1,294 research outputs found
Szovjet hadifogság a kunszentmártoni honvédek szemével
My research area is the history of Kunszentmárton, my hometown, during the two World Wars, as well as World War II letters, diaries and memoirs of the soldiers of Kunszentmárton. In my presentation, I present the memories of the troops who were captured by the Soviets. These recollections are oral interviews between 1989 and 1991. In addition to the interviews, I also examine a memoir written in 2001 by Béla Bozsik of Kunszentmárton. I present an interview with him in 1991, a memoir, and an adjunct to an interview I made with him in October 2015. A close-up memoir of World War II is a valuable resource. During the interviews, local people recall the daily life of captivity, and give an account of the often adventurous journey home. So my work is based on oral history, which I briefly detail as a source. My hypothesis is that the traumatic experience caused to the Hungarian soldiers during the excruciating years of captivity can be felt during my study. They relate their experiences of them, in great detail
CERTAIN COVERINGS OF FINITE HOMOCYCLIC ABELIAN GROUPS
Let G be a finite Abelian group written additively which is the n-fold direct sum of
cyclic groups of order k. Denote A the union of these direct summands of G. Let r(k, n) be
the minimum of the cardinality of subsets
ON THE ACCURACY OF MOBILITY MODELLING IN WIRELESS NETWORKS
In a wireless mobile network, two major
problems arise: poor performance of the wireless layer and effect of
user mobility. The problems related to limited available radio bandwidth and
radio channel errors seem to be solved by CDMA technique applied in 3G
mobile systems. The bandwidth that is provided by CDMA air interface is
enough for present mobile multimedia applications. However such applications
are sensitive to the degradation of QoS parameters. Graceful degradation
could happen when too many mobiles arrive to the same radio cell. To avoid
such situations the Call Admission Control (CAC) has to limit the number of
newly accepted connections. Terminal mobility causes problems in call
admission control because the number of active mobile terminals in a cell is
a random variable. In this paper we introduce a new method to predict the
number of terminals in each cell. Based on this information a more effective
CAC algorithm can be applied in order to ensure user´s satisfaction
A rĂ©z-alumĂnium fĂ©mpár korrĂłziĂłs sajátosságai = Corrosion properties of the copper-tin metal couple
Munkánk során megállapĂtottuk, hogy: - Az alumĂniummal elektromosan vezetĹ‘ kapcsolatban lĂ©vĹ‘ rĂ©z sĂşlyos lyukkorrĂłziĂłs károkat okozhat levegĹ‘n lĂ©vĹ‘, klorid-ionokat tartalmazĂł oldatokban. Ilyen körĂĽlmĂ©nyek között, egyforma nagyságĂş felĂĽlettel rendelkezĹ‘ alumĂniumot is rezet összekapcsolva a közös nyitott áramköri potenciál az alumĂnium lyukkorrĂłziĂłs tartományába esik. - A rĂ©z-ionok hatása hasonlĂł, mivel cementáciĂłval leválnak az alumĂnium felĂĽletĂ©re. - Az oldatok oxigĂ©nmentesĂtĂ©se csökkenti a lyukkorrĂłziĂłs veszĂ©lyt. - Klorid-ion mentes közegben rĂ©z hatására nem tapasztalhatĂł pitting korrĂłziĂł. Ilyen körĂĽlmĂ©nyek között a rĂ©z kevĂ©sbĂ© jelent kockázatot. - Az alumĂnium felĂĽletĂ©n keletkezĹ‘ passzĂválĂł oxidrĂ©teg növelĂ©se - pl. forrĂłvizes kezelĂ©ssel - vĂ©delmet nyĂşjthat a rĂ©z Ă©s a klorid egyĂĽttes hatására jelentkezĹ‘ lyukkorrĂłziĂł ellen. | It has been found that: - The presence of copper galvanically connected to aluminium can result in vigorous pitting corrosion of Al in aerated chloride containing solutions. In such circumstances the common open circuit potential of a coupled Al and Cu having equal surface area usually falls in the region of pitting corrosion of aluminium. - Copper ions have the same effect since copper atoms can be deposited on the surface of aluminium via cementation. - Deaerated solutions can be more favourable in order to avoid pitting corrosion - In chloride ion free electrolyte there was no sign of pitting corrosion in the presence of copper. - Passivation of aluminium surface in boiling water can provide protection against pitting corrosion induced by copper and chloride
Fémek adszorpciója idegen fémfelületeken (gyakorlati vonatkozások) = Underpotential deposition of metals on foreign metal surfaces (practical aspects)
A fĂ©mfelĂĽletkĂ©mia három terĂĽletĂ©vell foglalkoztunk a pályázat idĹ‘tartama alatt. ElĹ‘ször, az alapvetĹ‘ cĂ©lkűzĂ©ssel, a fĂ©madszorpciĂłval (UPD), a rĂ©nium platinán vĂ©gbemenĹ‘ adszorpciĂłjával, továbbá egyĂĽttműködĂ©sben az adszorbeált fĂ©mekkel mĂłdosĂtott katalizátorokkal, Ă©s vĂ©gĂĽl az adszorbált fĂ©meknek az alapfĂ©m korrĂłziĂłs sajátságaira gyakorolt hatásával (kĂ©t Ă©s többfĂ©mes korrĂłziĂł) foglalkoztunk. Másodszor, összefoglalĂł dolgozatokat tettĂĽnk közzĂ© a katĂłdos korroziĂłvĂ©delem működĂ©sĂ©nek jobb elmĂ©leti megalapozása cĂ©ljábĂłl azĂ©rt, hogy ösztönözzĂĽk az eljárás mĂ©g szĂ©lesebbkörű alkalmazását, kĂĽlönös tekintettel a hazai hidak tovább aligha halogathatĂł katĂłdos korrĂłziĂłvĂ©delmĂ©re. A harmadik, terĂĽlet a fĂ©mkorrĂłziĂł terĂĽletĂ©n elĹ‘fordulĂł katalitikus jelensĂ©gek feltárása Ă©s elmĂ©leti megalapozása. Legfontosabb eredmĂ©nyĂĽnk a vas-cink korrĂłziĂłs cella polaritásának megváltozását Ă©rtelmezĹ‘ elmĂ©leti munkánk, mely szerint a jelensĂ©g oka a cink felĂĽletĂ©n kĂ©pzĹ‘dĹ‘ passziválĂł oxidrĂ©teg katalitikusan aktiválja az oxigĂ©nt Ă©s ez a cink elektrĂłdpotenciáljának pozitĂv irányĂş elmozdulását eredmĂ©nyezi. Ă–sszefoglalását adtuk azoknak a folyamatoknak, amelynek eredmĂ©nyekĂ©ppen a fĂ©mkorrĂłziĂł során a dioxigĂ©n (katalitikusan)aktiválĂłdik. MegállapĂtottuk, hogy levegĹ‘s kloridtartalmu oldatban a rĂ©zzel Ă©rintkezĹ‘ alumĂnium lyukkorrĂłziĂłja azonnal elkezdĹ‘dik, OxigĂ©n távollĂ©tĂ©ben ez folyamat nem olyan erĹ‘teljes. Az alunĂnium passziválĂłdása akadályozza ezt a kĂ©tfĂ©mes korrĂłziĂłt. | Iin the course of the grant three fields of metal surface chemistry has been dealt with. First, it was dealt with the basic programme, with metal adsorption (UPD), adsorption rhenium on platinum, then with preparation of catalysts midified by adsorbed metals, and finally with the influence of adsorbed metals on corrosion behaviour of the substrate metal (bimetallic or multimetallic corrosion). Secondly, review papers were published to make a better foundation for cathodic corrosion protection. Our papers aiming at inciting an even more wide application of the method, regarding the cathodic protection of the bridges which hardly can be delayed further. Third, revelation and theoretical foundation of catalytic phenomena in the field of metal corrosion. The most important result in this field is the theoretical interpretation of polarity reversal of Zn-Fe corrosion cell. This phenomenon is caused by the catalytic activation of oxygen by the passivating oxide layer on zinc surface and this process results in a positive shift of electrode potential of the zinc. It has been found that in aerated chloride ion containing solution, pitting corrosion of an Al/Cu bimetallic system, emerged immediately, while in the absence of oxygen this process was less violent. The processes resulting in (catalytic) activation of dioxygen in metal corrosion have been summarized (calling the attention to the catalytic aspects of cathodic processes of metal corrosion)
PROBLEME DER QUALITĂ„TS KONTROLLE VON ERZEUGNISSEN
PROBLEMS OF PRODUCT QTIALITY CONTROL - Quality control is generaIly
expected to show whether, after testing one or several characteristics, a set of products can be
accepted or not. Acceptance of a shipment may be decided over according to different sampling
plans, of which some. likely to be expedient, will be presented beIow. The so-called acceptance
plan type (Po, PI' co' Cl) underlying decision according to function V(p) (acceptance probability)
will be expounded.
FinaIly, the number of sampIe elements needed for thc given (or assumed) acceptance
plan type (Po' PI. Fo ' 2 1) wiII be determined, provided certain conditions have been met
- …