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Wyświetlanie 1-15 z 235
Tytuł:
The nation-state and the multicultural society
Autorzy:
Sadowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/703486.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
national state
multinational state
multicultural society
Opis:
In the article, the author presents the basic relations between a nation state and a multicultural society. According to the author, the attitude of the nation state and the dominant nation in the state to the phenomenon of cultural diversity of society is a key phenomenon in the theory and practice of multiculturalism. Namely, the nation state is characterized by two strategies defining the attitude to the cultural diversity of society. It is a strategy of cultural homogenization and a pluralistic. The emergence of a pluralistic strategy begins with the occurrence and eventual growth of phenomena and processes referred to as multiculturalism and multicultural society.
Źródło:
Nauka; 2019, 3
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Modeling of Plastic Working Conditions for Rods of 7xxx Series Aluminum Alloys
Autorzy:
Dyja, H.
Bajor, T.
Laber, K.
Tussupkaliyeva, E.
Powiązania:
https://bibliotekanauki.pl/articles/356651.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloys
state of deformation
torsion test
tensile test
complex deformation state
Opis:
The continuing high level of demand for lightweight structural materials is the reason for the ever-growing interest in aluminum alloys. The main areas of application for aluminum alloys products are the aerospace and automotive industries. Production of profiles and structural elements from lightweight alloys gives possibility to reduce the curb weight of construction, which directly translates into among other reduction of fuel consumption and lower amount of generated exhaust gas. Determination of heat treatment and plastic working parameters to obtain the required mechanical properties of the manufactured products is a complex process that requires among others knowledge of the material behavior during the deformation process. To carry out the study the torsion plastometer STD 812 was used. On the basis of obtained results of the research the value of the yield stress, formability limit and the thermal effect of the deformed 7xxx series aluminum alloy were specified for different schemes and conditions of deformation.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 515-521
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Discrete-time switching state-space controller of DC drive
Autorzy:
Sieklucki, G.
Bisztyga, B.
Sykulski, R.
Zdrojewski, A.
Orzechowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/230000.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
DC drive
state variable constraints
switching gain matrix controller
state variables controller
Opis:
Control synthesis with state variables constraints for the DC drive is considered. Constraints are defined for the specific operating states of the DC motor during starting and braking in the presence of selected specific conditions. The control signal is based on the reference values and current state of the motor. The inverse dynamics method is applied. Closed-loop control law is realized by means of switching state-space controller.
Źródło:
Archives of Control Sciences; 2013, 23, 3; 333-349
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offset-free nonlinear Model Predictive Control with state-space process models
Autorzy:
Tatjewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/229638.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear control
predictive control
offset-free control
state-space model
state estimation
Opis:
Offset-free model predictive control (MPC) algorithms for nonlinear state-space process models, with modeling errors and under asymptotically constant external disturbances, is the subject of the paper. The main result of the paper is the presentation of a novel technique based on constant state disturbance prediction. It was introduced originally by the author for linear state-space models and is generalized to the nonlinear case in the paper. First the case with measured state is considered, in this case the technique allows to avoid disturbance estimation at all. For the cases with process outputs measured only and thus the necessity of state estimation, the technique allows the process state estimation only - as opposed to conventional approach of extended process-and-disturbance state estimation. This leads to simpler design with state observer/filter of lower order and, moreover, without the need of a decision of disturbance placement in the model (under certain restrictions), as in the conventional approach. A theoretical analysis of the proposed algorithm is provided, under applicability conditions which are weaker than in the conventional approach. The presented theory is illustrated by simulation results of nonlinear processes, showing competitiveness of the proposed algorithms.
Źródło:
Archives of Control Sciences; 2017, 27, 4; 595-615
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Dilemmas of Policy Towards Return Migration. The Case of Poland After the EU Accession
Autorzy:
Lesińska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/498653.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
return migration
state policy
Polska
Opis:
The article introduces the theoretical approach to analysing return migration policy and discusses the main dilemmas of the state related to political reaction to returns of its nationals. The concept of reactive and active policy is presented, the first aiming at minimising the negative effects of returns, while the second focused on stimulating the return processes. The main drivers and determinants of the return policy effectiveness as well as the types, scope and scale of state activities addressed to returnees are also discussed in the article. The practice of state policy implementation is illustrated with the example of the particular case of Poland as a country which faced mass emigration after accession to the European Union and return migration in the recent years. The review of conceptual documents, the rationale for the state policy and the variety of activities implemented by the Polish government and other institutions are presented.
Źródło:
Central and Eastern European Migration Review; 2013, 2, 1; 77-90
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sniffing the mood for cooperation: Personality and odor induced affective states effects
Autorzy:
Marchlewska, Marta
Czerniawska, Ewa
Oleksiak, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/430690.pdf
Data publikacji:
2016-06-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cooperation
odorants
affective state
personality
Opis:
The paper explores situational and dispositional underpinnings of cooperative behavior. According to psychological research, cooperation is strongly related to affective states (Forgas, 1998) and personality dimensions (Volk, Thöni, & Ruigrok, 2011). In an experimental study we examined the conditions under which people cooperate with each other. The dispositional traits of co-workers (personality), the contribution to a collaborative effort, and a situational factor – ambient odor condition were taken into consideration. A one-way ANOVA revealed that compared to a malodorous condition, both the pleasant odor condition and the natural odor condition showed higher rates of cooperation. Further analysis indicated that only malodors influenced affective states which in turn determined social decisions. Although we found effects for the participants’ agreeableness and the coworker’s contribution to a joint work, they appeared to play a less critical role than affective states induced by the experimental odor conditions tested here.
Źródło:
Polish Psychological Bulletin; 2016, 47, 2; 220-227
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The origins of the Polish state in new light
Autorzy:
Jasiński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/703624.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
origin of the Polish state
dendrochronology
Opis:
Dendrochronological analyses undertaken in the 1990s allowed for the establishment of a new time-line in determining a more precise date for the origins of the Polish state. It appeared from these data that the creation of the Polish state occurred much later than it had been thought before. The formation of the early medieval state was initiated by vast and multi-faceted cultural changes occurring on the territory of the Gniezno plateau at the turn of the 9th and the 10th century. As the culminating point of that process, one can consider the consolidation of the local population in reaction to the threat posed by the outbreak of the great uprising of the Slavs along the Elbe River in 936-940.
Źródło:
Nauka; 2007, 4
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solid State Synthesized YVO4:Dy3+/ SiO2 Composites: Microstructures and Optical Characteristics
Autorzy:
Rafiaei, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/356343.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solid state
composite
SiO2
luminescence
Opis:
In this paper YVO4:Dy3+ was synthesized via solid state method at 1100°C and effects of different quantities of SiO2 particles on microstructure and photoluminescence properties were investigated in details. To study the microstructure and properties of these composites XRD, SEM, TEM, HRTEM, XPS and PL equipments were employed. It was found that via addition of SiO2 particles to YVO4:Dy3+ phosphors, strong bonding is made between SiO2 particles and phosphors. Furthermore, based on stronger electronegativity of Si 2p element compared to Y 3d and V 2p elements, increase of SiO2 causes the increase of binding energy. Moreover, this research showed that the addition of 10 wt% SiO2 particles to YVO4:Dy3+ material enhances the excitation and emission luminescence properties, significantly. Further increase of SiO2 particles results in suppress of emission intensity.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 199-202
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Albanian Citizenship Configurations in the Balkans
Autorzy:
Krasniqi, Gezim
Powiązania:
https://bibliotekanauki.pl/articles/498675.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Albania
Kosovo
citizenship
nation-state
Europe
Opis:
This paper examines the Albanian state–nation constellation in the Balkans in the light of the European Union (EU) integration process with a focus on citizenship configurations in Kosovo and Albania. It addresses an important puzzle: why legal norms of citizenship do not follow the emerging practice of stronger trans-border co-operation in the Albanian ethnic and cultural space. The study shows that the process of EU integration is the key to understanding and explaining this puzzle, for it provides an opportunity for ‘constructive ambiguity’ around which both ethnic and statist brands of Albanian nationalism, as well as various elite fractions, can coalesce and coexist. In a wider context, Albanian citizenship configurations are shaped by the ever-evolving complex relationship between nation, state and Europe.
Źródło:
Central and Eastern European Migration Review; 2017, 6, 1; 49-64
2300-1682
Pojawia się w:
Central and Eastern European Migration Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observer state feedback control of discrete-time systems with state equality constraints
Autorzy:
Filasova, A.
Krokavec, D.
Powiązania:
https://bibliotekanauki.pl/articles/229818.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
equality constraints
eigenstructure assignment
state feedback
Opis:
Design conditions for existence of observer-based memory-less feedback control for stabilization of discrete-time systems with equality constraints given on the state variables are presented in the paper. These conditions are associated with eigenstructure assignment based on the singular value decomposition principle. The validity of the proposed method is demonstrated by a numerical example with the equality constraint tying together all state variables.
Źródło:
Archives of Control Sciences; 2010, 20, 3; 253-266
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attitudes of Poles towards the state
Autorzy:
Wnuk-Lipiński, Edmund
Bukowska, Xymena
Powiązania:
https://bibliotekanauki.pl/articles/704269.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
state
attitudes
egalitarism
citizen rights
democracy
Opis:
The article analyses attitudes of Poles towards the state. The attitudes are shaped by four factors: both recent and past history, experiences of the young liberal-democratic republic and opening of Poland to the world. Research, conducted on all-national sample in November, 2007, shows that for the majority of citizens of Poland state is an intrinsic value, however they have various visions of its optimal model (from nearly authoritarian to libertarian). Welfare expectations towards the state are widely spread. This attitude has strong positive affective ground, which, however, does not eliminate critical assessment of ways the state is actually functioning. Particularly the criticism is related to unequal treatment of various groups of citizens.
Źródło:
Nauka; 2008, 2
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of the Affective States During and After Cheerleading Training in Female Athletes
Autorzy:
Kovácsik, Rita
Szabo, Attila
Powiązania:
https://bibliotekanauki.pl/articles/2121552.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Activation
Affect
Exercise
emotion
Feeling state
Opis:
Cheerleading is a new sport, practiced in 110 nations; since 2016 enjoys provisional Olympic status. Its leaders claim that it is a “happy” sport, but research on its psychological effects is lacking. In this field-study we examined core-affect, positive-affect, and negative-affect in 65 cheerleaders before, during, after, and one-hour after a cheerleading training. Core-affect was more positive during and immediately after training, but it tapered off one hour following the training when feeling states were still more positive than at baseline. Negative-affect declined linearly from baseline to one-hour following training when it became significantly lower than its previous values. Positive-affect showed quadratic dynamics, in parallel with arousal, being higher during and immediately after training than during baseline, or one-hour after training. These results demonstrate for the first time that cheerleading is a “happy” sport, which apart from the skill-development also yields positive psychological emotions both during and after training.
Źródło:
Polish Psychological Bulletin; 2019, 50, 1; 29-35
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification and Estimation of Initial Conditions in Non-Minimal State-Space Models
Autorzy:
Bystrov, Victor
Powiązania:
https://bibliotekanauki.pl/articles/2075239.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
identification
latent variables
state-space model
redundancy
Opis:
In this paper the identification problem is considered for initial conditions in a non-minimal state-space model that includes interpretable state variables generated by non-stationary stochastic processes. In order to solve the identification problem, structural restrictions are imposed on initial conditions in a state-space model with redundant state variables. The corresponding restricted maximum likelihood estimator of initial conditions is derived. The restricted estimator of initial conditions can be used in order to compute uniquely identified realizations of interpretable latent variables. The identification problem is illustrated analytically using a simple structural economic model
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2020, 4; 413-429
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positive and stable electrical circuits with state-feedbacks
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/141572.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
positivity
stability
linear
electrical circuit
state-feedback
Opis:
The analysis of the positivity and stability of linear electrical circuits by the use of state-feedbacks is addressed. Generalized Frobenius matrices are proposed and their properties are investigated. It is shown that if the state matrix of an electrical circuit has generalized Frobenius form then the closed-loop system matrix is not positive and asymptotically stable. Different cases of modification of the positivity and stability of linear electrical circuits by state-feedbacks are discussed and necessary conditions for the existence of solutions to the problem are established.
Źródło:
Archives of Electrical Engineering; 2018, 67, 3; 563--578
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From Polyanna syndrome to Eeyore’s Corner? Hope and pain in patients with chronic low back pain
Autorzy:
Wojtyna, Ewa
Palt, Łukasz
Popiołek, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/430379.pdf
Data publikacji:
2015-03-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pain
hope-trait
hope-state
empathy gaps
Opis:
Chronic low back pain affects 50-80% of the population, while its consequences may impair the functioning of patients suffering from it, in many spheres of life . Hope is a factor which may influence coping with pain as well as cognitive reflection of pain experience. The aim of the study has been to check: 1) whether dependencies exist between hope-trait and hope-state and the perception of pain; 2) whether experiencing pain at the time of filling questionnaires matters for the assessment of the level of hope; 3) whether there is interaction between hope, the pain experienced at the moment of investigation, and memory of the intensity of previously experienced pain. 150 patients participated in the study, they all reported aggravation of the chronic low back pain syndrome. The study was a cross-sectional study, based on questionnaires. On the third day of treatment the subjects were given the following questionnaires: Trait Hope Scale, State Hope Scale, and Numerical Rating Scale of Pain to fill. Poor correlation was demonstrated to exist between hope-state and hope-pathways on the one hand, and the intensity of minimum pain level experienced during the first three days of treatment. It has been noted that the presence of pain at the time of filling questionnaires results in reducing the hope-state, but only in those persons, who had experienced severe pain previously. On the other hand, in case of patients who had experienced slight pain previously, the pain present when filling in the questionnaires is conducive to enhanced hope-state. The results of the study confirm the complex character of relations between hope and pain.
Źródło:
Polish Psychological Bulletin; 2015, 46, 1; 96-103
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 235

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