The objective of this study aims to develop a concrete boat by using lightweight concrete. The use of granular foam replaced the aggregate in various quantities to reduce the weight of boat. The replacement ratios of aggregate by the granular foam were 0 25 50 75 and 100% by volume of aggregate. The test results of compressive strength tensile strength modulus of rupture and unit weight of concrete were used to find out the appropriate mixture for producing the concrete boat. The results indicated that the appropriate mixture for producing concrete boat was the replacement of aggregate by granular foam at 100% which had the compressive strength at 28 days of 50.59 kg/cm2 and the unit weight was 949.71 kg/m3. The weight of lightweight concrete was lighter than the normal concrete about 57%. The prototype of lightweight concrete boat which had 1.04 m wide 2.20 m long and 0.38 m height had about 50 kg of weight. The maximum weight capacity of the boat was 240 kg. The cost of a lightweight concrete boat was about 650 baht

This experiment was conducted to study on single cell protein production from copra meal residue by Saccharomyces cerevisiae and Bacillus subtilis as animal feedstuffs. The experimental design was 4x3 factorial in CRD experiment with two factors were design to experiment. The first factor was comprised of fermented period (0 15 30 and 45 days). While the second factor B was comprised of microorganism type (Saccharomyces cerevisiae Bacillus subtilis and Saccharomyces cerevisiae combined with Bacillus subtilis). The results showed that interaction between factor A and B on pH (4.00-4.53) and percentage yield (29.21-33.80) were highly significantly different (P<0.01). However Incubation temperature were not related between factor A and B. Additional both factor have no effect to incubation temperature (P?0.05). For nutrients composition the group was fermented Saccharomyces cerevisiae combined with Bacillus subtilis showed higher Crude Protein than other treatments (P<0.01). Optimum of period at days 45 showed that crude protein 14.77 percent was significantly (P<0.01) and pepsin digestibility 66.60 percent was significantly (p<0.01)

A comparative study. The purpose was to study the costs and the cost of return. Comparative analysis of the difference between revenue and the cost of return breakeven Between brackish and salt water fish white snapper. This study used data from interviews with of 24 cases. The period 6% of Interest rate of study 5-year. - A study of the brackish cost per acre was 355127.00 baht Salt water 31556.34 baht cost was 850784.15 baht Salt water 788305.00 baht Income yield 1914250.00 baht. and Salt water 1908750.00 baht. the cost according to the net present value (NPV) were positive value equal 620881.68 baht Salt water 628974.65 baht and the internal rate of return (IRR) 16.95% Salt water 17.45 % with a payback period of 1 year 9 months 6 days Salt water 1year 8 months 4 days and the breakeven point is equal to 96529.25 baht Salt water 86643.80 Baht. - The salt water yield worthwhile than brackish water.

This research was aimed to study the effect of binders on cracking behavior of high strength concrete under restrained shrinkage condition. The cracking behaviors of concrete that study were cracking age in uniaxially restrained shrinkage test shrinkage rate free shrinkage crack propagation and strength of concrete. The binders used in this study were fly ash and limestone powder. The weight percentage of replacement of cement by fly ash and limestone powder were 30 and 10% respectively. The water to binder ratios was 0.35. The results indicated that the influence parameters of shrinkage cracking were type of binder amount of free shrinkage shrinkage rate and tensile creep of concrete. The use of fly ash and limestone powder could reduce free shrinkage and shrinkage rate of concrete and result in the longer cracking age than cement-only concrete. The tensile creep of cement-only concrete was higher than that of limestone powder concrete and fly ash concrete respectively

This paper presents a mathematical modelling for design the control system of a liquid. The system are consists of one and two tanks of a liquid. To confirm the achieved mathematical modelling is used to design P PI PD and PID controller in the frequency domain. The experimental results are indicated as the following. An one tank of a liquid controlling The controller can be control the liquid level to set point with in 100s. In the case of a disturbance occurs in the system it is perform by drain a liquid. As same as the controller it can be control the liquid level into the steady state. In the part of the liquid control this is the interaction between two tanks. The experimental results of the system operation the controller can be control the liquid into the set point both occur disturbance and without disturbance respectively