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This community service activity aims to plant mangrove tree seedlings that are expected to be used as pollutant absorbers and prevent seawater abrasion, educational facilities, carbon storage, and coastal tourism. The method used is by conducting lectures and direct practice by planting mangrove tree seedlings. This service activity is carried out in several stages including observation, coordination, execution, and evaluation. Observations were made by coming to Tirang Beach to determine the location for planting mangrove seedlings. tirang beach was chosen due to beach abrasion due to rising seawater and abrasion. The coordination stage is carried out by the community service team together with the Tirang beach manager. The aim is to coordinate so that community service activities can run smoothly and on target. The execution was carried out by planting mangrove tree seedlings on the beach, especially those affected by abrasion. While the evaluation is by looking at the deficiencies that were carried out during community service activities. The activity of planting mangrove trees is beneficial for increasing public awareness of environmental concerns by planting trees and for reducing greenhouse gas emissions so as to reduce impact global warming.

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PT. AIC uses a manual system in engine maintenance management. This makes it difficult to access in measuring the rate of damage, for acceleration information in maintenance management. This problem requires an identification to provide an effective machine maintenance management information system. The MTBF value will be able to detect machine damage, especially the piccanol gamma loom machine. The MTBF value can see the damage to the machine by looking at the condition of the machine, the data history of machine damage, the number of machine failures that occurred in a certain period. The MTBF value of the machine can control the reliability and know the life of the machine. Action maintenance can be done before the machine is damaged. After calculating the MTBF value of the piccanol gamma loom machine, it is still relatively small so the machine is still often damaged.

Metal Matrix Composite Method (MMC) menjadi bahan pertimbangan setiap peneliti dalam melakukan pengecoran. Atau sering disebut dengan pencampuran matrik paduan dan matrik murni untuk menghasilkan bahan campuran yang lebih baik. Sifat aluminium yang ringan, tahan terhadap korosi serta mudah dibentuk, aluminium banyak dipergunakan untuk beberapa penelitian dan produksi, namun dari beberapa proses pengecoran banyak sekali kendala untuk pencampuran matrik Al dan beberapa matrik lainnya. Maka dalam penelitian ini penulis mencoba dengan Proses Stir Casting agar mendapat hasil yang homogen dalam pencampuran SiC dengan komposit Al7Si dengan diberi serbuk SiC dengan penambahan 5%, 7,5% dan 10% sebagai penguat. Serbuk SiC mempunyai sifat yang tidak homogen dengan permukaan SiC yang tidak bisa membasahi oleh matrik cair. Selain SiC sebagai penguat pada penelitian ini juga menambahkan TiB 1% yang berfungsi penghalus butir. Dari penelitian ini penulis melakukan beberapa pengujian untuk mengetahui hasil dari pencampuran matrik yang ada. Pengujian yang dilakukan stru ktur mikro, densitas, kekerasan dan potensial.