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Influence of Ageing on Selected Engineering Properties of Cassava [Manihot Esculenta (Crantz)] Roots
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GALERKIN APPROXIMATION OF A NONLINEAR PARABOLIC INTERFACE PROBLEM ON FINITE AND SPECTRAL ELEMENTS
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Page will reload when a filter is selected or excluded.- Oxidative stress 3 results 3
- The paper attempted to examine the reasons accounting for the sustenance of the practice of female circumcision and how to stem it. The basis of the facts presented here are derived from a survey involving a sample of four hundred and five respondents of both sexes conducted in two local government areas (Okpe and Sapele) of Delta state. The subjects that constituted the sample were randomly chosen and the data analysed through simple descriptive and inferential statistics. The results showed that the persistence of female circumcision is due to the application of western methods in the operation thereby reducing the agony and stress associated with the practice. It also identified the low level of education and urbanisation as factors inducing the sustainability of the practice because they make for the persistence of traditional norms and values. Consequent upon these findings, the paper concluded by suggesting the involvement and enlistment of western trained health care professionals as public health educator in an attempt to stamp out the act. In addition to the above, the paper suggested the rapid development of our educational system and urbanisation as a way of weakening non functional traditional values. 2 results 2
- "Psychological wellbeing, 1 results 1
- "The objective of this study is to investigate the influence of service situation on the mechanical properties of plain nails manufactured from low carbon steel. The influence of the degree of cold drawing on the mechanical properties and strain hardening of the material is investigated by tensile test experimentation. The stress-strain relationships of the cold-drawn low carbon steel were investigated over the 20, 25, 40 and 55% degree of drawn deformation for the manufacture of 4, 3, 2½ and 2 inches nails, respectively. The true stress-strain curves were analyzed to obtain the yield strength and tensile strength of the cold drawn steel. It is shown that the yield strength, tensile strength, hardness and toughness of the low carbon steel reduce with increasing degree of cold-drawn deformation. The micrographs of the deformed samples obtained using optical microscope shows that the grain structure elongates in the direction of the drawing operation and misorientation of the grains set in at 40 and 55% degree of deformation. The difference in yield strength was attributed to the strain hardening, resulting from the different degrees of drawn deformation." 1 results 1
- A study was undertaken to estimate the magnitude of dynamic stresses (MDS) induced in some mature tropical hardwood species during felling operation and their effect on the harvested wood. Five areas in Shasha forest reserve, Osun State, Nigeria were selected as the study sites because of the prevalent high. Two hundred and eighty nine trees represented by nine different species were studied. The species are Afzelia africana, Nauclea diderrichii, Terminalia superba, Khaya ivorensis, and Triplochiton scleroxylon Entandrophragma angolensis, Cordia milleniii, Mansonia altissima and Milicia excelsa. Using a checklist, information were collected on tree factors, terrain of the sites and experience of the operators. During felling of each tree, the duration of impact was estimated. Data collected were subjected to statistical analysis. The average content of the green wood ranged from 108% to 147% (dry basis) for all the species. The average impact force ranged from 1.498 X 106N to 7.588 X 106N, while the maximum dynamic stress ranged from 8.38 x 106 N/m2 for Triplochiton scleroxylon (Obeche) to 18.75 x 106N/m2 for Nauclea diderrichii (Opepe). The observed values of dynamic stress are very much higher than the ultimate static stress values for all the species and this will definitely affect the wood quality of the felled trees. 1 results 1
- Acetylation 1 results 1
- African locust bean, 1 results 1
- Aluminium alloy 1 results 1
- Assessment of the various types of hazard exposed to by logging crews in a Nigerian Forest Reserve was carried in this stud y . The study site was the Ondo State Afforestation Project (OGAP) South West Nigeria. Data collection involved the use of ergonomic checklist, participatory approach, on-the-spot assessment and oral interviews. Data collected were subjected to statistical analysis. The results showed that the commonest hazards exposed to by log felling crews were vibrations, noise, stress and mental workload. Accident rate during felling was very low as 10% of the workers claimed to have being involved in logging accidents during log loading recorded the highest frequency. All the crew members were exposed to a long duration (about 6hrs) of intense noise daily but only 30% could note the effect of noise on their health while 20% reported the effect of noise on their efficiency. None of the crew members has ever gone for audiometry test in the last five years. Fifty five percent of the worker were exposed to vibrations, of these, 30% are exposed to whole body vibration, 10% to hand-arm vibration while 15% were exposed to both hand-arm and whole body vibration. The affected workers reported on the negative effect of vibration on their health. A standard working time was observed, but slight variation still exist as break time were not being observed in the study area. Although there is provision of safety rule and protective gadgets, the workers were not using them as they claimed that it could affect their safety and efficiency. Workers carelessness, ignorance and lack of proper training and not adhering to the instruction manuals were some of the factors responsible for the high rate of hazard on the job. 1 results 1
- Background: Moringa oleifera is known to exhibit protection against oxidative damage due to its rich content of compounds with antioxidant activity. This study investigated the protective effect of the methanol extract of Moringa oleifera (MO) in a rat model of renal ischemia-reperfusion (IR) injury. Methods: Forty two wistar rats were randomly assigned to six groups of seven rats each, as follows: A, control group; B, sham-operated group; C, IR group; D, IR + low dose (200 mg/kg) MO; E, IR + high dose (400 mg/kg) MO and F, IR + Vitamin C (200 mg/kg). Unilateral ischaemia was induced by occluding the left renal artery for 45 minutes followed by rep erfusion up to 24 hours. Results: Moringa oleifera significantly (p<0.05) ameliorated IR-induced increases in malondialdehyde (MDA), protein carbon yls (PC) and advanced oxidation protein products (AOPP), while also decreasing serum BUN and Creatinine levels. Moreover, the low dose of MO caused reductions in renal NO and H2O2 levels, while increasing renal GPx and GST activities. Histopathology revealed marked improvement of tissue alterations induced by IR with both doses of MO. Conclusion: Overall, the methanol extract of M. oleifera effectively attenuated the deleterious effects of renal IR via alleviation of tissue oxidative stress. 1 results 1
- Background: Penile anomalies especially hypospadias are one of the most common genitourinary anomalies seen in newborns, and they pose a great deal of psychological stress to their mothers. This study examined our experience in the management of hypospadias. Patients: and Methods A retrospective study of all patients (Group A) managed for hypospadias from 2004 to 2013 was conducted. Data obtained included patients’ demography, their clinical presentation and management. These were analysed and compared with a similar study (Group B) conducted in this hospital four decades earlier between 1966 and 1977. Results: Forty-eight patients belonging to Group A had repair of hypospadias in comparison to the 42 patients in Group B. The mean age at presentation in Group A was 2.7 ± 4 years, and the anomaly was discovered at birth in all the patients. In contrary, Group B had 32 (76.2%) patients who presented immediately after birth and 10 (23.8%) patients who were either adolescents or adults (12-36 years) with a mean age of 18.9 years. Anterior hypospadias occurred more commonly in both groups; 10 (20.8%) patients were circumcised in Group A and 4 (9.5%) patients in Group B. Surgical site infection was the most common post-operative complication observed in both groups. The type of surgical repair was observed to have significantly influenced the outcome of surgical repair in patients in Group A (j2 = 14.13, P = 0.05). Conclusion: Proper and successful management of hypospadias can be enhanced in this environment with adequate media advocacy directed at prompt recognition of this anomaly and avoidance of circumcision when hypospadias has been identified. 1 results 1
- Boutique 1 results 1
- CMC 1 results 1
- Carboxymethylation 1 results 1
- Cassava root age 1 results 1
- Chlorpyrifos Diphenyl diselenide (DPDS) 1 results 1
- Circumcision 1 results 1
- Cold-Drawn 1 results 1
- Cold-drawing 1 results 1
- Deformation 1 results 1
- Delta State 1 results 1
- Drosophila melanogaster 1 results 1
- Dynamic stress, 1 results 1
- Epileptic power supply in Nigeria has caused hindrances to her growth. Electricity is required for technological advancement and economic growth, as business transactions and most activities depend on its availability. This work was aimed at developing a prototype hydropower plant for use in riverine area(s) for electricity generation. Using Autodesk inventor software, the required turbine was designed and thereafter fabricated and assembled appropriately with all necessary components. Stress analyses (Von Mises, first, and third principal stresses) were also conducted to determine the turbine load bearing capacity. The e system was fitted into the edge of a stream (with minimum debris and cataract to prevent and reduce the blades from wear and tear) and arranged such that the blades were at an appropriate angle of attack to capture the water's kinetic energy. The turbine possessed eight blades, designed and fabricated to function in a river with low volume. On assembling the turbine with frame, gears, ball bearing and shaft, a pico-hydropower plant was developed. Stress analyses indicated Von Mises; first; and third principal stresses to respectively be: (0.00000498617; -0.00316625; and -0.0259764) MPa for minimum values and (0.0382339; 0.0452009; and 0.00873272) MPa for maximum values, indicating that the turbine can withstand operating conditions like pressure, force and friction. On testing, voltage readings were 0.90, 0.93, 0.96, 0.98 and 1.00 volts respectively. It was found to be portable and economical. The locally developed hydropower plant will be useful for solving electrification problems in rural areas, farm settlements and off-grid homes. 1 results 1
- Exposure to chlorpyrifos (CPF) poses several harmful effects to human and animal health. The present study investigated the influence of diphenyl diselenide (DPDS) on CPF-induced toxicity in Drosophila melanogaster. Firstly, the cumulative responses of virgin flies (2- to 3-day-old) to CPF (0.075–0.6 µg/g) and DPDP (5–40 µmol/kg) in the diet for 28 consecutive days were investigated. Subsequently, the protective effect of DPDS (10, 20 and 40 µmol/kg) on CPF (0.15 µg/g)-induced mortality, locomotor deficits, neurotoxicity and oxidative stress was assessed in a co-exposure paradigm for 7 days. Results showed that CPF exposure significantly decreased the operant reflex in a time- and concentration-dependent manner, whereas the percent live flies with DPDS treatment was not statistically different from control following 28 days of treatment. In the co-exposure study, CPF significantly increased mortality while the survivors exhibited significant locomotor deficits with decreased acetylcholinesterase (AChE) activity. Dietary supplementation with DPDS was associated with marked decrease in mortality, improvement in locomotor activity and restoration of AChE activity in CPF-exposed flies. Moreover, CPF exposure significantly decreased catalase and glutathione-S-transferase activities, total thiol level with concomitant significant elevation in levels of reactive oxygen species and thiobarbituric acid reactive substances in the head and body regions of the treated flies. Dietary supplementation with DPDS significantly improved the antioxidant status and prevented CPF-induced oxidative stress, thus demonstrating the protective effect of DPDS in CPF-treated flies. 1 results 1
- Fatigue 1 results 1
- Female circumcision 1 results 1
- Filtration loss properties 1 results 1
- Finite element 1 results 1
- Global Transaction and Customer 1 results 1
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