จำนวน Repository ( 1574 )

ชุดจำลองการควบคุมเครื่องกำเนิดไฟฟ้ากระแสสลับสามเฟสเพื่อศึกษาคุณลักษณะของเครื่องกำเนิดไฟฟ้ากระแสสลับสามเฟส
ชุดจำลองการควบคุมเครื่องกำเนิดไฟฟ้ากระแสสลับสามเฟสเพื่อศึกษาคุณลักษณะของเครื่องกำเนิดไฟฟ้ากระแสสลับสามเฟส

This thesis is duplicated of the controlled of the AC. Three Phase Generator with case study and analyze of the characteristic of generator in various operating conditions. By the model works of the actual use in establishment generator this is using generator for backup electricity from main feeder. We have the functional testing of start or stop for check store the characteristics in different conditions at that time. Load distributing of generator for check store parameters. The parallelization of generator into the system in case of emergency while the failure of the mains system. The degradation of generator off the system when main is back to normal or the emergency stops of generator in case of accident during the operation.

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การศึกษาผลกระทบของจานเบรกแบบตรง และแบบกลับที่มีผลกระทบต่อระยะทางการเบรก
การศึกษาผลกระทบของจานเบรกแบบตรง และแบบกลับที่มีผลกระทบต่อระยะทางการเบรก

Nowadays the automotive parts industry greatly grows up in Thailand. Brake disc is one of products that play a role in safety area. As a result the various designs such as front and back-vented brake discs are occurred to improve the performance of usability. Consequently this study aims to develop the ability of braking dynamometer from 9.7 kg-m.1 kg-m. Moreover the influence of the front and the back-vented brake disc effecting on braking distance was investigated by single dynamometer referenced JASO C406 for testing condition. Therefore both of discs were operated under 100 200 and 300 °C of braking temperature and 2 4 and 6 MPa of line hydraulic pressure of braking. 2 to 1272 of moment of inertial From experimental works the test results reflected that the back-vented brake disc created braking distance shorter than front-vented brake disc ostensibly. Besides there are also diversity of factors as temperature pressure and initial speed of braking. Especially the higher temperature caused an increase of deceleration and a decrease of braking distance. Moreover the higher pressure produced a deduction of braking distance and a rise of deceleration. Finally the initial speed of braking was directly various the braking distances in same condition.

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A study on activated carbon from bagasse and charcoal adsorption efficiency in decolorization and COD of sugar factory wastewater from rajburi sugar co., ltd
A study on activated carbon from bagasse and charcoal adsorption efficiency in decolorization and COD of sugar factory wastewater from rajburi sugar co., ltd

The current time activated Carbon spaciously have been used in the process of wastewater Treatment and Air Pollution Treatment because of it can absorb various materials such as colors smells and organic materials both in the wastewater or air pollution In this research the researcher interest to study the activated carbon from bagasse as become more quantity in the country to use for reducing the pollution of wastewater at Sugar Company and recycling the leaving materials. This study is the Experimental Research being divided into 2 kinds of charcoal: 1) synthesizing activated carbon from bagasse 2) charcoal. The three contents of waste water: 10 50 and 100 percent are used for analyzing and testing at three periods of time: 30 60 and 90 minutes. The example of the wastewater were analyzed the color and COD. The using activated carbon from the bagasse with the content of wastewater at 10% shown that it could not absorb the color differently at every periods of time the color remained lower than 5 Pt-Co and it could reduce more COD at the more periods of time. At the content of waste water 50% shown that the more using time for absorbing the color the quality of absorbing become lower (10 15 and 20 Pt-Co) but it became more reduce COD while the absorbing the color at the content of waste water 100% found that when used the more time quality of absorbing the color became lower (25 30 and 35) while the quality of reducing the COD became increase. The charcoal at the content of wastewater 10% its’ absorbing color was 5 Pt-Co at the all periods of time but the result of reducing the COD was increase: 4300 4000 and 3800 respectively. As the testing the content of waste water at 50% shown that the more using the time its’ quality of absorbing the color became lower while the quality of reducing the COD became decrease: 7330 6500 and 6030 respectively. As studying the content of waste water 100% found that the more using the time for treatment the waste water its’ quality became decrease but it could more reduced COD. The comparison between the activated carbon from bagasse and the charcoal shown that the activated carbon from bagasse can absorb the color better than the charcoal at 0.25 Pt-Co and could more reduce COD than the charcoal 43.5 % by average at the content of waste water 10%. While the waste water 50% the activated carbon from bagasse could more absorb the color than the charcoal at 55% and can more reduced the COD than the charcoal 19.34% averagely. For the content of waste water 100 % the activate carbon from bagasse could more absorb the color than the charcoal at 54.17% and reduced the COD 7.83% by averaging.

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The development of ethanol fermentation of jackfruit wastes by a medium size distillation machine
The development of ethanol fermentation of jackfruit wastes by a medium size distillation machine

The development of ethanol fermentation of jackfruit wastes by a medium size distillation machine aimed to study and develop an ethanol fermentation method that gives optimal production of ethanol. In this research the ethanol production capability of 4 different groups of microorganisms including natural microbes microorganisms in stock rice fermented Saccharomyces cerevisiae EDV 492 and S. cerevisiae EC 118 is compared. The following procedure was implemented to allow the prescribed comparison: 1) microbes culturing (350 ml) for a total period of 20 days. Based on the study results all four groups of microorganism were capable of growing in the given culture medium which is sugar substrate. 2) Small sized fermentation (1 liter) for a total period of 4 days. From this second procedure it can be discovered that microorganism in stock rice fermented and S. cerevisiae EC 118 were highly efficient in producing sugar and ethanol 14% and 13% (v/v) respectively. 3) Develop small sized fermentation to a medium sized fermentation (20 liters) by fermenting natural microbes for a total period of 4 weeks until sugar is obtained. According to the study glucose must be added to increase the sugar level up to 25% Brix in order to provide sufficient substrate to allow ethanol production of the studied microorganisms. During ethanol fermentation process it can be found that microorganisms in stock rice fermented and S. cerevisiae EC 118 produced the highest amount of ethanol at 16% (v/v) within the period of 10 days and 8 days respectively. Hence according to this development of ethanol fermentation S. cerevisiae EC 118 is the most efficient microorganism in terms of ethanol fermentation of jackfruit wastes. In addition after the distillation of 99% ethanol it can also be found that both microorganisms in stock rice fermented and S. cerevisiae EC 118 produced 720 ml and 740 ml of ethanol respectively.

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ระดับการเตรียมความพร้อมด้านสมรรถนะนักบัญชีไทย ความสามารถในการปรับตัว และความสำเร็จในวิชาชีพบัญชีหลังเข้าสู่ประชาคมเศรษฐกิจอาเซียน
ระดับการเตรียมความพร้อมด้านสมรรถนะนักบัญชีไทย ความสามารถในการปรับตัว และความสำเร็จในวิชาชีพบัญชีหลังเข้าสู่ประชาคมเศรษฐกิจอาเซียน

This research aimed to study 1) the preparation level of Thai Accountant Competencies and adaptation capabilities; and 2) Factor affecting on success in accounting profession after The Asian Economic Community. The samples consisted of 400 accountant which implement in many businesses. Data collected by using online questionnaire and employed convenience Sampling. Descriptive Statistics were used such as percentage Mean ( X ) S.D. and ranking. Pearson Correlation and Multiple Regression Analysis were also employed to analyze data. The finding results explained that most of antecedents were female finished bachelor degree of accounting and has experiences average equal 7.51 years (S.D. = 6.723). In their views They thought that accountants preparation level competencies especially improvement of knowledge and skills of professional accountant were rather than fair well ( X = 3.9129; S.D. = 0.44034) as same as adaptation capabilities ( X = 3.79; S.D. = 0.46631). Pearson Correlation was between 0.381 – 0.739 at the significance level α < 0.01. This findings also explained that the preparation level of Thai Accountant Competencies accounting experience attitude of implement accounting and adaptation capabilities have positive significance level at confidence level 99 percent (α < 0.01).

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