The purposes of this research were to (1) investigate factors which have impacts on working-age people’s decision making to save money in Bangyai district Nonthaburi Province (2) study working-age people’ behavior in decision making to saving money in Bangyai district Nonthaburi Province (3) compare the importance of factors that affect to the working-age people’s decision making in saving money in Bangyai district Nonthaburi Province.The sample of the study consists of 400 people (ages 20-60 years old). The research instruments used for data collection were the questionnaire. The reliability data were analyzed by using frequency percentage means and standard deviation of t-test (Independent t-test) F-test (Independent sample F-test) and Content Analysis. The results of the study revealed that: The mainly respondents are female being over 30-40 years old having single status and education background in bachelor degree. Moreover the respondents are working as an employee of the private company the average income per month over 10000-20000 baht and family members around 3-4 people. The respondents pointed out similar saving money to use after retirement and deposit with banks in short term saving. The respondents will spend first then keep the rest of the money to saving and they have money savings less than 10%. The working-age people’s decision making to save money in Bangyai district Nonthaburi Province was at a moderate level. Two factors of decision to saving (1) income from savings and (2) saving characteristics were at a high level. Besides four factors of decision to saving (1) security (2) yield upon investment (3) incentives for saving and (4) social and economy were at a moderate level. There was low positive statistical significant relationship between the differences of age marital status education level occupation average monthly income family members purposes of saving savings schemes and factors affecting working–age people’s decision to saving at 0.05 However the respondents who have the differences of gender period of saving saving method and saving ratio focused on the factors of decision to saving at no difference.

This research work was to study the effect of moisture on mechanical properties of wood/polyvinylchloride composites (WPVC). WPVC specimens in ratio of PVC and wood (100:100 by weight) were prepared by using twin screw extruder. The water conditions for WPVC specimen immersion testing were varied for temperatures of 30-70 oC and specimen immersion time of 0-120 h. The moisture effect was investigated by measuring flexural properties and hardness of WPVC as comparing with case of PVC specimen. The result suggested that flexural modulus of WPVC tended to decrease with increasing time of water immersion and then remained unchanged at immersion time of more than 72 and 48 h for water temperature of 30 and 70 oC respectively. The decrease rate in flexural modulus enhanced when water temperature increased. Flexural modulus of PVC slightly changed with increasing both immersion time and water temperature. Flexural strength for both PVC and WPVC specimens were found the change at water temperature of 70 oC only. Flexural strength of PVC tended to slightly increase with increasing immersion time whereas flexural strength of WPVC slightly decreased with increasing immersion time. Hardness of PVC specimen in cases of both water temperature of 30 and 70 oC slightly increased with increasing immersion time. For WPVC hardness tended to decrease with increasing immersion time and water temperature.

Podostemaceae a family of aquatic flowering plant restricted to river rapids and waterfalls are widely reported to be the high incidence of endemism and in need for conservation. The present study analyses endemism and conservation status of the Podostemaceae in northeastern floristic region Thailand using past and current taxonomic records personal field collections geographic ranges IUCN assessment and a combination of river number in which a species occurs. The plants grown in one river and two rivers are considered as narrow endemic species. Among the six genera and 22 species recognized two genera are endemic eighteen species are endemic to Thailand eleven species of the 18 are narrowly distributed and confined in northeastern floristic region and the other 4 species are not endemic. Considering the conservation status two species are classified as Critically Endangered distributed in a single river ten species as Vulnerable distributed in 1-2 rivers six species as Near Threatened two species as Least Concern and two species as Data Deficient. Loei province is the most species-rich area in Thailand with 12 species five of them are restricted in Loei.

The aim of this research was to study the solid waste management in Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon study problems and obstacles of the solid waste management. The study will benefit related organizations as fundamental information for setting plans on the solid waste management to ensure the maximum efficiency and expand to other faculties. In this study a researcher collected quantitative data and also characteristics of solid waste occurred. Total amounts of solid waste were approximately 20.86 kilograms per day. Types of solid waste mostly found were reuse /recycle wastes (10.21 kilograms per day) and organic wastes (10.43 kilograms per day). The results showed an information for developing solid waste management under 3R processes (Reduce Reuse and Recycle) lead to sustainable solid waste management and efficiency.

The shallow water model is a mathematical model was developed from the shallow water equations. It consists of the continuous flow and the momentum equation of non-linear in the x-axis and y-axis. The boundary conditions of the model is the cyclic continuity from east to west and the open boundary conditions from north to south. The northeast monsoon forecast by the shallow water model can’t be predicted in a long time period because the boundary conditions of the model has a problem. Thus improvement the boundary conditions of shallow water model by using wall boundary condition from north to south. The results of this research to found that the shallow water model can correctly forecast the northeast monsoon period in the long term.