K Jaroensutasinee | Walailak University (original) (raw)

Papers by K Jaroensutasinee

To develop a process of extracting pixel values over the using of satellite remote sensing image ... more To develop a process of extracting pixel values over the using of satellite remote sensing image data in Thailand. It is a very important and effective method of forecasting rainfall. This paper presents an approach for forecasting a possible rainfall area based on pixel values from remote sensing satellite images. First, a method uses an automatic extraction process of the pixel value data from the satellite image sequence. Then, a data process is designed to enable the inference of correlations between pixel value and possible rainfall occurrences. The result, when we have a high averaged pixel value of daily water vapor data, we will also have a high amount of daily rainfall. This suggests that the amount of averaged pixel values can be used as an indicator of raining events. There are some positive associations between pixel values of daily water vapor images and the amount of daily rainfall at each rain-gauge station throughout Thailand. The proposed approach was proven to be a...

This study investigated the seasonal prevalence of Aedes aegypti and Ae. albopictus larvae in thr... more This study investigated the seasonal prevalence of Aedes aegypti and Ae. albopictus larvae in three topographical areas (i.e. mangrove, rice paddy and mountainous areas). Samples were collected from 300 households in both wet and dry seasons in nine districts in Nakhon Si Thammarat province. Ae. aegypti and Ae. albopictus were found in 21 out of 29 types of water containers in mangrove, rice paddy and mountainous areas. Ae. aegypti and Ae. albopictus laid eggs in different container types depending on season and topographical areas. Ae. aegypti larvae were found most in metal box in mangrove and mountainous areas in wet season. Ae. albopictus larvae were also found most in metal box in mangrove and mountainous areas in both wet and dry seasons. All Ae. albopictus larval indices were higher than Ae. aegypti larval indices in all three topographical areas and both seasons. HI and BI did not differ in three topographical areas but differed between Aedes sp. HI for both Ae. aegypti and ...

Water quality and freshwater fish diversity from nine waterfalls at Khao Luang National Park, Tha... more Water quality and freshwater fish diversity from nine waterfalls at Khao Luang National Park, Thailand was examined. Streams were shallow, fast flowing with clear water and rocky and sandy substrate. The mean water quality of waterfalls at Khao Luang National Park were as following pH 7.50, air temperature 24.27 °C, water temperature 26.37 °C, dissolved oxygen 7.88 mg/l, hardness 4.44-21.33 mg/l, alkalinity 3.55-11.88 mg/(as CaCO3). Twenty fish species were found at Khao Luang National Park belonging to nine families. A cluster analysis of water quality at Khao Luang National Park revealed that waterfalls at Khao Luang National Park were divided into two groups: A and B. Group A composed of two waterfalls (i.e. Aie Kaew and Wangmaipak) that flew to the Gulf of Thailand side. Group B composed of seven waterfalls (i.e. Promlok, Kalom, Nuafa, Suankun, Soidaw, Suanhai, and Thapae) that flew to the Andaman Sea side (Fig. 2) .The Cyprinids represented the major species in all the waterfal...

National Biodiversity Database System (NBIDS) has been developed for collecting Thai biodiversity... more National Biodiversity Database System (NBIDS) has been developed for collecting Thai biodiversity data. The goal of this project is to provide advanced tools for querying, analyzing, modeling, and visualizing patterns of species distribution for researchers and scientists. NBIDS data record two types of datasets: biodiversity data and environmental data. Biodiversity data are specie presence data and species status. The attributes of biodiversity data can be further classified into two groups: universal and projectspecific attributes. Universal attributes are attributes that are common to all of the records, e.g. X/Y coordinates, year, and collector name. Project-specific attributes are attributes that are unique to one or a few projects, e.g., flowering stage. Environmental data include atmospheric data, hydrology data, soil data, and land cover data collecting by using GLOBE protocols. We have developed webbased tools for data entry. Google Earth KML and ArcGIS were used as tools ...

This work investigated the phenology of Parah tree (Elateriospermum tapos) using the General Purp... more This work investigated the phenology of Parah tree (Elateriospermum tapos) using the General Purpose Atmosphere Plant Soil Simulator (GAPS model) to determine the amount of Plant Available Water (PAW) in the soil. We found the correlation between PAW and the timing of budburst and flower burst at Khao Nan National Park, Nakhon Si Thammarat, Thailand. PAW from the GAPS model can be used as an indicator of soil water stress. The low amount of PAW may lead to leaf shedding in Parah trees.

A flow line computational technique based on the D8 method using Mathematica was developed. The t... more A flow line computational technique based on the D8 method using Mathematica was developed. The technique was applied to Ron Phibun area, Nakhon Si Thammarat Province. This area is highly contaminated with arsenic 3 and 5. It was found that the technique using Mathematica can produce similar results to those obtained from GRASS v 5.0.2.

We developed a new method based on quasimolecular modeling to simulate the cavity flow in three c... more We developed a new method based on quasimolecular modeling to simulate the cavity flow in three cavity shapes: rectangular, half-circular and bucket beer in cgs units. Each quasi-molecule was a group of particles that interacted in a fashion entirely analogous to classical Newtonian molecular interactions. When a cavity flow was simulated, the instantaneous velocity vector fields were obtained by using an inverse distance weighted interpolation method. In all three cavity shapes, fluid motion was rotated counter-clockwise. The velocity vector fields of the three cavity shapes showed a primary vortex located near the upstream corners at time t ~ 0.500 s, t ~ 0.450 s and t ~ 0.350 s, respectively. The configurational kinetic energy of the cavities increased as time increased until the kinetic energy reached a maximum at time t ~ 0.02 s and, then, the kinetic energy decreased as time increased. The rectangular cavity system showed the lowest kinetic energy, while the half-circular cavi...

This study investigated the pattern and seasonal index of influenza cases in Thailand. Our result... more This study investigated the pattern and seasonal index of influenza cases in Thailand. Our results showed that southern Thailand had the highest influenza incidence among the four regions of Thailand (i.e. north, northeast, central and southern Thailand). The influenza pattern in southern Thailand was similar to that of northeastern Thailand. Seasonal index values of influenza cases in Thailand were higher in the hot season than in the wet season. Influenza cases started to increase at the beginning of the hot season (April), reached a maximum in August, rapidly declined in the middle of the wet season and reached the lowest value in December. Seasonal index values for northern Thailand differed from other regions of Thailand.

This study investigated the climatic factors associated with Influenza incidence in Nakhon Si Tha... more This study investigated the climatic factors associated with Influenza incidence in Nakhon Si Thammarat, Southern Thailand. Climatic factors comprised of the amount of rainfall, percent of rainy days, relative humidity, wind speed, maximum, minimum temperatures and temperature difference. A multiple stepwise regression technique was used to fit the statistical model. The result showed that the temperature difference and percent of rainy days were positively associated with Influenza incidence in Nakhon Si Thammarat.

This study investigated the number of Aedes larvae, the key breeding sites of Aedes sp., and the ... more This study investigated the number of Aedes larvae, the key breeding sites of Aedes sp., and the relationship between climatic factors and the incidence of DHF in Samui Islands. We conducted our questionnaire and larval surveys from randomly selected 105 households in Samui Islands in July-September 2006. Pearson-s correlation coefficient was used to explore the primary association between the DHF incidence and all climatic factors. Multiple stepwise regression technique was then used to fit the statistical model. The results showed that the positive indoor containers were small jars, cement tanks, and plastic tanks. The positive outdoor containers were small jars, cement tanks, plastic tanks, used cans, tires, plastic bottles, discarded objects, pot saucers, plant pots, and areca husks. All Ae. albopictus larval indices (i.e., CI, HI, and BI) were higher than Ae. aegypti larval indices in this area. These larval indices were higher than WHO standard. This indicated a high risk of D...

This study investigated climatic factors associated with influenza cases in Southern Thailand. Th... more This study investigated climatic factors associated with influenza cases in Southern Thailand. The main aim for use regression analysis to investigate possible causual relationship of climatic factors and variability between the border of the Andaman Sea and the Gulf of Thailand. Southern Thailand had the highest Influenza incidences among four regions (i.e. north, northeast, central and southern Thailand). In this study, there were 14 climatic factors: mean relative humidity, maximum relative humidity, minimum relative humidity, rainfall, rainy days, daily maximum rainfall, pressure, maximum wind speed, mean wind speed, sunshine duration, mean temperature, maximum temperature, minimum temperature, and temperature difference (i.e. maximum – minimum temperature). Multiple stepwise regression technique was used to fit the statistical model. The results indicated that the mean wind speed and the minimum relative humidity were positively associated with the number of influenza cases on ...

OCEANS'11 MTS/IEEE KONA, 2011

ABSTRACT There is an increasing focus on implementing ocean observing systems to deliver informat... more ABSTRACT There is an increasing focus on implementing ocean observing systems to deliver information about how coastal systems are responding to change in the oceans. While advances are being made in collecting data, from automated sensors, sensor networks and so on, the same advances have yet to be made in the analysis and extraction of information from the data collected. There are advances in computing, modeling and visualization that can help but these require a new paradigm in how the observational data is stored, accessed and managed. This paper describes a services based cloud-computing architecture for the storage, integration and analysis of marine observational data from two observing systems; one on the Great Barrier Reef in Australia, the other near Phuket in Thailand.

Journal of Environmental Biology, 2018

Seed predation and dispersal by scatter-hoarding rodents are important for plant population dynam... more Seed predation and dispersal by scatter-hoarding rodents are important for plant population dynamics and forest structure. In this study, the potential of red spiny rats () as predators, dispersers and scatter-hoarders of Parah () seeds was examined in Khao Nan National Park, Thailand. One thousand Parah seeds and 100 rats were used in this experiment. Ten seeds with one rat were set inside a cage. Infrared videos of seed predation and dispersal by the rats were made from 9:00-10:00 p.m. afterwards, the numbers of seeds predated (predated, undamaged, and partially predated), dispersed (non-removed, displaced and removed) and scatter-hoarded were recorded. The percentage of undamaged, predated and partially predated seeds, as well as of removed, non-removed, and displaced seeds differed significantly. In both males and females, most of the seeds were undamaged, followed by those predated and partially predated. Additionally, most of the seeds were not removed, followed by those removed and displaced. Both males (35%) and females (37%) scatterhoarded seeds, and the seed numbers did not differ between sexes. Body weight of rats was positively correlated with the percentage of predated seeds and negatively correlated with the percentage of undamaged seeds, but not with the potentially viable, non-removed, displaced, or removed seeds. Red spiny rats act as predators, dispersers and scatter-hoarders of Parah seeds. It indicates that these rats may play an important role in Parah population dynamics.

Present article is a review on wireless sensor technology and application for ocean observation. ... more Present article is a review on wireless sensor technology and application for ocean observation. A variety of tools and sensors are widely used for recording and watching online marine physical parameters such as sea temperature, salinity and pH value. An information system is deployed for surveillance and early warning systems for ecologists. These systems are user-friendly and accessible. All information is useful for ecological and environmental assessment. Data are collected at the study sites with a variety of online real-time sensors at various locations around the world.

This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data o... more This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data on monthly-notified cases of dengue fever, over the period of January 1981- May 2014 were collected from the Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health. Weather data over the period of January 2007-May 2014 were obtained from the Thai Meteorological Department. Box and whisker plots were used to study the spatial temporal patterns of dengue incidence. Spearman correlation analysis and time-series adjusted Poisson regression analysis were performed to quantify the relationship between weather and the number of dengue cases. The results show that the highest dengue cases occurred in July in the Gulf of Thailand. Conversely, for the Andaman Sea, the highest dengue cases occurred in June in Phang-Nga, Phuket and Ranong provinces. Only Krabi province had the most dengue cases occurring in July. When we compared dengue transmission duration between the Anda...

This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data o... more This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data on monthly-notified cases of dengue fever, over the period of January 1981May 2014 were collected from the Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health. Weather data over the period of January 2007-May 2014 were obtained from the Thai Meteorological Department. Box and whisker plots were used to study the spatial temporal patterns of dengue incidence. Spearman correlation analysis and time-series adjusted Poisson regression analysis were performed to quantify the relationship between weather and the number of dengue cases. The results show that the highest dengue cases occurred in July in the Gulf of Thailand. Conversely, for the Andaman Sea, the highest dengue cases occurred in June in Phang-Nga, Phuket and Ranong provinces. Only Krabi province had the most dengue cases occurring in July. When we compared dengue transmission duration between the Andama...

Behaviour, 2018

We tested for the first time how Austruca bengali Crane, 1975 signaller males adjusted their wavi... more We tested for the first time how Austruca bengali Crane, 1975 signaller males adjusted their waving rates based on receiver female body sizes and their distances. We video recorded the waving display of 46 males (9–12 mm carapace width) for 30 s, and counted their waving rate. Receiver females were categorised as small (8–10 mm carapace width) and large (>10 mm). Distances between males and females were categorised as short (⩽12 cm) and long (>12 cm) distances. Our results indicate that males are able to measure distances and female sizes, and adjust their waving display by actively reducing waving rate (1) towards small females, as usually small females have lower fecundity compared to large ones and (2) towards females at very close distance because at this point, the females would make their mating decision, and thus males start to lead/hit the females towards their burrow rather than waving vigorously.

Walailak Journal of Science and Technology, 2011

We developed a method based on quasi-molecular modelling to simulate the fall of water drops. Eac... more We developed a method based on quasi-molecular modelling to simulate the fall of water drops. Each quasimolecule was a group of particles that interacted in a fashion entirely analogous to classical Newtonian molecular interactions. When a falling water droplet was simulated at low impact velocity, the droplets moved periodically (i.e. the droplets moved up and down for a certain period, then stopped moving and reached a steady state), spreading and recoiling without splash or break-up. Spreading rates of falling water droplets increased rapidly as time increased until the spreading rate reached its steady state at time t ~ 0.4 s after the impact. The droplet height above the surface decreased as time increased, remained constant after the droplet diameter attained a maximum value and reached its steady state at time t ~ 0.4 s after the impact. When impact velocities were varied by changing the setting of the vertical height (i.e. at 0.25, 1.25 and 6.00 cm), spreading rates increased with increasing impact velocity. However, the droplet height above the surface was not affected by increasing impact velocity.

A univariate time-series analysis method has been used to model and forecast the monthly number o... more A univariate time-series analysis method has been used to model and forecast the monthly number of dengue haemorrhagic fever (DHF) cases in southern Thailand. We developed autoregressive integrated moving average (ARIMA) models on the data collected between 1994-2005 and then validated the models using the data collected between January-August 2006. The results showed that the regressive forecast curves were consistent

2012 Oceans - Yeosu, 2012

ABSTRACT Business Intelligent tools for the Coral Database System were developed to provide publi... more ABSTRACT Business Intelligent tools for the Coral Database System were developed to provide publicly accessible scientific data for researching environmental changes on coral reefs. The Coral Database System was established for long-term monitoring of the coral ecological system. Here we describe the web database system used for acquiring and sharing numerical data and imagery with ecological researchers that has been deployed at five sites: (1) Racha Islands, Phuket; (2) Phi Phi Island, Krabi; (3) Hin Pae and Ngam Noi Island, Chumphon; (4) Tan Island, Suratthani; (5) Sinmana farm, Suratthani. Realtime-online data - i.e. underwater sensor, meteorological data, underwater and beach Ecocam - and offline data - i.e. light/temp underwater sensors - were visualized and available online at URL http://www.twibl.org/coraldb. The services are based on Java and Java Server Page technology (JSP), on Google Maps technology for mapping and GIS, webMathematica for data analysis, and visualization, social web application videos and Open Source Data Turbine for data integration for real-time data. The highly visual and interactive system should prove valuable for coral research, education, and public awareness purposes. This realtime online system provides a useful tool for sustainable use of coral data resources in long-term monitoring of coral conservation and management.

To develop a process of extracting pixel values over the using of satellite remote sensing image ... more To develop a process of extracting pixel values over the using of satellite remote sensing image data in Thailand. It is a very important and effective method of forecasting rainfall. This paper presents an approach for forecasting a possible rainfall area based on pixel values from remote sensing satellite images. First, a method uses an automatic extraction process of the pixel value data from the satellite image sequence. Then, a data process is designed to enable the inference of correlations between pixel value and possible rainfall occurrences. The result, when we have a high averaged pixel value of daily water vapor data, we will also have a high amount of daily rainfall. This suggests that the amount of averaged pixel values can be used as an indicator of raining events. There are some positive associations between pixel values of daily water vapor images and the amount of daily rainfall at each rain-gauge station throughout Thailand. The proposed approach was proven to be a...

This study investigated the seasonal prevalence of Aedes aegypti and Ae. albopictus larvae in thr... more This study investigated the seasonal prevalence of Aedes aegypti and Ae. albopictus larvae in three topographical areas (i.e. mangrove, rice paddy and mountainous areas). Samples were collected from 300 households in both wet and dry seasons in nine districts in Nakhon Si Thammarat province. Ae. aegypti and Ae. albopictus were found in 21 out of 29 types of water containers in mangrove, rice paddy and mountainous areas. Ae. aegypti and Ae. albopictus laid eggs in different container types depending on season and topographical areas. Ae. aegypti larvae were found most in metal box in mangrove and mountainous areas in wet season. Ae. albopictus larvae were also found most in metal box in mangrove and mountainous areas in both wet and dry seasons. All Ae. albopictus larval indices were higher than Ae. aegypti larval indices in all three topographical areas and both seasons. HI and BI did not differ in three topographical areas but differed between Aedes sp. HI for both Ae. aegypti and ...

Water quality and freshwater fish diversity from nine waterfalls at Khao Luang National Park, Tha... more Water quality and freshwater fish diversity from nine waterfalls at Khao Luang National Park, Thailand was examined. Streams were shallow, fast flowing with clear water and rocky and sandy substrate. The mean water quality of waterfalls at Khao Luang National Park were as following pH 7.50, air temperature 24.27 °C, water temperature 26.37 °C, dissolved oxygen 7.88 mg/l, hardness 4.44-21.33 mg/l, alkalinity 3.55-11.88 mg/(as CaCO3). Twenty fish species were found at Khao Luang National Park belonging to nine families. A cluster analysis of water quality at Khao Luang National Park revealed that waterfalls at Khao Luang National Park were divided into two groups: A and B. Group A composed of two waterfalls (i.e. Aie Kaew and Wangmaipak) that flew to the Gulf of Thailand side. Group B composed of seven waterfalls (i.e. Promlok, Kalom, Nuafa, Suankun, Soidaw, Suanhai, and Thapae) that flew to the Andaman Sea side (Fig. 2) .The Cyprinids represented the major species in all the waterfal...

National Biodiversity Database System (NBIDS) has been developed for collecting Thai biodiversity... more National Biodiversity Database System (NBIDS) has been developed for collecting Thai biodiversity data. The goal of this project is to provide advanced tools for querying, analyzing, modeling, and visualizing patterns of species distribution for researchers and scientists. NBIDS data record two types of datasets: biodiversity data and environmental data. Biodiversity data are specie presence data and species status. The attributes of biodiversity data can be further classified into two groups: universal and projectspecific attributes. Universal attributes are attributes that are common to all of the records, e.g. X/Y coordinates, year, and collector name. Project-specific attributes are attributes that are unique to one or a few projects, e.g., flowering stage. Environmental data include atmospheric data, hydrology data, soil data, and land cover data collecting by using GLOBE protocols. We have developed webbased tools for data entry. Google Earth KML and ArcGIS were used as tools ...

This work investigated the phenology of Parah tree (Elateriospermum tapos) using the General Purp... more This work investigated the phenology of Parah tree (Elateriospermum tapos) using the General Purpose Atmosphere Plant Soil Simulator (GAPS model) to determine the amount of Plant Available Water (PAW) in the soil. We found the correlation between PAW and the timing of budburst and flower burst at Khao Nan National Park, Nakhon Si Thammarat, Thailand. PAW from the GAPS model can be used as an indicator of soil water stress. The low amount of PAW may lead to leaf shedding in Parah trees.

A flow line computational technique based on the D8 method using Mathematica was developed. The t... more A flow line computational technique based on the D8 method using Mathematica was developed. The technique was applied to Ron Phibun area, Nakhon Si Thammarat Province. This area is highly contaminated with arsenic 3 and 5. It was found that the technique using Mathematica can produce similar results to those obtained from GRASS v 5.0.2.

We developed a new method based on quasimolecular modeling to simulate the cavity flow in three c... more We developed a new method based on quasimolecular modeling to simulate the cavity flow in three cavity shapes: rectangular, half-circular and bucket beer in cgs units. Each quasi-molecule was a group of particles that interacted in a fashion entirely analogous to classical Newtonian molecular interactions. When a cavity flow was simulated, the instantaneous velocity vector fields were obtained by using an inverse distance weighted interpolation method. In all three cavity shapes, fluid motion was rotated counter-clockwise. The velocity vector fields of the three cavity shapes showed a primary vortex located near the upstream corners at time t ~ 0.500 s, t ~ 0.450 s and t ~ 0.350 s, respectively. The configurational kinetic energy of the cavities increased as time increased until the kinetic energy reached a maximum at time t ~ 0.02 s and, then, the kinetic energy decreased as time increased. The rectangular cavity system showed the lowest kinetic energy, while the half-circular cavi...

This study investigated the pattern and seasonal index of influenza cases in Thailand. Our result... more This study investigated the pattern and seasonal index of influenza cases in Thailand. Our results showed that southern Thailand had the highest influenza incidence among the four regions of Thailand (i.e. north, northeast, central and southern Thailand). The influenza pattern in southern Thailand was similar to that of northeastern Thailand. Seasonal index values of influenza cases in Thailand were higher in the hot season than in the wet season. Influenza cases started to increase at the beginning of the hot season (April), reached a maximum in August, rapidly declined in the middle of the wet season and reached the lowest value in December. Seasonal index values for northern Thailand differed from other regions of Thailand.

This study investigated the climatic factors associated with Influenza incidence in Nakhon Si Tha... more This study investigated the climatic factors associated with Influenza incidence in Nakhon Si Thammarat, Southern Thailand. Climatic factors comprised of the amount of rainfall, percent of rainy days, relative humidity, wind speed, maximum, minimum temperatures and temperature difference. A multiple stepwise regression technique was used to fit the statistical model. The result showed that the temperature difference and percent of rainy days were positively associated with Influenza incidence in Nakhon Si Thammarat.

This study investigated the number of Aedes larvae, the key breeding sites of Aedes sp., and the ... more This study investigated the number of Aedes larvae, the key breeding sites of Aedes sp., and the relationship between climatic factors and the incidence of DHF in Samui Islands. We conducted our questionnaire and larval surveys from randomly selected 105 households in Samui Islands in July-September 2006. Pearson-s correlation coefficient was used to explore the primary association between the DHF incidence and all climatic factors. Multiple stepwise regression technique was then used to fit the statistical model. The results showed that the positive indoor containers were small jars, cement tanks, and plastic tanks. The positive outdoor containers were small jars, cement tanks, plastic tanks, used cans, tires, plastic bottles, discarded objects, pot saucers, plant pots, and areca husks. All Ae. albopictus larval indices (i.e., CI, HI, and BI) were higher than Ae. aegypti larval indices in this area. These larval indices were higher than WHO standard. This indicated a high risk of D...

This study investigated climatic factors associated with influenza cases in Southern Thailand. Th... more This study investigated climatic factors associated with influenza cases in Southern Thailand. The main aim for use regression analysis to investigate possible causual relationship of climatic factors and variability between the border of the Andaman Sea and the Gulf of Thailand. Southern Thailand had the highest Influenza incidences among four regions (i.e. north, northeast, central and southern Thailand). In this study, there were 14 climatic factors: mean relative humidity, maximum relative humidity, minimum relative humidity, rainfall, rainy days, daily maximum rainfall, pressure, maximum wind speed, mean wind speed, sunshine duration, mean temperature, maximum temperature, minimum temperature, and temperature difference (i.e. maximum – minimum temperature). Multiple stepwise regression technique was used to fit the statistical model. The results indicated that the mean wind speed and the minimum relative humidity were positively associated with the number of influenza cases on ...

OCEANS'11 MTS/IEEE KONA, 2011

ABSTRACT There is an increasing focus on implementing ocean observing systems to deliver informat... more ABSTRACT There is an increasing focus on implementing ocean observing systems to deliver information about how coastal systems are responding to change in the oceans. While advances are being made in collecting data, from automated sensors, sensor networks and so on, the same advances have yet to be made in the analysis and extraction of information from the data collected. There are advances in computing, modeling and visualization that can help but these require a new paradigm in how the observational data is stored, accessed and managed. This paper describes a services based cloud-computing architecture for the storage, integration and analysis of marine observational data from two observing systems; one on the Great Barrier Reef in Australia, the other near Phuket in Thailand.

Journal of Environmental Biology, 2018

Seed predation and dispersal by scatter-hoarding rodents are important for plant population dynam... more Seed predation and dispersal by scatter-hoarding rodents are important for plant population dynamics and forest structure. In this study, the potential of red spiny rats () as predators, dispersers and scatter-hoarders of Parah () seeds was examined in Khao Nan National Park, Thailand. One thousand Parah seeds and 100 rats were used in this experiment. Ten seeds with one rat were set inside a cage. Infrared videos of seed predation and dispersal by the rats were made from 9:00-10:00 p.m. afterwards, the numbers of seeds predated (predated, undamaged, and partially predated), dispersed (non-removed, displaced and removed) and scatter-hoarded were recorded. The percentage of undamaged, predated and partially predated seeds, as well as of removed, non-removed, and displaced seeds differed significantly. In both males and females, most of the seeds were undamaged, followed by those predated and partially predated. Additionally, most of the seeds were not removed, followed by those removed and displaced. Both males (35%) and females (37%) scatterhoarded seeds, and the seed numbers did not differ between sexes. Body weight of rats was positively correlated with the percentage of predated seeds and negatively correlated with the percentage of undamaged seeds, but not with the potentially viable, non-removed, displaced, or removed seeds. Red spiny rats act as predators, dispersers and scatter-hoarders of Parah seeds. It indicates that these rats may play an important role in Parah population dynamics.

Present article is a review on wireless sensor technology and application for ocean observation. ... more Present article is a review on wireless sensor technology and application for ocean observation. A variety of tools and sensors are widely used for recording and watching online marine physical parameters such as sea temperature, salinity and pH value. An information system is deployed for surveillance and early warning systems for ecologists. These systems are user-friendly and accessible. All information is useful for ecological and environmental assessment. Data are collected at the study sites with a variety of online real-time sensors at various locations around the world.

This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data o... more This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data on monthly-notified cases of dengue fever, over the period of January 1981- May 2014 were collected from the Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health. Weather data over the period of January 2007-May 2014 were obtained from the Thai Meteorological Department. Box and whisker plots were used to study the spatial temporal patterns of dengue incidence. Spearman correlation analysis and time-series adjusted Poisson regression analysis were performed to quantify the relationship between weather and the number of dengue cases. The results show that the highest dengue cases occurred in July in the Gulf of Thailand. Conversely, for the Andaman Sea, the highest dengue cases occurred in June in Phang-Nga, Phuket and Ranong provinces. Only Krabi province had the most dengue cases occurring in July. When we compared dengue transmission duration between the Anda...

This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data o... more This study explored the spatio-temporal patterns of dengue infection in southern Thailand. Data on monthly-notified cases of dengue fever, over the period of January 1981May 2014 were collected from the Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health. Weather data over the period of January 2007-May 2014 were obtained from the Thai Meteorological Department. Box and whisker plots were used to study the spatial temporal patterns of dengue incidence. Spearman correlation analysis and time-series adjusted Poisson regression analysis were performed to quantify the relationship between weather and the number of dengue cases. The results show that the highest dengue cases occurred in July in the Gulf of Thailand. Conversely, for the Andaman Sea, the highest dengue cases occurred in June in Phang-Nga, Phuket and Ranong provinces. Only Krabi province had the most dengue cases occurring in July. When we compared dengue transmission duration between the Andama...

Behaviour, 2018

We tested for the first time how Austruca bengali Crane, 1975 signaller males adjusted their wavi... more We tested for the first time how Austruca bengali Crane, 1975 signaller males adjusted their waving rates based on receiver female body sizes and their distances. We video recorded the waving display of 46 males (9–12 mm carapace width) for 30 s, and counted their waving rate. Receiver females were categorised as small (8–10 mm carapace width) and large (>10 mm). Distances between males and females were categorised as short (⩽12 cm) and long (>12 cm) distances. Our results indicate that males are able to measure distances and female sizes, and adjust their waving display by actively reducing waving rate (1) towards small females, as usually small females have lower fecundity compared to large ones and (2) towards females at very close distance because at this point, the females would make their mating decision, and thus males start to lead/hit the females towards their burrow rather than waving vigorously.

Walailak Journal of Science and Technology, 2011

We developed a method based on quasi-molecular modelling to simulate the fall of water drops. Eac... more We developed a method based on quasi-molecular modelling to simulate the fall of water drops. Each quasimolecule was a group of particles that interacted in a fashion entirely analogous to classical Newtonian molecular interactions. When a falling water droplet was simulated at low impact velocity, the droplets moved periodically (i.e. the droplets moved up and down for a certain period, then stopped moving and reached a steady state), spreading and recoiling without splash or break-up. Spreading rates of falling water droplets increased rapidly as time increased until the spreading rate reached its steady state at time t ~ 0.4 s after the impact. The droplet height above the surface decreased as time increased, remained constant after the droplet diameter attained a maximum value and reached its steady state at time t ~ 0.4 s after the impact. When impact velocities were varied by changing the setting of the vertical height (i.e. at 0.25, 1.25 and 6.00 cm), spreading rates increased with increasing impact velocity. However, the droplet height above the surface was not affected by increasing impact velocity.

A univariate time-series analysis method has been used to model and forecast the monthly number o... more A univariate time-series analysis method has been used to model and forecast the monthly number of dengue haemorrhagic fever (DHF) cases in southern Thailand. We developed autoregressive integrated moving average (ARIMA) models on the data collected between 1994-2005 and then validated the models using the data collected between January-August 2006. The results showed that the regressive forecast curves were consistent

2012 Oceans - Yeosu, 2012

ABSTRACT Business Intelligent tools for the Coral Database System were developed to provide publi... more ABSTRACT Business Intelligent tools for the Coral Database System were developed to provide publicly accessible scientific data for researching environmental changes on coral reefs. The Coral Database System was established for long-term monitoring of the coral ecological system. Here we describe the web database system used for acquiring and sharing numerical data and imagery with ecological researchers that has been deployed at five sites: (1) Racha Islands, Phuket; (2) Phi Phi Island, Krabi; (3) Hin Pae and Ngam Noi Island, Chumphon; (4) Tan Island, Suratthani; (5) Sinmana farm, Suratthani. Realtime-online data - i.e. underwater sensor, meteorological data, underwater and beach Ecocam - and offline data - i.e. light/temp underwater sensors - were visualized and available online at URL http://www.twibl.org/coraldb. The services are based on Java and Java Server Page technology (JSP), on Google Maps technology for mapping and GIS, webMathematica for data analysis, and visualization, social web application videos and Open Source Data Turbine for data integration for real-time data. The highly visual and interactive system should prove valuable for coral research, education, and public awareness purposes. This realtime online system provides a useful tool for sustainable use of coral data resources in long-term monitoring of coral conservation and management.