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Experimental studies on thermal and flow resistance behaviors of turbulent flow through a heat exchanger tube with conical-diffuser inserts
In this research, an experimental investigation of the thermal and flow friction characteristics of tubular heat exchanger (HE) for single-phase forced convective flow with conical-diffuser inserted in the inner tube was performed. The aim of using the conical-diffuser is to create vortex flows…
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Complex Relative Permittivity Measurement Techniques
This article presents a review of the techniques for measuring complex relative permittivity and also explains basic properties for understanding the principle of complex relative permittivity measurement. There are 6 measurement techniques mentioned in this article. These techniques consist of…
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The Effect of Municipal Wastewater Treatment System on Species Diversity and Density of Phytoplankton in Mangrove Forest in front of The King’s Royally Initiated Laem Phak Bia Environmental Research and Development Project, Phetchaburi Province
The objective of this study was to investigate the effect of municipal wastewater treatment system on species diversity and density of phytoplankton in mangrove forest in front of the Royal LERD Project compared with a reference mangrove. The effluent from the Royal LERD Project was collected and…
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Investigation of agriculture seed flow in screw conveyors using discrete element method
Screw conveyors are widely used in conveying processes in agriculture and manufacturing industries for transporting granular materials. The performance of a screw conveyor can be affected by many factors, such as shape and size of the granular materials, influence of the friction between each…
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Effects of Fusaric Acid to Inhibit Encystment and Excystment of Acanthamoeba spp.
This research examined effects of fusaric acid on encystment and excystment of 4 Acanthamoeba isolates including AS and AR isolated from the keratitis patients and S3 and S5 isolated from soil samples. AS, AR and S3 were classified as the genotype T4 whereas S5 was T5. Trophozoites were treated…
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The study to the effect of air flow rate controlling pneumatic system in a machine pouring raw milk into storage tanks
The objective of this research is to study the air flow rate control of a pneumatic system of a machine that is used in the automatic pouring of raw milk into a storage tank. The study was used to setup the amount of air flow rate and the pressure to control the pneumatic system in the raw milk…
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Some properties of sg-submaximal in minimal structure space
In this paper, we study the properties of open sets, closed sets, closure operator and interior operator on minimal structure space. We will provide characterization of sg -submaximal space by using various kinds of generalized closed sets and open sets.
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The Development of Environmental Care Model for the Home Bound Elderly by a Family, Ubon Ratchathani Province
The action research aimed to study the model for the environmental care of the home-bound elderly of Narueang community in Nayia district, UbonRatchathani province in January 2018. The target groups were 69 elderly people, 2 sub-district administrators, 2 officials tasked to deal with the elderly…
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A Comparison of Forecasting Method of Number of Customer Accounts that use the Service Internet Banking using Box-Jenkins Method and Holt’s method
The purpose of this research was to study and compare the forecasting methods for number of customer accounts that use the service internet banking by using Box-Jenkins method and Holt’s method. Time series data were divided into two groups, the first group was monthly from March 2010 to April 2017…
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Evaluation of the antioxidant activity in Thai herbs
The objective of this study was to appraise and investigate the antioxidant properties of fifteen Thai herbal plants. Samples were extracted by 95% ethanol and then diluted to 2% concentration. All samples were evaluated by three techniques as 1) 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical…
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Deep Convolutional Neural Networks for Plant Recognition in the Natural Environment
This paper examines a deep convolutional neural network (Deep CNN) for plant recognition in the natural environment. The primary objective was to compare 4 CNN architectures including LeNet-5, AlexNet, GoogLeNet, and VGGNet on three plant datasets; PNE, 102 Flower, and Folio. The images in the PNE…
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Environmental valuation of durian cultivation in agroforestry and commercial agricultural systems in Uttaradit province
A study on environmental valuation in agroforestry systems and commercial agroforestry, Uttaradit province examined durian farms in 3 areas, namely, Fai Luang sub-district and Mae Poon sub-district in Laplae district and Ban Dan Na Kham sub-district in Muang District, Uttaradit Province. By placing…
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Perturbative analysis of Newton-equivalent quantum quartic anharmonic oscillators
Newton-equivalent Hamiltonians are Hamiltonians whose classical dynamics agree with those from the standard Hamiltonian. In this work, we perturbatively work out energy spectra and wavefunctions of quantum mechanical Newton-equivalent Hamiltonians with quartic anharmonicity anharmonic oscillator…
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Efficacy Assessment of a Rural Water Supply in Sakon NaKhon Province
Water supplies in rural areas suffer from deficient maintenance thereby causing a problem in the water quality standard. The purposes of this research are to study the maintenance procedures of the water supply production and to evaluate the efficiency of the water system management in Sakon Nakhon…
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A Travel Itinerary Planning Application under Safety Constraints
The tourism industry has grown continuously. It generates a large amount of income for the country each year. Past data indicates that safety confidence is one of the major factors affecting tourism. Unfortunately, there are only a few existing research studies on travel planners that consider…
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Characterization of Poly(L-lactide) and Poly(D-lactide) blends by solution casting process
Polylactide is the most widely used biodegradable polymer. The high thermal stability and mechanical properties of polylactide makes permit a wide range of industrial applications. Polylactide has two isomers; Poly (L-lactide) (PLLA) and Poly (D-lactide) (PDLA). Blended PLLA and PDLA forms in a…
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The Predictive Factors for Alcohol Consumption Among Students in the Higher Education
This analytical cross – sectional study examined the factors related to alcohol consumption among public health students in the Faculty of Public Health, Mahasarakham University. Stratified random sampling was used to recruit 175 eligible students. The inclusion criterion was that the undergraduate…
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Irrigation Control System for Drip Irrigated Tomato in Greenhouse using Timer-based Control Method and Crop Water Requirement
This research on the drip irrigation management system for tomato cultivation in greenhouses aims to develop a small control system with precise control of the quantity and time of irrigation and fertilization. Controlling systems use small-board processors and timer-base modules to refer to an…
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Aircraft Conceptual Design using Multi-Objective Evolutionary Optimization: Comparative study
This paper demonstrates design of a commercial aircraft at the conceptual design stage by considering 2 objective functions i.e. minimization of aircraft maximum takeoff weight and maximization of lift-to-drag ratio multi objective evolutionary algorithms (MOEAs). Dynamic stability is taken as a…
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Particles in Bound State System under the Lennard-Jones Potential by Using Finite Difference Methods
This paper aims to present a calculation of energy levels of (12-6) Lennard-Jones potential of the quantum mechanical system of the bound state problem by using finite difference methods (FDMs) with a truncation error for constructing a proper Hamiltonian matrix and calculating the eigenvalues and…
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