Marine science from cartographic viewpoint: from research to education in Hungary | Tengertan térképészet szemmel: a kutatástól az oktatásig Magyarországon

Két és fél évtizedes magyar kutatások, valamint a témához kapcsolódó külföldi szakirodalom magyar adaptációja és szintézise eredményeképpen, ma már korszerű és elegendő tudással rendelkezünk ahhoz, hogy a tengerfenéknek a szárazföldek leíróföldrajzához hasonló részletességű leírását adjuk. Ez adta az ötletet, hogy kurzust szervezzünk a Miskolci és a Szegedi Egyetemen „Tengertan I. – Morfológia”, illetve „Tengertan térképész szemmel” címmel. Jelen tanulmányban összegzem kutatásaim történetét, hálás tisztelettel Klinghammer István professzor úrnak. A tudományos munkásságomhoz kapcsolódó sikerek két időszakra és két különböző hasznosítási területre oszthatók. Az első időszakban (1974–90) az eredmények gyakorlati hasznosulása jellemző, nem véletlenül, hiszen ekkor a Kartográfiai Vállalat munkatársa voltam. Míg a második – nagyjából az 1990-es évek elején elkezdődött – időszakban az ELTE oktatójaként a kutatás áttevődött az egyetemre, hallgatók bevonásával folyt, de az ezredforduló elejéig „csak” nemzetközi visszhangot is kiváltó elméleti eredmények születtek, az eredmények ugyan folyamatosan beépültek az oktatásba, azonban „látványosabb hasznosításuk” különböző kiadványokban csak 2003 és 2004 folyamán valósulhatott meg. Szükségesnek látom azonban a fizikai oceanográfia eredményeinek térképi szintézisét, összegzését és „honosítását” is. A 2004-ben a Topográf–Nyír-Karta kiadta „Nagy Világatlaszba” elkészítettem a 32 oldalas TENGERFENÉK-DOMBORZAT című fejezetet. A kiadóval további 40 oldalnyi tematikus térképpel kibővített kiadásról 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–Nyír-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

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