The objectives of this research are: to study the characteristics of students in the Faculty of Engineering at Rajamangala University of Technology Pra Nakorn North Bangkok Campus that influence to the risk of withdrawal from Calculus 2 for Engineers; to predict the risk of withdrawal from Calculus 2 for Engineers; and to use the results of the study for planning and solving the problems of withdrawal from Calculus 2 for Engineers. The sample is 226 students in the Faculty of Engineering at Rajamangala University of Technology who enrolled the Calculus 2 for engineers in the second semester of the academic year 2009. The data are from the questionnaire. The factors considered are grad point average the number of enrollments for the Calculus 1 for engineers Calculus 1 for Engineers grade the number of courses that emphasize on calculation that were enrolled in the second semester of the academic year 2009 the sacrifices of students for the Calculus 2 for Engineers course and the need to withdraw from Calculus 2 for Engineers course before other courses. The logistic regression model in which the parameters are estimated by using Bayesian methods is used for analyzing the data. The study shows that the factors that influence to the risk of withdrawal from the Calculus 2 for Engineers are grade point average Calculus 1 for Engineers grade the number of courses that emphasize on calculation that were enrolled in the second semester of the academic year 2009 and the sacrifices of students for the Calculus 2 for Engineers and the need to withdraw from Calculus 2 for Engineers before other courses. The factor that does not influence to the risk of withdrawal from the Calculus 2 for Engineers is the number of enrollments for the Calculus 1 for Engineers.

The purpose of this research were to develop the efficiency of Computer Assisted Instruction (CAI) in Bio – Organic chemistry and to compare the leaming achievement in Bio – Organic chemistry the sample consisted of 35 and 39 student in Department of Food and Nutrition Faculty of Home Economic Technology Ragamangala University of Technology Phra Nokhon 2008 academic year. Research instrument were the CAI and Achievement test in Bio – Organic Chemistry in Carbohydrate. The achievement test comprised 40 item. The data analyzed by statistical computer program. And used mean percentage and compare mean by t-test

According to my research that follow a purpose for educated variable of design and a mould building pattern. Bulging letters on a smooth sheet keyboard for produce a supply data device for comfortable to supply data by touching. Reduce use your eyes for looking on keyboard and help to relax your hands muscle from typing. From example in 50 people statistics that use analysis data the percentage the stan4ard deviate value t-test value. From research result design and a mould building pattern build from bulging letters on keyboard lumps from a copper mould building. This use metal that pass Electrical Discharge Machining Technology: EDM pump on Silicon and fume by heat for silicon freezing. Produce process consist of Lathe Milling Drilling Grinding Wire Cutting Machine Cutting Edge Grinding Wheel and Assembly and Fitting that use with NC and CNC (Numerical Control and Computerized Numerical Control) Software that use to control machine consist of CAD (Computer Aided Design) that use for writing and CAM (Computer Aided Manufacturing). the use of puffed up alphabet keyboard research because of knobs on the keyboard made of Silicone has soft and bend follow the characteristic of that alphabet. When you place fingers on the keyboard the movement of fingers tip from fondle the location of alphabets for check the difference between each alphabet. From the result people who are expert or have fast for touch screen typing test to find thee difference of seeing the keyboard before use of typing practice program use finger tip for fondle type of each alphabet. In case of people who cannot remember alphabet s keyboard they will adjust the movement of finger tip for realize and have accurate location of alphabet for correction of location of finger that place for reduce wrong typing and reduce seeing of keyboard accordingly to help to allow the comfortable from putting the data by touch screen system Keyword : keyboard ldata enter equipment I knob keyboard Isilicone I puffed up alphabet I block pattern! puffed up typing Itouch screen typing