The purposes of this research were : 1) to study the personal factors in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University 2) to education study in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University and 3) to individual factors affecting in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University. The population students are studying in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University of 267. The instruments used in research questionnaires and interviews. The statistics used for data analysis were frequency percentage mean standard deviation t-test and One Way ANOVA. The research found that as follows: 1) Most students were male 14 years of age by studying in lower secondary students’3/7 they have a cumulated GPA of 3:01 to 3:50 by living with his father - his mother and the aptitude of most business plans. 2) The factor in choosing in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University overall students in grade 3 with comments in agree. The first two items in order from most to least found that the side with the highest mean score the reputation of the school. The second was the instructor and minimum course content. And 3) individual factors were affecting in lower secondary students’ decisions to study in the career Department at the Demonstration School of Ramkhamhaeng University found that students with gender age year of study. The GPA and the Professional and the aptitude different affect students were learning plans and career groups school not different. Except for students with different shelters affect student learning plans and the career Department at the Demonstration School of Ramkhamhaeng University difference was statistically significant at the .05 level.

The purpose of this research are to : 1) Study personal factors of tourists 2) study purchasing behavior on handcraft products of tourist 3) Study the marketing mix factors used to make a purchase decision 4) Find the relationship between personal factors and purchasing behavior 5) Comparison of the importance of marketing mixfactors used in decision making to buy handicraft products in Samut Songkhram Floating Market. The samples were 400 Thai tourists who came to visit and purchase handicraft products in Samut Songkhram Floating Market. The instruments used included: Statistical questionnaire used in data analysis viz frequency percentage mean standard deviation Pearson Chisquare t-test and ANOVA. Statistical analysis by used computer program. The finding reveal that 1) Most of the tourists are females aged 21 to 25 years old. They have a bachelors degree and most of them are students with monthly average income less than 10000 baht 2) The tourists have behavior of purchasing for handicrafts first is a metal product. The purpose or the reason to decide to buy the product is to use it yourself to purchase a product once a month. Most tourists decide to purchase immediately when they see the product. The average price is approximately 51 - 100 Baht. Tourists decide to purchase by themselves. 3) Tourists focus on the marketing mix factors used to make a purchase at the highest level and when considering each side found that there are 3levels at the highest level. Sort by descending from the average is product marketing and pricing. Tourists focus on distribution at a high level. 4) Relationship between personal factors and purchasing behavior on handicraft products of tourist Samut Songkhram Floating Market found that gender age education level occupation and monthly income were correlated with the purchas in g behavior of tourists in Samut Songkhram Floating Market at the level of 0.5. and 5) Comparison of the importance of marketing m ix factors used in decision making to buy handicraft products in Samut Songkhram Floating Market found thatgender educational levels and occupations of the tourists are important to the marketing mix used in the decision to buy handicraft products in Floating Market Samut Songkhram Province is different. The age and average income per month of different tourists are important to the marketing mix used in the decision to buy handicraft products in Floating Market Samut Songkhram Province is not different at the level of 0.05.

Today used of smartphone or mobile phone are popular for users who eager in new technology. Smartphone are similar to a small notebook that have many kinds of functions of mobile phone. Android is the popular operation that used in smartphone and mobile phone because it can be used to increase abilities with many applications that suitable with phones.

The purposes of this research were to investigate the factors consisted of a temperature different parts of the lemongrass and a size of chopped lemongrass that affected to distillation of lemongrass essential oils. There are two experiments in this work. The first experiment investigated the factors by defining 1) temperature at 105 oC and 110 oC 2) different parts of the lemongrass (Leaves and trunk) and 3) sizes of chopped lemongrass at 1-2 cm and 15-20 cm respectively. 2k Factorial designs method was used for this experiment. In the second experiment the appropriate parameters from experiment 1 were used for 3 replicates to find an average of lemongrass essential oils. The results of first experimental analysis showed that the appropriate parameters were temperature parts of the lemongrass and sizes of chopped lemongrass at 110 oC leaves and 1-2 cm respectively. For the result of experiment 2 it was found that the average of lemongrass essential oils was 30.36 ml.