This paper examines filter component impact on inverter output. The inverter prototype was designed by using pulse width modulation (PWM) signal generated by EGS002 module, combined with DC voltage source, voltage regulator, MOSFET bridge and low pass filter. As component assembled, the output voltage quality is determined by the choice of filter components. Experiment shows that the calculated values may not suitable as soldering and connection imperfection may change component values. As adjustments were performed, filter components of 12.63 H and 6.5uf generated the finest sinusoidal output of 30.8 Vpp with frequency of 50,05 Hz.

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The chemical and physical quality of broiler breast meat usually be improved by soaking the meat in a solution of cooking spices, but in here, the spices is used a solution were given to drinking water. This study aims to know its effect on the pH value, water content, fat content, and cooking loss. The design of research used a CRD with 9 treatments and 3 replications. The treatment given was broiler drinking water with the addition of: K0 (control); K1-K4 as afermented and K5-K8 is a boiled of cooking spice solution. The total use of various cooking spice is 125 g/L of mixing water of the broilers daily drinking water needs. The result of Anova showed that the addition of cooking spice had a very significanteffect on the levels of pH, water content, fat content and cooking loss of broiler meat. It can be concluded that the use of cooking spices especially based on garlic and Kaempferia galanga can be used during broiler rearing as a feed additive to improve meat quality in drinking water because it is effective in reducing pH, water, fat content and cooking losses.

Microstrip antenna is one of the most applied antennas for various radio applications as its low profile and high performances. This paper discusses design and simulation of the rectangular patch microstrip antenna (RPMA) for S-band radio by using inset feeding. Initially, theoretical calculation was performed, followed by performance evaluation by using AWR simulator. Inset deep iterations were conducted through repeated simulation adjustment to obtain optimal design. Based on the concluded simulation adjustment, the minimum achieved VSWR is 1.056 to get bandwidth of 104.5 MHz (3.1636 – 3.2681 GHz). The minimum return loss that can be achieved is -31.33 dB with gain of 5.777 dB.

The study of CO2 removal from air-CO2 mixture using coal fly ash (CFA) based adsorbent has been conducted. The sieved CFA was calcined at various temperature (200, 300 and 400 °C) for 4 hours. The calcined adsorbent pellets were characterized before utilizing in CO2 removal. Result suggested that calcination temperature slightly affected the yield of adsorbents. Increasing calcination temperature decreased the density and bulk density; but increased the percentage of adsorbed moisture of the adsorbents. SEM micrograph revealed various shape and size of the adsorbent and matched the result of XRD pattern and EDS analysis. The characterized adsorbents then were utilized to remove CO2 in an adsorption column. The inlet mixture contained 35%-vol of CO2 with flow rate of mixed gas of 200 ml/min. The highest removal was accomplished by using CFA based adsorbent pellet with particle size of 140 mesh, calcination temperature 300 °C for 4 hours. The CO2 removal efficiency was 71.43% with adsorbent capacity of 8.027 mg CO2/g adsorbent.