จำนวน Repository ( 9 )
Exciting permanent-magnetic-field affecting to the bean sprout growing
The purpose of the research was to study the exciting permanent-magnetic-field affecting to the Bean Sprout growing. The comparison of control-group (or unexcited seed) of the Chainat-72 seed and exposure-group seed where is the excited by the 1.6-Tesla permanent-magnetic-field of 15 30 45 and 60 min has been done. The exciting permanent-magnetic-field affecting to the Bean Sprout growing is analyzed by statistical analysis. The findings revealed that: by excited seed the maximum grow-up rate or average weight of Bean Sprouts was 24.82 %.
Detection of the transparency of air dried sheet rubber using solar cell module
The purposes of the research were; 1) to develop the detection of the transparency of air dried rubber sheet (ADS) using solar cell module 2) to find the average voltage according to the standard ADS grade market level and 3) to construct predictive equation of output voltage of the transparency machine. Samples of this study obtained by a purposive sampling technique was the standard ADS of 652 sheets. The instruments consisted of a multi-meter and transparency machine. For statistical analysis t-test (independent samples) and f-test (one-way ANOVA) were employed. The findings revealed that: 1) The ADS transparency machine consists of solar cell module at the error of 6% 2) The average voltage according to the standard ADS classify market level of 1 2 3 and 4 are 3.41 2.80 2.49 and 1.91 V. respectively 3) The market level and thickness of ADS altogether were the variables that could predict the output voltage of the transparency machine at 86.5 %
Current-mode quadrature sinusoidal oscillator using uperational transconductance amplifier (OTAs)
This paper presents a quadrature sinusoidal oscillator providing sinusoidal signal which differs in phase. The features of the proposed circuit can be electronically controlled. The proposed circuit consists of 4 operational transconductance amplifiers(OTAs) and 2 grounded capacitors which is able to control the oscillation frequency(OF) and condition of oscillation(CO). To confirm the performance and theory of proposed circuit is verified by PSPICE simulations and the experimental results can be achieved by using the commercial parts(LM13700s). The power consumption is about 33.3mW at supply voltages
Detection of the water added in raw milk using inter digital electrode
The objective of this study was to develop a technique for detection of the water added in raw milk using Inter Digital Electrode (IDE) other than using conventional methods such as determination of specific gravity or of the freezing point temperature and the compression on frozen samples. The assumption capacitance value of added water in raw milk will be varied with the quantities of added water. The experiment was performed by using a LCR (GW INSTEK LCR-817) meter to measure the capacitance value of milk contaminated water from 0 to 90% and electrodes which are normal and ground of different electrode number (N) of 7 10 and 13 width (W) of 1 and 2 mm. and length (L) of 10 20 30 40 and 50 mm. Results shown that the capacitance value of the water added in raw milk were lower than the raw milk without added water. Additional the W1L50N13G (W=1 mm. L=50 mm. N=13 and grounded) detects the water added in raw milk with R2 of 0.9904