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Search Results: 1 - 10 of 353 matches for " Adegoke Sule Ajiboye "
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Measuring Process Effectiveness Using Cpm/Pert
AJIBOYE Sule Adegoke
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n6p286
Abstract: Most organizations around the world have discovered that the strategy of customer satisfaction translates very rapidly to higher profit and productivity. We show here how some simple Operations Research methods can be used to achieve better customer satisfaction. The methods of CPM and PERT were used to analyze a process that delivers service to customers in an organization faced with the problem of providing additional parking space for its customers’ trucks. By reducing and stabilizing the process cycle time, the problem was solved, saving the company the cost of leasing more parking lots for the customers’ trucks. In addition, the customers were happy with less time spent in the company’s premises.
On One-Step Method of Euler-Maruyama Type for Solution of Stochastic Differential Equations Using Varying Stepsizes  [PDF]
Sunday Jacob Kayode, Akeem Adebayo Ganiyu, Adegoke Sule Ajiboye
Open Access Library Journal (OALib Journal) , 2016, DOI: 10.4236/oalib.1102247
Abstract: In this work, a one-step method of Euler-Maruyama (EMM) type has been developed for the solution of general first order stochastic differential equations (SDEs) using Ito integral equation as basis tool. The effect of varying stepsizes on the numerical solution is also examined for the SDEs. Two problems of first order SDEs are solved. Absolute errors for the problems are obtained from which the mean absolute errors (MAEs) are calculated. Comparison of variation in stepsizes is achieved using the MAEs. The results show that the MAEs decrease as the stepsize decreases. The strong orders of convergence and the residuals for the problem for the theoretical are respectively obtained using Least Square Fit. This work produces numerical values for the solution to the problems which differ from the existing methods of EMM type in which results are always obtained by simulation.
A Multi-Stage Queue Approach to Solving Customer Congestion Problem in a Restaurant  [PDF]
Adegoke S. Ajiboye, Kayode A. Saminu
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.82019
Abstract: The multistage queue model was developed for a situation where parallel and unrelated queues exist at the first stage only. These queues merged into single queues at the remaining stages. The parallel queues offer services that are different from one another and customers arrive to join the queue that offer services that they need. The mathematical model was developed assuming an M/M/1 queue system and the measures of effectiveness were derived. The model was applied to solve the problem of customer congestion in a restaurant in the city of Ibadan, Nigeria that serves three different local delicacies. The three local delicacies constitute three different queues at the first stage. The second stage consists of only one queue which is for purchase of drinks and the third stage which is the last stage is for payment. Every customer in the restaurant passes through the three stages. Utilization factors for the five queues were determined and found to range from 70% to 97%. The average time spent by customers in the system was found to be 543.04 minutes. A simulation study using what-if scenario analysis was performed to determine the optimum service configuration for the system. The optimum configuration reduced average time for customers in the system from 543.04 minutes to 13.47 minutes without hiring new servers.
Absorption Studies of Arsenic Using Maghemite Crystals Synthesized from Iron Waste Extracted from Ogun State Iron Mill Dumpsite  [PDF]
John Adeola Adegoke, I. Adegoke Halimat
American Journal of Analytical Chemistry (AJAC) , 2016, DOI: 10.4236/ajac.2016.73027
Abstract: This paper outlines the synthesis of maghemite from raw iron waste obtained in an iron mill dumpsite around Ogun state, Nigeria. Magnetite was synthesized from the ferrous precursor obtained by digesting the iron waste with concentrated H2SO4. Transformation of magnetite to maghemite was done by heating the magnetite obtained in an oven at 200°C. To determine the absorption capacity of the synthesized maghemite sample, a stock solution of As(III) was used for the absorption. Absorption spectrum shows higher absorption of γ-Fe3O4 at higher concentration of As(III). Maximum absorption obtained is 14 mg/g. Estimated yield of γ-Fe3O4 was 32%; however a low, further study promises to improve the yield value. The study shows γ-Fe3O4 to be a good absorbent for heavy metals.
Effect of Heat Treatment Processes on the Mechanical Properties of Medium Carbon Steel  [PDF]
T. Senthilkumar, T. K. Ajiboye
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2012, DOI: 10.4236/jmmce.2012.112011
Abstract: The importance of various form of heat treatment operations on medium carbon steel in order to forester the problem that may arise in making a wrong choice of these steel materials or faulty heat treatment operations which may give rise to serious disruption in terms of human safety, higher cost and untimely failure of the machine components is of great concern. The mechanical properties such as ductility, toughness, strength, hardness and tensile strength can easily be modified by heat treating the medium carbon steel to suit a particular design purpose. Tensile specimens were produced from medium carbon steel and were subjected to various forms of heat treatment processes like annealing, normalizing, hardening and tempering. The stiffness, ductility, ultimate tensile strength, yield strength and hardness of the heat treated samples were observed from their stress-strain curve. The value of the yield strength (σy) was observed to be higher for the tempered specimen possibly as a result of the grain re-arrangement, followed by the hardened, normalized and annealed specimens. The value of the ultimate tensile strength (σu) were also observed to be in the order; hardened> tempered>normalized>annealed.
The Incidence and Association of Mental Depression with Symptomatic Lumbar Degenerative Disc Disease and Treatment Outcome  [PDF]
Lukman Olalekan Ajiboye, Muhammad Oboirien
Health (Health) , 2018, DOI: 10.4236/health.2018.1011114
Abstract: Study Design: Prospective analytical study. Objectives: The aim was to determine the association between mental depression and symptomatic Lumbar Degenerative Disc Disease (LDDD) in patients with no previous background of mental disorder. We also aimed at determining the incidence of mental depressions in patients with LDDD and the effects of the treatment on the mental depression. Methodology: One hundred and sixty patients with no prior history of mental or behavioral disorders who presented with low back pains arising from LDDD and met inclusion criteria were studied. The clinical findings and Depression Screening Test pro-forma were completed for each. The extracted information was analyzed using Statistical Package for Social Science (SPSS) version 24.0. The statistical significance was set at P < 0.05. Results: One hundred and fifty-three patients completed the study, with a male to female ratio of 1:1.5 and the mean age of the patients was 48.5 years. The marital status was 4.4% single, 86.9% married, 3.8% divorce/separate and 5% widow/widower. Their levels of education were: no formal education (10.00%), primary school level (8.10%), secondary level (27.50%) and Tertiary level (54.40%). Conclusions: This study showed the incidence of mental depression in 32% of the patients with LDDD. We also noted a statistically significant relationship between symptomatic LDDD and level of mental depression with significant improvement in the level of depression at 6th month after treatment. Hence, assessment of the patients’ mental health is important in the management of LDDD.
Reduction of Undercuts in Fillet Welded Joints Using Taguchi Optimization Method  [PDF]
Joseph Achebo, Sule Salisu
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2015, DOI: 10.4236/jmmce.2015.33020
Abstract: This project work focuses on the reduction of weld undercuts using the Taguchi method. The phenomenon of weld undercuts constitutes a major problem for the welding industry. When undercuts occur, and particularly when such cuts are deep, it has a negative impact on the weld as it lowers the integrity and quality of the weldment. Therefore, efforts are made globally to reduce the depth of such weld undercuts to the barest minimum. Several optimization methods have been adopted; however, in this study, the Taguchi method is applied. “The smaller the better components” of the Taguchi method is applied. From the results obtained from applying this Taguchi method, the optimum process parameters obtained are A2-B1-C2, which are a voltage of 20 V, a current of 180 A, and a welding speed of 130 mm/s, required to form an undercut of 0.03 mm. Whereas the existing process parameters used by the company are A1-B3-C, which make an undercut to a depth of 0.09 mm. It is concluded that the use of Taguchi method has been able to reduce the depth of undercut as shown in this study. A step-by-step approach is presented in the study.
A Non-PSLQ route to BBP-type formulas
Kunle Adegoke
Journal of Mathematics Research , 2010, DOI: 10.5539/jmr.v2n2p56
Abstract: Starting with two simple generators, we derive a wide range of general BBP-Type formulas in arbitrary bases. Many known BBP-Type formulas are seen to be particular cases of the formulas presented.
On generalized harmonic numbers, Tornheim double series and linear Euler sums
Kunle Adegoke
Mathematics , 2015,
Abstract: In this paper, direct links between generalized harmonic numbers, linear Euler sums and Tornheim double series are established in a more perspicuous manner than is found in existing literature. The high point of the paper is the discovery of certain combinations of Euler sums that are reducible to Riemann zeta values.
The Leadership Contribution towards Pleasure Member of Kelompok Tani in Malang Regency East Java  [PDF]
Ugik Romadi, ? Hamyana, Suryaman Sule
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612028
Abstract: This research specifically aims to know and analyze the value of direct contribution of leadership to the pleasure MEMBER OF KELOMPOK TANI in Malang Regency East Java Province. The method of this research is survey method. The location of the research was conducted on Kelompok Tani that was targeted by the UPSUS of Increasing Production of Paddy, Corn and Soybeans in 2017. Research Objects are Farmers who become group leaders and group members who are members of farmer groups who receive assistance UPSUS program to Increasing Production Rice, Corn and Soybean. The results showed that the direct effect of leadership variables on member satisfaction has a significance value greater than 0.05 (0.210), which means no significant effect. The results showed that the direct effect of leadership variables on member satisfaction has a significance value greater than 0.05 (0.210), which means no significant effect. While the standardized value of beta coefficient on t test shows that the magnitude of direct influence of leadership on member satisfaction is equal to 0.115 or rounded to 11%. That is, the high level of member satisfaction can only be influenced by the leadership of 11% while the rest (89%) influenced by other factors outside the model.
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