This study investigates the impact of composite materials consisting of Polycaprolactone (PCL), Magnesium (Mg), and Hydroxyapatite (HA) on the strength and degradation ability of synthetic bone grafts. These materials are mixed in various proportions, namely 90% PCL, 70% PCL 50% PCL, using chloroform as a solvent. The primary aim is to produce artificial bone grafts that closely mimic the chara…
The Banyuasin River Estuary is formed by the confluence of two rivers, the Banyuasin and Lalan Rivers, located in South Sumatra Province. This estuarine area also serves as a discharge site for industrial and domestic waste and is influenced by various human activities in the surrounding area. This study aims to analyze the sediment characteristics and organic carbon content in the waters of th…
Penelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur terhadap nilai kekerasan material menggunakan mesin uji Vickers pada baja ST 42 yang telah diberi perlakuan Normalizing. Metode penelitian yang digunakan adalah metode penelitian eksperimental dengan tujuan mengetahui sebab akibat berdasarkan percobaan yang dilakukan secara langsung atas perlakuan yang diberikan. Variasi temp…
This study aims to analyse the impact of speed and polishing time variations on the microstructure and hardness of AISI 1020 steel produced by Shielded Metal Arc Welding (SMAW). Steel specimens were welded using E7016 electrodes, then polished at speeds of 570 rpm, 750 rpm, and 1043 rpm for 5, 10, and 15 minutes. Evaluation was carried out by observing the microstructure using an optical micros…
This study aims to determine the effect of polishing speed and time on the microstructure and hardness of AISI 304 type stainless steel material that has gone through the Shielded Metal Arc Welding (SMAW) method welding process. The main focus of this research is to evaluate how polishing parameters affect surface quality, microstructure appearzmce, and hardness values in the fusion zone, fusio…
This study aims to (1) determine the effect of electrode storage conditions on the resulting welding defects, (2) determine the effect of different electrode storage locations on welding results, and (3) determine what types of welding defects are produced by E7018 electrodes that have been given several treatments. The method used in this study is an experiment, the number of samples made as m…
Penggunaan dan pemanfaatan serat alam pada saat ini sudah semakin berkembang, khususnya material komposit. Material komposit sendiri tersusun atas dua material atau lebih yang berbeda sehingga perpaduan dari material tersebut diharapkan dapat membentuk material baru yang memiliki sifat-sifat khusus, dimana salah satu dari material gabungan tersebut dinamakan penguat dan material lainnya disebut…
Composite is a combination of two or more different materials to obtain materials with physical properties and mechanical properties better than any of its constituent components. This study aims to analyze the mechanical properties and physical properties of the composite polyester reinforced silica carbides particles are included in the Composite particles mechanical properties and physical p…
Biofloc technology is a system of utilizing inorganic nitrogen waste with probiotic bacteria so that it can be eaten by fish. One important component in biofloc is a carbon source such as molasses. However, the use of molasses as a carbon source is difficult to obtain. Therefore, alternative carbon sources are needed, one of which is tapioca starch. This study aims to determine the effect of th…
Oil palm (Elaeis guineensis Jacq.) is an annual crop that has the potential to absorb carbon emissions. In oil palm plantations, it is common to find weeds of various species that grow under stands of oil palm trees (understory). Undergrowth in oil palm plantations can be a land cover plant as well as a significant carbon store in addition to oil palm plants themselves. This study aims to deter…
Peatlands have great potential for carbon storage but are vulnerable to degradation due to land conversion and fires, which increase carbon emissions into the atmosphere. Oil palm (Elaeis guineensis Jacq.) Can absorb carbon through photosynthesis and store it in biomass. This study aims to estimate the amount of carbon stored in 10 years old oil palm trees in the peatlands of PT. Waimusi Agroin…
Fly ash is a solid waste generated from the coal combustion at the electrical generator. Commonly, the waste of the coal combustion was indulged floating in the atmosphere and disposed of as a pile. This problem causes bad effect for the environment and the human health as well. Fly ash is found in a quite large amount so that it causes environmental problems such as air or water pollution and …
Gelam(melaleuca leucandendra) is one plant that is widely available in South Sumatra potential into cellulose extraction. His plant is widely used for building materials and wood products processed the rest of the powder timber furniture industry. While, the skin of this plant is not used for anything. In fact, from the structure of the skin that have fiber, skin of gelam has the potential to b…
Untuk menentukan cadangan hidrokarbon suatu reservoir dapat dilakukan dengan metode kurva penurunan produksi (decline curve). Berdasarkan hasil evaluasinya, maka metode kurva penurunan produksi hanya menggunakan data laju produksi, data kumulatif produksi dan waktu produksi. Metode kurva penurunan produksi ini digunakan untuk menentukan Ultimale Recovery, Remaining Reserves, dan Remaining Life.…
This research is a development research that aims to produce teaching materials for Green Chemistry Green Solvent Materials based on STEM Problem Based Learning based on steps from Amy Abbot that meet valid and practical criteria for chemistry education students. The development model used is the ADDIE development model combined with Tessmer's formative evaluation. The steps of using ADDIE star…
This book presents the new approach of resource-driven bamboo construction (RDBC), developing a clear assessment framework and operational solution to improve the value of resources and the sustainability of bamboo constructions. The book discusses how to carry out research on basic parameters and life cycle assessment, as well demonstrating the approach in practice. This book develops a sus…
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This book examines ways of saving energy by using green roofs and facades, solar devices such as building-integrated photovoltaics (BIPV), and thermal solar panels, as components of energy-efficient building envelopes. The author takes an interdisciplinary / multidisciplinary approach to the subject that analyzes several different scientific fields connected to building research—sustainabilit…
PT. ANTAM (Persero), Tbk UBPE Pongkor adalah salah satu perusahaan pertambangan yang merupakan Badan Usaha Milik Negara (BUMN) yang melakukan kegiatan eksplorasi dan eksploitasi mineral logam di Indonesia dengan total cadangan terukur mencapai 5.568.736 ton. Metode penambangan yang digunakan PT. ANTAM adalah metode penambangan bawah tanah cut and fiil. Kegiatan penambangan dilakukan dengan meng…