The research objective was to study the market mix factors (7Ps) that affect the decision to use the domestic airline service of Thai passengers at Suvarnabhumi Airport. The population used in the study was Thai passengers that used four domestic airlines at Suvarnabhumi Airport namely Thai Airways Thai Smile Airways Bangkok Airways and Vietjet Airlines. The sample number was 100 passengers per airline or a total of 400 people. The statistics used in the data analysis were percentage mean standard deviation mean difference analysis (One-way ANOVA) and multiple regression analysis. The study results found that most of the passengers who used domestic airlines focused on the overall marketing mix factor (7Ps) at Very Important level. That affected the overall decision to choose the domestic airline service at Very Important level. The hypothesis testing revealed that the different demographic factors in terms of gender age status educational level and average monthly income affected the selection of domestic airlines differently. Marketing mix factors (7Ps) on products physical evidence and process affected the selection of domestic airlines at a statistically significant level of 0.05.

Due to the epidemic situation of Covid-19 has had a huge impact on the Thai economy and society. make a government agency Many private companies have to work from home. which the Faculty of Business Administration Rajamangala University of Technology Phra Nakhon is one organization that has a policy for teachers and students to teach online. As a result teachers and students have to communicate online. As a result students who deal with the registration documents follow up with their advisors about the status of the registration documents. head of department and branch coordinator through online channels such as Line Messenger email etc. which resulted in advisors head of department and branch coordinator There is an increasing workload. from the problems mentioned above Therefore the researcher proposes a research project on the development of a registration document tracking system for students of the Faculty of Business Administration. Rajamangala University of Technology Phra Nakhon In order to reduce the workload of teachers and staff in answering questions about the status of registration documents for students The results of the research showed that the registration document tracking system can help increase the efficiency of teachers and staff. It also gives students the convenience of tracking the status of documents submitted for registration and processing.

In this research we will study an algebraic structure pseudo d-algebras. Then we give some more properties for pseudo d-ideal that can construct a quotient pseudo d-algebras. Moreover we show that the quotient pseudo d-algebras is a pseudo d-algebras.

Special Project Study on Invention Tray with pedestal (Phan-Poom) released the smell from the cocoon. Have a purpose to study the process of producing Phan Tray with pedestals releasing scents from silk cocoons and to study consumer satisfaction Towards the invention Tray with pedestal released the smell from the cocoons. In which a special project studier conducts studies and collects relevant information the data obtained was designed to sketch design. Release the scent from silkworm in 3 styles which are SKETCH DESIGN - A SKETCH DESIGN -B and SKETCH DESIGN -C so that 3 experts will consider the styles of the 3 Phan tray. Phan Based on comments of experts After that I brought Phan to inquire. Satisfaction of target group from 50 individuals the data were analysed using frequency percentage and average values with the analysis results as follows Design and process for making Phan Bush release the smell from cocoons the results showed that Most experts agree that the suitable silkworm varieties for Phanpanrote hybrid silkworm varieties were the large yellow silkworm cocoons because the large yellow silkworm cocoons were large. And easy to peel separate each colour clearly Natural colour cocoons and the components of the Phan Bush should be fabricated from silk cocoons. Satisfaction of the target group towards the product of Phan-Poom invention releasing the scent from the cocoons Product Found that the respondents were satisfied with the suitability of the yellow silk cocoon Pairote Maipradit averaged 4.56 at the highest level. In terms of value and usage they were satisfied in using in various ceremonies with the average value of 4.58 at the highest level. Price satisfaction 4000 baht with an average of 4.02 the highest level. And the distribution locations were satisfied in the online market with an average of 4.64 at the highest level.

The objective of this study is to obtain a model that maximize production of γ-linolenic acid (GLA) by the moss Physcomitrella patens employing response surface methodology (RSM). The RSM with a three-variables (sucrose potassium nitrate and glutamate concentrations) and five-level (-2 -1 0 1 and 2) central composite design (CCD) including 20 experimental runs was employed to optimize the medium composition. Results showed that the experimental data could be appropriately fitted into a second-order polynomial model with a coefficient of determination (R2) more than 0 .9 5 for GLA production. Analysis of variance (ANOVA) revealed that the model was highly significant (p<0.0001) and the effects of the sucrose (20-100 g/L) and glutamate (0.5-2.5 g/L) concentrations on GLA production were significant (p<0.05). The GLA production with the optimized culture medium (sucrose concentration of 62.92 g/L potassium nitrate of 0.80 g/L and glutamate concentration of 1 .4 2 g/L) by RSM increased 4.61 folds when compared with the standard BCD medium. This experimental value (16.37 mg GLA/L) fit well with the predicted values (16.20 mg GLA/L).