International Journal of Academic Research and Innovation (IJARI)
ISSN:2545-5214
https://ijari.
2023
I. B. S. Sadiku, Aina; Ganiyu, A. K
ASSESSMENT OF COMBINED MACHINE LEARNING MODELS ON SALE PREDICTION Journal Article
In: International Journal of Academic Research and Innovation, vol. 3, iss. 1, pp. 7 - 10, 2023, ISSN: 2545–5214.
@article{IJARI2301002,
title = {ASSESSMENT OF COMBINED MACHINE LEARNING MODELS ON SALE PREDICTION},
author = { Sadiku, I. B. S., Aina, O.A., Onalaja, O.O and Ganiyu, A.K},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2023/08/IJARI-23-01-002.pdf},
issn = {2545–5214},
year = {2023},
date = {2023-01-02},
journal = {International Journal of Academic Research and Innovation},
volume = {3},
issue = {1},
pages = {7 - 10},
abstract = {Machine learning models are combined to output a better skillful model. The output model(s) to use or trust to solve a problem is subject to its record of performances. In this study, ensemble machine learning algorithm is used in anaconda3 environment to combine the predictions from multiple machine learning classification models: K-Nearest Neighbors (KNN), Support Vector Machine Enabled Radial Basis Function (SVM-RBF), Decision Trees (DT), Random forest (RF), Multilayer perceptron (MLP) on sale dataset. The dataset consist of three levels of sale channels (In-person, Instagram and Whatsapp) and three levels of movement restriction period (COVID- 19, nationwide restriction due to national election and no restriction movement). The results revealed that KNN, SVM-RBF, DT, RF, MLP, and the combined model had: accuracy score of 62.99 %, 91.57 %, 52.45 %, 89.93 %, 33.02 % and 49.41 % respectively; the Matthews correlation coefficient (MCC) gave 50.84 %, 88.85 %, 34.76 %, 86.61 %, 6.12 % and 29.95 % respectively; F1 score also gave 59.92 %, 91.24 %, 44.83 %, 89.58 %, 19.58 % and 43.59 % respectively. It can be seen from the results that combining models for machine learning operation does not necessarily give higher performances in all score category but the confidence in individual model to accurately learn on the dataset or from neighbor model on its own.
Keywords: Skillful, Algorithm, Anaconda3, Sale Channels, Movement Restriction Period},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Machine learning models are combined to output a better skillful model. The output model(s) to use or trust to solve a problem is subject to its record of performances. In this study, ensemble machine learning algorithm is used in anaconda3 environment to combine the predictions from multiple machine learning classification models: K-Nearest Neighbors (KNN), Support Vector Machine Enabled Radial Basis Function (SVM-RBF), Decision Trees (DT), Random forest (RF), Multilayer perceptron (MLP) on sale dataset. The dataset consist of three levels of sale channels (In-person, Instagram and Whatsapp) and three levels of movement restriction period (COVID- 19, nationwide restriction due to national election and no restriction movement). The results revealed that KNN, SVM-RBF, DT, RF, MLP, and the combined model had: accuracy score of 62.99 %, 91.57 %, 52.45 %, 89.93 %, 33.02 % and 49.41 % respectively; the Matthews correlation coefficient (MCC) gave 50.84 %, 88.85 %, 34.76 %, 86.61 %, 6.12 % and 29.95 % respectively; F1 score also gave 59.92 %, 91.24 %, 44.83 %, 89.58 %, 19.58 % and 43.59 % respectively. It can be seen from the results that combining models for machine learning operation does not necessarily give higher performances in all score category but the confidence in individual model to accurately learn on the dataset or from neighbor model on its own.
Keywords: Skillful, Algorithm, Anaconda3, Sale Channels, Movement Restriction Period
Keywords: Skillful, Algorithm, Anaconda3, Sale Channels, Movement Restriction Period
2022
AFOLAYAN, Andrew Olumide
ASSESSMENT OF THE STATUS OF RADIOTHERAPY SERVICES IN NIGERIA: AN INTERVENTION TO IMPROVE THE SITUATION Journal Article
In: International Journal of Academic Research and Innovation, vol. 2, iss. 2, pp. 30 - 34, 2022, ISSN: 2545–5214.
@article{IJARI2202005,
title = {ASSESSMENT OF THE STATUS OF RADIOTHERAPY SERVICES IN NIGERIA: AN INTERVENTION TO IMPROVE THE SITUATION},
author = {Andrew Olumide AFOLAYAN},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2023/08/IJARI-22-02-005.pdf},
issn = {2545–5214},
year = {2022},
date = {2022-12-01},
urldate = {2022-12-01},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
issue = {2},
pages = {30 - 34},
abstract = {As an important component of cancer control programs, the scarcity of radiation therapy resources in Nigeria is becoming more severe as cancer incidence increases. This study analyses and suggests possible solutions to the causes of this rather disastrous state of radiation therapy in Nigeria. In the study the available radiotherapy centers in Nigeria were analyzed, while relevant information about the types and number of radiotherapy equipments was obtained using retrospective method of data collection. Results showed that between 2001and 2014 the number of megavoltage therapy machines has reached nine from five, with at least one therapy machine situated in nine of the radiotherapy center. Nigeria is the most populated African country with a population of at least 160 million people based on 2006 population census and average annual growth rate of 3.10%, giving only a marginal improvement in the radiotherapy service. The results also showed that these facilities are concentrated in the southern and northern states of the country. Although progress has been made in the establishment of radiation therapy services in Nigeria, a large need still exists for training of manpower in all fields of specialization related to radiotherapy service in order to adequately care for the multitude of cancer patients. Radiotherapy centers need to be established in Nigeria, due to the increasing number of patients requiring the facility. Awareness of such centers should be raised among medical practitioners and the populace.
Keywords: Radiotherapy, Cancer, Megavoltage Therapy Machine, Linear Accelerator.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
As an important component of cancer control programs, the scarcity of radiation therapy resources in Nigeria is becoming more severe as cancer incidence increases. This study analyses and suggests possible solutions to the causes of this rather disastrous state of radiation therapy in Nigeria. In the study the available radiotherapy centers in Nigeria were analyzed, while relevant information about the types and number of radiotherapy equipments was obtained using retrospective method of data collection. Results showed that between 2001and 2014 the number of megavoltage therapy machines has reached nine from five, with at least one therapy machine situated in nine of the radiotherapy center. Nigeria is the most populated African country with a population of at least 160 million people based on 2006 population census and average annual growth rate of 3.10%, giving only a marginal improvement in the radiotherapy service. The results also showed that these facilities are concentrated in the southern and northern states of the country. Although progress has been made in the establishment of radiation therapy services in Nigeria, a large need still exists for training of manpower in all fields of specialization related to radiotherapy service in order to adequately care for the multitude of cancer patients. Radiotherapy centers need to be established in Nigeria, due to the increasing number of patients requiring the facility. Awareness of such centers should be raised among medical practitioners and the populace.
Keywords: Radiotherapy, Cancer, Megavoltage Therapy Machine, Linear Accelerator.
Keywords: Radiotherapy, Cancer, Megavoltage Therapy Machine, Linear Accelerator.
Fagbayide Samuel D. Amori Anthony A., Akintade Joshua A.; A., Okusanya Muyiwa
IMPROVING WATER USE EFFICIENCY IN PEPPER (CAPSICUM ANNUUM L.) PRODUCTION UNDER DRIP IRRIGATION IN ILARO, OGUN STATE, NIGERIA Journal Article
In: International Journal of Academic Research and Innovation, vol. 2, no. 2, pp. 21 - 29, 2022, ISSN: 2545 – 5214.
@article{IJARI-22-02-004,
title = {IMPROVING WATER USE EFFICIENCY IN PEPPER (CAPSICUM ANNUUM L.) PRODUCTION UNDER DRIP IRRIGATION IN ILARO, OGUN STATE, NIGERIA},
author = { Amori Anthony A., Fagbayide Samuel D., Akintade Joshua A. and Okusanya Muyiwa A.},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2022/04/IJARI-22-02-004.pdf},
issn = {2545 – 5214},
year = {2022},
date = {2022-03-29},
urldate = {2022-03-28},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
number = {2},
pages = {21 - 29},
abstract = {Irrigation scheduling is pivotal for precision and sustainable farming, optimum crop growth and yield, as well as water use efficiency (WUE), especially in water-limited areas. The study aims to determine water use efficiency, as well as the effect of water stress on the yield of pepper under drip irrigation system. The study was conducted at the Agricultural and Bio-environmental Engineering Research Farm of the Federal Polytechnic Ilaro, Ogun State, Nigeria. Four irrigation treatments were investigated. The experiment had four irrigation levels. The first irrigation application treatment (A) consists of 100% of actual crop evapotranspiration (ET). The second (B) was 75% ET. The third (C) was 50% ET and fourth (D) consist of 25% ET. The experiment was arranged in a randomized complete block design (RCBD) with four replications and 2 varieties of pepper: Capsicum annum and Capsicum frutescens. Irrigation applications were applied for 3 weeks after transplanting and thereafter continued for the whole growing season. Parameters such as such soil, agronomic and crop’s consumption water use were measured and the results subjected to statistical analysis. The results indicated that there was a significant difference between the WUE, yields and growth parameters under different levels of irrigation in the two pepper varieties. The results showed that water use efficiency, yields and other agronomic parameters such as plant height, number of leaves and fruit length and weight were higher during the studies periods for both pepper varieties under treatments A and B compared with other treatments C and D respectively. However, there was no significant difference in WUE of treatments A and B. Statistical analysis among the agronomic parameters showed a significant difference (p<0.05) in all the treatments. It was concluded that irrigating at 75% ET in the study area will result in water saving and maximum sustainable production of these pepper varieties.
Keywords: Drip, Irrigation, Pepper, Production, Water, Efficiency, Sustainable},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Irrigation scheduling is pivotal for precision and sustainable farming, optimum crop growth and yield, as well as water use efficiency (WUE), especially in water-limited areas. The study aims to determine water use efficiency, as well as the effect of water stress on the yield of pepper under drip irrigation system. The study was conducted at the Agricultural and Bio-environmental Engineering Research Farm of the Federal Polytechnic Ilaro, Ogun State, Nigeria. Four irrigation treatments were investigated. The experiment had four irrigation levels. The first irrigation application treatment (A) consists of 100% of actual crop evapotranspiration (ET). The second (B) was 75% ET. The third (C) was 50% ET and fourth (D) consist of 25% ET. The experiment was arranged in a randomized complete block design (RCBD) with four replications and 2 varieties of pepper: Capsicum annum and Capsicum frutescens. Irrigation applications were applied for 3 weeks after transplanting and thereafter continued for the whole growing season. Parameters such as such soil, agronomic and crop’s consumption water use were measured and the results subjected to statistical analysis. The results indicated that there was a significant difference between the WUE, yields and growth parameters under different levels of irrigation in the two pepper varieties. The results showed that water use efficiency, yields and other agronomic parameters such as plant height, number of leaves and fruit length and weight were higher during the studies periods for both pepper varieties under treatments A and B compared with other treatments C and D respectively. However, there was no significant difference in WUE of treatments A and B. Statistical analysis among the agronomic parameters showed a significant difference (p<0.05) in all the treatments. It was concluded that irrigating at 75% ET in the study area will result in water saving and maximum sustainable production of these pepper varieties.
Keywords: Drip, Irrigation, Pepper, Production, Water, Efficiency, Sustainable
Keywords: Drip, Irrigation, Pepper, Production, Water, Efficiency, Sustainable
Musari, Adedayo Akeem; Adebanjo, Oludotun Adewale
APPRAISAL OF CONSUMER LOYALTY TO BRANDED MALT DRINKS IN LAGOS STATE, NIGERIA Journal Article
In: International Journal of Academic Research and Innovation, vol. 2, no. 2, pp. 1 - 5, 2022, ISSN: 2545–5214.
@article{IJARI-22-02-001,
title = {APPRAISAL OF CONSUMER LOYALTY TO BRANDED MALT DRINKS IN LAGOS STATE, NIGERIA},
author = {Musari, Adedayo Akeem and Adebanjo, Oludotun Adewale},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2022/03/IJARI-22-02-001.pdf},
issn = {2545–5214},
year = {2022},
date = {2022-03-15},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
number = {2},
pages = {1 - 5},
abstract = {This study was carried out among consumers of branded malt drinks in Lagos State, to establish the existence or otherwise of brand loyalty among such consumers. The study made use of primary and secondary sources of data. The major instrument used for primary data collection was the questionnaire while secondary data came from journals, books, newspapers, magazines, etc. As for data presentation; tables were used while the Chi-Square was used for data analysis. The study revealed that the five most preferred brands of malt drinks in Lagos State are Dubic Malt, Malta Guinness, Maltina, Amstel Malta and Beta Malt, in that order. The study also showed that the most influential factors in consumers’ decision to stick to their preferred brands are the perceived high brand quality and advertising. The study equally revealed that most of the consumers of branded malt drinks in Lagos State would not want to buy any other brand of malt drink even in the absence of their preferred brand. Based on the results of the study, it is very clear that brand loyalty exists among consumers of branded malt drinks in Lagos State.
Keywords: Brand, Promotion, Consumers, Advertising, Brand loyalty},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study was carried out among consumers of branded malt drinks in Lagos State, to establish the existence or otherwise of brand loyalty among such consumers. The study made use of primary and secondary sources of data. The major instrument used for primary data collection was the questionnaire while secondary data came from journals, books, newspapers, magazines, etc. As for data presentation; tables were used while the Chi-Square was used for data analysis. The study revealed that the five most preferred brands of malt drinks in Lagos State are Dubic Malt, Malta Guinness, Maltina, Amstel Malta and Beta Malt, in that order. The study also showed that the most influential factors in consumers’ decision to stick to their preferred brands are the perceived high brand quality and advertising. The study equally revealed that most of the consumers of branded malt drinks in Lagos State would not want to buy any other brand of malt drink even in the absence of their preferred brand. Based on the results of the study, it is very clear that brand loyalty exists among consumers of branded malt drinks in Lagos State.
Keywords: Brand, Promotion, Consumers, Advertising, Brand loyalty
Keywords: Brand, Promotion, Consumers, Advertising, Brand loyalty
Osinaike, Funmilola Omolara
VARIANTS AND ERRORS IN NIGERIAN ENGLISH Journal Article
In: International Journal of Academic Research and Innovation, vol. 2, no. 1, pp. 26 - 30, 2022, ISSN: 2545–5214.
@article{IJARI-22-004,
title = {VARIANTS AND ERRORS IN NIGERIAN ENGLISH},
author = {Osinaike, Funmilola Omolara},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2022/02/IJARI-22-01-004.pdf},
issn = {2545–5214},
year = {2022},
date = {2022-02-25},
urldate = {2022-02-25},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
number = {1},
pages = {26 - 30},
abstract = {This paper discussed the varieties of the English Language in Nigeria. A brief history of English, the evolution of language in Nigeria and different classifications by scholars were discussed. The paper concluded with the future of Nigerian English and suggested recommendations on the variety to be picked as the standard for Nigerian English.
Key Words: English, Language, Variants, Errors, Nigerian},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This paper discussed the varieties of the English Language in Nigeria. A brief history of English, the evolution of language in Nigeria and different classifications by scholars were discussed. The paper concluded with the future of Nigerian English and suggested recommendations on the variety to be picked as the standard for Nigerian English.
Key Words: English, Language, Variants, Errors, Nigerian
Key Words: English, Language, Variants, Errors, Nigerian
ELEYOWO, Israel Olusegun; IBIKUNLE, Olajide
In: International Journal of Academic Research and Innovation, vol. 2, no. 1, pp. 1-7, 2022, ISSN: 2545 – 5214.
@article{IJARI-22-001,
title = {THE IMPACT OF PEER-PRESSURE AND PERSUASION ON THE ACCEPTANCE OF ADIRE FABRICS (CLOTHES) IN WESTERN NIGERIA (A STUDY OF YOUNG ADULTS IN IKORODU, LAGOS STATE, NIGERIA)},
author = {Israel Olusegun ELEYOWO and Olajide IBIKUNLE},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2022/02/IJARI-22-01-001.pdf},
issn = {2545 – 5214},
year = {2022},
date = {2022-02-22},
urldate = {2022-02-22},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
number = {1},
pages = {1-7},
abstract = {Peer pressure is the influence exerted by a peer group or an individual encouraging other individuals to change their attitudes, values or behaviors in order to conform to group norms. The main objective of this study is to examine the impact of peer-pressure and persuasion on the acceptance of Adire Fabrics (clothes) in Westerner Nigeria. The survey research design was adopted in this study. The population includes Staff / employee of the organization, customer / distributor and consumer / end user, While Chi-square formula was used to determine the sample size. Both primary and secondary data was used while 80-item questionnaire was the main instrument of data collection. The Chi-square formula was used to analyze the data and test the hypothesis formulated in the study. The analysis was based on the response from completed questionnaire. The summary of findings state that there is a significance relationship between peer-pressure and decision making. It was concluded that Peer influence has both negative and positive impact on adult’s behavior. Among major recommendation was that Individuals should be encouraged not to give into peer pressure in order for them to be accepted and fit in a group
Keywords: Peer Pressure, Middle Adulthood, Independent Decision Organization, Management},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Peer pressure is the influence exerted by a peer group or an individual encouraging other individuals to change their attitudes, values or behaviors in order to conform to group norms. The main objective of this study is to examine the impact of peer-pressure and persuasion on the acceptance of Adire Fabrics (clothes) in Westerner Nigeria. The survey research design was adopted in this study. The population includes Staff / employee of the organization, customer / distributor and consumer / end user, While Chi-square formula was used to determine the sample size. Both primary and secondary data was used while 80-item questionnaire was the main instrument of data collection. The Chi-square formula was used to analyze the data and test the hypothesis formulated in the study. The analysis was based on the response from completed questionnaire. The summary of findings state that there is a significance relationship between peer-pressure and decision making. It was concluded that Peer influence has both negative and positive impact on adult’s behavior. Among major recommendation was that Individuals should be encouraged not to give into peer pressure in order for them to be accepted and fit in a group
Keywords: Peer Pressure, Middle Adulthood, Independent Decision Organization, Management
Keywords: Peer Pressure, Middle Adulthood, Independent Decision Organization, Management
ELEYOWO ISRAEL OLUSEGUN IBIKUNLE OLAJIDE, OGUNMEFUN OLALEKAN PETER
In: International Journal of Academic Research and Innovation, vol. 2, no. 1, pp. 8 - 13, 2022, ISSN: 2545 – 5214.
@article{IJARI-22-002,
title = {EFFECTS OF COVID-19 PANDEMIC ON THE USE OF INSTRUCTIONAL MATERIALS IN TEACHING AND LEARNING OF MATHEMATICS IN POLYTECHNIC EDUCATION DURING LOCKDOWN IN SOUTHWEST NIGERIA},
author = {IBIKUNLE OLAJIDE, ELEYOWO ISRAEL OLUSEGUN, OGUNMEFUN OLALEKAN PETER, SOTONWA OLAWALE EMMANUEL, BIYA EMMANUEL BABATUNDE},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2022/02/IJARI-22-01-002.pdf},
issn = {2545 – 5214},
year = {2022},
date = {2022-02-22},
journal = {International Journal of Academic Research and Innovation},
volume = {2},
number = {1},
pages = {8 - 13},
abstract = {The study examined the effects of covid-19 on the use of instructional materials in teaching and learning of mathematics in polytechnic education during the covid-19 induced lockdown in south west, Nigeria. As a result of these, a total of five hundred (500) students and fifty (50) Mathematics lecturers were used for the survey from five selected polytechnics in south west, Nigeria. Questionnaires and interview schedule were used for data collection. Descriptive statistics and content analysis were also used in analyzing the quantitative and qualitative data respectively. A frequency table was deplored to present the quantitative data while qualitative data were presented mathematically. The study revealed that 65.3% of lecturers have strong opinion that visual based (34.9%) and audio based (65.3%) instructional materials were used to disseminate mathematics lectures during covid-19 pandemic. Summaries were made and recommendations were proffered on how to improve the use of visual instructional materials in teaching and learning process in schools in order to improve performance in mathematics.
Keywords: Covid-19, Pandemic, Instructional Materials, Mathematics, Students, Teachers.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The study examined the effects of covid-19 on the use of instructional materials in teaching and learning of mathematics in polytechnic education during the covid-19 induced lockdown in south west, Nigeria. As a result of these, a total of five hundred (500) students and fifty (50) Mathematics lecturers were used for the survey from five selected polytechnics in south west, Nigeria. Questionnaires and interview schedule were used for data collection. Descriptive statistics and content analysis were also used in analyzing the quantitative and qualitative data respectively. A frequency table was deplored to present the quantitative data while qualitative data were presented mathematically. The study revealed that 65.3% of lecturers have strong opinion that visual based (34.9%) and audio based (65.3%) instructional materials were used to disseminate mathematics lectures during covid-19 pandemic. Summaries were made and recommendations were proffered on how to improve the use of visual instructional materials in teaching and learning process in schools in order to improve performance in mathematics.
Keywords: Covid-19, Pandemic, Instructional Materials, Mathematics, Students, Teachers.
Keywords: Covid-19, Pandemic, Instructional Materials, Mathematics, Students, Teachers.
2021
AFOLAYAN, Olumide Andrew
LOCALLY FABRICATED UNINTERUPTED POWER SUPPLY (UPS) FOR SYSTEM COMPATIBILITY Journal Article
In: International Journal of Academic Research and Innovation, vol. 1, no. 1, pp. 10-14, 2021, ISSN: 2545–5214.
@article{IJARI2101002,
title = {LOCALLY FABRICATED UNINTERUPTED POWER SUPPLY (UPS) FOR SYSTEM COMPATIBILITY},
author = {Olumide Andrew AFOLAYAN},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2021/06/IJARI-21-01-002.pdf},
issn = {2545–5214},
year = {2021},
date = {2021-06-07},
journal = {International Journal of Academic Research and Innovation},
volume = {1},
number = {1},
pages = {10-14},
abstract = {Uninterrupted power supply is an electrical device that provides emergency power to a load when the input power source, typically the utility mains fails or whenever the line voltage varies outside normal limits. Obviously, uninterrupted power supply (UPS) is an indispensable power unit in every size of establishment. Its features such as noiseless working condition, availability of storage elements, numerous system compatibility, etc. have not in any way marred its acceptance. This device is really dominating computer establishments in most developing countries. It has also been found useful in many other applications in big industries, homes offices, industries and religious centers and places of worship for continuous sustainability of energy supplied to electronic gadgets. The stages of the design were divided into sections. The UPS was switched ON, the bulb started to glow, and the UPS worked properly. The components of the UPS such as MOSFET transistor, relay, inverter, transformer and change over circuit were working properly and efficiently.
Keywords: UPS, Inverter, Oscillating, Switching, Change-Over, Loww-Battery},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Uninterrupted power supply is an electrical device that provides emergency power to a load when the input power source, typically the utility mains fails or whenever the line voltage varies outside normal limits. Obviously, uninterrupted power supply (UPS) is an indispensable power unit in every size of establishment. Its features such as noiseless working condition, availability of storage elements, numerous system compatibility, etc. have not in any way marred its acceptance. This device is really dominating computer establishments in most developing countries. It has also been found useful in many other applications in big industries, homes offices, industries and religious centers and places of worship for continuous sustainability of energy supplied to electronic gadgets. The stages of the design were divided into sections. The UPS was switched ON, the bulb started to glow, and the UPS worked properly. The components of the UPS such as MOSFET transistor, relay, inverter, transformer and change over circuit were working properly and efficiently.
Keywords: UPS, Inverter, Oscillating, Switching, Change-Over, Loww-Battery
Keywords: UPS, Inverter, Oscillating, Switching, Change-Over, Loww-Battery
AFOLAYAN, Olumide Andrew
DESIGN AND CONSTRUCTION OF AUDIO POWER AMPLIFIER Journal Article
In: International Journal of Advanced Multidisciplinary Academic Research and Development, vol. 1, no. 1, pp. 1-6, 2021, ISSN: 2545-5354.
@article{IJAMARD-21-001,
title = {DESIGN AND CONSTRUCTION OF AUDIO POWER AMPLIFIER},
author = {Olumide Andrew AFOLAYAN},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2021/06/IJAMARD-21-001.pdf},
issn = {2545-5354},
year = {2021},
date = {2021-06-05},
journal = {International Journal of Advanced Multidisciplinary Academic Research and Development},
volume = {1},
number = {1},
pages = {1-6},
abstract = {Amplifiers, as the name implies, are electronic devices that boost or strengthen an input signal. This study designed and constructed 30 W audio power amplifier using TDA2040 modules from the circuit digest. The amplifier was designed and constructed using integrated Circuit (TDA2040) and the simulation of the circuit was carried out using proteous 8 professional. The power supply unit was constructed using 12V-0-12V center-tap step-down transformer and thereafter the amplifier. The amplifier was tested and the results showed that the amplifier exhibited low distortion. The output power and efficiency were found to be 30.00 watts and 78.5 % respectively. The circuit simulation was a success, and that the agreement between the simulated and experimental result confirms the good performance of the amplifier.
Keywords: Audio, Power, Amplifier, Vero board, Ripples, Signal.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Amplifiers, as the name implies, are electronic devices that boost or strengthen an input signal. This study designed and constructed 30 W audio power amplifier using TDA2040 modules from the circuit digest. The amplifier was designed and constructed using integrated Circuit (TDA2040) and the simulation of the circuit was carried out using proteous 8 professional. The power supply unit was constructed using 12V-0-12V center-tap step-down transformer and thereafter the amplifier. The amplifier was tested and the results showed that the amplifier exhibited low distortion. The output power and efficiency were found to be 30.00 watts and 78.5 % respectively. The circuit simulation was a success, and that the agreement between the simulated and experimental result confirms the good performance of the amplifier.
Keywords: Audio, Power, Amplifier, Vero board, Ripples, Signal.
Keywords: Audio, Power, Amplifier, Vero board, Ripples, Signal.
OLAREWAJU, Akinola Johnson
California Bearing-Ratio Characteristics of Palm Kernel Shell Stabilized Sedimentary Formation Journal Article
In: International Journal of Academic Research and Innovation, vol. 1, no. 1, pp. 1-9, 2021, ISSN: 2545–5214.
@article{IJARI-21-001,
title = {California Bearing-Ratio Characteristics of Palm Kernel Shell Stabilized Sedimentary Formation},
author = {Akinola Johnson OLAREWAJU},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://perfectengineeringassociates.com/wp-content/uploads/2021/01/IJARI-21-001.pdf},
issn = {2545–5214},
year = {2021},
date = {2021-01-19},
journal = {International Journal of Academic Research and Innovation},
volume = {1},
number = {1},
pages = {1-9},
abstract = {There is increase in demand for safe, durable and economical roads, especially in the rural areas. The high cost of stabilizing agent, environmental effects of dumping of agricultural waste such as palm kernel shell and implications involved in the process of transporting materials from borrow pit pose serious threats to human and the environment. Therefore, there is need to look for affordable alternatives. The lateritic soil used in this study was taken from the sedimentary formation located at Abalabi ( 53’ 13.758”N, 7’ 59.994”E), Ajegunle, along Papalanto-Ilaro road, Ogun State, Nigeria and palm kernel shell wastes were taken from oil palm producing plant at Iweke along Ilaro-Owode Road, Ilaro, Ogun State, Nigeria. The palm kernel shells were broken into pieces passing through 5mm sieve and then substituted for lateritic soil in the range of 0% to 50% at 5% intervals with 0% palm kernel shell substitution serving as control experiment. In line with BS 1377 (1990), pressure loads were applied on the composite materials and California Bearing-Ratio tests conducted at different test water contents for all the substitutions. From the results, California Bearing-Ratio value increased gradually as palm kernel shell substitution increases while 25% palm kernel shell substitution has the maximum CBR value at both top and bottom. In addition, for the 40% to 50% palm kernel shell substitutions, maximum CBR values were observed from their initial test water content. The composite material with palm kernel shell at 25% can be used for road base and sub base. Finally, recycling of palm kernel shell wastes is an alternative solution of safe disposal of the agro waste called palm kernel shell. There environmental risk and hazard caused by palm kernel shell wastes could be greatly reduced if not completely eliminated.
Keywords: CBR, Stabilization, Sedimentary, Formation, Composite, Material.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
There is increase in demand for safe, durable and economical roads, especially in the rural areas. The high cost of stabilizing agent, environmental effects of dumping of agricultural waste such as palm kernel shell and implications involved in the process of transporting materials from borrow pit pose serious threats to human and the environment. Therefore, there is need to look for affordable alternatives. The lateritic soil used in this study was taken from the sedimentary formation located at Abalabi ( 53’ 13.758”N, 7’ 59.994”E), Ajegunle, along Papalanto-Ilaro road, Ogun State, Nigeria and palm kernel shell wastes were taken from oil palm producing plant at Iweke along Ilaro-Owode Road, Ilaro, Ogun State, Nigeria. The palm kernel shells were broken into pieces passing through 5mm sieve and then substituted for lateritic soil in the range of 0% to 50% at 5% intervals with 0% palm kernel shell substitution serving as control experiment. In line with BS 1377 (1990), pressure loads were applied on the composite materials and California Bearing-Ratio tests conducted at different test water contents for all the substitutions. From the results, California Bearing-Ratio value increased gradually as palm kernel shell substitution increases while 25% palm kernel shell substitution has the maximum CBR value at both top and bottom. In addition, for the 40% to 50% palm kernel shell substitutions, maximum CBR values were observed from their initial test water content. The composite material with palm kernel shell at 25% can be used for road base and sub base. Finally, recycling of palm kernel shell wastes is an alternative solution of safe disposal of the agro waste called palm kernel shell. There environmental risk and hazard caused by palm kernel shell wastes could be greatly reduced if not completely eliminated.
Keywords: CBR, Stabilization, Sedimentary, Formation, Composite, Material.
Keywords: CBR, Stabilization, Sedimentary, Formation, Composite, Material.
2017
Nigeria, Akinola Johnson OLAREWAJU
CBR Strength Characteristics of a Laterite Stabilized with 12% to 20% (Medium Dosage) Thermoplastic Journal Article
In: International Journal of Academic Research and Innovation, vol. 1, no. 1, pp. 1-9, 2017, ISSN: ISSN: 2545 – 5214.
@article{IJARI1701001,
title = {CBR Strength Characteristics of a Laterite Stabilized with 12% to 20% (Medium Dosage) Thermoplastic},
author = {Nigeria, Akinola Johnson OLAREWAJU},
editor = {Dr. Akinola Johnson OLAREWAJU},
url = {http://ijari.org.ng/wp-content/uploads/2018/01/IJARI-17-01-001.pdf},
issn = {ISSN: 2545 – 5214},
year = {2017},
date = {2017-10-12},
journal = {International Journal of Academic Research and Innovation},
volume = {1},
number = {1},
pages = {1-9},
abstract = {This study is aimed at investigating the possibility of using thermoplastic as an alternative for road construction materials. This is with a view to recycling plastic wastes to stop the menace of environmental pollution. The lateritic soil used in this study was taken at Ajegunle, Abalabi (6 53’ 13.758”N, 3 7’ 59.994”E) along Papa-Ilaro road, Ogun State, Nigeria and the solid thermoplastic wastes were taken from plastic recycling plant at Papalanto (6 53’ 26.406”N, 310’ 21.788”E), Ogun State, Nigeria. The thermoplastic were grounded into pellets passing through 5mm sieve and then substituted for lateritic soil from a range of 12% to 20% at 2% interval for California Bearing Ratio (CBR) soaked and unsoaked tests while 0% served as control experiment. The tests conducted in line with BS 1377 (1990) are soaked and unsoaked CBR. From the results, it was observed that medium dosage plastic pellet stabilized lateritic soil exhibit the same strength characteristic as lateritic soil. In addition, the CBR values increases as percentage of plastic pellet increases for both soaked and unsoaked medium dosage substitutions. Based on the results of this study, plastic pellet could be used as a substitute and stabilizing agent in lateritic soil for construction material. Therefore, environmental risk and hazard caused by plastic waste could be greatly reduced.
Keywords: Thermoplastic, Environment, Laterite, CBR, Soaked, Unsoaked},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study is aimed at investigating the possibility of using thermoplastic as an alternative for road construction materials. This is with a view to recycling plastic wastes to stop the menace of environmental pollution. The lateritic soil used in this study was taken at Ajegunle, Abalabi (6 53’ 13.758”N, 3 7’ 59.994”E) along Papa-Ilaro road, Ogun State, Nigeria and the solid thermoplastic wastes were taken from plastic recycling plant at Papalanto (6 53’ 26.406”N, 310’ 21.788”E), Ogun State, Nigeria. The thermoplastic were grounded into pellets passing through 5mm sieve and then substituted for lateritic soil from a range of 12% to 20% at 2% interval for California Bearing Ratio (CBR) soaked and unsoaked tests while 0% served as control experiment. The tests conducted in line with BS 1377 (1990) are soaked and unsoaked CBR. From the results, it was observed that medium dosage plastic pellet stabilized lateritic soil exhibit the same strength characteristic as lateritic soil. In addition, the CBR values increases as percentage of plastic pellet increases for both soaked and unsoaked medium dosage substitutions. Based on the results of this study, plastic pellet could be used as a substitute and stabilizing agent in lateritic soil for construction material. Therefore, environmental risk and hazard caused by plastic waste could be greatly reduced.
Keywords: Thermoplastic, Environment, Laterite, CBR, Soaked, Unsoaked
Keywords: Thermoplastic, Environment, Laterite, CBR, Soaked, Unsoaked
2016
Nigeria, Akinola Johnson OLAREWAJU
Characteristics of Densified Plastic Pellet Stabilized Lateritic Soil to Reduce the Impact of Accidental Explosions on Underground Structures Journal Article
In: International Journal of Academic Research and Innovation, vol. 1, no. 1, pp. 1-7, 2016, ISSN: 2545 - 5214.
@article{IJARI-01-001,
title = {Characteristics of Densified Plastic Pellet Stabilized Lateritic Soil to Reduce the Impact of Accidental Explosions on Underground Structures},
author = {Akinola Johnson OLAREWAJU
Nigeria},
url = {http://ijari.org.ng/wp-content/uploads/2016/11/IJARI-01-001.pdf},
issn = {2545 - 5214},
year = {2016},
date = {2016-11-18},
urldate = {2016-11-18},
journal = {International Journal of Academic Research and Innovation},
volume = {1},
number = {1},
pages = {1-7},
abstract = {This study examines the effect of compacted plastic pellets stabilized lateritic soil to reduce the impact of accidental explosions on underground structures. In this study, lateritic soil and plastic were taken from Ilaro, Ogun State, Nigeria. The plastic wastes were grounded into pellets and substituted with laterite. The tests were conducted in line with BS 1377 (1990) to determine the moisture content and compaction. The results were compared with the simulated results of Olarewaju (2013) in the study of the response of underground structures due to blast loads. In the said work, soil and pipes were modeled; loads from accidental explosions were estimated using Unified Facilities Criteria (2008). Various constituents of blast considered are ground media, pipes, intervening medium, blast, blast characteristics and method of analysis (finite element formulation and solution using ABAQUS/Explicit in ABAQUS). From the results, the lowest dry density value is 0.96kg/m3 and 1.130 kg/m3 respectively at 30% plastic pellets mixed with lateritic soil. In the work of Olarewaju (2013), dimensionless deflection at the crown, invert and spring-line of underground pipes in loose material is low compared to dense material. It is clear that at 30% and above plastic substitution, the density is relatively low and this could as soft backfill material reduce the impact of accidental explosions on underground structures. Consequently, loads arising from various accidental explosions on underground structures would be greatly reduce, if not completely eliminated
Keywords: Plastic Pellets, Explosion, Laterite, Underground, Structures},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study examines the effect of compacted plastic pellets stabilized lateritic soil to reduce the impact of accidental explosions on underground structures. In this study, lateritic soil and plastic were taken from Ilaro, Ogun State, Nigeria. The plastic wastes were grounded into pellets and substituted with laterite. The tests were conducted in line with BS 1377 (1990) to determine the moisture content and compaction. The results were compared with the simulated results of Olarewaju (2013) in the study of the response of underground structures due to blast loads. In the said work, soil and pipes were modeled; loads from accidental explosions were estimated using Unified Facilities Criteria (2008). Various constituents of blast considered are ground media, pipes, intervening medium, blast, blast characteristics and method of analysis (finite element formulation and solution using ABAQUS/Explicit in ABAQUS). From the results, the lowest dry density value is 0.96kg/m3 and 1.130 kg/m3 respectively at 30% plastic pellets mixed with lateritic soil. In the work of Olarewaju (2013), dimensionless deflection at the crown, invert and spring-line of underground pipes in loose material is low compared to dense material. It is clear that at 30% and above plastic substitution, the density is relatively low and this could as soft backfill material reduce the impact of accidental explosions on underground structures. Consequently, loads arising from various accidental explosions on underground structures would be greatly reduce, if not completely eliminated
Keywords: Plastic Pellets, Explosion, Laterite, Underground, Structures
Keywords: Plastic Pellets, Explosion, Laterite, Underground, Structures
