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Wyszukujesz frazę "marginal" wg kryterium: Temat


Tytuł:
The Politics of Jewish Exclusion in Israel – the Case of Ethiopian Jews
Autorzy:
Pogrebna, Alisa
Powiązania:
https://bibliotekanauki.pl/articles/18765511.pdf
Data publikacji:
2023-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
exclusion
marginal identity
Ethiopian Jews
Israel
Opis:
This paper explores the phenomenon of marginal identities in Israel, focusing on the Ethiopian Jewish community as a representative case study. As a multicultural nation, Israel grapples with the intricacies of integrating diverse ethnic and religious groups into its social fabric. Ethiopian Jews, a small and unique group in the Israeli social landscape, face multifaceted challenges in their quest for acceptance. The research delves into the complexities of identity formation within the Ethiopian Jewish community, considering the interplay of their history of immigration to Israel, unique religious practices, and the process of integration into Israeli society. It is accompanied by comparisons to other aliyot, in particular Mizrahi Jews and post-Soviet Jews. By analyzing the power dynamics that define Ethiopian Israelis’ status within Israel’s imagined community, this paper seeks to unveil the reasons behind their marginalization in the country, in particular focusing on the construction of Israeli national discourse. Ultimately, this paper aims to deepen the understanding of marginal identities in Israel, using the example of Ethiopian Jews to shed light on the broader challenges faced by marginalized communities in diverse societies. The paper offers valuable insights for policymakers, social advocates, and scholars striving to promote inclusivity and social cohesion within multicultural nations.
Źródło:
African Journal of Economics, Politics and Social Studies; 2023, 2(1); 59-67
2956-2686
Pojawia się w:
African Journal of Economics, Politics and Social Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response to Wysocki on indifference
Autorzy:
Block, Walter
Powiązania:
https://bibliotekanauki.pl/articles/2140682.pdf
Data publikacji:
2022-11-08
Wydawca:
Copernicus Center Press
Tematy:
indifference
supply
diminishing marginal utility
praxeology
Opis:
Nozick (1977) was a critique of the view of Austrian economics which rejected the notion of indifference in human action. This author claimed that this stance was incompatible with the notion of the supply of a good, and, also, with diminishing marginal utility, both of which were strongly supported by this praxeological school of thought. Block (1980) was an attempt to rescue the Austrian school from this brilliant intellectual challenge. Hoppe (2005; 2009) rejected Nozick’s challenge, and, also, Block’s (1980) response. Block (2009a) and Block and Barnett (2010), defended Block’s (1980) analysis of indifference. The latest contribution to this ongoing discussion is Wysocki (2021) who maintains that Hoppe was correct in his rejection of Nozick, while Block was not. The present paper is a rejoinder to Wysocki (2021).  
Źródło:
Zagadnienia Filozoficzne w Nauce; 2022, 72; 37-62
0867-8286
2451-0602
Pojawia się w:
Zagadnienia Filozoficzne w Nauce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moralność krańcowa jako przedmiot badania oraz jako wiedza o sposobach osiągania przewagi konkurencyjnej
Marginal Morality (die Grenzen der Moral) as an Ethical Challenge and as Knowledge to Gain a Competitive Advantage
Autorzy:
Rotengruber, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/20311555.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
marginal morality
corporate social responsibility
competitive advantage
Opis:
The aim of this article is to scrutinise the relationship between the moral attitude of an entrepreneur and their possibility to gain a competitive advantage. This declaration leads to the following question: Whether the everyday practice confirms or denies the economic usefulness ofthe postulate of corporate social responsibility. On the one hand, moral desertion is obviously profitable (also in an economic sense). Partners of the deserter, in most cases, are not able to avoid (unexpected and expansive) the consequences of this new attitude towards them. On the other hand, this strategy – in the long run – is unlikely to be profitable. The former victims adjust to their new circumstances and become ready to face the attack. Therefore corporate social responsibility, in the final calculation, should be taken as the only way to protect an active participant of the market against the temptation to neglect his obligation towards people, who can punish or reward him (as stakeholders or whistleblowers).
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2013, 16; 41-50
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Competition in commercial banks in Poland – analysis of Panzar-Rosse H-statistics
Autorzy:
Świtała, Filip
Olszak, Małgorzata
Kowalska, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1203980.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania
Tematy:
competition intensity
marginal costs
contestabily
banking industry
Opis:
This paper aims to find out how intense is the competition in Polish commercial banks loan market. Using Panzar – Rosse H-statistics and applying several estimation techniques (GLS, one-step GMM and two-step GMM) we find that this intensity is sensitive to the estimator applied. Upon analysis of results, one can conclude that competition evolves differently across years in Poland. In some years, competition was relatively high, as the H-statistics reached the level of 0.75, which is relatively close to perfect competition. In other years it gradually decreased reaching its bottom line in 2010, and took upward trend in 2011 and 2012. Generally, the values of our competitive environment measure indicate at monopolistic competition in Poland.
Źródło:
Faculty of Management Working Paper Series; 2013, WPS 4/2013; 1-28
2300-4371
Pojawia się w:
Faculty of Management Working Paper Series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Note on Lenk’s Correction of the Harmonic Mean Estimator
Autorzy:
Pajor, Anna
Osiewalski, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/483355.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Bayesian inference
marginal data density
MCMC methods
Opis:
The paper refines Lenk’s concept of improving the performance of the computed harmonic mean estimator (HME) in three directions. First, the adjusted HME is derived from an exact analytical identity. Second, Lenk’s assumption concerning the appropriate subset A of the parameter space is significantly weakened. Third, it is shown that, under certain restrictions imposed on A, a fundamental identity underlying the HME also holds for improper prior densities, which substantially extends applicability of the adjusted HME.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2013, 5, 4; 271-275
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floral diversity of plant communities in field balks
Autorzy:
Skrajna, Teresa
Bogusz, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2024705.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
marginal habitats
segetal species
agricultural landscape
Polska
Opis:
The aim of the research was to study the floristic richness of balks, i.e. uncultivated strips separating fields, and to research the dependence of plant communities there on habitat conditions and adjacent crops. The share of segetal species in those communities was also analysed. In the western part of the Siedlce Plateau 70 balks among intensively cultivated fields were examined in 2016–2018. The balks divided fields with corn, winter cereals and spring cereal mixtures. The research was conducted with the Braun-Blanquet method, with 110 phytosociological relevés results used as study material. The flora specified this way was analysed in terms of biological structure, forms of life, persistence, historical and geographical spectrum, species rarity and presence of invasive species. In addition, the interdependence between the species richness of balks and habitat conditions as well as the type of neighbouring crops was studied. Habitat conditions were established with the Ellenberg indicator values, based on indicative species and taking into account light, temperature, moisture, soil reaction and nitrogen content. The development and floristic diversity of balk plant communities as ecotone areas were largely influenced by a proximity of arable fields and habitat conditions, especially by soil moisture and the amount of nitrogen. Balk flora consisted of vascular plants with 161 species, mainly apophytes. Those were mostly perennial species, hemikryptophytes. Among the most common field weeds from the class of Stellarietea mediae, 25 species were identified in balks. There were 26 rare and endangered species and 14 species having the status of invasive taxa.
Źródło:
Studia Quaternaria; 2020, 37; 45-50
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Z-ion Zeolite Substrate on Growth of Zea mays L. as Energy Crop Growing on Marginal Soil
Autorzy:
Chomczyńska, Mariola
Zdeb, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/123570.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
marginal soils
energy crops
Z-ion substrate
Opis:
The presented study aimed at determining the influence of the increasing dose of new Z-ion zeolite substrate on the growth of maize (Zea mays L.) as species belonging to energy crops. In order to achieve the study aim, the pot experiment was carried out where the plants were grown on six series of media i.e.: on marginal soil (the control series I), on arable soil (the control series II) and on four mixtures of marginal soil with increasing Z-ion substrate addition (1%, 2%, 5%, 10 % v/v). The pot test was carried out in a phytotron with a 13/11 light/dark regime. After the end of the experiment, the mean values of the vegetative parameters (wet and dry biomass of roots and stems) characterizing the plant growth in particular media series were determined. The C:N ratio for maize stems was calculated as well. The obtained study results showed a favorable influence of Z-ion substrate additions on the vegetative growth of maize. Already a 1% (v/v) substrate addition to marginal soil increased the wet and dry stems biomass by 173–204%. At the same time, it turned out that in the sixth week of plant growth, a 5% substrate addition to the marginal soil enables to achieve the value of vegetation parameters at a level similar to that of the parameters characterizing the plant development on arable land. Thus, at an early stage of plant growth, a 5% substrate dose can be considered as one allowing a similar course of maize growing on marginal soil as in the case of arable soil. It is worth noting that at this substrate dose, the C:N ratio in maize stems reached the value of 13.05, at which the plant biomass is the substrate ensuring the fairly proper course of methane fermentation supplying fuel in the form of biogas.
Źródło:
Journal of Ecological Engineering; 2019, 20, 9; 253-260
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The marginal morality (die Grenzen der Moral) as an ethical challenge and as the knowledge on how to gain competitive advantage
Autorzy:
Rotengruber, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/653125.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
marginal morality
corporate social responsibility
competitive advantage
Opis:
The aim of this article is to scrutinize the relationship between the moral attitude of an entrepreneur and his or her possibility to gain competitive advantage. This declaration leads to the following question: does the everyday practice confirm or deny the economic usefulness of the postulate of corporate social responsibility? On the one hand, moral desertion is obviously profitable (also in the economic sense). Partners of the deserter, in most cases, are not able to avoid (unexpected and expansive) consequences of his or her new attitude towards them. On the other hand, this strategy-in long-term perspective-seems to be doubtfully profitable. The former victims orientate themselves to their new circumstances and become ready to face the attack. Therefore, the corporate social responsibility, in the final calculation, should be taken as the only way to protect active participants of the market against the temptation to neglect their obligation towards people, who can punish or reward them (as stakeholders and whistleblowers).
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2017, 20, 5; 21-31
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intuitionistic fuzzy sets in assessing the marginal value of the elements of a multigraph
Autorzy:
Gładysz, Barbara
Mercik, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1181929.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
communication system
multigraph
intuitionistic set
marginal value
Opis:
The paper presents a method of assessing the value of individual elements of the multigraph, i.e., the value of its vertices and arcs, considering the fuzziness of its parameters. The need to take into account the specificity of the existing types of vertices (including logical functions specified on them) and the possibility of multiple relationships between two neighbouring vertices make it necessary to use a multigraph. The assumed basis for the evaluation of the individual elements of the multigraph was their marginal value, which is the so-called contribution of a given element to the entire multigraph, assuming that the given element affects not only the adjacent elements directly related to it but in a way, perhaps indirect, every other element of the multigraph.
Źródło:
Operations Research and Decisions; 2020, 30, 4; 29-38
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognozowanie i symulacja kryzysów na przykładzie systemów reagujących na zmiany
Forecasting and simulation of crises on the example system responsive to change
Autorzy:
Szkutnik, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/589080.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Antycypacja marginalna
Kryzys
Miara stabilności
System
Zmiany marginalne
Anticipation marginal system
Changes in marginal measure of stability
Crisis
Opis:
Zjawisko kryzysu analizowane było wielokrotnie w literaturze ekonomicznej na podstawie różnych przesłanek. W niniejszym artykule uwaga do tematyki kryzysów skupiona została na podejściu systemowym. Zanalizowano prognozowanie lub antycypację stabilności kryzysów przy marginalnych zmianach parametrów modelu. Wprowadzono swoistą miarę stabilności systemu ze względu na różnorodność stanów w systemie i zmiany w modelu struktury. Wnioski z przeprowadzonych obliczeń potwierdzają zasadność takiego podejścia. Są one zbieżne z wykazywanymi w teoriach ekonomicznych ogólnymi prawidłowościami względem reakcji systemu na zmiany. Zaobserwowano analogie zachowania się systemów gospodarczych oraz finansowych w warunkach kryzysowych i postkryzysowych.
The phenomenon of the crisis was analyzed repeatedly in the economic literature based on different premises. In the article attention to the subject of crises is focused on systems approach. Forecasting or anticipating stability crises are analyzed with marginal changes in the model parameters. Introduced a specific measure of the stability of the system due to the diversity of states in the system and changes in the model structure. Conclusions from the calculations confirm the validity of this approach. They are consistent with those indicated in the economic theories general laws in reaction to changes in the system. Observed parallels the behavior of the system of economic and financial conditions of crisis and post crisis.
Źródło:
Studia Ekonomiczne; 2016, 289; 191-204
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marginal bone loss around dental implants with various types of implant-abutment connection in the same patient
Autorzy:
Szymańska, Jolanta
Szpak, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/972731.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
dental implants
abutment type
marginal bone loss
humans
Opis:
Introduction. One of the criteria of implant therapy success is marginal bone loss. The objective of the study was to assess the correlation between peri-implant marginal bone loss and implant-abutment connection systems used in the same patient, as well as other specific characteristics of implant treatment. The initial research hypothesis assumed that there was no difference in marginal bone loss around implants with different implant-abutment connection systems placed in the same patient. Materials and method. Marginal bone loss was assessed around implants with two different types of implant-abutment connection: with conical (Type I) and with internal hexagonal (Type II) in the same patient. The study included 28 patients aged 37–66 years. Results. Marginal bone loss around Type I implants was 0.112 mm/month before loading with prosthetic restorations, and 0.010 mm/month after loading, while for Type II implants it reached, respectively, 0.123 mm/month and 0.030 mm/month. Marginal bone loss after loading with prosthetic restorations was 11 times lower for Type I implants and 4 times lower for Type II implants. Evaluation of marginal bone loss in the studied patient groups was made on the basis of orthopantomographic radiographs. Conclusions. Implants with conical implant-abutment connection are significantly more favourable to osseointegration than those with internal hexagonal connection. As marginal bone loss is faster before loading implants with prosthetic restorations than after loading, it is advisable to consider early loading if the necessary clinical conditions are met.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2017, 11, 1
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Sentinel-2A to identify the change in dry marginal agricultural land occupation
Autorzy:
Indarto, Indarto
Putra, Bayu T. W.
Mandala, Marga
Powiązania:
https://bibliotekanauki.pl/articles/1844401.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
agricultural
change
land
mapping
marginal
Sentinel-2A
Opis:
Dry marginal agricultural land (DryMAL) potentially use as an alternative resource for crop production. DryMAL defined as land having low natural fertility due to its intrinsic properties and forming environmental factors. This study uses Sentinel-2A imagery to map the spatial extent, compare the result of the classification, and identify the change in DryMAL occupation. The area of study (461.9 km2) is part of Situbondo Regency and is located at the eastern part of East Java, Indonesia. Sentinel-2A image captured in dry-season of 2018 use for this study. Then, supervised image classification using a maximum likelihood algorithm use for image treatment and processing. Furthermore, 450 ground control points for training areas collected during the field surveys. Five bands use in the classification process. The maps produced from the classification process were then compared to the land-use map from the year 2000. The change in DryMAL occupation from 2000 to 2018 was calculated by comparing the classified and land-use map. Supervised classification yielded an overall accuracy of 95.8% and a kappa accuracy of 93.2%. The classification produced six (6) classes of land use: (1) forest, (2) pavement or built-up area, (3) irrigated paddy field, (4) non-irrigated rural area, (5) dry marginal land and (6) water body. Globally, during the last two decades, regional development led by the Regency occupied more DryMAL area for developing plantation. The effort reduces the amount of non-irrigated and converting to the plantation, pavement areas, and irrigated paddy-field.
Źródło:
Journal of Water and Land Development; 2020, 47; 89-95
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantifying the uncertainty in the ultimate recoverable oil reserves using the Monte Carlo simulation techniques from ‘OWA’ Marginal Field, Onshore Niger Delta, Nigeria
Autorzy:
Adeigbe, O. C.
Odedere, I. F.
Amodu, O. I.
Powiązania:
https://bibliotekanauki.pl/articles/184699.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
marginal field
EUR
Monte Carlo
stochastic estimates
reserve
Opis:
A review on the development of marginal oil fields in Nigeria has now become an important strategic issue if it is to remain amongst the top producers in the global market, and these fields are vast, available all over the Niger Delta. One of the factors that makes a field marginal is the size of its reserves. Stochastic estimation gives a certainty in terms of the possible number of outcomes within the range of input parameters. In this work, four (4) deviated wells and 3D seismic volume (362 inlines and 401 traces) were interpreted for the evaluation of the field. The petrophysical evaluations were interpreted using the Power Log software and the Seismic, Geographix and Petrel softwares. Stochastic reserve estimation was done using Monte Carlo sampling techniques and subjected to uncertainty quantification using the Crystal Ball software by varying distributions and measuring sensitivity impact on the overall reserves. The production profile was predicted based on some assumptions and history matching which result in the overall Expected Ultimate Recovery (EUR). The petrophysical analysis shows the reservoirs to be within the unconsolidated continental Benin Formation denoted as ‘Intra-Benin’ sands, an unconventional reservoir as supposed the normal reservoir rocks within the Agbada Formation. This indicated high porosity (0.28), water resistivity (7 Ω∙m), and water saturation and also inferred Heavy Oil (low API). Nine hydrocarbon sands were identified but only three (B1, D and E), representing shallow, mid and deep reservoirs were further evaluated. 1P and 2P reserve estimates were 4.8 MMBO and 5.7 MMBO for B1; 15.2 MMMscf and 16.4 MMMscf for D; 8.4 MMMscf and 8.8 MMMscf for E respectively. The Monte Carlo simulation of 1,000,000 trials with mainly triangular distribution assumption generated P10, P50, P90 were 6.5 MMBO, 5.6 MMBO and 4.4 MMBO for B1; 17.5 MMMscf, 13.7 MMMscf and 10.8 MMMscf for D; 10.4 MMMscf, 8 MMMscf and 6.1 MMMscf for E respectively. The sensitivity impact of the input parameters were estimated and ranked, and the coefficient of variability ranges within 15% to 20% for the reservoirs indicating that there is a very low level uncertainty of reserve estimation around the P10, P50 and P90 percentiles which could be positive for investment decisions. ‘OWA’ marginal field reflects a typical low reserve (EUR) category found within the Niger Delta basin.
Źródło:
Geology, Geophysics and Environment; 2018, 44, 4; 401-412
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of complexity on the marginal logistical costs
Wpływ złożoności na marginalne koszty logistyczne
Autorzy:
Dubovec, J.
Powiązania:
https://bibliotekanauki.pl/articles/374809.pdf
Data publikacji:
2013
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
logistics
complexity
marginal costs
logistyka
złożoność
koszty krańcowe
Opis:
In the article is described the influence of complexity on the logistical operations. Ideal example is the exchange of storage in the system "kanban", which has complexity equal one. Clients directed production increases the consumption of time in logistics within manipulation with critical parts, when the ratio isn't equal to multiple capacity relevant storage. Economical consequence is the increase of costs.
W artykule opisano wpływ złożoności na działania logistyczne. Idealnym przykładem jest wymiana pamięci w systemie „kanban”, który ma złożoność równą jeden. Centralnie skierowana produkcja zwiększa zużycie czasu w logistyce w ramach manipulacji ważnych elementów, kiedy rotacja nie jest równa wielorakości zdolności właściwego przechowywania. Ekonomiczną konsekwencją jest wzrost kosztów.
Źródło:
Transport Problems; 2013, 8, 4; 115-119
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE EFFECT OF RETIREMENT ON PERCEIVED WELL-BEING IN HUNGARY
Autorzy:
Radó, Márta
Powiązania:
https://bibliotekanauki.pl/articles/646765.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
retirement
marginal log-linear models
perceived well-being
Opis:
The effect of retirement on perceived well-being is examined by using three waves of the Hungarian GGS data. The marginal log-linear model, which is a useful, state-of-the art methodological tool for categorical multivariate analysis, is applied to the problem. This paper ascertains that retirement has a significantly negative effect on an individual’s perceived well-being, although after three years of retirement the feeling of well-being starts to increase again. The significant decrease after retirement can be explained by the health and age of the individual, since those in living poor health and retiring at a younger age tend to have lower subjective well-being. Thus retirement and subjective well-being are conditionally independent given health and age. This paper also reveals that the perceived well-being of those who have retired between the first and the second wave is a Markov chain. This means that the perceived well-being measured in the third and the first waves are conditionally independent given the well-being measured in the second wave. The results support the idea that retirement causes a temporary reduction in well-being.
Źródło:
Studia Humanistyczne AGH; 2014, 13, 4
2084-3364
Pojawia się w:
Studia Humanistyczne AGH
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marginal mandibular nerve injury during neck dissection of level IIa, and the influence of different types of dissection: diathermy versus cold knife
Autorzy:
Chiesa Estomba, Carlos
Sistiaga Suárez, Jon
González-García, Jose
Larruscain-Sarasola, Ekhiñe
Thomas Arrizabalaga, Izaskun
Altuna Mariezcurrena, Xabier
Powiązania:
https://bibliotekanauki.pl/articles/1398290.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
Neck
Dissection
Marginal Mandibular Nerve
Diathermy
Cold Knife.
Opis:
Introduction: Postoperative injury of the marginal mandibular branch of the facial nerve is considered a complication in neck dissection and can be related to different factors including traction, devascularisation or conduction block due to diathermy. Material and Methods: A prospective, crossover study including patients treated via bilateral selective neck dissection level IIa during a 12-month period, was performed to evaluate efficacy of the Hayes-Martin manoeuvre to prevent nerve injury during use of cold or monopolar diathermy dissection. Results: 20 patients met the inclusion criteria (40 neck dissections). Just one case of right temporal MMN weakness in the postoperative period was observed (1/40 = 2.5%). There were no cases of permanent marginal mandibular nerve weakness when using the Hayes-Martin manoeuvre. Conclusion: he Hayes-Martin manoeuvre is a safe method to preserve MMN during neck dissection level IIa, regardless of the type of dissection.
Źródło:
Polish Journal of Otolaryngology; 2018, 72, 4; 21-25
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the molecular cytogenetic, morphometric and biochemical parameters of Deschampsia antarctica from its southern range limit in maritime Antarctic
Autorzy:
Navrotska, Daria
Andreev, Igor
Betekhtin, Alexander
Rojek, Magdalena
Parnikoza, Ivan
Myryuta, Ganna
Poronnik, Oksana
Miryuta, Natalia
Szymanowska-Pułka, Joanna
Grakhov, Volodymyr
Ivannikov, Roman
Hasterok, Robert
Kunakh, Viktor
Powiązania:
https://bibliotekanauki.pl/articles/2041909.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
Deschampsia antarctica
marginal populations
variation
phenotypic characteristics
Źródło:
Polish Polar Research; 2018, 39, 4; 525-548
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Groundwater quality changes due to iron sulphide oxidation in the Odra ice marginal valley – long-term process observations
Autorzy:
Górski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2062995.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
iron sulphide oxidation
ice-marginal valley
groundwater quality
Opis:
In the year 1966 a well field supplying the city of Zielona Góra with water was opened in the ice-marginal valley of the Odra River, near the village of Zawada. After three years of water pumping from 22 wells tapping the shallow valley aquifer, a significant deterioration of water quality, especially involving the increase of concentrations of iron, sulphates, manganese and water hardness, as a result of the process of sulphide oxidation accumulated within the recent Holocene deposits, was observed. Despite drastic changes in quality (the increase of iron concentration to approximately 30 mg/l and sulphate concentration to above 300 mg/l), the well field was still operated as its water was used for purifying (coagulation) of the polluted surface water supplying the city of Zielona Góra. Based on the analysis of over 30-year-long period of water pumping, it was stated that the effect of the sulphide oxidation process on the quality of water was noticeable for the period of 19 years. The period of persisting very high concentrations of iron of above 15 mg/l amounted to approximately 6 years. It was also stated that the process of reducing the concentrations following the period of their maximum increase proceeded in two stages – the stage of rapid reduction of concentrations which lasted for about 4 years and the stage of slow changes which took about 10 years. The first one was related to the exhaustion of sulphides within the formations marked by good permeability, and the period of semi-decomposition of sulphides, which lasted for about 3 years, was determined based on the changes in iron concentrations. On the other hand, the reduction of concentrations at the stage of slow changes may be linked to the oxidation of sulphides occurring in the formations marked by weak permeability (silts, clays, peats).
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 441 Hydrogeologia z. 10; 19--25
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rational taxation in an open access fishery model
Autorzy:
Rokhlin, D. B.
Usov, A.
Powiązania:
https://bibliotekanauki.pl/articles/229509.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
marginal value function
stimulating taxes
myopic agents
optimal control
Opis:
We consider a model of fishery management, where n agents exploit a single population with strictly concave continuously differentiable growth function of Verhulst type. If the agent actions are coordinated and directed towards the maximization of the discounted cooperative revenue, then the biomass stabilizes at the level, defined by the well known “golden rule”. We show that for independent myopic harvesting agents such optimal (or ε-optimal) cooperative behavior can be stimulated by the proportional tax, depending on the resource stock, and equal to the marginal value function of the cooperative problem. To implement this taxation scheme we prove that the mentioned value function is strictly concave and continuously differentiable, although the instantaneous individual revenues may be neither concave nor differentiable.
Źródło:
Archives of Control Sciences; 2017, 27, 1; 5-27
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Divergent Priors and Well Behaved Bayes Factors
Autorzy:
Strachan, Rodney W.
van Dijk, Herman K.
Powiązania:
https://bibliotekanauki.pl/articles/483279.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
improper prior
Bayes factor
marginal likelihood
shrinkage prior
measure
Opis:
Bartlett’s paradox has been taken to imply that using improper priors results in Bayes factors that are not well defined, preventing model comparison in this case. We use well understood principles underlying what is already common practice, to demonstrate that this implication is not true for some improper priors, such as the Shrinkage prior due to Stein (1956). While this result would appear to expand the class of priors that may be used for computing posterior odds, we warn against the straightforward use of these priors. Highlighting the role of the prior measure in the behaviour of Bayes factors, we demonstrate pathologies in the prior measures for these improper priors. Using this discussion, we then propose a method of employing such priors by setting rules on the rate of diffusion of prior certainty.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2014, 1; 1-31
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trends in Quinoa Adoption in Marginal Areas
Autorzy:
Ahmadzai, Hayatullah
Powiązania:
https://bibliotekanauki.pl/articles/1892042.pdf
Data publikacji:
2020-11-08
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:
quinoa production
trends in adoption
economic viability
marginal environments
Opis:
Global demand for quinoa has substantially grown seemingly due to the rich nutritional ingredients in quinoa grain and its resilience to unfavorable and harsh biotical stresses and environmental factors prevalent in marginal environments. Research evidence suggest that global quinoa production as well as the number of quinoa-producing countries have been substantially increased throughout the last few years. With intensive research trails and tests underway in new countries across the world, especially in the Middle East and North Africa (MENA) region, researchers and policymakers are determined to upscale its commercial production. However, little is known about its economic viability to substantiate the adoption and ultimately the sustainability of quinoa production. The economic analysis carried out in this study suggests that quinoa can be highly profitable, but its economic viability largely depends on the availability of high-yielding verities, best management practices through demand-driven extension services, and reliable market information on local demand and prices. Under the most-likely production scenario, estimated net profit can reach up to AED 6,059 ($1,651) per hectare. Given the lack of quality data, the estimated net gains are simulated to assess the level of sensitivity due to potential uncertainties and volatility in key variables and assumptions. After 10,000 iterations, the results from Monte Carlo simulation reveals that the average value of simulated net gains is about AED 8,265 per hectare with no significant chances of negative profits.
Źródło:
Journal of Agribusiness and Rural Development; 2020, 57, 3; 235-247
1899-5241
Pojawia się w:
Journal of Agribusiness and Rural Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
I Love NH. The Marginal Gentrification of an Ideal Socialist City of Nowa Huta
Autorzy:
Gądecki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/27311617.pdf
Data publikacji:
2012-12-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
Nowa Huta
urban transformation
marginal gentrification
life satisfaction
social relations
Opis:
This paper presents the chosen and initial issues relating to the potential of the historical gentrification in Nowa Huta – the part of Krakow that was erected as a new, perfect town of socialism in the 50s. In order to investigate the gentrification potential of this area, I take into account the important subject of urban changes present in the Polish conditions. In fact, I do it from a different perspective and in a different moment; I observe the gentrification process through the eyes of the new citizens and in its introductory phase.
Źródło:
Kultura i Edukacja; 2012, 6(92); 165-182
1230-266X
Pojawia się w:
Kultura i Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MPC out of Augmented Wealth in Poland
Autorzy:
Jabłonowski, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2075333.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
marginal propensity to consume
crowding out private savings
augmented wealth
Opis:
The study attempts to link the descriptive economics with the theoretical model of permanent income and life cycle hypothesis (PILCH) to shed some light on a low private savings rate for Polish households. These may be explained by the households’ belief that the public pension are a collateral to borrow against, which could discourage the buffer stock effect. The study comprises two research fields: 1) the estimation of so called augmented wealth, and, 2) the marginal propensity to consume (MPC) out of different types of wealth with the permanent income model. The mean augmented wealth (i.e. net wealth plus public pension wealth) per household in PLN amounted to 705 thousands, consisting of public pension wealth of 388 thousands and net wealth of 415 thousands. The model perfectly matches the augmented wealth Lorenz curve. The average MPC out of all types of wealth reaches 10% on average, ranging 6–20%, with a negative MPC to wealth correlation, and 60% of hand-to-mouth households. The explanation for this perfect match may stem from a high wage growth (also public pension contributions wedge) that that builds the public pension wealth. The Ricardian-type households may then mentally account the future pensions as a collateral (fiduciary money) for current high MPC, which may implicate crowding out their propensity to save for retirement privately
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2021, 3; 253-286
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Znaczenie wysp środowiskowych w ochronie szaty roślinnej gminy Uniejów
Autorzy:
Kucharski, Leszek
Chmielecki, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/2034177.pdf
Data publikacji:
2021-11-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
flora
roślinność
siedliska marginalne
ochrona
Uniejów
vegetation
marginal habitats
conservation
Opis:
W rolniczym krajobrazie ważną funkcję pełnią powierzchnie wyłączone z użytkowania, czyli siedliska marginalne (wyspy środowiskowe). Są to zarówno obiekty linearne: miedze, śródpolne skarpy, brzegi cieków i lasów, pobocza dróg i polne drogi, jak i wyspy ekologiczne: oczka śródpolne, małe torfowiska, niewielkie zadrzewienia, ekstensywnie użytkowane łąki i murawy. Obiekty te charakteryzują się znacznie większą różnorodnością biologiczną niż otaczające je pola lub intensywnie użytkowane łąki. Można je uznać za ostoje roślin i zwierząt. Florę gminy Uniejów tworzą 623 rodzime i trwale zadomowione gatunki roślin naczyniowych. Na siedliskach wyłączonych z użytkowania stwierdzono 319 gatunków. Najbogatszymi florystycznie obiektami są pobocza dróg, które zasiedla 128 gatunków, a najuboższymi – niewielkie płaty ciepłolubnych muraw z 75 taksonami. Najwyższy wskaźnik naturalności (64,4%) cechuje florę małych mokradeł, a najniższy – flory miedz śródpolnych i poboczy dróg. Wyspy środowiskowe mogą być chronione w formie użytków ekologicznych oraz w ramach systemu rekompensat finansowych, zachęcających rolników do ich utrzymywania w zakresie programów rolnośrodowiskowych.
Marginal habitats (ecological islands), i.e. areas of land isolated by natural or artificial means from the surrounding land and not in agricultural use, fulfil an important function in agricultural landscape. They include linear objects, such as balks, boundary strips, paths and side spaces, forest edges, or river and stream banks, as well as non-linear objects, such as small peatbogs, clumps of trees, or extensively used meadows. Such objects are characterized by much greater biological diversity than the surrounding fields or intensively used meadows. They can be regarded as refuge for plants and animals. Marginal habitats can be protected in the form of ecological grounds or under the system of financial compensations, providing incentives for farmers to maintain them.
Źródło:
Biuletyn Uniejowski; 2021, 10; 149-179
2299-8403
Pojawia się w:
Biuletyn Uniejowski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi o wpływie struktury przedpola na formowanie się frontu nasunięć płaszczowinowych
Some remarks on the influence of the foreland structure on the formation of a frontal nappe thrust
Autorzy:
Stupka, O.
Mizerski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2074542.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
geotektoniczny
orogen
zapadlisko brzegowe
jednostki kratoniczne
geotectonics
marginal foredeep
craton
Opis:
In this paper we describe relations between geological structure, shape and relief of the crystalline basement of the Precambrian cratons, and between rigid elements in Variscan orogens and the width of the younger fold belts in their foreland. The relations can be seen between the Baltic shield and Alpine belts. In places, where the fold belt is thrust over uplifted part of the craton's fundament, the fold belt and its marginal foredeep are tight and the fold belt is very high. In places, where the fold belt is thrust over deep part of the fundament, the fold belt and its marginal foredeep are broad. Similar relations can be seen between the East European craton and Variscan fold belts.
Źródło:
Przegląd Geologiczny; 2007, 55, 5; 430-434
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marginal cost of industrial production
Marginalny koszt produkcji przemysłowej
Autorzy:
Man, M.
Modrak, V.
Grabara, J. K.
Powiązania:
https://bibliotekanauki.pl/articles/406200.pdf
Data publikacji:
2011
Wydawca:
Politechnika Częstochowska
Tematy:
koszt krańcowy
produkcja
wielkość produkcji
marginal cost
production
product volume
Opis:
One of the important issues of production management is the most efficient possible use of the production capacity as the global level of the production fixed expenses depends on the unit's production capacity and their level per product unit diminishes as the degree of employment of such a capacity tends to be optimum. Accordingly, to a certain volume of achieved production one may add or subtract, under certain circumstances, a certain volume (lot, stratum, and margin) of products; at the same time, the increase or the decrease of production volume determines the change of the total production costs of the unit. As the level of the total costs corresponding to the production that is going to be achieved until the adoption of the decision of increasing or decreasing production level already exists, and the sum total production costs are modified with is determined by the added or subtracted production volume (stratum, lot, and margin).
Jednym z ważnych zagadnień zarządzania produkcją jest jak najbardziej efektywne wykorzystanie mocy produkcyjnych jako globalnego poziomu dostosowanych wydatków produkcyjnych zależnych od mocy produkcyjnej jednostki a ich poziomu według zmniejszenia jednostki produkcji jako stopnia zatrudnienia jaki wydaje się być optymalny. W związku z powyższym, do pewnej wielkości osiągniętej przez produkcję może dodać lub odjąć, w pewnych okolicznościach, określonej wielkości (partii, warstwy, lub marży) produktów, w tym samym czasie, wzrost lub spadek wielkości produkcji określa zmiany całkowitych kosztów produkcji jednostki. Ponieważ poziom całkowitych kosztów odpowiadającej produkcji, który ma zostać osiągnięty do dnia przyjęcia decyzji zwiększenie lub zmniejszenie poziomu produkcji już istnieje, a sumy kosztów produkcji są modyfikowane co ustalane jest przez dodanie lub odjęcie wielkości produkcji (warstwy, partii, a marży).
Źródło:
Polish Journal of Management Studies; 2011, 3; 61-68
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth Law for Columnar Structure within the Copper and Copper Alloys Solidifying at a High Peclet Number
Autorzy:
Kwapisiński, Piotr
Wołczyński, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/27765081.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
continuously cast copper ingots
perturbation wavelength
criterion of marginal stability
Opis:
The copper and copper alloys’ ingots have been subjected to structural observation in order to estimate the Peclet Number at which these ingots were solidifying. It was stated that the formation of columnar structure within the ingots occurred at a high Peclet Number, higher than the threshold value of this parameter, Pe = 500. The formulated relationships of the Growth Law correspond to a high Peclet Number due to application of the adequate development in series of the Ivantsov’s function. The Growth Law has been developed on the basis of the definition of the wavelength of perturbation which leads to the dispersion of the planar s/l interface. New definition of the index of stability connected with the behavior of solute concentration at the s/l interface has been delivered. The current definition is related to non-equilibrium solidification. The index can be easily calculated using some parameters delivered by a given Cu-X phase diagram. Physical meaning of the formulated Growth Law has also been presented.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 579--584
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ice-sheet dynamics of warta glaciation (saale) in the marginal zone of Knyszewicze area, north eastern Poland
Autorzy:
Rychel, Joanna
Woronko, Barbara
Karasiewicz, Mirosław T.
Szymczuk, Paweł
Morawski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2025794.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ice lobe
marginal zone
glaciotectonic disturbances
thrust-block push moraines
morpholineaments
Opis:
The pa per pres ents a re search on a mar ginal zone near Knyszewicze in the south ern part of Sokó³ka Hills (north east ern Po land). Ter mi nal mo raine hills are ar ranged amphitheatrically in a lobal pat tern. Dy nam ics of the Knyszewicze frontal ice-sheet lobe dur ing the Saale Gla ci ation and suc ces sive stages of the mar ginal zone near the vil lage of Knyszewicze were re con structed based on sed i men tary and geomorphological anal y sis, us ing a dig i tal el e va tion model and morpholineaments. Three main phases of the Knyszewicze gla cial-lobe ac tiv ity were iden ti fied in clud ing ac cu mu la - tion of glaciofluvial de pos its, ad vances of the ice mar gin and ice-lobe re treat. Mo raine hills de vel oped at a sta ble ice-lobe ter mi nus, ini tially as short end-mo raine fans with the fol low ing se quence of lithofacies GhÞSGhÞSh or GmÞGhÞSh. Such a se quence in di cates cy clic sheet-floods. Dur ing a small but dy namic ad vance of the ice sheet termi nus, these de pos its were moved for ward and monoclinally folded, then fur rowed with slop ing faults due to hor i zontal pres sure. Typ i cal thrust-block push mo raines de vel oped in this way. Ice sheet ad vance took place when per ma frost was pres ent in the sub stra tum and very high wa ter pres sure oc curred at gla cial ter mi nus. In side a lobal con fig u ra tion of mo raines, there is a rich in ven tory of gla cial forms with a clas sic ter mi nal de pres sion in the cen tral part. Based on this landform pat tern, their shape, rhythm and glaciotectonic dis tur bances, the land re lief may be re ferred to as a hill-hole pair. The struc ture of Horczaki Knoll, de pos ited on the sub-Qua ter nary tec tonic struc ture, sig nif i cantly con trib uted to a de vel op ment of this mar ginal zone.
Źródło:
Studia Quaternaria; 2015, 32; 79-90
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of sedimentological composition on OSL dating of glaciofluvial deposits : examples from Estonia
Autorzy:
Raukas, A.
Stankowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2059710.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Pleistocene chronostratigraphy
deglaciation history
ice marginal formations
glaciofluvial deposits
luminescence dating
Opis:
We assess the suitability of luminescence (TL and OSL) dating techniques for establishing a precise Late Pleistocene chronology for the northern Baltic area, and show on the basis of the fine sand/coarse silt fraction of subaqueous deposits, how sedimentological composition influences the dates obtained. Turbidity, loading by fine suspended material, water depth, velocity of outwash streams and transport length, and also perhaps rapid night-time sedimentation and incorporation of older, unbleached particles are factors that variably influence the extent of bleaching of the luminescence signal, and thus, cause variability of dates obtained. Alongside reliable dates for "late-glacial" deposits between 11 000-15 000 OSL years BP, many entirely unreliable dates from 8 000 ±300 to 114 000 ±8 000 OSL years BP have been obtained. This means that the age determination of glaciofluvial deposits is extremely difficult in practice. This applies particularly to intermorainic sediments, the exact genesis of which is unknown. The paper is addressed to the investigators wishing to use luminescence dating techniques to establishing the Pleistocene chronostratigraphy of glaciofluvial deposits.
Źródło:
Geological Quarterly; 2005, 49, 4; 463--470
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sand sheets interaction with aeolian dune, alluvial and marginal playa beds in Late Permian Upper Rotliegend setting (western part of the Poznań Basin, Poland)
Autorzy:
Kiersnowski, H.
Buniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060530.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Upper Rotliegend
sand sheet
marginal playa
Poznań Basin
Polska
Late Permian climate
Opis:
The Upper Rotliegend deposits of the western part of the Poznań Basin, Poland, represent three main sedimentary environments: aeolian desert (dunes and sand sheets), alluvial plain (alluvial covers with wadi deposits) and marginal playa. In arid periods, dunes prograded into areas dominated by alluvial sedimentation. During wet periods, alluvial deposits eroded the aeolian deposits and prograded onto dune fields. Playa sediments were deposited among aeolian or alluvial sediments during periodic expansions of the playa. These aeolian, alluvial and playa deposits are arranged in depositional sequences. Boundaries between sequences are marked by rapid changes in depositional facies; and by erosional bounding surfaces. Maximum Wetting Surfaces have been distinguished within some parts of the depositional sequences, which enable regional correlations. The sections studied are composed of thick sequences of sand and sand-gravel sheets. The sand sheets represent periods of stratigraphic condensation. Systems of sand sheets are typical of marginal areas of ergs. We distinguish nine depositional complexes (units) numbered 1-9 from base to top, respectively. These subdivisions are based on the interpretation of the sedimentological record in palaeoclimatic terms, and in terms of major erosional boundaries, which are probably of regional extent. In the aeolian deposits, major boundaries are associated with deflation surfaces related to the stabilization of groundwater levels. In the marginal playa deposits, the most important boundaries are correlated to transgressive surfaces that developed during playa expansion. Time gaps represented by the boundaries and the scale of erosion below them, are difficult to estimate. The depositional system of the Upper Rotliegend was dominated by sand and sand-gravel sheets, and is either a unique feature in the entire Southern Permian Basin or, as we assume, sand sheets occur more com monly in the Rotliegend than has been previously thought.
Źródło:
Geological Quarterly; 2016, 60, 4; 771--800
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adam Smith and the Austrian School of Economics: The Problem of Diamonds and Water
Autorzy:
Poier, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/518262.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Gdański. Wydział Ekonomiczny
Tematy:
Adam Smith
Austrian School of Economics
Value Paradox
Marginal Utility
Decision Making
Opis:
Everyday consumers have to face the question if the value of a good is really worth its price. When in 2017 Leonardo da Vinci's painting "Salvator Mundi" was auctioned off for over $450 million, it nearly could have compensated for the state deficit of Lithuania. Is there a rational justification? In economic history we have an interplay of competing theories – often with contemporary trends as a counter-movement to established theories. While Adam Smith was not able to solve the value paradox, his – especially Austrian – successors developed theories of marginal utility and put the individual back in focus.
Konsumenci zadają sobie często pytanie, czy wartość danego dobra rzeczywiście odpowiada jego cenie. Kiedy w 2017 r. obraz Leonarda da Vinci „Salvator Mundi” został sprzedany na aukcji za ponad $450 mln, kwotę tę porównano do wielkości deficytu budżetowego Litwy. Czy istnieje jakaś racjonalna metoda oceny wartości dóbr? W historii ekonomii występują konkurujące ze sobą teorie, podporządkowane aktualnym trendom jako przeciwwagą dla już znanych teorii. Podczas gdy Adam Smith nie był w stanie uzasadnić paradoksu wartości, jego – zwłaszcza austriaccy – następcy rozwinęli teorię użyteczności krańcowej i uzupełnili tę problematykę o własne odkrycia.
Źródło:
Zeszyty Studenckie Wydziału Ekonomicznego „Nasze Studia”; 2019, 9; 162-173
1731-6707
Pojawia się w:
Zeszyty Studenckie Wydziału Ekonomicznego „Nasze Studia”
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efektywność produkcji żywca wieprzowego – studium przypadku
The efficiency of pork production – case study
Autorzy:
Czech, Łukasz
Kołoszko-Chomentowska, Zofia
Powiązania:
https://bibliotekanauki.pl/articles/2049689.pdf
Data publikacji:
2018-12-27
Wydawca:
Centrum Doradztwa Rolniczego w Brwinowie. Oddział w Poznaniu
Tematy:
efektywność
koszt marginalny
rentowność
żywiec wieprzowy
efficiency
marginal cost
profitability
pork production
Opis:
W pracy dokonano oceny opłacalności produkcji żywca wieprzowego na przykładzie celowo dobranego gospodarstwa rodzinnego specjalizującego się w chowie trzody chlewnej. Przeprowadzona analiza wskazuje, że istotnymi czynnikami decydującymi o efektywności produkcji są ceny skupu żywca i ceny pasz. Badane gospodarstwo przyjęło strategię minimalizowania kosztów produkcji i mimo niekorzystnej koniunktury na rynku uzyskało nadwyżkę bezpośrednią. W warunkach cenowych 2018 roku wartość nadwyżki zmniejszyła się i była zależna głównie od ceny skupu żywca. Kalkulacja opłacalności realizacji inwestycji wskazuje, że okres zwrotu nakładów inwestycyjnych jest zależny od warunków rynkowych i wynosi od 10 do 14 lat. Oczekiwana wewnętrzna stopa zwrotu wynosi 12,7%.
This paper gives an assessment of the profitability of swine slaughter animal production using the example of a purposefully chosen family-owned holding specializing in swine breeding. Conducted analysis indicates that prices of livestock purchase and of feeds are decisive factors in production efficiency. The studied farm adopted the strategy of minimizing production costs and achieved a standard gross margin despite unfavorable market conditions. Under the price conditions in 2018, the value of the margin decreased and was mainly dependent on the price of livestock purchase. A calculation of investment profitability indicates that the payback period is dependent on market conditions, ranging from 10 to 14 years. The expected internal rate of return is 12.7%.
Źródło:
Zagadnienia Doradztwa Rolniczego; 2018, 94, 4; 18-30
1232-3578
2719-8901
Pojawia się w:
Zagadnienia Doradztwa Rolniczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The early stages in the evolution of Economic Man. Millian and marginal approaches
Autorzy:
Dzionek-Kozłowska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/652769.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
homo economicus
Economic Man
rationality
marginal economics
John Stuart Mill
Alfred Marshall
Opis:
The homo economicus (Economic Man) concept is one of the best-known components of economic theorising frequently recognised as a part of the “hard core” of the mainstream 20th-century economics. This model gained such a high status in times of the marginal revolution, although it was coined in the 1830s by the classical economist John S. Mill. Nowadays, homo economicus is commonly perceived as a model of rational economic agent maximising utility or preferences. The article aims to show that both the Millian approach and the marginal approach were more complex than the contemporary incarnation of Economic Man. One of the key differences between the early stages in the evolution of homo oeconomicus and the modern version of it refers to the notion of rationality. Whereas it is the constitutive element of the 20th-century homo oeconomicus, the requirement of full rationality was never explicitly articulated by Mill and marginal economists. Therefore, at the early stages of its evolution, the homo economicus model would have been much more resistant to the objections formulated against it by the 20th-century critics.
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2017, 20, 6; 33-51
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ skali produkcji na opłacalność eksportu węgla kamiennego
Scale economies and efficiency of coal export
Autorzy:
Suwała, W.
Kudełko, M.
Powiązania:
https://bibliotekanauki.pl/articles/394548.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
ekonomika górnictwa
koszty krańcowe
rachunek ekonomiczny
mining economics
marginal costs
economic assessment
Opis:
Artykuł podejmuje problem wpływu skali produkcji na efektywność eksportu węgla i zwiększania poziomu produkcji. Z efektem skali powiązano postacie funkcji kosztów, stanowiąc formalną podstawę do ich estymowania na podstawie danych kopalń. Oszacowano funkcje liniowe, jako że postać wielomianu trzeciego stopnia, wskazywania w teorii mikroekonomii, nie jest możliwa do oszacowania z powodu braku danych o silnie zróżnicowanym poziomie produkcji. W celu estymacji równań kosztów dla poszczególnych kopalń posłużono się danymi historycznymi z lat 1991-1994, co było podyktowane dostępnością odpowiedniego materiału statystycznego. Uzyskane parametry funkcji posłużyły do oszacowania kosztu krańcowego. Jego porównanie z cenami jest podstawą do dyskusji o zakresie opłacalności eksportu węgla i zwiększania poziomu produkcji.
The paper discusses the problem of economies of scale in Polish coal mining. Forms of scale economies and respective costs functions were described as a base for the form of costs' function. Four years data were used to estimate linear costs models. In microeconomics analyses third level polynomial functions is a typical for the costs function, but lack of data for large differences in production level makes estimation impossible. Linear function gave estimate of fixed marginal costs. Relevance of their levels compared to coal export prices is discussed as a criteria for export efficiency.
Źródło:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2010, 77; 35-45
2080-0819
Pojawia się w:
Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological and genetic aspects of distribution of the marginal populations of Swiss stone pine (Pinus cembra L.) in Ukrainian Carpathians
Autorzy:
Mohytych, Vasyl
Klisz, Marcin
Yatsyk, Roman
Hayda, Yuriy
Sishchuk, Mariana
Powiązania:
https://bibliotekanauki.pl/articles/2042495.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
Swiss stone pine
Eastern Carpathian mountains
habitats fragmentation
gene conservation
marginal population
Opis:
Current distributions of Swiss stone pine mostly cover the mountain regions of Europe (Alps and Carpathians). Easternmost distribution of this species is located in western Ukraine. Due to environmental fragmentation in Eastern Carpathians and competition with Norway spruce and other species, marginal populations of Swiss stone pine create isolated island, where other species are not able to cope with harsh conditions. Still, Pinus cembra L. play an important role for soil-formation and soil-protection in high elevations. The evidence of recent reduction in the area of Swiss stone pine raises the question whether the introduction of this species at lower altitudes can be successful? According to the studies conducted on reciprocal transplant experiments, Swiss stone pine population from higher elevation are able to profit in low elevation sites. Thus, parallelly with gene conservation activity, the possibilities of assisted migration should be recognized for this species.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 3; 242-246
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depositional environment of the glacigenic deposits from the Holy Cross Mountains (Poland) – interpretation based on macro- and microstructure analyses
Autorzy:
Ludwikowska-Kędzia, M.
Pawelec, H.
Powiązania:
https://bibliotekanauki.pl/articles/2060464.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
glacigenic deposits
ice-marginal environment
macrostructure
microstructures
Pleistocene
Holy Cross Mountains
Polska
Opis:
In this paper an attempt is made to identify the depositional environment of glacigenic deposits from the central part of the Holy Cross Mountains (Kielce-Łagów Valley). In this area, the primary glacial relief is very poorly visible, mainly due to its modification by subsequent denudation processes. The study is based on detailed sedimentological (macro- and microstructural) analysis of the deposits. The bottom part of the deposits consists of gravelly and sandy facies. They are overlain by diamicton facies, with a small proportion of sandy facies. Clayey/silty facies occur in minor quantities. The investigations indicate that these deposits represent an ice-marginal environment. Local stagnation of the ice sheet lobe was controlled by the geological structure of bedrock (karstified and faulted limestones) and the features of a fossil valley. The ice-marginal depositional environment is indicated by the predominance of sediment-gravity flow deposits, a low proportion of sorted deposits, as well as the interfingering/alternating of mass flow deposits and waterlain deposits. Deformation occurring in the deposits is of gravitational origin. They also show traces of periglacial processes. The deposits constituted an ice-marginal moraine (dry end moraine with limited topographic expression). Micromorphological analyses provided data for genetic identification of the deposits, and allowed the inference about rheology of deposition and deformation processes. However, in some cases, they did not allow unequivocal genetic classification of the deposits. The results of presented investigations confirm the opinion that detailed and complete explanation of deposit origin requires both micromorphological analyses and macroscopic field sedimentological and structural studies.
Źródło:
Geological Quarterly; 2014, 58, 4; 807--826
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Record of glacial outburst floods in marginal zones and forelands of Scandinavian glaciations in Poland
Zapis powodzi glacjalnych w strefach brzeżnych i na przedpolach lądolodów skandynawskich w Polsce
Autorzy:
Rdzany, Zbigniew
Frydrych, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/765198.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
powódź glacjalna
jökulhlaupy
przepływ wysokoenergetyczny
przepływ subglacjalny
strefa marginalna
zlodowacenia skandynawskie
pradoliny
Glacial outburst flood
jökulhlaups
high energy flow
marginal zone
subglacial flow
Scandinavian glaciations
ice-marginal valleys
Opis:
W literaturze światowej poświęcono wiele uwagi ewidencji sedymentologicznej i morfologicznej ekstremalnych zdarzeń powodziowych zarówno na przedpolu lodowców i lądolodów współczesnych, jak i plejstoceńskich. Doniesienia na ten temat pochodzą z obszarów i okresów różnych zlodowaceń. W Polsce takie zdarzenia zostały udokumentowane w kilkunastu pracach. Sytuacja ta skłania do ustalenia, czy na obszarze Polski miała miejsce większa częstotliwość i powszechność występowania tych zdarzeń ekstremalnych niż do tej pory sądzono. W artykule dokonano przeglądu dotychczasowych badań w zasięgu lądolodów plejstoceńskich w Polsce, które uwzględniają występowanie wysokoenergetycznych powodzi glacjalnych w interpretacji osadów lub form rzeźby. Jego celem jest określenie obecnego stanu wiedzy i wskazanie kierunków dalszych badań. Przegląd ten uzupełniono o studium warunków paleogeograficznych udokumentowanego wcześniej sedymentologicznie jökulhlaupu w Siedlątkowie na krawędzi Wysoczyzny Łaskiej. Dokonana analiza prac i przeprowadzone zestawienia prowadzą do wniosku, że stan wiedzy na temat wielkich powodzi glacjalnych na Niżu Polskim nie jest zadowalający. Wskazuje to na potrzebę podjęcia intensywnych badań nad zapisem tego typu zdarzeń i ich rekonstrukcją, ponieważ ich rola morfogenetyczna, np. w kształtowaniu pradolin i innych elementów krajobrazu glacigenicznego jest niedoceniona.
In international literature, much attention has been paid to sedimentological and geomorphological evidence of extreme floods in the forelands of both contemporary and Pleistocene glaciers and ice sheets. Reports on this subject come from areas and periods of different glaciations. In Poland such events have been documented in more than ten works. This situation prompts us to establish whether or not the occurrence of such extreme events was more frequent and widespread in the area of Poland than it has been believed to date. The article reviews the existing research concerning within the extent of Pleistocene glaciations in Poland, which include the occurrence of high energy glacial outburst floods in the interpretation of sediments or landforms. Its objective is to determine the current state of knowledge and to indicate the direction of further research. The review also includes a study of palaeogeographic conditions of the previously documented jökulhlaup in Siedlątków, on the border of the Łask Heights. The analysis of works and the conducted comparisons lead to the conclusion that the state of knowledge about great glacial floods in the Polish Lowland is not satisfactory. It indicates the need to undertake intense studies on the record of such events and their reconstruction as their morphogenetic role e.g. in the formation of ice-marginal valleys and other elements of glacigenic landscape is underrated.
Źródło:
Acta Universitatis Lodziensis. Folia Geographica Physica; 2018, 17; 33-40
1427-9711
2353-6063
Pojawia się w:
Acta Universitatis Lodziensis. Folia Geographica Physica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania mikroprzecieku wybranych kompozytów stomatologicznych po procesie zmęczenia cieplnego
Microleakage of selected thermocycled dental restorations
Autorzy:
Pałka, K.
Niewczas, A.
Powiązania:
https://bibliotekanauki.pl/articles/285272.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
zmęczenie cieplne
wypełnienia stomatologiczne
szczelność brzeżna
mikroprzeciek
thermocycling
dental restorations
marginal integrity
microleakage
Opis:
W pracy badano wpływ cyklicznych obciążeń cieplnych na rozwój szczeliny brzeżnej dla 2 nanohybrydowych i 2 mikrohybrydowych materiałów kompozytowych w wypełnieniach klasy I w ludzkich zębach trzonowych. Próbki były oceniane na mikroskopie stereoskopowym stosując metodę penetrantu. Pomiarów długości szczeliny brzeżnej dokonano z wykorzystaniem systemu analizy obrazu. Mikroprzeciek oceniano na przekrojach wykonanych w kierunku policzkowo–językowym a następnie mezjo-dystalnym poprzez środek wypełnienia, wykorzystując 4-punktowy system oceny. Przedstawiono wyniki szczelności brzeżnej oraz ocenę punktową mikroprzecieku. Zmęczenie cieplne istotnie zwiększa mikroprzeciek w wypełnieniach klasy I, niezależnie od rodzaju kompozytu. Rodzaj kompozytu nie miał również wpływu na szczelność brzeżną.
Microleakage is a major factor contributing to the occurrence of secondary carious lesions around restorations. This study investigated the effect of thermocycling on microleakage of 2 nanohybrid and 2 microhybrid composites Class I restorations in human molars. Specimens were examined by stereomicroscopy using a dye penetration test. The marginal gap was measured using image analysis software before and after thermocycling. Microleakage was evaluated on cross section in a buccolingual direction and then in a mesiodistall direction through the center of the restoration, using the 4-point scoring system. As a result the marginal integrity and microleakage scores were presented. Thermocycling significantly increased the microleakage of Class I composite restorations, independently of composite type. Composite type did not directly determine marginal integrity and microleakage as well.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 106-108; 35-38
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania in vitro szczeliny brzeżnej w warstwie wierzchniej systemu biomechanicznego ząb – wypełnienie kompozytowe
In vitro examination of the marginal gap in the surface area of the tooth-composite filling biomechanical system
Autorzy:
Pieniak, D.
Niewczas, A.
Bieniaś, J.
Pałka, K.
Powiązania:
https://bibliotekanauki.pl/articles/285738.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
materiały kompozytowe
symulator żucia
szczelina brzeżna
restorative composite materials
mastication simulator
marginal gap
Opis:
Celem badań była ocena ilościowa szczeliny brzeżnej systemu biomechanicznego ząb - wypełnienie kompozytowe z wykorzystaniem symulatora żucia w warunkach in vitro. Do badań wykorzystano: przedtrzonowe i trzonowe zęby ludzkie (preparowano ubytki klasy I wg Blacka) oraz materiał kompozytowy (ELS, Saremco AG). Testy zużycia przeprowadzono na oryginalnym trójosiowym symulatorze żucia (siła zgryzowa 400N, zaprogramowana trajektoria żucia - wg. Batesa) przy 0, 30, 60 oraz 100 tys. cyklach żucia. Wykazano że: (1) szczelina brzeżna utworzona przez skurcz polimeryzacyjny pozostaje na niezmienionym poziomie w zakresie od 0 do 30000 cykli żucia, po przekroczeniu tego zakresu następuje znacząca rozbudowa szczeliny, co może prowadzić do degradacji wypełnienia w sensie klinicznym, (2) wykorzystanie symulatora żucia do badań in vitro rozwoju szczeliny brzeżnej umożliwia efektywną, przyśpieszoną ocenę degradacji czynnościowej wypełnień stomatologicznych.
The aim of the study was quantitative evaluation of the restorative composite biomechanical system performed with the use of the mastication simulator in in vitro conditions. Human premorals and morals (defects of class 1 according to Black’s classification were prepared ) and composite material (ELS, Saremco AG) were used in the examination. Wear tests were carried out on the original three-axis mastication simulator (occlusion force 400 N, programmed chewing trajectory – according to Bates) at 0, 30, 60 and 100,000 chewing cycles. It was proved that: (1) the marginal gap formed by a polymerization shrinkage remains at the same unchanged level in the range from 0 to 30000 chewing cycles, after this range is exceeded a considerable expansion of the gap occurs, which may lead to the degradation of the filling in the clinical sense, (2) the use of mastication simulator in in vitro examination of the development of marginal gap enables effective and faster assessment of functional degradation of dental fillings.
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 247-249
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Budowa geologiczna rejonu Otyń - Niedoradz (krawędź pradoliny głogowsko - barudzkiej
Geological structure of Otyń - Niedoradz region (margin of głogowsko - barudzka proglacial stream valley)
Autorzy:
Kraiński, A.
Powiązania:
https://bibliotekanauki.pl/articles/372111.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
pradolina głogowsko-barudzka
osady zastoiskowe
głogowsko-barudzka proglacial stream valley
marginal lake sediments
Opis:
W prezentowanej pracy opisano budowę geologiczną fragmentu pradoliny głogowsko - barudzkiej w okolicy Otynia i Niedoradza. Autor dyskutuje z modelem budowy geologicznej przedstawionym na Szczegółowej Mapie Geologicznej Polski. Wydzielone zostały poziomy mułkowe w obrębie pradoliny.
Paper presents geological structure of a fragment of głogowsko - barudzka proglacial stream valley in region of Otyń and Niedoradz. Author discuss with the model of geological structure presented in Geological Map of Poland. Author describes several levels of silts within the valley limits.
Źródło:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2010, 139 (19); 33-39
1895-7323
Pojawia się w:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flow Assurance Study on Offshore Marginal Oil Field Development in Vietnam: The Case of Ca Ngu Vang Oil Field
Badanie zapewnienia rozwoju przepływu w przybrzeżnych marginalnych pól naftowych w Wietnamie: Studium przypadku pola naftowego Ca Ngu Vang
Autorzy:
Nguyen, Van Tinh
Nguyen, Thi Hai Yen
Trinh, Tien Thang
Tong, Canh Son
Le, Dinh Hoe
Powiązania:
https://bibliotekanauki.pl/articles/318493.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
marginal field
flow assurance
pipeline
Ca Ngu Vang
pole marginalne
zapewnienie przepływu
rurociąg
Opis:
Over the last few years, PetroVietnam has discovered and exploited several marginal oil fields such as Ca Ngu Vang, Te Giac Trang, Hai Su Den, Hai Su Trang, etc. however the reserves are modest. Test results received during drilling exploratory wells within these fields indicated that the maximum total daily production rate from the wells could promisingly range to about 20,000 barrels of oil per day (BOPD). Unfortunately, the optimum development of these offshore oil fields still offers numerous challenges to oil engineers due to the limitations of equipment and technology. Oil production activities worldwide show that if the daily production of an offshore oilfield is less than 20,000 BOPD, a connection of the marginal fields to their nearest larger oil field should be taken into consideration in order to efficaciously recover more crude oil. Often, this method of production requires a long subsea pipeline system. Besides, the transportation of the fluids from these fields to the processing platform will undergo several serious problems caused by the deposition of wax. All these matters should be handled to guarantee the performance of transportation. A number of models using PIPESIM, PIPEPHRASE and OLGA have been applied to design and examine the operations of the subsea pipeline in different working conditions. Results of the simulations proposed the use of passive insulation to economically eliminate wax deposition and recommended proper pipeline shutdown operations to minimize several problems related to flow assurance issues in the region of interest.
W ciągu ostatnich kilku lat w Vietnamie odkryto i eksploatowano kilka marginalnych pól naftowych, takich jak Ca Ngu Vang, Te Giac Trang, Hai Su Den, Hai Su Trang, itd.… Jednak zasoby są skromne. Wyniki testów otrzymane podczas wiercenia odwiertów poszukiwawczych na tych polach wykazały, że maksymalny całkowity dzienny poziom wydobycia z odwiertów może potencjalnie sięgać około 20 000 baryłek ropy dziennie (BOPD). Niestety, optymalny rozwój tych przybrzeżnych pól naftowych nadal stwarza liczne wyzwania dla inżynierów naftowych ze względu na ograniczenia sprzętu i technologii. Działalność wydobywcza ropy naftowej na całym świecie pokazuje, że jeśli dzienna produkcja morskiego pola naftowego jest mniejsza niż 20 000 BOPD, należy wziąć pod uwagę połączenie pól marginalnych z ich najbliższym większym polem naftowym, aby efektywnie odzyskać więcej ropy. Często ta metoda produkcji wymaga długiego systemu rurociągów podmorskich. Poza tym transport płynów z tych pól na platformę obróbkową będzie wiązał się z kilkoma poważnymi problemami spowodowanymi osadzaniem się wosku. Wszystkie te sprawy powinny być załatwione, aby zagwarantować wykonanie transportu. Szereg modeli wykorzystujących PIPESIM, PIPEPHRASE i OLGA zostało zastosowanych do projektowania i badania działania rurociągu podmorskiego w różnych warunkach pracy. W wynikach symulacji zaproponowano zastosowanie izolacji pasywnej w celu ekonomicznego wyeliminowania osadzania się wosku oraz zalecono prawidłowe operacje wyłączania rurociągu, aby zminimalizować kilka problemów związanych z kwestiami zapewnienia przepływu w obszarze zainteresowania.
Źródło:
Inżynieria Mineralna; 2020, 1, 2; 15-22
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geostatistical model (2D) of the surface distribution of electricity transmission marginal costs
Autorzy:
Namysłowska-Wilczyńska, Barbara
Wilczyński, Artur
Powiązania:
https://bibliotekanauki.pl/articles/425181.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
marginal transmission costs
variation
electric energy
estimation
surface distri-bution costs
ordinary kriging
Opis:
The paper presents a surface model of the accounting costs of electricity transmission over the 220 kV and 400 kV networks. In the further stages of the studies, taking into account the results of structural analysis of marginal costs variation, an estimation technique, such as the ordinary (block) kriging, was used to build the model (2D). The model describes the area and time variation of marginal costs, and has great potential in the electrical power sector, especially in the context of the development of market mechanisms in electric energy trading. The model has made it possible to observe the existing tendencies in cost (directional and time) variation, which is useful for setting electricity transmission tariffs stimulating properly the behaviour of the electric power network users – the electricity suppliers and consumers. Thus, this way of stimulating takes into account the electric power network’s specificity and operating conditions, including the network losses (caused by electricity transmission), the transmission constraints and the broadly understood operational safety of the electric power system. The model of the area variation of electricity transmission marginal costs is also useful in electric power system development planning procedures.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 1(39); 85-99
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural analysis of variation of electricity transmission marginal costs
Autorzy:
Namysłowska-Wilczyńska, Barbara
Wilczyński, Artur
Powiązania:
https://bibliotekanauki.pl/articles/425231.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
marginal transmission costs
variation of costs
electric energy
isotropic vario-gram
directional variogram
Opis:
The paper presents a surface model of the accounting costs of electricity transmission over the 220 kV and 400 kV networks. A structural analysis of marginal costs variation was carried out. Variogram functions (isotropic, directional variogram, variograms roses) were used to build the model. The model describes well the considered phenomenon, i.e. the area and time variation of marginal costs, and has great potential in the electrical power sector, especially in the context of the development of market mechanisms in electric energy trading. The model has made it possible to observe the existing tendencies in cost (directional and time) variation, which is useful for setting electricity transmission tariffs correctly stimulating the behaviour of the electric power network users – the electricity suppliers and consumers.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 1(39); 71-84
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pattern Selection in the Eutectic Growth - Thermodynamic Interpretation
Autorzy:
Wołczyński, W.
Powiązania:
https://bibliotekanauki.pl/articles/352184.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
criterion of lower minimum entropy production
structural competition
marginal stability
irregular growth
microsegregation
Opis:
The (Zn) – single crystal strengthened by the E = (Zn) + Zn16 Ti eutectic precipitate is subjected to directional growth by the Bridgman’s system and current analysis. Experimentally, the strengthening layers (stripes) are generated periodically in the (Zn) – single crystal as a result of the cyclical course of precipitation which accompanies the directional solidification. These layers evince diversified eutectic morphologies like irregular rods, regular lamellae, and regular rods. The L – shape rods of the Zn16 Ti – intermetallic compound appear within the first range of the growth rates when the irregular eutectic structure is formed. Next, the branched rods transform into regular rods and subsequently the regular rods into regular lamellae transitions can be recorded. The regular lamellae exist only within a certain range of growth rates. Finally, the regular rods reappear at some elevated growth rates. A new solution to the diffusion equation is provided to describe the micro-field of the solute concentration in the liquid adjacent to the front of the growing eutectic structure. The solution is based on the mass balance in the considered system. Moreover, the existence of the protrusion of the leading eutectic phase over the wetting one is required by the mass balance. The appearance of the d – protrusion in the growing eutectic is well confirmed by the experimental observations of the frozen solid/liquid interface.The mentioned solution satisfies the concept of the eutectic coupled growth according to which undercooling of the leading phase is less than undercooling of the wetting eutectic phase. Also, the Ti – solute micro-segregation / redistribution is analyzed within the matrix of the single crystal. The micro-segregation is described as a result of the solution to the adequate, newly developed differential equation. The definition for the solute redistribution is given by the subsequently / separately formulated relationship. This definition takes into account both extent -, and intensity of the solute redistribution. Finally, the entropy production is calculated for the regular lamellae -, and for the regular rods formation, respectively. The entropy production is a function of some parameters which define the eutectic phase diagram, coefficient of the diffusion in the liquid, and some capillary parameters connected with the mechanical equilibrium located at the triple point of the solid/liquid interface. Branches formation is related to the marginal stability. A new criterion is formulated and subjected to successful verification. It is: in the structural – thermodynamic competition the winner is this kind of the pattern for which minimum entropy production has a lower value.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 653-666
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MARGINALIA W „ROZMYŚLANIACH DOMINIKAŃSKICH”. PROLEGOMENA
Marginal notes in "Rozmyślania Dominikańskie". An Introduction
Autorzy:
Ziółkowska, Olga
Powiązania:
https://bibliotekanauki.pl/articles/459775.pdf
Data publikacji:
2015
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Rozmyślania dominikańskie
glosy
średniowiecze
apokryf
marginalia
marginal notes
Middle Ages
apocrypha
history of language
Opis:
W artykule przedstawiono różne typy marginaliów znajdujących się w Rozmyślaniach dominikańskich – średniowiecznej narracji biblijno-apokryficznej, którą w 1958 r. odnalazł Karol Górski. Zarysowano podstawowe problemy badawcze, charakterystyczne dla każdej z wydzielonych grup glos: glosy informujące o dziejach kodeksu; glosy zawierające modlitwy; glosy lokalizujące, odsyłające do Pisma Świętego; glosy komentujące. W artykule zasygnalizowano także zagadnienie wymagające odrębnej analizy – obecność różnego rodzaju dopisków na miniaturach i obok nich.
This paper presents the various types of marginal notes found in the Rozmyślania Dominikańskie - a medieval biblical and apocryphal narrative which was discovered by Karol Górski in 1958. The fundamental research issues specific to each group of marginal notes are presented - those concerning the history of the codex; those which contain prayers; those which refer to the Bible; and those which commentate. The article also indicates an issue requiring separate analysis - different types of annotations in and around the illustrations.
Źródło:
Ogrody Nauk i Sztuk; 2015, 5; 433-441
2084-1426
Pojawia się w:
Ogrody Nauk i Sztuk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kłopoty z marginalną teorią podziału Clarka
Trouble with Clark’s Theory of Distribution
Autorzy:
Tokarski, Tomasz
Zachorowska-Mazurkiewicz, Anna
Powiązania:
https://bibliotekanauki.pl/articles/576016.pdf
Data publikacji:
2016-12-31
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
marginalna teoria podziału
John Bates Clark
modele ekonomiczne
marginal theory of distribution
economic models
Opis:
The main objective of the article is to demonstrate the falseness of the so-called marginal theory of distribution as it is used today. This theory was originally coined by American economist John Bates Clark in the late 19th century. However, the modern version of the theory, used in macroeconomic models including dynamic stochastic general equilibrium (DSGE) modeling, departs from the original concept. In the first section of this article, the history of the theory of distribution is presented, from the time Clark formulated the theory to the present day. In the following section, a formal proof of the falseness of the contemporary version of the marginal theory of distribution is shown. The proof is illustrated by examples using data from Italy and Poland.
Artykuł ma na celu wykazanie fałszywości współcześnie wykorzystywanej postaci marginalnej teorii podziału. Teoria ta pierwotnie opracowana została przez Johna Batesa Clarka, pierwszego wybitnego ekonomistę amerykańskiego. Jednak jej współczesna postać - wykorzystywana między innymi w modelach makroekonomicznych, w tym modelach DSGE - odbiega od swojego pierwowzoru. W pierwszej części artykułu skupiono się więc na prześledzeniu historii teorii podziału od czasu jej sformułowania przez Clarka, do czasów współczesnych. Następnie, w części drugiej, przedstawiono dowód na fałszywość współcześnie wykorzystywanej postaci teorii podziału, ilustrując go przykładami z wykorzystaniem danych z Włoch i Polski.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2016, 286, 6; 23-42
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metaheuristic optimization of marginal risk constrained long - short portfolios
Autorzy:
Vijayalakshmi Pai, G. A.
Michel, T.
Powiązania:
https://bibliotekanauki.pl/articles/91858.pdf
Data publikacji:
2012
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
metaheuristic
optimization
portfolio optimization
marginal risk
quadratic programming
meta heuristic method
data envelopment analysis
Opis:
The problem of portfolio optimization with its twin objectives of maximizing expected portfolio return and minimizing portfolio risk renders itself difficult for direct solving using traditional methods when constraints reflective of investor preferences, risk management and market conditions are imposed on the underlying mathematical model. Marginal risk that represents the risk contributed by an asset to the total portfolio risk is an important criterion during portfolio selection and risk management. However, the inclusion of the constraint turns the problem model into a notorious non-convex quadratic constrained quadratic programming problem that seeks acceptable solutions using metaheuristic methods. In this work, two metaheuristic methods, viz., Evolution Strategy with Hall of Fame and Differential Evolution (rand/1/bin) with Hall of Fame have been evolved to solve the complex problem and compare the quality of the solutions obtained. The experimental studies have been undertaken on the Bombay Stock Exchange (BSE200) data set for the period March 1999-March 2009. The efficiency of the portfolios obtained by the two metaheuristic methods have been analyzed using Data Envelopment Analysis.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 3; 259-274
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Internalization of External Costs in the EU Transport Sector as an Instrument of Rationalization of the Logistics Supply Chains
Autorzy:
Grzelakowski, Andrzej S.
Powiązania:
https://bibliotekanauki.pl/articles/504630.pdf
Data publikacji:
2011
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
external costs
internalization
social marginal costs
supply chain
logistics operator
transport and inventory costs
Opis:
Aiming at meeting the general EU transport policy objective, the EC has started promoting very actively the sustainable development of the member states transport systems. Putting into effect common framework and methodology for estimating the external costs of transport activities and specifying how external costs can be internalized in all modes of transport, the EC intends to minimize their negative impact on all spheres of human activity. This strategy needs to apply social marginal cost pricing (SMCP) for the use of transport infrastructure. It could, however, induce significant changes on the EU transport markets and subsequently affect the supply networks and logistics supply chains leading to their rationalization in terms of optimizing transport and inventory costs.
Źródło:
Logistics and Transport; 2011, 13, 2; 57-68
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł

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