Steel Work Design and Analysis of a Manual Lawn Mower

Abstract: This work presented the design and construction of a manually powered lawn mower as well as the stress analysis of the blade. The solid model of the lawn mower design was done using Solid works software. The materials utilized for the construction were selected following standard material selection processes. The required cutting speed was achieved by proper gear arrangement which transferred the rational motion of the wheels to the blade, consequently increasing the speed by about 300%. The average cutting capacity of the lawn mower is 62.48 m2/hr. The stress analysis on the blade using the simulation tool of the solid works software gave a maximum von mises stress that is 252 times less than the yield strength of the blade material. Also, a maximum deformation of 0.00271mm obtained from the analysis is quite infinitesimal hence, the blade can withstand both stress and deformation resulting from the cutting operation. Keywords: grass, lawn mower, blade, cutting speed, cutting capacity. Title: Steel Work Design and Analysis of a Manual Lawn Mower Author: Okolie Paul C, Sylvester Emeka Abonyi, Okolie Uchenna Onyebuchi, Chikelue Edward Ochiagha International Journal of Novel Research in Electrical and Mechanical Engineering ISSN 2394-9678 Vol. 11, Issue 1, September 2023 - August 2024 Page No: 14-23 Novelty Journals Website: www.noveltyjournals.com Published Date: 22-September-2023 DOI: https://doi.org/10.5281/zenodo.8369633 Paper Download Link (Source) https://www.noveltyjournals.com/upload/paper/Steel%20Work%20Design%20and%20Analysis-22092023-4.pdfInternational Journal of Novel Research in Electrical and Mechanical Engineering, ISSN 2394-9678, Novelty Journals, Website: www.noveltyjournals.co

Productive Jobs Creation in Nigeria: How can Higher Education Institutions Involve Industry Experts into Direct Learning?

This study adopts qualitative research approach to learn how the Nigerian higher education (HE) institutions can involve industry experts to direct learning - an approach that can facilitate productive jobs creation in Nigeria. Higher education (HE) graduates are expected to have acquired the right skills through effective learning that prepares them for productive jobs creation. Previous studies reveal that majority of the Nigerian HE graduates are unemployable, unable to either start small businesses, become self-employed or paid employment due to poor skills development. As a result, a greater number of the HE graduates roam the streets in search for white-collar jobs which are not readily available

Tensile Behaviors of Al-Si-Mg Alloy Reinforced with Periwinkle Shell and Mangifera Indica Particulates

Abstract: Tensile behaviors of Al-12wt%-2wt%Mg based biocomposites containing different concentrations of periwinkle shell and Mangifera indica particulates (PSp and MIp) have been explored experimentally. The effects of hybrid concentrations on the tensile behaviors were also investigated. The structural analysis of the developed biocomposites was done using scanning electron microscopy (SEM). The biocomposites demonstrated excellent tensile behaviors at different concentrations of the reinforcements with maximum ultimate tensile strength of 233 MPa obtained by Al-12wt%-2wt%Mg-6PSp-2wt%MIp biocomposite. The biocomposite recorded higher strength than the alloy matrix. The improvements of mechanical properties are guaranteed by the distribution of PSp and MIp particles in the alloy matrix as evidenced in the microstructural analysis. Keywords: Aluminum Alloy, Periwinkle shell. Mangifera Indica Particulate, Tensile behaviors. Title: Tensile Behaviors of Al-Si-Mg Alloy Reinforced with Periwinkle Shell and Mangifera Indica Particulates Author: Chibuzo N. Okoye, Paul C. Okolie, Onyemazuwa A. Azaka, Chidume N. Nwambu International Journal of Novel Research in Civil Structural and Earth Sciences ISSN 2394-7357 Vol. 10, Issue 3, September 2023 - December 2023 Page No: 15-24 Novelty Journals Website: www.noveltyjournals.com Published Date: 22-September-2023 DOI: https://doi.org/10.5281/zenodo.8369549 Paper Download Link (Source) https://www.noveltyjournals.com/upload/paper/Tensile%20Behaviors%20of%20Al-Si-Mg%20Alloy-22092023-3.pdfInternational Journal of Novel Research in Civil Structural and Earth Sciences, ISSN 2394-7357, Novelty Journals, Website: www.noveltyjournals.co

Evaluation of the Fluid Loss Property of Annona muricata and Carica papaya

This technical paper evaluates the fluid loss property of Annona muricata and Carica papaya , prepared and measured as per API standard. This is a laboratory measurements carried out using low temperature and low pressure filter press. The prepared fluids were supplemented with 2 ppb XCD polymer product to enhance their carrying capacity. Their characteristics and commercial availabilities were also investigated. The 30 minutes filtrate volumes at 5 ppb, 10 ppb, 15 ppb and 20 ppb were obtained. The graph of concentrations versus the volume of the filtrate obtained was plotted. It was discovered that the concentration increases with decrease in volume of fluid loss and impermeable filtered mud cake was also obtained. Though, both gave good results, but the results of Annona muricata under the same conditions and concentrations were better than that of Carica papaya

FLOW ASSURANCE OPERATIONAL PROBLEMS IN NATURAL GAS PIPELINE TRANSPORTATION NETWORKS IN NIGERIA AND ITS MODELING USING OLGA AND PVTSIM SIMULATORS

The challenges associated with natural gas Pipeline flow assurance is an increasingly important issue as the world supply for natural gas expands, and is expected to rise more strongly to match the global demand for a cleaner energy. Flow assurance challenges in pipelines include hydrate formation, paraffin wax deposition, asphaltene deposition, sand deposits, black powder, and on the wall of pipelines, all of which obstruct the flow of well fluids and associated produced hydrocarbons. This study addressed these flow assurance concerns from a technical view by quantifying the threats and establishing appropriate mitigation schemes, leading to designed solutions and operational procedures. Modeling and simulation approach was adopted to achieve the overall aim. The simulation software tools PVTsim and OLGA were used for both steady state and dynamic states. The phase envelope investigation indicates that the cricondentherm within the constraint of the delivery temperature. The slugging analysis, indicates that hydrodynamic slugging will not be predominant for the pipeline operations at the design flow rate of 30MMscfd along Alakiri – Obigbo, and at 70MMscfd along the Obigbo Tie-in - Intermediate scrap station; as the flow regimes are mainly stratified for both pipeline systems. From the hydrate analysis investigated, after a shutdown period (no-touch time); hydrate threat is envisaged during the shutdown period of the Intermediate scraper trap – ALSCON along pipeline system, since the temperature drops to the hydrate formation temperature

Enhancing Graduate Employability: Why Higher Education Institutions have problems with teaching generic skills?

One debate among business owners and policymakers centres on whether higher education institutions (HEIs) have failed to transform the younger generation by developing their competencies, skills, values and behaviours to enable them to be fit for the world of work. While previous studies have considered the importance of skills development and its assessment in many contexts, there appears to have been limited scholarly research on employability issues within the higher education system (HES) in Nigeria. In seeking to address this, it is vital to understand how HEIs in Nigeria conceptualize generic skills and why HEIs have problems with teaching generic skills in their programmes. By adopting a qualitative approach, based on interviews with senior academics, industry executives and final-year undergraduates, this study found that many of the HEIs do not facilitate the teaching of high-level generic skills in their programmes. Some of the factors attributed to this include poor learning environment, lack of staff with industry experience, and over-dependence on theoretical content teaching. The findings are significant for reorienting the HE curriculum developers to align with the needs of the industry and society. Regarding implications for policy, we recommend that enterprise education be made mandatory for primary, secondary and tertiary education curriculum in Nigeria. Finally, we advocate more inclusive and interpretive research for greater understanding of the issues, and to offer useful data for policy-making and decision-making on the perspectives of preparing graduates for work

Evaluation of Nigerian Waxy Crude Oil Using Rheological Models

This paper evaluates Nigerian Waxy Crude Oil using Bingham Plastic model and Power Law model. Laboratory measurements on rheology were carried out on the sample as per API standard at temperatures of 30oC and 50oC. The obtained data of shear rate and shear stress were regressed and plotted. The Bingham Plastic model gave the values of yield stress and the regression coefficient as 0.673lbs/100ft2 and 0.9996 at the temperatures of 30oC; 0.622lbs/100ft2 and 0.9986 at the temperature of 50oC. Also, the Power Law model gave zero yield stress and regression coefficient of 0.9737 and 0.9884 at both temperatures. From the result, Nigerian Waxy Crude Oil is more adequately predicted by Bingham Plastic model because of the exhibition of Plastic behavior of a higher regression coefficien

The impact of the COVID-19 pandemic on self-harm and suicidal behaviour: a living systematic review

Background: The COVID-19 pandemic has caused widespread morbidity and mortality as well as disruption to people’s lives and livelihoods around the world; this has occurred as a result of both infection with the virus itself and the health protection measures taken to curb its spread. There are concerns that rates of suicide, suicidal behaviours and self-harm may rise during and in the aftermath of the pandemic. Given the likely rapidly expanding research evidence base on the pandemic’s impact on rates of suicide, suicidal behaviours and self-harm and emerging evidence about how best to mitigate such effects, it is important that the best available knowledge is made readily available to policymakers, public health specialists and clinicians as soon as is possible. To facilitate this, we plan to undertake a living systematic review focusing on suicide prevention in relation to COVID-19.Method: Regular automated searches will feed into a web-based screening system which will also host the data extraction form for included articles. Our eligibility criteria are wide and include aspects of incidence and prevalence of suicidal behaviour, effects of exposures and effects of interventions in relation to the COVID-19 pandemic, with minimal restrictions on the types of study design to be included. The outcomes assessed will be death by suicide; self-harm or attempted suicide (including hospital attendance and/or admission for these reasons); and suicidal thoughts/ideation. There will be no restriction on study type, except for single case reports. There will be no restriction on language of publication. The review will be updated at three-monthly intervals if a sufficient volume of new evidence justifies doing so.Conclusions: Our living review will provide a regular synthesis of the most up-to-date research evidence to guide public health and clinical policy to mitigate the impact of COVID-19 on suicide.Protocol registration: PROSPERO CRD42020183326 01/05/202

The impact of the COVID-19 pandemic on self-harm and suicidal behaviour: update of living systematic review

Background: The COVID-19 pandemic has caused considerable morbidity, mortality and disruption to people’s lives around the world. There are concerns that rates of suicide and suicidal behaviour may rise during and in its aftermath. Our living systematic review synthesises findings from emerging literature on incidence and prevalence of suicidal behaviour as well as suicide prevention efforts in relation to COVID-19, with this iteration synthesising relevant evidence up to 19th October 2020.Method: Automated daily searches feed into a web-based database with screening and data extraction functionalities. Eligibility criteria include incidence/prevalence of suicidal behaviour, exposure-outcome relationships and effects of interventions in relation to the COVID-19 pandemic. Outcomes of interest are suicide, self-harm or attempted suicide and suicidal thoughts. No restrictions are placed on language or study type, except for single-person case reports. We exclude one-off cross-sectional studies without either pre-pandemic measures or comparisons of COVID-19 positive vs. unaffected individuals.Results: Searches identified 6,226 articles. Seventy-eight articles met our inclusion criteria. We identified a further 64 relevant cross-sectional studies that did not meet our revised inclusion criteria. Thirty-four articles were not peer-reviewed (e.g. research letters, pre-prints). All articles were based on observational studies.There was no consistent evidence of a rise in suicide but many studies noted adverse economic effects were evolving. There was evidence of a rise in community distress, fall in hospital presentation for suicidal behaviour and early evidence of an increased frequency of suicidal thoughts in those who had become infected with COVID-19.Conclusions: Research evidence of the impact of COVID-19 on suicidal behaviour is accumulating rapidly. This living review provides a regular synthesis of the most up-to-date research evidence to guide public health and clinical policy to mitigate the impact of COVID-19 on suicide risk as the longer term impacts of the pandemic on suicide risk are researched