On Earth all objects have a weight which Earths mass exerts on them to downward force of gravity. The weight of an object can find somethings weights in Newton unite. It calculated on multiply the mass in kilograms by the acceleration of gravity in the units of meters/seconds2. The purpose of this study was to design and develop an experimental setup for measuring the gravity acceleration. It involved designing by using free-fall motion method in vacuum tube based on digital Technology and photo gate sensor measured the velocity of the ball object. The data were analyzed by Microsoft Excel. The value of gravity acceleration obtained at 9.617 m/s2 from the experiment set up. The value from the experiment was compared with the obtained from true value at Bangkok Thailand. It found the error at 1.697 %. The assessment of the quality used a questionnaire for data collection. Five content experts in Physics teaching evaluated it. That found mean 4.89. The results of the study revealed that the experimental set up were excellent quality of and high efficiency. So that this experiment suitable to be used in physics classroom.

Rail transport is a type of transportation that strongly influences economic due to its ability to transport a large number of passengers and products per trip relying on diesel-electric engines. The objectives of this thesis were set to investigate and develop the electrical performance tracking system of long-distance diesel electric locomotives and compare the electrical performance measured by the diesel electric locomotive performance tracking system and measured from the measuring instrument at Diesel Engine Maintenance Station in Bang Sue. The electric diesel locomotive no. 4513 (Cummins KTA50-L) was selected as the study subject of the experimentation. The results showed that the power loss of the diesel electric locomotive from the conversion of alternating current to direct current was inversely proportional to the engine speed. The power losses between the low and high engine speeds were equal to 77.11 and 2.49 percent respectively. The above data reflects the limitation of diesel electric engine performance and should lead to the construction of a database for making decision on the right engine selection suitable for the towing load of the locomotive.

In this research the design of plasmonics interference using micro PANDA ring resonator as the source of single photon and entangled photon generation from the four-wave mixing process was studied. The coincidence of photons from Hong Ou Mandel effect between a wave guide and a micro PANDA ring resonator layer was detected. The whispering gallery mode of interference at the central top inducing the plasmonics signals at the outer nano gold coating PANDA layer was used to analyze from micro particles. Its quality factor was found at 106 of order magnitude and became appropriately to apply this plasmonics interference to be biosensor.

This research aims to establish and measure the quality of students language proficiency Thailand for foreigners. Practical application Thailand Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon The sample of Chinese students High levels of Nanning 3rd year of study in Thailand. Faculty of Liberal Arts Rajamangala University of Technology Phra Nakhon No. 13 Semester 1 Academic year 2557 results were found. Measurement of Proficiency in Thailand. For Chinese Students The 3rd year of study in Thailand. Faculty of Liberal Arts The researchers created a multiple choice answer four options with 50 items measuring five aspects: the opposite of 10 questions the meaning close to 10 on the wrong side of 10 the right to have 10 problems and aspects. Selection of 10 items is measured with a content validity index based on the consistency of 1.00 with the difficulty (p) from 0.43 to 0.89 with discrimination (r) from 0.13 to 0.60 validity. Correlation coefficients ranging from 0.11 to 0.55 and the reliability coefficient for Bucks alpha ranging from 0.80 – 0.82 split half reliability ranged in value was 0.88 The results of the research can be a tool to measure language proficiency level of Thailand. Thailand is the language of international students at a certain level.

งานวิจัยนี้มีวัตถุประสงค์เพื่อใช้ในงานวัดอัตราการเป็นสนิมของโครงสร้างคอนกรีตเสริมเหล็กโดยทั่วไป มักจะได้รับผลกระทบจากการเกิดสนิมของเหล็กเป็นส่วนมากเป็นผลให้กำลังของโครงสร้างคอนกรีตลดน้อยมีการพบการเสื่อมสภาพของโครงสร้างจากเหล็กเสริมเป็นสนิมอย่างแพร่หลายโดยเฉพาะโครงสร้างที่อยู่บริเวณชายฝั่งทะเล โดยสาเหตุสำคัญส่วนใหญ่ที่ทำให้เกิดสนิมมักเกิดจากคลอไรด์ซึมผ่านคอนกรีตเข้าไปถึงเหล็กเสริมและเมื่อคลอไรด์ซึมผ่านเข้าไปในคอนกรีตจนถึงระดับของเหล็กเสริม มีปริมาณมากเพียงพอก็จะทำลายฟิล์มที่ป้องกันที่ผิวเหล็กเสริม และทำให้โครงสร้างคอนกรีตเสริมเหล็กนั้นเกิดสนิมสะสมเพิ่มขึ้นเพียงพอที่จะทำให้เกิดหน่วยแรงและดันให้คอนกรีตเกิดความเสียหายเป็นผลทำให้กำลังของโครงสร้างลดน้อยลงจนไม่สามารถรับกำลังได้อีกและโครงสร้างจะเกิดการวิบัติในภายหลัง