Violent Conflicts and Civil Strife in West Africa:Causes, Challenges and Prospects

The advent of intra-state conflicts or ‘new wars’ in West Africa has brought many of its economies to the brink of collapse, creating humanitarian casualties and concerns. For decades, countries such as Liberia, Sierra Leone, Côte d’Ivoire and Guinea- Bissau were crippled by conflicts and civil strife in which violence and incessant killings were prevalent. While violent conflicts are declining in the sub-region, recent insurgencies in the Sahel region affecting the West African countries of Mali, Niger and Mauritania and low intensity conflicts surging within notably stable countries such as Ghana, Nigeria and Senegal sends alarming signals of the possible re-surfacing of internal and regional violent conflicts. These conflicts are often hinged on several factors including poverty, human rights violations, bad governance and corruption, ethnic marginalization and small arms proliferation. Although many actors including the ECOWAS, civil society and international community have been making efforts, conflicts continue to persist in the sub-region and their resolution is often protracted. This paper posits that the poor understanding of the fundamental causes of West Africa’s violent conflicts and civil strife would likely cause the sub-region to continue experiencing and suffering the brunt of these violent wars

Structure and Electrical Properties of Carbon-Rich Polymer Derived Silicon Carbonitride (SiCN)

This article reports on the structure and electronic properties of carbon-rich polysilazane polymer-derived silicon carbonitride (C/SiCN) corresponding to pyrolysis temperatures between 1100 and 1600 degrees C in an argon atmosphere. Raman spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Hall measurements were used to support the structural and electronic properties characterization of the prepared C/SiCN nanocomposites. A structural analysis using Raman spectroscopy showed the evolution of sp(2) hybridized carbon phase that resulted from the growth in the lateral crystallite size (L-a), average continuous graphene length including tortuosity (L-eq) and inter-defects distance (L-D) with an increase in pyrolysis temperature. The prepared C/SiCN monoliths showed a record high room temperature (RT) electrical conductivity of 9.6 S/cm for the sample prepared at 1600 degrees C. The electronic properties of the nanocomposites determined using Hall measurement revealed an anomalous change in the predominant charge carriers from n-type in the samples pyrolyzed at 1100 degrees C to predominantly p-type in the samples prepared at 1400 and 1600 degrees C. According to this outcome, tailor-made carbon-rich SiCN polymer-derived ceramics could be developed to produce n-type and p-type semiconductors for development of the next generation of electronic systems for applications in extreme temperature environments