Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
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KARAKTERISTIK PERKEMBANGAN PERI-URBAN DI KOTA KECIL
Get PDFPrevious research often perceived peri-urbanization as a spatial phenomenon that occurs in big cities, which creates problems for suburban areas. This article present empirical evidence of peri-urbanization in small city using the case of Tallunglipu District as a peri-urban area of Rantepao, North Toraja. Comparing the physical, social, and economic data ini 2010 and 2020 using a descriptive statistical analysis, this article found that the higher the physical, social, and economic change, the higher tendency of having a strong urban character, which indicates urbanization, and vice versa. The peri-urban development in Tallunglipu Distric can categorized into five typologies: (1) areas that have high changes in physical, social, and aspects, (2) area with high changes in physical and social aspects but low in economic aspects, (3) area with high changes in social aspect but low on physical and economic aspects, (4) area with high changes on physical aspect but low on social and economic aspects, (5) areas with low changes on physical, social, and economic aspects. Peri-urban typology based on the characteristics of level of changes can provide information for the government in formulating patterns of urban land use in peri-urban areas
Evaluasi Satellite Precipitation Product (GSMaP, CHIRPS, dan IMERG) di Kabupaten Lampung Selatan
Get PDFThe availability of rainfall data is an important requirement in various activities. The limitations of observational data make the satellit precipitation product (SPPs) as an alternative. However, the data must be verified before being used. Verification methods are done by using matric statistic methods such as correlation, error and relative bias. Meanwhile, to see the ability of SPPs in detecting rainfall events, it uses a contingency table method. The purpose of this research is to evaluate the ability of SPPs against observation data. Evaluation of SPPs rainfall data is carried out based on a time scale, namely monthly, 10 daily, and daily. This research uses the data from 2018–2020. On a monthly and 10 daily scale, the CHIRPS data shows excellent linearity and rain detection ability. On a daily scale, IMERG shows better linearity than GSMaP and CHIRPS in every season, with moderate to strong correlation coefficients. However, these data tend to be underestimated with a very large bias. In terms of detecting daily rain, GSMaP tends to be better than CHIRPS and IMERG on every season based on the CSI index. However, in the dry season and transition II, the ability tends to be lower. In general, for the amount of rainfall intensity, the three SPPs data still has a fairly large error against the observation data eventhough the ability to detect rainfall is good
PENGUATAN EKONOMI LOKAL DESA BANDING MELALUI INKUBATOR BISNIS PRODUK PERTANIAN BERBASIS TEKNOLOGI
No full textDesa Banding dengan kekayaan alamnya memiliki produk hasil olahan perikanan dan perkebunan yang selayaknya dapat berkembang dan produknya dikenal hingga ke luar Lampung. Saat ini produk UMKM Desa Banding memiliki permasalahan dalam hal daya tahan, pengemasan, dan pemasaran sehingga perlu upaya mengembangkan produk UMKM Desa Banding melalui inkubator bisnis produk pertanian berbasis teknologi. Kegiatan ini dilakukan agar Desa Banding ini dapat memperkuat ekonomi lokalnya. Metode yang digunakan adalah observasi, FGD, sosialisasi pengemasan dan izin edar, serta pelatihan pengemasan produk dengan peralatan dan kemasan yang juga diserahkan ke desa. Pelaku usaha mikro Desa Banding dan juga perangkat desa sangat antusias yang dilihat dari brand yang telah disepakati yakni BANTERA, bentuk logo kemasan yang disepakati, pembentukan tim inti UMKM Desa Banding, tambahan pengetahuan dalam pengemasan produk khususnya produk yang lama simpannya terbatas, serta memanfaatkan peralatan yang telah diberikan untuk mulai mengemas produk secara baik dan apik
Pengembangan Pengontrol Tegangan Sistem Mikrogrid Cerdas Menggunakan Sistem Baterai Penyimpan Energi
Get PDFA power outage on a conventional grid can cut the electricity supply to the entire load. In contrast, Microgrid (MG) can still supply at least the most critical local loads even though blackout occurs in the main grid. MG can also utilize renewable energy sources such as solar and wind energy to generate electricity. That is possible by the advancement of the battery energy storage system (BESS). The BESS able to maintains electricity supply to the load even in outages. The inverter on the SBPE also plays a role in stabilizing the MG output voltage by supplying or absorbing reactive power in the MG system. This paper focuses on the control development of the battery inverter primary controller. The droop control design utilizes the deadband around the nominal voltage. That becomes the improvement of the droop control method used in this study compared to the initial formulation of the droop method. The proposed method was then tested through simulation with four different scenarios. The BESS will operate in the voltage range 194.9V to 234.6V with a droop control deadband in the voltage range 198.0V to 231.0V. Based on the simulation results, the addition of SBPE with the MG scheme on the existing system can improve the quality of the voltage received by the load from 0.994p.u. to 0.997p.u. The simulation also shows that the load still gets a power supply even though there is a blackout on the main grid
Studi Inhibisi Korosi Pipa Sistem Pendingin Sekunder RSG-GAS BATAN Oleh Karboksimetil Kitosan
Get PDFCorrosion is one of the unavoidable problems in nuclear reactor cooling systems that use water as a cooling medium. secondary cooling systemThe Reaktor Serba Guna–G.A. Siwabessy (RSG-GAS) is an open recirculation cooling system that uses carbon steel pipes for water delivery. Due to the obvious open recirculation cooling system, components in the system interact with oxygen in the air, resulting in corrosion. Corrosion control in the RSG-GAS has been accomplished through the continuous injection of zinc phosphate (ZnPO4) inorganic inhibitors, but the use of these inhibitors can contribute to environmental pollution and health issues. To resolve these concerns, environmentally-friendly corrosion inhibitors such as carboxymethyl chitosan have been used. CMC (carboxymethyl chitosan) is widely used because it is more amphiprotic than other chitosan derivatives. Because of the number of functional groups in carboxymethyl chitosan, it is an effective corrosion inhibitor. The corrosion inhibition test by CMC on carbon steel in the secondary cooling water system was performed using a weight-loss method in this study with variations of 0, 1, and 3 g CMC. The steel material's composition is 0.23% C, 0.17% Si, 0.008% P, 0.004% S, 0.012% Cr, and 0.037% Mn. According to the study, the corrosion rate generated at variations of 0, 1, and 3 g CMC is 8.237, 5,645, and 5,113 mpy, respectively. According to the data, the addition of CMC can reduce the weight loss of steel due to corrosion because CMC contains many amphiprotic groups that are adsorbed on the surface in half-full d Fe orbitals
ANALISIS BIAYA MANFAAT PEMBANGUNAN FLYOVER PADA PERLINTASAN SEBIDANG SULTAN AGUNG
Get PDFBandar Lampung city is experiencing traffic congestion problems, one of them is as a result of the delay that is caused by a level crossing. One of the Streets in Bandar Lampung that has traffic congestion problem because of level crossings is Sultan Agung Street. Based on an interview with the Bandar Lampung Transportation Agency, there was a plan to build a flyover at the level crossing on Sultan Agung Street. However, the planned flyover is predicted to give negative impacts on the surrounding area. Therefore, this study was conducted to identify the costs benefits of a flyover construction to overcome traffic congestion at the level crossing on Sultan Agung Street. To determine the costs benefits, the reseachers conducted Net Present Value (NPV) and Benefit Cost Ratio (BCR) analysis with the variables of flyover construction costs, decreased income of traders around the area, and time value savings, and vehicle operating costs. Based on the analyses, the reseachers concluded that the benefits obtained from the construction of the flyover are greater than the costs so that the construction of a flyover at the level crossing on Sultan Agung Street is considered feasible from an economic point of view
STUDI UPAYA PENGOPTIMALAN PENGGUNAAN BRT TRANS PATRIOT KOTA BEKASI BERDASARKAN PREFERENSI MASYARAKAT
No full textRapid population growth is able to bring significant changes to various systems of urban community activities, with the high standard of living of the community, the higher the movement carried out. The existence of high community movement must be balanced with the provision of adequate transportation facilities and infrastructure, such as the provision of good public transportation to be able to reduce private vehicles. Public transportation is able as a solution to urban transportation problems that are able to serve the community in meeting their needs for movement. The city of Bekasi as one of the buffer cities of DKI Jakarta and as one of the metropolitan cities in Indonesia has also developed BRT as a mode of urban public transportation. In 2019 Bekasi City has integrated mass public transportation, BRT Trans Patriot. However, the number of users of this public transport is low. BRT Trans Patriot is still not used optimally by the community. Based on these problems, it is necessary to study the optimization of the use of the BRT Trans Patriot based on people's preferences. The results show that service quality affects people to use Trans Patriot BRT, and it is found that the available services are not optimal in accordance with bus rapid transit standards. Regarding this, it affects the number of Trans Patriot BRT users that are not optimal
Perancangan Algoritma Dynamic Path Planning pada Autonomous Mobile Robot Menggunakan Modifikasi Crossover Algoritma Genetika
Get PDFAlgoritma genetika digunakan untuk menghasilkan sistem navigasi cerdas pada autonomous mobile robot agar dapat menghindari tabrakan baik dengan halangan statis maupun halangan dinamis yang ada di sekitarnya. Modifikasi algoritma genetika dilakukan pada operator crossover yaitu dengan menambahkan syarat bahwa nilai fitness keturunan hasil crossover harus dibandingkan dengan induknya terlebih dahulu sebelum diteruskan ke proses mutasi gen. Lintasan utama dihasilkan dari GA statis sedangkan lintasan alternatif dihasilkan dari GA dinamis yang bekerja berdasarkan moving area sensor dan dilengkapi dengan algoritma prediksi pergerakan halangan. Hasil simulasi menunjukkan bahwa moving area sensor mampu mendeteksi halangan dinamis yang ada di sekitar lintasan utama dan apabila halangan dinamis tersebut berpotensi menabrak autonomous mobile robot maka GA dinamis akan segera membuat lintasan alternatif yang tidak jauh menyimpang dari lintasan utama sehingga autonomous mobile robot terhindar dari halangan dinamis tersebut. Setelah itu, autonomous mobile robot kembali lagi ke lintasan utama untuk kemudian menuju titik target
