bluuebunny/crossref_metadata_2025_split huggingface dataset:
On the operad of associative algebras with derivation
Authors: Loday Jean-Louis 
Published: February 2021

Abstract
We study the operad of associative algebras equipped with a derivation. We show that it is determined by polynomials in several variables and substitution. Replacing polynomials by rational functions gives an operad which is isomorphic to the operad of “moulds”. It provides an efficient environment for doing integro-differential calculus. Interesting variations are obtained by using formal group laws. The preceding case corresponds to the additive formal group law. We unravel the notion of homotopy associative algebra with derivation in the spirit of Kadeishvili's work.
Distortion of the Grötzsch–Belinskii type for generalized quasiconformal mappings
Authors: Golberg Anatoly 
Published: February 2021

Abstract
The geometric properties of quasiconformal mappings and generalized quasiconformal mappings are studied. Inequalities of the Grötzsch–Belinskii type are established to estimate the distortion of p-moduli of ring domains for these classes of mappings.
Coincidence and fixed points for hybrid tangential maps
Authors: Kamran Tayyab , Kiran Quanita 
Published: February 2021

Abstract
In [Int. J. Math. Math. Sci. 2005: 3045–3055] by Liu et al. the common property (E.A) for two pairs of hybrid maps is defined. Recently, O'Regan and Shahzad [Acta Math. Sin. (Engl. Ser.) 23: 1601–1610, 2007] have introduced a very general contractive condition and obtained some fixed point results for hybrid maps. We introduce a new property for pairs of hybrid maps that contains the property (E.A) and obtain some coincidence and fixed point theorems that extend/generalize some results from the above-mentioned papers.
An operator version of Abel's continuity theorem
Authors: Tarieladze Vaja 
Published: February 2021

Abstract
For a Banach space X let 𝔄 be the set of continuous linear operators A : X → X with ‖A‖ < 1, I be the identity operator and
𝔄
c
≔ {A ∈ 𝔄 : ‖I – A‖ ≤ c(1 – ‖A‖)},
where c ≥ 1 is a constant. Let, moreover, (xk
)
k≥0 be a sequence in X such that the series converges and ƒ : 𝔄 ∪ {I} → X be the mapping defined by the equality

It is shown that ƒ is continuous on 𝔄 and for every c ≥ 1 the restriction of ƒ to 𝔄
c
∪ {I} is continuous at I.
On a relationship between the measurability and continuity of real-valued functions
Authors: Kharazishvili Alexander 
Published: February 2021

Abstract
We discuss certain relationships between the following fundamental concepts of analysis: measurability and continuity. Some examples are presented, which underline deep connections between measurable and continuous real-valued functions. In particular, a variant of Luzin's C-property is formulated for a class of measures significantly wider than the class of Borel measures. In this context, absolutely nonmeasurable functions and Sierpiński–Zygmund type functions are considered and compared.
On the statistical estimation of the logarithmic derivative of a measure in a Hilbert space
Authors: Nadaraya Elizbar , Sokhadze Grigol 
Published: February 2021

Abstract
We consider the problem of statistical estimation of the logarithmic derivative of a measure in an infinite-dimensional Hilbert space. It is shown that an approximating sequence of finite-dimensional estimates can be constructed for the unknown logarithmic derivative using independent observation data.
Function classes and convergence almost everywhere
Authors: Tsagareishvili Vakhtang 
Published: February 2021

Abstract
For a certain class of orthonormal systems (ONS) on [0, 1] there exists a family of functions from L
2(0, 1), independent from that class, such that the Fourier series with respect to each ONS of the class converges a.e. for any member of the family. Similar result holds for the summability of Fourier integrals.
Electromagnetic scattering by cylindrical orthotropic waveguide irises
Authors: Castro Luis P. , Duduchava Roland , Kapanadze David 
Published: February 2021

Abstract
The paper is devoted to the mathematical analysis of scattered time-harmonic electromagnetic waves by an infinitely long cylindrical orthotropic waveguide iris. This is modeled by an orthotropic Maxwell system in a cylindrical waveguide iris for plane waves propagating in the x
3-direction, imbedded in an isotropic infinite medium. The problem is equivalently reduced to a 2-dimensional boundary-contact problem with the operator div M grad+k
2 inside the domain and the (Helmholtz) operator Δ+k
2 = div grad+k
2 outside the domain. Here M is a 2 × 2 positive definite, symmetric matrix with constant, real valued entries. The unique solvability of the appropriate boundary value problems is proved and the regularity of solutions is established in Bessel potential spaces.
Screen slant lightlike submanifolds of indefinite cosymplectic manifolds
Authors: Gupta Ram Shankar 
Published: February 2021

Abstract
In this paper, we introduce the notion of a screen slant lightlike submanifold of an indefinite cosymplectic manifold. We provide a characterization theorem for the existence of a screen slant lightlike submanifold with examples. Also, we give an example of a minimal screen slant lightlike submanifold of and prove some characterization theorems.
Boundedness of linear operators via atoms on Hardy spaces with non-doubling measures
Authors: Yang Dachun , Yang Dongyong 
Published: February 2021

Abstract
Let μ be a non-negative Radon measure on which satisfies only the polynomial growth condition. Let 𝒴 be a Banach space and H
1(μ) be the Hardy space of Tolsa. In this paper, the authors prove that a linear operator T is bounded from H
1(μ) to 𝒴 if and only if T maps all (p, γ)-atomic blocks into uniformly bounded elements of 𝒴; moreover, the authors prove that for a sublinear operator T bounded from L
1(μ) to L
1, ∞(μ), if T maps all (p, γ)-atomic blocks with p ∈ (1, ∞) and γ ∈ ℕ into uniformly bounded elements of L
1(μ), then T extends to a bounded sublinear operator from H
1(μ) to L
1(μ). For the localized atomic Hardy space h
1(μ), the corresponding results are also presented. Finally, these results are applied to Calderón–Zygmund operators, Riesz potentials and multilinear commutators generated by Calderón–Zygmund operators or fractional integral operators with Lipschitz functions to simplify the existing proofs in the related papers.
Normality and shared values concerning differential polynomial
Authors: Lei Chunlin L. , Yang Degui G. , Zeng Cuiping P. 
Published: February 2021

Abstract
Let ℱ be a family of meromorphic functions in a domain D; let k ≥ 2 be a positive integer; and let a, b and c be complex numbers such that b ≠ 0 and a ≠ c. If, for each ƒ ∈ ℱ, all zeros of ƒ have multiplicity at least k, ƒ(z) = a ⇔ D(ƒ) = b, and D(ƒ) = 0 ⇒ ƒ(z) = c, where D(ƒ) is the differential polynomial of ƒ(z), then ℱ is normal in D.
On a relationship between absolutely nonmeasurable functions and Sierpiński–Zygmund functions
Authors: Kharazishvili Alexander 
Published: February 2021

Abstract
For a given topological space E, some properties of absolutely nonmeasurable real-valued functions, with respect to a certain class of measures on E, are considered. These functions are compared with Sierpiński–Zygmund type real-valued functions on E which have the property that they are discontinuous on every uncountable subset of E.
Graded primal ideals
Authors: Atani Shahabaddin Ebrahimi , Darani Ahmad Yousefian 
Published: February 2021

Abstract
Let R be a graded commutative ring. This paper is devoted to study some properties of graded primal ideals of R. In particular we show that there is a one-to-one correspondence between the graded P-primal ideals of R and the graded PS
-primal ideals of RS
, where S is a multiplicatively closed subset of homogeneous elements of R and P is a graded prime ideal of R with P ∩ S = ø.
DURABLE RESISTANCE TO BROOMRAPE (Orobanche cumana Wallr. / Orobanche cernua Loefl.) IN SUNFLOWER / RESISTENCIA CONSTANTE A LA OROBANCA (Orobanche cumana Wallr./Orobanche cernua Loefl.) EN EL GIRASOL / RÉSISTANCE DURABLE À L’OROBANCHE (Orobanche cumana Wallr./Orobanche cernua Loefl.) CHEZ LE TOURNESOL
Authors: Venkov Ventsislav , Shindrova Pepa 
Published: February 2021

SUMMARY
Six cultivars and one hybrid were evaluated for resistance to broomrape in the period 1988-1999. It was found that the resistance varied in the range from 0 to 100%. The evaluation was carried out under greenhouse conditions. Infestations were induced by mixed broomrape populations collected from different regions in Bulgaria. Different lines obtained from three cultivars, Progress, Oktjabr (Russia) and Vega (Bulgaria), and the hybrid Sorem 80 (Romania) showed stable resistance (80-100%) after ten years of evaluation, in spite of the occurrence and distribution of new races (D+E) of the parasite in Bulgaria.
Processing and Characterization of CrB2-Based Novel Composites
Authors: Bedse R. D. , Sonber J. K. , Sairam K. , Murthy T. S. R. Ch. , Hubli R. C. 
Published: February 2021

Abstract
This paper presents the results of investigations carried out on processing and characterization of CrB2-based novel composites. Niobium metal powder was used as additive to form new composites. Hardness and fracture toughness of chromium boride increased by addition of niobium. CrB2 composites were prepared by addition of 2.5, 10 and 20 wt.% Nb. Density of higher than 95% ρ
th was achieved in all the samples. Hot pressed samples were analyzed to contain reaction products of NbB2, Cr2B3 and Cr3B4 phases along with CrB2. Hardness of CrB2 composite was increased from 18.46 GPa to 21.89 GPa by increasing the Nb content from 2.5 to 10 wt.%. Fracture toughness of composites prepared by addition of 2.5 and 10% was measured as 3.11 and 3.38 MPa.m1/2 respectively. Addition of 20% Nb resulted in increased fracture toughness of 4.32 MPa.m1/2
.
A Characterization of Hot Flow Behaviors Involving Different Softening Mechanisms by ANN for As-Forged Ti-10V-2Fe-3Al Alloy
Authors: Quan Guo-zheng , Zou Zhen-yu , Wen Hai-rong , Pu Shi-ao , Lv Wen-quan 
Published: February 2021

Abstract
The isothermal compressions of as-forged Ti-10V-2Fe-3Al alloy at the deformation temperature range of 948–1,123 K and the strain rates in the range of 0.001–10 s−1 with a height reduction of 60% were conducted on a Gleeble-3500 thermo-mechanical simulator. The flow behaviors show nonlinear sensitivity to strain, strain rate and temperature. Based on the experimental data, an artificial neural network (ANN) with back-propagation algorithm was developed to deal with the complex deformation behavior characteristics. In the present ANN model, strain, strain rate and temperature were taken as inputs, and flow stress as output. A comparative study on the constitutive relationships based on regression and ANN methods was conducted. According to the predicted and experimental results, the predictabilities of the two models have been evaluated in terms of correlation coefficient (R) and average absolute relative error (AARE). The R-value and the AARE-value at strain of 0.5 from the ANN model is 0.9998 and 0.572%, respectively, better than 0.9902 and 6.583% from the regression model. The predicted strain–stress curves outside of experimental conditions indicate similar characteristics with experimental curves. The results have sufficiently articulated that the well-trained ANN model with back-propagation algorithm has excellent capability to deal with the complex flow behaviors of as-forged Ti-10V-2Fe-3Al alloy.
(In)Security and Self-Government: Lessons from the Mexican Experience
Authors: Correa Catalina Pérez , Xochitiotzi Carlos De la Rosa 
Published: February 2021

Abstract
Using the Mexican experience in the centralization of public security, this paper proposes federalism as a model of a vertical control of powers and, more importantly, a way of promoting self-governance, citizen participation and, through them, local security. We argue that while federalism as an organizational model of the State does not guarantee self-governance or citizen participation, it can help promote them and through their enhancement, improve security at the community level. Since 2006, the Mexican government has implemented a security strategy that has increasingly centralized public security decisions. The strategy relies on the deployment of federal security forces (Army, Navy and Federal Police) across the country, to replace or support state and local police. The results have been mostly negative. On one hand, there has been an exacerbation of violence in the country, including many incidents in which violence was used disproportionately or illegally by state officials against civilians. On the other, the use of federal forces has undermined the federalist regime which serves as a check on the exercise of power by federal authorities, thus undermining state and local institutional capacities. The lessons from the Mexican case can be useful for other federal systems responding to organized crime.
Effects of Air-Impingement Jet Drying on Drying Kinetics, Nutrient Retention and Rehydration Characteristics of Onion (Allium cepa) Slices
Authors: Li Wenfeng , Wang Moyi , Xulin Xiao  , Zhang Baoshan , Yang Xingbin 
Published: February 2021

AbstractThis study is designed to investigate drying kinetics, nutrient retention and rehydration ratio of onion slices under air-impingement jet drying (AIJD) with different drying temperatures (40, 50 and 60°C), air velocities (11, 12 and 13 m/s), and the distance between jet nozzles and material box (0, 40 and 80 mm). Additionally, the influence of AIJD and hot air drying (HAD) on drying efficiency and product quality of onion slices was comparatively investigated. It was found that the moisture effective diffusivity of onion slices under AIJD ranged from 3.51 × 10−10to 5.51 × 10−10m2/s, and the activation energy (Ea) of onion determined from Arrhenius equation was 14.73 kJ/mol, and ascorbic acid content (AAC), total phenolic content (TPC) and DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging activity (DSA) significantly decreased in the dried onions compared to that in fresh onion. In addition, the results suggest that the Modified Page model provides the best fit for AIJD curves. Furthermore, AIJD product is better than HAD both in decreasing drying time and enhancing drying rate, AAC, TPC, DSA and rehydration ratio. Accordingly, the AIJD method has advantages in drying time and quality of products, indicating that this technology can be widely applied to food drying process.
Study on photocatalytic activity based on different pH values of AgBr/Ag2CO3 heterojunction
Authors: Li Fengfeng , Zhang Mingxi , Wang Jin , Cai Yongfeng , Zhao Dushao , Guo Mingyue , Wang Luyi , Shen Yi 
Published: February 2021

Abstract
In this work, we fabricate a highly efficient photocatalytic AgBr/Ag2CO3 heterojunction through the co-precipitation method. The obtained samples were characterized by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectra and X-ray photoelectron spectroscopy. The photocatalytic activities of obtained samples can be assessed by visible light (λ ≥ 400 nm) degradation of rhodamine B solution. X-ray diffraction revealed that the crystallinity of the AgBr/Ag2CO3heterojunction was significantly higher than pure AgBr and Ag2CO3. Moreover, the AgBr/ Ag2CO3 heterojunction prepared at pH = 6 has the best photocatalytic performance, it can raise the degradation degree of rhodamine B over 95% at 20 min. Finally, a possible photocatalytic mechanism is discussed.
Assessing knowledge of genomic concepts among Canadian nursing students and faculty
Authors: Dewell Sarah , Benzies Karen , Ginn Carla , Seneviratne Cydnee 
Published: February 2021

Abstract

Objectives
Contemporary nurses require genomic literacy to engage in genomics-informed health care. Little is known about the genomic literacy of undergraduate nursing students and faculty in many countries. Concept inventories can be used to assess levels of knowledge and inform curriculum development.

Methods
The 31-item Genomic Nursing Concept Inventory (GNCI) was administered to undergraduate nursing students (n=207) and faculty (n=13) in a school of nursing with two sites in western Canada.

Results
Scores on the GNCI were low and comparable to those of US students and faculty. Six student characteristics were associated with total score on the GNCI.

Conclusions
Both students and faculty need to increase their knowledge of genomics. Mandates from national nursing organizations and international collaboration are needed to develop and implement foundational genomics content for undergraduate curricula to enable graduates to engage in genomics-informed health care.
Dynamic Constitutive Behavior and Fracture of Lanthanum Metal Subjected to Impact Compression at Different Temperatures and Impact Tension
Authors: Wang Huanran , Cai Canyuan , Chen Danian , Ma Dongfang 
Published: February 2021

Abstract
Based on compressive tests, static on 810 material test system (MTS) and dynamic on the first compressive loading in split Hopkinson pressure bar (SHPB) tests at different strain rates and temperatures for Lanthanum (La) cylinder specimens, this study determined Johnson-Cook (J-C) type compressive constitutive equation of La metal. The determined compressive constitutive equation of La metal was calibrated in numerically simulating the recorded large deformations of La cylinder specimens generated by the multi-compressive loadings in SHPB tests. Based on tensile tests, static on MTS and dynamic on the first tensile loading in optimized tensile split Hopkinson bar (TSHB) tests at different strain rates for La sheet specimens, this study determined the J-C type tensile constitutive equation of La metal. It was found that the La sheet specimens were fractured during the first tensile loading in TSHB tests. The numerical simulations of transmitted and reflected pulses of TSHB tests for La sheet specimens using strain rate dependent failure strain criterion were consistent with the experimental data. The relation between dynamic failure strength and strain rates was discussed. From scanning electron microscope investigation of fractured La specimens, it was found that damage evolution patterns at high loading rates tend to become regular.
Multiscale Analysis of Particle Size-dependent Steady Compaction Waves in Granular Energetic Materials
Authors: Zhang Xin-Ming , Wu Yan-Qing , Huang Feng-Lei 
Published: February 2021

Abstract
A multiscale model is used to analyze the compaction processes in granular HMX beds composed of different particle sizes (coarse particles, d=40 μm and microfine particles, d=4 μm). The localization strategy of Gonthier is extended to include changes in thermal energy induced by compression. The variation in yield strength caused by solid-liquid phase change is also considered. Analysis of the steady-state wave structure indicates that the compaction behavior of a porous material is dependent on particle size. For solid volume fraction φs < 0.88, the fine particle beds provide greater resistance to compaction than the coarse particle beds, and they propagate compaction waves that travel at faster speeds. When φs > 0.88, the physical state of the compacted bed has become very similar for the two materials. For subsonic compaction waves, the evolution of the grain temperature shows that large particles lead to large hot spots and high temperature and coarse particles are more shock sensitive at low shock pressures. For supersonic compaction waves, compression induced changes in thermal energy play an important role in localization strategy. It increases the localization sphere center radius. The dissipated energy is deposited over a larger localization volume so that the grain temperature near the intergranular contact surface is reduced significantly. The localization center radius further increases because of the decrease in the yield strength caused by solid–liquid phase change. Consequently, the peak grain temperature is reduced further.
Numerical Analysis of Shockwave Propagation in Urban Underpass
Authors: Li Xin , Wang Zhihua , Wu Guiying 
Published: February 2021

Abstract
As an indispensable part of transportation system, urban underpass can alleviate traffic congestion and reduce traffic accidents effectively. In order to acquaint the hydrodynamics of shockwave in underpass and assess the potential damage and risk of bombing accidents, a numerical simulation was established to calculate the blast effects originating from the 13Kg TNT. Based on the location of detonation point, the shape of corridor section and the exit's cover, peak pressure distributions were predicted. The results indicate that the propagation of shockwave in horizontal direction switches to the inclined top of ground in a near-field due to the ground reflection and the set of exit's cover increases the risk of explosion to the structure and the users.
Promising approaches to catechesis in church communities: towards a research framework
Authors: de Kock A. (Jos) 
Published: February 2021

Abstract
The central focus of this article is to research how the modern religious and cultural landscape, in which our youth is growing up in, impacts the way catechetical practices in the various churches are organised and what type of catechetical learning environments seems to best fit the churches’ aim to be a community in this landscape. The author describes three educational models of catechetical learning environments and hypothesizes that the apprenticeship model is a promising catechetical model for church communities. The study concludes by presenting a practical theological research framework in which catechetical learning environments and learning processes may be empirically studied in such a way that ‘evidence’ may be gleaned for a particular hypotheses linking the relationship between the modern societal context, the church as a community and the religious identity development of today’s youth.
Ethische Predigt
Authors: Fritz Regina 
Published: February 2021

Zusammenfassung
Ethische Predigt ist zwar ein gängiges Phänomen kirchlicher Praxis, wird jedoch theoretisch selten reflektiert. Nach einem Blick auf einschlägige homiletische Veröffentlichungen stellt die Autorin mit der Ethik von Johannes Fischer ein Konzept vor, das ethische Predigt in ihrer Funktion beschreibbar macht. Demnach lässt sich zeigen, wie eine Kanzelrede, die Verstand und Intuitionen anspricht, sittliche Orientierung zu leisten vermag.
Auf dem Weg zu einer religionspädagogischen Ethnographie?
Authors: Riegger Manfred 
Published: February 2021

Abstract
This article demonstrates ethnography in religious education as a possible avenue for research in concrete situations of relevance to religious education. First, the empirical process is discussed, before one student’s statements regarding his father’s death are presented in a thick description. Finally, empirical and didactic-methodological perspectives of this approach are demonstrated.