Valahia University of Târgoviste
  • Târgovişte, Dambovita, Romania
Recent publications
The Tourism Satellite Account provides data on the tourism sector since 2011. The presentation of this data, as it is currently done only at national level, does not allow for studies or analyses at regional level or by specific areas of interest. At present, a limited number of countries in the world, around 15, break down these indicators by region. The article reviews the evolution of academic studies on the Tourism Satellite Account, starting from the time when no data on tourism industries or the indirect effects of tourism activities were recorded, to the present day, where principles and methods for extending the Satellite Account to the regional level are presented. The research question is: What is the level of Direct Gross Domestic Product from tourism for each development region in Romania? The methodology used to achieve the research goal involved correlation analyses on the variables studied, namely: Domestic Tourism Consumption, Number of Overnight Stays and Direct Gross Domestic Product from Tourism, as well as simple and multi-factor regression analyses, for which Direct Gross Domestic Product from Tourism is the outcome variable. The data used in these analyses are recorded from the periodicals of the Tourism Satellite Account and from the periodic records of the National Statistical Institute. The conclusions drawn from the data analysis are based on the analysis of the quality of the statistical estimators used. The data analysis, led to the conclusion that the development of the tourism sector in the period under study 2014-2019, with a growth rate over the entire period of 1,41 in terms of GDPDT, is relatively evenly distributed over each region in terms of the regional level of growth rate. The transfer of the Satellite Account aggregates by development regions or specific tourism areas, carried out in this article is a building block for other research methodologies on the analysis of all factors contributing directly or indirectly to the growth in GDP of the tourism sector.
The whole historical evolution of economic development, with all its positive valences, but also with its failures, has prepared the conditions for the affirmation and emergence of sustainable development. Sustainable development expresses the need to substantiate the evolutions of the economic environment in correlation with the general behavior towards the natural and the social environment. Economic development, as it has been for centuries, cannot be continued without taking into account the conditions and restrictions imposed by the other two environments. The new vision of the future development of the world starts from the need to ensure equal opportunities for human generations that coexist and succeed each other in life. Scientists, politicians, civil society are aware of the need to change the current way of producing and consuming goods in society, thus moving to a sustainable development based on a human economy and the compatibility of man-made environment with the natural environment of the monetary profit with the social-human one. Over the last two decades, more attention has been paid to the analysis of social problems, especially those concerning the quality of life and standard of living. All studies in the field are focused on the analysis of living standards indicators, considered by specialists to be, through the researched field, the scope, calculation methodology, usefulness of results in developing social policies, the most important social indicators.
Due to its complexity, the issue of goods distribution must be approached in a much broader context, to highlight the consistency and prospects of such a sector, taking into account the diversity of all its forms – retail, wholesale, medium trade, etc. And on the other hand, the need to correctly evaluate the decisive role both in the development of production, but also in the modernization and promotion of consumption, so that it is close to all forms and sectors of the market. In such a sense, it is necessary to start from the exchange of goods and their role in the economic evolution of each country or community. The organization of the exchange of goods, in the realization of which trade is involved, is one of the basic acts of society. That act, which involves the whole social structure, through all or more spontaneous actions, in fact defines the place of the economy in the context of social life, specialization and the increasingly rigorous delimitation of the fields of action both in the case of national borders and worldwide. The multitude of collective or private entrepreneurs, who produce or sell products, the increase in the number of consumers or businesses in need of products, the emergence of representative buyers, but also various categories of intermediaries, over time have led to the emergence of an optimal framework for development and development exchanges.
The local budget appears as the main component of local finances that derives from all public finances and is individualized by a certain structure in which the number of administrative-territorial units in a country, the public services provided, the degree of economic development, etc. participate. local budgets reflect economic relations in the form of money that appear in the process of distributing the national income through which the funds necessary for the interests of the local public authorities that are coordinated by them are formed and distributed. The local public finances are also characterized by a transfer of value that takes place between the participants in economic establishment and use of the mobilized financial resources at the disposal of the authorities. The transfer of value is done without a direct consideration, which means that the person from whom the transfer of money resources is made from the local budget. Local public finances reflect the participation of individuals and legal entities in the form of taxes and fees in the formation of local budget revenues without direct and immediate consideration.
Most people make very few real estate transactions on life transactions, and these, in addition to the fact that the most important financial transaction in which they are involved, also have a high degree of complexity from a legal and financial point of view. This finding is valid in all countries with market-based economic systems, regardless of their degree of development. The three elements that are common to real estate transactions in these states are: meeting demand with supply, transfer of property rights, and mortgage financing. Over time, each of these elements has been in the attention of the world’s competition authorities in general and the Competition Council in particular. Activity in the UK real estate market has always been at European economic events, and its action is very important, manifesting itself both as an international trigger - a conclusive example would be the “subprime” residential crisis in the United States. and an important transmission mechanism to the real economy, which affects the transactions carried out, influencing mortgages, etc. or the effective application of competition rules. However, these measures require the construction of a consistent argument that address both the causes of these anti - competitive restrictions and their effects on consumers. It is also necessary to quantify the possible effects that they can have reforms in this area, as well as a comparison of the results obtained with empirical evidence from the states in which these reforms were undertaken.
The purpose of this paper is to provide a presentation and an analysis of the evolution and trends in monetary and fiscal policy in Romania. There will be a brief presentation of the evolution and objectives of monetary policy as well as the evolution of fiscal-budgetary policy. In order to respond to similar requirements outlined from the perspective of the monetary policy in Romania, this paper aims to expand the area of information that monetary analysis can provide in the current context of the Romanian economy. At the same time, the analysis, the indicators regarding the fiscal-budgetary policy (expenditures, revenues, and the budget deficit), as well as the indicators of the monetary policy (inflation rate, exchange rate and public debt) in Romania during 2014-2020 are presented. Much of the economic theory as well as recent practice of central banks assigns to currency and monetary analysis an important role in the formulation of monetary policy. It follows from the relevance of the information provided to the central bank by a comprehensive monetary analysis- in which the results generated by statistical and econometric techniques are complemented by expert judgment- the most significant being information on price developments, risks to disinflation / price stability, as well as the dynamics of economic growth.
This article takes into consideration cyber security economics to understand whether cyber security and economics is a partnership among equals or any of these two disciplines have the upper hand. Cyber security economics is more than just computer science, security studies and economics in a holistic way, it is a dynamic cross disciplinary matter involving psychology, forensic, sociology, etc. The argument is that there is no clear definition of cybersecurity, apart from a set of protocols that are highly technical, and when it comes to cyber security economics Gordon-Loeb model provides a good picture on the general image over the industry, yet, much more is ignored, as the costs of a cyber security attack to succeed is huge, save the hidden costs and other externalities. Apart from regulation establishing a common ground, information security economics is an under researched field of interest, especially as digital sovereignty act is about to be voted for, together with common rules Information security.
The research is proposing to analyze the relationship between education for green entrepreneurship among students and their interests in implementing business ideas in the field of green entrepreneurship. The research has had the projection of an explanation regarding specific factors of students when approaching a subject like green entrepreneurship. It has started from the paradigm in which the rise of interest for green entrepreneurship is influenced by the knowledge regarding the opportunities of creating green business and by the level of developing entrepreneurial competencies. In this framework, a set of research hypotheses has been created as follows: students’ preoccupation for ecological entrepreneurship is influenced by their age (H1); students’ preoccupation for green entrepreneurship is influenced by identifying and recognizing ideas for green business (H2); students’ satisfaction regarding the quality of entrepreneurial education directly influences the preoccupation regarding the creation of a green business (H3). The research is a quantitative type and has been created on a sample representative (N = 123 students, valid N = 120) from the Valahia University of Targoviste, Romania of which the students are part. The research variables were constructed with the module style extracted from scientifically validated research tools. The measurements of variables have been conducted with the help of a Likert-type scale and interpretation with ANOVA. The results of the research were the following—according to the Likelihood Ratio Chi-Square test, there were compared and analyzed variables such as green knowledge and education for green entrepreneurship, to be able to quantify the students’ preoccupation values with green entrepreneurship. The p-value is ˃1, which means that the researched subjects manifest increased interest in green entrepreneurship. This fact demonstrates that the average of the values which were attributed according to the Likert-type scale has offered values between 4 and 5 (5 being the maximum level), a fact that confirms the students’ increased preoccupation with green entrepreneurship. The assigned values obtained are: 18–22 age (m = 4.1532), 22–25 age (m = 4.4375), 26–28 age (m = 4.4375), 29–39 age (m = 4.2396), and the over 39 age (m = 4.2750). We also concluded that the concern for green entrepreneurship among students correlates positively with entrepreneurship education and green knowledge.
In recent years, universities worldwide have experienced rapid changes with an immense impact, which have been influenced by technological progress and the social trends of digitalization. Like all other revolutionary changes, digital transformation involves intense adjustment/readjustment. University sustainability must be the active concern of all higher education institutions. Thus, the present research aims to analyse teachers' acceptance of new technologies and the impact on their wellbeing and university sustainability. The main objective was to analyse the acceptance of technology in special the e-learning opportunities and the wellbeing of teacher in an emergent country like Romania. To achieve our goal, we created a questionnaire based on the literature, and with the help of the technology acceptance model, we tested our hypotheses. The results indicate several discontents on the part of teachers concerning adapting to new technologies and even a personal discomfort in adapting to these new technologies. Thus, we can note that wellbeing significantly influences job satisfaction and teachers' involvement in sustainable development.
Among the challenges in the field of the paper we have identified the necessity of control methods and tools of mobile robots (MRS) equipped with robot manipulator (RM) serving assembly/ disassembly mechatronic lines (A/DML).The framework of the work reported here is represented by SMART&ASTI A/DML served by two MRs with RM, working collaboratively and the goal is development of a multi-agent system able control interactively trajectories of MRs, working collaboratively to serve the A/DML, by avoiding the collisions between them. The advantage offered by the proposed solution consists in graphical representation of the trajectory of MRs working collaboratively, as well as the current status of them, while the users are able to interact intuitively with the MRs trough the proposed GUI The added value of the paper consists in the implementation of multi-agents systems in a complex A/DML served by two MRs equipped with RM, working collaboratively, the increased autonomy in communication between the entities of entire system, and the adaptive control of MRs trajectories.
The manufacturing technology for heterojunction bipolar transistor (HBT) is different from the one used for bipolar silicon junction transistor (BJT). The base in case of BJT is manufactured by using diffusion and the diffusion laws determine a Gaussian type of profile in the base. HBT devices are manufactured using molecular epitaxy which gives a contact doping profile. In case of HBT, producing an internal field by using uniform doping is no more possible. This is the reason why was used in the gradation of the molar composition. The Analysis using Octave soft was made for the transit time through the base of the drift HBT transistors type GaAs/AlxGa1-xAs.
This research aims to measure the financial performance of companies in the water and sewerage sector by creating a sustainable econometric model for making long-term strategic decisions for managers and stakeholders. The research methodology consisted of the use and statistical processing of the data included in the summary financial statements of 40 regional operators in the field from 2014 to 2020. Multiple linear regression has been created with which stakeholders and water and sewerage specialists can shape changes in value-added variation, the average cost per employee, labor productivity, and energy expenditure on the net profit of water operators and sewerage. The results indicated that the independent variables used, such as value-added, labor productivity, or intangible assets have a direct influence on increasing the net profit of water and sewerage companies. Other independent variables such as the average cost per employee or the expenditure on electricity and water negatively influence the increase in the net profit of companies in the water and sewerage sector. The conclusions indicated that the average net profit is influenced by independent variables and the model created, and it can be successfully applied to other international companies in the field.
In recent years, the accelerated development of the remote sensing domain and the improvement of the resolution and frequency of satellite images allowed the increase in the accuracy of the evaluation of morphometric characteristics and the spatiotemporal distribution of pit lakes, including the small ones. Our study quantitatively analyzes small-scale pit lakes in the piedmont and subsidence plains from contact with the Getic and Curvature Subcarpathians from Romania using the normalized difference water index (NDWI) and data series, with different resolutions, from Landsat 8, Google Earth, and Sentinel 2A. The problems encountered in extracting the contours of the gravel pit lakes were determined by the different resolution of the images, the uneven quality of the images exported from Google Earth, and an additional challenge was given by the diversity of the analyzed land surfaces, the land use, and the optical properties of the lakes. A comparison of the obtained NDWI values using data series from Sentinel 2A and Landsat 8 highlighted the importance of resolution and also showed a larger spectral difference between the identified water bodies and the surrounding land in favor of Sentinel 2A. Regarding the vegetation-derived indices, superior leaf area index (1.8–3) was recorded in low-lying plains and mixed areas (tall shrubs, wetlands, etc.) because the river banks have increased moisture that supports taller species with denser foliage and the sparsely vegetated areas are located in agricultural crops and in/near villages. Changes in vegetation richness and abundance can be spatiotemporally monitored using indices derived from the spectral bands of satellite imagery.
In this work, new treatments based on multi-walled carbon nanotubes (MWCNTs), MWCNTs decorated with zinc oxide (ZnO), MWCNTs decorated with hydroxyapatite (HAp) and MWCNTs decorated with silver (Ag) nanoparticles dispersed in PHBHV solution are proposed for improving sound oak wood properties. We hypothesize that the solutions containing decorated MWCNTs will be more efficient as wood consolidants, not only because of the improved mechanical properties of the treated wood but also because of the hydrophobic layer created on the wood surface. In order to test these hypotheses, the treatments’ potential was investigated by a number of complex methods, such as colorimetric parameter measurements, water absorption tests, mechanical tests, artificial aging and antifungal tests. The data confirm that the treated wood materials have moderate stability, and the color differences are not perceived with the naked eye. A significant improvement of the treated samples was observed by water absorption, humidity and mechanical tests compared to untreated wood. The best results were obtained for samples treated by brushing with solutions based on decorated CNTs, which confirms that a uniform and thicker layer is needed on the surface to ensure better protection. The wood behavior with accelerated aging revealed that the control sample degraded faster compared to the other treated samples. Antifungal tests showed that higher growth inhibition was obtained for samples treated with 0.2% MWCNTs_ZnO + PHBHV. Considering all of the obtained results, it can be concluded that the most effective treatment was MWCNTs_ZnO + PHBHV at a nanocomposite concentration of 0.2%, applied by brushing. Thus, wood protection against mold and fungi will be achieved, simultaneously ensuring improved mechanical strength and water barrier properties and therefore maintaining the structural integrity of sound oak wood over time.
The Pb(Mg1/3Nb2/3)O3-based ceramic system was obtained by using a modified variant of the conventional ceramic method in order to get pyrochlore-free compositions. Solid solutions obtained from Pb(Mg1/3Nb2/3)O3 and Ln(Mg1/2Ti1/2)O3 with Ln = Y3+, La3+, Pr3+, Nd3+ and Sm3+, were synthesized using a 3-step columbite precursor method and appropriate milling and sintering conditions. The structural phases of all sintered compositions were investigated in detail. The X-ray diffraction results demonstrate that all the samples possess a perovskite structure. The influence of dopant on the incorporation degree in the solid solutions was studied. The dielectric constants at three frequencies were measured and the influence of the dopant on these values was discussed.
The article analyzes the Romanian curriculum specific to primary and preschool education. The article focuses on the curriculum approved in 2011 for primary education, respectively the one approved in 2019 for early education. The analysis between the primary education curriculum and the early education curriculum follows the specifics of the curriculum, the purpose, the values promoted, the focus on the formation of the respective behavioral competencies. The analysis is performed on the basis of the educational policy documents elaborated by the Institute of Education Sciences and on the official curricular documents elaborated and approved by the Romanian Ministry of National Education.
In the pandemic context, both stress and educational communication have been altered. In this article, we will analyse the dynamics of the factors involved in didactic communication and identify the real and potential stressors for teachers teaching before pandemic; we will also assess their perceptions of the anxiety felt about online teaching and how it affects educational communication. The hypothesis of the research postulates that the stress perceived by the teachers has elevated during pandemic and the educational communication has gone through a series of changes and reorientations both at the level of the didactic strategies adopted and the regulation of anxiety factors involved (the feeling of safety, the perception of break as a stress factor instead of relaxation, the volume of tasks attributed to each teacher etc). The research variables were the pandemic context in school environment, the level of stress as perceived by the teachers and the educational communication. The research objectives were aimed at assessing the perception of teachers in rural areas vs. that of teachers in urban areas regarding the stress felt and the dynamics of educational communication; also comparing the stress felt by teachers and the dynamics of educational communication incumbents vs. substitutes, educators vs. teachers and teachers in rural areas vs. urban teachers. We expect that the results of the research would have therefore a more assumed awareness from school managers of the fact that there are many predictors of stress that should no longer be ignored and that raising teacher’s resilience both at personal level and academic one should become a priority. School managers should organize mindfulness courses and anxiety management courses for teachers.
The article aims to analyze, from a theoretical point of view, the aspects related to the presence of lifelong learning in the knowledge society, as a contribution to the perfection of human personality, but also as a mean to achieve balance and performance individually, professionally and socially. The features of the society we claim from the perspective of modern times will be highlighted, characterized, as a whole, by a dynamism and an unprecedented information-technological evolution, with a difficult future to predict. In this context, man must constantly improve, be adaptable and perform, and the key to success is to invest in quality education (we refer here to any kind of educational influence), education that must - or should - overlap with throughout life. The study aims to define lifelong learning, focusing on possible conceptual confusions, to establish the features of this education, as well as possible ways to achieve, but also warnings, which could generate possible errors, with effect on proper development and personal and social satisfaction.
This article aims to analyse, from a theoretical point of view, the aspects that define the education for sustainability in the context of global development policies. In this context, the phrase “sustainable education” has been described in the context of the relationship between indicators that measure the quality in education and the long-term solutions offered by the education providers to specific problems related to some fundamental areas of sustainability: social, environmental and economic. The current study aims to give arguments for an explanatory paradigm that has been taken into account which is the following: education for sustainability is a predictor of quality education.
The chapter presents the analysis of the water temperature variability in the Lower Danube River. Temperature of water is one of the most important quality indicators for river ecosystems, which controls many physical and biogeochemical processes within the water body. All the aquatic species have the specific water temperature ranges for growth and development, thus, significant variations of water temperature may cause harmful consequences to the aquatic ecosystems. Surface waters present high variations of temperature depending on spatio-temporal variability and environmental conditions. Gradual rising of the surface waters temperature has a favorable influence on the water properties because this facilitates the natural water purification. An important influencing factor is the discharge of heated wastewaters directly in the streams, which can cause the reduction of dissolved oxygen content. In this regard, we present a time series statistical analysis of the water temperature recorded between 2001 and 2016 in three monitoring sections located on the Romanian side of the Lower Danube i.e., Pristol (RO2), Chiciu (RO4), and Reni (RO5) using monitoring data from the Transnational Monitoring Network of the Danube River (TNMN) database. Despite some differences between the monitoring sections determined by the local hydrological, climatic, and topographical conditions, a relative constancy of the water temperature was observed on the entire analyzed period. However, the obtained trendlines show that the water temperature increased from 2001 to 2016, this pattern being more evident in the southernmost control section (Chiciu-RO4). The SARIMA model provided a comprehensive description of the spatiotemporal variations of the water temperature but more complex approaches for improving water monitoring and modeling in the Lower Danube are required to integrate them in process-based analysis.
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303 members
Rodica-Mariana Ion
  • Doctoral School of Materials Engineering
Claudia Stihi
  • Sciences and Advanced Technologies Department
Horia Andrei
  • Department of Automatics, Informatics and Electrical Engineering
Stefania Iordache
  • Department of Environmental Engineering
Mihai Bîzoi
  • Automatic Control, Informatics and Electrical Engineering
Bd. Regele Carol I, no. 2, 130082, Târgovişte, Dambovita, Romania
Head of institution
Assoc. Prof. Calin D. OROS, PhD