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Tytuł:
Firm Heterogeneity and International Trade Liberalisation: A Generalized Cournot Oligopoly Approach
Autorzy:
Cieślik, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/29431130.pdf
Data publikacji:
2024-03-28
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
Cournot oligopoly model
firm heterogeneity
imperfect competition
international trade liberalisation
market structure
Opis:
The main goal of this article is to contribute to the theoretical analysis of international trade under imperfect competition using the Cournot oligopoly model with heterogeneous firms. In particular, our objective is to provide some insights into the role of cost asymmetry in studying the effects of trade liberalisation in the Cournot oligopoly framework. In order to introduce firm heterogeneity into the oligopoly model we use the generalised Cournot framework with asymmetric firms that differ in terms of their productivity, levels of output and market shares. We show that trade liberalisation leads to the elimination of less productive firms and results in lower equilibrium prices, higher sales per firm and lower markups in the industry.
Źródło:
Central European Economic Journal; 2024, 11, 58; 67-78
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accounting for the random character of nucleation in the modelling of phase transformations in steels
Autorzy:
Poloczek, Łukasz
Kuziak, Roman
Foryś, Jakub
Szeliga, Danuta
Pietrzyk, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/29519774.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
stochastic model
grain size
phase transformations
dislocation density
cooling of rods
heterogeneity of the microstructure
Opis:
In our earlier work, a stochastic model of multi-stage deformation at elevated temperatures was developed. The model was applied to calculate histograms of dislocation density and grain size at the onset of phase transformation. The histograms were used as input data for the simulation of phase transitions using the traditional deterministic model. Following this approach, microstructural inhomogeneity was predicted for different cooling conditions. The results obtained, showing the effect of dislocation density and inhomogeneity of austenite grain size on the microstructural inhomogeneity of the final product, can be considered reliable as they are based on material models determined in previous publications and validated experimentally. The aim of the present work was to extend the model by taking into account the stochastic nature of nucleation during phase transitions. The analysis of existing stochastic models of nucleation was performed, and a model for ferritic transformation in steels was proposed. Simulations for constant cooling rates as well as for industrial cooling processes of steel rods were performed. In the latter case, uncertainties in defining the boundary conditions and segregation of elements were also considered. The reduction of the computing costs is an important advantage of the model, which is much faster when compared to full field models with explicit microstructure representation.
Źródło:
Computer Methods in Materials Science; 2023, 23, 2; 17-28
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Current Challenges for Preschool Primary Education
Aktualne wyzwania dla edukacji przedszkolnej i wczesnoszkolnej
Autorzy:
Enders, Angela
Hitzler, Rudolf
Gößinger, Christian
Powiązania:
https://bibliotekanauki.pl/articles/30148747.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
szkoła podstawowa
niejednorodność
rozwój językowy
edukacja w zakresie umiejętności czytania i pisania
indywidualna i adaptacyjna instrukcja
nowy poziom wejścia do szkoły
elementary school
heterogeneity
language development
literacy education
individualized and adaptive instruction
new school entry level
Opis:
Challenges for elementary and primary education in many areas neither occur in isolation nor are limited to individual states but often represent themselves as area-wide and complex problem situations. The text discusses how to deal with a heterogeneous student body in elementary schools, which has been exacerbated by immigration in recent years. The focus of reflection is on individual, instructional, and organizational approaches to make educational processes as fruitful as possible for all children.
Wyzwania stojące przed edukacją przedszkolną i wczesnoszkolną w wielu obszarach nie występują samodzielnie, ani nie ograniczają się do indywidualnych stanów, ale często przedstawiane są jako złożone sytuacje problemowe występujące na wielu obszarach naraz. W artykule omówiono sposoby radzenia sobie z niejednorodną grupą uczniów w szkołach podstawowych, w sytuacji zaostrzonej w ostatnich latach za sprawą imigracji. Przedstawione w tekście rozważania skupiają się na indywidualnym, instruktażowym i organizacyjnym podejściu do tego, aby procesy edukacyjne były jak najbardziej owocne dla wszystkich dzieci.
Źródło:
Nauki o Wychowaniu. Studia Interdyscyplinarne; 2023, 17, 2; 29-45
2450-4491
Pojawia się w:
Nauki o Wychowaniu. Studia Interdyscyplinarne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating snowplow-related injury severity along mountainous roadway in Wyoming
Autorzy:
Haq, Muhammad Tahmidul
Reza, Imran
Ksaibati, Khaled
Powiązania:
https://bibliotekanauki.pl/articles/2204253.pdf
Data publikacji:
2023
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
winter highway maintenance
snowplows
injury severity
mixed logit model
unobserved heterogeneity
Wyoming
environment
Opis:
Snow removal and deicing using snowplow trucks assist transportation agencies to enhance roadway safety and mobility. However, due to slower travel speeds during these operations, motorists often end up in crashes for poor visibility and disturbance of the snow. Despite the risk associated with snowplows, no previous study was found that exclusively investigate the factors associated with injury severity in snowplow-involved crashes. Therefore, this paper presents an extensive exploratory analysis and fills this knowledge gap by identifying the significant contributing factors affecting the occupant injury severity from the aspects of crashes with snowplow involvement. The study utilized eleven years (2010-2020) of historical snowplow-related crash data from Wyoming. Both the binary logit model and mixed binary logit model were developed to investigate the impacts of the various occupant, vehicle, crash, roadway, and environmental characteristics on the corresponding occupant injury severity. As one of the important findings from this research concludes that other vehicle drivers are more responsible than snowplow drivers contributing to more severe injuries in crashes involving snowplows. Recommendations suggested based on the modeling results are expected to help transportation agencies and policymakers take necessary actions in reducing snowplow-involved crashes by targeting appropriate strategies and proper resource allocation.
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2023, 8, 1; 73--88
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pojęcie interdyscyplinarności w pracy socjalnej. Integrująca rola pedagogiki w budowaniu teorii pracy socjalnej
The Concept of Interdisciplinarity in Social Work. The Integrative Role of Pedagogy in Building of the Theory of Social Work
Autorzy:
Waga, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/29519497.pdf
Data publikacji:
2023-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
theoretical foundations of social work
social pedagogy
interdisciplinarity
heterogeneity of social work
disciplinarization of social work
teoretyczne podstawy pracy socjalnej
pedagogika społeczna
interdyscyplinarność
heterogeniczność pracy socjalnej
dyscyplinaryzacja pracy socjalnej
Opis:
The aim of the article is to show the presence of the concepts of interdisciplinarity, multidisciplinarity and heterogeneity in scientific texts in the field of social work, to compare the methodological status of social pedagogy and social work as areas of scientific knowledge also created thanks to interdisciplinary research, and to propose the postulate of the superiority of the pedagogical epistemological and methodological perspective in building theoretical foundations. Social work. It was pointed out that social pedagogy, both in the historical, institutional and subject and content aspects, is closely related to the basics of social work. Taking into account the scope of issues analyzed by social work and its methodological and historical conditions, a structured way of understanding the concept of interdisciplinarity of social work and locating it in the area of social pedagogy was proposed, calling the process of this location subdisciplinarization of social work. The problems discussed in the article are of a meta-theoretical and meta-methodological nature, and the main source of the research are texts on the basics of pedagogy and social work.
Celem artykułu jest prezentacja obecności pojęć: interdyscyplinarności, wielodyscyplinarności i heterogeniczności w tekstach naukowych z zakresu pracy socjalnej, porównanie statusu metodologicznego pedagogiki społecznej i pracy socjalnej jako obszarów wiedzy naukowej tworzonej także dzięki badaniom interdyscyplinarnym oraz zaproponowanie postulatu nadrzędności pedagogicznej perspektywy epistemologicznej i metodologicznej w budowaniu teoretycznych podstaw pracy socjalnej. Wskazano, że pedagogika społeczna, zarówno w aspekcie historycznym, instytucjonalnym, jak i przedmiotowym, treściowym, jest ściśle związana z podstawami pracy socjalnej. Uwzględniając zakres zagadnień analizowanych przez pracę socjalną oraz jej uwarunkowania metodologiczne i historyczne, zaproponowano uporządkowany sposób rozumienia pojęcia interdyscyplinarności pracy socjalnej oraz ulokowanie jej w obszarze pedagogiki społecznej, nazywając proces tego ulokowania subdyscyplinaryzacją pracy socjalnej. Podejmowane w artykule problemy mają charakter metateoretyczny i metametodologiczny, a głównym źródłem prowadzonych badań są teksty z zakresu podstaw pedagogiki i pracy socjalnej.
Źródło:
Viae Educationis; 2023, 2, 4; 43-50
2956-2856
Pojawia się w:
Viae Educationis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial-temporal heterogeneity and driving factors of water yield services in Citarum river basin unit, West Java, Indonesia
Autorzy:
Nahib, Irmadi
Ambarwulan, Wiwin
Sutrisno, Dewayany
Darmawan, Mulyanto
Suwarno, Yatin
Rahadiati, Ati
Suryanta, Jaka
Prihanto, Yosef
Radiastuti, Aninda W.
Lumban-Gaol, Yustisi
Powiązania:
https://bibliotekanauki.pl/articles/27311534.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
water yields
climate
land use land cover
InVEST Model
geographically weighted regression
socio-ecological model
Opis:
Many countries, including Indonesia, face severe water scarcity and groundwater depletion. Monitoring and evaluation of water resources need to be done. In addition, it is also necessary to improve the method of calculating water, which was initially based on a biophysical approach, replaced by a socio-ecological approach. Water yields were estimated using the Integrated Valuation of Ecosystem Services and Trade-offs (InVEST) model. The Ordinary Least Square (OLS) and geographic weighted regression (GWR) methods were used to identify and analyze socio-ecological variables for changes in water yields. The purpose of this study was: (1) to analyze the spatial and temporal changes in water yield from 2000 to 2018 in the Citarum River Basin Unit (Citarum RBU) using the InVEST model, and (2) to identify socio-ecological variables as driving factors for changes in water yields using the OLS and GWR methods. The findings revealed the overall annual water yield decreased from 16.64 billion m3 year-1 in the year 2000 to 12.16 billion m3 year-1 in 2018; it was about 4.48 billion m3 (26.91%). The socio-ecological variables in water yields in the Citarum RBU show that climate and socio-economic characteristics contributed 6% and 44%, respectively. Land use/Land cover (LU/LC) and land configuration contribution fell by 20% and 40%, respectively.The main factors underlying the recent changes in water yields include average rainfall, pure dry agriculture, and bare land at 28.53%, 27.73%, and 15.08% for the biophysical model, while 30.28%, 23.77%, and 10.24% for the socio-ecological model, respectively. However, the social-ecological model demonstrated an increase in the contribution rate of climate and socio-economic factors and vice versa for the land use and landscape contribution rate. This circumstance demonstrates that the socio-ecological model is more comprehensive than the biophysical one for evaluating water scarcity.
Źródło:
Archives of Environmental Protection; 2023, 49, 1; 3--24
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal and spatial heterogeneity of the Ailaoshan–Song Ma–Song Chay ophiolitic mélange, and its significance on the evolution of Paleo-Tethys
Autorzy:
Lin, Wei
Liu, Fei
Wang, Ying
Meng, Lingtong
Faure, Michel
Chu, Yang
Nguyen, Vuong Van
Wu, Qinying
We, Wei
Thu, Hoai Luong Thi
Vu, Tich Van
Powiązania:
https://bibliotekanauki.pl/articles/24202127.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Tethys
heterogeneity
Vietnam
Opis:
The ophiolite is the direct evidence to restore the oceanic evolution, and it is used to identify the convergence boundary of the plates. Compared with ophiolite, ophiolitic mélange, especially its matrix, contains more information about the evolution of ocean. The evolution of eastern Paleo-Tethys, between the South China and Indochina blocks, recorded the whole process of rifting from Gondwana and their northward migration and convergence. To understand the tectonic implications from matrix of ophiolitic mélange, the Mesozoic Paleo-Tethys Ailaoshan–Song Ma–Song Chay suture zone located in the North Vietnam–Southeast Yunnan region acts as an ideal study area. Based on the structural geology, we reviewed previous zircon U-Pb dating and Lu-Hf isotopic analyses on the detrital zircon from the Ailaoshan–Song Ma–Song Chay ophiolitic mélange. Accordingly, we subdivide the matrix of these ophiolitic mélange into four parts (M1, M2, M3, and M4; Fig. 1). M1 is mainly located in the middle segment of the Ailaoshan–Song Ma belt. It shows age peaks of 440 Ma and 960 Ma with εHf(t) values of −19.6 ~ +10.3. M2 is mainly located in the NW segment of the Ailaoshan–Song Ma belt, showing a dominant age peak of ~260 Ma. Particularly, it has εHf(t) values of −28.9 ~ +8.1. M3 is mainly located in the SE segment of the Ailaoshan–Song Ma belt, showing the peaks at ~250 Ma, 440 Ma, and 960 Ma with εHf(t) values of −21.9 ~ +10.1. M4 is mainly located in the Song Chay belt, showing the peaks at ~310 Ma, 470 Ma, 610 Ma, 770 Ma, and 965 Ma with εHf(t) values of −28.2 ~ +10.8. The geochronological data of the detrital zircon from the matrix of the Ailaoshan– Song Ma–Song Chay ophiolitic mélange zone, documents a temporal heterogeneity between the M1, M2, M3, and M4 units, which formed at 310–270 Ma, 265–250 Ma, 245–240 Ma, and 310–255 Ma, respectively. The different components and provenances of each unit reflect a strike-parallel heterogeneity (Fig. 1). The M1 unit was mainly sourced from the Paleozoic sedimentary rocks of the Indochina Block (IB). The main provenance for the M2 unit is Emeishan Large Igneous Province (ELIP). The magmatic arc developed in the IB provided the materials for the M3 unit, and the detrital materials of the M4 were mainly sourced from the South China Block (SCB) (Fig. 1). The Cenozoic strike-slip deformation led to an inverted geometry of the M1, M2, and M3 units, accounting for a strike-perpendicular heterogeneity straight to the strike of the orogenic belt. The temporal, strike-parallel, and strike-perpendicular heterogeneity help us to decipher the tempo-spatial evolution of the Paleo-Tethys. The M1, M2, M3, and M4 units contain information from different evolutionary stages, likely recording the comprehensive history of the ancient oceanic basin. Importantly, our results demonstrate that both the active continental margin of the IB and the passive continental margin of the SCB acted as provenance sources that supplied significant amount of detrital material in the ophiolitic mélange matrix, indicating that the Paleo-Tethys Ocean was a “narrow” or “limited” ocean rather than the archipelagic ocean proposed before.
Źródło:
Geotourism / Geoturystyka; 2023, 1-2 (72-73); 42--43
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic Performance of Agriculture in the European Union Countries
Wyniki ekonomiczne w rolnictwie w krajach Unii Europejskiej
Autorzy:
Rađenović, Žarko
Krstić, Bojan
Marković, Milan
Powiązania:
https://bibliotekanauki.pl/articles/2130399.pdf
Data publikacji:
2022-03-28
Wydawca:
Instytut Ekonomiki Rolnictwa i Gospodarki Żywnościowej - Państwowy Instytut Badawczy
Tematy:
wskaźniki rolnicze
heterogeniczność rolnictwa europejskiego
homogeniczne grupy krajów
analiza klastrów
metoda Warda
agricultural indicators
heterogeneity of European agriculture
homogeneous country groups
cluster analysis
Ward’s method
Opis:
The aim of the research is to classify the European Union (EU) countries based on the progress in the economic performance of agriculture. The originality of the paper stems from the fact that a new set of indicators (in relative form) was used to identify the clusters. The following indicators are used to assess the economic performance of the EU agricultural sector (by cluster analysis) for two periods (2015–2017 and 2018–2020): total labor force input, real income of factors in agriculture per annual work unit, total agricultural output, gross value added of the agricultural industry, and animal output. The study confirmed that EU countries, according to changes in agricultural performance, differ significantly. They were grouped into four relatively homogeneous clusters according to their similarity, with a clear geographical dispersion for both analyzed periods. Identifying development disparities between EU countries can be useful in future redesigns of the Common Agricultural Policy measures in terms of increased support to certain members.
Celem badań jest klasyfikacja krajów Unii Europejskiej (UE) na podstawie postępu w wynikach ekonomicznych w rolnictwie. Oryginalność artykułu wynika z faktu, że do identyfikacji klastrów zastosowano nowy zestaw wskaźników (w postaci względnej). Do oceny wyników ekonomicznych sektora rolnego UE (poprzez analizę klastrów) dla dwóch okresów (2015–2017 i 2018–2020) stosuje się następujące wskaźniki: całkowity nakład siły roboczej, rzeczywisty dochód czynników w rolnictwie na roczną jednostkę pracy, produkcja rolna ogółem, wartość dodana brutto przemysłu rolnego oraz produkcja zwierzęca. Badanie potwierdziło, że kraje UE znacznie się różnią pod względem zmian wyników rolniczych. Zostały one pogrupowane w cztery stosunkowo jednorodne klastry według podobieństwa, z wyraźnym rozproszeniem geograficznym dla obu analizowanych okresów. Identyfikacja dysproporcji rozwojowych pomiędzy krajami UE może być przydatna w przyszłych przekształceniach środków wspólnej polityki rolnej pod kątem zwiększonego wsparcia dla niektórych członków.
Źródło:
Zagadnienia Ekonomiki Rolnej; 2022, 370, 1; 5-21
0044-1600
2392-3458
Pojawia się w:
Zagadnienia Ekonomiki Rolnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating urban vulnerability to flood and heat hazards: A case study in the municipality of Thessaloniki, Greece
Autorzy:
Lazaridis, Vasileios
Latinopoulos, Dionysis
Powiązania:
https://bibliotekanauki.pl/articles/54150901.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
urban vulnerability
urban heat island
spectral indices
flood risk
spatial heterogeneity
Opis:
Continuous urban expansion, the conversion of open land to built-up areas and increased energy consumption have diversified the microclimates of cities. These phenomena combined with climate change hazards increase the vulnerability of cities, in a spatially heterogeneous way. Therefore, cities should become more resilient to those threats, by identifying and prioritising highly vulnerable areas. The main purpose of this study is to develop a spatial-based approach to assess the vulnerability of climate-related hazards in the urban environment of Thessaloniki (Greece). In this context, spatial and temporal patterns of land surface temperature were estimated through the calculation of various spectral indices, to conduct an analytical Urban Heat Island vulnerability assessment. Furthermore, the FloodMap-Pro application was used to identify coastal areas that are vulnerable to sea level rise, while historical floods were digitised in order to identify potential urban (flash) flood zones. The most important outcome of this paper is the creation of an integrated spatial vulnerability index, which identifies the urban areas that are prone to all these hazards. The final vulnerability map illustrates how the city of Thessaloniki is exposed to several climate-related hazards and that many areas/neighbourhoods are prone to one or more risk factors.
Źródło:
European Spatial Research and Policy; 2022, 29, 2; 309-340
1231-1952
1896-1525
Pojawia się w:
European Spatial Research and Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geltungsnoematische Struktur als Formalismus: Werner Flachs Negation und Andersheit heute
Noematic Validity Structure as Formalism Werner Flach’s Negation und Andersheit Today
Autorzy:
Krijnen, Christian
Powiązania:
https://bibliotekanauki.pl/articles/29520889.pdf
Data publikacji:
2022
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
transcendental philosophy
Werner Flach
a priori
validity noematic structure
radical foundation
origin
heterogeneity
reflection
external reflection
absolute reflection
self-constitution
Hans Wagner
Heinrich Rickert
Kant
Hegel
formalism
negation
heterology
Opis:
Hegel criticizes the mode of reflection that is typical of the transcendental philosophy of his age. The present article explores the relevance of Hegel’s criticism with regard to contemporary transcendental philosophy, in particular that of Werner Flach. Christian Krijnen shows that, despite substantial modifications of Kant’s conception of transcendental philosophy, not least inspired by Hegel, contemporary transcendental philosophy absolutizes the logic of essence. More precisely, from the perspective of its mode of reflection, contemporary transcendental philosophy basically is an absolutized form of external reflection.
Źródło:
Folia Philosophica; 2022, 47; 1-53
1231-0913
2353-9445
Pojawia się w:
Folia Philosophica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global behavior of a multi-group SEIR epidemic model with spatial diffusion in a heterogeneous environment
Autorzy:
Liu, Pengyan
Li, Hong-Xu
Powiązania:
https://bibliotekanauki.pl/articles/2134056.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
global stability
multigroup epidemic model
spatial heterogeneity
spatial diffusion
globalna stabilność
wielogrupowy model epidemii
różnorodność przestrzenna
dyfuzja przestrzenna
Opis:
In this paper, we propose a multi-group SEIR epidemic model with spatial diffusion, where the model parameters are spatially heterogeneous. The positivity and ultimate boundedness of the solution, as well as the existence of a global attractor of the associated solution semiflow, are established. The definition of the basic reproduction number is given by utilizing the next generation operator approach, whereby threshold-type results on the global dynamics in terms of this number are established. That is, when the basic reproduction number is less than one, the disease-free steady state is globally asymptotically stable, while if it is greater than one, uniform persistence of this model is proved. Finally, the feasibility of the main theoretical results is shown with the aid of numerical examples for a model with two groups.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 271--283
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of reservoir heterogeneity on the control of water encroachment into gas-condensate reservoirs during CO2 injection
Autorzy:
Matkivskyi, Serhii
Burachok, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/2175871.pdf
Data publikacji:
2022
Wydawca:
STE GROUP
Tematy:
3D reservoir model
numerical simulation
enhanced gas recovery (EGR)
gas-condensate reservoir
water drive
trapped gas
carbon dioxide (CO2) injection
Opis:
The paper evaluates application of CO2 injection for the control of water encroachment from the aquifer into gas-condensate reservoir under active natural water drive. The results of numerical simulations indicated that injection of CO2 at the initial gas-water contact (GWC) level reduces the influx of water into gas-bearing zone and stabilizes the operation of production wells for a longer period. The optimum number of injection wells that leads to the maximum estimated ultimate recovery (EUR) factor was derived based on statistical analysis of the results. The maximum number of injection wells at the moment of CO2 break-through into production wells for homogeneous reservoir is equal to 6.41 (6) and for heterogeneous – 7.74 (8) wells. Study results indicated that with the increase of reservoir heterogeneity, denser injection well pattern is needed for the efficient blockage of aquifer water influx in comparison to homogeneous one with the same conditions. Gas EUR factor for the maximum number of injection wells in homogenous model is equal 64.05% and in heterogeneous – 55.56%. Base depletion case the EURs are 51.72% and 49.44%, respectively. The study results showed the technological efficiency of CO2 injection into the producing reservoir at initial GWC for the reduction of water influx and improvement of ultimate hydrocarbon recovery.
Źródło:
Management Systems in Production Engineering; 2022, 1 (30); 62--68
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odziedziczyć język, czyli o współczesnych problemach i wyzwaniach nauczania języka polskiego jako języka pochodzenia
To Inherit a Language, i.e. on the Contemporary Problems and Challenges of Teaching Polish as a Heritage Language
Autorzy:
Niesporek-Szamburska, Bernadeta
Powiązania:
https://bibliotekanauki.pl/articles/31341737.pdf
Data publikacji:
2022
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
język polski jako odziedziczony
heterogeniczność grup
nowe technologie
nauka online
szkoła sobotnia
Polish as an inherited language
group heterogeneity
new technologies
online learning
Saturday school
Opis:
Podtrzymywanie i rozwijanie znajomości języka polskiego jako odziedziczonego, także przybliżanie dziedzictwa kulturowego kraju pochodzenia, nie jest łatwym zadaniem. Autorka wychodzi od określenia pojęcia języka odziedziczonego. Kolejno przedstawia wybrane problemy, z jakimi spotykają się uczący języka polskiego jako języka pochodzenia w szkołach poza granicami kraju. Zwraca uwagę na zróżnicowanie poziomu znajomości języka w grupach uczniów i wskazuje na jego uwarunkowania. Wskazuje też nowe konteksty: świat technologii – bliski uczniom oraz pandemię, która utrudniła naukę, ale także przyspieszyła unowocześnianie narzędzi dydaktycznych oraz podniosła kompetencje nauczycieli w posługiwaniu się nimi. Autorka dokonuje także krytycznej analizy podstawy programowej oraz oferty materiałów dydaktycznych dla szkół polonijnych – nie zawsze odpowiadających wymogom procesu dydaktycznego i nowoczesnym realiom.
Maintaining and developing the knowledge of Polish as an inherited language, and bringing the cultural heritage of the country of origin closer, is not an easy task. The author starts with a definition of the concept of an inherited language. Next, selected problems faced by teachers of Polish as the language of origin in schools abroad are presented. The author points to the differentiation of the level of language proficiency in groups of students and indicates its determinants. She also shows new contexts: the world of technology, which is close to the students, and the pandemic that made learning difficult but also accelerated the modernisation of teaching tools and increased the competence of teachers in using them. The author also makes a critical analysis of the core curriculum and the offer of didactic materials for Polish diaspora schools, which do not always meet the requirements of the didactic process or modern realities.
Źródło:
Roczniki Humanistyczne; 2022, 70, 10; 45-60
0035-7707
Pojawia się w:
Roczniki Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The optimum strategy for mode choice modelling of interregional fish transport considering shippers heterogeneity
Autorzy:
Ansu, V.
Anjaneyulu, M. V. L. R.
Powiązania:
https://bibliotekanauki.pl/articles/2173935.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fish transport
mode choice of transport
latent class analysis
optimal strategy
transport ryb
wybór środka transportu
strategia optymalna
Opis:
The determinants of mode choice of interregional transport of fish, which is highly perishable, vastly differ from that of other commodities. These determinants are to be identified to improve transport efficiency. A questionnaire survey of shippers is used to collect the data. Highly correlated observed variables are combined to form four latent factors by factor analysis to reduce the errors in modelling. Logical relations among the component variables of latent factors are perceived, and mathematical formulations are used to estimate new variables. It is found that transportation costs and shipment weight contributes to factor 1, while distance contributes to factor 2. However, transportation costs are associated with distance and shipment weight. Thus, the variable, transportation cost per q-km, is estimated. Survey respondents' attitudes are also incorporated into modelling by including qualitative factors obtained by the factor analysis of shippers' preference ratings. A latent class analysis confirmed the existence of heterogeneity among shippers. Misrepresentations of effects occur in modelling if the heterogeneity in the data is not considered. No studies have found the best combination of observed variables, latent factors, estimated variables, and qualitative factors, considering shippers' heterogeneity in freight mode choice. Hence, this study is done to find the optimum modelling strategy. Modelling revealed that models built with estimated variables outperformed those built with latent factors. Including qualitative factors along with observed variables and estimated variables showed further improvement. However, the model that includes observed variables, estimated variables, and qualitative factors considering shippers' heterogeneity is the best. It was found that the mode selection behaviour of different latent classes of shippers is distinct. A mode shift from road to rail could be achieved by lowering transportation costs and increasing speed, reliability, and safety for fish transport. Expanding roll on-roll off facilities, dedicated freight corridors, parcel trains, refrigerated containers, and piecemeal service by rail promote a mode shift from road to rail and reduce energy usage.
Źródło:
Archives of Transport; 2022, 64, 4; 7--26
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The spatial heterogeneity of the different types of accommodation with the use of POI data
Autorzy:
Bełej, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2191401.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie SILGIS
Tematy:
tourism
accommodation
point-of-interest
spatial heterogeneity
turystyka
zakwaterowanie
POI
heterogeniczność przestrzenna
Opis:
This study investigates the geographical dimension of tourist accommodation in Slovenia, Croatia, and Bosnia and Herzegovina and attempts to synthesize its spatial structure. The countries were chosen for the study due to their undoubted tourism qualities, their proximity in terms of location and, at the same time, the fundamental diversity of country size, population and access to the sea. The basis of this research was the use of point of interest (POIs), an open-source data, to analyse the spatial heterogeneity of the different types of accommodation. Kernel Density Estimation and Empirical Bayesian Kriging were used in the research.
Źródło:
GIS Odyssey Journal; 2022, 2, 1; 113--127
2720-2682
Pojawia się w:
GIS Odyssey Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 160

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