Aurel Vlaicu University of Arad

About: Aurel Vlaicu University of Arad is a education organization based out in Arad, Romania. It is known for research contribution in the topics: Fuzzy logic & Fuzzy control system. The organization has 312 authors who have published 904 publications receiving 6727 citations. The organization is also known as: UAV & Universitatea „Aurel Vlaicu” din Arad.

Implement the transformative learning theory through Dolceta Project

Abstract: Transformative Learning Theory, known as Mezirow’s Theory, is one of nowadays learning theory which underlines the rational and analytical part of the process as well as spiritual or emotional part of the learning process. Mezirow posits that all learning is change but not all change is transformation - that is a very critical point in building of a positive attitude of the individuals which are under the education umbrella. Transformative Learning having three phases: critical reflection, reflective discourse and action, could be found into Dolceta – on-line consumer education – site, as possible example of people in action for ”win-win”. Win-win what? Dignity of individuals for knowing their rights by applying in their everyday life of the critical reflection and reflective discourse after an intellectual effort for learning (e-learning).

Comparative Analysis of Various Image Splicing Algorithms

Abstract: Daily millions of images are uploaded and download to the web, as a result the data is available in the paperless form in the computer system for organization Nowadays, with the help of powerful computer software such as Photoshop and Corel Draw, it is very easy to alter the contents of the authenticated image without leaving any clues This led to a big problem due to the negative impact of image splicing It is highly recommended to develop image tampering detection technique to recognize the authentic and temper images In this paper, we propose an enhanced technique for blind images splicing by combing Discrete Cosine Transform Domain (DTC) and Markov feature in the spatial domain Moreover, Principal Component Analysis (PCA) is used to select the most significant features Finally, Support Vector Machine (SVM) is applied to classify the image as being tempered or genuine on the publicly available dataset using ten-fold cross-validation By applying different statistical techniques, the results showed that the proposed technique performs better than other available detection techniques in the literature

Time domain optical coherence tomography investigation of bone matrix interface in rat femurs

Abstract: The materials used to fabricate scaffolds for tissue engineering are derived from synthetic polymers, mainly from the polyester family, or from natural materials (e.g., collagen and chitosan). The mechanical properties and the structural properties of these materials can be tailored by adjusting the molecular weight, the crystalline state, and the ratio of monomers in the copolymers. Quality control and adjustment of the scaffold manufacturing process are essential to achieve high standard scaffolds. Most scaffolds are made from highly crystalline polymers, which inevitably result in their opaque appearance. Their 3-D opaque structure prevents the observation of internal uneven surface structures of the scaffolds under normal optical instruments, such as the traditional light microscope. The inability to easily monitor the inner structure of scaffolds as well as the interface with the old bone poses a major challenge for tissue engineering: it impedes the precise control and adjustment of the parameters that affect the cell growth in response to various mimicked culture conditions. The aim of this paper is to investigate the interface between the femur rat bone and the new bone that is obtained using a method of tissue engineering that is based on different artificial matrixes inserted in previously artificially induced defects. For this study, 15 rats were used in conformity with ethical procedures. In all the femurs a round defect was induced by drilling with a 1 mm spherical Co-Cr surgical drill. The matrixes used were Bioss and 4bone. These materials were inserted into the induced defects. The femurs were investigated at 1 week, 1 month, 2 month and three month after the surgical procedures. The interfaces were examined using Time Domain (TD) Optical Coherence Tomography (OCT) combined with Confocal Microscopy (CM). The optical configuration uses two single mode directional couplers with a superluminiscent diode as the source centered at 1300 nm. The scanning procedure is similar to that used in any CM, where the fast scanning is en-face (line rate) and the scanning in depth is much slower (at the frame rate). The results showed open interfaces due to the insufficient healing process, as well as closed interfaces due to a new bone formation inside the defect. The conclusion of this study is that TD-OCT can act as a valuable tool in the investigation of the interface between the old bone and the one that has been newly induced due to the osteoinductive process.

Bibliometrics and Research Quality

Abstract: In any research community the word “Journal” refers to record of a serious, scholarly publication of the findings which are most often peer-reviewed. Journals, nowadays, exist in print and in online (Web-based) formats. These voluminous scientific records called “Journals” are mostly used by research scholars (Ph.D. students)/postgraduate students and nowadays even by undergraduate students in engineering with a sole view to get his/her findings validated by experts in that field of research and consequently share it with the scientific community through publications in a relevant Journal.

The advantages of a swept source optical coherence tomography system in the evaluation of occlusal disorders

Abstract: Occlusal disorders are characterized by multiple dental and periodontal signs. Some of these are reversible (such as excessive tooth mobility, fremitus, tooth pain, migration of teeth in the absence of periodontitis), some are not (pathological occlusal/incisal wear, abfractions, enamel cracks, tooth fractures, gingival recessions). In this paper we prove the advantages of a fast swept source OCT system in the diagnosis of pathological incisal wear, a key sign of the occlusal disorders. On 15 extracted frontal teeth four levels of pathological incisal wear facets were artificially created. After every level of induced defect, OCT scanning was performed. B scans were acquired and 3D reconstructions were generated. A swept source OCT instrument is used in this study. The swept source is has a central wavelength of 1050 nm and a sweeping rate of 100 kHz. A depth resolution determined by the swept source of 12 μm in air was experimentally measured. The pathological incisal wear is qualitatively observed on the B-scans as 2D images and 3D reconstructions (volumes). For quantitative evaluations of volumes, we used the Image J software. Our swept source OCT system has several advantages, including the ability to measure (in air) a minimal volume of 2352 μm3 and to collect high resolution volumetric images in 2.5 s. By calculating the areas of the amount of lost tissue corresponding to each difference of B-scans, the final volumes of incisal wear were obtained. This swept source OCT method is very useful for the dynamic evaluation of pathological incisal wear.