The purpose of this research is to study the level of knowledge and understanding in democracy of the youths in Bangkok according to gender age education level family incomes occupation of the parents interesting level in political news and the participation in political activity. This research is a survey research. The sample groups are the 2500 youths who live in Bangkok metropolis persons from 50 districts by accidental sampling. Questionnaire is used as a tool in data collection. The statistics are means of percentage frequency arithmetic means standard deviation and Chi-square. The results are as the following: most of The have knowledge and understanding level in democracy at a moderate level. The factors affecting the knowledge and understanding which a statistical significance at .05 are age education level family incomes occupation of parents interesting level in political and participation in political activity.

A study on Dragon fruit variety and effects of fertilizer on yield and quality of Dragon fruit (Hylocereus undatus) was conducted at Rajamangala University of Technology Suvarnabhumi Huntra Ayutthaya from October 2008 to October 2012. The soil type condition was a clayey type (59% clay) containing very low amount of organic matter (0.79%) low phosphorus (3 ppm) but very high potassium (230 ppm). There were 12 varieties of Dragon fruit collected from all over Thailand for growth study and yield trial. It was found that the variety from Rayong Province which originally introduced from Vietnam gave the maximum yield (4164.25 kg/rai/year). Application of chemical fertilizer at the rate of 0 300 600 and 900 g/trellis/year was carried out to study the effects of fertilizer on growth and yield of Dragon fruit. The results have shown that the application of chemical fertilizer at the rate of 900 and 600 g/trellis/year gave better growth more flowers and fruits per trellis which resulted in maximum yield; 4230.75 and 4185.50 kg/rai/year respectively. The fertilizer application resulted in decreasing the texture firmness and total soluble solids but increasing the vitamin C content.

The colors improvement; lightness (L*) redness (a*) and yellowness (b*) in red swordtail fish by betalain (BTL) extracted from dragon fruit peel were evaluated. The fish were feed by commercial dietary pellet which spray with BTL; 0 40 and 60 milligrams/kilogram. After 8 weeks the average of L* a* and b* values of every treatment were not statistical significant (p>0.05) those might be cause from spirulina sp. added in commercial feed. The treatments were feed by 40 and 60 milligram/kilogram showed higher tendency of average L* a* and b* than 0 milligram/kilogram. The growth rate of every treatment were not statistical significant (p>0.05) and the survival rate of BTL intake groups were higher than without BTL. So BTL were not growth inhibit substance. In the other hands BTL might be the natural immune stimulation substance.

This research was aimed to study the compressive strength and the abrasion resistance of Terrazzo floor which used glass cullet as aggregate. The mix proportion of Terrazzo was 1 : 2.5 (white cement : chipped stone) by weight. The weight percentages of replacement of chipped stone by glass cullet were 0 10 25 50 75 and 100% by weight of aggregate. The compressive strength and abrasion resistance of Terrazzo specimens were measured at 7 14 and 28 days. The results indicated that the compressive strength of mixtures with glass cullet of 0 10 25 50 75 and 100% were 581.11 540.81 534.83 480.94 435.42 and 343.71 kg/cm2 respectively. It showed that the compressive strength decreased with the increase of glass cullet content. The abrasion test of Terrazzo specimens showed that at low glass cullet content (10-50%) the abrasion resistance increased with the increase of glass cullet content. The mixtures with glass cullet of 75 and 100% have abrasion resistance nearly the same as the mixture without glass cullet

The three types of Hamiltonian describing photon-photon and photon-phonon interactions within an optical ring resonator in which quantum noise in fiber optics is generated are given. The Markov-Born approximation and +P representation of photon states in phase space are used in order to eliminate the reservoir state variables by substituting all into the master equation to get the coresponding Fokker-Planck equation. The corresponding Langevin equation describing evolution of quantum states of an entangled photon is analyzed. The optimum results show that the occuring quantum noise can be reduced from the three main parameters where the surviving polarized entangled photon can propagate in the fiber optic system for a long time until photon processings are attained.