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1
Content available Symmoriiform sharks from the Pennsylvanian of Nebraska
Ginter M.
Acta Geologica Polonica
|
2018
|
Vol. 68, no. 3
391--401
EN
The Indian Cave Sandstone (Upper Pennsylvanian, Gzhelian) from the area of Peru, Nebraska, USA, has yielded numerous isolated chondrichthyan remains and among them teeth and dermal denticles of the Symmoriiformes Zangerl, 1981. Two tooth-based taxa were identified: a falcatid Denaea saltsmani Ginter and Hansen, 2010, and a new species of Stethacanthus Newberry, 1889, S. concavus sp. nov. In addition, there occur a few long, monocuspid tooth-like denticles, similar to those observed in Cobelodus Zangerl, 1973, probably representing the head cover or the spine-brush complex. A review of the available information on the fossil record of Symmoriiformes has revealed that the group existed from the Late Devonian (Famennian) till the end of the Middle Permian (Capitanian).
2
Content available Middle Devonian thelodont Australolepis sp. (Thelodonti) from the Skały Formation, Holy Cross Mountains, Poland
Turner S., Ginter M.
Acta Geologica Polonica
|
2018
|
Vol. 68, no. 3
467--473
EN
Sparse fish microremains have been found in marine limestones from the Middle Devonian (Givetian) Skały Formation (Sitka Coral-Crinoid Limestone Member and Sierżawy Member), Świętomarz–Śniadka section, Bodzentyn Syncline, Łysogóry Region, northern Holy Cross Mountains, associated with conodonts of the hemiansatus to ansatus zones. Thelodont scales referred here to Australolepis sp. cf. A. seddoni come from near Śniadka village, from samples dated as hemiansatus to rhenanus/varcus zones. This increases the known range for the genus from its original find in Western Australia. The presence of a thelodont in the late Middle Devonian in Poland extends the known distribution of turiniids around the peri-Gondwana shorelines of Palaeotethys.
3
Content available A classic Late Frasnian (Devonian) chondrichthyan assemblage from southern Belgium
Ginter M., Gouwy S., Goolaerts S.
Acta Geologica Polonica
|
2017
|
Vol. 67, no. 3
381--392
EN
Samples from the Upper Frasnian (Devonian) of Lompret Quarry and Nismes railway section in Dinant Synclinorium, southern Belgium, yielded several chondrichthyan teeth and scales. The teeth belong to three genera: Phoebodus, Cladodoides and Protacrodus. The comparison with selected Late Frasnian chondrichthyan assemblages from the seas between Laurussia and Gondwana revealed substantial local differences of taxonomic composition due to palaeoenvironmental conditions, such as depth, distance to submarine platforms, oxygenation of water, and possibly also temperature. The assemblage from Belgium, with its high frequency of phoebodonts, is the most similar to that from the Ryauzyak section, South Urals, Russia, and the Horse Spring section, Canning Basin, Australia.
4
Content available The heterodonty in euselachian sharks from the Pennsylvanian of Nebraska
Ginter M.
Acta Geologica Polonica
|
2016
|
Vol. 66, no. 3
299--312
EN
Among the rich material of chondrichthyan microremains from the Indian Cave Sandstone (Upper Pennsylvanian, Gzhelian) near Peru, Nebraska, USA, housed at the Carnegie Museum of Natural History, there occur almost sixty teeth representing Euselachii. They belong to at least seven species, presenting various types of heterodonty. Two new species are described, viz. Ossianodus nebraskensis gen. et sp. nov., whose dentition is similar to that of certain Mesozoic hybodonts, and Sphenacanthus tenuis sp. nov. with minute teeth of protacrodont design. Most of the euselachian teeth served to crush or grind prey, and some had the potential to clutch, but cutting teeth are absent from the fauna.
5
Content available Światłowodowy czujnik natężenia prądu elektrycznego wykorzystujący żródło światła o długości fali 1550 nm
Ginter M.
TTS Technika Transportu Szynowego
|
2015
|
R. 22, nr 12
2535--2539, CD
PL
W artykule omówiona została zasada działania światłowodowego czujnika polarymetrycznego wykorzystującego efekt Faradaya, który zmienia płaszczyznę polaryzacji liniowo spolaryzowanego światła w wyniku oddziaływania płynącego w przewodniku prądu elektrycznego. Zaproponowano układ pomiarowy, w którym do otrzymania wiązki jednomodowej o długości fali 1550nm użyto lasera wielomodowego i światłowodowej siatki Bragga. Zaprezentowano wyniki pomiarów prądu sinusoidalnie zmiennego z wykorzystaniem zaproponowanego rozwiązania układowego. Podano podstawowe parametry metrologiczne światłowodowego czujnika prądu zbudowanego dla długości fali 1550 nm. Zastosowano zaproponowany układ optyczny do pomiarów prądów o przebiegach sinusoidalnych o częstotliwości sieciowej i amplitudach z zakresu od 50A do 1000A.
EN
In this article the fiber optics polarimetric current sensor using Faraday effect, which changes the polarization plane of linear polarized light is presented. The measuring system in which to obtain a single-mode beam having a wavelength of 1550 nm multimode laser and fiber Bragg gratings was used is proposed. The results of sinusoidal current measurements using the proposed solution of electric current sensor are presented. The basic metrological parameters of fiber optic current sensor built on wavelength 1550nm are provided. Which was built was the optical system used to measure currents with sinusoidal waveforms network frequency and amplitude range from 50A to 1000A.
6
Analiza pracy różnych konfiguracji polarymetrycznego czujnika natężenia prądu elektrycznego
Ginter M.
Logistyka
|
2014
|
nr 6
3913--3922
PL
W pracy zaprezentowano światłowodowy czujnik polarymetryczny wykorzystujący efekt Faradaya zmieniający płaszczyznę polaryzacji światła liniowo spolaryzowanego pod wpływem oddziaływania płynącego prądu w przewodniku. Przedstawiono wyniki analizy wpływu indukowanej dwójłomności w światłowodzie jednomodowym na podstawowe parametry opisujące polaryzację na wyjściu czujnika prądu. Do analizy stanu polaryzacji wykorzystano macierze Jonasa opisujące wszystkie elementy toru optycznego. Dokonano obliczeń numerycznych parametrów stanu polaryzacji: natężenie światła, azymutu i eliptyczność wiązki wyjściowej dla trzech konfiguracji polarymetrycznego czujnika natężenia prądu. Przedstawione wyniki badań stanowią materiał źródłowy przy wyborze konkretnego układu pomiarowego światłowodowego czujnika prądu wykorzystującego polarymetr.
EN
In this latter the fiber optics polarimetric current sensor using Faraday effect, which changes the polarization plane of linear polarized light is presented. The results of analysis of the impact of linear birefringence induced in singlemode fiber on the basic parameters describing the polarization on the output of the current sensor were described. For the analysis of the state of polarization on the output of the sensor the Jones matrix which describe all the elements of the optical circuit were used. The numerical parameters of the state of polarization of light intensity, azimuth and ellipticity of the output beam for the three configurations polarimetric sensor current were calculated. The results are the basis to the selection of a particular measurement system using fiber optic current sensor polarimeter.
7
Content available Światłowodowy czujnik polarymetryczny do pomiaru prądu
Ginter M.
Pomiary Automatyka Kontrola
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2011
|
R. 57, nr 3
274-276
PL
W pracy przedstawiono światłowodowy czujnik polarymetryczny wykorzystujący efekt Faradaya zmieniający płaszczyznę polaryzacji światła liniowo spolaryzowanego pod wpływem oddziaływania płynacego prądu w przewodniku. Zaprezentowano wyniki analizy wpływu indukowanej dwójłomności w światłowodzie jednomodowym na podstawowe parametry opisujące polaryzacje na wyjściu czujnika prądu. Przedstawiono wyniki badań eksperymentalnych proponowanego rozwiązania. Podano charakterystykę przetwarzania i czułość czujnika dla prądu elektrycznego o częstotliwości sieciowej, określono niepewność czujnika w zakresie wartości skutecznych prądu, która jest nie większa niż 2%. Czujnik ten zastosowano do pomiaru prądu sinusoidalnie zmiennego o amplitudach od 0 do 700 A i o częstotliwości 50 Hz.
EN
In this paper a fiber-optic polarimetric current sensor using the Faraday effect changing the polarization plane of linear polarized light is presented. The analysis results of the impact of linear birefringence induced in a singlemode fiber on the basic parameters describing polarization at the current sensor output are described. For the analysis of the polarization state at the sensor output, the Jones matrices describing all the elements of the optical circuit were used. The sensor consists of an FSM633 He-Ne laser (of 633 nm wavelength) made by NewPort. The coil has 25 convolutions and diameter of 5 cm. The fiber optic was spun 15 times per meter (15 turns/m) to reject the linear birefringence which is induced as the result of flexing the fiber. The experimental investigations of the proposed solution were carried out on a measuring position specially constructed for this type of measurements in which alternating currents were generated by a short circuit transformer. The investigation results are given in the paper. The current was measured within the range from 0 to 700A. The characteristics of processing, the sensor sensitivity for the power frequency current and the sensor uncertainty within the range of efficient current values which is not higher than 2% are also presented in the paper.
8
Content available remote Early Carboniferous chondrichthyans from the Mobarak Formation, Central Alborz Mountains, Iran
Habibi T., Ginter M.
Acta Geologica Polonica
|
2011
|
Vol. 61, no. 1
27-34
EN
Well exposed Tournaisian, mainly carbonate, rocks of the Mobarak Formation in the area of Shahmirzad village, Central Alborz, Iran, yielded almost 200 chondrichthyan teeth and scales, associated with numerous actinopterygian microremains. Ten different taxa were recognised among the chondrichthyan teeth, of which the most abundant are those representing Euselachii (Protacrodus and Lissodus), Symmoriiformes (Denaea), and Phoebodontiformes (Thrinacodus). The high relative abundance of protacrodont crushing teeth, but lack of holocephalian dental elements suggest that the sediments forming the Shahmirzad section were deposited in a shallow shelf environment, but probably not on a carbonate platform.
9
Content available remote Chondrichthyan microfossils from the Famennian and Tournaisian of Armenia
Ginter M., Hairapetian V., Grigoryan A.
Acta Geologica Polonica
|
2011
|
Vol. 61, no. 2
153-173
EN
The assemblages of chondrichthyan microremains from the Famennian of Armenia show great resemblances to those from central Iran. Particularly, the very rich sample (almost 200 teeth) from the lower Famennian of Ertych contains a fauna similar to that from the Iranian section of Hutk, and the sample from the upper Famennian of Khor Virap has its counterpart in the sample from Dalmeh, Iran. Only one chondrichthyan taxon definitely unknown from Iran, Ertychius intermedius gen. et sp. nov., was recorded. The other newly described species, Lissodus lusavorichi sp. nov., was noted earlier from Dalmeh, but at that time was left unnamed. It appears that the same type of relatively shallow marine environment predominated in the central and north-western parts of the Iranian Platform during the Famennian and that in a given time-interval the same type of ichthyofauna was distributed throughout the area. The single lower Tournaisian sample from the Sevakavan section yielded a peculiar form of thrinacodont teeth, possibly intermediate between Thrinacodus tranquillus and Th. ferox.
10
Content available remote Pelagic chondrichthyan microremains from the Upper Devonian of the Kale Sardar section, eastern Iran
Hairapetian V., Ginter M.
Acta Geologica Polonica
|
2010
|
Vol. 60, no. 3
357-371
EN
An assemblage of fifteen taxa of chondrichthyan microremains from late Frasnian through late Famennian pelagic deposits of the Kale Sardar section, eastern Iran, is described. Several taxa (Phoebodus bifurcatus, Phoebodus sophiae and Protacrodus vetustus) are reported for the first time from Iran. The presence of Deihim mansureae and Ph. sophiae in the Late rhenana to linguiformis Zones and Phoebodus rayi in the early triangularis Zone of the Kale Sardar section, provides new biostratigraphic information. The late Frasnian part of the assemblage corresponds to the faunas from the intrashelf basins of central europe, and the middle.late Famennian part is comparable to that from the tafilalt Platform of Morocco.
11
Content available remote Famennian chondrichthyan remains from the Chahriseh section, central Iran
Hairapetian V., Ginter M.
Acta Geologica Polonica
|
2009
|
Vol. 59, no. 2
173-200
EN
A diverse shallow water assemblage of chondrichthyan microremains is described from the Famennian of the Chahriseh section, central Iran. Twenty-two taxa are identified; of these two new taxa viz. Roongodus phijani gen. et sp. nov. (Hybodontoidea) and Arduodens flammeus gen. et sp. nov. (Ctenacanthiformes) have been erected. Two morphoecological subtypes of Ph. gothicus dentition, characteristic of deeper and shallower shelves, are proposed.
12
Content available remote New data on chondrichthyan microremains from the Givetian of the Renanue section in the Aragonian Pyrenees (Spain)
Ginter M., Liao J., Valenzuela-Rios J.
Acta Geologica Polonica
|
2008
|
Vol. 58, no. 2
165-172
EN
The continued investigations on the Middle Devonian part (Givetian, Middle through Upper Polygnathus varcus conodont Zones) of the section near the Renanue village in the Aragonian Pyrenees, Spain, brought twelve teeth of chondrichthyan taxa typical of the so-called "Omalodus shark assemblage" (Omalodus grabaui, Phoebodus fastigatus, Ph. sophiae, and probably Antarctilamna sp., the first record of Antarctilamna from the Givetian of Europe) previously known from a few places in Laurussia and North Gondwana. This taxonomic composition resembles the most that of the North Evans Limestone from New York. The species represent three different families and orders: Omalodontidae nov. (Omalodontiformes), Phoebodontidae (Phoebodontiformes), and Antarctilamnidae nov. (Antarctilamniformes nov.). In addition to the teeth of the listed taxa, several chondrichthyan scales of the "ctenacanth" type were found.
13
Content available remote Early Frasnian sharks from central Iran
Hairapetian V., Ginter M., Yazdi M.
Acta Geologica Polonica
|
2008
|
Vol. 58, no. 2
173-179
EN
Two limestone bone-beds in the early Frasnian of the Chahriseh section, central Iran, yielded numerous chondrichthyan teeth and scales. The fauna includes, most probably, only two taxa: a hitherto unknown aztecodontid omalodontiform, Manberodus fortis gen. et sp. nov., and a multicuspid phoebodontiform, provisionally referred to as Phoebodus cf. latus GINTER & IVANOV, 1995.Anew omalodontiform family, Aztecodontidae, including Aztecodus LONG& YOUNG, 1995 and Manberodus gen. nov., is proposed.
14
Content available remote Devonian filter-feeding sharks
Ginter M.
Acta Geologica Polonica
|
2008
|
Vol. 58, no. 2
147-153
EN
Upper Frasnian rocks of Utah and Nevada yielded several multicuspid, low-crowned shark teeth. It is proposed that they were used mainly for filtering food from water. Two new chondrichthyan species bearing such teeth were distinguished: a phoebodontid Diademodus utahensis sp. nov., with up to 17 very delicate cusps in the tooth-crown; and a cladodont of uncertain systematic position, Lesnilomia sandbergi gen. et sp. nov., also known from the upper Frasnian of Moravia.
15
Content available Pomiar prądów udarowych z wykorzystaniem światłowodowego czujnika polarymetrycznego
Ginter M., Kaczmarek Z.
Pomiary Automatyka Kontrola
|
2006
|
R. 52, nr 4
36-38
PL
W pracy przedstawiono układ światłowodowego czujnika polarymetrycznego, w którym wykorzystuje się efekt Faradaya. Zaprezentowano wyniki badań eksperymentalnych proponowanego czujnika oraz wyznaczono jego podstawowe własności metrologiczne. Błąd nieliniowości czujnika w zakresie 0-1 kA jest nie większy niż 1,5%. Czujnik zastosowano do pomiaru natężenia prądu udarowego powstałego podczas niskonapięciowego wyładowania elektrycznego w wodzie. Zmierzone amplitudy prądu wyładowania są zgodne z wartościami amplitud wyznaczonymi z przesłanek teoretycznych.
EN
In this paper a polarimetric fibre optic sensor, which uses the Faraday effect for the measurement of the current in conductor was described. Results of experimental research of the proposed measuring system were presented and the basic metrological properties were calculated. Nonlinearity of the sensor in range 0-1 kA is better than 1.5 %. The sensor was used to measure the intensity of the surge current arising during a low voltage electric discharge in water. The measured amplitudes of discharge current are consistent with values of amplitude calculated form theoretical premises.
16
Pomiar prądu wyładowania iskrowego
Ginter M.
Zeszyty Naukowe Politechniki Świętokrzyskiej. Elektryka
|
2005
|
Z. 43
45-50
PL
Do wytwarzania ciśnień impulsowych często wykorzystuje się elektryczne wyładowanie w wodzie. O wartości wytwarzanych ciśnień decyduje amplituda prądu w obwodzie wyładowania. Do kontroli wytwarzanych przebiegów ciśnień potrzebny jest zatem pomiar prądu wyładowania, którego amplitudy mogą osiągać kilkadziesiąt kiloamperów. Stosowanie w tym celu boczników w obwodzie prądu wyładowania jest niekorzystne z wielu względów. Proponuje się bezdotykowy pomiar prądu wyładowania z zastosowaniem czujnika polarymetrycznego wykorzystującego efekt Faradaya. W artykule przedstawiono wyniki badań eksperymentalnych proponowanego układu pomiarowego oraz wyznaczone na tej podstawie jego podstawowe własności metrologiczne. Badania przeprowadzono na stanowisku pomiarowym z generatorem ciśnień udarowych, który pozwala na wytwarzanie impulsów ciśnienia o amplitudach do 60 MPa i czasach trwania kilku mikrosekund. Wyznaczony z przesłanek teoretycznych prąd wyładowania może osiągać wartości do 30 kA. Do budowy układu pomiarowego prądu wyładowania zastosowano następujące urządzenia i układy: laser He-Ne jako źródło światła, światłowód jednomodowy utrzymujący polaryzację typu F-SPV, fotodetektory typu S6468, analogowy układ scalony AD538.
EN
Electric discharge in water is often used to generate the impulse pressure. The current amplitude has an influence on the value of the generated pressures. The measure of the discharge current, which amplitude can reach a few dozen kA for this case is needed to control the profile of generated pressures using the shunts in the discharge current circuit is disadvantageous for many reasons. Non-contacts measurement of the discharge current using the Faraday effect is proposed. In this letter results of theoretical analysis of the proposed measuring system and the basic properties calculated an this basic will be presented. The research will be carried out on the measuring position with surge pressure generator which permits generating the pressure impulse with amplitudes about 60 MPa and duration. Surge current obtained from the theoretical analysis can reach to value up to 30 kA. To construct the measuring system were used following elements: laser He-Ne, singlemode optic fiber FSM, photodetector S6468.
17
Content available remote Famennian chondrichthyans from the shelves of North Gondwana
Ginter M., Hairapetian V., Klug C.
Acta Geologica Polonica
|
2002
|
Vol. 52, nr 2
169-215
EN
Ichthyoliths, mainly shark teeth, from the Famennian of Iran and Northwest Africa are described. Evolution of shallow-water chondrichthyan assemblages on the shelves of Central Iran and the Tafilalt Platform, Morocco, related to time and environmental changes, is discussed. Four new taxa, viz. Deihim mansureae gen. et sp. nov. Protacrodus serra sp.nov., Phoebodus depressus sp. nov., and Ph. gothicus transitans subsp. nov. are erected and provisional reconstructions of heterodonty in dentitions of several Famennian sharks are proposed.
18
Content available remote Late Famennian pelagic shark assemblages
Ginter M.
Acta Geologica Polonica
|
2000
|
Vol. 50, no. 3
369-386
EN
Chondrichthyan microremains from a section at Soureille d'Izarne (Montage Noire, southern France), with a new species,Thrinacodus tranquillus sp.n., are described and compared to several other late Famennian pelagic chondrichthyan assemblages.Three general chondrichthyan biofacies are distinguished: shallow water Protacrodus biofacie; intermediate Phoebodus-Thrinacodus biofacies, characteristic of moderately deep,open shelves; and deep water Jalodus biofacies The intermediate biofacies is the most widely distributed and usually yields the richest and most diverse assemblages
19
Content available remote The Early Famennian recovery of phoebodont sharks
Ginter M., Turner S.
Acta Geologica Polonica
|
1999
|
Vol. 49, no. 2
105-117
EN
Early Famennia microvertebrates from the Cape Fortune Member, Parry Islands Formation, of the Beverley Inlet area of Melville Island, Arctic Canada, comprise the teeth and possible scales of a new phoebodontid shark, Phoebodus rayi sp.n., of a protacrodont shark, Protacrodus aequalis IVANOV, and rare teeth of other sharks. The new phoebodont from the early Famennian crepida Zone is closely related to the Lazarus taxon, Ph. typicus GINTER & IVANOV. Ph. typicus emerges in the early Famennian Late triangularis Zone following the phoebodont shark hiatus subsequent to the Kellwasser Event which apparently caused extinction of most earlier phoebodonts.
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