- Perum Ayodhya Citra II - G3, Maguwoharjo
Depok, Sleman - 622744437886
- Bina Nusantara University, Doctor of Computer Science, Faculty MemberSanata Dharma University, Department of Electrical Engineering, Faculty Memberadd
- Wayan Suparta is a lecturer and researcher for over 25 years. Started on 1st December 2020 he is a principal lecturer... moreWayan Suparta is a lecturer and researcher for over 25 years. Started on 1st December 2020 he is a principal lecturer at the Department of Electrical Engineering of Institut Teknologi Nasional Yogyakarta (ITNY). Previously he was a principal lecturer at the Department of Informatics of Universitas Pembangunan Jaya Tangerang (6 Feb 2019 - 5 Feb 2020). a lecturer at the Department of Electrical Engineering of Sanata Dharma University, Yogyakarta, Indonesia ( 1 Feb - 30 June 2018). He was an Adjunct Professor at the Civil Engineering Department of the University of Technology Yogyakarta (Sep 2017 – Jan 2018). He also associates faculty member of Doctor of Computer Science, Bina Nusantara University (BINUS), Jakarta from 2015 until now. Before returning to his home country, he was associated with the Space Science Centre (ANGKASA), Institute of Climate Change (IPI) of UKM in the capacity of Associate Professor from April 4, 2012, to April 3, 2017 (5 years). From April 4, 2017, onwards, he was actually a de facto full professor at the Space Science Centre (ANGKASA), IPI, UKM, but due to high-level political intrigue in UKM with the grounds of financial issues, he decided to resign on June 16, 2017. He believes that if one door of sustenance is closed then another door will open. He started his career as a teacher of Physics, Electronics, and Computer at the senior high school of SMUK Cor Jesu Malang (1994-1997), Indonesia and a teacher at SMUK Santo Aloysius Bandung (1997 – 2000). After difficult to find a job in Indonesia, he eventually became an Engineering Lecturer at the College Legenda Group, Malaysia (2000 – 2004). In 2003, he pursues a Ph.D. in Electrical, Electronic, and System Engineering of Universiti Kebangsaan Malaysia (UKM) and graduated in 2008. After Post Doctoral Fellow (2007-2008), he appointed as a Senior Lecturer (1 July 2008 – 3 April 2012) at the Institute of Space Science, UKM. His research interests involved GPS Meteorology applications, Aerospace Sciences, Communication Systems (Remote Sensing), Artificial Neural Network applications and Space meteorology. The research project, publication, award and networking, and details of his biography can be found at Wikipedia (Dr. Wayan Suparta profile), ORCID repository, or Google Scholar.edit
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Computer games have become an entertainment tool for all ages and genders. The popularity of the game has raised the attention of many researchers from various research domains. But there are some problems in game design. One of these... more
Computer games have become an entertainment tool for all ages and genders. The popularity of the game has raised the attention of many researchers from various research domains. But there are some problems in game design. One of these problems is a game adaptation that can be defined freely as the game's ability to adapt to various factors such as: gamer's skills, emotion playing, layer formats, and hardware platforms. The purpose of this paper is to propose a case-based reasoning (CBR)-based game architecture for designing adaptive textbased computer games that will be used as a delivery of high performance computing (HPC) learning.
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The development of autonomous weather station systems using Raspberry Pi3 as a new alternative, named as 'Raspi-Met' to enhance conventional meteorological systems is reported in this paper. Today, a weather station with a compact size is... more
The development of autonomous weather station systems using Raspberry Pi3 as a new alternative, named as 'Raspi-Met' to enhance conventional meteorological systems is reported in this paper. Today, a weather station with a compact size is required due to limited space and cost involved. Thus, this paper aims to design an application system using Raspberry Pi3 which is connected to Vaisala PTU300 sensors as Automatic Weather Station (AWS). The Python language under LINUX has been employed to design a graphical user interface (GUI) for a real-time monitoring system, acquisition process, and displaying three meteorological parameters at desired intervals. Data storage management and daily file in a text (*.txt) format have been created to archive historical data. The RTC module has also been developed and connected to Raspberry Pi3 to synchronize and maintain the time and date of the measurement system after the power is on. The system was installed at Carlini Base, Antarctica and has the ability to measure the surface pressure (P), temperature (T), and relative humidity (H). The results have been tested and validated that the system is capable as an AWS in the Antarctic Peninsula. The development of Raspi-Met system exhibits remarkable measurements of meteorological parameters for remote areas and the database organization becomes more efficient and practical.
Excessive rainfall is one of the triggers for the flooding phenomenon, especially in the tropics with flat or concave areas. Some critical points in the South Tangerang region, which are currently one of the most rapidly developing... more
Excessive rainfall is one of the triggers for the flooding phenomenon, especially in the tropics with flat or concave areas. Some critical points in the South Tangerang region, which are currently one of the most rapidly developing cities, cannot be ignored from the flooding problem. Floods cause disturbing human activities, loss of life and property, and in turn affect the economic stretch in an area. This paper aimed to predict rainfall by exploring the application of artificial intelligence techniques such as ANFIS (Adaptive NeuroFuzzy Inference System). The proposed technique combines neural network learning abilities with transparent linguistic representations of fuzzy systems. The ANFIS model with various input structures and membership functions was built, trained, and tested to evaluate the capability of a model. Analyses of six-year rainfall data on a monthly basis in South Tangerang City, Banten found that rainfall prediction based on ANFIS time series is promising where 80% of data testing is well predicted.
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The Antarctic continent is known to be an unpopulated region due to its extreme weather and climate conditions. However, the air quality over this continent can be affected by long-lived anthropogenic pollutants from the mainland. The... more
The Antarctic continent is known to be an unpopulated region due to its extreme weather and climate conditions. However, the air quality over this continent can be affected by long-lived anthropogenic pollutants from the mainland. The Argentinian region of Ushuaia is often the main source area of accumulated hazardous gases over the Antarctic Peninsula. The main objective of this study is to report the first in situ observations yet known of surface ozone (O3) over Ushuaia, the Drake Passage, and Coastal Antarctic Peninsula (CAP) on board the RV Australis during the Malaysian Antarctic Scientific Expedition Cruise 2016 (MASEC'16). Hourly O3 data was measured continuously for 23 days using an EcoTech O3 analyzer. To understand more about the distribution of surface O3 over the Antarctic, we present the spatial and temporal of surface O3 of long-term data (2009-2015) obtained online from the World Meteorology Organization of World Data Centre for greenhouse gases (WMO WDCGG). Furt...
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This study was based on 23-year period time series data from 1983 to 2005. An OLS method was applied to test the hypothesis that economic variables such as private investments, local government spending, prices of domestic goods, prices... more
This study was based on 23-year period time series data from 1983 to 2005. An OLS method was applied to test the hypothesis that economic variables such as private investments, local government spending, prices of domestic goods, prices of goods and income of the adjacent regions (Jakarta and South Sumatera Province) have effects on the economic growth of Lampung Province. The results of this study show that the independent economic variables have significant effects on the economic growth of Lampung Province. It is found that the interregional linkage is important. A comparison of the two neighbor provinces shows that the linkage of Lampung’s economy with Jakarta’s economy is relatively stronger than that with South Sumatera Province. The implication of this study is that the provincial and local governments of Lampung as well as the people of Lampung should make better use of the spatial spillover effect of DKI Jakarta and South Sumatera Province.
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ABSTRACT This paper reported the tropospheric precipitable water vapor (PWV) validation as an essential tool for solar-climate studies over tropical region. The PWV is measured using a ground-based GPS receiver and the surface... more
ABSTRACT This paper reported the tropospheric precipitable water vapor (PWV) validation as an essential tool for solar-climate studies over tropical region. The PWV is measured using a ground-based GPS receiver and the surface meteorological sensors. Validation of GPS PWV with radiosonde PWV along 3-week observation in November 2009 over UKM Bangi, Malaysia showed a similar trend with correlation coefficient 0.79, significantly at the 99% confidence level. The GPS PWV rate was measured lower below 1% than the radiosonde PWV and has similar characters. This implies that GPS PWV agreed very well with twice a day of radiosonde data that can be employed to monitor atmospheric variability as well as climate studies.
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With a view to difficulties with explaining the physical mechanism of solar forcing on the Earth's climate, we applied a new approach of determining and quantifying an influence of solar-related events on water vapor variability by... more
With a view to difficulties with explaining the physical mechanism of solar forcing on the Earth's climate, we applied a new approach of determining and quantifying an influence of solar-related events on water vapor variability by correlating the total electron content (TEC) and precipitable water vapor (PWV), both derived from ground-based GPS observations. In this study, ionospheric TEC and atmospheric PWV values are employed as solar activity and terrestrial climate parameters, respectively. Three-year GPS data at five stations in Antarctica are analyzed on a daily mean basis. Results show significant correlation between TEC and PWV differences during storms-affected days. The high correlation between the daily mean values of TEC and PWV, both of which follow the seasonal signals and subsisting downward trend, suggests an influence of solar activity on climate variability in Antarctica. These quantities are determined by changes of the upper-atmosphere level, which varies in conformity with the zenith angle of the Sun.
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Abstract The influence of solar energetic phenomena, solar flare index and extreme ultraviolet (EUV) on precipitable water vapor (PWV) are investigated during the intense 2003 geomagnetic storms at Scott Base station Antarctica for the... more
Abstract The influence of solar energetic phenomena, solar flare index and extreme ultraviolet (EUV) on precipitable water vapor (PWV) are investigated during the intense 2003 geomagnetic storms at Scott Base station Antarctica for the period between 22 October ...
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... Cambridge University Press. Keevallik, S., R. Hindov and U. Rannik, 1994. Solar absorption at the surface and in the atmosphere as determined by different observational methods. Theoretical and Applied Climatology, 49(4): 249-261. ...... more
... Cambridge University Press. Keevallik, S., R. Hindov and U. Rannik, 1994. Solar absorption at the surface and in the atmosphere as determined by different observational methods. Theoretical and Applied Climatology, 49(4): 249-261. ... A comparative study. Ann. Geophys. ...
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This paper presents observations of precipitable water vapor (PWV) from the Global Positioning System (GPS) signals and the surface meteorological measurements. Three stations in Antarctica that are Scott Base (SBA), Casey (CAS1),... more
This paper presents observations of precipitable water vapor (PWV) from the Global Positioning System (GPS) signals and the surface meteorological measurements. Three stations in Antarctica that are Scott Base (SBA), Casey (CAS1), Macquarie Island (MAC1) and Syowa (SYOG) were taken as the location of observation. For analysis, the data gathered from January to December 2004 are analyzed. The PWV content for Antarctic region was obtained below 10 mm (on average) with an accuracy of 1~2 mm and its variability shows a U-profile pattern. Based on this accuracy, the PWV time series for Antarctic region can be predicted through the surface temperature measurements, which is cost effective, continuous and capable of climate monitoring.
Sun-Earth coupling studies is one channel projections to explain certain physical mechanisms of how solar activity exerts their influences on severe weather or changes in global climate towards improved global forecast models and space... more
Sun-Earth coupling studies is one channel projections to explain certain physical mechanisms of how solar activity exerts their influences on severe weather or changes in global climate towards improved global forecast models and space weather prediction. Measurements of atmospheric precipitable water vapour (PWV) and the ionospheric total electron content (TEC) at Husafell, Arctic vantage point from satellite at L-band signals using the Global Positioning System (GPS) technology is addressed in this paper. In this study, the lower and upper atmosphere represented by PWV and TEC respectively, is employed as a climate and solar activity parameters to enlighten Sun-Earth connection. The diurnal variation of both PWV and TEC, and its possible connection to the solar activity during the September 2008 campaign are presented. Day-to-day changes both parameters and their diurnal cycle pattern measured in this region were clearly influenced by solar activity, indicates a reasonable couplin...
One aspect of severe storms that can be monitored is lightning activity. There is no established and accurate model to predict the lightning occurrence and to explain their comprehensive physical mechanisms. This paper aim to monitor the... more
One aspect of severe storms that can be monitored is lightning activity. There is no established and accurate model to predict the lightning occurrence and to explain their comprehensive physical mechanisms. This paper aim to monitor the lightning activity associated with water vapor changes to form convective cloud from evaporation due to solar heating. Water vapor content in term of precipitable water vapor (PWV) derived from GPS signals and the surface meteorological data is used to strengthen the GPS signals affected by the lightning. Data on November 2009 coincided with the winter monsoon (northeast monsoon) are selected, which possibly had a lot of rainfall with a high number of lightning activity. The lightning occurrence is recorded by the Surveillance et Alerte Foudre par Interférometrie Radioélectrique (SAFIR). The area for the first study is centered at radius 20 km from UKM GPS station located in Bangi, Malaysia. Results showed that major lightning activity was recorded ...
GPS data are now available at certain location around the world for any possible scientific uses. The greatest challenge is how to utilize GPS data to monitor lighting activity. This paper addressed the examination of direct impact of... more
GPS data are now available at certain location around the world for any possible scientific uses. The greatest challenge is how to utilize GPS data to monitor lighting activity. This paper addressed the examination of direct impact of lightning activity on GPS signals. Three cases of severe lightning events on August 22 of 2009 at Launching Pad, Kennedy Space Center (KSC), Florida, USA is studied. The GPS receiver at CCV6 station used for this work is 18 km away from KSC. As well, the response of solar flares on GPS signals to the lightning activity is presented for a comparison impact. The analysis was made by differencing the GPS observables.
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We here present a novel method for measuring human physical activity, which is based on detecting the electrostatic induction current generated by the walking motion under non-contact and non-attached conditions. This method involves... more
We here present a novel method for measuring human physical activity, which is based on detecting the electrostatic induction current generated by the walking motion under non-contact and non-attached conditions. This method involves measuring the electrostatic induction current flowing through a measurement electrode. A theoretical model for the electrostatic induction current generated because of a change in the electric potential
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The spatial and temporal radio wave delay of the Global Positioning System (GPS) signal can be manipulated to estimate the precipitable water vapor (PWV) which favorable for meteorological applications. A rapid change of the water vapor... more
The spatial and temporal radio wave delay of the Global Positioning System (GPS) signal can be manipulated to estimate the precipitable water vapor (PWV) which favorable for meteorological applications. A rapid change of the water vapor amount was a precondition for the unbalanced atmospheric charges, which noticeably associated with the development of convective cloud as a lightning chamber. According to this fact, GPS derived PWV will be utilized to nowcasting the lightning event for the next couple of hours. The variances of PWV of four-selected station of the Peninsular Malaysia during the past two inter-monsoons events in May and November 2009 were analyzed. To clarify the response, the changes of PWV in hourly Δ (max-min) before the lightning event was investigated with minimum value 2 mm and is maintained at least three consecutive hours. There are 177 samples were extracted from this method and 69% of the sample showed the lightning occurrence with an average duration was af...
Research Interests: Geophysics and Lightning
This short-term work characterized the upper and lower levels of the atmosphere through Global Positioning System (GPS) measurements. The observations were conducted during the 2009 equinoxes from two pairs of conjugate polar observing... more
This short-term work characterized the upper and lower levels of the atmosphere through Global Positioning System (GPS) measurements. The observations were conducted during the 2009 equinoxes from two pairs of conjugate polar observing stations: Husafell, Iceland (HUSA) and Resolute in Nunavut, Canada (RESO) and their conjugate pairs at Scott Base (SBA) and Syowa (SYOG) in Antarctica, respectively. The total electron content (TEC), an indicator of the upper atmosphere, and the precipitable water vapor (PWV), which served as the lower atmospheric response, were retrieved and analyzed. The results reveal a good relationship between TEC and PWV at each station during the onset day of the equinoxes, whereas an asymmetrical response was observed in the beginning of and after the equinoxes. In addition, the conjugate pairs were only consistent during the autumnal equinox. Thus, the high correlation was observed following the seasonal pattern for the onset day, while strong and moderate co...
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MUSIBAH pesawat Air Asia Indonesia QZ 8501 dan banjir lumpur yang berlaku di Kelantan, Sabah, Sarawak, Johor dan Negeri Sembilan telah menyedut perhatian ramai. Mereka bersimpati, ada yang terus menghulurkan bantuan dan ramai lagi yang... more
MUSIBAH pesawat Air Asia Indonesia QZ 8501 dan banjir lumpur yang berlaku di Kelantan, Sabah, Sarawak, Johor dan Negeri Sembilan telah menyedut perhatian ramai. Mereka bersimpati, ada yang terus menghulurkan bantuan dan ramai lagi yang mendoakan keselamatan mereka. Malah RTM dengan program Landskap Khas Banjir juga mula mengupas fenomena banjir dan isu-isu yang berkaitan dengannya. Berlakunya kedua-dua musibah ini sesungguhnya bukan perkara baharu. Faktor cuaca ekstrem yang berpunca daripada perubahan iklim serantau antara punca kejadian tersebut. Keragaman cuaca di lapisan atmosfera akibat interaksi tenaga antara lautan dan angkasa sememangnya kerap membawa fenomena di luar jangkaan manusia. Lapisan-lapisan aktif ini kerap memicu sirkulasi atmosferik dan cuaca boleh berubah secara mendadak. Amnya, setiap kejadian sentiasa kita didedahkan kepada dua perkara yang paling asas iaitu berpunca dari aspek material atau fizikal dan satu lagi adalah dari aspek spiritual. Dalam aspek materia...
DESCRIPTION Baru-baru ini dunia digemparkan dengan rakaman imej satelit NASA mengenai tompokan yang disebut sebagai awan air. Ia dikesan berada pada sebuah objek dan dikatakan memiliki ukuran yang boleh mencapai saiz sebesar planet dan... more
DESCRIPTION Baru-baru ini dunia digemparkan dengan rakaman imej satelit NASA mengenai tompokan yang disebut sebagai awan air. Ia dikesan berada pada sebuah objek dan dikatakan memiliki ukuran yang boleh mencapai saiz sebesar planet dan bintang. Mengikut sumber, awan air ini dikesan pada sebuah objek yang dikenali sebagai ‘brown dwarf’ atau bintang yang gagal. Objek asing ini diberi nama J08550-0715 WISE (W0855). Persoalannya, bagaimana ia berlaku? Menurut sumber, pembentukannya disebabkan kegagalan objek bertindak balas dengan nuklear akibat kekurangan jisim. Kesannya, ia menjadi pudar dan sejuk. Malah, memiliki suhu lebih sejuk daripada suhu purata bumi dan lebih panas daripada Jupiter.
Flash flood hazard in Klang Valley becomes an annual problem among urban folks, especially during the winter monsoon. Three cases of flash flood have been identified in 2013 as a case 1 for 1 September, case 2 for 31 October and case 3... more
Flash flood hazard in Klang Valley becomes an annual problem among urban folks, especially during the winter monsoon. Three cases of flash flood have been identified in 2013 as a case 1 for 1 September, case 2 for 31 October and case 3 for 13 December. This paper discussed a variation of Global Positing System (GPS) Precipitable Water Vapor (PWV) responses to the amount of rainfall within pre, during and post of the flash flood event. Surface meteorological data from three meteorological stations were interpolated to the three GPS stations to accurately measure the PWV. The analyses revealed that the trend of GPS PWV was observed highest during the phase of flash flood, of which preceded by an extreme minimum peak in two to three days before the incident. The study also found a high level of GPS PWV was associated with the frequency of rainfall and spatial distribution of precipitation. The highest total of calm and light air were also contributed to the flash flood hazard. Based on the case studies, the high level of GPS PWV and wind gusts found contributed to the chance of flash flood disaster over the Klang Valley.
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ABSTRACT Heavy rainfall over Malaysia occurs predominantly during the northeast monsoon season. Outbreaks of cold polar air over the South China Sea, known as cold surges, contribute to the onset of northeast monsoon precipitation. This... more
ABSTRACT Heavy rainfall over Malaysia occurs predominantly during the northeast monsoon season. Outbreaks of cold polar air over the South China Sea, known as cold surges, contribute to the onset of northeast monsoon precipitation. This study uses gridded reanalysis data from NCEP/NCAR Reanalysis Project 1 to calculate a cold surge index. This index is then compared with precipitation data for 4 surface stations from the World Monthly Surface Station Climatology (WMSSC) dataset. For Peninsular Malaysia, findings show that the cold surge index has the strongest inverse correlation with precipitation amounts at Kota Bharu and Kuantan stations from December to February (DJF). For the west coast of Sarawak, results for Kuching and Sibu stations show a similar inverse correlation from January to April (JFMA). The temporal difference suggests different cold surge flow types affecting each part of Malaysia. On the other hand, the similar inverse correlation relationship could imply that stronger southward-moving component of the cold surge winds bring heavier precipitation to both parts of Malaysia.
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Klang Valley is a focal area of Malaysian economic and business activities where the local weather condition is very important to maintain its reputation. Heavy rainfall for more than an hour was reported for up to 40 and 35 mm in... more
Klang Valley is a focal area of Malaysian economic and business activities where the local weather condition is very important to maintain its reputation. Heavy rainfall for more than an hour was reported for up to 40 and 35 mm in September and October 2013 respectively. Based on these cases, we investigated the water vapour, rainfall, surface meteorological data (surface pressure, relative humidity and temperature) and river water level. The precipitable water vapour (PWV) derived from Global Positioning System (GPS) was used to indicate the impact of the flash floods on the rainfall. We found that PWV dropped by 4 mm at 2 h before the rainfall reached 40 mm and dropped by 3 mm at 3 h before 35 mm of rainfall in the respective cases. The variation of PWV was higher for September as compared to October by about 2 mm. We suggest that rainfall phenomena can disturb GPS propagation and hence, the impact of PWV before, during and after the flash flood events at the three selected GPS st...
Seorang pelukis melakar grafiti bagi mengenang pesawat MH370 di Kuala Lumpur, baru-baru ini. -AGENSI OPERASI pencarian pesawat MH370 kini memasuki empat bulan selepas dinyatakan hilang pada 8 Mac lalu. Kehebatan pemberitaan di media massa... more
Seorang pelukis melakar grafiti bagi mengenang pesawat MH370 di Kuala Lumpur, baru-baru ini. -AGENSI OPERASI pencarian pesawat MH370 kini memasuki empat bulan selepas dinyatakan hilang pada 8 Mac lalu. Kehebatan pemberitaan di media massa telah berkurangan berbanding satu bulan pertama kehilangan pesawat tersebut. Sebelum kotak hitam pesawat Boeing 777-200ER berusia 11 tahun itu ditemukan, pakar-pakar dan penganalisis penerbangan serata dunia telah mengemukakan pelbagai teori dan kemungkinan kehilangannya. Antara punca yang banyak dikemukakan gabungan kesilapan teknikal dan juruterbang hingga membawa kesan-kesan kerosakan struktur, cuaca buruk, kegagalan elektrik pesawat dan faktor manusia (sabotaj dan rampasan). Selepas, Perdana Menteri, Datuk Seri Najib Tun Razak pada 15 Mac lalu mengeluarkan kenyataan bahawa pesawat MH370 berakhir di selatan Lautan Hindi, pencarian seterusnya tertumpu di antara dua koridor. Koridor utara -zon yang membentang dari Turkmenistan dan Kazakhstan serta...
ABSTRACT Accessibility and accurate estimation of the tropospheric delay plays a crucial role in meteorological studies and weather forecasts as well as improving positioning accuracy. We propose to employ an adaptive neuro fuzzy... more
ABSTRACT Accessibility and accurate estimation of the tropospheric delay plays a crucial role in meteorological studies and weather forecasts as well as improving positioning accuracy. We propose to employ an adaptive neuro fuzzy inference system (ANFIS) to build estimation and prediction models for zenith path delay (ZPD). Five selected stations over Antarctica were used to examine the applicability of ANFIS. GPS ZPD data of 2010 with five-minute resolution was used as the target output. A fuzzy clustering algorithm is adopted to enhance the performance of the models, which is able to minimize the number of membership functions and rules for better efficiency in the models. To investigate the accuracy of models developed, a combination of the surface pressure (P), temperature (T) and relative humidity (H) is performed to obtain the best estimation of ZPD. The results demonstrated that ANFIS models with three inputs network (P, T and H) agreed very well with ZPD obtained from GPS than separated input only coming from P or T, or P and T, or P and H. Finally, the input network (P, T and H) is selected in developing the ZPD predictive models. The prediction resulted from one-step to eight-step ahead development, demonstrated that the high-resolution of data used in training process will increase the accuracy of the predictive model.
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ABSTRACT The development of a real-time system to monitor the precipitable water vapor (PWV) using surface meteorological data as the input is reported in this paper. The PWV value is estimated using the, adaptive neuro fuzzy inference... more
ABSTRACT The development of a real-time system to monitor the precipitable water vapor (PWV) using surface meteorological data as the input is reported in this paper. The PWV value is estimated using the, adaptive neuro fuzzy inference system (ANFIS) model that was generated using the Matlab™ software. The input of the model was taken based on the data measured by the meteorological sensors (surface pressure, temperature and relative humidity) that was included in the system. The system is developed by using the LabVIEW program at the Universiti Kebangsaan Malaysia (UKM). The system has been tested and can be operated very well under windows based platform.
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ABSTRACT Klang Valley is a focal area of Malaysian economic and business activities where the local weather condition is very important to maintain its reputation. Heavy rainfalls for more than an hour were reported up to 40 mm in... more
ABSTRACT Klang Valley is a focal area of Malaysian economic and business activities where the local weather condition is very important to maintain its reputation. Heavy rainfalls for more than an hour were reported up to 40 mm in September 2013 and 35 mm in October 2013. Both events are monitored as the first and second cases of flash flood, respectively. Based on these cases, we investigate the water vapor, rainfall, surface meteorological data (surface pressure, relative humidity, and temperature) and river water level. The precipitable water vapor (PWV) derived from Global Positioning System (GPS) is used to indicate the impact of flash flood on the rainfall. We found that PWV was dropped 4 mm in 2 hours before rainfall reached to 40 mm and dropped 3 mm in 3 hours before 35 mm of rainfall in respective cases. Variation of PWV was higher in September case compared to October case of about 2 mm. We suggest the rainfall phenomena can disturb the GPS propagation and therefore, the impact of PWV before, during and after the flash flood event at three selected GPS stations in Klang Valley is investigated for possible mitigation in the future.
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ABSTRACT Space environment contained harmful radiation that posed risk to spacecraft orbiting the Earth. In this paper, we looked into radiation doses caused by galactic cosmic ray (GCR) towards satellites orbiting in low earth orbit... more
ABSTRACT Space environment contained harmful radiation that posed risk to spacecraft orbiting the Earth. In this paper, we looked into radiation doses caused by galactic cosmic ray (GCR) towards satellites orbiting in low earth orbit (LEO) near Earth's equator (NEqO) and compared them with doses caused by solar energetic particles (SEP) and trapped particles to determine the damage level of GCR. The radiation doses included linear energy transfer (LET) and nonionizing energy loss (NIEL) through a 1mm gallium arsenide (GaAs) planar geometry by using Space Environment Information System (SPENVIS) method. The orbital data followed Malaysian Razaksat satellite at 685km altitude and 9° inclination during selected solar minimum and solar maximum from solar cycles 21 to 24. We found that trapped particles gave the highest LET and no SEP was detected in SPENVIS. The LET values tend to be higher during solar minimum for trapped particles and GCR, corresponding to their anti-correlated fluxes with the solar activity. However, the NIEL values for GCR in solar cycle 23 did not follow the anti-correlation pattern.
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Highlights new findings in the field, in conjunction with the 2017 International Conference on Space Science and Communication (IconSpace2017), held in Kuala Lumpur, Malaysia on 3-5 May 2017
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Selepas setahun RazakSAT-1 dilancarkan dalam orbit bumi rendah (Low Earth Orbit – LEO) dan diletakkan di orbit berhampiran Khatulistiwa (Near Equatorial Orbit – NeqO), komunikasi satelit itu dinyatakan hilang dari stesen bumi dan tiada... more
Selepas setahun RazakSAT-1 dilancarkan dalam orbit bumi rendah (Low Earth Orbit – LEO) dan diletakkan di orbit berhampiran Khatulistiwa (Near Equatorial Orbit – NeqO), komunikasi satelit itu dinyatakan hilang dari stesen bumi dan tiada maklumat jelas yang dapat dinyatakan oleh pihak berkuasa. Banyak yang berspekulasi bahaya persekitaran angkasa adalah antara penyumbang kepada ketidaksempurnaan misi yang dijalankan oleh satelit ini. Ini memandangkan satelit di LEO-NEqo terdedah kepada zarah terperangkap dan tenaga tinggi kosmik galaksi yang tiada termodulat oleh matahari hingga menembus ke komponen dalaman elektronik. Buku ini menyentuh aspek apakah persekitaran angkasa mengganggu komunikasi operasi satelit RazakSAT-1 dalam tempoh misinya. Analisis dijalankan dengan menguji tiga zarah angkasa utama, iaitu sinar kosmik galeksi, zarah bertenaga suria, dan zarah terperangkap. Simulasi zarah angkasa dengan bahan satelit deorbit LEO-NEqO sepanjang misi ini dijalankan. Prestasi RazakSAT-1 juga dibandingkan dengan satelit lain yang mengorbit di LEO-NEqO dan polar. Buku ini diharap berguna sebagai rujukan kepada warga sainstis, penyelidik, profesional termasuk pemegang taruh dan ahli politik, mahasiswa/mahasiswi dan masyarakat umum dalam memahami persekitaran angkasa dan kesannya ke atas operasi satelit.
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This book addresses space science and communication – one of the main pillars of space science sustainability, an area that has recently become of great importance. In this regard, research and development play a crucial role in... more
This book addresses space science and communication – one of the main pillars of space science sustainability, an area that has recently become of great importance. In this regard, research and development play a crucial role in sustainability development. However, obtaining essential data in the physical world to interpret the universe and to predict what could happen in the future is a challenging undertaking. Accordingly, providing valid information to understand trends, evaluate needs, and create sustainable development policies and programs in the best interest of all the people is indispensable.
This book was prepared in conjunction with the fifth meeting of the 2017 International Conference on Space Science and Communication (IconSpace2017), held in Kuala Lumpur, Malaysia on 3-5 May 2017 to introduce graduate stuandents, researchers, lecturers, engineers, geospatialists, meteorologists, climatologists, astronomers and practitioners to the latest applications of space science, telecommunications, meteorology, remote sensing and related fields. The individual papers discuss a broad range of space science and technology applications, e.g. the formation of global warming from space, environmental and remote sensing, communication systems, and smart materials for space applications.
This book was prepared in conjunction with the fifth meeting of the 2017 International Conference on Space Science and Communication (IconSpace2017), held in Kuala Lumpur, Malaysia on 3-5 May 2017 to introduce graduate stuandents, researchers, lecturers, engineers, geospatialists, meteorologists, climatologists, astronomers and practitioners to the latest applications of space science, telecommunications, meteorology, remote sensing and related fields. The individual papers discuss a broad range of space science and technology applications, e.g. the formation of global warming from space, environmental and remote sensing, communication systems, and smart materials for space applications.
Research Interests:
My current and future objective job is in teaching and research development to enhance the visibility and establishing of a university. I am PhD in Electrical, Electronics and System Engineering with more than 17 years of teaching and... more
My current and future objective job is in teaching and research development to enhance the visibility and establishing of a university. I am PhD in Electrical, Electronics and System Engineering with more than 17 years of teaching and research experiences; targeting assignment as Full Professor.