AAMUSTED Knowledge Manager

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    Investigating The Effects Of Workers Fatigue On Quality Of Workmanship And Productivity In Ghana A Study Of Selected Project Sites In The Oti Region
    (2024-11) Phanuel Kwaku Drah
    The carrying out of most construction site operations involves the exertion of physical effort by construction site workers. The exertion of considerable physical effort coupled with long hours of work often lead to fatigue. Fatigue has deleterious effects on construction site workers’ physical and mental health. The aim of the study was to develop strategies for minimizing the effects of workers fatigue on the performance of construction site workers in Ghana. The specific objectives of the study include; to determine the main effects of workers’ fatigue on site workers working on building construction projects sites, to determine the extent of the effect of workers fatigue on the quality of workmanship, to assess the influence of workers fatigue on the work output on building construction project sites, and to develop strategies for minimizing the effects of workers fatigue on site workers on building construction project sites. The study adopted a cross sectional survey design and employed a quantitative strategy. The target population was construction site workers working on building construction project sites in the Oti Region. The study adopted purposive sampling technique. The findings of this study revealed that, poor social well-being, slowed reaction time, illnesses, distractions, and exhaustion are the main effects of fatigue. Also, the findings suggest that fatigue negatively affect time and quality performance as well as confidence level of site workers. The study found that fatigue exacerbated by poor environmental design has influence on the work output of site workers. The site workers in the study considered inadequate break for workers and physical and mental exertion as key factors influencing fatigue on building project sites. The study has outline measures for mitigating the effects of fatigue. The research work concluded that the effects workers fatigue consequently have negative effect on quality of workmanship and worker output in the construction sites.as weal site.
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    A Study On Exploring Critical Success Factors Of Stakeholder Management In Construction Projects In Cape Coast
    (2023-10) Mawuli Sallas
    Stakeholder’s management in construction projects depending on the environment, complication, and procurement method adopted; stakeholders are involved at different phases of the project undertaking different tasks and duties. These stakeholders with variable influence and power, play key roles in the success or failure of the project. Hence, construction projects are normally influenced by success elements that can help parties reach their envisioned goals with greater proficiency. The purpose of this study is to identify the various project stakeholders, examine the roles of project stakeholders, and also examine the impact of stakeholders on construction projects, and finally to determine the critical success factors of stakeholders’ management leading to construction project success in Cape Coast. Many critical success factors such as factors related to project manager ‘s performance, factors related to organization, factors related to the project, and factors related to the external environment which become obvious from this study would be useful to ascertain which factors impact on the success of projects. Stakeholder Management is therefore indispensable if project goals are to be achieved. The research develops on the existing performance area outlined to advance a contingency-based model for evaluating construction projects in Cape Coast. This research also focused on the key elements and best methods that lead to the success of the project in cape coast, the exploration of likely indicators for its evaluation, and the identification of the critical success factors. In an attempt to fill this research gap, a questionnaire survey was carried out in Cape Cost – of Ghana to gather the views of construction practitioners and clients concerning the relative significance of CSFs for stakeholder management. Findings from this report showed that all selected CSFs are regarded as critical by most respondents for the success of stakeholder management in construction projects. The factor concerning Effective Program Time Management is considered most essential for managing stakeholders, Project success criteria; project success factors; leading performance indicators; stakeholders; complexity critical success factors.
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    Effects of Aqueous Garlic Extract on the Reproductive Function and Hematology of Male Wistar Rats treated with Monosodium Glutamate.
    (OSEI, Nyarko Charles, 2023-08) OSEI, Nyarko Charles
    This study aimed to evaluate the effects of different doses of aqueous garlic extract on the reproductive function and hematology of male Wistar rats treated with monosodium glutamate. A total of 25 male Wistar rats, with an average body weight of 135 g, were randomly divided into 5 treatment groups, with 5 replicates per group. Treatment 1 (control) was administered normal saline. Treatment 2 was given 120 mg/kg BW of MSG. Treatment 3 was administered 120 mg/kg BW of MSG and 500 mg/kg BW of AGE. Treatment 4 was administered 120 mg/kg BW of MSG and 750 mg/kg BW of AGE. Treatment 5 was administered 120 mg/kg BW of MSG and 1000 mg/kg BW of AGE by oral gavage for 21 days. The study assessed the sperm count, motility, and morphology of epididymal sperm, white blood cells (WBC), granulocytes (GRA), red blood cells (RBC), haematocrit (HCT), mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), hemoglobin (HGB), lymphocytes (LYM), platelets (PLT), platelet large cell ratio (P-LCR) counts, reproductive organ’s weight, and testis histomorphometry at the end of the experiment. There was no significant difference in sperm count among the treatments (p > 0.05). Sperm motility increased in treatments 4 and 5 (p < 0.05). Immotile sperm were high in treatment 2. Treatments 3, 4, and 5 had a high level of normal sperm morphology. The weights of both the left and right testes were higher (p < 0.05) in treatment 5. Treatment 2 had decreased levels of WBC, RBC, and P-LCR in comparison to the control group. However, treatment 2 recorded increased levels of GRA. There were deformities in the seminiferous tubules of treatment 2, but they were considerable in treatments 3 and 4. Treatment 5 saw a reduction in the size of the seminiferous tubules. The research findings suggest that garlic has a dose dependent impact on mitigating the negative effects of MSG on the reproductive function and hematology of male Wister rats.
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    Effects of Two Levels of Dietary Fat and Fibre on the Growth, Haematology, Serum Biochemistry and Organ Histology in Male Albino Rats.
    (BOAKYE, Addo Michael, 2023-08) BOAKYE, Addo Michael
    The intake of high levels of saturated fat poses health risks in humans. However, intake of high levels of fibre, such as those in corn cob, might reduce these risks. Thus, the present study was conducted with the hypothesis that high fibre intake might reduce the risks posed to body weight (BW), haematology, serum biochemistry and organ health from the intake of high levels of saturated fat in Albino rats. Twenty-four (24) male Albino rats were randomly assigned to four treatments in a 2 × 2 factorial arrangement in a completely randomized design (CRD). The factors were dietary fat (low or high) and fibre (low or high). Data collected included feed intake, BW, organ weight (%), blood glucose, haematology, serum biochemistry and histology of the heart, liver and kidney. The results indicated that high fibre consistently reduced (P < 0.05) the BW of Albino rats throughout the study period (d 0 -56), while high fat reduced BW only on d 56. The MID count was higher in the group fed high fat (P < 0.05). In the group fed high fat, high fibre reduced PLT (P = 0.05) and PCT (P < 0.05) levels. In the group fed a high fat, high fibre increased (P < 0.05) TGA and VLDL. In the group fed low fibre, low fat reduced the LDL (P < 0.05), TGA (P = 0.05), and VLDL (P = 0.05). High fibre increased (P < 0.05), Total Bilirubin (P = 0.05. Dietary fat did not influence the liver function test after day 56 of the study. Low levels of dietary fat and fibre were ideal for organ health, however increasing the level of fibre improved health and mitigated some of the adverse effects imposed by dietary fat. Thus, the findings from this study indicate that increasing the level of fibre in the diet mitigated some of the adverse effects of taking in high levels of saturated fats in male Albino rats.
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    Assessing The Impact Of Electric Vehicle Charging On Low Voltage Distribution System Of Takoradi
    (2023-04) Richard Arthur
    This research assessed the impact that EV charging has on low voltage (LV) distribution systems at different penetration levels. The existing electric power distribution system of Takoradi, the Western Regional capital city of Ghana was modelled using the power analysis software Electrical Transient and Analysis Program (ETAP 19.0.1). Load flow analysis was then performed on the low voltage distribution system to further assess the total amount of EVs the distribution system can handle. EVs charging impacts on the current LV distribution system were assessed under three different scenarios; current state, minimum and maximum uptakes penetration levels of EVs. Two different EV charger models were employed to represent home charging (HC)-7.4 kW level-2 and fast charging (FC)-50 kW level-3. Voltage variations and transformer loading at twelve substations were meticulously noted in all simulations. The load flow simulation did not show any significant impact on the distribution system at the current state and minimum uptake penetration levels. However, at a maximum penetration level of 1.88% for HC and 1.11% for FC, under voltage conditions were observed at most of the buses with the condition deteriorating to the highest penetration level of 11.63% and 6.87% for HC and FC respectively where the system tend to fail. Domestic/ household loads significantly increased along with the increment of EV penetration levels over the years which contributed to total instability of Takoradi Distribution System (TDS). The impact that EV charging has on low voltage systems are expected to differ from one region to another, based on how many vehicles that are used in a locality, the current power demand, and the layout of the network. In effect, EV loads operating under different charging types have observable impacts on both the load and the voltage variables. The findings of this thesis will assist policy-makers take the appropriate actions needed to manage EV loads.