This research aimed to experimentally study of solar panel efficiency with water cooling. Three mono-crystalline solar panels with the capacity of 80 W (for each panel) were used for this test. The first panel was a solar panel without water cooling. The second panel was a panel with water spray cooling. The last panel was a solar panel with water drop cooling. The cooling water flow rate was varied to 50 75 and 100 LPH. From the test it was found that the temperatures of all solar panels had the similar trends. The solar panel efficiency decreased when the temperature of solar panel increases. The solar panel efficiency increased when the cooling water flow rate was increased for both of water spray cooling and water drop cooling. For all water cooling flow rates the water spray cooling solar panel performed higher efficiency than water drop cooling solar panel. The highest solar panel efficiency in this test occurred when the water spray cooling flow rate of 100 LPH.

This research aims to improve the booth model of OTOP products from Phu Fah Pattana Center Nan Province. To increase marketing channels by distributing products to various locations in order to increase sales to community products. The design must take into account the convenience of rapid assembly and dismantling for a limited time. The characteristics of the booth must be disassembled interesting in looks that reflect the identity of Lanna art. There is a beautiful strong structure to support the weight of the product. The size and proportion are suitable for the usage habits of consumers. Which will help promote products in the community that have higher sales stronger communities. Able to divide the product market in the country and can create marketing channels to other countries. It is a good result for the villagers in the community that will have the guarantee of self-sufficiency and sustainably sufficient lives. From the analysis of the Lanna Wisdom Identity Model there are 4 types of concepts which are The concept of the components of the house GalaeThe concept from the barn Concept of the components of the house Kwan Concept of triangular pattern woven grass. After that it was developed to the stage to interpret the meaning of space in form of booth. And then lead to the design of 4 booths. And conducted a questionnaire to find satisfaction with each type of booths that responded to various usability benefits including satisfaction with the appearance and usage characteristics that responded to the behavior of Most users. Conclusion Booths from the concept of Lanna house components called galae have the highest percentage of satisfaction in 3 aspects which are Percentage of satisfaction with the layout of the booth Percentage satisfaction with workpiece assembly and disassembling storage and transportation Percentage of satisfaction with the perception of Lanna identity. For the satisfaction with the size the proportion of use and the convenience of use the booth from the concept of the components of the house Kwan with the highest rate of percentage satisfaction.

White bread has a short shelf life thus the loses its desired charcteracteristics upon storage and its also subject to spoilage by fungi. To avoid this spoilage and increase shelf life the addition of different levels of acidulants (calcium propionate acetic acid and sorbic acid at 0.1 0.2 and 0.3%) were evaluated for their quality characteristics contributing with acidulants as well as their microbial shelf life during 12 days of storage. In addition the mathematical model (GAB and BET) were applied to study the storage condition of bread. From the experiment it was found that bread with calcium propionate addition had the highest specific volume and springiness followed by bread with acetic acid and sorbic acid adding. On the other hand bread contained sorbic acid had the highest density hardness chewiness and color values (L* a*b*) followed by acetic acid and calcium propionate addition in order. Bread contained calcium propionate had the longest shelf life (12 days) followed by bread with acetic acid (8 days) and sorbic acid (6 days) adding respectively. The increase in acidulants levels result in an increase of bread shelf life. From the sorption isotherm curves bread contained 0.3% calcium propionate had the highest monolayer moisture content indicating that it was the most effective against microbrial spoilage of white bread studied.

The plastic outlet problem is a rigid inflexible material. When assembling with a metal outlet set then it is usually not completely homogeneous. When used The outlet burns out quite often. And the plastic itself is less heat resistant. This allows the plastic to melt burn easily and conform to the upgrade of technology capabilities in precision mold manufacturing. And high complexity The researcher has foreseen the factors in making Developing the design and manufacturing of rubber plug molds economic opportunities for Natural Rubber Applications Therefore came up with the idea to develop the design and material selection. And the factors that affect the production is the mold and the process of forming. To help entrepreneurs to exchange knowledge and study the knowledge from this research to continue in the application of natural rubber to increase future value. From the results and experiments it was found that the study of the method of creating a prototype compression molding kit by using rubber forming techniques can be applied and used by various components of forming rubber can be used to develop forming Rubber plug sockets are possible and this process can produce prototypes from natural rubber.

The study of the requirements for opening thinking and problem solving course uses a questionnaire method from a sample of 160 people from all 9 faculties. Using a QR code questionnaire/link with students of Rajamangala University of technology Phra Nakhon. To analyze the basic statistical results (percentage mean standard deviation). The research results were found that the student’s opinion on the teaching of thinking and problem solving course had a total average of 4.10 (high opinion level). By means of descending mean as follows problem solving had the highest average value at 4.26 followed by creativity thinking future thinking applied thinking critical thinking analytical thinking strategic thinking analogy thinking integration thinking synthetic thinking conceptual thinking and critical thinking.