4,036 research outputs found
Marine science from cartographic viewpoint: from research to education in Hungary | Tengertan térképészet szemmel: a kutatástól az oktatásig Magyarországon
KĂ©t Ă©s fĂ©l Ă©vtizedes magyar kutatások, valamint a tĂ©mához kapcsolĂłdĂł kĂĽlföldi szakirodalom magyar adaptáciĂłja Ă©s szintĂ©zise eredmĂ©nyekĂ©ppen, ma már korszerű Ă©s elegendĹ‘ tudással rendelkezĂĽnk ahhoz, hogy a tengerfenĂ©knek a szárazföldek leĂrĂłföldrajzához hasonlĂł rĂ©szletessĂ©gű leĂrását adjuk. Ez adta az ötletet, hogy kurzust szervezzĂĽnk
a Miskolci Ă©s a Szegedi Egyetemen „Tengertan I. – MorfolĂłgia”, illetve „Tengertan tĂ©rkĂ©pĂ©sz szemmel” cĂmmel.
Jelen tanulmányban összegzem kutatásaim történetét, hálás tisztelettel Klinghammer István professzor úrnak.
A tudományos munkásságomhoz kapcsolĂłdĂł sikerek kĂ©t idĹ‘szakra Ă©s kĂ©t kĂĽlönbözĹ‘ hasznosĂtási terĂĽletre oszthatĂłk.
Az elsĹ‘ idĹ‘szakban (1974–90) az eredmĂ©nyek gyakorlati hasznosulása jellemzĹ‘, nem vĂ©letlenĂĽl, hiszen ekkor a Kartográfiai Vállalat munkatársa voltam. MĂg a második – nagyjábĂłl az 1990-es Ă©vek elejĂ©n elkezdĹ‘dött – idĹ‘szakban az ELTE oktatĂłjakĂ©nt a kutatás áttevĹ‘dött az egyetemre, hallgatĂłk bevonásával folyt, de az ezredfordulĂł elejĂ©ig „csak” nemzetközi visszhangot is kiváltĂł elmĂ©leti eredmĂ©nyek szĂĽlettek, az eredmĂ©nyek ugyan folyamatosan beĂ©pĂĽltek az oktatásba, azonban „látványosabb hasznosĂtásuk” kĂĽlönbözĹ‘ kiadványokban csak 2003 Ă©s 2004 folyamán valĂłsulhatott meg.
Szükségesnek látom azonban a fizikai oceanográfia eredményeinek térképi szintézisét, összegzését és
„honosĂtását” is. A 2004-ben a Topográf–NyĂr-Karta kiadta „Nagy Világatlaszba” elkĂ©szĂtettem a 32 oldalas
TENGERFENÉK-DOMBORZAT cĂmű fejezetet. A kiadĂłval további 40 oldalnyi tematikus tĂ©rkĂ©ppel kibĹ‘vĂtett kiadásrĂłl
tárgyalunk, a felsőoktatás és a doktorképzés számára.
After having pursued research of marine science for two and half decades, and after having synthesized international literature on this discipline and adapted it to the Hungarian language, we are in possession of a level of modern knowledge sufficient to give a detailed and adequate description of the seafloor, similar to descriptive geography of continents. This gave us the idea to organize a course at the University of Miskolc and Szeged as well with the titles „Marine Science I – Morphology”and „Marine Science from Cartographic Viewpoint”. This paper gives a summary of the history of this research, with grateful respects to Professor István Klinghammer.
My achievements in research can be divided in two periods fundamentally different in practical respect. In the first period (1974–90), when I was working for the Kartográfiai Vállalat, my results were typically utilized in practice. During the second period, which began in the early 1990s, being a lecturer at Eötvös Loránd University, I transferred my research to the university, where several students joined the project. Until the first years of the new millennium, we could „only” achieve theoretical results; although these results elicited international reaction and were incorporated in education, they could be utilized in various publications „spectacularly” only during 2003 and 2004.
I also find the cartographical synthesis, summary and „nationalization” of results of physical oceanography
important. I prepared a chapter of 32 pages with the title „Seafloor Relief”, which was published in 2004 by
Topográf–NyĂr-Karta in their „Great World Atlas”. We are negotiating with the publishing company about a more comprehensive publication including 40 new pages of thematic maps for the university and postgraduate training
Reply to E.G.D. Cohen, L. Rondoni, Physica A 306 (2002) 117
In their paper Cohen and Rondoni severely question the physical relevance of
studies of transport by means of multibaker maps and other classes of dynamics
considering the motion of independen particles - like e.g. the Lorentz gas. We
argue that this is to a large extent due to inappropriate interpretation of the
models. In particular, the arguments concerning the lack of local thermodynamic
equilibrium are inconsistent for the models previously worked out by ourselves.Comment: 3 pages, revtex4 -- with a 4th item addresse
Tribological behavior of composite-steel on rolling/sliding contacts for various loads
Composites have replaced metals in the bearing industry for the exclusive performances from its properties were it can accommodate resins, fabrics and additives. Roll-slip is common behaviors in application were non-conformal contact exhibits like bearings, rollers and cams. Two elements control the tribological behavior of the material which is the rolling and the sliding element. Composite-steel contacts were tested using a twin-disc setup with open tribo-system to study the influence of load on the frictional behavior of the polymer composites. The contacts were tested with four different loads under 20% slip ratio for a regular interval of time. The curves from the friction force with respect to different loads follows a tendency of linear increase in friction force were the rolling resistance is the dominating mechanism. For the given condition the macro level investigations shows the absence of transfer layer on the steel counterparts. The tendency of the friction curve and the micrograph explicitly deliberates the involvement of abrasion and adhesion in the harder polymer from metal counterpart. The temperature variable is isolated in case of the above research. The examination of the contact surface reveals the formation of craters on the junction of polymer and textile
Self interaction of spins in binary systems
Beyond point mass effects various contributions add to the radiative
evolution of compact binaries. We present all the terms up to the second
post-Newtonian order contributing to the rate of increase of gravitational wave
frequency and the number of gravitational wave cycles left until the final
coalescence for binary systems with spin, mass quadrupole and magnetic dipole
moments, moving on circular orbit. We evaluate these contributions for some
famous or typical compact binaries and show that the terms representing the
self interaction of individual spins, given for the first time here, are
commensurable with the proper spin-spin contributions for the recently
discovered double pulsar J0737-3039.Comment: 6 pages, Proceedings of the Albert Einstein Century International
Conference, Paris, France, 18-22 July, 200
Entropy rate of message sources driven by quantum walks
The amount of information generated by a discrete time stochastic processes
in a single step can be quantified by the entropy rate. We investigate the
differences between two discrete time walk models, the discrete time quantum
walk and the classical random walk in terms of entropy rate. We develop
analytical methods to calculate and approximate it. This allows us to draw
conclusions about the differences between classical stochastic and quantum
processes in terms of the classical information theory.Comment: 12 pages, 4 figure
Marsigli’s map of the Gulf of Lion
Luigi Ferdinando Marsigli, Italian warfare engineer, was born 350 years ago (*July
20, 1658, Bologna, †November 1, 1730, Bologna). His cartographic activity had many
goals, from the mapping of the border of the Kingdom of Hungary (and also the Habsburg
Empire) to the survey of the Danube River. Besides of these works, he surveyed
the Gulf of Lion, at the southern shores of France, between 1706 and 1708, in connection
with the Spanish War of Succession. This work, which is exactly 300 years old,
has importance in the history of cartography and the marine exploration too. In present
context, it is the first survey of this part of the continental shelf in a large, open bay
near to the continent. He presented just one isobath at the depth of 60-70 brasses. Our
analysis shows that this bears early and quite precise information about the location
of the shelf escarpment
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