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Tytuł:
Parmenide e l’Uovo argenteo degli Orfici in Simplicio, Damascio e Proclo
Autorzy:
Licciardi, Ivan Adriano
Powiązania:
https://bibliotekanauki.pl/articles/28408733.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Egg
Orphism
Parmenides
Proclus
Damascius
Simplicius
Opis:
When commenting on Aristotle Ph. 1.3, 187a1, Simplicius in Ph. 1.3, 146, 29–147,2 establishes an equivalence between the shining «silver egg» (ὤεον ἀργύφεον) of Orpheus (fr. 70 Kern) and the Parmenidean being or, rather, one of the determinations with which Parmenides, in the section of his Poem devoted to the so-called Way of Truth, indicates the ἐόν, i.e., «resembling the mass of a well-rounded sphere» (εὐκύκλου σφαίρης ἐναλίγκιον ὄγκωι – DK 28 B 8.43). The equivalence established here is found in the great digression about Parmenides (in Ph. 142, 28–148, 24), where Simplicius puts forward an interpretation of Parmenides that identifies the Parmenidean being-one (τὸ ἓν ὄν) with the intelligible (τὸ νοητόν), which, in another passages of the same commentary, is also qualified with the metaphysical concept of “unified” (τὸ ἡνωμένον) that is taken from Damascius. The aim of the present paper is to trace back the Neo-Platonic assumptions of this identification. In particular, we will focus on Damascius Pr. 2.55.40, 14–19 and 3.123.160, 1–3 Westerink, since these passages contain insights into the Orphic theology that is referred to as “usual”, “common” or “rhapsodic”, as well as a contextual “translation” of various Orphic concepts (e.g. ὤεον ἀργύφεον) in terms of Neo-Platonic metaphysics. The metaphysical transposition of the mythical image of the silver egg goes back, however, to Proclus (in Ti. 1.428, 8–9), who assumes the identity between Plato’s being (“being in the primary sense”, τὸ πρώτως [...] ὄν) and the Orphic egg (ταὐτὸν τό τε Πλάτωνος ὂν καὶ τὸ Ὀρφικὸν ὠόν). One cannot, at the same time, exclude a priori the possibility that the Orphic motif of the silver egg circulated in the Magna Graecia of Parmenides already from at least the 6th century BC. It is possible, as Colli hypothesised, that already Ibycus (who certainly knew Orpheus, fr. 25 Page) betrays a certain knowledge of it in fr. 4.4–5 Page, where we find the expression ἐν ὠέωι ἀργυρέωι. This article demonstrates that Proclus and Damascius embedded the Orphic concept of ὤεον ἀργύφεον into their Neo-Platonic metaphysics by showing its potential for speculative order.
Źródło:
Peitho. Examina Antiqua; 2023, 14, 1; 99-124
2082-7539
Pojawia się w:
Peitho. Examina Antiqua
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On Not Taking the World for Granted: E. L. Mascall on The Five Ways
Autorzy:
Haggerty, William
Powiązania:
https://bibliotekanauki.pl/articles/507705.pdf
Data publikacji:
2019-06-30
Wydawca:
International Étienne Gilson Society
Tematy:
The Five Ways
Mascall
Aquinas
neo-Thomism
contuition
natural theology
Locke
British empiricism
scholasticism
theistic proofs
ontologism
ratio
intellectus
Opis:
Considered one of the leading proponents of natural theology in the 20th century, E. L. Mascall (1905–1993) taught philosophy and theology at King’s College London for most of his career. Unlike many of his contemporaries, he insisted that classical theism, embodied in the writings of Augustine and Thomas Aquinas, could be successfully revived for a modern audience. Known for his vigorous defense of neo-Thomism, Mascall offered an unusual interpretation of The Five Ways. While modern scholastics typically read the proofs as syllogistic exercises, Mascall maintained that God’s existence could not be deduced from premises, but must be grasped by means of a unique type of “metaphysical intuition” which he called “contuition.” In my paper, I will re-examine his position, explore his reasons for adopting it, and finally raise several questions concerning its significance for the history of neo-Thomism.
Źródło:
Studia Gilsoniana; 2019, 8, 2; 277-303
2300-0066
Pojawia się w:
Studia Gilsoniana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Legge sulla cittadinanza, la residenza e l’accesso N. CXXXI – the legislative reorganisation of the citizenship of the Vatican City State
Legge sulla cittadinanza, la residenza e l’accesso N. CXXXI – reorganizacja legislacyjna obywatelstwa miasta-państwa Watykan
Autorzy:
Witola, Filip
Powiązania:
https://bibliotekanauki.pl/articles/38419830.pdf
Data publikacji:
2024-07-17
Wydawca:
Uniwersytet Opolski
Tematy:
Vatican citizenship
Vatican City State
The Holly See
obywatelstwo watykańskie
miasto-państwo Watykan
Stolica Apostolska
Opis:
The citizenship of the Vatican City State is characterised by individual features relating above all to the manner in which it is conferred and its forfeiture. The introduction of the legal category of Vatican nationality has its origins in the Lateran Treaty, but it was in 1929 when Pope Pius XI promulgated the law Legge sulla cittadinanza ed il soggiorno N. III concretising this institution which has lived to see its own reorganisation over time. Based on an analysis of Vatican legislation, it is possible to conclude that the present Vatican legislation is largely updated to current needs without losing its unique characteristics. The main intention was to present whether and how Legge sulla cittadinanza, la residenzae l’accesso N.CXXXI changes Vatican citizenship and what differences can be found in the newly created law. This process was based on a comparative method of legal acts, an analysis of the literature, as well as observation of interrelationships and dependencies. On the basis of this exercise, it was determined that the 2011 law remains within the original legal framework, but that its amendment is of a practical nature, intended to give individuals freedom of action and not to lead them to the appearance of possible negative consequences associated with the loss of citizenship.
Obywatelstwo miasta-państwa Watykan charakteryzuje się indywidualnymi cechami odnoszącymi się przede wszystkim do sposobu nadawania i jego utraty. Wprowadzenie kategorii prawnej obywatelstwa watykańskiego swój początek bierze w traktacie laterańskim, jednakże papież Pius XI w 1929 r. promulgował ustawę Legge sulla cittadinanza ed il soggiorno N. III, konkretyzującą tę instytucję, która z biegiem czasu doczekała się swojego przeorganizowania. Na podstawie analizy aktów prawnych Watykanu można wysnuć tezę, że teraźniejsze prawodawstwo watykańskie w dużym stopniu aktualizuje się do obecnych potrzeb, nie tracąc przy tym swoich unikatowych cech. Głównym zamiarem było przedstawienie tego, czy i w jaki sposób Legge sulla cittadinanza, la residenza e l’accesso N.CXXXI zmienia obywatelstwo watykańskie oraz jakie różnice odnajdziemy w nowo powstałej ustawie. Proces ten oparto na metodzie komparatystycznej aktów prawnych, analizie piśmiennictwa, a także obserwacji wzajemnych związków i zależności. Na podstawie tego działania ustalono, że ustawa z 2011 r. pozostaje w pierwotnych ramach prawnych, lecz jej zmiana ma charakter praktyczny, mający dawać jednostkom swobodę w działaniu oraz nie ma ich doprowadzać do pojawienia się ewentualnych negatywnych skutków związanych z utratą obywatelstwa.
Źródło:
Opolskie Studia Administracyjno-Prawne; 2024, 22, 1; 131-142
2658-1922
Pojawia się w:
Opolskie Studia Administracyjno-Prawne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mailer, Doctorow, Roth. A Cross-Generational Reading of the American Berserk
Autorzy:
Matteson, John
Powiązania:
https://bibliotekanauki.pl/articles/625927.pdf
Data publikacji:
2020
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
protest
radicalism
liberalism
conscience
literature
Norman Mailer
E. L. Doctorow
Philip Roth
Opis:
Of all American paradoxes, none is greater than this: that the typical American cherishes free speech but is almost mortally offended by public protest, which he regards as at best lacking in taste and at worst an outright crime. A nation founded on dissent, America is exquisitely uncomfortable with ill-mannered disagreement. More than freedom itself, an American is likely to value moral insularity and absolution: he wants to live his life free from ethical challenge. He seeks suburban anesthesia, a life of commercial abundance untroubled by the pain inflicted elsewhere to maintain it, whether through military aggression or the global exploitation of labor. The American hopes to be reminded that he is good and blameless - and quickly condemns his critics as envious or mad or driven by dark agendas. As by an unwritten law, he denounces protest as an offense against his amour propre. This condemnation, ipso facto, makes a figurative criminal of the protester, who, when her efforts are scorned, finds herself not trying to persuade, but acting in a spirit of resentment and self-vindication. She sees any act by her countryman that does not challenge the social system as intolerable evidence of complicity and collaboration. The spirit of compromise vanishes, and the protester risks falling into the attitude described by Philip Roth as “the American berserk.” My address examines this process of polarization through three indispensable American novels of protest: Norman Mailer’s Armies of the Night; E.L. Doctorow’s The Book of Daniel; and Philip Roth’s American Pastoral.
Źródło:
Review of International American Studies; 2020, 13, 1; 53-74
1991-2773
Pojawia się w:
Review of International American Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MSIAC : Supporting the Munitions Safety Community
Autorzy:
Baker, E. L.
Powiązania:
https://bibliotekanauki.pl/articles/403699.pdf
Data publikacji:
2016
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
munitions
safety
risk
NATO
Opis:
The NATO Munitions Safety Information Analysis Center (MSIAC) is a multinational collaboration that collects, stores, and analyses technical information related to Munitions Safety (MS) and Insensitive Munitions (IM). This paper and presentation will provide an overview of MSIAC’s recent achievements in advancing munition safety efforts on behalf of its member nations. MSIAC supports its member nations through a variety of products and services. Poland is anticipated to become a member nation near the end of 2016. In addition to a core responsibility of addressing technical questions related to Munitions Safety posed by nations, MSIAC has a diverse programme of work aimed at developing and sharing the related underpinning scientific knowledge. This is then applied to support policy implementation and development related to munition safety. Some examples of current activities are given in this paper as well as future activities.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2016, 7, 4 (26); 7-22
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On prognosis of variation of properties of epitaxial layers by choosing of temperature field during growth
Przewidywanie zmian własności epitaksjalnych warstw poprzez dobór pola temperatury podczas wzrostu
Autorzy:
Pankratov, E.L.
Powiązania:
https://bibliotekanauki.pl/articles/29520278.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
epitaxial growth
epitaxial layer
properties
homogeneity of properties
wzrost epitaksjalny
warstwa epitaksjalna
właściwości
Opis:
In this paper, we analyze the influence of the temperature of growth of epitaxial layers during their growth. Conditions are formulated under which the homogeneity of the properties of the epitaxial layers increases. An analytical approach for the analysis of mass and heat transfer is proposed, allowing at the same time to take into account changes in the parameters of processes both in space and in time, as well as nonlinearity of these processes.
W artykule opisano analizę wpływu temperatury na wzrost epitaksjalnych warstw w procesie technologicznym. Sformułowano szereg warunków dla poprawy jednorodności badanych warstw. Wprowadzono analityczne rozwiązanie dla równania transportu masy i ciepła. To rozwiązanie umożliwiło uwzględnienie zmian parametrów procesu zarówno w przestrzeni jak i w czasie. Ponadto przeprowadzone rozwiązanie pozwoliło na uwzględnienie nieliniowości badanego procesu.
Źródło:
Computer Methods in Materials Science; 2020, 20, 1; 1-6
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Whey protein isolate hydrogel-based biomaterials
Autorzy:
Douglas, Timothy E.L
Powiązania:
https://bibliotekanauki.pl/articles/1844922.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
proteins
biomaterials
hydrożele
proteiny
biomateriały
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 55
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralized hydrogels for bone regeneration
Autorzy:
Douglas, T. E. L.
Powiązania:
https://bibliotekanauki.pl/articles/285625.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
biomaterials
bone regeneration
Opis:
Biomaterials for bone regeneration have predominantly been fabricated from inorganic substances such as various forms of calcium phosphate (CaP), e.g. hydroxyapatite, tricalcium phosphate and brushite. CaP materials are mechanical stable and bioactive, i.e. they form a direct bone with surrounding bone tissue. However, such pure CaP materials have certain drawbacks. They are brittle, difficult to handle in granulate form and difficult to shape in block form. Furthermore, the incorporation of biologically active substances is not easy. Hydrogels are highly hydrated three-dimensional polymer networks that are formed by crosslinking of polymer chains in solution. Hydrogels have been widely used as vehicles for drug delivery and are being used increasingly as biomaterials for tissue regeneration. As their main component is water, they have many advantages over pure inorganic materials. Firstly, the incorporation of water-soluble biologically active substances to promote tissue growth (e.g. growth factors) or to combat infection (e.g. antibiotics) is straightforward. Secondly, they are much less brittle. Thirdly, they can be implanted in a minimally invasive manner by injection, as they can undergo gelation, i.e. the transition from liquid to solid, after injection. However, their main disadvantage also stems from the fact that the mail component is water: hydrogels are mechanically weak. In order to combine the advantages of inorganic and hydrogel biomaterials, attention has recently been focused on the development of composites on the basis of mineralized hydrogels. Several strategies have been tried [1]. The most common strategy is the addition of preformed inorganic particles to the polymer solution before gelation, after which the particles remain entrapped in the crosslinked polymer network. Ideally, the particles can be distributed homogeneously in the hydrogel. The gelation process can be induced by addition of inorganic particles. For example, the addition of bioactive glass particles to a solution of the anionic polysaccharide gellan gum results in hydrogel formation due to release of ions from the particles [2]. In other words, the particles serve as an “ion-delivery system” to provide homogeneous gelation. Another strategy is to promote precipitation of the inorganic phase in the hydrogel by increasing the concentration of ions. This can be achieved biomimetically using the enzyme alkaline phosphatase (ALP) which is responsible for the mineralization of bone tissue in vivo by cleaving phosphate ions from organophosphate and thus increasing the local phosphate concentration, which in turn promotes CaP precipitation [3]. Yet another strategy is the incorporation of calcium- or phosphate-binding molecules in the hydrogel, in order to increase localion concentrations and promote CaP precipitation. Once such biomolecule is polydopamine, which binds calcium ions [4]. An added flexibility of mineralized hydrogels is the possibility of manipulation of either the hydrogel phase, or the inorganic phase, or both. For example, in the case of a hydrogel mineralized with CaP, the inorganic phase may be modified by incorporation of magnesium in order to promote adhesion and proliferation of bone-forming cells [5], or by incorporation of zinc in order to endow antibacterial activity [6]. Alternatively, the hydrogel phase may be modified by incorporation of biologically active molecules such as polyphenols, which both bind calcium ions and exhibit antibacterial activity [7]. Mineralization strategies will be illustrated on the basis of previous work [1-7].
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 8
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topological localization using appearance-based recognition
Autorzy:
Akers, E. L.
Agah, A.
Powiązania:
https://bibliotekanauki.pl/articles/384533.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
topological localization
mobile robotics
computer vision
appearance-based methods
Opis:
Localization is a fundamental problem of autonomous mobile robots. Localization is the determination of the position and orientation of a robot. Most localization systems are made up of several sensors and a map of the environment. Sophisticated localization systems can solve both the global location problem and the kid-napped robot problem. Global localization is the process of placing the robot into an unknown location within the map, and the robot should be able to locate itself within a relatively short period of time. The kidnapped robot problem is similar to global localization, as it is a test of how well the robot is able to recover after becoming lost. The robot is “teleported” to a new location, and the robot should again be able to determine its new location within a relatively short amount of time. CReSIS (Center for Remote Sensing of Ice Sheets) is developing autonomous robots in an effort to measure ice sheets characteristics in Greenland and Antarctica. These robots currently rely on differential GPS for localization and navigation. In order to survive for long periods of time in these environments, however, the robots need to be able to return to campsites in order to refuel and unload the data that has been acquired. In order to perform this task effectively and safely, a more elaborate system is required. A localization system that can recognize the dfferent locations of the campsites is the beginning of this process. The approach is to use a single camera for use in multiple types of large-scale environments, indoors and outdoors using a topological map. The system described uses an appearance-based approach for recognizing the different locations. The appearance-based methods attempt to recognize the appearance of a scene rather than specific objects. Several different types of features are tested including histograms, eigenimages, and Hu Moments. Using these simple features, the system is able to determine its location within the map at 95% accuracy.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 1; 68-84
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new chalicotherian finding from the Miocene karst in Poland (Mammalia, Badenian)
Nowe znalezisko chalikoteriów w Mioceńskim krasie Polski
Autorzy:
Korotkievich, E.L.
Sulimski, A.
Powiązania:
https://bibliotekanauki.pl/articles/23313.pdf
Data publikacji:
1990
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Źródło:
Acta Palaeontologica Polonica; 1990, 35, 1-2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multipliers of $L^{p}_{E}$, II
Autorzy:
Oberlin, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/1388972.pdf
Data publikacji:
1977
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Studia Mathematica; 1976-1977, 59, 3; 235-248
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Stages of Spiritual Life: Joseph Ḥazzāyā and the Greek Spiritual Legacy
Le tappe della vita spirituale: Giuseppe Ḥazzāyā e l’eredità ascetica greca
Etapy życia duchowego: Józef Ḥazzāyā i greckie dziedzictwo duchowe
Autorzy:
Havrylyk, Ihnatia
Powiązania:
https://bibliotekanauki.pl/articles/613485.pdf
Data publikacji:
2019
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
duchowość
Józef Ḥazzāyā
Ewagriusz z Pontu
etapy życia duchowego
kontemplacja
modlitwa
Syria
patrologia
spirituality
Joseph Ḥazzāyā
Evagrius of Pontus
stages of spiritual life
contemplation
prayer
patrology
Opis:
Dla Asyryjskiego Kościoła Wschodu V wiek stał się okresem przełomowym, w niektórzej mierze zmieniwszym wizerunek duchowo-teologiczny tego Kościoła. Chodzi o tłumaczeniu z języka greckiego na syryjski tekstów filozoficznych i dzieł Ojców greckich. Elementy duchowości greckiej stopniowo przenikały w syryjskie środowisko monastyczne, zostawiając na nim swój odbitek. W artykule w sposób panoramiczny przedstawiono wpływ greckiej tradycji ascetycznej na duchowość syryjską, na przykładzie doktryny autora duchowego z VIII w. Józefa Ḥazzāyā, uznawanego za systematyzatora całego syryjskiego doświadczenia duchowo-mistycznego. Doktryna Ḥazzāyā kształtowała się, niewątpliwie, na gruncie jego własnej tradycji syryjskiej, a również pod wpływem wielkich autorytetów duchowych innych tradycji: Ewagriusza z Pontu, Makarego Egipskiego, Jana z Apamei. U nich Józef zapożyczył pojęcia kluczowe swojej doktryny, po raz pierwszy wprowadzając tak zwaną trzystopniową syntezę życia duchowego, zawierającą rozpatrywane w artykule różne elementy.
For the Assyrian Church of the East, the 5th century became a turning point, which somewhat changed the spiritual and theological face of this Church. It marked the beginning of translations of the philosophical texts and works of the Greek Fathers from Greek into the Syriac language. Some elements of the Greek spirituality gradually penetrated into the Syriac monastic environment, leaving its imprint on it. This article presents a panoramic view of the influence of the Greek ascetic tradition on the Syriac spirituality, as exemplified by the teachings of Joseph Ḥazzāyā, a spiritual author of the 8th century, who is considered to be a systematizer of all Syriac spiritual and mystical experiences. The teaching of Ḥazzāyā was, without a doubt formed, on the basis of his own Syriac tradition, as well as under the influence of great spiritual authorities of other traditions: Evagrius of Pontus, Macarius of Egypt, and John of Apamea. From them, Joseph borrowed the key concepts of his doctrine, formulating it for the first time in the so-called three-stage synthesis of spiritual life, covering various elements that are analyzed in this article.
Źródło:
Vox Patrum; 2019, 71; 233-254
0860-9411
2719-3586
Pojawia się w:
Vox Patrum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange Splitting of Zero-Dimensional Exciton Levels
Autorzy:
Goupalov, S. V.
Ivchenko, E. L.
Powiązania:
https://bibliotekanauki.pl/articles/1969097.pdf
Data publikacji:
1998-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.70.Gm
73.20.Dx
78.66.-w
Opis:
A theory of nonanalytic (long-range) exchange interaction between an electron and a hole is developed for zero-dimensional excitons in semiconductor nanostructures. Two particular cases are considered in detail: (i) that of exciton confined in a spherical nanocrystal and (ii) a quantum-well exciton localized as a whole on an anisotropic island of well-width monolayer fluctuation.
Źródło:
Acta Physica Polonica A; 1998, 94, 2; 341-346
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Submonolayer Coverages Using Auger Escape Depths
Autorzy:
Godowski, P. J.
Hardegree, E. L.
Powiązania:
https://bibliotekanauki.pl/articles/1931323.pdf
Data publikacji:
1994-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
79.20.Fv
68.10.Jy
82.65.My
Opis:
A simple method for determining submonolayer adsorbate coverages by means of Auger electron spectroscopy is presented. The procedure is based on the ratio of low to high kinetic energy Auger signals from the substrate alone, therefore it does not require a direct measurement of adsorbate peaks. It may be of special interest in cases where the adsorbate signal is difficult or impossible to measure, as well as when adsorbate and substrate peaks overlap or when peaks are absent (H or He) or of low intensity. The method is tested by quantification of sulphur layer on the Ni(001) and on the polycrystalline iron surface.
Źródło:
Acta Physica Polonica A; 1994, 85, 5; 843-848
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free vibration analysis of porous functionally graded piezoelectric microplates resting on an elastic medium subjected to electric voltages
Autorzy:
Wu, C.-P.
Lin, E.-L.
Powiązania:
https://bibliotekanauki.pl/articles/38695702.pdf
Data publikacji:
2022
Wydawca:
Instytut Podstawowych Problemów Techniki PAN
Tematy:
consistent couple stress theory
functionally graded material
Winkler-Pasternak foundation
piezoelectric microplates
porous microplates
vibration
Opis:
Basing on the consistent couple stress theory (CCST), we develop a unified size-dependent shear deformation theory to analyze the free vibration characteristics of simply supported, porous functionally graded (FG) piezoelectric microplates which resting on the Winkler-Pasternak foundation are subjected to electric voltages. Various CCST-based shear deformation theories can be reproduced by incorporating their corresponding shape functions, which characterize the through-thickness distributions of the shear deformations, into the unified size-dependent theory. The reproduced CCST-based plate theories include the classical plate theory (CPT), the first-order shear deformation plate theory (SDPT), Reddy’s refined SDPT, the sinusoidal SDPT, the exponential SDPT, and the hyperbolic SDPT. The unified size-dependent theory is subsequently used to determine the natural frequencies of simply supported, porous FG piezoelectric microplates and their corresponding vibration mode shapes. The effects of the material length scale parameter, the length-to-thickness ratio, the material-property gradient index, different values of the applied voltages, the porosity parameter, different porosity distribution patterns, the Winkler spring coefficient, and the shear modulus of the surrounding medium on the natural frequencies of the porous FG piezoelectric microplates are examined and appear to be significant.
Źródło:
Archives of Mechanics; 2022, 74, 6; 463-511
0373-2029
Pojawia się w:
Archives of Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł

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