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Wyświetlanie 1-15 z 339
Tytuł:
The universal validation algorithm of coordinate measuring methods
Autorzy:
Gromczak, K.
Ostrowska, K.
Gąska, A.
Sładek, J.
Powiązania:
https://bibliotekanauki.pl/articles/114675.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
validation algorithm
validation model
coordinate measuring methods
Opis:
The paper presents the universal validation algorithm of coordinate measuring methods determined by the analysis and adaptation of appropriate validation parameters, techniques and models. The paper also provides the proposals of acceptance/rejection criteria of the analysed measurement method. These criteria are a set of mathematical formulas selected from numerous worldwide research publications and metrological studies, which have been tested, revised and adapted for the purposes of the validation.
Źródło:
Measurement Automation Monitoring; 2016, 62, 4; 120-124
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Submodel of bypass flow in cracking soils. Part 2. - Experimental validation
Autorzy:
Walczak, R.T.
Sobczuk, H.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/24990.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
bypass flow
flow mechanism
validation
soil crack
experimental validation
moisture content
numerical validation
water content
Źródło:
International Agrophysics; 1996, 10, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some aspects of validation of the fuel consumption measurement method
Autorzy:
Taubert, S.
Majerczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/244622.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel consumption
validation
Opis:
Currently produced diesel engines of different manufacturers, used for the same applications, have comparable specific fuel consumption. Therefore, the laboratories measuring fuel consumption, especially in comparative tests, require the use of more accurate methods of measurement. The Environmental Protection Centre of Motor Transport Institute has recently implemented the fuel consumption measurement method using KMA Mobile flow meter produced by AVL company. This device allows to carry out measurements by both volumetric and mass method, thanks to builtin device for measuring the fuel density. Due to some customers requirements the laboratory began with preparations for obtaining accreditation of the Polish Centre of Accreditation for the procedure of measuring fuel consumption by volumetric and mass method. One of the requirements of the Polish Centre for Accreditation is carrying out the validation of the new method. It can be done by comparing the results obtained with new method with the results of the method already validated. The validated method is described in the regulation. This is the carbon balance method described in UN-ECE Regulations No. 101. The calculation of fuel consumption according to this method is based on a measurement of pollutants emissions of carbon dioxide (CO2), carbon monoxide (CO) and hydrocarbons (THC). This paper describes the fuel consumptions measuring procedure using two methods: mass method using a AVL KMA Mobile flow meter and carbon balance method using the AVL AMA i60 analyzers. To verify measurement results additionally there was fuel consumption measured with using a scale, as a difference of the external fuel tank mass change, from which the vehicle was fuelled during the tests
Źródło:
Journal of KONES; 2013, 20, 4; 457-464
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychometric properties of the French versions of the Perceived Stress Scale
Autorzy:
Lesage, Francois-Xavier
Berjot, Sophie
Deschamps, Frederic
Powiązania:
https://bibliotekanauki.pl/articles/2180101.pdf
Data publikacji:
2012-06-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
stress
scale
validation
Opis:
Objectives: This study was conducted to examine the psychometric properties of the French versions of the Perceived Stress Scale (PSS) and to compare the appropriateness of the three versions of this scale (14 items, 10 items, or 4 items) in a sample of workers. Materials and Methods: Five hundred and one workers were randomly selected in several occupational health care centers of the North of France during 2010. Participants completed a questionnaire including demographic variables and the PSS. The psychometric properties of this scale were analyzed: internal consistency, factorial structure, and discriminative sensibility. Results: For the PSS-14 and PSS-10, the Exploratory Factor Analysis (EFA) provided a two-factor structure, corresponding to the positively and negatively worded items. Those two factors were significantly correlated (r = 0.43 and 0.50, respectively). For the PSS-4, the EFA yielded a one-factor structure. The reliability was high for all three versions of the PSS (Cronbach’s α values ranged from 0.73 to 0.84). The results concerning the effects of age, gender, marital, parental and occupational statuses showed that the 10-item version had the best discriminative sensibility. Conclusions: The findings confirmed satisfactory psychometric properties of all the three French versions of the PSS. We recommend the use of the PSS-10 in research settings because of its good psychometric properties.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2012, 25, 2; 178-184
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suggestibility Among the Indian Youth – A Validation Study of Multidimensional Iowa Suggestibility Scale
Autorzy:
Agarwal, Sanchi Pawankumar
Gawali, Gautam
Puranik, Deepti
Powiązania:
https://bibliotekanauki.pl/articles/29520509.pdf
Data publikacji:
2024-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
suggestibility
validation
MISS
personality
Opis:
Suggestibility is one of the personality traits. The ability to accept signals from oneself, another person, or any type of media without feeling obligated to do so, including messages concerning physiological feelings, is referred to as suggestibility. It varies from compliance in that it requires the internalisation of a message rather than just a behavioural change. The study aims to validate the Multidimensional Iowa suggestibility Scale (MISS) developed by Dr Roman Kotov on Indian youth for future use and application. The study’s hypothesis is that the scale will be highly reliable and valid for the Indian population. The original scale established by Dr Roman Kotov consisted of 95 items to be responded to by choosing the appropriate option from five given, which was given to an Indian sample of 510 individuals. The scale includes five suggestibility subscales and two companion scales. To check the validity, inter-scale correlation and reliability was performed. The results have been positive, with high correlations among the subscales, which suggests further future use. MISS, consisting of five subscales of suggestibility and a Short Suggestibility Scale, has been validated and can be used on the Indian population.
Źródło:
The New Educational Review; 2024, 75; 78-85
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Maslach Burnout Inventory–General Survey: validation across different occupational groups in Poland
Autorzy:
Chirkowska-Smolak, Teresa
Kleka, Pawel
Powiązania:
https://bibliotekanauki.pl/articles/430627.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
burnout
MBI-GS
validation
Opis:
This paper concerns the psychometric evaluation of the Polish version of a self-report questionnaire to measure burnout. Although the Maslach Burnout Inventory (MBI) is the most commonly employed measure of burnout, researchers have been troubled by some of its psychometric limitations. The aim of this study is to examine the MBI-GS factor structure in three occupational groups (both within the human services sector and elsewhere), and to evaluate its reliability (internal consistency). In evaluating factorial validity, we carried out an explanatory analysis and a number of confirmatory analyses (using the total database and the three occupational groups). An additional aim was to explore the relationships between biographic characteristics (gender, age, work experience, employment level, and occupation) and burnout. The results of the confirmatory analyses show us that all three models fit the data almost acceptably, both in the total sample (N=998) and in the separate occupational groups, and that the fit of the three-factor solution appears to be somewhat better than that of the one- and two-factor solutions. When the initial model failed to fit the data well, we had to eliminate two items with weak reliability. The results then confirmed the factorial validity of the MBI-GS—as expected, the MBI-GS consists of three scales that are moderately correlate.
Źródło:
Polish Psychological Bulletin; 2011, 42, 2; 86-94
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Walidacja tabel dekompresyjnych w oparciu o rozkład dwumianowy
Validation of diving decompression tables by means of binomial distribution
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/366193.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
walidacja
dekompresja
validation
decompression
Opis:
Systematyka i opis zjawisk towarzyszących dekompresji jest sprawą skomplikowaną ze względu na brak precyzyjnych metod pomiarowych monitorujących procesy zachodzące w tkankach żywego organizmu. Matematyczne sposoby opisu dekompresji odzwierciedlają jedynie część zachodzących podczas niej zjawisk. Opis taki polega najczęściej na możliwie jak najdokładniejszym dopasowaniu do danych eksperymentalnych stosunkowo prostej funkcji matematycznej. Takie modele matematyczne należy traktować jedynie jako sposób przewidywania programu dekompresji, nie zaś jako model zachodzących podczas niej procesów fizjologicznych [2]. Proces walidacji polega na zweryfikowaniu na podstawie danych z eksperymentów założeń dotyczących zagrożenia chorobą ciśnieniową - DCS. Materiał zawarty w artykule opracowano w ramach pracy pt.: "System głębokowodnych nurkowań trimiksowych1".
The systematic study of the phenomena accompanying decompression is complex problem because of a lack of precise measurement methods to monitor the processes taking place in body tissues. The mathematical models used to describe the decompression process, reflect only a fragmentary part of the total phenomena taking place. They usually consist of trying to fit experimental data by means of relatively simple mathematical functions. Such mathematical models, however, should be treated as calculation methods for deriving decompression procedures, not as mathematical models of the physiological processes taking place during decompression [2]. The validation process is to verify the assumptions made in the decompression model by establishing a decompression sickness (DCS) risk function based on experimental dive data. This paper presents the result of a project entitled: "Deep Diving Trimix System", sponsored by the Naval Academy, Gdynia.
Źródło:
Polish Hyperbaric Research; 2006, 1(14); 59-73
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of an online questionnaire of vocabulary learning strategies for ESL learners
Autorzy:
Gu, Peter Yongqi
Powiązania:
https://bibliotekanauki.pl/articles/780526.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
vocabulary learning strategies
questionnaire validation
Opis:
This article reports on the updating and validation of a questionnaire for vocabulary learning strategies. An English as a second language (ESL) version of the Vocabulary Learning Questionnaire (VLQ), first published in Gu and Johnson (1996), was created based on its latest version. Two response formats were piloted, that is, a paper version with a 7-point Likert scale and an online version with a 100-point slider bar. A series of validation procedures resulted in a 62-item instrument which was then administered online among 682 English language learners at the tertiary level in China. The paper presents evidence of content validity, construct validity, internal consistency reliability, and predictive validity. It also provides suggestions for interpreting and using the questionnaire for both research and instructional purposes.
Źródło:
Studies in Second Language Learning and Teaching; 2018, 8, 2; 325-350
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer-Aided project of the progressive gears installation validation workstation
Autorzy:
Lonkwic, P.
Powiązania:
https://bibliotekanauki.pl/articles/117677.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
gear
installation
computer validation system
Opis:
In reply to the Polish market demand and the increase of competitiveness in the lifting sector the innovative construction of CHP 2000 type gear with changeable loading capacity configuration has been created. Computer-aided project of the workstation to validate the installation of a friction lift brake (the gear) in the production conditions is presented in the research study. The construction and the operation scheme of the lift braking system are described. Methodology of validation has been proposed at the stage of production on the basis of variability of the production demand for the presented model of the progressive gear.
Źródło:
Applied Computer Science; 2015, 11, 1; 5-14
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of the UHPLC-DAD method for simultaneous determination of four active pharmacological ingredients in cannabinoid plant material
Autorzy:
Zalewski, Przemysław
Krause, Anna
Milewski, Marek
Wielgus, Karolina
Szalata, Milena
Słomski, Ryszard
Piontek, Judyta C.
Powiązania:
https://bibliotekanauki.pl/articles/895446.pdf
Data publikacji:
2018-08-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
validation
UHPLC-DAD
cannabinoid extract
Opis:
A stability-indicating ultra-high-performance liquid chromatography (UHPLC) with DAD detector was developed and validated for the simultaneously determination of Δ9-tetahydrocannabitol (THC), cannabidiol (CBD), Δ9-tetahydrocannabinolic acid (THC-COOH) and cannabidiolic acid (CBD-COOH) in extracts of Cannabis sativa L.. The separation was achieved on a Kinetex, C18, 100 x 2.1 mm, 2.6 µm. The gradient separation was started with mixture of methanol and 12mM ammonium acetate in ratio 75:25 (%/%). The methanol was increased to 100% from 0.0 min to 10.0 min, then maintained 100% for the next 1.0 min, then decreased to 75% from 11.0 min to 15.0 min and held at 75% from 15.0 min to 20.0 min. The injection volume was 5.0 µL and the wavelength of detection was controlled at 228 nm.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 4; 885-890
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An evaluation of the discriminatory power of selected Polish bankruptcy prediction models as part of the validation process
Autorzy:
Nehrebecka, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/949106.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
bankruptcy prediction
discriminatory power
validation
Opis:
The purposes of this article are to present validation techniques according to their discriminatory power, while indicating the reservations about such techniques, and to check the adjustment of the existing Polish bankruptcy prediction models in the context of their discriminatory power. This is the first study that performs a validation of such models. Based on the analysis, it was found that the fifth model developed by Hadasik was characterised by a very high discriminatory power. The decision was made to base the evaluation of the discriminatory power of the modules on the Gini index, the Kolmogorov-Smirnov statistic, the H measure, the information value (IV), and the precision of the estimates of bankruptcy.
Źródło:
Financial Sciences. Nauki o Finansach; 2018, 23, 4; 63-88
2080-5993
2449-9811
Pojawia się w:
Financial Sciences. Nauki o Finansach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Validation of The Inventory of Attitude Toward Social Innovation
Autorzy:
Pasikowski, Slawomir
Zajda, Katarzyna Karolina
Powiązania:
https://bibliotekanauki.pl/articles/1969355.pdf
Data publikacji:
2018-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
attitudes
social innovation
measurement
validation
Opis:
The article presents the results of validation studies on the Inventory of Attitudes Towards Social Innovation. The measurement was conducted on public institution employees and members of non-governmental organizations, i.e., people who, due to their professional or social roles, participate in resolving local social problems. The study was conducted using cross-validation. Factor structure, internal consistency of the test and subscales, and stability over time were assessed using the test-retest method. The results indicate a three-factor structure of the phenomenon, as well as satisfactory psychometric properties of the inventory.
Źródło:
The New Educational Review; 2018, 53; 49-61
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acquisition and tracking of Galileo IOV E5 signals: experimental results and performance evaluation
Autorzy:
Margaria, D.
Fantino, M.
Musumeci, L.
Powiązania:
https://bibliotekanauki.pl/articles/320705.pdf
Data publikacji:
2012
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
Galileo
validation
signal-in-space
Opis:
An assessment of the Galileo In-Orbit Validation (IOV) signals on the E5 band is presented in this paper, investigating the signal features compared with the expected characteristics as described in the Galileo Interface Control Document (ICD) specifications. In detail, the results in terms of signal acquisition and tracking during multiple satellite passes are discussed, providing also a description of the experimental setup used in order to separately receive and process E5a and E5b signals. The analysis covers the received signal strength versus the satellite elevation, the modulation format, and the presence of navigation data and secondary code chips. Since at time of writing both the two Galileo IOV satellites (PFM and FM2) are broadcasting E5 signals, the results obtained processing their E5a and E5b signals are discussed. In addition, these signals are also compared with those currently transmitted by the two experimental Galileo satellites, GIOVE-A and GIOVE-B.
Źródło:
Annual of Navigation; 2012, No. 19, part 1; 105-120
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Walidacja oprogramowania współrzędnościowych maszyn pomiarowych
Validation of the CMM software
Autorzy:
Nieciąg, H.
Tabisz, R. A.
Powiązania:
https://bibliotekanauki.pl/articles/155798.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
walidacja
systemy pomiarowe
współrzędnościowe maszyny pomiarowe
walidacja oprogramowania
validation
measurement systems
CMMs
software validation
Opis:
Zaproponowano ogólną metodologię walidacji oprogramowania systemów pomiarowych. Przedstawiono możliwość zastosowania tej metodologii do walidacji oprogramowania współrzędnościowych maszyn pomiarowych (WMP). Maszyny te stanowią bardzo ważne wyposażenie pomiarowe w przemyśle, stosującym zaawansowane technologie. Aktualnie brakuje ujednoliconych procedur walidacji oprogramowania tego rodzaju systemów. Publikacja jest wynikiem pierwszego wspólnego podejścia autorów do ujednolicenia działań dotyczących walidacji oprogramowania WMP. Głównymi etapami proponowanej metodologii są: dekompozycja oprogramowania na części, moduły i komponenty, określenie fazy realizacji komponentu, ustalenie kategorii ryzyka, wyspecyfikowanie wymagań, opracowanie procedury walidacji odpowiedniej dla ocenianego komponentu, przeprowadzenie walidacji i wygenerowanie jej certyfikatu.
A general validation methodology for measurement system software is proposed. The possibility of applying this methodology to validation of the software of coordinate measuring machines (CMM) is presented. These machines are important measurement equipment of industrial plants using advanced technologies. Up to now there have not been developed unified and standardized procedures for software validation of such systems. The publication is the result of the authors' joined approach to developing the unified validation methodology of the CMMs software. The main stages of the proposed methodology are: decomposition of the software into parts, modules and components, specifying the requirements, development of the validation procedure appropriate to the assessed component. Since the requirements can be different for each type of the software component subjected to validation, the software examination should be carried in accordance to them. The necessary stage is preparation and generation of the validation certificate.
Źródło:
Pomiary Automatyka Kontrola; 2011, R. 57, nr 12, 12; 1611-1616
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of System Dynamics Models – a Case Study
Autorzy:
Lemke, Justyna
Łatuszyńska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/475155.pdf
Data publikacji:
2013
Wydawca:
Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
Tematy:
validation of simulation models
system dynamics
Opis:
The purpose of this article is the analysis of the system dynamics model validation illustrated by the example of a model of the manufacturing resource allocation. In the first part of the article the authors present an overview of the definitions of validation and verification that can be found in the reference literature. Also, they emphasize the role which validation and verification play in the modeling process. Furthermore, they discuss the techniques of system dynamics model validation with particular focus on tests of the model structure, behavior and policy implications. The second part of the article contains an example of the validation process of a system dynamics model simulating manufacturing resource allocation in an electronic company. The purpose of the model is to assess the long-term effect of assigning workers to individual tasks on such production process parameters as efficiency or effective work time. The authors focus their particular attention on that part of the model which deals with a storehouse, one of the company production units. They conduct tests of its structure and behavior. When validating the structure the authors make use of the information obtained in a series of interviews with the company staff. They also refer to the generally accepted knowledge found in the reference literature. The results generated by the model in the course of the behavior tests are compared with the real data. The authors evaluate both the logic of the system behavior and the level of accuracy of the output data in reference to the real system.
Źródło:
Journal of Entrepreneurship, Management and Innovation; 2013, 9, 2; 45-59
2299-7075
2299-7326
Pojawia się w:
Journal of Entrepreneurship, Management and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 339

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