In this study, advanced data mining techniques and Automatic Identification System (AIS) data wer... more In this study, advanced data mining techniques and Automatic Identification System (AIS) data were used to examine the tidal and wave dynamics of the Strait of Malacca. This strait has been an important commercial route for centuries, connecting the Indian Ocean to the South China Sea and the Pacific Ocean. It is located between Sumatra Island's east coast and Peninsular Malaysia's west coast, with the Strait of Singapore at its southeast end. The study's initial findings indicate a strong correlation between the distance of ships' coordinates and the timing of the tide, which is mainly influenced by the harmonic motion of the sun and the moon. Through AIS data mining and analysis, this study demonstrates the potential for predicting sea heights during tidal events. These results could be further explored in future research. Overall, this study offers valuable insights into the intricate tidal and wave dynamics of the world's longest strait and highlights the pro...
Abstract— Port Klang is one of the busiest ports in the worlds and have played an important role ... more Abstract— Port Klang is one of the busiest ports in the worlds and have played an important role to ensure the import and export activities towards Malaysian economy sector. Port Klang located in a busy marine sea route of Strait of Malacca received a great amount of vessels making it a high density port and more likely exposed to the collision risk. From the analysis of Automatic Identification System (AIS) data, the marine traffic pattern of the study area will be characterized. The raw AIS data collected through AIS receiver that was installed at Universiti Teknologi Mara, Shah Alam, Malaysia. The data was collected from July 2016 until December 2016. A web-based application was developed to decode the raw data collected for analysis and characteristic purpose. The decoded raw data were presented statically and through graphical method. The variable that need to be consider such as number of vessels, type of vessels, course over ground, and speed over ground of the vessels. The path for dangerous category vessels was also plotted.
e-mail: masnawimustaffa@gmail.com In the study of ocean engineering, marine traffic is referring ... more e-mail: masnawimustaffa@gmail.com In the study of ocean engineering, marine traffic is referring to the study of the pattern of the density of ships within the particular boundaries at certain periods. The Port Klang and Straits of Malacca are known for one of the heaviest traffics in Malaysia and the world. The study of traffic within this area is important, because it enables ships to avoid traffic congestion that might happen. Thus, this study is mainly aimed at predicting or forecasting the density of the ships using the route through this waterway by using quantitative methods which are timeseries models and the associative models from the Automatic Identification System (AIS) data. The moving averages, weight moving average, and exponential smoothing for the time series model and associative model have used multiple regression. The results show an exponential smoothing alpha 0.8 and give the lowest MAPE as 20.701%, thereby making this method to be the best in forecasting the f...
Abstract: The Automatic Identification System (AIS) technology is a system that enables a vessel ... more Abstract: The Automatic Identification System (AIS) technology is a system that enables a vessel to get information about encountered vessel such as their position, course, speed and others automatically by very high frequency (VHF) radio transmission. This technology has been widely applied in maritime industry to contribute the improvement of marine traffic control and safety. This project is interested to analyse the AIS data collected in order to examines the movements of vessels that transit at Port Klang and Strait of Malacca by mapping the vessels path based on its position (latitude and longitude). The mappings are then investigate and evaluate to visualise the flow of vessel traffic density using the AIS system
Direct conversion of waste heat to electrical energy could address present energy challenges. Bi2... more Direct conversion of waste heat to electrical energy could address present energy challenges. Bi2Se3 is one of few thermoelectric materials known to operate at room temperature. Comprehensive analysis using density functional theory was conducted to explore the effect of nickel doping on structural, electronic, and thermoelectric properties of Bi2Se3. Local density approximation (LDA) was used with an addition of spin-orbit coupling (SOC) and van der Waals interaction scheme consideration. Analysis of the effect of SOC was elaborated. It was found that nickel has changed the crystal structure of Bi2Se3. Nickel has also changed band structure and density of state that alter the thermoelectric performance. The decreased band gap has decreased the thermopower. However, it gives advantages to the improvement of electrical conductivity. Higher electrical conductivity has risen thermal conductivity. Despite the decreased thermopower and increased thermal conductivity, the higher electrica...
Good thermoelectric performance is being sought to face major problems related to energy, especia... more Good thermoelectric performance is being sought to face major problems related to energy, especially in the concern of the usage of energy on environmental impact. In this work, we investigate the underlying mechanism to enhance the thermoelectric performance of bismuth selenide (Bi2Se3) by employing density functional theory (DFT) followed by the Boltzmann transport equation under relaxation time approximation. The structural, electronic, and thermoelectric properties were calculated and analyzed. From the analysis of combined results of thermoelectric properties and electronic properties as the function of the Fermi level, we found that the power factor of Bi2Se3 is improved by increasing electrical conductivity that contributed by the large density of states and light effective mass of charge carriers. The figure of merit, on the other hand, is enhanced by increasing Seebeck coefficient that contributed by heavy effective mass and decreasing thermal conductivity that contributed ...
Abstract Solid polymer electrolytes (SPEs) were prepared and their electrochemical characteristic... more Abstract Solid polymer electrolytes (SPEs) were prepared and their electrochemical characteristics were characterized. The composition of SPEs containing chitosan, lithium trifluoromethane sulfonimide (LiN (CF 3 SO 2) 2) and oleic acid (OA) was optimized ...
Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environ... more Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environmental concern due to its efficiency to perform at room temperature. Based on the first-principles calculation of density functional theory (DFT) by using CASTEP computer code, structural and electronic properties of Bi2Se3 were investigated. The calculation is conducted within the exchange-correlation of local density approximation (LDA) and generalized gradient approximation within the revision of Perdew-Burke-Ernzerhof (GGA-PBE) functional. It was found that the results are consistent with previous works of theoretical study with small percentage difference. LDA exchange-correlation functional method is more accurate and have a better agreement than GGA-PBE to describe the structural properties of Bi2Se3 which consist of lattice parameters. LDA functional also shown more accurate electronic structure of Bi2Se3 that consist of band structure and density of states (DOS) which consistent...
Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environ... more Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environmental concern due to its efficiency to perform at room temperature. Based on the first-principles calculation of density functional theory (DFT) by using CASTEP computer code, structural and electronic properties of Bi2Se3 were investigated. The calculation is conducted within the exchange-correlation of local density approximation (LDA) and generalized gradient approximation within the revision of Perdew-Burke-Ernzerhof (GGA-PBE) functional. It was found that the results are consistent with previous works of theoretical study with small percentage difference. LDA exchange-correlation functional method is more accurate and have a better agreement than GGA-PBE to describe the structural properties of Bi2Se3 which consist of lattice parameters. LDA functional also shown more accurate electronic structure of Bi2Se3 that consist of band structure and density of states (DOS) which consistent...
In 2005, the Malaysian Government (GoM) launched Malaysian Building Integrated Photovoltaic (MBIP... more In 2005, the Malaysian Government (GoM) launched Malaysian Building Integrated Photovoltaic (MBIPV) project which is a jointly sponsored program between GoM and the United Nations Development Program (UNDP) which aims in promoting renewable energy, using photovoltaic (PV) technology integrated in buildings. The portal is expected to be as the quick reference point of PV consumers, PV installers and researchers to study the feasibility of numerous PV systems in Malaysia. The portal development mainly involves the web design, data collection from actual sites, data analysis and performance summary of each PV system in Malaysia. The PVMC portal benefits the PV community as they can view current progress about the usage and energy production which can be accessed anywhere and everywhere. In summary, this paper discuss the design, development of photovoltaic monitoring system web portal developed by the Photovoltaic Monitoring Centre (PVMC) Universiti Teknologi MARA which serves as a source of information for the MBIPV system performance. current (DC) power. The power is fed into an inverter that converts into alternating current (AC) power, which is then fed into the grid. For grid-interactive systems, the system imports energy from the grid when the PV generation is not enough to meet the loads. In addition, the system exports energy into the grid when the PV generation exceeds the load requirement [1]. Photovoltaic (PV) system or "solar electricity" converts sunlight (light energy) into electricity. The electric is processed silently with no depletion of natural resources [2]. PV is also exceedingly versatile as the same technology that can pump water and provide communications and village electrification in situations where no electricity is available, currently being used to produce electricity for the buildings and distribution grids of the industrialized countries [3]. Figur e 1 shows the i l lustrat ion of Sola r Photovoltaic (PV).
In this study, advanced data mining techniques and Automatic Identification System (AIS) data wer... more In this study, advanced data mining techniques and Automatic Identification System (AIS) data were used to examine the tidal and wave dynamics of the Strait of Malacca. This strait has been an important commercial route for centuries, connecting the Indian Ocean to the South China Sea and the Pacific Ocean. It is located between Sumatra Island's east coast and Peninsular Malaysia's west coast, with the Strait of Singapore at its southeast end. The study's initial findings indicate a strong correlation between the distance of ships' coordinates and the timing of the tide, which is mainly influenced by the harmonic motion of the sun and the moon. Through AIS data mining and analysis, this study demonstrates the potential for predicting sea heights during tidal events. These results could be further explored in future research. Overall, this study offers valuable insights into the intricate tidal and wave dynamics of the world's longest strait and highlights the pro...
Abstract— Port Klang is one of the busiest ports in the worlds and have played an important role ... more Abstract— Port Klang is one of the busiest ports in the worlds and have played an important role to ensure the import and export activities towards Malaysian economy sector. Port Klang located in a busy marine sea route of Strait of Malacca received a great amount of vessels making it a high density port and more likely exposed to the collision risk. From the analysis of Automatic Identification System (AIS) data, the marine traffic pattern of the study area will be characterized. The raw AIS data collected through AIS receiver that was installed at Universiti Teknologi Mara, Shah Alam, Malaysia. The data was collected from July 2016 until December 2016. A web-based application was developed to decode the raw data collected for analysis and characteristic purpose. The decoded raw data were presented statically and through graphical method. The variable that need to be consider such as number of vessels, type of vessels, course over ground, and speed over ground of the vessels. The path for dangerous category vessels was also plotted.
e-mail: masnawimustaffa@gmail.com In the study of ocean engineering, marine traffic is referring ... more e-mail: masnawimustaffa@gmail.com In the study of ocean engineering, marine traffic is referring to the study of the pattern of the density of ships within the particular boundaries at certain periods. The Port Klang and Straits of Malacca are known for one of the heaviest traffics in Malaysia and the world. The study of traffic within this area is important, because it enables ships to avoid traffic congestion that might happen. Thus, this study is mainly aimed at predicting or forecasting the density of the ships using the route through this waterway by using quantitative methods which are timeseries models and the associative models from the Automatic Identification System (AIS) data. The moving averages, weight moving average, and exponential smoothing for the time series model and associative model have used multiple regression. The results show an exponential smoothing alpha 0.8 and give the lowest MAPE as 20.701%, thereby making this method to be the best in forecasting the f...
Abstract: The Automatic Identification System (AIS) technology is a system that enables a vessel ... more Abstract: The Automatic Identification System (AIS) technology is a system that enables a vessel to get information about encountered vessel such as their position, course, speed and others automatically by very high frequency (VHF) radio transmission. This technology has been widely applied in maritime industry to contribute the improvement of marine traffic control and safety. This project is interested to analyse the AIS data collected in order to examines the movements of vessels that transit at Port Klang and Strait of Malacca by mapping the vessels path based on its position (latitude and longitude). The mappings are then investigate and evaluate to visualise the flow of vessel traffic density using the AIS system
Direct conversion of waste heat to electrical energy could address present energy challenges. Bi2... more Direct conversion of waste heat to electrical energy could address present energy challenges. Bi2Se3 is one of few thermoelectric materials known to operate at room temperature. Comprehensive analysis using density functional theory was conducted to explore the effect of nickel doping on structural, electronic, and thermoelectric properties of Bi2Se3. Local density approximation (LDA) was used with an addition of spin-orbit coupling (SOC) and van der Waals interaction scheme consideration. Analysis of the effect of SOC was elaborated. It was found that nickel has changed the crystal structure of Bi2Se3. Nickel has also changed band structure and density of state that alter the thermoelectric performance. The decreased band gap has decreased the thermopower. However, it gives advantages to the improvement of electrical conductivity. Higher electrical conductivity has risen thermal conductivity. Despite the decreased thermopower and increased thermal conductivity, the higher electrica...
Good thermoelectric performance is being sought to face major problems related to energy, especia... more Good thermoelectric performance is being sought to face major problems related to energy, especially in the concern of the usage of energy on environmental impact. In this work, we investigate the underlying mechanism to enhance the thermoelectric performance of bismuth selenide (Bi2Se3) by employing density functional theory (DFT) followed by the Boltzmann transport equation under relaxation time approximation. The structural, electronic, and thermoelectric properties were calculated and analyzed. From the analysis of combined results of thermoelectric properties and electronic properties as the function of the Fermi level, we found that the power factor of Bi2Se3 is improved by increasing electrical conductivity that contributed by the large density of states and light effective mass of charge carriers. The figure of merit, on the other hand, is enhanced by increasing Seebeck coefficient that contributed by heavy effective mass and decreasing thermal conductivity that contributed ...
Abstract Solid polymer electrolytes (SPEs) were prepared and their electrochemical characteristic... more Abstract Solid polymer electrolytes (SPEs) were prepared and their electrochemical characteristics were characterized. The composition of SPEs containing chitosan, lithium trifluoromethane sulfonimide (LiN (CF 3 SO 2) 2) and oleic acid (OA) was optimized ...
Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environ... more Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environmental concern due to its efficiency to perform at room temperature. Based on the first-principles calculation of density functional theory (DFT) by using CASTEP computer code, structural and electronic properties of Bi2Se3 were investigated. The calculation is conducted within the exchange-correlation of local density approximation (LDA) and generalized gradient approximation within the revision of Perdew-Burke-Ernzerhof (GGA-PBE) functional. It was found that the results are consistent with previous works of theoretical study with small percentage difference. LDA exchange-correlation functional method is more accurate and have a better agreement than GGA-PBE to describe the structural properties of Bi2Se3 which consist of lattice parameters. LDA functional also shown more accurate electronic structure of Bi2Se3 that consist of band structure and density of states (DOS) which consistent...
Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environ... more Bi2Se3 is one of the promising materials in thermoelectric devices and very useful out of environmental concern due to its efficiency to perform at room temperature. Based on the first-principles calculation of density functional theory (DFT) by using CASTEP computer code, structural and electronic properties of Bi2Se3 were investigated. The calculation is conducted within the exchange-correlation of local density approximation (LDA) and generalized gradient approximation within the revision of Perdew-Burke-Ernzerhof (GGA-PBE) functional. It was found that the results are consistent with previous works of theoretical study with small percentage difference. LDA exchange-correlation functional method is more accurate and have a better agreement than GGA-PBE to describe the structural properties of Bi2Se3 which consist of lattice parameters. LDA functional also shown more accurate electronic structure of Bi2Se3 that consist of band structure and density of states (DOS) which consistent...
In 2005, the Malaysian Government (GoM) launched Malaysian Building Integrated Photovoltaic (MBIP... more In 2005, the Malaysian Government (GoM) launched Malaysian Building Integrated Photovoltaic (MBIPV) project which is a jointly sponsored program between GoM and the United Nations Development Program (UNDP) which aims in promoting renewable energy, using photovoltaic (PV) technology integrated in buildings. The portal is expected to be as the quick reference point of PV consumers, PV installers and researchers to study the feasibility of numerous PV systems in Malaysia. The portal development mainly involves the web design, data collection from actual sites, data analysis and performance summary of each PV system in Malaysia. The PVMC portal benefits the PV community as they can view current progress about the usage and energy production which can be accessed anywhere and everywhere. In summary, this paper discuss the design, development of photovoltaic monitoring system web portal developed by the Photovoltaic Monitoring Centre (PVMC) Universiti Teknologi MARA which serves as a source of information for the MBIPV system performance. current (DC) power. The power is fed into an inverter that converts into alternating current (AC) power, which is then fed into the grid. For grid-interactive systems, the system imports energy from the grid when the PV generation is not enough to meet the loads. In addition, the system exports energy into the grid when the PV generation exceeds the load requirement [1]. Photovoltaic (PV) system or "solar electricity" converts sunlight (light energy) into electricity. The electric is processed silently with no depletion of natural resources [2]. PV is also exceedingly versatile as the same technology that can pump water and provide communications and village electrification in situations where no electricity is available, currently being used to produce electricity for the buildings and distribution grids of the industrialized countries [3]. Figur e 1 shows the i l lustrat ion of Sola r Photovoltaic (PV).
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