this paper is devoted to the spectral theory (more precisely, tothe variational theory of the spectrum) of guided waves in anelastic half cylinder.  we use variational methods to investigateseveral aspects of propagating waves, including localization (seefigure 1), existence criteria and the formulas to find them. weapproach the problem using two complementary methods: thevariational methods fo...

we study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. we discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. this second part continues to study the question of catecoricitytrans...

our main aim in this article is to analyze the two concepts “proposition” and “state of affairs”. first we present the minimal expectations of a theory of “proposition” and a theory of “state of affairs”, and then we turn to the views of the contemporary theorist john pollock regarding these two topics and present the most important of his views on the subject. subsequently, we reconstruct a th...

in this paper, the behavior of free vibrations and buckling of the sandwich panel with a flexible core was investigated using a new improved ‎high-order sandwich panel theory. in this theory, equations of motion were formulated based on shear stresses in the core. first-order shear deformation theory was ‎applied for the procedures. in this theory, for the first time, incompatibility problem of...

Background and aim: Grounded theory has taken some different theoretical perspectives since its creation in 1967 by Barney Glaser. Considering that applying grounded theory partly depends on an awareness of its philosophical perspectives, gaining knowledge about these various perspectives is required for health care professionals who are interested in studying the social processes. This review ...

plotinus' attempt to counter the aristotle critiques on plato's theory of ideas, leads to his theory of emanation, which is called double act doctrine. plotinus is influenced by aristotle, not only in raising the problem of emanation quality, but the language and terms (including reasonable matter, indefinite dyad and activity) that are used to describe his theory. also, the theory of...

the realization optimality theory is a recent development in the original optimality theory which is proposed to deal with morphological issues especially the inflectional ones. its main idea is to consider the morphological realization rules as ranked violable language-specific constraints that control the realization processes and provide phonological information of grammatical morphemes. thi...

this paper presents the bending analysis of annular plates by the indirect trefftz boundary approach. the formulation for thin and thick plates is based on the kirchhoff plate theory and the reissner plate theory. the governing equations are therefore a fourth-order boundary value problem and a sixth-order boundary value problem, respectively. the trefftz method employs the complete set of solu...