จำนวน Repository ( 822 )

การวิจัยเพื่อการพัฒนาปฏิบัติการเคมีวิเคราะห์ : การวิเคราะห์กึ่งจุลภาคเพื่อเป็นมิตรต่อสิ่งแวดล้อม
การวิจัยเพื่อการพัฒนาปฏิบัติการเคมีวิเคราะห์ : การวิเคราะห์กึ่งจุลภาคเพื่อเป็นมิตรต่อสิ่งแวดล้อม

Analytical chemistry laboratory manual was developed for the student in the Division of Enviromental Science and Technology Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon with the aim of promising the laboratory skill of the student in the preparation and standardize the solution gravimetric analysis volumetric analysis and finally spectroscopy analysis. Traditionally in the analytical laboratory pricey analytical grad of the reagent with large amounts and quantities is required. Moreover some of them are toxic and harmful to the environment. These can cause a problem for the university in which the budget is limited. In this work the idea of the small but powerful experiment was conducted. All the chemical and reagent was reduced to 50%. In the final laboratory instead of costly and toxic reagent some substances were replaced with the natural material such as water extraction from purple cabbage. According to the results the developed experiments were accurate enough for practicing the student except for the precipitation titration experiment. In order to evaluate the understanding a mini-project was assigned to the student in the group. By using the developed manual the student can overcome the problem in the lab and the awareness of the environment was also improved.

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การออกแบบและพัฒนาหุ่นทดสอบการชนรถจักรยานยนต์
การออกแบบและพัฒนาหุ่นทดสอบการชนรถจักรยานยนต์

The purpose of this research is to design and develop dummy (anthropometric test dummy) for motorcycle frontal collision test. The conceptual design of dummy is male aging between 25-55 years old 6 pieces of rib and deformable 76.2 mm. In order to performance test it was classified into 2 testing by static testing and dynamic testing. For static testing the energy absorption behavior between force and deflection or “ static curves” is determined. While dynamic testing is considered to the energy absorption behavior between forces and several velocities or dynamic forcedeformation curves impact acceleration impact force on sternum and injury severity with the relationship of viscous in velocity function. The results of the energy absorption behavior on chest of dummy from static testing the tendency of chest deflection is relatively low during the initial force and suddenly increasing when rise to the critical point. This behavior is similar to the energy absorption of the human chest. Therefore the design features of this test dummy can reflect behavior that is close to the human anatomy. In case of dynamic testing it is discovered the ability of the dummy testing to absorb up to 560 J impact acceleration 3 8 . 4 3 g impact force on sternum 5 . 0 9 4 kN. The viscous in velocity function is 0 . 8 2 5 m/ s which compared to injury severity at AIS3+ ( or higher than serious injury) . Therefore the dummy design in this research project corresponds to the collision test of a motorcycle.

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การออกแบบและพัฒนาชุดขับเคลื่อนในการทดสอบการชนรถจักรยานยนต์
การออกแบบและพัฒนาชุดขับเคลื่อนในการทดสอบการชนรถจักรยานยนต์

A design and development of powertrain module crash test using with the motorcycle crash test is aim to create a special tool for automotive assessment and safety engineering based on the realistic test. In order to main system of power module tester is consisting of powertrain system using electrical motor transferring system using chains and gears and control direction system using dual rails respectively. Based on powertrain module tester performance crashing speed relative angle between target and distance before crash are regarded. Nevertheless the result of testing performance was conducted to statistic hypothesis test by Mean Absolute Deviation: MAD Standard Deviation: SD Mean Square Error: MSE Mean Absolute Percent Error: MAPE and Root Mean Square Error: RMSE. The results of this approach discovered that the crashing speed was the highest error with 96% and the lowest was distance before crash. Furthermore it was corresponding to the statistic hypothesis test. However the result of the error was influence of the rails distance which limit by funding. In case of crash energy the mean of energy was appeared on 10.978 J. Whereas the tendency of variable was similar to polynomial equation.

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การพัฒนาคุณสมบัติของต้นแบบแผ่นมวลเบาจากเศษใยยางพาราและเถ้าไม้ยางพาราสำหรับประยุกต์ในระดับภาคสนาม
การพัฒนาคุณสมบัติของต้นแบบแผ่นมวลเบาจากเศษใยยางพาราและเถ้าไม้ยางพาราสำหรับประยุกต์ในระดับภาคสนาม

The development of lightweight flat sheet prototype from para rubber leaves and para para rubber wood fly ash for field work application can offer an alternative method of adding value to agricultural wastes and help to conserve the environment with green products. The natural fiber especially agricultural waste fiber is an encouraging prospect. Natural fiber composites have been used for building applications. The aim of this research was to investigate the potential use of para wood ash to producing a cement composite as an environmentally material. Material. The cement paste with 5-2 % weight of para wood ash. The specimens were cured at 25± 2 oc for 24 hours. The properties of cement composites mixed with different proportions of para wood ash were compared with Ordinary Portland Cement (OPC). In addition the morphology of para wood ash was examined by using scanning electron microscope. The density increased with the increase in the percentage of para rubber leaves from 1% 2% 4% and 6%. The finding is attributable to the enhanced packing density by the fine para wood ash particles size was found 5-10 um.Moreover para wood ash particles could arrange to fill the inter-particle voids in cement pastes which resulting to increase the compressive strength of cement paste. Consequently para wood ashes could incorporate in the construction materials to enhance the mechanical properties and durability performance of the cement composites

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ปัจจัยที่ส่งผลต่อการพัฒนามหาวิทยาลัยสู่การเป็นมหาวิทยาลัยดิจิทัล
ปัจจัยที่ส่งผลต่อการพัฒนามหาวิทยาลัยสู่การเป็นมหาวิทยาลัยดิจิทัล

This research aims to study perception and understanding about being a digital university and to study and analyze the factors that affect digital university. There are benefits to be given as a guideline in determining the direction of university operations in line with future change conditions. And it is a way to develop a university into a digital university. Population used in this study was 1250 people from staffs at Rajamangala University of Technology Phra Nakhon. The sample consisted of 339 questionnaires. Collected data were analyzed using the frequency distribution percentage mean and standard deviation. Initially the researcher has studied factors that affect the development of the university into a digital university based on data and theories. After that the researcher conducted a survey with the sample group. The results showed that : 1.People who have ever perceived information about being a digital university about 74.04%. Overall the response correctly was 78.73% on average and more than 3 items were correct in 5 items totaling 228 persons representing 90.84%. 2) Opinions on the factors affecting the development of the university into a digital university as a whole was classified in a high level the average was 4.18. When considering each aspect showed that the significant factors in a highest level were the management of the organization the average was 4.26 and the structure of digital technology within the university the average of 4.25 respectively. Significant factors in a high level were personnel average 4.15 and teaching quality were 4.07 respectively. When considering each item showed that the significant factors in a highest level were 1) the efficiency of the Internet and wireless internet 2) the support budget 3) the digital skills of the personnel in the operation. And the ability of teachers to use digital technology in their teaching and 4) Classroom / Laboratory Supported for Digital Technology. Therefore universities should: 1) Give importance to knowledge building and attitudes. Accurate to prepare personnel for a digital university. The cover every unit in the University to encourage adaptation to ready for change to be a digital University. 2) And set policies that are digitally linked to all university visions and strategies; The Including to clear operational framework linked to the mission. 3) Manage the digital structure of the digital system in a systematic and current develop high-speed internet and high-speed wireless internet to provide stability and signal coverage for all areas of campus. 4) There are many of IT personnel who are knowledgeable enough to meet the needs of university departments. IT staff must be able to provide advice modify or facilitate the use of IT to personnel and students. 5) There should be a technology-based curriculum. To provide students with the skills to use a variety of technologies. Can be used in the occupation and the labor market. In addition should also develop a classroom that supports digital technology to keep pace with the changing world society.

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