170 research outputs found
Distribution of integral points on varieties
No full textOne of the guiding principles in Diophantine geometry is that, if an algebraic variety contains "many" integral points, then there is a geometric reason explaining their abundance. In this thesis we will focus on two geometric notions of abundance for integral points, namely Zariski density and the Hilbert Property, the latter being a generalization of Hilbert's irreducibility theorem to arbitrary algebraic varieties. We will focus on the case of complements of anticanonical divisors in smooth del Pezzo surfaces, proving that the integral points are always potentially dense and that the Hilbert Property holds, potentially, when such a complement is simply connected. We will also discuss joint work of Dragos Ghioca and the author that led to the proof of the Drinfeld modules analogue of Siegel's theorem on the finiteness of integral points.Science, Faculty ofMathematics, Department ofGraduat
Tax competition and factors influencing the gross domestic product and foreign direct investments of CEE countries
No full textIn the beginning of the twenty-first century, governments have tried to attract companies by offering different tax incentives or even changing their entire tax regime. Among the countries that have attracted foreign investments we have countries in Eastern Europe which enjoyed the benefits of the Single European Market and the stability that an EU membership brings. Given the importance of foreign capital we focus our paper on the factors the impact FDI and GDP. The main objective of the paper was to assess the impact of taxation on the GDP and FDI but our analysis has allowed to also view the impact of other factors such as infra- structure, unemployment, cost of doing business and labour force. We have selected 11 countries of the 13 New Member States that have joined the EU after 2004 and looked at data for the years 2005–2015. To see which factors influence the GDP and FDI, we have used the method of panel least squares. The results of our analysis show that taxation does play a role in the increase of the GDP and the attraction of FDI. Nevertheless, it is not the main factor and countries should not only rely on reduction of fiscal pressure
Points of small height on affine varieties defined over function fields of finite transcendence degree
No full textThe problem of this thesis concerns points of small height on affine varieties defined over arbitrary function fields, and is based on published work with Prof. Dragos Ghioca (see [GN20]). The main result is as follows: the points lying outside the largest subvariety defined over the constant field cannot have arbitrarily small height.
Prior results of this type include [Ghi09], [Ghi14]. In particular, [Ghi14] answers this question for function fields of transcendence degree 1. It also captures the history of the subject and features an argument that was initially used by the author of this thesis to extend [Ghi14] to varieties defined over function fields of arbitrary (finite) transcendence degree. The content of this thesis and the associated published paper not only extends [Ghi14] to arbitrary transcendence degree, but also provides a sharp lower bound for points which are not contained in the largest subvariety
defined over the constant field. The argument here works directly with the defining polynomials of the variety (compare with [Ghi14]), and the lower bound only depends on their degrees.Science, Faculty ofMathematics, Department ofGraduat
Correction to: Two years later: Is the SARS-CoV-2 pandemic still having an impact on emergency surgery? An international cross-sectional survey among WSES members (World Journal of Emergency Surgery, (2022), 17, 1, (34), 10.1186/s13017-022-00424-0)
No full textFollowing the publication of the original article [1], the author name “Dragos Serban” under The WSES COVID-19 emergency surgery survey collaboration group was incorrectly written as “Dragos Seban” instead of “Dragos Serban”. The original article has been corrected
Correction to: Two years later: Is the SARS-CoV-2 pandemic still having an impact on emergency surgery? An international cross-sectional survey among WSES members (World Journal of Emergency Surgery, (2022), 17, 1, (34), 10.1186/s13017-022-00424-0)
No full textFollowing the publication of the original article [1], the author name “Dragos Serban” under The WSES COVID-19 emergency surgery survey collaboration group was incorrectly written as “Dragos Seban” instead of “Dragos Serban”. The original article has been corrected
Correction to: Two years later: Is the SARS-CoV-2 pandemic still having an impact on emergency surgery? An international cross-sectional survey among WSES members
No full textFollowing the publication of the original article [1], the author name “Dragos Serban” under The WSES COVID-19 emergency surgery survey collaboration group was incorrectly written as “Dragos Seban” instead of “Dragos Serban”. The original article has been corrected
Sustainability and Financial Performance of Companies in the Energy Sector in Romania
No full textIn the article, we focus on the question of sustainability in the renewable energy sector of Romania. The aim of the current paper is to analyze the financial performance of the companies operating in the field. Our assumption is that the success of the implementation of the energy switch from classic to renewables relies on the businesses operating in this industry. In our article, we have selected the most prominent players in the energy industry, comparing the performance of those that are producing renewable energy to the ones that are producing energy using fossil fuels. Our analysis has shown that, starting with 2013, the companies have encountered financial difficulties, which has led to a halt in investments and the questioning of the sustainability of entering the market. After analyzing the data, we have seen that the investments have been rather opportunistic, based on the commitment of the government to keep the subsidies introduced by the policy, and have not been based on the realistic long-term financial performance of the companies in this area
The Digitalization–Performance Nexus in the European Union: A Country-Level Analysis of Heterogeneity and Complementarities
No full textThis study investigates the multifaceted impact of digitalization on economic performance across the 27 European Union member states from 2017 to 2023. Using a comprehensive panel dataset, the analysis moves beyond aggregate metrics to dissect how specific digital levers contribute to trade performance and national income. A two-way fixed effects (FEs) regression model is employed to rigorously control for unobserved country-specific heterogeneity and common time-based shocks, with diagnostic tests confirming the suitability of this specification. The results reveal a complex and often counter-intuitive set of relationships. One key finding is a statistically significant negative association between the EU’s headline Digital Economy and Society Index (DESI) and goods exports, a paradox that emerges in the model once specific business-level digital tools are accounted for. This suggests that composite indices can be misleading for granular policy analysis. The marginal benefit of cloud adoption diminishes significantly in countries with higher levels of public investment in Research and Development (R&D), indicating a substitution rather than a complementary relationship between these two innovation channels
Changing Times: The Impact of Digitalization on the Behavior of Professionals and Their Perception towards Development
No full textIn 2020, the educational system was taken by surprise by the impact of the COVID-19 pandemic. Most of the educational institutions were delivering face-to-face classes and were forced to switch to online teaching in a very short period of time due to lockdown measures and the health and safety measures put in place by public authorities. In addition to universities, professional courses were also forced to be delivered online. Most of the time, these professional courses are important because they are directly linked to keeping the right to practice. The present paper focuses on the changing pattern in behavior of professionals and their acceptance of online courses. By applying over 1000 questionnaires in a timespan of more than one year, we have studied the impact of digitalization on the behavior and perception of professionals. We measured if the change towards online courses could be sustainable in the long run. The results of our study show that the behavior of professionals is different than those of students and that the online courses can be a long-term solution for education in professional environments
POLICIES OF THE COMMERCIAL BANKS LIQUIDITY MANAGEMENT IN THE CRISIS CONTEXT
No full textThe article focuses on liquidity management in Commercial Banks, and presents the steps that a good management has to follow to ensure that the position of the bank is not put into jeopardy following a lack of liquidity. Different management decisions andliquidity management, liquidity strategy, liquidity risk, liquidity risk exposure liquidity risk funding, currency strategy, liquidity planning procedures, alternative scenarios, liquidity crisis management
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