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Wyświetlanie 1-15 z 86
Tytuł:
Research of Data Sequences of Groundwater Levels with Gaps
Autorzy:
Tymkiv, Mariia
Kasiyanchuk, Dmytro
Powiązania:
https://bibliotekanauki.pl/articles/124093.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
groundwater
gaps
analysis
Opis:
Investigating the regime of groundwater levels is one of the main stages of hydrogeological research, which allows quantitative characterization of the process of formation and change of hydrogeological conditions in time. To date, there has been a problem in filling the series of groundwater levels (GWLs) that have gaps. During the formation of time series of data, there are usually gaps in connection with the change in the technique of observing the GWL, the untimely filling of data rows, the lack of the ability to conduct such observations, and others like that. However, it is not possible to completely exclude rows with spaces, as this may lead to inaccurate data while developing forecast and constructing predictive maps of groundwater levels. Therefore, the task is to compare the existing methods of filling the data series with spaces in order to choose the optimum for further work, with their practical verification.
Źródło:
Journal of Ecological Engineering; 2019, 20, 3; 141-151
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A consequence of an effective form of the abc-conjecture
Autorzy:
Browkin, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/965995.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
abc-extremal examples
gaps
abc-conjecture
Opis:
T. Cochrane and R. E. Dressler [CD] proved that the abc-conjecture implies that, for every > 0, the gap between two consecutive numbers A $A^{0.4}$ with two exceptions given in Table 2.
Źródło:
Colloquium Mathematicum; 1999, 82, 1; 79-84
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From Polyanna syndrome to Eeyore’s Corner? Hope and pain in patients with chronic low back pain
Autorzy:
Wojtyna, Ewa
Palt, Łukasz
Popiołek, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/430379.pdf
Data publikacji:
2015-03-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pain
hope-trait
hope-state
empathy gaps
Opis:
Chronic low back pain affects 50-80% of the population, while its consequences may impair the functioning of patients suffering from it, in many spheres of life . Hope is a factor which may influence coping with pain as well as cognitive reflection of pain experience. The aim of the study has been to check: 1) whether dependencies exist between hope-trait and hope-state and the perception of pain; 2) whether experiencing pain at the time of filling questionnaires matters for the assessment of the level of hope; 3) whether there is interaction between hope, the pain experienced at the moment of investigation, and memory of the intensity of previously experienced pain. 150 patients participated in the study, they all reported aggravation of the chronic low back pain syndrome. The study was a cross-sectional study, based on questionnaires. On the third day of treatment the subjects were given the following questionnaires: Trait Hope Scale, State Hope Scale, and Numerical Rating Scale of Pain to fill. Poor correlation was demonstrated to exist between hope-state and hope-pathways on the one hand, and the intensity of minimum pain level experienced during the first three days of treatment. It has been noted that the presence of pain at the time of filling questionnaires results in reducing the hope-state, but only in those persons, who had experienced severe pain previously. On the other hand, in case of patients who had experienced slight pain previously, the pain present when filling in the questionnaires is conducive to enhanced hope-state. The results of the study confirm the complex character of relations between hope and pain.
Źródło:
Polish Psychological Bulletin; 2015, 46, 1; 96-103
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niwelowanie luk w procesie sukcesji przedsiębiorstw rodzinnych
Eliminating of gaps in the process of family business succession
Autorzy:
Dźwigoł-Barosz, M.
Powiązania:
https://bibliotekanauki.pl/articles/324709.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
sukcesja
przedsiębiorstwo rodzinne
luki
succession
family businesses
gaps
Opis:
W artykule zaprezentowano zagadnienia z obszaru sukcesji przedsiębiorstw rodzinnych. Szczególną uwagę zwrócono na cztery bariery, które w tym procesie mogą wystąpić, tj. lukę: pokoleniową, wiarygodności, komunikacyjną i emocjonalną. Uzupełnieniem rozważań jest propozycja teoretycznego modelu sukcesji przedsiębiorstw rodzinnych, który zawiera przykładowe metody niwelowania tych zjawisk, celem zapewnienia ciągłości zarządzania w tego typu przedsiębiorstwach.
The paper presents issues concerning succession of family businesses. Particular emphasis has been placed on four barriers which may occur in this process, i.e. the generation gap, the reliability gap, the communication gap and the emotional gap. The reflections are supplemented with a proposal of a theoretical model of family business succession which include sample methods of elimination of those occurrences with the purpose to ensure continuity of management in such enterprises.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2017, 101; 125-139
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poland’s Voivodeships and Poviats and the Geographies of Knowledge: Addressing Uneven Human Resources
Autorzy:
Brunn, Stanley D.
Semczuk, Marcin
Koszek, Rafał
Gołuszka, Karolina
Bołoz, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/1018391.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Google hyperlinks
human welfare
knowledge economies
knowledge gaps
Opis:
In a postindustrial economic world, information economies are key components in local, regional and national development. These are service economies, built on the production, consumption and dissemination of information, including education, health care, outsourcing, tourism, sustainability and related human welfare services. We explore the geography/knowledge intersections in Poland’s voivodeships and poviats by using the volumes of information or hyperlinks about selected information economies. Google hyperlinks are electronic knowledge data that can be mapped to highlight the areas of most and least information about certain subject categories. While some mapping results are expected, such as Warsaw and Krakow, being prominent, in other regions there are unexpected gaps within eastern, northern and southern Poland, including some places near major metropolitan centers. There is a significant difference between the cities with poviat rights, which stand out in the number of information on items comparing to the poviats that surround them. The majority of poviats in Mazowieckie voivodeship are surprisingly recognized as core areas on the map of knowledge, nevertheless they are considered undeveloped from the economic point of view.
Źródło:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego; 2016, 30, 2; 198-208
2080-1653
Pojawia się w:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controlling magnetic inductance by air-gap configuration in power electronics applications
Autorzy:
Kasikowski, Rafal
Powiązania:
https://bibliotekanauki.pl/articles/27309945.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
air gaps
electromagnetic modelling
magnetic cores
power electronics
Opis:
Gapped magnetic components are inherent to applications where conversion of power would force magnetic flux density beyond the saturation point of magnetic materials. A physical discontinuity in a magnetic path, which an air gap represents, signifies a drastic change in its reluctance to magnetic flux. This gives rise to a phenomenon referred to as the fringing effect, which impacts the performance of magnetic components. The fringing flux also affects the physical properties of magnetic components, such as magnetic reluctance and inductance. Since inductance of gapped magnetic components is a function of the size of the air gap, a relatively simple change to the configuration of the air gap or splitting a single gap into a plurality of gaps entails, frequently, a radical change to the magnetic circuit of the component. This paper examines the way the air-gap configuration affects the distribution of the fringing flux and, by extension, magnetic reluctance and inductance. A method to aid the design of multigap inductors is presented based on 3-D electromagnetic modelling as well as measurements. An analytic expression, which closely approximates the required length of quasi-distributed gaps substituting a single gap, is developed.
Źródło:
Archives of Electrical Engineering; 2023, 72, 3; 677-695
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ liczebności próby i metody zastępowania braków odpowiedzi na miary dopasowania oraz wyniki modelowania ścieżkowego
Influence of a sample size and a method of hand- ling missing values on the results and goodness of fit of the path relation model
Autorzy:
Skowron, Łukasz
Gąsior, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/424919.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
path relation model
SEM
PLS
data gaps
sample size
Opis:
In the following article the authors describe the problem of influence of a sample size and a method of handling missing values on the results and goodness of fit of the path relation model. In order to estimate the goodness of fit of the model the authors use the indicators which describe the internal (Cronbach’s Alfa, Composite Reliability) and external (R2) stability of the model. By the term “results of the models” the authors mean estimated index values for latent variables and path coefficients of the SEM modeling procedure. In the research the authors analysed outcomes of Partial Least Squares method, used to build a model of Lublin shopping malls sector customers’ satisfaction and loyalty. The research included 43 datasets that varied in a number of observations and a method used for solving the missing values problem. Obtained results not only allowed the authors to statistically verify the main research problem of the study, but also enabled researchers to evaluate practical applicability of the analyzed imputation methods in real market and business consultancy activities. The research showed the supremacy of the Predictive Mean Matching and CART algorithms over other methods in the majority of analyzed ceases. Nevertheless, the differences between obtained results were rather insignificant, so one may assume that there is no visible influence of the used method on the practical interpretation of the obtained model and analyzed phenomenon.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2016, 3 (53); 42-53
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kryzys lat 2007–2009 i luka informacyjna w sektorze finansowym
The Crisis of 2007–2009 and Information Gaps in the Financial Sector
Autorzy:
Siwiński, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/957025.pdf
Data publikacji:
2013-06-15
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
financial crisis
financial liquidity
systemic risk
financial information gaps
Opis:
Purpose: The paper aims at identifying the major information gaps related to the financial sector that have emerged during the last years, including the explanation of the reasons and consequences of these gaps. Methodology: The analysis is conducted using the descriptive methodology based on real developments in the financial sector. This analysis identifies substantial institutional changes within the financial sector combined with the introduction of new financial instruments that significantly increased information gaps related to financial developments. Findings: We found that one of the main reasons for the breakdown in the financial liquidity market was the sudden buildup of a systemic risk caused, among other things, by substantial information gaps and limitations in the transparency of financial markets. The low transparency of the financial markets has been caused by institutional changes and new financial instruments introduced within the financial sector. They were introduced by the financial institutions themselves to facilitate very risky financial activities that were very profitable for them in the short term, but – as it occurred – very disruptive for the whole financial system and the whole economy in the longer term. Research limitations: The analysis is limited only to the consideration of the causes and consequences of statistical gaps substantially reducing the transparency of the financial sector. A more comprehensive project should also explore and provide an appropriate proposal for remedy data and – even more important – a proposal to set up a macroprudential policy framework. Originality: The original contribution of the paper is the link between specific institutional changes within the financial sector as well as new financial instruments and the emergence of particular information gaps.
Źródło:
Management and Business Administration. Central Europe; 2013, 21, 2(121); 6-22
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niewidzenie a kompetencje pragmatyczne w komunikacji
Blindness and pragmatic competence in communication
Autorzy:
Czerwińska, Kornelia
Piskorska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1371441.pdf
Data publikacji:
2019-01-07
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
blind student
EFL
comprehension
gaps in knowledge
pragmatic competence
Opis:
The paper argues that gaps in knowledge attested in congenitally blind individuals may negatively affect their performance in foreign language tasks testing reading comprehension. Characteristics of a blind learner at various stages of cognitive and educational development are presented, with focus on gaps in knowledge resulting from sight impairment. The concept of pragmatic competence is first explained generally in reference to communication and then it is applied to a case of a comprehension task taken from an EFL exam (Polish “matura”, basic level). An analysis of the text indicates that despite being relatively simple in linguistic terms, comprehension tasks may pose a significant processing challenge to blind students due to a large amount of implicitly communicated information dependent on visual experience.
Źródło:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej; 2018, 21; 185-206
2300-391X
Pojawia się w:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photonic band gap in negative ternary refractive indices of two-dimensional photonic crystal
Autorzy:
Gharaati, A
Mohamadebrahimi, L
Roozitalab, Z
Powiązania:
https://bibliotekanauki.pl/articles/174931.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
negative refraction
two dimensional photonic crystals
metamaterials
band gaps
Opis:
In this paper, we study propagation of electromagnetic wave in negative ternary refractive indices of two-dimensional photonic crystals. We consider two structures with two concentric cylindrical rod and shell in which one of them has negative refractive indices, in positive dielectric background. It is shown that by increasing the diameter of the rod in both structures, we can obtain more and wider band gaps in comparison with the structures in which there is no negative refractive index materials. This increase is more considerable in the first structure, in which the rod has a negative refractive index, in comparison with the second one, where the rod has a positive refractive index.
Źródło:
Optica Applicata; 2014, 44, 4; 637-648
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Symulacyjna analiza wpływu liczby i rozmieszczenia luk niesystematycznych na dokładność prognoz
Simulation analysis of influence of number and distribution of unsystematic gaps on the accuracy of forecasts
Autorzy:
Oesterreich, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/425016.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
forecasting of missing data
simulation methods
analysis of gaps distribution
Opis:
In this paper there was conducted a statistical analysis of the impact of the distribution of unsystematic gaps on the accouracy of inter- and extrapolative forecasts in the seasonal time series. In the analysis, as variable, there was used the average period of stay of tourists in accommodation establishments in the West Pomeranian Voivodeship in the years 2008-2013. In calculations there were used simulation methods to generate ten thousand sets of gaps for the three variants, differed in the number of gaps. For all the set and variants of gaps, there were estimated time series models with exponential trend and relatively-fixed seasonality. In the next step there were built inter- and extrapolative forecasts and calculated their relative errors (MAPE). In the analysis there were used R program and Statistica 10.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2015, 2 (48); 78-88
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie programu GAPS do pozycjonowania kinematycznego
Application of GAPS Software for Kinematic Positioning
Autorzy:
Krasuski, K.
Powiązania:
https://bibliotekanauki.pl/articles/403673.pdf
Data publikacji:
2016
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
GPS
GAPS
metoda PPP
dokładność pozycjonowania
PPP method
positioning accuracy
Opis:
W artykule przedstawiono wyniki badań dotyczących wyznaczenia pozycji statku powietrznego w trybie kinematycznym w systemie GPS. W obliczeniach użyto dwuczęstotliwościowych obserwacji kodowo-fazowych GPS z odbiornika Topcon TPS Hiper. Pozycja samolotu została wyznaczona w komercyjnym oprogramowaniu GAPS, przy zastosowaniu metody PPP. Dodatkowo, w artykule scharakteryzowano program GAPS oraz metodę PPP. Wstępne rezultaty z programu GAPS umożliwiają osiągnięcie dokładności około 0,035 m dla współrzędnych horyzontalnych oraz ponad 0,06 m dla współrzędnej wertykalnej. W artykule porównano również wartości błędów średnich z programu GAPS i CSRS-PPP oraz wyznaczono parametr RMS dla wysokości elipsoidalnej H.
The paper presents the results on determination of aircraft’s position in kinematic mode in GPS system. The dual-frequency code and phase observations from Topcon TPS Hiper receiver were used for computations. The aircraft’s position in commercial GAPS software was estimated using PPP method. In addition, the GAPS software and PPP method were characterized. Preliminary results from GAPS software show that accuracy for horizontal coordinates is about 0.035 m and for vertical coordinate it is more than 0.06 m, respectively. Mean errors from GAPS and CSRS-PPP software were also compared and RMS parameter for the ellipsoidal height H was determined.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2016, 7, 2 (24); 117-130
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social and economic development of Ukraine: Modelling the migration factor impact
Autorzy:
Vasyltsiv, Taras
Mulska, Olha
Osinska, Oksana
Makhonyuk, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/2131144.pdf
Data publikacji:
2022-10-07
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
economic growth
social development
migration
remittances
causality
Granger test
gaps
Opis:
The paper aims to analyse the dependence of the economic and social development of Ukraine on migration factors (human resources and remittances) in the years 2002–2020. It proves the strength of the impact of human resources outflow and remittances on the labour market (employment) and other variables capturing the level of economic and social development. Based on the calculated social and economic development composite indicators the paper detects the migration gaps in the development of the economic system and social domain depending on the human resources outflow and remittances inflow. The results of the empirical research show a positive causal relationship between social development environments and migration and a mixed impact of the migration factor on economic system.
Źródło:
Economics and Business Review; 2022, 8, 3; 27-58
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identifying quality gaps in tourism for people with disabilities: Importance-Performance Analysis (IPA)
Autorzy:
Skalska, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/52054288.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
tourism of people with disabilities
Importance-Performance Analysis
quality gaps
Opis:
The aim of the article is to assess the significance (importance) and level of inconvenience of selected attributes of tourist services provided at particular stages of the supply chain in tourism (information, accommodation, transport, organization and intermediation) in relation to people with various types and degrees of disability. The survey conducted among the disabled helped to identify quality gaps in the provision of tourism services, taking into account their complementarity and accessibility at every stage of delivery. The method of Importance-Performance Analysis (IPA) and basic measures of descriptive statistics were used to analyze empirical data. The study will help to indicate to what extent the tourist experience of a disabled person and the type of disability affect the assessment of the significance (importance) and inconvenience of selected attributes of tourist services. The results of the research can be used by entrepreneurs to analyze the quality and reliability of services provided by their partners and the behavior and needs of the disabled in tourism. They will also be useful for local and regional authorities responsible for ensuring the competitiveness and inclusiveness of tourism regions.
Źródło:
Turyzm; 2023, 33, 1; 41-48
0867-5856
2080-6922
Pojawia się w:
Turyzm
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane postawy uczestników rynku wobec braków informacyjnych na rynku nieruchomości
Selected attitudes of market participants with respect to information gaps in real estate market
Autorzy:
Brzezicka, Justyna
Wiśniewski, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/570004.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
real estate market
information gaps
conformity
heuristic availability
self-attribution bias
Opis:
The present article deals with selected attitudes of market participants with respect to information gaps in real estate market. Real estate markets have recently become “active players” on an international scale. This situation leads to a careful observation of phenomena that occur on real estate markets. Nonetheless, information gaps prevent the smooth functioning of the markets in which information serves as a source of many processes. The lack of reliable, complete and current information about real estate prices makes market entities prone to search for the prices and succumb to substitute strategies that compensate the information gaps. The thesis of the present article concentrates on information gaps in the real estate market as favourable conditions for occurring the phenomenon of social influence. The hypothesis was formulated as follows: informational conformity as a factor affecting real estate price. The paper consists of two integral parts: theoretical and practical. The theoretical part concentrates on the phenomenon of social influence on real estate market which results from information gaps. Furthermore, the concept of social influence has been explained in detail. The phenomenon of social influence is defined as a situation in which entities lack proper knowledge how to react, what decision to take or what position to adopt in a particular contention, thus those entities depend on other people’s knowledge assuming that they know how to behave or that their knowledge is more accurate. As a result, the afore-mentioned entities copy behaviour noticed in others. Moreover, in the theoretical part the concepts of self-attribution bias and heuristic availability have been presented as well as their importance in the system of real estate market. The aim of the practical part was to verify whether the participants of real estate market were influenced by informational conformity. The research was conducted among the students of the University of Warmia and Mazury in Olsztyn and Kielce School of Economics, Tourism and Social Sciences. The subject matter was to verify prices of commercial and residential properties in Olsztyn and Kielce and price trends in those markets. In a planned experiment students worked in groups of six (one leader and five participants). Each team was to persuade a leader to accept the price of a particular property and to design a market trend according to the belief of the group. An opinion survey was used as a tool of research. The undertaken study allowed to achieve the research aim and confirm the research hypothesis. The most important conclusions are as follows: information gaps in real estate market contribute to emerging the phenomenon of informational conformity, which is not indifferent to real estate prices and decisions of market participants. Taking into consideration the specificity of the real estate market and the occurrence of other bahavioural factors, a tendency among entities to follow the fo
Źródło:
Ekonomia XXI Wieku; 2014, 2(2); 106-121
2353-8929
Pojawia się w:
Ekonomia XXI Wieku
Dostawca treści:
Biblioteka Nauki
Artykuł
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