จำนวน Repository ( 3447 )

Technical specification and Agreement for the map system of RMUTK
Technical specification and Agreement for the map system of RMUTK

The development and update a map in Rajamangala University of Technology Krungthep in geographic information system with the measurement map system in a large scale map by use theoretical surveying all basic such as ground surveying aerial photogrammetry remote sensing theory Processing and the accuracy validation survey. These are part of a map system. Methodology or procedures all a map system will out technical specification and agreement to implementation a map system for the definition purposes. This Technical specification and agreement are under the standards of the organization and institution in a field survey. Those standards or rules taken improve the application to modify the Technical specification and agreement of Rajamangala University of Technology Krungthep only. The results of the study can be divided into main data 9 groups and 30 groups of data from geography at Rajamangala University of Technology Krungthep and standards or rules of organization institution together with the criteria processing and the criteria acceptance tolerances of the measure survey. The results of testing the system map by this the frame of technical specification and agreement. The engineering student survey of Rajamangala University of Technology Krungthep study technical specification and agreement and provides map system. By study used south bangkok area. Student group has set up a system to map the technical specification and agreement created. Plan defined

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Mechanical properties of concrete mixed with reused ceramic tiles reinforced with steel fiber from milling processed
Mechanical properties of concrete mixed with reused ceramic tiles reinforced with steel fiber from milling processed

This research study the mechanical properties of concrete mixed with reused ceramic tiles reinforced with steel fiber from milling processed. The compressive strength of all concretes were designed at 300 ksc at 28 days and control slump in the range of 10 ? 2.5 cm. The steel fiber from milling processed was reinforced at 0.50 1.00 and 1.50 by the weight of cement content. The compressive strength Flexural and tensile splitting for all concrete samples were tested compare with control concrete which it as concrete mixed with reused ceramic tiles not reinforced with steel fiber. The results shown that the reinforcing with steel fiber from milling process at 0.5 and 1.0% was affect to the higher compressive strength than control concrete of 2 and 7% but increasing steel fiber at 1.5% was affect to lower compressive strength than control concrete of 6%. Concrete mixed with steel fiber from milling processed at 1.0% have higher splitting tensile strength than control concrete of 16% while concrete mixed with steel fiber at 0.5 and 1.5% have splitting tensile strength equal with control concrete. The flexural strength of these concretes have higher more than control concrete about 9 17 and 11% for reinforcing with steel fiber at 0.50 1.00 and 1.50 respectively. In addition the water permeability of concretes were increased when the steel fiber were reinforced increases too.

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The relative rotation affecting to AC-Generator
The relative rotation affecting to AC-Generator

The purposes of the research were; 1) to study the relative rotation of AC-generator 2) to study the angular velocities of magnetic coil and permanent magnetic influence generating voltage of AC-generator and 3) to construct predictive equations of generating voltage of AC-generator. By the 12-V 6-pole alternator of motorcycle Pearson’s correlation and regression analysis the findings revealed that: 1) At the lowest relative angular velocity of 376 rpm the generating voltage is 3.28 V. While the highest relative angular velocity of 2280 rpm the generating voltage is 22.98 V. 2) The angular velocity of permanent magnetic has great influences on generating voltage than the angular velocities of magnetic coil at the .01 level of significant and 3) function as below : Generating voltage = 0.806 (Velocity of permanent magnetic) + 0.634 (Velocity of magnetic coil)

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Wind turbine simulator based on constant Volts/Hertz control   three phase induction motor drives
Wind turbine simulator based on constant Volts/Hertz control three phase induction motor drives

This article presents the application of the constant Volts per Hertz control to control a three phase induction motor has torque and speed characteristics similar to wind turbine. Due to this method is not complicated and does not require the parameters of motor. As a result the accuracy of control is independent of variation of the parameters of motor. Furthermore the equation for compensate the difference between the moment of inertia of wind turbine and motor which is consistent with the mentioned control method is proposed. In order to make the dynamic responses of the wind turbine simulator similar to the wind turbine and to overcome the problems of noise amplification from differentiation that leads to instability of the system. The simulation results in Matlab/Simulink program show that the proposed wind turbine simulator can imitate the wind turbine accurately both in dynamic and steady state conditions

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Compressive strength determination of bottom ash mixed with dust stone and portland cement
Compressive strength determination of bottom ash mixed with dust stone and portland cement

This research was to determine the appropriated mixing ratio of bottom ash and admixture (dust rock and Portland cement type 1) for improving the compressive strength. Bottom ash was used instead of soil and the quantities of admixture were 0 2 4 6 8 and 10% by dry weight of bottom ash. The specimens were cured for 7 14 28 and 90 days. Results of compressive strength test show that the admixture of 8% was the best mixing ratio. The increasing primary strength is developed from hydration reaction and the increasing secondary strength at 90 days is developed from pozzolanic reaction. Moreover the compressive strength of this specimen is close to the compressive strength of laterite

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