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Tytuł:
Hypotheses and dilemmas around the origin and uniqueness of life
Autorzy:
Legocki, Andrzej B.
Powiązania:
https://bibliotekanauki.pl/articles/1916654.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
origin of replication
chemical evolution
Opis:
The emergence of life on Earth and its almost infinite diversity, reflected by a myriad of living organisms, are among the dilemmas that have forever fascinated scientists and philosophers. Today, we are still not able to determine what exactly initiated the chain of events leading to the rise of life – the mechanism of replication of initial structures or perhaps the occurrence of first metabolic reactions. Further approximations of these issues shall probably constitute an overwhelming driving force for future development of life sciences.
Źródło:
Nauka; 2020, 3
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The origins of the Polish state in new light
Autorzy:
Jasiński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/703624.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
origin of the Polish state
dendrochronology
Opis:
Dendrochronological analyses undertaken in the 1990s allowed for the establishment of a new time-line in determining a more precise date for the origins of the Polish state. It appeared from these data that the creation of the Polish state occurred much later than it had been thought before. The formation of the early medieval state was initiated by vast and multi-faceted cultural changes occurring on the territory of the Gniezno plateau at the turn of the 9th and the 10th century. As the culminating point of that process, one can consider the consolidation of the local population in reaction to the threat posed by the outbreak of the great uprising of the Slavs along the Elbe River in 936-940.
Źródło:
Nauka; 2007, 4
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Haplotypes of microsatellite markers of the CFTR gene in Polish and German CF chromosomes suggest an ancient origin of the most frequent cystic fibrosis mutations
Autorzy:
Witt, M
Varon-Mateeva, R
Reis, A
Rutkiewicz, E
Powiązania:
https://bibliotekanauki.pl/articles/2046681.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microsatellite marker
chromosome
haplotype
German population
Polish population
autoradiography
Paleolithic origin
mutation
cystic fibrosis
Neolithic origin
Opis:
In this study we have analysed haplotypes of microsatellite markers of the CFTR gene: IVS8CA, IVS17BTA, IVS17BCA in 17 CF chromosomes of Polish origin and in 19 chromosomes of German origin bearing CF mutations other than ΔF508. In the Polish population, the G542X mutation is connected with haplotypes 16/17-28/32/38-13; in the German population, a more diverse haplotype association has been detected (23-33-13 and 16-32-13). The 1717-1G->A mutation is associated with the 15/16-7-13 haplotype in the Polish population, like the G551D mutation in Germany. The only analysed case of N1303K of Polish origin is connected with the 23-30-13 haplotype, like in the German population. One N1303K chromosome of an entirely different haplotype (16-29-17) turned out to be of Greek origin. These data suggest an ancient, Palaeolithic or Neolithic origin of these mutations in the territory of current Northern Europe.
Źródło:
Journal of Applied Genetics; 1997, 38, 3; 329-334
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Closed-loop control algorithm for some class of nonholonomic systems using polar representation
Autorzy:
Pazderski, D.
Szulczyński, P.
Kozłowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/201607.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
polar coordinates
nonholonomic system
discontinuous stabilization at the origin
Opis:
This paper is focused on the convergence problem defined for some class of a two input affine nonholonomic driftless system with three-dimensional state. The problem is solved based on a polar transformation which is singular at the origin. The convergence is ensured using static-state feedback. The necessary conditions for construction of the algorithm are formally discussed. The solution, in general, is local, and the feasible domain is strictly related to the properties of the control system. In order to improve algorithm robustness a simple hybrid algorithm is formulated. The general theory is illustrated by two particular systems and the results of numerical simulations are provided.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 521-535
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phylogeographic Estimates of Colonization of The Deep Atlantic by The Protobranch Bivalve Nucula Atacellana
Autorzy:
Jennings, Robert M.
Etter, Ron J.
Powiązania:
https://bibliotekanauki.pl/articles/2051166.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Icelandic waters
Protobranchia
population genetics
species origin
North Atlantic demographics
Źródło:
Polish Polar Research; 2014, 2; 261-278
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the genus Bothrophyllum Trautschold, 1879 (Anthozoa, Rugosa)
Autorzy:
Fedorowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/139300.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Carboniferous Bothrophyllum
morphological frames
origin
distribution
relationships
geneza
dystrybucja
związek
Opis:
The rugose coral genus Bothrophyllum Trautschold, 1879 is revised on the basis of data from the literature and the author’s personal investigation of both topotypes of its type species B. conicum and related and/or similar taxa from other areas. The intraspecific variability of the type species, its neotype, the intra-generic framework and a new generic diagnosis are established. Many more than 100 taxa related and/or similar to Bothrophyllum were analyzed and the most important of them are discussed. Detailed analysis of the type species based on the neotype and supported by additional topotype specimens illustrated here, allows restriction of both the type species and the genus, and leads to the proposition that Bothrophyllum-like taxa with a shortened cardinal septum should be considered of subgeneric (not named) status. Detailed analysis of the specimens and species described and illustrated from the type site (Myachkovo Quarry, Moscow Basin) form the basis for further considerations. On the basis of that analysis and characters established for the type species, taxa from all other European, African, Asiatic and North American areas either named Bothrophyllum or bearing characters of that genus were analyzed. The supposed origin and discussion of the relationships conclude the paper. A list of synonyms and exclusions from Bothrophyllum and lists of species included, excluded, or possibly belonging to Bothrophyllum and Bothrophyllum-like corals with a shortened cardinal septum are presented.
Źródło:
Acta Geologica Polonica; 2016, 66, 1; 1-41
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
KIM JESTEŚMY I CO PRZEŻYLIŚMY? MIGRANCI NIEPEŁNI WOBEC SPOŁECZNOŚCI POCHODZENIA
WHO ARE WE AND WHAT HAVE WE EXPERIENCED? THE INCOMPLETE MIGRANTS AND THEIR COMMUNITY OF ORIGIN
Autorzy:
Niedźwiedzki, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/579690.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PENDULUM MIGRATION
IDENTITY
RE-ADAPTATION OF MIGRANTS TO THE GROUP OF ORIGIN
Opis:
The reconstruction of the migrants’ identity is an essential condition for the migrants’ adaptation in their new place of settlement. Such reconstruction in the case of incomplete, pendulum migration is more complicated. This type of migration is characterized by its relatively short term nature and multiple travels of migrants between their country of origin and the target country. The identity of the so-called pendulum migrants is composed of cultural elements belonging both to the receiving society and to the native one. As a result migrants confront components of their identity constructed during interactions in the host society with their group of origin whenever they come back to their home country. It is a special process of re-adaptation to their original society. One can distinguish different types of narrations used by pendulum migrants. Those diverse techniques of communication differ in their cognitive and emotional components. The narrations fulfill many functions. For instance, they sustain social relations and social ties, satisfy the need for social prestige and recognition, and facilitate the acceptance of the negative experiences of migration. The different types of narrations are applied contextually and situationally depending on the motive, goal and the partner of the interaction. The paper contains a detailed analysis of the features of the above-mentioned narrations and the circumstances of their formation and use.
Źródło:
Studia Migracyjne - Przegląd Polonijny; 2011, 37, 2(140); 115-129
2081-4488
2544-4972
Pojawia się w:
Studia Migracyjne - Przegląd Polonijny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Originary experience of art in Martin Heidegger’s philosophy
Źródłowe doświadczenie sztuki w filozofii Martina Heideggera
Autorzy:
Krawiec, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2096333.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aletheia
phenomenology
M. Heidegger
essence
eyeblink
art
dread
origin (Ursprung)
fenomenologia
istota
okamgnienie
sztuka
trwoga
źródło (Ursprung)
Opis:
Martin Heidegger in The Origin of the Work of Art (Der Ursprung des Kunstwerkes) developed a whole new way of thinking about art, going beyond traditionally understood aesthetics or even philosophy of art. Some of Heidegger’s thoughts, however, appear to be understated and only signal a huge complexity of both experiencing works of art and the very issue of the origin of the work of art. The analysis of the terms ‘dread’ and ‘eyeblink’ from Time and Being presented in this article complement and develop Heidegger’s ideas included in his essay. Linking art to these two crucial phenomena of fundamental ontological analysis of Dasein casts light on the status of art and its existential significance. The author aims mainly at demonstrating the aletheic connection (based on unclosedness) between the experience of ‘originary source’ of a piece of art and ‘dread’, and also, in conclusion, he points to the ‘event of Being’ as the essential, non-metaphysical origin of art.
Źródło:
Przegląd Filozoficzny. Nowa Seria; 2019, 1; 93-113
1230-1493
Pojawia się w:
Przegląd Filozoficzny. Nowa Seria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Middle/Upper Devonian brachiopod shell concentrations from the intra-shelf basinal carbonates of the Holy Cross Mountains (central Poland)
Autorzy:
Skompski, S.
Baliński, A.
Szulczewski, M.
Zawadzka, I.
Powiązania:
https://bibliotekanauki.pl/articles/139310.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Devonian
brachiopods
Holy Cross Mountains
allochthonous origin of coquina
dewon
ramienionogi
Góry Świętokrzyskie
skała osadowa
pochodzenie allochtoniczne
Opis:
A huge isolated accumulation, more than 3 m thick and 10 m wide, of densely packed, uncrushed brachiopods has been found in Józefka Quarry within the Middle/Upper Devonian Szydłówek Beds deposited in a relatively deep environment of an intrashelf basin (Kostomłoty facies zone, western Holy Cross Mountains, Poland). The low-diversity assemblage is strongly dominated by the atrypide Desquamatia globosa jozefkae Baliński subsp. nov. and, to a lesser degree, by the rhynchonellide Coeloterorhynchus dillanus (Schmidt, 1941), which constitute 72.8% and 22.1% of the fauna, respectively. Less frequent are specimens representing the genera Hypothyridina, Schizophoria and Phlogoiderynchus. According to the conodont fauna found within the coquina bed, the stratigraphic position of the shell accumulation is close to the Givetian/ Frasnian boundary. The brachiopods are associated with numerous crinoids and less frequent bryozoans, receptaculitids (Palaeozoic problematica), sponges and solitary corals. Although it is difficult to entirely exclude the autochthonous nature of the brachiopod coquina member, its allochthonous origin and redeposition of the brachiopod shells to the deep basin by gravity flows is much more probable. Such conclusion is supported by the following facts: (1) the position of the complex in a succession of deep-marine basinal facies impoverished in oxygen; (2) its lateral thinning-out and composite internal stratification; (3) the lensshaped geometry of the coquina bed in the section perpendicular to the bedding dip; (4) high variability of the sediments preserved within the shells; and (5) the preferred orientation of the shells. The brachiopods mixed with crinoidal debris were probably transported by low-velocity, high-density, gravity-induced debris flows. Lack of fossils typical of the Middle Devonian shallows, such as massive stromatoporoids, amphiporoids and tabulates, indicates that the source area of the bioclastic material was not located in the shallowest part of the shelf, but most probably on a submarine sea-mount to the north of present-day Józefka, as suggested by earlier investigators. The triggering mechanism of the allochthonous deposition was an earthquake rather than storm activity. The enormous thickness of the brachiopod complex is probably caused by the sinking of bioclastic material, transported in succeeding depositional multi-events, in a soft, muddy bottom, typical of the Szydłówek Beds deposition.
Źródło:
Acta Geologica Polonica; 2018, 68, 4; 607-633
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kulturogeneza jako twórczy rdzeń kultury : wkład Eduarda Markariana w kształtowaniu się koncepcji kulturogenezy
PROCESSES OF CULTURE-GENESIS AS A FORMATIVE CORE OF CULTURE CONTRIBUTION OF EDUARD MARKARIAN IN THE DEVELOPMENT OF THE THEORY OF CULTURE-GENESIS
Autorzy:
Baradai, Katarzyna
Bondariew, Aleksiej
Powiązania:
https://bibliotekanauki.pl/articles/781590.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Eduard Markarian;
Russian anthropology of culture
culture
origin of cultur
Eduard Markarian
rosyjska antropologia kultury
kultura
kulturogeneza
Opis:
The author presents the output of Eduard Makarian, a Russian cultural anthropologist, featuring his contribution to the problem of origin of culture. The development of Makarian’s scientific research has been presented from the understanding of systemic character of culture to the research on the origin of culture; from reflecting upon the first principles of culture development to the concept of system evolution as anthropogenesis, social evolution and cultural evolution, to the understanding of the origin of culture as a creative core of culture (cultural heritage, dynamics of cultural traditions, “tradition”–“change” dichotomy, hypothesis of “cultural genes”, etc.). The scientist moved from the issue of the origin of culture in the prehistoric times through the issues of permanent creation and dialectic self-revival of culture to the problems of culture in contemporary world. His research was of key importance for the establishment of philosophical and cultural approach in the research of the origin of culture in Russia.
Źródło:
Kultura i Społeczeństwo; 2011, 55, 2-3; 147-170
2300-195X
Pojawia się w:
Kultura i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
,Danzig sehen und sterben‘. Manifestation der regionalen Verbundenheit in Danziger Todesanzeigen
Autorzy:
Janus, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/2083256.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
obituary
Little Homeland
Danzig/ Gdańsk
regional origin
flight and expulsion
nekrolog
mała ojczyzna
przynależność regionalna
ucieczka i wypędzenie
Opis:
In the magazine Unser Danzig published by ex-citizens of Gdańsk in the years of 1949–2008, one must pay attention not only to politically-engaged texts, but also to obituaries which present lives of the deceased and missing their lost fatherland. The aim of these obituaries is not only to inform about someone’s death, but also to acccept the regional origin of the deceased, which is presented by linguistic and paralinguistic means.
W wydawanym w latach 1949–2008 przez byłych Gdańszczan czasopiśmie Unser Danzig uwagę zwracają nie tylko teksty zaangażowane politycznie, ale również nekrologi dokumentujące drogi życiowe zmarłych i ich tęsknotę za utraconą małą ojczyzną. Ich funkcja polega nie tylko na zakomunikowaniu faktu czyjejś śmierci, ale również na zaakcentowaniu przynależności regionalnej zmarłego, co jest realizowane zarówno przy użyciu środków językowych, jak i pozajęzykowych.
Źródło:
Kwartalnik Neofilologiczny; 2018, 4; 580-591
0023-5911
Pojawia się w:
Kwartalnik Neofilologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spherules associated with the Cretaceous–Paleogene boundary in Poland
Autorzy:
Brachaniec, T.
Karwowski, Ł.
Szopa, K.
Powiązania:
https://bibliotekanauki.pl/articles/139277.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Cretaceous-Paleogene boundary
Polska
Spherule
microkrystites
impact origin
Ni-rich spinels
smectite
kreda
paleogen
granica
Polska
geneza uderzeniowa
smektyty
Opis:
The succession of the Lechówka section near Chełm in south-eastern Poland presents the first complete record of the Cretaceous–Paleogene (K–Pg) boundary in Poland. Samples of the boundary clay were examined for microtektites and shocked minerals to confirm the impact origin of the sediment. The spheroidal fraction reveals morphological and mineralogical features, e.g., spherules, similar to material from the K–Pg boundary as described from elsewhere. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The spinels are considered to be primary microlites and, thus, the spherules at Lechówka can be classified as microkrystites. No shocked minerals were noted. The deposits with spherules comprise Aland Mg-rich smectite (Cheto smectite). This almost pure Mg-rich smectite, forming up to 100% of the clay fraction, derived from the weathering of the impact glass. It is proposed that the spherules isolated from the Cretaceous-Paleogene boundary clay at Lechówka come from the Chicxulub crater in Mexico.
Źródło:
Acta Geologica Polonica; 2014, 64, 1; 99-108
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new method of decision making in multi-objective optimal placement and sizing of distributed generators in the smart grid
Autorzy:
Khoshayand, Hossein Ali
Wattanapongsakorn, Naruemon
Mahdavian, Mehdi
Ganji, Ehsan
Powiązania:
https://bibliotekanauki.pl/articles/2202555.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
backward-forward load distribution
fuzzy logic
iterative search algorithm
multi-objective optimization
shortest distance from the origin
weighted sum
Opis:
One of the most important aims of the sizing and allocation of distributed generators (DGs) in power systems is to achieve the highest feasible efficiency and performance by using the least number of DGs. Considering the use of two DGs in comparison to a single DG significantly increases the degree of freedom in designing the power system. In this paper, the optimal placement and sizing of two DGs in the standard IEEE 33-bus network have been investigated with three objective functions which are the reduction of network losses, the improvement of voltage profiles, and cost reduction. In this way, by using the backward-forward load distribution, the load distribution is performed on the 33-bus network with the power summation method to obtain the total system losses and the average bus voltage. Then, using the iterative search algorithm and considering problem constraints, placement and sizing are done for two DGs to obtain all the possible answers and next, among these answers three answers are extracted as the best answers through three methods of fuzzy logic, the weighted sum, and the shortest distance from the origin. Also, using the multi-objective non-dominated sorting genetic algorithm II (NSGA-II) and setting the algorithm parameters, thirty-six Pareto fronts are obtained and from each Pareto front, with the help of three methods of fuzzy logic, weighted sum, and the shortest distance from the origin, three answers are extracted as the best answers. Finally, the answer which shows the least difference among the responses of the iterative search algorithm is selected as the best answer. The simulation results verify the performance and efficiency of the proposed method.
Źródło:
Archives of Electrical Engineering; 2023, 72, 1; 253--271
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ pochodzenia społecznego i czynników merytokratycznych na kapitał społeczny
Effect of Social Origin and Rule of Meritocracy on the Social Capital
Autorzy:
Domański, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/427675.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
status rodziców
zdolności jednostek
uzyskiwanie pomocy
sieci znajomych
social origin
social stratification
cognitive abilities
friendship network
quality of school
Opis:
Celem tej analizy jest ustalenie, w jakim stopniu kapitał społeczny związany jest z kształtowaniem się stratyfikacji klasowej. Można to stwierdzić analizując wpływ pochodzenia społecznego, wykształcenia i zdolności jednostek na kapitał społeczny definiowany jako możliwości uzyskiwania pomocy od znajomych i krewnych. Empiryczną podstawą odpowiedzi na to pytanie są dane z badań ogólnopolskich przeprowadzonych w 2014 roku na zbiorowości osób w wieku 21−22 lat. Zgodnie z hipotezami, czynniki te niezależnie od siebie różnicują kapitał społeczny, chociaż oddziaływanie zdolności jest małe. Zależność od pochodzenia społecznego można interpretować jako świadectwo znaczącej roli kapitału społecznego w odtwarzaniu się podziałów klasowych, podczas gdy związek z poziomem wykształcenia sygnalizuje oddziaływanie cech nabywanych, odnoszących się do otwartości struktury społecznej.
This paper extends the debate on relationships between social capital and social stratification. Drawing on the longitudinal study based on pupils born in 1992-1993 I investigate the effect of social origin, education and cognitive skills on social capital defined in terms of help expected from friends. I detail the characteristics of these networks across different classes and then explore the ways these networks are affected by family background confronted by educational achievements and abilities related to meritocracy. Evidence suggests that all these variables affect social capital although abilities exert relatively small impact on getting help. According to expectations pupils originating from the upper-middle class families can receive more help than lower class categories that may display an important role of social capital in reproduction of the class structure. At the same time, the net effect of educational level affirms the importance of achievements that maintain openness and counter-vail intergenerational transmission.
Źródło:
Studia Socjologiczne; 2017, 4(227); 147-163
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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