No abstract

Infrastructure development is one of the sectors currently being pursued by the government to support the standard of living of the people, in order to lead to the era of globalization. In this context, various regions have been marked by the development of the residential sub-sector which aims to support smooth transportation, the economy from one region to another. To anticipate traffic flow on the Leung Daneun-Awe Geutah road, Peusangan Siblah Krueng District, Bireuen Regency. One way is to overlay or add thickness and smoothen the existing road surface, so that with this effort it can smoothen traffic density in Peusangan Siblah Krueng District with a length of STA 0+000 to STA 5+000 where the road length is 5 km with a road width of 9 meters, with work scheduling management for 34 days while the consultant's planning time is 58 days, the difference obtained is 24 days, thus the author's scheduling results are more effective than the consultant's planning time. In implementing this road project, it is necessary to have a method of dealing with and preventing problems in the field. In order to prevent various problems in the field, it is necessary to create a resource utilization program that includes programs for employee, equipment, materials, work methods and implementation.

Global warming that occurs due to rapid population growth and increasing of energy consumption makes energy supply decreases. Energy source from non-renewable energy (fossil fuel) cause increasing greenhouse gas emission level and scarcity of natural resources. This paper reports that agricultural residues especially areca palm wastes had been widely used as an alternative energy source to reducing fossil fuel consumption. About 4.780.000 tones areca palm produced per year around the world and the shell was burned in open air or just thrown in the environment. This work aimed to investigate energy potential from areca palm shell using direct combustion and pyrolysis method also do analysis about this technology from environmental point of view and that contribution for sustainable uses.

Betara's areca nuts are high quality areca nuts from Betara, Tanjung Jabung Barat, Jambi, Indonesia. Areca contains many nutrients and active compounds such as flavonoids, phenolics, catechin, quercetin, and a small percentage of tannins, beneficial for natural antioxidants. The natural antioxidants can be separated through Ultrasonic Assisted Extraction or UAE technique. The advantages of the UAE technique are that it uses low temperature, reduces solvent use, and is costeffective and quick. The ultrasonic waves in the UAE technique will accelerate the penetration of the liquid into the cell membrane wall so that the immediate release of active compounds. This study aims to determine the effect of excitation time on antioxidant activity in extracting antioxidants using the UAE method. The result showed that increasing excitation time increased the water content from 78% to 89% and increased the yield from 6.5% to 7.1%. The antioxidant activity (IC50) ranged from 4.9 to 3.5 ppm (db), suggesting that the areca nuts have a very high antioxidant activity.