Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM 10), and fine (PM 2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30-10:00 pm at a measurement height of 1.3 m and the center in the living rooms of the residences assessed. Results: The analysis of the data obtained showed that the mean values for each of the air quality parameters obtained during generator usages were significantly higher when compared to the indoor air quality parameters before generator usages at p<0.05. The air pollutant levels before and during generator usages were within the established safe standard air quality limit by the world health organization. Conclusion: However, for the installation of a portable electricity generator at the residents' balcony, it is recommended that the generators should be adapted with an emission reduction device for the exhaust composition amelioration to avoid possible accumulation effect over time.
Power quality issues are usually consumer-caused or end-user point-of-care issues that are manife... more Power quality issues are usually consumer-caused or end-user point-of-care issues that are manifested as current, voltage, or frequency abnormalities that result in consumer device failure or utility failure. This study was conducted to examine power quality and voltage interruptions, their costs and technical implications for SMEs whose most important resource for business operations is electricity. The research methodology employed for this study involved the collection, analysis and integration of quantitative data on power quality disturbances that sensitive SMEs that tolerate electric/electronic utilities can tolerate. The results obtained showed a high proportion of electricity deficits and voltage fluctuations deviating from the nominal 220-volt standard prescribed for household purposes in the country. The impact of the power problem on operational costs was represented in a modelled relationship constructed for induced cost and voltage disturbance variables. The multiple damaging effects of voltage disturbances on SMEs require urgent regulation on the part of the distribution network and the consumer side.
The response of various sectors of the Nigerian economy to the epileptic state of power supply fr... more The response of various sectors of the Nigerian economy to the epileptic state of power supply from the Nigerian electricity grid has greatly contributed to the acquisition and use of mobile power generation equipment as an alternative energy source. This study examined the acoustic impact of power generation facilities on residential environments in the greater Abeokuta area. The total noise emitted by each portable generator was measured at various distances of 1 meter each, starting at 1 m from the portable generator and up to 5 m from the previous measurement point. Measurements were taken 15-30 minutes before and after the operation of the portable power plant and 30-60 minutes during operation. Data was collected using a tape measure, a digital stopwatch and a GM 1352 sound level meter. The average results for noise emission during use of the generator were maximum (mean = 83.93 dBA, SD = 1.35) and minimum (mean = 71.72 dBA, SD = 0.85) at a distance of 1 m, which was much higher than the average environmental noise level before (mean = 47.36, SD = 0.75) and after (mean = 47.63, SD = 0, 75) generator operation. Analysis of noise level intensity for household acoustic comfort using the United States Department of Housing and Urban Development's recommended categories of typical noise levels for residential areas revealed that the outdoor noise levels of the assessed environment before and after use of portable power generation equipment were within LAeq ≤ 49 dBA and 49 < LAeq ≤ 62 dBA, which represent clearly and normally acceptable noise level limits for residential areas. However, the noise levels modified to ranges within of 62 < LAeq ≤ 76 dBA (normal) and LAeq > 76 dBA (clearly) unacceptable noise level when using portable power generators. This means that power plants pose a noise nuisance to the outside of the houses in which they are used to supply electricity, thereby affecting the acoustic comfort of that environment.
Food insecurity caused by decline in food production due to shortage of workforce, has necessitat... more Food insecurity caused by decline in food production due to shortage of workforce, has necessitated the automation of the various agricultural operations. The study was aimed at the design and development of a prototype drip irrigation robotic system, which used the internet services for its operation (Internet of Things). The robot has a microcontroller, soil moisture and temperature sensors and a water pump. During operation, the robot received the input commands through the soil temperature and moisture sensors. It had the ability to deter the water requirement of the targeted crop, before irrigating it autonomously with the right volume of water. Performance evaluation of the robotic system revealed that it had an efficiency of about 90% and accuracy of about 95% when controlled through the internet. This prototype will help in the production of automated drip irrigation robots, that will preformed effectively in the field.
The complexity of underwater acoustic channel is considered to be quite possibly nature's most un... more The complexity of underwater acoustic channel is considered to be quite possibly nature's most unforgiving wireless medium. Nodes in underwater sensor networks which are used for oceanographic data collection, pollution monitoring, offshore exploration, tactical surveillance applications, and rapid environmental assessments are constrained by harsh physical environment. Also, data delivery schemes originally designed for terrestrial sensor networks are unsuitable for use in the underwater environment. Hence, this work investigates the development of an underwater transmission model by proposing a conceptualized Model for Data Transmission in Underwater Acoustic Wireless Sensor Network. The work assume that the noise power is the same for all the links. The work also assumes the channels are stable over each transmission frame. Without the relay nodes, the proposed mathematical model presents the minimum possible transmit power to achieve the required data rate between transmitting node and relay node. It evaluates the proposed model, after conducting several trials under different operating conditions using the data obtained. It then shows Throughput against Channel Bandwidth. Data transmission rate which can be measured from the graph shows an increase in channel bandwidth with decrease in throughput. Results show that at optimal power the proposed transmission model has significant advantages of improved performance and robustness over both the traditional direct transmission and the existing cooperative transmission schemes.
Adequate knowledge of the mechanical properties of fruits is required for the optimization of fru... more Adequate knowledge of the mechanical properties of fruits is required for the optimization of fruits harvesting robots. This study was carried out to evaluate some physical and mechanical properties of bell pepper fruits, which will be useful for the design and utilization of bell pepper fruits harvesting robots. Some mechanical properties (failure force, failure energy and compressibility) of matured bell pepper fruits were evaluated at three different dimension sizes and two fruit orientations, according to the American Society of Agricultural and Biological Engineers (ASABE) approved procedure. Results obtained from this study revealed that the fruit size and orientation had significant (p ≤ 0.05) effect on the mechanical properties of the bell pepper fruits. The failure force and failure energy of the fruit increased significantly (p ≤ 0.05) as the fruit locule number increases from 3 to 4. Relatively, the results revealed that the failure force and failure energy of the fruit increased significantly (p ≤ 0.05) as the fruit size increased from small to large size. As portrayed by this study results, the failure force and failure energy of the fruit when loaded in the natural position was higher than values obtained, when the fruit was compressed at the vertical position; irrespective of the fruit size. This revealed that the fruit at the natural position absorbed higher compressive force (pressure) and compressive energy, regardless of the fruit locule number. Results obtained from this study will present useful information for the design, programming and optimization of bell pepper harvesting and handling robots.
The world is facing food insecurity problem due to shortage of workforce and growing world popula... more The world is facing food insecurity problem due to shortage of workforce and growing world population. Robotization of crop production will help to boost food production, through effective labour conservation. This study was carried out to optimize the performance of tomato fruits' robotic harvesters, through field practices (pre-harvest treatments). Tomato (Cv. UC82B) was cultivated under four major field practices, which were: control, organic treatment, inorganic treatment using potassium nitrate (KNO 3), and combine treatment using the combination of compost manure and KNO 3. Tomato fruits were harvested at the pink maturity stage and were subjected to compression test, using the Universal Testing Machine, at three compression speeds of 15 mm/min, 20 mm/min and 25 mm/min. Results obtained from the study showed that, field practices and compression speed significantly (p ≤0.05) affected the failure parameters (failure force, failure energy and deformation) of the tomato fruits. Regardless of the compression speed, the fruits produced with combined treatment had the highest failure parameters; while the control fruits developed the least failure parameters. Tomato fruit produced using the combined treatment developed failure force, failure energy and deformation of 87.60 N, 701.97 N.mm and 16.88 mm
r e v i e w h i g h l i g h t s • Low viscous oil was obtained via the admixture of winter squash... more r e v i e w h i g h l i g h t s • Low viscous oil was obtained via the admixture of winter squash seed oil and duck waste fat. • The catalyst derived from burnt Arecaceae kernel empty bunch (AKEB) contained high K-Al-Ca. • Biodiesel properties are in conformity with recommended biodiesel standard. • A single stage transesterification batch reactor was employed.
Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM 10), and fine (PM 2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30-10:00 pm at a measurement height of 1.3 m and the center in the living rooms of the residences assessed. Results: The analysis of the data obtained showed that the mean values for each of the air quality parameters obtained during generator usages were significantly higher when compared to the indoor air quality parameters before generator usages at p<0.05. The air pollutant levels before and during generator usages were within the established safe standard air quality limit by the world health organization. Conclusion: However, for the installation of a portable electricity generator at the residents' balcony, it is recommended that the generators should be adapted with an emission reduction device for the exhaust composition amelioration to avoid possible accumulation effect over time.
Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM10), and fine (PM2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30 – 10:00 pm at a measurement height of 1.3 m and the center in the living ...
This paper assessed the hourly daylighting illuminance and light distribution of three categories... more This paper assessed the hourly daylighting illuminance and light distribution of three categories of the classroom window design in four classroomspaces in Federal University Wukari, Taraba State on illuminance-based metrics under clear sky conditions forvisual safety support of the space design. The categories of the classroom window designs were one-sided (West) window, two-sidedadjacent (South and West) windows and two-sided (North and South) opposite windows. Instrumentation design for data collectionwere A Garmin GPS 72H, Sunche model HS1010 digital luxmeter, a digital professional handheld LCD stopwatch, delectable marker pen,and generic 5m retractable measuring tape rule. The data was collected on a time-sequence basis at an hour interval from 8:00am -5:00 pm on the students' work planes. The visual performances and safety of the time-varying illuminance data obtained and analyzed on the standard metric binsand a two-tailed weighting factor variablecriterion within the ra...
The operation safety of personal audio device (PAD) as regards sound exposure intensity level con... more The operation safety of personal audio device (PAD) as regards sound exposure intensity level considered as a function of exposure duration was carried out in this study. Maximum sound output intensity (MSOI) level from the participants&#39; PADs was determined through physical measurement and analyzed on a sound exposure time guidelines. The PADs MSOI evaluation was conducted in a room environment with a background noise range of 48.4 to 57.3 decibels so as to avoid background noise interference with the choice listening levels of the participants. Analysis carried out on the obtained data showed that, for short exposure time of 0.5-2 minutes, all participants operated within recommended safety exposure time scale. Thereafter, the exposure duration from 4-120 minutes indicated a consistent increase in unsafe operation characteristics and reverse act on safe operation characteristics. It was concluded that a maintained PAD sound output intensity level exposure for an extended time space of 2 hours translated from safe to unsafe operation characteristics. It then means that time space for the PAD should be considered for either tune up or down of one&#39;s PAD as recommended safety exposure is a function of time.
This research work develops an improved automated fire management scheme by leveraging mathematic... more This research work develops an improved automated fire management scheme by leveraging mathematical formulations viz integrating signal detection filters for the detection of predetermined signal properties, adopting a scheme for energy release prediction as an efficient means of reducing both rate of false alarm/ the rate of failure to alert and finally tuning the microcontroller using PID control. These three formulations are then enshrined and implemented via the control program in the microprocessor of the proposed system. These mathematical formulations would help improve the overall response of the system by ensuring it minimizes to the barest minimum cases of false alarm triggering and false response to what is not fire. The simulation model leveraging on the mathematical models of the algorithms enumerated then characterizes the behaviour of the system. The simulation model is then characterized with PROTEUS ISIS 7.8 to give a true life scenario. The proposed system would wo...
This paper assessed the hourly daylighting illuminance and light distribution of three categories... more This paper assessed the hourly daylighting illuminance and light distribution of three categories of the classroom window design in four classroom spaces in Federal University Wukari, Taraba State on illuminance-based metrics under clear sky conditions for visual safety support of the space design. The categories of the classroom window designs were one-sided (West) window, two-sidedadjacent (South and West) windows and two-sided (North and South) opposite windows. Instrumentation design for data collection were A Garmin GPS 72H, Sunche model HS1010 digital luxmeter, a digital professional handheld LCD stopwatch, delectable marker pen,and generic 5m retractable measuring tape rule. The data was collected on a time-sequence basis at an hour interval from 8:00 am-5:00 pm on the students' work planes. The visual performances and safety of the time-varying illuminance data obtained and analyzed on the standard metric bins and a two-tailed weighting factor variable criterion within the range of Elower limit (100 lux) and Eupper limit (2000 lux) value considered as being useful and safe showed that the two-sided opposite window classrooms illuminance performance were relatively more useful and safer than that in one-sided window classrooms as well as the two-sided adjacent window classrooms. For the maximization of indoor space illuminance of classroom, two-sided opposite window design is recommended.
Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM 10), and fine (PM 2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30-10:00 pm at a measurement height of 1.3 m and the center in the living rooms of the residences assessed. Results: The analysis of the data obtained showed that the mean values for each of the air quality parameters obtained during generator usages were significantly higher when compared to the indoor air quality parameters before generator usages at p<0.05. The air pollutant levels before and during generator usages were within the established safe standard air quality limit by the world health organization. Conclusion: However, for the installation of a portable electricity generator at the residents' balcony, it is recommended that the generators should be adapted with an emission reduction device for the exhaust composition amelioration to avoid possible accumulation effect over time.
Power quality issues are usually consumer-caused or end-user point-of-care issues that are manife... more Power quality issues are usually consumer-caused or end-user point-of-care issues that are manifested as current, voltage, or frequency abnormalities that result in consumer device failure or utility failure. This study was conducted to examine power quality and voltage interruptions, their costs and technical implications for SMEs whose most important resource for business operations is electricity. The research methodology employed for this study involved the collection, analysis and integration of quantitative data on power quality disturbances that sensitive SMEs that tolerate electric/electronic utilities can tolerate. The results obtained showed a high proportion of electricity deficits and voltage fluctuations deviating from the nominal 220-volt standard prescribed for household purposes in the country. The impact of the power problem on operational costs was represented in a modelled relationship constructed for induced cost and voltage disturbance variables. The multiple damaging effects of voltage disturbances on SMEs require urgent regulation on the part of the distribution network and the consumer side.
The response of various sectors of the Nigerian economy to the epileptic state of power supply fr... more The response of various sectors of the Nigerian economy to the epileptic state of power supply from the Nigerian electricity grid has greatly contributed to the acquisition and use of mobile power generation equipment as an alternative energy source. This study examined the acoustic impact of power generation facilities on residential environments in the greater Abeokuta area. The total noise emitted by each portable generator was measured at various distances of 1 meter each, starting at 1 m from the portable generator and up to 5 m from the previous measurement point. Measurements were taken 15-30 minutes before and after the operation of the portable power plant and 30-60 minutes during operation. Data was collected using a tape measure, a digital stopwatch and a GM 1352 sound level meter. The average results for noise emission during use of the generator were maximum (mean = 83.93 dBA, SD = 1.35) and minimum (mean = 71.72 dBA, SD = 0.85) at a distance of 1 m, which was much higher than the average environmental noise level before (mean = 47.36, SD = 0.75) and after (mean = 47.63, SD = 0, 75) generator operation. Analysis of noise level intensity for household acoustic comfort using the United States Department of Housing and Urban Development's recommended categories of typical noise levels for residential areas revealed that the outdoor noise levels of the assessed environment before and after use of portable power generation equipment were within LAeq ≤ 49 dBA and 49 < LAeq ≤ 62 dBA, which represent clearly and normally acceptable noise level limits for residential areas. However, the noise levels modified to ranges within of 62 < LAeq ≤ 76 dBA (normal) and LAeq > 76 dBA (clearly) unacceptable noise level when using portable power generators. This means that power plants pose a noise nuisance to the outside of the houses in which they are used to supply electricity, thereby affecting the acoustic comfort of that environment.
Food insecurity caused by decline in food production due to shortage of workforce, has necessitat... more Food insecurity caused by decline in food production due to shortage of workforce, has necessitated the automation of the various agricultural operations. The study was aimed at the design and development of a prototype drip irrigation robotic system, which used the internet services for its operation (Internet of Things). The robot has a microcontroller, soil moisture and temperature sensors and a water pump. During operation, the robot received the input commands through the soil temperature and moisture sensors. It had the ability to deter the water requirement of the targeted crop, before irrigating it autonomously with the right volume of water. Performance evaluation of the robotic system revealed that it had an efficiency of about 90% and accuracy of about 95% when controlled through the internet. This prototype will help in the production of automated drip irrigation robots, that will preformed effectively in the field.
The complexity of underwater acoustic channel is considered to be quite possibly nature's most un... more The complexity of underwater acoustic channel is considered to be quite possibly nature's most unforgiving wireless medium. Nodes in underwater sensor networks which are used for oceanographic data collection, pollution monitoring, offshore exploration, tactical surveillance applications, and rapid environmental assessments are constrained by harsh physical environment. Also, data delivery schemes originally designed for terrestrial sensor networks are unsuitable for use in the underwater environment. Hence, this work investigates the development of an underwater transmission model by proposing a conceptualized Model for Data Transmission in Underwater Acoustic Wireless Sensor Network. The work assume that the noise power is the same for all the links. The work also assumes the channels are stable over each transmission frame. Without the relay nodes, the proposed mathematical model presents the minimum possible transmit power to achieve the required data rate between transmitting node and relay node. It evaluates the proposed model, after conducting several trials under different operating conditions using the data obtained. It then shows Throughput against Channel Bandwidth. Data transmission rate which can be measured from the graph shows an increase in channel bandwidth with decrease in throughput. Results show that at optimal power the proposed transmission model has significant advantages of improved performance and robustness over both the traditional direct transmission and the existing cooperative transmission schemes.
Adequate knowledge of the mechanical properties of fruits is required for the optimization of fru... more Adequate knowledge of the mechanical properties of fruits is required for the optimization of fruits harvesting robots. This study was carried out to evaluate some physical and mechanical properties of bell pepper fruits, which will be useful for the design and utilization of bell pepper fruits harvesting robots. Some mechanical properties (failure force, failure energy and compressibility) of matured bell pepper fruits were evaluated at three different dimension sizes and two fruit orientations, according to the American Society of Agricultural and Biological Engineers (ASABE) approved procedure. Results obtained from this study revealed that the fruit size and orientation had significant (p ≤ 0.05) effect on the mechanical properties of the bell pepper fruits. The failure force and failure energy of the fruit increased significantly (p ≤ 0.05) as the fruit locule number increases from 3 to 4. Relatively, the results revealed that the failure force and failure energy of the fruit increased significantly (p ≤ 0.05) as the fruit size increased from small to large size. As portrayed by this study results, the failure force and failure energy of the fruit when loaded in the natural position was higher than values obtained, when the fruit was compressed at the vertical position; irrespective of the fruit size. This revealed that the fruit at the natural position absorbed higher compressive force (pressure) and compressive energy, regardless of the fruit locule number. Results obtained from this study will present useful information for the design, programming and optimization of bell pepper harvesting and handling robots.
The world is facing food insecurity problem due to shortage of workforce and growing world popula... more The world is facing food insecurity problem due to shortage of workforce and growing world population. Robotization of crop production will help to boost food production, through effective labour conservation. This study was carried out to optimize the performance of tomato fruits' robotic harvesters, through field practices (pre-harvest treatments). Tomato (Cv. UC82B) was cultivated under four major field practices, which were: control, organic treatment, inorganic treatment using potassium nitrate (KNO 3), and combine treatment using the combination of compost manure and KNO 3. Tomato fruits were harvested at the pink maturity stage and were subjected to compression test, using the Universal Testing Machine, at three compression speeds of 15 mm/min, 20 mm/min and 25 mm/min. Results obtained from the study showed that, field practices and compression speed significantly (p ≤0.05) affected the failure parameters (failure force, failure energy and deformation) of the tomato fruits. Regardless of the compression speed, the fruits produced with combined treatment had the highest failure parameters; while the control fruits developed the least failure parameters. Tomato fruit produced using the combined treatment developed failure force, failure energy and deformation of 87.60 N, 701.97 N.mm and 16.88 mm
r e v i e w h i g h l i g h t s • Low viscous oil was obtained via the admixture of winter squash... more r e v i e w h i g h l i g h t s • Low viscous oil was obtained via the admixture of winter squash seed oil and duck waste fat. • The catalyst derived from burnt Arecaceae kernel empty bunch (AKEB) contained high K-Al-Ca. • Biodiesel properties are in conformity with recommended biodiesel standard. • A single stage transesterification batch reactor was employed.
Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM 10), and fine (PM 2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30-10:00 pm at a measurement height of 1.3 m and the center in the living rooms of the residences assessed. Results: The analysis of the data obtained showed that the mean values for each of the air quality parameters obtained during generator usages were significantly higher when compared to the indoor air quality parameters before generator usages at p<0.05. The air pollutant levels before and during generator usages were within the established safe standard air quality limit by the world health organization. Conclusion: However, for the installation of a portable electricity generator at the residents' balcony, it is recommended that the generators should be adapted with an emission reduction device for the exhaust composition amelioration to avoid possible accumulation effect over time.
Introduction: Toxic gases emitted from electricity generating plants used for energy production p... more Introduction: Toxic gases emitted from electricity generating plants used for energy production process diffuse in the environment thereby causing environmental air pollution. The effect of the installation and usage of portable gasoline electricity generating plants at the balcony of different households on the indoor air quality was assessed in this study. Materials and methods: The data collected were the air quality chemical composition variables which include carbon-dioxide, formaldehyde, total volatile organic compounds, coarse (PM10), and fine (PM2.5) particulate matters at the indoor of the households in Abeokuta metropolis, Ogun state, Nigeria. Physical measurement techniques used for the data collection was through the instrumentation design of two air quality testers, models WP6910 and ZN-202S. The indoor air quality assessment followed the generator nighttime usage routine between the hours of 6:30 – 10:00 pm at a measurement height of 1.3 m and the center in the living ...
This paper assessed the hourly daylighting illuminance and light distribution of three categories... more This paper assessed the hourly daylighting illuminance and light distribution of three categories of the classroom window design in four classroomspaces in Federal University Wukari, Taraba State on illuminance-based metrics under clear sky conditions forvisual safety support of the space design. The categories of the classroom window designs were one-sided (West) window, two-sidedadjacent (South and West) windows and two-sided (North and South) opposite windows. Instrumentation design for data collectionwere A Garmin GPS 72H, Sunche model HS1010 digital luxmeter, a digital professional handheld LCD stopwatch, delectable marker pen,and generic 5m retractable measuring tape rule. The data was collected on a time-sequence basis at an hour interval from 8:00am -5:00 pm on the students' work planes. The visual performances and safety of the time-varying illuminance data obtained and analyzed on the standard metric binsand a two-tailed weighting factor variablecriterion within the ra...
The operation safety of personal audio device (PAD) as regards sound exposure intensity level con... more The operation safety of personal audio device (PAD) as regards sound exposure intensity level considered as a function of exposure duration was carried out in this study. Maximum sound output intensity (MSOI) level from the participants&#39; PADs was determined through physical measurement and analyzed on a sound exposure time guidelines. The PADs MSOI evaluation was conducted in a room environment with a background noise range of 48.4 to 57.3 decibels so as to avoid background noise interference with the choice listening levels of the participants. Analysis carried out on the obtained data showed that, for short exposure time of 0.5-2 minutes, all participants operated within recommended safety exposure time scale. Thereafter, the exposure duration from 4-120 minutes indicated a consistent increase in unsafe operation characteristics and reverse act on safe operation characteristics. It was concluded that a maintained PAD sound output intensity level exposure for an extended time space of 2 hours translated from safe to unsafe operation characteristics. It then means that time space for the PAD should be considered for either tune up or down of one&#39;s PAD as recommended safety exposure is a function of time.
This research work develops an improved automated fire management scheme by leveraging mathematic... more This research work develops an improved automated fire management scheme by leveraging mathematical formulations viz integrating signal detection filters for the detection of predetermined signal properties, adopting a scheme for energy release prediction as an efficient means of reducing both rate of false alarm/ the rate of failure to alert and finally tuning the microcontroller using PID control. These three formulations are then enshrined and implemented via the control program in the microprocessor of the proposed system. These mathematical formulations would help improve the overall response of the system by ensuring it minimizes to the barest minimum cases of false alarm triggering and false response to what is not fire. The simulation model leveraging on the mathematical models of the algorithms enumerated then characterizes the behaviour of the system. The simulation model is then characterized with PROTEUS ISIS 7.8 to give a true life scenario. The proposed system would wo...
This paper assessed the hourly daylighting illuminance and light distribution of three categories... more This paper assessed the hourly daylighting illuminance and light distribution of three categories of the classroom window design in four classroom spaces in Federal University Wukari, Taraba State on illuminance-based metrics under clear sky conditions for visual safety support of the space design. The categories of the classroom window designs were one-sided (West) window, two-sidedadjacent (South and West) windows and two-sided (North and South) opposite windows. Instrumentation design for data collection were A Garmin GPS 72H, Sunche model HS1010 digital luxmeter, a digital professional handheld LCD stopwatch, delectable marker pen,and generic 5m retractable measuring tape rule. The data was collected on a time-sequence basis at an hour interval from 8:00 am-5:00 pm on the students' work planes. The visual performances and safety of the time-varying illuminance data obtained and analyzed on the standard metric bins and a two-tailed weighting factor variable criterion within the range of Elower limit (100 lux) and Eupper limit (2000 lux) value considered as being useful and safe showed that the two-sided opposite window classrooms illuminance performance were relatively more useful and safer than that in one-sided window classrooms as well as the two-sided adjacent window classrooms. For the maximization of indoor space illuminance of classroom, two-sided opposite window design is recommended.
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Papers by Idama Omokaro