Carbon electrodes from coconut shell have been synthesized by addition of anionik surfactant of Sodium Dodecyl Sulfate (SDS) 1,5 M in the ball milling process. A chemical activation was performed by activator KOH for mass ratio of carbon and KOH was 1:4. Supercapacitor cells was fabricated by the spraying method on scrap paper as separator in the pressure of 8 kg/cm3. The spraying process was d…
Research has been conducted in order to determine sound absorption level from banana stem at different types as A1 (core banana of barangan), A2 (core banana of sweet), A3 (core banana of stone), A4 (The third mixture of core banana ) using the impedance tube is made of glass with size of 92 cm x 20 cm x 20 cm. Banana stem was used to processed into a square with size of 20 cm x 20 cm, the thic…
This research presents an activated carbon made from fibres of palm oil empty fruit bunches prepared by pre-carbonization and KOH activation. The activation was performedusing irradiation microwave process at various concentrations of KOH 1M, 2M, and 3M respectively.The physicalcharacteristicsof the activated carbon were represented byyield, methylene blue adsorption, cristalinity properties an…
A research has been done in distillation peat water using solar energy heaters concave reflector mirror with two variations of different containers, each container is made of aluminum, one painted black and the other without painted. Concave mirror reflector is made with a diameter of 2.2 meters, height of 0.3 meter mirror and its focal length of 1 meter. Reflector placed on the ground and lit …
Al-Ga co-doped ZnO nanostructures have been successfully grown using seed mediated growth hydrotermal method. The grown of Al-Ga co-doped ZnO nanostructures were used as an active material of DSSC. The growth of ZnO nanostructures has been done by varying percentage of concentration of the Al-Ga co-doped solution, namely Al 0.5, Al 1%, Al 1.5%, Al 2% with Ga 1% and Ga 0.25%, Ga 0.5%, Ga 0.75%, …
One of the Carbon plasma applications at atmospheric pressure is the production of Carbon Nano Tube (CNT) which is readily emerged experimentally. In this paper the initial process to generate Carbon plasma is investigated by using the electrode discharge at various pressures in thermal plasma condition. The Carbon plasma is produced by designing and operating the Direct Current voltage dischar…
Preparation and characterization of carbon electrodes from elephant grass flower have been successfully carried out. The preparation of carbon electrodes was begun with a pre-carbonization, grinding by a ball milling intrument and followed by sieving process. Variations in particle size was selected were : (a) smaller than 38 μm (SA) and (b) 39 μm up to 52 μm (SB). All samples were chemicall…
Activated carbon had succesfully been made from fibres of oil palm empty fruit bunches prepared by pre-carbonisation and KOH activation with microwave assisted process. The microwave irradiations power were varied by 450 watt, 540 watt, and 630 watt. The aim of this research was to study the characteristics of oil palm empty fruit bunches fibres as the activated carbon. The characteristics of a…
Research on the design and analysis of coils with geometry of square with sides of 12cm x12cm and the number of windings which varies namely 50, 150, and 300. The value of the magnetic induction generated by the coils was measured using a magnetic probe Pasco 2162 PS.- The value of the magnetic induction was measured as a function of distance, current, and the number of windings and then record…
Activated carbon had been made from sugar cane bagasse by pre-carbonization and chemical activation using ZnCl2 activator supported with microwave irradiation . Microwave irradiation time variated for 10 minutes, 15 minutes and 20 minutes. The purpose of the research to be cognizant of irradiation microwave time for activated carbon to evaluate adsorption of Pb, Fe, and Cu. Activated carbon wer…
Metamaterial simulation computationally is practice way for observing metamaterial which commonly achieves new metamaterial structures. This research investigates hexagonal-shaped metamaterial with gap and concentric double ring resonator, namely split ring resonator hexagonal-shaped (SRR-H). SRR-H metamaterial is optical metamaterial observing for frequency of 1 to 120 GHz. The simulation resu…
The title of this Thesis is "Medan area command to filling the proclamation and defending the independence of the Indonesian Republic at North Sumatera 1945-1947”. At the beginning of Indonesian independence the formation of military organization is an important thing to defend the independence during the revolutionary period of independence. That Military organization is called Komando Medan…
Indonesia is an anthropological country of 500 ethnic group language and culture features. Even more unique, earch of ethnic group has its own country of origin, historical experience and ancestry. In the countryside generates a variety of tradition that are very important and meaningful, but the villagers take the tradition as a regular thing that they routinely do and become something very va…