125 research outputs found
Transformations in the Carpathian Basin around 1600 B. C.
Um die Zeit des Vulkanausbruchs von Thera fanden wichtige
VerÀnderungen im Karpatenbecken statt. Diese sogenannte
Koszider Epoche korrespondiert mit der letzten Phase der
mittleren Bronzezeit in der ungarischen Terminologie und
stellt den Ăbergang zur spĂ€ten Bronzezeit dar. Die Untersuchung
dieser Epoche hat sich bisher als kontrovers erwiesen
â sowohl unter ungarischen als auch mitteleuropĂ€ischen Wissenschaftlern.
Erst in den letzten Jahren ist diese Epoche nicht
mehr als kurzer Zeitraum, mit der ein bestimmtes historisches
Ereignis verbunden werden kann, interpretiert worden.
Vielmehr sieht man sie nun als eine lÀnger dauernde Periode
an, welche die BlĂŒtezeit der mittleren Bronzezeit im Karpatenbecken
markiert und die mit einschneidenden VerÀnderungen
endet.
Die Hauptelemente dieses Wandels sind allerdings noch
unklar. Unser Ziel ist es, den Wandel durch den Vergleich verschiedener
Aspekte dreier aufeinanderfolgender Phasen zu
untersuchen. Am Ende sollen einige neue ErwÀgungen stehen,
die die bisherigen Interpretationen dieser VerÀnderungen
erweitern können. | Around the time of the Thera eruption important transformations
occurred in the Carpathian Basin. This is the so-called
Koszider Period, which corresponds to the last phase of the
Middle Bronze Age (MBA) in the Hungarian terminology and
represents a transition to the Late Bronze Age. The assessment
of the period has been controversial among both Hungarian
and central European scholars. In the past few years
this period has been interpreted not as a short »horizon« connected
to a specific historical event, but as a longer period
that represented the heyday of the MBA in the Carpathian
Basin, which ended with significant transformations. The
main elements of this transformation, however, are still unclear.
Our aim is to investigate this transformation through
the comparison of several aspects of three subsequent phases
and to amend the previously offered interpretations of the
changes with a few new considerations
IMPLEMENTATION AND UNIFORM MANAGEMENT OF MODELLING ENTITIES IN A MASSIVELY FEATURE-OBJECT ORIENTED ADVANCED CAD ENVIRONMENT
Today we are spectators of the transition process in computer aided design from traditional geometry based on design systems to advanced computer-based engineering systems. The key is the feature technology that allows both integrating and managing modelling entities in a coherent way. Feature technology is developing rapidly. New research topics and contexts are emerging from time to time. This paper introduces concept, design and technological feature-objects to support operational, structural and morphological modelling of mechanical products. First, the feature-centred approaches to conceptual design are summarized and evaluated. Then an implementation of concept feature-objects and the methodology for using them is presented. The strength of concept feature-objects is in their morphology inclusive nature. They appear as parametrized three-dimensional
skeletons providing geometrical representations for the modelled engineering conceptions. A concept feature-object models the physical ports, contact surfaces related to ports, bones between ports, DOF of ports, relevant physical parameters, scientific and empirical descriptions of intentional transformations and environmental effects. Concept feature-objects are related to design feature-objects that, in turn, are constructed of a relevant
set of technological feature-entities. Concept feature-objects refer to the configurable and parametrized design feature-objects through an indexing mechanism. The conceptions have been tested during the programming and further development of the authors' PRODES system
Pathogenicity of a bovine viral diarrhoea virus strain in pregnant sows: Short communication
The biological properties of bovine viral diarrhoea virus (BVDV) strain Oregon C24V were studied after intranasal and subcutaneous infection of pregnant sows. This virus strain is widely used in Hungary for immunising cattle against bovine viral diarrhoea (BVD). Based upon the results of the clinical, gross pathological, histopathological and virological examinations it can be established that the given strain caused asymptomatic infection and serological conversion in sows that were in the second third of gestation. The virus caused clinically apparent disease in some of the piglets born at term, which indicates that it had crossed the placenta. More than half (57%) of the live-born piglets died within 60 days of birth. The sows and their progeny did not shed the virus. BVDV infection has great differential diagnostic importance in pigs, as classical swine fever (CSF) virus strains of reduced virulence cause similar clinical symptoms and gross and histopathological changes
Laser-plasma harmonics with high-contrast pulses and designed prepulses
One aspect of the complexity of mid- and high-harmonic generation in high-intensity laser-plasma interactions is that nonlinear hydrodynamics is virtually always folded together with the nonlinear optical conversion process. We have partly dissected this issue in picosecond and subpicosecond interactions with preformed plasma gradients, imaging and spectrally resolving low- and mid-order harmonics. We describe spatial breakup of the picosecond beam in preformed plasmas, concomitant broadening and breakup of the harmonic spectrum, presumably through self-phase modulation, together with data on the sensitivity of harmonics production efficiency to the gradient or extent of preformed plasma. Lastly, we show preliminary data of regular Stokes-like and anti-Stokes-like satellites to the harmonics, accompanied by modification of the forward-scattered beam. © 1998 American Institute of Physics.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87448/2/342_1.pd
Effect of low-dose zearalenone exposure on luteal function, follicular activity and uterine oedema in cycling mares
The effect of 10-day zearalenone administration starting 10 days after ovulation was studied in 6 cycling trotter mares in the summer period. After an entire oestrous cycle (Cycle 1), mares were given 7 mg purified zearalenone per os daily (1 mg/ml in ethyl alcohol) beginning on Day 10 of Cycle 2. Toxin exposure was continued until the subsequent ovulation. Luteal function and follicular activity were monitored daily by rectal palpation, ultrasonography and blood sampling for progesterone. During toxin exposure, all animals were in good physical condition. The toxin had no effect on the length of the interovulatory intervals, luteal and follicular phases. It did not influence significantly the plasma progesterone profiles (logistic curve parameters A1 to A6), the follicular activity (growth rate, maximum size of the ovulatory follicles, maximum number and the time of first increase in the number of large follicles) and the uterine oedema. It is concluded that in cyclic mares the methods used in this study could not detect any adverse effect of zearalenone (administered at a low dose similar to natural exposure) on reproduction
Middle Bronze Age humidity and temperature variations, and societal changes in East-Central Europe
Archaeological evidence points to substantial changes in Bronze Age societies in the European-Mediterranean region. Isotope geochemical proxies have been compiled to provide independent ancillary data to improve the paleoenvironmental history for the period of interest and support the interpretation of the archaeological observations. In addition to published compositions, in this study we gathered new H isotope data from fluid inclusion hosted water from a stalagmite of the TriĂł Cave, Southern Hungary, and compared the H isotope data with existing stable isotope and trace element compositions reported for the stalagmite. Additionally, animal bones and freshwater bivalve shells (Unio sp.) were collected from Bronze Age archaeological excavations around Lake Balaton and their stable C and O isotope compositions were measured in order to investigate climate changes and lake evolution processes during this period. The data indicate warm and humid conditions with elevated summer precipitation around 3.7 cal ka BP (Before Present, where present is 1950 CE), followed by a short-term deterioration in environmental conditions at about 3.5 cal ka BP. The environment became humid and cold with winter precipitation dominance around 3.5 to 3.4 cal ka BP, then gradually changed to drier conditions at âŒ3.2 cal ka BP. Significant cultural changes have been inferred for this period on the basis of observations during archaeological excavations. The most straightforward consequences of environmental variations have been found in changes of settlement structure. The paleoclimatological picture is well in line with other East-Central European climate records, indicating that the climate fluctuations took place on a regional scale
A hisztériåval kapcsolatos diskurzusok tanulsågai a szomatizåciós jelenségek és a betegségmagatartås megértéséhez = The relevance of discourses about hysteria in the understanding of somatization phenomena and illness behaviour
Napjainkban a magatartĂĄstudomĂĄnyok kĂ©pviselĆinek egyszerre kell szĂĄmolniuk a betegsĂ©gekkel kapcsolatos bizonyossĂĄg Ă©s tudĂĄs konfliktusait elĆhĂvĂł medikalizĂĄciĂłs-technicizĂĄciĂłs orvostudomĂĄnyi tendenciĂĄkkal Ă©s a tĂĄrsadalomtudomĂĄnyok ezekre reflektĂĄlĂł, kritikai Ă©s âposztmodernâ megközelĂtĂ©seivel. EbbĆl adĂłdĂłan igen fontos kihĂvĂĄskĂ©nt jelentkezik az interdiszciplinĂĄris megközelĂtĂ©s szĂŒksĂ©gessĂ©ge. KĂŒlönösen Ăgy van ez a nehezen definiĂĄlhatĂł betegsĂ©gek - a szomatizĂĄciĂłs Ă©s pszichoszomatikus zavarok - esetĂ©ben, ahol a betegsĂ©gmagatartĂĄs gyakorlati problĂ©mĂĄi, tovĂĄbbĂĄ a tĂŒnetek, a diagnĂłzisok Ă©s a szenvedĂ©s âvalĂłdisĂĄgĂĄnakâ episztemolĂłgiai kĂ©rdĂ©sei egyszerre vannak jelen. Az utĂłbbi mĂĄsfĂ©l Ă©vtized kritikai tĂĄrsadalomtudomĂĄnyi kutatĂĄsaiban rendkĂvĂŒli figyelmet kapott a szomatizĂĄciĂłs zavarok Ă©s a klasszikus pszichoszomatikus kĂłrkĂ©pek elĆdjĂ©nek szĂĄmĂtĂł hisztĂ©ria kĂ©rdĂ©sköre. A tanulmĂĄny a szakmai Ă©s laikus szĂłhasznĂĄlatban nem hivatalosan mĂĄig tovĂĄbb Ă©lĆ betegsĂ©ggel kapcsolatos tĂĄrsadalomtudomĂĄnyi Ă©s orvosi megközelĂtĂ©sek közĂŒl azokat mutatja be, amelyek szempontokkal szolgĂĄlhatnak a szomatizĂĄciĂłs Ă©s pszichoszomatikus kĂłrkĂ©pek, valamint a velĂŒk kapcsolatos Ă©rzelmi Ă©s viselkedĂ©ses reakciĂłk elemzĂ©sĂ©hez Ă©s megĂ©rtĂ©sĂ©hez
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