Alginate merupakan bahan cetak hidrokoloid yang digunakan untuk mencetak model rahang gigi. Pencetakan model rahang dilakukan pada saat masih dalam keadaan sol dengan mencampurkan bubuk alginate dengan air pada perbandingan 1:3. Pada penambahan medium pendispersi dengan temperatur tertentu ke bubuk alginate didapat viskositas yang berbeda untuk tiap temperatur,, pengukuran viskositas dilakukan …
The cooling load is the amount ofheat energy thal needs to be removed from space cooling lo maintain the temperature within the range of acceptable. Heating and cooling loads, or "thermal burden", taking into account the construction and insulation, including fioors, walls, ceilings, and roofs. Air conditioning is the treatment of the air to set the temperature, humidity, cleanness and its dist…
Penelitian ini meneliti dampak celah radial terhadap mekanika kontak dan suhu pada sendi pinggul buatan yang terbuat dari bahan CoCrMo (Cobalt-Chromium-Molybdenum). Dengan menggunakan simulasi komputasi, penelitian ini menginvestigasi bagaimana variasi celah radial mempengaruhi kinerja implan pinggul, khususnya pada tekanan kontak, deformasi, tegangan Tresca, tegangan von Mises, dan suhu. Tujua…
Indonesia sebagai negara yang beriklim tropis dimana sebagian besar bangunan-bangunannya dibuat dengan ketinggian ruang tidak lebih dari 3m, sehingga mengakibatkan temperatur ruangan yang ada pada bangunan tersebut menjadi tinggi. Fenomena ini membuat bangunan-bangunan tersebut memerlukan suatu alat untuk mengkondisikan udara didalam ruangan bangunan-bangunan tersebut seperti Air Conditioner (A…
In the process of plant growth, there are several factors that can affect plant growth and yield, such as soil moisture, light intensity, soil pH, and especially temperature, which always changes at any time. One of the plants that requires a balanced temperature in order to produce good plant yields is orchid plants. Temperatures that are too high can cause dehydration in orchid plants, and lo…
Aluminum is a non-ferrous metal that is light, strong and resistant to air and water corrosion. Due to the dangerous impact of using aluminum material on the environment, the waste produced by aluminum is recycled. In this research, the casting and molding of the research material was AA6061, which is a mixture of aluminum and coconut shell charcoal powder. The mixing and molding method is cast…
In common brass metal the zinc content is 15-37%, brass is commonly used as a substitute for copper as pipe fittings, nuts, musical instruments and shell bullets, connecting rods for pistons and shafts. Efforts to reduce the level of deformation and increase the level of ductility of brass metal is by giving it a heat tempering treatment. The purpose of this study was to determine the effect of…
Tanaman kelapa sawit merupakan tanaman yang memiliki peranan yang sangat penting bagi pertumbuhan perekonomian Indonesia. Kelapa sawit (Elaeis guineensis Jacq.) adalah jenis tanaman yang berakar serabut. Akar tanaman kelapa sawit tumbuh dari pangkal batang menyebar kesamping dan kebawah serta terdiri atas akar primer, sekunder, tersier, dan kuarter. NPK merupakan unsur hara makro yang dibutuhka…
Tides are a phenomenon of the periodic rise and fall of sea level caused by a combination of gravitational forces and the gravitational pull of astronomical objects. Tidal land is land where the availability of water is influenced by the movement of the tides on the surface of the river. Salinity is the degree of saltiness or dissolved salt content in water. Salinity is also expressed in DHL. D…
The prospect of farming in Damar Wulan Village has considerable potential if managed properly. Food crop groups and plantations such as rubber and oil palm are the most dominant commodities cultivated by village farmers. Horticultural plant groups, especially melon crops, are still very limited to be cultivated in this region. Therefore, the prospect of melon cultivation has a great opportunity…
Acid sulphate soils contain sulfidic materials (pyrite). Changes from anaerobic to aerobic conditions will cause pyrite oxidation, releasing sulfuric acid, resulting in oxidation of iron, and lowering soil pH. This study aimed to investigate the effect of dolomite application and soil water conditions on the inhibition of pyrite oxidation in acid sulfate soil. This study was conducted in the gr…
This paper presents an experimental study of forced convection heat transfer of water flow in a pipe with semi-circular grooves oriented towards the inside of the pipe. Heat is supplied through a heating wire wound around the pipe, with a constant electric current flux. The heat from the pipe wall is absorbed by the flowing water inside the pipe. Along the circumference of the pipe, three rows …
Hydroxyapatite is a derivative of calcium phosphate and is not a small part of it is also used for coating on bones because it is very good biocompatible. Copper was chosen as undoubtedly because it works to improve angiogenic and antibacterial hydroxyapatite. The addition of copper in the biomaterial is currently being prepared because it is expected to improve the biological properties of bon…
Sulphate soils contain layers of pyrite (FeS2) and if pyrite is oxidized it can lower soil pH. Pyrite oxidized soil has a characteristic rust or reddish yellow color. The pyrite oxidation rate can be reduced by adding ameliorants and controlling the water level. Under flooded conditions, pyrite poses no risk. This study aims to study the effect of coal fly ash and various water conditions on th…
India launched its maiden scientific expedition to Antarctica way back in 1981 and ever since annual expeditions are launched to address thematic research in the contemporary areas of Antarctic Science and Engineering. The initial efforts and achievements of India are not only significant but are of historical importance. This book discusses a wide array of topics that have entered the mains…
This study aims to determine the response of several BC2F2 accessions from the crossing of Inpago 5 with Inpara 8 rice varieties to drought stress in the generative phase. This research was carried out from July to December 2022 at the Greenhouse of the Department of Agricultural Cultivation, Faculty of Agriculture, Sriwijaya University, Indralaya, Ogan Ilir, South Sumatra. The method used in t…
One of the extreme phenomena that occur in Indonesia is drought. Indonesia experiences extreme drought three to four times a year. South Sumatra Province, especially Ogan Komering Ilir (OKI) Regency, is dominated by swamp land and a type of peat soil with high vulnerability to drought and can even trigger forest fires. This research was conducted to determine the levels of hazard, vulnerability…
Penginderaan jauh merupakan suatu teknik yang dapat diaplikasikan untuk pengamatan parameter oseanografi perairan seperti suhu permukaan laut baik secara spasial maupun temporal. Penelitian ini bertujuan Memetakan pola sebaran suhu permukaan laut di perairan pesisir Banyuasin Sumatera Selatan menggunakan data citra Aqua MODIS L3 mulai Desember 2019 sampai November 2021 serta Menganalisis pola s…
Konveksi merupakan proses perpindahan energi kerja gabungan antara konduksi panas, penyimpanan energi, dan gerakan mencampur. Konveksi yang disebabkan oleh suatu alat dari luar seperti pompa sebagai konveksi paksa dan dikatakan sebagai konveksi internal dimana fluida mengalir di dalam saluran yang di dalam hal ini adalah pipa yang berbentuk segitiga.Pada pengujian ini digunakan 3 buah pipa temb…
Peningkatan penggunaan plastik berdampak pada jumlah sampah plastik yang semakin banyak. Kementrian Lingkungan Hidup dan Kehutanan menyampaikan jumlah sampah yang tertimbun di Indonesia mencapai 175.000 ton per hari atau setara 64 ton per tahun dengan asumsi setiap orang menghasilkan 0,7 kg sampah per hari. Dari jumlah tersebut sampah plastik yang dihasilkan yaitu sebesar 15% dari jumlah sampah…
Plastic is something that cannot be separated from humans because the existence of plastic is very young to be found in everyday life. The existence of plastic waste is always increasing. An alternative way so that plastic waste can be utilized is to convert plastic waste into alternative fuels by the pyrolysis method. This study aims to determine the effect of temperature on the characteristic…
Based on data Preventif Maintenance at PLTU Bukit Asam from 2013 to 2021, induced draft fan has the most interference compared to other machines because there is no real-time measurement in induce draft fan so the technician must manually measure into the field. This research aims to determine the temperature of the induced draft fan using the RTD sensor and NodeMCU ESP8266 microcontroller with…
ABSTRACT This study aims to determine the tidal pattern in the waters of Pari Island and its possible impact on the distribution of salinity and temperature of seawater. The background for this research is an increase in reclamation development activities around the coastal waters of Pari Island, which causes changes in oceanographic parameters, both physical, biological and chemical. One of th…
Penelitian ini bertujuan untuk mengetahui efektivitas modul elektronik berbasis multirepresentasi pada materi suhu dan kalor yang digunakan pada pembelajaran fisika di SMA Negeri 15 Palembang terhadap hasil belajar siswa dan melihat hubungan antara gaya belajar dengan hasil belajar. Metode yang digunakan penelitian ini adalah quasi eksperimen dengan desain one group pretest-posttest design. Pop…
Penelitian ini bertujuan untuk mengatahui temperatur dari pelat pendingin terhadap laju aliran massa dan jumlah saluran pada bagian dalam pelat pendingin. Jenis penelitian ini ialah kuantitatif komparatif dengan pendekatan numerik menggunakan metode dinamika fluida komputasi. Pengambilan data pada penelitian ini menggunakan perangkat lunak Ansys Fluent 19.2 dengan melalukan simulasi terhadap 2 …
Mesin bubut merupakan salah satu komponen utama pada reboiler unit DHP E- 460. Tujuan dari penelitian ini adalah untuk mengetahui dan menganalisis distribusi temperatur, temperatur maksimal yang terjadi pada mata pahat . Pada Analisis dilakukan menggunakan metode elemen hingga (MEH) dengan bantuan perangkat lunak untuk memperoleh hasil yang diinginkan dengan memasukkan input data berupa pemodel…