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Search Results: 1 - 10 of 325816 matches for " Gy rgy Csomós "
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Analysis of Leading Cities in Central Europe: Control of Regional Economy
Gy rgy Csomós
Bulletin of Geography. Socio-economic Series , 2012, DOI: 10.2478/v10089-011-0012-y
Abstract: Nowadays, one of the characteristic orientations in social science studies focusing on cities is the ranking of cities, as well as the definition of the world's leading cities (world cities, global cities) on the basis of various criteria. Central European countries are given just a minor role in these researches, particularly in comparison with German cities with their considerable economic performance. This analysis compares the large cities of Austria, Germany and the countries of the Visegrád Group in terms of their role in economic leadership. To this end, the characteristic parameters have been examined: the GDP in purchasing power standards and nominal GDP of the cities, the revenues of large companies found in these cities, as well as the domestic market capitalization of the stock exchanges.
CSOMóS, Gyrgy
Debreceni M?szaki K?zlemények , 2007,
Abstract: Significant elements of the urban system are the large cities, in Hungarian relation they are the cities with county right. In this paper we examine the relation between the higher education sector and large cities on the basis of representative statistical data. The weight of large cities is determined in regional and national relation.
CSOMóS Gyrgy
Debreceni M?szaki K?zlemények , 2008,
Abstract: Large cities are of primary importance in the global settlement network in the 21th century. They have strong functions in the field of finance, culture and politics, the population of them is increasing dynamically than their countries population. However their position is not unambiguous. Mostly in the British and American literature the global cities are being considered as regional centres but in Europe and especially in Hungary the regional structure is distinctly different, so the definition of the regional centres are also different.
CSOMóS Gyrgy,KULCSáR Balázs
Debreceni M?szaki K?zlemények , 2011,
Abstract: Recently, the most spectacular result of urbanism has been the enormous growth of urban agglomerations with more than 10 million inhabitants. As of the 20th century megacities have been examined by researchers from a variety of approaches while governments have been concerned about their limitless growth. In the middle of the 20th century new terms were coined in an effort to express the limitless growth of urban agglomerations. In this study we examine the current status of two of these: Ecumenopolis and Megalopolis.
KULCSáR, Balázs,CSOMóS, Gyrgy
Debreceni M?szaki K?zlemények , 2012,
Abstract: With the utilization of the available potentials and technologies, geothermal energy may contribute to the reduction of the quantities of the emitted contaminants and greenhouse gases, as well as the development of peripheral regions. Towards this end, such governmental measures are needed that set up a favourable regulatory environment, and put the financial funds for the support of implementation in place so that geothermal energy resources could complement the currently used, conventional energy carriers, and more efficient settlement development could be achieved. In this context, the University of Debrecen and the University of Oradea have conducted joint studies with the purpose of making a realistic assessment of geothermal energy resources in the region of S cueni–Létavértes and examining the options of long-term utilization. The research has been multidisciplinary, and thus embraced the field of geography, geodetics, well drilling, automation, mechanical engineering and tourism. The principal goal has been the utilization of geothermal energy with the largest possible efficiency in the area of S cueni and Létavértes.
CSOMóS Gyrgy,KULCSáR Balázs
Debreceni M?szaki K?zlemények , 2009,
Abstract: According to the European Spatial Development Perspective (ESDP) basic element of the competitive economic development of the European Union is the balanced regional development through to achieve a polycentric spatial structure. At present, there is only one outstanding larger geographical zone of global economic integration: the core area of the EU, the pentagon defined by the metropolises of London, Paris, Milan, Munich and Hamburg. The monocentric spatial structure describes not only the territory of the EU, but also the territories of the member states and their regions. Analysis having designated by the European Spatial Planning Observatory Network (ESPON) points out that on the basis of the Functional Urban Areas Hungary is the most polycentric member state of the EU. Theoretically it is possible to analyse NUTS 2 regions but for lack of enough data ESPON could not fulfil that. The main purpose of this paper is to analyse the polycentricity of the Hungarian NUTS 2 regions on the basis of the rank-size distribution.
First-line eradication of Helicobacter pylori: Are the standard triple therapies obsolete? A different perspective
Gyrgy Miklós Buzás
World Journal of Gastroenterology , 2010,
Abstract: Studies concerning the eradication of Helicobacter pylori have resulted in a proliferation of meta-analyses. To date, there are 303 meta-analyses cited in PubMed, 113 dealing with the therapy of the infection. A chronological analysis of the results of meta-analyses performed between 1998 and 2010 shows that first-line standard triple therapies achieved eradication rates on an intention-to-treat basis of around 80%; prolonging treatment to 14, but not 10 d should improve the results. The proton pump inhibitors have a similar efficiency, and giving a double dose is more efficient than the standard doses of these drugs. Triple and quadruple therapies proved to be equivalent. Based on meta-analytical data, the decrease in efficiency over time cannot be substantiated: eradication rates < 80% followed from the introduction of triple therapies. As alternatives, ranitidine bismuth citrate-, levofloxacin- or furazolidone-based therapies were shown to obtain the same eradication rates as standard triple regimens. Sequential therapies and quadruple non-bismuth-based therapies were superior to standard triple therapies but their use is limited to certain countries. In the author’s opinion, and from a meta-analytical viewpoint, standard triple therapies cannot yet be considered obsolete. Furthermore, non-inferiority trials are proposed for the future, including assessment of local contemporary antimicrobial resistance profiles and the CagA and CYP2C19 status of the enrolled patients.
Role of Orvosi Hetilap in the development of Hungarian gastroenterology
Gyrgy Miklós Buzás
World Journal of Gastroenterology , 2010,
Abstract: AIM: To analyze the contribution of Orvosi Hetilap (Hungarian Medical Journal) to the field of gastroenterology.METHODS: All issues of the journal between 1857 and 2008 and identified original articles and reviews dealing with gastroenterology were reviewed. The rate of publications, the thematic distribution and foreign sources of knowledge were assessed. The dates that major achievements in gastroenterology were introduced in Hungary were compared to those dates in Western medicine.RESULTS: A total of 4799 original/research articles on gastroenterology were published, which represents 11.1% of the total publications. Thematic rankings showed that liver and biliary diseases represented 20.36% of the total, followed by gastric diseases (9.35%) and surgery (8.77%). A total of 268 foreign journals were reviewed: 50.9% were German, 30.4% English, 12.1% French and only 6.6% were in other languages. The major achievements of gastroenterology were introduced with varying delays compared to Western countries.CONCLUSION: Orvosi Hetilap has made a large contribution to the development of Hungarian gastroenterology. The high proportion of gastroenterology studies underlines the importance of digestive diseases in public health.
Quantum Scent Dynamics (QSD): A new composite model of physical particles
Gyrgy Darvas,Tamás F. Farkas
Physics , 2008,
Abstract: The paper introduces an alternative rishon model for a composite structure of quarks and leptons. The model builds matter from six basic blocks (and their antiparticles). For this reason it introduces new properties of rishons, called "scents", that can take two values, called masculine and feminine scents, which can appear in three colours both. The Quantum Scent Dynamics (QSD) model calculates new electric charges for the rishons. Then it discusses the construction of the known families of particles from scents, as well as the constraints and advantages of the proposed hypothetic model.
Wigner matrices, the moments of roots of Hermite polynomials and the semicircle law
Miklós Kornyik,Gyrgy Michaletzky
Mathematics , 2015,
Abstract: In the present paper we give two alternate proofs of the well known theorem that the empirical distribution of the appropriately normalized roots of the $n$th monic Hermite polynomial $H_n$ converges weakly to the semicircle law, which is also the weak limit of empirical distribution of the appropriately normalized eigenvalues of a Wigner matrix. In the first proof -- based on the recursion satisfied by the Hermite polynomials -- we show that the moment generating function of the roots of $H_n$ is convergent and it satisfies a fixed point equation, which is also satisfied by $c(z^2)$, where $c(z)$ is the generating function of the Catalan numbers $C_k$. In the second proof we compute the leading term of the kth moments (as a polynomial in $n$) of $H_n$ and show that it coincides with $C_k$, the $k$th Catalan number, where k is even. We also mention the known result that the expectation of the characteristic polynomial $(p_n)$ of a Wigner random matrix is exactly the Hermite polynomial $(H_n)$, i.e. $Ep_n(x) = H_n(x)$, which suggest the presence of a deep connection between the Hermite polynomials and Wigner matrices. Keywords: Random matrix, characteristic polynomial, semicircle law, moments of roots of Hermite polynomials.
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