The University of Guyana, in Georgetown, Guyana, is Guyana's national higher education institution. It was established in April 1963 with the following Mission: "To discover, generate, disseminate, and apply knowledge of the highest standard for the service of the community, the nation, and of all mankind within an atmosphere of academic freedom that allows for free and critical enquiry."The University of Guyana offers more than 60 under-graduate and graduate programmes, including in Natural Sciences, Engineering, Environmental Studies, Forestry, Urban Planning and Management, Tourism Studies, Education, Creative Arts, Economics, Law, Medicine, Optometry and Nursing. Several online programmes are available, as are extramural classes through the IDCE at four locations, in Georgetown and the towns of Anna Regina, Essequibo; Linden, Upper Demerara; and New Amsterdam, Berbice. The institution has a 2016 enrollment of some 8,000 students, and it has graduated more than 20,000 students, who have gone on to represent all professional careers locally, regionally and internationally. The university also is a major contributor to the public and private sectors and to the national economy of Guyana.
Coastal sedimentary systems are dynamic environments where morphological changes, sediment transport, and geochemical processes interact to shape coastal landscapes. This study presents a comprehensive investigation of morphosedimentary dynamics across four coastal sites in Guyana (Wellington Park, Mahaica, Abary and Mahaicony) through integrated analysis of over 100 sediment samples. The objectives of this study are to: characterise sediment properties across the four coastal sites; identify site-specific and depth-dependent patterns; determine relationships between sediment properties and depositional environments; assess contamination status and geochemical signatures; and interpret morphosedimentary dynamics in the context of coastal processes and environmental conditions. Multi-proxy data, including moisture content, 27 trace elements, grain size distributions, and loss on ignition were analysed using descriptive statistics, comparative analyses, correlation studies, and multivariate statistical techniques (Principal Component Analysis, hierarchical clustering, and K-means clustering). Results reveal three distinct sediment facies with contrasting depositional characteristics: (1) Abary and Mahaicony represent low-energy estuarine/tidal flat environments dominated by fine-grained sediments (82
Lanthanum Ferrite (LaFeO3) nanoparticles have received interest for their potential in energy storage and photocatalytic applications. LaFeO3 nanomaterial was prepared through a hydrothermal method, and its electrochemical, morphological, structural, and photocatalytic properties were investigated. Structural characterization confirmed that the orthorhombic perovskite structure of synthesized LaFeO3 material. The Electrochemical performance of LaFeO3 electrode materials was evaluated using a 3 M KOH electrolyte in a potential window of -0.3 to 0.4 V. The Cyclic voltammetry (CV) measurements were carried out at scan rates ranging from 10 to 50 mV s− 1, and specific capacitance values were calculated. Specific capacitance of LFO electrode material was found to be 89, 81, 73, 68, and 58 Fg− 1 for scan rates of 10, 20, 30, 40, and 50 mVs− 1, respectively, indicating excellent rate capability and efficient charge storage. Photocatalysis analysis revealed that the 84.2
As GenAI technologies become more pervasive in higher education (HE), scholars call for guidance on AI governance. To meet this need, a Delphi technique and collective writing was used in gathering expert perspectives from across 22 countries/locations and six continents. This resulted in the development of a HE GenAI policy/guidelines framework with eight core areas: (1) academic integrity, (2) ethical use and responsible use, (3) privacy and protection, (4) equitable access, (5) GenAI literacy, (6) integration strategy, (7) human oversight and accountability, and (8) institutional support and infrastructure. In addition, a six-part framework was developed to ensure that policies remain current and relevant: (1) creating a dedicated GenAI Committee, (2) conducting regularly scheduled policy reviews, (3) providing ongoing professional development and support, (4) communicating with all stakeholders, (5) evaluating the effectiveness and impact of GenAI, and 6) monitoring external developments. By providing a robust, eight-part framework for policy and guidelines, alongside a six-part mechanism for continued review, this study offers faculty, students, administrators, educational leaders, policymakers, and funders a responsible, adaptable, and consensus-driven blueprint for navigating the integration of GenAI in HE, ensuring that technological innovation serves pedagogical excellence.
The study describes the fabrication and thorough analysis of hybrid PCG (PVA/CS/GO) and PCPtG (PVA/CS/PtGO) nanocomposites produced using a simple solution-mixing method. Introducing graphene oxide (GO) and platinum-decorated graphene oxide (PtG) at concentrations ranging from 1 to 5 wt% into the PVA/CS matrix allows a detailed examination of how these fillers influence the structural and optical properties of the material. Further, the study uniquely correlates the nanofiller composition with micro-structural parameters-such as crystallite size, micro-strain, dislocation density, energy density, and Young's modulus-demonstrating a tuneable structure-property relationship. Optical analyses revealed a controlled reduction in the energy band gap, accompanied by an increase in Urbach energy, refractive index, optical dielectric constant, and optical conductivity, attributed to enhanced defect density and structural disorder with higher nanofiller loading. The optical dielectric behavior, evaluated as a function of frequency and filler content, showed that the PCPtG composites deliver a markedly stronger dielectric response than the PCG samples. This highlights the role of Platinum (Pt) in enhancing the interfacial polarization and facilitating more effective charge transport within the material. The Wemple-DiDomenico single-oscillator model and Spitzer-Fan relation were employed to extract refractive dispersion parameters, validating the observed optical transitions. Notably, the ratio of free charge carriers to effective mass (N/m*) exhibited a remarkable enhancement with PtG incorporation, suggesting improved charge carrier dynamics within the composite network. Field Emission Scanning Electron Microscopy along with EDAX analysis revealed well-distributed nanofillers and robust interfacial bonding within the polymer network. The Raman and FTIR spectra have also been studied examining the behaviours of molecules and presence functional groups. The novelty of this study lies in establishing a direct correlation between nanofiller functionality (GO vs. PtG) and the resulting optoelectronic performance of PVA/CS-based nanocomposites. Their improved structural stability and adjustable optical responses make these hybrid materials strong contenders for next-generation optoelectronic technologies.
This study investigates the transverse momentum (p(T)) distributions of pi(-/+),K--/+ , p( p),K-s(0) , and Lambda in various centrality classes of Pb-Pb collisions at root(NN)-N-s =2.76 TeV. The experimental spectra were analyzed using the Tsallis non-extensive distribution, from which the effective temperature (T), non-extensive parameter (q), and mean transverse momentum ( < p(T) >) were extracted for each particle species and centrality bin. To disentangle thermal and collective effects, the mean kinetic freeze-out temperature (< T-0 > ) was obtained from the intercept of the T versus mass relation, and the average transverse flow velocity () was extracted from the slope of < p(T) > versus mean moving mass for pions, kaons, and protons. The results show that T increases and q decreases with centrality, indicating a hotter and more equilibrated system in central collisions. A clear mass dependence of T supports the presence of a multi-freeze-out scenario, with heavier particles decoupling earlier. Both < T-0 > and arise from peripheral to mid-central collisions before saturating toward central events, which may suggest the onset of collective behavior or changes in freeze-out dynamics. These observations provide new insights into the thermal and dynamical properties of the medium created in heavy-ion collisions at the LHC.
