Skocz do pozycji: 1.

Tytuł:

Identification of the Types of Measured Acoustic Modes Inside the Operator’s Cab in a Bulldozer

Autorzy:

Dziechciowski, Z.
Kozień, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/178012.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

heavy duty machine
acoustic modes
structural modes

Opis:

The aim of the study was to identify acoustic and structural modes in the spectrum obtained exper- imentally inside an operator’s cab in a bulldozer. Measurements were taken inside the operator’s cab in a caterpillar-track bulldozer Polremaco TD12NPH2E-2000, designed for work in underground mine enclosures. The acoustic pressure spectrum was obtained for varied rotational speeds of the engine during the free run of the machine. The reverberation time of the cab was determined basing on the pulse-type excited pressure response, followed by identification of the spectral components registered by measure- ments. Thus, identified frequencies were compared with natural acoustic frequencies registered inside the operator’s cab and with frequencies associated with the valves and ignition frequencies due to rotational speed and natural frequencies of structural vibrations of the cab’s walls. This study was conducted in an attempt to reduce the noise inside the operator’s cab using passive methods.

Źródło:

Archives of Acoustics; 2014, 39, 4; 653-663
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

On the non-existence of zero modes

Autorzy:

Elton, D. M.

Powiązania:

https://bibliotekanauki.pl/articles/254785.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Weyl-Dirac operator
zero modes

Opis:

We consider magnetic fields on R3 which are parallel to a conformal Killing field. When the latter generates a simple rotation we show that a Weyl-Dirac operator with such a magnetic field cannot have a zero mode. In particular this allows us to expand the class of non zero mode producing magnetic fields to include examples of non-trivial smooth compactly supported fields.

Źródło:

Opuscula Mathematica; 2018, 38, 4; 537-556
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Prawne podstawy odpowiedzialności zawodowej pracowników ochrony zdrowia
Professional responsibility of workers of health care

Autorzy:

Kulik, Teresa Bernadetta
Jolanta, Pacian
Anna, Pacian

Powiązania:

https://bibliotekanauki.pl/articles/635306.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

HEALTH CARE
MODES OF RESPONSIBILITY
RESPONSIBILITY

Opis:

The aim of the work is to discuss the workers' professional responsibility of the health care system. Proper exercising of the right to health and the right to protect health, first of all, depends on effective and stable law which would regulate the functioning of the health care system and on well prepared workers. Apart from the level of knowledge and factual preparation to work in the profession, the determinants of the workers' qualifications of the health care system are high sensibility, both ethical and moral. Actions or nonfeasances which determine professional responsibility of workers are characterized by infringement and they violate particular obligations. Responsibility of workers of health care is one of the mechanisms which should guarantee a satisfactory level of medical services. Its aim is to make the worker, who was proved to behave improperly, improve his/her actions, especially those serious ones and the ones which are repeated. Otherwise he/she could be temporarily or permanently deprived of his/her right to practice. The doctors who possess a diploma, but they do not have the right to carry the occupation are not subject to this mode. The range of doctors' professional responsibility is defined generally and the forbidden actions are not exactly described. Nurses and midwives bear the responsibility for the whole range of professional activity, including the field of relations nurse - patient - the members of the therapeutic team. The legal responsibility means the necessity of bearing the consequences provided for by legal regulations. Dissatisfaction with the health care system is justified but very often directed in an impropriate way. Surely, the quality of the doctors' or nursing practise should be constantly improved and while improving the conditions, the responsibility should increase.

Źródło:

Zdrowie Publiczne i Zarządzanie; 2010, 8, 2; 96-100
2084-2627

Pojawia się w:

Zdrowie Publiczne i Zarządzanie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Some remarks on laghu-tattva-sphota XXI.9-24

Autorzy:

Glinicka, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/18681616.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

Jainism
Jaina
universals
particulars
substance
modes

Opis:

The article is aimed at analysis of 9–24 stanzas of XXI chapter of philosophical poem Laghu-tattva-sphoṭa, i.e. A Light Bursting of the Reality, authored by Amṛtachandra-sūri (10th c. A.D.), the Jain thinker. Chapter XXI is dedicated to the problem of universals and particulars, meaningful and influential subject of Indian, as well as Western philosophy.

Źródło:

Internetowy Magazyn Filozoficzny Hybris; 2015, 29, 2; 172-180
1689-4286

Pojawia się w:

Internetowy Magazyn Filozoficzny Hybris

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

The typology of travels in pristina in relation to purpose, time and distance

Autorzy:

Humolli, Fitim
Çinaj, Nevila
Kelmendi, Naim

Powiązania:

https://bibliotekanauki.pl/articles/1050864.pdf

Data publikacji:

2020-03-31

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

travels
travel modes
travel purpose
multimodal travel

Opis:

Similar to most cities in Europe/the world, Kosovo also faces the problem of urban mobility, which is characterised by congestion. The most concerning problems are: waste of time, money, energy consumption, environmental problems and others. They arise due to the imbalanced state of using urban mobility in Pristina (Prishtinë), while eco-travels are minor. In order to reduce these problems, this paper aimed to examine the current situation of urban mobility in Pristina by analysing the mobility indicators of cars, trains, buses, bicycles and walking, in relation to purpose, distance and time. The research methodology was the direct survey method conducted with the citizens of Pristina and daily immigrants over a week. The results of the survey showed that 44% of the participants used cars for travelling, while other transportation alternatives (soft and eco-transport) were limited and problematic. In the absence of institutional practices for collecting periodic data, the results of this study will not only contribute in filling the information gap, but also will properly address the needs for transportation planning in Pristina and design objectives for a multimodal transportation strategy in this city to lessen the negative impacts of the aforementioned problems and increase travel facilities.

Źródło:

Quaestiones Geographicae; 2020, 39, 1; 79-91
0137-477X
2081-6383

Pojawia się w:

Quaestiones Geographicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

On the stability of friction contact

Autorzy:

Mróz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/279760.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

contact friction
stability
static and dynamic modes

Opis:

The stability ocondition (1.2) for frictional contact expressed in terms of potential energy and the dissipation function is applied to analysis of the stability of rigid-sliding and elastic-sliding contacts obeying the Coulomb friction condition and the non-associated sliding rule. both static and dynamic modes are considered.
O stateczności kontaktu z tarciem Warunek (1.2) stateczności układu sprężystego z ciernym kontaktem wyrażony jest przez funkcję energii potencjalnej V(qi) i funkcję dysypacji D(qi, qk). Rozpatrzono prawo tarcia Coulomba i niestowarzyszone prawo poślizgu i zastosowano warunek stateczności do kontaktu sztywnego i z podatnością sprężystą. Określono statyczne i dynamiczne formy utraty stateczności.

Źródło:

Journal of Theoretical and Applied Mechanics; 2000, 38, 2; 315-329
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Les états du kitsch dans "Un amour de Swann" de Marcel Proust et "Les choses" de Georges Pérec
The states of kitsch in “Swann in love” by Marcel Proust and “The things” by Georges Perec

Autorzy:

Eba, Axel Richard

Powiązania:

https://bibliotekanauki.pl/articles/28407426.pdf

Data publikacji:

2023

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

kitsch
principles of kitsch
kitsch modes
objects
material culture
principes du kitsch
modes du kitsch
objets
culture matérielle

Opis:

Les romans de Marcel Proust et de Georges Pérec présentent le kitsch sous les états de principes et de modes selon la grille théorique élaborée par Abraham Moles. L’étude a puisé des ressources conceptuelles dans la Psychologie du kitsch ou L’art du bonheur pour analyser les œuvres que sont Un amour de Swann et Les choses. Si contester le social, c’est quand même s’inspirer de lui, ces œuvres ne manquent pas de faire plonger dans les réalités du XIXe et du XXe siècles. Cependant, au seuil des intrigues, l’étude s’est appesantie sur l’objet dans son acquisition, son utilisation, son positionnement, sa contemplation, sa manipulation. Ainsi, les mots techniques formulés par Abraham Moles ont offert des énoncés tels que les principes d’inadéquation, de cumulation et les modes hédoniste, surréaliste qui ont révélé leur littérarité. Le kitsch offre un ensemble d’outils linguistiques qui expliquent des phénomènes observables au niveau social et au niveau littéraire. À ce titre, l’objet devient le prisme par lequel les mentalités se définissent. Les romans de Marcel Proust et de Georges Pérec renferment des observations et des informations sociologiques rendues sous formes esthétiques à travers le procès du snobisme.
The novels of Marcel Proust and Georges Perec present kitsch under the states of principles and modes according to the theoretical grid developed by Abraham Moles. This study therefore drew conceptual resources from the Psychologie du kitsch ou l’art du bonheur in order to analyze Un amour de Swann et Les choses. If to challenge social reality still implies being inspired by it, these works do not fail to plunge into the realities of the 19th and 20th centuries. However, at the threshold of the plots, the study has focused on the object in its acquisition, its use, its positioning, its contemplation, its manipulation. Thus, the technical words formulated by Abraham Moles offered statements such as the principle of inadequacy and accumulation as well as hedonistic, surrealist modes that revealed their literality. The kitsch offers a set of linguistic tools which explain phenomena observable at the social and literary level. As such, the object becomes the prism by which mentalities are defined. The novels of Marcel Proust and George Perec contain observations and sociological information rendered in aesthetic forms through the trial of snobbery.

Źródło:

e-Scripta Romanica; 2023, 11; 61-73
2392-0718

Pojawia się w:

e-Scripta Romanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Anchorage systems in FRP - strengthened reinforced concrete

Autorzy:

Tworzewski, P.
Bacharz, K.
Michałowska-Maziejuk, D.

Powiązania:

https://bibliotekanauki.pl/articles/105140.pdf

Data publikacji:

2018

Wydawca:

Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza

Tematy:

reinforcing
strengthening
FRP
anchorage systems
failure modes

Opis:

The main aim of this article was to present recently evolved methods of strengthening flexural reinforced concrete beams, as well as the concreteanchorage system bond strength problems in composites that were either surface mounted or inserted in the pre-cut grooves in the concrete cover. The focus is on the beams strengthened with the carbon FRP (CFRP - carbon fiber reinforced polymer) composites to show the basic advantages and drawbacks associated with their installation and bond performance. Domestic and foreign experiments investigating the EBR and NSMR strengthening systems were discussed to show their efficacy, common failure modes and the factors initiating the debonding process. Debonding problems and solutions to those problems were illustrated using the example of a composite material attached to the outer surface of concrete in the shear zone of reinforced concrete beams The article provides guidelines for checking the anchorage capacity for the existing longitudinal reinforcement with the simultaneous action of bending moment and shear force in the support zone of the reinforced concrete beam.

Źródło:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 3; 101-110
2300-5130
2300-8903

Pojawia się w:

Czasopismo Inżynierii Lądowej, Środowiska i Architektury

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Egzystencjalno-religijny model przywództwa biznesowego. Perspektywa holistyczna

Autorzy:

Marek, Agnieszka
Kostrzewa, Sylwia

Powiązania:

https://bibliotekanauki.pl/articles/1371471.pdf

Data publikacji:

2020-06-30

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

leadership theory
modes of existence
business ethics

Opis:

The main aim of the paper is to show an existential religious model of business leadership. We want to defend the thesis that leaders, who consider existing norms and regulations, have the greatest influence on how organisational aims are achieved. Thus, based on the concept of Kierkegaard’s modes of existence, we show that the individual values and motives of leaders’ behaviour influence the shape of the leadership itself as well as the management of an organisation. On the basis of a literature review, we propose the following connections: an aesthetic mode with instrumental motives which result in the shareholder perspective; an ethical mode of existence with normative motives which lead to the stakeholder perspective; and the spiritual mode of existence with transcendental motives which enable leaders to introduce a holistic perspective of management. However, we cannot link certain motives with a particular type of leadership, as leaders with different modes of existence might practice the same type of leadership (i.e., leadership based on values, authentic leadership) and combine various types of leadership in their actions. The paper might provide a theoretical basis for empirical research on leadership and managerial behaviour.

Źródło:

Annales. Etyka w Życiu Gospodarczym; 2020, 23, 2; 39-54
1899-2226
2353-4869

Pojawia się w:

Annales. Etyka w Życiu Gospodarczym

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

La post-fantasy: il ciclo letterario Inquisitore Eymerich di Valerio Evangelisti come una realizzazione dell’elemento fantastico tramite la narrazione postmoderna
Post-Fantasy: The literary series of Inquisitore Eymerich by Valerio Evangelisti as an example of postmodern transposition of the fantastic element

Autorzy:

Przełucka, Patrycja

Powiązania:

https://bibliotekanauki.pl/articles/701127.pdf

Data publikacji:

2020

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

Italian fantasy
postmodern novel
intertextuality
transfictionality
narrative modes

Opis:

This article examines the literary series of Inquisitore Eymerich by Valerio Evangelisti, a variegated macronarrative, which, resisting generic classification, introduces innovation to the panorama of contemporary Italian fantasy. Departing from the analysis of the salient features of the series such as intertextuality, hybridization, storiographic metafiction, and transfictionality, the article examines closely the areas of postmodern narration and inquires into the role of the fantastic element in Italian literature. Evangelisti makes the most of postmodern narrative strategies and of fantasy’s ability to penetrate various media in order to provide a tool of critical reflection on human history with an emphasis on the phenomenology of power. By interweaving different literary genres and inviting readers to produce their own interpretations in form of fan fiction, Evangelisti creates a new type of committed narrative, post-fantasy, which presents a new conception of postmodern narrative, one that overcomes the barrier between the literary fiction and the genre fiction.

Źródło:

Romanica Silesiana; 2020, 17, 1; 69-80
1898-2433
2353-9887

Pojawia się w:

Romanica Silesiana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Weakly Bound States in Heterogeneous Waveguides: A Calculation to Fourth Order

Autorzy:

Amore, P.

Powiązania:

https://bibliotekanauki.pl/articles/1032586.pdf

Data publikacji:

2017-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

trapped modes
bound states
deformed waveguide
perturbation theory

Opis:

We have extended a previous calculation of the energy of a weakly heterogeneous waveguide to fourth order in the density perturbation, deriving its general expression. For particular configurations where the second and third orders both vanish, we discover that the fourth order contribution lowers in general the energy of the state, below the threshold of the continuum. In these cases the waveguide possesses a localized state. We have applied our general formula to a solvable model with vanishing second and third orders reproducing the exact expression for the fourth order.

Źródło:

Acta Physica Polonica A; 2017, 132, 4; 1351-1357
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Freud, Stern and McGilchrist: Developmental and Cultural Implications of Their Work

Autorzy:

Burston, Daniel

Powiązania:

https://bibliotekanauki.pl/articles/451441.pdf

Data publikacji:

2019-07-31

Wydawca:

Uniwersytet Warszawski. Wydział Filozofii

Tematy:

psychoanalysis
modes of knowing
hemispheric dominance
modernity
postmodernism

Opis:

“Human beings have two fundamentally different ways of thinking about and engaging with the world.” Some variant of this proposition is shared by many thinkers across time. This paper focuses on the core similarities and the subtle (but significant) differences between Freud’s theory of primary and secondary processes, Karl Stern’s theory of the scientific and poetic modes of knowledge and Iain McGilchrist’s account of the differences between left and right-hemispheric competences, values and ways of “being-in-the-world”. It asks whether (or to what extent) the collective tendency to privilege one “way of knowing” over another promotes or inhibits optimal human development and cultural change and transformation.

Źródło:

Eidos. A Journal for Philosophy of Culture; 2019, 3, 2(8); 109-123
2544-302X

Pojawia się w:

Eidos. A Journal for Philosophy of Culture

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

The Psychic Distance Concept: A Review of 25 Years of Research (1990–2015)

Autorzy:

Ciszewska-Mlinaric, Mariola
Trąpczyński, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/465614.pdf

Data publikacji:

2016

Wydawca:

Akademia Leona Koźmińskiego w Warszawie

Tematy:

psychic distance
entry strategy
performance
antecedents
coping modes

Opis:

Purpose: There have been numerous studies analyzing the role of psychic (and cultural) distance in the internationalization process focused on relationships between distance and market selection, entry mode, or subsidiary performance. Still, cumulative findings of this body of research are mixed and inconclusive. Thus, this review aims for a rigorous presentation of past research on psychic distance, with particular focus on the aspects of international business operations affected by psychic distance in the light of empirical studies.Methodology: This review encompasses 55 papers, both empirical and conceptual, published between 1990–2015 in top IB, international marketing, and management journals. In general, the papers under review were published in 27 journals, with the vast majority of them being published in 2005 or later. The vast majority of reviewed papers are of empirical character (47 papers), while eight are conceptual.Findings: Since 2005, the number of articles published in top academic journals that featured the term “psychic distance” in the title has quadrupled. Common research topics include not only the core domain of internationalization process and performance, but also focus on understanding the concept of psychic distance, analyzing its antecedents and coping modes. Other studies have addressed the performance implications of psychic distance in conjunction with variables like strategy adaptation to foreign markets.Research limitations/implications: While the present review is limited in the number of papers taken into account, it does provide an initial overview of the structure of the field. However, the comparability of findings of different studies is limited by factors such as firm samples or presence of multicultural nations. In terms of directions for further research, promising topics include the relationship between perceived and ‘real’ distances or the effectiveness of different coping modes.Originality/value: The present paper identifies key research streams related to psychic distance and its role for international business. Based on an analysis of their content, it outlines several avenues for further investigation.

Źródło:

Journal of Management and Business Administration. Central Europe; 2016, 2; 2-32
2450-7814

Pojawia się w:

Journal of Management and Business Administration. Central Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Experimental modal analysis in research

Autorzy:

Żółtowski, M.
Napieraj, K.

Powiązania:

https://bibliotekanauki.pl/articles/390979.pdf

Data publikacji:

2017

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

experimental modal analysis
FRF function
vibration modes
testing

Opis:

Experimental modal analysis has grown steadily in popularity since the advent of the digital FFT spectrum analyser in the 1970’s. This days impact testing has become widespread as a fast and economical means of finding the vibration modes of a machine or structure. Its significantly use ascending roles can be seen also in the civil engineering industry [6]. This paper reviews the main topics associated with experimental modal analysis including making FRF measurements, modal excitation techniques, and modal parameter estimation from a set of FRFs.

Źródło:

Budownictwo i Architektura; 2017, 16, 3; 5-12
1899-0665

Pojawia się w:

Budownictwo i Architektura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Influence of flight control law on spin dynamics of aerodynamically asymmetric aircraft

Autorzy:

Malik, B.
Akhtar, S.
Masood, J.

Powiązania:

https://bibliotekanauki.pl/articles/279175.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

aerodynamic model
steady spin modes
unsteady effects
simulations

Opis:

In this paper, we analyze the spin dynamics of an aerodynamically asymmetric aircraft in open-loop configuration and also evaluate the performance of gain scheduled flight control law in improving dynamic characteristics of aircraft spin. A look-up tables based aerodynamic model is developed from static, coning and oscillatory coning rotary balance wind tunnel test data. As a starting point, all possible steady spin modes are identified by solving the aircraft dynamic model comprising moment equations. The influence of high-alpha yawing moment asymmetry on predicted right and left spin modes is discussed. Six degree of freedom simulations of left and right flat spins are performed in open-loop and closed-loop configurations with the flight control law. Our studies reveal that large amplitude oscillations in the angle of attack and sideslip observed in the open-loop configuration are significantly damped by the control law. The control law reduces the recovery time of the left flat spin. However, the aircraft natural tendency to rotate rightwards due to yawing moment asymmetry at high angles of attack renders flight control law ineffective in aiding the recovery of the right flat spin.

Źródło:

Journal of Theoretical and Applied Mechanics; 2017, 55, 3; 963-975
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Overtone Modes in an At-Cut Quartz Trapped-Energy Resonator with Elliptical Electrodes

Autorzy:

Li, Long
Wang, Zhi

Powiązania:

https://bibliotekanauki.pl/articles/1033433.pdf

Data publikacji:

2017-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

quartz
resonator
thickness-shear vibration
elliptical
overtone modes

Opis:

We analyze thickness-shear vibrations of an at-cut quartz plate with elliptical electrodes. The electrodes are essentially optimal in the sense of Mindlin in that they approximately satisfy the criterion for the Bechmann number in every direction. The scalar differential equation derived by Tiersten and Smythe is used which allows us to obtain the overtone modes in addition to the fundamental modes.

Źródło:

Acta Physica Polonica A; 2017, 131, 2; 294-296
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Multi-pronged approach with synergisation of travel modes and institutional linkages – critical for sustenance of urban transportation

Autorzy:

Rao, P. Ganeswara
Kumar, A. Arun
Shekhar, V.

Powiązania:

https://bibliotekanauki.pl/articles/1076135.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Linkage
Multi Pronged Approach
Travel modes
Urban Transportation

Opis:

Urban areas and metros are growing at a much higher rate than the rural areas. Urban areas play a significant role in the development of the nation by contributing 60% of the national income with only 27.78% of the population. Urban Transport is the most crucial (infrastructure) element in shaping urban development and living. The supply of transport is heterogeneous with a number of interacting and competing modes while the demand for it is derived from the overall pattern of urban activity. Urban Transport has a significant impact on the environment, land use, and land development patterns. In India, multiple institutions are responsible for urban transport and it is governed by multiple policies/ Acts/ legislations. While bus is the major mode of urban transport, local/suburban trains (Railway), Taxies/Autos and personalized transport makeup the rest. Lack of proper public transport has resulted in the increase of personal vehicles, causing problems of congestion, pollution and loss of productive time on travel delays. Study of urban transport systems across the world has revealed that well coordinated institutions with dedicated funding sources and proper planning ensure well functioning urban public transport systems, keeping the cities liveable and productive. Urban transport has to be a public good and be funded through public resources. Indian context have revealed a good beginning made in this direction but absence of institutional arrangements for planning at local level, lack of coordination among various institutions and departments, lack of dedicated funding, lack of inter modal coordination, lack of patronage for new rail based systems are also glaring.

Źródło:

World Scientific News; 2019, 116; 46-61
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Predicting Self-Regulation through Inner Speech Reflexivity Modes

Autorzy:

Shahidi, Mehrdad
Brinhaupt, Thomas
Shojaee, Mhnaz

Powiązania:

https://bibliotekanauki.pl/articles/2081281.pdf

Data publikacji:

2021-06-24

Wydawca:

Akademia Pedagogiki Specjalnej. Language and Society Research Committee

Tematy:

Self-Consciousness
Self-Regulation
Inner Speech Reflexivity Modes

Opis:

Archer (2012) theorized that internal conversation [inner speech] has a mediating role between objective or macroscopic features of social configuration and subjective mental [cognitive] activities. This mediating role is represented by communicative, meta-reflexivity, autonomous, and fractured modes. The literature review reveals that self-regulation may have originated in inner speech. However, it is unclear how different modes of inner speech/conversation can explain and predict self-regulation. To examine this question, 150 students completed measures of self-regulation and inner speech. Students reported lower levels of the fractured mode of inner speech than other modes. Although the meta-reflexivity mode (MRM) had the largest effect size in predicting self-regulation, communicative mode, self-consciousness, and MRM together predicted 41% of variability of self-regulation. As well, there were no differences in female and male participants’ scores in inner speech reflexivity modes and self-regulation stages. The results suggest several implications to enhance students’ self-regulation within the social context of educational settings.

Źródło:

Language, Discourse & Society; 2021, 9 (1); 65-77
2239-4192

Pojawia się w:

Language, Discourse & Society

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Theory of evanescent Bessel beams with a metallic sheet

Autorzy:

Al-Awfi, S.

Powiązania:

https://bibliotekanauki.pl/articles/173463.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

optical vortex
optical lattice
metallic sheet
surface modes

Opis:

We explain how a surface optical vortex can be created when a Bessel beam is totally reflected internally at the planar surface of a dielectric on which a metallic sheet has been deposited. A two-dimensional patterning on the surface, the strongly localized intensity distribution decays with distance vertical to the surface. The characteristics of this surface optical vortex depend on the incident beam parameters and the dielectric mismatch of the media.

Źródło:

Optica Applicata; 2013, 43, 3; 539-550
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Review of Experimental Verification Methods of Gyrotron Quasi-optical Mode Converters

Autorzy:

Jaworski, Grzegorz
Francik, Andrzej
Nowak, Maciej
Nowak, Kacper

Powiązania:

https://bibliotekanauki.pl/articles/958091.pdf

Data publikacji:

2020

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

gyrotron
high order modes
measurement for quasi-optical systems

Opis:

This survey presents a review of experimental methods relied upon while implementing gyrotron higher mode generation techniques and performing near electromagnetic field measurements in launcher and quasi-optical mode converters. In particular, the paper focuses on low power (cold) testing of gyrotron quasi-optical mode converters outside of the gyrotron, without the presence of high electromagnetic power and electron beams.

Źródło:

Journal of Telecommunications and Information Technology; 2020, 3; 75-85
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Eigen modes of the double DNA chain helix vibrations
Postacie własne drgań podwójnego łańcucha helisy DNA

Autorzy:

Hedrih (Stevanovic), K. R.
Hedrih, A. N.

Powiązania:

https://bibliotekanauki.pl/articles/280080.pdf

Data publikacji:

2010

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

DNA
eigen main chains
eigen circular frequency
vibration modes

Opis:

Different models of two coupled homogeneous DNA chain vibrations are proposed in the literature. By using as the basic approach to the DNA mathematical modelling published by N. Kovaleva, L. Manevich in 2005 and 2007, we consider a linearized model to obtain main chain subsystems of the double DNA helix. Analytical expressions of the circular eigen frequencies for the homogeneous model of the double DNA chain helix are obtained. The corresponding vibration eigen modes and possibilities of the appearance of resonant regimes as well as dynamical absorption under external excitations are considered. Two sets of normal eigen coordinates of the double DNA chain helix for separation of the system into two uncoupled chains are identified. This may correspond to the base pair order in complementary chains of the DNA double helix in a living cell.
W literaturze można spotkać opis różnych modeli sprzężonych drgań jednorodnego łańcucha DNA. W prezentowanej pracy rozważania oparto na zlinearyzowanym modelu Kovalevej i Manevicha (2005, 2007) do wydzielenia głównych podukładów łańcuchowych podwójnej helisy DNA. Uzyskano analityczne wyrażenia na częstości własne jednorodnego modelu helisy i odpowiadające im postacie własne oraz potwierdzono możliwość wystąpienia rezonansów i dynamicznej absorpcji drgań przy obecności wymuszeń zewnętrznym polem sił. Zidentyfikowano dwa zbiory współrzędnych normalnych helisy DNA potrzebnych do separacji układu na dwa rozprzężone łańcuchy. Niewykluczone, że mogą one odpowiadać rzędowi podstawowych komplementarnych podwójnych łańcuchów DNA w żywej komórce.

Źródło:

Journal of Theoretical and Applied Mechanics; 2010, 48, 1; 219-231
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Progress in stellarator research at IPP-Kharkov

Autorzy:

Moiseenko, V. E.
Lozin, O. V.
Shapoval, A. M.
Dreval, M. B.
Kulyk, Y. S.
Mironov, Y. K.
Romanov, V. S.
Pashnev, V. K.
Sorokovoy, E. L.
Petrushenya, A. A.
Ozherel’ev, F. I.
Kozulya, M. M.
Konovalov, V. G.
Maznichenko, S. M.
Garkusha, I. E.

Powiązania:

https://bibliotekanauki.pl/articles/146173.pdf

Data publikacji:

2016

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

stellarator
radio-frequency heating
low frequency modes
magnetic diagnostics

Opis:

A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic Maxwell’s equations in radially non-uniform plasma cylinder. In recent experiments with this antenna, the SXR, CV, OV and OII emission measurements indicate that the light impurity radiation barrier is overcame at this device. Plasma with a temperature of ~50 eV exists during a short period of a few milliseconds. Then the radiation collapse comes owing to strong infl ux of impurities to the plasma column. A new magnetic diagnostics has been installed at Uragan-3M. Using it the poloidal magnetic fi eld is measured and the shift of toroidal current in major radius is registered. A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray (SXR) plasma emission has been recently installed on the U-3M. Different shapes of the SXR emission profi le has been observed in different discharge conditions.

Źródło:

Nukleonika; 2016, 61, 2; 91-97
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Teaching in a time of pandemic: The case of the EMET Program at Pennsylvania State University - Fayette

Autorzy:

Gapinski, Andrzej J.

Powiązania:

https://bibliotekanauki.pl/articles/35729360.pdf

Data publikacji:

2024

Wydawca:

Szkoła Główna Handlowa w Warszawie

Tematy:

educational system
teaching modes
online learning
pandemic
engineering program

Opis:

The author shares his experiences of university teaching during the time of restrictions imposed on teaching and learning modes due to a pandemic. The relative scarcity of literature analyzing the response in the fields of science and engineering to the pandemic served as motivation. After providing general background information about the pandemic’s impact on educational systems worldwide, the article provides qualitative research with a narrative model for a case study of an engineering program at an American university. The analyzed case concerns the teaching and learning methodologies implemented in an electro-mechanical engineering technology bachelor’s degree program at Pennsylvania State University – the Fayette campus in the academic years 2020-22. Pennsylvania State University’s chosen teaching modes in the time of the pandemic to be used by instructors provide an example of adaptability of a higher education institution to the changing teaching and learning circumstances. The pedagogical approach to preparing, delivering, and assessment of learning effectiveness in engineering courses with a laboratory component is described. The article also shows how to use the learning management system, Canvas, with its analytical utility tool, to improve effectiveness and responsiveness of the teaching and learning process. The shortcomings and unexpected benefits of learning online pedagogy are shared and discussed. To assess the students’ perception and the study mode and their preferences in this regard, an anonymous, closed-ended, nominal-polytomous questionnaire was conducted, and its findings are analyzed. Further, to compare the students’ preferences as regards study modes depending on the academic discipline, engineering students were contrasted with students studying business as their major. The surveys also provide answers to trends in the longer term in students’ expectations for delivery of programs by higher education institutions.

Źródło:

e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2024, 104, 2; 64-73
1731-6758
1731-7428

Pojawia się w:

e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Problematyka kategorii stron postępowania administracyjnego w kontekście przesłanki zgody strony na uchylenie lub zmianę decyzji ostatecznej na podstawie art. 155 Kodeksu postępowania administracyjnego
The issue of the category of parties in administrative proceedings in the context of the condition of consent of the party to have the final decision repealed or amended pursuant to article 155 of the Code of Administrative Procedure

Autorzy:

Kledzik, Przemysław

Powiązania:

https://bibliotekanauki.pl/articles/697255.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Opolski

Tematy:

party to proceedings
administrative proceedings
administrative procedure
extraordinary modes

Opis:

As far as the norms of the Code of Administrative Procedure (CAP) are concerned, there is no other category of entities other than a party to the proceedings who could request the authority’s action or whom the authority’s action might concern, as was the case in the regulation of the President of the Republic of Poland of 1928, preceding the CAP, regulating the institution of the person concerned. In the CAP regulation, in the scope of the category of parties to the proceedings, the legislator distinguished parties with disputed interests. The disputed interest is most often manifested in the fact that one of the parties requests the initiation of proceedings in order to obtain a specific entitlement, and the authority deciding in this regard must do so in such a way as not to infringe on the legal interest of other persons (third parties) who, due to the interest in question, in order to ensure its proper protection, use and enjoy the status of a party in the proceedings. For delimiting the above categories of the parties to proceedings, the doctrine and the case-law assume their division into parties with the so-called main rights and parties with the so-called reflexive rights. In the context of the underlined distinction of both sub-categories of parties to proceedings, the object of the analysis of this study is the question of whether or not, according to the provisions of the CAP, the differentiation of their procedural rights can be made. To this end, it was justified to refer to the institution of repealing or amending a final decision pursuant to Article 155 of the PAC, in view of the positions that are presented in the caselaw of the administrative courts in the context of this provision.

Źródło:

Opolskie Studia Administracyjno-Prawne; 2018, 16, 1 (1); 87-98
2658-1922

Pojawia się w:

Opolskie Studia Administracyjno-Prawne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Methods of modern aircraft aeroelastic analyses in the institute of aviation

Autorzy:

Chajec, W.

Powiązania:

https://bibliotekanauki.pl/articles/247210.pdf

Data publikacji:

2018

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

flutter
normal modes
ground vibration test
unsteady aerodynamic model

Opis:

The aeroelastic phenomena analysis methods used in the Institute of Aviation for aircraft, excluding helicopters, are presented in the article. In industrial practice, a typical approach to those analyses is a linear approach and flutter computation in the frequency domain based on normal modes, including rigid body modes and control system modes. They are determined by means of the finite element method (FEM) model of structure or a result of ground vibration test (GVT). In the GVT case, relatively great vibration amplitudes are applied for a good examination of a not truly linear structure. Instead or apart from the measure of generalized masses, a very theoretical model is used for mode shapes cross orthogonality inspection and improvement. The computed or measured normal mode sets are the basis for flutter analysis by means of several tools and methods, like MSC.Nastran and ZONA commercial software as well as our own low-cost software named JG2 for the flutter analysis of low speed aeroplanes and for a preliminary analyses of other aircraft. The differences between the methods lie in determining normal mode set, unsteady aerodynamic model, flutter equation formulation, time of analysis, costs, etc. Examples with results comparison obtained by means of distinguished methods are presented. Some works in the field of aeroelastic analysis with nonlinear unsteady aerodynamic in the time domain using Tau-code and ANSYS Fluent software were also performed. Aeroelastic properties of deformed structures, like a sailplane with deflected wings, can be also analysed. The simplest way of this analysis is the semi-linear approach in which the deflections modify the aircraft geometry for normal modes determination.

Źródło:

Journal of KONES; 2018, 25, 4; 33-42
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Natural convection in a partially heated cylinder: A numerical study

Autorzy:

Núñez, José
Beltrán, Alberto
Rivero, Michel

Powiązania:

https://bibliotekanauki.pl/articles/2055060.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

bifurcations
natural convection
partially heated cylinder
switching modes solutions

Opis:

This work presents a numerical study on a natural convective flow in a cylindrical container heated from below, cooled from above, and partially heated from the lateral wall. Mass, momentum and energy equations were solved with a developed hybrid Fourier-finite volume code and validated with the commercial software COMSOL Multiphysics for steady-state solutions. The primary solutions correspond to steady-states Cm with azimuthal wavenumbers m. The results show mode competition between different states leading to many flow solutions including steady axisymmetric, steady non-axisymmetric, time-dependent pulsating wave solutions, and other flow states with a variety of spatiotemporal symmetries.

Źródło:

Journal of Theoretical and Applied Mechanics; 2021, 59, 4; 623--636
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Modelling of Influence of Hypersonic Conditions on Gyroscopic Inertial Navigation Sensor Suspension

Autorzy:

Korobiichuk, I.
Karachun, V.
Mel'nick, V.
Kachniarz, M.

Powiązania:

https://bibliotekanauki.pl/articles/221303.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

hypersonic technologies
gimbals
oscillation modes
acoustic transparency
navigation system

Opis:

The upcoming hypersonic technologies pose a difficult task for air navigation systems. The article presents a designed model of elastic interaction of penetrating acoustic radiation with flat isotropic suspension elements of an inertial navigation sensor in the operational conditions of hypersonic flight. It has been shown that the acoustic transparency effect in the form of a spatial-frequency resonance becomes possible with simultaneous manifestation of the wave coincidence condition in the acoustic field and equality of the natural oscillation frequency of a finite-size plate and a forced oscillation frequency of an infinite plate. The effect can lead to additional measurement errors of the navigation system. Using the model, the worst and best case suspension oscillation frequencies can be determined, which will help during the design of a navigation system.

Źródło:

Metrology and Measurement Systems; 2017, 24, 2; 357-368
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Effect of Sampling Spacing on the Accuracy of Volume of a Medium-Size Gully

Autorzy:

Jun, Luo
Bin, Zhang
Du, Zhengpin
Zheng, Jilin
Liu, Hui
Qin, Fachao
Deng, Qinchun

Powiązania:

https://bibliotekanauki.pl/articles/123269.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

three modes
sampling spacing
gully volume
gully cross-section

Opis:

Accurate morphological parameters are key to understand the process and mechanism of gully erosion, but little information exists regarding the accuracy of gully volume influenced by sampling spacing. In order to assess the influence of sampling spacing on volume of medium gully under the condition of different shapes of gully cross-sections, as well as to provide information for proposed surveys, a MultiStation was utilized to obtain the point cloud of a Uand V-shaped gully. The coordinates were subsequently rarefied to a certain sampling spacing, and the gully volumes of three modes (Mode 1 only including rarefied terrain points; Mode 2 including detailed terrain and rarefied terrain points; Mode 3 including the rarefied detailed terrain points and terrain points with a given sampling spacing) were calculated in ArcGIS. The results showed that the error of gully volume increased non-monotonously with sampling spacing increased, and that the detail points had greater influence on the gully volume of a U-shaped than a V-shaped gully. As to Mode 1 and 2, the relative error (RE) of U-shaped gully volume increased faster with sampling spacing increasing, and presented high positive correlation. However, in the case of a V-shaped gully, a middle positive correlation for Mode 1 can be observed, and the RE was below 3% for Mode 2. For Mode 3, an increase in the sampling spacing of the terrain led to the larger RE, average RE, and variance of absolute error. If extremely high accuracy (2.5% of RE) is required, sampling spacing is less than 0.5 m; if high accuracy (5% of RE) is set, the sampling spacing of terrain points is below 0.8 m for a U-shaped gully, while the corresponding sampling spacing of terrain points and detail points are 2.0 m and 1.85 m, 3.0 m and 1.80 m, and 4.0 m and 0.75 m for a V-shaped gully. The shape of the gully’s cross-section, as well as the exact location of the shoulder line will affect the accuracy of the gully’s volume. This study will increase the efficiency of detail survey in the field for medium gully.

Źródło:

Journal of Ecological Engineering; 2019, 20, 11; 109-121
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

An approach to generalization of the intuitionistic fuzzy topsis method in the framework of evidence theory

Autorzy:

Dymova, Ludmila
Kaczmarek, Krzysztof
Sevastjanov, Pavel
Sułkowski, Łukasz
Przybyszewski, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/2031132.pdf

Data publikacji:

2021

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

TOPSIS
intuitionistic fuzzy sets
Dempster-Shafer theory
aggregating modes

Opis:

A generalization of technique for establishing order preference by similarity to the ideal solution (TOPSIS) in the intuitionistic fuzzy setting based on the redefinition of intuitionistic fuzzy sets theory (A−IFS) in the framework of Dempster-Shafer theory (DST) of evidence is proposed. The use of DST mathematical tools makes it possible to avoid a set of limitations and drawbacks revealed recently in the conventional Atanassov’s operational laws defined on intuitionistic fuzzy values, which may produce unacceptable results in the solution of multiple criteria decision-making problems. This boosts considerably the quality of aggregating operators used in the intuitionistic fuzzy TOPSIS method. It is pointed out that the conventional TOPSIS method may be naturally treated as a weighted sum of some modified local criteria. Because this aggregating approach does not always reflects well intentions of decision makers, two additional aggregating methods that cannot be defined in the framework of conventional A−IFS based on local criteria weights being intuitionistic fuzzy values, are introduced. Having in mind that different aggregating methods generally produce different alternative rankings to obtain the compromise ranking, the method for aggregating of aggregation modes has been applied. Some examples are used to illustrate the validity and features of the proposed approach.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2021, 11, 2; 157-175
2083-2567
2449-6499

Pojawia się w:

Journal of Artificial Intelligence and Soft Computing Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Complex of rat transthyretin with tetraiodothyroacetic acid refined at 2.1 and 1.8 Å resolution.

Autorzy:

Muzioł, Tadeusz
Cody, Vivian
Luft, Joseph
Pangborn, Walter
Wojtczak, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1044030.pdf

Data publikacji:

2001

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

rat transthyretin
tetraiodothyroacetic acid complex
multiple binding modes
crystal structure

Opis:

The crystal structure of rat transthyretin (rTTR) complex with 3,5,3' ,5' -tetraiodothyroacetic acid (T4Ac) was determined at 1.8 Å resolution with low temperature synchrotron data collected at CHESS. The structure was refined to R = 0.207 and Rfree= 0.24 with the use of 8-1.8 Å data. The additional 8000 reflections from the incomplete 2.1-1.8 data shell, included in the refinement, reduced the Rfree index by 1.3%. Structure comparison with the model refined against the complete 8-2.1 Å data revealed no differences in the ligand orientation and the conformation of the polypeptide chain in the core regions. However, the high-resolution data included in the refinement improved the model in the flexible regions poorly defined with the lower resolution data. Also additional sixteen water molecules were found in the difference map calculated with the extended data. The structure revealed both forward and reverse binding of tetraiodothyroacetic acid in one binding site and two modes of forward ligand binding in the second site, with the phenolic iodine atoms occupying different sets of the halogen binding pockets.

Źródło:

Acta Biochimica Polonica; 2001, 48, 4; 877-884
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Whispering gallery resonator method for permittivity measurements

Autorzy:

Derzakowski, K.
Abramowicz, A.
Krupka, J.

Powiązania:

https://bibliotekanauki.pl/articles/308148.pdf

Data publikacji:

2002

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

dielectric resonator
permittivity
loss tangent
measurement method
whispering gallery modes

Opis:

The new method of measuring permittivity is described. The measurements are performed using whispering gallery mode open dielectric resonators. The accuracy is assured by applications of the mode matching method. Three resonant modes (HE511, HE611 and HE711) are used in measurement procedure. Accuracy of the method is much better than 0.3% for the relative permittivity having values from 20 to 50.

Źródło:

Journal of Telecommunications and Information Technology; 2002, 1; 43-47
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Effect of Cross-Sectional Area Discontinuities in Closed Hard-Walled Ducts on Frequency of Longitudinal Modes

Autorzy:

Meissner, M.

Powiązania:

https://bibliotekanauki.pl/articles/177934.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

longitudinal duct modes
discontinuity in duct cross-section
contraction ratio

Opis:

A simple analytical method is developed to estimate frequencies of longitudinal modes in closed hard-walled ducts with discontinuities in a cross-sectional area. The approach adopted is based on a general expression for the acoustic impedance for a plane wave motion in a duct and conditions of impedance continuity at duct discontinuities. Formulae for mode frequencies in a form of transcendental equations were found for one, two and three discontinuities in a duct cross-section. An accuracy of the method was checked by a comparison of analytic predictions with calculation data obtained by use of numerical implementation based on the forced oscillator method with a finite difference algorithm.

Źródło:

Archives of Acoustics; 2010, 35, 3; 421-435
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Damage detection in beams using wavelet transform on higher vibration modes
Wykrywanie uszkodzeń w konstrukcjach belkowych za pomocą transformaty falkowej na bazie wyższych postaci drgań

Autorzy:

Rucka, M.

Powiązania:

https://bibliotekanauki.pl/articles/281047.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

damage detection
wavelet transform
higher vibration modes
scanning laser vibrometer

Opis:

Technical difficulties prevented so far wider applications of higher mode shapes in damage detection. Yet these modes carry on a lot of, so much needed, information on damage inflicted to a structure. However, recent scanning laser-based vibration measurement techniques allow one to utilize these higher modes in damage detection effectively. This paper deals with the wavelet-based damage detection technique on a cantilever beam with damage in the form of a single notch of depth 20%, 10% and 5% of the beam height. The purpose of the study is to present the results of experimental and numerical analyses of damage detection based on higher order modes. The first eight modes are considered and the influence of the mode order on the effectiveness of damage detection by the continuous wavelet transform is analysed in detail.
Niniejsza praca poświęcona jest technice diagnostyki konstrukcji bazującej na transformacie falkowej. Badany obiekt to belka wspornikowa z uszkodzeniami w firmie nacięcia o głębokości 20%, 10% oraz 5% wysokości belki. Pomiary postaci drgań wykonano za pomocą nowoczesnego wibrometru laserowego. Celem pracy jest przed- stawienie eksperymentalnych i numerycznych analiz wpływu wyższych postaci drgań na efektywność wykrywania uszkodzeń metodą ciągłej transformaty falkowej.

Źródło:

Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 399-417
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Analysis of operating states of haul trucks used in surface mining

Autorzy:

Bodziony, P.
Patyk, M.
Kasztelewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/949490.pdf

Data publikacji:

2018

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

surface mining
haul truck
fault modes
effect analysis
operating states

Opis:

Mining transport system based on the use of haul trucks should result from thorough analysis of technical and operating issues – which can have a crucial impact on the cost of minerals extraction. This selection should consider hitherto disregarded criteria, such as technical infallibility, operating parameters like mean operating time between failures (MTBF), mean failure intensity and fault modes and effect analysis etc. Considering the above issues, the following article is an attempt to analyse operating parameters of transport fleet of haul trucks for mineral resource in surface mining. Diagram of the typology of technical and operational haul truck states; source: own study; mean failure intensity graph and mean failure intensity graph for the total observation time; relationships between mean expected time between consecutive failures of specific object and (MTBF) mean value of the time, in which specific equipment is in the down time due to a failure are presented in the article. The MTBF index is a basic parameter helpful to determine dependability and can be used for logistic planning, in particular in the field of spare parts. This index allows determining the cost of object use throughout its entire life cycle.

Źródło:

Journal of KONES; 2018, 25, 2; 53-58
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Transport in Poland during the period of accession to the European Union

Autorzy:

Połom, Marcin
Goliszek, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/1201867.pdf

Data publikacji:

2017-08-30

Wydawca:

Uniwersytet Gdański. Instytut Geografii

Tematy:

transport
Polska
European Union
transformation period
changes of transport modes

Opis:

Transportation is an important area of the economy. The transport fills a series of tasks daily functioning of the state. The period of the accession of Central and Eastern Europe countries to the European Union, including Poland is the time of intensive investments financed by structural funds. The countries of the region have gained significant resources to improve the infrastructure and operation of most types of transport modes. This article is a review and ordering information on the functioning and development of major modes of transport. It retains the traditional distinction between road, rail, inland waterways and air transport. Quoted statistics for the period 2005-2015 in order to compare changes in transport infrastructure development.  

Źródło:

Journal of Geography, Politics and Society; 2017, 7, 3; 41-49
2084-0497
2451-2249

Pojawia się w:

Journal of Geography, Politics and Society

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Particle filtering for the estimation of system mode of operation

Autorzy:

Cadini, F.
Avram, D.
Zio, E.

Powiązania:

https://bibliotekanauki.pl/articles/2069691.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

particle filtering
Monte Carlo
hybrid system
discrete modes of operation

Opis:

Efficient diagnosis and prognosis of system faults depend on the ability to estimate the system state on the basis of noisy measurements of the system dynamic variables and parameters. The system dynamics is typically characterized by transitions among discrete modes of operation, each one giving rise to a specific continuous dynamics of evolution. The estimation of the state of these hybrid dynamic systems is a particularly challenging task because it requires keeping track of the transitions among the multiple modes of system dynamics corresponding to the different modes of operation. In this paper a Monte Carlo estimation method is illustrated with an application to a case study of literature which consists of a tank filled with liquid, whose level is autonomously maintained between two thresholds. The system behavior is controlled by discrete mode actuators, whose states are estimated by a Monte Carlo-based particle filter on the basis of noisy level and temperature measurements.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 1; 77--86
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Effects of Stewing Modes on Physicochemical Quality and Formation of Flavour Compounds of Chinese Dagu Chicken Soup

Autorzy:

Guan, Haining
Xu, Xiaojun
Feng, Chunmei
Tian, Yanli
Liu, Dengyong
Diao, Xiaoqin

Powiązania:

https://bibliotekanauki.pl/articles/28408447.pdf

Data publikacji:

2024-02-08

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

chicken soup
stewing modes
physicochemical quality
taste components
volatile compounds

Opis:

This study aimed to evaluate the influences of stewing modes, including high fire short time (HFST, 100°C/1 h), medium-high fire mid-length time (MFMT, 98°C/2 h), medium fire long time (MFLT, 90°C/3 h), and low fire ultra-length time (LFUT, 83°C/4 h) processing, on physicochemical parameters and flavour compound profile of Chinese Dagu chicken soup. The chicken soup prepared under the stewing mode of MFMT had smaller particle size (d_3,2 of 2.56 μm and d_4,3 of 1.73 μm), higher zeta potential (8.66 mV), and viscosity than the soups stewed under the other conditions. The umami-taste compounds, such as inosine 5'-monophosphate, and umami free amino acid were the most abundant in the soup stewed by MFMT (53.47 and 59.91 mg/100 mL, respectively). GC-MS results showed that the volatile compounds were mainly hexanal, octanal, heptanal, (E,E)-2,4-decadienal, nonanal, and 1-octen-3-ol. Additionally, the results of measurements made with the electronic nose and electronic tongue indicated that the overall flavour of the four chicken soups varied significantly. In general, considering the stability and umami taste of chicken soup, as well as the time-saving need, it is recommended to use the MFMT mode to prepare the chicken soup.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2024, 74, 1; 26-40
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Function of Motive Situation in Procedure of Leadership of Train Equipped with System ERTMS

Autorzy:

Gradowski, Paweł
Białoń, Andrzej
Gryglas, Marta

Powiązania:

https://bibliotekanauki.pl/articles/504373.pdf

Data publikacji:

2014

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

ERTMS/ETCS
system levels
work modes of traction vehicles operation scenario

Opis:

The Railway Infrastructure Manager in Poland initiated the implementation of the ERTMS system. This paper presents the description of level system, modes of work traction vehicles, basic parameters of system and also the exemplary principles of the system operations. These parameters are the elements used by operating scenarios which describe the behaviour in traffic situations on railway lines included in the development of the ERTMS system.

Źródło:

Logistics and Transport; 2014, 23, 3; 55-62
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Application Of Mcda Methods and Stochastic Dominance Rules in the Entry Mode Selection Process in International Expansion

Autorzy:

Górecka, Dorota
Szałucka, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/578534.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Ekonomiczny w Katowicach

Tematy:

Wybór trybu wejścia
Tryb nieudziałowy
Tryb udziałowy
Metoda MCDA
Entry mode selection
Non-equity modes
Equity modes
MCDA methods
EXPROM II with veto thresholds and SD rules.

Opis:

When a company decides to enter overseas markets, it must take a number of strategic decisions, such as, for instance, a decision on the appropriate entry mode. The company has a wide array of choices: various forms of exporting, contractual modes such as licensing, franchising and management contracts, turnkey projects and subcontracting or equity-based modes including wholly-owned subsidiary or joint venture. The various entry modes differ greatly in resource commitment, degree of risk, level of control or profit potential. The appropriate choice of entry mode is a key element of the success of foreign operations and the future of the company. Hence, it is essential for the company to conduct a deliberate and conscious analysis of advantages and disadvantages of each entry mode from the point of view of internal and external factors that influence the choice of entry mode, taking into account the opinion of different participants of the decision- making process. The aim of this paper is to carry out the simulation of the entry mode selection, using MCDA methods and stochastic dominance (SD) rules, from the perspective of a dynamically developing company that manufactures and distributes hygiene, cosmetic and medical products for women, children and adults.

Źródło:

Multiple Criteria Decision Making; 2014, 9; 5-31
2084-1531

Pojawia się w:

Multiple Criteria Decision Making

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Genetic algorithms-aided reliability analysis

Autorzy:

Harnpornchai, N.

Powiązania:

https://bibliotekanauki.pl/articles/2069699.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności

Tematy:

genetic algorithms
reliability analysis
simulation methods
complex systems
multiple failure modes

Opis:

A hybrid procedure of Genetic Algorithms (GAs) and reliability analysis is described, discussed, and summarized. The procedure is specifically referred to as a Genetic Algorithms-aided (GAs-aided) reliability analysis. Two classes of GAs, namely simple GAs and multimodal GAs, are introduced to solve a number of important problems in reliability analysis. The problems cover the determination of Point of Maximum Likelihood in failure domain (PML), the computation of failure probability using the GAs-determined PML, and the determination of multiple design points. The MCS-based method using the GAs-determined PML is specifically implemented in the so-called an Importance Sampling around PML (ISPML). The application of GAs to each respective problem is then demonstrated via numerical examples in order to clarify the procedures. With an aid from GAs, reliability analysis is possible even if there is no information about the geometry or landscape of limit state surfaces and the total number of crucial likelihood points. In addition, GAs significantly improve the computational efficiency and realize the analysis of rare events under constrained computational resources. The implementation of GAs to reliability analysis for building up the hybrid procedure is readily because of their algorithmic simplicity.

Źródło:

Journal of Polish Safety and Reliability Association; 2009, 1; 145--156
2084-5316

Pojawia się w:

Journal of Polish Safety and Reliability Association

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Estimation of strength properties of functionally graded structures with elliptical stress concentrators

Autorzy:

Stotsko, Z.A.
Kuzin, B.
Kuzin, M.O.
Mechanik, V.A.

Powiązania:

https://bibliotekanauki.pl/articles/2201119.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

elliptical stress concentrators
optimization of hardening modes
power load
computational mechanics

Opis:

Purpose: The purpose of this paper is to elaborate new calculation schemes for evaluating the strength parameters of railway rolling stock parts with non-local properties of surface layers in the presence of elliptical stress concentrators. Design/methodology/approach: Using the proposed approaches of developed mathematical modelling and open software for calculating FEniCS, it were established the most dangerous angles of stress concentrator orientation and the required thickness of the hardened zones of parts, which ensures their minimum softening during operation. Findings: It is shown that for an elliptical stress concentrator with any orientation angle, there is a certain key size of surface hardening thickness, the exceeding the value of which does not have influence on the operational strength of the parts, but rise the price of technological operations. Research limitations/implications: In this paper proposes a method for computation the impact of the orientation of the surface elliptical stress concentrators on the contact strength of parts under conditions of dominate friction power loads. Practical implications: The obtained results were used to set the modes of plasma hardening, which increase the contact strength of railway parts with elliptical stress concentrators. Originality/value: Using the approaches of contact mechanics, mathematical and computer modelling, methods of controlling the contact strength of the parts with the surface elliptical stress concentrators were proposed for the first time.

Źródło:

Archives of Materials Science and Engineering; 2022, 113, 1; 35--41
1897-2764

Pojawia się w:

Archives of Materials Science and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Investigation into a Potential Reduction of FMEA Efforts Using Action Priority

Autorzy:

Barsalou, Matthew

Powiązania:

https://bibliotekanauki.pl/articles/2201159.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

FMEA
failure modes and effects analysis
risk analysis
failure prevention
quality

Opis:

FMEAs have been prioritized using RPN; however, a new standard has introduced AP for prioritization. This study seeks to determine if the number of required improvement actions increases, decreases, or stays the same when using AP in place of RPN. Statistical software was used to simulate 10,000 combinations of severity, occurrence, and detection. Both AP and RPN were calculated for the 10,000 combinations. Statistical hypothesis testing was performed to determine if there was a difference between RPNs when sorted by AP and to determine if there was a difference in actions required using RPN or AP. There is a statistically significant difference between RPNs when sorted by high, medium, and low AP. Using an RPN threshold equal to or greater than 100 would result in no change in the number of actions required if prioritizing by high and medium, but would result in fewer actions required if only high is used.

Źródło:

Management and Production Engineering Review; 2022, 13, 4; 59--71
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Service behaviour of the self-stressed members reinforced with FRP bars

Autorzy:

Semianiuk, Volha
Semianiuk, Siarhei
Tur, Victar

Powiązania:

https://bibliotekanauki.pl/articles/111178.pdf

Data publikacji:

2020

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

expansive concrete
FRP bars
self-stress
behavior under loading
failure modes

Opis:

Fiber reinforced polymer (FRP) bars, as a structural reinforcement, are characterized by the number of advantages, such as: high strength-to-density ratio; absence of corrosion; resistance to the negative influence of the different aggressive mediums. Nevertheless, a wide practical application of such a bars finds an embarrassment because of the law modulus of elasticity (it varies from 30 GPa to 60 GPa), that leads to the development of the excessive crack opening as well as deflections under the loading. To enhance structural performance of the FRP reinforced concrete members, pretensioning of FRP bars can be considered as a good option. Opposite to the concrete members mechanical pretensioning, physico-chemical method of bars pretensioning based on the self-stressing concrete utilizing is considered. Influence of the controlled initial stress-strain state obtained during early age concrete expansion on the mechanical resistance of the self-stressed concrete members reinforced with both steel and FRP bars was studied.

Źródło:

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2020, 2; 1-10
2450-1859
2450-8721

Pojawia się w:

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Equivalent definitions for the measurability of a multivariate function and Filippovs lemma

Autorzy:

Idzik, Adam

Powiązania:

https://bibliotekanauki.pl/articles/748427.pdf

Data publikacji:

1979

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Measurable and nonmeasurable functions, sequences of measurable functions, modes of convergence

Opis:

W wielu pracach, w których pojawia się pojęcie mierzalności funkcji wielowartościowej, autorzy zazwyczaj formułują jedną definicję mierzalności i nie podkreślają związków z innymi definicjami, chociaż istnieje ich wiele. Zakładając, że przestrzeń, w której leżą wartości funkcji wielowartościowej, przyjmującej tylko zbiory domknięte, jest metryczna i zwarta, udowodnimy, że wszystkie bardziej znane definicje mierzaluości funkcji wielowartościowej są równoważne.
From the text: "In the many papers in which the concept of measurability of a multivariate function arises, the authors usually formulate one definition of measurability and ignore its connections with other definitions. Assuming that the space, in which the values of the multivariate function lie, which admits only a closed set, is metric and compact we prove that all well-known definitions of measurability of multivariate functions are equivalent. "A. F. Filippov's lemma was first formulated in 1959 [Vestnik Moskov. Univ. Ser. Mat. Meh. Astr. Fiz. Him. 1959, no. 2, 25–32; MR0122650] and was later generalized by many others, in particular by W. Furakawa [Ann. Math. Statist. 43 (1972), 1612–1622; MR0371418], C. J. Himmelberg [Fund. Math. 87 (1975), 53–72; MR0367142] and C. Olech [Bull. Acad. Polon Sci. Sér. Sci. Math. Astronom. Phys. 13 (1965), 317–321; MR0199338]. Using various definitions of measurability of a multivariate function (whose equivalence we prove beforehand) we introduce two theorems on the existence of a measurable implicit function. These theorems generalize Furakawa's theorem [op. cit.] which is a reformulation of Olech's theorem [op. cit.] for Borel measurability.''

Źródło:

Mathematica Applicanda; 1979, 7, 14
1730-2668
2299-4009

Pojawia się w:

Mathematica Applicanda

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Real-time implementation of an interconnected observer design for p-cells chopper

Autorzy:

Laidi, K.
Benmansour, K.
Ferdjouni, A.
Bouchhida, O.

Powiązania:

https://bibliotekanauki.pl/articles/141378.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

obserwator
switching modes
zasilanie
p-cell chopper
observer design
interconnected observer

Opis:

This paper deals with an observer design for a p-cell chopper. The goal is to reduce drastically the number of sensors in such system by using an observer in order to estimate all the capacitor voltages. Furthermore, considering an instantaneous model of a p-cell chopper, an interconnected observer is designed in order to estimate the capacitor voltages. This is realized by using only the load current measurement. Simulation results are given in order to illustrate the performance of such observer. To demonstrate the validity of our approach, experimental results based on Digital Signal Processor (DSP) are presented.

Źródło:

Archives of Electrical Engineering; 2010, 59, 1-2; 5-20
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Investigation of crack resistance in epoxy/boron nitride nanotube nanocomposites based on multi-scale methodInvestigation of crack resistance in epoxy/boron nitride nanotube nanocomposites based on multi-scale method

Autorzy:

Hemmatian, Hossein
Zamani, Mohammad Reza
Jam, Jafar Eskandari

Powiązania:

https://bibliotekanauki.pl/articles/280181.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

boron nitride nanotube
epoxy
fracture modes
finite element model
multi-scale method

Opis:

Boron nitride nanotubes (BNNTs) possess superior mechanical, thermal and electrical properties and are also suitable for biocomposites. These properties make them a favorable reinforcement for nanocomposites. Since experimental studies on nanocomposites are timeconsuming, costly, and require accurate implementation, finite element analysis is used for nanocomposite modeling. In this work, a representative volume element (RVE) of epoxy/BNNT nanocomposites based on multi-scale modeling is considered. The bonds of BNNT are modeled by 3D beam elements. Also non-linear spring elements are employed to simulate the van der Waals bonds between the nanotube and matrix based on the Lennard- -Jones potential. Young’s and shear modulus of BNNTs are in ranges of 1.039-1.041 TPa and 0.44-0.52 TPa, respectively. Three fracture modes (opening, shearing, and tearing) have been simulated and stress intensity factors have been determined for a pure matrix and nanocomposite by J integral. Numerical results indicate that by incorporation of BNNT in the epoxy matrix, stress intensity factors of three modes decrease. Also, by increasing the chirality of BNNT, crack resistance of shearing and tearing modes are enhanced, and stress intensity factor of opening mode reduced. BNNTs bridge the crack surface and prevent crack propagation.

Źródło:

Journal of Theoretical and Applied Mechanics; 2019, 57, 1; 207-219
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

A dual-stator brushless doubly-fed generator for wind power application

Autorzy:

Liu, Hao
Song, Yakai
Bai, Chunlan
He, Guofeng
Yin, Xiaoju

Powiązania:

https://bibliotekanauki.pl/articles/27309959.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

doubly-fed machine
dual-stator
electromagnetic analysis
operational characteristics modes
wind power generation

Opis:

A novelty dual-stator brushless doubly-fed generator (DSBDFG) with magnetic-barrier rotor structure is put forward for application in wind power. Compared with a doubly-fed induction generator, the DSBDFG has virtues of high reliability and low maintenance costs because of elimination of brush and sliprings components. Therefore, the proposed structure has tremendous potential as a wind power generator to apply in wind power. According to the operating principle of electric machine, the DSBDFG is studied in wind power application. At first, the topology, the winding connecting, the rotor structure, the power flow chart of different operating models and the variable speed capability of electric machine are discussed and analyzed. Then, a 50 kW DSBDFG is designed. Based on the principal dimension of the design electric machine, the electromagnetic characteristics of the DSBDFG with different running modes are analyzed and calculated to adopt the numerical method. From the result, it meets the requests of electromagnetic consistency and winding connecting in the design electric machine. Meanwhile, it confirms the proposed DSBDFG has the strong ability of speed regulation.

Źródło:

Archives of Electrical Engineering; 2023, 72, 4; 1073--1087
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Performance assessment of selected OMA techniques for dynamic identification of geotechnical systems and closely spaced structural modes
Ocena sprawności wybranych typów operacyjnej analizy modalnej do identyfikacji bliskich postaci drgań w konstrukcjach geotechnicznych

Autorzy:

Rainieri, C.
Fabbrocino, G.

Powiązania:

https://bibliotekanauki.pl/articles/279291.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

operational modal analysis
Second Order Blind Identification
close modes
retaining wall
geotechnical structures

Opis:

Output-only modal analysis techniques and dynamic monitoring for vibration-based structural health assessment are primary tools for the investigation of the dynamic behavior even of very complex systems. An increasing attention towards these techniques and the opportunities they offer is rising also in the civil engineering field. In the present paper, the attention is focused on the possibility to enhance the knowledge about specific civil engineering systems using traditional and innovative operational modal analysis (OMA) methods. Two case studies are presented: one is focused on the assessment of the performance of the Second Order Blind Identification for output-only modal analysis in the presence of closely spaced modes. In the other, OMA is applied to the simulated dynamic response of an embedded retaining wall. Encouraging results are obtained, pointing out that OMA can be confidently applied also to the analysis of wall vibrations induced by propagating waves.
Analiza modalna typu „output-only” i dynamiczne monitorowanie stanu konstrukcji na podstawie obserwacji drgań stanowią podstawowe narzędzia do badania dynamiki nawet bardzo złożonych układów. Wzrastające zainteresowanie takimi technikami i możliwościami, jakie oferują, odnotowuje się również w dziedzinie inżynierii lądowej. W prezentowanej pracy uwagę skupiono na możliwości pozyskiwania lepszej informacji o specyficznych układach konstrukcyjnych, poprzez zastosowanie tradycyjnych oraz innowacyjnych metod operacyjnej analizy modalnej (OMA). Przedstawiono dwa przypadki. W pierwszym skoncentrowano się na ocenie efektywności ślepej identyfikacji drugiego rzędu dla przypadku analizy modalnej typu „output-only” układu z bliskimi postaciami drgań własnych. W drugim technikę OMA zastosowano do zasymulowanej dopowiedzi dynamicznej ściany oporowej. Otrzymano zachęcające rezultaty, które wskazały analizę OMA jako godną zaufania przy badaniu drgań ściany wywołanych propagacją fal.

Źródło:

Journal of Theoretical and Applied Mechanics; 2011, 49, 3; 825-839
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Specifics of self-commercialization of innovative products by machine-building companies

Autorzy:

Kuzmin, O.
Kostsyk, R.

Powiązania:

https://bibliotekanauki.pl/articles/411301.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

commercialization
innovative products
modes and methods of commercialization
self-commercialization
machine building companies

Opis:

Scientific literature considering modes and methods of enterprises innovative products commercialization was analyzed in the article. Also authors’ opinions about commercialization of innovative products by manufacturing companies through using the products for own needs were described. Based on the information from the studied literature and statistical data was concluded that the most appropriate and most popular method of commercializing innovative products by machine-building companies is using the products for the needs of the company (for internal needs or for product sales). However, this method has significant advantages as well as partial disadvantages expressed in certain risks occurring during commercialization process implementation. To provide clearer understanding of these issues the article describes the special features of the aforementioned method in accordance with business objectives and conditions of use in the enterprise.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 1; 61-66
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Metoda pomiaru modowej dyspersji chromatycznej w światłowodach planarnych
The method of the modal chromatic dispersion measurement in planar waveguides

Autorzy:

Rogoziński, R.

Powiązania:

https://bibliotekanauki.pl/articles/153623.pdf

Data publikacji:

2007

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

światłowody planarne
efektywne współczynniki załamania modów
planar waveguides
effective refractive indexes of modes

Opis:

W pracy zaproponowana została metoda pomiarów właściwości dyspersyjnych efektywnych współczynników załamania modów światłowodów planarnych w zakresie widzialnym widma. Wykorzystuje ona monochromator, sprzęgacz pryzmatyczny i kamerę CCD. W pomiarach rejestruje się obrazy widm modowych dla różnych długości fal zadawanych za pomocą monochromatora. Znajomość dyspersji chromatycznej sprzęgacza pryzmatycznego pozwala na wyznaczanie zależności dyspersyjnych efektywnych współczynników załamania modów falowodowych.
The method of the measurement modal chromatic dispersion in planar waveguides in the visible range of the spectrum has been proposed in the work. This method make use of monochromator, prism coupler and CCD camera. In the measurements, the visible image of modal spectrum has been logged for the various lengths of waves from monochromator. The knowledge of the prism coupler chromatic dispersion makes possible to calculate modal dispersion properties of waveguides.

Źródło:

Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 273-276
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

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