his project presents a power flow analysis model for the purpose of studying power flow in a power system model. At present electric power is an important factor driving the country both in industry and transportation. The demand for electric power tends to increase the production is insufficient to meet the demand. Therefore it is necessary to make the most of the energy resources available in the system. An effective system must be analyzed to detect possible errors. A sudden increase or decrease in load in the system may result in inadequate production and distribution efficiency. Therefore this project is presented for the analysis of power flow in a 3 bus 5 bus and 30 bus power system model using a math simulation program. It is divided into 3 case studies: Case 1 power flow under normal conditions Case 2 transmission line disconnection Case 3 adding distributed power generation sources.

A simple flow injection analytical system for an automatic determination of phosphate in water samples using the molybdenum blue method was developed. Samples were injected and mixed with ascorbic acid used as a reducing agent. The absorbance of the resulting molybdenum blue complex was measured at 880 nm by a spectrophotometer. The optimal conditions of this system were 2 mL/min of carrier flow rate 1000 μL of sample volume 60 centimeters of mixing tube length and 0.020 mol/L of ascorbic acid. The proposed method showed reliability high sensitivity spend small amount of reagents and samples and fast sample throughput (52 samples/hour). The limit of detection (LOD) was 0.015 mg P/L of phosphate. Precision obtained injecting a phosphate standard solution of 0.50 mg P/L (n=10) was 1.81%. This system can be applied to determination of phosphate content in surface water samples in Lopburi province by comparing with a standard method. It was found that obtained from the developed system agreed well with the standard method using the pair t-test (tstat 0.04 < tcrit 2.36). This flow injection analysis system has no effect from arsenate and silicate interference for the analysis of natural water samples.

Currently in 2020 the world is facing a severe Covid-19 pandemic. More than a 20 million patients were infected and continue spreading the viruses. As a result there has been a huge demand for adequate hand sanitizers in the market especially an alcohol-based spray or gel product. The repeated use of hash formulas containing alcohol having an impact on the skin such as a skin irritant itch dryness an allergic reaction These damaged skin can lead to eczema an inflammatory skin condition. Besides using inappropriate formulation or ingredient in alcohol-based gel products can leave a sticky feeling after using the product. However using a high concentration of alcohol and spray alcohol to avoid this problem is not a suitable solution. Due to alcohol can destroy or inactive viruses takes at least 30 seconds. To reach the level of inactive condition the product should not evaporate too fast. The solve the mentioned problem the semi-gel alcohol-based product was developed by adding the skin moisturizers and Khlu’ s flower extract with high antioxidant activity. According to the result in this research the total phenol content of the flower extract is 3105.44+41.50 GAE mg/L extract whereas the DPPH radical scavenging is 0. 21+ 0. 02 equivalent vitamin C/ ml extract. From the sensory evaluation 20 healthy participated in this research. The majority of participants thought that the developed semi spray-gel product dried quickly and that neither product felt sticky after using. No drying effect on the hands. The product can enhance the moisture on the skin. However the smell needs to be more developed.

The objective of this research was to design and development of a continuous flow paddy dryer with infrared radial radiation technique. The prototype of dryer consists of two concentric circular cylinders cylinders which the paddy drying chamber is height of 1 m. The inner cylinder has diameter of 26.5 cm made from glasses and outer cylinder has diameter of 29.5 cm made from perforated (1.75 mm) steel sheet. At the center of cylinders installed 1200 w of electric infrared heater. A hopper was installed on the top of the chamber while 120 w of blower and paddy flow control were installed at bottom of chamber. The performance of the dryer in terms of specific energy consumption (SED) drying rate (DR) and quality of paddy i.e. head rice yield (HRY) and whiteness index (WI) were evaluated by drying 15 kg of paddy with initial moisture content of 23-26% (w.b.) by using the drying conditions of 80oC of drying chamber temperature 1.075 m3/min of air flow rate and 0.837 1.228 1.875 and 2.308 kg/min of paddy flow rate. The results found that paddy flow rate at 1.875 kg/min is the optimum condition because gave the highest DR lowest SEC and rice qualities (HRY and WI) closely to control.

The purposes of this research follow as 1) the creating of learning package : How to Make the National Flowers of Asean Using Kohyor Fabric effectively 2) comparing pre and post learning activement 3) studying student’s satisfactory to teaching medhods by the creating of learning target group 20 students used for purposing sampling. The results of research that The Creating of Learning Package : How to Make the National Flowers of Asean Using Kohyor Fabric are more effective than criteria (E1/E2 80/80) The Creating of Learning Package : How to Make the National Flowers of Asean Using Kohyor Fabric higher than significance at .05 and students are satisfied at Tthe Creating of Learning Package : How to Make the National Flowers of Asean Using Kohyor Fabric at the high level (x ̅= 4.35 S.D. = .60)