This research aims to study about media exposure knowledge attitude and volunteer spirit behavior of the teenagers in Bangkok. Comparison of the demographic characteristics with volunteer spirit behavior and the relations between media exposure knowledge attitude with volunteer spirit behavior of the teenagers in Bangkok. The results of the study were as followed: 1. The Teenagers in Bangkok who are different in demographic characteristics (gender age education level years subjects of study university income residential and family characteristics) has a different volunteer spirit behavior. 2. Media exposure and volunteer spirit attitudes correlated positively with volunteer spirit behavior in the middle level relations. While knowledge of volunteer spirit correlated negatively with volunteer spirit behavior in the low level relations. Moreover the sample exposured the contents of volunteer spirit on the internet is the most 58.2 percent. The sample has knowledge about the volunteer spirit in the middle level. Good attitude in volunteer spirit activities and the sample had a volunteer spirit behavior in the middle level.

The objective of this study is to compare three forecasting methods on three agricultural products consisting of fresh whole chicken (include bone no entrails) red meat pork hip section and Jasmine rice. These methods are Simple Exponential Smoothing method Holt’s method and Winter’s method. Data are colleced for a period of 60 months from January 2007 to December 2011. The most suitable forecasting method are the one that shows no residual autocorrelation and gives the lowest MSE MAPE. The results show that Simple Exponential Smoothing method is the most suitable method on three agricultural products due to this method reveals no residual autocorrelation and displays the lowest MSE MAPE.

The objective of this research is to construct the appropriate forecasting model for the export quantity of concentrated latex by the three time series analysis methods which are Box-Jenkins method Winters’ multiplicative exponential smoothing method and combined forecasting method. Time series data from the website of Office of Agricultural Economics during January 1998 to February 2014 (194 values) are used and divided into two series. The first 182 values from January 1998 until February 2013 for the models prediction and the last 12 values from March 2013 until February 2014 for comparison the performance of forecasting models via the criterion of the lowest root mean squared error and the criterion of the highest correlation coefficient between existing values and forecasted values. Research findings indicated that for all forecasting methods that have been studied the most powerful method is the combined forecasting and the forecasting model is where and represent the single forecasts at time t from Box-Jenkins method and Winters’ multiplicative exponential smoothing method respectively.

This research is the quantitative research under which data are gathered from Rajamangala University of Technology’s students in Bangkok of 420 persons. Data analysis statistics are frequency percentage mean sum and research question test by correlation statistics. The level of significance is .05. The results of the research are as follows: 1. Rajamangala University of Technology’s students in Bangkok conversed with friends mostly on the issue of political information and exposed political information via media of television receiver most to follow up political events and information including the matter that the students are knowledgeable on politics in high level which in this respect their knowledge on the duty of the people is in the highest level and their political participations are in the moderate level by having the participations in the activity of local level election voting most. 2. The media exposure for use in conversing information on political issue has negative relations with the knowledge on politics current constitution persons eligible for voting and knowledge relating to the right in the democratic system and the media exposure for use on the follow-ups of political events and information has negative relations with the knowledge on politics and current constitution but the relations with the knowledge on the political party removal of the National Assembly Members and persons eligible for voting is positive. 3. The media exposure for use in conversing political information has the positive relations with the political participations grouping for conservation and revival of traditions and customs local wisdoms etc. and the media exposure for use in the follow-ups of political events and information has the negative relations with the political participations the participation to express opinions with the Advisory Council or other independent Organizations participation in an activity a meeting an election campaign with a political party a participation in the meeting political campaign and movement and a support to a politician/political party.