The objectives of this research were to study and compare factors affecting dropping out of undergraduates in Rajamangala University of Technology Phra Nakhon. The finding on four types of factors were launched : personal educational institute family and social factor. Survey research methodology was exploited by distributing questionnaires to sample group of 638 RMUTP undergraduates in 2012 academic year. And the data was analyzed by the percentage the standard deviation the t-test and one way analysis of variance (ANOVA). The results were as followed : the personal factor as a whole was at low level they were : insufficient background knowledge in their fields capability in passing the examination getting low grade point average learning without planning boring of learning facing financial problem negative attitude in vocational field learning in dislike branch absence in class and having problems on family responsibility. On the institute factors as a whole it was at moderate level the causes were: inadequate facilities and services of the institute personal safety learning without instruments lack of helpfulness for the handicapped institute’s strict discipline inappropriate laboratory and buildings the executive management’s transparency institute’s relations with students unsuitable activities for learning expensive fee the students’ entrance without admission system overloaded extracurricular activities. On the family factor it was at low level as a whole they were : economics problems the family’s poverty parents’ attitude towards the institute single-mom’s burdens stability of parents career. Finally the social factor as a whole it was at low level they were : distance from students’ home the freshmen’s traditions self( 4) adjustment among peer group improperly learning environment quarrels and conflicts with others and freshmen’s assimilation in new surroundings. By comparing personal factors to family factors the study found that all factors were nonsignificantly different at the level of 0.05. While the institute factors and the social factors were significant different at the level 0.05

This research aimed to study the use of coarse aggregate obtained from removing old recycled asphalt pavement (RAP) in the production of the porous concrete paving block. Crushing and size separation of the coarse aggregate by using standard sieve size by selected the gradation size of the coarse aggregate that passed to sieve size 1/2” and retained on sieve size 3/8” and other that passed to sieve size 3/8” and retained on sieve size No.4 by mixing ratio 50 : 50 of the mass as replaced natural coarse aggregate. Portland cement quantity about 18% and 20% by weight of the aggregate. The water to cement ratio was 0.30 and 0.35 respectively. Compressive strength flexural strength and water permeability were investigated. The results showed that the cement content and water to cement ratio was influenced the strength properties and water permeability rate of the porous concrete paving block. The porous concrete paving block mixed with higher cement content (20%) had the compressive strength at the age of 28 days increased by 16-24% when compared with lower cement content (18%). On the other hand the water permeability rate decreased by 5.1-8.1%.

This research aims to develop Thai herbal formulas for household cleaning products and reduce the use of chemicals by using kaffir lime herbs to extract essential oils by using a method of squeezing from the bark. The result is a dark green essential oil with a pleasant aroma when mixed with liquid hand soap and natural residues such as water extracted from silkworm cocoons to add moisture and lye to remove it. Reduce the use of chemical flavoring agents the use of coloring chemicals the use of moisturizing agents and the use of degreasers. In this research the formula for hand washing liquid soap using 80 ml. of essential oil from kaffir lime peel is the right amount resulting in liquid hand soap with a pH value of 7.3 which is the value that is in the standard for mixed liquid soap products. TIS 1403-2551 can inhibit the bacteria Staphylococcus aureus (S.aureus) a bacterium that can cause diarrhea in humans.

This research is to develop and experiment the hybrid solar dryer by using cultivated banana as the ingredient in the experiment. The objective is to design create and test the hybrid solar dryer that using heat energy with infrared heater. The result from the experiment of drying cultivated banana at night-time by using heat energy from infrared heater is found that at night-time experiment cultivated bananas moisture is decrease more than at day-times experiment for 61.25 %. The temperature inside the hybrid solar dryer at night when using heat energy from infrared heater is at 49.1-55.0°C. Using heat from sunlight together with infrared heater cause the cultivated bananas moisture to decrease better approximately 27 % when compare to drying with heat energy by only sunlight.

The objectives of this study were to investigate the three basic tuiles recipes and to study the content of four types of wolffia dry in tuiles at 0% 2% 4% and6% of total ingredient weight. By planning randomized complete block design(RCBD) and evaluating sensory quality in appearance color odor taste texture (crispy) and overall preference with the use of testing methods for 9- Point Hedonic Scale. The study the basic formula for tuiles by allowing 40 tasters and the study this tuiles supplementaly with wolffia dry by allowing 80 testers to be undergraduates in food and nutrition Faculty of Home Economics Tecnology Rajamangkala University of Tecnology Phranakhon. Take average data(Mean) analyze variance (Analysis of Variance ANOVA) and compare differances mean values (Duncan’s New Multiple Test DMRT) The results of the 3 basic formulas of tuiles namely found that the tasting person accepted the formula 1 in appearance color taste texture (crispy) and overall preference. Average 8.02 7.95 8.08 7.93 and 8.13 respectively at the level medium to high level and the tasting person accepted the formula 3 in odor preference average of 7.70 at the level medium. When analyzed Variance and comparison of differences found that appearance color odor taste texture (crispy) and overall preference there are significant differences at the level of 0.05. The results of the study of the amount of tuiles supplementaly with wolffian dry in 4 formula found that the tasting person accepted the formula supplementaly 2% in color odor texture ( crispy) and overall preference average of 8. 15 7. 79 8. 28 and 8. 05 respectively at the level medium to high level and tasting person accepted the replace 0% in appearance and taste preference average of 8. 18 and 7. 88 at the level medium to high level. When analyzed variance and comparison of statistical differences found that appearance color odor taste texture ( crispy) and overall preference there are significant difference at the level of 0.05.