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Tytuł:
Management in the Time of "Generalized Uncertainty" the Question of Revelvance
Autorzy:
Koźmiński, Andrzej K.
Powiązania:
https://bibliotekanauki.pl/articles/417387.pdf
Data publikacji:
2015
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
Uncertainty
Opis:
Uncertainty is a state of mind. Around 1930 at the beginning of the big depression crisis, Keynes predicted that during the next 100 years, the standard of living in the most advanced countries will increase from four to eightfold. In spite of World War II, this overly optimistic prediction (as it seemed at that time) was confirmed in the 80 years since Keynes’s prophecy. In spite of the big crisis of the 1930s and the devastation of World War II, the standard of living in the western world increased four to fivefold.
Źródło:
Management and Business Administration. Central Europe; 2015, 4; 2-10
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty propagation in structural reliability with implicit limit state functions under aleatory and epistemic uncertainties
Autorzy:
Zhou, Shuang
Zhang, Jianguo
You, Lingfei
Zhang, Qingyuan
Powiązania:
https://bibliotekanauki.pl/articles/1841668.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
structural reliability
uncertainty quantification
uncertainty propagation
reliability index
uncertainty theory
Opis:
Uncertainty propagation plays a pivotal role in structural reliability assessment. This paper introduces a novel uncertainty propagation method for structural reliability under different knowledge stages based on probability theory, uncertainty theory and chance theory. Firstly, a surrogate model combining the uniform design and least-squares method is presented to simulate the implicit limit state function with random and uncertain variables. Then, a novel quantification method based on chance theory is derived herein, to calculate the structural reliability under mixed aleatory and epistemic uncertainties. The concepts of chance reliability and chance reliability index (CRI) are defined to show the reliable degree of structure. Besides, the selection principles of uncertainty propagation types and the corresponding reliability estimation methods are given according to the different knowledge stages. The proposed methods are finally applied in a practical structural reliability problem, which illustrates the effectiveness and advantages of the techniques presented in this work.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 231-241
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Program komputerowy do wyznaczania niepewności pomiaru
Software for evaluation of the measurement uncertainty
Autorzy:
Wollek, A.
Powiązania:
https://bibliotekanauki.pl/articles/155816.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niepewność standardowa
złożona niepewność standardowa
niepewność rozszerzona
combined uncertainty
standard uncertainty
complex uncertainty
Opis:
Program „LabMet” służy do opracowywania i gromadzenia wyników pomiarów. Umożliwia on wyznaczenie niepewności dla jednej lub wielu obserwacji w pomiarach bezpośrednich jak: napięcia, prądu, czasu i częstotliwości oraz pomiarze pośrednim – rezystancji. Do zalet programu należą: prosta obsługa, duża odporność na błędy użytkowania, możliwość tworzenia własnej bazy danych mierników, możliwość archiwizacji wyników obliczeń, możliwość rozbudowy programu o następne moduły.
The program „LabMet” is a specialistic program for development and stockpiling of measurement results. It enables evaluating the measurement uncertainty for one as well as many observations, for direct measurements of: voltage, time and frequency, and indirect measurement – of resistance. The program was equipped with a serial decision model, which increased its fault tolerance. A legible graphical interface makes use of the program easy. The program has assisting functions: Help and Tutorial (available along with the main program as the text files in the RTF format). In the paper the way of using the program and its destination are described. Figs. 1 - 4 with individual options of the menu display the main screen of the program. In Fig. 5 an example of the effect of the serial decision-making structure is shown. Fig. 6 contains the computational zoom for the chosen measurement. The presentation of measurement results is depicted in Fig. 7. The Labmet program enables storing results of calculations on a disk as the text files. Moreover, the program cooperates with a system printer enabling the printing of results in the process. They are the advantages of the program. The other advantages are: the simplicity and great fault tolerance of the use, the possibility of creating the own database of meters, the possibility of archiving calculation results, the expendability of the program by next modules.
Źródło:
Pomiary Automatyka Kontrola; 2013, R. 59, nr 1, 1; 28-30
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Static and sensitivity analysis of nonlocal nanobeams subject to load and material uncertainties by convex modeling
Autorzy:
Radebe, I. S.
Adali, S.
Powiązania:
https://bibliotekanauki.pl/articles/281141.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
nanobeams
load uncertainty
material uncertainty
convex modeling
sensitivity
Opis:
At the nano-scale, loads acting on a nanobeam and its material properties are likely to be not known precisely, i.e., uncertain. In the present paper, the deflection of a nanobeam subject to load and material uncertainties is studied by convex modeling of the uncertainties. The level of uncertainty is taken to be bounded and the maximum deflection corresponding to the worst-case of loading or material properties is obtained, that is, the uncertainties are determined so as to maximize the deflection. The sensitivity of the deflection to the uncertainty in the material properties is also investigated. Numerical results are given relating the level of uncertainty to maximum deflection.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 2; 345-356
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accuracy analysis of the 2D resistance-to-voltage converters for resistive sensors
Autorzy:
Warsza, Z. L.
Idźkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/114306.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
converter
error
uncertainty
Opis:
The novelty of this work is the analysis of accuracy measures and its visualization especially for the simultaneous two parameter measurements. The parameters of the resistance-to-voltage converters, i.e. different types of DC circuits with arbitrary variable resistive sensors (of relative resistance increments), and their accuracy measures are discussed. Transfer coefficients, limited error (and also standard uncertainty) as functions of relative increments of resistance are shown in broad range for different types of supply and sensor configuration of the circuit of initial 2D converters.
Źródło:
Measurement Automation Monitoring; 2015, 61, 10; 460-464
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposition of a method of determining the thermovision measurement extended uncertainty of the surface temperature of an object close to a camera lens
Autorzy:
Dziarski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/114078.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
uncertainty
thermography
metrology
Opis:
In the article the influence of selected factors occurring during thermal measurements on the uncertainty of thermovision temperature measurement is discussed. A situation in which the observed surface was close to the camera lens was measured (distance less than one meter). Based on the type B determination methodology described in the literature on the subject, a method of calculating the measurement extended uncertainty is proposed. A division of factors influencing the thermovision temperature measurement uncertainty into external factors and internal factors is also proposed. Factors associated with the conditions prevailing during the measurement, the geometry of the measurement system and the properties of the observed surface were considered external factors. Factors related to the calibration of the thermal imaging camera, the sensor matrix used and the properties of its measuring path were qualified as internal factors. The method of determining the value of the camera display at the highest and lowest value of a particular factor is discussed. The probability distribution for each of the external factors was determined. The measuring system constructed is presented. It is explained how the uncertainty shares and expanded uncertainty were determined in accordance with the method proposed.
Źródło:
Measurement Automation Monitoring; 2019, 65, 1; 7-10
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwzględnienie niepewności pomiaru obydwu wielkości w regresji liniowej
Taking into consideration uncertainties of the both results in linear regreesion
Autorzy:
Dorozhovets, M.
Powiązania:
https://bibliotekanauki.pl/articles/151624.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
linear regression
uncertainty
Opis:
W referacie została zaproponowana i przeanalizowana metoda regresji liniowej, która uwzględnia wpływ niepewności wielkości wejściowej oraz wyjściowej na wartość współczynnika nachylenia prostej. Poprawną wartość współczynnika nachylenia uzyskuje się na drodze minimalizacji sumy kwadratów odchyleń poszukiwanej prostej od punktów eksperymentalnych w kierunku maksymalnego wpływu niepewności wyników pomiaru. Wyprowadzono wzór do obliczenia współczynnika nachylenia prostej jako funkcji parametrów wyników obserwacji oraz ich standardowych niepewności. Wykazano, że wszystkie inne liniowe regresje są przypadkami szczególnymi zaproponowanej metody regresji.
In the paper a new method of calculation of the linear regression is proposed and analyzed. This method takes directly into account the influence of uncertainties of both input and output quantities onto the regression line slope. The correct slope value is calculated under condition to minimization the sum of the squared deviations of desired line from the experimental points in the direction of maximum influence of uncertainties. The formula for the calculation of the regression line slope in function of the parameters of observation results and their standard uncertainties is given. It is shown that all other linear regressions are the particular cases of the regression proposed in this paper.
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 9, 9; 612-615
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure Level Standard Deviation at Low Frecuencies: Effect of the Wall Vibrational Field
Autorzy:
Navacerrada, M. A.
Diaz, C.
Pedrero, A.
Powiązania:
https://bibliotekanauki.pl/articles/176711.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
building acoustic
uncertainty
Opis:
Knowledge of the uncertainty of measurement of testing results is important when results have to be compared with limits and specifications. In the measurement of sound insulation following standards ISO 140-4 and 140-5 the uncertainty of the final magnitude is mainly associated to the average sound pressure levels L1 and L2 measured. However, the study of sound fields in enclosed spaces is very difficult: there are a wide variety of rooms with different sound fields depending on factors as volume, geometry and materials. A parameter what allows us to quantify the spatial variation of the sound pressure level is the standard deviation of the pressure levels measured at the different positions of the room. Based on the analysis of this parameter some results have been pointed out: we show examples on the influence of the microphone positions and the wall characteristics on the uncertainty of the final magnitudes mainly at the low frequencies regime. In this line, we propose a theoretical calculus of the standard deviation as a combined uncertainty of the standard deviation already proposed in the literature focused in the room geometry and the standard deviation associated to the wall vibrational field.
Źródło:
Archives of Acoustics; 2012, 37, 4; 561-569
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyznaczenie niepewności pomiaru w badaniach geometrycznych i defektoskopowych odkuwek metodą ultradźwiękową
Determination of measurement uncertainty in geometrical and defectoscopic tests of forgings using the ultrasonic method
Autorzy:
Samolczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/212157.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
Tematy:
badania ultradźwiękowe
niepewność pomiarowa
niepewność standardowa
niepewność rozszerzona
ultrasound testing
measurement uncertainty
standard uncertainty
expanded uncertainty
Opis:
Wyznaczanie niepewności pomiaru jest konieczną częścią kaSdej procedury pomiarowej. Omówiono metodę wyznaczania niepewności pomiaru w badaniach defektoskopowych odkuwek metodą ultradźwiękową. Wskazano na znaczenie procedur pomiarowych metodą ultradźwiękową analizy źródeł błędów przypadkowych. Przedstawiono sposób wyznaczania niepewności standardowej przy pomiarach bezpośrednich i pośrednich, budżet niepewności oraz uwagi związane z wyborem współczynnika rozszerzenia k, przy wyznaczaniu niepewności rozszerzonej, dla badań cech geometrycznych i defektoskopowych odkuwek, metodą ultradźwiękową.
Determination of measurement uncertainty is a necessary part of every measurement procedure. The paper discusses the method of determining the measurement uncertainty in defectoscopic tests of forgings using the ultrasonic method. The significance of measurement procedures using the ultrasonic method and analysis of sources of random errors were pointed out. The method for determining standard uncertainty for direct and indirect tests, the uncertainty budget and remarks related to selection of the expansion coefficient k for determination of expanded uncertainty for geometric properties and defectoscopic tests of forging using the ultrasonic method have been presented.
Źródło:
Obróbka Plastyczna Metali; 2012, 23, 3; 139-147
0867-2628
Pojawia się w:
Obróbka Plastyczna Metali
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty of science and decision-making – problems with evidence-based policy
Autorzy:
Malinowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1194449.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
science uncertainty
irreducible uncertainty
loser problem
statistical errors
precautionary principle
Opis:
The purpose of this article is primarily to introduce the topic of scientific uncertainty to the wider context of economics and management. Scientific uncertainty is one of the manifestations of irreducible uncertainty and reflection on it should enable better decision making. An entity that bases its operation on current scientific research, which depreciates over time and ultimately leads to erroneous decisions, is referred to as the “loser”. The text indicates estimation of potential scale of this problem supplemented by an outline of sociological difficulties identified in the analysis of the process of building scientific statements. The article ends with a sketch of the answer to the question “how to act in the context of scientific uncertainty?”
Źródło:
Edukacja Ekonomistów i Menedżerów; 2019, 54, 4; 9-29
1734-087X
Pojawia się w:
Edukacja Ekonomistów i Menedżerów
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantifying soil hydraulic properties and their uncertainties by modified GLUE method
Autorzy:
Yan, Yifan
Liu, Jianli
Zhang, Jiabao
Zhao, Yongchao
Xiaopeng, Li
Powiązania:
https://bibliotekanauki.pl/articles/973010.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil hydraulic properties
uncertainty
generalized likelihood uncertainty estimation
evaporation experiment
Opis:
Nonlinear least squares algorithm is commonly used to fit the evaporation experiment data and to obtain the ‘optimal’ soil hydraulic model parameters. But the major defects of nonlinear least squares algorithm include non-uniqueness of the solution to inverse problems and its inability to quantify uncertainties associated with the simulation model. In this study, it is clarified by applying retention curve and a modified generalised likelihood uncertainty estimation method to model calibration. Results show that nonlinear least squares gives good fits to soil water retention curve and unsaturated water conductivity based on data observed by Wind method. And meanwhile, the application of generalised likelihood uncertainty estimation clearly demonstrates that a much wider range of parameters can fit the observations well. Using the ‘optimal’ solution to predict soil water content and conductivity is very risky. Whereas, 95% confidence interval generated by generalised likelihood uncertainty estimation quantifies well the uncertainty of the observed data. With a decrease of water content, the maximum of nash and sutcliffe value generated by generalised likelihood uncertainty estimation performs better and better than the counterpart of nonlinear least squares. 95% confidence interval quantifies well the uncertainties and provides preliminary sensitivities of parameters.
Źródło:
International Agrophysics; 2017, 31, 3; 433-445
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ niepewności i nieprzewidywalności na procesy logistyczne
The influence of uncertainty and unpredictability on logistics processes
Autorzy:
Marzantowicz, Ł.
Jedliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/134489.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
niepewność
nieprzewidywalność
niepewność w logistyce
parametryzacja skutków niepewności
uncertainty
unpredictability
uncertainty in logistics
parameterization of the uncertainty
Opis:
Autorzy artykułu na podstawie teoretycznych rozważań nad zjawiskiem niepewności i nieprzewidywalności w logistyce, bazując na przeglądzie stanowisk i podejść badawczych, podjęli próbę usystematyzowania semantyki w podjętym problemie oraz wskazują na obszary logistyki szczególnie podatne na niepewność i nieprzewidywalność, uwypuklając aspekt transportu morskiego. Teoretyczne rozważania nad rolą niepewności w procesie logistycznym oraz nad relacjami między pojęciami niepewności i nieprzewidywalności stanową podstawę do koncepcyjnego podejścia do możliwości pomiaru niepewności w lądowo-morskim procesie logistycznym. Ten sposób ujęcia problemu pozwala na realizację podstawowego celu artykułu, którym jest wyznaczenie miejsca dla sytuacji niepewności w logistyce na płaszczyźnie efektywności wykorzystania czasu i związku z tym wydajności procesów logistycznych.
The authors of the article on the basis of theoretical considerations on the phenomenon of uncertainty and unpredictability in logistics, based on a review of positions and research approaches, lead to attempts to systematize semantics in the taken problem and indicate the areas of logistics susceptible particularly to uncertainty and unpredictability. Theoretical considerations on the role of uncertainty in the logistics process and the relation between the concepts of uncertainty and unpredictability constitute the basis for a conceptual approach to the possibility of uncertainty’s measurement in the logistics process. The way of recognizing the problem realizes elementary aim of the article, which is to designate space for uncertainty in logistics at the area of efficiency of time and therefore productivity of logistics processes.
Źródło:
Problemy Transportu i Logistyki; 2017, 37, 1; 171-185
1644-275X
2353-3005
Pojawia się w:
Problemy Transportu i Logistyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Belief reliability-based design optimization method with quantile index under epistemic uncertainty
Autorzy:
Chen, Yubing
Wen, Meilin
Zhang, Qingyuan
Kang, Rui
Powiązania:
https://bibliotekanauki.pl/articles/24200835.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
belief reliability
reliability design optimization
epistemic uncertainty
quantile index
uncertainty theory
Opis:
Product reliability design optimization is affected by epistemic uncertainty greatly, which leaves significant risks in product use. In this paper, a new belief reliability-based design optimization (BRBDO) method under epistemic uncertainty is established to handle this problem. First, the belief reliability theory is introduced into the design optimization problem, and a quantile index is proposed to quantify belief reliability level based on uncertainty theory, through which a rapid analysis method called first order belief reliability analysis (FOBRA) method is developed. Then, according to the different trade-off strategies, two types of design optimization models are established, and corresponding FOBRA-based computation methods are also demonstrated. Finally, several case applications are studied to verify the effectiveness of the analysis and design optimization methods proposed in this paper. The results indicate that the BRODO method with the quantile index can save a lot of computational time with acceptable accuracy and can rationally cope with epistemic uncertainty.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 163545
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przedział ufności a błąd systematyczny pomiaru
Coverage interval and systematic effect
Autorzy:
Fotowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/156664.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niepewność pomiaru
measurement uncertainty
Opis:
Referat omawia zagadnienie randomizacji oddziaływani systematycznego do postaci zmiennej losowej. Oddziaływanie t traktowane jest jako część przedziału ufności związanego z wynikiem pomiaru. Przykładami takich oddziaływań najczęściej są błędy wskaza lub poprawki. Przedstawiono prostą i praktyczną metodę randomizacji.
The paper concerns the problem of treatment of the systematic effect as a random variable. This systematic effect is a part of the coverage interval of a measurement result. The simple randomization of a known systematic error as a bias or correction is presented. It is useful in practical metrological application.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 29-30
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of uncertainty on capital structure
Autorzy:
Wennie, Wennie
Nugroho, Vina C
Powiązania:
https://bibliotekanauki.pl/articles/18104683.pdf
Data publikacji:
2023-09-28
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Zarządzania i Finansów
Tematy:
target leverage ratio
uncertainty
Opis:
The purpose of this study is to determine the effect of uncertainty on the capital structure of public listed companies in Indonesia. This study used asset volatility as a method of measuring uncertainty. The researchers use unbalanced panel data from 2009 to 2019 in order to assess and analyse the effect of uncertainty on the company‘s capital structure. The results of this study indicate a positive relationship between uncertainty and the company‘s target leverage.
Źródło:
Journal of Management and Financial Sciences; 2023, 47; 71-86
1899-8968
Pojawia się w:
Journal of Management and Financial Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szacowanie niepewności pomiarów
Determination of uncertainty in measurements
Autorzy:
Terenowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/234527.pdf
Data publikacji:
2010
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
niepewność pomiaru
results uncertainty
Opis:
Wyznaczanie niepewności pomiaru jest konieczną częścią każdej procedury pomiarowej. W referacie omówiono klasyczne metody wyznaczania niepewności pomiaru. Wskazano na znaczenie walidacji procedur pomiarowych, analizy źródeł błędów przypadkowych i sposobu ich opracowania w zależności od rozkładu prawdopodobieństwa. Przedstawiono sposób wyznaczania niepewności standardowej przy pomiarach bezpośrednich i pośrednich, budżet niepewności oraz uwagi związane z wyborem współczynnika rozszerzenia k przy wyznaczaniu niepewności rozszerzonej.
Determination of measurement uncertainty, is obligatory part of each measurement procedure. In this paper, classical methods on determination of measurement uncertainty, were discussed. It was pointed to importance of validation in measurement procedures, analysis of sources of random errors and manner of their development in dependence on probability distribution. A way of determination of standard uncertainty in direct and indirect measurements, uncertainty budget and notes connected with selection of extension factor k at determination of extended uncertainty were presented.
Źródło:
Problemy Techniki Uzbrojenia; 2010, R. 39, z. 115; 77-84
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relational capital for managing the uncertainty of the environment
Autorzy:
Lenart, R.
Powiązania:
https://bibliotekanauki.pl/articles/348077.pdf
Data publikacji:
2015
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
relational capital
uncertainty
environment
Opis:
The article is an attempt to show the essence of relational capital in the context of the environmental uncertainty. The problem is all the more important that, on the one hand, the uncertainty is a challenge for representatives of management sciences, on the other hand, it is an immanent feature of any business activity. There is a necessity to search for a remedy for the lack of information needed to make decisions and the inability to predict effects of the decisions taken. The aim of this article is to present the current theoretical achievements in terms of the essence of relational capital in the context of the uncertainty of the environment. The article is divided into three parts. The first of them is devoted to the essence of the environmental uncertainty. The second part concerns the nature of relational capital from the perspective of the resource approach. The third part is an attempt to present the essence of relational capital in the context of the environmental un-certainty. There are indicated capabilities of managing the uncertainty of the environment, which can be achieved through relational capital. The literature shows the deficit of scientific research (theoretical and empirical) referring to relational capital in the context of the uncertainty. Moreover, the existing acquis comprises interesting cognitive gaps which , when filled in, should contribute to a deeper understanding of relational capital versus the uncertainty of the environment - which is going to be the subject of the author's further research.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2015, 1; 58-68
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Institutions: Uncertainty in Definition of the Term. A Brief Look at the history: 1890-1930
Autorzy:
Arnania-Kepuladze, Tamila
Powiązania:
https://bibliotekanauki.pl/articles/517417.pdf
Data publikacji:
2014
Wydawca:
Instytut Badań Gospodarczych
Tematy:
institution
behaviour
uncertainty
definition
Opis:
: Despite the fact that the significance of institutional economics is commonly recognized, the uncertainty of basic concepts of institutional economics – institutions – and its investigation sphere is widely mentioned today. The paper aims to trace the process of evolution in the understanding of the notion of institution, from its spontaneous mentions and pragmatic use of the so-called pre-institutional era to the desire to understand and to define the essence of the institution in the period of early institutionalism. Based on the analyses of appropriate literature, the paper tries to study how the term “institution” was understood at the three initial historical period of its usage. For this purpose, the first part of the paper analyses how the term “institu-tion” was used at the start by religious figures in VII and XIII centuries and then by thinkers in XVII-XVIII centuries which are considered as a pre-history of the term “institution” wide usage. The second part of the study is focused on the investigation how the term was understood by immediate predecessors of institutional economics – German Historical School, and the third part of the paper investigates scholars-institutionalists’ efforts in the intellectual context on the period 1890-1930.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 4; 79-102
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective geometric programming problem under uncertainty
Autorzy:
Mandal, W. A.
Islam, S.
Powiązania:
https://bibliotekanauki.pl/articles/406405.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
uncertainty theory
uncertain variable
linear
normal
zigzag
uncertainty distribution
multiobjective geometric programming
Opis:
Multiobjective geometric programming (MOGP) is a powerful optimization technique widely used for solving a variety of nonlinear optimization problems and engineering problems. Generally, the parameters of a multiobjective geometric programming (MOGP) models are assumed to be deterministic and fixed. However, the values observed for the parameters in real-world MOGP problems are often imprecise and subject to fluctuations. Therefore, we use MOGP within an uncertainty based framework and propose a MOGP model whose coefficients are uncertain in nature. We assume the uncertain variables (UVs) to have linear, normal or zigzag uncertainty distributions and show that the corresponding uncertain chance-constrained multiobjective geometric programming (UCCMOGP) problems can be transformed into conventional MOGP problems to calculate the objective values. The paper develops a procedure to solve a UCCMOGP problem using an MOGP technique based on a weighted-sum method. The efficacy of this procedure is demonstrated by some numerical examples.
Źródło:
Operations Research and Decisions; 2017, 27, 4; 85-109
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Obliczanie niepewności wyników pomiarów pośrednich w wybranych przypadkach szczególnych
Uncertainty calculation of the indirect measurement result in some particular cases
Autorzy:
Skubis, T.
Powiązania:
https://bibliotekanauki.pl/articles/156132.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niepewność standardowa
niepewność złożona
transfer Hamona
standard uncertainty
combined uncertainty
Hamon transfer
Opis:
W artykule przedstawiono model obliczenia niepewności złożonej w przypadku funkcji o zerowych wrażliwościach I rzędu albo o silnie nieliniowym równaniu, gdy składniki niepewności zależne od wrażliwości wyższych rzędów mają istotny wpływ na niepewność złożoną. Uogólnienie modelu zachowuje ogólną ideę składania niepewności. Polega ono na uwzględnieniu różniczek wyższych rzędów, które należy traktować jak inne składniki niepewności. Niepewność złożona jest średnią kwadratową tych wszystkich składników. Zwrócono uwagę na uniknięcie problemu skorelowania składników niepewności, jaki powstaje gdy niektóre skłądniki są podzielone na części ułamkowe i występują pod znakiem sumy wielokrotnie. Jako przykłady zastosowania metody przedstawiono transfer Hamona, którego funkcja ma zerowe wrażliwości I rzędu, oraz wielomian wyższego rzędu, dla ktorego w pewnych punktach różniczki zależne od wrażliwości II rzędu mają wartości porównywalne z różniczkami I rzędu.
A model for the calculation of the combined uncertainty in the case of function characterized by zero value sensitivities of 1st order or by strong non-linearity, when component uncertainties depended of higher order sensitivities have substantial effect into combined uncertainty therr is presented in the paper. Generalization of the model applies the main idea of the combined uncertainty calculation. the generalization depends on taking into account higher order differentials. these should be similarly to the other uncertainty components. The combined uncertainty there equal to the rms value of the all function uncertainty components. the attention there is paid into correlation of the uncertainty components, when of them there are divided into fractional parts, and then appear several times under sum denotation. The Hamon transfer there is analysed as an example. Both 1st order sensitivities of its function there are equal to the 0. The second specific function is a polynomial of higher order, when in specific points the differentials depended on the second order sensitivities have the same order values as 1st order differentials.
Źródło:
Pomiary Automatyka Kontrola; 2005, R. 51, nr 2, 2; 21-23
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe wymiary niepewności jednostkowej i społecznej w pandemii
New Dimensions of Individual and Societal Uncertainty During the Pandemic
Autorzy:
Kotlarska-Michalska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/13925565.pdf
Data publikacji:
2023-06-21
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
individual uncertainty
social uncertainty
sense of social safety
dimensions of uncertainty
niepewność jednostkowa
niepewność społeczna
ryzyko
poczucie bezpieczeństwa społecznego
wymiary niepewności
Opis:
This article provides an overview and shows new dimensions of individual and social uncertainty, the existence of which was empirically confirmed in the first year of the pandemic, or in other words during a period of particular intensification of fears and anxieties. The first part of the article reviews various approaches to the state of uncertainty from sociological, psychological and social policy perspectives. In the second section, selected uncertainty indicators are presented, confirming the thesis that the COVID-19 pandemic caused an increase in fears and concerns in several dimensions at the same time. The findings of sociological research on selected social categories and the results of surveys conducted by CBOS (the Public Opinion Research Center) were used for this.
Źródło:
Kultura i Społeczeństwo; 2023, 67, 2; 11-36
2300-195X
Pojawia się w:
Kultura i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metrological Analysis of Precision of the System of Delivering a Water Capsule for Explosive Production of Water Aerosol
Autorzy:
Śmigielski, G.
Toczek, W.
Dygdała, R.
Stefański, K.
Powiązania:
https://bibliotekanauki.pl/articles/221553.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
water capsule airdrop control system
uncertainty analysis
GUM uncertainty framework
propagation of distributions
Opis:
In this paper precision of the system controlling delivery by a helicopter of a water capsule designed for extinguishing large scale fires is analysed. The analysis was performed using a numerical method of distribution propagation (the Monte Carlo method) supplemented with results of application of the uncertainty propagation method. In addition, the optimum conditions for the airdrop are determined to ensure achieving the maximum area covered by the water capsule with simultaneous preserving the precision level necessary for efficient fire extinguishing.
Źródło:
Metrology and Measurement Systems; 2016, 23, 1; 47-58
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Approach to the Uncertainty Assessment of Acoustic Effects in the Environment
Autorzy:
Batko, W.
Pawlik, P.
Powiązania:
https://bibliotekanauki.pl/articles/177204.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
interval arithmetic
uncertainty
railway noise
Opis:
The acoustic climate assessment needed for the selection of solutions (technical, legal and organisa- tional), which will help to minimise the acoustic hazards in the analysed areas, is realised on the basis of acoustic maps. The reference computational algorithms, assigned to them, require very thorough prepa- ration of input data for the considered noise source model representing – in the best possible way – the acoustic climate. These input data are burdened with certain uncertainties in this class of computational tasks. The uncertainties are related to the problem of selecting proper argument values (from the inter- val of their possible variability) for the modelled processes. This situation has a direct influence on the uncertainty of acoustic maps. The idea of applying the interval arithmetic for the assessment of acoustic models uncertainty is formulated in this paper. The computational formalism assigned to the interval arithmetic was discussed. The rules of interval estimations for the model solutions determining the sound level distribution around the analysed noise source – caused by possible errors in the input data – were presented. The application of this formalism was illustrated in uncertainty assessments of modelling acoustic influences of the railway noise linear source on the environment.
Źródło:
Archives of Acoustics; 2012, 37, 1; 57-61
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions of the decision-making process
Autorzy:
Ścibiorek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/348119.pdf
Data publikacji:
2017
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
decision
risk
uncertainty
information
determinants
Opis:
In the article it has been emphasized, without analyzing the problematic situation, that making decision is becoming an increasingly complex process. This is influenced by many factors, mainly the dynamism of changes taking place and the significant impact of the environment. Information is essential to take correct and effective decisions. It is not always certain (reliable). Uncertainty and risk accompany decision makers and the point is that the decisions are adequate to the ensuing situation and create realistic determinants for achieving objectives – the implementation of the planned tasks. Interdisciplinary knowledge and high competences of persons making resolutions of complex decision problems are indispensable.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 4; 249-271
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena konsekwencji kryzysu pandemicznego COVID-19 w sektorze polskich przedsiębiorstw
Assessment of the consequences of the COVID-19 pandemic crisis in the enterprise sector in Poland
Autorzy:
Janecki, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/2194771.pdf
Data publikacji:
2022
Wydawca:
Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:
confidence index
COVID-19
uncertainty
Opis:
The aim of the study is to analyse the impact of the COVID-19 pandemic on the situation of enterprises in Poland. For this purpose, the results of the CSO surveys were used (the impact of the COVID-19 pandemic on the economic situation), conducted from April 2020 to December 2021. The results of the research indicate a clear differentiation of the situation among enterprises in the analysed period. The problems caused by the pandemic were particularly pronounced among service companies in the accommodation and catering sector, retailers in the textile, clothing and footwear sector, and in the specialist construction sector companies. Moreover, in most cases, within a given problem caused by the pandemic, it was the smaller enterprises that indicated the existence of threats more often.
Źródło:
Studia BAS; 2022, 1(69); 49-68
2080-2404
2082-0658
Pojawia się w:
Studia BAS
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the load on the hardness
Autorzy:
Petrik, J.
Palfy, P.
Powiązania:
https://bibliotekanauki.pl/articles/220458.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hardness
load
calibration
uncertainty
MSA
Opis:
The objective of the submitted paper is to analyze the influence of the load on the calibration of micro-hardness and hardness testers. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness in calibration of micro-hardness testers cannot be explained by Kick's Law (Meyer's index "n" is different from 2). The conditions of Kick's Law are satisfied at macro-hardness calibration, the values of "n" are close to 2, regardless of the applied load. The apparent micro-hardness increases with the increase of the load up to 30 g; the reverse indentation size effect (ISE) behavior is typical for this interval of the loads. The influence of the load on the measured microhardness is statistically significant for majority of calibrations.
Źródło:
Metrology and Measurement Systems; 2011, 18, 2; 223-234
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ensuring the flexibility and continuity of supplies in the B2B market
Autorzy:
Wieteska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/522060.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Continuity
Flexibility
Risk
Supply
Uncertainty
Opis:
Aim/purpose – The purpose of this paper is to recognize and compare the best practices that ensure the flexibility and continuity of supplies. Although the flexibility drivers and continuity risk drivers, according to the literature, are actually the same, there is a lack of research articles on this aspect. Design/methodology/approach – A two-phase methodology design, based on the literature review and in-depth interviews, was used, and seven in-depth interviews with the representatives of manufacturing companies that operate in different sectors were conducted. Findings – Supply flexibility and continuity are presented in the literature, mainly as the responses to the business environmental events/changes that have already occurred. Nevertheless, the researched manufacturing companies recognize their use in terms of prevention as well. The researched enterprises use traditional ways of dealing with supply problems (alternative supplier, inventory buffers). They do not really connect ensuring supply continuity with long-term disruptions, but rather understand it as prevention of typical supply delays and quality problems. The respondents regard supplier flexibility not only as a way of responding to the forecasted demand changes but also to unexpected situations. The companies ensure supply continuity and supply flexibility using similar but not exactly the same strategies. For the reactive strategies, sourcing decisions are crucial, whereas for preventive strategies – it is supplier performance management. Research implications/limitations – The small number of conducted interviews is a limitation of performed research, however, some directions for future research can be noted. Apart from other implications described in the paper, it is deduced that sourcing flexibility positively influences supply continuity. Nevertheless, this hypothesis needs quantitative verification. Originality/value/contribution – The paper compares the issue of supply flexibility with the issue of supply continuity. For these two areas, it identifies common and individual strategies that are performed by researched companies in terms of prevention and reaction to risk and uncertainty.
Źródło:
Journal of Economics and Management; 2017, 29; 118-138
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UNCERTAINTY ANALYSES IN ALBPETROL COMPANY
Autorzy:
Mjeda, Blerta
Powiązania:
https://bibliotekanauki.pl/articles/453489.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
uncertainty
simulation
evaluation
forecasting
scenarios
Opis:
Large companies like Albpetrol often deal with big projects. The decision to invest is based on the evaluation of the project profitability. But how certain is the calculated profitability? What if the costs overrun during implementation of the project? What if the reservoir performance is less than estimated? And what if the project completion is delayed? The focus will be on how to make people more aware of the risks and uncertainties in economic evaluations and to show the influence of these uncertainties on the economic indicators. Economic evaluations in the oil industry are carried out with cash flow models. Traditionally, these evaluations are carried out with the estimated (most likely) set of parameters. Usually some parameters, such as project costs or reserves, are varied manually as ‘sensitivities’ to show the potential impact on profitability. In this report, it is proposed to treat the uncertainties by defining stochastic parameters with carefully specified supports based on inputs from discipline experts. In this manner a better insight is gained in the distribution of the project profitability. Some of the key uncertainties in oil and gas investments have been investigated in detail. Thinking in terms of scenarios will help to take better decisions (e.g. about field development concepts) that are robust against a range of scenarios.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2018, 19, 4; 411-418
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration performance investigation of an uncalibrated indigenous artefact probing for five-axis machine tool
Autorzy:
Rahman, M. M.
Mayer, R.
Powiązania:
https://bibliotekanauki.pl/articles/99523.pdf
Data publikacji:
2016
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
machine tools
robustness
uncertainty
artefact
Opis:
On machine measurement of artefacts such as single ball, multiple balls or even prismatic shape artefact is gaining popularity for the calibration of five-axis machine tools. However, calibration results can be degraded due to errors from different process variables such as the measurement strategies, rotary axes indexations and artefact dismount and remount cycles. This research investigates the repeatability of uncalibrated indigenous artefact probing and machine tool error parameters calibration against a number of process variables. Uncertainties of the estimated parameters are estimated to quantify the calibration quality.
Źródło:
Journal of Machine Engineering; 2016, 16, 1; 33-42
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods for risk minimizing in the process of decision-making under uncertainty
Autorzy:
Guze, S.
Smolarek, L.
Powiązania:
https://bibliotekanauki.pl/articles/2069504.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
risk
optimization
decision process
uncertainty
Opis:
The sources of the uncertainty in the maritime transport system are described. Furthermore, the two models for human factor reliability are presented. The possibilities of mixed these two methods as the estimators for the probability of correct performance of the navigator are given. The analysis of decision-making process under uncertainty has been done. Finally, the optimization task and his possible solution are shown.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 123--128
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chosen problems of modelling engineering design process
Autorzy:
Kutschenreiter-Praszkiewicz, I.
Powiązania:
https://bibliotekanauki.pl/articles/117902.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
engineering design
fuzzy sets
uncertainty
Opis:
An overview of the various models for engineering design process was presented. General Design Theory, Basic Model, Real Design Model were described. Type-2 fuzzy sets implementation on engineering design process was described.
Źródło:
Applied Computer Science; 2006, 2, 2; 141-148
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty of the magnetic flux linkage measurements performed by modified current decay test
Autorzy:
Kowalik, Z.
Powiązania:
https://bibliotekanauki.pl/articles/141517.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
flux linkage measurements
modified current decay test
uncertainty of integral calculations
uncertainty of simplicial approximation
Opis:
The paper presents the estimation methodology for uncertainties of magnetic flux linkage measurements, when the flux linkage and current functions with respect to time are obtained instead of single values of these quantities. The computed uncertainties are then used to estimate the quality of an approximation of a current-flux characteristic in the mathematical model of an electrical machine when the approximation is based on the results of measurements.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 643-653
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ niepewności odczytu z wzorcowanego przyrządu na niepewność jego wzorcowania
Influence of the uncertainty of read-out with the calibrating meter in its the calibration uncertainty
Autorzy:
Lisowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/157366.pdf
Data publikacji:
2006
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wzorcowanie przyrządów
niepewność wzorcowania
niepewność odczytu
calibration of meters
calibration uncertainty
uncertainty of read-out
Opis:
Celem wzorcowania przyrządów pomiarowych jest wyznaczenie ich błędów wskazań. Niepewność przyrządu wzorcowego i niepewność odczytu z przyrządu wzorcowanego są głównymi źródłami niepewności wzorcowania. Ta niepewność odczytu jest często pomijana podczas oceny niepewności wzorcowania, a przeważnie ma ona największy udział w bilansie niepewności. Na te problemy zwrócono szczególną uwagę.
Delimitation of indications errors is the aim of calibration of the measuring instruments. The uncertainty of standard instrument and the uncertainty of read-outs with the calibrating meter are the main sources of calibration uncertainty. This uncertainty of read-out is often omitted during estimation of the calibration uncertainty, thought it has often the largest contribution in the balance of uncertainty. These problems are addressed with a special attention.
Źródło:
Pomiary Automatyka Kontrola; 2006, R. 52, nr 7/8, 7/8; 3-5
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wstęp: niepewność — normalność ponowoczesnego świata
Introduction: Uncertainty — the Normality of the Postmodern World
Autorzy:
Taranowicz, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/13925578.pdf
Data publikacji:
2023-06-21
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
uncertainty
risk
ontological uncertainty
individual in post-modernity
niepewność
ryzyko
ontologiczna niepewność
jednostka w ponowoczesności
Opis:
W analizach współczesnego społeczeństwa podkreśla się zmniejszającą się stabilność i przewidywalność warunków społecznych i zwiększającą się niepewność towarzyszącą jednostkom. Zgodnie z tradycją istniejącą w naukach społecznych niepewność związana jest z ryzykiem, jakie niesie podejmowanie decyzji i niemożność przewidzenia ich konsekwencji. Współcześnie ryzyko inaczej jest społecznie konceptualizowane niż w społeczeństwach tradycyjnych. Wiedza na jego temat i sposobów radzenia sobie nie ma związku z codziennym życiem jednostki i jej subiektywnie postrzeganym światem. Starając się zapanować nad ryzykiem  musi ona sięgnąć do wiedzy eksperckiej obcej jej doświadczeniu. Opisując warunki funkcjonowania jednostek w ponowoczesności niektórzy autorzy proponują pojęcie niepewności ontologicznej. Odnosi się ono do sytuacji obecności wielu schematów działania przy braku jednoznacznych wskazań, które z nich są tymi właściwymi. Jednostka zmuszona do przejęcia kontroli nad własną biografią i tożsamością pozbawiona jest jasnych wytycznych podpowiadających jej, jak powinna to robić. Rodzi to poczucie zagubienia  i niepewności.
Analyses of contemporary society emphasize the decreasing stability and predictability of social conditions and the increasing uncertainty accompanying individuals. According to the tradition that exists in the social sciences, uncertainty is related to the risk of making decisions and the impossibility of predicting their consequences. Risk is now conceptualized differently in society than in traditional societies. Knowledge about risk and how to deal with it is unrelated to an individual's everyday life and the individual's subjective perception of the world. In an attempt to manage risk, individuals have to resort to expert knowledge that is alien to their experience. Describing the conditions of functioning of individuals in post-modernity, some authors propose the concept of ontological uncertainty. This concept refers to the situation of the presence of many schemes of action in the absence of clear indications as to which of them is the correct one. An individual forced to take control over his own biography and identity is deprived of clear guidelines telling him how to do it. This creates a sense of confusion and uncertainty.
Źródło:
Kultura i Społeczeństwo; 2023, 67, 2; 3-10
2300-195X
Pojawia się w:
Kultura i Społeczeństwo
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Point-plane distance AS model for uncertainty evaluation of coordinate measurement
Autorzy:
Płowucha, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1849154.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
task specific uncertainty
uncertainty of coordinate measurement
measurement models
Type B evaluation
sensitivity analysis method
Opis:
The paper presents a detailed theoretical background for coordinate measurement uncertainty evaluation by means of Type B evaluation method, taking into account information on accuracy of a coordinate measuring system given with the formula for maximum permissible errors of length measurement and verification test results. A proposal for evaluation of the verification test results is made. A measurement model based on the point-plane distance equation is presented. A detailed analysis of the partial derivatives (sensitivity factors in an uncertainty budget) of the measurement model is presented. The analyses of measurement uncertainty for different geometrical characteristics were conducted using this measurement model. Examples of uncertainty evaluation for geometrical deviations are presented: position of a point related to a datum plane and flatness in the case of convex or concave surfaces. The examples include detailed uncertainty budgets.
Źródło:
Metrology and Measurement Systems; 2020, 27, 4; 625-639
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Regulations on Transparency of Spa & Wellness Market in Poland
Autorzy:
Mroczek-Czetwertyńska, Agnieszka
Czetwertyński, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/488842.pdf
Data publikacji:
2013
Wydawca:
Instytut Badań Gospodarczych
Tematy:
spa & wellness services
uncertainty of quality
Opis:
This paper focuses on the issue of spa & wellness services market transparency in the context of official regulations. The issue is significant, since the entire tourism sector in Poland is generally regulated to a great extent. It concerns, among others, the categories of tourist resorts and the standard of rendered services. Detailed regulations, however, do not cover spa & wellness services, which have been relatively new form of spending free time. No standards on one hand, and no relevant regulations on the other result in this market being characterized by a serious quality span depending on particular service providers. The goal of this paper is an examination of the thesis that no uniform national regulation of the Polish spa & wellness market is a reason for poor market transparency resulting from information asymmetry which, in turn, results from quality uncertainty. The theoretical thoughts have been proven by the authors' surveys focused on the shape of the spa & wellness services market in the Dolny Śląsk area. The first part of the paper presents a theoretical background of the issue related to uncertainty of the quality, information asymmetry and finally – the market transparency. The next part of the paper is focused on the Polish spa & wellness market and it comprises an analysis of the effects caused by poor transparency of the market. Another part reveals the regulations of the tourism market and proves that no uniform regulations pertaining to spa & wellness services makes that the remain-ing legislation ineffective in the field of shaping high-quality services. The last part of the paper deals with self-regulation of the spa & wellness market and reasons for the insufficient efficiency.
Źródło:
Oeconomia Copernicana; 2013, 4, 4; 91-102
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tolerance of uncertainty and ambiguity of the situation and anxiety as a state and as a feature
Autorzy:
Bokuniewicz, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/628327.pdf
Data publikacji:
2020
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Tolerance of uncertainty
toleracne of ambiguity
Opis:
Aim. The aim of the undertaken research is to explain to what extent the tolerance of uncertainty and ambiguity of the situation is associated with anxiety as a state and with anxiety as a trait. Methods. The survey was conducted in electronic form with the aid of a form created on the Profitest.pl platform. The Uncertainty Tolerance Scale (own translation), COPE, STAI and Ambiguity tolerance scale were used. The examined variables were: coping with stress, feeling of anxiety as a state and anxiety as a trait (explained variables); uncertainty tolerance and ambiguity tolerance (explanatory variables). Results and conclusion. The research shows that people who feel anxious in uncertainty situations can absorb it and start using it as a trait. It was also noted that the greater the tolerance of uncertainty they have to reply to, the worse they cope in critical ambiguity situations. It has also been found that in order to overcome discomfort in difficult situations, people use equal coping strategies. Greater ambiguity tolerance allows participants to experience less stress. On the other hand, the lower the tolerance, the more often they reach for emotional and instrumental support and focus on emotions. Originality. Understanding the mediating processes related to the studied phenomenon may be of fundamental importance in the development of support systems promoting the improvement of mental functioning of people who have problems with quick adaptation to changes and in the creation of appropriate prevention programs aimed at helping these people.
Źródło:
Journal of Education Culture and Society; 2020, 11, 2; 224-236
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Planning and realization control of research projects
Autorzy:
Kuchta, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/639411.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
research project, project risk, project uncertainty.
Opis:
In the paper a new approach to research projects planning and management is proposed. It is substantially different from the traditional methods and resembles more the agile methods used in IT projects. It takes into account the much more greater dimension of uncertainty inherent to research projects as compared with other types of projects. It allows a project to be broken if the analysis shows that the benefit/cost relation does no longer justify the project continuation. The focus of the method lies on an generalized tasks description, consisting of a comprehensive list of undetermined, unknown or uncertain task attributes and task dependencies, with an explanation clarifying the nature or the cause of the lack of information/uncertainty. The description should be updated in the course of the project. The proposed approach is applied to a real world research project where a lot of changes were necessary and traditional project management methods proved to be inefficient.
Źródło:
Zarządzanie Publiczne; 2014, 2(26)
2084-3968
Pojawia się w:
Zarządzanie Publiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistyczny model wyniku pomiaru wartości chwilowej wielkości zmiennej w czasie
Probabilistic model of instantaneous value measurement result of varying in time quantity
Autorzy:
Jakubiec, J.
Powiązania:
https://bibliotekanauki.pl/articles/156154.pdf
Data publikacji:
2005
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sampling
quantizing
probabilistic error model
uncertainty
Opis:
W artykule rozpatrywane jest zagadnienie pomiaru wartości chwilowej wielkości zmieniającej się w czasie za pomocą toru pomiarowego składającego się z układu próbkująco/pamietającego oraz przetwornika A/C. Opisano sposób modelowania właściwości metrologicznych elementów toru oraz probabilistyczny model wyniku pomiaru uzyskiwanego na jego wyjściu. Przedstawiono metodę weryfikacji tego rodzaju modelu dla przypadku, gdy obejmuje on wiele źródeł błędu.
The paper characterizes the problem of instantaneous value measurement of a quantity varying in time by using a measuring chain consists of a Sample/Hold circuit and an AD converter. A method of metrological properties modeling of the chain elements and a model of measurement result obtained at the output of the chain has been presented. A verification method of such a kind model, for the situation when it contains many error sources, has been described.
Źródło:
Pomiary Automatyka Kontrola; 2005, R. 51, nr 2, 2; 28-31
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling in validation of the metrological software
Modelowanie w walidacji oprogramowania metrologicznego
Autorzy:
Nieciąg, H.
Powiązania:
https://bibliotekanauki.pl/articles/158005.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
walidacja
oprogramowanie
niepewność
validation
software
uncertainty
Opis:
In this paper we discuss the issues involving the validation of the CMM's metrological software. We consider the concept of validation and their realisation based on conceptual and formal model of software under examination. Discussed method, checking the software against the basic parameters of accuracy, replaces the key concept measurement experiments and complements the concept of PN-EN ISO 10360 - 6 tests.
W artykule zostały omówione zagadnienia dotyczące walidacji oprogramowania metrologicznego współrzędnościowych maszyn pomiarowych. Przedstawiono strategię walidacji oprogramowania oraz sposób jej realizacji w oparciu o ustalony konceptualny i formalny model. Stosunkowo prosta komputerowa implementacja modelu pozwala na przeprowadzanie badań oraz wykorzystanie ich wyników do prognozowania zachowań oprogramowania.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 12, 12; 48-50
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methodologies to assess uncertainties in the tritium production within lithium breeding blankets
Autorzy:
Salvador, J.
Cabellos, O.
Díez, C. J.
Powiązania:
https://bibliotekanauki.pl/articles/147864.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
uncertainty
nuclear data
lithium breeding blankets
Opis:
Tritium would have to be produced and controlled in the future fusion facilities. The capture of fusion neutrons by lithium has been proposed as a possible tritium reproduction reaction and lithium blankets for tritium breeding based on this reaction were designed. For the purpose of plant operation and for the safety reasons it is necessary to assess the accuracy with which we can predict the amount of tritium that can be produced. In particular, it is important to assess the impact that the uncertainties inherent in the nuclear data have on the prediced values. By focusing on specific applications and finding specific deficiencies, such studies point to possible directions to improve nuclear data sources. In this paper experimental data on tritium production in a mock-up system are reproduced and their uncertainties assessed in order to identify the reactions that have largest contributions to the total uncertainty.
Źródło:
Nukleonika; 2012, 57, 1; 61-66
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The challenges of concept Multi-Echelon Inventory Management
Autorzy:
Czwajda, L.
Kosacka, M.
Powiązania:
https://bibliotekanauki.pl/articles/409375.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
supply chain
risk
uncertainty
inventory management
Opis:
The increasing complexity of supply chains and the dynamic development of information technology result in the increased interest of the Multi-Echelon - Inventory - Management concept. Although the concept is well - known in the last decade worldwide, in Poland the concept is still not enough explored. This paper presents the supply chain from the perspective of Multi-Echelon - Inventory - Management concept realization. The basis for the concept is to optimize the inventory level in the entire supply chain, what is considerably more difficult than managing it in a single-echelon. The main contribution of this paper is to introduce main challenges of multilevel systems and determine the classification of risks and sources of uncertainty in the entire supply chain.
Źródło:
Research in Logistics & Production; 2017, 7, 5; 417-429
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Critical Realist Perspective on Decisions Involving Risk and Uncertainty
Autorzy:
Ranyard, Rob
Powiązania:
https://bibliotekanauki.pl/articles/430361.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
decision making
critical realism
risk
uncertainty
Opis:
The relevance to decision research of recent advances in the philosophy of social science is considered. The critical realism of Roy Bhaskar argues for the identification of contextually contingent explanatory mechanisms at multiple levels based on concepts grounded in intersubjectively shared reality. Using examples from the author’s and other’s research on the psychology of decisions involving risk and uncertainty, this paper explores the implications of taking a critical realist approach. It is argued that critical realism has the potential to advance and unify disparate experimental and naturalistic lines of research. Furthermore, a diverse range of experimental, process-tracing and observational methods can play important complementary roles in developing fruitful critical realist explanations of decisions involving risk and uncertainty.
Źródło:
Polish Psychological Bulletin; 2014, 45, 1; 3-11
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monetary Policy and House Price Volatility
Autorzy:
Wesołowski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2075308.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
monetary policy
house prices
model uncertainty
Opis:
House prices are of special importance for monetary policy since their sudden falls are usually associated with credit crunch followed by long-lasting and painful recessions. Despite several spectacular episodes of such events, each time house prices exhibit long-lasting growth trend with little volatility around it, it is argued that this pattern is a “new normal”. This paper shows that a central bank following this view would increase the volatility of inflation and output as compared to a policy that assumes high volatility of house prices. In the former case the monetary authority would conduct too accommodative monetary policy during abrupt house price expansions significantly increasing output and inflation fluctuations. In the latter situation, in turn, the policy would work well irrespective of the realized house price volatility
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2021, 4; 359-379
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Applicability of Flow Averaging Pitot Tubes in the Areas of Flow Disturbance
Autorzy:
Pochwała, S.
Pospolita, J.
Powiązania:
https://bibliotekanauki.pl/articles/221838.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
averaging Pitot tubes
flowmeter
measurement uncertainty
Opis:
The issues connected with the complex design of various facilities, including up-to-date boiler equipment as well as the ways of organizing the space around them, are the reasons why there is often a lack of room for mounting a flowmeter in accordance with the recommendations of manufacturers. In most cases the problem is associated with ensuring sufficient lengths of straight pipe leading into and out of a flowmeter. When this condition cannot be fulfilled, the uncertainty of measurement increases above the value guaranteed by the manufacturer of the flowmeter. This sort of operation problem has encouraged the authors of this paper to undertake research aimed at the analysis of applicability of averaging Pitot tubes in the areas of flow disturbance.
Źródło:
Metrology and Measurement Systems; 2016, 23, 1; 71-84
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of uncertainty and risk as a subject of research of the Nobel Prize Laureates in Economic Sciences
Autorzy:
Bąk, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/522493.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Economic sciences
Nobel Prize
Risk
Uncertainty
Opis:
Aim/purpose – The main aim of the present paper is to identify the problem of uncertainty and risk in research carried out by the Nobel Prize Laureates in Economic Sciences and its analysis by disciplines/sub-disciplines represented by the awarded researchers. Design/methodology/approach – The paper rests on the literature analysis, mostly analysis of research achievements of the Nobel Prize Laureates in Economic Sciences. Findings – Studies have determined that research on uncertainty and risk is carried out in many disciplines and sub-disciplines of economic sciences. In addition, it has been established that a number of researchers among the Nobel Prize laureates in the field of economic sciences, take into account the issues of uncertainty and risk. The analysis showed that researchers selected from the Nobel Prize laureates have made a significant contribution to raising awareness of the importance of uncertainty and risk in many areas of the functioning of individuals, enterprises and national economies. Research implications/limitations – Research analysis was based on a selected group of scientific research – Laureates of the Nobel Prize in Economic Sciences. However, thus confirmed ground-breaking and momentous nature of the research findings of this group of authors justifies the selective choice of the analysed research material. Originality/value/contribution – The paper includes a selection of research achievements in uncertainty and risk of the Nobel Prize Winners in Economic Sciences previously not presented in scientific papers.
Źródło:
Journal of Economics and Management; 2020, 39; 21-40
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the coordinate measuring systems accuracy
Autorzy:
Sladek, J.
Gaska, A.
Powiązania:
https://bibliotekanauki.pl/articles/99798.pdf
Data publikacji:
2016
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
coordinate measuring systems
modelling
uncertainty
accuracy
Opis:
Coordinate metrology determines nowadays the relevant directions of development in automated measuring systems and quality management in the field of machine industry. The essential problem of coordinate measuring technique application is the issue of accuracy assessment of performed measurements. This paper describes the development of coordinate systems modelling as a new field of assessing the accuracy of measurements carried out in a quasi-real time. The practical solutions of the so-called virtual machines and virtual measuring systems were described along with the results of their evaluation and validation methodology based on a comparison of obtained results with the results produced by the typical methods of coordinate measurements accuracy assessment.
Źródło:
Journal of Machine Engineering; 2016, 16, 3; 34-46
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of environmental uncertainty on tax avoidance with corporate governance as a moderator
Autorzy:
Felia, Donelia
Sambuaga, Elfina Astrella
Powiązania:
https://bibliotekanauki.pl/articles/18104680.pdf
Data publikacji:
2023-09-28
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Zarządzania i Finansów
Tematy:
corporate governance
tax avoidance
environmental uncertainty
Opis:
The study aims to examine the effect of environmental uncertainty on tax avoidance and the moderating effects of corporate governance. Data collection uses secondary data derived from the financial statements and annual reports of companies listed on the Indonesia Stock Exchange for the period of 2017–2019, using the S&P Capital IQ database. The population of this study consists of 80 companies with an observation period of 3 years. Thus, the total of research observations is 240, obtained by the purposive sampling method. The results showed that environmental uncertainty negatively affects tax avoidance. The indicators of corporate governance, which is an independent board of commissioners, can strengthen the relationship between environmental uncertainty and tax avoidance, while audit quality is proven to weaken the relationship between environmental uncertainty and tax avoidance.
Źródło:
Journal of Management and Financial Sciences; 2023, 47; 51-69
1899-8968
Pojawia się w:
Journal of Management and Financial Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrated framework for safety management and uncertainty management in petroleum operations
Autorzy:
Bjorheim, A. E.
Terje, A.
Sæbøe, I. R.
Powiązania:
https://bibliotekanauki.pl/articles/2069701.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
safety management
uncertainty management
petroleum operations
Opis:
In petroleum operations, the safety management and the uncertainty management have traditionally been completely separated functions. The two disciplines are to large extent based on different scientific pillars and it has been difficult to obtain an integrated approach. However, the recent introduction of risk perspectives highlighting the uncertainty component of risk has provided an improved basis for development of such an approach. By seeing risk as the two-dimensional concept covering events and consequences on the one hand side and uncertainties on the other, the content and boundaries of risk assessments are changed. The gap between the two disciplines can to large extent be bridged. The purpose of the present paper is to present and discuss an integrated framework for these disciplines and traditions, based on this risk perspective. An example is included to show the practical implications of the framework.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 1; 1--8
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental evaluation of dynamic properties of the four electrode reference conductivity cells
Autorzy:
Mikhal, A. A.
Warsza, Z. L.
Gavrylkin, V. G.
Powiązania:
https://bibliotekanauki.pl/articles/114164.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
primary conductivity standard
cell dynamics
uncertainty
Opis:
Dynamic properties of the four-electrode cell with conducting liquid inside are described in the paper. The cell is used as a sensor of the electrolytic conductivity (EC) in the national Ukrainian standard. Electrical model and physical model for the temperature changes of this sensor are presented. To avoid additional measurement errors the stable state in desired temperature should be obtain. To obtain values of parameters describing the dynamic process of EC cell for temperature changes the experimental way was chosen. Installation and measurement procedure is presented. It is found that temperature transition process in the EC cell can be modeled by the first order differential equation and depends mainly on two cell tubes. For establishing the cell temperature within an error less then 0.002ºC time 36 min is needed.
Źródło:
Measurement Automation Monitoring; 2015, 61, 10; 456-459
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement Uncertainty In Algorithms Using PCA Method
Autorzy:
Augustyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/114502.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
PCA method
uncertainty analysis
measurement algorithm
Opis:
Propagation analysis of selected uncertainty sources in algorithms using the PCA method has been presented. The paper shows uncertainty analysis in algorithms, which use minimization of squared distances technique and maximizing the variance technique. On the basis of simulation tests the influence of the used signal sampling technique on the eigenvalues vector for the sinusoidal signal containing additive white noise, has been compared. Three applied sampling techniques have been analyzed: synchronization of the beginning of the data acquisition, for the successive sequences xi, immediately after a positive zero-level crossing of the analyzed waveform; separation of the NM-element sequence x to M of N-element sequences xi collected sequentially in subsequent rows of the matrix X; and application of sampling with the fractional delay of d=Ts/2, and X matrix construction from alternating strings: x2i-1 - sampled with a delay of d, and x2i - sampled with a zero delay from the moment of the zero crossing by analyzed waveform.
Źródło:
Measurement Automation Monitoring; 2015, 61, 11; 494-497
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical Model of Uncertainty of Ships Safety Maneuvering Area Determination
Autorzy:
Montewka, J.
Powiązania:
https://bibliotekanauki.pl/articles/320567.pdf
Data publikacji:
2008
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
bezpieczne manewrowanie
niepewność
safety maneuvering
uncertainty
Opis:
The paper presents uncertainty model of the original method based on optoelectronic measurements used for ship's safety maneuvering area determination. The method takes advantage of land borne laser rangefinder and encoder measurements. The results obtained from the method are compared with results obtained from GNSS RTK method and the uncertainty model is evaluated and implemented.
Źródło:
Annual of Navigation; 2008, 13; 75-86
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and Decline of Assets: On Biased Judgments of Asset Accumulation and Investment Decisions
Autorzy:
Gonzalez, Nichel
Svenson, Ola
Powiązania:
https://bibliotekanauki.pl/articles/430466.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
investment decisions
discounting
uncertainty
growth
decline
Opis:
Previous research showed that accumulations of capital following stationary interest rates are underestimated by human judges. Hyperbolic discounting was suggested as a descriptive and explanatory model for this phenomenon. First, we investigated judged accumulated capital after a period of annual growth and decline. The degree of underestimation increased with accumulated growth and the results supported hyperbolic discounting as a descriptive model on the group level. However, the hyperbolic model did not apply to the data for one third of the participants. Second, we investigated how investment decisions were related to capital accumulation before the investments and to judgments of the possible outcomes of the future investments. To our surprise, the participants’ judgments of expected future accumulated capital did not add predictive power to predictions based on whether there was growth or decline before the investment decision. Unfortunately this strategy leads to suboptimal investment decisions.
Źródło:
Polish Psychological Bulletin; 2014, 45, 1; 29-35
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Społeczna niepewność jako bariera wdra- żania innowacji - przykład biopaliw w Polsce
Social uncertainty as a barrier to innovation implementation – the case of the Polish biofuel sector
Autorzy:
Woźniak-Malczewska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/419953.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
innovation
social uncertainty
biofuels
innovation implementation
Opis:
Barriers to innovation implementation can be such factors that hinder, delay or entirely prevent the innovation process. The study of social uncertainty as a barrier to innovation implementation has been carried out on the basis of a case study of the biofuel sector in Poland. The goal of the article is to indicate that one of the development barriers of the Polish biofuel sector may be social uncertainty. Firstly, it describes chosen innovation barriers. Secondly, it explains uncertainty and defines social uncertainty. Thirdly, it briefly points to the situation of the biofuel sector in Poland, emphasising the problems of social acceptance. Finally, research findings are presented, showing that young adults in Poland declare a positive attitude towards biofuels but are less willing to actually purchase biofuels themselves.
Źródło:
Nauki o Zarządzaniu; 2016, 1(26); 166-182
2080-6000
Pojawia się w:
Nauki o Zarządzaniu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robot Grasp Synthesis Under Object Pose Uncertainty
Autorzy:
Szynkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/950999.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
grasp synthesis
pose uncertainty
grasp quality
Opis:
This paper addresses the problem of grasp synthesis for grasping objects considering both object pose uncertainty and object dynamics. These two factors greatly affect success or failure in a real-world robotic grasping and should be considered simultaneously. The proposed approach is based on simulation of grasping process assuming that the 3D model of the object is known. Object geometry is modelled using superquadrics. To evaluate grasp quality three different measures are utilised. The proposed grasp synthesis approach will be implemented and tested on a real robot with multi-fingered hand.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2015, 9, 1; 53-61
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Classification Of Scheduling Problems Under Production Uncertainty
Autorzy:
Wojakowski, P.
Warżołek, D.
Powiązania:
https://bibliotekanauki.pl/articles/409534.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
scheduling problem
production uncertainty
production disruption
Opis:
One of the most important issue regarding scheduling problem is production uncertainty. From the standpoint of real-world scheduling problem, it is necessary to find solution of building the schedule which can be insensitive to production disruptions such as machine breakdowns, incorrectly estimated time interval of machines maintenance, absence of workers, unavailability of materials or tooling, production defects, variable processing times, etc. This research study is conducted to answer the question: how the researchers cope with the problem of production uncertainty taking into account the scheduling problem? Our investigation focuses on approaches developed for scheduling with production uncertainty consideration. Among these approaches the most popular ones are: reactive scheduling, proactive scheduling, predictive scheduling and robust predictive-reactive approaches. A brief explanation of individual approaches are presented. Further, models of uncertainty used in scheduling approaches are highlighted.
Źródło:
Research in Logistics & Production; 2014, 4, 3; 245-256
2083-4942
2083-4950
Pojawia się w:
Research in Logistics & Production
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie niepewności aproksymacji wyników pomiaru algebraicznymi oraz ortogonalnymi wielomianami Czebyszewa
Comparison of measurement result approximation uncertainty by algebraic and orthogonal Chebyshev polynomials
Autorzy:
Dorozhovets, M.
Powiązania:
https://bibliotekanauki.pl/articles/158031.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niepewność
aproksymacja
wielomiany
uncertainty
approximation
polynomials
Opis:
W referacie zaprezentowano wyniki porównania niepewności przewidywanych wartości funkcji znalezionych na podstawie aproksymacji wyników pomiaru zwykłymi algebraicznymi oraz ortogonalnymi wielomianami Czebyszewa. Przedstawione są wzory analityczne do obliczenia niepewności tych funkcji.
In the paper the comparison results of the uncertainty of the forecasted values of function, obtained as a result of the measurement result approximation by both usual algebraic and Chebyshev polynomials are presented. The obtained formulas for calculation uncertainty of these function are presented.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 12, 12; 21-24
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzorcowanie akcelerometrów z wykorzystaniem losowych przebiegów pobudzających
Calibration of accelerometers using random excitation
Autorzy:
Buchczik, D.
Ryba, A.
Powiązania:
https://bibliotekanauki.pl/articles/155966.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
wzorcowanie
niepewność
akcelerometry
calibration
uncertainty
accelerometers
Opis:
W pracy została omówiona metoda wzorcowania akcelerometrów z wykorzystaniem losowych przebiegów pobudzających. Zaproponowano również procedurę szacowania niepewności wyznaczonych charakterystyk. Najważniejszą zaletą metody jest bardzo krótki czas trwania eksperymentu pomiarowego. Oszacowane niepewności wzorcowania sięgają kilkunastu procent. Metoda może być stosowana, gdy konieczne jest szybkie sprawdzenie charakterystyk czujnika, a niepewność wyników ma znaczenie drugorzędne.
A method for accelerometer calibration with the use of random excitation is presented in this paper. Amplitude and phase characteristics are determined based on the evaluation of power spectral density and cross power spectral density of input and output signals. A random signal with characteristics of white noise is used in calibration. Evaluation of the uncertainty of the results is determined when taking into consideration components type A and B. Vibration calibration with the use of an electromagnetic vibration exciter, as shown in Fig. 1, was applied in the investigations. The measuring system is very similar to the measurement system used in back–to–back comparison method. The DAQ board allows signal generation and measurement at a certain sampling rate for further processing in the frequency domain. The method was verified on a singleaxis piezoelectric sensor type PCB 338B35 and a biaxial capacitive accelerometer based on the ADXL 202. The frequency characteristics of the sensors determined are shown in Figs. 2-5. The most important advantage of the method is the very short duration of the measuring experiment. The relative expanded uncertainties of the calibration procedure reach several percent and are far greater compared to the values mentioned in the standard ISO 16063-21. The method can be used in situations in which it is necessary to quickly check the sensor characteristics, for example in the field for periodic maintenance of sensors mounted on the object.
Źródło:
Pomiary Automatyka Kontrola; 2014, R. 60, nr 8, 8; 544-447
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Political Parties’ Electoral Strategies in the Context of Political Uncertainty
Autorzy:
Wojtasik, Waldemar
Powiązania:
https://bibliotekanauki.pl/articles/514568.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Śląski. Wydział Nauk Społecznych
Tematy:
electoral strategies
political uncertainty
political manipulations
Opis:
Taking part in an election, political parties implement their planned strategic activities, which involve making choices regarding competitive goals and maximizing the usefulness of the resources they have. A significant context of party strategies is political uncertainty. The paper discusses the importance of political uncertainty in three areas. First, political uncertainty is an instrument affecting the character of political competition. In the second area, the article presents its role as a factor of competition in the process of campaigning for votes. It also points out that political uncertainty may be a mechanism of institutionalizing new political parties. Some of the implemented party strategies, influencing the level of political uncertainty, assume possible electoral manipulations.
Źródło:
Political Preferences; 2015, 11; 51-59
2449-9064
Pojawia się w:
Political Preferences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating the Approximation Uncertainty for Digital Materials Subjected to Stress Relaxation Tests
Autorzy:
Adamczak, S.
Bochnia, J.
Powiązania:
https://bibliotekanauki.pl/articles/220966.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
digital materials
stress relaxation
approximation uncertainty
Opis:
The main aim of the study was to determine the goodness of fit between the relaxation function described with a rheological model and the real (experimental) relaxation curves obtained for digital materials fabricated with a Connex 350 printer using the PolyJet additive manufacturing technology. The study involved estimating the uncertainty of approximation of the parameters of the theoretical relaxation curve. The knowledge of digital materials is not yet sufficient; their properties are not so well-known as those of metallic alloys or plastics used as structural materials. Intensive research is thus required to find out more about their behavior in various conditions. From the calculation results, i.e. the uncertainty of approximation of the relaxation function parameters, it is evident that the experimental curves coincide with the curves obtained by means of the solid model when the approximation uncertainty is taken into account. This suggests that the assumed solid model is well-suited to describe a real material.
Źródło:
Metrology and Measurement Systems; 2016, 23, 4; 545-553
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena niepewności modeli nośności elementów żelbetowych
The evaluation of uncertainty in the resistance models of reinforced concrete members
Autorzy:
Woliński, S.
Powiązania:
https://bibliotekanauki.pl/articles/390881.pdf
Data publikacji:
2013
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
nośność elementów żelbetowych
niepewność parametryczna
niepewność modelowa
współczynnik częściowy
ocena niepewności modelowej
resistance of RC elements
parameter uncertainty
model uncertainty
partial factors
model uncertainty assessment
Opis:
W pracy przedstawiono analizę i sposoby oceny niepewności modelowej nośności elementów żelbetowych. Sposób pierwszy opiera się na normowej procedurze kalibracji modeli nośności. Sposób drugi jest autorską propozycją oszacowania niepewności modelowej z wykorzystaniem dostępnych wyników badań doświadczalnych dotyczących zmienności nośności. Zgodnie z koncepcją metody częściowych współczynników jako miarę niepewności modelowej przyjęto wartość odpowiedniego współczynnika częściowego. Rozważania i propozycje przedstawione w pracy zilustrowano przykładem oceny niepewności modelu nośności na ścinanie strefy przypodporowej belki żelbetowej.
The paper presents the analysis and evaluation methods of uncertainty in the resistance models of reinforced concrete members. The first method is based on a standardized procedure for the calibration of resistance models given in the Eurocode. The second method is an original proposal for the evaluation of uncertainty in the resistance models using the available test data on resistance variation. According to the concept of semi-probabilistic partial factors design, the partial factor resulting from model uncertainty, separated from the factor of resistance, represents a measure of model uncertainty. The approach to model uncertainty evaluation is demonstrated with the use two different sample models for shear capacity assessment of reinforced concrete beams.
Źródło:
Budownictwo i Architektura; 2013, 12, 1; 203-210
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uogólniona niepewność zewnętrzna i wewnętrzna
General external and internal uncertainty
Autorzy:
Bombola, P.
Powiązania:
https://bibliotekanauki.pl/articles/399253.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
niepewność
ryzyko
decyzje menedżerskie
zarządzanie ryzykiem
zarządzanie niepewnością
uncertainty
risk
managerial decisions
risk management
uncertainty management
Opis:
W artykule przedstawiono kwestię niepewności zewnętrznej i wewnętrznej. Zaproponowano uproszczony model klasyfikujący niepewność w zależności od źródła jej pochodzenia oraz stopnia nasilenia tego zjawiska. Autor postuluje wykorzystywanie w praktyce zarządzania dostępnych metod i modeli naukowych, które pozwalają zniwelować częściowo występujące ryzyko i/lub niepewność, niezależnie od źródła jego pochodzenia. Dzięki temu możliwe jest podejmowanie lepszych decyzji menedżerskich obciążonych mniejszym ryzykiem lub niższym poziomem niepewności.
The paper discusses the topics of uncertainty and risk both in internal and external environments. A simple model which classifies uncertainty depending on its source and intensity is proposed. The author calls for the use of already well-established models and scientific methods which are expected to reduce the scale of uncertainty and risk. The higher quality of taken decisions is expected as a result.
Źródło:
Ekonomia i Zarządzanie; 2014, 6, 1; 127-141
2080-9646
Pojawia się w:
Ekonomia i Zarządzanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niepewność w zarządzaniu zasobami naturalnymi w kontekście instytucjonalnym
Autorzy:
Kuźniewski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/466405.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Naukowe Płockie
Tematy:
niepewność
zasoby naturalne
instytucjonalizm
zarządzanie niepewnością
kontekst instytucjonalny
uncertainty
natural resources
institutionalism
managing uncertainty
institutional context
Opis:
Niniejszy artykuł analizuje współczesne i klasyczne badania nad niepewnością w zarządzaniu zasobami naturalnymi, skupiając się na kontekście instytucjonalnym. Ten, wydawać by się mogło, niszowy temat badawczy okazuje się bardzo trudny do jednoznacznego sklasyfikowania i ewoluuje już od ponad stu lat. Szybko zmieniająca się struktura otoczenia oraz działających w nim instytucji czyni globalne i lokalne zarządzanie zasobami naturalnymi coraz trudniejszym. Autor przedstawia w tym artykule pełne spektrum tego tematu, istniejące badania, interpretacje oraz nowe wyzwania. Wyjaśnia również ich genezę i występujące pomiędzy nimi współzależności. Na końcu przedstawione zostają wnioski i spostrzeżenia.
This article examines the contemporary and the classic studies on uncertainty in the management of natural resources, focusing on the institutional context. This seemingly niche research turns out to be very difficult to be clearly classified, it has been evolving for over a hundred years. Rapidly changing structure of environment and its institutions makes global and local natural resource management increasingly difficult. The author presents in this article the full spectrum of the subject, existing studies, interpretations, and new challenges. It also explains the origins and interdependence existing between them. Finally, conclusions and observations are presented.
Źródło:
Rocznik Towarzystwa Naukowego Płockiego; 2013, 5; s. 253-266
0860-5637
Pojawia się w:
Rocznik Towarzystwa Naukowego Płockiego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation of the construction products as a research challenge. Small error – big difference in assessment?
Autorzy:
Szewczak, E.
Piekarczuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/200289.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
numerical calculation
uncertainty
uncertainty influence on product assessment
niepewność
obliczenia numeryczne
wpływ niepewności na ocenę produktu
Opis:
The paper refers to the importance of test results uncertainty in the assessment of the construction product performance. Uncertainty understood as dispersion attributed to any value which is result of the tests, calculations or other evaluations, occurs at every level of assessment (material, product, construction). Authors presented the various approaches to uncertainty estimation, especially in situation of small number of tests results which is characteristic for testing of construction products. Effects of uncertainty on final assessment of construction product was analyzed using the example of bearing capacity of thin-walled structure obtained by numerical calculation. Different values of material tests uncertainty resulting from different approaches to its assessment was taken into account. It was demonstrated that the difference in the results of strength tests of a material, which falls within the limits of uncertainty, may result in a very significant difference in the evaluation of a structure.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 675-686
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robust Optimization Model for Location Transportation Problems with Ellipsoidal Uncertainty Set
Autorzy:
Pribadi, Diantiny Mariam
Chaerani, Diah
Dewanto, Stanley P.
Supian, Sudradjat
Subiyanto, Subiyanto
Powiązania:
https://bibliotekanauki.pl/articles/1062875.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ellipsoidal uncertainty set
Location transportation problem
Mixed integer linear problem
Robust Counterpart
Robust Optimization
Uncertainty demand
Opis:
The location transportation problem is a combination of location, routing and inventory facilities. The problem of transportation locations consists of strategic decisions and operational decisions. Strategy decisions consist of location and facility capacity to meet demand, while operational decisions consist of final production and optimal distribution. However, sometimes there is uncertainty in demand, which influences operational decisions. Robust Optimization is a method for solving problems that are affected by uncertainty in data. This study aims to apply single-stage with an ellipsoid approach to the problem of transportation locations with uncertainty in demand. Robust optimization through the ellipsoidal uncertainty set approach provides costs for strategic and operational decisions that tend to remain for each production period. As for the optimization model, the influence of uncertainty in demand can affect the uncertainty of strategic and operational costs.
Źródło:
World Scientific News; 2019, 127, 3; 296-310
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modyfikacja sposobu obliczania niepewności pomiaru
Modifying the Approach for Calculating the Measurement Uncertainty
Autorzy:
Fotowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/276174.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
niepewność pomiaru
prawo propagacji niepewności
propagacja rozkładów
measurement uncertainty
law of uncertainty propagation
propagation of distributions
Opis:
Wspólny Komitet ds. Przewodników w Metrologii JCGM zaproponował zmianę podejścia dotyczącą obliczania niepewności pomiaru przy wykorzystaniu prawa propagacji niepewności. Celem jest zbliżenie uzyskiwanych wyników obliczania niepewności standardowej wielkości wyjściowej z wynikiem otrzymywanym przy zastosowaniu zasady propagacji rozkładów za pomocą metody Monte Carlo. W artykule przedstawiono skutki przyjęcia nowych zasad obliczania niepewności standardowej podczas wyznaczania błędu przyrządu pomiarowego.
Joint Committee for Guides in Metrology JCGM proposed the change of an approach for calculating the measurement uncertainty using the law of propagation of uncertainty. The purpose is a comparison between the results of a standard uncertainty calculation of the output quantity with the use of the law of propagation and applying the propagation of distributions using a Monte Carlo method. In the article a results of the adoption of new approach for calculating the standard uncertainty of the measuring instrument error is presented.
Źródło:
Pomiary Automatyka Robotyka; 2016, 20, 3; 29-32
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie symulacyjne skuteczności diagnozowania komparacyjnego na przykładzie systemu alarmowego
Efficiency of comparative diagnosing for an alarm system - simulation results
Autorzy:
Dąbrowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/327902.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnozowanie
wiarygodność diagnozy
niepewność symptomu
niepewność syndromu
diagnosing
authenticity of diagnosis
uncertainty of symptom
uncertainty of syndrome
Opis:
Jednym z podstawowych wymagań stawianych procesom diagnozowania jest żądanie możliwie wysokiej wiarygodności formułowanych diagnoz. Wymaganie to ma szczególne znaczenie w przypadku diagnozowania urządzeń i systemów mających wpływ na bezpieczeństwo ludzi i/lub mienia o dużej wartości. Artykuł poświęcony jest prezentacji wyników symulacyjnych badań skuteczności diagnozowania (charakteryzowanej dwoma wskaźnikami: sprawnością diagnozowania i niezawodnością diagnoz) systemu alarmowego przy zastosowaniu tzw. diagnozowania komparacyjnego. Metoda ta, dzięki wielokrotnemu powtarzaniu testowania oraz wielopoziomowej komparacji symptomów i syndromu stanu, zapewnia - mimo wysokiego prawdopodobieństwa fałszywych wyników poszczególnych testów - wiarygodne diagnozy.
The key requirement for diagnosing processes is the demand of high authenticity of formulated diagnoses. This requirement is especially important in the case of devices and systems having an influence on man and possessions safety. The paper presents simulation results of diagnosing efficiency of an alarm system characterized by two coefficients: efficiency of diagnosing and reliability of diagnoses, obtained by the use of comparative diagnosing. Despite high probability of false results for individual tests this method provides reliable diagnoses accomplished by repetitive testing and multi-level comparison of symptoms and syndrome of state.
Źródło:
Diagnostyka; 2006, 2(38); 115-120
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnozowanie z dwupoziomową komparacją niepewnych symptomów i syndromu stanu obiektu
Diagnosing with double-level comparison of uncertain symptoms and syndrome of an object state
Autorzy:
Będkowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/327900.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
diagnozowanie
wiarygodność diagnozy
niepewność symptomu
niepewność syndromu
diagnosing
authenticity of diagnosis
uncertainty of symptom
uncertainty of syndrome
Opis:
W artykule rozważa się zagadnienie wiarygodności diagnoz formułowanych w oparciu o niepewne (np. z powodu zakłóceń procesu diagnozowania) symptomy i syndromy stanu obiektu. Proponuje się metodę diagnozowania umożliwiającą otrzymywanie dostatecznie wiarygodnych diagnoz poprzez powtarzanie testowania oraz komparację uzyskanych symptomów i syndromów. Opisano 6 reguł wyboru diagnozy oraz omówiono ograniczenia ich zastosowań i wskaźniki ocenowe.
A question of authenticity of diagnosis formulated on the basis of uncertain symptoms and syndromes of an object state is discussed. A diagnosing method that allows receiving the sufficiently authentic diagnoses through repetition of testing and comparison of obtained symptoms and syndromes is proposed. The 6 rules of diagnostic inference are described. Additionally application limits and assessment indicators are discussed.
Źródło:
Diagnostyka; 2006, 2(38); 109-114
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tourist development between security and terrorism: empirical evidence from Europe and the United States
Autorzy:
Stankova, Mariya
Tsvetkov, Tsvetomir
Ivanova, Lyubov
Powiązania:
https://bibliotekanauki.pl/articles/19090919.pdf
Data publikacji:
2019
Wydawca:
Instytut Badań Gospodarczych
Tematy:
terrorism
revenues from international tourism
managing uncertainty
Opis:
Research background: Today's world is torn between extreme conservatism and duality, in opposition, trying to break the classical framework of freedom in the movement of people. In the context of complex global relations, this impulse, especially related to the travels for tourism purposes, raises new issues concerning the safety and security. The tourism industry has a priority for the economic development of many countries in the world and is a large source of export earnings and, at the same time, an important factor in the balance of payments of a significant part of the national economies in the world. The growing importance of the tourism industry, however, puts tourist destinations worldwide at the forefront of new challenges, one of which is terrorism. In this environment, new relationships are emerging and this reflects on the development strategies, as well as on the financial outcomes of tourism industry which are also largely affected. Purpose of the article: Respecting the new realities, the study explores the link between the risk of terrorism and the revenues from international tourism. Its main purpose is to investigate the impact of terrorism on the financial revenues from tourism in the European countries and the United States. The research is deter-mined by the perception that the financial flows from the international tourism are the quantitative manifestation of the hidden effects of the terrorism. Methods: The research method includes a regression cross-section analysis and Granger Causality test. The survey is panel and includes 37 countries from Europe tourism region and the United States from Americas' tourism region (according UNWTO) for the period 2012?2017. Findings & Value added: In conclusion, the effects of terrorism on the studied regions have been summarized, establishing dependence between terrorism and tourism, which illustrates a specific creative-destructive reflections of terrorism on tourism with regions particularities.
Źródło:
Oeconomia Copernicana; 2019, 10, 2; 219-237
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Fuzzy Model for Assessing Risk of Occupational Safety in the Processing Industry
Autorzy:
Tadic, D.
Djapan, M.
Misita, M.
Stefanovic, M.
Milanovic, D. D.
Powiązania:
https://bibliotekanauki.pl/articles/90316.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
occupational safety
risk assessment
uncertainty
fuzzy sets
Opis:
Managing occupational safety in any kind of industry, especially in processing, is very important and complex. This paper develops a new method for occupational risk assessment in the presence of uncertainties. Uncertain values of hazardous factors and consequence frequencies are described with linguistic expressions defined by a safety management team. They are modeled with fuzzy sets. Consequence severities depend on current hazardous factors, and their values are calculated with the proposed procedure. The proposed model is tested with real-life data from fruit processing firms in Central Serbia.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 2; 115-126
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BOOK REVIEWS Jakob Arnoldi, Risk. An Introduction
Autorzy:
Stankiewicz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1929690.pdf
Data publikacji:
2011-03-23
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
risk
risk government
uncertainty
experts
technology assessment
Źródło:
Polish Sociological Review; 2011, 173, 1; 119-130
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new visualizing tool for communicating cost-effectiveness of safety measures
Autorzy:
Bjorheim, A. E.
Terje, A.
Willy, R.
Powiązania:
https://bibliotekanauki.pl/articles/2069703.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
cost-effectiveness analysis
CEA
safety measures
uncertainty
Opis:
A cost-effectiveness analysis (CEA) is often used as basis for comparisons between competing safety measures. In a CEA indices such as the expected cost per expected number of lives saved are calculated. These indices are presented to the decision-makers, and seen in relation to reference values, they form the basis for assessment of the effectiveness of the safety measures. The appropriateness of using cost-effectiveness indices based on expected values have been thoroughly discussed in the literature. It is argued that uncertainty is not properly taken into account by the CEA, and extended frameworks for CEA are required. This paper represents a contribution to this end, by presenting a diagram that visualizes uncertainty in addition to the expected values as in the traditional CEA. The diagram is meant to be a presentation tool for semi-quantitative cost-effectiveness analyses used as a part of a screening process to identify safety measures to be assessed in a more detailed analysis. In the paper we discuss the use of the diagram in communication between analysts and other stakeholders, in particular the decision-makers. An example is presented to illustrate the applicability of the tool.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 1; 9--14
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Present metrological standards in mathematical modeling procedures
Autorzy:
Twardowski, K.
Lewandowska-Śmierzchalska, J.
Przybyłowicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/299201.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mathematical modeling
metrology
measurement error
measurement uncertainty
Opis:
In the years 1993-1994 International Organization for Standardization (ISO) introduced to the metrology the fundamental changes of basic character, involving - in addition to the traditional concept of measurement error - the use of new fundamental term of uncertainty of measurement. In consequence, this has led to currently undisputed axiom of metrology, that the measurement result has a form of a section on dimensional axis. These rules of presenting measurable physical values should be reflected in the of practical procedures of mathematical modeling. Presented work relates to this particular problem. It discusses the principles of mathematical modeling together with the assessment of the results. Particular attention was paid to the identification of possible systematic errors (i.e. the load of model) and to estimating the uncertainty of the statistical and deterministic modeling.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 247-259
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognostics uncertainty reduction by right-time prediction of remaining useful life based on hidden Markov model and proportional hazard model
Autorzy:
Zhiyong, Gao
Jiwu, Li
Rongxi, Wang
Powiązania:
https://bibliotekanauki.pl/articles/1841766.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
RUL
uncertainty
right-time prediction
PHM
HMM
Opis:
Uncertainty is a key problem in remaining useful life (RUL) prediction, and measures to reduce uncertainty are necessary to make RUL prediction truly practical. In this paper, a right-time prediction method is proposed to reduce the prognostics uncertainty of mechanical systems under unobservable degradation. Correspondingly, the whole RUL prediction process is divided into three parts, including offline modelling, online state estimating and online life predicting. In the offline modelling part, hidden Markov model (HMM) and proportional hazard model (PHM) are built to map the whole degradation path. During operation, the degradation state of the object is estimated in real time. Once the last degradation state reached, the degradation characteristics are extracted, and the survival function is obtained with the fitted PHM. The proposed method is demonstrated on an engine dataset and shows higher accuracy than traditional method. By fusing the extracted degradation characteristics, the obtained survival function can be basis for optimal maintenance with lower uncertainty.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 154-164
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On parametric Hurwitz stability margin of real polynomials
Autorzy:
Husek, P.
Powiązania:
https://bibliotekanauki.pl/articles/1839184.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
robust stability
parametric uncertainty
continuous-time systems
Opis:
The paper deals with the problem of determining Hurwitz stability of a ball of polynomials defined by a weighted lp norm in the coefficient space where p is an arbitrary positive integer including infinity. The solution of the case when the weights are supposed to be the same for coefficient being above and below its nominal value corresponding to symmetric ball has been given by Tsypkin and Polyak. However, sometimes it seems to be useful to have a possibility to consider these weights as different, resulting in the asymmetric ball. This is, for example, the situation where the weights express our level of confidence that the real value of a coefficient lies in some interval. Such approach is used if the value of a coefficient is estimated by an expert. Solution of the problem is based on frequency domain plot in the complex plane and on applying the Zero Exclusion Theorem. The main idea consists in separation of the original problem into four subproblems and using an appropriate coordinate transformation which makes the value set independent of frequency. This transformation makes it possible to move the relative value set into the origin of the complex plane and to easily formulate the necessary and sufficient condition of Hurwitz stability of asymmetric ball of polynomials with prescribed radius or determine the maximum radius preserving stability. The whole graphical procedure consists of four plots instead of one, needed in the symmetric case.
Źródło:
Control and Cybernetics; 2008, 37, 3; 549-563
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zakres spektralny kamery termowizyjnej do badań w mikroelektronice
Spectral Range of IR Camera for Research in Microelectronics
Autorzy:
Błąd, G.
Wałach, T.
Powiązania:
https://bibliotekanauki.pl/articles/157693.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
termografia
mikroelektronika
niepewność
infrared thermography
microelectronics
uncertainty
Opis:
Omówiono główne czynniki wpływające na wybór zakresu spektralnego kamery termowizyjnej do badań w mikroelektronice: parametry katalogowe kamer, przebiegi krzywych kalibracyjnych oraz własności promienne mikroukładów. Dla oceny kamer opracowano procedurę i obliczono niepewność standardową pomiaru emisyjności i temperatury. Zwykle mniejszą niepewność oferują kamery średniofalowe, lecz inne czynniki mogą zdecydować o wyborze kamery długofalowej.
In microelectronics the accuracy of infrared thermography very often depends strongly on the IR camera spectral range. Cameras with different spectral ranges are usually compared using the uncertainty of temperature measurements. There are several works devoted to calculating this uncertainty. Unfortunately, in these works the uncertainty of emissivity measurements is arbitrarily determined, which makes it difficult to evaluate generally the accuracy of cameras. In the paper procedures for calculation of the relative combined standard uncertainties of emissivity and temperature measurements are proposed. Thanks to knowledge of the definition of some camera parameters it was possible to estimate well the uncertainty components coming from the camera by using statistical relationships and to achieve a high reliability of calculations. The calculation results allow one both to evaluate generally the uncertainties for IR cameras with various spectral ranges and to determine the conditions of obtaining low values of these uncertainties. The camera calibration curve shape influences not only the uncertainty but also the result of averaging temperatures in the camera ground instantaneous field-of-view. The dependence of this result on the spectral range is analysed in the work. In microelectronics the radiative properties of the components may often have the main influence on the choice of camera. Some of these properties and their impact on measurements are also discussed.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 11, 11; 878-881
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trust and risk at the time of the pandemic
Zaufanie i ryzyko w czasach zarazy
Autorzy:
Sztompka, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2121395.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
uncertainty
threat
risk
trust
moral space
pandemic
Opis:
The uncertainty, threats and risks are unavoidable aspects of human existence. The response to them is trust, the expectation of beneficial, future actions of others (individuals, institutions, organizations). Risk and trust take unique forms during pandemic. Risk is global, universal, hard to assess and attached to com- mon, everyday actions. Trust, the bridge over the abyss of uncertainty, is direct- ed toward three addressees: the government, medicine (medical science, servi- ces and products), and the other members of society. For each category the ex- pectations are different. These theoretical considerations are applied and illu- strated by the brief history of the pandemic in Poland.
Źródło:
Nauka; 2021, 4; 7-18
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ethics, Uncertainty, and Macroeconomics
Autorzy:
Maziarz, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/653229.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
uncertainty
monetary policy
fiscal policy
recession
macroeconomics
Opis:
In this article, I focus on the difference in moral judgment of macroeconomic interventions between the deterministic world of a thought experiment and the uncertain reality. The macroeconomic theory coined by Keynes is, in its most popular reading, deterministic and justifies interventionism. However, incorporating uncertainty into the analysis leads to the contrary result. Namely, if economic output is a random process, such as Gaussian white noise or a stochastic Markov chain, then intervening can bring either economic recovery or inflationary pressure and a next bubble. In the trolley‑problem philosophy, the one who pulls the lever instead of the trolley itself is believed to be guilty of the death of an innocent passer‑by standing on the side track. Similarly, if the Federal Reserve decided to intervene and failed (causing a bubble on the house market, instantiating), their monetary policy can be said to be a cause of the financial crisis. Therefore, governments should refrain from interventions.
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2017, 20, 4
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty of pressure measurement in a single-bed adsorber
Autorzy:
Neska, Mirosław Cezary
Opara, Andrzej Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/2051848.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
measurement
uncertainty
adsorber
adsorbent bed
adsorption chiller
Opis:
An adsorber in which sorption processes occur is one of the key components of an adsorption chiller. Precise real-time monitoring of and supervision over these processes are particularly important to ensure their proper execution. The article describes the experimental stand used for the measurement of the adsorber’s operating parameters and analyses pressure measurement uncertainties, taking into account the impact of the temperature on the test system filled with the adsorbent in the form of silica gel, while concurrently considering the influence of other factors (e.g. the environment, the A/A, and A/D conversion, or data processing) on measurement uncertainties. A complex analysis of uncertainties was carried out, including the results of the statistical analysis of the measurement data obtained from long-term experimental tests of the object and the uncertainties of the pressure measuring chain by the type B method, involving the consideration of interactions between the system components and the temperature impact on the propagation of uncertainties. As part of the analysis, the characteristic stages of the data collection and processing operations related to the sampling rate and measurement intervals were separated. The article presents the prototype test stand and original pressure measurement system for the verification of a single-bed adsorber working below 10 hPa.The novel construction of a single-bed adsorber was used as a test object. Furthermore, in this paper, the developed algorithm of the research method implemented in the system was discussed and positively verified.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 93-108
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application Of Bias Randomization In Evaluation Of Measuring Instrument Capability
Autorzy:
Fotowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/220973.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
measurement uncertainty
bias randomization
measuring instrument capability
Opis:
The paper deals with the problem of bias randomization in evaluation of the measuring instrument capability. The bias plays a significant role in assessment of the measuring instrument quality. Because the measurement uncertainty is a comfortable parameter for evaluation in metrology, the bias may be treated as a component of the uncertainty associated with the measuring instrument. The basic method for calculation of the uncertainty in modern metrology is propagation of distributions. Any component of the uncertainty budget should be expressed as a distribution. Usually, in the case of a systematic effect being a bias, the rectangular distribution is assumed. In the paper an alternative randomization method using the Flatten-Gaussian distribution is proposed.
Źródło:
Metrology and Measurement Systems; 2015, 22, 4; 513-520
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating the uncertainty of tensile strength measurement for a photocured material produced by additive manufacturing
Autorzy:
Adamczak, S.
Bochnia, J.
Kaczmarska, B.
Powiązania:
https://bibliotekanauki.pl/articles/221806.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
static tensile test
measurement error
measurement uncertainty
Opis:
The aim of this study was to estimate the measurement uncertainty for a material produced by additive manufacturing. The material investigated was FullCure 720 photocured resin, which was applied to fabricate tensile specimens with a Connex 350 3D printer based on PolyJet technology. The tensile strength of the specimens established through static tensile testing was used to determine the measurement uncertainty. There is a need for extensive research into the performance of model materials obtained via 3D printing as they have not been studied sufficiently like metal alloys or plastics, the most common structural materials. In this analysis, the measurement uncertainty was estimated using a larger number of samples than usual, i.e., thirty instead of typical ten. The results can be very useful to engineers who design models and finished products using this material. The investigations also show how wide the scatter of results is.
Źródło:
Metrology and Measurement Systems; 2014, 21, 3; 553-560
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Power grid impedance tracking with uncertainty estimation using two stage weighted least squares
Autorzy:
Borkowski, D.
Barczentewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/220406.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power system
utility impedance tracking
uncertainty estimation
Opis:
The paper presents a new method for simultaneous tracking of varying grid impedance and its uncertainty bounds. Impedance tracking consists of two stages. In the first stage, the actual noise estimate is obtained from least squares (LS) residua. In the second stage, the noise covariance matrix is approximated with the use of residual information. Then weighted least squares (WLS) method is applied in order to estimate impedance and background voltage. Finally uncertainty bounds for impedance estimation are computed. The robustness of the method has been verified using simulated signals. The proposed method has been compared to sliding LS. The results have shown, that the method performs much better than the LS for all considered cases, even in the presence of significant background voltage variations.
Źródło:
Metrology and Measurement Systems; 2014, 21, 1; 99-110
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral Uncertainties: A review of Precarity and Loss: On Certain and Uncertain Properties of Life and Work
Autorzy:
Lorek-Jezińska, Edyta
Więckowska, Katarzyna ---
Powiązania:
https://bibliotekanauki.pl/articles/632553.pdf
Data publikacji:
2017
Wydawca:
Projekt Avant
Tematy:
precarity, uncertainty, precariat, work, loss, philosophy, deconstruction
Opis:
Precarity and Loss: On Certain and Uncertain Properties of Life and Work is composed of an extensive introduction outlining the scope of the book and five chapters examining various discourses on uncertainty in order to assess and represent the possibilities of escaping may be provisionally differentiated into material precarity and existential precariousness. Each of the chapters addresses a different set of questions-of what, how, why, where, and who-thereby ordering the content according to the inquiries that are basic in information gathering and problem solving. The first chapter poses the question “What?”, predominantly with regard to loss as well as time, and comments on two major issues: perishability and the idea of having time. The focus in the second chapter is on “How?”, particularly on how time and work are used, and on the relations between economy and aesthetics, illustrated by the discussion of, inter alia, John Ruskin’s discourses on work and art, or Oscar Wilde’s notion of individualism. The third chapter revisits the uncertainty in / of Descartes’s writing and examines “the threat of there being nothing instead of something” that Rachwał sees as standing “behind the founding question of metaphysics asking ‘Why is there something instead of nothing?’” (Heidegger as cited in Rachwał, 2016, p. 51). The fourth chapter is dedicated to the question “Where?” and investigates the spaces, physical and conceptual, that answer to and oppose precarity and precariousness. The final chapter is a manifesto of sorts which, by addressing those subjected to precarity and precariousness, performatively re-constitutes them as subjects, turning them into a collectivity of “the Precariat; or All Together Now” (p. 105).
Źródło:
Avant; 2017, 8, 2
2082-6710
Pojawia się w:
Avant
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tolerance for uncertainty in elderly people
Autorzy:
Kachmaryk, Khrystyna
Grabovska, Sophia
Ostrovska, Kateryna
Syniev, Viktor
Powiązania:
https://bibliotekanauki.pl/articles/628228.pdf
Data publikacji:
2014
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
tolerance, uncertainty, third age university, elderly people
Opis:
The aim of the study. The aim of the paper is a comparison of tolerance to uncertainty in two groups of elderly: the students of the University of the Third Age (UTA) and older people who are not enrolled but help to educate grandchildren. A relation to uncertainty was shown to infl uence on decision making strategy of elderly that indicates on importance of the researches. Methods. To obtain the objectives of the paper the following methods were used: 1) Personal change readiness survey (PCRS) adapted by Nickolay Bazhanov and Galina Bardiyer; 2) Tolerance Ambiguity Scale (TAS) adapted by Galina Soldatova; 3) Freiburg personality inventory (FPI) and 4) The questionnaire of self-relation by Vladimir Stolin and Sergej Panteleev. 40 socially involved elderly people were investigated according the above methods, 20 from UTA and 20 who are not studied and served as control group. Results. It was shown that relations of tolerance to uncertainty in the study group of students of the University of the Third Age substantially differ from relations of tolerance to uncertainty in group of older people who do not learn. The majority of students of the University of the Third Age have an inherent low tolerance for uncertainty, which is associated with an increase in expression personality traits and characteristics in self-relation. The group of the elderly who are not enrolled increasingly shows tolerance of uncertainty, focusing on  the social and trusting relationship to meet the needs of communication, and the ability to manage their own emotions and desires than a group of Third Age university students. Conclusions. The results of experimental research of the third age university student’s peculiarities of the tolerance to uncertainty were outlined. It was found that decision making in the ambiguity situations concerning social interaction is well developed in elderly who do not study. The students of the University of Third Age have greater needs in conversation, social interaction than the control group and should learn to make decisionin ambiguity or uncertainty situations.
Źródło:
Journal of Education Culture and Society; 2014, 5, 1; 20-27
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niepewność wyników pomiarów w technice nurkowej
The uncertainty of measurement results in diving technology
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/366203.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
niepewność
błąd pomiaru
uncertainty
error of measurements
Opis:
Nauka składa się z teorii. Dobrze określona teoria posiada sprecyzowany: przedmiot poznania i jego otoczenie, miejsce w systemie wiedzy, swoiste metody i język1. Metrologia2, będąca osobną dziedziną wiedzy stosuje własny, specyficzny język. Spis definicji metrologicznych zawiera ich międzynarodowy słownik [6], za którym będą niektóre z nich tutaj przytoczone. W technice nurkowej, określenie niepewności wykonywanych pomiarów jest niezwykle istotne z punktu widzenia bezpieczeństwa akwanautów.
Science consists of theories. Precisely defined theory comprises the study of a subject, its surroundings, place in the existing knowledge system, and specific methodology and language. Metrology as a separate knowledge sphere and has a specific language. Definitions of metrological names are included in the international vocabulary [6]. In diving technology the uncertainty of measurements is essential for the aquanauts' safety.
Źródło:
Polish Hyperbaric Research; 2006, 1(14); 31-48
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty evaluation of the minimal value measurements
Autorzy:
Dorozhovets, M.
Warsza, Z. L.
Popovych, I.
Powiązania:
https://bibliotekanauki.pl/articles/114616.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
minimal value of observations
uncertainty type A
Opis:
The non-standard statistical method for evaluating uncertainty for a minimal value of observations as the measurement result, is proposed. This method is based on properties of minimal order statistic. As example from the practice this method is used to evaluate the uncertainty of a percent elongation and tensile strength in testing plastic products.
Źródło:
Measurement Automation Monitoring; 2015, 61, 8; 395-398
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of uninorms to aggregate uncertainty from many classifiers
Autorzy:
Drygaś, Paweł
Bazan, Jan G.
Pusz, Piotr
Knap, Maksymilian
Powiązania:
https://bibliotekanauki.pl/articles/384601.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
aggregation function
decision making
classifier
uncertainty area
Opis:
In this contribution we want to present the concept of uncertainty area of classifiers and an algorithm that uses uninorms to minimize the area of uncertainty in the pre‐ diction of new objects by complex classifiers.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 4; 85-90
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
About evaluation of multivariate measurements results
Autorzy:
Warsza, Z. L.
Powiązania:
https://bibliotekanauki.pl/articles/384932.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
uncertainty
indirect measurements
multi-measurand
correlated data
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 4; 27-32
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognostics uncertainty reduction by right-time prediction of remaining useful life based on hidden Markov model and proportional hazard model
Autorzy:
Zhiyong, Gao
Jiwu, Li
Rongxi, Wang
Powiązania:
https://bibliotekanauki.pl/articles/1841790.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
RUL
uncertainty
right-time prediction
PHM
HMM
Opis:
Uncertainty is a key problem in remaining useful life (RUL) prediction, and measures to reduce uncertainty are necessary to make RUL prediction truly practical. In this paper, a right-time prediction method is proposed to reduce the prognostics uncertainty of mechanical systems under unobservable degradation. Correspondingly, the whole RUL prediction process is divided into three parts, including offline modelling, online state estimating and online life predicting. In the offline modelling part, hidden Markov model (HMM) and proportional hazard model (PHM) are built to map the whole degradation path. During operation, the degradation state of the object is estimated in real time. Once the last degradation state reached, the degradation characteristics are extracted, and the survival function is obtained with the fitted PHM. The proposed method is demonstrated on an engine dataset and shows higher accuracy than traditional method. By fusing the extracted degradation characteristics, the obtained survival function can be basis for optimal maintenance with lower uncertainty.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 154-164
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pobieranie próbek gleby w kontekście prowadzenia oceny zanieczyszczenia powierzchni ziemi
Soil sampling in the context of land surface pollution assessment
Autorzy:
Gajec, M.
Król, A.
Kukulska-Zając, E.
Mostowska-Stąsiek, J.
Powiązania:
https://bibliotekanauki.pl/articles/1835187.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
pobieranie próbek
gleba
niepewność
sampling
soil
uncertainty
Opis:
W artykule omówiono prawodawstwo w zakresie pobierania próbek gleby, obowiązujące podczas prowadzenia oceny zanieczyszczenia powierzchni ziemi. Dokonany przegląd pokazał, że na szczeblu unijnym problem regulacji prawnej związanej z ochroną gleb został dostrzeżony, lecz nadal nie doszło do wprowadzenia jednej dyrektywy poruszającej ten temat. W przypadku regulacji krajowych istnieje rozporządzenie podejmujące zagadnienia związane z pobieraniem próbek gleb w celu dokonania oceny zanieczyszczenia powierzchni ziemi, która powinna być prowadzona na podstawie wiarygodnych wyników wraz z oszacowaną niepewnością, uwzględniającą wszystkie kluczowe składowe. Zaprezentowano wyniki badań otrzymane dla próbek gleby, pobranych zgodnie z omówionymi regulacjami prawnymi. Na podstawie wyników analiz czterech parametrów otrzymanych dla próbek pobranych zgodnie z projektem zrównoważonym (polegającym na wykonaniu dwukrotnych analiz dla dwukrotnie pobranych próbek z ośmiu obiektów), oszacowano niepewność procesu oraz jej składowe (stosując analizę wariancji robust ANOVA). Najbardziej znaczącym udziałem w oszacowanej niepewności procesu (Umeas) była niepewność pochodząca z etapu pobierania próbek.
The article discusses the legislation in the field of soil sampling, which is obligatory during the assessment of soil surface pollution. The review showed that at the EU level, the problem of legal regulation related to soil protection has been noticed, but a single directive dealing with soil protection has not yet been implemented. In the case of national regulations, there is one that deals with issues related to the sampling of soils in order to assess the pollution of the Earth surface. The assessment of ground contamination should be based on reliable results together with estimated uncertainty, which takes into account all key components. The results of the tests obtained for the soil samples that have been collected according to mentioned legal regulations have been presented and discussed. The article shows the results of empirical methodology (robust ANOVA) using data from balanced experimental design, which includes duplicate samples analyzed in duplicate from 8 sampling targets. Robust ANOVA methodology is used for the estimation of the uncertainty arising from the manual sampling of soils and determination of four tested parameters. Based on the results of the study, it was found that the most significant contribution to the estimated uncertainty of the process (Umeas), was the uncertainty arising from sampling.
Źródło:
Nafta-Gaz; 2018, 74, 3; 215-225
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lowering the uncertainty in fast noise measurement procedures
Autorzy:
Acciari, G.
Giannini, F.
Limiti, E.
Saggio, G.
Powiązania:
https://bibliotekanauki.pl/articles/308146.pdf
Data publikacji:
2002
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
noise
device characterisation
measurement errors
lowering uncertainty
Opis:
To completely characterise the noise behaviour of a two port device, four noise parameters F(min), R(n), G(opt) and B(opt) must be determined. This paper reports improvements in the uncertainty related to the above parameters, taking into account measurement errors due both to the limited instrument precision and connection repeatability. Results are reported for noise characterisation of 0.3 žm delta-doped HEMT devices by Alenia, demonstrating as the common hot-cold measurement procedure can result with an error confidence as low as 0.2% for all the noise parameters.
Źródło:
Journal of Telecommunications and Information Technology; 2002, 1; 29-33
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problems connected with measuring risks of foreign direct investments
Autorzy:
Kozłowska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/522018.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
FDI risk measurement
FDI risk
Risk
Uncertainty
Opis:
Any human activity, including the economic one, is carried out under the conditions of uncertainty, which arises from the complexity of reality. Uncertainty is closely related to risk. The concepts of uncertainty and risk, and thus the relations between them are not defined in the same way. The literature gives different criteria for the classification of the investment risk. With respect to the FDI, a risk can be divided into a general risk, associated with investing, and a special risk, arising from the location of investments outside the country of the investor’s origin. The special risk is usually divided into political (considered crucial) and economic, and both these groups of risks are microeconomic and macroeconomic. A multitude types of investment risks and their globalization make it difficult to identify all their sources and their assessment, which makes the decision about investing not an easy task. Additionally, a number of important determinants of management is difficult to calculate or irrational, which further complicates the decision-making process.
Źródło:
Journal of Economics and Management; 2015, 20; 93-105
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Randomizacja odchylenia pomiarowego przy ocenie zdolności pomiarowej przyrządu
Bias randomization in evaluation of measurement instrument capability
Autorzy:
Fotowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/274855.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
zdolność pomiarowa
niepewność pomiaru
measurement capability
uncertainty
Opis:
Randomizację odchylenia pomiarowego wykorzystuje się przy ocenie zdolności pomiarowej przyrządu. Odchylenie pomiarowe to estymata błędu systematycznego wyznaczana jako różnica pomiędzy wskazaniem przyrządu pomiarowego a wartością wzorcową. Randomizacja polega na przyjęciu odpowiedniego rozkładu prawdopodobieństwa dla tego odchylenia. Miarą zdolności pomiarowej przyrządu jest niepewność rozszerzona obliczana po wykonaniu pomiaru na wzorcu pomiarowym. Niepewność tę odnosi się do wartości granicznej, którą może być największy błąd dopuszczalny. Zdolność pomiarowa jest wskaźnikiem umożliwiającym ocenę jakości metrologicznej przyrządu.
Randomizing of a bias is used in evaluation of measurement instrument capability. Bias is an estimate of systematic error treated as difference between an indication of measuring instrument and a value of standard. Randomization relies on the assumption of suitable probability distribution for the bias. The measure of the capability is an expanded uncertainty calculating after measurement on the standard. The expanded uncertainty is related to limited value. This limited value may be a maximum permissible error.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 7-8; 96-99
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zdolność pomiarowa przyrządu
Capability of measurement instrument
Autorzy:
Fotowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/276668.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
zdolność pomiarowa
niepewność pomiaru
measurement capability
uncertainty
Opis:
Zdolność pomiarowa jest wskaźnikiem umożliwiającym ocenę jakości metrologicznej przyrządu. Miarą zdolności pomiarowej przyrządu jest niepewność rozszerzona obliczana po wykonaniu pomiaru na wzorcu pomiarowym. W budżecie niepewności uwzględnia się obok składowej przypadkowej również składową systematyczną w postaci odchylenia pomiarowego. Skumulowaną niepewność odnosi się do wartości granicznej, którą może być największy błąd dopuszczalny.
Capability of measurement instrument is an indicator enabling evaluation of metrological quality of instrument. The measure of the capability is an expanded uncertainty calculating after measurement on the standard. The uncertainty budget consists both random and systematical eaects as a bias. The aggregated uncertainty is related to limited value. This limited value may be a maximum permissible error.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 2; 540-541
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vehicle navigation in populated areas using predictive control with environmental uncertainty handling
Autorzy:
Skrzypczyk, K.
Mellado, M.
Powiązania:
https://bibliotekanauki.pl/articles/229599.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
motion planning
prediction
uncertainty handling
game theory
Opis:
This paper addresses the problem of navigating an autonomous vehicle using environmental dynamics prediction. The usefulness of the Game Against Nature formalism adapted to modelling environmental prediction uncertainty is discussed. The possibility of the control law synthesis on the basis of strategies against Nature is presented. The properties and effectiveness of the approach presented are verified by simulations carried out in MATLAB.
Źródło:
Archives of Control Sciences; 2017, 27, 2; 351-359
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uncertainty of the conversion function caused by systematic effects in measurements of input and output quantities
Autorzy:
Dorozhovets, Mykhaylo
Powiązania:
https://bibliotekanauki.pl/articles/27311757.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
uncertainty
systematic
effects
polynomial function
measurement system
Opis:
The paper presents an evaluation with the Type A and B methods for standard uncertainties of coefficients of a polynomial function of order determined by points obtained by measurement of input and output quantities. A method for deriving a posteriori distributions of function coefficients based on the transformation of estimator distributions without assuming any a priori distributions is presented. It was emphasized that since the correct values of the standard uncertainty of type A depend on the √(n-k-3) and not on the √(n-k-1), therefore, with a small number of measurement points, the use of the classical approach leads to a significant underestimation of uncertainty. The relationships for direct evaluation with the type B method of uncertainties caused by uncorrected systematic additive (offset error) and multiplicative (gain error) effects in the measurements of both input and output quantities are derived. These standard uncertainties are determined on the basis of the manufacturers’ declared values of the maximum permissible errors of the measuring instruments used. A Monte Carlo experiment was carried out to verify the uncertainties of the coefficients and quadratic function, the results of which fully confirmed the results obtained analytically.
Źródło:
Metrology and Measurement Systems; 2023, 30, 3; 581--600
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zasada ostrożności, czyli teoretycznie ustrukturyzowana panika w czasach COVID-19
The precautionary principle, i.e. theoretically structured panic in the times of COVID-19
Autorzy:
Malinowski, Grzegorz M.
Powiązania:
https://bibliotekanauki.pl/articles/1012447.pdf
Data publikacji:
2020-09-30
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
precautionary principle
uncertainty
scientific uncertainty
heuristics
evidence-based policy
zasada ostrożności
decyzje
gospodarcze a niepewność
naukowa niepewność
heurystyki
Opis:
Artykuł dotyczy zasady ostrożności. Postawiono w nim hipotezę, że poczynania decydentów w okresie epidemii COVID-19 dowodzą, że zasada ta jest przydatnym i wartościowym instrumentem wspomagającym decyzje. Doświadczenie pandemii, związane z koniecznością usprawiedliwiania drastycznych działań prewencyjnych, neutralizuje znaczną część argumentów krytycznych względem zasady ostrożności. Jednocześnie, ten sam materiał badawczy umożliwia wyciągnięcie nowych wniosków na temat praktyki stosowania zasady ostrożności. W pierwszej części artykułu została omówiona koncepcja zasady ostrożności, jej definicja oraz najważniejsze głosy względem niej krytyczne. W drugiej wykazano, że obserwowana aktualnie praktyka stosowania tej zasadyneutralizuje istotną część zarzutów formułowanych pod jej adresem. Ponadto, wychodząc od tych samych obserwacji, zostały wskazane nowe, niedostatecznie przebadane jeszcze obszary refleksji nad zasadą ostrożności w kontekście podejmowania decyzji gospodarczych w warunkach niepewności.
The article deals with the precautionary principle. A hypothesis was formulated that the actions of decision-makers during the COVID-19 epidemic prove that this principle is a useful and valuable instrument for supporting decisions. The experience of a pandemic, associated with the need to justify drastic preventive actions, neutralizes a large part of the arguments critical of the precautionary principle. At the same time, the same research material enables new conclusions to be drawn about the practical application of the precautionary principle. The first part of the article discusses the concept of the precautionary principle, its definition, and the most important voices critical of it. The second one demonstrates that the observed current practice of applying this principle neutralizes a significant part of the charges made against it. Moreover, starting from the same observations, new areas of reflection on the precautionary principle in the context of making economic decisions in the conditions of uncertainty have been identified.
Źródło:
Kwartalnik Nauk o Przedsiębiorstwie; 2020, 56, 3; 5-26
1896-656X
Pojawia się w:
Kwartalnik Nauk o Przedsiębiorstwie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zero-point thermal noise in resistors? A conclusion
Autorzy:
Kish, Laszlo B.
Powiązania:
https://bibliotekanauki.pl/articles/220951.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fluctuation Dissipation Theorem
resistors and fermionic versus bosonic systems
time-energy uncertainty principle versus location-momentum uncertainty principle
Opis:
The main points of the UPoN-2018 talk and some valuable comments from the Audience are briefly summarized. The talk surveyed the major issues with the notion of zero-point thermal noise in resistors and its visibility; moreover it gave some new arguments. The new arguments support the old view of Kleen that the known measurement data “showing” zero-point Johnson noise are instrumental artifacts caused by the energy-time uncertainty principle. We pointed out that, during the spectral analysis of blackbody radiation, another uncertainty principle is relevant, that is, the location-momentum uncertainty principle that causes only the widening of spectral lines instead of the zero-point noise artifact. This is the reason why the Planck formula is correctly confirmed by the blackbody radiation experiments. Finally a conjecture about the zero-point noise spectrum of wide-band amplifiers is shown, but that is yet to be tested experimentally.
Źródło:
Metrology and Measurement Systems; 2019, 26, 1; 3-11
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do primary event uncertainty distributions impact top event distribution?
Autorzy:
Górska, M.
Powiązania:
https://bibliotekanauki.pl/articles/118570.pdf
Data publikacji:
2011
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
fault tree
primary events distributions
top event distribution
uncertainty assessment
mode
uncertainty coefficient
reliability structure function
Monte Carlo simulation
Opis:
The risk analysis is an essential element of planning, production and operation of technical equipment. This paper deals with the fault tree. The fault tree analysis belongs to the most commonly used risk assessment methods. The main aim of the paper is to ask for the question: does the top event uncertainty assessment have a relationship with adopted assumption of primary events distribution?To achieve this aim a computer simulation that involve random numbers, commonly known as the Monte Carlo method, was used. The research makes use of the Beta, Lognormal, Johnson SJ and truncated Normal distribution.
Źródło:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2011, 3; 133-145
1897-7421
Pojawia się w:
Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szacowanie i wyrażanie niepewności pomiaru w centralnym Ośrodku Metrologii Wojskowej
Evaluating and expressing the uncertainty of measurement at the Primary Standards Laboratory
Autorzy:
Woźniak, E.
Powiązania:
https://bibliotekanauki.pl/articles/153380.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
niepewność pomiarowa
szacowanie niepewności
kalibracja
przetwornik pomiarowy
barometr hydrostatyczny
uncertainty of measurement
uncertainty evaluation
calibration
power sensor
hydrostatic barometer
Opis:
W artykule zaprezentowano w dwóch przykładach metodykę szacowania niepewności pomiaru na stanowiskach do kalibracji przyrządów pomiarowych w centralnym Osrodku Metrologii Wojskowej. Pierwszy przykład obejmuje procedurę szacowania niepewności wyznaczania poprawek częstotliwościowych mikrofalowego przetwornika mocy HP-483B. W drugim przykładzie przedstawiono procedurę szacowania niepewności pomiaru dla stanowiska do kalibracji barometrów hydrostatycznych B3. Przedstawione przykłady prezentują metody przyjęte podczas szacowania niepewności pomiaru dla szczególnego przypadku kalibracji wykonanej w laboratorium metrologicznym. W obu przykładach przedstawiono kolejne kroki procedury szacowania niepewności, ze szczególnym uwzględnieniem analizy źródeł niepewności, prowadzące do obliczenia złożonej niepewności standardowej i niepewności rozszerzonej.
Method of uncertainty evaluation of measuring installations for measuring instruments calibration at the Primary Standards Laboratory in two examples were presented in the article. The first one concerns a procedure for uncertainty evaluation, related to the determination of calibration factors of microwave power sensor HP-8481A interacting with power meter HP-438B. The second example concerns a procedure for uncertainty evaluation, related to the measuring installation for hydrostatic barometers (B3) calibration. The two examples present methods applied for measurement uncertainty evaluation for a very particular case of calibration performed at the calibration laboratory. Both examples present consecutive steps of uncertainty evaluation procedure, focused in a very considerable manner on uncertainty sources analysis, leading to calculation of standard combined uncertainty and expanded uncertainty.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 10, 10; 19-22
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-100 z 815

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