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Galton's Fallacy and Economic Convergence: An Alternative Approach to Regional Convergence in Greece
Dimitris Paschaloudis,Stilianos Alexiadis 서울대학교 경제연구소 2006 Seoul journal of economics Vol.19 No.2
Most empirical studies on regional convergence are concentrated on testing the 'conventional' measures of σ and β-convergence. However, these measures are crucially flawed as measures of convergence, especially at the regional level of analysis. As a response to this, Lichtenberg(1994) introduces a measure that overcomes the limitations of the 'conventional' measures of convergence. More specifically, this measure combines the tendencies towards decline inequalities (σ-convergence) with the tendencies of poor regions to grow faster than rich regions do (β-convergence). Having the measure introduced by Lichtenberg(1994) as the main vehicle of analysis this paper offers an alternative view on the issue of regional convergence in Greece. According to empirical results the 51 NUTS-3 regions of Greece follow a pattern characterized by distinct phases of convergence and divergence.
Dimitris Killinger,Supathorn Phongikaroon 한국방사성폐기물학회 2022 방사성폐기물학회지 Vol.20 No.2
This work provided a review of three techniques—(1) spectrochemical, (2) electrochemical, and (3) spectroelectrochemical– for molten salt medias. A spectroelectrochemical system was designed by utilizing this information. Here, we designed a spectroelectrochemical cell (SEC) and calibrated temperature controllers, and performed initial tests to explore the system’s capability limit. There were several issues and a redesign of the cell was accomplished. The modification of the design allowed us to assemble, align the system with the light sources, and successfully transferred the setup inside a controlled environment. A preliminary run was executed to obtain transmission and absorption background of NaCl-CaCl2 salt at 600°C. It shows that the quartz cuvette has high transmittance effects across all wavelengths and there were lower transmittance effects at the lower wavelength in the molten salt media. Despite a successful initial run, the quartz vessel was mated to the inner cavity of the SEC body. Moreover, there was shearing in the patch cord which resulted in damage to the fiber optic cable, deterioration of the SEC, corrosion in the connection of the cell body, and fiber optic damage. The next generation of the SEC should attach a high temperature fiber optic patch cords without introducing internal mechanical stress to the patch cord body. In addition, MACOR should be used as the cell body materials to prevent corrosion of the surface and avoid the mating issue and a use of an adapter from a manufacturer that combines the free beam to a fiber optic cable should be incorporated in the future design.
Financial Market Dynamics in an Enlarged European Union
( Dimitris Kenourgios ),( Aristeidis Samitas ),( Nikos Paltalidis ) 세종대학교 경제통합연구소 2009 Journal of Economic Integration Vol.24 No.2
This paper provides evidence of integration in European equity and bond markets over the period January 2, 1997 to October 1, 2006. Our focus is to examine time-varying correlation dynamics in Euro-area, Central European (CE) and Balkan financial markets, modifying the asymmetric generalized dynamic conditional correlation (AG-DCC) model developed by Cappiello, Engle and Sheppard (Journal of Financial Econometrics, 2006). Using structural breaks, we identify the optimal time decay where financial markets share highest comovement. The results show an increase in the level of dependence during the period of the internet bubble collapse (2000), the Balkan countries start formally discussions to join European Union (2000), the introduction of Euro banknotes and coins (2002) and the entry of CE countries in EU (2004). The CE European and Balkan countries become gradually more integrated with the EMU countries, which is consistent with the interpretation that these countries may be expected to join the Euro in the future.
Congestion Control for MANETs: An overview
Dimitris Kanellopoulos 한국통신학회 2019 ICT Express Vol.5 No.2
In a MANET, there is no need to deploy any infrastructure to make nodes to communicate with each other. MANETs have unique characteristics that complicate congestion control. The standard TCP congestion control mechanism is not able to handle the special properties of a shared wireless multi-hop channel well. The frequent changes of the network topology and the shared nature of the wireless channel pose significant challenges. Therefore, various congestion control approaches for MANETs have been proposed. This paper discusses TCP enhancements for wireless links. It analyzes design challenges for an enhanced transport protocol, and presents congestion control schemes for MANETs.
Intraductal papilloma of the sublingual gland imitating a ranula
Dimitris Tatsis,Nikolaos Kechagias,Antonios Tsekos,Georgios Petrakis,Konstantinos Vahtsevanos 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.1
Ductal papillomas are rare benign lesions of the salivary glands with two distinctive types, intraductal and inverted. The rarest anatomical location where intraductal papillomas occur is the major salivary glands. In the present study, we report an intraductal papilloma of the left sublingual gland with the relevant clinical, imaging, and histopathological findings and postoperative follow-up. To our knowledge, this is the fourth case of an intra-ductal papilloma of a sublingual gland to be reported in the international literature. We present this rare case because of its clinical and radiological imitation of a ranula.
War and Cultural Heritage The Case of Religious Monuments
( Dimitris Mylonopoulos ),( Polyxeni Moira ),( Aik. Kikilia ) 세계문화관광학회 2014 International Journal of Culture and tourism Resea Vol.7 No.1
This paper attempts a recording and study of the international legal framework and jurisprudence related to the legal protection of cultural/religious monuments and investigates, through the study of contemporary cases, the effectiveness of the said legal framework. More specifically, using the archives of national and international organisations and international tribunals, we researched, studied and interpreted the available national and international legal texts and case law pertaining to the protection of religious cultural heritage, as well as the special legal framework regarding protection in times of conflict. This research has concluded that, although there is in place an international legal framework on the protection of cultural environment, and the religious/cultural wealth of peoples in particular, in reality it is difficult to uphold the existing legal rules in times of hostilities. So, any and all intervention on behalf of the international community has an occasional and suppressive -rather than preventiverole.
Sophianopoulos, Dimitris S. Techno-Press 2000 Structural Engineering and Mechanics, An Int'l Jou Vol.9 No.4
The present study deals with the nonlinear dynamics and stability of autonomous dissipative either imperfect potential (limit point) systems or perfect (bifurcational) non-potential ones. Through a fully nonlinear dynamic analysis, performed on two simple 2-DOF models corresponding to the classes of systems mentioned above, and with the aid of basic definitions of the theory of nonlinear dynamical systems, new important phenomena are revealed. For the first class of systems a third possibility of postbuckling dynamic response is offered, associated with a point attractor on the prebuckling primary path, while for the second one the new findings are chaos-like (most likely chaotic) motions, consecutive regions of point and periodic attractors, series of global bifurcations and point attractor response of always existing complementary equilibrium configurations, regardless of the value of the nonconservativeness parameter.
Killinger, Dimitris Payton,Phongikaroon, Supathorn Korean Radioactive Waste Society 2020 방사성폐기물학회지 Vol.18 No.4
Deionized water, methanol, and ethanol were investigated for their effectiveness at dissolving LiCl-KCl-UCl3 at 25, 35, and 50℃ using inductively coupled plasma mass spectrometry (ICP-MS) to study the concentration evolution of uranium and mass ratio evolutions of lithium and potassium in these solvents. A visualization experiment of the dissolution of the ternary salt in solvents was performed at 25℃ for 2 min to gain further understanding of the reactions. Aforementioned solvents were evaluated for their performance on removing the adhered ternary salt from uranium dendrites that were electrochemically separated in a molten LiCl-KCl-UCl3 electrolyte (500℃) using scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS). Findings indicate that deionized water is best suited for dissolving the ternary salt and removing adhered salt from electrodeposits. The maximum uranium concentrations detected in deionized water, methanol, and ethanol for the different temperature conditions were 8.33, 5.67, 2.79 μg·L-1 for 25℃, 10.62, 5.73, 2.50 μg·L-1 for 35℃, and 11.55, 6.75, and 4.73 μg·L-1 for 50℃. ICP-MS analysis indicates that ethanol did not take up any KCl during dissolutions investigated. SEM-EDS analysis of ethanol washed uranium dendrites confirmed that KCl was still adhered to the surface. Saturation criteria is also proposed and utilized to approximate the state of saturation of the solvents used in the dissolution trials.