a lot of cosmetic products on the market based on nanotechnology. Those products contain nanomaterials since they have many advantages such as improved delivery of active ingredients, stability and photostability of potentially unstable cosmetic ingredients, increased efficacy and tolerance of the skin for various UV filters. Nanomaterials contribute to easiness of application and aesthetic appearance of final products. Although they offer many possibilities, their use demands caution. Nanoparticles have a large surface to volume ratio leading to their reactivity and alteration in biological activity compared to the parent bulk materials. The shape and size of the particles are the cause if their toxic effects, rather than their chemical properties. There are various nanosystems currently in use, in pharmaceutical and cosmetic industry, and many new ones, waiting to be applied. In this article we are going to introduce those who find an application in personal care products such as: liposomes, niosomes, transfersomes, nanoemulsions, solid lipid nanoparticles, polymeric systems, nanocrystals, fullerenes and finally metal oxide nanoparticles.


International Journal of Advanced Robotic Systems | 2018

Toward optimal mapping of human dual-arm motion to humanoid motion for tasks involving contact with the environment

Marija Tomić; Kosta Jovanovic; Christine Chevallereau; Veljko Potkonjak; Aleksandar D. Rodic

In this article, we explore human motion skills in the dual-arm manipulation tasks that include contact with equipment with the final aim to generate human-like humanoid motion. Human motion is analyzed using the optimization approaches starting with the assumption that human motion is optimal. A combination of commonly used optimization criteria in the joint space with the weight coefficients is considered: minimization of kinetic energy, minimization of joint velocities, minimization of the distance between the current and ergonomic positions, and maximization of manipulability. The contribution of each criterion for seven different dual-arm manipulation tasks to provide the most accurate imitation of the human motion is given via suggested inverse optimization approach calculating values of weight coefficients. The effects on actors’ body characteristics and the characteristics of the environment (involved equipment) on the choice of criterion functions are additionally analyzed. The optimal combination of weight coefficients calculated by the inverse optimization approach is used in our inverse kinematics algorithm to transfer human motion skills to the motion of the humanoid robots. The results show that the optimal combination of weight coefficients is able to generate human-like humanoid motions rather than individual one of the considered criterion functions. The recorded human motion and the motion of the humanoid robot ROMEO, obtained with the strategy used by human and defined by our inverse optimal control approach, for the tasks “opening/closing a drawer” are assessed visually and quantitatively.


International Conference on Robotics in Alpe-Adria Danube Region | 2017

Building of Hyper-redundant Under-Actuated Soft Robotic Arm with 20 DOF

Ilija Stevanović; Aleksandar D. Rodic; Milos Jovanovic; Marija Tomić

The paper presents new mechanical design and control of a hyper-redundant, under actuated, soft robot arm with 20 DOFs with gripper. The robot mechanism is powered by the 9 servo-motors and the power transmission from the actuators to robot links and further to the end-effector is realized intra structurally by strings. Controllability and dexterity of the soft robotic arm is verified by model simulation before implementing control algorithms to the robot controller. For the purpose of simulation the algorithms of the inverse kinematics are realized. Mechanical prototype in its’ early phase of integration is shown in this paper, too. Control performances of the hyper redundant soft robot arm are evaluated by a simulation example.


Contemporary materials | 2012

INFLUENCE OF CONTACT LENSES MATERIAL ON AQUEOUS SOLUTIONS

Marija Tomić; Dragomir Stamenković; N. Jagodić; Jovana Šakota; Lidija Matija

In this paper we present the investigation of influence of new nanophotonic materials for contact lenses on aqueous solutions. The contact lenses that we used were made of standard siloxane acrylate material with incorporated molecules C 60 and another with fullerol C 60 (OH) 24 . The aim of the investigation was to compare the influences of these materials on different solutions, such as aqua purificata, saline and drops for dry eyes. Optomagnetic spectroscopy was used to analyze different solutions. The obtained spectrums were commented on and compared with the standard contact lens material, which was analyzed by using the same method, in order to show the differences in influence of this standard and new nanophotonic material. This research contributes to a better understanding of biocompatibility of new contact lens materials.


Zoologischer Anzeiger – A Journal of Comparative Zoology | 2005

Morphological variability of several biotypes of Ephedrus plagiator (Nees, 1811) (Hymenoptera: Braconidae: Aphidiinae) and description of a new species

Marija Tomić; Željko Tomanović; Nickolas G. Kavallieratos; Petr Starý; Christos G. Athanassiou; Vladimir T. Tomić; Luka R. Lučić


Robotica | 2018

Human to humanoid motion conversion for dual-arm manipulation tasks

Marija Tomić; Christine Chevallereau; Kosta Jovanovic; Veljko Potkonjak; Aleksandar D. Rodic

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