Dalam masyarakat konsumen Indonesia yang sebagian besar adalah Muslim, produk bersertifikat halal menjadi standar yang awam diminta oleh stakeholder, sebagai contoh: distributor produk, karena berkaitan dengan penerimaan publik. Sayangnya, produk Usaha Mikro, Kecil, dan Menengah (UMKM) dan home industry pada umumnya masih belum memperhatikan pentingnya pemenuhan standar halal atau memiliki keterbatasan untuk mengakses informasi mengenai sertifikasi halal. Menjawab permasalahan tersebut, kegiatan pengabdian masyarakat ini ditujukan untuk meningkatkan meningkatankan kesadaran akan pentingnya kehalalan produk dengan memberikan wawasan dan edukasi mengenai sistem jaminan halal. Objek yang menjadi fokusan adalah masyarakat pesisir penggerak ekonomi kreatif atau home industry untuk daerah-daerah pesisir.
In presence of complex-hydrodynamic interaction between water wave and moving structure, a reliable method that can analyse nonlinear phenomena is necessarily required. This paper presents numerical investigation of a moored floating breakwater using computational fluid dynamic (CFD) approach. The mathematical model is based on the extended Reynolds Average Navier-Stokes (RANS) solver for solid-porous obstacle. A high amplitude wave with several wave periods were deliberately considered in the simulation to allow nonlinear wave effects on the floating structure such as wave breaking, overtopping, including viscous friction. Here, the two fluid calculation method for interface boundary between water and air is proposed to capture the complex free surface changes. In addition, the fractional average volume obstacle representation (FAVOR) using partial cell treatment method is employed to simulate the motion of breakwater boundary on the free surface. Approximations and validations on the hydrodynamic properties of the structure have been carried out which include wave transmission coefficient, sway, heave, pitch, and mooring forces. The results show that the CFD model can fairly simulate well on hydrodynamics of the floating breakwater. The discrepancies between numerical and experimental data can be partly attributed to the nonlinearity in the incident wave definition.
⎯The Surabaya coast is a strategic area for sustainable development. For example, Teluk Lamong Harbor was built using reclamation. The port can be a solution but also has a coastal ecological impact. Therefore, a study of the coastline and distribution of the TSS was carried out around the Lamong Bay area. Based on the analysis of shoreline changes, the addition in the west (Kali Lamong) with NSM and EPR reached 166 m and 16.6 m/year and in the east, there was an addition (Osowilangon) with NSM and EPR reaching 337 m and 33.7 m/year. Based on TSS analysis by satellite, TSS in 2012 in the east had an average of 28.42 mg/L, increasing in 2017 to 36.39 mg/L, increasing again in 2022 with a value of 38.46 mg/L. While in the west in 2012, the high TSS had an average concentration of 40.95 mg/L, increasing in 2017 to 44.57 mg/L, increasing again in 2022 with a value of 52.68 mg/L. The modeling results show that the average TSS (west) in 2012 is ±20 mg/L, while in 2022 it is ±60 mg/L. In the east port, the average concentration of TSS in 2012 and 2022 did not change significantly (±20 mg/L).
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