[ Y101 ] Stability Criterion for Neutral Systems with Distributed Time-Varying Delays

Aornnatcha Janthayong 1, Jenjira Thipcha 1,* and Chanikan Emharuethai

ABSTRACT:

This paper investigates the delay dependent stability of neutral systems with distributed time-varying delays. Based on a suitable Lyapunov-Krasovskii functionals (LKFs) and integral inequality approach, the asymptotic stability condition is in terms of linear matrix in...  show all / hide

This paper investigates the delay dependent stability of neutral systems with distributed time-varying delays. Based on a suitable Lyapunov-Krasovskii functionals (LKFs) and integral inequality approach, the asymptotic stability condition is in terms of linear matrix inequities (LMIs), which gurantees stability for the systems.

 PDF    634  View

[ Y102 ] Prevalence of blood parasite infections in apparently healthy dogs in highland Chiang Mai, Thailand

Pennapa Takam 1, Wilawan Ruansit 1, Thipkamon Thikarach 1, Pichanan Suebsaard 1, Onanong Seng-Lao 1, Dante Fabros Jr. 1, Runjuan Isararuk 2, Phacharaporn Tadee 3, Phairot Phongkidakarn 3, Pattama Charerntantanakul 4, Chollada Sodarat5, Worapat Prachasilch

ABSTRACT:

Tick-borne diseases (TBDs) are health problem in dogs in tropical countries like Thailand. TBDs mostly found in dogs are babesiosis, hepatozoonosis and ehrlichiosis. In this study, we determined the prevalence of TBDs for dogs in highland Chiang Mai, Thailand using mult...  show all / hide

Tick-borne diseases (TBDs) are health problem in dogs in tropical countries like Thailand. TBDs mostly found in dogs are babesiosis, hepatozoonosis and ehrlichiosis. In this study, we determined the prevalence of TBDs for dogs in highland Chiang Mai, Thailand using multiplex polymerase chain reaction (mPCR) developed in our laboratory. Data were divided into two groups based on the availability of veterinary service in the distance of 10-30 kilometers. A total of 295 and 269 blood samples were collected from dogs in highland where veterinary service is absent or present, respectively. Dogs of the former group were singly infected with Hepatozoon canis (50.17%), co-infected with H. canis + Babesia canis (27.80%), H. canis + Ehrlichia canis (1.36%), or H. canis + B. canis + E. canis (0.34%). Dogs from the latter group were singly infected with B. canis (0.37%), H. canis (28.62%), E. canis (1.49%), co-infected with H. canis + B. canis (23.05%), H. canis + E. canis (1.49%), or H. canis + B. canis + E. canis (1.86%). Our findings suggest that H. canis infection is highly prevalent in apparently healthy dogs in highland Chiang Mai. Infection with B. canis alone is little but its co-infection with H. canis is rather common. The availability of veterinary service seemed to associate with reduced prevalence of infection, although most dogs did not receive routine veterinary care.

 PDF    237  View

[ Y103 ] Prevalence of blood parasite infections in native cattle in highland Chiang Mai, Thailand

Pennapa Takam 1, Wilawan Ruansit 1, Thipkamon Thikarach 1, Pichanan Suebsaard 1, Onanong Seng-Lao 1, Dante Fabros Jr. 1, Runjuan Isararuk 2, Phacharaporn Tadee 3, Phairot Phongkidakarn 3, Pattama Charerntantanakul 4 and Wasin Charerntantanakul 1,*

ABSTRACT:

Tick-borne diseases (TBDs) affect health status of beef cattle in Thailand. TBDs mostly found in beef cattle are anaplasmosis, theileriosis and trypanosomiasis. In this study, we determined the prevalence of TBDs for beef cattle in highland Chiang Mai, Thailand using mu...  show all / hide

Tick-borne diseases (TBDs) affect health status of beef cattle in Thailand. TBDs mostly found in beef cattle are anaplasmosis, theileriosis and trypanosomiasis. In this study, we determined the prevalence of TBDs for beef cattle in highland Chiang Mai, Thailand using multiplex polymerase chain reaction (mPCR) developed in our laboratory. Data were divided into two groups based on the availability of veterinary service in the distance of 10-30 kilometers. A total of 213 and 89 blood samples were collected from beef cattle in highland where veterinary service is absent or present, respectively. Native cattle of the former group were singly infected with Anaplasma marginale (13.62%), Theileria sp. (19.72%), and co-infected with A. marginale+Theileria sp. (57.75%). Native cattle from the latter group were singly infected with A. marginale (15.73%), Theileria sp. (17.98%), and co-infected with A. marginale+Theileria sp. (47.19%). Our findings suggest that Theileria sp. infection is highly prevalent in native cattle in highland Chiang Mai, followed by A. marginale infection. No Trypanosoma evansi infection was detected in either group. Most native cattle were co-infected with A. marginale and Theileria

 PDF    175  View

[ Y104 ] Development of natural dye based Dye-sensitized solar cell utilizing natural pigment from malabar spinach and red cabbage

Glennise Faye C. Mejica 1,2, Yuwalee Unpaprom 2,3, Ubonwan Subhasaen4, Thidarat Siriboon5 and, Rameshprabu Ramaraj2,3,*

ABSTRACT:

Dye-sensitized solar cell (DSSC) a new innovation of photovoltaic cell has gained popularity due to its inexpensive fabrication cost and promising potential to absorb light and convert it to electricity. For decades, the artificial dye has been employed as a photosensit...  show all / hide

Dye-sensitized solar cell (DSSC) a new innovation of photovoltaic cell has gained popularity due to its inexpensive fabrication cost and promising potential to absorb light and convert it to electricity. For decades, the artificial dye has been employed as a photosensitizer for dye-sensitized solar cells due to its performance output. In contrast, manufacturing such dyes undergoes complicated processes that involve the utilization of costly and harmful chemicals that poses a health risk and harmful to human and environment. Hence, the extraction of dyes or pigments from nature has been eyed for various researches that can be an alternative to artificial dyes as a photosensitizer for DSSC. Hence, this research investigates and evaluates natural dye utilization from the malabar spinach (MS) and red cabbage (RC) as a photosensitizer for DSSC. The experiment was conducted by using the solvent extraction method for the natural dye extraction; the doctor blade technique was adapted for the coating of TiO2 paste, while graphite was employed for the counter electrode material. The experimental results concluded the potential of natural dye from MS and RC to absorb light and produce electricity. The energy conversion efficiency of red cabbage and Malabar spinach-based DSSC was 0.16654% ± 0.00955 and 0.00231% ± 0.00079.

 PDF    375  View

[ Y105 ] Developing an AI-based, Low-cost Surveillance System for Experimental Fish Keeping

Dominik von La Roche 1, Pascal Bawidamann 2 and Dušan Palić 1,*

ABSTRACT:

Observation of fish behavior is a cornerstone of health assessment in research facilities. However, presence of humans can interfere with the fish normal behavior in different ways. In order to reduce opportunities for direct interactions of animals with humans in the l...  show all / hide

Observation of fish behavior is a cornerstone of health assessment in research facilities. However, presence of humans can interfere with the fish normal behavior in different ways. In order to reduce opportunities for direct interactions of animals with humans in the laboratory setting, and minimize such interferences, a remote non-invasive monitoring system was developed from low-cost components. The system was tested with zebrafish (Danyo rerio) in 50 L glass aquariums and one externally positioned webcam with visual field covering the entire aquarium volume. The series of images was recorded with RaspberryPi controlled webcams, and visual data evaluation was carried out via neural networks from the field of AI, based on Mask R-CNN framework. Positive fish detection of 95% was achieved, confirmed by human beings on a subset of over 3000 photographs. Furthermore, software was developed to automatically load images and display AI predictions. If the predictions are incorrect, the neural network detection can be further improved by means of a human correction.

 PDF    114  View

[ Y106 ] Emergence of antimicrobial resistance in aquatic acosystems – Veterinary and human medicine /Translational/ Concerns

Ksenija Aksentijević 1,*, Jelena Ašanin 2 and Dušan Palić 3

ABSTRACT:

Aquaculture is a rapidly growing industry that currently accounts for over half of the fishes used for human consumption worldwide. As the industry grows so does the amount of antibiotics used to prevent and treat bacterial infection. Excessive usage, abuse, or misuse o...  show all / hide

Aquaculture is a rapidly growing industry that currently accounts for over half of the fishes used for human consumption worldwide. As the industry grows so does the amount of antibiotics used to prevent and treat bacterial infection. Excessive usage, abuse, or misuse of antibiotics and disinfectans in aquaculture may cause the resistance in bacteria with the most important medical consequence of the loss of the antibiotic efficacy. There is also a possibility that the enrichment of resistant bacteria or genes encoding resistance could have an adverse impact on the use of antimicrobial agents to control diseases in humans and other land-based animals. The steps to be taken to prevent and reduce the use of antibiotics in aquaculture are: the use of vaccines whenever possible; introduction of specific biosecurity measures; development of specific monitoring programs to prevent or reduce possible disease outbreaks; development of production systems optimal with respect to water quality, oxygen levels and able to warrant the welfare of the reared animals. The long battle of antimicrobial resistance could be overcome by the sincere implementation of One Health approach.

 PDF    669  View

[ Y107 ] Comparison of an innovative porous pipe irrigation system to drip irrigation under controlled conditions

Alexander Kunze 1, Wolfram Spreer 2,* , Rapeephun Dangtungee 2, Chomchuan Boonrahong 2, Unchalee Sanguangpong 2 and Johannes F. J. Max 3

ABSTRACT:

With increasing water scarcity and irrigated agriculture being the biggest water consumer worldwide, water saving irrigation is important. So far, drip irrigation is the most water efficient way of irrigation, avoiding virtually all application losses, including drift, ...  show all / hide

With increasing water scarcity and irrigated agriculture being the biggest water consumer worldwide, water saving irrigation is important. So far, drip irrigation is the most water efficient way of irrigation, avoiding virtually all application losses, including drift, interception, evaporation and deep percolation. However, drip irrigation depends on the pressurized point source emission of water which produces a typical structure of different levels of water supply depending on the distance to the point source emission, creating gradients in spatial and temporal distribution of water and oxygen supply in the root zone. Porous pipes, in contrast, supply water all along the pipe with a very low pressure, resulting in the matric potential of the soil to be the main driving force for distribution of water in the soil. In the present study the suitability of an innovative porous pipe for subsurface irrigation of “Lollo Bionda” lettuce was tested and compared to a state-of-the-art drip irrigation system. Results show that with the porous pipe system 35% less water was used, while a 9% increase in total fresh biomass was measured, as compared to drip irrigation. This resulted in a significantly higher water use efficiency of 58 kg/m3 as compared to 34.4 kg/m3 under drip irrigation. The presented results were obtained under controlled conditions in a greenhouse during one cropping period only and must therefore considered as preliminary. More experiments both under protected cultivation and in open field conditions need to be carried out to confirm the massive water saving potential of porous pipes.

 PDF    1207  View

[ Y108 ] Model Development for Estimating Ground Level Particulate Matter For Central Thailand Using Satellite Data

Pichawan Phuengsamran1, and Pichnaree Lalitaporn1,*

ABSTRACT:

This study developed a model to estimate PM10and PM2.5 concentrations by using satellite data over central Thailand. Satellite data in this study using Moderate Resolution Imaging Spectroradiometer (MODIS) sensor on Terra satellites derived aerosol optical depths (AODs)...  show all / hide

This study developed a model to estimate PM10and PM2.5 concentrations by using satellite data over central Thailand. Satellite data in this study using Moderate Resolution Imaging Spectroradiometer (MODIS) sensor on Terra satellites derived aerosol optical depths (AODs) data 3-km and 10-km product, while daily ground PM10 and PM2.5 data in Thailand over 10 years (January 2008 – December 2018). A combination of various meteorological variables including temperature(T), relative humidity(RH), and wind speed(WS) were used, in conjunction with the Boundary layer height. The results of the study showed that PM10 and PM2.5 data collected from satellites were similar to ground-level data. The central region has the highest PM10 and PM2.5 concentrations in the period from November to April. Meteorological data showed that RH, T, and WS affected PM10and PM2.5 concentrations, while boundary layer height varied slightly for PM concentrations. Multiple Linear Regression models were used to find the relationship between PM10-AODs and PM2.5-AODs data. The model multiple linear regression can estimate 0.50 - 0.78 of PM10 and 0.39-0.70 of PM2.5. Furthermore,10-km products gave better correlations with PM10 and PM2.5 compared to 3-km products. A regressionmodel that averaged data from all 26 stations together for one equation could be used to estimate theamount of ground PM concentration.

 PDF    337  View

[ Y109 ] Capsaicinoid nonivamide attenuates accumulation of triglyceride in high fat diet induced obese rats

Kanokrada Tonpoo1, Jiraporn Tocharus2, Sivanan Sivasinprasasn1, Naruemon Wikan1, Waraluck Chaichompoo3, Apichart Suksamrarn3 and Chainarong Tocharus1

ABSTRACT:

Capsaicinoid nonivamide (PAVA) is found in the chili peppers. Chili can improve lipid metabolism and health-promoting. We aim to investigate the effect of capsaicinoid nonivamide of white adipose tissue in high-fat diet rats. Male Sprague- Dawley rats were given the hig...  show all / hide

Capsaicinoid nonivamide (PAVA) is found in the chili peppers. Chili can improve lipid metabolism and health-promoting. We aim to investigate the effect of capsaicinoid nonivamide of white adipose tissue in high-fat diet rats. Male Sprague- Dawley rats were given the high fat diet (HFD) to induce obesity and the another group were given the normal diet for 16 weeks, After that the rats were divided into 3 groups include normal diet (ND) group, HFD group, HFD+PAVA 1 mg/kg/day group for other 4 weeks. At the end of the experiment, PAVA group significantly decreased the body weight, body weight gains compared the high-fat group. In addition, a group of treatment in PAVA has shown that it can reduce the fat accumulation by decreasing white adipose tissue mass, adipocytes size and also triglyceride (TG) content of white adipose tissue. Furthermore, all of these results suggest that group of treatment in PAVA that can anti-obesity through suppression of body weight gain reduction of white adipose tissue mass in high fat diet induced obese rats.

 PDF    264  View

[ Y110 ] Electrochemical uric acid sensor based on GO modified glassy carbon electrode

Anchana Preechaworapun1*, Pimporn Manochai2, Baikran Klinumpan1, Kulwadee Pinwattana1, Rapiphun Janmanee1, Pornpat Sam-ang1, Sudarat Khadsai3, and Tanin Tangkuaram2

ABSTRACT:

Electrochemical uric acid sensor was developed using graphene oxide (GO) modified glassy carbon electrode (GCE) by cyclic voltammetry. The GO was characterized by scanning electron microscope (SEM), and Fourier Transform Infrared Spectrophotometer (FT-IR). The uric ac...  show all / hide

Electrochemical uric acid sensor was developed using graphene oxide (GO) modified glassy carbon electrode (GCE) by cyclic voltammetry. The GO was characterized by scanning electron microscope (SEM), and Fourier Transform Infrared Spectrophotometer (FT-IR). The uric acid sensor has been analyzed by cyclic voltammetry and amperometry. The oxidation peak was appeared good electrocatalytic activity for uric acid at +0.50 V in phosphate buffer solution (pH 7.0). Linear relationship between the concentration of uric acid and oxidation peak currents was observed for two concentration ranges of 2-610 μM and 0.69-1.37 mM by amperometric technique. The methode can be apply to urine sample in the future and hopeful applications in diseases diagnosis.

 PDF    700  View