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Tytuł:
The Structure of Goal Contents Revisited. A Verification of the Model in Polish Samples
Autorzy:
Górnik-Durose, Małgorzata
Jach, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2128336.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
goals
Self-Determination Theory
Aspiration Index
Opis:
The article presents an attempt to confirm the circumplex structure of goal contents, identified in 15 cultures around the world (Grouzet et al., 2005), in nine Polish samples. The procedure followed steps from the original study and included testing the assumed 11-factor goal structure and the two-dimensional circular organization of the goal contents. None of the analyses showed outcomes that would explicitly confirm the results attained in the original study. The CFA showed rather poor fits. Results of the MDS generally supported the assumption about the two-dimensional goal contents structure, however ipsative distance analysis reproduced only one of the two assumed dimensions. Finally, although the CIRCUM analysis showed in principle that in the Polish sample the organization of goal contents on the circumference was quite similar to original, the RMSEA indicated poor fit. Methodological and conceptual reasons for the replication failure are analyzed and discussed.
Źródło:
Polish Psychological Bulletin; 2016, 4; 451-463
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic set of experiments for determination of mechanical properties of sand
Autorzy:
Sawicki, A.
Mierczyński, J.
Świdziński, W.
Powiązania:
https://bibliotekanauki.pl/articles/202447.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
granular soils
mechanical properties
experimental determination
Opis:
A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 129-137
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of the Voluntary Participation in Online Surveys Scale
Autorzy:
Kaczmarek, Łukasz D.
Haładziński, Piotr
Kaczmarek, Lech
Bączkowski, Błażej
Ziarko, Michał
Dombrowski, Stephan U.
Powiązania:
https://bibliotekanauki.pl/articles/430343.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
motivation
response rate
web-based surveys
Self-Determination Theory
Opis:
A comprehensive understanding of participants’ motives to complete web-based surveys has the potential to improve data quality. In this study we tested the construct validity of a scale developed to measure motivation to participate in webbased surveys. We expected that 7 different motivations observed in our previous study will form a 3-factor structure, as predicted by Self-Determination Theory. This web-based questionnaire study comprised 257 participants completing the Voluntary Participation in Online Studies Scale. Their responses to 21 items underwent a principal component analysis and confi rmatory factor analysis. As we expected, three factors were identifi ed: intrinsic motivation, extrinsic motivation and amotivation. In line with Self-Determination Theory there are three distinct groups of motives among web-surveys participants with amotivation as an understudied motivational state. We discuss the results suggesting which types of motivation might lead to higher quality of data with an emphasis on possible negative effects of amotivation.
Źródło:
Polish Psychological Bulletin; 2012, 43, 3; 210-214
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of positive realizations with reduced numbers of delays or without delays for discrete-time linear systems
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/229361.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
state diagram method
determination
linear
discrete-time
delay
realization
Opis:
A new modified state variable diagram method is proposed for determination of positive realizations with reduced numbers of delays and without delays of linear discrete-time systems for a given transfer function. Sufficient conditions for the existence of the positive realizations of given proper transfer function are established. It is shown that there exists a positive realization with reduced numbers of delays if there exists a positive realization without delays but with greater dimension. The proposed methods are demonstrated on a numerical example.
Źródło:
Archives of Control Sciences; 2012, 22, 4; 451-465
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of various methods for determination of antifungal activity of Bacillus coagulans
Autorzy:
Czaczyk, K.
Trojanowska, K.
Stachowiak, B.
Zabielski, J.
Powiązania:
https://bibliotekanauki.pl/articles/65912.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
antifungal activity
determination
ergosterol
Bacillus coagulans
pathogenic fungi
fungi
method
Źródło:
Journal of Plant Protection Research; 2002, 42, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trajectory determination for pipelines using an inspection robot and pipeline features
Autorzy:
Zhang, Shuo
Dubljevic, Stevan
Powiązania:
https://bibliotekanauki.pl/articles/1849012.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
trajectory determination
pipeline inspection robot
pipeline feature
path reconstruction algorithm
Opis:
Geographic trajectory of a pipeline is important information for pipeline maintenance and leak detection. Although accurate trajectory of a ground pipeline usually can be directly measured by using global positioning system technology, it is much difficult to determine trajectory for an underground pipeline where global positioning system signal cannot be received. In this paper, a new method to determine trajectory for an underground pipeline by using a pipeline inspection robot is proposed. The robot is equipped with a low-cost inertial measurement unit and odometers. The kinematic model, measurement model and error propagation model are established for estimating position, velocity and attitude of the robot. The path reconstruction algorithm for the robot is proposed to improve accuracy of trajectory determination based on pipeline features. The experiment is given to illustrate that the position errors of the proposed method are less than 40% of that of the standard extended Kalman filter.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 439-453
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trajectory determination for pipelines using an inspection robot and pipeline features
Autorzy:
Zhang, Shuo
Dubljevic, Stevan
Powiązania:
https://bibliotekanauki.pl/articles/1849098.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
trajectory determination
pipeline inspection robot
pipeline feature
path reconstruction algorithm
Opis:
Geographic trajectory of a pipeline is important information for pipeline maintenance and leak detection. Although accurate trajectory of a ground pipeline usually can be directly measured by using global positioning system technology, it is much difficult to determine trajectory for an underground pipeline where global positioning system signal cannot be received. In this paper, a new method to determine trajectory for an underground pipeline by using a pipeline inspection robot is proposed. The robot is equipped with a low-cost inertial measurement unit and odometers. The kinematic model, measurement model and error propagation model are established for estimating position, velocity and attitude of the robot. The path reconstruction algorithm for the robot is proposed to improve accuracy of trajectory determination based on pipeline features. The experiment is given to illustrate that the position errors of the proposed method are less than 40% of that of the standard extended Kalman filter.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 439-453
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new method for computation of positive realizations of fractional linear continuous-time systems
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/229767.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
determination
positive
realization
transfer matrix
linear
continuous-time
fractional system
Opis:
A new method for computation of positive realizations of given transfer matrices of fractional linear continuous-time linear systems is proposed. Necessary and sufficient conditions for the existence of positive realizations of transfer matrices are given. A procedure for computation of the positive realizations is proposed and illustrated by examples.
Źródło:
Archives of Control Sciences; 2018, 28, 4; 511-525
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapid determination of lactic acid in anaerobic biological treatment process using a portable sensitive lactate biosensor
Autorzy:
Darwin, D.
Powiązania:
https://bibliotekanauki.pl/articles/80265.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rapid determination
lactic acid
lactate concentration
lactate biosensor
anaerobic digestion
acidification
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2019, 100, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intrinsic Motivation Predicting Performance Satisfaction in Athletes: Further Psychometric Evaluations of the Sport Motivation Scale-6
Autorzy:
Blecharz, Jan
Horodyska, Karolina
Zarychta, Karolina
Adamiec, Aleksandra
Luszczynska, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/430449.pdf
Data publikacji:
2015-06-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sport
intrinsic motivation
self-determination theory
self-efficacy
satisfaction
psychometric characteristics
Opis:
The study investigated psychometric properties of the Sport Motivation Scale-6 (SMS-6), assessing intrinsic regulation, four extrinsic regulation constructs, and amotivation among athletes competing at a regional and national level. In particular, we tested the factorial structure of SMS-6, its short-term stability, and the associations of SMS-6 constructs with self-efficacy, self-esteem, motivational climate, and satisfaction with sport performance. Participants were 197 athletes (57.4% women), representing team (54.7%) and individual disciplines. The measurement was repeated at the three-week follow-up (n = 107). Results yielded support for the six first-order factor structure (three second-order factors). More autonomous forms of motivation were related to higher levels of self-efficacy, performance satisfaction, and taskoriented motivational climate in sport organizations. Sequential multiple mediation analysis showed that the association between general self-efficacy and performance satisfaction at a follow-up was mediated by introjected regulation and personal-barrier self-efficacy.
Źródło:
Polish Psychological Bulletin; 2015, 46, 2; 309-319
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the share of components of different ploidy in anisoploid sugar-beet [Beta vulgaris L.] populations by flow cytometry
Autorzy:
Sliwinska, E
Jansen, R
Powiązania:
https://bibliotekanauki.pl/articles/2046829.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Beta vulgaris
ploidy determination
breeding
flow cytometry
seed production
sugar-beet
Opis:
Flow cytometry is commonly used in sugar-beet breeding and seed production for ploidy estimation. By means of this method individual plants as well as plant populations can be analysed. An interpretation of histograms obtained from anisoploid populations, however, causes some problems to the breeder. Bulks of diploid, triploid and tetraploid sugar-beet plants in different proportion and ploidy combinations (2x + 3x, 2x + 4x, and 3x + 4x) were tested in order to determine the relation between the actual share of the components of different ploidy levels in tested populations and that calculated on the basis of flow cytometry. In this way agraph for estimation of the share of different ploidy components was obtained. Repeatability of the results proves the usefulness of flow cytometric analysis of anisoploid plant populations in breeding and seed production of polyploid crops.
Źródło:
Journal of Applied Genetics; 1997, 38, 2; 151-160
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-Frame Attitude Determination Methods for Nanosatellites
Autorzy:
Cilden Guler, D.
Conguroglu, E. S.
Hajiyev, C.
Powiązania:
https://bibliotekanauki.pl/articles/221643.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
attitude determination
single-frame methods
algebraic method
covariance analysis
vector observation
Opis:
Single-frame methods of determining the attitude of a nanosatellite are compared in this study. The methods selected for comparison are: Single Value Decomposition (SVD), q method, Quaternion ESTimator (QUEST), Fast Optimal Attitude Matrix (FOAM) − all solving optimally the Wahba’s problem, and the algebraic method using only two vector measurements. For proper comparison, two sensors are chosen for the vector observations on-board: magnetometer and Sun sensors. Covariance results obtained as a result of using those methods have a critical importance for a non-traditional attitude estimation approach; therefore, the variance calculations are also presented. The examined methods are compared with respect to their root mean square (RMS) error and variance results. Also, some recommendations are given.
Źródło:
Metrology and Measurement Systems; 2017, 24, 2; 313-324
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships among Orientation to Exercise, Personality, Well-being, and Self-Efficacy among Recreational Runners
Autorzy:
Cypryańska, Marzena
Nezlek, John B.
Powiązania:
https://bibliotekanauki.pl/articles/2127353.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
exercise motivation
well-being
Self Determination Theory
diary study
BFI-44
Opis:
Participants in the study were recreational runners who completed measures of their orientation to exercise, the Five Factor Model of personality, self-efficacy as a specific adaptation (a socio-cognitive construct of personality) and measures of subjective well-being (life satisfaction) and eudaimonic well-being (life engagement). Consistent with previous research, task-oriented (internally focused) motivation to exercise was positively related to extraversion and to conscientiousness, and ego-oriented (externally focused) motivation was positively related to extraversion. Also consistent with previous research, self-efficacy and measures of well-being were positively related to extraversion and conscientiousness. Mediational analyses found that well-being mediated relationships between task-oriented motives and both extraversion and conscientiousness. Self-efficacy mediated the relationship between ego-oriented motives and extraversion. The implications of these results for the study individual differences in exercise motivation are discussed.
Źródło:
Polish Psychological Bulletin; 2018, 49, 2; 158-165
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quaternion-based filtering for gyroless attitude estimation without an attitude dynamics model
Autorzy:
Zhang, S.
Xing, F.
Sun, T.
You, Z.
Powiązania:
https://bibliotekanauki.pl/articles/220655.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quaternion-based filtering
gyroless attitude estimation
angular velocity determination
Kalman filter
Opis:
Conventionally, the filtering technique for attitude estimation is performed using gyros or attitude dynamics models. In order to extend the application range of an attitude filter, this paper proposes a quaternion-based filtering framework for gyroless attitude estimation without an attitude dynamics model. The attitude estimation system is established based on a quaternion kinematic equation and vector observation models. The angular velocity in the system is determined through observation vectors from attitude sensors and the statistical properties of the angular velocity error are analysed. A Kalman filter is applied to estimate the attitude error such that the effect from the angular velocity error is compensated with its statistical properties at each sampling moment. A numerical simulation example is presented to illustrate the performance of the proposed algorithm.
Źródło:
Metrology and Measurement Systems; 2018, 25, 3; 631-643
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Components of quantitative resistance in barley plants to Fusarium head blight infection determined using three in vitro assays
Autorzy:
Sakr, N.
Powiązania:
https://bibliotekanauki.pl/articles/66494.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
quantitative resistance
barley plant
Fusarium
head blight
plant infection
determination
detached leaf
Opis:
Quantitative resistance in barley to four Fusarium head blight (FHB) species was investigated in vitro. Nine components involved in three assays (detached leaf, modified Petridish and seedling tests) were compared on two widely grown Syrian barley cultivars: Arabi Aswad (AS) and Arabi Abiad (AB). On AB, inoculation with FHB species resulted in a significantly shorter latent period and larger lesion length of detached leaf inoculation, more standardized area under disease progress curve (AUDPCstandard) of modified Petridish inoculation and a higher percentage of infected seedlings of pin-point inoculation than on AS. The latent period of AB was 14.89% less than AS, lesion length of AS was 6.01% less than AB, AUDPCstandard of AS was 17.07% less than AB and the percentage of infected seedlings of AS was 4.87% less than AB. Inoculation with FHB species resulted in no significant differences in the other five components measured: incubation period of detached leaf inoculation, germination rate reduction and coleoptile length reduction of modified Petridish inoculation, percentage of infected seedlings of foliar-spraying inoculation and lesion length of clip-dipping inoculation. AS was more resistant to in vitro FHB infection than AB. The latent period and AUDPCstandard recorded the highest values compared with the lowest values for lesion length and percentage of infected seedlings. It seems that measurement of the latent period and AUDPCstandard may be useful in identifying barley cultivars which are highly susceptible or resistant to FHB at early stages.
Źródło:
Journal of Plant Protection Research; 2018, 58, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 40

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