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Godwin Amechi Okeke,Jong Kyu Kim 경남대학교 수학교육과 2020 Nonlinear Functional Analysis and Applications Vol.25 No.3
We approximate the common fixed point of two nonself operators satisfying rational contractive conditions via Jungck-type iterative schemes in complex valued Banach spaces. Moreover, we prove that the Jungck-CR iterative sequence is (S,T)-stable and give some numerical examples to validate our analytical results. Furthermore, we apply our results in solving certain mixed type Volterra-Fredholm functional nonlinear integral equation.
ASPECTS OF KISWAHILI LANGUAGE IN MOYEZ VASSANJI’S FICTION
Godwin Siundu 한국외국어대학교 아프리카연구소 2020 Asian Journal of African Studies Vol.- No.48
This article problematizes the use of aspects of Kiswahili language in selected works of MG Vassanji, the most canonized East African writer of South Asian ancestry. The article begins by acknowledging two critical points regarding the use of Kiswahili in literatures by South Asian writers in the region: first, the place of the language in the region’s post-independence cultural politics of identities and, second, the practical question of audiences that a language enables or limits. The article suggests that a balance between these considerations explains why, for instance, while some South Asian writers in the region at some point wrote full length works in Kiswahili, this ‘experiment’ would later give way the English language as the predominant language of literary expression. At the same time, although the literary oeuvre of Vassanji and South Asian writers in the region has attracted varying critical responses from the region and beyond, such criticism has tended to focus on ‘bigger’ postcolonial concerns with the politics of racial affirmation and experiences of marginality. But the role of Kiswahili and its cultures in constituting these concerns remain either presumed or overlooked. Yet, the sense of marginality and otherness - with their socio-economic implications - that Vassanji recreates and critics theorise could have been impossible but for the predominant use of Kiswahili language in East Africa’s socio-political discourses. For instance, it was through Kiswahili language and its attendant cultures that post-independence attempts at rallying pan-Africanist based patriotism were inaugurated by the likes of Julius Nyerere and Jomo Kenyatta, the founding presidents of Tanzania and Kenya, respectively. Against this background, the current article interrogates how Vassanji navigates the possibilities and limits of Kiswahili language and the cultures it engenders to interpret South Asian worlds in East Africa.
Correlation between the Microstructure and Mechanical Properties of W-Bearing Ti-6Al-4V Alloys
Godwin Kwame Ahiale,계인석,권영삼,오용준 대한금속·재료학회 2021 대한금속·재료학회지 Vol.59 No.6
W-containing Ti-6Al-4V alloys (W=0, 1, and 5 wt%) were fabricated by the powder injection molding process, and the corresponding effects of tungsten content on the mechanical properties and microstructure of the alloys were investigated. The alloy powders were sintered at 1200 °C and then hot-isostatically-pressed at 900 °C. The fabricated alloys were subjected to microstructural and chemical analyses, and tensile and nano-indentation tests. The yield strength and tensile strength proportionally increased as the W content was increased from 0 wt% to 5 wt%. Ductility was not affected by the addition of up to 5 wt% W due to its complete dissolution in the matrix. Higher W addition induced finer α/β lamellar microstructures and increased the β to α phase ratio. Moreover, the added W dissolved preferentially in the β phase by solid solution hardening, increasing the hardness of the β phase, which originally was significantly softer than the α phase. For the alloys containing up to 5 wt% W, the strengthening without ductility loss was attributed to the finer α/β lamellae and the volume increase in the β phase hardened by W. These results suggest that adding W to Ti-6Al-4V alloy is a promising method for developing Ti alloys with both high strength and toughness.
FIXED POINT THEOREMS FOR CONVEX MINIMIZATION PROBLEMS IN COMPLEX VALUED CAT(0) SPACES
Godwin Amechi Okeke,Mujahid Abbas,Manuel de la Sen 경남대학교 수학교육과 2020 Nonlinear Functional Analysis and Applications Vol.25 No.4
In this paper, we introduce the concept of a complex valued CAT(0) space andpropose a new proximal point algorithm for certain nonlinear operators satisfying rationalexpressions in the framework of complex valued CAT(0) spaces. We prove existence of fixed point of these nonlinear mappings in such spaces. And we prove strong and -convergence of the iterative sequence generated through our proposed algorithm to the minimizer of aconvex function and the xed point of these mappings. We show that the new iterative algorithm converges faster than the modified Mann-type and Ishikawa-type proximal point algorithms.
Godwin O. Akaba,Ubong I. Anyang,Bissallah A. Ekele 대한고혈압학회 2022 Clinical Hypertension Vol.28 No.1
Preeclampsia/eclampsia (PE/E) contributes significantly to maternal, perinatal morbidity and mortality in Nigeria. The objectives of the study were to ascertain the prevalence, materno-fetal outcomes and sociodemographic factors associated with PE/E at Nigerian Teaching Hospital from September 2014 to August 2019. This was a retrospective cross-sectional study that analyzed deidentified secondary data of women managed for PE/E at a teaching hospital in north-central, Nigeria. Descriptive statistics were used to determine sample characteristics and study outcome estimates. Bivariate analysis was used to test for associations between sociodemographic factors and PE/E, materno-fetal outcomes while logistic regression analysis was used to test for the magnitude of these associations. The significance level was set at P < 0.05. The prevalence of PE/E in this study was 3.60%. Preeclampsia was diagnosed in 3.02% of cases while eclampsia was the diagnosis in 0.58%. Case fatality rate was 3.9% and still birth rate was 10.7%. Majority of women (85.4%) did not have any maternal complication nor unfavorable outcome. Majority (67.7%), of babies weighed less than 2500 g and birth weight was the only sociodemographic factor that was significantly associated with fetal outcome (X 2 = 15.6, P < 0.001). The prevalence of PE/E in this study is high and is associated with high maternal and perinatal deaths. Majority of the cases of PE/E as well the fatalities occurred in women who had no formal education, unbooked and referred to the teaching hospital with worsening conditions. There is need for explorative research on community factors associated with PE/E and its outcome towards prevention and early management of cases.
Image Re-branding in a Fragile State: The Case of Nigeria
Godwin Uyi Ojo,Iro Aghedo 서울대학교행정대학원 2013 Journal of Policy Studies Vol.28 No.2
In today’s globalized world, nations are increasingly concerned about how they are perceived by their publics, often carefully planning and executing policies to maintain a positive identity or shed a negative image. While some countries are able to execute nation branding, others are not. Using the Nigerian experience as a case study, this article shows how the character of a state can undermine its capacity for successful nation branding. We argue that countries are judged not just by what they say but also by what they do, and that inherent contradictions such as sectarian violence, ethnic tension, and corruption underline Nigeria’s underdevelopment and its reputation at home and abroad. We assess this trajectory in the context of state fragility and “prebendalization” politics in a country with a powerful colonial legacy, and suggest a duality of order and disorder involving formal and informal structures of governance that impinge significantly on re-branding efforts.