The purposes of this research were to 1 ) study personal factors of food consumption among supportive medical personnel in Bangkok during the coronavirus disease 2019 (COVID-19) outbreak situation. 2) Study the perception of information about the Coronavirus Disease 2019 ( COVID- 19) vaccine among supportive medical personnel in Bangkok during the coronavirus disease 2019 ( COVID- 19) outbreak situation. 3) Study the new normal food consumption of supportive medical personnel in Bangkok during the coronavirus disease 2019 ( COVID- 19) outbreak situation. 4) Compare the level of importance for the new normal food consumption approach among supportive medical personnel in Bangkok during the coronavirus disease 2019 ( COVID- 19) outbreak situation classified by personal factors and 5) comparison of importance for new normal of food consumption among supportive medical personnel in Bangkok during the coronavirus disease 2019 (COVID-19) outbreak situation classified by the awareness of information on vaccines for the prevention of coronavirus disease 2019 (COVID-19). The sample consisted of 400 supportive medical personnel in Bangkok by multistage sampling. The research tool was a questionnaire. The statistics used in the data analysis were frequency percentage mean standard deviation t- test and one-way ANOVA. The results of the study showed that 1) the personal factors of the supportive medical personnel are female aged less than 31 years single status educational status at the bachelors degree level. The sample group works in the position of administrative staff and has an average monthly income of 10001 - 200 00 baht. 2) Supportive medical personnel gave importance to the awareness of the coronavirus disease 2019 (COVID-19) vaccine the overall was at a high level. 3) Supportive medical personnel focused on the new normal food consumption the overall opinion was at a high level. 4) Supportive medical personnel who have positions in the main medical support and have different average monthly incomes gave different importance to the new normal of consumption by statistically significant at the .05 level. 5) Supportive medical personnel who have different perceptions of the coronavirus disease 2019 (COVID-19) vaccine giving different importance to the new normal food consumption; and it was statistically significant at the .05 level.

The objectives of this research were to 1 ) study the personal factors of food handlers in the canteen of the Ministry of Public Health Nonthaburi Province in the epidemic situation of coronavirus disease 2019. 2) Study the operations according to the food sanitation standards of food handlers. 3) Study the factors related to the performance of food handlers according to food sanitation standards. 4) Guidelines for solving problems in the work of food handlers according to food sanitation standards which the research area is in the canteen of the Ministry of Public Health Nonthaburi Province in the situation of the epidemic of coronavirus disease 2019. The research used a mixed method research consisting of a quantitative research using a sample of100 food handlers per restaurant and a qualitative research by interviewing 3 groups of food handlers. The statistics used in the data analysis were: frequency percentage mean chi-square and Pearson correlation. The results of the research showed that 1) the personal factors of the majority of food handlers 68.00 percent are female 37.00 percent aged between 41 - 50 years36.00 percent graduated from high school 42.00 percent with average monthly income between 10000 - 20000 baht 97.00 percent are Buddhists and most 27 percent are food handlers from rice and curry shops. 2) The food sanitation practices of food handlers in the coronavirus disease 2019 epidemic situation found that 65.00 percent of the workers performed according to sanitary principles at a very good level. 3)Factors related to the performance in accordance with food sanitation standards of food handlers in the epidemic situation of coronavirus disease 2019. The results of the study revealed that as for the personal factors of the restaurant type the leading factories the general knowledge of the coronavirus disease 2019 epidemic situation and knowledge of food sanitation in the epidemic situation of coronavirus disease 2019with contributing factors including the support of equipment to clean or prevent coronavirus disease 2019 from government agencies. Food handlers agencies courage participation in sanitation practices. They have also received training or advice from staff on how to behave in the midst of the coronavirus disease 2019 outbreak there was a statistically significant correlation at the .05 level. As for personal factors in terms of gender age education income and religion there are contributing factors such as the agency of food handlers campaigning or announcing measures to prevent the spread of the coronavirus disease 2019 and had been trained in food sanitation. There are additional factors such as having received food sanitation assessment during the coronavirus disease 2019 epidemic situation received a certificate for clean and safe restaurants to prevent COVIC-19 and 4) guidelines for solving problems in working in accordance with the rules of food sanitation standards of food handlers in the canteen of the Ministry of Public Health Nonthaburi Province in the situation of the coronavirus disease 2019 epidemic found that workshop sanitation training should be organized performance and personal hygiene assessments should be carried out. For public relations work there should be more communication channels additional measures on the part of service users and cleanliness including support for protective and cleaning equipment.

This thesis presented the design and construction of an adaptive active band-pass filter by using a tachometer circuit. The main part was the multi voltage-mode filter circuit based on an operational transconductance amplifier which could automatically adjust the center frequency to adapt to the input signal frequency by the tachometer circuit. The frequency error value in the center frequency was set to be ≤ 3% of the input signal. Furthermore the proposed filter could support the input signal in the frequency range of 10 Hz - 10 kHz. From the simulation and experimental results of the proposed prototype filter it could respond to the frequency according to the theory of the band-pass filter and the error in choosing the center frequency which was 1.45 % and 2.6 % respectively (below the set error value of 3 %). Therefore the proposed filter could be used for real application. The working principles of the proposed prototype filter could also be applied to the noise attenuation circuit of an electrocardiogram machine. Moreover this research could be used as a guideline study for those who want to develop other types of adaptive active filters for higher efficiency.

The objectives of this research were to 1) study attitudes and consumption behavior of clean food for health 2) compare personal factors with consumption behavior 3) compare personal factors with consumption attitudes and 4) study attitudes affecting consumption behavior. The sample group was the population of Bangkok Province. Used in the study: 740 people. The questionnaire was used as a research tool. The data were analyzed by frequency percentage mean standard deviation. T-value test Analysis of one-way ANOVA and multiple regression analysis. The research results were found that: attitudes towards the consumption of clean food for health during the Covid-19 epidemic situation was at a high level. Clean food for health consumption behavior during the Covid-19 epidemic situation was at a high level.Individual factors including gender education and status had different attitudes towards healthy food consumption. During the Covid-19 epidemic situation the difference was statistically significant at the .05 level Individual factors including gender education income occupation and status had different healthy clean food consumption behaviors during the Covid-19 epidemic with statistical significance at the .05 level. Attitudes had a statistically significant effect on healthy food consumption during the Covid-19 epidemic at .05 level.

The research is aimed to 1) study the level and priority of the factors affecting the delay of construction projects and 2) provide suggestions in relation to the prevention of such delay. The sample is 520 people who were working for different construction projects. They were project managers project engineers field engineers and foremen. The data were collected by using online questionnaires and analyzed to find out mean standard deviation (SD) frequency correlation coefficient and confirmatory factor analysis. The findings reveal two significant aspects. First those who were working in the construction projects concerned about the factors affecting the delay of the projects at high level. Respectively the factors related to design resource external factors and others were taken into consideration. The factor regarding to work performance is regarded affecting the project delay at the highest level. Other factors i.e. the design external factors and others and resource have the affects at the lower level. Second the work-related factors can help prevent the project delay. In other words the construction plan and methods as well as the project management should be well-implemented in accordance with the design. The construction site should be on inspection considering its drawing. Regarding the external factors and others the public voices of those living around the construction site should be taken into consideration. Furthermore the effective use of the resources can be carried out by sufficiently preparing all materials tools and equipment for constructing any project effectively as a consequence.