bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Different Imagination: Authenticity and Inauthenticity of Narrating Kashmir
Authors: Dutta Abhijit 
Published: February 2021

Abstract
More than two decades of violent conflict has earned Kashmir international fame as the most militarized place on earth and a nuclear flashpoint. Within India, the discourse on Kashmir is a polarizing force, with contesting meaning systems co-existing in parallel. Each of these meaning systems is cultivated through a complex of vested inter-textual narratives, including literature and film, and marketed as “authentic” interpretations of Kashmir via incestuous cross-referencing. In the absence of access to the “real” Kashmir in any direct way, these narratives serve as the only sources for Indians to construct their imagination of this troubled land. This paper uses the example of Kashmiriyat - a differently interpreted ethno-social construct - to illustrate the structural divisions in the narrativization of Kashmir. This is done via a Peircean reading of specimen texts that conform to three general categories - Hindu Indian nationalist, Muslim Indian nationalist of Kashmiri origin, and resident Kashmiri Muslim - and mapping their meaning using the trichotomy of Interpretants. In conclusion, it is proposed that any hope of a resolution of the Kashmir conflict needs to locate the discrete meaning systems illustrated by the paper in a “philosophical space” (Poole, 1972) - a space that allows a more inclusive and meaningful imagination, a different imagination of Kashmir.
Postnatal ultrasound follow-up in neonates with prenatal hydronephrosis
Authors: Kebriyaei Elham , Davoodi Ali , Kazemi Seyed Alinaghi , Bazargani Zahra 
Published: February 2021

Abstract

Objectives
Renal anomalies are the most common fetal abnormalities that occur during prenatal development, and are typically detected by observing hydronephrosis on fetal ultrasound imaging. Follow-up with post-natal ultrasound is important to detect clinically-important obstruction, because many of the pre-natal abnormalities resolve spontaneously. This study aimed to evaluate the postnatal hydronephrosis follow-up rate, and reasons for non follow-up in affected neonates.

Methods
In this cross-sectional study all neonates born during a period of one year at Ayatollah Mousavi Hospital with hydronephrosis on fetal ultrasound imaging were recruited. All mothers were also given face-to-face information about fetal hydronephrosis and its postnatal outcomes, and follow-up with at least a postnatal ultrasound was recommended from the fourth day of their neonates’ birth until the end of the fourth week. The neonates were subsequently observed for one month to determine the postnatal ultrasound follow-up rate and to reflect on diagnostic test results, reasons for failure to follow-up, as well as causes of hydronephrosis.

Results
In this study, 71 cases (1.2%) out of 5,952 neonates had fetal hydronephrosis on prenatal ultrasound images. The postnatal ultrasound imaging showed kidney involvement in 18 neonates (25%), particularly in the left kidney (61.1%). Seven neonates had no follow-up at one month (10%). No significant relationship was found between lack of follow-up and the neonates’ place of residence (p=0.42), maternal education (p=0.90), number of siblings (p=0.33), or gender (p=0.64).

Conclusions
Postnatal ultrasound follow-up rate in these neonates with a history of fetal hydronephrosis was incomplete even though parents had been provided with education and advice at their birth time. Accordingly, it is recommended to perform postnatal ultrasound once neonates are discharged from hospitals.
Optimal Design of Cymbal Stack Transducer in a Piezoelectric Linear Actuator by Finite Element Method
Authors: Sheng Wen , Tiemin Zhang , Jiantao Zhang , Xiuli Yang 
Published: February 2021

Abstract
The optimal design of a piezoelectric linear actuator using parametric optimum method-based finite element method (FEM) was presented. First, the FEM model of the cymbal stack transducer was generated with its initial configuration. The structural parameters were chosen as the design variables and the displacement on the top surface of the transducer taken as the objective function. Second, the zero-order optimization method was chosen as the basic tool of the structural updating. The structural optimization scheme of the cymbal stack transducer was carried out based on ANSYS parametric design language (APDL). Finally, an example of dynamic response analysis was performed on the cymbal stack transducer to verify the structural optimization scheme. The results show that the displacement on the top surface is increased by 32.9% compared with the case of initial configuration.
Bosnian, Croatian, Serbian: Inherent Translanguaging in the Linguistic Landscape of Sarajevo
Authors: Tankosić Ana , Litzenberg Jason 
Published: February 2021

AbstractLanguage in the Balkan region of Southeastern Europe has a complex and turbulent history, acutely embodied in the tripartite and trilingual state of Bosnia and Herzegovina (BiH) in which Bosniaks, Croats, and Serbs all make claim to their own mutually-intelligible varieties of local “languages”. This study utilizes a linguistic landscape methodology to consider language use in Sarajevo, the capital of BiH, approximately 20 years after a brutal war that led to the establishment of the country. Data originate from three municipalities within the Sarajevo Canton – namely, Old Town, Center, and Ilidža – because of their representation of the region’s diversity and history. Signs were classified according to the three primary language varieties, i.e., Bosnian, Croatian, Serbian; BCS, representing a common core among the three varieties, as well as English, other languages, and mixed languages. The application of BCS uniquely positions the present research in comparison to other studies of language use in the region and allows for a more nuanced, less politically and ethnolinguistically fraught analysis of the communicative tendencies of users. More specifically, data indicate that actors in the linguistic landscape transcend the boundaries of their national, ethnic, and religious identities by tending towards the more neutral BCS, suggesting an orientation towards more translingual dispositions than previous variety-bound approaches have indicated. Thus, instead of the divisiveness of linguistic identity politics, the linguistic landscape of Sarajevo indicates a tendency toward inclusion and linguistic egalitarianism.
Folklore as an evidential category
Authors: Kittilä Seppo 
Published: February 2021

AbstractFolklore refers to information that we have learnt as a part of the history of our own people and that has passed on from generation to generation for hundreds, or even thousands of years. This paper shows that as an information source folklore has features in common with other information sources, most notably hearsay, but it nevertheless constitutes an information source of its own, characterized as [−personal] [−direct] and [+internalized]. In addition, the paper proposes a formal-functional typology based on the element used for folklore coding. It is also shown that the semantic similarity of the coded element with the proposed definition of folklore corresponds to its frequency. Finally, the paper discusses the central theoretical implications this study has for our understanding of evidentiality.
An Evaluation of the Permittivity of Two Different Rock Types Using Microwave Resonator and Waveguide Cutoff Principles
Authors: Olkkonen Martta-Kaisa , Eskelinen Pekka , Huuskonen-Snicker Eeva , Pellinen Terhi , Olmos Martinez Pablo 
Published: February 2021

Abstract
Methods of measuring the complex permittivity of different rock types are demonstrated in the frequency range from 6 GHz to 17 GHz. The used methods are based on the cylindrical resonator and waveguide cutoff frequency principles. This study is part of a larger research project that aims to characterize the electrical properties of asphalt for road surveying purposes. The studied rock types are metavolcanic rock with intermediate composition and pegmatite. The permittivity values gained with the resonator method are 6.2 for the metavolcanic rock and 4.5 for the pegmatite rock type, whereas the imaginary parts are 0.04 and 0.02. The permittivity values gained with the cutoff frequency method are 6.17 and 4.76 respectively. A reference measurement was made only for the metavolcanic rock in a transmission configuration with two antennas and the permittivity result was 6.21. The three different methods provide consistent permittivity values and are suitable for reliable permittivity evaluation.
Tunable Phase Shifter Based on Inkjet-Printed Ferroelectric MIM Varactors
Authors: Nikfalazar Mohammad , Wiens Alex , Mikolajek Morten , Friederich Andreas , Kohler Christian , Sohrabi Mojtaba , Zheng Yuliang , Kienemund Daniel , Melnyk Sergiy , Binder Joachim R. , Jakoby Rolf 
Published: February 2021

Abstract
This paper presents a new method for the fabrication of tunable multilayer ferroelectric components based on inkjet printing. Inkjet printing is a low-cost technology for selective film fabrication and has high potential for the preparation of tunable dielectric layers for radio frequency and microwave applications.
With this technology, tunable metal-insulator-metal (MIM) capacitor is fabricated, that is composed of inkjet-printed Barium-Strontium-Titanate striplines and photo-lithographically structured gold electrodes. Compared to coplanar capacitors, such MIM varactors require significantly lower DC-voltage for tuning. By applying 20 V across a 1 μm-thick BST film, a tunability of 33% is achieved at 8 GHz and tunability of 60% by applying 50 V. To demonstrate the field of application of this MIM varactor, a tunable phase shifter is designed and fabricated at 8 GHz. A phase shift of 143° and a figure of merit (FoM) of 28°/dB are achieved by applying maximum 50 V tuning voltage.
Second Harmonic Suppression in S-Band Traveling Wave Tube Tapers
Authors: Gehrmann Elke , Birtel Philip , Dürr Wolfgang , André Frédéric , Jacob Arne F. 
Published: February 2021

Abstract
Traveling wave tubes (TWTs) operating at S-band are to be improved by suppressing the second harmonic frequency. Among the different possibilities, two techniques, namely harmonic injection and a filter helix for frequency selective signal suppression, are studied in more detail and applied to S-band tubes in both simulation and measurement. In addition, their suitability to improve tube performance by reducing the second harmonic is discussed. Moreover, filter helix implementation in TWTs with an arbitrary pitch profile along the interaction area is considered. In this context, the dependence of the pitch discontinuity reflection coefficient on several filter helix parameters is investigated. The influence of those parameters on the filter performance is shown by filter helix optimization. Measurement results of the optimized filter helix TWT are presented.
A Self-Adjoint “Simultaneous Crossing of the Axis”
Authors: Kreith Kurt 
Published: February 2021

Abstract
By constructing the corresponding Green's function in a trapezoidal domain, we establish the existence of self-adjoint realizations of incorporating boundary conditions of the form u(s, 0) = u(s, T) = 0. Such operators correspond to the historically important concept of a ”simultaneous crossing of the axis” for vibrating strings.
Stabilization of Functions and its Application
Authors: Kudryavtsev L. D. 
Published: February 2021

Abstract
The concepts of polynomial stabilization, strong polynomial stabilization, and strong stabilization are introduced for a fundamental system of solutions of linear differential equations. Some criteria of such kinds of stabilizations and applications to the theory of existence and uniqueness of solutions of ordinary differential equations are given. An abstract scheme of the obtained results is presented for Banach spaces.
Limit Distribution of the Integrated Squared Error of Trigonometric Series Regression Estimator
Authors: Nadaraya E. 
Published: February 2021

Abstract
Limit distribution is studied for the integrated squared error of the projection regression estimator (2) constructed on the basis of independent observations (1). By means of the obtained limit theorems, a test is given for verifying the hypothesis on the regression, and the power of this test is calculated in the case of Pitman alternatives.
On the Correctness of Linear Boundary Value Problems for Systems of Generalized Ordinary Differential Equations
Authors: Ashordia M. 
Published: February 2021

Abstract
The sufficient conditions are established for the correctness of the linear boundary value problem

dx(t) = dA(t) · x(t) + df(t); l(x) = c
0,
where and are matrix- and vector-functions of bounded variation, , and l is a linear continuous operator from the space of n-dimentional vector-functions of bounded variation into .
On the Boundedness of Cauchy Singular Operator from the Space Lp
to Lq
, p > q ≥ 1
Authors: Khuskivadze G. , Paatashvili C. 
Published: February 2021

Abstract
It is proved that for a Cauchy type singular operator, given by equality (Khvedelidze, Current problems of mathematics 7: 5-162, 1975), to be bounded from the Lebesgue space Lp
(Γ) to Lq
(Γ), as , it is necessary and sufficient that either condition (Calderon, Proc. Nat. Acad. Sci. USA 4: 1324-1327, 1977) or (David, L'integrale de Cauchy sur le courbes rectifiables, Prepublications Univ. Paris–Sud; Dept. Math., 1982) be fulfilled.
On Some Generalizations of the Vandermonde Matrix and Their Relations with the Euler Beta-Function
Authors: Lomidze I. 
Published: February 2021

Abstract
A multiple Vandermonde matrix which, besides the powers of variables, also contains their derivatives is introduced and an explicit expression of its determinant is obtained. For the case of arbitrary real powers, when the variables are positive, it is proved that such generalized multiple Vandermonde matrix is positive definite for appropriate enumerations of rows and columns. As an application of these results, some relations are obtained which in the one-dimensional case give the well-known formula for the Euler beta-function.
Construction of Entire Modular Forms of Weights 5 and 6 for the Congruence Group Γ0(4N)
Authors: Lomadze G. 
Published: February 2021

Abstract
Two classes of entire modular forms of weight 5 and two of weight 6 are constructed for the congruence subgroup Γ0(4N). The constructed modular forms as well as the modular forms from [Lomadze, Georgian Math. J. 1: 53-76, 1994] will be helpful in the theory of representation of numbers by the quadratic forms in 10 and 12 variables.
Some Negative Results Concerning the Process of Fejér Type Trigonometric Convolution
Authors: Oniani G. 
Published: February 2021

Abstract
The process of Fejér type trigonometric convolution and its discrete analogue have equivalent uniform residues. The situation changes under pointwise comparison. In this direction negative results have been obtained by different authors. One result of such a type is given in the present paper. In particular, a counter-example is constructed for which both comparisons diverge on the set of complete measure. The smoothness of the counter-example as well as some other problems are investigated.
On Proper Oscillatory and Vanishing at Infinity Solutions of Differential Equations with A Deviating Argument
Authors: Kiguradze I. , Chichua D. 
Published: February 2021

Abstract
Sufficient conditions are found for the existence of multiparametrical families of proper oscillatory and vanishing-at-infinity solutions of the differential equation
u(n) (t) = g(t, u(τ
0 (t)); . . ., u(m–1) (τ

m
–1(t))),
where n ≥ 4, m is the integer part of , g : R
+ × R

m
→ R is a function satisfying the local Carathéodory conditions, and τi
: R
+ → R (i = 0, . . . , m – 1) are measurable functions such that τ (t) → +∞ for t → + ∞ (i = 0, . . ., m – 1).
Fixed Points of Semigroups of Lipschitzian Mappings Defined on Nonconvex Domains
Authors: Tan Kok-Keong , Xu Hong-Kun 
Published: February 2021

Abstract
Certain fixed point theorems are established for nonlinear semigroups of Lipschitzian mappings defined on nonconvex domains in Hilbert and Banach spaces. Some known results are thus generalized.
An Algebraic Model of Fibration with the Fiber K(π, n)-Space
Authors: Berikashvili N. 
Published: February 2021

Abstract
For a fibration with the fiber K(π, n)-space, the algebraic model as a twisted tensor product of chains of the base with standard chains of K(π, n)-complex is given which preserves multiplicative structure as well. In terms of this model the action of the n-cohomology of the base with coefficients in π on the homology of fibration is described.
Estimation of the Integral Modulus of Smoothness of an Even Function of Several Variables with Quasiconvex Fourier Coefficients
Authors: Tevzadze T. 
Published: February 2021

Abstract
The estimate of the modulus of smoothness of an even function of several variables with quasiconvex Fourier coefficients obtained in this paper extends one result of S. A. Telyakovski.
On Some Entire Modular Forms of Weights and for the Congruence Group Γ0(4N)
Authors: Lomadze G. 
Published: February 2021

Abstract
Entire modular forms of weights and for the congruence group Γ0(4N) are constructed, which will be useful for revealing the arithmetical sense of additional terms in formulas for the number of representations of positive integers by quadratic forms in 7 and 9 variables.
Spatial Problem of Darboux Type for One Model Equation of Third Order
Authors: Jokhadze O. 
Published: February 2021

Abstract
For a hyperbolic type model equation of third order a Darboux type problem is investigated in a dihedral angle. It is shown that there exists a real number ρ0 such that for α > ρ0 the problem under consideration is uniquely solvable in the Frechet space. In the case where the coefficients are constants, Bochner's method is developed in multidimensional domains, and used to prove the uniquely solvability of the problem both in Frechet and in Banach spaces.
Littlewood–Paley Operators on the Generalized Lipschitz Spaces
Authors: Lu Shanzhen , Tan Changmei , Yabuta Kozo 
Published: February 2021

Abstract
Littlewood–Paley operators defined on a new kind of generalized Lipschitz spaces are studied. It is proved that the image of a function under the action of these operators is either equal to infinity almost everywhere or is in , where –n < α < 1 and 1 < p < ∞.
Three-Dimensional Boundary Value Problems of Elastothermodiffusion with Mixed Boundary Conditions
Authors: Burchuladze T. , Bezhuashvili Yu. 
Published: February 2021

Abstract
We investigate the basic boundary value problems of the connected theory of elastothermodiffusion for three-dimensional domains bounded by several closed surfaces when the same boundary conditions are fulfilled on every separate boundary surface, but these conditions differ on different groups of surfaces. Using the results of papers [Kupradze, Gegelia, Basheleishvili, and Burchuladze, Three-dimensional problems of the mathematical theory of elasticity and thermoelasticity, North-Holland Publishing Company, 1979, Russian original, 1976–Mikhlin, Multi-dimensional singular integrals and integral equations, 1962], we prove theorems on the existence and uniqueness of the classical solutions of these problems.
On the Integrability of the Ergodic Hilbert Transform for A Class of Functions with Equal Absolute Values
Authors: Ephremidze L. 
Published: February 2021

Abstract
It is proved that for an arbitrary non-atomic finite measure space with a measure-preserving ergodic transformation there exists an integrable function f such that the ergodic Hilbert transform of any function equal in absolute values to f is non-integrable.
On the Solvability of Nonlinear Boundary Value Problems for Functional Differential Equations
Authors: Kiguradze I. , Půža B. 
Published: February 2021

Abstract
Sufficient conditions are established for the solvability of the boundary value problem

where p : C(I; Rn
) × C(I; Rn
) → L(I; Rn
), q : C(I; Rn
) → L(I; Rn
), l : C(I; Rn
) × C(I; Rn
) → Rn
, and cn
: C(I; Rn
) → Rn
are continuous operators, and p(x, ·) and l(x, ·) are linear operators for any fixed x ∈ C(I; Rn
).
Monotone Solutions of A Higher Order Neutral Difference Equation
Authors: Cheng Sui Sun , Zhang Guang 
Published: February 2021

Abstract
A real sequence {xk
} is said to be (*)-monotone with respect to a sequence {pk
} and a positive integer σ if xk
> 0 and (–1)
n
Δ
n
(xk
– pkxk–σ
) ≥ 0 for n ≥ 0. This paper is concerned with the existence of (*)-monotone solutions of a neutral difference equation. Existence criteria are derived by means of a comparison theorem and by establishing explicit existence criteria for positive and/or bounded solutions of a majorant recurrence relation.
Several Cohomology Algebras Connected with the Poisson Structure
Authors: Giunashvili Z. 
Published: February 2021

Abstract
The structure of a Lie superalgebra is defined on the space of multiderivations of a commutative algebra. This structure is used to define some cohomology algebra of Poisson structure. It is shown that when a commutative algebra is an algebra of 𝐶∞-functions on the 𝐶∞-manifold, the cohomology algebra of Poisson structure is isomorphic to an algebra of vertical cohomologies of the foliation corresponding to the Poisson structure.
Thermoelastic Equilibrium of Bodies in Generalized Cylindrical Coordinates
Authors: Khomasuridze N. 
Published: February 2021

Abstract
Using the method of separation of variables, an exact solution is constructed for some boundary value and boundary-contact problems of thermoelastic equilibrium of one- and multilayer bodies bounded by the coordinate surfaces of generalized cylindrical coordinates ρ, α, 𝑧. ρ, α are the orthogonal coordinates on the plane and 𝑧 is the linear coordinate. The body, occupying the domain Ω = {ρ
0 < ρ < ρ
1, α
0 < α < α
1, 0 < 𝑧 < 𝑧1}, is subjected to the action of a stationary thermal field and surface disturbances (such as stresses, displacements, or their combinations) for 𝑧 = 0 and 𝑧 = 𝑧1. Special type homogeneous conditions are given on the remainder of the surface. The elastic body is assumed to be transversally isotropic with the plane of isotropy 𝑧 = const and nonhomogeneous along 𝑧. The same assumption is made for the layers of the multilayer body which contact along 𝑧 = const.
On the Representation of Numbers by the Direct Sums of Some Binary Quadratic Forms
Authors: Kachakhidze N. 
Published: February 2021

Abstract
The systems of bases are constructed for the spaces of cusp forms Sk
(Γ0(3), χ) (k≥6), Sk
(Γ0(7), χ) (k≥3) and Sk
(Γ0(11), χ) (k≥3). Formulas are obtained for the number of representation of a positive integer by the sum of k binary quadratic forms of the kind , of the kind and of the kind .
Asymptotic Distribution of Eigenfunctions and Eigenvalues of the Basic Boundary-Contact Oscillation Problems of the Classical Theory of Elasticity
Authors: Burchuladze T. , Rukhadze R. 
Published: February 2021

Abstract
The basic boundary-contact oscillation problems are considered for a three-dimensional piecewise-homogeneous isotropic elastic medium bounded by several closed surfaces. Using Carleman's method, the asymptotic formulas for the distribution of eigenfunctions and eigenvalues are obtained.
On the Integrability of Strong Maximal Functions Corresponding to Different Frames
Authors: Oniani G. 
Published: February 2021

Abstract
For the frame θ in , let B
2(θ)(𝑥) (𝑥 ∈ ) be a family of all 𝑛-dimensional rectangles containing 𝑥 and having edges parallel to the straight lines of θ, and let MB2(θ)
be a maximal operator corresponding to B
2(θ). The main result of the paper is the following

Theorem.
For any function 𝑓 ∈ 𝐿 (1 + ln+ 𝐿)() (𝑛 ≥ 2) there exists a measure preserving and invertible mapping

such that

1.
{𝑥 : ω(𝑥) ≠ 𝑥} ⊂ supp 𝑓;

2.

This theorem gives a general solution of M. de Guzmán's problem that was previously studied by various authors.