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Wyświetlanie 1-15 z 56
Tytuł:
Some remarks on dynamic results for averaged and exact models of thin periodic plates
Porównanie wyników analizy dynamicznej według uśrednionych i dokładnych modeli cienkich płyt periodycznych
Autorzy:
Jędrysiak, J.
Michalak, B.
Powiązania:
https://bibliotekanauki.pl/articles/281259.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
periodic plate
effect of periods lengths
travelling wave
Opis:
The aim of the paper is to show certain justification of the new non-asymptotic model of thin periodic plates, derived using the tolerance averaging (Wo?niak and Wierzbicki, 2000). The model describes the effect of periodicity cell size on overall plate behaviour, on the contrary to known homogenised models. Results obtained from those models will be compared to solution to and from the "exact" discrete model. It is shown that for long-wave propagation problems, results obtained for a special case of a periodic plate strip (weightless but covered by a periodically distributed system of two concentrated masses) within the non-asymptotic model are close results calculated from the known "exact" solutions based on the method used to analyse longitudinal vibrations of one-dimensional diatomic lattice (Brillouin, 1953). Similar conformity, taking place in special cases of short waves, is also presented.
Celem pracy jest dokonanie pewnej weryfikacji nowego nieasymptotycznego modelu cienkich płyt periodycznych, wyprowadzonego przy zastosowaniu tolerancyjnego uśredniania (Woźniak i Wierzbicki, 2000). W przeciwieństwie do znanych modeli zhomogenizowanych, model ten opisuje wpływ wymiaru komórki periodyczności na ogólną pracę płyty. Wyniki uzyskane w ramach tych modeli będą porównane z rozwiązaniem według "dokładnego" modelu dyskretnego. Można pokazać, że w zagadnieniach propagacji fal długich wyniki otrzymane w ramach modelu nieasymptotycznego dla szczególnego przypadku periodycznego pasma płytowego (nieważkiego lecz z periodycznie rozłożonym układem dwóch mas skupionych) są bliskie wynikom uzyskanym ze znanych rozwiązań "dokładnych", które wykorzystują metodę stosowaną do analizy drgań podłużnych jednowymiarowej dwuatomowej siatki (Brillouin, 1953). Pokazano także podobną zgodność wyników w szczególnych przypadkach propagacji fal krótkich.
Źródło:
Journal of Theoretical and Applied Mechanics; 2005, 43, 2; 405-425
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of vegetative and generative characteristics of different cotton varieties under drought stress
Autorzy:
Demirel, E.
Ödemiş, B.
Powiązania:
https://bibliotekanauki.pl/articles/101412.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
cotton
irrigation level
drought
drought tolerance
growth periods
Opis:
The research was carried out to determine the effect of different irrigation water requirements of different irrigation levels (mm), on the evapotranspiration seed yield (kg da-1) with vegetative and generative properties of two cotton types (drought tolerant, BA 525) and (drought susceptible, Lydia), in the Eastern Mediterranean region (Turkey). Drought or water deficit stress elicits many different phenological responses in plants. The study of vegetative features included the fresh and dry weight of plant (g), leaf area (cm2 ), number of leaves (number plant-1), number of fruit branches (number plant-1), number of bud formation (number plant-1) and number of node (number plant-1).This result indicates that water stress in plants limit the phenological development significantly and the average of all measurements made after flowering has been observed to decrease.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2016, IV/1; 1169-1177
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of maturation stage and after-ripening on seed quality in organically- and conventionally-produced pepper (Capsicum annuum L.) seeds
Autorzy:
YILDIRIM, Kutay
DEMIR, Ibrahim
Powiązania:
https://bibliotekanauki.pl/articles/2199943.pdf
Data publikacji:
2020-12-07
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
after ripening
germination
harvesting periods
organic seed
pepper
Opis:
High quality seed production is essential in organic production as well as in conventional production. Fruit maturity can be observed at different times due to the continuous flowering of pepper plant. Consequently, seeds with different maturity are obtained as the fruits are collected during once over-harvesting period. Immature seeds collected in once over-harvest may cause quality losses in the seed lot. Hence, this study was conducted to determine the effect of after-ripening on mature and immature pepper seeds produced in organic and conventional production systems. To see the effect of after-ripening treatment, seeds were harvested in two different periods (immature 45-50 day after anthesis(DAA) and mature 60-65DAA). After-ripening(AR) was performed by keeping the seeds in fruits for 7 days after harvesting the fruits. Effect of production systems and after-ripening on immature and mature pepper seed lots were assessed for four cultivars harvested in 2015 and 2016. After-ripening increased germination (AR:76.3%, C:28% for organic and AR:88%, C:53.8% for conventional), seedling emergence (AR:70.8%, C:44.3% for organic and AR:82.5%, C:53.8% for conventional) percentages and mean weight of 1000 seeds (AR:6.5, C:6.0g for organic and AR:6.5, C:6.2g for conventional) in both production systems of immature seed lots compared to control (C)(P<0.05) but did not have a similar effect on mature ones. Moreover, organically-produced seed lots have the same quality as conventionally-produced seeds. Consequently, obtained results indicate that after-ripening can be used to enhance the quality of immature seeds of pepper cultivars and seeds can be produced organically without any loss of quality.
Źródło:
Plant Breeding and Seed Science; 2020, 81; 33-46
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cypriot economic system in the Late Classical and Early Hellenistic Periods. An analysis based on the ceramic evidence
Autorzy:
Borowicz, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/442437.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Instytut Archeologii
Tematy:
Cypriot economics
Late Classical/Early Hellenistic Periods
pottery
Opis:
The turn of the 4th and 3rd century B.C. is the time of great political and economical change in Cyprus. The extensive analysis of various literary and historical sources supplemented by the ceramic data allows us to present the economic system of Cyprus as characterized by the following features at the turn of the Classical and Hellenistic periods: (1) the primary role of port cities; (2) a significant role of cabotage trade; (3) the division of the island into the "rich" coast, which participated in the Mediterranean "life" and the “poor” interior reduced to the role of the raw material base; (4) the existence of two parallel economic cycles: closed, internal cycle associated with what we might call "household economy", and the open cycle, connected with regular urban markets; (5) the limited movement of resources between port cites and inland settlements; (6) the basic role of Cypriot sanctuaries, which functioned as local centres of economic life (e.g. "industrial" production); (7) the autarkic nature of these Cypriot kingdoms which had direct access to the sea; (10) the “life” of the economic system of Cyprus was defined by the half-year cycle. Furthermore, in terms of transformation of the system, we might conclude that: (1) at the turn of the 4th and 3rd century B.C. there is no visible significant break in the development of the economic structure of Cyprus. It appears that the economic transformation was not a drastic process; (2) the changes that occurred in the economic structure of Cyprus influenced mostly the large coastal cities that were the local centres of the system; (3) in the sphere of internal relations, the final division of Cyprus into the western isolated part and economically well-developed eastern part vanished. From the methodological point of view the collected observations allowed to conclude that every economic system can be studied in view of its structure – the relationship between and the configuration of its items. One can also focus attention on the (self)development of the system, or on the phenomenon of coordination (in time and space) of behaviour of individual/groups of variables. Nevertheless, in this research, particular emphasis was placed on the process of development of the system and the problem of its discontinuation in relation to the evolution of variables relevant for its structure. The author focused on the processes of transformation and dynamic nature immanent to all systems. This is due to the author’s general conviction about the artificiality of divisions in the post-Droysen world, which marks sharp boundaries between "Classical" and "Hellenistic" periods.
Źródło:
Recherches Archéologiques Nouvelle Serie; 2010, 2; 33-41
0137-3285
Pojawia się w:
Recherches Archéologiques Nouvelle Serie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany uwilgotnienia gleb polderu Nielegowo w okresach wegetacyjnych lat 2005 do 2007
Changes of water content in soils of Nielegowo polder during vegetation periods of years 2005 to 2007
Autorzy:
Przybyła, C.
Kozaczyk, P.
Sielska, I.
Bykowski, J.
Mrozik, K.
Powiązania:
https://bibliotekanauki.pl/articles/1819818.pdf
Data publikacji:
2009
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
polder
uwilgotnienie
okres wegetacyjny
vegetation periods
water content
Opis:
Zasoby wodne Wielkopolski są stosunkowo niewielkie. Nawet w latach przeciętnych i mokrych w środkowej części dorzecza Warty, występują niedobory wody w okresie wegetacyjnym, w którym suma opadów waha się od 240 do 290 mm, a w latach suchych nie przekracza połowy tej wartości [2, 7]. Wielkopolska jest obszarem o największych deficytach wody w Polsce, które dodatkowo ulegają stopniowemu pogłębianiu, gdy średnie roczne opady atmosferyczne z wielolecia są niższe lub zbliżone do 500 mm. [5].Bilans wodny kształtowany jest przede wszystkim przez warunki meteorologiczne,głównie zaś przez ilość i rozkład opadów atmosferycznych oraz ewapotranspirację rzeczywistą. Woda glebowa jest dynamicznym składnikiem gleby, ulegającym zmianom w cyklu rocznym. Zmiany te są uzależnione od dopływu wody do gleby, jej krążenia w obrębie gleby oraz odpływu wody poza profil glebowy. Istotnym czynnikiem gospodarki wodnej gleb jest także poziom występowania zwierciadła wód gruntowych oraz ich wpływ na uwilgotnienie wierzchnich warstw gleby [8, 6]. Gospodarka wodna gleb decyduje zarówno o ilości wody dostępnej dla roślin w sezonie wegetacyjnym jak również o ilości wody infiltrującej przez glebę do wód gruntowych [3, 4]. Zlewnia Kościańskiego Kanału Obry, do której należy Rów Wonieść, obejmuje obszar na styku strefy brzegowej zlodowacenia bałtyckiego z płaskimi równinami morenowymi z okresu zlodowacenia środkowopolskiego [1]. Większe zróżnicowanie hipsometryczne jest rezultatem silnego rozmycia denno morenowej równiny zlodowacenia środkowopolskiego przez wody roztopowe. Utwory czwartorzędowe mają miąższość od około 20 m do ponad 80 m i reprezentowane są przez gliny zwałowe tych zlodowaceń oraz osady fluwioglacjalne i interglacjalne. Celem pracy była ocena wpływu warunków meteorologicznych na zmiany zapasów wody w analizowanych glebach na polderze Nielęgowo w okresach wegetacji lat 2005 do 2007.
Weather conditions, especially rainfalls in Wielkopolska region, are characterized by wide variability of space and time. This region is especially exposed to atmospheric,hydrologic, and soil droughts, which may diminish crops.This work presents an influence of weather conditions on changes in water retentiondynamics in soil of regions: Nielegowo and Kościański Channel of Obra duringvegetation period in 2005-2007. There have been analyzed the soil moisture, reflection of ground water profiles. Profile 1 (mursh ground) was located 15 meters from melioration ditch, and the profile 2 (mursh soil) was 400 m from the ditch mentioned above.Periods of vegetation in 2005 and 2006 shoved average rainfalls, however in the year 2007, the vegetation period was counted to average dry ones.It was found that water retention in the analyzed soil profiles depended not only on the aggregation of rainfalls but also on their distribution. On the profile 1 which was located in the region under influence of the melioration ditch, the water retention during three year period of experimentation, as well as in the 0-50 cm layer, as well as 0-100 cm , were located in the field water capacity and the critical water content. The mean level of ground water in the soil profile was 104 cm below surface layer and it exerted an influence on water content of this profile.In the profile 2, which was located 400 m from melioration ditch water retention in the soil layer 0-50cm was falling multiple times below critical soil moisture. In vegetation period in 2006, retention was getting closer to moisture of permanent wilting point. Oscillation of ground water was between 83 cm (April 2005) and 155 cm (September 2005) below soil surface.
Źródło:
Rocznik Ochrona Środowiska; 2009, Tom 11; 899-910
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Runoff Hydrographs Using Snyder and SCS Synthetic Unit Hydrograph Methods: A Case Study of Selected Rivers in South West Nigeria
Autorzy:
Salami, A. W.
Bilewu, S. O.
Ibitoye, B. A.
Ayanshola, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/125238.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
unit hydrograph
runoff hydrograph
storm duration
watershed
return periods
Opis:
This paper presents the development of runoff hydrographs for selected rivers in the Ogun-Osun river catchment, south west, Nigeria using Snyder and Soil Conservation Service (SCS) methods of synthetic unit hydrograph to determine the ordinates. The Soil Conservation Service (SCS) curve Number method was used to estimate the excess rainfall from storm of different return periods. The peak runoff hydrographs were determined by convoluting the unit hydrographs ordinates with the excess rainfall and the value of peak flows obtained by both Snyder and SCS methods observed to vary from one river watershed to the other. The peak runoff hydrograph flows obtained based on the unit hydrograph ordinate determined with Snyder method for 20-yr, 50-yr, 100-yr, 200-yr and 500-yr, return period varied from 112.63 m3/s and 13364.30 m3/s, while those based on the SCS method varied from 304.43 m3/s and 6466.84 m3/s for the eight watersheds. However, the percentage difference shows that for values of peak flows obtained with Snyder and SCS methods varies from 13.14% to 63.30%. However, SCS method is recommended to estimate the ordinate required for the development of peak runoff hydrograph in the river watersheds because it utilized additional morphometric parameters such as watershed slope and the curve number (CN) which is a function of the properties of the soil and vegetation cover of the watershed.
Źródło:
Journal of Ecological Engineering; 2017, 18, 1; 25-34
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dziecko i dzieciństwo w percepcji dzieci kończących edukację przedszkolną i wczesnoszkolną
Autorzy:
Guz, Sabina
Powiązania:
https://bibliotekanauki.pl/articles/606635.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
child, childhood, periods of life
dziecko, dzieciństwo, okresy życia
Opis:
Child and childhood are categories that are difficult to define as they gain different meanings depending on changing historical periods, cultural and environmental circles and scientific theories developed within different scientific disciplines. These meanings significantly influence the situation of the child in society at a specific place and time, as well as the shape and quality of his relationships with adults and the life experiences he gains. The study presents a picture of a child and his childhood formed in the awareness of modern children finishing pre-school and early childhood education. The basis for this picture was an analysis of children’s responses to the questions asked during individual interviews.
Dziecko i dzieciństwo to kategorie, które trudno jest jednoznacznie określić. Przybierają one bowiem różne znaczenia zależnie od zmieniających się okresów historycznych, kręgów kulturowych i środowiskowych oraz teorii naukowych, rozwijanych w ramach różnych dyscyplin badawczych. Znaczenia te w istotny sposób rzutują na sytuację dziecka w społeczeństwie w określonym miejscu i czasie, a także na kształt i jakość jego relacji z osobami dorosłymi oraz nabywane przez nie doświadczenia życiowe. Przedstawione w opracowaniu badania ukazują, jaki obraz dziecka i dzieciństwa ukształtował się w świadomości współczesnych dzieci kończących edukację przedszkolną i wczesnoszkolną. Podstawę do nakreślenia tego obrazu stanowiła analiza odpowiedzi dzieci na pytania zadane im w czasie indywidualnych rozmów.
Źródło:
Lubelski Rocznik Pedagogiczny; 2018, 37, 1
0137-6136
Pojawia się w:
Lubelski Rocznik Pedagogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tendencies in climate changes in Poland and Ukraine during the last centuries and their causes
Autorzy:
Boryczka, Jerzy
Stopa-Boryczka, Maria
Mucha, Bohdan
Miłaszewska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2030336.pdf
Data publikacji:
2008-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
air temperature
NAO
solar activity
spectrum
periods
tendencies
forecast
Opis:
The paper describes tendencies in changes of air temperature in Poland and Ukraine on the basis of a long series of measurements made in Warsaw (1779-2000), Cracow (1826-2000), Lviv (1824-2002) and Kiev (1812-2002). Air temperature in these cities in the years 1825-2002 is positively correlated with the North Atlantic Oscillation (NAO) Index. Values of the r correlation coefficient are much higher in winter months than during the summer and they decrease with distance from the Atlantic Ocean. Of interest are air temperature changes in Warsaw, Cracow, Lviv and Kiev in the XIXth -XXth centuries together with forecasts until the year 2100. Significant dependence of the climate of Poland and Ukraine on the NAO index stems from similar temperature cycles and the eight-year, eleven-year and one-hundred-year NAO index. Forecast credibility results from the similar periodicity of air temperature, the NAO index and solar activity. The forecast mean annual temperature values for 2001-2100 were obtained from the interference of statistically important temperature cycles, determined by the sinusoidal regression method.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2008, 13; 77-88
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the North Atlantic Oscillations (NAO) on the climate of Warsaw and Lviv
Autorzy:
Boryczka, Jerzy
Mucha, Bohdan
Stopa-Boryczka, Maria
Wawer, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/2030355.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
air temperature
NAO
spectrum
periods
tendencies
Wolf number
forecast
Opis:
The objective of the work is to determine the periodicity and trends of change in air temperature in Warsaw and in Lviv during the 18th-20thcenturies, together with the forecast for the years 2000-2100. There are interesting diagrams of temporal changes of the North Atlantic Oscillation (NAO) indicator and air temperature, with the forecast reaching the year 2100. The forecasts were obtained on the basis of interpretations of the Sun activity and the NAO indicator cycles, determined with the method of ”regression sinusoids”. The fluctuations of air temperature and North Atlantic Oscillation during winter in Warsaw and in Lviv are closely correlated.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 75-80
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the choice of the number of Monte Carlo iterations and bootstrap replicates in Empirical Best Prediction
Autorzy:
Chwila, Adam
Żądło, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1363588.pdf
Data publikacji:
2020-06-05
Wydawca:
Główny Urząd Statystyczny
Tematy:
survey sampling
economic longitudinal data
prediction for future periods
Opis:
Empirical Best Predictors (EBPs) are widely used for small area estimation purposes. In the case of longitudinal surveys, this class of predictors can be used to predict any given population or subpopulation characteristic for any time period, including future periods. Generally, the value of an EBP is computed by means of Monte Carlo algorithms, while its MSE is usually estimated using the parametric bootstrap method. Model-based simulation studies of the properties of the predictors require numerous repetitions of the random generation of population data. This leads to a question about the dependence between the number of iterations in all the procedures and the stability of the results. The aim of the paper is to show this dependence and to propose methods of choosing the appropriate number of iterations in practice, using a set of real economic longitudinal data available at the United States Census Bureau website.
Źródło:
Statistics in Transition new series; 2020, 21, 2; 35-60
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EU Accession and Migration: Evidence for Bulgarian Migration to Germany
Autorzy:
Kovacheva, Vesela
Powiązania:
https://bibliotekanauki.pl/articles/498667.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EU accession
free movement
migration patterns
Bulgarian migration
migration periods
Opis:
Bulgaria’s European Union accession in 2007 turned the country’s citizens from third-country nationals with restricted mobility rights into EU citizens with rights to free movement within the EU. Economic rights were restricted for seven years by transitional periods in the free movement of workers. This article explores changes in the Bulgarian migration pattern to Germany after 2007 in the specific context of free movement with restricted freedom to work, and analyses the extent to which those changes can be related to that particular regime. Starting from this point, Bulgarian migration patterns to Germany are overviewed and a periodisation of migration since the World War II is suggested. Changes in the dynamics, forms and composition of migration after EU accession in 2007 are analysed, based on administrative data and a small-scale survey among Bulgarian migrants in Hamburg. Both the administrative data and the survey results provide empirical grounding for a plausible relation between EU accession and migration patterns. The scale of migration has increased and more temporary migration has taken place. However, the rise of migration can be attributed not only to new migration from Bulgaria but also, to a large extent, to a redirection of migration flows from other destination countries and the legalisation of irregular migrants. Circular migration has lost to a great extent relevance which could be plausibly explained by changed migration strategies under a regime of free movement. Despite transitional periods in the free movement of workers, labour migration has become a predominant form of mobility. Transitional periods did not prevent migrants from moving to Germany but, given the reduced labour market opportunities, may have hampered their successful labour market integration.
Źródło:
Central and Eastern European Migration Review; 2014, 3, 2; 173-188
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The necropolis at Tell el-Farkha reconsidered
Autorzy:
Dębowska-Ludwin, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/442428.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Instytut Archeologii
Tematy:
Tell el-Farkha necropolis
Proto/Early Dynastic Periods
Naqada culture
Opis:
Works on the necropolis at Tell el-Farkha have reached the 9th season and resulted in locating over 100 burials. In this situation, almost every succeeding campaign was bringing such a number of new data that preliminary statements were continuously being changed almost year by year. Numerous analyses of pottery, stone vessels, architectural details and stratigraphy, finally, seem to lead to some more profound conclusions. According to them, all graves at Tell el-Farkha have been divided into 3 main chronological groups. Group 1 is the oldest one. It is dated back from Naqada IIIB phase to the middle of Dynasty 1. People buried in the graves of this group represented wealthy society, and they also experimented, trying to reach a perfect grave form. The process is the best explanation of the presence of so many “strange” structures and differences in position of the deceased, but on the other hand, also numerous elements of typically early dynastic burial custom (e.g. niche façades or subsidiary burials) seem to emerge in that time. Tombs belonging to the group 2 come from the middle of Dynasty 1 to late Dynasty 1 or even to early Dynasty 2. Main social features they express are stressing of wealth inequality and presence of clearly definite and quite strictly obeyed rules of burial ritual. However the graves of the younger group are clearly a continuation of the older custom and so the origin of both societies must have been similar, the changes in orientation of tombs as well as examples of younger burials cutting into older ones suggest that both groups were divided by short break in occupation of cemetery. The final phase (group 3) of the cemetery at Tell el-Farkha was surely separated from the previous ones by a much longer period of time. The tombs representing phase in question are distributed only in the highest part of the tell, and may be dated on the basis of stratigraphic observations to the beginning of the Old Kingdom. They characterise of very simple burial custom (all the bodies were found resting in simple pits) and are hardly equipped with any objects.
Źródło:
Recherches Archéologiques Nouvelle Serie; 2010, 2; 5-20
0137-3285
Pojawia się w:
Recherches Archéologiques Nouvelle Serie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyclic temperature and precipitation fluctuations in Poland in the 19th-21st centuries
Autorzy:
Boryczka, Jerzy
Stopa-Boryczka, Maria
Szmajda, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/2032472.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
air tem perature
precipitations
NAO
spectra
periods
tendency
solar activity
forecast
Opis:
The objective of the work is to determine the periodicity and trends of change in air temperature and precipitation in Poland in the time period of the 18th-20th centuries, together with the forecast for the 21st century. There are interesting diagrams of the temporal changes of solar activity and North Atlantic Oscillation (NAO) indicator, with the forecast reaching the year 2100. The forecasts were obtained on the basis of interpretations of the Wolf number and NAO indicator cycles, determined with the method of ”regression sinusoids”. The fluctuations of the air temperature and precipitations during w inter in Warsaw and in Cracow are closely correlated.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 43-53
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyclic changes of climate in Europe during the last millenium according to dendrological data
Autorzy:
Boryczka, Jerzy
Stopa-Boryczka, Maria
Bijak, Szymon
Miłaszewska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2029440.pdf
Data publikacji:
2008-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
air temperature
NAO
solar activity
spectrum
periods
tendencies
forecast
tree-rings
Opis:
The paper discusses periodic climate changes in Europe determined on the basis of dendrochronological data dating back one thousand years. In tree-ring width sequences of trees growing in Poland there are approximately 8-, 11-, 100- and 180- year periods. The tree-ring widths of oaks growing in Poland for the last centuries are characterised, without any significant amplitude, by 8- and 11-year periods (Tab. 1). In turn, chronologies of pine, spruce, larch, oak and fir growing in Europe are characterised by 100- and 180-year periods (Tab. 2). Cycles of dendrochronological variables approximate cycles of air temperature and North Atlantic Oscillation NAO as well as those of solar activity. The forecast of annual growth (ring width) for 2001-2100 was calculated by interference of the tree-ring width cycles determined by the sinusoidal regression method. Because of much longer empirical sequences of specific periods, the credibility of forecasts for treering widths is greater than that for air temperature.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2008, 13; 57-66
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case study: the exercise profile of a Polish representative in mountain running
Autorzy:
Borysiuk, Zbigniew
Piechota, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1055129.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
VO2max
individual training
long distance running
periods in sports training
Opis:
This study is aimed at analysing the variability of oxygen parameters in subsequent annual training cycles at championship training level in mountain running. The study employed the following indirect methods: the Astrand Test, Conconi Running Test, and also a direct method (Bruce Test). Research material is a young, talented 28-year-old athletic mountain runner. Research results were obtained within 4-5 years period, which were as follows: VO2max 83-90ml/kg/min - increased on average to 2-3 ml / kg / min per year, HR max 172-177 beats / min, PPA 158-169 beats / min. The case study was carried out within the framework of longitudinal research and was used to collect data for the formulation of a specific exercise profile in a new, dynamic sports discipline. The research aims to serve as an example of a novel method of conducting training microcycles to the cyclic lifting aerobic capacity athletes.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2014, 5, 1; 35-45
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 56

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