Ecological University of Bucharest
Bucharest, Romania

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Olteanu C.-O.,Polytechnic University of Bucharest | Mihaila J.-M.,Ecological University of Bucharest
UPB Scientific Bulletin, Series A: Applied Mathematics and Physics | Year: 2017

The aim of the present work is to prove new applications of some earlier general abstract results on the subject to spaces of analytic functions. The Cauchy inequalities are used systematically, as well as constrained extension of linear operators. One gives necessary and sufficient conditions and only sufficient conditions for the existence of solutions of an operator valued moment problem and of Mazur-Orlicz problems. The upper constraint appears naturally from the corresponding computations, while the lower constraint is sometimes the positivity of the solution. Considering Markov moment problem, one solves a concrete interpolation problem with two constraints. In the case of Mazur-Orlicz problems, the interpolation conditions are replaced by the corresponding inequalities mentioned in section 2. Operator valued solutions are obtained.

Ben Ali J.,University of Tunis | Abid S.,University of Tunis | William Jervis B.,115 Button Hill | Fnaiech F.,University of Tunis | And 2 more authors.
Neurocomputing | Year: 2014

Alzheimer's disease (AD), the most common form of dementia, is a complex and very serious nervous disease. Currently no medication is really effective against it. Even, its diagnosis and management remain challenging research problem for scientists. This paper aims towards identifying early-stage AD based upon the characteristics of the non-oscillatory independent components (ICs) of the auditory event related potential (AERP) waveforms of an oddball task for healthy and newly diagnosed AD subjects. Using 27 sensors to record P300 Evoked Potentials (EPs) as features vectors to train the simplified fuzzy adaptive resonance theory map (SFAM) neural network as a classifier, normal and AD subjects were classified with higher than 95% of success. The use of the ARTMAP-familiarity discrimination (ARTMAP-FD) shows that the separation of the two populations was achieved with high success and without any mistake. © 2014 Elsevier B.V.

Traditional agricultural practices based on non-customized irrigation and soil fertilization are harmful for the environment, and may pose a risk for human health. By continuing the use of these practices, it is not possible to ensure effective land management, which might be acquired by using advanced satellite technology configured for modern agricultural development. The paper presents a methodology based on the correlation between remote sensing data and field observations, aiming to identify the key features and to establish an interpretation pattern for the inhomogeneity highlighted by the remote sensing data. Instead of using classical methods for the evaluation of land features ( field analysis, measurements and mapping), the approach is to use high resolution multispectral and hyperspectral methods, in correlation with data processing and geographic information systems (GIS), in order to improve the agricultural practices and mitigate their environmental impact (soil and shallow aquifer). © IWA Publishing 2012.

Tevi G.,Ecological University of Bucharest | Scradeanu M.,University of Bucharest | Scradeanu D.,University of Bucharest
International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM | Year: 2014

One of the most important environmental issues which Romania faces as member of the European area is land management and natural resources exploitation within protected areas. A good example is the Natura 2000 ROSCI0103 Lunca Buzaului (Buzău and Brăila Counties, Romania). This protected area was established with the purpose of conserving habitats and species characteristic of aquatic and riparian ecosystems, in a region with significant anthropic stress generated by alluvial deposits exploitation, waste storage, agricultural activity, and hydro energy producing potential. The need to put such area in value requires an integrated approach, based on the use of GIS and remote sensing data. In this study, the following resources have been used: Pléiades panchromatic and multispectral images at 0.5 and 2 m spatial resolution, orthophotos with a 2.5 m spatial resolution, a digital terrain model (DTM) based on a 30 m network, topographical plans with 1:5000 and 1:10000 scales, thematic vectors for land using – after Corine Land Cover 2006 data sets. The time difference in the acquirement of images, the exploitation of all the aforementioned data, provides the possibility of having a time scale perspective, between 1970 and 2012. The data have been processed using specific software – ArcGis 10.0 for management of spatially referenced data, ENVI EX for remote sensing data processing and RockWorks 12 for geological and hydrogeological data processing. In the next step, processed remote sensing data, correlated with field collected data has led to the following processes: • Design of the flooding areas, along Buzău River and an environmental impact assessment associated with different scenarios; • Evaluation of actual fluvial erosion processes for the Buzău River system, both under natural state and influenced by the alluvial material extraction activities which are taking place in the area. From geomorphological point of view, the specificity of this habitat is given by the pronounced dynamic processes and, consequently, by the necessity of efficient land management. The results related to the extension of flooding areas at different flow rates, morphological instability, and the presence of erosional risk sections, have been correlated with land use characteristics (from Corine Land Cover) for the entire studied region. Obtained results: GIS data base, flooding and geomorphological risk maps. All these are useful useful for developing effective management plans in order to achieve conservation objectives for species and habitats, for mitigating environmental impact, and for elaborating a geological resources sustainable exploitation strategy. © SGEM2014.

Arhip O.,Ecological University of Bucharest | Arhip C.,Grigore T. Popa University of Medicine and Pharmacy
2013 E-Health and Bioengineering Conference, EHB 2013 | Year: 2013

This paper presents patients recovered after head, neck and mouth cancer and it has as main objective the observations regarding quality-of-life changes. The medical record is briefly exposed. We highlight the modalities by which the patients healed their inside and outside scars commanding respect due especially to media exposure. They rebuilt their personalities becoming public speakers, blog-writers, fundraisers, being kind of modern Demosthenes. The Attic Demosthenes fought with a speech impediment and he considerably practiced to deliver orations. The modern Demosthenes have to face the fear of premature death, diverse traumas, lack of voice, disfigured faces, very low self-esteem, long bodily and psychic severe distress, difficult social reintegration. The online world has offered proper ways to present their experiences via videoconferences, blogs, sites, interviews and speeches on YouTube. The development of educational initiatives from these inspirational stories may be an effective, procreative strategy. © 2013 IEEE.

Cristian A.,Grigore T. Popa University of Medicine and Pharmacy | Odette A.,Ecological University of Bucharest
2013 E-Health and Bioengineering Conference, EHB 2013 | Year: 2013

Psychiatric field also covers aspects concerning diseases leading to suicide. This paper generally presents the main psychiatric causes for committing suicide and it focuses on writers who chose autolytic death. They anticipated their decision by rhetorical and stylistic devices used in their works. We comment upon some of them revealing the suicidal intention as a master thought for the artist and as a stylistic supremacy. The writers' temper and psychological structure prone to suicide are mostly genetic. We found the needed information via multimedia, new media, social media and the classic form of books/essays. Media mobilize people in terms of knowledge and learning. It is a net of information, cognition-paths and intellectual experiences that helps people to enhance their cultural and knowledge background. Reinforced in the latest decades, media offer a comfortable settlement for researchers, students and lay readers who are interested in the relationship between creativity and psychopathology. © 2013 IEEE.

Catana I.,Polytechnic University of Bucharest | Safta C.-A.,Polytechnic University of Bucharest | Panduru V.,Ecological University of Bucharest
UPB Scientific Bulletin, Series D: Mechanical Engineering | Year: 2010

The paper presents a method of power optimization of the wind turbines by changing the pitch angle. There are analysed the structure and the performance of a electro-mechanical servomechanism used to put on position the wind turbine blades so that a maxim out power could be obtained at a given wind speed. Numerical simulations validated the applied method, and the results obtained are comparable with the ones from technical literature.

Vasilescu M.,Ecological University of Bucharest | Rojanschi V.,Ecological University of Bucharest
Environmental Engineering and Management Journal | Year: 2010

During the last 20 years it was registered over the world, an increased trend in the consumption of the bottled water, due to the public concerns about the tap water safety and the persistent bottled water advertising campaigns, as well. The question is if the bottled water represents a great improvement in comparison with tap water if the subject is analyzed in details. In favor of the tap water stand the characteristics of being cheap, basically safe, and easily available. But sometimes tap water can be polluted with many industrial chemicals that are not totally removed by the water purification systems, and occasionally can be contaminated with bacteria. There is also a migration process of some metals like copper or lead from the pipes or joints. Bottled water is safe from bacterial infections, taste good, is easily portable, but is usually very expensive, and may contain unacceptable levels of the plastic chemicals that leech from plastic containers. This paper summarizes safety, costs, and benefits of tap and bottled waters, taking also into consideration the regulations and consumption pattern in Romania.

Vlad S.-N.,Ecological University of Bucharest
Central European Journal of Geosciences | Year: 2011

Romania has a genuine accumulation of "blind" porphyry CuAuMo systems associated with Cu skarns or AuAg (PbZn) epithermal vein sets. Many such hidden structures were discovered inadvertently during state exploration based on local tradition that Romanian Carpathians are rich in vein and skarn ore types. Notable dichotomy between porphyries associated with peripheral skarns versus epithermal ores is expressed by age (Mesozoic versus Tertiary), precious metal content, alteration types and zoning, shape/size and extension of ore bodies. Preliminary conclusions on metallic/alteration assemblages around porphyries in addition to geophysical information about inferred deep-seated Alpine plutonism promote potential exploration vectors for what will be an increasingly important deposit type in the future. © Versita Sp. z o.o.

Bigan C.,Ecological University of Bucharest | Panduru V.,Ecological University of Bucharest
Academic Journal of Manufacturing Engineering | Year: 2015

Sun energy farms develop as a powerful option of renewable energy solution. Besides issues as placement region or area selection, technical problems of National or Local Grid integration and policies, the choice of fixed position panels of solar cells is often applied due to the lack of trust in automatic sun tracking option. This paper deals with providing the optimal energy saving schedule for a daily operation of a sun tracking positioning.

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