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.

Research on Restaurant Demand for Seniors in Bang Sue Dusit and Phra Nakhon Districts Bangkok The objective was to study consumer behavior of the elderly. Food demand for senior citizens in Bang Sue Dusit and Phra Nakhon districts Bangkok The population used in this study were 400 elderly people in Bang Sue Dusit and Bangkok areas. The survey instrument was a questionnaire. The statistics used were frequency frequency percentage mean standard deviation. Two-group mean difference test and One-way ANOVA Analysis of Variance. The results of the study found that most of the respondents were female. Age between 60 - 69 years marital status Most of them are working as government pensioners. and earn less than 10 000 baht. An analysis of the behavior of the elderlys restaurant use revealed that the elderlys behavior of using the restaurant when they are together with their family. The type of restaurant that the elderly use the most is national restaurant. The frequency of using the restaurant for the elderly most of the time. The elderly will go to the restaurant on Saturday - Sunday. The elderly tend to use the restaurant 2-3 people at a time. Access to restaurants more than 501 baht or more. Results of the analysis of restaurant needs for the elderly. Classified by service marketing mix it was found that the elderly had demand for restaurants classified by service marketing mix. Overall its at a high level. The elderly had the highest level of need for physical characteristics followed by personnel at the high level. and the price is at a high level respectively. The results of the hypothesis testing of restaurant demand for the elderly and demographic characteristics revealed that gender age and income were different. There are different restaurant needs for seniors. Analysis of 4Ps marketing strategy the shop must focus on producing fresh clean products and the food must be beneficial to the health of the elderly. and clear beverages suitable for the elderly in choosing to order food. Location the shop must have a convenient location for the elderly marketing promotion Organize promotional activities according to various festivals to meet the needs of the elderly. and clear beverages suitable for the elderly in choosing to order food. Location the shop must have a convenient location for the elderly marketing promotion Organize promotional activities according to various festivals to meet the needs of the elderly. and clear beverages suitable for the elderly in choosing to order food. Location the shop must have a convenient location for the elderly marketing promotion Organize promotional activities according to various festivals to meet the needs of the elderly.

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.