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Peraturan Presiden Republik Indonesia Nomor 44 Tahun 2012 Tentang Institut Teknologi Bandung sebagai Perguruan Tinggi yang Diselenggarakan oleh Pemerintah
Full text linkRekayasa Pantai dan Pelabuhan (KODE: SIP 612 341)
Full text linkIsi buku ini membahas masalah pantai yaitu masalah gelombang angin dan peramalan gelombang. Dengan membaca buku ini mahasiswa sipil diharapkan dapat lebih memahami tentang penurunan teori atau rumus persamaan gelombang amplitudo kecil, cara menghasilkan tabel gelombang. cara melakukan peramalan gelombang dan cara melakukan perhitungan komponen gelombang pasang surut
Nonlinear Finite Element Analysis of Pressurized LPG Toroidal Tank with Non-Radial Nozzle
Full text linkThis paper reports a nonlinear parametric finite element study of pressurized circular toroidal tank with non-radial cylindrical nozzle. Following to previous study by one of the authors who shows that radius ratio of 4 gives the highest limit pressure, the study was extended to determine the position of non-radial cylindrical nozzle that gives the highest limit pressure. Toroidal tank having the same volume as PERTAMINA LPG 3kg of 7.3 liter and radius ratio of 4 were used in this study. Cylindrical nozzle of 12.5 mm diameter and 10 mm height was attached perpendicular to plane of the toroid. The position of nozzle was made various along a major radius of the torus, from intrados to intrados. The position of nozzle was varied every 5 mm, from 115 mm to 210 mm. The maximum applied internal pressure was 1.5 times pressure to yield. Limits pressure were obtained via nonlinear finite element analysis using the well-known Newton-Raphson algorithm with large deformation. It was found that the best design for nozzle position, indicated by the highest limit pressure, is located between crown and extrados and close to extrados. This result conforms to the membrane theory that the highest stress occurs at the intrados and nozzle shall not be located next to that location
Aplikasi Arang Tempurung Kelapa Sebagai Adsorben Udara Pembakaran Untuk Meningkatkan Prestasi Sepeda Motor Bensin 4-Langkah
Full text linkEnergy crysis is now being faced by all people. This due to the dependence of humanbeings upon the fuel in order to ease and accelerate their activities. Consequently, there are many queues for fuels at many SPBUs in Indonesia everyday. Use of an environmentally combustion air filter technology that utilizes abundant natural resources, especially in Lampung province, namely coconut shell charcoal that has an ability to adsorb water vapor in combustion air, is capable to cope with this crysis. This charcoal was firstly made into powder before modifying it into pellet of 5 and 10 mm in diameter, with 3 mm in thickness. Experiments were performed to observe fuel consumption of a 4-stroke petrol motorcycle at road test of 5 kph for 5 km, and stasionary test of 1500, 2500, and 4000 rpm, as well as its acceleration at 0-80 and 40-80 km/h. All tests were performed for 35, 40, and 45 gram coconut shell charcoal. Results show use of this charcoal could reduce fuel consumption up to 24.36% at road test, and 29.30% at stasionary test of 4000 rpm. The increase of acceleration also occurred for about 13% at 0-80 km/h, and 20.69% at 40-80 km/h. \ud
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Keywords: Oxygen–rich combustion, Coconut shell charcoal adsorbent, Combustion air treatment.\u
Pemanfaatan Bentonit Alam Teraktivasi Pada Pretreatment Minyak Goreng Bekas Sebagai Bahan Baku Biodiesel
No full textProduction of Biodiesel from used cooking oil is usually carried out in three stages of the process, namely the purification of used cooking oil, esterification, and transesterification.However, esterification requires a lot of methanol, making it less economical. Esterification can be replaced by the adsorption.Adsorption was carried out to eliminate FFA content of used cooking oil by using activated natural bentonite adsorbent. This study consists of two main stages, namely purification and conversion. Purification consist of despicing, neutralization, and bleaching (adsorption). In this study, adsorption was carried out at the temperature variation of 30,40,50,60,70,80,90 °C to observe FFA and water content. The treated used cooking oil with lowest FFA content was then converted into biodiesel. The obtained biodiesel was analyzed its flash point, viscosity, and density. The best adsorption results occurred at adsorption temperature of 30 and 50oC with the reduction of FFA by 0.2176% and 0.192%, while it was 0.05% for the water content. As for the flash point, viscosity, and density of the obtained biodiesel is already meet the standards of biodiesel, which is 170 oC, 5.021 mm2/s, and 0.8702 kg/lt (adsorption temperature of 30 oC) and 170 oC, 5,119 mm2/s, and 0,8711 kg/lt (temperatur adsorpsi 50 oC). \ud
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Keywords :Biodiesel, Bentonite, used Cooking Oil, Adsorption\u
Surat Edaran Dirjen Dikti Nomor 24/E/T/2012 Tanggal 4 Januari 2012 Tentang Kebijakan Layanan Kenaikan Pangkat/Jabatan Akademik Dosen
Full text linkPeraturan Menteri Pendidikan dan Kebudayaan Republik Indonesia Nomor 8 Tahun 2012 Tentang Pemberian Insentif bagi Pendidik yang Bertugas pada Satuan Pendidikan di Luar Negeri
Full text linkPreliminary Study On X-Ray Diffraction Characterisation of Forsterite (MG2SIO4) Ceramics Derived From Rice Husk Silica
Full text linkFEASIBILITY STUDY OF KALIANDA COAST RING ROAD\ud IN SOUTH LAMPUNG REGENCY
Full text linkAbstract\ud
South Lampung Regency is a regency of Lampung, Sumatra, Indonesia. It has an area of 2,109.74 km² and a\ud
population of 909,989 people at the 2010 Cene sus. The capital lies at Kalianda. Administratively it is\ud
divided into 17 districts (kecamatan), 3 kelurahan and 248 desa. South Lampung has a function as a gateway\ud
for the transportation between the islands of Sumatra and Java that are served by the national road. The\ud
purpose of this study was to analyze the development of the road network in South Lampung regency,\ud
especially in the Coastal Ring Road Kalianda reviewed from various aspects and interests. The purpose of\ud
this study was to examine the possibility of building a road to connect the existing road network with\ud
facilities available / to be created. Comparison of costs and benefit is a basis in determining the economic and\ud
financial feasibility of the development and operation of transportation facilities. Results obtained from the\ud
analysis that is needed cost Rp 180,888,775,414 to build a new road. Benefits of new roads is calculated from\ud
vehicle operating cost savings is Rp. 583 079 000 000, - up to the year 2030. If used consumer surplus\ud
method, some economic indicators such as NPV is positive and interest rate level EIRR 14.9%. Considering\ud
alternative segment currently has a potential movement, as well as the potential for tourism, and the\ud
government plan to Sunda Strait bridge construction program, the development of road is feasible to be\ud
followed.\ud
Key Words: traffic count, economic analysis, consumer surplu