The aim of this research is to design and create the sorting machine within the engineering knowledge by using the three-layer sieve set cylindrical sorting machine under the various conditions of experimental. Furthermore the Specific Energy Consumption [SEC] of Robusta coffee bean separates the standard size of Robusta coffee bean the total of product separated are regarded. For the experiment condition rotation speed adjustable to 9.6 and 14.4 rpm. The raw material flow through to sieve and determination the standard size for calculating the [SEC]. The result of experiment found that the average of total of product separated was 165.1 kg/hr. and 164.7 kg/hr or 99.57% from that were passed the criteria of standard according to the ministry of agriculture cooperative. In order to the [SEC] the cylindrical sorting machine was 0.01631 MJ/kg at 14.4 rpm of rotation speed. However the values of [SEC] may be change from the effect of rotation speed of sieve set.

The objectives of this research are: 1.To study the relationship between the general subjects scores and the students educational achievement. 2.To study the relationship between the general subjects scores and the students work achievement. 3.To study the relationship between students general subjects scores and their ethnical behavior. 4.To study the relationship between students general subjects scores in Social Science and/or Humanities and the students work achievement. 5.To study the relationship between students general subjects scores in Social Science and/or Humanities and the students ethnical behavior. The research data were from four sets of questionnaire. The first set was given to all student samples who were going to graduate in the 2/2542 academic year within the Center of Rajamangala Institute of Technology. The samples were from the stratified random sampling. The first set of questionnaire 230 items was brought back 100% completely. The second set of questionnaire was Qiven to teachers or advisors of the samples above. The third set of questionnaire was given to samples employees. The fourth set of questionnaire was given to the employed samples. Percentage Mean Pearsons Product Correlation Co-efficient and Multiple Regression were used for data analysis by the SPSS/PC+ The research findings are as follow: 1.Students achievement showed positive relation at the middle level to their general subject scores. 2.Students achievement showed non-relation to their general subject scores. 3.Students ethnicai behavior showed the very low level relation to their general subject scores and these two variables showed the opposite relation. 4.Students work achievement showed non-relation to the general scores in Social Science and/or Humanities. 5.Students ethnical behavior showed positive correlation to their general subject scores in Social Science and/or Humanities Moreover it was found that the students general subject scores in Social Science and/or Humanities could predict their ethnical behavior. Other variables showed non-significant difference to the prediction-equation at the alpha level of 0.05. Researchers proposed that all vocational faculties within The Center of Rajamangala Institute of Technology who would like to implant or promote the students ethnical behavior should organize their curriculum based on Social Science and/or Humanities especially the SUbjects on social and human behavior development i.e. Life and Social Skills Human Relations. Researchers proposed that there should have ongoing research about variables components patterns teaching methods and activities for each subject concerned to see the outcome of students ethnical behavior development. Moreover the repeated research should be done to compare the Rajamangala Institute of Technology students work achievement with the students from the other universities and there should have the study of relationship between students vocational subjects and their work achievement so that the findings should have been considered for the curriculum adjustment.

Diode high voltage the equipment assembles. That have necessity and important for a room practices for test experiment research and for the instruction. But diode high voltage to bring an element in a room practices something still must buy from the foreign countries and expensive. This problem corrects by designing and establish by oneself. This project has designed and build to diode high voltage for a laboratory by diode high voltage 100 kV. That can bring assemble all circuit get the circuit voltage multiplier etc. Building from the inventory at can seek can buy in house diode high voltage. That design and build that is the series diode on print circuit and electric oil insulator. Base principle of diode data technical of the components for applies in designing. The way builds to diode high voltage diagnose of designing builds consider the test diode high voltage the office designs. Which test has followed the objective is pass the power frequency withstand voltage test 120 kV 22 mA

This research is study about the factors that have relationship with Rajamangala University of Technology Phra Nakhon students discipline. This study is a surver research. Questionnaires is used as a tool in this study. The sample groups in this research were students Faculty of business administration 200 persons. The statistics by means of Arithmetic means percentage value and Chi-square. The results are as following : 1. Rajamangala University of Technology Phra Nakhon Students discipline Most of the students are behave follow the discipline in the high level. When compared in each items about study behavior and behavior with their friends found that most of the students behave follow the discipline in high level. The behavior about rules and regulations of student found that most of the students behave follow the rules an regulation in moderate level. 2. Factors that have relatjionship with Rajamangala University of Technology Phra Nakhon studentsdiscipline. Childcare family relationship and environment in the university have relationship with the behavior of students discipline which a statistical significance at.05. The gender factors were no statistics significant