จำนวน Repository ( 1174 )

การจำลองทางคณิตศาสตร์เปรียบเทียบกับการปฏิบัติการโรงไฟฟ้าพลังงานแสงอาทิตย์ขนาดเล็กแบบกระจายตัวในระบบจำหน่าย
การจำลองทางคณิตศาสตร์เปรียบเทียบกับการปฏิบัติการโรงไฟฟ้าพลังงานแสงอาทิตย์ขนาดเล็กแบบกระจายตัวในระบบจำหน่าย

This paper presents a mathematical simulation to compared to operations a small distributed photovoltaic power plant in the distribution system. Practices transmission of electric power by small distributed solar energy With the PVSyst and IEC 61724 mathematical modeling programs the main objective was to study the % performance ratio photovoltaic power plants 5.95 MWp connected in the distribution system of the Provincial Electricity Authority voltage level 22 kV. Therefore this paper is presented as a mathematical simulation compared to operations a small distributed photovoltaic power plant in a distribution system. The results of the study show that the operation of small distributed solar power plants increases the efficiency to be able to produce the maximum electricity and continuously. The system was able to produce the highest power of 8954.9 MWh/year and had an average annual efficiency ratio of 77.84% receiving the highest solar radiation intensity and the highest annual total energy output of approximately 1837 kWh/m2

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การประเมินคุณภาพทางด้านฉลาก ด้านกายภาพ ค่าความเป็นกรด-ด่าง และทางจุลชีววิทยาของน้ำดื่มบรรจุขวดที่จำหน่ายในเขตเทศบาลนครอุบลราชธานี ประเทศไทย
การประเมินคุณภาพทางด้านฉลาก ด้านกายภาพ ค่าความเป็นกรด-ด่าง และทางจุลชีววิทยาของน้ำดื่มบรรจุขวดที่จำหน่ายในเขตเทศบาลนครอุบลราชธานี ประเทศไทย

. In this study examination of label information physical and microbiological qualities was performed in 30 clear-plastic and 3 opaque-plastic bottled drinking water products distributed in city municipality of Ubon Ratchathani. Results showed that 12 clear-plastic (36%) and 3 opaque-plastic (9%) bottled drinking water samples had no expiry date on the product labels which were discordant to the criteria for drinking water in sealed containers imposed by the Ministry of Public Health of Thailand no. 383 (2017). Odorless appearances of all drinking water samples were observed. Values of pH in 4 clear-plastic (12%) and 3 opaque-plastic (9%) bottled drinking water samples were in the ranges of 6.21±0.00–6.29±0.03 which were below the allowable limit (pH 6.5–8.5). All bottled drinking water products contained numbers of total coliform and fecal coliform bacteria less than 2 MPN/100 mL and were devoid of E. coli. Therefore based on the quality of clear-plastic and opaqueplastic bottled drinking water products distributed in city municipality of Ubon Ratchathani 1 5 samples (45%) did not meet standard for drinking water in sealed containers declared by the Ministry of Public Health of Thailand (1981 and 2017) owing to no expiry date labeled on the products and pH value below 6.5.

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การศึกษาการยืดอายุการเก็บรักษาของผลิตภัณฑ์ขนมปังด้วย calcium propionate, acetic acid และ sorbic acid
การศึกษาการยืดอายุการเก็บรักษาของผลิตภัณฑ์ขนมปังด้วย calcium propionate, acetic acid และ sorbic acid

White bread has a short shelf life thus the loses its desired charcteracteristics upon storage and its also subject to spoilage by fungi. To avoid this spoilage and increase shelf life the addition of different levels of acidulants (calcium propionate acetic acid and sorbic acid at 0.1 0.2 and 0.3%) were evaluated for their quality characteristics contributing with acidulants as well as their microbial shelf life during 12 days of storage. In addition the mathematical model (GAB and BET) were applied to study the storage condition of bread. From the experiment it was found that bread with calcium propionate addition had the highest specific volume and springiness followed by bread with acetic acid and sorbic acid adding. On the other hand bread contained sorbic acid had the highest density hardness chewiness and color values (L* a*b*) followed by acetic acid and calcium propionate addition in order. Bread contained calcium propionate had the longest shelf life (12 days) followed by bread with acetic acid (8 days) and sorbic acid (6 days) adding respectively. The increase in acidulants levels result in an increase of bread shelf life. From the sorption isotherm curves bread contained 0.3% calcium propionate had the highest monolayer moisture content indicating that it was the most effective against microbrial spoilage of white bread studied.

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การพัฒนาลวดลายผ้ามัดหมี่ที่สะท้อนอัตลักษณ์ของชาวไทยพวนสู่การออกแบบผลิตภัณฑ์แฟชั่นร่วมสมัย
การพัฒนาลวดลายผ้ามัดหมี่ที่สะท้อนอัตลักษณ์ของชาวไทยพวนสู่การออกแบบผลิตภัณฑ์แฟชั่นร่วมสมัย

The development of Ikat fabric reflects the Thai Phuan identity to designing contemporary fashion products. The purpose of research divided into 3 selections 1 studying the Thai Phuan identity ‘s fabric 2 developing the weaving’s patterns of Thai Phuan fabrics 3 designing the contemporary fashion products from the fabrics based on the satisfaction of customers survey. The simple groups are the ancient pattern’s Ikat fabric and the applied pattern’s Ikat fabric. The collected equipments of the research analyzing the identification of Ikat fabric by separating the analyzed standard into 3 parts such as the characteristics outline’s pattern weaving and coloring the evaluation of pattern fabric developed for professional opinions the evaluation of satisfaction of fashion products from professional opinions. The results have found that the older Ikat pattern fabric has been inspired from nature as well as arithmetic and line. Straight line referred natural environment. The type of pattern layout from straight line using square pattern continued 2- shaft weaving has the favorite colors are red yellow green dark brown black white. The Ikat’s pattern adapted weaving has the arithmetic framework and straight line. Diagonal pattern was inspired the 4-shaft weaving the colors usually be complementary colors but the white colors would be tie-dying Ikat the popular basic tone colors would be pastel tone reducing the dark of colors by using the white. Researcher design and improve 3 Ikat pattern fabrics which inspired the identity of Thai Phuan culture three. There have found that the professionally fashion designs think the first designed Ikat fabric “Ruam Nam Chai Thai Phuan” should be mostly developed into fashion products by (xˉ= 4.56)(S.D.=0.59) And the fashion products was evaluated by the fashion professional they were satisfied with the design number.4 (unisex) by (xˉ =4.69) (S.D.= 0.40) From those results shows that the Ikat fabric presented the identity of Thai Phuan and the designs is responded the customers as well.

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แนวทางการรับน้องอย่างสร้างสรรค์เพื่อสร้างความสัมพันธ์ต่อการเรียนด้านวิศวกรรมศาสตร์
แนวทางการรับน้องอย่างสร้างสรรค์เพื่อสร้างความสัมพันธ์ต่อการเรียนด้านวิศวกรรมศาสตร์

Admission to higher education By students who come to study later from different institutions Different residence But have to live in the same university Which must meet An environment with a difference Social trends or values of the current society that have Quick change Friends that have a wide variety of family and social basics are also popular. The lifestyle which students who come to study in the Faculty of Engineering must have patience there is discipline and responsibility; there is morality ethics and sacrifice. Therefore it will succeed as a good and qualified engineer. Creative recruitment process it is considered that it is important to the lifestyle of a new group of students to have the opportunity to build a good relationship with their studies in engineering. Able to develop good relationship in future career in engineer A creative approach to recruiting to build relationships towards engineering studies. By organizing seminars to guide creative recruiting from people related to students Which consists of administrators teachers And staff of the Faculty of Engineering the objective of the official recruitment is creatively to find ways to create creative recruiting in the Faculty of Engineering and to create positive values for the Faculty of Engineering students. So that students are conscious of building a good relationship to study engineering.

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