The aim of the study was to analyze the dynamic response along an aluminum cantilever beam. The data measured were displacement (mm), velocity (mm / s), and acceleration (m/s2) with 3 variations of the measurement position on the beam. The 6061 series aluminum beam used have length: 80 cm, height: 32 cm, and width: 32 cm. Data were collected experimentally using a vibration meter to measure beam vibrations at the various positions from the cantilever beam at a distance from support: 10 cm, 35 cm, and 60 cm. The results of the analysis showed that the values ​​of the displacement, velocity and acceleration of the object vibrations change when the measuring point was far from the cantilever support. The maximum displacement value is at 60 cm from the support: 0.02 mm, and the lowest is at 10 cm: 0.12 mm. The velocity value also increases, maximum at 60 cm from the support: 38.58 mm/s and the minimum value at 10 cm: 12.30 mm/s. While the acceleration value, the maximum at 60 cm from the support: 91150 mm/s2 and the minimum at 10 cm: 66900 mm/s2.

Potentials  of Rice Waste as Alternative Energy Sources in Southeast Sulawesi Province. The purpose of this study is to analyze the energy potential of rice processing waste (rice straw and rice husk) in the province of Southeast Sulawesi. Grain production data used the results of the Central Statistics Agency of Southeast Sulawesi publication as well as the Central Statistics Agency of the Regency / municipality of Southeast Sulawesi. To determine the pattern of utilization of rice processing waste at the farm level, the research team conducted a survey in several locations that produce rice in Southeast Sulawesi Province. The data used for analysis were grain production in 2010 – 2018. Based on the grain production, rice straw and rice husk production were calculated, then the energy potential of the two rice processing wastes can be determined. The results of the analysis show that the average production of rice straw was 823, 665 tons; rice husk was 119,289 tons, estimated energy potential of rice straw = 9,600GJ / year and rice husk = 1,700 GJ /year

Handling of used aluminum has been carried out by collectors, namely the compression process. The pressing process is less economical because it still produces cavities and the selling price is low. The purpose of this community service activity is to provide training on Aluminum smelting with casting techniques for two groups of independent collectors, Mandiri Berkah and Maju Jaya. The activity took place in the Mandiri Berkah collector area which was attended by Mandiri Berkah and Maju Jaya employees and the community around Poasia. The method of implementing the activity is a theoretical explanation of Aluminum and its processing method with casting techniques. Used aluminum cans are melted in a charcoal-fired crucible furnace. The used aluminum cans are put in the kowi which is placed in a hot furnace. After the cans are melted, they are poured into rectangular molds. The results of the service activities that resulted were the opening of knowledge insights related to used aluminum. Participants were able to recycle Aluminum by casting technique into ingot products.Keywords: Training, foundry, aluminum, collectors

Tujuan dari penelitian ini adalah untuk mengetahui total intensitas radiasi matahari dan mengetahui presentase radiasi normal dan difusi. Penelitian ini menggunakan dua metode, pertama adalah pendekatan secara teori dan kedua adalah pengukuran langsung. Alat  yang digunakan dalam pengukuran langsung yaitu Solar Power Meter (SPM), untuk mengukur intensitas radiasi total matahari, dan GPS untuk mengetahui koordinat lintang dan bujur serta ketinggian dari permukaan laut . Radiasi matahari dihitung dari pukul 07.00 sampai 17.00. Hasil pengukuran langsung menunjukkan bahwa nilai intensitas radiasi matahari tertinggi pada pukul 12:00  dengan nilai intensitas matahari  870,5 W/m2 dan terendah pada pukul 17:00 dengan nilai intensitas radiasi matahari 79,5 W/m2.  Untuk pendekatan teori diperoleh nilai radiasi matahari tertinggi pada  pukul 12:00  dengan nilai intensitas matahari 953,15 W/m2 dan terendah pada pukul 7:00 dengan nilai intensitas radiasi matahari 143,98 W/m2. Nilai radiasi sorot dan difusi ditentukan dengan  perhitungan teori, dimana besar radiasi sorot tertinggi pada  pukul 12:00  dengan nilai intensitas matahari  835,09 W/m2 dan terendah pada pukul 7:00   dengan nilai intensitas radiasi matahari  82,93 W/m2.  Nilai radiasi difusi tertinggi pada  pukul 12:00  dengan nilai intensitas matahari  118,06 W/m2 dan terendah pada pukul 07:00 nilai intensitas radiasi matahari 61,06 W/m2.  Radiasi sorot memberi 83,5 % intensitas radiasi matahari dan 16,2 % diperoleh dari  radiasi difusi.  Kata Kunci : Energi Matahari, Pengukuran Langsung, Pendekatan Teori.

The use of microwave energy for drying of agricultural products is recently developed due to the advantageous of heating the product much faster and more effective than conventional methods. Moisture content of agricultural product should be evaporated immediately after harvesting in order to inhibit microbial growth and decrease enzymes activity. This work aim to investigate characteristics of microwave-solar hot air drying of agricultural products such as rice grain and potato using a commercial microwave oven and hot air from a can solar collector. A domestic microwave oven was modified in order to operate as a microwave dryer device. The state of the art of microwave-solar heating was developed for investigation on drying performance of agricultural products such as grains and potato slices. Measurements on the temperature of drying chamber and moisture content of the product were conducted under different power inputs of microwave (low, middle and high) and intensity of solar drying. It was observed that microwave-solar air dryer proposed good heating performance and quality of products. Furthermore, temperature, moisture changes and drying rate could be controlled during the drying process.