Aplikasi dan Pelatihan Sistim "Silvofishery" Dalam Upaya Pemberdayaan Masyarakat Pelestari Hutan Mangrove di Desa Muara Reja Kecamatan Tegal, Kota Tegal

Hutan mangrove yang ditanam masyarakat di Desa Muara Reja Tegal, tujuan utamanya adalah untuk melindungi pantai dari abrasi. Dalam upaya memperdayakan masyarakat supaya dapat memetik hasil dari penghijauan adalah dengan memanfaatkan hutan tersebut tidak hanya sebagai pelindung pantai namun juga dapat menghasilkan. Alternatif yang tepat memanfaatkan magrove adalah pemeliharaan kepiting di daerah tersebut dengan konsep silvofishery Tujuan dari pengabdian ini adalah memberikan pengetahuan dan percontohan kepada masyarakat pelestari mangrove cara budidaya kepiting bakau dengan konsep silvofishery. Metoda yang digunakan adalah Parcipatory Action Research. Hasil kegiatan yang meliputi penyuluhan clan percontohan menunjukan 90% para peserta memahami materi yang diberikan, hal ini nampak pada respon, pada pertanyan dan keinginan untuk melakukan usaha tersebut. Keberhasilan budidaya kepiting dengan konsep silvofishery ini juga terlihat dari hasil panen yang sebagian besar kepiting bertelur dan semuanya bobotnya bertambah beret. Kegiatan pengabdian ini dapat disimpulkan masyarakat sangat tertarik terhadap konsep silvofishery dalam budidaya kepiting. SUMMARY The fundon of mangrove, which has planted by villages in Muara Reja, Tegal was to protect the coast abrasion. To empowering the villages in that location to get benefit from their activity in conserve mangrove are to culture mud crab in mangrove area with the silvofishery.method. The aims of the public services are inform and teach them on mud crab cultivation in mangrove area. The participatory action research was used in these activities. The result showed, 90% of all participant understand with the material was gave, It is shown on their respond where ask some question. The successful to cultivate mud crab with silvofishery concept showed on increasing weigh and maturation of mud crab. The result of this activity can be c ncluded, that the participant very interest to silvofishery concept

Effect of Welding Sequence and Welding Current on Distortion, Mechanical Properties and Metallurgical Observations of Orbital Pipe Welding on SS 316L

Orbital pipe welding was often used to manufacture piping systems. In orbital pipe welding, a major challenge is the welding torch's position during the welding process, so that additional methods are needed to overcome these challenges. This paper discusses the influence of welding sequence and welding current on distortion, mechanical properties and metallurgical observations in orbital pipe welding with SS 316L pipe square butt joints. The variation of the orbital pipe welding parameters used is welding current and welding sequence. The welding current used is 100 A, 110 A, and 120 A, while the welding sequence used is one sequence, two sequences, three sequences, and four sequences. The welding results will be analyzed from distortion measurement, mechanical properties test and metallurgical observations. Distortion measurements are made on the pipe before welding and after welding. Testing of mechanical properties includes tensile tests and microhardness tests, while metallurgical observations include macrostructure and microstructural observations. The results show that maximum axial distortion, transverse distortion, ovality, and taper occurred at a welding current of 120 A with four sequences of 445 µm, 300 µm, 195 µm, and 275 µm, respectively. The decrease in ultimate tensile strength is 51 % compared to the base metal's ultimate tensile strength. Horizontal and vertical microhardness tests show that welding with one sequence produces the greatest microhardness value, but there is a decrease in the microhardness value using welding with two to four sequences. Orbital pipe welding results in different depths of penetration at each pipe position. The largest and smallest depth of penetration was 4.11 mm and 1.60 mm, respectivel

Effect of Welding Sequence and Welding Current on Distortion, Mechanical Properties and Metallurgical Observations of Orbital Pipe Welding on SS 316L

Orbital pipe welding was often used to manufacture piping systems. In orbital pipe welding, a major challenge is the welding torch's position during the welding process, so that additional methods are needed to overcome these challenges. This paper discusses the influence of welding sequence and welding current on distortion, mechanical properties and metallurgical observations in orbital pipe welding with SS 316L pipe square butt joints. The variation of the orbital pipe welding parameters used is welding current and welding sequence. The welding current used is 100 A, 110 A, and 120 A, while the welding sequence used is one sequence, two sequences, three sequences, and four sequences. The welding results will be analyzed from distortion measurement, mechanical properties test and metallurgical observations. Distortion measurements are made on the pipe before welding and after welding. Testing of mechanical properties includes tensile tests and microhardness tests, while metallurgical observations include macrostructure and microstructural observations. The results show that maximum axial distortion, transverse distortion, ovality, and taper occurred at a welding current of 120 A with four sequences of 445 µm, 300 µm, 195 µm, and 275 µm, respectively. The decrease in ultimate tensile strength is 51 % compared to the base metal's ultimate tensile strength. Horizontal and vertical microhardness tests show that welding with one sequence produces the greatest microhardness value, but there is a decrease in the microhardness value using welding with two to four sequences. Orbital pipe welding results in different depths of penetration at each pipe position. The largest and smallest depth of penetration was 4.11 mm and 1.60 mm, respectivel

Pengaruh Medan Magnet Menginduksi Busur Pada Pengelasan Autogenous Tungsten Inert Gas Sambungan Tumpul Baja Tahan Karat 304

Dalam studi ini, penelitian mengenai penggunaan metode External Magnetic Field - Tungsten Inert Gas pada aplikasi sambungan tumpul dilakukan untuk mengetahui pengaruh dari pemampatan busur las terhadap kualitas hasil sambungan tumpul pelat tipis SS 304. Proses pengelasan ini dilakukan tanpa menggunakan logam pengisi tambahan (autogenous weld). Pada penelitian ini medan magnet luar ditimbulkan dengan meletakkan solenoid magnetik di sekeliling obor las TIG. Pengaktifkan medan elektromagnetik ini dilakukan secara dinamis dengan menggunakan mikrokontroler. Parameter pengelasan yang digunakan yaitu arus pengelasan 100; 105; 110 A dan kecepatan pengelasan 1,6; 1,8; 2,05 mm/s. Hasil penelitian ini menunjukkan bahwa pengelasan EMF-TIG dapat menghasilkan lebar manik yang lebih seragam di sepanjang jalur las dengan standar deviasi sebesar 0,08 dibandingkan dengan las TIG konvensional sebesar 0,12. Peningkatan kecepatan las sebesar 2,05 mm/s menyebabkan tidak berpengaruhnya penambahan medan magnet luar terhadap lebar manik las. Parameter arus 105 A dengan kecepatan 1,6; 1,8; 2,05 mm/s menghasilkan pemampatan lebar manik atas berturut- turut sebesar 0,87; 0,61; 0,1 mm. Parameter pengelasan dengan arus 105 A dan kecepatan las 1,6 mm/s memiliki efek pemampatan manik atas yang lebih besar yaitu sebesar 0,84 mm dibandingkan arus 110 A yaitu 0,38 mm