Optical soliton in a one-dimensional array of a metal nanoparticle-microcavity complex (2021 Commun. Theor. Phys. 73 115105)

During the production process an error was introduced into equation (14). The absolute value symbol was moved to the wrong place. Here, we give the correct version of equation (14) ：

Corrigendum

Nawal Ferroudj, Hasan Koten, Sacia Kachi, Saadoun Boudebous "Prandtl Number Effects on the Entropy Generation During the Transient Mixed Convection in a Square Cavity Heated from Below", 65(4), pp. 310–325, 2021. (in this issue)https://doi.org/10.3311/PPme.17563When the above article was first published online Fig. 16 was incorrect. This has now been corrected in the online version. The correct version of Fig. 16 is published in this paper.

Corrigendum

László Lindenmaier, István Ferenc Lövétei, Gábor Lukács, Szilárd Aradi "Infrastructure Modeling and Optimization to Solve Real-time Railway Traffic Management Problems", 49(3), pp. 270–282, 2021. (in this issue)https://doi.org/10.3311/PPtr.18582When the above article was first published online some symbols in the text on pages 274–276, Table 7 on page 277, furthermore the subscript of the symbol bs in Eqs. (10), (11) and in the text on page 277 were incorrect. This has now been corrected in the online version. The correct version of some symbols in the text on pages 274–276, Table 7 on page 277, furthermore the subscript of the symbol bs in Eqs. (10), (11) and in the text on page 277 were published in this paper.

Corrigendum

Hanaa Elsherbiny, Mohamed Kamal Ahmed, Mahmoud A. Elwany "Comparative Evaluation for Torque Control Strategies of Interior Permanent Magnet Synchronous Motor for Electric Vehicles", 65(3), pp. 244–261, 2021. (in this issue)https://doi.org/10.3311/PPee.16672When the above article was first published online Fig. 13 was missing. This has now been corrected in the online version.The correct version of Fig. 13 is published here.

Corrigendum

Yazid Berkani, Nabil Taib "Dual Input Z-source Indirect Matrix Converter for Grid Connected Hybrid Renewable Energy Systems", 65(3), pp. 218–226, 2021. (in this issue)https://doi.org/10.3311/PPee.18031When the above article was first published online Fig. 12 was incorrect. This has now been corrected in the online version.The correct version of Fig. 12 is published here.

An Afrocentric Re-storying of Africa’s Struggle for Emancipation in Ngugi’s Selected Novels

The story of African liberation struggle has, over many years, been related in a colonial and neo-colonial manner by the imperial powers, with Africa delineated as a dark continent and Europe as a civilised one. This article, therefore, strives to disrupt this oppressive narrative by painting the correct version through Ngugi's A Grain of Wheat (1967) (AGW) and Matigari (1987). Kenya is used as a microcosm of the entire Africa in these novels. Furthermore, the study is a qualitative recounting of the African liberation struggle which is underpinned by Afrocentricity as an emancipatory theoretical strand. Purposive sampling, guided by exploratory research design, was employed to select the two texts by Ngugi because of their appositeness to the study. Narrative textual analysis was used to interpret the two novels as primary data. Ngugi conscientises Africans about their African liberation history in order for them to cultivate a true African identity (Biko,1978).

Note on Common Fixed Point Theorems in Convex Metric Spaces

In the present paper, we pointed out that there is a gap in the proof of the main result of Rouzkard et al. (The Bulletin of the Belgian Mathematical Society 2012). Then after, utilizing the concept of (E.A.) property in convex metric space, we obtained an alternative and correct version of this result. Finally, it is clarified that in the theory of common fixed point, the notion of (E.A.) property in the set up of convex metric space develops some new dimensions in comparison to the hypothesis that a range set of one map is contained in the range set of another map.

Corrigendum

Krisztina Várnai, László Petri, Lajos Nagy "Prospective Evaluation of Spent Sulfuric Acid Recovery by Process Simulation", 65(2), pp. 243–250, 2021. (in this issue)https://doi.org/10.3311/PPch.15679When the above article was first published online Fig. 8 was incorrect. This has now been corrected in the online version. The correct version of Fig. 8 is published here.

Erratum to: A new analysis of the MiniBooNE low-energy excess

After publication we discovered that some entries in table 2 and the corresponding contours in figures 3 and 4 have been misprinted. We provide here the correct version of table 2 and figures 3 and 4. The discussion and conclusions in the text of the paper remain unchanged.

Some new quantum Trapezoid and quantum Midpoint type inequalities for preinvex functions

In this article, we derive Hermite-Hadamard inequalities for preinvex functions using the quantum integrals and show their validation with mathematical examples. We prove midpoint and trapezoidal inequalities for q^{ϰ₂}-differentiable preinvex functions via q^{ϰ₂}-quantum integrals. Moreover, we show with an example that the already proved inequality of Hermite-Hadamard type for preinvex functions via q_{ϰ₁}-quantum integrals is not valid for preinvex functions and we give its correct version. We prove the midpoint inequalities for q_{ϰ₁}-differentiable preinvex functions via q_{ϰ₁}-quantum integrals. It is also shown that the newly proved results transformed into some known results by considering the limit q→1⁻ and η(ϰ₂,ϰ₁)=-η(ϰ₁,ϰ₂)=ϰ₂-ϰ₁ in the newly derived results.