Temat: validation - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The universal validation algorithm of coordinate measuring methods
Autorzy:: Gromczak, K.
Ostrowska, K.
Gąska, A.
Sładek, J.
Tematy:: validation algorithm
validation model
coordinate measuring methods; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/114675.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Submodel of bypass flow in cracking soils. Part 2. - Experimental validation
Autorzy:: Walczak, R.T.
Sobczuk, H.
Slawinski, C.
Tematy:: bypass flow
flow mechanism
validation
soil crack
experimental validation
moisture content
numerical validation
water content; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/24990.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Opracowanie i walidacja metody chromatograficznej do badania fotostabilności nadyfloksacyny
Chromatographic method for testing the photostability of nadifloxacin, development and validation
Autorzy:: Rudnicka, Magdalena
Opis:: Nadifloxacin belongs to the second generation of fluoroquinolones which act by blocking topoisomerase II and IV, resulting in inhibition of DNA replication and death of the bacterial cell. It is mainly used in external forms of single-component and combined drugs with an indication of skin and soft tissue infections of bacterial etiology. The main purpose of this work was to develop a thin-layer chromatography method with densitometric detection and its validation, to determine nadifloxacin next to its photodegradation products. The stationary phase was HPTLC LiChrospher plates and the mobile phase was a mixture of dichloromethane - ethanol - toluene - 25% ammonia - n-butanol - water (6: 6: 2: 1.8: 3: 1 v/v/v/v/v/v) on the path of 95mm. Densitometric detection was performed using a wavelength of 288 nm.The method was validated. The linear range was 0.0600 to 0.1200 mg / spot and has a good correlation coefficient r = 0.98220. The method is highly sensitive - LOD is 0.0142 mg / spot, LOQ is 0.0429 mg / spot. What’s more it is specific and precise - the RSD value for precision does not exceed 1.09%, while for intermediate precision does not exceed 1.99%. The above data prove that the developed method enables the determination of nadifloxacin next to its photodegradation products.Moreover, the susceptibility of nadifloxacin to the process of photodegradation under the influence of UV radiation was tested. Based on the results, it was found that this process follows the kinetics of the first order reaction.
Nadyfloksacyna należy do drugiej generacji fluorochinolonów. Swoją przeciwbakteryjną aktywność uzyskuje w mechanizmie blokady topoizomerazy II i IV skutkując zahamowaniem syntezy DNA i obumarciem komórki bakterii. Stosowana jest głównie w zewnętrznych postaciach leków jednoskładnikowych i złożonych ze wskazaniem infekcji skóry i tkanek miękkich o etiologii bakteryjnej.W niniejszej pracy skupiono się na opracowaniu metody chromatografii cienkowarstwowej z detekcją densytometryczną, oraz jej walidacji, dzięki której można oznaczać nadyfloksacynę obok produktów jej fotodegradacji.Fazę stacjonarną stanowiły płytki chromatograficzne HPTLC LiChrospher a fazę ruchomą mieszanina o składzie: dichlorometan – etanol – toluen – amoniak 25% – n-butanol – woda (6:6:2:1,8:3:1 v/v/v/v/v/v) na drodze 95 mm. Detekcję densytometryczną prowadzono stosując długość fali 288 nm.Walidując metodę wykazano, że jest ona liniowa w zakresie od 0,0600 do 0,1200 mg/ plamkę oraz posiada dobry współczynnik korelacji r= 0,98220. Ponadto cechuję ją duża czułość LOD wynosi 0,0142 mg/plamkę a LOQ wynosi 0,0429 mg/plamkę. Metoda jest specyficzna oraz precyzyjna -wartość RSD dla precyzji nie przekracza 1,09%, natomiast dla precyzji pośredniej 1,99%. Powyższe dane świadczą o tym, że opracowana metoda umożliwia oznaczenie nadyfloksacyny obok produktów jej fotodegradacji.Ponadto, sprawdzono podatność nadyfloksacyny na proces fotodegradacji pod wpływem promieniowania UV. Na podstawie wyników stwierdzono, że proces ten zachodzi on zgodnie z kinetyką dla reakcji pierwszego rzędu.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

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Skocz do pozycji: 4.

Tytuł:: Some aspects of validation of the fuel consumption measurement method
Autorzy:: Taubert, S.
Majerczyk, A.
Tematy:: fuel consumption
validation; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/244622.pdf Link otwiera się w nowym oknie
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
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Psychometric properties of the French versions of the Perceived Stress Scale
Autorzy:: Lesage, Francois-Xavier
Berjot, Sophie
Deschamps, Frederic
Tematy:: stress
scale
validation; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/2180101.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Suggestibility Among the Indian Youth – A Validation Study of Multidimensional Iowa Suggestibility Scale
Autorzy:: Agarwal, Sanchi Pawankumar
Gawali, Gautam
Puranik, Deepti
Tematy:: suggestibility
validation
MISS
personality; Pokaż więcej
Wydawca:: Wydawnictwo Adam Marszałek
Powiązania:: https://bibliotekanauki.pl/articles/29520509.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Walidacja tabel dekompresyjnych w oparciu o rozkład dwumianowy
Validation of diving decompression tables by means of binomial distribution
Autorzy:: Kłos, R.
Tematy:: walidacja
dekompresja
validation
decompression; Pokaż więcej
Wydawca:: Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Powiązania:: https://bibliotekanauki.pl/articles/366193.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 8.

Tytuł:: The Maslach Burnout Inventory–General Survey: validation across different occupational groups in Poland
Autorzy:: Chirkowska-Smolak, Teresa
Kleka, Pawel
Tematy:: burnout
MBI-GS
validation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/430627.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: Validation of an online questionnaire of vocabulary learning strategies for ESL learners
Autorzy:: Gu, Peter Yongqi
Tematy:: vocabulary learning strategies
questionnaire validation; Pokaż więcej
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/780526.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Computer-Aided project of the progressive gears installation validation workstation
Autorzy:: Lonkwic, P.
Tematy:: gear
installation
computer validation system; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/117677.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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