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Wyświetlanie 1-15 z 42
Tytuł:
A regurgitalite of the Middle Triassic (Muschelkalk) from Upper Silesia (Poland)
Autorzy:
Niedźwiedzki, Robert
Surmik, Dawid
Chećko, Agnieszka
Salamon, Mariusz A.
Powiązania:
https://bibliotekanauki.pl/articles/1841762.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
bromalites
regurgitalites
Middle Triassic
Muschelkalk
Upper Silesia
Polska
Opis:
A bromalite from the Middle Triassic (Muschelkalk) of southern Poland, Sadowa Góra Quarry, is herein described and interpreted as a regurgitalite. The fossils occurring within the regurgitalite are angular and have sharp edges. They are represented by common fragments of thin-shelled bivalves as well as rare crinoid and gastropod remains. The composition of the collected inclusion is different from that of the host rock. There are many candidates that could have produced the regurgitalite, including durophagous sharks, marine reptiles, the actinopterygian Colobodus, or nautiloids. Our finding adds to the emerging evidence of durophagous predation in the Triassic sea of Polish part of the Germanic Basin. It is the second record of a regurgitalite from the Muschelkalk of Upper Silesia.
Źródło:
Geology, Geophysics and Environment; 2021, 47, 1; 33-40
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active forms of tourism among lower and higher secondary students in Cracow
Autorzy:
Jurczak, A.
Żiżka-Salamon, D.
Powiązania:
https://bibliotekanauki.pl/articles/128384.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
active forms of tourism
young people
Opis:
The purpose of this paper is to determine organizational forms (formal, non-formal) and the level of tourism activity among young people of secondary schools in Cracow depending on gender, the type of school and the education of the parents. The study included 1472 students of schools in Cracow. Physically active forms of tourism are undertaken mostly by girls - 63% rather than by boys - 52%. With increasing levels of education of the parents, the number of young people practicing active forms of tourism also increases. The undertaking of active forms of tourism varies, depending of the type of school attended. Young people in secondary (63,9%) and primary (65,7%) schools most often chose to go for tourism. In primary (50,1%) and secondary (39,4%) vocational schools they go least often. Active forms of tourism usually take the form of informal practice among friends and acquaintances (mostly hiking - 47%).
Źródło:
Geotourism / Geoturystyka; 2014, 1; 15-20
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An explanation for low endemism of Triassic crinoids fromthe epicontinental Germanic Basin, Poland
Autorzy:
Salamon, M. A.
Niedźwiedzki, R.
Powiązania:
https://bibliotekanauki.pl/articles/2058915.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Germanic Basin
Polska
Triassic
muschelkalk
crinoids
biogeography
Opis:
A summary of known crinoid taxa in the Polish part of the Triassic Germanic Basin, including their presence elsewhere, is documented. At present, 13 taxa and 3 ecophenotypes of crinoids have been recorded from that area, only one of them being endemic. In the Lower Muschelkalk and lower part of theMiddleMuschelkalk, taxa widespread both in the Tethys and Germanic Basin, or Tethyan taxa, dominate. In the Upper Muschelkalk crinoids are very rare in Poland, being represented by Encrinus liliiformis and Holocrinus sp. Many of the species occurring in the central part of the Germanic Basin in the Upper Muschelkalk have not been recorded in the eastern part of the basin. The degree of endemism of the crinoid fauna in theMuschelkalk is markedly lower than the degree of endemism of the rest of the benthonic macrofauna. This probably resulted from huge number of crinoids forming "crinoid gardens" that produced large number of larvae, increasing the chances of successful geographical expansion of crinoids.
Źródło:
Geological Quarterly; 2005, 49, 3; 331--338
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of distance measurement errors in CW FM sonar with MLS code modulation
Autorzy:
Jedel, A.
Marszal, J.
Salamon, R.
Powiązania:
https://bibliotekanauki.pl/articles/331626.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
CW FM sonar
pseudorandom sequence
Doppler effect
sonar parameters
Opis:
Although used in the classic silent sonar, the CW FM sounding signal has a major flaw which is its inaccuracy in determining the distance to a target. The authors of the article have developed a concept of silent sonar using frequency modulation signals switched by pseudorandom codes, already discussed in their previous work. This article presents a detailed analysis of errors in CW FM sonar with pseudo-random sequence code modulation confronted with errors which occur in similar sonar without code modulation.
Źródło:
Hydroacoustics; 2017, 20; 75-84
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bearing errors in passive sonar stationary target location
Autorzy:
Schmidt, A.
Marszal, J.
Salamon, R.
Jedel, A.
Ostrowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/332830.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
bearing errors
passive sonar
hydroacoustics
Opis:
The paper presents a method for determining the coordinates of stationary targets using passive sonar bearing. It identifies the requirements sonar movements must meet to keep the incorrect determination of coordinates to a minimum. It gives the relations, which help determine coordinate errors analytically. Numerical experiments are used to demonstrate the success of the analysis.
Źródło:
Hydroacoustics; 2009, 12; 189-200
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comment on "Palaeoenvironmental control on distribution of crinoids in the Bathonian (Middle Jurassic) of England and France" by Aaron W. Hunter and Charlie J. Underwood
Autorzy:
Salamon, M.A.
Gorzelak, P.
Zaton, M.
Powiązania:
https://bibliotekanauki.pl/articles/23363.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
discussion
paleoenvironment control
distribution
crinoid
Bathonian
Middle Jurassic
England
France
Źródło:
Acta Palaeontologica Polonica; 2010, 55, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Continuous wave sonar with hyperbolic frequency modulation keyed by pseudo-random sequence
Autorzy:
Jedel, A.
Marszal, J.
Salamon, R.
Powiązania:
https://bibliotekanauki.pl/articles/331999.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
CW FM
pseudorandom sequence
Doppler effect
matched filtering
Opis:
A CW FM type sounding signal is used in the classical solution of silent sonar. While the signal provides a relatively simple implementation of digital signal processing, and ensures good detection conditions, unfortunately, in the presence of the Doppler effect, distance measurement results tend to be wrong. This is due to the fact that the received signal’s instantaneous frequency value is dependent both on the distance to the object, and its speed. Sounding signal, as patented by the authors, is a combination of Pseudo-Random Sequences (PRS), and elementary signals of Hyperbolic Frequency Modulation (HFM) type. The structure of this signal is aimed at minimizing measurement error. The article presents the idea of a sounding signal of HFM+PRS type, and the results of computer simulations.
Źródło:
Hydroacoustics; 2016, 19; 185-196
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crinoids (Crinoidea, Echinodermata) from the Middle Jurassic (Callovian) of eastern Poland : a case study from the Żebrak IG 1 borehole
Autorzy:
Salamon, M. A.
Feldman-Olszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/973711.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Echinoderms
crinoids
Jurassic
Callovian
Polska
Opis:
A taxonomic account of the Callovian crinoid fauna from the Żebrak IG 1 borehole (eastern Poland) is presented. The assemblage contains numerous isocrinid ossicles (Isocrinidae) assigned to the following taxa: Isocrinus cf. nicoleti (Desor), Isocrinus sp., Chariocrinus andreae (Desor), Balanocrinus cf. subteres (Münster in Goldfuss) and Pentacrinites sp. These isocrinids are associated with a few ossicles of cyrtocrinids (Cyrtocrinida; Cyrtocrinida indet.). The crinoid remains are poorly preserved; they all are isolated ossicles, showing broken margins and/or abraded surfaces. Such a state of preservation documents a long distance of transportation and/or re-deposition in a high-energy, shallow-water setting. The crinoid assemblage differs significantly from those of southern Poland (the Polish Jura Chain and the Mesozoic margin of the Holy Cross Mountains), in which sessile crinoids, such as cyrtocrinids (Cyrtocrinida), inhabiting mostly deeper-water carbonate facies, are predominant.
Źródło:
Annales Societatis Geologorum Poloniae; 2018, 88, 3; 273-283
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crinoids from Svalbard in the aftermath of the end−Permian mass extinction
Autorzy:
Salamon, Mariusz A.
Hanken, Nils−Martin
Gorzelak, Przemysław
Riise, Henrik Erevik
Ferré, Bruno
Powiązania:
https://bibliotekanauki.pl/articles/2049569.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
echinoderms
crinoids
P/T extinction
recovery
Źródło:
Polish Polar Research; 2015, 3; 225-238
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of a fore-mountain alluvial fan of the Olza River (southern Poland) during the Pleistocene
Autorzy:
Salamon, T.
Wójcik, A.
Powiązania:
https://bibliotekanauki.pl/articles/191976.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
fore-mountain alluvial fan
sedimentology
Pleistocene
Kończyce section
southern Poland
Opis:
A series of Pleistocene deposits with different lithology is present where the Olza River flows out from the Carpathian foothills to the Oświęcim Basin. The deposits are mostly composed of gravels forming several series of different ages, which are intercalated with much finer silts and sands as well as organic silts. A complex of glaciogenic deposits is also found as a thin layer of till, glaciolacustrine and glaciofluvial sediments. Loess-like deposits occur in the top part of the section under study. Gravels were deposited in the zone of a fore-mountain fan. The co-occurrence of lithologically different deposits reflects a great variability of sedimentation conditions, which depended mostly on climate changes. However, the formation of fan was also controlled by other factors. Neotectonic movements probably played an important role in its evolution. In this paper, we describe the successive stages of fan development and the factors determining this process. The interpretation is based on the analysis of deposits exposed in the eastern part of the fan, at the Kończyce site. The fan of the Olza River was built up with alluvia mostly during successive glaciations. It was dissected towards the end of each glaciation. During interglacials the fan was only slightly transformed. A special period of fan development occurred during glaciation when the ice sheet advanced on the fan surface. The aggradation of the fan was probably stopped due to uplift of the area. Then, aeolian loess-like deposits started to accumulate on a considerable part of the fan surface. Former opinions about the stratigraphy of the fan deposits are strongly diversified. Precise age of the successive series is still difficult to establish. In the light of contemporary studies, it can not be excluded that age of the Olza fan might be younger than previously suggested .
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 1; 39-52
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Doppler effect in the cw fm sonar
Autorzy:
Marszal, J.
Salamon, R.
Zachariasz, K.
Schmidt, A.
Powiązania:
https://bibliotekanauki.pl/articles/331758.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
When sonars are used for military purposes they have to ensure unobtrusive operation, afeature that can be potentially secured by ‘silent sonars’ or continuous wave frequency modulation sonars (CW FM sonars). The article presents how these sonars operate and identifies the relations between their parameters. The Doppler effect and its impact on the CW FM sonar are studied to identify how it affects the sonar’s parameters. The results of simplified theoretical calculations are supported with results of computer simulations of a more realistic model.
Źródło:
Hydroacoustics; 2011, 14; 157-164
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic control of the receiving beam horizontal cross-section in the side scan sonar
Autorzy:
Jedel, A.
Kilian, L.
Marszal, J.
Ostrowski, Z.
Salamon, R.
Powiązania:
https://bibliotekanauki.pl/articles/332725.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
A decade old side scan sonars are now being modernised by way of dynamically controlling the width of the receiving beam in the horizontal cross-section. The result is a quasi-constant linear resolution of the sonar (replacing constant angular resolution), when it picks up echo signals as it moves further away from the targets. The advantage of the treatment is that the ship using the side scan sonar can increase its speed without risking the loss of near targets’ echo. The articles describes how the system of dynamic control was implemented. Special TVG systems were introduced to control dynamic signal gain from several separate sections of the sonar’s acoustic array, which was divided symmetrically into unequal sections. The location of these systems in the sonar’s receiver is presented. Examples are given of curves that control TVG and of the effects of dynamic horizontal stabilisation of the sonar’s linear resolution as it receives signals.
Źródło:
Hydroacoustics; 2005, 8; 69-76
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eksploracja głębin Morza Karaibskiego w rejonie wyspy Roatán (Honduras) przez polskich paleontologów - teraźniejszość kluczem do poznania przeszłości
Deep-sea exploration of the Caribbean Sea in the area of Roatán Island (Honduras) from the point of view of Polish palaeontologists - the present is the key to the past.
Autorzy:
Gorzelak, Przemysław
Salamon, Mariusz A.
Powiązania:
https://bibliotekanauki.pl/articles/20222731.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Honduras
szkarłupnie
liliowce
strefa foticzna
ichnologia
echinoderms
crinoids
photic zone
ichnology
Opis:
The island margin of Isla de Roatán is a unique place of outstanding scientific and didactic values, with one of the longestcoral reef and an astonishing fauna inhabiting the deep sea zones. The unique geomorphological conditions enable to perform shore-based submersible operations at great depths. In this paper a short report from our dive down to about 650 m is presented. Our preliminary dive was used to document a diverse faunal assemblage, which allowed for a better understanding of the fossil record.
Źródło:
Przegląd Geologiczny; 2023, 71, 2; 71-81
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Encrinus cf. liliiformis Lamarck, 1801, the youngest crinoid from the Polish Muschelkalk (Middle Triassic)
Encrinus cf. liliiformis Lamarck, 1801, najmłodszy liliowiec z polskiego wapienia muszlowego (środkowy trias) : komunikat
Autorzy:
Salamon, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/183743.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Góry Świętokrzyskie
Śląsk
trias
wapień muszlowy
zbiornik germański
Encrinus cf. liliiformis
Holy Cross Mountains
Silesia
Triassic
muschelkalk
Germanic Basin
Opis:
The paper reports first undoubted occurrence of crinoid species Encrinus cf. liliiformis from the Upper Muschelkalk (Middle Triassic) of Poland. Contrary to previous records, it has been found the species occurs only in Upper Muschelkalk sediments. On the basis of known evidence, it seems that E. cf. liliiformis migrated east to west through the reactivated East-Carpathian Gate
Po raz pierwszy udokumentowano pewną obecność liliowca Encrinus cf. liliiformis w osadach górnego wapienia muszlowego (środkowy trias) Polski. W przeciwieństwie do poprzednich doniesień wykazano, że gatunek ten występuje jedynie w górnym wapieniu muszlowym. Szereg przesłanek świadczy o migracji E. cf. liliiformis ze wschodu na zachód przez reaktywowaną bramę wschodnio-karpacką
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2005, 31, 2; 243-252
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gniazdowe akumulacje szczątków fauny w środkowojurajskich iłach rudonośnych Wyżyny Krakowsko-Częstochowskiej-wnioski paleobiologiczne
Nest-like accumulations of faunal remains in the Middle Jurassic ore-bearing clays of the Kraków-Czestochowa Upland and their palaeobiological implications
Autorzy:
Zatoń, M.
Salamon, M. A.
Marynowski, L.
Zatoń, R.
Powiązania:
https://bibliotekanauki.pl/articles/2074537.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
średnia Jura
Polska
fragmenty skorup
szczątki organiczne
Middle Jurassic
Polska
predation
shell fragments
shelly fossils
Opis:
Distinct faunal accumulations in the uppermost Bajocian/lowermost Bathonian, lowermost and Middle Bathonian of the Polish Jura (south-central Poland) have been detected. The fossils are densely packed in the centre of the accumulations and more or less dispersed in their margins. The accumulations vary in size, but all are rich in various groups of organisms, of which the molluscs (mainly bivalves) and echinoderms predominate. The echinoderms are all disarticulated, and shelly fauna occur as angular fragments with sharp edges, of random sizes and without any signs of abrasion. The different sizes of the fossil remains, from tiny echinoderm ossicles or juvenile shelly fauna to medium-sized shell fragments or belemnite rostra, exclude any transportation and thus sorting. Worth of noting is the occurrence of similar faunal groups in each accumulation. The general shape and composition of the accumulations, as well as their taphonomical features, especially the angularity of shell fragments, point to durophagous (shell-crushing) predation rather than physical processes. The various organisms may indicate that the potential predator (most probably fish) fed on various invertebrates. The indigestible particles were later regurgitated forming the accumulations discussed. The presence of various epibionts on the fossil fragments indicate,that they rested upon the sea-floor for some time-span after they had been regurgitated. Then the scavengers, as well as current action or water movements, have been responsible for dispersion of some of the fossils, as is well-visible at the margins of the investigated accumulations..
Źródło:
Przegląd Geologiczny; 2007, 55, 5; 424-429
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 42

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