This thesis presents improving power quality in power distribution system with integration of photovoltaic energy distributed generation having objectives to improve power quality in distribution system model of voltage sag and voltage swell in distribution system model of power loss in distribution system application of mathematical model model of power generation by using solar energy and distributed generation connection technique simulation. In this thesis the power flow was tested with Newton-Raphson algorithm joining with mathematical model. The case study was done by reduction of power loss in distribution system by using techniques of connection of distributed generation joining with model of distribution system 33 bus. The case study about improvement of voltage sag and voltage swell in distribution system used connection techniques of distributed generation joining with model of distribution system 69 bus. The study found that technique of connection of distributed generation that was presented could reduce power loss and showed the percentage of improvement of voltage sag and voltage swell in distribution system especially voltage sag case according to IEEE 1159-1995 standard. This thesis showed that severity level of voltage sag depended on the size and duration of each distribution system model situation by photovoltaic energy distributed generation can reduce voltage sag.

Architectural fabrics were continuously developed on their unique performance. Architects and Engineers designed them for the application of important buildings around the world despite the symptom that Architectural fabric sizes from manufactures are smaller than the application sizes. Recently although the well-known method used to weld Architectural fabrics to enlarge their size is the high frequency welding there were some application issues. To mitigate those issues the researcher created the hot air welding to replace the high frequency welding in consideration on the failing loads of welded seams which are variable factors of the failing loads to indicate the weld strength and it is crucial for the Architectural fabric application. This research presents the comparison of failing load of weld seams between the hot air welding and high frequency welding by the test of Taguchis Orthogonal arrays L25 method. The test results demonstrated that Architectural fabrics welded by the hot air welding has the highest failing loads of wrap equal to 95.38 kN/m and the highest failing loads of weft at 86.17 kN/m. Conversely Architectural fabrics welded by the high frequency welding has the highest failing loads of wrap equal to 101.37 kN/m and the highest failing loads of weft at 97.78 kN/m. Based on a forementioned results there is no significant difference from both welding methods and thus concluded that the hot air welding could be used to replace the high frequency welding method.

A research project on the utilization of design innovations into souvenir product development based on linking secondary city identities to promote tourism in secondary city provinces. It is a project that has objects to study the identity of a secondary city to be used to design souvenirs packaging public relations materials. to stimulate tourism in secondary cities which is in line with tourism strategies In a research project that has a design and development process Using technology to assist in product design and development Creation of identity from cultural capital in secondary cities. which the results of each aspect are at a very good level. by using the design of the secondary city area in Nong Khai Province and Ratchaburi which is a province with identity and culture by the researcher make character development souvenir products public relations media Characters show theidentity of the city. to create a memory for tourists and create an identity for the provinces of secondary cities

Using copper wire instead of gold wire can reduce a lot of cost in IC production of semiconductor industrial. However the circuit stability (Circuit Reliability) is less than the use of goal wire. Therefore the study to improve the production of integrated circuits in the part of the wire bonding process by increasing the baking process. It is an important process to improve the quality of the integrated circuit between Cu wire and chip. For this experimental study of baking process it was performed by comparing IMC values at 175 ˚C and 200 ˚C. The quality of workpiece was tested and measured by Scanning Electron Microscope (SEM) machine every 30 minutes. The research experiment found that the temperature with effect to the workpiece quality to stabilize the IMC value was 175 ˚C for 9 hours nevertheless the new temperature at 200 ˚C it has been applied with only 3 hours. Finally the IMC testing result is higher than the average of the at 60% standard acceptable level as other research reviews and it also higher than the acceptable level of the industry level at 80%. Hence this result can reduce time cost of IC and workpieces production and it also including the higher quality of the products.

The effects of load frequency control (LFC) of interconnected distribution power system in tie-line substation area load –frequency stability and the frequency respond at distribution generator (DG) are very important for interconnected control power system of tie-line area. The generating power system of solar farm and wind turbine which have interconnected distribution power system in tie-line substation area were tested using 3 simulation parameters: non-controller Automatic Voltage Regulator (AVR) and with Pl Controller. The results showed that there were 3 types of load and frequency changing in the interconnected area: load changed 0.02 p.u. had frequency of load changed 0.025 Hz and large disturbance. Comparisons of load-frequency to respond for steady state the time respond was 7.9 seconds for non-controller 5.4 seconds for AVR and 1.7 seconds for under controlled system at 0.1 p.u using Pl controller. Therefore the Pl controller has better efficiency than non-controller about 31 % and AVR about 16%. It can be concluded that the interconnected distribution power system in tie-line substation area controlling for storage for connected grid had better efficiency and optimization of generating power from renewable solar farm and wind turbine which have interconnected distribution power system in the nearby are balance of controlling of the original system.