15 research outputs found
Centrális eredetű tremorok generátorainak vizsgálata klinikai elektrofiziológiai módszerekkel = Clinical electrophysiological investigation of tremors with central origin
LĂ©trehoztunk egy olyan internetes adatbázist, mellyel a tremorral járĂł idegrendszeri betegsĂ©gekben szenvedĹ‘k adatainak feldolgozását követĹ‘en homogĂ©n betegcsoportok alakĂthatĂłk ki. Tremorometriás vizsgálatokkal igazoltuk, hogy a tremor frekvencia-paramĂ©terei Parkinson-betegsĂ©gben jellegzetesen aszimmetrikusak, mĂg esszenciális tremorban (ET) mindkĂ©t oldalon hasonlĂł eltĂ©rĂ©st mutatnak, fĂĽggetlenĂĽl a tremor intenzitásátĂłl. Ez arra utal, hogy Parkinson-kĂłrban a kĂ©t fĂ©ltekĂ©ben egymástĂłl fĂĽggetlenĂĽl, mĂg ET-ban egymással kapcsoltan működĹ‘ tremorgenerátorkör feltĂ©telezhetĹ‘. Kimutattuk, hogy ET-ban az kĂ©zmozgások ritmusossága mindkĂ©t oldalon zavart szenved, mely cerebelláris működĂ©szavart igazol, Ă©s alátámasztja, hogy az ET nem monoszimptĂłmás betegsĂ©g, hanem több funkcionális rendszert Ă©rintĹ‘ komplex kĂłrkĂ©p. BizonyĂtottuk, hogy a krĂłnikus valproát kezelĂ©s mĂ©g azokban a betegekben is mĂłdosĂtja a tremor frekvencia-teljesĂtmĂ©ny spektrumot, akiknĂ©l nincsen klinikailag kimutathatĂł intenzitásĂş tremor. Mivel a valproát befolyásolja mind a bazális ganglionok mind pedig a cerebellum GABAerg működĂ©sĂ©t, feltehetĹ‘, hogy a kĂĽlönbözĹ‘ tĂpusĂş tremorokban ezen pályarendszerek is Ă©rintettek. Igazoltuk, hogy Parkinson-kĂłrban, ET-ban Ă©s Wilson-kĂłrban a mozgást követĹ‘ EEG bĂ©ta szinkronizáciĂł latenciája ill. nagysága változik az egĂ©szsĂ©gesekhez kĂ©pest, ami arra utal, hogy a szupplementer ill. premotor kĂ©rgi terĂĽletek rĂ©szei a fenti kĂłrkĂ©pekben megjelenĹ‘ tremorok generátorköreinek. | In the present project we have established an internet based database, which helps us to generate homogeneous groups of patients with various tremor types. We have proved using complex tremorometry that the frequency parameters of Parkinson-tremor are characteristically asymmetric, while in essential tremor (ET) these are altered on both sides, and these changes are not related of tremor intensity. These data suggest that in Parkinson's disease the tremor generators in the two hemispheres are not connected, however in ET these might be interconnected. We have shown that in ET the rhythmicity of alternating hand movements are altered on both sides, which might be related to cerebellar dysfunction, and suggests that essential tremor affects several functional systems of the brain. We have demonstrated that chronic valpoate treatment alters the tremor frequency parameters even in those patients who have no clinically noticeable symptoms. Since valproate influences the GABAergic functions of the basal ganglia and the cerebellum, our data might suggest, that these circuitries are involved in the generation of various tremor types. We have described that in Parkinson's disease, in ET and in Wilson's disease the latency and/or amplitude of EEG post-movement beta synchronization is affected compared to the control group. This implies that the suplementer and premotor cortical areas are part of the generator circuitry of the above mentioned tremors
Qualitative Analysis of Carbon Emissions and Offsetting Opportunities of Zalaegerszeg Automotive Proving Ground
The aim of this paper is to provide an overview about the efforts of the management board of the Automotive Proving Ground in Zalaegerszeg to decrease carbon effects, which is in a close relation with the project level sustainability opportunities of this special investment. Based on the research work we have done, solutions were proposed to achieve the vision of "net zero (or negative) emissions" of this project. In the investigations concerning the test track, system boundaries were defined such that all relevant facilities and processes operating were considered. In emissions calculations, we have employed the procedure outlined by the GHG Protocol for 3 scopes and the employed methodology relied heavily on the related standard. For the calculations, the definition and collection of input data types was the first step. Then the assessment has been conducted by taking into consideration the geometric shape of test platforms, anticipated vehicle loading of track elements, typical distance-speed diagrams, as well as the utilized vehicle types (passenger cars, trucks and buses). We calculated CO2-equivalent emissions from gasoline and diesel fuel consumptions (from the product of fuel demand and conversion factors), using "Tank-to-Wheels" and "Well-to-Wheels" approaches. Based on the emission calculations carbon offsetting opportunities were analyzed to assume the effect of CO2 emissions reduction and capture: forestation and green surface development; energy crop plantation and heat generation; establishment of a photovoltaic (PV) farm (electricity production). We have shown the main characteristics of the 3 main options and their advantages and disadvantages
DiszkrĂ©t Ă©s folytonos: a gráfelmĂ©let, algebra, analĂzis Ă©s geometria találkozási pontjai = Discrete and Continuous: interfaces between graph theory, algebra, analysis and geometry
Sok eredmĂ©ny szĂĽletett a gráfok növekvĹ‘ konvergens sorozataival Ă©s azok limesz-objektumaival, ill. az ezek vizsgálatára szolgálĂł gráf-algebrákkal kapcsolatban. Kidolgozásra kerĂĽltek a nagyon nagy sűrű gráfok (hálĂłzatok) matematikai elmĂ©letĂ©nek alapjai, Ă©s ezek alkalmazásai az extremális gráfelmĂ©let terĂĽletĂ©n. AktĂv Ă©s eredmĂ©nyes kutatás folyt a diszkrĂ©t matematika más, klasszikus matematikai terĂĽletekkel valĂł kapcsolatával kapcsolatban: topolĂłgia (a topolĂłgiai mĂłdszer alkalmazása gráfok magjára, ill a csomĂłk elmĂ©lete), geometriai szerkezetek merevsĂ©ge (a Molekuláris SejtĂ©s bizonyĂtása 2 dimenziĂłban), diszkrĂ©t geometriai (Bang sejtĂ©sĂ©nek bizonyĂtása), vĂ©ges geometriák (lefogási problĂ©mák, extremális problĂ©mák q-analogonjai), algebra (fĂ©lcsoport varietások, gráfhatványok szĂnezĂ©se), számelmĂ©let (additĂv számelmĂ©let, Heilbronn problĂ©ma), továbbá gráfalgoritmusok (stabilis párosĂtások, biolĂłgiai alkalmazások)) terĂĽletĂ©n. | Several results were obtained in connection with convergent growing sequences of graphs and their limit objects, and with graph algebras facilitating their study. Basic concepts for the study of very large dense graphs were worked out, along with their applications to extremal graph theory. Active and successful research was conducted concerning the interaction of discrete mathematics with other, classical areas of mathematics: topology (applications of topology in the study of kernels of graphs, and the theory of knots), rigidity of geometric structures (proof of the Molecular Conjecture in 2 dimensions), discrete geometry (proof of the conjecture of Bang), finite geometries (blocking problems, q-analogues of extremal problems), algebra (semigroup varieties, coloring of graph powers), number theory (additive number theory, heilbronn problem), and graph algorithms (stable matchings, applications in biology)
Hepatitis C-vĂrussal fertĂ´zött cirrhosisos betegek kezelĂ©sĂ©vel nyert hazai real-life tapasztalatok a kĂ©t pegilált interferonnal
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How do bottom-up innovations spread between schools and districts? An actor-container model of educational innovation diffusion
The present paper deals with a research methodology issue. After an introductory literature review, it presents a novel model developed to study the diffusion of educational innovations. This model does not focus on the time course, phases, or characteristics of diffusion, which can be described by various innovation indicators, but on persistent structural elements such as the actors, their relationships, and the territorial, organizational, or other entities that host the actors. The latter, which separate the actors from each other or even constitute a common space for them are called containers. The presented actor-container model (ACM) was developed to help interpret empirical data in the context of a larger research, named Innova project, dealing with the emergence, diffusion, and system-shaping impact of bottom-up innovations initiated by teachers or other local actors in the education sector. In this paper, we demonstrate the application of ACM by analyzing the responses of educational institutions (organizations) at different levels of public and higher education in Hungary, based on the 2018 online questionnaire survey database ( N = 2042). The examples presented show that ACM provides a unique perspective for research on innovation diffusion by shedding new light on actors and containers, opening up new possibilities for data analysis and results interpretation. We believe that ACM can be applied not only in the context of educational innovations but also in other innovation fields
Mikroelem-terhelés hatása a napraforgóra karbonátos csernozjom talajon
Mikroelem-terhelĂ©ses kisparcellás szabadföldi kĂsĂ©rletĂĽnk 8. Ă©vĂ©ben napraforgĂł jelzĹ‘növĂ©nyt termesztettĂĽnk. A löszön kĂ©pzĹ‘dött vályog karbonátos csernozjom talaj szántott rĂ©tege 5 % CaCO3- Ă©s 3 % humusztartalommal rendelkezett. A 13 vizsgált mikroelemet 1991 tavaszán szántottuk be 0, 90, 270, 810 kg/ha mennyisĂ©gben. A 13 x 4 = 52 kezelĂ©st 2 ismĂ©tlĂ©sben állĂtottuk be 104 parcellán split-plot elrendezĂ©sben. FĹ‘bb eredmĂ©nyeink az alábbiakban foglalhatĂłk össze: Talajvizsgálatokkal a terhelĂ©s csak rĂ©szben Ă©s elemenkĂ©nt eltĂ©rĹ‘ mĂłdon becsĂĽlhetĹ‘ utĂłlag. A cc. HNO3 + cc. H2O2 mĂłdszerrel pl. a Cu, Se, As, Hg 60-90 %-a, a Cr, Cd, Mo 30-60 %-a volt kimutathatĂł a kĂsĂ©rlet 4. Ă©ve után a szántott rĂ©tegben. A 13 vizsgált elembĹ‘l csupán a Cd Ă©s Se bizonyult toxikusnak a napraforgĂłra. A növekvĹ‘ Cd-terhelĂ©s gátolta a magkĂ©pzĹ‘dĂ©st, csökkentette az olaj %-át a magban Ă©s az olajhozamot. A 270 kg/ha feletti Se-terhelĂ©s nyomán az állomány kiritkult, kipusztult Ă©s magtermĂ©s alig, vagy egyáltalán nem kĂ©pzĹ‘dött. Az As, Cr, Cu, Hg, Pb mozgása gátolt e termĹ‘helyen a talaj-növĂ©ny rendszerben. MĂ©rsĂ©kelt akkumuláciĂłt mutatott a növĂ©ny szerveiben a Cd, Ba, Ni, Sr Ă©s Zn, extrĂ©m dĂşsulást a Mo Ă©s Se jelzett. NövĂ©nyi szennyezĂ©s egĂ©szsĂ©gĂĽgyi határkoncentráciĂł tĂşllĂ©pĂ©sĂ©t, állati vagy emberi fogyasztásra alkalmatlan termĂ©ket eredmĂ©nyezett a Cd-, Mo-, Se- Ă©s feltehetĹ‘en a nagyobb Hg-kezelĂ©sekben. ErĹ‘sen szennyezett talajon is, a teljes föld feletti biomasszába kerĂĽlt szennyezĹ‘ elemek mennyisĂ©ge elenyĂ©szĹ‘ maradt. A maximális 810 kg/ha terhelĂ©s remediáciĂłja hasonlĂł körĂĽlmĂ©nyek között az As esetĂ©ben pl. 93 ezer Ă©vet, a Cd esetĂ©ben 8-9 ezer Ă©vet, a Se esetĂ©ben elmĂ©letileg 477 esztendĹ‘t venne igĂ©nybe. FitoremediáciĂł az enyhĂ©bb diffĂşz szennyezĂ©snĂ©l jöhet szĂłba, amennyiben megfelelĹ‘ hiperakkumulátor növĂ©nyfaj Ă©s termesztĂ©si technika is rendelkezĂ©sre áll
Erdős centennial
Paul Erdös was one of the most influential mathematicians of the twentieth century, whose work in number theory, combinatorics, set theory, analysis, and other branches of mathematics has determined the development of large areas of these fields. In 1999, a conference was organized to survey his work, his contributions to mathematics, and the far-reaching impact of his work on many branches of mathematics. On the 100th anniversary of his birth, this volume undertakes the almost impossible task to describe the ways in which problems raised by him and topics initiated by him (indeed, whole branches of mathematics) continue to flourish. Written by outstanding researchers in these areas, these papers include extensive surveys of classical results as well as of new developments